The acceleration sensor technology used

AC response acceleration sensors most commonly used AC response acceleration sensor is the use of a piezoelectric element as its sensitive unit. When the acceleration input, the sensor of the sensing mass "move" of the piezoelectric element generates a charge proportional to the input acceleration signal. From the electrical angle of view, as an active piezoelectric element capacitor, its ohmic resistance level at 10x9. Determined by the resistance and capacitance RC time constant, which also determines the frequency of Crankshaft Positioning Sensor through the properties. For this reason, the piezoelectric accelerometer can be used to measure static event. The piezoelectric element may be derived from natural or synthetic. They have different signal conversion efficiency and linearity. There are two types on the market piezoelectric accelerometer - charge output, voltage output. Main charge output piezoelectric acceleration sensor acceleration sensor zirconate titanate ceramics, has a wide operating temperature range, wide dynamic range, wide frequency range (usable frequency> 10kHz). Charge output of the piezoelectric type Camshaft Position Sensor is encapsulated in an airtight ceramic metal housing. Due to the ability to resist harsh environments, which has a very good durability. Because of its high impedance, this sensor requires a charge amplifier and low noise with shielded cable is used, preferably a coaxial cable. Low noise cable is a finger which has a low friction electrical noise, which is generated by the movement of the noise from the cable itself. Many sensor manufacturers also offer this low-noise cable. Charge amplifier and charge output type acceleration Automotive Temperature Sensors connection, which can eliminate the cable capacitance and the impact of the sensor capacitor in parallel. With advanced charge amplifier, charge output type acceleration sensor is easy to achieve wide dynamic response (> 120dB). Since the piezoelectric ceramic is very wide temperature range, some sensors may be used to -200 ° C to +400 ° C, or even wider temperature environment. They are particularly suitable for vibration testing under extreme temperatures, such as turbine engine monitoring.