CN102495227A - Electric vehicle speed detection device - Google Patents
Electric vehicle speed detection device Download PDFInfo
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- CN102495227A CN102495227A CN2011104093622A CN201110409362A CN102495227A CN 102495227 A CN102495227 A CN 102495227A CN 2011104093622 A CN2011104093622 A CN 2011104093622A CN 201110409362 A CN201110409362 A CN 201110409362A CN 102495227 A CN102495227 A CN 102495227A
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- amplifying circuit
- speed
- electric motor
- motor car
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Abstract
The invention relates to a detection device, in particular to an electric vehicle speed detection device. The device comprises magnets arranged on wheels and a Hall sensor fixed on a frame and corresponding to the magnets, wherein the Hall sensor is connected with an input end of a single chip; an output end of the single chip is connected with an input end of an amplifying circuit; and an output end of the amplifying circuit is connected with a speed display instrument. Through the structure, the speed value is transmitted to a torsional spring in the magnetic field according to the voltage, and the torsional spring drives a pointer of the speed display instrument to rotate so that the speed of the electric vehicle can be displayed. The whole device has a simple structure and can automatically display the running speed of the electric vehicle.
Description
Technical field
The present invention relates to the speed detector of a kind of pick-up unit, particularly a kind of electric motor car.
Background technology
Electric motor car needs in the process of going are presented at the speed of electric motor car on the instrument timely, are convenient to the travel speed that the driver understands current electric motor car, can better control electric motor car like this.
Summary of the invention
The technical issues that need to address of the present invention provide a kind of electric motor car speed automatic detection device simple in structure.
For solving above-mentioned technical matters, electric motor car speed detector of the present invention comprises the magnet that is arranged on the wheel and is fixed on the vehicle frame and the corresponding Hall element of magnet; Said Hall element is connected with the input end of single-chip microcomputer; The output terminal of said single-chip microcomputer is connected with the input end of amplifying circuit, and the output terminal of said amplifying circuit is connected with the speed Displaying Meter.
Said amplifying circuit is the two-stage amplifying circuit, and the output terminal of first order amplifying circuit is connected with the input end of second level amplifying circuit.
The output terminal of said amplifying circuit is connected with the speed Displaying Meter and is connected with torsion spring in being arranged on magnetic field for the output terminal of amplifying circuit; Said torsion spring is connected with the pointer of speed Displaying Meter.
After adopting said structure; In the electric vehicle running process, wheel whenever turns around, and the Hall element on the vehicle frame can produce output voltage when passing through the magnet on the wheel; This moment, single-chip microcomputer will be counted, and the number of turns that obtains turning in the electric motor car unit interval just can calculate the travel speed of electric motor car.Give the torsion spring in the magnetic field with velocity amplitude by voltage transmission, the pointer that torsion spring drives the speed Displaying Meter rotates, and just can the speed of electric motor car be shown.Whole apparatus structure is simple, can show the travel speed of electric motor car automatically.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Fig. 1 is the circuit theory diagrams of electric motor car speed detector of the present invention.
Among the figure: 1 is Hall element, and 2 is single-chip microcomputer, and 3 is first triode, and 4 is second triode, and 5 is torsion spring, and 6 is speed Displaying Meter pointer
Embodiment
Electric motor car speed detector as shown in Figure 1; Comprise the magnet that is arranged on the wheel and be fixed on the vehicle frame and the corresponding Hall element 1 of magnet; In the process of electric vehicle running; The wheel revolution is crossed a circle, and Hall element 1 will pass through magnet once, will produce output voltage one time through a Hall element 1.Said Hall element 1 is connected with the input end of single-chip microcomputer 2; Hall element 1 is transferred to single-chip microcomputer 2 with the output voltage that produces; Single-chip microcomputer 2 can be counted Hall element 1 generation output voltage number of times in the unit interval, so just can obtain the number of turns that wheel turns in the unit interval.The number of turns that turns over gained unit interval wheel multiply by the distance that the girth of wheel just can obtain going in the unit interval, the i.e. speed of electric motor car.The output terminal of said single-chip microcomputer 2 is connected with the input end of amplifying circuit, and single-chip microcomputer 2 is converted into the output of correspondent voltage value with resulting velocity amplitude.Because output voltage values is less, so need output voltage be amplified through amplifying circuit.Said amplifying circuit is the two-stage amplifying circuit, and the output terminal of first order amplifying circuit is connected with the input end of second level amplifying circuit, and first order amplifying circuit and second level amplifying circuit are respectively first triode 3 and second triode 4.The collector of first triode 3 and second triode 4 links to each other, and the emitter of first triode 3 is connected with the base stage of second triode 4, has so just formed a second amplifying circuit, can the output voltage of single-chip microcomputer 2 further be amplified.
The output terminal of said amplifying circuit is connected with the speed Displaying Meter.The output terminal of said amplifying circuit is connected with the speed Displaying Meter and is connected with torsion spring 5 in being arranged on magnetic field for the output terminal of amplifying circuit; The output voltage of single-chip microcomputer 2 flows through the torsion spring 5 in the magnetic field after amplifying circuit amplifies; Can produce certain function power to torsion spring 5, said torsion spring 5 is connected with the pointer 6 of speed Displaying Meter.The amplifying voltage of single-chip microcomputer 2 outputs makes torsion spring 5 rotate with the pointer 6 of speed Displaying Meter to the acting force that torsion spring 5 produces, and reaches the purpose of display speed.The output voltage of single-chip microcomputer 2 is big more; The acting force that torsion spring 5 is produced is also just big more; The amplitude that the pointer 6 of speed Displaying Meter rotates is also just big more; Pointer 6 rotation amplitudes of the output voltage of single-chip microcomputer 2 and speed Displaying Meter have just formed corresponding relationship like this; And have corresponding relationship between the speed of the output voltage of single-chip microcomputer 2 and electric motor car, and just there is indirect corresponding relation like this between pointer 6 rotation amplitudes of the speed of electric motor car and speed Displaying Meter, the pointer of speed Displaying Meter just can well show the speed of electric motor car.
Claims (3)
1. electric motor car speed detector is characterized in that: said electric motor car speed detector comprises the magnet that is arranged on the wheel and is fixed on the vehicle frame and the corresponding Hall element of magnet; Said Hall element is connected with the input end of single-chip microcomputer; The output terminal of said single-chip microcomputer is connected with the input end of amplifying circuit, and the output terminal of said amplifying circuit is connected with the speed Displaying Meter.
2. according to the described electric motor car speed detector of claim 1, it is characterized in that: said amplifying circuit is the two-stage amplifying circuit, and the output terminal of first order amplifying circuit is connected with the input end of second level amplifying circuit.
3. according to the described electric motor car speed detector of claim 1, it is characterized in that: the output terminal of said amplifying circuit is connected with the speed Displaying Meter and is connected with torsion spring in being arranged on magnetic field for the output terminal of amplifying circuit; Said torsion spring is connected with the pointer of speed Displaying Meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104093622A CN102495227A (en) | 2011-12-10 | 2011-12-10 | Electric vehicle speed detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104093622A CN102495227A (en) | 2011-12-10 | 2011-12-10 | Electric vehicle speed detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102495227A true CN102495227A (en) | 2012-06-13 |
Family
ID=46187068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104093622A Pending CN102495227A (en) | 2011-12-10 | 2011-12-10 | Electric vehicle speed detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102495227A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483467A (en) * | 2016-09-26 | 2017-03-08 | 北京百度网讯科技有限公司 | A kind of electric vehicle state determines method and apparatus |
| CN107913042A (en) * | 2017-11-20 | 2018-04-17 | 北京小米移动软件有限公司 | Cleaning equipment and its control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201173932Y (en) * | 2008-03-24 | 2008-12-31 | 永城煤电控股集团有限公司 | Electric locomotive LCD Chinese display velocimeter |
| CN202393783U (en) * | 2011-12-10 | 2012-08-22 | 常州永旭车辆配件厂 | Electric vehicle speed detection device |
-
2011
- 2011-12-10 CN CN2011104093622A patent/CN102495227A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201173932Y (en) * | 2008-03-24 | 2008-12-31 | 永城煤电控股集团有限公司 | Electric locomotive LCD Chinese display velocimeter |
| CN202393783U (en) * | 2011-12-10 | 2012-08-22 | 常州永旭车辆配件厂 | Electric vehicle speed detection device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483467A (en) * | 2016-09-26 | 2017-03-08 | 北京百度网讯科技有限公司 | A kind of electric vehicle state determines method and apparatus |
| CN107913042A (en) * | 2017-11-20 | 2018-04-17 | 北京小米移动软件有限公司 | Cleaning equipment and its control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120613 |