CN211627797U - Testing device for portable multi-channel insulation monitoring system - Google Patents
Testing device for portable multi-channel insulation monitoring system Download PDFInfo
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- CN211627797U CN211627797U CN201922223528.6U CN201922223528U CN211627797U CN 211627797 U CN211627797 U CN 211627797U CN 201922223528 U CN201922223528 U CN 201922223528U CN 211627797 U CN211627797 U CN 211627797U
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Abstract
The test device for the portable multi-path insulation monitoring system comprises an upper computer, a main control module, a conversion interface, a power supply module, a main communication module, an adjustable resistor and a switching module. The upper computer is connected to the CAN bus through the USB-CAN; the main control module is connected with the power supply module, the main communication module and the switching module; the main communication module is connected with the CAN bus and the main control module; the adjustable resistor is connected to the switching module; the switching module is connected to the conversion interface. The insulation tester is verified by changing the adjustable resistance box, and the multi-path verification is realized by changing the access point of the resistance box through the switching module, so that the accuracy of the insulation detection warning information of the electric vehicle system is improved, the verification efficiency is greatly improved, and the potential safety hazard is effectively eliminated.
Description
Technical Field
The utility model relates to a testing arrangement for portable multichannel insulation monitoring system.
Background
At present, an electric automobile must be provided with an insulation monitoring system, particularly an IT electric system with multiple insulation, such as a double-source trackless trolley bus with isolated DC/DC, which is provided with a plurality of sets of insulation monitoring systems. When the vehicle runs, if the insulation resistance is monitored to be lower than a certain threshold value, the insulation monitor transmits data to the vehicle controller, and the vehicle controller executes a corresponding command to ensure the safe work of the electric vehicle. When the insulation detection system breaks down, the insulation detection system cannot monitor correct insulation resistance or cannot transmit correct signals to the whole vehicle controller, and great hidden danger exists for vehicle and personal safety.
At present, a general insulation monitoring system is checked by connecting a resistor with a specific resistance value to a monitoring point of an insulation monitoring loop, and then, changing the resistance value of the resistor and observing the running state of the system.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is overcome the defect among the above-mentioned prior art, provide a testing arrangement for portable multichannel insulation monitoring system, it has reduced the required instrument quantity of test, has reduced the step of test, has improved efficiency and precision to multichannel insulation monitoring system's test, and then has effectively guaranteed electric automobile insulation monitoring system's reliability.
In order to solve the technical problem, the utility model provides a technical scheme does:
the utility model provides a testing arrangement for portable multichannel insulation monitoring system, insulation monitoring system has CAN communication module, at least one detection interface, testing arrangement includes test box and host computer, a serial communication port, the test box includes main control module, conversion interface, main communication module, the host computer pass through the CAN bus respectively with main communication module with CAN communication module communicates, the conversion interface with at least one detection interface connection, CAN communication module passes through the conversion interface links to each other with the CAN bus.
Further, the conversion interface is divided into three lines A, B, C, one end of the line a is used for connecting a power supply interface of the insulation monitoring system, and the other end of the line a is connected to a power supply module inside the test box; one end of the line B is connected with at least one detection interface of the insulation monitoring system, and the other end of the line B is connected with a switching module in the test box; one end of the line C is connected with the CAN communication module of the insulation monitoring system, and the other end of the line C is connected with the CAN bus.
Furthermore, the test box also comprises an adjustable resistor, the switching module comprises a multi-path relay module, and the main control module can control the on-off of an internal relay so as to selectively connect the adjustable resistor to a corresponding detection line.
Furthermore, the resistance value range of the adjustable resistor is adjusted in a stepping mode by taking 1 ohm as a unit between 0 and 100M ohms, and the resistor precision is not larger than 1%.
Furthermore, the test box also comprises a power module, and the power module supplies power to the main control module, the main communication module and the switching module.
Further, the power modules include a 220Vac to 24Vdc power supply and a lithium ion battery module.
Furthermore, the main control module comprises a main control module power supply, a main control chip and a relay switching value output circuit.
Compared with the prior art, the utility model has the advantages of:
(1) the tester only needs to carry out simple operation through the host computer, can realize convenient operation, weak point consuming time, efficient to the test of whole insulation monitoring system.
(2) The utility model discloses can semi-automatic accomplish the monitoring of insulation monitoring system function, get rid of most human factor interference to the accuracy of test has been improved greatly.
(3) The test requirements of different insulation monitoring systems can be met by simply adjusting the upper computer and the conversion interface, and the universality is high. Especially in some IT electrical systems with multiple insulation, such as a double-source trolley bus with isolated DC/DC, the insulation resistance values of a plurality of monitoring positions can be tested.
Drawings
The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:
fig. 1 is a schematic structural diagram of the testing device of the present invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.
On the other hand, terms used in the present specification are used to illustrate the embodiments, and do not limit the present invention. In this specification, the singular forms also include the plural forms as long as they are not specifically referred to in the sentence. The terms "comprises" and/or "comprising" as used herein, are intended to indicate that the recited elements, steps, acts, and/or components do not preclude the presence or addition of one or more other elements, steps, acts, and/or components. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, an object of the utility model is to provide a testing arrangement for insulating monitoring system of portable multichannel mainly tests insulating monitoring system, and this testing arrangement includes host computer and test box.
The upper computer is provided with a USB-CAN conversion module, one end of the USB-CAN conversion module is connected with the CAN bus, the other end of the USB-CAN conversion module is connected with the upper computer, and data conversion and transmission between the USB and the CAN bus CAN be realized through the USB-CAN conversion module.
The test box comprises a main control module, a conversion interface, a power supply module, a main communication module, an adjustable resistor and a switching module. The power supply module is respectively connected with the conversion interface, the switching module and the main control module and provides power for the switching module and the main control module. The main communication module is connected to the CAN bus.
The conversion interface is divided into three lines A, B, C, one end of the line A is used for connecting a power supply interface of the insulation monitoring system, and the other end of the line A is connected to a power supply module in the test box to provide working power supply for the insulation monitoring system; one end of the line B is connected with a plurality of detection interfaces of the insulation monitoring system, the other end of the line B is connected with a switching module in the test box, and the connected monitoring interfaces can be changed by changing the on-off state in the switching module; one end of the line C is connected with a CAN communication module of the insulation monitoring system, and the other end of the line C is connected with a CAN bus, so that the communication with an upper computer CAN be realized.
The power module comprises a 220Vac to 24Vdc power supply and a group of battery modules, a main output end of the power module is connected with a 10A self-recovery fuse in series to ensure that the whole testing device is protected when short circuit occurs, and the power module supplies power to the main control module and also provides a relay switching power supply for the switching module.
The insulation monitoring system is provided with a CAN communication module, and the CAN communication module is communicated with an upper computer through a CAN bus.
The adjustable resistor is connected into the switching module, and the adjustable resistor is connected into different monitoring interfaces of the insulation monitoring system by changing the connection relation of the relay in the switching module.
Before testing, the interfaces of the insulation monitoring system and the conversion interfaces of the test box are in one-to-one butt joint through the wiring harness, and the USB-CAN is connected with the upper computer. After the test is started, the power switch is turned on, the resistance value of the adjustable resistor is adjusted to a specific value, and the main control module controls the switching module to access the adjustable resistor to the detection interface of the insulation monitoring system according to the command of the upper computer. The insulation monitoring system starts to detect the insulation resistance value accessed by the detection interface, after the detection is completed, the resistance value information and the alarm information are sent to the CAN bus through the CAN communication module, the upper computer reads the resistance value information and then displays the information on a screen, and whether the insulation resistance value of the insulation monitoring system is accurate or not is judged by comparing the resistance value with the set adjustable resistance value. And then the adjustable resistor can be adjusted to different resistance values to judge whether the alarm point of the insulation monitoring system is accurate and reliable.
The main control module comprises a main control module power supply, a main control chip and a relay switching value output circuit.
The host computer may be, for example, a computer (computer).
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The invention is not limited to the embodiments described herein, but is capable of other embodiments according to the invention, and may be used in various other applications, including, but not limited to, industrial. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still fall within the protection scope of the technical solution of the present invention, where the technical entity does not depart from the content of the technical solution of the present invention.
Claims (7)
1. The utility model provides a testing arrangement for portable multichannel insulation monitoring system, insulation monitoring system has CAN communication module, at least one detection interface, testing arrangement includes test box and host computer, a serial communication port, the test box includes main control module, conversion interface, main communication module, the host computer pass through the CAN bus respectively with main communication module with CAN communication module communicates, the conversion interface with at least one detection interface connection, CAN communication module passes through the conversion interface links to each other with the CAN bus.
2. The test apparatus of claim 1, wherein the conversion interface is divided into three lines A, B, C,
one end of the circuit A is used for being connected with a power supply interface of the insulation monitoring system, and the other end of the circuit A is connected to a power supply module inside the test box;
one end of the line B is connected with at least one detection interface of the insulation monitoring system, and the other end of the line B is connected with a switching module in the test box;
one end of the line C is connected with the CAN communication module of the insulation monitoring system, and the other end of the line C is connected with the CAN bus.
3. The testing device of claim 2, wherein the testing box further comprises an adjustable resistor, the switching module comprises a multi-way relay module, and the main control module can control the on/off of an internal relay so as to selectively connect the adjustable resistor to a corresponding detection line.
4. The testing device of claim 3, wherein the adjustable resistor has a resistance value ranging from 0 to 100M ohms and is adjusted in steps of 1 ohm, and the resistance precision is not greater than 1%.
5. The testing device of any one of claims 2-4, wherein the testing box further comprises a power module that supplies power to the main control module, the main communication module, and the switching module.
6. The testing device of any of claims 2-4, wherein the power module comprises a 220Vac to 24Vdc power supply and a lithium ion battery module.
7. The testing device of any one of claims 1-3, wherein the main control module comprises a main control module power supply, a main control chip, and a relay switching value output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922223528.6U CN211627797U (en) | 2019-12-12 | 2019-12-12 | Testing device for portable multi-channel insulation monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922223528.6U CN211627797U (en) | 2019-12-12 | 2019-12-12 | Testing device for portable multi-channel insulation monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211627797U true CN211627797U (en) | 2020-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922223528.6U Active CN211627797U (en) | 2019-12-12 | 2019-12-12 | Testing device for portable multi-channel insulation monitoring system |
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| Country | Link |
|---|---|
| CN (1) | CN211627797U (en) |
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2019
- 2019-12-12 CN CN201922223528.6U patent/CN211627797U/en active Active
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