CN203848902U - Water level detector - Google Patents
Water level detector Download PDFInfo
- Publication number
- CN203848902U CN203848902U CN201420274179.5U CN201420274179U CN203848902U CN 203848902 U CN203848902 U CN 203848902U CN 201420274179 U CN201420274179 U CN 201420274179U CN 203848902 U CN203848902 U CN 203848902U
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- water level
- level detection
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- comparer
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Abstract
The utility model provides a water level detector which comprises a positive electrode, a negative electrode, a direct-current power source and a reference water level detection circuit connected between the positive electrode and the negative electrode. The direct-current power source is connected with the positive electrode, and the water level detector further comprises a reference circuit used for generating reference voltage, and a first relative water level detection circuit. The first relative water level detection circuit is composed of a first relative electrode, a first comparator, an OR gate and a light emitting device. A water level detection point of the first relative electrode is higher than a water level detection point of the negative electrode. According to the water level detector, the electrodes of different heights are arranged to detect water levels of different heights, the result of the former water level detection circuit is introduced for logical operation, and the possible defect of error judgment of an original water level indicator is overcome.
Description
Technical field
The utility model relates to electronic circuit field, particularly, relates to a kind of water level detection gauge.
Background technology
Water level detection gauge is the instrument for detection of water level, there is the water level detection gauge of mechanical type and two kinds of forms of electronic type, wherein the principle of electronic type detector is that two electrodes are placed on to region to be measured, in the time that water level covers the water level detecting point on electrode, due to the electric action of water, between two electrodes, form electricity and connect.
For detecting the water level of differing heights, the electrode that possesses differing heights water level detecting point can be set, water level to each height detects, but in reality, due to constantly dwindling of water-level gauge volume, between electrode, arrange closely, owing to raining or other reasons infiltration, may cause conducting in advance between the electrode in higher position, cause erroneous judgement, truth is now not liquid level rising from bottom to top, but only between two detecting electrodes, seeps water and form electric path.
Utility model content
Easily judge the technological deficiency of water level by accident for the water level detection gauge that overcomes prior art, the utility model discloses a kind of water level detection gauge.
Water level detection gauge described in the utility model, comprise forward electrode, negative sense electrode, direct supply and be connected to forward electrode and negative sense electrode between datum level testing circuit, described direct supply connects forward electrode, also comprises for generation of the reference circuit of reference voltage, first-phase water level detection circuit; Described first-phase is made up of the first comparative electrode, the first comparer or door, luminescent device water level detection circuit, the reverse input end of described the first comparer connects the first comparative electrode, positive input connects the reference voltage output end of reference circuit, the first input end of output terminal connection or door, or the second input end of door connects the detection signal output terminal of datum level testing circuit, or door output terminal and direct supply between be connected luminescent device, described first-phase to electrode level check point higher than negative sense electrode level check point.
Preferably, described luminescent device is light emitting diode, and light emitting diode negative pole connects or gate output terminal, anodal by LED current-limiting resistance connection direct supply.
Concrete, described reference circuit is made up of the first divider resistance and the second divider resistance that are connected between direct supply and ground wire, and the common port of described the first divider resistance and the second divider resistance is reference voltage output end.
Preferably, also comprise at least one building block and inner annexation and first-phase to the identical second-phase of water level detection circuit to water level detection circuit, described second-phase comprises the second comparative electrode to water level detection circuit, and the water level detecting point of described the second comparative electrode is between negative sense electrode and the water level detecting point of the first comparative electrode; Second-phase in water level detection circuit or the family status two input ends connect first-phases to water level detection circuit or last the second water level detection circuit or gate output terminal.
Preferably, between the reverse input end of the first comparer and ground wire, be connected with drop-down reset resistor.
Concrete, described datum level testing circuit is made up of the second comparer, the 3rd comparer, luminescent device, microphone device, the reverse input end of described the second comparer connects negative sense electrode, positive input connects reference voltage output end, the output terminal of the second comparer is as the detection signal output terminal of datum level testing circuit, and between direct supply, is connected with luminescent device; The positive input of described the 3rd comparer connects negative sense electrode, and reverse input end connects reference voltage output end, between the output terminal of the 3rd comparer and direct supply, is connected with microphone device.
Water level detection gauge described in the utility model, by the water level of highly different electrode detection differing heights is set, and the result of introducing previous stage water level detection circuit carries out logical operation, overcome the erroneous judgement defect that original water-level gauge may occur.
