Inspection system and inspection method

Abstract

To improve inspection accuracy of a speaker mounted on a vehicle.SOLUTION: An inspection system 1 comprises: two or more microphone units 24 that are disposed side by side in a vehicle 10; and a pass-fail determining unit 60 that causes an inspection-target speaker 22 of one or more speakers 22 mounted on the vehicle 10 to output an inspection sound and determines, on the basis of a sound picked up by a main microphone unit and a sound picked up by one or more satellite microphone units, whether the inspection-target speaker 22 passes or fails. The main microphone unit is a microphone unit 24 of the two or more microphone units 24 that is disposed at a position corresponding to a position of the inspection-target speaker 22. The one or more satellite microphone units are at least one microphone unit 24 of the two or more microphone units 24 excluding the main microphone unit.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an inspection system and an inspection method for inspecting speakers mounted in a vehicle. [Background technology]

[0002] For example, Patent Document 1 discloses a method for inspecting in-vehicle speakers when a vehicle is completed. In this inspection method, a sound-collecting microphone with selectable directivity is placed inside the vehicle cabin. Then, a test sound is generated from the speaker to be inspected, and the test sound is picked up by the sound-collecting microphone. In this inspection method, the pass / fail of the speaker is judged based on the picked-up sound. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-171193 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, vehicle speaker inspections are generally performed in noisy environments such as factories. For this reason, the sound picked up by the microphone contains a lot of noise. As a result, there is a risk that erroneous judgments will be made during speaker inspection due to the influence of the noise contained in the picked-up sound. For this reason, there is a demand for improved accuracy in speaker inspections based on the picked-up sound.

[0005] Therefore, an object of the present invention is to provide an inspection system and an inspection method that can improve the inspection accuracy of speakers mounted in vehicles. [Means for solving the problem]

[0006] In order to solve the above problems, the inspection system of the present invention includes a plurality of microphone units arranged side by side in a vehicle, and a pass / fail determination unit that generates a test sound from a speaker to be inspected among one or more speakers mounted in the vehicle, and determines whether the speaker to be inspected passes or fails based on the sound picked up by a main microphone unit, which is a microphone unit among the plurality of microphone units at a position corresponding to the position of the speaker to be inspected, and the sound picked up by one or more satellite microphone units, which is at least one microphone unit other than the main microphone unit among the plurality of microphone units. The pass / fail determination unit determines that the speaker being tested passes if the sound picked up by the main microphone unit satisfies a first pass condition, and if the sound picked up by a satellite microphone unit that is the shortest distance from the main microphone unit among the one or more satellite microphone units satisfies a second pass condition. . In order to solve the above problems, the inspection system of the present invention includes a plurality of microphone units arranged side by side in a vehicle, and a pass / fail determination unit that generates a test sound from a speaker to be inspected among one or more speakers mounted in the vehicle, and determines whether the speaker to be inspected passes or fails based on the sound picked up by a main microphone unit, which is a microphone unit among the plurality of microphone units at a position corresponding to the position of the speaker to be inspected, and the sound picked up by one or more satellite microphone units, which is at least one microphone unit other than the main microphone unit among the plurality of microphone units. Furthermore, when the distance from the main microphone unit to the first satellite microphone unit, which is the adjacent satellite microphone unit along the first direction, and the distance from the main microphone unit to the second satellite microphone unit, which is the adjacent satellite microphone unit along the second direction, are the same, the pass / fail judgment unit judges that the speaker being tested has passed if the sound picked up by the main microphone unit satisfies the first pass condition and if the sound picked up by either or both of the first satellite microphone unit and the second satellite microphone unit satisfies the second pass condition.

[0010] The acceptable range for passing under the second pass condition may be wider than the acceptable range for passing under the first pass condition.

[0012] In order to solve the above problems, an inspection method of the present invention includes generating a test sound from a speaker to be inspected among one or more speakers mounted on a vehicle, and judging whether the speaker to be inspected passes or fails based on the sound picked up by a main microphone unit, which is a microphone unit at a position corresponding to the position of the speaker to be inspected among a plurality of microphone units arranged side by side in the vehicle, and the sound picked up by one or more satellite microphone units, which is at least one microphone unit other than the main microphone unit among the plurality of microphone units. and judging whether the speaker passes or fails includes judging that the speaker to be tested passes when the sound picked up by the main microphone unit satisfies a first pass condition and when the sound picked up by a satellite microphone unit that is the shortest distance from the main microphone unit, among the one or more satellite microphone units, satisfies a second pass condition. . In order to solve the above problem, an inspection method of the present invention includes generating a test sound from a speaker to be inspected among one or more speakers mounted on a vehicle, and determining whether the speaker to be inspected passes or fails based on sound picked up by a main microphone unit, which is a microphone unit at a position corresponding to the position of the speaker to be inspected among multiple microphone units arranged side by side in the vehicle, and sound picked up by one or more satellite microphone units, which are at least one microphone unit other than the main microphone unit among the multiple microphone units. When the distance from the main microphone unit to a first satellite microphone unit, which is an adjacent satellite microphone unit along a first direction, and the distance from the main microphone unit to a second satellite microphone unit, which is an adjacent satellite microphone unit along a second direction, are the same, determining whether the speaker passes or fails includes determining that the speaker to be inspected passes if the sound picked up by the main microphone unit satisfies a first pass condition and if the sound picked up by either one or both of the first satellite microphone unit and the second satellite microphone unit satisfies a second pass condition. Effect of the Invention

