Coupling Capacitance Abnormality Detection Device and Its Detection Method

Abstract

The present disclosure provides a coupling capacitor abnormality detection device and a detection method thereof. The detection method includes the following steps: providing a first signal measurement circuit and a plurality of wires, the first signal measurement circuit having a ground terminal, a first input terminal, and a second input terminal, wherein two of the plurality of wires are electrically connected to the ground terminal and the first input terminal respectively. Providing a power supply to the first signal measurement circuit to form a first charging voltage between the two wires and a charging reference voltage between the ground terminal and the second input terminal. Judging whether a variation condition occurs between the two wires according to the first charging voltage and the charging reference voltage.

Description

Technical Field

[0001] The present disclosure relates to a coupled capacitor anomaly detection device, and particularly to a detection device that measures electrical parameters to determine whether variations in multiple wires have occurred. Background Art

[0002] The detection of wires on a printed circuit board (PCB) can be roughly divided into optical and electronic methods. Optical wire detection uses a scanning method to find where the wires are defective, and electronic wire detection usually uses a flying probe tester to check all connections. The electronic detection method is more accurate in finding short circuits or open circuits, while the optical method can more easily detect problems with incorrect gaps between conductors.

[0003] In the detection of wire anomalies on an electronic printed circuit board, different methods have been used in patent literature, but most of them use the resistance characteristics between two wires to check whether there is a short circuit or open circuit between these wires.

[0004] In the literature of US Patent No. US8269505B2, a method for locating a short circuit on a printed circuit board is disclosed. Test signals can be injected into different test points on the circuit board. The distance between each test point and the short circuit can be determined according to the time it takes for the signal reflection at the short circuit to propagate back to each test point. The distances between each test point and the short circuit can be used to narrow down the possible location of the short circuit. However, none of the above methods for locating short circuits disclose using energy storage / discharge components and characteristics to detect whether an abnormal condition of a short circuit has occurred.

[0005] In the literature of Chinese Patent Publication No. CN103033521A, a wiring detection method and a wiring detection system are disclosed. The method includes the following steps: establishing a coordinate system and data information for testing based on a gold board in advance, where the data information includes the coordinates of the breakage test points for detecting wiring, the coordinate group of the test points for detecting wiring, the short circuit test points between the wiring and the adjacent wiring, and the preset illumination feedback value for identifying the wiring; according to the coordinate system, the coordinates of the test points, and the preset illumination feedback value, scanning the current wiring to be detected on the circuit board to be detected and determining whether the current wiring to be detected is disconnected. The test points scan the current wiring to be detected to the adjacent wiring to be detected according to the coordinate group of the test points in the coordinate system and the preset illumination feedback value, and determine whether a short circuit occurs between the current wiring to be detected and the adjacent wiring to be detected. However, none of the above wiring detection methods and wiring detection systems disclose using energy storage / discharge components and characteristics to detect whether an abnormal condition of the wiring has occurred.

[0006] In the document of US Patent Publication No. US20040181348A1, a method and device for detecting resistance faults in an electrical conductor are disclosed. The device includes an oscillation signal generator that applies an oscillation signal to the electrical conductor to be measured. The device includes measuring means for measuring the electric potential between the electrical conductor to be measured and a reference node. Such measurement results can be obtained both when the device is disconnected from the electrical conductor to be measured and when the device is connected to the electrical conductor to be measured. A difference in the measured values indicates that the connectivity of the electrical conductor is intact, while no difference indicates the presence of a resistive fault somewhere in the electrical conductor. However, neither the above-mentioned method nor the device for detecting resistance faults in an electrical conductor discloses using the components and characteristics of energy storage / discharge to detect whether an abnormal condition occurs in the electrical conductor.

[0007] In view of the deficiencies of the prior art, it is expected to propose a new detection method and detection device that can use the components and characteristics of energy storage / discharge to detect whether an abnormal condition occurs between the wires in an electronic device. Summary of the Invention

[0008] The present disclosure proposes a coupling capacitance anomaly detection device and its detection method. The detection device includes a reference capacitor confirmed to be normal before testing, and two wires having an equivalent coupling capacitor. At the starting point of the measurement time, a power supply is simultaneously provided to the reference capacitor and the two wires, so that the reference capacitor stores energy, that is, the reference capacitor is charged and forms a reference characteristic curve with a reference charging voltage as the measurement period progresses; at the same time, the equivalent coupling capacitor between the two wires is charged and forms a to-be-tested characteristic curve with a charging voltage as the measurement period progresses. The reference characteristic curve represents the normal state when the normal reference capacitor is charged, and it can be used to compare with the to-be-tested characteristic curve to detect whether an abnormal condition occurs between the two wires.

[0009] If the shape of the to-be-tested characteristic curve is not similar to the shape of the reference characteristic curve, it can be determined that an abnormal condition occurs between the two wires. For example, when the capacitance value of the reference capacitor is greater than the coupling capacitance value between the two wires, applying the same DC voltage to both of them simultaneously will cause the one with the smaller coupling capacitance to charge faster and the one with the larger reference capacitance to charge slower. If during the charging period, the charging voltage of the one that charges faster is lower than the reference charging voltage, it can be known that the to-be-tested characteristic curve is abnormal, and at this time, it can be determined that an abnormal condition occurs between the two wires. The abnormal condition may be a short circuit, an open circuit, a spark generated by a jump connection, a wire defect, etc. between the two wires.

[0010] The multiple wires in the electronic device can be switched by a switch module. Each time of switching, two of the wires can be detected, and then various combinations of two wires are repeatedly detected to complete the detection of whether any abnormal conditions occur to the multiple wires.

[0011] On the other hand, it is also possible not to require a reference capacitor as a standard for comparing the to-be-tested characteristic curve with the reference characteristic curve. The present disclosure utilizes the slope of the to-be-tested characteristic curve to determine whether any abnormal conditions occur between two wires. The slope of the to-be-tested characteristic curve represents the charging rate of the charging voltage. The charging voltage of a normal capacitor always has a positive slope during charging until it reaches the stable charging voltage, and then the slope of the to-be-tested characteristic curve approaches zero. However, the charging voltage of an abnormal capacitor may initially have a positive slope during charging but then become negative, which violates the charging characteristics of a general normal capacitor. Therefore, it can be determined that an abnormal condition has occurred. The above-described determination of the charging characteristics of a normal capacitor and an abnormal capacitor can be applied to an equivalent coupling capacitor having a coupling capacitance value between two wires. Thereby, it can be determined whether any abnormal conditions occur between two wires.

[0012] In addition, to avoid misjudgment caused by the charging voltage and the reference charging voltage being too close during measurement, that is, the to-be-tested characteristic curve is too close to the reference characteristic curve, the present disclosure provides a sensitivity adjustment unit to avoid such a misjudgment situation. Similarly, to avoid misjudgment caused by the slope of the to-be-tested characteristic curve approaching zero and changing between positive and negative values during measurement, the present disclosure also provides a sensitivity adjustment unit to avoid such a misjudgment situation.

[0013] According to the above concept, the present disclosure provides a detection device for detecting an electronic device having a plurality of wires. The detection device includes a switch module, a signal measurement unit, and a control unit. The switch module includes a plurality of groups of switches and has a first output terminal and a second output terminal. Each of the plurality of groups of switches corresponds to each of the plurality of wires and is used to electrically connect each of the plurality of wires to one of the first output terminal and the second output terminal. The signal measurement unit provides power and includes a first signal measurement circuit and an energy storage unit. The first signal measurement circuit has a first input terminal and a second input terminal for receiving the power, and the first input terminal is electrically connected to the first output terminal, and the second output terminal is electrically connected to the ground terminal. The energy storage unit is electrically connected between the second input terminal and the ground terminal, and when the second input terminal receives the power, a charging reference voltage is formed between the second input terminal and the ground terminal. The control unit provides a control signal to the switch module to electrically connect a first wire of the plurality of wires to the first output terminal and electrically connect a second wire of the plurality of wires to the ground terminal. There is a coupling electrical parameter between the first wire and the second wire, wherein: when the switch module receives the power at the first input terminal, it provides an electrical signal to the first input terminal to form a first charging voltage between the first input terminal and the ground terminal, and charges the energy storage unit between the second input terminal and the ground terminal to form the charging reference voltage: the control unit detects the coupling electrical parameter according to the first charging voltage and the first charging reference voltage to determine whether a variation condition occurs in each of the plurality of wires.

[0014] According to the above concept, the present disclosure provides a detection method for detecting an electronic device having a plurality of wires. The detection method includes the following steps: providing a first signal measurement circuit having a ground terminal, a first input terminal, and a second input terminal, wherein two of the plurality of wires are respectively electrically connected to the ground terminal and the first input terminal. Providing power to the first signal measurement circuit to form a first charging voltage between the two wires and a charging reference voltage between the ground terminal and the second input terminal. Judging whether a variation condition occurs between the two wires according to the first charging voltage and the charging reference voltage.

[0015] According to the above concept, the present disclosure provides a coupled capacitor abnormality detection device. The detection device includes multiple groups of switches, a signal measurement unit, and a control unit. The multiple groups of switches are respectively and electrically connected to the multiple wires. The signal measurement unit provides power and includes a first signal measurement circuit and an energy storage unit. The first signal measurement circuit has a first input terminal and a second input terminal for receiving the power. The energy storage unit is electrically connected between the second input terminal and the ground terminal to form a charging reference voltage. The control unit controls two of the multiple groups of switches so that two wires of the multiple wires corresponding to the two groups of switches are respectively electrically connected to the first input terminal and the ground terminal, wherein there is an electrical parameter between the two wires, whereby a first charging voltage is formed between the first input terminal and the ground terminal, and the control unit detects whether a variation condition occurs between the two wires according to the first charging voltage and the charging reference voltage.

