Oscillating hot wire of hot film flow sensor

Details Oscillating hot wire of hot film flow sensor Oscillating hot wire of hot film flow sensor

2005-06-07

2005-06-07

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Volume or rate of flow

Thermal type

Reexamination Certificate

active

06901795

ABSTRACT:
This invention is a flow measurement device that has high spatial (less than 1.0×1.0 mm2) and temporal resolution (greater than 10 s to 100 s kHz) to measure flow properties in unsteady and direction-reversing conditions. The present invention can have an oscillating substrate, hot wire prongs, a hot wire attached to the hot wire prong, sensor leads from the prongs to a constant temperature anemometry circuit (CTA), means for the oscillating substrate to oscillate the substrate at a frequency greater than a characteristic cycle frequency of the flow to be measured, at a frequency less than a CTA bandwidth frequency, and such that a frequency and amplitude (Aw) of oscillation are sufficiently large to be detected, and means to obtain two measurements during an oscillation cycle when the hot wire is at its maximum oscillation velocity. Alternatively, the prongs can be eliminated and a hot wire or hot film can be directly applied to the oscillating substrate.

REFERENCES:
patent: 4471655 (1984-09-01), Obayashi et al.
patent: 4604895 (1986-08-01), Watkins

Affiliated with

Also associated with

Rating

Oscillating hot wire of hot film flow sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oscillating hot wire of hot film flow sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oscillating hot wire of hot film flow sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3512998