CN208419856U - A kind of embedded hall displacement transducer of magnet and electronic hydraulic brake system - Google Patents
A kind of embedded hall displacement transducer of magnet and electronic hydraulic brake system Download PDFInfo
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- CN208419856U CN208419856U CN201820357539.6U CN201820357539U CN208419856U CN 208419856 U CN208419856 U CN 208419856U CN 201820357539 U CN201820357539 U CN 201820357539U CN 208419856 U CN208419856 U CN 208419856U
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- hall
- magnet
- sensor
- push rod
- displacement transducer
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Abstract
The utility model discloses a kind of embedded hall displacement transducer of magnet.It slides axially in shell (3) and end cap (2) including push rod (1).Set of permanent magnets (4) is made of two or more magnet arrays, and in the hollow hole of push rod (1).Adjacent magnets polarity same side is close to placement.Sensor line plate (5) puts one or more Hall sensors in shell (3).Set of permanent magnets (4) is moved axially with push rod (1), and Hall sensor (6) detects magnetic field angle variation, and output signal is related with magnet positions, to measure push rod (1) displacement.Compared with prior art, the utility model detection magnetic field angle variation determines displacement, and compared with detecting magnetic field strength, solving the problems, such as that magnetic strength is affected by temperature reduces precision more greatly.By magnet loaded in push rod hollow hole, magnet moving distance is made not limited by outer casing space and improve detection stroke.By arranging that multiple Hall sensors make redundancy backup, reliability is improved.
Description
Technical field
The utility model relates to displacement transducer technology fields, more particularly, to Novel Non-Contact Type Hall Displacement Sensor technology
Field.
Background technique
Displacement sensor is also known as linear transducer, for measuring the displacement or relative distance of object of which movement.Domestic at present
Displacement sensor mostly uses contact measurement method.In the electronic hydraulic brake system of automotive field, the most commonly used is slidings to become
Hinder device tangent displacement sensor.Touch sensor measurement needs the mutual reliable contacts of the measuring medium of relative motion, to work
It is poor to make environmental suitability, and cannot have steam, dust to enter contact area；May cause contact under vibration environment can not
It leans on；Long-time service is there are measuring medium abrasion, the defects of durability is inadequate, and precision is gradually deteriorated.It is difficult to meet bad environments, length
The measurement request of phase work.
And current contactless Hall sensor, due to by magnetic field of magnets characteristic and magnetic field of magnets intensity by temperature shadow
Biggish limitation is rung, thin tail sheep (generally less than 20mm) detection and small temperature range (generally -10 DEG C~85 are only used for
DEG C) working environment under.
Utility model content
The purpose of this utility model is to provide a kind of simple and reliable, it is easily installed, low in cost, precision is high, the service life is long,
Detect that stroke range is big and the embedded hall displacement transducer of a kind of magnet suitable for -40 DEG C~150 DEG C temperature, to solve
The problem of being mentioned in above-mentioned background technique.
To achieve the above object, the utility model provides the following technical solutions: a kind of embedded Hall displacement sensing of magnet
Device, including push rod, sensor end cap, sensor outer housing, set of permanent magnets, Hall sensor wiring board and Hall sensor, institute
It states push rod to slide axially along sensor outer housing, the sensor end cap slides axially for push rod and provides guiding role, the sensing
Device interior of shell is equipped with Hall sensor wiring board, while also sliding axially for push rod and providing guiding role, the set of permanent magnets
It is made of two or more magnet arrays, in the hollow hole of push rod, and is arranged successively, the magnetic field angle of generation can make
Hall sensor induces electric signal, comprising one or more Hall sensors on the Hall sensor wiring board, it is described suddenly
Your sensor can detect the variation of magnetic field angle, generate electrical signal of reaction.
Since the magnetic field strength of the middle section of long magnet is weaker, and magnetic field strength and magnetic field angle variation are unknown
It is aobvious, cause the displacement detection precision in magnet middle section low, therefore Hall position cannot be increased using the scheme for lengthening magnet
The detection stroke range of displacement sensor, also, magnet can move apart from size also by the inner space of sensor outer housing
Size limitation, this is but also the detection stroke range of displacement sensor reduces.In addition, magnetic field strength be affected by temperature it is bigger,
If using magnetic field strength as sensed conditions, sensor is difficult to work normally under the conditions of more severe temperature.Therefore, this is practical
New patent proposes to use two or more short magnet, is composed in turn to form the scheme of set of permanent magnets, is significantly reduced magnetic
The small adverse effect of iron middle section magnetic field angle change rate, magnet is placed in the hollow hole of push rod, can be made
The moving distance size of magnet is not limited by the inner space size of sensor outer housing, this can greatly improve the detection of sensor
Stroke range.In addition, sensor selects magnetic field angle as sensed conditions, it can also stablize output in the environment of high/low temperature, mention
The high reliability of sensor.Between each adjacent two magnet there are gap can be used non-magnet material filling,
To fixed magnet.
