Equalizer circuit board detection device

Abstract

The utility model relates to a circuit board detection device, in particular to an equalizer circuit board detection device. Comprising a single-chip microcomputer module, and an acquisition module, a buzzer module, a communication module, a control module and a power supply module which are connected with the single-chip microcomputer module. The acquisition module, the communication module and the control module are connected with the power supply module; the acquisition module is connected with a plurality of circuit test nodes on the equalizer circuit board, and the equalizer circuit board is connected with the load module; detection thresholds corresponding to the circuit test nodes are stored in the single-chip microcomputer module, the single-chip microcomputer module receives voltage signals of the circuit test nodes acquired by the acquisition module and judges the voltage signals through the corresponding detection thresholds, and a judgment result is transmitted to the display module through the communication module. According to the utility model, a multi-circuit test node voltage detection mode is adopted, the detection accuracy of the equalizer circuit board is greatly improved, and the improvement of the yield of the equalizer circuit board is facilitated.

Description

Technical Field

[0001] This utility model relates to a circuit board testing device, specifically to an equalizer circuit board testing device. Background Technology

[0002] The booming automotive industry has greatly propelled the rapid growth of the auto parts industry, in which auto parts testing equipment plays a crucial role in ensuring vehicle safety and product performance. Currently, most trucks use a 48V power system, typically achieved by connecting two 24V power sources in series. However, during charge and discharge cycles, voltage differences can develop between the two power sources. This voltage difference not only reduces the lifespan of the power supply but also increases the operating costs for truck drivers due to frequent battery replacements. To address this issue, power equalizers have emerged. Their main function is to reduce the voltage difference between the two power sources, thereby extending battery life.

[0003] With the widespread application of equalizers in the automotive industry, the assurance of their product quality is receiving increasing attention. Functional testing of the equalizer circuit board is a crucial step in the equalizer manufacturing process.

[0004] However, in the existing testing process for equalizer products, the testing is usually only conducted on the voltage range that the equalizer can balance, which makes it difficult to guarantee the yield rate of the equalizer. Utility Model Content

[0005] The purpose of this invention is to solve the technical problem that existing testing equipment only tests the voltage range that the equalizer can equalize, making it difficult to guarantee the yield rate of the equalizer. Therefore, this invention provides an equalizer circuit board testing device.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0007] An equalizer circuit board testing device includes a microcontroller module, and a data acquisition module, a buzzer module, a communication module, a control module and a power supply module connected thereto.

[0008] The acquisition module, communication module, and control module are all connected to the power supply module;

[0009] The acquisition module is connected to multiple circuit test nodes on the equalizer circuit board, and the equalizer circuit board is connected to the load module.

[0010] The microcontroller module stores detection thresholds corresponding to each circuit test node. The microcontroller module receives voltage signals from each circuit test node collected by the acquisition module, judges the voltage signals according to the corresponding detection thresholds, and transmits the judgment results to the display module by the communication module.

[0011] Furthermore, the power supply module includes a VCC power input terminal, a +12V power output terminal, a +5V power output terminal, and a TPGND ground terminal;

[0012] The VCC power input terminal is connected to one end of fuse F2, and the other end of fuse F2 is connected to the positive terminal of diode D38. The negative terminal of diode D38 is connected to one end of capacitor C9, capacitor C26, resistor R2, and the first pin of transistor Q3. The other ends of capacitor C9 and capacitor C26 are grounded and TPGND is grounded.

[0013] The other end of resistor R2 is connected to the second pin of transistor Q3, the negative terminal of TVS diode D37, the positive terminal of TVS diode D37 to ground, and the TPGND ground terminal.

[0014] The third pin of transistor Q3 is connected to the +12V power output terminal, the third pin of voltage conversion chip U24, and one end of capacitors C8, C36, C19, C20, C21, C22, C23, C24, C25, and C27. The other ends of capacitors C8, C36, C19, C20, C21, C22, C23, C24, C25, and C27 are grounded and connected to the TPGND ground terminal.

[0015] The first pin of the voltage conversion chip U24 is grounded and the TPGND ground terminal;

[0016] The second and fourth pins of the voltage conversion chip U24 are connected, and connected to one end of the +5V power output terminal, capacitors C10, C11, C13, C14, resistors R115, R4, and R5.

[0017] The other ends of capacitors C10, C11, C13, and C14 are grounded and connected to the TPGND grounding terminal.

[0018] The other end of resistor R115 is connected to the positive terminal of LED1, and the negative terminal of LED1 is grounded and connected to the TPGND grounding terminal.

[0019] The other end of resistor R4 is connected to the positive terminal of LED2, and the other end of resistor R5 is connected to the positive terminal of LED3. The negative terminals of LED2 and LED3 are both connected to the microcontroller module.

[0020] Furthermore, the microcontroller module is equipped with a buzzer module, which is connected to the +5V power output terminal.

[0021] Furthermore, the microcontroller module is equipped with a programming port, which is connected to the +5V power output terminal;

[0022] The microcontroller is connected to the programming interface of the equalizer circuit board via a programming port.

[0023] Furthermore, the control module includes a start button SW1 and an end button SW2; both the start button SW1 and the end button SW2 are connected to the microcontroller module.

[0024] A capacitor C7 is connected in parallel across the two ends of the start button SW1. One end of capacitor C7 is grounded, and the other end of capacitor C7 is connected to one end of resistor R71. The other end of resistor R71 is connected to the +5V power output terminal.

[0025] A capacitor C6 is connected in parallel across the two ends of the end button SW2. One end of capacitor C6 is grounded, and the other end of capacitor C6 is connected to one end of resistor R70. The other end of resistor R70 is connected to the +5V power output terminal.

[0026] Furthermore, the acquisition module includes multiple acquisition resistor modules and multiple amplifier circuit modules corresponding to the acquisition resistor modules;

[0027] The resistance acquisition module includes acquisition probe Q1G and acquisition probe Q2G;

[0028] The acquisition probe Q1G is connected to one end of resistor R6, the other end of resistor R6 is connected to the negative terminal of TVS diode D1 and one end of resistor R18, and the positive terminal of TVS diode D1 and the other end of resistor R18 are grounded.

[0029] The acquisition probe Q2G is connected to one end of resistor R7, the other end of resistor R7 is connected to the negative terminal of TVS diode D2 and one end of resistor R19, and the positive terminal of TVS diode D2 and the other end of resistor R19 are grounded.

[0030] The amplifier circuit module includes operational amplifier U6.1 and operational amplifier U6.2;

[0031] The third pin of operational amplifier U6.1 is connected to resistor R6, TVS diode D1, and resistor R18;

[0032] The first, second, and eighth pins of the operational amplifier U6.1 are connected together and connected to one end of resistor R77 and the +12V power supply output terminal. The other end of resistor R77 is connected to one end of capacitor C37 and the microcontroller module; the other end of capacitor C37 is grounded.

[0033] The fourth pin of operational amplifier U6.1 is grounded;

[0034] The fifth pin of operational amplifier U6.2 is connected to resistor R7, TVS diode D2, and resistor R19;

[0035] The sixth and seventh pins of the operational amplifier U6.2 are connected together and connected to one end of the resistor R78. The other end of the resistor R78 is connected to one end of the capacitor C38 and the microcontroller module; the other end of the capacitor C38 is grounded.

[0036] Furthermore, a relay module is provided between the acquisition module and the circuit test node of the equalizer circuit board, and the relay module is connected to the power supply module and the microcontroller module.

[0037] Furthermore, the relay module includes a relay RLY1, the first pin of which is connected to one end of a fuse F1, and the other end of the fuse F1 is connected to the VCC power input terminal.

[0038] A diode D33 is connected in series between the second and fifth pins of relay RLY1, and the cathode of diode D33 is connected to the fifth pin of relay RLY1 and the +12V power output terminal.

[0039] The third pin of relay RLY1 is connected to the TPVCC terminal;

[0040] The second pin of relay RLY1 is connected to the first pin of transistor Q1 and the negative terminal of diode D34. The positive terminal of diode D34 is connected to the second pin of transistor Q1 and grounded. The third pin of transistor Q1 is connected to one end of resistor R75, and the other end of resistor R75 is connected to the microcontroller module.

[0041] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0042] 1. The equalizer circuit board testing device provided by this utility model connects the acquisition module to multiple circuit test nodes on the equalizer circuit board, and sets the detection threshold corresponding to each circuit test node in the microcontroller module. During the testing process, the microcontroller module can judge the voltage signals of each circuit test node based on the voltage signals acquired by the acquisition module and the corresponding detection threshold. The judgment result is then transmitted to the display module by the communication module, where it is displayed intuitively. This utility model adopts a multi-circuit test node voltage detection method, which greatly improves the accuracy of equalizer circuit board testing and helps to improve the yield rate of equalizer circuit boards.

[0043] 2. The equalizer circuit board testing device provided by this utility model has a relatively simple structure and is highly portable and convenient. Attached Figure Description

[0044] Figure 1This is a structural block diagram of an embodiment of the present utility model;

[0045] Figure 2 This is a schematic diagram of the circuit structure of the microcontroller module in an embodiment of this utility model;

[0046] Figure 3 This is a schematic diagram of the circuit structure of the load module in an embodiment of this utility model;

[0047] Figure 4 This is a schematic diagram of the circuit structure of the power supply module in an embodiment of this utility model;

[0048] Figure 5 This is a schematic diagram of the circuit structure of the communication module in an embodiment of this utility model;

[0049] Figure 6 This is a schematic diagram of the circuit structure of the buzzer module in an embodiment of this utility model;

[0050] Figure 7 This is a schematic diagram of the circuit structure of the programming port in an embodiment of this utility model;

[0051] Figure 8 This is a schematic diagram of the circuit structure of the control module in an embodiment of this utility model;

[0052] Figure 9 This is a schematic diagram of the circuit structure of the resistance acquisition module in an embodiment of this utility model;

[0053] Figure 10 This is a schematic diagram of the amplifier circuit module in an embodiment of the present invention;

[0054] Figure 11 This is a schematic diagram of the circuit structure of the relay module in an embodiment of this utility model. Detailed Implementation

[0055] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0056] like Figure 1 As shown, an equalizer circuit board testing device includes a microcontroller module, the circuit structure of which is as follows: Figure 2As shown, the module includes a data acquisition module, a buzzer module, a communication module, a control module, and a power supply module connected to the microcontroller module. The data acquisition module, communication module, and control module are all connected to the power supply module. The data acquisition module is connected to multiple circuit test nodes on the equalizer circuit board, and the equalizer circuit board is connected to the load module. The circuit structure of the load module is shown below. Figure 3 As shown.

[0057] The microcontroller module stores detection thresholds corresponding to each circuit test node. It receives voltage signals from each circuit test node acquired by the acquisition module, judges the voltage signals using the corresponding detection thresholds, and transmits the judgment results to the display module via the communication module. The circuit structure of the communication module is as follows: Figure 5 As shown.

[0058] like Figure 4 As shown, the power supply module includes a VCC power input terminal, a +12V power output terminal, a +5V power output terminal, and a TPGND ground terminal.

[0059] The VCC power input terminal is connected to one end of fuse F2, and the other end of fuse F2 is connected to the positive terminal of diode D38. The negative terminal of diode D38 is connected to one end of capacitor C9, capacitor C26, resistor R2, and the first pin of transistor Q3. The other ends of capacitors C9 and C26 are grounded and connected to the TPGND grounding terminal.

[0060] The other end of resistor R2 is connected to the second pin of transistor Q3, the negative terminal of TVS diode D37, the positive terminal of TVS diode D37 to ground, and the TPGND ground terminal.

[0061] The third pin of transistor Q3 is connected to the +12V power output terminal, the third pin of voltage conversion chip U24, and one end of capacitors C8, C36, C19, C20, C21, C22, C23, C24, C25, and C27. The other ends of capacitors C8, C36, C19, C20, C21, C22, C23, C24, C25, and C27 are grounded and connected to the TPGND ground terminal.

[0062] The first pin of the voltage conversion chip U24 is grounded and the TPGND ground terminal;

[0063] The second and fourth pins of the voltage conversion chip U24 are connected, and connected to one end of the +5V power output terminal, capacitors C10, C11, C13, C14, resistors R115, R4, and R5.

[0064] The other ends of capacitors C10, C11, C13, and C14 are grounded and connected to the TPGND grounding terminal.

[0065] The other end of resistor R115 is connected to the positive terminal of LED1, and the negative terminal of LED1 is grounded and connected to the TPGND grounding terminal.

[0066] The other end of resistor R4 is connected to the positive terminal of LED2, and the other end of resistor R5 is connected to the positive terminal of LED3. The negative terminals of LED2 and LED3 are both connected to the microcontroller module.

[0067] like Figure 6 As shown, in order to alert the testing personnel when a problem occurs in the test results, the microcontroller module is equipped with a buzzer module. The buzzer module is connected to the +5V power output terminal, and the buzzer module will sound an alarm when a problem occurs in the test results.

[0068] like Figure 7 As shown, in order to connect to the programming interface of the equalizer circuit board for programming, the microcontroller module is equipped with a programming port, which is connected to the +5V power output terminal; the microcontroller is connected to the programming interface of the equalizer circuit board through the programming port.

[0069] like Figure 8 As shown, in order to control the start or stop of the equalizer circuit board detection device, the control module includes a start button SW1 and an end button SW2; both the start button SW1 and the end button SW2 are connected to the microcontroller module.

[0070] A capacitor C7 is connected in parallel across the two ends of the start button SW1. One end of capacitor C7 is grounded, and the other end of capacitor C7 is connected to one end of resistor R71. The other end of resistor R71 is connected to the +5V power output terminal.

[0071] A capacitor C6 is connected in parallel across the two ends of the end button SW2. One end of capacitor C6 is grounded, and the other end of capacitor C6 is connected to one end of resistor R70. The other end of resistor R70 is connected to the +5V power output terminal. The start button SW1 and the end button SW2 provide start and end signals respectively.

[0072] In order to acquire voltage signals from multiple circuit test nodes on the equalizer circuit board, the acquisition module includes multiple acquisition resistor modules and multiple amplifier circuit modules corresponding to the acquisition resistor modules.

[0073] like Figure 9 As shown, the acquisition resistor module includes acquisition probe Q1G and acquisition probe Q2G;

[0074] The acquisition probe Q1G is connected to one end of resistor R6, the other end of resistor R6 is connected to the negative terminal of TVS diode D1 and one end of resistor R18, and the positive terminal of TVS diode D1 and the other end of resistor R18 are grounded.

[0075] The acquisition probe Q2G is connected to one end of resistor R7, the other end of resistor R7 is connected to the negative terminal of TVS diode D2 and one end of resistor R19, and the positive terminal of TVS diode D2 and the other end of resistor R19 are grounded.

[0076] like Figure 10 As shown, the amplifier circuit module includes operational amplifier U6.1 and operational amplifier U6.2;

[0077] The third pin of operational amplifier U6.1 is connected to resistor R6, TVS diode D1, and resistor R18;

[0078] The first, second, and eighth pins of the operational amplifier U6.1 are connected together and connected to one end of resistor R77 and the +12V power supply output terminal. The other end of resistor R77 is connected to one end of capacitor C37 and the microcontroller module; the other end of capacitor C37 is grounded.

[0079] The fourth pin of operational amplifier U6.1 is grounded;

[0080] The fifth pin of operational amplifier U6.2 is connected to resistor R7, TVS diode D2, and resistor R19;

[0081] The sixth and seventh pins of the operational amplifier U6.2 are connected together and connected to one end of the resistor R78. The other end of the resistor R78 is connected to one end of the capacitor C38 and the microcontroller module; the other end of the capacitor C38 is grounded.

[0082] like Figure 1 As shown, in order to collect and test the high voltage in the equalizer circuit board, a relay module is also provided between the acquisition module and the circuit test node of the equalizer circuit board. The relay module is connected to the power supply module and the microcontroller module.

[0083] like Figure 11 As shown, the relay module includes a relay RLY1. The first pin of the relay RLY1 is connected to one end of the fuse F1, and the other end of the fuse F1 is connected to the VCC power input terminal.

[0084] A diode D33 is connected in series between the second and fifth pins of relay RLY1, and the cathode of diode D33 is connected to the fifth pin of relay RLY1 and the +12V power output terminal.

[0085] The third pin of relay RLY1 is connected to the TPVCC terminal;

[0086] The second pin of relay RLY1 is connected to the first pin of transistor Q1 and the negative terminal of diode D34. The positive terminal of diode D34 is connected to the second pin of transistor Q1 and grounded. The third pin of transistor Q1 is connected to one end of resistor R75, and the other end of resistor R75 is connected to the microcontroller module.

[0087] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An equalizer circuit board testing device, characterized in that: It includes a microcontroller module, as well as a data acquisition module, a buzzer module, a communication module, a control module, and a power supply module connected to it; The acquisition module, communication module, and control module are all connected to the power supply module; The acquisition module is connected to multiple circuit test nodes on the equalizer circuit board, and the equalizer circuit board is connected to the load module. The microcontroller module stores detection thresholds corresponding to each circuit test node. The microcontroller module receives voltage signals from each circuit test node collected by the acquisition module, judges the voltage signals according to the corresponding detection thresholds, and transmits the judgment results to the display module by the communication module.

2. The equalizer circuit board testing device according to claim 1, characterized in that, The power supply module includes a VCC power input terminal, a +12V power output terminal, a +5V power output terminal, and a TPGND ground terminal. The VCC power input terminal is connected to one end of fuse F2, and the other end of fuse F2 is connected to the positive terminal of diode D38. The negative terminal of diode D38 is connected to one end of capacitor C9, capacitor C26, resistor R2, and the first pin of transistor Q3. The other ends of capacitor C9 and capacitor C26 are grounded and TPGND is grounded. The other end of resistor R2 is connected to the second pin of transistor Q3, the negative terminal of TVS diode D37, the positive terminal of TVS diode D37 to ground, and the TPGND ground terminal. The third pin of transistor Q3 is connected to the +12V power output terminal, the third pin of voltage conversion chip U24, and one end of capacitors C8, C36, C19, C20, C21, C22, C23, C24, C25, and C27. The other ends of capacitors C8, C36, C19, C20, C21, C22, C23, C24, C25, and C27 are grounded and connected to the TPGND ground terminal. The first pin of the voltage conversion chip U24 is grounded and the TPGND ground terminal; The second and fourth pins of the voltage conversion chip U24 are connected, and connected to one end of the +5V power output terminal, capacitors C10, C11, C13, C14, resistors R115, R4, and R5. The other ends of capacitors C10, C11, C13, and C14 are grounded and connected to the TPGND grounding terminal. The other end of resistor R115 is connected to the positive terminal of LED1, and the negative terminal of LED1 is grounded and connected to the TPGND grounding terminal. The other end of resistor R4 is connected to the positive terminal of LED2, and the other end of resistor R5 is connected to the positive terminal of LED3. The negative terminals of LED2 and LED3 are both connected to the microcontroller module.

3. The equalizer circuit board testing device according to claim 2, characterized in that, The microcontroller module is equipped with a buzzer module, which is connected to the +5V power output terminal.

4. The equalizer circuit board testing device according to claim 2, characterized in that, The microcontroller module is equipped with a programming port, which is connected to the +5V power output terminal. The microcontroller is connected to the programming interface of the equalizer circuit board via a programming port.

5. The equalizer circuit board testing device according to claim 2, characterized in that, The control module includes a start button SW1 and an end button SW2; both the start button SW1 and the end button SW2 are connected to the microcontroller module. A capacitor C7 is connected in parallel across the two ends of the start button SW1. One end of capacitor C7 is grounded, and the other end of capacitor C7 is connected to one end of resistor R71. The other end of resistor R71 is connected to the +5V power output terminal. A capacitor C6 is connected in parallel across the two ends of the end button SW2. One end of capacitor C6 is grounded, and the other end of capacitor C6 is connected to one end of resistor R70. The other end of resistor R70 is connected to the +5V power output terminal.

6. The equalizer circuit board testing device according to claim 2, characterized in that, The acquisition module includes multiple acquisition resistor modules and multiple amplifier circuit modules corresponding to the acquisition resistor modules; The resistance acquisition module includes acquisition probe Q1G and acquisition probe Q2G; The acquisition probe Q1G is connected to one end of resistor R6, the other end of resistor R6 is connected to the negative terminal of TVS diode D1 and one end of resistor R18, and the positive terminal of TVS diode D1 and the other end of resistor R18 are grounded. The acquisition probe Q2G is connected to one end of resistor R7, the other end of resistor R7 is connected to the negative terminal of TVS diode D2 and one end of resistor R19, and the positive terminal of TVS diode D2 and the other end of resistor R19 are grounded. The amplifier circuit module includes operational amplifier U6.1 and operational amplifier U6.2; The third pin of operational amplifier U6.1 is connected to resistor R6, TVS diode D1, and resistor R18; The first, second, and eighth pins of the operational amplifier U6.1 are connected together and connected to one end of resistor R77 and the +12V power supply output terminal. The other end of resistor R77 is connected to one end of capacitor C37 and the microcontroller module; the other end of capacitor C37 is grounded. The fourth pin of operational amplifier U6.1 is grounded; The fifth pin of operational amplifier U6.2 is connected to resistor R7, TVS diode D2, and resistor R19; The sixth and seventh pins of the operational amplifier U6.2 are connected together and connected to one end of the resistor R78. The other end of the resistor R78 is connected to one end of the capacitor C38 and the microcontroller module; the other end of the capacitor C38 is grounded.

7. The equalizer circuit board testing device according to claim 2, characterized in that, A relay module is also provided between the acquisition module and the circuit test node of the equalizer circuit board. The relay module is connected to the power supply module and the microcontroller module.

8. The equalizer circuit board testing device according to claim 7, characterized in that, The relay module includes a relay RLY1, the first pin of which is connected to one end of a fuse F1, and the other end of the fuse F1 is connected to the VCC power input terminal. A diode D33 is connected in series between the second and fifth pins of relay RLY1, and the cathode of diode D33 is connected to the fifth pin of relay RLY1 and the +12V power output terminal. The third pin of relay RLY1 is connected to the TPVCC terminal; The second pin of relay RLY1 is connected to the first pin of transistor Q1 and the negative terminal of diode D34. The positive terminal of diode D34 is connected to the second pin of transistor Q1 and grounded. The third pin of transistor Q1 is connected to one end of resistor R75, and the other end of resistor R75 is connected to the microcontroller module.

Images