JP6443371B2 - Vehicle inspection method - Google Patents

Description

  The present invention relates to a vehicle inspection method including a plurality of speakers having different characteristics connected in parallel to a vehicle audio head unit and a vehicle sound collecting microphone, and more specifically, a plurality of speakers connected in parallel. The present invention relates to a vehicle inspection method for inspecting the quality of a speaker, such as the connection state and the presence or absence of a failure of the speaker.

A block diagram of a conventional audio system is shown in FIG.
As shown in FIG. 4, the conventional audio system includes an audio head unit 41, an audio amplifier 42, a high-pitched speaker 43 such as a tweeter disposed on the left front of the vehicle, and a left front of the vehicle. A low-frequency speaker 44 such as a woofer, a full-range type speaker 45 disposed at the rear left of the vehicle, a high-frequency speaker 46 disposed at the right front of the vehicle, and a right front speaker of the vehicle A low-frequency speaker 47 such as a woofer and a full-range type speaker 48 arranged on the right rear side of the vehicle are provided.

  The audio head unit 41 and the audio amplifier 42 are connected by a line L21. The audio amplifier 42 and the rear left and right speakers 45 and 48 are connected by independent lines L22 and L23, respectively, while two speakers on the left front of the vehicle. 43 and 44 are connected in parallel using lines L24 and L25. Similarly, the two speakers 46 and 47 on the right front side of the vehicle are also connected in parallel using lines L26 and L27.

  FIG. 5 shows a flowchart for inspecting the quality of the speaker, such as the connection state of the speaker and the presence or absence of a failure of the speaker, during the completion inspection of the assembly line of the vehicle equipped with the audio system of FIG.

A conventional vehicle inspection method will be described with reference to the flowchart shown in FIG.
In step S51, the audio head unit 41 is set to the speaker inspection mode, and in the next step S52, an inspection sound is generated for each of the speakers 43 to 48 from the audio head unit 41 to the audio amplifier 42 via the line L21. A sound source generation command is issued.

  Next, in step S53, in response to the above-described sound source generation instruction, the audio amplifier 42 sequentially generates inspection sounds having a frequency within the range of 100 to 200 Hz for each of the speakers 43 to 48.

  In this case, since the speakers 45 and 48 at the rear of the vehicle are independently connected to the audio amplifier 42, the inspection sound is generated with a time lag, but the two speakers 43 and 44 on the left front side of the vehicle. Are connected in parallel, and are also connected in parallel with the two speakers 46 and 47 on the right front side of the vehicle, so that the speakers 43 and 44 simultaneously generate inspection sounds, and similarly, 46 and 47 simultaneously detect inspection sounds. Is generated.

  Next, in step S54, the inspector confirms whether or not a sound (inspection sound) is emitted from each direction by hearing of the inspector.

  Next, in step S55, the inspector determines whether it is normal or not based on the audibility and compares it with his or her own audible memory. When the inspection sound is generated properly, the inspector is normal in step S56. When it is determined that there is no inspection sound and the NG is not generated, in step S57, it is recognized that there is an abnormality such as a poor connection state, a non-inserted state of the connector, or a failure of the speaker itself.

  Thus, the conventional vehicle inspection method (speaker inspection method) is an inspection based on the inspector's hearing, and in the case of speakers (speakers 43 and 44, speakers 46 and 47) connected in parallel, Even if one of the speakers is defective, such as disconnection, inspection sound is generated from the remaining speakers, so that the speaker inspection accuracy is low and there is room for improvement.

  By the way, Patent Document 1 discloses an in-vehicle inspection apparatus that inspects a disconnection or a contact failure of a speaker wire harness depending on whether or not the speaker is driven when the in-vehicle speaker is inspected. Is disclosed.

  However, in Patent Document 1, when inspecting a plurality of speakers connected in parallel, even if one of the speakers has a defect such as a poor connection, an inspection sound is output from the other normal speaker connected in parallel. Therefore, there is no disclosure of a technical problem that it is difficult to perform an accurate inspection.

