Simulation type digital insulation resistance test system and method

Abstract

The invention discloses a simulation type digital insulation resistance test system and a simulation type digital insulation resistance test method, which effectively guarantee the personal safety of operators, the simulation type digital insulation resistance test system comprises an upper computer, a simulation type insulation resistance tester and test equipment, the simulation type insulation resistance tester comprises a wiring network, a power supply network and a power supply network, the server is used for connecting to-be-tested equipment and reading, temporarily storing and outputting data of the to-be-tested equipment; the detection circuit can read various information of the tested equipment temporarily stored in the wiring network; a micro control unit (MCU); a low-voltage power supply module; a display module; a multi-gear selection switch; the upper computer is used for judging in combination with the analog quantity output by the micro control unit (MCU) and outputting a final resistance test result. The device is novel in structure, ingenious in conception and simple and convenient to operate, sampling of analog signals is more accurate, input signals are more stable, and workers can conveniently detect different devices.

Description

Technical Field

[0001] The invention belongs to the technical field of insulation resistance testing, and relates to a simulation type digital insulation resistance testing system and method. Background Art

[0002] At present, common insulation resistance testers are divided into several types according to their voltage levels, such as 100V, 250V, 500V, 1000V, 2500V, 5000V, etc.; they are divided into manual and electric types according to the use type. In the insulation preventive test of high-voltage power equipment, the commonly used insulation resistance testers are 1000V, 2500V, and 5000V. The DC power supply of the manual insulation resistance tester is generally supplied by the built-in hand-cranked generator. The DC power supply of the electric insulation resistance tester is generally supplied by a program-controlled DC high-voltage source.

[0003] As a simulation device, in addition to meeting the functional requirements, it also has an important safety indicator, which is to ensure the personal safety of the operator, even in the event of misoperation. Existing instruments have shortcomings. The electric insulation resistance testers on the market cannot ensure this safety indicator. Therefore, a simulation digital insulation resistance test system and method that can use a low-voltage power supply to ensure the personal safety of the operator is needed to solve the above problem. Summary of the invention

[0004] In view of the above problems, the present invention proposes a simulation type digital insulation resistance test system and method, which well solves the problems in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A simulation type digital insulation resistance test system, comprising a host computer, a simulation type insulation resistance tester and a test device, characterized in that: the simulation type insulation resistance tester comprises:

[0007] Wiring network, used to connect the device under test, and read, temporarily store and output the information of the device under test;

[0008] The detection circuit can read various information of the tested equipment temporarily stored in the wiring network and perform signal amplification processing;

[0009] A microcontroller unit is used to further process the information processed by the detection module and output analog quantities to the host computer;

[0010] A low voltage power supply module, which provides low voltage power supply to the wiring network and the device under test;

[0011] Display module, used for displaying output results;

[0012] A multi-position selector switch, including a multi-position selector switch detection circuit, for selecting a suitable voltage level according to different tested devices;

[0013] The host computer is used to make a determination based on the analog quantity output by the micro-control unit and output a final resistance test result.

[0014] Preferably, the wiring network is equipped with a resistance sampling board for detecting the resistance value of the device under test and outputting an analog signal.

[0015] Preferably, the detection circuit includes an instrumentation amplifier circuit for accurately sampling the analog signal.

[0016] Preferably, the micro-control unit is equipped with an analog-to-digital converter, and the analog-to-digital converter is used to filter and determine the stability of the collected digital quantity. The micro-control unit is connected to the host computer in a two-way communication via a communication interface.

[0017] Preferably, the multi-position selection switch detection circuit has a built-in optical coupling device 6N137 for isolating the input signal of the multi-position selection switch.

[0018] Preferably, the multi-position selection switch has five positions: 0FF, 1000V, 2500V, 5000V, and 10000V.

[0019] Preferably, the low-voltage power supply module uses a DC5V safety voltage for power supply.

[0020] Preferably, the test equipment comprises a simulation transformer.

[0021] The present invention also proposes a resistance testing method of a simulation type digital insulation resistance testing system, comprising the following steps:

[0022] S1, turn on the host computer;

[0023] S2. The simulation insulation resistance tester is connected to the device under test through a connecting line;

[0024] S3. Turn on the test equipment and the simulation insulation resistance tester;

[0025] S4. The host computer sets the corresponding relationship between the test equipment and the simulation insulation resistance tester and the test items;

[0026] S5. Set the parameters of the simulation insulation resistance tester through the multi-position selection switch;

[0027] S6. Start the simulation insulation resistance tester and select the gear position of the multi-position selection switch according to the different equipment under test;

[0028] S7, the host computer queries the parameters of the simulation type insulation resistance tester, and the simulation type insulation resistance tester records and uploads the parameter information;

[0029] S8, the host computer queries the simulation transformer wiring detection result, the simulation transformer detection resistor wiring combination voltage data, and transmits the voltage data back to the host computer;

[0030] S9, the host computer manually sets parameters, wiring status, and preset parameters according to the multi-position selection switch to obtain the final display data;

[0031] S10, the host computer sends the wiring status to the simulation insulation resistance tester, and the display module displays the set test error data;

[0032] S11. The simulation type insulation resistance tester stores the result, and the host computer, the simulation type insulation resistance tester and the test equipment are shut down to complete the test.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The present invention uses a DC5V safety voltage instead of a DC high voltage source to power the wiring network, which can ensure the personal safety of operators and achieve safety indicators for equipment use.

[0035] 2. The present invention has a detection circuit and an analog-to-digital converter (ADC), which can filter and determine the stability of the collected digital quantities, thereby increasing the stability of data transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The schematic diagram of the simulation insulation resistance tester of the present invention is shown in FIG.

[0037] Figure 2 The present invention is a logic relationship diagram of a resistance testing method of a simulation type digital insulation resistance testing system.

[0038] Figure 3 This is a detection circuit for the multi-position selection switch in the present invention. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The following is combined with Figure 1-Figure 3 The specific implementation modes of the present invention are described in further detail.

[0041] The present invention includes a host computer, a simulation type insulation resistance tester and a test device. In order to ensure the personal safety of the operator, the host computer is a PC computer, and the simulation type insulation resistance tester includes:

[0042] Wiring network, used to connect the device under test, and read, temporarily store and output the information of the device under test;

[0043] The detection circuit can read various information of the tested equipment temporarily stored in the wiring network and perform signal amplification processing;

[0044] A microcontroller unit (MCU), used to further process the information processed by the detection module and output analog quantities to the host computer;

[0045] A low voltage power supply module, which provides low voltage power supply to the wiring network and the device under test;

[0046] A display module is used to display the output result, and the display module is a 5-digit digital tube;

[0047] A multi-position selector switch, including a multi-position selector switch detection circuit, for selecting a suitable voltage level according to different tested devices;

[0048] The host computer is used to make a determination based on the analog quantity output by the microcontroller unit (MCU) and output a final resistance test result.

[0049] Further, by Figure 1-Figure 3 It is given that the wiring network is equipped with a resistance sampling board for detecting the resistance value of the tested device and outputting an analog signal.

[0050] Further, by Figure 1-Figure 3 It is given that in order to make the sampling of the analog signal more accurate, the detection circuit includes an instrument amplifier circuit for accurately sampling the analog signal.

[0051] Further, by Figure 1-Figure 3 It is given that the microcontrol unit (MCU) is equipped with an analog-to-digital converter (ADC), and the analog-to-digital converter (ADC) is used to filter and determine the stability of the collected digital quantity. The microcontrol unit (MCU) is connected to the host computer in a two-way communication via a communication interface.

[0052] Further, by Figure 1-Figure 3 It is given that in order to make the input signal more stable, the multi-speed selection switch detection circuit is built with an optical coupler device 6N137 for isolating the input signal of the multi-speed selection switch.

[0053] Further, by Figure 1 Figure 3It is given that in order to facilitate the staff to detect different equipment, the multi-position selection switch has five positions: 0FF, 1000V, 2500V, 5000V, and 10000V.

[0054] Further, by Figure 1-Figure 3 It is given that in order to make the operation of the staff safer, the low-voltage power supply module adopts DC5V safety voltage for power supply.

[0055] Further, by Figure 1-Figure 3 It is given that the test equipment includes a simulated transformer.

[0056] It should be noted that the use of a safe voltage of DC5V instead of a DC high-voltage source to power the wiring network can ensure the personal safety of the operators and achieve the safety indicators of the equipment. At the same time, in order to simulate the detection of insulation resistance, the upper computer sends the insulation resistance value to be simulated to the simulation insulation resistance tester through communication. The simulation insulation resistance tester makes a comprehensive judgment based on the received insulation resistance value and the wiring network access status actually measured by the detection circuit, as well as the selection status of the multi-speed selection switch, and displays the measurement result on the display module. At the same time, the measurement result is uploaded to the upper computer, and the upper computer determines the final result based on a certain algorithm.

[0057] When in use, after the tested device is connected to the wiring network, it is powered by a safe voltage of DC5V. The wiring network signal passes through the resistor sampling board to send the analog signal to be measured into the detection circuit. The detection circuit uses an instrument amplifier circuit to accurately sample the analog signal, and then sends it to the ADC module of the MCU. The ADC module filters and stabilizes the collected digital quantity, and then calculates the analog quantity through a certain algorithm, and sends the analog quantity to the host computer through the communication interface, and the host computer determines the final result.

