为解决IMU和GPS的数据同步问题,对汽车运动参数IMU/GPS组合测试中的数据同步技术进行了研究.根据GPS和IMU信号的特点,在IMU不提供同步脉冲信号并且不改变它们各自结构的前提下,设计并研制了基于CPLD的同步电路.进行了测量汽车运动参数的试验,行驶路径包括直线和弧线,利用同步电路实现了IMU/GPS数据的同步.试验结果表明:该电路能够准确测量同步时差,有效地解决了IMU和GPS数据的时间同步问题;基于该同步电路的IMU/GPS组合测试系统实现了对多种汽车运动参数的高频测量与解算.%To realize the data synchronization between the inertial measurement unit (IMU) and the global positioning system (GPS), the synchronization technology in the IMU/GPS integrated measurement system of vehicle motion parameters is studied. According to the characteristics of the output signals of the IMU and the GPS, without the IMU synchronization signal, the synchronization circuit based on CPLD is designed and developed, which need not alter the configurations of the IMU and GPS. Experiments of measuring vehicle motion parameters, which rely on the synchronization circuit to realize IMU/GPS data synchronization, are made. The driving routes in experiments comprise a curve and a straight line. Experimental results show that the designed circuit can accurately measure the synchronization time difference and the IMU period, and can effectively solve the data synchronization in IMU/GPS integration. Furthermore, the IMU/GPS integrated measurement system based on the synchronization circuit can measure and calculate many vehicle motion parameters in high frequency mode.
展开▼
机译：为解决IMU和GPS的数据同步问题,对汽车运动参数IMU/GPS组合测试中的数据同步技术进行了研究.根据GPS和IMU信号的特点,在IMU不提供同步脉冲信号并且不改变它们各自结构的前提下,设计并研制了基于CPLD的同步电路.进行了测量汽车运动参数的试验,行驶路径包括直线和弧线,利用同步电路实现了IMU/GPS数据的同步.试验结果表明:该电路能够准确测量同步时差,有效地解决了IMU和GPS数据的时间同步问题;基于该同步电路的IMU/GPS组合测试系统实现了对多种汽车运动参数的高频测量与解算.%To realize the data synchronization between the inertial measurement unit (IMU) and the global positioning system (GPS), the synchronization technology in the IMU/GPS integrated measurement system of vehicle motion parameters is studied. According to the characteristics of the output signals of the IMU and the GPS, without the IMU synchronization signal, the synchronization circuit based on CPLD is designed and developed, which need not alter the configurations of the IMU and GPS. Experiments of measuring vehicle motion parameters, which rely on the synchronization circuit to realize IMU/GPS data synchronization, are made. The driving routes in experiments comprise a curve and a straight line. Experimental results show that the designed circuit can accurately measure the synchronization time difference and the IMU period, and can effectively solve the data synchronization in IMU/GPS integration. Furthermore, the IMU/GPS integrated measurement system based on the synchronization circuit can measure and calculate many vehicle motion parameters in high frequency mode.
展开▼