  Further, Patent Document 1 does not disclose that inspection is performed using sounds in different frequency bands corresponding to the characteristics of a plurality of speakers.

JP-A-5-2045

  Accordingly, an object of the present invention is to provide a vehicle inspection method capable of reliably inspecting the quality state of speakers such as the connection state of a plurality of speakers connected in parallel and having different characteristics.

A vehicle inspection method according to the present invention is a vehicle inspection method comprising a plurality of speakers having different characteristics connected in parallel to a vehicle audio head unit, and a vehicle sound collecting microphone. A test sound generating step for generating a sound source in a frequency band corresponding to the characteristics of each speaker from each speaker, and a test sound for collecting the sound generated from each speaker at the time of the test sound generating step by the vehicle sound collecting microphone A sound collection step, a comparison step for comparing the frequency of the inspection sound collected by the inspection sound collection step with a preset frequency of each speaker, and the quality of each speaker based on the result of the comparison step comprising a determining step of determining status, and the plurality of speakers, and the instrument panel and the front door of the vehicle front left, the vehicle right Disposed and the instrument panel and front door, the sound collecting microphone the vehicle is one that has been set to the hands-free microphone installed in the vehicle roof unit.

  The plurality of speakers connected in parallel with each other with different characteristics may be set as a high-frequency speaker such as a tweeter and a low-frequency speaker such as a woofer. As the sound collection microphone, a hands-free microphone or a noise canceller may be employed.

  Moreover, the above-mentioned good / bad state of the speaker means normal or bad connection state with respect to the speaker (disconnection, poor contact), presence / absence of connector insertion to the speaker, and good / no good (failure) of the speaker itself.

  According to the above configuration, in the inspection sound generation step, a sound source of a frequency band corresponding to the characteristics of each speaker is generated from each speaker by the vehicle audio head unit, and in the inspection sound collection step, The sound generated from each speaker is collected by the vehicle sound collection microphone, and in the comparison step, the frequency of the inspection sound collected by the inspection sound collection step is compared with the preset frequency of each speaker, In the determination step, the pass / fail state of each speaker is determined based on the result of the comparison step.

  Here, if the speaker connection is poor, the speaker is broken, or the connector is not inserted into the speaker, the sound collecting microphone does not generate an inspection sound from the speaker. It is impossible to collect the inspection sound.

For a plurality of speakers connected in parallel, a sound source of a frequency band corresponding to each characteristic is generated, so that the frequency band of the inspection sound is different and the frequency band of the inspection sound collected by the sound collecting microphone is different. Also, since the frequency of the collected test sound is compared with the preset frequency of each speaker at the time of comparison in the comparison step, it is easy to determine which of a plurality of speakers connected in parallel due to the difference in frequency. Can be determined.
Therefore, it is possible to reliably check the quality status of a plurality of speakers connected in parallel and having different characteristics.

  In one embodiment of the present invention, the inspection sound generation step generates a sound source having a frequency band and sound pressure corresponding to the characteristics of each speaker, and the comparison step includes an inspection collected by the inspection sound collection step. The frequency and sound pressure of sound are compared with the frequency and sound pressure of each speaker set in advance.

  According to the above configuration, sound source generation, sound collection, comparison, and determination are executed using not only the frequency band according to the characteristics of each speaker but also the sound pressure (sound intensity), so that the accuracy of speaker inspection is improved. In particular, the speaker inspection can be reliably performed even in a noisy environment, and this is also effective when the speaker inspection is performed in a factory where the surroundings are not quiet, such as a vehicle assembly factory.

  In one embodiment of the present invention, the inspection sound generating step sequentially generates sounds generated by the speakers connected in parallel.

  According to the above configuration, since the sound generated from each speaker connected in parallel is sequentially generated, the generated sound is generated one by one without the plurality of speakers generating the sound at the same time. It can be executed reliably.

