PCBA line detection circuit and device

Abstract

The utility model relates to a PCBA circuit detection circuit and device. The detection circuit comprises an auxiliary measurement module and a simulation detection module, wherein the output end of the auxiliary measurement module is used for outputting a preset current; the simulation detection module is connected to the output end of the auxiliary measurement module, and is used for transmitting the preset current to a plurality of target test points of the to-be-tested line and measuring voltage values of the plurality of target test points; the input end of the auxiliary measurement module is connected to the output end of the simulation detection module, and the auxiliary measurement module is used for receiving the voltage values of the multiple target test points and feeding back the voltage values to the main control module so as to obtain voltage data of different target test points in the to-be-tested line. The PCBA circuit detection circuit and device provided by the utility model can meet customized circuit test requirements of a PCBA board.

Description

Technical Field

[0001] The present application relates to the field of circuit detection technology, and in particular to a detection circuit and device for a PCBA circuit. Background Art

[0002] Currently, circuit detection devices in related technologies require a long test time, depending on the number of circuits in the product being tested. For example, PCBAs are customizable, with different shapes and configurations containing different circuits to be tested. Currently, there is no universal test equipment.

[0003] Therefore, there are many inconveniences in measuring the circuit resistance of PCBA boards or the open or short circuit of specified circuits. Manual customized measurement greatly increases the measurement cost. Utility Model Content

[0004] Based on this, it is necessary to provide a PCBA circuit detection circuit and device that can meet the customized circuit testing requirements of PCBA boards.

[0005] A detection circuit for a PCBA circuit includes an auxiliary measurement module and an analog detection module, wherein:

[0006] The output end of the auxiliary measurement module is used to output a preset current;

[0007] The analog detection module is connected to the output end of the auxiliary measurement module, and is used to transmit the preset current to multiple target test points of the circuit to be tested, and is used to measure the voltage values of the multiple target test points;

[0008] The input end of the auxiliary measurement module is connected to the output end of the analog detection module, and is used to receive the voltage values of multiple target test points and feed the voltage values back to the main control module to obtain voltage data of different target test points in the circuit to be tested.

[0009] In one embodiment, the auxiliary measurement module includes:

[0010] a first auxiliary module, configured to generate an analog current signal upon receiving a current output instruction from the main control module, and output a preset current to the analog detection module;

[0011] The second auxiliary module is connected to the output end of the analog detection module, and is used to receive the voltage values of the plurality of target test points and feed the voltage values back to the main control module.

[0012] In one embodiment, the first auxiliary module includes:

[0013] a first digital-to-analog converter, configured to generate an analog voltage signal upon receiving a digital voltage signal from the main control module;

[0014] The volt-ampere conversion circuit is connected to the output end of the first digital-to-analog conversion unit and is used to convert the voltage value into a preset current according to a preset ratio when receiving the analog voltage signal.

[0015] In one embodiment, the second auxiliary module includes:

[0016] an operational amplifier connected to the analog detection module, and configured to generate an analog voltage difference signal when receiving voltages of the plurality of target test points;

[0017] The second digital-to-analog converter is connected to the output end of the operational amplifier, and is used to generate a digital pressure difference signal when receiving the analog pressure difference signal, and feed the digital pressure difference signal back to the main control module.

[0018] In one embodiment, the analog detection module includes multiple analog switch groups, which form multiple current channels. The current channels are used to connect the auxiliary measurement module and the target test points, and are turned on or off according to the switch control instructions of the main control module to transmit the preset current to multiple target test points of the circuit to be tested, so as to measure the voltage values of the multiple target test points.

[0019] In one embodiment, the analog detection module includes a first analog switch group, a second analog switch group, a third analog switch group, and a fourth analog switch group, wherein:

[0020] a first analog switch group, one end of which is connected to the volt-ampere conversion circuit, and the other end of which is connected to a first target test point of a first measuring end in the circuit to be tested;

[0021] a second analog switch group, one end of which is connected to the second target test point of the first measurement end in the circuit to be tested, and the other end of which is connected to the operational amplifier;

[0022] a third analog switch group, one end of which is connected to the operational amplifier, and the other end of which is connected to a third target test point of the second measurement end in the circuit to be tested;

[0023] A fourth analog switch group has one end connected to a fourth target test point of the second measuring end in the circuit to be tested, and the other end connected to the ground line.

