TWI843339B - Photoelectric reflection speed sensor for bicycle and speed measurement method thereof - Google Patents

Abstract

The present invention is a photoelectric reflection speed sensor for a bicycle and a speed measurement method thereof. The photoelectric reflection speed sensor is arranged on a preset vehicle and includes a light source emitting module, which is arranged around a pedal axis near the preset vehicle and emits a first incident light and a second incident light, an axle reflection panel, which is arranged on the pedal axis and faces one side of the light source emitting module, and the axle reflection panel rotates with the pedal axis and continuously reflects the first incident light and the second incident light emitted by the light source emitting module, and a light sensing module, which senses the axle. The light reflected by the reflective panel is transmitted as a first pulse signal and a second pulse signal according to the number of times sensed per minute. A processor analyzes the first pulse signal and the second pulse signal to calculate the moving speed of the preset vehicle and transmits a speed measurement signal. A display device receives the speed measurement signal and displays it on a display part of the display device. The preset vehicle is equipped with a photoelectric reflection speed sensor, so that the preset vehicle can measure the moving speed of the preset vehicle through photoelectric refraction and detection during driving.

Description

Photoelectric reflection speed sensor for bicycle and speed measurement method thereof

The present invention relates to a photoelectric reflection speed sensor for bicycles and a speed measurement method thereof, and in particular to a method of measuring the moving speed of a preset vehicle by installing a photoelectric reflection speed sensor on the preset vehicle so that the preset vehicle can reflect and detect photoelectricity during driving.

According to the report, since modern people are very busy in life and work, they will use their holiday time to engage in outdoor leisure activities. The increasing frequency of outdoor activities has also increased the people's attention to leisure sports. Riding bicycles and electric assisted bicycles to achieve leisure purposes has also become a very popular outdoor leisure method in recent years.

As the frequency of use of bicycles, electric vehicles and other tools gradually increases, relevant industries analyze the frequency of bicycle use and movement-related data and develop relevant speed measurement and sensing devices. However, traditional bicycle speed sensors are manufactured based on the principle of electromagnetic induction (Hall effect), which is more likely to be interfered by external electromagnetic effects. This is the key point that those engaged in this industry are eager to study and improve.

Therefore, in view of the above problems and deficiencies, the inventor collected relevant information, evaluated and considered various aspects, and used his many years of experience in this industry to continuously try and modify, and finally designed this photoelectric reflection speed sensor for bicycles and its speed measurement method invention patent.

The main purpose of the present invention is a photoelectric reflection speed sensor for a bicycle, which is arranged on a preset vehicle and includes a light source emitting module, which includes a first light source emitting device arranged around a pedal axis adjacent to the preset vehicle, and a second light source emitting device arranged on the same side as the first light source emitting device, and the first light source emitting device and the second light source emitting device will respectively emit a first incident light and a second incident light, a light source emitting module, which is arranged on the pedal axis and faces a side of the light source emitting module, and the axle reflection panel will rotate with the pedal axis and continuously reflect the first incident light and the second incident light emitted by the light source emitting module, and a light sensing module, which includes sensing the first incident light and the second incident light reflected by the axle reflection panel. A first light sensor and a second light sensor are provided for emitting light and transmitting a first pulse signal and a second pulse signal according to the number of times sensed per minute, a processor is provided for analyzing the time difference between the first pulse signal and the second pulse signal to calculate the moving speed and the forward direction of the preset vehicle, and transmitting a speed measurement signal, and a display device is provided for receiving the speed measurement signal and displaying it on the display On a display unit on the device, the light source emitting module continuously emits the first incident light and the second incident light, and reflects on the axle reflection panel, so that the light sensing module measures the number of light sensing times per minute, so that the processor calculates the moving speed and forward direction of the preset vehicle, thereby achieving the effect of measuring the moving speed of the preset vehicle through photoelectric sensing.

1: Light source emission module

11: First light source emitting device

12: Second light source emitting device

2: Axle reflective panel

21: Low reflective surface

22: Reflection part

3: Light sensing module

31: First light sensor

32: Second light sensor

4: Processor

5: Display device

51: Display unit

6: Low reflective housing

A1: Default vehicle

A11: Pedal axle

[Figure 1] is a functional block diagram of the photoelectric reflection speed sensor for bicycles of the present invention.

[Figure 2] is a side view of the photoelectric reflection speed sensor for bicycles of the present invention.

[Figure 3] is a partial enlarged view of Figure 2 of the present invention.

[Figure 4] is a step flow chart of the photoelectric reflection speed sensor for bicycles of the present invention.

Please refer to Figures 1 to 3, which are functional block diagrams, side views and a partial enlarged view of Figure 2 of the photoelectric reflection type speed sensor for bicycles of the present invention. The photoelectric reflection type speed sensor for bicycles of the present invention is arranged on a preset vehicle A1, and mainly includes a light source emitting module 1, an axle reflection panel 2, a light sensing module 3, a processor 4 and a display device 5. The connection relationship of the components is as follows: the light source emitting module 1 includes a first light source emitting device 11 disposed around a pedal axis A11 on the preset vehicle A1, and a second light source emitting device 12 disposed on the same side as the first light source emitting device 11, and the first light source emitting device 11 and the second light source emitting device 12 emit a first incident light and a second incident light respectively.

The axle reflective panel 2 is disposed on the pedal axle A11 and faces one side of the light source emitting module 1, and the axle reflective panel 2 rotates along with the pedal axle A11 and continuously reflects the first incident light and the second incident light emitted by the light source emitting module 1.

The light sensing module 3 senses the first incident light and the second incident light reflected by the axle reflective panel 2 and transmits the first pulse signal and the second pulse signal according to the number of times sensed per minute.

The processor 4 analyzes the time difference between the first pulse signal and the second pulse signal to calculate the moving speed and forward direction of the preset vehicle A1, and transmits a speed measurement signal.

The display device 5 receives the speed measurement signal and displays it on a display unit 51 on the display device 5.

The axle reflective panel 2 includes a low-reflective surface 21 made of a low-reflective material, and a plurality of reflective portions 22 arranged in a ring shape and made of a high-reflective material are provided at adjacent outer diameters of the low-reflective surface 21 to reflect the first incident light and the second incident light emitted by the light source emitting module 1.

The light source emitting module 1, the axle reflective panel 2 and the light sensing module 3 are further covered with a low-reflective shell 6 that blocks external light to prevent external light from affecting the reflection result.

The light source emitting module 1 can be an infrared or laser emitter, and the light sensing module 3 can be an infrared or laser receiver.

The photoelectric reflection speed sensor for bicycle and the speed measuring method thereof of the present invention can be used in actual application. A preset user can start the photoelectric reflection speed meter on the preset vehicle A1 and ride the preset vehicle A1 to move for speed measurement. The pedal axle A11 on the preset vehicle A1 will rotate due to the pedaling of the preset user, thereby driving the axle reflection panel 2 on the pedal axle A11 to rotate together. The first light source emitting device 11 and the second light source emitting device 12 arranged around the pedal axle A11 will continuously irradiate the reflection angle of the axle reflection panel 2 with the first incident light and the second incident light. The reflection portion 22 arranged in a plurality of rings on the axle reflection panel 2 will rotate each time it passes through the reflection portion 22. The first incident light and the second incident light are reflected after the pedal is rotated at an angle, and the first incident light and the second incident light are received by the first light sensor 31 and the second light sensor 32 on the light sensing module 3 disposed around the pedal axis A11, and the first pulse signal is transmitted according to the number of times the first incident light and the second incident light are sensed per minute. The processor 4 analyzes the first pulse signal and the second pulse signal to calculate the moving speed and forward direction of the preset vehicle A1, and transmits the speed measurement signal to the display unit 51 of the display device 5 to display the moving speed of the preset vehicle A1 to the preset user, thereby achieving the effect of measuring the vehicle speed by photoelectric reflection.

The processor 4 will determine the rotation direction of the preset vehicle A1 shaft according to the time difference between the first pulse signal and the second pulse signal. If the rotation direction is negative, it can be determined that the preset vehicle A1 is moving backward, and no signal is transmitted. If it is positive, a speed measurement signal is transmitted to the display device 5.

The above-mentioned default vehicle A1 can be a bicycle or an electric bicycle, which is a means of transportation that moves by rotating the wheels.

The display device 5 mentioned above can be an LCD display, LED display or other device with display function.

Please refer to Figure 4 again, which is a flow chart of the photoelectric reflection speed sensor for bicycles and the speed measurement method of the present invention. It can be clearly seen from the figure that the execution steps of the photoelectric reflection speed sensor for bicycles of the present invention are as follows:

(A01) A preset user rides the preset vehicle A1 and starts the photoelectric reflection speed meter.

(A02) The first light source emitting device 11 and the second light source emitting device 12 of the photoelectric reflection speed meter continuously emit the first incident light and the second incident light to the corresponding reflection angle on the axle reflection panel 2. The axle reflection panel 2 is arranged on the pedal axle A11 of the preset vehicle A1, and the axle reflection panel 2 rotates according to the pedaling frequency of the preset user. The reflection angle at which the first incident light and the second incident light enter is emitted to the multiple reflection parts 22 arranged in multiple rings on the axle reflection panel 2 for light reflection, and the multiple reflection parts 22 rotate with the axle reflection panel 2 rotating with the pedaling frequency, so that the first incident light and the second incident light at the reflection angle are switched between the multiple reflection parts 22 for light reflection.

(A03) The first light sensor 31 and the second light sensor 32 disposed on one side of the axle reflective panel 2 receive the first incident light and the second incident light reflected from the multiple reflective portions 22, and transmit the first pulse signal and the second pulse signal to a processor 4 according to the number of times the first incident light and the second incident light are sensed and received per minute.

(A04) The processor 4 analyzes the first pulse signal and the second pulse signal to calculate the moving speed of the preset vehicle A1 and the time difference between the first pulse signal and the second pulse signal, and the processor 4 determines the rotation direction of the shaft according to the time difference. If the rotation direction is negative, it can be determined that the preset vehicle A1 is moving backward, and no signal is transmitted. If it is positive, a speed measurement signal is transmitted to a display device 5.

(A05) The display device 5 receives the speed measurement signal and displays it on a display unit 51 on the display device 5.

(A06) The user is preset to turn off the photoelectric reflection speedometer to complete the step flow of the speed measurement method of the photoelectric reflection speed sensing method for the bicycle.

In addition, the non-reflective surface of the axle reflective panel 2 in the above step (A02) is made of low-reflective material to avoid unnecessary reflections causing errors in the judgment of the light sensor.

The light source emitting module 1, the axle reflective panel 2 and the light sensing module 3 in the above-mentioned steps (A02) and (A03) are further covered with a low-reflective shell 6 that blocks external light to prevent external light from affecting the reflection result.

The calculation of the moving speed of the preset vehicle A1 in the above step (A04) is through the rotation speed per minute = 60/[signal cycle (ms)*total number of reflection parts]/0.001, then the rotation speed per minute*the tire circumference of the preset vehicle (cm)=moving distance per minute (cm), and then the moving distance per minute (cm)*60/1000/1000=moving kilometers per hour.

The present invention has the following advantages:

(1) The photoelectric reflection speed sensor for bicycles measures the speed of the preset vehicle A1 through the photoelectric reflection sensing method. Compared with the electromagnetic induction sensor, it has a faster and more stable conversion speed, thereby improving the accuracy of speed measurement.

(ii) The housing of the photoelectric reflection speed sensor for bicycles is covered with a low-reflection housing 6 that blocks reflections, which can avoid interference from external light and thus improve the degree of perfection of speed measurement.

The above is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Therefore, all simple modifications and equivalent structural changes made by using the contents of the present invention's specification and drawings should be included in the patent scope of the present invention and should be stated.

In summary, the photoelectric reflection speed sensor and speed measurement method for bicycles of this invention can achieve its effect and purpose in actual application. Therefore, this invention is a research and development with excellent practicality. In order to meet the application requirements of invention patents, an application is filed in accordance with the law. I hope that the review committee will approve this case as soon as possible to protect the inventor's hard work and creation. If the review committee of the Jun Bureau has any doubts, please feel free to write to give instructions. The inventor will do his best to cooperate and will be grateful for the convenience.

1: Light source emission module

11: First light source emitting device

12: Second light source emitting device

2: Axle reflective panel

21: Low reflective surface

22: Reflection part

3: Light sensing module

31: First light sensor

32: Second light sensor

4: Processor

5: Display device

51: Display unit

6: Low reflective housing

A1: Default vehicle

A11: Pedal axle

Claims (9)

A photoelectric reflection speed sensor for a bicycle is provided on a preset vehicle, and comprises: a light source emitting module, comprising a first light source emitting device provided around a pedal axis adjacent to the preset vehicle, and a second light source emitting device provided on the same side as the first light source emitting device, and the first light source emitting device and the second light source emitting device respectively emit a first incident light ray and a second incident light ray; an axle reflection panel is provided on the pedal axis and faces one side of the light source emitting module, and the axle reflection panel rotates with the pedal axis and continuously reflects the light a light sensor module, which includes a first light sensor and a second light sensor, which sense the first light and the second light reflected by the axle reflective panel and transmit a first pulse signal and a second pulse signal according to the number of times sensed per minute; a processor, which analyzes the time difference between the first pulse signal and the second pulse signal to calculate the moving speed and forward direction of the preset vehicle and transmits a speed measurement signal; a display device, which receives the speed measurement signal and displays it on a display unit on the display device. The photoelectric reflection speed sensor for a bicycle as described in claim 1, wherein the axle reflection panel includes a low reflection surface made of a low reflection material, and a plurality of reflection parts arranged in a ring shape and made of a high reflection material are provided at adjacent outer diameters of the low reflection surface to reflect the first incident light and the second incident light emitted by the light source emission module. The photoelectric reflection speed sensor for a bicycle as described in claim 1, wherein the first light emitting device and the second light emitting device can be infrared or laser emitters, and the first light sensor and the second light sensor can be infrared or laser receivers. The photoelectric reflection speed sensor for bicycle as described in claim 1, wherein the light source emitting module, the axle reflection panel and the light sensing module are further covered with a low-reflection shell that blocks external light to prevent external light from affecting the reflection result. A photoelectric reflection speed sensing method for a bicycle is implemented according to the following steps: (A01) a preset user rides a preset vehicle and starts a photoelectric reflection speedometer; (A02) a first light source emitting device and a second light source emitting device of the photoelectric reflection speedometer continuously emit a first incident light and a second incident light at a reflection angle on a corresponding axle reflection panel, the axle reflection panel is disposed on the pedal axle of the preset vehicle, and the axle reflection panel is The axle reflective panel rotates according to the pedaling frequency of the preset user, and the reflection angles at which the first incident light and the second incident light are incident are projected onto the axle reflective panel on which the light is reflected by a plurality of reflective portions arranged in a plurality of rings. The axle reflective panel rotates according to the pedaling frequency, thereby switching the light reflection between the first incident light and the second incident light at the reflection angle between the plurality of reflective portions. (A03) The axle reflective panel is provided with The first light sensor and the second light sensor on one side receive the first incident light and the second incident light after being reflected by the multiple reflective parts, and transmit the first pulse signal and the second pulse signal to a processor according to the number of times the first incident light and the second incident light are sensed and received per minute; (A04) the processor analyzes the first pulse signal and the second pulse signal to calculate the moving speed of the preset vehicle and the time difference between the first pulse signal and the second pulse signal. , and the processor determines the rotation direction of the shaft according to the time difference. If the rotation direction is negative, it can be determined that the preset vehicle is moving backward, and no signal is transmitted. If it is positive, a speed measurement signal is transmitted to a display device; (A05) The display device receives the speed measurement signal and displays it on a display unit on the display device; (A06) The preset user turns off the photoelectric reflection speedometer to complete the step flow of the speed measurement method of the photoelectric reflection speed sensing method for the bicycle. The photoelectric reflection speed sensing method for bicycles as described in claim 5, wherein the surface of the non-reflective portion of the axle reflection panel in step (A02) is made of a low-reflective material to avoid excess reflection causing the light sensor to make an erroneous judgment. The photoelectric reflection speed sensing method for bicycles as described in claim 5, wherein the light source emitting module, the axle reflection panel and the light sensing module in steps (A02) and (A03) are further covered with a low-reflection shell that blocks external light to prevent external light from affecting the reflection result. The photoelectric reflection speed sensing method for bicycles as described in claim 5, wherein the moving speed of the preset vehicle in step (A04) is calculated by revolutions per minute = 60/[signal cycle (ms)*total number of reflective parts]/0.001, then the revolutions per minute*the tire circumference of the preset vehicle (cm)=moving distance per minute (cm), then moving distance per minute (cm)*60/1000/1000=moving kilometers per hour. The photoelectric reflection speed sensing method for bicycles as described in claim 5, wherein the light source emitting module of step (A02) can be an infrared or laser emitter, and the light sensing module can be an infrared or laser receiver.

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