Insulation detection device

Abstract

The embodiment of the present application provides an insulation detection device, which relates to the field of electronic power technology. The insulation detection device includes a detection circuit and a feedback circuit, wherein the detection circuit is used to output a pulse voltage to detect the insulation state of the device to be detected; the feedback circuit is connected to the output end and the input end of the detection circuit respectively, and is used to collect the signal of the pulse voltage and feed the signal of the pulse voltage back to the detection circuit. The insulation detection device collects the pulse voltage of the detection circuit through the feedback circuit and feeds it back to the detection circuit, thereby achieving the technical effect of stabilizing the output pulse voltage, improving the output accuracy and improving the safety.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and in particular to an insulation detection device. Background Art

[0002] Medical insulation tester is a device used to detect the damage of the insulation layer of medical devices, which can reduce the risk of using medical devices. Currently, for medical devices with insulation layers on the market, users can only observe the damaged layer with the naked eye, but tiny holes are difficult to distinguish. In order to solve this problem, it is necessary to use instruments for detection; however, the existing detection circuit has unstable output and poor precision. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide an insulation detection device, which can achieve the technical effects of improving output accuracy and improving safety.

[0004] An embodiment of the present application provides an insulation detection device, including a detection circuit and a feedback circuit, wherein the detection circuit is used to output a pulse voltage to detect the insulation state of a device to be detected; the feedback circuit is respectively connected to the output end and the input end of the detection circuit, and is used to collect the signal of the pulse voltage and feed the signal of the pulse voltage back to the detection circuit.

[0005] In the above implementation process, the insulation detection device collects the pulse voltage of the detection circuit through the feedback circuit and feeds it back to the detection circuit, thereby achieving the technical effect of stabilizing the output pulse voltage, improving output accuracy and improving safety.

[0006] Furthermore, the detection circuit includes a processing chip, a switching power supply chip and a first transformer. The processing chip is respectively connected to the switching power supply chip and the feedback circuit, and is used to receive the signal of the pulse voltage and control the operation of the switching power supply chip according to the signal of the pulse voltage; the switching power supply chip is connected to the first transformer, and is used to control the operation of the first transformer; the first transformer is used to output the pulse voltage.

[0007] In the above implementation process, the switching power supply chip can output a pulse voltage signal to the first transformer to drive the first transformer to generate the required pulse voltage; the processing chip can control the operation of the switching power supply chip according to the feedback signal of the feedback circuit to achieve voltage closed feedback; and the first voltage device can achieve electrical isolation to improve the safety performance of the circuit.

[0008] Furthermore, the output end of the switching power supply chip is connected to the primary coil of the first transformer for outputting the pulse voltage to the first transformer; the input end of the switching power supply chip is connected to the secondary coil of the first transformer for receiving voltage feedback from the secondary coil of the first transformer.

[0009] In the above implementation process, the switching power supply chip can realize the initial feedback between the first transformer, thereby achieving the output of a more stable pulse voltage signal.

[0010] Furthermore, the detection circuit also includes a first voltage follower, an input end of the first voltage follower is connected to an output end of the processing chip, and an output end of the first voltage follower is connected to an input end of the switching power supply chip.

[0011] In the above implementation process, the input end of the detection circuit and the output end of the processing chip are connected through the first voltage follower, which can improve the load capacity of the insulation detection device.

[0012] Furthermore, the device also includes a boost circuit, which is respectively connected to the output end of the detection circuit and the device to be detected, and is used to boost the pulse voltage and transmit the boosted pulse voltage to the device to be detected.

[0013] In the above implementation process, the pulse signal is boosted by the boost circuit, so as to obtain the required pulse voltage for the insulation performance test of the device to be detected.

[0014] Furthermore, the boost circuit includes a push-pull sub-circuit, which includes a first transistor, a second transistor and a third transistor, wherein the first transistor and the second transistor are push-pull connected, the base of the third transistor is connected to the output end of the detection circuit, the collector of the third transistor is connected to the base of the first transistor and the base of the second transistor, and the emitter of the third transistor is grounded.

