CN203337393U - Vehicle-borne vehicle test data acquisition system - Google Patents

Abstract

The utility model discloses a vehicle-mounted vehicle test data acquisition system, the first analog signal acquisition module and the temperature acquisition module are connected to the corresponding sensors in the test environment information measurement unit, the temperature acquisition module and the second analog signal acquisition module are connected to the vehicle information measurement The corresponding sensors in the unit collect vehicle information and test environment information to realize the measurement of analog signals and temperature signals; the GPS information measurement unit collects latitude and longitude, vehicle, vehicle acceleration and altitude information; the above-mentioned collected data are converted into CAN data Packet, transmitted to the host computer through the CAN bus and USBtoCAN communication module; the first analog signal acquisition module, the second analog signal acquisition module, the temperature acquisition module and the GPS information measurement unit provide 12V working voltage from the cigarette lighter power connector. The system realizes the comprehensive collection of test information, shortens the test time and reduces the test cost.

Description

A vehicle-mounted vehicle experiment data acquisition system

technical field

The utility model relates to the field of automobile test equipment, in particular to a vehicle-mounted automobile experiment data acquisition system.

Background technique

The road test of the whole vehicle and the test on the chassis dynamometer of the laboratory are the basic test methods for the calibration test and inspection of the car by the car manufacturer and the car testing agency. Through these tests, various performances of the car can be improved and the quality of the car can be guaranteed. In these tests, the test environment information and vehicle status information are important factors that affect the test results. Accurate measurement of these information can better grasp the test time and process the test results.

In the process of realizing the utility model, the utility model finds that at least the following shortcomings and deficiencies exist in the prior art:

1) In the actual road test, there is currently no collection system that can measure various information including environment and vehicle information, and the purpose of each road test may be different, such as: air conditioning test, cold start test, power performance The information that needs to be measured is also different for the test and the fuel consumption test. Therefore, each test needs to carry a variety of different instruments to measure different information.

2) When the chassis dynamometer test is performed in the laboratory, the instruments in the laboratory can only measure part of the information due to functional limitations, and some information that needs to be measured needs to be measured with other instruments. Using multiple instruments in one experiment will cause troublesome instrument operation, long test preparation time, troublesome test data integration and processing, and test cost.

Utility model content

The utility model provides a vehicle-mounted vehicle experiment data collection system. The utility model realizes the comprehensive collection of test information, shortens the test time, and reduces the test cost. See the following description for details:

A vehicle-mounted vehicle test data acquisition system, comprising: a USBtoCAN communication module, the USBtoCAN communication module is connected to a host computer through a USB interface, and is connected to a first analog signal acquisition module, a second analog signal acquisition module, and a temperature acquisition module through a CAN bus Connect with the GPS information measuring unit;

The first analog signal acquisition module and the temperature acquisition module are connected to the corresponding sensors in the test environment information measurement unit, and the temperature acquisition module and the second analog signal acquisition module are connected to the corresponding sensors in the vehicle information measurement unit to collect Vehicle information and test environment information realize the measurement of analog signals and temperature signals; the GPS information measurement unit collects latitude and longitude, vehicle, vehicle acceleration and altitude information;

The data collected above are all converted into CAN data packets, and transmitted to the host computer through the CAN bus and the USBtoCAN communication module; wherein, the first analog signal acquisition module, the second analog signal acquisition module, The temperature acquisition module and the GPS information measurement unit are provided with 12V working voltage by the cigarette lighter power connector.

The vehicle-mounted multi-purpose vehicle test data acquisition system also includes: a system data monitoring and display instrument,

The CAN data packet is transmitted to the system data monitoring and display instrument through the USBtoCAN communication module and the CAN bus.

The test environment information measurement unit includes: a wind direction sensor, a wind speed sensor, an atmospheric pressure sensor, an ambient humidity sensor and a light intensity sensor connected to the first analog signal acquisition module; an ambient temperature sensor connected to the temperature acquisition module.

The atmospheric pressure sensor, the ambient temperature sensor and the ambient humidity sensor are all arranged in the shutter box.