[0016] According to the above concept, the present disclosure provides a coupled capacitor abnormality detection device, which includes multiple groups of switches, a signal measurement unit, and a control unit. The multiple groups of switches are respectively and electrically connected to the multiple wires. The signal measurement unit includes a signal measurement circuit. The signal measurement unit provides power, the signal measurement circuit has an input terminal for receiving the power and includes an energy storage rate measurement unit. The control unit controls two of the multiple groups of switches so that two wires of the multiple wires corresponding to the two groups of switches are respectively electrically connected to the first input terminal and the ground terminal, wherein: there is an electrical parameter between the two wires, whereby a charging voltage is formed between the first input terminal and the ground terminal, the energy storage rate measurement unit outputs a measurement signal with a measurement voltage in response to the charging voltage, wherein the measurement voltage changes with the slope of the charging voltage; and the control unit detects whether a variation condition occurs between the two wires according to the slope.

[0017] According to the above concept, the present disclosure provides a detection method for a coupled capacitor abnormality detection device, including the following steps: providing a signal measurement circuit, the signal measurement circuit having an input terminal and a ground terminal, wherein two of the multiple wires are respectively electrically connected to the first input terminal and the ground terminal; providing power to the signal measurement circuit to form a charging voltage between the two wires; outputting a measurement signal with a measurement voltage in response to the charging voltage, wherein the measurement voltage changes with the slope of the charging voltage; and judging whether a variation condition occurs between the two wires according to the slope.

[0018] According to the above concept, the present disclosure provides a coupled capacitor abnormality detection device, which includes a reference capacitor, two wires having an equivalent coupled capacitor, and a signal measurement unit. The signal measurement unit is configured to simultaneously supply power to the reference capacitor and the two wires at a measurement start time, so that the reference capacitor is charged to form a reference characteristic curve with a reference charging voltage over a measurement period, and at the same time, the equivalent coupled capacitor between the two wires is charged to form a characteristic curve to be measured with a charging voltage over the measurement period, wherein the reference characteristic curve is used to compare with the characteristic curve to be measured to detect whether an abnormal condition occurs between the two wires.

[0019] According to the above concept, the present disclosure provides a coupled capacitor abnormality detection device, which includes a measurement unit, a detection unit, and a control unit. The measurement unit supplies power to measure a first electrical parameter and a second electrical parameter between the plurality of wires, and includes: a voltage measurement unit for measuring the first electrical parameter; and a current measurement unit for measuring the second electrical parameter. The detection unit detects the first and second electrical parameters to generate an abnormality trigger signal. The control unit is configured to detect at least one of the following to enable the control unit to determine whether a variation condition of each of the plurality of wires occurs: whether the first electrical parameter increase value of the first electrical parameter detected by the voltage measurement unit within a unit time is less than a reference voltage increase value; whether the first electrical parameter decrease value of the first electrical parameter detected by the voltage measurement unit V5 within each of the consecutive unit times is greater than a reference voltage decrease value, and whether the first total electrical parameter decrease value accumulated and decreased by the first electrical parameter decrease value within consecutive unit times is greater than a reference total voltage decrease value; whether the second electrical parameter increase value of the second electrical parameter detected by the current measurement unit within a unit time is greater than a reference current increase value; whether the second electrical parameter increase value of the second electrical parameter IC5(t) detected by the current measurement unit A5 within each of the consecutive unit times is greater than the reference current increase value, and whether the second total electrical parameter increase value accumulated and increased by the second electrical parameter increase value within consecutive unit times is greater than a reference total current increase value; and whether the abnormality trigger signal detected by the detection unit is greater than an abnormality determination set value.

[0020] For specific embodiments of the present disclosure, please refer to the drawings for a further description of the technical content of the present disclosure. Description of the Drawings

[0021] Figure 1 : Schematic diagram of the coupled capacitor abnormality detection device according to the preferred embodiment of the present disclosure.

[0022] Figure 2A: Schematic diagram of the output waveforms of the first signal measurement circuit and the first signal analysis unit in the preferred embodiment of the present disclosure.

[0023] Figure 2B : Schematic diagram of the waveforms of voltage and measured current in the preferred embodiment of the present disclosure.

[0024] Figure 3 : Schematic diagram of the output waveforms of the second signal measurement circuit and the second signal analysis unit in the preferred embodiment of the present disclosure.

[0025] Figure 4 : Schematic diagram of the detection method for the coupling capacitor abnormality detection device in the preferred embodiment of the present disclosure.

[0026] Figure 5 : Schematic diagram of the coupling capacitor abnormality detection device in the preferred embodiment of the present disclosure.

[0027] Figure 6 : Coupling capacitor abnormality detection device in the preferred embodiment of the present disclosure.

[0028] Figure 7 : Schematic diagram of the detection method for detecting an electronic device having multiple wires in the preferred embodiment of the present disclosure.

[0029] Figure 8 : Schematic diagram of the coupling capacitor abnormality detection device in the preferred embodiment of the present disclosure.

[0030] Figure 9 : Schematic diagram of the detection method for detecting an electronic device having multiple wires in the preferred embodiment of the present disclosure.

[0031] Figure 10 : Schematic diagram of the detection device for detecting an electronic device having multiple wires in the preferred embodiment of the present disclosure.

[0032] Figure 11 : Schematic diagram of detecting the voltage and current of multiple wires in the preferred embodiment of the present disclosure.

[0033] Figure 12 : Schematic diagram of detecting small signals in the preferred embodiment of the present disclosure. Detailed implementation manners

[0034] Please read the following detailed description with reference to the accompanying drawings of the present disclosure, in which the accompanying drawings of the present disclosure are used by way of example to introduce various different embodiments of the present disclosure and to understand how to implement the present disclosure. The embodiments of the present disclosure provide sufficient content for those skilled in the art to implement the embodiments disclosed by the present disclosure or the embodiments derived from the content disclosed by the present disclosure. It should be noted that these embodiments are not mutually exclusive, and some embodiments can be appropriately combined with one or more other embodiments to form new embodiments, that is, the implementation of the present disclosure is not limited to the embodiments disclosed below. In addition, for the sake of simplicity and clarity of illustration, the relevant details will not be overly disclosed in each embodiment. Even if specific details are disclosed, they are only for illustration to enable the reader to understand, and the relevant specific details in each embodiment are not used to limit the disclosure of this case.

[0035] Please refer to Figure 1 , which is a schematic diagram of a detection device 10 for detecting an electronic device 12 having a plurality of wires 120 according to a preferred embodiment of the present disclosure. The detection device 10 includes a switch module 101, a signal measurement unit 102, and a control unit 103. Please refer to Figure 2A , which is a schematic diagram of the output waveforms of a first signal measurement circuit 1021 and a first signal analysis unit 104 according to a preferred embodiment of the present disclosure. Please refer to Figure 2B , which is a schematic diagram of the waveforms of voltage and measured current according to a preferred embodiment of the present disclosure. The vertical axis represents the measured voltage, and the horizontal axis represents the measured current. The voltage detection interval and the corresponding current detection interval can be selected according to the usage requirements. Please refer to Figure 1 and Figures 2A to 2B, the switch module 101 includes multiple groups of switches 1010 and has a first output terminal TPO1 and a second output terminal TPO2. Each of the multiple groups of switches 1011, 1012 corresponds to each of the multiple wires 120 (i.e., NET1, NET2, NET3, NET4, …, NETn) and is used to electrically connect each of the multiple wires 120 to one of the first output terminal TPO1 and the second output terminal TPO2. The signal measurement unit 102 provides a power supply P1 and includes a first signal measurement circuit 1021 and an energy storage unit C2. The first signal measurement circuit 1021 has a first input terminal TPI1 and a second input terminal TPI2 for receiving the power supply P1, and the first input terminal TPI1 is electrically connected to the first output terminal TPO1, and the second output terminal TPO2 is electrically connected to the ground terminal GND. The energy storage unit C2 is electrically connected between the second input terminal TPI2 and the ground terminal GND, and when the second input terminal TPI2 receives the power supply P1, a charging reference voltage VC2(t) is formed between the second input terminal TPI2 and the ground terminal GND. The control unit 103 provides a control signal SCTRL1 to the switch module 101 to electrically connect the first wire NET1 of the multiple wires 120 to the first output terminal TPO1 and electrically connect the second wire NET2 of the multiple wires 120 to the ground terminal GND. There is a coupling electrical parameter PC1 between the first wire NET1 and the second wire NET2, where: when the first input terminal TPI1 of the switch module 101 receives the power supply P1, an electrical signal SC1 is provided to the first input terminal TPI1 to form a first charging voltage VC1(t) between the first input terminal TPI1 and the ground terminal GND, and the energy storage unit C2 is charged between the second input terminal TPI2 and the ground terminal GND to form the charging reference voltage VC2(t); the control unit 103 detects the coupling electrical parameter PC1 according to the first charging voltage VC1(t) and the first charging reference voltage VC2(t) to determine whether a variation condition of each of the multiple wires 120 occurs.

[0036] In any embodiment of the present disclosure, the detection device 10 further includes a voltage measurement unit VT and a current measurement unit CT that can measure the charging current IC1(t) and the reference charging current IC2(t). The voltage measurement unit VT is configured to detect at least one of the following to enable the control unit 103 to determine whether a variation condition of each of the plurality of wires 120 occurs: detecting whether a first voltage increase value VCP1(t) between the first charging voltage VC1(t) and the charging reference voltage VC2(t) within a unit time is less than a reference voltage increase value (not shown, the reference voltage increase value can be adjusted and set by the user according to the situation and stored in the control unit 103 or the storage unit of the detection device 10); and detecting whether a second voltage decrease value VCM1(t) between the first charging voltage VC1(t) and the charging reference voltage VC2(t) within each of the continuous unit times is greater than the reference voltage decrease value VCM1(t), and whether a total voltage decrease value accumulated by the second voltage decrease value VCM1(t) within the continuous unit times is greater than a reference total voltage decrease value (not shown, the reference total voltage decrease value can be adjusted and set by the user according to the situation and stored in the control unit 103 or the storage unit of the detection device 10). The current measurement unit CT is configured to detect at least one of the following to enable the control unit 103 to determine whether a variation condition of each of the plurality of wires 120 occurs; detecting whether a first current increase value IC1P(t) between the first charging current IC1(t) and the charging reference current IC2(t) within a unit time is greater than a reference current increase value (not shown, the reference current increase value can be adjusted and set by the user according to the situation and stored in the control unit 103 or the storage unit of the detection device 10); and detecting whether a first current increase value ICP1(t) between the first charging current IC1(t) and the charging reference current IC2(t) within each of the continuous unit times is greater than the reference current increase value, and whether a total current increase value accumulated by the first current increase value ICP1(t) within the continuous unit times is greater than a reference total current increase value (not shown, the reference total current increase value can be adjusted and set by the user according to the situation and stored in the control unit 103 or the storage unit of the detection device 10).

[0037] In any embodiment of the present disclosure, the electronic device 12 may be a printed circuit board. A coupling capacitor C1 is formed between the first wire NET1 and the second wire NET2. The energy storage unit C2 is a reference capacitor having a reference capacitance value CC2. The coupling electrical parameter PC1 is a coupling capacitance value CC1. The first signal measurement circuit 1021 outputs first measurement signals SM1 and SM2 in response to the first charging voltage VC1(t) and the charging reference voltage VC2(t). The first signal measurement circuit 1021 includes a differential amplifier 1022 having a positive input terminal AI1+ and a negative input terminal AI1-. When the first input terminal TPI1 is the positive input terminal AI1+ and the second input terminal TPI2 is the negative input terminal AI1-, and when the first charging voltage VC1(t) is greater than the charging reference voltage VC2(t) during charging, the control unit 103 determines that the coupling capacitance value CC1 is less than the reference capacitance value CC2. When the first input terminal TPI1 is the negative input terminal AI1- and the second input terminal TPI2 is the positive input terminal AI1+, and when the first charging voltage VC1(t) is less than the charging reference voltage VC2(t) during charging, the control unit 103 determines that the coupling capacitance value CC1 is greater than the reference capacitance value CC2.

[0038] The detection device 10 further includes a first signal analysis unit 104, which receives the first measurement signals SM1 and SM2 from the first signal measurement circuit 1021 and digitizes the first measurement signals SM1 and SM2 to provide the control unit 103 to determine the variation condition. The signal measurement unit 102 measures the first charging voltage VC1(t) to obtain a first charging characteristic curve CUV1, and measures the reference charging voltage VC2(t) to obtain a reference charging characteristic curve CUV2. The first signal analysis unit 104 analyzes the first measurement signals SM1 and SM2 to obtain first difference curves DCUV1 and DCUV2 between the first charging characteristic curve CUV1 and the reference charging characteristic curve CUV2. The control unit 103 determines the variation condition by judging the first difference curves DCUV1 and DCUV2. The variation condition includes a short circuit or an open circuit between two of the plurality of wires 120.

[0039] The first signal analysis unit 104 includes a first sensitivity adjustment unit 1041 and a first digital logic unit 1042. The first sensitivity adjustment unit 1041 is a first comparator, which is similar to the differential amplifier 1022 and has a positive input terminal and a negative input terminal (not shown). Therefore, it can also be divided into two cases. One is that the second reference voltage Vref1 is positive, and the other is that the second reference voltage Vref2 is negative.

[0040] The first sensitivity adjustment unit 1041 receives the first measurement signal SM1 having first measurement voltages VSM1(t), VSM2(t) and second reference voltages Vref1, Verf2, and outputs first analysis signals SA1, SA2 according to the first measurement voltages VSM1(t), VSM2(t) and the second reference voltages Vref1, Verf2, wherein the second reference voltages Vref1, Verf2 are used to adjust the first sensitivity of the first signal measurement circuit 1021. The first digital logic unit 1042 responds to the first analysis signals SM1, SM2 to output first digital signals SD1, SD2 to the control unit 103 for determining the mutation condition. When the first measurement voltages VSM1(t), VSM2(t) of the first measurement signals SM1, SM2 have positive and negative changes as they approach zero, the second reference voltages Vref1, Vref2 are adjusted to reduce the first sensitivity to avoid misjudgment. For example, the second reference voltage Vref1 is increased from 0 volts to a positive voltage to conform to the first embodiment, or the second reference voltage Vref2 is decreased from 0 volts to a negative voltage to conform to the second embodiment, both of which can avoid misjudgment when the first measurement voltages VSM1(t), VSM2(t) have positive and negative changes as they approach 0 volts.

[0041] In Figure 1 it, the power supply P1 and the switch signal SCTRL1 are respectively provided to the first signal measurement circuit 1021 and the switch module 101 at the same time point. From Figure 2AIt can be known that when the rising rate of the first charging voltage VC1(t) is faster than that of the reference charging voltage VC2(t) within the measurement period TM1, the first measurement voltage VSM1 of the first measurement signal SM1 output by the differential amplifier 1022 is always positive, and there will be no negative value. Therefore, the first analysis signal SA1 will reach the positive saturation voltage, and the control unit 103 can determine that the coupling capacitance value CC1 is less than the reference capacitance value CC2. If within the measurement period TM1, after the first charging voltage VC1(t) is greater than the charging reference voltage VC2(t) from the start of measurement and then becomes less than the charging reference voltage VC2(t) within the measurement period TM1, the first measurement voltage VSM1(t) changes from a positive voltage to a negative voltage, indicating that the coupling capacitance value CC1 is abnormal, and the control unit 103 determines that there is an abnormal condition between the two wires NET1 and NET2. When the rising rate of the first charging voltage VC1(t) is slower than that of the reference charging voltage VC2(t) within the measurement period TM1, the first measurement voltage VSM2 of the first measurement signal SM2 output by the differential amplifier 1022 is always negative, and there will be no positive value. Therefore, the first analysis signal SA2 will reach the negative saturation voltage, and the control unit 103 can determine that the coupling capacitance value CC1 is greater than the reference capacitance value CC2. If within the measurement period TM1, after the first charging voltage VC1(t) is less than the charging reference voltage VC2(t) from the start of measurement and then becomes greater than the charging reference voltage VC2(t) within the measurement period TM1, the first measurement voltage VSM1(t) changes from a negative voltage to a positive voltage, indicating that the coupling capacitance value CC1 is abnormal, and the control unit 103 determines that there is an abnormal condition between the two wires NET1 and NET2.

[0042] The above detection method for the two wires NET1 and NET2 can also be repeated for any other two wires among the multiple wires 120. Through the switching of the switch module 101, the detection is carried out until all combinations of two wires are tested.

[0043] Please refer to Figure 3 , which is a schematic diagram of the output waveforms of the second signal measurement circuit 1023 and the second signal analysis unit 106 in the preferred embodiment of the present disclosure. Please combine and refer to Figure 1 and Figure 3, the signal measurement unit 102 further includes a second signal measurement circuit 1023, which includes a charging rate measurement unit 1024, which can be a differentiator. The charging rate measurement unit 1024 outputs a second measurement signal SM3 with a second measurement voltage VSM3(t) in response to the first charging voltage VC1(t), where the second measurement voltage VSM3(t) changes with the slope of the first charging voltage VC1(t), where: when the second measurement voltage VSM3(t) is constantly positive during the measurement period TM1 of one of the pairs of wires (e.g., NET1, NET2) of the plurality of wires 102, the control unit 103 determines that there is no such variation condition for the pair of wires NET1, NET2, where the measurement period TM1 is from the start of the power supply P1 to the period when the second measurement voltage VSM3(t) approaches zero. The power supply P1 is preferably a DC voltage signal, for example, rising to a range of 10 to 400 volts per millisecond, which can be appropriately adjusted according to the test requirements.

[0044] When the second measurement voltage VSM3(t) is negative during the measurement period TM1 of the pair of wires NET1, NET2 of the plurality of wires 102, the control unit 103 determines that the pair of wires has such a variation condition. In Figure 3 The waveform of the second measurement voltage VSM3(t) in shows a large positive value at the beginning, and then slowly decreases and approaches zero, which is the change in the slope of the first charging voltage VC1(t), which represents that the charging rate of the first charging voltage VC1(t) to the pair of wires NET1, NET2 is relatively fast at the beginning, and then slowly slows down until it is charged to a stable specific voltage value.

[0045] The detection device 10 further includes a second signal analysis unit 106, which receives the second measurement signal SM3 from the second signal measurement circuit 1023 and digitizes the second measurement signal SM3 to provide the control unit 103 to determine the variation condition. The second signal analysis unit 106 includes a second sensitivity adjustment unit 1061 and a second digital logic unit 1062. The second sensitivity adjustment unit 1061 is a second comparator, which is similar to the differential amplifier 1022 and has a positive input terminal and a negative input terminal (not shown), so it can also be divided into two cases. One is that the third reference voltage Vref3 is positive, and the other is that the third reference voltage Vref4 is negative.

[0046] The second sensitivity adjustment unit 1061 receives the second measurement signals SM3 and SM4 with the second measurement voltages VSM3(t) and VSM4(t), and the third reference voltages Verf3 and Vref4, and outputs second analysis signals SA3 and SA4 according to the second measurement voltages VSM3(t) and VSM4(t) and the third reference voltages Verf3 and Vref4, wherein the third reference voltages Verf3 and Vref4 are used to adjust the second sensitivity of the second signal measurement circuit 1023. When the second measurement voltages VSM3(t) and VSM4(t) of the second measurement signals SM3 and SM4 change positively and negatively while approaching zero, the third reference voltages Vref3 and Vref4 are adjusted to reduce the second sensitivity to avoid misjudgment. For example, the third reference voltage Vref3 is increased from 0 volts to a positive voltage to conform to the first embodiment, or the third reference voltage Vref4 is decreased from 0 volts to a negative voltage to conform to the second embodiment, both of which can avoid misjudgment when the second measurement voltages VSM3(t) and VSM4(t) change positively and negatively while approaching 0 volts. The second digital logic unit 1062 responds to the second analysis signals SA3 and SA4 to output second digital signals SD3 and SD4 to the control unit 103 for judging the mutation condition.

[0047] In Figure 1 it, the power supply P1 and the switch signal SCTRL1 are respectively provided to the second signal measurement circuit 1023 and the switch module 101 at the same time point. From Figure 3 it can be seen that when the rising rate of the first charging voltage VC1(t) is within the measurement period TM1, the first measurement voltage VSM3(t) of the second measurement signal SM3 output by the charging rate measurement unit 1024 is always positive and there will be no negative value. Therefore, the second analysis signal SA3 will reach the positive saturation voltage, and the control unit 103 can judge that the characteristic reflecting the coupling capacitance value CC1 is the characteristic of a general normal capacitance value, and judge that there is no abnormal condition between the two wires. If during the measurement period TM1, the first measurement voltage VSM1(t) changes from a positive voltage to a negative voltage, it means that the coupling capacitance value CC1 is abnormal, and the control unit 103 judges that there is an abnormal condition between the two wires NET1 and NET2.

[0048] Please refer to Figure 4, which is a schematic diagram of the detection method S10 for the coupling capacitor abnormality detection device 10 according to a preferred embodiment of the present disclosure. The detection method S10 includes the following steps: Step S101, providing a first signal measurement circuit 1021 and a plurality of wires 120. The first signal measurement circuit 1021 has a ground terminal GND, a first input terminal TPI1, and a second input terminal TPI2. Two of the plurality of wires 120, namely NET1 and NET2, are respectively electrically connected to the ground terminal GND and the first input terminal TPI1. Step S102, providing a power supply P1 to the first signal measurement circuit 1021 to form a first charging voltage VC1(t) between the two wires NET1 and NET2, and forming a charging reference voltage VC2(t) between the ground terminal GND and the second input terminal TPI2. Step S103, judging whether a variation occurs between the two wires NET1 and NET2 according to the first charging voltage VC1(t) and the charging reference voltage VC2(t).

[0049] In any embodiment of the present disclosure, the electronic device 10 is a printed circuit board. The second input terminal TPI2 is electrically connected to the energy storage unit C2. The energy storage unit C2 is a reference capacitor having a reference capacitance value CC2, and forms the charging reference voltage CC2 in the reference capacitor when receiving the power supply P1. The coupled electrical parameter PC1 is the coupling capacitance value CC1. The first signal measurement circuit 1021 outputs first measurement signals SM1 and SM2 in response to the first charging voltage VC1(t) and the charging reference voltage VC2(t). The first signal measurement circuit 1021 includes a differential amplifier 1022 having a positive input terminal AI1+ and a negative input terminal AI1-. The detection method S10 further includes the following steps: when the first input terminal TPI1 is the positive input terminal AI1+ and the second input terminal TPI2 is the negative input terminal AI1-, and when the first charging voltage VC1(t) is greater than the charging reference voltage VC2(t) during charging, the control unit 103 determines that the coupling capacitance value CC1 is less than the reference capacitance value CC2; and when the first input terminal TPI1 is the negative input terminal AI1- and the second input terminal TPI2 is the positive input terminal AI1+, and when the first charging voltage VC1(t) is less than the charging reference voltage VC2(t) during charging, the control unit 103 determines that the coupling capacitance value CC1 is greater than the reference capacitance value CC2. The variation condition includes a short circuit or an open circuit of any two of the plurality of wires. The detection method S10 further includes the following steps: receiving the first measurement signals SM1 and SM2 having first measurement voltages VSM1(t) and VSM2(t) and second reference voltages Vref1 and Vref2, and outputting first analysis signals SA1 and SA2 according to the first measurement voltages VSM1(t) and VSM2(t) and the second reference voltages Vref1 and Vref2, wherein the second reference voltages Vref1 and Vref2 are used to adjust the first sensitivity of the first signal measurement circuit 1021; and outputting first digital signals SD1 and SD2 to the control unit 103 in response to the first analysis signals SA1 and SA2 for determining the variation condition.

[0050] In any embodiment of the present disclosure, the detection method S10 further includes a detection method for the variation condition of the plurality of wires 102, which includes the following steps: outputting second measurement signals SM3 and SM4 with second measurement voltages VSM3(t) and VSM4(t) in response to the first charging voltage VC1(t), where the second measurement voltages VSM3(t) and VSM4(t) change with the slope of the first charging voltage VC1(t); when the second measurement voltages VSM3(t) and VSM4(t) are constantly positive during the measurement period TM2 of a pair of wires NET1 and NET2 among the plurality of wires 102, it is determined that there is no variation condition for the pair of wires NET1 and NET2, where the measurement period TM1 is the period from the start of the power supply P1 to when the second measurement voltages VSM3(t) and VSM4(t) approach zero; and when the second measurement voltages VSM3(t) and VSM4(t) are negative during the measurement period TM1 of the pair of wires NET1 and NET2 among the plurality of wires 102, it is determined that the pair of wires NET1 and NET2 has the variation condition. The detection method S10 further includes a sensitivity adjustment method, which includes the following steps: receiving the second measurement signals SM3 and SM4 with the second measurement voltages VSM3(t) and VSM4(t) and third reference voltages Vref3 and Vref4, and outputting second analysis signals SA3 and SA4 according to the second measurement voltages VSM3(t) and VSM4(t) and the third reference voltages Vref3 and Vref4, where the third reference voltages Vref3 and Vref4 are used to adjust the second sensitivity of the second signal measurement circuit 1023. The detection method S10 further includes a detection method for the variation condition of the plurality of wires 102, which includes the following steps: when the difference between the second measurement voltages VSM3(t) and VSM4(t) and the third reference voltages Vref3 and Vref4 is constantly positive during the measurement period TM1 of a pair of wires NET1 and NET2 among the plurality of wires 102, it is determined that there is no variation condition for the pair of wires NET1 and NET2, where the measurement period TM1 is the period from the start of the power supply P1 to when the second measurement voltages VSM3(t) and VSM4(t) approach zero; and when the difference between the second measurement voltages VSM3(t) and VSM4(t) and the third reference voltages Vref3 and Vref4 is negative during the measurement period TM1 of the pair of wires NET1 and NET2 among the plurality of wires 102, it is determined that the pair of wires NET1 and NET2 has the variation condition. The detection method S10 further includes the following steps: outputting second digital signals SD3 and SD4 to the control unit 103 in response to the second analysis signals SA3 and SA4 for determining the variation condition.

[0051] Please refer to Figure 5 , which is a schematic diagram of a detection device 20 for detecting an electronic device 22 having a plurality of wires 220 according to a preferred embodiment of the present disclosure. The detection device 20 includes a plurality of groups of switches 2010, a signal measurement unit 202, and a control unit 203. The plurality of groups of switches 2010 are respectively electrically connected to the plurality of wires 220. The signal measurement unit 202 provides a power supply P2 and includes a first signal measurement circuit 2021 and an energy storage unit C4. The first signal measurement circuit 2021 has a first input terminal TPI3 and a second input terminal TPI4 for receiving the power supply P2. The energy storage unit C4 is electrically connected between the second input terminal TPI3 and the ground terminal GND to form a charging reference voltage VC4(t). The control unit 203 controls two of the plurality of groups of switches 2010 so that two wires NET1', NET2' of the plurality of wires 220 corresponding to two groups of switches 2011, 2012 are respectively electrically connected to the first input terminal TPI3 and the ground terminal GND, where there is an electrical parameter PC2 between the two wires NET1', NET2', thereby forming a first charging voltage VC3(t) between the first input terminal TPI3 and the ground terminal GND, and the control unit 103 detects whether a variation occurs between the two wires NET1', NET2' according to the first charging voltage VC3(t) and the charging reference voltage VC4(t).

[0052] In Figure 5 the components in the detection device 20 can also be used in Figure 1 the components of the detection device 10 in Figure 1 , for example, the first signal measurement circuit 2021 can correspond to the first signal measurement circuit 1021. The detection device 20 further includes a second signal measurement circuit (not shown), which can also be used in Figure 1 the second signal measurement circuit 1023 in

[0053] Please refer to Figure 6, which is a detection device 30 for detecting an electronic device 32 having a plurality of wires 320 according to a preferred embodiment of the present disclosure, and includes a plurality of groups of switches 3010, a signal measurement unit 302, and a control unit 303. The plurality of groups of switches 3010 are respectively electrically connected to the plurality of wires 320. The signal measurement unit 302 provides a power supply P3 and includes a signal measurement circuit 3023 and a control unit 303. The signal measurement circuit 3023 has an input terminal TPI5 for receiving the power supply P3 and includes an energy storage rate measurement unit 3024. The control unit 303 controls two of the plurality of groups of switches 3010 so that two wires NET1”, NET2” of the plurality of wires 320 corresponding to two groups of switches 3011, 3012 are respectively electrically connected to the first input terminal TPI5 and the ground terminal GND, where: there is an electrical parameter PC3 between the two wires NET1”, NET2”, whereby a charging voltage VC5(t) is formed between the first input terminal TPI5 and the ground terminal GND, and the energy storage rate measurement unit 3024 outputs a measurement signal SM5 having a measurement voltage VSM5(t) in response to the charging voltage VC5(t), where the measurement voltage VSM5(t) changes with the slope of the charging voltage VC5(t). The control unit 303 detects whether a variation occurs between the two wires NET1”, NET2” according to the slope.

