CN210183548U - Needle bed formula microphone PCBA test fixture - Google Patents
Needle bed formula microphone PCBA test fixture Download PDFInfo
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- CN210183548U CN210183548U CN201921537089.XU CN201921537089U CN210183548U CN 210183548 U CN210183548 U CN 210183548U CN 201921537089 U CN201921537089 U CN 201921537089U CN 210183548 U CN210183548 U CN 210183548U
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Abstract
The utility model discloses a needle bed type microphone PCBA test tool, which comprises a machine base and a fixed vertical frame; the top end face of the base is provided with a PCBA fixed tray, a broadcasting mechanism, a control detection system and a power supply are arranged in the base, a controlled end of the broadcasting mechanism is connected to an output end of the control detection system, a display mechanism is arranged on the base, and a controlled end of the display mechanism is connected to an output end of the control detection system; the fixed vertical frame is provided with a lifting mechanism and a needle bed connected with the lifting mechanism, and the needle bed is provided with a plurality of detection probes contacted with a welding disc of the microphone PCBA. The utility model discloses can detect out the normal trouble piece of range estimation, can detect the sensitivity of microphone PCBA output, and then differentiate microphone PCBA's working property through sensitivity, easy operation, test are swift to when having got rid of the hidden danger the process stage that the analysis goes out the problem and appears.
Description
Technical Field
The utility model relates to an on-vehicle microphone technical field, especially a needle bed formula microphone PCBA test fixture.
Background
In recent years, with the increasing popularization of the automobile industry, the vehicle-mounted microphone is more popular, the trouble of answering the call by hands when a driver drives a vehicle is avoided, and meanwhile, the vehicle-mounted microphone enables the driver to enjoy the smoothness of stereo music.
The existing incoming material detection of the microphone PCBA cannot confirm the process stage of the fault part due to lack of detection equipment, and no equipment capable of directly detecting the microphone PCBA exists in the market. The existing detection means generally adopt visual appearance or PCBA is divided into boards and then the boards are tested by an anechoic chamber after being welded.
Of the above two detection means, the first one can only detect whether the device is damaged or not, and cannot detect the performance parameters of the PCBA in actual operation. The second method is to use the anechoic chamber to detect the time and the labor consumption, the cost is high, the timeliness cannot meet the requirement of full detection, and then the detection is carried out after the PCBA is welded, and even if the detection problem cannot be distinguished, the problem is generated when the PCBA supplies or the PCBA and the welding process are carried out.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve provides a needle bed formula microphone PCBA test fixture to solve current microphone PCBA's supplied materials and detect the problem that can't confirm that the fault piece appears in which process stage, with the effective detection of realization on-vehicle microphone performance, easy operation, test are swift.
In order to solve the technical problem, the utility model adopts the following technical proposal.
A needle bed type microphone PCBA test tool comprises a box-shaped base and a fixed vertical frame vertically and fixedly arranged on the top end face of the base; the testing device comprises a base, a sound box, a control detection system and a power supply, wherein a PCBA fixed tray used for positioning a microphone PCBA is arranged on the top end face of the base, a sound broadcasting mechanism used for transmitting sound to the microphone PCBA to test the performance of the microphone PCBA, the control detection system used for controlling the overall operation of the device and detecting the sensitivity of the microphone PCBA and the power supply used for supplying power to the overall device are arranged in the base, a controlled end of the sound broadcasting mechanism is connected to the output end of the control detection system, a display mechanism used for displaying the testing result of the control detection system and giving out an audible and visual alarm prompt when the testing is abnormal is arranged on the base, and a controlled end of the display mechanism is connected to the output end of the; the fixed vertical frame is provided with a lifting mechanism and a needle bed which is connected with the lifting mechanism and is positioned right above the PCBA fixed tray and used for being matched with the PCBA fixed tray under the driving of the lifting mechanism to clamp and position the PCBA of the microphone, a plurality of detection probes which are in contact with pads of the PCBA of the microphone and used for transmitting signals are arranged on the needle bed, the controlled end of the lifting mechanism is connected to the output end of the control detection system, and the signal output end of each detection probe is connected to the input end of the control detection system.
