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67results about How to "Flying low" patented technology

Method for manufacturing magnetic disk glass substrate and method for manufacturing magnetic disk

InactiveUS20070003796A1Float stablyReduction of fly heightRecord information storageBase layer manufactureIon exchangeMagnetic disks
A method for manufacturing a magnetic disk glass substrate including a chemical strengthening step is provided. In the method, chemical strengthening treatment is sufficiently performed over the entire main surfaces of a glass substrate. Consequently, the resulting magnetic disk glass substrate can provide a magnetic disk allowing the magnetic head to have a low flying height and achieving high-density information recording, and particularly a magnetic desk suitably used in small hard disk drives for portable information apparatuses. In the chemical strengthening step, a chemical strengthening agent is brought into contact with a glass substrate to perform ion exchange by allowing the chemical strengthening agent to flow with respect to the glass substrate, or by moving the glass substrate with respect to the chemical strengthening agent.
Owner:HOYA CORP

Method of manufacturing a head gimbal assembly with substantially orthogonal tab, side beam and base

InactiveUS7010847B1Great data storageEasy and quick and inexpensive manufactureElectrical connection between head and armElectrical transducersEngineeringPartial closure
Methods of manufacturing a load beam including a flexure / slider assembly are provided. A pre-form of a load beam has a base, a side beam extending from the base and a tab extending from the side beam, all substantially in a common plane. The flexure / slider assembly is attached to the base, then the load beam is bent in two locations, between the tab and the side beam, and between the side beam and the base. After bending, the tab and the side beam are substantially orthogonal to one another and both the tab and the side beam are substantially orthogonal to the base so that the base, side beam, and tab form a partial enclosure around the slider.
Owner:WESTERN DIGITAL TECH INC +1

Disk drive, head slider, and head supporting device

A disk drive including: (a) a recording medium; and (b) a head slider having (i) a first air bearing on the side of an air inlet end, and (ii) a second air bearing on the side of an air outlet end. The second air bearing includes a positive pressure generating portion on the side of the outermost air outlet end, and a first arm and a second arm, respectively extending from both ends of the positive pressure generating portion toward the air inlet end. Extending directions of the first arm and the second arm are defined so that the pressure generated by the second air bearing when the head slider is used on the inner diameter side of the recording medium is higher than the pressure generated by the second air bearing when the head slider is used on the outer diameter side of the recording medium.
Owner:PANASONIC CORP

Method for obtaining remote-sensing images by same-sortie variable-flight-height unmanned aerial vehicle

Provided is a method for obtaining remote-sensing images by a same-sortie variable-flight-height unmanned aerial vehicle. The method comprises an unmanned aerial vehicle body, an unmanned aerial vehicle flight height control module and aerial photography equipment carried by the unmanned aerial vehicle body. The method is characterized in that in the flying process of the unmanned aerial vehicle, the flight height of the unmanned aerial vehicle is dynamically adjusted according to changes of heights of terrains. The method has the advantages that under the condition that the take-off and landing times are reduced, the situation that the ground resolution of the images is in a good state is effectively guaranteed, meanwhile, consistency of the ground resolution of the different images is good, and processing difficulty of the images in the later period is reduced.
Owner:CHONGQING SURVEY INST

Chlorophyll content estimating method for winter wheat in returning green stage

The invention discloses a chlorophyll content estimating method for winter wheat in a returning green stage. The method comprises the following steps: acquiring an actually measured value of the chlorophyll content of the winter wheat in the returning green stage at a sampling point; acquiring a multispectral remote sensing image of the sampling point, shot and transmitted by an unmanned aerial vehicle; pre-processing the multispectral remote sensing image to obtain a wave band image of which an image reflectivity is within a preset threshold value; extracting a reflectivity value of each waveband of a pixel corresponding to the sampling point from the wave band image; performing correlation analysis on the actually measured value of the chlorophyll content and the reflectivity value of each wave band by using a statistics product and service solution method, to obtain a sensitive wave band; through a multiple linear regression method, constructing chlorophyll content estimating models; screening the chlorophyll content estimating models to obtain an optimal estimating model; and estimating the chlorophyll content of the winter wheat in the returning green stage in an area to be tested by using the selected optimal estimating model. The provided chlorophyll content estimating method based on the multispectral image of the unmanned aerial vehicle is capable of solving the problems that an existing method wastes time and energy, the time stability is poor,and a spatial resolution is low, and the like.
Owner:SHANDONG AGRICULTURAL UNIVERSITY

