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1261 results about "Scanner" patented technology

A scanner (also referred to a police scanner, police scanner radio or radio scanner) is a radio receiver that can automatically tune, or scan, two or more discrete frequencies, stopping when it finds a signal on one of them and then continuing to scan other frequencies when the initial transmission ceases.

Method and apparatus for encoding and decoding bar codes with primary and secondary information and method of using such bar codes

A bar code (10) has primary information (46, 48, 50, 51) encoded in one direction (e.g., horizontally) and secondary information (13, 21, 36) encoded in another direction (e.g., vertically) in single (11) or multiple tracks (35) in selected ones of the vertical bars (11) of a bar code (10). Using a non-linear, variable amplitude scanner, all of the bars are scanned in the one direction to obtain all of the primary information and all of those vertical bars having secondary information are scanned in the other direction to obtain all of the secondary information. The one direction which is perpendicular to the vertical bars (11), is determined by first rotating the scan path axis (86, 87) until both start (46) and end (48) code bars are read thereby placing the scan path entirely within the total bar code, and, then, further rotating the scan path (88, 89) to determine the direction of the minimum crossing width (Lsc 80) of the total bar code (10). Secondary information is scanned in planes orthogonal to the one direction after those vertical bars (11) having such information are first identified and selected. In a preferred embodiment, the decoded secondary information may be used to control selected station process operations for selected products in a continuous manufacturing assembly line.
Owner:LEMELSON MEDICAL EDUCATION & RES FOUND PARTNERSHIP

Method for measuring volume of large irregular bulk grain pile based on dynamic three-dimensional laser scanning

InactiveCN102721367AHigh precisionAccurate point cloud dataUsing optical meansScannerPoint cloud
The invention relates to a method for measuring the volume of a large irregular bulk grain pile based on dynamic three-dimensional laser scanning. The method comprises the following steps of: arranging a guide rail in the middle of the top of a barn along the width direction, wherein the guide rail is provided with a slide block controlled by a stepping motor, and a laser radar scanner is installed on the slide block; moving the slide block from one end to the other end of the top of the barn at a constant speed to drive the laser radar scanner by the slide block to finish scanning on the surface of the whole bulk grain pile, wherein the laser radar device is a one-dimensional scanning device to realize linear scanning and returning coordinate data, and the master control computer is used for transmitting pulses to the stepping motor and processing the signal; acquiring point cloud data of the surface of the bulk grain pile through the master control computer, determining the distribution density of scanned points for calculating the volume according to an allowed error value of the grain pile measured by the user, and calculating the weight of the grain pile according to the grain density provided by the user; and generating a point cloud graphic matrix attached with coordinates through scanning space morphology by guide rail moving type three-dimensional laser, performing surface fitting to form an irregular bulk grain pile appearance, and thus obtaining the volume of the irregular bulk grain pile. The volume of the large irregular bulk grain pile can be rapidly and effectively measured at high precision, and remote monitoring can be realized; and moreover, the method is low in cost and easy to implement.
Owner:MENG FAN'GANG

System and method for fast precise measurement and total factor data acquisition of high speed railway

The invention relates to the field of precise railway measurement, high speed railway rail detection and security and digital railway, in particular to a system and a method for carrying out movable precise measurement of the high speed railway and synchronously obtaining total factor data along the line of the railway on the basis of GPS (Global Positioning System) / IMU (Inertia Measurement Unit) positioning and orientation, laser scan and digital imaging technologies. The invention further relates to a special railway measurement mark. The system consists of a laser scanner (1), a digital imaging device (2), a GPS receiver (3), an IMU (4), an industrial computer (5) and a power supply unit (6), and the system can obtain three-dimensional point clouds of rail, roadbed and peripheral environment of the high speed railway and digital images oriented by the earth. The method comprises a method for carrying out movable precise measurement movable precise measurement of the high speed railway and a method for improving the measurement precision by carrying out the simultaneous adjustment with a control point of a rail control network (such as a CPIII foundation pile control network). The system has high integration degree and has the characteristics of high efficiency and high precision, and the precision of the data can reach millimeter level.
Owner:扬州德可达科技有限公司

Method for forecasting real-time measurement of spatial geometrical information of coal rock dynamic disaster

The invention relates to a method for forecasting the real-time measurement of spatial geometrical information of a coal rock dynamic disaster, comprising the following steps of: regarding a tunnel or a working surface as an early warning centre, and dividing a monitoring region into different early warning units; carrying out real-time measurement on the early warning unit through a laser three-dimensional scanner to obtain deformation error of the coal rock spatial geometrical information in the early warning unit; transmitting the measurement values of all the early warning units to a computer center and displaying in the graphic form; judging as a high stress danger unit when the measured deformation error is more than the early warning critical value; judging as a high stress increasing unit when the deformation error increasing ratio in the time is more than the critical increasing ratio; and judging as a high stress gradient unit when two or more adjacent early warning units are increased or reduced sharply. The district that the disaster is possible to take place is analyzed according to the early warnings under different situations, much more time is provided so that an operator can withdraw and take necessary measures, and a convenient way is provided for accurately forecasting the coal rock dynamic disaster.
Owner:CHINA UNIV OF MINING & TECH

Pile driving barge and posture adjustment, positioning control and pile driving methods thereof

A pile driving barge comprises a barge body, buoyancy adjusting devices are arranged at four corners of the barge body respectively, an upper scanner and a lower scanner for scanning vertical piles are arranged on the barge body, and GPS signal receivers are arranged at two different positions of the barge body; anchor machines for anchoring at least four different positions are arranged on the barge body; a pile frame is rotationally arranged on the barge body; the barge body is provided with an automatic pile frame lying device; a piling guide rail is arranged on the pile frame; a pile hammer is movably arranged on the pile driving guide rail; a first brake device for limiting the position of the pile hammer on the pile driving guide rail is arranged on the pile hammer, a transition roller is arranged on the upper portion of the pile frame, the upper portion of the pile hammer is connected with a winch arranged on the barge body through a steel wire rope, and a second brake device for braking by braking a winch roller to control the steel wire rope to pull the pile hammer is arranged on the barge body; and a pile cap is arranged on the pile hammer, a pile gripper for gripping thevertical pile is arranged on the lower portion of the pile frame. The invention further discloses a posture adjusting method, a positioning control method and a pile driving method of the pile driving barge.
Owner:JIANGSU UNIV OF SCI & TECH +1

Loop control method for wire tandem rolling and device

The invention discloses a method and a device for controlling a movable sleeve for the continuous rolling of a wire material. The method comprises: a guide wheel positioned between two adjacent rolling machines conducts the wire material to a rolling machine; a sleeve removing sensor arranged in an outlet of the rolling machine detects a reaching signal in the head of the wire material and emits a sleeve removing command; the sleeve is removed through a sleeve removing auxiliary cylinder; a programmable controller is adopted to adjust the speed of the rolling machine and control the stretching of the sleeve removing auxiliary cylinder for carrying out the sleeve removing according to calculated raising speed curve parameters of the rolling machine; and through a closed-loop PID digital control algorithm, the speed of the rolling machine is adjusted to control the height of the movable sleeve. The device comprises a first rolling machine, a second rolling machine, a movable sleeve scanner, a sleeve removing sensor, an auxiliary cylinder, and guide wheels; the movable sleeve scanner is positioned on the highest point of removing the movable sleeve between the first rolling machine and the second rolling machine; the sleeve removing sensor is arranged in the outlet end of the second rolling machine; the sleeve removing auxiliary cylinder is positioned in the outlet end of the first rolling machine; and the positions between the first rolling machine and the second rolling machine respectively close to the rolling machines are provided with the guide wheels. The device has the characteristics of simple structure, convenient use, and the like.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI

Device and method for the determination of distance by means of light pulses

A device (1) for the determination of distance by means of light pulses is disclosed. The device (1) comprises a light source (2) for emitting light pulses with a specified frequency, a detector (8) for receiving the light pulses emitted and reflected by the light source, and a controller (4) which is in communication with the light source (2) and the detector (8) and which can control said light source and detector by means of signals. The device (1) further comprises at least two timers (Z1, Z2, Z3) which are connected to the controller (4) and the detector (8). Said controller (4) is designed in such a way that when a light pulse is emitted by the light source (2), the controller (4) generates a start signal which triggers the time measurement by each one of the at least two timers, in order, and beginning again from the start. The detector (8) is designed in such a way that upon receiving a reflected light pulse, said detector (8) generates a stop signal which is forwarded to the at least two timers (Z1, Z2, Z3) and which stops the time measurement by the timer of the at least two timers, to which at that instant a measuring window is assigned by the controller (4). The device can preferably be designed as a fiber-optic scanner. In addition, a method for the determination of distance by means of light pulses is disclosed.
Owner:TRIMBLE GERMANY
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