Principle of absolute encoder
Principle of absolute encoder
1. The principle of absolute encoder-introduction
The absolute value encoder outputs pulses when it rotates, and calculates its position through the counting device. When the encoder does not move or the power fails, it relies on the internal memory of the counting device to remember the position. In this way, when the power is off, the encoder can't have any movement. When the power is on, the encoder can't lose the pulse due to interference during the pulse output. Only the wrong production result can be known.

2. Principle of absolute encoder-structure
The absolute encoder is connected with the measured "object", which can directly measure the angle or indirectly measure the length by adding a conversion device. There are photoelectric, contact and magnetoelectric types. It consists of a code disc and a mechanism for reading code disc information. The resolution is determined by the number of "digits". For example, a 10-bit single-turn absolute encoder can read 1024 codes on a 360-degree circle, and the angular resolution is: 360/1024 (degree).

3. The principle of absolute encoder
Absolute encoder principle: There are many optical channel engraved lines on the optical code disc of absolute encoder, and each engraved line is arranged in 2 lines, 4 lines, 8 lines, 16 lines..., so that in each position of the encoder , By reading the open and dark of each engraved line, a set of unique binary codes (Gray codes) from the zero power of 2 to the n-1 power of 2 is obtained, which is called n-bit absolute code Device. Such an encoder is determined by the mechanical position of the photoelectric code disc, and it is not affected by power failure or interference.

4. Principle of absolute encoder-application
Each position determined by the mechanical position of the absolute encoder is unique. It does not need to be memorized, do not need to find a reference point, and does not need to be counted all the time. It is widely used in water conservancy, light industry, machinery, metallurgy, textile, petroleum, aviation, navigation, etc. industry. Specific to the engineering projects, such as: turntable, gate opening, valve opening, hoist crane positioning, driving positioning, level measurement, missile launch angle positioning, missile air rudder measurement, electronic theodolite and other high-precision measurement and positioning occasions.
