CN204718990U - Wireless water quality monitoring system - Google Patents

Wireless water quality monitoring system Download PDF

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Publication number
CN204718990U
CN204718990U CN201520304713.7U CN201520304713U CN204718990U CN 204718990 U CN204718990 U CN 204718990U CN 201520304713 U CN201520304713 U CN 201520304713U CN 204718990 U CN204718990 U CN 204718990U
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module
water quality
circuit
wireless
quality monitoring
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赵敏华
周创创
李玲燕
葛界锋
胡毅
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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Abstract

Wireless water quality monitoring system, comprise part of data acquisition, tcp data segment and control and management part, wherein: part of data acquisition comprises by for obtaining the sensor group of water temperature, PH and conductivity value and being distributed in the single wireless sensor node of monitored area; Tcp data segment is the Zigbee distributed network formed by each wireless sensor node self-organization described, the data of each wireless sensor node are directly transferred to aggregation node wirelessly, or, be transferred to aggregation node wirelessly by transistroute node; Control and management part is the control and management center receiving described aggregation node transmission data, the built-in communication module communicated with Terminal Server Client in control and management center, send data to Terminal Server Client, wireless sensor network technology is applied to water quality monitoring field by the utility model, in conjunction with ZigBee technology and sensor technology, achieve small-sized wireless water quality monitoring system.

Description

Wireless water quality monitoring system
Technical field
The utility model belongs to water quality monitoring technical field, relates to the detection of greenhouse condition, is specifically related to a kind of wireless water quality monitoring system.
Background technology
Water be the mankind depend on for existence basic, scientific research shows that the mankind can survive when not having food seven days, can only survive in the absence of water three days.Although we life the earth very large area all cover by water, the freshwater resources that people can use only take up an area 0.2% of ball total Water.And along with population expansion and rapid development of economy, water pollutions phenomenon is more and more serious.The data display provided according to Ministry of Water Resources, the river of China 38.6% in 2010 is long is inferior to three class water, the lake eutrophication of 2/3rds.The problem such as water scarcity, water pollutions is day by day serious, and water quality monitoring and the water pollution control work of China are faced with huge challenge.
Water quality monitoring is one of Main Means of water resources management and Environmental capacity, object is to grasp water quality situation and development trend thereof, analyze and judge culprit, harm, for taking Countermeasures for Pollution to provide foundation, also for carrying out evaluation of water resources quality, prediction provides basic data and means.The quality of water quality directly has influence on the production of all trades and professions and the life of the people.The Lanzhou potable water benzene occurred as the beginning of this year exceeds standard event, due to monitoring not in time, make contaminated water source flow into Residents potable water, it is panic to cause society.Therefore, in water quality monitoring, national environmental consciousness not only should be appealed by government, the monitor and forecast ability more should increased water quality, and water quality is supervised can be launched in time, effectively, alleviates the harm that water pollution causes.
Traditional water quality monitoring method is mainly divided into 3 kinds: the mode (1) adopting Portable water quality monitor hand sampling, lab analysis, and sampling frequency is monthly for several times to several every day, is the main method of major river valley section sampling.(2) adopt the water environment automatic monitoring system be made up of a central control room and several monitoring sub-stations, automatic continuous monitoring is carried out to water environment parameter, remote data automatic transmission, can the water quality parameter of website set by real-time query.These two kinds of modes, although the former analysis precision is high, but it is long to there is monitoring periods, labour intensity is large, data acquisition and transmission speed slow, be difficult to find the problems such as burst Pollution situation, although the latter has dynamic reflection water quality situation, measure the advantages such as timely, owing to having cable laying and the construction requirement setting up monitoring sub-station, thus exist original eco-environmental impact is large, system investments cost is high, position, monitoring point is fixed, the shortcomings such as monitoring range is little.(3) adopt remote sensing techniques or the novel water quality monitoring method of aquatic organism determination of activity, remote sensing technology carries out electromagnetic wave spectrum characteristic (radiation, reflection and scattering) detection to water body in a non contact fashion, can only to the turbidity of water body, transparency, concentration of suspension, and phytoplankton (as blue-green algae, diatom etc.) detects, can't detect for the dissolved organic matter in water body, chemically index (as dissolved oxygen DO DO, chemical oxygen demand COD, ammonia nitrogen NH3N etc.); The method of aquatic organism determination of activity has fish to survey method, beach louse survey method and artificial substrate determination method, and this water quality monitoring method precision is lower.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of wireless water quality monitoring system, by disposing wireless sensor node in area to be monitored, Real-Time Monitoring water body parameter information is also wirelessly transmitted to the data server at control and management center, data server makes supervisor can remote monitoring water quality information by Internet technology, wireless water quality monitoring system effectively can make up the shortcoming of conventional art, meet water quality monitoring informationization, the requirement of networking, there is expense simultaneously low, low in energy consumption, reliability is high, the advantage such as easy to use, powerful economic and social benefit can be brought.
To achieve these goals, the technical solution adopted in the utility model is:
Wireless water quality monitoring system, comprises part of data acquisition, tcp data segment and control and management part, wherein:
Part of data acquisition comprises by for obtaining the sensor group of water temperature, PH and conductivity value and being distributed in the single wireless sensor node 3 of monitored area;
Tcp data segment is the Zigbee distributed network formed by each wireless sensor node 3 self-organization described, the data of each wireless sensor node 3 are directly transferred to aggregation node 1 wirelessly, or, be transferred to aggregation node 1 wirelessly by transistroute node 2;
Control and management part is receive the control and management center 5 that described aggregation node 1 transmits data, and the built-in communication module communicated with Terminal Server Client 6 in control and management center 5, sends data to Terminal Server Client 6.
Described wireless sensor node 3 comprises water quality monitoring module, Zigbee module one and power module, described water quality monitoring module comprises sensor interface and signal conditioning circuit, sensor interface is connected with each sensor of sensor group, Monitoring Data is received from described sensor group, signal conditioning circuit carries out analog to digital conversion to the Monitoring Data obtained and amplifies process, Zigbee module one receives and data after storing or outwards send this process, and power module one is powered for water quality monitoring module and Zigbee module one.
Described aggregation node 1 comprises Zigbee module two, peripheral expansion circuit and power module two.
Described Zigbee module one and Zigbee module two all select CC2530F256 chip as master control, Zigbee module one block design is wireless communication module one and telescopic backboard module one, the responsible RF transmitting-receiving of wireless communication module one, comprise clock circuit, antenna and telescopic backboard module one interface circuit, telescopic backboard module one comprises the CC2530 digital I/O port circuit of extraction, emulator connector, power supply and filter-capacitor circuit and reset key circuit; Zigbee module two block design is wireless communication module two and telescopic backboard module two, the responsible RF transmitting-receiving of wireless communication module two, comprise clock circuit, antenna and telescopic backboard module two interface circuit, telescopic backboard module two comprises key circuit, LED display and serial communication circuit.
In described sensor group, adopt DS18B20 digital temperature sensor to obtain water temperature, adopt PH electrode measurement water PH value, adopt bipolar pulse metering circuit to obtain water body conductivity.
Described bipolar pulse metering circuit comprises a two-stage type conductance electrode, and this two-stage type conductance electrode inputs high frequency positive negative pulse stuffing, and the output of this two-stage type conductance electrode obtains the conductivity value of digital form through amplification, rectification and analog to digital conversion.
Described aggregation node 1 is communicated by RS232 serial port module 4 with between control and management center 5.
The utility model compared with prior art, has the following advantages:
(1) wireless sensor network technology is applied to water quality monitoring field, in conjunction with ZigBee technology and sensor technology, achieves small-sized wireless water quality monitoring system.
(2) devise the signal conditioning circuit being applied to pH value, conductivity collection, simplify traditional water quality Acquisition Circuit design.
(3) complete the transplanting of Zigbee protocol stack, application program that amendment is relevant with water quality monitoring system, comprise man-machine interface, the functions such as AD conversion and data transmission.
(4) data gathered by Zigbee protocol are sent in Ethernet ICP/IP protocol mode by control and management Center host computer interface, realize the interconnected of water quality monitoring internal network and the Internet.In addition, devise the client control interface based on Android mobile phone, make water quality monitoring more convenient.
Accompanying drawing explanation
Fig. 1 is system chart of the present utility model.
Fig. 2 is the structured flowchart of the utility model wireless sensor node.
Fig. 3 is the structured flowchart of the utility model aggregation node and routing node.
Fig. 4 is the radio communication circuit figure of the utility model Zigbee module.
Fig. 5 is the telescopic backboard circuit diagram of the utility model wireless sensor node.
Fig. 6 is the utility model PH signal conditioning circuit.
Fig. 7 is the structured flowchart of the utility model bipolar pulse method metering circuit.
Fig. 8 is that the utility model high frequency positive negative pulse stuffing produces circuit diagram.
Fig. 9 is the utility model signal amplification, rectification and filtering circuit figure.
Figure 10 is the utility model aggregation node telescopic backboard circuit figure.
Figure 11 is the utility model aggregation node program flow diagram.
Figure 12 is the utility model sensor node program flow diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further details.
As shown in Figure 1, wireless water quality monitoring system is made up of part of data acquisition, tcp data segment and control and management part etc.Part of data acquisition comprises the sensor group and wireless sensor node 3 that are distributed in monitored area, for obtaining the physical quantity such as temperature, pH value, conductivity of water body.Tcp data segment is the Zigbee distributed network organized themselves into by multiple wireless sensor node 3, the data of each wireless sensor node 3 are directly transferred to aggregation node 1 wirelessly, or, be transferred to aggregation node 1 wirelessly by transistroute node 2.Control and management part is control and management center 5, aggregation node 1 is sent to control and management center 5 by RS232 serial port module 4 after data are carried out fusion treatment again, the built-in communication module communicated with Terminal Server Client 6 in control and management center 5, send data to Terminal Server Client 6, Terminal Server Client 6 can be mobile phone or PAD client computer, communicate with control and management center 5, obtain water quality information.
Wherein, wireless sensor node 3 is responsible for data acquisition and network communication, is the hardware foundation of whole system.The basic structure of wireless sensor node 3 as shown in Figure 2, the water quality monitoring module comprising Zigbee module one, power module one and be made up of sensor interface and signal conditioning circuit.Sensor interface connects the sensors such as temperature, PH, conductivity, and signal conditioning circuit is responsible for carrying out analog to digital conversion and data processing to the data of sensor interface collection; Zigbee module one comprises MCU core, internal memory and wireless communication module, mainly realizes wireless transmission and the reception of this node data, the online process of data and storage; Power module one is the normal operation energy supply of node.
Aggregation node 1 complete Zigbee network foundation, tidal data recovering, with the function such as control and management center 5 communicates, routing node 2 completes reception and the forwarding of wireless data, therefore, aggregation node 1 is comparatively similar to the structure of routing node 2, mainly comprises Zigbee module two, peripheral expansion circuit and power module.As shown in Figure 3.
Control and management center 5, as host computer, is communicated with slave computer aggregation node 1 by RS232 serial port module 4, and communication adopts master-slave mode, is initiated by host computer, and slave computer is replied.Terminal Server Client 6 adopts the wireless water quality monitoring client towards Android mobile phone, is in a LAN (Local Area Network) with control and management center 5, sets up communication by ICP/IP protocol, can the water quality information of real time reaction host computer.
In the application, consider the low-power consumption of water quality monitoring system, microminiaturized application requirement, Zigbee module one and Zigbee module two all select the SOC solution CC2530F256 chip of TI company as master control.Adopt SOC (System On Chip, SOC (system on a chip)) that the cost of whole system can be saved, improve the performance of system.Meanwhile, in CC2530 chip, be integrated with RF transceiver, can the design of peripheral circuits greatly.
