Optical fiber acceleration seismometer as an important instrument can offer high sensitivity, anti-jamming and non-touched advantage which has an extensive application field. Its signal processing ability will decide ...Optical fiber acceleration seismometer as an important instrument can offer high sensitivity, anti-jamming and non-touched advantage which has an extensive application field. Its signal processing ability will decide whole system’s performance to some extent because it will affect directly the factors such as resolving power, precision and dynamic range. The signal processing is usually realized by analog circuits which was more inferior in stability, flexibility and anti-jamming to digital processing system. A digital processing system of optical fiber acceleration seismometer has been designed based on the embedded system design scheme. Synthetic-heterodyne demodulation has been studied, and signal processing has been realized. The double processors of ARM and DSP are employed to implement respectively the system control and signal processing, and to provide the output interfaces such as LCD, DAC and Ethernet interface. This system can vary with the measured signal in real time and linearly, and its work frequency bandwidth is between 10Hz and 1kHz. The system has better anti-jamming ability and can work normally when the SNR is 40dB.展开更多
随着MEMS技术的不断发展与成熟,低成本、安装体积小、中精度的惯性测量组合在实际应用中具有重要价值。该文设计了一种基于MEMS的惯性测量组合,该组合由微机械陀螺、加速度计、电源模块和电路板等组成,利用数字信号处理(digital signal ...随着MEMS技术的不断发展与成熟,低成本、安装体积小、中精度的惯性测量组合在实际应用中具有重要价值。该文设计了一种基于MEMS的惯性测量组合,该组合由微机械陀螺、加速度计、电源模块和电路板等组成,利用数字信号处理(digital signal processing,DSP)芯片对微机械陀螺和加速度计的信号进行采集,通过建立误差模型进行误差标定补偿,标定后的组合能够实时对外输出三轴角速度和加速度等传感器信息。经试验验证,该标定方法能够修正惯性测量组合的安装误差,精度指标可以满足实际使用需要。展开更多
文摘Optical fiber acceleration seismometer as an important instrument can offer high sensitivity, anti-jamming and non-touched advantage which has an extensive application field. Its signal processing ability will decide whole system’s performance to some extent because it will affect directly the factors such as resolving power, precision and dynamic range. The signal processing is usually realized by analog circuits which was more inferior in stability, flexibility and anti-jamming to digital processing system. A digital processing system of optical fiber acceleration seismometer has been designed based on the embedded system design scheme. Synthetic-heterodyne demodulation has been studied, and signal processing has been realized. The double processors of ARM and DSP are employed to implement respectively the system control and signal processing, and to provide the output interfaces such as LCD, DAC and Ethernet interface. This system can vary with the measured signal in real time and linearly, and its work frequency bandwidth is between 10Hz and 1kHz. The system has better anti-jamming ability and can work normally when the SNR is 40dB.
文摘随着MEMS技术的不断发展与成熟,低成本、安装体积小、中精度的惯性测量组合在实际应用中具有重要价值。该文设计了一种基于MEMS的惯性测量组合,该组合由微机械陀螺、加速度计、电源模块和电路板等组成,利用数字信号处理(digital signal processing,DSP)芯片对微机械陀螺和加速度计的信号进行采集,通过建立误差模型进行误差标定补偿,标定后的组合能够实时对外输出三轴角速度和加速度等传感器信息。经试验验证,该标定方法能够修正惯性测量组合的安装误差,精度指标可以满足实际使用需要。
