1. A video device for realtime pedaling frequency estimation, mounted on a bike and comprising
an image capture unit capturing continuous dynamic images of an upper body of a biker;
an image recognition unit electrically connected with said image capture unit and recognizing images of symmetric regions of said biker and images of swings of said symmetric regions from said continuous dynamic images;
a microprocessor electrically connected with said image recognition unit, calculating a frequency of periodical swings of said biker from said images of said symmetric regions and said images of said swings of said symmetric regions, and then obtaining a pedaling frequency; and
a display device electrically connected with said microprocessor and presenting information of said pedaling frequency.
2. The video device for realtime pedaling frequency estimation according to claim 1, wherein said microprocessor uses said pedaling frequency, a gear ratio of said bike, and a wheel diameter of said bike to work out speed of said bike.
3. The video device for realtime pedaling frequency estimation according to claim 1, wherein said images of said symmetric regions are a left shoulder image and a right shoulder image of said biker, and wherein a first reference point and a second reference point are respectively established at said left shoulder image and said right shoulder image of said biker, and wherein images of continuous variation of a relative tilt angle of said first reference point and said second reference point are used as said images of said swings of said symmetric regions.
4. The video device for realtime pedaling frequency estimation according to claim 3, wherein said image recognition unit uses an edge detection method to detect edge pixels having dramatic gradient variation in said continuous dynamic images and uses a Hough Transform to connect said edge pixels to define a left shoulder line of said left shoulder image and a right shoulder line of said right shoulder image.
5. The video device for realtime pedaling frequency estimation according to claim 3, wherein said microprocessor uses a period of swings of said left shoulder line and said right shoulder line and variation of a relative tilt angle of said left shoulder line and said right shoulder line to calculate said frequency of said periodical swings of said hiker, and then obtains said pedaling frequency.
6. The video device for realtime pedaling frequency estimation according to claim 3, wherein an intersection of said left shoulder line and a neck of said biker is used as a start point of said left shoulder line, and said first reference point is defined via extending said start point of said left shoulder line outward by 50 pixels, and wherein an intersection of said right shoulder line and said neck of said biker and is used as a start point of said right shoulder line, and said second reference point is defined via extending said start point of said right shoulder line outward by 50 pixels.
7. The video device for realtime pedaling frequency estimation according to claim 1, wherein said images of said symmetric regions are a left ear image and a right ear image of said biker, and wherein a first reference point and a second reference point are respectively established at said left ear image and said right ear image of said biker, and wherein images of continuous variation of a relative tilt angle of said first reference point and said second reference point are used as said images of said swings of said symmetric regions.
8. The video device for realtime pedaling frequency estimation according to claim 7, wherein said image recognition unit uses an edge detection method to detect edge pixels having dramatic gradient variation in said continuous dynamic images and uses a Hough Transform to connect said edge pixels to define a left ear contour line of said left ear image and a right ear contour line of said right ear image.
9. The video device for realtime pedaling frequency estimation according to claim 7, wherein said microprocessor uses a period of swings of said left ear contour line and said right ear contour line and variation of a relative tilt angle of said left ear contour line and said right ear contour line to calculate said frequency of said periodical swings of said biker, and then obtains said pedaling frequency.
10. The video device for realtime pedaling frequency estimation according to claim 1, wherein said image capture unit is CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) sensor.
11. The video device for realtime pedaling frequency estimation according to claim 1, wherein said image recognition unit is a human image recognition program built in said microprocessor.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A voltage stabilizing module for multi power source input compatible with multiple input power sources including DC power source andor AC power source, comprising:
a plurality of receiving ends receiving the input power sources;
a power source selection unit coupled with the receiving ends to receive the input power sources and setting at least one of the input power sources as a working power source; and
a voltage conversion unit receiving the working power source and keeping the working power source at a working voltage level to act as a voltage signal outputted to a loading.
2. The voltage stabilizing module for multi power source input as recited in claim 1, wherein the power source selection unit includes:
a switch circuit coupled with the receiving ends to receive the input power sources; and
a control circuit coupled with the switch circuit.
3. The voltage stabilizing module for multi power source input as recited in claim 1, wherein the voltage conversion unit includes:
a filter circuit coupled with the power source selection unit;
a rectification circuit coupled with the filter circuit; and
a step-upstep-down circuit coupled with the filter circuit and the rectification circuit.
4. The voltage stabilizing module for multi power source input as recited in claim 3, wherein the filter circuit filters out the noise of the working power source.
5. The voltage stabilizing module for multi power source input as recited in claim 3, wherein when the working power source is an AC power source, the rectification circuit rectifies the working power source into a DC power source.
6. The voltage stabilizing module for multi power source input as recited in claim 3, wherein the step-upstep-down circuit keeps the working power source at the working voltage level to act as the voltage signal outputted to the loading.
7. The voltage stabilizing module for multi power source input as recited in claim 3, wherein the step-upstep-down circuit is a power factor correction (PFC) circuit.
8. A fan system compatible with multiple input power sources including DC power source andor AC power source, comprising:
a fan motor;
a driving circuit connected with the fan motor; and
a voltage stabilizing module for multi power source input, comprising:
a plurality of receiving ends receiving the input power sources;
a power source selection unit coupled with the receiving ends to receive the input power sources and setting at least one of the input power sources as a working power source; and
a voltage conversion unit receiving the working power source and keeping the working power source at a working voltage level to act as a voltage signal outputted to the driving circuit,
wherein the driving circuit receives the voltage signal to drive the fan motor to operate.
9. The fan system as recited in claim 8, wherein the power source selection unit includes:
a switch circuit coupled with the receiving ends to receive the input power sources; and
a control circuit coupled with the switch circuit.
10. The fan system as recited in claim 8, wherein the voltage conversion unit includes:
a filter circuit coupled with the power source selection unit;
a rectification circuit coupled with the filter circuit; and
a step-upstep-down circuit coupled with the filter circuit and the rectification circuit.
11. The fan system as recited in claim 10, wherein the filter circuit filters out the noise of the working power source.
12. The fan system as recited in claim 10, wherein when the working power source is an AC power source, the rectification circuit rectifies the working power source into a DC power source.
13. The fan system as recited in claim 10, wherein the step-upstep-down circuit keeps the working power source at the working voltage level to act as the voltage signal outputted to the driving circuit.
14. The fan system as recited in claim 10, wherein the step-upstep-down circuit is a power factor correction (PFC) circuit.
15. A fan system, comprising:
a fan motor;
a driving circuit connected with the fan motor; and
a voltage stabilizing module, comprising:
an input end coupled with a DC power source or an AC power source; and
a voltage conversion unit coupled with the input end and receiving the DC power source or the AC power source, and keeping the DC power source or the AC power source at a working voltage level to act as a voltage signal outputted to the driving circuit,
wherein the driving circuit receives the voltage signal to drive the fan motor to operate.
16. The fan system as recited in claim 15, wherein the voltage conversion unit comprises:
a filter circuit coupled with the input end;
a rectification circuit coupled with the filter circuit; and
a step-upstep-down circuit coupled with the filter circuit and the rectification circuit.
17. The fan system as recited in claim 16, wherein the filter circuit filters out the noise of the DC power source or the AC power source.
18. The fan system as recited in claim 16, wherein when the input end is coupled with the AC power source, the rectification circuit rectifies the AC power source into a DC power source.
19. The fan system as recited in claim 16, wherein the step-upstep-down circuit keeps the DC power source or the AC power source at the working voltage level to act as the voltage signal outputted to the driving circuit.
20. The fan system as recited in claim 16, wherein the step-upstep-down circuit is a power factor correction (PFC) circuit.