When we use an accelerometer, the output signal is sometimes distorted when it is measured in a low-frequency situation. We can't find the cause of the fault with a variety of measurement and judgment methods, which makes us very headache. Fiberglass Tape Measure,Tape Line Measure,Magnet Tape Measure,Abs Fiberglass Tape Measure Shangqiu Hengli Measuring Tools Co.,Ltd , https://www.jjmtools.com
Analysis of Causes of Distortion of Low Frequency Measurement Signal of Acceleration Vibration Sensor
When we use the accelerometer vibration sensor http://Product_b54.html, we sometimes encounter distortions in the output signal when measuring in low frequency. We can't find the cause of the fault with a variety of measurement and judgment methods, which makes us very headache. Here are some of the factors that cause the distortion of the measurement results for the low-frequency measurement situation:
First, the system low frequency response difference
There are two reasons for this: the stop frequency of the low-frequency response of the acceleration vibration sensor is not low enough; the cut-off frequency of the constant current voltage source or charge amplifier used with the sensor is not low enough. For the first case, it is necessary to check the low-frequency response of the sensor (which can be judged by measuring the time constant), and select a low-frequency sensor. In the second case, the low-frequency cutoff frequency of the constant current voltage source and the charge amplifier must be properly selected.
Second, the system low frequency signal to noise ratio difference
Most of this happens because the low-frequency noise of the acceleration vibration sensor is large, which requires the selection of a sensor that satisfies the low-frequency signal-to-noise ratio.
Third, the impact of the external environment on the measurement signal
This mainly considers the influence of the transient ambient temperature on the vibration sensor. The sensor can be insulated and the sensor with a small temperature response coefficient can be avoided.
Therefore, as long as the distortion of the low-frequency measurement signal of the acceleration vibration sensor occurs, it is only necessary to compare the above three points to see which factor is caused, and to solve the problem in a targeted manner, which can achieve a multiplier effect.
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Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn