Vehicle driving condition detecting apparatus

Details Vehicle driving condition detecting apparatus Vehicle driving condition detecting apparatus

1991-10-21

1992-08-18

Ng, Jin F.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340584, 374183, 374144, 307310, B60Q 100

Patent

active

051403021

ABSTRACT:
The output of a water temperature sensor is converted into a voltage signal by a first set of resistors. The voltage signal is then converted into a digital signal, which is supplied to a microcomputer for various controls. If the first set of resistors is so set that the voltage change provides optimum representation of temperature variations in a low-temperature range, the measuring accuracy in a high-temperature range becomes degraded. To improve the accuracy in the high-temperature range, the signal from the water temperature sensor is converted into a voltage signal through a second set of resistors--which is optimumly adjusted for the high-temperature range--by turning on a transistor. Thus, the sensor signal-voltage conversion means can be switched between the two conversion characteristics according to whether the temperature being measured is in the low- or high-temperature range, thereby providing high measuring accuracy in a wide range of temperatures.

REFERENCES:
patent: 4699520 (1987-10-01), Wallenfang
patent: 4845469 (1989-07-01), Benda
"Peripheral Circuit", p. 55 of a 1987 Japanese publication on semiconductor sensors.

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