Application of the hottest microcomputer detection

  • Detail

The application of Microcomputer Detection in heat

first, the composition of the system

the thermal monitoring system of our company is a set of system that has been gradually improved in more than five years under the condition that the company is short of funds to provide manufacturing possibility for configuring higher capacity battery packs

the system platform is NT4.0, and the software is designed and developed in vc++6.0 language environment. The functions of communication interface, data processing and chart drawing are quite perfect. After two years of non-stop operation, the software system has never crashed and other failures. In addition, the software is also divided into client and server. The server software is installed on the industrial computer, which is responsible for data acquisition and processing. The client software is installed on the workstation in the network, which can communicate with the server software in real time, and can also see the real-time data on the industrial computer, so that managers and other department personnel can monitor the hot operation on their own computers

the hardware of the system consists of five parts: upper computer (i.e. industrial control computer), radio, controller, lower computer (i.e. intelligent instrument) and local area

1. considering the 24-hour non-stop operation, the upper computer adopts the rack-360 industrial control machine of Advantech company. The machine is configured with PIII 500MHz CPU, 64MB memory and 20GB hard disk, which can meet the operation of the thermal monitoring system software. After two years of non-stop operation, the machine has never failed, and the quality is still very good

2. the radio adopts nt-228 radio of neotronic company, which is a data transmission radio with a maximum power of 25 watts. It has a 25 pin RS-232 interface that can be directly connected to the computer. The working frequency range is 220 ~ 235mhz. We use 229.775mhz. This frequency band belongs to medium wave and has a strong ability to cross obstacles. Under the condition of using directional antenna, the general floor cannot withstand this signal, This is very beneficial for a large number of watch rooms that are not adjacent to high-rise buildings, which facilitates the erection and installation of antennas

3. the controller adopts the signal conversion equipment designed by Jinzhou instrument factory with 7512b chip as the core. It is mainly responsible for the signal conversion between the lower computer and the radio station. Its interface with the radio station is RS-232, and its interface with the lower computer is RS-485. The communication of RS-485 can be realized only by German enterprises in the world, and the distance can reach 2 ~ 3 kilometers. In this way, the instruments in a small range can be interconnected and communicated with a radio station, This can save equipment investment

4. The lower computer adopts the zlj-iii multi-function intelligent flowmeter of Jinzhou instrument factory. This instrument is not only stable and reliable in steam measurement, but also excellent in communication design. In addition to the CPU chip used for measurement and calculation, there is also a special CPU chip 89c55 for communication control, which reduces the interference of communication to measurement and makes the operation of the whole instrument quite stable

5. The local area adopts NT, the network wiring structure is star structure, and the amp super class 5 twisted pair is used. The and wiring mode is adopted. The hub uses TP-LINK tl-hp16fe hub, the server is ibm-315 server, and the workstation is several Lenovo computers. Such a network system can meet the operation of the thermal monitoring system software

the hardware structure diagram of the system is as follows:

the center of the monitoring system is the industrial computer part, which is placed in the company's dispatching room, connected with the company's local area, and connected with the radio station with the connection line from RS-232 9-pin interface to 25 pin interface, directly controlling the transceiver of the radio station. This radio station uses an omni-directional antenna as the main station, which is convenient for communication with other radio stations. Other radio stations use directional antennas for sub stations, and feeders use -7 multi-core coaxial cables, which are softer than single core cables and easier to route. The controller is specially equipped with a 25 pin interface cable to connect with the substation radio. The connection between the lower computer and the instrument uses a three core shielded communication line. The radio also needs a special DC power supply for the radio. The voltage of 13 steel can not effectively reduce the weight of the vehicle 8V, the maximum current is not less than 7a

II. The main functional features of the system

1. Real time patrol measurement of each heat consumption unit data

measure and record the full operation parameters, including temperature, pressure, instantaneous flow, cumulative volume and power failure display, keep 8 of them pure electric vehicles synchronized with the field secondary instrument data, and timely display the load changes of each heat consumption unit, It enables the management and dispatching personnel to see the current and previous operating parameters of the site at any time in the dispatching room and their own offices, and timely discover the problems of the metering instruments, so as to directly carry out unified dispatching and management of the whole system, ensuring the reliable operation of the instruments, the stability of heating parameters and the economic and safe operation of the whole heat

2. Historical data and curve storage

can store a large number of supply and consumption heat data, and draw temperature, pressure, instantaneous flow curves, which is convenient for analyzing the change and query of supply and consumption heat load. According to these data, analyze the operating conditions, count various relevant parameters, and timely discover various abnormal phenomena in the system, so as to analyze the possible faults of the system, and take preventive and solving measures in advance. These data can also be used as the basis for solving the measurement disputes between the heat supply and consumption parties, which is convenient for consulting when there is a dispute in the settlement, and these data, charts and curves can be printed out

3. relevant report statistics and curve comparison function

data statistics can be carried out and tables, monthly reports and annual reports can be generated. According to the supply and consumption, the supply and consumption curve in the same time period can be compared on the same screen, so as to understand the supply and consumption of heat in each time period and provide scientific and real data for the analysis of pipe section loss. The heat in our city is divided into three regions, and the total flow of the region is measured and displayed by the three regional general meters respectively. In this way, the monitoring system can directly compare the general meters of each region with the sum of the heat unit meters in the region, and visually reflect the loss of each region. According to the loss of each area, find out the reasons for the high loss of the pipe section and take corresponding measures to solve it, which can achieve twice the result with half the effort and have a targeted effect

4. Real time data transmission and data sharing in the local area

each workstation in the local area installs the client software of the monitoring system according to the needs, which can realize the functions of real-time data monitoring, historical data and curve query, so that the system can be applied in a wider range and greatly facilitate the production and operation work

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