JP2017133955A - Combination weighing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combination weighing device capable of specifying a conveyance section in which an abnormality occurs by comparing parameters between conveyance sections.SOLUTION: A combination weighing device 1 includes: a plurality of conveyance sections 4; a plurality of hoppers 6; a weighing section 11 which outputs a weighed value of an article stored in each of the hoppers 6; a control section 20 which selects the combination of the weighed values from the plurality of weighed values so that a total value becomes a target weighed value and causes the hopper 6 corresponding to the combination to discharge an article; and acquisition section 24 which acquires a parameter determined on the basis of a plurality of pieces of history information in which a set value of delivery force of articles in the conveyance sections 4 set in the past and supply amounts of articles supplied from the conveyance sections 4 to the hoppers 6 when the set value is set are associated with each other for each conveyance section 4. The control section 20 compares the parameter for each conveyance section 4 and specifies the conveyance section 4 in which an abnormality occurs of the plurality of conveyance sections 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a combination weighing device.

  As a conventional combination weighing device, for example, a device described in Patent Document 1 is known. The combination weighing device described in Patent Document 1 is data based on an image photographed by a camera, and is based on non-moving area data stored in a non-moving area data storage area, and data based on an image photographed by the camera. Using the data stored in the drive data storage area, an article conveyance abnormality in the article conveyance unit is determined. Thereby, in this combination weighing device, it is possible to cope only with a stay (conveyance abnormality) with high importance.

JP 2013-250143 A

  In the conventional combination weighing device, based on the image taken by the camera, a state in which there is a possibility that a trouble may occur in the conveyance is determined based on the stay area of the article generated in the article conveyance unit. However, in this case, since the abnormality of the conveyance of the article is detected based on the image, the article staying in the article conveyance unit is flowing normally, but it is difficult to detect an abnormality such as an attachment mistake of the article conveyance unit.

  An object of the present invention is to provide a combination weighing device that can identify a conveyance unit in which an abnormality has occurred by comparing parameters between conveyance units.

  A combination weighing device according to the present invention includes a plurality of conveyance units that convey articles, a plurality of hoppers that are provided corresponding to each of the plurality of conveyance units, and that temporarily store articles conveyed by the conveyance units; Select a combination of weighing values so that the total value becomes the target weighing value from the weighing unit that outputs the weighing value according to the mass of the article stored in each hopper and the multiple weighing values output by the weighing unit And a control unit that discharges the articles to the hopper corresponding to the combination, a set value related to the feeding force of the articles in the transport unit set in the past, and the set value is supplied from the transport unit to the hopper. An acquisition unit that acquires, for each transport unit, a parameter that is determined based on a plurality of pieces of history information associated with the supply amount of the articles, and that is used when determining the feeding force of the transport unit; Prepare and control Compares the parameters of each transport unit, it identifies a transport unit that abnormality has occurred among the plurality of transport.

  In this combination weighing device, the acquisition unit includes a setting value related to the power of the article in the conveyance unit set in the past, a supply amount of the article supplied from the conveyance unit to the hopper when the set value is set, and Are determined based on a plurality of pieces of history information associated with each other, and used for determining the feeding force of the transport unit, for each transport unit. A control part specifies the conveyance part in which abnormality has generate | occur | produced among several conveyance parts by comparing the parameter for every conveyance part. In this way, in the combination weighing device, in order to identify a conveyance unit in which an abnormality has occurred by comparing parameters instead of measurement values, for example, an article is being conveyed normally, but a conveyance unit in which an abnormality has occurred Can be identified. Note that specifying a transport unit in which an abnormality has occurred includes specifying a transport unit in which an abnormality has actually occurred, and specifying a transport unit in which an abnormality is predicted to occur. obtain.

  In one embodiment, the acquisition unit may acquire a parameter that associates a relationship between a value obtained based on information on the height of an article on the conveyance unit and a supply amount and a setting value related to power supply. In this configuration, the parameter changes due to a change in the height of the article on the transport unit. Therefore, for example, when an abnormality has occurred in the article on the transport unit, the state of the abnormality is reflected in the parameter. Therefore, in the combination weighing device, it is possible to more reliably specify that an abnormality has occurred in the transport unit.

  In one embodiment, the control unit sets a parameter as a comparison reference based on at least a part of parameters acquired for each conveyance unit, and compares the parameter as the set comparison reference with each parameter. Thus, a conveyance unit in which an abnormality has occurred from a plurality of conveyance units may be specified. Thereby, in the combination weighing device, it is possible to reliably identify an abnormality in the transport unit.

