CN102568923A - Dual-threshold three-stable-state collision sensor - Google Patents
Dual-threshold three-stable-state collision sensor Download PDFInfo
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- CN102568923A CN102568923A CN2011104592531A CN201110459253A CN102568923A CN 102568923 A CN102568923 A CN 102568923A CN 2011104592531 A CN2011104592531 A CN 2011104592531A CN 201110459253 A CN201110459253 A CN 201110459253A CN 102568923 A CN102568923 A CN 102568923A
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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
A kind of dual threshold three-stable state crash sensor belongs to the accurate micro-electro-mechanical systems crash sensor technology field that unifies, and can be used for collision safety protection system, Aero-Space control system, armament systems, instrument fall protection and patient and falls down monitor system etc.
Background technology
Crash sensor can be responded to impact strength exactly; And judge the risk of collision degree according to pre-set threshold; For protecting control system that reliable decision information is provided fully, be with a wide range of applications in armament systems, Aero-Space, Vehicle security system and civilian consumer electronics field.
Key sensor spare as safety control system; Crash sensor not only needs rapid and precise assessment collision course and degree of danger; And connection safety protective circuit; Also will consider the influence of disturbing factor in the applied environment, this has just limited some application of sensor based on the development of multiple physical field effect, like magnetic field formula and Electric field transducer energy consumption problem and anti-interference problem.At present the function of crash sensor mainly concentrates on the unidirectional collision sensing of single threshold, is difficult to judge twice above continuous collision or impact strength is judged etc.And the electronic type crash sensor mainly relies on accelerometer to respond to collision; Need complicated test circuit and signal processing circuit simultaneously; This has not only increased the cost of sensor measuring system; Also be limited by operating accuracy and environmental interference influence of accelerometer etc., had a strong impact on the response speed and the reliability of safety system.Comprehensive investigation finds that the threshold value induction number and the antijamming capability of crash sensor are the key factors that limits its performance boost.
Therefore; Adopt non-linear pure mechanical structure to realize the inducing function of in the same way a plurality of or incorgruous collision threshold value; Be to improve the precision of sensing system and the important channel of reliability; Both can satisfy the application demand of multilevel security protection system, can avoid the interference and the energy consumption problem of external electromagnetic field again.
Summary of the invention
In order to satisfy the application demand of modern collision multilevel security protection system for many threshold values, multi-direction and low energy consumption crash sensor; The invention provides a kind of dual threshold three-stable state crash sensor; Belong to the accurate micro-electro-mechanical systems crash sensor technology field that unifies, can be used for collision safety protection system, Aero-Space control system, armament systems, instrument fall protection and patient and fall down monitor system etc.
Technical scheme of the present invention is: a kind of dual threshold three-stable state crash sensor mainly comprises mass, parallel girder, fixed block first contact and second contact; Said mass comprises an outer mass and interior mass; Adopt parallel girder to be connected outer mass, interior mass with fixed block; Nested double-deck parallel girder supporting construction inside and outside the formation, first parallel girder is connected the inboard of outer mass and the outside of interior mass with second parallel girder, the inboard of mass and the outside that is positioned at the fixed block top side rail in the 3rd parallel girder is connected with Siping City's cross girders; The two ends of curb girder are connected with fixed block; Form the left-right symmetric structure, said first contact is positioned at the outside of mass vertical direction, and said second contact is positioned at the outer mass outside vertically; When interior mass vertically moves, when interior mass contacted with first contact, first parallel girder and second parallel girder deformed, and crash sensor is positioned at second stable state; When interior mass position remains unchanged, outer mass vertically moves, and when outer mass contacted with second contact, the 3rd parallel girder and Siping City's cross girders deformed, and crash sensor is positioned at three-stable state.
The outside of mass and outer mass the same side in said first contact and second contact lay respectively at.
The outside of mass and outer mass opposition side in said first contact and second contact lay respectively at.
The inboard of said outer mass all is provided with the fixedly curb girder of usefulness of the parallel fine strain of millet of confession with the interior mass inboard and the outside.