[0054] In Figure 6 the components in the detection device 30 can also be used in Figure 1 the components of the detection device 10. For example, the signal measurement circuit 3023 can correspond to the second signal measurement circuit 1023. The control unit 303 provides a control signal SCTRL3 to control each of the plurality of groups of switches 3011, 3012 and receives a digital signal SD6 to determine whether a variation occurs between the two wires NET1”, NET2”. Therefore, it will not be described in detail.

[0055] Please refer to Figure 7, which is a schematic diagram of the detection method S30 for detecting an electronic device 32 having a plurality of wires 320 according to a preferred embodiment of the present disclosure. The detection method S30 includes the following steps: Step S301, providing a signal measurement circuit 3023, the signal measurement circuit 3023 having an input terminal TPI5 and a ground terminal GND, wherein two of the plurality of wires 320, namely "NET1" and "NET2", are electrically connected to the first input terminal TPI5 and the ground terminal GND respectively. Step S302, providing a power supply P3 to the signal measurement circuit 3023 to form a charging voltage VC5(t) between the two wires "NET1" and "NET2". Step S303, outputting a measurement signal SM5 having a measurement voltage VSM5(t) in response to the charging voltage VC5(t), wherein the measurement voltage VSM5(t) changes with the slope of the charging voltage VC5(t). Step S304, judging whether a variation condition occurs between the two wires "NET1" and "NET2" according to the slope.

[0056] In Figure 7 the detection method S30 can also further include the detection method for the variation condition of the plurality of wires 120 and the sensitivity adjustment method as described above, which will not be elaborated here.

[0057] Please refer to Figure 8 , which is a schematic diagram of the detection device 40 for detecting an electronic device 42 having a plurality of wires 420 according to a preferred embodiment of the present disclosure. The detection device 40 includes a reference capacitor C8, two wires 421 and 422 having an equivalent coupling capacitor C7, and a signal measurement unit 402. The signal measurement unit 402 is configured to simultaneously provide a power supply P4 to the reference capacitor C8 and the two wires 421 and 422 at the starting point of the measurement time, so that the reference capacitor C8 is charged to form a reference characteristic curve having a reference charging voltage along with the measurement period, and at the same time, the equivalent coupling capacitor C7 between the two wires 421 and 422 is charged to form a characteristic curve to be measured having a charging voltage along with the measurement period, wherein the reference characteristic curve is used to compare with the characteristic curve to be measured to detect whether an abnormal condition occurs between the two wires 421 and 422.

[0058] In any preferred embodiment of the present disclosure, the electronic device 40 is a printed circuit board. Please refer to Figure 1 , Figure 2, the signal measurement unit 102 is configured to form the reference characteristic curve CUV2 of the reference charging voltage VC2(t) during the measurement period, and at the same time, the equivalent coupling capacitor C1 between the two wires 421 and 422 is charged to form a characteristic curve to be measured CUV1 having a charging voltage VC1(t) along with the measurement period.

[0059] Please refer to Figure 9 , which is a schematic diagram of the detection method S40 for detecting the electronic device 12 having a plurality of wires 120 according to a preferred embodiment of the present disclosure. Please also refer to Figure 1 , Figures 2A to 2B , and Figure 9 . The detection method S40 includes: S401, providing a first signal measurement circuit 1021 and a plurality of wires 120, the first signal measurement circuit 1021 having a ground terminal GND, a first input terminal TPI1, and a second input terminal TPI2, wherein two of the plurality of wires 120 are electrically connected to the ground terminal GND and the first input terminal TPI1 respectively. Step S402, providing a power supply P1 to the first signal measurement circuit 1021 to form a first charging voltage VC1(t) and a first charging current IC1(t) between the two wires, and forming a charging reference voltage VC2(t) and a charging reference current IC2(t) between the ground terminal GND and the second input terminal TPI2. Step S403, when at least one of the following conditions is met, it is determined that a variation occurs between the two wires: Condition 1, when it is detected that the first voltage increase value VCP1(t) between the first charging voltage VC1(t) and the charging reference voltage VC2(t) within a unit time is less than the reference voltage increase value; Condition 2, when it is detected that the first voltage decrease value VCM1(t) between the first charging voltage VC1(t) and the charging reference voltage VC2(t) within each of the consecutive unit times is greater than the reference voltage decrease value, and the total voltage decrease value accumulated by the first voltage decrease value VCM1(t) within the consecutive unit times is greater than the reference total voltage decrease value; Condition 3, when it is detected that the first current increase value ICP(t) between the first charging current IC1(t) and the charging reference current IC2(t) within a unit time is greater than the reference current increase value; and Condition 4, when it is detected that the first current increase value ICP1(t) between the first charging current IC1(t) and the charging reference current IC2(t) within each of the consecutive unit times is greater than the reference current increase value, and the total current increase value accumulated by the first current increase value ICP1(t) within the consecutive unit times is greater than the reference total current increase value.

[0060] Please refer to Figure 10 , which is a schematic diagram of the detection device 50 for detecting the electronic device 52 having a plurality of wires 520 according to a preferred embodiment of the present disclosure. Please refer to Figure 11 , which is a schematic diagram of detecting the voltage and current of a plurality of wires 520 according to a preferred embodiment of the present disclosure. Please refer to Figure 12 , which is a schematic diagram of detecting small signals according to a preferred embodiment of the present disclosure. Please refer to them togetherFigure 10 , Figure 11 , and Figure 12 , the detection device 50 includes a measurement unit 502, a detection unit 503, and a control unit 505. The measurement unit 502 provides a power supply P5 to measure a first electrical parameter VC5(t) and a second electrical parameter IC5(t) between the plurality of wires 520, and includes: a voltage measurement unit V5 that measures the first electrical parameter VC5(t); and a current measurement unit A5 that measures the second electrical parameter IC5(t). The detection unit 503 detects the first and second electrical parameters VC5(t), IC5(t) to generate an abnormal trigger signal SST1. The control unit 505 is configured to detect at least one of the following, so that the control unit 505 determines whether a variation condition of each of the plurality of wires 520 occurs: whether the first electrical parameter increase value VCP5(t) of the first electrical parameter VC5(t) detected by the voltage measurement unit V5 within a unit time is less than a reference voltage increase value (not shown, which can be stored in the control unit 505 and can be set and adjusted by the user according to the test requirements); whether the first electrical parameter decrease value VCM5(t) of the first electrical parameter VC5(t) detected by the voltage measurement unit V5 within each of the consecutive unit times is greater than a reference voltage decrease value (not shown, which can be stored in the control unit 505 and can be set and adjusted by the user according to the test requirements), and whether the first total electrical parameter decrease value (such as VCM5(t1)+VCM5(t2)+…+VCM5(tn)) accumulated and decreased by the first electrical parameter decrease value VCM5(t) within consecutive unit times is greater than a reference total voltage decrease value (not shown, which can be stored in the control unit 505 and can be set and adjusted by the user according to the test requirements); whether the second electrical parameter increase value ICP5(t) of the second electrical parameter IC5(t) detected by the current measurement unit A5 within a unit time is greater than a reference current increase value (not shown, which can be stored in the control unit 505 and can be set and adjusted by the user according to the test requirements); whether the second electrical parameter increase values of the second electrical parameter IC5(t) detected by the current measurement unit A5 within each of the consecutive unit times are greater than the reference current increase value, and whether the second total electrical parameter increase value (such as ICP5(t1)+ICP5(t2)+…+ICP5(tn)) accumulated and increased by the second electrical parameter increase value within consecutive unit times is greater than a reference total current increase value (not shown, which can be stored in the control unit 505 and can be set and adjusted by the user according to the test requirements); and whether the abnormal trigger signal SST1 detected by the detection unit 503 is greater than an abnormal judgment setting value (not shown, which can be stored in the control unit 505 and can be set and adjusted by the user according to the test requirements).

[0061] In Figure 10 the control unit 505 can control the startup time of the power supply P5, as well as the on and off times of the multiple sets of switches 5010, to test the electrical state between any two wires and provide an electrical signal SC5 for measurement. The power supply P5 can provide an appropriate detection voltage for detection through the resistor R5. The electrical signal SC5 can be a large-signal voltage or current signal. After passing through capacitors C6 and C7 with specific capacitance values selected, a small signal SC6 can be filtered out to detect whether there is an abnormality in the small signal SC6, and its resistance value is, for example, in the range of about 0 to 1 microfarad. The small signal SC6 can be the filtered charging voltage VC5(t). The second input terminal TPI6 can be coupled to GND, and the resistor R6 is electrically connected between the first and the second input terminals TPI5 and TPI6, forming a differential amplifier with the amplifier 5031, and its resistance value is, for example, in the range of about 1 to 1 Mega ohm.

