Insulation detector

Abstract

The insulation detector comprises a power supply module and a working module, the working module is electrically connected to the power supply module, the working module comprises a CPU, a boost circuit, a detection unit, a display, a temperature and humidity sensor and a USB output, the CPU is electrically connected to the power supply module, the boost circuit is electrically connected to the CPU, and the detection unit is electrically connected to the CPU. The detection unit is electrically connected to the boost circuit, the display is electrically connected to the CPU, the temperature and humidity sensor is electrically connected to the CPU, and the USB output is electrically connected to the CPU. The utility model relates to the field of insulation detector design, in particular to an insulation detector.

Description

Technical Field

[0001] The utility model relates to the field of insulation tester design, in particular to an insulation tester. Background Art

[0002] The insulation tester is suitable for monitoring the insulation of the power supply grid to the ground in the fields of electric locomotives, ships, mining, metallurgy, etc. The traditional way to detect the insulation to the ground is to use a megohmmeter for measurement, which is troublesome to use, the displayed value is unclear, and different megohmmeters need to be selected for different voltage levels.

[0003] It is troublesome to use and inefficient, and many megohmmeters need to be prepared according to different voltage levels. There are too many devices involved in the operation and it is easy to use them incorrectly. Utility Model Content

[0004] The utility model aims to solve the technical problem that the traditional megohmmeter is troublesome to use, needs to prepare many types of megohmmeters, and is prone to errors.

[0005] To solve the above problems, the technical solution adopted by the utility model is as follows: The utility model is an insulation detector, including a power module and a working module, the working module is electrically connected to the power module, the working module includes a CPU, a boost circuit, a detection unit, a display, a temperature and humidity sensor and a USB output, the CPU is electrically connected to the power module, the boost circuit is electrically connected to the CPU, the detection unit is electrically connected to the boost circuit, the display is electrically connected to the CPU, the temperature and humidity sensor is electrically connected to the CPU, and the USB output is electrically connected to the CPU.

[0006] Furthermore, the power module includes a DC-DC power supply and a 12V battery, the DC-DC power supply is electrically connected to the boost circuit, the detection unit, the CPU, the display, the temperature and humidity sensor and the USB output, and the 12V battery 10 is electrically connected to the DC-DC power supply.

[0007] Furthermore, a sampling line is provided on the detection unit.

[0008] Further, the detection unit includes a current limiting resistor, an insulation resistor, R8, R5, R34, R75, U10, U13, R21, R24 and R36, one end of the current limiting resistor is connected to the boost circuit, one end of the insulation resistor is connected to the other end of the current limiting resistor, one end of R8 is connected to the other end of the insulation resistor, one end of R5 is connected to the other end of R8, one end of R34 is connected to the other end of R5, one end of R75 is connected to the other end of R34, the other end of R75 is grounded, the pin8 of U10 is connected between R5 and R8, and the pin of U10 is connected to the other end of R5. n6 and pin7 are connected and commonly connected between R5 and R34, the pin5 pin of U10 is connected between R34 and R75, the pin4 pin of U13 is connected to the pin5 pin of U10, the pin3 pin of U13 is grounded, one end of R21 is connected to the pin1 pin of U10, and the other end of R21 is connected to the DC-DC power supply, one end of R24 is connected to the pin3 of U10, and the other end of R24 is connected to the DC-DC power supply, one end of R36 is connected to the pin1 of U13, and the other end of R36 is connected to the DC-DC power supply.

[0009] The beneficial effects achieved by the utility model using the above structure are as follows: the offline insulation test of the comprehensive insulation tester can output three voltage levels of 500V, 1000V and 2500V to cope with the test of different main and auxiliary circuits. The instrument has a data saving function and the test value can be saved and recorded in real time. In addition, the test data can also be transferred to a U disk and can be opened directly on the computer using EXCEL or WPS office software for easy viewing and saving. In addition, the device has a temperature and humidity sensor auxiliary function. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of an overall circuit module of an insulation tester proposed by the utility model;

[0011] Figure 2 This is a schematic diagram of a working module circuit module of an insulation detector proposed by the utility model;

[0012] Figure 3 This is a schematic diagram of a power module circuit module of an insulation tester proposed by the utility model;

[0013] Figure 4 A circuit diagram of a detection unit of an insulation detector proposed by the utility model;

[0014] Figure 5 This is a diagram showing the display content of a display device of an insulation tester proposed by the utility model;

[0015] Among them, 1. power module, 2. working module, 3. CPU, 4. boost circuit, 5. detection unit, 6. display, 7. temperature and humidity sensor, 8. USB output, 9. DC-DC power supply, 10. 12V battery, 11. sampling line. DETAILED DESCRIPTION