  In one embodiment of the present invention, the inspection sound generation step simultaneously generates sound generated by the speakers connected in parallel.

  According to the above configuration, the sound generated by the speakers connected in parallel is generated simultaneously, so that the speaker inspection time can be shortened. Note that even if sounds generated by a plurality of speakers connected in parallel are generated simultaneously, a sound source in a frequency band corresponding to the characteristics of each speaker is generated, so there is no problem in comparison and determination.

  In one embodiment of the present invention, the characteristics of the plurality of speakers are set to characteristics having different frequency bands, and the test sound generating step simultaneously generates sound sources whose frequencies do not overlap with each other in different frequency bands. Is.

  According to the above configuration, even when sound sources whose frequencies do not overlap with each other in different frequency bands are generated at the same time, the collected inspection sounds can be separated for each band and accurately compared in the comparison step.

  According to the present invention, there is an effect that the pass / fail state of a plurality of speakers having different characteristics connected in parallel can be reliably inspected.

Block diagram of an audio system used in the vehicle inspection method of the present invention Frequency characteristics diagram showing differences in characteristics of multiple speakers Flow chart showing vehicle inspection method Block diagram of an audio system used in a conventional vehicle inspection method A flowchart showing a conventional vehicle inspection method

For the purpose of surely inspecting the pass / fail state of a plurality of speakers connected in parallel with different characteristics, a plurality of speakers connected in parallel to the audio head unit for vehicles and a sound collecting microphone for vehicles are provided. An inspection method for generating a sound source having a frequency band corresponding to a characteristic of each speaker from each speaker by the vehicle audio head unit, and generation from each speaker during the inspection sound generating step A test sound collecting step for collecting sound by the vehicle sound collecting microphone, and a comparison step for comparing the frequency of the test sound collected by the test sound collecting step with a preset frequency of each speaker When, and a determination step of determining the quality status of each speaker on the basis of the result of the comparison step, the plurality of speakers, the vehicle left front And Nsu Torr instrument panel and front door, is arranged on the instrument panel and the front door of the vehicle right-front, the sound collecting microphone the vehicle is realized by a method that is set to the hands-free microphone installed in the vehicle roof portion .

An embodiment of the present invention will be described in detail with reference to the drawings.
The drawing shows a vehicle inspection method. First, the configuration of an audio system used in the vehicle inspection method will be described with reference to FIG.

  As shown in FIG. 1, the audio system of this embodiment includes a vehicle audio head unit 10, an audio amplifier 11 as an audio frequency amplifier, and a high-frequency speaker such as a tweeter arranged in front of the vehicle. 12, a low-frequency speaker 13 such as a woofer disposed in front of the left of the vehicle, a full range type speaker 14 disposed in the rear of the left of the vehicle, and a tweeter disposed in front of the right of the vehicle. Such as a high-frequency speaker 15, a low-frequency speaker 16 such as a woofer arranged in front of the vehicle, a full-range type speaker 17 arranged in the rear of the vehicle, and a room lamp in the vehicle roof portion. And a vehicle sound collecting microphone 18.

  Here, the above-mentioned high-frequency speakers 12 and 15 are arranged on the instrument panel, and the above-mentioned low-frequency speakers 13 and 16 are arranged on the front door. Reference numeral 17 denotes a rear door or a rear package tray.

The audio head unit 10 includes a ROM 19 for storing a program, a CPU 20 as a central processing unit, frequency (set frequency) data for each speaker 12 to 17 set in advance, and each speaker 12 to set in advance. RAM 21 for storing necessary data such as 17 sound pressure (set sound pressure) data and OK display indicating that the speakers 12 to 17 are normal after the speaker inspection, or NG indicating that the speaker is abnormal after the speaker inspection And a display unit 22 for visually displaying the display.
The above-described abnormalities of the speakers 12 to 17 include a poor connection state (disconnection or contact failure) to the speakers 12 to 17, a state in which no connector is inserted into the speakers 12 to 17, and a failure of the speakers 12 to 17 themselves. including.

  Furthermore, as the above-described vehicle sound collection microphone 18, a hands-free microphone or a noise canceller can be used. When a hands-free microphone is used, an existing microphone (hands-free microphone) is used as the vehicle sound collection microphone. 18 can be used effectively, and it is not necessary to separately provide a sound collecting microphone.

  The audio head unit 10 and the audio amplifier 11 are connected by a line L1 (line is an abbreviation of an electric signal line), and the audio amplifier 11 and the rear left and right speakers 14 and 17 are respectively connected to independent lines L2, L2. The two speakers 12 and 13 on the left front side of the vehicle are connected in parallel to the audio amplifier 11 using lines L4 and L5. Similarly, the two speakers 15 and 16 on the right front side of the vehicle are also connected to the line L6. L7 are connected in parallel to the audio amplifier 11, and the vehicle sound collecting microphone 18 is connected to the audio head unit 10 via a line L8.

  The treble speakers 12 and 15 (tweeter) shown in FIG. 1 have the frequency characteristic A of the treble range shown in FIG. 2, and the bass speakers 13 and 16 (woofer) shown in FIG. 1 are shown in FIG. The full-range type speakers 14 and 17 shown in FIG. 1 have the frequency characteristic C of the entire band shown in FIG.

  When the audio head unit 10 is set to the speaker inspection mode (see step S1 in FIG. 3), the audio head unit 10 has the characteristics A, B, C (from the speakers 12 to 17 to the speakers A to B). A command function (see step S2) for issuing a command to the audio amplifier 11 to generate a sound source having a frequency band and sound pressure according to FIG. 2) and an inspection sound for generating the sound source from the audio amplifier 11 in response to the command The generation function (see step S3), the frequency and sound pressure of the inspection sound collected by the vehicle sound collection microphone 18, and the preset frequency (set frequency) and sound pressure (set sound) of each speaker 12-17. Pressure) and the connection state of the speakers 12 to 17 and / or the speaker based on the comparison result. Determination function for determining the quality condition of a speaker, such as the presence or absence of a failure of 2 to 17 (see step S6), and has a.

Next, a vehicle inspection method (speaker inspection method) will be described with reference to the flowchart shown in FIG.
In this embodiment, the vehicle inspection method is based on the state of connection of each speaker 12-17 and the failure of each speaker 12-17 itself at the time of completion inspection of the assembly line of the vehicle equipped with the audio system shown in FIG. The presence or absence is inspected.

In the mode setting step S1 of the flowchart shown in FIG. 3, the audio head unit 10 is set to the speaker inspection mode.
Next, in command step S2, the audio head unit 10 sends the sound source of the frequency band and sound pressure corresponding to the characteristics A, B, C of the speakers 12-17 from the speakers 12-17 to the audio amplifier 11. Give a command to generate.

  Next, in the test sound generation step S3, the audio amplifier 11 receives the above-described command and generates a sound source having a frequency band and sound pressure corresponding to the characteristics A, B, and C of each speaker 12-17 from each speaker 12-17. To do. This inspection sound generation step S3 has the following two methods (a) and (b).

Method b)
In the method a), the treble speaker 12 is driven at the frequency c in FIG. 2, for example, 1000 to 2000 Hz and a predetermined sound pressure, and the bass speaker 13 is then driven to the frequency a in FIG. Next, the full-range type speaker 14 is driven with the frequency b in FIG. 2, for example, 100 to 200 Hz (excluding the crossover frequency) and a predetermined sound pressure. The speaker 17 is driven at a frequency b in FIG. 2, for example, 100 to 200 Hz (excluding the crossover frequency) and a predetermined sound pressure, and then the bass speaker 16 is driven at a frequency a in FIG. 2, for example, 50 to 80 Hz. Then, the high sound speaker 15 is driven at the frequency c in FIG. 2, for example, 1000 to 2000 Hz and the predetermined sound pressure. Note that the driving order of the speakers is not limited to the order of 12, 13, 14, 17, 16, and 15.
That is, the method (a) is to sequentially generate sounds generated by the speakers 12 and 13 or the speakers 15 and 16 connected in parallel.

