Weather data transmitting system
First Claim
1. A system for transmitting a temperature sensed by a sensor disposed at a first location to a second location by modulation of a carrier, with a signal which is a function of the sensed temperature, transmitted by atmospheric transmission of the carrier between the first and second locations comprising:
- (a) a transmitter, which is cyclically turned on to transmit the carrier modulated by the sensed temperature during a first time interval and turned off during a second time interval;
(b) a transmitter clock for controlling the cyclical turning on and off of the transmitter during the first and second time intervals;
(c) a battery power supply for providing operating power to the transmitter when turned on and power continually to the transmitter clock;
(d) a receiver, disposed at the second location, which is cyclically turned on for receiving the modulated carrier during a third time interval and turned off during a fourth time interval, the receiver including means for detecting the signal modulating the carrier, means for displaying the sensed temperature, and a receiver clock for controlling the cyclical turning on and off of the receiver during the third and fourth time intervals, the fourth time interval starting in response to a change in a level of the received modulated carrier; and
(e) a battery power supply for providing operating power to the receiver when turned on and power continually to the receiver clock.
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Accused Products
Abstract
A system is disclosed for transmitting a sensed temperature from a transmitter to a remote receiver over a modulated carrier through the atmosphere. The transmitter and the receiver are battery powered and include timing circuitry having low power consumption. The transmitter and the receiver are both cyclically turned on for a relatively short period and off for a relative long period with the receiver'"'"'s on cycle being synchronized with the occurrence of the transmission of the modulated carrier. The receiver further employs techniques to minimize the effect of noise on the reception of the transmitted data which can occur from extraneous signal sources broadcasting in the same frequency band or from environmental noise.
87 Citations
23 Claims
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1. A system for transmitting a temperature sensed by a sensor disposed at a first location to a second location by modulation of a carrier, with a signal which is a function of the sensed temperature, transmitted by atmospheric transmission of the carrier between the first and second locations comprising:
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(a) a transmitter, which is cyclically turned on to transmit the carrier modulated by the sensed temperature during a first time interval and turned off during a second time interval; (b) a transmitter clock for controlling the cyclical turning on and off of the transmitter during the first and second time intervals; (c) a battery power supply for providing operating power to the transmitter when turned on and power continually to the transmitter clock; (d) a receiver, disposed at the second location, which is cyclically turned on for receiving the modulated carrier during a third time interval and turned off during a fourth time interval, the receiver including means for detecting the signal modulating the carrier, means for displaying the sensed temperature, and a receiver clock for controlling the cyclical turning on and off of the receiver during the third and fourth time intervals, the fourth time interval starting in response to a change in a level of the received modulated carrier; and (e) a battery power supply for providing operating power to the receiver when turned on and power continually to the receiver clock. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for transmitting data sensed by a sensor disposed at a first location to a second location by modulation of a carrier, with a signal which is a function of the sensed data, transmitted by atmospheric transmission of the carrier between the first and second locations comprising:
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(a) a transmitter, which is cyclically turned on to transmit the carrier modulated by the sensed data during a first time interval and turned off during a second time interval; (b) a transmitter clock for controlling the cyclical turning on and off of the transmitter during the first and second time intervals; (c) a battery power supply for providing operating power to the transmitter when turned on and power continually to the transmitter clock; (d) a receiver, disposed at the second location, which is cyclically turned on for receiving the modulated carrier during a third time interval and turned off during a fourth time interval, the receiver including means for detecting the signal modulating the carrier, and a receiver clock for controlling the cyclical turning on and off of the receiver during the third and fourth time intervals, the fourth time interval starting in response to a change in a level of the received modulated carrier and the fourth time interval being less than or equal to the duration of the second time interval; and (e) a battery powered supply for providing operating power to the receiver when turned on and power continually to the receiver clock.
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21. A system for transmitting a plurality of weather variables by a plurality of sensors disposed at a first location to a second location by time multiplex modulation of a carrier, with a plurality of time multiplexed signals which each signal being a function of a different weather variable, transmitted by atmospheric transmission of the carrier between the first and second locations comprising:
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(a) a transmitter, which is cyclically turned on to transmit the carrier which is modulated by time multiplexing by the sensed weather variables during a first time interval and turned off during a second time interval; (b) a transmitter clock for controlling the cyclical turning on and off of the transmitter during the first and second time intervals; (c) a battery power supply for providing operating power to the transmitter when turned on and power continually to the transmitter clock; (d) a receiver, disposed at the second location, which is cyclically turned on for receiving the modulated carrier during a third time interval and turned off during a fourth time interval, the receiver including means for detecting the time multiplexed signals modulating the carrier, means for displaying the plurality of weather variables and a receiver clock for controlling the cyclical turning on and off of the receiver during the third and fourth time intervals, the fourth time interval starting in response to a change in a level of the received modulated carrier; and (e) a battery power supply for providing operating power to the receiver when turned on and power continually to the receiver clock. - View Dependent Claims (22, 23)
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Specification