125results about "Electric/magnetic area measurements" patented technology

A system and method for measuring volumes and areas using electromagnetic induction techniques. A current is generated and fed into one of two coil assemblies to induce voltage into another coil assembly to provide accurate values for volume or area.

The invention provides a measuring wheel used for measuring distance and area and a measuring method thereof, belonging to the technical field of measuring wheel. The invention solves the problem that the traditional measuring wheel can not directly measure area. The measuring wheel used for measuring distance and area comprises a measuring wheel, a wheel frame arranged on the measuring wheel and a handle connected onto the wheel frame, an operational display interface is arranged on the handle, a sensor used for detecting number of turns of rotation of the measuring wheel, the handle is also internally provided with a central processor, the sensor and the operational display interface are all connected with the central processor, the handle is also internally provided with a storage and a geomagnetic field sensor which are connected with the central processor, the central processor is used for receiving a turn number signal and an angle signal, and area surrounded by the way that the measuring wheel rolls for a circle around the ground is calculated according to circumference of the measuring wheel, number of turns of the measuring wheel and steering angle of the measuring wheel, and a result is delivered to the operational display interface to be displayed. The measuring wheel provided by the invention can measure distance and also can directly, rapidly and accurately realize area measurement.

A system and method for measuring volumes and areas using electromagnetic induction techniques. A current is generated and fed into one of two coil assemblies to induce voltage into another coil assembly to provide accurate values for volume or area.

A method and apparatus for detecting moisture that includes at least three conductors. One of the conductors has a different resistance than the other conductors. A liquid extends between the conductors. The difference between the impedance through a pair of conductors and the liquid and the impedance of through another pair of conductors and the liquid may be used to determine the position of the liquid along a length of the conductors. Similar methods may be used to determine an area of a liquid with respect to the conductors.

The invention relates to the manufacturing field of axial-flow type gas turbine engines, and discloses a device for measuring throat area error of a nozzle guide vane. The device mainly comprises a baseplate of which the center is a rectangular hole, and the baseplate is provided with three width measurement revolving bars, a height measurement revolving bar and three corresponding width locatingplates and a corresponding height locating bar.

The embodiment of the invention discloses a method and a terminal for detecting food calorie. The method comprises the following steps of using a camera assembly to collect an image of to-be-detected food, and obtaining a screen-to-body ratio of the image of the to-be-detected food, wherein the screen-to-body ratio is a ratio of the image in a display screen of the terminal; according to the screen-to-body ratio of the image of the to-be-detected food and the parameters during collecting of the image of the to-be-detected food by the camera assembly, calculating the volume of the to-be-detected food; according to the image, identifying the type of the to-be-detected food, and according to the type of the to-be-detected food, obtaining the intake calorie corresponding to the density and unit mass of the to-be-detected food; according to the intake calorie corresponding to the volume, density and unit mass of the to-be-detected food, calculating to obtain the intake calorie corresponding to the to-be-detected food. The method has the advantages that a user can obtain the calorie of the food by a shooting type in real time, and is assisted to reasonably control the dietary, the timeliness is higher, and the cost is lower.

The invention discloses a variable capacitance-based sensor for corrosion monitoring of a steel structure surface and a manufacturing method thereof. The variable capacitance-based sensor for corrosion monitoring of a steel structure surface comprises an insulating housing with a top open mouth. The interior of the variable capacitance-based sensor for corrosion monitoring of a steel structure surface is divided into an upper layer, a middle layer and a lower layer. Each one of the upper layer, the middle layer and the lower layer comprises an insulating medium plate and a corroded steel material layer pasting on the insulating medium plate. Lead wires are leaded out from the corroded steel material layers. The lead wires respectively pass through holes of an insulating plate. The manufacturing method comprises the following steps of 1, preparing the insulating medium plates, 2, carrying out a drill process on a drilling zone located in the centre of each one of the insulating medium plates, 3, preparing the corroded steel material layers, 4, leading out the lead wires from the corroded steel material layers, 5, carrying out assembling, 6, plugging all gaps of the variable capacitance-based sensor for corrosion monitoring of a steel structure surface by silicon rubber, and 6, based on an area-alterable capacitance sensor work principle, determining a corrosion loss area according to capacitance change, and determining a corrosion depth according to interlayer resistance change. The variable capacitance-based sensor for corrosion monitoring of a steel structure surface has a simple structure, can be installed conveniently, has high reliability, can realize real-time on-line monitoring of the surface of a steel-structure material, and satisfies requirements of steel structure composition monitoring and assessment.