[0062] In any embodiment of the present disclosure, the measurement unit 502 is a standard abnormal signal measurement unit, and the detection unit 503 is a minute abnormal signal detection unit. The first electrical parameter VC5(t) is the charging voltage, and the second electrical parameter IC5(t) is the charging current. The increase value VCP5(t) of the first electrical parameter is the increase value of the charging voltage, and the increase value ICP5(t) of the second electrical parameter is the increase value of the charging current. The decrease value VCM5(t) of the first electrical parameter is the decrease value of the charging voltage, and the decrease value ICM5(t) of the second electrical parameter is the decrease value of the charging current. The total decrease value of the first total electrical parameter (e.g., VCM5(t1)+VCM5(t2)+…+VCM5(tn)) is the total voltage decrease value, and the total increase value of the second total electrical parameter (e.g., ICP5(t1)+ICP5(t2)+…+ICP5(tn)) is the current increase value. The detection device 50 further includes a switch module 501 and an equivalent energy storage unit C5. The switch module 501 includes multiple groups of switches 5010 and has a first output terminal TPO3 and a second output terminal TPO4. Each of the multiple groups of switches 5010 corresponds to each of the multiple wires 520 and is used to electrically connect each of the multiple wires 520 to one of the first output terminal TPO3 and the second output terminal TPO4. The equivalent energy storage unit C5 is coupled between the first output terminal TPO3 and the second output terminal TPO4 and forms the charging voltage between the two output terminals. The control unit 505 provides a control signal SCRL2 to the switch module 501 to electrically connect the first wire NEW1 of the multiple wires 520 to the first output terminal TPO3 and electrically connect the second wire NET2 of the multiple wires 520 to the second output terminal TPO4. The detection unit 503 receives the charging voltage and has a first input terminal TPI5 and a second input terminal TPI6. The first input terminal TPI5 is coupled to the first output terminal TPO3, and the second output terminal TPO4 is coupled to the second input terminal TPI6. The control unit 505 includes: a power supply and switch control unit 5051 configured to control the operation time of the power supply and the switch module; a standard abnormal signal determination unit 5052 that records and determines whether the first and second electrical parameters meet the first detection standard value; and a minute abnormal determination unit 5053 that records and determines whether the first and second electrical parameters meet the second detection standard value. The detection unit 503 includes: an amplifier 5031 that receives the charging voltage to output an amplified signal; and a charging rate measurement unit 5032 (e.g., a differentiator or an integrator) that outputs a minute abnormal trigger signal SST1 in response to the amplified signal. The detection device 50 further includes an analog-to-digital converter 504 configured to convert the minute abnormal trigger signal SST1 into a digital signal SD7.The standard anomaly signal determination unit 5052 receives the digital signal SD7 to determine whether the first and second electrical parameters VC5(t) and IC5(t) meet the first detection standard value STD1. The minor anomaly determination unit 5053 receives the minor anomaly trigger signal SST1 to determine whether the first and second electrical parameters VC5(t) and IC5(t) meet the second detection standard value STD2.

[0063] Most of the variations and other embodiments of the present disclosure presented herein will be beneficial for those skilled in the art to understand with the teachings presented in the above description and related drawings. Therefore, it should be understood that the present disclosure is not limited to the specific embodiments disclosed, and the variations and other embodiments are intended to be included within the scope of the following claims.

[0064] Symbol Explanation

[0065] 10, 20, 30, 40: Detection devices 101, 501: Switch modules

[0066] 102, 202, 302, 402: Signal measurement units 1010, 2010, 3010: Multiple groups of switches 12, 22, 32, 52: Electronic devices 120, 220, 320, 420: Multiple wires NET1, NET1’, NET1”: First wire NET2, NET2’, NET2”: Second wire NET1, NET2, NET3, NET4, …, 1011, 1012, 2011, 2012, 3011, 3012, 5011, NETn: Each of the multiple wires 5012: Each of the multiple groups of switches

[0067] 103, 203, 303: Control units SC1, SC5: Electrical signals

[0068] TPO1: First output terminal SCTRL1, SCTRL2: Control signals TPO2: Second output terminal TPI1, TPI3: First input terminals P1, P2, P3: Power supplies TPI2, TPI4: Second input terminals

[0069] 1021, 2021: First signal measurement circuits 1023, 3023: Second signal measurement circuits 1022, 5031: Differential amplifiers 1024, 3024, 5032: Charge rate measurement units C1, C3: Coupling capacitors C2, C4: Energy storage units

[0070] PC1: Coupling electrical parameters PC2, PC3: Electrical parameters

[0071] CC1: Coupling capacitance value CC2: Reference capacitance value

[0072] VC1(t), VC3(t), VC5(t): First charging voltage; VC2(t), VC4(t): Reference charging voltage

[0073] Voltage

[0074] SM1, SM2: First measurement signal; SM3, SM4: Second measurement signal; VSM1(t), VSM2(t): First measurement voltage; VSM3(t), VSM4(t): Second measurement voltage; AI1+: Positive input terminal; AI1-: Negative input terminal

[0075] Vref1, Vref2: Second reference voltage; Vref3, Vref4: Third reference voltage; CUV1: First charging characteristic curve; CUV2: Reference charging characteristic curve; DCUV1, DCUV2: First difference curve; 104: First signal analysis unit

[0076] 1041: First sensitivity regulation unit; 106: Second signal analysis unit

[0077] 1042: First digital logic unit; 1061: Second sensitivity regulation unit; SA1, SA2: First analysis signal; 1062: Second digital logic unit; SA3, SA4: Second analysis signal; TPI5: Input terminal

[0078] SD1, SD2: First digital signal; SD3, SD4: Second digital signal; SM5: Measurement signal; VSM5(t): Measurement voltage

[0079] 421, 422: Two wires; VT: Voltage measurement module

[0080] IC2(t): Reference charging current; CT: Current measurement module

[0081] 502: Measurement unit; IC1(t): First charging current

[0082] 503: Detection unit; 504: Simulation digital conversion unit

[0083] 5051: Power supply and switch control unit; 5052: Standard abnormal signal judgment unit

[0084] SD7: Digital signal; 5053: Tiny abnormal signal judgment unit

[0085] SST1: Tiny abnormal trigger signal

Claims

1. A coupling capacitance anomaly detection device for detecting an electronic device, comprising: A switch module, including multiple groups of switches, and having a first output terminal and a second output terminal. Each of the multiple groups of switches corresponds to each of the multiple wires of multiple wires, and is used to electrically connect each of the multiple wires to one of the first output terminal and the second output terminal; A signal measurement unit, providing power, and comprising: A first signal measurement circuit, having a first input terminal and a second input terminal for receiving the power supply, and the first input terminal is electrically connected to the first output terminal, and the second output terminal is electrically connected to the ground terminal; And An energy storage unit, electrically connected between the second input terminal and the ground terminal, and when the second input terminal receives the power supply, a charging reference voltage is formed between the second input terminal and the ground terminal; And A control unit, providing a control signal to the switch module to electrically connect the first wire of the multiple wires to the first output terminal, and electrically connect the second wire of the multiple wires to the ground terminal. There is a coupling electrical parameter between the first wire and the second wire, wherein: When the switch module receives the power supply at the first input terminal, it provides an electrical signal to the first input terminal to form a first charging voltage between the first input terminal and the ground terminal, and charges the energy storage unit between the second input terminal and the ground terminal to form the charging reference voltage; The detection device further comprises: A voltage measurement unit, configured to detect at least one of the following, so that the control unit determines whether a variation condition of each of the multiple wires occurs: Detecting whether a first voltage increase value between the first charging voltage and the charging reference voltage within a unit time is less than a reference voltage increase value; and Detecting whether a first voltage decrease value between the first charging voltage and the charging reference voltage within each of the continuous unit times is greater than a reference voltage decrease value, and whether a total voltage decrease value accumulated and decreased by the first voltage decrease value within the continuous unit times is greater than a reference total voltage decrease value; and A current measurement unit, configured to detect at least one of the following, so that the control unit determines whether a variation condition of each of the multiple wires occurs: Detecting whether a first current increase value between the first charging current and the charging reference current within a unit time is greater than a reference current increase value; and Detecting whether the first current increase value between the first charging current and the charging reference current within each of the continuous unit times is greater than the reference current increase value, and whether a total current increase value accumulated and increased by the first current increase value within the continuous unit times is greater than a reference total current increase value, wherein: The detection device further comprises a first signal analysis unit, which receives a first measurement signal from the first signal measurement circuit and digitizes the first measurement signal to provide the control unit to judge the variation condition; The signal measurement unit obtains a first charging characteristic curve by measuring the first charging voltage, and obtains a reference charging characteristic curve by measuring the charging reference voltage. The first signal analysis unit analyzes the first measurement signal to obtain a first difference curve between the first charging characteristic curve and the reference charging characteristic curve. The control unit judges the variation condition by judging the first difference curve.

2. The detection device according to claim 1, wherein: The electronic device is a printed circuit board; A coupling capacitor is formed between the first wire and the second wire; The energy storage unit is a capacitor; The coupling electrical parameter is a coupling capacitance value; The first signal measurement circuit outputs the first measurement signal in response to the first charging voltage and the charging reference voltage; The first signal measurement circuit includes a differential amplifier having a positive input terminal and a negative input terminal. When the first input terminal is the positive input terminal and the second input terminal is the negative input terminal, and when the first charging voltage is greater than the charging reference voltage during charging, the control unit judges that the coupling capacitance value is less than the reference capacitance value; When the first input terminal is the negative input terminal and the second input terminal is the positive input terminal, and when the first charging voltage is less than the charging reference voltage during charging, the control unit judges that the coupling capacitance value is greater than the reference capacitance value; The variation condition includes a short circuit or an open circuit between two of the plurality of wires; The first signal analysis unit includes: A first sensitivity adjustment unit, which receives the first measurement signal having a first measurement voltage and a second reference voltage, and outputs a first analysis signal according to the first measurement voltage and the second reference voltage, wherein the second reference voltage is used to adjust the first sensitivity of the first signal measurement circuit; And A first digital logic unit, which responds to the first analysis signal to output a first digital signal to the control unit for judging the variation condition; When the first measurement voltage of the first measurement signal has positive and negative changes as it approaches zero, the second reference voltage is adjusted to reduce the first sensitivity to avoid misjudgment; And The first sensitivity adjustment unit is a first comparator.

3. The detection device according to claim 1, wherein: The signal measurement unit further includes a second signal measurement circuit, which includes: A charging rate measurement unit, which outputs a second measurement signal having a second measurement voltage in response to the first charging voltage, wherein the second measurement voltage changes with the slope of the first charging voltage, wherein: When the second measurement voltage is constantly positive during the measurement of a pair of the plurality of wires, the control unit judges that there is no variation condition for the pair of wires, wherein the measurement period is from the start of the power supply to the period when the second measurement voltage approaches zero; and When the second measurement voltage is negative during the measurement of the pair of the plurality of wires, the control unit judges that the pair of wires has the variation condition; The detection device further includes a second signal analysis unit, which receives the second measurement signal from the second signal measurement circuit and digitizes the second measurement signal to provide the control unit for judging the variation condition; The second signal analysis unit includes: A second sensitivity adjustment unit, which receives the second measurement signal having the second measurement voltage and a third reference voltage, and outputs a second analysis signal according to the second measurement voltage and the third reference voltage, wherein the third reference voltage is used to adjust the second sensitivity of the second signal measurement circuit; and A second digital logic unit, which responds to the second analysis signal to output a second digital signal to the control unit for judging the variation condition; When the second measurement voltage of the second measurement signal has positive and negative changes as it approaches zero, adjust the third reference voltage to reduce the second sensitivity to avoid misjudgment; The power supply and the switch signal are respectively provided to the first signal measurement circuit and the switch module at the same time point; and The second sensitivity adjustment unit is a second comparator.

