A real-time slope sensor for automobiles and its application method

A slope sensor and automotive technology, applied in the field of automotive sensors, can solve the problems of low accuracy and unsuitable for dynamic measurement, and achieve the effects of high accuracy, enhanced driving comfort, and improved dynamic performance.

Active Publication Date: 2019-04-30
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects and problems of being unsuitable for dynamic measurement and low precision in the prior art, and to provide a real-time slope sensor suitable for dynamic measurement and high precision for automobiles and its use method

Method used

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  • A real-time slope sensor for automobiles and its application method
  • A real-time slope sensor for automobiles and its application method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] see figure 1 and figure 2 , a real-time gradient sensor for automobiles, comprising a processor 1, a CAN communication module 2, a motion processing module 3 and a power module 4, the output of the power module 4 is connected to the processor 1, the CAN communication module 2, and the motion processing module 3 The power input end of the processor 1 is electrically connected, the signal input end of the processor 1 is connected with the signal output end of the CAN communication module 2 and the motion processing module 3, and the signal input end of the CAN communication module 2 is connected with the vehicle speed measuring device 5. connected, and the motion processing module 3 includes a chip and an accelerometer 31 and a gyroscope 32 integrated thereon.

[0051] A method for using the real-time gradient sensor for the above-mentioned automobile, the method for using may further comprise the steps:

[0052] The first step: the processor 1 first reads the vehicle ...

Embodiment 2

[0056] Basic content is the same as embodiment 1, the difference is:

[0057] The CAN communication module 2 is signal-connected to the vehicle speed measuring device 5 through the CAN bus, and the processor 1 is signal-connected to the motion processing module 3 through the IIC bus. The vehicle speed measuring device 5 is a gearbox control unit. The processor 1 is an embedded processor, and the model of the chip it adopts is STM32F103; the model of the chip adopted in the motion processing module 3 is MPU6050. The input voltage of the power module 4 is 5 volts, and the output voltage is 3.3 volts.

Embodiment 3

[0059] Basic content is the same as embodiment 1, the difference is:

[0060] In the first step, the processing of the collected vehicle speed signal to obtain the equivalent slope value refers to: the processor 1 first establishes an array according to the collected vehicle speed signal, and a vehicle speed signal corresponds to a data in the array, And perform FIFO operation on the data in the array, and then perform mean filtering on the first half and the second half of the data in the array respectively, then subtract the two filter values ​​obtained, and then divide by time to calculate the longitudinal acceleration of the vehicle, and then Use the vehicle longitudinal acceleration to back calculate the equivalent slope value.

[0061] The FIFO operation of the data in the array refers to: using the collected vehicle speed signal as data, the data is stored in the array in order, and each time a new data is received, the data in the array is moved forward one bit, and th...

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Abstract

The invention relates to a real gradient sensor for an automobile. On the basis of a processor and a CAN communication module, a movement processing module and an automobile speed measurer are additionally arranged; the movement processing module comprises an accelerometer and a gyroscope; the movement processing module can provide acceleration measuring values in the X,Y and Z directions and measuring values of inclination angles around X,Y and Z axes for the processor in real time; the automobile speed measurer can provide real-time automobile speed signals for the processor. In the use process, firstly, the automobile speed signals are processed to obtain equivalent gradient values; meanwhile, the acceleration measuring values are processed to obtain inclination angles; then, the inclination angles and the equivalent gradient values are subjected to primary correction; next, the measuring values of inclination angles around X,Y and Z axes and the primary correction values are subjected to secondary correction to obtain a final output gradient signal. The real gradient sensor is suitable for dynamic measurement; the precision is high; the dynamic performance and the economical performance of vehicle driving are favorably improved; the compatibility is high; the cost is low; the popularization and the application are easy.

Description

technical field [0001] The invention relates to a sensor for vehicles, which belongs to the technical field of sensors used in vehicles, in particular to a real-time slope sensor for vehicles and a method for using the same, and is particularly suitable for high-precision dynamic measurement of vehicle slopes during driving. Background technique [0002] In the traditional automatic mechanical transmission (AMT) system, because the gradient signal cannot be obtained, the gear shift strategy only calculates the target gear position of the gearbox based on the two parameters of vehicle speed and accelerator signal. In changing road conditions, the two The parameter shift strategy is too mechanized. The two-parameter shift strategy is used to calculate the target gear position of the gearbox. When it is necessary to ensure the dynamic performance of the vehicle on the slope, it cannot take into account the fuel economy. When it is necessary to improve the fuel economy of the veh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C9/00
CPCG01C9/00
Inventor 蒋立伟朱江万四禧郑伟叶新伟
Owner DONGFENG COMML VEHICLE CO LTD
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