[0024] In one embodiment, the resistance value of the first analog switch group, the resistance value of the second analog switch group, the resistance value of the third analog switch group, and the resistance value of the fourth analog switch group are all the same.

[0025] A detection device for a PCBA circuit includes the detection circuit of the PCBA circuit and a pressing substrate for fixing and installing the test circuit of the analog detection module.

[0026] In one embodiment, the press-fit substrate is clamped to the test circuit.

[0027] In one embodiment, the pressing substrate includes a plurality of detection probes, and the detection probes are clamped to the target test points.

[0028] The above-mentioned PCBA circuit detection circuit and device, because the analog detection module can transmit the preset current output by the auxiliary measurement module to multiple target test points of the circuit to be tested and is used to measure the voltage values of the multiple target test points, can flexibly measure multiple different test points and then feed back the measured voltage values to the main control module to obtain voltage data of different target test points in the circuit to be tested, thereby meeting the customized circuit testing requirements of the PCBA board. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 1. A schematic diagram of a circuit principle of a detection circuit for a PCBA circuit according to an embodiment;

[0031] Figure 2 This is a schematic diagram of a circuit principle of a detection circuit for a PCBA circuit according to another embodiment;

[0032] Figure 3 The figure is a schematic diagram of the circuit principle of a detection device for a PCBA circuit according to another embodiment.

[0033] Explanation of the reference numerals: 100, auxiliary measurement module; 110, first auxiliary module; 111, first digital-to-analog converter; 112, volt-ampere conversion circuit; 120, second auxiliary module; 121, operational amplifier; 122, second digital-to-analog converter; 200, analog detection module; 210, first analog switch group; 220, second analog switch group; 230, third analog switch group; 240, fourth analog switch group; 300, press-fit substrate. DETAILED DESCRIPTION

[0034] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0036] It will be understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor without departing from the scope of this application. The first resistor and the second resistor are both resistors, but they are not the same resistor.

[0037] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if there is transmission of electrical signals or data between the connected circuits, modules, units, etc.

[0038] It is understood that “at least one” refers to one or more, “a plurality” refers to two or more, and “at least a portion of an element” refers to a portion or all of an element.

[0039] As used herein, the singular forms "a," "an," and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include," "comprising," "having," and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Furthermore, the term "and / or" as used in this specification includes any and all combinations of the relevant listed items.

[0040] like Figure 1 As shown, the detection circuit of the PCBA circuit of one embodiment includes an auxiliary measurement module 100 and an analog detection module 200, wherein:

[0041] The output end of the auxiliary measurement module 100 is used to output a preset current; the analog detection module 200 is connected to the output end of the auxiliary measurement module 100, and is used to transmit the preset current to multiple target test points of the circuit to be tested, and is used to measure the voltage values of the multiple target test points; the input end of the auxiliary measurement module 100 is connected to the output end of the analog detection module 200, and is used to receive the voltage values of the multiple target test points, and feed the voltage values back to the main control module to obtain voltage data of different target test points in the circuit to be tested.

[0042] Furthermore, the auxiliary measurement module 100 is used to output a preset current corresponding to the current value indicated by the current output instruction (IO_MuxCtrl control signal and En enable signal) when receiving the current output instruction (IO_MuxCtrl control signal and En enable signal) issued by the main control module. The analog detection module 200 is used to simulate the current output of the circuit at multiple measurement points. Department A plurality of current output points are formed, so that when a preset current is received, the preset current is output to a plurality of measuring points of the circuit to be tested through the plurality of current output points to measure the voltage values of the plurality of target test points.

[0043] like Figure 1 As shown, in an exemplary embodiment, the auxiliary measurement module 100 may include a first auxiliary module 110 and a second auxiliary module 120. The first auxiliary module 110 is configured to generate an analog current signal upon receiving a current output instruction from the main control module, and output a preset current to the analog detection module 200; the second auxiliary module 120 is connected to the output end of the analog detection module 200, and is configured to receive voltage values of multiple target test points and feed the voltage values back to the main control module.

[0044] For example, Figure 1 As shown, the first auxiliary module 110 may include a first digital-to-analog converter 111 and a volt-ampere conversion circuit 112. The first digital-to-analog converter 111 is configured to generate an analog current signal upon receiving a digital current signal from the main control module; the volt-ampere conversion circuit 112 is connected to the output terminal of the first digital-to-analog conversion unit and is configured to output a preset current according to the analog current signal upon receiving the analog current signal.

