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The electrical measuring instrument in the pressure measuring instrument is usually called a pressure transducer (pressuretransducer). It is a sensor that converts the pressure signal into a voltage signal output. Usually the pressure sensor is generally composed of elastic sensing element and displacement sensing element. The function of the elastic sensing element is to make the measured pressure act on a certain area and convert it into displacement or strain, and then the displacement sensing element or strain gauge converts it into an electrical signal that has a certain relationship with the pressure. Sometimes the functions of these two elements are combined. 

With the development of electronic technology, especially large-scale integrated circuit and computer technology, frequency weighting, detector and filter circuit in sound level meter are all realized by digital signal processing technology instead of analog circuit. This not only makes the circuit simpler and wider dynamic range, but also greatly improves the function and stability, especially for real-time spectrum analysis. A sound level meter is an instrument that measures the sound pressure level and sound level according to a certain frequency weighting and time weighting. It is the most commonly used instrument in acoustic measurement, which can approximate the noise level of industrial noise, traffic noise, environmental noise and living noise according to the characteristics of human hearing. It can be applied to the measurement of environmental noise, mechanical and electrical product noise, traffic noise, architectural acoustics and electro-acoustics.

An air motor (pneumatic motor), or compressed air engine, is a type of motor which does mechanical work by expanding compressed air. Pneumatic motors generally convert the compressed air energy to mechanical work through either linear or rotary motion. With proper using and maintenance, you can be sure that your air motor will maintain a high level of performance for many years. And it is easy to maintain an air motor. Basically, there are two key elements to pay attention to: lubrication and filtration.

Pure sine wave inverters have strict requirements for function and parameters. It is more expensive and can be used in electronic circuits that require higher waveform parameters. The ordinary inverter is a hybrid waveform of a sine wave, square wave, clutter and other components, which can be used for general electrical appliances, and the price is low.

As the temperature drops, so does the humidity, especially indoors, where our heaters inconveniently deprive the air of moisture. This leads to chapped lips and dry skin, and static electricity tends to build up on non-conductive surfaces. When we use the static eliminator, there will also be various problems. This article will tell you how to solve the problem.

The air source used must be effectively filtered. Sometimes a secondary filter is required. Filters should be cleaned in time. Otherwise: water, oil and dust/ dust particles can enter the ion generation chamber and adhere to the inner wall of the plastic component. At a certain point, the ionic needle ignites it. Results cellular coke loss was gradually formed in plastic parts, and ion discharge decreased gradually. In particular, it creates security risks.

The air motor is mainly composed of stators, rotors, vanes and other parts. There are air distribution slots or holes for intake and exhaust on the stator, and long slots are milled on the rotor, and there are blades in the slots. The two ends of the stator are provided with sealing covers, and the sealing covers are provided with arc-shaped grooves which communicate with the inlet and exhaust holes and the bottom of the blade. The rotor and stator are eccentrically installed. In this way, several sealed working volumes are formed by the outer surface of the rotor, the blades (between the two blades), the inner surface of the stator and the two sealing end covers.

Diesel engines have been used in many industries and equipment since they were produced, including generators powered by diesel engines. The diesel-powered generators have no spark plugs, and their efficiency comes from compressed air. We all know that diesel-fueled internal combustion engines ignite the atomized fuel by injecting diesel into the combustion chamber, and the temperature of the compressed air in the cylinder increases, so it can burn instantly without spark ignition. Also, due to the high energy density content of diesel, diesel can provide more power than gasoline when burning the same volume of fuel.

No matter where you are, you can be affected by a power outage, especially in winter. Likewise, there are many industries that must have a reliable backup method to safely generate electricity when needed. For backup power systems, there are many types of generators that can be used to generate electricity in times of emergency. For now, there are two main types of generators, namely diesel generators and gas generators. However, what is the specific functions of these generators? Let’s learn about some differences between diesel and gas generators so that we can choose the most suitable backup power system.

Sound level meter is the most basic instrument in noise measurement. The sound level meter is generally composed of a condenser microphone, a preamplifier, an attenuator, an amplifier, a frequency weighting network, and an RMS indicator. The working principle of the sound level meter is: the microphone converts the sound into an electrical signal, and then the preamplifier transforms the impedance to match the microphone and the attenuator. The amplifier adds the output signal to the weighting network, performs frequency weighting on the signal (or external filter), and then amplifies the signal to a certain amplitude through the attenuator and amplifier, and sends it to the rms detector (or external power supply). flat recorder), the value of the noise sound level is given on the indicator head.

Water is one of the important environmental factors and an important component of the human body. The body water content of man accounts for about 65% of body weight, and the daily physiological water requirement of each person is about 2 to 3 liters. All physiological activities of the human body, such as thermoregulation, nutrient delivery, waste excretion, etc., require water to complete. Therefore, it is essential to measure water quality.

The diaphragm coupling consists of at least one diaphragm and two shaft sleeves. The difference between the single-diaphragm coupling and the double-diaphragm coupling is the ability to handle various deviations, which requires the diaphragm to bend, so the single-diaphragm coupling is not suitable for eccentricity. The double-diaphragm coupling can be bent in different directions at the same time to compensate for eccentricity.

Static electricity is an electric charge at rest. In the dry and windy days, people often come across this phenomenon in their daily life. Static eliminator plays a very important role in this situation. In the following, we will introduce the differences between active static eliminator and passive static eliminator.

An air motor is a device that converts the pressure energy of compressed air into rotational mechanical energy. Typically used as a source of rotational power for more complex devices or machines. Air motors are classified by structure into: vane air motors, piston air motors, compact vane air motors, and compact piston air motors. The air motor is a relatively precise power machine. It is strictly forbidden to knock or disassemble it during installation. It does not bear axial force, please install and use the air motor under the correct requirements.

The diaphragm coupling is suitable for working in high temperature (-80+300) and harsh environments, and can operate under shock and vibration conditions. The diaphragm coupling can compensate for the axial, radial and angular offsets between the main motor and the driven motor due to manufacturing errors, installation errors, load-bearing deformation and the influence of temperature rise changes. Diaphragm coupling is a flexible coupling of metal elastic element. It relies on metal coupling diaphragm to connect the main and slave motors to transmit torque. It has the advantages of elastic vibration reduction, no noise and no lubrication. Ideal for gear couplings and general couplings. The diaphragm coupling has obvious shock absorption, no noise and no wear.

KWe often hear shunt capacitors and series capacitors in circuit devices. So what is the difference between them? Today, we will introduce the differences between series capacitors and shunt capacitors.

A series capacitor is a reactive power compensation device. Usually series capacitors are used in EHV lines of 330kV and above. Its main function is to improve the system voltage from the perspective of compensating reactance, so as to reduce the power loss and improve the stability of the system. Capacitors must be able to withstand external forces due to short circuits, wind, snow and earthquakes. These mechanical forces are calculated through precise component analysis.

Static eliminator is composed of high voltage power generator and discharge electrode (generally made of ion needle), through the tip of high voltage corona discharge ionization of air into a large number of positive and negative ions, and then the wind blows a large number of positive and negative ions to the surface of the object to neutralize static electricity, or directly put the static eliminator near the surface of the object to neutralize static electricity.

BLDC motor (also known as brushless direct current motor) is a kind of permanent magnet synchronous motor. BLDC motor replaces the mechanical commutator on the brushed DC motor with an electric commutator, and is powered by a DC power supply through an integrated inverter or switching power supply to generate an AC signal to drive motor. It has the advantages of simple structure, no sparks during commutation, high operational reliability and low maintenance cost, so it has great advantages over traditional brushed DC motors in performance. BLDC motors have high efficiency and good operability, so they are widely used in various transmission industries.

The shunt capacitor is mainly used to compensate the reactive power of the inductive load of the power system to improve the power factor, improve the voltage quality and reduce the line loss. Today, in addition to a brief introduction to the main function of shunt capacitors, we mainly introduce the fault judgment and troubleshooting of shunt capacitors.

As the key elastic element of the diaphragm coupling, the diaphragm bears the main load during operation. When the diaphragm shaft coupling rotates, its angular offset will generate alternating stress, which alternates once per rotation. The dynamic stress of the diaphragm will lead to the fatigue damage of the diaphragm and the bolt, so the accurate calculation of the dynamic and static composite stress is the key to predict the life of the diaphragm shaft coupling and the operation of the diaphragm shaft coupling.