JP2017188370A - Assembly quality discrimination device, assembly quality discrimination method and assembly quality discrimination program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately discriminate whether a first article and a second article are normally assembled.SOLUTION: An assembly quality discrimination device comprises: a timing information acquisition part which acquires timing information indicating assembly timing of a first article and a second article; a physical quantity information acquisition part for acquiring physical quantity information to be generated when assembling the first article and the second article based on the timing information; a discrimination result information acquisition part for acquiring discrimination result information to be obtained by discriminating whether assembly is normally performed without using the physical quantity information acquired by the physical quantity information acquisition part, the discrimination result information indicating whether the assembly is normally performed; a physical quantity information classification part for classifying the physical quantity information based on the discrimination result information; a discrimination condition setting part which sets a discrimination condition for discriminating whether the assembly is normally performed using the physical quantity information based on the classified physical quantity information; and a discrimination part for discriminating whether the assembly is normally performed in accordance with whether the physical quantity information meets the discrimination condition.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an assembly pass / fail judgment device, an assembly pass / fail judgment method, and an assembly pass / fail judgment program, and in particular, an assembly pass / fail judgment that determines whether or not assembly has been performed normally based on physical quantity information generated when assembling a plurality of articles. The present invention relates to a determination device, an assembly quality determination method, and an assembly quality determination program.

  2. Description of the Related Art Conventionally, a system for determining a fitting state of an article such as a connector by sound in an automobile factory or a parts factory has been proposed (for example, see Patent Document 1). In this system, whether or not the operator can fit the connector and the member to be fitted is determined based on the locking sound generated from the lock mechanism provided in the connector when the connector and the member to be fitted are fitted. Judgment.

  In the system described in Patent Document 1, a reference value used as a comparison reference for rock sound is determined by obtaining an average value or the like of sound detection values.

JP 2004-273195 A

  However, in the reference sound signal determination method described in Patent Document 1, the reference value is obtained from the detected value of the lock sound. That is, the reference value is obtained without considering the detection value of the sound other than the lock sound. For this reason, there is a possibility that the reference value described in Patent Document 1 is not a reference value suitable for distinguishing between a lock sound and a non-lock sound. Therefore, it cannot be accurately determined whether or not the first article and the second article are assembled normally.

  The present invention has been made in view of such circumstances, and an assembly pass / fail determination apparatus and assembly pass / fail that can accurately determine whether or not the assembly of the first article and the second article has been performed normally. An object is to provide a determination method and an assembly quality determination program.

  To achieve the above object, an assembly quality determination device according to an embodiment of the present invention includes a timing information acquisition unit that acquires timing information indicating an assembly timing of a first article and a second article, and the timing information acquisition. A physical quantity information acquisition unit that acquires physical quantity information generated when the first article and the second article are assembled based on the timing information acquired by the unit; and the assembly of the first article and the second article. The determination result information indicating whether or not the assembly is normally performed, and the determination is obtained by determining whether or not the assembly is performed normally without using the physical quantity information acquired by the physical quantity information acquisition unit. Based on the determination result information acquisition unit that acquires the result information and the determination result information acquired by the determination result information acquisition unit, before the physical quantity information acquisition unit acquires A physical quantity information classification unit for classifying physical quantity information, and a determination for determining that the first article and the second article have been normally assembled using the physical quantity information acquired by the physical quantity information acquisition unit. The determination condition setting unit that sets a condition based on the physical quantity information classified by the physical quantity information classification unit, and the physical condition information acquired by the physical quantity information acquisition unit is the determination condition set by the determination condition setting unit. A determination unit that determines whether or not the assembly of the first article and the second article is normally performed according to whether or not the condition is satisfied.

  The assembly quality determination method according to another embodiment of the present invention includes a step of acquiring timing information indicating an assembly timing of the first article and the second article, and the first based on the acquired timing information. Obtaining physical quantity information generated when assembling an article and the second article, and determination result information indicating whether or not the assembly of the first article and the second article has been performed normally. Acquired based on the acquired determination result information, the step of acquiring the determination result information obtained by determining whether or not the assembly has been normally performed without using the physical quantity information that has been performed Classifying the physical quantity information and determining that the assembly of the first article and the second article has been normally performed using the acquired physical quantity information. Setting the determination condition based on the classified physical quantity information, and whether the acquired physical quantity information satisfies the set determination condition, the first article and the second article And determining whether or not the assembly is normally performed.

  The assembly quality determination program according to another embodiment of the present invention includes a timing information acquisition unit that acquires timing information indicating an assembly timing of the first article and the second article, and the timing acquired by the timing information acquisition unit. Based on the information, a physical quantity information acquisition unit that acquires physical quantity information generated when assembling the first article and the second article, and whether or not the first article and the second article have been normally assembled The determination result information indicating whether or not the physical quantity information acquisition unit acquires the determination result information obtained by determining whether or not the assembly is normally performed without using the physical quantity information acquired by the physical quantity information acquisition unit. Based on the result information acquisition unit and the determination result information acquired by the determination result information acquisition unit, the physical quantity information acquired by the physical quantity information acquisition unit is separated. A determination condition for determining that the assembly of the first article and the second article has been normally performed using the physical quantity information acquired by the physical quantity information classification unit and the physical quantity information acquisition unit, A determination condition setting unit set based on the physical quantity information classified by the physical quantity information classification unit, and whether the physical quantity information acquired by the physical quantity information acquisition unit satisfies the determination condition set by the determination condition setting unit Accordingly, the computer is caused to function as a determination unit that determines whether or not the first article and the second article have been normally assembled.

  The present invention can also be realized as a semiconductor integrated circuit that realizes part or all of the assembly pass / fail judgment, or as a system including an assembly pass / fail judgment device.

  According to the present invention, it is possible to accurately determine whether or not the first article and the second article have been normally assembled.

It is a figure which shows the structure of the production system which concerns on embodiment of this invention. It is a figure which shows the flow of an assembly of a connector and a cable. It is the figure which showed typically the cross section of the AA line of FIG. It is a block diagram which shows the functional structure of the assembly quality determination apparatus which concerns on embodiment of this invention. It is a figure which shows an example of the classification result information memorize | stored in the classification result information storage part. It is a figure which shows an example of the judgment condition information memorize | stored in the judgment condition information storage part. It is a figure which shows an example of the determination result information memorize | stored in a determination result information storage part. It is a flowchart which shows the flow of the process of the learning mode which the assembly quality determination apparatus which concerns on embodiment of this invention performs. It is a flowchart which shows the flow of the process of the operation mode which the assembly quality determination apparatus which concerns on embodiment of this invention performs.

First, embodiments of the present invention will be listed and described.
(1) The assembly quality determination device according to an embodiment of the present invention includes a timing information acquisition unit that acquires timing information indicating an assembly timing of the first article and the second article, and the timing information acquisition unit that acquires the timing information. Based on the timing information, a physical quantity information acquisition unit that acquires physical quantity information generated when assembling the first article and the second article, and whether the first article and the second article have been normally assembled. It is determination result information indicating whether or not the determination result information obtained by determining whether or not the assembly is normally performed without using the physical quantity information acquired by the physical quantity information acquisition unit. The physical quantity information acquired by the physical quantity information acquisition unit is classified based on the determination result information acquisition unit and the determination result information acquired by the determination result information acquisition unit. A physical condition information classification unit and a determination condition for determining that the assembly of the first article and the second article has been normally performed using the physical quantity information acquired by the physical quantity information acquisition unit, and the physical quantity A determination condition setting unit that is set based on the physical quantity information classified by the information classification unit, and whether the physical quantity information acquired by the physical quantity information acquisition unit satisfies the determination condition set by the determination condition setting unit And a determination unit that determines whether or not the first article and the second article have been normally assembled.

  According to this configuration, the physical quantity information acquired by the physical quantity information acquisition unit is classified based on the determination result of the assembly of the first article and the second article acquired by the determination result information acquisition unit. In addition, determination conditions are set based on the classified physical quantity information. That is, the determination condition is set based on both the physical quantity information when the assembly is performed normally and the physical quantity information when the assembly is not performed normally. For this reason, the set determination condition is a determination condition that can appropriately determine whether or not the assembly has been performed normally (hereinafter referred to as “good or bad assembly” as appropriate). Therefore, the determination unit accurately determines whether or not the assembly of the first article and the second article is performed normally by determining whether or not the assembly is performed normally using the set determination condition. Can be determined.

  (2) The determination condition setting unit may set the determination condition when the first predetermined condition is satisfied.

  According to this configuration, for example, the determination condition is set when a predetermined number of determination results are acquired. For this reason, the determination condition can be set when a determination result or physical quantity information sufficient to set the determination condition is obtained. For this reason, it is possible to set a determination condition with high determination accuracy as to whether or not the assembly has been normally performed. In addition, when the determination condition is not set, the determination result acquired by the determination result information acquisition unit may be the determination result as to whether or not the assembly has been performed normally.

  (3) The determination condition setting unit may reset the determination condition when the second predetermined condition is satisfied.

  According to this configuration, for example, when the ratio at which it is determined that the assembly is not normally performed increases due to deterioration of the performance of the sensor that senses the physical quantity, the determination condition can be reset. it can. Thereby, the success or failure of assembly can always be accurately determined.

  (4) The determination condition setting unit may notify the predetermined information to the outside when the second predetermined condition is satisfied.

  According to this configuration, for example, when the rate at which it is determined that the assembly has not been performed normally has increased due to a problem such as rattling of the assembly device that assembles the first article and the second article, the ratio The operator can be notified of the increase in the number of voices by voice, video or electronic mail. Thereby, the operator can cope with such a malfunction appropriately.

  (5) Further, the second predetermined condition may be a condition relating to a comparison between an abnormality occurrence rate of the assembly based on a determination result by the determination unit and a reference value.

  According to this configuration, when the assembly error rate exceeds the reference value, the judgment condition is reset, the operator is notified that the error rate has exceeded the reference value, The operator can be notified of the cause investigation order.

  (6) Further, the reference value may be a value based on the assembly abnormality occurrence rate determined based on the determination result information acquired by the determination result information acquisition unit.

  According to this configuration, the abnormality occurrence rate calculated based on the determination result information can be used as the reference value. Alternatively, a value obtained by adding a certain value to the abnormality occurrence rate may be used as the reference value. For this reason, when the error rate has increased compared to when the judgment result is set, the judgment condition is reset, the operator is notified that the error rate has exceeded the reference value, or an error has occurred. An operator can be notified of an investigation order for the cause of the problem. In addition, the reference value can be appropriately set by a simple method.

  (7) The first article may be a connector, and the second article may be a cable having a cable terminal.

  According to this configuration, the quality of the assembly can be determined based on the physical quantity information generated when the connector and the cable are assembled.

  (8) The determination result information acquisition unit may acquire the determination result information obtained by a tensile test of the cable or the determination result information obtained by a continuity test of the cable.

  By performing a tensile test or a continuity test of the cable, it is possible to appropriately determine whether or not the connector and the cable are assembled. For this reason, the physical quantity information acquired by the physical quantity information acquisition unit can be accurately classified. By using the physical quantity information classified in this way, it is possible to set a determination condition that can appropriately determine the quality of assembly. For this reason, based on the physical quantity information acquired by the physical quantity information acquisition unit, it is possible to perform an assembly quality determination process having the same performance as the tensile test or the continuity test.

  (9) An assembly quality determination method according to another embodiment of the present invention includes a characteristic processing unit included in the above-described assembly quality determination device as a step. For this reason, there can exist an effect | action and effect similar to the above-mentioned assembly quality determination apparatus.

  (10) An assembly quality determination program according to another embodiment of the present invention is a program for causing a computer to function as the assembly quality determination device described above. For this reason, there can exist an effect | action and effect similar to the above-mentioned assembly quality determination apparatus.

[Details of the embodiment of the present invention]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Each of the embodiments described below shows a preferred specific example of the present invention. The numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of the constituent elements, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. The invention is specified by the claims. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept of the present invention are not necessarily required to achieve the object of the present invention. It will be described as constituting a preferred form.

[1. Overall system configuration]
FIG. 1 is a diagram showing a configuration of a production system according to an embodiment of the present invention.
In the production system 1, for example, a product such as a wire harness is produced, and an assembly process of inserting the cable 70 (the cable terminal 71 thereof) into the connector 60 is included as a part of the production process.

  The production system 1 includes a belt conveyor 40, a robot 30, a tensile test device 80, a microphone 25, an assembly quality determination device 10, and a PLC 50.

  The belt conveyor 40 is a device that constitutes a product production line and conveys a work in progress (here, the connector 60) of the product.

  The robot 30 grips the cable 70 with the grip portion 31 and inserts the cable terminal 71 at the distal end of the cable 70 into the connector 60, thereby fitting the cable terminal 71 and the connector 60 into the cable 70 (cable terminal). 71) and the connector 60 are assembled. The assembled connector 60 is carried to the next process by the belt conveyor 40.

  The tensile test apparatus 80 determines whether or not the assembly of the connector 60 and the cable 70 has been normally performed by pulling the cable 70 from the connector 60 after the assembly process of the connector 60 and the cable 70 by the robot 30. This is a device for testing. That is, the tensile test apparatus 80 pulls the cable 70 after being inserted into the connector 60 so as to be pulled away from the connector 60 at a constant torque for a predetermined time. If the cable 70 does not move more than a predetermined distance due to the pulling, the tensile testing device 80 determines that the assembly of the connector 60 and the cable 70 has been performed normally. When the cable 70 moves more than a predetermined distance, the tensile test apparatus 80 determines that the assembly of the connector 60 and the cable 70 is not normally performed. The tensile test apparatus 80 transmits the determination result to the PLC 50.

  The microphone 25 is disposed in the vicinity of the connector 60 in the step of inserting the cable 70 into the connector 60, and collects sound information when the cable terminal 71 and the connector 60 are fitted.

