SU684294A1 - Method of assessing strain gauge characteristic inconsistency - Google Patents
Method of assessing strain gauge characteristic inconsistencyInfo
- Publication number
- SU684294A1 SU684294A1 SU782594489A SU2594489A SU684294A1 SU 684294 A1 SU684294 A1 SU 684294A1 SU 782594489 A SU782594489 A SU 782594489A SU 2594489 A SU2594489 A SU 2594489A SU 684294 A1 SU684294 A1 SU 684294A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- strain gauge
- gauge characteristic
- assessing strain
- inconsistency
- characteristic inconsistency
- Prior art date
Links
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Description
мощности. Тензорезисторы подбирают с одинаковыми сопротивлени ми (с малым разбросом сопротивлений), наклеивают на упругий элемент и включают в мостовую схему. В результате температуры нагрева тензорезисторов оказываютс равными, с высокой точностью и измен ютс синхронно с удвоенной частотой. При наличии разницы в температурных коэффициентах тензорезисторов на выходе мостовой схемы по вл етс втора гармоника питающего синусоидального напр жени . Так как температурный коэффициент сопротивлени тензорезисторов вл етс нелинейной величиной, то, кроме второй гармоники, в выходном сигнале будут присутствовать и друг высшие гармоники синусоидального напр жени . Дл того, чтобы форма напр жени питани не вли ла на точночть оценки нестабильности характеристик тензорезисторов, величину нелинейных искажений напр жени питани вычитают из величины нелинейных искажений на выходе тензорезисторов .power. Strain gages are selected with the same resistance (with a small scatter of resistance), glued to the elastic element and included in the bridge circuit. As a result, the heating temperatures of the strain gages are equal, with high accuracy, and vary synchronously with twice the frequency. If there is a difference in the temperature coefficients of the strain gauges, the second harmonic of the supply sinusoidal voltage appears at the output of the bridge circuit. Since the temperature coefficient of resistance of the strain gages is a non-linear value, then, apart from the second harmonic, the higher harmonics of the sinusoidal voltage will also be present in the output signal. In order to ensure that the form of the supply voltage does not affect the exact estimates of the instability of the characteristics of the resistance strain gages, the magnitude of the nonlinear distortion of the supply voltage is subtracted from the magnitude of the nonlinear distortion at the output of the strain gages.
Процесс измерени нестабильности характеристик тензорезисторов поThe process of measuring the instability of the characteristics of strain gauges by
пр едлагаемому способу занимает несколько минут.This method takes a few minutes.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU782594489A SU684294A1 (en) | 1978-03-21 | 1978-03-21 | Method of assessing strain gauge characteristic inconsistency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU782594489A SU684294A1 (en) | 1978-03-21 | 1978-03-21 | Method of assessing strain gauge characteristic inconsistency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU684294A1 true SU684294A1 (en) | 1979-09-05 |
Family
ID=20755262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU782594489A SU684294A1 (en) | 1978-03-21 | 1978-03-21 | Method of assessing strain gauge characteristic inconsistency |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU684294A1 (en) |
-
1978
- 1978-03-21 SU SU782594489A patent/SU684294A1/en active
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