CN103675037A - Water quality detecting device with simple structure - Google Patents
Water quality detecting device with simple structure Download PDFInfo
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- CN103675037A CN103675037A CN201310613027.3A CN201310613027A CN103675037A CN 103675037 A CN103675037 A CN 103675037A CN 201310613027 A CN201310613027 A CN 201310613027A CN 103675037 A CN103675037 A CN 103675037A
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Abstract
The invention discloses a water quality detecting device with a simple structure. The water quality detecting device comprises a casing and a detection circuit located in the casing, wherein the detection circuit comprises a field-effect transistor; a grid electrode of the field-effect transistor is connected onto a first probe through a variable resistor R3; a source electrode of the field-effect transistor is connected onto a second probe; an adjusting end of the variable resistor R3 is connected onto a power source through a resistor R1; a drain electrode of the field-effect transistor is connected with the power source through a resistor R2 and connected onto a base electrode of a triode T1 through a resistor R4; a collector electrode of the triode T1 is connected with a cathode of a diode D1; an emitting electrode of the triode T1 is connected onto the second probe through a resistor R5; the collector electrode of the triode T1 is connected with a base electrode of a triode T2; an emitting electrode of the triode T2 is connected with the ground through a resistor R6; a collector electrode of the triode T2 is connected onto a cathode of a diode D2; and anodes of the diode D2 and the diode D1 are connected with the power source. The water quality detecting device with the simple structure has the advantages of simple structure and low cost.
Description
Technical field
The present invention relates to a kind of water quality detecting device, relate in particular a kind of water quality detecting device simple in structure.
Background technology
In today of economic development, environmental pollution is also more and more serious.Water in factory is not treated or process the discharge of just yearning for up to standard, makes our water resource more and more be subject to serious threat.Water is the necessary material that people depend on for existence, and water resource is subject to polluting and will brings serious threat to people healthy.At modern cancer, send out more and more, people more and more focus on water quality.When water quality is detected, be that hydromining sample is sent to special water quality detection department, water quality monitoring department adopts special testing tool to detect water again.Its operation is complicated, and equipment is complicated, is not suitable for general family and uses.
Summary of the invention
The invention provides a kind of water quality detecting device simple in structure, it is simple in structure, with low cost, suits large area to popularize.
For solving above-mentioned technical matters, the present invention by the following technical solutions:
Water quality detecting device simple in structure, it comprises shell, the first probe, the second probe and be positioned at the testing circuit of shell, described testing circuit comprises field effect transistor, the grid of described field effect transistor is connected on the first probe by variable resistor R3, the source electrode of described field effect transistor is connected on the second probe, the adjustable side of described variable resistor R3 is connected on power supply by resistance R 1, the drain electrode of described field effect transistor is connected with power supply by resistance R 2, the drain electrode of described field effect transistor is connected in the base stage of triode T1 by resistance R 4, the collector of described triode T1 is connected on the negative electrode of diode D1, the emitter of described triode T1 is connected on the second probe by resistance R 5, the collector of described triode T1 is connected in the base stage of triode T2, the emitter of described triode T2 is connected to the ground by resistance R 6, the collector of described triode T2 is connected on the negative electrode of diode D2, described diode D2 and the anode of diode D1 are all connected on power supply, described diode D2 and diode D1 are light emitting diode.
Further technical scheme is:
As preferably, described diode D2 is different with the glow color of diode D1.
As preferably, the maximum adjustable extent of described variable resistor R3 is 200 kilohms.
As preferably, the resistance of described resistance R 1 is greater than the resistance of resistance R 2.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention utilizes the peripheral circuits such as field effect transistor and triode to detect water quality, and it is simple in structure, utilizes the light on and off of light emitting diode to react the situation of water quality, and it is simple to operate, is convenient to people and uses; Its circuit structure is simple, with low cost, and use suits large area to popularize.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the circuit diagram of testing circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.Embodiments of the present invention include but not limited to the following example.
[embodiment]
Water quality detecting device simple in structure as shown in Figure 1, it comprises shell, the first probe, the second probe and be positioned at the testing circuit of shell, described testing circuit comprises field effect transistor, the grid of described field effect transistor is connected on the first probe by variable resistor R3, the source electrode of described field effect transistor is connected on the second probe, the adjustable side of described variable resistor R3 is connected on power supply by resistance R 1, the drain electrode of described field effect transistor is connected with power supply by resistance R 2, the drain electrode of described field effect transistor is connected in the base stage of triode T1 by resistance R 4, the collector of described triode T1 is connected on the negative electrode of diode D1, the emitter of described triode T1 is connected on the second probe by resistance R 5, the collector of described triode T1 is connected in the base stage of triode T2, the emitter of described triode T2 is connected to the ground by resistance R 6, the collector of described triode T2 is connected on the negative electrode of diode D2, described diode D2 and the anode of diode D1 are all connected on power supply, described diode D2 and diode D1 are light emitting diode.In the present invention, when the first probe, the second probe do not insert water to be detected, field effect transistor is high-impedance state, triode T1 conducting, and diode D1 is lit.The first probe, the second probe are inserted in water simultaneously, if the objectionable impurities in water does not exceed standard, diode D1 is still lit; If the objectionable impurities in water exceeds standard, the resistance decreasing between the first probe, the second probe, field effect transistor is low resistive state, triode T1 cut-off, diode D1 goes out, and now diode D1 is to triode T2 bias voltage, triode T2 conducting, diode D2 is bright.Utilize the bright of diode D1 to represent that the objectionable impurities in water does not exceed standard, the bright of diode D2 represents that in water, objectionable impurities exceeds standard, and with this, realizes the detection to water quality, is convenient to people's operation.
