CN202101730U - Inductive capacity type liquid level sensor - Google Patents
Inductive capacity type liquid level sensor Download PDFInfo
- Publication number
- CN202101730U CN202101730U CN2010206729968U CN201020672996U CN202101730U CN 202101730 U CN202101730 U CN 202101730U CN 2010206729968 U CN2010206729968 U CN 2010206729968U CN 201020672996 U CN201020672996 U CN 201020672996U CN 202101730 U CN202101730 U CN 202101730U
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- liquid level
- level sensor
- signal
- direct supply
- processing circuit
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model relates to an inductive capacity type liquid level sensor, comprising a direct current power supply, a signal process circuit and a capacity sensor, wherein one electrode of the capacity sensor is a folded conductor with an insulation layer which is vertically placed into the liquid, another electrode is a metal container wall; the power is supplied to the signal process circuit and the capacity sensor from the direct current power supply and the signal process circuit is used for sensing the signal variance of the capacity sensor and outputting the corresponding liquid level signal. The inductive capacity type liquid level sensor solves the technical problems of the prior liquid level sensor that: the structure is complicated and the volume is huge.
Description
Technical field
The utility model relates to a kind of liquid level sensor, particularly a kind of capacitance level transducer.
Background technology
Though existing liquid level sensor precision is very high, complex structure, manufacturing cost is high, can't large-scale application; Perhaps bulky, can't be applied to limited place, space.
The utility model content
The utility model purpose provides a kind of inductance capacitance formula liquid level sensor, and it has solved existing liquid level sensor complex structure, bulky technical matters.
The technical solution of the utility model is: a kind of inductance capacitance formula liquid level sensor comprises direct supply, signal processing circuit and capacitive transducer; It is characterized in that: an electrode of said capacitive transducer is for vertically putting into the doubling lead of a tape insulation layer of liquid, and another electrode is the canister wall; Said direct supply is to signal processing circuit and capacitive transducer power supply, and said signal processing circuit is used for the signal variation of sensitization capacitance sensor and exports corresponding liquid level signal.
Also comprise the display unit that is used to show liquid level.
Above-mentioned direct supply is the 24V direct supply.
Above-mentioned lead is a signal induction line.
A kind of inductance capacitance formula liquid level sensor comprises direct supply, signal processing circuit and capacitive transducer; It is characterized in that: an electrode of said capacitive transducer is for vertically putting into the doubling lead of a tape insulation layer of liquid, and another electrode is for vertically putting into the doubling lead of a tape insulation layer of liquid; Said direct supply is to signal processing circuit and capacitive transducer power supply, and said signal processing circuit is used for the signal variation of sensitization capacitance sensor and exports corresponding liquid level signal.
Also comprise the display unit that is used to show liquid level.
Above-mentioned direct supply is the 24V direct supply.
Above-mentioned lead is a signal induction line.
The utility model has the advantages that:
1, the utility model inductance capacitance formula liquid level sensor only need vertically be placed the lead of one or two doubling in liquid, with lead one or two electrode as capacitive transducer, is connected with corresponding signal processing circuit more again; Get final product detection at any time liquid level height; And show through digital display unit in real time, perhaps corresponding data output is supplied to report to the police or the automatic control system use, so the utlity model has simple in structure; Advantage easy to use, that cost of manufacture is low.
2, the sensor sensing element of the utility model has only the lead of one or two doubling, so it is little to take up room, can be widely used in occasions with limited space and uses, and for example is used for the Level Detection of washing machine.
2, the sensor sensing element of the utility model adopts the insulated conductor of doubling form, then need not in liquid, electrode to be carried out insulation processing, and is simple in structure.
4, the sensor sensing element of the utility model adopts the signal induction line of doubling form, because of it can tolerate various rugged surroundings, so the utility model can be applied to the place of many inclement conditions, applied range.
Description of drawings
Fig. 1 is the first example structure synoptic diagram of the utility model inductance capacitance formula liquid level sensor;
Fig. 2 is the second example structure synoptic diagram of the utility model inductance capacitance formula liquid level sensor;
Wherein: 1-direct supply and signal processing circuit, 2-display unit, 3-container, 4-lead, 5-liquid.
Embodiment
Referring to Fig. 1, first kind of inductance capacitance formula liquid level sensor is applied to the situation that chamber wall is a metal material, comprises direct supply, signal processing circuit and capacitive transducer; An electrode of capacitive transducer is for vertically putting into the doubling lead of a tape insulation layer of liquid, and another electrode is the canister wall; Direct supply is to signal processing circuit and capacitive transducer power supply, and signal processing circuit is used for the signal variation of sensitization capacitance sensor and exports corresponding liquid level signal.
Referring to Fig. 2, second kind of inductance capacitance formula liquid level sensor is applied to the situation that container is nonmetal wall, comprises direct supply, signal processing circuit and capacitive transducer; Two electrodes of its capacitive transducer are the doubling lead of a tape insulation layer vertically putting into liquid; Direct supply is to signal processing circuit and capacitive transducer power supply, and signal processing circuit is used for the signal variation of sensitization capacitance sensor and exports corresponding liquid level signal.Two kinds of inductance capacitance formula liquid level sensors also can comprise the display unit that is used to show liquid level.
Direct supply is the 24V direct supply.In order to be applied to rugged surroundings, lead preferably adopts signal induction line.
The utility model principle:
When the utility model uses, the insulation signal measurement line that is parallel to each other after the doubling is vertically put into liquid, the 220V alternating current is through converting the power supply of 24V direct supply guiding line to.Or the utility model is measured between lead and the chamber wall electric capacity between two leads; When liquid level changes; Or the condenser dielectric that the liquid between lead and the chamber wall between two leads is formed changes thereupon; Then electric capacity changes thereupon, and the size of the metering circuit of capacitive transducer (for example with the amplifier measuring circuit of capacitive transducer as backfeed loop) output voltage is directly proportional with changes in capacitance, same and liquid level be varied to direct ratio.
Claims (8)
1. an inductance capacitance formula liquid level sensor comprises direct supply, signal processing circuit and capacitive transducer; It is characterized in that: an electrode of said capacitive transducer is for vertically putting into the doubling lead of a tape insulation layer of liquid, and another electrode is the canister wall; Said direct supply is to signal processing circuit and capacitive transducer power supply, and said signal processing circuit is used for the signal variation of sensitization capacitance sensor and exports corresponding liquid level signal.
2. inductance capacitance formula liquid level sensor according to claim 1 is characterized in that: also comprise the display unit that is used to show liquid level.
3. inductance capacitance formula liquid level sensor according to claim 1 and 2 is characterized in that: said direct supply is the 24V direct supply.
4. inductance capacitance formula liquid level sensor according to claim 3 is characterized in that: said lead is a signal induction line.
5. an inductance capacitance formula liquid level sensor comprises direct supply, signal processing circuit and capacitive transducer; It is characterized in that: an electrode of said capacitive transducer is for vertically putting into the doubling lead of a tape insulation layer of liquid, and another electrode is for vertically putting into the doubling lead of a tape insulation layer of liquid; Said direct supply is to signal processing circuit and capacitive transducer power supply, and said signal processing circuit is used for the signal variation of sensitization capacitance sensor and exports corresponding liquid level signal.
6. inductance capacitance formula liquid level sensor according to claim 5 is characterized in that: also comprise the display unit that is used to show liquid level.
7. according to claim 5 or 6 described inductance capacitance formula liquid level sensors, it is characterized in that: said direct supply is the 24V direct supply.
8. inductance capacitance formula liquid level sensor according to claim 7 is characterized in that: said lead is a signal induction line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206729968U CN202101730U (en) | 2010-12-20 | 2010-12-20 | Inductive capacity type liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206729968U CN202101730U (en) | 2010-12-20 | 2010-12-20 | Inductive capacity type liquid level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202101730U true CN202101730U (en) | 2012-01-04 |
Family
ID=45387736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206729968U Expired - Fee Related CN202101730U (en) | 2010-12-20 | 2010-12-20 | Inductive capacity type liquid level sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202101730U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538906A (en) * | 2010-12-20 | 2012-07-04 | 西安隆润电子科技有限公司 | Induction capacitance type liquid level sensor |
| CN105795921A (en) * | 2015-12-04 | 2016-07-27 | 广东工业大学 | Automatic water calling device |
-
2010
- 2010-12-20 CN CN2010206729968U patent/CN202101730U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538906A (en) * | 2010-12-20 | 2012-07-04 | 西安隆润电子科技有限公司 | Induction capacitance type liquid level sensor |
| CN105795921A (en) * | 2015-12-04 | 2016-07-27 | 广东工业大学 | Automatic water calling device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20161220 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |