137 results about "Length measurement" patented technology

This disclosure extends to systems, apparatus, and methods related to digital tape measure systems including a digital angle-finder, which are able to record and store or transmit to an external device both a length measurement and an angle measurement. These measurements may be able to be recorded individually or together in one “capture” motion, such as pushing a “record” button. Such a system allows a user to easily record a length of material and an angle indicating where and how the material needs to be cut.In some illustrative embodiments, systems in accordance with the present disclosure utilized units of measurement that are displayed by the digital tape measure in a form that can easily be recorded by hand by simple visual reading of the numbers, while simultaneously allowing measurements from the system to be displayed or recorded by the onboard computer.

The invention relates to the technical field of length measurement, and particularly discloses a length measurement device based on laser interference, which comprises a laser measurement module, an air curtain channel module, an air curtain construction module and a channel adjustment module, the laser measuring module is used for transmitting and receiving laser, the optical path difference change is measured according to the interference principle, and the micro length change of the workpiece can be continuously and accurately measured in real time while the machining module carries out machining operation on the workpiece; a linear channel is formed between the laser head and the measuring reflector through the air curtain channel module, inert gas is continuously introduced into the channel through the air curtain construction module, and an air curtain atmosphere with stable laminar flow is formed, so that pollutants and interference factors such as oil mist, dust, cutting fluid splashing and hot air turbulence generated in a machining area are effectively blocked, and the machining precision is improved. Therefore, the measurement light beam is prevented from being interfered by environmental factors in the propagation process.

A spectroscopic apparatus including an analysis optical system, a length measuring optical system, and a calculation apparatus and performing spectroscopic analysis of a sample, the analysis optical system including a moving mirror having a first reflection surface and a second reflection surface, the moving mirror configured to be translated, a gas cell configured to encapsulate a gas and add a light absorption signal to the analysis light, and a first light receiver configured to receive the analysis light containing a sample derived signal, a first modulation signal, and the light absorption signal, the length measuring optical system including a length measuring optical system configured to acquire a displacement signal corresponding to the position of the moving mirror from laser light reflected off the second reflection surface, the calculation apparatus including a moving mirror position calculator, a light intensity calculator, a Fourier transformer, and a moving mirror position correction section.

The embodiment of the invention provides a light field space coherence length measurement method and system, and relates to the technical field of optical measurement. The method may first obtain a training set and train a measurement model using the training set. And obtaining an interference fringe image through numerical simulation generation or experimental acquisition, and inputting the interference fringe image as an input image into the measurement model so as to output a spatial coherence length prediction value of the input image through the measurement model. Wherein the measurement model is a convolutional neural network model for performing feature extraction by adopting a multi-layer cascaded convolutional pooling structure, and the features can be mapped into a spatial coherence length predicted value through a full connection layer. According to the method, one-step measurement from the original interference image to the coherence length can be realized, a tedious fringe contrast calculation process is avoided, the influence of experimental noise on measurement precision is reduced through depth feature extraction, the whole prediction process can be completed within millisecond-level time, and the measurement efficiency of the light source space coherence length is improved.

The invention discloses a flexible metal material three-dimensional length measurement system based on a rotary camera mechanism, which is used for solving the problems that the existing contact measurement is easy to cause material deformation, the non-contact measurement is poor in adaptability to high-reflection / low-texture materials and the like. Comprising a rotary camera module (an industrial camera collects images at multiple angles along a semicircular guide rail), a visual calibration module (an ArUco code and a photoelectric sensor realize pose calibration and triggering), a texture enhancement module (structured light / random noise projection optimization feature extraction), a three-dimensional reconstruction module (a multi-view three-dimensional reconstruction algorithm generates point cloud) and an error compensation module (an error compensation module). And a material perception weighted least square fitting and neural network dynamic correction error) and a control splicing module. The bending deformation error of the material is eliminated through non-contact three-dimensional measurement; in combination with texture enhancement and error compensation mechanisms, the measurement precision of high-reflection materials such as aluminum foils and stainless steel bands is improved; and a modular integrated design is adopted, and automatic production line deployment is adapted.

