231results about How to "Reduce the number of measurements" patented technology

The invention provides a distance measurement method, device and system and a readable medium, and belongs to the technical field of distance measurement. The method comprises the steps of scanning aBluetooth signal broadcasted by a base station through a Bluetooth module; calculating a first distance between the beacon and the base station according to the Bluetooth signal, and judging whether the first distance is within a preset distance measurement range or not; wherein the preset ranging range is smaller than the ranging range of the UWB module; if the distance is within the preset distance measurement range, starting a UWB module; and calculating a second distance between the ranging terminal and the base station through the UWB module. The UWB module can be started only when the first distance is within the preset distance measurement range, the preset distance measurement range is smaller than the actual distance measurement range of the UWB module, and compared with the priorart that the UWB module needs to be started all the time, the number of UWB measurement times is reduced, and therefore power consumption is greatly reduced.

The invention discloses a cell switching method, an information transmitting method, and related equipment. Cell switching efficiency is improved in a specific scene of high speed train operation, and therefore communication performance of terminal equipment is improved. The cell switching method comprises steps that the terminal equipment is used to acquire a cell switching list transmitted by a base station corresponding to a current service cell; the terminal equipment is used to determine whether a current moving state is in a high speed moving state; when the current moving state is a high speed moving state, the cell comprising a first identification selected from the cell switching list is identified as a first target cell, and the first identification is used to identify the first target cell as the high speed service cell; the high speed service cell is the cell in a high speed rail preset distance range; the terminal equipment is used to identify a second target cell from the first target cell according to signal intensity; and the terminal equipment is switched from the current service cell to the second target cell.

The invention discloses a camera three-dimensional measurement device, a system and a method in combination of calibration and correction, which belong to the field of three-dimensional structured light measurement. The device comprises a to-be-measured object, a three-dimensional calibration module arranged above the to-be-measured object, a camera for carrying out simultaneous imaging on the to-be-measured object and the three-dimensional calibration module and a PC for receiving image data of the camera. The system is composed of a calibration module and a correction module. In the method, through calibrating the three-dimensional calibration module and in combination of a correction algorithm, image pixel coordinates are obtained finally. Multiple calibration surfaces of a cube calibration object are made full use of, effects that the camera acquires data from multiple angles through one-time data acquisition can be achieved, the measurement times are effectively reduced and error accumulation is avoided; and besides, in combination of a distortion correction algorithm based on Newton iteration, the calibration parameter calculation value stability is further improved, and the purpose of improving the three-dimensional measurement precision is finally achieved.

The embodiment of the invention discloses a method for transmitting channel sounding reference signals SRSs, a terminal and a base station. The method comprises following steps of receiving downlink service sent by the base station, wherein the downlink service is transmitted based on a target channel, and the target channel is the channel in an unlicensed frequency band; periodically sending the channel sounding reference signals SRSs to the base station, wherein the SRSs are used for sounding the channel quality of the target channel; judging whether the difference value between the deadline of the downlink service and the sending time of the SRSs is less than or equal to a preset threshold value or not when uplink service needs to be sent to the base station, wherein the SRSs are transmitted based in the target channel; not carrying out LBT sounding if the difference value is less than or equal to the preset threshold value; sending the uplink service to the base station; carrying out the LBT sounding if the difference value is more than the preset threshold value, wherein the LBT sounding is used for sounding the idle/busy state of the target channel; and sending the uplink service to the base station when the target channel is in an idle state. Through adoption of the method, the terminal and the base station, the times of carrying out LBT (Listen Before Talk) sounding can be reduced, and the data throughout can be improved.

The invention discloses a quick phased-array antenna calibrating method and system. The quick phased-array antenna calibrating method includes calculating phase of each antenna unit via algorithm calculation by measuring sum signal power value of sum signals in 4 (N-1) phase change times (N is the number of phase-array antenna units) along with the antenna units; changing reference channels, measuring power values of the sum signals in 4 (N-1) phase change times along with the antenna units and calculating amplitude of the antenna units through algorithm calculation. By the quick phased-array antenna calibrating method, measuring times and operation are few, the integral calibration process costs less system occupation time, and the phased-array antenna calibrating method is rapid; the integral process has no need to directly measure phase, engineering implement is simple, and power measurement is more stable and reliable as compared with phase measurement, and the quick phased-array antenna calibrating method is robust. When some channels of phased-array antennas have faults, phase difference and amplitude value of other channels are effective by the calibrating method, fault pervasion is avoided, and the quick phased-array antenna calibrating method has the advantage of robustness.

The invention provides a high-speed railway LTE system cell reselection system and method based on geographical location information and relates to the technical field of mobile communication. The system comprises a base station arranged along a running track of a train and a vehicle-mounted device installed on the train, wherein a base station device comprises a receiving unit, a base station storage unit and a triggering judgment unit, and the vehicle-mounted device comprises a measurement unit, a sending unit, a vehicle-mounted storage unit and a control unit. According to the cell reselection method, a speed measurement result, lower than a preset threshold value, reported by the vehicle-mounted device is received on a source base station, a cell reselection process follows an R criterion, and if the speed measurement result is higher than the preset threshold value and the longitude and latitude information is consistent with data stored by the base station storage unit, the cell geographical location reselection process is started at the moment. On a high-speed moving scene, UE can fast reselect a reasonable target cell, and meanwhile it can be prevented that because of over-high running speed of a train, users can not surf the Internet.

The invention relates to an ultra-sensitive spectral imaging astronomical telescope based on second-order compressed sensing, which comprises an optical unit and an electric unit, wherein the optical unit comprises an astronomical telescope lens, a first spatial light modulator, a collimation part, a spectrometric part, a spectral convergence part, a second spatial light modulator and a collection part; the electric unit comprises a single-photon point detector, a counter, a random number generator, a control module, a data packet memory and a compressed sensing module; a celestial image is collected through the astronomical telescope lens, and is imaged to the first spatial light modulator; a randomly modulated light beam is collimated into parallel light, and the parallel light forms a spectral band through the spectrometric part; the spectral band is secondarily randomly modulated through the second spatial light modulator, and is finally collected in the single-photon point detector; and a compressed sensing algorithm is used for obtaining an astronomical target spectral image according to a photon count value and two groups of random matrixes.

The invention relates to a large-scale complex curved surface measurement system and an application thereof. The measurement system comprises a pedestal, a horizontal support, a pitching support, and a computer. The horizontal support is disposed on the pedestal, and the pitching support is connected with the horizontal support. The pitching support is provided with cameras, a laser range finder, and a linear laser emitter. Two sides of the laser range finder are provided with two cameras. The computer is electrically connected with the cameras, the laser range finder and the linear laser emitter. The measurement system obtains image data through point laser positioning, linear laser sampling and the cameras, obtains images in a photographing mode, calculates the actual coordinates of pixels through employing the principle of photogrammetry, and finally carries out the data reconstruction of a complex curved surface in the same coordinate system through data jointing. The measurement system and sampling method simplify the measurement process under the condition of guaranteeing the precision, reduce the measurement times, and greatly improve the measurement efficiency.

The invention discloses an object three-dimensional shape measurement method using a single pixel detector and a device thereof. A structural light field generator generates a series of cosine distribution lighting light fields which light target objects in turn through a lighting lens group; an imaging lens group performs imaging of the lighted target objects to a plane grating device so as to form target object images modulated by the plane grating device; the single pixel detector receives light signals of the modulated target object images in turn according to different lighting light fields and outputs electric signal response values in turn, and calculates the Fourier spectrum primary component I<1><~> of the modulated target object images by utilizing a series of electric signal response values; modulation phase distribution of the target object images is calculated through I<1><~>, and difference value calculation is performed on modulation phase distribution of the target object images and modulation phase distribution of reference plane plate images so that phase difference distribution deltaphi(x,y) is obtained; and then the measured values of height distribution h(x,y) of the surface shape of the target objects to be measured are obtained by utilizing the corresponding relation of phase difference and height.

The invention discloses a condition part measuring associated imaging method based on compressive sensing. According to the method, the compressive sensing (CS) is combined with the associated imaging method based on condition part measurement. On one hand, part condition measurement is adopted in the method, restored imaging data are reduced into a half of traditional associated imaging rebuilt data, and positive images and negative images can be given at the same time, and on the other hand, an advanced signal processing method (the compressive sensing) is used to rebuild image information of an object, so that less measuring data can be used to obtain the image information of the object through a convex optimal solution. Consequently, the method reduces imaging restoration time, improves imaging quality, and provides reference for practical associated imaging.

The invention discloses a single-pixel photon counting three-dimensional imaging system and method based on multi-resolution wavelet approximation. The imaging system comprises a structure light projection system, a photon receiving system and a synchronous control and signal processing system; a target scene is imaged through adopting a single-photon camera structure formed by combining a single-pixel photon detector and a digital micro-mirror device (DMD). According to a multi-resolution wavelet approximation principle, detail information from a low resolution to a high resolution ratio of the target scene is gradually obtained from an initial resolution ratio image, and is used for reconstructing a final resolution ratio three-dimensional image. According to the single-pixel photon counting three-dimensional imaging system and method, the number of times of sampling is effectively reduced and the imaging time is shortened; the single-pixel photon counting three-dimensional imaging system and method are applicable to high resolution ratio three-dimensional imaging application; meanwhile, the computation cost of a CS (Chirp Scaling) algorithm is avoided and the time needed by reconstruction is shortened; the single-photon camera structure formed by combining the single-pixel photon detector and the DMD is utilized so that the system size is reduced and the system structure is simplified; the single-pixel photon counting three-dimensional imaging system and method have the characteristics of simple structure, high reliability and low cost.

An embodiment of the invention provides a method and device for measuring different frequencies of a user terminal before switchover and relates to the communication field. The user terminal can be indicated to perform measurement of a non-service base station after the user terminal is judged to be close to the non-service base station, the measurement times of the user terminal are further decreased, and power consumption of the user terminal is reduced. The method for measuring the different frequencies of the user terminal before switchover comprises the steps of receiving frequency spectrum information from the non-service base station, wherein the frequency spectrum information includes receiving power of the non-service base station, and the receiving power of the non-service base station is measurement strength of the non-service base station to received signal sent by the user terminal; obtaining transmitting power of the user terminal; sending a measurement instruction to the user terminal to indicate the user terminal to measure the non-service base station when the difference between the transmitting power of the user terminal and the receiving power is smaller than a preset threshold value.

The invention discloses a real-time compression and reconstruction method of a Video-SAR (Synthetic Aperture Radar) image. A Robust-PCA (Principal Component Analysis) is used for effectively inhibiting coherent speckle noise in the Video-SAR image, and detail texture characteristics are favorably retained. Through the training and learning of an optimal Wavelet packet basis dictionary, good sparse representation on the Video-SAR image is realized so as to reduce a measurement amount, improve reconstruction precision and store the parse matrixes of different types of scenes, and the parse matrixes are directly called during dilution representation to reduce an operation amount. The frame difference of the key frame and the non-key frame of the Video-SAR image is subjected to low-complexity compression coding at different sampling rates, and distributed compression perception reconstruction can be adopted to meet real-time transmission requirements. A Canny operator is used for carrying out edge detection to realize a purpose that the non-key frame is subjected to Bregman iteration fine decoding, and the high-resolution SAR image with rich details can be reconstructed.

Embodiments provide apparatuses, methods and computer programs for a mobile transceiver and a base station transceiver, a mobile transceiver, a base station transceiver and a mobile communication system. The apparatus (10) for the mobile transceiver (100) in a mobile communication system (300) comprises means for receiving (12) information on a periodic measurement configuration for an inter-frequency measurement from a base station transceiver (200, 305) of the mobile communication system (300) on a first frequency layer. The inter-frequency measurement refers to a repetitive measurement on a second frequency layer with a repetition cycle, which is such that the mobile transceiver (100), when moving at a velocity below a velocity threshold, is located in a coverage area of another base station transceiver (315) on the second frequency layer for at least two repetition cycles. The apparatus (10) further comprises means for measuring (14) a radio signal on the second frequency layer based on the information on the periodic measurement configuration to obtain an inter-frequency measurement result, and comprises means (16) for reporting information on the inter-frequency measurement result to the base station transceiver (200, 305) of the mobile communication network (300), when the inter-frequency measurement result fulfills a threshold criterion. The base station transceiver apparatus (20) comprises means (22) for providing the information on the periodic measurement configuration for the inter-frequency measurement to the mobile transceiver (100) and means for receiving (24) the information on the inter-frequency measurement result from the mobile transceiver (100).

The invention discloses an automatic mold adjusting method, belonging to the technical field of tyre vulcanizers. Under a mold adjusting state, the automatic mold adjusting method comprises the following steps: (a) setting a standard mold height value H in a control unit of the vulcanizer, wherein the standard mold height value H is a distance between a fixed height position on the vulcanizer and an upper side plate of a standard mold; (b) replacing a tyre mold; (c) measuring an actual height value H1 from a fixed height position to an upper side plate of the replaced tyre mold, and transmitting the actual height value H1 into the control unit; (d) comprising H1 and H, driving a driving cylinder to drive the tyre mold to move by means of the control unit, wherein the movement distance delta H is equal to absolute (H-H1). According to the automatic mold adjusting method, the height adjustment of the mold can be automatically finished after the tyre mold is replaced, the labor intensity of operation workers is lightened, the mold replacement operation time is saved, the automation degree is improved and the production efficiency is improved; the automatic mold adjusting method is widely applied to the adjustment of the tyre mold in the vulcanizer.

The invention relates to a method for realizing local oscillator leakage calibration based on slope. The method comprises the steps of randomly selecting an initial point, setting a stepping value and measuring local oscillator leakage. Circulation of an I component and a Q component is carried out in a large step through a first layer of circulation, and a rough interval range where the lowest point of local oscillator leakage power is located is determined; through second-layer circulation, circulation is carried out in a small step mode, and the power lowest point obtained through measurement is recorded; and through a third layer of circulation, dimension value offset is carried out on the I component and the Q component respectively, the value of the lowest point is recorded, and the I component and the Q component with the minimum local oscillator leakage power value are obtained. The invention also relates to a corresponding system, device, processor and computer readable storage medium. According to the method, the system and the device for realizing local oscillator leakage calibration based on the slope, the processor and the computer readable storage medium thereof, compared with I and Q changes of one dimension, the measurement times of local oscillator leakage calibration are greatly reduced, so that the required calibration time is shortened, and the calibration efficiency is higher. According to the invention, after the I component and the Q component are respectively adjusted to the lowest point, the I component and the Q component are respectively adjusted, and the numerical value is changed.

The invention discloses a ghost imaging method and a ghost imaging device with the application of the method. The method comprises the steps of (S1) building a ghost imaging optical path, and using a diffuser to decompose the broadband light emitted by a broadband light source into a speckle field with narrow-band light of multiple different bands, (S2) using a calibration instrument to carry out initial calibration on the speckle field to obtain a speckle pattern, (S3) changing the speckle field through at least one mode in changing the incident angle of the broadband light source, adjusting the distance between the broadband light source and the diffuser and rotating the diffuser, and calibrating the speckle field again so as to obtain a speckle pattern set, and (S4) using the calibrated speckle set to carry out ghost imaging. According to the ghost imaging method of the embodiment of the invention, the multi-spectral multiplexing can be realized, the ghost imaging speed can be improved, the measurement times can be reduced, and the imaging efficiency can be improved.

The invention relates to an electronic element installing method, in particular to an electronic element installing method which is applied to the field of desktop type chip mounters and comprises the steps that an image and recognition features of a suction nozzle are acquired through image capturing devices, and then an electronic element is installed on a printed circuit on the basis of a processing result of image information. According to the electronic element installing method, the rotating trace of the suction nozzle is acquired through a tracing mechanism, the step of optical axis alignment of the part and circuit board image capturing devices is omitted very skillfully, and the problem that the circuit board image capturing device cannot directly obtain the practical rotating center of the suction nozzle is solved; the relative position relation between the practical rotating center of the suction nozzle and an image capturing center of the circuit board image capturing device can be efficiently determined and deviation between the practical rotating center and a designed rotating center can be corrected on the basis that too much cost of an existing desktop type chip mounter structure is not increased, therefore, operating personnel can easily learn, and printed circuit board production chip mounting can be efficiently performed.

The embodiment of the invention relates to the technical field of communication, and discloses a cell measurement method and terminal equipment, and the method comprises the steps: obtaining the motion data of the terminal equipment when the terminal equipment resides in a current service cell and does not need to switch cells; under the condition that the motion data indicates that the terminal equipment does not move, if the RRC link is in an idle state and the fluctuation range value of the signal strength of the current service cell is smaller than or equal to a fluctuation threshold, closing cell measurement; according to the invention, cell measurement can be carried out flexibly, the cell measurement frequency is reduced under the condition that the normal use of a terminal equipment network is not influenced, and the purpose of saving power consumption is achieved.

The invention relates to the field of weak light imaging and the field of polarized light imaging, in particular to a single photon compression polarization imaging device and method. The single photon compression polarization imaging device includes an imaging target, object lens, a rotating polarized film, a rotating translation stage, digital micro-mirror devices, focusing lens, a single photondetector, a controlling andsynchronous counting model base on FPGA and an upper computer. According to the single photon compression polarization imaging device, the controlling and synchronous counting model base on FPGA controls the digital micro-mirror devices turning and the rotating polarized film rotating to obtain photon counting values of four polarized angles based on compressed sensingso that image reconstruction and integration are conducted. Therefore, measuring costs and measuring times are reduced, and the luminous flux and the sensitivity of the single photon compression polarization imaging device are improved. At the same time, the single photon compression polarization imaging device has the advantages of high-integration level and being simple and convenient to operate.