CN2638041Y - Electric contact liquid level meter without corroding electrode - Google Patents
Electric contact liquid level meter without corroding electrode Download PDFInfo
- Publication number
- CN2638041Y CN2638041Y CN 03277268 CN03277268U CN2638041Y CN 2638041 Y CN2638041 Y CN 2638041Y CN 03277268 CN03277268 CN 03277268 CN 03277268 U CN03277268 U CN 03277268U CN 2638041 Y CN2638041 Y CN 2638041Y
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- 239000007788 liquid Substances 0.000 title abstract description 10
- 230000028161 membrane depolarization Effects 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000012360 testing method Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- SBWGZAXBCCNRTM-CTHBEMJXSA-N n-methyl-n-[(2s,3r,4r,5r)-2,3,4,5,6-pentahydroxyhexyl]octanamide Chemical compound CCCCCCCC(=O)N(C)C[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO SBWGZAXBCCNRTM-CTHBEMJXSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Measurement Of Current Or Voltage (AREA)
Abstract
The electric contact liquid level meter without corroding electrode consists of display control circuit, power supply circuit, single chip circuit, etc. The output end of the single chip circuit is connected with a depolarization circuit formed by a switch device and an electrode electrifying circuit, and is connected with a display and control circuit, the input end of the single chip circuit is connected with a voltage and current detection circuit formed by the switch device, the electrode electrifying control circuit is connected with a liquid level electrode, and the liquid level electrode is connected with a current and voltage detection circuit. The device uses common materials as electrodes, and the service life of the electrodes can reach more than 10 years. The device has the functions of automatic initialization test storage and self-compensation of the electrode resistance, can randomly wire without distinguishing wire numbers in the operation process of a connecting circuit, and is convenient to operate and high in reliability. And the debugging and the maintenance are convenient. Is suitable for use in household, business and industrial fields.
Description
Technical field
The utility model relates to a kind of liquid level emasuring device, particularly relates to a kind of remote level indicator of not corroding electrode, belongs to the automation instrument technology field.
Background technology
The structure of the remote level indicator of existing not corroding electrode is, adopt direct current or low-frequency and low-voltage to exchange to potential electrode, continue energising, and then by triode amplifier or other electron component composition signal deteching circuit, if the electric current that detects is big or resistance is little, then be considered as the electrode on, disconnect otherwise be considered as electrode.Use general electronic devices and components that the corresponding position of connecting electrode is indicated, but know the liquid level of corresponding liquid with regard to side.Its shortcoming is:
1, the electrode that inserts liquid is continued energising, can make potential electrode be lost the measurement effect by electrolytic corrosion and polarization very soon, general electrode material can only use 6 months.
If 2 electrodes that use special materials to make cost an arm and a leg, circuit and structure have limitation, electrode connection complexity in the installation, debugging maintenance trouble.
Summary of the invention
It is the control core with the single-chip microcomputer that the purpose of this utility model provides a kind of, is interrupted energising, the long service life of potential electrode, and handling safety is reliable, the remote level indicator of the not corroding electrode of low cost of manufacture.
To achieve these goals, the utility model adopts following technical proposals: this device is made of display control circuit, power circuit, single chip circuit.The output terminal of single chip circuit links to each other with the depolarization circuit that is made of switching device, electrifying electrodes circuit, be connected with demonstration and control circuit, its input end links to each other with the voltage that is made of switching device, current detection circuit, the electrifying electrodes control circuit is connected with level electrode, and level electrode is connected with the current/voltage testing circuit.
Owing to adopted above technical scheme, the utility model that can be reached more than 10 years the serviceable life of common survey electrode.This device can use the common wiring cable as electrode material system cost to be reduced, and has improved economic serviceability.In addition, this device has the auto-initiation test storage of electrode resistance and self compensation function, in the operating process of connection line, does not need to distinguish wire size wiring arbitrarily, and convenient and reliable operation is strong.Debug easy to maintenance.Be applicable to that family, commerce and industrial circle use.
Description of drawings
Fig. 1 is the utility model hardware principle block diagram.
Fig. 2 is the utility model schematic diagram.SW0, SW1 and SW2 are respectively the two ends of potential electrode among the figure.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Embodiment 1 is referring to Fig. 1.The utility model is made up of display control circuit, power circuit, single chip circuit, depolarization circuit, power-on switch circuit, voltage and current detection circuit.Single-chip microcomputer is selected according to the requirement of the quantity of potential electrode and cost, quality aspects.Single-chip microcomputer of the present utility model adopts MEGA8 to be equipped with additional device electric capacity composition single chip circuit.The output terminal of single chip circuit links to each other with depolarization circuit, electrifying electrodes circuit, be connected with demonstration and control circuit, its input end links to each other with the current/voltage testing circuit, and the electrifying electrodes control circuit is connected with level electrode, and level electrode is connected with the current/voltage testing circuit.Power circuit is connected with display control circuit, single-chip microcomputer, electrifying electrodes control circuit, depolarization circuit, current/voltage testing circuit.
