A. Digital pulse.

When the scale grating moves relative to the indicating grating, it forms alternating light and dark grating stripes distributed roughly in a sinusoidal pattern. The stripes move at the relative motion speed of the grating.

Directly illuminate the photoelectric elements, and obtain a series of electrical pulses at their output ends. Through amplification, shaping, direction identification and counting systems, digital signal output is generated to directly display the measured displacement.

Extended information:

When the temperature, stress, strain or other physical quantities of the environment in which the fiber grating is located change, the period of the grating or the refractive index of the fiber core will change, resulting in The wavelength of the reflected light changes. By measuring the change in the wavelength of the reflected light before and after the physical quantity changes, the changes in the physical quantity to be measured can be obtained.

If the magnetic field-induced refractive index changes of left and right circularly polarized waves are different, direct measurement of the magnetic field can be achieved. In addition, through specific technologies, separate and simultaneous measurements of stress and temperature can also be achieved. By coating specific functional materials (such as piezoelectric materials) on gratings, indirect measurement of physical quantities such as electric fields can also be achieved.