CN201242976Y - Magnetic collision sensor - Google Patents
Magnetic collision sensor Download PDFInfo
- Publication number
- CN201242976Y CN201242976Y CNU2008201249755U CN200820124975U CN201242976Y CN 201242976 Y CN201242976 Y CN 201242976Y CN U2008201249755 U CNU2008201249755 U CN U2008201249755U CN 200820124975 U CN200820124975 U CN 200820124975U CN 201242976 Y CN201242976 Y CN 201242976Y
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- China
- Prior art keywords
- permanent magnet
- magnetic
- sheet metal
- box body
- spring
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a magnetic type collision sensor, which comprises a box body and a metal sheet pair, and also includes a permanent magnet and a spring; wherein, the metal sheet pair is positioned in the box body; the permanent magnet and the spring are positioned in the box body; the permanent magnet can move between a first location far away from the metal sheet pair and a second location near the metal sheet pair in the box body; when the permanent magnet is pressed in inclined mode to the first location by the spring, first tail ends of the metal sheet pair are separated; and when the permanent magnet is in the second location, the first tail ends of the metal sheet pair are mutually contacted under the magnetic effect of the permanent magnet. The magnetic type collision sensor has the advantages of simple structure, small and exquisite volume, reliable performance and cheap production cost; and the magnetic type collision sensor can select different types of sensors according to different types of cars, can be repeatedly used under certain conditions, and transmits accurate information to ECU to control airbag detonation.
Description
Technical field
The utility model relates to sensor field, relates in particular to a kind of magnetic-type crash sensor that is used for the Control of Automobile air bag.
Background technology
Along with The development in society and economy, and the improving constantly of people's living standard, the recoverable amount of automobile constantly rises, and has become to produce and the vehicles that life can't be left.Owing to unavoidably traffic accident can take place, threaten driver, occupant and pedestrian's life security, thereby the safety problem of automobile cause increasing attention in the driving procedure of automobile.When collision happens, judge the power of collision exactly, determine when should firing safety air-bag when needn't firing safety air-bag, firing safety air-bag causes waste when unnecessary to avoid, cause the occupant to come to harm, and in the time must igniting firing safety air-bag generation tragedy not.
In the prior art, the transducer of control air bag mostly is contact greatly, inertia-type crash sensor described in patent No. CN01268160, comprise steel ball, magnet and contact spring, under normal circumstances, steel ball is adsorbed on the magnet under the effect of magnet, when bumping, if the inertia force that is subjected to of steel ball greater than the magnetic force of magnet then steel ball can break away from constraint machinery contact short when hitting contact spring, and then control system is ignited air bag according to the state of transducer.Yet this transducer is a touch sensor, mechanical type collision reliability is not high, is not easy to regulate the magnetic force size, the relation between suffered inertia force of uncontrollable steel ball and magnetic force, thereby be easy to generate this quick-fried or should not be quick-fried but ignite situation of air bag, the life security that jeopardizes the occupant.Simultaneously, this sensor bulk is bigger, and complex structure produce and encapsulate the environmental requirement height, thereby cost is higher.
The utility model content
Therefore, the purpose of this utility model provides the magnetic-type crash sensor that air bag is controlled in a kind of contactless can be used for.Simple and the reliable operation of this sensor construction.
For realizing the purpose of this utility model, the utility model provides a kind of magnetic-type crash sensor, described transducer comprises that box body is right with the sheet metal that is positioned at box body, the first right end of described sheet metal can be in contact with one another or separate, second end is connected with external circuit respectively by pin, described transducer also comprises permanent magnet and the spring that is positioned at described box body, described permanent magnet can be in described box body moves between the right second place in the primary importance right away from described sheet metal with near described sheet metal, described spring with described permanent magnet to described primary importance bias voltage, when described permanent magnet is in described primary importance, right first terminal separated from one another of described sheet metal, when described permanent magnet was in the described second place, the first right end of described sheet metal contacted with each other under the magneticaction of described permanent magnet.
