CN85205153U - Speedometer for bicycle - Google Patents
Speedometer for bicycle Download PDFInfo
- Publication number
- CN85205153U CN85205153U CN 85205153 CN85205153U CN85205153U CN 85205153 U CN85205153 U CN 85205153U CN 85205153 CN85205153 CN 85205153 CN 85205153 U CN85205153 U CN 85205153U CN 85205153 U CN85205153 U CN 85205153U
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- CN
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- Prior art keywords
- speed
- magnet
- electromagnetic transducer
- utility
- skin
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The utility model relates to a speed detector for spoke cars in particular to bicycles. The utility model comprises a couple of magnets which are symmetrically arranged on a rear wheel shaft husk, an electromagnetic transducer which is composed by an iron core coil and is arranged on a back wheel fork, a rectifying and filtering current limiting circuit and a speed indicator which is composed of a direct current meter. The utility model has the advantages of simple structure, non energy consumption, convenient installation and accurate speed detecting, which can be arranged on the bicycles with difference wheel diameters.
Description
The present invention relates to a kind of speed measuring device of spoke vehicle, particularly bicycle speed.
The existing practical application for many years of the speed measuring device of bicycle running speed, the pattern from speed detects roughly has three kinds of modes, mechanical transmission-type, opto-electronic conversion formula and electromagnetism transducing formula.The mechanicalness speed measuring device has increased frictional resistance owing to increased extra weight or pressure on wheel.The opto-electronic conversion velocity-measuring system as United States Patent (USP) 4.156.190, is to adopt light emitting diode and phototransistor, utilizes valve cock to cut off the number of times of light beam and counts speed, and this system is subject to the influence of rub-out signal.The electromagnetic conversion speed counting device is to utilize the mutual motion generation speed of magnet and coil to detect output signal and count speed, United States Patent (USP) 3.898.563.What describe is on the wheel spoke polylith magnet to be installed, and sticks the system that inductive coil is installed at wheel, and this system can increase the drag and the moment of inertia of wheel.The system that mentions among the United States Patent (USP) 4.007.419 is installed in a plurality of magnet on the drive sprocket, and coil still is installed in wheel and sticks, and this can produce top problem equally.United States Patent (USP) 4.352.063 adopts the non-contact type electromagnetic transducer, has overcome the shortcoming that increases additional weight and cause unnecessary drag and moment of inertia on wheel.Respectively there are being its characteristics in above system aspect the output signal of processing speed detection, but because their functions are many, circuit is comparatively complicated in general, used element is also many, and some also adopts numeral to show, so cost is higher, need energy consumption, often be confined to the sports field and use, be difficult to promote.
The objective of the invention is to provide a kind of improved electromagnetic conversion formula simple and easy speed counting device, this apparatus function is single, does not need outside resources, and circuit is simple, and is with low cost, easy for installation.
Invention is achieved in that installs two blocks of magnet symmetrically on the hind axle skin, and an iron-core coil is installed on rear wheel fork, so just constituted electromagnetic transducer, when wheel, be installed in magnet on the hind axle skin also with wheel, coil moves in magnetic field, cutting magnetic line, producing output signal is induction current, the induction current of this alternation is through rectification, the filtering current limliting needle deflection with rear drive DC ammeter gauge outfit, the speed display gauge head of drawing through measuring and calibrating, the indication of its pointer is the travel speed of bicycle.Therefore, when the spacing distance that guarantees coil and magnet was the best, this speed per hour meter can reach higher degree of accuracy.
The present invention only adopts two blocks of magnet to be installed on the hind axle skin, and it is very near from the axle center, the drag and the moment of inertia of wheel have so just been reduced, owing to utilized the primary energy of electromagnetism transducing, saved power supply, speed shows the DC ammeter gauge outfit that employing is commonly used, thereby intuitive display, speed observer is obvious, and the used element of entire circuit seldom and be easy to get, make with low cost, easy for installation.
The concrete structure of invention is provided by following accompanying drawing.
Fig. 1 is the synoptic diagram of speed per hour counter device installation site on bicycle of proposition according to the present invention.
Fig. 2 is a speed per hour meter circuit diagram.
Fig. 3 is the relevant position figure that magnet and iron-core coil are installed.
This speed per hour counter device comprises two magnet (7) and iron-core coils (3) that are installed on the rear wheel fork (5) of being installed on the rear vehicle shaft skin (6), and a speed instruction sheet (1) that is installed on the handlebar.Said magnet (7) is embedded on the axle skin overcoat made from non-magnet_conductible material (4) symmetrically, and this overcoat is fixed on the skin (6), is connected by lead (2) with speed instruction sheet with the electromagnetic transducer that (3) constitute by (7).Rectification is housed in speed instruction sheet, the filtering current-limiting circuit, and connect one and half variable calibration potentiometers, be used for accurate calibration.
Embodiment:
Select two diameter 10mm for use, the permanent magnet of thickness 10mm, it is embedded in the axle skin that makes with plastics symmetrically puts outward, axle skin overcoat jackscrew is fixed on the hind axle skin, and iron-core coil is selected the cast iron core for use, forms with the high strength insulating varniss envelope curve coiling of diameter 0.8mm, the number of turn is 6000, iron-core coil macerated to be installed on the rear wheel fork after the encapsulation, makes during installation that magnet, coil are 20mm with the distance in axle center separately, and the distance of magnet and coil is 3mm.Speed instruction sheet adopts the 69C6 model, the DC ammeter of 100 μ A, and interior wiring road connects as shown in Figure 2, wherein D
1-D
4Be 2Ap9, W
1=1K, W
2=3.3K, C=1000 μ F/16V, the circuit part of coil with lead and indicating gauge coupled together.At the bicycle of different wheel diameter, can be by half variable calibration potentiometer W in the speed per hour meter circuit
2Carry out the precision calibration, after calibration finishes, shut, around gauge outfit, load onto beam, to reduce owing to body vibrations causes error through sealing wax.This speed per hour meter proves that through the application of 2 wheat harvesting periods anti-seismic performance is good, has desirable degree of accuracy.
Claims (2)
1, the speed measuring device that is used for spoke vehicle, particularly bicycle speed, this device comprise the velocity indicator that the electromagnetic transducer that is made of magnet and inductive coil and circuit and indication gauge outfit constitute, and it is characterized in that:
A, described electromagnetic transducer comprise two magnet (7) and iron-core coils (3) that are installed on the rear wheel fork (5) of being installed on the rear vehicle shaft skin (6).
B, described velocity indicator (1) receive output signal from electromagnetic transducer, are made up of rectification, filtering current-limiting circuit, and employing DC ammeter gauge outfit is directly indicated speed.
C, described electromagnetic transducer and speed instruction sheet are connected by lead (2).
2, device according to claim 1, it is characterized in that two blocks of magnet are embedded on axle skin overcoat (4) that makes with non-magnet_conductible material symmetrically, this overcoat is fixed on the rear vehicle shaft skin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85205153 CN85205153U (en) | 1985-11-30 | 1985-11-30 | Speedometer for bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85205153 CN85205153U (en) | 1985-11-30 | 1985-11-30 | Speedometer for bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85205153U true CN85205153U (en) | 1986-08-13 |
Family
ID=4800293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85205153 Ceased CN85205153U (en) | 1985-11-30 | 1985-11-30 | Speedometer for bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85205153U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434921C (en) * | 2005-06-02 | 2008-11-19 | 株式会社岛野 | Bicycle motion sensing arrangement |
| CN106290966A (en) * | 2016-07-21 | 2017-01-04 | 柳州正高科技有限公司 | A kind of bicycle speed monitor and alarm system and control method |
| CN106290964A (en) * | 2016-07-21 | 2017-01-04 | 柳州正高科技有限公司 | A kind of vehicle slowdown monitoring system and control method |
| CN106290963A (en) * | 2016-07-21 | 2017-01-04 | 柳州正高科技有限公司 | Vehicle slowdown monitoring system and control method |
-
1985
- 1985-11-30 CN CN 85205153 patent/CN85205153U/en not_active Ceased
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434921C (en) * | 2005-06-02 | 2008-11-19 | 株式会社岛野 | Bicycle motion sensing arrangement |
| CN106290966A (en) * | 2016-07-21 | 2017-01-04 | 柳州正高科技有限公司 | A kind of bicycle speed monitor and alarm system and control method |
| CN106290964A (en) * | 2016-07-21 | 2017-01-04 | 柳州正高科技有限公司 | A kind of vehicle slowdown monitoring system and control method |
| CN106290963A (en) * | 2016-07-21 | 2017-01-04 | 柳州正高科技有限公司 | Vehicle slowdown monitoring system and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |