Advanced Development of the Digital Feedback Seismometer

数字反馈地震仪的先进研制

• 批准号: 8708239
• 负责人: Jonathan Berger
• 金额: $ 5.9万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-10-15 至 1989-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8708239&HistoricalAwards=false
• 关键词: Advanced; Development; Digital; Feedback; Seismometer

Seismology depends on the measurement of ground motion by sensors involving an inertial mass to produce an accelerogram. This proposal requests support for the development of a seis- mometer that will incorporate a digital controller in the feedback loop mechanism of a force balance accelerometer. The system is constructed so that position of the inertial mass (the error signal) is digitized at a high rate and then sent to a microprocessor which modifies the signal in the desired manner to perform, for example, digital integration or compensation. The microprocessor input is then passed to a digital-to-analog converter or other output device to produce the controlling forces on the inertial mass of the sensor. The seismic signal consequently comes from the controller at a rate and precision (number of bits) tailored to the output desired for any given application. A prototype seismometer of the proposed design will yield the following improvements over current analog systems: overall system simplification, stable linear response and accurate calibration, increased dynamic range and adaptability to a variety of transducer systems.

地震学依赖于传感器对地面运动的测量，这些传感器涉及惯性质量，以产生加速度图。这项提议要求支持开发一种地震仪，它将在力平衡加速度计的反馈回路机构中包含一个数字控制器。该系统被构造为使得惯性质量的位置(误差信号)以高速率被数字化，然后被发送到微处理器，该微处理器以所需的方式修改信号以执行例如数字积分或补偿。然后将微处理器输入传递到数模转换器或其他输出设备，以产生传感器惯性质量上的控制力。因此，地震信号以适合任何给定应用所需输出的速率和精度(位数)来自控制器。所设计的样机将比目前的模拟系统有以下改进：整体系统简化，稳定的线性响应和准确的校准，增加的动态范围和对各种传感器系统的适应性。