CN213069012U - High voltage wire harness insulation testing device based on direct current - Google Patents
High voltage wire harness insulation testing device based on direct current Download PDFInfo
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- CN213069012U CN213069012U CN202020988238.0U CN202020988238U CN213069012U CN 213069012 U CN213069012 U CN 213069012U CN 202020988238 U CN202020988238 U CN 202020988238U CN 213069012 U CN213069012 U CN 213069012U
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Abstract
The utility model relates to a based on highly compressed pencil insulation test device of direct current, include: the system comprises a main control module, a direct current insulation test module, a bus switching module and a relay switching module; the insulation testing module adjusts the voltage of the circuit until reaching a set voltage value according to a first control signal sent by the main control module, acquires the current value of the circuit after the voltage reaches the set voltage value, calculates the insulation resistance value according to the set voltage value and the current value, and then sends the insulation resistance value to the main control module; the direct-current high-voltage test insulation can provide high-voltage direct current for the lead for a long time, and the insulation test result is more stable. The utility model discloses there are a plurality of test ports in high voltage pencil insulation test device based on direct current, accessible bus switch module and relay switch module switch over direct current high voltage bus to the pencil test port of required test on, but the insulation resistance of many pencil of automatic test.
Description
Technical Field
The utility model relates to a pencil testing arrangement, concretely relates to insulating testing arrangement of pencil based on direct current is highly compressed.
Background
The wire harness insulation test is widely applied to the fields of aviation, aerospace, military, industrial application and the like, and along with the development of scientific technology, the requirement on the wire harness insulation test is higher and higher.
The conventional scheme based on the alternating current test is to provide 50HZ alternating voltage, cannot provide stable high voltage for a wire, is not suitable for insulation test, and in addition, the test time is long and the test result is unstable.
Although the existing wire harness insulation test equipment based on the direct current high voltage can provide stable high voltage for a wire for a long time by testing insulation with direct current and test the insulation performance of a wire harness, the switching speed is not fast enough because a channel switching module of the wire harness insulation test equipment is controlled by a single chip microcomputer, and the performance of the single chip microcomputer serving as a controller of the channel switching module is not stable enough.
SUMMERY OF THE UTILITY MODEL
In order to solve the above-mentioned problem that exists among the prior art, the utility model provides a based on highly compressed pencil insulation testing arrangement of direct current. The to-be-solved technical problem of the utility model is realized through following technical scheme:
a wire harness insulation test device based on a direct current high voltage comprises: the system comprises a main control module, a direct current insulation test module, a bus switching module and a relay switching module; wherein,
the main control module receives an operation command sent by the upper computer and controls other modules to operate according to the corresponding command;
the direct-current insulation test module is connected with the main control module and is connected with the bus switching equipment through a direct-current high-voltage bus; adjusting the voltage of the circuit according to a first control signal sent by the main control module until the voltage reaches a set voltage value; collecting a current value of a line after the voltage reaches a set voltage value, calculating an insulation resistance value according to the set voltage value and the current value, and sending the insulation resistance value to the main control module;
the bus switching module is connected with the main control module and the relay switching module; switching the direct-current high-voltage bus to the relay switching module according to a second control signal sent by the main control module;
the relay switching module is respectively connected with the main control module, the bus switching module and the wiring harness test port; and switching a direct-current high-voltage bus on the relay switching module to a tested wire harness of the wire harness test port according to a third control signal sent by the main control module.
Further, the main control module adopts a Stm32 single-chip microcomputer controller.
Further, the direct current insulation test module comprises a first CAN communication interface, a first FPGA module, a high-voltage boosting module, a high-voltage acquisition module and a current acquisition module; wherein,
the first FPGA module is connected with the main control module through the first CAN communication interface;
the high-voltage boosting module, the high-voltage acquisition module and the current acquisition module are respectively connected with the first FPGA module and the direct-current high-voltage bus.
Further, the high-voltage boosting module comprises a power amplifier, a transformer and a rectifying circuit; wherein,
the power amplifier is connected with the first FPGA module through the DDS generator, the transformer is connected between the power amplifier and the rectifying circuit, and the rectifying circuit is also connected with the direct-current high-voltage bus.
Furthermore, the current acquisition module is an AD current acquisition circuit.
Further, the relay switching module comprises a second CAN communication interface, a singlechip and a second FPGA module; wherein,
the single chip microcomputer is connected with the main control module through the second CAN communication interface;
the second FPGA module is connected with the single chip microcomputer and the wiring harness test port.
Further, the intelligent control system further comprises a display screen, wherein the display screen is connected with the upper computer, and the upper computer sends the control command input on the display screen to the main control module.
The main control module, the direct-current insulation test module, the bus switching module and the relay switching module are arranged in the shell; the wiring harness test port is arranged on the shell.
Furthermore, the wire harness test ports are multiple, and the tested wire harness of each wire harness test port is connected with the direct-current high-voltage bus through the switching of the relay switching module.
Further, still be provided with the USB port on the casing, the USB port with the host computer is connected.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses based on the insulating testing arrangement of pencil of direct current high pressure, insulating test module adjusts the voltage of circuit until reaching the settlement voltage value according to the first control signal that host system sent, and gather the current value of circuit after voltage reaches the settlement voltage value, and calculate insulation resistance value according to the settlement voltage value with the current value, will again insulation resistance value send to host system; the direct-current high-voltage test insulation can provide high-voltage direct current for the lead for a long time, and the insulation test result is more stable.
2. The utility model discloses based on highly compressed pencil insulation test device of direct current, there are a plurality of test ports, accessible bus switch module and relay switch module switch over the direct current high voltage bus to the pencil test port of required test on, but the insulation resistance of many pencil of automatic test.
3. The utility model discloses based on the insulating testing arrangement of direct current high voltage pencil, host system adopts Stm32 single chip microcomputer control, and relay switching module and direct current insulation test module adopt FPGA control, replace the original numerical control device who constitutes with hardware logic circuit, and switching speed is fast, the stable performance; and the realization of various control functions of storage, processing, operation, logic judgment and the like of the input operation instruction can be realized by computer software.
4. The utility model discloses based on highly compressed pencil insulation test device of direct current, whole testing process can all realize automaticly, is connected to pencil test port with the pencil after, only need on the display screen operation click begin the test can, the test result can appear on the display screen fast.
Drawings
Fig. 1 is a schematic frame diagram of a wire harness insulation testing device based on direct current high voltage provided by the embodiment of the utility model.
Fig. 2 is a schematic structural diagram of a dc insulation test module of a wire harness insulation test device based on dc high voltage provided by the embodiment of the utility model.
Fig. 3 is a schematic structural diagram of a bus switching module of a wire harness insulation testing device based on direct current high voltage provided by the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a relay switching module of a wire harness insulation testing device based on direct current high voltage provided by the embodiment of the utility model.
Fig. 5 is a schematic structural diagram of a relay group of a wire harness insulation testing device based on direct current high voltage provided by the embodiment of the present invention.
Fig. 6 is an overall appearance structure diagram of a wire harness insulation testing device based on direct current high voltage provided by the embodiment of the utility model.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.
Referring to fig. 1, fig. 1 is a schematic frame diagram of a wire harness insulation testing device based on a dc high voltage according to an embodiment of the present invention in fig. 1. The wire harness insulation test device based on the direct current high voltage as shown in fig. 1 comprises: the device comprises a main control module, a direct current insulation test module, a bus switching module and a relay switching module.
The main control module is connected with and communicates with the upper computer, receives the control command sent by the upper computer, and controls other modules to operate according to the corresponding command. The main control module preferably adopts a Stm32 single-chip microcomputer controller. It should be noted that the host computer can set up the utility model discloses a pencil insulation test device's inside also can set up in pencil insulation test device's outside, when setting up when outside, outside host computer accessible pencil insulation test device's serial ports and host system communicate. The wire harness insulation testing device is preferably arranged inside the wire harness insulation testing device and is integrated with other modules of the wire harness insulation testing device.
