Data recovery scheme in thermometer system
First Claim
1. A transmitter unit comprising:
- a sensor for generating a sensor signal having a characteristic that is representative of a variable, a measurement device for receiving the sensor signal, repeatedly measuring said characteristic, and generating an output signal representing a succession of measured values of the characteristic, a packetizer for receiving the measured values from the measurement device and generating a succession of transmission packets each including a more recently measured value and a less recently measured value, wherein the more recently measured value that is included in an earlier packet is included in a later packet as the less recently measured value, and a transmitter for receiving the succession of transmission packets from the packetizer and transmitting the succession of transmission packets.
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Accused Products
Abstract
A telemetry system includes a transmitter unit that measures a first value of a parameter, incorporates the first value in a first data packet and transmits the first data packet, and measures a second value of the parameter, incorporates the second value and the first value in a second data packet and transmits the second data packet. A receiver unit periodically receives a signal and generates a sequence of bits therefrom, determines whether the sequence of bits includes a payload that meets a predetermined standard and, if so, recovers a more recent datum from the payload else enters a data recovery mode. In the data recovery mode, the receiver unit receives a transmission signal and generates a second sequence of bits and determines whether the second sequence of bits contains a payload that meets the predetermined standard and, if so, recovers both a more recent datum and a less recent datum from the payload.
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Citations
14 Claims
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1. A transmitter unit comprising:
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a sensor for generating a sensor signal having a characteristic that is representative of a variable, a measurement device for receiving the sensor signal, repeatedly measuring said characteristic, and generating an output signal representing a succession of measured values of the characteristic, a packetizer for receiving the measured values from the measurement device and generating a succession of transmission packets each including a more recently measured value and a less recently measured value, wherein the more recently measured value that is included in an earlier packet is included in a later packet as the less recently measured value, and a transmitter for receiving the succession of transmission packets from the packetizer and transmitting the succession of transmission packets. - View Dependent Claims (2, 3, 4, 5)
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6. A receiver unit comprising:
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a receiver for receiving a signal and recovering a sequence of bits from the received signal, a packet check means for determining whether the sequence of bits meets a predetermined standard and, if so, recovering a more recent datum from the sequence of bits else entering a data recovery mode and determining whether a sequence of bits subsequently recovered from the transmission signal meets said predetermined standard and, if so, recovering both a more recent datum and a less recent datum from the subsequent sequence of bits. - View Dependent Claims (7, 8, 9)
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10. A telemetry system comprising a transmitter unit and a receiver unit wherein:
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the transmitter unit comprises;
a sensor for generating a sensor signal having a characteristic that is representative of a variable, a measurement device for receiving the sensor signal, repeatedly measuring said characteristic, and generating an output signal representing a succession of measured values of the characteristic, a packetizer for receiving the measured values from the measurement device and generating a succession of transmission packets each including a more recently measured value and a less recently measured value, wherein the more recently measured value that is included in an earlier packet is included in a later packet as the less recently measured value, and a transmitter for receiving the succession of transmission packets from the packetizer and transmitting the succession of transmission packets; and
the receiver unit comprises;
a receiver for receiving a signal and recovering a sequence of bits from the received signal, a packet check means for determining whether the sequence of bits meets a predetermined standard and, if so, recovering a more recent datum from the sequence of bits else entering a data recovery mode and determining whether a sequence of bits subsequently recovered from the transmission signal meets said predetermined standard and, if so, recovering both a more recent datum and a less recent datum from the subsequent sequence of bits. - View Dependent Claims (11)
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12. A method of operating a telemetric transmitter unit that periodically measures the value of a parameter and periodically and sequentially transmits the measured values, the method comprising:
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measuring a first value of the parameter, incorporating the first value in a first data packet, and transmitting the first data packet, and measuring a second value of the parameter, incorporating the second value and the first value in a second data packet, and transmitting the second data packet.
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13. A method of operating a telemetric receiver unit, the method comprising:
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periodically receiving a signal and generating a sequence of bits therefrom, determining whether the sequence of bits includes a payload that meets a predetermined standard and, if so, recovering a more recent datum from the payload else entering a data recovery mode, and in the data recovery mode receiving a signal and generating a second sequence of bits and determining whether the second sequence of bits contains a payload that meets said predetermined standard and, if so, recovering both a more recent datum and a less recent datum from the payload.
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14. A method of operating a telemetry system that comprises a transmitter unit and a receiver unit, wherein the transmitter unit operates in accordance with a method that comprises:
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measuring a first value of a parameter, incorporating the first value in a first data packet and transmitting the first data packet, and measuring a second value of the parameter, incorporating the second value and the first value in a second data packet and transmitting the second data packet;
and the receiver unit operates in accordance with a method that comprises;
periodically receiving a signal and generating a sequence of bits therefrom, determining whether the sequence of bits includes a payload that meets a predetermined standard and, if so, recovering a more recent datum from the payload else entering a data recovery mode, and in the data recovery mode receiving a transmission signal and generating a second sequence of bits and determining whether the second sequence of bits contains a payload that meets said predetermined standard and, if so, recovering both a more recent datum and a less recent datum from the payload.
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Specification