  The assembly pass / fail determination device 10 is a device that determines whether or not the assembly of the cable 70 and the connector 60 has been normally performed based on sound information collected by the microphone 25. It is composed of a portable information terminal. In addition, the assembly quality determination apparatus 10 may be configured by a computer such as a server, a notebook personal computer, or a desktop personal computer.

  Further, the assembly quality determination device 10 determines a determination condition for determining assembly quality using sound information based on the sound information collected by the microphone 25 and the determination result by the tensile test device 80.

  The PLC 50 is connected to the robot 30, the belt conveyor 40, and the assembly quality determination device 10, and controls the operations of the robot 30 and the belt conveyor 40. In addition, the PLC 50 transmits timing information indicating the assembly timing of the connector 60 and the cable 70 to the assembly quality determination device 10. Further, the PLC 50 receives the assembly quality determination result of the cable 70 and the connector 60 from the assembly quality determination device 10 and displays the result on a display device such as a programmable display. As a result, the operator can check the cable 70 and the connector 60 that have not been assembled afterwards and perform correction processing such as reinserting the cable 70. Further, the PLC 50 receives the assembly quality determination result from the tensile test device 80 and transmits the received quality determination result to the assembly quality determination device 10.

[2. Assembly of connector 60 and cable 70]
FIG. 2 is a view showing a flow of assembly of the connector 60 and the cable 70. FIG. 3 is a diagram schematically showing a cross section taken along line AA of FIG. In FIG. 3, detailed portions of the cross section are omitted, and only main portions of the present embodiment are described. 2A to 2C correspond to FIGS. 3A to 3C, respectively.

  As shown in FIG. 2A, a cable terminal 71 is provided at the tip of the cable 70, and a hole 72 is provided in the cable terminal 71. The connector 60 is provided with n holes P1, P2,..., Pn into which the cable terminals 71 are inserted. Here, it is assumed that the cable terminal 71 is inserted into the hole Pn. As shown in FIG. 3A, a claw portion 61 extending in the direction in which the cable terminal 71 is inserted is provided in the upper portion of the hole portion Pn of the connector 60. The claw portion 61 is made of a material (for example, a resin material) that can be deformed toward the upper side of the connector 60, and engages with the hole portion 72 of the cable terminal 71 when the cable terminal 71 is inserted into the connector 60. Provided in position.

  As shown in FIG. 2B, when the cable terminal 71 is inserted halfway through the hole Pn, the claw 61 is pushed and bent by the cable terminal 71 as shown in FIG. .

  Further, when the cable terminal 71 is inserted into the hole Pn as shown in FIG. 2C, the claw portion 61 of the connector 60 is returned to the original state by the elastic force as shown in FIG. The cable terminal 71 is housed in the hole 72. Thereby, the claw part 61 of the connector 60 and the cable terminal 71 are fitted. At this time, when the deformed claw portion 61 vigorously returns to the original state, an impact sound (lock sound) of “click” is generated. Even if the cable terminal 71 is pulled in the direction opposite to the insertion direction after the fitting, the claw 61 contacts the wall surface of the hole 72 of the cable terminal 71, so that the cable 70 does not come out of the connector 60.

  As described above, the claw portion 61 and the hole portion 72 constitute a lock mechanism, and the claw portion 61 is fitted into the hole portion 72 so that the lock mechanism is activated. Thereby, even if the tensile test apparatus 80 performs a tensile test, the cable 70 does not move more than a predetermined distance, so that it is determined that the assembly of the cable 70 and the tensile test apparatus 80 has been normally performed.

[3. Configuration of assembly quality determination apparatus 10]
FIG. 4 is a block diagram showing a functional configuration of the assembly quality determination device 10 according to the embodiment of the present invention.

  The assembly quality determination device 10 is constituted by a portable information terminal or the like as described above. The portable information terminal has a general computer configuration such as a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and a communication interface.

  The assembly quality determination device 10 includes an A / D (Analog / Digital) converter 11, a communication I / F (interface) unit 12, a timing information acquisition unit 13, a physical quantity information acquisition unit 14, and a type information acquisition unit 15. A determination result information acquisition unit 16, a physical quantity information classification unit 17, a classification result information storage unit 18, a determination condition setting unit 19, a determination condition information storage unit 20, a determination unit 21, and a determination result information storage unit. 22 and a determination result information output unit 23.

  The processing units 13 to 17, 19, 21, and 23 achieve their functions by executing computer programs stored in a RAM or the like on the CPU.

  The A / D converter 11 is connected to the microphone 25 and converts an analog sound signal collected by the microphone 25 into a digital sound signal (sound information).

  The communication I / F unit 12 is a communication interface that exchanges various information with the PLC 50.

  The timing information acquisition unit 13 receives timing information indicating the assembly timing of the connector 60 and the cable 70 from the PLC 50 via the communication I / F unit 12. The insertion of the cable 70 into the connector 60 is performed by a series of operations shown as an example below. That is, the grip portion 31 of the robot 30 grips the cable 70 and the grip portion 31 moves to the position of the hole Pi (i = 1 to n) of the connector 60. Next, the grip portion 31 inserts the cable terminal 71 into the hole Pi of the connector 60, and the grip portion 31 finishes gripping the cable 70 and moves to the position of the cable 70 to be inserted next. Of such a series of operations, timing information may be time information from when the grip portion 31 starts to insert the cable terminal 71 into the hole Pi of the connector 60 until the insertion is completed. For example, the timing information acquisition unit 13 acquires information on the insertion start time and insertion end time of the cable terminal 71 into the hole Pi as timing information.

  The physical quantity information acquisition unit 14 acquires sound information from the A / D converter 11 based on the timing information acquired by the timing information acquisition unit 13. That is, the physical quantity information acquisition unit 14 acquires sound information from the A / D converter 11 from the insertion start time to the insertion end time of the cable terminal 71 indicated by the timing information. Thereby, the physical quantity information acquisition unit 14 can acquire sound information when the cable terminal 71 and the connector 60 are fitted.

  The type information acquisition unit 15 acquires the type information of the connector 60 and the cable 70 to be assembled from the PLC 50 via the communication I / F unit 12. In other words, the type information acquisition unit 15 acquires information on the type of the connector 60, the hole number (pin number) of the connector 60, and the type of the cable 70 (type of the cable terminal 71) from the PLC 50. For example, the type information acquisition unit 15 acquires information such as the type “A” of the connector 60, the pin number “P1” of the connector 60, and the type “X” of the cable terminal 71.

  The determination result information acquisition unit 16 acquires determination result information obtained by determining whether or not the assembly of the connector 60 and the cable 70 has been normally performed. This determination is made without using the sound information acquired by the physical quantity information acquisition unit 14. That is, the determination result information acquisition unit 16 acquires determination result information on whether the connector 60 and the cable 70 are assembled or not from the tensile test apparatus 80 via the PLC 50.

  The physical quantity information classification unit 17 classifies the sound information acquired by the physical quantity information acquisition unit 14 based on the determination result information acquired by the determination result information acquisition unit 16. That is, the physical quantity information classification unit 17 classifies the sound information acquired by the physical quantity information acquisition unit 14 into sound information when the assembly is performed normally and sound information when the assembly is not performed normally. . The physical quantity information classification unit 17 classifies the sound information for each type information acquired by the type information acquisition unit 15. The physical quantity information classification unit 17 writes the classification result information of the sound information in the classification result information storage unit 18.

  The classification result information storage unit 18 is a storage device for storing the classification result information of the sound information, and includes, for example, a nonvolatile memory such as a flash memory, or a RAM.

  FIG. 5 is a diagram illustrating an example of the classification result information stored in the classification result information storage unit 18. For each type information (connector type, pin number, terminal), the classification result information storage unit 18 uses the sound acquired by the physical quantity information acquisition unit 14 based on the assembly quality determination result information acquired by the determination result information acquisition unit 16. Classification result information obtained by classifying information is stored. For example, the sound information when the cable 70 having the cable terminal 71 of the terminal type “X” is inserted into the hole 72 of the pin number “P1” of the connector 60 of the connector type “A” is determined for each assembly quality determination result. It is classified and memorized. Note that the determination result “normal” indicates that the assembly has been performed normally, and the determination result “abnormal” indicates that the assembly has not been performed normally. Similarly, for other type information (for example, connector type “B”, pin number “P1”, and terminal type “Z”), the sound information when the cable 70 having the cable terminal 71 is inserted indicates whether the assembly is good or bad. It is classified and stored for each judgment result.

  Referring to FIG. 4 again, the determination condition setting unit 19 uses the sound information acquired by the physical quantity information acquisition unit 14 to determine that the connector 60 and the cable 70 have been normally assembled. Is set based on the sound information classified by the physical quantity information classification unit 17. Thereby, the determination condition which shows the sound information when the cable terminal 71 and the connector 60 are fitted can be set. The determination condition setting unit 19 sets a determination condition for each type information.

  Specifically, the determination condition setting unit 19 refers to the classification result information stored in the classification result information storage unit 18 and extracts a feature amount from each sound information. For example, the amplitude value of sound information and the frequency of sound information are extracted as feature amounts. The determination condition setting unit 19 calculates a certainty factor indicating the degree of separation between the amplitude value of the sound information corresponding to the determination result “normal” and the amplitude value of the sound information corresponding to the determination result “abnormal”. Further, the determination condition setting unit 19 calculates a certainty factor indicating a degree of separation between the frequency of the sound information corresponding to the determination result “normal” and the frequency of the sound information corresponding to the determination result “abnormal”.

The certainty factor can be calculated by a known method. That is, the feature amount of sound information corresponding to the determination result “normal” belongs to class 0, and the feature amount of sound information corresponding to the determination result “abnormal” belongs to class 1. At this time, the determination condition setting unit 19 calculates a certainty factor represented by the following Expression 1 for each of the amplitude value and the frequency of the sound information.
Confidence = class variance σ _B ² / class variance σ _w ² (Equation 1)
Intraclass variance σ _w ² = ω ₀ σ ₀ ² + ω ₁ σ ₁ ² (Formula 2)
Interclass variance σ _B ² = ω ₀ (μ ₀ −μ _T ) ² + ω ₁ (μ ₁ −μ _T ) ² (Equation 3)
Here, ω _i (i = 0, 1) indicates the ratio of the feature quantity belonging to class i to the total feature quantity. Also, σ _i ² (i = 0, 1) indicates the variance of the feature quantity belonging to class i. Further, μ _i (i = 0, 1) represents an average of feature quantities belonging to class i. Further, mu _T represents the average of all feature quantities.

The determination condition setting unit 19 uses the feature value of the calculated certainty factor of the amplitude value and frequency of the sound information and uses the feature value of the sound information corresponding to the determination result “normal” and the determination result “ A threshold value for separating the feature amount of the sound information corresponding to “abnormal” is determined. For example, the determination condition setting unit 19 may determine the midpoint value of μ ₀ and μ ₁ as the threshold value. The determination condition setting unit 19 may determine the threshold value using a neural network, a support vector machine, a decision tree, or the like.

  The determination condition setting unit 19 writes a determination condition indicating that the assembly has been normally performed based on the determined threshold in the determination condition information storage unit 20 for each type information. Thereby, a determination condition is set in the determination condition information storage unit 20. For example, when the determination condition setting unit 19 determines that the frequency threshold is Th, and the frequency equal to or higher than the threshold Th corresponds to the feature amount of the sound information corresponding to the determination result “normal”, the determination condition setting unit 19 Sets the determination condition “frequency Th or higher” in the determination condition information storage unit 20. Needless to say, the feature quantity extracted by the determination condition setting unit 19 is not limited to the amplitude value and the frequency, and may be another feature quantity.

  The determination condition setting unit 19 may set the determination condition when the following first predetermined condition is satisfied. The first predetermined condition may be, for example, that a predetermined number (for example, 3000) of sound information is stored, or the certainty factor shown in Equation 1 is equal to or greater than a predetermined certainty factor threshold value. There may be. Accordingly, the determination condition can be set when a determination result or sound information sufficient to set the determination condition is obtained.

  While the first predetermined condition is not satisfied, the determination result by the tensile test apparatus 80 is the assembly quality determination result of the connector 60 and the cable 70, and the classification result information in the meantime is accumulated in the classification result information storage unit 18. . A mode in which the tensile test apparatus 80 is operated and the classification result information is accumulated in the classification result information storage unit 18 is referred to as a “learning mode”. When the determination condition is set by the determination condition setting unit 19, the “learning mode” is changed to the “operation mode”. The “operation mode” will be described later.

  The feature amount used for determining the threshold value may be either a frequency or an amplitude value, but it is preferable to determine the threshold value based on the feature amount having the higher certainty factor as described above. This is because the characteristic amount of the sound information corresponding to the determination result “normal” and the characteristic amount of the sound information corresponding to the determination result “abnormal” are easily separated, and the determination performance by the determination unit 21 described later is improved. Because.

  The determination condition information storage unit 20 is a storage device for storing the determination conditions determined by the determination condition setting unit 19 for each type information, and is configured by, for example, a nonvolatile memory such as a flash memory, or a RAM. .

  FIG. 6 is a diagram illustrating an example of determination condition information stored in the determination condition information storage unit 20. The determination condition information illustrated in FIG. 6 indicates determination conditions according to the type of the connector 60, the type of the cable terminal 71, and the pin number of the connector 60. For example, the determination condition corresponding to the type “A” of the connector 60, the type “X” of the cable terminal 71, and the pin number “P1” of the connector 60 is “more than the amplitude value Ax”. This is because, when the type “X” cable terminal 71 is inserted into the hole of the pin number “P1” of the type “A” connector 60, the amplitude value extracted from the sound information is greater than or equal to Ax. This shows that it can be determined that the assembly of the connector 60 and the cable 70 has been performed normally.

  Referring to FIG. 4 again, in the operation mode, the tensile test apparatus 80 stops and the determination process by the determination unit 21 is executed. That is, the determination unit 21 reads the determination condition corresponding to the type information from the determination condition information storage unit 20 based on the type information of the connector 60 and the cable 70 acquired by the type information acquisition unit 15. Thereby, the determination condition is acquired. For example, it is assumed that the type information acquisition unit 15 acquires the type “B” of the connector 60, the type “Y” of the cable terminal 71, and the pin number “Pn” of the connector 60 as type information. In this case, the determination unit 21 reads the determination condition “frequency Ky or higher” from the determination condition information illustrated in FIG. 6.

  The determination unit 21 determines whether or not the assembly of the connector 60 and the cable 70 has been normally performed according to whether or not the sound information acquired by the physical quantity information acquisition unit 14 satisfies the read determination condition. Specifically, the determination unit 21 extracts a feature amount from the sound information. As the feature quantity, for example, the amplitude value of the sound information may be extracted, or the frequency of the sound information may be extracted. The determination unit 21 determines whether or not the extracted feature amount satisfies the read determination condition. If the determination condition is satisfied, the determination unit 21 determines that the assembly is performed normally and does not satisfy the determination condition. Determines that the above assembly has not been performed normally. For example, the determination unit 21 determines that the assembly is normally performed when the frequency of the sound information is equal to or higher than the frequency threshold, and the assembly is normally performed when the frequency is less than the frequency threshold. Judge that there was no. The determination unit 21 writes determination result information indicating a determination result in the determination result information storage unit 22 every time such assembly quality is determined. The determination unit 21 writes, together with the determination result information, information on the type of the connector 60 acquired by the type information acquisition unit 15, the pin number of the connector 60, and the type of the cable terminal 71 of the cable 70 in the determination result information storage unit 22. Needless to say, the feature quantity extracted by the determination unit 21 is not limited to the amplitude value and the frequency, but may be another feature quantity.

  The determination result information storage unit 22 is a storage device for storing determination result information indicating a determination result, and includes, for example, a nonvolatile memory such as a flash memory, or a RAM.

  FIG. 7 is a diagram illustrating an example of determination result information stored in the determination result information storage unit 22. The determination result information indicates the connector type, pin number, terminal type, and determination result. For example, when the cable 70 having the cable terminal 71 of the terminal type “X” is inserted into the hole of the pin number “P1” of the connector 60 of the connector type “A”, the assembly of the connector 60 and the cable 70 is normal. It has been shown that it was done. Further, when the cable 70 having the cable terminal 71 of the terminal type “Y” is inserted into the hole of the pin number “P2” of the connector 60 of the connector type “A”, the assembly of the connector 60 and the cable 70 is normal. Indicates that it was not performed (abnormal).

  Referring to FIG. 4 again, the determination result information output unit 23 reads the determination result information from the determination result information storage unit 22 and transmits the read determination result information to the PLC 50 via the communication I / F unit 12. Note that the determination result information output unit 23 may transmit the determination result information to the PLC 50 when a predetermined number of determination results are collected. Further, the determination result information output unit 23 may transmit the determination result information to the PLC 50 at regular time intervals.

[4. Processing flow of assembly pass / fail judgment device 10]
8A and 8B are flowcharts showing a flow of processing executed by the assembly quality determination device 10 according to the embodiment of the present invention. FIG. 8A shows a flow of processing executed by the assembly quality determination device 10 in the learning mode, and FIG. 8B shows a flow of processing executed by the assembly quality determination device 10 in the operation mode.

  Referring to FIG. 8A, type information acquisition unit 15 acquires type information of connector 60 and cable 70 to be assembled from PLC 50 via communication I / F unit 12 (S1). That is, the type information acquisition unit 15 acquires information on the type of the connector 60, the hole number (pin number) of the connector 60, and the type of the cable terminal 71 from the PLC 50. For example, the type information acquisition unit 15 acquires information such as the type “A” of the connector 60, the pin number “P1” of the connector 60, and the type “X” of the cable terminal 71.

  The timing information acquisition unit 13 receives timing information indicating the assembly timing of the connector 60 and the cable 70 from the PLC 50 via the communication I / F unit 12 (S2). For example, the timing information acquisition unit 13 acquires information on the insertion start time and the insertion end time of the cable terminal 71 into the hole P1 as timing information.

  The physical quantity information acquisition unit 14 acquires sound information from the A / D converter 11 between the insertion start time and the insertion end time indicated by the timing information acquired by the timing information acquisition unit 13 (S3).

  The determination result information acquisition part 16 acquires the determination result information of the assembly quality of the connector 60 and the cable 70 from the tensile test apparatus 80 via PLC50 (S4).

  The physical quantity information classification unit 17 classifies the sound information acquired by the physical quantity information acquisition unit 14 based on the determination result information acquired by the determination result information acquisition unit 16 and writes the classification result information in the classification result information storage unit 18 ( S5). An example of the classification result information is as shown in FIG.

  The determination condition setting unit 19 refers to the classification result information stored in the classification result information storage unit 18 to determine whether or not the first predetermined condition is satisfied (S6). For example, it is determined whether or not the first predetermined condition that 3000 pieces of sound information are stored in the classification result information storage unit 18 is satisfied.

  If the first predetermined condition is not satisfied (NO in S6), the processes in steps S1 to S5 are repeatedly executed until the first predetermined condition is satisfied.

  If the first predetermined condition is satisfied (YES in S6), the determination condition setting unit 19 refers to the classification result information stored in the classification result information storage unit 18 and extracts a feature amount from each sound information. (S7). For example, the amplitude value of the sound information or the frequency of the sound information is extracted as the feature amount.

  The determination condition setting unit 19 calculates a certainty factor for each amplitude value and frequency of the sound information for each type information. Based on the certainty factor, the determination condition setting unit 19 determines the feature amount of the sound information that determines the threshold value from the amplitude value and frequency of the sound information. Also, the determination condition setting unit 19 separates the feature amount of the sound information corresponding to the determination result “normal” and the feature amount of the sound information corresponding to the determination result “abnormal” with respect to the determined feature amount of the sound information. Determine the threshold. The determination condition setting unit 19 writes a determination condition indicating that the assembly has been normally performed based on the determined threshold value in the determination condition information storage unit 20 for each type information (S8). For example, the determination condition setting unit 19 sets “amplitude value Ax or more” as the determination condition corresponding to the type “A” of the connector 60, the type “X” of the cable terminal 71, and the pin number “P1” of the connector 60. And written in the determination condition information storage unit 20. An example of the determination condition information is as shown in FIG. When the determination condition information is set, the assembly quality determination device 10 transitions to the operation mode illustrated in FIG. 8B. At the stage of transition to the operation mode, the operation of the tensile test apparatus 80 is stopped by a command from the PLC 50.

  With reference to FIG. 8B, the type information acquisition unit 15 transmits the type information of the connector 60 and the cable 70 to be assembled from the PLC 50 via the communication I / F unit 12 in the same manner as the type information acquisition process (step S1). Obtain (S9).

  The determination unit 21 acquires a determination condition corresponding to the type information from the determination condition information storage unit 20 based on the type information of the connector 60 and the cable 70 to be assembled acquired by the type information acquisition unit 15 (S10). . For example, when the type information acquisition unit 15 acquires the type “B” of the connector 60, the type “Y” of the cable terminal 71, and the pin number “Pn” of the connector 60 as the type information, the determination is made. The unit 21 acquires the determination condition “frequency Ky or higher” from the determination condition information illustrated in FIG. 6.

  Similar to the timing information acquisition process (step S2), the timing information acquisition unit 13 receives timing information indicating the assembly timing of the connector 60 and the cable 70 from the PLC 50 via the communication I / F unit 12 (S11). .

  Similar to the sound information acquisition process (step S3), the physical quantity information acquisition unit 14 receives from the A / D converter 11 between the insertion start time and the insertion end time indicated by the timing information acquired by the timing information acquisition unit 13. Sound information is acquired (S12).

  The determination unit 21 extracts a feature amount from the sound information acquired in the sound information acquisition process (S12) (S13). The determination condition information storage unit 20 includes an amplitude value condition and a frequency condition. For this reason, here, the amplitude value of the sound information and the frequency of the sound information are extracted as the feature amount.

  The determination unit 21 determines whether or not the feature amount extracted in the feature extraction process (S13) satisfies the determination condition acquired in the determination condition acquisition process (S10) (S14). For example, when the cable terminal 71 of the type “Y” is inserted into the hole of the pin number “Pn” of the connector 60 of the type “B”, the determination unit 21 is extracted by the feature extraction process (S13). It is determined whether the frequency of the sound information satisfies the determination condition “frequency Ky or higher”.

  If the feature amount extracted in the feature extraction process (S13) satisfies the determination condition acquired in the determination condition acquisition process (S10) (YES in S14), the determination unit 21 determines whether the connector 60 and the cable 70 are connected. It is determined that the assembly has been performed normally (S15). If the feature amount extracted in the feature extraction process (S13) does not satisfy the determination condition acquired in the determination condition acquisition process (S10) (NO in S14), the determination unit 21 determines whether the connector 60 and the cable 70 are connected. It is determined that the assembly has not been performed normally (S16). For example, it is assumed that the cable terminal 71 of the type “Y” is inserted into the hole of the pin number “Pn” of the connector 60 of the type “B”. In this case, if the frequency of the sound information is equal to or higher than the frequency Ky, the determination unit 21 determines that the assembly of the connector 60 and the cable 70 has been performed normally. If the frequency of the sound information is less than the frequency Ky, the determination unit 21 determines that the assembly of the connector 60 and the cable 70 has not been performed normally.

  The determination unit 21 writes the determination result in the determination result information storage unit 22 as determination result information together with the information acquired in the type information acquisition process (S9) (S17). An example of the determination result information written in the determination result information storage unit 22 is as shown in FIG.

  The determination result information output unit 23 reads the determination result information from the determination result information storage unit 22, and transmits the read determination result information to the PLC 50 via the communication I / F unit 12 (S18). The determination result information may be transmitted every time a predetermined number (for example, 100) of determination results are written in the determination result information, or may be transmitted every predetermined time (for example, one hour).

  The determination condition setting unit 19 determines whether or not the second predetermined condition is satisfied (S19). The second predetermined condition is a condition indicating that there is a problem in the assembly quality determination by the determination unit 21. The second predetermined condition is that a ratio of determination results that are not correctly assembled with respect to all the determination results of the quality of assembly (hereinafter referred to as “abnormality occurrence rate”) is a predetermined reference value or more. The abnormality occurrence rate should not change much during the operation mode. However, the increase in the abnormality may be caused by, for example, a case where determination errors increase because the performance of the microphone 25 has deteriorated. In such a case, it is necessary to adjust the microphone 25 and reset the determination conditions. Further, when the cable terminal 71 cannot be inserted at the correct position of the hole of the connector 60 due to deterioration of the production equipment such as the robot 30 or the belt conveyor 40, the production equipment needs to be adjusted. According to the second predetermined condition, it is possible to determine whether the setting condition needs to be reset or whether the production facility needs to be adjusted. Note that an abnormality occurrence rate based on a determination result used for setting the determination condition or a value obtained by adding a certain value to the abnormality occurrence rate can be used as the reference value. The method for determining the reference value is not limited to this. For example, a value obtained by multiplying the abnormality occurrence rate by a certain value may be used as the reference value.

  As long as the determination condition setting unit 19 determines that the second predetermined condition is not satisfied (NO in S19), the operation mode processing in steps S9 to S18 is repeatedly executed.

  When the determination condition setting unit 19 determines that the second predetermined condition is satisfied (YES in S19), the determination condition setting unit 19 transmits predetermined information indicating that the second predetermined condition is satisfied to the communication I / Notification is made to the outside via the F unit 12 (S20). For example, the determination condition setting unit 19 notifies the worker by e-mail that the abnormality occurrence rate is equal to or higher than a reference value. The determination condition setting unit 19 outputs a synthesized voice having the above contents from the speaker of the assembly quality determination apparatus 10 or displays an image indicating the above contents on the screen of the assembly quality determination apparatus 10 so that the operator Notification may be made.

  Thereafter, the assembly quality determination device 10 erases the classification result information stored in the classification result information storage unit 18, and then transitions to the learning mode (step S1). Thereby, the determination condition is set again.

[5. Effects of embodiment, etc.]
As described above, according to the embodiment of the present invention, the sound information acquired by the physical quantity information acquisition unit 14 is classified based on the determination result of the tensile test by the tensile test apparatus 80. In addition, determination conditions are set based on the classified physical quantity information. That is, the determination condition is set based on both the physical quantity information when the assembly is performed normally and the physical quantity information when the assembly is not performed normally. For this reason, the set determination condition is a determination condition that can appropriately determine whether or not the assembly is normally performed. Therefore, the determination unit 21 determines whether or not the assembly of the connector 60 and the cable 70 is normally performed by determining whether or not the assembly is normally performed using the set determination condition. Can be determined.

  Further, even after the assembly pass / fail judgment device 10 is shipped, the judgment conditions can be determined or changed.

  In addition, when the second predetermined condition is satisfied, for example, when the abnormality occurrence rate is equal to or higher than the reference value, the determination condition setting unit 19 resets the determination condition or the abnormality occurrence rate is higher than the reference value Is notified to the worker by voice, video or e-mail. Thereby, the success or failure of assembly can always be accurately determined. In addition, the operator can appropriately deal with such problems.

  Further, the abnormality occurrence rate based on the determination result information can be used as a reference value to be compared with the abnormality occurrence rate. Alternatively, a value obtained by adding a certain value to the abnormality occurrence rate can be used as the reference value. For this reason, when the error rate has increased compared to when the judgment result is set, the judgment condition is reset, the operator is notified that the error rate has exceeded the reference value, or an error has occurred. An operator can be notified of an investigation order for the cause of the problem. In addition, the reference value can be appropriately set by a simple method.

  Further, according to the tensile test performed by the tensile test apparatus 80, it is possible to appropriately determine whether or not the connector and the cable are assembled. For this reason, the sound information acquired by the physical quantity information acquisition unit 14 can be accurately classified. By using the sound information classified in this way, it is possible to set a determination condition that can appropriately determine the quality of assembly. For this reason, the assembly quality determination process having the same performance as the tensile test can be performed based on the sound information acquired by the physical quantity information acquisition unit 14.

[6. Addendum]
As described above, the production system 1 according to the embodiment of the present invention has been described focusing on the assembly pass / fail judgment device 10, but the present invention is not limited to this embodiment.

  For example, instead of the tensile test apparatus 80, a continuity test apparatus that performs a continuity test for inspecting whether a current flows between the connector 60 and the cable 70 may be used. After the connector 60 and the cable 70 are assembled and a product such as a wire harness is completed, both ends of the wire harness are connected to a dedicated conduction board. The continuity test apparatus sends an electrical signal having a predetermined waveform to both ends, and confirms whether a prescribed current is flowing. At this time, the continuity test device checks whether the specified current is flowing even when a load such as tapping or twisting is applied to the vicinity of the connector 60, and tests whether the connector 60 and the cable 70 are in a semi-disconnected state. To do. The physical quantity information classification unit 17 classifies the sound information acquired by the physical quantity information acquisition unit 14 based on the result of the continuity test. Similar to the tensile test, the continuity test can appropriately determine whether the connector and the cable are assembled properly.

  Moreover, in the above-mentioned embodiment, it was determined whether the assembly of the connector 60 and the cable 70 was performed normally. However, the determination target is not limited to the connector 60 and the cable 70, and may be a combination of other articles as long as it is a combination of articles assembled to each other. For example, when the assembly is performed by connecting the first connector and the second connector, the assembly pass / fail determination apparatus 10 uses the first connector and the second connector as the determination targets, and determines the first connector and the second connector. It may be determined whether or not the assembling is normally performed.

  Further, in the above-described embodiment, the example in which the claw portion 61 is formed in the connector 60 and the hole portion 72 is formed in the cable terminal 71 of the cable 70 has been described. A claw portion may be formed on the terminal 71. Since the locking sound is also generated when the hole of the connector 60 and the claw of the cable terminal 71 are fitted, the assembly quality determination device 10 determines the hole of the connector 60 and the cable terminal from the sound information at the time of fitting. It can be determined whether the 71 claw portion is fitted. Thereby, the assembly quality determination apparatus 10 can determine whether the assembly of the connector 60 and the cable 70 has been performed normally.

  In the above-described embodiment, the physical quantity information acquisition unit 14 acquires sound information as a physical quantity. However, the physical quantity acquired by the physical quantity information acquisition unit 14 is not limited to sound information. For example, the physical quantity information acquisition unit 14 may acquire a vibration amount as a physical quantity. In this case, a vibration sensor is disposed in the vicinity of the assembly position of the connector 60 and the cable 70, and the vibration sensor is connected to the assembly quality determination device 10. The A / D converter 11 converts the analog vibration amount measured by the vibration sensor into a digital vibration amount, and the physical quantity information acquisition unit 14 acquires the digital vibration amount from the A / D converter 11. The determination unit 21 determines whether or not the assembly of the connector 60 and the cable 70 has been normally performed according to whether or not the vibration amount satisfies the determination condition. For example, the determination unit 21 extracts the amplitude value of the vibration amount from the vibration amount as a feature amount. The determination unit 21 determines whether the extracted feature amount satisfies the determination condition indicating the range of the amplitude value of the vibration amount when the connector 60 and the cable terminal 71 are fitted to each other. It is determined whether or not the assembling is normally performed. As described above, even when the vibration amount is used, whether the assembly is good or not can be determined as in the case where the sound information is used. Note that the frequency of the vibration amount may be used instead of the amplitude value of the vibration amount.

  The determination condition in this case is set in the same manner as when the determination condition setting unit 19 sets the determination condition based on the sound information classification result. That is, the physical quantity information classification unit 17 classifies the vibration amount based on the determination result acquired by the determination result information acquisition unit 16, and the determination condition setting unit 19 sets a determination criterion based on the vibration amount classification result.

  In the above-described embodiment, the timing information acquisition unit 13 acquires the insertion start time and insertion end time of the cable terminal 71 into the hole of the connector 60 as timing information. On the other hand, only the insertion start time of the cable terminal 71 may be acquired as the timing information. When the insertion time of the cable terminal 71 is known in advance, the physical quantity information acquisition unit 14 acquires the sound information from the A / D converter 11 for a predetermined insertion time from the insertion start time. Sound information from the start of insertion to the end of insertion can be acquired. Moreover, the timing information acquisition part 13 may acquire only the insertion end time of the cable terminal 71 as timing information. When the insertion time of the cable terminal 71 is known in advance, the physical quantity information acquisition unit 14 acquires the sound information from the time that is back from the insertion end time by the insertion time to the insertion end time. Sound information from the start of insertion to the end of insertion can be acquired.

  In addition, the physical quantity information acquisition unit 14 acquires sound information from the A / D converter 11 from the insertion start time to the insertion end time, but from the insertion start time to the insertion end time, A / D The D converter 11 or the microphone 25 may be operated. Thereby, the physical quantity information acquisition unit 14 can acquire sound information including a sound between the insertion start time and the insertion end time.

  In addition, the determination unit 21 determines whether or not the assembly is normally performed by comparing the threshold indicated by the determination condition and the physical quantity, but the determination method is not limited to such threshold processing. . For example, the determination unit 21 calculates a similarity between the physical quantity of the rock sound set by the determination condition setting unit 19 and the physical quantity acquired by the physical quantity information acquisition unit 14, and the similarity is equal to or higher than a predetermined similarity threshold. In this case, it may be determined that the assembly has been performed normally. In addition, the determination unit 21 determines whether or not the assembly is normally performed using a machine learning approach such as a neural network, a support vector machine, a decision tree, a random forest, a logistic regression analysis, a naive Bayes classifier, and a k-nearest neighbor method. May be determined. The determination condition setting unit 19 calculates the determination conditions based on these determination methods based on the classification result information stored in the classification result information storage unit 18.

  Further, as shown in FIG. 7, the determination result information stored in the determination result information storage unit 22 includes both “normal” and “abnormal” determination results, but only the “abnormal” determination results. May be included. The reason why the operator checks after the product is completed is that the product with the determination result “abnormal” is required, and the product with the determination result “normal” does not need to be checked.

  Further, as shown in FIG. 7, the determination result information storage unit 22 stores information on the connector type, pin number, and terminal type in association with the determination result. However, the information associated with the determination result is not limited to these. For example, a product identifier or the like may be associated with the determination result. In this case, the type information acquisition unit 15 receives the product identifier from the PLC 50.

  Further, as shown in FIG. 6, the determination condition information storage unit 20 stores the determination condition and the type information in association with each other as the determination condition information. The condition and the identifier of the determination condition may be associated with each other and stored as determination condition information. In this case, the type information acquisition unit 15 acquires the identifier of the determination condition from the PLC 50 instead of the type information. The physical quantity information classification unit 17 classifies the sound information for each identifier of the determination condition, and the determination condition setting unit 19 sets the determination condition for each identifier. The determination unit 21 acquires a determination condition associated with the identifier from the determination condition information storage unit 20 based on the identifier. As a result, it is not necessary to store determination conditions for each type of connector 60 or each type of cable 70, and the number of determination conditions stored in the determination condition information storage unit 20 can be reduced. The identifier of the determination condition may be associated with the type information on a one-to-one basis, or a plurality of type information may be associated with one identifier.