[0013] According to the present invention, it is possible to improve the inspection accuracy of speakers mounted in vehicles. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic diagram showing a configuration of an inspection system according to a first embodiment. [Diagram 2]FIG. 2 is a diagram for explaining an example of a first pass condition and a second pass condition. [Diagram 3] 5 is a diagram illustrating an example of a relationship between an individual judgment result and a comprehensive judgment result of the microphone unit in the first embodiment. FIG. [Figure 4] 10A and 10B are diagrams illustrating another example of the relationship between the individual judgment result and the overall judgment result of the microphone unit in the first embodiment. [Diagram 5] 5 is a flowchart illustrating the flow of operations of a pass / fail determination unit according to the first embodiment. [Figure 6] 13 is a diagram illustrating an example of a relationship between an individual judgment result and a comprehensive judgment result of a microphone unit according to the second embodiment. FIG. [Figure 7] 13 is a flowchart illustrating the flow of operations of a pass / fail determination unit according to the second embodiment. [Figure 8] 13 is a diagram illustrating an example of a relationship between an individual judgment result and a comprehensive judgment result of a microphone unit according to the third embodiment. FIG. [Figure 9] 13 is a flowchart illustrating the flow of operations of a pass / fail determination unit according to the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values ​​shown in the embodiment are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In this specification and drawings, elements having substantially the same functions and configurations are given the same reference numerals to avoid repeated explanations, and elements not directly related to the present invention are not shown.

[0016] (First embodiment) Fig. 1 is a schematic diagram showing the configuration of an inspection system 1 according to a first embodiment. The inspection system 1 includes a vehicle 10 and an audio unit 12. For ease of explanation, Fig. 1 shows the vehicle 10 as seen through from above. The vehicle 10 includes a seat 20, a plurality of speakers 22a, 22b, 22c, and a plurality of microphone units 24a, 24b, 24c.

[0017] The seats 20 are provided in a vehicle interior 30. Three rows of seats 20 are provided in the front-rear direction of the vehicle 10. Each seat 20 includes a backrest 32. The backrest 32 is located on the rear side of the seat 20 and supports an occupant.

[0018] The space inside the vehicle interior 30 is divided into three rows by backrests 32. The backrest 32 of the first row seat 20 divides the first row (front row) space from the second row (center row) space. The backrest 32 of the second row seat 20 divides the second row (center row) space from the third row (rearmost row) space.

[0019] Hereinafter, the space in front of the backrest 32 of the first row seat 20 may be referred to as a first space 34a. Also, the space between the backrest 32 of the first row seat 20 and the backrest 32 of the second row seat 20 may be referred to as a second space 34b. Also, the space behind the backrest 32 of the second row seat 20 may be referred to as a third space 34c. Also, the spaces within the passenger compartment 30 are connected vertically above the backrest 32.

[0020] The speakers 22a, 22b, and 22c are arranged with their sound emitting surfaces facing the inside of the vehicle compartment 30. The speaker 22a is arranged in the door 36 of the first row. Therefore, the speaker 22a is arranged corresponding to the first space 34a (first row). The speaker 22b is arranged in the door 36 of the second row. Therefore, the speaker 22b is arranged corresponding to the second space 34b (second row). The speaker 22c is arranged in the door 36 of the third row. Therefore, the speaker 22c is arranged corresponding to the third space 34c (third row).

[0021] Hereinafter, the speakers 22a, 22b, and 22c may be collectively referred to as the speaker 22. The number of the speakers 22 is not limited to three, but may be any number. The speaker 22 is not limited to being disposed in the door 36, but may be disposed at any position in the vehicle 10.

[0022] In the inspection system 1, the inspection of the multiple speakers 22 mounted on the vehicle 10 is performed. In the inspection of the speakers 22, it is confirmed whether the speakers 22 can appropriately generate (sound) a predetermined test sound. During the inspection, first, one speaker 22 to be inspected (test subject) is set from the multiple speakers 22. Then, the set test subject speaker 22 is made to generate a test sound. If it is confirmed that the test sound is appropriately generated, the test subject speaker 22 is judged to pass. If it is not possible to confirm that the test sound is generated, or if the confirmed sound is different from the test sound, the test subject speaker 22 is judged to fail. After that, the test subjects are switched in order, and pass / fail judgments are made for all the speakers 22 in order. In the inspection system 1, the inspection of the speakers 22 is performed using the multiple microphone units 24a, 24b, and 24c mounted on the vehicle 10.

