123results about "Electric/magnetic area measurements" patented technology

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.

The invention relates to a cell scanning and GPS trajectory interpolation-based agricultural machinery tillage area measurement and calculation method and belongs to the GPS trajectory information-based agricultural machinery tillage area measurement and calculation technical field. The objective of the present invention is to solve the problem of low accuracy of existing agricultural machinery tillage area measurement and calculation method. According to the method of the invention, latitude and longitude points are uploaded and are subjected to interpolation processing, so that the area of tilled land is marked, and with interpolation adopted, the precision level of area measurement and calculation reaches to a high level; maximum and minimum values in an X direction and a Y direction are judged according to coordinate values, and the circumscribed rectangle of a tilled land path is determined; with the tillage breadth of the agricultural machinery adopted as the edge of each cell, cumulative scanning is carried out on the cells from one end of the circumscribed rectangle, if interpolation points exist in the cells, so that accumulation recording is carried out; and final tillage area is calculated according to the number of accumulated cells. The method of the invention is applicable to the agricultural machinery tillage area measurement and calculation conditions.

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.

A sensor includes a stretchable substrate having a stretching property, and a plurality of wires provided to the stretchable substrate, and the plurality of wires includes a first wire, and a second wire larger in resistance value variation due to extension of the stretchable substrate than the first wire. Further, the sensor includes a detection section adapted to correct a resistance value of the second wire in accordance with a resistance value of the first wire, and detect the extension of the stretchable substrate based on the resistance value of the second wire which has been corrected. Further, the detection section detects deterioration of the plurality of wires in accordance with the resistance value of the first wire.

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 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 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.

The invention relates to a rectangular baler yield monitoring system and a yield monitoring method based on a Beidou/GPS technology, which belong to the technical field of balers. The system comprisesa weighing device for measuring the weight of a rectangular bale, a first slave controller for reading and processing data of a weighing sensor, a Beidou/GPS receiver for reading the geographical position data of the baler, a second slave controller for reading the data of the Beidou/GPS receiver and combining the breadth of the baler to calculate the working area, a main controller for reading the data of the first slave controller and the second slave controller and performing real-time yield monitoring and data storage and a terminal display with a real-time display function, wherein the weighing device and the first slave controller are located at the tail end of a bale output slideway; the Beidou/GPS receiver is located outside a tractor; and the second slave controller, the main controller and the terminal display are located inside the tractor cab. Real-time and reliable straw yield spatial distribution information corresponding to the temporal geographic position can be acquired, and a farmer can understand the harvest and manage the work field accurately.