B) Method
In the method (b), the left speakers 12, 13, and 14 are simultaneously driven with the frequencies c, a, and b and the sound pressures corresponding to the speakers 12, 13, and 14, and then the right speakers 15, 16 are driven. , 17 are simultaneously driven at frequencies c, a, b and sound pressures corresponding to the speakers 15, 16, 17 respectively.

Here, the high-frequency speakers 12 and 15 are driven at a frequency of 1000 to 2000 Hz, for example, the low-frequency speakers 13 and 16 are driven at a frequency of 50 to 80 Hz, for example, and the full-range type speakers 14 and 17 are For example, driving is performed at a frequency of 100 to 200 Hz (excluding the crossover frequency), and sound sources whose frequencies do not overlap each other are generated simultaneously.
That is, the method (b) is to simultaneously generate sounds generated by the speakers 12 and 13 or the speakers 15 and 16 connected in parallel.

  Next, in the inspection sound collecting step S4, sounds generated from the speakers 12 to 17 in the inspection sound generating step S3 are collected by the vehicle sound collecting microphone 18 connected to the audio head unit 10, and this sound is collected. The sound collecting microphone 18 converts acoustic energy into electric energy and sends it to the audio head unit 10.

  Next, in the comparison step S5, the audio head unit 10 determines the frequency and sound pressure of the test sounds of the speakers 12 to 17 collected in the test sound collection step S4 and the preset frequencies of the speakers 12 to 17. (Set frequency) and sound pressure (set sound pressure) are compared.

  The set frequency and set sound pressure for each of the speakers 12 to 17 are stored in a predetermined area of the RAM 21 so as to be read out. In the method b) described above, even when the sounds generated by the speakers 12 and 13 or the speakers 15 and 16 connected in parallel in step S3 are simultaneously generated, the high-frequency speakers 12 and 15 and the low-frequency speakers 13 and 16 are generated. Then, since the inspection sound has completely different frequencies such as 1000 to 2000 Hz and 50 to 80 Hz, for example, it can be accurately compared.

Next, in the determination step S6, the audio head unit 10 automatically determines the quality state of the speakers such as the connection state of the speakers 12 to 17 and the presence or absence of failure of the speakers 12 to 17 based on the result of the comparison step S5. In the case of YES determination that all the speakers 12 to 17 are normally outputting the inspection sound properly, it is determined that at least one of the speakers is abnormal while moving to the next normal display step S7. When NO is determined, the process proceeds to another abnormality display step S8.
In the normal display step S7 described above, the audio head unit 10 drives the display unit 22 to display on the display unit 22 that the audio system is normal.

  On the other hand, in the above-described abnormality display step S <b> 8, the audio head unit 10 drives the display unit 22 to display on the display unit 22 which speaker is not normal.

  As described above, the vehicle inspection method of the above-described embodiment has a plurality of speakers (high-frequency speakers 12 and low-frequency speakers 13 or high-frequency speakers 15 and low-frequency sounds) connected in parallel to the vehicle audio head unit 10 and having different characteristics. A vehicle sound collecting microphone 18, and the vehicle audio head unit 10 from the speakers 12, 13, 15, 16 to the speakers 12, 13, 15, 16. Test sound generation step S3 for generating a sound source in a frequency band corresponding to the characteristics A and B of the sound, and the sound generated from each speaker 12, 13, 15, 16 at the time of the test sound generation step S3 Inspection sound collection step S4 to be collected by the microphone 18, the frequency of the inspection sound collected by the inspection sound collection step S4, and each preset speed The comparison step S5 for comparing the frequencies (set frequencies) of the power sources 12, 13, 15, 16 and the determination step S6 for determining the pass / fail state of each speaker 12, 13, 15, 16 based on the result of the comparison step S5. (See FIGS. 1 to 3).