Because wireless sensor node 3 and aggregation node 1 all need Zigbee module to communicate, therefore conveniently system debug, during design, by ZigBee module block design, be divided into the wireless communication module and telescopic backboard module of being only responsible for RF transmitting-receiving, in ZigBee module one, wireless communication module only includes the circuit such as clock, antenna, telescopic backboard module interface, as shown in Figure 4.Telescopic backboard module comprises the CC2530 digital I/O port circuit of extraction, emulator connector, power supply and filter-capacitor circuit, reset key circuit etc., as shown in Figure 5.In ZigBee module two, wireless communication module only includes the circuit such as clock, antenna, telescopic backboard module interface, and telescopic backboard module comprises key circuit, LED display and serial communication circuit.Circuit as shown in Figure 10.Serial ports adopts USB to turn serial port circuit.
In the application, water quality detection module completes the Acquire and process of temperature, PH, conductivity.By related sensor, various water quality parameter is sampled, then through signal conditioning circuit be to the voltage signal collected or current signal carry out amplification process, make signal be more applicable to A/D conversion.
Wherein, the DS18B20 digital temperature sensor that temperature sensor adopts Dallas company to release, the scene temperature being suitable for rugged surroundings is measured.DS18B20 sensor is made up of 64 bit flash memories, temperature sensor, Cache and configuration register four parts.The ROM code of each chip is different, and 64 bit data include sequence number and cyclic redundancy check (CRC) code, therefore, can hang multiple DS18B20 carry out multi-point temp and detect in real time according to this mark on unibus.Temperature sensor is the core of DS18B20, the temperature detection of-55 DEG C ~+125 DEG C of scopes can be realized by bus driver, by arranging wherein two of register, the quantification of 9,10,11,12 4 kinds of precision can be realized, comprising 5 bit sign positions, the temperature quantized value resolution that in 4, precision is corresponding is respectively 0.5 DEG C, 0.25 DEG C, 0.125 DEG C and 0.0625 DEG C.After receiving temperature transition order, sensor starts to gather and the temperature converted can represent with the form of the two's complement of sixteen bit tape symbol expansion, be stored in and tell in the first two byte of buffer RAM, wherein front 5 is-symbol positions, when temperature is greater than 0, these 5 is all 0, and precision numerical value being multiplied by conversion bit wide corresponding just can obtain actual temperature value.
Configuration register is for determining the resolution of temperature transition, and temperature inversion is the numerical value of corresponding precision by the resolution that DS18B20 sets according to configuration register, and wherein R0, R1 position is used for arranging 4 kinds of resolution.DS18B20 sensor only needs one-wire interface, and circuit is simple, does not need AD conversion device and other peripheral circuit.The DS18B20 of the TO-92 encapsulation of selecting in design, wherein DQ is digital signal input/output terminal, and GND is power supply ground, and VCC is external power supply input end.When circuit connects, VCC pin is connected with system 3.3V power supply, and DQ pin is connected to the P1.1 mouth of CC2530 and the pull-up resistor of an external 4.7K, makes DS18B20 when memory write operation and temperature A/D conversion, bus has strong pull-up, then measurement result is more reliable.
PH value is the mark of aqueous solution potential of hydrogen, utilizes electrode potential to calculate.The application have selected the E-201-C type PH electrode that Shanghai Precision Scientific Apparatus Co., Ltd produces, this electrode be combined by glass electrode and reference electrode mould shell rechargeable type combination electrode, during measurement, glass electrode is as potential electrode, its head glass ball bulb is made up of special sensitive thin film, only has sensitization to hydrogen ion.Inner mercurous chloride electrode is as reference electrode, and being immersed in PH is in the interior reference solution of 7.When the glass ball bulb of combination electrode immerses detected solution, in detected solution, hydrogen ion and ball electrode steep surface hydration layer and carry out ion-exchange, make to produce potential difference (PD) between glass electrode and reference electrode, and when pH changes, electromotive force between glass electrode and reference electrode also changes thereupon, can be tried to achieve the pH value of corresponding aqueous solution by the electromotive force measuring change.The parameter of the E-201-C type PH electrode adopted is:
1) PH measurement range: (0 ~ 14) PH
2) response time :≤2min (25 DEG C) is used
3) Applicable temperature scope: (0 ~ 60) DEG C
The original signal that PH combination electrode used herein exports is the d. c. voltage signal of-414.12 ~ 414.12mV, and the pH value of fluid to be measured and the electromotive force of generation are inversely proportional to :-59.16mV=1PH, its modulate circuit as shown in Figure 6,
The ADC input voltage carried due to CC2530 is 0 ~ 3V, by regulating variable resistor VR1 to make VO1 be limited in-1.5 ~ 1.5V, regulates VR2 to make VI2=0.75V, so just can make to export VOUT and meet the demands.Relation between VOUT and sensor original input signal VIN calculates by formula (3.1) and formula (3.2).
V O 1 = V IN ( 1 + R 2 + VR 1 R 1 ) - - - ( 3.1 )
V OUT = V I 2 - V O 1 - V I 2 R 4 × R 5 - - - ( 3.2 )
Conductivity is the inverse of resistivity, and characterizing the conductive capability of conductor, is an attribute of material, has nothing to do with conductance cell geometric configuration.Conductivity is larger, and conductive capability is stronger, otherwise then more weak.The unit of conductivity is s/cm.Conductivity can characterize the degree of purity of water indirectly, is the important indicator of water quality monitoring.
The conductivity measurement of aqueous solution is different from metal, can not directly directly measure with universal meter, and aqueous solution also has capacitance characteristic because the composition structure of its complexity has resistance characteristic simultaneously.
Wherein R xfor solution resistance, C xfor electric double layer capacitance, C pfor distributed capacitance.The measuring method of current conductivity mainly contains phase sensitive detection method, bridge method, frequency method, bipolar pulse method etc.Bipolar pulse method adopts high frequency positive negative pulse stuffing as driving source, and due to the charge-discharge characteristic of capacitive element, in high-frequency impulse situation, capacitive element is considered as short circuit process, once by C x, C pbe considered as short circuit, so according to solution resistance characteristic, aqueous solution is complete resistive characteristic under high-frequency symmetrical pulse situation, and positive and negative high-frequency impulse can overcome solution polarization problem completely.
The measurement of the application's conductivity adopts bipolar pulse method.From Such analysis, in high frequency positive negative pulse stuffing excitation situation, solution presents resistance characteristic completely, therefore amplifier, solution resistance, standard feedback resistance can be utilized to form reverse proportional amplifier, solution resistance is changed into the positive negative pulse stuffing signal that resistance is with it corresponding, amplify process by detection again, direct current signal positive negative pulse stuffing signal being converted to corresponding amplitude is sent to AD converter indirect inspection and goes out electrical conductivity of solution.High frequency positive negative pulse stuffing frequency need be selected suitably, frequency is too low can not solve solution polarization problem, and the too high meeting of frequency is difficulty to follow-up signal modulate circuit band, and experiment proves that He Ne laser 20KHZ meets measurement demand.The amplitude of high-frequency symmetrical pulse needs to select suitably equally, and amplitude too conference brings solution polarization problem, and too low meeting is to follow-up detecting circuit cisco unity malfunction, and experiment proves that amplitude selection ± 2V meets and measures requirement.Measuring principle figure as shown in Figure 7.
The two-stage type conductance electrode that conductivity adopts Shanghai Precision Scientific Apparatus Co., Ltd to produce, model is DJS-1C platinum black, its measurement range 2-20000 μ S/cm.According to principle, be divided into two parts during circuit design, one is high frequency positive negative pulse stuffing generation circuit, and two is signal amplification, rectification and filtering circuit.
(1) 20KHZ pulse signal generating circuit
The application adopts basic square wave circuit for generating to produce high frequency positive negative pulse stuffing, and circuit as shown in Figure 8.
Its frequency can use formula (3.3) to calculate.
f PULSE = 1 2 R 1 C × ln ( 1 + 2 R 2 R 3 ) - - - ( 3.3 )
(2) signal amplification, rectification and filtering circuit
Adopt classical accurate full-wave rectifying circuit to align undersuing herein and carry out rectification, as shown in Figure 9.First anti-phase amplification of amplifier, because the existence of diode is so only anti-phase amplification positive half-wave, selects resistance enlargement factor can be set to 2, i.e. the anti-phase amplification of positive half-wave 2 times; Regulating resistance makes the enlargement factor of second amplifier be 1, thus the Signal averaging that exports of the signal that first amplifier is exported and the 2nd amplifier anti-phase, thus can to obtain waveform be positive half square-wave signal entirely, i.e. rectified signal, second amplifier achieves the single order LPF oppositely inputted and carries out filtering to signal, output terminal can obtain the direct current of pulsing, and this overcomes the shortcoming because attrition voltage on diode rectification pipe falls.The alternating voltage at conductance electrode two ends becomes DC voltage (V through current rectifying and wave filtering circuit v), the alternating current in loop is transformed into alternating voltage by amplifier, then becomes DC quantity (V through same current rectifying and wave filtering circuit o), record this logarithm value by A/D sampling, just can calculate the conductivity value γ of solution, calculate with formula (3.4).
γ = K × V O V V + Δ - - - ( 3.4 )
Wherein K is cell constant of conductometric vessel, and Δ is offset.
The application's aggregation node 1 is responsible for configuration and the management of whole network on the one hand as network coordinator, also receive the data that each wireless sensor node 3 is sent on the other hand, computing machine is passed to by serial ports after being carried out converging arrangement, main process device initialize, telegon networking, node add network, wireless data transceiving and process etc., and its flow process as shown in figure 11.
Wireless sensor node 3 has the function of transceiving data, its primary responsibility collection the data of processes sensor interface, and to network coordinator timed sending data.Wireless sensor node 3 does not maintain the task of the structure of network, therefore can sleep or wake up when not needing data acquisition, in view of the function sensor node of park mode can use powered battery.As shown in figure 12 shown in sensor node program circuit, mainly comprise sensor collecting part and network communication part, namely the transmitting-receiving of data, with the part basic simlarity of network coordinator.The initialization of wireless sensor node 3 will be first optimum configurations initial value, then starts to find network and select suitable network to be attached thereto.
In the application, the implementation procedure of ZigBee networking is as follows:
First, according to equipment function in a network, in advance program is woven to device.According to the connection of entire system pictorial diagram, network coordinator is connected with PC by serial ports, for the ease of analyzing the packet content transmitted in the process of establishing of Zigbee network and network, utilizes Packet Sniffer instrument to carry out packet capturing.Packet Sniffer instrument is that TI company releases the Software tool coordinating Zigbee protocol analyser to use, and utilizes Packet Sniffer instrument can be clear that the situation that network packet sends, can Timeliness coverage error data frame.
Set up ZigBee-network after network coordinator powers on, water quality monitoring network device node adds network automatically.When each node adds network, each meshed network pilot lamp all lights, and shows networking success.Packet Sniffer packet capturing is adopted to set up the situation of network.Its display network coordinator (its position, end, IEEE address is FF) creates network, automatically can select a channel, be depicted as 0x014, i.e. 2.405GHz, after networking success, then wait for that the miscellaneous equipment node of water quality monitoring network adds.
The application uses conductivity calibration solution, conductivity pen corrects electrical conductivity measurement circuit, and the conductivity value of two conductivity calibration solutions is respectively 84 μ s/cm and 1413 μ s/cm, and the measurement range of conductivity pen is 0 ~ 9999 μ s/cm.By measuring the KCL solution of 0.001mol/L after calibration, 28.9 DEG C time, recording numerical value be about 142.6 μ S/cm, quite close with theoretical value 146.6 μ S/cm (25 DEG C).
In order to whether the pH value of confirmatory measurement is accurate, the application employs in experiment the complete buffering agent of PH that love builds the production of Degussa (Shanghai) initiating agent company limited, comprise PH be 4.003 Potassium Hydrogen Phthalate, PH be 6.864 mixed phosphate, PH be the borax of 9.182, be mixed with by it correction that standard solution carries out PH metering circuit.Table 1 reflects the feasibility of PH measuring principle.PH value measured by table 1 and theoretical value contrasts
Solution Standard P H Theoretical V OUT Actual measurement V OUT Actual measurement PH
Potassium Hydrogen Phthalate 4.003 0.858V 0.794V 3.705
Mixed phosphate 6.864 1.471V 1.358V 6.337
Borax 9.182 1.968V 1.821V 8.498

Claims (7)

1. wireless water quality monitoring system, is characterized in that, comprises part of data acquisition, tcp data segment and control and management part, wherein:
Part of data acquisition comprises by the sensor group for obtaining water temperature, PH and conductivity value and the single wireless sensor node (3) being distributed in monitored area;
Tcp data segment is the Zigbee distributed network formed by the self-organization of described each wireless sensor node (3), the data of each wireless sensor node (3) are directly transferred to aggregation node (1) wirelessly, or, be transferred to aggregation node (1) wirelessly by transistroute node (2);
Control and management part is the control and management center (5) receiving described aggregation node (1) transmission data, the built-in communication module communicated with Terminal Server Client (6) in control and management center (5), sends data to Terminal Server Client (6).
2. wireless water quality monitoring system according to claim 1, it is characterized in that, described wireless sensor node (3) comprises water quality monitoring module, Zigbee module one and power module, described water quality monitoring module comprises sensor interface and signal conditioning circuit, sensor interface is connected with each sensor of sensor group, Monitoring Data is received from described sensor group, signal conditioning circuit carries out analog to digital conversion to the Monitoring Data obtained and amplifies process, Zigbee module one receives and data after storing or outwards send this process, power module one is powered for water quality monitoring module and Zigbee module one.
3. wireless water quality monitoring system according to claim 2, is characterized in that, described aggregation node (1) comprises Zigbee module two, peripheral expansion circuit and power module two.
4. wireless water quality monitoring system according to claim 3, it is characterized in that, described Zigbee module one and Zigbee module two all select CC2530F256 chip as master control, Zigbee module one block design is wireless communication module one and telescopic backboard module one, the responsible RF transmitting-receiving of wireless communication module one, comprise clock circuit, antenna and telescopic backboard module one interface circuit, telescopic backboard module one comprises the CC2530 digital I/O port circuit of extraction, emulator connector, power supply and filter-capacitor circuit and reset key circuit; Zigbee module two block design is wireless communication module two and telescopic backboard module two, the responsible RF transmitting-receiving of wireless communication module two, comprise clock circuit, antenna and telescopic backboard module two interface circuit, telescopic backboard module two comprises key circuit, LED display and serial communication circuit.
5. wireless water quality monitoring system according to claim 1, it is characterized in that, in described sensor group, adopt DS18B20 digital temperature sensor to obtain water temperature, adopt PH electrode measurement water PH value, adopt bipolar pulse metering circuit to obtain water body conductivity.
6. wireless water quality monitoring system according to claim 5, it is characterized in that, described bipolar pulse metering circuit comprises a two-stage type conductance electrode, this two-stage type conductance electrode inputs high frequency positive negative pulse stuffing, and the output of this two-stage type conductance electrode obtains the conductivity value of digital form through amplification, rectification and analog to digital conversion.
7. wireless water quality monitoring system according to claim 1, is characterized in that, is communicated between described aggregation node (1) with control and management center (5) by RS232 serial port module (4).
CN201520304713.7U 2015-05-12 2015-05-12 Wireless water quality monitoring system Expired - Fee Related CN204718990U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106053545A (en) * 2016-06-17 2016-10-26 天津市龙网科技发展有限公司 Conductivity analyzer system and control method thereof
CN109765272A (en) * 2019-01-31 2019-05-17 沃菲育水科技有限公司 Multifunctional water aquosity detection device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106053545A (en) * 2016-06-17 2016-10-26 天津市龙网科技发展有限公司 Conductivity analyzer system and control method thereof
CN109765272A (en) * 2019-01-31 2019-05-17 沃菲育水科技有限公司 Multifunctional water aquosity detection device

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