CN108344673A - Detection terminal and air quality detection system - Google Patents
Detection terminal and air quality detection system Download PDFInfo
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- CN108344673A CN108344673A CN201810259708.7A CN201810259708A CN108344673A CN 108344673 A CN108344673 A CN 108344673A CN 201810259708 A CN201810259708 A CN 201810259708A CN 108344673 A CN108344673 A CN 108344673A
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- 238000001514 detection method Methods 0.000 title claims abstract description 153
- 238000005070 sampling Methods 0.000 claims abstract description 39
- 238000004891 communication Methods 0.000 claims abstract description 25
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- 230000003287 optical effect Effects 0.000 claims abstract description 18
- 230000003321 amplification Effects 0.000 claims description 9
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 9
- 230000003189 isokinetic effect Effects 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 5
- 239000013618 particulate matter Substances 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000003993 interaction Effects 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
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- 238000007667 floating Methods 0.000 description 2
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- 241001269238 Data Species 0.000 description 1
- 239000012491 analyte Substances 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
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Abstract
The embodiment of the invention discloses a kind of detection terminal and air quality detection systems.The detection terminal includes laser sensor, detection circuit, microprocessor, communication module and air sampling rig；The air sampling rig is used to generate the sampling air flow of predetermined amount of flow；The laser sensor is used to detect the suspended particulate substance in the air-flow, forms corresponding optical signal；The detection circuit is used to the optical signal being converted to electric signal and export into the microprocessor；The communication module is connect with the microprocessor, for output data and receives instruction.Detection terminal has good performance, disclosure satisfy that the demand of user.Data interaction is abundant between monitor supervision platform and monitor terminal, quantity of suspended particulate substance and concentration etc. can clearly be showed by monitor supervision platform, has good application effect.
Description
Technical field
The present invention relates to detection device technical field more particularly to a kind of detection terminal and air quality detection systems.
Background technology
With the continuous improvement of people's living standards, the relevant Environmental Health parameter such as air quality starts gradually by people
The indexs such as attention, such as PM2.5 have been to be concerned by more and more people.In order to adapt to and meet people for air environment
It needs, is proposed now many relevant, detection terminal or detecting system for detecting air quality, people can facilitate
Pass through these detection terminals or detecting system, it is thus understood that current quality of air environment.
In realizing process of the present invention, inventor has found that the relevant technologies have the following problems：It is examined in current air environment
In survey, since the area of detection zone is sometimes larger, it is therefore desirable to realize function using distributed detecting system.It is existing
The connection type of some detection terminals is more single, can not there are corresponding defect, such as the transmission range of bluetooth module are shorter
Realize extensive arrangement etc. so that detection terminal can not meet the needs of detection well.
Invention content
In view of the above technical problems, an embodiment of the present invention provides a kind of detection terminal and air quality detection system, with
Solve the problem of that existing detection device has a single function the detection demand that cannot be satisfied in actual use.
The first aspect of the embodiment of the present invention provides a kind of detection terminal.The detection terminal includes：Laser sensor, inspection
Slowdown monitoring circuit, microprocessor, communication module and air sampling rig；
The air sampling rig is used to generate the sampling air flow of predetermined amount of flow；The laser sensor is described for detecting
Suspended particulate substance in air-flow forms corresponding optical signal；The detection circuit is used to the optical signal being converted to electric signal
And it exports into the microprocessor；The communication module is connect with the microprocessor, for output data and receives instruction.
Optionally, the air sampling rig includes the isokinetic sampling head and air pump being arranged in detection terminal front end；
The air pump is used to generate the sampling air flow of predetermined amount of flow, and the isokinetic sampling head is for keeping the sampling air flow and outside
The flow velocity of environment is identical.
Optionally, the flow of the air pump is 0.5L/min to 28.3L/min.
Optionally, the detection circuit includes pre-amplification circuit and multichannel discriminator circuit；The preposition amplification electricity
Road is used to the optical signal being converted to voltage signal, and the multichannel discriminator circuit is used for the width according to the voltage signal
Value calculates the particulate matter quantity in sampling air flow.
Optionally, the detection circuit further includes fault detection circuit, and the fault detection circuit is used to pass through the electricity
The average value of pressure signal judges whether the laser sensor work is normal.
Optionally, the communication module includes：WiFi module, cable network module, RS232 interface and RS485 interfaces.
