After all, Professor Chen is a person who has been engaged in digital circuit teaching and research for many years, and the "injection molding machine control system" scheme he proposed is also to replace the "relay panel" structure with the logic gate operation of digital circuits to achieve system control, and plans to use analog-to-digital conversion circuits for closed-loop control in some places where the running speed and stroke of mechanical parts need to be accurately controlled, and the "inverter" design scheme he proposed is to use "microprocessor" As the control core, the current conversion of AC-DC-AC is realized to control the speed regulation function of the AC motor.

After reading Professor Chen's "research plan", Zhou Jianhua asked him with a smile:

"Professor Chen, why do you only use the "microprocessor" as a unit in the "inverter" scheme instead of the "microprocessor" in the "injection molding machine control system"? ”

"Huh...... If a "microprocessor" is also used on the injection molding machine, wouldn't that be overkill? Professor Chen replied with a smile:

Although the application of "microprocessor" on the injection molding machine can facilitate my program design, and can also strengthen the control effect of this system, and can also provide more control functions to make the machine achieve higher control accuracy, but the cost of a "microprocessor chip" has to be hundreds of dollars, so it must be matched with the corresponding display output module and display equipment to play its maximum effect, so that the cost of only these two or three components will be thousands of yuan, which is not cost-effective! ”

Professor Chan paused, then added:

According to the relevant information I have learned, if you do not use "microprocessor" and only use digital gate circuit to replace "relay disk", its control parameters can already reach the level of "domestic leading" you require, and. This is a solution compared to circuits that use a lot of relays to achieve logic control. It has a lower cost and a smaller size. It is more suitable for the practical needs of the domestic market. Of course, this kind of technical solution is already relatively backward in foreign countries...... But I think that according to the principle of "small steps and fast running" you proposed, it should be more appropriate to design according to this scheme at present. ”

"Hehe, Professor Chen, what you said said to my heart. In fact. The reason why I ask you this question is just to understand your thinking. Zhou Jianhua replied with a smile:

"Definitely! In order to meet the requirements of "domestic leading", you should be able to achieve this goal with your plan. However, the reason why I only put forward the requirements of "domestic leading" rather than the requirements of "international advanced" level is because I am not able to provide you with this research and development condition for the time being-those necessary "microprocessors", "memory", "input and output modules", "display modules", display devices, and "programmers" and other components and equipment, I will not be able to prepare them for you in two months! This is also the reason why I said before that the research and development of "inverter" can be done within our ability and do preliminary research and technical reserves first. ”

"Oh...... No wonder ......" Professor Chen nodded with a smile and said:

So, you don't have any opinion on my "research plan"? ”

"Huh. Professor Chen, you probably don't know. From the very beginning, I developed these two products with the goal of bringing them into the international market. Zhou Jianhua replied with a smile:

"But I also know that Ruth walked step by step, and she had to eat one bite at a time, and it was impossible to become a fat person in one bite, so I could only use the domestic market as a reference for the time being. My current idea is like this - you first based on the country, contact a few more experts and professors in mechanical and electrical related majors to participate in it, as soon as possible to develop your current "domestic leading" level of "injection molding machine control system" program, and so that your results meet the requirements, after obtaining the 2,000 yuan bonus, and then re-CNC your program, and then take it 2,000 yuan bonus, and then, the next goal is to win the "inverter" bonus. ”

"Wow! Such a high bonus! The curious people around Zhou Jianhua and Professor Chen all exchanged their heads in amazement.

"Doesn't it mean that knowledge is power?! Knowledge is priceless! Zhou Jianhua glanced up at everyone and said with a faint smile.

"Professor Chen, you're going to get rich!" Someone said enviously.

"Huh...... It's not that I'm getting rich, even if I get this bonus, everyone will share it together. Professor Chen replied excitedly and crampedly, his chubby old face flushed.

