System to prevent incorrect input

Abstract

This invention provides a mis-loading prevention system that prevents mis-loading of raw materials at the factory receiving area by using only labels already attached to the containers, without requiring RFID or barcodes to be attached to the containers. [Solution] The mis-feed prevention system comprises a computer connected via a network, a higher-level computer positioned above the computer, and multiple mobile terminals. Each mobile terminal has an image acquisition unit capable of acquiring an image of a label attached to a container of accepted raw materials, and a character recognition function that reads the raw material information contained in the acquired label image. The higher-level computer transmits a work instruction sheet containing the raw material information to the computer. The computer comprises a comparison unit that compares the raw material information described in the work instruction sheet with the raw material information read by the character recognition function, and a notification unit that notifies the comparison result from the comparison unit.

Description

Technical Field

[0001] The present disclosure relates to an input error prevention system for preventing incorrect input of raw materials.

Background Art

[0002] This type of input error prevention system is known, for example, from Patent Document 1. In this system, an RF tag is attached to a container of a chemical which is a raw material, a signal transmitted from the RF tag is read by an RF signal sensor, and the correctness of the input raw material is determined based on the read result.

[0003] Also, for example, Patent Document 2 discloses a production line management system as another input error system. In this system, a barcode is attached to a bottle which is a container, the barcode attached to the bottle is read by a barcode reader, the read information is compared with the product type information, and the correctness of the raw material is determined.

[0004] By the way, consider a case where a plurality of types of raw materials are received at the receiving area of a factory, the received raw materials are stored in a warehouse by type, the raw materials to be input at one time (raw materials for one batch) are sorted on a pallet, for example, and the sorted raw materials are transported to an input port and each raw material is input from the input port.

[0005] In this case, when storing each of the raw materials received at the receiving area, it is common to compare / verify the product name, lot number, and serial number printed on the label attached to the container (a one-bushel can) of the raw material with the product name, lot number, and serial number in the work instruction (data).

[0006] When using the above-mentioned RFID or barcode at the time of comparison / verification, it is necessary to attach an RFID or barcode to the container. Therefore, when there are many containers to be received, it takes time and effort.

[0007] In some cases, barcodes are already printed on labels attached to the raw material containers. However, these barcodes are created for the convenience of the raw material manufacturer and lack the necessary information for comparison and verification at the factory, making them unsuitable for direct use. Therefore, it is virtually unavoidable to create new labels with barcodes at the receiving end, requiring the creation of these RFID labels and their subsequent application to the containers. When creating new labels, the product name, lot number, and serial number must be manually entered, potentially leading to the creation of incorrect labels. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2016-3077 [Patent Document 2] Japanese Patent Publication No. 2005-259161 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] Therefore, the purpose of this disclosure is to provide a mis-entry prevention system that can prevent mis-entry of raw materials by using only labels already attached to the containers at the time of raw material acceptance, without requiring RFID or barcodes to be attached to the containers of raw materials received at the factory's receiving entrance. [Means for solving the problem]

[0010] A first aspect of this disclosure relates to a misfeed prevention system for preventing multiple types of raw materials received at a factory receiving port from being mistakenly fed into the input port. The misfeed prevention system comprises a computer, a higher-level computer, and multiple handheld terminals, all connected via a network. Each handheld terminal has an image acquisition unit capable of acquiring images of labels attached to the containers of received raw materials, and a character recognition function that reads the raw material information contained in the acquired label images. The higher-level computer transmits a work order containing the raw material information to the computer. The computer comprises a comparison unit that compares the raw material information described in the work order with the raw material information read by the character recognition function, and a notification unit that notifies the comparison result from the comparison unit.

[0011] The second embodiment further has the following features in addition to those of the first embodiment: The raw material information includes the raw material name, quantity, lot number, and serial number. Each mobile terminal has a display order list that specifies the display order of the raw material name, quantity, lot number, and serial number, and is configured to individually image and read the raw material name, quantity, lot number, and serial number on the label in the display order specified in the display order list, display the read raw material name, quantity, lot number, and serial number respectively, and transmit them to a computer.

[0012] The third embodiment further has the following features in addition to those of the first embodiment: The raw material information includes the raw material name, quantity, lot number, and serial number. Each mobile terminal has a display position list that specifies the display positions for the raw material name, quantity, lot number, and serial number, and is configured to capture and read the raw material name, quantity, lot number, and serial number on the label all at once, display the read raw material name, quantity, lot number, and serial number at the display positions specified in the display position list, respectively, and transmit them to a computer.

