CN207234741U - A kind of SO 2 sensor modulate circuit - Google Patents
A kind of SO 2 sensor modulate circuit Download PDFInfo
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- CN207234741U CN207234741U CN201721200131.XU CN201721200131U CN207234741U CN 207234741 U CN207234741 U CN 207234741U CN 201721200131 U CN201721200131 U CN 201721200131U CN 207234741 U CN207234741 U CN 207234741U
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Abstract
The utility model discloses a kind of SO 2 sensor modulate circuit, it is characterised in that：W feet including being connected plug connector P4, the plug connector P4 with SO 2 sensor connect operating circuit；The R feet connection reference circuit of the plug connector P4；The C foot linkage counters of the plug connector P4；The operating circuit includes operational amplifier B；The inverting input of operational amplifier B patches the W feet of fitting P4 by series resistor R25 connections；The reference circuit includes operational amplifier A, and the positive input of operational amplifier A is serially connected with resistance R20 and reference voltage Verf0.The SO 2 sensor modulate circuit of the utility model, processing is amplified, filters and stablizes by the detection signal of sensor, the signal for being adapted to analog-to-digital conversion input is obtained, easy to the data processing of system.
Description
Technical field
A kind of SO 2 sensor is the utility model is related to, particularly a kind of SO 2 sensor modulate circuit.
Background technology
With expanding economy and the raising of living standards of the people, industrial pollution, motor vehicle exhaust emission etc., cause huge
Environmental pollution, the news that various regions environment influences occur frequently, and have deepened worry and concern of the common people to place city environmental quality, institute
It is imperative to be monitored in real time to environmental quality.
Environmental quality monitoring mainly by the detection of the content, discharge capacity of various materials influential on the mankind and environment,
The change of tracking environmental quality, determines environmental quality level；Sulfur dioxide is a kind of colourless gas with intense irritation smell
Body, is easily soluble in the blood and other stickiness liquid of human body；Sulfur dioxide in air can cause household register to inflammation, bronchitis,
Pulmonary emphysema, eye conjunctiva inflammation etc.；Also teen-age immunity can at the same time reduced, disease resistance dies down；Sulfur dioxide is aoxidizing
Under the action of agent, light, sulfate aerosol can be generated, sulfate aerosol can make one pathogenic, increase patient death rate；According to warp
Help cooperative development tissue（OECD）Research, when sulfate year, concentration was in 10 μ g/m3 or so, often reduce 10% concentration can make
The death rate reduces by 0.5%；Sulfur dioxide can also stick with the floating dust in air, floating dust of the suction with SO2 when human body respiration,
It can make the toxicity of SO2 strengthen.Sulfur dioxide is to cause one of main matter of air pollution, very big to human health damage, is needed
It is monitored.In general, SO 2 sensor signal cannot be converted directly into numerical data, this is because sulfur dioxide
Sensor output is fairly small voltage, electric current or resistance variations, therefore, must be nursed one's health before data are transformed to.Adjust
Reason is exactly to amplify, and buffers or calibrate analog signal so as to fit in the input of A/D converter.Then, ADC is to analog signal
It is digitized, and digital signal is sent to microcontroller, for use in the data processing of system.SO 2 sensor and tune
It is particularly important that design of reason circuit becomes.
Utility model content
The goal of the invention of the utility model is：For above-mentioned problem, there is provided a kind of SO 2 sensor tune
Manage circuit.
The technical solution adopted in the utility model is as follows：
A kind of SO 2 sensor modulate circuit of the utility model, including it is connected plug connector with SO 2 sensor
The W feet connection operating circuit of P4, the plug connector P4；The R feet connection reference circuit of the plug connector P4；The plug connector P4's
C foot linkage counters.
Further, the operating circuit includes operational amplifier B；The inverting input of operational amplifier B is by concatenating electricity
Hinder the W feet of R25 connection plug connectors P4；Positive input series resistor R27, resistance R27 the connection reference voltage of operational amplifier B
Verf1；It is serially connected with resistance R26 on the output terminal of operational amplifier B, resistance R26 respectively and is connected to capacitance C34 and zener diode
D5；Respectively and resistance R24 and capacitance C33 are connected between the inverting input and output terminal of operational amplifier B.
Further, the reference circuit includes operational amplifier A, and the positive input of operational amplifier A is serially connected with resistance
R20 and reference voltage Verf0；The inverting input of operational amplifier A is serially connected with resistance R19 and resistance R18, resistance R18 connections
The R feet of plug connector P4；The C feet of the output terminal connection plug connector P4 of operational amplifier A.
Further, between the C feet of the plug connector P4 and R feet connection circuit and it is connected to capacitance C30；The operational amplifier
The power circuit of A includes filter circuit, and filter circuit is additionally arranged in the power circuit of operational amplifier B.
Further, the inductance concatenated between the filter circuit includes and connects capacitance C31 and C32, and C31 and C32
L6。
Further, reference voltage Verf0 connections Verf, Verf the connection shunt regulator circuit；The Verf0 accesses electricity
Between hindering R15 and resistance R22, resistance R22 other ends ground connection, resistance R15 other ends connection Verf；The Verf1 accesses resistance
Between R14 and resistance R21, resistance R21 other ends ground connection, resistance R14 other ends connection Verf.
Further, the shunt regulator circuit includes the reference pole connection parallel connection of controllable accurate source of stable pressure TL431, TL431
Resistance R17 and resistance R23, TL431 plus earth, cathode series resistor R16, resistance R16 the connection voltage of TL431.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are：The two of the utility model
Sulfur oxide Conditioning Circuits of Sensor, is amplified, filters and stablizes processing by the detection signal of sensor, obtain stability criterion
Signal, the data processing for system.
Brief description of the drawings
Fig. 1 is a kind of SO 2 sensor modulate circuit figure of utility model.
Embodiment
Below in conjunction with the accompanying drawings, the utility model is described in detail.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated the utility model.It should be appreciated that specific embodiment described herein is only explaining this
Utility model, is not used to limit the utility model.
As shown in Figure 1, a kind of SO 2 sensor modulate circuit of the utility model, including connect with SO 2 sensor
Patch the W feet connection operating circuit of fitting P4, the plug connector P4；The R feet connection reference circuit of the plug connector P4；It is described to insert
The C foot linkage counters of fitting P4.
Operating circuit, including operational amplifier B；The inverting input of operational amplifier B is inserted by series resistor R25 connections
The W feet of fitting P4；Positive input series resistor R27, the resistance R27 connection reference voltage Verf1 of operational amplifier B；Computing
It is serially connected with resistance R26 on the output terminal of amplifier B, resistance R26 respectively and is connected to capacitance C34 and zener diode D5；Computing is put
Respectively and resistance R24 and capacitance C33 are connected between the inverting input and output terminal of big device B.
Reference circuit, including operational amplifier A, the positive input of operational amplifier A are serially connected with resistance R20 and with reference to electricity
Press Verf0；The inverting input of operational amplifier A is serially connected with resistance R19 and resistance R18, the R of resistance R18 connection plug connectors P4
Foot；The C feet of the output terminal connection plug connector P4 of operational amplifier A；Between C feet and R feet the connection circuit of the plug connector P4 simultaneously
It is connected to capacitance C30；The power circuit of the operational amplifier A and operational amplifier B include filter circuit.
Filter circuit, including and the inductance L6 that is concatenated between the capacitance C31 and C32, and C31 and C32 that connect.
Reference voltage Verf0 connections Verf, Verf the connection shunt regulator circuit；Verf0 access resistance R15 and
Between resistance R22, resistance R22 other ends ground connection, resistance R15 other ends connection Verf；The Verf1 access resistance R14 and electricity
Between hindering R21, resistance R21 other ends ground connection, resistance R14 other ends connection Verf.
The shunt regulator circuit includes the resistance of the reference pole connection parallel connection of controllable accurate source of stable pressure TL431, TL431
The plus earth of R17 and resistance R23, TL431, cathode series resistor R16, resistance R16 the connection voltage of TL431.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (7)
- A kind of 1. SO 2 sensor modulate circuit, it is characterised in that：Including being connected plug connector P4 with SO 2 sensor, The W feet connection operating circuit of the plug connector P4；The R feet connection reference circuit of the plug connector P4；The C feet of the plug connector P4 Linkage counter.
- 2. SO 2 sensor modulate circuit according to claim 1, it is characterised in that：The operating circuit includes fortune Calculate amplifier B；The W feet that the inverting input of operational amplifier B passes through series resistor R25 connection plug connectors P4；Operational amplifier B Positive input series resistor R27, resistance R27 connection reference voltage Verf1；It is serially connected with the output terminal of operational amplifier B Resistance R26, resistance R26 respectively and are connected to capacitance C34 and zener diode D5；The inverting input of operational amplifier B and output Respectively and resistance R24 and capacitance C33 are connected between end.
- 3. SO 2 sensor modulate circuit according to claim 1, it is characterised in that：The reference circuit includes fortune Amplifier A is calculated, the positive input of operational amplifier A is serially connected with resistance R20 and reference voltage Verf0；Operational amplifier A it is anti- Phase input terminal is serially connected with resistance R19 and resistance R18, the R feet of resistance R18 connection plug connectors P4；The output terminal of operational amplifier A connects Patch the C feet of fitting P4.
- 4. SO 2 sensor modulate circuit according to claim 3, it is characterised in that：The C feet of the plug connector P4 Connected R feet between circuit and be connected to capacitance C30；The power circuit of the operational amplifier A includes filter circuit, filter circuit It is additionally arranged in the power circuit of operational amplifier B.
- 5. SO 2 sensor modulate circuit according to claim 4, it is characterised in that：The filter circuit is included simultaneously The inductance L6 concatenated between the capacitance C31 and C32, and C31 and C32 that connect.
- 6. SO 2 sensor modulate circuit according to claim 3, it is characterised in that：The reference voltage Verf0 Connect Verf, Verf connection shunt regulator circuits；Between the Verf0 accesses resistance R15 and resistance R22, the resistance R22 other ends Ground connection, resistance R15 other ends connection Verf；Between the Verf1 accesses resistance R14 and resistance R21, another terminations of resistance R21 Ground, resistance R14 other ends connection Verf.
- 7. SO 2 sensor modulate circuit according to claim 6, it is characterised in that：The shunt regulator circuit bag The resistance R17 of reference pole connection parallel connection and the anode of resistance R23, TL431 for including controllable accurate source of stable pressure TL431, TL431 connect Ground, cathode series resistor R16, resistance R16 the connection voltage of TL431.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721200131.XU CN207234741U (en) | 2017-09-19 | 2017-09-19 | A kind of SO 2 sensor modulate circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721200131.XU CN207234741U (en) | 2017-09-19 | 2017-09-19 | A kind of SO 2 sensor modulate circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207234741U true CN207234741U (en) | 2018-04-13 |
Family
ID=61862654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721200131.XU Active CN207234741U (en) | 2017-09-19 | 2017-09-19 | A kind of SO 2 sensor modulate circuit |
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| Country | Link |
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| CN (1) | CN207234741U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332784A (en) * | 2020-10-30 | 2021-02-05 | 上海航天测控通信研究所 | Low-noise high-gain direct current amplification integrating circuit for radiometer receiver |
-
2017
- 2017-09-19 CN CN201721200131.XU patent/CN207234741U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332784A (en) * | 2020-10-30 | 2021-02-05 | 上海航天测控通信研究所 | Low-noise high-gain direct current amplification integrating circuit for radiometer receiver |
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