4. A detection method for a coupling capacitance abnormality detection device for detecting an electronic device, comprising the following steps: Provide a first signal measurement circuit and a plurality of wires. The first signal measurement circuit has a ground terminal, a first input terminal and a second input terminal. Two of the plurality of wires are respectively electrically connected to the ground terminal and the first input terminal, and there is a coupling electrical parameter between the two wires; Provide a power supply to the first signal measurement circuit to form a first charging voltage and a first charging current between the two wires, and form a charging reference voltage and a charging reference current between the ground terminal and the second input terminal; And When at least one of the following conditions is met, it is determined that a variation condition has occurred between the two wires: Condition 1, when it is detected that the first voltage increase value between the first charging voltage and the charging reference voltage within a unit time is less than the reference voltage increase value; Condition 2, when it is detected that the first voltage decrease value between the first charging voltage and the charging reference voltage within each of the continuous unit times is greater than the reference voltage decrease value, and the total voltage decrease value accumulated and decreased by the first voltage decrease value within the continuous unit times is greater than the reference total voltage decrease value; Condition 3, when it is detected that the first current increase value between the first charging current and the charging reference current within a unit time is greater than the reference current increase value; And Condition 4, when it is detected that the first current increase value between the first charging current and the charging reference current within each of the continuous unit times is greater than the reference current increase value, and the total current increase value accumulated and increased by the first current increase value within the continuous unit times is greater than the reference total current increase value, wherein: The detection device further includes a first signal analysis unit, which receives the first measurement signal from the first signal measurement circuit and digitizes the first measurement signal to provide the control unit for judging the variation condition; The detection device further includes a signal measurement unit, which measures the first charging voltage to obtain a first charging characteristic curve, and measures the charging reference voltage to obtain a reference charging characteristic curve. The first signal analysis unit analyzes the first measurement signal to obtain a first difference curve between the first charging characteristic curve and the reference charging characteristic curve. The control unit judges the variation condition by judging the first difference curve.

5. The detection method according to claim 4, wherein: The electronic device is a printed circuit board; A coupling capacitor is formed between the first wire and the second wire; The second input terminal is electrically connected to an energy storage unit, which is a reference capacitor with a reference capacitance value, and the charging reference voltage is formed on the reference capacitor when receiving the power supply; The coupling electrical parameter is a coupling capacitance value; The first signal measurement circuit outputs a first measurement signal in response to the first charging voltage and the charging reference voltage; The first signal measurement circuit includes a differential amplifier having a positive input terminal and a negative input terminal; The detection method further includes the following steps: When the first input terminal is the positive input terminal and the second input terminal is the negative input terminal, and when the first charging voltage is greater than the charging reference voltage during charging, the control unit judges that the coupling capacitance value is less than the reference capacitance value; And When the first input terminal is the negative input terminal and the second input terminal is the positive input terminal, and when the first charging voltage is less than the charging reference voltage during charging, the control unit judges that the coupling capacitance value is greater than the reference capacitance value; The variation condition includes a short circuit or an open circuit between two of the plurality of wires; The detection method further includes the following steps: Receiving the first measurement signal having a first measurement voltage and a second reference voltage, and outputting a first analysis signal according to the first measurement voltage and the second reference voltage, wherein the second reference voltage is used to adjust the first sensitivity of the first signal measurement circuit; and Responding to the first analysis signal to output a first digital signal to the control unit for judging the variation condition.

6. The detection method according to claim 4, wherein: The detection method further includes a detection method for the variation condition of the plurality of wires, which includes the following steps: Outputting a second measurement signal having a second measurement voltage in response to the first charging voltage, wherein the second measurement voltage changes with the slope of the first charging voltage; When the second measurement voltage is constantly positive during the measurement of a pair of the plurality of wires, it is judged that there is no variation condition for the pair of wires, wherein the measurement period is from the start of the power supply to the period when the second measurement voltage approaches zero; And When the second measurement voltage is negative during the measurement of the pair of the plurality of wires, it is judged that the pair of wires has the variation condition; The detection method further includes a sensitivity adjustment method, which includes the following steps: Receive the second measurement signal having the second measurement voltage and a third reference voltage, and output a second analysis signal according to the second measurement voltage and the third reference voltage, wherein the third reference voltage is used to adjust the second sensitivity of the second signal measurement circuit; The detection method further includes a detection method for the variation condition of the plurality of wires, which includes the following steps: When the difference between the second measurement voltage and the third reference voltage is constantly positive during the measurement of one pair of the plurality of wires, it is determined that there is no such variation condition for the pair of wires, wherein the measurement period is from the start of the power supply to the period when the second measurement voltage approaches zero; And When the difference between the second measurement voltage and the third reference voltage is negative during the measurement of the pair of wires among the plurality of wires, it is determined that the pair of wires has the variation condition; and The detection method further includes the following steps: Respond to the second analysis signal to output a second digital signal to the control unit for determining the variation condition.

7. A coupling capacitor abnormality detection device for detecting an electronic device, comprising: A plurality of groups of switches, respectively electrically connected to a plurality of wires, and forming a first charging voltage between two of the plurality of wires; A signal measurement unit, providing a power supply, and comprising: A first signal measurement circuit having a first input terminal and a second input terminal for receiving the power supply, and forming a charging reference voltage between the ground terminal and the second input terminal; An energy storage unit electrically connected between the second input terminal and the ground terminal to form a charging reference voltage; And A control unit, controlling two of the plurality of groups of switches, so that two of the plurality of wires corresponding to the two groups of switches are respectively electrically connected to the first input terminal and the ground terminal, wherein there are electrical parameters between the two wires, whereby a first charging voltage is formed between the first input terminal and the ground terminal, and the control unit detects whether a variation condition occurs between the two wires according to the first charging voltage and the charging reference voltage, wherein: The detection device further includes a first signal analysis unit, which receives a first measurement signal from the first signal measurement circuit and digitizes the first measurement signal to provide the control unit for determining the variation condition; The signal measurement unit obtains a first charging characteristic curve by measuring the first charging voltage, and obtains a reference charging characteristic curve by measuring the charging reference voltage. The first signal analysis unit analyzes the first measurement signal to obtain a first difference curve between the first charging characteristic curve and the reference charging characteristic curve. The control unit determines the variation condition by judging the first difference curve.

8. The detection device according to claim 7, wherein: The electronic device is a printed circuit board; A coupling capacitor is formed between the first wire and the second wire; The electrical parameter is a coupling electrical parameter; The multiple group switches have a first output terminal and a second output terminal. Each of the multiple group switches corresponds to each of the multiple wires and is used to electrically connect each of the multiple wires to one of the first output terminal and the second output terminal; The first input terminal of the first signal measurement circuit is electrically connected to the first output terminal; The control unit provides control signals for the multiple group switches to control two of the multiple group switches to conduct with the first input terminal and the ground terminal respectively, so that the first wire of the multiple wires is electrically connected to the first output terminal, and the second wire of the multiple wires is electrically connected to the ground terminal. There is the coupling electrical parameter between the first wire and the second wire. The control unit judges the variation condition of each of the multiple wires according to the coupling electrical parameter; The second output terminal is electrically connected to the ground terminal; The second input terminal is electrically connected to a reference capacitor with a reference capacitance value, and a charging reference voltage is formed on the reference capacitor when receiving the power supply; The coupling electrical parameter is a coupling capacitance value; The first signal measurement circuit outputs a first measurement signal in response to the first charging voltage and the charging reference voltage; The first signal measurement circuit includes a differential amplifier having a positive input terminal and a negative input terminal. When the first input terminal is the positive input terminal, the second input terminal is the negative input terminal, and the first charging voltage is greater than the charging reference voltage during charging, the control unit judges that the coupling capacitance value is less than the reference capacitance value; When the first input terminal is the negative input terminal, the second input terminal is the positive input terminal, and the first charging voltage is less than the charging reference voltage during charging, the control unit judges that the coupling capacitance value is greater than the reference capacitance value; The signal measurement unit obtains a first energy storage characteristic curve by measuring the first charging voltage, and obtains a reference energy storage characteristic curve by measuring the charging reference voltage. The first signal analysis unit analyzes the first measurement signal to obtain a first difference curve between the first energy storage characteristic curve and the reference energy storage characteristic curve. The control unit judges the variation condition by judging the first difference curve; The variation condition includes short circuit or open circuit of two of the multiple wires; The first signal analysis unit includes: A first sensitivity regulation unit, which receives the first measurement signal having a first measurement voltage and a second reference voltage, and outputs a first analysis signal according to the first measurement voltage and the second reference voltage, wherein the second reference voltage is used to adjust the first sensitivity of the first signal measurement circuit; And A first digital logic unit, which outputs a first digital signal to the control unit in response to the first analysis signal for judging the variation condition; The first sensitivity regulation unit is a first comparator; The power supply is a DC voltage signal; The signal measurement unit further includes a second signal measurement circuit, which includes: The energy storage rate measurement unit outputs a second measurement signal with a second measurement voltage in response to the first charging voltage, where the second measurement voltage changes with the slope of the first charging voltage, where: When the second measurement voltage is constantly positive during the measurement of one pair of the plurality of wires, the control unit determines that there is no such abnormal condition in the pair of wires, where the measurement period is from the start of the power supply to the period when the second measurement voltage approaches zero; When the second measurement voltage is negative during the measurement of the pair of wires among the plurality of wires, the control unit determines that the pair of wires has such an abnormal condition; The detection device further includes a second signal analysis unit, which receives the second measurement signal from the second signal measurement circuit and digitizes the second measurement signal to provide the control unit to determine the abnormal condition; The second signal analysis unit includes: A second sensitivity adjustment unit, which receives the second measurement signal with the second measurement voltage and a third reference voltage, and outputs a second analysis signal according to the second measurement voltage and the third reference voltage, where the third reference voltage is used to adjust the second sensitivity of the second signal measurement circuit; and A second digital logic unit, which outputs a second digital signal to the control unit in response to the second analysis signal for determining the abnormal condition; and The second sensitivity adjustment unit is a second comparator.

9. A coupling capacitor abnormality detection device, comprising: A plurality of groups of switches, respectively and electrically connected to a plurality of wires, and forming a first charging voltage between two of the plurality of wires; A signal measurement unit, providing a power supply, and comprising: A signal measurement circuit, having an input terminal for receiving the power supply and including a storage rate measurement unit, forms a charging reference voltage between the ground terminal and the input terminal; And A control unit, controlling two of the plurality of groups of switches, so that two of the plurality of wires corresponding to the two groups of switches are respectively electrically connected to a first input terminal and a ground terminal, where: There are electrical parameters between the two wires, whereby a charging voltage is formed between the first input terminal and the ground terminal, and the energy storage rate measurement unit outputs a measurement signal with a measurement voltage in response to the charging voltage, where the measurement voltage changes with the slope of the charging voltage; and The control unit detects whether an abnormal condition occurs between the two wires according to the slope, where: The detection device further includes a first signal analysis unit, which receives the first measurement signal from the signal measurement circuit and digitizes the first measurement signal to provide the control unit to determine the abnormal condition; The detection device further includes a signal measurement unit, obtaining a first charging characteristic curve by measuring the first charging voltage, and obtaining a reference charging characteristic curve by measuring the charging reference voltage, the first signal analysis unit analyzes the first measurement signal to obtain a first difference curve between the first charging characteristic curve and the reference charging characteristic curve, and the control unit determines the abnormal condition by judging the first difference curve.

10. The detection device according to claim 9, where: The signal measurement circuit includes: A charge storage rate measurement unit that outputs a measurement signal with a measurement voltage in response to the charging voltage, where the measurement voltage changes with the slope of the charging voltage, where: When the measurement voltage is constantly positive during the measurement of one of the pairs of the plurality of wires, the control unit determines that there is no such abnormal condition in the pair of wires, where the measurement period is from the start of the power supply to the period when the measurement voltage approaches zero; When the measurement voltage is negative during the measurement period of the pair of wires among the plurality of wires, the control unit determines that the pair of wires has such an abnormal condition; The detection device further includes a signal analysis unit that receives the measurement signal from the signal measurement circuit and digitizes the measurement signal to provide the control unit to determine the abnormal condition; The signal analysis unit includes: A sensitivity adjustment unit that receives the measurement signal with the measurement voltage and a reference voltage, and outputs an analysis signal according to the measurement voltage and the reference voltage, where the reference voltage is used to adjust the sensitivity of the signal measurement circuit; and A digital logic unit that outputs a digital signal to the control unit in response to the analysis signal for determining the abnormal condition; and The sensitivity adjustment unit is a comparator.

11. A detection method for a coupling capacitor abnormality detection device, comprising the following steps: Providing a signal measurement circuit having an input terminal and a ground terminal, where two of the plurality of wires are electrically connected to the first input terminal and the ground terminal respectively; Providing a power supply to the signal measurement circuit to form a charging voltage between the two wires and a charging reference voltage between the ground terminal and the input terminal; Outputting a measurement signal with a measurement voltage in response to the charging voltage, where the measurement voltage changes with the slope of the charging voltage; And Judging whether an abnormal condition occurs between the two wires according to the slope, where: The detection device further includes a first signal analysis unit that receives the first measurement signal from the signal measurement circuit and digitizes the first measurement signal to provide the control unit to determine the abnormal condition; The detection device further includes a signal measurement unit that measures the charging voltage to obtain a first charging characteristic curve, and measures the charging reference voltage to obtain a reference charging characteristic curve. The first signal analysis unit analyzes the first measurement signal to obtain a first difference curve between the first charging characteristic curve and the reference charging characteristic curve. The control unit determines the abnormal condition by judging the first difference curve.

12. A coupling capacitor abnormality detection device, comprising: A reference capacitor; Two wires having an equivalent coupling capacitor, and a first charging voltage is formed between the two wires; and A signal measurement unit, comprising a signal measurement circuit, and configured to simultaneously supply power to the reference capacitor and the two wires at the starting time of measurement, so that the reference capacitor is charged to form a reference characteristic curve with a reference charging voltage during the measurement period, and at the same time, the equivalent coupling capacitor between the two wires is charged to form a characteristic curve to be measured with a charging voltage during the measurement period, wherein the reference characteristic curve is used to compare with the characteristic curve to be measured to detect whether an abnormal condition occurs between the two wires, and the reference characteristic curve is a reference charging characteristic curve, wherein: The detection device further comprises a first signal analysis unit, which receives a first measurement signal from the signal measurement circuit and digitizes the first measurement signal to provide a control unit to judge the abnormal condition; The detection device further comprises a signal measurement unit, which measures the first charging voltage to obtain a first charging characteristic curve, and measures the reference charging voltage to obtain the reference charging characteristic curve. The first signal analysis unit analyzes the first measurement signal to obtain a first difference curve between the first charging characteristic curve and the reference characteristic curve. The control unit judges the abnormal condition by judging the first difference curve.

13. A coupling capacitance abnormal detection device, comprising: A measurement unit that supplies power to measure a first electrical parameter, a reference charging voltage, and a second electrical parameter between a plurality of wires. The first electrical parameter is a first charging voltage. The measurement unit is a signal measurement unit and has a signal measurement circuit, and comprises: A voltage measurement unit measures the first electrical parameter; And A current measurement unit that measures the second electrical parameter; A detection unit that detects the first and the second electrical parameters to generate an abnormal trigger signal; And A control unit configured to detect at least one of the following, so that the control unit judges whether a variation condition of each of the plurality of wires occurs: Whether the increase value of the first electrical parameter per unit time detected by the voltage measurement unit is less than the reference voltage increase value; Whether the decrease value of the first electrical parameter per unit time in each of the continuous unit times detected by the voltage measurement unit is greater than the reference voltage decrease value, and whether the total decrease value of the first electrical parameter accumulated and decreased in the continuous unit times is greater than the reference total voltage decrease value; Whether the increase value of the second electrical parameter per unit time detected by the current measurement unit is greater than the reference current increase value; Whether the increase value of the second electrical parameter per unit time in each of the continuous unit times detected by the current measurement unit is greater than the reference current increase value, and whether the total increase value of the second electrical parameter accumulated and increased in the continuous unit times is greater than the reference total current increase value; and Whether the abnormal trigger signal detected by the detection unit is greater than an abnormal judgment setting value, wherein: The detection device further includes a first signal analysis unit, which receives a first measurement signal from the signal measurement circuit and digitizes the first measurement signal to provide the control unit for judging the mutation condition; The signal measurement unit obtains a first charging characteristic curve by measuring the first charging voltage and obtains a reference charging characteristic curve by measuring the reference charging voltage. The first signal analysis unit analyzes the first measurement signal to obtain a first difference curve between the first charging characteristic curve and the reference charging characteristic curve. The control unit judges the mutation condition by judging the first difference curve.

14. The detection device according to claim 13, wherein: The measurement unit is a standard abnormal signal measurement unit, and the detection unit is a minute abnormal signal detection unit; The first electrical parameter is the charging voltage, and the second electrical parameter is the charging current; The increase value of the first electrical parameter is the increase value of the charging voltage, and the increase value of the second electrical parameter is the increase value of the charging current; The decrease value of the first electrical parameter is the decrease value of the charging voltage, and the decrease value of the second electrical parameter is the decrease value of the charging current; The total decrease value of the first electrical parameter is the total voltage decrease value, and the total increase value of the second electrical parameter is the current increase value; The detection device further includes: A switch module, including multiple groups of switches, and having a first output terminal and a second output terminal. Each of the multiple groups of switches corresponds to each of the multiple wires and is used to electrically connect each of the multiple wires to one of the first output terminal and the second output terminal; And An equivalent energy storage unit, coupled between the first output terminal and the second output terminal, and forming the charging voltage between the two output terminals; The control unit provides a control signal to the switch module to electrically connect the first wire of the multiple wires to the first output terminal and electrically connect the second wire of the multiple wires to the second output terminal; The detection unit receives the charging voltage and has a first input terminal and a second input terminal. The first input terminal is coupled to the first output terminal, and the second output terminal is coupled to the second input terminal; and The control unit includes: A power supply and switch control unit, configured to control the operation time of the power supply and the switch module; A standard abnormal signal judgment unit, recording and judging whether the first and second electrical parameters meet a first detection standard value; And A minute abnormal judgment unit, recording and judging whether the first and second electrical parameters meet a second detection standard value; The detection unit includes: An amplifier, receiving the charging voltage to output an amplified signal; A charging rate measurement unit, outputting a minute abnormal trigger signal in response to the amplified signal; The detection device further includes an analog-to-digital converter, configured to convert the minute abnormal trigger signal into a digital signal; The standard abnormal signal judgment unit receives the digital signal to judge whether the first and second electrical parameters meet the first detection standard value; The minute anomaly determination unit receives a minute anomaly trigger signal to determine whether the first and second electrical parameters meet a second detection standard value.

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