[0045] Furthermore, if Figure 1 As shown, the first digital-to-analog converter 111 can be a DAC chip (Digital-to-Analog Converter (DAC) chip). A DAC chip is an electronic component that converts digital signals into analog signals. Digital signals (usually in binary form) are generated by computers and digital devices, but these signals need to be converted to analog signals in order to be used by traditional analog devices (such as speakers, headphones, and analog monitors).

[0046] Furthermore, if Figure 1 As shown, the volt-ampere conversion circuit 112 may include a programmable power supply chip and an operational amplifier. Specifically, the volt-ampere conversion circuit 112 is a device that converts a voltage signal into a current signal. A programmable power supply chip is a power management chip that can adjust the output voltage or current via an external control signal. It is used to provide a stable and adjustable voltage or current source, thereby ensuring that the circuit can maintain optimal performance under different operating conditions, thereby adjusting the input voltage and controlling the output current. This type of chip generally has high precision, stability, and flexibility, and can adjust output parameters in real time as needed. An operational amplifier is a high-gain electronic amplifier used for precise current or voltage measurement and conversion. In the volt-ampere conversion circuit 112, the operational amplifier can be configured as a current-to-voltage converter.

[0047] For example, Figure 1 As shown, the auxiliary measurement module 100 can be composed of an ARM chip (Advanced RISC Machine (ARM) chip), a DAC chip, and a volt-ampere conversion circuit 112. The ARM chip is a processor chip based on the RISC architecture, offering high performance and low power consumption. After receiving instructions from the host computer (main control module), the ARM chip configures the programmable power supply chip and operational amplifier into the volt-ampere conversion circuit 112. The DAC chip's output is then connected to the volt-ampere conversion circuit 112, enabling it to output a specified current.

[0048] For example, Figure 1 As shown, the second auxiliary module 120 may include an operational amplifier 121 and a second digital-to-analog converter 122. The operational amplifier 121 is connected to the analog detection module 200 and is used to generate an analog differential pressure signal based on the voltages of multiple target test points; the second digital-to-analog converter 122 is connected to the output end of the operational amplifier 121 and is used to generate a digital differential pressure signal based on the analog differential pressure signal when receiving the analog differential pressure signal, and feed the digital differential pressure signal back to the main control module.

[0049] Exemplarily, the first digital-to-analog converter 111 generates an analog voltage signal upon receiving a digital voltage signal from the main control module. The volt-ampere conversion circuit 112, upon receiving the analog voltage signal, outputs a preset current according to a preset ratio, thereby outputting a detection signal (I_Force) corresponding to the preset current to the circuit under test. An analog detection module 200 is connected to the line connecting the operational amplifier and the circuit under test, and is configured to receive a feedback signal (I_Back) to obtain a measured voltage value. Upon receiving a high-voltage sensing signal (VSENSE_P) and a low-voltage sensing signal (VSENSE_N), the operational amplifier 121 generates an analog differential pressure signal. Upon receiving the analog differential pressure signal, the second digital-to-analog converter 122 generates a digital differential pressure signal based on the analog differential pressure signal and feeds it back to the main control module.

[0050] In an exemplary embodiment, the analog detection module 200 may include multiple analog switch groups, each of which forms multiple current channels. The current channels are used to connect the auxiliary measurement module 100 and the target test points. The current channels are turned on or off according to switch control instructions from the main control module to transmit a preset current to the multiple target test points of the circuit under test, thereby measuring the voltage values of the multiple target test points. Exemplarily, the analog switch may be a 32-channel multiplexer (32CH MUX).

[0051] For example, Figure 1 As shown, the analog detection module 200 includes a first analog switch group 210, a second analog switch group 220, a third analog switch group 230 and a fourth analog switch group 240, wherein: the first analog switch group 210 has one end connected to the volt-ampere conversion circuit 112, and the other end connected to the first target test point of the first measuring end in the circuit to be tested; the second analog switch group 220 has one end connected to the second target test point of the first measuring end in the circuit to be tested, and the other end connected to the operational amplifier 121; the third analog switch group 230 has one end connected to the operational amplifier 121, and the other end connected to the third target test point of the second measuring end in the circuit to be tested; the fourth analog switch group 240 has one end connected to the fourth target test point of the second measuring end in the circuit to be tested, and the other end connected to the ground line.