The invention provides a farmland operation area metering method and device. The method comprises the steps that a movement trajectory of an agricultural machine is obtained on the basis of vehicle-mounted GPS data of the agricultural machine, and the movement trajectory is divided into a plurality of element line segments according to track points on the movement trajectory; for each of the element line segments, an external rectangle of each element line segment is generated; for all track points except the starting point of the first element line segment and the ending point of the last element line segment, a buffer area of each track point is generated; the external rectangle of each element line segment is combined with the buffer area of each track point to obtain the operation track buffer area of the agricultural machine, and the operation area is calculated according to the operation track buffer area of the agricultural machine. According to the method, calculation results meet actual conditions of the operation of the agricultural machine, and measurement errors can meet the requirement for measuring the precision of the operation area of the agricultural machine.

The invention relates to an anti-pet tread type alarm and a method thereof for simultaneously measuring areas of a plurality of areas. And the invention includes two parts: an anti-pet tread type alarm and a method thereof for simultaneously measuring areas of a plurality of areas. The method is embodied by a program of distinguishing a foot type by measuring areas of a plurality of areas. And the anti-pet tread type alarm is composed of a rectangle framework, a battery pack, an on-chip microcomputer system, a serial-in-parallel-out circuit, a parallel-in-serial-out circuit and a music circuit; an upper part and a bottom of the rectangle framework are respectively provided with a column electrode group and a row electrode group; and leads of the column electrode group are respectively connected to all parallel input terminals of the parallel-in-serial-out circuit in order as well as leads of the row electrode group are respectively connected to all parallel input terminals of the serial-in-parallel-out circuit in order. Moreover, a two dimensional coordinate system is established according to the leads of the column electrode group and the row electrode group; with utilization of the one-chip microcomputer, treaded areas are scanned and detected; contours of the treaded areas are tracked; areas in all contours are signed by ordinal numbers; calculation on areas by counting cells is carried out on areas in the contours; a foot type is determined; and it is decided whether an alarm sound is emitted or not. The method for measuring an area is completed and is suitable for one-chip microcomputers with all types.

The invention relates to a pet trample-preventing alarming device and a method for classifying foot shapes by measuring a length of an area, which comprises the pet trample-preventing alarming device part and the method part for classifying the foot shapes by measuring the length of the area. The method is reflected on a program for classifying the foot shapes by measuring the length of the area. The alarming device consists of a rectangular framework, a battery pack, a single chip system, a serial-in parallel-out circuit, a parallel-in serial-in circuit and a music circuit, wherein the upper part and the bottom part of the rectangular framework are respectively provided with rows of electrode groups, and conducting wires of the electrode groups are sequentially connected to each parallel input end of the parallel-in serial-in circuit and each parallel output end of the serial-in parallel-out circuit. The program establishes a two-dimensional coordinate system according to array of the conducting wires of the two electrode groups, an area which is pedaled is scanned and detected by a single chip, an outline of the area is traced, a distance between every two outline points is calculated, the maximal distance between two outline points is stored and is adopted as the length of the area, the foot shape is judged, and the alarm is judged whether to issue. The pet trample-preventing alarming device is suitable for the antitheft alarming work.

Disclosed herein are an X-ray imaging apparatus and a control method therefor in which a region of a compressed breast is measured by a touch sensor and a collimator is controlled such that an X-ray emission region corresponds to the measured region of a compressed breast, whereby workflow for performing X-ray imaging may be reduced and subject pain due to breast compression may be alleviated. The X-ray imaging apparatus includes an X-ray source to generate X-rays and irradiate an object with the generated X-rays, a collimator to adjust an emission region of the X-rays generated from the X-ray source, an X-ray detector to detect X-rays having passed through the object to acquire X-ray data, a touch sensor disposed above the X-ray detector, a compression paddle to compress the object placed on the touch sensor, and a collimator control unit to calculate location and size of the compressed object based on an output value of the touch sensor and control the collimator based on calculation results.

The invention provides a land area measurement method which is implemented by a land area measurement system. The system comprises a data collection module, a data correction module, a data result calculation module and a data display module. The land area measurement method comprises the following steps of clicking to start measurement, bypassing a measurement area, receiving positioning information transmitted by a GPS (Global Positioning System) through a mobile phone GPS receiving module, and recording the positioning information; enabling the mobile phone GPS receiving module to automatically convert the positioning information into coordinate points and saving the coordinate points, enabling the positioning coordinate points to generate an original measurement route map, and generating a measurement route map based on a mobile phone built-in Baidu map or Gaode map; establishing a calculation coordinate system, correcting each positioning coordinate point, calculating according tothe corrected data in the third step; and displaying a path of a user and an area S of a graphic. According to the land area measurement method provided by the invention, the coordinate is correctedthrough a new correction algorithm, thereby greatly improving the area measurement precision; and the method is strong in practicability and convenient to popularize.

The invention discloses a through-silicon via (TSV) testing structure and a TSV testing method. The TSV testing structure comprises a semiconductor substrate, an interlayer dielectric layer located on the surface of the semiconductor substrate, a TSV formed in the semiconductor substrate and the interlayer dielectric layer, and at least one interconnection structural ring, wherein the interconnection structural ring is distributed in an annular shape on the periphery of the TSV regarding the TSV as the center and is formed by metal layers on different layers, and electric conduction plugs between the metal layers in a serial-connection mode. Due to the fact that the interconnection structural ring is distributed in the annular shape on the periphery of the TSV regarding the TSV as the center, resistance of the interconnection structural ring is tested in directions far away from the TSV in sequence, tested resistance values are compared with a reference resistance value, then the range of an isolation region between the interconnection structural ring and the TSV can be obtained, and therefore the TSV testing structure and the TSV testing method are convenient and fast to use.

The invention provides a water inflowing detection sensor, a water inflowing protection device, a communication device and a method. The water inflowing detection sensor comprises at least two resistance mesh layers, an electric insulation water absorbing plate and a detection circuit, wherein the electric insulation water absorbing plate is located between the resistance mesh layers; each resistance mesh layer is provided with at least one conductive circuit; the electric insulation water absorbing plate is used for absorbing water and isolating the resistance mesh layers; when the electric insulation water absorbing plate absorbs the water, a water absorbing position of the electric insulation water absorbing plate communicates two adjacent resistance mesh layers; the detection circuit is isolated from the electric isolation water absorbing plate; and the detection circuit is connected with the conductive circuits of the resistance mesh layers to be used for collecting an electrical parameter changing value between the resistance mesh layers and confirming water inflowing detection information according to the electrical parameter changing value. The water inflowing detection sensor, the water inflowing protection device, the communication device and the method can be repeatedly used for water inflowing detection and have strong applicability and transpotability.

The invention discloses a steel wire rope state comprehensive monitoring system and method based on visual-electromagnetic detection, and belongs to the field of mechanical part damage detection. Themethod comprises the steps: detecting wire breakage, abrasion and corrosion damage on the surface of a steel wire rope through a machine vision method, recognizing the steel wire rope with normal andabnormal appearance in a self-adaptive mode through a deep convolutional neural network, and accurately recognizing the type and position of surface damage through a yolov3 algorithm of an improved trunk network; detecting the residual effective sectional area of the steel wire rope and damages such as broken wires, abrasion and corrosion inside the steel wire rope by adopting an electromagnetic detector; updating the established steel wire rope accumulated damage measurable model based on visual-electromagnetic detection according to the detection data; and finally, performing grading evaluation on the steel wire rope health state according to the damage degree. Visual detection and electromagnetic measurement technologies are combined, internal and external damage of the in-service steelwire rope can be comprehensively mastered, and a guarantee is provided for reliable operation of the steel wire rope.

An agricultural machinery operation area measuring and calculating method based on a positioning drift measuring and calculating model comprises the following steps: 1, performing agricultural machinery operation track point acquisition and preprocessing: preprocessing sensor data, filtering agricultural machinery operation state information, and constructing a track point time sequence conformingto an operation state; 2, constructing a positioning track and an operation track; establishing a polygon according to the operation width; 3, calculating the coverage area of the operation track: calculating the track area, the coverage area and the blank area of the operation track from different angles; 4, constructing a positioning drift measurement and calculation model by utilizing the extracted core features, and training a sample to learn model parameters; and 5, agricultural machinery operation area measurement and calculation: inputting the operation track and the operation area tobe calculated into the positioning drift measurement and calculation model to obtain an accurate agricultural machinery operation area. The problem that when multiple operation types exist in the farming process of the agricultural machine, overlapping areas and non-operation areas are generated, the calculation precision of the operation area of the agricultural machine is not high is solved.

The invention discloses a method for calculating the land area based on a line path. Firstly, the target land is determined, and a GPS terminal is installed on the agricultural machine for operation, and the latitude and longitude data are collected in real time during operation, and the latitude and longitude coordinates are GPS point data in rows or columns The form is distributed on the plot of work; then, arrange the GPS point data in time order to form a continuous or discontinuous line path, based on the line path, expand a certain radius along the two sides of the line path to form The polygon becomes the buffer zone; the sector search method is used to optimize the endpoints of the line path to form a buffer area along the endpoint; the convex arc method is used to optimize the buffer area of ​​the polyline part of the line path to form the final line path polyline Part of the optimized buffer zone; finally, the area of ​​the optimized buffer zone is calculated by the vector triangle accumulation method to obtain the final area of ​​the polyhedral plot.

The invention discloses a farmland operating area measuring and calculating method based on GPS positioning data of agricultural machinery. Effective and accurate area measurement can be performed onthe farmland operating area, and a re-farming removal effect is achieved. The method comprises the following steps: during farmland operation, obtaining, by a GPS positioning terminal of the agricultural machinery, GPS positioning information of the agricultural machinery after every set time, transmitting the GPS positioning information to a background data storage center, after the farmland operation is completed, selecting GPS positioning points within the set time period, performing random interpolation on a rectangular cultivated land area between the adjacent GPS positioning points, andperforming spectral clustering on all GPS positioning points after the random interpolation to obtain at least two block regions of first time clustering; performing spectral clustering on each blockregion of first time clustering to obtain at least two block regions of second time clustering; for each block region of second time clustering, removing a blank region without the GPS positioning point, and removing cultivated land inflection points to obtain final block regions; and using the total sum of areas corresponding to all final block regions as a final operating area.

The invention discloses a device and a method for measuring a simple surveying and mapping plane, belongs to the technical field of surveying and mapping tools and aims at providing the device and the method for measuring the simple surveying and mapping plane with the advantages of convenience in use, accurate measurement data and convenience in mapping. The technical scheme adopted by the invention is that the device for measuring the simple surveying and mapping plane comprises an electronic distance measuring module with a distance measuring function, a microprocessor module, a control display module with functions of recording angles and displaying data, a storage module and a power supply module, wherein the electronic distance measuring module adopts an electronic distance measuring wheel; the output end of the electronic distance measuring module is connected with the input end of the microprocessor; the electronic distance measuring module is used for transmitting the acquired length data to the microprocessor module; the control display module and the storage module are respectively connected with the microprocessor module; the control display module comprises control buttons and a display screen; and the control buttons comprise a start button, an end button, a length button and an angle button. The device and the method disclosed by the invention can be widely applied to the field of indoor measuring and mapping.

An agricultural machinery operation area calculation method based on path point analysis comprises the steps that a GPS data acquisition device is installed in the center of the top of agricultural machinery, longitude and latitude data of agricultural machinery driving and operation path points are acquired and recorded in real time, and longitude and latitude coordinates of the path points are converted into a rectangular plane coordinate system through Gaussian projection positive calculation; a driving path point and an operation path point are distinguished by utilizing spatial data clustering division to acquire agricultural machinery operation fields by utilizing a distance threshold, a scatter diagram is drawn for an agricultural machinery operation path in each agricultural machinery operation field, and a scatter diagram contour is calculated by applying a scatter diagram boundary extraction algorithm, and area calculation is made on a polygon formed by the outline of the scatter diagram of the operation field by adopting triangulation and numerical integration algorithms so as to obtain the area of each agricultural machinery operation field.

A Beidou measurement system based on a mobile phone module is composed of a positioning terminal, a smart phone and a cloud server. Client control software is embedded in the smart phone; through a USB data line, an original observation value of a Beidou satellite received by the positioning terminal is extracted, and power is supplied to the positioning terminal. The smart phone client includes aplurality of usage modes which are an acre value setting module, a vehicle width setting module, a slope setting module, a unit price setting module and a factory setting module. A cloud server system includes an identity authentication module, an original observation value data storage module, an RTK access module and an analysis and calculation module. The cloud server obtains the data receivedby the smart phone control software through a wireless network for analysis and calculation, and feeds back analysis and calculation results to the smart phone client; and the cloud server can obtainan access RTK differential technology through various methods, analyzes and calculates the original observation value to obtain corrected position information, and finally the area is measured accurately.

An inductance measuring apparatus for exhaust areas of director guider blades belongs to the technical field of aeroengines. The apparatus comprises a support. The upper portion of the support is provided with a base plate. Cross section measuring levers are disposed under the base plate. Every two cross section measuring levers correspond to one cross section. The middle portions of the cross section measuring levers are disposed on the support through a mandrel. The bottom end of each cross section measuring lever is provided with a contact. The base plate is equipped with through holes. The lower ends of limiting screws penetrate the through holes and then are in threaded connection with the cross section measuring levers. The base plate is also equipped with installing holes, which correspond to the upper ends of the cross section measuring levers. Locking screws are disposed on the base plate and positioned on the side of the installing holes. A positioning plate is disposed on one side of the support. The lower end of the positioning plate is equipped with a radial positioning pin. A radial measuring lever is disposed on the other side of the support. The middle portion of the radial measuring lever is connected to the support through a pin shaft. The limiting screws are in threaded connection with the radial measuring lever. The lower end of the radial measuring lever is provided with a measuring pin.

The invention comprises two parts. One is an anti-pet trampling type alarm and the other is a method for distinguishing foot types through area measurement. The method is embodied by a program of using the area measurement to distinguish the foot types. The alarm comprises: a rectangular frame, a battery pack, a single-chip microcomputer system, a serial-in parallel-out circuit, a parallel-in serial-in circuit and a music circuit. An upper part and a bottom of the rectangular frame are respectively provided with a column electrode group and a row electrode group. Leads are sequentially connected to each parallel input terminal of the parallel-in serial-in circuit and each parallel output terminal of the serial-in parallel-out circuit respectively. A two dimension coordinate system is established according to lead arrangement of the row electrode group and the column electrode group. The single-chip microcomputer is used to scan and detect the trampled area. The area is calculated through counting grids and the foot types are determined so as to decide whether an alarm is emitted. The alarm is suitable for antitheft alarm work.

A wearing detection module configured to be fixed on a spectacle frame element of a smart spectacle frame, the spectacle frame element including a first surface configured to face the wearer when using the smart spectacle frame and a second surface opposed to the first surface, and the wearing detection module including a pair of sensors configured to measure one parameter indicative of the distance between the spectacle frame element and the wearer, one sensor is arranged on the first surface and the other one is arranged on the second surface, and a processing unit configured to receive data indicative of the parameter sensed by each sensors and to determine a wearing data indicative of the use by the wearer of the smart spectacle frame based on the received data.

The invention relates to an assessment method for the heat exchange tube wall sinking degree based on eddy current testing. The assessment method comprises the following steps: (1) manufacturing a sampling tube which has the same material and size of a heat exchange tube to be detected, and pressing a plurality of sink marks on the outer surface of the heat exchange tube through a steel bar perpendicular to the axis of the heat exchange tube; (b) measuring the length L of each sink mark, the outer radius R of the heat exchange tube to be detected and the radius r of the steel bar, and calculating the tube wall sinking area S of each sink mark; (c) performing eddy current testing on the sampling tube with the pressed sink marks to obtain an amplitude value V of each sink mark, introducing the areas S and the amplitude values V into a formula (2) to obtain a plurality of groups of A values and B values, and averaging the A values and the B values to obtain A1 and B1; (d) performing eddy current testing on the heat exchange tube to be detected to obtain an amplitude value V of tube wall sinking of the heat exchange tube, and introducing the amplitude value V, the A1 and the B1 into the formula (2) to calculate a sinking area of the tube wall. Through the adoption of the assessment method, the sinking degree of the tube wall can be known visually and clearly, so that basis is provided for the treatment decision of the heat exchange tube to be detected.

The invention relates to the field of sea surface oil spill detection technology, and discloses a GNSS-R shore-base sea surface oil spill remote-sensing detection method. The method comprises the following steps: (1) receiving signals, wherein direct and reflected signals in detection equipment are received through GNSS-R technology; (2) calculating a signal reflectivity polarization ratio: and (3) judging a sea surface oil spill situation, wherein the polarization ratio obtained in the step (2) is compared with a theoretical value, a sea surface oil spill exists if the same is greater than the theoretical value, and no sea surface oil spill exists if the same is less than the theoretical value. In the method, limited coverage ranges (blazed zones) of receivable reflected signals of an antenna at different times are calculated according to obtained orbital parameters of a navigation satellite, a position of a platform and erection height data of the antenna, calculation simulation is carried out on blazed zones of a period of time, and flexible simulation can be carried out for blazed zone coverage situations of the satellite at the different times.