Four-steady-state crash sensor

Abstract

A four-steady-state crash sensor comprises a three-layer oblique supporting beam structure mainly composed of a mass block, parallel beams, a fixed block and a contact set in an interior-exterior nested mode. The four-steady-state crash sensor can quickly judge crash strength grades and send out control signals without a processor and a drive device. The four-steady-state crash sensor has the advantages of being simple in structure, reliable in contact and high in anti-electromagnetic interference capacity, the drive device is not needed, and multi-threshold intelligent sensing can be achieved.

Description

technical field [0001] A four-stable collision sensor belongs to the technical field of precision micro-electromechanical systems and collision sensors. Background technique [0002] The collision sensor can accurately sense the collision intensity, and judge the degree of collision risk according to the preset threshold, and provide reliable decision-making information for the complete protection control system. application prospects. [0003] As a key sensor of the safety control system, the collision sensor not only needs to quickly and accurately assess the collision direction and degree of danger, and connect the safety protection circuit, but also consider the influence of interference factors in the application environment, which limits some multi-physics-based The application of sensors developed by field effects, such as the energy consumption and anti-interference problems of magnetic field and electric field sensors. At present, the function of the collision sen...

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Problems solved by technology

[0003] As a key sensor of the safety control system, the collision sensor not only needs to quickly and accurately assess the collision direction and degree of danger, and connect the safety protection circuit, but also consider the influence of interference factors in the application environment, which limits some multi-physics-based Application of sensors developed by field effect, such as energy consumption and anti-interference problems of magnetic field and electric field sensors

At present, the function of the collision sensor is mainly focused on the single-threshold single-direction collision sensing, and it is difficult to judge more than two consecutive collisions or to judge the collision intensity, etc.

The electronic collision sensor mainly relies on the accelerometer to sense the collision, and at the same time requires a complex test circuit and signal processing circuit, which not only increases the cost of the sensor measurement system, but is also subject to the working accuracy of the accelerometer and the influence of environmental interference, etc., which seriously affects Improve the response speed and reliability of the safety system

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