The vehicle information measuring unit includes: an oxygen sensor connected to the second analog signal acquisition module, an accelerator position sensor, an engine speed sensor, an intake air pressure sensor and a throttle position sensor; a coolant temperature sensor connected to the temperature acquisition module , an engine oil temperature sensor and an exhaust gas temperature sensor; wherein, the engine speed sensor is clipped on any cylinder spark plug wire of the engine.

The engine speed sensor is a pulse induction sensor; the exhaust gas temperature sensor is a K-type thermocouple; the accelerator position sensor is a pull-wire displacement sensor. The stay wire displacement sensor is installed on a sensor bracket in the driver's cab, and the sensor bracket is fixed on the instrument panel and the floor of the driver's cab.

The GPS information measuring unit includes: a GPS antenna and a GPS data processing module, the GPS antenna measures vehicle speed, mileage, vehicle acceleration, latitude and longitude and altitude information, and transmits to the GPS data processing module, the GPS data processing module The module receives information and converts it into a corresponding CAN data packet, which is transmitted to the host computer through the CAN bus and the USBtoCAN communication module.

The first analog signal acquisition module, the analog signal acquisition module, the temperature acquisition module and the GPS data processing module are all arranged in the aluminum shockproof foam box on the car.

The beneficial effect of the technical solution provided by the utility model is: the utility model of the system collects comprehensive vehicle information through the temperature acquisition module, the first and second analog signal acquisition modules and the GPS data processing module, and can satisfy different tests and different users Different test requirements to achieve multi-purpose design goals. The system can accurately measure the test environment information such as atmospheric pressure, ambient temperature and humidity, wind speed, wind direction and light intensity; it can accurately measure engine speed, coolant temperature, oxygen sensor voltage, engine exhaust temperature, accelerator pedal position and engine oil temperature, etc. Vehicle running status information; it can accurately measure GPS information such as latitude, longitude and altitude when the vehicle is tested. Through the measurement of the above-mentioned comprehensive information of the vehicle test, the test personnel can better grasp the test conditions and test time, make the test results more accurate, real-time accurate measurement and storage of various test information, and also facilitate the subsequent data processing and correction of the test personnel; , by using this system, the previous test instrument system can be fully simplified, and it is not necessary to carry and operate various test instruments such as weather instrument, navigator and vehicle data recorder at the same time during the test, which simplifies the test process, saves test time, and reduces test cost.

Description of drawings

Figure 1 is a block diagram of the vehicle-mounted vehicle experiment data acquisition system;

Figure 2 is a schematic diagram of the specific structure of the vehicle-mounted vehicle experiment data acquisition system.

The list of parts listed in the attached drawings is as follows:

1: Host computer; 2: USBtoCAN communication module;

3: Aluminum shockproof foam box; 4: The first analog signal acquisition module;

5: The second analog signal acquisition module; 6: Temperature acquisition module;

7: GPS data processing module; 8: Automobile exhaust post-processor;

9: Exhaust temperature sensor; 10: Oxygen sensor;

11: Sensor bracket; 12: Throttle position sensor;

13: Accelerator pedal; 14: Cigarette lighter power connector;

15: Engine; 16: Engine speed sensor;

17: intake air pressure sensor; 18: throttle position sensor;

19: Coolant temperature sensor; 20: Oil temperature sensor;

21: System data monitoring display; 22: GPS antenna;

23: Wind direction sensor; 24: Wind speed sensor;

25: Atmospheric pressure sensor; 26: Environmental humidity sensor;

27: Ambient temperature sensor; 28: Light intensity sensor.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

Based on various reasons described in the background art, it is necessary to actually develop a vehicle-mounted multi-purpose vehicle test data acquisition system. The system can be expanded in function. Before the test, you only need to select the sensor required for the test and set some parameters in the software to complete a variety of road and laboratory chassis dynamometer tests. The test data in each test is collected, displayed and stored in a unified manner, which simplifies the instrument operation and data processing process.

Referring to Fig. 1 and Fig. 2, a kind of vehicle-mounted automobile test data acquisition system comprises: USBtoCAN communication module 2, USBtoCAN communication module 2 is connected with host computer 1 through USB interface, and the first analog signal acquisition module 4, the second through CAN bus Analog signal acquisition module 5, temperature acquisition module 6 are connected with GPS information measurement unit C;

The first analog signal acquisition module 4 and the temperature acquisition module 6 are connected to the corresponding sensors in the test environment information measurement unit A, and the temperature acquisition module 6 and the second analog signal acquisition module 5 are connected to the corresponding sensors in the vehicle information measurement unit B to collect vehicle information and test environment information to realize the measurement of analog signals and temperature signals;

The GPS information measuring unit C collects latitude and longitude, vehicle, vehicle acceleration and altitude information;

The data collected above are all converted into CAN data packets, and transmitted to the host computer 1 through the CAN bus and the USBtoCAN communication module 2 . Among them, the first analog signal acquisition module 4 , the second analog signal acquisition module 5 , the temperature acquisition module 6 and the GPS information measurement unit C are provided with 12V working voltage by the cigarette lighter power connector 14 .

During specific implementation, the first analog signal acquisition module 4, the second analog signal acquisition module 5, the temperature acquisition module 6 and the GPS data processing module 7 all include two CAN data ports, one is a CAN data receiving port, and the other is a CAN data transmission Port, so that multiple modules can be connected in series using the CAN bus, and connected to a CAN interface of the USBtoCAN communication module 2 to form a CAN data channel to realize the connection with the first analog signal acquisition module 4, the second analog signal acquisition module 5, and temperature acquisition. Data exchange between the module 6 and the GPS information measuring unit C; the other CAN interface of the USBtoCAN communication module 2 is connected to the USB port of the host computer 1 to realize data exchange with the host computer 1 . The first analog signal acquisition module 4 , the second analog signal acquisition module 5 and the temperature acquisition module 6 are all eight-channel acquisition modules.

The data acquisition software is installed in the host computer 1, the data acquisition software calls the driver program of the USBtoCAN communication module 2, reads various measurement data (that is, CAN data packets) transmitted by the USBtoCAN communication module 2, and displays them digitally on the computer screen Or graphical display, at the same time, the measurement data is stored in the computer hard disk in real time.

Further, in order to allow the driver to understand the test parameters, the test parameters can also be transmitted to the system data monitoring display 21 through the USBtoCAN communication module 2 and the CAN bus, so that the driver can grasp the test parameters in real time.

In actual implementation, the test environment information measurement unit A is mainly used to measure the environmental parameters of the test vehicle, so that the test personnel can more accurately determine the test timing and conduct the test according to the preset test conditions. This measurement unit comprises: connect the wind direction sensor 23 of the first analog signal acquisition module 4, wind speed sensor 24, atmospheric pressure sensor 25, ambient humidity sensor 26 and light intensity sensor 28 (these five sensors all output analog signal); Ambient temperature sensor 27 of module 6 .

Further, in order to make the measured signal more accurate, the atmospheric pressure sensor 25, the ambient humidity sensor 26 and the ambient temperature sensor 27 are all arranged in the shutter box.

During specific implementation, the vehicle information measurement unit B mainly uses a plurality of sensors to measure the running status information of the vehicle, so as to understand the vehicle status in real time, including: an oxygen sensor 10 connected to the second analog signal acquisition module 5, an accelerator position sensor 12 , engine speed sensor 16, intake pressure sensor 17 and throttle position sensor 18; exhaust temperature sensor 9, coolant temperature sensor 19 and engine oil temperature sensor 20 connected to temperature acquisition module 6. The engine speed sensor 16 is clamped on any cylinder spark plug wire of the engine, and the engine 15 will produce a high-voltage pulse every revolution, and the rotating speed of the engine 15 can be measured by measuring the number of pulses per unit time.

Wherein, the oxygen sensor 10, the intake pressure sensor 17, the throttle position sensor 18, the coolant temperature sensor 19 and the engine oil temperature sensor 20 are sensors carried by the vehicle, and the engine speed sensor 16 is a pulse induction sensor. The exhaust temperature sensor 9 is a K-type thermocouple, preferably installed on the exhaust pipe 1 cm ahead of the automobile exhaust after-processor 8; the throttle position sensor 12 is a pull-wire displacement sensor installed on the sensor bracket 11 in the driver's cab , the sensor bracket 11 is fixed on the instrument panel and the cab floor, and the stay wire of the accelerator position sensor 12 is connected to the accelerator pedal 13 through a hook.

