Working principle of absolute encoder

There are many tracks on the optical disc of the absolute encoder, the order of each track is 2, 4, 8, 16 lines. In this way, at each position of the encoder, by reading the brightness of each reticle, a set of unique binary codes (Gray codes) 2 to the n-1 power of 2 are called n-bit absolute encoder. This kind of encoder is determined by the mechanical position of the photoelectric code disc is affected by power failure interference.

Each position determined by the mechanical position of the absolute encoder is unique. It does require memory, does need to find a reference point, does need to keep counting. When it needs to know its location, when to read its location. In this way, the anti-interference performance of the encoder the reliability of the data are greatly improved.

single-turn absolute encoder to multi-turn absolute encoder

Rotating single-turn absolute encoder measures each engraved line of the photoelectric code disc during the rotation process to obtain a unique code. When the rotation exceeds 360 degrees, the code returns to the origin, which does comply with the principle of absolute code uniqueness. This kind of encoding can only be used for measurement within a 360-degree rotation range, is called a single-turn absolute encoder.

If you want to measure more than 360 degrees of rotation, you must use a multi-turn absolute encoder.

The encoder manufacturer uses the principle of a clock gear mechanism. When the center code disc rotates, the gear drives another set of code discs ( multiple sets of gears, multiple sets of code discs), the number of revolutions is added to the single-turn code. When encoding, in order to expand the measuring range of the encoder, such an absolute encoder is called a multi-turn absolute encoder. It is also a code determined by the mechanical position. Each position code is unique does repeat, does need to be memorized.

Another advantage of the multi-turn encoder is that due to the large measurement range, the actual use is often rich, so there is no need to find the change point during installation. A certain intermediate position can be used as the starting point, which greatly simplifies the difficulty of installation debugging.

DEUPREE (Qingdao) Industrial Technology Co., Ltd. is an integrated enterprise focusing on the research development of automated industrial technology equipment manufacturing. The company’s products mainly include rotational motion sensors, linear displacement sensors, object recognition sensors, laser rangefinders, process Control measurement instruments, signal detection systems, signal transmission systems, immature drive systems, UPS safety power supply systems, automation equipment energy-saving cleaning auxiliary equipment systems are limited to this. We can also customize flexibly customize according to customer needs. Meet the different needs of different customers.