A compensation method for the temperature influence on hot-wire measurements
Abstract
For a temperature range of delta T not exceeding 24 C and velocities greater than 8 m/sec of the fluid flow the temperature influence on the bridge voltage of a hot-wire anemometer can be compensated by a temperature proportional voltage for accuracies of about 1% in the linearized output. This causes over-compensation for velocities less than 8 m/sec. By partially weighting the compensation voltage with the uncorrected bridge voltage (introduction of a nonlinearity) the application of this compensation method can be extended to low velocities. The compensation voltage is applied between bridge and linearized and has no influence on the linearization performed at cold temperature.
- Publication:
-
Zeitschrift fur Flugwissenschaften und Weltraumforschung
- Pub Date:
- April 1977
- Bibcode:
- 1977ZFlWe...1...81F
- Keywords:
-
- Error Correcting Devices;
- Flow Velocity;
- Hot-Wire Anemometers;
- Instrument Compensation;
- Temperature Effects;
- Error Analysis;
- Shear Layers;
- Volt-Ampere Characteristics;
- Instrumentation and Photography