An optical device includes: an incident optical system; an analysis optical system; and a length measurement optical system. The incident optical system includes a laser light source, and an incident light dividing element that divides the laser light. The analysis optical system includes a first light dividing element that divides the first divided light and then mixes the light, a first mirror that adds a first modulation signal to the one first divided light by movement and reflection, a second mirror, and a first light receiving element that receives the first divided light including a sample-derived signal and the first modulation signal. The length measurement optical system includes a second light dividing element that divides the second divided light and then mixes the light, an optical feedback unit that feeds back the one second divided light to the second light dividing element, and a second light receiving element that receives the second divided light including a displacement signal generated by the first mirror.

The utility model belongs to the technical field of measurement, and relates to a pipe bar length measuring device, which comprises a bottom frame, a detection platform and a movable measuring mechanism, the upper end face of the detection platform is provided with an opening groove used for containing a to-be-measured pipe bar in the length direction, the detection platform is further provided with a positioning block capable of moving in the length direction of the detection platform, and the lower end of the positioning block is matched with the opening groove. The positioning block has a locking function and is used for preventing the to-be-measured pipe bar from moving along the length direction of the detection platform; during measurement, through the movement of the positioning block and the measuring mechanism, one end of a to-be-measured pipe bar abuts against the positioning block, and the other end of the to-be-measured pipe bar makes contact with a measuring rod of a dial indicator in the measuring mechanism. The measuring device is simple in structure, the position of the measuring head can be fixed without complex operation by moving the measuring mechanism and the positioning block, and length measurement of pipes and bars of different specifications can be achieved.

The invention is suitable for the technical field of wind power generation, and particularly relates to a wind driven generator anomaly detection method and system based on a sensor, and the method comprises the steps: controlling a laser transmitter to transmit detection light rays, receiving reflected light rays, and recognizing the identity of a blade based on the reflected light rays; real-time ranging data is calculated based on the time difference between the emitted light and the reflected light, and the real-time rotating speed of the blade is calculated based on the real-time ranging data and preset parameters of the reflection area; calculating a blade length measurement value based on the distance measurement data pair, constructing a length change curve according to the blade length measurement value, and extracting a blade vibration frequency; and constructing a vibration reference function based on the blade real-time rotating speed and the blade vibration frequency, judging whether the blade is abnormal or not according to the vibration reference function, and generating a judgment result. The accuracy of vibration monitoring is guaranteed through high-frequency sampling, whether the blade is abnormal or not is judged according to the change of the rotating speed and the vibration frequency of the blade, and the stability of detection is guaranteed.

A spectroscopic device includes: an analysis optical system; a length measurement optical system; and a calculation device. The analysis optical system includes a moving mirror and a first light receiving element. The length measurement optical system includes a second light source configured to emit laser light, a gas cell with a gas that absorbs light of a predetermined wavelength sealed therein and configured to cause the laser light to be incident thereon, an emitted light amount detection unit configured to detect an amount of light emitted from the gas cell and output an emitted light amount detection signal, a light source control unit configured to control a wavelength of the laser light based on the emitted light amount detection signal, and a length measurement unit configured to use the laser light to obtain a displacement signal corresponding to a position of the moving mirror, and the calculation device includes a moving mirror position calculation unit, a light intensity calculation unit, and a Fourier transform unit configured to generate a spectral pattern.

The invention relates to the technical field of machine vision, and particularly discloses a length measurement method and system based on machine vision, and the method comprises the steps: collecting the geometric data of a sequence image recognition clamp to form a geometric constraint set, and extracting the candidate edge of the end part of a pole piece; executing constraint deformation regression based on the geometric constraint set to obtain time-varying distortion mapping and generate a geometric correction image; triggering a focal plane perturbation to collect an auxiliary image, calculating a parallax field, solving a local scale factor, and generating a mapping relation from pixels to actual lengths; executing sub-pixel edge fitting in the geometric correction image to obtain pole piece endpoint coordinates; calculating the extension amount of the measured pole piece; according to the method, time-varying distortion is eliminated through online correction of geometric drive of the clamp, depth-related scale change is compensated by using active focal plane perturbation, and the precision problem of length measurement in a cross-medium environment is effectively solved by combining sub-pixel positioning and time sequence processing, and extra calibration equipment is not needed.

The invention relates to the technical field of ship maintenance and nondestructive testing, in particular to a crack length measuring device. A crack length measuring device comprises a shell and a photoelectric measuring part arranged at the bottom end of the shell, a power source is arranged in the shell, and the shell is further provided with a display part used for receiving signals of the photoelectric measuring part and displaying the signals in the form of length signals. The photoelectric measuring part comprises a measuring wheel, a light grid is arranged on the side portion of the measuring wheel, and the photoelectric measuring part further comprises a photoelectric sensor for sensing the light grid. The rotation angle of the measuring wheel can be obtained only by detecting the number of the light grids sequentially passed by the photoelectric sensor, and the path of the measuring wheel, namely the length of the crack, can be obtained according to the diameter and the rotation angle of the measuring wheel, namely, the length of the irregular crack can be measured through a simple structure, and the measurement accuracy is improved. The problems that in the prior art, the measurement error is large when a ruler is adopted for cracks of irregular curves, and the cost is high when high-precision electronic equipment is adopted are solved.

A distance measuring device includes a measuring member holding a length measuring instrument and at least one rail member (base member) on which the measuring member is movably disposed. When a straight line parallel to a direction in which the measuring member disposed on the base member moves is defined as a reference line, an angle formed by a straight line parallel to an axial length direction of a reaction tube and the reference line, which are on an identical plane, is constant for the plurality of reaction tubes disposed side by side along the reference line. A measurement direction of the length measuring instrument is parallel to the axial length direction of the reaction tube in a state where the measuring member is disposed on the base member. The measuring member is disposed on the base member to be able to sequentially move.

The application relates to a laser tracker mirror surface foldover length measurement optical path fast adjusting device and adjusting method. The adjusting device comprises a laser transmitter with a circular arc surface, a spherical diaphragm and a four-degree-of-freedom adjusting frame. The laser transmitter is located at one end point of a measured length and is used for transmitting a laser beam. The spherical diaphragm is located at another end point of the measured length and is used for limiting the laser beam so that the laser beam is parallel to the measured length. The four-degree-of-freedom adjusting mirror frame is located on the extension line of the measured length and is close to the spherical diaphragm, is used for mounting a plane mirror and adjusting the position and posture of the plane mirror, and makes the laser beam pass through the original point of the laser tracker after being reflected by the plane mirror. The adjusting method is to realize optical path fast rough adjustment through reproducing the optical path of the laser tracker mirror surface foldover length measurement and to realize optical path quantitative fine adjustment through calculation.

This invention provides a precise method for measuring the shrinkage of prestressed anchor cables using a through-hole jack tensioning system, belonging to the field of prestressed anchoring engineering technology. The method involves setting fixed marks m and n on the exposed steel strands of the tool anchor plate and working anchor plate, respectively. Using a high-precision length measuring instrument, the corresponding characteristic length data are precisely measured in three tensioning stages: before the installation of the through-hole jack after anchor cable pre-tensioning, after tensioning to the final stage and stabilizing, and after unloading and disassembling the through-hole jack. The shrinkage of the tool anchor plate, the actual elongation of the steel strand, and the shrinkage of the working anchor plate are then calculated using correlation formulas. This invention solves the problems of traditional measurement methods, such as inconsistent measurement points, susceptibility to the condition of the steel strand ends, and incompatibility with high-precision measuring instruments. It also eliminates the unreasonable method of using the groove depth of the limiting plate as a fixed parameter, considers the actual working conditions of the anchor clamp and steel strand matching, and significantly improves the accuracy of shrinkage measurement.

The present application provides a computer program, an information processing method and an information processing device capable of assisting in detection processing related to a prescribed pattern formed on a substrate. The computer program causes a computer to perform detection processing related to a plurality of patterns of a prescribed shape formed on a substrate on one or more captured images obtained by capturing the substrate after being processed by a substrate processing device, and to perform processing of detecting an image area in which an existing pattern is reflected from the captured images, detecting the outline of the pattern in the image area, and detecting a length measurement site for the pattern based on the detection result of the outline. In at least one of the detection processing of the image area, the detection processing of the outline, and the detection processing of the length measurement site, condition information including at least one of coordinate designation, area designation, or text as a detection condition is acquired, and the detection processing related to other patterns is performed based on the condition information acquired with respect to one pattern.

The present invention relates to a spectroscopic apparatus, a calibration method for the spectroscopic apparatus, and a spectroscopic method, the spectroscopic apparatus performing spectroscopic analysis of a sample, the spectroscopic apparatus comprising: an analysis optical system comprising: a moving mirror having a first reflecting surface and a second reflecting surface and being driven in translation; a gas cell in which a gas is sealed and which adds a light absorption signal to the analysis light; and a first light receiving element that receives analysis light including a sample source signal, a first modulation signal, and a light absorption signal, the length measurement optical system being provided with a length measurement unit that acquires a displacement signal corresponding to the position of the moving mirror from the laser light reflected by the second reflection surface. A calculation device is provided with a moving mirror position calculation unit, a light intensity calculation unit, a Fourier transform unit, and a moving mirror position correction unit.

The utility model provides a device for measuring the length and the end face size of a steel pipe, and belongs to the technical field of steel pipe measurement. Comprising supporting frames and a steel pipe supporting table, the supporting frames are arranged at the two ends of a steel pipe, and the steel pipe is placed on the upper surface of the steel pipe supporting table; the support frame at one end is provided with a camera module and a distance measuring module, and the support frame at the other end is provided with a distance measuring module; the supporting frame comprises a stand column support, an optical shaft, a steering connecting block and an adjusting mounting block. The optical axis is fixed to the stand column support to build a supporting frame, and the camera module and the distance measuring module are both connected to the optical axis. According to the structure and arrangement design of the device, end face size measurement and length measurement can be carried out on the steel pipe at the same time, the detection rate can be greatly improved, omission is avoided, and accurate measurement is achieved.

A method for calibrating or characterizing a coordinate positioning machine (1) having a first member (3) movable relative to a second member (2) is disclosed. One or more length measurement devices (51) are coupled in a plurality of different configurations between at least one support (34) attached to the first member (3) and a plurality of supports (24) attached to the second member (2) via a base plate (22). For each of the plurality of different configurations, the machine (1) is controlled to move the first member relative to the second member and collect calibration data. The geometry of the machine (1) is characterized by a set of model parameters, and the calibration data is used to determine a better estimate of at least one model parameter.

The present invention provides a rapid core acoustic wave velocity measurement device and method. This device integrates a length measurement device into the holder of a transmission-based ultrasonic measurement device. This device measures core length simultaneously with the acoustic wave propagation time, combining two separate experimental steps into one. This improves the efficiency and accuracy of core acoustic wave velocity measurements and effectively addresses the issue of length inaccuracy when measuring the acoustic wave velocity of irregular, loose, or fractured cores. Furthermore, an experimental method for analyzing the difference between maximum and minimum horizontal in-situ stresses in rock using radial acoustic wave velocity is proposed.

The application provides a kind of underwater fish length measurement method based on binocular vision and attitude estimation, belongs to image recognition and underwater measurement technical field.The method constructs a new type of cascaded perception measurement framework combined with underwater context attention enhancement module and geometric statistical filtering engine;The framework is based on a top-down target detection and key point positioning cascaded network, introduces an underwater context attention enhancement module at the key point feature fusion end, and introduces a spatial orthogonal circular arc compensation and double-stage time signal filtering mechanism at the three-dimensional object understanding algorithm end, through the collaborative optimization of visual feature topology perception and space-time joint filtering, realizes the accurate capture of fish key points under light and shadow interference, and effectively suppresses the non-rigid swimming deformation and depth noise jump, effectively solves the distortion problem of underwater dynamic length measurement, significantly improves the anti-distortion ability and overall output stability of measurement in underwater dynamic environment.

