JP7300593B2 - Mounting equipment and acquisition method of trace data - Google Patents

Description

The present invention relates to a component mounting apparatus for mounting components on a substrate and a component mounting system including the component mounting apparatus, and a trace data acquisition method for acquiring production history data.

In recent years, in the electronic device manufacturing industry, there is a demand for ensuring so-called traceability, which enables retrospective tracking of production history, as well as quality control for individual products, in order to ensure the quality of products. For example, in a component mounting system that manufactures mounting boards, the component to be mounted is recognized before component mounting and it is determined whether or not it is the correct component, in order to prevent mounting errors caused by mixing up the wrong component. It has been proposed to do so (see, for example, Patent Document 1). In the prior art shown in this patent document example, characters and figures printed on the surface of a component are imaged and recognized by a component mounting apparatus, and based on the recognition result, it is determined whether or not the component is correct. . As a result, there is an advantage that the correctness of the component can be determined without requiring identification information such as a barcode for identifying the tray in which the component is stored.

JP 2013-115337 A

However, although it is possible to determine the correctness of a part by recognizing the part in the prior art, including the examples of the above-mentioned patent documents, no consideration has been given to measures for reflecting the result of part recognition in the production history data. That is, in the prior art, as a measure for generating production history data in order to ensure traceability, an operator uses a barcode reader to read barcodes attached as identification information to supply reels and trays for supplying parts. It was necessary to read it by , and send it to the host system. Since this reading operation is a complicated work that is frequently required each time parts are replaced, there has been a demand for a measure capable of generating production history data without performing such work.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a component mounting apparatus and a trace data acquisition method capable of acquiring production history data without manually reading identification information such as a bar code.

The component mounting apparatus of the present invention includes: a component information recognition unit that recognizes the component information by imaging characters of component information printed on the surface of the component before being mounted on the board; a data output unit for outputting the obtained component information to a database, wherein the data output unit associates the recognized component information with the board information of the board on which the component is mounted, and outputs the information to the database. do.

A trace data acquisition method according to the present invention is a trace data acquisition method for acquiring production history data in a component mounting system including a component mounting apparatus, wherein the component applied to the surface of the component before being mounted on the board and a data output step of outputting the part information recognized in the part information recognition process to a database, wherein the database is the part information. and the board information of the board on which the component is mounted are linked and stored.

According to the present invention, production history data can be acquired without manually reading identification information such as barcodes.

1 is an explanatory diagram of the configuration of a component mounting system in which a component mounting apparatus according to an embodiment of the present invention is arranged; FIG. 1 is a plan view showing the configuration of a component mounting apparatus according to one embodiment of the present invention; Functional explanatory diagram of a component mounting apparatus according to one embodiment of the present invention 1 is a block diagram showing the configuration of a control system of a component mounting system according to one embodiment of the present invention; FIG. FIG. 2 is a flowchart showing recognition data creation processing used in the component mounting apparatus according to one embodiment of the present invention; FIG. 2 is a flowchart showing mounting operations by the component mounting apparatus according to one embodiment of the present invention; FIG. 2 is a flow diagram of component part number character inspection in the component mounting apparatus according to one embodiment of the present invention; FIG. 2 is a flowchart of lot number character recognition in the component mounting apparatus according to one embodiment of the present invention; FIG. 4 is an explanatory diagram of recognition processing executed in component part number character inspection in the component mounting apparatus according to one embodiment of the present invention; Explanatory drawing of lot number character recognition processing in the component mounting apparatus of one embodiment of the present invention FIG. 2 is an explanatory diagram of a traceability function based on trace data generated by the component mounting apparatus according to one embodiment of the present invention;

Embodiments of the present invention will now be described with reference to the drawings. First, the configuration of a component mounting system 1 will be described with reference to FIG. The component mounting system 1 has a function of manufacturing a mounting board by mounting an electronic component on the board. The component mounting system 1 includes a component mounting line 1a to which a plurality of component mounting apparatuses to be described below are connected, a host system 3 connected to the plurality of component mounting apparatuses via a communication network 2, and data generation. A device 4 is provided. The host system 3 functions as a server for exchanging data with the component mounting line 1a. The data creation device 4 has a function of creating production data such as mounting data and recognition data used in each device of the component mounting line 1a.

The configuration of the component mounting line 1a will be described. The component mounting line 1a connects in series a substrate supply device M1, a substrate delivery device M2, a printing device M3, a printing inspection device M4, a component mounting device M5 and M6, a mounting state inspection device M7, a reflow device M8, and a substrate recovery device M9. is configured as

The substrate supplied by the substrate supply device M1 is carried into the printing device M3 via the substrate delivery device M2, where the solder printing operation of screen-printing solder for joining components onto the substrate is performed. The board after solder printing is transferred to the print inspection device M4, where the print inspection work of the solder printed on the board is performed. After the printing inspection, the board is sequentially transferred to the component mounting apparatuses M5 and M6, where the mounting work of mounting the components on the board after the solder printing is performed.

