Try to analyze the working principle of reverse brake
Reversed brake appeared when the potential load moment exceeded the electromagnetic moment. For example, when a crane was lowering a heavy object, this working state was often used to control the descending speed. The principle was that under normal circumstances, when the weight rose at the rated speed, the relevant contactors were connected, and the external resistance in the rotor-circuit was cut off; when the weight fell, the relevant contactors were cut off, and all the resistance was connected to the rotor-circuit, which caused the critical point of the mechanical characteristics to move down significantly. At this time, the power supply was still connected, but the motor was reversed, thus forming a reverse brake. In this braking state, the mechanical power input into the motor shaft was converted into electric power, which was consumed by the resistance of the motor circuit together with the electromagnetic power transmitted from the motor. Read more exciting novels for free
Working Principle of Reverse Connection Control Circuit of Three-phase Induction Machine
The working principle of the three-phase induction motor reverse connection control circuit is as follows: 1. Reverse braking was completed with the help of the speed relay SD. There was a heavy object in the speed relay mechanically connected to the motor shaft. 2. After pressing the start button, the motor of the SSB1 rotated to a certain speed. Due to the inertia, the weight pressed the speed relay micro-switch to send a signal, and the SD contact was connected. 3. When the stop button SSB0 is pressed, the KM1 loses power, and the motor enters the free parking state instantly after being disconnected from the power supply; after the normally closed contact of the KM1 recovers, the KM2 is energized, and the motor enters the braking state after being connected with the reverse power supply; when the speed of the motor drops and is lower than the speed at which the speed relay contacts are pressed together, the speed relay micro switch is disconnected, and the motor enters the free parking state again until it completely stops. 4. For KM1 and KM2, AC contactors with mechanical interlocks shall be selected, and their normally closed contacts shall be set with electrical interlocks to ensure safety. 5. Circuit breakers QF1 and QF2 are used for short-circuit protection, and thermal relay KH is used for long-term overload protection of the motor. 6. The resistance R was used to adjust the brake strength. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The working principle of oil extraction
The working principle of oil extraction included geological exploration, drilling, oil extraction, and transportation. The location and nature of the oil reservoir can be determined through geological survey and geological survey. Well drilling was the process of passing a drill bit through the earth and into the oil reservoir. Oil extraction was the process of extracting oil from a reservoir. Transportation was the process of transporting the extracted oil to its destination. The specific mining methods included natural pressure mining, artificial pumping, water flooding, and gas flooding.
The working principle of 2D and 3D
The working principles of the 2D and 3D are different. You can refer to the following explanation: Two-dimensional refers to the fictional two-dimensional world that usually appears in anime, comics, games, and other media. In the 2D world, characters, scenes, and things were flat, and the colors and shapes were simple geometric shapes. The working principle of 2D was based on the projection principle by projecting an image onto a two-dimensional plane to create a virtual world. The three-dimensional world refers to the real world we live in. In the three-dimensional world, characters, scenes, and things were all three-dimensional, and the colors and shapes were all complicated. The working principle of the three-dimensional world was based on the principle of perspective. By observing an object from different angles and distances, one could obtain its shape, size, position, and other characteristics. Therefore, the difference between the working principle of 2D and 3D was that they were based on different principles and presentation methods.
The working principle of the cvl transmission
The CVS transmission was mainly composed of two variable diameter rollers (shaped like a pair of cones) and a steel belt or chain. One of the rollers was connected to the engine (power input) and the other was connected to the drive shaft (power output). During operation, the transmission ratio was changed by changing the diameter of the rollers (that is, the contact diameter between the cone and the steel belt or chain). For example, when driving at a low speed, the diameter of the input end of the wheel was smaller and the speed was higher, while the diameter of the output end of the wheel was larger and the speed was lower. As the speed of the car increased, the diameter of the two wheels changed, causing the speed of the output end of the wheel to increase. According to the different power transmitting devices, it could be divided into steel belt CVs and chain CVs. When the steel-belt CVS works, the driving cone wheel presses the side of the steel belt formed by the overlapping of the metal sheets and the metal rings to form static friction force, and the hardness between the push sheet materials is used to form thrust force, so that the steel belt drives the driven cone wheel to rotate to transmit power. When the driving wheel is clamped to the middle by the oil pressure device, the steel belt moves upward along the side wall, the circumference of the driving wheel increases, and the circumference of the driven wheel decreases, thus realizing the amplification of the engine's torque-force. The chain of the chain-type CVS was composed of a ring-shaped steel sheet and a pull piece. When it worked, the chain did not directly contact the cone wheel, but the middle rocking arm pin was pressed to achieve the transmission of the moment. The novel "Watching the Moon on Fish Island" is equally exciting. Everyone is welcome to click and read it!
The working principle of Bluetooth is easy to understand
Bluetooth works by connecting devices through radio waves, allowing them to communicate over short distances. The Bluetooth device includes a Bluetooth module, a Bluetooth radio, and software. When two Bluetooth devices wanted to communicate with each other, they needed to pair up. Communication between Bluetooth devices was carried out in a short-range temporary network that could accommodate two to eight devices. After the network environment was successfully created, one device would be the master device, and the other devices would be the slave devices. Different types of Bluetooth technology had different versions of the core specifications. Bluetooth uses the 2.4-gigasecond radio frequency band for communication, which is divided into multiple small channels to avoid interference. Bluetooth's global usefulness and low power requirements made it a popular standard for connecting all kinds of devices, from consumer electronics to business applications to Internet of Things devices.
Deep-Sea Submersible Working Principle
Different types of deep-sea submarines worked differently. For some simple diving simulation devices, such as a device that put a small glass bottle half filled with water into a big bottle, when the bottle was squeezed by hand, the water would enter the small bottle mouth and squeeze the air in the bottle, making the drainage volume smaller. When the gravity was greater than the buoyancy, the water would fall. When the bottle was released, the air volume would expand, and the buoyancy would rise when the gravity was greater than the gravity. The Dragon and other deep-sea manned submarines had ballasting iron. In the early stage, they were negative in buoyancy. After entering the sea, they began to sink. After all the work was completed, the submariners threw away the ballasting iron, became positive in buoyancy, and began to rise. This was because the deep-sea submarine was deep and the environmental pressure was high. The compressed air was not enough to force out the seawater in the air cabin, so the method of abandoning the ballasts was used to float up. Generally, the electromagnetic control was used to control the ballasting iron. If the deep-sea submarine lost power and the electromagnetic was ineffective, the ballasting iron would automatically separate from the submarine under the effect of gravity and make the submarine float. In terms of safety, Dragon's design not only included throwing away the ballasting iron, but also heavy objects such as the battery box and the sample basket. If it was entangled by seaweed, it could also abandon the robotic arm, and the alarm system could also send a float to the surface to seek rescue from the mother ship. In addition, the Endeavor used a cable-less and unpowered floating and diving technology. Generally speaking, the diving method of a deep-sea submarine was the same as that of a submarine. They both injected seawater into the air cabin, but the method of surfacing was different. Moreover, the deep-sea submarine was not completely autonomous. It had to rely on the mother ship to replenish energy and air. The novel " Flood Dragon " is equally exciting. Everyone is welcome to click and read it!
What is the simple working principle of the camera?
The basic principle of the camera was to convert optical image signals into electrical signals for storage or transmission. When shooting an object, the light reflected from the object is collected by the camera lens and focused on the light receiving surface of the camera device. The light is converted into electrical energy by the camera device to obtain a "video signal". Because the optical signal was very weak, it needed to be amplified by the pre-amplifier circuit, and then processed and adjusted by various circuits. The final standard signal could be sent to a recording medium such as a video recorder, or transmitted through a transmission system or sent to a monitor for display. In addition, the working principle of some modern cameras involved more links. For example, the Sensor image sensor in the camera first sensed the external light and converted it into an image, then transmitted the data to the SoC (System on a Chip) for unified pre-processing, such as drying, enhancing contrast, adjusting color, etc. Then it was transferred to the AI module, using pre-trained algorithms to analyze the image and classify the output results. There were also some special-purpose cameras. For example, the intelligent drip recognition camera in the factory determined whether a liquid drip event occurred through a predetermined drip detection algorithm and pattern recognition technology. The automatic water level monitoring camera continuously captured water surface images and used image processing algorithms to extract water level information. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The working principle of the ice skating car
The working principle of the ice pouring vehicle was as follows: the scraper on the ice plow of the ice pouring vehicle scraped the ice surface to ensure the smoothness of the ice surface, and then the ice chips scraped by the scraper and the ice skates were collected through the horizontal and vertical transmission system. Then, the ice washing system was used to clean the stains on the ice surface, and the sewage was pumped into the ice washing tank through the water pump. After the ice repair operation was completed, the ice chips collected in the snow tank were dumped to the designated place. In addition, there was a knife under the ice pouring cart, which could cut the potholes on the ice surface. After that, the ice surface could be melted by pouring warm water at 45 ° C. During this process, the hot water would cool down, making the ice surface very smooth and flat. If ice water was used, the new ice surface would be more brittle than the ice surface poured by hot water, which was not conducive to competition. Moreover, the entire surface of the ice surface formed by pouring warm water on the ice was naturally formed, and the relative molecules were unified and stable. While watching the Olympics, you can also read the wonderful novels related to the Olympics!
Working principle of retro reflective sensor
The retro reflective sensor is composed of a light transmitter and a light receiver. The transmitter emitted a beam of light, which was reflected and received by the receiver. When an object was detected, the object would block the light, causing the light received by the receiver to weaken or disappear. Then, according to the intensity of the light received by the receiver, it was determined whether the object was detected. This type of sensor is suitable for detecting opaque objects and is not easily disturbed by environmental light. When it was used, the light transmitter and light receiver needed to be installed on the same side, and the object was placed on the other side of the sensor. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the principle of the two axes rotating in reverse?
The principle of the two axes rotating in opposite directions was as follows: There might be a double-layer design in the structural design of the shaft. The upper layer and the lower layer had different structures. Through the engagement of the inner and outer gears with the teeth on the shaft, when one gear rotated clockwise, the other gear would rotate counterclockwise, thus achieving the reverse rotation effect. It could also be through the complicated gear structure inside the input shaft. The input shaft would drive the big gear, and the big gear would drive the two small gears. Finally, they would work together to drive the outer gear to rotate, thus achieving the reverse rotation of the blades. They could also use the action of the toothed disc to rotate the structure covered by the inner layer. This way, they could independently control the two oars or achieve reverse movement through the interaction of the three gears. Through these precise gear systems and power transmission mechanisms, the two axes or propellers could rotate in opposite directions to achieve efficient and stable operation. In addition, in the case of the coax counter-rotating propellers, the two counter-rotating propellers could offset each other's torques. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>