The structure of the commonly used piezoelectric acceleration sensor is divided into: spring, the mass, pedestal, piezoelectric element, clamping ring. Piezoelectric element - mass spring system is installed on the pillar in the center of the circle, pillar and base connection. This structure has high resonant frequency. Base connected to the test object, however, if there is a deformation of base will directly affect the vibration pickup output. In addition, the test object and environment temperature changes will affect the piezoelectric element, and makes the pre-tightening force changes, easy cause temperature drift. Piezoelectric element by the clamping ring clip on the column in the center of the triangle. Piezoelectric acceleration sensors axial vibration, the piezoelectric element under shear stress. The structure of base deformation and temperature change has very good isolation effect, had a higher resonance frequency and a good linear. Ring shear, simple structure, can make it very small, high resonance frequency of the accelerometer, circular piece of adhering to the quality on the circular piezoelectric element in a central pillar. Because of the binder would soften with the temperature increases, so the highest working temperature is limited.

Piezoelectric acceleration sensor using the limit frequency depends on the amplitude frequency curve of the resonant frequency, generally small damping (z < = 0.1) of the piezoelectric acceleration sensor, the upper limit frequency if off for 1/3 of the resonance frequency, can guarantee the amplitude error is less than 1 db (i.e. 12%); If off for 1/5 of the resonance frequency, can guarantee the amplitude error is less than 0.5 dB (i.e. 6%), the phase shift is less than 30. But the resonant frequency is associated with the fixed position of piezoelectric acceleration sensor, piezoelectric acceleration sensor factory of amplitude-frequency curve is given under the condition of rigid connection of the fixed. Actual use of the fixed methods are often difficult to achieve rigid connection, thus resonance frequency and the use of upper limit frequency will be decreased. Which adopts steel bolt, is the resonance frequency can reach the factory resonance frequency of the best ways. All bolts shall be screwed into the base screw hole, lest cause deformation of base, affect the output of the piezoelectric acceleration sensor. Layer of the tu yi on the installation on the surface of the silicon grease can increase uneven installation connection reliability. Need insulation can be fixed with bolts and mica insulation gasket piezoelectric acceleration sensor, but the washers should book as far as possible. The piezoelectric acceleration sensor with a layer of thin wax stick to the specimen on the flat surface, can also be used for low temperature (below 40 ℃). Hand-held probe vibration method, multipoint tests using special convenient, but the measurement error is bigger, poor repeatability, generally don't use upper limit frequency above 1000 hz. With special permanent magnet fixed piezoelectric acceleration sensor, easy to use, how to use in the low frequency measurement. This method can also be to insulate the piezoelectric acceleration sensor and the specimen. Use hard adhesive bolt or bonding agent of fixed method also long use. Some typical piezoelectric acceleration sensor using the fixed methods of resonance frequency respectively about: steel bolt method 31 KHZ, mica gasket 28 KHZ, 29 KHZ, wax coating thin layer with method 2 KHZ, permanent magnet fixed method 7 KHZ.