CN208999343U - A kind of water quality detection circuit and water quality testing meter - Google Patents
A kind of water quality detection circuit and water quality testing meter Download PDFInfo
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- CN208999343U CN208999343U CN201821623553.2U CN201821623553U CN208999343U CN 208999343 U CN208999343 U CN 208999343U CN 201821623553 U CN201821623553 U CN 201821623553U CN 208999343 U CN208999343 U CN 208999343U
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Abstract
The utility model proposes a kind of water quality detection circuit and water quality testing meters, including a pair of wiring detection probe, first connecting terminal of the detection probe connects the grid of the first metal-oxide-semiconductor by an adjustable resistance, the sliding end of adjustable resistance passes through the first end of first resistor connection switch, the other end of switch connects the anode of a DC power supply, second connecting terminal of detection probe connects the cathode of DC power supply by second resistance, the drain electrode of first metal-oxide-semiconductor is closed by the first of the 4th resistance connection switch, the grid of first metal-oxide-semiconductor connects the cathode of DC power supply by 3rd resistor, the drain electrode of first metal-oxide-semiconductor connects the base stage of the first triode by the 5th resistance, second connecting terminal of the emitter connecting detection probe of the first triode, the collector of first triode passes through the first indicating circuit connection switch First end, the collector of the first triode connect the base stage of the second triode.The utility model is able to achieve the quick detection of water quality, and greatly reduces equipment cost, and average family is facilitated to use.
Description
Technical field
The utility model belongs to water quality inspection technique field, in particular to a kind of water quality detection circuit and water quality testing meter.
Background technique
Currently, with the development of economy, water pollution phenomenon emerges one after another, life of urban resident supplies water, and is generally adopted by
Water supply pipe supplies water, and on the one hand since the purification of water is not up to standard, causes unqualified on water for city's residential use source；It is another
Aspect leads to the secondary pollution for occurring very more in water supply due to the aging with water supply pipe, to keep water quality poor, endangers
The health of evil resident.Therefore very it is necessary to but common water quality testing meters, even pocket at present for water quality testing meter
Fast detector, the market price is also up to thousands of or even members up to ten thousand, is not suitable for average family use at all.
Therefore, it in view of above scheme in actual fabrication and in place of implementing using upper missing, and corrected, improved, together
When in line with the spirit and theory asked, and by the knowledge of profession, the auxiliary of experience, and after multi-party clever thought, test, just found
The utility model out, spy provide a kind of water quality detection circuit and water quality testing meter again, are able to achieve the quick detection of water quality, and significantly
Equipment cost is reduced, average family is facilitated to use.
Summary of the invention
The utility model proposes a kind of water quality detection circuit and water quality testing meters, solve the problems of the prior art.
The technical solution of the utility model is achieved in that water quality detection circuit, including a pair of wiring detection probe, institute
First connecting terminal for stating detection probe connects the grid of the first metal-oxide-semiconductor, the sliding end of adjustable resistance by an adjustable resistance
By the first end of first resistor connection switch, the other end of switch connects the anode of a DC power supply, and the second of detection probe
A connecting terminal connects the cathode of DC power supply by second resistance, and the drain electrode of the first metal-oxide-semiconductor passes through the 4th resistance connection switch
First close, the grid of the first metal-oxide-semiconductor connects the cathode of DC power supply by 3rd resistor, and the drain electrode of the first metal-oxide-semiconductor passes through the
The base stage of five resistance the first triode of connection, second connecting terminal of the emitter connecting detection probe of the first triode, the
The collector of one triode passes through the first end of the first indicating circuit connection switch, the collector connection the two or three of the first triode
The base stage of pole pipe, the collector of the second pole pipe pass through the first end of the second indicating circuit connection switch, the transmitting of the second triode
Pole passes through second connecting terminal of the 6th resistance that is sequentially connected in series and second resistance connecting detection probe, the first end of switch and
First capacitor is connected between the cathode of DC power supply.
As a preferred embodiment, first metal-oxide-semiconductor is P-channel metal-oxide-semiconductor.
As a preferred embodiment, first triode is NPN triode.
As a preferred embodiment, second triode is NPN triode.
As a preferred embodiment, first indicating circuit is green diode.
As a preferred embodiment, the first end of the positive connection switch of the green diode, two pole of green light
The cathode of pipe connects the collector of the first triode.
As a preferred embodiment, second indicating circuit is red diodes.
As a preferred embodiment, the first end of the positive connection switch of the red diodes, two pole of feux rouges
The cathode of pipe connects the collector of the second triode.
As a preferred embodiment, the DC power supply is 9V DC power supply.
On the other hand, the utility model also provides a kind of water quality testing meter, including as above described in any item water quality detections
Circuit.
After above-mentioned technical proposal, the beneficial effects of the utility model are: working as first terminals of detection probe
Son presses lower switch when not putting into the water, and the first metal-oxide-semiconductor is in high impedance at this time, the first triode ON, at this time green light two
Pole pipe is lit, and will test probe first connecting terminal insertion hand in when, if the concentration of metal ions in water does not surpass
Standard is crossed, still green diode is lighted, and instruction water quality is normal, if after the concentration of heavy metal ion in water is above standard,
Resistance between two connecting terminals of detection probe becomes smaller, and the first metal-oxide-semiconductor is in Low ESR, ends the first triode, green light
Diode extinguishes, and green diode gives the second triode bias at this time, makes second=triode ON, waits red diodes here
Light, indicate water in heavy metal ion it is exceeded, and it is adjustable then for adjustment detection sensitivity, guarantee detection as a result, this
Scenario-frame is simple and reliable, and low in cost, although testing result cannot accurately be shown, intuitively passes through red diodes
Or the luminous instruction of green diode, show whether water quality is up to standard, meets family's requirement.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the circuit diagram of the utility model water quality detection circuit.
In figure, R1- first resistor；R2- second resistance；R3- 3rd resistor；The 4th resistance of R4-；The 5th resistance of R5-；R6-
6th resistance；RW- adjustable resistance；D1- green diode；D2 red diodes；The first metal-oxide-semiconductor of Q1-；The first triode of V1-；
The second triode of V2-；First connecting terminal of H-；Second connecting terminal of L-；C1- first capacitor；S- switch；V- power supply.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, this water quality detection circuit, including a pair of wiring detection probe, first terminals of detection probe
Sub- H passes through the grid of adjustable resistance RW the first metal-oxide-semiconductor of connection Q1, and the sliding end of adjustable resistance RW is connected by first resistor R1
The first end of switch S, the other end of switch S connect the anode of a DC power supply V, and second connecting terminal L of detection probe is logical
Cross the cathode of second resistance R2 connection DC power supply V, the drain electrode of the first metal-oxide-semiconductor Q1 pass through the 4th resistance R4 connection switch S the
One closes, and the grid of the first metal-oxide-semiconductor Q1 passes through the cathode of 3rd resistor R3 connection DC power supply V, and the drain electrode of the first metal-oxide-semiconductor Q1 passes through
The base stage of 5th resistance R5 the first triode of connection V1, second wiring of the emitter connecting detection probe of the first triode V1
The collector of terminal L, the first triode V1 pass through the first end of the first indicating circuit connection switch S, the collection of the first triode V1
Electrode connects the base stage of the second triode V2, and the collector of the second pole pipe passes through the first end of the second indicating circuit connection switch S,
The emitter of second triode V2 passes through second of the 6th resistance R6 being sequentially connected in series and second resistance R2 connecting detection probe
First capacitor C1 is connected between the first end of connecting terminal L, switch S and the cathode of DC power supply V.First metal-oxide-semiconductor Q1 is P ditch
Road metal-oxide-semiconductor.First triode V1 is NPN triode.Second triode V2 is NPN triode.First indicating circuit is green light two
Pole pipe D1.The cathode of the first end of the positive connection switch S of green diode D1, green diode D1 connects the first triode V1
Collector.Second indicating circuit is red diodes D2.The first end of the positive connection switch S of red diodes D2, feux rouges
The cathode of diode D2 connects the collector of the second triode V2.DC power supply V is 9V DC power supply V.
