CN113109506A - Multi-point position acquisition monitoring system for multiple gas pollutants - Google Patents

Multi-point position acquisition monitoring system for multiple gas pollutants Download PDF

Info

Publication number
CN113109506A
CN113109506A CN202110200681.6A CN202110200681A CN113109506A CN 113109506 A CN113109506 A CN 113109506A CN 202110200681 A CN202110200681 A CN 202110200681A CN 113109506 A CN113109506 A CN 113109506A
Authority
CN
China
Prior art keywords
gas
air
cabinet
box
sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110200681.6A
Other languages
Chinese (zh)
Inventor
张克强
杨增军
翟中葳
沈丰菊
赵润
梁军锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Agro Environmental Protection Institute Ministry of Agriculture
Agro Environmental Protection Institute Ministry of Agriculture and Rural Affairs
Original Assignee
Agro Environmental Protection Institute Ministry of Agriculture
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Agro Environmental Protection Institute Ministry of Agriculture filed Critical Agro Environmental Protection Institute Ministry of Agriculture
Priority to CN202110200681.6A priority Critical patent/CN113109506A/en
Publication of CN113109506A publication Critical patent/CN113109506A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/24—Suction devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/34—Purifying; Cleaning
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
    • G01N33/0037—NOx
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
    • G01N33/004—CO or CO2
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
    • G01N33/0044—Sulphides, e.g. H2S
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
    • G01N33/0054—Ammonia
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • G05B19/054—Input/output

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Immunology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Dispersion Chemistry (AREA)
  • Automation & Control Theory (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention belongs to the technical field of data acquisition, and relates to a gas acquisition device, in particular to a multi-point position acquisition system for various gas pollutants. The device comprises a multipoint sampling box and a gas pollutant collecting cabinet, wherein a plurality of box body gas inlets and a box body gas outlet are arranged in the multipoint sampling box, and one of the box body gas inlets is communicated with the box body gas outlet; the utility model discloses a gas pollutant collection cabinet, including the gas pollutant collection cabinet, the gas pollutant is gathered the lateral wall of cabinet and is installed cabinet body air inlet and cabinet body gas outlet, install in this gas pollutant collection cabinet sensor suction-type air chamber, including a plurality of sensors in the sensor suction-type air chamber, every sensor all is used for gathering different gas pollutant concentrations, still install vacuum pump and pneumatic valve in pressure transmitter and the mass flowmeter this gas flow pipeline in the gas flow pipeline of cabinet body air inlet warp sensor suction-type air chamber to the cabinet body gas outlet respectively, the box gas outlet of multiple spot sampling case and the cabinet body air inlet of gas pollutant collection cabinet switch on.