The board on which the components have been mounted is carried into the mounting state inspection device M7, where the mounting state inspection work of the components mounted on the board is performed. After the mounting state inspection, the substrate is carried into the reflow device M8, where it is heated according to a predetermined heating profile, thereby melting and solidifying the solder for joining the components. As a result, the component is soldered to the board, and the mounted board with the component mounted on the board is completed and collected by the board collecting device M9.

The configuration of the component mounting apparatuses M5 and M6 will be described with reference to FIG. In FIG. 2, a substrate transfer mechanism 6 is arranged in the X direction (substrate transfer direction) on the upper surface of the base 5, and the substrate transfer mechanism 6 transfers a substrate 7 on which components are to be mounted. It is positioned and held at the working position by the component mounting mechanism to be described. On both sides of the substrate transfer mechanism 6, component supply units 8A and 8B for supplying components to be mounted on the substrate 7 are arranged.

A tray feeder 9 is arranged in the component supply section 8A, and a plurality of tape feeders 11 are arranged in the component supply section 8B. A tray feeder 9 feeds a tray 10 in which components 20 are stored in a lattice arrangement to a component pick-up position by a component mounting mechanism. As a result, the component 20 held on the tray 10 is sent to the pickup position by the mounting head of the component mounting mechanism. The tape feeder 11 feeds the components to the component mounting mechanism by pitch-feeding the carrier tape holding the components.

A Y-axis moving table 13 driven by a linear motor is arranged in the Y direction at one end of the base 5 in the X direction. Two X-axis moving tables 14A and 14B are connected to the Y-axis moving table 13 so as to be movable in the Y direction corresponding to the component supply units 8A and 8B, respectively. Mounting heads 15A and 15B are mounted on the X-axis moving tables 14A and 14B so as to be movable in the X direction by a linear driving mechanism. Each of the mounting heads 15A and 15B is a multiple type head having a plurality of unit transfer heads 16, and suction nozzles 16a (see FIG. 3) are exchangeably mounted on the lower ends of the respective unit transfer heads 16. It is

By driving the Y-axis moving table 13 and the X-axis moving table 14A, the mounting head 15A horizontally moves between the component supply section 8A and the substrate 7 held by the substrate transport mechanism 6. FIG. As a result, the component 20 stored in the tray 10 is picked up by suction and held by the suction nozzle 16 a and mounted on the substrate 7 . By driving the Y-axis moving table 13 and the X-axis moving table 14B, the mounting head 15B moves horizontally between the component supply section 8B and the substrate 7. FIG. As a result, the component is picked up from the carrier tape fed by the tape feeder 11 while being sucked and held by the suction nozzle 16a, and mounted on the substrate 7. As shown in FIG. Therefore, the Y-axis moving table 13, the X-axis moving tables 14A and 14B, and the mounting heads 15A and 15B form a component mounting mechanism 12 (FIG. 4) that sucks and holds components by means of the suction nozzles 16a of the unit transfer heads 16 and mounts them on the board 7. ).

The mounting heads 15A and 15B are provided with a substrate recognition camera 17 which is located on the lower surface side of the X-axis moving tables 14A and 14B and moves integrally with the mounting heads 15A and 15B. The board recognition camera 17 moves above the board 7 together with the mounting heads 15A and 15B, and the position of the board 7 is recognized by imaging the board 7 with the board recognition camera 17 here. Further, by photographing the component 20 with the board recognition camera 17 in the component supply units 8A and 8B, the character of the component part number and the character of the lot number, which will be described later, are recognized.

A component recognition camera 18 is arranged between the component supply units 8A and 8B and the board transfer mechanism 6. As shown in FIG. As the mounting heads 15A and 15B holding the components move above the component recognition camera 18, the component recognition camera 18 images these components. By performing recognition processing on the imaging result, identification and position recognition of the components held by the mounting heads 15A and 15B are performed.

Next, with reference to FIG. 3, the component mounting operation in the component mounting apparatuses M5 and M6 and the component recognition operation performed during the component mounting operation will be described. In this embodiment, when taking out a component from the component supply units 8A and 8B, the component number printed on the component and the lot number, which is component information for individually identifying the component, are recognized.

By comparing the recognized part number with the regular part number, erroneous mounting of different parts is prevented, and the recognized lot number is transferred to the host system 3 as trace data indicating the production history. there is Although the component mounting operation for the component supply section 8A is described here as an example, the same applies to the case where the component supply section 8B is targeted.

When picking up the component, the component mounting mechanism 12 is driven to move the mounting head 15A to the component supply section 8A as shown in FIG. 3(a). Before the component 20 to be taken out stored in the tray 10 is sucked by the suction nozzle 16 a of the unit transfer head 16 , the board recognition camera 17 is positioned above the component 20 to image the component 20 .

As shown in FIG. 3(b), a polarity mark 20a is provided on the upper surface of the component 20, and furthermore, a component part number character string 22 and a lot number character string 23 are printed. The part number character string 22 and the lot number character string 23 are printed in areas 22 a and 23 a preset on the upper surface of the tray 10 . Character images of the part number character string 22 and the lot number character string 23 can be acquired by capturing the image information in the areas 22a and 23a in the image of the part 20 captured.

A component 20 for which it is confirmed that the part number character string 22 matches the regular part number in the character recognition, is to be mounted. That is, the unit transfer head 16 is moved above the component 20, and the component 20 is sucked and held by the suction nozzle 16a. Then, the unit transfer head 16 holding the component 20 is moved above the component recognition camera 18, and after detecting the positional deviation of the tray 10 in the mounting head 15A, as shown in FIG. The head 16 is moved above the substrate 7 and the held component 20 is mounted on the mounting point of the substrate 7 .

Next, the configuration of the control system of the component mounting system 1 will be described with reference to FIG. Here, only elements related to the component mounting apparatuses M5 and M6 among the equipment constituting the component mounting system 1 are explained. In FIG. 4, a communication unit 30, which is a communication interface of the component mounting apparatuses M5 and M6, is connected to the host system 3 and the data creation device 4 via the component 20. FIG.

The host system 3 is a server having a trace database 3a, and stores production history information transferred from the component mounters M5 and M6, that is, board information specifying individual boards, date of manufacture, and parts mounted on each board. data such as part numbers and lot numbers are stored as trace data. The data creation device 4 creates data used for production of mounted boards in the component mounting devices M5 and M6, that is, production data such as mounting data and recognition data. The created data is downloaded to the component mounting apparatuses M5 and M6 via the communication network 2. FIG.

The configuration of the component mounting apparatuses M5 and M6 will be described. The component mounting apparatuses M5 and M6 are provided with a control section 31, a storage section 32, a mechanism driving section 39, and a recognition processing section 40. FIG. The control unit 31 is a CPU having an arithmetic processing function, and controls various processes and operations for manufacturing mounting boards based on various data stored in the storage unit 32 . The mechanism drive section 39 is a driver, and drives the board transfer mechanism 6, the component supply section 8A, and the component mounting mechanism 12. FIG. The recognition processing unit 40 performs recognition processing on images captured by the board recognition camera 17 and the component recognition camera 18 . Here, the recognition processing unit 40 executes recognition processing for the purpose of recognizing the positions of the component 20 and the substrate 7, and recognition processing of the component number character string 22 and the lot number character string 23 printed on the component 20 is performed by the control unit. 31 is performed by a dedicated recognition processing function.

Data stored in the storage unit 32 will be described. The storage unit 32 includes a production data storage unit 36 and an acquired character image storage unit 38 . Data generated by the data generation device 4 is transferred to the production data storage unit 36 . The production data storage unit 36 stores mounting data 36a, board information 36b, and recognition data 37. FIG. The board information 36b is information including the type and size of the board to be produced, the board ID, and the like. The mounting data 36a includes the component name of the component to be mounted on each board, the component number character string 22, the lot number character string 23, mounting position data on the board, data indicating the component supply form in the component supply units 8A and 8B, and the like. is. In this embodiment, the recognition data 37 described below is defined as part of the production data stored in the production data storage unit 36. As shown in FIG.

The recognition data 37 is data used for recognizing the part number for preventing incorrect mounting and for recognizing the lot number for obtaining trace data. The recognition data 37 includes recognition target data 37a, part number character type information 37b, lot number character type information 37c, and recognition parameters 37d. The recognition object data 37a is whether or not the part number character string 22 printed on each part is to be inspected (part number inspection ON), and whether or not the lot number character string 23 is to be recognized (character recognition is ON). to identify At the same time, if it is to be inspected or recognized, it contains area designation data specifying areas 22a and 23a (see FIG. 3B) in which the part number character string 22 and the lot number character string 23 are printed. there is

The part number character type information 37b is information that defines the character type for each digit position of each character constituting the part number character string 22 . Here, as the character type, three types of English capital letters, English letters, and numerals are used. That is, the storage unit 32 stores character type information that defines the type of character type for each digit of the regular part number. In this embodiment, the processing function of the character type information generation unit 34c, which will be described later, automatically generates character type information based on the regular part number character string 22 input by the user.

The lot number character type information 37c is information that defines the character type for each digit position of each character forming the lot number character string 23 . Here, similarly, three types of English uppercase letters, English letters, and numerals are used. If necessary, symbols such as slashes and hyphens may be used in addition to these three types. That is, the character type used here includes at least numerals and uppercase and lowercase letters of the alphabet.

The recognition parameter 37d is a parameter that defines a recognition condition for individually recognizing each character that constitutes the part number character string 22 and the lot number character string 23. FIG. The recognition parameters include character orientation, character contrast, size, and the like. The acquired character image storage unit 38 stores a plurality of imaged character images for character recognition of the part number character string 22 and the lot number character string 23 . In recognition processing by the part number recognition unit 34a and the lot number recognition unit 35a described below, the character image stored in the obtained character image storage unit 38 is read out and becomes the object of recognition processing.