The utility model aims to provide bamboo batten kicking equipment, which belongs to the field of forestry machinery and is characterized in that the bamboo batten kicking equipment comprises a rack, a length measuring assembly, a detection assembly, a first conveying assembly, a second conveying assembly and a kicking assembly, the length measuring assembly comprises a mounting plate, a guide groove, a first pressing mechanism, an encoder, a roller and a feeding sensor, the detection assembly comprises a first camera, a first light source, a first nozzle, a second camera, a second light source and a second nozzle, the first conveying assembly comprises a motor, a first driving wheel, a first driven wheel, a second pressing mechanism and a discharging sensor, and the second conveying assembly comprises a second driving wheel, a second driven wheel and a third pressing mechanism. The material kicking assembly comprises a material kicking mechanism and a guide plate. According to the device, bamboo battens enter the device from the length measuring assembly, when the bamboo battens pass through the detection assembly, a camera begins to photograph and detect, if the detection result is that the bamboo battens are good, the bamboo battens are continuously conveyed forwards through the first conveying assembly and the second conveying assembly, and if the detection result is that the bamboo battens are defective, the material kicking assembly works to remove the bamboo battens.

The embodiment of the utility model provides a diagonal measuring tool, belongs to the technical field of household appliance measurement, and aims to solve the technical problem of high labor cost of diagonal length measurement in related technologies. The diagonal measuring tool comprises a fixing device which comprises a mounting bracket mounted on a measuring surface of a to-be-measured piece; the positioning assembly comprises a first positioning piece and a second positioning piece, and the first positioning piece and the second positioning piece are located at the first end and the second end of the diagonal line of the to-be-tested piece; the connecting rope penetrates through the mounting bracket in the first direction; the first end and the second end of the connecting rope are respectively connected with the first positioning piece and the second positioning piece; the laser ranging assembly is movably arranged on the mounting bracket; the laser ranging assembly can be fixed to the connecting rope, the measuring direction of the laser ranging assembly is parallel to the extending direction of the connecting rope, and the laser ranging assembly at least can obtain the distance between the first positioning piece and the second positioning piece. The diagonal measuring tool can reduce the labor cost of diagonal length measurement.

The invention discloses a high-precision wire harness length measuring device, and relates to the technical field of wire harness production. The device comprises a shell and a precise measurement assembly, a feeding mechanism is arranged at the bottom of the shell, a cutting mechanism is arranged at the bottom of an inner cavity of the shell, the precise measurement assembly comprises a threaded column, the right side of the threaded column is movably connected with the inner wall of the shell, and the left side of the threaded column penetrates through the shell and is fixedly connected with a friction wheel. According to the invention, through the precise measurement assembly, the cooperation of the threaded column, the friction wheel and the counter, when the electric cylinder drives the threaded sleeve to drive the electric clamping jaw to move, the linear displacement of the wire harness is calculated through the number of rotation turns of the threaded column, so that the optical projection error caused by bending of the wire harness is avoided; meanwhile, the wire harness tightening mechanism applies constant pressure to the wire harness in the measurement process, it is ensured that the wire harness is always kept in a linear state, interference of arc deformation on length measurement is eliminated, and therefore the accuracy and consistency of measurement results are improved.

This invention relates to the field of rebar length measurement, and more particularly to a high-precision length measurement method and system for continuously cast rebar billets. The method includes the following steps: installing an industrial-grade infrared camera system above the output roller conveyor of the production line to continuously acquire images and obtain a raw image stream; preprocessing the raw image stream to obtain an enhanced image stream; determining the end position of the billet based on the enhanced image stream; performing pixel displacement conversion calculation based on the end position of the billet to obtain the real-time length value of the billet; correcting the image measurement motion error of the real-time length value to generate a corrected length value; extracting the target length measurement, and performing real-time rolling tracking of the corrected length value; when the target length measurement is detected to be equal to the standard length measurement, driving the cutting equipment to complete the length measurement. This invention achieves high-precision length measurement and measurement of continuously cast rebar billets, improving the accuracy of length measurement and cutting and increasing production efficiency.

