JP2017146162A - Controller for combinational measuring device, combinational measuring device and combinational measuring device system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller for a combinational measuring device, a combinational measuring device and a combinational measuring device system that achieve improvement in control accuracy.SOLUTION: A controller comprises: a control part that selects a combination of measurement values from among measurement values of respective articles retained in multiple hoppers, so that a total value becomes a target measurement value to be set preliminarily, and then emits the articles from the hoppers corresponding to the combination; and an accumulation part that accumulates multiple pieces of history information associated with first to n-th setting information in the setting information which was applied previously to the combinational measuring device with respect to an operation of supplying the article to the hopper. The control part sets a learning parameter on the basis of multiple pieces of history information, at least determines sending power in accordance with the learning parameter and the target amount of the article supplied which is set to the hopper, controls a conveying part on the basis of the determined sending power, and then varies the amount and/or the target amount of the article supplied from the outside, according to variation in the first to the n-th setting information between the history information to be accumulated in the accumulation part.SELECTED DRAWING: Figure 1

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 storing the relationship between the control content and the execution result and improving the control content based on the stored content.

JP 2000-314656 A

In general, it is important for the parameters updated by the learning control to acquire history data in various states to increase the learning depth. This is because the control accuracy can be improved if the learning depth can be increased. Therefore, when the learning control is applied to the conveyance control of the combination weighing device and the control accuracy is improved, the user needs to operate the combination weighing device in various states, for example. In other words, it is necessary to vary the set values set in the combination weighing device.
However, when the supply of articles to the combination weighing device from the outside is stable, for example, the state of the combination weighing device becomes almost constant. Therefore, even when a large amount of history data is acquired, the history data is history data that operates in the same state. That is, the set values in the combination weighing device are not varied and are collected as values. As a result, the learning depth in the learning control does not increase. Therefore, the control accuracy related to the conveyance of the combination weighing device is not improved.

  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 capable of improving control accuracy.

  The control device for the combination weighing device of 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 articles stored in the hoppers. A control unit for a combination weighing device comprising a weighing unit for weighing, wherein the weighing value is set so that a total value becomes a preset target weighing value from each weighing value of articles stored in a plurality of hoppers. Of the setting information on the control unit for selecting the combination and discharging the article from the hopper corresponding to the combination and the supply operation of the article applied to the combination weighing device to the hopper in the past, the first to nth settings A storage unit that stores a plurality of history information associated with the information, and the control unit sets learning parameters based on the plurality of history information, and at least the learning parameters and the hopper are set. According to the target supply amount of the article to be controlled, the conveyance unit is controlled by the determined feeding force, and the first to nth set information varies among the history information stored in the storage unit Then, the fluctuation control for changing the supply amount from the outside of the article and / or the target supply amount is executed.

  The control device for the combination weighing device having this configuration performs the first to nth accumulations stored in the accumulation unit by executing the variation control that varies the supply amount from the outside of the article and / or the target supply amount. The degree of variation of each setting information increases. For example, if the variation control is executed when each of the first to n-th setting information accumulated in the accumulation unit is small, the setting information accumulated in the accumulation unit before the variation control is performed. The degree of spread is greater than the degree of variation from each of the above. If the degree of variation of the setting information stored in the storage unit is wide, the learning parameter used when determining the feeding force of the transport unit is determined from the history data associated with the setting information in various states. Can deepen learning depth early. As a result, the accuracy of the learning parameter is increased, and the control accuracy can be improved.

  The control device for the combination weighing device according to the present invention may determine the start of variation control according to the degree of temporal variation of each of the first to n-th setting information between the history information accumulated in the accumulation unit. .

  The control unit in the control device for the combination weighing device having this configuration has a small degree of temporal variation of each of the first to n-th setting information between the history information stored in the storage unit, that is, the same. It is possible to appropriately determine a situation where only history data associated with setting information in a different state can be acquired.

  In the control device for the combination weighing device of the present invention, the control unit includes each of the first to n-th setting information included in a plurality of history information continuously obtained within a predetermined period within a predetermined range. In this case, the variation control may be started.

  The control unit in the control device for the combination weighing device having this configuration has a small degree of temporal variation of each of the first to n-th setting information between the history information stored in the storage unit, that is, the same. Therefore, it is possible to appropriately and easily determine a situation in which only history data associated with setting information of various states can be acquired.

  In the control device for the combination weighing device according to the present invention, the control unit is configured such that a part of the first to n-th setting information included in the plurality of history information obtained continuously within a predetermined time is set information. When the value is outside the value included in the reference range set to, the fluctuation control may be terminated.

  With the control device for the combination weighing device having this configuration, it is possible to improve the control accuracy and appropriately cope with a sudden change in the supply amount of the articles.

  The setting information stored in the storage unit of the control device for the combination weighing device of the present invention may include the layer thickness of the article placed on the transport unit.

  In the control device for the combination weighing device having this configuration, one piece of setting information related to the supply operation to the hopper is easily obtained.

  The control unit of the control device for the combination weighing device according to the present invention may change the setting information related to the article feeding force in the transport unit by changing the target supply amount.

  The control device for the combination weighing device having this configuration can vary the feeding force with easy control.

  The control unit of the control device for the combination weighing device according to the present invention varies the slant width in the slant control in which the target supply amounts to the respective hoppers are different from each other, or varies the target value of the number of selected hoppers serving as a combination index. Accordingly, the target supply amount may be varied.

  The control device for the combination weighing device having this configuration can easily change the target supply amount by using the control for increasing the accuracy of the combination weighing.

  The combination weighing device according to the present invention includes a transport unit that transports an article supplied from the outside, an acquisition unit that acquires the supply amount of the article supplied from the outside to the transport unit, and the article transported by the transport unit temporarily. A plurality of hoppers to be stored, a weighing unit for weighing articles stored in the hopper, and a control device for the combination weighing device.

  In the combination weighing device having this configuration, each of the first to n-th setting information accumulated in the accumulation unit is performed by performing variation control for varying the supply amount from the outside of the article and / or the target supply amount. The degree of variation becomes large. For example, if the variation control is executed when each of the first to n-th setting information accumulated in the accumulation unit is small, the setting information accumulated in the accumulation unit before the variation control is performed. The degree of spread is greater than the degree of variation from each of the above. If the degree of variation of the setting information stored in the storage unit is wide, the learning parameter used when determining the feeding force of the transport unit is determined from the history data associated with the setting information in various states. Will be able to improve the learning depth early. As a result, the accuracy of the learning parameter is increased, and the control accuracy can be improved.

  The combination weighing device system of the present invention includes at least one combination weighing device and a control device for the combination weighing device connected to the combination weighing device, and the combination weighing device is an article supplied from the outside. A transport unit that transports the article, an acquisition unit that acquires the supply amount of articles supplied from the outside onto the transport unit, a plurality of hoppers that temporarily store articles transported by the transport unit, and a hopper A weighing unit for weighing articles.

  In the combination weighing device system having this configuration, the first to n-th setting information accumulated in the accumulating unit is stored by executing variation control that varies the supply amount from the outside of the article and / or the target supply amount. Each degree of variation increases. For example, if the variation control is executed when each of the first to n-th setting information accumulated in the accumulation unit is small, the setting information accumulated in the accumulation unit before the variation control is performed. The degree of spread is greater than the degree of variation from each of the above. If the degree of variation of the setting information stored in the storage unit is wide, the learning parameter used when determining the feeding force of the transport unit is determined from the history data associated with the setting information in various states. Will be able to improve the learning depth early. As a result, the accuracy of the learning parameter is increased, and the control accuracy can be improved.

  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. (A) is a figure which shows the dispersion | variation in the setting information after execution of fluctuation control, (B) is a figure which shows the dispersion | variation in the setting information before execution of fluctuation control. 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 (conveying unit) 3, a plurality of radiation feeders (conveying units) 4, a distance measuring sensor 45, and a plurality of pool hoppers 5. A plurality of weighing hoppers (hoppers) 6, a plurality of booster hoppers (hoppers) 7, a collective chute 8, a timing hopper 9, a weighing unit 11, and a control device (control device for a combination weighing device) 20 . 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 thereof. Each weighing hopper 6 temporarily stores the articles A discharged from the corresponding pool hopper 5 with the gate 6a and the gate 6b closed, and temporarily stores them by opening the gate 6a or the gate 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 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 parameter includes, for example, the layer thickness S, the actual supply amount W1, and the feeding force P among the setting information regarding the supply operation of the article A applied to the combination weighing device 1 to the pool hopper (hopper) 5 in the past. The setting information (corresponding to the first to nth setting information) is determined based on a plurality of pieces of history information associated with each other. The combination weighing device 1 stores, for example, the layer thickness S, the actual supply amount W1, and the feeding force P as the first to third setting information, for example. Here, the setting information means parameters 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 in a state in which the first to n-th setting information is associated with each other. The setting information in the above is not limited to the above-described configuration, and may include the operation time for operating the radiation feeder 4, the operation time for operating the distributed feeder 3, the operation intensity of the distributed feeder 3, and the like. Absent. 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 the like, or a hard disk.

  The control unit 20A uses at least the learning parameter and the feed force P determined according to the target supply amount W of the article A set for the pool hopper 5 (weighing hopper 6), so that the radiation feeder 4 is used. Control. 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 in accordance with 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 20 </ b> A is based on the following formula (1) that is a relationship among the layer thickness S of the article A, the target supply amount W of the radiation feeder 4, and the feed force P of the radiation feeder 4. The feed force P of the radiation feeder 4 is controlled.
P = B × W / S + C (1)

  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 sequentially obtains the coefficient B and the coefficient C based on the information regarding the layer thickness S, the supply amount W1, and the feed force P that are continuously acquired from the past and accumulated in the accumulation unit 20B. Here, the coefficient B and the coefficient C are change trends generated based on the first to n-th setting information set in the past in the device itself. The control unit 20A causes the storage unit 20B to store history information including at least the actual supply amount W1 when the feeding force P is controlled according to the layer thickness S so as to be a predetermined target supply amount W. . In this case, the control unit 20A accumulates the layer thickness S as the first setting information included in the history information, the actual supply amount W1 as the second setting information, and the power P as the third setting information in the accumulation unit 20B. Let Note that the control unit 20A may store the feeding force P, the value obtained by dividing the supply amount W1 by the layer thickness S (supply amount W1 / layer thickness S), and the operation time t of the radiation feeder 4 in association with each other. (See FIG. 5). The control unit 20A updates the coefficient B and the coefficient C based on such history information.

  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 (the 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.

  Here, the control unit 20A of the present embodiment varies the target supply amount W according to the variation in the layer thickness S (setting information) between the history information stored in the storage unit 20B. As a result, the control unit 20A varies the history information accumulated in the accumulation unit 20B. Specifically, the control unit 20A determines whether or not the variation control is started based on the degree of temporal variation of the setting information between the history information accumulated in the accumulation unit 20B. More specifically, the control unit 20A starts variation control when the layer thickness S included in a plurality of history information continuously obtained within a certain period is included in a predetermined range. For example, among the plurality of layer thicknesses S included in the history information, a change rate of two layer thicknesses S that are temporally continuous may be within ± 5% within the predetermined range. Further, when the correlation coefficient when the coefficient B and the coefficient C are derived by the least square method or the like is less than a preset threshold value, the variation control may be started.

  The controller 20 </ b> A varies the power supply P (setting information related to the power supply) of the article A in the radiation feeder 4 by changing the target supply amount W. The fluctuation of the target supply amount W is, for example, a target value of the number of selected hoppers that changes the slant width in the slant control in which the target supply amounts W to the respective weighing hoppers 6 (pool hoppers 5) are different from each other, or serves as a combination index. Fluctuate. Here, the slant width is a difference in the target supply amount set in each weighing hopper 6 (pool hopper 5). That is, when the slant width is large, the target supply amount of each weighing hopper 6 (pool hopper 5) varies as compared with the case where the slant width is small. When the slant width is varied in the above, for example, the slant width is varied from −6% to + 6% at 2% intervals with the current value as a reference value. On the other hand, when changing the target value of the selected hopper number, for example, the target value of the selected hopper number is changed from −0.15 to +0.15 at 0.05 intervals with the current value as a reference value.

  The control unit 20A includes a part of the first to n-th setting information included in a plurality of history information obtained continuously within a certain time in a reference range set in the setting information. If the value is other than the value, the variation control is terminated. Further, when the correlation coefficient when the coefficient B and the coefficient C are derived by the least square method or the like is equal to or larger than a preset threshold value, the variation control may be terminated.

  As described above, the combination weighing device 1 according to the above-described embodiment performs the variation control for changing the target supply amount W, whereby the layer thickness S, the actual supply amount W1, and the accumulation amount stored in the storage unit 20B. The degree of variation of each of the plurality of history information associated with the setting information such as the feeding force P increases. For example, if the variation control is executed when the variation in the history information accumulated in the accumulation unit 20B is small, the degree of variation in the history information accumulated in the accumulation unit 20B before the variation control is performed (see FIG. 4 (B)), the degree is wider (see, for example, FIG. 4A). That is, in the fluctuation control, the history information concentrated in a narrow range centered on the predetermined feed force P as shown in FIG. 4B is expanded to the distribution state as shown in FIG. It is done. If the degree of variation in the history information accumulated in the accumulation unit 20B increases, learning parameters (coefficient B and coefficient C) used when determining the feed force of the radiation feeder 4 are associated with setting information in various states. The learning depth can be deepened at an early stage. As a result, the accuracy of the learning parameter is increased, and the control accuracy can be improved. 4A and 4B, the straight line f (the straight line set based on the correlation coefficient when the coefficient B and the coefficient C are derived by the least square method) is the layer thickness of the article A. The above formula (1), which is a relationship between S, the target supply amount W of the radiating feeder 4 and the feeding force P of the radiating feeder 4 is shown.

  The control unit 20A of the combination weighing device 1 of the above embodiment determines the start of variation control based on the degree of temporal variation of the setting information between the history information accumulated in the accumulation unit 20B. Thereby, the control unit 20A has a similar state as shown in FIG. 4B when the degree of temporal variation of the setting information between the history information stored in the storage unit 20B is small. It is possible to appropriately determine a situation in which only history data associated with the setting information can be acquired.

  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 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 control unit 82 is a device that controls parameters relating 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 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 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 control unit 82 of the management server 80 executes the variation control for varying the respective target supply amount W in each combination weighing device 1. In each combination weighing device 1 in which the variation control is performed by the control unit 82, the degree of variation of each of the plurality of history information associated with the setting information such as the layer thickness S, the actual supply amount W1, and the feeding force P is large. Become. As a result, the accuracy of the learning parameter is increased, and the control accuracy 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 embodiment or modification, the example of changing the target supply amount W has been described as an example of the change control executed by the control unit 20A (82), but instead of or in addition to this, the outside of the article A The supply amount from may be changed. In this case, the control unit 20 </ b> A (82) executes the variation control by varying the transport amount (supply amount) in the transport conveyor 50.

  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 dispersion | distribution feeder 3 mentioned above and the some radiation feeder 4 were mentioned and demonstrated as an example of a conveyance part, it is not limited to this, As long as it has the structure which can convey the article | item A. Good. 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 units 20A and 82 control the number of rotations (rpm) of the coil unit and the like as the feed force P. In the case of a belt conveyor, the control units 20A and 82 control the number of rotations of rollers that drive 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 weighing device, 3 ... Dispersion feeder, 4 ... Radiation feeder, 5 ... Pool hopper, 6 ... Measurement hopper, 20 ... Control device (control device for combination weighing device), 20A ... Control unit, 20B ... Accumulation unit, 45 ... Ranging sensor, 50 ... Conveyor, 80 ... Management server (control device for combination weighing device), 81 ... Communication unit, 82 ... Control unit, 83 ... Storage unit, 100 ... Combination weighing device system, A ... Article , B ... coefficient, C ... coefficient, P ... feed force, S ... layer thickness, W ... target supply amount, W1 ... supply amount.

Claims (9)

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 weighing unit that measures the articles stored in the hoppers. A control device for a combination weighing device,
A combination of the measurement values is selected from each measurement value of the articles stored in the plurality of hoppers so that a total value becomes a preset target measurement value, and the article is removed from the hopper corresponding to the combination. A control unit for discharging,
An accumulation unit for accumulating a plurality of history information associated with the first to nth setting information among the setting information relating to the operation of supplying the article to the hopper applied to the combination weighing device in the past; Prepared,
The controller is
Set learning parameters based on the plurality of history information,
Determining a feed force according to at least the learning parameter and a target supply amount of the article set for the hopper;
Controlling the transport unit by the determined feed force,
Fluctuation control is performed to vary the supply amount from the outside of the article and / or the target supply amount in accordance with variations in the first to n-th setting information among history information stored in the storage unit. ,
Control device for combination weighing device.   The control unit determines start of the variation control according to a degree of temporal variation of each of the first to n-th setting information between the history information accumulated in the accumulation unit. Control device for combination weighing devices.   The control unit starts the variation control when each of the first to n-th setting information included in the plurality of history information continuously obtained within a certain period is included in a predetermined range. The control device for the combination weighing device according to claim 2.   The control unit includes a part of the first to n-th setting information included in the plurality of history information obtained continuously within a predetermined time in a reference range set in the setting information The control device for a combination weighing device according to claim 1, wherein the variation control is terminated when the value is other than a predetermined value.   The control device for a combination weighing device according to any one of claims 1 to 4, wherein the setting information includes a layer thickness of the article placed on the transport unit.   The control device for a combination weighing device according to any one of claims 1 to 4, wherein the control unit varies setting information relating to the power of the article in the transport unit by varying the target supply amount. .   The control unit varies the target supply amount by varying the slant width in the slant control in which the target supply amounts to the hoppers are different from each other, or by varying the target value of the number of selected hoppers serving as a combination index. A control device for a combination weighing device according to claim 6. A transport unit for transporting articles supplied from the outside;
An acquisition unit for acquiring a supply amount of the article supplied from the outside onto the transport unit;
A plurality of hoppers for temporarily storing the articles conveyed by the conveying unit;
A weighing unit for weighing the article stored in the hopper;
A control device for the combination weighing device according to any one of claims 1 to 7;
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 7, which is connected to the combination weighing device;
The combination weighing device is
A transport unit for transporting articles supplied from the outside;
An acquisition unit for acquiring a supply amount of the article supplied from the outside onto the transport unit;
A plurality of hoppers for temporarily storing the articles conveyed by the conveying unit;
A weighing unit for weighing the article stored in the hopper;
A combination weighing device system.

Images