[0013] The fourth embodiment further has the following features in addition to those of the first embodiment: The raw material information includes the raw material name, quantity, and serial number. The factory further includes a warehouse for storing multiple types of raw materials received at the receiving port, separated by type. Raw materials to be fed in at one time (i.e., one batch of raw materials) are prepared from the input port, and the prepared raw materials are transported to the input port and fed in. The portable terminal is configured to read the raw material name, serial number, and quantity of the raw materials to be prepared, and to count up the read quantity. The verification unit is configured to further verify the counted quantity with the quantity described in the work order.

[0014] The fifth embodiment further has the following features in addition to those of the fourth embodiment: The misfeed prevention system further includes a weighing unit that weighs the remaining raw material after a portion has been fed in at the input port. The portable terminal is configured to image and read the quantity displayed on the weighing unit. The computer is configured to rewrite the quantity of raw material included in the raw material information described in the work instructions with the quantity read by the portable terminal.

[0015] A sixth aspect of this disclosure relates to a misfeed prevention system for preventing multiple types of raw materials received at a factory receiving port from being mistakenly fed into the input port. The misfeed prevention system comprises a computer, a higher-level computer, and multiple mobile terminals, all connected via a network. Each mobile terminal has an image acquisition unit capable of acquiring images of labels attached to the containers of received raw materials, and is configured to transmit the acquired label images to the computer. The higher-level computer has a character recognition function that reads raw material information contained in the label images received from each mobile terminal, a comparison unit that compares the raw material information described in the work instructions with the raw material information read by the character recognition function, and a notification unit that notifies the comparison results from the comparison unit. [Effects of the Invention]

[0016] According to the first or sixth aspect of this disclosure, a mis-loading prevention system can be provided that prevents mis-loading of raw materials by using only labels already affixed to the containers at the time of raw material acceptance, without requiring RFID or barcodes to be attached to the containers of raw materials received at the factory's receiving entrance.

[0017] According to the second embodiment, the raw material name, quantity, lot number, and serial number on the label can be individually imaged and read in accordance with the display order specified in the display order list, thereby enabling verification.

[0018] As in the second embodiment, if the raw material name, quantity, lot number, and serial number on the label are captured and read individually, the number of times the user has to capture images increases. According to the third embodiment, the raw material name, quantity, lot number, and serial number can be captured and read all at once, which reduces the number of images compared to the second embodiment and thus improves usability.

[0019] According to the fourth embodiment, it becomes possible to sort raw materials at the factory receiving entrance using only the labels already attached to the containers at the time of receipt, without attaching RFID or barcodes to the containers of raw materials received, and as a result, it becomes possible to prevent incorrect loading.

[0020] Incidentally, not all of the raw materials transported to the input port are fed in; sometimes only a portion is fed in. In this case, the remaining raw materials should not be discarded but should be returned to the warehouse. From the fifth perspective, the remaining raw materials can be returned to the warehouse without attaching RFID or barcodes to the containers of raw materials received at the factory's receiving port. [Brief explanation of the drawing]

[0021] [Figure 1] This figure shows an example of a factory to which the mis-feed prevention system according to the embodiment is applied. [Figure 2] This figure shows an example configuration of a system to prevent incorrect input according to an embodiment. [Figure 3] This figure shows an example of the display on the receiving unit. [Figure 4] It is a diagram showing an example of the display on the display unit of the tablet terminal at the time of reception. [Figure 5] It is a diagram showing an example of the display on the display unit at the time of receiving the load. [Figure 6] It is a diagram showing an example of the hardware configuration of a computer. [Figure 7] It is a diagram showing a configuration example of an incorrect insertion prevention system according to a modification example.

Mode for Carrying Out the Invention

[0022] Hereinafter, with reference to the drawings, taking as an example the case where it is applied to a factory that manufactures products by charging a batch of raw materials from an input port, the incorrect insertion prevention system according to the embodiment of the present disclosure will be described. In each figure, the same reference numerals are assigned to common or corresponding elements to simplify or omit the description.

[0023] FIG. 1 is a diagram showing an example of a factory 1 to which the incorrect insertion prevention system 2 according to the embodiment is applied. The factory 1 has, for example, a receiving area 11, a warehouse 12, and a manufacturing site 13 having an input port 131. Note that the factory 1 is not limited to the example shown in FIG. 1.

[0024] In the receiving area 11, a container of raw materials (hereinafter also referred to as "raw material container") 10 carried in by a truck is received. The raw material container 10 is, for example, a 100-liter can, and different types of raw materials A and B are stored inside. A label 100 is attached to one side surface of the raw material container 10. On the label 100, for example, raw material information such as a barcode 101, a product name 102, a weight 103 as a quantity, a lot number 104, a serial number 105, and an explanatory item 106 is printed.

[0025] The raw material containers 10 received at the receiving port 11 are stored in the warehouse 12. In the warehouse 12, multiple raw material containers 10 are stored on pallets 121, 122, for example, according to the type of raw material A and B. Furthermore, in the warehouse 12, the raw material containers 10 for raw materials to be introduced at one time (one batch of raw materials) from the input port 131 are arranged on pallet 123. The arranged multiple (four in the example shown in Figure 1) raw material containers 10 are transported to the manufacturing site 13 along with pallet 123. The raw material containers 10 transported to the manufacturing site 13 are introduced from the input port 131.

[0026] Figure 2 shows an example of the configuration of the mis-insertion prevention system 2 according to an embodiment. The mis-insertion prevention system 2 comprises a computer 22 connected via a network, a higher-level computer 21 positioned above the computer 22, and a number of portable terminals 23.

[0027] The higher-level computer 21 is a control device that provides overall control of factory 1. The higher-level computer 21 has a transmission unit 211 that transmits work instructions containing raw material information to computer 22. The work instructions contain instructions regarding raw materials to be received at the receiving entrance 11 and instructions regarding raw materials to be prepared at warehouse 12. These work instructions are created according to a format established by factory 1. Since the work instructions themselves are publicly known, further detailed explanation is omitted.

[0028] Computer 22 includes a transmitting / receiving unit 221, a matching unit 222, and a notification unit 223. The transmitting / receiving unit 221 is configured to perform, for example, receiving work instructions transmitted from the host computer 21, receiving raw material information transmitted from each mobile terminal 23, transmitting a reading order list or raw material information definition list to each mobile terminal 23, transmitting the matching results verified by the matching unit 222 to the mobile terminal 23, and transmitting alarm information generated by the notification unit 223 to the mobile terminal 23. The reading order list and raw material information definition list can be created in advance by computer 22 or received and acquired from the host computer 21.

[0029] Each mobile terminal 23 is, for example, a handheld terminal (see Figure 1) or a tablet terminal (see Figure 4). Each mobile terminal 23 has a camera 231 as an image acquisition unit, a character recognition function 232, a display unit 233, and a transmitting / receiving unit 234. The camera 231 is capable of capturing images of the label 100 attached to the container 10. The character recognition function 232 is, for example, an optical character recognition (OCR) function, and is configured to read the raw material information contained in the image of the label 100 captured by the camera 231. Since known optical character recognition functions of this type can be used, a detailed explanation is omitted here. The display unit 233 can display a receiving screen to be shown when raw materials are received and a packing screen to be shown when the goods are packed. The transmitting / receiving unit 234 is configured to receive a reading order list and / or a raw material information definition list.

[0030] Figure 3 shows an example of the display on the display unit 233 during receiving. As shown in Figure 3, the receiving screen is displayed on the display unit 233 during receiving. The receiving screen has a product name display field 233a, a weight display field 233b, a lot number display field 233c, and a serial number display field 233d. The product name display field 233a displays the product name read from the captured image by the character recognition function 232. Similarly, the weight, lot number, and serial number read from the captured image are displayed in each of the display fields 233b, 233c, and 233d, respectively.

[0031] Here, the reading order list received by the transmitting / receiving unit 234 describes the reading order of the raw material information, name, weight, lot number, and serial number, that is, the imaging order by the camera 231. The receiving worker operating the mobile terminal 23 sequentially images the name, weight, lot number, and serial number of the label 100 according to the reading order displayed on the display unit 233. If the reading order (imaging order) is incorrect, an error message can be displayed. Once the name, weight, lot number, and serial number are all displayed in each display field 233a to 233d, the receiving worker presses the transmit button on the mobile terminal 23 to send the raw material information, such as the name, read from the label 100 to the computer 22.

