21results about How to "Flexible measurement" patented technology

The invention relates to a flexible combined three-dimensional measurement method and device for the overall shape of a large aircraft, and the method comprises the steps: building a base station, and obtaining the spatial pose of a three-dimensional laser scanner; a three-dimensional laser scanner scans and collects local three-dimensional point cloud data of the large aircraft by using a three-dimensional measuring device; performing coarse registration on the acquired local three-dimensional point cloud data by using a coarse registration method based on base station positioning; voxel-based sampling is carried out on the local three-dimensional point cloud data after coarse registration, the overlapping degree between any two point clouds is calculated, and a maximum spanning tree is extracted according to the overlapping degree; a deep learning algorithm, namely a food grazing person, is put forward to carry out fine registration on the obtained maximum spanning tree; and the overlapping degree between any two point clouds is calculated again, a maximum spanning tree is constructed according to the overlapping degree, and refined registration is carried out by using a traditional algorithm ICP. According to the invention, the flexible and intelligent measurement of the data of the whole aircraft is realized, the overall appearance of the large aircraft is efficiently and accurately measured, and the precision requirement of the overall appearance measurement of the large aircraft is met.

The invention relates to the technical field of non-contact current sensing, and discloses a magnetic array current sensing method, system and device considering conductor offset and a medium, and the method comprises the steps: arranging a plurality of magnetic field sensing units around a current-carrying conductor, collecting magnetic field data, and converting the magnetic field data into an analog voltage signal; performing multi-channel sampling on the analog voltage signal through a multi-channel analog-digital sampler, and calculating the magnetic field intensity induced by each magnetic field sensing unit; based on the magnetic field intensity, the position and the inclination angle of the current-carrying conductor are corrected, the influence of geometric offset on a measurement result is compensated, and high-precision non-contact current measurement is realized. Under the condition that the position of the current-carrying conductor deviates or the inclination angle changes, high-accuracy measurement of the current can still be achieved, and through a non-contact measurement mode, the method has the advantages of being flexible, high in precision, high in robustness and the like. And a new method is provided for the accurate and flexible measurement of the current of the current-carrying conductor.

A device and method for detecting the anti-thrust ability of a railing, belonging to the field of railing detection, the device comprises a thrust system, a sensor and an auxiliary claw system, the thrust system is used to generate a positive thrust to the railing to be tested, the thrust system is provided with a sensor, the sensor is used to detect the displacement and thrust generated by the thrust system; the auxiliary claw system is symmetrically connected to both sides of the thrust system, the auxiliary claw system grabs the railing to be tested, and generates a reverse force of the positive thrust under the action of the thrust system; the present invention uses the entire railing as a test object while keeping the railing intact, does not damage the structure of the railing, reduces the time and cost of preparation and repair, and makes the evaluation result more real and reliable.

This utility model discloses a corner-cutting machine for easy positioning of the cutting position, relating to the field of cutting machine technology. It includes: a worktable with stop bars on both sides of its upper surface, the two stop bars being collinearly distributed; symmetrically distributed bevel plates on both sides of the top of the worktable; a pad located inside the gap between the two bevel plates above the worktable; a rotatable angle positioning strip above the bevel plates and the pad, the angle positioning strip being used at least for positioning any cutting angle of the profile; a measuring ruler on the upper surface of the bevel plates and the pad; a cutting disc in the middle of the worktable; and a moving mechanism below the worktable, the moving mechanism being used at least for driving the feed movement of the cutting disc. The stop bars and bevel plates are used to achieve flat-edge cutting and 45-degree angle cutting of the profile, respectively. For profile cutting at any angle, the angle positioning strip is used, enabling cutting at any angle.

The utility model discloses a multifunctional measuring tool for construction, which relates to the technical field of construction engineering and comprises a shell. A measuring tape is arranged in the shell, an L-shaped card is arranged at one end of the measuring tape, a spiral spring used for controlling the measuring tape to be automatically wound is arranged in the shell, a containing groove is formed in one side of the shell, an angle ruler is placed in the containing groove, angle scales are arranged on the outer side of the angle ruler, and a sliding groove is formed in the inner side of the containing groove. A lock catch is slidably connected between the inner walls of the sliding grooves. According to the utility model, by arranging the bevel protractor which moves on the outer side of the shell, when an angle needs to be measured, the lock catch is pressed, so that the lock catch retracts into the sliding groove, the bevel protractor can be taken down for use, the independently arranged bevel protractor can measure the angle more flexibly, and meanwhile, the bevel protractor is fixed through the lock catch, so that the angle measurement is more convenient. The device is very convenient to take and fix, and greatly improves the measurement efficiency and measurement precision of a construction project.

The embodiment of the invention discloses a noise measurement method for an acceleration sensor, and the method comprises the steps: obtaining the reference self-noise power spectrum density of a reference acceleration sensor, collecting the current acceleration data of a to-be-measured acceleration sensor, and the current acceleration data of the reference acceleration sensor, and finally, determining the current self-noise power spectral density of the acceleration sensor to be tested according to the current acceleration data of the acceleration sensor to be tested, the current acceleration data of the reference acceleration sensor and the reference self-noise power spectral density. The current self-noise power spectral density of the acceleration sensor to be measured is determined based on the reference self-noise power spectral density according to the current acceleration data of the acceleration sensor to be measured and the current acceleration data of the reference acceleration sensor, so that the noise of the acceleration sensor to be measured can be measured flexibly, efficiently and accurately. The noise of the acceleration sensor to be measured can be measured flexibly, efficiently and accurately.

The application discloses a kind of reducer gap measuring device and method.Therein, the device includes: workbench, for placing reducer;Fixed component, for fixing reducer on workbench by various fixing methods, wherein different fixing methods are used to fix different expansion sleeve clamps with workbench;Multiple expansion sleeve clamps are respectively connected with spline on input end and spline on output end of reducer;Torque sleeve is installed on the expansion sleeve clamp connected with spline on input end, for torque operation on input end;Multiple measuring devices are respectively placed on multiple expansion sleeve clamps, for measuring the rotation angle of input end and output end under different fixing methods.The application solves the technical problem of large measurement error in related art for measuring the gap of reducer.

The invention relates to the technical field of surveying and mapping devices, and discloses a river terrain detection device for land surveying and mapping, the river terrain detection device comprises a pull frame assembly, separate measurement assemblies, a floating seat and a bottom measurement assembly, the pull frame assembly is fixedly connected to the top of the floating seat, a plurality of separate measurement assemblies are annularly and uniformly arranged on the top of the floating seat, and the separate measurement assemblies are connected with the pull frame assembly through pull ropes; the bottom measuring assembly is connected with the bottom of the floating seat through a pull rope. Each separate measuring assembly comprises a machine body, pull buckles, a power rotating seat, rotating seat telescopic rods, a power rotating shaft and a clamping seat, the pull buckles are symmetrically and fixedly connected to the top of the machine body, the power rotating seat is slidably connected with the side edge of the machine body, the rotating seat telescopic rods are installed on the two sides of the machine body, and the telescopic ends of the rotating seat telescopic rods are connected with the power rotating seat; the power rotating shaft is rotationally connected with the power rotating seat, the clamping seat is installed on the power rotating shaft, and the problems that in the prior art, the center depth of a river is difficult to measure, and crossing measurement is difficult to conduct on the river in a traditional method are solved.

The utility model provides a stamping sheet off-line measuring device, which comprises a sheet seat and a measuring structure, the sheet seat is used for placing a stamping sheet, the measuring structure comprises a measuring probe, the measuring probe is positioned above the sheet seat, and the probe can move in multiple dimensions above the sheet seat. The sheet base can move on the horizontal plane so that the measuring position of the stamping sheet can be matched with the measuring position of the measuring probe. The utility model has the advantages that the sheet can be accurately positioned, the adjustment is convenient, and the measurement is flexible.

The invention relates to a high-throughput mechanical testing device and method based on a DIC technology, and the method comprises the following steps: installing a clamp matched with a to-be-tested material sample on the device, and connecting a clamping mechanism with a strain mechanism; respectively fixing a plurality of material samples to be detected on the clamp; configuring strain parameters and image acquisition parameters; an actuator or a driving system is started to drive the cross beam to move, and tension is synchronously applied to the multiple to-be-tested material samples for synchronous strain; measuring a force value in real time through a force sensor while carrying out strain on the plurality of to-be-measured material samples, and collecting images of scale distance sections of the plurality of to-be-measured material samples through a camera; after the to-be-tested material samples are snapped, performing DIC processing on the acquired images, and calculating strain data of gauge length sections of the to-be-tested material samples; and generating a stress-strain curve of the material sample by combining strain data according to a force value measured in the strain acquisition process, so as to realize high-throughput mechanical test.

The present invention discloses a limb circumference measurement method, system and storage medium based on image recognition, which solves the problem that when the existing method uses a ToF camera to collect data on a limb surface with corners and concave shapes, the ToF camera light will be reflected multiple times, thereby causing unnecessary reflections and measurement distortion, and affecting the measurement accuracy. The method comprises: obtaining time-series limb measurement related data, combining deep learning and the yo lov8 model to pre-build an edge detection model, and identifying and decomposing the limb measurement related data; the edge detection model extracts the limb circumference edge of the patient in the circumference data set, outputs the circumference measurement result, and synchronously uploads the circumference measurement result to the measurement database; the present invention generates a corrected circumference data set by fusing measurement sensor data and limb image data, and uses the edge detection model to perform corrected edge detection and automatic marking on the circumference data set, thereby ensuring the accurate positioning of the measurement point and guaranteeing the advantage of measurement accuracy.

This invention provides a probe adapter and clamping mechanism and a coordinate measuring machine, which solves the problems in existing technologies where the adapter cannot adjust the extension rod according to the position of the hole to be measured, and where the axial horizontality requirement of the hole to be measured is high during measurement. The probe adapter and clamping mechanism includes a locking mechanism, an extension rod, and an attitude adjustment mechanism. The attitude adjustment mechanism includes a first adjusting component, a second adjusting component, and a connecting assembly. The second adjusting component can rotate relative to the first adjusting component to adjust the pitch angle of the extension rod; the connecting assembly securely connects the rotated second adjusting component to the first adjusting component as a single unit. This probe adapter and clamping mechanism allows adjustment of the pitch angle of the extension rod according to the actual placement position of the part to be measured, eliminating the need for the deep hole axis to be perfectly horizontal during measurement, making measurement more convenient, flexible, and versatile.

The utility model discloses intelligent community parking space management equipment which comprises a pre-buried substrate, a lifting sensing assembly is installed on the left side of the top of the pre-buried substrate in a penetrating mode, a self-locking motor is installed on the top of an inner cavity of the pre-buried substrate through a bolt, and the output end of the self-locking motor is fixedly connected with a blocking baffle. And the right side of the pre-embedded base plate is fixedly connected with a connecting plate. According to the utility model, the lifting column, the guide rod, the pressure sensor, the convex seat and the spring are matched for use, so that the pressure sensor and the convex seat can be matched to send out a primary sensing signal and electronically transmit the signal to the digital display controller; through cooperative use of an angle sensor, a movable rod, a rotating rod, a gear and a servo motor, the angle of the license plate recognition camera can be flexibly changed under the driving of the servo motor so as to perform license plate recognition on vehicles with different heights; and the buzzer, the distance measuring sensor and the auxiliary seat are matched for use, so that the distance between the vehicle and vehicles with different heights can be flexibly measured.

The present invention discloses an automatic identification method and system for controlled tool identification based on image processing, the method comprising: constructing an automatic identification model, creating a view, and determining the actual area and actual length of the ruler; receiving user requests in real time, obtaining the original tool graphic image according to the user request, and cutting and denoising the original tool graphic image to generate a denoised tool graphic image; based on the automatic identification model, and according to the automatic identification auxiliary parameters and the tool data structure, performing graphic recognition processing on the denoised tool graphic image to obtain tool data, analyzing and calculating the tool data to obtain the analysis and calculation results; comparing the analysis and processing results with the tool determination parameters, and returning the comparison results. By applying the method and system provided by the present invention, the flexibility, accuracy, real-time and scene applicability of tool measurement are improved.

The invention discloses a wind power blade size measuring device based on machine vision, and belongs to the technical field of laser measurement, the wind power blade size measuring device comprises a supporting seat and an annular rod, the supporting seat is provided with two moving holes, the annular rod is located in the moving holes, and a sliding supporting mechanism is slidably arranged outside the annular rod; according to the device, key components such as an annular rod, a second driving assembly, gears, a toothed bar, a laser measuring assembly, a first driving assembly and a reciprocating screw rod are adopted, the annular rod and the toothed bar with gaps can keep smooth and stable rotation through the arrangement of four supporting wheels and two gears, the stability of the device is improved through the design, and the accuracy of the device is improved. In addition, the rotating laser measurement assembly can carry out laser measurement on the wind power blade along multiple angles, the multi-angle measurement mode enables laser measurement not to be affected by light and fixed angle measurement easily, and therefore the accuracy of the laser measurement result is guaranteed to a certain degree.

The present application discloses a transmission processing method, a terminal and a network device, which belongs to the field of wireless communication technology. The transmission processing method of an embodiment of the present application includes: during the monitoring of a non-physical downlink control channel PDCCH, the terminal monitors a first indication on at least one target channel or signal monitoring opportunity; the terminal performs a predetermined behavior according to the first indication; wherein the predetermined behavior includes at least one of monitoring the target channel or signal monitoring opportunity, monitoring PDCCH, measuring a channel state information-reference signal CSI-RS, and reporting CSI.

The invention relates to the technical field of contact angle measurement, in particular to a static liquid drop contact angle measurement method based on morphological characteristics, a computer readable storage medium and a computer program product. The static liquid drop contact angle measuring method based on morphological characteristics comprises the following steps: acquiring a side view image of a liquid drop in contact with a target surface at an acquisition time node, and extracting morphological characteristics of the liquid drop from the side view image; a target curve fitting model is matched from a curve fitting model library on the basis of the morphological characteristics of the liquid drops, and a plurality of curve fitting models are stored in the curve fitting model library; and fitting the geometrical shape of the liquid drop by using the target curve fitting model, and calculating the size of the contact angle between the liquid drop and the target surface in the side view image based on the geometrical shape of the liquid drop. The method breaks through the limitation of fitting the boundary of the liquid drop by depending on a fixed model in the traditional method, so that the contact angle measurement process is more flexible and better fits the actual morphological characteristics of the liquid drop.

The present application discloses an intraocular pressure measuring device, comprising: a probe, comprising a main body and a probe head arranged at one end of the main body, wherein the material of the main body comprises a magnetic material; a magnetic attraction mechanism, wherein the magnetic attraction mechanism is used to adsorb the probe; and a first coil, wherein the first coil is arranged around the main body, wherein the first coil comprises a driving state and a detection state, wherein in the driving state, the first coil is used to push the probe to move, and in the detection state, the first coil is used to detect the motion state of the probe. The intraocular pressure measuring device disclosed in the present application realizes the function of detecting intraocular pressure by causing the probe to contact the surface of the user's eye and cause a change in motion state; the probe is adsorbed by the magnetic attraction mechanism so that the probe is maintained inside the intraocular pressure measuring device without falling; and a single coil is used to both drive the probe to move and detect the motion state of the probe, thereby reducing the number of coils, simplifying the structure of the intraocular pressure measuring device, and thereby reducing the manufacturing cost and volume of the intraocular pressure measuring device.

The invention discloses a method for measuring a water body attenuation coefficient, which realizes high-precision and parameter-adjustable water body attenuation coefficient measurement through coordination work of a pair of underwater optical communication machines, and comprises the following steps of: performing air calibration and pure water calibration by the optical communication machines to obtain emission reference light intensity; the underwater optical communication machine is used for building a ranging data frame and measuring the transmission time difference to complete ranging; processing full-waveform data of the communication signal passing through the underwater channel to obtain light intensity after water attenuation; and integrating the communication distance, the emission reference light intensity and the attenuated receiving light intensity, and calculating and processing to obtain a water body attenuation coefficient. According to the method, the water attenuation coefficient is obtained by using the communication signal of the underwater optical communication machine, and the method is simple to operate, easy to deploy, wide in application range and suitable for real-time measurement.

The application discloses a retarding potential analysis device, which is characterized in that a plurality of retarding structure units are arranged between an entrance electrode and a retarding electrode, each of the retarding structure units forms a spherical equipotential surface with the entrance as the center at the entrance thereof, the flying direction of the incoming high-energy charged particles is always the same as the direction of the electric field, and the spherical equipotential surface is obtained on the basis of a planar assembly structure. Compared with a planar RPA, the measuring error caused by the inconsistency between the flying direction of the charged particles and the direction of the retarding electric field is greatly reduced, and compared with a spherical RPA, since the spherical center of the equipotential surface is located in the interior of the retarding structure unit, the distance between the RPA and the initial position of the charged particle source can be selected at will, and the measurement is more flexible. By arranging a plurality of retarding structure unit arrays, the measurement cross-sectional area of the plume can be increased. In addition, all the components can be realized by using traditional processing modes, and the cost is low.