46results about How to "Convenient ranging" patented technology

System and methods are disclosed to use ultrasonic (US) and WiFi signals to improve range determination between devices in WiFi-based position or range estimation systems. Such systems may leverage existing WiFi infrastructure and US-capable sensors such as speakers and microphones as US transducers. US ranging between devices may be performed using round-trip time (RTT) or one-way measurements. To enable US ranging between a device and multiple US transmitters simultaneously, the US signal from each US transmitters or from the device may be modulated with a unique pseudo-random number (PRN) using direct sequence spread spectrum (DSSS). The transmission of US signals may be synchronized with the transmission of WiFi beacons which may contain data fields that contain the PRN sequence used to modulate the synchronous US signal. In RTT ranging, a receiving device receiving an US signal transmission may respond with its own PRN-modulated US signal synchronized to its WiFi beacon.

The invention discloses a dynamic positioning method and device based on UWB and laser ranging combination and belongs to dynamic positioning methods and devices. The dynamic positioning device comprises an ultra-wide band (UWB) wireless communication sensors, a UWB positioning label, laser ranging sensors, an upper computer and a POE interchanger. An ultra-wide band (UWB) wireless communication sensor station is arranged in an area to be detected, the laser ranging sensors are installed on and fixed to the ultra-wide band (UWB) wireless communication sensors, the UWB positioning label is fixed to a target to be detected, and the ultra-wide band (UWB) wireless communication sensors and the laser ranging sensors are connected with the upper computer through the POE interchanger. According to the dynamic positioning method and device based on the UWB and laser ranging combination, the laser ranging sensors are arranged on the ultra-wide band (UWB) wireless communication sensors respectively, so that the relative distance between every two adjacent ultra-wide band (UWB) wireless communication sensors is obtained, in this way, the coordinates of the ultra-wide band (UWB) wireless communication sensors can be re-determined or corrected after the ultra-wide band (UWB) wireless communication sensors are moved, and thus the requirement for dynamic positioning is met. The dynamic positioning method and device based on the UWB and laser ranging combination have the advantages that the dynamic positioning method based on the UWB and laser ranging combination is adopted, positioning is accurate, safety and reliability are guaranteed, installation is easy, and operation is convenient.

The invention discloses an effective method for accurately detecting multiple targets by an automobile blind zone monitoring radar. Aiming at the distance speed coupling problem of frequency modulated continuous wave (FMCW) signals with single frequency modulation slope, the invention provides FMCW radar emitting signals with variable frequency modulation slope for accurately detecting real targets on the basis of variable-period FMCW signals. Aiming at the measurement precision limitation problem during fast fourier transform (FFT) difference frequency signal analysis, different distances and speed errors are obtained by time domain taking and frequency domain interpolating methods according to different target distances. When targets are in a remote distance, rough distance and speed information is obtained only through FFT analysis; and for targets in middle distance and short distance, traffic accidents can more easily occur, so the time domain taking and frequency domain interpolating methods are used for measuring more precise distance and speed. The effective method can be used for the multi-target detection of the automobile blind zone monitoring radar in the road traffic safety field.

The invention provides a tree obstacle measurement system and a method used for an overhead transmission line. The system comprises a multi-rotor flight device and a distance measurement device which is installed right below the multi-rotor flight device. The multi-rotor flight device is used for carrying the distance measurement device to fly to the place above a tree and to stop flight in a position which is equal to the overhead transmission line. The horizontal distance between the multi-motor flight device and the overhead transmission line is a preset safe distance. The overhead transmission line is above the tree. The distance measurement device is used for measuring the vertical distance between the multi-rotor flight device and the tree below. According to the invention, the tree obstacle measurement system can be used for carrying out tree obstacle measurement without power cut and working at a high place; the tree obstacle clearance distance can be safely, quickly and conveniently measured; tree obstacle information can be time and precisely grasped; and safe and reliable circuit operation is ensured.

A range resistor, for deployment with a low voltage AC measuring instrument as a voltage range multiplying attenuator, provides increased accuracy in the measurement of high AC voltages at frequencies up to 1 MHz, particularly when large attenuation ratios are needed. Passive guarding and neutralizing structure permits the use of higher value resistors for a given frequency response accuracy and an intrinsically lower input capacitance than is obtainable with conventional structure. Very low drift and voltage coefficients are achieved by a coordinated thermal design. Applications include high accuracy voltage measurement in the 10 to 1000 volt range with low input signal current when attenuation is resistively scaled to match the operating input level of the measuring device to be used, typically a thermocouple and / or digital or analog precision voltmeter.

The invention discloses an unmanned aerial vehicle autonomous counter-reconnaissance and enemy attack avoidance method, which comprises the steps of constructing a simulator based on Unity 3D, and constructing a battle scene of attacks of both enemy and my parties; performing limited round confrontation with a small number of opponents written according to rules through a reserved human player interface of the simulator, and collecting sample data of a solution for the unmanned aerial vehicle to avoid enemy counter-reconnaissance and attack; learning by utilizing the collected escape data of the human player, and learning through imitation learning in reinforcement learning to obtain a pre-training model; based on the pre-training model, realizing escape ability learning in the simulator through a reinforcement learning algorithm PPO; and testing the trained unmanned aerial vehicle avoidance reconnaissance and attack model and a human player, and migrating the model to a real environment. The unmanned aerial vehicle autonomous attack avoidance solution provided by the invention is of great application significance in a real scene, can train a good unmanned aerial vehicle attack avoidance strategy on the premise of low cost, and can be practically applied to the field of unmanned aerial vehicle flight control.

The invention discloses a multiple-track direct-supply traction network fault location method, which comprises the following steps: establishing a setting value area in a substation feeder protectiondevice, and inputting setting valves according to traction network line parameters; and cooperating with a substation feeder protection function to realize fault location. The beneficial effects are that the method solves the problem of influence of uplink / downlink mutual reactance of the multiple-track direct-supply traction network on reactance-method fault location and realizes accurate calculation of fault distance of the multiple-track direct-supply traction network; the method can obtain accurate fault distance for both the multiple-track direct-supply traction network with uniformly-distributed line parameters and the multiple-track direct-supply traction network with non-uniformly-distributed line parameters; the method can realize fault location by adding a corresponding softwarefunction in the substation feeder protection device without need of a special fault location device, and has the advantages of low cost, simple realization and accurate distance measurement and the like; and through cooperation of the fault location function and a protection function, fault location of the multiple-track direct-supply traction network under various fault conditions is realized.

The invention provides a handheld laser range finder. The handheld laser range finder comprises a shell, a control circuit board, a first laser indicator light, a second laser indicator light and / or a third laser indictor light, and a fourth laser indicator light, wherein the control circuit board is arranged in the shell, the first laser indicator light, the second laser indicator light and / or the third laser indictor light and the fourth laser indicator light are arranged on the shell, a calculation processing module, a laser transmitting module, a laser receiving module and a display module are arranged on the control circuit board, the first laser indicator light, the second laser indicator light, the third laser indictor light and the fourth laser indicator light are controlled by the laser transmitting module to transmit measurement light signals to an object to be measured, the reflection light signal of the object to be measured is received through the laser receiving module, and the width distance or the height distance of the object to be measured is obtained through calculation conducted by the calculation processing module according to the measurement light signals and the reflection light signal and is displayed through the display module. According to the handheld laser range finder, distance measurement can be conducted anytime and anywhere extremely conveniently, and the accuracy and the effectiveness of laser ranging are improved.

This invention provides nanocrystals or polymer doped nanocrystals of hydrophobic organic fluorescent dyes as stable dispersions in an aqueous system. The dispersions can be prepared without stabilizers such as surfactants and the like. The aqueous dispersions of the nanocrystals or the polymer doped nanocrystals can be used for bioimaging.

The invention discloses a centering and leveling device for engineering surveying. The centering and leveling device comprises a mounting box. An adjusting mechanism is mounted at the top of the mounting box. A laser range finder is mounted on the adjusting mechanism. A distance measuring box is mounted at the bottom end of the mounting box. The center of the bottom end of the distance measuring box is hinged to one end of a supporting rod. The other end of the supporting rod is hinged to the center of the top of the leveling box. A water tank is arranged in the leveling box. The water tank isfixed at the inner bottom end of the leveling box through a mounting base, and a horizontal calibration mechanism is arranged between the leveling box and the mounting box. The device is convenient to use, high in horizontal calibration efficiency and accurate in distance measurement.

A paintball shooting range includes a housing, a plurality of shooting booths each set with a paintball marker and located at a first end of the housing, a control area located at the first end of the housing and shielded with paintball-proof means, a target area set with targets and located at a second end opposite to the first end of the housing, and at least one of: (1) maker restraining means for mechanically restraining the movement of the paintball marker; (2) paintball dispensing means for selectively and automatically dispensing paintballs to the paintball marker; and (3) cleaning means for automatically cleaning at least the target area. In addition, a trailer may constitutes the housing and a truck for transporting the trailer.

The invention discloses a transparent sliding block type movable scaleplate animation light table. The transparent sliding block type movable scaleplate animation light table comprises outer frames, a transverse scaleplate, a longitudinal scaleplate, a sliding block with holes, connecting pieces, a table top and a table body. The sliding block and the scaleplates are made of transparent materials, and grooves are formed in the sliding block and correspond to the transverse scaleplate and the longitudinal scaleplate in width. Round holes are formed in the sliding block, the thickness of the positions of the round holes is smaller than that of the other positions of the sliding block, and transverse and longitudinal scale lines are designed in the centers of the round holes. The outer frames are fixed to the four edges of the table top to serve as running tracks of the transverse scaleplate and the longitudinal scaleplate, the sliding block is mounted at the intersection of the transverse scaleplate and the longitudinal scaleplate through the grooves, the sliding block moves to drive the transverse scaleplate and the longitudinal scaleplate to move freely, the scaleplate scales to which the transverse and longitudinal scale lines at the round holes in the sliding block correspond are coordinate values which the round holes indicate, and pen tips of drawing tools are inserted into the round holes so as to complete alignment and distance measurement. By means of the transparent sliding block type movable scaleplate animation light table, alignment and distance measurement can be achieved scientifically at a time, the problems of errors of traditional visual inspection methods, reduced efficiency caused by repeated alignment and the like are avoided, and the drawing efficiency and accuracy are greatly improved.

The invention relates to a highway bridge construction supervision reinforcing steel bar spacing detection device, and relates to the technical field of construction supervision auxiliary tools. The highway bridge construction supervision reinforcing steel bar spacing detection device comprises two lantern rings, a measuring mechanism is arranged between the two lantern rings, the lantern rings are used for being detachably connected to reinforcing steel bars, the lantern rings are used for rotating on the reinforcing steel bars, and the measuring mechanism is used for measuring the spacing between the two lantern rings. The measuring mechanism comprises a frame body, a rod body and a sliding block. The sliding block is connected to the frame body in a sliding mode, the sliding direction of the sliding block is the length direction of the frame body, the rod body is connected to the sliding block, the frame body is parallel to the length direction of the rod body, one end of the frame body is connected with a lantern ring, and a limiting mechanism is arranged on the measuring mechanism and used for enabling the sliding block to slide in one direction. The device has the effect of improving the accuracy of measuring the distance between the steel bars.

The invention discloses a power transmission line intelligent video distance measurement method. The specific distance and the angle between two cameras arrange at the front end at an interval are determined, wherein an intersection of an object whose distance needs to be measured exists in images of the two cameras; video images are collected by means of the cameras at the front end; one camera decompresses the collected video images and decomposes the video images into YUV pictures; the picture in one frame and the picture in the preceding frame are compared, background environment is updated in real time by means of self-learning, and a target object is eliminated from the background environment; pixel points of the eliminated target object in the cameras are calculated, and the distance of the target object is determined according to the position of the intersection of the object whose distance needs to be measured in the two images and the angles of the cameras. By means of the method, the distance of the target object close to power facilities can be measured conveniently in time, and safe operation of the power facilities is guaranteed.

The invention discloses a method for improving fault location precision of a traveling wave method, and particularly relates to a method for accurately locating a long line fault of a power system through a double-end traveling wave method. According to the method, a line fault measuring instrument is arranged on each of two sections of a long line, relative time during a fault is extracted by using a traveling wave method; the time synchronization and time accuracy of the two fault measuring instruments are required to be 1 microsecond when the two fault measuring instruments pass through optical fibers, when a fault occurs, the two fault measuring instruments determine the time when fault point traveling waves are transmitted to the measuring instrument on the same side by extracting thecharacteristic values of the fault traveling waves, and the distance of a fault point is calculated through the time difference of the two measuring instruments.

The embodiment of the invention provides an image correction processing method and device, and the method comprises the steps: calculating an image view angle corresponding to each image point in a to-be-processed image, and correcting image points, with the image view angles being smaller than or equal to a preset view angle, in the to-be-processed image through a first distortion sub-model; according to the invention, correcting the image points with the image visual angles greater than the preset visual angle by using the second distortion sub-model, so that the image points with differentdistortion degrees can be accurately corrected by using different distortion models, and the problem of inaccurate correction caused by correction of the image points by using the same internal reference distortion model is effectively reduced; and applications such as distance measurement or detection of visual tasks are facilitated.

