Automobile cooling liquid temperature and brake air pressure acquisition device based on LabVIEW

Abstract

The utility model discloses an automobile cooling liquid temperature and brake air pressure acquisition device based on LabVIEW. The automobile cooling liquid temperature and brake air pressure acquisition device comprises an upper computer; the temperature sensor is arranged in cooling liquid of the vehicle, and the temperature sensor is in wireless connection with the upper computer; the pressure sensors are arranged on brake air pressure pipelines of four wheels of the vehicle in a one-to-one correspondence mode, and the pressure sensors are in wireless connection with the upper computer; the register is connected with the upper computer, is in wireless connection with the temperature sensor and the plurality of pressure sensors, and is used for storing data; the input end of the divider is connected with the register; the input end of the limiting device is connected with the output end of the divider; the display screen is connected with the output end of the limiting device; the memory is connected with the output end of the limiting device; the timer is connected with the upper computer and is used for providing a clock signal; and the reset circuit is connected with the upper computer and is used for restarting the program. The utility model has the characteristic that the remote monitoring can be carried out.

Description

TECHNICAL FIELD

[0001] The utility model relates to wireless transmission technical field more particularly, the utility model relates to a kind of automobile cooling liquid temperature and brake air pressure acquisition device based on LabVIEW. BACKGROUND

[0002] In the traditional automobile data acquisition mode, especially for the key data such as cooling liquid temperature and brake pressure, technicians often need to be near the car, read data through wired connected equipment or directly in the instrument system in the car.

[0003] In the traditional automobile data acquisition mode, especially for the key data such as cooling liquid temperature and brake pressure, technicians often need to be near the car, read data through wired connected equipment or directly in the instrument system in the car.

[0004] The problems caused by wired connection include:

[0005] Installation and maintenance are complex: wired connection needs wiring, which not only increases the complexity of installation, but also may cause inconvenience during vehicle maintenance.

[0006] The environment is harsh: when collecting automobile information, the car is usually outdoors, and the working environment of the collection personnel is too harsh due to high temperature in summer or low temperature in winter.

[0007] The cost is relatively high: due to the need of additional wires and connectors, the material and installation cost of wired system is relatively high.

[0008] Safety hazard: wires and connectors may cause failure due to wear, aging or improper operation, and even may cause safety problems. SUMMARY

[0009] The utility model designs and develops an automobile cooling liquid temperature and brake air pressure acquisition device based on LabVIEW, which realizes remote data acquisition through wireless transmission and overcomes signal transmission obstacles caused by distance.

[0010] The technical scheme provided by the utility model is:

[0011] An automobile cooling liquid temperature and brake air pressure acquisition device based on LabVIEW, comprising:

[0012] A host computer; and

[0013] At least one temperature sensor is arranged in the cooling liquid of the vehicle, and the at least one temperature sensor is wirelessly connected with the host computer.

[0014] A plurality of pressure sensors are respectively arranged on the brake air pressure lines of the four wheels of the vehicle, and the plurality of pressure sensors are wirelessly connected to the host computer;

[0015] A register is connected to the host computer, and the register is wirelessly connected to the at least one temperature sensor and the plurality of pressure sensors, and is used for storing data;

[0016] A divider is connected to the input end of the register;

[0017] A limiter is connected to the output end of the divider;

[0018] A display screen is connected to the output end of the limiter;

[0019] A memory is connected to the output end of the limiter;

[0020] A timer is connected to the host computer, and is used for providing a clock signal;

[0021] A reset circuit is connected to the host computer, and is used for restarting the program.

[0022] Preferably, it further comprises:

[0023] A data acquisition card comprises a 485 interface and an IN interface;

[0024] The at least one temperature sensor is connected to the IN interface.

[0025] Preferably, it further comprises:

[0026] A first wireless acquisition device is connected to the 485 interface of the data acquisition card and the plurality of pressure sensors, and is used for sending temperature data and pressure data;

[0027] A second wireless acquisition device is connected to the host computer, and the second wireless acquisition device wirelessly communicates with the first wireless acquisition device, and is used for receiving the temperature data and the pressure data.

[0028] Preferably, the host computer and the second wireless acquisition device are connected through a main serial port.

[0029] Preferably, the register is connected to the main serial port and the second wireless acquisition device.

[0030] Preferably, it further comprises:

[0031] A sub-data processor is arranged between the register and the divider.

[0032] Preferably, the divisor of the divider is 10.

[0033] Preferably, the at least one temperature sensor is a WRNK-191 thermocouple.

[0034] Preferably, the first wireless acquisition device and the second wireless acquisition device are both RS485 double signal enhanced Lora modules.

[0035] The automobile cooling liquid temperature and brake air pressure acquisition device has the beneficial effects that:

[0036] The automobile cooling liquid temperature and brake air pressure acquisition device based on LabVIEW provided by the utility model can realize real-time monitoring of key data through wireless technology, overcome signal transmission obstacles caused by distance, realize remote data acquisition, enable staff to acquire data of the automobile in the test field in the office, simplify the installation process, reduce maintenance difficulty, improve the reliability and flexibility of the system, and is more convenient, efficient and safe. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a schematic view of the automobile cooling liquid temperature and brake air pressure acquisition device based on LabVIEW.

[0038] Figure 2 It is a connection schematic view of the temperature sensor and the data acquisition card.

[0039] Figure 3 It is a connection schematic view of the data acquisition card and the first wireless acquisition device.

[0040] Figure 4 It is a circuit connection schematic view of the temperature sensor and the host computer. DETAILED DESCRIPTION

[0041] The utility model makes further detailed description in combination with the drawings, so that the person skilled in the art can implement according to the description.

[0042] As Figure 1 The utility model provides a kind of automobile cooling liquid temperature and brake air pressure acquisition device based on LabVIEW, comprising:

[0043] At least one temperature sensor 110, multiple pressure sensors 120, data acquisition card 130, first wireless acquisition device 140, second wireless acquisition device 150 and host computer 160;

[0044] Wherein, the at least one temperature sensor 110 is placed in the cooling liquid of vehicle, as Figure 2As shown, at least one temperature sensor 110 is connected to the IN0- and IN0+ interfaces of the data acquisition card 130 simultaneously, the first wireless acquisition device 140 is responsible for sending signals, the plurality of pressure sensors 120 and the data acquisition card 130 are connected to the first wireless acquisition device 140 through the 485 communication line simultaneously, and the like Figure 3 As shown, the first wireless acquisition device 140 is connected to the 485 interface of the data acquisition card 130, and the first wireless acquisition device 140, the data acquisition card 130, the plurality of pressure sensors 120 and the at least one temperature sensor 110 are connected to the direct current power supply in the vehicle, the second wireless acquisition device 150 is responsible for collecting signals, the second wireless acquisition device 150 is connected to the upper computer 160 through the 485 to USB line, and the first wireless acquisition device 140 and the second wireless acquisition device 150 transmit data through wireless transmission.

[0045] In the embodiment, the number of temperature sensors 110 is 4, and the 4 temperature sensors are connected to other IN interfaces of the data acquisition card 130, in another embodiment, the number of temperature sensors 110 can be 2 or 3.

[0046] In the embodiment, the temperature sensor 110 adopts a thermocouple WRNK-191, which has low power consumption, can realize long-time operation, consumes a large amount of power, and is sensitive to temperature changes, has fast data updating, and can accurately transmit temperature information.

[0047] In the embodiment, the number of pressure sensors 120 is 4, and the 4 pressure sensors 120 are respectively and one-to-one corresponding to the brake air pressure pipelines of the four wheels of the vehicle, and detect the brake air pressures of the four wheels.

[0048] In the embodiment, the pressure sensor 120 adopts a 2088 type explosion-proof pressure transmitter, which can adapt to harsh environments and has explosion-proof function and good durability.

[0049] In the embodiment, the data acquisition card 130 adopts M2102, 4-channel thermocouple input, which is an electronic device for measuring, collecting, processing and controlling electrical signals, and its working principle is to connect the signal source to the input or output channel, and convert the analog signal into a digital signal through the analog input circuit of the data acquisition card 130, the digital signal is converted into digital data by the AD converter, processed by the data processor, and finally output as an analog signal by the DA converter.

[0050] In the embodiment, the first wireless acquisition device 140 and the second wireless acquisition device 150 both adopt RS485 double signal enhanced Lora modules, which can realize 3km long-distance communication.

[0051] As Figure 4 shown, the host computer 160 is provided with a main serial port 161 for connecting with the second wireless acquisition device 150, that is, connecting with at least one temperature sensor 110 and a plurality of pressure sensors 120, specifically including a serial port type interface, a unit ID interface, a VISA resource name interface, a baud rate interface and a parity interface; a register 171 is connected with the main serial port 161 and the second wireless acquisition device 150, for data reading of the temperature sensor 110 and the pressure sensor 120, wherein 100 is the address number of the sensor, the temperature sensor 110 and the pressure sensor 120 can be respectively address numbered according to needs, and the address number is changed to 101, 102, 103, etc. accordingly, that is, the temperature channel or pressure channel to be selected and displayed; connected with the register 171 is a sub-data processor for integrating the read temperature value and pressure value, if there is only one temperature sensor 110 or pressure sensor 120, there is only one value, if there are two temperature sensors or pressure sensors, there is an array, the input end of the sub-data processor is connected with a divider 172 for proportionally reducing the data collected by the sensor, in the embodiment, the reduction ratio is 10, because the data obtained by the sensor is 10 times the true value, therefore, the true value is displayed after being reduced by 10 times; the input end of a limit value device 173 is connected with the output end of the divider 172 for limiting the data to -60-200, for excluding abnormal values; the output end of the limit value device 173 is connected with a display screen after integration, for overall display of the temperature data and pressure data, in the embodiment, the displayed is a data curve diagram obtained by different sensors; at the same time, the sub-data processor also displays errors, if there is an error, an error code 56 is output; a memory 174 is connected with the output of the limit value device 173 for data storage, in the embodiment, the stored data is in table form, which can be viewed or exported; the host computer 160 is also connected with a timer 175 and a reset circuit 176 for respectively providing a clock signal, in the embodiment, the timer 175 executes the program again after waiting for 1000ms, that is, executing once per second, the reset circuit 176 is used for restarting the program and clearing the previously collected image data.

[0052] The automobile cooling liquid temperature and brake air pressure acquisition device based on LabVIEW can realize real-time monitoring of key data through wireless technology, overcome signal transmission obstacles caused by distance, realize remote data acquisition, enable staff to obtain data of automobiles in a test field in an office, simplify an installation process, reduce maintenance difficulty, improve reliability and flexibility of a system, and are more convenient, efficient and safe.

[0053] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.

Claims

1. A LabVIEW-based automobile coolant temperature and brake air pressure acquisition device, characterized in that, The application relates to a temperature and pressure data acquisition system for a vehicle. The application comprises: a host computer; at least one temperature sensor arranged in the cooling liquid of the vehicle, and the at least one temperature sensor is wirelessly connected to the host computer; a plurality of pressure sensors arranged on the brake air pressure pipelines of four wheels of the vehicle respectively one by one, and the plurality of pressure sensors are wirelessly connected to the host computer; a register connected to the host computer, and the register is wirelessly connected to the at least one temperature sensor and the plurality of pressure sensors for storing data; a divider with an input end connected to the register; a limit value device with an input end connected to the output end of the divider; a display screen connected to the output end of the limit value device; a memory connected to the output end of the limit value device; a timer connected to the host computer for providing a clock signal; a reset circuit connected to the host computer for restarting a program.

2. The LabVIEW-based automobile coolant temperature and brake air pressure acquisition device of claim 1, wherein, The application further comprises: a data acquisition card comprising a 485 interface and an IN interface; the at least one temperature sensor is connected to the IN interface.

3. The LabVIEW-based automobile coolant temperature and brake air pressure acquisition device of claim 2, wherein, The application further comprises: a first wireless acquisition device connected to the 485 interface of the data acquisition card and the plurality of pressure sensors for sending temperature data and pressure data; a second wireless acquisition device connected to the host computer, and the second wireless acquisition device wirelessly communicates with the first wireless acquisition device for receiving the temperature data and the pressure data.

4. The LabVIEW-based automobile coolant temperature and brake air pressure acquisition device of claim 3, wherein, The host computer and the second wireless acquisition device are connected through a main serial port.

5. The LabVIEW-based automobile coolant temperature and brake air pressure acquisition device of claim 4, wherein, The register is connected to the main serial port and the second wireless acquisition device.

6. The LabVIEW-based automobile coolant temperature and brake air pressure acquisition device of claim 5, wherein, The application further comprises: a sub-data processor arranged between the register and the divider.

7. The LabVIEW-based automobile coolant temperature and brake air pressure acquisition device of claim 6, wherein, The divisor of the divider is 10.

8. The LabVIEW-based automobile coolant temperature and brake air pressure acquisition device of claim 7, wherein, The at least one temperature sensor is a WRNK-191 thermocouple.

9. The LabVIEW-based automobile coolant temperature and brake air pressure acquisition device of claim 8, wherein, The first wireless acquisition device and the second wireless acquisition device are both RS485 double-signal enhanced Lora modules.

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