163results about How to "The positioning method is simple" patented technology

The invention relates to pipeline leakage positioning system and method based on collaborative detection with negative pressure wave and sound wave, which belong to the technical field of fault diagnosis of a petroleum transmission pipeline. Leakage points in a pipeline are detected based on a conventional negative pressure wave technology, an upper computer and a pressure detection lower computer are arranged in two dispatching rooms at the front and rear ends of a long petroleum transmission pipeline and lower computers for sound wave signal detection are arranged on the long petroleum transmission pipeline at an interval of 0.5-1km. The invention has the advantages that by using the collaborative detection with the negative pressure wave and the sound wave, the invention can position the leakage points of the pipeline precisely and lower the false report rate effectively; because a GPRS technology is adopted for communication, the invention is free from paving lines, has low cost and is convenient to move. The positioning system benefits the avoidance of large data volume transmission and the improvement of the communication efficiency. The positioning method used by the upper computer is simple and easy to use.

The invention provides a real-time location method based on a ZigBee network and belongs to the technical field of wireless sensor network location. A system utilized in the method is composed of a reference node, a mobile node, a gateway node and an embedded Web server. In the method, a certain amount of reference nodes are arranged in a monitoring region firstly, wherein the reference nodes can be used as reference points in the location process and do not participate in the location; the mobile node is a location node and can determine self position according to the reference nodes; the gateway node is used for configuring the position information of the reference nodes and simultaneously receiving the position information of the mobile node and then sending the position information to the Web server; and the Web server can realize remote access and control after accessing the network. The invention also provides a real-time location method which can be used for realizing real-time accurate location according to an RSSI (received signal strength indicator) value transmitted among the ZigBee nodes. Compared with other location algorithms and implementations, the method provided by the invention has the advantages of high accuracy and low power consumption, and is safe and reliable in operation.

The invention provides a permanent magnet and induction coil based capsule endoscopy space positioning system. The system comprises a vibration module, an extracorporeal traction permanent magnet, an intracorporeal capsule endoscope, a wireless receiving apparatus and a single-chip microcomputer microprocessor. One end of the vibration module is connected with the extracorporeal traction permanent magnet, and a magnetic path is formed between the extracorporeal traction permanent magnet and the intracorporeal capsule endoscope. The intracorporeal capsule endoscope is in wirelss connection with the wireless receiving apparatus which is connected with the single-chip microcomputer microprocessor. The invention further provides a positioning method of the positioning system. Compared with the prior art, the positioning system and the positioning method have the advantages that occupied capsule space is small, position and posture information of the capsule endoscope can be tracked continuously and obtained in time, great convenience is provided for subsequent operations of detection personnel, the positioning method is simple and easy to implement, and the position system is low in cost and safe and reliable.

The invention relates to a thunder and lightning locator with sound sensors and a locating method thereof. The thunder and lightning locator comprises four sound sensors, a four-passage data acquisition card and a data processing system, wherein the four sound sensors are distributed on four observing points; when thunder and lightning occur, the sound sensors positioned on the four space observing points respectively record the thunder reaching time of the observing points; four groups of time data are converted from A/D (analog to digital) by the four-passage data acquisition card and then transmitted to the data processing system; the data processing system solves the difference of the thunder reaching time of three space observing points through logical operation and computes the difference of the distances of the three space observing points according to the propagation speed of sound in the air; and a coordinate of a thunder and lightning generation position is determined according to an equation set and a principle that a point can be determined by intersecting three hyperboloids in space. The invention ensures high measurement precision, also simplifies a locating measurement method, reduces the hardware requirements and the equipment cost, realizes the accurate automatic locating of the thunder and lightning and can be widely used in the field of meteorological sounding.

The invention discloses a fiber bragg grating sensing dynamic load identification method based on AR model and mahalanobis distance. The method comprises the following steps: arranging the position of a distributed fiber bragg grating sensing network; monitoring and collecting impact response dynamic signals in real time; analyzing time domains of impact response signals and determining a response spectrum characteristic frequency capable of representing impact position information; extracting wavelet-packet-analysis-based spectrum response characteristic frequency and building an AR model parameter matrix; judging similarity between the impact position signals and response signals in a sample library of the AR model parameter matrix by using mahalanobis distance, primarily determining the area of the impact load to be monitored according to three impact positions with high similarity, then accurately identifying the impact load position by using a triangular center location method. Since a fiber bragg grating demodulating system is relatively low in demodulating frequency, the impact load cannot be located by using a time difference method; compared with the conventional time domain locating method, the method is simple and reliable.

The invention discloses a method and a system for positioning dead pixel positions of an LED display screen. The method comprises the following steps of: A, setting a coordinate value of each pixel point in the LED display screen and composition structure data of the LED display screen; B, detecting the display data of each pixel point in the LED display screen; C, judging whether each pixel point is a dead pixel according to the display data, if so, determining the coordinate value of each dead pixel; D, determining the position of each dead pixel in the LED display screen according to the coordinate value of each dead pixel and the composition structure data of the LED display screen to obtain position data of each dead pixel; and E, displaying the position data of each dead pixel, and indicating the position of each dead pixel. The system is correspondingly provided with a detection unit, a processing unit, a display unit and a plurality of indicating units. The method for positioning the dead pixel is simple, and can quickly find the specific position of each dead pixel so as to maintain and replace the dead pixel.

The invention discloses a two-dimensional code compiling method. The two-dimensional code compiling method comprises the following steps of: on the basis of a self-adaptive code compiling extended black and white code compiling technology and a code compiling scheme applicable to different multimedia, introducing an interweaving technology into an error-correcting code compiling technology by using a data compression technology with an open structure during compression code compiling; and adopting an advanced morphologic image pre-processing technology based on multi-scale structural analysis. The two-dimensional code compiling method has the advantages that a two-dimensional code is superior to the conventional two-dimensional code standard in terms of information bearing capacity, robustness, safety, reliability and adaptability; and coding and decoding bottom-layer supporting software provides technical support for various types of application of the two-dimensional code to the field of the internet of things in an open interface mode, the market monopoly position of the conventional foreign two-dimensional code standard can be broken, the chaotic situation of the conventional domestic two-dimensional code application is changed, and a firm foundation is laid for the development of the internet-of-things industry.

The invention relates to a network locating method for wireless sensors, which is mainly used for solving the locating problem of each node in a wireless sensor network. The device comprises two nodes which are a beaconing node and a common node. The two nodes are respectively characterized in that: the beaconing node is provided with a GPS locating module and a wireless communicating module, and is used for receiving the GPS data transmitted by the GPS satellite network and decoding the telegraph message; a service network is made up of a plurality of beaconing nodes so as to provide locating service for the common node through the wireless communicating module; a processor module completes the GPS signal analysis and transmits the locating information through the wireless module; the common node collects the sensor data and sends the sensor data to a upper layer of node after processing; and at the same time the common node acquires the service to complete self-location from the locating network consisting of the beaconing nodes, and ensures the processing and transmitting of the locating information according to the needs.

The invention provides a light source scanning positioning system, which comprises at least two light source emitting devices and at least a light source receiving device; wherein, the light source receiving device comprises a light signal receiver and a optical-electrical conversion module; the optical-electrical conversion module converts the received detection light source into electrical signals; the relative spaces from each of the light source emitting devices respectively to the light receiving device are calculated through extracting the position parameters of the electrical signals which characterizes each of the light source emitting devices and by combining the deviation angles of the light source emitting devices and /or the included angle information of two detection light sources and quoting the sine theorem, and thus the positions of the light source receiving devices are determined. The invention also provides a light source scanning positioning method, and the orientation of a movable object is scanned and determined through the emission and the receiving of the detection light sources; therefore the movable object can automatically distinguish the self position and automatically completes the set moving route.

The invention discloses an underground pipeline leakage point positioning method based on the combination of amplitude fading and correlative detection. The method includes the steps that the range where the leakage point is located is narrowed down quickly through an amplitude fading mode at first, and the leakage point is positioned roughly; two pickup probes are arranged on a metal pipeline to be detected, the probes collect the water leaking sound amplitude of the leakage point, and accordingly the approximate position of the leakage point is judged, and the search range of the leakage point is narrowed to the greatest extent; the accurate position of the leakage point is determined through a correlative detection method; and the difference between the time when the water leaking sound is spread to the left probe and the time when the water leaking sound is spread to the right probe is supposed as t, the interval between the two probes is d, the spreading speed of sound waves in the water pipeline is v, and the distance X1 between the left probe and the leakage point is equal to (d-v*t)/2. The underground pipeline leakage point positioning method based on the combination of amplitude fading and correlative detection has the beneficial effects of being simple, high in precision and low in cost.

The invention provides an indoor wireless positioning method based on path matching. The indoor wireless positioning method based on path matching comprises the following steps that a movable path is pre-defined; the movable path is tracked; the movable path is matched; system errors are corrected to obtain the final indoor positioning result. The indoor wireless positioning method based on path matching achieves high accuracy and interference resistance of indoor wireless positioning, is used for accurately positioning an indoor worker or a robot, tracking and matching the movable route and warning the worker or the robot when the worker or the robot enters a dangerous area by mistake, and particularly meets the requirements for positioning accuracy and interference resistance of power equipment inspection.

The invention relates to a ship two-docking positioning method, wherein the two docking of ship are precisely positioned by assigning a positioning reference line (2), setting a first positioning point (3), a second positioning point (5), a third positioning point (7) and a fourth positioning point (8) and matching with a total station (9). According to the present invention, the ship two-dockingpositioning method has advantages of simple and convenient operation, production period shortening and cost saving.

The invention discloses a vehicle overspeed real-time analyzing system which comprises a track acquisition device and an overspeed analyzing server, wherein the track acquisition device is connected with the overspeed analyzing server through a wireless network. The track acquisition device comprises the components of a positioning module which acquires latitude and longitude data and vehicle speed of the vehicle, a storage unit which stores the latitude and longitude data and vehicle speed of the vehicle at different time points through a data sheet, and an online communication module which uploads the data sheet stored in the storage unit. The overspeed analyzing server comprises the components of a map database which stores digital map data that comprise a speed limit value; an overspeed analyzing unit which performs matching on the acquired latitude and longitude data and road data in the map database, acquiring a matched rod of the latitude and longitude, comparing the speed limit value of the matched rod with the vehicle speed, determining overspeed when the vehicle speed is higher than the speed limit value, and analyzing overspeed information; and a data communication module which is used for communicating with the online communication module and acquiring the data sheet stored in the storage unit. The vehicle overspeed real-time analyzing system has advantages of high real-time performance, low cost and high data application efficiency.

The present invention provides locating device and method for biochip sample application. The locating device includes one image pick-up device and one locating regulation system. The method of locating the biological probe in the biochip carrier accurately includes the following steps: A. providing a biochip sample application locating device including one image pick-up device and one locating regulation system; B. marking the reference point on the biochip carrier before sample application; C. picking up and recording the image of the reference point with the image pick-up device; D. calculating the first sample applying position with the locating regulation system and applying sample; E. picking up the image of the sample applying position; F. performing feedback operation and correcting the next sample applying position and applying sample; and G. repeating the steps E and F until completing all the sample application.

The invention discloses an automobile engine crankshaft timing tooling and a crankshaft timing and positioning method. The crankshaft timing tooling comprises a tooling plate, a cylindrical sleeve anda positioning pin column, the cylindrical sleeve is arranged at one end of the tooling plate, an inner hole of the cylindrical sleeve is matched with an external circle of a crankshaft journal, a keyslot matched with a woodruff key on the crankshaft journal is formed in the inner hole of the cylindrical sleeve, and the other end of the tooling plate is connected with the positioning pin column matched with a positioning pin hole in a crankshaft case. According to the tooling, crankshaft timing positions can be accurately positioned, a crankshaft and the crankshaft case are relatively fixed,a timing system is conveniently installed, and installation accuracy of the timing system is improved. The crankshaft timing and positioning method is simple and easy and avoids large errors caused byvisual inspection of scale marks for positioning in a traditional timing method, the position of the crankshaft is limited while the crankshaft is positioned, rotation of the crankshaft is prevented,and crankshaft timing position stability is ensured when other parts of the timing system are installed.

