航空／海洋重力仪用加速度计现状与优化方法

采用石英挠性加速度计作为重力敏感器的航空/海洋重力仪是典型的重力信息采集仪器,要求石英挠性加速度计具有一次通电稳定性高、高分辨率、低噪声的特点。为了满足航空/海洋重力仪需求,首先,分析了石英挠性加速度计一次通电稳定性机理,确定了关键影响因素,并给出了优化方向;其次,建立了加速度计分辨率模型,给出了测试方法和后续优化方向;最后,通过试验确定了噪声水平,根据关键影响因素给出了优化方向。通过上述研究的开展,为石英挠性加速度计在重力测量领域中的应用奠定了基础。

Current Status and Improvement of Accelerometers for Airborne/Marine Gravimeter

Airborne/marine gravimeter with quartz flexure accelerometer as the gravity sensor is a typical gravity information measuring instrument.To measure the gravity signal, the high stability, high resolution, and low noise are needed for quartz flexure accelerometer.To meet the needs of the instrument, the following three aspects are studied.Firstly, the stability mechanism is analyzed, and the stability improvement design is presented.Secondly, the resolution model is built, the resolution level is evaluated and the optimization design of improving resolution is advanced.Finally, the noise level is evaluated and the optimization design of noise reduction is provided.Based on the mentioned research, the foundation to carry out the application of accelerometer in the gravity measurement is laid.