JP4703965B2 - Rotary weight filling apparatus and rotary weight filling method - Google Patents

Description

The present invention relates to a rotary weight filling apparatus and a rotary weight filling method , and in particular, based on a weighing signal output from the weighing means while rotating the container together with the weighing means on which the container is placed, The present invention relates to a rotary weight filling apparatus and a rotary weight filling method for supplying an object to be weighed to the container .

As this type of rotary weight filling apparatus and rotary weight filling method, there is a conventional one disclosed in Patent Document 1, for example. According to this prior art, a Roberval type weigh scale is adopted as a weighing means, and one end of this Rovalval type weigh scale is connected to the rotating body, and a support table is connected to the other end. Then, the container placed on the support table is filled with the filling material from the filling valve, and the filling valve is closed when the weight measured by the Roberval type weigh scale reaches a predetermined weight. As a result, so-called quantitative filling in which a constant weight of filling material is filled in the container is realized.

  However, since the Roverval type weigher rotates together with the rotating body, centrifugal force acts on the Roverval type weigher by this rotation. Then, an upward component force is generated by the centrifugal force, and as a result, an error occurs in the weight measurement value by the Robarval type weigh scale (the weight value becomes lighter than the actual weight value). This error varies depending on the number of rotations of the rotating body and the magnitude of the load applied to the Roverval type weigh scale. For this reason, in the prior art, a rotation detector for detecting the rotation of the rotating body is provided, and the error is corrected based on the detection signal from the rotation detector and the weighing signal from the roval weight scale. Is done. By performing such error correction, the weight measurement accuracy is improved, and as a result, accurate quantitative filling is realized.

JP-A 63-55002

  By the way, in the rotary weight filling apparatus as described above, the container rotates as the rotating body rotates. And an air resistance acts with respect to the said container because a container rotates in this way. Furthermore, depending on the shape of the container (appearance shape), a vertical component force of the air resistance force is generated, and this vertical component force acts on the Roverval type weigh scale, resulting in an error in the weight measurement value by the Roverval type weigh scale. Occurs. Specifically, for example, as shown in FIG. 40, it is assumed that the container 1 has a substantially conical flask shape, and the container 1 rotates (moves) in the direction indicated by the arrow 2. In this case, an air resistance force acts on the container 1 as indicated by an arrow 3, that is, in a direction opposite to the moving direction of the container 1 (arrow 2). Since the side surface 4 which is the point of action of the air resistance force is inclined so as to face obliquely upward, a component force of the air resistance force is generated downward as indicated by an arrow 5. Since this component force acts as a load on the unillustrated Roverval type weighing scale below the container 1, an error occurs in the weight measurement value by the Roverval type weighing scale (the weight value is heavier than actual). In the above-described prior art, the error due to the vertical component force of the air resistance force, that is, the error due to the shape of the container cannot be corrected, so accurate weight measurement should be performed in a situation where such an error occurs. I can't. In other words, the conventional technique has a problem that accurate weight measurement cannot be performed depending on the shape of the container. This problem is taken extremely seriously in an industry that handles containers of various shapes such as the cosmetics industry and the beverage industry.

Therefore, an object of the present invention is to provide a rotary weight filling apparatus and a rotary weight filling method that can always perform accurate quantitative filling regardless of the shape of the container .

The first invention includes weighing means on which a container is placed, and a constant weight of an object to be weighed is supplied to the container based on a weighing signal output from the weighing means while rotating the container together with the weighing means. In the rotary weight filling apparatus to be supplied , comprising: a correction means for correcting a first error component included in the weighing signal and caused by the vertical component of the air resistance force with respect to the container generated by the container rotating together with the weighing means. To do . The correcting means corrects the second error component due to the vertical component force of the centrifugal force with respect to the measuring means independently of the first error component.

That is, in the first invention, when the container rotates together with the weighing means, an air resistance force acts on the container . At this time, depending on the shape of the container , a vertical component of the air resistance is generated. This vertical component force acts as a load on the measuring means. As a result, the first error component due to the vertical component of the air resistance force, in other words, the first error component due to the shape of the container is superimposed on the weighing signal output from the weighing means. Therefore, the correction unit corrects the first error component. Further, the second error component due to the vertical component force of the centrifugal force with respect to the weighing means is also superimposed on the weighing signal. The correcting means corrects the second error component independently of the first error component. As a result, a measurement signal from which the first error component and the second error component have been removed is obtained.

The correction means, based a first correction coefficient corresponding to the shape of the container, and the moving speed of the vessel for each weighing means rotational movement, corrects the first error component. That is, the magnitude of the first error component depends on the shape of the container . The shape of the container, the front projected area when the size of the container, in particular the container and the direction of rotation moving to the front of the container also included. Further, the first error component also changes depending on the moving speed of the container . Therefore, the correction means includes a first correction coefficient corresponding to the shape of the container, based on the moving speed of the container, to correct the first error component. Further, the correcting means corrects the second error component based on the second correction coefficient corresponding to the structural condition of the measuring means, the moving speed, and the measuring signal.

In this case, the correction means includes setting means for setting the first correction coefficient and the second correction coefficient , detection means for detecting the moving speed of the container that rotates together with the weighing means, and the first correction coefficient set by these setting means. And a correction execution unit that performs correction based on the second correction coefficient, the moving speed detected by the detection unit, and the measurement signal .

Further, the setting means includes a storage means in which a plurality of first correction coefficients and a plurality of second correction coefficients corresponding to a plurality of types of containers are stored, and an actual setting among the plurality of correction coefficients and the plurality of second correction coefficients. A selection unit that selects a container according to the container placed on the weighing unit, and a setting execution unit that sets the first correction coefficient and the second correction coefficient selected by the selection unit. . In this way, appropriate correction can be performed for various types of containers .

According to a second aspect of the present invention, there is provided a rotary weight for supplying a constant weight of an object to be weighed to the container based on a weighing signal output from the weighing means while rotating the container together with the weighing means on which the container is placed. in the filling method, the first error component due to the vertical component force of the air resistance to the container caused by the contained and container on the weighing signal to each metering means rotational movement, first due to the vertical component force of the centrifugal force against the metering means 2 A correction process for independently correcting each of the error components is provided.

  That is, the second invention is a method invention corresponding to the first invention, and thus has the same effect as the first invention.

According to the present invention, even if the weighing signal output from the weighing means includes the first error component due to the shape of the container , the first error component is corrected and removed from the weighing signal. Further, the second error component due to centrifugal force is also corrected. Therefore, unlike the above-mentioned prior art, in which accurate error correction cannot be performed depending on the shape of the container, accurate error correction can always be performed regardless of the shape of the container, and thus accurate quantitative filling can be performed. Can do.

  A first embodiment of a rotary weight filling apparatus to which the present invention is applied will be described with reference to FIGS.

  As shown in FIG. 1, the rotary weight filling apparatus 10 according to the first embodiment is for filling a predetermined container 12 such as a bottle with a predetermined liquid as a filling, for example, a beverage by a constant weight. In order to cope with mass production, N (N: plural) units 14, 14,... Of the same type are provided.

  Each unit 14 is provided with a mounting table 16 on which the container 12 is mounted, a weighing machine 18 to which the mounting table 16 is coupled, and a distance above the weighing machine 18. And a valve 20 as supply means for supplying a beverage therein. In addition, a stand 22 for supporting the container 12 placed on the placement table 16 is provided in the vicinity of the placement table 16. In this embodiment, N = 36, that is, 36 units 14, 14,... Are provided. Each unit 14, 14,... Is assigned an individual identification number n of 1 to N.

  As shown in FIG. 2, each unit 14, 14,... Is disposed at a portion near the periphery of the disc-shaped turntable 24 at equal intervals along the periphery, that is, every 10 degrees (= 360 degrees / N). Have been placed. The turntable 24 rotates about the rotation shaft 26 together with the rotation shaft 26 in the direction indicated by the arrow 100 in FIG. 2 (clockwise in FIG. 2). As the turntable 24 rotates, the units 14, 14,. The above-mentioned identification numbers n (= 1 to N) are assigned to the units 14, 14,... So that the values sequentially increase in the counterclockwise direction in FIG.

  Returning to FIG. 1, the upper end of the rotary shaft 26 is at a position higher than each unit 14, 14,... (Each valve 20, 20,...). Is fixed. This storage tank 28 is for temporarily storing beverages, and N pipes 30, 30,... Are radially connected to the lower part of the side wall thereof. Are individually coupled to the ends of the pipes 30, 30,... Therefore, the beverage in the storage tank 28 flows through the pipes 30, 30,... To the valves 20, 20,. And a drink is supplied in each container 12, 12, ... via these valves 20,20, .... In addition, when the storage amount of the beverage in the storage tank 28 becomes a certain amount or less, the beverage is automatically replenished into the storage tank 28 from a replenishment tank (not shown).

  On the other hand, the lower end of the rotary shaft 26 is positioned below the turntable 24 in a state of passing through the center of the turntable 24. A motor 34 (strictly, the rotation shaft of the motor 34) as a driving unit is coupled to the lower end of the rotation shaft 26 via a gear mechanism 32. The motor 34 is controlled by a controller 36 described later, and the rotating shaft 26 rotates through the gear mechanism 32 when the motor 34 is driven. The gear mechanism 32 outputs one pulse every time the rotating shaft 26 makes one rotation. Specifically, it detects a rotation reference (origin) (not shown) provided at one position on the periphery of the rotating shaft 26. An encoder 38 for rotating reference detection, which outputs one pulse each time, is combined. In addition to the encoder 38, the gear mechanism 32 is also coupled with an encoder 40 for detecting the rotation angle, which outputs α × N (α: natural number) pulses each time the rotating shaft 26 makes one rotation. Has been. The pulses output from these encoders 38 and 40 are input to the controller 36.

  The controller 36 includes a CPU (Central Processing Unit) 360 as shown in FIG. The CPU 360 is connected to a pulse input circuit 362 as an interface circuit between the encoders 38 and 40 described above, and output pulses of the encoders 38 and 40 are transmitted via the pulse input circuit 362. Input to the CPU 360. The CPU 360 recognizes the rotation angle of the rotary shaft 26 from the input pulse, and consequently recognizes the current position of each unit 14, 14. And based on this recognition result, the positional data mentioned later showing the present position for each unit 14 are generated.

  The controller 36 includes a motor control circuit 364 as an interface circuit with the motor 34 and an external control circuit 366 as an interface circuit with an external device such as a carry-in conveyor 50 (see FIG. 2) described later. These circuits 364 and 366 are connected to the CPU 360 in the same manner as the pulse input circuit 362 described above. The controller 36 has an operation panel (not shown). On the operation panel, an operation key 368 as an operation unit and a liquid crystal display 370 as a display unit are provided. These operation keys 368 and the display 370 are also connected to the CPU 360.

  Further, a memory 372 as a first storage unit is connected to the CPU 360, and a control program for controlling the operation of the CPU 360 is stored in the memory 372. Further, the memory 372 stores a coefficient list 374 as a first storage area in which coefficients A [n] and B [n] described later are stored, and a second parameter in which various parameters such as a zero measurement time Tz described later are stored. A parameter list 376 as a storage area is also provided.

  Further, the controller 36 can communicate with each weighing machine 18, 18,... Of each unit 14, 14,... Individually and mutually. A communication circuit 378 is provided as an interface circuit with the weighing machines 18, 18,. This communication circuit 378 is also connected to the CPU 360.

  On the other hand, each weighing machine 18 has, for example, a strain gauge type load cell 180 as weighing means, as shown in FIG. As shown in FIG. 5, the load cell 180 has a structure (mechanism) of a robust type, in which two beams 182 and 182 are arranged in the vertical direction, and the beams 182 and 182 are arranged on the turntable 24. It arrange | positions in the state extended | stretched to radial direction. Of the two end portions 184 and 186 connected by the beams 182 and 182, the end portion (the right end portion in FIG. 5) close to the center (rotating shaft 26) of the turntable 24 is a fixed end. The fixed end 184 is fixed to the turntable 24 by a fixing member (not shown). The other end (the left end in FIG. 4) 186 is a free end, and the mounting table 16 is coupled to the free end 186 by a coupling member (not shown).

  In the load cell 180, when a load Wy [n] is applied to the free end 186, four thin portions 188, 188,... Formed at the connection portions between the beams 182 and 182 and the end portions 184 and 186 are applied. , Distortion occurs. The strain amount is detected by a strain gauge (not shown) attached to each thin portion 188, 188,..., And finally, as shown in FIG. 4, a voltage corresponding to the magnitude of the load Wy [n] The measurement signal (hereinafter, this measurement signal is also represented by the sign Wy [n]) is output. The load Wy [n] includes the weight Wx [n] of the object to be weighed (the container 12 and the beverage filled therein) placed on the mounting table 16 and the weight of the mounting table 16 itself. The so-called initial load Wi [n] applied to the load cell 180 from the beginning, such as the weight of the coupling member described above, is also included. As will be described later, when the load cell 180 rotates with the rotation of the turntable 24, an error load We [n] is also added as the load Wy [n].

  The weighing signal Wy [n] output from the load cell 180 is amplified by the amplifier circuit 190 and then input to the A / D conversion circuit 192 as sampling means. The A / D conversion circuit 192 is, for example, of the Δ-Σ type, samples the input weighing signal at a predetermined sampling period, and generates raw load data that is a digital signal (hereinafter, this raw load data is also referred to as a code). Wy [n].) Note that the sampling period of the A / D conversion circuit 192 is, for example, about 1 ms.

  The raw load data Wy [n] converted by the A / D conversion circuit 192 is input to the CPU 194, where mechanical and electrical noise components included in the raw load data Wy [n] are removed. A predetermined filtering process such as a moving average process is performed. The filter constant (number of taps) related to the moving average process is appropriately changed according to the raw load data Wy [n]. Further, the CPU 194 removes a component corresponding to the above-described error load We [n] from the raw load data Wy [n] after the filtering process (hereinafter, this component is also represented by a symbol We [n]). Therefore, a correction process is performed. For this reason, the CPU 194 has a built-in correction circuit 196 that performs this correction process, and strictly has a function as the correction circuit 196. The CPU 194 obtains a so-called true load Wy [n] ′ that does not include the error load We [n] based on the so-called corrected load data Wy [n] ′ after processing by the correction circuit 196, and will be described later. The final measured value Wf [n] is obtained. The final measured value Wf [n] (strictly, data representing the final measured value Wf [n]) is transmitted to the controller 36 via the communication circuit 198 as an interface circuit with the controller 36. . At this time, the above-described identification number n (strictly, data representing the identification number n) is also transmitted to the controller 36 to represent the transmission source of the final measured value Wf [n].

  Further, the weighing machine 18 also functions as a control means for controlling the valve 20 corresponding to itself. In order to realize this, the weighing machine 18 has a valve control circuit 200 as an interface circuit with the valve 20. The valve control circuit 200 is connected to the CPU 194. The CPU 194 operates according to a control program stored in the memory 202, so that the function as the control means is realized. A series of operations of the CPU 194 including the function as the correction circuit 196 described above is controlled by a control program stored in the memory 202. The memory 202 also functions as a second storage unit that stores the various parameters described above.

  The weight type filling device 10 configured as described above operates as follows, thereby realizing quantitative filling. That is, when the operation key 368 of the controller 36 is used to input the type (TYPE) of the container 12 to be filled with a beverage and an operation for starting operation is performed, the motor 34 is activated. As a result, the turntable 24 rotates at a constant rotation speed in the direction indicated by the arrow 100 in FIG. As the turntable 24 rotates, the units 14, 14,..., The storage tank 28 and the pipes 30, 30,. Further, in accordance with the activation of the motor 34, the external device described above, specifically, the carry-in conveyor 50, the carry-in star wheel 52, the carry-out star wheel 54, the carry-out conveyor 56 shown in FIG. The machine also starts. The number of rotations of the turntable 24 is determined by the type of the container 12, and is, for example, about one rotation every several seconds (about 3 seconds to 5 seconds). Further, the driving speed of each external device is also controlled in accordance with the rotational speed of the turntable 24.

  When the motor 34 (the turntable 24) and each external device are started in this manner, first, empty containers 12, 12,... Are loaded by the loading conveyor 50 as shown by the arrow 102 in FIG. To be transported. The carry-in star wheel 52 rotates in the direction indicated by the arrow 104 in FIG. 2 (counterclockwise in FIG. 2), and the containers 12, 12,... One by one is conveyed to the turntable 24. As a result, the containers 12, 12,... Are placed one by one on the placement tables 16, 16,. The containers 12 set in the respective units 14 in this way naturally rotate in the direction indicated by the arrow 100 together with the units 14. During this rotation, each unit 14 fills the container 12 set therein with a beverage.

  Specifically, referring to FIG. 2 and FIG. 6, an arbitrary unit 14 having an identification number “n” (hereinafter referred to as unit n for convenience of description) has its own container 12. Zero point measurement is started at time t0 when reaching a predetermined position Pz before being set. Thus, whether the unit n has reached the zero point measurement start position Pz is recognized based on the position data described above. That is, as described above, the controller 36 (CPU 362) recognizes the current position of the unit n based on the output pulses from the encoders 38 and 40, and represents the current position of the unit n based on the recognition result. Generate position data. Then, the generated position data is transmitted to the unit n. The unit n (CPU 194) recognizes its current position including whether or not it has reached the zero point measurement start position Pz based on the position data sent from the controller 36 (see FIG. 5B). To do.

  Now, the zero point measurement started at the time point t0 when the zero point measurement start position Pz is reached is performed from the time point t0 until a predetermined zero point measurement time Tz elapses. Specifically, the unit n sets the value of the corrected load data Wy [n] ′ described above at the time point t1 when the zero measurement time Tz has elapsed as the zero measurement value Wz [n]. That is, the zero point measurement value Wz [n] is obtained based on the following equation 1.

  This zero point measurement value Wz [n] is temporarily stored in the memory 202 in the unit n. The zero point measurement value Wz [n] includes a component corresponding to the initial load Wi [n] described above. The zero point measurement time Tz is a time necessary and sufficient for removing the mechanical and electrical noise components included in the raw load data Wy [n] by the above-described moving average process, for example, 0.1 second. About 0.3 seconds. At this time, in the moving average process, a filter coefficient suitable for zero point measurement, that is, a filter coefficient corresponding to the magnitude of the load Wy [n] at the time of zero point measurement is used.

  After such zero point measurement is performed, the empty container 12 is set in the unit n by the carry-in star wheel 52 as described above. Then, after the empty container 12 is set in this way, the unit n starts measuring the weight of the empty container 12, that is, the so-called tare weight, at the time t2 when it reaches the predetermined tare measurement start position Pr. This tare weight measurement is performed from the time t2 until a predetermined tare measurement time Tr elapses. Specifically, the unit n sets the value of the corrected load data Wy [n] ′ at the time point t3 when the tare measurement time Tr has elapsed as the tare measurement value Wr [n]. That is, the tare measurement value Wr [n] is obtained based on the following equation 2.

  Note that the tare measurement value Wr [n] is also temporarily stored in the memory 202 in the same manner as the zero measurement value Wz [n] described above. Further, the tare measurement time Tr is a time necessary and sufficient for removing the noise component included in the raw load data Wy [n] by the above-described moving average process, and is, for example, about 0.1 second to 0.3 second. It is said. However, in the moving average process at this time, a filter coefficient suitable for tare weight measurement, that is, a filter coefficient corresponding to the magnitude of the load Wy [n] at the time of tare measurement is used.

  Further, the unit n subtracts the zero point measurement value Wz [n] from the tare measurement value Wr [n] and sets the result (Wr [n] −Wz [n]) as the tare weight Wq [n]. That is, the tare weight Wq [n] is obtained based on the following equation 3.

  Then, the unit n determines whether or not the container 12 set in the unit n conforms to a predetermined standard based on the tare weight Wq [n]. Specifically, it is determined whether or not the tare weight Wq [n] is within a predetermined range Wq ′ ± β based on the standard value Wq ′ determined by the standard. For example, when the tare weight Wq [n] is within the range Wq ′ ± β (in the case of Wq′−β ≦ Wq [n] ≦ Wq ′ + β), it is determined that the standard container 12 is set. To do. On the other hand, when the tare weight Wq [n] is outside the range Wq ′ ± β (in the case of Wq [n] <Wq′−β or Wq [n]> Wq ′ + β), the container 12 according to the standard is set. It is determined that it has not been performed, and waits for an opportunity to reach the zero measurement start position Pz again.

  When it is determined that the tare measurement is completed and the container 12 conforming to the standard is set, the unit n immediately opens its valve 20. Thereby, supply of the beverage to the container 12 is started. At this time, the valve 20 is opened with a relatively large diameter, so to speak, it is in a large input state. Then, when the weight of the beverage supplied to the container 12 reaches a predetermined switching weight Wa [n], specifically, at the time t4 when the following equation 4 is established, the unit n slightly reduces the diameter of the valve 20.

  Thus, by reducing the diameter of the valve 20 a little, the supply amount per unit time of the beverage from the valve 20 to the container 12 is reduced to about 1/2 to 1/3 of the large charging state, In other words, it becomes a small input state. The unit n closes the valve 20 when the weight of the beverage supplied to the container 12 reaches the predetermined supply stop weight Wb [n], specifically, at the time t5 when the following equation 5 is established. Also at this time, in the above-described moving average process, a filter coefficient corresponding to the magnitude of the load Wy [n] is applied.

  However, even if the valve 20 is closed, the supply of the beverage to the container 12 is not immediately stopped, and the beverage continues to be supplied to the container 12 for a while. This is mainly due to the fact that there is a distance (drop) between the valve 20 and the container 12 and that there is a time lag between when Formula 5 is established and when the valve 20 is closed. Accordingly, until the supply of the beverage is completely stopped and the swing of the load cell 180 due to the stop of the supply of the beverage can be regarded as having converged to some extent, in other words, from the time t5 to the predetermined time Until the stable waiting time Tw elapses, the unit n is in a standby state. This stable waiting time Tw is, for example, about 0.3 to 0.5 seconds, although it depends on the magnitude of the total load Wy [n], the required measurement accuracy, and the like.

  At time t6 when the stabilization waiting time Tw elapses, the unit n starts final measurement in order to measure the final weight of the beverage supplied to the container 12. This final measurement is performed from the time t6 until a predetermined final measurement time Tf elapses. Specifically, the unit n substitutes the value of the corrected load data Wy [n] ′ at the time point t7 when the final measurement time Tf has passed into the following equation 6 to obtain the final weight of the filled beverage To obtain a final measured value Wf [n]. This final measured value Wf [n] is also temporarily stored in the memory 202.

  It is ideal that the final measured value Wf [n] is equivalent to the target beverage filling weight, so-called target value Wt (Wf [n] = Wt). And the above-mentioned supply stop weight Wb [n] is set so that it may become such a relationship. That is, the value (Wt−ΔWg [n]) obtained by subtracting the weight of the beverage supplied to the container 12 after the valve 20 is closed, that is, the so-called drop amount ΔWg [n] from the target value Wt is the supply stop weight Wb [ n]. The final measurement time Tf is a time necessary and sufficient for removing the noise component included in the raw load data Wy [n] by the above-described moving average process, for example, about 0.1 to 0.3 seconds. It is said. Also at this time, a filter coefficient corresponding to the magnitude of Wy [n] is applied in the above-described moving average process.

  After the end of the final measurement, the unit n reaches a predetermined end position Pe. Then, at the time point t8 when the end position Pe is reached, the final measured value Wf [n] is transmitted from the unit n to the controller 36.

  After a while after the unit n passes the end position Pe, the container 12 set in the unit n is removed by the unloading star wheel 54 rotating in the direction indicated by the arrow 106 in FIG. . Thus, a series (one time) of the filling operation by the unit n is completed. The container 12 removed from the unit n is conveyed by the carry-out conveyor 56 as indicated by an arrow 108 and sent to the above-described sorter.

  On the other hand, when the controller 36 receives the final measured value Wf [n] from the unit n that has reached the end position Pe as described above, the controller 36 performs the predetermined quantitative filling by the unit n based on the final measured value Wf [n]. Determine whether it was done. Specifically, it is determined whether or not the final measured value Wf [n] is within a predetermined range Wt ± γ based on the target value Wt, and is within the range Wt ± γ ( In the case of Wt−γ ≦ Wf [n] ≦ Wt + γ), it is determined that the predetermined amount of filling is performed by the unit n. In this way, the container 12 determined to be a non-defective product is passed to the next process, for example, the capping process, through the sorting process by the sorter described above. On the other hand, when the final measured value Wf [n] is outside the predetermined range Wt ± γ (when Wf [n] <Wt−γ or Wf [n]> Wt + γ), the controller 36 It is judged that unit n has not been filled with the prescribed amount. Then, an instruction is given to the above-described sorter so that the container 12 determined to be a defective product is excluded from the production line.

  Note that the unit n may not be able to obtain the final measured value Wf [n] before reaching the end position Pe, for example, because the valve 20 is clogged. That is, for unit n, time point t8 may arrive before time point t7. In such a case, the unit n transmits data “Error” to the controller 36 as the final measured value Wf [n]. Then, the controller 36 gives an instruction to the sorter so that the container 12 which is set to “Error” is excluded from the production line.

  By the way, during this series of filling operations, that is, when the unit n is rotating with the rotation of the turntable 24, as described above, the error load is applied as the load Wy [n] applied to the load cell 180 of the unit n. We [n] is added. The error load We [n] appears in the output of the load cell 180 (the weighing signal Wy [n]) and eventually in the raw load data Wy [n], and the error load We [n] is calculated from the raw load data Wy [n]. The correction circuit 196 is provided to remove the component corresponding to []. Hereinafter, the error load We [n] and the correction circuit 16 will be described in detail.

  That is, the raw load data Wy [n] is expressed by the following formula 7.

  Then, the correction circuit 196 subtracts the error component We [n] from the raw load data Wy [n] to obtain corrected load data Wy [n] ′ from which the error component We [n] has been removed. That is, corrected load data Wy [n] ′ is obtained based on the following equation (8).

  Here, the error component We [n] is expressed by the following equation (9).

  In Equation 9, We1 [n] is an error component due to the vertical component force Fa [n] ′ of the air resistance force Fa [n], and We2 [n] is the vertical component force Fc of the centrifugal force Fc [n]. This is an error component due to [n] ′. Among these, first, the error component We1 [n] due to the vertical component Fa [n] 'of the air resistance force Fa [n] will be described.

  Referring to FIG. 7, for example, when the container 12 set in the unit n (mounting table 16) has a substantially conical flask shape and rotates (moves) in the direction indicated by the arrow 120 together with the mounting table 16. To do. The direction indicated by the arrow 120 is the same as that indicated by the arrow 100 in FIG. In this case, an air resistance force Fa [n] acts on the container 12 as indicated by an arrow 122, that is, in a direction opposite to the moving direction of the container 12 (arrow 120). Since the side surface 124 that is the point of action of the air resistance force Fa [n] is inclined so as to face obliquely upward, the air resistance force Fa [n] is directed downward as indicated by an arrow 126. Component force Fa [n] ′ is generated. The vertical component force Fa [n] ′ is expressed by the following equation (10).

  Here, φ [n] is an angle formed by the side surface 124 of the container 12 with respect to the moving direction (horizontal plane) of the container 12. The vertical component force Fa [n] ′ expressed by the equation 8 acts as a load on the load cell 180 of the unit n. That is, this vertical component force Fa [n] 'appears as an error component We1 [n]. The air resistance Fa [n] is expressed by the following equation 11.

  In this equation 11, Cd [n] is a drag coefficient determined by the shape of the container 12, and S [n] is the front projected area of the container 12, specifically, the direction in which the container 12 moves (the arrow 12 indicates This is the area of the projection plane when the container 12 is projected from the (facing direction). Ρ is the air density, and Vx is the moving speed (linear velocity) of the container 12. Here, since the shape of the container 12 can be regarded as the same between the units 14, 14,..., The drag coefficient Cd [n], the front projection area S [n], and the angle φ [n] Both can be treated as constants (constant values). Also, the air density ρ can be treated as a constant. Therefore, a portion composed of a drag coefficient Cd [n], a front projection area S [n], an angle φ [n], and an air density ρ that can be treated as these constants is combined into a coefficient, for example, A [n], In other words, when expressed by a coefficient A [n] determined by the shape of the container 12, the error component We1 [n] is expressed by Equation 12. The moving speed Vx is common among the units 14, 14,.