  The physical quantity information classification unit 17 classifies the sound information based on the type information of the connector 60 and the cable 70 acquired by the type information acquisition unit 15, and the determination unit 21 determines the determination condition information based on the type information. A determination condition corresponding to the type information is read from the storage unit 20. However, information used for classification of sound information and information associated with determination conditions are not limited to such type information. For example, the physical quantity information classification unit 17 classifies sound information using the insertion stroke amount of the cable 70, the diameter of the cable 70, the material of the cable terminal 71, the size of the cable terminal 71, the insertion speed of the cable 70, the temperature, and the like. The determination condition setting unit 19 may set determination conditions corresponding to these pieces of information. The type information acquisition unit 15 acquires the exemplified information from the PLC 50. Based on the information acquired by the type information acquisition unit 15, the determination unit 21 reads the determination condition corresponding to the information from the determination condition information storage unit 20 and performs assembly quality determination processing.

  Moreover, the assembly quality determination device 10 may perform assembly quality determination processing based on one determination condition. In this case, the type information acquisition unit 15 is not necessary.

  Further, the classification result information storage unit 18, the determination condition information storage unit 20, and the determination result information storage unit 22 described in the above embodiment may be installed outside the assembly quality determination device 10. That is, the assembly quality determination device 10 is exchanged with the classification result information storage unit 18, the determination condition information storage unit 20, and the determination result information storage unit 22 that are provided outside. Data may be read and written between

  Further, some or all of the constituent elements constituting the assembly pass / fail determination apparatus 10 may be configured by one system LSI. The system LSI is an ultra-multifunctional LSI manufactured by integrating a plurality of components on a single chip, and specifically, a computer system including a microprocessor, ROM, RAM, and the like. . A computer program is stored in the RAM. The system LSI achieves its functions by the microprocessor operating according to the computer program.

  Further, the present invention may be the method described above. Further, the present invention may be a computer program that realizes these methods by a computer.

  Furthermore, the present invention may be a computer-readable non-transitory recording medium such as a hard disk drive, a CD-ROM, or a semiconductor memory.

Each step included in the program may be executed by a plurality of computers. For example, the learning mode process may be performed by a server, and the operation mode process may be performed by a tablet device.
Furthermore, the above embodiment and the above modification examples may be combined.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Production system 10 Assembly quality determination apparatus 11 A / D converter 12 Communication I / F part 13 Timing information acquisition part 14 Physical quantity information acquisition part 15 Type information acquisition part 16 Determination result information acquisition part 17 Physical quantity information classification part 18 Classification result information Storage unit 19 Determination condition setting unit 20 Determination condition information storage unit 21 Determination unit 22 Determination result information storage unit 23 Determination result information output unit 25 Microphone 30 Robot 31 Holding unit 40 Belt conveyor 60 Connector 61 Claw unit 70 Cable 71 Cable terminal 72 Hole Part 80 tensile testing equipment

Claims (10)

A timing information acquisition unit that acquires timing information indicating the assembly timing of the first article and the second article;
Based on the timing information acquired by the timing information acquisition unit, a physical quantity information acquisition unit that acquires physical quantity information generated when assembling the first article and the second article;
This is determination result information indicating whether or not the first article and the second article have been normally assembled, and the assembly is normally performed without using the physical quantity information acquired by the physical quantity information acquisition unit. A determination result information acquisition unit that acquires the determination result information obtained by determining whether or not
A physical quantity information classification unit that classifies the physical quantity information acquired by the physical quantity information acquisition unit based on the determination result information acquired by the determination result information acquisition unit;
The physical quantity information classification unit classifies a determination condition for determining that the first article and the second article have been normally assembled using the physical quantity information acquired by the physical quantity information acquisition unit. A determination condition setting unit that is set based on the physical quantity information;
The first article and the second article are normally assembled according to whether the physical quantity information acquired by the physical quantity information acquisition unit satisfies the determination condition set by the determination condition setting unit. An assembly pass / fail judgment device comprising: a judgment unit for judging whether or not. The assembly quality determination device according to claim 1, wherein the determination condition setting unit sets the determination condition when a first predetermined condition is satisfied. The assembly quality determination device according to claim 1, wherein the determination condition setting unit resets the determination condition when a second predetermined condition is satisfied. The assembly quality determination device according to claim 1, wherein the determination condition setting unit notifies predetermined information to the outside when a second predetermined condition is satisfied. 5. The assembly pass / fail determination apparatus according to claim 3, wherein the second predetermined condition is a condition related to a comparison between an abnormality occurrence rate of the assembly based on a determination result by the determination unit and a reference value. The assembly quality determination device according to claim 5, wherein the reference value is a value based on an abnormality occurrence rate of the assembly determined based on the determination result information acquired by the determination result information acquisition unit. The first article is a connector;
The assembly quality determination device according to claim 1, wherein the second article is a cable having a cable terminal. The assembly quality determination device according to claim 7, wherein the determination result information acquisition unit acquires the determination result information obtained by a tensile test of the cable or the determination result information obtained by a continuity test of the cable. Obtaining timing information indicating assembly timing of the first article and the second article;
Acquiring physical quantity information generated when assembling the first article and the second article based on the acquired timing information;
Determination result information indicating whether or not the assembly of the first article and the second article has been normally performed, and whether or not the assembly has been normally performed without using the acquired physical quantity information. Obtaining the determination result information obtained by the determination;
Classifying the acquired physical quantity information based on the acquired determination result information;
Setting a determination condition for determining that the assembly of the first article and the second article is normally performed using the acquired physical quantity information based on the classified physical quantity information; ,
Determining whether or not assembly of the first article and the second article has been normally performed according to whether the acquired physical quantity information satisfies the set determination condition. Assembly quality judgment method. A timing information acquisition unit that acquires timing information indicating the assembly timing of the first article and the second article;
Based on the timing information acquired by the timing information acquisition unit, a physical quantity information acquisition unit that acquires physical quantity information generated when assembling the first article and the second article;
This is determination result information indicating whether or not the first article and the second article have been normally assembled, and the assembly is normally performed without using the physical quantity information acquired by the physical quantity information acquisition unit. A determination result information acquisition unit that acquires the determination result information obtained by determining whether or not
A physical quantity information classification unit that classifies the physical quantity information acquired by the physical quantity information acquisition unit based on the determination result information acquired by the determination result information acquisition unit;
The physical quantity information classification unit classifies a determination condition for determining that the first article and the second article have been normally assembled using the physical quantity information acquired by the physical quantity information acquisition unit. A determination condition setting unit that is set based on the physical quantity information;
The first article and the second article are normally assembled according to whether the physical quantity information acquired by the physical quantity information acquisition unit satisfies the determination condition set by the determination condition setting unit. An assembly pass / fail judgment program for causing a computer to function as a judgment unit for judging whether or not it has been.