King of Industry

After Zhao Guoyang spoke, Xu Linlin rubbed his hands and said timidly, Mr. Zhao, I'm sorry, I still have a question to ask.

Zhao Guoyang nodded, stretched out his hand, and made a please gesture.

Xu Linlin glanced at Ji Chongxuan, the teacher next to him, and continued: From your narration, we have basically understood the development of mine hoists at home and abroad, and also know the technology of the internationally advanced hoist electric control system. level……

My question is, how is the mine hoist, which represents advanced foreign technology, better than our domestic ones in terms of electronic control system?

The product that we 'SMS Company' is about to start developing, can it compete with these excellent products in the world and seize market share?

After Xu Linlin asked these two questions, Zhao Guoyang looked at him with admiration.

Indeed, although this young man with a somewhat thin body was unremarkable in appearance, the questions he asked were all very good.

It can be seen that his accumulation in basic electromechanical theory and practical application is still very deep.

Just as Zhao Guoyang secretly admired Xu Linlin, the technicians of SMS Company also began to pay attention to this humble young man.

During these two days of getting along, the technicians of SMS Company have already known the identities of Professor Ji and these students, and they also know that they will work with you on this mine hoist for a long time in the future R\u0026D and manufacturing of new products.

Under such a background, everyone certainly hoped that the abilities of these six students would be as strong as possible.

After all, no one would like to have some unusable or even slow-down teammates in their regiment.

After Xu Linlin asked this question, Zhao Guoyang pressed down on the outstretched hand and said: Student Xu Linlin, sit down, next, I will briefly answer this question for you...

After Xu Linlin sat down, Zhao Guoyang said slowly, Student Xu was right about one thing just now.

Because of the special requirements for safety, reliability and speed regulation performance of mine hoists, the technical level of the hoist's electrical control system, to a certain extent, represents the transmission control technology level of an enterprise or country.

Judging from the foreign mine hoists that are currently popular in the market, the application characteristics of their electronic control probably have the following aspects...

First of all, the first point is to improve the microcomputer control of the process.

Zhao Guoyang raised a finger and said: Foreign mine hoists, most of them have adopted microcomputer control in the process of hoisting.

The microcomputer has powerful functions, flexible use, fast computing speed, monitoring and display, and is also very easy to implement. Most importantly, it has a self-diagnosis function, which cannot be realized by using analog control!

The backwardness of this technology is also the most important reason why our domestic hoists are gradually declining.

After Zhao Guoyang's words were finished, Ji Chongxuan's expression became more serious.

Based on this old Ji's understanding of the level of domestic electronic control systems, he certainly knows that what Zhao Guoyang said is genuine dry goods.

The reason why the domestic mine hoist is sluggish in the market is that it gradually loses the market. One of the most important reasons is the backwardness in control.

Although several joint venture manufacturers of mine hoists in China have gradually adopted microcomputer control technology, their technologies are all imported from abroad, and the cost is quite high.

In order to really come up with products that can compete with European and American powers, in terms of microcomputer control, it really needs to greatly strengthen its own soft and hard power.

On this issue, Ji Chongxuan completely agreed with Zhao Guoyang's opinion.

Just when Ji Chongxuan was secretly feeling emotional, Zhao Guoyang continued to tell everyone the next one.

The second application feature of foreign hoists in terms of electronic control is the accurate control of the hoisting stroke.

Looking around, Zhao Guoyang said word by word: Maybe everyone here knows that the control of the hoist is essentially a position control.

The purpose is to ensure that the lifting container stops accurately at the predetermined location. That is to say, the control of the hoist requires very high accuracy.

When Zhao Guoyang said this, Kong Dezhong subconsciously interjected: Mr. Zhao, what is the accuracy of this? Is there any one within a certain range?

Zhao Guoyang gave a hmm and explained: Our domestic mine hoist has no strict requirements on the accuracy of travel control. However, in foreign countries, some well-known brands have requirements in this respect within ±2cm. of……

Ah, ±2cm? This... this is too exaggerated!

After Zhao Guoyang said this, before Kong Dezhong could speak, Liu Yan, the big-breasted girl over there, had already screamed.

Indeed, after working hard these days and dismantling the purchased mine hoist, they already have a relatively comprehensive understanding of some of its basic parameters.

As far as the purchased medium-sized mine hoist is concerned, its travel in the up and down direction is about 150 meters.

And if it is replaced by a large and super large mine hoist, this number will be magnified several times.

In other words, the error in stroke control of well-known foreign brands of mine hoists is less than one ten-thousandth.

This number is really astonishing.

Hearing Liu Yan's exclamation, Zhao Guoyang turned his eyes around her, and slowly explained: Although this number is amazing, it actually exists.

Because of the use of microcomputer control, these first-class foreign products can be processed in a centralized manner by collecting various sensor signals, such as rotation angle pulse changes, wire rope slippage, shaft, drum and wire rope wear and other signals.

In this way, the exact position of the container can be calculated in a very short period of time, and it can be controlled and protected. As for the general process control and stroke control, it can also be monitored by a microcomputer and completed by a separate lower computer...

Zhao Guoyang's narration made the meeting room suddenly silent.

Everyone is immersed in the amazing and emotional microcomputer technology of foreign mine hoists.

After everyone had digested his narration for a while, Zhao Guoyang went on to talk: As for the third application feature, it is the monitoring of the mine hoist during the hoisting process.

As we all know, the monitoring of the hoisting process is as important as the safety loop in the control of modern hoists.

In this regard, the first-class foreign products usually use a microcomputer to complete a series of parameter controls during the upgrading process.

Zhao Guoyang opened his fingers and explained in detail: For example, the monitoring of various working parameters during the lifting process; the monitoring of the operating status of each major equipment; the monitoring of the signals of each sensor, etc.

With this series of all-round monitoring, in many cases, various failures have been dealt with before they occur, which can effectively prevent accidents from happening.

In addition, microcomputer technology can also store, save or print out various monitored parameters, and even be connected to the upper computer network, and merged with the entire large mine monitoring system, which is also very common.

By the time Zhao Guoyang mentioned it, Ji Chongxuan had fully recognized this young man's technical strength in mine hoists.

There is no doubt that this young man's understanding of the mine hoist product is by no means copied mechanically from books and magazines, but has really been studied in depth.

Because even a professional such as Ji Chongxuan is not completely clear about the electronic control technology of these mine hoists that he just mentioned.

After a moment of silence in the meeting room, Zhao Guoyang finally said: As for the last application feature, it is the safety circuit.

On the mine hoist, the safety circuit refers to the link that controls the hoist to enter the safety protection state when a mechanical or electrical failure occurs.

From the literal meaning, it is not difficult for everyone to see the importance of the safety circuit. It is the last link in the protection of equipment and operators, and its importance is incomparable...

Currently, several mine hoists representing the international advanced level have used PC microcomputer technology in the safety circuit, so that the safety circuit has a complete fault monitoring function.

After using this latest technology, whether it is the hoist or the safety circuit itself, when there is a failure, it can accurately implement safety braking, thereby avoiding serious consequences.

After a slight pause, Zhao Guoyang smiled slightly, and finally concluded: Basically, that's all I want to say about the application characteristics of the internationally advanced mine hoist in terms of electronic control.

Everyone still doesn't understand, you can speak freely, let's discuss and research together!

Seeing Zhao Guoyang's calm appearance with his hands spread out, everyone in the conference room was filled with admiration from the bottom of their hearts.

Even Liu Yan, the big-breasted girl who had a little disdain for Zhao Guoyang before, had to admit the hard power of the other party in this regard.

Zhao Siyan, who was sitting next to Zhao Guoyang, was the one who touched him the most.

In fact, when Zhao Siyan was in school, she also participated in the design and improvement of some large-scale construction machinery.

Although she appeared as an assistant most of the time, her understanding of this kind of heavy industrial machinery was far better than that of ordinary undergraduate graduates.

As for Zhao Guoyang, it is clear that after graduation, he has never participated in the research and design of heavy machinery, and may not even have contact with heavy machinery products.

Because of this, his narration is even more amazing and convincing.

While everyone was silently reviewing Zhao Guoyang's series of narrations just now, Ji Chongxuan, who had been silent all this time, suddenly spoke out.

He glanced at Zhao Guoyang, and then slowly said to his students: Did everyone hear what Mr. Zhao said just now?

Dezhong, Chen Li, you two have been studying with me for almost four years. How far do you think you are from Mr. Zhao in terms of understanding of hoist electrical drive systems?