CN208350571U - A kind of front end data acquisition module of fugitive dust monitoring device - Google Patents
A kind of front end data acquisition module of fugitive dust monitoring device Download PDFInfo
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- CN208350571U CN208350571U CN201820929376.4U CN201820929376U CN208350571U CN 208350571 U CN208350571 U CN 208350571U CN 201820929376 U CN201820929376 U CN 201820929376U CN 208350571 U CN208350571 U CN 208350571U
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Abstract
The utility model discloses a kind of front end data acquisition modules of fugitive dust monitoring device, including fugitive dust sensor, signal conditioning unit, AD conversion unit, switching value converting unit, fugitive dust information output interface and output switch parameter interface；The output end of the fugitive dust sensor is connect with signal conditioning unit, the output end of signal conditioning unit is connect with AD conversion unit and switching value converting unit respectively, the output end of the AD conversion unit is connect with fugitive dust information output interface, and the output end of the switching value converting unit is connect with output switch parameter interface.The utility model can either be acquired conditioning to fugitive dust monitoring data, also can export the data conversion after conditioning at on-off model, increase the data class of output, improve the application flexibility of front end data acquisition module.
Description
Technical field
The utility model relates to fugitive dust monitorings, more particularly to a kind of front end data acquisition module of fugitive dust monitoring device.
Background technique
In daily life and production, various pollutants all are being discharged to nature daily, to give the mankind
Body, production and life bring harm.In numerous pollutants, dust pollution is a kind of important pollutant, with
The aggravation of haze in recent years, people are also higher and higher to the attention rate of dust pollution, past to obtain accurate dust pollution information
Toward needing to be acquired fugitive dust information using fugitive dust monitoring device, analyze, showing and early warning；The front end number of fugitive dust monitoring device
It is the source of fugitive dust information according to acquisition module, fugitive dust is monitored extremely important.
The front end data acquisition module of fugitive dust monitoring device mainly realizes that the acquisition to fugitive dust data improves, and then passes through number
It is sent to the data processor of fugitive dust monitoring device according to interface, data are analyzed by processor, are shown, and is monitored in fugitive dust
Data generate digital output modul signal (low and high level) when exceeding a certain range and realize controlling alarm；For now, fugitive dust is supervised
Collected fugitive dust monitoring data can only generally be exported by surveying device, and collected data cannot be converted directly into switching value letter
It number is exported, so that the signal type of front end data acquisition module output is more single, the alarm of fugitive dust monitoring device is still wanted
Dependent on data processor, the data processing amount of data processor is increased, and data processor (or its peripheral circuit) goes out
When existing failure, warning device also be can not work normally.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of front end data of fugitive dust monitoring device
Acquisition module can either be acquired conditioning to fugitive dust monitoring data, also can believe the data conversion after conditioning at switching value
It number is exported, increases the data class of output, improve the application flexibility of front end data acquisition module.
The purpose of this utility model is achieved through the following technical solutions: a kind of front end data of fugitive dust monitoring device
Acquisition module, including the output of fugitive dust sensor, signal conditioning unit, AD conversion unit, switching value converting unit, fugitive dust information connect
Mouth and output switch parameter interface；
The output end of the fugitive dust sensor is connect with signal conditioning unit, the output end of signal conditioning unit respectively with AD
Converting unit is connected with switching value converting unit, and the output end of the AD conversion unit is connect with fugitive dust information output interface, institute
The output end for stating switching value converting unit is connect with output switch parameter interface.
Further, the signal conditioning unit includes filter, amplifier and voltage follower circuit, the filter
Input terminal is connect with the output end of fugitive dust sensor, and the output end of the filter is connected by amplifier and voltage follower circuit
It connects, the output end of the voltage follower circuit is connect with AD conversion unit and switching value converting unit respectively.
Further, the voltage follower circuit includes amplifier A1, and the positive input of amplifier A1 is as voltage follow electricity
The signal input part on road, is connected to amplifier；One end of the output end connection first resistor R1 of amplifier A1, first resistor R1's is another
Signal output end of the one end as voltage follower circuit, connect with AD conversion unit and switching value converting unit respectively；The fortune
The output end for putting A1 also passes through high frequency feedback channel and connect with the reverse input end of amplifier A1, the output of the voltage follower circuit
End is also connect by low frequency feedback channel with the reverse input end of amplifier A1.
Further, the high frequency feedback channel has included the first capacitor C1 of feedback effect；The low frequency feedback channel
Second resistance R2 including playing feedback effect, the output end of the voltage follower circuit are also connected with the second capacitor C2 of ground connection.
Further, the switching value converting unit includes reference voltage source and voltage comparator, the voltage comparator
Non-inverting input terminal and the output end of voltage follower circuit connect, the inverting input terminal of voltage comparator and reference voltage source connect
It connects, the output end of voltage comparator is connect with output switch parameter interface.
The beneficial effects of the utility model are: the utility model can either be acquired conditioning to fugitive dust monitoring data,
Data conversion after conditioning can be exported at on-off model, increase the data class of output, improve front end number
According to the application flexibility of acquisition module；In the signal conditioning circuit of fugitive dust sensor output, voltage follower circuit joined,
Buffering buffer action well can be played, while being directly connected to capacitive load in the output end of voltage follower circuit, so as to
Enough filter out the noise of input signal and amplifier itself；By setting high frequency feedback channel and low frequency feedback channel, electricity is improved
Pressure follows the stability of circuit, and self-oscillation occurs when avoiding voltage follower circuit connection capacitive load, enables entire circuit
Enough keep steady operation.
Detailed description of the invention
Fig. 1 is the principles of the present invention block diagram；
Fig. 2 is the schematic illustration of voltage follower circuit.
Specific embodiment
The technical solution of the utility model, but the protection scope of the utility model are described in further detail with reference to the accompanying drawing
It is not limited to as described below.
As shown in Figure 1, a kind of front end data acquisition module of fugitive dust monitoring device, including fugitive dust sensor, signal condition
Unit, AD conversion unit, switching value converting unit, fugitive dust information output interface and output switch parameter interface；
The output end of the fugitive dust sensor is connect with signal conditioning unit, the output end of signal conditioning unit respectively with AD
Converting unit is connected with switching value converting unit, and the output end of the AD conversion unit is connect with fugitive dust information output interface, institute
The output end for stating switching value converting unit is connect with output switch parameter interface.
The signal conditioning unit includes filter, amplifier and voltage follower circuit, the input terminal of the filter with
The output end of fugitive dust sensor connects, and the output end of the filter is connect by amplifier with voltage follower circuit, the electricity
Pressure follows the output end of circuit to connect respectively with AD conversion unit and switching value converting unit.
In embodiments herein, front end data acquisition module can also include independent power supply, power supply electricity
Source is connect with fugitive dust sensor, signal conditioning unit, AD conversion unit, switching value converting unit respectively, realizes that front end data is adopted
Collect the power supply of module.
As shown in Fig. 2, the voltage follower circuit includes amplifier A1, the positive input of amplifier A1 is as voltage follow electricity
The signal input part on road, is connected to amplifier；One end of the output end connection first resistor R1 of amplifier A1, first resistor R1's is another
Signal output end of the one end as voltage follower circuit, connect with AD conversion unit and switching value converting unit respectively；The fortune
The output end for putting A1 also passes through high frequency feedback channel and connect with the reverse input end of amplifier A1, the output of the voltage follower circuit
End is also connect by low frequency feedback channel with the reverse input end of amplifier A1.The high frequency feedback channel has included feedback effect
First capacitor C1；The low frequency feedback channel has included the second resistance R2 of feedback effect, the output of the voltage follower circuit
End is also connected with the second capacitor C2 of ground connection.
The switching value converting unit includes reference voltage source and voltage comparator, the homophase input of the voltage comparator
End is connect with the output end of voltage follower circuit, and the inverting input terminal of voltage comparator is connect with reference voltage source, and voltage compares
The output end of device is connect with output switch parameter interface.
The utility model also has on-off model output function on the basis of fugitive dust acquisition signal output, specifically,
Signal after conditioning is converted to number after signal conditioning unit, through AD conversion unit by the collected signal of fugitive dust sensor
Word signal is exported by fugitive dust information output interface；Signal after conditioning is converted to switching value letter by switching value converting unit
Number, to control the warning device work of rear end in fugitive dust monitoring device；Specifically, the collected signal of fugitive dust sensor is through signal
After conditioning unit, it is input to the non-inverting input terminal of voltage comparator, when fugitive dust concentration is larger, voltage comparator homophase input is big
In anti-phase input (reference voltage source signal), voltage comparator exports high level at this time, when fugitive dust concentration is normal or smaller, electricity
When the homophase input of comparator being pressed to be less than anti-phase input, voltage comparator exports low level, and high/low level can be used as switching
Signal output is measured, realizes the control of rear end equipment, the data class of front end data acquisition module output is increased, improves front end
The application flexibility of data acquisition module；Meanwhile without passing through the data processor inside fugitive dust monitoring device to warning device
It is controlled, reduces the data processing amount of data processor, it will not in data processor (or its peripheral circuit) failure
Influence the normal work of warning device.In the signal conditioning circuit of fugitive dust sensor output, voltage follower circuit joined,
Buffering buffer action well can be played, while being directly connected to capacitive load in the output end of voltage follower circuit, so as to
Enough filter out the noise of input signal and amplifier itself；By setting high frequency feedback channel and low frequency feedback channel, electricity is improved
Pressure follows the stability of circuit, and self-oscillation occurs when avoiding voltage follower circuit connection capacitive load, enables entire circuit
Enough keep steady operation.
Finally it should be noted that above are merely preferred embodiments of the utility model, it is noted that for this technology
For the those of ordinary skill in field, without departing from the principle of this utility model, several improvement and profit can also be made
Decorations, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (5)
1. a kind of front end data acquisition module of fugitive dust monitoring device, it is characterised in that: including fugitive dust sensor, signal condition list
Member, AD conversion unit, switching value converting unit, fugitive dust information output interface and output switch parameter interface；
The output end of the fugitive dust sensor is connect with signal conditioning unit, the output end of signal conditioning unit respectively with AD conversion
Unit is connected with switching value converting unit, and the output end of the AD conversion unit is connect with fugitive dust information output interface, described to open
The output end of pass amount converting unit is connect with output switch parameter interface.
2. a kind of front end data acquisition module of fugitive dust monitoring device according to claim 1, it is characterised in that: the letter
Number conditioning unit includes filter, amplifier and voltage follower circuit, and the input terminal of the filter is defeated with fugitive dust sensor
Outlet connection, the output end of the filter are connect by amplifier with voltage follower circuit, the voltage follower circuit it is defeated
Outlet is connect with AD conversion unit and switching value converting unit respectively.
3. a kind of front end data acquisition module of fugitive dust monitoring device according to claim 2, it is characterised in that: the electricity
It includes amplifier A1 that pressure, which follows circuit, and signal input part of the positive input of amplifier A1 as voltage follower circuit is connected to and puts
Big device；One end of the output end connection first resistor R1 of amplifier A1, the other end of first resistor R1 is as voltage follower circuit
Signal output end is connect with AD conversion unit and switching value converting unit respectively；The output end of the amplifier A1 also passes through high frequency
Feedback channel is connect with the reverse input end of amplifier A1, the output end of the voltage follower circuit also pass through low frequency feedback channel with
The reverse input end of amplifier A1 connects.
4. a kind of front end data acquisition module of fugitive dust monitoring device according to claim 3, it is characterised in that: the height
Frequency feedback channel has included the first capacitor C1 of feedback effect；The low frequency feedback channel has included the second resistance of feedback effect
R2, the output end of the voltage follower circuit are also connected with the second capacitor C2 of ground connection.
5. a kind of front end data acquisition module of fugitive dust monitoring device according to claim 1, it is characterised in that: described to open
Pass amount converting unit includes reference voltage source and voltage comparator, non-inverting input terminal and the voltage follow electricity of the voltage comparator
The output end on road connects, and the inverting input terminal of voltage comparator is connect with reference voltage source, the output end of voltage comparator with open
Measure output interface connection in pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820929376.4U CN208350571U (en) | 2018-06-15 | 2018-06-15 | A kind of front end data acquisition module of fugitive dust monitoring device |
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| CN201820929376.4U CN208350571U (en) | 2018-06-15 | 2018-06-15 | A kind of front end data acquisition module of fugitive dust monitoring device |
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| CN208350571U true CN208350571U (en) | 2019-01-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530766A (en) * | 2019-07-19 | 2019-12-03 | 武汉四方光电科技有限公司 | A kind of measuring concentration of granules in certain method and device |
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2018
- 2018-06-15 CN CN201820929376.4U patent/CN208350571U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530766A (en) * | 2019-07-19 | 2019-12-03 | 武汉四方光电科技有限公司 | A kind of measuring concentration of granules in certain method and device |
| CN110530766B (en) * | 2019-07-19 | 2020-07-17 | 四方光电股份有限公司 | Method and device for measuring concentration of particulate matter |
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