[0052] Furthermore, the resistance values of the first analog switch group 210, the second analog switch group 220, the third analog switch group 230, and the fourth analog switch group 240 are all the same. The number of current channels may be 150.

[0053] Specifically, the ARM chip can individually switch on 150 channels of multiple analog switches. These analog switches can be designed and combined on the circuit to form a four-wire test circuit with equal resistance. The device connects the test circuit to the product under test through the crimping of the POGO board. The current output by the volt-ampere conversion circuit 112 flows through the test circuit and ultimately, through the crimping of the POGO, forms a voltage on the product. This voltage flows to the ground through the analog switch grounding circuit. This voltage can be synchronously detected by the four-wire test circuit and the ADC. The ADC then feeds the voltage value on each channel back to the ARM chip, which sends it to the host computer main control module for calculation, thereby obtaining the resistance value of each channel of the product under test. Because the 150 analog switches are independent of each other, this system can not only measure the resistance and continuity of the PCBA circuit, but also test short circuits between different networks of the PCBA circuit.

[0054] It is understandable that the analog switch combination of the above-mentioned analog detection module 200 can also adopt other forms, and is not limited to the forms mentioned in the above embodiments, as long as it can achieve the function of completing the resistance and continuity test of the PCBA line or the short circuit test between different networks of the PCBA line.

[0055] In an exemplary embodiment, Figure 2 As shown, the PCBA circuit detection circuit includes a DAC chip, a volt-ampere conversion circuit 112, a 32-channel multiplexer chip, an operational amplifier, and an ADC chip. The DAC chip, acting as the first digital-to-analog converter 111, generates an analog current signal upon receiving a digital current signal from the main control module (the ARM main control chip and its peripheral circuits). The volt-ampere conversion circuit 112 is configured to output a preset current upon receiving the analog current signal, thereby outputting a detection signal (I_Force) corresponding to the preset current to the device under test (DUT). The operational amplifier is connected to the line connecting the circuit under test with a first analog switch group 210, a second analog switch group 220, a third analog switch group 230, and a fourth analog switch group 240, which receive a feedback signal (I_Back) to obtain a measured voltage value. The operational amplifier 121 generates an analog differential pressure signal upon receiving a high-voltage sensing signal (VSENSE_P) or a low-voltage sensing signal (VSENSE_N). The (high-precision) ADC chip is configured to generate a digital differential pressure signal based on the analog differential pressure signal and feed it back to the main control module.

[0056] Among them, the first analog switch group 210 has one end connected to the volt-ampere conversion circuit 112, and the other end connected to the first target test point of the first measuring end in the circuit to be tested; the second analog switch group 220 has one end connected to the connection line between the second target test point of the first measuring end in the circuit to be tested and the first connection port of the operational amplifier 121; the third analog switch group 230 is connected to the connection line between the first connection port of the operational amplifier 121 and the third target test point of the second measuring end in the circuit to be tested; the fourth analog switch group 240 has one end connected to the fourth target test point of the second measuring end in the circuit to be tested, and the other end connected to the ground wire.

[0057] Furthermore, the first analog switch group 210 includes a first analog switch 211, a second analog switch 212, a third analog switch 213, a fourth analog switch 214, and a fifth analog switch 215. The first control signal (IO_P_MuxCtrl_A0) and the first enable signal (P_EN0) are used to control the on / off of the first analog switch 211; the second control signal (IO_P_MuxCtrl_A1) and the second enable signal (P_EN1) are used to control the on / off of the second analog switch 212; the third control signal (IO_P_MuxCtrl_A2) and the third enable signal (P_EN2) are used to control the on / off of the third analog switch 213; the fourth control signal (IO_P_MuxCtrl_A3) and the fourth enable signal (P_EN3) are used to control the on / off of the fourth analog switch 214; and the fifth control signal (IO_P_MuxCtrl_A4) and the fifth enable signal (P_EN4) are used to control the on / off of the fifth analog switch 215.

[0058] Furthermore, the second analog switch group 220 includes a first analog switch 221, a second analog switch 222, a third analog switch 223, a fourth analog switch 224, and a fifth analog switch 225. The first control signal (IO_P_MuxCtrl_A0) and the first enable signal (P_EN0) are used to control the on / off of the first analog switch 221; the second control signal (IO_P_MuxCtrl_A1) and the second enable signal (P_EN1) are used to control the on / off of the second analog switch 222; the third control signal (IO_P_MuxCtrl_A2) and the third enable signal (P_EN2) are used to control the on / off of the third analog switch 223; the fourth control signal (IO_P_MuxCtrl_A3) and the fourth enable signal (P_EN3) are used to control the on / off of the fourth analog switch 224; and the fifth control signal (IO_P_MuxCtrl_A4) and the fifth enable signal (P_EN4) are used to control the on / off of the fifth analog switch 225.

