77results about How to "Increase scan rate" patented technology

The invention is to provide a fingerprint scanning method and device and a gesture recognition method and device, and is mainly to solve the problems of low fingerprint scanning speed, low point reporting rate of gesture recognition and high error recognition rate in the prior art. The fingerprint scanning method comprises carrying out primary scanning on a sensor area to position a fingerprint area; and carrying out secondary scanning on the fingerprint area to obtain a fingerprint image. The fingerprint scanning method comprises two scanning; one scanning is coarse scanning carried out in the whole sensing image range, and fingerprint area images can be obtained quickly; and then, the fingerprint area is subjected to secondary scanning to obtain the fingerprint images without carrying out fine scanning on the whole sensing images, thereby ensuring precise fingerprint images and meanwhile, improving scanning speed effectively, and reducing average power consumption of sensors.

Techniques are disclosed for enabling accelerated rejoining of network devices in a low-power wireless network after a connection to the low-power wireless network is lost. Embodiments generally include, for a network device that periodically conducts scans for beacons on the low-power wireless network, increasing the frequency, or scanning rate, at which the scans are performed. After a certain period of time, if the network device has not joined the low-power wireless network, the network device can implement a different scanning rate until it rejoins with the network. Additional techniques may be used to reduce power usage and preserve the structure of a portion of the low-power wireless network that has become disconnected with the rest of the network.

The invention discloses a Doppler wave beam sharpening rapid imaging method of a mechanical scanning radar, which mainly solves the problem that the prior art cannot be applied to a mechanical scanning radar. The method comprises the following steps of: firstly determining a pulse accumulation number M and a sharpening ratio N, arranging echoes after the pulse compression into a distance-direction matrix according to a receiving order; taking out two small matrixes which has directional length of 2*M and are mutually overlapped M from the matrix according to the receiving order; respectively performing the Doppler central estimation on the two small matrixes; using two Doppler centers to compute an interpolation frequency point; meanwhile, using the latter Doppler centre to perform the directional Doppler central compensation on the latter small matrix; then performing the directional FFT (Fast Fourier Transform), using the interpolation frequency point to extract a sub-image from thedata behind the FFT, splicing the sub-image according to the receiving order to obtain a large image. Compared with the traditional DBS (direct broadcasting by satellite) imaging method, the Doppler wave beam sharpening rapid imaging method has low computation, and low requirement on the radar performance, and can be applied to the traditional mechanical scanning radar DBS imaging.

The invention relates to a ultrasonic plane wave scanning-type multi-phase flow visual measurement apparatus. An ultrasonic plane wave with an adjustable direction of an ultrasonic phased array probeis emitted to scan a to-be-detected area. The ultrasonic plane wave scanning-type multi-phase flow visual measurement apparatus comprises an ultrasonic phased array, an ultrasonic plane wave generation and control unit, an ultrasonic emission unit, an ultrasonic signal acquisition and processing unit, and a data demodulation unit, a phase distribution reconstruction and display unit. The ultrasonic phased array is a combination of M groups of ultrasonic phased array probes which are uniformly distributed at a same cross section position of a to-be-detected, and each group of the phased array probe comprises N ultrasonic array elements. After each group of the ultrasonic phased array probe can respectively emit the ultrasonic plane wave to other group of the ultrasonic phased array probe, an adjacent next group is switched for excitation, and the above scanning test process can be repeated.

The invention proposes a divided sub-array feed VICTS satellite communication antenna, and aims to provide a low-profile high-gain satellite communication antenna with a wide beam scanning angle and a strong radiation capability. The invention is achieved by the following technical scheme: air long slots equally spaced along a radial direction according to a linear array string are made in the surface of an upper metal rotary table, the bottom of a separator of each air long slot is provided with an air gap blind slot for impedance matching, waveguide cavities arranged symmetrically to the diameter axis are made on the lower bottom of the lower metal circular disc, which corresponds to the upper metal rotary table, each waveguide cavity serves as a feed network for an antenna sub-array through a feed line source of the inner wall thereof, a quasi-TEM wave traveling from the left to the right with an approximately equal amplitude and the same phase at a feed end is generated from the left end of each cavity, the quasi-TEM wave electric field flows into each air long slot from each of the waveguide cavities, and the upper metal rotary table uses each air long slot as a radiation sub-array unit, combines the radiation unit sub-arrays into a large array for radiating an antenna into a natural space, and radiates the antenna into the natural space.