During specific implementation, the GPS information measurement unit C is mainly used to measure GPS-related information, including GPS information such as vehicle speed, mileage, vehicle acceleration, latitude and longitude, and altitude. This unit is composed of a GPS antenna 22 and a GPS data processing module 7. GPS The data processing module 7 is connected to the CAN bus of the system, receives GPS information through the GPS antenna 22, and converts the corresponding GPS information into CAN data packets, and then transmits the CAN data packets to the host computer through the CAN bus and the USBtoCAN communication module 2 1.

Further, in order to be able to play the role of shockproof and anti-interference, the first analog signal acquisition module 4, the second analog signal acquisition module 5, the temperature acquisition module 6 and the GPS data processing module 7 are all arranged in the aluminum shockproof foam box on the car within 3.

Since this example uses various types of sensors and data acquisition modules to meet the sampling rate requirements of different signals, the sampling frequencies of these sensors and data acquisition modules are different. The GPS signal and temperature signal in the system change slowly and do not need too fast acquisition rate. The sampling frequency is set to 10Hz in the system, while the analog signal itself changes quickly in the system and requires a high sampling frequency. The sampling frequency can be set up to 100Hz, and it can be adjusted in the range of 10Hz to 100Hz according to the actual test. For the test data collected at different sampling frequencies, the host computer 1 will use the data with high sampling frequency as a benchmark, and integrate all the data according to the sampling time. For example: for a sampling time point, there is only data of a high sampling rate signal and no corresponding data of a low sampling rate signal, so the data of the low sampling rate signal at this sampling time point is equal to the data of the low sampling rate signal at the previous sampling time point Data, so that the final data volume of signals with different sampling rates is the same, which is convenient for storage.

Before using the vehicle-mounted vehicle experiment data acquisition system of the utility model, start the vehicle to supply power for the system, and turn on the host computer 1 to automatically search for each sub-module. After the search is completed, the system will automatically enter the measurement and data monitoring state. If the sampling frequency of the signal needs to be reset, the software in the host computer 1 needs to be used to set the sampling frequency of the corresponding signal. At the same time, the host computer 1 can also be used to graphically display, monitor and save the data.

Table 1 Model list of sensors and data acquisition modules

serial number sensor Function Range 1 GPS data processing module 7 Collect and process GPS signals 2 Temperature acquisition module 6 Acquisition of temperature sensor data 8 channels

3 Analog signal acquisition modules 4 and 5 Collect analog sensor data 8 channels 4 Exhaust gas temperature sensor 9 Measuring engine exhaust temperature 0～1100℃ 6 Oxygen sensor 10 Measuring Excess Air Factor 0～3 7 Cigarette Lighter Power Tap 14 provide power 12V 8 Engine speed sensor 16 Speed measurement by induction pulse 0～10000rpm 9 Throttle position sensor 18 Measuring Throttle Opening 0～100% 10 Intake pressure sensor 17 Measuring intake pressure 0～2bar 11 Coolant temperature sensor 19 Measuring engine coolant temperature -40～100℃ 12 Oil temperature sensor 20 Measuring oil temperature -40～120℃ 13 System data monitoring display instrument 21 Data display and monitoring 14 GPS antenna 22 Measure speed, distance, altitude, etc. 15 Wind direction sensor 23 measure wind direction 0～360° 16 Wind speed sensor 24 Measuring wind speed 0～45m/s 17 Atmospheric pressure sensor 25 measure barometric pressure 10～1100hpa 18 Ambient temperature sensor 26 Measure ambient temperature -50～100℃ 19 Ambient Humidity Sensor 27 Measure ambient humidity 0～100%RH 20 Light intensity sensor 28 Measure light intensity 0～2000W/ ^m2 twenty one data acquisition software Set parameters, collect and save data twenty two Throttle position sensor 12 Measure the throttle position 0～100% twenty three USBtoCAN communication module 2 data communication

During specific implementation, the embodiments of the present utility model do not limit the models of the above-mentioned devices, as long as any device can complete the above-mentioned functions.

