214 results about "Contact laser" patented technology

The invention discloses a method for non-contact laser cutting of a quartz glass product and a device thereof. The method comprises the following steps: firstly firing the quartz glass product with a laser beam emitted by a laser generator to form a groove, and then cutting off by using a pneumatic unit. The device provided by the invention comprises a laser automatic cutting unit and the pneumatic unit. According to the invention, the product quality can be guaranteed, crevasses can be reduced, the consistency of the kerf and the kerf section can be guaranteed, waste is reduced, thus the operation is safe; and the laser cutting has noncontact with the quartz glass tube or quartz glass rod, thus the speed of drawing is raised, the production cost is reduced, the labor intensity is reduced, and the yield is raised.

This disclosure describes the design and construction of high-precision off-axis optical imaging systems. The disclosure also describes the design and construction of high-precision mounting structures for rigidly holding optical elements in an optical imaging system. The disclosure further describes both a mechanism for highly stable mounting and a technique for high precision focusing of a detector in a complex optical setup. The disclosure even further describes both tooling and a technique used for focusing high precision optical imaging systems. The theory and use of at least these concepts are introduced by examining how these concepts aid the construction and use of a non-contact laser scanning system.

The invention relates to an on-line non-contact laser stereo scanning detection device for the internal screw threads of a tubing coupling, which is used for carrying out one-by-one all-around dynamic on-line three-dimensional stereo scanning detection on the tooth profile parameters of all the internal screw threads to be processed in the processing process of special purpose machine tools, suchas a threading machine tool of the tubing coupling and the like, to the internal screw threads. The on-line non-contact laser three-dimensional scanning detection device comprises an axial movement mechanism assembly, a radial rotation mechanism assembly and a laser detection probe assembly. The radial rotation mechanism assembly is fixedly connected with the end of the axial movement mechanism assembly, and the laser detection probe assembly is fixedly connected at the end of the radial rotation mechanism assembly. The invention has a three-dimensional stereo scanning detection function, cancarry out high-speed high-accuracy on-line laser stereo scanning on the tooth profiles of the sections of different radial axles of the internal screw threads of the tubing coupling and obtains the three-dimensional stereo geometric information of the tooth profiles of the internal screw threads of the tubing coupling. The invention can enhance the detection accuracy and speed of the parameters of the internal screw threads, lightens the labor strength of a detection worker greatly and avoids the influence of human factors to the measurement accuracy. Moreover, the invention can be used for on-line quality monitoring and prediction and enhances the product quality.

Methods and systems for forming face masks are disclosed. Embodiments may utilize computer-aided design and computer-aided manufacturing to form custom fitted face masks. System software may be configured to acquire facial topography information, design a mask based on the topography information, and send mask information to a computerized manufacturing device. The software may communicate with a scanning device for facial topography acquisition and a milling machine for pattern fabrication. In an embodiment, the scanning device may include a linear scan non-contact laser imager. In an embodiment, the scanning device may be manually moved with respect to an individual being scanned, thereby eliminating the need for motive apparatus. In such embodiments, position information may be determined based on data from a position sensor coupled to the scanning device.

The invention discloses a non-contact high-temperature thermophysical property parameter measurement device and a non-contact high-temperature thermophysical property parameter measurement method. The non-contact high-temperature thermophysical property parameter measurement device consists of an electric heating system, a laser generation system, a load system, a strain measurement system and a data acquisition and analysis system. Laser serves as an instant energy source, and the measurement time is shortened; a laser comparator is used for measuring deformation of a material in a high-temperature environment; a non-contact laser comparator is used for measuring a deformation value of the measured material sample under high temperature; therefore, the deformation error caused by thermal expansion can be avoided; the laser comparator can precisely measure a precise displacement or strain of the sample under a condition of high-temperature loading through fine scales, so that the reliability of a measurement result is improved, and the measurement process is simplified and is easy to control. A thermocouple is used for measuring the temperature in a low-temperature stage, and a far infrared temperature measurer is used for measuring the temperature in a high-temperature stage, so that equipment can realize measurement of the thermophysical property of the material within the range from room temperature to 2,000 DEG C. The verification shows that the equipment has the advantages that the running process is easy to control, the measurement time is short, the accuracy is high, and the like.

