CN103453916B - A kind of direction is from judging odometer - Google Patents
A kind of direction is from judging odometer Download PDFInfo
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- CN103453916B CN103453916B CN201310418249.XA CN201310418249A CN103453916B CN 103453916 B CN103453916 B CN 103453916B CN 201310418249 A CN201310418249 A CN 201310418249A CN 103453916 B CN103453916 B CN 103453916B
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- odometer
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Abstract
The invention discloses a kind of direction from judging odometer, comprising: Hall element (2), magnet steel (3), with door chip (4), single-chip microcomputer (5), interrupt response module (6), discriminating direction module (7), counting module (8) and communication module (9).Multiple Hall element (2) is evenly distributed on wheel (1) axle center circumferentially.Along with wheel (1) rotates, many Hall elements (2) produce periodic pulse signal.Interrupt response module (6) call direction discrimination module (7) obtains the motion state of wheel, coordinates counting module (8) and communication module (9) to realize the direction of odometer from arbitration functions simultaneously.The invention solves the problem that vehicle-mounted odometer independently can not provide carrier movement direction, achieve carrier movement direction from judging, principle is simple, be easy to realize, with low cost, flexible working mode, can be applied in automotive positioning system.
Description
Technical field
The present invention relates to a kind of odometer, particularly a kind of direction is from judging odometer.
Background technology
In vehicle mounted guidance application, often adopt odometer as the speed pickup of carrier, for the velocity estimation of carrier.Existing odometer is made up of multiple magnet steel and a Hall element, and multiple magnet steel is evenly distributed in axletree center circumferential, and Hall element is relative with the circumference of distribution magnet steel, for the rotation of perception wheel, exports umber of pulse.But existing odometer can not judge the rotation direction of wheel, be difficult to determine that the motion state of carrier advances or retreats, bring difficulty to navigation reckoning.In actual applications, needing the gear signal relying on vehicle for judging that the advance of vehicle still retreats, certainly judging of odometer direction can not be realized.
Summary of the invention
The object of the present invention is to provide a kind of direction certainly to judge odometer, solve existing odometer and can only export umber of pulse, need to rely on gear signal and differentiate the motion state that vehicle advances or retreats, certainly can not judge the problem of the rotation direction of wheel.
A kind of direction, from judging odometer, comprising: Hall element and magnet steel, also comprise: with door chip, single-chip microcomputer, interrupt response module, discriminating direction module, counting module and communication module.Interrupt response module, discriminating direction module, counting module and communication module are placed in single-chip microcomputer inside.The function of interrupt response module is: also call direction discrimination module, counting module or communication module process to carry out judgement to external interrupt and communicating interrupt; The function of discriminating direction module is: differentiate the advance of wheel or retrogressing; The function of counting module is: the motion conditions paired pulses according to wheel carries out cumulative calculation; The function of communication module is: odometer umber of pulse is sent to navigational computer.
Multiple Hall element is evenly distributed on axletree center circumferentially; Magnet steel is arranged on the right opposite of Hall element place circumference, and the requirement of mounting distance is make just to be within the scope of field region to the Hall element of magnet steel; Be numbered according to clockwise or counter-clockwise Hall element, the output terminal of Hall element is connected with the input end of door chip; Be connected with the interrupt response input end of single-chip microcomputer with the output terminal of door chip; Hall element accesses on I/O mouth corresponding to single-chip microcomputer according to label order successively, for detecting pulse change order.
Direction is in time judging that odometer works, and Hall element is along with vehicle wheel rotation.When certain Hall element is near magnet steel, Hall element is within the scope of field region, produces level change, just exports digital pulse signal.Digital pulse signal triggers the interruption of single-chip microcomputer, and it is after external interrupt that interrupt response module determines, and call direction discrimination module, to port level detection, determines the Hall element numbering be in magnetic field range.Wheel often rotates one week, and generating period changes by magnetic field, makes the output also generating period change of Hall element.By the order to the change of Hall element numbering, determine that the motion state of carrier advances or retreats, realize certainly judging of direction of motion.Afterwards, the counting module in single-chip microcomputer carries out counting according to direction of motion number of pulses and adds up.Under single-chip microcomputer is operated in timed sending pattern or interrupt inquiry pattern, by communication module control RS232 or spi bus, the umber of pulse of odometer and carrier movement directional information are sent to navigational computer.