[0059] Furthermore, the third analog switch group 230 includes a first analog switch 231, a second analog switch 232, a third analog switch 233, a fourth analog switch 234, and a fifth analog switch 235. The first control signal (IO_N_MuxCtrl_A0) and the first enable signal (N_EN0) are used to control the on / off of the first analog switch 231; the second control signal (IO_N_MuxCtrl_A1) and the second enable signal (N_EN1) are used to control the on / off of the second analog switch 232; the third control signal (IO_N_MuxCtrl_A2) and the third enable signal (N_EN2) are used to control the on / off of the third analog switch 233; the fourth control signal (IO_N_MuxCtrl_A3) and the fourth enable signal (N_EN3) are used to control the on / off of the fourth analog switch 234; and the fifth control signal (IO_N_MuxCtrl_A4) and the fifth enable signal (N_EN4) are used to control the on / off of the fifth analog switch 235.

[0060] Furthermore, the second analog switch group 240 includes a first analog switch 241, a second analog switch 242, a third analog switch 243, a fourth analog switch 244, and a fifth analog switch 245. The first control signal (IO_N_MuxCtrl_A0) and the first enable signal (N_EN0) are used to control the on / off of the first analog switch 241; the second control signal (IO_N_MuxCtrl_A1) and the second enable signal (N_EN1) are used to control the on / off of the second analog switch 242; the third control signal (IO_N_MuxCtrl_A2) and the third enable signal (N_EN2) are used to control the on / off of the third analog switch 243; the fourth control signal (IO_N_MuxCtrl_A3) and the fourth enable signal (N_EN3) are used to control the on / off of the fourth analog switch 244; and the fifth control signal (IO_N_MuxCtrl_A4) and the fifth enable signal (N_EN4) are used to control the on / off of the fifth analog switch 245.

[0061] like Figure 3As shown, a PCBA circuit detection device according to one embodiment includes the aforementioned PCBA circuit detection circuit, which can be used for PCBA (Printed Circuit Board Assembly) / FPC (Flexible Printed Circuit) circuits. The device also includes a press-fit substrate 300, which is used to securely mount the test circuit of the analog detection module 200. For example, the press-fit substrate 300 can be positioned at both ends of the test circuit of the analog detection module 200 to connect the test circuit to the connection terminals of the detection circuit of the PCBA circuit. The press-fit substrate 300 is snap-fitted to the test circuit, thereby enabling resistance detection of the PCBA etched circuits and open and short circuit detection between any circuits, as required.

[0062] In one embodiment, the crimping substrate 300 includes multiple test probes that are snap-fitted to target test points. Specifically, the test probes contact and connect with the test terminals of the circuit under test at the target test points. During use, the crimping action of the crimping substrate 300 allows the test probes to be installed on the circuit under test and disconnected after use.

[0063] For example, the crimping substrate 300 can be configured in various shapes, or the combination and distribution of the detection probes can be configured in various configurations. This allows adaption to PCBAs of varying shapes and connectors by simply replacing the crimping substrate 300 or the combination and distribution of the detection probes. Consequently, the device improves work efficiency, reduces work time, and facilitates operation. It also reduces the number of parts used, thereby reducing environmental pollution.

[0064] In another exemplary embodiment, a PCBA circuit testing device includes an ARM IC, multiple power ICs, a DAC chip, a 16-bit ADC chip, a programmable power chip, an operational amplifier circuit, a volt-ampere conversion circuit, an analog switch grounding circuit, a test expansion circuit, a calibration circuit, a network port, and other communication circuits. After receiving a test command from a host computer main control module, the ARM chip configures the programmable power chip and operational amplifier into a volt-ampere conversion circuit. The DAC chip's output is then connected to the volt-ampere conversion circuit, enabling it to output a specified current. Simultaneously, the ARM chip switches on each of the 150 analog switch channels. These analog switches are designed to form a four-wire test circuit with equal resistance. The device connects the test circuit to the product under test through a POGO (Positioning Gate Operator) board crimp. The current output by the volt-ampere conversion circuit flows through the test circuit and ultimately, through the POGO crimp, creates a voltage on the product. This voltage flows through the analog switch grounding circuit to ground. This voltage is then detected synchronously by the four-wire test circuit and the ADC. The ADC then feeds the voltage value on each channel back to the ARM chip, which then sends it to the host computer for calculation, resulting in the resistance value of each channel of the product under test. Since the 150-channel analog switches are independent of each other, in addition to measuring the resistance and continuity of the PCBA circuit, it is also possible to test the short circuit between different networks of the PCBA circuit.

