Temperature abnormality detector for electronic apparatus

Details Temperature abnormality detector for electronic apparatus Temperature abnormality detector for electronic apparatus

1992-02-19

1993-10-19

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

307117, 374166, H02H 504

Patent

active

052551490

ABSTRACT:
According to this invention, in a temperature abnormality detector, an electronic apparatus can be continuously operated without halt, a failure of a sensor can be reliably detected, and power supply is interrupted to protect the electronic apparatus when the temperature of the electronic apparatus really reaches a high temperature. In addition, a highly reliable electronic apparatus which is not halted by erroneous detection can be provided, and repairing of the apparatus can be completed within a short time. Even when the apparatus fails, it can be easily restored.
The detector includes a plurality of temperature sensors arranged on an electronic part, a switching circuit for receiving output signals from the temperature sensors, a converting circuit for converting the output signals from the temperature sensors into temperature values, a microprocessor, output circuits of the microprocessor, and a ROM for storing a program for operating the microprocessor.

REFERENCES:
patent: 4122720 (1978-10-01), Podl
patent: 4198562 (1980-04-01), Mills et al.
patent: 4797670 (1989-01-01), Joyner
patent: 4940967 (1990-07-01), Smith
patent: 4975766 (1990-12-01), Umezawa
patent: 5066140 (1991-11-01), Beran
French Search Report, 9202159, Dec. 18, 1992.

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