Title:
【発明の名称】ヒータ・エネルギ・カウンタを用いた温度センサ故障検出装置および方法
Document Type and Number:
Japanese Patent JP2815370
Kind Code:
B2
Abstract:
An improved temperature sensor failure detection arrangement for a temperature controlled heating device of the type having a heater, an electronic controller for controlling the power level applied to the heater, and a temperature sensor. The controller includes an internal heater energy counter, which is incremented and decremented at rates determined as a function of the power level applied to the heater such that the count of the heater energy counter approximately tracks the temperature of the heater. The controller periodically compares temperature information from the temperature sensor with the count of the heater energy counter to check for abnormal operating condition of the temperature sensor. An abnormal condition is detected when the count of the heater energy counter is within a predetermined reference range and the sensed temperature is outside a correlative predetermined reference temperature range, which ranges are selected such that under normal operating conditions, whenever the count is within the predetermined range, the temperature will be within the reference temperature range.
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Inventors:
Richard Edward Honan
Application Number:
JP24466688A
Publication Date:
October 27, 1998
Filing Date:
September 30, 1988
Export Citation:
Assignee:
GENERAL ELECTRIC COMPANY
International Classes:
F24C7/02; F24C15/10; G01K7/00; H05B3/00; G05D23/24; (IPC1-7): G05D23/24; G01K7/00
Domestic Patent References:
| JP5769424A | ||||
| JP60257332A | ||||
| JP58142410A | ||||
| JP60125533A | ||||
| JP54171094U |
Attorney, Agent or Firm:
Tokunji Ikunuma