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Method and apparatus for compensating a sensor Patent #: 4198677
ApplicationNo. 06/104590 filed on 12/14/1979
US Classes:702/104, Sensor or transducer374/171, With digital linearizing circuitry376/247, Temperature or pressure measurement73/313With electrically controlled indicator
ExaminersPrimary: Wise, Edward J.
Attorney, Agent or Firm
International ClassesG01L 9/06 (20060101)
G01L 27/00 (20060101)
G01D 3/02 (20060101)
AbstractA sensor correction circuit uses a programmable read only memory (PROM) for storing characterizing information for an associated sensor or transducer. The information is stored in the 1×2048 bit configuration. The programmable read-only memory (PROM) has its parallel outputs connected to corresponding inputs of a 2048 bit shift register. The programmable read-only memory and the shift register are located in an electronic circuit housing, along with a power supply and sensor signal handling electronics, attached to the sensor structure to form an integral package therewith. An isolation interface is mounted on the housing and is connected between the circuit within the housing and an external data processing and interrogating system which may include a microprocessor. The programmable read-only memory is used to store sensor characterizing information for providing sensor correction data to the microprocessor controlled data processing system and to supply this information upon demand by the data processing system to the shift register for read-out through the isolation interface to the interrogating data processing system. The isolation interface may include signal isolators used to transmit the signals for controlling the programmable read-only memory and the shift register and for supplying power to the power supply to energize the shift register and the sensor signal handling electronics.