[0023] The microphone units 24a, 24b, and 24c are provided in the vehicle interior 30. For example, the microphone units 24a, 24b, and 24c are provided on the inner surface of the roof. The microphone unit 24a is disposed within a range facing the first space 34a in the roof. Therefore, the microphone unit 24a is disposed corresponding to the first space 34a (first row). The microphone unit 24b is disposed within a range facing the second space 34b in the roof. Therefore, the microphone unit 24b is disposed corresponding to the second space 34b (second row). The microphone unit 24c is disposed within a range facing the third space 34c in the roof. Therefore, the microphone unit 24c is disposed corresponding to the third space 34c (third row).

[0024] Hereinafter, microphone units 24a, 24b, and 24c may be collectively referred to as microphone unit 24. Microphone units 24 are arranged in each space of a row separated by backrest 32. Furthermore, microphone units 24 may be arranged at any position within the range of each corresponding space (row).

[0025] The microphone unit 24 includes two microphone elements 40. Each of the two microphone elements 40 can pick up surrounding sounds. The two microphone elements 40 work together, so that the microphone unit 24 can distinguish sounds from a desired direction with high sensitivity, comparing them with sounds from other directions. In other words, the microphone unit 24 is capable of selecting the directional direction.

[0026] For example, the sound of the sound source reaches the microphone element 40 that is relatively closer to the sound source out of the two microphone elements 40 before the microphone element 40 that is relatively farther from the sound source. Therefore, the sound picked up by the microphone element 40 that is closer to the sound source (preceding sound) is delayed and added to the sound picked up by the microphone element 40 that is farther from the sound source (following sound). If the delay time of the preceding sound is set to an appropriate time according to the position of the sound source, the phases of the preceding sound and the following sound are aligned. This allows the microphone unit 24 to distinguish, from among the picked-up sounds, the sound from the direction of the sound source's localization with better sensitivity than sounds from other directions.

[0027] The audio unit 12 includes an inspection control unit 50, a storage unit 52, and a user interface 54. In addition, in Fig. 1, the user interface 54 is written as UI.

[0028] The inspection control unit 50 is configured with a semiconductor integrated circuit including a central processing unit (CPU), a ROM in which programs etc. are stored, a RAM as a work area etc. The inspection control unit 50 functions as a pass / fail determination unit 60 by executing a program.

[0029] The pass / fail determination unit 60 identifies the speaker 22 to be tested, and generates a test sound from the speaker 22. The pass / fail determination unit 60 causes each microphone unit 24 to pick up the test sound generated from the speaker 22. The pass / fail determination unit 60 determines whether the speaker 22 to be tested passes or fails based on the sound picked up by the microphone unit 24. The pass / fail determination unit 60 will be described in detail later.

[0030] The storage unit 52 is, for example, a non-volatile memory such as a flash memory or a hard disk drive. Various data related to the test are stored in the storage unit 52. For example, the waveform pattern (waveform data) of the test sound is stored in the storage unit 52. The storage unit 52 may also store the waveform pattern of the sound collected by the microphone unit 24. The storage unit 52 may also store a pass / fail result.

[0031] The user interface 54 can assist in input operations such as various settings related to the inspection, etc. The user interface 54 can also display the pass / fail result on a display.

[0032] The pass / fail determination unit 60 sets the microphone unit 24 in the space of the row corresponding to the position of the speaker 22 to be inspected as the main microphone unit. For example, assume that the speaker 22b located in the door 36 in the second row is set as the speaker to be inspected. In this case, the microphone unit 24b in the second row is set as the main microphone unit.

[0033] Furthermore, the pass / fail determination unit 60 determines the microphone units in the rows other than the row of the main microphone unit as sub-microphone units. For example, when the microphone unit 24b in the second row is the main microphone unit, the microphone unit 24a in the first row and the microphone unit 24c in the third row are determined as sub-microphone units.

[0034] The pass / fail determination unit 60 determines the pass / fail of the speaker 22 to be tested by using at least one row of the sub-microphone units in addition to the main microphone unit. The pass / fail determination unit 60 sets the sub-microphone units used to determine the pass / fail of the speaker 22 to be tested as satellite microphone units.

[0035] The pass / fail judgment unit 60 judges the pass / fail of the speaker 22 being tested based on the sound picked up by the main microphone unit and the sound picked up by the satellite microphone unit arranged in the space of one or more rows other than the row of the main microphone unit.

[0036] Specifically, the pass / fail determination unit 60 sets the sub microphone unit that is the shortest distance from the main microphone unit as the satellite microphone unit among the sub microphone units. Then, the pass / fail determination unit 60 determines whether the speaker 22 to be inspected passes or fails when the sound picked up by the main microphone unit satisfies a predetermined first pass condition and the sound picked up by the satellite microphone unit satisfies a predetermined second pass condition.

[0037] Here, distance A10 indicated by an arrow in Fig. 1 indicates the front microphone unit distance, which is the distance between microphone unit 24a in the first row and microphone unit 24b in the second row, and distance A12 indicated by an arrow in Fig. 1 indicates the rear microphone unit distance, which is the distance between microphone unit 24b in the second row and microphone unit 24c in the third row.