The direct-current insulation test module is connected with the main control module and is connected with the bus switching equipment through a direct-current high-voltage bus; adjusting the voltage of the circuit according to a first control signal sent by the main control module until the voltage reaches a set voltage value; collecting a current value of a line after the voltage reaches the set voltage value, calculating an insulation resistance value according to the set voltage value and the current value, and sending the insulation resistance value to the master control module through a CAN bus; and the main control module sends the insulation resistance value to an upper computer for processing and displaying.
Please refer to fig. 2, fig. 2 is a schematic structural diagram of a dc insulation testing module of a wire harness insulation testing device based on dc high voltage according to an embodiment of the present invention. As a preferred embodiment, the direct current insulation test module comprises a first CAN communication interface, a first FPGA module, a high voltage boost module, a high voltage acquisition module and a current acquisition module; the first FPGA module is connected with the main control module through a first CAN communication interface; the high-voltage boosting module, the high-voltage acquisition module and the current acquisition module are respectively connected with the first FPGA module and the direct-current high-voltage bus. The main control module sends a command to the high-voltage boosting module to boost the voltage, the high-voltage acquisition module is used for acquiring the high voltage and feeding back the acquired result to the main control module, the main control module sends a command to the high-voltage boosting module to adjust the voltage until the voltage reaches a set voltage value, and the current acquisition module is used for acquiring the current when the voltage reaches the set voltage value; the first FPGA module calculates an insulation resistance value according to the set voltage value and the acquired current value, then sends the insulation resistance value to the main control module through the CAN bus, and the main control module sends the insulation resistance value to the upper computer through the serial port for processing and displaying.
Preferably, the high-voltage boosting module comprises a power amplifier, a transformer and a rectifying circuit; the power amplifier is connected with the first FPGA module through the DDS generator, the transformer is connected between the power amplifier and the rectifying circuit, and the rectifying circuit is further connected with the direct-current high-voltage bus. The high-voltage boosting module adopts 50Hz sine wave voltage output by the first FPGA module through the DDS generator, the voltage amplitude is adjustable, and the voltage is boosted by 60 times through the transformer.
Preferably, the voltage acquisition equipment is a high-precision AD voltage acquisition circuit, and can accurately acquire the voltage at two ends of the resistor to be detected.
Preferably, the current acquisition module is a high-precision AD current acquisition circuit and comprises a 24-bit ADC differential amplification and sampling resistor. The current acquisition module is a high-precision AD acquisition circuit and can accurately acquire the current flowing through the resistor to be detected.
The bus switching module is connected with the main control module and the relay switching module; and switching the direct-current high-voltage bus to the relay switching module according to a second control signal sent by the main control module. The bus switching module has two functions, the first function is to exchange the sequence of the high-voltage bus through the bus switching module, and the test can be carried out on positive current and negative current; the second function is to disconnect the bus switching module when the high voltage test is finished, so as to protect the relay switching module and prevent the high voltage from damaging the relay module.
Please refer to fig. 3, fig. 3 is a schematic structural diagram of a bus switching module of a wire harness insulation testing device based on a dc high voltage according to an embodiment of the present invention. The bus switching module switches the direct-current high voltage into an A bus and a B bus, is connected with the relay switching module and is connected with a detected wire harness of the wire harness detection port; namely, the tested wire harness is connected into the direct current high voltage bus.
The relay switching module is respectively connected with the main control module, the bus switching module and the wiring harness test port; and switching the direct-current high-voltage bus switched to the relay switching module to the tested wire harness of the wire harness test port according to a third control signal sent by the main control module. The main function of the relay switching module is to switch the high-voltage bus provided by the bus switching module to a specific port.
The wiring harness test ports can be multiple, and the tested wiring harness of each wiring harness test port is connected with the direct-current high-voltage bus through the switching of the relay switching module. The user can connect the tested wire to the port at one time, and the tested wire of the port is tested only by switching the relay, so that the use is very convenient.
Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of a relay switching module of a wire harness insulation testing device based on a high dc voltage according to an embodiment of the present invention; fig. 5 is a schematic structural diagram of a relay group of a wire harness insulation testing device based on direct current high voltage provided by the embodiment of the present invention. As a preferred embodiment of the present invention, the relay switching module includes a second CAN communication interface, a single chip microcomputer, and a second FPGA module; the single chip microcomputer is connected with the main control module through a second CAN communication interface; the second FPGA module is connected with the single chip microcomputer and the wire harness test port. The wiring harness test ports are multiple in parallel, multiple groups of wiring harnesses can be inserted simultaneously, and the second FPGA module controls the multiple relays of the relay group to rapidly switch the direct-current high-voltage bus to the wiring harness to be tested.
