CN105628887A - Water quality monitoring terminal signal amplification circuit - Google Patents
Water quality monitoring terminal signal amplification circuit Download PDFInfo
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- CN105628887A CN105628887A CN201410576155.XA CN201410576155A CN105628887A CN 105628887 A CN105628887 A CN 105628887A CN 201410576155 A CN201410576155 A CN 201410576155A CN 105628887 A CN105628887 A CN 105628887A
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- water quality
- operational amplifier
- quality monitoring
- resistance
- signal
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Abstract
The present invention discloses a water quality monitoring terminal signal amplification circuit, which comprises a signal input circuit, a first resistor (R1), a first operational amplifier (A1), a third resistor (R3), a second capacitor (C2) and a signal output circuit, wherein both terminals of the first resistor (R1) are respectively connected to the signal input circuit and the non-inverting input terminal of the first operational amplifier (A1), one terminal of a parallel connection branch circuit formed from the third resistor (R3) and second capacitor (C2) is connected to the inverting input terminal of the first operational amplifier (A1), the other terminal is connected to the output terminal of the first operational amplifier (A1), and the signal output circuit is connected to the output terminal of the first operational amplifier (A1). According to the present invention, the water quality monitoring terminal signal amplification circuit has characteristics of simple whole structure, easy achieving, and low cost; and when the water quality monitoring terminal signal amplification circuit is used, the water quality sensor detection signal can be amplified, such that the normal data analysis at the water quality monitoring terminal can be easily performed, and the accuracy of the water quality monitoring can be ensured.
Description
Technical field
The present invention relates to water quality monitoring field, the amplifying circuit of signal in specifically water quality monitoring terminal.
Background technology
Along with the development of society, people are to relying the environment in existence increasingly to pay attention to, and as the pith of environmental conservation, environmental monitoring is the important technical of environmental law enforcement supervision, carry the important function providing technical support and service into Environmental Decision-making and management. Water quality monitoring, as the one of environmental monitoring, refers to monitoring and measures the kind of pollutant, the concentration of each pollutant and variation tendency, the process of evaluating water quality situation in water body. Be commonly equipped with water quality monitoring terminal now when carrying out water quality monitoring, the water quality data of on-the-spot water body to be measured is sampled by water quality monitoring terminal by water quality sensor, is then analyzed water quality data processing. The signal that in existing water quality monitoring terminal, water quality sensor detects is fainter when exporting, and is not easy to water quality monitoring terminal and makes corresponding judgement, and this influences whether the accuracy of water quality monitoring.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that the amplifying circuit of signal in a kind of water quality monitoring terminal, its signal that can water quality sensor be detected is amplified, it is ensured that water quality monitoring terminal carries out the accuracy of water quality monitoring.
This invention address that the problems referred to above are achieved through the following technical solutions: the amplifying circuit of signal in water quality monitoring terminal, including signal input line road, the first resistance, the first operational amplifier, the 3rd resistance, the second electric capacity and output line road, described first resistance one end is connected with signal input line road, and its other end connects the in-phase input end of the first operational amplifier; Parallel branch one end that described 3rd resistance and the second Capacitance parallel connection are constituted is connected with the inverting input of the first operational amplifier, the outfan of its other end and the first operational amplifier connects, described first operational amplifier is connected to power supply, and output line road is connected with the outfan of the first operational amplifier.
Further, the amplifying circuit of signal in water quality monitoring terminal, also including the second resistance and the first electric capacity, described second resistance two ends are connected with the first electric capacity and the first operational amplifier inverting input respectively, and the first electric capacity connects the other end ground connection of the second resistance terminal relatively.
Further, described first electric capacity is polar capacitor.
In sum, the method have the advantages that (1) present invention includes signal input line road, the first resistance, the first operational amplifier, the 3rd resistance, the second electric capacity and output line road, wherein, first resistance one end is connected with signal input line road, and its other end connects the in-phase input end of the first operational amplifier. Parallel branch one end that 3rd resistance and the second Capacitance parallel connection are constituted is connected with the inverting input of the first operational amplifier, the outfan of its other end and the first operational amplifier connects, first operational amplifier is connected to power supply, and output line road is connected with the outfan of the first operational amplifier. Overall structure of the present invention is simple, use components and parts are few, cost is low, when the present invention applies, the signal of water quality sensor detection is inputted by signal input line road, first operational amplifier exports after signal is amplified, signal after amplification is easy to water quality monitoring terminal and detectable signal is analyzed, and then can guarantee that the accuracy of water quality monitoring terminal monitoring.
(2) the 3rd resistance of the present invention and the second electric capacity constitute feedback circuit, and feedback signal is filtered by the second electric capacity, by the feedback circuit that the 3rd resistance and the second electric capacity are constituted, can improve stability when the first operational amplifier amplifies signal.
Accompanying drawing explanation
Fig. 1 is the structural representation of one specific embodiment of the present invention.
In accompanying drawing, the name corresponding to accompanying drawing labelling is called: C1, the first electric capacity, C2, the second electric capacity, R1, the first resistance, R2, the second resistance, R3, the 3rd resistance, A1, the first operational amplifier, VCC, power supply.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is done detailed description further, but embodiments of the present invention are not limited to this.
Embodiment:
As shown in Figure 1, the amplifying circuit of signal in water quality monitoring terminal, including signal input line road, the first resistance R1, the second resistance R2, the 3rd resistance R3, first operational amplifier A the 1, first electric capacity C1, the second electric capacity C2 and output line road, wherein, first resistance R1 one end is connected with signal input line road, and its other end connects the in-phase input end of the first operational amplifier A 1. Parallel branch one end that 3rd resistance R3 and the second electric capacity C2 parallel connection are constituted is connected with the inverting input of the first operational amplifier A 1, and the outfan of its other end and the first operational amplifier A 1 connects. In the present embodiment, the first operational amplifier A 1 is connected to power supply VCC, and output line road is connected with the outfan of the first operational amplifier A 1.
The second resistance R2 two ends of the present embodiment are connected with the first electric capacity C1 and the first operational amplifier A 1 inverting input respectively, and the first electric capacity C1 connects the other end ground connection of the second resistance R2 end relatively. Wherein, the first electric capacity C1 is polar capacitor.
As it has been described above, the present invention can be realized preferably.
Claims (3)
1. the amplifying circuit of signal in water quality monitoring terminal, it is characterized in that, including signal input line road, the first resistance (R1), the first operational amplifier (A1), the 3rd resistance (R3), the second electric capacity (C2) and output line road, described first resistance (R1) one end is connected with signal input line road, and its other end connects the in-phase input end of the first operational amplifier (A1); Described 3rd resistance (R3) is connected with the inverting input of the first operational amplifier (A1) with the second electric capacity (C2) parallel branch one end constituted in parallel, the outfan of its other end and the first operational amplifier (A1) connects, described first operational amplifier (A1) is connected to power supply (VCC), and output line road is connected with the outfan of the first operational amplifier (A1).
2. the amplifying circuit of signal in water quality monitoring terminal according to claim 1, it is characterized in that, also include the second resistance (R2) and the first electric capacity (C1), described second resistance (R2) two ends are connected with the first electric capacity (C1) and the first operational amplifier (A1) inverting input respectively, and the first electric capacity (C1) connects the other end ground connection that the second resistance (R2) is held relatively.
3. the amplifying circuit of signal in water quality monitoring terminal according to claim 2, it is characterised in that described first electric capacity (C1) is polar capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410576155.XA CN105628887A (en) | 2014-10-26 | 2014-10-26 | Water quality monitoring terminal signal amplification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410576155.XA CN105628887A (en) | 2014-10-26 | 2014-10-26 | Water quality monitoring terminal signal amplification circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105628887A true CN105628887A (en) | 2016-06-01 |
Family
ID=56044021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410576155.XA Pending CN105628887A (en) | 2014-10-26 | 2014-10-26 | Water quality monitoring terminal signal amplification circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105628887A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106911311A (en) * | 2017-01-18 | 2017-06-30 | 广西师范学院 | For the signal amplification circuit of water quality monitoring |
| CN108594737A (en) * | 2018-02-09 | 2018-09-28 | 成都慧利环保科技有限公司 | Wastewater treatment equipment operation monitoring system |
-
2014
- 2014-10-26 CN CN201410576155.XA patent/CN105628887A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106911311A (en) * | 2017-01-18 | 2017-06-30 | 广西师范学院 | For the signal amplification circuit of water quality monitoring |
| CN108594737A (en) * | 2018-02-09 | 2018-09-28 | 成都慧利环保科技有限公司 | Wastewater treatment equipment operation monitoring system |
| CN108594737B (en) * | 2018-02-09 | 2021-06-11 | 广西北投环保水务集团有限公司 | Wastewater treatment device operation monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160601 |
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| WD01 | Invention patent application deemed withdrawn after publication |