CN209231024U - A kind of monitoring water quality on line sampling pretreatment device - Google Patents
A kind of monitoring water quality on line sampling pretreatment device Download PDFInfo
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- CN209231024U CN209231024U CN201920736178.0U CN201920736178U CN209231024U CN 209231024 U CN209231024 U CN 209231024U CN 201920736178 U CN201920736178 U CN 201920736178U CN 209231024 U CN209231024 U CN 209231024U
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Abstract
The utility model discloses a kind of monitoring water quality on line sampling pretreatment devices, including signal amplification unit and transmission processing unit；The output end of signal amplification unit and the input terminal of transmission processing unit connect；Signal amplification unit amplifies input signal by the three amplifier amplifying circuits that triode Q1, triode Q2, operational amplifier U1:A, operational amplifier U1:B and operational amplifier U2:A are formed；Transmission processing unit receives signal by operational amplifier U2:B, and carries out denoising, then handle input signal by integrated chip U3.The utility model relates to a kind of monitoring water quality on line sampling pretreatment devices, it can be used when monitoring water quality on line samples, the advantages of by three amplifier amplifying circuit high cmrrs, high input impedance and low noise, guarantees the measurement accuracy in monitoring water quality on line sampling, relatively reliable.
Description
Technical field
The utility model relates to monitoring water quality on line fields, it particularly relates to a kind of pre- place of monitoring water quality on line sampling
Device is managed, can be used in monitoring water quality on line, can be pressed down in water quality sampling by the high common mode of three amplifier amplifying circuits
The advantages of system ratio, high input impedance and low noise, guarantees the measurement accuracy in monitoring water quality on line sampling, relatively reliable.
Background technique
While economy rapid development, environmental problem is more severe, in order to preferably be managed to quality problem, state
Family has put into effect multinomial policy, and there are also installed a large amount of water quality on-line monitoring devices for various regions government.
Most of water quality on-line monitoring device needs to be equipped with sampling pretreatment device mostly on the market, exists for improving water quality
The application adaptability of line monitoring device.
Although water quality on-line monitoring device can be improved in this monitoring water quality on line sampling pretreatment device application adapts to
Property, but the stability of measured value and accuracy can not ensure, signal is easy to receive influence of noise loss in transmittance process, can
It is poor by property.
Utility model content
For the problems in the relevant technologies, the utility model proposes a kind of monitoring water quality on line sampling pretreatment device, with
Overcome above-mentioned technical problem present in existing the relevant technologies.
The technical solution of the utility model is achieved in that
A kind of monitoring water quality on line sampling pretreatment device, including signal amplification unit and transmission processing unit；
The output end of signal amplification unit and the input terminal of transmission processing unit connect；
Signal amplification unit, including triode Q1, triode Q2, operational amplifier U1:A, operational amplifier U1:B, operation
Amplifier U2:A, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, two
Pole pipe D1, diode D2, capacitor C1 and capacitor C2；
A termination input signal of the resistance R1, the other end of the resistance R1 base stage with the triode Q1 respectively
Connection, the emitter of the triode Q1 are connect with the emitter of the triode Q2, the collector difference of the triode Q1
It is connect with the inverting input terminal of the cathode of the diode D1, one end of the capacitor C1 and the operational amplifier U1:A, institute
The anode for stating diode D1 is connect with one end of one end of the resistance R3, the resistance R5 respectively, and the resistance R5's is another
End respectively with one end of the resistance R4, the diode D2 anode connect, the cathode of the diode D2 respectively with it is described
The base stage connection of one end of resistance R2, the triode Q2, another termination input signal of the resistance R2, the triode Q1
Collector connect respectively with one end of the inverting input terminal of the operational amplifier U1:B, the capacitor C2, the operation is put
The non-inverting input terminal of big device U1:A is connect with the non-inverting input terminal of the operational amplifier U1:B, the operational amplifier U1:A's
Output end is connect with one end of the other end of the capacitor C1, the other end of the resistance R3 and the resistance R6 respectively, described
The other end of resistance R6 is connect with the inverting input terminal of the other end of the resistance R8, the operational amplifier U2:A respectively, institute
The non-inverting input terminal for stating operational amplifier U2:A is connect with one end of one end of the resistance R7, the resistance R9 respectively, described
The other end of the resistance R7 other end and the capacitor C1 with the output end of the operational amplifier U1:B, the resistance R4 respectively
Other end connection, the output end of the operational amplifier U2:A connect with the other end of the resistance R8；
Transmission processing unit, including operational amplifier U2:B, resistance R10, resistance R11, capacitor C3, capacitor C4, capacitor C5,
Capacitor C6, integrated chip U3 and crystal oscillator X1；
The non-inverting input terminal of the operational amplifier U2:B is connect with the other end of the resistance R9, the operational amplifier
The inverting input terminal of U2:B respectively with one end of the resistance R10, one end of the capacitor C3, the operational amplifier U2:A
Output end is connected with the other end of the resistance R8, and the output end of the operational amplifier U2:B is respectively with the resistance R10's
The other end, the capacitor C3 the other end connected with the 3rd pin of the integrated chip U3, the 9th of the integrated chip U3 is drawn
Foot is connect with one end of one end of the resistance R11, the capacitor C6 respectively, the other end and the capacitor of the resistance R11
The other end of C6 is grounded, the 18th pin of the integrated chip U3 respectively with one end of the capacitor C5, the crystal oscillator X1
One end connection, the 19th pin of the integrated chip U3 connect with the other end of one end of the capacitor C4, the crystal oscillator X1 respectively
It connects, the other end of the capacitor C4 and the other end of the capacitor C5 are grounded, and the 31st pin of the integrated chip U3 connects electricity
Source voltage, the integrated chip U1 are single-chip computer AT89C52.
