Fu Shuo went to Lanqi Company for exchange. This office building has twenty floors. When he arrived on the tenth floor, there was a conference room with several company personnel discussing around the desk. The staff of Landado Company and Landaki Company often discuss the development of power equipment together. After talking for a day, Fu Shuo also ordered a box lunch. After eating, he called Yonghan and waited for a ride back.
At this time, a department manager ran up in a panic and said, "Please stay here. I found that there are traces of copying of a power system wiring diagram. Someone is leaking or stealing company secrets."
"What else is there? Why do others use your wiring diagram?" Fu Shuo said.
"We can't leave now, let's wait." Someone else said.
The computer to which the data is being copied is on level 2. There are people on floors 5, 10, and 11. Hao Zha on the 5th floor was working overtime and turned on the air conditioner. Hao Zha is now scraping together money to buy a house.
Xiong Shu was watching TV in the conference room on the 10th floor. Xiong Shu has always been more playful. Fu Shuo was waiting outside.
The 11th floor Chiang sturgeon is boiling water. Jiang Jie is ready to change jobs.
There are elevators and cameras on one side of the building, and there are no cameras on the other side, just stairs.
The manager of the technical department, Du Shuo, explained the situation of these layers of personnel. "There are no cameras on this side of the building, so we can't judge. Fortunately, we discovered them in time. They are all in the building now and have not gone out. Now we are checking them one by one."
Jiang Sturgeon is boiling water, and it is entirely possible to copy data while boiling water. Jiang Zhen said: "This kettle cannot automatically power off. I turned it off manually after ten minutes. I couldn't turn on the kettle switch within ten minutes. I went down to copy and ran up to turn it off again."
Xiong Shu said embarrassedly that he was watching the conference room TV. Anyway, the TV was not used for meetings at that time. The TV is always on. Outside were Fu Shuo and others.
Hao Zha is in the office, with the computer and air conditioner turned on.
Fu Shuo said: "Does this office building have an electric energy recorder? Look at the data and waveforms recorded by the electric energy meter."
The manager said: "Yes. What's the use of this record?"
Fu Shuo said: "The switching and operating current values and changing trends of each electrical appliance are different. You can check the status of the electrical appliance."
This method is also called non-intrusive load detection. When people or machines monitor load operation, they use information such as power changes caused by changes in switching states of different loads to classify them. The non-intrusive load detection system can judge based on this information and estimate the type, operation status and related parameters of each load. Based on the results of system analysis, a more realistic system model can be established to facilitate load monitoring, power management, etc.
High-power equipment, the current is relatively large. Such as air conditioning. Low power equipment, the current is relatively small. Such as electric lights. Some electrical equipment have capacitive loads, some have inductive loads, and some have resistive loads.
Compared with the capacitive load and the power supply, the load current leads the load voltage by a phase difference. At this time, the load is a capacitive load. Generally, what is given in the description of inductive loads is the size of the active power. The specific perceptual part of different products, that is, the size of the reactive power, can be calculated by the power factor given by it. High-power electrical products made using the principle of electromagnetic induction, such as motors, compressors, relays, fluorescent lamps, etc., require a starting current much larger than the current required to maintain normal operation when starting. Inductors resist changes in current. When the current flowing through the inductor changes, an induced electromotive force is generated at both ends, and its polarity hinders the change of the current. When the current increases, it will hinder the increase of the current, and when the current decreases, it will in turn hinder the decrease of the current. This prevents the current flowing through the inductor from changing suddenly, which is a characteristic of inductive loads. The load is resistive when there is no phase difference between the load current and the load voltage compared to the power supply.
After observing the current recorder. Jiang Sturgeon's hot water kettle was indeed turned off after being turned on for ten minutes. The kettle cannot power off automatically. Xiong Shu had the TV on in the conference room. Fu Shuo was outside the conference room at that time.
Hao Zha turned on the air conditioner and opened the door, then turned off the air conditioner and closed the door again.
"I didn't close the door immediately after opening it. I waited for a long time before closing it. Isn't this suspicious? You should have gone down during this time." Fu Shuo said.
"After I went down, I thought the air conditioner was not turned off and I turned it off again. What's the problem?" Hao Zha said.
"The power consumption of the electric door is slightly longer after opening and closing, and the power consumption time is shorter when it is only opened. From the records, it can be seen that you only opened the door. The electric door requires a button setting to open and then not close. You deliberately set it to open. Until you come back."
The manager went to take a look, and sure enough there was a set record on the door.
"How about I check your hard drive?" the manager said.
"Okay." Hao Zha admitted. He stole wiring diagrams in order to sell them.
Yonghan and Fu Shuo were on their way back. Fu Shuo said, "When you change the TV channel, can the current change be detected?" "No, it's too small."
"Yes."
"Good performance this time. Arashizaki's manager will invite you next time."
"Xiao showed his skills. I learned from Master Yan. That person copied information, and only copied the wiring diagram near the power station. Isn't it strange?"
"Maybe this neighborhood is important, or someone needs this."
"Here's the problem, someone needs it, who would need it, and what do you need a wiring diagram for?"
"Want to learn how to build power plants in other places?"
"There are wiring diagrams everywhere on the Internet, so you don't need to ask him to steal the information, right?"
"Could it be that this wiring diagram has a special purpose?"
At this time, Manager Lanzaki called and said that the boss would invite them to sit down tomorrow. Du Biqi found a restaurant and called the manager, Fu Shuo and Yonghan to eat.
Du said: "Heroes come from young people. They can solve crimes through electrical energy data. I toast you."
"I learned this from Master Yan."
Du said, "Oh, we used to be colleagues. Twenty years ago. Then we each had our own ambitions and went our separate ways. We all lived well. I'm just a businessman. His personality changed drastically twenty years ago and he didn't like to cooperate with workers. , looked down upon the company, and only wanted to build an energy gathering field by himself. The company would definitely disagree, so he left unhappy."
"Now that the dungeon is built, it is an opportunity for the electrical engineer. Maybe he will come back. But we have no contact. After all, people are divided into groups."
Yonghan remembered what Yan Zhuoshou said: "More than 20 years ago, I had not gone to Landian Company and was working in another company. We received the task and went to the back mountain to find the energy gathering field and wanted to take it back for study. But where By that time, some parts may have been removed, the energy gathering field no longer works, and the energy flow inside gradually dissipates."
Yonghan knew that energy gathering fields also affected people, but it was hard to ask.