The invention relates to a laser radar and a phased array laser emission unit thereof. A laser beam splitting component, light emitting antennas and a plurality of phase adjusters are included. Through the cooperation of the laser beam splitting component and the plurality of light emitting antennas, multiple paths of lasers can be emitted. The phase adjusters are used to adjust the phases of themultiple paths of lasers and the multiple paths of lasers have a fixed phase difference so that a radiation direction diagram is acquired through interference in a far field, a strongest main light beam is formed at a specific direction and scanning is realized. Further, through changing the phases of the multiple paths of lasers, the different radiation direction diagrams can be acquired so as torealize omnibearing scanning. The laser radar can realize omnibearing monitoring without a mechanical rotating component. The scanning rate of the laser radar is determined by the frequency of phaseadjusting and is not limited by the rotation speed of the mechanical rotating component so that the scanning speed of the laser radar is fast. The sizes of the laser radar and the phased array laser emission unit are small and the scanning rate is high.

The present invention relates to a method for operating a parking assistance system for a motor vehicle (F) with respectively several proximity sensors (1-6) at least in sections registering the vicinity (11-16) of the motor vehicle (F) and with at least one path-measuring sensor registering the path traveled by the motor vehicle (F), wherein the proximity sensors (1-6) can be operated in a first mode, in which, for surveying parking spaces, the length and / or width of the parking space is determined from the values measured at least by individual sensors (1, 6) when driving by a parking space, and wherein the proximity sensors (1-6) can be operated in at least one other mode, in which they are used as parking assistance to avoid collisions, wherein the proximity sensors (1-6) can be activated temporally in both modes with different emission sequences, and wherein the different emission sequences are switched between, depending on the movement of the motor vehicle (F). The invention also relates to a system corresponding to the same.

An optical scanner is disclosed which includes: a first scanning device having a first mirror portion in which a first reflective surface is formed, the first scanning device scanning in a first direction, light which impinges obliquely on the first reflective surface, by oscillatory rotation of the first mirror portion about a first oscillation axis; and a second scanning device having a second mirror portion in which a second reflective surface is formed so as to be generally in parallel to the first reflective surface in a non-active state of the optical scanner, the second scanning device scanning in a second direction intersecting with respect to the first direction, the light exiting the first reflective surface and then entering obliquely the second reflective surface, by oscillatory rotation of the second mirror portion about a second oscillation axis intersecting with respect to the first oscillation axis. The first oscillation axis is oriented substantially parallel to a direction in which the light enters the first reflective surface, when the optical scanner is viewed in a direction perpendicular to the first and second reflective surfaces.

The invention discloses a digital micro-mirror array-based parallel confocal microscopy imaging device and method. A digital micro-mirror device is ingeniously utilized as a beam splitter, and serves as a lighting pinhole and a detection pinhole at the same time, so that a multi-point parallel confocal imaging mode is achieved through combination of a light source, a camera and related optical assemblies. A system can adapt to the imaging requirements of different samples to achieve flexible measurement while a high scanning rate and a high light energy utilization rate are met; and the influence of mechanical vibration is avoided and the stability of the system is improved.

The invention discloses a high-speed optical delay linear scanning device, which comprises a fan-blade-shaped reflector, a quarter-wave plate, a polarizing beam splitter and a motor. The fan-blade-shaped reflector is formed by a plurality of same fan-blade-shaped reflection planes and a base circle coaxially with the centers of the fan-blade-shaped reflection planes. Each fan-blade-shaped reflection plane adopts an outer curved surface of a base circle involute; the plurality of fan-blade-shaped reflection planes are in uniform-angle distribution in the circumference of the base circle. A cylindrical mirror, the quarter-wave plate and the polarizing beam splitter are arranged in sequence, and the direction of optical axis thereof is overlapped with the tangent line of the base circle; and when incident to the polarizing beam splitter, S-polarization incident light is refracted thereby first, then, passes through the quarter-wave plate and the cylindrical mirror in sequence, is incident to the outer surface of the fan-blade-shaped reflector, then, is reflected back in the same way, and then, passes through the cylindrical mirror, the quarter-wave plate and the polarizing beam splitter in sequence to form P-polarized emergent light.

The invention relates to a crossmember unit (2) for a test apparatus (1) for printed circuit boards, wherein the crossmember unit (2) has at least one crossmember (9), which spans a test area in which a printed circuit board to be tested can be arranged, and is designed to receive positioning units (6) for test fingers (8) in a linearly movable manner in such a way that the test fingers (8) can scan at least a portion of the test area. According to the invention, the crossmember unit (2) is designed to receive at least two linear guides (5), which are independent of one another, for guiding in each case at least one of the positioning units (6). The invention is also directed to a test apparatus (1) having at least one crossmember unit (2) of this kind.

The invention discloses a magnetic nano material for magnetic solid phase extraction and a preparation method thereof. The preparation method comprises the following steps: S1, preparing black solid Fe3O4 nano microspheres; S2, preparing Fe3O4@SiO2; S3, weighing dopamine hydrochloride and a Tris buffer solution, the molar concentration of which is 10 mM, and mixing; then adding the Fe3O4@SiO2 andstirring the mixture to react for 16-20 hours; after reaction, centrifugalizing a reaction liquid, collecting bottom solid, and washing and drying the solid to obtain the magnetic nano material. The magnetic nano material combines a conventional mesoporous material with the magnetic nano material, and has properties of the two and has a relatively large specific surface area. Pretreatment is carried out in pesticide extraction of fruits and vegetables by adopting a magnetic solid phase extraction technology, extraction and purification steps are finished by one time of operation, and the method is simple to operate, labor and time saving and low in cost. A complex matrix can be separated efficiently, and various pesticide residues in the complex matrix can be fed at one time and analyzed simultaneously.

The invention discloses a THz-QoMIMO framework suitable for a Terahertz security check instrument, comprising signal processing and target recognition digital hardware, Terahertz MIMO array front end high frequency hardware, and one-dimensional quasi-optics focusing and scanning, and employing an MIMO array layout. By utilizing MIMO synthetic focusing, a system frame rate is increased, and sending and receiving channels are reduced so as to reduce system costs; in addition, the THz-QoMIMO framework can simplify a system whole machine structure, improve system work reliability, perform repeated multi-angle measurement, reduce coherent speckle influence, and facilitate automatic target detection and recognition; besides, the THz-QoMIMO framework employs an image classification recognition method with distance information z as the primary and intensity information I as the complement, and is especially suitable for an active Terahertz rapid security check instrument.

The embodiment of the invention provides a driving method of a display panel, a driving chip and a display device in the technical field of display, and is used for improving the ghost shadow phenomenon and improving display performance. The driving method comprises the steps of monitoring a static pattern displayed by the display panel in a first driving mode and when the display brightness value of the area where a static pattern is located and display brightness value of an area where the surrounding pattern is located meet preset conditions, defining the area where the static pattern is located as a target area; driving a pixel circuit in the target area in a second driving mode, in a second drive mode, enabling the grid line to scan the pixel circuit at a second frequency; wherein inthe first driving mode, the second frequency is greater than the first frequency of scanning the pixel circuit by the grid line, wherein in the second driving mode, the driving period of the pixel circuit comprises a signal switching period, an initialization period, a data signal writing period and a light emitting period, and in the signal switching period, the data line writes different data signals into the pixel circuit.

The invention discloses a volumetric three-dimensional display device and method based on circumferential screen scanning, the device comprises a high speed projection device, a screen turning transmitting device, a screen group, a rotating speed detection device, a central control module and a PC, and the screen group comprises a plurality of screens which are fixedly arranged on the screen turning transmitting device. According to the invention, a screen moves in an imaging space at uniform speed in one direction from beginning to end, imaging complexity is greatly reduced, large depth of field can be realized, compared with reciprocating type screen translation scanning, unidirectional rotation type screen scanning has no acceleration and deceleration process, scanning rate is easily to improve, voxel quantity of three-dimensional imaging is greatly increased, so that three-dimensional imaging resolution is improved, acceleration and deceleration of reciprocating motion are avoided, vibration and loss of hardware and structure portion of the device are reduced, and service life of the device is prolonged.

A resist composition is provided comprising (A) a fluorine-containing polymer, (B) a base resin, (C) an acid generator, and (D) a solvent mixture of a first solvent which is a C5-C8 ketone, C4-C6 alcohol, C3-C6 ether or C4-C9 ester and a second solvent which is a lactone ring-containing C6-C9 compound. A pattern is formed by coating the resist composition, prebake, exposure, and development. In immersion lithography, the resist film is improved in water slip. In EB or EUV lithography, outgassing is suppressed and edge roughness is reduced.

The invention discloses a multispectral imaging structure and method, a chip, a camera module and electronic equipment, and belongs to the technical field of imaging. The multispectral imaging structure includes: a microlens; a photosensitive device which is arranged opposite to the micro lens and is used for converting the received optical signal into an electric signal; a first tunable optical filter and a second tunable optical filter which are located between the micro lens and the photosensitive device and used for transmitting n kinds of light by adjusting the cavity length of the resonant cavity; a first optical filter located between the first tunable optical filter and the photosensitive device; and a second optical filter located between the second tunable optical filter and thephotosensitive device. In the embodiment of the invention, by arranging the two tunable optical filters and the two optical filters, the switching time of spectrum scanning can be greatly improved, and the scanning rate of a photosensitive device is improved, so that the frame rate of image acquisition is improved.