The invention solves the problem that vehicle-mounted odometer independently can not provide carrier movement direction, achieve carrier movement direction from judging, principle is simple, be easy to realize, with low cost, flexible working mode, can be applied in automotive positioning system.
Accompanying drawing explanation
A kind of direction of Fig. 1 is from the schematic diagram judging odometer.
1. wheel 2. Hall element 3. magnet steel 4. and door chip 5. single-chip microcomputer 6. interrupt response module
7. discriminating direction module 8. counting module 9. communication module.
Embodiment
A kind of direction, from judging odometer, comprising: Hall element (2) and magnet steel (3), also comprise: with door chip (4), single-chip microcomputer (5), interrupt response module (6), discriminating direction module (7), counting module (8) and communication module (9).Interrupt response module (6), discriminating direction module (7), it is inner that counting module (8) and communication module (9) are placed in single-chip microcomputer (5).The function of interrupt response module (6) is: also call direction discrimination module (7), counting module (8) or communication module (9) process to carry out judgement to external interrupt and communicating interrupt; The function of discriminating direction module (7) is: differentiate the advance of wheel (1) or retrogressing; The function of counting module (8) is: the motion conditions paired pulses according to wheel (1) carries out cumulative calculation; The function of communication module (9) is: odometer umber of pulse is sent to navigational computer.
Multiple Hall element (2) is evenly distributed on wheel (1) axle center circumferentially; Magnet steel (3) is arranged on the right opposite of Hall element (2) place circumference, and the requirement of mounting distance is just within the scope of field region to the Hall element (2) of magnet steel (3) for making; Hall element (2) is numbered according to clockwise or counter-clockwise:
,
,
,
, the output terminal of Hall element (2) is connected with the input end of door chip (4); Be connected with the interrupt response input end of single-chip microcomputer (5) with the output terminal of door chip (4); Hall element (2) accesses on I/O mouth corresponding to single-chip microcomputer (5) according to label order successively, for detecting pulse change order.
Direction is in time judging that odometer works, and Hall element (2) is along with wheel (1) rotation.When certain Hall element (2) is near magnet steel (3), Hall element (2) is within the scope of field region, produces level change, just exports digital pulse signal.Digital pulse signal triggers the interruption of single-chip microcomputer (5), and it is after external interrupt that interrupt response module (6) determines, and call direction discrimination module (7), to port level detection, determines Hall element (2) numbering be in magnetic field range.Wheel (1) often rotates one week, and generating period changes by magnetic field, makes the output also generating period change of Hall element (2).By the order to the change of Hall element (2) numbering, determine that the motion state of carrier advances or retreats, realize certainly judging of direction of motion.When being numbered
hall element (2) when entering magnetic field, on the I/O mouth of single-chip microcomputer (5), level is " 1110 ".By that analogy, if when level change is followed successively by " 1110 ", " 1101 ", " 1011 ", " 0111 " on the I/O mouth of single-chip microcomputer (5), can judge that wheel (1) is as rotating counterclockwise; If when level change is followed successively by " 1110 ", " 0111 ", " 1011 ", " 1101 " on the I/O mouth of single-chip microcomputer (5), can judge that wheel (1) is as rotating clockwise, thus the direction realizing odometer judges certainly.Afterwards, the counting module (8) in single-chip microcomputer (5) carries out counting according to direction of motion number of pulses and adds up.Under single-chip microcomputer (5) is operated in timed sending pattern or interrupt inquiry pattern, by communication module (9) control RS232 or spi bus, the umber of pulse of odometer and carrier movement directional information are sent to navigational computer, realizes direction from the repertoire judging odometer.