Description

Multi-point position acquisition monitoring system for multiple gas pollutants
Technical Field
The invention belongs to the technical field of data acquisition, and relates to a gas acquisition device, in particular to a multi-point position acquisition system for various gas pollutants.
Background
The method aims at the detection of gas related parameters, and is widely applied to the fields of medical treatment, building, environmental protection, petrifaction, cultivation and the like, particularly the fields of living houses, public environments, livestock cultivation and the like, which have common requirements on the detection of gas pollutants.
Taking livestock breeding as an example, the quality of the internal air environment of livestock can seriously affect the health and safety of livestock breeding because of the fermentation of livestock excrement and the relatively closed breeding environment. Therefore, it is necessary to effectively monitor various gaseous pollutants such as methane, ammonia, hydrogen sulfide, nitrous oxide, carbon monoxide and carbon dioxide in the interior thereof.
With the development of the internet of things and intelligent control technology, the existing livestock breeding mode gradually abandons workshop-type or household-type breeding mode, and then becomes a large-scale, large-scale and intelligent breeding mode. With the innovation of the breeding mode, the number of the breeding heads and the occupied space of the breeding heads are increased, and further, new problems are caused. At present, the gas collecting device for livestock breeding is not obviously reformed, a corresponding gas collecting device needs to be arranged at each detection point, and a single gas collecting device is taken as an example, so that equipment such as a gas pump, a sensor, a flow detector and the like is generally needed. The larger the culture scale is, the more the point locations need to be arranged, and if the existing gas collecting device is continuously adopted, the cost is high, the arrangement difficulty is high, and the ordered monitoring and control are not facilitated. If multiple gases are collected, the cost and difficulty increase by geometric factors.
Therefore, a new collection system is designed based on new design requirements to solve the collection problem of multiple-point and multiple gas pollutants.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the multi-point acquisition system for the multiple gas pollutants, which has a reasonable structure, is convenient to arrange at multiple points, is suitable for environments with lower gas concentration aiming at the multiple gas pollutants, and has good sealing property and long service life.
The technical scheme adopted by the invention is as follows:
multiple gas pollutant is with multiple spot position collection system, its characterized in that: the multi-point sampling box is internally provided with a plurality of box body air inlets and a box body air outlet, the plurality of air inlets are uniformly connected with the air outlet, and one of the plurality of box body air inlets is communicated with the box body air outlet in a use state; a cabinet body air inlet and a cabinet body air outlet are arranged on the side wall of the gas pollutant collecting cabinet, the sensor suction type air chamber is arranged in the gas pollutant collecting cabinet, a plurality of sensors are arranged in the sensor suction type air chamber, each sensor is used for collecting different gas pollutant concentrations, and a pressure transmitter and a mass flow meter are respectively arranged in an airflow pipeline from the cabinet body air inlet to the cabinet body air outlet through the sensor suction type air chamber; in order to adjust the pressure, flow and flow rate of the air flow in the air flow pipeline, a vacuum pump and an air valve are further installed in the air flow pipeline, and the air outlet of the box body of the multipoint sampling box is communicated with the air inlet of the cabinet body of the gas pollutant collecting cabinet.
Furthermore, the multipoint sampling box is provided with an air flow monitoring device and an air pump in each pipeline between the box body air inlet and the box body air outlet.
Furthermore, each box body air inlet of the multipoint sampling box is communicated with an air inlet end of one air collecting pipe, and an air outlet end of the air collecting pipe is communicated with an air outlet of the box body.
Furthermore, a plurality of air valves are installed in the box body, and each air valve is arranged at a position between the air inlet of the box body and the air collecting pipe and used for controlling the conduction and the closing of the corresponding air inlet.
Furthermore, the air valve of the multi-point sampling box adopts an electronic air valve, a central control device is installed in the box body, the central control device adopts a PLC, the PLC can output control signals to the electronic air valve, and the electronic air valve converts the input control signals into voltage signals to adjust the opening degree of the electronic air valve.
Furthermore, a dust concentration sensor and a dehumidification tank are arranged between the sensor suction type air chamber and the air inlet of the cabinet body in the gas pollutant collection cabinet.
Furthermore, an acquisition card is installed in the gas pollutant acquisition cabinet and connected with the signal output ends of the sensors, and the signal output end of the acquisition card is connected with an upper computer.
Furthermore, a temperature and humidity sensor and an air speed sensor are respectively arranged in the gas pollutant collecting cabinet.
Furthermore, the mass flow meter and the vacuum pump are sequentially installed between the gas outlet side of the sensor suction type gas chamber in the gas pollutant collecting cabinet and the gas outlet of the cabinet body.
Furthermore, the sensor suction-type air chamber comprises a plurality of collecting boxes, each collecting box is internally provided with a cavity, an air inlet and an air outlet are arranged in the outer wall of each cavity, the collecting boxes are sequentially communicated to enable the cavity of each collecting box to jointly form an air guide cavity, the pressure transmitter is arranged in the air guide cavity, and the air guide cavity of the sensor suction-type air chamber and the inner space of the sealing cabinet are mutually isolated.
The invention has the advantages and positive effects that:
in the invention, a multipoint sampling box and a gas pollutant collecting cabinet are matched to form a set of multipoint position collecting system capable of respectively collecting various gas pollutants. Wherein, the problem of the degree of difficulty is simply laid to the multiple sampling case is used for solving, and gaseous pollutant gathers the cabinet and then is applied to in the testing process to multiple gaseous pollutant. Take the example of 20 collection points that need to be deployed, each collection point needing to collect 6 gas contaminants. The existing collection terminal is distributed by 120 sets, and the system used by the invention only needs one sampling box, one gas pollutant collection cabinet and external pipelines with corresponding adaptive lengths. Compared with the structure of the original 120 acquisition terminals, the cost and the installation difficulty are basically ignored, and further, the complexity of the acquisition process and the control process of the data is reduced in magnitude.
In the invention, the box body air inlet of the multipoint collection box can be extended and arranged at each site to be monitored through the hose, and the gas collected by the box body air inlet is finally led into the gas pollutant collection cabinet, thereby realizing the independent collection of the gas at each site.
In the invention, the gas collecting pipe is used as the extension of the gas outlet of the box body, so that the axial length of the gas outlet of the box body is prolonged, and the pipelines of different box body gas inlets are conveniently connected and communicated with the gas outlet of the box body, namely, the length of the pipeline is reduced, so that the pipeline connection is convenient. The gas flow monitoring device and the air pump are matched to ensure that the gas flow flowing out of the gas outlet of the box body meets the requirement of a follow-up gas pollutant collecting cabinet, and the gas flow and the flow speed are effectively prevented from being too high or too low. The gas valve is adopted to control the on and off of the gas inlet and the gas collecting pipe, so that the use personnel can conveniently carry out remote or automatic control, and the PLC is adopted as a central control device to control each electronic gas valve.
In the invention, a plurality of sensors are integrated in the gas pollutant collecting cabinet, wherein the design concept of the plurality of sensors is already applied to some gas collecting devices, but the pressure transmitter and the mass flowmeter connected with the sensors can compensate the collected low-concentration gas, and the matching of the vacuum pump and the gas valve can be controlled and adjusted on the air inflow and the flow rate. The method is a method for effectively improving the acquisition precision in the air environment with low gas concentration and space occlusion such as livestock breeding.
In the invention, an acquisition card is used as an acquisition terminal of each sensor to collect information acquired by each sensor. The wind speed sensor and the temperature and humidity sensor are used for reflecting relevant environments of the collection state, so that corresponding collection conditions can be designed, and the wind speed sensor and the temperature and humidity sensor can also be matched with subsequent data processing work to serve as compensation conditions in data calculation.
According to the invention, the dust concentration sensor and the dehumidification tank which are arranged at the front end of the sensor suction type air chamber are used for carrying out dust concentration detection and dehumidification treatment on the gas entering the acquisition device, so that the influence of the external environment on the subsequent sensor suction type air chamber is reduced, and the detection accuracy is further improved.
In the invention, the suction-type air chamber of the sensor structurally adopts the matching of the collection boxes and the sensor, and the collection boxes are sequentially and tightly installed, so that the occupied space is small, and the detection environment is more closed. Such design can prevent that low concentration gas from taking place the diffusion in the detection position, can keep apart with all the other electric original paper in the sealed cabinet again, effectively prevents the corruption of gaseous pollutant to electric original paper, hoisting device's stability and life.
Drawings
FIG. 1 is a schematic view of a multi-point sampling chamber according to the present invention;
FIG. 2 is a schematic view of the left-hand rotation of FIG. 1;
FIG. 3 is a schematic view of the structure of the gas pollutant collecting cabinet of the present invention;
FIG. 4 is a schematic structural diagram of a positive layout of a PBC circuit design of the NH3 sensor;
FIG. 5 is a schematic structural diagram of a PBC circuit design back panel of the NH3 sensor;
figure 6 is a schematic diagram of the NH3 sensor PBC circuit design incorporating printed circuitry;
FIG. 7 is a schematic structural diagram of a PBC circuit design front panel of the CO2 sensor;
FIG. 8 is a schematic structural diagram of a PBC circuit design back layout of a CO2 sensor;
figure 9 is a schematic diagram of the structure of a CO2 sensor PBC circuit design incorporating printed circuits;
FIG. 10 is a schematic view of the structure of the suction chamber portion of the sensor of the present invention.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
The invention relates to a multi-point position acquisition system for multiple gas pollutants, which is characterized by comprising a multi-point sampling box and a gas pollutant acquisition cabinet, wherein a plurality of box body gas inlets 2 and a box body gas outlet are arranged in the multi-point sampling box, the plurality of box body gas inlets are uniformly connected with one gas outlet, and one of the plurality of box body gas inlets is communicated with the box body gas outlet in a use state; a cabinet body air inlet 18 and a cabinet body air outlet 27 are mounted on the side wall of the gas pollutant collecting cabinet, the sensor suction type air chamber 21 is mounted in the gas pollutant collecting cabinet, a plurality of sensors are arranged in the sensor suction type air chamber, each sensor is used for collecting different gas pollutant concentrations, and a pressure transmitter 20 and a mass flow meter 23 are respectively mounted in an airflow pipeline from the cabinet body air inlet to the cabinet body air outlet through the sensor suction type air chamber; in order to adjust the pressure, flow and flow rate of the air flow in the air flow pipeline, a vacuum pump and an air valve are further installed in the air flow pipeline, and the air outlet of the box body of the multipoint sampling box is communicated with the air inlet of the cabinet body of the gas pollutant collecting cabinet.
In this embodiment, each of the box air inlets is communicated with an air inlet end of a gas collecting pipe through a pipeline, and an air outlet end of the gas collecting pipe is communicated with an air outlet.
In this embodiment, a gas flow monitoring device is installed in each pipeline between the gas inlet of the box body and the gas outlet of the box body.
In this embodiment, each air pump is installed in a pipeline between the air inlet of the tank body and the air outlet of the tank body, and is used for adjusting the periphery of the air inlet to a negative pressure environment and guiding the air outlet out.
In this embodiment, install a plurality of pneumatic valves in the box, every pneumatic valve all sets up the position between box air inlet and gas collecting pipe for the switching on and closing of corresponding box air inlet of control, the pneumatic valve of installation in the box adopts the electron pneumatic valve, and accuse device adopts PLC in the installation in the box, and this PLC can be to the output control signal of electron pneumatic valve, and the electron pneumatic valve turns into the aperture that voltage signal adjusted self with the control signal of input.
In this embodiment, the sensor in the gas pollutant collecting cabinet can be replaced according to the type of the gas pollutant to be collected.
In this embodiment, an acquisition card is installed in the gas pollutant acquisition cabinet, and is connected to signal output terminals of the plurality of sensors, and the signal output terminal of the acquisition card is connected to the upper computer.
In this embodiment, a temperature and humidity sensor 15 and an air speed sensor 16 are further respectively installed in the gas pollutant collecting cabinet.
In this embodiment, a dust concentration sensor 17 and a dehumidification tank 19 are installed between the suction-type sensor air chamber and the air inlet of the collection device.
In this embodiment, the mass flow meter 23 and the vacuum pump 25 are sequentially installed between the outlet side of the suction-type gas chamber of the sensor and the outlet of the collection device.
In this embodiment, sensor suction-type air chamber includes a plurality of collection boxes, and every collection box is the built-in cavity all, and the outer wall position of cavity is provided with inlet port and venthole, and each collection box communicates in order and makes the cavity of every collection box form an air guide cavity jointly, installs in this air guide cavity pressure transmitter.
In this embodiment, the collection box is a hollow cubic box structure, the distance between two opposite inner walls of one side of the air inlet hole is preferably greater than the distance between two opposite inner walls of the air outlet hole, and a smooth slope is formed at the transition position between the two inner walls to reduce disturbance to the air.
In this embodiment, the mounting base is a sealed cabinet, the side wall of the sealed cabinet is provided with the cabinet air inlet and the cabinet air outlet, the sealed cabinet is internally provided with the sensor suction type air chamber, and the air guide chamber of the sensor suction type air chamber is isolated from the inner space of the sealed cabinet.
In this embodiment, the sealing cabinet adopts a hinge structure with an opening at one side, a cabinet door 13 is hinged at the opening position, and sealing strips are arranged at the same side position of the outer edge of the cabinet door and the opening.
In this embodiment, install cabinet body PLC24 and converter 22 in the sealed cabinet, the host computer can adopt PLC, also can be through outside controlgear and the controlling means of thing internet connection through the converter, the system has one in the cabinet door and inlays the mouth, inlays and installs cabinet body display screen 14 in the mouth, acquisition card and PLC adopt R485 to communicate, PLC and display screen communicate through HYA 22.
In this embodiment, the type of the sensor is, the type of the pressure transmitter is, the type of the mass flowmeter is, the type of the vacuum pump is, the type of the air valve is, PLC and display screen adopt respectively.
Examples of applications of the above embodiments are as follows:
taking the field of application in this embodiment as an example, the multiple spot sampling case includes front panel 6, back panel 1 and inner space, install PLC7 in the front panel, PLC includes the display screen subassembly, and the side position that is located the display screen subassembly is provided with power jack, external interface (like the USB interface), switch and box gas outlet 8. Twenty box air inlets 2 are installed in the rear panel, each box air inlet is arranged at intervals, the distance between the box air inlets is suitable for installation without influencing external hoses, and if the number of the air inlets is large, the box air inlets can be distributed in two rows or multiple rows as shown in figure 1. In the inner space of the multipoint sampling box, two side clapboards 10 are arranged by adopting a frame, a corresponding gas collecting pipe 5 is arranged in the upper end face of each clapboard, and corresponding electronic gas valves (comprising a control end and an execution end) and pipelines 4 are arranged on two sides of the gas collecting pipe. The gas collecting pipes arranged in the two layers of clapboards are arranged at intervals up and down, one side end of each gas collecting pipe is communicated integrally, and the other side (namely the gas outlet end) of each gas collecting pipe is communicated with the gas outlet. The air pump 12 and the gas flow monitoring device 11 are sequentially arranged in a pipeline between the gas collecting pipe and the gas outlet in a penetrating way.
The gas pollutant collecting cabinet comprises six sensors, and can collect methane, ammonia gas, hydrogen sulfide, nitrous oxide, carbon monoxide and carbon dioxide respectively. Besides the harmful gas pollutants, the collecting device can also be applied to collecting harmless gases such as oxygen and the like.
In this embodiment, an NH3 electrochemical sensor is used for monitoring NH3 in the sensor, and a sensor of 4NH3-100 model by honeywell international corporation is used for the sensor. The signal output three-electrode of the 4NH3-100 type sensor is directly connected with an electrochemical reaction system, any additional electric energy processing technology influences the detection accuracy of the reaction system, and therefore corresponding circuit design needs to be carried out, Protel 99SE circuit design software is adopted to develop a corresponding three-electrode socket plate, a brass gold-plated socket is welded at the connecting position of a pin of the sensor, a grab spring is arranged in the brass-plated socket, and effective fixation and detection signal change caused by aging are guaranteed and prevented. In order to ensure stable signal transmission and air tightness of a limited area, a 4-layer plate with the thickness of 3mm is selected and consists of a surface layer, a power supply layer, a ground layer and a bottom layer, pin sockets and H2.54 sockets are welded on the surface layer and the bottom layer, and the power supply layer and the ground layer are used for separating circuits. The method is based on each circuit module, a PCB signal processing board is independently developed, a component library of a schematic diagram is drawn, an integrated component library of the PCB is generated, the component layout of the PCB is carried out by using the integrated component library, and routing and layout are designed according to a network diagram with electrical properties generated by the schematic diagram, as shown in figures 4-6.
In the embodiment, a CO2 sensor based on a non-dispersive infrared spectrum detection principle is adopted for monitoring CO2, and the model is a TDS0036 type CO2 sensor developed by Dynament Limited in UK. The MSH-P-CO2 type sensor is a five-electrode sensor, wherein an output electrode can be directly matched with a zero electrode to acquire a voltage signal, a digital signal input/output electrode can directly analyze digital quantity according to a communication protocol, a signal processing board is more stable relative to an electrochemical sensor for outputting micro-current, a voltage supply module is only required to be arranged on a lead connected with a PCB socket, and a PCB signal processing board design circuit is shown in figures 7-9.
In this embodiment, for realizing the normal position monitoring of multicomponent main pollutant, at first protect the sensor probe under the prerequisite of effective detection gas composition, prevent that impurity such as dust from blockking up the pellicle on sensor surface, and can realize effective demarcation and cleanness of detection sensor, for this reason, sensor suction type air chamber structure has been developed, overall structure prints one shot forming by 3D, it is high strength nylon to print the material, NH3 and CO2 sensor are through independently designing the PCB socket, with silica gel sealing washer and air chamber encapsulation, wait to examine gaseous by import quick connector entering air chamber, discharge by export quick connector, realize that the air current passes through the concentration detection of cavity process, for better observation internal conditions, this model adopts translucent resin material to print.
