Chapter 486 Photoelectric Incremental Encoder
On Monday, the first day of work in 1961, Gao Zhendong received a call from the 12th Machinery Department.
Rotary encoders are not easy to import, so we might as well do it ourselves. As you said, we have to find you. No, our supporting factories have already been selected.
Gao Zhendong is quite happy to hear about this. He doesn’t even need to look for information, because he has dismantled the rotary encoder!
About an hour after Gao Zhendong put down the phone, someone came to the door of the third factory.
They came from other cities and just arrived in the capital in the morning.
Not that far away, Changshan Guangyang Electronics Factory, although it is also directly managed by the ministry, is different in scale and status from factories like 1274 and 1218, and is a whole level lower.
If they weren't in Changshan, they wouldn't have arrived so fast. The transportation is not so convenient these days.
The leader has the same surname as the director of the third rolling mill, also named Yang, but he is the chief engineer and not the director.
A young technician from the Guangyang Factory was waiting at the door while looking at the internal security personnel of the No. 3 Factory who were carefully checking their IDs. He whispered to Mr. Yang: "Mr. Yang, why is this place so strictly inspected?" ? We haven’t seen many that are so troublesome in other factories.”
"Keep your voice down. This is a big factory in the capital. There are regulations. If you don't know, don't ask around. Without a letter of introduction from the ministry, I guess we wouldn't be able to enter this gate today." Mr. Yang said softly to the young man. .
The internal security personnel had already checked the documents of several people and said politely to them: "Comrades, you have been waiting for a long time. Chief Engineer Gao has already said hello in advance. Please come with me." ”
The internal security of other factories may not be too polite, but the exception is the No. 3 rolling mill, especially the No. 3 rolling mill. No one knows which gods and Buddhas are coming to look for people. Please be polite. That's right.
But when his words were heard by the comrades in Guangyang Factory, it was a different feeling.
After saying hello and still checking so strictly, this is really different in Sijiu City.
While following the internal security comrades inside, Chief Engineer Yang told the people in the factory: "Be careful what you say when you go in. Even though this place is a branch factory, they are at the same level as our factory. This senior officer The chief engineer is an expert that the department attaches great importance to. This time he has taken time to guide us in developing new products. You must be polite.”
There are many young comrades among the technical staff, and I think there is an older one like chief engineer Gao. Comrade, I still don’t like people who are too out-of-the-box, Chief Engineer Yang thought.
The comrades from the Third Factory took them to the door of Gao Zhendong's office, stopped, and asked them to go in on their own. There were regulations in the system that they could not enter Chief Engineer Gao's office casually.
A few people walked into the office with a little anxiety and saw a young man sitting on the sofa, tall and smiling.
Maybe they are here to see Chief Engineer Gao, or they may be Chief Engineer Gao’s assistant. Such experts are busy at work.
Mr. Yang thought about it and said hello: "Hello, comrade, we are from the Changshan Guangyang Electronics Factory of the 12th Machinery Department. We were assigned by the department to come to see Chief Engineer Gao Zhendong. Is he here?"
< br>What happened next made the comrades in Guangyang Factory dumbfounded.
The young man stood up and stretched out his hand very enthusiastically: "Comrades from Guangyang Factory? I am Gao Zhendong, hello, hello."
This incident made Guangyang All the comrades in the factory were caught off guard and felt so unbelievable that they all froze on the spot.
Is this Chief Engineer Gao Zhendong? So young?
impossible! Absolutely impossible!
One young comrade even rubbed his eyes, as if he wanted to see more clearly.
Their factory is not in the field of computers, and they have never taken Gao Zhendong’s class.
Including Mr. Yang, everyone thought Gao Zhendong was a somewhat older expert or a middle-aged man.
When they saw the man in front of them who looked younger than the young comrades from their factory and introduced himself as Gao Zhendong, everyone was dumbfounded.
Judging from the importance the department attaches to this matter, its attitude, as well as the experience of entering the third factory, and the technical content of this matter, this should not be the case.
In Gao Zhendong's previous life, this matter could have been used as a headline to gain some traffic. "Shocking! The person who has mastered such technology is actually..."
Guangyang Factory The comrades fell into silence. Fortunately, Mr. Yang was also an old comrade. He had been through many storms and quickly came to his senses and stretched out his hands.
"Hello, Mr. Gao! I'm really sorry. We came right after receiving the task from the ministry. We came in a hurry. We don't know much about your situation, which made you laugh."
< br>Gao Zhendong didn't take it seriously either. This reaction was too normal for the technical staff and the person he met for the first time.
Shaking hands with the comrades from Guangyang Factory one by one, Gao Zhendong asked them to sit down.
While making tea, he smiled and said: "Comrades came very quickly. I just received a call from your department this morning."
Although you can ask the comrades from the branch factory office to come and organize , but he is still used to doing it himself. He was also very polite and did not say anything like "I am very motivated." This sounded a bit like a leader evaluating his subordinates, which was inappropriate. In fact, to put it into detail, Mr. Yang is still half a level below him, which seems to be justifiable?
“Our department attaches great importance to this matter. This device can fill the sensor gap. We are also very honored to be able to receive this task, so comrades are more eager and got on the train last night. ”
Changshan takes a train to Beijing, which is less than 300 kilometers. However, everyone knows the speed of trains these days. They are not fast in the first place. If you encounter the legendary steward, you can run more than 30 kilometers without hesitation. hour speed.
In my previous life, I could cover a distance in an hour or two. Nowadays, it is completely normal to run for most of the night.
Putting all the water on the coffee table, Gao Zhendong also sat down.
"I think all comrades know the purpose of this time, so we won't waste time and get straight to the point."
The comrades in Guangyang Factory were overjoyed and agreed, this is It's always better to be in a higher position, don't beat around the bush, don't go around in circles, just get on with it.
"What does your factory do originally?" Gao Zhendong didn't know much about Guangyang Factory.
Mr. Yang introduced his factory. The Guangyang factory makes rotary potentiometers. Anyone who has attended middle school physics has seen a sliding rheostat. A rotary potentiometer is similar to this thing, except that it does not slide in a straight line. The resistance is adjusted by turning the resistance ring.
Another product of their factory is a variable capacitor, which uses air as the medium to achieve variable capacitance by changing the projected overlapping area of two sets of multi-layer pole pieces.
These two devices are relatively common in circuits, but to say how much they have to do with rotary encoders, well, they can both rotate, so maybe they can barely be related.
Gao Zhendong has no objection to this. Since the 12th Machinery Department chose Guangyang Factory, it means that after all the 12th Machinery Department considered, Guangyang Factory should be the most suitable.
"So how much do you know about rotary encoders?" Let's see how basic they are.
“To be honest, Mr. Gao, we don’t know much about rotary encoders. What we do know about is rotary transformers, which seems to be quite difficult, especially the transmission part.”
< br>Gao Zhendong nodded: "Well, that thing is indeed difficult and costly. We don't do that."
This is beyond Mr. Yang's knowledge, even the resolver , they all learned about it temporarily. After all, there is no domestic production, and there is no information in this regard.
They couldn't think of any other way to achieve rotation encoding.
Seeing this situation, Gao Zhendong simply did some popular science and planted some seeds.
“In addition to the rotary transformer you just mentioned, there are several types of most common encoders, including mechanical, magnetic, capacitive, and photoelectric.”
This is relatively easy to understand, just listen. The name tells you what the principle is.
Gao Zhendong introduced them to the characteristics of these rotary encoders.
The mechanical action is reliable, but the accuracy and speed are quite worrying. If the accuracy increases, the price will also rise. Moreover, the speed is an innate flaw and cannot be saved.
Moreover, the main force in researching mechanical rotary encoders should be comrades engaged in machinery. It is meaningless to invent this thing in the 12th Machinery Department.
Magnetic, capacitive, and photoelectric have the same advantages: high precision, fast speed, few mechanical contact parts, wear resistance, and each has its own anti-interference scenarios that it is good at.
"General Engineer Gao, is it better for us to make capacitors? Our factory has experience in making variable capacitors." A comrade from Guangyang Factory raised his hand and asked.
Gao Zhendong shook his head: "At this stage, I don't recommend doing capacitance and magnetism. The reading and interpretation of these two signals are a bit like resolvers, which is a bit troublesome. And you do variable capacitance. Experience is useful in this matter, but not very useful.”
“General Manager Gao, you mean to make a photoelectric rotary encoder?” said Mr. Yang.
Gao Zhendong nodded: "Yes, the photoelectric rotary encoder has many benefits. It has a simple structure, easy processing and manufacturing, relatively low cost, and a wide range of applications. Moreover, its output is inherently digital pulse, which is innate for the control system to read. "It's very convenient."
Gao Zhendong said it relatively easily, but for the comrades in Guangyang Factory, it has opened the door to a new world. Everything is very novel. It turns out that there are so many ways.
Write it down. Even if you don’t do other types now, you might be able to use them in the future.
Mr. Yang still has a good grasp of the basic principles: "General Engineer Gao, the photoelectric encoder you are talking about should detect the on-off of light through the photosensitive element to realize the identification of the rotation state?"< br>
Gao Zhendong said: "Well, yes, when we just started, we just built a multi-turn photoelectric incremental encoder, or photoelectric relative encoder. This encoder has low cost, relatively simple technology and easy application. The range is also very wide, suitable for taking the lead.”
The name was so long and had so many new concepts that it immediately confused the comrades in Guangyang Factory.
(End of this chapter)