[0015] In the above implementation process, the push-pull structure is composed of a first transistor and a second transistor, and the two transistors are respectively controlled by two complementary signals, so that one transistor is always turned on while the other is turned off; the push-pull subcircuit not only improves the load capacity of the circuit, but also improves the switching speed.

[0016] Furthermore, the boost circuit also includes a thyristor, a second transformer and a photocoupler, the input end of the thyristor is connected to the secondary coil of the first transformer, the output end of the thyristor is grounded, and the control end of the thyristor is connected to the output end of the push-pull sub-circuit; the input end of the photocoupler is connected to the output end of the push-pull sub-circuit, and the output end of the photocoupler is connected to the input end of the thyristor; the primary coil of the second transformer is connected to the secondary coil of the first transformer, the secondary coil of the second transformer is connected to the device to be detected, and the second transformer is used to boost the pulse voltage.

[0017] In the above implementation process, the thyristor and the photoelectric coupler work together with the second transformer to boost the pulse voltage output by the first transformer.

[0018] Furthermore, the boost circuit also includes a current limiting sub-circuit, which includes a first resistor and a second resistor, the first resistor and the second resistor are connected in parallel, the first end of the first resistor and the first end of the second resistor are connected to the secondary coil of the first transformer, and the second end of the first resistor and the second end of the second resistor are connected to the primary coil of the second transformer.

[0019] In the above implementation process, the current limiting sub-circuit can play a role in current limiting protection. The first resistor and the second resistor are connected in parallel. According to Ohm's formula: current I = U / R, the current limiting sub-circuit limits the output current, so that the insulation detection device can protect the device to be detected when in use.

[0020] Furthermore, the boost circuit also includes a field effect tube, the gate of the field effect tube is connected to the output end of the photocoupler, the source of the field effect tube is connected to the secondary coil of the first transformer, and the drain of the field effect tube is connected to the primary coil of the second transformer.

[0021] In the above implementation process, the connection between the first transformer and the second transformer is achieved through the conduction of the field effect tube, thereby completing the boosting of the pulse voltage.

[0022] Furthermore, the feedback circuit includes a second voltage follower, the input end of the second voltage follower is connected to the input end of the detection circuit, and is used to collect the signal of the pulse voltage; the output end of the second voltage follower is connected to the input end of the detection circuit, and is used to send the signal of the pulse voltage to the processing chip.

[0023] In the above implementation process, the load capacity of the insulation detection device can be further improved by using the second voltage follower.

[0024] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0025] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic block diagram of an insulation detection device provided in an embodiment of the present application;

[0028] Figure 2 A circuit diagram of a detection circuit and a feedback circuit provided in an embodiment of the present application;

[0029] Figure 3 A schematic block diagram of an insulation detection device provided in an embodiment of the present application;

[0030] Figure 4 A circuit diagram of a boost circuit provided in an embodiment of the present application;

[0031] Figure 5 A circuit diagram of an insulation detection device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0033] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] An insulation detection device provided in an embodiment of the present application can be used in insulation detection of medical instruments and equipment; the insulation detection device collects the pulse voltage of the detection circuit through a feedback circuit and feeds it back to the detection circuit, thereby achieving the technical effect of stabilizing the output pulse voltage, improving output accuracy and improving safety.

[0035] See also Figure 1 , Figure 1 A schematic block diagram of an insulation detection device provided in an embodiment of the present application, the insulation detection device comprises: a detection circuit 10, a feedback circuit 20 and a device to be detected 30.

[0036] Exemplarily, the detection circuit 10 is used to output a pulse voltage to detect the insulation state of the device to be detected 30 .

[0037] Exemplarily, the feedback circuit 20 is respectively connected to the output end and the input end of the detection circuit 10 , and is used to collect the pulse voltage signal and feed the pulse voltage signal back to the detection circuit 10 .

[0038] In some implementation scenarios, the insulation detection device detects the insulation of the device under test by outputting a pulse voltage. The insulation detection device uses the low-frequency detection principle to input a pulse voltage signal of a certain frequency into the device under test to achieve insulation detection.

[0039] Exemplarily, the detection circuit 10 includes a processing chip, a switching power supply chip and a first transformer. The processing chip is respectively connected to the switching power supply chip and the feedback circuit, and is used to receive a pulse voltage signal and control the operation of the switching power supply chip according to the pulse voltage signal; the switching power supply chip is connected to the first transformer, and is used to control the operation of the first transformer; the first transformer is used to output a pulse voltage.

[0040] Exemplarily, the processing chip is a single chip microcomputer.

[0041] See also Figure 2 , Figure 2 A circuit diagram of a detection circuit and a feedback circuit provided in an embodiment of the present application, including a switching power supply chip U303, a first transformer Q302, a field effect transistor IRF540N, a first voltage follower U304A and a second voltage follower U304B.

[0042] For example, the switching power supply chip U303 is a switching power supply pulse width modulation (Pulse width modulation) control chip. As an example but not a limitation, a switching power supply chip of model TL494 is used as an example for description; it should be understood that the switching power supply chip can also use other models of chips.

[0043] It should be noted that the specific models of the following components are only examples and not limitations, and will not be described in detail below.

[0044] Exemplarily, the switching power supply chip U303 has 16 pins, of which pins 9 and 10 are output terminals that can output pulse voltage signals; pins 2 and 3 of the switching power supply chip U303 are input terminals that are used to receive control signals from the processing chip so that the switching power supply chip U303 operates according to the control signals from the processing chip.

[0045] Exemplarily, the input end of the first voltage follower U304A is connected to the output end DA1 of the processing chip, and the output end of the first voltage follower U304A is connected to the input end of the switching power chip, that is, pin 3 and pin 2. The first voltage follower U304A is connected to the output end DA1 of the processing chip through a resistor R328, outputs the control signal of the processing chip to pin 2 of the switching power chip U303 after voltage following, and is connected to pin 3 of the switching power chip U303 through a resistor R322.

[0046] Exemplarily, the field effect transistor IRF540N is a field effect transistor with a model number of IRF540N; it should be understood that the model number is only used as an example and not as a limitation. The gate of the field effect transistor IRF540N is connected to the output end of the switching power chip U303 through a resistor R314, and the gate of the field effect transistor IRF540N is grounded through a resistor R318; the drain of the field effect transistor IRF540N is grounded, and the source of the field effect transistor IRF540N is connected to the primary coil of the first transformer Q302. Through the voltage control function of the field effect transistor IRF540N, the pulse voltage of the switching power chip U303 is output to the first transformer Q302, thereby driving the first transformer Q302 to output the pulse voltage.

[0047] Exemplarily, the first transformer Q302 may use a transformer of model TA300, which has 14 pins, of which pins 1-7 are ports of the primary coil, and pins 8-14 are ports of the secondary coil. Specifically, pin 2 of the first transformer is connected to a DC power supply, and pin 5 is connected to the source of the field effect transistor IRF540 to drive the first transformer Q302 to output a pulse voltage signal; the first transformer Q302 is connected to the positive electrode of the diode D303 and is grounded through the capacitor C305, thereby rectifying and filtering the secondary pulse voltage of the first transformer Q302 to obtain a DC voltage.

[0048] Exemplarily, the first transformer Q302 is connected to ground in series through a diode D303, a resistor R310, a resistor R313, a resistor R315, and a resistor R319. The resistors R310, R313, R315, and R319 form a voltage divider circuit to divide the DC voltage; and the voltage signal between the resistor R315 and the resistor R319 is collected to the feedback end of the switching power supply chip U303, that is, pin 1, so that the switching power supply chip can analyze the pulse voltage and realize feedback to make the output voltage more stable.

[0049] Exemplarily, the feedback circuit 20 includes a second voltage follower U304B, the input end of the second voltage follower U304B is connected to the input end of the detection circuit 10, and is used to collect the pulse voltage signal; the output end of the second voltage follower U304B is connected to the input end of the detection circuit 10, and is used to send the pulse voltage signal to the processing chip.

[0050] In some embodiments, the input end of the second voltage follower U304B is connected to the voltage divider circuit through the resistor R326, that is, connected between the resistor R315 and the resistor R319; the output end of the second voltage follower U304B is connected to the input end of the processing chip, that is, the AD1 port, for sending a pulse voltage signal to the processing chip.

[0051] Exemplarily, the AD1 port is the input port of the processing chip, and the processing chip can perform calculations and adjustments according to the preset output voltage of the operator, thereby outputting a control signal to the input end of the first power follower U304A.

[0052] In some embodiments, the input terminal AD1 of the processing chip is used to collect the pulse voltage of the switching power supply chip U393. After the processing chip calculates and adjusts the pulse voltage, the output terminal DA1 of the processing chip outputs the control signal to pin 2 of the switching power supply chip U303 through the first voltage follower U304A, thereby controlling the operation of the switching power supply chip U303, thereby realizing the feedback of the feedback circuit 20 to the detection circuit 10, achieving the technical effect of stabilizing the output pulse voltage, improving output accuracy and improving safety.

[0053] In some embodiments, the insulation detection device further includes a boost circuit, which is respectively connected to the output end of the detection circuit 10 and the device to be detected 30, for boosting the pulse voltage and transmitting the boosted pulse voltage to the device to be detected 30.

[0054] See also Figure 3 , Figure 3 A schematic block diagram of an insulation detection device provided in an embodiment of the present application, the insulation detection device includes a detection circuit 10, a feedback circuit 20, a device to be detected 30 and a boost circuit 40.

[0055] See also Figure 4 , Figure 4 A circuit diagram of a boost circuit provided in an embodiment of the present application. The boost circuit 40 includes a push-pull subcircuit 41, a current limiting subcircuit 42, a field effect transistor Q303, a thyristor Q305, a photocoupler U302, and a second voltage device T1.

[0056] Exemplarily, the push-pull sub-circuit 41 includes a first transistor Q304, a second transistor Q306 and a third transistor Q307, wherein the first transistor Q304 and the second transistor Q306 are push-pull connected, the base of the third transistor Q307 is connected to the output end of the detection circuit 10, the collector of the third transistor Q307 is connected to the base of the first transistor Q304 and the base of the second transistor Q306, and the emitter of the third transistor Q307 is grounded.

[0057] Exemplarily, the push-pull subcircuit 41 can improve the load capacity of the circuit and the switching speed. The push-pull structure generally means that two transistors are controlled by two complementary signals respectively, and one transistor is always turned on while the other is turned off.

[0058] Exemplarily, the output end of the detection circuit 10 is connected to the input end IN of the push-pull sub-circuit 41; when the input end IN of the push-pull sub-circuit 41 is input as a low-level signal, the first transistor Q304 is turned off, and the second diode Q306 is turned on, thereby providing current to the load end; when the input end IN of the push-pull sub-circuit 41 is input as a high-level signal, the third transistor Q307 is turned on, the first transistor Q304 is turned on, and the second diode Q306 is turned off, thereby providing current to the load end. The emitter of the first transistor Q304 and the emitter of the second diode Q306 are the central output points of the push-pull sub-circuit 41, serving as the input signal driven by the thyristor Q305 and the input signal driving the optical coupler U302.

[0059] Exemplarily, the input end of the thyristor Q305 is connected to the secondary coil of the first transformer Q302, the output end of the thyristor Q305 is grounded, and the control end of the thyristor Q305 is connected to the output end of the push-pull sub-circuit 41; the input end of the photoelectric coupler U302 is connected to the output end of the push-pull sub-circuit 41, and the output end of the photoelectric coupler U302 is connected to the input end of the thyristor Q305; the primary coil of the second transformer T1 is connected to the secondary coil of the first transformer Q302, the secondary coil of the second transformer T1 is connected to the device to be detected 30, and the second transformer T1 is used to boost the pulse voltage.

[0060] In some embodiments, the model of the thyristor Q305 can be selected from the BT151 series.

[0061] In some implementations, the photocoupler U302 may be a 4N25 series model.

[0062] In some implementation scenarios, the working principle of the boost circuit is as follows: when the resistor R311 inputs a high-level signal, the photocoupler U302 is turned on, and the output end of the photocoupler U302 outputs a low voltage signal; the anode of the thyristor Q305 generates a pulse signal, and through the capacitor C307, the pulse signal is coupled to the second transformer T1 to output the required high voltage.

[0063] Exemplarily, the gate of the field effect transistor Q303 is connected to the output end of the photocoupler U302, the source of the field effect transistor Q303 is connected to the secondary coil of the first transformer Q302, and the drain of the field effect transistor Q303 is connected to the primary coil of the second transformer T1. The field effect transistor Q303 is used for conduction between the first transformer Q302 and the second transformer T1.

[0064] Exemplarily, the boost circuit 40 includes a current limiting sub-circuit 42, which includes a first resistor R307 and a second resistor R312. The first resistor R307 and the second resistor R312 are connected in parallel, and the first end of the first resistor R307 and the first end of the second resistor R312 are connected to the secondary coil of the first transformer Q302, and the second end of the first resistor R307 and the second end of the second resistor R312 are connected to the primary coil of the second transformer T1.

[0065] In some embodiments, the current limiting subcircuit 42 can play a role in current limiting protection. The first resistor R307 and the second resistor R312 are connected in parallel. According to the formula: current I = U / R, the output current is limited, so that the insulation detection device can protect the device to be detected 30 when in use.

[0066] In some implementations, high-power resistors may be used for the first resistor R307 and the second resistor R312 to provide better protection.

[0067] See also Figure 5 , Figure 5 A circuit diagram of an insulation detection device provided in an embodiment of the present application.

[0068] It should be understood that Figure 5 The various parts of the circuit diagram have been explained above and will not be repeated here.

[0069] In some implementation scenarios, the working process of the insulation detection device is as follows:

[0070] Point A and point C are output voltage points, which enable U303 and the microcontroller to receive feedback voltage and stabilize the output voltage. The main function of transformer T1 is electrical safety isolation and boosting, protecting the operator and making the machine reliable and safe. Power resistors R307 and R312 are connected in parallel (part B) to limit the current output to avoid damage to the equipment and harm to the human body.

[0071] When the circuit of the insulation detection device is started, the switching power supply chip U303 starts to work, and the pins 9 and 10 of the switching power supply chip U303 output pulse voltage signals, which drive the field effect tube IRF540N after passing through the resistor R314; the field effect tube IRF540N is connected to the primary coil of the first transformer Q302, and drives the secondary coil of the first transformer Q302 to output pulse voltage; the diode D303 and the capacitor C305 rectify and filter the secondary pulse voltage of the first transformer Q302, thereby obtaining a DC voltage. The resistors R310, R313, R315, and R319 in the voltage divider subcircuit divide the DC voltage, and the sampled voltage between the resistors R315 and R319 is input to the pin 1 of the switching power supply chip U303 for analysis, so as to realize the initial feedback and make the output voltage more stable.

[0072] The processing chip performs calculations and adjustments according to the output voltage of the operator, and outputs a control signal to the first voltage follower U304A through the DA1 port; the first voltage follower U304A outputs the control signal of the DA1 port of the processing chip to pin 2 of the switching power supply chip U303 after voltage following, and the switching power supply U303 receives the control signal, thereby outputting the adjusted pulse voltage signal at pins 9 and 10, and the circuit realizes feedback again; in addition, the second voltage follower U304B outputs the voltage between the resistor R315 and the resistor R319 to the input terminal AD1 of the processing chip after voltage following, and the processing chip performs sampling and analysis on it; the processing chip can determine whether the output voltage is stable based on the collected voltage between the resistor R315 and the resistor R319. If the processing chip finds a short circuit, the pulse voltage signal output of the switching power supply chip U303 is immediately stopped.

[0073] The output end of the detection circuit 10 is connected to the input end IN of the push-pull sub-circuit 41; when the input end IN of the push-pull sub-circuit 41 is a low-level signal, the first transistor Q304 is turned off and the second diode Q306 is turned on, thereby providing current to the load end; when the input end IN of the push-pull sub-circuit 41 is a high-level signal, the third transistor Q307 is turned on, the first transistor Q304 is turned on, and the second diode Q306 is turned off, thereby providing current to the load end.

[0074] When the resistor R311 inputs a high level signal, the photocoupler U302 is turned on, and the output end of the photocoupler U302 outputs a low voltage signal; the anode of the thyristor Q305 generates a pulse signal, and the pulse signal is coupled to the second transformer T1 through the capacitor C307, and after the second transformer T1 steps up, the required high voltage is output. In addition, the current limiting subcircuit 42 can play a current limiting protection role. The first resistor R307 and the second resistor R312 are connected in parallel, and according to the formula: current I = U / R, the output current is limited, so that the insulation detection device can protect the device to be detected 30 when in use.

[0075] Through the above method, on the one hand, multiple feedbacks are set in the insulation detection device to maintain voltage stability, thereby achieving the technical effect of stabilizing performance and reducing errors; on the other hand, electrical isolation is achieved through the second transformer T1, and the current is limited by the current limiting sub-circuit, thereby achieving the technical effect of improving safety performance.

[0076] In the several embodiments provided in the present application, it should be understood that the functional modules in each embodiment can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part.

[0077] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0078] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0079] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. An insulation detection device, characterized in that: Including detection circuit and feedback circuit, The detection circuit is used to output a pulse voltage to detect the insulation state of the device to be detected; The feedback circuit is connected to the output end and the input end of the detection circuit respectively, and is used to collect the signal of the pulse voltage and feed the signal of the pulse voltage back to the detection circuit; The detection circuit includes a processing chip, a switching power chip and a first transformer. The processing chip is connected to the switching power chip and the feedback circuit respectively, and is used to receive the pulse voltage signal and control the operation of the switching power chip according to the pulse voltage signal; the switching power chip is connected to the first transformer, and is used to control the operation of the first transformer; the first transformer is used to output the pulse voltage; The output end of the switching power supply chip is connected to the primary coil of the first transformer, so as to output the pulse voltage to the first transformer; The input end of the switching power supply chip is connected to the secondary coil of the first transformer, and is used to receive voltage feedback of the secondary coil of the first transformer; The detection circuit further includes a first voltage follower, wherein an input end of the first voltage follower is connected to an output end of the processing chip, and an output end of the first voltage follower is connected to an input end of the switching power supply chip; The feedback circuit comprises a second voltage follower, the input end of the second voltage follower is connected to the output end of the detection circuit, and is used to collect the signal of the pulse voltage; The output end of the second voltage follower is connected to the input end of the processing chip, and is used to send the pulse voltage signal to the processing chip.

2. The insulation detection device according to claim 1, characterized in that: The device also includes a boost circuit, which is connected to the output end of the detection circuit and the device to be detected, respectively, and is used to boost the pulse voltage and transmit the boosted pulse voltage to the device to be detected.

3. The insulation detection device according to claim 2, characterized in that: The boost circuit includes a push-pull subcircuit, which includes a first triode, a second triode and a third triode, wherein the first triode and the second triode are push-pull connected, the base of the third triode is connected to the output end of the detection circuit, the collector of the third triode is connected to the base of the first triode and the base of the second triode, and the emitter of the third triode is grounded.

4. The insulation detection device according to claim 3, characterized in that: The boost circuit also includes a thyristor, a second transformer and a photocoupler. The input end of the thyristor is connected to the secondary coil of the first transformer, the output end of the thyristor is grounded, and the control end of the thyristor is connected to the output end of the push-pull sub-circuit; The input end of the photoelectric coupler is connected to the output end of the push-pull sub-circuit, and the output end of the photoelectric coupler is connected to the input end of the thyristor; The primary coil of the second transformer is connected to the secondary coil of the first transformer, the secondary coil of the second transformer is connected to the device to be detected, and the second transformer is used to boost the pulse voltage.

5. The insulation detection device according to claim 4, characterized in that: The boost circuit also includes a current limiting subcircuit, which includes a first resistor and a second resistor, the first resistor and the second resistor are connected in parallel, the first end of the first resistor and the first end of the second resistor are connected to the secondary coil of the first transformer, and the second end of the first resistor and the second end of the second resistor are connected to the primary coil of the second transformer.

6. The insulation detection device according to claim 5, characterized in that: The boost circuit also includes a field effect tube, a gate of the field effect tube is connected to the output end of the photocoupler, a source of the field effect tube is connected to the secondary coil of the first transformer, and a drain of the field effect tube is connected to the primary coil of the second transformer.

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