The utility model relates to the technical field of length measurement, and discloses a lifting type laser length measuring device which comprises a conveying frame and a cutting platform fixedly installed at one end of the conveying frame, and supporting blocks are fixedly installed on the two sides of the outer surface of the conveying frame. A fixing plate installed on the conveying frame is fixedly installed at the other end, away from the conveying frame, of the supporting block, and a sliding base is arranged on the portion, away from the conveying frame, of the fixing plate. According to the lifting type laser length measuring device, when the motor is started, the sliding block slides on the sliding rod, so that the limiting block, the extension seat, the measuring instrument body and the infrared probe can be driven to move towards the measuring object body, and the measuring instrument body and the infrared probe measure the measuring object body; the sliding block can drive the measuring instrument body and the infrared probe to carry out accurate displacement control, high-precision measurement of a measured object body can be achieved, the height or thickness of different materials can be measured through the lifting function, and the overall practicability is improved.

This utility model discloses a ground fissure monitoring device, belonging to the technical field of geological exploration equipment. The device includes a first anchor rod, a second anchor rod, a measuring instrument, and a measuring rope. The measuring instrument has a measuring slide, a length measuring scale, a first opening, and a second opening extending into the measuring slide on its outer wall. A measuring slider slides within the measuring slide, and the measuring slider contains a damping element. A measuring pointer is mounted on the measuring slider, extending from the first opening and pointing towards the length measuring scale. The measuring instrument can be fixed to the second anchor rod. One end of the measuring rope connects to the first anchor rod, and the other end passes through the second opening into the measuring slide and connects to the measuring slider. The second anchor rod has a first guide wheel and a second guide wheel, and the measuring instrument has a third guide wheel and a fourth guide wheel. According to this design, geological surveyors only need to periodically read the sliding distance of the measuring slider to directly obtain data on ground fissure changes.

The utility model provides an absolute grating ruler and a length measuring device, and relates to the technical field of optical measurement, the absolute grating ruler comprises a main ruler used in cooperation with a code reader, the code reader moves in the length measuring direction of the main ruler, and the main ruler comprises a plurality of sub-rulers which are arranged in the displacement direction of the code reader at intervals; the auxiliary scale is arranged along the displacement direction of the code reader, the auxiliary scale is provided with at least one first absolute code channel used for positioning the position of a sub-scale corresponding to the code reader, and each sub-scale is provided with at least one incremental code channel used for reflecting the movement distance of the code reader on the sub-scale; and the code reader is used for reading the position of the corresponding sub-scale and the measured moving distance so as to obtain a length measurement result. And the first absolute code channel and the incremental code channel are combined to obtain a high-precision measurement length. And a plurality of sub-scales which are spliced at intervals are adopted, so that the mounting requirement and the requirement on the use environment are reduced, and batch production is facilitated.

This invention relates to the field of stepped hole measurement technology, and in particular to a precision internal step gauge. It mainly includes a dial indicator, an internal step gauge body, a support nut, a support spring, a support screw, and an internal groove probe. This invention primarily utilizes a lever to convert linear movement into pointer rotation, and then uses a scale dial for reading the length measurement instrument. Compared to previous profilometers and three-dimensional coordinate measuring machines, this invention allows for online step measurement, offering convenience, flexibility, and high fabricationability.

The present invention relates to a laser length measurement system based on dynamic cold-detection distance. The system comprises a laser velocity measurement unit, a cold-detection unit that triggers the laser velocity measurement unit, and a data processing unit that communicates with the laser velocity measurement unit. The system also includes a cold-detection unit tracking module. The laser length measurement system based on dynamic cold-detection distance can dynamically configure the spacing between two cold-detection units, achieving high measurement accuracy for both long and short materials, typically achieving a ±2mm error range.

The invention provides a measurement precision transformation and improvement system of a measurement instrument and a use method of the system, and relates to the technical field of measurement. The measuring instrument is arranged in the packaging shell, is a length measuring instrument or a force measuring instrument, and comprises an instrument body and a contact part capable of linearly stretching and retracting relative to the instrument body; the distance conversion assembly is connected to the packaging shell and comprises an access part which is connected to the contact part and can linearly move along the same direction with the contact part; the output part extends from the inside to the outside of the packaging shell and is used for being connected to an object to be measured; and two ends of the switching mechanism are respectively connected to the access part and the output part, and the switching mechanism is used for switching the moving distances of the access part and the output part according to a set proportion. The improved lifting system is simple in structure, measurement exceeding the measurement precision of the measuring instrument can be completed, and the improved lifting system ultimately improves the measurement precision.