  Next, the error component We2 [n] due to the vertical component force Fc [n] ′ of the centrifugal force Fc [n] will be described. For example, as shown in FIG. 8, when a load Wy [n] ′ (= Wx [n] + Wi [n]) is applied to the load cell 180 of the unit n, the load cell 180 is moved downward by δ [n]. Suppose that it bends. Here, since the load cell 180 rotates together with the turntable 24, a centrifugal force Fc [n] acts on the load cell 180 outward as indicated by an arrow 130, and as indicated by an arrow 132. A component force Fc [n] ′ of the centrifugal force Fc [n] is generated upward. This vertical component force Fc [n] 'is expressed by the following equation (13).

  In Equation 13, θ [n] is an angle formed by the beams 182 and 182 of the load cell 180 with respect to the direction (horizontal plane) in which the centrifugal force Fc [n] acts. The vertical component force Fc [n] ′ represented by this equation 13 acts on the load cell 180 as a load (so-called negative load). That is, the vertical component Fc [n] ′ appears as the error component We2 [n]. The centrifugal force Fc [n] is expressed by the following equation (14).

  In Equation 14, g is the gravitational acceleration, and R [n] is the rotation radius of the free end 186 of the load cell 180 that is the point of action of the centrifugal force Fc, that is, from the free end 186 to the center of the rotation axis 26. Distance. By substituting Equation 14 into Equation 13, the error component We2 [n] can be expressed as Equation 15 below.

  Here, assuming that the spring constant in the vertical direction of the load cell 180 is k [n], the total load Wy [n] including the error component We2 [n] expressed by Expression 15 is expressed by Expression 16 below.

  Then, when this equation 16 is expressed by an equation for the deflection amount δ, it is expressed by equation 17.

  In Equation 17, the true load Wy [n] ′ is a value (Wy [n] ′ >> We [n]) that is much larger than the error load We [n]. Therefore, Expression 17 can be expressed by an approximate expression such as Expression 18 below.

  On the other hand, when the length of each beam 182 and 182 of the load cell 180 is L [n], the angle θ formed by each of the beams 182 and 182 with the horizontal plane is expressed by the following relational expression (19). .

  Here, the length L [n] of the beam 182 is much larger than the deflection amount δ [n] (L [n]) δ [n]). For example, the length L [n] is L [n] = When it is 50 mm, the deflection amount δ [n] is about δ [n] = 0.1 mm to 0.5 mm. Accordingly, the value of the angle θ is extremely small, and therefore, an approximate expression such as the following Expression 20 holds for the angle θ.

  Then, by substituting these formulas 19 and 20 into the above-described formula 15, the error component We2 [n] becomes the following formula 21.

  All of the units 14, 14,... Including the unit n are of the same standard, and therefore, the rotational radius R [n], the spring constant k [n] and the length L of the beam 182 in this equation 21. [N] can be treated as a constant. Also, the gravitational acceleration g can be treated as a constant. Accordingly, a part of the gravitational acceleration g, the rotation radius R [n], the spring constant k [n], and the beam length L [n] that can be handled as these constants is combined into one coefficient, for example, B [n], In other words, when expressed by a coefficient B [n] determined by the structural condition of the load cell 180, the error component We2 [n] is expressed by Equation 22. As described above, the moving speed Vx is common among the units 14, 14,.

  Then, by substituting this equation 22 and the above equation 12 into equation 9, the total error component We [n] included in the raw load data Wy [n] is expressed as the following equation 23.

  According to Equation 23, it can be seen that the error component We [n] can be obtained from the two constants A [n] and B [n], the true load Wy [n] ', and the moving speed Vx. However, since the true load Wy [n] ′ is an unknown number, the total load (raw load data) Wy [n] applied to the load cell 180 is used instead to represent the error load We [n]. That is, as described above, the true load Wy [n] ′ is a value far larger than the error component We [n], and the total load Wy [n] is the sum of these. Therefore, in Equation 23, the approximate value of the error component We [n] can be obtained by using the total load Wy [n] instead of the true load Wy [n] ′. In other words, the error component We [n] can be represented by the following approximate expression 24.

  That is, the correction circuit 196 (CPU 194) substitutes the constants A [n] and B [n], the current raw load data Wy [n], and the moving speed Vx into the formula 24 based on the formula 24. Thus, the error component We [n] is calculated. Then, by substituting the calculated error component We [n] and raw load data Wy [n] into the above equation 8, corrected load data (true load) Wy [n] ′ is obtained.

  In the zero point measurement described above, since the container 12 is not set in the unit n, the vertical component force Fa [n] 'of the air resistance force Fa [n] is not generated. That is, the coefficient A [n] in Equation 24 is A [n] = 0. Therefore, at the time of zero point measurement, the correction circuit 196 calculates the error component We [n] based on the following equation (25).

  Then, the corrected load data Wy [n] ′ is obtained by substituting the error component We [n] calculated based on the equation 25 and the raw load data Wy [n] into the equation 8.

  As described above, in order to calculate the error component We [n] based on the equation 24 or 25, the two constants A [n] and B [n] included in these equations are known as known numbers. There must be. Therefore, in the first embodiment, these constants A [n] and B [n] are obtained according to the adjustment mode.

It is assumed that at least the number of units 14, 14,... (N) of product samples and reference samples are prepared before entering this adjustment mode. The product sample referred to here is one in which the same container 12 as the actual product is filled with the same beverage as the actual product, and the total weight thereof is set to a certain value Wp. The certain value Wp is equivalent to , for example , the sum of the tare standard value Wq ′ and the target value Wt (Wp = Wq ′ + Wt) . On the other hand, the reference sample is a container in a shape that does not generate the error component We1 [n] due to the vertical component force Fa [n] ′ of the air resistance Fa [n] described above, for example, a cylindrical container. It is filled and its total weight is set to the same value Wp as that of the product sample. Further, it is assumed that the zero point adjustment, the span adjustment, and the temperature drift adjustment are completed by a known method before entering the adjustment mode.

  In the adjustment mode, first, zero point measurement in a stationary state is performed. Specifically, each of the units 14 and 14 when the turntable 24 is not rotating and no object is placed on the units 14, 14,. ,... Are collected by the controller 36. In other words, raw load data Wy [n] when only the initial load Wi [n] is applied as the load Wy [n] is collected in the controller 36 for each unit 14. At this time, the identification number n is also transmitted to the controller 36 together to represent the transmission source of the raw load data Wy [n]. The raw load data Wy [n] collected in the controller 36 is temporarily stored in the memory 372 in the controller 36 as a zero-point measured value Wzs [n] at rest.

  Next, the motor 34 is activated, whereby the turntable 24 rotates. At this time, the motor 34 is controlled so that the turntable 24 rotates at the maximum rated speed. Note that the external device described above is also activated when the motor 34 is activated. In this state, zero measurement is performed. That is, the raw load data Wy [n] of each unit 14, 14,... When the turntable 24 rotates at the maximum rated speed and each unit 14, 14,. , Collected by the controller 36. In other words, the load We2 [n] by the initial component Wi [n] and the vertical component force Fc [n] ′ of the centrifugal force Fc [n] is applied to each unit 14 as the load Wy [n]. The raw load data Wy [n] when in the state is collected in the controller 36. This raw load data Wy [n] is temporarily stored in the memory 372 as the operating zero point measurement value Wzd [n].

After the operation zero point measurement is completed, the motor 34 and the external device are stopped and become stationary again. In this stationary state, the above-described product sample (or reference sample) is set (placed) on each unit 14, 14,..., And the raw load data Wy [n] of each unit 14, 14,. ] Is sent to the controller 36. In other words, for each unit 14, raw load data Wy [n ] when the weight Wp of the product sample (or reference sample) and the initial load Wi [n] are applied as the load Wy [n]. ] Is collected in the controller 36. This raw load data Wy [n] is temporarily stored in the memory 372 as a stationary sample weight value Wps [n].

After the measurement of the sample weight at the stationary time, the product sample (or reference sample) set in each unit 14, 14,... Is removed from each unit 14, 14,. Then, the motor 34 is started again so that the turntable 24 rotates at the maximum rated speed, and at the same time, the external device is started. In this state, the weight of the product sample is measured. That is, product samples are sequentially set in the units 14, 14,... Via the carry-in conveyor 50 and the carry-in star wheel 52. The raw load data Wy [n] of each unit 14, 14,... When the product sample is set in this way is sequentially collected by the controller 36. In other words, for each unit 14, as the load Wy [n], the load We1 by the vertical component force Fa [n] ′ of the weight Wp of the product sample, the initial load Wi [n] , and the air resistance force Fa [n]. [N] and raw load data Wy [n] when the load We2 [n] by the vertical component force Fc [n] ′ of the centrifugal force Fc [n] is applied are collected in the controller 36. This raw load data Wy [n] is temporarily stored in the memory 372 as an in-operation product sample weight value Wpd1 [n]. The product samples set in the units 14, 14,... Are sequentially removed from the units 14, 14,. It is conveyed to.

This is followed by a weight measurement of the reference sample during operation. That is, in the state where the turntable 24 is rotating at the maximum rated rotation speed, the reference samples are sequentially set in the units 14, 14,... Via the carry-in conveyor 50 and the carry-in star wheel 52. Then, the raw load data Wy [n] of each unit 14, 14,... When the reference sample is set in each unit 14, 14,. In other words, for each unit 14, as the load Wy [n], the load We2 due to the weight Wp of the reference sample, the initial load Wi [n] , and the vertical component force Fc [n] ′ of the centrifugal force Fc [n]. Raw load data Wy [n] when [n] is applied is collected by the controller 36. This raw load data Wy [n] is temporarily stored in the memory 372 as the operating reference sample weight value Wpd2 [n]. In addition, the reference samples set in the units 14, 14,... Also pass through the end position Pe and then sequentially from the units 14, 14,. It is removed and conveyed to the carry-out conveyor 56. When the weight measurement of the reference sample is finished, the motor 34 and the external device are stopped.

  Thus, the stationary zero measurement value Wzs [n], the operational zero measurement value Wzd [n], the stationary sample weight value Wps [n], and the operational product sample weight value Wpd1 [n] for each unit 14. After the operation reference sample weight value Wpd2 [n] is collected by the controller 36, the coefficients A [n] and B [n] for each unit 14 are obtained in the controller 36.

  That is, the controller 36 (strictly speaking, the CPU 360) obtains a deviation E0 [n] of the operating zero point measured value Wzd [n] with respect to the stationary zero point measured value Wzs [n] for each unit 14. The deviation E0 [n] is expressed by the following equation 26 from the above equation 23.

  Then, the controller 36 calculates a deviation E1 [n] of the operating product sample weight value Wpd1 [n] with respect to the stationary sample weight value Wps [n] for each unit 14. The deviation E1 [n] is expressed by the following equation 27 from the above equation 23.

  Further, the controller 36 obtains a deviation E2 [n] of the operating reference sample weight value Wpd2 [n] with respect to the stationary sample weight value Wps [n] for each unit 14. The deviation E2 [n] is expressed by the following equation 28 from the equation 23.

Here, consider a simultaneous equation consisting of Equation 26 and Equation 28. Specifically, the ratio of the deviation E2 [n] of the equation 28 to the deviation E0 [n] of the equation 26 (E2 [n] / E0 [n]) is expressed by a symbol M [n]. n] is expressed as the following Expression 29.

  Then, when this number 29 is transformed, the following number 30 is obtained.

  Furthermore, when this number 30 is arranged, a quadratic equation as shown in the following number 31 is obtained.

  In this equation 31, the ratio M [n] and the load Wp are known numbers. Therefore, when the initial load Wi [n] is an unknown number, the initial load Wi [n], which is an unknown number, is obtained by the following equation 32.

  Further, when the above equation 26 is transformed into an equation for the coefficient B [n], the following equation 33 is obtained.

  Then, by substituting Equation 32 into the initial load Wi [n] in Equation 33, the following Equation 34 is obtained.

  In Equation 34, the deviation E0 [n], the ratio M [n], and the load Wp are all known numbers. The moving speed Vmax can be recognized from the number of rotations of the motor 34, and more strictly, can be detected from the output pulses of the encoders 38 and 40 described above. That is, the controller 36 obtains the coefficient B [n] based on this equation 34.

  Next, consider simultaneous equations consisting of Equations 27 and 28. Specifically, the difference between the deviation E1 [n] of Equation 27 and the deviation E2 [n] of Equation 28 is expressed by the following equation 35.

  Then, when this equation 35 is transformed into an equation for the coefficient A [n], the following equation 36 is obtained.

  In Equation 36, the deviations E1 [n] and E2 [n] are both known numbers, and the moving speed Vmax is determined from the output pulses of the encoders 38 and 40 (or the number of rotations of the motor 34) as described above. Can be detected. That is, the controller 36 obtains the coefficient A [n] based on this equation 36.

  Thus, the coefficients A [n] and B [n] for each unit 14 obtained based on the equation 36 and the above equation 34 are stored in the coefficient list 374 in the memory 372. Specifically, as shown in FIG. 9, the coefficient list 374 includes a plurality of storage areas (“TYPE_X (X = 1, 2,...)” In FIG. 9 corresponding to a plurality of types (models) of containers 12. A vertical column area separated every time) is provided. The coefficients A [n] and B [n] for each unit 14 are stored for each type of the container 12. The coefficient B [n] has the same value regardless of the type of the container 12 if the unit 14 is the same. Although not described in detail here, the contents of the coefficient list 374 can be arbitrarily edited (added, changed, and deleted).