Brief description of the drawings
Fig. 1 is a kind of embodiment schematic diagram of the utility model;
Mark and corresponding parts title in accompanying drawing: P1-forward electrode, P2-the first comparative electrode, P3-the second comparative electrode, P4-negative sense electrode, the drop-down reset resistor of RPD-, R21-LED current-limiting resistance, R22-power amplifier current-limiting resistance, R3-the first basis point piezoresistance, R4-the second basis point piezoresistance, DC-direct supply, C-electric capacity, D-light emitting diode Z-power amplifier, COMP1-the first comparer, COMP2-the second comparer, COMP3-the 3rd comparer, H-high water stage, M-mid water levels L-low-water level.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is done to detailed description further, but embodiment of the present utility model is not limited to this.
Water level detection gauge, comprise forward electrode P1, negative sense electrode P4, direct supply DC and be connected to forward electrode and negative sense electrode between datum level testing circuit, described direct supply connects forward electrode, also comprises for generation of the reference circuit of reference voltage, first-phase water level detection circuit; Described first-phase is made up of the first comparative electrode P2, the first comparator C OMP1 or door NOR, luminescent device water level detection circuit, the reverse input end of described the first comparer connects the first comparative electrode, positive input connects the reference voltage output end of reference circuit, the first input end of output terminal connection or door, or the second input end of door connects the detection signal output terminal of datum level testing circuit, or door output terminal and direct supply between be connected luminescent device, described first-phase to electrode level check point higher than negative sense electrode level check point.
Datum level testing circuit is for detection of the height of water level of water level detecting point lowest part, in the time that liquid level arrives low-water level L, between forward electrode and negative sense electrode, form current path, thereby trigger the prompting parts that are connected between positive and negative electrode, such as bulb or loudspeaker etc., datum level testing circuit is as shown in Figure 1 by the second comparator C OMP2, the 3rd comparator C OMP3, luminescent device, microphone device composition, the reverse input end of described the second comparer connects negative sense electrode, positive input connects reference voltage output end, the output terminal of the second comparer is as the detection signal output terminal of datum level testing circuit, and between direct supply, be connected with luminescent device, the positive input of described the 3rd comparer connects negative sense electrode, and reverse input end connects reference voltage output end, between the output terminal of the 3rd comparer and direct supply, is connected with microphone device.In the time that forward electrode is connected conducting with negative sense electrode, the second comparer output low level, the 3rd comparer output high level, lights luminescent device, and not sounding of microphone device, otherwise, if water level does not reach the water level detecting point of forward electrode and negative sense electrode, the second comparer output high level, the 3rd comparer output low level, not conducting of luminescent device, microphone device conducting sounding.Can be at microphone device two ends shunt capacitance C, filtering clutter, avoids microphone device, sends noise.Microphone device and luminescent device can adopt respectively power amplifier Z and light emitting diode etc.
Reference circuit is for generation of a benchmark comparative voltage, this voltage accuracy requires low, and need to change with the D. C. value of direct supply DC, reasonably processing mode is made up of the first divider resistance R3 and the second divider resistance R4 that are connected between direct supply and ground wire, and the common port of described the first divider resistance and the second divider resistance is reference voltage output end.The resistance value ratio of common the first divider resistance and the second divider resistance is 1:1, makes reference voltage be positioned at supply voltage intermediate value, and comparer detects conventionally precipitous at supply voltage intermediate value place curve of output, and effect is better.
Embodiment as shown in Figure 1, in the time that water level rises to mid water levels M, make conducting between the first comparative electrode P2 and forward electrode, the first comparer output low level of first-phase to water level detection circuit, simultaneously due to or the second input end of door be connected with the detection signal output terminal of datum level testing circuit, the i.e. output terminal of the second comparer, the in the situation that of water flooding negative sense electrode and the first comparative electrode, the output of two comparers is low level, or door output be also low level, thereby luminescent device conducting.Luminescent device can be chosen as light emitting diode D, and light emitting diode negative pole connects or gate output terminal, anodal connects direct supply by LED current-limiting resistance R21, the power when limiting light emitting diode conducting.If only conducting between forward electrode and the first comparative electrode, and more not conducting between the negative sense electrode of low clearance and forward electrode, the second comparator C OMP2 is output as high level, or door output is also high level, luminescent device can not conducting, thereby has avoided erroneous judgement.
For the more accurate water level detecting of needs, as long as increase building block and inner annexation and aforesaid first-phase to the identical second-phase of water level detection circuit to water level detection circuit, described second-phase comprises the second comparative electrode to water level detection circuit, and the water level detecting point of described the second comparative electrode is between negative sense electrode and the water level detecting point of the first comparative electrode; Second-phase in water level detection circuit or the family status two input ends connect first-phases to water level detection circuit or last the second water level detection circuit or gate output terminal.According to similar exclusive disjunction logic, can judge, can stop the misjudgment phenomenon to mid water levels.
Can also between the reverse input end of the first comparer of each relative water level detection circuit and ground wire, drop-down reset resistor RPD be set, during due to electrode conduction, may store positive charge at the first comparer reverse input end, cause comparer to be exported by locked, can certainly adopt the comparer of built-in drop-down input stage, for example, input pipe is addressed this problem for the comparer of NPN triode.
As mentioned above, can realize preferably the utility model.
Claims (1)
1. water level detection gauge, comprise forward electrode, negative sense electrode, direct supply and be connected to forward electrode and negative sense electrode between datum level testing circuit, described direct supply connects forward electrode, it is characterized in that, also comprise for generation of the reference circuit of reference voltage, first-phase water level detection circuit;
Described first-phase is made up of the first comparative electrode, the first comparer or door, luminescent device water level detection circuit, the reverse input end of described the first comparer connects the first comparative electrode, positive input connects the reference voltage output end of reference circuit, the first input end of output terminal connection or door, or the second input end of door connects the detection signal output terminal of datum level testing circuit, or door output terminal and direct supply between be connected luminescent device, described first-phase to electrode level check point higher than negative sense electrode level check point.
2. water level detection gauge according to claim 1, is characterized in that, described luminescent device is light emitting diode, and light emitting diode negative pole connects or gate output terminal, anodal by LED current-limiting resistance connection direct supply.
3. water level detection gauge according to claim 1, it is characterized in that, described reference circuit is made up of the first divider resistance and the second divider resistance that are connected between direct supply and ground wire, and the common port of described the first divider resistance and the second divider resistance is reference voltage output end.
4. water level detection gauge according to claim 1, it is characterized in that, also comprise at least one building block and inner annexation and first-phase to the identical second-phase of water level detection circuit to water level detection circuit, described second-phase comprises the second comparative electrode to water level detection circuit, and the water level detecting point of described the second comparative electrode is between negative sense electrode and the water level detecting point of the first comparative electrode; Second-phase in water level detection circuit or the family status two input ends connect first-phases to water level detection circuit or last the second water level detection circuit or gate output terminal.
5. water level detection gauge according to claim 1, is characterized in that, is connected with drop-down reset resistor between the reverse input end of the first comparer and ground wire.
6. water level detection gauge according to claim 1, it is characterized in that, described datum level testing circuit is made up of the second comparer, the 3rd comparer, luminescent device, microphone device, the reverse input end of described the second comparer connects negative sense electrode, positive input connects reference voltage output end, the output terminal of the second comparer is as the detection signal output terminal of datum level testing circuit, and between direct supply, is connected with luminescent device; The positive input of described the 3rd comparer connects negative sense electrode, and reverse input end connects reference voltage output end, between the output terminal of the 3rd comparer and direct supply, is connected with microphone device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420274179.5U CN203848902U (en) | 2014-05-27 | 2014-05-27 | Water level detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420274179.5U CN203848902U (en) | 2014-05-27 | 2014-05-27 | Water level detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203848902U true CN203848902U (en) | 2014-09-24 |
Family
ID=51561906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420274179.5U Expired - Fee Related CN203848902U (en) | 2014-05-27 | 2014-05-27 | Water level detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203848902U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270996A (en) * | 2017-07-13 | 2017-10-20 | 厦门芯阳科技股份有限公司 | A kind of water level detection circuit and device |
| CN111586921A (en) * | 2020-06-28 | 2020-08-25 | 上海策元实业有限公司 | Nuclear power station lamp with automatic switch for lighting of water inlet and water outlet and use method |
-
2014
- 2014-05-27 CN CN201420274179.5U patent/CN203848902U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270996A (en) * | 2017-07-13 | 2017-10-20 | 厦门芯阳科技股份有限公司 | A kind of water level detection circuit and device |
| CN107270996B (en) * | 2017-07-13 | 2021-01-15 | 厦门芯阳科技股份有限公司 | Water level detection circuit and device |
| CN111586921A (en) * | 2020-06-28 | 2020-08-25 | 上海策元实业有限公司 | Nuclear power station lamp with automatic switch for lighting of water inlet and water outlet and use method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20180527 |