The control unit 31 includes a mounting control unit 33 , a part number inspection processing unit 34 and a trace data processing unit 35 . The mounting control unit 33 controls the mechanism driving unit 39 based on the mounting data 36a and the board information 36b to drive the board transporting mechanism 6, the component supply unit 8A, and the component mounting mechanism 12, thereby executing the component mounting operation. be done.

The part number inspection processing unit 34 performs part number inspection, that is, whether or not the part number of the part to be inspected matches the regular part number, based on the recognition target data 37a, the part number character type information 37b, and the recognition parameter 37d. inspection. The part number inspection processing section 34 includes a part number recognition section 34a, a legitimate part determination section 34b, and a character type information generation section 34c. The part number recognizing unit 34a captures an image of the characters of the part number applied to the surface of the component by the board recognition camera 17, and stores the imaged character image for each digit in the part number character type information 37b stored in the storage unit 32. It has a function of recognizing the part number by performing recognition processing based on the number.

The authorized part determination unit 34b determines whether or not the part number character string 22 recognized by the part number recognition unit 34a matches the authorized part number. The mounting heads 15A and 15B are configured to mount the component 20 on the board 7 when the authorized component determination unit 34b determines that the component number character string 22 matches the authorized component number.

The character type information generation unit 34c performs processing for automatically creating character type information based on the regular part number input by the user. That is, the character type is determined from the identification result of the character of each digit of the input part number, and the character type information defining the character type of each digit is created.

The trace data processing unit 35 performs trace data processing, i.e., recognizes the lot number character string 23 of the part targeted for the trace data, based on the recognition target data 37a, the lot number character type information 37c, and the recognition parameter 37d, and outputs the recognition result. is processed to output The trace data processing unit 35 includes a lot number recognition unit 35a and a data output unit 35b.

The lot number recognition unit 35a is a component information recognition unit, and recognizes the lot number character string 23 by photographing the characters of the lot number character string 23, which is the component information printed on the surface of the component 20, by the board recognition camera 17. FIG. In this recognition, the lot number recognition unit 35a recognizes the lot number character string 23 based on the lot number character type information 37c stored in the storage unit 32. FIG. The lot number character type information 37c is input by the user via the data creation device 4. FIG.

The data output unit 35b outputs the lot number character string 23 recognized by the lot number recognition unit 35a to the host system 3, which is a server, together with the board information 36b of the board 7 on which the component 20 is mounted. In this data output, the data output unit 35b outputs the date of manufacture of the board 7 to the host system 3 together with the lot number character string 23 and the board information 36b, which are part information. there is As a result, it is possible to create trace data specifying the manufacturing history by manufacturing date.

Next, recognition data creation processing for creating recognition data to be stored in the recognition data 37 by the data creation device 4 will be described with reference to the flow of FIG. First, ON/OFF of part number character inspection and lot number character recognition is set (ST1). As a result, among the mounting target components to be mounted on the substrate 7, the components that require inspection to prevent incorrect mounting and the components that require the production history to be recorded in the trace data are specified.

Next, an area in which part number characters and lot number characters are printed is specified (ST2). That is, the positions of the areas 22a and 23a shown in FIG. 3B are input, and the area to be subjected to character recognition in the obtained character image is specified. Next, enter the correct part number character and lot number character string type (ST3). As for the part number characters, as shown in FIG. 9(a), a part number character string 22 in which individual part number characters are associated with each number of the digit number 22b is input. The character type input of the part number character string and lot number character string is performed by the user.

As for the character type of the lot number character string, as shown in FIG. 10(a), lot number character type information 37c corresponding to each number of the digit number 22b is entered. be done. In the character type of the lot number character string, the same number of the digit number 22b may be associated with two character types (for example, uppercase letters and numbers). This is because, when the lot number character string includes the month of manufacture, instead of using a two-digit number such as November to specify the month, capital letters are sometimes used in association with the number.

Next, recognition parameters used for part number character inspection and lot number character recognition are set (ST4). Here, items to be used as identification conditions at the time of image recognition, such as the orientation of characters in the printed state, the size of characters, the contrast and color tone of characters, are input. Then, the data created in this manner is transferred to the component mounting apparatus and stored in the recognition data 37 (ST5).

Next, the mounting operation performed in the component mounting system 1 shown in this embodiment will be described according to the flow of FIG. When the mounting operation is started, first, the part number character inspection of the part to be mounted is executed (ST20). That is, it is inspected whether or not the component to be mounted is a correct component having a regular component part number. Next, it is judged whether or not the inspection result is OK (ST21). If the inspection result is NG, an inspection result NG screen is displayed on the display units provided in the component mounting apparatuses M5 and M6, and the equipment is temporarily stopped (ST22). Then, after replacing the NG parts with the correct parts, the process returns to (ST20) and the inspection is executed again.

If the inspection result is OK in (ST20), lot number character recognition of the component to be mounted is executed (ST24). After that, the components to be mounted are picked up (ST25). That is, the component 20 is sucked and held by the suction nozzle 16 a of the unit transfer head 16 . Next, the component to be mounted is mounted (ST26). That is, the mounting heads 15A and 15B are moved to the substrate 7, and the component 20 held by the unit transfer head 16 is mounted on the mounting point of the substrate 7 as shown in FIG. 3(c) (ST26).

Next, it is determined whether or not the mounting of all the components to be mounted has been completed (ST27). If NO here, the processing after (ST20) is repeatedly executed. When the completion of mounting of all components to be mounted is confirmed in (ST27), the lot number recognition character strings of all recognized components are processed as trace data (production history data) by the data output unit 35b to the server (upper system 3). ). The trace data transferred to the host system 3 is stored in the trace database 3a (FIG. 4). This completes the mounting operation.

Next, the details of the part number character inspection shown in (ST20) in FIG. 6 will be described with reference to the flow of FIG. 7 and FIG. In FIG. 7, first, by referring to the data stored in the recognition target data 37a, it is determined whether or not the part number inspection is ON for the target part (ST30). Here, the following processing is executed for the part corresponding to the part number inspection ON. The following processing is skipped for parts for which the product number inspection is not ON.

First, from the production data stored in the production data storage unit 36, the part number character string of the part is obtained (ST31). As a result, as shown in FIG. 9(a), the part/part number character string 22 is obtained in which each digit of the digit number 22b is associated with the characters constituting the part/part number. Next, character type information for each digit position is generated from the obtained part number character string (ST32). As a result, as shown in FIG. 9B, part number character type information 37b is generated in which each digit of the digit number 22b is associated with the character type of each digit position. This processing is executed by the processing function of the character type information generating section 34c provided in the control section 31. FIG. The generated part number character type information 37 b is stored in the recognition data 37 . That is, here, character type information that defines the type of character type for each digit of the regular part number is stored (storage step).

Next, an image of the area where the part number characters are printed is obtained (ST33). That is, as shown in FIG. 9C, a captured image of an area 22a on which the part number character string 22 is printed on the upper surface of the part 20 is acquired from the acquired character image storage unit . Here, since the character at each digit position is determined by performing the recognition process multiple times, images for multiple candidates used for each recognition process are acquired.

FIG. 9(d) exemplifies a plurality of (here, two) candidate images (“candidate 1” 22c1, “candidate 2” 22c2) acquired in this manner. In "candidate 1" 22c1, each character of A8CO12 is obtained corresponding to digit positions 1-6. In addition, in "candidate 2" 22c2, each character of RBE0I6 is obtained corresponding to digit positions 1-6.

Then, character candidates at each digit position are recognized from the acquired image (ST34). Here, the recognition process for determining the character at each digit position is sequentially executed for each digit. That is, the characters of the part number applied to the surface of the part 20 are imaged, and the imaged character image for each digit is recognized based on the part number character type information 37b stored in the storage unit 32, thereby obtaining the part number. Recognize the character string 22 (part number recognition process).

In this process, the recognition process is executed using a plurality of recognition images as recognition character candidates, with a multi-digit character as a recognition target. Therefore, an index N indicating the processing order for sequentially targeting each digit position and an index M indicating the processing order for sequentially targeting each recognition character candidate are set.

First, N=1 is set (ST35), and the character type of the first digit is acquired (ST36). Here, the first digit character type "alphabet capital letter" is acquired from the part number character type information 37b shown in FIG. 9(b). Next, M is set to 1 (ST37), and the first recognition character candidate of the first digit is acquired (ST38). Here, the capital letter "A" in the first digit of the "candidate 1" 22c is obtained. Then, it is determined whether the character types match (ST39). That is, the character type of the acquired recognition character candidate and the character type indicated in the character type information are compared.

If the character types match here, the recognized character of the first digit is determined (ST40). In the example shown here, the character type (uppercase alphabet) of the obtained recognition character candidate matches the character type (uppercase alphabet) indicated in the character type information, so the recognition character for the first digit is uppercase alphabet. It is determined that it is "A" (see circled capital letter "A" in "candidate 1" 22c1 shown in FIG. 9(d)).

If the character types do not match in (ST39), M is incremented to set M=M+1 (ST41), and the next second recognition character candidate is obtained (ST38). For example, in the second digit recognition character candidate of "candidate 1" 22c1, the number "8", which is different from the character type (alphabetic capital letter) indicated in the character type information, is acquired, and the character type matching in (ST39) is obtained. It is judged to be inconsistent in judgment.

In this case, the uppercase letter "B" in the second digit of the "candidate 2" 22c2 is obtained, and the character type (uppercase letter) of the acquired recognition character candidate and the character Compare the character type (uppercase letters) indicated in the type information. Here, since the character types match, it is determined that the recognized character in the second digit is the capital letter "B" (in the "candidate 2" 22c2 shown in FIG. 9(d), the circled (see capital letter "B" marked with ).

In the above-described process, the part/part number recognition unit 34a sequentially extracts a plurality of candidates in accordance with the priority given in advance from the character images for each digit captured during the recognition process and stored in the acquired character image storage unit 38. Then, when the character type of the recognized character of the first candidate with the highest priority ("candidate 1" 22c1) matches the character type of the corresponding digit stored in the storage unit 32 as the part number character type information 37b, employs the recognized character of the first candidate as the part number character.

Then, the part/part number recognizing unit 34a recognizes the character type of the recognition character of the first candidate (“candidate 1” 22c1) with the highest priority, which is stored in the storage unit 32 as the part/part number character type information 37b. The second candidate ("candidate 2" 22c2), which does not match the type and has the next highest priority after the first candidate, is the character type of the corresponding digit stored in the storage unit 32 as the part number character type information 37b. , the recognized character of the second candidate is adopted as the part number character.

In this manner, similar recognition processing is repeatedly executed for character candidates at each digit position of interest. Here, among the recognition character candidates of "candidate 1" 22c1 shown in FIG. This indicates a case where the stored character type of the relevant digit matches. That is, each character in the 1st digit (capital letter A), 3rd digit (capital letter C), 5th digit (number 1), and 6th digit (number 2) circled in "candidate 1" 22c1 matches the character type shown in the part number character type information 37b. As a result, these recognized characters are adopted as the characters of the part number character string 22 .

On the other hand, among the recognition character candidates of "candidate 1" 22c1, the character type of the recognition character candidate in the 4th digit (English capital letter O) is the digit of the corresponding part number stored as the part number character type information 37b. Different from character type (number). Therefore, the character type of the recognition character candidate (number 0) corresponding to the fourth digit in the second candidate (“candidate 2” 22c2) having the next highest priority is compared. In this case, since the character type is numeric, the recognized character that has been recognized as a recognition character candidate (number 0) is adopted as the character of the part number character string 22 .

That is, in the above-described recognition processing, (ST38) and (ST39) are repeatedly executed to determine the recognized character of the Nth digit (ST40). Then, it is determined whether or not the recognized characters of all the digits have been confirmed (ST42), and by confirming that the recognized characters of all the digits have been confirmed, as shown in FIG. A recognized character string 22R is determined (ST44).

Then, the recognized character string 22R decided in this way becomes the object of judgment as to whether or not it matches the part number character string stored in the storage unit 32 (ST45). That is, it is determined whether or not the part number recognized in the part number recognition process matches the regular part number (legal part determination process). If a match is confirmed here, it is determined that the inspection result is OK (ST46), and the process proceeds to (ST24) in FIG.

Then, after passing through (ST24) described below, the parts to be mounted are sucked (ST25) and the parts to be mounted are mounted (ST16). That is, when it is determined in the regular component determination process that the part number matches the regular part number, the component 20 is mounted on the board 7 (mounting process). If they do not match, the inspection result is determined to be NG (ST47), and the process proceeds to (ST22) in FIG.

Next, the details of the lot number character recognition shown in FIG. 6 (ST24) and the trace data acquisition method for acquiring the production history data in the component mounting system 1 including the component mounting apparatuses M5 and M6 will be described with reference to the flow and diagram of FIG. 10 for explanation. In FIG. 8, first, by referring to the data stored in the recognition target data 37a, it is determined whether or not the target part is designated as lot number character recognition ON (ST50). Here, the following processing is executed for the parts corresponding to lot number character recognition ON. The following processing is skipped for parts for which lot number character recognition is not ON.

First, from the production data stored in the production data storage section 36, the character type information of each digit position of the lot number character of the part is obtained (ST51). That is, as shown in FIG. 10(a), lot number character type information 37c is obtained in which the character types of the characters constituting the lot number are associated with each digit position of the digit number 23b. The lot number character type information 37c is created in advance by the user's input using the data creation device 4 and stored in the storage unit 32 in advance. That is, here, the character type information defining the type of character type for each digit of the lot number, which is regular part information, is stored (storage step).

Next, an image of the area where the lot number characters are printed is obtained (ST52). That is, as shown in FIG. 10B, the captured image of the region 23a on which the lot number character string 23 is printed on the upper surface of the component 20 is obtained from the obtained character image storage unit 38. FIG. Here, since the character at each digit position is determined by performing the recognition process multiple times, images for multiple candidates used for each recognition process are acquired.

FIG. 10(c) exemplifies a plurality of (here, two) candidate images (“candidate 1” 23c1, “candidate 2” 23c2) acquired in this way. In "candidate 1" 23c1, each character of 8R46B is obtained corresponding to digit positions 1-5. In addition, in "candidate 2" 22c2, each character of BB688 is obtained corresponding to digit positions 1-5.

Then, a character candidate at each digit position is recognized from the acquired image (ST53). Here, the recognition process for determining the character at each digit position is sequentially executed for each digit. That is, the characters of the lot number applied to the surface of the component 20 are imaged, and the imaged character image for each digit is recognized based on the lot number character type information 37c stored in the storage unit 32, thereby obtaining the lot number. The character string 23 is recognized (component information recognition step).

In this process, the recognition process is executed using a plurality of recognition images as recognition character candidates, with a multi-digit character as a recognition target. Therefore, an index N indicating the processing order for sequentially targeting each digit position and an index M indicating the processing order for sequentially targeting each recognition character candidate are set.

First, N=1 is set (ST54), and the character type of the first digit is acquired (ST55). Here, the first digit character type "alphabet capital letter" is obtained from the lot number character type information 37c shown in FIG. 10(a). Next, M is set to 1 (ST56), and the first recognition character candidate of the first digit is obtained (ST57). Here, the first digit "8" of the "candidate 1" 23c1 is obtained. Then, it is determined whether the character types match (ST58). That is, the character type of the acquired recognition character candidate and the character type indicated in the character type information are compared.

In the example shown here, since the character type (number) of the acquired recognition character candidate does not match the character type (alphabetic capital letter) indicated in the character type information, M is incremented and set to M=M+1. (ST60), and the next second recognition character candidate is obtained (ST57). That is, the capital letter "B" in the first digit of the "candidate 2" 23c2 shown in FIG. 10(c) is acquired. Then, in (ST58), the character type (uppercase alphabet) of the acquired recognition character candidate and the character type (uppercase alphabet) indicated in the character type information are compared. Since the character types match here, it is determined that the recognized character in the first digit is the capital letter "B" (in the "candidate 2" 23c2 shown in FIG. 9(c), the circled (see capital letter "B" marked with ).

In the above-described process, the lot number recognition unit 35a sequentially extracts a plurality of candidates according to the priority given in advance from the character images for each digit captured during the recognition process and stored in the obtained character image storage unit 38. Then, when the character type of the recognized character of the first candidate with the highest priority ("candidate 1" 23c1) matches the character type of the corresponding digit stored in the storage unit 32 as the lot number character type information 37c, , the recognized character of the first candidate is adopted as the character of the lot number.

Then, the lot number recognition unit 35a recognizes the character type of the recognition character of the first candidate with the highest priority ("candidate 1" 23c1), and the character of the corresponding digit stored in the storage unit 32 as the lot number character type information 37c. The second candidate ("candidate 2" 23c2), which does not match the type and has the highest priority next to the first candidate, is the character type of the corresponding digit stored in the storage unit 32 as the lot number character type information 37c. If they match, the second candidate recognition character is adopted as the character of the lot number.

In this manner, similar recognition processing is repeatedly executed for recognition character candidates at each digit position of interest. Here, among the recognition character candidates of "candidate 1" 23c1 shown in FIG. indicates when the character type of the digit matches. That is, in the "candidate 1" 23c1, the character type of each character circled in the 2nd digit (uppercase letter R), 3rd digit (number 4), and 4th digit (number 6) is the lot number character type information. It matches the character type shown in 37c. As a result, these recognized characters are adopted as lot number characters.

On the other hand, among the recognition character candidates of "candidate 1" 23c1, the character type of the recognition character candidate in the 5th digit (English capital letter B) is the digit of the corresponding lot number stored as the lot number character type information 37c. Different from character type (number). Therefore, the character type of the corresponding recognized character candidate (number 8) in the fifth digit in the second candidate (“candidate 2” 23c2) having the next highest priority is compared. In this case, since the character type is numeric, the recognized character that is recognized as the recognition character candidate (number 8) is adopted as the character of the lot number.

That is, in the above-described recognition processing, (ST57) and (ST58) are repeatedly executed to determine the recognized character of the Nth digit (ST59). Then, it is determined whether or not the recognized characters of all digits have been determined (ST61), and by confirming that the recognized characters of all digits have been determined, as shown in FIG. A recognized character string 23R is determined (ST62).

In this way, the recognition character string of the lot number, which is the component information of all the components recognized in the component information recognition process described above, is sent to the host system 3 as a server together with the board information 36b of the board 7 on which the component is mounted. It is output by the data output unit 35b (data output step). Then, in the host system 3, it is stored in the trace database 3a as trace data, which is production history information by the component mounting apparatuses M5 and M6.

The trace data stored in the trace database 3a will be described with reference to FIG. The trace data 50 indicates the production history of the mounting board to be manufactured, and is created for each component mounting line or each component mounting apparatus. As shown in FIG. 11(a), the trace data 50 associates a board ID 51 that identifies each manufactured board with a date of manufacture 52, a product serial number 53, a part name 54, a lot number 55, and the like. It has a data structure.

The date of manufacture 52 identifies the date on which the board was manufactured. A product serial number 53 is a unique number assigned to the board. The part name 54 indicates the name of the part mounted on the board, and corresponds to the part number when the part is mounted. The lot number 55 is component information specifying individual components, and is output from the component mounting apparatuses M5 and M6 in the component mounting system 1 shown in this embodiment.

The trace data 50 is utilized as follows in retroactive tracing of the cause and effects of product defects. When a problem occurs in an electronic device that has been shipped to the market, the relevant departments such as the manufacturer of the product first investigate the actual state of the problem and the cause of the problem. As a result, first, the causative part that caused the defect is specified, and then the lot number corresponding to the causative part is specified.

