CN203101371U

CN203101371U - Drinking water safety monitoring device based on wireless sensor network

Info

Publication number: CN203101371U
Application number: CN 201320100476
Authority: CN
Inventors: 蒋鹏; 柴俊沙; 王英帅
Original assignee: Hangzhou Dianzi University
Current assignee: Hangzhou Dianzi University
Priority date: 2013-03-05
Filing date: 2013-03-05
Publication date: 2013-07-31
Anticipated expiration: 2023-03-05

Abstract

The utility model discloses a drinking water safety monitoring device based on a wireless sensor network and solves the problems in the prior art that the instantaneity is relatively bad, the cost is high, the requirement on a data source is high, and the synchronous monitoring is very difficult to achieve. The drinking water safety monitoring device is characterized in that a processor module controls an analog switch to selectively supply to a ZigBee module, a GPS (Global Position System) module and a sensor module so as to control the working states of the ZigBee module, the GPS module and the sensor module; and the sensor module sends the collected data to a controller, the controller stores the data in an external storage device or sends the data to other device nodes or base stations through the ZigBee module, simultaneously receives commands from the base stations through the ZigBee module, positions the position information of a device through the GPS module and sends the data to the base stations through the ZigBee module. The drinking water safety monitoring device has the advantages that the system cost is low, the monitoring precision is high, the reliability of a monitoring network is high, and the stability is strong.

Description

A kind of drinking water safety monitoring device based on wireless sensor network

Technical field

The utility model belongs to embedded system and technology of Internet of things field, is specifically related to a kind of drinking water safety monitoring device based on wireless sensor network.

Background technology

Water environment is made up of surface water environment and groundwater environment, comprises river, lake, reservoir, ocean, marsh, glacier, wetland, shallow-layer and deep phreatic water etc.The potable water environmentAL safety is directly connected to carrying out in order of people's daily life.Along with China's rapid economy development, water environment pollution increasingly sharpens, therefore, and for the monitoring of the potable water environment link that is absolutely necessary.Because China is vast in territory, potable water environmental monitoring site disperses, and only relies on existing monitoring station and traditional monitoring technology can not satisfy in real time, monitor all sidedly the potable water environment requirement.

Existing domestic and international potable water method of environmental monitoring mainly is divided into four kinds:

The mode of 1) employing artificial sample, lab analysis.The weak point of this method is can't remote real time monitoring, and the labor intensive material resources are bigger.

2) adopt the water environment automatic monitoring system formed by Surveillance center and several monitoring sub-stations to water environment parameter automatic continuous monitoring.This method has cable laying and the construction requirement of setting up a plurality of monitoring sub-stations in advance, exists easy ecologic environment to water body to damage, monitor shortcomings such as the waters is limited in scope, system's cost of investment height.

3) adopt remote sensing techniques and carry out monitoring water environment.The shortcoming of this method is that real-time is relatively poor, the cost height, and technical difficulty is big, and data source is required height, and difficulty is accomplished synchronous monitoring.

4) adopt aquatic organism monitoring water quality technology.Lower, the poor reliability of this method precision can only reflect variation of water qualitatively, can't determine the change of water quality degree.

Summary of the invention

The utility model is a kind of drinking water safety monitoring device based on wireless sensor network that proposes at the deficiency of above-mentioned four kinds of potable water method of environmental monitoring.

The technical solution of the utility model: processor module is chosen as ZigBee module, GPS module, sensor assembly power supply is provided by the control analog switch, thus the duty of control ZigBee module, GPS module, sensor assembly.Sensor assembly sends to controller with the data that collect, controller is as required with data storage memory device or data are sent to other device nodes or base station by the ZigBee module externally, controller is by the order of ZigBee module reception from the base station simultaneously, the positional information that controller comes positioning equipment by the GPS module, and data are sent to the base station by the ZigBee module.

The detectable parameter of the utility model has contained basic parameter (pH value, water temperature, dissolved oxygen DO, electrolytic conductivity, turbidity, salinity) and the heavy metal parameter of stipulating among the water environment quality standard GB3838-2002 (copper, zinc, cadmium, chromium, arsenic, mercury, lead etc.).Detection for the water environment basic parameter; sensor assembly in the utility model is selected M45453 multi-parameter water quality monitoring sensor; this sensor can be measured multiple basic water quality parameter simultaneously; comprise pH value, water temperature, dissolved oxygen DO, electrolytic conductivity, turbidity, salinity etc.; be characterized in that sensor itself can calibrate automatically; thereby obtain reliable water quality parameter, the straight survey that directly pulls the plug behind the locking equipment simultaneously has data protection function.This sensor can be by RS232 and device talk.For the detection of heavy metal parameter, sensor assembly of the present utility model selects to adopt intelligent digitalized sensor assembly, and this module adopts RS-232 interface output, can finish the external command calibration, functions such as auto thermal compensation.But this sensor assembly function singleness can only detect single heavy metal parameter, so need to change the intelligent digitalized sensor assembly model of corresponding heavy metal by current demand.Also designed the I/V change-over circuit in the utility model, in order to expansion, this circuit can be converted to voltage signal with standard 4-20mA current signal, and converts digital signal to by the inner integrated AD converter of processor.

Drinking water safety monitoring system based on wireless sensor network is made up of monitoring water environment center and sensor network subregion two parts.System will monitor the waters and be divided into plurality of sub-regions, make up the sensor network based on the ZigBee wireless technology in subregion.The data basestation of each subregion configuration band ZigBee gateway and GPRS transmission channel, the a plurality of sensor device nodes that are distributed in the ZigBee network in the subregion are carried out data acquisition and status monitoring, and the real time data of subregion is sent to monitoring center by the GPRS wireless network, call for monitoring center.Simultaneously, data basestation is accepted the order from monitoring center, monitors each field apparatus node.The utility model is the monitoring equipment node section, does not comprise base station and monitoring center.

A kind of drinking water safety monitoring device based on wireless sensor network of the utility model comprises power management module, communication module, outer memory module, signal acquisition module and controller module.Wherein, power management module comprises with LM2596S to be the 5V voltage conversion circuit of core and to be the 3.3V voltage conversion circuit of core with LM1117-3.3, communication module comprises RS232 interface, jtag interface, GPS module interface and ZigBee module interface, and the 5V voltage conversion circuit that with LM2596S is core is that the 3.3V voltage conversion circuit of core provides 5V voltage for the GPS module interface in the communication module, signal acquisition module with LM1117-3.3; The 3.3V voltage conversion circuit that with LM1117-3.3 is core provides 3.3V voltage for the jtag interface in controller module, outer memory module, the communication module, RS232 interface and ZigBee module interface.Controller is by the power supply of analog switch control ZigBee module interface and GPS module interface, signal acquisition module is gathered the parameter of potable water environment automatically, and data are sent to controller module, controller is with data storage memory module or data are sent by the ZigBee module interface externally, and controller is accepted the order from the ZigBee module interface simultaneously.Controller positions by the GPS module interface.

The 5V voltage conversion circuit comprises power management chip U1LM2596S, the first polar capacitor C1, the second polar capacitor C2, first inductance L 1 and voltage stabilizing diode D1, the positive pole of the first polar capacitor C1 is connected with the 12V power supply with 1 pin of power management chip U1 LM2596S, the negative pole of the first polar capacitor C1,3 pins of power management chip U1LM2596S, 5 pins of power management chip U1LM2596S, the minus earth of the anode of voltage stabilizing diode D1 and the second polar capacitor C2,4 pins of power management chip U1LM2596S, one end of first inductance L 1, the positive pole of the second polar capacitor C2 is connected with voltage output end VDD5.0.The negative electrode of 2 pins of power management chip U1LM2596S, the other end of first inductance L 1 and voltage stabilizing diode D1 links to each other.

3.3V voltage conversion circuit comprises the first filter capacitor C4, the 3rd polar capacitor C3, power management chip LM1117, quadripolarity capacitor C 5, the second filter capacitor C6 and light emitting diode DS1, the end of the first filter capacitor C4 and VDD5.0 voltage output end, 3 pins of the positive pole of the 3rd polar capacitor C3 and power management chip LM1117 are connected, the negative pole of the other end of the first filter capacitor C4 and the 3rd polar capacitor C3,1 pin of power management chip LM1117, the negative pole of quadripolarity capacitor C 5, the end of the second filter capacitor C6 is connected with the negative electrode of light emitting diode DS1 and ground connection, 2 pins of power management chip LM1117 and the positive pole of quadripolarity capacitor C 5, the other end of the second filter capacitor C6, the anode connection of light emitting diode DS1 also connects the VDD3.3 voltage output end.

5V and 3.3V analog switching circuit comprise the first analog switch U5, second switch diode D2, the 3rd switching diode D3, the 4th switching diode D4, the 5th switching diode D5.8 pins of 7 pins of the first analog switch U5 and the first analog switch U5 are connected and ground connection; 16 pins of the first analog switch U5 are connected with the VDD5.0 voltage output end; 3 pins of the first analog switch U5 are connected with the VDD5.0 voltage output end; 13 pins of the first analog switch U5 are connected with the VDD3.3 voltage output end; 9 pins of the first analog switch U5 link to each other with the P1_0 pin of processor LPC2368; 10 pins of the first analog switch U5 link to each other with the P1_1 pin of processor LPC2368; 6 pins of the first analog switch U5 link to each other with the P1_4 pin of processor LPC2368; 2 pins of the first analog switch U5 link to each other with the anode of second switch diode D2; 5 pins of the first analog switch U5 link to each other with the anode of the 3rd switching diode D3; 14 pins of the first analog switch U5 link to each other with the anode of the 4th switching diode D4; 12 pins of the first analog switch U5 link to each other with the anode of the 5th switching diode D3; The negative electrode of second switch diode D2 is connected with the negative electrode of the 3rd switching diode D3 and links to each other with V-GPS; The negative electrode of the negative electrode of the 4th switching diode D4 and the 5th switching diode D5 is connected and links to each other with V-ZB.

The 5V analog switching circuit comprises that the second analog switch U7, the 6th switching diode D6, minion are closed diode D7, octavo is closed diode D8 and the 9th switching diode D9.8 pins of 7 pins of the second analog switch U7 and the second analog switch U7 are connected and ground connection; 16 pins of the second analog switch U7 are connected with the VDD5.0 voltage output end; 3 pins of the second analog switch U7 are connected with the VDD5.0 voltage output end; 13 pins of the second analog switch U7 are connected with the VDD5.0 voltage output end; 9 pins of the second analog switch U7 link to each other with the P1_10 pin of processor LPC2368; 10 pins of the second analog switch U7 link to each other with the P1_9 pin of processor LPC2368; 6 pins of the second analog switch U7 link to each other with the P1_8 pin of processor LPC2368; 2 pins of the second analog switch U7 link to each other with the anode of the 6th switching diode D6; 5 pins of the second analog switch U7 link to each other with the anode that minion is closed diode D7; 14 pins of the second analog switch U7 link to each other with the anode that octavo is closed diode D8; 12 pins of the second analog switch U7 link to each other with the anode of the 9th switching diode D9; The negative electrode of the negative electrode of the 6th switching diode D6 and minion pass diode D7 is connected and links to each other with VDD5-2; The negative electrode of octavo pass diode D8 and the negative electrode of the 9th switching diode D9 are connected and link to each other with VDD5-1.

Communication module comprises jtag interface circuit, serial communication level shifting circuit and connector;

Described jtag interface circuit comprises the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and jtag interface CON1, an end of an end of 1 pin among the jtag interface CON1,2 pins, the 3rd resistance R 3, an end of the 4th resistance R 4, the 5th resistance R 5, an end of the 6th resistance R 6, an end of the 7th resistance R 7 link to each other with VDD3.3; 4 pins among the jtag interface CON1 link to each other with an end of the 7th resistance R 7; The other end of 3 pins among the jtag interface CON1, the other end of the 6th resistance R 6, the 7th resistance R 7 links to each other with the nTRST pin of processor LPC2368; 5 pins among the jtag interface CON1, the other end of the 5th resistance R 5 link to each other with the TDI pin of processor LPC2368; 7 pins among the jtag interface CON1, the other end of the 4th resistance R 4 link to each other with the TMS pin of processor LPC2368; 9 pins among the jtag interface CON1, the other end of the 3rd resistance R 3 link to each other with the TCK pin of processor LPC2368; 6 pins among the jtag interface CON1 link to each other with the TDO pin of processor LPC2368; 8 pins among the jtag interface CON1 link to each other and ground connection with 10 pins among the JTAG.

The serial communication level shifting circuit comprises the 4th filter capacitor C8, the 5th filter capacitor C9, the 6th filter capacitor C10, the 7th filter capacitor C11 and serial communication electric level interface conversion chip U3 MAX3232; 16 pins of serial communication electric level interface conversion chip U3 MAX3232 link to each other with VDD3.3; 1 pin of U3 MAX3232 links to each other with the end of the 4th filter capacitor C8; 3 pins of U3 MAX3232 link to each other with the other end of the 4th filter capacitor C8; 4 pins of U3 MAX3232 link to each other with the end of the 7th filter capacitor C11; 5 pins of U3 MAX3232 link to each other with the other end of the 7th filter capacitor C11; 11 pins of U3 MAX3232 link to each other with the P0_2 pin of processor LPC2368; 12 pins of U3 MAX3232 link to each other with the P0_3 pin of processor LPC2368; 10 pins of U3 MAX3232 link to each other with the P0_10 pin of processor LPC2368; 9 pins of U3 MAX3232 link to each other with the P0_11 pin of processor LPC2368; 2 pins of U3 MAX3232 link to each other with the end of the 6th filter capacitor C10; 6 pins of U3 MAX3232 link to each other with the end of the 5th filter capacitor C9; 15 pins of U3 MAX3232 link to each other with the other end of the other end of the 5th filter capacitor C9, the 6th filter capacitor C10 and ground connection; 14 pins of U3 MAX3232 link to each other with 2 pins of serial ports COM1; 13 pins of U3 MAX3232 link to each other with 3 pins of serial ports COM1; 7 pins of U3 MAX3232 link to each other with 2 pins of serial ports COM2; 8 pins of U3 MAX3232 link to each other with 3 pins of serial ports COM2.The 5 pin ground connection of serial ports COM1, the 5 pin ground connection of serial ports COM2, all the other pins of serial ports COM1 and serial ports COM2 are all built on stilts.

The described connector circuit of GP1E electric level interface comprises GPS interface J1 and ZigBee interface JP1, the 1 pin ground connection of GPS interface J1, and 2 pins of GPS interface J1 link to each other with the P4_28 pin of processor LPC2368; 3 pins of GPS interface J1 link to each other with the P4_29 pin of processor LPC2368; 4 pins of GPS interface J1 link to each other with V-GPS, 5 pin of GPS interface J1,6 foot rest skies.13 pins of ZigBee interface JP1 link to each other with V-ZB; 15 pins of ZigBee interface JP1 link to each other with V-ZB; 17 pins of ZigBee interface JP1 link to each other with V-ZB; 21 pins of ZigBee interface JP1,23 pins, 25 pins, 27 pins link to each other and ground connection; 18 pins of ZigBee interface JP1 link to each other with the P2_0 pin of processor LPC2368; 20 pins of ZigBee interface JP1 link to each other with the P2_1 pin of processor LPC2368, and all the other pins of ZigBee interface JP1 are built on stilts.

Outer memory module comprises first resistance R 1, second resistance R 2,32Mb storer SST25VF032 U4 and the 3rd filter capacitor C7,1 pin of 32Mb storer SST25VF032 U4 links to each other with the P0_16 pin of processor LPC2368,2 pins of 32Mb storer SST25VF032 U4 link to each other with the P0_17 pin of processor LPC2368,5 pins of 32Mb storer SST25VF032 U4 link to each other with the P0_18 pin of processor LPC2368,6 pins of 32Mb storer SST25VF032 U4 link to each other with the P0_15 pin of processor LPC2368,3 pins of 32Mb storer SST25VF032 U4, the P0_25 pin of processor LPC2368 links to each other with an end of second resistance R 2, another termination VDD3.3 of second resistance R 2; The 4 pin ground connection of 32Mb storer SST25VF032 U4, the termination VDD3.3 of 8 pins of 32Mb storer SST25VF032 U4, an end of first resistance R 1 and the 3rd filter capacitor C7, the other end ground connection of the 3rd filter capacitor C7,7 pins of 32Mb storer SST25VF032 U4 are connected with first resistance R, 1 other end.

Signal acquisition module comprises sensor interface P1, operational amplifier U6A LM324, the 8th resistance R 8, the 9th resistance R 9, the 8th filter capacitor C12.3 pins of sensor interface P1 meet VDD5-1; The 1 pin ground connection of sensor interface P1; One end of 2 pins of sensor interface P1, the 9th resistance R 9 links to each other with an end of the 8th resistance R 8; The end of the other end of the 8th resistance R 8, the 8th filter capacitor C12 links to each other with 3 pins of operational amplifier U6ALM324; The 9th resistance R 9 other ends link to each other with the other end of the 8th filter capacitor C12 and ground connection; 2 pins of operational amplifier U6ALM324 link to each other with 1 pin of operational amplifier U6ALM324 and link to each other with the P1_31 pin of processor LPC2368; The 4 pin power vd D5.0 of operational amplifier U6ALM324; The 11 pin ground connection of operational amplifier U6ALM324.

Controller module is microprocessor LPC2368, and 12 pins of LPC2368,10 pins, 84 pins, 42 pins, 13 pins, 96 pins, 71 pins, 54 pins, 28 pins meet VDD3.3; 11 pins, 83 pins, 97 pins, 72 pins, 55 pins, 41 pins, 31 pins, 15 pin ground connection, the pin the pin of mentioning in literary composition is all built on stilts.

The beneficial effects of the utility model:

1 system cost is low: with respect to existing water environment automatic monitoring system and artificial sample lab analysis method, equipment and artificial expense reduce greatly.

It is convenient that 2 monitoring networks are disposed, little to the water ecological setting influence: the construction that need not to carry out cable laying He set up monitoring sub-station, and will be little to the influence of water ecological setting.

The collection of water quality parameter more than 3, the monitoring accuracy height: each equipment can the multiple water quality parameter of integrated different sensor senses, according to the difference of monitoring requirements, can increase and changes different sensors, to satisfy different monitoring needs.

4 monitoring network reliability height, adaptability is strong: wireless sensor network adopts wireless transmission, after certain device node breaks down, wireless sensor network is automatic network-building again, can not influence the work of whole network because of the fault of individual device node, improve the reliability of monitoring system.

Description of drawings:

Fig. 1 is monitoring system general frame figure of the present utility model;

Fig. 2 is a hardware configuration synoptic diagram of the present utility model;

Fig. 3 is a 5V voltage conversion circuit schematic diagram of the present utility model;

Fig. 4 is a 3.3V voltage conversion circuit schematic diagram of the present utility model;

Fig. 5 (a) is 5V of the present utility model and 3.3V analog switching circuit schematic diagram;

Fig. 5 (b) is a 5V analog switching circuit schematic diagram of the present utility model;

Fig. 6 (a) is the jtag interface circuit theory diagrams in the communication module circuit;

Fig. 6 (b) is the serial communication level shifting circuit schematic diagram in the communication module circuit;

Fig. 6 (c) is the connector schematic diagram in the communication module circuit;

Fig. 7 is outer memory module circuit theory diagrams of the present utility model;

Fig. 8 is signal acquisition module circuit theory diagrams of the present utility model;

Fig. 9 is a controller module schematic diagram of the present utility model.

Embodiment

Below in conjunction with accompanying drawing each module in the utility model is done specific description.

As shown in Figure 1, whole monitoring system is made up of monitoring water environment center and sensor network subregion two parts.System will monitor the waters and be divided into plurality of sub-regions, make up the sensor network based on the ZigBee wireless technology in subregion.The data basestation of each subregion configuration band ZigBee gateway and GPRS transmission channel, the a plurality of sensor device nodes that are distributed in the ZigBee network in the subregion are carried out data acquisition and status monitoring, and the real time data of subregion is sent to monitoring center by the GPRS wireless network, call for monitoring center.Simultaneously, data basestation is accepted the order from monitoring center, monitors each field apparatus node.The utility model is the monitoring equipment node section, does not comprise base station and monitoring center.

As shown in Figure 2, the utility model comprises power management module 1, communication module 2, outer memory module 3, signal acquisition module 4 and controller module 5.Each module all adopts existing mature technology, wherein, power management module 1 comprises with LM2596S to be the 5V voltage conversion circuit 1-2 of core and to be the 3.3V voltage conversion circuit 1-1 of core with LM1117-3.3, communication module 2 comprises RS232 interface 2-1, jtag interface 2-2, GPS module interface 2-3 and ZigBee module interface 2-4, and the 5V voltage conversion circuit 1-2 that with LM2596S is core is that the 3.3V voltage conversion circuit 1-1 of core provides 5V voltage for the GPS module interface 2-3 in the communication module 2, signal acquisition module 4 with LM1117-3.3; The 3.3V voltage conversion circuit 1-1 that with LM1117-3.3 is core provides 3.3V voltage for the jtag interface 2-2 in controller module 5, outer memory module 3, the communication module 2, RS232 interface 2-1 and ZigBee module interface 2-4.Controller 5 is by the power supply of analog switch control ZigBee module interface 2-4 and GPS module interface 2-3, signal acquisition module 4 is gathered the parameter of potable water environment automatically, and data are sent to controller module 5, controller 5 is data storage memory module 3 or data are sent by ZigBee module interface 2-4 externally, the order accepted from ZigBee module interface 2-4 of controller 5 simultaneously.Controller 5 positions by GPS module interface 2-3.

As shown in Figure 3, the 5V voltage conversion circuit comprises power management chip U1LM2596S, the first polar capacitor C1, the second polar capacitor C2, first inductance L 1 and voltage stabilizing diode D1, the positive pole of the first polar capacitor C1 is connected with the 12V power supply with 1 pin of power management chip U1 LM2596S, the negative pole of the first polar capacitor C1,3 pins of power management chip U1LM2596S, 5 pins of power management chip U1LM2596S, the minus earth of the anode of voltage stabilizing diode D1 and the second polar capacitor C2,4 pins of power management chip U1LM2596S, one end of first inductance L 1, the positive pole of the second polar capacitor C2 is connected with voltage output end VDD5.0.The negative electrode of 2 pins of power management chip U1LM2596S, the other end of first inductance L 1 and voltage stabilizing diode D1 links to each other.

As shown in Figure 4,3.3V voltage conversion circuit comprises the first filter capacitor C4, the 3rd polar capacitor C3, power management chip LM1117, quadripolarity capacitor C 5, the second filter capacitor C6 and light emitting diode DS1, the end of the first filter capacitor C4 and VDD5.0 voltage output end, 3 pins of the positive pole of the 3rd polar capacitor C3 and power management chip LM1117 are connected, the negative pole of the other end of the first filter capacitor C4 and the 3rd polar capacitor C3,1 pin of power management chip LM1117, the negative pole of quadripolarity capacitor C 5, the end of the second filter capacitor C6 is connected with the negative electrode of light emitting diode DS1 and ground connection, 2 pins of power management chip LM1117 and the positive pole of quadripolarity capacitor C 5, the other end of the second filter capacitor C6, the anode connection of light emitting diode DS1 also connects the VDD3.3 voltage output end.

Shown in Fig. 5 (a), 5V and 3.3V analog switching circuit comprise the first analog switch U5, second switch diode D2, the 3rd switching diode D3, the 4th switching diode D4, the 5th switching diode D5.8 pins of 7 pins of the first analog switch U5 and the first analog switch U5 are connected and ground connection; 16 pins of the first analog switch U5 are connected with the VDD5.0 voltage output end; 3 pins of the first analog switch U5 are connected with the VDD5.0 voltage output end; 13 pins of the first analog switch U5 are connected with the VDD3.3 voltage output end; 9 pins of the first analog switch U5 link to each other with the P1_0 pin of processor LPC2368; 10 pins of the first analog switch U5 link to each other with the P1_1 pin of processor LPC2368; 6 pins of the first analog switch U5 link to each other with the P1_4 pin of processor LPC2368; 2 pins of the first analog switch U5 link to each other with the anode of second switch diode D2; 5 pins of the first analog switch U5 link to each other with the anode of the 3rd switching diode D3; 14 pins of the first analog switch U5 link to each other with the anode of the 4th switching diode D4; 12 pins of the first analog switch U5 link to each other with the anode of the 5th switching diode D3; The negative electrode of second switch diode D2 is connected with the negative electrode of the 3rd switching diode D3 and links to each other with V-GPS; The negative electrode of the negative electrode of the 4th switching diode D4 and the 5th switching diode D5 is connected and links to each other with V-ZB.

Shown in Fig. 5 (b), the 5V analog switching circuit comprises that the second analog switch U7, the 6th switching diode D6, minion are closed diode D7, octavo is closed diode D8 and the 9th switching diode D9.8 pins of 7 pins of the second analog switch U7 and the second analog switch U7 are connected and ground connection; 16 pins of the second analog switch U7 are connected with the VDD5.0 voltage output end; 3 pins of the second analog switch U7 are connected with the VDD5.0 voltage output end; 13 pins of the second analog switch U7 are connected with the VDD5.0 voltage output end; 9 pins of the second analog switch U7 link to each other with the P1_10 pin of processor LPC2368; 10 pins of the second analog switch U7 link to each other with the P1_9 pin of processor LPC2368; 6 pins of the second analog switch U7 link to each other with the P1_8 pin of processor LPC2368; 2 pins of the second analog switch U7 link to each other with the anode of the 6th switching diode D6; 5 pins of the second analog switch U7 link to each other with the anode that minion is closed diode D7; 14 pins of the second analog switch U7 link to each other with the anode that octavo is closed diode D8; 12 pins of the second analog switch U7 link to each other with the anode of the 9th switching diode D9; The negative electrode of the negative electrode of the 6th switching diode D6 and minion pass diode D7 is connected and links to each other with VDD5-2; The negative electrode of octavo pass diode D8 and the negative electrode of the 9th switching diode D9 are connected and link to each other with VDD5-1.

Communication module comprises jtag interface circuit, serial communication level shifting circuit and connector.

Shown in Fig. 6 (a), described jtag interface circuit comprises the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and jtag interface CON1, an end of an end of 1 pin among the jtag interface CON1,2 pins, the 3rd resistance R 3, an end of the 4th resistance R 4, the 5th resistance R 5, an end of the 6th resistance R 6, an end of the 7th resistance R 7 link to each other with VDD3.3; 4 pins among the jtag interface CON1 link to each other with an end of the 7th resistance R 7; The other end of 3 pins among the jtag interface CON1, the other end of the 6th resistance R 6, the 7th resistance R 7 links to each other with the nTRST pin of processor LPC2368; 5 pins among the jtag interface CON1, the other end of the 5th resistance R 5 link to each other with the TDI pin of processor LPC2368; 7 pins among the jtag interface CON1, the other end of the 4th resistance R 4 link to each other with the TMS pin of processor LPC2368; 9 pins among the jtag interface CON1, the other end of the 3rd resistance R 3 link to each other with the TCK pin of processor LPC2368; 6 pins among the jtag interface CON1 link to each other with the TDO pin of processor LPC2368; 8 pins among the jtag interface CON1 link to each other and ground connection with 10 pins among the JTAG.

Shown in Fig. 6 (b), the serial communication level shifting circuit comprises the 4th filter capacitor C8, the 5th filter capacitor C9, the 6th filter capacitor C10, the 7th filter capacitor C11 and serial communication electric level interface conversion chip U3 MAX3232; 16 pins of serial communication electric level interface conversion chip U3 MAX3232 link to each other with VDD3.3; 1 pin of U3 MAX3232 links to each other with the end of the 4th filter capacitor C8; 3 pins of U3 MAX3232 link to each other with the other end of the 4th filter capacitor C8; 4 pins of U3 MAX3232 link to each other with the end of the 7th filter capacitor C11; 5 pins of U3 MAX3232 link to each other with the other end of the 7th filter capacitor C11; 11 pins of U3 MAX3232 link to each other with the P0_2 pin of processor LPC2368; 12 pins of U3 MAX3232 link to each other with the P0_3 pin of processor LPC2368; 10 pins of U3 MAX3232 link to each other with the P0_10 pin of processor LPC2368; 9 pins of U3 MAX3232 link to each other with the P0_11 pin of processor LPC2368; 2 pins of U3 MAX3232 link to each other with the end of the 6th filter capacitor C10; 6 pins of U3 MAX3232 link to each other with the end of the 5th filter capacitor C9; 15 pins of U3 MAX3232 link to each other with the other end of the other end of the 5th filter capacitor C9, the 6th filter capacitor C10 and ground connection; 14 pins of U3 MAX3232 link to each other with 2 pins of serial ports COM1; 13 pins of U3 MAX3232 link to each other with 3 pins of serial ports COM1; 7 pins of U3 MAX3232 link to each other with 2 pins of serial ports COM2; 8 pins of U3 MAX3232 link to each other with 3 pins of serial ports COM2.The 5 pin ground connection of serial ports COM1, the 5 pin ground connection of serial ports COM2, all the other pins of serial ports COM1 and serial ports COM2 are all built on stilts.

Shown in Fig. 6 (c), the described connector circuit of GP1E electric level interface comprises GPS interface J1 and ZigBee interface JP1, the 1 pin ground connection of GPS interface J1, and 2 pins of GPS interface J1 link to each other with the P4_28 pin of processor LPC2368; 3 pins of GPS interface J1 link to each other with the P4_29 pin of processor LPC2368; 4 pins of GPS interface J1 link to each other with V-GPS, 5 pin of GPS interface J1,6 foot rest skies.13 pins of ZigBee interface JP1 link to each other with V-ZB; 15 pins of ZigBee interface JP1 link to each other with V-ZB; 17 pins of ZigBee interface JP1 link to each other with V-ZB; 21 pins of ZigBee interface JP1,23 pins, 25 pins, 27 pins link to each other and ground connection; 18 pins of ZigBee interface JP1 link to each other with the P2_0 pin of processor LPC2368; 20 pins of ZigBee interface JP1 link to each other with the P2_1 pin of processor LPC2368, and all the other pins of ZigBee interface JP1 are built on stilts.

As shown in Figure 7, outer memory module comprises first resistance R 1, second resistance R 2,32Mb storer SST25VF032 U4 and the 3rd filter capacitor C7,1 pin of 32Mb storer SST25VF032 U4 links to each other with the P0_16 pin of processor LPC2368,2 pins of 32Mb storer SST25VF032 U4 link to each other with the P0_17 pin of processor LPC2368,5 pins of 32Mb storer SST25VF032 U4 link to each other with the P0_18 pin of processor LPC2368,6 pins of 32Mb storer SST25VF032 U4 link to each other with the P0_15 pin of processor LPC2368,3 pins of 32Mb storer SST25VF032 U4, the P0_25 pin of processor LPC2368 links to each other with an end of second resistance R 2, another termination VDD3.3 of second resistance R 2; The 4 pin ground connection of 32Mb storer SST25VF032 U4, the termination VDD3.3 of 8 pins of 32Mb storer SST25VF032 U4, an end of first resistance R 1 and the 3rd filter capacitor C7, the other end ground connection of the 3rd filter capacitor C7,7 pins of 32Mb storer SST25VF032 U4 are connected with first resistance R, 1 other end.

As shown in Figure 8, signal acquisition module comprises sensor interface P1, operational amplifier U6A LM324, the 8th resistance R 8, the 9th resistance R 9, the 8th filter capacitor C12.3 pins of sensor interface P1 meet VDD5-1; The 1 pin ground connection of sensor interface P1; One end of 2 pins of sensor interface P1, the 9th resistance R 9 links to each other with an end of the 8th resistance R 8; The end of the other end of the 8th resistance R 8, the 8th filter capacitor C12 links to each other with 3 pins of operational amplifier U6ALM324; The 9th resistance R 9 other ends link to each other with the other end of the 8th filter capacitor C12 and ground connection; 2 pins of operational amplifier U6ALM324 link to each other with 1 pin of operational amplifier U6ALM324 and link to each other with the P1_31 pin of processor LPC2368; The 4 pin power vd D5.0 of operational amplifier U6ALM324; The 11 pin ground connection of operational amplifier U6ALM324.

As shown in Figure 9, controller module is microprocessor LPC2368, and 12 pins of LPC2368,10 pins, 84 pins, 42 pins, 13 pins, 96 pins, 71 pins, 54 pins, 28 pins meet VDD3.3; 11 pins, 83 pins, 97 pins, 72 pins, 55 pins, 41 pins, 31 pins, 15 pin ground connection, the pin the pin of mentioning in literary composition is all built on stilts.

The course of work of drinking water safety monitoring equipment is as follows: processor module control analog switch, whether select for ZigBee module, GPS module, sensor assembly provide power supply, thus the duty of control ZigBee module, GPS module, sensor assembly.Sensor assembly sends to controller with the data that collect, controller is as required with data storage memory device or data are sent to other device nodes or base station by the ZigBee module externally, controller is by the order of ZigBee module reception from the base station simultaneously, the positional information that controller comes positioning equipment by the GPS module, and data are sent to the base station by the ZigBee module.

Claims

1. the drinking water safety monitoring device based on wireless sensor network comprises power management module, communication module, outer memory module, signal acquisition module and controller module; It is characterized in that: power management module comprises with LM2596S to be the 5V voltage conversion circuit of core and to be the 3.3V voltage conversion circuit of core with LM1117-3.3, communication module comprises RS232 interface, jtag interface, GPS module interface and ZigBee module interface, and the 5V voltage conversion circuit that with LM2596S is core is that the 3.3V voltage conversion circuit of core provides 5V voltage for the GPS module interface in the communication module, signal acquisition module with LM1117-3.3; The 3.3V voltage conversion circuit that with LM1117-3.3 is core provides 3.3V voltage for the jtag interface in controller module, outer memory module, the communication module, RS232 interface and ZigBee module interface; Controller is by the power supply of analog switch control ZigBee module interface and GPS module interface, signal acquisition module is gathered the parameter of potable water environment automatically, and data are sent to controller module, controller is with data storage memory module or data are sent by the ZigBee module interface externally, and controller is accepted the order from the ZigBee module interface simultaneously; Controller positions by the GPS module interface;

The 5V voltage conversion circuit comprises power management chip U1LM2596S, the first polar capacitor C1, the second polar capacitor C2, first inductance L 1 and voltage stabilizing diode D1, the positive pole of the first polar capacitor C1 is connected with the 12V power supply with 1 pin of power management chip U1 LM2596S, the negative pole of the first polar capacitor C1,3 pins of power management chip U1LM2596S, 5 pins of power management chip U1LM2596S, the minus earth of the anode of voltage stabilizing diode D1 and the second polar capacitor C2,4 pins of power management chip U1LM2596S, one end of first inductance L 1, the positive pole of the second polar capacitor C2 is connected with voltage output end VDD5.0; The negative electrode of 2 pins of power management chip U1LM2596S, the other end of first inductance L 1 and voltage stabilizing diode D1 links to each other;

3.3V voltage conversion circuit comprises the first filter capacitor C4, the 3rd polar capacitor C3, power management chip LM1117, quadripolarity capacitor C 5, the second filter capacitor C6 and light emitting diode DS1, the end of the first filter capacitor C4 and VDD5.0 voltage output end, 3 pins of the positive pole of the 3rd polar capacitor C3 and power management chip LM1117 are connected, the negative pole of the other end of the first filter capacitor C4 and the 3rd polar capacitor C3,1 pin of power management chip LM1117, the negative pole of quadripolarity capacitor C 5, the end of the second filter capacitor C6 is connected with the negative electrode of light emitting diode DS1 and ground connection, 2 pins of power management chip LM1117 and the positive pole of quadripolarity capacitor C 5, the other end of the second filter capacitor C6, the anode connection of light emitting diode DS1 also connects the VDD3.3 voltage output end;

5V and 3.3V analog switching circuit comprise the first analog switch U5, second switch diode D2, the 3rd switching diode D3, the 4th switching diode D4, the 5th switching diode D5; 8 pins of 7 pins of the first analog switch U5 and the first analog switch U5 are connected and ground connection; 16 pins of the first analog switch U5 are connected with the VDD5.0 voltage output end; 3 pins of the first analog switch U5 are connected with the VDD5.0 voltage output end; 13 pins of the first analog switch U5 are connected with the VDD3.3 voltage output end; 9 pins of the first analog switch U5 link to each other with the P1_0 pin of processor LPC2368; 10 pins of the first analog switch U5 link to each other with the P1_1 pin of processor LPC2368; 6 pins of the first analog switch U5 link to each other with the P1_4 pin of processor LPC2368; 2 pins of the first analog switch U5 link to each other with the anode of second switch diode D2; 5 pins of the first analog switch U5 link to each other with the anode of the 3rd switching diode D3; 14 pins of the first analog switch U5 link to each other with the anode of the 4th switching diode D4; 12 pins of the first analog switch U5 link to each other with the anode of the 5th switching diode D3; The negative electrode of second switch diode D2 is connected with the negative electrode of the 3rd switching diode D3 and links to each other with V-GPS; The negative electrode of the negative electrode of the 4th switching diode D4 and the 5th switching diode D5 is connected and links to each other with V-ZB;

The 5V analog switching circuit comprises that the second analog switch U7, the 6th switching diode D6, minion are closed diode D7, octavo is closed diode D8 and the 9th switching diode D9; 8 pins of 7 pins of the second analog switch U7 and the second analog switch U7 are connected and ground connection; 16 pins of the second analog switch U7 are connected with the VDD5.0 voltage output end; 3 pins of the second analog switch U7 are connected with the VDD5.0 voltage output end; 13 pins of the second analog switch U7 are connected with the VDD5.0 voltage output end; 9 pins of the second analog switch U7 link to each other with the P1_10 pin of processor LPC2368; 10 pins of the second analog switch U7 link to each other with the P1_9 pin of processor LPC2368; 6 pins of the second analog switch U7 link to each other with the P1_8 pin of processor LPC2368; 2 pins of the second analog switch U7 link to each other with the anode of the 6th switching diode D6; 5 pins of the second analog switch U7 link to each other with the anode that minion is closed diode D7; 14 pins of the second analog switch U7 link to each other with the anode that octavo is closed diode D8; 12 pins of the second analog switch U7 link to each other with the anode of the 9th switching diode D9; The negative electrode of the negative electrode of the 6th switching diode D6 and minion pass diode D7 is connected and links to each other with VDD5-2; The negative electrode of octavo pass diode D8 and the negative electrode of the 9th switching diode D9 are connected and link to each other with VDD5-1;

Described jtag interface circuit comprises the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and jtag interface CON1, an end of an end of 1 pin among the jtag interface CON1,2 pins, the 3rd resistance R 3, an end of the 4th resistance R 4, the 5th resistance R 5, an end of the 6th resistance R 6, an end of the 7th resistance R 7 link to each other with VDD3.3; 4 pins among the jtag interface CON1 link to each other with an end of the 7th resistance R 7; The other end of 3 pins among the jtag interface CON1, the other end of the 6th resistance R 6, the 7th resistance R 7 links to each other with the nTRST pin of processor LPC2368; 5 pins among the jtag interface CON1, the other end of the 5th resistance R 5 link to each other with the TDI pin of processor LPC2368; 7 pins among the jtag interface CON1, the other end of the 4th resistance R 4 link to each other with the TMS pin of processor LPC2368; 9 pins among the jtag interface CON1, the other end of the 3rd resistance R 3 link to each other with the TCK pin of processor LPC2368; 6 pins among the jtag interface CON1 link to each other with the TDO pin of processor LPC2368; 8 pins among the jtag interface CON1 link to each other and ground connection with 10 pins among the JTAG;

The serial communication level shifting circuit comprises the 4th filter capacitor C8, the 5th filter capacitor C9, the 6th filter capacitor C10, the 7th filter capacitor C11 and serial communication electric level interface conversion chip U3 MAX3232; 16 pins of serial communication electric level interface conversion chip U3 MAX3232 link to each other with VDD3.3; 1 pin of U3 MAX3232 links to each other with the end of the 4th filter capacitor C8; 3 pins of U3 MAX3232 link to each other with the other end of the 4th filter capacitor C8; 4 pins of U3 MAX3232 link to each other with the end of the 7th filter capacitor C11; 5 pins of U3 MAX3232 link to each other with the other end of the 7th filter capacitor C11; 11 pins of U3 MAX3232 link to each other with the P0_2 pin of processor LPC2368; 12 pins of U3 MAX3232 link to each other with the P0_3 pin of processor LPC2368; 10 pins of U3 MAX3232 link to each other with the P0_10 pin of processor LPC2368; 9 pins of U3 MAX3232 link to each other with the P0_11 pin of processor LPC2368; 2 pins of U3 MAX3232 link to each other with the end of the 6th filter capacitor C10; 6 pins of U3 MAX3232 link to each other with the end of the 5th filter capacitor C9; 15 pins of U3 MAX3232 link to each other with the other end of the other end of the 5th filter capacitor C9, the 6th filter capacitor C10 and ground connection; 14 pins of U3 MAX3232 link to each other with 2 pins of serial ports COM1; 13 pins of U3 MAX3232 link to each other with 3 pins of serial ports COM1; 7 pins of U3 MAX3232 link to each other with 2 pins of serial ports COM2; 8 pins of U3 MAX3232 link to each other with 3 pins of serial ports COM2; The 5 pin ground connection of serial ports COM1, the 5 pin ground connection of serial ports COM2, all the other pins of serial ports COM1 and serial ports COM2 are all built on stilts;

The described connector circuit of GP1E electric level interface comprises GPS interface J1 and ZigBee interface JP1, the 1 pin ground connection of GPS interface J1, and 2 pins of GPS interface J1 link to each other with the P4_28 pin of processor LPC2368; 3 pins of GPS interface J1 link to each other with the P4_29 pin of processor LPC2368; 4 pins of GPS interface J1 link to each other with V-GPS, 5 pin of GPS interface J1,6 foot rest skies; 13 pins of ZigBee interface JP1 link to each other with V-ZB; 15 pins of ZigBee interface JP1 link to each other with V-ZB; 17 pins of ZigBee interface JP1 link to each other with V-ZB; 21 pins of ZigBee interface JP1,23 pins, 25 pins, 27 pins link to each other and ground connection; 18 pins of ZigBee interface JP1 link to each other with the P2_0 pin of processor LPC2368; 20 pins of ZigBee interface JP1 link to each other with the P2_1 pin of processor LPC2368, and all the other pins of ZigBee interface JP1 are built on stilts;

Outer memory module comprises first resistance R 1, second resistance R 2,32Mb storer SST25VF032 U4 and the 3rd filter capacitor C7,1 pin of 32Mb storer SST25VF032 U4 links to each other with the P0_16 pin of processor LPC2368,2 pins of 32Mb storer SST25VF032 U4 link to each other with the P0_17 pin of processor LPC2368,5 pins of 32Mb storer SST25VF032 U4 link to each other with the P0_18 pin of processor LPC2368,6 pins of 32Mb storer SST25VF032 U4 link to each other with the P0_15 pin of processor LPC2368,3 pins of 32Mb storer SST25VF032 U4, the P0_25 pin of processor LPC2368 links to each other with an end of second resistance R 2, another termination VDD3.3 of second resistance R 2; The 4 pin ground connection of 32Mb storer SST25VF032 U4, the termination VDD3.3 of 8 pins of 32Mb storer SST25VF032 U4, an end of first resistance R 1 and the 3rd filter capacitor C7, the other end ground connection of the 3rd filter capacitor C7,7 pins of 32Mb storer SST25VF032 U4 are connected with first resistance R, 1 other end;

Signal acquisition module comprises sensor interface P1, operational amplifier U6A LM324, the 8th resistance R 8, the 9th resistance R 9, the 8th filter capacitor C12; 3 pins of sensor interface P1 meet VDD5-1; The 1 pin ground connection of sensor interface P1; One end of 2 pins of sensor interface P1, the 9th resistance R 9 links to each other with an end of the 8th resistance R 8; The end of the other end of the 8th resistance R 8, the 8th filter capacitor C12 links to each other with 3 pins of operational amplifier U6ALM324; The 9th resistance R 9 other ends link to each other with the other end of the 8th filter capacitor C12 and ground connection; 2 pins of operational amplifier U6ALM324 link to each other with 1 pin of operational amplifier U6ALM324 and link to each other with the P1_31 pin of processor LPC2368; The 4 pin power vd D5.0 of operational amplifier U6ALM324; The 11 pin ground connection of operational amplifier U6ALM324;