Piezoelectric Accelerometer known piezoelectric accelerometer

Piezoelectric Accelerometer known piezoelectric accelerometer . It also belongs to inertial sensors. It is the use of certain substances, such as quartz crystal piezoelectric effect , the acceleration sensor by vibrating when added mass force on the piezoelectric element also changes . When the measured frequency is much lower than the natural frequency of the acceleration sensor , the measured change of the force is proportional to acceleration . Since piezoelectric acceleration sensor output signal is weak electric charge , and  Cooling Temperature Sensor  itself has a great resistance, so the output energy is minimal , which gives the circuit caused some difficulties followed . Typically, this is the output of the first sensor signal to a high input impedance preamplifier. After impedance transformation later , get ready for general amplification , signal detection circuit will lose instructions instrument or recorder . Piezoelectric crystal accelerometer transverse sensitivity expressed its transverse ( perpendicular to the axis acceleration  Car Temperature Sensor  ) vibration sensitivity of the transverse sensitivity often the main sensitivity ( ie, sensitivity of the acceleration sensor voltage or charge sensitivity ) expressed as a percentage . Generally on the housing marked with red dots minimum transverse sensitivity direction , an excellent lateral acceleration  Shaft Position Sensor  sensitivity should be less than 3% of the primary sensitivity . Therefore, the piezoelectric acceleration sensor in the test has obvious directionality.