Annular charge output element and assembling method thereof

Abstract

The invention discloses an annular charge output element and an assembling method thereof. The annular charge output element comprises a support, and the support is provided with a base and a mounting column; the insulating ring is connected to the mounting column in a sleeving manner; the piezoelectric sensitive element is connected to the insulating ring in a sleeving mode, and the inner side wall and the outer side wall of the piezoelectric sensitive element are each provided with a conductive plating layer; the mass ring is connected to the piezoelectric sensitive element in a sleeving manner; and the pre-tightening ring is connected to the mass ring in a sleeving manner. According to the invention, through the arrangement of the insulating ring and the pre-tightening ring, the piezoelectric sensitive element is insulated from the bracket through the insulating ring and is further insulated from the sensor shell, so that a charge signal can be independently output, and the bracket and the sensor shell bracket do not need to be insulated; the insulating ring, the piezoelectric sensitive element and the mass ring are fixedly mounted on the mounting column of the bracket through the pre-tightening ring; therefore, the device has the advantages of low assembly difficulty, high assembly efficiency, low failure rate and high measurement precision.

Description

technical field [0001] The invention relates to the technical field of acceleration sensors, in particular to a ring-shaped charge output element and an assembly method thereof. Background technique [0002] The acceleration sensor is a test instrument that converts the pressure generated by physical phenomena such as acceleration, vibration, and shock into an electrical signal that is easy to measure. When the piezoelectric acceleration sensor is subjected to vibration excitation, the inertial force exerted on the piezoelectric element by the mass block due to the vibration also changes accordingly. The piezoelectric acceleration sensor uses the "piezoelectric effect" of the piezoelectric element to detect accelerated. [0003] The piezoelectric acceleration sensor is provided with a ring-shaped charge output element, and the ring-shaped charge output element is usually designed to be insulated from the sensor shell. In the prior art, the insulation design of the ring-shap...

AI Technical Summary

Problems solved by technology

[0003] The piezoelectric acceleration sensor is provided with a ring-shaped charge output element, and the ring-shaped charge output element is usually designed to be insulated from the sensor shell. In the prior art, the insulation design of the ring-shaped charge output element is mainly through the way of gluing an insulating pad. The sensor shell is insulated. This method has high requirements for the consistency and reliability of the adhesive process, and is highly dependent on the operating level and experience of employees. It has the disadvantages of difficult assembly and low efficiency; and it may fall off due to poor bonding. Therefore, it also has the defect of high failure rate; and the insulating pad is usually made of aluminum alloy, and the surface insulation is realized by hard anodizing. Since the aluminum alloy material is relatively soft, the overall rigidity of the ring-shaped charge output element is insufficient, which leads to The installation resonance and frequency response index of the piezoelectric acceleration sensor will be reduced, so it also has the defect of reducing the measurement accuracy of the sensor

Images