Said outer mass and interior mass adopt square hollow structure, and the width of both sides is greater than the width of top and the bottom.
The metallic conduction material is adopted in said outer mass, interior mass, first contact and second contact.
The operating characteristic of installing among the present invention is that this crash sensor need not processor and drive unit can be judged the impact strength grade rapidly, sends control signal.When extraneous impact strength was lower than the first dangerous threshold value, bending deformation did not take place in the parallel girder structure, and inside and outside mass keeps original position, and transducer is in first stable state; When extraneous impact strength surpasses the first dangerous threshold value and during less than the second dangerous threshold value; The 3rd parallel girder and Siping City's cross girders structure generation bending deformation; Interior mass contacts with first contact rapidly, first parallel girder and second parallel girder shape that remains unchanged, and this mechanism is in second stable state; When extraneous impact strength surpassed the second dangerous threshold value, bending deformation took place in four groups of parallel girders simultaneously, and made outer mass contact first contact and second contact rapidly, and remain in this state simultaneously with interior mass, and this moment, mechanism was in three-stable state; When recurring secondary collision; I.e. collision for the first time is greater than colliding greater than the second dangerous threshold value the first dangerous threshold value, the second time; This moment, first parallel girder and second parallel girder at first were out of shape; Interior mass contacts first contact, and outer then mass contacts second contact, realizes the inducing function of continuous crash type.
The present invention compared with prior art has following advantage:
1. the non-linear three-stable state characteristic of nested double-deck inclination support beam structure realized the inducing function of binary collision intensity threshold inside and outside the present invention adopted; Compare with traditional wire elastic construction transducer, have the advantage that the threshold value induction precision is high, dual threshold is responded to, energy consumption is low and reliability is high.
2. the present invention is for relying on the power-actuated mechanical device of extraneous inertia; Can effectively resist electromagnetic interference; And the crash sensor impulse stroke is big, and various to external world frequency acceleration signals have mechanical recognition function, the elimination High-frequency Interference; Improve the action accuracy of transducer under various adverse circumstances (electromagnetic interference, thunderstorm and vibration interference etc.), be applicable to multiple civil and military occasion.
3. the present invention adopts planar structure, and all structure divisions except that the contact are fit to integrated processing, and are with low cost, is convenient to produce in batches.
Description of drawings
Fig. 1 is 1 one kinds of dual threshold three-stable states of embodiment crash sensor structure chart.
Fig. 2 is 1 one kinds of dual threshold three-stable states of embodiment crash sensor, second stable position.
Fig. 3 is 1 one kinds of dual threshold three-stable states of embodiment crash sensor three-stable state position.
Fig. 4 is first stable position of 2 one kinds of dual threshold three-stable states of embodiment crash sensor.
Fig. 5 is second stable position of 2 one kinds of dual threshold three-stable states of embodiment crash sensor.
Fig. 6 is the three-stable state position of 2 one kinds of dual threshold three-stable states of embodiment crash sensor.
Fig. 7 is 3 one kinds of dual threshold three-stable states of embodiment crash sensor structure chart.
Among the figure, 1, outer mass, 2, interior mass, 3, fixed block, 4, first parallel girder; 5, the second parallel girders, the 6, the 3rd parallel girder, 7, Siping City's cross girders, 8, first curb girder, 8a, second curb girder; 8b, the 3rd curb girder, 8c, the 4th curb girder, 8d, the 5th curb girder, 8e, the 6th curb girder, 8f, heptalateral beam, 8j, the 8th curb girder, 9, first contact; 9a, second contact, 9b, the 3rd contact, the 10, the 5th parallel girder, the 11, the 6th parallel girder.
Embodiment
Fig. 1 illustrates a kind of structure chart of dual threshold three-stable state crash sensor.Among the figure, a kind of dual threshold three-stable state crash sensor comprises: outer mass 1, interior mass 2, fixed block 3, first parallel girder 4, second parallel girder 5, the 3rd parallel girder 6 and Siping City's cross girders 7, first contact 9 and the second contact 9a.The two ends of first curb girder 8 and the second curb girder 8a are connected on the fixed block 3.The 3rd parallel girder 6 and Siping City's cross girders 7 are connected in interior mass 2 on the fixed block 3, form supporting construction; The inboard of the outside of mass 2 and outer mass 1 in the two ends of first parallel girder 4 and second parallel girder 5 are connected respectively.Between mass 2 and the outer mass 1, the second contact 9a was fixed in the outside of outer mass in first contact 9 was fixed in.
