Sensor communication system for metal enclosures
First Claim
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1. A sensor transmitter for communicating wirelessly a presence of a condition within a metal enclosure, comprising:
- a power supply;
at least one sensor, individual ones of the at least one sensor senses a presence of a condition;
a low frequency generator positioned within a metal enclosure and electrically coupled to the power supply and the at least one sensor, the low frequency generator transmits a low frequency wireless signal of less than about 100 kHz indicative of the presence of the condition within the metal enclosure when the condition is present at the individual ones of the at least one sensor;
a comparison device electrically coupled between the at least one sensor and the low frequency generator; and
a magnetic field sensor electrically coupled between the power supply and the comparison device such that the sensor transmitter is not able to transmit the low frequency wireless signal indicative of the presence of the condition within the metal enclosure until the magnetic field sensor is placed within a magnetic field.
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Abstract
A sensor transmitter for communicating wirelessly a presence of a condition within a metal enclosure includes a power supply, at least one sensor where each sensor senses a presence of a condition, and a low frequency generator positioned within a metal enclosure and electrically coupled to the power supply and the at least one sensor. The low frequency generator transmits a low frequency wireless signal indicative of the presence of the condition within the metal enclosure when the condition is present at one sensor.
16 Citations
16 Claims
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1. A sensor transmitter for communicating wirelessly a presence of a condition within a metal enclosure, comprising:
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a power supply; at least one sensor, individual ones of the at least one sensor senses a presence of a condition; a low frequency generator positioned within a metal enclosure and electrically coupled to the power supply and the at least one sensor, the low frequency generator transmits a low frequency wireless signal of less than about 100 kHz indicative of the presence of the condition within the metal enclosure when the condition is present at the individual ones of the at least one sensor; a comparison device electrically coupled between the at least one sensor and the low frequency generator; and a magnetic field sensor electrically coupled between the power supply and the comparison device such that the sensor transmitter is not able to transmit the low frequency wireless signal indicative of the presence of the condition within the metal enclosure until the magnetic field sensor is placed within a magnetic field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for communicating a presence of a condition within a metal enclosure, comprising:
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using a sensor transmitter for communicating wirelessly the presence of the condition within the metal enclosure, the sensor comprises; a power supply, at least one sensor, individual ones of the at least one sensor senses a presence of a condition, a low frequency generator positioned within the metal enclosure and electrically coupled to the power supply and the at least one sensor, the low frequency generator transmits a low frequency wireless signal of less than about 100 kHz indicative of the presence of the condition within the metal enclosure when the condition is present at the individual ones of the at least one sensor, a comparison device electrically coupled between the at least one sensor and the low frequency generator, and a magnetic field sensor electrically coupled between the power supply and the comparison device such that the sensor transmitter is not able to transmit the low frequency wireless signal indicative of the presence of the condition within the metal enclosure until the magnetic field sensor is placed within a magnetic field, sensing a condition internal to a metal enclosure using at least one sensor; sensing a magnetic field using a magnetic field sensor; and transmitting the low frequency wireless signal of less than about 100 kHz using the low frequency generator due to the condition being present at the at least one sensor and the magnetic field sensor being placed within a magnetic field. - View Dependent Claims (12, 13)
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14. A system for communicating with a sensor within a metal enclosure comprising:
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a first power supply; one or more sensor transmitters internal to a metal enclosure, a first sensor transmitter comprising; a first sensor to detect a presence of a first condition, a first low frequency generator positioned within the metal enclosure and electrically coupled to the first power supply and the first sensor, and which transmits a first low frequency wireless signal of less than about 100 kHz when the first condition is present at the first sensor which is indicative of the presence of the condition within the metal enclosure, a first comparison device electrically coupled between the first sensor and the first low frequency generator, and a magnetic field sensor electrically coupled between the first power supply and the first comparison device such that the one or more sensor transmitters are not able to transmit the low frequency wireless signal indicative of the presence of the condition within the metal enclosure until the magnetic field sensor is placed within a magnetic field; and a receiver external to the metal enclosure that receives the first low frequency wireless signal indicative of the detection of the presence of the first condition. - View Dependent Claims (15, 16)
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Specification