| 摘要 |
PURPOSE:To corretly measurement-display the traveling state by measuring the traveling state of a traveling body when the revolution detection level of a wheel reaches a previously set revolution level and by displaying the measured traveling state of the traveling body, on a display means. CONSTITUTION:A transmitter 6 generates a revolution detection pulse signal by the electromagnetic inductive action when a magnet 4 installed at a proper place of a front wheel 2 passes through the side, accompanied with the revolution of the front wheel 2, and the revolution detection pulse signal is received by a receiver 7 installed on the handle bar, etc., of a bicycle. Further, a dynamo 8 generates the voltage at the level corresponding to the revolution state of a rear wheel 2b, and supplies the generated voltage signal to the receiver 7. The receiver 7 starts the measurement operation for the travling time by a built-in timer, when the power generation voltage in the dynamo 8 reaches a set voltage level, and the traveling time, traveling speed, traveling distance, etc., are measurement-calculated on the basis of the front wheel revolution detection pulse signal and the measurement traveling time, and the results are displayed on a liquid crystal display part 9 of the receiver 7. |
