Regarding the sudden increase in vegetable production, Chen Xin is not too anxious to deal with it. As long as the vegetables are not harvested, they will not go bad if they are planted on the hydroponics tray, but the taste will become stale.
However, this matter cannot be left alone forever. While Chen Xin is thinking about how to improve the exoskeleton, he is also thinking about how to deal with the surge in vegetable output.
Although there are many more people in the shelter than before, and the consumption has also increased, but compared with the surge in production, the increased consumption is really not worth mentioning.
After all, it is almost two to three thousand kilograms of vegetables in total. According to the previous agreement between Chen Xin and the SWAT team, so many vegetables need to be traded to them for a quarter. About one-tenth of the share for the eight people in the shelter is reserved. Chickens and fish can consume part of it, but more than half is still left. There are at least 1,500 kilograms of vegetables that need to be considered how to deal with them.
If it were more than 1,500 kilograms of vegetables before the disaster, they might be sold out in a day or two after being dragged to the vegetable market. It would not be a big deal at all.
After the disaster, although this is still a very scarce and hard-to-find material, if Chen Xin is willing to sell more, people will want to buy it, but Chen Xin does not want to exchange these vegetables for a bunch of things that he cannot use.
But he didn't want to go back. Chen Xin still had to find a way to get rid of these more than a thousand kilograms of vegetables, especially the sweet potato seedlings he brought back from his hometown. He needed to free up a layer of planting trays in the greenhouse for planting. Chen Xin couldn't Let these vegetables still occupy the planting tray.
And more importantly, after the planting area in his greenhouse expanded and the output doubled, he had to find a way for the extra output every month.
The transaction with the SWAT team can expand the transaction volume a bit, but considering what can be exchanged, the potential of this part of the transaction share is limited. The most Chen Xin can do is exchange some more shelter rations and living supplies every month.
He can get this part of the things from other people, especially since Chen Xin is cooperating with the country. Other things may be a little difficult, but food and daily necessities can be obtained even if Chen Xin asks for them. Arrived.
So after thinking about it carefully and carefully considering the pros and cons, Chen Xin decided that in addition to expanding the fixed transaction with the SWAT team, Li Yulong would sell the rest in his trading market.
On the one hand, this is a support for Li Yulong's trading market. Adding fresh vegetables as sellable goods can help this trading market develop better.
On the other hand, this can also be regarded as an investment. Since Chen Xin doesn't know what to exchange for these vegetables, it is better to use them as an investment to help Li Yulong, so that he can get more returns.
And this is also to find a way to consume the increased vegetable production every month, so as not to have to find a market for the increased vegetable production in the future.
After learning about Chen Xin's decision, Mo Qingyan did not express any opinion on the matter. She only confirmed to him the time for harvesting the crops in the greenhouse and said nothing more.
Facing Mo Qingyan's indifference, Chen Xin felt helpless for a while, but with his parents around, Chen Xin really couldn't deal with this kind of emotional problem. In addition, he had always treated Mo Qingyan as a friend and did not care about her. The idea of developing a relationship beyond friendship can only be put aside for the time being and treated coldly.
After dealing with these matters, Chen Xin continued to devote his energy to improving the mechanical structure of the exoskeleton. After all, this was what he cared about most at the moment.
Regarding the problem of insufficient joint flexibility of the exoskeleton, Chen Xin first adjusted the movable range of each joint and increased the movable angle of each pendulum connection.
After adjustments, the flexibility has been improved to a certain extent. At least now Chen Xin can take off the helmet on his head while wearing the exoskeleton.
However, the range of motion of the shoulder joint is still insufficient. The arms can only be extended horizontally and cannot be extended backwards and upwards.
This is mainly due to the limitations 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-assisting points. While adjusting joint flexibility, Chen Xin must also consider the problem of the power-assisted mechanism.
It is relatively easy to adjust the elbow joint, because the angle of movement of the elbow itself is not too large, and it can be adjusted by adjusting the length of the hydraulic telescopic rod that assists.
But adjusting the shoulder joint is not that simple.
There are two movable joints in the shoulder joint. One of them is an axis perpendicular to the back, located at the position of the human body's scapula. The entire structure of the exoskeleton arm is connected to this axis, thereby interoperating with the exoskeleton. The main connection is also the main joint through which the arm can swing back and forth.
The way this joint moves is that the axis itself is fixed, and other structures connected to the axis rotate around this axis. This is limited by the structure itself, and the amplitude of the arm swinging back and forth is not too large in actual use. This axis only It can swing in a limited range of 0°~70°, and can reach 90° after adjustment. Although it is not too flexible in use, it is enough.
The rest is a shoulder joint, which is a typical pendulum connection, responsible for connecting the axis joint structure of the back and the main part of the arm. It is the most important movable joint in the upper limb of the entire exoskeleton, and also has the largest range of motion. A joint.
The cooperation of these two joints theoretically allows the arm to swing back and forth and up and down. However, due to structural problems, the pendulum range of the shoulder joint is only 0°~120°. This kind of swing range cannot even be used to salute the French military salute. I can give you a German military salute from World War II.
Improving other connection methods of this joint will only make the structure more complicated. Although the flexibility is indeed increased, the installation of the power-assisted mechanism becomes troublesome.
Chen Xin considered using universal joints, magnetic joints and air bearing spherical joints as connection methods, but after trying out the samples, the results were not satisfactory, which would not only make the structure of the exoskeleton more complex, but also make the exoskeleton more complex. It will interfere with the power-assist structure, and the flexibility that can actually be improved is really limited.
This made Chen Xin scratch his head.
Really unable to think of a way to improve it, Chen Xin, after feeling irritated, decided to throw away all the scrapped plans and decided to play a game to relax, and also wanted to find inspiration from science fiction games.
Turning on the game console, Chen Xin took the controller and played the game. "Halo" and "Mass Effect" were of little reference value. It was powered armor. The structure that covered the whole body was completely different from the exoskeleton structure that was just like two iron rods.
It was the exoskeleton in "Call of Duty 11" that impressed Chen Xin, but after careful observation, he could only partially learn from it.
The back of the exoskeleton that appeared in "Call of Duty 11" is fixed, but the shoulders directly use ball joints that are the same as the human body structure, and the two ball joints are connected to provide sufficient flexibility for the shoulders.
This structure is of course possible, but the friction surface of the ball joint is too large, and to ensure sufficient flexibility, a fixed structure cannot be used. It can only be wrapped with flexible materials like human joints or simply made into magnetic attraction.
Of course, rubber is the first choice for flexible materials, but current rubber can only be synthesized industrially, and it can easily become brittle and lose its original effect in a low temperature environment of tens of degrees below zero. As for magnetic attraction, how to ensure the stability of the structure will not Disconnection during use and wear of the magnetic surface are all issues that need to be considered.
And the most important thing is that there is no problem with the design in the game. There is no need to consider whether the technology can do it or whether the structure is really reasonable. Even if it is designed as a magnetic levitation joint, others will only say that the technology is awesome.
But in reality, Chen Xin has to consider more, especially since he considers the design structure based on the premise of saving costs, so it is even more impossible to adopt a structure that is too complex or too costly.
So after much thought, Chen Xin ruled out the ball joint connection method.
However, it is easy to eliminate a solution, but it is still difficult to solve the problem.
Fortunately, the mechanical structures in several games gave Chen Xin a lot of reference. After careful consideration and comparison, Chen Xin decided to add a new joint to the original two shoulder joints. This increases flexibility.
The shaft connection joints on the back remain unchanged, and the original pendulum connection on the shoulder part has been changed to a disc-shaped connection structure, integrating the power-assist structure and the joints, and achieving 0°~270 by rotating the internal structure of the disc driven by the motor. ° rotation angle.
At the same time, there is a rotating joint at the bottom of the disc structure with a rotating axis and a rotating axis of the disc perpendicular to each other, thereby ensuring that the arm can rotate flexibly.
After these adjustments, the flexibility problem of the exoskeleton's upper limbs was finally solved, allowing the arms to gain assistance while ensuring sufficient flexibility.
Once this problem is solved, the biggest problem for the entire exoskeleton protective suit is solved. As for the high-performance battery and the problem of the helmet being too big as reported by Chen Xin's father, these can be easily solved.
Following the advice provided by his father, he shrunk the original huge helmet and changed it from a space suit-like hood into a motorcycle-like helmet that completely fit the head, with only the eyes partially transparent, and a breathing mask attached. Chen Xin finally made a new test sample of the exoskeleton protective suit according to the style.
This time he put on the experimental exoskeleton protective suit by himself. It took Chen Xin about five minutes to put on the entire exoskeleton protective suit without the help of others.
Although it is a bit cumbersome, Chen Xin feels that this is an acceptable level. After all, it is only for civilian use. There is no need to consider the need for quick put on and take off. As long as it can be put on and taken off by one person independently, it will not be too time-consuming and laborious.
After putting on the experimental exoskeleton protective suit, Chen Xin turned on the power and walked into the elevator, intending to go outside to test the effectiveness of the exoskeleton protective suit.
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