CN102126478A - Position sensor - Google Patents
Position sensor Download PDFInfo
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- CN102126478A CN102126478A CN 201110054963 CN201110054963A CN102126478A CN 102126478 A CN102126478 A CN 102126478A CN 201110054963 CN201110054963 CN 201110054963 CN 201110054963 A CN201110054963 A CN 201110054963A CN 102126478 A CN102126478 A CN 102126478A
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- dry
- permanent magnet
- reed tube
- box body
- reed switch
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- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 10
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000012212 insulator Substances 0.000 abstract 1
- 230000005389 magnetism Effects 0.000 abstract 1
- 230000005284 excitation Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 206010010774 Constipation Diseases 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
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Abstract
The invention discloses a position sensor, which is used in a car air bag restraint system and comprises a movable contact, wherein one end of the movable contact is connected with a seat and the other end is connected with a closed box body in a sliding manner, the bottom of the box body is provided with a wiring terminal, and the movable contact is a magnetizer; the box body is an insulator without magnetism; the box body is internally provided with a normally closed reed switch, and a pin of the reed switch is connected with the wiring terminal through a wire; a permanent magnet is arranged right above the reed switch, and the distance between the permanent magnet and the reed switch is less than the distance for ensuring that the magnetic field of the permanent magnet exactly enables the reed switch to act, and is more than the distance for enabling the reed switch to maintain a magnetic field action free state when the movable contact slides to be close to the permanent magnet and the reed switch. The position sensor is of a non-contact type, overcomes mechanical losses caused by mechanical friction, and has the advantages of strong interference resisting capacity, improved sensitivity and prolonged service life.
Description
Technical field
The present invention relates to a kind of position transduser, relate in particular to the seat slide position transduser in a kind of automobile air-bag system.
Background technology
Air bag system also claims auxiliary occupant restraint system, is a kind ofly to be collided and buffer air bag that can very fast expansion when being a significant slowdown when automobile, can protect the unlikely interior that bumps against of passenger, is a kind of passive safety feature.Air bag system mainly by the seat slide position transduser (Seat Track Position Sensor, STPS), composition such as gas generator, firing unit, air bag and control unit.Wherein position transduser act as provides the seat position signal to air bag system.Traditional position transduser is mechanical, during automobile normal running, as shown in Figure 1a, sensor is communicated with control unit by A, B point, the metal contact 11 of sensor and fix on dead-centre position with seat bonded assembly moving contact 12, circuit is in open loop situations, and sensor does not have energizing signal through giving control unit, and air bag system is an one-level blast state.When auto against, shown in Fig. 1 b, the force of inertia that deceleration/decel produced makes the seat move forward along track, drive moving contact 12 and also be subjected to displacement motion, moving contact 12 is combined with metal contact 11, and at this moment, circuit is in the closed loop state, sensor sends connection signal to control unit, and air bag system is the secondary detonation state.But the sensor of prior art must push perceived position by contact, and the unavoidable like this mechanical wear that occurs influences the sensitivity of sensor, reduces service life.
Summary of the invention
Defective in view of above-mentioned prior art exists the objective of the invention is to propose a kind of contactless position transduser.
Purpose of the present invention will be achieved by the following technical programs:
A kind of position transduser is used for automobile air-bag system, comprises a moving contact, and an end of described moving contact links to each other with the seat, the other end and an airtight box body sliding block joint, and the bottom of described box body is provided with connection terminal, and described moving contact is a magnetizer; Described box body is a non-magnetizer, and does not have magnetic; Be provided with normally closed dry reed pipe in the described box body, the pin of described dry-reed tube is connected with connection terminal by lead; Be provided with permanent magnet directly over the described dry-reed tube, the distance between described permanent magnet and the dry-reed tube just makes dry-reed tube that the distance of action takes place less than the magnetic field of permanent magnet; When described moving contact slid near permanent magnet and dry-reed tube, described dry-reed tube was kept no magnetic field active state.
Further, above-mentioned position transduser, wherein: the pole orientation of described permanent magnet is parallel with dry-reed tube.
Further, above-mentioned position transduser, wherein: the pole orientation of described permanent magnet is vertical with dry-reed tube.
Further, above-mentioned position transduser, wherein: the pole orientation of described permanent magnet is coaxial with dry-reed tube.
The present invention adopts the principle of armoured magnetic field excitation dry-reed tube switch, has realized the function of non-contact switch control, has overcome the mechanical wear that the traditional mechanical friction brings, simultaneously, antijamming capability is strong, has therefore improved the sensitivity of sensor, has prolonged the service life of sensor.
Following constipation closes the embodiment accompanying drawing, the specific embodiment of the present invention is described in further detail, so that technical solution of the present invention is easier to understand, grasp.
Description of drawings
Fig. 1 a be the prior art vehicle when cruising, seat is by the structural representation of the position transduser in when back;
Fig. 1 b is the structural representation of the position transduser of prior art after the seat reach;
Fig. 2 a is the structural representation of the position transduser of the embodiment of the invention 1 when seat leans on the back;
Fig. 2 b is the structural representation of the position transduser of the embodiment of the invention 1 after the seat reach;
Fig. 3 a is the structural representation of the position transduser of the embodiment of the invention 2 when seat leans on the back;
Fig. 3 b is the structural representation of the position transduser of the embodiment of the invention 2 after the seat reach;
Fig. 4 a is the structural representation of the position transduser of the embodiment of the invention 3 when seat leans on the back;
Fig. 4 b is the structural representation of the position transduser of the embodiment of the invention 3 after the seat reach.
The specific embodiment
The present invention will be described below by specific embodiment, but the present invention is not limited thereto.
A kind of position transduser of present embodiment, be used for automobile air-bag system, shown in Fig. 2 a and 2b, comprise a moving contact 1, one end of described moving contact 1 links to each other with the seat, the other end and airtight box body 2 sliding block joints, the bottom of described box body 2 is provided with connection terminal 3, and described moving contact 1 is a magnetizer, described box body 2 is a non-magnetizer, and does not have magnetic; Be provided with normally closed dry reed pipe 4 in the described box body 2, the pin of described dry-reed tube 4 is connected with connection terminal 3 by lead 5; Be provided with permanent magnet 6 directly over the described dry-reed tube 4, the pole orientation of described permanent magnet 6 is parallel with dry-reed tube 4; Distance between described permanent magnet 6 and the dry-reed tube 4 just makes dry-reed tube 4 that the distance of action takes place less than the magnetic field of permanent magnet 6, distance between described permanent magnet 6 and the dry-reed tube 4 when sliding into when moving contact 1 near permanent magnet 6 and dry-reed tube 4, the distance when just making dry-reed tube 4 keep no magnetic field active state.
Use the position transduser of present embodiment, when vehicle stationary or cruising, state shown in Fig. 2 a, because the distance between described permanent magnet 6 and the dry-reed tube 4 just makes dry-reed tube 4 that the distance of action takes place less than the magnetic field of permanent magnet 6, therefore dry-reed tube 4 is under the horizontal drive in the magnetic field of permanent magnet 6, normally closed dry-reed tube 4 switches disconnect, and are open loop circuits between two connection terminals 3.When in a single day automobile produces collision, state shown in Fig. 2 b, automotive seat are because the force of inertia reach, driving moving contact 1 moves in the middle of dry-reed tube 4 and the permanent magnet 6, because the distance the when dry-reed tube 4 when sliding into close permanent magnet 6 and dry-reed tube 4 when moving contact 1 of the distance between described permanent magnet 6 and the dry-reed tube 4 is kept no magnetic field active state, therefore permanent magnet 6 is shielded by magnetizer moving contact 1 in the magnetic field of dry-reed tube 4 present positions, normally closed dry-reed tube 4 switch closures, form closed loop circuit between two connection terminals 3, energizing signal is passed to control unit, and then start air bag system.
The structure of present embodiment and principle and the foregoing description 1 are basic identical, shown in Fig. 3 a and 3b, difference is that the pole orientation of described permanent magnet 6 is vertical with dry-reed tube 4, and dry-reed tube 4 is under the vertical drive in the magnetic field of permanent magnet 6, and normally closed dry-reed tube 4 switches disconnect.
The structure of present embodiment and principle and the foregoing description 1 are basic identical, shown in Fig. 4 a and Fig. 4 b, difference is that the pole orientation of described permanent magnet 6 is coaxial with dry-reed tube 4, and dry-reed tube 4 is under the transversely excited in the magnetic field of permanent magnet 6, and normally closed dry-reed tube 4 switches disconnect.
The present invention adopts the principle of armoured magnetic field excitation dry-reed tube switch, has realized the function of non-contact switch control, has overcome the mechanical wear that the traditional mechanical friction brings, simultaneously, antijamming capability is strong, has therefore improved the sensitivity of sensor, has prolonged the service life of sensor.
Claims (4)
1. a position transduser is used for automobile air-bag system, comprises a moving contact, one end of described moving contact links to each other with the seat, the other end and an airtight box body sliding block joint, the bottom of described box body is provided with connection terminal, it is characterized in that: described moving contact is a magnetizer; Described box body is a non-magnetizer, and does not have magnetic; Be provided with normally closed dry reed pipe in the described box body, the pin of described dry-reed tube is connected with connection terminal by lead; Be provided with permanent magnet directly over the described dry-reed tube, the distance between described permanent magnet and the dry-reed tube just makes dry-reed tube that the distance of action takes place less than the magnetic field of permanent magnet; When described moving contact slid near permanent magnet and dry-reed tube, described dry-reed tube was kept no magnetic field active state.
2. position transduser according to claim 1 is characterized in that: the pole orientation of described permanent magnet is parallel with dry-reed tube.
3. position transduser according to claim 1 is characterized in that: the pole orientation of described permanent magnet is vertical with dry-reed tube.
4. position transduser according to claim 1 is characterized in that: the pole orientation of described permanent magnet is coaxial with dry-reed tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110054963 CN102126478A (en) | 2011-03-09 | 2011-03-09 | Position sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110054963 CN102126478A (en) | 2011-03-09 | 2011-03-09 | Position sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102126478A true CN102126478A (en) | 2011-07-20 |
Family
ID=44264846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110054963 Pending CN102126478A (en) | 2011-03-09 | 2011-03-09 | Position sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102126478A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103419718A (en) * | 2012-02-03 | 2013-12-04 | 奇瑞汽车股份有限公司 | Scratch-prevention reminding device on front portion of car |
| CN107107851A (en) * | 2015-11-17 | 2017-08-29 | 哈姆林电子(苏州)有限公司 | Detect the movement of seat belt sensor |
| CN111838508A (en) * | 2020-07-27 | 2020-10-30 | 合肥华凌股份有限公司 | Foaming device, refrigeration equipment and foaming control method |
| TWI727561B (en) * | 2019-12-23 | 2021-05-11 | 環名興業有限公司 | Switching magnetic reed detector |
| CN116294947A (en) * | 2022-12-05 | 2023-06-23 | 中国长江三峡集团有限公司 | Perpendicular double-axis displacement measurement device, system and method based on magnetic induction |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020027348A1 (en) * | 1999-08-04 | 2002-03-07 | Speckhart Frank H. | Sensor pad for controlling airbag deployment and associated support |
| CN1509923A (en) * | 2002-10-11 | 2004-07-07 | 西门子公司 | Magnetic Position Sensor |
| CN200962404Y (en) * | 2006-04-04 | 2007-10-17 | 刘虎 | Magnetic spring switch |
| CN201080166Y (en) * | 2007-03-23 | 2008-07-02 | 上海奇谋能源技术开发有限公司 | Device for correcting safety gasbag control system by seat |
| CN201961268U (en) * | 2011-03-09 | 2011-09-07 | 哈姆林电子(苏州)有限公司 | Position sensor |
-
2011
- 2011-03-09 CN CN 201110054963 patent/CN102126478A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020027348A1 (en) * | 1999-08-04 | 2002-03-07 | Speckhart Frank H. | Sensor pad for controlling airbag deployment and associated support |
| CN1509923A (en) * | 2002-10-11 | 2004-07-07 | 西门子公司 | Magnetic Position Sensor |
| CN200962404Y (en) * | 2006-04-04 | 2007-10-17 | 刘虎 | Magnetic spring switch |
| CN201080166Y (en) * | 2007-03-23 | 2008-07-02 | 上海奇谋能源技术开发有限公司 | Device for correcting safety gasbag control system by seat |
| CN201961268U (en) * | 2011-03-09 | 2011-09-07 | 哈姆林电子(苏州)有限公司 | Position sensor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103419718A (en) * | 2012-02-03 | 2013-12-04 | 奇瑞汽车股份有限公司 | Scratch-prevention reminding device on front portion of car |
| CN103419718B (en) * | 2012-02-03 | 2015-07-15 | 奇瑞汽车股份有限公司 | Scratch-prevention reminding device on front portion of car |
| CN107107851A (en) * | 2015-11-17 | 2017-08-29 | 哈姆林电子(苏州)有限公司 | Detect the movement of seat belt sensor |
| TWI727561B (en) * | 2019-12-23 | 2021-05-11 | 環名興業有限公司 | Switching magnetic reed detector |
| CN111838508A (en) * | 2020-07-27 | 2020-10-30 | 合肥华凌股份有限公司 | Foaming device, refrigeration equipment and foaming control method |
| CN111838508B (en) * | 2020-07-27 | 2023-09-29 | 合肥华凌股份有限公司 | Foaming device, refrigeration equipment and foaming control method |
| CN116294947A (en) * | 2022-12-05 | 2023-06-23 | 中国长江三峡集团有限公司 | Perpendicular double-axis displacement measurement device, system and method based on magnetic induction |
| CN116294947B (en) * | 2022-12-05 | 2023-10-20 | 中国长江三峡集团有限公司 | Perpendicular double-axis displacement measurement device, system and method based on magnetic induction |
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Application publication date: 20110720 |