FLUERIC PRESSURE- AND TEMPERATURE-INSENSITIVE OSCILLATOR FOR TIMER APPLICATION
HARRY DIAMOND LABS ADELPHI MD
Pagination or Media Count:
Three fluid relaxation oscillators using R-C-R feedback loops were tested to establish the feedback resistances required to make the oscillator frequency insensitive to temperature and pressure. The frequency of the three oscillators, geometrically similar but with different feedback resistances, was measured as a function of stagnation pressure and temperature. With modifications guided by these data, one of the oscillators showed frequency variations of less than 2 percent with changes in input pressure of 6 to 30 psig and changes in temperature of 75 to 200F. A theoretical analysis indicates that an oscillator frequency simultaneously insensitive to temperature and pressure can be achieved using a lumped R-C-R network in the feedback loop.
- Fluidics and Fluerics
- Test Facilities, Equipment and Methods