[0016] like Figure 1 to Figure 4 As shown, the utility model is an insulation detector, including a power module 1 and a working module 2, the working module 2 is electrically connected to the power module 1, the working module 2 includes a CPU 3, a boost circuit 4, a detection unit 5, a display 6, a temperature and humidity sensor 7 and a USB output 8, the CPU 3 is electrically connected to the power module 1, the boost circuit 4 is electrically connected to the CPU 3, the detection unit 5 is electrically connected to the boost circuit 4, the display 6 is electrically connected to the CPU 3, the temperature and humidity sensor 7 is electrically connected to the CPU 3, and the USB output 8 is electrically connected to the CPU 3.

[0017] The power module 1 includes a DC-DC power supply 9 and a 12V battery 10. The DC-DC power supply 9 is electrically connected to the boost circuit 4, the detection unit 5, the CPU 3, the display 6, the temperature and humidity sensor 7 and the USB output 8. The 12V battery 10 is electrically connected to the DC-DC power supply 9. The detection unit 5 is provided with a sampling line 10. The sampling line 10 is Figure 4 The detection unit 5 is denoted by 100 in the circuit diagram.

[0018] The detection unit 5 includes a current limiting resistor, an insulation resistor, R8, R5, R34, R75, U10, U13, R21, R24 and R36, one end of the current limiting resistor is connected to the boost circuit 4, one end of the insulation resistor is connected to the other end of the current limiting resistor, one end of R8 is connected to the other end of the insulation resistor, one end of R5 is connected to the other end of R8, one end of R34 is connected to the other end of R5, one end of R75 is connected to the other end of R34, the other end of R75 is grounded, pin 8 of U10 is connected between R5 and R8, and pin 6 and pin 1 of U10 are connected to each other. in7 is connected and commonly connected between R5 and R34, pin5 of U10 is connected between R34 and R75, pin4 of U13 is connected to pin5 of U10, pin3 of U13 is grounded, one end of R21 is connected to pin1 of U10, the other end of R21 is connected to DC-DC power supply 9, one end of R24 is connected to pin3 of U10, the other end of R24 is connected to DC-DC power supply 9, one end of R36 is connected to pin1 of U13, the other end of R36 is connected to DC-DC power supply 9.

[0019] During specific use: after the collected signal is processed, it is processed by the CPU 3 and displayed on the display 6, and the temperature and humidity sensor 7 senses the surrounding environment and transmits the signal through the USB output 8.

[0020] It should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An insulation tester, characterized in that: It includes a power module and a working module, the working module is electrically connected to the power module, the working module includes a CPU, a boost circuit, a detection unit, a display, a temperature and humidity sensor and a USB output, the CPU is electrically connected to the power module, the boost circuit is electrically connected to the CPU, the detection unit is electrically connected to the boost circuit, the display is electrically connected to the CPU, the temperature and humidity sensor is electrically connected to the CPU, and the USB output is electrically connected to the CPU.

2. An insulation tester according to claim 1, characterized in that: The power module includes a DC-DC power supply and a 12V battery. The DC-DC power supply is electrically connected to a boost circuit, a detection unit, a CPU, a display, a temperature and humidity sensor, and a USB output. The 12V battery 10 is electrically connected to the DC-DC power supply.

3. An insulation tester according to claim 2, characterized in that: The detection unit is provided with a sampling line.

4. An insulation tester according to claim 3, characterized in that: The detection unit includes a current limiting resistor, an insulation resistor, R8, R5, R34, R75, U10, U13, R21, R24 and R36, one end of the current limiting resistor is connected to the boost circuit, one end of the insulation resistor is connected to the other end of the current limiting resistor, one end of R8 is connected to the other end of the insulation resistor, one end of R5 is connected to the other end of R8, one end of R34 is connected to the other end of R5, one end of R75 is connected to the other end of R34, the other end of R75 is grounded, pin8 of U10 is connected between R5 and R8, pin6 and pin7 is connected and commonly connected between R5 and R34, the pin5 foot of U10 is connected between R34 and R75, the pin4 foot of U13 is connected to the pin5 foot of U10, the pin3 foot of U13 is grounded, one end of R21 is connected to the pin1 foot of U10, and the other end of R21 is connected to the DC-DC power supply, one end of R24 is connected to the pin3 of U10, and the other end of R24 is connected to the DC-DC power supply, one end of R36 is connected to the pin1 of U13, and the other end of R36 is connected to the DC-DC power supply.

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