Detection device

Abstract

The utility model provides a kind of detection device, it is used for surge generator, the detection device includes an output detection module, output detection module includes: one overvoltage protection element, one first light emitting diode, one second light emitting diode, capacitor element. The two ends of overvoltage protection element are used to connect the first end and the second end of surge signal output end. The anode of first light emitting diode is connected to the first end of overvoltage protection element, and its cathode is connected to the second end of overvoltage protection element. The cathode of second light emitting diode is connected to the first end of overvoltage protection element, and its anode is connected to the second end of overvoltage protection element. Capacitor element is arranged in parallel with first light emitting diode, or with second light emitting diode, or with first light emitting diode and second light emitting diode simultaneously. The detection device of the utility model can quickly identify the obvious failure of surge generator, and it is simple to operate, can reduce test time, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of testing, and in particular to a detection device for surge generators. Background Technology

[0002] Electromagnetic compatibility (EMC) testing is required for electronic and electrical equipment (such as fire safety products and building control products). Surge testing is a crucial EMC test, assessing the equipment's ability to function properly when subjected to external electrical surges (such as lightning strikes or voltage spikes caused by power system switching). This testing is essential for ensuring the reliability and safety of electronic and electrical equipment, especially in environments prone to extreme conditions. Surge testing not only improves product reliability but also enhances safety. For example, it ensures the equipment continues to operate normally even after a surge impact; it also ensures the product will not cause harm to users in the event of overvoltage, thus preventing safety hazards.

[0003] A surge generator is an important experimental instrument in surge testing. It is a transient voltage generator used to produce simulated surge voltages. To ensure the reliability of surge test results, routine inspection of the surge generator is essential. Furthermore, routine inspection can extend the lifespan of the surge generator, reduce unexpected downtime, and improve work efficiency.

[0004] In the current technology, there is no tool that can quickly perform routine testing of surge generators. Existing testing methods are complex, time-consuming, and inefficient. Utility Model Content

[0005] The purpose of this invention is to provide a detection device that can quickly identify obvious faults in surge generators. It is simple to operate, reduces testing time, and improves work efficiency.

[0006] This invention provides a detection device for a surge generator. The surge generator includes a surge signal output terminal. The detection device includes an output detection module, which comprises an overvoltage protection element, a first light-emitting diode (LED), a second LED, and a capacitor. The two ends of the overvoltage protection element are used to connect to the first and second terminals of the surge signal output terminal. The anode of the first LED is connected to the first terminal of the overvoltage protection element, and its cathode is connected to the second terminal. The cathode of the second LED is connected to the first terminal of the overvoltage protection element, and its anode is connected to the second terminal. The capacitor is arranged in parallel with the first LED, the second LED, or both LEDs. This detection device can quickly detect whether the surge generator has an output and whether the polarity of the output signal is correct. It is easy to implement and simple to operate.

[0007] In another illustrative embodiment of the detection device of this utility model, the overvoltage protection element is a varistor; the capacitor element is a non-polarized capacitor; the non-polarized capacitor is arranged in parallel with both the first light-emitting diode and the second light-emitting diode. The detection device of this utility model is easy to implement, low in cost, and convenient to use.

[0008] In another illustrative embodiment of the detection device of this utility model, the first end of the varistor can be connected to the first end of the surge signal output terminal through a fuse; the output detection module further includes a first resistor, the first end of which is connected between the varistor and the fuse, and its second end is connected to the positive terminal of the first light-emitting diode and the negative terminal of the second light-emitting diode. This protects the detection device and improves its reliability and safety.

[0009] In another illustrative embodiment of the detection device of this utility model, the overvoltage protection element is a transient voltage suppression diode; the capacitor element includes a first polarized capacitor and a second polarized capacitor; the positive terminal of the first polarized capacitor is connected to the positive terminal of the first light-emitting diode, and the negative terminal of the first polarized capacitor is connected to the negative terminal of the first light-emitting diode; the positive terminal of the second polarized capacitor is connected to the positive terminal of the second light-emitting diode, and the negative terminal of the second polarized capacitor is connected to the negative terminal of the second light-emitting diode. The detection device of this utility model is easy to implement and has higher reliability.

[0010] In another illustrative embodiment of the detection device of this utility model, the output detection module further includes a first diode, a second diode, a second resistor, and a third resistor. The anode of the first diode is connected to the first terminal of the transient voltage suppression diode, and the cathode of the first diode is connected to the anode of the first polarized capacitor. The anode of the second diode is connected to the second terminal of the transient voltage suppression diode, and the cathode of the second diode is connected to the anode of the second polarized capacitor. The second resistor is connected in series with the first LED and then in parallel with the first polarized capacitor. The third resistor is connected in series with the second LED and then in parallel with the second polarized capacitor. The detection device of this utility model has higher reliability.

[0011] In another illustrative embodiment of the detection device of this utility model, the first protection unit further includes a fifth resistor, the first end of which is connected to the negative terminal of the first diode, and the second end of which is connected to the positive terminal of the first light-emitting diode and the positive terminal of the first polarized capacitor; the second protection unit further includes a sixth resistor, the first end of which is connected to the negative terminal of the second diode, and the second end of which is connected to the positive terminal of the second light-emitting diode and the positive terminal of the second polarized capacitor.

[0012] In another illustrative embodiment of the detection device of this utility model, the output detection module further includes a seventh resistor. One end of the seventh resistor is connected to the second terminal of the transient voltage suppression diode, and the other end is used to connect to the surge signal output terminal.

[0013] In another illustrative embodiment of the detection device of this utility model, the detection device includes multiple test units and a selection switch. The multiple test units are connected in parallel, and each test unit includes a voltage-dividing resistor connected in series and an output detection module. The resistance value of the voltage-dividing resistor in each test unit is different from the resistance values ​​of the voltage-dividing resistors in the other test units. The selection switch includes a common terminal and multiple selection terminals, each of which is connected to the output detection module in a corresponding manner. The multiple test units connected in parallel are connected in series with the selection switch and can be connected to the surge signal output terminal. The detection device of this utility model can detect surge signals of different voltage levels, improving ease of use and accuracy.

[0014] In another illustrative embodiment of the detection device of this utility model, the detection device includes: an output detection module, a selection switch, and multiple voltage divider selection units. The selection switch includes a common terminal and multiple selection terminals, with the common terminal connected to the output detection module. The multiple voltage divider selection units are connected in parallel, each voltage divider selection unit including a voltage divider resistor, and the resistance value of the voltage divider resistor in each voltage divider selection unit is different from the resistance values ​​of the voltage divider resistors in the other voltage divider selection units. The multiple voltage divider selection units connected in parallel, the selection switch, and the output detection module are connected in series and can be connected to the surge signal output terminal. The testing device of this utility model can detect surge signals of different voltage levels and is simple to implement and low in cost.

[0015] In another illustrative embodiment of the detection device of this utility model, the detection device includes a housing, the housing includes two first connection terminals and a second connection terminal, the input terminal and the output terminal of the output detection module can be connected to the first connection terminal and the second connection terminal; the output detection module is disposed inside the housing, and the manual operation part of the selection switch protrudes from the housing. Attached Figure Description

[0016] The following figures are for illustrative purposes only and do not limit the scope of the present invention.

[0017] Figure 1 This is a schematic diagram illustrating one embodiment of the output detection module of this application.

[0018] Figure 2 This is a schematic diagram illustrating another implementation of the output detection module of this application.

[0019] Figure 3 This is a schematic diagram illustrating one embodiment of the detection device of this application.

[0020] Figure 4 This is a schematic diagram illustrating the structure of the detection device of this application.

[0021] Figure 5 This is another structural schematic diagram illustrating the detection device of this application.

[0022] Figure 6 This is another structural schematic diagram illustrating the detection device of this application.

[0023] The reference numerals in the attached figures are as follows:

[0024] 100 Output Detection Module R6 Sixth Resistor

[0025] LED1 is the first light-emitting diode, and R7 is the seventh resistor.

[0026] LED2 is the second light-emitting diode, and C0 is a non-polarized capacitor.

[0027] VDR varistor C1 is the first polarized capacitor.

[0028] TVS transient voltage suppressor diode C2 and second polarized capacitor

[0029] F fuse D1 first diode

[0030] R1 is the first resistor, and D2 is the second diode.

[0031] R2 is the second resistor, and S is the selector switch.

[0032] R3 third resistor 200 housing

[0033] R4 is the voltage divider resistor, and X1 is the first connection terminal.

[0034] R5, the fifth resistor, and X2, the second connection terminal. Detailed Implementation

[0035] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, specific embodiments of this utility model are now described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate components with the same or similar structures but the same function.

[0036] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0037] To keep the drawings concise, only the parts related to this utility model are shown schematically in each figure, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some figures, only one of the components with the same structure or function is shown schematically, or only one of them is labeled.