Claims (1)
1. a direction is from judging odometer, comprise: Hall element (2) and magnet steel (3), characterized by further comprising: with door chip (4), single-chip microcomputer (5), interrupt response module (6), discriminating direction module (7), counting module (8) and communication module (9); Interrupt response module (6), discriminating direction module (7), it is inner that counting module (8) and communication module (9) are placed in single-chip microcomputer (5); The function of interrupt response module (6) is: also call direction discrimination module (7), counting module (8) or communication module (9) process to carry out judgement to external interrupt and communicating interrupt; The function of discriminating direction module (7) is: differentiate the advance of wheel (1) or retrogressing; The function of counting module (8) is: the motion conditions paired pulses according to wheel (1) carries out cumulative calculation; The function of communication module (9) is: odometer umber of pulse and carrier movement directional information are sent to navigational computer;
Multiple Hall element (2) is evenly distributed on wheel (1) axle center circumferentially; Magnet steel (3) is arranged on the right opposite of Hall element (2) place circumference, and the requirement of mounting distance is just within the scope of field region to the Hall element (2) of magnet steel (3) for making; Be numbered according to clockwise or counter-clockwise Hall element (2), the output terminal of Hall element (2) is connected with the input end of door chip (4); Be connected with the interrupt response input end of single-chip microcomputer (5) with the output terminal of door chip (4); Hall element (2) accesses on I/O mouth corresponding to single-chip microcomputer (5) according to label order successively, for detecting pulse change order;
Direction is in time judging that odometer works, and Hall element (2) is along with wheel (1) rotation; When certain Hall element (2) is near magnet steel (3), Hall element (2) is within the scope of field region, produces level change, just exports digital pulse signal; Digital pulse signal triggers the interruption of single-chip microcomputer (5), it is after external interrupt that interrupt response module (6) determines, call direction discrimination module (7), to port level detection, determines Hall element (2) numbering be in magnetic field range; Wheel (1) often rotates one week, and generating period changes by magnetic field, makes the output also generating period change of Hall element (2); By the order of Hall element (2) numbering change, determine that the motion state of carrier advances or retreats, realize certainly judging of direction of motion; Afterwards, the counting module (8) in single-chip microcomputer (5) carries out counting according to direction of motion number of pulses and adds up; Under single-chip microcomputer (5) is operated in timed sending pattern or interrupt inquiry pattern, by communication module (9) control RS232 or spi bus, the umber of pulse of odometer and carrier movement directional information are sent to navigational computer.
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| CN201310418249.XA CN103453916B (en) | 2013-09-16 | 2013-09-16 | A kind of direction is from judging odometer |
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| CN201310418249.XA CN103453916B (en) | 2013-09-16 | 2013-09-16 | A kind of direction is from judging odometer |
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| CN103453916A CN103453916A (en) | 2013-12-18 |
| CN103453916B true CN103453916B (en) | 2016-01-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128029A (en) * | 2016-08-19 | 2016-11-16 | 公安部交通管理科学研究所 | Trailer-type scene of the accident vehicle break-in warning system |
| CN108761477B (en) * | 2018-07-27 | 2023-12-19 | 成都磁海电气工程有限公司 | Non-contact network parameter acquisition device, measurement system and measurement method adopting digital laser technology |
| CN110779489B (en) * | 2019-10-17 | 2021-08-13 | 中国航空工业集团公司洛阳电光设备研究所 | Device and method for measuring rotation state of rotating protective cover by using double sensors |
| CN111928871B (en) * | 2020-09-15 | 2021-03-09 | 深圳大学 | Precision magnetic Hall odometer |
| CN114508992A (en) * | 2022-02-22 | 2022-05-17 | 国网上海市电力公司 | Method for accurately measuring position of pipeline |
| CN114609406A (en) * | 2022-03-28 | 2022-06-10 | 杭州电子科技大学 | Hall strip-based moving object quantity and speed measuring method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86211048U (en) * | 1986-12-30 | 1988-02-24 | 南京汽车制造厂 | Speed dometer for bidirectional running vehicle |
| JP2005257489A (en) * | 2004-03-12 | 2005-09-22 | Zenrin Co Ltd | Portable apparatus for altitude measurement |
| CN102393208A (en) * | 2011-10-20 | 2012-03-28 | 奇瑞汽车股份有限公司 | Mile detection device |
| CN203083578U (en) * | 2013-02-21 | 2013-07-24 | 安徽长丰扬子汽车制造有限责任公司 | Instructional car odometer |
-
2013
- 2013-09-16 CN CN201310418249.XA patent/CN103453916B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86211048U (en) * | 1986-12-30 | 1988-02-24 | 南京汽车制造厂 | Speed dometer for bidirectional running vehicle |
| JP2005257489A (en) * | 2004-03-12 | 2005-09-22 | Zenrin Co Ltd | Portable apparatus for altitude measurement |
| CN102393208A (en) * | 2011-10-20 | 2012-03-28 | 奇瑞汽车股份有限公司 | Mile detection device |
| CN203083578U (en) * | 2013-02-21 | 2013-07-24 | 安徽长丰扬子汽车制造有限责任公司 | Instructional car odometer |
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