| 摘要 |
PURPOSE:To measure weight of a car body which is running, by correcting a load derived from a peak value of a pulse wave signal, by a correction value derived from a sensitive time of an inputted pulse wave signal, after a photoelectric sensor signal has turned off. CONSTITUTION:When a car body 14 advancing in the direction as indicated with an arrow in the figure passes through a detecting part 16, a photoelectric sensor 15 operates first at the time of passing and an ON signal is outputted. Subsequently, a sensitive time of the first pulse wave signal of a car body gravimeter sensor 1 consisting of a pressure sensitive conductive rubber material, and a peak value are inputted to a RAM of a computer 18 from an interface 7. When the car body 14 passes through, and a signal of the sensor 15 becomes OFF, a speed of the car body is estimated from the inputted sensitive time, and from the estimated speed, a resistance correction coefficient is derived. Next, from the inputted peak value, a resistance value is derived, and from a corrected resistance value which has multiplied said value by the resistance correction coefficient, a load of the car body is calculated. Its result is displayed on a CRT 19, and weight of the car body which is running can be measured.
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