Chapter 807: Put all the functions in place!

Gao Zhendong didn't know what results the "Research and Suggestions" he submitted would get. Anyway, he felt that he needed to give a reminder. After all, he was quite clear about the extent to which these new things could bring about changes.

Maybe some things are popping up, but a real man knows what to do and what not to do. It would be pointless to be hesitant at this time.

He is now receiving several people, comrades from a unit of the Defense Work Committee who are responsible for timing equipment. This equipment is not only for any particular military branch, but is some general equipment.

This group of comrades were actually those who went back to prepare military electronic watches after Gao Zhendong released the electronic watches. They were responsible for the specific implementation.

When Gao Zhendong was adjourning the meeting, he specifically told the comrades from the Defense Work Committee that if they wanted to make a military electronic watch, they should come to him before starting. These comrades came to him specifically for this matter.

"Chief Engineer Gao, after the leaders of our Defense Work Committee returned, they informed the comrades in the army about the relevant situation of electronic watches. They were very interested in this lightweight, accurate and highly reliable timing device, and finally asked our unit to be responsible for this matter. This time we came here to learn from you."

For this unit, the comrades who attended the meeting at that time were already leaders.

As for the troops, if they want to achieve good tactical coordination, having a set of timing equipment that everyone can trust is naturally one of the basic conditions, so it is understandable that they are interested in this thing.

"Oh, yes. At that time, I told the comrades of the Defense Working Committee to ask the comrades in charge of this matter to come to me. It seems that you have got this task." Gao Zhendong said with a smile.

"Yes, it was us. We were also very nervous when we received the task. The direction we could think of was mainly the dustproof, waterproof and shockproof aspects you mentioned. We couldn't grasp more directions at the moment."

Gao Zhendong didn't say anything more. He turned around and took out a form. He had drawn this form a long time ago, just waiting for today to add all the functions to it for me!

"This is the function table of the high-precision military timepiece I'm considering. Take a look at it."

The other party didn't expect that Gao Zhendong had already prepared everything, and took the function list with joy.

I was dumbfounded when I saw this. I didn't expect there were so many. Some of them were understandable at a glance, but some were completely incomprehensible. The function definition was fine, but I mainly didn't know how to implement it.

"Boss Gao, some of these are easy to handle. We have considered them, but they are not so systematic."

The other party pointed to the "Basic Functions" section. Functions like alarm clock, timer, calendar, countdown, and button backlight are all easy to understand. They can even think of how to do them at a glance.

"Well, the basic functions are not difficult. But you have to pay attention that the alarm clock must provide a vibration function, and the ringtone can be turned off or even canceled directly. Sometimes comrades using this thing may not be able to hear the ringtone conveniently." Gao Zhendong did not want the watch on his wrist to beep while the soldiers were lurking, so he made a special reminder about this.

"Okay, we'll remember that." It's no wonder that when the comrades saw the alarm clock, their first reaction was to put the entire piezoelectric ceramic piece on it. It was not until Gao Zhendong reminded them that they realized that this thing was a bit inappropriate.

This also reminded them that they really cannot be careless when it comes to details.

"Chief Engineer Gao, you mentioned an altimeter here. How do we deal with it?" The comrades who are engaged in timing equipment really have no experience in this area.

"You just need to bring a small barometer in. In this regard, you can ask comrades from the 12th Ministry of Machine Building for support. They are good at this." Gao Zhendong casually referred the matter to the 12th Ministry of Machine Building.

"The altitude is calculated by air pressure, but wouldn't that be inaccurate?" Air pressure is not constant. At the same location, the air pressure will change in different weather conditions.

Gao Zhendong smiled and said, "It's not very accurate, but for the troops, it doesn't really need to be too accurate. For example, at different altitudes, the weapon's firing table is different and needs to be selected according to the altitude. However, the altitude marked on the firing table is actually quite coarse and not really accurate to the meter. Other things are similar. For officers and soldiers, it is basically enough to know a rough altitude range."

"Isn't the barometer too big?" Some comrades thought more about it.

"It's not a big problem. If it really doesn't work, you can make the watch a little bigger. It doesn't even have to be a watch. It can be a timing device that you can put in your pocket." The main purpose of this kind of thing is to achieve functionality, and it is not very important how it is worn.

Gao Zhendong added this device to the military timer mainly because he thought it might be useful on the plateau. The combat area and altitude are not fixed. Being able to grasp the approximate altitude in real time is useful for the use of weapons. "Can we add an electronic compass?" Now that we have the altitude, can we also solve the problem of direction? In addition to the magnetic compass, there is also an electric compass on ships and planes. Comrades came up with this idea.

