Method and apparatus for the electric measurement of physical value, for example, measurement of mechanical stresses
Abstract
Resistance and reactance measuring devises are described with application to the following: Thermometer, bolometer, force transducer, moisture, magnetic field frequency, light intensity, stress. Several measuring bridges are presented, which incorporate compensating, amplifying and conditioning circuits. Applications include stress measurements in propellors of flying aircraft from ground stations. Stress shock pulses can be measured with the devices as well as high frequency stress pulses.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- May 1975
- Bibcode:
- 1975STIN...7522691Y
- Keywords:
-
- Electrical Measurement;
- Measuring Instruments;
- Propellers;
- Shock Loads;
- Stress Measurement;
- Bolometers;
- Magnetometers;
- Mechanical Properties;
- Mechanical Shock;
- Moisture Meters;
- Thermometers;
- Instrumentation and Photography