The invention discloses a single-phase earth fault locating method of a power distribution network. The method comprises the following steps that (1) power distribution network fault indicators are mounted on all nodes and branches of the power distribution network, and three power distribution network fault indicators which are located on the same circuit and different in phase are used for comparing three-phase transient current information in real time to judge if faults happen; (2) fault information of all circuits is sent to a monitoring center to judge fault places. The method is simple and can be used for quickly judging fault positions.

The invention discloses a distributing shuttle vehicle located by a magnetic grid ruler for an automatic stereoscopic warehouse, comprising a rack, wherein the rack is connected with a ground rail via a travelling wheel, and a chain-type conveyer and an electrical control cabinet are arranged on the rack. The shuttle vehicle is characterized in that a magnetic grid sensor is arranged on the bottom of the rack, and a magnetic grid ruler is arranged right ahead the magnetic grid sensor. The shuttle vehicle disclosed by the invention has the characteristics of being cost-saving, convenient to use, simple in structure, high in location accuracy, economic and practical, wide in application range, and the like.

The invention provides a pupil positioning device, which comprises a preprocessing module, an accumulation module and a center position determining module, wherein the preprocessing module is used forobtaining an original image and preprocessing the original image to obtain the gray level of each pixel in a target gray level image; the accumulation module is used for calculating a plurality of first gray level sums corresponding to each line of pixel of the target gray level image one by one, and a plurality of second gray level sums corresponding to each row of pixel of the target gray levelimage one by one, wherein the first gray level sum is the gray level sum of each pixel in the corresponding line, and the second pixel sum is the gray level sum of each pixel in the corresponding row; and the center position determining module is used for determining a line where two ends, which are arranged along a row direction, of the pupil, determining a row where two ends, which are arrangedalong a line direction, of the pupil, and determining the center position of the pupil according to the line where two ends, which are arranged along the row direction, of the pupil, determining therow where two ends, which are arranged along the line direction, of the pupil. The invention also provides a pupil positioning method and sight line tracking equipment. By use of the pupil positioningdevice and method and the sight line tracking equipment, pupil positioning speed can be improved, and resource occupation is reduced.

The invention relates to a mouse catching positioning system. The mouse catching positioning system comprises mouse catching sensors, a controller, a server and a terminal which are in communication connection. The mouse catching positioning system is simple in structure and capable of rapidly and accurately acquire mouse catching information of mousetraps and acquiring the position information of the mousetraps catching mice so that a user can accurately and conveniently arrive at the site to deal with the mice in time. The invention further relates to a mouse catching positioning method. The method comprises the steps that firstly, the mouse catching sensors on the mousetraps are coded, and codes and the position information of the corresponding mousetraps are stored in the controller; secondly, information transmitted by the mouse catching sensors on the mousetraps which catch the mice is calculated by the controller and uploaded to the server, and the user acquires the codes of the mouse catching sensors and the arrangement position information of the corresponding mousetraps through the terminal, and the caught mice are dealt with. The mouse catching positioning method is simple and convenient and quick to use, time and labor are saved, and the working efficiency can be effectively improved.

The embodiment of the invention discloses an indoor positioning method and a system for a dynamic target and applies to the field of electronic information technology, which solves the problem in the prior art that a dynamic target in an indoor environment (such as an office building) is high in positioning cost and poor in applicability. According to the technical scheme of the invention, an indoor positioning solution of low cost, strong adaptability and good environmental universality is provided to meet accuracy requirements. The method comprises the steps of arranging a plurality of radio-frequency identification (RFID) card readers indoors, wherein each RFID card reader is provided with a unique identification number; arranging an RFID electronic tag on each indoor dynamic target; on the condition that the RFID electronic tag is detected by one RFID card reader, uploading the number of the RFID card reader and the information of the detected RFID electronic tag to a terminal; receiving the number of the RFID card reader and the information of the detected RFID electronic tag by the terminal; and parsing the number of the RFID card reader to position a dynamic target identified by the RFID electronic tag.

The invention discloses a continuous heterogeneous large-area impact monitoring network and an impact region positioning method, and belongs to the technical field of aerospace intelligent structures.The continuous heterogeneous large-area impact monitoring network comprises linear piezoelectric sensor continuous series arrays and linear piezoelectric sensor discrete independent arrays which arearranged alternately, and the whole monitoring network is embedded in the interior of an aircraft composite material structure or arranged on the surface of the aircraft composite material structure to form a smart skin. When the structure is impacted by an external object, the monitoring network outputs an impulse response signal. After the impulse response signal is digitized, an impact positionis determined by an impact region positioning method. The continuous heterogeneous large-area impact monitoring network can greatly reduce the number of sensor lead wires needed for large area impactmonitoring of the smart skin of an aircraft and the number of data acquisition channels required by an impact monitoring system, can reduce the complexity of an impact monitoring system processor, reduces power required for impact position calculating so as to improve the reliability of the impact monitoring system.

The invention discloses an indoor positioning method and system. The method comprises the steps of: obtaining a first ceiling shot image of an indoor practical ceiling by a camera, calculating a corresponding conversion matrix from the first ceiling shot image to the practical ceiling; controlling an indoor device to be positioned to emit light signals to the practical ceiling, and generating corresponding projection points on the practical ceiling; obtaining a second ceiling shot image including the projection points by the camera, and calculating the coordinates of the projection points on the second ceiling shot image; and according to the conversion matrix, converting the coordinates of the projection points on the second ceiling shot image into the corresponding practical coordinates on the practical ceiling, and positioning the device to be positioned according to the practical coordinates. In this way, the device to be positioned is positioned, the positioning method is simple, the positioning error is small, the practicability is high, and great convenience is provided to a user.

The invention discloses an underwater node positioning method oriented to a linear sound velocity profile. The method comprises the following steps that: A1: analyzing the linear degree of the sound velocity profile between an input anchor node and a target node; A2: according to different linear degrees, adopting particle swarm optimization; and preferably, in the A2, adopting a single-segment linear sound velocity profile model positioning method for the sound velocity profile of which the linear degree is single-segment linearity to obtain the coordinate of the target node, enabling each segment in the sound velocity profile of which the linear degree is pairwise linearity to be approximate to linear, and adopting a pairwise linear sound velocity profile model positioning method to calculate a horizontal distance between the anchor node and the target node to realize positioning. The particle swarm optimization is superior to the prior art on an aspect of performance, calculation issimplified through a segmented linear processing way, and positioning is more accurate.

The invention discloses a positioning method for elbow parts and provides a machining and positioning method for the elbow parts. According to the machining and positioning method for the elbow parts, the positioning method for the elbow parts is simple and high in positioning accuracy and efficiency, and the technical problems that the positioning accuracy is low, defective products are prone to be produced, and consequently the rejection rate of the parts is increased during machining of the elbow parts in the prior art are solved. The machining and positioning method for the elbow parts generally includes the steps that firstly, center data of flanges at the two ends of an elbow are detected out through a probe; then the data are compared and compensated; the compensated data are verified; and finally, procedural machining is performed through the compensated data.

The invention discloses an instrument panel blind area measuring apparatus applied to a real vehicle, and belongs to the technical field of instrument panel blind area checking tools. The apparatus comprises four portions: a vertical positioning guide rail, a horizontal guide rail, a bidirectional slide block, and an eyellipse simplification apparatus, the vertical direction and the horizontal direction of the bidirectional slide block are provided with two through holes respectively corresponding to the vertical positioning guide rail and the horizontal guide rail, the vertical positioning guide rail is connected with the horizontal guide rail through the bidirectional slide block, one end of the horizontal guide rail is connected with the eyellipse simplification apparatus, the measuring apparatus and an H-point apparatus are matched for usage, conventional parts of the H-point apparatus are well employed, and the eyellipse simplification apparatus can move along the X and Z directions and can rotate around the Y-axis so that the apparatus can be applied to different vehicle types. According to the apparatus, blind area measurement is performed in a real cab environment, a measuring result can be visually reflected, the operation is simple and convenient in a measuring process, and the work efficiency is improved.