The magnetic-type crash sensor that provides according to the utility model, owing to sheet metal contacts being adsorbed by permanent magnet, can be erected at position on the spring and sheet metal by pretightning force, the permanent magnet of regulating spring to controlling the relation between inertia force and spring force in the position in the box body, thereby accurately control the ignition opportunity of air bag.This sensor technology advanced person, structure and dependable performance have reached the purpose of the accurate firing safety air-bag of noncontact.In addition, because magnetic-type crash sensor processing of the present utility model is convenient, simple in structure, assemble easily, volume is small and exquisite, and adopts fluid sealant sealing commonly used, so makes production cost lower.Simultaneously, magnetic-type crash sensor of the present utility model is not subjected to the restriction of vehicle and the restriction of environment, and certain condition is also reusable down.
Description of drawings
Fig. 1 is the cutaway view according to magnetic-type crash sensor of the present utility model;
Fig. 2 is the face upwarding view according to magnetic-type crash sensor of the present utility model.
Embodiment
To and come in conjunction with the accompanying drawings the utility model is elaborated by embodiment below.
Fig. 1, Fig. 2 are respectively according to the cutaway view of magnetic-type crash sensor of the present utility model and birds-eye perspective.
A kind of execution mode according to magnetic-type crash sensor of the present utility model, described transducer comprises box body 1 and is positioned at the sheet metal of box body 1 to 6, described sheet metal can be in contact with one another or separate 6 first end, the second terminal pin 7 that passes through is connected with external circuit respectively, described transducer also comprises permanent magnet 2 and the spring 3 that is positioned at described box body 1, described permanent magnet 2 can be in described box body 1 moving between to 6 the second place to 6 primary importance with near described sheet metal away from described sheet metal, described spring 3 with described permanent magnet 2 to described primary importance bias voltage, when described permanent magnet 2 is in described primary importance, described sheet metal is separated from one another to 6 first end, when described permanent magnet 2 was in the described second place, described sheet metal contacted with each other to 6 first end under magneticaction.
Described permanent magnet 2 residing described primary importances be permanent magnet 2 away from sheet metal to 6, make sheet metal not be subjected to magneticaction to be in the position range of released state to 6, the described permanent magnet 2 residing described second places be permanent magnet 2 near sheet metal to 6, make sheet metal be subjected to magneticaction and the position range that contacts with each other to 6.
In addition, described box body 1 can comprise upper plenum 11, central dividing plate 12 and following cavity 13, described permanent magnet 2 is arranged in the described upper plenum 11, described sheet metal is arranged in the described cavity 13 down 6, each parts that are arranged as this transducer have like this been created good working environment, and structure is more reasonable.
Described box body 1 can be by engineering material such as rubber commonly used, TPEE, and PBT, POM etc. are injection molded, are roughly the rectangle column.Preferably, described upper plenum inner surface cross section is circular, and upper plenum 11 forms a ladder structure, and the top diameter of upper plenum 11 is greater than the lower diameter of upper plenum 11, and the sidewall of upper plenum 11 requires smoothness higher; There is a groove structure in the central authorities of central dividing plate 12; Following cavity 13 is similarly a ladder structure, and the base diameter of following cavity 13 is greater than the upper diameter of following cavity 13.
According to a kind of execution mode, described transducer can also comprise the axis of guide 4 that is fixed in the described upper plenum 11, described permanent magnet 2 is set on the described axis of guide 4 and can moves along the described axis of guide 4, thereby can provide guide effect for permanent magnet 2 mobile, makes the mobile smooth-going of permanent magnet 2.
The described axis of guide 4 also can be by engineering material such as rubber commonly used, TPEE, and PBT, POM etc. are injection molded.Preferably, this axis of guide 4 is a T type structure, make the yi word pattern structure and the box body 1 upper plenum 11 top interference fit at its top like this, the yi word pattern structure just in time is stuck on the hierarchic structure in box body 1 upper plenum 11, the bottom of the axis of guide 4 is a rod shaped structure, the bottom of bar has projection groove structure lucky and in box body 1 central dividing plate 12 to match, and can more accurately locate the described axis of guide 4 securely.
According to a kind of execution mode, described spring 3 can be set on the described axis of guide 4, and is compressed between described permanent magnet 2 and the described central dividing plate 12.Described spring 3 surfaces are through stainless treatment, and its slightly larger in diameter is in the diameter of the bar structure of the axis of guide 4, and are wrapped on the bar structure of the axis of guide 4, can be along the axial tension and the compression of the bar structure of the axis of guide, and the pretightning force of spring 3 can be regulated.
In addition, described spring 3 also can be set directly between described permanent magnet 2 and the described central dividing plate 12, perhaps is arranged between box body 1 and the permanent magnet 2.
Like this, can provide elastic force, with permanent magnet 2 bias voltages or be pulled to described primary importance for permanent magnet 2.
Described permanent magnet 2 can be fired by magnetic powder material die casting and form, the processing of also will magnetizing afterwards.Preferably, this permanent magnet 2 can be cylinder ring shape, its shape conforms to described upper plenum inner surface configuration, and its top annulus bore dia forms a shoulder structure less than annulus hole, bottom, this structure cooperates with spring 3, just be stuck on the top of spring 3, make the spring 3 can be with permanent magnet 2 jack-up, upper plenum 11 internal diameters of the overall diameter of this permanent magnet 2 and box body 1 be matched in clearance, its outer surface is smooth as far as possible, to reduce friction.
Described sheet metal to 6 usually by commonly used as can being constituted of conductions such as iron, nickel by the material that magnet adsorbs, it is a pair of that two sheet metals constitute, two sheet metals separate up and down under nature, and are overlapping but be not in contact with one another about some.
According to a kind of execution mode, described transducer can also comprise the vacuum tube 5 that is arranged in the described cavity 13 down, and described sheet metal is arranged in the described vacuum tube 56, can prevent that sheet metal is to 6 oxidation corrosions.
The two ends of described vacuum tube 5 are respectively drawn one respectively by copper, and each sheet metal different with one of the opposite end of 7, two pins 7 of pin that aluminium, stainless steel etc. are made links to each other, and the other end of two pins 7 is drawn outside the box body 1 and linked to each other with interlock circuit.
Described sheet metal is an end that can be in contact with one another to 6 first end, and second end is the other end that links to each other with pin 7.
According to a kind of execution mode, described transducer also comprises fluid sealant 8, and the whole described cavity 13 down of described fluid sealant 8 sealings is with fixing described vacuum tube 5.In addition, T type one word of the axis of guide 4 top is above in the upper plenum can seal with top cover, fluid sealant or other modes, is isolated from the outside so that be arranged on the motion cavity of the permanent magnet 2 in the upper plenum, dustproof, moistureproof, assurance permanent magnet 2, spring 3 operate as normal.
When the normal smooth-ride of vehicle or when static, acceleration is zero, permanent magnet 2 in the magnetic-type crash sensor of the present utility model is identical with the relative velocity of vehicle at this moment, be that relative acceleration is zero, the inertia force that permanent magnet is subjected to is zero, it makes a concerted effort to be provided separately by the elastic force of spring 3, permanent magnet 2 is biased in primary importance by spring 3, the magnetic field range of permanent magnet 2 can't reach the sheet metal that is positioned at 1 time cavity of box body to 6 position, that is to say that sheet metal is not subjected to magneticaction to 6, keep nature, its first end does not contact mutually, be low level signal with detected in the circuit that pin 7 links to each other, the signal message of the comprehensive a plurality of transducers of safety airbag ECU is made the whether decision of firing safety air-bag.
When vehicle launch, when normally quickening, produce certain acceleration, the permanent magnet 2 in the magnetic-type crash sensor of the present utility model is subjected to certain inertia force at this moment.When the direction of the elastic force that starts the spring 3 that the inertia force that is subjected to when quickening and permanent magnet 2 be subjected to consistent, what permanent magnet 2 was subjected to is biased in primary importance with permanent magnet 2 with joint efforts, the magnetic field range of permanent magnet 2 can't reach sheet metal in the following cavity to 6 position, the sheet metal of cavity vacuum pipe 5 kept natures to 6 under be arranged in this moment, and first end of two sheet metals is not in contact with one another.Still for opening circuit, detected signal still is a low level signal to the circuit that links to each other with pin 7.The signal of the comprehensive a plurality of transducers of ECU of control air bag is made the whether decision of firing safety air-bag.
When vehicle brake, produce the bigger acceleration that subtracts, permanent magnet 2 in the magnetic-type crash sensor of the present utility model is subjected to bigger inertia force at this moment, the direction of this inertia force is opposite with the elastic force direction of spring 3, by setting in advance the elastic force size of spring, make that the inertia force size is unlikely to offset elastic force, thereby the direction of making a concerted effort at this moment remains the direction of spring 3 elastic force, permanent magnet 2 still is spring-biased against primary importance, sheet metal is not subjected to magneticaction to 6, and its first end is not in contact with one another, the electric circuit inspection that links to each other with pin 7 to be still low level signal, signal is passed to the ECU of control air bag, makes the whether judgement of firing safety air-bag.
When vehicle brake more rapidly, but when being not the instantaneous strong deceleration when bumping, it is very big to subtract acceleration, from being that deceleration time of zero is longer at interval at a high speed to speed, this moment the permanent magnet 2 in the magnetic-type crash sensor of the present utility model to be subjected to inertia force very big, this inertia force is opposite with the elastic force direction of spring 3, the size of inertia force may be greater than the size of elastic force, the resultant direction that makes permanent magnet 2 be subjected to is pointed to the following cavity of box body 1, permanent magnet 2 against the elastic force of spring 3 to the second place, but do not move to can make sheet metal to 6 be subjected to the magnetic force scope time since the variation that subtracts acceleration be tending towards slowing down, the inertia force that the elastic force of spring 3 is subjected to greater than permanent magnet 2 again, like this, permanent magnet 2 is biased in primary importance by spring 3 again.In this process, sheet metal is to 6 magnetic force that are not subjected to permanent magnet 2 all the time, and first end of two sheet metals is not in contact with one another, and does not produce step signal in the circuit that pin 7 is inserted, and still is low level signal.
When vehicle meets accident collision, vehicle is instantaneous to become inactive state by transport condition, it is very big to subtract acceleration, permanent magnet 2 in the magnetic-type crash sensor of the present utility model is subjected to very big inertia force at this moment, the direction of this inertia force is opposite with the elastic force of spring 3, size is bigger than elastic force, thereby the resultant direction that permanent magnet 2 is subjected to is identical with the inertia force direction, and permanent magnet 2 moves to the second place.When permanent magnet 2 moves to its magnetic field range can have influence on sheet metal to 6 position the time, sheet metal is subjected to magneticaction to 6, two are in contact with one another up and down, the circuit that conducting pin 7 is connected, produce the step signal of a high level, the ECU of control air bag receives this signal, and the signal of comprehensive a plurality of transducers is made the whether decision of firing safety air-bag.
When vehicle be subjected to bumping static then after, the inertia force that permanent magnet 2 is subjected to reduces to disappear gradually, permanent magnet 2 returns to primary importance under the effect of spring 3 elastic force, sheet metal no longer is subjected to magneticaction to 6 and recovers the nature separated position, thereby magnetic-type crash sensor of the present utility model can reuse.
In magnetic-type crash sensor of the present utility model, can select the different permanent magnet of magnetic force 2 by different needs according to different vehicles, the spring 3 different with coefficient of elasticity also can be provided with the distance of 6 of two different sheet metals, reaches identical purpose.
