82results about How to "Easy defect detection" patented technology

The invention provides a solar silicon wafer defect detecting system. The solar silicon wafer defect detecting system comprises a visual image acquisition system, an image processing system and a sorting system; the visual image acquisition system is used for automatically acquiring images of silicon wafers on an automatic silicon wafer production line; the image processing system is used for analyzing the acquired silicon wafer images, automatically identifying the silicon wafer images and sending identification signals to the sorting system; and the sorting system is used for executing the signals of the image processing system, sorting out defective silicon wafers and sorting the silicon wafers with the same defects into same sorting boxes to realize accurate sorting of the silicon wafers. The invention also provides a detecting method based on the solar silicon wafer defect detecting system disclosed by the invention; the silicon wafers can be conveyed rapidly and rapid defect detection of the silicon wafer images can be carried out; and a high-speed and high-precision visual detection requirement of the production line can be met.

Inspection systems, circuits and methods are provided to enhance defect detection by addressing saturation levels of the amplifier and analog-digital circuitry as a limiting factor of the measurement detection range of an inspection system. In accordance with one embodiment of the invention, a method for inspecting a specimen includes directing light to the specimen and detecting light scattered from the specimen. However, the step of detecting may use only one photodetector for detecting the light scattered from the specimen and for converting the light into an electrical signal. The step of detecting also includes generating a first signal and a second signal in response to the electrical signal, where the second signal differs from the first. For example, the first signal may be generated to have a higher resolution than the second signal for detecting substantially lower levels of the scattered light. In most cases, the method may use the first signal for detecting features, defects or light scattering properties of the specimen until the first signal reaches a predetermined threshold value. Once the predetermined threshold value is reached, however, the method may use the second signal for said detecting.

A pattern forming method that includes forming a pattern for detecting defective discharges of a plurality of ink discharging nozzles and recording a first dot pattern with the plurality of ink discharging nozzles. The pattern forming method also includes recording a second dot pattern to be adjacent to at least one side of the first dot pattern in the predetermined direction.

Apparatus for searching for and detecting defects on parts that are substantially inaccessible, being located behind a wall, the apparatus comprising a first endoscope for illumination in visible light and for observation, the first endoscope and pipes for feeding and spraying penetration test substances being housed together in a rod which can be passed through an orifice in the wall in order to examine a part, the apparatus further comprising a second endoscope independent of the first endoscope and the rod for illuminating in ultraviolet light and for observing the portion of the part that has been treated by the penetration test substances.

An apparatus for automatically assessing the quality of a printed circuit board assembly using digitized video image analysis. The apparatus integrates with existing relatively low precision automated surface mount technology (“SMT”) manufacturing systems as an inspection station insertable at various steps in the assembly process or as a separate manually loaded station. The inspection station includes a high resolution video imaging system and a video image analyzer comprising an onboard master computer that generates control signals to reposition the camera mounted within a screen on a movable carriage and/or reposition the circuit board, and adjust the lighting; and generates individual board status data to be archived, graphically displayed on monitors or otherwise utilized by a rework station.

An improved method for defect detectability for the inspection of liquid filled pipes using magnetostrictive sensors. The improved method comprises first recognizing the liquid-induced changes in the dispersion properties of the second longitudinal wave mode, L(0,2). These liquid-induced changes include a severe dispersion at periodic branching frequencies that result in a pulse-like characteristic in the extended received signal. A trailing portion of a received signal component associated with a geometric irregularity, is shown to comprise the branching frequency components. The trailing portion of the extended signal may therefore be removed in order to improve defect detection. The removal process comprises one of three alternative methods. A first method includes creating a short duration pulse free of the frequency components that comprise the trailing signals, and applying the pulse to a magnetostrictive transmitter, thereby generating a longitudinal wave signal in the pipe wall free of the trailing signal frequency components. A second method comprises transmitting a broadband signal and processing the detected signal through a digital filter that eliminates those frequency components known to comprise the trailing signals. A third method involves using a signal whose bandwidth lies in the region between two adjacent branching frequencies in the dispersion curve. The result is a detected signal within which components representative of irregularities are less extended and therefore less likely to override subsequent defect components in the detected signal.

With respect to two or more NC data points among a group of dots together representing a tool locus, a curvature radius of the tool locus is determined. Then, the NC data point and its succession with other points is displayed in a display color determined according to the magnitude of the curvature radius. Alternatively, a movement direction of each minute segment relative to a specific axis selected from the three (XYZ) axes is determined as either positive, negative, or zero, and the minute segment or an end point thereof is display with the display property determined according to the movement direction. Still alternatively, after a specific axis is selected from the three (XYZ) axes, a region relative to the selected region is divided along the selected axis, for predetermined dividing width, first beginning with a predetermined reference point, and the resultant divided regions are given predetermined display properties. Then, a tool locus is displayed in the three-axial (XYZ) system according to the display properties given to the respective divided regions.

The invention provides a bamboo piece defect detection method and a bamboo piece defect detection system. The method comprises the following steps: optimizing the quality of bamboo piece images collected; rotating the bamboo piece images to a horizontal position; cutting the bamboo piece images to a standard size; carrying out preliminary texture detection, contour defect detection and front and back detection on the bamboo piece images; carrying out depth texture identification through a support vector machine classifier; and finally, screening out qualified bamboo pieces. By implementing multiple detection steps on bamboo piece images and carrying out depth texture identification through the support vector machine classifier, qualified bamboo pieces are screened out. The result obtained is accurate. The production efficiency of mahjong mats can be improved, and the profit can be increased for enterprises.

The present invention provides one kind of grey mask capable of making transmissivity controllable and homogeneous film thickness and its making process. For example, on the transparent substrate, transmissivity controllable film, low transmissivity film and photoresist film are formed successively; the photoresist film and the low transmissivity film in some part are eliminated to form transparent part; and the photoresist film and partial low transmissivity film in some other part are eliminated to form grey part and to make grey mask.

A mask inspection system with Fourier filtering and image compare can include a first detector, a dynamic Fourier filter, a controller, and a second detector. The first detector can be located at a Fourier plane of the inspection system and can detect a first portion of patterned light produced by an area of a mask. The dynamic Fourier filter can be controlled by the controller based on the detected first portion of the patterned light. The second detector can detect a second portion of the patterned light produced by the section of the mask and transmitted through the dynamic Fourier filter. Further, the mask inspection system can include a data analysis device to compare the second portion of patterned light with another patterned light. Consequently, the mask inspection system is able to detect any possible defects on the area of the mask more accurately and with higher resolution.

The invention discloses an eddy current detection method using finger touch as supplementary means and a device thereof. A coil capable of being used for realizing eddy current detection is wound in the shape of a pancake or arranged on a flexible circuit board to form a small sensor capable of flexibly bending, then the small sensor is mounted on a finger of a human body (namely an operator), and the finger is used as the framework of the coil. As the small sensor is capable of flexibly bending, the small sensor is adapted to the surface of a metal structural member along with the flexible motion of the surface of the finger. Synchronously, by adopting the sensitivity of human body contact and the flexibility of the finger, the small sensor can conveniently move on the detected surface of the metal structural member without being influenced by all obstacles such as pit, welding beading and the like. The finger touch can be used for supplementary location and judgment so as to improve the accuracy and adaptive capacity of detection result. The method is particularly suitable for defect detection on the complex surface of the metal structural member.

The invention discloses a geometric correction method and system for detecting the lateral deviation of an image of a printed matter, and the method comprises the steps: building a smoothing kernel for row pixels of an image collected by a linear array camera according to the vibration amplitude, causing the distortion of the lateral deviation, of printing equipment; carrying out the lateral smoothing of the pixels of a reference image and a to-be-detected image row by row through the smoothing kernel; respectively calculating the absolute value pairs for the lateral smoothing of each row; selecting a minimum subtraction value, corresponding to each row, from the absolute value pairs of each row; determining the lateral coordinates of the pixel positions according to the lateral coordinates of the pixel positions of each minimum subtraction value during the obtaining of the minimum subtraction values; calculating the offset of the row pixels according to the lateral coordinates of thepixel positions so as to correct the lateral distortion of the pixels of the to-be-detected image to the reference image, thereby facilitating the subsequent detection of the defects of the printed matter through the to-be-detected image, guaranteeing the comparison premise of a single variable of two images, reducing the differential artifact greatly, and reducing the defect detection error rate.

The invention discloses a multi-angle line light source for detection, which comprises a plurality of strip line light sources, line light fixing plates arranged at both ends of the strip line light source for fixing, and fan fixing plates arranged on both sides of the line light fixing plate 1. A cover plate is provided on the top of the line light fixing plate. There are cooling fans on the fan fixing plate and the cover plate. The fan fixing plate and the line light fixing plate form a downward light-emitting gap. Both ends of the board, the base plate is attached with a heat dissipation silicone grease sheet, and the heat dissipation silicone grease sheet is attached to a PCB board. There are many high-power LED lamp beads on the PCB board. The inner cavity of the light source has a cylindrical condenser lens at the opening of the inner cavity of the line light source, the end plate is fixedly connected with the line light fixing plate, and the center line of the cover plate has a camera detection through hole. The invention has better light concentrating effect, stronger light and higher brightness, and is more conducive to the lighting detection of various defects of mobile phone screens and the surface of PCB boards, etc., and has better detection effect.