Wherein, the identical one end placement close to each other of any two adjacent magnet polarities in the set of permanent magnets, from
And the magnetic field angle change rate of the gap site between two adjacent magnets of guarantee is big, to improve the detection essence of displacement sensor
Degree.
Wherein, there are one or more Hall sensors on the Hall sensor wiring board, using a Hall sensor
The measurement of displacement can be realized；Multiple Hall sensors can also be used, effect has redundancy backup, improves the reliable of sensor
Property and measurement accuracy.
Wherein, the electrical signal of reaction that the Hall sensor on the Hall sensor wiring board generates can be directly as biography
The output signal of sensor, can also be after signal processing circuit be handled as the output signal of sensor.
Wherein, the sensor outer housing and/or sensor side, which cover, can be coated with one layer of magnetic shield material, such as steel
Set.To shield the interference of external magnetic field or permeability magnetic material to sensor, it is also possible to the magnetic field pair of the magnet of shield sensor
Extraneous interference.
A kind of electronic hydraulic brake system with the embedded hall displacement transducer of magnet, including push rod, forever
Magnet group and Hall sensor wiring board, the set of permanent magnets are placed in the hollow hole of push rod, the Hall sensor route
One or more Hall sensor queues are arranged on plate.When driver's foot pedal, pedal push rod makees straight-line displacement, simultaneously
It drives the set of permanent magnets being fixed in master cylinder push rod hollow hole and generates relative displacement between Hall sensor sensor circuit, sense
The displacement signal that device detects is sent in the intracorporal electronic control unit of shell, obtains pedal displacement information, automatically controlled by calculation processing
Unit can control motor and generate respective torque, and motor torque passes through the gear of worm screw, worm gear and associated knot, slow down and increase
It turns round, is transmitted to rack gear, push master cylinder, so that master cylinder is established corresponding hydraulic coupling, generate suitable brake force, complete conventional help
Dynamic braking process.During this, push rod is not in contact with hall sensor circuit plate, improves the reliable of displacement sensor
Property, and by the way that set of permanent magnets to be placed in the hollow hole of push rod, electronic hydraulic brake system enclosure interior is greatly saved
Arrangement space.
Compared with existing tangent displacement sensor, the utility model has the following beneficial effects: it is simple and reliable, it is easy to pacify
Dress, low in cost, measurement accuracy is high, and the service life is long, and use environment temperature range is big.Compared with existing hall displacement transducer, lead to
Super-interval arranges two or more short magnet, solves that long magnet middle section magnetic field strength is weak and magnetic field angle variation is unobvious brings
The low problem of displacement detection precision.Magnet is placed in the hollow hole of push rod, so that the detection row of Hall displacement transducer
Journey range greatly improves.By the multiple Hall sensors of arranged for interval, precision is further increased, and can be used as redundancy backup, mentioned
High sensor reliability.
Detailed description of the invention
Fig. 1 is a kind of embedded hall displacement transducer structure sectional view of magnet of the present embodiment；
Fig. 2 is a kind of electronic hydraulic brake system part knot with the embedded hall displacement transducer of magnet of the present embodiment
Structure cross-sectional view；
Attached drawing 1 marks:
1 is push rod；2 be sensor end cap；3 be sensor outer housing；4 be set of permanent magnets；5 be Hall sensor wiring board；6
For Hall sensor.
Attached drawing 2 marks:
1 is pedal connector；2 be push rod；3 be elastic element pedestal；4 be elastic element；5 be master cylinder push rod；6 lead for push rod
Rail；7 be sensor outer housing；8 be set of permanent magnets；9 be Hall sensor wiring board；10 be Hall sensor；11 be rack gear；12 are
Electronic control unit (ECU)；13 be master cylinder connector；14 be buffer stopper；15 be brake casing；16 be master cylinder；17 be motor；18 be snail
Bar；19 be worm gear；20 be gear.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.The present embodiment is with the utility model
Implemented premised on technical solution, the detailed implementation method and specific operation process are given, but the guarantor of the utility model
Shield range is not limited to the following embodiments.
