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- The difference between strong electricity and weak electricity
- The main difference between strong electricity and weak electricity is the voltage range: strong electricity is higher than 36 volts, and weak electricity is lower than 36 volts. Strong electricity is mainly used for power and lighting, while weak electricity is used for information transmission and control. Strong electricity has greater safety hazards, while weak electricity is relatively safe. Strong electricity uses multi-stranded copper core wires, and weak electricity uses single-strand or twisted-pair wires. During construction and installation Strong and weak current systems are wired separately. The frequency of strong current is usually 50 or 60 Hz. The frequency of weak current is diverse. The transmission distance of strong current is shorter and the transmission distance of weak current is longer.
- Common Problem 962 2024-04-25 17:24:16
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- What are the three formulas of the mean value theorem?
- The mean value theorem provides three equivalent formulas, describing the relationship between the average velocity between two points on the function graph and the instantaneous velocity of the function at a certain point: f(b) - f(a) = f'(c) * (b - a)f(c) = (f(a) + f(b)) / 2f'(c) = (f(b) - f(a)) / (b - a)
- Common Problem 1129 2024-04-25 17:21:14
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- How to use an oscilloscope
- An oscilloscope is used to measure the time domain waveform of electrical signals. Here's how to use it: Connect to the circuit and ground; set the vertical gain and horizontal time base; trigger and analyze the amplitude, frequency, phase, and shape of the waveform; take advantage of advanced features such as FFT analysis, signal generator, and logic analyzer.
- Common Problem 817 2024-04-25 17:18:14
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- Is the permanent magnet motor DC or AC?
- Permanent magnet motors can operate as either AC or DC motors: AC motor: AC drives a rotating magnetic field in the armature windings, which interacts with the magnetic field of the permanent magnets to produce torque. DC motor: DC electricity produces a constant magnetic field, which interacts with the magnetic field of the permanent magnet to produce torque.
- Common Problem 1037 2024-04-25 17:06:12
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- What types of lidar are there?
- Lidar is divided into five types: mechanical, semi-solid-state, solid-state, flash and frequency modulated continuous wave (FMCW). The scanning methods and principles have their own advantages and disadvantages and are suitable for different application scenarios.
- Common Problem 932 2024-04-25 17:03:14
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- What is the principle of lidar?
- LiDAR measures the distance between an object and a sensor by emitting and measuring the time difference between laser pulses. Its working principle includes: emitting laser pulse target reflection time measurement distance calculation
- Common Problem 578 2024-04-25 16:57:19
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- Does lidar emit radiation?
- Yes, lidar emits electromagnetic radiation (laser), but its radiation in the near-infrared band has low energy and short pulses, making it harmless to the human body. At present, lidar has been widely used in fields such as autonomous driving, robotics, and surveying and mapping, and has been proven safe and harmless to the human body after safety testing and certification.
- Common Problem 593 2024-04-25 16:54:13
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- The role of lidar
- LiDAR uses laser light to detect distance and image. Its main functions include: precise ranging and modeling, used in terrain mapping, architectural scanning and archaeological survey. 3D imaging, generating point clouds for virtual reality, object recognition and architectural analysis. Self-driving cars provide three-dimensional environmental maps and sense obstacles and road conditions. Industrial automation for robot navigation, product inspection and automated warehousing. Remote sensing and atmospheric observations, detecting clouds, measuring vegetation height and measuring wind speed.
- Common Problem 416 2024-04-25 16:51:15
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- What is the function of filter
- Filters are used to selectively allow specific frequency signals to pass while blocking other frequency signals, thereby achieving frequency selection, noise removal, signal enhancement, isolation and protection.
- Common Problem 951 2024-04-25 16:48:13
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- What is the switching power supply used for?
- A switching power supply is an electronic device used to convert alternating current into direct current. Its working principle is based on pulse width modulation technology, and its main functions include voltage conversion, current limiting, isolation and ripple suppression. Switching power supplies are widely used in a variety of electronic equipment, including computers, mobile phones, televisions, audio systems and industrial equipment.
- Common Problem 444 2024-04-25 16:45:22
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- The higher the dielectric constant, the better the electrical conductivity?
- Dielectric constant is inversely proportional to electrical conductivity. Materials with a high dielectric constant have difficulty conducting electricity, while materials with high conductivity have a low dielectric constant.
- Common Problem 1401 2024-04-25 16:42:12
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- What is the dielectric constant ε0 equal to?
- The value of the vacuum permittivity ε0 is 8.854187817 × 10^-12 farads/meter (F/m). It is a constant that appears in the relationship between the dielectric constant ε0 and the electric field E, D = ε0E, where D is the electric displacement.
- Common Problem 1537 2024-04-25 16:36:11
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- What is dielectric constant?
- The dielectric constant is a dimensionless physical quantity that measures the degree of polarization of a dielectric and is defined as the ratio of the vacuum capacitance to the capacitance in the presence of the dielectric. The larger the dielectric constant, the stronger the polarization ability of the dielectric, which can enhance the capacitance and weaken the electric field strength. It is critical in electrical engineering and electronics, affecting the performance of capacitors, insulators and electromagnetic devices.
- Common Problem 1079 2024-04-25 16:33:14
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- What virtual reality technology vr can do
- Virtual reality (VR) technology creates immersive experiences and has a wide range of applications: Entertainment: VR games, movies, and travel offer engaging immersion. Education: Interactive learning and career training create unique learning experiences. History and Culture: VR allows people to experience historical events and culture. Healthcare: Innovative solutions for surgical simulation, pain management and phobia treatment. Other applications: Interior design, retail, and military training also benefit from the virtual experiences VR offers.
- Common Problem 660 2024-04-25 16:30:32
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- What is the reason for poor heating effect of air conditioner and how to solve it
- Poor air conditioning heating performance may be caused by insufficient refrigerant, clogged air filter, frost on the outdoor unit, fan failure, sensor failure, or worn system components. Solutions include checking refrigerant, cleaning or replacing filters, defrosting, checking fans, replacing sensors, and performing repairs.
- Common Problem 859 2024-04-25 16:27:15
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