Claims (8)
1. magnetic-type crash sensor, the sheet metal that described transducer comprises box body (1) and is positioned at box body (1) is to (6), described sheet metal can be in contact with one another or separate first end of (6), the second terminal pin (7) that passes through is connected with external circuit respectively, it is characterized in that: described transducer also comprises permanent magnet (2) and the spring (3) that is positioned at described box body (1), described permanent magnet (2) can move between to the second place of (6) to the primary importance of (6) with near described sheet metal away from described sheet metal in that described box body (1) is inherent, described spring (3) with described permanent magnet (2) to described primary importance bias voltage, when described permanent magnet (2) when being in described primary importance, described sheet metal is separated from one another to described first end of (6), when described permanent magnet (2) when being in the described second place, described sheet metal contacts with each other to described first end of (6) under the magneticaction of described permanent magnet (2).
2. magnetic-type crash sensor according to claim 1, it is characterized in that, described box body (1) comprises upper plenum (11), central dividing plate (12) and following cavity (13), described permanent magnet (2) is arranged in the described upper plenum (11), and described sheet metal is arranged in the described cavity (13) down (6).
3. magnetic-type crash sensor according to claim 2, it is characterized in that, described transducer also comprises the axis of guide (4) that is fixed in the described upper plenum (11), and described permanent magnet (2) is set in the described axis of guide (4) and goes up and can move along the described axis of guide (4).
4. magnetic-type crash sensor according to claim 3 is characterized in that, described permanent magnet (2) is the annulus cylindricality.
5. magnetic-type crash sensor according to claim 3 is characterized in that, described spring (3) is set on the described axis of guide (4), and is compressed between described permanent magnet (2) and the described central dividing plate (12).
6. according to claim 3 or 5 described magnetic-type crash sensors, it is characterized in that the described axis of guide (4) is the T font structure.
7. magnetic-type crash sensor according to claim 2 is characterized in that, described transducer also comprises the vacuum tube (5) that is arranged in the described cavity (13) down, and described sheet metal is arranged in the described vacuum tube (5) (6).
8. magnetic-type crash sensor according to claim 7 is characterized in that, described transducer also comprises fluid sealant (8), and the whole described cavity (13) down of sealing glue (8) sealing is with fixing described vacuum tube (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201249755U CN201242976Y (en) | 2008-07-31 | 2008-07-31 | Magnetic collision sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201249755U CN201242976Y (en) | 2008-07-31 | 2008-07-31 | Magnetic collision sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201242976Y true CN201242976Y (en) | 2009-05-20 |
Family
ID=40716267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201249755U Expired - Lifetime CN201242976Y (en) | 2008-07-31 | 2008-07-31 | Magnetic collision sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201242976Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018112828A1 (en) * | 2016-12-22 | 2018-06-28 | Hamlin Electronics (Suzhou) Co. Ltd | Magnetic position sensor |
| CN110074732A (en) * | 2019-05-28 | 2019-08-02 | 东莞市智科智能科技有限公司 | A kind of collision steering structure of sweeping robot |
| CN111688493A (en) * | 2020-05-29 | 2020-09-22 | 宁波峰梅新能源汽车科技有限公司 | Electric automobile collision sensor |
-
2008
- 2008-07-31 CN CNU2008201249755U patent/CN201242976Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018112828A1 (en) * | 2016-12-22 | 2018-06-28 | Hamlin Electronics (Suzhou) Co. Ltd | Magnetic position sensor |
| CN110573829A (en) * | 2016-12-22 | 2019-12-13 | 哈姆林电子(苏州)有限公司 | Magnetic position sensor |
| CN110074732A (en) * | 2019-05-28 | 2019-08-02 | 东莞市智科智能科技有限公司 | A kind of collision steering structure of sweeping robot |
| CN111688493A (en) * | 2020-05-29 | 2020-09-22 | 宁波峰梅新能源汽车科技有限公司 | Electric automobile collision sensor |
| CN111688493B (en) * | 2020-05-29 | 2024-01-23 | 宁波峰梅新能源汽车科技有限公司 | Electric automobile collision sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090520 |