JPS5566719A - Interface or liquid level detecting method and detecting terminal thereof - Google Patents
Interface or liquid level detecting method and detecting terminal thereofInfo
- Publication number
- JPS5566719A JPS5566719A JP13939178A JP13939178A JPS5566719A JP S5566719 A JPS5566719 A JP S5566719A JP 13939178 A JP13939178 A JP 13939178A JP 13939178 A JP13939178 A JP 13939178A JP S5566719 A JPS5566719 A JP S5566719A
- Authority
- JP
- Japan
- Prior art keywords
- detecting
- terminal
- interface
- variation
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
PURPOSE: To detect interface, etc. for a long period of time with high accuracy and stability, by regarding variation of interface, etc. of liquid in a reactor as variation of electrostatic capacity between a detecting terminal and a grounding terminal, and comparing an emission frequency by this variation with the base frequency.
CONSTITUTION: A detecting element 11a is surrounded by an insulation material, and a detecting terminal 11e is made to penetrate from the element 11a through the insulation material and exposed to the interface. Thus composed detecting terminal 11 is attached onto side wall of a reactor 10 and adjusted so that resonance coil of an oscillation element 13 connected to the detecting terminal 11 produce the maximum resonance at an oscillation frequency corresponding to the base liquid surface. When the liquid interface varies in this condition, the oscillation frequency varies in accordance with variation of electrostatic capacity between the detection terminal 11 and a grounding terminal. This oscillation frequency is compared with the base frequency, and the difference is taken out as a liquid level control signal from an output section 16 through a detecting section 14 and an amplifying element 15. Liquid surface can be detected with high accuracy and stability for a long period of time in this manner.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13939178A JPS5566719A (en) | 1978-11-14 | 1978-11-14 | Interface or liquid level detecting method and detecting terminal thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13939178A JPS5566719A (en) | 1978-11-14 | 1978-11-14 | Interface or liquid level detecting method and detecting terminal thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5566719A true JPS5566719A (en) | 1980-05-20 |
Family
ID=15244198
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13939178A Pending JPS5566719A (en) | 1978-11-14 | 1978-11-14 | Interface or liquid level detecting method and detecting terminal thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5566719A (en) |
-
1978
- 1978-11-14 JP JP13939178A patent/JPS5566719A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS57168169A (en) | Electrostatic capacitance detector | |
JPS545524A (en) | Flow rate control oscillator circuit for shopper control | |
JPS5566719A (en) | Interface or liquid level detecting method and detecting terminal thereof | |
JPS57355A (en) | Injection timing detector | |
JPS5336268A (en) | Level detecting circuit of liquid | |
JPS55114981A (en) | Object detection method and its unit | |
JPS57132005A (en) | Detector for extent of movement | |
JPS5315872A (en) | Dew detector | |
JPS5443772A (en) | Level detector of tuning fork type | |
JPS5518983A (en) | Liquid level detector | |
JPS5495067A (en) | Mill coating detection method | |
JPS54135585A (en) | Electrostatic capacity type measuring apparatus | |
JPS5560801A (en) | Displacement detector | |
JPS5672317A (en) | Detector for knocking oscillation | |
JPS5664619A (en) | Fuel guage | |
JPS5573906A (en) | Recording bias regulator | |
JPS54149577A (en) | Ultrasonic wire bonder | |
JPS5724804A (en) | Detector for crack depth | |
JPS5363083A (en) | Detecting circuit for minute changing quantity | |
JPS54118899A (en) | Humidity detector | |
JPS5630546A (en) | Ultrasonic humidifier | |
JPS54135584A (en) | Electrostatic capacity type measuring apparatus | |
JPS55121147A (en) | Detection unit using electroacoustic conversion element | |
JPS5598337A (en) | Detecting method for uneven portion in liquid | |
JPS55140167A (en) | Fault detector |