Embodiment 2 is referring to Fig. 2.The switching device of depolarization circuit of the present utility model adopts photo-coupler M2, photo-coupler M2 is made up of light emitting diode, triode, form depolarization circuit with resistance R 1, R10, R11, wherein input pin 1 pin of photo-coupler M2 is that 30 pin are connected with the output pin PD0 of single-chip microcomputer, output pin 7 pin of photo-coupler M2 are connected with resistance R 10, R11, are communicated with 8 pin, and 8 pin are connected with power circuit VDD, 2 pin are connected with resistance R 1, and the other end of resistance R 1 is connected with the power-on switch circuit.The other end of resistance R 10 is connected with potential electrode SW1, and the other end of R11 is connected with potential electrode SW2.The end of potential electrode SW1 is connected with the resistance R 9 of voltage, current detection circuit, and the end of potential electrode SW2 is connected with the resistance R 8 of voltage, current detection circuit.Single-chip microcomputer 30 pin output high level, then photo-coupler M2 and current-limiting resistance R10, R11 are added on potential electrode SW1 and the SW2, by medium between electrode, to the other end SW0 of electrode, arrive power supply negative terminal VSS by resistance R 5 again, thereby the reverse charging of finishing electrode is a process of depolarization.
The switching device of voltage, current detection circuit adopts photo-coupler M1, photo-coupler M1 and resistance R 9, R8, R14, R15 form voltage, current detection circuit, wherein the input end of photo-coupler M1 is connected with the end of potential electrode SW1 by resistance R 9, is connected with the end of potential electrode SW2 by resistance R 8.Output terminal 8 pin of photo-coupler M1 are that 24 pin are connected with the PC1 of single-chip microcomputer, are connected with resistance R 14, and 6 pin are that 25 pin are connected with the PC2 of single-chip microcomputer, are connected with resistance R 15.Resistance R 14, R15 link to each other and are connected with power circuit VCC.2,4 pin are connected with the power-on switch circuit, 5,7 pin ground connection.When needs detect, after the common port SW0 of electrode adds suitable voltage, signal will be reacted to other end SW1, the SW2 end of electrode by interelectrode medium, if interelectrode dielectric resistance is less than predetermined value, represent this electrode by the conducting medium submergence, otherwise expression fluid to be measured liquid level is lower than the position of this electrode points.And interelectrode this resistance variations, the light emitting diode of the input end of photo-coupler M1 is changed by electric current, thereby the output triode that makes M1 presents the difference of conducting resistance, single-chip microcomputer pin PC1, PC2 that this signal triggering is attached thereto finish testing process to change in electric between electrode by the control of single-chip microcomputer internal processes.
The power-on switch circuit is made up of photo-coupler M3, resistance R 2, R5,3 pin of photo-coupler are that 31 pin are connected with the PD1 of single-chip microcomputer, and be controlled by 31 pin, and 4 pin are connected ground connection by resistance R 2 with the resistance R 1 of depolarization circuit, and 5 pin link to each other with the common port SW0 of potential electrode.Be connected with the end of stake resistance R5 simultaneously.The other end of R5 is connected with negative supply VSS.6 pin are connected with 8 pin of photo-coupler M2 and meet supply voltage circuit VDD.The effect of resistance R 5 is negative sense paths that the electrode of flowing through is provided during for electrode depolarization.Its course of work is, when needs are measured, open power-on switch by the control of single-chip microcomputer internal processes, 5,6 pin that the PD1 output high level of single-chip microcomputer is equivalent to M2 are communicated with, the electrode working power is added on the electrode, measures when finishing, and this end power supply of potential electrode is disconnected, this moment, grounding circuit made this end of potential electrode be connected to ground level, had so just finished the electrifying electrodes process.
As Fig. 2,7,8,9,10,11,12,13,14,15,16,17 pin of single-chip microcomputer of the present utility model serial connection is connected with display circuit, serial connection capacitor C 8,3,4,5 pin serial connection between 20,21 pin, and wherein 4 pin connect capacitor C 6, C7.Display circuit and power circuit can be selected custom circuit arbitrarily for use.What switching device of the present utility model was all selected for use is photo-coupler, switching devices such as the also available triode of photo-coupler M1, M2, M3, relay replace, their input end is controlled by the single-chip microcomputer output pin, and the output terminal of its switch links to each other with the two ends of level electrode.