The airflow channel of the completed air chamber assembly is arranged under the air chamber model, the bottom of the airflow channel has a slope of 8 degrees just facing the gas absorption surface of the sensor, so that upward flow is formed, and the speed of enabling the component to be detected to enter the detection chamber of the sensor by means of the diffusion principle is increased. The two sensors which are relatively independent are connected by a reduction channel, so that the disturbance of the airflow is reduced.
The using process of the invention is as follows:
when the multi-point sampling box is used, a hose needs to be installed at each box body air inlet of the multi-point sampling box, one end of the hose (which can be any pipeline capable of being communicated with the box body air inlet) is hermetically connected with any box body air inlet when the hose is installed, and the other end of the hose is arranged at a point position opening to be detected. The air outlet is communicated with the air inlet end of the gas detection device through a pipeline.
When gas detection needs to be carried out on a certain point, an operator outputs a control command to the control end 2 of a certain electronic gas valve by adopting the PLC, the control end of the electronic gas valve outputs corresponding voltage according to a control signal, then the execution end 9 of the electronic gas valve is switched on, meanwhile, the air pump starts to suck air, and the flow monitoring device detects the gas flow passing through the gas outlet in real time and conveys the gas flow to the gas inlet of the cabinet body of the gas pollutant collecting cabinet.
The PLC of the cabinet body can adjust the opening and closing position and the opening angle of the air valve, under the action of the vacuum pump, gas output by the multipoint sampling box is sucked by an air inlet of the cabinet body, and firstly, the dust concentration is collected and the dehumidification is carried out; then the gas enters each collecting box in sequence, and meanwhile, the vacuum pump and the mass flow meter detect and adjust the input gas flow and flow rate. After the air flows through the sensors in each acquisition box for detection, the air is discharged from the air outlet of the cabinet body, and the sensors output acquired signals into the acquisition cards. The acquisition card converts and transmits the signals, the signals can be respectively transmitted to the cabinet body PLC and other external upper computers according to requirements, and the display screen can display the acquired gas concentration and other parameters in real time.
And after the point location acquisition is finished, repeating the steps to acquire the next point location until all the point locations needing to be acquired are finished.
In the invention, a multipoint sampling box and a gas pollutant collecting cabinet are matched to form a set of multipoint position collecting system capable of respectively collecting various gas pollutants. Wherein, the problem of the degree of difficulty is simply laid to the multiple sampling case is used for solving, and gaseous pollutant gathers the cabinet and then is applied to in the testing process to multiple gaseous pollutant. Take the example of 20 collection points that need to be deployed, each collection point needing to collect 6 gas contaminants. The existing collection terminal is distributed by 120 sets, and the system used by the invention only needs one sampling box, one gas pollutant collection cabinet and external pipelines with corresponding adaptive lengths. Compared with the structure of the original 120 acquisition terminals, the cost and the installation difficulty are basically ignored, and further, the complexity of the acquisition process and the control process of the data is reduced in magnitude.
In the invention, the box body air inlet of the multipoint collection box can be extended and arranged at each site to be monitored through the hose, and the gas collected by the box body air inlet is finally led into the gas pollutant collection cabinet, thereby realizing the independent collection of the gas at each site.
In the invention, the gas collecting pipe is used as the extension of the gas outlet of the box body, so that the axial length of the gas outlet of the box body is prolonged, and the pipelines of different box body gas inlets are conveniently connected and communicated with the gas outlet of the box body, namely, the length of the pipeline is reduced, so that the pipeline connection is convenient. The gas flow monitoring device and the air pump are matched to ensure that the gas flow flowing out of the gas outlet of the box body meets the requirement of a follow-up gas pollutant collecting cabinet, and the gas flow and the flow speed are effectively prevented from being too high or too low. The gas valve is adopted to control the on and off of the gas inlet and the gas collecting pipe, so that the use personnel can conveniently carry out remote or automatic control, and the PLC is adopted as a central control device to control each electronic gas valve.
In the invention, a plurality of sensors are integrated in the gas pollutant collecting cabinet, wherein the design concept of the plurality of sensors is already applied to some gas collecting devices, but the pressure transmitter and the mass flowmeter connected with the sensors can compensate the collected low-concentration gas, and the matching of the vacuum pump and the gas valve can be controlled and adjusted on the air inflow and the flow rate. The method is a method for effectively improving the acquisition precision in the air environment with low gas concentration and space occlusion such as livestock breeding.
In the invention, an acquisition card is used as an acquisition terminal of each sensor to collect information acquired by each sensor. The wind speed sensor and the temperature and humidity sensor are used for reflecting relevant environments of the collection state, so that corresponding collection conditions can be designed, and the wind speed sensor and the temperature and humidity sensor can also be matched with subsequent data processing work to serve as compensation conditions in data calculation.
According to the invention, the dust concentration sensor and the dehumidification tank which are arranged at the front end of the sensor suction type air chamber are used for carrying out dust concentration detection and dehumidification treatment on the gas entering the acquisition device, so that the influence of the external environment on the subsequent sensor suction type air chamber is reduced, and the detection accuracy is further improved.
In the invention, the suction-type air chamber of the sensor structurally adopts the matching of the collection boxes and the sensor, and the collection boxes are sequentially and tightly installed, so that the occupied space is small, and the detection environment is more closed. Such design can prevent that low concentration gas from taking place the diffusion in the detection position, can keep apart with all the other electric original paper in the sealed cabinet again, effectively prevents the corruption of gaseous pollutant to electric original paper, hoisting device's stability and life.

Claims (10)

1. Multiple gas pollutant is with multiple spot position collection system, its characterized in that: the multi-point sampling box is internally provided with a plurality of box body air inlets and a box body air outlet, the plurality of air inlets are uniformly connected with the air outlet, and one of the plurality of box body air inlets is communicated with the box body air outlet in a use state; a cabinet body air inlet and a cabinet body air outlet are arranged on the side wall of the gas pollutant collecting cabinet, the sensor suction type air chamber is arranged in the gas pollutant collecting cabinet, a plurality of sensors are arranged in the sensor suction type air chamber, each sensor is used for collecting different gas pollutant concentrations, and a pressure transmitter and a mass flow meter are respectively arranged in an airflow pipeline from the cabinet body air inlet to the cabinet body air outlet through the sensor suction type air chamber; in order to adjust the pressure, flow and flow rate of the air flow in the air flow pipeline, a vacuum pump and an air valve are further installed in the air flow pipeline, and the air outlet of the box body of the multipoint sampling box is communicated with the air inlet of the cabinet body of the gas pollutant collecting cabinet.
2. The multiple point location collection system for multiple gaseous pollutants of claim 1, further comprising: and the multipoint sampling box is provided with an air flow monitoring device and an air pump in each pipeline between the box body air inlet and the box body air outlet.
3. The multiple point location collection system for multiple gaseous pollutants according to claim 1 or 2, wherein: each box air inlet of the multipoint sampling box is communicated with an air inlet end of one gas collecting pipe, and an air outlet end of the gas collecting pipe is communicated with a box air outlet.
4. The multiple point location collection system for multiple gaseous pollutants of claim 3, further comprising: a plurality of air valves are installed in the box body, and each air valve is arranged at a position between the air inlet of the box body and the air collecting pipe and used for controlling the conduction and the closing of the corresponding air inlet.
5. The multiple point location collection system for multiple gaseous pollutants of claim 4, wherein: the air valve of the multi-point sampling box adopts an electronic air valve, a central control device is installed in the box body, the central control device adopts a PLC, the PLC can output control signals to the electronic air valve, and the electronic air valve converts the input control signals into voltage signals to adjust the opening degree of the electronic air valve.
6. The multiple point location collection system for multiple gaseous pollutants of claim 1, further comprising: a dust concentration sensor and a dehumidification tank are arranged between a sensor suction type air chamber and an air inlet of a cabinet body in the gas pollutant collection cabinet.
7. The multi-site multiple gas contaminant acquisition system of claim 1, wherein: the gas pollutant collecting cabinet is internally provided with a collecting card, the collecting card is connected with the signal output ends of the sensors, and the signal output end of the collecting card is connected with an upper computer.
8. The multiple point location collection system for multiple gaseous pollutants of claim 1, 6 or 7, wherein: and a temperature and humidity sensor and an air speed sensor are respectively arranged in the gas pollutant collecting cabinet.
9. The multiple point location collection system for multiple gaseous pollutants of claim 1, 6 or 7, wherein: and the mass flow meter and the vacuum pump are sequentially installed between the gas outlet side of the sensor suction type gas chamber in the gas pollutant acquisition cabinet and the gas outlet of the cabinet body.
10. The multiple point location collection system for multiple gaseous pollutants of claim 1, 6 or 7, wherein: the sensor suction type air chamber comprises a plurality of collecting boxes, each collecting box is internally provided with a cavity, an air inlet and an air outlet are arranged in the outer wall of each cavity, each collecting box is communicated in sequence, so that the cavity of each collecting box jointly forms an air guide cavity, the pressure transmitter is arranged in the air guide cavity, and the air guide cavity of the sensor suction type air chamber and the inner space of the sealing cabinet are isolated from each other.
CN202110200681.6A 2021-02-23 2021-02-23 Multi-point position acquisition monitoring system for multiple gas pollutants Pending CN113109506A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110200681.6A CN113109506A (en) 2021-02-23 2021-02-23 Multi-point position acquisition monitoring system for multiple gas pollutants

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110200681.6A CN113109506A (en) 2021-02-23 2021-02-23 Multi-point position acquisition monitoring system for multiple gas pollutants

Publications (1)

Publication Number Publication Date
CN113109506A true CN113109506A (en) 2021-07-13

Family

ID=76709307

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110200681.6A Pending CN113109506A (en) 2021-02-23 2021-02-23 Multi-point position acquisition monitoring system for multiple gas pollutants

Country Status (1)

Country Link
CN (1) CN113109506A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114740159A (en) * 2022-04-14 2022-07-12 成都秦川物联网科技股份有限公司 Natural gas energy metering component acquisition method and Internet of things system
WO2023115846A1 (en) * 2021-12-24 2023-06-29 同方威视技术股份有限公司 Trace gas sampling device and detection system
US11979697B2 (en) 2021-07-26 2024-05-07 Chengdu Qinchuan Iot Technology Co., Ltd. Methods and internet of things systems for obtaining natural gas energy metering component

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103063481A (en) * 2012-12-28 2013-04-24 浙江大学 Automatic sampling device and sampling method for surface source gas
CN103995089A (en) * 2014-05-26 2014-08-20 江苏大学 WSN (Wireless Sensor Network)-based piggery environment perception electronic nose and working method
CN205228513U (en) * 2015-11-20 2016-05-11 河北农业大学 Portable beasts and birds house environment measuring appearance
CN105737905A (en) * 2016-04-28 2016-07-06 中国农业大学 Livestock house air environment quality testing system and use method thereof
CN108955772A (en) * 2018-08-13 2018-12-07 宁夏爱打听科技有限公司 A kind of poultry house quality of air environment detection system and its application method
CN209230670U (en) * 2018-12-24 2019-08-09 北京中成航宇空分设备有限公司 A kind of detection of multichannel combustible gas and remote alarming device
CN111141562A (en) * 2020-02-20 2020-05-12 南京科远智慧科技集团股份有限公司 Low-hysteresis sampling analysis system and method for multi-point polling measurement of smoke pollutants
CN210834353U (en) * 2019-10-24 2020-06-23 潜江市康宏生态禽业有限公司 Poultry farm air quality sampler
CN211697470U (en) * 2019-10-24 2020-10-16 天津市生态环境监测中心 Online monitoring system for ammonia gas emission of livestock and poultry farm
CN112379047A (en) * 2020-11-04 2021-02-19 江苏省农业科学院 Multi-livestock and poultry house environment quality continuous monitoring system and monitoring method

