JP6611178B2 - Control device, combination weighing device, and combination weighing device system for combination weighing device - Google Patents

Description

  The present invention relates to a control device for a combination weighing device, a combination weighing device, and a combination weighing device system.

  2. Description of the Related Art A combination weighing device that measures the weight value of articles that are respectively input into a plurality of hoppers from the outside and performs combination weighing using the measured weight value is known. For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2000-314656) describes a target supply amount set for each hopper every time combination weighing is performed based on an actual measured weight and a preset target supply amount. Disclosed is a combination weighing device that is set using updated parameters.

  Incidentally, in recent years, attention has been focused on a control method (learning control) having a learning function for accumulating the relationship between the control contents and the execution results and improving the control contents based on the accumulated contents. For example, if the relationship between the drive time in the transport unit and the supply amount that is the execution result is stored, and the content of the transport control is improved based on the stored content, the control accuracy related to the transport of the combination weighing device can be improved. Can do.

JP 2000-314656 A

  However, even if the drive time in the transport unit is switched, the supply amount corresponding to the switched drive time is not accumulated, or the supply amount corresponding to the switched drive time is relatively small. The control accuracy related to the conveyance of the combination weighing device cannot be increased.

  An object of the present invention is to provide a control device, a combination weighing device, and a combination weighing device system for a combination weighing device that can improve control accuracy related to conveyance of the combination weighing device.

  The control device for the combination weighing device according to the present invention is stored in each of the transport unit that transports articles supplied from the outside, the plurality of hoppers that temporarily store the articles transported by the transport unit, and the hoppers. From the weighing unit that outputs the weighing value according to the mass of the article and the plurality of weighing values output by the weighing unit, the combination of the weighing values is selected so that the total value becomes the target weighing value, and the corresponding combination is selected. A control unit for a combination weighing device including a control unit that discharges an article from a hopper, and a set value related to an article feeding force in a transfer unit set in the past, and transported when the set value is set Parameters that are determined based on a plurality of history information that correlates the supply amount of articles supplied from the unit to the hopper, and that are used when determining the feed force of the transport unit. And a conveyance control unit that determines the feed force in the conveyance unit using parameters, and the conveyance control unit changes the drive time in the conveyance unit from the first set value to the second set value. When the setting is changed, (1) if the parameter determined for the second setting value is not stored in the storage unit, the parameter determined for the driving time different from the second setting value is used. (2) If the learning depth of the parameter is less than the predetermined reference value even if the parameter determined for the second set value is accumulated in the accumulation unit, the learning depth is determined. Is determined to be equal to or greater than a predetermined reference value and a parameter determined for a driving time different from the second set value is used to determine the feeding force in the transport unit.

  The control device for the combination weighing device having this configuration is suitable for a driving time different from the second set value even when the parameter corresponding to the second set value after switching is not stored in the storage unit. Since the determined parameter is used instead to determine the feeding force in the transport unit, it is possible to suppress the control related to transport from being greatly disturbed. Further, the control device for the combination weighing device having this configuration has a learning depth lower than the predetermined reference value when the learning depth is shallow even though the parameter corresponding to the second set value after switching is stored in the storage unit. Since the feed force in the transport unit is determined using a parameter determined for a drive time different from the second set value, it is possible to suppress a decrease in control accuracy related to transport. As a result, the control accuracy related to the conveyance of the combination weighing device can be improved.

  When a plurality of parameters determined for a drive time different from the second set value are stored, the transfer control unit transfers using the parameter determined for the drive time closest to the second set value. You may determine the power in a part.

  The control device for the combination weighing device can suppress a decrease in control accuracy related to conveyance even when the drive time is switched to the second set value.

  When a plurality of parameters determined for a drive time different from the second set value are accumulated, the transport control unit may determine the feed force in the transport unit using the parameter having the deepest learning depth. .

  The control device for the combination weighing device can suppress the control relating to the conveyance from being greatly disturbed even when the driving time is switched to the second set value.

  The transport control unit uses the parameter determined for the first set value immediately before switching to the second set value when a plurality of parameters determined for the drive time different from the second set value are accumulated. Then, the feeding force in the transport unit may be determined.

  This control device for the combination weighing device is particularly effective when a phenomenon occurs in which switching between the first set value and the second set value is repeated at intervals of a predetermined time or less.

  When the conveyance control unit detects that switching between the first set value and the second set value is repeated at an interval of a predetermined time or less, immediately before switching to either the first set value or the second set value. The feed force in the transport unit may be determined using a parameter determined for the set value.

  In the control device for the combination weighing device having this configuration, since the parameter to be applied is selected according to the cause, it is possible to suppress a decrease in the control accuracy related to the conveyance.

  The combination weighing device according to the present invention includes a transport unit that transports articles supplied from the outside, a plurality of hoppers that temporarily store articles transported by the transport unit, and the mass of articles stored in each of the hoppers. A combination of weighing values is selected from a weighing unit that outputs a corresponding weighing value and a plurality of weighing values output by the weighing unit so that the total value becomes a target weighing value, and an article is removed from a hopper corresponding to the combination. A control unit for discharging and a control device for the combination weighing device described above are provided.

  The combination weighing device having this configuration is a parameter determined for a driving time different from the second set value even when the parameter corresponding to the second set value after switching is not stored in the storage unit. Since the feed force in the transport unit is determined by substituting, the control related to transport can be prevented from being greatly disturbed. Further, the control device for the combination weighing device having this configuration has a learning depth lower than the predetermined reference value when the learning depth is shallow even though the parameter corresponding to the second set value after switching is stored in the storage unit. Since the feed force in the transport unit is determined using a parameter determined for a drive time different from the second set value, it is possible to suppress a decrease in control accuracy related to transport. As a result, the control accuracy related to the conveyance of the combination weighing device can be improved.

  A combination weighing device system of the present invention includes at least one combination weighing device and a control device for the combination weighing device that is communicably connected to the combination weighing device. A transport unit that transports articles to be supplied; a plurality of hoppers that temporarily store articles transported by the transport unit; and a weighing unit that outputs a measurement value corresponding to the mass of the articles stored in each of the hoppers; A control unit that selects a combination of measurement values from a plurality of measurement values output by the measurement unit so that the total value becomes a target measurement value, and discharges an article from a hopper corresponding to the combination.

  In the combination weighing device system having this configuration, even when the parameter corresponding to the second set value after switching is not stored in the storage unit, the driving time different from the second set value is determined. Since the feed force in the transport unit is determined by substituting the parameter, it is possible to prevent the control related to transport from being greatly disturbed. Further, the control device for the combination weighing device having this configuration has a learning depth lower than the predetermined reference value when the learning depth is shallow even though the parameter corresponding to the second set value after switching is stored in the storage unit. Since the feed force in the transport unit is determined using a parameter determined for a drive time different from the second set value, it is possible to suppress a decrease in control accuracy related to transport. As a result, it is possible to improve the control accuracy related to the conveyance of the combination weighing device that is communicably connected.

  According to the present invention, control accuracy can be improved.

It is a figure which shows the structure of a combination weighing device. It is a figure which shows the discharge end vicinity of a radiation feeder. It is the graph which showed the relationship between layer thickness S and supply amount W1. It is a figure which shows the relationship of setting information, such as power feeding for every operation time, layer thickness, and an actual supply amount. It is a figure which shows an example of the table structure of log | history information. It is a figure which shows typically the structure of the combination weighing | measuring device which concerns on other embodiment.

  Hereinafter, an embodiment will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The dimensional ratios in the drawings do not necessarily match those described.

  As shown in FIG. 1, the combination weighing device 1 includes an input chute 2, a dispersion feeder 3, a plurality of radiation feeders (conveying units) 4, distance measuring sensors 45, a plurality of pool hoppers 5, and a plurality of A weighing hopper (hopper) 6, a plurality of booster hoppers (hoppers) 7, a collecting chute 8, a timing hopper 9, a weighing unit 11, and a control device (a control device for a combination weighing device) 20 are provided. The combination weighing device 1 measures the article A supplied by the conveyor 50 so as to have a target measurement value, and supplies it to the bag making and packaging machine 60. Here, the article A is an article having a variation in unit mass, such as agricultural products, marine products, processed foods, and the like. The bag making and packaging machine 60 packs the article A supplied by being measured by the combination weighing device 1 while forming the film into a bag having a predetermined capacity.

  The input chute 2 is disposed below the transport end 50 a of the transport conveyor 50. The input chute 2 receives the article A dropped from the transport end 50a of the transport conveyor 50 and discharges it downward.

  The dispersion feeder 3 is disposed below the charging chute 2. The dispersion feeder 3 has a conical conveying surface 3a that spreads downward toward the bottom. The dispersion feeder 3 vibrates the conveyance surface 3a. By this action, the dispersion feeder 3 uniformly conveys the article A discharged from the charging chute 2 to the top of the conveying surface 3a toward the outer edge of the conveying surface 3a.

  The plurality of radial feeders 4 are arranged radially along the outer edge of the conveying surface 3 a of the dispersion feeder 3. Each radiating feeder 4 has a trough 4a extending outward from below the outer edge of the transport surface 3a. Each radiation feeder 4 vibrates the trough 4a to convey the article A discharged from the outer edge of the conveying surface 3a toward the tip of the trough 4a.

  Above each radiation feeder 4, a distance measuring sensor 45 is arranged corresponding to each radiation feeder 4. The distance measuring sensor 45 detects the distance between the distance measuring sensor 45 and the article A on the radiation feeder 4. The distance measuring sensor 45 obtains the distance between the distance measuring sensor 45 and the article A by, for example, irradiating light toward the article A and receiving the light reflected by the article A. As shown in FIG. 2, the distance measuring sensor 45 detects the distance to the article A located near the discharge end of the radiation feeder 4. The distance measuring sensor 45 outputs a detection signal indicating the detected distance to the article A to the control device 20. In the control device 20, the layer thickness S of the article A is converted based on the difference between the distance from the bottom surface of the trough 4 a of the radiation feeder 4 to the distance measuring sensor 45 and the distance indicated by the detection signal.

  Each pool hopper 5 is disposed below the tip of the trough 4a of each radiation feeder 4. Each pool hopper 5 has a gate 5a that can be opened and closed with respect to its bottom. Each pool hopper 5 temporarily stores the articles A discharged from the tip of the corresponding trough 4a by closing the gate 5a. Further, each pool hopper 5 opens the gate 5a to discharge the temporarily stored article A downward.

  Each weighing hopper 6 is disposed below the gate 5 a of each pool hopper 5. Each weighing hopper 6 has a gate 6a and a gate 6b that can be opened and closed with respect to the bottom. Each weighing hopper 6 temporarily stores articles A discharged from the corresponding pool hopper 5 with the gates 6a and 6b closed, and temporarily stores them by opening the gates 6a or 6b. Article A is discharged downward.

  Each booster hopper 7 is disposed below the gate 6 a of each weighing hopper 6. Each booster hopper 7 has a gate 7a that can be opened and closed with respect to its bottom. Each booster hopper 7 temporarily stores the articles A discharged from the gate 6a side of the corresponding weighing hopper 6 by closing the gate 7a. Further, each booster hopper 7 opens the gate 7a to discharge the temporarily stored article A downward.

  The collecting chute 8 is formed in a cylindrical shape having an inner surface 8a of a truncated cone that tapers downward. The collecting chute 8 is arranged so that the inner surface 8 a is positioned below all the weighing hoppers 6 and all the booster hoppers 7. The collecting chute 8 receives the article A discharged from the gate 6b side of each weighing hopper 6 and the article A discharged from each booster hopper 7 by the inner surface 8a and discharges it downward.

  The timing hopper 9 is disposed below the collective chute 8. The timing hopper 9 has a gate 9a that can be opened and closed with respect to its bottom. The timing hopper 9 temporarily stores the articles A discharged from the collective chute 8 with the gate 9a closed, and opens the gate 9a so that the temporarily stored articles A are stored in the bag making and packaging machine 60. Discharge.

  The charging chute 2, the dispersion feeder 3, the plurality of radiation feeders 4, the plurality of pool hoppers 5, and the plurality of weighing hoppers 6 are directly or indirectly supported by the case 13. The distance measuring sensor 45, the plurality of booster hoppers 7, the collective chute 8 and the timing hopper 9 are directly or indirectly supported by the frame 12.

  The measuring unit 11 is disposed in a case 13 supported by the frame 12. The weighing unit 11 has a plurality of load cells 11a. Each load cell 11a supports a corresponding weighing hopper 6. When the article A is temporarily stored in each weighing hopper 6, the weighing unit 11 measures a measurement value corresponding to the mass of the article A.

  The control device 20 is disposed in the case 13. The control device 20 includes a control unit (transport control unit) 20A and a storage unit 20B including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The control unit 20A controls the operation of each unit of the combination weighing device 1. Specifically, the control unit 20A performs the conveying operation of the dispersion feeder 3 and the radiation feeder 4, the opening / closing operation of the gate 5a of each pool hopper 5, the opening / closing operation of the gate 6a and gate 6b of each weighing hopper 6, and the gate of each booster hopper 7. The opening / closing operation of 7a and the opening / closing operation of the gate 9a of each timing hopper 9 are controlled.

  The control unit 20A stores the measurement value measured by the measurement unit 11 and the measurement hopper 6 and / or the booster hopper 7 in which the article A corresponding to the measurement value is stored. Specifically, when the article A measured by the weighing unit 11 is stored in the weighing hopper 6, the control unit 20A stores the measured value measured by the measuring unit 11 and the article A corresponding to the measured value. The weighing hopper 6 to be associated is stored in association with each other. When the article A weighed by the weighing unit 11 is discharged to the booster hopper 7 corresponding to the weighing hopper 6, the control unit 20 </ b> A displays the weighing value of the article A weighed by the weighing unit 11 and the weighing hopper 6. Corresponding booster hoppers 7 are stored in association with each other.

  The control unit 20A selects a combination of measurement values from the plurality of measurement values measured by the measurement unit 11 and associated with the measurement hopper 6 and / or the booster hopper 7 so that the total value becomes the target measurement value. Specifically, the control unit 20A selects a combination of measurement values from a plurality of measurement values output by the measurement unit 11 so that the total value falls within a predetermined range having the target measurement value as a lower limit value. Then, the control unit 20A discharges the article A from the weighing hopper 6 and / or the booster hopper 7 corresponding to the combination.

  The combination weighing device 1 is set with parameters for controlling these operations. The parameter includes a learning parameter used when determining the feeding force of the radiation feeder (conveying unit) 4. The learning parameters include, for example, the feed force P, the layer thickness S, and the actual supply amount W1 among the setting information related to the supply operation of the article A applied to the combination weighing device 1 to the pool hopper (hopper) 5 in the past. Is determined based on a plurality of pieces of history information associated with each operation time (drive time) t in which the radiation feeder 4 operates. Here, the setting information means a setting value set in the past in the combination weighing device 1.

  FIG. 5 is an example of a table showing the configuration of a plurality of history information. The history information is stored for each operation time t in a state in which a plurality of setting information (for example, feeding force P, layer thickness S, and actual supply amount W1) are associated with each other. The setting information in the above is not limited to the above configuration, and may include information such as an operation time for which the distributed feeder 3 operates and / or an operation intensity of the distributed feeder 3. A detailed method for determining learning parameters will be described later.

  The history information is stored in the storage unit 20B that is arranged in the case 13 and can communicate with the control unit 20A. An example of the storage unit 20B is an mSATA standard SSD (Solid State Drive) or a hard disk.

  The control unit 20A uses the feed force P determined at least according to the learning parameter, the target supply amount W of the article A set for the pool hopper 5 (the weighing hopper 6), and the operation time t. Thus, the radiation feeder 4 is controlled. The conveyance control will be described in detail.

As shown in FIG. 3, as the layer thickness S increases, the supply amount W1 supplied to the pool hopper 5 (the weighing hopper 6) tends to increase. Therefore, the control unit 20A controls the feeding force P of the radiation feeder 4 according to the change in the layer thickness S (see FIG. 2) of the article A on the trough 4a acquired by the distance measuring sensor 45. More specifically, the control unit 20A has the following equation (1) that is the relationship between the layer thickness S of the article A, the target supply amount W of the radiation feeder 4 and the feeding force P of the radiation feeder 4 for each operation time t. ) To control the feed force P of the radiation feeder 4.
P = B × W / S + C (1)

  The operation time t is a duration time during which the radiation feeder 4 is operating when a single signal is input in order to actually convey the article. The feeding force P is the amplitude of vibration of the radiation feeder 4. When the value of the feeding force P is small, the amplitude is small. Therefore, the supply amount W1 of the article A supplied from the radiation feeder 4 to the weighing hopper 6 (pool hopper 5) is reduced. When the value of the feeding force P is large, the amplitude becomes large. Therefore, the supply amount W1 of the article A supplied from the radiation feeder 4 to the weighing hopper 6 increases. As shown in FIG. 2, the layer thickness S is the distance between the bottom surface of the trough 4 a of the radiation feeder 4 and the upper part of the article A in the vicinity of the discharge end of the radiation feeder 4. The supply amount W1 is the amount of the article A supplied from the radiation feeder 4 to the weighing hopper 6 via the pool hopper 5.

  In the above formula (1), “B” and “C” are coefficients and are the learning parameters. As for the coefficient B and the coefficient C, in the initial state of the combination weighing device 1, for example, values obtained empirically according to the configuration of the combination weighing device 1 are given as initial values. The coefficient B and the coefficient C are values that can be changed according to the shape of the radiation feeder 4 and / or the type of the article A.

  The control unit 20A updates the coefficient B and the coefficient C by statistical learning control. Specifically, the control unit 20A continuously obtains from the past and accumulates the coefficient B and the coefficient C on the basis of the information on the layer thickness S, the supply amount W1, the power supply P, and the operation time t accumulated in the accumulation unit 20B. Are calculated sequentially. Here, the coefficient B and the coefficient C are change trends generated based on setting information set in the past in the device itself. The control unit 20A accumulates history information including at least the actual supply amount W1 when the feed force P is controlled according to the layer thickness S so as to be a predetermined target supply amount W together with the operation time t. Store in 20B. In this case, the control unit 20A causes the accumulation unit 20B to accumulate the layer thickness S, the actual supply amount W1, the feed force P, and the operation time t included in the history information. The control unit 20A updates the coefficient B and the coefficient C based on such history information. The latest coefficient B and coefficient C may be stored in the storage unit 20B as well as temporarily stored in the RAM or the like of the control unit 20A and used for transport control.

  Based on the plurality of history information stored in this way, the control unit 20A calculates a coefficient B and a coefficient C that are learning parameters. In this case, the control unit 20A calculates the coefficient B and the coefficient C on the assumption that the relationship shown in the above formula (1) is established with respect to the layer thickness S, the supply amount W1, and the feeding force P. Specifically, the control unit 20A derives a new coefficient B and coefficient C by, for example, the least square method based on the history information acquired so far for each operation time t of the radiation feeder 4. In addition, when deriving new coefficients B and C, weights (magnitude of influence when determining new coefficients B and C) can be set for individual history information. For example, for information close to the current time, the weight is high. The coefficient B and the coefficient C are used when determining the current or future power P.

  Next, the conveyance control in the control unit 20A when the operation time t of the radiation feeder 4 is switched from t1 (first set value) to t2 (second set value) will be described with reference to FIG. When the control unit 20A detects that the operation time t has been switched from t1 to t2, the control unit 20A calculates the coefficient B and the coefficient C at t2 based on the history information stored in the storage unit 20B. The coefficient B and the coefficient C may be the latest values calculated in advance and stored in the storage unit 20B. Here, it is assumed that the layer thickness S, the actual supply amount W1, and the feed force P associated with t2 are not accumulated in the accumulation unit 20B. That is, the conveyance control when the control unit 20A detects that it has never been operated at t2 in the past and has been switched to t2 for the first time will be described.

  In such a case, the control unit 20A determines the feed force P in the radiation feeder 4 using the coefficient B and the coefficient C, which are parameters determined for an operation time different from t2. When a plurality of parameters determined for an operation time t different from t2 are accumulated, for which operation time t the coefficient B and the coefficient C determined are used are determined by the following method, for example. it can.

(1) Use parameter determined for operation time t closest to operation time after switching For example, control unit 20A uses coefficient B and coefficient C determined for operation time t closest to t2. Thus, the feeding force P in the radiation feeder 4 can be determined. For example, the control unit 20A determines the feed force P in the radiation feeder 4 using the coefficient B and the coefficient C determined for t3 closest to t2 after switching.

(2) Using the parameter with the deepest learning depth Further, for example, the control unit 20A can determine the transmission force in the radiation feeder 4 using the coefficient B and the coefficient C with the deepest learning depth. The depth of learning depth can be defined as the large number of history information as shown in FIG. That is, the learning depth is deeper as the coefficient B and the coefficient C determined based on much history information. Since the coefficient B and the coefficient C are determined in consideration of more history information, it means that it is possible to realize transport control that matches the actual situation. Based on this viewpoint, it can be said that the coefficient B and the coefficient C determined for t1, t3, and t4 are higher in the learning depth of the coefficient B and the coefficient C determined for t3. Therefore, when the control unit 20A is switched from t1 to t2, the control unit 20A determines the feeding force P in the radiation feeder 4 by using the coefficient B and the coefficient C determined for t3.

  In addition to the above definition, the learning depth may be defined as the learning depth being deeper as the degree of variation in the history information is larger, or the learning depth is defined as the operation rate corresponding to the history information is higher. May be. In addition, an operation rate means the ratio of the frequency | count that the combination measurement was established in the frequency | count that the combination measurement was performed.

(3) Using parameters determined for operation time immediately before switching The control unit 20A, for example, uses the coefficient B determined for the operation time (first set value) t immediately before the operation time t is switched. And the feeding force in the radiation feeder 4 can be determined using the coefficient C. For example, the control unit 20A determines the feeding force P in the radiation feeder 4 using the coefficient B and the coefficient C determined for t1 before switching to t2.

  Here, for example, when the control unit 20A detects that the switching between the operation time t1 (first set value) and t2 (second set value) is repeated at an interval of a predetermined time or less, t1 and The feed force P in the radiation feeder 4 may be determined using a parameter determined for the set value immediately before switching to any one of t2. When learning is not performed at t2, when switching of the operation time between t1 and t2 is repeated, the learning at t2 is not deepened for a longer time than when the operation time is operated only by t2. The accuracy will be degraded. Such control can avoid the above-described phenomenon that the accuracy is deteriorated, and thus is particularly effective when a phenomenon occurs in which the switching between the operation time t1 and t2 is repeated at intervals of a predetermined time or less. .

  You may combine the method of said (1)-(3) suitably. For example, when there are a plurality of coefficients B and C determined for the operation time t closest to the operation time after switching, the coefficient B and coefficient C having the highest learning depth among them are adopted, or the switching is performed. The coefficient B and the coefficient C of the previous operation time may be adopted.

  In addition, the control unit 20A determines that the learning depth of the coefficient B and the coefficient C is less than a predetermined reference value even though the coefficient B and the coefficient C determined for the operation time after switching are stored in the storage unit 20B. The feed force P in the radiation feeder 4 may be determined using the coefficient B and the coefficient C determined for the operation time different from the operation time after switching, where the learning depth is equal to or greater than a predetermined reference value.

  For example, when the control unit 20A detects that the operation time has been changed from t1 to t3, when the number of history information associated with t3, which is the operation time after switching, is equal to or greater than a predetermined reference value, The feeding force P in the radiation feeder 4 is determined using the coefficient B and the coefficient C determined in this way. In addition, for example, when the control unit 20A detects that the operation time has been changed from t1 to t4, when the number of history information associated with t4 that is the operation time after switching is less than a predetermined reference value, t4 The feed force P in the radiation feeder 4 is not determined by using the coefficient B and the coefficient C determined for. In this case, for example, the feeding force P in the radiation feeder 4 is determined using the coefficient B and the coefficient C determined for t1 immediately before switching.

  As described above, the combination weighing device 1 of the above embodiment has the operation time after switching even when the coefficient B and the coefficient C corresponding to the operation time after switching are not stored in the storage unit 20B. Since the feed force P in the radiation feeder 4 is determined by substituting the coefficient B and the coefficient C determined for the operation time different from the above, it is possible to suppress the control relating to the conveyance from being greatly disturbed. In the combination weighing device 1 of the above embodiment, when the learning depth is shallow even though the coefficient B and the coefficient C corresponding to the operation time after switching are stored in the storage unit 20B, the learning depth is the predetermined reference value. Since the feed force P in the radiation feeder 4 is determined using the coefficient B and the coefficient C determined for an operation time that is higher than the operation time after switching, the control accuracy related to the conveyance is reduced. This can be suppressed. As a result, the control accuracy related to the conveyance of the combination weighing device 1 can be improved.

  Although one embodiment has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention.

  For example, in the control device for the combination weighing device of the present invention, all or a part of the functions of the control unit 20A included in the combination weighing device 1 and the storage unit 20B are combined as shown in FIG. 1 may be configured as a management server 80 independent of the management server 80. In the combination weighing device system 100 in which the management server 80 and one or a plurality of combination weighing devices 1 are connected to each other via a wired or wireless LAN (Local Area Network) 70 so as to be communicable with each other, the combination weighing of the above embodiment is performed. All or some of the functions of the device 1 are provided via the LAN 70. The management server 80 will be described. The management server 80 mainly includes a display (not shown), a communication unit 81, a transport control unit 82, and a storage unit 83.

  The communication unit 81 enables communication with one or a plurality of combination weighing devices 1. The communication unit 81 is, for example, a LAN interface. The conveyance control unit 82 is a device that controls parameters related to combination weighing set in the plurality of combination weighing devices 1, and executes all or part of the functions of the control unit 20 </ b> A included in the combination weighing device 1. The transport control unit 82 includes a CPU (Central Processing Unit), a ROM (Read Only Memory) and a RAM (Random Access Memory) as a main storage device, and a hard disk or an mSATA standard SSD (Solid State Drive) as an auxiliary storage device. ) Etc. The storage unit 83 can communicate with the transport control unit 82 and is an mSATA standard SSD (Solid State Drive), a hard disk, or the like.

  Also in the combination weighing device system 100 described above, the conveyance control unit 82 of the management server 80 executes conveyance control in each combination weighing device 1. Also in each combination weighing device 1 in which the conveyance control is executed by the conveyance control unit 82, the control accuracy related to the conveyance of the combination weighing device 1 of the above embodiment can be improved.

  In the above embodiment, the optical distance measuring sensor 45 is described as an example of the means for acquiring the layer thickness S. However, for example, a load cell or a camera installed in the radiation feeder 4 may be used. The combination weighing device 1 of the above embodiment only needs to include an interface (acquisition unit) that can acquire information from these means.

  In the above-described embodiment or modification, an example in which one distance measuring sensor 45 is provided corresponding to each radiation feeder 4 has been described as an example. However, the distance measuring sensor 45 extends along the conveyance direction of the radiation feeder 4. A plurality of them may be provided. Thereby, the layer thickness S of the article A at a plurality of locations can be detected. Therefore, the radiation feeder 4 can be controlled based on the overall state of the article A conveyed by the radiation feeder 4.

  In the said embodiment or modification, although the several radiation feeder 4 mentioned above was mentioned and demonstrated as an example of a conveyance part, it is not limited to this, It has the structure which can convey the articles | goods A besides the dispersion | distribution feeder 3. I just need it. For example, a coil unit (screw) that can be rotationally driven or a belt conveyor may be disposed. In the case of a coil unit, the control unit 20A and the conveyance control unit 82 control the number of rotations (rpm) of the coil unit and the like as the feeding force P. In the case of a belt conveyor, the control unit 20A and the conveyance control unit 82 control the number of rotations of a roller that drives the belt.

  In the above-described embodiment or modification, as an example of a plurality of hoppers, a plurality of weighing hoppers 6 and a plurality of booster hoppers 7 arranged in an annular shape have been described as examples. However, the present invention is not limited thereto, and is arranged in a matrix. May be. Moreover, it is good also as a structure which is not provided with several booster hoppers 7 as several hoppers.

