132 results about "Range function" patented technology

One embodiment of the present invention provides a unique ranging technique in wireless communication environments that employ relay stations associated with a base station. Each relay station, and optionally the base station itself, can be allocated a unique ranging region having unique ranging resources that may be used by a mobile station to initiate a ranging function with the corresponding relay station or base station.

The invention relates to a handheld thermal infrared imager. The handheld thermal infrared image comprises infrared imaging sensors, a visible light camera, a laser range finder, a Bluetooth module, a magnetic compass module, an MEMS micro gyroscope, a GPS module, a wireless transmission module, a Linux system embedded signal control panel and an LED display screen. Data of the multiple sensors can be integrated, resources can be reasonably allocated, complex algorithms can be achieved, the performance of handheld equipment can be improved, and the systematization of single machines can be improved. The invention further discloses a Linux-system-based algorithm for the handheld thermal infrared to carry out quick locking and ranging on a small target. According the principle of the MEMS micro gyroscope and the image processing algorithm, the target can be quickly and accurately locked and traced through digital images of infrared light and visible light, and the quick locking and ranging functions are effectively achieved through the laser range finder. The handheld thermal infrared can eliminate video jitters in real time, improve the video quality, lock the target quickly, recognize and detect the target distance automatically and improve the functionality of the handheld equipment.

The invention discloses a method for measuring the occurrence of a non-contact structural surface. The method comprises the following steps: establishing a descartes rectangular coordinate system of a right-hand space by taking a relocation site of a distance meter as an original point and a magnetic north direction as the positive direction of the x-axis by means of a space ranging function of a laser or infrared distance meter; rotating the distance meter to enable a measured light beam to be irradiated to three non-colinear points of a structural surface to be measured, and respectively recording the vertical rotation angle, horizontal rotation angle and measuring distance of each measured light beam; and quantitatively describing the inclination state of the structural surface to be measured by utilizing the relationship between a spatial vector and a geometric projection, and calculating the inclination angle, inclination and trend of the structural surface. By using the method, the application restrict for the contact measurement of the traditional geological compass is broken, the measurement for the occurrence of a long-distance or difficultly-contact structural surface is realized, and the measurement errors caused by the magnetism of minerals are effectively avoided.

A process is provided for determining the distance between two devices by sending ranging packets between them. The local device sends a first ranging packet, which the remote device sends holds for a first hold time before sending a second ranging packet in return. The local device also sends a third ranging packet, which the remote device sends holds for a second hold time before sending a fourth ranging packet in return. If the second hold time is twice the first hold time, then the propagation time for signals between the two devices can be determined solely by time measurements made by the local device. For received signals, these time measurements can be adjusted to provide accurate time estimates for a direct line of sight signal, which corresponds to a shortest transmission distance between the two devices. The propagation time can then be used to determine distance between the devices.

The invention provides a mobile phone ranging system, and belongs to the field of mobile phone system processing. The mobile phone ranging system comnprises a camera lens, a charge coupled device (CCD), a CCD displacement driver, an image analysis module and a calculation module. The operating mechanism of the system comprises the following steps of: firstly, starting the camera lens; secondly, determining a main focusing point; thirdly, focusing automatically and outputting an image distance; and finally, calculating the distance of an object by using the calculation module according to the image distance and the focal distance of the lens. By using the mobile phone ranging system, the automatic ranging function can be realized by utilizing the conventional mobile phone device without adding hardware cost.

The invention discloses a night-vision device with ranging function, and belongs to the field of monitoring devices. The technical scheme is that: the night-vision device comprises a pulse laser and an ICCD camera with a gate, wherein the ICCD camera can realize range-gated imaging; a range-gated synchronous controller is arranged between the pulse laser and the ICCD camera; the range-gated synchronous controller can make pulses of the pulse laser and the ICCD camera correctly matched on time sequence, separate useful signals reflected by background radiation and an object due to back scattering in different ranges according to the time sequence, so that the useful signals reflected by the detected object reach the camera and are imaged just in the gate working time of the camera. The night-vision device has the advantage that: the night-vision device automatically measuring the range between the camera and the object through the pulse laser and the ICCD camera with the range-gated imaging function, and makes the monitoring more effective.

To provide synchronizing methods, optical switch modules, center devices, remote devices, optical access systems, optical access networks, programs, and recording media in the optical access network which can give the connection start time of the upstream optical switching element of the optical switch module. To the optical switch module, ranging functions are provided and the center device OLU carries out ranging of the optical switch module OSM as is the case of ranging of the remote device ONU. The center device OLU transmits the difference between roundtrip time of the remote device ONU and roundtrip time of optical switch module OSM, which is the result of these rangings, to the optical switch module OSM, and the optical switch module OSM can obtain the contact start time of the upstream optical switching element by calculating the contact start time using the difference.

The invention provides a satellite-ground combined carrier smoothing pseudo range ranging method, which can remarkably improve satellite ranging accuracy. The invention is realized by the following technical scheme: in a non-coherent mode, after receiving uplink signals of a ground station, the satellite performs despreading, demodulation and frame synchronization, and samples the uplink signals by using the downlink ranging information frames formed by the satellite, and transmits extracted ground station frame count, bit count, spread spectrum pseudo-code count, code phase and uplink Dopplervalue parameters to the ground station after packaging into downlink measuring frames directly; after receiving downlink ranging signals, the ground station performs dispreading, demodulation and frame synchronization so as to extract downlink measurement frame synchronization signals, implements a carrier phase smoothing pseudo range function through carrier phase and code phase measured on theground station, and utilizing uplink code phase and Doppler values sent by the satellite to complete on-satellite carrier phase smoothing pseudo range of satellite receiving signals on the ground; finally, the ground station uses the smoothed code phase to perform synthetical calculation so as to implement ranging.

An optical apparatus for ranging and communication in free space comprises a rangefinder comprising a device for transmitting an optical signal to a target and a device for receiving the signals backscattered by the target. A system for optical communication in free space comprises a device for transmitting an optical signal to a remote optical receiving device. The transmitting device of the rangefinder and transmitting device of the communication system is a transmitting device common to the rangefinder and communication system and transmitting pulses of peak power greater than 50 W and shape factor less than 0.01 or a modulated continuous signal of peak power less than 10 W and shape factor equal to approximately 0.5 and the apparatus comprises a supervisor controlling the common transmitting device according to two modes, the pulse mode to perform the ranging function, or the modulated continuous mode to perform the optical communication function.

The invention provides an onboard downward-looking 3D SAR sparse array antenna laying method. The method aims to solve the problems that according to onboard 3D SAR system antenna laying, a platform installation space is limited and a design method is complicated; according to the flight height of an aerial carrier, an observation area maximum height change range function, a radar system work wavelength and a resolution ratio in the array direction, antenna laying design is carried out. The method is simple in operation, free of complicated computation and capable of guaranteeing that a grating lobe of a target response function in the array direction of a system is controlled to be at a reasonable level.

Items are represented to a user through a user interface with each item having a respective perceivable range value and associated label by which the item can be addressed. To address a particular item, the user speaks its label at a loudness indicative of its perceived range. A loudness-to-range function of the interface determines on the basis of the loudness of the user input, a range gate expected to encompass the range value of the addressed item. A speech recogniser is used to recognise the spoken label and thus the addressed item, the label search space of the recogniser being restricted to exclude the labels of items having a range value outside of the determined range gate. In one embodiment, the user interface is an audio interface in which the items are represented in an audio field through corresponding synthesized sound sources, the depth at which each sound source is rendered in the audio field being the range value associated with the corresponding item.

The invention provides an electronic device with ranging function, comprising at least one laser transmitting tube, two image pickup units and a control unit, wherein a laser beam emitted by the laser transmitting tube forms a light spot on an obstacle; each image pickup unit is respectively used for an image, and the image comprises the image of the light spot; the control unit is used for controlling the start of the laser transmitting tube and the image pickup units and analyzing the image obtained by each image pickup unit so as to identify the light spot icon in each image, determine theposition of the light spot icon in each image, determine the vertical distance from the light spot icon to the lens axis of each image pickup unit according to the position of the light spot icon, calculate the distance of the obstacle, and carry out corresponding operation according to the execution distance of the obstacle. The invention also provides a corresponding ranging system and a corresponding ranging method.

The present invention provides a method and device for realizing frame zooming in a monitoring system. With the ranging function of the camera, the rotation angle and zoom factor of moving from the center point of the playback pane to the center point of the zoom area are calculated, and the data is calculated. This sends a rotation command and/or a zoom command to the pan/tilt, thereby accurately realizing the frame zoom function of the pan/tilt camera.

The invention relates to an environment compensation method for measurement employing a laser tracker, which belongs to the technical field of photoclectric engineering and is used for compensation because the laser tracker is easily influenced by environmental factors in the measuring process. The method comprises the following steps of: (1) splitting laser for compensation from the emitted dual-frequency laser of a built-in dual-frequency laser device of the laser tracker; (2) projecting the laser for compensation to a piece to be tested and reflecting with a pyramidal prism to form a compensation light path; (3) additionally arranging an interference component in the compensation light path so that the compensation light path has the dual-frequency laser interference ranging function; (4) additionally arranging a laser splitting element and a PSD (Position-Sensitive Detector) in the compensation light path so that the compensation light path has the PSD displacement measuring function; and (5) compensating a measuring result of the laser tracker in real time by using dual-frequency laser interference ranging data and PSD displacement measuring data. By means of the method disclosed by the invention, the problem of measurement accuracy decrease of the laser tracker which is influenced by environmental factors in the large-size and high-accuracy on-line measurement is solved, and meanwhile, the advantages of simple structure and easiness for implementation are achieved.

The invention discloses a device for changing a route range of a jogged positioning platform. The device is composed of a base, a variable magnification time lever, a composite parallel four-rod guiding mechanism and a movable platform. Two parallel grooves are arranged below the base and two piezoelectric ceramic drivers are respectively placed in the respective grooves; the variable magnification time lever is downwards arranged in the middle of the base; and output hinges arranged at the upper part of the variable magnification time lever are hinged with the middle parts of two parallel flexible hinge parts and respectively enable two input hinges of the lower part of the variable magnification time lever to be contacted with the two piezoelectric ceramic drivers through a pre-fastening screw. The variable magnification time lever is provided with a fixed hinge to be connected with the base; and the two input hinges can independently receive input displacements of the piezoelectricceramic drivers to transmit the amplified displacements to the movable platform, and an output displacement of the platform has two route ranges, so that a composite route range function with a smallroute and a high precision or low precision requirements and greater route requirements are realized.

The invention discloses an ATO (automatic train operation) velocity-measuring ranging system. In the system, an ATO system velocity-measuring ranging function is realized by calculating on the basis of ATP data and SRP velocity-measuring ranging unit data. The ATO system is only communicated with an ATP (automatic train protection) unit and an SRP velocity-measuring ranging unit, and connection with a speed sensor, a radar and a BTM processing unit is not needed. Under the condition of meeting the train control precision demand, the purpose of simple and clear structure is achieved. Besides, on the basis of the ATP velocity-measuring ranging data, the information of the SRP velocity-measuring ranging unit is combined by the ATO system, and the velocity-measuring ranging data is corrected, so that the accuracy of the velocity-measuring ranging data meets the train control requirement.

The invention relates to a variable-focus 3-D capsule endoscope system based on a liquid lens. Design is conducted by adding the liquid variable-focus lens to a capsule endoscope optical system, focusing of the system is achieved through zooming of the liquid lens, and therefore clear images of a shot target can be obtained at any position. Sequences of the obtained clear images are processed and calculated, more accurate three-dimensional information of the shot target is obtained, and therefore the 3-D imaging or three-dimensional ranging function is achieved for the shot object, and doctors can better judge diseased parts and lesion degrees. Clearer images of human body alimentary canals can be obtained, the calculation accuracy is improved, and the three-dimensional information of the shot target is more accurately obtained. The capsule endoscope diagnosis accuracy and the work efficiency of the doctors can be effectively improved.

The invention discloses an intelligent voice type guide blind robot control method and a control system thereof. With a YOLO neural network, detection and recognition of an object are realized to obtain obstacle category information; binocular calibration and three-dimensional matching are carried out on a binocular camera to realize a ranging function. On the basis of the espeak speech synthesis,voice broadcasting of the obtained obstacle category information as well as a distance between the obstacle and a robot and orientations of the obstacle and the robot is carried out to realize obstacle broadcasting. A near-infrared sensor is used for detecting an obstacle within a view field; a walking device is used for realizing walking and obstacle avoidance; information is transmitted with the user in a voice manner; and the sensory ability of the user to the ambient environment is enhanced. The recognition accuracy is high and the performance to the complex environment is robust. The accurate and intelligent voice broadcasting is realized; the object type in front of the blind user is warned and a shortest distance to the object is provided, so that the blind user can obtain the environment information accurately, the life quality is improved, and the living need of the blind user is met.

The invention relates to a close range real-time accurate positioning method integrating multiple algorithms. The method includes the steps that a comprehensive access base station is arranged under a mine, and comprehensive access base stations with the ultrasonic ranging function are arranged at key positions; the positions of the comprehensive access base stations are initialized through a ground control center; positioning labels send positioning data to the comprehensive access base stations; each comprehensive access base station calculates the distance d from the each positioning label to the comprehensive access base station; the figured-out distances together with Ids of the comprehensive access base stations and Ids of the positioning labels are transmitted to an intelligent heterogeneous internet of things gateway through the comprehensive access base stations; information data and position data of the positioning labels are transmitted to the ground control center; the ground control center filters and corrects the positions of the positioning labels to obtain precise position information. According to the method, the positions of the positioning labels can be precisely measured, positioning precision is improved, and cost is saved.

The invention relates to a distribution network cable hybrid direct distribution line fault ranging method based on line side direction traveling wave decomposition, which belongs to the technical field of power system relay protection. When single-phase grounding fault happens to the distribution network cable hybrid direct distribution line, a PCA-SVM is firstly adopted to recognize a line hybrid line fault section; line mode traveling wave is obtained according to fault travelling wave data acquired at a measurement end, the obtained line mode traveling wave is applied and according to line side voltage travelling wave and current travelling wave distribution in a fault region deduced by a Bergeron line transfer equation, the line side voltage travelling wave and the line side current travelling wave are subjected to line side direction traveling wave decomposition, direction travelling wave for line side distribution is acquired, positive travelling wave is used to multiply backward travelling wave, integration is carried out in two sequential time window lengths for building a ranging function, and finally, fault ranging is carried out according to traveling wave mutation distribution of the ranging function along a fault region line length range. After theoretical analysis and the simulation result, the method has good effects.

Embodiments of the present invention is directed to a method and system for use of ranging MW to reduce dual (MW/PIR) intrusion detector false alarms. A Doppler microwave system may be provided that is capable of detecting an object range and adjusting the sensitivity of the PIR detector to account for object size and range. Multiple range limited MW stages may be configured for different ranges to determine the general range of the moving object. Based on signal levels present on these MW stages, an approximate object range is determined. The sensitivity of the PIR is then adjusted based on a PIR sensitivity vs. object range function that is optimized to alarm on humans and ignore small animals and insects.

A reverse image device with a ranging function is composed of a luminous source, a lens group and a display, wherein the luminous source is arranged at the tail of an automobile and can project a ray which can generate a pattern on an object to be measured; the lens group is arranged at the tail of the automobile and is internally provided with a lens, a photo-sensitive component and a circuit board, the lens collects images at the rear part of the automobile to be projected on the photo-sensitive component, and the circuit board calculates the off-car distance between the object to be measured and the tail of the automobile based on the pattern compactness read by the photo-sensitive component; and the display is arranged in the automobile for a driver to view and is electrically connected with the lens group so as to enable the display to display the off-car distance between the image of the object to be measured and the object to be measured. By pattern compactness projected by the luminous source, the off-car distance of the object to be measured is calculated so as to avoid the driver from judging the off-car distance of the object to be measured by mistake; and the ray is invisible light, thus having no influence on coming vehicles or pedestrians at the back.

Embodiments of the present invention are directed to a method and system for use of ranging MW to decrease MW intrusion detector false alarms. A Doppler microwave system may be provided that is capable of detecting an object range and adjusting the sensitivity of an alarm stage of a MW detector to account for object size and range. Multiple range limited MW stages may be configured for different ranges to determine the general range of the moving object. Based on signal levels present on these MW stages, an approximate object range may be determined. The sensitivity of the MW alarm stage is then adjusted based on a MW alarm state sensitivity vs. object range function that is optimized to alarm on humans and ignore small animals and insects. The method and system may be used in detection systems incorporating a MW sensor.