Summary: Feedback long time to the monitoring data of the atmospheric environment, is unfavorable to the question of guiding production, in order to simplify the course of data transmission, are based on the fictitious instrument developing platform LabVIEW 8 at the same time. O has carried on the design that the dust discharges the long-range monitoring system and studied. This system uses the data collecting card that NI Company produces, utilizes the data to gather to the assistant DAQ Assistant and drive the data collecting card, the ones that and adopted DataSocket communication to carry on the data are real-time and gathering long-rangely, has realized the long-range control to that the dust discharges. The experiment proves this system is stable and reliable.
Keyword: Fictitious instrument; LabVIEW; DataSocket technology; The dust is discharged; The computer controls long-rangely online
At present, the overall trend of worsening of China?s ecological environment has not been turned back at all yet, the environmental pollution state is serious day by day. The coal-smoke pollution represented by dust and SO2 is a general question of China?s air pollution. Among them, it is one of the main pollution that the chimney is discharged into the dust of the atmosphere, cause great danger to the mankind?s health. So, discharge the necessity monitored and already to the dust get the approval of the society day by day, the instrument about this kind of environmental monitoring is improving constantly too, but still exist for example the monitoring data feedback long time, unfavorable to guidance production; Dangerous as to some and environment abominable fit for the intersection of personnel and monitoring station of operation, going on, controlling live for a long time while being inconvenient; Question such as being too complicated of transmission course of the measurement. To the above-mentioned problem, utilize fictitious instrument technology and network communication, unless it use at LabVIEW, at 8 of LabVIEW. adopt by figure in O software platform last dust to last monitoring systems long-range the programming languages.
Long-range realization that controls of a fictitious instrument
LabVIEW is a kind of fictitious software developing instrument based on figure programming language, among them DataSocket is a kind of network transmission technology that NI Company offers, it is set up above the foundation of TCP/IP agreement, needn?t carry on complicated programming, TCP of ground floor, can only through the intersection of computer and to a plurality of terminal to travel the measurements of the scene meanwhile remote network. It has simplified the data transmission course between the application program and between the computers greatly. So use. It is quite convenient to user that DataSocket technology transmits the data. No matter by programming, or the method which the preceding board target chains, use DataSocket technology, the computer can transmit the data each other through Internet after LabVIEw procedure runs.
2 DataSocket technology discharges the application in controlling in the dust long-rangely
Have already developed out the appearance system of a set of laser granularity successfully in the laboratory. This system makes use of SSPA detector to survey the scattering optical signal after imitating the chimney of laser, gather and scatter the optical signal with the data collecting card M6220 that NI Company offers at the same time, then carry on data processing, in order to reflect the state of dust discharge of the chimney, the work is all in LabVIEW 8. Carry on on O software platform. Certainly, this simulation system should be installed in the chimney of the factory finally, in order to realize the function of controlling the dust and discharging, this involves the long-range question that controls too. Pass the contrast to several kinds of schemes, in view of strong function and easy to operate characteristic of DataSocket network transmission technology in LabVIEW, adopt this scheme to carry on the dust discharge state of the chimney real-timely and control online.
Use DataSocket to have two kinds of methods to transmit the data, one transmits the data among preceding board controlling part; Another kind transmits the data in the procedure. Have adopted these two kinds of methods to carry on the experiment in the laboratory separately.
The first kind chains the preceding board target with DataSocket. Must write and gather the procedure in carrying out the computer that gathers signal task at the scene with Lab-VIEW 8.0 at first, then can be realized and chained some essential arrangement to the attribute of target that plans to chain on the preceding board of this procedure, this arrangement includes chaining the way, chaining the type and chaining the settlement of the position. Fig. 1 is that the on-the-spot dust discharges the preceding board procedure that the data are gathered, preceding board this target include, sample passway, sample speed, adopt, count and signal reveal, start, stop button and store the button,etc.. Put these targets into the preceding board in gathering on-the-spot another computer next door, but no longer need to be wired among target here, only need and can be realized on the target?s attribute to gathering the controlling long-rangely of the procedure live corresponding arrangement. Fig. 2 is that users control the dust to discharge the preceding board procedure that a kind of data are gathered long-rangely. Long-range users can gather the course through a data which control the scene of control in the preceding board procedure illustrated in Fig. 2, gathering the change of way and data live at the same time will be feedbacked to the long-range user?s end. For example, discharging in the dust has a computer acquisition data live, so long-range users can control the procedure which gather the data to run through another computer, revise its sample passway and sample the number of times, and read its sample data. Can also transmit the result interface after carrying on data processing live to the long-range user?s end, or deal with the data in the long-range user?s end, and get the discharge state of the dust finally.
The second kind is to set up and chain with programming method. Can utilize DataSocket write and the intersection of DataSocket Read and function of function in the sub template write the procedure. Write the data on a computer that gathers scene with DataSocket write at first, this computer must open DataSocket Serve before operating the procedure, then write the procedure to transfer DataSocket Read function on another computer, position the computer address gathered live appointed from URL Read the data. While using this way to transmit the data, DataSocket Serve releases the newest data only to the data customer. When the computer that releases data runs faster than the computer which receive the data, some data have not been read and have been covered, will cause the data to lose then yet. In order to guarantee to transmit the accuracy of the data, should transmit the data with method of the data buffering area. Have adopted DataSocket Select URL function in DataSocket module in the course of writing this procedure, DataSocket Open function, DataSocket Read function and DataSocket Close function. 3 Fig., 4 Fig. write, gather data that get and adopt, buffer way, read the intersection of procedure and block diagram of field data live to DataSock-et. After procedure in the 4 Fig. run, can play communication frame, brief users on, choose a data source, and export URL that users chose, the chaining between computer and long-range computer so gathered live has been set up.
In addition, can release the procedure on Web too. Use Web server of LabVIEW, can release the preceding board picture of LabVIEW procedure in the network, in order to be for the long-range computer with usufruct to have a look around. After only needing to open and set up Web server in LabVIEW on the computer that releases procedure, no matter computer then on the network has installed LabVIEW, so long as input correct URL in Web browser according to the fixed form, can look over the preceding board of the procedure in the computer memory of Web server dynamically. Fig. 5 provides a computer on the network and utilizes Web browser to look over and monitor the webpage on preceding board of procedure when the dust is discharged live.
In practical application, can take the way in which the above-mentioned several kinds of methods combine together to set up dust to discharge the long-range monitoring system. The atmospheric environmental monitoring system imagined is mainly to surround department?s unit by on-the-spot monitoring station, data information center, government department, Guangzhou in environment protecting mode, join through Internet, can realize one and set up environmental information database, share the environmental monitoring data, exchange the network information platform of relevant information. Network block diagram as the information system of the atmospheric environment shown of Fig. 6.
3 concludes the speech
Greater meaning, 8 of Lab-VIEW what dust discharge controls long-range. DataSocket implementation method where technology offer the convenience to controlling long-rangely of O. Can be by controlling a plurality of environmental monitoring points long-rangely through the network, department in environment protecting mode, can get the feedback information of each monitoring point in real time, and can also carry on data interchange between each monitoring station, have raised the efficiency of environmental monitoring greatly. This set of dust discharged the long-range monitoring system to already finish the simulation experiment in the laboratory successfully, get the more accurate measurement, believe its application will play a positive role to environmental protection.
This entry was posted on Saturday, June 11th, 2011 at 8:17 pm and is filed under Uncategorized. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.
Source: http://roadms.org/the-dust-based-on-labview-discharges-the-long-range-monitoring-system-to-study/
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