CN218995932U

CN218995932U - Data acquisition system for test vehicle

Info

Publication number: CN218995932U
Application number: CN202221630003.XU
Authority: CN
Inventors: 徐驰; 宋玮航
Original assignee: Shanghai Hanzhi Electronic Technology Co ltd
Current assignee: Shanghai Hanzhi Electronic Technology Co ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2023-05-09
Anticipated expiration: 2032-06-28

Abstract

The utility model discloses a data acquisition system for a test vehicle, which comprises: the testing cabinet is internally provided with an analysis instrument, a junction box linearly connected with the analysis instrument and communication equipment, wherein the analysis instrument is internally provided with an acquisition unit and a bus unit, the bus unit is electrically connected with the client through the communication equipment, and the analysis instrument is used for acquiring data of a tested object and delivering analysis results after analysis and calculation of the data; the junction box integrates a sensor function so as to detect data of a tested car; and the client is used for remotely controlling the operation of the analysis instrument and receiving the analysis result sent by the analysis instrument. The test vehicle management system is compact in structure and convenient to install, data support is provided for planning, approval and test project execution conditions of the test vehicle, the development cost of the whole vehicle is reduced, and the test vehicle management system can be widely applied to the vehicle market.

Description

Data acquisition system for test vehicle

Technical Field

The utility model relates to the technical field of automobile tests, in particular to a data acquisition system for a test car.

Background

With the rapid development of the automobile industry, the marketing speed, price and market public praise of a new vehicle model of a vehicle enterprise are fundamental to the establishment of the enterprise. The cost, test period and test effect of the test vehicle are key factors influencing the market speed, price and market praise of new vehicle types. While the requirements of each specialty are fully considered when a lot of vehicle enterprises plan the quantity and the configuration of test vehicles, each specialty generally reports the requirements of the test vehicles according to the longest period, so that in the actual use process, some vehicles always have overtime due to various factors, and some vehicles finish verification in advance, and some problems found and solved in the test stage after the vehicles are marketed are not solved, but flow into the hands of users, so that bad market public praise is brought. Because the whole process of the test vehicle is not monitored in real time, the test vehicle cannot be detected in a full performance index, and the test is not thoroughly carried out because the test is not fully known in the running condition. On the one hand, the method wastes resources, increases development cost and affects performance, and on the other hand, the development period of the whole project is affected because the method can not meet the sudden vehicle demands.

Current test car supervision is simply to install an OBD diagnostic box on the car, and determine whether the car has moved or deviated from the test area by the GPS track change and the diagnostic information of a small portion of the diagnostic CAN. The actual use state of the vehicle and the vehicle condition information representing the actual state information of the vehicle are not regulated.

In view of the foregoing, there is a need in the market today to develop a system for collecting various physical quantities of a test vehicle, including measurement, storage and data analysis of signals of angle, pressure, strain, displacement, temperature, etc., so as to enhance monitoring and management of the test vehicle.

Disclosure of Invention

There is currently a lack of systems on the market that supervise the actual usage status of the vehicle and the vehicle condition information characterizing the actual status information of the vehicle.

For solving the technical problem, the application provides a data acquisition system for a test car, which comprises: the testing cabinet is internally provided with an analysis instrument, a junction box linearly connected with the analysis instrument and communication equipment, wherein the analysis instrument is internally provided with an acquisition unit and a bus unit, the bus unit is electrically connected with the client through the communication equipment, and the analysis instrument is used for acquiring data of a tested object and delivering analysis results after analysis and calculation of the data; the junction box integrates a sensor function so as to detect data of a tested car; and the client is used for remotely controlling the operation of the analysis instrument and receiving the analysis result sent by the analysis instrument.

According to embodiments of the present application, the junction box integrates the functions of angle, pressure, strain, displacement, and temperature sensors.

According to the embodiment of the application, the displacement sensor adopts a magnetic grid type sensor, and the angle sensor adopts a six-component force sensor.

According to the embodiment of the application, the junction box is also internally provided with a GPS positioning device, the input end of the GPS positioning device is connected with a GPS antenna, and the output end of the GPS positioning device is connected with the client.

According to the embodiment of the application, the test cabinet is a vibration reduction cabinet and is fixedly arranged on a tested car.

According to the embodiment of the application, the 4G router is adopted by the communication equipment.

According to the embodiment of the application, the client comprises a tablet computer and a smart phone.

According to embodiments of the present application, the analysis instrument employs a PXI instrument that combines the electrical bus characteristics of PCI with the modular and Eurocard mechanical packaging characteristics of compactPCI, and adds a specialized synchronization bus.

According to the embodiment of the application, the analysis instrument is built by a platform of a PXI bus, a host computer of the analysis instrument is PXIe-8861, and a case of the analysis instrument is PXIe-1095.

According to the embodiment of the application, the software of the acquisition unit is developed based on NI flexlog, and supports the functions of setting before acquisition, control and display in acquisition and review and export after acquisition.

Compared with the prior art, the technical scheme of the utility model has the beneficial effects that:

1. according to the utility model, on a test vehicle, various braking working conditions of the vehicle during running are repeatedly simulated and reproduced on the basis of a chassis dynamometer, related parameters are measured by using a sensor, sensor data are acquired by using a data acquisition device, the related data are read by using a communication device and sent to an upper computer, and the upper computer obtains the braking working condition of the whole vehicle after judging; the method eliminates the influence of factors such as environment, region and the like, improves the universality of the test and the comparability of the test result, and has the advantages of high selectivity of the test object, convenient implementation, high precision and low cost. The design scheme greatly promotes the discovery and the solution of the problems of enterprises in the development and the later optimization of new vehicles, and has great significance in improving the independent design development capability and the manufacturing level.

2. The utility model realizes the functions of inquiring the information of the test vehicle, monitoring the test items by collecting, uploading, storing and analyzing and modeling the vehicle condition data of the test vehicle, and the like, and provides data support for planning, examining and approving, borrowing and executing the test items of the test vehicle.

Drawings

FIG. 1 is a block diagram of a data acquisition system for a test vehicle according to the present utility model;

FIG. 2 is a block diagram of the data acquisition system for a test vehicle according to the present utility model;

FIG. 3 is a block diagram of a flow chart of the use of a data acquisition system for a test vehicle according to the present utility model.

The specific embodiment is as follows:

the utility model will be further described with reference to the drawings and the specific examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

Referring to fig. 1 and 2, a data acquisition system for a test vehicle includes a test cabinet, a client, and a communication device for communicating the test cabinet and the client through the internet. The test cabinet is installed on the test car for use, and the client side realizes remote control.

And the testing cabinet is internally provided with an analysis instrument, a junction box linearly connected with the analysis instrument and communication equipment. The analysis instrument is internally provided with an acquisition unit and a bus unit, the bus unit is electrically connected with the client through communication equipment, and the analysis instrument is used for acquiring data of a tested object, analyzing and calculating the data and then conveying analysis results; the junction box integrates sensor functions to detect data of the test vehicle under test.

Further, the junction box integrates functions of angle, pressure, strain, displacement and temperature sensors, and detection signals comprise strain acquisition signals, voltage acquisition signals, TTL square wave signals, 422/485 signals, GPS signals, software version numbers and the like. According to the requirements of the channel number acquired by the sensor, the types of the acquisition modules are selected as shown in the following table:

table 1: vehicle condition signal list

Further, the displacement sensor adopts a magnetic grating sensor for testing the rotation angle of the wheels of the test vehicle, and each test wheel corresponds to one magnetic grating sensor, preferably two specifications of a circular magnetic grating ruler NTDS1-D40-12-82-2048 and a circular magnetic grating ruler NTDS1-D28-16-82-2048, and specifically comprises one circular magnetic grating ruler of NTDS1-D40-12-82-2048 and two circular magnetic grating rules of NTDS 1-D28-16-82-2048.

Further, the angle sensor adopts six-component force sensors and is used for testing the stress of the vehicle body in the front-back direction, the left-right direction, the up-down direction and the like, and one set of multi-component dynamic force sensors with the specification of SFC6-D10t is optimized, and the angle sensor specifically comprises two SFC6-D10t six-component dynamic force sensors (each comprising 2 signal conditioning modules), one set of calibration tools and two data wires (with the specification of 10 meters).

Further, a GPS positioning device is arranged in the junction box, the input end of the GPS positioning device is connected with a GPS antenna, and the output end of the GPS positioning device is connected with the client.

Further, the voltage acquisition channel employs a voltage and quadrature encoder to acquire PXIe-6363, PXIe-6363 provides PXIe, 32-way AI (16 bits, 2 MS/s), 4-way AO, 48-way DIO, and four 32-bit counters/timers for PWM, encoder, frequency, event counting, etc. applications. The device provides high performance functionality using a high throughput PCI Express bus and multi-core optimized drivers and applications. PXIe-6363 is suitable for a wide range of applications ranging from basic data logging to control and test automation. The accompanying NI-DAQmx driver and configuration utility simplify configuration and measurement.

Further, the transfer of 422/485 signals is realized through a PXI-8433 serial communication card, and PXI-8433/4 is a high-performance industrial interface for high-speed port-port isolation communication with RS485 and RS422 equipment. It has high performance DMA transfers, multithreading, and multiprocessor support. The user may select a 4-wire or 2-wire transceiver mode to enable full-duplex or half-duplex communications. The NI serial interface may also be used as a standard COM port for compatibility with programs using serial communication.

Further, the strain signal acquisition adopts a synchronous input module with specification PXIe-4330. PXIe-4330 has higher accuracy, high data throughput and synchronization characteristics, making it an ideal choice for high density measurement systems. To eliminate noise, each channel of PXIe-4330 provides an anti-aliasing and digital filter. Each channel also has an independently programmable firing voltage. In addition, PXIe-4330 provides telemetry, internal resistance bridging, and shunt calibration options for each channel.

Further, the test cabinet is a vibration reduction cabinet and is fixedly arranged on the tested vehicle.

Further, the communication device adopts a 4G router.

Further, the analysis instrument employs a PXI instrument that combines the electrical bus characteristics of PCI with the modular and Eurocard mechanical packaging characteristics of CompactPCI and adds a specialized synchronization bus.

Furthermore, the analysis instrument is built by a platform of a PXI bus, a host computer of the analysis instrument is PXIe-8861, and a case of the analysis instrument is PXIe-1095. Intel Xeon quad-core embedded controllers of PXI Express systems may be used for processor-intensive RF, modular instrumentation, and data acquisition applications. PXIe-8861 contains two 10/100/1000BASE-TX (gigabit) Ethernet ports, two USB 3.0 ports, four USB 2.0 ports, and integrated hard disk drives, serial ports, two Thunderbolt ^TM 3 ports, and other peripheral I/O. The PXIe-1095 chassis has 18 slots, 5 hybrid slots, 11 PXI Express slots, and 1 PXI Express system timing slot,up to 24GB/s, each slot of PXIe-1095 is equipped with a high bandwidth backplane and up to 82W power and cooling capabilities to meet various high performance test and measurement application requirements. The chassis contains two hot pluggable power supplies that can increase the Mean Time To Repair (MTTR) of the PXI system. Each slot of the module may be plugged into a PXI Express module, and up to 5 slots may support modules that are compatible with a standard PXI hybrid bus.

Further, the software of the acquisition unit is developed based on NI flexlog, and supports the functions of setting before acquisition, control and display in acquisition, and review and export after acquisition. The software of the acquisition unit is customizable, so that a user can quickly construct a flexible and extensible data recording system by using data acquisition hardware, and the synchronous data from an analog sensor, a digital signal, a vehicle-mounted communication bus and the like can be quickly set, displayed and recorded by using a configuration workflow for a specific sensor without any programming; a voltage, current, or digital signal may also be generated to drive an actuator or control a setting. The software can automatically save metadata of the recorded test configuration so as to quickly track test results and compare the results of a plurality of tests, and can also interactively check the test results through an integrated data viewer so as to intuitively check the data and draw conclusions.

Further, PXI-6683H timing and synchronization modules are also provided in the analysis instrument, the functions include TCXO, GPS, IRIG-B, IEEE 1588, and the use of GPS, IEEE 1588, and IRIGB to synchronize the PXI and PXI Express systems to perform synchronization events. PXI-6683 can specify that events and clock signals be generated at some synchronized point in time in the future, and time-stamp input events based on synchronized system time. PXI-6683 has an on-board temperature compensated crystal oscillator (TCXO) that can achieve long-term stability through GPS, IEEE 1588, and IRIGB discipline. PXI-6683 can also be used to synchronize multiple devices within a PXI system by routing clock signals and triggers with low skew inside the PXI chassis or between multiple chassis.

And the client is used for remotely controlling the operation of the analysis instrument and receiving the analysis result sent by the analysis instrument.

Further, the client includes a tablet computer, a desktop computer, a smart phone, and the like.

Referring to fig. 3, a use flow of the data acquisition system for a test vehicle of the present application is shown, including the following steps:

step one, after a vehicle is electrified or awakened for the first time, the test cabinet performs data acquisition, the uploading equipment acquires vehicle condition signals of the test vehicle, and signals corresponding to the data acquisition channels are acquired in real time.

Step two, in the normal state of the signal, the test cabinet and the communication equipment upload the collected vehicle condition signal of the test vehicle to the client through the Internet; and under the condition of poor signal or broken network, the test cabinet stores the vehicle condition signal of the test vehicle, and after the network is recovered, the vehicle condition signal of the test vehicle is continuously uploaded to the client through the Internet.

And thirdly, the client receives, stores and analyzes the vehicle condition signals and builds a test vehicle monitoring system.

And fourthly, the test vehicle monitoring system reads and analyzes vehicle condition data from the communication equipment.

And fifthly, the test vehicle supervision system gives out a supervision result of the test vehicle, and if the supervision result shows abnormality, a mail prompt of vehicle early warning is sent to a vehicle user.

In summary, the present application has the following beneficial effects:

The foregoing is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the embodiments and scope of the present utility model, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included in the scope of the present utility model.

Claims

1. A data acquisition system for a test vehicle, comprising:

the testing cabinet is internally provided with an analysis instrument, a junction box which is in linear connection with the analysis instrument and communication equipment,

the analysis instrument is internally provided with an acquisition unit and a bus unit, the bus unit is electrically connected with the client through the communication equipment, and the analysis instrument is used for acquiring data of a tested object, analyzing and calculating the data and then conveying analysis results;

the junction box integrates a sensor function so as to detect data of a tested vehicle;

2. A data acquisition system for a test vehicle according to claim 1, wherein the junction box integrates the functions of angle, pressure, strain, displacement and temperature sensors.

3. A data acquisition system for a test vehicle according to claim 2, wherein the junction box employs a magnetic grid sensor as a displacement sensor and a hexad force sensor as an angle sensor.

4. The data acquisition system for a test vehicle according to claim 2, wherein a GPS positioning device is further provided in the junction box, an input end of the GPS positioning device is connected to the GPS antenna, and an output end of the GPS positioning device is connected to the client.

5. The data acquisition system for a test vehicle of claim 1, wherein the test cabinet is a vibration-damping cabinet and is fixedly mounted on the test vehicle under test.

6. The data acquisition system for a test vehicle of claim 1, wherein the communication device employs a 4G router.

7. The data acquisition system for a test vehicle of claim 1, wherein the client comprises a tablet computer or a smart phone.

8. The data collection system for a test vehicle of claim 1, wherein the analysis instrument employs a PXI instrument that combines the electrical bus characteristics of PCI with the modular and eurocoard mechanical packaging characteristics of CompactPCI and adds a dedicated synchronization bus.

9. The data acquisition system for a test vehicle of claim 8, wherein the analysis instrument is implemented using a platform of a PXI bus, the host computer is PXIe-8861, and the chassis is PXIe-1095.

10. The data acquisition system for a test vehicle of claim 1, wherein the software of the acquisition unit supports pre-acquisition setup, control and display in acquisition, review after acquisition and export functions based on NI flexlog development.