55results about How to "Avoid recalibration" patented technology

The invention provides an endoscope system with an anti-interference capacity and a surgical navigation function. A surgical navigation subsystem is realized by an inertial navigation module, and the inertial navigation module comprises three sensors, i.e., a triaxial accelerometer, a triaxial gyroscope and a triaxial magnetometer. Depending on a micro-electro-mechanical system technique, the navigation subsystem can be integrated in a handle of an endoscope, so that the endoscope has a positioning function. In a positioning algorithm, through proper anti-interference treatment, positioning errors caused by external magnetic fields and movement of the endoscope are reduced, and the positioning stability and accuracy are improved.

The present invention relates to a method of determining a constituent of a sample and more specifically, to a method of correcting an absorbance value for a spectrometer. The method is especially applicable in connection with spectrometric analysis instruments for quantitatively determining the chemical composition of fluids, e.g. the content of fat, protein lactose or urea, in food products, especially in raw milk or dairy products. The method is based upon a measurement of one or more selected ranges of a spectrum, providing an absorption spectrum of the product. The method may be applicable in connection with all spectroscopic instruments giving rise to specific ranges of a spectrum, such as UV, VIS, NIR, IR, NMR, MS, etc.). Typically, the spectrum will be a MID-IR absorption spectrum.

The invention provides a fluorescent oxygen probe which includes polymer microspheres copolymerized with a reference probe compound, and a fluorescent oxygen probe compound uniformly dispersed in thepolymer microspheres copolymerized with the reference probe compound. The invention also provides a method for creatively preparing the fluorescent oxygen probe. By copolymerizing the reference probecompound and a polymerized monomer, the microspheres dispersed with the fluorescent oxygen probe compound are prepared and can be used as a fluorescent oxygen probe for use. The prepared fluorescent oxygen probe has a self reference effect, and the problem that a fluorescent probe needs to be recalibrated when a detection device is replaced in traditional fluorescence detection is avoided. In addition, the fluorescent oxygen probe has no high requirements on a detection environment and can be used for detecting the concentration of dissolved oxygen in a dynamic biological environment, such asa water body containing microorganisms, and the error of the detection result is less than or equal to 5% compared with that of a traditional electrochemical detection equipment.

The invention discloses a method and system of planning of synergic movement of endoscopic operation of a line-driven continuous robot. The method comprises the steps that a continuous mechanical armof the line-driven continuous robot is obtained; the continuous mechanical arm is divided into a first virtual mechanical arm and a second virtual mechanical arm; an operation space preset movement path and a joint space preset movement path are acquired; a joint space differential movement rule of the first virtual mechanical arm under the condition of the operation space preset movement path anda joint space differential movement rule of the second virtual mechanical arm under the condition of the joint space preset movement path are calculated; and a differential movement rule of the wholecontinuous mechanical arm in the configuration space is calculated and used for achieving the synergic movement of the endoscopic operation of the line-driven continuous robot. By the adoption of themethod and system of planning of the synergic movement of the endoscopic operation of the line-driven continuous robot, planning of the synergic movement can be conducted in the operation space and the configuration space at the same time, the accidental contact or collision caused by configuration drifting can be avoided, the safety is high, and the working efficiency is high.

The invention discloses a driver feature point measuring device based on binocular vision, capable of detecting the running condition of an automobile and the characteristics of a driver, and changingthe position relation of the camera relative to the driver by adjusting the length of an output shaft of a motor and the rotation angle of a camera. The invention further provides a control method for driver feature point measuring based on binocular vision, and the positions of the two cameras and the length of the output shaft of the motor can be regulated and controlled on the basis of a BP neural network, so that the measuring precision and accuracy can be improved.

The invention discloses an X-ray imaging method with an automatic correction function. The method includes that first, the point light source of an X-ray source directly irradiates to a flat panel detector, and the flat panel detector receives image signals; second, the image signals are amplified through a signal amplifier and then enter into an automatic correction unit for correction, the relation between an output signal I (x, y) and an output signal I0 (x, y) of the automatic correction unit is that I (x, y) =G0(x, y)* S (x, y)* I0 (x, y), wherein the (x, y) is an image space coordinate, G0(x, y) is a sensitivity correction function of a detector, and S (x, y) is a system automatic correction function; and at last, corrected images are processed by a digital image processing unit and then output. According to the imaging system, under a changing condition, without the need for repeated correction, an optimal image can still be developed.

Techniques are provided which may be implemented using various methods and/or apparatuses in a mobile device to provide cradle insensitive inertial navigation. An example method for determining alignment changes between a first body frame and a second body frame according to the disclosure includes obtaining one or more images from an image capture device associated with the first body frame in response to detecting a change in alignment between the first body frame and the second body frame, determining a compensation information based on an analysis of the one or more images, and determininga position based on one or more inertial sensors and the compensation information.

The invention discloses a method, a device, a system, a lower computer and a stirring station for weighing. The method includes the steps of determining a division value in scale calibration data according to the estimated weight of a to-be-weighed article and a weighing range of a scale; calculating scale calibration data parameter according to the division value; and calculating the weight value of the to-be-weighed article according to the scale calibration data parameter. The method disclosed by the invention can avoid repeated scale calibration during the weighing process of the article, is time-saving and labor-saving, and can improve the measuring accuracy of the scale as much as possible on the premise of satisfying the metering range.

The invention relates to a machining process for a through hole in an angular combination device, in particular to a machining method for a through hole in an angular combination device. A machining clamp for the through hole in the angular combination device is adopted, and machining of the through hole in the angular combination device is achieved on a high-speed milling machine; a first combination part is positioned and clamped through an axial pressing bolt, an end face positioning block, a lateral pressing bolt and a lateral positioning block, and a through hole in the combination part is machined; and an axial positioning bolt is loosened, a second combination part is in inserted, angular combination is achieved, the pressing bolt is screwed, a tool is switched, a high-speed micro cutting milling method is adopted, and a through hole in the second combination part is machined. By means of the method, matching errors produced by through hole separated machining are well avoided,influences produced by different material cutting on a tool are avoided, the cutting movement phenomenon is reduced fundamentally, and the through hole machining quality is effectively improved.

The invention discloses a precision sliding table for multi-workpiece parallel vision measurement. The precision sliding table comprises a portal frame vision acquisition mechanism 100, a carrying plate 200, a driving radial lead screw and nut mechanism 300, a fixing plate 400, a driving axial lead screw and nut mechanism 500, a driven axial sliding block mechanism 600 and a driven radial slidingblock mechanism 700; a portal frame and an acquisition camera are fixedly connected so as to form the portal frame visual acquisition mechanism 100; the loading plate 200 clamps a workpiece to finishprecise movement in an axial direction, a radial direction and a circumferential direction through the cooperative work of the driving axial lead screw and nut mechanism 500, the driving radial lead screw and nut mechanism 300, the driven axial sliding block mechanism 600 and the driven radial sliding block mechanism 700, so that the high-precision measurement and reconstruction of the workpiece are achieved. Driving motors on the lead screw and nut mechanisms achieve automatic control precision rotation through communication between an upper computer and a lower computer; hand wheels are arranged, so that manual adjustment is facilitated, and therefore, the adaptability of the precision sliding table to a working environment is good; the fixing plate 400 is provided with a proximity switch sensor and a limiting switch and used for feeding back the operation position of the workpiece in real time and achieving the self-protection of the device during work faults; and the carrying plate200 of the precision sliding table can clamp a plurality of workpieces simultaneously. The precision sliding table meets the task requirements of various visual acquisition modes including monocularvision measurement, binocular vision measurement and structured light measurement; and the precision sliding table has the advantages of high adaptability, high automation degree, and high practicability in the field of machine vision measurement.

According to an endoscope augmented reality error compensation method and device, the AR fusion precision is remarkably improved, a camera pose error caused by rotation of an endoscope tube can be accurately compensated, an AR fusion error of the system is kept at a low level, recalibration of an endoscope camera is avoided through application of a compensation model, and the sensitivity to system positioning noise and corner recognition noise in an image is high. The method comprises the following steps: (1) obtaining an observation value of the pose of an endoscope camera through endoscope calibration and external tracking; (2) calculating an optimal camera pose compensation matrix in the current operation space by using a least square method by combining the observation value and the estimation value of the pose of the endoscope camera;.

The invention relates to the technical field of cutting devices, in particular to a multi-directional adjustable knife changing mechanism of a dividing and cutting machine. The dividing and cutting machine comprises a beam, two wall boards, an annular dividing and cutting knife and a knife changing mechanism, the knife changing mechanism comprises a support arm and a support platform, the support arm is a U-shaped groove with flat bottom, the support platform is mounted in the U-shaped groove and higher than the groove, a lifting mechanism for lifting the support platform is mounted at the bottom of the U-shaped groove, and a translation mechanism capable of regulating the support platform in the horizontal direction is mounted at the side wall of the U-shaped groove. The multi-directional adjustable knife changing mechanism of the dividing and cutting machine is capable of enabling the support platform to support a dividing and cutting roller firstly through regulating the lifting mechanism; the whole knife changing process is easy to operate, the user does not need to demount the whole dividing and cutting roller to change the knife, the re-correction for the dividing and cutting roller is avoided, the structure is simple, the use is facilitated, and the changing efficiency is high.

The invention relates to a carding machine (100) having a device for detecting interfering particles, in particular waste parts, agglomerates, crumbs, slubs and/or impurities in a carded fibrous web (16), said device comprising at least one sensor (30) arranged in a web guide element (20), wherein the web guide element (20) is arranged in the transition of the doffer (5) to the stripping roller (6), and wherein the at least one sensor (30) detects the fibrous web (16) on the doffer (5).

The invention provides a tool positioning device for woodworking machining, and relates to the technical field of woodworking machining, the tool positioning device comprises a rotary working disc, a bearing frame and a tool positioning box, the rotary working disc is arranged above the bearing frame, a center control end is arranged at the top of the rotary working disc, and the center control end is fixedly connected with the top of the rotary working disc; a placing hole is formed in the outer side of the center control end, and an induction lamp is arranged at the top of the outer end of the rotary working disc. In order to perform different processing on woodworking materials, different cutters are stored according to processing requirements by rotating a plurality of groups of placing holes in a working disc, the cutters are driven by a telescopic cylinder device to enter a cutter positioning box, the directions of the cutters are controlled to process wood, and the wood is processed by the movement of a transmission crawler belt and the movement of an adjusting chassis. The whole device can be close to machine tool parts conveniently, machining flexibility is improved, and different cutters are called for machining through rotation of the rotary working disc in order to meet different machining procedures.

The invention discloses a sugarcane harvester rearview mirror system, which comprises a rearview mirror body, a rearview mirror protection device, a mirror rod, a connecting piece and a mounting seat, and is characterized in that the rearview mirror body comprises a rectangular butt joint frame, a frame type limiting check ring, a rearview mirror, a rectangular abutting plate and a rectangular butt joint plate; the rearview mirror protection device comprises a frame type clamping ring, an isosceles trapezoid cover shell and a rectangular fixing block, the rectangular fixing block is connected with the mirror rod through a universal ball head, and the connecting piece comprises a second butt-joint disc fixed to the first butt-joint disc in a threaded connection mode, a first special-shaped positioning rod with an inverted-T-shaped groove and a second special-shaped positioning rod with an inverted-T-shaped groove. The mounting base comprises two inverted-T-shaped inserting blocks, a connecting block, a rectangular vertical plate and an inverted-T-shaped fixing block. The universal ball head is additionally arranged between the mirror rod and the rearview mirror, an operator can flexibly adjust the rearview mirror according to the operation condition, the visual angle of the operator is clear, observation is convenient, and the protective device is additionally arranged on the periphery of the rearview mirror, so that the mirror surface can be effectively prevented from being scraped and collided by the outside.