  According to this configuration, in the inspection sound generation step S3, the audio head unit 10 for a vehicle has a frequency band corresponding to the characteristics A and B of the speakers 12, 13, 15, and 16 from the speakers 12, 13, 15, and 16. A sound source is generated, and the sound generated from each speaker 12, 13, 15, 16 in the inspection sound generation step S3 is collected by the vehicle sound collection microphone 18 in the inspection sound collection step S4, and in the comparison step S5. The frequency of the inspection sound collected in the inspection sound collection step S4 is compared with the preset frequencies of the speakers 12, 13, 15, and 16, and the result of the comparison step S5 is obtained in the determination step S6. Based on this, the pass / fail state of each speaker 12, 13, 15, 16 is determined.

  Here, when the connection state of the speakers 12, 13, 15, and 16 is poor, when the speakers 12, 13, 15, and 16 are out of order, or when the connector is inserted into the speakers 12, 13, 15, and 16. If not, no inspection sound is generated from the speakers 12, 13, 15, 16, and the inspection sound cannot be collected by the sound collection microphone 18.

For a plurality of speakers connected in parallel, a sound source of a frequency band corresponding to each characteristic is generated, so that the frequency band of the inspection sound is different and the frequency band of the inspection sound collected by the sound collecting microphone is different. Also, since the frequency of the collected test sound is compared with the preset frequency of each speaker at the time of comparison in the comparison step, it is easy to determine which of a plurality of speakers connected in parallel due to the difference in frequency. Can be determined.
Therefore, it is possible to reliably inspect the quality state of a plurality of speakers (high-frequency speakers 12 and low-frequency speakers 13 or high-frequency speakers 15 and low-frequency speakers 16) connected in parallel.

  In one embodiment of the present invention, the inspection sound generation step S3 generates a sound source having a frequency band and sound pressure corresponding to the characteristics A and B of the speakers 12, 13, 15, and 16, and the comparison step S5 includes The frequency and sound pressure of the inspection sound collected in the inspection sound collection step S4 are compared with the preset frequency (set frequency) and sound pressure (set sound pressure) of each speaker (FIG. 3).

  According to this configuration, sound source generation, sound collection, comparison, and determination are executed using not only the frequency bands corresponding to the characteristics A and B of the speakers 12, 13, 15, and 16 but also the sound pressure. The inspection accuracy can be improved, and the speaker inspection can be performed reliably even in a noisy environment, which is also effective when the speaker inspection is performed in a factory where the surroundings are not quiet like a vehicle assembly factory. .

  In one embodiment of the present invention, the inspection sound generating step S3 sequentially generates sound generated by the speakers (speakers 12, 13 or speakers 15, 16) connected in parallel (see FIG. 3).

  According to this configuration, since the sound generated by each speaker (speakers 12 and 13 or speakers 15 and 16) connected in parallel is sequentially generated, a plurality of speakers (speakers 12 and 13 or speakers 15 and 16) are provided. Since the generated sound is emitted one by one without generating the generated sound at the same time, the speaker inspection can be performed more reliably.

  In one embodiment of the present invention, the inspection sound generation step S3 is to simultaneously generate sounds generated by the speakers 12 and 13 or the speakers 15 and 16 connected in parallel (see FIG. 3).

  According to this configuration, since the sounds generated by the speakers 12, 13, 15, and 16 connected in parallel are simultaneously generated, the speaker inspection time can be shortened. In order to generate a sound source in a frequency band corresponding to the characteristics of each speaker 12, 13, 15, 16 even if the sounds generated by a plurality of speakers 12 and 13 or speakers 15 and 16 connected in parallel are generated simultaneously. There is no problem in comparison and determination.