[0038] In this document, "a" can mean not only "only one" but also "more than one". In this document, "first", "second", etc., are used only to distinguish them from each other, and not to indicate their importance or order. The connections referred to in this application include both direct and indirect connections.

[0039] The detection device proposed in this invention can be used in a surge generator. A surge generator is a test device used to simulate transient overvoltages (surges) in power systems or electronic equipment. It is mainly used to evaluate the surge resistance of products (such as transient interference caused by lightning strikes or switching operations). The surge generator includes a surge signal output terminal.

[0040] The detection device of this utility model includes an output detection module 100. The output detection module 100 includes an overvoltage protection element, a first light-emitting diode (LED1), a second light-emitting diode (LED2), and a capacitor. The two ends of the overvoltage protection element are used to connect to the first and second terminals of the surge signal output terminal. The overvoltage protection element can limit overvoltage within a safe range through its non-linear characteristics, protecting downstream circuits from damage. The overvoltage protection element can be a varistor or a transient voltage suppressor diode. The positive terminal of the first LED1 is connected to the first terminal of the overvoltage protection element, and its negative terminal is connected to the second terminal. The negative terminal of the second LED2 is connected to the first terminal of the overvoltage protection element, and its positive terminal is connected to the second terminal. Since the first LED1 and the second LED2 are connected in parallel with opposite polarities to the overvoltage protection element, when the detection device is connected to the surge signal output terminal, the polarity of the output signal at the surge signal output terminal can be quickly determined by the lit LEDs. To facilitate observation of test results, the first light-emitting diode (LED1) and the second light-emitting diode (LED2) are preferably of different colors. The capacitor is arranged in parallel with the first LED1, or with the second LED2, or both. This capacitor absorbs high-frequency noise from surge signals, preventing flickering or uneven brightness of the LEDs. This capacitor can be either a non-polarized or a polarized capacitor.

[0041] Compared to conventional testing methods, this invention's testing device, while sacrificing some accuracy in the surge generator's output signal, can quickly detect whether the surge generator is outputting a signal normally and can also observe whether the positive and negative polarities of the output signal are accurate. This testing device ensures the surge generator's basic functions are normal during surge testing, reducing testing time and complexity. Although it sacrifices some accuracy in calculating frequency, rise time, and fall time, it reduces testing complexity and time, enabling rapid daily testing of surge generators and improving the reliability and safety of surge testing.

[0042] Figure 1 This is a schematic diagram illustrating one embodiment of the output detection module of this application.

[0043] like Figure 1 As shown, the output detection module 100 includes a varistor VDR, a non-polarized capacitor C0, a first light-emitting diode (LED1), and a second light-emitting diode (LED2). The two ends of the varistor VDR are used to connect the first and second terminals of the surge signal output terminal. The positive terminal of the first LED1 is connected to the first terminal of the varistor VDR, and its negative terminal is connected to the second terminal of the varistor VDR. The negative terminal of the second LED2 is connected to the first terminal of the varistor VDR, and its positive terminal is connected to the second terminal of the varistor VDR. The non-polarized capacitor C0 is arranged in parallel with both the first LED1 and the second LED2. The varistor VDR utilizes its non-linear volt-ampere characteristic to shunt large currents, clamping the voltage when the circuit experiences overvoltage, absorbing excess current to protect sensitive devices in the downstream circuit from damage. This detection device is not only easy to implement but also accurately identifies the polarity of the output signal at the surge signal output terminal, allows for intuitive observation of changes in the LEDs, and clearly displays the state of the surge signal.

[0044] To further protect the detection device and improve detection safety, a fuse F can be installed in the detection device. The first terminal of the varistor VDR can be connected to the first terminal of the surge signal output terminal through the fuse F; the second terminal of the varistor VDR can be connected to the second terminal of the surge signal output terminal. The output detection module 100 may also include a first resistor R1, the first terminal of which is connected between the varistor VDR and the fuse F, and its second terminal is connected to the positive terminal of the first light-emitting diode LED1 and the negative terminal of the second light-emitting diode LED2, thereby ensuring that the current flowing through the light-emitting diodes does not exceed the allowable range of the light-emitting diodes.

[0045] Figure 2 This is a schematic diagram illustrating another implementation of the output detection module of this application.