  Further, in the adjustment mode, the parameters described above are input. That is, by using the operation key 360 of the controller 36, the movement speed Vx of each unit 14, 14,... (Or the rotation speed of the turntable 24), the zero point measurement time Tz, the tare measurement time Tr, the stabilization wait time Tw, The final measurement time Tf, the tare standard value Wq ′, the permissible value β for the tare standard value Wq ′, the switching weight Wa [n], the supply stop weight Wb [n], the target value Wt, and the permissible value γ for the target value Wt are Are sequentially input. The input parameters are stored in a parameter list 376 in the memory 372. Note that the parameter list 376 also has a plurality of storage areas (“TYPE_X (X = 1, 2,... In FIG. 10) corresponding to a plurality of types of containers 12, as shown in FIG. ) “A vertical column area delimited every time”. Each parameter is stored for each type of container 12. The contents of the parameter list 376 can be arbitrarily edited (added, changed and deleted).

  After completion of the adjustment mode, the operation is shifted to the actual filling operation. Therefore, first, the operation mode is switched to the operation mode by operating the operation key 368. Then, the model of the container 12 to be filled is input. Then, the coefficients A [n] and B [n] corresponding to the input type are read from the coefficient list 374, and the read coefficients A [n] and B [n] are the units 14, 14 respectively. , ... are sent. Further, in response to the input of the model, the parameter corresponding to the model is read from the parameter list 376 and validated. The validated parameters are also transmitted to each unit 14, 14,. However, the moving speed Vx, the target value Wt, and the allowable value γ among the parameters are not transmitted.

  When an operation for starting operation is performed by the operation key 368, the motor 34 is activated, whereby the units 14, 14,... At this time, the motor 34 is controlled such that each unit 14, 14,... Rotates (moves) at the moving speed Vx according to the validated parameters. When the motor 34 is started, an external device is also started, whereby empty containers 12, 12,... Are sequentially set in the units 14, 14,. In addition, an operation start instruction is given from the controller 36 to each unit 14, 14,..., And in response to this instruction, the filling operation is performed by the units 14, 14,. In this filling operation, the zero point measurement time Tz, the tare measurement time Td, the stabilization wait time Tw, the final measurement time Ts, the tare standard value Wq ′, the allowable value β, the switching weight Wa [n], and the supply stop weight Wb [n]. Follows the parameters (validated) given by the controller 36. In this filling operation, the error component We [n] is corrected as described above. This correction process is also performed based on the coefficients A [n] and B [n] given from the controller 36. Is called.

  When an operation to stop operation is performed by the operation key 368 during the filling operation, an instruction to that effect is given from the controller 36 to each unit 14, 14,. In response to this instruction, the filling operation by the units 14, 14,... Is stopped, and then the drive of the motor 34 and the external device is stopped, and the filling operation is completed.

  In order to realize a series of operations in each of the adjustment mode and the operation mode, the CPU 360 on the controller 36 side and the CPU 194 on the unit 14 (weighing machine 18) side perform the following multitask processing. . Note that, during this process, for example, when an interrupt operation indicating the forced termination is performed by the operation key 368, the process being executed is forcibly terminated immediately. Further, it is assumed that the zero point adjustment, the span adjustment, and the temperature drift adjustment are performed by a known method as described above before these processes are performed (before entering the adjustment mode).

  First, when the adjustment mode is selected by operating the operation key 368, the CPU 360 of the controller 36 executes the adjustment mode task shown in FIGS. That is, the CPU 360 notifies all the units 14, 14,... That the adjustment mode has been selected in step S101 of FIG. In step S103, a message requesting input of the type of the container 12 to be filled is displayed on the display 370, and in step S105, the input of the type by the operation key 368 is awaited.

  When the type of the container 12 is input in step S105, the CPU 360 proceeds to step S107, and creates a storage area dedicated to the input type in each of the coefficient list 374 and parameter list 376 in the memory 372. Then, in step S109, a message indicating that stationary zero measurement is to be started (the stationary zero measurement value Wzs [n] is obtained) is displayed on the display 370 for a fixed time, and then the process proceeds to step S111. Is changed to a message indicating that the zero point measurement is currently being performed. In step S113, in order to validate the unit 14 having the identification number n “1”, a value “1” is set in the index n for specifying the identification number n.

  After execution of step S113, the CPU 360 proceeds to step S115 and requests the unit n to acquire raw load data Wy [n]. In step S117, the process waits for the raw load data Wy [n] sent from the unit n. Here, when the raw load data Wy [n] is received from the unit n, the CPU 360 proceeds to step S119, and temporarily stores the received raw load data Wy [n] in the memory 372 as a zero-point measurement value Wzs [n] at rest. To do.

  In step S121, the CPU 360 determines whether or not the value of the index n is equal to the maximum value “N”. Here, when the value of the index n is not equal to the maximum value “N”, that is, all the units 14, 14,... Have not been measured yet (the stationary zero measurement value Wzs [n] is obtained). If not, the index n is incremented by “1” in step S123, and the process returns to step S115. On the other hand, when the value of the index n is equal to the maximum value “N”, that is, when the measurement of the zero point at rest is completed for all the units 14, 14..., The process proceeds from step S 121 to step S 125 in FIG.

  In step S125, the CPU 360 displays a message on the display 370 indicating that the operation zero point measurement will be started (the operation zero point measurement value Wzd [n] is obtained). At this time, a warning message for starting the motor 34 and the external device is also displayed. In step S127, the motor 34 is activated so as to rotate the turntable 24 at the maximum rated speed. Thus, each unit 14, 14,... Rotates (moves) at the maximum speed (linear speed) Vmax corresponding to the maximum rated rotational speed. In conjunction with the activation of the motor 34, the activation is also instructed to an external device such as the carry-in conveyor 50. In step S129, the process waits for a certain period of time, specifically until the rotation of the motor 34 (the turntable 34) is stabilized.

  After a predetermined time has elapsed in step S129, the CPU 360 proceeds to step S131 and calculates the moving speed Vmax of each unit 14, 14,... Based on the output pulses of the encoders 38 and 40. Then, the calculated moving speed Vmax is temporarily stored in the memory 372. Then, the process proceeds to step S133, and a message indicating that the currently operating zero point is being measured is displayed on the display 370. Then, in step S135, the above-described index n is set to "1", and the process proceeds to step S137.

  In step S137, the CPU 360 requests the unit n to obtain raw load data Wy [n]. In step S139, the process waits for the raw load data Wy [n] sent from the unit n. When the raw load data Wy [n] is received from the unit n, the CPU 360 proceeds to step S141, and temporarily stores the received raw load data Wy [n] in the memory 372 as the operating zero point measurement value Wzd [n]. In step S143, it is determined whether or not the value of the index n is equal to the maximum value “N”.

  In this step S143, when the value of the index n is not equal to the maximum value “N”, that is, the operation zero point measurement has not yet been completed for all the units 14, 14,... (Operation zero measurement value Wzd [n] If not obtained, the CPU 360 increments the value of the index n by “1” in step S145, and then returns to step S137. On the other hand, when the value of the index n is equal to the maximum value “N”, that is, when the operation zero point measurement is completed for all the units 14, 14,..., The process proceeds from step S 143 to step S 147. In step S147, the motor 34 is stopped and the external device is instructed to stop driving. In step S149, it is assumed that the motor 34 and the external device are completely stopped for a certain period of time. It will be in a standby state until time elapses.

  After the elapse of the predetermined time in step S149, the CPU 360 proceeds to step S151 in FIG. 13, and displays a message indicating that the stationary sample weight measurement is started (the stationary sample weight value Wps [n] is obtained) over a certain period of time. This is displayed on the display 370. In step S153, “1” is set to the index n, and in step S155, a message requesting the preparation for measurement of the unit n is displayed on the display 370. In response to this message, the product sample (or reference sample) described above is set in the unit n by the operator. At this time, depending on the position of the unit n, the carry-in star wheel 52 or the carry-out star wheel 54 may be in the way, and the product sample may not be set in the unit n. In such a case, the rotating table 24 is rotated so that the carrying-in star wheel 52 or the carrying-out star wheel 54 does not interfere with the unit n, and then a product sample is set in the unit n.

  After executing step S155, the CPU 360 proceeds to step S157, and determines whether or not a key operation indicating that the preparation for the stationary sample weight measurement is completed has been performed. When the key operation is performed, the process proceeds to step S159, and a message indicating that the currently stationary sample weight Wps [n] is being measured is displayed on the display 370. Then, the process proceeds to step S161, and waits for a certain period of time, in particular, until the time when the raw load data Wy [n] of the unit n (the swing of the load cell 180) can be considered stable has elapsed.

  After waiting in step S161, the CPU 360 proceeds to step S163 and requests the unit n to acquire the raw load data Wy [n]. In step S165, the process waits for raw load data Wy [n] sent from unit n. When the raw load data Wy [n] is received, the CPU 360 proceeds to step S167, and temporarily stores the received raw load data Wy [n] in the memory 372 as a stationary sample weight value Wps [n].

  Then, the CPU 360 proceeds to step S169 and determines whether or not the value of the index n is equal to the maximum value “N”. Here, if the value of the index n is not equal to the maximum value “N”, that is, if the measurement of the stationary sample weight Wps [n] has not been completed for all the units 14, 14,. After incrementing the value of the index n by “1”, the process returns to step S155. On the other hand, when the value of the index n is equal to the maximum value “N”, that is, when the measurement of the stationary sample weight Wps [n] is completed for all the units 14, 14,..., Step S 169 to step S 173 in FIG. Proceed to

  In step S173, the CPU 360 once clears the area (register) in the memory 372 for temporarily storing the above-described operating product sample weight value Wpd1 [n]. In other words, a value of “0” is stored in the memory 372 as the in-operation product sample weight value Wpd1 [n] of all the units 14, 14,. In step S175, a message is displayed on the display 370 indicating that the product sample weight measurement during operation is to be started (the product sample weight measurement value Wpd1 [n] during operation is obtained). Further, in step S177, the motor 34 is activated so as to rotate the turntable 24 at the maximum rated speed. Thus, each unit 14, 14,... Rotates (moves) at the maximum speed (linear speed) Vmax corresponding to the maximum rated rotational speed. In addition, in conjunction with the activation of the motor 34, an external device such as the carry-in conveyor 50 is also activated. In step S179, the process waits for a certain period of time, specifically until the rotation of the motor 34 (the turntable 34) is stabilized.

  After the elapse of the predetermined time in step S179, the CPU 360 proceeds to step S181 and displays a message on the display 370 indicating that the currently operating product sample weight Wpd1 [n] is being measured. At this time, a message requesting the introduction of the product sample is also displayed on the display 370. In response to this message, product samples are sequentially loaded onto the carry-in conveyor 50 by the operator. These product samples are sequentially set in the units 14, 14,... Via the carry-in conveyor 50 and the carry-in star wheel 52.

  After executing step S181, the CPU 360 proceeds to step S183 and sets “1” to the index n described above. In step S185, it is determined whether or not the unit n has reached the end position Pe. This determination is made based on the output pulses of the encoders 38 and 40 as described above. When the unit n reaches the end position Pe, the CPU 360 proceeds to step S187, and requests the unit n to acquire raw load data Wy [n]. In step S189, the process waits for the raw load data Wy [n] to be sent.

  When the raw load data Wy [n] is received in step S189, the CPU 360 proceeds to step S191, and compares the received raw load data Wy [n] with a predetermined threshold value Wk. Here, the threshold value Wk is a value serving as a reference for determining whether or not the received raw load data Wy [n] is data when a product sample is set in the unit n. Is a value larger than “0” and smaller than the weight Wp of the product sample (strictly, the minimum value expected as the weight Wp), more specifically, 1 / of the weight Wp (minimum value). A value of about 3 to 1/2 is set as the threshold value Wk. In this step S191, when the value of the raw load data Wy [n] is larger than the threshold value Wk, the CPU 360 indicates that the raw load data Wy [n] is data when a product sample is set in the unit n. Determination is made, and the process proceeds to step S193. In step S193, the raw load data Wy [n] is stored in the above-described area in the memory 372 as the operating product sample weight value Wpd1 [n], and then the process proceeds to step S195. On the other hand, when the value of the raw load data Wy [n] is equal to or less than the threshold value Wk in step S191, the raw load data Wy [n] is not loaded with a product sample in the unit n, that is, in an unloaded state. If it is determined that the time data is present, step S193 is skipped and the process proceeds directly to step S195.

  In step S195, the CPU 360 determines whether or not the value of the index n is equal to the maximum value “N”. Here, if the value of the index n is not equal to the maximum value “N”, that is, if the steps S185 to S193 have not been executed for all the units 14, 14,. Is incremented by “1”, and the process returns to step S185. On the other hand, when the value of the index n is equal to the maximum value “N”, that is, when steps S185 to S193 have been executed for all the units 14, 14,..., The process proceeds from step S195 to step S199.

  In step S199, the CPU 360 determines whether or not the measurement of the in-operation product sample weight Wpd1 [n] has been completed for all the units 14, 14,. This determination is made based on whether or not the operating product sample weight value Wpd1 [n] stored in the area in the memory 372 is a value other than “0”. For example, if there is at least one area in which the value “0” is stored as the operating product sample weight value Wpd1 [n], the CPU 360 still operates the operating product samples for all the units 14, 14,. It is determined that the measurement of the weight Wpd1 [n] has not been completed, and the process returns to step S183. On the other hand, when a value other than “0” is stored as the operating sample weight value Wpd1 [n] for all the units 14, 14,..., The operating product sample for all the units 14, 14,. It is determined that the measurement of the weight Wpd1 [n] has been completed, and the process proceeds to step S201 in FIG.

  In step S201, the CPU 360 once clears the area (register) in the memory 372 for temporarily storing the above-described operating reference sample weight value Wpd2 [n]. In other words, a value of “0” is stored in the memory 372 as the operating reference sample weight value Wpd2 [n] of all the units 14, 14,. In step S203, a message indicating that the operational reference sample weight measurement is to be performed (the operational reference sample weight measurement value Wpd2 [n] is obtained) is displayed on the display 370 for a predetermined time. Then, after the lapse of the predetermined time, the process proceeds to step S205, and the display content on the display 370 is changed to a message indicating that the currently operating reference sample weight Wpd2 [n] is being measured. At this time, a message requesting the input of the reference sample is also displayed on the display 370. In response to this message, the reference sample is sequentially loaded into the loading conveyor 50 by the operator. These reference samplings are sequentially set in the units 14, 14,... Via the carry-in conveyor 50 and the carry-in star wheel 52.

  After execution of step S205, the CPU 360 executes steps S207 to S223 similar to steps S183 to S199 in FIG. 14 described above. As a result, the operating reference sample weight value Wpd2 [n] of each unit 14, 14,... Is obtained. Note that these Steps S207 to S223 are obtained by replacing “Wpd1” with “Wpd2” in Steps S183 to S199 in FIG. 14, and thus detailed descriptions of Steps S207 to S223 are omitted.

  If it is determined in step S223 that the measurement of the in-operation reference sample weight Wpd2 [n] has been completed for all the units 14, 14,..., The CPU 360 proceeds to step S225. In step S225, the motor 34 and the external device are stopped, and the process proceeds to step S227 in FIG.

  In step S227, the CPU 360 calculates the coefficients A [n] and B [n] for each unit 14 in the manner described above. Specifically, the stationary zero measurement value Wzs [n] stored in the memory 372 in step S119 of FIG. 11, the operating zero measurement value Wzd [n] stored in step S141 of FIG. 12, and the step of FIG. The stationary sample weight value Wps [n] stored in S167, the operating product sample weight value Wpd1 [n] stored in Step S193 of FIG. 14, and the operating reference sample weight stored in Step S217 of FIG. Deviations E0 [n], E1 [n], and E2 [n] expressed by the above-described Expression 26 to Expression 28 are obtained from the value Wpd2 [n]. Based on these deviations E0 [n], E1 [n], and E2 [n] (finally, Equations 30 and 36), coefficients A [n] and B [n] for each unit 14 are used. Ask for. The obtained coefficients A [n] and B [n] are stored in the coefficient list 374.

  After execution of step S227, the CPU 360 proceeds to step S229 and inputs the above-described parameters (Vx, Tz, Tr, Tw, Tf, Wq ′, β, Wa [n], Wb [n], Wt, and γ). Is displayed on the display 370. Then, the process proceeds to step S231 and waits for the input of the parameter by the operation key 368. Here, if any parameter is input, the CPU 360 proceeds to step S233 and stores the input parameter in the parameter list 376. In step S235, it is determined whether all parameters have been input. If all parameters have not been input, the process returns to step S231 to request input of the remaining parameters. On the other hand, if all parameters have been input, the process proceeds from step S235 to step S237.

  In step S237, the CPU 360 notifies the end of the adjustment mode to all the units 14, 14,. In step S239, a message indicating that a series of processes in the adjustment mode has ended is displayed on the display 370 for a predetermined time, and the adjustment mode task is ended.

  For the operation of the CPU 360 on the controller 36 side, the CPU 194 on each unit 14 (unit n) side executes the pair adjustment mode task shown in FIG. 17 in the adjustment mode.

  That is, upon receiving a notification that the adjustment mode has been selected from the controller 36, the CPU 194 proceeds to step S241 and determines whether or not an acquisition request for raw load data Wy [n] has been received from the controller 36. Here, if the acquisition request is accepted, the process proceeds to step S243, and raw load data Wy [n] is transmitted to the controller 36. And after transmitting this raw load data Wy [n], it returns to step S241.

  On the other hand, if an acquisition request for raw load data Wy [n] has not been accepted in step S241, the CPU 194 proceeds to step S245. In step S245, it is determined whether an adjustment mode end notification has been sent from the controller 36. If not yet sent, the process returns to step S241. When the end notification is sent, the CPU 194 ends the pair adjustment mode task.

  Subsequently, when the operation mode is selected, the CPU 360 on the controller 36 side executes the operation mode task shown in FIGS.

  That is, the CPU 360 first notifies all units 14, 14,... That the operation mode has been selected in step S251. In step S253, a message requesting input of the type of the container 12 to be filled is displayed on the display 370. Then, the process proceeds to step S255, and it is determined whether or not the type of the container 12 has been input by the operation key 368 as a response to the message.

  When the model of the container 12 is input in step S255, the CPU 360 proceeds to step S257, and extracts the coefficients A [n] and B [n] corresponding to the input model from the coefficient list 374. In step S259, the extracted coefficients A [n] and B [n] are transmitted to the respective units 14, 14,. Further, in step S261, parameters (Vx, Tz, Tr, Tw, Tf, Wq ′, β, Wa [n], Wb [n], Wt and γ) corresponding to the model input in step S255 described above are set. Extract from the parameter list 376. In step S263, these extracted parameters are validated (stored in the memory 372 as valid parameters), and in step S265, all of the validated parameters (parameters excluding Vx, Wt, and γ) are all included. To the units 14, 14,... In step S267, a message indicating that the operation preparation is ready is displayed on the display 370, and then the process proceeds to step S269 in FIG.

  In step S269, the CPU 360 determines whether or not an operation for starting operation has been performed by the operation key 368, that is, whether or not an operation start command has been input from the operation key 368. When an operation start command is input, the process proceeds to step S271, and a message indicating that it is currently operating is displayed on the display 370. In step S273, the motor 34 and the external device are activated. At this time, the motor 34 and the external device are controlled such that each unit 14, 14,... Moves (rotates) at a speed Vx according to the validated parameters. Then, the CPU 360 proceeds to step S275, instructs all units 14, 14,... To start operation, and then starts execution of the timing control task in step S277. This timing control task will be described in detail later.

  After execution of step S277, the CPU 360 stands by in step S279 until a predetermined time, specifically, a time during which it can be considered that an empty container 12 is set in each unit 14, 14,. And after progress of this fixed time, it progresses to step S281 and starts performing a data acquisition task. Thereby, the filling operation by each unit 14, 14,... Is started. The data acquisition task started in step S281 will be described in detail later.

  Then, the CPU 360 proceeds to step S283 and determines whether or not an operation to stop operation has been performed by the operation key 368, that is, whether or not an operation stop command has been input from the operation key 368. Here, when an operation stop command is input, the process proceeds to step S285 to instruct all units 14, 14,. Then, after completing the above-described data acquisition task in step S287, the timing control task is terminated in step S289. Further, after stopping the motor 34 and the external device in step S291, a message indicating that the operation is stopped is displayed on the display 370 for a predetermined time in step S293. And after execution of this step S293, a series of operation mode tasks are ended.

  Details of the above-described timing control task will be described with reference to FIG. In this timing control task, the CPU 360 first acquires output pulses of the encoders 38 and 40 in step S301. In step S303, “1” is set to the index n described above, and then the process proceeds to step S305.

  In step S305, the CPU 360 determines whether the unit n has reached the zero point measurement start position Pz based on the output pulses of the encoders 38 and 40 acquired in step S301. Here, when the unit n has reached the zero point measurement start position Pz, the process proceeds to step S307. After that is notified to the unit n by the position data described above, the process proceeds to step S309. On the other hand, when the unit n has not reached the zero point measurement start position Pz, the process skips step S307 and proceeds directly to step S309.

  In step S309, the CPU 360 determines whether the unit n has reached the tare measurement start position Pr based on the output pulses of the encoders 38 and 40 described above. Here, when the unit n reaches the tare measurement start position Pr, the process proceeds to step S311. After that is notified to the unit n by the position data, the process proceeds to step S313. On the other hand, if the unit n has not reached the tare measurement start position Pr, the process skips step S311 and proceeds directly to step S313.

  In step S313, the CPU 360 determines whether the unit n has reached the end measurement start position Pe based on the output pulses of the encoders 38 and 40. Here, when the unit n has reached the end measurement start position Pe, in step S315, this is notified to the unit n by the position data, and then the process proceeds to step S317. On the other hand, if the unit n has not reached the end measurement start position Pe, the process skips step S315 and proceeds directly to step S317.

  In step S317, the CPU 360, based on the output pulses of the encoders 38 and 40, strictly based on the output pulses obtained over a predetermined period, the current movement of the unit n (all units 14, 14,...). The speed Vx is calculated. In step S319, the calculated moving speed Vx is notified to the unit n, and the process proceeds to step S321.

  In step S321, the CPU 360 determines whether or not the value of the index n is equal to the maximum value “N”. Here, if the value of the index n is not equal to the maximum value “N”, that is, if all the units 14, 14,... Have not been completely executed, the index n is determined in step S323. Is incremented by “1”, and the process returns to step S305. On the other hand, when the value of the index n is equal to the maximum value “N”, that is, when steps S305 to S319 have been executed for all the units 14, 14,..., The process returns to the first step S301.

  Next, the details of the data acquisition task will be described with reference to FIG. In this data acquisition task, the CPU 360 first sets “1” to the index n described above in step S331. In step S333, it is determined whether or not the unit n has reached the end position Pe. When the unit n has reached the end position Pe, the process proceeds to step S335.

  In step S335, the CPU 360 requests the unit n to obtain the final measurement value Wf [n]. In step S337, it is determined whether or not the final weighing value Wf [n] is sent from the unit n. If it is sent, the process proceeds to step S339, and the final weighing value Wf [n] is “Error”. Judge whether or not. Here, if it is not “Error”, the process further proceeds to step S341, and it is determined whether or not the final measured value Wf [n] is within the above-described range Wt ± γ. If it is within the range Wt ± γ (Wt−γ ≦ Wf [n] ≦ Wt + γ), the process proceeds to step S343.

  On the other hand, if the final measured value Wf [n] is “Error” in step S339, the CPU 360 proceeds to step S345. In step S345, an instruction is given to the above sorter so that the unit n is excluded from the production line, and then the process proceeds to step S343. Similarly, when the final measured value Wf [n] is out of the above-described range Wt ± γ in step S341 (Wf [n] <Wt−γ or Wf [n]> Wt + γ), the process goes through step S345 and then step S343. Proceed to

  In step S343, the CPU 360 determines whether or not the value of the index n is equal to the maximum value “N”. Here, when the value of the index n is not equal to the maximum value “N”, that is, when the final measured value Wf [n] has not yet been obtained from all the units 14, 14..., In step S 347. After incrementing the value of the index n by “1”, the process returns to step S333. On the other hand, when the value of the index n is equal to the maximum value “N”, that is, when the final measured value Wf [n] has been obtained from all the units 14, 14,..., The process returns to the first step S331.

  On the other hand, the CPU 194 of each unit 14 operates as follows in the operation mode.

  In other words, upon receiving notification from the controller 36 that the operation mode has been selected, the CPU 194 executes the anti-operation mode task shown in FIG. In this anti-operation mode, first, in step S351, the controller 36 waits for the coefficients A [n] and B [n] (strictly, data representing them) to be sent. When these coefficients A [n] and B [n] are received, the process proceeds to step S353, and the received coefficients A [n] and B [n] are stored in the memory 202.

  Further, the CPU 194 waits for a parameter (validated parameter) to be sent from the controller 36 in step S355. When the parameter is received, the process proceeds to step S357, and the received parameter is stored in the memory 202. In step S359, the controller 36 waits for an operation start instruction to be sent.

  Upon receiving the operation start instruction in step S359, the CPU 194 proceeds to step S361 and starts executing the error calculation formula switching task. In step S363, execution of the correction task is started, and in step S365, execution of the filling task is started. In this way, when the execution of the error calculation formula switching task, the correction task, and the filling task is started, the filling operation according to the above-described procedure is performed. The error calculation formula switching task, the correction task, and the filling task will be described in detail later.

  After execution of step S365, the CPU 194 proceeds to step S367 to determine whether or not an acquisition request for the final measurement value Wf [n] has been received from the controller 36. When the acquisition request is accepted, the process proceeds to step S369, and the final measured value Wf [n] is transmitted to the controller 36. Then, after transmitting the final measured value Wf [n], the process returns to step S367. On the other hand, if an acquisition request for the final measured value Wf [n] has not been received in step S367, the process proceeds to step S371, and it is determined whether an operation stop instruction has been received from the controller 36. If the operation stop instruction has not been received, the process returns to step S367.

  If the operation stop instruction has not been received, the CPU 194 returns to step S367. On the other hand, when an operation stop instruction is received, the process proceeds to step S373, where the execution of the filling task started in step S365 described above is terminated, and further, in step S375, the execution of the correction task started in step S363 described above is terminated. In step S377, the execution of the error calculation formula switching task started in step S361 described above is terminated, and the series of anti-operation mode tasks is terminated.

  With reference to FIG. 23, the error calculation formula switching task will be described in detail. In this error calculation formula switching task, the CPU 194 first determines whether or not itself (strictly, the unit 14 having the CPU 194) has reached the zero point measurement start position Pz in step S381. This determination is made based on the above-described position data sent from the controller 36. If it is determined that the zero point measurement start position Pz has been reached, the process proceeds to step S383, and the error calculation formula for zero point measurement expressed by the above-described equation 25 is validated.

  After execution of step S383, the CPU 194 proceeds to step S385 and determines whether or not the CPU 194 has reached the tare measurement start position Pr [n]. This determination is also made based on the position data described above. Then, when the tare measurement start position Pr is reached, the process proceeds to step S387, and this time, the error calculation formula for placing the container expressed by Expression 24 is validated. And after execution of this step S387, it returns to step S381.

  Next, the correction task will be described with reference to FIG. In this correction task, first, in step S391, the CPU 194 determines whether or not new raw load data Wy [n] is output from the A / D conversion circuit 192, in other words, the new raw load data to the correction circuit 196. It is determined whether or not Wy [n] has been input.

  Here, when new raw load data Wy [n] is input, the CPU 194 proceeds to step S393, and the error calculation formula (Formula 24 or Formula 25) currently enabled in the above-described error calculation formula switching task (Formula 24 or Formula 25). Based on, the error component We [n] is calculated. Specifically, the raw load data Wy [n] input in step S391, the coefficients A [n] and B [n] stored in the memory 202 in step S353 of FIG. 22, and the movement notified from the controller 36. An error component We [n] is calculated by substituting the velocity Vx (see step S319 in FIG. 20) into the error calculation formula.

  Then, the CPU 194 proceeds to step S395, and obtains the true load Wy [n] ′ based on the above equation 8. Specifically, the true raw load Wy [n] ′ is calculated by substituting the current raw load data Wy [n] and the error component We [n] calculated in step S395 into the formula 8. Then, after calculating the true load Wy [n] ′, the process returns to step S391.

  Next, details of the filling task will be described with reference to FIGS. 25 and 26. In this filling task, the CPU 194 first determines whether or not it has reached the zero point measurement start position Pz in step S401 of FIG. When the zero measurement start position Pz is reached, the process proceeds to step S403, where a timer for measuring the zero measurement time Tz is reset and immediately started. In step S405, the process waits for the zero measurement time Tz to elapse.

  When the zero point measurement time Tz elapses, the CPU 194 proceeds from step S405 to step S407, and obtains the zero point measurement value Wz [n] based on the above-described equation 1. That is, the value of the corrected load data Wy [n] ′ at the time point t1 when the zero point measurement time Tz has elapsed is set as the zero point measurement value Wz [n]. Then, this zero point measurement value Wx [n] is temporarily stored in the memory 202.

  Then, the CPU 194 proceeds to step S409 and determines whether or not the CPU 194 has reached the tare measurement start position Pr. When the tare measurement start position Pr is reached, the process proceeds to step S411, where a timer for measuring the tare measurement time Tr is reset and immediately started. In step S413, the process waits for the tare measurement time Tr to elapse.

  When the tare measurement time Tr elapses, the CPU 194 proceeds from step S413 to step S415, and obtains the tare measurement value Wr [n] based on the above equation 2. That is, the value of the corrected load data Wy [n] ′ at the time point t3 when the tare measurement time Tz has elapsed is set as the tare measurement value Wr [n]. The tare measurement value Wr [n] is also temporarily stored in the memory 202.

  Then, the CPU 194 proceeds to step S417, and calculates the tare weight Wq [n] based on the above-described equation 3. That is, the tare weight Wq [n] is calculated by substituting the measured tare value Wr [n] obtained in step S415 and the zero point measured value Wz [n] obtained in step S407 described above into Equation 3.

  Further, the CPU 194 proceeds to step S419 and determines whether or not the container 12 conforming to the standard has been set in itself (unit 14) based on the tare weight Wq [n] calculated in step S417 described above. Specifically, it is determined whether or not the tare weight Wq [n] is within a predetermined range Wq ′ ± β, and if it is present (Wq′−β ≦ Wq [n] ≦ Wq ′ + β) Then, it is determined that the standard container 12 is set, and the process proceeds to the next step S421. On the other hand, when the tare weight Wq [n] is out of the predetermined range Wq ′ ± β (Wq [n] <Wq′−β or Wq [n]> Wq ′ + β), the container 12 according to the standard is If it is determined that it has not been set, the process returns to step S401 to wait for the next opportunity to reach the zero point measurement start position Pz.

  In step S421, the CPU 194 controls the valve 20 so that the supply of the beverage to the container 12 is started. As a result, the valve 20 enters a large input state. Then, the CPU 194 proceeds to step S423 in FIG.

  In step S423, the CPU 194 determines whether or not the weight of the beverage supplied to the container 12 has reached the switching weight Wa [n]. That is, it is determined whether or not the above equation 4 is established. Here, when the weight of the supplied beverage has not yet reached the switching weight Wa [n], the process proceeds to step S425, and it is determined whether or not the beverage has reached the end position Pe. This determination is also made based on the position data described above. If the end position Pe has not yet been reached, the process returns from step S425 to step S423.

  On the other hand, when the weight of the beverage already supplied reaches the switching weight Wa [n] in step S423, in other words, when the time point t4 arrives, the CPU 194 proceeds to step S427 and slightly reduces the aperture of the valve 20. As a result, the valve 20 transitions from the large input state to the small input state.

  Then, the CPU 194 proceeds to step S429 and determines whether or not the weight of the supplied beverage has reached the supply stop weight Wb [n]. That is, it is determined whether or not the above formula 5 is established. Here, when the weight of the supplied beverage has not yet reached the supply stop weight Wb [n], the process proceeds to step S431, and it is determined whether or not the beverage has reached the end position Pe. If the end position Pe has not yet been reached, the process returns from step S431 to step S429.

  On the other hand, when the weight of the beverage already supplied reaches the supply stop weight Wb [n] in step S429, in other words, when the time point t5 comes, the CPU 194 proceeds to step S433 and closes the valve 20. Thus, after the beverage of the above-described drop amount ΔWg [n] is supplied to the container 12, the supply of the beverage is completely stopped. Then, in step S435, the CPU 194 resets a timer for measuring the stable waiting time Tw, starts the timer immediately, and then proceeds to step S437.

  In step S437, the CPU 194 determines whether or not the stabilization waiting time Tw has elapsed. If the stabilization waiting time Tw has not yet elapsed, the process proceeds to step S439, and it is determined whether or not it has reached the end position Pe. If the end position Pe has not been reached, the process returns from step S439 to step S437.

  When the stable waiting time Tw elapses in step S437, in other words, when the time point t6 arrives, the CPU 194 proceeds to step S441, and this time resets a timer for measuring the final measurement time Tf and starts it immediately. In step S443, it is determined whether or not the final measurement time Tf has elapsed. If not, the process proceeds to step S445 to determine whether or not the terminal has reached the end position Pe. If the end position Pe has not been reached, the process returns to step S443.

  When the final measurement time Tf elapses in step S443, the CPU 194 proceeds to step S447, and calculates the final measurement value Wf [n] based on the above equation 6. Specifically, the value of the corrected load data Wy [n] ′ at the time point t7 when the final measurement time Tf has passed and the tare measurement value Wr [n] stored in the memory 202 in step S415 described above are substituted into Equation 6. As a result, the final measured value Wf [n] is calculated. Then, after the calculated final measured value Wf [n] is stored in the memory 202, the process returns to step S401 in FIG. 25 to repeat the filling operation.

  When the end position Pe is reached in step S445, that is, when the final waiting time Tw has elapsed but the final weighing value Wf [n] has not been obtained, the CPU 194 proceeds to step S449 and proceeds to the final weighing value. The above-described data “Error” is set as Ws [n]. And after execution of this step S449, it returns to step S401 of FIG. Similarly, when the end position Pe is reached in step S439, that is, when the final weighing value Wf [n] is not obtained even though the filling of the beverage into the container 12 is completed, the process goes through step S449 in the same manner as in FIG. The process returns to step S401.

  Further, when the end position Pe is reached in the above-described step S431, that is, when the end position Pe is reached in the small injection state, the CPU 194 closes the valve 20 in step S451. Then, after step S449, the process returns to step S401 in FIG. Also, when the end position Pe is reached in step S425, that is, when the end position Pe is reached in the large input state, the process returns to step S401 in FIG. 25 through step S451 and step S449.

  As described above, according to the first embodiment, the error component We [n] is added to the weighing signal (raw load data) Wy [n] output from the load cell 180 of the unit 14 as each unit 14 rotates. ], The error component We [n] is corrected by the correction circuit 196. Specifically, the error component due to the vertical component force Fa [n] ′ of the air resistance force Fa [n], in other words, the error component We1 [n] due to the shape of the container 12 depends on the shape of the container 12. The correction is made based on the coefficient A [n] and the moving speed Vx of the unit 14. The error component We [n] due to the vertical component force Fc [n] ′ of the centrifugal force Fc [n] includes the coefficient B [n] determined by the structural condition of the load cell 180, the raw load data Wy [n], and the unit 14. Is corrected based on the moving speed Vx. Then, the true load Wy [n] 'is obtained based on the corrected load data Wy [n]' after the correction, and the filling operation is performed. Therefore, unlike the above-described prior art in which accurate error correction cannot be performed depending on the shape of the container, accurate (high accuracy) error correction can always be performed regardless of the shape of the container 12, and thus always accurate. A quantitative filling can be performed.

  The container 12 has been illustrated as having an approximately Erlenmeyer flask shape, but may have other shapes. That is, if it is a container having an inclined side surface, the same effect as described above is exhibited. In addition, the filling is not limited to beverages, but may be other liquids such as alcohol and oil. Furthermore, the present invention can be applied to not only liquids but also solids such as powder particles.

Moreover, although the container 12 was set to each unit 14 (mounting table 16) and the said container 12 was removed from the unit 14 after completion | finish of filling, it was set as the structure which is not restricted to this. For example, the present invention can be applied to a so-called weighing hopper configuration in which the mounting table 16 itself has a function as a container .

  Furthermore, although the strain gauge type thing was employ | adopted as the load cell 180, you may employ | adopt things other than this. Further, the structure of the load cell 180 is not limited to the Robert type.

  The flowcharts shown in FIGS. 11 to 26 described above are only examples until they are tired, and are not limited to these as long as the same operations and effects as described in the first embodiment can be obtained. Absent. For example, in the first embodiment, the controller 36 calculates the coefficients A [n] and B [n] for each unit 14, 14,... And B [n] may be obtained. Further, the coefficients A [n] and B [n] may be calculated by mathematical formulas (algorithms) other than those described in the first embodiment.

  Further, in order to simplify the operation in the adjustment mode, for example, the coefficients A [n] and B [n] are calculated only for one (or specific) unit 14 and the calculation results are calculated as the other units 14. , 14,..., And the coefficients A [n] and B [n] are obtained only for some of the plural units (<N) 14, 14,. May be applied to all the units 14, 14,.

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  In other words, in the rotary weight filling apparatus 10 described above, what kind of beverage is filled in what container 12 and how much weight is determined in advance. Therefore, in order to realize accurate quantitative filling by the above-described procedure (see FIG. 6), it is not always necessary to obtain the true (to be accurate) load Wy [n] ′. It is sufficient if the true load Wy [n] ′ is obtained only at t3), when the beverage supply is stopped (time point t5) and at the final measurement time (time points t6 to t7). When determining whether or not the empty container 12 set in each unit 14 is in accordance with the standard as described above, the true load is also measured at the time of zero point measurement (time t0 to t1). It is necessary to obtain Wy [n] ′.

  Therefore, in the second embodiment, the true load Wey [n] ′ is obtained only at the time of zero point measurement, tare measurement, beverage supply stoppage and final measurement, that is, the error component We [n] described above is accurately obtained. Other than that, the error component We [n] is not particularly involved in the correction. For this reason, the correction circuit 196 of each unit 14 is configured as follows. Before describing the correction circuit 196, first, the error component We [n] at the time of zero point measurement, tare measurement, beverage supply stop and final measurement will be analyzed.

  That is, as described above, the error component We [n] of an arbitrary unit n is expressed by Equation 23. At the time of zero measurement, the coefficient A [n] in Equation 23 is A [n] = 0. The true load Wy [n] ′ is Wy [n] ′ = Wi [n]. Accordingly, the error component We [n] at the time of zero point measurement is expressed by the following Expression 37.

  Here, the coefficient B [n] and the initial load Wi [n] are both constants. Therefore, when these constant portions are combined into one and represented by a coefficient a [n], for example, the error component We [n] at the time of zero point measurement is expressed by the following equation (38).

  Further, at the time of tare measurement, the true load Wy [n] ′ in the above equation 23 is ideally Wy [n] ′ = Wq ′ + Wi [n]. Therefore, the error component We [n] at the time of tare measurement is expressed by the following equation (39).

  In Equation 39, the coefficients A [n] and B [n], the tare standard value Wq ′, and the initial load Wi [n] are all constants. Therefore, when these constant portions are combined into one and represented by, for example, a coefficient b [n], the error component We [n] at the time of tare measurement is expressed by the following equation 40.

  When the beverage supply is stopped, the true load Wy [n] ′ in Equation 23 is ideally Wy [n] ′ = Wq ′ + Wb [n] + Wi [n]. Therefore, the error component We [n] at the time of tare measurement is expressed by the following equation (41).

  Here, the coefficients A [n] and B [n], the supply stop weight Wb [n], and the initial load Wi [n] are all constants. Therefore, when these constant parts are combined into one and expressed by a coefficient c [n], for example, the error component We [n] at the time of stopping the supply of beverage is expressed by the following equation 42.

  Further, at the time of final measurement, the true load Wy [n] ′ in Equation 23 is ideally Wy [n] ′ = Wq ′ + Wt + Wi [n]. Therefore, the error component We [n] at the time of final measurement is expressed by the following equation 43.

  In this equation 43, the coefficients A [n] and B [n], the target value Wt, and the initial load Wi [n] are all constants. Therefore, when these constant portions are combined into one and represented by a coefficient d [n], for example, the error component We [n] at the time of final measurement is expressed by the following equation 44.

  As can be seen from these equations 38, 40, 42 and 44, the error component We [n] at the time of zero point measurement, at the time of tare measurement, at the time of stopping the supply of beverage, and at the time of final measurement are all unit n The moving speed Vx can be expressed as a function. The correction circuit 196 corrects the error component We [n] at each of the zero point measurement, the tare measurement, the beverage supply stop, and the final measurement based on these Equations 38, 40, 42, and 44. To do.

  Specifically, when an arbitrary unit n reaches the above-described zero measurement start position Pz, that is, at time t0 in FIG. 27 (a), the correction circuit 196 (CPU 194) of the unit n performs the zero measurement of Equation 38. Enable the time error calculation formula. Then, an error component We [n] is calculated based on the validated equation (Equation 38), and a true load (corrected load data) Wy [n] ′ is obtained. Note that the true load Wy [n] ′ is obtained based on Equation 8 as in the first embodiment.

  Then, when the unit n reaches the tare measurement start position Pr, that is, at the time point t2 in FIG. 27A, the correction circuit 196 of the unit n validates the tare measurement error calculation formula of Equation 40. Then, the error component We [n] is calculated based on the validated expression (Equation 40), and the true load Wy [n] ′ is obtained.

  Furthermore, as shown in FIG. 27 (a), when the filling weight of the beverage by the unit n reaches a certain threshold value Wb [n] ′ smaller by the predetermined amount ΔWb [n] than the supply stop weight Wb [n], that is, actually When the time point t5 ′ is slightly before the supply stop time t5, the correction circuit 196 of the unit n validates the supply stop time error calculation formula of Equation 42. Then, the error component We [n] is calculated based on the validated expression (Equation 42), and the true load Wy [n] ′ is obtained. The value of the predetermined amount ΔWb [n] is, for example, about 10% of the supply stop weight Wb [n]. In addition, the error calculation formula (Equation 42) for the supply stop time t5 is validated at the time point t5 ′ before the actual supply stop time t5 in this way, for example, at the supply stop time t5. The reason why the equation (Equation 42) is validated is that the calculation of the error component We [n] by the validated equation is not in time, and accurate error correction cannot be performed.

  Then, as shown in FIG. 27 (a), a predetermined time Tw that is slightly shorter than the stable waiting time Tw from t5 when the beverage filling weight by the unit n reaches the supply stop weight Wb [n] (when the beverage supply is stopped). At the point of time t6 when “elapsed”, in other words, at the point of time t6 ′ slightly before the final measurement (t6 to t7), the correction circuit 196 of the unit n calculates the error calculation formula for final measurement at the time of Equation 44. Enable. Then, the error component We [n] is calculated based on the validated equation (Equation 44), and the true load Wy [n] ′ is obtained. It should be noted that the error calculation formula (formula 44) for the final measurement is validated at the time t6 ′ before the final measurement (t6 to t7) as described above. This is because of the same reason that the error calculation formula for stopping supply (Equation 42) is validated.

  Now, in order to correct the error component We [n] at the time of zero point measurement, tare measurement, beverage supply stop and final measurement based on the equations 38, 40, 42 and 44 as described above. The constants a [n], b [n], c [n], and d [n] included in the equations 38, 40, 42, and 44 need to be known as known numbers. Therefore, in the second embodiment, these constants a [n], b [n], c [n], and d [n] are obtained according to the adjustment mode.

  It is assumed that at least the number of units 14, 14,... (N) of empty container samples, in-fill product samples, and in-fill product samples are prepared before entering the adjustment mode. The empty container sample mentioned here is an empty container 12 that is the same as an actual product, and can be regarded as having a weight equivalent to the tare standard value Wq ′. The halfway product sample is a product in which the same beverage as the actual product is filled in the same container 12 as the actual product by the supply stop weight Wb [n], and its total weight is the tare standard value Wq ′. This is equivalent to the sum (Wq ′ + Wb [n]) of the supply stop weight Wb [n]. Furthermore, the filled product sample is obtained by filling the same container 12 as the actual product with the same beverage as the actual product by the target value Wt, and its total weight is the tare standard value Wq ′ and the target value Wt. Is equivalent to the sum (Wq ′ + Wt). Also in this second embodiment, it is assumed that the above-described zero point adjustment, span adjustment, and temperature drift adjustment are completed before entering the adjustment mode.

  In the adjustment mode, first, zero point measurement in a stationary state is performed. Specifically, the raw load data Wy [n] of each unit 14, 14,... When the turntable 24 is not rotating and each unit 14, 14,. Collected by the controller 36. In other words, raw load data Wy [n] when only the initial load Wi [n] is applied as the load Wy [n] is collected in the controller 36 for each unit 14. The raw load data Wy [n] is temporarily stored in the memory 372 in the controller 36 as a zero-point measured value Wzs [n] at rest.

  Next, the motor 34 is activated, whereby the turntable 24 rotates. At this time, the motor 34 is controlled so that the turntable 24 rotates at the maximum rated speed. Note that the external device is also activated simultaneously with the activation of the motor 34. In this state, zero measurement is performed. That is, the raw load data Wy [n] of each unit 14, 14,... When the turntable 24 rotates at the maximum rated speed and each unit 14, 14,. , Collected by the controller 36. In other words, the initial load Wi [n] and the maximum error load We [n] (= We2 [n]) when no load is applied as the load Wy [n] for each unit 14. The raw load data Wy [n] at the time of is in the controller 36. This raw load data Wy [n] is temporarily stored in the memory 372 as the operating zero point measurement value Wzd [n].

  After the operation zero point measurement is completed, the motor 34 and the external device are stopped and become stationary again. In this stationary state, the above-described empty container sample is set (placed) on each unit 14, 14,..., And the raw load data Wy [n] of each unit 14, 14,. 36. In other words, the raw load data Wy [n] when the weight Wq ′ of the empty container sample and the initial load Wi [n] are applied as the load Wy [n] for each unit 14. Collected by the controller 36. This raw load data Wy [n] is temporarily stored in the memory 372 as a stationary space-time container sample weight value Wrs [n].

Then, in place of the above-described empty container sample set in each unit 14, 14,..., An intermediate product sample is set in each unit 14, 14,. In this way, the raw load data Wy [n] of each unit 14, 14,... When the in-fill sample is set in each unit 14, 14,. 36. In other words, the raw load when the weight (Wq ′ + Wb [n]) and the initial load Wi [n] of the in-fill product sample are applied as the load Wy [n] for each unit 14. Data Wy [n] is collected in the controller 36. The raw load data Wy [n] is temporarily stored in the memory 372 as the stationary filling sample weight value Wbs [n].

In addition, in place of the above-mentioned in-filling product samples set in the units 14, 14,..., Filling completion product samples are set in the units 14, 14,. In this way, the raw load data Wy [n] of each unit 14, 14,... When the filled product sample is set in each unit 14, 14,. 36. In other words, the raw load data Wy [when the weight (Wq ′ + Wt) of the filled product sample and the initial load Wi [n] are applied as the load Wy [n] for each unit 14. n] is collected in the controller 36. The raw load data Wy [n] is temporarily stored in the memory 372 as a stationary filling completed product sample weight value Wfs [n].

After the measurement of the weight of each sample at the stationary time, the filled product sample set in each unit 14, 14,... Is removed from each unit 14, 14,. Then, the motor 34 is started again so that the turntable 24 rotates at the maximum rated speed, and at the same time, the external device is started. In this state, the weight measurement of the empty container sample is performed. That is, empty container samples are sequentially set in the units 14, 14,... Via the carry-in conveyor 50 and the carry-in star wheel 52. The raw load data Wy [n] of each unit 14, 14,... When the empty container sample is set in this way is sequentially collected by the controller 36. In other words, for each unit 14, the weight Wq ′ of the empty container sample, the initial load Wi [n] , and the maximum error load We [n] (= We1) due to the empty container sample are set as the load Wy [n]. Raw load data Wy [n] when [n] + We2 [n]) is applied is collected in the controller 36. This raw load data Wy [n] is temporarily stored in the memory 372 as an operating space container sample weight value Wrd [n]. The empty container samples set in the units 14, 14,... Are sequentially removed from the units 14, 14,. It is conveyed.

This is followed by the weight measurement of the halfway sample during operation. That is, in the state where the turntable 24 is rotating at the maximum rated speed, the in-fill product samples are sequentially set in the units 14, 14,... Via the carry-in conveyor 50 and the carry-in star wheel 52. And the raw load data Wy [n] of each unit 14, 14,... When the in-fill product sample is set in this way is sequentially collected by the controller. In other words, for each unit 14, as the load Wy [n], the weight (Wq ′ + Wb [n]) of the in-fill product sample, the initial load Wi [n] , and the maximum error due to the in-fill product sample Raw load data Wy [n] when the load We [n] (= We1 [n] + We2 [n]) is applied is collected by the controller 36. This raw load data Wy [n] is temporarily stored in the memory 372 as the in-operation filling sample weight value Wbd [n]. In addition, in the same way as the above-mentioned empty container sample, each of the units 14, 14,... Set in each unit 14, 14,. Are sequentially removed and conveyed to the carry-out conveyor 56.

Subsequently, the weight of the filled product sample during operation is measured. That is, in the state where the turntable 24 is rotating at the maximum rated rotation speed, the filling completion product samples are sequentially set in the units 14, 14,... Via the carry-in conveyor 50 and the carry-in star wheel 52. And the raw load data Wy [n] of each unit 14, 14,... When the filling completion product sample is set in this way is sequentially collected by the controller 36. In other words, for each unit 14, as the load Wy [n], the weight (Wq ′ + Wt) of the filled product sample, the initial load Wi [n] , and the maximum error load component We due to the filled product sample. Raw load data Wy [n] when [n] is applied is collected by the controller 36. This raw load data Wy [n] is temporarily stored in the memory 372 as the in-operation filled completion product sample weight value Wfd [n]. In addition, after filling end sample Pe set in each unit 14, 14,... Also passes through end position Pe, it is sequentially removed from each unit 14, 14,. To 56. When the weight measurement of the filled product sample is completed, the motor 34 and the external device are stopped.

  Thus, the stationary zero measurement value Wzs [n], the operational zero measurement value Wzd [n], the stationary empty container sample weight value Wrs [n], and the stationary filling sample weight value Wbs for each unit 14. [N], stationary filling sample weight value Wfs [n], operating empty container sample weight value Wrd [n], operating filling intermediate product weight value Wbd [n], and operating filling completed product sample weight value Wfd After [n] is collected by the controller 36, the coefficients a [n], b [n], c [n] and d [n] for each unit 14 are obtained in the controller 36.

  That is, the deviation of the operating zero measurement value Wzd [n] from the stationary zero measurement value Wzs [n] is expressed by the following Expression 45 from the above Expression 37.

  When the equation 45 is transformed, the coefficient a [n] in the equation 38 is expressed by the following equation 46.

  In Equation 46, the stationary zero measurement value Wzs [n] and the working zero measurement value Wzd [n] are both known numbers (stored in the memory 202). The moving speed Vmax can be detected from the output pulses of the encoders 38 and 40 as described above. Therefore, the coefficient a [n] is obtained based on this equation 46.

  On the other hand, the deviation of the operating space container sample weight value Wrd [n] from the stationary space container sample weight value Wrs [n] is expressed by the following Expression 47 from the above Expression 39.

  Then, by transforming the equation 47, the coefficient b [n] in the above equation 40 is expressed by the following equation 48.

  In this equation 48, the stationary space container sample weight value Wrs [n] and the working space container sample weight value Wrd [n] are both known numbers. The moving speed Vmax can be detected from the output pulses of the encoders 38 and 40. Therefore, the coefficient b [n] is obtained based on this formula 48.

  Further, the deviation of the in-operation filling sample weight value Wbd [n] with respect to the stationary filling sample weight value Wbs [n] is expressed by the following equation 49 from the above equation 41.

  When this equation 49 is transformed, the coefficient c [n] in the above equation 42 is expressed by the following equation 50.

  In this Formula 50, the stationary filling sample weight value Wbs [n] and the working filling sample weight value Wbd [n] are both known numbers, and the moving speed Vmax is determined by the encoders 38 and 40. It can be detected from the output pulse. Therefore, the coefficient c [n] is obtained based on this formula 50.

  Further, the deviation of the in-operation filling completion product sample weight value Wfd [n] with respect to the stationary filling completion product sample weight value Wfs [n] is expressed by the following equation 51 from the above equation 43.

  When this equation 51 is transformed, the coefficient d [n] in the above equation 44 is expressed by the following equation 52.

  In this equation 52, both the stationary filling sample weight value Wfs [n] and the operation filling completed sample weight value Wfd [n] are both known numbers, and the moving speed Vmax is determined by the encoders 38 and 40. It can be detected from the output pulse. Therefore, the coefficient d [n] is obtained based on this equation 52.

  The coefficients a [n], b [n], c [n] and d [n] for each unit 14 obtained in this way are stored in the coefficient list 374 in the memory 372. Specifically, as shown in FIG. 28, the coefficient list 374 includes a plurality of storage areas (“TYPE_X (X = 1, 2,...)” In FIG. 28 corresponding to a plurality of types (models) of containers 12. A vertical column region divided for each) is provided, and each coefficient a [n], b [n], c [n] is stored for each type of the container 12. Note that the coefficient a [n] has the same value regardless of the type of the container 12 if the unit 14 is the same. Although not described in detail here, the contents of the coefficient list 374 can be arbitrarily edited (added, changed, and deleted) also in the second embodiment.

  In the adjustment mode, as in the first embodiment described above, various parameters are input, and the adjustment mode ends with the input of all parameters. And after completion | finish of adjustment mode, an actual filling operation | work is performed in operation mode similarly to 1st Embodiment. However, in the first embodiment described above, in the operation mode, in response to the input of the type of the container 12 by the operation key 368, the coefficients A [n] and B [n] corresponding to the type are read from the coefficient list 374. In this second embodiment, the coefficients a [n], b [n], c [n] and b [n] corresponding to the model are read. And sent to each unit 14, 14,...

  In the second embodiment, the CPU 360 on the controller 36 side and the CPU 194 of each unit 14 operate as follows.

  That is, when the adjustment mode is selected by operating the operation key 368, the CPU 360 on the controller 36 side executes the adjustment mode task shown in FIGS. First, the CPU 360 executes Step S501 of FIG. 29 to Step S549 of FIG. 30 to acquire the stationary zero measurement value Wzs [n] and the operation zero measurement value Wzd [n] for each unit 14. . Note that the processes in steps S501 to S549 are exactly the same as the processes in steps S101 to S149 in FIG. 11 described above. Therefore, detailed description of these steps S501 to S549 is omitted here.

  Subsequently, the CPU 360 executes Steps S551 to S571 in FIG. 31 in order to obtain the stationary space-time container sample weight value Wrs [n]. Since these steps S551 to S571 are obtained by replacing “Wps [n]” with “Wrs [n]” in steps S151 to S171 of FIG. Detailed explanation is omitted. However, in step S151 to step S181 (particularly step S155) in FIG. 13, a product sample (or reference sample) is set in each unit 14, whereas in step S551 to step S571 in FIG. In S555), empty container samples are set in the respective units 14.

  Further, the CPU 360 executes Steps S573 to S593 in FIG. 32 in order to obtain the stationary filling sample weight value Wbs [n]. Note that these steps S573 to S593 are also obtained by replacing “Wps [n]” with “Wbs [n]” in steps S151 to S171 in FIG. Description is omitted. In addition, in these steps S573 to S593 (particularly step S577), an intermediate product sample is set in each unit 14.

  Further, the CPU 360 executes Steps S595 to S615 of FIG. 33 in order to obtain the stationary filling finished product sample weight value Wfs [n]. Note that these steps S595 to S615 are also obtained by replacing “Wps [n]” with “Wfs [n]” in steps S151 to S171 in FIG. Description is omitted. Further, in these step S595 to step S615 (particularly step S599), a filled finished product sample is set in each unit 14.