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103063481A (en) * 2012-12-28 2013-04-24 浙江大学 Automatic sampling device and sampling method for surface source gas
CN103995089A (en) * 2014-05-26 2014-08-20 江苏大学 WSN (Wireless Sensor Network)-based piggery environment perception electronic nose and working method
CN205228513U (en) * 2015-11-20 2016-05-11 河北农业大学 Portable beasts and birds house environment measuring appearance
CN105737905A (en) * 2016-04-28 2016-07-06 中国农业大学 Livestock house air environment quality testing system and use method thereof
CN108955772A (en) * 2018-08-13 2018-12-07 宁夏爱打听科技有限公司 A kind of poultry house quality of air environment detection system and its application method
CN209230670U (en) * 2018-12-24 2019-08-09 北京中成航宇空分设备有限公司 A kind of detection of multichannel combustible gas and remote alarming device
CN210834353U (en) * 2019-10-24 2020-06-23 潜江市康宏生态禽业有限公司 Poultry farm air quality sampler
CN211697470U (en) * 2019-10-24 2020-10-16 天津市生态环境监测中心 Online monitoring system for ammonia gas emission of livestock and poultry farm
CN111141562A (en) * 2020-02-20 2020-05-12 南京科远智慧科技集团股份有限公司 Low-hysteresis sampling analysis system and method for multi-point polling measurement of smoke pollutants
CN112379047A (en) * 2020-11-04 2021-02-19 江苏省农业科学院 Multi-livestock and poultry house environment quality continuous monitoring system and monitoring method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11979697B2 (en) 2021-07-26 2024-05-07 Chengdu Qinchuan Iot Technology Co., Ltd. Methods and internet of things systems for obtaining natural gas energy metering component
WO2023115846A1 (en) * 2021-12-24 2023-06-29 同方威视技术股份有限公司 Trace gas sampling device and detection system
CN114740159A (en) * 2022-04-14 2022-07-12 成都秦川物联网科技股份有限公司 Natural gas energy metering component acquisition method and Internet of things system
CN114740159B (en) * 2022-04-14 2023-09-19 成都秦川物联网科技股份有限公司 Natural gas energy metering component acquisition method and Internet of things system

Similar Documents

Publication Publication Date Title
CN113109506A (en) Multi-point position acquisition monitoring system for multiple gas pollutants
CN202204805U (en) Environmental air quality automatic monitoring system
CN103217320A (en) Gas processing apparatus and medical equipment
CN206593914U (en) Multi-functional many gas circuit adjustable flow gas samplers and system
CN101839959A (en) Method and device for locating electrical failure of SF6 equipment
CN202485717U (en) Sulfur hexafluoride electrical equipment gas comprehensive detector
CN206540736U (en) A kind of intelligent atmosphere sampling instrument
CN210604585U (en) Detection device and detection system for air gaseous pollutants
CN208537353U (en) Open-air monitoring device
CN207036665U (en) A kind of gas detecting system
CN109557008A (en) Dust concentration measurer and dust concentration measuring kit
CN211825813U (en) Multifunctional air quality detector
CN115236273A (en) Multi-gas-path valve box for gas analyzer
CN105823812B (en) Air detection instrument and its working method
CN211825811U (en) High-precision bus gas detection module
CN211085340U (en) Portable flow and air tightness calibrating device
CN214844283U (en) Acquisition device applied to various gas pollutants under low-concentration condition
CN214472939U (en) Gas monitoring assembly
CN2731442Y (en) Infrared Co tester
CN207832758U (en) A kind of gas controlling device
CN201740843U (en) SF6 equipment electrical failure location device
CN110672793A (en) Multi-parameter microenvironment air quality monitoring device capable of achieving rapid and accurate detection
CN215180056U (en) Environmental quality comprehensive assessment monitoring terminal with high testing accuracy
CN219328469U (en) Sensor shell for detection
CN214474045U (en) Atmospheric environment monitoring equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20210713