An optical encoder of the present invention includes a light-receiving element unit 5, moving slit 2 and fixed slit 3. The light-receiving element unit 5 includes a pattern 5B for detecting infiltration of liquid.

An optical monitoring method and system for monitoring a component may include an imaging sub-system including at least one camera having a first optical path and a second optical path. The first and second optical paths may include respective first and second direct lines of sight. A region of interest of the component is outside of at least one the first and second direct lines of sight. The region of interest may include at least one image correlation feature. A reflector sub-system alters the first and second optical paths so that the region of interest is within the first and second optical paths.

Technologies for producing training data for identifying degradation of physical components include a system. The system includes circuitry configured to apply an accelerated degradation process to a physical component of an industrial plant. Additionally, the circuitry of the system is configured to obtain measurement data indicative of visual characteristics of the physical component at each of multiple phases of degradation, wherein the measurement data is usable to train a neural network to identify a phase of degradation of another physical component.

A shape measuring apparatus applies, to a light beam, a periodic pattern having periodicity in a direction perpendicular to an optical axis and displaceable in the direction perpendicular to the optical axis, relatively displaces a focal point of an objective lens in a direction parallel to the optical axis, and calculates, based on amplitude of intensity of the light beam detected by a photodetector, face shape data on the object to be measured. Then, a top surface measuring step of acquiring face shape data on a top surface of the object to be measured, and a bottom surface measuring step of acquiring face shape data on a bottom surface of the object to be measured by transmitting through the top surface of the object to be measured and aligning the focal point of the objective lens on the bottom surface of the object to be measured are performed.

A method of manufacturing a polymer film includes melting a resin, extruding the melted resin through a die to produce a polymer film, shaping the polymer film, cooling the polymer film, illuminating a surface with a light source, capturing an image of a shadow cast by the polymer film on the surface while the polymer film is between the light source and the surface, calculating a frequency spectrum of at least a portion of the captured image, and adjusting a process parameter of the melting, the extruding, the shaping, or the cooling based on the frequency spectrum.

A true stress testing system broadly comprising a force input machine, an imaging system, and a computer. The imaging system includes a light source for projecting a light beam at the specimen in a first direction and a camera positioned on an opposite side of the specimen for receiving portions of the light beam not blocked by the specimen such that a shadow image of the specimen is created via the camera. The computer may determine a minimum dimension of the specimen perpendicular to the first direction at a point in time over a plurality of points along the force axis via the shadow image of the specimen such that the processor accounts for changes in position of the minimum dimension along the specimen. A true stress of the specimen may then be determined according to the minimum dimension of the specimen perpendicular to the first direction at the point in time.

A method for configuring a sensor of a non-interference stress management system is disclosed. The method may include determining a focal distance between a light transmitting fiber and a transmit lens, the focal distance configured to focus light from the transmit fiber to form a focused transmit beam, the transmit beam targeting a reflective structure. The method may further include positioning the light transmitting fiber and the transmit lens, wherein the light transmitting fiber and the transmit lens are separated by a transmit gap based on the focal distance and positioning a light receptive fiber and a receive lens to receive a focused reflected beam from the reflective structure, wherein the light receptive fiber is separated from the receive lens by a receive gap based on the focal distance.

A monitoring system includes an axle weight measurer and a state estimator. The axle weight measurer detects a surface displacement of a road from a first captured image obtained by imaging the road when a vehicle passes at a predetermined spot of a structure having the road that the vehicle passes, and calculates an axle weight of the vehicle from the surface displacement and a displacement coefficient of the road. The state estimator generates an axle weight distribution from the axle weight calculated by the axle weight measurer, and estimates a deterioration degree of the structure, using the axle weight distribution.

The present invention relates to a method of analyzing strain of a thin film by using a Strain Tensor Using Computational Fourier Transform Moiré (STC) method, and the method includes: receiving two Bragg peaks selected from a reciprocal lattice image obtained by Fourier transforming a two-dimensional (2D) lattice image of a thin film; shifting the two received Bragg peaks to an origin point of the reciprocal lattice image; calculating a moiré fringe pattern by Fourier-inverse-transforming the two Bragg peaks shifted to the origin point; calculating a strain tensor by differentiating the calculated moiré fringe pattern; and analyzing strain of the thin film by using the calculated strain tensor. The present invention, it is possible to obtain a considerably accurate strain analysis result with minimal errors even in the case where strain of a thin film is complex, and measure shear strain, as well as axial strain, of a thin film.

A wind tunnel for a motor vehicle, with a fan, a test section, through which an air stream generated by the fan can flow, a recording device for recording different motor vehicles within the test section, and a testing device for determining aerodynamic characteristics of the motor vehicle. The wind tunnel also includes an optical sensing device for sensing an outer contour of the motor vehicle recorded by the recording device, an evaluating unit and a linking unit. The evaluating unit determines a vehicle configuration from the outer contour of the motor vehicle sensed by the optical sensing device. The linking unit links the vehicle configuration of the motor vehicle determined by the evaluating unit with the test results determined by the testing device.