Capacitive Accelerometer

Capacitance -type ( with changes in acceleration caused by the change in capacitance sensing mass ) acceleration sensor is the most common in today . Irreplaceable in certain areas , such as airbags , cell phones and other mobile devices . High yield and low cost makes such sensors . However, this low signal to noise ratio of the sensor is subject to a low , limited dynamic range . All capacitors type Coolant Temperature Sensor has an internal clock that (~ 500kHz) is an essential part of the detection circuit , the output signal due to leakage often be disturbed. The frequency of this noise is far higher than the measured signal frequency , generally will not affect the measurement result , but it is always and test signals superimposed . A built-in amplifier chip, which generally has a 3-wire ( or 4-wire differential output ) interface. DC power supply will be able to work as long as there is . Capacitance type acceleration Coolant Temperature Sensor working bandwidth is generally limited to a few hundred Hz, partly because of its internal structure with a large and heavy air damping . Capacitance type acceleration sensor suitable for measuring low-range acceleration , the upper limit is generally less than 100g . In addition to these limitations, modern capacitance type acceleration Crank Shaft Position Sensor , in particular a level meter of the device, with good linearity and high stability. Capacitive acceleration sensor is usually appropriate onboard test , low cost is a factor. For low-frequency exercise test , acceleration generally low , they are an ideal choice. Such as civil engineering vibration testing .