Meter data acquisition management system design and implementation of wireless transmission

Abstract: the water meter data collection and wireless transmission management system design and implementation of information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Abstract: due to the production enterprise to factory within the scope of the meter reading data cable network cabling work has certain difficulty, designed for distribution in a certain factory of data collection of 50 pieces in all parts of the water meter wireless network mode, and is controlled by the workstation to the scene. More flow meter manufacturers choose model price quote you are welcome to inquire, here is water meter data collection and wireless transmission article details the design and implementation of management system. Due to the production enterprise to factory within the scope of the meter reading data cable network cabling work has certain difficulty, designed for distribution in a certain factory of data collection of 50 pieces in all parts of the water meter wireless network mode, and is controlled by the workstation was carried out on the field data display, processing, and save the calculation. To realize the stable operation of system, completed in the manufacturing of production water flow statistics and analysis, real-time meter reading, improve the production efficiency, reduce production costs. Key words: wireless data transmission database, server 1 introduction production-oriented enterprises mainly produce water refers to water directly used in industrial production. On the water treatment system using real-time monitoring system, able to timely and detailed understanding of the change of water consumption, easy to take corresponding measures, the user is limited by geographical environment and working content, with the cable, cable transmission network wiring project has a great inconvenience. Then, using the wireless monitoring can get rid of the shackles of cable, with short installation period, easy maintenance, expansion ability, quick cost advantages. Meter data acquisition transmission management system is introduced in this paper according to the distance a production enterprise of outdoor and production, has a perfect office environment designed to realize the data real-time wireless transmission, central control room and in the data storage, analysis and management. This system consists of electromagnetic flowmeter acquisition field water flow, where a total of 50, the factory district 2 km, 1 km wide, patch distribution of water in the factory. Require all electromagnetic flowmeter signal collected in the form of wireless transmission, central control room of the central control room in the upper machine to realize real-time monitoring data of the electromagnetic flowmeter to the corresponding data statistics, report analysis, history curve. Field data acquisition of electromagnetic flowmeter with TOSHIBATIG series, the LF402 converter model, can be an external GPRS communication module and wireless data transmission radio station. Considering the status quo of the production enterprises, the NH719 - 1 digital radio, upper data acquisition processing software using VB6. 0, use SQLserver2000 database to complete the regular meter reading function. Record the flow of each patch instantaneous value and the total flow ( So far the cumulants) 。 2 2 wireless transmission system. 1 network mode system adopts + from the stand of the main network mode, the main central control room located in, from the scene of the station distributed in each meter. System network mode is shown in figure 1. Figure 1 this project adopts the NH719 - system networking way 1 digital radio, adopts advanced frequency synthesis technology, CPU phase-locked loop control, with a modem, can provide the transparent transmission of voice or data signal, to adapt to all kinds of point to point, point to multi-point wireless data communication, a transceiver integrated, easy installation, simple to use, cost-effective and stable and reliable, widely used in all kinds of remote data acquisition control system. The state administration of radio, the ministry of information industry for SCADA system cleared the 223 ~ 235 MHZ wireless data communication special frequency band. On the basis of NH719 - Digital radio frequency 230 MHZ (1 Adjustable from 220 to 240 MHZ) , zui emission power of 25 w, can support RS232 and RS485 communication interface, transfer rate is adjustable, 1200/2400/4800/9600b /秒) 。 The system is located in the main is controlled. Master station system of wireless digital radio is responsible for receiving various RACES from the field data. Through the workstation, RS232 serial interface to transmit data to the upper system by the host system to store data analysis. System with a total of 50 stations, water distribution in each place. Substation wireless digital radio is responsible for the reception of the electromagnetic flowmeter to collect real-time data, then sends the data to master station of the wireless digital radio. 2. 2 master station and communication protocol system from the stand of communication using the master-slave communication protocol, scanning each communication process is initiated by the host, and then from the machine to respond, back information, complete a communication process. Sent to the host information from machine is composed of 4 bytes, 1 byte is starting code ( 0 x2a) , 2 bytes from the machine address, its coding: 0 ~ 127 ( Zui binary otherwise defined) Command, 3 bytes of data classification, is the end of the code (4 bytes )表示就是0 x2e 。 From the machine after accepting to host command information, according to the requirements of the command echo measurement data. From the host machine response command, send back to 10 bytes of data, divided into command section, data section, calibration and terminated, 4 parts. 2. 3 communication communication testing steps. 1) Parameter setting from the station. For each from the stand of electromagnetic flowmeter set from number and rate of unified communications. 2) The selected communication frequency band. Each of the wireless data transmission radio has eight dial the code switch, by adjusting the dial the code switch can be selected different radio frequencies.

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