[0046] like Figure 2As shown, the output detection module 100 includes a transient voltage suppression diode (TVS), a first light-emitting diode (LED1), a second light-emitting diode (LED2), a first polarized capacitor (C1), and a second polarized capacitor (C2). The two ends of the TVS are used to connect to the first and second terminals of the surge signal output terminal. The anode of the first LED1 is connected to the first terminal of the TVS, and its cathode is connected to the second terminal of the TVS. The cathode of the second LED2 is connected to the first terminal of the TVS, and its anode is connected to the second terminal of the TVS. The anode of the first polarized capacitor (C1) is connected to the anode of the first LED1, and its cathode is connected to the cathode of the first LED1. The anode of the second polarized capacitor (C2) is connected to the anode of the second LED2, and its cathode is connected to the cathode of the second LED2. Transient voltage suppressor diodes (TVS) limit voltage to a safe range (such as clamping voltage VC) through avalanche breakdown effect, protecting sensitive components in downstream circuits from damage. This detection device is not only easy to implement but also accurately identifies the polarity of the surge signal output, making it convenient for testers.

[0047] To improve the reliability of the detection device, a first diode D1 and a second diode D2 can be further provided in the detection device. Preferably, the output detection module 100 also includes a first diode D1, a second diode D2, a second resistor R2, and a third resistor R3. The anode of the first diode D1 is connected to the first terminal of the transient voltage suppression diode TVS, and the cathode of the first diode D1 is connected to the anode of the first polarized capacitor C1. The anode of the second diode D2 is connected to the second terminal of the transient voltage suppression diode TVS, and the cathode of the second diode D2 is connected to the anode of the second polarized capacitor C2. The output detection module 100 may also include a second resistor R2 and a third resistor R3. The second resistor R2 is connected in series with the first light-emitting diode LED1 and then in parallel with the first polarized capacitor C1. The third resistor R3 is connected in series with the second light-emitting diode LED2 and then in parallel with the second polarized capacitor C2.

[0048] The output detection module 100 of this utility model may further include a fifth resistor R5 and a sixth resistor R6. The first end of the fifth resistor R5 is connected to the negative terminal of the first diode D1, and the second end is connected to the positive terminal of the first light-emitting diode LED1 and the positive terminal of the first polarized capacitor C1. The first end of the sixth resistor R6 is connected to the negative terminal of the second diode D2, and the second end is connected to the positive terminal of the second light-emitting diode LED2 and the positive terminal of the second polarized capacitor C2.

[0049] The output detection module 100 of this utility model may further include a seventh resistor R7. One end of the seventh resistor R7 is connected to the second terminal of the transient voltage suppression diode TVS, and the other end is used to connect to the surge signal output terminal.

[0050] Figure 3 This is a schematic diagram illustrating one embodiment of the detection device of this application.

[0051] To enable the testing device to detect surge signals at different voltage levels, multiple testing units can be set up within the device. For example... Figure 3 As shown, the testing device includes four test units. These four test units are connected in parallel. Each test unit includes a voltage divider resistor and an output detection module, which are connected in series. The resistance value of the voltage divider resistor in each test unit is different from the resistance values ​​of the voltage divider resistors in the other test units. Figure 4 The four test units are configured as follows: resistor R40 serves as the voltage divider in the first test unit; resistors R41 and R42 together form the voltage divider in the second test unit; resistors R43, R44, and R45 together form the voltage divider in the third test unit; and resistors R46, R47, R48, and R49 together form the voltage divider in the fourth test unit. The components in the four output detection modules of the four test units can be designed to be identical to those in the other output detection modules. Resistors R40, R41, R42, R43, R44, R45, R46, R47, R48, and R49 can use the same resistance value. By adjusting the number of these resistors in each test unit, surge signals at different voltage levels can be detected, thereby reducing the number of components and facilitating maintenance. Figure 3 Other numbers of test units can also be used, such as 2, 3, 5, 6, etc.

[0052] like Figure 3 As shown, the detection device also includes a selection switch S. This selection switch S includes a common terminal and multiple selection terminals, each of which is connected to the output detection module 100 in a corresponding manner. For example, Figure 3 Selector switch 3 uses terminal 2 as the common terminal, which is used to connect to the signal output terminal of the surge generator. Selector switches 3 uses terminals 1, 3, 4, and 5 as selection terminals, each connected to a test unit. Figure 3 In the detection device, switch S is connected in series with multiple test units that are connected in parallel, and can be connected to the surge signal output terminal.

[0053] In addition to Figure 3In addition to the method shown in the diagram of setting multiple test units to detect surge signals of different voltage levels, a scheme can also be implemented by setting only one output detection module 100 combined with multiple voltage divider selection units to reduce costs. Specifically, the detection device can be configured to include an output detection module 100, a selection switch S, and multiple voltage divider selection units arranged in series. The multiple voltage divider selection units are connected in parallel, and each voltage divider selection unit includes a voltage divider resistor, the resistance value of which differs from the resistance values ​​of the other voltage divider selection units. The selection switch S includes a common terminal and multiple selection terminals, with its common terminal connected to the output detection module 100 and each selection terminal connected to a voltage divider selection unit. Similar to... Figure 3 The resistors R40, R41, R42, R43, R44, R45, R46, R47, R48, and R49 are used in this embodiment. Different numbers of resistors of the same specification can also be used to implement different voltage divider selection units. For example, resistor R40 can be used as the first voltage divider selection unit; resistors R41 and R42 as the second voltage divider selection unit; resistors R43, R44, and R45 as the third voltage divider selection unit; and resistors R46, R47, R48, and R49 as the fourth voltage divider selection unit. Multiple voltage divider selection units are connected in parallel and then connected in series with the selection switch S and the output detection module 100 to form the detection circuit of the detection device. This detection circuit can be connected to the surge signal output terminal.

[0054] Figure 4 This is a schematic diagram illustrating the structure of the detection device described in this application. Figure 4 As shown, the detection device includes a housing 200, which includes two first connection terminals X1 and a second connection terminal X2. The detection device also includes an output detection module 100 as described above, whose input and output terminals are connected to the first connection terminals X1 and the second connection terminals X2. The first connection terminals X1 and the second connection terminals X2 are used to connect to the two terminals of the surge signal output terminal to be measured. The heads of the first light-emitting diode LED1 and the second light-emitting diode LED2 of the output detection module 100 are exposed outside the housing 200, or the first light-emitting diode LED1 and the second light-emitting diode LED2 are disposed inside the housing 200 but the light they emit is visible outside the housing 200.

[0055] Figure 5This is another structural schematic diagram illustrating the detection device of this application. The detection device includes a housing 200, which includes two first connection terminals X1 and a second connection terminal X2. The first connection terminals X1 and the second connection terminals X2 are used to connect to the two terminals of the surge signal output terminal to be tested. The detection device also includes an output detection module 100 as described above, a selection switch, and multiple voltage divider selection units; wherein the multiple voltage divider selection units are connected in parallel with each other, and the output detection module 100, the selection switch, and the multiple voltage divider selection units connected in parallel are connected in series. The manual operation part of the selection switch S is exposed outside the housing 200. The heads of the first light-emitting diode LED1 and the second light-emitting diode LED2 of the output detection module 100 are exposed outside the housing 200, or the first light-emitting diode LED1 and the second light-emitting diode LED2 are disposed inside the housing 200 but the light emitted by them is visible outside the housing 200.

[0056] Figure 6 This is another structural schematic diagram illustrating the detection device of this application. The detection device includes a housing 200, which includes two first connection terminals X1 and a second connection terminal X2. The first connection terminals X1 and the second connection terminals X2 are used to connect to the two terminals of the surge signal output terminal to be tested. The detection device also includes a device as described above. Figure 3 The diagram shows multiple output detection modules 100 and a selection switch; the multiple output detection modules 100 are connected in parallel, and the selection switch and the parallel output detection modules 100 are connected in series. The manual operation part of the selection switch S is exposed outside the housing 200. The heads of the first light-emitting diodes LED1 and LED2 of the multiple output detection modules 100 are exposed outside the housing 200, or the first light-emitting diodes LED1 and LED2 are disposed inside the housing 200 but the light they emit is visible outside the housing 200.

[0057] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other implementations that can be understood by those skilled in the art. The nouns and pronouns referring to people in this patent application are not limited to specific genders.

[0058] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. All equivalent implementation schemes or modifications made without departing from the spirit of the present utility model, such as combinations, divisions or repetitions of features, should be included within the scope of protection of the present utility model.

Claims

1. A detection device for a surge generator, the surge generator including a surge signal output terminal, the detection device including an output detection module (100), the output detection module (100) including: An overvoltage protection element, the two ends of which are used to connect the first and second ends of the surge signal output terminal; A first light-emitting diode (LED1) has its positive terminal connected to the first end of the overvoltage protection element and its negative terminal connected to the second end of the overvoltage protection element; A second light-emitting diode (LED2), the negative terminal of which is connected to the first terminal of the overvoltage protection element, and the positive terminal of which is connected to the second terminal of the overvoltage protection element; and A capacitor element is arranged in parallel with the first light-emitting diode (LED1), or with the second light-emitting diode (LED2), or simultaneously with both the first light-emitting diode (LED1) and the second light-emitting diode (LED2).

2. The detection device according to claim 1, characterized in that: The overvoltage protection element is a varistor (VDR); The capacitor element is a non-polarized capacitor (C0); The non-polar capacitor (C0) is arranged to be connected in parallel with both the first light-emitting diode (LED1) and the second light-emitting diode (LED2).

3. The detection device according to claim 2, characterized in that: The first terminal of the varistor (VDR) can be connected to the first terminal of the surge signal output terminal through a fuse (F); The output detection module (100) further includes a first resistor (R1), the first end of which is connected between the varistor (VDR) and the fuse (F), and the second end of which is connected to the positive terminal of the first light-emitting diode (LED1) and the negative terminal of the second light-emitting diode (LED2).

4. The detection device according to claim 1, characterized in that: The overvoltage protection element is a transient voltage suppressor diode (TVS); The capacitor element includes a first polarized capacitor (C1) and a second polarized capacitor (C2); The positive terminal of the first polarized capacitor (C1) is connected to the positive terminal of the first light-emitting diode (LED1), and the negative terminal of the first polarized capacitor (C1) is connected to the negative terminal of the first light-emitting diode (LED1). The positive terminal of the second polarized capacitor (C2) is connected to the positive terminal of the second light-emitting diode (LED2), and the negative terminal of the second polarized capacitor (C2) is connected to the negative terminal of the second light-emitting diode (LED2).

5. The detection device of claim 4, wherein, The output detection module (100) also includes: A first diode (D1) has its anode connected to the first terminal of the transient voltage suppressor diode (TVS) and its cathode connected to the anode of the first polarized capacitor (C1). A second diode (D2) has its anode connected to the second terminal of the transient voltage suppressor diode (TVS) and its cathode connected to the anode of the second polarized capacitor (C2); A second resistor (R2) is connected in series with the first light-emitting diode (LED1) and then in parallel with the first polarized capacitor (C1); A third resistor (R3) is connected in series with the second light-emitting diode (LED2) and then in parallel with the second polarized capacitor (C2).

6. The detection device of claim 5, wherein, The output detection module (100) also includes: A fifth resistor (R5) has its first end connected to the negative terminal of the first diode (D1) and its second end connected to the positive terminal of the first light-emitting diode (LED1) and the positive terminal of the first polarized capacitor (C1). A sixth resistor (R6) is provided, with its first end connected to the negative terminal of the second diode (D2) and its second end connected to the positive terminal of the second light-emitting diode (LED2) and the positive terminal of the second polarized capacitor (C2).

7. The detection device of claim 4, wherein, The output detection module (100) also includes: A seventh resistor (R7) is connected at one end to the second terminal of the transient voltage suppressor diode (TVS), and at the other end to the surge signal output terminal.

8. The detection device of claim 4, wherein, The detection device includes: Multiple test units are connected in parallel. Each test unit includes a voltage divider resistor (R4) connected in series and an output detection module (100). The resistance value of the voltage divider resistor (R4) in each test unit is different from the resistance value of the voltage divider resistor (R4) in the other test units. A selection switch (S) includes a common terminal and multiple selection terminals, which are connected one-to-one to the output detection module (100); The multiple test units connected in parallel are connected in series with the selection switch (S) and can be connected to the surge signal output terminal.

9. The detection device of claim 4, wherein, The detection device includes: One of the output detection modules (100); A selection switch (S) includes a common terminal and multiple selection terminals, the common terminal being connected to the output detection module (100); and Multiple voltage divider selection units are connected in parallel with each other. Each voltage divider selection unit includes a voltage divider resistor (R4), and the resistance value of the voltage divider resistor (R4) of each voltage divider selection unit is different from the resistance value of the voltage divider resistor (R4) of the other voltage divider selection units. The multiple voltage divider selection units connected in parallel, the selection switch (S), and the output detection module (100) are connected in series and can be connected to the surge signal output terminal.

10. The detection device according to claim 8 or 9, characterized in that: The detection device includes a housing (200), the housing (200) includes two first connection terminals (X1) and a second connection terminal (X2), and the input and output terminals of the output detection module (100) can be connected to the first connection terminal (X1) and the second connection terminal (X2); The output detection module (100) is disposed inside the housing (200), and the manual operation part of the selection switch (S) is exposed outside the housing (200).

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