CN201984083U - Permanent-magnet type collision sensor - Google Patents
Permanent-magnet type collision sensor Download PDFInfo
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- CN201984083U CN201984083U CN201120074504XU CN201120074504U CN201984083U CN 201984083 U CN201984083 U CN 201984083U CN 201120074504X U CN201120074504X U CN 201120074504XU CN 201120074504 U CN201120074504 U CN 201120074504U CN 201984083 U CN201984083 U CN 201984083U
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Abstract
The utility model discloses a permanent-magnet type collision sensor, which mainly solves the problems of collision-detecting inaccuracy, poor stability after contact-point contact, poor anti-interference capability and need of outside continuous energy supply existing in a magnetic-attraction type collision sensor in the prior art. The sensor comprises a cantilever-beam structure, a permanent-magnet combined structure and a bridging-type contact-point structure, wherein the cantilever-beam structure comprises a shell (3), a flexible beam (2) and a mass block (1), the permanent-magnet combined structure comprises a moveable magnetic block (4) and a fixed magnetic block (5), and the bridging-type contact-point structure comprises a movable contact point (6) and a fixed contact point (7). When the collision strength reaches a danger threshold value, the mass block (1) vertically moves under the driving of the flexible beam (2), the movable contact point (6) is driven to be contacted with the fixed contact point (7), and the contact stability is maintained by means of a permanent-magnet attraction force after contact. The sensor has the characteristics of detecting accuracy, after-contact stability maintenance and low power consumption. The sensor can be used as a key inductive element to be applied to vehicle safety systems, electronic-equipment protecting systems and aerospace protecting systems.
Description
Technical field
The utility model belongs to technical field of electronic components, and particularly a kind of magneto crash sensor can be used for the accurate detection to collision strength.
Background technology
Crash sensor can collision detection intensity; when collision strength reaches dangerous threshold value; adhesive by metal electrode is sent signal with the switch switching that disconnects the realization circuit; thereby protection automotive occupant or instrument and equipment, so crash sensor has widespread demand in systems such as automobile, communication, aerospace, automatic detection instrument.
In the existing crash sensor technology, most of mode that adopts the magnet absorption Metal Ball relies on permanent magnet to be used for making the contact to keep off-state to the adhesive of soft magnetic metal ball, and the inertial force when the collision generation is during greater than the suction-combining force of magnet, soft magnetic metal club hits mechanical contact, turning circuit.Yet, cause contact weak point duration of contact or contact to contact unsettled phenomenon easily owing to the elastic restoring force or the impact contact force of sensor construction in the collision process makes the contact be difficult to stable contact.Crash sensor described in patent CN01268160, this sensor mainly rely on the adsorbed steel-ball collision contact of magnet to come turning circuit, and resilience takes place easily, can not make the contact keep stablizing contact condition.And for example the sensor described in the patent CN1852815A mainly utilizes the electromagnetic eddy effect to respond to the changes of magnetic field that collision causes, and then calculates collision strength by CPU.This sensor is ability operate as normal under the situation of extraneous continued power only, and as easy as rolling off a logly in collision process its electric power system is affected and can't accurately responds to, both increase the structural complexity of sensor, increased energy consumption, reduced the antijamming capability of sensor again.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of magneto crash sensor is provided,, keep stable after the contact of contact, strengthen antijamming capability and cut down the consumption of energy to realize accurate detection to collision strength.
For achieving the above object, magneto crash sensor of the present invention comprises: mass, shell, fixedly magnetic patch and fixed contact is characterized in that, fixed contact is made up of left fixed contact and right fixed contact, is arranged on the below of moving contact and is connected with shell; Be fixed with moving magnetic patch and moving contact on the mass, mass is connected with shell by flexible beam; Fixedly magnetic patch is arranged on the lower right of moving magnetic patch and is connected with shell; When the inertial force of external world's collision generation reached the dangerous threshold value of setting, mass drove moving contact and contacts rapidly with right fixed contact with left fixed contact respectively.
Described moving magnetic patch is fixed on the right side of mass, and moving contact is fixed on the mass bottom, and mass vertically moves.
Described flexible beam is made up of upper strata flexible beam and lower floor's flexible beam, and an end is fixed on the shell, and the other end is connected with mass, forms cantilever beam structure.
Described shell is an insulating material, the inner damping material of filling, and fixedly magnetic patch is connected the inner right side of this shell, and fixed contact is connected the interior below of shell.
Described moving magnetic patch and fixedly be provided with the gap between the magnetic patch on vertical direction and horizontal direction, mass be vertically in the motion process, moving magnetic patch and fixedly the vertical range between the magnetic patch remain unchanged.
When described moving contact contacted fixed contact, moving contact was as connecting bridge, the external circuit that conducting left side fixed contact is connected with right fixed contact.
The present invention compared with prior art has following advantage:
1) the present invention is owing to be fixed in flexible beam one end on the shell, the other end is connected with mass, form cantilever beam structure, thereby when the inertial force of extraneous collision generation reaches dangerous threshold value, can be by the vertical movement of cantilever structure, the moving contact that drives on the mass contacts with fixed contact rapidly, and the external circuit that the conducting fixed contact is connected is realized the accurate detection of collision strength.
2) the present invention since fixedly the magnetic patch lower right that is arranged on moving magnetic patch form the permanent magnetism unitized construction, need not extraneous energy supply after the permanent magnetism the suction-combining force that produces by the permanent magnetism unitized construction makes moving contact and fixed contact contact stablizes with regard to keeping, improved the antijamming capability of sensor effectively, solved contact back, contact and kept problem stable and that cut down the consumption of energy.
3) the present invention can be according to the difference of extraneous collision strength, by fixedly magnetic patch and the moving magnetic patch of selecting different electromagnetic performances, and the flexible beam of different elasticity coefficient, can satisfy the request for utilization of different application occasion.
4) crash sensor of the present invention comprises that number of parts is few, and is simple in structure, is easy to assembling, is fit to produce in enormous quantities.
Description of drawings
Fig. 1 is the structural drawing that the present invention is in " opening " state;
Fig. 2 is the structural drawing that the present invention is in " pass " state.
Embodiment
Followingly structure of the present invention is described further with reference to accompanying drawing:
With reference to Fig. 1, the present invention includes: mass 1, flexible beam 2, shell 3, moving magnetic patch 4, fixedly magnetic patch 5, moving contact 6 and fixed contact 7.Wherein flexible beam 2 is double-deck flexible beam, is made up of upper strata flexible beam 2a and the flexible beam 2b of lower floor; Shell 3 is the common construction material with insulating property (properties), as rubber, and organic glass, TPEE etc., the inner damping material of filling; Moving contact 6 and fixed contact 7 are made by the alloy material with electric conductivity, as copper, and aluminium, gold etc.; Fixed contact 7 is made up of left fixed contact 7a and right fixed contact 7b.
Upper strata flexible beam 2a and lower floor's flexible beam 2b one end are fixed on the shell 3, the other end is connected with mass 1, form cantilever beam structure, when the inertial force of external world's collision generation reached the dangerous threshold value of setting, upper strata flexible beam 2a and the flexible beam 2b of lower floor occured bending and deformation; Mass 1 is subjected to inertial force and does the time spent and vertically move, and moving magnetic patch 4 is fixed on the right side of mass 1, and moving contact 6 is fixed on the bottom of mass 1; Fixedly magnetic patch 5 is arranged on the bottom right of moving magnetic patch 4, and be connected the inner right side of shell 3, fixedly on vertical direction and horizontal direction, be provided with the gap between magnetic patch 5 and the moving magnetic patch 4, mass 1 is vertically in the motion process, fixedly the vertical range between magnetic patch 5 and the moving magnetic patch 4 remains unchanged, and forms the permanent magnetism unitized construction; Left side fixed contact 7a and right fixed contact 7b are located at the below of moving contact 6, and be connected the interior below of shell 3, when moving contact 6 contacts with right fixed contact 7b with left fixed contact 7a under the drive of mass 1, moving contact 6 is as connecting bridge, the external circuit that conducting left side fixed contact 7a is connected with right fixed contact 7b is formed the bridge contact structure.
