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本文提出一个新型应变仪检定装置的结构原理和设计要点。新装置是建立在“感应分压器——电阻匹配网络”作为标准比率器的原理基础上,它既具有高准确度和高稳定性,也具有电阻比率网络的性质,所以可以检定交流供电的应变仪及应变标准模拟仪(即应变仪标准比率器件),以及对各种传感器的标定。装置的工作范围:400～20000Hz,100～20000με,准确度为2×10~(-4),比电阻式标准高一个数量级,而且对温度影响甚不敏感。
This paper presents a new strain gauge test device structure principle and design points. The new device is built on the principle of a “sense voltage divider - resistor matching network” as a standard ratioer, which combines high accuracy and high stability with a resistivity ratio network so that it can verify AC-powered Strain gauge and strain gauge simulators (ie Strain Gauges standard ratio devices), as well as calibration of various sensors. The working range of the device: 400 ~ 20000Hz, 100 ~ 20000με, accuracy of 2 × 10 ~ (-4), an order of magnitude higher than the resistance standard, but also very insensitive to temperature effects.