| 摘要 |
PROBLEM TO BE SOLVED: To obtain an accurate liquid level by correcting the error of components in a mechanism for obtaining the liquid level in accordance with the position of a float by rotating a drum by detecting the tension of a wire suspending the float. SOLUTION: A control circuit detects an output value B of a sensor to a rotating angle A of the drum. For example, at the rotating angle of 90°, a correction line E connecting between known light and heavy outputs C, D is obtained, and for each rotating angle A, for example, for each 1°, the correction line E is obtained. Thus, to the obtained tension, a tension correction value F is obtained for each rotating angle, and an accurate tension of the measuring wire is obtained by correcting the sensor output on the actual measurement. By driving a motor using this sensor output, the rotation of the drum is controlled in accordance with the true value of the tension value. COPYRIGHT: (C)2010,JPO&INPIT
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