[0065] In the description of this specification, reference to the terms "some embodiments" or "other embodiments" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0066] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A detection circuit for a PCBA circuit, characterized in that: It includes auxiliary measurement module and analog detection module, among which: The output end of the auxiliary measurement module is used to output a preset current; The analog detection module is connected to the output end of the auxiliary measurement module, and is used to transmit the preset current to multiple target test points of the circuit to be tested, and is used to measure the voltage values of the multiple target test points; The input end of the auxiliary measurement module is connected to the output end of the analog detection module, and is used to receive the voltage values of multiple target test points and feed the voltage values back to the main control module to obtain voltage data of different target test points in the circuit to be tested.

2. The detection circuit of the PCBA circuit according to claim 1, characterized in that: The auxiliary measurement module includes: a first auxiliary module, configured to generate an analog current signal upon receiving a current output instruction from the main control module, and output a preset current to the analog detection module; The second auxiliary module is connected to the output end of the analog detection module, and is used to receive the voltage values of the plurality of target test points and feed the voltage values back to the main control module.

3. The detection circuit of the PCBA circuit according to claim 2, characterized in that: The first auxiliary module includes: a first digital-to-analog converter, configured to generate an analog voltage signal upon receiving a digital voltage signal from the main control module; The volt-ampere conversion circuit is connected to the output end of the first digital-to-analog converter and is used to convert the voltage value according to a preset ratio and output a preset current when receiving the analog voltage signal.

4. The detection circuit of the PCBA circuit according to claim 3, characterized in that: The second auxiliary module includes: an operational amplifier connected to the analog detection module, and configured to generate an analog voltage difference signal when receiving voltages of the plurality of target test points; The second digital-to-analog converter is connected to the output end of the operational amplifier, and is used to generate a digital pressure difference signal when receiving the analog pressure difference signal, and feed the digital pressure difference signal back to the main control module.

5. The detection circuit of the PCBA circuit according to claim 4, characterized in that: The analog detection module includes multiple analog switch groups, which form multiple current channels. The current channels are used to connect the auxiliary measurement module and the target test points, and are turned on or off according to the switch control instructions of the main control module to transmit the preset current to multiple target test points of the circuit to be tested, so as to measure the voltage values of the multiple target test points.

6. The detection circuit of the PCBA circuit according to claim 5, characterized in that: The analog detection module includes a first analog switch group, a second analog switch group, a third analog switch group and a fourth analog switch group, wherein: a first analog switch group, one end of which is connected to the volt-ampere conversion circuit, and the other end of which is connected to a first target test point of a first measuring end in the circuit to be tested; a second analog switch group, one end of which is connected to the second target test point of the first measurement end in the circuit to be tested, and the other end of which is connected to the operational amplifier; a third analog switch group, one end of which is connected to the operational amplifier, and the other end of which is connected to a third target test point of the second measurement end in the circuit to be tested; A fourth analog switch group has one end connected to a fourth target test point of the second measuring end in the circuit to be tested, and the other end connected to the ground line.

7. The detection circuit of the PCBA circuit according to claim 6, characterized in that: The resistance value of the first analog switch group, the resistance value of the second analog switch group, the resistance value of the third analog switch group, and the resistance value of the fourth analog switch group are all the same.

8. A PCBA circuit detection device, characterized in that: The device includes a detection circuit for a PCBA circuit according to any one of claims 1 to 7, and further includes a press-fit substrate, wherein the press-fit substrate is used for fixing and installing the test circuit of the analog detection module.

9. The PCBA circuit detection device according to claim 8, characterized in that: The compression substrate is clamped to the test circuit.

10. The PCBA circuit detection device according to claim 9, characterized in that: The pressing substrate includes a plurality of detection probes, and the detection probes are clamped on the target test points.

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