In the conference room, when Zhao Guoyang talked about the synchronous motor transmission hoist, Ji Chongxuan's eyes were condensed.

When this Germanic elevator was first released, Ji Chongxuan was entrusted by the state to develop the electrical control system of this synchronous motor transmission elevator.

Unfortunately, without getting the core information of the original electronic control system samples, Ji Chongxuan and his research team still had to return in a miserable way after two years of hard research.

This incident has always been an indelible shadow in Ji Chongxuan's heart.

At this time, I heard Zhao Guoyang mention the world's first mechatronic integrated elevator again, and the sadness in Mr. Ji's heart surged up instantly.

Zhao Guoyang didn't know what Ji Chongxuan was thinking at this time. After a moment of pause, he continued to tell.

"The emergence of the mechanical and electrical hoist has led to the rapid development of lifting mechanical and electrical transmission technologies. At the same time, the development of electronic technology and computer technology has made the electrical control system of the hoist more rapid..."

When Zhao Guoyang said this, Chen Li raised her hand and asked: "Mr. Zhao, did our country start to gradually apply the electrical control system in the late 1980s?"

"But what you mean, it seems that there were already relevant technologies abroad in the early 1980s. Is this possible?"

Chen Li's words resonated with Xu Linlin and Kong Dezhong.

When Ji Chongxuan gave them a lecture, he had a detailed introduction to the application of domestic electrical control systems.

However, Mr. Ji did not talk much about the due and development status of this technology abroad.

The reason is very simple. After all, the three of them are still in the early stage of contact with electromechanical theory. If they instilled the Western technical theories too early, it may cause the situation of enlargement and growth.

Therefore, during the lecture, Ji Chongxuan deliberately avoided the field of foreign electronic control technology.

At this time, Chen Li asked such a question. Zhao Guoyang thought a little and understood the good intentions of Mr. Ji to educate the three of them before.

However, now that they have begun to involve real product research and development, Zhao Guoyang feels that there is no need to avoid some of the previous taboos.

So Zhao Guoyang looked at Ji Chongxuan with his inquiry gaze.

When he saw Mr. Ji nodding slightly and looking encouraging, he immediately made a decision.

Turning to Chen Li, he explained word by word: "Class Chen Li, there have not been many reports on the development of electronic control technology in the international community, so that everyone has misunderstandings about this."

"In fact, as early as the mid-1970s, foreign countries had already applied programmable controllers (PLCs) to the control of elevators. The representative of this aspect is still Siemens, so let's not mention it for now."

"In the early 1980s, computers were widely used in the monitoring and management of hoists. After combining computer and PLC technology, the automation level, safety and reliability of hoists reached a new level."

"And, the application of these two technologies provides people with a new and modern means of management and monitoring."

After a few seconds, Zhao Guoyang paused and continued to talk: "Other important point I mentioned is that during this period, some large elevator manufacturers, such as Siemens, ABBA, and ALSTHOM, have made full use of new technologies and equipment to develop and improve the safety protection and monitoring devices of the elevator."

"It can be said that the application of several technologies in the early 1980s has made the technical level of the elevator make a rapid progress..."

After Zhao Guoyang's story was finished, the members of the technical department of the "SMS Company" who attended the meeting all showed a very shocked expression.

As a mining machinery and equipment industry for more than ten years, their understanding of the development history of mine hoists is far inferior to the chairman in front of them.

Such facts make the guy feel ashamed of himself, and he is more of an admiration for Zhao Guoyang's knowledge.

The engineer with the technical department couldn't help but ask his companion in a low voice and said, "Old Lu, what is our Mr. Zhao? He is afraid that he will all get into a university lecturer when improving his understanding of machinery?"

"It's not just a university lecturer. I think even if the professor comes, our chairman may not know much."

An older technician around him said seriously: "The most important thing is that our chairman's calm face looks like he just said it was just a little fur. Such confident eyes are really amazing!"

Just as these technicians were talking in the audience, Zhao Siyan, who was sitting next to Zhao Guoyang, looked at this peer with admiration.

Zhao Siyan had experienced the extraordinary nature of Zhao Guoyang very early on.