[0032] The verification unit 222 of the computer 22 compares the raw material information written in the work instruction sheet with the raw material information read by the character recognition function 232 of the mobile terminal 23, and the verification result (correct or incorrect) from the verification unit 222 is notified by the notification unit 223. The notification unit 223 transmits the verification result from the transmission / reception unit 221 to the mobile terminal 23. The transmitted verification result is received by the transmission / reception unit 234 of the mobile terminal 23 and displayed on the display unit 233. Upon receiving the verification result, the receiving worker can either continue receiving or redo the receiving process.

[0033] Furthermore, if a tablet device with a wider imaging range than a handheld terminal is used as the mobile terminal 23, it is possible to image the labels 100 all at once. In this case, if the labels 100 are imaged sequentially according to the reading order list, as in the case of using the labels 100 described above, the number of images taken will increase.

[0034] Therefore, as shown in Figure 4, when a tablet terminal is used as the mobile terminal 23, it is preferable to refer to the raw material information definition list received by the transmitting / receiving unit 234. The raw material information definition list defines what characters, numbers, symbols, and their quantities make up the raw material name, weight, lot number, and serial number. In the example shown in Figure 1, the raw material name consists of three letters of the alphabet, three digits, and five digits connected by a hyphen. The lot number consists of six digits, and the serial number starts and ends with one letter of the alphabet, with five digits in between. The raw material information definition list describes how the raw material information is defined in this way. By referring to the raw material information definition list, it is possible to identify whether the characters read from the captured image are the raw material name, weight, lot number, or serial number, and the identified raw material information, such as the raw material name, is displayed in the predetermined display fields 233a to 233d. Once all display fields 233a to 233d are filled, the receiving worker presses the send button on the mobile terminal 23 to send the raw material information, such as the product name, read from the label 100, to the computer 22. This allows for the raw material information to be read by scanning the label 100 all at once, reducing the number of scans required and thus improving usability.

[0035] Figure 5 shows an example of the display on the display unit 233 during loading. As shown in Figure 5, when loading two types of raw materials A and B onto a pallet 123, first, when placing raw material A on the pallet 123, the label 100 of raw material A is captured by the camera 231 of the mobile terminal 23, and the raw material name, weight, lot number, and serial number read from the captured image are displayed in the respective display fields 233a to 233d on the loading screen (raw material A). If multiple containers 10 of raw material A are placed, the total weight is displayed by counting up the weights displayed in display field 233b. Then, when the loading worker presses the transmit button on the mobile terminal 23, the raw material information such as the name of raw material A read from the label 100 is sent to the computer 22.

[0036] The verification unit 222 of the computer 22 compares the raw material information written on the work instruction sheet with the raw material information read by the character recognition function 232 of the mobile terminal 23, and the verification result (correct or incorrect) from the verification unit 222 is notified by the notification unit 223. If the verification result is correct, the loading screen (raw material B) is displayed on the display unit 233, and the containers 10 of raw material B are placed on the pallet 123. At this time, the label 100 of raw material B is photographed by the camera 231 of the mobile terminal 23, and the raw material name, weight, lot number, and serial number read from the captured image are displayed in the respective display fields 233a to 233d of the loading screen (raw material B). If multiple containers 10 of raw material B are placed, the total weight is displayed by counting up the weights displayed in display field 233b. Then, when the loading worker presses the transmit button on the mobile terminal 23, the raw material information such as the name of raw material B read from the label 100 is transmitted to the computer 22.

[0037] The verification unit 222 of the computer 22, as in the case of receiving, verifies the raw material information written on the work instruction sheet with the raw material information read by the character recognition function 232 of the mobile terminal 23, and notifies the verification result (correct or incorrect) by the verification unit 222 via the notification unit 223. The notification unit 223 transmits the verification result from the transmission / reception unit 221 to the mobile terminal 23. The transmitted verification result is received by the transmission / reception unit 234 of the mobile terminal 23 and displayed on the display unit 233. Upon receiving the display of the verification result, the packing worker can either take the container 10 on the pallet 123 out of the warehouse along with the pallet 123 and transport it to the input port 131 of the manufacturing site 13, or redo the packing.

