Infrasound sensor
OwnerRobert E. Schendelinventor
Life of this patent
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Abstract
An infrasonic pressure wave sensor apparatus is provided to detect infrasonic pressure waves generated by such means as an air-burst detonation. The infrasonic pressure wave sensor comprises a Doppler transceiver utilizing a microwave emitting device, such as a Gunn diode, and a microwave receiving device, such as a receiver diode. The infrasonic pressure wave sensor also comprises a reflective diaphragm, such as a conductive rubber or conductive plastic diaphragm. The microwave emitting device and microwave receiving device cooperate to measure the deflections in the reflective diaphragm as the reflective diaphragm is exposed to infrasonic pressure waves. The infrasonic pressure wave sensor yields a 2 V signal while remains extremely sensitive to pressure waves having a frequency of less than 1 Hz.
Claims17
An apparatus for detecting pressure waves, comprising:
- an emitting device for emitting a signal;
- a diaphragm on which the signals from the emitting device impinge and from which a portion of said signals are reflected;
- and
- a receiving device which receives signals reflected from the diaphragm and produces an output representative of the magnitude of the pressure wave.
A method for detecting pressure waves, comprising the steps of:
- disposing a diaphragm such that an externally generated pressure wave causes the diaphragm to deflect;
- providing an emitting device to produce signals which impinge on and are reflected from the diaphragm;
- receiving a portion of the reflected signals by a receiving device;
- and
- generating an output signal from the receiving device which is representative of the magnitude of the pressure wave.
Dependencies are inferred from the claim text.