Embodiment 1
As shown in Figure 1, a kind of non-contact displacement transducer based on Hall effect, including push rod (1), sensor side
Cover (2), sensor outer housing (3), set of permanent magnets (4), Hall sensor wiring board (5) and Hall sensor (6), the push rod
(1) it slides axially along sensor outer housing (3) and sensor end cap (2), the sensor end cap (2) is that push rod (1) slides axially
Guiding role is provided, Hall sensor wiring board (5) are housed inside the sensor outer housing (3), while is also axial for push rod (1)
Sliding provides guiding role, and the set of permanent magnets (4) is placed in the hollow hole of push rod (1) by two or more magnet, and successively
Arrangement, the magnetic field angle of generation can make Hall sensor (6) induce electric signal, on the Hall sensor wiring board (5)
Comprising one or more Hall sensors (6), the Hall sensor (6) can detect the variation of magnetic field angle, generate induced electricity
Signal.
The set of permanent magnets (4) is made of two or more magnet, is arranged successively, any two adjacent magnet polarities
Identical one end placement close to each other.There are gap between every two adjacent magnets, non-magnet material filling is can be used in gap.
One or more Hall sensors are arranged on the Hall sensor wiring board (5), between each Hall sensor
Every arrangement.
The working principle of the utility model is as follows: sensor push rod and sensor outer housing are separately fixed at detected two
On the object of relative motion.The relative motion of object to be detected causes push rod axially sliding along sensor outer housing and sensor end cap
Dynamic, magnetic field angle caused by the set of permanent magnets being placed in push rod hollow hole also follows push rod to generate straight-line displacement accordingly, from
And relative displacement is formed with the Hall sensor wiring board remained stationary inside sensor outer housing, Hall sensor inspection
Induction generates the electric signal changed after measuring changing magnetic field angle, to detect the opposite position of push rod and sensor outer housing
It moves.
Embodiment 2
A kind of electronic hydraulic brake system with the embedded hall displacement transducer of magnet as described in Example 1, such as
Shown in Fig. 2, including push rod (2), set of permanent magnets (8) and Hall sensor wiring board (9), the set of permanent magnets are placed in push rod
In hollow hole, one or more Hall sensor queues are arranged on the Hall sensor wiring board.When driver's foot is trampled
When plate, pedal push rod (2) makees straight-line displacement, at the same drive the set of permanent magnets (8) that is fixed in master cylinder push rod (5) hollow hole with suddenly
Relative displacement is generated between your sensor (10) sensor circuit, it is intracorporal automatically controlled that the displacement signal that sensor detects is sent to shell
In unit (12), pedal displacement information is obtained, by calculation processing, electronic control unit can control motor (17) and generate respective torque,
Motor torque passes through the gear (20) of worm screw (18), worm gear (19) and associated knot, and deceleration torque increase is transmitted to rack gear
(11), master cylinder (16) are pushed, so that master cylinder is established corresponding hydraulic coupling, generates suitable brake force, complete conventional power-assisted system
Dynamic process.
The above is only the preferred embodiment of the utility model, is for convenient for those skilled in the art
It can understand and apply the utility model.Those skilled in the art obviously can readily make these embodiments various
Modification, and General Principle described herein is applied to other embodiments without having to go through creative labor.Therefore, this is practical
The novel embodiment being not limited to here, those skilled in the art's announcement according to the present utility model, is not departing from the utility model
Several improvement and modification made under the premise of technical principle also should be regarded as being within the protection scope of the utility model.
Claims (9)
1. a kind of embedded hall displacement transducer of magnet characterized by comprising push rod (1) is axially sliding along sensor outer housing
It is dynamic；Sensor end cap (2) slides axially for push rod and provides guiding role；Sensor outer housing (3), inside are equipped with Hall sensor
Wiring board, while also sliding axially for push rod and guiding role is provided；Set of permanent magnets (4), there are two or multiple magnet be placed in push rod
(1) in hollow hole, the magnetic field angle variation of generation can make Hall sensor induce different size of electric signal；Hall passes
Sensor wiring board (5) generates electrical signal of reaction comprising one or more Hall sensors on the wiring board；Hall sensor
(6), the variation of magnetic field angle is detected, electrical signal of reaction is exported.
2. the embedded hall displacement transducer of a kind of magnet according to claim 1, which is characterized in that the permanent magnet
Group (4) is made of two or more magnet, is arranged successively, and there are gap between every two magnet, set of permanent magnets (4) is placed in push rod
(1) in hollow hole.
3. the embedded hall displacement transducer of a kind of magnet according to claim 1, which is characterized in that the permanent magnet
The identical one end placement close to each other of any two adjacent magnet polarities in group (4).
4. the embedded hall displacement transducer of a kind of magnet according to claim 1, which is characterized in that the permanent magnet
Non-magnet material filling can be used in the gap between adjacent two magnet in group (4).
5. the embedded hall displacement transducer of a kind of magnet according to claim 1, which is characterized in that the hall sensing
One or more Hall sensor queues are arranged on device wiring board (5).
6. the embedded hall displacement transducer of a kind of magnet according to claim 1, which is characterized in that the hall sensing
The sensor queue arranged on device wiring board (5) is made of one or more Hall sensors, each Hall sensor interval
Arrangement.
7. the embedded hall displacement transducer of a kind of magnet according to claim 1, which is characterized in that the hall sensing
The electrical signal of reaction that Hall sensor on device wiring board (5) generates can be directly as the output signal of sensor, can also be with
As the output signal of sensor after signal processing circuit is handled.
8. the embedded hall displacement transducer of a kind of magnet according to claim 1, which is characterized in that outside the sensor
It can be coated with one layer of magnetic shield material in shell (3) and/or sensor end cap (2).
9. a kind of electro-hydraulic brake of band embedded hall displacement transducer of magnet any just like claim 1~8
System, which is characterized in that including push rod, set of permanent magnets and Hall sensor wiring board, the set of permanent magnets is placed in push rod
In hollow hole, one or more Hall sensor queues are arranged on the Hall sensor wiring board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820357539.6U CN208419856U (en) | 2018-03-19 | 2018-03-19 | A kind of embedded hall displacement transducer of magnet and electronic hydraulic brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820357539.6U CN208419856U (en) | 2018-03-19 | 2018-03-19 | A kind of embedded hall displacement transducer of magnet and electronic hydraulic brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208419856U true CN208419856U (en) | 2019-01-22 |
Family
ID=65119770
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820357539.6U Active CN208419856U (en) | 2018-03-19 | 2018-03-19 | A kind of embedded hall displacement transducer of magnet and electronic hydraulic brake system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195279A (en) * | 2018-03-19 | 2018-06-22 | 上海同驭汽车科技有限公司 | A kind of embedded hall displacement transducer of magnet and electronic hydraulic brake system |
| CN112690861A (en) * | 2019-10-23 | 2021-04-23 | 苏州英途康医疗科技有限公司 | Medical instrument, working head and clip feeding position identification method |
| CN114577099A (en) * | 2020-11-16 | 2022-06-03 | 深圳市万普拉斯科技有限公司 | Position detection system, lens, zooming method and terminal |
| CN115163608A (en) * | 2022-07-11 | 2022-10-11 | 浙江工业大学 | Hydraulic cylinder integrated with variable magnetic general speed sensor |
-
2018
- 2018-03-19 CN CN201820357539.6U patent/CN208419856U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195279A (en) * | 2018-03-19 | 2018-06-22 | 上海同驭汽车科技有限公司 | A kind of embedded hall displacement transducer of magnet and electronic hydraulic brake system |
| CN112690861A (en) * | 2019-10-23 | 2021-04-23 | 苏州英途康医疗科技有限公司 | Medical instrument, working head and clip feeding position identification method |
| CN112690861B (en) * | 2019-10-23 | 2023-01-20 | 苏州英途康医疗科技有限公司 | Medical instrument, working head and clip feeding position identification method |
| CN114577099A (en) * | 2020-11-16 | 2022-06-03 | 深圳市万普拉斯科技有限公司 | Position detection system, lens, zooming method and terminal |
| CN114577099B (en) * | 2020-11-16 | 2023-11-28 | 深圳市万普拉斯科技有限公司 | Position detection system, lens, zooming method and terminal |
| CN115163608A (en) * | 2022-07-11 | 2022-10-11 | 浙江工业大学 | Hydraulic cylinder integrated with variable magnetic general speed sensor |
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