|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||364/562; 073/295; 073/304.R|
|우선권정보||JP-0093096 (1990-04-10); JP-0093097 (1990-04-10); JP-0251815 (1990-09-25); JP-0272435 (1990-10-12); JP-0002465 (1991-01-29)|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 6 인용 특허 : 13|
To eliminate an ambient temperature correcting sensor and further to improve the sensor response speed in a heat radiating type liquid level sensing system, a constant current pulse is periodically passed through a level sensor to heat it; level sensor voltages sampled at predetermined time intervals when the level sensor is being heated are divided by each initial sensor voltage to obtain sensor voltage ratios with respect to time; an approximate voltage is calculated on the basis of the the obtained ratios in accordance with an approximation equation; ...
1. A heat radiating type liquid level sensing system for sensing liquid level in a tank which is subject to being inclined, comprising: (a) a single resistive level sensor immersed in a liquid within a tank when said liquid is present in said tank; (b) a constant current generator connected across said resistive level sensor, (c) said constant current generator periodically generating a constant current pulse passed through said resistive level sensor in such a manner as to thereby generate radiating heat in said resistive level sensor and to genera...