Further, the resistance R1, the resistance R2 resistance value be 400 Ω, the electric current of input signal can be changed.
Further, the triode Q1, the triode Q2 are triode S8050, can make the operational amplifier
U1:A, the operational amplifier U1:B reduce fever and improve stability.
Further, the capacitance size of the capacitor C1 and capacitor C2 is 10uF, can be divided；The capacitor C3
Capacitance size be 1000uF, can divide.
Further, the operational amplifier U1:A, the operational amplifier U1:B and the operational amplifier U2:A are
Operational amplifier AD620 can make up three amplifier amplifying circuits.
The utility model has the following beneficial effects: can use when monitoring water quality on line samples, amplify electricity by three amplifiers
The advantages of road high cmrr, high input impedance and low noise, guarantees the measurement accuracy in monitoring water quality on line sampling, more
Add reliable.
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
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is a kind of monitoring water quality on line sampling pretreatment device circuit diagram according to the utility model embodiment.
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's every other embodiment obtained, all belongs to
In the range of the utility model protection.
Embodiment according to the present utility model provides a kind of monitoring water quality on line sampling pretreatment device.
As shown in Figure 1, according to the monitoring water quality on line sampling pretreatment device of the utility model embodiment, including signal is put
Big unit and transmission processing unit；
The output end of signal amplification unit and the input terminal of transmission processing unit connect；
Signal amplification unit, including triode Q1, triode Q2, operational amplifier U1:A, operational amplifier U1:B, operation
Amplifier U2:A, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, two
Pole pipe D1, diode D2, capacitor C1 and capacitor C2；
A termination input signal of the resistance R1, the other end of the resistance R1 base stage with the triode Q1 respectively
Connection, the triode Q1 are connect by emitter with the emitter of the triode Q2, and the triode Q1 passes through collector
Connect respectively with the inverting input terminal of the cathode of the diode D1, one end of the capacitor C1 and the operational amplifier U1:A
It connects, the diode D1 is connect with one end of one end of the resistance R3, the resistance R5 respectively by anode, the resistance R5
The other end respectively with one end of the resistance R4, the diode D2 anode connect, the diode D2 pass through cathode divide
It is not connect with the base stage of one end of the resistance R2, the triode Q2, another termination input signal of the resistance R2 is described
Triode Q1 is connect with one end of the inverting input terminal of the operational amplifier U1:B, the capacitor C2 respectively by collector,
The operational amplifier U1:A is connect by non-inverting input terminal with the non-inverting input terminal of the operational amplifier U1:B, the operation
Amplifier U1:A by output end respectively with the other end of the capacitor C1, the other end of the resistance R3 and the resistance R6
One end connection, the other end of the resistance R6 reverse phase with the other end of the resistance R8, the operational amplifier U2:A respectively
Input terminal connection, the operational amplifier U2:A by non-inverting input terminal respectively with one end of the resistance R7, the resistance R9
One end connection, the other end of the resistance R7 respectively with the output end of the operational amplifier U1:B, the resistance R4 it is another
One end is connected with the other end of the capacitor C1, and the operational amplifier U2:A passes through the other end of output end and the resistance R8
Connection；
Transmission processing unit, including operational amplifier U2:B, resistance R10, resistance R11, capacitor C3, capacitor C4, capacitor C5,
Capacitor C6, integrated chip U3 and crystal oscillator X1；
The operational amplifier U2:B is connect by non-inverting input terminal with the other end of the resistance R9, the operation amplifier
Device U2:B by inverting input terminal respectively with one end of the resistance R10, one end of the capacitor C3, the operational amplifier
The output end of U2:A is connected with the other end of the resistance R8, the operational amplifier U2:B by output end respectively with the electricity
The other end of the other end, the capacitor C3 that hinder R10 is connected with the 3rd pin of the integrated chip U3, the integrated chip U3
Connect respectively with one end of one end of the resistance R11, the capacitor C6 by the 9th pin, the other end of the resistance R11 with
The other end of the capacitor C6 is grounded, the integrated chip U3 by the 18th pin respectively with one end of the capacitor C5, institute
State crystal oscillator X1 one end connection, the integrated chip U3 by the 19th pin respectively with one end of the capacitor C4, the crystal oscillator
The other end of X1 connects, and the other end of the capacitor C4 and the other end of the capacitor C5 are grounded, and the integrated chip U3 is logical
It crosses the 31st pin and connects supply voltage.
In one embodiment, the resistance R1, the resistance R2 resistance value be 400 Ω, can adjust input letter
Number size of current.
In one embodiment, the triode Q1, the triode Q2 are a kind of triode S8050, can make institute
It states operational amplifier U1:A, the operational amplifier U1:B and reduces fever, to improve the stability of circuit.
In one embodiment, the capacitance size of the capacitor C1 and capacitor C2 is 10uF, can be described
Operational amplifier U1:A, the operational amplifier U1:B partial pressure；The capacitance size of the capacitor C3 is 1000uF, can be institute
State operational amplifier U2:B partial pressure.
In one embodiment, the diode D1, the diode D2 are a kind of diode 1N4148, be can be used in
Electric power polarity reverse protection.
In one embodiment, the operational amplifier U1:A, the operational amplifier U1:B and the operational amplifier
U2:A is a kind of operational amplifier AD620, can make up three amplifier amplifying circuits, improves common-mode rejection ratio, the input of circuit
Impedance and the noise for reducing circuit guarantee the measurement accuracy in monitoring water quality on line sampling.
In one embodiment, the integrated chip U1 is a kind of single-chip computer AT89C52, can be to input signal at
Reason.
Working principle: triode Q1, triode Q2, operational amplifier U1:A, operational amplifier U1:B, operational amplifier
U2:A, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, diode D1,
Diode D2, capacitor C1 and capacitor C2 form signal amplification unit；The effect of the resistance R1, the resistance R2 are that adjustment is defeated
Enter the size of current of signal；The effect of the triode Q1, the triode Q2 are to make the operational amplifier U1:A, the fortune
It calculates amplifier U1:B and reduces fever, to improve the stability of circuit；The effect of the capacitor C1 and capacitor C2 is for institute
State operational amplifier U1:A, the operational amplifier U1:B partial pressure；The effect of the diode D1, the diode D2 are to provide
Electric power polarity reverse protection；The operational amplifier U1:A, the operational amplifier U1:B and the operational amplifier U2:A
Effect be three amplifier amplifying circuits of composition, improve the common-mode rejection ratio of circuit, input impedance and the noise for reducing circuit, guarantee
Measurement accuracy in monitoring water quality on line sampling.
Operational amplifier U2:B, resistance R10, resistance R11, capacitor C3, capacitor C4, capacitor C5, capacitor C6, integrated chip U3
And crystal oscillator X1 forms transmission processing unit；The effect of the capacitor C3 is for operational amplifier U2:B partial pressure；The fortune
The effect for calculating amplifier U2:B is to carry out noise reducing and enhanced processing to input signal；The work of the resistance R11, the capacitor C6
Be composition reset circuit；The effect of the capacitor C4, the capacitor C5 and crystal oscillator X1 are composition clock circuits.
In conclusion by means of the above-mentioned technical proposal of the utility model, by designing a kind of monitoring water quality on line sampling
Pretreatment unit can be used when monitoring water quality on line samples, and pass through three amplifier amplifying circuit high cmrrs, high input
The advantages of impedance and low noise, guarantees the measurement accuracy in monitoring water quality on line sampling, relatively reliable.
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 (6)
1. a kind of monitoring water quality on line sampling pretreatment device, which is characterized in that including signal amplification unit and transmission process list
Member；
The output end of signal amplification unit and the input terminal of transmission processing unit connect；
Signal amplification unit, including triode Q1, triode Q2, operational amplifier U1:A, operational amplifier U1:B, operation amplifier
Device U2:A, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, diode
D1, diode D2, capacitor C1 and capacitor C2；
A termination input signal of the resistance R1, the other end of the resistance R1 connect with the base stage of the triode Q1 respectively
Connect, the emitter of the triode Q1 is connect with the emitter of the triode Q2, the collector of the triode Q1 respectively with
The cathode of the diode D1, the capacitor C1 one end connected with the inverting input terminal of the operational amplifier U1:A, it is described
The anode of diode D1 is connect with one end of one end of the resistance R3, the resistance R5 respectively, the other end of the resistance R5
Respectively with one end of the resistance R4, the diode D2 anode connect, the cathode of the diode D2 respectively with the electricity
The base stage of one end, the triode Q2 for hindering R2 connects, another termination input signal of the resistance R2, the triode Q1's
Collector is connect with one end of the inverting input terminal of the operational amplifier U1:B, the capacitor C2 respectively, the operation amplifier
The non-inverting input terminal of device U1:A is connect with the non-inverting input terminal of the operational amplifier U1:B, and the operational amplifier U1:A's is defeated
Outlet is connect with one end of the other end of the capacitor C1, the other end of the resistance R3 and the resistance R6 respectively, the electricity
The other end of resistance R6 is connect with the inverting input terminal of the other end of the resistance R8, the operational amplifier U2:A respectively, described
The non-inverting input terminal of operational amplifier U2:A is connect with one end of one end of the resistance R7, the resistance R9 respectively, the electricity
Hinder R7 the other end respectively with the output end of the operational amplifier U1:B, the other end of the resistance R4 and the capacitor C1
Other end connection, the output end of the operational amplifier U2:A are connect with the other end of the resistance R8；
Transmission processing unit, including operational amplifier U2:B, resistance R10, resistance R11, capacitor C3, capacitor C4, capacitor C5, capacitor
C6, integrated chip U3 and crystal oscillator X1；
The non-inverting input terminal of the operational amplifier U2:B is connect with the other end of the resistance R9, the operational amplifier U2:B
The inverting input terminal output with one end of the resistance R10, one end, the operational amplifier U2:A of the capacitor C3 respectively
End is connected with the other end of the resistance R8, and the output end of the operational amplifier U2:B is another with the resistance R10 respectively
It holds, the other end of the capacitor C3 is connected with the 3rd pin of the integrated chip U3, the 9th pin point of the integrated chip U3
It is not connect with one end of one end of the resistance R11, the capacitor C6, the other end of the resistance R11 is with the capacitor C6's
The other end is grounded, the 18th pin of integrated chip U3 one end with one end of the capacitor C5, the crystal oscillator X1 respectively
Connection, the 19th pin of the integrated chip U3 are connect with the other end of one end of the capacitor C4, the crystal oscillator X1 respectively, institute
The other end for stating the other end and the capacitor C5 of capacitor C4 is grounded, and the 31st pin of the integrated chip U3 connects power supply electricity
Pressure.
2. a kind of monitoring water quality on line sampling pretreatment device according to claim 1, which is characterized in that the resistance
R1, the resistance R2 resistance value be 400 Ω.
3. a kind of monitoring water quality on line sampling pretreatment device according to claim 1, which is characterized in that the triode
Q1, the triode Q2 are triode S8050.
4. a kind of monitoring water quality on line sampling pretreatment device according to claim 1, which is characterized in that the capacitor C1
Capacitance size with the capacitor C2 is 10uF；The capacitance size of the capacitor C3 is 1000uF.
5. a kind of monitoring water quality on line sampling pretreatment device according to claim 1, which is characterized in that the operation is put
Big device U1:A, the operational amplifier U1:B and the operational amplifier U2:A are operational amplifier AD620.
6. a kind of monitoring water quality on line sampling pretreatment device according to claim 1, which is characterized in that the integrated core
Piece U1 is single-chip computer AT89C52.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920736178.0U CN209231024U (en) | 2019-05-22 | 2019-05-22 | A kind of monitoring water quality on line sampling pretreatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920736178.0U CN209231024U (en) | 2019-05-22 | 2019-05-22 | A kind of monitoring water quality on line sampling pretreatment device |
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| Publication Number | Publication Date |
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| CN209231024U true CN209231024U (en) | 2019-08-09 |
Family
ID=67511493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201920736178.0U Active CN209231024U (en) | 2019-05-22 | 2019-05-22 | A kind of monitoring water quality on line sampling pretreatment device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618245A (en) * | 2019-09-30 | 2019-12-27 | 河南沃海水务有限公司 | Water quality data preprocessing circuit |
| CN112255379A (en) * | 2020-08-05 | 2021-01-22 | 海德星科技南京有限公司 | Signal processing circuit and processing method based on river water quality automatic monitoring system |
-
2019
- 2019-05-22 CN CN201920736178.0U patent/CN209231024U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618245A (en) * | 2019-09-30 | 2019-12-27 | 河南沃海水务有限公司 | Water quality data preprocessing circuit |
| CN112255379A (en) * | 2020-08-05 | 2021-01-22 | 海德星科技南京有限公司 | Signal processing circuit and processing method based on river water quality automatic monitoring system |
| CN112255379B (en) * | 2020-08-05 | 2021-08-10 | 海德星科技南京有限公司 | Signal processing circuit and processing method based on river water quality automatic monitoring system |
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