The course of work of the present utility model and principle: single-chip microcomputer delivery outlet PD1 exports high level, opens and leads to liquid level public electrode SW0.By other end SW1, the SW2...SWn of measuring media, then arrive the negative terminal of energising power supply again to the input light emitting diode of photo-coupler M1 through current-limiting resistance R8, the R9...Rn of signal deteching circuit to electrode.If measured medium reaches between the potential electrode, then this resistance between electrode is just little, otherwise resistance is just big, and the size of resistance directly is reflected to the input end of testing circuit photo-coupler M1 linearly, this signal directly is sent to the input port of single-chip microcomputer through the optocoupler transformation.Realize energising and input by the single-chip microcomputer internal processes, and, show, control or report to the police according to the size that detects resistance (current potential).After this short time detection finishes; the short electric switch of opening; connect depolarization circuit and give the electrode reverse charging in short-term; make the electrode of the measured middle microelectrolysis of possibility be reversed the plating telegram in reply utmost point; and rear electrode and power supply disconnect; electrode is carried out Sleep protection, so both finished accurate measuring process and also finished protection electrode.
Claims (5)
1, a kind of remote level indicator of not corroding electrode, constitute by display control circuit, power circuit, single chip circuit, it is characterized in that, the output terminal of single chip circuit links to each other with the depolarization circuit that is made of switching device, electrifying electrodes circuit, be connected with demonstration and control circuit, its input end links to each other with the voltage that is made of switching device, current detection circuit, and the electrifying electrodes control circuit is connected with level electrode, and level electrode is connected with the current/voltage testing circuit.
2, the remote level indicator of not corroding electrode according to claim 1, it is characterized in that, the switching device of depolarization circuit adopts photo-coupler M2, photo-coupler M2 and resistance are formed depolarization circuit, wherein input pin 1 pin of photo-coupler M2 is connected with output pin 30 pin of single-chip microcomputer, and output pin 7 pin of photo-coupler M2 are connected with bus SW1, the SW2 of voltage, current detection circuit.
3, the remote level indicator of not corroding electrode according to claim 1, it is characterized in that, the switching device of power-on switch circuit adopts photo-coupler M3, photo-coupler M3 and resistance are formed the power-on switch circuit, input pin 3 pin of photo-coupler M3 are connected with output pin 31 pin of single-chip microcomputer, and 4 pin are connected 5 pin by resistance R 2 and are connected with voltage, current detection circuit by resistance R 5 with the resistance R 1 of depolarization circuit.
4, the remote level indicator of not corroding electrode according to claim 1, it is characterized in that, the switching device of voltage, current detection circuit adopts photo-coupler M1, photo-coupler M1 and resistance are formed voltage, current detection circuit, wherein 8 pin of photo-coupler M1 are connected with 24 pin of single-chip microcomputer, and 6 pin are connected with 25 pin of single-chip microcomputer.
5, the remote level indicator of not corroding electrode according to claim 1 is characterized in that, described switching device or employing triode, relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03277268 CN2638041Y (en) | 2003-07-22 | 2003-07-22 | Electric contact liquid level meter without corroding electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03277268 CN2638041Y (en) | 2003-07-22 | 2003-07-22 | Electric contact liquid level meter without corroding electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2638041Y true CN2638041Y (en) | 2004-09-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03277268 Expired - Fee Related CN2638041Y (en) | 2003-07-22 | 2003-07-22 | Electric contact liquid level meter without corroding electrode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2638041Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101224109B (en) * | 2008-02-01 | 2010-12-01 | 深圳市儿童医院 | Electrode depolarization device |
| CN104061975A (en) * | 2014-07-08 | 2014-09-24 | 广东碧丽饮水设备有限公司 | Electric corrosion prevention liquid level electrode detection controller |
| CN105241521A (en) * | 2015-11-18 | 2016-01-13 | 珠海市声驰电器有限公司 | Water level detection circuit |
| CN111912492A (en) * | 2020-09-10 | 2020-11-10 | 广州极飞科技有限公司 | Liquid level measuring device and system |
| WO2023142962A1 (en) * | 2022-01-28 | 2023-08-03 | 追觅创新科技(苏州)有限公司 | Liquid storage tank state detection method and apparatus, and storage medium and electronic apparatus |
-
2003
- 2003-07-22 CN CN 03277268 patent/CN2638041Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101224109B (en) * | 2008-02-01 | 2010-12-01 | 深圳市儿童医院 | Electrode depolarization device |
| CN104061975A (en) * | 2014-07-08 | 2014-09-24 | 广东碧丽饮水设备有限公司 | Electric corrosion prevention liquid level electrode detection controller |
| CN104061975B (en) * | 2014-07-08 | 2017-05-03 | 广东碧丽饮水设备有限公司 | Electric corrosion prevention liquid level electrode detection controller |
| CN105241521A (en) * | 2015-11-18 | 2016-01-13 | 珠海市声驰电器有限公司 | Water level detection circuit |
| CN111912492A (en) * | 2020-09-10 | 2020-11-10 | 广州极飞科技有限公司 | Liquid level measuring device and system |
| WO2023142962A1 (en) * | 2022-01-28 | 2023-08-03 | 追觅创新科技(苏州)有限公司 | Liquid storage tank state detection method and apparatus, and storage medium and electronic apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |