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Mechanical collision acceleration sensor with dual-induction threshold value

An acceleration sensor, mechanical technology, applied in the direction of measuring acceleration, speed/acceleration/impact measurement, instruments, etc., can solve the problems of small resistance to external interference, single threshold, complex structure, etc., to achieve easy mass production, easy processing and The effect of manufacturing, wide application prospects

Inactive Publication Date: 2014-05-28
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of the above-mentioned current collision sensors with a single threshold, low ability to resist external interference, and complex structure, the present invention provides a purely mechanical structure collision sensor with two thresholds and three stable states, which belongs to the passive safety of vehicles, aerospace, and instrumentation In the fields of drop protection systems, consumer electronics systems and toys, etc., it can be used as a trigger switch for passive safety transpositions such as automotive airbags, and can also be used as a trigger switch for locks when docking spacecraft

Method used

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  • Mechanical collision acceleration sensor with dual-induction threshold value
  • Mechanical collision acceleration sensor with dual-induction threshold value
  • Mechanical collision acceleration sensor with dual-induction threshold value

Examples

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Embodiment example 1

[0034] figure 1 A first steady-state diagram of a mechanical crash acceleration sensor with dual sensing thresholds is shown. In the figure, a mechanical collision acceleration sensor with dual sensing thresholds includes an axisymmetric mass with contacts 2, a central contact 5, a hoop shell 6, a hoop moving contact 3 and a flexible beam contact 4, a hoop shell 6 A plurality of first support beams 1 and a plurality of flexible beam contacts 4 are arranged in the inner circumferential direction. Each first support beam 1 is connected to an axisymmetric mass 2 with contacts located in the center of the hoop shell 6. The first support The beam 1 is correspondingly arranged above the flexible beam contact 4, the number of the flexible beam contact 4 is the same as the number of the first support beam 1, and the flexible beam contact 4 is connected to the hoop moving contact 3 connected to the first support beam 1. In cooperation, the axisymmetric mass 2 with contact is matched wit...

Embodiment example 2

[0044] Figure 5 , 6 7 shows the structure diagram of another multi-threshold collision acceleration sensor. In the figure, on the basis of embodiment 1, a non-axisymmetric mass block 7 with contacts is used to replace the axisymmetric mass block 2 with contacts in embodiment 1, and the other structures remain unchanged. This type of sensor produces an asymmetric jump when a collision occurs, and also produces three steady states, Image 6 versus Figure 7 Is the second steady state position and the third steady state position of the structure, and the force and displacement curves during the jump are as Figure 8 Shown.

[0045] Figure 8 The force-displacement curve of the sensor action process is given. When the felt inertial force is less than the first threshold force, the structure presents a state of positive stiffness, and the reaction force increases with the increase of displacement; the inertial force is greater than the first threshold force and the structure crosses t...

Embodiment example 3

[0049] Picture 9 The structure diagram of another multi-threshold collision acceleration sensor is given. In the figure, on the basis of embodiment 1, part of the beams in the first support beam 1 are replaced with the second support beam 8. The materials of the first support beam 1 and the second support beam 8 are different, resulting in the asymmetry of the structure itself , The rest of the structure is consistent with the structure in Example 1. When there is an external collision, the axisymmetric mass 2 with contact moves downward under the action of inertial force, due to the materials of the first support beam 1 and the second support beam 8 The difference causes the stiffness of the first support beam 1 and the second support beam 8 to be different. Since the axisymmetric mass 2 with contacts generates the same pressure at each support position, the first support beam 1 and the second support beam 8 generate The different deflection makes the structure jump asymmetri...

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Abstract

The invention provides a mechanical collision acceleration sensor with a dual-induction threshold value, and belongs to the technical field of vehicle passive safety and the like. A first support beam of a sensor body is connected with an inertia mass block with a contact, in the centre of an annular shell, the first support beam is correspondingly arranged above a contact of a flexible beam, the contact of the flexible beam is matched with an annular movable contact connected with the first support beam, and the inertia mass block with the contact is matched with a centre contact connected with the annular shell. Under the effect of inertia force, the annular movable contact is driven to be contacted with the contact of the flexible beam to detect a first collision threshold value, and when the threshold value is over the first threshold value, the inertia mass block with the contact continuously downwards moves to be contacted with the centre contact so as to detect a second collision threshold value. The sensor has the functions of being simple in structure, fast in response, high in precision, accurate in action and high in reliability, and has the electromagnetic interference resistant effect, has the digital output and flexible self-locking functions, and has a wide application prospect in the fields of vehicle passive safety, aerospace, instrument falling protective systems and the like.

Description

Technical field [0001] The invention relates to a mechanical collision acceleration sensor with dual sensing thresholds, which belongs to the fields of vehicle passive safety, aerospace, instrument drop protection systems, civil consumer electronic systems, toys and the like. It can be used as a trigger switch for passive and safe transposition of car airbags, etc., and can also be used as a trigger switch for locks when docking spacecraft. Background technique [0002] The mechanical collision acceleration sensor with dual sensing thresholds has two set collision thresholds, and can judge the hazard degree of the collision according to the acceleration at the time of the collision, and provide clear signals for the actuators such as protection devices, and provide personnel or specific equipment. Reliable and effective protection, so it has a wide range of application prospects in the field of automobile collision safety and impact protection. [0003] As a collision sensor devic...

Claims

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Application Information

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IPC IPC(8): G01P15/097
Inventor 赵剑高仁璟魏岩刘书田
Owner DALIAN UNIV OF TECH
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