For the ease of people, water quality condition is judged, described diode D2 is different with the glow color of diode D1.In actual use, suggestion is made as by diode D2 the LED lamp glowing, and reaches successively watchful object.
In order to increase the sensitivity of this circuit, the maximum adjustable extent of described variable resistor R3 is 200 kilohms.Variable resistor R3 for adjustment sensitivity, is made as 200 kilohms by the maximum adjustable extent of variable resistor R3, and its adjustable extent is increased, sensitivity that can intensifier circuit.
The resistance of described resistance R 1 is greater than the resistance of resistance R 2.Resistance R 2 provides suitable pressure drop to protect field effect transistor, and resistance R 1 is connected in the base stage of field effect transistor, and field effect transistor will normally be worked, and its base voltage should be less than grid voltage, and the resistance of resistance R 1 is greater than the resistance of resistance R 2.
Be as mentioned above embodiments of the invention.The present invention is not limited to above-mentioned embodiment, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, within all falling into protection scope of the present invention.
Claims (4)
1. water quality detecting device simple in structure, it is characterized in that: it comprises shell, the first probe, the second probe and be positioned at the testing circuit of shell, described testing circuit comprises field effect transistor, the grid of described field effect transistor is connected on the first probe by variable resistor R3, the source electrode of described field effect transistor is connected on the second probe, the adjustable side of described variable resistor R3 is connected on power supply by resistance R 1, the drain electrode of described field effect transistor is connected with power supply by resistance R 2, the drain electrode of described field effect transistor is connected in the base stage of triode T1 by resistance R 4, the collector of described triode T1 is connected on the negative electrode of diode D1, the emitter of described triode T1 is connected on the second probe by resistance R 5, the collector of described triode T1 is connected in the base stage of triode T2, the emitter of described triode T2 is connected to the ground by resistance R 6, the collector of described triode T2 is connected on the negative electrode of diode D2, described diode D2 and the anode of diode D1 are all connected on power supply, described diode D2 and diode D1 are light emitting diode.
2. water quality detecting device simple in structure according to claim 1, is characterized in that: described diode D2 is different with the glow color of diode D1.
3. water quality detecting device simple in structure according to claim 1, is characterized in that: the maximum adjustable extent of described variable resistor R3 is 200 kilohms.
4. water quality detecting device simple in structure according to claim 1, is characterized in that: the resistance of described resistance R 1 is greater than the resistance of resistance R 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310613027.3A CN103675037A (en) | 2013-11-28 | 2013-11-28 | Water quality detecting device with simple structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310613027.3A CN103675037A (en) | 2013-11-28 | 2013-11-28 | Water quality detecting device with simple structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103675037A true CN103675037A (en) | 2014-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310613027.3A Pending CN103675037A (en) | 2013-11-28 | 2013-11-28 | Water quality detecting device with simple structure |
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| CN (1) | CN103675037A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105926715A (en) * | 2016-06-15 | 2016-09-07 | 张萍 | Air water production machine with real-time monitoring function and efficient water purification function |
| CN105926716A (en) * | 2016-06-15 | 2016-09-07 | 张萍 | Air water production machine with accurate detection function and efficient water purification function |
| CN105926720A (en) * | 2016-06-15 | 2016-09-07 | 张萍 | Air water generator high in water purification efficiency |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008164359A (en) * | 2006-12-27 | 2008-07-17 | Horiba Ltd | Ion sensor and analyzer using the same |
| CN201138338Y (en) * | 2007-11-15 | 2008-10-22 | 高子泉 | Water quality detector |
| CN201945574U (en) * | 2010-12-01 | 2011-08-24 | 何天生 | Device for monitoring water quality of sewage draining port |
| CN202599893U (en) * | 2012-06-21 | 2012-12-12 | 黄冬来 | Wastewater detector |
-
2013
- 2013-11-28 CN CN201310613027.3A patent/CN103675037A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008164359A (en) * | 2006-12-27 | 2008-07-17 | Horiba Ltd | Ion sensor and analyzer using the same |
| CN201138338Y (en) * | 2007-11-15 | 2008-10-22 | 高子泉 | Water quality detector |
| CN201945574U (en) * | 2010-12-01 | 2011-08-24 | 何天生 | Device for monitoring water quality of sewage draining port |
| CN202599893U (en) * | 2012-06-21 | 2012-12-12 | 黄冬来 | Wastewater detector |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105926715A (en) * | 2016-06-15 | 2016-09-07 | 张萍 | Air water production machine with real-time monitoring function and efficient water purification function |
| CN105926716A (en) * | 2016-06-15 | 2016-09-07 | 张萍 | Air water production machine with accurate detection function and efficient water purification function |
| CN105926720A (en) * | 2016-06-15 | 2016-09-07 | 张萍 | Air water generator high in water purification efficiency |
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Application publication date: 20140326 |