"Professor Chen, I suggest that Professor Zhang also join your research team and become a member of your team." Zhou Jianhua looked at Professor Zhang, who was sitting on the side and looked at Professor Chen with slightly envious eyes, and said to Professor Chen:

"Professor Zhang is engaged in the research of semiconductor components, I suggest that the pre-research of "inverter" can be done by Professor Zhang first, after all, "inverter" equipment needs to be applied to some new power electronic devices, in the characteristics of components, Professor Zhang should be more experienced. In addition, I would like to suggest that you find another professor who specializes in mechanical engineering to join your research team, so that he can devote himself to the research of "injection molding machine control system" with you - the combination of strong forces can produce results easily and quickly. Hehe, don't forget, after a while, there will be people from other scientific research institutions competing with you for the prize. ”

"Hmmm! You're right! Professor Chen nodded and said:

"I originally had the idea of inviting Professor Zhang to participate in the work with me, but I haven't thought about this separate research, you say so, I now also think that it is more appropriate to ask Professor Zhang to do the preliminary research of "inverter", he can completely according to the "inverter" technical path I have drawn up, first do some pre-research work, in terms of power semiconductor devices, Professor Zhang is better than me! Moreover, not only the "inverter", but also the "injection molding machine control system" also need to use power semiconductor devices, and Professor Zhang should be able to participate in the "injection molding machine" project together while pre-researching the "inverter". ”

"How about it, Professor Zhang, I wonder if you are interested in participating in the research of these two projects?" Zhou Jianhua turned to Professor Zhang and asked with a smile.

"Ah...... Yes! No problem! Hehe......" Professor Zhang replied in surprise:

"Although...... Belch...... In both cases, I was only able to work on a small part of the R&D work, but both projects were quite interesting! I'm interested! ”

"Professor Zhang, although you can only participate in a small part of these two projects now for the reason of your professional direction, a year later, when these two projects have achieved phased results - to be precise, when these two projects can reach the "international advanced" level and can be promoted to the international market, then I will have a project that is in line with your professional direction to invite you to participate, that is, - the research and development of "integrated circuit technology", of course, At that time, experts and scholars from other related specialties will also participate. ”

"Oh?!" The research and development of integrated circuit technology is a very expensive thing...... Professor Zhang looked at Zhou Jianhua in surprise and muttered.

"yes, so, we can't do it yet. I pin my hopes on these two projects now, only when these two projects are successful, we may have funds to invest in them......" Zhou Jianhua nodded slightly, and said with a solemn expression:

"The research and development of "integrated circuit" technology is not my own business, nor is it just the cause of a few of us, this is the cause of our entire country! Each of us can only do our part for this cause and strive to contribute to the development of China's electronics industry. ”

"Xiao Zhou, I really didn't see it, you are a small person with big ambitions!" When Professor Zhang heard Zhou Jianhua say this, he couldn't help but say with emotion:

"The foundation of China's electronics industry is too weak, and it is decades behind! Of course, this is caused by historical reasons, and we can only catch up now to keep up with the pace of development of the international electronics industry. But it's hard! The country's economy is weak at present, and it is impossible for too much money to invest in technological research and development, and moreover, to develop a technology, it is not enough to have money alone -- if a technology cannot be quickly applied to production practice, and is constantly improved and developed in production practice, then this technology will soon become outdated, and the initial investment will be wasted, resulting in a huge waste of technological resources......

"Yes! Over the years, seeing a lot of this kind of situation makes people depressed! Professor Chen also said with emotion at this time:

"Often we develop things that are not used by enterprises, occasionally a few technologies are not easy to promote to enterprises, and people have no interest in continuing to improve and improve, as long as they can make do with it, we can't get any feedback on what problems, alas! Most of these enterprises have no motivation for technology research and development, improving labor productivity or improving product quality, and they are not serious! If these technologies are not perfected through application, how can our technology be steadily improved......"

"Hehe, so the country is going to carry out reforms now!" Zhou Jianhua replied with a smile:

"You see that Nandu Machine Pump Factory is a pilot unit of "state-owned enterprise reform", and now it is booming, and even large-scale computers are available! ”

Zhou Jianhua turned his head to look at Ren Zhongfa and them, Ren Zhongfa was holding cigarettes and the people from the technical department in the factory, as well as Li Yongping, who sent Cliff back, to join in the fun.

After Ren Zhongfa signed the cooperation agreement with Zhou Jianhua just now, he was not in a hurry to leave immediately, he was also curious to see what projects Zhou Jianhua and several university teachers were talking about, and he also wanted to see how the beautiful female reporter of "Jiangnan Daily" interviewed Zhou Jianhua...... (To be continued......)