Under continuous braking and long slope conditions of high intensity for a time, the temperature brake friction plate is extremely high, which leads to poor efficiency in process, even makes force completely lost, More more heavy-duty vehicles high-speed transport are equipped with retarders. As an auxiliary system, vehicle retarder can effectively maintain constant during braking. This paper d...

This paper proposes a model for the electromagnetic performance of dual air-gap liquid-cooled eddy current retarder (DAL-ECR) considering transient permeability. First, structure and working principle DAL-ECR are introduced. Next, analysis static flux density leakage end effect is established based on piecewise function method magnetic equivalent circuit (MEC). Then, skin field in retarder, an ...

This paper is focused on improving the performance of quantitative phase imaging via phase-shifting digital holographic microscope. The development interferometric techniques important for technology and biomedicine, since surface structure samples can be monitored in real-time by non-destructive investigations. novelty optical arrangement that reference beam microscope a liquid crystal variabl...

Polarized light carries information about the various physical parameters that have been acting upon it. Obtaining information on the observed object by studying the polarization of light reflected can be accomplished by several methods. The four Stokes parameters of the reflected light wave (S0, S1, S2, and S3) are generally estimated by observing the scene, with a CCD sensor, through a polari...

Background: Optical retarders are key elements for the control of the state of polarization of light, and their wavelength dependance is of great importance in a number of applications. Methods: We apply a well-known technique for determinig the spectral retardance by measuring the transmission spectra between crossed or parallel polarizers. But we we develop an optical system to perform this m...