RU2000101990A - METHOD FOR MEASURING RELATIVE STRUCTURAL DEFORMATIONS WHEN TENSOR RESISTORS ARE CONNECTED TO A TENSOMETRIC SYSTEM - Google Patents

METHOD FOR MEASURING RELATIVE STRUCTURAL DEFORMATIONS WHEN TENSOR RESISTORS ARE CONNECTED TO A TENSOMETRIC SYSTEM

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Publication number
RU2000101990A
RU2000101990A RU2000101990/28A RU2000101990A RU2000101990A RU 2000101990 A RU2000101990 A RU 2000101990A RU 2000101990/28 A RU2000101990/28 A RU 2000101990/28A RU 2000101990 A RU2000101990 A RU 2000101990A RU 2000101990 A RU2000101990 A RU 2000101990A
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RU
Russia
Prior art keywords
resistance
strain gauge
value
reference resistor
strain
Prior art date
Application number
RU2000101990/28A
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Russian (ru)
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RU2196296C2 (en
Inventor
Евгений Георгиевич Зубов
Юрий Степанович Ильин
Анна Ивановна Лебедева
Original Assignee
Центральный аэрогидродинамический институт им. проф. Н.Е. Жуковского
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Application filed by Центральный аэрогидродинамический институт им. проф. Н.Е. Жуковского filed Critical Центральный аэрогидродинамический институт им. проф. Н.Е. Жуковского
Priority to RU2000101990A priority Critical patent/RU2196296C2/en
Priority claimed from RU2000101990A external-priority patent/RU2196296C2/en
Publication of RU2000101990A publication Critical patent/RU2000101990A/en
Application granted granted Critical
Publication of RU2196296C2 publication Critical patent/RU2196296C2/en

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Claims (1)

Способ измерения относительных деформаций конструкций при подключении тензорезисторов к тензометрической системе, заключающийся в том, что кабели датчиков подсоединяют к разъемам коммутатора по четырехпроводной схеме, измеряет отклонения сопротивлений тензорезисторов от величины сопротивления опорного резистора, проводят метрологическую поверку системы, определяют коэффициент преобразования и измеряют величину сопротивления опорного резистора, отличающийся тем, что кабели датчиков подсоединяют к тензорезисторам по двухпроводной схеме, измеряют сопротивление соединительных проводов, устанавливают величину опорного резистора, равную сумме номинального сопротивления тензорезистора и сопротивления соединительных проводов от тензорезистора до коммутатора, по измеренным значениям на каждой ступени нагружения конструкции определяют величину относительной деформации по формуле
Figure 00000001
,
где Ni - измеренное значение отклонения суммарного сопротивления тензорезистора и соединительных проводов от величины сопротивления опорного резистора Rк на i-ой ступени нагружения конструкции;
No - изморенное значение отклонения суммарного сопротивления тензорезистора и соединительных проводов от величины сопротивления опорного резистора Rк при величине нагрузки на конструкцию равной нулю;
S - тензочувствительность тензорезистора;
rл - величина сопротивления одного соединительного провода от тензорезистора до коммутатора датчиков;
А - коэффициент преобразования - тангенс угла наклона линейной зависимости показаний системы к оси приращения сопротивлений.A method for measuring the relative deformations of structures when connecting strain gauges to a strain gauge system, which consists in the fact that the sensor cables are connected to the switch connectors in a four-wire circuit, measures the deviations of the resistance of the strain gauges from the resistance value of the reference resistor, metrologically calibrates the system, determines the conversion coefficient and measures the resistance value of the reference resistor, characterized in that the sensor cables are connected to the strain gauges through a two-wire oh circuit, measure the resistance of the connecting wires, set the value of the reference resistor equal to the sum of the nominal resistance of the strain gauge and the resistance of the connecting wires from the strain gauge to the switch, from the measured values at each stage of loading of the structure, determine the value of the relative deformation by the formula
Figure 00000001
,
where N i is the measured value of the deviation of the total resistance of the strain gauge and the connecting wires from the resistance value of the reference resistor R to the i-th stage of loading of the structure;
N o - the measured value of the deviation of the total resistance of the strain gauge and the connecting wires from the resistance value of the reference resistor R to when the load on the structure is equal to zero;
S is the strain sensitivity of the strain gauge;
r l - the resistance value of one connecting wire from the strain gauge to the sensor switch;
A - conversion coefficient - the slope of the linear dependence of the readings of the system to the axis of increment of resistance.
RU2000101990A 2000-01-28 2000-01-28 Procedure measuring relative deformation of structures while resistance strain gauges are connected to tensometer system RU2196296C2 (en)

Priority Applications (1)

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RU2000101990A RU2196296C2 (en) 2000-01-28 2000-01-28 Procedure measuring relative deformation of structures while resistance strain gauges are connected to tensometer system

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Application Number Priority Date Filing Date Title
RU2000101990A RU2196296C2 (en) 2000-01-28 2000-01-28 Procedure measuring relative deformation of structures while resistance strain gauges are connected to tensometer system

Publications (2)

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RU2000101990A true RU2000101990A (en) 2001-10-27
RU2196296C2 RU2196296C2 (en) 2003-01-10

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