The utility model discloses based on highly compressed pencil insulation test device of direct current, host system adopt Stm32 single chip microcomputer control, and relay switching module and direct current insulation test module adopt FPGA control, replace original numerical control device who constitutes with hardware logic circuit, make the stable performance of equipment, powerful to based on the direct current voltage test, the test result is more reliable.
Please refer to fig. 6, fig. 6 is a schematic diagram of an overall appearance structure of a wire harness insulation testing device based on dc high voltage according to an embodiment of the present invention. The utility model discloses high voltage wire harness insulation testing arrangement based on direct current of embodiment can also include the casing, and host system, direct current insulation testing module, bus switching module and relay switching module set up in the casing; the wiring harness test port is arranged on the shell. The display screen can be further included, and the display screen is preferably a touch screen; the display screen is connected with the upper computer, and the upper computer sends the control command input on the display screen to the main control module; the touch screen is connected with the upper computer through an HDMI (high-definition multimedia interface) wire, and then the upper computer is communicated with each module circuit through a serial port to control each module. The shell is also provided with a USB port, and the USB port is connected with an upper computer. And downloading the detection data through the USB port or connecting a printer to print the test result.
It should be noted that, the utility model discloses a direct current high voltage insulation testing arrangement can also be equipped with high pressure pilot lamp. When the high-voltage work is performed, the indicator lamp is lightened. The device can be provided with a 3A fuse, the DC insulation test module is provided with the maximum overcurrent protection, the test voltage provided by the DC insulation test module for the high-voltage bus can reach 1000V maximally, the exciting current detection range is 1uA to 8mA, and when the test current is more than 8mA, the automatic protection mode is entered. The utility model discloses a direct current high voltage insulation testing arrangement, test insulation resistance range is 5K ohm to 1000M ohm.
The utility model discloses based on highly compressed pencil insulation test device of direct current's theory of operation is: connecting a tested lead to a tested port of the device, sending an insulation test command to the main control module by the upper computer through a serial port, sending a control command to the bus switching module by the main control module, switching the high-voltage bus to the relay switching module, sending the control command to the relay switching module by the main control module, switching the high-voltage bus to the tested port, then the main control module sends a command to the high-voltage boosting module to boost the voltage, the high-voltage acquisition module is used for acquiring the high voltage, the acquired result is fed back to the first FPGA module, the first FPGA module sends a command to adjust the voltage to the high-voltage boosting module until the voltage reaches a set voltage value, when the voltage reaches a set voltage value, a current acquisition module is used for acquiring a current value, an insulation resistance value is calculated according to the set voltage value and the current value, and then the insulation resistance value is sent to the main control module; and the main control module sends the insulation resistance value to an upper computer through a serial port for processing and displaying. The utility model discloses based on highly compressed pencil insulation test device of direct current, whole testing process can all realize automaticly, pencil insulation test device with set up in its inside or outside host computer connection communication, can directly carry out insulation test operation through the touch-sensitive screen of host computer, only need to be connected to on the pencil test port by the pencil of being surveyed, software through on the host computer sets up and establishes test parameter, click and begin to test can to can set up the insulation resistance that automatic test tested many harnesses through the host computer. The main control module is controlled by Stm32 single-chip microcomputer, and the relay switching module and the DC insulation test module are controlled by FPGA, so as to replace the original numerical control device composed of hardware logic circuits, and realize various control functions of input operation instruction storage, processing, operation, logic judgment and the like by computer software.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (10)
1. A wire harness insulation test device based on a direct current high voltage is characterized by comprising: the system comprises a main control module, a direct current insulation test module, a bus switching module and a relay switching module; wherein,
the main control module receives an operation command sent by the upper computer and controls other modules to operate according to the corresponding command;
the direct-current insulation test module is connected with the main control module and is connected with the bus switching equipment through a direct-current high-voltage bus; adjusting the voltage of the circuit according to a first control signal sent by the main control module until the voltage reaches a set voltage value; collecting a current value of a circuit after the voltage reaches the set voltage value, calculating an insulation resistance value according to the set voltage value and the current value, and sending the insulation resistance value to the main control module;
the bus switching module is connected with the main control module and the relay switching module; switching the direct-current high-voltage bus to the relay switching module according to a second control signal sent by the main control module;
the relay switching module is respectively connected with the main control module, the bus switching module and the wiring harness test port; and switching a direct-current high-voltage bus on the relay switching module to a tested wire harness of the wire harness test port according to a third control signal sent by the main control module.
2. The device for testing insulation of the wire harness based on the direct-current high voltage as claimed in claim 1, wherein the main control module adopts a Stm32 single chip microcomputer controller.
3. The direct-current high-voltage based wire harness insulation testing device according to claim 1, wherein the direct-current insulation testing module comprises a first CAN communication interface, a first FPGA module, a high-voltage boosting module, a high-voltage collecting module and a current collecting module; wherein,
the first FPGA module is connected with the main control module through the first CAN communication interface;
the high-voltage boosting module, the high-voltage acquisition module and the current acquisition module are respectively connected with the first FPGA module and the direct-current high-voltage bus.
4. The wire harness insulation test device based on the direct current high voltage, according to claim 3, wherein the high voltage boosting module comprises a power amplifier, a transformer and a rectification circuit; wherein,
the power amplifier is connected with the first FPGA module through the DDS generator, the transformer is connected between the power amplifier and the rectifying circuit, and the rectifying circuit is also connected with the direct-current high-voltage bus.
5. The wire harness insulation testing device based on the direct-current high voltage as claimed in claim 3, wherein the current collection module is an AD current collection circuit.
6. The direct-current high-voltage based wire harness insulation testing device according to claim 1, wherein the relay switching module comprises a second CAN communication interface, a single chip microcomputer and a second FPGA module; wherein,
the single chip microcomputer is connected with the main control module through the second CAN communication interface;
the second FPGA module is connected with the single chip microcomputer and the wiring harness test port.
7. The direct-current high-voltage based wire harness insulation testing device according to claim 1, further comprising a display screen, wherein the display screen is connected with the upper computer, and the upper computer sends an operation command input on the display screen to the main control module.
8. The direct current high voltage based wire harness insulation test device according to claim 1, further comprising a housing, wherein the main control module, the direct current insulation test module, the bus switching module and the relay switching module are disposed in the housing; the wiring harness test port is arranged on the shell.
9. The device for testing the insulation of the wire harness based on the direct-current high voltage is characterized in that the wire harness test ports are multiple, and the tested wire harness of each wire harness test port is connected with the direct-current high voltage bus through the switching of the relay switching module.
10. The direct current high voltage based wire harness insulation testing device as claimed in claim 8, wherein a USB port is further provided on the housing, and the USB port is connected to the upper computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020988238.0U CN213069012U (en) | 2020-06-02 | 2020-06-02 | High voltage wire harness insulation testing device based on direct current |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020988238.0U CN213069012U (en) | 2020-06-02 | 2020-06-02 | High voltage wire harness insulation testing device based on direct current |
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| CN213069012U true CN213069012U (en) | 2021-04-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113533838A (en) * | 2021-07-06 | 2021-10-22 | 迪力普电子(常州)有限公司 | Wiring harness comprehensive test system and method based on FPGA |
| CN114325273A (en) * | 2022-01-10 | 2022-04-12 | 北京航天新立科技有限公司 | Insulation breakdown testing device and method based on FPGA technology |
-
2020
- 2020-06-02 CN CN202020988238.0U patent/CN213069012U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113533838A (en) * | 2021-07-06 | 2021-10-22 | 迪力普电子(常州)有限公司 | Wiring harness comprehensive test system and method based on FPGA |
| CN114325273A (en) * | 2022-01-10 | 2022-04-12 | 北京航天新立科技有限公司 | Insulation breakdown testing device and method based on FPGA technology |
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