  In one embodiment, the control unit may compare the parameters for each transport unit using the latest parameter acquired by the acquisition unit. Thereby, in the combination weighing device, it is possible to specify the abnormality of the transport unit in the latest state.

  In one embodiment, the control unit may compare parameters for each transport unit acquired at the same timing by the acquisition unit. If the acquired timing is different, the state (size, etc.) of the article may be different at each timing, and the state can be reflected in the parameter. Therefore, when parameters at different timings are used, a difference in state may affect abnormality determination. In the combination weighing device of one embodiment, since the parameters at the same timing are compared, the difference in the state does not affect the abnormality determination. Therefore, it is possible to more appropriately identify the abnormality of the transport unit.

  In one embodiment, the control unit may compare parameters for each transport unit after combination weighing is performed a predetermined number of times. Thereby, since the combination weighing device periodically compares the parameters for each transport unit, the abnormality of the transport unit can be confirmed periodically.

  In one embodiment, when the control unit identifies a conveyance unit in which an abnormality has occurred from a plurality of conveyance units, the parameter set in the identified conveyance unit is set to a conveyance unit different from the identified conveyance unit. It may be replaced with a parameter calculated based on the parameter to be calculated. Thereby, when the conveyance part by which abnormality was specified restarts, a conveyance part can be operated with the parameter suitable for the said conveyance part.

  In one embodiment, the control unit may calculate an average value of parameters set in a transport unit adjacent to the identified transport unit as a parameter related to replacement. The conveyance status of the conveyance unit adjacent to the conveyance unit in which the abnormality is specified is similar to the conveyance status of the conveyance unit in which the abnormality is specified. Therefore, by setting the average value of the parameters set in the transport unit adjacent to the transport unit in which the abnormality is specified as a parameter related to replacement, the transport unit in which the abnormality is specified is the optimum parameter for the situation of the transport unit. Can be restarted.

  In one embodiment, the control unit may initialize a parameter set in the identified transport unit when the transport unit in which an abnormality has occurred is identified from the plurality of transport units. Thereby, when the conveyance part in which abnormality was specified restarts, it can be operated by the initialized parameter.

  According to the present invention, it is possible to identify a conveyance unit in which an abnormality has occurred by comparing parameters between the conveyance units.

It is a figure which shows the structure of the combination weighing | measuring apparatus which concerns on one Embodiment. It is a figure which shows the functional structure of a control part. It is a figure which shows the discharge end vicinity of a radiation feeder. It is a graph which shows the relationship between layer thickness and supply amount.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same or an equivalent part, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 1, the combination weighing device 1 includes an input chute 2, a dispersion feeder 3, a plurality of radial feeders (conveying units) 4, a plurality of pool hoppers 5, and 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 unit 20. The combination weighing device 1 measures the articles supplied by the conveyor 50 so as to have a target measurement value, and supplies them to the bag making and packaging machine 60. Here, the articles are articles such as agricultural products, marine products, processed foods, and the like that vary in unit mass.

  The bag making and packaging machine 60 described above packs the articles measured and supplied by the combination weighing device 1 while forming the film into a bag having a predetermined capacity. In the above, the article may be an article having no variation in the single mass.

  The input chute 2 is disposed below the transport end 50 a of the transport conveyor 50. The input chute 2 receives articles dropped from the transport end 50a of the transport conveyor 50 and discharges them 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 to uniformly convey the articles discharged from the input chute 2 to the top of the conveyance surface 3a toward the outer edge of the conveyance 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, and conveys the articles discharged from the outer edge of the conveying surface 3a toward the tip of the trough 4a.

  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 articles 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 articles 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 articles discharged from the corresponding pool hopper 5 by closing the gate 6a and the gate 6b. Furthermore, each weighing hopper 6 discharges the temporarily stored articles downward by opening the gate 6a or the gate 6b.

  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 discharged from the gate 6a side of the corresponding weighing hopper 6 by closing the gate 7a. Furthermore, each booster hopper 7 discharges the temporarily stored articles downward by opening the gate 7a.