[0038] For example, it is assumed that the front microphone unit distance (distance A10) is shorter than the rear microphone unit distance (distance A12).

[0039] In this example, if the microphone unit 24a in the first row is the main microphone unit, the microphone unit 24b in the second row is the satellite microphone unit. If the microphone unit 24b in the second row is the main microphone unit, the microphone unit 24a in the first row is the satellite microphone unit. If the microphone unit 24c in the third row is the main microphone unit, the microphone unit 24b in the second row is the satellite microphone unit.

[0040] FIG. 2 is a diagram for explaining an example of the first pass condition and the second pass condition. In FIG. 2, the parameters are elements (acoustic characteristics) for identifying the test sound. The parameters are, for example, sound pressure (loudness of the sound) or pitch (frequency of the sound). The parameters are not limited to sound pressure or pitch, and can be set appropriately, for example, sound reception timing (time difference between sound generation and reception). FIG. 2 illustrates the transition of sound pressure, which is an example of a parameter. Hereinafter, for convenience of explanation, the parameter will be explained as sound pressure, but even if the parameter is pitch, the first pass condition and the second pass condition can be set in the same manner as sound pressure.

[0041] A solid line B10 indicates the change in the sound pressure of the test sound. A dashed line B12 indicates the change in the upper pass limit of the sound pressure of the sound picked up by the main microphone unit. A dashed line B14 indicates the change in the lower pass limit of the sound pressure of the sound picked up by the main microphone unit. A dashed line B16 indicates the change in the upper pass limit of the sound pressure of the sound picked up by the satellite microphone unit. A dashed line B18 indicates the change in the lower pass limit of the sound pressure of the sound picked up by the satellite microphone unit. The upper and lower pass limits of the main microphone unit and the upper and lower pass limits of the satellite microphone unit are set in advance for each parameter.

[0042] Arrow C10 indicates the width from the lower pass limit value of the main microphone unit to the upper pass limit value of the main microphone unit. In other words, arrow C10 is a corridor indicating the pass tolerance range of the main microphone unit. The first pass condition is, for example, that the parameters of the sound picked up by the main microphone unit are within the corridor of the main microphone unit. If the sound picked up by the main microphone unit satisfies the first pass condition, the main microphone unit is individually determined to be pass.

[0043] Arrow C12 indicates the width from the lower pass limit value of the satellite microphone unit to the upper pass limit value of the satellite microphone unit. In other words, arrow C12 is a corridor indicating the acceptable pass range of the satellite microphone unit. The second pass condition is, for example, that the parameters of the sound picked up by the satellite microphone unit are within the corridor of the satellite microphone unit. If the sound picked up by the satellite microphone unit satisfies the second pass condition, the satellite microphone unit is individually determined to be pass.

[0044] The upper pass limit for the satellite microphone unit (dash-two dotted line B16) is set higher than the upper pass limit for the main microphone unit (dash-dotted line B12). The lower pass limit for the satellite microphone unit (dash-two dotted line B18) is set lower than the lower pass limit for the main microphone unit (dash-dotted line B14).

[0045] For this reason, the corridor of the satellite microphone unit (arrow C12) is wider than the corridor of the main microphone unit (arrow C10). In other words, the second pass condition has a wider pass tolerance range than the first pass condition. This is because the satellite microphone unit is farther from the sound source of the test sound than the main microphone unit, and the picked up sound is more likely to contain noise.

[0046] FIG. 3 is a diagram illustrating an example of the relationship between the individual judgment result and the overall judgment result of the microphone unit 24 according to the first embodiment. FIG. 3 shows a case where the front microphone unit distance (distance A10 in FIG. 1) is shorter than the rear microphone unit distance (distance A12 in FIG. 1). In FIG. 3, a solid thick frame D10 indicates the individual judgment result of the main microphone unit. Also, a dashed frame D12 indicates the individual judgment result of the satellite microphone unit. "PASS" indicates that the individual judgment result is pass. "FAIL" indicates that the individual judgment result is fail.

[0047] In the example of Fig. 3, when the test target is the speaker 22a in the first row, the microphone unit 24a in the first row is set as the main microphone unit, and the microphone unit 24b in the second row is set as the satellite microphone unit. In this case, the test target is comprehensively judged as "passed" only when the microphone unit 24a in the first row, which is the main microphone unit, is "PASS" and the microphone unit 24b in the second row, which is the satellite microphone unit, is "PASS". In this case, it does not depend on the individual judgment result of the microphone unit 24c in the third row, which is the sub microphone unit.

[0048] Also, when the test target is the speaker 22b in the second row, the microphone unit 24b in the second row is set as the main microphone unit, and the microphone unit 24a in the first row is set as the satellite microphone unit. In this case, the test target is comprehensively judged as "passed" only when the microphone unit 24b in the second row, which is the main microphone unit, is "PASS" and the microphone unit 24a in the first row, which is the satellite microphone unit, is "PASS". In this case, it does not depend on the individual judgment result of the microphone unit 24c in the third row, which is the sub microphone unit.

[0049] Also, when the test target is the speaker 22c in the third row, the microphone unit 24c in the third row is set as the main microphone unit, and the microphone unit 24b in the second row is set as the satellite microphone unit. In this case, the test target is comprehensively judged as "passed" only when the microphone unit 24c in the third row, which is the main microphone unit, is "PASS" and the microphone unit 24b in the second row, which is the satellite microphone unit, is "PASS". In this case, it does not depend on the individual judgment result of the microphone unit 24a in the first row, which is the sub microphone unit.

[0050] 3, the multiple microphone units 24 are arranged so that the front microphone unit distance is shorter than the rear microphone unit distance. However, the multiple microphone units 24 can also be arranged so that the front microphone unit distance is longer than the rear microphone unit distance.

[0051] Fig. 4 is a diagram for explaining another example of the relationship between the individual judgment result and the overall judgment result of the microphone unit 24 according to the first embodiment. Fig. 4 shows a case where the front microphone unit distance (distance A10 in Fig. 1) is longer than the rear microphone unit distance (distance A12 in Fig. 1). In Fig. 4, the meanings of the solid thick frame D10, the dashed frame D12, "PASS" and "FAIL" are the same as those in Fig. 3. Also, in Fig. 4, parts where the overall judgment result differs from Fig. 3 are indicated by hatching.

[0052] As shown in FIG. 4, when the test target is the speaker 22a in the first row, or when the test target is the speaker 22c in the third row, the test is the same as in FIG.

[0053] 4, when the test target is the speaker 22b in the second row, the microphone unit 24b in the second row is set as the main microphone unit, and the microphone unit 24c in the third row is set as the satellite microphone unit. In this case, the test target is comprehensively judged as "passed" only when the microphone unit 24b in the second row, which is the main microphone unit, is "PASS" and the microphone unit 24c in the third row, which is the satellite microphone unit, is "PASS". In this case, it does not depend on the individual judgment result of the microphone unit 24a in the first row, which is the sub microphone unit.

[0054] Fig. 5 is a flowchart illustrating the flow of operations of the pass / fail determination unit 60 according to the first embodiment. The pass / fail determination unit 60 performs the series of processes in Fig. 5 when, for example, an instruction to start a test is given via the user interface 54. Moreover, the pass / fail determination unit 60 repeats the series of processes in Fig. 5 every time the speaker 22 to be tested is switched.

[0055] First, the pass / fail determination unit 60 sets the speaker 22 to be inspected from among the multiple speakers 22 (S100). Next, the pass / fail determination unit 60 sets a main microphone unit corresponding to the speaker 22 to be inspected from among the multiple microphone units 24 (S110). At this time, the pass / fail determination unit 60 sets the directivity direction of the main microphone unit to the direction in which the speaker 22 to be inspected is assumed to be present.

[0056] Next, the pass / fail determination unit 60 sets the satellite microphone unit based on the main microphone unit, the front microphone unit distance, and the rear microphone unit distance (S120). At this time, the pass / fail determination unit 60 sets the directivity direction of the satellite microphone unit to the direction in which the speaker 22 to be inspected is assumed to be present. The front microphone unit distance and the rear microphone unit distance are stored in the storage unit 52 in advance.

[0057] Next, the pass / fail determination unit 60 causes the speaker 22 to generate a test sound (S130), and then causes each microphone unit 24 to pick up the test sound (S140).

[0058] Next, the pass / fail determination unit 60 analyzes the waveform of the sound picked up by the microphone unit 24 set as the main microphone unit (picked up sound waveform), and derives parameters of the picked up sound waveform (S150).

[0059] Next, the pass / fail determination unit 60 determines whether the main microphone unit is PASS (S160). Specifically, the pass / fail determination unit 60 determines that the main microphone unit is PASS if the parameters of the sound waveform picked up by the main microphone unit satisfy the first pass condition.

[0060] If the main microphone unit is PASS (YES in S160), the pass / fail determination unit 60 analyzes the waveform of the sound picked up by the microphone unit 24 set as the satellite microphone unit (picked up sound waveform) and derives parameters of the picked up sound waveform (S170).

[0061] Next, the pass / fail determination unit 60 determines whether the satellite microphone unit is PASS (S180). Specifically, the pass / fail determination unit 60 determines that the satellite microphone unit is PASS if the parameters of the collected waveform of the satellite microphone unit satisfy the second pass condition.

[0062] If the satellite microphone unit is PASS (YES in S180), the pass / fail determination section 60 determines that the speaker 22 being inspected is pass (S190) and ends the process.

[0063] Furthermore, in step S160, if the main microphone unit is determined to be FAIL (NO in S160), the pass / fail determination section 60 determines that the speaker 22 being inspected has failed (S200) and ends the process.

[0064] Also, in step S180, if the satellite microphone unit is determined to be FAIL (NO in S180), the pass / fail determination section 60 determines that the speaker 22 being inspected has failed (S200) and ends the process.

[0065] As described above, in the inspection system 1 according to the first embodiment, the pass / fail of the speaker 22 to be inspected is judged based on the sound picked up by the main microphone unit and the sound picked up by the satellite microphone unit. Therefore, for example, even if the main microphone unit judges a speaker 22 that actually fails to pass due to the influence of noise, the satellite microphone unit is judged to be FAIL, so that the overall judgment is judged to be fail. In this way, in the inspection system 1 according to the first embodiment, even in a noisy environment, erroneous judgments can be suppressed compared to the above comparison example.

[0066] Therefore, in the inspection system 1 according to the first embodiment, it is possible to improve the inspection accuracy of the speaker 22 mounted on the vehicle 10, as compared with the comparative example.

[0067] Furthermore, in the inspection system 1 according to the first embodiment, the pass / fail of the speaker 22 to be inspected is determined using a total of two rows of microphone units 24, including a main microphone unit and a satellite microphone unit. However, the pass / fail of the speaker 22 to be inspected may be determined using a total of three rows of microphone units 24 including the main microphone unit.

[0068] Furthermore, in the inspection system 1, the speaker 22 can be inspected using the microphone unit 24 mounted on the vehicle 10. Therefore, there is no need to prepare a new microphone unit 24 for inspection, and the inspection can be easily performed.

[0069] During the inspection, the seat 20 or the backrest 32 is positioned and oriented so as not to impede the generation of the inspection sound from the speaker 22 and the collection of the sound by the microphone unit 24. This makes it possible to further suppress the deterioration of the inspection accuracy.

[0070] Second embodiment In the first embodiment, an example was given in which the front microphone unit distance and the rear microphone unit distance are different, whereas in the second embodiment, a case will be described in which the front microphone unit distance and the rear microphone unit distance are the same.

[0071] Fig. 6 is a diagram for explaining an example of the relationship between the individual judgment result and the overall judgment result of the microphone unit 24 according to the second embodiment. In Fig. 6, the meanings of the solid thick frame D10, the dashed frame D12, "PASS" and "FAIL" are the same as those in Fig. 3 and Fig. 4. In Fig. 6, the parts of the overall judgment result that differ from Fig. 3 or Fig. 4 are indicated by hatching.

[0072] As shown in FIG. 6, when the test target is the speaker 22a in the first row, or when the test target is the speaker 22c in the third row, the test is the same as in FIG. 3 or FIG.

[0073] Here, the satellite microphone unit adjacent to the front side of the main microphone unit may be referred to as the first satellite microphone unit, and the satellite microphone unit adjacent to the rear side of the main microphone unit may be referred to as the second satellite microphone unit.

[0074] As described above, the distance from the main microphone unit to the first satellite microphone unit is the same as the distance from the main microphone unit to the second satellite microphone unit. In this case, pass / fail determination section 60 determines that speaker 22 to be inspected passes if the sound picked up by the main microphone unit satisfies a predetermined first pass condition and the sound picked up by either or both of the first satellite microphone unit and the second satellite microphone unit satisfies a predetermined second pass condition.

[0075] As shown in FIG. 6, when the microphone unit 24 in the second row is the main microphone unit, the microphone unit 24a in the first row is the first satellite microphone unit, and the microphone unit 24c in the third row is the second satellite microphone unit. In this case, if the microphone unit 24b in the second row is "PASS" and the microphone unit 24a in the first row is "PASS", the test object is determined to be "passed" overall even if the microphone unit 24c in the third row is "FAIL". Also, if the microphone unit 24b in the second row is "PASS" and the microphone unit 24c in the third row is "PASS", the test object is determined to be "passed" overall even if the microphone unit 24a in the first row is "FAIL". Note that if all of the microphone units 24a, 24b, and 24c are "PASS", the test object is determined to be "passed" overall.

[0076] Fig. 7 is a flowchart for explaining the flow of the operation of the pass / fail determination unit 60 according to the second embodiment. In Fig. 7, processes different from those in Fig. 5 are indicated by bold frames. Below, a description of the same processes as in Fig. 5 will be omitted, and only the different processes will be described.

[0077] When the main microphone unit is set to the microphone unit 24b in the second row (S110), the pass / fail determination unit 60 sets the microphone unit 24a in the first row as the first satellite microphone unit (S300). Then, the pass / fail determination unit 60 sets the microphone unit 24c in the third row as the second satellite microphone unit (S310).

[0078] If the main microphone unit is judged to have generated and collected a test sound, and the result is PASS (YES in S160), the pass / fail determination section 60 analyzes the waveform of the sound picked up by the first satellite microphone unit, and derives parameters of the waveform of the sound picked up (S320).

[0079] Next, the pass / fail determination unit 60 determines whether the first satellite microphone unit is PASS (S330). Specifically, the pass / fail determination unit 60 determines that the first satellite microphone unit is PASS if the parameters of the collected waveform of the first satellite microphone unit satisfy the second pass condition.

[0080] If the first satellite microphone unit is PASS (YES in S330), the pass / fail determination section 60 determines that the speaker 22 being inspected is pass (S190).

