| 摘要 |
<p>PURPOSE:To rationalize goods control work by controlling the oscillation frequency of a crystal resonator by the output of a load sensor supporting a goods shelf and calculating gross weight or the number of the goods on the shelf from a variation of the oscillation frequency. CONSTITUTION:Holding parts 16 of both ends of the load sensor 14 are inserted between a shelf plate and a supporting plate on which the goods are put. When the goods are put on the shelf, a beam part 17 is deformed as per a dotted line and the crystal resonator 18 stuck to a node part of an oscillation part 15 sustains the stress. The crystal resonator 18 is connected with an oscillation circuit 19 and the oscillation frequency is changed according to the magnitude of the stress. Weight or the number of the goods put on the goods shelf is calculated from the variation of the frequency. Hereby, the goods control work is rationalized.</p> |
