Gas sensor
First Claim
1. A gas-sensor device for detection of the presence and concentration of a gas, said gas-sensor device comprising:
- (a) an L-shaped housing having a first transmitter end, a second gas outflow end, a junction receiver end, and a gas inlet port through said L-shaped housing proximal to said first transmitter end, said gas inlet port permitting flow-through access of said gas to be detected;
(b) a transmitter assembly having a transmitter/transducer and a temperature sensor positioned in said first transmitter end, said transmitter/transducer having means for generating sound waves for passing through said gas within said L-shaped housing;
(c) a gas outflow end cap assembly having a sonic baffle and a gas outlet port positioned in said second gas outflow end, said sonic baffle having means for reducing reflection of said sound waves within the said L-shaped housing;
(d) a receiver assembly having a receiver/transponder for receipt of said sound waves positioned in said junction receiver end; and
(e) a sound buffer means for reduction of reflected sound waves, said sound buffer means engaged to said L-shaped housing, said first transmitter end, said second gas outflow end, and to said receiver assembly.
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Accused Products
Abstract
The invention relates to an oxygen sensor which measures the concentration of oxygen based upon ultrasonic sound waves traveling through a binary gas. The measured sound-wave delay through the gases determines the concentration level for oxygen within the transducer chamber. The invention includes an L-shaped housing where a transmitter/transducer is attached to one end of the housing and the receiver/transponder is positioned at the junction between the two substantially straight portions of the L-shaped housing. A straight transducer chamber is thereby provided, while simultaneously provided a housing design which minimizes reflected standing waves for detection by the receiver/transponder. The invention includes a sonic baffle positioned at the opposite end of the L-shaped housing from the transmitter/transducer which minimizes standing waves thereby improving the performance of the gas detection device. The invention also includes a sound buffer affixed to the interior of the L-shaped housing which further reduces the existence and reflection of standing waves for detection by the receiver/transponder. Temperature is monitored within the transducer chamber by an angularly offset temperature sensor.
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Citations
46 Claims
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1. A gas-sensor device for detection of the presence and concentration of a gas, said gas-sensor device comprising:
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(a) an L-shaped housing having a first transmitter end, a second gas outflow end, a junction receiver end, and a gas inlet port through said L-shaped housing proximal to said first transmitter end, said gas inlet port permitting flow-through access of said gas to be detected; (b) a transmitter assembly having a transmitter/transducer and a temperature sensor positioned in said first transmitter end, said transmitter/transducer having means for generating sound waves for passing through said gas within said L-shaped housing; (c) a gas outflow end cap assembly having a sonic baffle and a gas outlet port positioned in said second gas outflow end, said sonic baffle having means for reducing reflection of said sound waves within the said L-shaped housing; (d) a receiver assembly having a receiver/transponder for receipt of said sound waves positioned in said junction receiver end; and (e) a sound buffer means for reduction of reflected sound waves, said sound buffer means engaged to said L-shaped housing, said first transmitter end, said second gas outflow end, and to said receiver assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A gas-sensor device for detection of the presence and concentration of a gas, said gas-sensor device comprising:
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(a) an L-shaped housing having a first transmitter end, a second gas outflow end, a junction receiver end, and a gas inlet port through said L-shaped housing proximal to said first transmitter end, said gas inlet port permitting flow-through access of said gas to be detected; (b) a transmitter assembly having a transmitter/transducer and a temperature sensor positioned in said first transmitter end, said transmitter/transducer having means for generating sound waves for passing through said gas within said L-shaped housing; (c) a gas outflow end cap assembly having a sonic baffle and a gas outlet port positioned in said second gas outflow end, said sonic baffle having means for reducing reflection of said sound waves within said L-shaped housing; (d) a receiver assembly having a receiver/transponder means for receipt of said sound waves, positioned in said junction receiver end; and (e) a fabric insert for reduction of reflected sound waves, said fabric insert being positioned within said L-shaped housing and being further engaged to said first transmitter end, said transmitter assembly, said second gas outflow end, said gas outflow end cap assembly, and to said receiver assembly. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification