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acome electrical components are linear devices based on metallic induction. The function of a sensor is to convert various measured physical quantities into electrical signals. In production processes, displacement measurement is generally divided into two types: measuring physical dimensions and measuring mechanical displacement. Depending on the form of transformation of the measured variable, displacement sensors can be classified as analog or digital. Analog types can be further divided into physical-property type and structural type. Commonly used displacement sensors are mostly analog structural types, including potentiometric displacement sensors, inductive displacement sensors, synchros, capacitive displacement sensors, eddy-current displacement sensors, and Hall-effect displacement sensors. An important advantage of digital displacement sensors is that they facilitate direct input of signals into computer systems. Displacement is a quantity related to the movement of an object's position during motion, and the scope of displacement measurement methods is quite extensive. Small displacements are typically detected using strain-gauge, inductive, differential transformer, eddy-current, and Hall-effect sensors. Large displacements are commonly measured using sensing technologies such as inductosyns, optical gratings, capacitive gratings, and magnetic gratings. Among these, optical grating sensors are increasingly widely used in industries such as machine tool machining and testing instruments due to their advantages, including ease of digitization, high precision (with current highest resolution reaching the nanometer level), strong anti-interference capability, absence of human reading errors, convenient installation, and reliable operation.

acome electrical component classification

Self-inductance occurs when current flowing through a coil generates a magnetic field around it. When the current in the coil changes, the surrounding magnetic field changes correspondingly. This changing magnetic field induces an electromotive force (induced EMF) in the coil itself (EMF represents the terminal voltage of an ideal power source in an active component); this is self-inductance. Electronic components made by winding wire with a specific number of turns, capable of producing a certain amount of self-inductance or mutual inductance, are commonly called inductor coils. To increase inductance, improve the quality factor, and reduce size, iron cores or magnetic cores made of ferromagnetic materials are often added. Basic parameters of inductors include inductance, quality factor, inherent capacitance, stability, rated current, and operating frequency. An inductor consisting of a single coil is called a self-inductor, and its self-inductance is also known as the self-inductance coefficient. Mutual inductance occurs when two inductor coils are placed close to each other; a change in the magnetic field of one coil affects the other. This effect is called mutual inductance. The magnitude of mutual inductance depends on the self-inductance of the coils and the degree of coupling between them. Components manufactured based on this principle are called mutual inductors.

acome electrical component principles

The basic principle of a multimeter is to use a sensitive moving-coil DC ammeter (microammeter) as the meter head. When a small current passes through the meter head, it provides a current indication. However, the meter head cannot handle large currents, so resistors must be connected in parallel and series with the meter head to shunt or drop voltage, thereby measuring current, voltage, and resistance in the circuit. In a digital multimeter, the measurement process involves a conversion circuit that converts the measured quantity into a DC voltage signal. Then, an analog-to-digital (A/D) converter transforms the analog voltage into a digital value. An electronic counter counts this value, and the measurement result is directly displayed numerically on the screen. The functions for measuring voltage, current, and resistance are implemented through the conversion circuit. Current and resistance measurements are based on voltage measurement, meaning that a digital multimeter is an extension of a digital DC voltmeter. The A/D converter in a digital DC voltmeter converts continuously changing analog voltage over time into digital values. An electronic counter then counts these digital values to obtain the measurement result, which is displayed by a decoding and display circuit. A logic control circuit coordinates the operation of the circuits, completing the entire measurement process sequentially under the action of a clock signal.

acome electrical component classification

Inductor coils commonly used in circuits are roughly classified as follows: By inductance form: fixed inductors, variable inductors. By magnetic core material: air-core coils, ferrite coils, iron-core coils, copper-core coils. By operational nature: antenna coils, oscillator coils, choke coils, trap coils, deflection coils. By winding structure: single-layer coils, multi-layer coils, honeycomb coils, close-wound coils, spaced-wound coils, self-supporting coils, honeycomb coils, and random-wound coils.

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