17results about How to "Avoid Calibration Errors" patented technology

The invention relates to a calibration device for a zero positioning measuring instrument of a numerical control machine tool cutter. A guide rail is fixed on a base through a bolt; the measuring instrument clamping and positioning device is fixed on the base through a V-shaped seat; the grating movement measuring mechanism is fixed on the base through a bolt; a hand wheel 16 is connected to the reading head through a lead screw; the reading head is connected to the disc-shaped measuring head through a measuring rod; the reading head is connected with the photoelectric receiver through a cable c; the photoelectric receiver is connected with the data processor through a cable a; and the data processor is connected with the display screen through a cable b. The zero positioning measuring instrument clamping and positioning device is composed of a pressure spring, a positioning head and a V-shaped seat, and after the measuring instrument is inserted into the measuring instrument clamping and positioning device, the positioning head automatically locks and positions the measuring instrument under the action of the pressure spring. The method is suitable for calibrating various numerical control machine tool cutter zero positioning measuring instruments. The device is high in calibration precision, easy to operate, high in efficiency, economical and practical.

The invention provides a carbon fiber prepreg paving real-time positioning calibration method and system. The method comprises the following steps: acquiring paving process parameters which influence the optical characteristics of the surface of a prepreg strip; collecting visual information of the edge of the prepreg strip, and extracting visual characteristics reflecting the optical characteristics of the surface of the prepreg strip from the visual information; presetting an association relationship between the paving process parameters and the visual features; receiving a visual measurement result indicating that the paving position of the prepreg strip has deviation; according to the paving process parameters, the visual features and the incidence relation, the source of paving position deviation is judged; and executing calibration or compensation operation according to the judgment result of the deviation source. According to the invention, invalid calibration or accumulative errors caused by misjudgment can be avoided.

The embodiment of the present application provides a method for self-calibration measurement of boric acid solution concentration spectrum using Raman spectroscopy. The method includes the following steps: obtaining a Raman spectrum of a solution at a specific concentration containing a Raman characteristic peak of a calibration object as a standard spectrum, wherein the calibration object is arranged in the optical path of the Raman spectroscopy system, and the calibration object is not in the solution to be tested; obtaining the original Raman measurement spectrum of the solution to be tested; based on the standard spectrum, obtaining the Raman scattered light intensity within a preset range around the characteristic peak position of the calibration object; calibrating the original Raman measurement spectrum based on the Raman scattered light intensity to obtain a Raman calibration spectrum; and obtaining the concentration of the solution to be tested based on the Raman calibration spectrum. Based on the method provided in the present application, the accuracy of the spectrum calibration can be improved, thereby further improving the accuracy of solution concentration detection.

The invention provides an initial visual guidance position correction method and system for workpiece grabbing. The initial visual guidance position correction method comprises the steps that firstly, internal parameters of a camera are calibrated, and a space geometric model with three-dimensional coordinates is established; a plurality of workpiece images are collected, and workpieces in the images are marked through the rectangular target detection frame; training a target detection model based on a deep learning method based on the marked data, and obtaining a target detection frame of the workpiece in the scene and a coordinate position of the center of the workpiece; the target position is converted into a three-dimensional coordinate position according to internal and external parameters of the mechanical arm and the camera, and finally the three-dimensional coordinate position is converted into a final guide coordinate; by means of the target detection method based on deep learning, efficient and high-precision positioning of the workpiece can be achieved, high robustness is achieved, other pose estimation devices can be connected after positioning through accurate positioning of the device, and the pose recognition accuracy is improved.

The invention discloses a circuit breaker tripping assembly instantaneous time-delay characteristic verification device and method, and the device comprises a rack, a tripping device verification tool and a controller, the rack is provided with a verification station, the two ends of the verification station are provided with a first power-on assembly and a second power-on assembly respectively, the verification station is provided with a moving track, and the moving track is provided with a first power-on device and a second power-on device. The release verification tool is movably connected to the moving track. A copper bar and a handle mechanism are arranged on the release verification tool, one end of the copper bar is narrowed to form a sleeving part for loading the release assembly, the other end of the copper bar is a loading part, a current supplementing assembly is arranged on one side of the first power-on assembly, and when the release assembly is verified, the first power-on assembly is electrically connected with the sleeving part through the current supplementing assembly; the second power-on assembly is electrically connected with the loading part, and the handle mechanism is in linkage connection with the tripping assembly. According to the invention, the verification efficiency of the instantaneous time-delay characteristic of the tripping assembly is improved, unnecessary wear of the circuit breaker before leaving a factory is reduced, and the overall service life of the circuit breaker is prolonged.

The present application relates to gas detection analysis technical field, especially to a kind of three-electrode oxygen probe's automatic calibration method.Content includes: construct closed calibration box, and the output voltage of standard oxygen concentration and the probe to be calibrated is synchronously collected;Based on standard oxygen concentration variation, construct atmosphere evolution state quantity, combine the output voltage of the probe to be calibrated, calculate electrode response trajectory quantity;Atmosphere evolution state quantity and electrode response trajectory quantity are fused, and relative response characteristic quantity is constructed, combined with the nonlinear response of the probe to be calibrated in different oxygen concentration range and zero drift, dynamic calibration model is constructed, and the oxygen concentration output result after calibration is obtained, and the parameter in dynamic calibration model is iterated and updated, and calibration parameter is obtained.The three-electrode oxygen probe calibration method does not consider gas dynamic diffusion and probe response delay, and lacks effective compensation for nonlinearity and zero drift, which leads to insufficient detection accuracy.

The utility model discloses a positioning mechanism, double position automatic exchange workstation and three -axis machine tool integrated formula electric arc additive manufacturing equipment belongs to metal additive manufacturing technical field. A kind of positioning mechanism, comprising: bottom plate (31) is provided with zero point positioning mechanism (25), the circumferential of zero point positioning mechanism (25) is evenly distributed with several guide posts (32), the upper surface of zero point positioning mechanism (25) is connected with the compression plate (33) for forming interlocking structure with fixture base plate;The lower surface of fixture base plate is connected with two auxiliary plates (34), the lower surface of auxiliary plate (34) is provided with pin sleeve, the upper surface of bottom plate (31) is provided with the pin (35) for with pin sleeve adaptation. The utility model further discloses double position automatic exchange workstation and three -axis machine tool integrated formula electric arc additive manufacturing equipment containing above-mentioned positioning mechanism. The utility model realizes the deep integration of additive system and three -axis machine tool, solves the problem of low precision of external device, debugging difficulty.

The invention relates to the technical field of image data processing, and particularly discloses a heart CT image geometric calibration method and system based on machine learning, and the method comprises the steps: obtaining a to-be-calibrated heart CT image in an atrial contraction period, obtaining a basic information data set of an object corresponding to the to-be-calibrated heart CT image, and obtaining a basic information data set of the object corresponding to the to-be-calibrated heart CT image; comparing to obtain a geometric calibration defined feature range of the cardiac CT image in the systolic period, importing the obtained position feature value of the to-be-calibrated cardiac CT image, the scale feature value of the to-be-calibrated cardiac CT image and the form feature value of the to-be-calibrated cardiac CT image into a geometric calibration model of the cardiac CT image, and combining the geometric calibration defined feature range of the cardiac CT image in the systolic period to obtain a geometric calibration result of the to-be-calibrated cardiac CT image. According to the heart CT image geometric calibration method, the problems that a traditional geometric calibration method often depends on manual marking or a simple mathematical model, calibration is not comprehensive enough and precision is not high are solved, geometric calibration requirements can be rapidly determined, and working efficiency is improved.

The application discloses an image measuring instrument, and relates to the technical field of visual detection.The image measuring instrument comprises an imaging device, a lens and a light source device.The light source device is used for irradiating a measured object and comprises a light splitting prism, a rotating driving mechanism, a first light source assembly and a second light source assembly.The rotating driving mechanism can drive the light splitting prism to rotate, the angle of the light splitting prism is adjusted, the reflecting surface of the light splitting prism is positioned opposite the first light source assembly or the second light source assembly, parallel light is output when the reflecting surface of the light splitting prism is positioned opposite the first light source assembly, and diffused light is output when the reflecting surface of the light splitting prism is positioned opposite the second light source assembly.The scheme can realize non-disassembly switching of the light source, the quick switching of the parallel light and the diffused light can be completed only by rotating the light splitting prism, the operation process is simplified, the light path calibration error caused by frequent disassembly and assembly is avoided, and the consistency of the measurement reference before and after the switching of the light source is ensured.

This invention relates to the field of standard reference material development and evaluation technology, and discloses a precision-based method for controlling and evaluating the uncertainty of calibration standard reference materials. This method effectively guides the design, control, and evaluation of the uncertainty of calibration standard reference materials, promotes the quality improvement and upgrading of standard reference material development, and provides a scientific basis for users to select suitable calibration materials. This invention uses the inherent precision of the measurement method as the core quantitative basis, constructing a complete technical system of "forward design control at the development end - reverse application evaluation at the user end." By establishing a quantitative constraint relationship between the uncertainty of calibration standard reference materials and the uncertainty of the measurement method, the development of calibration standard reference materials is upgraded from empirical judgment to quantitative science. Simultaneously, it provides users with a quantitative basis for selection and evaluation, achieving a precise match between the uncertainty of calibration standard reference materials and the measurement method.

The utility model relates to a suction resistance automatic calibration device for a filter stick cigarette comprehensive test board, which comprises a self-calibration mechanism, a measuring cylinder, a filtering device, a negative pressure generator, a precise differential pressure sensor and a measuring loop control system, the self-calibration mechanism is composed of a built-in calibration rod shell, a built-in pipe sleeve, an extension pipe, an O-shaped sealing ring, a balance pipeline, a negative pressure pipeline and a measurement pipeline, a standard rod can be placed in the built-in pipe sleeve, the initial position of the measurement cylinder is automatically calibrated through the self-calibration mechanism, timing automatic calibration under the non-stop condition is achieved, operation is easy and convenient, and the measurement precision is high. The detection precision effectiveness of the instrument draw resistance measurement module is ensured, the accuracy and the stability of online detection data of a product are further ensured, the influence of human factors on a measurement result is eliminated, and the measurement precision is improved.

This invention relates to the field of communication technology, and in particular to an industry-specific SMS sending and verification method for preventing spam messages. The method includes: an operator providing a template application platform and dedicated accounts to enterprises holding fixed industry SMS access numbers; after logging in, enterprises submit SMS template applications with variable content annotations; upon approval, they receive a two-digit template number, which, along with the access number, template number, and annotated content, is stored in the industry SMS gateway's storage medium; the enterprise constructs a receiving request using the target mobile number as the receiving address, appending the two-digit template number, the variable content annotations, and the sending end using the access number; the gateway receives the request, intercepts key information, retrieves the corresponding template, removes both curly braces and internal characters, and compares the results; if they match, the SMS is sent; otherwise, it is rejected and a content mismatch message is returned. This invention achieves source control of spam messages and strengthens compliance to improve governance efficiency through template approval and storage, standardized request verification, interception of violations, and code-based log storage.

The invention discloses a device for calibrating a thermal resistor or a bimetallic thermometer in a steel plant, comprising: a shell, a heating device, which is located at the bottom of a hollow cavity of the shell, a heat-insulating sealing plate, which is located at the upper end of the hollow cavity, a measuring hole is provided on the heat-insulating sealing plate, a measuring cover, which is located above the heat-insulating sealing plate and covers the measuring hole, a plurality of insertion holes are provided on the measuring cover, an insertion tube, which is a tube body with an upper end opening, each insertion tube is used for inserting a thermal resistor or a bimetallic thermometer to be calibrated, so that the thermal resistor or the bimetallic thermometer to be calibrated can be compared with a standard part after being heated, and a support member, which is located beside the insertion tube and on the measuring cover, whose inner wall is in contact with the outer wall of the insertion tube, and assists and keeps the lower end of the insertion tube in a constant temperature solution and does not touch the bottom of the shell; the invention has a simple structure, greatly reduces labor costs, ensures that the lower ends of the thermal resistor to be tested and the standard thermal resistor are on the same horizontal plane, and avoids the occurrence of calibration errors.

The application provides a temperature probe frequency response calibration device and method of fast displacement step excitation, the device comprises an experimental section, a calibrated temperature probe, a baffle, a fast displacement mechanism and a photoelectric sensor, the experimental section has stable flow conditions inside, the sensing part of the calibrated temperature probe is arranged in the core area of the experimental section, the movement speed, position and photoelectric sensor signal feedback of the baffle are accurately controlled, the controllability of the heat excitation input time and the accuracy of the heat excitation area are realized. Through the shielding and releasing of the baffle, instantaneous step heat excitation can be generated in millisecond time, the amplitude normalization processing of the output response curve of the calibrated temperature probe is carried out, the dynamic response parameters of the calibrated temperature probe are effectively distinguished, the accuracy of the calibration result is ensured, and the device is suitable for temperature probe frequency response calibration in unsteady flow field measurement.

The utility model relates to temperature instrument calibration technical field discloses a temperature instrument calibration device, including the shell, the detection piece is inserted in the shell inner chamber, be equipped with the calibration subassembly in the detection piece inner chamber. Through the heating rod, the medium in the detection piece is heated to constant temperature, preheats to U -shaped tube, when the temperature that second temperature sensor and first temperature sensor monitored is same, starts first extraction pump, and the medium in the detection piece enters into U -shaped tube through first extraction pipe, and the temperature of the medium in U -shaped tube is transferred to the upper end of metal heat conduction stick, after a period of heat transfer, the temperature of metal heat conduction stick keeps constant, can close and install the to be measured instrument of calibration to the upper end of metal heat conduction stick, in the process of calibrating the to be measured instrument, the medium temperature in detection device keeps constant, thereby can avoid the error of temperature change to calibration operation.

The present invention relates to the technical field of image data processing, and specifically discloses a method and system for geometric calibration of cardiac CT images based on machine learning. The method comprises: obtaining a cardiac CT image to be calibrated during atrial contraction, obtaining a basic information data set of an object corresponding to the cardiac CT image to be calibrated, comparing and obtaining a defined characteristic range of geometric calibration of the cardiac CT image during contraction, importing the acquired position characteristic values ​​of the cardiac CT image to be calibrated, the scale characteristic values ​​of the cardiac CT image to be calibrated, and the morphological characteristic values ​​of the cardiac CT image to be calibrated into a geometric calibration model of the cardiac CT image, combining the defined characteristic range of geometric calibration of the cardiac CT image during contraction, and comparing and obtaining a geometric calibration scheme of the cardiac CT image that needs to be geometrically calibrated. The present invention solves the problem that traditional geometric calibration methods often rely on manual marking or simple mathematical models, and the calibration is not comprehensive enough and the accuracy is not high, and is helpful to quickly determine geometric calibration requirements and improve work efficiency.