Optionally, the detection terminal further includes：Temperature Humidity Sensor；The Temperature Humidity Sensor and the microprocessor
Connection, for detecting humiture information and feeding back in the microprocessor.
Optionally, the detection terminal further includes：GPS module；The GPS module is connect with the microprocessor, is used for
It determines the location information of the detection terminal and feeds back in the microprocessor.
Optionally, the detection terminal further includes：Radiating module；The radiating module is for being discharged the air pump described
The sampling air flow of detection terminal inside generation and the internal heat that the detection terminal is discharged.
The second aspect of the embodiment of the present invention provides a kind of air quality detection system.The air quality detection system packet
Include several detection terminals as described above and monitor supervision platform；The detection terminal is arranged in one or more different inspection
Location is set, and is established and is communicated to connect by communication module and the monitor supervision platform；The monitor supervision platform is connect by the communication connection
It receives the detection data that the detection terminal uploads and issues one or more control instruction.
In technical solution provided in an embodiment of the present invention, the detection of air quality is carried out using the principle of laser particle counter
And there is multiple functions module, the detection terminal provided has good performance, disclosure satisfy that the demand of user.Monitoring
Data interaction is abundant between platform and monitor terminal, can be clear by quantity of suspended particulate substance and concentration etc. by monitor supervision platform
Clear shows, and has good application effect.
Description of the drawings
Fig. 1 is one embodiment schematic diagram of the detection terminal of the embodiment of the present invention；
Fig. 2 is one embodiment schematic diagram of the air quality detection system of the embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, the every other implementation that those skilled in the art are obtained without creative efforts
Example, shall fall within the protection scope of the present invention.
It should be noted that when element is expressed " being fixed on " another element, it can directly on another element,
Or may exist one or more elements placed in the middle therebetween.When an element is expressed " connection " another element, it can be with
It is directly to another element or may exist one or more elements placed in the middle therebetween.Used in this specification
The orientation or position of the instructions such as term " vertically ", " horizontal ", "left", "right", "upper", "lower", "inner", "outside", " bottom "
Relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, without referring to
Show or imply that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore cannot manage
Solution is limitation of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as instruction or
Imply relative importance.
Unless otherwise defined, technical and scientific term all used in this specification is led with the technology for belonging to the present invention
The normally understood meaning of technical staff in domain is identical.Used term is only in the description of the invention in this specification
The purpose of description specific embodiment is not intended to limitation the utility model.Term "and/or" used in this specification
Include any and all combinations of one or more relevant Listed Items.In addition, invention described below is different
Involved technical characteristic can be combined with each other as long as they do not conflict with each other in embodiment.
Fig. 1 is the structure diagram of detection terminal provided in an embodiment of the present invention.In the present embodiment, which is based on
The principle of more particle diameter distribution formula laser particle counters carries out the detection of suspended particulate substance.Each detection terminal can be according to reality
The needs of border situation are laid in corresponding position to be used as sampled point, detect the air quality in the region of particular size.
As shown in Figure 1, the detection terminal may include laser sensor 11, detection circuit 12, microprocessor 13, communication
Module 14 and air sampling rig 16.
Above-mentioned function module can be housed in a shell or box body.The shell or box body specifically can be with
It is made of any shape or material, the shell as detection terminal.It is also provided with and is used for inside the detection terminal
For the gas passage that sample gas flows through, the principle of laser detection is realized.
The air sampling rig 16 is a gas generating unit for generating sampling air flow.It is as detection terminal
Gas dynamic system, be the basis for carrying out air sampling to be detected.
In some embodiments, as shown in Figure 1, the air sampling rig 16 can be by being arranged in detection terminal front end
Isokinetic sampling head 161 and air pump 162 form.
Wherein, the air pump 162 is used to generate the sampling air flow of predetermined amount of flow, the sample as detection.In some implementations
In example, the flow that the air pump generates can control between the range of 0.5L/min to 28.3L/min according to actual needs.
The isokinetic sampling head 161 is a kind of specific sampling apparatus, be mainly used for keeping the sampling air flow with
The flow velocity of external environment is identical.Isokinetic sampling head 161 be mainly used in dust-free workshop, ultra-clean laboratory etc. some for clean
The more demanding position of cleanliness ensures that the sampling air flow for entering detection terminal is equal with the flow velocity in external area to be tested,
The case where there is no air-breathing or losses, it is ensured that detection precision.
The laser sensor 11 is used to detect the suspended particulate substance in the air-flow, forms corresponding optical signal.This swashs
Optical sensor is optical signal generating apparatus, and particle analyte detection is carried out for the sampling air flow into detection terminal.
The specific operation principle of laser sensor is realized based on mie scattering principles, the suspended particulate substance of different-diameter
It will produce the different optical signal of intensity.The optical signal that the bigger suspended particulate substance of diameter generates is stronger.
The detection circuit 12 is the signaling conversion circuit in detection terminal, for the optical signal to be converted to electric signal
And it exports into the microprocessor.The detection circuit 12 can by the optical signal conversion microprocessor that laser sensor 11 generates
The electric signal of processing.
In some embodiments, as shown in Figure 1, the detection circuit 12 may include pre-amplification circuit 121 and more
Channel discriminator circuit 122.
The pre-amplification circuit 121 is an amplifying circuit based on photoelectric tube.The light letter that laser sensor 11 generates
It number is irradiated in photoelectric tube to be converted to electric signal and be amplified circuit and be amplified and/or filtering operation, to believe the light
Number being converted to being capable of processed voltage signal.
The multichannel discriminator circuit 122 is used for the amplitude according to the voltage signal, calculates the particle in sampling air flow
Object quantity.As described above, there are correlativities between the diameter of suspended particulate substance and the light signal strength of generation, it is different
Suspended particulate substance corresponds to the voltage signal of different amplitudes.
Therefore, multichannel discriminator circuit 122 can be according to the amplitude of voltage signal, to the suspended particulate substance in sampled air
Quantity is distinguished and is counted.Also that is, the multichannel discriminator circuit 122 can successively be counted according to voltage signal magnitude size
Calculate the suspended particulate substance quantity of the different-grain diameters such as 0.3um, 0.5um, 0.7um, 1um, 2.5um, 5um, 10um, 100um.
For example, detecting in 1 minute, 30mv or more voltage signal magnitude quantity has 10000, that is, indicates at this 1 minute
In, 0.3um or more suspended particulate substance quantity is 10000.
In some embodiments, the detection circuit 12 can also include fault detection circuit 123.The fault detect electricity
Road 123 is used to judge by the average value of the voltage signal whether the laser sensor works normal.Fault detection circuit
123 can be any kind of, can carry out the detection circuit of voltage comparison, with conversion obtain voltage signal it is whether excessive or
It is too small come determine detection terminal whether be in normal operation state.
The microprocessor 13 is the processing core of entire detection terminal, can acquire and record various types of number
According to, and according to the control instruction of user, realize the control to each function module.The microprocessor 13 specifically may be used any
Type, it disclosure satisfy that requirement on control chip or core capabilities with logical operation capability.
In actual moving process, microprocessor can go out detection circuit the data obtained, the flow rate conversion based on air pump
The number concentration of floating particles object during current environment is outstanding.According to gained suspended particulate substance number concentration, indicated respectively with not commensurate
(such as a/every liter, it is a/every cubic metre etc.).Mass concentration is finally converted into according to suspended particulate substance number concentration.
The communication module 14 is connect with the microprocessor 13, as the hardware foundation of detection terminal and PERCOM peripheral communication,
For output data and instruction is received, realizes the distributed setting of detection terminal.The communication module 14 can be any types
, the function module of two-way communication link can be established.The communication module 14 can also use a variety of differences according to actual needs
Communication module 14.
It is preferred that the communication module 14 may include WiFi module 141, cable network module 142, RS232 interface
143 and RS485 interfaces 144.These different communication modules 14 can make detection terminal customized and monitoring platform or
Mutual connection type, so that the overall range that distributed detection terminal is able to detect that has good stretch
Property (changeable), the detection terminal quantity that can be connected are also unrestricted.
In further embodiments, which can also increase according to the needs of actual conditions or letter saves
Function module or hardware function units meet the needs of users to the function of abundant detection terminal.
Please continue to refer to Fig. 1, the detection terminal can also include the Temperature Humidity Sensor being connect with the microprocessor
17.The Temperature Humidity Sensor 17 can be any sensor for detecting humiture information, be arranged in the outer of detection terminal
Side is used to detect the temperature and humidity of environment.
The temperature and humidity data that the acquisition of Temperature Humidity Sensor 17 obtains can be fed back in the microprocessor, to
So that detection terminal has Temperature and Humidity function.
Specifically, in order to meet the needs detected on a large scale, the detection terminal can also include GPS module 18.It is described
GPS module 18 is connect with the microprocessor, by way of GPS positioning, determines the location information of the detection terminal and anti-
It is fed in the microprocessor, it is ensured that in a distributed system, user, which fast and accurately can determine and differentiate, is in different positions
The detection terminal set.
In some embodiments, being easy tod produce and accumulated influence sensor in internal work due to detection terminal normally makes
Heat.Therefore, which can also add radiating module 19.
The radiating module 19 can be any kind of heat-transfer device, for the air pump to be discharged in the detection terminal
The internal heat of the detection terminal is discharged while the sampling air flow that inside generates together, keeps detection terminal that can continue surely
Fixed work.
Fig. 2 is air quality detection system provided in an embodiment of the present invention.As shown in Fig. 2, the Detection of Air Quality
System is a distributed system, includes mainly several detection terminals 10 as described above and monitor supervision platform 20.
The detection terminal 10 according to actual needs, is arranged in one or more different test position, realizes
Detection for the air quality of each isolated area.Each between detection terminal 10 and monitoring platform by communication module with
The monitor supervision platform establishes communication connection.
By the communication connection, the monitor supervision platform can receive the detection data that the detection terminal uploads and to detection
Terminal issues one or more control instruction.The monitor supervision platform specifically can be in the form of the ends PC software or cell phone application etc.
It realizes.User can run these softwares or APP by terminal device, control detection terminal working condition, for example, control inspection
Survey the time that terminal detects a data, assay intervals, if detect within round-the-clock 24 hours, alarm mechanism etc..
In some embodiments, monitoring platform can also analyze current or history the data in certain region,
For example, draw some detection terminal detection data historical data curve graph (including detection terminal measure per hour in 7 days it is outstanding
The particulate matter quality concentration of floating particles object, 0.3um or more grain sizes) or certain position range in more detection terminal time datas
The concentration space distribution map etc. at more detection terminal moment within the scope of bar chart, specific position.
Further, monitoring platform current or history data can also analyze simultaneously certain place in certain region
Set numerical upper limits warning function, such as basis《The cleaniliness classs that U.S. federal standard Fed-Std-209E is formulated》Or
《The toilets (ISO14644) GB50073-2001 and clean area airblrne particulates cleaniliness classs》Alert threshold is set, when
Beyond when trigger automatic alarm, realize and a comprehensive prison made to the suspended particulate substance quality concentration and quantity in some region
It surveys.
In actual mechanical process, monitor supervision platform 20 is logical by wifi module, wired network module, RS232, RS485 etc.
Letter mode issues the control instruction of detection data to detection terminal.Detection terminal is started to work after receiving control instruction, and will
Data storage after detection.Then, monitor supervision platform retransmits control instruction to detection terminal, makes detection terminal passback detection
The data of acquisition complete the testing process of complete air quality.
In the above-described embodiments, monitor supervision platform can obtain, and the data from detection terminal include：PM2.5, PM10,
TSP particulate matter quality concentration, 0.3um, 0.5um, 0.7um, 1.0um, 2.0um, 2.5um, 5.0um, 10um, 100um diameter
Particulate matter number concentration, time of measuring measure duration, pendulous frequency, humiture when measurement, detection terminal location information, inspection
Survey the flow etc. of terminal number and air pump.
Below in conjunction with the structure diagram of detection terminal shown in FIG. 1, the detailed course of work for describing the detection terminal：
When receiving the control instruction of monitor supervision platform, detection terminal is started to work.Certain air-flow is generated by air pump,
Make the gas in environment as sample gas, passes through isokinetic sampling head, laser sensor and air pump successively.
Suspended particulate substance in the air-flow that laser sensor detection is passed through, generates corresponding optical signal.Optical signal is radiated at
On the photoelectric tube of pre-amplification circuit, obtained optical signal is converted to electric signal by pre-amplification circuit.
In addition, failure checking circuit checks the voltage signal of conversion, obtained voltage signal is fed back into micro- place
Manage device, if voltage is undesirable, microprocessor by wifi module, cable network module, RS232 interface, RS485 interfaces,
Detection platform prompt detection terminal is fed back to break down.If meeting the requirements, by multichannel discriminator circuit to preposition amplification
Circuit voltage signal is screened, according to voltage signal magnitude size, calculate according to this 0.3um, 0.5um, 0.7um, 1um,
The suspended particulate substance quantity of the different-grain diameters such as 2.5um, 5um, 10um, 100um.
Microprocessor carries out corresponding logical process after receiving the data measured by multichannel discriminator circuit, calculates
The mass concentration of PM2.5, PM10, TSP.It, can be with while detection terminal detects suspended particulate substance quality and quantity concentration
Environment temperature and humidity are detected by Temperature Humidity Sensor, physical location is detected by GPS module.Finally, microprocessor receives
Above-mentioned PM2.5, PM10, mass concentration, environment temperature and the humidity and physical location of TSP and be written into reservoir or
Monitor supervision platform 20 is directly uploaded to according to control instruction.
In conclusion detection terminal provided in an embodiment of the present invention is abundant with monitor supervision platform connection type, including wifi moulds
Block, cable network module, RS232 interface that is, RS485 interfaces.Wherein, RS232 interface and RS485 interfaces can customizeds
The connection type of detection terminal and monitoring platform, so that the regional extent of Distributed Detection is changeable, detection terminal number
It measures unrestricted.
Monitor supervision platform can be made to know the monitoring position of detection terminal additionally by GPS module so that detection terminal is being examined
Position movement can occur during survey.The radiating module of additional can ensure that detection terminal internal temperature will not excessively high shadow
Ring the accuracy of Temperature Humidity Sensor.
It, can according to the technique and scheme of the present invention and this hair it is understood that for those of ordinary skills
Bright design is subject to equivalent substitution or change, and all these changes or replacement should all belong to the guarantor of appended claims of the invention
Protect range.
Claims (10)
1. a kind of detection terminal, which is characterized in that including：Laser sensor, detection circuit, microprocessor, communication module and
Air sampling rig；
The air sampling rig is used to generate the sampling air flow of predetermined amount of flow；The laser sensor is for detecting the air-flow
Interior suspended particulate substance forms corresponding optical signal；
The detection circuit is used to the optical signal being converted to electric signal and export into the microprocessor；The communication mould
Block is connect with the microprocessor, for output data and receives instruction.
2. detection terminal according to claim 1, which is characterized in that the air sampling rig includes that setting is whole in detection
Hold the isokinetic sampling head and air pump of front end；
The air pump is used to generate the sampling air flow of predetermined amount of flow, the isokinetic sampling head for keep the sampling air flow with
The flow velocity of external environment is identical.
3. detection terminal according to claim 2, which is characterized in that the flow of the air pump is 0.5L/min to 28.3L/
min。
4. detection terminal according to claim 1, which is characterized in that the detection circuit include pre-amplification circuit and
Multichannel discriminator circuit；
The pre-amplification circuit is used to the optical signal being converted to voltage signal, and the multichannel discriminator circuit is used for basis
The amplitude of the voltage signal calculates the particulate matter quantity in sampling air flow.
5. detection terminal according to claim 4, which is characterized in that the detection circuit further includes fault detection circuit,
The fault detection circuit is used to judge by the average value of the voltage signal whether the laser sensor works normal.
6. detection terminal according to claim 1, which is characterized in that the communication module includes：WiFi module, wired network
Network module, RS232 interface and RS485 interfaces.
7. according to any detection terminals of claim 1-6, which is characterized in that the detection terminal further includes：Humiture
Sensor；
The Temperature Humidity Sensor is connect with the microprocessor, for detecting humiture information and feeding back to the microprocessor
In.
8. according to any detection terminals of claim 1-6, which is characterized in that the detection terminal further includes：GPS moulds
Block；
The GPS module is connect with the microprocessor, and the location information for determining the detection terminal is simultaneously fed back to described
In microprocessor.
9. according to any detection terminals of claim 1-6, which is characterized in that the detection terminal further includes：Radiating mould
Block；
The radiating module is used to be discharged the sampling air flow that the air pump generates inside the detection terminal and the inspection is discharged
Survey the internal heat of terminal.
10. a kind of air quality detection system, which is characterized in that include several detections as described in claim 1-9 is any
Terminal and monitor supervision platform；
The detection terminal is arranged in one or more different test position, is built by communication module and the monitor supervision platform
Vertical communication connection；
The monitor supervision platform by the communication connection, receive the detection data that the detection terminal uploads and issue one or
Multiple control instructions.
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| CN201810259708.7A CN108344673A (en) | 2018-03-27 | 2018-03-27 | Detection terminal and air quality detection system |
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