| 摘要 |
PURPOSE:To measure the strain developed by the load alone by mounting two resistance elements of different coeffts. of thermal expansion and arithmetically operating the strain outputs in such a way that the outputs occuring in temp. changes out of their strain outputs to be removed. CONSTITUTION:The outputs of strain gages 11, 12 consisting of two resistance elements 11A, 12A of different coeffts. of thermal expansion are inputted via amplifiers 13, 14 to an operator 15. The inputs e3, e4 thereof are linearly coupled in an operational amplifier 17 via prescribed resistances 18, 19 of an operator 15, by which the strain output parts by heat are offset and the strain output e5 developed by the load alone is outputted to a recoder 16. |
