| 摘要 |
FIELD: development and production of transducers with bridge circuit. ^ SUBSTANCE: method is base upon influencing cavity of transducer by temperature jump, for example, by heat shock produced by liquid nitrogen, and voltage drops are measured at all four strain-gauge resistive transducers simultaneously during the whole time of thermal stabilization of transducer. Changes in resistances of strain-gauge transducers are determined from results of change in voltage drop at strain-gauge transducers for any time moment of heat shock; the changes are used to find the causes of drops. Amplitudes of changes in voltage drops are found for all four strain-gauge resistors during the whole time of heat shock and their divergence is estimated as in amplitude and in time shift and the cause of divergences are revealed. Voltage drops are added at strain-gauge resistors disposed at opposite arms of bridge circuits at any time moment of heat shock and voltage drop sums are subtracted from each other. As a result the change in initial output signal of transducer is achieved during the whole period of heat shock; additive temperature sensitivity is calculated taken the change into account. Described method allows to determine not only character of error change in terms of time and its quantitative characteristic but to reveal mechanism of it initiation and to find the way of minimization of the error. ^ EFFECT: improved truth of determination. ^ 6 dwg, 1 tbl |
