CN202794214U - Photoelectric device based bicycle speed measurement device - Google Patents
Photoelectric device based bicycle speed measurement device Download PDFInfo
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- CN202794214U CN202794214U CN 201220480171 CN201220480171U CN202794214U CN 202794214 U CN202794214 U CN 202794214U CN 201220480171 CN201220480171 CN 201220480171 CN 201220480171 U CN201220480171 U CN 201220480171U CN 202794214 U CN202794214 U CN 202794214U
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- measuring device
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Abstract
The utility model relates to a photoelectric device based bicycle speed measurement device. A photodiode (PD) and a light-emitting diode (LED) are fixed on the same side of a front fork of a bicycle in an up-and-down mode through double locking sleeve supports, a small reflecting mirror is fixed on a wheel spoke, light which is emitted by the LED towards the inclined upper side is reflected to the PD which is located above through the small reflecting mirror, PD signals are sent into a single chip microcomputer, the single chip microcomputer calculates the speed per hour and mileage data which are sent to a liquid crystal display for displaying, and a battery pack supplies electricity to the single chip microcomputer. According to the design, the high responsivity and the small temperature excursion characteristic of the LED element and the PD element are used fully, and the power consumption is low. Compared with the widely-used method that a Hall technology is used for measuring the speed, the device is high in precision, stable in performance and capable of solving the problem that the precision is reduced due to the Hall technology on the condition of the high speed.
Description
Technical field
The utility model relates to a kind of speed measuring device, particularly a kind of bicycle speed measuring device based on photoelectric device.
Background technology
The principle of bicycle speed measurement is divided into two classes basically at present.One class is by Mechanical Contact, and the rotation of wheel is delivered to the rotation of small generator, judges current rotating speed by the magnitude of voltage size of generator.This mode precision is very low, and the defective day before yesterday of contact measurement is exactly that loss is serious, and small generators is easy to burn out under high-intensity work, and non-watertight.Another kind of is the speed measuring device that designs by hall principle, and Hall element is the outwards a series of pulses of output under the cutting in magnetic field.This technical costs is lower, but the Hall element temperature is floated the serious and output nonlinear of phenomenon.
Summary of the invention
The utility model is for the Hall element problem that precision can descend when testing the speed at a high speed, has proposed a kind of bicycle speed measuring device based on photoelectric device, has adopted photoelectric technology and singlechip technology, and it is stable to test the speed, and precision is high.
The technical solution of the utility model is: a kind of bicycle speed measuring device based on photoelectric device, PD photosensitive tube and LED luminotron are fixed in up and down the same side of bicycle front fork by twin-lock cover support, a small reflector is fixed on the vehicle wheel spoke, the light that the LED luminotron sends obliquely upward reflexes to the PD photosensitive tube that is positioned at the top through small reflector, PD photosensitive tube signal is sent into single-chip microcomputer, single-chip microcomputer calculates speed per hour and mileage number data liquor charging crystal display screen shows, electric battery is powered to single-chip microcomputer.
Described PD photosensitive tube is with a light shield, and the light shield breach is downward.Described small reflector can be fixed on any spoke, forms an angle with spoke, can make LED luminotron light by after the small reflector reflection, and light enters the PD photosensitive tube from PD photosensitive tube below.
Described LED luminotron is selected white light or ruddiness high brightness, the luminous led chip of low-angle.
The optional photoelectric cell group of described electric battery, simultaneously adapted dry cell batteries.
The beneficial effects of the utility model are: the utility model is based on the bicycle speed measuring device of photoelectric device, and design takes full advantage of high responsiveness and the little temperature of LED and PD element and floats characteristic, and power consumption is lower.Use and utilize widely the Hall technology to realize that the mode precision that tests the speed is higher, overcome the Hall technology and can cause precise decreasing under high-speed case, performance is more stable.
Description of drawings
Fig. 1 is that the utility model is based on the bicycle speed measuring device wheel synoptic diagram of photoelectric device;
Fig. 2 is that the utility model is based on the bicycle speed measuring device structural representation sketch of photoelectric device;
Fig. 3 is that the utility model is based on PD photosensitive tube structural representation in the bicycle speed measuring device of photoelectric device;
Fig. 4 is that the utility model is based on the bicycle speed measuring device fundamental diagram of photoelectric device;
Fig. 5 is that the utility model is based on another example structure simplified schematic diagram of bicycle speed measuring device of photoelectric device;
Fig. 6 is that the utility model is based on the bicycle speed measuring device workflow diagram of photoelectric device.
Embodiment
Load onto a small reflector 2 at cycle wheel 1 spoke as shown in Figure 1, based on the bicycle speed measuring device structural representation of photoelectric device, LED luminotron 5 and PD photosensitive tube 4 are fixed in the same side of bicycle front fork 3 by twin-lock cover support as shown in Figure 2.Both leave certain distance, and wherein LED luminotron 5 is near wheel 1 axis place, obliquely upward emission of light.A small reflector 2 is fixed on the spoke of wheel, and wheel whenever turns over a circle, and the light that LED luminotron 5 sends is just injected in the PD photosensitive tube 4 of front fork top once by small reflector anti-2.LED luminotron 5 is selected white light or ruddiness high brightness, the luminous led chip of low-angle.The angle of the installation of these three devices is more accurate, arrives PD photosensitive tube 4 places so that the luminous energy direct projection of LED luminotron 5 enters the light shield 9 of PD photosensitive tube 4.Wherein PD photosensitive tube 4 is with a light shield 9, and breach is downward, PD photosensitive tube structural representation as shown in Figure 3, and this design considers that daytime daylight is stronger, surround lighting may make PD photosensitive tube 4 reach capacity and can't use.Add light shield 9 mechanisms and make PD photosensitive tube 4 carrier openings downward-sloping, can make surround lighting drop to minimum on the impact of PD photosensitive tube 4 precision.Fundamental diagram as shown in Figure 4, just the rotation information of wheel 1 has been changed into one by one light pulse by this device, light pulse has further changed into electric pulse and has been transported in the single-chip microcomputer 7, process, the speed per hour of calculating after single-chip microcomputer 7 is processed and mileage liquor charging crystal display screen 8 show, electric battery 6 gives single-chip microcomputer 7 power supplies, electric battery 6 optional photoelectric cell assembly dry cell batteries, available light electric battery when fine; Then can adopt the dry cell batteries power supply at cloudy day or night.
Another example structure simplified schematic diagram as shown in Figure 5, small reflector 2 can be fixed on any spoke, and angle has marked deviation angle a little on the upper side among the figure, with the setting angle relation.Be fixed on the spoke with clasp, incident light upwards incided in the PD photosensitive tube 4 after the purpose of design was to make as far as possible LED luminotron 5 light by small reflector 2 reflections like this, opening on PD photosensitive tube 4 supports can be towards the below, make the strong surround lighting in top drop to minimum on the impact of PD, improve precision, PD photosensitive tube 4 is reached capacity.
Workflow diagram as shown in Figure 6, we will produce an electric pulse by known wheel revolution one circle, and rotating speed is higher so, and the mistiming between adjacent two electric pulses is less, by the pulse sum of digit in the time, can obtain the unit interval wheel and turn several circles.And the diameter of cycle hub has standard basically, and namely the girth of wheel hub can obtain easily.Be the number of turns according to V=NC/T(N, C is the wheel circumference) can obtain real-time speed.A counter is set in Single Chip Microcomputer (SCM) system again, and the N value of count enable from start namely obtained total kilometres.
Claims (5)
1. bicycle speed measuring device based on photoelectric device, it is characterized in that, PD photosensitive tube (4) and LED luminotron (5) are fixed in up and down the same side of bicycle front fork by twin-lock cover support, a small reflector (2) is fixed on the vehicle wheel spoke, the light that LED luminotron (5) sends obliquely upward reflexes to the PD photosensitive tube (4) that is positioned at the top through small reflector (2), PD photosensitive tube (4) signal is sent into single-chip microcomputer, single-chip microcomputer calculates speed per hour and mileage number data liquor charging crystal display screen shows, electric battery is powered to single-chip microcomputer.
2. described bicycle speed measuring device based on photoelectric device according to claim 1 is characterized in that described PD photosensitive tube (4) is with a light shield (9), and light shield (9) breach is downward.
3. described bicycle speed measuring device based on photoelectric device according to claim 2, it is characterized in that, described small reflector (2) can be fixed on any spoke, form an angle with spoke, after can making LED luminotron (5) light by small reflector (2) reflection, light enters PD photosensitive tube (4) from PD photosensitive tube (4) below.
4. described bicycle speed measuring device based on photoelectric device according to claim 1 is characterized in that, described LED luminotron (5) is selected white light or ruddiness high brightness, the luminous led chip of low-angle.
5. described bicycle speed measuring device based on photoelectric device according to claim 1 is characterized in that, the optional photoelectric cell group of described electric battery, simultaneously adapted dry cell batteries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220480171 CN202794214U (en) | 2012-09-20 | 2012-09-20 | Photoelectric device based bicycle speed measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220480171 CN202794214U (en) | 2012-09-20 | 2012-09-20 | Photoelectric device based bicycle speed measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202794214U true CN202794214U (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220480171 Expired - Fee Related CN202794214U (en) | 2012-09-20 | 2012-09-20 | Photoelectric device based bicycle speed measurement device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202794214U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106910423A (en) * | 2017-04-10 | 2017-06-30 | 珠海格力电器股份有限公司 | Display device and air conditioning equipment |
| CN109030851A (en) * | 2018-08-31 | 2018-12-18 | 华东交通大学 | A kind of bicycle speed measuring system |
-
2012
- 2012-09-20 CN CN 201220480171 patent/CN202794214U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106910423A (en) * | 2017-04-10 | 2017-06-30 | 珠海格力电器股份有限公司 | Display device and air conditioning equipment |
| CN109030851A (en) * | 2018-08-31 | 2018-12-18 | 华东交通大学 | A kind of bicycle speed measuring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20130920 |