JPS6093926U

JPS6093926U - Ultrasonic liquid level sensor

Info

Publication number: JPS6093926U
Application number: JP18744083U
Authority: JP
Inventors: 井谷　淳; 祖父江　英夫
Original assignee: 日本特殊陶業株式会社
Priority date: 1983-12-01
Filing date: 1983-12-01
Publication date: 1985-06-26

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は超音波を利用して液面レベルを検出する従来装
置を説明するために挙げた概略図、第２図は先行技術に
係る液面レベルセンサをタンクに取付けた態様を示し、
Ａは縦断正面図、ＢはＡ図イーイ線に沿って断面とした
平面図、第３図は本案の動作を説明するために挙げた概
略図で、Ａは液面が所定レベルライン以上にある状態、
Ｂは液面が所定レベルライン以下にある状態を示す。第
４図は先行技術に係るセンサの超音波受波器と液面との
接触状態を示す図、第５図は本案に係るセンサの要部縦
断面と該センサの超音波受波器と液面との接触状態を示
す図である。１・・・・・・栓体、２・・・・・・超音波送波器、２
１ａ・・・・・・送波面、３・・・・・・超音波受波器
、３１ａ・・・・・・受波面、４・・・・・・支柱、８
・・・・・・溌水性塗料、１・・・・・・液体、１　・
・・・・・液面、１　・・・・・・レベルライン、ｔ・
・・・・・タンク、Ｓ・・・・・・センサ取付は用部材
、ＳＰ・・・・・・レベルセンサ。尤−」−トノ−FIG. 1 is a schematic diagram used to explain a conventional device for detecting liquid level using ultrasonic waves, and FIG. 2 shows an embodiment in which a liquid level sensor according to the prior art is attached to a tank.
A is a longitudinal front view, B is a cross-sectional plan view taken along line E in Figure A, and Figure 3 is a schematic diagram used to explain the operation of the present invention. situation,
B indicates a state in which the liquid level is below a predetermined level line. FIG. 4 is a diagram showing the state of contact between the ultrasonic receiver of the sensor according to the prior art and the liquid surface, and FIG. It is a figure which shows the contact state with a surface. 1... Plug body, 2... Ultrasonic wave transmitter, 2
1a... Wave transmitting surface, 3... Ultrasonic wave receiver, 31a... Wave receiving surface, 4... Support column, 8
...Water repellent paint, 1...Liquid, 1 ・
...Liquid level, 1 ...Level line, t.
...Tank, S...Member for sensor installation, SP...Level sensor.尤-”-toneau-

Claims

[Scope of utility model registration request]

The sensor is mounted on the bottom wall of a tank containing liquid using a waterproof ultrasonic transmitter that emits ultrasonic pulses to a stopper that fits liquid-tightly into a member and a support that is installed upright on the stopper. A transducer and a waterproof ultrasonic receiver that generates electrical signals in response to emitted ultrasonic pulses are held so that their transmitting and receiving surfaces face each other at a predetermined distance. When the stopper is fitted to the sensor mounting member of the tank, either the ultrasonic transmitter or the ultrasonic receiver is above the liquid level line to be detected in the liquid, and the other is above the liquid level line to be detected. In a device configured to face the lower part of the level line, either the outer surface of the wave transmitting surface of the ultrasonic transmitter or the wave receiving surface of the ultrasonic receiver located above the level line is coated with water-repellent paint. An ultrasonic liquid level sensor that is characterized by: