基于加速度计的路形计算方法研究

Calculation Algorithm Research of Road Shape Based on Accelerometers

传统的路形测量方法测量过程复杂且测量精度低,为了降低路形测量的难度以及提高路形计算的准确性,提出了一种基于加速度计的路形计算方法,主要由2个加速度计、一个激光位移传感器组成的测量系统为硬件条件,以加速度计所检测到的检测梁纵向加速度信号作为计算机主要输入信号,经过MATLAB软件滤波处理并对其进行二次积分所得到的检测梁纵向位移作为主要计算参数而求得道路的纵断面形状。在真实的道路上进行了验证,结果表明,所求得的路形与实际的路形接近,吻合度较好。计算方法具有结构简单,精度较高等优点,可满足对大多数路面形状的测量需求。

The traditional measurement method of the road shape is complex and has low accuracy. In order to re- duce the difficulty of measuring road shape and improve the accuracy of calculation of road shape, a calculation algo- rithm of the road shape is presented based on accelerometers. The algorithm mainly uses the measuring system as hardware condition, which is made of two accelerometers and a laser displacement sensor, and uses the longitudinal acceleration signal of the detection beam which is detected by the accelerometers as the main input signal for the com- puter. Then the longitudinal displacement of the detection beam is obtained by filtering and two integrals through the MATLAB, and used as the main calculation parameter to get the vertical section of the road shape. The method is tested in the real roads and the result proves that the calculated road shapes are closed to the real road shapes. The algorithm has the advantage of simple structure and high precision. It can fulfill the requirement of measuring most of the road surface shape.