A machine for weaving or winding a fiber preform on a mandrel having an axis of rotation that is substantially horizontal and that serves to receive the preform, the machine having a plurality of cameras pointing towards the underside of the fiber preform in order to scan the hidden face of the fiber preform and acquire images of the hidden face; an image analysis module for processing these images of the hidden face of the fiber preform in a plurality of adjacent scan windows, and for extracting weaving patterns therefrom and comparing them with reference weaving patterns previously stored in the module; a motor for driving the mandrel in rotation about its axis of rotation; and a control unit for stopping rotation of the mandrel if the result of the comparison reveals a difference of appearance between the two weaving patterns.

A laying head for a fibre placement device, in particular for fibre placement according to the AFP method, includes a placing roller which is permeable to laser light, at least in part, a laser light feed unit which is arranged in an inner space of the placing roller and a sensor which is designed and arranged to receive laser light reflected from a component on which the placing roller places a fibre band.

A manufacturing method of a laminated sheet having a printed layer includes, given that a table that associates density data of a specific area included in image data with a burnup degree of the printed layer corresponding to the specific area at printing based on the image data is an image-burnup degree conversion table, identifying the image-burnup degree conversion table that satisfies a printing condition for the laminated sheet, acquiring printed image data that is image data for forming the printed layer of the laminated sheet, and calculating the burnup degree of the printed layer based on the image-burnup degree conversion table and the printed image data. Also disclosed is a laminated sheet having a printed layer, a system for manufacturing the laminated sheet, and a program for manufacturing the laminated sheet.

Composite resin containing cellulose is irradiated with infrared light, reflected light from the composite resin irradiated with the light is received, normalization is performed at a peak position maximized in a peak at 2800 cm.sup.−1 or more and 3000 cm.sup.−1 or less, which is a C—H stretching peak caused by the composite resin, in a reflection or absorption spectrum obtained by the reflected light, and a reflection or absorption spectrum for determination is obtained. The spectrum is used to acquire a ratio value of a spectral intensity (background intensity) at a position of 1000 cm.sup.−1 or less according to a determined resin type and different from a wave number at which a peak derived from resin of the determined resin type is expressed, and a ratio of the spectral intensity (background intensity) is used so that a composite of cellulose combined in composite resin can be determined with high accuracy.

A method of detecting defects in a composite structure includes applying heat to a surface of a composite structure. Thermographic images or frames captured by a moving camera may be utilized to corm temporally aligned images that include temperature data (pixels) from a plurality of frames, wherein the pixels comprise data captured at a simple (uniform) time delay from the time at which heat was applied. The temporally aligned thermographic data for the surface region may include variations due to differences in thermal transients caused by defects in the composite structure. The variations in the thermographic data may be utilized to detect one or more defects in the composite structure.

An example system for inspecting a surface includes a laser, an optical system, a gated camera, and a control system. The laser is configured to emit pulses of light, with respective wavelengths of the pulses of light varying over time. The optical system includes at least one optical element, and is configured to direct light emitted by the laser to points along a scan line one point at a time. The gated camera is configured to record a fluorescent response of the surface from light having each wavelength of a plurality of wavelengths at each point along the scan line. The control system is configured to control the gated camera such that an aperture of the gated camera is open during fluorescence of the surface but closed during exposure of the surface to light emitted by the laser.

Systems, methods, and devices are provided for the creation of predictable and accurate defects in a fiber tow of an Automated Fiber Placement (AFP) process, with such artificial defects being useful to support calibration of an in situ inspection system used in the AFP process. Various embodiments include methods for creating such artificial defects that support calibration of an in situ inspection system of an AFP system or process. Various embodiments may also include a defect stencils for an AFP system or process.

There is provided a method for determining a quality of an abrasive surface preparation of a composite surface, prior to the composite surface undergoing a post-processing operation. The method includes fabricating a plurality of levels of abrasive surface preparation standards for a reference composite surface; using one or more surface analysis tools to create target values for quantifying each of the levels; and measuring, with the surface analysis tools, one or more abrasive surface preparation locations on the composite surface of a test composite structure, to obtain one or more test result measurements. The method further includes comparing each of the one or more test result measurements to the levels, to obtain one or more test result levels; determining if the one or more test result levels meet the one or more target values; and determining whether the composite surface is acceptable to proceed with the post-processing operation.

According to an embodiment, three-dimensional (3D) scan data representative of an in-service structure that is captured by a scanning device is accessed by a processor circuit. Based on the 3D scan data, in-service computer-aided design (CAD) data representative of an in-service surface corresponding to the in-service structure is generated by the processor circuit. Based on the in-service CAD data representative of the in-service surface, at least one of a serviceability level or remaining life estimate of the in-service structure is determined.

A method comprises determining a mechanical property of a rock sample taking into account (a) a respective amount of each of two or more constituent phases in the rock sample and (b) a corresponding mechanical property parameter associated with each of the two or more constituent phases.