| 摘要 |
PURPOSE:To use efficiently outputs of plural load cells to improve cost-saving characteristics, by amplifying output voltages of plural load cells in buffer amplifiers, respectively and adding them in an adder. CONSTITUTION:Load cells 11, 12, 13, and 14 consist of Roberval mechanisms, respectively and are attached to four corners of a balance base, and a saucer is placed on them. Strain gauges are mounted in four positions of each of load cells 11-14 and constitute a quadrilateral resistance bridge. Respective one diagonal contacts of bridges of load cells 11-14 are connected to noninverted input terminals (+) of buffer amplifiers 16, 17, 18, and 19, respectively, and the other diagonal contacts are grounded. Outputs of these buffer amplifiers 16, 17, 18, and 19 are inputted to an adder 20. |