  The collective chute 8 has a cylindrical structure having an inner surface 8a of a truncated cone tapered 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 articles discharged from the gate 6b side of each weighing hopper 6 and the articles discharged from each booster hopper 7 by the inner surface 8a and discharges them 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 discharged from the collective chute 8 by closing the gate 9a. Further, the timing hopper 9 opens the gate 9 a to discharge the temporarily stored article to the bag making and packaging machine 60.

  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 is temporarily stored in each weighing hopper 6, the weighing unit 11 measures a measurement value corresponding to the mass of the article.

  The control unit 20 is disposed in the case 13. The control unit 20 is a device that controls various operations in the combination weighing device 1, and includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The control unit 20 performs the transport operation of the dispersion feeder 3 and each 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 7a opening / closing of each booster hopper 7. The operation and the operation of each part of the combination weighing device 1 such as the gate 9a of each timing hopper 9 are controlled.

  The control unit 20 stores the measurement value measured by the measurement unit 11 in association with the measurement hopper 6 and / or the booster hopper 7 in which articles corresponding to the measurement value are stored. Specifically, when the article weighed by the weighing unit 11 is stored in the weighing hopper 6, the control unit 20 stores the measured value measured by the measuring unit 11 and the article corresponding to the measured value. The hopper 6 is associated and stored. When the article weighed by the weighing unit 11 is discharged to the booster hopper 7 corresponding to the weighing hopper 6, the control unit 20 corresponds to the weighing value of the article weighed by the weighing unit 11 and the weighing hopper 6. The booster hopper 7 is stored in association with it.

  The control unit 20 combines the measurement values so that the total value becomes the target measurement value from the plurality of measurement values measured by the measurement unit 11 and respectively associated with the plurality of measurement hoppers 6 and / or the booster hopper 7. select. Specifically, the control unit 20 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 with the target measurement value as a lower limit value. Then, the control unit 20 causes the weighing hopper 6 and / or the booster hopper 7 corresponding to the combination to discharge the article.

  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 plurality of booster hoppers 7, the collective chute 8, and the timing hopper 9 are supported directly or indirectly by the frame 12.

  Next, the control unit 20 will be described in more detail. FIG. 2 is a diagram illustrating a functional configuration of the control unit. As shown in FIG. 2, the control unit 20 includes a storage unit 22, an acquisition unit 24, a feeder control unit 26, an abnormality specifying unit 28, and a setting unit 30. The control part 20 has the memory | storage part 22, the acquisition part 24, the feeder control part 26, and the abnormality specific part 28 as a conceptual part which performs various control processes. Such a conceptual part can be configured, for example, as software executed by the CPU after a program stored in the ROM is loaded onto the RAM.

The storage unit 22 stores the article layer thickness S on the radiation feeder 4, the supply amount W1 from the radiation feeder 4 to the corresponding weighing hopper 6 (pool hopper 5), and the feeding force P of the radiation feeder 4. . Here, the corresponding layer thickness S, supply amount W1, and feed force P satisfy the following formula (1). As shown in FIG. 4, as the layer thickness S increases, the supply amount W1 supplied to the pool hopper 5 (the weighing hopper 6) tends to increase.
P = A × W / S + B (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 of articles 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 of articles supplied from the radiation feeder 4 to the weighing hopper 6 increases.

  As shown in FIG. 3, the layer thickness S is a distance between the bottom surface 4 s of the radiation feeder 4 and the upper part of the article in the vicinity of the discharge end of the radiation feeder 4. The layer thickness S is detected by the distance measuring sensor 32. The distance measuring sensor 32 is disposed above each radiation feeder 4 so as to correspond to each radiation feeder 4. The distance measuring sensor 32 is attached to a support frame (not shown) and is located above the radiation feeder 4.

  In the above description, the configuration in which the combination weighing device 1 includes the distance measuring sensor 32 that detects the layer thickness S has been described. However, the distance measuring sensor 32 may be configured as an external device different from the combination weighing device 1. In this case, the combination weighing device 1 simply acquires information on the layer thickness S from the external device. In short, the distance measuring sensor 32 is not an essential configuration, and as a result, any configuration may be used as long as the combination weighing device 1 acquires information on the layer thickness S.

  The distance measuring sensor 32 detects the distance between the distance measuring sensor 32 and the article on the radiation feeder 4. For example, the distance measuring sensor 32 emits light toward the article and receives the light reflected by the article. Thereby, the distance measuring sensor 32 obtains the distance between the distance measuring sensor 32 and the article. As shown in FIG. 3, the distance measuring sensor 32 detects a distance from an article located near the discharge end of the radiation feeder 4. The vicinity of the discharge end is a position where the radiation feeder 4 moves backward by a predetermined distance from the tip in the transport direction. For example, this position is a position retracted about 30 mm to 50 mm from the tip of the radiation feeder 4. The distance measuring sensor 32 transmits a detection signal indicating the detected distance to the article to the acquisition unit 24 and the feeder control unit 26.

  In the above formula (1), each of “A” and “B” is a coefficient. The coefficient A and the coefficient B are parameters that link the relationship between the value obtained based on the layer thickness S of the article and the supply amount W1 and the feed force P. As for the coefficient A and the coefficient B, 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. Each coefficient A and coefficient B are values that can be changed according to the shape of the radiation feeder 4 and / or the type of article.

  The acquisition unit 24 sequentially calculates the coefficient A and the coefficient B based on the layer thickness S, the supply amount W1, and the feeding force P acquired continuously from the past. That is, the acquisition unit 24 calculates the coefficient A and the coefficient B by learning control.

  Specifically, the acquisition unit 24 performs the actual supply when the radiation feeder 4 is operated with the power P for the operation time in accordance with the layer thickness S so that the target supply amount W is set in advance. The amount W1 is stored as history information. In this case, the acquisition unit 24 calculates the layer thickness S of the article based on the distance indicated by the detection signal transmitted from the distance measuring sensor 32. Specifically, the acquisition unit 24 calculates the layer thickness S of the article based on the difference between the distance from the bottom surface 4s of the radiation feeder 4 to the distance measuring sensor 32 and the distance indicated by the detection signal. The acquisition unit 24 stores the power 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 in the storage unit 22 in association with each other.

  The acquisition unit 24 calculates the coefficient A and the coefficient B based on the plurality of history information stored in this way. In this case, the acquisition unit 24 calculates the coefficient A and the coefficient B 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 acquisition unit 24 derives a new coefficient A and coefficient B by, for example, the least square method based on the history information acquired so far for each operation time. In addition, when deriving new coefficients A and B, weights (magnitude of influence when determining new coefficients A and B) can be set for individual history information. For example, for information close to the current time, the weight is high.

  The acquisition unit 24 may calculate new coefficients A and B at the timing when the history information is updated. The coefficient A and the coefficient B are used when determining the current or future power P.

  The feeder control unit 26 controls the feeding force P of the radiation feeder 4. Using the above equation (1), the feeder control unit 26 uses the above-described equation (1) to obtain the article thickness S based on the distance detected by the distance measuring sensor 32 and the supply amount W1 that is the set target supply amount. The radiation feeder 4 is controlled by the force P. The feeder control unit 26 calculates the feed force P by substituting the layer thickness S of the article and the supply amount W1 as the target supply amount into the above equation (1). The feeder control unit 26 controls the operation of the radiation feeder 4 that operates continuously by the calculated feed force P.

  The abnormality specifying unit 28 specifies the radiation feeder 4 in which an abnormality has occurred. Here, the coefficient A and the coefficient B calculated in each of the radiation feeders 4 ideally have substantially the same value due to accumulation of updates by learning. If it demonstrates from another viewpoint, even if it is a case where the target supply amount set to each radiation feeder 4 differs, the coefficient A and the coefficient B will become a substantially the same value as mentioned above. Using this property, the abnormality identification unit 28 compares the coefficient A and the coefficient B for each radiation feeder 4 and identifies the radiation feeder 4 in which an abnormality has occurred among the plurality of radiation feeders 4. The abnormality is, for example, that the conveyance of the article is delayed due to some trouble in the radiation feeder 4, and the coefficient A and the coefficient B become abnormal values. Further, as another specific example, the abnormality is that the attachment portion of one radiation feeder 4 is loosened, so that the coefficient A related to one radiation feeder 4 is compared with the coefficient A and coefficient B in the other radiation feeder 4. And the coefficient B becomes an abnormal value. In short, the abnormality means a problem that occurs in the radiation feeder 4 itself.

  For example, there is a case where the connection between the radiation feeder 4 and the shaker installed therebelow is not properly attached. Further, as another problem, there is a case where a flavoring material or the like attached to the article adheres to the radiation feeder 4 and the conveyance of the article is hindered.