By the supporting role of upper strata beam 2a and the beam 2b of lower floor, moving contact 6 keeps off-state with left fixed contact 7a and right fixed contact 7b, makes the present invention be in " opening " state.
When the inertial force of external world's collision generation reaches the dangerous threshold value of setting, upper strata flexible beam 2a and the flexible beam 2b of lower floor occur bending and deformation, mass 1 is used as vertical motion because of inertial force, driving moving contact 6 contacts rapidly with right fixed contact 7b with left fixed contact 7a respectively, this moment, moving contact 6 was as connecting bridge, the external circuit that conducting left side fixed contact 7a is connected with right fixed contact 7b, and rely on moving magnetic patch 4 and fixedly the permanent magnetism the suction-combining force effect between the magnetic patch 5 keep in touch stable, make the present invention be in " pass " state, as shown in Figure 2.
Claims (7)
1. magneto crash sensor, comprise: mass (1), shell (3), fixedly magnetic patch (5) and fixed contact (7), it is characterized in that, fixed contact (7) is made up of left fixed contact (7a) and right fixed contact (7b), is arranged on the below of moving contact (6) and is connected with shell (3); Be fixed with moving magnetic patch (4) and moving contact (6) on the mass (1), mass (1) is connected with shell (3) by flexible beam (2); Fixedly magnetic patch (5) is arranged on the lower right of moving magnetic patch (4) and is connected with shell (3), forms the permanent magnetism unitized construction; When the inertial force of external world's collision generation reached the dangerous threshold value of setting, mass (1) drove moving contact (6) and contacts rapidly with right fixed contact (7b) with left fixed contact (7a) respectively.
2. magneto crash sensor according to claim 1 is characterized in that: moving magnetic patch (4) is fixed on the right side of mass (1), and moving contact (6) is fixed on mass (1) bottom, and mass (1) vertically moves.
3. magneto crash sensor according to claim 1, it is characterized in that: flexible beam (2) is made up of upper strata flexible beam (2a) and lower floor's flexible beam (2b), one end is fixed on the shell (3), and the other end is connected with mass (1), forms cantilever beam structure.
4. magneto crash sensor according to claim 1 is characterized in that: shell (3) is an insulating material, the inner damping material of filling.
5. according to claim 1 or 4 described magneto crash sensors, it is characterized in that: fixedly magnetic patch (5) is connected the inner right side of shell (3), and fixed contact (7) is connected the interior below of shell (3).
6. magneto crash sensor according to claim 1, it is characterized in that: move magnetic patch (4) and fixedly on vertical direction and horizontal direction, be provided with the gap between the magnetic patch (5), mass (1) is vertically in the motion process, moving magnetic patch (4) and fixedly the vertical range between the magnetic patch (5) remain unchanged.
7. magneto crash sensor according to claim 1 is characterized in that: during moving contact (6) contact fixed contact (7), moving contact (6) is as connecting bridge, the external circuit that conducting left side fixed contact (7a) is connected with right fixed contact (7b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120074504XU CN201984083U (en) | 2011-03-22 | 2011-03-22 | Permanent-magnet type collision sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120074504XU CN201984083U (en) | 2011-03-22 | 2011-03-22 | Permanent-magnet type collision sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201984083U true CN201984083U (en) | 2011-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120074504XU Expired - Fee Related CN201984083U (en) | 2011-03-22 | 2011-03-22 | Permanent-magnet type collision sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201984083U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157298A (en) * | 2011-03-22 | 2011-08-17 | 西安电子科技大学 | Permanent magnetic collision sensor |
-
2011
- 2011-03-22 CN CN201120074504XU patent/CN201984083U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157298A (en) * | 2011-03-22 | 2011-08-17 | 西安电子科技大学 | Permanent magnetic collision sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20170322 |
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| CF01 | Termination of patent right due to non-payment of annual fee |