Chapter 277

Chen Xin didn't worry too much about the surge of vegetable production. As long as the vegetables are not harvested, they will not be bad if they are planted on hydroponic plates all the time, but the taste will get old.

But it can't be left alone. While thinking about how to improve the exoskeleton, Chen Xin is also thinking about how to deal with the surge of vegetable production.

Although the number of people in the shelter is much more than before, and the consumption is also increased, compared with the surge of production, the increased consumption is really not worth mentioning.

After all, it's vegetables that add up to nearly two or three thousand kilograms. According to the agreement between Chen Xin and the special police force, so many vegetables need to be traded to them for a quarter. Eight people in the shelter reserve about one tenth of their share. At present, some chickens and fish can be consumed, but more than half of them are still left. At least more than 1500 kilograms of vegetables need to be considered.

More than 1500 kilograms of vegetables, if it is before the disaster, dragged to the vegetable market may be sold out in a day or two, it is not a matter at all.

Now, after the disaster, although it is also a very tight supply, if Chen Xin is willing to sell more, people want to buy it, but Chen Xin doesn't want to exchange these vegetables for a lot of things that he can't use.

But Chen Xin still wants to get rid of the more than 1000 kilograms of vegetables. Especially when he brings back sweet potato seedlings from his hometown, he needs to set aside a layer of planting plate in the greenhouse to plant them. Chen Xin can't let these vegetables still occupy the planting plate.

What's more, he has to find a way out for the extra output every month after the planting area in his greenhouse has expanded and the output has doubled.

The trading volume of the special police force can be expanded a little, but considering what can be exchanged, the potential of this part of trading share is limited. Chen Xin exchanges more shelter rations and living materials every month at most.

He can get this part of things from other people, especially when Chen Xin is cooperating with the state. Other things may be a little difficult, but even if Chen Xin asks for food and living materials, he can get them.

So after thinking about the pros and cons, Chen Xin decided to let Li Yulong sell the rest of the deal in his market, except for expanding the fixed deal with the SWAT team.

On the one hand, this is a kind of support for Li Yulong's trading market, adding fresh vegetables as marketable goods, which can help the trading market better open up the situation.

On the other hand, it can also be regarded as an investment. Since Chen Xin doesn't know what to exchange for, it's better to use these vegetables as an investment to help Li Yulong. In this way, he can get more returns.

And this is also to find a way to consume the monthly increase of vegetable production, so as not to find a market for the increased vegetable production.

After learning about Chen Xin's decision, Mo Qingyan didn't express any opinions on this matter. She just confirmed to him the harvest time of crops in the greenhouse, so she didn't say anything more.

In the face of Mo Qingyan's indifference, Chen Xin feels helpless for a while. But with his parents around, Chen Xin is really not good at dealing with this kind of emotional problem. In addition, he really treats Mo Qingyan as a friend all the time, and does not develop the idea of a relationship beyond friendship. He can only put this matter on hold for the time being and deal with it coldly.

After dealing with these things, Chen Xin continued to put his energy into the improvement of the exoskeleton mechanical structure. After all, this is what he is most concerned about right now.

For the lack of joint flexibility of exoskeleton, Chen Xin first adjusted the movable range of each joint and increased the movable angle of each pendulum connection.

After the adjustment, the flexibility has been improved to a certain extent. At least now Chen Xin can take off the helmet on his head without wearing an exoskeleton.

But the movable range of the shoulder joint is still insufficient, the arm can only be lifted flat, unable to extend backward and upward.

This is mainly due to the limitation of the structure itself and the need to install a hydraulic telescopic rod for power assistance.

After all, joints, as the main moving parts, are also the main power points. While adjusting the flexibility of joints, Chen Xin must also consider the problem of power assisted mechanism.

Elbow joint adjustment is relatively easy, because the elbow angle itself is not too big, through the hydraulic telescopic rod length adjustment, it can make do.

But the adjustment of shoulder joint is not so simple.

There are two active joints in the shoulder joint, one of which is an axis perpendicular to the back, which is located in the position of the human scapula. The structure of the whole exoskeleton arm part is connected to this axis, thus connecting with the main body of the exoskeleton, which is also the main joint of the arm part that can swing forward and backward.

The motion of this joint is that the shaft itself is fixed, and other structures connected to the shaft rotate around the shaft. Limited by the structure itself, and the swing range of the arm is not too large in actual use, the shaft can only swing 0 ° to 70 ° in a limited way, and it can reach 90 ° after adjustment. Although it is not very flexible in use, it is enough.The rest is a shoulder joint, which is a typical pendulum connection. It is responsible for connecting the axial joint structure of the back and the main part of the arm. It is the most important activity joint of the whole exoskeleton upper limb, and also the joint with the largest range of activity.

In theory, these two joints can make the arm swing back and forth, but because of structural problems, the swing range of the shoulder joint pendulum is only 0 ° to 120 ° now. This swing range can't even respect the French military salute. It can only respect the German military salute during World War II.

To improve this joint, other connection methods will only make the structure more complex. Although the flexibility is increased, the installation of the booster becomes troublesome.

Chen Xin has considered using universal joint, magnetic suction joint and spherical joint of air bearing as the connection method, but the effect of the samples is not ideal after trial, which will not only make the structure of exoskeleton more complex, but also interfere with the assist structure. In fact, the flexibility that can be improved is limited.

This makes Chen Xin very scratching his head.

Chen Xin can't really think of a way to improve it. After a bout of irritability, Chen Xin chooses to leave the table full of useless plans and decides to play a game to relax. By the way, he also wants to find inspiration from science fiction games.

After turning on the game console, Chen Xin holds the handle to pull the game. Halo and mass effect have little reference value. They are power armor. The structure of the whole body is totally different from the exoskeleton structure of just two iron bars.

It is the exoskeleton in call of duty 11 that makes Chen Xin feel bright in front of his eyes, but after careful observation, he can only learn from it in part.

In call of duty 11, the exoskeleton back is fixed, but the shoulder directly uses the same spherical joint as the human body structure, and two spherical joints are connected, providing enough flexibility for the shoulder.

Of course, this kind of structure can be used, but the friction surface of the spherical joint is too large, and if we want to ensure enough flexibility, we can not use the fixed structure. We can only wrap it with flexible materials or simply make it into magnetic absorbers like human joints.

Of course, rubber is the first choice for flexible materials, but now the rubber can only be synthesized in industry, and it is easy to become brittle and lose its original effect in the low temperature environment of minus tens of degrees. In the case of magnetic absorption, how to ensure the stability of the structure, not to be disjointed in use, and the wear of the magnetic absorption surface are all problems to be considered.

And the most important thing is that there's no problem with how to design the game. There's no need to consider whether science and technology can do it or whether the structure is really reasonable. Even if it's designed as a magnetic suspension joint, others will only say that technology is awesome.

But in reality, Chen Xin has to consider more, especially when he is aiming at saving cost to consider the design of structure, it is even more impossible to adopt too complex or too high cost structure.

So thinking about it, Chen Xin ruled out the connection of spherical joints.

However, it is still very difficult to solve the problem.

Fortunately, the mechanical structure of several games still gave Chen Xin a lot of reference. After careful thinking and comparison, Chen Xin decided to add a new joint on the basis of the original two shoulder joints, so as to increase flexibility.

The back shaft joint remains unchanged, and the original pendulum connection of the shoulder part is changed into a disc-shaped connection structure, which integrates the assist structure and the joint. The rotation angle of 0 ° to 270 ° is achieved by the motor driving the internal structure of the disc.

At the same time, at the lower part of the disc structure, there is a rotation joint whose rotation axis is perpendicular to the rotation axis of the disc, so as to ensure the flexible rotation of the arm.

After this adjustment, we finally solved the problem of the flexibility of the exoskeleton upper limb, so that the arm can get help while ensuring enough flexibility.

After solving this problem, the biggest problem for the whole set of exoskeleton protective clothing has been solved. As for the problem of high-performance batteries and the helmet that Chen Xin's father reflected is too big, this is a good solution.

According to his father's suggestion, Chen Xin reduced the original huge helmet from the original helmet like a spacesuit to a motorcycle like helmet that completely fits the head with only partially transparent eyes and connected with a breathing mask. Finally, Chen Xin made a set of test samples of exoskeleton protective clothing.

This time, he put on the experimental exoskeleton protective suit himself. Without other people's help, Chen Xin spent about five minutes to put on the whole exoskeleton protective suit.

Although it's a bit cumbersome, Chen Xin thinks that it's an acceptable level. After all, it's just a civilian type, and there's no need to consider the need for quick wear and take off. As long as you can wear and take off by yourself, and it won't take too much time and effort.

After wearing the exoskeleton protective suit, Chen Xin turned on the power and walked into the elevator, intending to go outside to test the effect of the exoskeleton protective suit.

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