CN105634421A - Signal amplification module used for water quality monitoring terminal - Google Patents
Signal amplification module used for water quality monitoring terminal Download PDFInfo
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- CN105634421A CN105634421A CN201410576145.6A CN201410576145A CN105634421A CN 105634421 A CN105634421 A CN 105634421A CN 201410576145 A CN201410576145 A CN 201410576145A CN 105634421 A CN105634421 A CN 105634421A
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- water quality
- resistance
- operational amplifier
- quality monitoring
- amplification module
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Abstract
The invention discloses a signal amplification module used for a water quality monitoring terminal. The signal amplification module comprises a signal input circuit, a fourth resistor, a fifth resistor, an NPN audion, an operational amplifier, a second capacitor and a signal output circuit. The signal input circuit is connected with a base electrode of the NPN audion. Two ends of the fifth resistor are connected with a collector of the NPN audion and an in-phase input end of the operational amplifier.One end of a parallel branch composed by the fourth resistor and the second capacitor is connected with an anti-phase input end of the operational amplifier and the other end thereof is connected with an output end of the operational amplifier. The signal output circuit is connected with an output end of the operational amplifier.The signal amplification module used for the water quality monitoring terminal has following beneficial effects: the signal amplification module is simple in overall structure, convenient in realization and low in cost; and a detection signal of a water quality sensor can be amplified during application so that the water quality monitoring terminal can make analyses of normal data and water quality monitoring accuracy can be ensured.
Description
Technical field
The present invention relates to water quality monitoring field, specifically a kind of signal amplification module for 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 a kind of signal amplification module for 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: a kind of signal amplification module for water quality monitoring terminal, including signal input line road, the 4th resistance, the 5th resistance, NPN audion, operational amplifier, the second electric capacity and output line road, described signal input line road is connected with the base stage of NPN audion, and the 5th resistance two ends connect the in-phase input end of NPN transistor collector and operational amplifier respectively; Parallel branch one end that described 4th resistance and the second Capacitance parallel connection are constituted is connected with the inverting input of operational amplifier, and its other end is connected with the outfan of operational amplifier, and described output line road is connected with the outfan of operational amplifier.
Further, a kind of signal amplification module for water quality monitoring terminal, also include the first resistance, described first resistance two ends are connected with the base stage of NPN audion and colelctor electrode respectively.
Further, a kind of signal amplification module for water quality monitoring terminal, also include the second resistance, described second resistance one end is connected with NPN transistor emitter, its other end ground connection.
Further, a kind of signal amplification module for water quality monitoring terminal, it is characterised in that also include the 3rd resistance and the first electric capacity, described 3rd resistance two ends are connected with the first electric capacity and operational amplifier inverting input respectively, and the first electric capacity connects the other end ground connection of the 3rd 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 4th resistance, the 5th resistance, NPN audion, operational amplifier, the second electric capacity and output line road, wherein, signal input line road is connected with the base stage of NPN audion, and the 5th resistance two ends connect the in-phase input end of NPN transistor collector and operational amplifier respectively. Parallel branch one end that 4th resistance and the second Capacitance parallel connection are constituted is connected with the inverting input of operational amplifier, and its other end is connected with the outfan of operational amplifier, and output line road is connected with the outfan of 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, signal is carried out input operational amplifier after primary is amplified by NPN audion, operational amplifier is exported by output line road after signal carries out amplification again, and the 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) when the present invention applies, detectable signal is performed twice at amplification through NPN audion and operational amplifier, it is simple to make signal reach the bioassay standard of demand.
(3) the 4th 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 4th resistance and the second electric capacity are constituted, can improve stability when 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, R4, the 4th resistance, R5, the 5th resistance, Q1, NPN audion, A1, 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, a kind of signal amplification module for water quality monitoring terminal, including signal input line road, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, NPN audion Q1, operational amplifier A the 1, first electric capacity C1, the second electric capacity C2 and output line road, wherein, colelctor electrode and the operational amplifier of NPN audion Q1 are respectively connected with power supply VCC, signal input line road is connected with the base stage of NPN audion Q1, and output line road is connected with the outfan of operational amplifier A 1. In the present embodiment, the 5th resistance R5 two ends connect the in-phase input end of NPN audion Q1 colelctor electrode and operational amplifier A 1 respectively, parallel branch one end that 4th resistance R4 and the second electric capacity C2 parallel connection are constituted is connected with the inverting input of operational amplifier A 1, and its other end is connected with the outfan of operational amplifier A 1.
In the present embodiment, the first resistance R1 two ends are connected with the base stage of NPN audion Q1 and colelctor electrode respectively, and second resistance R2 one end is connected with NPN audion Q1 emitter stage, its other end ground connection. In the present embodiment, the 3rd resistance R3 two ends are connected with the first electric capacity C1 and operational amplifier A 1 inverting input respectively, and the first electric capacity C1 connects the other end ground connection of the 3rd resistance R3 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 (5)
1. the signal amplification module for water quality monitoring terminal, it is characterized in that, including signal input line road, the 4th resistance (R4), the 5th resistance (R5), NPN audion (Q1), operational amplifier (A1), the second electric capacity (C2) and output line road, described signal input line road is connected with the base stage of NPN audion (Q1), and the 5th resistance (R5) two ends connect NPN audion (Q1) colelctor electrode and the in-phase input end of operational amplifier (A1) respectively; Described 4th resistance (R4) is connected with the inverting input of operational amplifier (A1) with the second electric capacity (C2) parallel branch one end constituted in parallel, its other end is connected with the outfan of operational amplifier (A1), and described output line road is connected with the outfan of operational amplifier (A1).
2. a kind of signal amplification module for water quality monitoring terminal according to claim 1, it is characterised in that also including the first resistance (R1), described first resistance (R1) two ends are connected with the base stage of NPN audion (Q1) and colelctor electrode respectively.
3. a kind of signal amplification module for water quality monitoring terminal according to claim 1, it is characterised in that also including the second resistance (R2), described second resistance (R2) one end is connected with NPN audion (Q1) emitter stage, its other end ground connection.
4. a kind of signal amplification module for water quality monitoring terminal according to any one in claims 1 to 3, it is characterized in that, also include the 3rd resistance (R3) and the first electric capacity (C1), described 3rd resistance (R3) two ends are connected with the first electric capacity (C1) and operational amplifier (A1) inverting input respectively, and the first electric capacity (C1) connects the other end ground connection that the 3rd resistance (R3) is held relatively.
5. a kind of signal amplification module for water quality monitoring terminal according to claim 4, it is characterised in that described first electric capacity (C1) is polar capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410576145.6A CN105634421A (en) | 2014-10-26 | 2014-10-26 | Signal amplification module used for water quality monitoring terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410576145.6A CN105634421A (en) | 2014-10-26 | 2014-10-26 | Signal amplification module used for water quality monitoring terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105634421A true CN105634421A (en) | 2016-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410576145.6A Pending CN105634421A (en) | 2014-10-26 | 2014-10-26 | Signal amplification module used for water quality monitoring terminal |
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| Country | Link |
|---|---|
| CN (1) | CN105634421A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108363316A (en) * | 2018-02-09 | 2018-08-03 | 成都慧利环保科技有限公司 | A kind of long-distance management system of wastewater treatment equipment |
-
2014
- 2014-10-26 CN CN201410576145.6A patent/CN105634421A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108363316A (en) * | 2018-02-09 | 2018-08-03 | 成都慧利环保科技有限公司 | A kind of long-distance management system of wastewater treatment equipment |
| CN108363316B (en) * | 2018-02-09 | 2021-03-16 | 成都慧利环保科技有限公司 | Remote management system of wastewater treatment device |
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Application publication date: 20160601 |