61 results about "Reference distance" patented technology

A establishing method of a reconfigurable intelligent surface radio frequency model includes calculating a first power ratio between a first receiving antenna and a first transmitting antenna according to a first wireless transmission equation; calculating a second power ratio between a second receiving antenna and a second transmitting antenna according to a second wireless transmission equation, wherein a reconfigurable intelligent surface is disposed between the second transmitting antenna and the second receiving antenna, and separated from the second transmitting antenna by a reference distance; calculating the first power ratio, the second power ratio and a path loss corresponding to the reference distance to obtain a relay gain of the reconfigurable intelligent surface; and establishing the reconfigurable intelligent surface radio frequency model based on a loss correction value and the relay gain.

The invention provides a lifting sling balance control method, which comprises the following steps of: detecting the actual distance from two ends of a traveling cart mechanism to a cart traveling track in real time through a first sensor, comparing the actual distance with a reference distance in real time, and further judging whether the sling is in a horizontal state in real time; as the two ends of the traveling cart mechanism abut against the cart traveling track, a first difference value and a second difference value between the actual distance and the reference distance are calculated respectively, and the first difference value and the second difference value correspond to the difference value between the actual distance between the two ends of the traveling cart mechanism and the cart traveling track and the reference distance respectively. The inclination state of the lifting appliance is judged by judging whether the first difference value and the second difference value are equal or not and judging the sizes of the first difference value and the second difference value, then the offset distance of the lifting appliance is detected through the second sensor, the steel wire rope is wound and unwound through the lifting mechanism till the two ends of the lifting appliance recover the horizontal state, and therefore safety and stability in the lifting appliance operation process are guaranteed.

A method and apparatus for separating transmission channels of a DDMA-MIMO radar, a device, and a storage medium. The method comprises: dividing a Doppler frequency domain into N transmission channels according to the number M of transmitters comprised in a DDMA-MIMO radar (S110); establishing an initial correspondence between the M transmitters and any M transmission channels (S120); determining measured range-Doppler amplitude information and reference range-Doppler amplitude information corresponding to the N transmission channels (S130); determining correlation information between the measured range-Doppler amplitude information and the reference range-Doppler amplitude information (S140); and determining a target correspondence between each transmitter and transmission channel on the basis of the correlation information and the initial correspondence (S150).

The invention relates to a hole bottom sediment thickness adaptive direction measurement method for irregular hole shapes. The method comprises the following steps: acquiring hole wall images and vertical distance data in multiple directions; image preprocessing is carried out, hole wall feature points are extracted, three-dimensional coordinates are converted, a dynamic three-dimensional model is fitted, deformation grades are divided, and an inclination angle is determined; preferentially distributing detection points in a serious deformation area, calculating an optimal angle, monitoring by a gyroscope, correcting by an electromagnetic damper, adjusting by a servo motor, and ensuring that an included angle between a probe axis and a hole bottom tangent line is compliant; transmitting multi-frequency ultrasonic waves according to deformation grades, analyzing reflected signals through wavelet transformation, extracting sediment layering characteristics, and calculating the distance from a probe to a layering surface through speed correction; the reference distance is calculated based on the reference coordinates, the sediment total thickness and the dense layer thickness are finally obtained, and the measurement method which is adaptive to hole wall deformation, eliminates interference, dynamically adjusts detection parameters and is accurate in reference positioning can meet the high-precision requirement of engineering for sediment thickness and compactness quantification.

The application discloses a 4D video generation method fusing monocular vision and terrain elevation data, comprising the following steps: acquiring video frame images and corresponding camera pose data collected by a monocular camera; acquiring terrain elevation data of a target area, and constructing a three-dimensional elevation network model; based on the camera pose data, establishing a ray projection model for pixels in the video frame images, calculating the intersection of the rays and the three-dimensional grid model, and obtaining the reference distance from the monocular camera to the ground surface corresponding to the pixels; generating an initial relative depth map of the video frame images by using a depth estimation model; selecting high-confidence ground pixels from the video frame images as reference points, taking the reference distance corresponding to the reference points as the true value, and performing absolute scale correction on the initial relative depth map to obtain an absolute depth map; performing back projection calculation on the absolute depth map, the camera pose data and pixel color information to generate a three-dimensional point cloud, mapping the three-dimensional point cloud to a real geographic coordinate system, and generating 4D video data in time sequence.

Condition measuring device that measures the condition of a cutting tool (200) during a cutting operation, wherein the cutting tool (200) consists of a rotating body having one or more blade sections (202) and bringing each of the blade sections (202) into contact with a workpiece (W) during rotation in order to machine the workpiece (W), wherein the condition measuring device comprises: one or more measuring sections (101) attached to the blade section (202) or to a surrounding area of ​​the blade section to measure a condition of the blade section (202); an AD converter (103) attached to the cutting tool to obtain a measured value measured through each of the measuring sections at a predetermined sampling rate and to perform an AD conversion with respect to the measured value; a transmission section (105) which transmits the measured value from the A / D converter (103) using digital wireless communication each time the measured value is obtained; and a monitor device (120) which is provided outside the cutting tool, wherein the monitor device (120) comprises: a receiving section (122) that receives the measured value transmitted by the transmitting section (105); and a data management section (124) that causes a display section (126) to display the measured value, and a storage section (127) that causes the measured value to be stored each time the measured value is received by the receive section (122), wherein each of the measuring sections (101) comprises a strain gauge or a piezoelectric element, and the amplitudes of the measured values ​​are recorded by the strain gauge or the piezoelectric element from the chronological data of the measured values ​​received by the receiving section (122), and a difference is obtained between each of the recorded amplitudes and a reference value, and wherein the condition measuring device further comprises an abnormality detection section (125) which determines that an abnormality has occurred in the blade section (202) if the difference is greater than a reference distance value, and, when the presence of the abnormality is determined, displays information showing the occurrence of the abnormality on the display section (126).

The present disclosure relates to a pipeline leakage detection method and device, electronic equipment and storage medium, the method comprising: acquiring a first leakage signal of a pipeline under a first condition; generating a second leakage signal under a second condition based on the first leakage signal, the signal detection step length under the second condition being smaller than the signal detection step length of the first condition, the signal detection step length being a reference distance between a sensor and a leakage point; constructing a leakage detection model using the first leakage signal and the second leakage signal; and performing processing on the leakage signal using the leakage detection model to detect a leakage event. The embodiments of the present disclosure can improve the leakage detection accuracy.

The application discloses a kind of car position measurement method, device, equipment and storage medium, the mapping relationship of first reference distance, second reference distance and third reference distance is established in advance, in actual measurement process, the target distance corresponding to echo signal with better signal-to-noise ratio is used to find the corresponding second reference distance from the mapping relationship as the distance between car and shaft top, the car position measured by phase method is corrected, the cumulative error generated by phase ranging is eliminated, the accuracy of car position is improved, and then the safety is improved.

The application provides a radar target detection method, system, device and medium based on two-feature fusion, and belongs to the technical field of radar signal processing. The method comprises the following steps: constructing training data by using existing radar target detection data, extracting phase linearity based on a training data extraction process, and extracting the relative peak height of the Doppler spectrum by using a relative peak height extraction process; based on the phase linearity and the relative peak height, a linear dimension reduction method with compact distribution is used to obtain a fusion matrix of two features; reference distance unit data and to-be-detected distance unit data are obtained in real time, the phase linearity extraction process and the relative peak height extraction process are respectively performed, and the fusion matrix is used to generate fusion features; based on the fusion features, the parameters of a generalized extreme value distribution are estimated, a detection statistic is constructed, a preset false alarm probability is combined to calculate an adaptive threshold, the target is judged by comparing the detection statistic with the threshold, and the constant false alarm rate detection under clutter suppression is realized.

A detection device that fits a second connector provided on a tip of a cable and detects looseness at a connection portion between a first connector to which the cable is connected and the second connector includes a sensor that detects a distance to a tip face of the second connector in a sealed space formed in a state where the first connector and the second connector are fitted to each other; a controller that gives an output instruction to output a predetermined signal when the distance has changed by a predetermined threshold value or more from a reference distance, the reference distance being the distance at a predetermined reference time; and an output device that outputs the predetermined signal according to the output instruction.

The invention relates to a method for operating a distance determination system (10) in order to determine at least one distance (12) between a mobile unit (14) and a stationary unit (16), wherein - a first radio signal (46) is transmitted by the mobile unit and a first transmission value is recorded, - the first radio signal is received by the stationary unit and a first reception value is recorded, - a second radio signal (48) is transmitted by the stationary unit and a second transmission value is recorded, - the second radio signal is received by the mobile unit (14) and a second reception value is recorded, and - the distance (12) is determined by means of an evaluation unit (18). According to the invention, a monitoring unit (78, 80) generates a reference signal (82), feeds the reference signal to an antenna port (26, 40) of the transmit / receive unit (22), and records a reference transmission value, - the reference signal is received by the transmit / receive unit and a reference reception value is recorded, and - a reference distance (28) is determined by means of the evaluation unit and is compared with a predefined comparison value.

A method performed by an electronic device is provided. The method includes receiving, through a distance detection sensor, second signals in which a first signal transmitted through the distance detection sensor is reflected by an external object, identifying a distance from the external object based on at least a part of the second signals, obtaining a deviation information value for the second signals based on identifying that the distance is less than a reference distance, obtaining an image including a visual object corresponding to the external object through a first camera based on the deviation information value being greater than or equal to a reference value, and obtaining the image including the visual object corresponding to the external object through a second camera according to a camera switching, based on the deviation information value being less than the reference value.

The inspection method acquires the number of target pulses indicating the number of pulses output from a sensor during a predetermined reference distance of the vehicle, that is, the number of pulses corresponding to the rotation of the wheels of the vehicle, and compares the acquired number of target pulses with a predetermined reference pulse number to determine the rotation of the wheels of the vehicle. Thus, an abnormality related to the vehicle speed of the vehicle is determined.

The invention discloses a pile body perpendicularity real-time monitoring and intelligent deviation rectifying method and device in the piling process. The method comprises the steps that S1, before piling, a local coordinate system is established, a pile body is scanned through opposite lasers in the direction of each coordinate axis, and a reference distance is obtained; s2, in the piling process, laser is made to continuously irradiate the same height section of the pile body, the distance between each laser beam and the surface of the pile body is measured in real time, and four distance measurement values are obtained; s3, calculating real-time offsets in the directions of the two coordinate axes; s4, the real-time perpendicularity of the pile body is calculated, and the real-time perpendicularity is compared with a preset threshold value; and S5, when the real-time perpendicularity exceeds a preset threshold value, according to the direction and size of the real-time offset, a deviation correcting mechanism of the pile driver is driven to correct the posture of the pile body. The effect of measuring the perpendicularity in real time is achieved, the monitoring efficiency and the piling perpendicularity verification efficiency are greatly improved, and strong power is provided for rapid promotion of construction.

In the disclosed component assembly system for a substrate processing apparatus, a robot transports a component to a designated position in the substrate processing apparatus. The image sensor acquires an image of an upper surface of a substrate support portion and a component of a semiconductor manufacturing apparatus. The measuring unit obtains at least four distances by obtaining the distance between each of at least two measuring points in the component and each of at least two reference points in the upper surface of the substrate support unit from the image. The control unit controls the robot to convey the component to a designated position on the basis of a result of comparison between the at least four distances and the at least four reference distances. The at least four reference distances are the at least four distances when the component is conveyed to the designated position and are set in advance.

An automatic wear compensation system for a lower plate and a wafer polishing apparatus having the system are disclosed. This automatic wear compensation system reduces wafer misloading and errors in wafer loading inspection that occur when the distance between the lower plate and the transport robot gradually increases due to wear of the lower plate during the polishing process. The automatic wear compensation system includes an ultrasonic sensor mounted on the transport robot; a gripper located directly below the ultrasonic sensor and mounted on the lower plate; a controller configured to acquire measured distance information by measuring the distance from the gripper using the ultrasonic sensor, compare the measured distance information with the set reference distance information, and generate an adjustment control signal; and a driver configured to automatically adjust the Z-axis position of the transport robot based on the adjustment control signal sent by the controller.

The application discloses a path optimization system and method for an intelligent stringing robot, and relates to the technical field of artificial intelligence.The application realizes intelligent stringing robot path optimization through multi-dimensional innovation.Work sub-regions are divided according to power and dynamically matched with work ranges, device endurance and task requirements are accurately adapted, multi-machine collaborative scheduling efficiency is improved, and efficient execution of stringing tasks is ensured.A tilt detection system is constructed by means of vertical marker light and auxiliary analysis light, light projection deviation is quantified by combining image sensors, the tilt angle of the work area is accurately calculated, and reliable data is provided for path optimization.With the aid of tilt data interaction between multiple machines and the reference distance proportion compensation mechanism, the stringing path is dynamically corrected at the boundary of adjacent sub-regions, error accumulation caused by terrain differences is eliminated, and cable laying accuracy is ensured.Error analysis sets are established to realize data tracing and provide systematic support for construction process optimization, and work performance and construction quality are comprehensively improved.

The goal is to enable even someone unfamiliar with camera specifications to appropriately photograph structural defects such as narrow cracks. [Solution] An inspection device for inspecting the condition of a structure comprises: an imaging unit that photographs at least a part of the structure and generates an image; a distance measuring unit that measures the distance of at least a part of the structure and generates depth data; a storage unit that stores a reference distance, which is the distance from the imaging unit, that can image deformation of a predetermined width in the structure with a predetermined number of pixels or more; and a control unit that identifies the measured distance to the object to be photographed on the structure based on the depth data, and if the measured distance is greater than the reference distance, it makes a predetermined first notification.

Method for improving the quality of a two-dimensional image of a three-dimensional object, and corresponding data processing system and device. The present invention relates to a method (100) for improving the quality of a two-dimensional image (IM_in) of a three-dimensional object (15) for the purpose of positioning a defect (12) comprising supplying as input an initial two-dimensional image (IM_in) of the object (15), of a minimum distance (Dmin(Δi)) and of a maximum distance (Dmax(Δi)) between the object (15) and a source (25) along at least one projection direction (Δi);for a plurality of reference distances (Dref,i,j) relative to the source (25) along the projection direction (Δi), the determination (110) of at least one respective geometric point spreading function (PSFi,j) associated with a representative model of the radiation source (25) for a reference point virtually positioned in the object (15) at said reference distance (Dref,i,j) along the projection direction (Δi); the generation (120) of respective two-dimensional deconvolved images (IM_deconv,i,j) of the initial image based on the respective geometric point spreading function (PSFi,j); and, as output, the provision of a two-dimensional final image (IM_fin) selected from the generated images and / or the respective reference distance (Dref,fin) associated with the final image. Figure for the abstract: 4;

This technology provides the ability to appropriately detect relative positional misalignment between the loading / unloading device and the rack. [Solution] The automated warehouse 1 according to the present invention comprises a rack 11 on which a reflector 12 is provided, an loading / unloading device 13 that is movable relative to the rack and performs loading / unloading operations, and a control device 14. The loading / unloading device comprises a laser and a light detection unit. The control device is capable of detecting reflected light of laser light emitted from the laser using the light detection unit. Markers are provided on the reflector. During initial setup, the position of the loading / unloading device where a predetermined position on the reflector of the rack and the irradiation position of the laser light overlap is registered as a reference position, and the distance from the predetermined position to the markers is registered as a reference distance. At any time of subsequent use, the loading / unloading device is moved so that the irradiation position of the laser light and the markers overlap, and the amount of positional displacement of the rack is calculated based on the distance the loading / unloading device moves during that time.

Microphone array calibration method and apparatus, a telephone headset, a storage medium and a computer program product are provided. The method includes: when detecting that a position at which a microphone boom is located is deflected relative to pre-configured reference position, determining target distance between each microphone in a microphone array and a mouth, the microphone array being configured to collect a sound from the mouth and installed in the microphone boom; in a case where the microphone boom is located at the reference position, obtaining reference distance between each microphone and the mouth and reference value for calibration parameter used for calibrating each microphone; determining target value for calibration parameter corresponding to each microphone based on a difference between the target distance and the reference distance and the reference value; and calibrating the microphone array based on target value for calibration parameter corresponding to each microphone.

A monitoring device has a processor configured to determine whether a first moving object and a second moving object in a predetermined area around a host vehicle are present, set a first detection area for the first moving object and a second detection area for the second moving object, determine whether an obstacle which interrupts detection of the second moving object in the first detection area and interrupts detection of the first moving object in the second detection area is present, determine whether the first and second moving objects will approach to a predetermined reference distance in a state where detection of the second moving object in the first detection area is interrupted by the obstacle and detection of the first moving object in the second detection area is interrupted by the obstacle, and decide to notify the first and the second moving object of a warning.

The application discloses a kind of multi-modal video content retrieval methods, equipment and medium based on lens frame sampling.The method comprises the following steps: obtaining original video file, and the original video file is split, and each video shot is obtained;At least two kinds of representation vectors of each video shot are determined respectively, and each representation vector and the metadata of each video shot are stored in target database, and the target video database is obtained;The metadata of each video shot includes: identification information or timestamp information;In response to the input instruction of target retrieval content, the target retrieval content is represented by vector, and the target retrieval vector is obtained;The reference distance of target retrieval vector and each representation vector stored in video database is determined, and the preselected retrieval score is determined based on target weight;Each preselected retrieval score is screened, target video shot is determined, and target video shot is displayed.The scheme of the application can quickly and accurately retrieve relevant video content.

Embodiments of the application disclose a double-sided component layout method and device, electronic equipment and a storage medium. The method comprises: determining a target angle range according to a reference angle of a target site and first information; determining a target distance range according to a reference distance of the target site and second information; determining a target height range according to a reference height of the target site and third information; and determining a target angle, a target distance and a target height of the double-sided component layout based on the target angle range, the target distance range, the target height range and a pre-established economic calculation model. The technical scheme of the embodiments of the application achieves the technical effect of quickly and accurately determining the parameters of the double-sided component layout.

This invention relates to video surveillance technology, providing a method, apparatus, electronic device, and computer storage medium for detecting moving objects. The method includes: acquiring the pixel displacement of a target object between two video frames in a video to be detected; performing target detection on any video frame between the two frames to obtain distance perception information of the target object; adjusting a preset displacement parameter based on the distance perception information to obtain an adjustment threshold, wherein the preset displacement parameter represents the displacement threshold when the distance between the target object and the shooting device is a preset reference distance; and detecting whether the target object is a moving object based on the pixel displacement and the adjustment threshold. This invention can achieve the expected accuracy in motion detection of target objects at different shooting distances.

The invention discloses a method and device for calculating the distance between RFID tags in a passenger cabin of an airplane. The method comprises the following steps: S1, collecting a plurality of RSSI values in unit time, and arranging and numbering the RSSI values according to a time sequence; s2, calculating a time attenuation weight according to the collection time of the RSSI value and the current time; s3, calculating the weight of hit times per unit time according to the RSSI value; s4, calculating a multi-path signal attenuation factor according to the RSSI fluctuation amplitude in unit time; s5, calculating a comprehensive weight according to the time attenuation weight, the unit time hit frequency weight and the multi-path signal attenuation factor; and S6, calculating the distance of the Internet of Things according to the comprehensive weighting, the attenuation factor and the reference distance. By collecting a plurality of RSSI values and combining a time attenuation weight, a hit frequency weight and a multi-path signal attenuation factor, instability caused by instantaneous signal fluctuation is weakened, and great jitter of the RSSI caused by reflection, personnel movement and the like is avoided.

Antenna device, comprising: a plurality of transmitting antennas (21 to 23, 21a to 23a) aligned at a reference distance along an orientation direction, wherein the reference distance and the orientation direction are specified; a first receiving antenna (26, 26a) with an aperture width in the direction of orientation that is fixed to a first width that is smaller than the reference distance; and a plurality of second receiving antennas (24, 25, 24a, 25a), each having an aperture width in the direction of orientation which is fixed to a second width which is less than or equal to the first width, wherein the plurality of second receiving antennas is aligned at a distance which is less than the reference distance along the direction of orientation, wherein a distance along the direction of alignment between a phase center of the first receiving antenna and a phase center of a second receiving antenna, which is closest to the first receiving antenna among the plurality of second receiving antennas, is fixed to a length greater than or equal to a value obtained by multiplying the reference distance by a value obtained by subtracting 1 from the total number of transmitting antennas.

The present disclosure relates to a method of operating an SPM system including a landing procedure. The landing procedure comprises a first landing stage including a first translation over a first actuation distance by a coarse translation means to bring a probe tip held by an SPM head from an initial separation from a substrate to be probed to a second, more proximal, separation as defined by a characteristic transitional response of the probe tip in proximity to the substrate. Following the first stage a second translation is applied, over a second actuation distance by a fine translation means under feedback control to bring the probe tip to a working separation. Prior to applying the first (coarse) actuation distance an initial optical distance is determined which is indicative of the initial separation, using a detector, preferably a mark sensor. The measured initial optical distance is related to a reference distance so as to determine a deviation. The first actuation distance corresponds the reference distance and the deviation. The disclosure also relates to an SPM system and software product arranged to implement the landing method.

The invention relates to a power distribution network fault rapid positioning method, device and equipment based on a distributed power supply. The method comprises the following steps: determining a plurality of active sub-regions in a dynamic topology model of a power distribution network by taking a distributed power supply grid-connected point and a main network contact node as demarcation points, and determining a target sub-region according to normalized electrical quantity data and transient electrical quantity data; determining a fault line segment according to the fault feature parameters of the target sub-region and a preset fusion positioning criterion; determining a fault local interval in the fault line segment according to the line parameters of the fault line segment and the transient electrical quantity data of the fault line segment; and determining a reference distance between the fault point and the target measurement node according to the transient electrical quantity data and the line parameters in the dynamic topology model, and determining the position of the fault point in the fault local interval according to the reference distance. The method adapts to a complex active scene after the distributed power supply is connected, and achieves the quick, accurate and reliable positioning of the fault of the power distribution network.