基于蓝牙通信的多路采集系统设计

Design of Multi-channel Acquisition System Based on Bluetooth Communication

摘要:

针对地磁、惯导等传感器在转台标定及温箱试验过程中存在有线串口传输存在连接复杂、数据传输干扰严重以及受设备限制使得数据无法传输的问题,设计了一套基于蓝牙通信的小体积、低功耗多路数据采集系统,该系统包括8路12位的模拟信号采集电路和3路数字信号采集电路,采集通道可灵活配置和快速切换,可接收RS-232、RS-422和RS-485串口通信,并通过混合编帧的设计将不同传输速率的传感器数据进行存储和传输,实现了多路传感器数据的无线通信传输,试验结果表明,在转台试验和温箱试验环境下其数据有效传输距离能够达到6米左右,传输速率可达50Kbps,丢帧率低于0.1%,解决了有线串口连接传输距离不够、受干扰严重的问题,简化和改进了传统有线串口通信方式。

Abstract:

Aiming at the problems of complex connection, serious interference in data transmission and device limitation in wired serial port transmission of magnetic and inertial sensors in the process of turntable calibration and temperature box test, a set of small volume and low power multi-channel data acquisition system based on Bluetooth communication is designed. The system includes 8-channel 12-bit analog signal acquisition circuit and 3-channel digital signal acquisition circuit. The acquisition channel can be flexibly configured and quickly switched. It can receive RS-232, RS-422 and RS-485 serial communication, and store and transmit sensor data of different transmission rates through hybrid framing design. The wireless communication transmission of multi-channel sensor data is realized. The test results show that the effective data transmission distance can reach about 6 meters, the transmission rate can reach 50Kbps, and the frame loss rate is less than 0.1% under the environment of turntable test and temperature chamber test. The problem of insufficient transmission distance and serious interference caused by wired serial port connection is solved. The traditional wired serial communication mode is simplified and improved.