CN221303439U - Portable multichannel test equipment for automobile electrical property test - Google Patents

Abstract

The utility model provides portable multichannel testing equipment for an automobile electrical property test, which is used for solving the technical problems of low system integration level, large equipment occupation space, complex personnel operation and low efficiency of the conventional testing equipment. The utility model comprises a cabinet, wherein the front part of the cabinet is provided with a test panel, the test panel is provided with a switch and a plurality of test areas, a case is arranged in the cabinet, a controller and an acquisition card are arranged in the case, the acquisition card is connected with a plurality of test channels of the test areas, and the switch and the acquisition card are both connected with the controller. The utility model has high system integration level, small volume, light weight and portability; the test interface is simple and easy to understand, is more standard and concise, is convenient for the operation of testers, reduces the number and operation frequency of the testers, and greatly improves the test efficiency of the experiment and the safety of data.

Description

Portable multichannel test equipment for automobile electrical property test

Technical Field

The utility model relates to the technical field of automobile electrical performance test, in particular to portable multichannel test equipment for automobile electrical performance test.

Background

With the rapid development of vehicle electrification and intelligence, the deep integration of the automobile industry and intelligent networking technology has become more and more complex and huge, so that the new innovation of E/E architecture technology has been promoted, the number of electronic elements is more and more increased, and the interaction logic between the electronic elements is more and more complex. In addition, the requirements of automobile users on the safety, stability, comfort and the like of automobiles are continuously improved, so that wire harnesses forming automobile lines are becoming more and more complex.

The automobile wire harness penetrates through the whole automobile to connect all electric equipment on the automobile and serves as a medium for power supply and signal transmission of all equipment. The automobile wire harness is a blood vessel, the automobile engine is a heart, the heart beats due to the blood vessel, the engine runs due to the wire harness, and the importance of the automobile wire harness on the normal stability of an automobile whole circuit can be seen, and if the safety of the automobile wire harness is not ensured, the safety of the automobile is avoided, so that the electric performance test of the whole automobile is particularly important.

The whole vehicle electrical performance test is to test the electrical performance of an automobile wire harness, equipment in the field of the current whole vehicle electrical performance test is mainly divided into two groups, and the equipment is distributed single equipment, such as a programmable power supply, an electronic load, current and voltage acquisition equipment, resistance measurement equipment, temperature acquisition equipment, test data acquisition, processing and analysis equipment and the like, and the equipment is characterized by single function, more required personnel and low test efficiency; the other type is large centralized test equipment, which is characterized by large occupied space, complex operation and higher requirements on personnel technical level, so that the efficiency cannot be further improved. Along with the shortening of the research and development period of automobiles and the increasing complexity of automobile electronic and electric systems, the accuracy and the test period of the whole automobile electric performance test face serious challenges, and new solutions are urgently required.

The utility model patent with the application number 201820028367.8 discloses an electric performance test device of an automobile, which comprises a cabinet body, and further comprises a power supply system, a data acquisition system, an oscilloscope and an industrial personal computer module which are arranged in the cabinet body, wherein: the power supply system is respectively connected with the electronic load equipment, the oscilloscope, the industrial personal computer module and the data acquisition system and is used for providing electric energy; the data acquisition system is provided with at least one electric signal acquisition port for acquiring part or all of current signals, voltage signals, temperature signals and data bus signals of the automobile; the oscilloscope is connected with the power supply system and is used for acquiring and displaying voltage signals of the moment of inductive load action in the automobile; the industrial personal computer module is used for controlling the data acquisition system to acquire data, receiving the current signal, the voltage signal, the temperature signal and the data bus signal, and processing, storing and displaying the current signal, the voltage signal, the temperature signal and the data bus signal. According to the data acquisition system, the data acquisition system is utilized to acquire at least one datum at a time, and the acquired data are subjected to real-time display, offline analysis and other treatments, so that the problem that the data acquisition cannot be uniformly performed in the original test program is solved, and the labor intensity of testers is greatly reduced. But the above patent is complicated to operate.

Disclosure of utility model

Aiming at the technical problems of low system integration level, large equipment occupation space, complex personnel operation and low efficiency of the conventional test equipment, the utility model provides the portable multichannel test equipment for the automobile electrical property test, which is compatible with the advantages of high integration level, small occupied space, simple personnel operation and the like of the test equipment, improves the portability of the equipment and ensures the accuracy and reliability of experimental data.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows: the utility model provides a portable multichannel test equipment for car electrical property test, includes the rack, the front portion of rack is equipped with test panel, is equipped with switch and a plurality of test area on the test panel, is equipped with the quick-witted case in the rack, and the quick-witted incasement is equipped with controller and acquisition card, and the acquisition card is connected with a plurality of test channels in test area, and switch and acquisition card all are connected with the controller.

Preferably, an oscilloscope collecting area, a digital multimeter collecting area, a voltage collecting area, a temperature collecting area, a current collecting area and a communication testing area are arranged on the testing panel, and the oscilloscope collecting area, the digital multimeter collecting area, the voltage collecting area, the temperature collecting area, the current collecting area and the communication testing area are all connected with the collecting card.

Preferably, the chassis is an NI PXIe-1082 chassis, and the controller is an NI PXIe-8840 system embedded controller.

Preferably, the controller comprises a USB port and a DP interface, the USB port is respectively connected with the first USB transmission interface and the second USB transmission interface, and the DP interface is connected with the video interface; the first USB transmission interface, the second USB transmission interface and the video interface are all arranged on the back of the cabinet.

Preferably, an operation switch is arranged on the test panel, a power main switch and a video interface are arranged at the rear part of the cabinet, and the power main switch is connected with the mains supply through a power input port; the video interface can be connected with the display screen, and the video interface, the operation switch and the power supply main switch are all connected with the cabinet.

Preferably, the acquisition card is provided with a PXI oscilloscope, a DMM module, a PXIe analog input module, a PXIe multifunctional I/O module, a PXIe automobile multi-protocol interface module and a PXI temperature input module, wherein the PXI oscilloscope, the DMM module, the PXIe analog input module, the PXIe multifunctional I/O module, the PXIe automobile multi-protocol interface module and the PXI temperature input module are all connected with the case to realize mutual communication; the PXI oscilloscope, the DMM module, the PXIe analog input module, the PXIe multifunctional I/O module, the PXIe automobile multi-protocol interface module and the PXI temperature input module are all connected with the test channels on the test panel at the front part of the cabinet.

Preferably, the temperature acquisition area comprises a plurality of test channels I, and the test channels I are respectively connected with an acquisition line of the temperature sensor and the PXI temperature input module; the voltage acquisition area comprises a plurality of test channels II, the test channels II are externally connected with a voltage clamp, the test channels II are connected with a PXIe analog input module, and the PXIe analog input module adopts an analog input acquisition card of NI; the current collection area comprises a plurality of current collection channels, the current collection channels are respectively connected with the current clamp and the PXIe multifunctional I/O module, and the PXIe multifunctional I/O module adopts a multifunctional I/O collection card.

Preferably, the digital multimeter acquisition area is provided with two groups of test ports, the test ports are connected with a DMM module, the DMM module adopts a digital multimeter, and the digital multimeter has the measurement functions of the DMM and the digitizer; and the test port of the oscilloscope acquisition area is connected with the PXI oscilloscope.

Preferably, the PXI temperature input module is a temperature acquisition card, and the temperature acquisition card is a constant-temperature junction box; the controller is respectively connected with the custom signal conditioning module, the custom signal control module and the LEM sensor module.

Preferably, the communication test area comprises a CAN communication interface and a LIN communication interface, wherein the CAN communication interface and the LIN communication interface are connected with PXLe-8510 controllers, and the PXLe-8510 controllers are connected with the chassis.

Compared with the prior art, the utility model has the beneficial effects that: the method can be completed by the following steps: the method comprises the following experimental items of a whole vehicle loop current test, a whole vehicle loop voltage drop test, a whole vehicle overload test, a whole vehicle short circuit test, a whole vehicle grounding suspension voltage test, a whole vehicle grounding interference test, a whole vehicle grounding current test, a whole vehicle grounding failure test, a whole vehicle load rejection influence test, a whole vehicle inductive load influence test, a whole vehicle wire harness temperature rise test, a whole vehicle wire harness loop resistance test, a whole vehicle starting performance test, a whole vehicle electric balance test, a whole vehicle and controller static current test, a whole vehicle CAN/LIN network test and the like, so that engineering technicians are effectively assisted to verify the reliability of the whole vehicle loop, improve the accuracy of wire harness design, ensure the safety of wire harnesses and the whole vehicle, and increase the safety coefficient of the vehicle.

(1) The utility model solves the problems of dispersion or huge volume and inconvenient carrying of the existing commercial test equipment, and the utility model has the advantages of high system integration level, small volume, light weight and convenient carrying;

(2) Compared with different operating systems of the original equipment, the operation interface is unified, the test interface is concise and easy to understand, is more standard and concise, is convenient for test personnel to operate, reduces the number of the test personnel and operation frequency, simultaneously has the report template for report export and storage, and greatly improves the test efficiency of the experiment and the safety of data.

(3) On the advantage of small volume, configured portable display screen simultaneously, the software is run in this portable equipment, controls, records and keeps the test, has further promoted efficiency of software testing and portability.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a rear view of fig. 1.

Fig. 3 is a schematic view of the internal structure of the present utility model.

In the figure, 1 is an operation switch, 2 is an oscilloscope acquisition area, 3 is a digital multimeter acquisition area, 4 is a voltage acquisition area, 5 is a temperature acquisition area, 6 is a CAN communication interface, 7 is a LIN communication interface, 8 is a current test panel, 9 is a cabinet, 10 is a power supply main switch, 11 is a video interface, 12 is a network interface, 13 is a second USB transmission interface, 14 is a first USB transmission interface, 15 is a case, and 16 is a controller.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to be within the scope of the utility model.

As shown in FIG. 1, the portable multichannel test equipment for the automobile electrical performance test comprises a cabinet 9, wherein the length, width and height of the cabinet 9 are 600mm multiplied by 450mm multiplied by 368mm, and the equipment is made of light high-strength materials and is convenient to carry. The cabinet 9 is internally provided with a cabinet 15, the cabinet 15 is PXIe (PCI Extensions for Instrumentation), the PXIe cabinet is a portable cabinet, and the PXIe cabinet is a PXIe-1082 cabinet, so that the requirements of various high-performance test and measurement applications can be met.

As shown in FIG. 3, a controller 16 is disposed in the chassis 15, the controller 16 is a PXI system embedded controller PXIe-8840, the PXI system embedded controller PXIe-8840 is mainly used for processor intensive, modularized instrument and data acquisition applications, and the controller 16 comprises two 10/100/1000 BASE-TX Ethernet ports, two USB3.0 ports and four USB2.0 ports, and an integrated hard disk drive, serial ports and other peripheral I/O. Integrated hard disk drives are mainly used for storing and retrieving digital information. The serial port is an expansion interface adopting a serial communication method. Other peripheral I/O provides multi-channel digital input and output functions for interfacing with and controlling external digital devices.

The controller 16 is connected to an acquisition card for data acquisition. The controller 16 and the acquisition cards are core areas for signal control and data acquisition and are responsible for switching related equipment and circuits, the controller 16 realizes communication with each acquisition card through the PXIe-1082 chassis, accurate acquisition of test data signals is ensured, and different circuit connection schemes are carried out for different test projects.

The acquisition card comprises PXI (PCI Extensions for Instrumentation) oscilloscopes, a DMM (Digital Multi-meter) module, a PXIe analog input module, a PXIe multifunctional I/O module, a PXIe automobile Multi-protocol interface module and a PXI temperature input module. The PXI oscilloscope, the DMM module, the PXIe analog input module, the PXIe multifunctional I/O module, the PXIe automobile multi-protocol interface module and the PXI temperature input module are communicated with the controller 16 through the case 15. The PXI oscilloscope is externally connected to the portable cabinet 9 through a special line; the DMM module is externally connected to the cabinet 9 through a special wire, the PXIe automobile multi-protocol interface module is externally connected to the cabinet 9 through a special wire, the PXIe analog input module is externally connected to the cabinet 9 through a special wire, the PXIe multifunctional I/O module is externally connected to the cabinet 9 through a special wire, the PXI temperature input module is a temperature acquisition card PXIe-4353, the temperature acquisition card PXIe-4353 is an NI TB-4353 constant temperature junction box, and the thermal conductivity between a thermocouple terminal and a cold end compensation channel can be optimized.

The controller 16 communicates with the custom signal conditioning module, custom signal control module, and LEM sensor module via the PXIe-1082 chassis 15, respectively. The customized signal conditioning module realizes the functions of signal control, switching and conditioning. The custom signal control module coordinates the acquisition control of all signals. The LEM sensor module assists the NI controller 16 in completing the test items with the acquisition card. The software is independently operated in the portable equipment, so that the control, recording and storage of specific tests are realized, and a specified experiment report is output, thereby being convenient for timely storage and carrying.

