Bicycle speed measuring system

Abstract

The invention provides a bicycle speed measuring system, which comprises a light transmitting module and a light receiving module, wherein the light transmitting module transmits visible light in a preset wavelength range; the light receiving module receives a wheel diameter parameter of a bicycle wheel input by a user; and when the light receiving module detects the visible light transmitted by the light transmitting module in the preset wavelength range, a trigger signal is generated, an instant speed is calculated according to the interval time of two continuous trigger signals and the wheel diameter parameter, and the speed, running distance and other running information are displayed by a display. The system has an extremely simple circuit structure, the whole structure is not provided with a complex mechanical structure, noble metals and other high-price materials are not needed to be used, an automatic production process of the speed measuring system can be effectively realized, and labor cost, inventory cost, manufacturing cost and the like are greatly reduced.

Description

technical field [0001] The invention relates to a bicycle speed measurement system. The speed measurement system mainly uses a light sensor to detect the visible light emitted by a light-emitting element, and calculates the bicycle speed and driving distance and other driving information through a controller, so that the user can see through Get the driving information through the display. Background technique [0002] In response to energy conservation and carbon reduction, in response to global warming and the global energy crisis, the government actively encourages the public to ride bicycles, and the planning of bicycle lanes is becoming more and more perfect. By the end of 2007, Taiwan had completed more than forty bicycle lanes, and The number of people riding bicycles has also increased. According to the 2008 statistics from the Taiwan Economic Development Council, the number of bicycle riders in Taiwan has grown significantly to 700,000, and 80% of them are for leis...

AI Technical Summary

Problems solved by technology

If the user is riding a bicycle, the gravel on the ground flies up and breaks the glass tube 12 of the reed switch 1, the reeds 10, 11 may be oxidized due to contact with the outside air, causing the reed The switch 1 is damaged and cannot conduct electricity smoothly when the reeds 10 and 11 are in contact, so that the single chip cannot accurately capture the electrical signal, which greatly affects the accuracy of the speed measurement

Although there are industry operators who plate precious metals (such as rhodium, ruthenium and gold) on the surfaces of these reeds 10, 11 for avoiding the surface oxidation of these reeds 10, 11, to ensure its reliability, but this is Significantly increase the material and production costs of the reed switch 1, and make the process more complicated, which is not ideal

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