车速传感器和压电陀螺仪数据采集系统的设计

Design and realization of sampling system based on speed sensor and gyroscope

利用车速传感器和压电陀螺仪进行汽车的航位推算,成功解决由于GPS信号被遮挡不能定位的情形。汽车多传感器数据采集系统设计以单片机ATMEGA8和数据处理电路为核心,给出了部分硬件设计原理图和单片机程序设计流程图。速度信号采集电路将不同车速转变成的不同频率的脉冲信号输入到单片机进行控制与计算;压电陀螺仪采集电路把汽车转向的角加速度通过一次积分为角速度再传给单片机进行A/D转换,最后通过串口传送给PC机,用PC机终端程序进行测试,测试结果表明,该车速和方向传感器数据采集系统软硬件系统工作稳定正常。

Dead reckoning of cars is widely used in positioning with speed sensor and gyroscope when the GPS signal is obstructed. This paper introduced design ＆ realization of sampling system based on speed sensor and gyroscope. The system was based on single chip processor ATMEGA8. Its hardware principle circuit and the software flow figure were given. The different frequency pluses based on different speed was generated by sensor and sent them into single chip processor. Signal from gyroscope was transmitted to ADC after once integrating. Then the voltage sent it to PC through serial bus. The measuring result proved validity and stability of the system.