| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a system for accurately temperature-compensating load sensor output, based on temperature of mounting object at the present or on the past trend of temperature variations, to correctly compute the deadweight of a vehicle, even if the output of the load sensor tracks the temperature change in its mounting area and is changed without time difference. SOLUTION: In this method, temperature linear correction that uses temperature linear correction coefficient m is made with respect to a load signal F from a load sensor 11 in a custom IC 13 for each sensor unit 10, to compensate for the temperature drift component contained in the load signal F. Then in a microcomputer 23 of a main unit 20, temperature variation correction, using temperature variation correction coefficient a, is made on a load signal F3 after the temperature linear correction and frequency-voltage conversion, to compensate delay in trackability for the temperature variation of the load signal F, from the load sensor 11 caused by expansion, based on the temperature variation in the axle shaft area with the load sensor 11 attached and improving the trackability. COPYRIGHT: (C)2008,JPO&INPIT
|
