多传感轨道扣件检测的数据同步采集系统设计

Design of Data Synchronous Acquisition System for Multi-Sensor Track Fastener Detection

摘要:

针对轨道扣件检测的多传感数据同步采集,首先,在分析线阵CCD相机成像原理的基础上,根据系统的要求对相机的关键参数进行了选择并设计了采集方案。然后,设计了传感器的信号调理电路,包括电平调整电路以及抗混叠滤波器的设计,提高了传感器的抗干扰能力。并通过STM32获取光电编码器的等间隔脉冲信息,对各个传感器进行触发控制,设计了线阵相机与惯性传感器的同步触发方案。最后,编写了上位机软件实现了数据的同步采集。实验结果表明,该系统能够精确采集各传感器的数据,具有较强的抗干扰能力和稳定性。

Abstract:

In order to realize synchronous acquisition of multi-sensor data for track fastener detection, first , based on the analysis of the imaging principle of linear array CCD camera, the key parameters of the camera are selected and the acquisition scheme is designed according to the requirements of the system. Then, the signal conditioning circuit of the sensors is designed, including the design of level adjustment circuit and anti-aliasing filter, which improves the anti-jamming capability. Equal interval pulse of photoelectric encoder is obtained through STM32 to trigger each sensor. A synchronous trigger scheme for linear array camera and inertial sensor is designed. Finally, the synchronous acquisition of data is realized by the authoring software of the upper computer. The experimental results show that the system can collect data of each sensor accurately, and has strong anti-interference ability and stability.