When the causative part is identified in this way, a search for grasping the spread and influence of the defect in the market is executed by the search function provided in the host system 3. Enter name 56a and lot number 56b. This search yields a search result output 57 shown in FIG. 11(c). In the search result output 57, search data 50* in which the board ID 51, the manufacturing date 52, and the product serial number 53 are linked is obtained. With this search data 50*, the parties concerned in the related departments can grasp the actual state of the problem in the market on an individual product basis, and can formulate effective countermeasures against the problem.

As described above, the component mounting system 1 according to the present embodiment includes the component mounting apparatuses M5 and M6 and the host system 3 as a server. A lot number recognizing unit 35a for recognizing the lot number by imaging the characters of the lot number as the printed component information, and board information of the board 7 on which the component is mounted based on the lot number recognized by the lot number recognizing unit 35a. 36b and a data output unit 35b for outputting to the host system 3 as trace data. As a result, production history data can be acquired without manually reading identification information such as barcodes.

Further, the component mounting apparatuses M5 and M6 shown in the present embodiment have a storage unit 32 for storing component part number character type information 37b that defines the type of character type for each digit of the regular part number, and a part number recognizing unit 34a for recognizing the part number by imaging the characters of the part number obtained and recognizing the imaged character image for each digit based on the character type information stored in the storage unit 32; A genuine part determination section 34b that determines whether the part number recognized by the part number recognition section 34a matches the regular part number, and the regular part determination section 34b determines that the part number matches the regular part number. In this case, mounting heads 15A and 15B for mounting the component 20 on the substrate 7 are provided.

As a result, even if there is a confusing combination of numbers and alphabets that are similar in shape when the characters to be recognized are written as graphics, the part number can be accurately recognized to prevent erroneous mounting. can be done.

In the above-described embodiment, the component mounting apparatuses M5 and M6 are configured to image and recognize the character of the lot number and the character of the component part number. The condition inspection device M7 may be configured to have a similar function. Even in this case, it is possible to accurately recognize the part number and prevent the output of an erroneous inspection result.

The component mounting apparatus and trace data acquisition method of the present invention have the effect of being able to acquire production history data without manually reading identification information such as barcodes. It is useful in the field of manufacturing substrates.

REFERENCE SIGNS LIST 1 component mounting system 7 board 15A, 15B mounting head 17 board recognition camera 20 component 22 component part number character string 23 lot number character string M5, M6 component mounting apparatus

Claims (13)

a component information recognition unit that captures characters of component information printed on the surface of the component before being mounted on the substrate and recognizes the component information;
a data output unit that outputs the component information recognized by the component information recognition unit to a database;
The component mounting apparatus, wherein the data output unit associates the recognized component information with board information of a board on which the component is mounted, and outputs the information to the database. 2. The component mounting apparatus according to claim 1, wherein said recognized component information is a character string. 3. The component mounting apparatus according to claim 1, further comprising a determination unit that determines whether or not the component information recognized by said component information recognition unit matches a regular component part number. 4. The component mounting apparatus according to claim 3, wherein said data output unit outputs image information indicating prohibition of use of a component determined not to match said regular component part number. Furthermore, a control unit for controlling component mounting of the component is provided,
4. The component mounting apparatus according to claim 3, wherein said control unit stops mounting of a component determined not to match said regular component part number. further comprising a storage unit for storing character type information defining character type classification for each digit of the component information,
6. The component mounting apparatus according to claim 1, wherein said component information recognition section recognizes said component information based on said character type information stored in said storage section. 7. The component mounting apparatus according to claim 6, wherein said character type information stored in said storage unit is input by a user. The component information recognition unit sequentially extracts a plurality of candidates from the imaged character image for each digit in recognition processing according to a priority given in advance,
8. The component mounting apparatus according to claim 6, wherein when the first candidate with the highest priority matches the character type of the corresponding digit stored in said storage unit, said first candidate is adopted. . The parts information recognizing unit detects that the first candidate with the highest priority does not match the character type of the corresponding digit stored in the storage unit, and the second candidate with the next highest priority after the first candidate. 9. The component mounting apparatus according to claim 8, wherein the second candidate is adopted when the candidate of matches the character type of the corresponding digit stored in the storage unit. 10. The component mounting apparatus according to claim 6, wherein said character type includes at least numbers and alphabets. 11. The component mounting apparatus according to claim 1, wherein said component information is a lot number. 12. The component mounting apparatus according to any one of claims 1 to 11, wherein said data output unit outputs information on manufacturing date together with said component information and said board information. A trace data acquisition method for acquiring production history data in a component mounting system including a component mounting apparatus, comprising:
a component information recognition step of capturing an image of characters of component information applied to the surface of the component before being mounted on the substrate, and recognizing the component information;
a data output step of outputting the component information recognized in the component information recognition step to a database;
The trace data acquisition method, wherein the database associates and stores the component information and the board information of the board on which the component is mounted.

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