  Next, the CPU 360 executes Steps S617 to S643 of FIG. 34 in order to acquire the operating space container sample weight value Wrd [n]. Note that these steps S617 to S643 are obtained by replacing “Wpd1 [n]” with “Wrd [n]” in steps S173 to S199 of FIG. Detailed description of is omitted. However, in step S173 to step S199 (particularly step S181) in FIG. 14, a product sample is set in each unit 14, whereas in step S617 to step S643 (particularly step S625) in FIG. In each unit 14, an empty container sample is set. Further, in step S191 in FIG. 14, the threshold value Wk is applied as a comparison target of the raw load data Wy [n], whereas in step S635 in FIG. 34, a threshold value Wrk different from the threshold value Wk is set. Applied. Specifically, the threshold value Wrk is set to a value larger than “0” and smaller than the weight Wq ′ of the empty container sample (strictly, the minimum value expected as the weight Wq ′). Specifically, a value of about 1/3 to 1/2 of the weight Wq ′ (minimum value) is set.

  And CPU360 performs step S645-step S667 of FIG. 35 in order to acquire the in-operation filling intermediate product sample weight value Wbd [n]. Since these steps S645 to S667 are obtained by replacing “Wpd2 [n]” with “Wbd [n]” in steps S201 to S223 of FIG. Detailed description of is omitted. However, in steps S201 to S223 (particularly step S205) of FIG. 15, the reference sample is set in each unit 14, whereas in steps S645 to S667 (particularly step S649) of FIG. In each unit 14, a sample in the middle of filling is set. Further, in step S215 in FIG. 15, the threshold value Wk is applied as a comparison target of the raw load data Wy [n], whereas in step S659 in FIG. 35, a threshold value Wbk different from the threshold value Wk is set. Applied. Specifically, the threshold value Wbk is greater than “0” and the weight Wq ′ + Wb [n] of the sample in the middle of filling (strictly, the minimum value expected as the weight Wq ′ + Wb [n]) A smaller value is set, and more specifically, a value of about 1/3 to 1/2 of the weight Wq ′ + Wb [n] (minimum value) is set.

  Further, the CPU 360 executes Steps S669 to S691 in FIG. 36 in order to obtain the in-operation filled finished product sample weight value Wfd [n]. Note that these steps S669 to S691 are also obtained by replacing “Wpd2 [n]” with “Wfd [n]” in steps S201 to S223 of FIG. Detailed explanation about is omitted. Further, in these step S669 to step S691 (particularly step S673), a filling completion product sample is set in each unit 14. In step S683, a threshold value Wfk is applied as a comparison target of the raw load data Wy [n]. The threshold value Wbk is greater than “0” and the weight Wq ′ + Wt of the filled product sample (strictly, A value smaller than the minimum value expected as the weight Wq ′ + Wt is set, and more specifically, a value about 1/3 to 1/2 of the weight Wq ′ + Wt (minimum value) is set. The

  When it is determined in step S691 that the measurement of the in-operation filled finished product sample weight value Wpd2 [n] has been completed for all units 14, 14,..., The CPU 360 proceeds to step S693. In step S693, the motor 34 and the external device are stopped, and the process proceeds to step S695 in FIG.

  In step S695, the CPU 360 calculates the coefficients a [n], b [n], c [n], and d [n] for each unit 14 in the manner described above. Specifically, these coefficients a [n], b [n], c [n], and d [n] are calculated based on Equations 46, 48, 50, and 52. The calculated coefficients a [n], b [n], c [n], and d [n] are stored in the coefficient list 374.

  After execution of step S695, the CPU 360 executes steps S697 to S707 in order to take in the parameters described above. Since the processing from step S697 to step S707 is the same as the processing from step S229 to step S239 in FIG. 16 described above, detailed description of step S697 to step S707 will be omitted. Then, the execution of step S707 ends the series of adjustment mode tasks.

  On the other hand, the CPU 194 on each unit 14 side executes a pair adjustment mode task similar to that in FIG. 17 described above in the adjustment mode. Therefore, a detailed description of this pair adjustment mode task is omitted here.

  When the operation mode is selected, the CPU 360 on the controller 36 side executes the operation mode task similar to that in FIGS. 18 and 19 described above. Detailed description of this operation mode task is also omitted. In this operation mode task, the same timing control task as in FIG. 20 and the data acquisition task as in FIG. 21 are also executed.

  On the other hand, the CPU 194 on each unit 14 side executes the anti-operation mode task shown in FIG. 38 in the operation mode. That is, first, in step S711, the controller 36 waits for the coefficients a [n], b [n], c [n], and d [n] (specifically, data representing them) to be sent. When these coefficients a [n], b [n], c [n], and d [n] are received, the process proceeds to step S713, and the received coefficients a [n], b [n], c [n]. And d [n] are stored in the memory 202.

  Further, the CPU 194 waits for a parameter (validated parameter) to be sent from the controller 36 in step S715. When the parameter is received, the process proceeds to step S717. After the received parameter is stored in the memory 202, the process proceeds to step S719.

  In step S719, the CPU 194 calculates the above-described threshold value Wb [n] ′ based on the following equation 53. Then, the calculated threshold value Wb [n] ′ is stored in the memory 202.

  After execution of step S719, the CPU 194 executes steps S721 to S739. Since the processes in steps S721 to S739 are the same as the processes in steps S359 to S377 in FIG. 22 described above, detailed description of steps S721 to S739 is omitted. However, in the error calculation formula switching task started in step S723, the following processing is executed.

  That is, referring to FIG. 39, in the error calculation formula switching task, first, in step S741, CPU 194 determines whether or not itself (strictly, unit 14 having CPU 194) has reached zero point measurement start position Pz. Judging. If it is determined that the zero point measurement start position Pz has been reached, the process proceeds to step S743, and the zero point measurement error calculation formula expressed by the above-described equation 38 is validated.

  After execution of step S743, the CPU 194 proceeds to step S745 to determine whether or not the CPU 194 has reached the tare measurement start position Pr [n]. Then, when reaching the tare measurement start position Pr, the process proceeds to step S747, and this time, the error calculation formula for the tare measurement expressed by the above-described equation 40 is validated. And after execution of this step S747, it progresses to step S749.

  In step S749, the CPU 194 determines whether or not the current filling weight of the beverage has reached the above-described threshold value Wb [n] ′. This determination is made based on whether or not the following formula 54 is established.

  Then, when the current filling weight of the beverage reaches the threshold value Wb [n] ', the process proceeds to step S751, and the error calculation formula for stopping the supply expressed by the above-described formula 42 is validated. And after execution of this step S751, it progresses to step S753 further.

  In step S753, the CPU 194 determines whether or not the current filling weight of the beverage has reached the supply stop weight Wb [n]. That is, it is determined whether or not the above equation 5 is established. When Formula 5 is established, the process proceeds to step S755, where the timer for measuring the predetermined time Tw 'described above is reset and immediately started, and then the process proceeds to step S757.

  In step S757, the CPU 194 determines whether or not a predetermined time Tw ′ has elapsed. Then, when the predetermined time Tw ′ has elapsed, the process proceeds to step S759, and the error calculation formula for the final measurement expressed by the above equation 44 is validated. And after execution of this step S759, it returns to step S741.

  Note that the correction task started in step S725 in FIG. 38 (anti-operation mode task) is the same as that shown in FIG. 24 described above, and a detailed description thereof will be omitted here. Also, the filling task started in step S727 in FIG. 38 is the same as that shown in FIGS. 25 and 26 described above, and detailed description thereof will be omitted.

  Thus, according to the second embodiment, at the time of zero point measurement, tare measurement, when beverage supply is stopped, and when final measurement is required, it is necessary to accurately determine the true load Wy [n] ′. The error correction is performed based on the coefficients a [n], b [n], c [n], and d [n] suitable for each. This error correction target includes not only the error component We2 [n] due to the vertical component force Fc [n] ′ of the centrifugal force Fc [n] but also the error component We1 [n] due to the shape of the container 12. included. Therefore, unlike the above-described prior art, accurate error correction can always be performed regardless of the shape of the container 12, and as a result, accurate quantitative filling can always be performed.

  In the second embodiment, error correction is performed even at the time of tare measurement, but it is not necessary to determine whether or not the containers 12 set in the respective units 14 are in compliance with the standard. Alternatively, error correction at the time of the tare measurement may be omitted.

  Each of the flowcharts shown in FIGS. 29 to 39 is merely an example, and other procedures may be adopted as long as the same operations and effects as those described in the second embodiment can be obtained. Good.

1 is a schematic configuration diagram of a first embodiment of the present invention. It is an illustration figure for demonstrating the operation | movement of the embodiment. It is a block diagram which shows the structure of the controller in the same embodiment. It is a block diagram which shows the structure of each unit in the embodiment. It is an illustration figure which shows the structure of the load cell of the unit. It is an illustration figure for demonstrating operation | movement of the unit. It is an illustration figure for demonstrating the influence of the air resistance force which acts on the container set to the unit. It is an illustration figure for demonstrating the influence of the centrifugal force which acts on the load cell of the unit. It is an illustration figure which shows notionally the memory content of the coefficient list | wrist in FIG. FIG. 4 is an illustrative view conceptually showing stored contents of a parameter list in FIG. 3. It is a flowchart which shows the content of the adjustment mode task which CPU of the controller in the embodiment performs. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart which shows the content of the pair adjustment mode task which CPU of each unit in the embodiment performs. It is a flowchart which shows the content of the operation mode task which CPU of the controller in the embodiment performs. It is a flowchart following FIG. It is a flowchart which shows the content of the timing control task which CPU of the controller performs. It is a flowchart which shows the content of the data acquisition task which CPU of the controller performs. It is a flowchart which shows the content of the operation mode task which CPU of each unit in the embodiment performs. It is a flowchart which shows the content of the error calculation type | formula switching task which CPU of the unit performs. It is a flowchart which shows the content of the correction | amendment task which CPU of the unit performs. It is a flowchart which shows the content of the filling task which CPU of the unit performs. It is a flowchart following FIG. It is an illustration figure for demonstrating operation | movement of each unit in 2nd Embodiment of this invention. It is an illustration figure which shows notionally the memory content of the coefficient list | wrist in the embodiment. It is a flowchart which shows the content of the adjustment mode task which CPU of the controller in the embodiment performs. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart which shows the content of the pair adjustment mode task which CPU of each unit in the embodiment performs. It is a flowchart which shows the content of the error calculation type | formula switching task which CPU of the unit performs. It is an illustration figure for demonstrating the influence of the air resistance force in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rotary weight filling apparatus 12 Container 14 Unit 16 Mounting stand 18 Weighing machine 24 Turntable 180 Load cell 194 CPU
196 Correction circuit

Claims (4)

A rotary weight that includes weighing means on which a container is placed, and supplies a constant weight of an object to be measured to the container based on a weighing signal output from the weighing means while rotating the container together with the weighing means. In the filling device,
The first error component due to the vertical component of the air resistance force against the container and the second error due to the vertical component of the centrifugal force with respect to the metering means, which are included in the weighing signal and are generated when the container rotates together with the weighing means Correction means for independently correcting each of the components ,
The correction means corrects the first error component based on the first correction coefficient corresponding to the shape of the container and the moving speed of the weighing means, and the second correction according to the structural condition of the weighing means. Correcting the second error component based on the coefficient, the moving speed, and the weighing signal including the initial load component applied from the beginning to the weighing means;
The first correction coefficient and the second correction coefficient are a first value representing the second error component that is generated when the weighing means rotates when no object is placed on the weighing means. A second value representing the sum of the first error component and the second error component generated when the weighing means rotates while the predetermined product sample is placed on the weighing means, and the weighing A third value representing the second error component generated when the weighing means rotates while the predetermined reference sample is placed on the means, the moving speed, the commodity sample or the reference sample Based on the weight value,
The product sample has the same shape as the container and its weight is known,
The reference sample has a shape that does not cause the first error component and the weight thereof is the same as the weight of the commodity sample;
A rotary weight filling device. The correction means includes setting means for setting the first correction coefficient and the second correction coefficient, detection means for detecting the moving speed, and the first correction coefficient and the second correction set by the setting means. comprising a correction execution means for correcting, based on the detected the moving speed and the weight signals by the coefficient and the detection means, a rotary weight filler according to claim 1. The setting means includes storage means for storing a plurality of the first correction coefficients and a plurality of the second correction coefficients corresponding to a plurality of types of the containers, the plurality of first correction coefficients, and the plurality of second correction coefficients. Selection means for selecting a coefficient corresponding to the container placed on the weighing means from among coefficients, and setting execution means for setting the first correction coefficient and the second correction coefficient selected by the selection means; The rotary weight filling device according to claim 2 . In the rotary weight filling method of supplying a constant weight of an object to be measured to the container based on a measurement signal output from the measurement means while rotating the container together with the measurement means on which the container is placed.
The first error component due to the vertical component of the air resistance force against the container and the second error due to the vertical component of the centrifugal force with respect to the metering means, which are included in the weighing signal and are generated when the container rotates together with the weighing means A correction process for independently correcting each of the components ,
In the correction process, the first error component is corrected based on the first correction coefficient according to the shape of the container and the moving speed of the weighing means, and the second correction according to the structural condition of the weighing means. Correcting the second error component based on the coefficient, the moving speed, and the weighing signal including the initial load component applied from the beginning to the weighing means;
The first correction coefficient and the second correction coefficient are a first value representing the second error component that is generated when the weighing means rotates when no object is placed on the weighing means. A second value representing the sum of the first error component and the second error component generated when the weighing means rotates while the predetermined product sample is placed on the weighing means, and the weighing A third value representing the second error component generated when the weighing means rotates while the predetermined reference sample is placed on the means, the moving speed, the commodity sample or the reference sample Based on the weight value,
The product sample has the same shape as the container and its weight is known,
The reference sample has a shape that does not cause the first error component and the weight thereof is the same as the weight of the commodity sample;
A rotary weight filling method.

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