  In one embodiment of the present invention, the characteristics A and B of the plurality of speakers 12, 13, 15, and 16 are set to characteristics having different frequency bands, and the inspection sound generation step S 3 includes different frequency bands. In FIG. 2, sound sources whose frequencies do not overlap with each other (for example, the high sound speakers 12 and 15 are 1000 to 2000 Hz and the low sound speakers 13 and 16 are 50 to 80 Hz sound sources) are generated simultaneously (see FIGS. 2 and 3).

  According to this configuration, even when sound sources whose frequencies do not overlap with each other in different frequency bands are generated at the same time, the collected inspection sounds can be separated for each band and accurately compared in the comparison step S5. Thereby, both shortening of the speaker inspection time and optimization of the speaker inspection can be achieved.

  As disclosed in the embodiment, when a hands-free microphone is used as the vehicle sound collecting microphone 18, an existing microphone (hands-free microphone) can be effectively used as the vehicle sound collecting microphone 18. There is no need to provide a separate microphone.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The plurality of speakers connected in parallel according to the present invention correspond to the high-frequency speaker 12 and the low-frequency speaker 13 or the high-frequency speaker 15 and the low-frequency speaker 16 of the embodiment.
The present invention is not limited to the configuration of the above-described embodiment.

For example, as a plurality of speakers having different characteristics connected in parallel, instead of a combination of a tweeter (high-frequency speaker) and a woofer (low-frequency speaker), a tweeter (high-frequency speaker), a woofer (low-frequency speaker), a squawker Among the full-range type speakers (medium sound speakers), a plurality of speakers having different characteristics may be connected in parallel to the audio head unit 10 or the audio amplifier 11.
Further, the frequencies 50 to 80 Hz, 100 to 200 Hz, and 1000 to 2000 Hz disclosed in the above embodiment are merely examples, and the present invention is not limited thereto.

  As described above, the present invention is useful for a vehicle inspection method including a plurality of speakers having different characteristics connected in parallel to a vehicle audio head unit and a vehicle sound collection microphone.

DESCRIPTION OF SYMBOLS 10 ... Audio head unit for vehicles 12, 15 ... Speaker for high sound (speaker)
13, 16 ... Low-frequency speakers (speakers)
18 ... Vehicle sound collection microphone S3 ... Inspection sound generation step S4 ... Inspection sound collection step S5 ... Comparison step S6 ... Determination step

Claims (5)

A plurality of speakers having different characteristics connected in parallel to the vehicle audio head unit;
A vehicle inspection method comprising a vehicle sound collection microphone,
An inspection sound generating step for generating a sound source in a frequency band according to the characteristics of each speaker from each speaker by the vehicle audio head unit;
Inspection sound collection step for collecting sound generated from each speaker at the time of the inspection sound generation step with the vehicle sound collection microphone;
A comparison step of comparing the frequency of the inspection sound collected by the inspection sound collection step with a preset frequency of each speaker;
A determination step of determining a pass / fail state of each speaker based on the result of the comparison step ,
The plurality of speakers are arranged on the instrument panel and front door on the left front side of the vehicle, and on the instrument panel and front door on the right side of the vehicle,
The vehicle inspection method , wherein the vehicle sound collection microphone is set to a hands-free microphone provided in a vehicle roof portion . The inspection sound generation step generates a sound source having a frequency band and sound pressure according to the characteristics of each speaker,
The vehicle inspection method according to claim 1, wherein the comparison step compares the frequency and sound pressure of the inspection sound collected by the inspection sound collection step with a preset frequency and sound pressure of each speaker. The vehicle inspection method according to claim 1, wherein the inspection sound generation step sequentially generates sound generated by the speakers connected in parallel. The vehicle inspection method according to claim 1, wherein the inspection sound generation step simultaneously generates sounds generated by the speakers connected in parallel. The characteristics of the plurality of speakers are set to characteristics with different frequency bands,
5. The vehicle inspection method according to claim 4, wherein the inspection sound generation step simultaneously generates sound sources whose frequencies do not overlap with each other in different frequency bands.

Images