摘要
针对高精度短距离测量的需要,以现场可编程门阵列(FPGA)为控制核心,采用高精度时间数字转换芯片TDC-GP1和433 MHz超再生射频发射、接收模块,设计了一种高精度的到达时间差(TDOA)测距系统。该测距系统由发射节点与接收节点组成,其中发射节点由FPGA控制433 MHz超再生射频信号与超声波信号的同步实时发射;接收节点将接收的射频信号与超声波信号,经过TDC-GP1进行TDOA测量,并由FPGA完成对TDC-GP1的测量参数配置、测量结果读取及串口上传到上位机。该测距系统由Zig Bee无线通信模块对发射和接收模块进行测量过程协调,并对超声波传播速度进行温度补偿。实验结果表明:该测距系统具有精度高、可靠性高等优点,并易扩展为无线定位系统,具有良好的应用价值。
Aiming at need of high precision ranging, a high precision ranging system of time difference of arrival （TDOA） , which is controlled by field programmable gate array（FPGA） , use TDC-GP1 high precision time digital transfer chip and 433 MHz super regeneration RF transmitting and receiving module, is designed. The system is composed of transmitting node and receiving node. In the transmitting node ,433 MHz super regeneration RF signal and ultrasonic wave signal are transmitted synchronously by FPGA. In the receiving node, time arrival difference of received RF signal and ultrasonic signal is measured by TDC-GP1, measurement parameter configuration, measurement results read out of TDC-GP1 and serial data upload to host computer are finished by FPGA. In the system, measurement process is coordinated by Zig Bee wireless communication modules and receiving module and temperature is measured for compensating ultrasonic wave propagation speed. Experimental results show that the ranging system has broad prospect in application with advantages of high precision and reliability, and can be applied easily for wireless positioning system.
出处
《传感器与微系统》
CSCD
北大核心
2013年第10期93-95,105,共4页
Transducer and Microsystem Technologies
基金
国际自然科学基金资助项目(51275149)
关键词
现场可编程门阵列
TDC—GP1
到达时间差
高精度测距
field programmable gate array （ FPGA ）
TDC-GP1
time difference of arrival （ TDOA ）
high precision ranging