[0038] Figure 6 shows an example of the hardware configuration of computer 22. Each of the functions of computer 22 described above can be realized by the processing circuit 220 shown in Figure 6. This processing circuit 220 may be dedicated hardware 220a. This processing circuit 220 may also include a processor 220b and memory 220c. This processing circuit 220 may be partially formed as dedicated hardware 220a and further include a processor 220b and memory 220c. In the example shown in Figure 6, part of the processing circuit 220 is formed as dedicated hardware 220a, and the processing circuit 220 also includes a processor 220b and memory 220c. The processing circuit 220 may be at least one dedicated hardware 220a. In this case, the processing circuit 220 may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof. The processing circuit 220 may also include at least one processor 220b and at least one memory 220c. In this case, each function of the computer 22 is realized by software, firmware, or a combination of software and firmware. The software and firmware are written as programs and stored in memory 220c. The processor 220b realizes each function of the computer 22 by reading and executing the programs stored in memory 220c. The processor 220b is also called a CPU (Central Processing Unit), processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. Memory 220c includes storage devices such as RAM, ROM, flash memory, EMROM, EEMrOM, and other non-volatile or volatile semiconductor memory. In this way, the processing circuit 220 can realize each function of the computer 22 by hardware, software, firmware, or a combination thereof.

[0039] As described above, according to this embodiment, it is possible to provide a mis-entry prevention system 2 that can prevent mis-entry by using only the label 100 already attached to the container 10 of raw materials at the time of receipt, without attaching RFID or barcodes to the container 10 of raw materials received at the receiving entrance 11 of the factory 1.

[0040] Furthermore, the raw material name, weight, lot number, and serial number of label 100 can be individually scanned and read by camera 231 according to the display order specified in the display order list, thereby enabling verification. When a tablet device is used as the mobile terminal 23, the raw material name, weight, lot number, and serial number can be scanned and read all at once by camera 231, reducing the number of scans required and improving usability.

[0041] Although embodiments of the present disclosure have been described above, the present disclosure is not limited to the embodiments described above, and can be implemented in various modified forms without departing from the spirit of the present disclosure. In the above embodiments, the case in which all of one batch of raw materials is put in from the input port 131 was described as an example, but there are cases in which not all of the raw materials transported to the input port 131 are put in, and only a portion of the raw materials are put in. In this case, the remaining raw materials should not be discarded, but should be re-stored in the warehouse 12. Therefore, a weighing unit 132 is further provided to weigh the remaining raw materials that have been partially put in from the input port 131. The portable terminal 23 captures and reads the weight displayed on the weighing unit 132 and transmits it to the computer 22. The computer 22 is configured to rewrite the weight included in the raw material information described in the work instruction sheet with the weight read by the portable terminal 23. As a result, the remaining raw materials can be re-stored in the warehouse 12 without attaching RFID or barcodes to the containers of raw materials received at the receiving port 11 of the factory 1.

[0042] Furthermore, in the above embodiment, weight 103 was used as an example of the quantity included in the raw material information, but weight 103 is merely one example of quantity, and other quantities such as number of pieces (quantity), volume, or length (object length) can be used as raw material information.

[0043] Furthermore, although the above embodiment was described using the case where the mobile terminal 23 has a character recognition function 232 as an example, as shown in Figure 7, the computer 22 may have a character recognition function 224 equivalent to the character recognition function 232. In this case, the mobile terminal 23 is configured to transmit an image of the label 100 captured by the camera 231 to the computer 22 via the transmitting / receiving unit 234. The computer 22 can be configured to receive the image of the label 100 via the transmitting / receiving unit 221, read the raw material information contained in the received image of the label 100 using the character recognition function 224, compare it using the recognized raw material information with the matching unit 222, and transmit the matching result to the mobile terminal 23. This provides the following advantages in addition to the advantages obtained in the above embodiment. That is, since the character recognition function 224 only needs to be implemented in the computer 22, it does not need to be implemented in each mobile terminal 23, which is advantageous when there are many mobile terminals 23.

[0044] Furthermore, although the above embodiments and modifications were described using a camera 231 as the image acquisition unit as an example, any device capable of acquiring images of labels is acceptable, and an image scanner or handheld scanner can be used instead of the camera 231.

[0045] Furthermore, when the number of elements, quantities, amounts, ranges, etc., are mentioned in the embodiments described above, the invention is not limited to the number mentioned unless it is specifically stated or clearly defined in principle. Also, the structures, etc., described in the embodiments described above are not necessarily essential to the invention unless they are specifically stated or clearly defined in principle. [Explanation of Symbols]

[0046] 1...Factory, 10...Raw material container, 100...Label, 101...Barcode, 102...Product name, 103...Weight (volume), 104...Lot number, 105...Serial number, 11...Receiving entrance, 12...Warehouse, 121, 122, 123...Pallet, 13...Manufacturing site, 131...Input port, 132...Weighing unit, 2...Incorrect input prevention system, 21...Host computer, 22...Computer, 221...Transmit / receive unit, 222...Verification unit, 223...Notification unit, 23...Mobile terminal, 231...Camera (image acquisition unit), 232...Character recognition function, 233...Display unit, 233a...Product name display field, 233b...Weight display field, 233c...Lot number display field, 233d...Serial number display field, 234...Transmit / receive unit

Claims

1. A misfeed prevention system that prevents multiple types of raw materials received at the receiving entrance of a factory from being mistakenly fed into the input port, It comprises a computer connected via a network, a higher-level computer that is above the computer, and multiple mobile terminals, Each mobile terminal has an image acquisition unit capable of acquiring an image of the label attached to the container of the accepted raw material, and a character recognition function that reads the raw material information contained in the acquired label image. The aforementioned higher-level computer is configured to transmit work instructions containing raw material information to the computer. The computer is a misfeed prevention system comprising: a comparison unit that compares raw material information described in the work instruction sheet with raw material information read by the character recognition function; and a notification unit that notifies the result of the comparison by the comparison unit.

2. In the mis-insertion prevention system according to claim 1, The aforementioned raw material information includes the name of the raw material, the quantity, the lot number, and the serial number. A misfeed prevention system configured such that each mobile terminal has a display order list that specifies the display order of raw material name, quantity, lot number, and serial number, and reads the raw material name, quantity, lot number, and serial number on the label individually in the display order specified in the display order list, displays the read raw material name, quantity, lot number, and serial number respectively, and transmits them to the computer.

3. In the mis-insertion prevention system according to claim 1, The aforementioned raw material information includes the name of the raw material, the quantity, the lot number, and the serial number. Each mobile terminal has a raw material information definition list that defines the raw material name, quantity, lot number, and serial number. The system is configured to capture the raw material name, quantity, lot number, and serial number on the label all at once, identify and read the raw material name, quantity, lot number, and serial number by referring to the raw material information definition list, display the read raw material name, quantity, lot number, and serial number, and transmit it to the computer.

4. A system for preventing incorrect input according to claim 1, wherein the factory further comprises a warehouse for storing multiple types of raw materials received at the receiving port, sorting the raw materials to be input in one go from the input port, and transporting the sorted raw materials to the input port for input, The aforementioned raw material information includes the name of the raw material, the quantity, and the serial number. Each mobile terminal is configured to read the name, serial number, and quantity of the raw materials to be prepared, count up the read quantity, and transmit it to the computer. The aforementioned verification unit is configured to further verify the counted quantity with the quantity described in the work instruction sheet, thus preventing incorrect input.

5. In the mis-insertion prevention system according to any one of claims 1 to 4, The system further includes a weighing unit for weighing the remaining raw material after a portion has been introduced through the aforementioned input port. Each portable terminal is configured to capture and read the quantity displayed on the weighing unit. The computer is configured as a mis-feed prevention system that overwrites the quantity of raw materials included in the raw material information described in the work instruction sheet with the quantity read by the mobile terminal.

6. A misfeed prevention system that prevents multiple types of raw materials received at the receiving entrance of a factory from being mistakenly fed into the input port, It comprises a computer connected via a network, a higher-level computer that is above the computer, and multiple mobile terminals, Each mobile terminal has an image acquisition unit capable of acquiring an image of the label affixed to the container of accepted raw materials, and is configured to transmit the acquired label image to the computer. The aforementioned higher-level computer is configured to transmit work instructions containing raw material information to the computer. The aforementioned computer, Character recognition function that reads ingredient information contained in the label image received from each mobile device, A comparison unit that compares the raw material information described in the work instruction sheet with the raw material information read by the character recognition function, A notification unit that notifies the verification result from the verification unit, A system for preventing incorrect input.

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