Gao Zhendong shook his head: "There are no electronic compasses that small now, and the troops have special multi-functional compasses. This function is not very necessary. Let's wait for the technology to develop. Of course, if you can solve the problem of miniaturization of electronic compasses, it is not impossible to increase it. This is up to you to decide."

The comrade who asked this question was relatively young, and he stuck out his tongue playfully. It seems that this thing really needs to be put aside for the time being.

"Chief Engineer Gao, what about this automatic time synchronization..." If they could still figure out something about the altimeter, the automatic time synchronization was what they really couldn't figure out. They had no idea how to do it.

Gao Zhendong did not answer directly, but asked a question: "Are there any comrades in your research group who are engaged in communications?"

A comrade raised his hand and said, "I know a little about radio." I really didn't expect that making a watch would be related to communications. There are very few people with this talent in the team. Not to mention them, even across the country, there are not many people who are seriously engaged in communications.

Just like later generations often misunderstand that people who do DIY are those who work in computer science, these days, if you know a little about radio, you can barely be said to be engaged in communications.

"It's good to know a little about radio. You can write down what I say. You may need to cooperate with the Military Communications Institute later. This thing is more troublesome. You can do without it at the beginning and integrate it into the table when it is mature."

Hearing Gao Zhendong's words expressing his lack of confidence in them, the comrades working on the military watch felt a little discouraged, but at the same time they secretly made up their minds to make sure this thing was included in the military watch.

"To achieve automatic timekeeping, several things are needed. One is a timekeeping station, two is a suitable communication band, three is a suitable timekeeping protocol, and four is that the watch needs a certain data processing capability, especially for military watches, the timekeeping signal must be encrypted."

Especially the fourth item, time synchronization without encryption means, which means that the enemy can easily send interference signals to disrupt the automatic time synchronization function of the watch.

The comrades were full of ambition just now, but now they are suddenly confused by Gao Zhendong. Is it so complicated?

Well, let's learn one by one. Even if you can't figure it out in a short time, at least you can learn the technology first.

"As for the timekeeping station, if it is a military watch and is only responsible for timekeeping at the campaign level, then it does not need to be too large. The power and antenna requirements are not that high. It can cover tens to a hundred kilometers. With the current level of technology, it is possible to put a timekeeping station of this specification on a car and run it everywhere."

Gao Zhendong wanted to develop automatic timekeeping not just for the sake of a few watches, but watches can be considered an entry point and the most easily understood application method.

In order to cover as many places as possible and without the need for mobility and self-defense, ordinary radio time stations are extremely large. Taking my country's later BPC as an example, the ground wave range is 1000 kilometers, the sky wave range is 2500 to 3000 kilometers, the transmission power is as high as 100kW, and the antenna height is about 250 meters.

However, in the campaign level, there is no such high requirement, and the whole car can just run around.

"Chief Engineer Gao, with such a large communication range, the only way is to use long waves, right? The communication rate of long waves is very low. Can it meet the requirements?"

It seems that this comrade is being modest when he says that he knows a little about radio. He really knows more than a little.

Gao Zhendong smiled and said, "The communication range is not that big, but we are going to use long waves, which can be reflected by both ground waves and sky waves, and can achieve very long coverage. For the specific frequency, choose one between 20kHz and 80kHz. You can discuss and determine the specific frequency with the comrades in the Military Communications Institute. I don't know much about the current frequency band occupancy, so I'll ask them to know."

"As for the communication rate you mentioned, your judgment is correct. Long waves are indeed very slow, but for automatic timing, it is sufficient. Let me give you an example. Taking 68kHz long waves as an example, I have estimated that it takes 20 seconds to send a timing packet. Even if a lower frequency is used, it will only take one or two minutes to solve the problem. There is no problem for timing. Don't forget that electronic watches themselves are very accurate. If the timing is not received, it is not a big problem in a short period of time."

When Gao Zhendong was working on telemetry systems in his previous life, he studied BPC low-frequency time code synchronization. However, he gave up that line of work after GPS and CDMA timing were used. However, he still remembered the technology and could talk about it very clearly.

"As for the timing protocol, you can ask for permission from the Defense Work Committee and communicate with the comrades who are responsible for the tactical communication protocols to add the timing protocol to the tactical communication protocols." Gao Zhendong gave them an idea.

(End of this chapter)