Diagram of the reverse flight principle of the drone's wings
For a multi-roter drone, taking a quadrocopter as an example, the two adjacent propellers rotated in opposite directions. For example, the propellers M1 and M3 rotated counterclockwise, and the propellers M2 and M4 rotated clockwise. This was based on the principle that when flying, the counter-clockwise reaction force (reaction moment) generated by M2 and M4 and the clockwise reaction force (reaction moment) generated by M1 and M3 offset each other, thus maintaining the stability of the aircraft. When the two sets of wings rotated in opposite directions, the total power of the drone was zero. Angular power was dependent on the speed of the rotating blades. The value of angular power was similar to the value of linear power. It could be calculated by multiplying the angular velocity by the moment of inertia. The diagram was usually presented as follows: the triangular red arrow indicated the direction of the aircraft's nose, the direction of rotation of the propellers M1 and M3 was counterclockwise, and the direction of rotation of the propellers M2 and M4 was clockwise. When describing the principle of the drone's forward and backward flight and in-place rotation, it also involved the layout of the direction of rotation of the helicopter. For example, when rotating on the spot, it could be achieved by increasing the speed of the two clockwise rotating motor M2 and M4, and reducing the speed of the two counterclockwise rotating motor M1 and M3, using the reverse moment. During vertical take-off and landing, the four rotators accelerated the rotation at the same time to increase the lift of the aircraft, while reducing the speed of the aircraft. During flight, the speed of multiple propellers could be controlled to achieve front, back, left, right or rotating flight. Read more exciting novels for free
The principle diagram of the reflective sensor
The principle diagram of the reflective sensor isn't that complicated. Let me explain it to you. Generally speaking, it had a light-emitting component and a receiving component. The light-emitting component would emit light, and the light would shoot towards the target object. When the light touched the target object, it would be reflected back and then captured by the receiver. If the target object was close or the surface was reflective, the reflected light would be stronger; if the target object was far away or the surface absorbed light, the reflected light would be weaker. When the receiving component receives different intensity of reflected light, it will produce corresponding electrical signal changes. Through the analysis and processing of this electrical signal, it can determine some characteristics of the target object, such as distance, existence, and so on. This was the general situation of the reflective photo sensor. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The Basic Principle of Fishbone Diagram
The basic principle of the fishbone diagram was to point at a problem (the fish head), list the major cause of the problem (the main body of the fish bone), and then continue to dig deeper from the major cause to list the medium cause (the fishbone) of each major cause. Then, dig out the small cause (the small fishbone), and analyze it layer by layer until you find a solution to the problem or the steps to take.
Working principle of agricultural plant protection drone
A simple explanation of the flight principle of an airplane
Airplane flight was mainly based on the following principles: 1. ** Creating lift ** - For an ordinary airplane, the shape of the wings was designed to cause the air to flow at different speeds across the upper and lower surfaces of the wings. According to the Bernoullian principle, the greater the flow rate of the fluid, the lower the pressure. The upper surface of the wing was usually curved, so the air flow was fast and the pressure was small. The lower surface was flat, so the air flow was slow and the pressure was strong, thus creating an upward pressure difference, which was the lift force. In addition, the lift was also related to factors such as the angle of attack (the angle between the wing chord and the relative airflow speed). - For helicopters, the large propellers stirred the air to generate lift when they rotated. When the lift was greater than the helicopter's own weight, the helicopter could take off, and the height could be adjusted by changing the speed of the propeller in flight. 2. ** Obtained Thrust Force ** - The aircraft could obtain forward thrust through the engine. A common type of engine, such as a piston-type engine (such as the early star engine), produced forward traction by driving the propeller to rotate. The turbine jet engine was a high-speed air compression engine. The air was compressed by the high-speed operation of the air intake. The combustion chamber sprayed oil and burned it. The gas rushed back to the turbine, which drove the air compression engine. The gas flow was ejected from the spout to generate thrust. Turbofan engines (turbine-fan engines) had two internal and external bypass passages. The ratio of the air flow rate of the external bypass passage to the internal bypass passage was the bypass ratio. The larger the bypass ratio, the more fuel efficient it was. It was widely used in aircraft flying at subsonic speeds such as passenger planes. Its main thrust could come from the air ejected backward at high speed from the external bypass passage. The turbine prop-jet engine was similar to the turbine jet engine, which was connected to a decelerator and drove an external propeller. It was mostly used in small or low-speed subsonic aircraft, but there were exceptions. There was also a propfan engine. There was no decelerator, and the propeller had a high speed. The fuel efficiency was further improved, but it was noisy. Turboshaft engines transmit power through a shaft and are used in helicopters. 3. ** Controlling the flying posture ** - The aircraft had three axes of motion: pitch, roll, and yawing. The roll was controlled by the ailerons, the pitch was controlled by the elevators, and the yawing was controlled by the rudders. - If the helicopter only had the main propeller rotating, the body would rotate according to the conservation of momentum. Therefore, the small propeller on the side of the tail of the helicopter was used to prevent the body from rotating, so that the helicopter could turn left, turn right, or maintain a stable course. 4. ** Maintain center of gravity and balance **: The position of the aircraft's center of gravity needs to be reasonably distributed to ensure balance and stability during flight. Different types of aircraft structures and arrangements were designed with the center of gravity and balance in mind. The novel "Hundred Years of Spaceship" is equally exciting. Everyone is welcome to click and read it!
The principle diagram of the goose fish copper lamp
The Yanyu copper lamp was mainly composed of the head and neck of the goose, the body of the goose, the lamp plate, and the lamp cover. The principle was as follows: the goose neck and the goose body were connected by the mother-son mouth, and the fish body, the goose neck, and the body cavity were hollow and connected. When the lights were lit inside the fish, the smoke and exhaust gas would rise to the goose's neck and then be guided into the goose's body using the siphoning principle. Before lighting the copper lamp, the ancients would put some water into the belly of the wild goose (the body cavity of the lamp). After the smoke and exhaust gas produced after the lamp was lit entered the body of the wild goose, it would be diluted by the water to reduce or eliminate the pollution of indoor air, thus achieving environmental protection. One side of the lamp plate was attached with a lamp handle to control the lamp plate to rotate back and forth. There were two straight wall rings in the circular lamp plate. One straight wall ring was fixedly connected with the lamp plate in the form of a mother and son mouth, and the other straight wall ring was connected with two curved plates to form a lampshade that could be opened and closed left and right. It could not only block the wind, but also adjust the illumination of the light. The novel "Gilded Palm" is equally exciting. Everyone is welcome to click and read it!
How to adjust the reverse rotation of the drone propeller?
If the motor's connection was reversed and caused the propeller to rotate, it would be fine to replace the connection. At the same time, they had to check if the propeller had been removed. Each propeller had a fixed position. Because the shape of the propeller was different, there was a reverse direction. They could change the position of the propeller and try again. They also had to check if the blades were installed in the opposite direction. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to draw the forward and reverse ladder diagram and circuit diagram
The following is a basic method to draw a positive and negative ladder diagram and circuit diagram: ** 1. Confirm control requirements and I/O allocation ** 1. ** Clear control requirements ** - Usually, the forward and reverse control required the motor to rotate forward, reverse, and stop through buttons, and it had to be interlocked with forward and reverse (to prevent short circuits caused by forward and reverse rotation at the same time). It might also require thermal relay for overload protection and other functions. 2. **I/O allocation confirmed ** - ** Inputs **: For example, the start button for forward rotation, the start button for reverse rotation, the stop button, and the overload protection signal of the thermal relay are all used as input signals. These input signals should be distributed to the corresponding input terminal of the PC. For example, in the case of the Mitsui PC, it may be X000, X001, etc., and in the case of the siemen PC, it may be I0.0, I0.1, etc. - ** Outputs **: Forward Contactor Coils and Reverse Contactor Coils are used as the output devices. They should be connected to the corresponding output terminal of the PC, such as Y000 and Y001 of the Mitsubishi-based PC, Q0.0 and Q0.1 of the SIEMEN-based PC, etc. ** 2. Draw the circuit diagram (Take the three-phase induction motor as an example)** 1. ** Main circuit part ** - The three-phase power supply was connected to the fuse (for short-circuit protection) and then connected to the main contact of the contactors. For forward rotation, when the main contact of the forward rotation contactors (KM1) is closed, the three-phase power supply is connected to the motor according to the normal phase sequence, and the motor is rotated forward. For reversal, when the main contact of the reversal contactors (KM2) is closed, the phase sequence of two phases of the three-phase power supply is reversed and then connected to the motor, and the motor is reversed. At the same time, the thermal relay (FT) should be connected to the circuit to detect the current of the motor and automatically cut off the circuit when overloaded. 2. ** Control Circuit ** - ** Forward control circuit **: Lead out from one end of the power supply, first connect the stop button (normally closed), then connect the forward start button (normally open) and the auxiliary normally open contact (for self-locking) of the forward rotating contactors (KM1) in series, then connect the auxiliary normally closed contact (for interlocked) of the reversing contactors (KM2) in series, and finally connect to the coil of the forward rotating contactors (KM1). The other end of the coil returns to the other end of the power supply. - ** Reverse control circuit **: It is also led out from one end of the power supply. First, connect the stop button (normally closed), then connect the reverse start button (normally open) and the auxiliary normally open contact of the reversing contactors (KM2) in series (for self-locking), then connect the auxiliary normally closed contact of the forward rotating contactors (KM1) in series (for interlocked), and finally connect to the coil of the reversing contactors (KM2). The other end of the coil returns to the other end of the power supply. - ** Overload protection part **: The normally closed contact of the thermal relay (FT) is connected in series to the common part of the control circuit (i.e. behind the stop button). When the motor is overloaded, the thermal relay will act, and the normally closed contact will be disconnected, cutting off the entire control circuit. ** 3. Draw the ladder diagram (Take the SIEMens's PL as an example)** 1. ** Forward Rotation Control Logics ** - I0.0 is used as the input signal of the forward start button, I0.1 is used as the input signal of the stop button, I0.2 is used as the input signal of the reverse start button (all are normally open contact input), Q0.0 is used as the output signal of the forward contact coil, and Q0.1 is used as the output signal of the reverse contact coil. - When I0.0 is pressed (the normally open contact is closed) and I0.1 is not pressed (the normally closed contact is closed) and Q0.1 is not energized (the normally closed contact is closed), Q0.0 is energized and self-locked (the normally open contact of Q0.0 is closed to maintain its energized state). - In the ladder diagram, it is represented as: the normally closed contacts of I0.0 and I0.1, the normally closed contact of Q0.1 are connected in series to the coil of Q0.0, and the normally open contact of Q0.0 is connected in parallel with I0.0 to achieve self-locking. 2. ** Reverse control logic ** - When I0.2 is pressed (the normally open contact is closed) and I0.1 is not pressed (the normally closed contact is closed) and Q0.0 is not energized (the normally closed contact is closed), Q0.1 is energized and self-locking. - In the ladder diagram, it is represented as: the normally closed contacts of I0.2 and I0.1, the normally closed contact of Q0.0 are connected in series to the coil of Q0.1, and the normally open contact of Q0.1 is connected in parallel with I0.2 to achieve self-locking. The specific instructions, component representation, and programming rules of different brands of PDLCs (e.g., Samsung, SIEMENS, etc.) may differ, but the basic control logic and design ideas are similar. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Fish Tank Reverse Lifting Diagram
You only mentioned the " fish tank reverse water lifting principle diagram ", but you didn't give me any detailed information about the principle diagram, such as a description of the principle, introduction of the components, and so on. This way, I can't integrate and polish it. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Diode Reverse Circuit Diagram Test
Working principle diagram of the three-way catalyst reactor
When the engine exhausted through the exhaust pipe, the three toxic gases of CO, HQ, and NOX passed through the purifying agent in the three-way catalyst reactor, which would enhance the activity of these three gases and promote chemical reactions such as oxidization and reduction. Among them, the carbon dioxide is oxided into colorless and non-toxic carbon dioxide (CO2) gas at high temperature; the carbon dioxide is oxided into water (H2O) and CO2 at high temperature; and the nitrogen dioxide is reduced into nitrogen (N2) and oxygen (O2), thereby transforming the three harmful gases into harmless gases to achieve the purpose of purifying waste gas. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>