Detection device and detection method of road longitudinal slope based on accelerator pedal position and vehicle speed

Abstract

The invention discloses a detection device and a detection method of a road longitudinal slope based on the accelerator pedal position and the vehicle speed. The detection device is composed of a micro controller unit, a rotary encoder, an optoelectronic isolator and a serial port output module. The detection method comprises the following steps: detecting the accelerator pedal position by means of the rotary encoder which is installed on an accelerator pedal shaft according to the speed change of a vehicle when the vehicle runs on the slope pavement, and calculating real-time vehicle traction; and sampling the vehicle speed and calculating the accelerated speed of the vehicle by means of the speed difference of the adjacent sampling instants and the sampling period. Due to the facts that signals are processed by means of the micro controller unit, the sum of the rolling friction force and the weight component containing information of the slope angle can be obtained by means of joint force, traction force and air resistance when the vehicle runs, and the road slope angle can be estimated. The detection device and the detection method of the road longitudinal slope based on the accelerator pedal position and the vehicle speed has the advantages that the change of the vehicle is small, the cost is low, only the accelerator pedal position and the speed of the vehicle are needed to be detected, the method is simple and convenient, and the misjudgment rate is low.

Description

Technical field: [0001] The invention belongs to the field of safe driving of automobiles and the field of automatic signal detection, in particular to a dynamic detection device and method for a road slope angle used for dynamic detection of the slope angle of a vehicle running road section. technical background: [0002] The dynamic detection of road longitudinal slope is of great significance to driving safety. Controlling the vehicle speed according to the longitudinal slope angle of the road can effectively improve the safety of driving. At present, there are mainly GPS method and accelerometer method for longitudinal slope detection. The GPS method calculates the slope based on the three-dimensional position of the vehicle. Although the detection scheme is relatively simple and a single sensor can be used to complete the slope detection, the error of the GPS itself has a great influence on the measurement of the longitudinal slope, and the measurement accuracy is not ...

AI Technical Summary

Problems solved by technology

Although this method is simple and easy to implement, it has high requirements for the installation method, and the installation error of the lateral acceleration and longitudinal accelerometer of the vehicle will bring great errors to the measurement results.

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