  DESCRIPTION OF SYMBOLS 1 ... Combination measuring device, 2 ... Feeding chute, 3 ... Dispersing feeder, 4 ... Radiation feeder, 5 ... Pool hopper, 6 ... Measuring hopper, 11 ... Weighing unit, 20 ... Control device, 20A ... Control unit (conveyance control unit) 20B ... accumulation unit, 80 ... management server, 81 ... communication unit, 82 ... conveyance control unit, 83 ... accumulation unit, 100 ... weighing device system, A ... article, B ... coefficient, C ... coefficient, P ... feed power, S ... layer thickness, t ... operation time, W ... target supply amount, W1 ... supply amount.

Claims (7)

A transport unit that transports articles supplied from the outside, a plurality of hoppers that temporarily store the articles transported by the transport unit, and a measurement value according to the mass of the articles stored in each of the hoppers A combination of the measurement values is selected so that a total value becomes a target measurement value, and the article from the hopper corresponding to the combination is selected from the plurality of measurement values output by the measurement unit. A control unit for a combination weighing device comprising:
A plurality of values relating a set value related to the power of the article in the transport unit set in the past and a supply amount of the article supplied from the transport unit to the hopper when the set value is set A storage unit that stores parameters for each driving time of the transport unit, parameters that are determined based on the history information, and that is used when determining the feed force of the transport unit;
A conveyance control unit that determines a feeding force in the conveyance unit using the parameter;
With
The conveyance control unit
When the driving time in the transport unit is changed from the first set value to the second set value, if the parameter determined for the second set value is not stored in the storage unit, Determining the feed force in the transport unit using the parameters determined for a drive time different from the second set value;
Even if the parameter determined for the second set value is stored in the storage unit, if the learning depth of the parameter is less than a predetermined reference value, the learning depth is not less than the predetermined reference value and the A control device for a combination weighing device that determines a feeding force in the transport unit using the parameter determined for a driving time different from a second set value.   The conveyance control unit is configured to determine the driving time that is closest to the second setting value when a plurality of the parameters determined for the driving time different from the second setting value are accumulated. The control device for the combination weighing device according to claim 1, wherein a feed force in the transport unit is determined using a parameter.   When a plurality of parameters determined for a driving time different from the second set value are accumulated, the conveyance control unit uses the parameter having the deepest learning depth to transmit power in the conveyance unit. The control device for the combination weighing device according to claim 1 or 2, wherein   The transport control unit determines the first set value immediately before switching to the second set value when a plurality of parameters determined for a drive time different from the second set value are accumulated. The control device for the combination weighing device according to any one of claims 1 to 3, wherein the feeding force in the transport unit is determined using the parameter that has been set.   When the conveyance control unit detects that the switching between the first set value and the second set value is repeated at an interval of a predetermined time or less, the first set value and the second set value The control device for a combination weighing device according to any one of claims 1 to 4, wherein the feed force in the transport unit is determined using the parameter determined with respect to the set value immediately before switching to any one of them. A transport unit for transporting articles supplied from the outside;
A plurality of hoppers for temporarily storing the articles conveyed by the conveying unit;
A weighing unit that outputs a weighing value according to the mass of the article stored in each of the hoppers;
A control unit that selects a combination of the measurement values such that a total value becomes a target measurement value from the plurality of measurement values output by the measurement unit, and discharges the article from the hopper corresponding to the combination;
A control device for the combination weighing device according to any one of claims 1 to 5;
A combination weighing device. At least one combination weighing device;
A control device for the combination weighing device according to any one of claims 1 to 5, which is communicably connected to the combination weighing device.
The combination weighing device is
A transport unit for transporting articles supplied from the outside;
A plurality of hoppers for temporarily storing the articles conveyed by the conveying unit;
A weighing unit that outputs a weighing value according to the mass of the article stored in each of the hoppers;
A control unit that selects a combination of the measurement values such that a total value becomes a target measurement value from the plurality of measurement values output by the measurement unit, and discharges the article from the hopper corresponding to the combination;
A combination weighing device system.

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