CN104569788A - Mainboard voice frequency circuit testing device and method - Google Patents

Abstract

The invention discloses a mainboard audio loop test device, which is characterized in that it includes an integrated test system, a sound-absorbing box, a loudspeaker, a voice-activated switch, a photosensitive resistor and a buzzer, and the voice-activated switch includes an electrically connected wheat head and an LED display lamp, and a photosensitive The resistor and the buzzer are respectively electrically connected to the integrated test system. The integrated test system is used to supply power to the buzzer and to receive the feedback signal of the photoresistor. The speaker and the microphone head are set in the muffler box, and the photoresistor corresponds to the LED display light. set up. Directly simulate the work of the audio circuit, and connect the audio device to the signal output end of the audio circuit of the motherboard. When the audio circuit is working, it can intuitively detect whether the audio device is sounding to determine whether the audio circuit is normal or not. It has the reliability of the traditional human ear test. , At the same time, it can realize high-efficiency automated testing.

Description

A kind of motherboard audio loop test device and test method

technical field

The invention belongs to the technical field of mainboard audio circuit testing, and in particular relates to a mainboard audio circuit testing device and a testing method.

Background technique

The motherboards of mobile phones, tablet computers and other electronic products need to undergo various tests after production to ensure that they can be used normally, including testing the audio circuit of the motherboard. The traditional testing method uses human ear testing, which is highly reliable but efficient. Low, not in line with the value of the current production pursuit of unit cost, so the current motherboard audio loop test technology mainly uses the method of testing the frequency and amplitude of the analog signal on the motherboard audio loop. In this method, on the premise of driving the audio circuit to work, a signal of known frequency and amplitude is given at the beginning of the audio circuit. After the audio circuit is processed, the frequency and amplitude of each signal are tested at the terminal to judge that the audio circuit has been processed. Check whether the final signal is normal. If the frequency and amplitude of the signal recovered by the terminal meet expectations, it is judged that the audio circuit is normal. Usually, the audio circuit on the motherboard of an electronic product includes two signals. Since this test technology only tests a single signal separately, and the audio device requires the cooperation of two signals to work normally, the above test technology is normal for a single signal, but In the case of failures in the coordination circuit and devices, misjudgment will be caused. That is to say, the above test method can only cover part of the audio circuit components, and some components are missing or faulty, and the expected results can also be obtained at the terminal. Specifically, as shown in Figure 1, the current audio loop test technology only conducts separate separate tests for branch 1 and branch 2, and the devices circled in the figure will not be covered, resulting in branch auxiliary and coordination When the device fails, the audio device (SPK) cannot work normally and cannot be detected.

Contents of the invention

For the deficiencies in the above-mentioned prior art, the purpose of the present invention is to design a kind of main board audio loop test device and test method, which directly simulates the audio loop work, and connects the audio device (SPK) at the signal output end of the main board audio loop, when the audio When the loop is working, it can intuitively detect whether the audio device is sounding to determine whether the audio loop is normal or not. It not only has the reliability of traditional human ear testing, but also can realize high-efficiency automated testing.

In order to achieve the above object, the technical solution adopted in the present invention is:

A mainboard audio circuit test device, including an integrated test system, a sound-absorbing box, a speaker, a voice-activated switch, a photoresistor and a buzzer, the voice-activated switch includes an electrically connected wheat head and an LED display light, and the photoresistor and the buzzer are respectively integrated with the The test system is electrically connected, the integrated test system is used to supply power to the buzzer and to receive the feedback signal of the photoresistor, the speaker and the wheat head are set in the sound-absorbing box, and the photoresistor and the LED display light are set correspondingly.

Wherein, the voice-activated switch is provided with a power input terminal, through which the voice-activated switch is electrically connected to an external power supply with stable working voltage. The voice-activated switch also includes a sensitivity adjuster arranged between the microphone head and the LED display light. The sound-absorbing box is a closed box body, and the sound-absorbing box is filled with sound-absorbing cotton.

A method for testing the audio circuit of the main board by utilizing the audio circuit testing device for the aforementioned main board, comprising the following testing process:

a. The integrated test system supplies power to the buzzer, and cooperates with the test software to drive the audio circuit of the main board to work. Place the buzzer on the microphone end of the audio circuit of the main board, and connect the audio signal output end of the audio circuit of the main board to the speaker;

b. The sound of the buzzer provides a stable audio signal to the microphone end of the audio circuit of the main board. After the audio signal is processed by the audio circuit of the main board, it is output from the audio signal output end of the audio circuit of the main board to the speaker, and the speaker restores the audio signal and performs Simulate sound;

c. The wheat head of the voice-activated switch collects the sound signal from the speaker in the sound-absorbing box, and drives the LED display light of the voice-activated switch to emit light after being converted by the circuit. The brightness of the LED display light corresponds to the size of the sound signal collected by the wheat head. ;

d. After the photoresistor monitors the light-emitting state of the LED display lamp, it obtains the corresponding resistance value and feeds it back to the integrated test system, wherein the resistance value of the photoresistor corresponds to the luminous brightness of the LED display lamp;

e. The integrated test system feeds back the obtained resistance value of the photoresistor to the test software, and the test software compares it with the calibrated resistance value to determine whether the audio circuit of the main board is working normally.

After adopting above-mentioned technical scheme, the advantage that the present invention has compared with prior art is:

The invention directly simulates the audio circuit of the main board, connects the speaker at the audio signal output end of the audio circuit of the main board, and realizes the efficient automatic test of the audio circuit of the main board through the sound-light-electric conversion in the detection process, wherein the sound-light conversion guarantees the test Reliability, optical-electrical conversion ensures the high efficiency and accuracy of the test, and it covers all the components of the audio loop of the main board during the test, avoiding misjudgment in traditional test techniques. Moreover, the integrated test system is an integrated test system in the existing test technology, which can effectively utilize existing resources, has good compatibility, and is low in production cost.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further described:

FIG. 1 is a schematic structural diagram of an audio loop described in the background art.

Fig. 2 is a structural schematic diagram of the present invention.

In the figure: 1: Integrated test system; 2: Noise reduction box; 3: Speaker; 4: Wheat head; 5: Sensitivity adjuster; 6: LED display light; 7: Photoresistor; 8: Buzzer.

Detailed ways

The following descriptions are only preferred embodiments of the present invention, and therefore do not limit the protection scope of the present invention.

Embodiment, see shown in Fig. 2.

A mainboard audio loop test device, including an integrated test system 1, a sound-absorbing box 2, a speaker 3, a voice-activated switch, a photoresistor 7 and a buzzer 8, and the voice-activated switch includes a wheat head 4 electrically connected in sequence, a sensitivity adjuster 5 and LED display lamp 6, the size of the sound signal collected by wheat head 4 can be reflected on the luminous brightness of rear end LED display lamp 6, so as to identify whether the sound signal is up to standard. The luminous brightness of lamp 6 is adjusted, so that the luminous brightness of LED display lamp 6 can more accurately reflect the size of the sound signal collected by wheat head 4. The external power supply is electrically connected to the LED display light 6. The voltage of the external power supply needs to be set separately and needs to be kept stable to ensure the accuracy of the test. The buzzer 8 is electrically connected with the integrated test system 1 respectively, the integrated test system 1 is used to supply power to the buzzer 8 and to receive the feedback signal of the photoresistor 7, the loudspeaker 3 and the wheat head 4 are arranged in the muffler box 2, 2 is a closed box body, and the sound-absorbing cotton is filled in the sound-absorbing box 2, and the sound-absorbing cotton plays the role of fixing the internal parts of the box body and isolating external sound interference, so as to improve the test accuracy. Resistor 7 is used to monitor the state of the sound-activated switch LED, and the brightness of the LED directly determines the resistance value of the photoresistor 7. The LED display lamp 6 and the photoresistor 7 can be set inside or outside the silencer box 2, and the LED display lamp 6 and The photosensitive resistor 7 is arranged inside the sound-absorbing box 2, and the light-sensitive resistor 7 will not be affected by external light, and the test is more accurate. Light conversion process, the test is more reliable.

A method for testing the audio circuit of the main board by utilizing the audio circuit testing device for the aforementioned main board, comprising the following testing process:

a. The integrated test system 1 supplies power to the buzzer 8, and cooperates with the test software to drive the audio circuit of the main board to work. Place the buzzer 8 on the microphone end of the audio circuit of the main board, and connect the audio signal output end of the audio circuit of the main board to the speaker 3 ;

b. The sound of the buzzer 8 provides a stable audio signal to the microphone end of the audio circuit of the main board. After the audio signal is processed by the audio circuit of the main board, it is output from the audio signal output end of the audio circuit of the main board to the speaker 3, and the audio is restored by the speaker 3 signal and perform analog sounding;

c. The wheat head 4 of the voice-activated switch collects the sound signal from the loudspeaker 3 in the sound-absorbing box 2, and drives the LED display lamp 6 of the voice-activated switch to emit light after circuit conversion, wherein the luminous brightness of the LED display lamp 6 is the same as that collected by the wheat head 4. corresponding to the size of the sound signal;

d. After the light-emitting state of the LED display lamp 6 is monitored by the photoresistor 7, the corresponding resistance value is obtained and fed back to the integrated test system 1, wherein the resistance value of the photoresistor 7 corresponds to the luminous brightness of the LED display lamp 6;

e. The integrated test system 1 feeds back the obtained resistance value of the photoresistor 7 to the test software, and the test software compares it with the calibrated resistance value to judge whether the main board audio circuit is working normally.

The present invention directly simulates the work of the audio circuit of the main board, connects the speaker 3 to the audio signal output end of the audio circuit of the main board, and realizes efficient automatic testing of the audio circuit of the main board through the sound-light-electric conversion in the detection process, wherein the sound-light conversion ensures Test reliability, optical-electrical conversion ensures test efficiency and accuracy, it covers all components of the audio circuit of the motherboard during the test process, avoiding misjudgments in traditional test techniques. Moreover, the integrated test system 1 is an integrated test system 1 in the existing test technology, which can effectively utilize existing resources, has good compatibility, and is low in production cost.

The above is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims (5)

1. a mainboard audio loop proving installation, it is characterized in that: comprise integrated test system, sound-muffling box, loudspeaker, audio-switch, photoresistance and hummer, audio-switch comprises wheat head and the LED display lamp of electrical connection, photoresistance and hummer are electrically connected with integrated test system respectively, the feedback signal of integrated test system for powering to hummer and for receiving photoresistance, loudspeaker and wheat head are arranged in sound-muffling box, and photoresistance is corresponding with LED display lamp to be arranged.

2. mainboard audio loop proving installation according to claim 1, is characterized in that: audio-switch is provided with power access end, and audio-switch is electrically connected with the outer power supply source of stable operating voltage by this power access end.

3. mainboard audio loop proving installation according to claim 1, is characterized in that: audio-switch also includes the sensitivity control be arranged between wheat head and LED display lamp.

4. mainboard audio loop proving installation according to claim 1, is characterized in that: sound-muffling box is airtight box body, and in sound-muffling box, filling has silencing cotton.

5. utilize as arbitrary in claim 1-4 as described in the method for mainboard audio loop proving installation testing host audio loop, comprise following test process:

A, integrated test system are powered to hummer, and coordinate test software to drive the work of mainboard audio loop, hummer are placed in the microphone end of mainboard audio loop, are connected by the audio signal output end of mainboard audio loop with loudspeaker;

B, hummer sounding provide stable sound signal to the microphone end of mainboard audio loop, this sound signal is after the process of mainboard audio loop, export loudspeaker to from the audio signal output end of mainboard audio loop, reduce this sound signal carry out simulation sounding by loudspeaker;

The wheat head of c, audio-switch collects the voice signal that loudspeaker sends in sound-muffling box, and the LED display lamp through circuit conversion rear drive audio-switch is luminous, and wherein the luminosity of LED display lamp is corresponding with the voice signal size that wheat head collects;

D, photoresistance obtain corresponding resistance after monitoring the luminance of LED display lamp and by it instead to integrated test system, the resistance of wherein photoresistance is corresponding with the luminosity of LED display lamp;

The resistance of the photoresistance got is fed back to test software by e, integrated test system, by test body to rear, itself and demarcation resistance value ratio is judged that whether the work of mainboard audio loop is normal.