Dual-threshold three-stable-state collision sensor

Abstract

The invention discloses a dual-threshold three-stable-state collision sensor, belonging to the technical fields of precision micro electro mechanical systems and collision sensors. The dual-threshold three-stable-state collision sensor is mainly characterized in that an outer mass block, an inner mass block, parallel beams, a fixed block, a first contact and a second contact constitute an inside/outside-nested bilayer oblique support beam structure. According to the invention, the collision strength grade can be judged quickly and a control signal can be sent out without a processor and a driving device. When no dangerous conditions exist, the sensor is in a first stable state, when external collision strength exceeds a first danger threshold value and smaller than a second danger threshold value, the inner mass block rapidly comes into contact with the first contact, and the sensor is in a second stable state; when the external collision strength exceeds the second danger threshold value, the outer mass block and the inner mass block come into contact with the first contact and the second contact rapidly at the same time, and the sensor is in a third stable state; and when two collisions occur continuously, the first contact and the second contact of the sensor are connected in sequence. The dual-threshold three-stable-state collision sensor disclosed by the invention has the characteristics of simple structure, multi-threshold-value intelligent sensing capability, reliability in contact, no need of driving, and strong electromagnetic interference resistance.

Description

technical field [0001] A double-threshold tri-stable collision sensor belongs to the technical field of precision micro-electromechanical systems and collision sensors, and can be used in collision safety protection systems, aerospace control systems, weapon systems, instrument drop protection, and patient fall monitoring systems. 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 de...

AI Technical Summary

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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