CN101832749B - Anti-error displacement transducer for Hall-type single-path signal output - Google Patents
Anti-error displacement transducer for Hall-type single-path signal output Download PDFInfo
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- CN101832749B CN101832749B CN2010101702802A CN201010170280A CN101832749B CN 101832749 B CN101832749 B CN 101832749B CN 2010101702802 A CN2010101702802 A CN 2010101702802A CN 201010170280 A CN201010170280 A CN 201010170280A CN 101832749 B CN101832749 B CN 101832749B
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Abstract
The invention relates to a simple-structured, low-cost anti-error displacement transducer for Hall-type single-path signal output, which can realize anti-error function only by outputting single-path signals. In the invention, a retractable transmission shaft is placed in the displacement transducer, the displacement transducer is characterized in that a non-closed circle structure magnetic body composed of two semi-ring permanent magnets is fixed on the transmission shaft, magnetic steel is fixed in the transducer body, a switch-type Hall integrated circuit and a linear Hall integrated circuit which are vertical to each other are arranged in the magnetic steel, the switch-type Hall integrated circuit faces the gap between the two semi-ring permanent magnets; a power protecting circuit and a electronic switch are also arranged in the displacement transducer body, an output terminal of the power protecting circuit is connected with an input terminal of the switch-type Hall integrated circuit, the output terminal of the switch-type Hall integrated circuit is connected with the linear Hall integrated circuit by the electronic switch, the input terminal of the power protecting circuit is exactly the power source terminal and the earth terminal of the anti-error displacement transducer, the output terminal of the linear Hall integrated circuit is exactly the signal output terminal of the anti-error displacement transducer.
Description
Technical field
The invention belongs to electromagnetism and electronic control technology, particularly a kind of anti-error displacement transducer of Hall-type single-path signal output.
Background technology
Traditional displacement transducer mainly contains tangent displacement sensor and magnetic resistance non-contact displacement transducer, and tangent displacement sensor is owing to be provided with the contact contact, easy abrasion, poor reliability, the easy electric spark that produces; The degree of accuracy of magnetic resistance non-contact displacement transducer is not very high relatively.The quality of displacement transducer performance directly has influence on the running quality of control panel, seems particularly important in some occasions that relate to personal safety especially.Along with further investigation to electromagnetism and electronic control technology; People are also increasingly high for the requirement of various displacement transducers; Particularly the displacement transducer of error-disable function has promoted to the reliability of device control with to the security of the person, so range of application more and more widely.The Hall non-contacting sensor is owing to have many characteristics such as high precision and high life, increasingly used by people.Mostly present Hall displacement transducer is single channel or the output of two-way signal; The Hall displacement transducer of one-channel signal output is simple in structure, cost is low; But generally there is not error-disable function; And the linearity of the Hall displacement transducer of two-way signal output through two-way output signal be to judging recently whether sensor error-disable function occurs realizing unusually, but its complex structure, cost are high.
Summary of the invention
The technical matters that the present invention will solve provide a kind of simple in structure, cost is low, only exports the anti-error displacement transducer that one-channel signal but can be realized the Hall-type single-path signal output of error-disable function.
The technical scheme that the present invention takes is:
The anti-error displacement transducer of this Hall-type single-path signal output comprises a displacement transducer body 3; In displacement transducer body 3, be placed with reducible transmission shaft 1; Its special character is: on transmission shaft 1, be fixed with by two semi-ring permanent magnets 7,10 and form non-closed annular structure magnetic body; One of them is the N utmost point, another is the S utmost point; At the sensor body internal fixation magnet steel 8 is arranged; Described magnet steel 8 is inside and outside corresponding with two semi-ring permanent magnets, 7,10 positions; In magnet steel 8, be provided with the linear Hall integrated circuit 9 of Hall switch integrated circuit 12 that is used to detect the variation in magnetic field and export high and low level and the single channel linear signal output of carrying out voltage, described Hall switch integrated circuit 12 and Hall switch integrated circuit 12 vertical each other with linear Hall integrated circuit 9 faced the gap location of two semi-ring permanent magnets 7,10, in displacement transducer body 3, also is provided with power protecting circuit 13 and electronic switch 14; The output terminal of power protecting circuit 13 links to each other with the input end of Hall switch integrated circuit 12; Hall switch integrated circuit 12 output terminals are connected with linear Hall integrated circuit 9 through electronic switch 14, and the input end of power protecting circuit 13 is the power end 15 and earth terminal 16 of this anti-error displacement transducer, and the output terminal of linear Hall integrated circuit 9 is the signal output part 17 of this anti-error displacement transducer.
The anti-error displacement transducer of above-mentioned Hall-type single-path signal output, described Hall switch integrated circuit 12 is highly consistent with two semi-ring permanent magnets 7,10 with linear Hall integrated circuit 9.
The anti-error displacement transducer of above-mentioned Hall-type single-path signal output, described power protecting circuit 13, Hall switch integrated circuit 12, electronic switch 14 and linear Hall integrated circuit 9 are installed on the wiring board 5.
The anti-error displacement transducer of above-mentioned Hall-type single-path signal output, described Hall switch integrated circuit 12 is positioned at wiring board 5 one sides with linear Hall integrated circuit 9, and power protecting circuit 13 is positioned at wiring board 5 another sides with electronic switch 14.
The invention has the beneficial effects as follows: to the detection of variation magnetic field, make sensor only export one-channel signal and but realized error-disable function through a Hall switch integrated circuit and linear Hall integrated circuit.Both satisfied displacement transducer for error-disable function requirement, with respect to the anti-error displacement transducer of two-way signal output, structure is simpler, greatly reduce cost.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the A-A cut-open view of Fig. 1;
Fig. 3 is a circuit block diagram of the present invention;
Fig. 4 is circuit theory diagrams of the present invention.
Among the figure: transmission shaft 1, back-moving spring 2, displacement transducer body 3, shielding iron hoop 4, wiring board 5; End cap 6, semi-ring permanent magnet 7, magnet steel 8, linear Hall integrated circuit 9; Semi-ring permanent magnet 10, lead pin 11, Hall switch integrated circuit 12, power protecting circuit 13; Electronic switch 14, power end 15, earth terminal 16, output terminal 17.
Embodiment
As shown in the figure; The present invention has a displacement transducer body 3; In displacement transducer body 3, be placed with transmission shaft 1, turning with the sensor outer buttons when transmission shaft 1 upper surface has detent and connects cooperates, and on transmission shaft 1, is provided with back-moving spring 2; Back-moving spring 2 two ends are separately fixed on the opposite face up and down of transmission shaft 1 and displacement transducer body 3, to realize placing automatically reseting of inter-axle shaft 1.The mouth internal fixation has two semi-ring permanent magnets 7,10 at 1 end of transmission shaft; One of them is the N utmost point; Another is the S utmost point; Two semi-ring permanent magnets 7, being separated by through the divider wall on the sensing sense body 3 between 10 forms non-closed annular structure magnetic body, is provided with shielding iron hoop 4 in semi-ring permanent magnet 7,10 outer rims, and transmission shaft 1 rotation through band back-moving spring 2 produces changes of magnetic field.In displacement transducer body 3, be bonded with the magnet steel 8 of magnetic conduction effect, described magnet steel 8 is inside and outside corresponding with two semi-ring permanent magnets, 7,10 positions.In magnet steel 8, be provided with two orthogonal slots; In two slots, be fitted with the linear Hall integrated circuit 9 that is used to the Hall switch integrated circuit 12 that detects the variation in magnetic field and export high and low level and having+carries out the single channel linear signal output of voltage through the variation that detects magnetic field under the situation of 5V power supply power supply; Hall switch integrated circuit 12 is consistent with the height of semi-ring permanent magnet 7,10 with linear Hall integrated circuit 9; And Hall switch integrated circuit 12 is vertical each other with linear Hall integrated circuit 9; Wherein Hall switch integrated circuit 12 is in the face of the gap location of semi-ring permanent magnet 7,10; In sensor body 3, also be provided with power protecting circuit 13 and electronic switch 14; Described Hall switch integrated circuit 12, linear Hall integrated circuit 9, power protecting circuit 13 and electronic switch 14 are installed on the wiring board 5; Described power protecting circuit 13 is to be made up of surge voltage protection TVS pipe T1, the first filter capacitor C1 and High frequency filter magnetic bead F1; Surge voltage protection TVS pipe T1 is parallelly connected with the first filter capacitor C1 for the input end of power protecting circuit 13 and draw the power end 15 and the earth terminal 16 of the anti-error displacement transducer that this Hall-type single-path signal exports, and connects during use+the 5V power supply; The first High frequency filter magnetic bead F1, one termination+5V power supply, the other end are that the output terminal of power protecting circuit 13 links to each other with the input end of Hall switch integrated circuit 12 (being power pins); Hall switch integrated circuit 12 through being used to provide+electronic switch 14 of 5V working power is connected with linear Hall integrated circuit 9; Electronic switch 14 is made up of pull-up resistor R1, current-limiting resistance R2 and R3, the second filter capacitor C2 and PNP triode Q1; Linear Hall integrated circuit 9 has element on every side: the 3rd filter capacitor C3, the 4th filter capacitor C4, resistance R 4 and the second High frequency filter magnetic bead F2; The 4th filter capacitor C4 is connected with current-limiting resistance R4 parallel connection and with the second High frequency filter magnetic bead F2, and the second High frequency filter magnetic bead F2 other end is the output terminal of linear Hall integrated circuit 9 and draws the signal output part 17 of the anti-error displacement transducer of this Hall-type single-path signal output.Be provided with lead pin 11 in sensor body 3 sides, described lead pin stretches in the sensor body 3 and links to each other with wiring board 5.In sensor body 3 lower port end cap 6 is installed.
Because linear Hall integrated circuit 9 inside have signal processor and memory, possess the function that software presets the respective value of demarcating permanent magnet position and output voltage, illustrate:
Suppose that linear Hall integrated circuit 9 has+the original state position in 5V working power when work, the output voltage that presets of displacement transducer is+0.4V.
Linear Hall integrated circuit 9 position of starting working: when displacement transducer is correct; In these position switch type Hall integrated circuit 12 output low levels; Electronic switch 14 conductings, linear Hall integrated circuit 9 obtain+work of 5V working power, and the output voltage that presets of this position displacement sensor is+0.5V.
The final state position: the permanent magnet 7,10 in the displacement transducer is through transmission shaft 1 rotatable final position.The output voltage that presets of this position displacement sensor is+4.5V.So linear Hall integrated circuit 9 correctly obtaining+and the output voltage that presets in the whole working range of 5V working power is+0.5-+4.5V.
When displacement transducer is worked under correct status, drive two semi-ring permanent magnets 7,10 through the transmission shaft 1 of being with back-moving spring 2 and rotatablely move simultaneously.During original state, Hall switch integrated circuit 12 is through detecting magnetic field output+5V voltage, electronic switch 14 not conductings this moment, thus linear Hall integrated circuit 9 is exported because of the nothing+5V power supply no-voltage signal of not working.When two semi-ring permanent magnets 7,10 rotate to the angle of setting through transmission shaft 1; The magnetic field that changes makes 12 conductings of Hall switch integrated circuit and is output as low level; And this low level begins continuously effective to the whole changes of magnetic field process that rotates to final position from this set angle, promptly is output as low level always.This low level makes electronic switch 14 conductings ,+5V power supply through electronic switch 14 make linear Hall integrated circuit 9 obtain+the 5V working power starts working.In the position of this set angle (be linear Hall integrated circuit 9 start working position); Linear Hall integrated circuit 9 is through detecting magnetic field output+0.5V voltage; Then through the variation that detects rotating magnetic field produce linear change+output of 0.5-+4.5V voltage, the variation of this voltage is the operating condition through ECU (ECU) detection change operational outfit then.
When displacement transducer carries out work under non-correct status, will realize following mistake proofing:
1. when output signal and+5V power supply take place fault or self the detection magnetic field of short circuit are output as high level all the time mutually in Hall switch integrated circuit 12 self; Electronic switch 14 can conducting; Linear Hall integrated circuit 9 can't obtain+the 5V working power, and displacement transducer is not worked and the output of no-voltage signal.
2. when output signal and ground wire take place fault or self the detection magnetic field of short circuit are output as low level all the time mutually in Hall switch integrated circuit 12 self, electronic switch 14 conducting always, linear Hall integrated circuit 9 has+the 5V working power always.In this case, when displacement transducer is firm when working on power, ECU detects displacement transducer to be had+0.4V voltage or the output of other magnitudes of voltage, then decision bits displacement sensor fault.
3. when magnetic field certain variation has taken place during at initial position; Displacement transducer just obtains+when the 5V working power is not also carried out the angle rotation; The output signal of Hall switch integrated circuit 12 is low level, then electronic switch 14 conductings, and linear Hall integrated circuit 9 has+the 5V working power.In this case, ECU detects displacement transducer to be had+0.4V or the output of other magnitudes of voltage, then decision bits displacement sensor fault.
4. when magnetic field certain variation has taken place in the process of initial position or rotation change; When causing the arbitrarily angled rotation of displacement transducer in travel range; The output signal of Hall switch integrated circuit 12 is high level; Then electronic switch 14 not conductings always, linear Hall integrated circuit 9 do not have always+5V working power and the output of no-voltage signal.
5. when electronic switch 14 caused under any circumstance all not conductings owing to breaking down, then linear Hall integrated circuit 9 did not have+the 5V working power always, the output of displacement transducer no-voltage signal.
6. when electronic switch 14 caused under any circumstance all conductings owing to breaking down, then linear Hall integrated circuit 9 had+the 5V working power always.In this case, when sensor is firm when working on power, ECU has detected+0.4V or the output of other magnitudes of voltage, then determine sensor fault.
7. when linear Hall integrated circuit 9 self take place output signal and ground wire mutually short circuit fault or when self detecting magnetic field and being output as low level all the time, sensor is always 0V voltage and exports.In this case, ECU detects this voltage, the control action of then not being correlated with.
8. when linear Hall integrated circuit 9 self take place output signal and+5V power supply mutually short circuit fault or when self detecting magnetic field and being output as high level all the time, displacement transducer is always+voltage of 5V exports.In this case, ECU detects this voltage, then decision bits displacement sensor fault.
Claims (4)
1. the anti-error displacement transducer of Hall-type single-path signal output; Comprise a displacement transducer body; In the displacement transducer body, be placed with reducible transmission shaft; It is characterized in that: on transmission shaft, be fixed with by two semi-ring permanent magnets and form non-closed annular structure magnetic body; One of them is the N utmost point, another is the S utmost point; At the sensor body internal fixation magnet steel is arranged, described magnet steel is inside and outside corresponding with two semi-ring permanent magnet positions, in magnet steel, is provided with the linear Hall integrated circuit that is used to Hall switch integrated circuit that detects the variation in magnetic field and export high and low level and the single channel linear signal output of carrying out voltage; The vertical each other and Hall switch integrated circuit of described Hall switch integrated circuit and linear Hall integrated circuit is faced the gap location of two semi-ring permanent magnets; In the displacement transducer body, also be provided with power protecting circuit and electronic switch, the output terminal of power protecting circuit links to each other with the input end of Hall switch integrated circuit, and the Hall switch integrated circuit is connected with the linear Hall integrated circuit through the electronic switch that is used to provide working power; And the electronic switch conducting provides working power during Hall switch integrated circuit output low level; Not conducting of electronic switch does not provide working power during Hall switch integrated circuit output high level, and the input end of power protecting circuit is the power end and the earth terminal of this anti-error displacement transducer, and the output terminal of linear Hall integrated circuit is the signal output part of this anti-error displacement transducer.
2. the anti-error displacement transducer of Hall-type single-path signal output according to claim 1, it is characterized in that: described Hall switch integrated circuit is consistent with two semi-ring permanent magnet height with the linear Hall integrated circuit.
3. the anti-error displacement transducer of Hall-type single-path signal output according to claim 1, it is characterized in that: described power protecting circuit, Hall switch integrated circuit, electronic switch and linear Hall integrated circuit are installed on the wiring board.
4. the anti-error displacement transducer of Hall-type single-path signal output according to claim 3; It is characterized in that: described Hall switch integrated circuit and linear Hall integrated circuit are positioned at the wiring board one side, and power protecting circuit and electronic switch are positioned at the wiring board another side.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101702802A CN101832749B (en) | 2010-05-08 | 2010-05-08 | Anti-error displacement transducer for Hall-type single-path signal output |
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| CN2010101702802A CN101832749B (en) | 2010-05-08 | 2010-05-08 | Anti-error displacement transducer for Hall-type single-path signal output |
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| CN101832749A CN101832749A (en) | 2010-09-15 |
| CN101832749B true CN101832749B (en) | 2012-02-08 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104282071B (en) * | 2013-07-03 | 2019-02-15 | 北京嘉岳同乐极电子有限公司 | A kind of sensor |
| CN104282072B (en) * | 2013-07-03 | 2019-02-15 | 北京嘉岳同乐极电子有限公司 | Magnetic modulating device and Magnetic Sensor |
| CN106411307A (en) * | 2016-10-26 | 2017-02-15 | 陕西法士特齿轮有限责任公司 | Non-contact electronic neutral and reverse gear switch |
| CN112284423B (en) * | 2020-10-15 | 2022-11-29 | 湖南三一智能控制设备有限公司 | Hall sensor, handle and control method of Hall sensor |
| CN116543053B (en) * | 2023-07-05 | 2023-09-08 | 南京中旭电子科技有限公司 | Hall sensor production method and production system |
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| EP1452828B1 (en) * | 2003-02-28 | 2006-04-26 | SICK STEGMANN GmbH | Multiturn rotary encoder |
| CN201345641Y (en) * | 2008-12-11 | 2009-11-11 | 梁贝 | Constraining power controller |
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Effective date of registration: 20170316 Address after: 121000 Jinzhou Development Zone, Bohai, No. Main Street, No. 4, No. 15 Patentee after: Jinzhou Haike Automobile Electronics Co Ltd Address before: 121000 Liaoning, Taihe District, Jinzhou City, West Main Street, No. 56 Patentee before: Jinzhou Hivron Auto Electronics Company Ltd. |
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Granted publication date: 20120208 Termination date: 20170508 |