초록 ▼

A level sensing system including ultrasonic sound wave transducer means for emitting ultrasonic sound waves and for receiving ultrasonic sound waves reflected from a receptacle whose content level is to be sensed; a content level detector, responsive to the reflected ultrasonic sound waves, for dete

A level sensing system including ultrasonic sound wave transducer means for emitting ultrasonic sound waves and for receiving ultrasonic sound waves reflected from a receptacle whose content level is to be sensed; a content level detector, responsive to the reflected ultrasonic sound waves, for determining the level of the contents of the receptacle; a rim detector, responsive to the reflected ultrasonic sound waves, for determining the location of the rim of the receptacle; and a level comparator, responsive to the rim detector and the content level detector, for comparing the content level with the rim location for indicating when the content level and the rim location are a predetermined distance apart.

대표청구항 ▼

A level sensing system comprising: ultrasonic sound wave transducer means for emitting ultrasonic sound waves and for receiving ultrasonic sound waves reflected from a receptacle whose content level is to be sensed; a content level detector, responsive to said reflected ultrasonic sound waves, for d

A level sensing system comprising: ultrasonic sound wave transducer means for emitting ultrasonic sound waves and for receiving ultrasonic sound waves reflected from a receptacle whose content level is to be sensed; a content level detector, responsive to said reflected ultrasonic sound waves, for detecting the level of the contents of the receptacle; a rim detector, responsive to said reflected ultrasonic sound waves, for determining the location of the rim of the receptacle; and a flow valve for controlling the level of the contents of the receptacle; a receptacle detector, responsive to said rim detector, for actuating said flow valve when a receptacle is present; and a level comparator, responsive to said rim detector and said contents level detector, for comparing the contents level with the rim location for de-activating said flow valve when the contents are within a predetermined distance of the rim.