and at temperatures t+ and t-, which correspond to the upper and lower limit of the working range of temperatures, and non-linearity of the TSC of the bridge circuit If the produced value ∆αdo is positive, then positive non-linearity of the bridge circuit TSC is converted into negative one. For this purpose they determine input resistance and its temperature resistance coefficient (TRC), as well as TSC of resistance strain gauges and at temperatures t+ and t- and calculate non-linearity of TSC of resistance strain gauges The rating of the thermally dependent resistor Rαinp, and the rating of thermally independent resistors Rdinp, and Ri are calculated. The resistor Ri is installed into the power supply diagonal of the bridge circuit, the input resistance of which is shunted by serially connected resistors Rαinp and Rdinp. The TSC of the bridge circuit is determined under temperatures t+ and t-, the non-linearity of TSC of the bridge circuit is calculated as ∆αdo. If non-linearity of the TSC takes a negative value that meets the inequality ∆αdo≤-2·10-6 1/°C, then multiplicative temperature error is compensated for by means of calculation and connection of a thermally dependent resistor Rαout, shunted with a thermally independent resistor Rdout, into the output diagonal of the bridge circuit in series with the load.;EFFECT: increased accuracy of tuning with positive non-linearity of bridge circuit TSC.;1 tbl, 2 dwg"/>
公开/公告号RU2528242C2
专利类型
公开/公告日2014-09-10
原文格式PDF
申请/专利号RU20120145917
申请日2012-10-26
分类号G01B7/16;
国家 RU
入库时间 2022-08-21 15:38:21