[0081] If the first satellite microphone unit is FAIL (NO in S330), the pass / fail determination section 60 analyzes the waveform of the sound picked up by the second satellite microphone unit and derives parameters of the waveform of the sound picked up (S340).

[0082] Next, the pass / fail determination unit 60 determines whether the second satellite microphone unit is PASS (S350). Specifically, the pass / fail determination unit 60 determines that the second satellite microphone unit is PASS if the parameters of the collected waveform of the second satellite microphone unit satisfy the second pass condition.

[0083] If the second satellite microphone unit is PASS (YES in S350), the pass / fail determination section 60 determines that the speaker 22 being inspected is pass (S190).

[0084] On the other hand, if the second satellite microphone unit is FAIL (NO in S350), the pass / fail determination section 60 determines that the speaker 22 being inspected has failed (S200).

[0085] In the inspection system 1 according to the second embodiment, similarly to the first embodiment, it is possible to improve the inspection accuracy of the speaker 22 mounted on the vehicle 10, as compared with the comparative example described above.

[0086] Third embodiment In the first and second embodiments, the pass / fail of the speaker 22 to be inspected was judged based on the main microphone unit and the satellite microphone units (the first satellite microphone unit and the second satellite microphone unit). In contrast, in the third embodiment, a plurality of sub microphone units are used equally as satellite microphone units.

[0087] Fig. 8 is a diagram for explaining an example of the relationship between the individual judgment result and the overall judgment result of the microphone unit 24 according to the third embodiment. In Fig. 8, the meanings of the solid thick frame D10, "PASS" and "FAIL" are the same as those in Fig. 6 etc. Also, in Fig. 8, the parts where the overall judgment result differs from Fig. 6 are indicated by hatching.

[0088] In the third embodiment, the pass / fail judgment unit 60 judges that the speaker 22 being tested passes if the sound picked up by the main microphone unit satisfies a predetermined first pass condition and if the sound picked up by any one or more rows of satellite microphone units among the multiple rows of satellite microphone units satisfies a predetermined second pass condition.

[0089] Therefore, for example, if the test subject is speaker 22a in the first row and microphone unit 24a in the first row is "PASS", even if microphone unit 24b in the second row is "FAIL", if microphone unit 24c in the third row is "PASS", the test subject will be overall judged to be "Pass".

[0090] Also, for example, if the test subject is speaker 22c in the third row and microphone unit 24c in the third row is "PASS," even if microphone unit 24b in the second row is "FAIL," if microphone unit 24a in the first row is "PASS," the test subject is overall judged to be "passed."

[0091] Fig. 9 is a flowchart for explaining the flow of the operation of the pass / fail determination unit 60 according to the third embodiment. In Fig. 9, processes different from those in Fig. 7 are indicated by bold frames. Below, a description of the same processes as in Fig. 7 will be omitted, and only the different processes will be described.

[0092] The pass / fail determination unit 60 sets one of the two sub microphone units (for example, the sub microphone unit relatively closer to the front) as the first satellite microphone unit (S400). The pass / fail determination unit 60 also sets the other sub microphone unit (for example, the sub microphone unit relatively closer to the rear) as the second satellite microphone unit (S410).

[0093] If the main microphone unit is PASS (YES in S160), the pass / fail determination unit 60 determines whether the first satellite microphone unit is PASS (S430) based on parameters derived by analyzing the collected waveform of the first satellite microphone unit (S420). If the first satellite microphone unit is PASS (YES in S430), the pass / fail determination unit 60 determines that the speaker 22 being inspected is PASS (S190).

[0094] If the first satellite microphone unit is FAIL (NO in S430), the pass / fail determination section 60 determines whether the second satellite microphone unit is PASS (S450) based on parameters derived by analyzing the collected sound waveform of the second satellite microphone unit (S440). If the second satellite microphone unit is PASS (YES in S450), the pass / fail determination section 60 determines that the speaker 22 being tested is PASS (S190). On the other hand, if the second satellite microphone unit is FAIL (NO in S450), the pass / fail determination section 60 determines that the speaker 22 being tested is FAILED (S200).

[0095] In the inspection system 1 according to the third embodiment, similarly to the first and second embodiments, it is possible to improve the inspection accuracy of the speaker 22 mounted on the vehicle 10, as compared with the comparative example described above.

[0096] Moreover, whether to use the pass / fail determination method of the third embodiment or the pass / fail determination method of the first or second embodiment can be appropriately set depending on the environment in which the inspection is performed. Moreover, by using the pass / fail determination method of the third embodiment, the standard for determining pass can be relaxed compared to the first or second embodiment.

[0097] In the third embodiment, the two rows of sub microphone units are used equally as satellite microphone units. However, when there are three or more rows of sub microphone units, the sub microphone units in the three or more rows may be used equally as satellite microphone units.

[0098] Although the embodiment of the present invention has been described above with reference to the attached drawings, it goes without saying that the present invention is not limited to such an embodiment. It is clear that a person skilled in the art can think of various modified or altered examples within the scope of the claims, and it is understood that such examples also naturally belong to the technical scope of the present invention.