When not colliding, four groups of parallel girders support outer mass 1 and remain in original position with interior mass 2, and crash sensor is in first stable state.
The antijamming capability of crash sensor mainly is embodied in; The impact strength that receives when transducer is during less than the first dangerous threshold value or other vibration interference; Near the only microvibration first stable position of outer mass 1 and interior mass 2, state exchange can not take place in transducer, keeps off-state between first contact 9, the second contact 9a and interior mass 2 and the outer mass 1; Therefore, transducer has certain anti-interference capability.Because mechanism is pure mechanical structure, do not receive the interference of external electromagnetic field simultaneously.
Shown in Figure 2; When extraneous impact strength greater than the first dangerous threshold value during less than the second dangerous threshold value; Under the effect of extraneous impact force, bending deformation takes place in the 3rd parallel girder 6 and Siping City's cross girders 7, relies on the stable state redirect phenomenon of mechanism; Interior mass 2 with first contact 9 contacts rapidly, and remain in this state.Simultaneously, outer mass 1 is along with interior mass 2 translations, because the amplitude of external force surpasses flexion limit and the phenomenon that do not deform of first parallel girder 4 and second parallel girder 5, do not reach the position of the second contact 9a, and structure is in second stable position at this moment;
Shown in Figure 3; When extraneous impact strength during greater than the second dangerous threshold value; Interior mass 2 is enough to make four groups of parallel girders that bending deformation takes place simultaneously with the inertia force that outer mass 1 produces, and the redirect phenomenon takes place, and mass 2 contacts with the second contact 9a with first contact 9 with outer mass 1 simultaneously in making; And stable the maintenance and this state, connect the circuit protection device that is connected.
Fig. 4,5,6 has provided the structure chart of another kind of dual threshold three-stable state crash sensor.Among the figure, on the basis of embodiment 1, adopt first parallel girder 4 and second parallel girder 5 in the 5th parallel girder 10 and the 6th parallel girder 11 alternate embodiments 1, contact 9b substitutes contact 9a, and places the top of outer mass.The angle of inclination sum of the 5th parallel girder and the 6th parallel girder equals 180 degree.The angle of inclination equal and opposite in direction of the angle of the 5th parallel girder 10 and the 6th parallel girder 11 and the 3rd parallel girder 6 and Siping City's cross girders 7, in the opposite direction.Fig. 5 and Fig. 6 have provided two other stable state of this execution mode.Such transducer can be responded to the collision accident of different threshold values on the different directions, and promptly outer collision is along the inducing function of different directions.
When outer collision surpassed the first dangerous threshold value, interior mass 2 contacted with first contact 9 rapidly.When collision surpassed the second dangerous threshold value outside rightabout, the 3rd parallel girder 6 and Siping City's cross girders 7 did not deform, and interior mass 1 maintenance is motionless.Bending deformation takes place in the 5th parallel girder 10 and the 6th parallel girder 11, and outer mass contacts with the 3rd contact 9b rapidly, and closed, realizes stable contact.
For continuous rightabout collision sensing; Mass 2 contacts rapidly with first contact 9 in the present invention at first, and when rightabout collision took place, the interior mass 2 and first contact 9 were broken off rapidly and returned to original position; Outer mass 1 contacts turning circuit with the 3rd contact 9b rapidly.
