CN102621279B - Pollutant discharge monitoring device and system - Google Patents

Pollutant discharge monitoring device and system Download PDF

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Publication number
CN102621279B
CN102621279B CN201210068910.4A CN201210068910A CN102621279B CN 102621279 B CN102621279 B CN 102621279B CN 201210068910 A CN201210068910 A CN 201210068910A CN 102621279 B CN102621279 B CN 102621279B
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monitoring
communication module
circuit
data
voltage
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CN102621279A (en
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张和生
潘成
刘志勇
孙伟
韩博
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Beijing Jiaotong University
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Beijing Jiaotong University
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Abstract

The invention discloses pollutant discharge monitoring device and system, and belongs to the field of pollutant monitoring. The pollutant discharge monitoring device is a complete pollutant discharge monitoring device, a first independent monitoring device, a first cooperation monitoring system or a first convergent node monitoring device. The device and the system have the advantages that 1) the monitoring device is provided with various types of interface circuits; 2) the structure of the device can be simplified, and the function of the device can be reduced; 3) various communication and networking modes can be adopted by the system; 4) an ultralimit reminding function is realized; 5) monitoring data is stored in a database, so that the data is convenient to manage and utilize; and 6) the system has high expandability.

Description

A kind of pollutant emission monitoring device and system
Technical field
The invention belongs to pollutant monitoring field, particularly a kind of pollutant emission monitoring device and system.The invention provides a kind of pollutant emission monitoring system comprising several data transmission mode, be applicable to plurality of application scenes, realize Real-Time Monitoring, the Web Publishing of the discharge of dye thing and prompting of transfiniting.
Background technology
Problem of environmental pollution has affected and becomes increasingly conspicuous since the eighties, has become very important global problem.The most direct disposal of pollutants situation can be obtained, for environmental management, pollution source apportionment, environmental planning provide scientific basis by carrying out monitoring to pollutant emission.
Existing pollutant emission monitoring technology mainly contains human at periodic intervals's monitoring and on-line monitoring.Personal monitoring's mode regularly arranges personnel to carry out sampling and detecting to pollutant emission point, then testing result reported.On-line monitoring mode is then automatically carry out continuous detecting to measured by monitoring device, then uploads monitoring result by communication network.
Personal monitoring's mode data report and postpone greatly, and sample frequency is low, cannot obtain the pollutant emission variation tendency in the short time, and easily introduce personal error.Be difficult to implement monitoring by manual type at bad environments and remote location area.And existing pollutant emission on-Line Monitor Device network function is more single, often only for certain applications.If the pollutant kind that needs carry out monitoring is many, scope large, monitoring point skewness, then existing on-line monitoring system is difficult to reply.
Summary of the invention
The present invention is directed to above-mentioned defect and disclose a kind of pollutant emission monitoring device and system, provide a kind of networking flexibility, the distributed real-time pollutant emission monitoring device be extensively suitable for and system, achieve the system combination to multiple monitoring deployment scenario.
A kind of pollutant emission monitoring device is complete pollutant emission monitoring device, the 1st independent monitoring device, the 1st cooperation monitoring device or the 1st aggregation node monitoring device;
The structure of complete pollutant emission monitoring device is as follows: sensing unit, interface circuit and processor are sequentially connected in series, processor connects field communications module, remote communication module, clock chip and storer respectively, one termination external power supply of power supply, the other end connects sensing unit, interface circuit, processor, field communications module, remote communication module, clock chip and storer respectively;
1st independent monitoring device is the device removing field communications module and formed in complete pollutant emission monitoring device; 1st independent monitoring device sends Monitoring Data by remote communication module directly to data center;
1st cooperation monitoring device is the device removing remote communication module and formed in complete pollutant emission monitoring device; 1st cooperates monitoring device by field communications module to the 1st aggregation node monitoring device transmission of monitoring data;
1st aggregation node monitoring device or there is identical structure with complete pollutant emission monitoring device, or in complete pollutant emission monitoring device, remove sensing unit and interface circuit and the device formed.
The measured electric signal that is converted to, for detecting tested pollutant, exports by described sensing unit; Sensing unit is sensitive element, sensor or transmitter;
Described interface circuit is used for the output signal of sensing unit being nursed one's health, being converted into the digital signal that can be processed by the processor; Interface circuit comprises voltage signal interface circuit, current signal interface circuit, frequency signal interface circuit and serial digital signal interface circuit.
Described voltage signal interface circuit is followed in series to form by filtering circuit, amplifying circuit and analog to digital conversion circuit; Filtering circuit is by the interference in voltage signal and noise filtering; Amplifying circuit changes the amplitude of voltage signal, and reduces the output impedance of signal thus alleviate the impact of subsequent conditioning circuit on input voltage signal; Analog voltage signal after prime conditioning is converted to digital signal by analog to digital conversion circuit; The output digit signals of analog to digital conversion circuit adopts serial or parallel mode to access processor;
Described current signal interface circuit increases current-voltage conversion circuit and is formed in the front end of voltage interface circuit, first current signal is converted into voltage signal by current signal interface circuit, then nurses one's health according to voltage signal interface circuit the voltage signal after conversion and change.
Described frequency signal interface circuit is followed in series to form by filtering circuit, voltage conversion circuit and timing/counting circuit; Filtering circuit is by the interference in frequency signal and noise filtering; Input frequency signal voltage transitions is the voltage with counter match by voltage conversion circuit; Timing/counting circuit is used for the frequency values of calculated rate signal.Timing/counting circuit output digit signals access processor.
Described serial digital signal interface circuit is made up of level shifting circuit and voltage isolation link; Level shifting circuit is used for incoming serial signal level to be converted to the level mated with processor; Voltage isolation circuit is used for isolating the signal of sensing unit and processor, prevents it from mutually disturbing.
Described field communications module is used for transmitting data between pollutant emission monitoring device; Field communications module is ZigBee communication module or CAN; ZigBee communication module for setting up wireless sensor network, realize distance within 100m, communication energy consumption is at the multi-hop wireless communication of below 100mW; Described CAN is used for transmitting field monitoring data in a wired fashion by CAN;
Described remote communication module is used for transmission of monitoring data between pollutant emission monitoring device and data center, and remote communication module is GSM/GPRS communication module or ethernet communication module;
Described GSM/GPRS communication module is connected to internet by GPRS network, and connects with data center, wirelessly to data center's transmission of monitoring data; In addition, when Monitoring Data exceedes the alarm threshold value preset, GSM/GPRS communication module can send alarming short message by GSM network to short message receiving terminal; Described ethernet communication module is connected by the second Ethernet and data center, in a wired fashion to data center's transmission data.
Described clock chip performs Clocked operation, and providing package is containing the time scale information of current date and time;
Described storer is used for storage of processor program, Monitoring Data and alarm threshold value;
Described processor management field communications module, remote communication module, sensing unit, interface circuit, clock chip and storer, and Monitoring Data is processed;
When Monitoring Data is delivered to processor by interface circuit by sensing unit, processor reads time scale information from clock chip, and add time scale information to Monitoring Data afterbody, target Monitoring Data stored into memory when then will with the addition of, and sent by field communications module or remote communication module;
External power supply is transformed to operating voltage needed for device each several part circuit by described power supply, and device each several part circuit is sensing unit, interface circuit, processor, field communications module, remote communication module, clock chip and storer;
External power supply is 220V AC power or battery.
Described field communications module, remote communication module can both adopt inserting mode to install on circuit boards, specifically refer to: mounting receptacle on circuit boards, and communication module and remote communication module install contact pin at the scene, the contact pin of field communications module or remote communication module is inserted respective socket;
When not needing field communications module or remote communication module, field communications module or remote communication module are pulled up from circuit board.
A kind of structure of pollutant emission monitoring system is as follows: the 1st independent monitoring device is connected by network and data center to N independence monitoring device, the 1st aggregation node monitoring device to M aggregation node monitoring device; Data center and the 1st is supervised user terminal and supervises user terminal to L and be connected by the first Ethernet, and the i-th aggregation node monitoring device is communicated to the Ki monitoring device that cooperates by its field communications module monitoring device that cooperates with the 1st respectively, and i gets 1-M; M gets and is more than or equal to 1, N and gets and be more than or equal to 1, L and get and be more than or equal to 1, Ki and get and be more than or equal to 3;
Described network is GSM/GPRS network or the second Ethernet, and when network is GSM/GPRS network, short message receiving terminal is connected to the network;
2nd independent monitoring device all has identical structure with the 1st independent monitoring device to N independence monitoring device;
2nd cooperation monitoring device has identical structure to the Ki monitoring device monitoring device that all cooperates with the 1st that cooperates;
2nd aggregation node monitoring device all has identical structure with the 1st aggregation node monitoring device to M aggregation node monitoring device.
Described 1st independent monitoring device is all deployed in monitoring field to Ki cooperation monitoring device and the 1st aggregation node monitoring device to M aggregation node monitoring device, for the discharge of monitoring pollution thing and to data center's transmission of monitoring data to N independence monitoring device, the 1st cooperation monitoring device;
The monitoring point disposed in dispersion is equipped with independent monitoring device, and the monitoring point that dispersion is disposed and other monitoring points are at a distance of more than 500m; 1st independent monitoring device to N independence monitoring device directly by network to data center's transmission of monitoring data;
Be equipped with cooperation monitoring device and aggregation node monitoring device in the monitoring point of dense deployment, the monitoring point of dense deployment and other monitoring points are within 500m; 1st cooperation monitoring device forms sensor network to Ki cooperation monitoring device and the i-th aggregation node monitoring device by ZigBee-network, or is connected by CAN, transmission field monitoring data; I-th aggregation node monitoring device by wireless sensor network or CAN collect the 1st cooperation monitoring device to Ki cooperate monitoring device Monitoring Data and transmitted to data center by network.
Described data center Internet or the second Ethernet set up server, set up TCP be connected with the 1st independent monitoring device to N independence monitoring device and the 1st aggregation node monitoring device to M aggregation node monitoring device, receive the Monitoring Data uploaded; Then building database, stores Monitoring Data in a database, issues Monitoring Data finally by the first Ethernet.
Described 1st supervision user terminal is supervised user terminal to L and is all received Monitoring Data that data center issues and shown by user interface.
Beneficial effect of the present invention is:
1) described monitoring device has polytype interface circuit, comprises voltage interface, current interface, frequency signal interface and serial digital interface, can access pollutant sensing element or the device of various common type.
2) 26S Proteasome Structure and Function of device can cutting, the hardware such as field communications module and remote transmission module can be set as required, form the independent monitoring device being adapted to disperse to dispose, or be adapted to multiple spot monitoring, the cooperation monitoring device of dense deployment and aggregation node monitoring device.
3) system can adopt multiple communication and networking mode, comprises wired and wireless, short distance and long-range, is applicable to multiple pollutant emission monitoring scene.For the scene that dispersion is disposed, use GPRS or the direct transmission of monitoring data of Ethernet mode; For the scene of dense deployment, use Zigbee protocol to form sensor network or use CAN protocol to form CAN and collect field data.
4) there is the prompting function that transfinites.Alarming short message can be sent directly to managerial personnel's mobile phone when pollutant emission exceeds standard, be convenient to process contamination accident in time.
5) adopt database purchase Monitoring Data, be convenient to the management and use of data.Issue monitoring result by Ethernet, Monitoring Data can be observed at any Net-connected computer by client-side program, facilitate managerial personnel to the management of pollutant emission.
6) system expandability is strong, and described aggregation node monitoring device not only can access described cooperation monitoring device, can also access the detecting device that other have ZigBee or CAN communication function.Adopt different sensing units or detecting device can form pollutant emission monitoring system for different monitoring target, as sewage discharge monitoring system, toxic emission monitoring system etc.
Accompanying drawing explanation
Fig. 1 a is the structural representation of complete pollutant emission monitoring device;
Fig. 1 b is the structural representation of the 1st independent monitoring device;
Fig. 1 c is the structural representation of the 1st cooperation monitoring device;
Fig. 1 d is a kind of structural representation of the 1st aggregation node monitoring device;
Fig. 2 a is the structural representation of voltage signal interface circuit;
Fig. 2 b is the structural representation of current signal interface circuit;
Fig. 2 c is the structural representation of current-voltage conversion circuit;
Fig. 2 d is the structural representation of frequency signal interface circuit;
Fig. 2 e is the structural representation of serial digital signal interface circuit;
Fig. 3 a is the structural representation of pollutant emission monitoring system;
Fig. 3 b is the first embodiment schematic diagram of pollutant emission monitoring system;
Fig. 3 c is the second embodiment schematic diagram of pollutant emission monitoring system;
Fig. 4 is the schematic diagram of an embodiment of pollutant emission monitoring device.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
A kind of pollutant emission monitoring device is complete pollutant emission monitoring device, the 1st independent monitoring device, the 1st cooperation monitoring device or the 1st aggregation node monitoring device;
As shown in Figure 1a, the structure of complete pollutant emission monitoring device is as follows: sensing unit, interface circuit and processor are sequentially connected in series, processor connects field communications module, remote communication module, clock chip and storer respectively, one termination external power supply of power supply, the other end connects sensing unit, interface circuit, processor, field communications module, remote communication module, clock chip and storer respectively;
As shown in Figure 1 b, the 1st independent monitoring device is the device removing field communications module and formed in complete pollutant emission monitoring device; 1st independent monitoring device, for disperseing the monitoring point disposed, sends Monitoring Data by remote communication module directly to data center;
As illustrated in figure 1 c, the 1st cooperation monitoring device is the device removing remote communication module and formed in complete pollutant emission monitoring device; 1st cooperation monitoring device is used for concentrating the monitoring point disposed, by field communications module to the 1st aggregation node monitoring device transmission of monitoring data;
1st aggregation node monitoring device or there is identical structure with complete pollutant emission monitoring device, or in complete pollutant emission monitoring device, remove sensing unit and interface circuit and the device formed, as shown in Figure 1 d.
The measured electric signal that is converted to, for detecting tested pollutant, exports by sensing unit; Sensing unit is sensitive element, sensor or transmitter;
Interface circuit is used for the output signal of sensing unit being nursed one's health, being converted into the digital signal that can be processed by the processor; Interface circuit comprises voltage signal interface circuit, current signal interface circuit, frequency signal interface circuit and serial digital signal interface circuit.
As shown in Figure 2 a, voltage signal interface circuit is followed in series to form by filtering circuit, amplifying circuit and analog to digital conversion circuit; Filtering circuit is by the interference in voltage signal and noise filtering; The amplitude that amplifying circuit changes voltage signal makes it to be easy to process, and reduces the output impedance of signal thus alleviate the impact of subsequent conditioning circuit on input voltage signal; Analog voltage signal after prime conditioning is converted to digital signal by analog to digital conversion circuit; The output digit signals of analog to digital conversion circuit adopts serial or parallel mode to access processor;
Current signal is not owing to being subject to the impact of transmission loop resistance, and interference free performance is stronger, and therefore main flow transmitter often adopts current signal as output signal.As shown in Figure 2 b, described current signal interface circuit increases current-voltage conversion circuit and is formed in the front end of voltage interface circuit, first current signal is converted into voltage signal by current signal interface circuit, then nurses one's health according to voltage signal interface circuit the voltage signal after conversion and change.
Be an embodiment of the current-voltage conversion circuit in current signal interface circuit as shown in Figure 2 c:
This circuit adopts operational amplifier 11 to realize the conversion of current-voltage, and the output terminal of operational amplifier 11 receives negative input end by the first feedback resistance R1b and the second feedback resistance R1a successively, the negative input termination input current Iin of operational amplifier 11; The positive input terminal of operational amplifier 11 is connected to earth potential by the first build-out resistor R2a and the second build-out resistor R2b, wherein R1a=R2a, R1b=R2b successively; The output voltage Uout of this circuit and the relation of input current Iin as follows: U out=-(R1a+R1b) × I in
As shown in Figure 2 d, frequency signal interface circuit is followed in series to form by filtering circuit, voltage conversion circuit and timing/counting circuit; Filtering circuit is by the interference in frequency signal and noise filtering; Input frequency signal voltage transitions is the voltage with counter match by voltage conversion circuit; Timing/counting circuit is used for the frequency values of calculated rate signal.Timing/counting circuit output digit signals access processor.
Some pick-up unit (sensing unit) has been integrated with signal condition and change-over circuit, directly can export serial digital signal.As shown in Figure 2 e, described serial digital signal interface circuit is made up of level shifting circuit and voltage isolation link; Level shifting circuit is used for incoming serial signal level (serial digital signal transmission mode comprises RS232 and RS485) to be converted to the level mated with processor; Voltage isolation circuit is used for isolating the signal of sensing unit and processor, prevents it from mutually disturbing.
Field communications module is used for transmitting data between pollutant emission monitoring device; Field communications module is ZigBee communication module or CAN; ZigBee communication module for setting up wireless sensor network, realize distance within 100m, communication energy consumption is at the multi-hop wireless communication (carrying out Wireless Data Transmission by the mode of multiple spot relay) of below 100mW; Described CAN is used for transmitting field monitoring data in a wired fashion by CAN;
Remote communication module is used for transmission of monitoring data between pollutant emission monitoring device and data center, and remote communication module is GSM/GPRS communication module or ethernet communication module;
GSM/GPRS communication module is connected to internet by GPRS network, and connects with data center, wirelessly to data center's transmission of monitoring data; In addition, when Monitoring Data exceedes the alarm threshold value preset, GSM/GPRS communication module can send alarming short message by GSM network to short message receiving terminal; Described ethernet communication module is connected by the second Ethernet and data center, in a wired fashion to data center's transmission data.
Clock chip performs Clocked operation, and providing package is containing the time scale information of current date and time;
Storer is used for storage of processor program, Monitoring Data and alarm threshold value;
Processor management field communications module, remote communication module, sensing unit, interface circuit, clock chip and storer, and Monitoring Data is processed;
When Monitoring Data is delivered to processor by interface circuit by sensing unit, processor reads time scale information from clock chip, and add time scale information to Monitoring Data afterbody, target Monitoring Data stored into memory when then will with the addition of, and sent by field communications module or remote communication module;
External power supply is transformed to operating voltage needed for device each several part circuit by power supply, for each several part of pollutant emission monitoring device is powered; , device each several part circuit is sensing unit, interface circuit, processor, field communications module, remote communication module, clock chip and storer;
External power supply is 220V AC power or battery.
Field communications module, remote communication module can both adopt inserting mode to install on circuit boards, specifically refer to: mounting receptacle on circuit boards, and communication module and remote communication module install contact pin at the scene, the contact pin of field communications module or remote communication module is inserted respective socket;
When not needing field communications module or remote communication module, field communications module or remote communication module are pulled up from circuit board.
As shown in Figure 3 a, a kind of structure of pollutant emission monitoring system is as follows: the 1st independent monitoring device is connected by network and data center to N independence monitoring device, the 1st aggregation node monitoring device to M aggregation node monitoring device; Data center and the 1st is supervised user terminal and supervises user terminal to L and be connected by the first Ethernet, and the i-th aggregation node monitoring device is communicated to the Ki monitoring device that cooperates by its field communications module monitoring device that cooperates with the 1st respectively, and i gets 1-M; M gets and is more than or equal to 1, N and gets and be more than or equal to 1, L and get and be more than or equal to 1, Ki and get and be more than or equal to 3;
Described network is GSM/GPRS network or the second Ethernet, and when network is GSM/GPRS network, short message receiving terminal is connected to the network;
2nd independent monitoring device all has identical structure with the 1st independent monitoring device to N independence monitoring device;
2nd cooperation monitoring device has identical structure to the Ki monitoring device monitoring device that all cooperates with the 1st that cooperates;
2nd aggregation node monitoring device all has identical structure with the 1st aggregation node monitoring device to M aggregation node monitoring device.
1st independent monitoring device is all deployed in monitoring field to Ki cooperation monitoring device and the 1st aggregation node monitoring device to M aggregation node monitoring device, for the discharge of monitoring pollution thing and to data center's transmission of monitoring data to N independence monitoring device, the 1st cooperation monitoring device;
According to the difference of application scenarios, pollutant emission monitoring device can have different version and networking mode.
The monitoring point disposed in dispersion is equipped with independent monitoring device, and the monitoring point that dispersion is disposed and other monitoring points are at a distance of more than 500m; To N independence monitoring device, directly by network, directly to data center's transmission of monitoring data, (GSM/GPRS module carries out long distance wireless communication to 1st independent monitoring device, internet is connected to, directly to data center's transmission of monitoring data) by GPRS network;
Be equipped with cooperation monitoring device and aggregation node monitoring device in the monitoring point of dense deployment, the monitoring point of dense deployment and other monitoring points are within 500m; 1st cooperation monitoring device forms sensor network to Ki cooperation monitoring device and the i-th aggregation node monitoring device by ZigBee-network 12, or is connected by CAN 13, transmission field monitoring data; I-th aggregation node monitoring device by wireless sensor network or CAN 13 collect the 1st cooperation monitoring device to Ki cooperate monitoring device Monitoring Data and transmitted to data center by network.
Data center's Internet or the second Ethernet set up server, set up TCP be connected with the 1st independent monitoring device to N independence monitoring device and the 1st aggregation node monitoring device to M aggregation node monitoring device, receive the Monitoring Data uploaded; Then building database, stores Monitoring Data in a database, issues Monitoring Data finally by the first Ethernet.Data center can be the computing machine having web server function and be equipped with mass-memory unit.
It can be the computing machine with network interface that 1st supervision user terminal supervises user terminal to L; 1st supervision user terminal is supervised user terminal to L and is all received Monitoring Data that data center issues and shown by user interface.Managerial personnel can observe the real time data of pollutant emission by user interface.
Short message receiving terminal receives the note that the 1st independent monitoring device is sent by GSM network to N independence monitoring device and the 1st aggregation node monitoring device to M aggregation node monitoring device.
In the course of work of the present invention, preset pollutant monitoring threshold value and be stored in the storer of pollutant emission monitoring device, when Monitoring Data exceedes this threshold value, independent observation circuit or aggregation node observation circuit send alarming short message by GSM/GPRS module to short message receiving terminal.This short message receiving terminal can be the mobile phone of pollutant emission managerial personnel.
The embodiment 1 of pollutant emission monitoring device:
As shown in Figure 4, a microprocessor and a ZigBee transceiver (meeting the rf receiver and transmitter of ZigBee standard) is comprised in CC2530 chip, data are exchanged by first serial 1 between CC2530 chip and GSM/GPRS communication module, a delivery outlet of CC2530 chip is connected by control line 4 with GSM/GPRS communication module, CC2530 chip connects nonvolatile memory and clock chip respectively by SPI interface 3, the output of flowmeter is 485 signals, and this signal carries out through 485 interfaces the second serial 2 accessing CC2530 after level translation.
CC2530 chip can simultaneously as processor and ZigBee communication module.And use CC2530 chip can more easily implement device can clipping function, when device needs to have ZigBee communication function, can to the program of CC2530 loaded ribbon protocols having stack; When device does not need to have ZigBee communication function, can to the program of CC2530 loading not with protocol stack.
The present embodiment uses the GSM/GPRS communication module with serial ports and work method control pin.Data are exchanged by serial ports 1 between CC2530 chip and GSM/GPRS communication module.In addition, a delivery outlet and the GSM/GPRS communication module of CC2530 chip control pin and are connected, and CC2530 chip control GSM/GPRS communication module can be operated in GPRS data transmission or GSM message transmission state by the state changing this delivery outlet.GSM/GPRS communication module adopts inserting mode to be connected on circuit board, so that accept or reject flexibly.
There is in CC2530 chip the storage space of 64K, can as program and data-carrier store.In addition, in sheet external expansion a slice nonvolatile memory chip, can be used for the parameter that store alarms threshold value etc. is comparatively crucial.Even if the parameter be stored in nonvolatile memory also can not be lost when device power down.
SPI interface is a kind of Serial Peripheral Interface (SPI) of master-slave mode, the main frame that CC2530 chip communicates as SPI, and nonvolatile memory and clock chip are as from machine.CC2530 chip clock signal and chip selection signal, thus optionally can exchange data with nonvolatile memory or clock chip.
This embodiment uses powered battery.Cell voltage is transformed into low voltage through DC-DC voltage transformation chip, then through the voltage that linear voltage regulator output ripple is less, as the power supply of other parts of device (CC2530 chip, GSM/GPRS communication module, nonvolatile memory, clock chip, flowmeter and 485 interfaces).
The sensitive element of this embodiment is flowmeter, for detecting sewerage discharging flow.The output of flowmeter is 485 signals, and this signal carries out through 485 interfaces the serial ports 2 accessing CC2530 after level translation.
The embodiment 2 of pollutant emission monitoring device:
In this embodiment, described flowmeter output signal is the current signal of 4 ~ 20mA.Described interface circuit is the combination of current/charge-voltage convertor and analog to digital conversion circuit.
The embodiment 3 of pollutant emission monitoring device:
In this embodiment, provide a kind of exhaust gas concentration monitoring device, in this embodiment, described sensitive element is gas concentration detecting device, and its output signal is voltage signal, and described interface circuit is analog to digital conversion circuit.
The embodiment 4 of pollutant emission monitoring device:
In this embodiment, ZigBee communication module and GSM/GPRS module all adopt inserting mode to be connected in device circuit board.I.e. mounting receptacle in device circuit board, and contact pin is installed in ZigBee communication module and GSM/GPRS module, by ZigBee communication module or GSM/GPRS module contact pin insertion respective socket being realized the connection of itself and other partial circuits of pollutant emission monitoring device.Can be pulled up easily when not needing ZigBee communication module or GSM/GPRS module.The flexible choice of ZigBee communication module and GSM/GPRS module can be realized by this connected mode.
The embodiment 1 of pollutant emission monitoring system:
As shown in Figure 3 b, in this embodiment, network is GSM/GPRS network, and GSM/GPRS network is connected with data center by internet, and GSM/GPRS network is also connected with short message receiving terminal.
The embodiment 2 of pollutant emission monitoring system:
As shown in Figure 3 c, in this embodiment, network is the second Ethernet.
The embodiment 3 of pollutant emission monitoring system:
In this embodiment, the monitoring target of system comprises flow and the SO of sewage discharge 2gas discharging concentration.Wherein, Sewage outlet is distributed in each factory building, distant; And multiple SO 2gas concentration inspect point dense distribution is near boiler chimney.Therefore dispose independent monitoring device at Sewage outlet, count its sensitive element with flow, directly pass through GPRS mode to data center's transmission of monitoring data; And at SO 2gas concentration inspect point adopts sensing node and aggregation node to form sensor network, collects Monitoring Data by aggregation node by Zigbee protocol, then in GPRS mode to data center's transmission of monitoring data, with SO 2concentration detector is the sensitive element of sensing node.

