CN201698574U

CN201698574U - Data transmission device of comprehensive online monitoring system for atmospheric environment

Info

Publication number: CN201698574U
Application number: CN2010202194831U
Authority: CN
Inventors: 张伟; 沈琼霞; 张瑞; 罗进
Original assignee: WUHAN BOLANGHENGYE ELECTRIC CO Ltd
Current assignee: WUHAN BOLANGHENGYE ELECTRIC CO Ltd
Priority date: 2010-06-09
Filing date: 2010-06-09
Publication date: 2011-01-05
Anticipated expiration: 2020-06-09

Abstract

The utility model relates to a transmission device which is connected with a data source through wired networks such as RS232, CAN and RJ45 and forms a wireless sensor network in the ZigBee mode to realize data exchange between a monitoring point and a monitoring substation, in particular to a data transmission device of a comprehensive online monitoring system for the atmospheric environment, which comprises a data controller, a wire transmission module, a wireless transmission module and a power management unit, wherein the data controller consists of an embedded microprocessor; the wire transmission module comprises wired interfaces such as an RS232 serial port, a CAN bus interface, an RJ45 network port and the like; the wireless transmission module mainly comprises a ZigBee interface; and the power management unit comprises a linear lithium battery charging management chip and a DC-DC transformer module. In the utility model, a heterogeneous network is formed between the monitoring point and the monitoring substation through the data transmission device, and the monitoring point can form the transmission network quickly and conveniently at low cost under different environmental conditions so as to realize the data interaction with the monitoring substation.

Description

Atmospheric environment comprehensive on-line monitoring system data link

Technical field

The utility model relates to a kind of atmospheric environment comprehensive on-line monitoring system data link based on heterogeneous network, specifically is to be connected with data source, to form the transmitter that wireless sensor network is realized exchanges data between monitoring point and the monitoring substation in the ZigBee mode by cable networks such as RS232, CAN, RJ45.

Background technology

The networking, the intellectuality that realize household electrical appliance are people's dreams for many years.Because after the notion of networking, intelligent innovation joins in the household electrical appliances, can form new focus, produces new demand and also be numerous household electrical appliance production firm and make great efforts one of direction of researching and developing.Along with the development of modern science and technology, household electrical appliances miscellaneous have spread in the middle of each family, yet using and moving of these household electrical appliances all is separately independently, and the work halted state of various household electrical appliances must be by manual control.Because each power supply and various household electrical appliances in the family are not with communication interface, can not insert in the Smart Home Control Network, can not satisfy the user anywhere, random time is to the robotization control of the control of household electrical source and household electrical appliances and Smart Home central controller.Therefore the development and design user anywhere, can to control in the family controller of power supply and electrical work state under the random time, free position necessary.

Along with urbanization and industrialized accelerated development, the pollutant that influences atmospheric environment increases rapidly." modification Air Pollution Prevention Law " was included into Standing Committee of the National People's Congress's legislation programming first in 2009, new real-time monitoring, on-line analysis demand makes the monitoring method of traditional off-line type and abatement tools more and more awkward, the research and development of atmospheric environment automatic monitoring system and use extremely urgent.Wherein, each monitoring point environmental baseline complexity of living in, have in addition be in the rugged surroundings and work, the present position disperses, and makes it and the data transmission monitored between the substation becomes one of outstanding problem of atmosphere on-line monitoring system.At present, both at home and abroad the monitoring point instrument of producing generally all has the wire transmission interface, as RS232, RJ45 etc., yet in many circumstance complications area and be not suitable for organizing cable network, arranges that the cost of wire message way is also very high.Therefore, design a kind of data link, realize networking mode wired, wireless compatibility, be very important for realizing effectively connecting between monitoring point and the control sub-station based on heterogeneous network.

Summary of the invention

The purpose of this utility model is at above-mentioned present situation, aim to provide a kind of data link that can be applicable to the atmospheric environment comprehensive on-line monitoring system, satisfy the monitoring point quick under the varying environment condition, convenient, form the demand of transmission network at low cost, to realize and the data interaction of monitoring substation.

The utility model discloses a kind of data link of atmospheric environment comprehensive on-line monitoring system, its implementation is recording controller, wire transmission module, wireless transport module and Power Management Unit.Described recording controller is the core of this system, is made of an embedded microprocessor; Described wire transmission module comprises wireline interfaces such as RS232 serial ports, CAN bus interface, RJ45 network interface, the main networking that links to each other with the data acquisition instrument of each monitoring point or carry out wired mode in the environment of condition permission; Described wireless transport module mainly is the ZigBee interface, forms wireless sensor network and carry out data transmission between each monitoring point and monitoring substation; Described Power Management Unit is made up of linear lithium cell charging managing chip and DC-DC transformation module, because monitoring point and transmitter have portability, must adopt powered battery, need carry out battery management.

Description of drawings

Fig. 1 is the utility model structural representation,

Fig. 2 is RS232 serial port circuit figure,

Fig. 3 is a CAN interface circuit synoptic diagram,

Fig. 4 is a RJ45 interface circuit synoptic diagram,

Fig. 5 is a ZigBee interface circuit synoptic diagram,

Fig. 6 is the electric power management circuit synoptic diagram,

Fig. 7 is the utility model fundamental diagram

Embodiment

Describe the utility model with reference to the accompanying drawings in detail.

The structure of atmospheric environment comprehensive on-line monitoring system data link is with reference to shown in Figure 1, and this transmitter comprises four parts, i.e. recording controller, wire transmission module 1, wireless transport module 2 and Power Management Unit 3.

Recording controller is a data processing unit that is made of embedded microprocessor system, is used to control each interface and receives the transmission data and carry out corresponding data protocol conversion.Various single-chip microcomputers, arm processor or DSP that MCU generally can adopt in the market to be provided are as C8051F120 (integrated CAN interface), S3C2410 (ARM9), TMS320VC33 (DSP) etc.

The wire transmission module has comprised three class transmission interfaces: RS232 serial ports, CAN and RJ45 network interface.Can also expand other wireline interfaces according to concrete needs.Because present atmospheric parameter testing tool generally has above cable data interface,, obtain Data Source so transmitter can directly link to each other with the testing tool of monitoring point by these wireline interfaces.In addition, when environmental baseline allowed, these wireline interfaces can directly be formed data transmission network and monitoring substation Data transmission.

The RS232 serial ports can be realized by serial port drive chip and MCU cascade.With MCU and RS232 interface chip for driving MAX232 is example, and Fig. 2 has provided main circuit and connected.Wherein ROUT and TIN are the Transistor-Transistor Logic level Serial Port Line of MAX232, link to each other with the TXD pin with the RXD of MCU; RIN and TOUT are the serial ports level pin of MAX232, link to each other with 2,3 pins of DB9 serial port socket, and the serial ports socket directly is connected into the RS232 network.

The CAN interface mainly can be in two ways reality, the one, the MCU of direct select tape CAN interface is as C8051F120 etc.; The 2nd, realize with MCU+CAN controller+CAN chip for driving.Interface with MCU and CAN controller SJA1000, chip for driving 82c250 is an example, and Fig. 3 has provided main circuit and connected.Wherein, AD0～AD7 is 8 bit data bus of SJA1000, links to each other with the data port P0 mouth of MCU.VDD is+the 5V direct supply, VSS is a ground signalling, RST is the chip Restart Signal, INT is a look-at-me, RD and WR are respectively read-write control signal, and CS is a chip selection signal, and ALE is a mode select signal, RX0 and TX0 are the CAN bus-out signal, and these two signals become CANH after driving through 82c250, the CANL signal inserts CAN bus physical network.

The RJ45 network interface can be realized by network port driving chip and MCU cascade.With MCU and chip for driving RTL8019 is example, and Fig. 4 has provided main circuit and connected.Wherein D0～D15 is 16 position datawires, and A0～A15 is 16 bit address lines, but only selects register address and the storage address of RTL8019 by 4 address wire A0-A3, and control also realizes reading of data.IORB and IOWB are the read-write of RTL8019, link to each other with RD, the WR of MCU respectively.RSTDRV and AEN are the chip enable signal of RTL8019, and the A13-A15 of MCU and IS signal are controlled the chip selection signal of RTL8019 by GAL22V10 type programming in logic device.TPIN+, TPIN-, TPOUT+, TPOUT-are the RTL8019 output signal, directly link to each other with the RJ45 interface, are connected into Ethernet.

Wireless transport module mainly comprises the ZigBee interface.The ZigBee interface can make each monitoring point and monitoring substation form data transmission network very easily, has very strong adaptability for various monitoring of environmental.With the restriction that the wireless mode networking is not only connected up, the monitoring point move or to add new monitoring point all very convenient.

The ZigBee interface also can realize by dual mode, the one, select the ZigBee SOC (system on a chip) of integrated processor, as cc2530 etc.; The 2nd, realize with ZigBee rf chip and MCU cascade.With MCU and ZigBee rf chip cc2520 is example, and Fig. 5 has provided main circuit and connected.Cc2520 carries out interface with MCU by 4 line spi bus (SI, SO, SCLK, CSn) and is connected, and the mode of operation of chip is set and realizes operations such as read/write is data cached, read/write status register.

Because the working environment restriction, atmospheric environment comprehensive on-line monitoring system data link need adopt powered battery.Power Management Unit is mainly finished two functions: the voltage transformation of battery charge and DC-DC provides the DC voltage of 5v, 3.3v, 1.8v for MCU, interface chip etc.Can adopt special charging chips such as MCP73828, CN3052 as battery charge, the DC-DC module can be selected PT1301 etc. for use.

With reference to Fig. 7, atmospheric environment comprehensive on-line monitoring system data link is mainly used in forms wireless sensor network transmission data between monitoring point and monitoring substation.Its course of work mainly contains following two kinds:

1, the data transmission between monitoring point and the transmitter.Each monitoring point all links to each other by wired mode with a transmitter, and the distance of monitoring point and respective transmissions device is approaching.The surveying instrument of monitoring point passes to transmitter with the data that measure by cable network, and transmitter is also passed to the monitoring point to the instruction of monitoring substation.

2, the data transmission between monitoring substation and the transmitter.The monitoring substation is connected by wireless sensor network with transmitter, and the transmitter access of radio network of oneself is also passed through in the monitoring substation.When monitoring substation and monitoring point relatively near the time, their transmitter separately can directly transmit data; When distance surpass wireless connections effectively apart from the time, need by other transmitter to realize connecting through multi-hop as relaying.

Claims

1. the data link of atmospheric environment comprehensive on-line monitoring system is characterized in that recording controller, wire transmission module, wireless transport module and Power Management Unit; Described recording controller is an embedded microprocessor; Described wire transmission module comprises wireline interfaces such as RS232 serial ports, CAN bus interface, RJ45 network interface, and described wireless transport module mainly is the ZigBee interface, and described Power Management Unit is made up of linear lithium cell charging managing chip and DC-DC transformation module.