CN202209976U - Electrode-type liquid level detection device - Google Patents
Electrode-type liquid level detection device Download PDFInfo
- Publication number
- CN202209976U CN202209976U CN2011202724461U CN201120272446U CN202209976U CN 202209976 U CN202209976 U CN 202209976U CN 2011202724461 U CN2011202724461 U CN 2011202724461U CN 201120272446 U CN201120272446 U CN 201120272446U CN 202209976 U CN202209976 U CN 202209976U
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- CN
- China
- Prior art keywords
- electrode
- shaping circuit
- liquid level
- level detection
- chip microcomputer
- 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.)
- Expired - Fee Related
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model discloses an electrode-type liquid level detection device, consisting of a liquid container, an electrode A, an electrode B, a shaping circuit part, a single chip microcomputer control part and connecting wires among the above parts, wherein the electrodes A and B are installed properly on the side surfaces of the liquid container, the electrode A is connected with the single chip microcomputer control part via a lead wire, the electrode B is connected with the shaping circuit part via a lead wire, and the shaping circuit part is connected with the single chip microcomputer control part via a lead wire. The device can effectively avoid the phenomenon of erroneous measurement, which is caused by wrong conduction owing to attachment of water drops in the container to the electrodes or interference from an external electric field during measurement, and the device has high reliability.
Description
Technical field
The utility model relates to the electric pole type liquid level detection device, in order to solve the Level Detection problem of electrode mode.
Background technology
In the prior art, Level Detection a kind of method comparatively commonly used be with the pair of conductive stainless steel screw as electrode, this is installed in position suitable in the container to electrode, an end ground connection of electrode, the other end is connected to the input pin of single-chip microcomputer.When liquid level in the container was not enough, electrode loop broke off, and the input pin that be connected to single-chip microcomputer this moment is a high level.When liquid level arrives the electrode installation site, the electrode loop conducting, the input pin that be connected to single-chip microcomputer this moment is a low level.Single-chip microcomputer just can judge whether liquid level reaches the height of appointment according to the height of the input pin level that is connected to single-chip microcomputer like this.
There is following shortcoming in said method: at first, during measurement in the container water droplet attached on the electrode or the interference of external electromagnetic field electrode is produced misleading, influence the reliability of Level Detection.Secondly, do not pass through shaping circuit owing to be connected to the signal of the input pin of single-chip microcomputer, single-chip microcomputer possibly can't detect this signal, causes the Level Detection failure.In addition, this method can't realize having the detection and liquid level detection of different electric conductivity liquid, function singleness.
The utility model content
The purpose of the utility model is the shortcoming to prior art, and the electric pole type liquid level detection device is provided.
The utility model is realized through following technical scheme: a pair of stainless steel screw is installed as conductive electrode in the appropriate location of tested container side; One end of electrode is connected to the output pin of single-chip microcomputer; Form the transmitting terminal that detects the loop; Another electrode is connected to the input pin of single-chip microcomputer through shaping circuit, forms the receiving end that detects the loop.During measurement, load square-wave signal, when liquid level in the container is not enough at transmitting terminal; The detection loop is broken off, and receiving end is detected to be low level signal, when liquid level reaches the electrode installation site; Detect the loop conducting, this moment receiving end to detect be square-wave signal.Receiving end detects and adopts the mode of repeatedly sampling to confirm, with the reliability of assurance device detection.Input reference voltage value in the shaping circuit in the comparer is adjustable to have guaranteed that this device can be applicable to the Level Detection of different electric conductivity liquid.
The utility model comprises Level Detection part, shaping circuit part and Single-chip Controlling part, and its structure is made up of the connecting line between liquid container, electrode A, electrode B, shaping circuit part, Single-chip Controlling part, the each several part; Electrode A and electrode B are installed in the appropriate location of liquid level container side, and electrode A partly is connected with Single-chip Controlling through lead, and electrode B partly is connected with shaping circuit through lead, and shaping circuit partly is connected with Single-chip Controlling through lead.
The beneficial effect of the utility model:
When this device can effectively be avoided measuring in the container water droplet attached on the electrode or external electromagnetic field interference produced misleads and the generation that causes mistake to measure phenomenon, have higher reliability.
Owing to through shaping circuit, can guarantee the stable input single-chip microcomputer of detection reception signal like this, so that this device has is stable preferably from the signal of the input pin of electrode receiving end to single-chip microcomputer.
This device can be realized having the Level Detection of different electric conductivity liquid, the detected object variation through the magnitude of voltage of comparer positive input in the adjustment shaping circuit.
This apparatus structure is succinct, and cost is low, and applicable situation is comparatively extensive.
Description of drawings
Fig. 1 is the structural representation of the utility model square-wave signal liquid level detection device.
Among the figure: 1, liquid container 2, electrode A 3, electrode B 4, liquid level position 5, connecting line
6, Single-chip Controlling part 7, connecting line 8, shaping circuit part 9, connecting line.
Embodiment
Below in conjunction with accompanying drawing embodiment is further described.
The utility model comprises Level Detection part, shaping circuit part and Single-chip Controlling part, and its structure is made up of the connection line between liquid container, electrode A, electrode B, shaping circuit part, Single-chip Controlling part, the each several part; Electrode A and electrode B are installed in the appropriate location of liquid level container side, and electrode A partly is connected with Single-chip Controlling through lead, and electrode B partly is connected with shaping circuit through lead, and shaping circuit partly is connected with Single-chip Controlling through lead.
Claims (1)
1. electric pole type liquid level detection device is characterized in that: said device is made up of the connecting line between liquid container, electrode A, electrode B, shaping circuit part, Single-chip Controlling part, the each several part; Electrode A and electrode B are installed in the appropriate location of liquid level container side, and electrode A partly is connected with Single-chip Controlling through lead, and electrode B partly is connected with shaping circuit through lead, and shaping circuit partly is connected with Single-chip Controlling through lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202724461U CN202209976U (en) | 2011-07-29 | 2011-07-29 | Electrode-type liquid level detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202724461U CN202209976U (en) | 2011-07-29 | 2011-07-29 | Electrode-type liquid level detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202209976U true CN202209976U (en) | 2012-05-02 |
Family
ID=45989521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202724461U Expired - Fee Related CN202209976U (en) | 2011-07-29 | 2011-07-29 | Electrode-type liquid level detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202209976U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489573A (en) * | 2018-04-11 | 2018-09-04 | 航天科技控股集团股份有限公司 | A kind of liquid level detection device of automobile cooling |
| CN108489573B (en) * | 2018-04-11 | 2024-06-04 | 航天科技控股集团股份有限公司 | Liquid level detection device of automobile cooling liquid |
-
2011
- 2011-07-29 CN CN2011202724461U patent/CN202209976U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489573A (en) * | 2018-04-11 | 2018-09-04 | 航天科技控股集团股份有限公司 | A kind of liquid level detection device of automobile cooling |
| CN108489573B (en) * | 2018-04-11 | 2024-06-04 | 航天科技控股集团股份有限公司 | Liquid level detection device of automobile cooling liquid |
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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: 20120502 Termination date: 20140729 |
|
| EXPY | Termination of patent right or utility model |