As shown in fig. 1, a test panel is arranged at the front part of a cabinet 9, and an operation switch 1, an oscilloscope collecting area 2, a digital multimeter collecting area 3, a voltage collecting area 4, a temperature collecting area 5, a CAN communication interface 6, a LIN communication interface 7 and a current collecting area 8 of the cabinet device are arranged on the test panel. The operation switch 1, the oscilloscope acquisition area 2, the digital multimeter acquisition area 3, the voltage acquisition area 4, the temperature acquisition area 5, the CAN communication interface 6, the LIN communication interface 7 and the current acquisition area 8 are all connected with an acquisition card in the case 15. The operation switch 1 is used for controlling the opening and closing of the whole cabinet 9, and the functions of the oscilloscope acquisition area 2, the digital multimeter acquisition area 3, the voltage acquisition area 4, the temperature acquisition area 5, the CAN communication interface 6, the LIN communication interface 7 and the current acquisition area 8 are respectively oscilloscope test, digital multimeter test, voltage test, temperature test and communication test. The test panel is a core area of the whole test equipment and is the most critical part of the whole test equipment, and the use accuracy of the test panel has a great influence on the whole test process, so that the test panel is required to be operated according to the test requirements when in use.

The temperature acquisition area 5 comprises 30 test channels T1-T30, the 30 test channels are respectively connected with 30 paths of external temperature sensor test lines, and the temperature acquisition channels are connected with PXI temperature input modules PXIe-4353 in the case 15. And simultaneously, 30 paths of temperature sensor acquisition lines are provided for multi-channel testing. The NI PXIe-4353 temperature input module not only has 2 paths of automatic zero setting channels for offset compensation, but also has thermocouple open circuit detection for identifying disconnected thermocouples, so that smooth and effective test is well ensured, and the test efficiency is improved. The PXI temperature input module uses an NI TB-4353 constant temperature junction box, and the NI TB-4353 constant temperature junction box can optimize the thermal conductivity between a thermocouple terminal and a cold end compensation channel to enable the thermal conductivity to be extremely high in precision.

The voltage acquisition area 4 comprises an 8-channel 60V test channel, the test channel can be externally connected with a voltage clamp, the test channel is connected with a PXIe analog input module, and the PXIe analog input module adopts an NI analog input module NI-9221.

For the safety of the device, the red terminal of each channel of the voltage acquisition area 4 needs to be connected to the power supply terminal of the device to be tested, and the black terminal needs to be connected to the ground terminal of the device to be tested. Particularly, the positive and negative channels cannot be connected reversely during multi-channel measurement, and the instant current is very large after the connection reversely, so that the equipment is damaged. The measuring range of the voltage clamp is particularly paid attention to during testing, and a proper voltage clamp is selected and matched with a proper testing channel, so that equipment is damaged when the measuring range is exceeded.

The current collection area 8 comprises a current collection channel of 8 channels, the current collection channel is connected with a current clamp, the current collection channel is connected with a data collection wiring terminal board SCSI-68M-D, the data collection wiring terminal board SCSI-68M-D is connected with a PXIe multifunctional I/O module PXIe-6386, and for micro current signals, collection can be achieved by combining a high-precision current clamp with a multifunctional I/O collection card NI PXIe-6386 with a current conditioning control module. When in use, the measurement is carried out strictly according to the connection mode of the current red terminal and the black terminal, and meanwhile, special attention is required not to exceed the corresponding test range.

The digital multimeter acquisition area 3 is provided with two groups of test ports, the test ports are connected with a DMM module, the DMM module adopts the most accurate digital multimeter NI PXI-4071 in the industry, and the measurement functions of two common instruments are provided: 1000V high resolution DMM and digitizer. When the digital multimeter PXI-4071 is used as a DMM, the digital multimeter PXI-4071 can provide quick and accurate AC/DC voltage, AC/DC current, 2-wire or 4-wire resistance, frequency/period measurement and diode test, can realize wide-range acquisition of voltage signals, and can acquire tiny current change of a loop by means of the digital multimeter NI PXI-4071 under the condition of conveniently connecting circuits in series. In the high voltage isolated digitizer mode, the digital multimeter PXI-4071 can acquire waveforms at a sample rate of 1.8 MS/s.

The test port of the oscilloscope acquisition area 2 is connected with a PXI oscilloscope, the PXI oscilloscope adopts an NI PXIe-5160, 500MHz,2.5GS/s and 10-bit PXI oscilloscope, and provides 2 test channels of 50Ω/5 VMAX and 1MΩ/42 VMAX, and the PXI oscilloscope can be externally connected with a current probe to acquire high-speed current signals and can be externally connected with a voltage probe to acquire high-speed voltage signals. When the device is used, the device is tested strictly according to the measuring range so as to prevent damage to an oscilloscope acquisition card (NI PXIe-5160) in the testing process; meanwhile, in order to ensure that the test is carried out smoothly, a corresponding attenuation meter pen can be selected.

The CAN communication interface 6 and the LIN communication interface 7 are communication test areas: the CAN communication interface 6 and the LIN communication interface 7 are both connected with PXLe-8510 controllers, the PXLe-8510 controllers are connected with the case 15, the communication with the controller 16 is realized through the case 15, the PXLe-8510 controllers provide 1-way CAN and 1-way LIN, the 1-way CAN is connected with the CAN communication interface 6, and the LIN communication interface 7 is connected with the 1-way LIN. The PXLe-8510 controller is a hardware-selectable control area network and local interconnect network interface, which CAN enable the on-board processor to transmit CAN frames and signals between the interface and the user program without interrupting the CPU, thereby minimizing message delay and allowing the host processor time to process complex models and applications.

As shown in fig. 2, a power main switch 10, a video interface 11, a network interface 12, a first USB transmission interface 14 and a second USB transmission interface 13 are arranged on the back of the cabinet 9, and can be externally connected with a mouse keyboard or a USB disk for data backrest, the power main switch 10 is connected with a power input port (220 v,50 hz), the power input port is connected with the mains supply, and the power supply mode adopts an alternating current power supply mode. The two USB transfer interfaces are connected to USB ports of the controller 16 for data transfer. The video interface 11 is connected with the DP interface of the controller 16, the video interface 11 is connected with a portable display screen, and the display of the acquired data is realized through the interface 11.

The test panel comprises temperature acquisition, voltage acquisition, current acquisition, digital multimeter acquisition, oscilloscope acquisition, CAN communication interface and LIN communication interface. The test panel is reasonable in arrangement, accords with man-machine interaction, organically integrates control, acquisition and communication, is light and moderate in weight, is provided with a portable display screen and a mouse keyboard, and is convenient to carry out the test.

The display mode of the utility model supports an external display screen, and the tested data is stored in the portable equipment, so that the safety and portability of the data are improved. The acquisition card supports the zeroing function, prevents zero drift from occurring in the testing process, influences the testing precision, and the related functions can be realized through the existing software; meanwhile, the matched current clamp is provided with a zeroing button, and zeroing work of the current clamp is completed before formal test, so that a test result is more accurate, and meanwhile, software can be confirmed in subsequent debugging.

The use conditions of the test equipment of the utility model are as follows:

(1) Experimental vehicle type: passenger cars and trucks;

(2) Starting-up operation temperature: 0-55 ℃;

(3) Ambient temperature: -30-60 ℃.

The application method of the utility model comprises the following steps:

Step S1: first, 220V power is connected while the power main switch 10 is turned on, and then the operation switch 1 is pressed to supply power to the entire system.

Step S2: after the test equipment is started, the software is opened to set voltage and current parameters required by the test, and corresponding test channels are selected through the test panel.

Step S3: and connecting corresponding test areas according to the tested items.

The method comprises the following experimental items of a whole vehicle loop current test, a whole vehicle loop voltage drop test, a whole vehicle overload test, a whole vehicle short circuit test, a whole vehicle grounding suspension voltage test, a whole vehicle grounding interference test, a whole vehicle grounding current test, a whole vehicle grounding failure test, a whole vehicle load rejection influence test, a whole vehicle inductive load influence test, a whole vehicle wire harness temperature rise test, a whole vehicle wire harness resistance test, a whole vehicle starting performance test, a whole vehicle electric balance test, a whole vehicle controller static current test, a whole vehicle CAN/LIN network test and the like.

Step S4: the voltage, current and temperature data acquired during testing are transmitted to the controller 16 through the collection card of each module through the chassis 15, and the result is presented on the designed software interface after data processing.

