PRESSURE SENSING SYSTEM AND METHOD
First Claim
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1. A system for determining the pressure within a pressured body comprising transducer means adapted to be placed on the exterior of said body to direct an interrogating sonic signal into said body;
- passive sonic transponder means adapted to be implanted within said body having a mechanical and sonic resonant frequency varied by said pressure within said body, said transponder means being caused to resonate by receiving said interrogating sonic signal and emitting a different sonic resonance signal;
sonic receiver means adapted to be placed on the exterior of said body to receive said sonic resonance signal; and
output means connected to said sonic receiver means to convert said sonic resonance signal to data related to said pressure within said pressured body.
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Abstract
A pressure sensing system for measuring fluid pressure of a living body employs a resonant sonic transponder implanted inside the living body. The resonant frequency of the transponder is a function of the fluid pressure impinging on the transponder. A sound signal is directed from the exterior of the body to the transponder, causing the transponder to emit a resonance signal. The resonance signal is received at the exterior of the body and converted to fluid pressure data.
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Citations
2 Claims
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1. A system for determining the pressure within a pressured body comprising transducer means adapted to be placed on the exterior of said body to direct an interrogating sonic signal into said body;
- passive sonic transponder means adapted to be implanted within said body having a mechanical and sonic resonant frequency varied by said pressure within said body, said transponder means being caused to resonate by receiving said interrogating sonic signal and emitting a different sonic resonance signal;
sonic receiver means adapted to be placed on the exterior of said body to receive said sonic resonance signal; and
output means connected to said sonic receiver means to convert said sonic resonance signal to data related to said pressure within said pressured body.
- passive sonic transponder means adapted to be implanted within said body having a mechanical and sonic resonant frequency varied by said pressure within said body, said transponder means being caused to resonate by receiving said interrogating sonic signal and emitting a different sonic resonance signal;
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2. A method for determining the pressure within a pressured body comprising the steps of implanting a sonic transponder within said pressured body, said transponder having a mechanical and sonic resonance frequency varying with said pressure;
- directing an interrogating sonic signal at said transponder, causing said transponder to resonate and emit a sonic resonance signal;
receiving said sonic resonance signal outside said body; and
converting the frequency of said sonic resonance signal to data related to said pressure within said pressured body.
- directing an interrogating sonic signal at said transponder, causing said transponder to resonate and emit a sonic resonance signal;
Specification