German vanwyk encoder vanwyk model vanwyk price

vanwyk encoders belong to the detection and transmission stage in closed-loop control. They are used to detect the rotor magnetic field position of servo motors, provide accurate motor speed and position signals, and then the magnetic encoder outputs signals to the drive for analysis, comparison, and logical judgment, finally driving the servo motor. In fact, a magnetic encoder is a sensor that constantly provides accurate signals to the drive to facilitate precise analysis and judgment.

vanwyk encoder working principle

The magnetic encoder consists of an optical code disk with a central shaft, featuring annular transparent and opaque graduations, read by photoelectric emission and reception devices to obtain four sets of sine wave signals combined into A, B, C, and D. Each sine wave has a phase difference of 90 degrees. By inverting the C and D signals and superimposing them on the A and B phases, signal stability is enhanced. Additionally, one Z phase pulse is output per revolution to represent the zero reference position. Since the A and B phases differ by 90 degrees, the direction of rotation (forward or reverse) of the magnetic encoder can be determined by comparing which phase leads. The zero reference position is obtained via the zero pulse. Code disk materials include glass, metal, and plastic. Glass code disks have very thin graduations deposited on glass, offering good thermal stability and high precision. Metal code disks use direct transparent and opaque graduations, but due to the thickness of the metal, precision is limited, and thermal stability is an order of magnitude worse than glass. Plastic code disks are an economical option. The principle of magneto-electric encoders is similar to that of optical encoders, but they use magnetic field signals. Inside a magnetic encoder, a magnetic rotor and a magnetoresistive sensor are used. The rotation of the magnetic rotor causes changes in the internal magnetic field strength. The magnetoresistive sensor detects these changes, and after signal processing by the circuit, outputs the signal. The number of magnetic poles on the magnetic rotor, the number of magnetoresistive sensors, and the signal processing method determine the resolution of the magnetic encoder. The advantage of using magnetic field principles to generate signals is that magnetic signals are not affected by dust, moisture, high temperatures, or vibration.

vanwyk encoder categories

An absolute encoder is a sensor that directly outputs digital values. Its circular code disk has several concentric code tracks along the radial direction. Each track consists of alternating transparent and opaque sector-shaped areas. The number of sectors in adjacent tracks follows a double relationship. The number of code tracks on the disk corresponds to the number of bits in its binary code. On one side of the disk is a light source, and on the other side, there is a photosensitive element corresponding to each code track. When the disk is in different positions, each photosensitive element converts the presence or absence of light into corresponding level signals, forming a binary number. The characteristic of this type of encoder is that it does not require a counter; a fixed digital code corresponding to the position can be read at any position of the rotating shaft. Obviously, the more code tracks there are, the higher the resolution. For an encoder with N-bit binary resolution, its code disk must have N code tracks. Absolute encoders use natural binary or cyclic binary (Gray code) methods for photoelectric conversion. The difference between absolute encoders and incremental encoders lies in the transparent and opaque line patterns on the disk. Absolute encoders can have various coding schemes. By reading the code on the disk, the absolute position is detected. Coding designs can adopt binary code, cyclic code, two's complement binary, etc. Its characteristics are: 1.2.1 The absolute value of the angular coordinate can be read directly; 1.2.2 There is no cumulative error; 1.2.3 Position information is not lost after power cutoff. However, the resolution is determined by the number of binary bits, meaning accuracy depends on the number of bits. Currently, there are 10-bit, 14-bit, and other variants.

vanwyk encoder technical specifications

High-definition encoders, also known as digital encoders, video encoders, HD video encoders, digital TV encoders, network video encoders, or digital video encoders, primarily function to perform digital encoding processing on input digital audio-video signal sources (including HDMI signal sources, SD-SDI signal sources, and HD-SDI signal sources). Common encoding methods include MPEG-2, MPEG-4, H.264, and H.265. These are encoded into TS stream data suitable for real-time transmission. The data stream is then encapsulated in ASI format or IP format for output to downstream equipment, such as IPQAM modulators, digital TV modulators, digital modulators, and DTMB modulators. The ASI format typically uses BNC interface output, while the IP format uses a 1000M Ethernet interface with RJ45 connectors. IP data streams generally support protocols such as TS/HLS/RTSP/FLV/RTMP/UDP/RTP/unicast/multicast.

Weidou Intelligent Technology professionally sells German vanwyk rotary encoders, vanwyk incremental encoders, vanwyk absolute encoders, vanwyk optical encoders, vanwyk magneto-electric encoders, vanwyk shafted encoders, vanwyk hollow shaft encoders, vanwyk contact brush encoders, vanwyk angle encoders, vanwyk linear encoders, vanwyk digital encoders, vanwyk draw-wire encoders, vanwyk position encoders, vanwyk hollow bore encoders, and vanwyk spindle encoders. vanwyk products are original imports from Germany. Customers are welcome to inquire and place orders.