CN104614408A - Simple water quality detection circuit - Google Patents
Simple water quality detection circuit Download PDFInfo
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- CN104614408A CN104614408A CN201310538221.XA CN201310538221A CN104614408A CN 104614408 A CN104614408 A CN 104614408A CN 201310538221 A CN201310538221 A CN 201310538221A CN 104614408 A CN104614408 A CN 104614408A
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- operational amplifier
- slide rheostat
- resistance
- diode
- water quality
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Abstract
The invention discloses a simple water quality detection circuit, including a light-emitting diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a first sliding rheostat, a second sliding rheostat, a third sliding rheostat, a four sliding rheostat, a probe, a first operational amplifier, a second operational amplifier, a third operational amplifier, a fourth operational amplifier, a first diode, a second diode, a composite light emitting diode, a three terminal voltage regulator, a switch and a power supply. Two metal sheets as the probe are put into the water, the electrical resistance between the metal sheets changes along with the amount of ions in the water so as to cause corresponding color changes of the composite light emitting diode, the color of the composite light emitting diode is different along with different degrees of pollution, and the simple water quality detection circuit has the characteristics of simple process, low cost and convenient and quick operation.
Description
Technical field
The present invention relates to a kind of servicing unit of hydraulic engineering, particularly relate to a kind of Simple water quality detection circuit.
Background technology
Along with developing rapidly of industry, kind and the quantity of waste water rapidly increase, also increasingly extensive and serious to the pollution of water, the health and safety of the serious threat mankind, waste water has directly been entered farmland by a lot of factory, lake and rivers, have a strong impact on the life health of surrounding resident, and the behavior of this direct waste discharge is illegal, and friend peasant living in surrounding is difficult to oneself go to make detection to the waste water of plant emissions, to such an extent as to they have hardship not say, its price comparison of the Water quality detector of specialty is expensive and need the market of professional domain to buy, be unfavorable for promoting to masses, whether the water quality that comparing general public more needs a kind of easy Water quality detector to detect surrounding is polluted.
Summary of the invention
Object of the present invention is just to provide a kind of Simple water quality detection circuit to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The present invention includes light emitting diode, first resistance, second resistance, 3rd resistance, 4th resistance, first slide rheostat, second slide rheostat, 3rd slide rheostat, 4th slide rheostat, probe, first operational amplifier, second operational amplifier, 3rd operational amplifier, four-operational amplifier, first diode, second diode, composite LED, three terminal regulator, switch and power supply, the positive pole of described light emitting diode simultaneously with the first end of described first slide rheostat, the first end of described second slide rheostat, the first end of described 4th slide rheostat, the first end of described 3rd slide rheostat is connected with the first end of described three terminal regulator, and the negative pole of described light emitting diode is connected with the first end of described first resistance, the second end of described first resistance simultaneously with the second end of described first slide rheostat, second end of described second resistance, second end of described probe, second end of described 3rd resistance, second end of described 4th slide rheostat, second end of described 3rd slide rheostat, second end of described 4th resistance, second end of described three terminal regulator is connected with the negative pole of described power supply, the sliding end of described first slide rheostat is connected with the first input end of described first operational amplifier, the second input end of described first operational amplifier simultaneously with the first end of described second resistance, the negative pole of described first diode, the negative pole of described second diode, the first end of described 3rd resistance, second input end of described 3rd operational amplifier is connected with the first input end of described four-operational amplifier, the output terminal of described first operational amplifier is connected with the positive pole of described first diode, the first input end of described second operational amplifier is connected with the output terminal of described second operational amplifier and the positive pole of described second diode simultaneously, with the first end of described probe while of the second input end of described second operational amplifier, second end of described second slide rheostat is connected with the sliding end of described second slide rheostat, the first input end of described 3rd operational amplifier is connected with the sliding end of described 3rd slide rheostat, the output terminal of described 3rd operational amplifier is connected with the first end of described composite LED, second end of described composite LED is connected with the output terminal of described four-operational amplifier, second input end of described four-operational amplifier is connected with the sliding end of described 4th slide rheostat, 3rd end of described composite LED is connected with the first end of described 4th resistance, the positive pole of described power supply is connected with the second end of described switch, the second end of described switch and the three-terminal link of described three terminal regulator.
Particularly, the first operational amplifier to four-operational amplifier is the integrated operational amplifier that model is LM324; Described composite LED is made up of two light emitting diodes.
Beneficial effect of the present invention is:
Employing of the present invention two sheet metals are as probe, put it in water, resistance between sheet metal by with water intermediate ion number and change, thus cause the glow color of composite LED also to change thereupon, wherein water nonpollution composite LED green light, light is sent out in water quality slight pollution orange, water quality serious pollution glows, so distinguished the pollution level of water quality by the present invention, have simply direct and easy to operate feature, circuit structure of the present invention is simple simultaneously, adopts components and parts few, technique cost of manufacture is low, is conducive to promoting and producing.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1: the present invention includes LED, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, first slide rheostat RP1, second slide rheostat RP2, 3rd slide rheostat RP3, 4th slide rheostat RP4, probe T, first operational amplifier A 1, second operational amplifier A 2, 3rd operational amplifier A 3, four-operational amplifier A4, first diode D1, second diode D2, composite LED DD, three terminal regulator Q, K switch and power supply E, the positive pole of LED simultaneously with the first end of the first slide rheostat RP1, the first end of the second slide rheostat RP2, the first end of the 4th slide rheostat RP4, the first end of the 3rd slide rheostat RP3 is connected with the first end of three terminal regulator Q, and the negative pole of LED is connected with the first end of the first resistance R1, second end of the first resistance R1 simultaneously with second end of the first slide rheostat RP1, second end of the second resistance R2, second end of probe T, second end of the 3rd resistance R3, second end of the 4th slide rheostat RP4, second end of the 3rd slide rheostat RP3, second end of the 4th resistance R4, second end of three terminal regulator Q is connected with the negative pole of power supply E, and the sliding end of the first slide rheostat RP1 is connected with the first input end of the first operational amplifier A 1, the second input end of the first operational amplifier A 1 simultaneously with the first end of the second resistance R2, the negative pole of the first diode D1, the negative pole of the second diode D2, the first end of the 3rd resistance R3, second input end of the 3rd operational amplifier A 3 is connected with the first input end of four-operational amplifier A4, the output terminal of the first operational amplifier A 1 is connected with the positive pole of the first diode D1, the first input end of the second operational amplifier A 2 is connected with the output terminal of the second operational amplifier A 2 and the positive pole of the second diode D2 simultaneously, the second input end of the second operational amplifier A 2 simultaneously with the first end of the T that pops one's head in, second end of the second slide rheostat RP2 is connected with the sliding end of the second slide rheostat RP2, the first input end of the 3rd operational amplifier A 3 is connected with the sliding end of the 3rd slide rheostat RP3, the output terminal of the 3rd operational amplifier A 3 is connected with the first end of composite LED DD, second end of composite LED DD is connected with the output terminal of four-operational amplifier A4, second input end of four-operational amplifier A4 is connected with the sliding end of the 4th slide rheostat RP4,3rd end of composite LED DD is connected with the first end of the 4th resistance R4, the positive pole of power supply E is connected with the second end of K switch, the second end of K switch and the three-terminal link of three terminal regulator Q, first operational amplifier A 1 is to four-operational amplifier A4 the integrated operational amplifier that model is LM324, and composite LED DD is made up of two light emitting diodes.Probe T of the present invention is put into water, probe T two sheet metals resistance by with water intermediate ion number and change, thus the output of the second operational amplifier A 2 also changes, the output of the second operational amplifier A 2 wherein can be adjusted by the second slide rheostat RP2.The 3rd operational amplifier A 3 in circuit and four-operational amplifier A4 form window comparator, 3rd slide rheostat RP3 and the 4th slide rheostat RP4 then determines the scope of window, the last pollution condition just being detected water quality by the glow color of composite LED DD, the composite LED DD green light when water nonpollution, during water quality slight pollution, composite LED DD sends out light orange, and during water quality serious pollution, composite LED DD glows.
Claims (3)
1. a Simple water quality detection circuit, is characterized in that: comprise light emitting diode, first resistance, second resistance, 3rd resistance, 4th resistance, first slide rheostat, second slide rheostat, 3rd slide rheostat, 4th slide rheostat, probe, first operational amplifier, second operational amplifier, 3rd operational amplifier, four-operational amplifier, first diode, second diode, composite LED, three terminal regulator, switch and power supply, the positive pole of described light emitting diode simultaneously with the first end of described first slide rheostat, the first end of described second slide rheostat, the first end of described 4th slide rheostat, the first end of described 3rd slide rheostat is connected with the first end of described three terminal regulator, and the negative pole of described light emitting diode is connected with the first end of described first resistance, the second end of described first resistance simultaneously with the second end of described first slide rheostat, second end of described second resistance, second end of described probe, second end of described 3rd resistance, second end of described 4th slide rheostat, second end of described 3rd slide rheostat, second end of described 4th resistance, second end of described three terminal regulator is connected with the negative pole of described power supply, the sliding end of described first slide rheostat is connected with the first input end of described first operational amplifier, the second input end of described first operational amplifier simultaneously with the first end of described second resistance, the negative pole of described first diode, the negative pole of described second diode, the first end of described 3rd resistance, second input end of described 3rd operational amplifier is connected with the first input end of described four-operational amplifier, the output terminal of described first operational amplifier is connected with the positive pole of described first diode, the first input end of described second operational amplifier is connected with the output terminal of described second operational amplifier and the positive pole of described second diode simultaneously, with the first end of described probe while of the second input end of described second operational amplifier, second end of described second slide rheostat is connected with the sliding end of described second slide rheostat, the first input end of described 3rd operational amplifier is connected with the sliding end of described 3rd slide rheostat, the output terminal of described 3rd operational amplifier is connected with the first end of described composite LED, second end of described composite LED is connected with the output terminal of described four-operational amplifier, second input end of described four-operational amplifier is connected with the sliding end of described 4th slide rheostat, 3rd end of described composite LED is connected with the first end of described 4th resistance, the positive pole of described power supply is connected with the second end of described switch, the second end of described switch and the three-terminal link of described three terminal regulator.
2. a kind of Simple water quality detection circuit according to claim 1, is characterized in that: described first operational amplifier to described four-operational amplifier is the integrated operational amplifier that model is LM324.
3. a kind of Simple water quality detection circuit according to claim 1, is characterized in that: described composite LED is made up of two light emitting diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310538221.XA CN104614408A (en) | 2013-11-04 | 2013-11-04 | Simple water quality detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310538221.XA CN104614408A (en) | 2013-11-04 | 2013-11-04 | Simple water quality detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104614408A true CN104614408A (en) | 2015-05-13 |
Family
ID=53148953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310538221.XA Pending CN104614408A (en) | 2013-11-04 | 2013-11-04 | Simple water quality detection circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN104614408A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116022A (en) * | 2015-09-22 | 2015-12-02 | 成都乐维斯科技有限公司 | Water quality detection circuit designed on basis of single supply quadri-operational amplifier |
| CN105158430A (en) * | 2015-09-22 | 2015-12-16 | 成都乐维斯科技有限公司 | Water quality testing circuit based on three-terminal voltage-regulator tube voltage regulation design |
| CN106088234A (en) * | 2016-08-03 | 2016-11-09 | 张萍 | A kind of air water machine with water quality monitoring function |
-
2013
- 2013-11-04 CN CN201310538221.XA patent/CN104614408A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116022A (en) * | 2015-09-22 | 2015-12-02 | 成都乐维斯科技有限公司 | Water quality detection circuit designed on basis of single supply quadri-operational amplifier |
| CN105158430A (en) * | 2015-09-22 | 2015-12-16 | 成都乐维斯科技有限公司 | Water quality testing circuit based on three-terminal voltage-regulator tube voltage regulation design |
| CN106088234A (en) * | 2016-08-03 | 2016-11-09 | 张萍 | A kind of air water machine with water quality monitoring function |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150513 |