CN201740503U - Precise displacement sensor - Google Patents
Precise displacement sensor Download PDFInfo
- Publication number
- CN201740503U CN201740503U CN2010202217693U CN201020221769U CN201740503U CN 201740503 U CN201740503 U CN 201740503U CN 2010202217693 U CN2010202217693 U CN 2010202217693U CN 201020221769 U CN201020221769 U CN 201020221769U CN 201740503 U CN201740503 U CN 201740503U
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- CN
- China
- Prior art keywords
- displacement transducer
- displacement
- axle sleeve
- shell
- turning axle
- Prior art date
- 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 - Fee Related
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The utility model discloses a precise displacement sensor, which comprises a housing (1), a circuit board (2) arranged in the housing, a shaft sleeve (5) arranged in the electric housing (1), a rotating shaft (3), a permanent magnet (7) and a wire rope (6), wherein one end of the rotating shaft (3) is sleeved into the shaft sleeve (5), the other end of the rotating shaft (3) is connected with a rotating wheel (4), the permanent magnet (7) is fixed at one end of the rotating shaft (3), and the wire rope is wound in a sliding groove of the rotating wheel. The utility model is characterized in that the rotating shaft (3) between the rotating wheel (4) and the shaft sleeve (5) is also provided with an elastic device (3). The surface contact part of the housing (1) is provided with a sealing device (9). The displacement sensor not only has high precision and small size, but also has strong wear resistance, shock resistance and water, oil and dust preventing effects.
Description
Technical field
The utility model relates to a kind of pick-up unit, is a kind of displacement detector specifically, particularly a kind of precise displacement sensor.
Background technology
Displacement transducer is called linear transducer again, is displacement conversion the sensor of electric weight.Displacement transducer is a kind of linear unit that belongs to the metal induction, the effect of sensor is various measurands to be converted to electric weight it is divided into inductive displacement transducer, capacitive displacement transducer, optical displacement sensor, the ultrasonic type displacement transducer, Hall displacement transducer.
On crane or automobile, displacement signal collection and demonstration are very important and necessary for the safe operation of hoisting device or automobile.And displacement transducer can be divided into analog and digital two kinds by the form difference of measured variable conversion.Displacement transducer commonly used is in the majority with the analog structure type, comprises inductive displacement transducer and potentiometric displacement transducer.
Inductive displacement transducer is a kind of linear unit that belongs to the metal induction, after the energized, sensitive surface at switch will produce an alternating magnetic field, when metal object during near this sensitive surface, then produce eddy current in the metal and drawn the energy of oscillator, make the linear attenuation of oscillator output amplitude, finish the purpose of contactless inspected object then according to the variation of damping capacity.
Potentiometric displacement transducer converts mechanical shift to by the potentiometer element resistance or the voltage output of linear with it or arbitrary function relation.Generic linear potentiometer and circular potentiometer all can be used separately as straight-line displacement and angular displacement sensor.The advantage of potentiometric displacement transducer is: simple in structure, output signal is big, and is easy to use, cheap.But, be the potentiometer of realizing that the Displacement Measurement purpose designs, require between change in displacement and resistance variations, to have one and determine relation.Usually on potentiometer, pass to supply voltage, resistance variations is converted to voltage output.Resistance was that ladder changes with circle resistance when the wire wound potentiometer moved owing to its brush, and its output characteristics also is stepped appearance.If this displacement transducer is used as the Displacement Feedback element in servo-drive system, then excessive step voltage can cause system oscillation.Therefore in the making of potentiometer, should reduce the resistance value of every circle as far as possible.Another major defect of potentiometric transducer is easy to wear.
Is that Dec 29, the patent No. in 2008 are that ZL200820067347.8, patent name are in the patent document of " built-in lasting high accuracy displacement sensor " at Granted publication number for CN 201225870Y, the applying date, introduced a kind of built-in lasting high accuracy displacement sensor, this sensor is by displacement rope multiple wraps on reel, thereby increased displacement measurement length, had characteristics such as volume is little, precision height.But the displacement rope wears no resistance, and shock resistance is low, thereby influences the effect of sensor serviceable life and measurement.
The utility model content
The technical problems to be solved in the utility model is: a kind of precise displacement sensor is provided, and this displacement transducer not only precision height, volume is little, and has stronger wearing quality and shock resistance, thereby has improved the serviceable life and the measuring accuracy of sensor.
In order to solve the problems of the technologies described above, the utility model by the following technical solutions:
A kind of precise displacement sensor, comprise that shell, wiring board and axle sleeve, the end installed in the enclosure are inserted in axle sleeve, the turning axle that the other end is connected with swiveling wheel, be fixed on the permanent magnet of described turning axle one end and be wrapped in wire rope in the swiveling wheel chute, this elastic device of an elastic device also is installed on the turning axle between described swiveling wheel and the axle sleeve can spring.This spring can play good buffer action to the vibrations that displacement transducer is received, thereby improves the shock resistance of displacement transducer.
According to displacement transducer described in the utility model, be preferably, the centre position is installed with a magnetometric sensor in the described shell, and this magnetometric sensor is electrically connected with wiring board.
According to displacement transducer described in the utility model, be preferably, the center of described swiveling wheel is the large semi-circular cavernous structure, its size matches with turning axle.
According to displacement transducer described in the utility model, be preferably, O type guard ring is installed between described turning axle and the axle sleeve, the end that contacts with axle sleeve at turning axle is equipped with pad, shields, and can improve displacement transducer serviceable life.
According to displacement transducer described in the utility model, be preferably, the face contact site of described shell is equipped with packoff, and the sealing device can be O-ring seal, diaphragm seal or fluid sealant.Realize hermetically sealed, waterproof, grease proofing and dustproof.
