Six people on stage description 1 part, right? Hehe, writing a complete article for you is too much work. Say it briefly. Each of you has your own role.
Grasp the main equipment inside, study hard, find out under 1, and then beautify and improve your speech. Ask me if you don't understand.
Such as a temperature control system.
Zhao Da: Hello, leaders and colleagues. Our group has completed XXX automatic temperature control system. Overall, this system is on today's Control Science Day.
The new moon is rare under the rapid development of the tide, but it is also sprinkling water ~ ~ (drinking water ~) for us talents
My name is Zhao Da, and I am the chief designer and commander of this system. I mainly design the structure of the system under the macro assignment of 1
Zhang San: I am mainly responsible for the software part of this system. I am familiar with VB VC++. The software of this system is mainly difficult to communicate and display. I'm not good at RS232 communication, but I finally got through. Later, the interface was troublesome and the workload was heavy. My friend told me that configuration software can be used in industry now, and I learned 1 temporarily! Good (hair: Yin Hao) use, all equipment has a ready-made picture library, as long as the logical relationship is clearly defined, a good wife can use it. I chose 1 the imported eagle of MCGS Kingview made in China, and finally I used the domestic eagle, which is not limited to the version.
My task is to collect and control units.
There are 1658 points in this system, including 628 current signals, 432 voltage signals, 1 120 switching signals and speed pulse signals. It took me 72 acquisition boards and 10 PLC to complete it. This system is the most important one here. I'm sorry I fainted. . . .
Wang Ermazi: I'm from Shandong and I'm in charge of the communication part of this system. The communication of this system mainly includes two types, one is the communication between field components and acquisition.
Set the communication of the control system, and other 1 systems provide remote communication for the controller or management bank.
After the on-site sensor signal comes out, although the standard current signal of 4-20mA used by Laowu can be transmitted far away, 4, our school is too far away (Liao) ~ too big.
And I want to show it, so it's arranged like this: there are two kinds of signal transmission from the sensor to the control center:
1, the unified signal near the main control room directly enters the acquisition unit, while in the distance, I use a new wireless digital radio station ~ WC250, which
Radio stations are very convenient. It has the function of analog acquisition and then wireless transmission of signals to base stations within 3 kilometers, and its acquisition terminal is ok.
16 adds a radix. After receiving the signal, the base station can communicate directly with the computer through RS232. Okay, what? Mong Kok
Why don't you use GPRS? Your grandmother is a hero, GPRS charges, and you are the black sheep. . . ! I * @ #&! I'll use it as long as you pay. . .
2. The biggest highlight of this system is the addition of a fun function: when the principal or other managers are not in school, they can see the system at any time.
Professor Wang said that you paid the GPRS fee, so I used it. The main system will provide the collected data and the control status of the system remotely through the communication machine-GPRS communication unit.
Management login interface, managers can see and even operate the system at any time through mobile phones.
Pi Huang: My task is to ensure the power supply of the system; This kind of wood is very complicated. The 24V power of Lao Liu's two-wire system is low, but Li's power is low, but I have also done a lot of work, mainly 1, selected power supply modules with corresponding power, calculated and distributed 1 in a unified way, and made some power cabinets. In order to prevent the system from working normally in case of power failure, I got a UPS, which was made by hand. The battery adopts XX brand UPS.
Laowu Liu: I am responsible for the selection, installation and maintenance of on-site measuring components. This system is also inseparable from the common path, which is basically the measurement of temperature, pressure and flow.
As well as signals reflecting the status of some devices, I will introduce their choices under 1 respectively:
1, the temperature mainly has several ranges: one is the normal temperature environment such as classrooms and dormitories, which is basically in the range of-10 to 40 degrees Celsius, and generally adopts PT 100 thermal resistance.
However, the other is a high temperature environment, such as the main heating pipeline and the outlet of boiler flue. We use thermocouples and connect them with modules with transmission function.
Measure the 4-20mA standard current signal output from the other side of the primary element.
2. We choose the corresponding pressure transmitter, which is nothing more than the range selection of each measuring point, and the environment of our school does not need explosion protection and prevention.
Rotten, they are all general models, except that the boiler heating system adopts high temperature, and other pressures such as water supply system are very common! According to Li Si's request
I also gave him a standard current signal of 4-20mA. Of course, I also have a general bus that meanders without taking a bath, saying that PA is afraid of your misunderstanding. By the way, I said in the northeast.
You don't mind.
3. Flow is used to measure steam flow. I used an electromagnetic flowmeter, and Lao Zhao asked me to use vortex street. He was wrong. The pipes we built were laid irregularly.
The fan is too big to use vortex street now, the orifice plate is too advanced, and the differential pressure transmitter is not cheap.
That's basically it. The principle of choice is to seek the most expensive but not the best ~ wrong, wrong, you are stuck in this guru ~, which means cost first and high reliability! decrease
No ~.