The invention relates to the technical field of machining for the glass cover plate of a mobile phone touch screen, and particularly relates to a machining method for the glass cover plate of a mobile phone touch screen. Compared with the traditional mechanical machining method, a laser cutting machine is adopted in the method, the four rectangle right angles of the rectangular glass cover plate are cut into circular angles by laser, and circular holes corresponding to mobile phone keys on the rectangular glass cover plate and a strip-shaped sound hole corresponding to a phone receiver are cut out. Compared with the traditional mechanical contact-type machining method, the adopted non-contact-type machining method has the following advantages that 1, any route curve can be cut by laser, so that the speed is fast and the effect is good during cutting for the circular angles and drilling; 2, laser machining belongs to non-contact machining, so that consumables are not used during the machining process, and the cost is reduced compared with the traditional CNC (computerized numerical control) cutting method; and 3, breakages or cracks are avoided during the non-contact laser cutting process, so that the yield of products is greatly increased.

The invention discloses a blade optical rapid measurement method based on a double-probe four-axis measurement system. According to the method, two non-contact laser displacement sensors are combined on one same four-axis measurement system, in a respective work scope, measurement of a certain special scope of a blade is respectively realized, the measurement results of the two sensors are fused, complete angle three-dimensional point cloud data of an object is acquired, and precise measurement of the blade is lastly realized. The method is advantaged in that a mode of combination of the two non-contact laser measurement probes is employed to carry out three-dimensional measurement of the object, a problem of incomplete data caused by utilizing a single probe for measurement in the prior art is effectively solved, a problem of point cloud data loss of a certain point angle caused by fixed measurement orientation is solved, and measurement precision is improved.

The invention provides a feature point extraction method based on multiple laser-assisted targets, belongs to the fields of image processing and computer vision detection, especially relates to a data processing method of laser-assisted multi-view data registration, and particularly discloses an extraction method based on a multiple laser-assisted target design and feature points. The method adopts a laser array projection laser strip construction registration target which is composed of multiple non-contact lasers, in the target, intersections of a laser grid are taken as the feature points of the registration, and a coordinate position of the target is extracted through a high-precision target feature point extraction algorithm. According to the feature point extraction method based on the multiple laser-assisted targets, the target based on the laser assistance is adopted, and better adaptability is achieved compared with an adhesive type target; by means of the method of determining a region of interest first and extracting the feature points accurately later, the precision and efficiency of extracting the feature points are effectively improved.

The invention provides a laser paint-removing system and method. The system comprises a control device, a laser marking machine, a detecting device and a cleaning device, wherein the control device is internally provided with laser marking software which sets the shape of paint to be removed and the position of removing the paint; the laser marking machine is connected with the control device and used for carrying out laser burning according to the set of the laser marking software; the detecting device is connected with the laser marking machine and is clung to the stream line and used for detecting the motion position of a product to be subjected to paint removal and controlling the laser marking machine to send laser; and the cleaning device is positioned at the downstream station of the laser marking machine and used for cleaning the incompletely dropping paint part. The laser paint-removing method comprises the steps of: 1, determining the shape of the paint to be removed and the position of removing the paint; 2, regulating the laser swinging speed; 3, detecting the position of a product; and 4, cleaning the paint removing surface. The invention has the advantages of achieving the paint-removing function by adopting a non-contact laser burning manner without damaging the internal material of the product, and being simple in operation.

The invention relates to a numerically controlled lathe-based contour laser online measurement device and a method thereof for rotary type structure characteristic parts, and designs an adjustable and detachable clamp for clamping a sensor. An assembly body is arranged on the tool rest of a lathe in the side edge positioning mode, and the position and orientation calibration of a measuring head is conducted based on a ceramic standard ball. After that, a measuring program is called, and the distance value between the curved-surface discrete point of a part and the measuring head is measured. In combination with the coordinates of the lathe, a one-dimensional distance value is converted into a three-dimensional coordinate value by adopting a compiling algorithm, and then point cloud data are obtained. The point cloud data are analyzed and processed, and a model of the point cloud data is reconstructed. Compared with a theoretical model, an error value and a generation reason thereof are analyzed. Therefore, the high-efficiency precise online measurement of the contour profile of a rotary part is realized. According to the invention, the online measurement and the error analysis for the contours of rotary type structure characteristic parts can be realized. The device and the method are fast in measurement speed and high in precision, thus having a good practical value and an excellent application prospect in the field of non-contact laser online measurement and research.

The invention relates to a non-contact laser range finding method of a railway platform gauge. The method comprises: (1), a laser range finding device is arranged beyond a railway platform safety line and when a power supply is turned on, the laser range finding device enters a working state; (3), heights of an instrument relative to a track top surface and a platform edge are measured respectively and a height difference value H of the track top and the platform surface is calculated; (4), horizontal distances between the instrument and the track side and between the instrument and the platform edge are measured respectively and a horizontal distance value L between the central line of the track and the platform edge is calculated; and (5), movement to a next measurement point is carried out and then measurement and calculation are carried out according to the above-mentioned steps. According to the invention, the whole measurement system employs a laser non-contact measurement technology; measurement equipment is arranged at the platform and laser signals are transmitted and received remotely; and position boundary line data are calculated precisely. The measurement tools and the staff are in a safety range relative to the train and no influence is caused on the train running during the whole operating process. According to the invention, the method is especially suitable for measurement work of a railway platform building gauge.

The invention discloses a laser ranging device and a measuring and controlling method for plasma arc additive manufacturing of wires. The device comprises a working platform, a substrate, a plasma welding gun, a laser displacement sensor and a clamp thereof, a computer and a robot control cabinet. The measuring and controlling method of the laser ranging device comprises the following steps: measuring the distance from the device to an overlaying layer by means of a non-contact laser displacement sensor; calculating the height of the overlaying layer by means of the computer; and communicatingto the robot control cabinet to adjust the height of the welding gun at the moment of arcing of a next overlaying layer. According to the laser ranging device and the measuring and controlling methodfor plasma arc additive manufacturing of wires disclosed by the invention, the heights of the overlay layers for plasma arc additive manufacturing of carbon steel, stainless steel and titanium alloywires can be detected, the height of from a nozzle to a member is controlled in the overlaying process, the height of the nozzle is automatically adjusted in the plasma arc additive manufacturing process, and problems that pressed wires and burned nozzle as the nozzle is too low and splattering and overlaying defects as the nozzle is too high in the overlaying process and the like are solved, so that the molding process is more precise and automatic, and the dimensional precision and the molding quality of molded parts are improved effectively.

A non-contact gauge and method of use is provided for optical measurement of an object or objects. The apparatus and methods may comprise a laser providing a projected laser beam; a work-piece holder for holding the object to be measured; a light sensitive sensor located to sense the beam as the beam is diffracted by at least one edge of the object and as the beam forms a near field Fresnel diffraction fringe pattern upon elements of the sensor. The laser and the sensor are located to enable near-field Fresnel diffraction. A fringe pattern signal analyzer may be included for computing mathematical algorithms to determine the position (X₀) of at least one edge of the object based upon the diffraction pattern sensed by the sensor wherein the fringe pattern signal analyzer is structured to refine sensed fringe pattern edge position data to be more accurate based upon a theoretical diffraction compensation factor.

The invention provides a non-contact laser surface displacement monitoring device with a tilt correction function. The device is characterized in that the monitoring device comprises a laser receiving and emitting end, a laser reflecting end, a corresponding communication module and upper computer software, wherein the laser receiving and emitting end comprises a radio frequency module, a double-axis tilt angle sensor, a temperature sensor, a laser range finder, a laser beam device and a mapping base, the laser reflecting end comprises a two-dimensional PSD displacement sensor, auxiliary parts of the two-dimensional PSD displacement sensor, an installation support, a range adjusting knob, a driving control circuit and a wireless communication module, the communication module is used for remote communication of field monitoring data, and the upper computer software is used for acquisition and analysis of monitoring data. The device has the advantages that automatic monitoring of plane displacement and vertical displacement of deformable bodies can be achieved at the same time, redundant observation quantity is sufficient, self-correction and self-inspection of monitoring data can be achieved, and the reliability of monitoring results is high.

The invention discloses a bionic design method for a microtexture turning tool with a gradient changed depth. The method comprises the following steps of using a non-contact laser scanner to acquire bamboo rat incisor point cloud data, reconstructing a three-dimensional incisor model, and extracting crescent-shaped depth data of incisors; aiming at dry turning of aluminum alloy 7075 by using a hard alloy YG6A tool, when the distance of 10 microns from texture to a cutting edge, a groove depth of 7 microns, a groove width of 12 microns, and the groove space of 30 microns are determined by usingfinite element simulation and experiments during a turning process, achieving the best turning characteristic by a texture tool; and in combination with temperature distribution of the front tool plane of the turning tool, using the crescent depth data value to bionically design the microtexture turning tool with the gradient changed depth. When the microtexture with gradient changed depth is close to the cutting edge, the texture depth is small, and the texture depth is firstly increased and then reduced along with the texture that keeping away from the cutting edge. The method provided by the invention reserves the characteristic that the texture is reduced in cutting force of the tool, also improves the structural strength of the tool, and has the advantages of prolonging the service life of the tool and improving economic value of the tool.

The invention relates to a non-contact laser welding technique which comprises the following steps: a. placing tin balls in a container filled with nitrogen; b. melting the tin balls with a laser; and c. blowing the molten tin balls to the position to be welded on the workpiece under the pressure of nitrogen. The application of non-contact laser system: common welding techniques, which mainly carry out welding in an electric soldering iron heating mode, are contact welding techniques; and by adopting laser welding, the invention ensures the welding quality, solves and realizes the non-contact welding technique. The invention uses colophony-free welding technique to prevent colophony from polluting an object, thereby enhancing the welding quality; the invention can use an auxiliary image vision system to locate the solder position, and the positioning accuracy can be below 0.015 millimeter, thereby having the advantages of quick positioning and high accuracy; and nitrogen drives tin balls to be ejected out of the tin ball container with high speed and stability, and thus, the invention can also prevent oxidation in the process of high temperature melting and solidification.

The present invention relates to a non-contact laser displacement measurement system used for cement-based materials, which belongs to the strain measurement technique of cement-based gelling materials in processes of hydration as well as dehydration. The system is characterized in that: in the aspect of hardware constitution, the system comprises a laser displacement sensor and fixing supports thereof, a temperature signal sensor, rotary knobs which are used for adjusting positions in horizontal and vertical directions and installed on the fixing supports, a cement-based material mold, tested samples of the cement-based materials, laser signal reflection targets embedded in the tested samples of the cement-based materials, a computer, and a controller which is provided with a displacement signal processing module of the samples, a temperature signal processing module of the samples, and a data collection card; in the aspect of software: the computer is installed with measurement and analysis softwares for calculating strain quantity of the related samples based on temperature variation. The invention has the advantages of being high in testing precision, quick in sampling frequency, free from surrounding electromagnetic interference during the testing process, and impervious to material quality and color of the samples.

The invention is a non contact laser inspection self centering device to inspect the counter sink portion of a counter sunk fastener hole on a surface. In detail, the self centering and seating device includes a combination laser transmitter and receiver for transmitting a laser bean across a surface and for receiving the return signal from the surface. A self centering device is attached to the combination laser transmitter and receiver for aligning the laser transmitter with the fastener hole such that the transmitted and received laser beam passes across the center of the counter sink portion of the fastener hole. A computer system is connected to the combination laser transmitter and receiver for analyzing the transmitted and returned laser signal from the surface and determining if the counter sink portion of the hole is within tolerance.

The invention discloses a laser focus control system, an application of the laser focus control system and a laser cleaning head. The laser focus control system comprises a laser distance measuring meter, a field lens and a calculation and display unit, wherein a distance measuring laser beam sent by the laser distance measuring meter passes through the field lens, then is irradiated onto the surface of a workpiece and measures distance, the laser distance measuring meter is electrically connected with the calculation and display unit, the laser distance measuring meter and the calculation and display unit input a distance measuring result, and the calculation and display unit outputs at least one signal. The laser focus control system can monitor the defocusing distance in real time, is applicable to the field of laser cleaning, can achieve non-contact laser cleaning, particularly cleaning in narrow spaces, and can improve the cleaning quality and efficiency.

The invention relates to a non-contact laser detecting instrument for displaying the roughness of a steel ball, which comprises a base (1), a steel ball adjusting device (2), a swing adjusting device (3), a measuring mandrel (4), a limiting device (6), a photoelectric sensor (7), a swing receiving device (8), a laser tube, a laser tube adjusting device (9) and a shell (10). In the non-contact laser detecting instrument provided by the invention, a laser speckle principle is adopted on a measuring principle; the mechanical structure of the detecting instrument has the key points that the incidence speckle of the laser tube, the top end of the steel ball and the gyration center of the sensor adjusting device are adjusted to one point, i.e. three points are on the same line; simultaneously, the reflected speckles are right positioned in the right center of a photonuclear sensor; and the whole light path is in a good darkroom protection mode, and errors are reduced to the minimum under the condition that the whole light path is in the good darkroom protection mode, thereby reaching measurement standards. The non-contact laser detecting instrument provided by the invention has the advantages of high measuring speed, no damage to the measured steel ball (5), simplified structure of the detecting instrument, cost reduction, appearance improvement, simple and convenient operation and strong detection reliability.

Apparatus and methods are described for laser ablation of tissue. The apparatus and methods utilize a laser source coupled to a fiberoptic laser delivery device and a laser driver and control system with features for protection of the laser delivery device, the patient, the operator and other components of the laser treatment system. Advantageously, the laser source may utilize laser diodes operating at approximately 975 nm, 1470 nm, 1535 nm or 1870 nm wavelengths with a laser power output of at least 60 watts, preferably greater than 80 watts and most preferably 120-150 watts or higher. The invention, which has broad medical and industrial applications, is described in relation to a method for treatment of benign prostatic hyperplasia (BPH) by contact laser ablation of the prostate (C-LAP).