Precise displacement sensor described in the utility model, not only precision height, volume are little, and have stronger wearing quality, shock resistance and waterproof, grease proofing and dustproof effect.
Description of drawings
Fig. 1 is the structural representation of precise displacement sensor described in the utility model;
Fig. 2 is the partial enlarged drawing of precise displacement sensor shown in Figure 1.
Embodiment
Below, for a more detailed description to the utility model in conjunction with the accompanying drawings with embodiment.These embodiment only are the descriptions to the utility model preferred forms, scope of the present utility model are not had any restriction.
Embodiment
As shown in Figure 1, be the structural representation of precise displacement sensor described in the utility model, it comprises shell 1, wiring board 2, turning axle 3, swiveling wheel 4, axle sleeve 5, wire rope 6, permanent magnet 7, elastic device 8 and packoff 9.Wiring board 2 and axle sleeve 5 are fixed in the shell 1, and turning axle 3 one end cutting ferrules are gone in the axle sleeve 5, and can be rotated within it, and the other end is connected with swiveling wheel 4, and the center of swiveling wheel 4 is the large semi-circular cavernous structure, and its size matches with turning axle.One elastic device 8 also is installed on the turning axle 3 between described swiveling wheel 4 and the axle sleeve 5, and this elastic device 8 can spring.One end of this spring is stuck on the shell, and the other end is stuck on the axle, and spring force can make axle come back rotation, thereby good buffer action is played in the vibrations that displacement transducer is received, improves the shock resistance of displacement transducer.
The centre position also is installed with a magnetometric sensor in the shell 1 of this displacement transducer, and this magnetometric sensor is connected with wiring board electricity 2.Magnetometric sensor is over against permanent magnet 7, when wire rope 6 moves, will rotate by driven rotary wheel 4, by the motion of turning axle 3 in the magnetic field that permanent magnet 7 produces, thereby changes of magnetic field takes place, detect the concrete variation in magnetic field again by magnetometric sensor, import wiring board into, advanced the signal Processing and the conversion of circuit in the wiring board, and exported voltage signal, thereby accurately record displacement with change in displacement.
In addition, O type guard ring is housed also between turning axle 3 and axle sleeve 5, turning axle 3 is equipped with pad with the end that axle sleeve 5 contacts, and can play turning axle 3 protective effect with axle sleeve 5, thereby improve displacement transducer serviceable life.Face contact site at shell 1 is equipped with packoff 9, and the sealing device can be O-ring seal, diaphragm seal or fluid sealant.Realize hermetically sealed, thereby improve waterproof, grease proofing and anti-dust performance.
Precise displacement sensor described in the utility model, not only precision height, volume are little, and have stronger wearing quality, shock resistance and waterproof, grease proofing and dustproof effect.
Claims (8)
1. precise displacement sensor, it comprises shell (1), be installed in the wiring board (2) in the shell (1), axle sleeve (5), an end that is installed in the electric shell (1) is inserted in axle sleeve (5), the turning axle (3) that the other end is connected with swiveling wheel (4), the permanent magnet (7) that is fixed on described turning axle (3) one ends and be wrapped in wire rope (6) in the swiveling wheel chute is characterized in that: on the turning axle (3) between described swiveling wheel (4) and the axle sleeve (5) elastic device (8) is installed also.
2. displacement transducer according to claim 1 is characterized in that: described elastic device (8) is a spring.
3. displacement transducer according to claim 1 is characterized in that: the interior centre position of described shell (1) is installed with a magnetometric sensor, and this magnetometric sensor is electrically connected with wiring board (2).
4. displacement transducer according to claim 1 is characterized in that: the center of described swiveling wheel (4) is the large semi-circular cavernous structure.
5. displacement transducer according to claim 1 is characterized in that: between described turning axle (3) and the axle sleeve (5) O type guard ring is installed.
6. displacement transducer according to claim 1 is characterized in that: described turning axle (3) is equipped with pad with the end that axle sleeve (5) contacts.
7. according to each described displacement transducer in the claim 1 to 6, it is characterized in that: the face contact site of described shell (1) is equipped with packoff (9).
8. displacement transducer according to claim 7 is characterized in that: described packoff (9) is O-ring seal, diaphragm seal or fluid sealant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202217693U CN201740503U (en) | 2010-03-16 | 2010-06-02 | Precise displacement sensor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020134026 | 2010-03-16 | ||
| CN201020134026.2 | 2010-03-16 | ||
| CN2010202217693U CN201740503U (en) | 2010-03-16 | 2010-06-02 | Precise displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201740503U true CN201740503U (en) | 2011-02-09 |
Family
ID=43555779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202217693U Expired - Fee Related CN201740503U (en) | 2010-03-16 | 2010-06-02 | Precise displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201740503U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438795A (en) * | 2013-07-29 | 2013-12-11 | 湖南三一智能控制设备有限公司 | Length detection device, length detection method and engineering machine |
| CN105547126A (en) * | 2016-02-01 | 2016-05-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Eddy current displacement sensor |
-
2010
- 2010-06-02 CN CN2010202217693U patent/CN201740503U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438795A (en) * | 2013-07-29 | 2013-12-11 | 湖南三一智能控制设备有限公司 | Length detection device, length detection method and engineering machine |
| CN105547126A (en) * | 2016-02-01 | 2016-05-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Eddy current displacement sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Shenzhen Celijia Control Technology Co., Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Shenzhen Celijia Control Technology Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20140602 |
|
| EXPY | Termination of patent right or utility model |