Claims (2)

1. a pollutant emission monitoring device, is characterized in that, it provides a kind of pollutant emission monitoring system comprising several data transmission mode, be applicable to plurality of application scenes, realizes Real-Time Monitoring, the Web Publishing of the discharge of dye thing and prompting of transfiniting; It is based on complete pollutant emission monitoring device, by the difference of hardware grafting and the difference of program, forms the 1st independent monitoring device, the 1st cooperation monitoring device or the 1st aggregation node monitoring device;
The structure of complete pollutant emission monitoring device is as follows: sensing unit, interface circuit and processor are sequentially connected in series, processor connects field communications module, remote communication module, clock chip and storer respectively, one termination external power supply of power supply, the other end connects sensing unit, interface circuit, processor, field communications module, remote communication module, clock chip and storer respectively;
Described field communications module, remote communication module can both adopt inserting mode to install on circuit boards, specifically refer to: mounting receptacle on circuit boards, and communication module and remote communication module install contact pin at the scene, the contact pin of field communications module or remote communication module is inserted respective socket; When not needing field communications module or remote communication module, field communications module or remote communication module are pulled up from circuit board;
1st independent monitoring device is the device removing field communications module and formed in complete pollutant emission monitoring device; 1st independent monitoring device sends Monitoring Data by remote communication module directly to data center;
1st cooperation monitoring device is the device removing remote communication module and formed in complete pollutant emission monitoring device; 1st cooperates monitoring device by field communications module to the 1st aggregation node monitoring device transmission of monitoring data;
1st aggregation node monitoring device or there is identical structure with complete pollutant emission monitoring device, or in complete pollutant emission monitoring device, remove sensing unit and interface circuit and the device formed;
The measured electric signal that is converted to, for detecting tested pollutant, exports by described sensing unit; Sensing unit is sensitive element, sensor or transmitter;
Described interface circuit is used for the output signal of sensing unit being nursed one's health, being converted into the digital signal that can be processed by the processor; Interface circuit comprises voltage signal interface circuit, current signal interface circuit, frequency signal interface circuit and serial digital signal interface circuit;
Described voltage signal interface circuit is followed in series to form by filtering circuit, amplifying circuit and analog to digital conversion circuit; Filtering circuit is by the interference in voltage signal and noise filtering; Amplifying circuit changes the amplitude of voltage signal, and reduces the output impedance of signal thus alleviate the impact of subsequent conditioning circuit on input voltage signal; Analog voltage signal after prime conditioning is converted to digital signal by analog to digital conversion circuit; The output digit signals of analog to digital conversion circuit adopts serial or parallel mode to access processor;
Described current signal interface circuit increases current-voltage conversion circuit and is formed in the front end of voltage interface circuit, first current signal is converted into voltage signal by current signal interface circuit, then nurses one's health according to voltage signal interface circuit the voltage signal after conversion and change;
Described frequency signal interface circuit is followed in series to form by filtering circuit, voltage conversion circuit and timing/counting circuit; Filtering circuit is by the interference in frequency signal and noise filtering; Input frequency signal voltage transitions is the voltage with counter match by voltage conversion circuit; Timing/counting circuit is used for the frequency values of calculated rate signal; Timing/counting circuit output digit signals access processor;
Described serial digital signal interface circuit is made up of level shifting circuit and voltage isolation link; Level shifting circuit is used for incoming serial signal level to be converted to the level mated with processor; Voltage isolation circuit is used for isolating the signal of sensing unit and processor, prevents it from mutually disturbing;
Described field communications module is used for transmitting data between pollutant emission monitoring device; Field communications module is ZigBee communication module or CAN; ZigBee communication module for setting up wireless sensor network, realize distance within 100m, communication energy consumption is at the multi-hop wireless communication of below 100mW; Described CAN is used for transmitting field monitoring data in a wired fashion by CAN;
Described remote communication module is used for transmission of monitoring data between pollutant emission monitoring device and data center, and remote communication module is GSM/GPRS communication module or ethernet communication module;
Described GSM/GPRS communication module is connected to internet by GPRS network, and connects with data center, wirelessly to data center's transmission of monitoring data; In addition, when Monitoring Data exceedes the alarm threshold value preset, GSM/GPRS communication module can send alarming short message by GSM network to short message receiving terminal; Described ethernet communication module is connected by the second Ethernet and data center, in a wired fashion to data center's transmission data;
Described clock chip performs Clocked operation, and providing package is containing the time scale information of current date and time;
Described storer is used for storage of processor program, Monitoring Data and alarm threshold value;
Described processor management field communications module, remote communication module, sensing unit, interface circuit, clock chip and storer, and Monitoring Data is processed;
When Monitoring Data is delivered to processor by interface circuit by sensing unit, processor reads time scale information from clock chip, and add time scale information to Monitoring Data afterbody, target Monitoring Data stored into memory when then will with the addition of, and sent by field communications module or remote communication module;
External power supply is transformed to operating voltage needed for device each several part circuit by described power supply, and device each several part circuit is sensing unit, interface circuit, processor, field communications module, remote communication module, clock chip and storer;
External power supply is 220V AC power or battery;
Described pollutant emission monitoring device comprises: CC2530 chip, a microprocessor and a ZigBee transceiver is comprised in CC2530 chip, data are exchanged by first serial (1) between CC2530 chip and GSM/GPRS communication module, a delivery outlet of CC2530 chip is connected by control line (4) with GSM/GPRS communication module, CC2530 chip connects nonvolatile memory and clock chip respectively by SPI interface (3), the output of flowmeter is 485 signals, this signal carries out through 485 interfaces the second serial (2) accessing CC2530 after level translation,
CC2530 chip can simultaneously as processor and ZigBee communication module; And use CC2530 chip can more easily implement device can clipping function, when device needs to have ZigBee communication function, can to the program of CC2530 loaded ribbon protocols having stack; When device does not need to have ZigBee communication function, can to the program of CC2530 loading not with protocol stack;
Use the GSM/GPRS communication module with serial ports and work method control pin; Data are exchanged by serial ports (1) between CC2530 chip and GSM/GPRS communication module; In addition, a delivery outlet and the GSM/GPRS communication module of CC2530 chip control pin and are connected, and CC2530 chip control GSM/GPRS communication module can be operated in GPRS data transmission or GSM message transmission state by the state changing this delivery outlet; GSM/GPRS communication module adopts inserting mode to be connected on circuit board, so that accept or reject flexibly;
There is in CC2530 chip the storage space of 64K, can as program and data-carrier store; In addition, in sheet external expansion a slice nonvolatile memory chip, can be used for the parameter of store alarms threshold value; Even if the parameter be stored in nonvolatile memory also can not be lost when device power down;
SPI interface is a kind of Serial Peripheral Interface (SPI) of master-slave mode, the main frame that CC2530 chip communicates as SPI, and nonvolatile memory and clock chip are as from machine; CC2530 chip clock signal and chip selection signal, thus optionally can exchange data with nonvolatile memory or clock chip;
Use powered battery; Cell voltage is transformed into low voltage through DC-DC voltage transformation chip, then through the voltage that linear voltage regulator output ripple is less, as the power supply of other parts of device;
Sensitive element is flowmeter, and for detecting sewerage discharging flow, the output of flowmeter is 485 signals, and this signal carries out through 485 interfaces the serial ports (2) accessing CC2530 after level translation; Or sensitive element is gas concentration detecting device, its output signal is voltage signal, and interface circuit is analog to digital conversion circuit;
Described current signal interface circuit adopts operational amplifier (11) to realize the conversion of current-voltage, the output terminal of operational amplifier (11) receives negative input end by the first feedback resistance R1b and the second feedback resistance R1a successively, the negative input termination input current Iin of operational amplifier (11); The positive input terminal of operational amplifier (11) is connected to earth potential by the first build-out resistor R2a and the second build-out resistor R2b, wherein R1a=R2a, R1b=R2b successively; The output voltage Uout of this circuit and the relation of input current Iin as follows: U out=-(R1a+R1b) × I in.
2. a pollutant emission monitoring system, is characterized in that, its structure is as follows: the 1st independent monitoring device is connected by network and data center to N independence monitoring device, the 1st aggregation node monitoring device to M aggregation node monitoring device; Data center and the 1st is supervised user terminal and supervises user terminal to L and be connected by the first Ethernet, and the i-th aggregation node monitoring device is communicated to the Ki monitoring device that cooperates by its field communications module monitoring device that cooperates with the 1st respectively, and i gets 1-M; M gets and is more than or equal to 1, N and gets and be more than or equal to 1, L and get and be more than or equal to 1, Ki and get and be more than or equal to 3;
Described network is GSM/GPRS network or the second Ethernet, and when network is GSM/GPRS network, short message receiving terminal is connected to the network;
2nd independent monitoring device all has identical structure with the 1st independent monitoring device to N independence monitoring device;
2nd cooperation monitoring device has identical structure to the Ki monitoring device monitoring device that all cooperates with the 1st that cooperates;
2nd aggregation node monitoring device all has identical structure with the 1st aggregation node monitoring device to M aggregation node monitoring device;
Described 1st independent monitoring device is all deployed in monitoring field to Ki cooperation monitoring device and the 1st aggregation node monitoring device to M aggregation node monitoring device, for the discharge of monitoring pollution thing and to data center's transmission of monitoring data to N independence monitoring device, the 1st cooperation monitoring device;
The monitoring point disposed in dispersion is equipped with independent monitoring device, and the monitoring point that dispersion is disposed and other monitoring points are at a distance of more than 500m; 1st independent monitoring device to N independence monitoring device directly by network to data center's transmission of monitoring data;
Be equipped with cooperation monitoring device and aggregation node monitoring device in the monitoring point of dense deployment, the monitoring point of dense deployment and other monitoring points are within 500m; 1st cooperation monitoring device forms sensor network to Ki cooperation monitoring device and the i-th aggregation node monitoring device by ZigBee-network (12), or is connected by CAN (13), transmission field monitoring data; I-th aggregation node monitoring device by wireless sensor network or CAN (13) collect the 1st cooperation monitoring device to Ki cooperate monitoring device Monitoring Data and transmitted to data center by network;
Described data center Internet or the second Ethernet set up server, set up TCP be connected with the 1st independent monitoring device to N independence monitoring device and the 1st aggregation node monitoring device to M aggregation node monitoring device, receive the Monitoring Data uploaded; Then building database, stores Monitoring Data in a database, issues Monitoring Data finally by the first Ethernet;
Described 1st supervision user terminal is supervised user terminal to L and is all received Monitoring Data that data center issues and shown by user interface.
CN201210068910.4A 2012-03-15 2012-03-15 Pollutant discharge monitoring device and system Expired - Fee Related CN102621279B (en)

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