QA-FB type three-way force balance accelerometer Introduction: The QA-FB force balance accelerometer (network access permit signal from the National Seismological Administration) is a high-performance accelerometer mainly designed for the earthquake monitoring and structural vibration monitoring industry. It is based on mechanical and electronic feedback technology and force balance technology, and has the characteristics of large dynamic range, good linearity, wide frequency band, and flat acceleration. This sensor consists of sensitive components and processing circuits. The sensitive components adopt high-performance magnetic cylinders from Germany, which come with online calibration functions; The processing circuit adopts ultra-low noise amplifiers, high voltage stabilizing chips, and filtering chips, making it highly sensitive, high-resolution, good low-frequency performance, lower frequency bandwidth, self calibration, low power consumption, and other advantages. The force balance accelerometer is a type of accelerometer recommended by relevant standards in the fields of earthquake monitoring, bridge safety monitoring, and wind turbine support structures; Compared to piezoelectric accelerometers, it has the advantages of high sensitivity, wide lower limit frequency, good low-frequency characteristics, high resolution, and self calibration; Compared to electromagnetic accelerometers, it has the advantages of wide lower frequency limit, high resolution, and self calibration; Compared to MEMS accelerometers, it has the advantages of high resolution, self calibration, good low-frequency characteristics, and high sensitivity. Application field: Seismic monitoring of hydropower stations; Bridge seismic monitoring; Vibration monitoring of wind turbine towers; Slope seismic monitoring; Tunnel seismic monitoring; Earthquake monitoring of high-rise buildings. Technical parameters: Measurement range: ± 2.0g Sensor principle: Mechanical force balance accelerometer Acceleration resolution: 0.000002g Sensitivity: 2.5V/g Frequency response: adjustable from 0 to 30Hz/0 to 100Hz/0 to 200Hz Dynamic range: ≥ 145dB Linearity error: ≤ 1% Lateral sensitivity ratio: ≤ 1% (including angular deviation) Root mean square value of noise: ≤ 10-6g Zero drift: ≤ 300ug/℃ Equipped with calibration function: pulse, sine wave, and square wave calibration
Introduction: The QA-FB force balance accelerometer (network access permit signal from the National Seismological Administration) is a high-performance accelerometer mainly designed for the earthquake monitoring and structural vibration monitoring industry. It is based on mechanical and electronic feedback technology and force balance technology, and has the characteristics of large dynamic range, good linearity, wide frequency band, and flat acceleration. This sensor consists of sensitive components and processing circuits. The sensitive components adopt high-performance magnetic cylinders from Germany, which come with online calibration functions; The processing circuit adopts ultra-low noise amplifiers, high voltage stabilizing chips, and filtering chips, making it highly sensitive, high-resolution, good low-frequency performance, lower frequency bandwidth, self calibration, low power consumption, and other advantages. The force balance accelerometer is a type of accelerometer recommended by relevant standards in the fields of earthquake monitoring, bridge safety monitoring, and wind turbine support structures; Compared to piezoelectric accelerometers, it has the advantages of high sensitivity, wide lower limit frequency, good low-frequency characteristics, high resolution, and self calibration; Compared to electromagnetic accelerometers, it has the advantages of wide lower frequency limit, high resolution, and self calibration; Compared to MEMS accelerometers, it has the advantages of high resolution, self calibration, good low-frequency characteristics, and high sensitivity. Application field: Seismic monitoring of hydropower stations; Bridge seismic monitoring; Vibration monitoring of wind turbine towers; Slope seismic monitoring; Tunnel seismic monitoring; Earthquake monitoring of high-rise buildings.