The working principle of the water quality detection circuit is: when first connecting terminal H of detection probe is not put into the water
When, by lower switch S, the first metal-oxide-semiconductor Q1 is in high impedance at this time, and the first triode V1 conducting, at this time green diode D1 is by point
It is bright, and will test probe first connecting terminal H insertion hand in when, if the concentration of metal ions in water is not above standard,
Still green diode D1 is lighted, and instruction water quality is normal, if after the concentration of heavy metal ion in water is above standard, detecting spy
Resistance between two connecting terminals of head becomes smaller, and the first metal-oxide-semiconductor Q1 is in Low ESR, ends the first triode V1, green light two
Pole pipe D1 extinguishes, and green diode D1 gives the second triode V2 bias at this time, makes second=triode ON, waits feux rouges two here
Pole pipe D2 is lighted, and indicates that the heavy metal ion in water is exceeded, and the adjustable then sensitivity for adjustment detection, guarantees the knot of detection
Fruit.
On the other hand, this water quality testing meter, the circuit including above scheme, circuit structure is simple, is suitable for home use, and protects
Household water safety is demonstrate,proved, working principle is as above, and details are not described herein again.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (10)
1. a kind of water quality detection circuit, which is characterized in that including a pair of wiring detection probe, first of the detection probe is connect
Line terminals connect the grid of the first metal-oxide-semiconductor by an adjustable resistance, and the sliding end of adjustable resistance passes through first resistor connection switch
First end, the other end of switch connects the anode of a DC power supply, and second connecting terminal of detection probe passes through the second electricity
The drain electrode of the cathode of resistance connection DC power supply, the first metal-oxide-semiconductor is closed by the first of the 4th resistance connection switch, the first metal-oxide-semiconductor
Grid connects the cathode of DC power supply by 3rd resistor, and the drain electrode of the first metal-oxide-semiconductor connects the first triode by the 5th resistance
Base stage, second connecting terminal of the emitter connecting detection probe of the first triode, the collector of the first triode passes through
The first end of first indicating circuit connection switch, the collector of the first triode connect the base stage of the second triode, the second pole pipe
Collector by the first end of the second indicating circuit connection switch, the emitter of the second triode passes through the be sequentially connected in series the 6th
Second connecting terminal of resistance and second resistance connecting detection probe, connects between the first end of switch and the cathode of DC power supply
It is connected to first capacitor.
2. water quality detection circuit according to claim 1, which is characterized in that first metal-oxide-semiconductor is P-channel metal-oxide-semiconductor.
3. water quality detection circuit according to claim 2, which is characterized in that first triode is NPN triode.
4. water quality detection circuit according to claim 3, which is characterized in that second triode is NPN triode.
5. water quality detection circuit according to claim 4, which is characterized in that first indicating circuit is two pole of green light
Pipe.
6. water quality detection circuit according to claim 5, which is characterized in that the positive connection switch of the green diode
First end, the cathode of green diode connects the collector of the first triode.
7. water quality detection circuit according to claim 6, which is characterized in that second indicating circuit is two pole of feux rouges
Pipe.
8. water quality detection circuit according to claim 7, which is characterized in that the positive connection switch of the red diodes
First end, the cathode of red diodes connects the collector of the second triode.
9. water quality detection circuit according to claim 8, which is characterized in that the DC power supply is 9V DC power supply.
10. a kind of water quality testing meter, which is characterized in that including water quality detection circuit as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821623553.2U CN208999343U (en) | 2018-09-30 | 2018-09-30 | A kind of water quality detection circuit and water quality testing meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821623553.2U CN208999343U (en) | 2018-09-30 | 2018-09-30 | A kind of water quality detection circuit and water quality testing meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208999343U true CN208999343U (en) | 2019-06-18 |
Family
ID=66803239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821623553.2U Active CN208999343U (en) | 2018-09-30 | 2018-09-30 | A kind of water quality detection circuit and water quality testing meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208999343U (en) |
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2018
- 2018-09-30 CN CN201821623553.2U patent/CN208999343U/en active Active
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