  The abnormality specifying unit 28 compares the coefficient A and the coefficient B for each radiation feeder 4, and the coefficient A and the coefficient B of one radiation feeder 4 are within a predetermined range of the coefficient A and the coefficient B of a plurality of other radiation feeders 4. If it exceeds, it is determined that an abnormality has occurred in one radiation feeder 4. The predetermined range may be set arbitrarily.

  The abnormality specifying unit 28 is not limited to the above-described operation. For example, the abnormality specifying unit 28 may set a coefficient as a comparison reference based on at least a part of the coefficient A and the coefficient B of each of the radiation feeders 4. I do not care. In this case, the abnormality specifying unit 28 compares the set coefficient as the comparison reference with the coefficient A and the coefficient B set for each of the radiation feeders 4. As a result, the abnormality specifying unit 28 determines that an abnormality has occurred in the radiation feeder 4 when the coefficient A and the coefficient B of one radiation feeder 4 are different from the coefficient used as the comparison reference by a predetermined value. .

  The abnormality specifying unit 28 compares the coefficient A and the coefficient B of each radiation feeder 4 at a predetermined timing. In the present embodiment, the predetermined timing is, for example, when combination weighing is performed a predetermined number of times (for example, 100 times). Thus, the accuracy of the comparison itself can be improved by comparing the coefficient A and the coefficient B of each radiation feeder 4 after the combination weighing is performed a predetermined number of times or more.

  The abnormality specifying unit 28 compares the latest coefficient A and coefficient B at the same timing at the timing when the coefficient A and the coefficient B are compared. For example, the abnormality specifying unit 28 reads the latest coefficient A and coefficient B from the storage unit 22 at the timing when the coefficient A and the coefficient B are compared, and compares the coefficient A and the coefficient B of each radiation feeder 4.

  When the abnormality specifying unit 28 specifies the radiation feeder 4 in which an abnormality has occurred, for example, the abnormality specifying unit 28 notifies the radiation feeder 4 that an abnormality has occurred. Specifically, for example, when specifying the radiation feeder 4 in which an abnormality has occurred, the abnormality specifying unit 28 displays that fact on a display for performing setting and management. The notification means is not particularly limited as long as it can identify the radiation feeder 4 in which an abnormality has occurred, and may be a lamp, a buzzer, or the like.

  When the setting unit 30 identifies the radiation feeder 4 in which an abnormality has occurred by the abnormality identifying unit 28, the coefficient A and the coefficient B set in the identified radiation feeder 4 are different from the radiation feeder 4 that has been identified. Is replaced with the coefficient A and the coefficient B calculated based on the coefficient A and the coefficient B set in (1). Specifically, the setting unit 30 calculates the average value of the coefficient A and the coefficient B set in the radiation feeder 4 adjacent to the radiation feeder 4 that has specified the abnormality as the coefficient A and the coefficient B related to replacement. The setting unit 30 sets the coefficient A and the coefficient B to the radiation feeder 4 in which the abnormality is specified. Thereby, the radiation feeder 4 is controlled by the feeding force P based on the coefficient A and the coefficient B when the radiation feeder 4 is restarted.

  As described above, in the combination weighing device 1 according to the present embodiment, the acquisition unit 24 radiates when the set value related to the power of the article in the radiating feeder 4 set in the past and the set value are set. A parameter determined based on a plurality of pieces of history information in association with the supply amount of articles supplied from the feeder 4 to the weighing hopper 6 (pool hopper 5), and is used when determining the feed force of the radiation feeder 4 The coefficient A and the coefficient B to be acquired are acquired for each radiation feeder 4. The abnormality identifying unit 28 identifies the radiation feeder 4 in which an abnormality has occurred among the plurality of radiation feeders 4 by comparing the coefficient A and the coefficient B for each radiation feeder 4. Thus, in the combination weighing device 1, in order to identify the radiation feeder 4 in which an abnormality has occurred by comparing the coefficient A and the coefficient B instead of the measurement value, for example, the article is normally conveyed, but the abnormality is The generated radiation feeder 4 can be identified. Note that specifying the radiation feeder 4 in which an abnormality has occurred specifies the radiation feeder 4 in which an abnormality has actually occurred, and specifies the radiation feeder 4 that is predicted to have an abnormality. Can include.

  In the present embodiment, a distance measuring sensor 32 that detects the layer thickness S of the article on the radiation feeder 4 is provided. The acquisition unit 24 acquires a parameter that associates a relationship between a value obtained based on the layer thickness S of the article on the radiation feeder 4 and the supply amount W1 and a set value related to the power supply P. In this configuration, the coefficient A and the coefficient B change due to the change in the layer thickness S of the article on the radiation feeder 4. Therefore, for example, when an abnormality occurs in the article on the radiating feeder 4, the abnormality state is reflected in the coefficient A and the coefficient B. Therefore, the combination weighing device 1 can more reliably specify that an abnormality has occurred in the radiation feeder 4.

  In the present embodiment, the abnormality specifying unit 28 uses the latest coefficient A and coefficient B acquired by the acquisition unit 24 to compare the coefficient A and the coefficient B for each radiation feeder 4. Thereby, in the combination weighing device 1, it is possible to specify the abnormality of the radiation feeder 4 in the latest state.

  In the present embodiment, the abnormality specifying unit 28 compares the coefficient A and the coefficient B for each radiation feeder 4 acquired at the same timing by the acquiring unit 24. If the acquired timing is different, the state (size, etc.) of the article may be different at each timing, and the state can be reflected in the coefficient A and the coefficient B. For this reason, when the coefficient A and the coefficient B at different timings are used, the difference in state may affect the abnormality determination. Since the combination weighing device 1 compares the coefficient A and the coefficient B at the same timing, the difference in the state does not affect the abnormality determination. Therefore, the abnormality of the radiation feeder 4 can be specified more appropriately.

  In the present embodiment, the abnormality specifying unit 28 may compare the coefficient A and the coefficient B for each radiation feeder 4 when the combination weighing is executed a predetermined number of times. Thereby, in combination weighing device 1, since coefficient A and coefficient B for every radiation feeder 4 are compared periodically, abnormality of radiation feeder 4 can be checked regularly.

  In the present embodiment, when the setting unit 30 identifies a radiation feeder 4 in which an abnormality has occurred from a plurality of radiation feeders 4, the setting unit 30 identifies the specified radiation feeder 4 with the coefficient A and the coefficient B set in the identified radiation feeder 4. 4 is replaced with a coefficient A and a coefficient B calculated based on a coefficient A and a coefficient B set in the radiation feeder 4 different from 4. Thereby, when the radiation feeder 4 in which abnormality is specified is restarted, the radiation feeder 4 can be operated with the coefficient A and the coefficient B suitable for the radiation feeder 4.

  In the present embodiment, the setting unit 30 calculates the average value of the coefficient A and the coefficient B set in the radiation feeder 4 adjacent to the radiation feeder 4 that has specified the abnormality as the coefficient A and the coefficient B related to replacement. The conveyance situation of the radiation feeder 4 adjacent to the radiation feeder 4 in which the abnormality is specified is similar to the conveyance situation of the radiation feeder 4 in which the abnormality is specified. For this reason, the radiation feeder 4 in which an abnormality is specified is obtained by setting the average value of the coefficient A and the coefficient B set in the radiation feeder 4 adjacent to the radiation feeder 4 in which the abnormality is specified as the coefficient A and the coefficient B related to replacement. Can be restarted with a coefficient A and a coefficient B that are optimal for the situation of the radiation feeder 4.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, the conveyance part of this invention is not limited to the dispersion | distribution feeder 3 and several radiation feeder 4 which were mentioned above, What is necessary is just to have a structure which can convey articles | goods. Further, the plurality of hoppers of the present invention are not limited to those arranged in an annular shape like the plurality of weighing hoppers 6 and the plurality of booster hoppers 7 described above, and may be arranged in a matrix. Further, the combination weighing device of the present invention may not include a plurality of booster hoppers 7.

  In the above embodiment, an example has been described in which the abnormality specifying unit 28 compares the coefficient A and the coefficient B that control the operation of each radiation feeder 4 when the combination weighing is performed a predetermined number of times. However, the timing at which the abnormality specifying unit 28 compares the coefficient A and the coefficient B is not limited to this. The abnormality specifying unit 28 may compare the coefficient A and the coefficient B every predetermined time. Further, the predetermined time may be different every time.

  In the above-described embodiment, an example has been described in which the abnormality specifying unit 28 compares the latest coefficient A and coefficient B at the same timing at the timing when the coefficient A and the coefficient B are compared. However, the abnormality specifying unit 28 may compare the coefficient A and the coefficient B at any timing.

  In the above-described embodiment, when the radiation feeder 4 in which an abnormality has occurred is specified from the plurality of radiation feeders 4, the setting unit 30 specifies the coefficient A and the coefficient B set in the specified radiation feeder 4 and specifies the radiation feeder. The embodiment in which the coefficient A and the coefficient B calculated based on the coefficient A and the coefficient B set in the radiation feeder 4 different from 4 is replaced with an example has been described. However, when specifying the radiation feeder 4 in which an abnormality has occurred from the plurality of radiation feeders 4, the setting unit 30 may initialize the coefficient A and the coefficient B set in the identified radiation feeder 4 (initial value). You may return to Thereby, when the radiation feeder 4 in which the abnormality is specified is restarted, it can be operated with the initialized coefficient A and coefficient B.

  In the above embodiment, the control unit 20 has been described as an example in which the control unit 20 includes the acquisition unit 24, the abnormality specifying unit 28, and the setting unit 30, but the acquisition unit 24, the abnormality specifying unit 28, and the setting unit 30 are the same as the control unit 20. It may be provided separately.

  Although the distance measurement sensor 32 has been described as an example of the detection unit, the detection unit is not limited to the distance measurement sensor 32. The detection unit may be a camera or the like, for example.

  In the above-described embodiment, an example in which one distance measuring sensor 32 is provided corresponding to each radiation feeder 4 has been described as an example. However, a plurality of distance measuring sensors 32 are provided along the conveyance direction of the radiation feeder 4. It may be done. Thereby, the layer thickness of the articles | goods of several places is detectable. Therefore, the radiation feeder 4 can be controlled based on the overall state of the article conveyed by the radiation feeder 4.

  In the embodiment described above, an example in which one distance measuring sensor 32 is provided corresponding to each radiation feeder 4 has been described as an example. However, the distance measuring sensor 32 is provided corresponding to each radiation feeder 4. It does not have to be. For example, the distance measuring sensor 32 may be provided, for example, two by two with respect to the radiation feeders 4 arranged radially. The supply amount of articles supplied from the dispersion feeder 3 may not be significantly different between the adjacent radiating feeders 4. Therefore, the result detected by one distance measuring sensor 32 is used as the distance to the article in the radiation feeder 4 arranged on both sides of the radiation feeder 4 detected by the distance measuring sensor 32. In this case, since the number of distance measuring sensors 32 (detecting units) can be reduced, the cost can be reduced.

  In the above-described embodiment, the mode in which the feeding force P of the radiating feeder 4 has an amplitude has been described as an example, but the feeding force P may be the vibration time of the radiating feeder 4. Alternatively, the feeding force P may be both amplitude and vibration time.

In the above-described embodiment, an example has been described in which the acquisition unit 24 calculates the layer thickness S of the article based on the detection signal detected by the distance measuring sensor 32 and obtains the feeding force P using the calculated layer thickness S. However, the form which calculates | requires the feeding force P, without calculating the layer thickness S may be sufficient. In the case of this configuration, the following formula (2) is used to calculate the feeding force P.
P = A1 * W / (L-Sp) + B1 (2)

  In the above formula (4), each of “A1” and “B1” is a coefficient. “L” is the distance from the bottom surface 4 s of the radiation feeder 4 to the distance measuring sensor 32. “Sp” is a detection value (a distance between the distance measurement sensor 32 and the article) indicated by the detection signal of the distance measurement sensor 32. When the acquisition unit 24 receives the detection signal transmitted from the distance measuring sensor 32, the acquisition unit 24 substitutes the detection value Sp indicated by the detection signal and the supply amount W1 serving as the target supply amount into the above formula (2), and the transmission power P Is calculated.

  In the above embodiment, the layer thickness S of the article is calculated based on the detection signal detected by the distance measuring sensor 32, but the layer thickness of the article may not be obtained. In this case, the coefficient A and the coefficient B are calculated based on the feed force P and the supply amount W1.

  In addition to the above embodiment, the storage unit 22 may store the supply amount W1, the coefficient A, and the coefficient B in association with the shape of the conveyance path of the article and / or the radiation feeder 4. Thereby, control according to the shape of the conveyance path of the article and / or the radiation feeder 4 can be performed. Therefore, it is possible to save the operator from changing the setting of the coefficient or the like for each shape of the conveyance path of the article and / or the radiation feeder 4.

  In the above embodiment, the radiation feeder 4 has been described as an example of the transport unit. However, the transport unit may be configured to transport articles by a coil unit (screw) that can be rotationally driven or a belt conveyor, for example. In the case of a coil unit, the feeder control unit 26 controls the number of revolutions (rpm) of the coil unit and the like as a feeding force. In the case of a belt conveyor, the feeder controller 26 controls the number of rotations of a roller that drives the belt.

  When a conveyance part is a coil unit or a belt conveyor, articles | goods are substantially equivalent in each mass like a chicken etc., for example. In the case of such an article, the coefficient A and the coefficient B are updated as follows. Below, the case where a conveyance part is a coil unit is demonstrated.

  The storage unit 22 stores the relationship between the number of articles supplied from the coil unit and the number of rotations (feed force) of the coil unit. The number of articles is acquired by image processing based on an image captured by a camera. When the unit weight of the article is constant, the number of articles may be acquired based on the weighing value of the article weighed by the weighing unit 11. The acquisition unit 24 updates the coefficient A and the coefficient B by learning. Specifically, the acquisition unit 24 stores, as history information, the actual supply amount when the rotation speed is controlled according to the number so as to be the target supply amount. That is, the acquisition unit 24 stores the rotation number and the number in the storage unit 22 in association with each other. The acquisition unit 24 calculates the coefficient A and the coefficient B based on such history information.

  In the above-described embodiment, the combination weighing device 1 includes the dispersion feeder 3 and the radial feeder 4 is described as an example of a circular arrangement in which the dispersion feeder 3 is arranged radially around the dispersion feeder 3. However, the combination weighing device may be in the form of a linear arrangement in which each of the conveyance unit and the weighing unit is arranged linearly.

  DESCRIPTION OF SYMBOLS 1 ... Combination measuring device, 4 ... Radiation feeder (conveyance part), 6 ... Weighing hopper (hopper), 7 ... Booster hopper (hopper), 11 ... Weighing part, 20 ... Control part, 24 ... Acquisition part, 28 ... Abnormality identification Part (control part), 30 ... setting part, 32 ... distance measuring sensor (detection part).

Claims (9)

A plurality of conveyance units for conveying articles;
A plurality of hoppers provided corresponding to each of the plurality of transport units, and temporarily storing the article transported by the transport 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 from the plurality of measurement values output by the measurement unit so that a total value becomes a target measurement value, and causes the hopper corresponding to the combination to discharge the article;
A plurality of associations between a set value relating to the power of the article set 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 parameter determined based on the history information, and an acquisition unit that acquires, for each transport unit, a parameter that is used when determining the feed force of the transport unit,
The control unit is a combination weighing device that compares the parameters for each of the conveyance units and identifies the conveyance unit in which an abnormality has occurred among the plurality of conveyance units.   The acquisition unit acquires the parameter that associates a relationship between a value obtained based on the information on the height of the article on the transport unit and the supply amount and a setting value related to the feeding force. Combination weighing device as described.   The control unit sets a parameter as a comparison reference based on at least a part of the parameters acquired for each of the transport units, and compares the parameter as the set comparison criterion with each of the parameters. The combination weighing device according to claim 1 or 2, wherein a conveyance unit in which an abnormality has occurred is identified from the plurality of conveyance units.   The said control part is a combination weighing | measuring apparatus as described in any one of Claims 1-3 which compares the said parameter for every said conveyance part using the said latest parameter acquired in the said acquisition part.   The combination weighing device according to any one of claims 1 to 4, wherein the control unit compares the parameters for each of the conveyance units acquired at the same timing by the acquisition unit.   The said control part is a combination weighing | measuring apparatus as described in any one of Claims 1-5 which compares the said parameter for every said conveyance part, after the said combination measurement is performed predetermined times.   When the control unit identifies the transport unit in which an abnormality has occurred from a plurality of the transport units, the control unit sets the parameter set in the identified transport unit to the transport unit different from the identified transport unit. The combination weighing device according to any one of claims 1 to 6, wherein the combination weighing device is replaced with a parameter calculated based on the set parameter.   The combination weighing device according to claim 7, wherein the control unit calculates an average value of the parameters set in the transport unit adjacent to the identified transport unit as the parameter related to replacement.   The said control part initializes the said parameter set to the specified said conveyance part, when the said conveyance part in which abnormality has generate | occur | produced from the said several conveyance part is specified. Combination weighing device according to item.

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