基于激光传感器，设计了一种车辆超高检测系统。该系统运用发射传感器阵列和接收传感器阵列形成激光光幕，通过判断传感器是否被遮挡，可以精确地检测车辆具体超高高度。针对日光、强光干扰现象，在硬件电路设计方面，采用光调制与光解调处理方法。光调制与解调方法使激光信号变成离散信号，可有效解决自然光中连续光信号的干扰现象。软件设计方面采用Freescale
MC9S12DG128单片机对发射信号进行控制，对接收信号进行处理，程序简单易行，执行效率高。该超高检测系统采用激光传感器，抗干扰能力强，测量精度高，能够实现车辆高度动态测量，检测时车辆速度可达30km/h，测量精度高、检测效率快，并且可以测量镂空物体高度。在实际检测实验中，该检测系统检测精度可达5cm，检测范围4~6m。该系统可以广泛应用于城市道路和高速公路车辆超高检测站，以减少大货车卡桥、撞桥事故的发生。
A detection system for ultrahigh vehicle is designed based on laser sensor. A laser screen is formed through emission sensors and receiving sensors, and the exact height of ultrahigh parts can be measured by judging whether the signals of the sensors are blocked. Optical modulation and optical demodulation are adopted for the design of hardware circuit in view of the interference of sunlight and strong light, to turn the laser signals into discrete signals. In this way, the problems of the interference of continuous light signals in nature can be solved effectively. In the software design, the Freescale MC9S12DG128 singlechip is used to control the emission signal and process the received signal, with a simple but very efficient program. Laser sensors are used in this detection system due to the strong anti-interference ability and the high accuracy to achieve dynamic measurement of vehicle height. The vehicle speed can be as high as 40km/h, and the system not only enjoys high measurement accuracy and high detection efficiency, but also can measure the height of hollow objects. In the actual detection experiment, the accuracy of the system can reach 5cm and, the detection range can be from 4m to 6m. The system is widely used in urban roads and highways to prevent large trucks from blocking in bridges or colliding with bridges.
