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Intelligent input/output temperature sensor and calibration method therefor

  • US 6,283,628 B1
  • Filed: 09/11/1998
  • Issued: 09/04/2001
  • Est. Priority Date: 09/11/1998
  • Status: Expired due to Fees
First Claim
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1. A method for calibrating an intelligent input/output (I/O) temperature sensor, the temperature sensor having a temperature sensing element which generates a plurality of digital data samples indicative of the temperature proximate to the temperature sensing element;

  • a digital processor directly coupled to said temperature sensing element which generates a plurality of compensated digital data from said samples and a digital compensation value;

    a rewritable memory directly coupled to said processor which persistently stores, in updatable fashion, said digital compensation value and data representing the plurality of digital data samples, operatively coupled to a programming device; and

    a multi-master communication interface for communicating said digital data and at least one instruction for the digital processor with a communication bus of a sensor network, wherein said temperature sensing element, said digital processor and said memory are formed on a single substrate, said method comprising the steps of;

    determining an actual temperature first digital data indicative of an actual temperature measured by the temperature sensor;

    reading uncompensated temperature second digital data from said temperature sensing element;

    calculating the digital compensation value based on said first and second digital data;

    storing said digital compensation value in said memory for subsequent use by said digital processor;

    storing data representing a plurality of digital historical temperature data samples in said memory; and

    communicating said digital data and information defining the digital compensation value through the multi-master communication interface and the sensor network with said programming device.

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