Step S5: after the test is completed, the equipment operation switch 1 is turned off, the system power main switch 10 is turned off, and the 220V power socket is pulled out.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A portable multichannel test equipment for automobile electrical property test, includes rack (9), its characterized in that, the front portion of rack (9) is equipped with test panel, is equipped with switch and a plurality of test area on the test panel, is equipped with quick-witted case (15) in rack (9), is equipped with controller (16) and acquisition card in machine case (15), and the acquisition card is connected with a plurality of test channel in test area, and switch and acquisition card are all connected with controller (16).

2. The portable multichannel test device for the automobile electrical property test according to claim 1, wherein an oscilloscope collection area (2), a digital multimeter collection area (3), a voltage collection area (4), a temperature collection area (5), a current collection area (8) and a communication test area are arranged on the test panel, and the oscilloscope collection area (2), the digital multimeter collection area (3), the voltage collection area (4), the temperature collection area (5), the current collection area (8) and the communication test area are all connected with the collection card.

3. The portable multi-channel test device for automotive electrical performance testing of claim 2, wherein the chassis (15) is an NI PXIe-1082 chassis and the controller (16) is an NI PXIe-8840 system embedded controller.

4. A portable multi-channel test device for automotive electrical performance testing according to claim 3, characterized in that the controller (16) comprises a USB port and a DP interface, the USB port being connected to the first USB transmission interface (14) and the second USB transmission interface (13), respectively, the DP interface being connected to the video interface (11); the first USB transmission interface (14), the second USB transmission interface (13) and the video interface (11) are all arranged on the back of the cabinet (9).

5. The portable multichannel testing device for automobile electrical performance test of claim 4, wherein the testing panel is provided with an operation switch (1), the rear part of the cabinet (9) is provided with a power main switch (10) and a video interface (11), and the power main switch (10) is connected with the mains supply through a power input port; the video interface (11) can be connected with a display screen, and the video interface (11), the operation switch (1) and the power main switch (10) are all connected with the cabinet (9).

6. The portable multi-channel test device for electrical performance test of automobile according to claim 2 or 5, wherein the acquisition card is provided with a PXI oscilloscope, a DMM module, a PXIe analog input module, a PXIe multi-function I/O module, a PXIe automobile multi-protocol interface module and a PXIe temperature input module, and the PXIe oscilloscope, the DMM module, the PXIe analog input module, the PXIe multi-function I/O module, the PXIe automobile multi-protocol interface module and the PXIe temperature input module are all connected with the chassis (15) to realize mutual communication; the PXI oscilloscope, the DMM module, the PXIe analog input module, the PXIe multifunctional I/O module, the PXIe automobile multi-protocol interface module and the PXI temperature input module are all connected with a test channel on a test panel at the front part of the cabinet (9).

7. The portable multi-channel test device for electrical performance testing of automobiles according to claim 6, wherein the temperature acquisition zone (5) comprises a plurality of test channels I respectively connected with the acquisition line of the temperature sensor and the PXI temperature input module; the voltage acquisition area (4) comprises a plurality of test channels II, the test channels II are externally connected with a voltage clamp, the test channels II are connected with a PXIe analog input module, and the PXIe analog input module adopts an analog input acquisition card of NI; the current collection area (8) comprises a plurality of current collection channels, the current collection channels are respectively connected with the current clamp and the PXIe multifunctional I/O module, and the PXIe multifunctional I/O module adopts a multifunctional I/O collection card.

8. The portable multichannel testing device for automobile electrical performance test of claim 6, wherein the digital multimeter acquisition area (3) is provided with two groups of testing ports, the testing ports are connected with a DMM module, the DMM module adopts a digital multimeter, and the digital multimeter has the measuring functions of a DMM and a digitizer; and the test port of the oscilloscope acquisition area (2) is connected with the PXI oscilloscope.

9. The portable multichannel testing apparatus for automotive electrical performance testing of claim 7, wherein the PXI temperature input module is a temperature acquisition card, the temperature acquisition card being a constant temperature junction box; the controller (16) is respectively connected with the custom signal conditioning module, the custom signal control module and the LEM sensor module.

10. Portable multi-channel test device for electrical performance testing of vehicles according to any of claims 7-9, characterized in that the communication test zone comprises a CAN communication interface (6) and a LIN communication interface (7), both CAN communication interface (6) and LIN communication interface (7) being connected to PXLe-8510 controller, PXLe-8510 controller being connected to the chassis (15).