64results about How to "Large scanning area" patented technology

In an optical angle-measuring device for ascertaining the relative movement between at least one scanning grating and a graduated disk having at least one measuring graduation, the scanning grating is in the form of a linear scanning grating, and the graduated disk includes a first and a second combined radial-circular grating as measuring graduation, and has a mirror. An incident beam of rays is initially split at the scanning grating into two partial beams of rays that then propagate in the direction of the first combined radial-circular grating and are diffracted there, then propagate in the direction of the mirror and are reflected there in the direction of the second combined radial-circular grating, subsequently propagate in the direction of the second combined radial-circular grating and are diffracted there, and then propagate in the direction of the scanning grating, where a superposition of the partial beams of rays results.

In an optical angle-measuring device for ascertaining the relative movement between at least one scanning grating and a graduated disk having at least one measuring graduation, the scanning grating is in the form of a linear scanning grating, and the graduated disk includes a first and a second combined radial-circular grating as measuring graduation, and has a mirror. An incident beam of rays is initially split at the scanning grating into two partial beams of rays that then propagate in the direction of the first combined radial-circular grating and are diffracted there, then propagate in the direction of the mirror and are reflected there in the direction of the second combined radial-circular grating, subsequently propagate in the direction of the second combined radial-circular grating and are diffracted there, and then propagate in the direction of the scanning grating, where a superposition of the partial beams of rays results.

The invention discloses a capacitance type micro-ultrasonic sensor ring array with an oval diaphragm unit structure and a circuit system thereof. The work unit of the ring array is an oval diaphragm secondary array. The oval diaphragm secondary array comprises an oval vibrating diaphragm, oval diaphragm secondary array top electrodes and oval diaphragm secondary array top electrode outlet PADs, wherein the oval diaphragm secondary array top electrodes are distributed above the oval vibrating diaphragm, and each oval diaphragm secondary array top electrode is connected with the corresponding oval diaphragm secondary array top electrode outlet PAD. An FPGA controls a transmitting end to scan each device unit and send phase-controlled pulse signals, and focusing and translation of transmitted acoustic waves of the capacitance type micro-ultrasonic sensor ring array with the oval diaphragm unit structure are achieved through a phased array. A receiving device receives ultrasonic echo signals which are then read into an FPGA memory through a pre-amplifier and an analog to digital conversion module (AD), and imaging is conducted according to the phase and amplitude of each received signal. According to the capacitance type micro-ultrasonic sensor ring array with the oval diaphragm unit structure, the sweep area of the imaging ring array is increased and the receiving sensitivity of an oval vibrating diaphragm is improved.

The invention belongs to the technical field of surface micro-area analysis in the field of material science, and particularly relates to an analysis rating method for manganese sulfide inclusions in steel based on a calibration curve by the aid of a laser-induced breakdown spectroscope. The method includes the steps: (a) acquiring the calibration curve; (b) scanning analysis samples; (c) measuring ablation spots; (d) analyzing results. The signal intensity of component elements of the manganese sulfide inclusions is acquired, the calibration curve is used for inversion to obtain the length or the area of the manganese sulfide inclusions, sample pretreatment is simple, analysis is rapid, and scanning area is wide in range.

The invention relates to a rotary sampling device of a portable near-infrared spectrometer of an AOTF (acousto-optic tunable filter). The rotary sampling device comprises a rotary sampling table, a sampling cup, a compact block and a bracket, wherein the rotary sampling table is arranged on the bracket; the rotary sampling table comprises a shell; a round hole for containing the sampling cup is arranged in the shell; a rotary gear and a motor gear are arranged inside the shell; the rotary gear is in transmission connection with the motor gear; a to-be-tested sample is contained inside the sampling cup when needing to be detected; the compact block is adopted to press the to-be-tested sample, and then the sampling cup is put into the round hole in the shell of the rotary sampling table; and the sampling cup is paved inside a groove with a through hole immediately. The rotary sampling device of the portable near-infrared spectrometer of the AOTF is aligned at the non-circle center part of the bottom of a quartz cup along a detection hole; a test cup rotates under the drive of the rotary gear; and a lens of the portable near-infrared spectrometer of the AOTF immediately detects the to-be-tested sample in an annular area with a fixed radius, and can detect a plurality of groups of data.

The invention relates to an all view field statistics expression method of alloy microstructure via fluid micro-detection strain. The method includes the steps of: a) grinding and polishing the surface of an alloy sample to mirror finish degree, no polishing defect remaining, and determining a to-be-detected zone on the surface of the alloy sample; b) performing initial morphology measurement to the surface of the alloy sample via a white-light interference three-dimensional morphology instrument; c) performing isostatic pressing technology, acquiring microstructural deformation of the surfaceof the alloy sample, and performing morphology measurement to the surface of the alloy sample via the white-light interference three-dimensional appearance instrument after the deformation in order to obtain a micro-morphology change map of the alloy surface microstructure; d) performing cross-dimension rapid quantitative statistic distribution expression to morphology change before and after theisostatic pressing to the microstructure of the to-be-detected zone of the alloy sample, thus obtaining corresponding an all view field metallographic map. The method has simple pretreatment of samples, is high in analysis speed and is large in scanning area, and can satisfy demands of high-throughput cross-dimension analysis and further guide extraction of a metallographic characteristic unit ofthe material.

Disclosed is an improved OCR system wherein the same can be utilized for capturing and analyzing multiple images of a document to increase the efficiency and accuracy of digitizing printed texts on the document. Captured images are merged into a single set of character recognition results via a recognition method from multiple images, which include early fusion, late fusion, and hybrid fusion embodiments. The end product from each of the embodiments provides text and metadata that include recognized words. In late and hybrid fusion, words having confidence scores above a predetermined threshold are assembled together to form paragraphs to reconstruct a digital version of the document. In this way, the present invention utilizes multiple images that can be combined to aggregate information and achieve high accuracy when scanning and digitizing printed texts.

This invention discloses a interference scanning device, which is an improved structure on the basis of a reflector, the individual zones of the reflector have different optical paths and each zone gets its own optical path interference information of every instant and sums up the information to find out the instant information specific being tested positions with the help of computing the moving rate of the interfere unit to simulate the up-down measurement to said positions. Each time when measuring, the interference scan device only needs to shift the interfere unit horizontally at the same height to obtain the measured result of the interferometer.

The invention discloses a waste secondary machining device for stamping equipment. The secondary machining device comprises a base, a laser cutting machine, a controller, a rotating mechanism, a lifting mechanism and a feeding mechanism, wherein the laser cutting machine is arranged on the front side of the top end of the base; the controller is arranged on the side wall of the laser cutting machine and electrically connected with the laser cutting machine; the rotating mechanism is embedded in the top end of the base and located on the rear side of the laser cutting machine; the lifting mechanism is arranged at the top end of the rotating mechanism; and the feeding mechanism is arranged at the top end of the base through a support in the vertical direction and located on the rear side of the lifting mechanism. According to the waste secondary machining device for the stamping equipment, waste plates obtained after stamping can be recycled, the reutilization and machining of the waste plates are achieved, the waste is avoided, intact parts of the stamped waste plates can be cut, manual operation items of workers are reduced, and the time and labor are saved.

The invention discloses an automatically stretching type vertical-axis wind driven generator comprising a generator, a spindle, a spoke, vanes, a support rib and a screw rod. The screw rod is mounted on the spindle which is connected with the generator, and the vanes are mounted on the spindle through the spoke and connected with the screw rod through the support rib. The automatically stretching type vertical-axis wind driven generator further comprises a support frame, a heavy ball, a gear, an inner sleeve, an outer sleeve, an inner brake and an outer brake, when the wind speed is too high, the heavy ball locks the outer sleeve, the gear drives the screw rod to move downwards, the vanes close up, and the outer brake limits the displacement of the screw rod; when the speed is too low, the heavy ball lock the inner sleeve, the gear drives the screw rod to move upwards, the vanes expand, and the inner brake limits the displacement of the screw rod. The automatically stretching type vertical-axis wind driven generator is driven without a motor, vanes' sweeping area is decreased automatically when wind speed is too high and increased automatically when wind speed is too low, the generating capacity of the vertical-axis wind driven generator is increased, safe and stable running of the vertical-axis wind driven generator is guaranteed.

The invention relates to an efficient laser drilling and cleaning optical system, and belongs to the technical field of laser scanning. The efficient laser drilling and cleaning optical system comprises a shell, an upper cover, an optical fiber collimating coupler, a coupler flange, a field lens assembly, an electrical connector, a beam expander assembly, a reflector assembly, a polygonal mirror assembly, a motor assembly and a photoelectric switch assembly, wherein the optical fiber collimating coupler, the coupler flange, the field lens assembly, and the electrical connector are arranged onthe outer side of the shell, and the beam expander assembly, the reflector assembly, the polygonal mirror assembly, the motor assembly and the photoelectric switch assembly are arranged in the shell.The optical fiber collimating coupler is connected to the side face of the shell through the coupler flange, the beam expander assembly is arranged in the laser entering direction of the optical fibercollimating coupler, and the reflector assembly is arranged in the laser entering direction of the beam expander assembly, and reflects lasers to the polygonal mirror assembly. The motor assembly isconnected to the polygonal mirror assembly in a transmitting mode to drive the polygonal mirror assembly to rotate, and the field lens assembly is arranged in the laser reflection direction of the polygonal mirror assembly. According to the efficient laser drilling and cleaning optical system, the speed of laser scanning can be greatly increased, so that the efficiency of laser drilling or laser cleaning is improved.

The invention relates to a fire fighting device and belongs to the technical field of fire fighting detection devices. The fire fighting device comprises a fire fighting water gun, a water tank I, a water tank II, a chassis and walking legs; and the water tank I and the water tank II are installed on the chassis, the fire fighting water gun is installed on the water tank I, and the walking legs are installed on the periphery of the chassis. By the adoption of the fire fighting device, independent foot sole sensors of the fire fighting device can be used for feeding motion back to toes, the device can effectively avoid upper-air falling objects generated due to combustion in the walking process, and fire fighting operation safety can be improved; the raking area of a high-pressure fire fighting water gun head is large, the high-pressure fire fighting water gun can be used for effectively extinguishing fire in the position near a kindling point where a firefighter cannot reach, time andlabor are saved, and the device is safe and reliable; the high-pressure fire fighting water gun is pressurized through a secondary pump, the pressure of the water pump can be higher, and fire is moreeffectively extinguished; the weight of a body can be reduced, installation and detachment are convenient, and damageable parts are convenient to replace; and operation is conducted conveniently.

The embodiment of the invention discloses a wavelength conversion device and a projection system. The wavelength conversion device comprises an excitation light source, a light emitting module and a first vibration system, and is characterized in that the excitation light source is used for emitting excitation light, the light emitting module is used for receiving the excitation light, converting the received excitation light into light with specific wavelength and emitting the light, and the first vibration system is located at the side, which is away from the excitation light source, of the light emitting module and used for driving the light emitting module to move in a reciprocating manner along a first preset direction. In the wavelength conversion device provided by the embodiment of the invention, the scanning area of convergent light spots of the excitation light in unit time is increased through reciprocating movements of the light emitting module, and the scanning area of the convergent light spots of the excitation light is not enabled to be fixedly concentrated in a certain area of the light emitting module, so that the energy density borne by a light emitting layer in the light emitting module in unit time and unit area is effectively reduced, the heat dissipation effect of the wavelength conversion device is improved, and the light emitting efficiency of the wavelength conversion device is improved.