发明名称 LIQUID LEVEL DETECTION DEVICE, LIQUID SUPPLY CONTROL DEVICE AND LIQUID DELIVERY SYSTEM
摘要 PROBLEM TO BE SOLVED: To solve the problems that, when an ultrasonic sensor installed on the bottom of a container is used, the liquid in the container is stirred by the momentum of injected liquid to billow the liquid surface at the liquid supplying time to the container, and that thereby the ultrasonic wave hardly returns to the bottom of the container because of irregular reflection of the ultrasonic wave on the liquid surface, to thereby disable accurate liquid level measurement. SOLUTION: This device is equipped with a first liquid level sensor installed on the bottom part of the liquid container, for detecting the liquid level by the ultrasonic wave, and a second liquid level sensor installed on a part except the bottom part of the liquid container. It is determined whether the liquid reaches a prescribed liquid level position or not based on the detection result by the first and second liquid level sensors, to thereby permit accurate measurement of the liquid level in the container both at the usually using time and at the liquid supplying time.
申请公布号 JP2002031563(A) 申请公布日期 2002.01.31
申请号 JP20000214584 申请日期 2000.07.14
申请人 YAMATAKE CORP 发明人 SUZUKI OSAMU;KANEKO MAKOTO;DOBASHI YASUHIKO
分类号 G01F23/28;B67D7/32;B67D7/78;G01F25/00;(IPC1-7):G01F23/28;B67D5/60;B67D5/32 主分类号 G01F23/28
代理机构 代理人
主权项
地址