Line, bit and resolution concepts of incremental encoders

incremental encoderThe line, bit, and resolution concepts of

One,incremental encoderstrands

The encoder code disk of the week engraved line, incremental code disk engraved line can be 10 lines, 100 lines, 2500 lines of engraved lines, as long as the code disk can be engraved, can be any number of options; absolute value of the code disk of the code disk engraved line due to the Gray code arrangement method, decided that it is basically a power of 2 lines, such as 256 lines, 1024 lines, 8192 lines, etc. SSI signal converter monitor through the coupling and other coupling parts will be the encoder The SSI signal conversion monitor connects the encoder shaft with the drum shaft or pinion shaft of the opener through couplings and other couplings, so that the encoder and the measured shaft rotate synchronously, and the rotation of the measured shaft is converted into the rotation of the encoder shaft, and the encoder value is collected through the special tester so as to accurately measure the displacement of the measured parts. And achieve the purpose of real-time measurement and control of the displacement of the measured parts. It is suitable for measuring the lifting height of all kinds of windlasses and screw closure gates. But the absolute value code disk also has special Gray residual code output, such as 360 lines, 720 lines, 3600 lines and so on.

Bit of incremental encoder

The nth power of 2. Since absolute encoders are often power-of-2 line outputs, most of them are expressed in ;bits ;but there are exceptions, such as 360, 720, and 3600 lines. A binary encoder is a device that converts an angular displacement or a linear displacement into an electrical signal. The former is called the code disk, the latter is called the code scale. According to the readout method encoder can be divided into contact and non-contact two kinds. Contact with the brush output, a brush contact conductive area or insulated area to indicate the state of the code is "1" or "0"; non-contact acceptance of the sensitive element is a photosensitive element or a magnetic element, the use of light-sensitive components to light-transmitting and light-impermeable areas to indicate that the state of the code is "1" or "0"; non-contact acceptance of sensitive elements are photosensitive elements or magnetic elements, using light-sensitive elements to transmittance and opacity of light to indicate The state of the code is "1" or "0". Incremental encoders convert displacement into a periodic electrical signal, which is then converted into counting pulses, and the number of pulses is used to indicate the size of the displacement. Incremental encoders are also expressed in bits, such as 15-bit, 17-bit, which are multiplied by the number of calculated lines through internal subdivision, generally greater than 10,000 lines, it is expressed in terms of ;bits.

III. Resolution of incremental encoders

Encoder can distinguish the angle (angle), for general calculations, to 360 degrees / number of lines calculated, most of the current direct use of how many lines to express. But so there are some concepts of confusion (to blur), such as incremental value encoder, such as using the A/B two-phase quadruple frequency, 2500 lines, the resolution can actually be 360/10,000, if the internal subdivision of the line can be calculated more, up to 15, 17-bit, so often the incremental encoder with the line to express, on behalf of the frequency has not been subdivided by the frequency, with the expression of a bit, is already subdivided. , is already subdivided.