Qilianshan followed Liang Yuan into the side door of the device laboratory. The device laboratory, chip and gas engine laboratory also used a large area of ​​transparent dome. Sunlight sprinkled from the special glass in the laboratory roof, scattering green reflections on the light green dustproof ground in the workshop, giving people the illusion of stepping on the grass.

Liang Yuan took out another card from his coat pocket and put it in a card slot next to the door. With a low "buzzing sound", several rows of high-pressure lights hanging on the load-bearing structure of the roof lit up, and the workshop with good lighting suddenly became very vivid.

Qilianshan looked at the card inserted in the card slot and asked curiously: "Did you use this when you opened the door just now?"

Liang Yuan reached out and took out the card that opened the door from his coat pocket and handed it to Qilianshan, saying, "It's different. The one that opened the door was light blue, and the one that supplied the power was light red."

Qilianshan took the light blue card and rolled in his hand several times. Compared with the light red card inserted into the slot on the wall, Qilianshan discovered that the thickness of the light blue card can be about four or five millimeters, which is much thicker than the light red card.

"Xiaoyuan, the thickness of these two cards is different," Qilianshan asked.

"Haha, did Lao Qi find that these two cards are used differently?" Liang Yuan said.

Qilianshan pondered for a moment before remembering that when Liang Yuan entered the door, the card and the induction device embedded at the door had no contact at all. He just shook the door lock and opened in response.

Qilianshan pointed to the light red card inserted in the card slot and said, "One does not need to contact the sensor. The other must contact the sensor."

"Lao Qi was still very careful when observing it." Liang Yuan said: "The light blue one is a new technology called radio frequency recognition created by the chip laboratory. The light red one is a popular IC card abroad."

The origin of radio frequency identification technology in the 1930s. With the use of aircraft, a new type of war tool, it became a problem to distinguish between enemies and us in the sky. The British Empire, the world's largest power, creatively attached equipment similar to electronic tags to the aircraft. When the electromagnetic waves in special frequency bands were emitted to scan, the tagged aircraft reflected back the corresponding signal, and those without tags did not have any signal feedback, which simply distinguished the enemies and us.

With the advancement of technology, the theory of radio frequency identification has gradually developed and improved, and equipment has become smaller and smaller. By the end of the 1980s, mainstream international manufacturers have been able to integrate the transmission and reception of radio frequency radio waves into small chips.

Nanhu Science and Technology Park did this in the beginning to display the locomotive signal on the nose and solve the problem of drivers and passengers accurately knowing the signals displayed by the signal under the harsh conditions of the observation.

After Liang Yuan intervened in cooperation with Shengjing Signal Factory and developed the ltcs system, the transponder on the rail became the core of the entire system. Therefore, the RF technology, as the core of the transponder, became the top priority. After Wang Xin took the Science and Technology Park to piece together, a R&D team of about 50 people used the ** separation device to simulate most of the functions of the RF chip and the receiving chip. Unfortunately, due to the low overall integration of the circuit, the light blue card in Liang Yuan's hand that contained the receiving chip exceeded the standard.

"Lao Qi, the light blue card is actually a signal response device. It can convert the electromagnetic waves emitted by the radio frequency transmitter into current, and after internal calculation, it becomes a set of special electromagnetic waves and is sent back to match it to the transmitter. If it matches correctly, the transponder will send a signal to control the door lock to open."

"Xiaoyuan, can this light blue card and the light red card on the wall be integrated together in the future?" Qilianshan asked.

"Recently, the chip laboratory is working hard to improve the integration of various components of the card and improve the anti-interference ability of the entire system. It is not the energy to integrate these two things together for the time being. Does Lao Qi have any new ideas?" Liang Yuan said with a smile.

"This thing is very similar to the magnetic card card I encountered when I was staying in a hotel in Hong Kong," Qilianshan said with a little regret: "At the first time I saw this thing, I thought of the Shangri-La Hotel being prepared, and used cards instead of keys. Guests can enter the room in a flash like you did just now. What a modern thing in China. The hotel level can be increased by at least half a level, and the card is directly removed when checking out, which is equivalent to the automatic power outage of the room. It will also save a lot of unnecessary expenses for hotel operations."

After hearing Qilianshan say that, Liang Yuan nodded secretly. It seems that Qilianshan has been working hard recently after knowing that he is responsible for the water park and hotel projects, otherwise he would not have seen the application value of this system so quickly.

"Lao Qi, you are much stronger than Lao Su. I asked him to build this system a while ago, but he was reluctant to do it," Liang Yuan said with a smile.

Compared with microcontrollers, the light blue card in Liang Yuan's hand is much simpler. Generally speaking, the IC card from the 1980s actually takes out the microcontroller's memory directly for application. For Su Liangyu, this thing is not difficult at all. It's just taking out the memory of the ht680 microcontroller and fitting it with peripheral circuits to work. Finally, changing the encryption algorithm. Although it is impossible to manufacture on a large scale due to conditions, it is still relatively easy to use laboratory equipment to prepare hundreds of them.

In Liang Yuan's opinion, the core chip of the IC card must not be left out. In a few years, the domestic use of this aspect will be calculated on a scale of one billion and two billion. The most difficult thing for scientific research is not to know where the results are used and whether they can be accepted by the market after large-scale promotion. In terms of the actual conversion rate of scientific research results, only one or two of the ten pieces can be converted into real money, and the rest are basically waste materials, and for Liang Yuan, there is no waste in scientific research.

The two of them laughed and came to a compartment made of colored steel in the corner of the wall. After Liang Yuan entered the house, he pointed to a beige cabinet in the corner and said to Qilianshan: "Lao Qi, you are also a construction worker, see how the cabinet in the corner is like."

Qilian Mountain looked along Liang Yuan's fingers, and there were several groups of rectangular beige cabinets standing in the corner of the wall. Due to the paint, it was impossible to tell what material it was. Three narrow small windows were installed near the upper edge of the cabinet. Two rows of circular indicator lights were neatly arranged under the small window, red, green, and lower.

Qilianshan walked to the front of one of the cabinets, looked through the small window, then reached out and opened the cabinet door. Two rows of milky white circuit breakers were neatly installed in the middle and lower part of the cabinet. The red, green and yellow wires penetrated out of the circuit breaker, and finally gathered into three thick flat wires and crossed the cabinet body and penetrated into the wall.

ps: The power outage continued today, and I hadn't arrived at night. I ran to the Internet cafe and found it. I have confirmed that the transformer in the community was broken...)
Chapter completed!