Chapter 493 Three Frame Esports
Gao Zhendong pressed the main switch and turned on the machine. At the same time, he twisted open a valve on the gas cylinder next to him, and a "hissing" sound came out.
The cooling of this prototype still uses a vortex tube. I still asked the Institute for this, and I asked for several.
As for the air source, Gao Zhendong found a large compressed air bottle and connected it, which was able to meet the requirements of long-term testing.
There are several large bottles like this next to them.
With the "hissing" sound of deflation, the temperature of the line array gradually dropped. On the DJS-60D interface, a temperature value kept jumping downwards, and the data came from a thermocouple.
“280K”
“275K”
“…”
This is one of the shortcomings of the refrigerated thermal imaging camera, you have to wait for the refrigeration to arrive Predetermined temperature.
The first batch of the "Javelin" individual anti-tank missiles boasted by Citigroup were extremely difficult to use. The cooling head was a major culprit, and another major culprit was the cumbersome operating procedures. Later, the operating procedures were modified, but the cooling head was still the same.
As for our later similar individual ammunition, well, it is said that we used a non-cooling head, which did not require refrigeration.
But this was the 1960s, and cooling thermal imaging cameras were already popular, so don’t think too much about anything else.
Finally, the prototype made a beep sound, and in the optical scanning system, the polygonal mirror began to rotate slowly.
The current rotation speed is far from enough to generate a video, because Gao Zhendong’s idea is to try generating a picture first.
If you can generate a single frame image, continue going down.
And he uses a computer to process sensor data to form an image, rather than using the sensor output signal to directly drive the display. There is a big difference between the two.
The former cannot get smooth video animation at all when the computer speed is slow.
The circuit of the latter is more complicated, and Gao Zhendong has not done it yet. Many details of the thermal imaging camera extracted are different from the one made by Gao Zhendong, and cannot be directly replaced.
The target of the prototype observation is a car on the first floor outside the window it overlooks. It is the car left for Gao Zhendong by the No. 3 Factory. Although it is pitch black outside and can hardly be seen, it does stop. There.
The comrade who was driving received a strange order today. He drove the car to a designated location in the open space below Chief Engineer Gao. Then at night, he let the engine idle and turned off all the lights. He did nothing else and just waited.
There is no need to look at the tanks, let’s look at the cars first.
On Gao Zhendong's computer screen, 64-pixel dots gradually appeared column by column. It could be vaguely seen that it was a regular image, not random noise.
Gao Zhendong was excited, as if he had a way!
This is the first thermal imaging camera that I have tried my best and made by hand, and it is also the first in the world!
Gao Zhendong regretted why he set the optical scanning speed so slowly. It was too torturous, one column per second, and a total of 96 columns needed to be scanned!
Even if today’s computers are very slow, one column per second takes a ridiculously long time. In fact, Gao Zhendong wanted to expose it for a while, so that at least one image could be produced.
The 64 pixels are very rough, but as the columns were presented one by one, Gao Zhendong could still vaguely make out the outline of the small half of the car. Look, these are the headlights!
The headlight looks like three or four pixels high. If you look at this small group of pixels alone, you would never imagine that it is a car headlight. However, the rendering ability of the human brain is very strong, commonly known as brain augmentation. , as long as you put it in the entire environment, you can see it.
The image is still being scanned column by column, and the entire picture is slowly revealed.
Although the effect is very poor and there are no details, there is no doubt that this is a car, a car in the night. The brightest part is its hood, and underneath that is the hot engine!
Gao Zhendong laughed loudly, yes, yes! We have a thermal imaging camera!
Although it is very primitive, although it is very slow, although its pixels are only 96*64, this is a thermal imaging camera, a thermal imaging camera that can clearly see the enemy in the night !
The comrades working the night shift in the No. 3 Factory heard a burst of "hahaha" laughter coming from Chief Engineer Gao's office. Many comrades thought something had happened to Gao Zhendong and were rushing to his office. .
Then I heard voices from behind, "Fuck you!", "It's done!", "Now let's see where you run!"
Oh, it turned out that they were doing research, and it sounded like it was successful, so it was okay, and everyone dispersed.
Gao Zhendong recovered a little from his excitement and observed the picture carefully.
He brought up the original grayscale data of this picture, and there is good news and bad news.
The good news is that the original grayscale of the image is richer and has more grayscales than the monitor.
Bad news, the monitor cannot support the perfect display of this data.
That doesn't matter, Gao Zhendong is basically satisfied with the effect of the current display. On a whim, Gao Zhendong processed the grayscale image and made it into a two-color image, that is, there are only two grayscales, either black or white. He was happy to find that even at this quality, he could still vaguely see some Valuable information comes.
“Great!” Gao Zhendong fisted his palms and shouted.
The richer the grayscale information of the image, the more things the computer has to process. However, the performance of computers these days is so bad that it is impossible to process too large data.
If you are talking about a simple thermal imaging camera, just take a look, you can also directly use the conversion circuit and use the temperature difference electromotive force signal of the linear array to directly drive the display display, then if you want to realize automatic thermal imaging Guidance requires computers.
This effect of the thermal imager output is undoubtedly extremely beneficial to the automatic processing of thermal imager data by computers. Of course, it is impossible to use a two-color image as extreme, but at least it can achieve a balance by reducing the gray scale.
Gao Zhendong walked to the window and adjusted the focus of the thermal imaging camera prototype. Just now, he zoomed in on the car to almost fill the entire screen. Now he has zoomed out the car much further in the lens.
It’s been more than a long minute again. This time, the details of the car are not as rich as before. It can’t even be seen as a car, but in the picture, it still appears as a bunch of bright pixels. , at least it can be judged that this thing is different from the background.
Gao Zhendong began to adjust the parameters with great interest, testing the imaging capabilities and processing capabilities under various conditions.
The results may be good or bad, or it may not be called bad, but it may be called a certain gap from the ideal.
The good thing is that he found that even if the optical scanning system completes the scanning of a picture at 20 frames/second, the line array infrared sensor can still output data of sufficient quality, and there is still potential to be tapped.
This means that the scanning hardware is enough to support smoother video generation. The typical response speed of the human eye is 25 frames/second. If it exceeds this speed, people will think that the video is smooth and coherent.
Although the target will move during the scanning process, causing problems such as smearing in single-frame images, based on the typical speed of a tank of 60km/h, 0.05 seconds is only enough for the object to move less than one meter, and the distance If you zoom out a little further, it's almost as if it hasn't moved, which is generally acceptable.
The bad news is that no matter how hard the DJS-60D works, the number of pictures it can read and display in one second is only a few. This is not a thermal imager anymore, but a A thermal imaging camera.
But this bad news is not a big problem. The first thing to solve now is the sighting. You can directly use the output signal of the line array to drive the display, which will be much faster.
In some applications, the comprehensive performance of digital cannot match that of analog. This is commonplace at this time, just like the tram was actually invented earlier than the diesel locomotive, but the outbreak of the tram occurred more than 100 years after its invention.
Gao Zhendong worked non-stop, setting the scanning speed at 20 frames per second, and the computer processing interval was to finish processing the previous one and then read the latest one for processing, to see how fast it could run at the limit .
Everything was ready, Gao Zhendong picked up the walkie-talkie and called the driver comrade downstairs.
"You drive the car and circle around here downstairs, yes, just circle around within this range."
The GAZ-69 downstairs started running happily, Gao Zhendong Staring at the computer screen, I saw the bright pixels representing the car jumping across the screen.
The final result is about three to four frames per second.
Gao Zhendong is very satisfied, the speed is not bad.
Playable in one frame, smooth in two frames, and e-sports in three frames!
He asked the driver comrade to stop the car and take a rest after get off work.
As for himself, he began to design a circuit for the thermal imager signal to directly drive the display with reference to the thermal imager extracted from the system.
The next morning, after Gao Zhendong repeatedly checked the circuit diagram, he called the electronics laboratory of the third factory and asked them to come and pick it up and make it as quickly as possible.
The third factory does not have a dedicated electronics workshop. It is too large and unnecessary, but it is equipped with an electronics laboratory that mainly serves Gao Zhendong.
Comrades from the electronics laboratory came over and took away the circuit diagram. Gao Zhendong asked someone to bring food back from the cafeteria. After eating a few bites, he turned around and lay down on the sofa, pulled up his coat, and fell asleep. .
On this day, everyone who came to see Gao Zhendong was stopped. Those inside the No. 3 Factory were stopped outside his office, and those outside the No. 3 Factory were not even allowed to enter the reception room.
The comrades in the electronic laboratory are very fast. Anyway, the third rolling mill originally did not have such skilled workers, and I don’t know where they came from. That night, the welding was completed and they were cleaned. The circuit board was sent back to Gao Zhendong.
Gao Zhendong replaced the conversion drive circuit into the system, connected its video signal output to the monitor, and then picked up the walkie-talkie.
“Keep running!”
The GAZ-69 started up with a rumble and continued to have fun in the open space on the first floor.
Another night passed, and at nine o'clock in the morning, Mr. He, who was in charge of the firepower department of the Prairie Tractor Factory, received an email just after he went to work.
The email was from Gao Zhendong, and it only had two words.
"Come quickly!"
(End of this chapter)