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

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

Xu Linlin glanced at the teacher Ji Chongxuan beside him, and then said: "Just from your description, we also basically understand the development status of mine hoists at home and abroad, and also know the technical level of the international advanced hoist electrical control system......

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

"Can we, the SMS company, start developing this product and seize market share?"

After Xu Linlin's two questions were raised, Zhao Guoyang was also a little impressed by him.

Indeed, this young man with a somewhat thin figure, although his appearance is inconspicuous, the questions he asked are all very level.

It can be seen that his accumulation of basic theories and practical applications of mechanical and electrical machinery is still very deep.

Just when Zhao Guoyang secretly praised this Xu Linlin, the technicians of the "SMS company" also began to pay attention to this inconspicuous young man.

In the past two days, the technicians of the "SMS company" have been clear about the identity of Professor Ji and these students, and they also know that they will work with you to develop and manufacture this new product of "mine hoist" for a long time in the future.

In this context, of course, everyone hopes that the abilities of these six students will be as strong as possible.

After all, no one wants some "unusable" or even delayed teammates in their group.

After Xu Linlin raised this question, Zhao Guoyang stretched out his hand and pressed down: "Xu Linlin, sit down, next, I will briefly answer this question for you......"

After Xu Linlin sat down, Zhao Guoyang slowly opened his voice and said, "Classmate Xu is right about one thing just now. ”

"Because of the special requirements of mine hoist for safety, reliability and speed regulation performance, the technical level of the electric control system is improved, to a certain extent, it represents the technical level of transmission control of an enterprise or country. ”

"Judging from the foreign mine hoists that are currently popular on the market, the application characteristics of its electronic control are probably as follows......

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

Zhao Guoyang raised a finger and said: "Most of the foreign mine hoists have been controlled by microcomputers in the process of lifting technology. ”

"The microcomputer is powerful, flexible, fast, easy to monitor, and most importantly, it has a self-diagnostic function, which cannot be achieved with analog control!"

"The backwardness of this technology is also the most important reason for the gradual decline of our domestic hoist. ”

After Zhao Guoyang's words were finished, Ji Chongxuan's face became more and more solemn.

With this old Ji's understanding of the level of the domestic electronic control system, of course he 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 has gradually lost the market. One of the most important reasons is the lag in control.

Although several domestic joint venture manufacturers of mine hoists have gradually used microcomputer control technology, their technologies are imported from abroad in a full set, and the cost is quite high.

If you want to really come up with products that can compete with the European and American powers, you really need to greatly strengthen your soft and hard power in terms of microcomputer control.

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

Just when Ji Chongxuan secretly sighed in his heart, Zhao Guoyang had already continued to tell everyone about the next article.

"The second application feature of foreign hoists in electronic control is the accurate control of the lifting stroke. ”

Glancing around, Zhao Guoyang said word by word: "Everyone here may know that the control of the hoist, in essence, is a position control. ”

"The purpose is to ensure that the lifting container stops accurately at the predetermined location, that is, the control of the hoist requires a very high degree of accuracy. ”

When Zhao Guoyang said this, Kong Dezhong below subconsciously interjected: "That Mr. Zhao, what is the approximate accuracy, is there any one within what range?"

Zhao Guoyang said "um" and explained: "Our domestic mine hoist, there are no strict regulations on the accuracy of stroke control for the time being. However, in foreign countries, some well-known brands have requirements in this regard, all within ±2cm......"

"Ah, ± 2cm......? That's an exaggeration, isn't it?"

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

Indeed, these days, after working hard and dismantling the purchased mine hoist, we have a more 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 for large, super-large mine hoists, this number will be magnified several times.

In other words, the error of the mine hoist of a well-known foreign brand in terms of stroke control is less than 1/10,000.

That's a staggering number.

Hearing Liu Yan's exclamation, Zhao Guoyang turned his gaze on her, and slowly explained: "Although this number is amazing, it is real. ”

"Due to the use of microcomputer control, these first-class foreign products can be centrally processed by collecting various sensing signals, such as corner pulse changes, wire rope slippage, wellbore, drum and wire rope wear. ”

"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 the microcomputer, and the ...... can be completed by a separate lower computer."

Zhao Guoyang's remarks made the conference room suddenly silent.

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

After everyone digested their own content a little, Zhao Guoyang continued: "As for the third application feature, it is the mine hoist, which is monitored in the lifting process. ”

"As we all know, lifting process monitoring is as important an important part of modern hoist control as the safety circuit. ”

"In this regard, foreign first-class products, in the process of upgrading, usually use microcomputers to complete a series of parameter control. ”

Zhao Guoyang snapped his fingers and explained 1510: "For example, the monitoring of various working condition parameters in the lifting process, the monitoring of the operation status of each major equipment, the monitoring of the signal of each sensor, and so on. ”

"With this series of all-round monitoring, many times, various faults have been dealt with before they occur, which can effectively prevent accidents. ”

In addition, it is also very common for microcomputer technology to store, retain or print out various monitored parameters, and even network with the host computer and merge with the entire large mine monitoring system. ”

Zhao Guoyang said that by this time, Ji Chongxuan had fully recognized the 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 a rigid copy from books and magazines, but has really studied it in depth.

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

After a period of silence in the conference room, Zhao Guoyang finally spoke: "As for this last application feature, it is the safety loop. ”

"On the mine hoist, the safety loop refers to the link that controls the hoist to enter the safety protection state when there is a mechanical and electrical failure. ”

"It is not difficult to see the importance of the safety loop, which is the last link in the protection of equipment and operators, and its importance is incomparable......

"At present, on behalf of the international advanced level, several mine hoists have used PC microcomputer technology in terms of safety circuits, so that the safety circuits have perfect fault monitoring functions. ”

"With this state-of-the-art technology, both the hoist and the safety circuit itself can be safely braked precisely in the event of a malfunction, thus avoiding serious consequences. ”

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

"If you still don't understand anything, you can speak freely, let's discuss and study together!"

Looking at Zhao Guoyang's calm appearance with his hands outstretched, everyone in the conference room was full of admiration from the bottom of their hearts.

Even Liu Yan, a big-breasted woman who was a little disdainful of 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 felt the deepest.

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

Although most of the time she appears as a facilitator, her understanding of this heavy industry machinery is far better than that of the average undergraduate graduate.

And Zhao Guoyang, after graduation, has not participated in the research and design of heavy machinery at all, and may not even have been in contact with heavy machinery products.

Because of this, his remarks are even more amazing and impressive.

While everyone was silently reviewing Zhao Guoyang's series of narrations, Ji Chongxuan, who had not been silent, suddenly spoke up.

He glanced at Zhao Guoyang, and then slowly said to his students: "Mr. Zhao just said, everyone heard it, right?"

"Dezhong, Chen Li, the two of you have studied with me for almost four years, how far do you think you are from Mr. Zhao in terms of understanding the electric drive system of the hoist?"