| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid level-measuring device for accurately measuring the upper surface level of liquid without measuring the temperature, pressure data or the like in a container and without requiring any physical data of liquid to be measured when measuring the upper surface level of liquid being accommodated in the container. SOLUTION: In the liquid level-measuring device for measuring the level of the upper surface of liquid being accommodated in a container, an ultrasonic sensor for detecting the reflection wave of ultrasonic waves being emitted from the outer surface of a bottom part to the upper portion in the container is mounted to the outer surface of the bottom part of the container, and an ultrasonic reflection member that is at a preset measurement reference height position in ultrasonic liquid being emitted from the ultrasonic sensor and reflects the ultrasonic waves to the sensor side is provided at the lower portion of the container, thus effectively utilizing the ultrasonic detection characteristics for obtaining two kinds of ultrasonic data and accurately measuring the amount of accommodated liquid. |