[0058] In addition, the present invention also discloses a resistance testing method of a simulation type digital insulation resistance testing system, comprising: Figure 1 Figure 3 Given, including the following steps:

[0059] S1, turn on the host computer;

[0060] S2. The simulation insulation resistance tester is connected to the device under test through a connecting line;

[0061] S3. Turn on the test equipment and the simulation insulation resistance tester;

[0062] S4. The host computer sets the corresponding relationship between the test equipment and the simulation insulation resistance tester and the test items;

[0063] S5. Set the parameters of the simulation insulation resistance tester through the multi-position selection switch;

[0064] S6. Start the simulation insulation resistance tester and select the gear position of the multi-position selection switch according to the different equipment under test;

[0065] S7, the host computer queries the parameters of the simulation type insulation resistance tester, and the simulation type insulation resistance tester records and uploads the parameter information;

[0066] S8, the host computer queries the simulation transformer wiring detection result, the simulation transformer detection resistor wiring combination voltage data, and transmits the voltage data back to the host computer;

[0067] S9, the host computer manually sets parameters, wiring status, and preset parameters according to the multi-position selection switch to obtain the final display data;

[0068] S10; the host computer sends the wiring status to the simulation insulation resistance tester, and the display module displays the set test error data;

[0069] S11; the simulation type insulation resistance tester stores the result, the host computer, the simulation type insulation resistance tester and the test equipment are shut down, and the test is completed.

[0070] Further, by Figure 1-Figure 3 It is given that in steps S2-S11, the host computer regularly queries the power-on status of the test equipment and the simulation insulation resistance tester to ensure real-time online status.

[0071] The invention has a novel structure, an ingenious conception, and is simple and convenient to operate. The design effectively ensures the personal safety of operators, makes the sampling of analog signals more accurate, makes the input signal more stable, and facilitates the detection of different devices by operators.

[0072] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A simulation type digital insulation resistance test system, comprising a host computer, a simulation type insulation resistance tester and a test device, characterized in that: The simulation type insulation resistance tester comprises: Wiring network, used to connect the device under test, and read, temporarily store and output the information of the device under test; The detection circuit can read various information of the tested equipment temporarily stored in the wiring network and perform signal amplification processing; A microcontroller unit is used to further process the information processed by the detection module and output analog quantities to the host computer; A low voltage power supply module, which provides low voltage power supply to the wiring network and the device under test; Display module, used for displaying output results; A multi-position selector switch, including a multi-position selector switch detection circuit, for selecting a suitable voltage level according to different tested devices; The host computer is used to make a determination based on the analog quantity output by the micro-control unit and output a final resistance test result.

2. The simulation type digital insulation resistance test system according to claim 1, characterized in that: The wiring network is equipped with a resistance sampling board for detecting the resistance value of the device under test and outputting an analog signal.

3. The simulation type digital insulation resistance test system according to claim 1, characterized in that: The detection circuit includes an instrument amplifier circuit for accurately sampling the analog signal.

4. The simulation type digital insulation resistance test system according to claim 3, characterized in that: The micro-control unit is equipped with an analog-to-digital converter, which is used to filter and determine the stability of the collected digital quantity. The micro-control unit is connected to the host computer through a communication interface for two-way communication.

5. The simulation type digital insulation resistance test system according to claim 1, characterized in that: The multi-position selection switch detection circuit has a built-in optical coupler device 6N137 for isolating the input signal of the multi-position selection switch.

6. The simulation type digital insulation resistance test system according to claim 1, characterized in that: The multi-position selection switch is provided with five positions: OFF, 1000V, 2500V, 5000V, and 10000V.

7. The simulation type digital insulation resistance test system according to claim 1, characterized in that: The low voltage power supply module uses a DC5V safety voltage for power supply.

8. The simulation type digital insulation resistance test system and method according to claim 1, characterized in that: The test equipment includes a simulated transformer.

9. A resistance testing method of a simulation type digital insulation resistance testing system, comprising a simulation type digital insulation resistance testing system according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, turn on the host computer; S2. The simulation insulation resistance tester is connected to the device under test through a connecting line; S3. Turn on the test equipment and the simulation insulation resistance tester; S4. The host computer sets the corresponding relationship between the test equipment and the simulation insulation resistance tester and the test items; S5. Set the parameters of the simulation insulation resistance tester through the multi-position selection switch; S6. Start the simulation insulation resistance tester and select the gear position of the multi-position selection switch according to the different equipment under test; S7, the host computer queries the parameters of the simulation type insulation resistance tester, and the simulation type insulation resistance tester records and uploads the parameter information; S8, the host computer queries the simulation transformer wiring detection result, the simulation transformer detects the resistance wiring combination voltage data, and transmits the voltage data back to the host computer; S9, the host computer manually sets parameters, wiring status, and preset parameters according to the multi-position selection switch to obtain the final display data; S10, the host computer sends the wiring status to the simulation insulation resistance tester, and the display module displays the set test error data; S11. The simulation type insulation resistance tester stores the result, and the host computer, the simulation type insulation resistance tester and the test equipment are shut down to complete the test.

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