To sum up, through this system, the comprehensive collection of test information is realized, the test time is shortened, the test cost is reduced, and the actual needs of variable parameters are met.

Those skilled in the art can understand that the accompanying drawing is only a schematic diagram of a preferred embodiment, and the serial numbers of the above-mentioned embodiments of the utility model are only for description, and do not represent the advantages and disadvantages of the embodiments.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (9)

1. a vehicular automobile test data acquisition system, comprise: the USBtoCAN communication module, it is characterized in that, described USBtoCAN communication module is connected with host computer by USB interface, by the CAN bus, with the first collection of simulant signal module, the second collection of simulant signal module, temperature collect module and GPS information measurement unit, is connected;

Respective sensor in described the first collection of simulant signal module and described temperature collect module joint test environmental information measuring unit, described temperature collect module is connected the respective sensor in the information of vehicles measuring unit, the measurement of collection vehicle information and experimental enviroment information realization simulating signal and temperature signal with described the second collection of simulant signal module; Described GPS information measurement unit pair warp and weft degree, vehicle, vehicle acceleration and sea level elevation information;

The above-mentioned data that collect all are converted to the CAN packet, by described CAN bus and described USBtoCAN communication module, transfer to described host computer; Wherein, described the first collection of simulant signal module, described the second collection of simulant signal module, described temperature collect module and described GPS information measurement unit provide the 12V operating voltage by the cigar lighter power connection.

2. a kind of vehicular automobile test data acquisition system according to claim 1, is characterized in that, described vehicular automobile test data acquisition system also comprises: the system data control displayer,

Described CAN packet by described USBtoCAN communication module and described CAN bus transfer to described system data control displayer.

3. a kind of vehicular automobile test data acquisition system according to claim 1, it is characterized in that, described experimental enviroment information measurement unit comprises: the wind transducer, air velocity transducer, barometric pressure sensor, ambient humidity sensor and the intensity of illumination sensor that connect described the first collection of simulant signal module; The environment temperature sensor that connects described temperature collect module.

4. a kind of vehicular automobile test data acquisition system according to claim 3, is characterized in that, described barometric pressure sensor, described environment temperature sensor and described ambient humidity sensor all are arranged in thermometer screen.

5. a kind of vehicular automobile test data acquisition system according to claim 1, it is characterized in that, described information of vehicles measuring unit comprises: the lambda sensor, throttle position switch, engine speed sensor, air inlet pressure sensor and the throttle position sensor that connect described the second collection of simulant signal module; The cooling-water temperature transmitter, oil temperature sensor and the exhaust gas temperature sensor that connect described temperature collect module; Wherein, described engine speed sensor is clipped on arbitrary cylinder spark-plug cable of engine.

6. a kind of vehicular automobile test data acquisition system according to claim 5, is characterized in that, described engine speed sensor adopts pulse induction formula sensor; Described exhaust gas temperature sensor is K type thermopair; Described throttle position switch is stay-supported type displacement sensor.

7. a kind of vehicular automobile test data acquisition system according to claim 6, is characterized in that, described stay-supported type displacement sensor is arranged on the sensor stand in pilothouse, and described sensor stand is fixed on instrument panel and cab floor.

8. a kind of vehicular automobile test data acquisition system according to claim 1, is characterized in that, described GPS information measurement unit comprises: gps antenna and gps data processing module,

Described gps antenna is measured the speed of a motor vehicle, distance travelled, vehicle acceleration, longitude and latitude and sea level elevation information, and transfers to described gps data processing module; Described gps data processing module receives information, and is converted into corresponding CAN packet, by described CAN bus and described USBtoCAN communication module, transfers to described host computer.

9. a kind of vehicular automobile test data acquisition system of stating according to Claim 8, it is characterized in that, described the first collection of simulant signal module, described the second collection of simulant signal module, described temperature collect module and described gps data processing module all are arranged in the shockproof bubble chamber of aluminum on automobile.

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