According to the technical scheme, the control detection system comprises an AD acquisition circuit used for acquiring audio signals of each detection probe and carrying out amplification and filtering processing, and a signal output end of the AD acquisition circuit is connected with a mainboard single chip microcomputer circuit which is used for carrying out Fourier transform on signals transmitted by the AD acquisition circuit, converting time domain signals into frequency domain signals, and analyzing whether harmonic components are contained or not and whether the harmonic components exceed the standard or not so as to judge the sensitivity.
According to the technical scheme, the sound playing mechanism comprises a sound insulation cavity arranged in the base, a full-channel loudspeaker arranged in the sound insulation cavity and a sound production control circuit arranged in the sound insulation cavity and used for controlling sound production actions of the full-channel loudspeaker, wherein a controlled end of the full-channel loudspeaker is connected to an output end of the sound production control circuit, and a controlled end of the sound production control circuit is connected to an output end of the mainboard single chip circuit; and the PCBA fixed tray is provided with a sound transmission hole communicated with the sound insulation cavity.
Further optimize technical scheme, the sound production control circuit is including being used for exporting sinusoidal wave generating circuit and power amplifier circuit, and sinusoidal wave generating circuit's controlled end is connected in mainboard single chip microcomputer circuit's output, and sinusoidal wave generating circuit's output is connected in power amplifier circuit's input, and the controlled end of full channel speaker is connected in power amplifier circuit's output.
According to the technical scheme, the lifting mechanism comprises an air cylinder, wherein the fixed end of the air cylinder is fixedly arranged on the fixed vertical frame, the end of the piston rod is fixed with the needle bed, an electromagnetic valve used for controlling the on-off of an air inlet pipeline is arranged on the air inlet pipeline of the air cylinder, and the controlled end of the electromagnetic valve is connected to the output end of the mainboard single chip microcomputer circuit.
According to the technical scheme, the needle bed comprises a bottom plate used for positioning the detection probe, a fixing plate fixed with the end of the piston rod of the air cylinder and a connecting rod connected and arranged between the bottom plate and the fixing plate, and the detection probe is fixedly arranged on the bottom plate.
Further optimize technical scheme, display mechanism is including being used for carrying out the LCD screen that shows the result that detects, a bee calling organ for sending buzzing warning suggestion when a microphone PCBA test is unusual, a bee calling organ control circuit for controlling the bee calling organ action, an indicator lamp control circuit for sending the double-colored pilot lamp of light suggestion and being used for controlling double-colored pilot lamp action when a microphone PCBA test is unusual, the output of mainboard single chip circuit is connected in the input of LCD screen, the controlled end of bee calling organ control circuit and indicator lamp control circuit is connected respectively in the output of mainboard single chip circuit, the controlled end of bee calling organ is connected in bee calling organ control circuit's output, the controlled end of double-colored pilot lamp is connected in the output of indicator lamp control circuit.
Due to the adoption of the technical scheme, the utility model has the following technical progress.
The utility model discloses can detect out the normal trouble piece of range estimation, can detect the sensitivity of microphone PCBA output, and then differentiate microphone PCBA's working property through sensitivity, easy operation, test are swift, and the utility model discloses relative anechoic chamber simple structure, with low costs, occupation space are little, only need several seconds can test the test of accomplishing a microphone PCBA (30 microphone platelet) to reach the detection speed that the ground has improved the quality, and the process phase that the analysis has appeared when having got rid of the hidden danger.
The utility model discloses broadcasting mechanism at the inside setting of frame can spread into sound into to microphone PCBA, and then the microphone PCBA of being convenient for carries out performance test, and through mainboard single chip microcomputer circuit control sound production control circuit, controls full channel speaker sound emission again, and is very convenient.
The utility model discloses a lifting gearing can control the lift of needle bed conveniently, and can control the action of cylinder through opening and close of control solenoid valve, and then controls the lift action of needle bed.
The utility model discloses the LCD screen among the display mechanism can show the test result for the staff can observe the test result very directly perceivedly, and when the test takes place unusually, can send audible and visual warning, and the microphone PCBA of this test stage of the suggestion staff of being convenient for takes place unusually.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the present invention;
fig. 3 is a side view of the present invention;
FIG. 4 is a schematic block diagram of the present invention;
fig. 5 is a circuit diagram of the motherboard single chip circuit of the present invention;
fig. 6 is a circuit diagram of the indicating lamp control circuit of the present invention;
fig. 7 is a circuit diagram of the buzzer control circuit of the present invention;
fig. 8 is a circuit diagram of the sine wave generating circuit according to the present invention;
fig. 9 is a circuit diagram of the power amplifier circuit of the present invention.
Wherein: 1. the device comprises a cylinder, 2, an electromagnetic valve, 3, a detection probe, 4, a PCBA fixed tray, 5, a liquid crystal screen, 6, a double-color indicator lamp, 7, a mainboard single chip microcomputer circuit, 8, a sound insulation cavity, 9, a buzzer, 10, a needle bed, 11, a machine base, 12 and a fixed vertical frame.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A PCBA test tool for a neilsbed microphone is shown in figures 1 to 9 and comprises a base 11, a fixed vertical frame 12, a PCBA fixed tray 4, a broadcasting mechanism, a control detection system, a display mechanism, a lifting mechanism, a power supply, a neilsbed 10 and a detection probe 3.
The base 11 is box-shaped, and the fixed vertical frame 12 is vertically and fixedly arranged on the top end surface of the base 11.
The PCBA fixed tray 4 is arranged on the top end face of the base 11, and the PCBA fixed tray 4 is connected with the base 11 through a positioning screw. Be provided with a plurality of reference columns on the fixed tray 4 of PCBA for fix a position microphone PCBA.
The control detection system is used for controlling the overall operation of the device and detecting the sensitivity of the microphone PCBA, and comprises an AD acquisition circuit for acquiring audio signals of the detection probes 3 and performing amplification and filtering processing. The signal output end of the AD acquisition circuit is connected with a mainboard single chip microcomputer circuit 7, and the mainboard single chip microcomputer circuit 7 is used for carrying out Fourier transform on signals transmitted by the AD acquisition circuit, converting time domain signals into frequency domain signals and analyzing whether harmonic components are contained or not and whether the harmonic components exceed the standard or not so as to judge the sensitivity.
The lifting mechanism is arranged on the fixed vertical frame 12, and the controlled end of the lifting mechanism is connected with the output end of the control detection system. The lifting mechanism comprises a cylinder 1, the fixed end of the cylinder 1 is fixedly arranged on a fixed vertical frame 12, the piston rod end of the cylinder 1 is fixed with a needle bed 10, an electromagnetic valve 2 is arranged on an air inlet pipeline of the cylinder 1, the electromagnetic valve 2 is used for controlling the on-off of the air inlet pipeline, and the controlled end of the electromagnetic valve 2 is connected to the output end of the mainboard single chip microcomputer circuit. In addition, the lifting mechanism further comprises a solenoid valve control switch for controlling the operation of the solenoid valve 2.
The needle bed 10 is connected with the lifting mechanism, is positioned right above the PCBA fixed tray 4, and is used for being matched with the PCBA fixed tray 4 to clamp and position the PCBA of the microphone under the driving of the lifting mechanism. A plurality of detection probes 3 which are contacted with the pads of the microphone PCBA are arranged on the needle bed 10, the detection probes 3 are used for transmitting signals, and the signal output ends of the detection probes 3 are connected with the input end of a control detection system.
The needle bed 10 comprises a bottom plate for positioning the detection probe 3, a fixing plate fixed with the end of the piston rod of the cylinder 1 and a connecting rod connected and arranged between the bottom plate and the fixing plate, and the detection probe 3 is fixedly arranged on the bottom plate.
The power supply is arranged inside the base 11 and is used for supplying electric energy to the whole device.
The broadcast mechanism is arranged in the base 11 and used for transmitting sound to the microphone PCBA so as to test the performance of the microphone PCBA, and the controlled end of the broadcast mechanism is connected to the output end of the control detection system. The broadcasting mechanism comprises a sound insulation cavity 8, a full-channel loudspeaker and a sounding control circuit.
The sound insulation chamber 8 is arranged in the base 11, sound transmission holes communicated with the sound insulation chamber 8 are formed in the PCBA fixed tray 4, and specifically, the sound transmission holes are arranged in positions, corresponding to the PCBA of the microphone, of the PCBA fixed tray 4 and used for picking up sound emitted by a full-channel loudspeaker placed below the PCBA.
Full channel speaker sets up inside 8 in the chamber that gives sound insulation, and full channel speaker's controlled end is connected in sound production control circuit's output. The sounding control circuit is arranged in the sound insulation cavity 8 and used for controlling the sounding action of the full-channel loudspeaker, and the controlled end of the sounding control circuit is connected with the output end of the mainboard single chip microcomputer circuit. The sound production control circuit comprises a sine wave generating circuit and a power amplifier circuit, the sine wave generating circuit is used for outputting sine waves, the controlled end of the sine wave generating circuit is connected to the output end of the mainboard single chip microcomputer circuit, the output end of the sine wave generating circuit is connected to the input end of the power amplifier circuit, and the controlled end of the full-channel loudspeaker is connected to the output end of the power amplifier circuit.
The display mechanism is arranged on the base 11 and used for displaying the test result of the control detection system and giving out sound-light alarm prompt when the test is abnormal, and the controlled end of the display mechanism is connected with the output end of the control detection system. The display mechanism comprises a liquid crystal screen 5, a buzzer 9, a buzzer control circuit, a two-color indicator lamp 6 and an indicator lamp control circuit.
The liquid crystal screen 5 is used for displaying the detected result, and the output end of the mainboard single chip microcomputer circuit is connected with the input end of the liquid crystal screen 5. The buzzer 9 is used for giving out a buzzing alarm prompt when a microphone PCBA test is abnormal, and the controlled end of the buzzer 9 is connected with the output end of the buzzer control circuit. The buzzer control circuit is used for controlling the buzzer 9 to act, and the controlled end of the buzzer control circuit is connected with the output end of the mainboard single chip microcomputer circuit. The double-color indicator lamp 6 is used for giving out a bright prompt when a microphone PCBA test is abnormal, and the controlled end of the double-color indicator lamp 6 is connected to the output end of the indicator lamp control circuit. The indicating lamp control circuit is used for controlling the action of the double-color indicating lamp 6, and the controlled end of the indicating lamp control circuit is connected with the output end of the mainboard single chip microcomputer circuit.
The utility model discloses an assembly process as follows.
First step, process according to the electrical wood material of drawing the utility model discloses a frock structure to the equipment is carried out.
And secondly, attaching sound-absorbing cotton with the thickness of 10.0mm to the inner wall of the sound-insulating cavity 8, and fixing the full-band loudspeaker 13 at the bottom of the sound-insulating cavity 8.
And thirdly, leading wires from the detection probes 3 of the needle bed 10 to a mainboard single chip microcomputer circuit.
And fourthly, fixing a power line for connecting the mainboard singlechip circuit, a connecting line of the mainboard singlechip circuit and the detection probe 3, a liquid crystal screen line and the like in the base 11.
And fifthly, switching on the power supply to start testing.
The utility model discloses an actual test process as follows.
First, the microphone PCBA is positioned on the PCBA fixed tray 4.
Then, pressing down an electromagnetic valve control switch, opening an electromagnetic valve 2, controlling the extension of a piston rod of the cylinder 1 by the electromagnetic valve 2, and further driving the needle bed 10 to press down, so that the detection probe 3 is firmly contacted with an output pad corresponding to the microphone PCBA, the microphone PCBA is provided with a plurality of microphone small plates, and signals of the microphone small plates on the microphone PCBA are collected.
Then, the mainboard single chip microcomputer circuit detects the power supply line voltage of the microphone PCBA, and when a voltage signal is detected, namely the needle bed 10 is detected to be put down.
The principle that the mainboard single chip microcomputer circuit detects the power supply line voltage of the microphone PCBA is as follows: the power-on of the mainboard single chip microcomputer circuit always carries out AD conversion to detect the voltage of the PCBA of the microphone, but the voltage value is basically 0 at this time, and therefore the detection is always carried out circularly. The result of the AD conversion when the needle bed 10 is laid down has a voltage value because the voltage value is substantially fixed, and the judgment as to whether the needle bed 10 is laid down is made by comparing the voltage value AD converted at this time with the voltage value known when the needle bed 10 is not laid down.
The mainboard singlechip circuit begins to set up sinusoidal generating circuit output 1KHZ sine wave, and the sine wave output is exported for full channel speaker sound production through power amplifier circuit. The sound emitted by the full-channel loudspeaker is transmitted to the silicon microphone of the microphone PCBA through the sound insulation cavity 8 and the sound transmission hole, and the microphone PCBA converts the sound signal into an audio signal to be output. The mainboard single chip microcomputer circuit starts signals output by each microphone of the AD acquisition circuit through the detection probe 3, interference data are discarded through filtering processing, Fourier transform is carried out in the mainboard single chip microcomputer circuit to convert signals of a time domain into signals of a frequency domain, whether harmonic components are contained or not and whether the harmonic components exceed the standard or not is analyzed, meanwhile, sensitivity judgment is carried out on amplitude data of 1KHZ, and parameters meeting output indexes are normal.
The sensitivity judgment method comprises the steps of converting amplitude data of each frequency point generated after Fourier transform to obtain sensitivity data, and then comparing the sensitivity data with the upper limit and the lower limit of the error range of the specified sensitivity to judge whether the sensitivity data is qualified.
After the test is finished, the mainboard singlechip circuit controls the liquid crystal screen 5 to display a character of 'test finished'; when the test is unusual, mainboard single chip microcomputer circuit control LCD screen 5 shows the microphone platelet number that corresponds, and microphone PCBA sends out the signal to pilot lamp control circuit and controls double-colored pilot lamp 6 and send the light suggestion simultaneously, and microphone PCBA sends out the signal to buzzer control circuit and controls buzzer 9 and send warning buzzing, and then the microphone platelet that the suggestion staff this position breaks down, and it is very convenient to seek the trouble. After the test is completed, the test of the microphone platelet on the next microphone PCBA is started after a delay.
Claims (7)
1. The utility model provides a needle bed formula microphone PCBA test fixture which characterized in that: comprises a box-shaped base (11) and a fixed vertical frame (12) vertically and fixedly arranged on the top end surface of the base (11); the testing device comprises a base (11), wherein a PCBA fixing tray (4) used for positioning a microphone PCBA is arranged on the top end face of the base (11), a broadcasting mechanism used for transmitting sound to the microphone PCBA to test the performance of the microphone PCBA, a control detection system used for controlling the overall operation of the device and detecting the sensitivity of the microphone PCBA and a power supply used for supplying power to the device as a whole are arranged in the base (11), a controlled end of the broadcasting mechanism is connected to the output end of the control detection system, a display mechanism used for displaying the testing result of the control detection system and giving out an audible and visual alarm prompt when the testing is abnormal is arranged on the base (11), and a controlled end of the display mechanism is connected to the output end of the control detection system; be provided with elevating system on fixed vertical frame (12) and be connected and be located PCBA fixed tray (4) directly over and be used for carrying out the needle bed (10) that the centre gripping was fixed with microphone PCBA with PCBA fixed tray (4) cooperate under the elevating system drive, be provided with a plurality of detection probe (3) that contact with microphone PCBA's pad and be used for transmission signal on needle bed (10), elevating system's controlled end is connected in control detecting system's output, the signal output part of detection probe (3) connects in control detecting system's input.
2. The neilsbed microphone PCBA test tool according to claim 1, characterized in that: the control detection system comprises an AD acquisition circuit used for acquiring audio signals of each detection probe (3) and carrying out amplification and filtering processing, wherein the signal output end of the AD acquisition circuit is connected with a mainboard single chip microcomputer circuit (7) which is used for carrying out Fourier transform on signals transmitted by the AD acquisition circuit, converting time domain signals into frequency domain signals, and analyzing whether harmonic components are contained and whether the harmonic components exceed the standard or not so as to judge the sensitivity.
3. The neilsbed microphone PCBA test tool according to claim 2, characterized in that: the broadcasting mechanism comprises a sound insulation cavity (8) arranged in the base (11), a full-channel loudspeaker arranged in the sound insulation cavity (8) and a sounding control circuit arranged in the sound insulation cavity (8) and used for controlling the sounding action of the full-channel loudspeaker, the controlled end of the full-channel loudspeaker is connected with the output end of the sounding control circuit, and the controlled end of the sounding control circuit is connected with the output end of the mainboard single chip circuit (7); and the PCBA fixed tray (4) is provided with sound transmission holes communicated with the sound insulation cavity (8).
4. The neilsbed microphone PCBA test tool according to claim 3, wherein: the sound production control circuit comprises a sine wave generating circuit and a power amplifier circuit, wherein the sine wave generating circuit is used for outputting sine waves, the controlled end of the sine wave generating circuit is connected to the output end of the mainboard single chip microcomputer circuit (7), the output end of the sine wave generating circuit is connected to the input end of the power amplifier circuit, and the controlled end of the full-channel loudspeaker is connected to the output end of the power amplifier circuit.
5. The neilsbed microphone PCBA test tool according to claim 2, characterized in that: the lifting mechanism comprises a cylinder (1) with a fixed end fixedly arranged on a fixed vertical frame (12) and a piston rod end fixed with the needle bed (10), an electromagnetic valve (2) used for controlling the on-off of an air inlet pipeline is arranged on the air inlet pipeline of the cylinder (1), and the controlled end of the electromagnetic valve (2) is connected to the output end of the main board single chip microcomputer circuit (7).
6. The PCBA testing tool for the neilsbed microphone according to claim 5, wherein the PCBA testing tool comprises: the needle bed (10) comprises a bottom plate for positioning the detection probe (3), a fixing plate fixed with the end of the piston rod of the air cylinder (1) and a connecting rod connected and arranged between the bottom plate and the fixing plate, and the detection probe (3) is fixedly arranged on the bottom plate.
7. The neilsbed microphone PCBA test tool according to claim 2, characterized in that: the display mechanism is including being used for carrying out LCD screen (5) that shows the result that detects, be used for sending buzzer warning suggestion bee calling organ (9) when a microphone PCBA test is unusual, a buzzer control circuit for controlling buzzer (9) action, a double-colored pilot lamp (6) that is used for sending the light suggestion when a microphone PCBA test is unusual and be used for controlling the pilot lamp control circuit of double-colored pilot lamp (6) action, the input in LCD screen (5) is connected to the output of mainboard singlechip circuit (7), the controlled end of buzzer control circuit and pilot lamp control circuit is connected respectively in the output of mainboard singlechip circuit (7), the controlled end of buzzer (9) is connected in the output of buzzer control circuit, the controlled end of double-colored pilot lamp (6) is connected in the output of pilot lamp control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921537089.XU CN210183548U (en) | 2019-09-17 | 2019-09-17 | Needle bed formula microphone PCBA test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921537089.XU CN210183548U (en) | 2019-09-17 | 2019-09-17 | Needle bed formula microphone PCBA test fixture |
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| CN210183548U true CN210183548U (en) | 2020-03-24 |
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| CN201921537089.XU Active CN210183548U (en) | 2019-09-17 | 2019-09-17 | Needle bed formula microphone PCBA test fixture |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112261567A (en) * | 2020-10-20 | 2021-01-22 | 昆山振顺电子科技有限公司 | Microphone circuit board sound testing device and testing method thereof |
| CN113301491A (en) * | 2021-05-27 | 2021-08-24 | 珠海市精实测控技术有限公司 | Positioning detection device and test platform for microphone |
| CN116456261A (en) * | 2023-06-16 | 2023-07-18 | 河北初光汽车部件有限公司 | Microphone upper cover equipment |
| CN116586248A (en) * | 2023-06-01 | 2023-08-15 | 河北初光汽车部件有限公司 | Wire harness gluing machine |
| CN117214692A (en) * | 2023-04-28 | 2023-12-12 | 东莞市小强电子科技有限公司 | Multifunctional electric performance testing system and testing process for brushless motor |
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2019
- 2019-09-17 CN CN201921537089.XU patent/CN210183548U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112261567A (en) * | 2020-10-20 | 2021-01-22 | 昆山振顺电子科技有限公司 | Microphone circuit board sound testing device and testing method thereof |
| CN113301491A (en) * | 2021-05-27 | 2021-08-24 | 珠海市精实测控技术有限公司 | Positioning detection device and test platform for microphone |
| CN117214692A (en) * | 2023-04-28 | 2023-12-12 | 东莞市小强电子科技有限公司 | Multifunctional electric performance testing system and testing process for brushless motor |
| CN116586248A (en) * | 2023-06-01 | 2023-08-15 | 河北初光汽车部件有限公司 | Wire harness gluing machine |
| CN116586248B (en) * | 2023-06-01 | 2023-10-20 | 河北初光汽车部件有限公司 | Wire harness gluing machine |
| CN116456261A (en) * | 2023-06-16 | 2023-07-18 | 河北初光汽车部件有限公司 | Microphone upper cover equipment |
| CN116456261B (en) * | 2023-06-16 | 2023-09-01 | 河北初光汽车部件有限公司 | Microphone upper cover equipment |
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