Whether at the Songjiang International Auto Show or at the technical seminar established by Jinling Automobile Group, Zhao Siyan witnessed Zhao Guoyang's amazing performance with her own eyes.

However, those two times I was just a bystander, not a participant. Apart from amazing at Zhao Guoyang's performance, I did not have many senses that put myself in my shoes.

And this time, the situation was completely different.

This "Mine Lift" project has been spent a long time collecting information and carefully preparing for it.

Zhao Siyan believes that even Li Zhaohe, the vice president of technology, may not be stronger than himself in his understanding of "mine elevators".

Just when Zhao Siyan secretly felt that she might be able to help Zhao Guoyang this time and stand alone, Zhao Guoyang's casual explanation made her "dumped into dust" again.

Of course, Zhao Siyan didn't have the intention to compete with Zhao Guoyang in her heart.

Her only hope is to try to show her abilities in front of the other party and not be left too far away by the other party.

Unfortunately, after seeing the current situation, Zhao Siyan could only secretly say to herself in her heart: Zhao Siyan, it seems that you have to continue working hard. This guy from Guoyang is really not that easy to catch up!

After the voices of the people in the audience gradually lowered, Zhao Guoyang continued to speak: "Just now, I will talk about the development of mine hoists internationally. Let's talk about the domestic situation."

"I've already said it when I just told you. From the mid-1970s to the early 1980s, it was a golden period for the rapid development of various technologies of elevators, and many new technologies were applied to actual operations."

"However, with the rapid advancement of science and technology abroad and ushering in rapid development, the development of domestic elevators, especially the research and development of electronic control systems, have been in a very backward situation for a long time!"

As soon as Zhao Guoyang finished speaking, the muscles on Ji Chongxuan's face trembled slightly.

This time, Zhao Guoyang happened to catch a glimpse of this scene and understood something in his heart.

Zhao Guoyang was already very aware of the current situation of backward technical level of heavy machinery such as elevators and excavators in China.

Speaking of which, this backward situation has nothing to do with the knowledge of the experts and scholars in China at that time.

The main reason is that my country's industrial foundation is too poor and its starting point is too low.

Just like the patent of "DC all-digital new electronic control system", it may not have been thought of by anyone in China before.

However, after they really studied in depth, they were tied up by "stumbling blocks".

Problems such as the failure to reach the rated power of the DC motor, the insufficient maximum input speed, and the inability to reach a stable state, all restrict the imagination and creativity of domestic technicians.

In Zhao Guoyang's view, the reason why domestic technical experts cannot quickly reverse this situation is really a "crime of non-war".

No matter how emotional he was, Zhao Guoyang still wanted to continue saying some of the words.

He let out a sigh and then opened his voice: "According to what I have learned, so far, the mine hoists, the electronic control systems of our country are serving, and most of the AC speed control systems of rotor loop string metal resistors."

"This kind of system equipment is outdated and technology is backward, and it is far from keeping up with the development of the times..."

"The technical backwardness of the electronic control system has also made our domestic elevators lag far behind the international advanced level in terms of safety and reliability."

Zhao Guoyang sighed, and then opened his voice: "Most of our domestic mine hoists lack effective speed monitoring devices in key areas and the deceleration sections of the upper and lower wells, which can easily cause some sudden accidents."

"So, just in terms of elevator control technology, we are more than a little worse than abroad."

Speaking of this, Zhao Guoyang may feel that what he is talking about is too negative, so he changed the subject and said, "Of course, everyone doesn't have to be too discouraged. After all, the level of mine hoisting machines in our country has been improving."

"In the mid-1980s, our country introduced more than 20 sets of thyristors-DC motor control systems from Sweden, Germania and other countries."

"Although it is imported from the original and then installed on our own products, it can also fill the gap in the DC electric control of domestic elevators."

"As for the purely domestic 'DC electric control system', it has not been released yet. Perhaps, this product from our SMS company will be the first pure domestic product in the strict sense..."

Zhao Guoyang's last sentence is somewhat humble.

In fact, after his patent for "DC all-digital new electronic control system" was approved, it is no longer possible for domestic individuals or enterprises to surpass SMS companies in this regard.

After Zhao Guoyang finished speaking this paragraph, he turned his attention to Xu Linlin who asked the question.
Chapter completed!