在工农业生产、国防建设和科学实验中,对机械振动的测量、试验和控制提出了愈来愈高的要求。各种测振仪器和测振设备都少不了振动传感器。传感器是在测量过程中感受振动,并将其转换成某种形态信息的一种器件。振动传感器的种类繁多。如果按其所测的振动参数,可分为位移型、速度型和加速度型;如果按其结构原理,可分为磁电式、压电式、应变式、电感式、电容式、涡流式以及激光和微波式等,而目前以磁电式和压电式传感器应用得最为普遍。磁电式振动传感器的原理是利用金属导线在磁场中作切割磁力线的相对运动时,产生与所测振动速度成正比例的感应电动势,从而测量出振动的速度。若让该感应电动势再经过积分或微分,则可测出振动的位移或加速度。低频机械振动的特点是频率低(几十分之一赫兹到几十赫兹),振幅大(几毫米甚至几十毫米),因此要求低频振动传感器也应能在相应的低频和大振幅的条 In industrial and agricultural production, national defense construction and scientific experiments, higher and higher requirements are put forward on the measurement, testing and control of mechanical vibration. A variety of vibration measurement equipment and vibration measurement equipment are indispensable vibration sensor. A sensor is a device that senses vibration during measurement and converts it into some form of information. A wide range of vibration sensors. According to its measured vibration parameters can be divided into displacement type, speed type and acceleration type; if according to the principle of its structure, can be divided into magnetic, piezoelectric, strain, inductance, capacitance, eddy current and Laser and microwave type, etc., and the current magnetic and piezoelectric sensors are most commonly used. Magnetoelectric vibration sensor principle is the use of metal wire in the magnetic field for cutting the relative movement of magnetic lines, the measured vibration velocity is proportional to the induced electromotive force to measure the speed of vibration. If the induced electromotive force and then through the integration or differential, you can measure the vibration displacement or acceleration. Low-frequency mechanical vibration is characterized by low frequencies (a few tenths of a Hertz to several tens of hertz) and large amplitudes (a few millimeters or even tens of millimeters), thus requiring low-frequency vibration sensors should also be able to low-frequency and large amplitude of the corresponding article