The invention discloses a disk bad track scanning method which comprises the following steps: firstly, scanning a block of a first layer in a disk, entering a second layer when the block of the firstlayer is a first fault block, scanning a target block with finer granularity corresponding to the first fault block, determining a second fault block in the target block, and otherwise, continuing toscan the block of the first layer. Therefore, according to the scheme, coarse-grained scanning is firstly carried out on the disk, that is, blocks of the first layer are scanned, if the blocks of thefirst layer break down, fine-grained scanning is carried out on the blocks of the first layer, that is, the second layer is skipped into, the target blocks corresponding to the broken blocks of the first layer are determined in the second layer, and the target blocks are scanned to determine the broken blocks in the target blocks. Coarse-grained scanning can save the scanning time of faultless blocks, and fine-grained scanning can increase the accuracy of faulty blocks, so that the full-disk scanning rate is increased, and the accuracy of a scanning result is ensured.

The embodiment of the invention discloses a method and equipment for scanning media files. According to the embodiment, the method comprises the following steps: scanning folders and files of an external storage media medium step by step according to the preset sequence by receiving the inserting notification of the external storage media medium; if confirming that the name of one target folder corresponds to the preset name, further confirming whether a parent folder of the target folder is a blue-ray primary disc or not; and if the parent folder of the target folder is the blue-ray primary disc, stopping the scanning sequence aiming at the files in the target folder and recording the parent folder of the target folder as a blue-ray file. The blue-ray primary disc and a blue-ray disc have the same special directory structure and play mode, namely files of the target folder do not need to be scanned when the parent folder of the target folder is the blue-ray primary disc, so that the scanning time of the external storage media medium is reduced, the scanning speed is increased, the system application resources occupied by scanning of the external storage media medium are further reduced, and the scanning efficiency of blue-ray medial files is improved.

The invention relates to the technical field of electrochemistry, in particular to a method for preparing a high-capacity self-supporting manganese dioxide / carbon composite electrode. The method comprises the following steps: firstly, dissolving manganese sulfate and a water-soluble structural stabilizer in a sulfuric acid aqueous solution to form a mixed solution, wherein a radius of metal cations in the water-soluble structural stabilizer is (1-1.52)*10<-10>m; then, selecting a carbonaceous material with a clean surface as an anode, and using the mixed solution obtained in step 1 as an electrolyte; performing oxidization on the anode for electrochemical deposition of manganese dioxide at the temperature of 15 DEG C to obtain a semi-finished product, wherein during performing anode oxidization electrochemical deposition, an electric potential of the anode is controlled to be greater than or equal to 0.14 V; and then, placing the semi-finished product into a solution containing the water-soluble structural stabilizer, and performing a hydrothermal reaction at the temperature of 120-200 DEG C to obtain the high-capacity self-supporting manganese dioxide / carbon composite electrode. The method is simple in preparation process, the obtained product is excellent in performance, and industrial production is facilitated.

The invention discloses a mask-free direct writing photolithography system; the mask-free direct writing photolithography system comprises a direct writing light source, an energy control unit, a laser beam splitting control and scanning unit, a focusing servo unit, a red light detection unit, a multi-axis workpiece platform and a control unit. Under the overall control of the control unit, the light emitted by the direct writing light source irradiates onto the laser beam splitting control and scanning unit through the control of the energy control unit; after being controlled by the laser beam splitting control and scanning unit, the light is focused by the focusing servo unit and detected by the red light detection unit; and finally the multiple paths of light beams are focused on photoresist in parallel for direct writing. According to the photolithography system, independent control of multiple light beams, parallel direct writing and two-dimensional galvanometer scanning can be realized, and the photolithography efficiency is improved in a multiplied mode compared with a single-point scanning system. The scanning speed and the scanning freedom degree of a direct writing photolithography machine are improved.

The invention provides ultra-high-speed laser cladding iron-based metal powder, and a preparation method and application thereof. The iron-based metal powder comprises the following chemical components of, in percentage by mass, 0.6 %-1.0% of C, 17.0 %-20.0 % of Cr, 5.0 %-6.5 % of Ni, 2.0 %-4.0 % of Mn, 1.0 %-1.5 % of Mo, 4.0 %-6.0 % of Ti, 1.0 %-1.5 % of B, 0.08 %-0.15 % of N, less than or equalto 0.5% of Si, less than or equal to 0.030% of P, less than or equal to 0.030% of S and the balance Fe and inevitable impurities. According to the metal powder, the particle size is 15-65 microns andthe fluidity is 16-20 s / 50g. The invention further provides the application method of the metal powder. According to the application method, by adopting an super-high-speed laser cladding technology,and matching different processes, a shaft part base body surface is strengthened and repaired.

The invention relates to a method for designing a single-sideband modulation electric control segmented sweep frequency source. The method is characterized in that output signals of the n DFB laser light sources are distributed at equal intervals according to the wavelength; output of the n DFB laser light sources is integrated and output at the same time through the wavelength division multiplexing technology, then frequency spectrum broadening is conducted on discrete output signals of the signals with the equal wavelength intervals through single side band modulation, and it is guaranteed that all frequencies are output in the broadening process so that swept-frequency signals with continuous wavelengths can be formed and output.

The invention relates to the methods and systems for remotely detecting metal items, for example, weapons, concealed in cloths or belongings and may be used in security complexes. The proposed system contains a phased antenna array 1 radiating a continuous frequency-modulated ultra high or super high frequency signal and scanning a controlled space, a receiver 2 of reflected signals, a processor 3, a display 4, and a video camera 5. The processor 3 detects a potentially threatening metal item during any scanning period other than the initial period if one of the two comparison conditions holds for some radiation direction: Ai>A0+Δ or Ai<A0−Δ where Ai is the code of the signal amplitude at the output of the receiver 2 of the reflected signal during any scanning period following the initial period for some radiation direction; A0 is the code of the signal amplitude at the same output for the same direction of radiation during the initial scanning period when no potentially threatening metal items are allowed in the scanning sector, and Δ>0 is the tolerance of the deviation of the code A0 taking into account permissible changes in the reflected signal. Advantages of the invention: extension of the range of permissible distances to detected metal items, increased noise immunity, simplified operator activities, and increased scanning rate and reliability.

The invention relates to a scanning optoelectronic detection device and to a method for detecting the environment of a motor vehicle (1) in a scanning manner by means of an optoelectronic detection device (2). The detection device (2) comprises a transmitting and receiving optical unit (4), which outputs electromagnetic beams and images reflected beams on a detector, wherein the detector has a multi-cell design and comprises a plurality of detector cells for providing electrical reception signals in dependence on received reflected beams, which detector cells are lined up in a detector cell stack and can be evaluated in parallel measurement planes. The detection device also comprises a mirror support (7) having mirror surfaces (9, 10) facing away from each other, which are arranged tilted at a tilt angle in relation to an axis of rotation (8) of the mirror support (7) and which image different vertical detection ranges for reflected beams onto the detector. According to the invention, in order to enable the detection of the environment of a motor vehicle by means of an optoelectronic detection device with the greatest possible detection range and with little construction complexity, such certain tilt angles alpha of the mirror surfaces (9, 10) are provided that the detection ranges (14', 14") overlap in a center section of a total detection range (16).

The invention discloses a butt clamp positioning rotary lifting type computer experiment omnibearing scanning detector. The scanning detector comprises a support table, a scanner body, a first motor,a second motor and a computer mainboard, wherein a supporting rod is fixedly welded to the upper surface of the supporting table. A scanner body is fixed on the right side surface of the supporting rod through bolts; a connecting rod is welded and fixed to the upper surface of the supporting table; the connecting rod is arranged on the outer surface of the connecting rod; a fixed rod is welded andfixed to the outer surface of the connecting rod, a containing rod is welded and fixed to the upper surface of the supporting table, a threaded rod is arranged in the containing rod, a transmission gear is arranged on the upper surface of the containing rod, a first motor is fixed to the surface of the rear side of the containing rod through bolts, and a connecting disc is welded and fixed to theupper end of the containing rod. According to the butt clamp positioning rotary lifting type computer experiment omnibearing scanning detector, the detection rate of a computer mainboard is improved,and the probability that the computer mainboard is damaged is also reduced.

The invention provides a server stability test method and system. The method comprises the steps of obtaining a test file from an auxiliary terminal through a serial port; executing the test program to obtain test data; performing encryption processing on the test data; judging whether an error between the test data and the standard value is within a preset error threshold range or not, and if so,judging that the test is passed. According to the server stability testing method and system provided by the invention, virus scanning is carried out before testing, the safety of the server can be ensured, and the adopted performance judgment method is convenient for technicians to intuitively analyze the performance of the server, so that the server is convenient to maintain; according to the encryption method adopted by the invention, three-level encryption of the test data can be realized, and the security of the test data is improved.