Fig. 7 has provided the structure chart of the third dual threshold three-stable state crash sensor.Among the figure; On the basis of embodiment 1 and embodiment 2; Adopt the 3rd curb girder 8b, the 4th curb girder 8c, the 5th curb girder 8d, the 6th curb girder 8e, heptalateral beam 8f and the 8th curb girder 8j to substitute original being rigidly connected as flexibly connecting; The inboard of mass 2 in the two ends of the 3rd curb girder 8b and the 4th curb girder 8c are connected; Mid portion connects an end of the 3rd parallel girder 6 and Siping City's cross girders 7, the outside of mass 2 in the two ends of the 6th curb girder 8e and the 5th curb girder 8d are connected, and mid portion connects an end of the 5th parallel girder 10 and the 6th parallel girder 11.Heptalateral beam 8f is connected the inboard of outer mass 1 with the two ends of the 8th curb girder 8j, mid portion connects the other end of the 5th parallel girder 10 and the 6th parallel girder 11.When this structure realizes the function of embodiment 2, the induction threshold value be can reduce significantly, falling patient protective survey and fall protection system etc. are applicable to.
Claims (6)
1. dual threshold three-stable state crash sensor; It mainly comprises mass, parallel girder, fixed block (3) first contacts (9) and second contact (9a); It is characterized in that: said mass comprises an outer mass (1) and interior mass (2); Adopt parallel girder to be connected outer mass (1), interior mass (2) with fixed block (3); Nested double-deck parallel girder supporting construction inside and outside the formation, first parallel girder (4) is connected the inboard of outer mass (1) and the outside of interior mass (2) with second parallel girder (5), the inboard of mass (2) and the outside that is positioned at fixed block (3) top side rail in the 3rd parallel girder (6) is connected with Siping City's cross girders (7); The two ends of curb girder are connected with fixed block (3); Form the left-right symmetric structure, said first contact (9) is positioned at the outside of mass (2) vertical direction, and said second contact (9a) is positioned at outer mass (1) outside vertically; When interior mass (2) vertically moves, interior mass (2) and first contact (9) are when contacting, and first parallel girder (4) and second parallel girder (5) deform, and crash sensor is positioned at second stable state; When interior mass (2) position remains unchanged, outer mass (1) vertically moves, and outer mass (1) and second contact (9a) are when contacting, and the 3rd parallel girder (6) and Siping City's cross girders (7) deform, and crash sensor is positioned at three-stable state.
2. a kind of dual threshold three-stable state crash sensor according to claim 1 is characterized in that: said first contact (9) and second contact (9a) lay respectively at the outside of interior mass (2) and outer mass (1) the same side.
3. a kind of dual threshold three-stable state crash sensor according to claim 1 is characterized in that: said first contact (9) and second contact (9a) lay respectively at the outside of interior mass (2) and outer mass (1) opposition side.
4. a kind of dual threshold three-stable state crash sensor according to claim 1 is characterized in that: the inboard of said outer mass (1) all is provided with the fixedly curb girder of usefulness of the parallel fine strain of millet of confession with interior mass (2) inboard and the outside.
5. a kind of dual threshold three-stable state crash sensor according to claim 1 is characterized in that: said outer mass (1) and interior mass (2) adopt square hollow structure, and the width of both sides is greater than the width of top and the bottom.
6. a kind of dual threshold three-stable state crash sensor according to claim 3 is characterized in that: the metallic conduction material is adopted in said outer mass (1), interior mass (2), first contact (9) and second contact (9a).
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| CN2011104592531A CN102568923A (en) | 2011-12-31 | 2011-12-31 | Dual-threshold three-stable-state collision sensor |
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Cited By (4)
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| CN104316724A (en) * | 2014-11-15 | 2015-01-28 | 卢润湖 | Four-steady-state crash sensor |
| CN104527474A (en) * | 2014-12-10 | 2015-04-22 | 大连理工大学 | Collision safety chair device with collision threshold induction function and operating method thereof |
| CN109767547A (en) * | 2017-11-10 | 2019-05-17 | 宋奇山 | Intelligent security guard cash box |
| US11892467B2 (en) | 2020-12-18 | 2024-02-06 | Analog Devices, Inc. | Accelerometer with translational motion of masses |
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| US11892467B2 (en) | 2020-12-18 | 2024-02-06 | Analog Devices, Inc. | Accelerometer with translational motion of masses |
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Application publication date: 20120711 |