The invention discloses a pure mechanical type three-dial kilometer metering car for distance measurement. The pure mechanical type three-dial kilometer metering car is characterized in that a drive shaft, a driven shaft, a first transmission shaft, a second transmission shaft, a third transmission shaft, a fourth transmission shaft and a fifth transmission shaft are mounted on a left side plate and a right side plate through bearings and are fixed on a bottom plate; drive wheels are arranged at two ends of the drive shaft, and driven wheels 7 are arranged at two ends of the driven shaft; a group of mutually matched gears is arranged on the drive shaft, the driven shaft and the transmission shafts; a handrail is arranged on the bottom plate; a millimeter dial, a decimeter dial, a meter dial, a millimeter pointer, a decimeter pointer and a meter pointer are arranged on the left side plate, the millimeter pointer is connected with the first transmission shaft, the decimeter pointer is connected with the second transmission shaft, and the meter pointer is connected with the third transmission shaft. The kilometer metering car is compact in structure and accurate in reading and can set a distance between any two points within 6 meters and ensure that the distance is linear.

The invention discloses a submerged plant transplanting device. The submerged plant transplanting device comprises a seedling storage cabin, a seedling conveying assembly, a transplanting assembly and a control system, and seedlings in the seedling storage cabin can be conveyed into a seedling receiving hopper through a conveying belt; a plurality of ditching teeth can be gathered and unfolded through the extension and retraction of a second telescopic cylinder; and an underwater distance measuring sensor in the control system is used for measuring the depth from the ditching teeth to the water bottom. The seedling storage cabin and the conveying belt are arranged on a working ship, and the seedlings in the seedling storage cabin can be conveyed into the seedling receiving hopper through the conveying belt; and the seedling receiving hopper is connected with a conveying pipe, a sleeve sleeves the conveying pipe, a connecting pipe sleeves the sleeve, and the ditching teeth are arranged at one end of the connecting pipe. The submerged plant transplanting device can perform reliable rice transplanting operation on the water bottom surface, the rice transplanting efficiency is high, the rice transplanting effect is good, most of the whole rice transplanting process is mechanized, and the labor cost is reduced.

The invention discloses a big-lamp steering system of biological information, which comprises the following parts: big-lamp steering device, sensor and vehicle-carrying computer, wherein the big-lamp steering device is controlled by computer, which monitors the driver head movement; the output end of sensor connects the input end of vehicle-carrying computer, which receives the signal to dispose. The invention can enlarge the eyesight for driver.

According to t a wireless network topology discovery method combining neighbor discovery and a breadth-first algorithm provided by the invention, neighbor discovery is used as a basic function of topology discovery, calling is carried out in a command triggering mode, the scheduling logic is clear, and the response speed is high; a breadth-first scheduling mode is adopted, network collision only occurs in the neighbor discovery process, and a neighbor discovery mechanism with low conflict probability determines the low conflict probability characteristic of network topology discovery; multi-hop routing is built based on a neighbor table, so the method is not limited by other routing functions, and is not influenced by a carrier sensing conflict avoiding mechanism; topology discovery scheduling is carried out by adopting an arrangement mode of the topology discovery list, so that the topology discovery process and the topology discovery list updating process are in low coupling, and multi-algorithm expansion of the topology discovery scheduling mode is easy to realize.

The invention provides a distance measuring method based on a cell phone and the cell phone thereof. The distance measuring method comprises steps that S1, a measurement starting signal is input in an input module; S2, a central processor is used to receive an acceleration transducer signal at a certain interval, and is used to calculate the X axis total displacement component and / or the Y axis total displacement component and / or the Z axis total displacement of the cell phone component in the time; S3, a measurement ending signal is input in the input module; S4, the final displacement of the cell phone is calculated by the central processor, and is output to a display module for display. The distance measuring method is advantageous in that by using the cell phone to realize the distance measurement, operation is simple; the cell phone is portable, and can be used for the distance measurement conveniently and quickly, and is not limited by time and places, and therefore a linear distance, a horizontal distance, and a curve length can be measured, and an application range is wide.

The invention relates to a ground detection robot which comprises a carrier (1), a data acquisition module (2), a sensing module and a control system (4), the carrier (1) comprises a frame vehicle body (11) and a walking mechanism (12), and the data acquisition module (2) and the sensing module are both arranged on the carrier (1). According to the invention, integrated development of artificial intelligence and metering services can be realized.

The invention discloses a multiple-track direct-supply traction network fault location method, which comprises the following steps: establishing a setting value area in a substation feeder protectiondevice, and inputting setting valves according to traction network line parameters; and cooperating with a substation feeder protection function to realize fault location. The beneficial effects are that the method solves the problem of influence of uplink / downlink mutual reactance of the multiple-track direct-supply traction network on reactance-method fault location and realizes accurate calculation of fault distance of the multiple-track direct-supply traction network; the method can obtain accurate fault distance for both the multiple-track direct-supply traction network with uniformly-distributed line parameters and the multiple-track direct-supply traction network with non-uniformly-distributed line parameters; the method can realize fault location by adding a corresponding softwarefunction in the substation feeder protection device without need of a special fault location device, and has the advantages of low cost, simple realization and accurate distance measurement and the like; and through cooperation of the fault location function and a protection function, fault location of the multiple-track direct-supply traction network under various fault conditions is realized.

The invention discloses a three-dimensional range finder which comprises a housing and a chassis supporting the housing, wherein the housing can coaxially rotate on the chassis; the chassis is provided with a horizontal dial; an aligner is arranged in the center of the bottom surface of the chassis; the housing is internally provided with a processor, a ranging module, an input module, an output module and a leveling device; the processor processes data of the ranging module according to an instruction of the input module, and transmits the processed data to the output module; the ranging module comprises a first ranging device, a second ranging device and a third ranging device; and the housing is further internally provided with a first ray generator and a second ray generator. The three-dimensional range finder can independently measure evenness of an inside ceiling panel and a wall of a to-be-measured housing building, is simple to operate and precise in measuring, and reduces the labor intensity of an operator greatly.

The invention discloses an intelligent pipeline detecting and monitoring device, which comprises an information acquisition terminal used for acquiring image information and distance information and adisplay control terminal used for displaying the image information. The intelligent pipeline detecting and monitoring device realizes monitoring for the internal environment of a pipeline and measurement for the distance of a target object through the information acquisition terminal and the display control terminal, and enables the measurement data to be superimposed in a video image, thereby enabling the staff to know conditions inside the pipeline more efficiently and more conveniently so as to be more conducive to distance measurement for the target object.

The invention discloses a seedling transplanting device for submerged plants, comprising: a seedling storage cabin, a seedling conveying assembly, a seedling transplanting assembly and a control system. It can be gathered and unfolded through the expansion and contraction of the telescopic cylinder two; the underwater ranging sensor in the control system is used to measure the depth of the ditching teeth from the bottom of the water. In the present invention, a seedling storage cabin and a conveyor belt are arranged on the workboat, and the seedlings in the seedling storage cabin can be transferred to the seedling receiving bucket through the conveyor belt; The upper sleeve is provided with a connecting pipe, and one end of the connecting pipe is provided with groove teeth. This setting enables the rice transplanting device to perform reliable rice transplanting operations on the water bottom, with high rice transplanting efficiency and good rice transplanting effect. Most of the whole rice transplanting process is mechanized, reducing labor costs.

The invention discloses a tomato picking method and system of a binocular robot based on a YOLOv4 algorithm, and relates to the technical field of intelligent crop picking. The method comprises the following steps: establishing a sample data set of a plurality of occlusion degree categories; lightweight processing is carried out on the YOLOv4 algorithm, model training is carried out on the sample data set, and a target detection model is constructed; the parameters of the binocular camera are associated with the YOLOv4 algorithm; collecting and importing real-time tomato picking data into the target detection model through a binocular camera of the binocular robot, and generating tomato identification and positioning information; position information of a mechanical arm of the binocular robot is obtained, and grabbing track planning information is generated; and controlling the binocular robot to grab the target tomato. According to the method, lightweight processing is carried out on the YOLOv4 algorithm, a binocular vision technology is combined, and mature tomato fruits with different shielding degrees are divided, identified and positioned, so that the picking accuracy is ensured.

The invention discloses a device for automatically identifying and automatically numbering road surface manhole covers, which includes a machine base, a machine cover and a battery box, the top of the machine base is equipped with a battery box, and the top of the battery box is installed through a second bracket There is an organic cover, and support rods are uniformly installed on the outer wall of the base, and the tops of the support rods are equipped with fixing seats, and the center of the inside of the fixing seats is equipped with a motor, and the top of the seats is also equipped with flying paddles. The center of the bottom end of the seat is provided with a fixed plate through the second spring, and the central position of the bottom end of the fixed plate is detachably installed with a camera through a fixing bolt. In the present invention, by installing an organic base, a machine cover and a battery box, the bottoms of the fixed plates at both ends of the camera are equipped with high-precision infrared ranging sensors, which facilitates the device to measure the distance and depth of the recorded manhole cover, and facilitates the manager to predict whether the There is a need for maintenance, which is convenient for the management and maintenance of the city.

The purpose of the present invention is to provide technology with which the distance to even a distant object can be accurately measured when using structured light to acquire the distance to the object. An image capturing device according to the present invention changes at least one among the optical density of structured light and the pattern size of structured light according to the distancefrom a light source to a light projection location.