[0099] For example, in each of the above embodiments, the vehicle 10 is provided with three rows of seats. However, the number of rows of seats is not limited to three, and may be two rows, or may be four or more rows. Even in this case, a microphone unit 24 is provided for each space of the rows. In addition, the arrangement positions of the multiple microphone units 24 arranged side by side in the vehicle 10 are not limited to being arranged side by side along the front-rear direction in the passenger compartment 30, unlike the above embodiments, and are also not limited to being arranged side by side in each space of the rows.

[0100] In the first or second embodiment, with respect to a sub-microphone unit that is not a main microphone unit or a satellite microphone unit (first satellite microphone unit or second satellite microphone unit) for the speaker 22 to be tested, its placement may be omitted and the pickup of the test sound may be omitted.

[0101] In each of the above embodiments, the test sound is collected using the microphone unit 24 mounted on the vehicle 10. However, if the microphone unit 24 that can serve as a main microphone unit or a satellite microphone unit (first satellite microphone unit or second satellite microphone unit) is not mounted on the vehicle 10, a microphone unit 24 may be disposed separately for testing.

[0102] In each of the above embodiments, the audio unit 12 is provided separately from the vehicle 10. However, the audio unit 12 itself, or each function of the audio unit 12, may be mounted on the vehicle 10. [Explanation of symbols]

[0103] 1. Inspection system 10 Vehicles 20 sheets 22 Speaker 24 Microphone unit 30 Cabin 32 Backrest 60 Pass / Fail Judgment Section

Claims

1. A plurality of microphone units arranged side by side in a vehicle; a pass / fail determination unit that generates a test sound from a speaker to be tested out of one or more speakers mounted on the vehicle, and determines whether the speaker to be tested passes or fails based on the sound picked up by a main microphone unit, which is a microphone unit among the multiple microphone units at a position corresponding to the position of the speaker to be tested, and the sound picked up by one or more satellite microphone units, which is at least one microphone unit other than the main microphone unit among the multiple microphone units; Equipped with The pass / fail judgment unit judges that the speaker being inspected has passed if the sound picked up by the main microphone unit satisfies a first pass condition and if the sound picked up by the satellite microphone unit, of the one or more satellite microphone units, that is located the shortest distance from the main microphone unit satisfies a second pass condition.

2. A plurality of microphone units arranged side by side in a vehicle; a pass / fail determination unit that generates a test sound from a speaker to be tested out of one or more speakers mounted on the vehicle, and determines whether the speaker to be tested passes or fails based on the sound picked up by a main microphone unit, which is a microphone unit among the multiple microphone units at a position corresponding to the position of the speaker to be tested, and the sound picked up by one or more satellite microphone units, which is at least one microphone unit other than the main microphone unit among the multiple microphone units; Equipped with When the distance from the main microphone unit to a first satellite microphone unit, which is the satellite microphone unit adjacent along a first direction, and the distance from the main microphone unit to a second satellite microphone unit, which is the satellite microphone unit adjacent along a second direction, are the same, The pass / fail judgment unit judges that the speaker being inspected passes if the sound picked up by the main microphone unit satisfies a first pass condition and the sound picked up by either or both of the first satellite microphone unit and the second satellite microphone unit satisfies a second pass condition.

3. 3. The inspection system according to claim 1, wherein an acceptable range for passing under the second pass condition is wider than an acceptable range for passing under the first pass condition.

4. generating a test sound from a speaker to be tested among one or more speakers mounted on a vehicle; determining whether the speaker to be inspected passes or fails based on a sound picked up by a main microphone unit, which is a microphone unit at a position corresponding to the position of the speaker to be inspected among a plurality of microphone units arranged side by side in the vehicle, and a sound picked up by one or a plurality of satellite microphone units, which is at least one of the microphone units other than the main microphone unit among the plurality of microphone units; Including, The inspection method includes determining whether the speaker passes or fails by determining that the speaker being inspected passes if the sound picked up by the main microphone unit satisfies a first pass condition and if the sound picked up by the satellite microphone unit, of the one or more satellite microphone units, that is located the shortest distance from the main microphone unit satisfies a second pass condition.

5. generating a test sound from a speaker to be tested among one or more speakers mounted on a vehicle; determining whether the speaker to be inspected passes or fails based on a sound picked up by a main microphone unit, which is a microphone unit at a position corresponding to the position of the speaker to be inspected among a plurality of microphone units arranged side by side in the vehicle, and a sound picked up by one or a plurality of satellite microphone units, which is at least one of the microphone units other than the main microphone unit among the plurality of microphone units; Including, When the distance from the main microphone unit to a first satellite microphone unit, which is the satellite microphone unit adjacent along a first direction, and the distance from the main microphone unit to a second satellite microphone unit, which is the satellite microphone unit adjacent along a second direction, are the same, The inspection method includes determining whether the speaker passes or fails by determining that the speaker being inspected passes if the sound picked up by the main microphone unit satisfies a first pass condition and the sound picked up by either or both of the first satellite microphone unit and the second satellite microphone unit satisfies a second pass condition.

Images