The principle of electromagnetic induction relative displacement between the two windings of the planar element is converted into an electric signal measurement, length measurement tools. Inductosyn (known as encoder, grating) is divided into two types of linear and rotary encoder. The former by the length and composition of the slider for linear displacement measurement; the latter by the stator and rotor, is used for measuring the angular displacement. 1957 United States R.W. Tripp has made in the United States Inductosyn patents, formerly known position measuring transformers, sensors synchronizer is its trade name, initial radar antenna for positioning and automatic tracking, guided missiles and so on.
Machinery manufacturing, the induction synchronizer commonly used in digital control machine tools, machining centers and other positioning feedback system and coordinate measuring machines, boring machines and other measuring digital display systems. It requires a lower environmental conditions, can have a small amount of dust, oil mist normal work environment.
Continuous cycle on winding length of 2 mm. There are two windings on a sliding scale, with the same period on its length, but staggered 1/4 cycle (electrical phase 90 ¡ã). Inductosyn works in two phase and amplitude discriminator type type. The former is the two phase 90 ¡ã, the same frequency and amplitude of the AC input voltage U1 and U2 are two windings on a sliding scale, in accordance with the principle of electromagnetic induction, the winding length will produce EMF U. As the slider moving relative length, the phase U corresponding change, after amplification and U1 and U2 than the phase shift amount, segmentation, counting can be derived slider.
In the amplitude discriminator type, enter the slider winding frequency, same phase and different amplitude AC voltage according to the magnitude of change in the input and output voltage can also be obtained amount of displacement of the slider. By the induction and synchronous amplification, shaping, phase ratio, segmentation, counting, display systems and other components of electronic parts called Inductosyn measurement system. Its length measurement accuracy of up to 3 m / 1000 mm, angle measurement accuracy up to 1 "/ 360 ¡ã.
Previous£º How get the right encoder and get it right