Agricultural plant-protection levitation-type flight work platform

The invention provides an agricultural plant-protection levitation-type flight work platform, which solves the problems of the existing aircraft that the safety coefficient is not high and safety potential danger exists. The agricultural plant-protection levitation-type flight work platform comprises a levitation lifting body, a propelling part and a lifting part, wherein the lifting part is embedded in a central duct of the levitation lifting body and used for adjusting the operation height of the work platform in real time; and the levitation lifting body is connected with the propelling part, and the propelling part is used for supplying thrust and steering force needed by the flight. The agricultural plant-protection levitation-type flight work platform has the advantages of safety in use, low flight height, controllability in flight speed and suitability for distributing the plant-protection preparation and can prevent the problems such as the threat of facilities or personnel on the ground brought by the flight accident easily caused by the low safety coefficient and safety potential danger of the existing aircraft in the flight process; and through the control of a uniform command of a subarea control station, on the premise that the normal operation effect of the agricultural facilities is not influenced, completely-unmanned and automatic high-efficient agricultural plant-protection operation can be effectively realized.
Owner:南京稻可道智能科技有限公司

Dual-rotor coaxial helicopter with wing-shaped rotors

InactiveCN103057703AShorten speedShort voyageRotocraftShape changeRotary wing
The invention relates to a dual-rotor coaxial helicopter with wing-shaped rotors, and the helicopter belongs to B64C 27/04. helicopters according to international patent technology classification. The general layout adopts a mashup design of a dual-rotor coaxial helicopter and a fixed wing aircraft with preposed canard wings. An elevator is preposed, and horizontal wings and ailerons for lateral control are disposed at the rear. A control surface that is responsible for yaw control is positioned behind ducted propellers that are disposed at the rear and used for providing thrust. Fans are arranged below the fuselage on the left and the right so as to retreat or horizontally and slightly adjust the fuselage hovering position or make the fuselage revolve. Due to the wing shape change, when an engine encounters in-flight shut-down, the helicopter continuously suffers height loss, so that air and the rotors interact to convert the potential energy of the helicopter into kinetic energy, which makes the rotors continue to rotate according to the rotation direction of the engine during working hours. Consequently, a lifting force can be generated, and fall can be changed to a safe landing. The helicopter provided in the invention can solve or improve the problems of small speed, short flying range, low flight height, great vibration and noise, poor reliability, high cost and use fee in helicopters in active service.
Owner:顾惠群

Vegetation coverage estimating method

The invention discloses a vegetation coverage estimating method. The method comprises the steps of obtaining an actual vegetation coverage measuring value of a sampling point; obtaining multispectralremote sensing images of the sampling point transmitted and photographed by an unmanned aerial vehicle; preprocessing the multispectral remote sensing images to obtain a waveband image of the image reflectivity within a preset threshold value; extracting the waveband reflectivity corresponding to the pixel of the sampling point in the waveband image; applying a statistic product and service solution for performing relevance analysis on the actual vegetation coverage measuring value and the waveband reflectivity to obtain a sensitive waveband; constructing a vegetation coverage estimating modelthrough a multi-element linear regression method; screening the vegetation coverage estimation model to obtain the preferential estimating model; utilizing the selected preferential estimating modelfor estimating the vegetation coverage of the region to be measured. According to the vegetation coverage estimating method based on unmanned aerial vehicle multispectral images, the problems that according to an existing method, time and labor are wasted, the time stability is poor, and the space resolution is low are solved.
Owner:SHANDONG AGRICULTURAL UNIVERSITY

Magnetic disk substrate and magnetic disk thereof

The object of present invention is to provide a magnetic disk substrate which uses a silicon substrate, in which chamfered surfaces are provided between the main surfaces of the silicon substrate and the outer circumferential surface; a ski-jump value H0 where H0≦0 μm, representing the distance from the basal level to point A3; a roll-off value H1 where H1≧−0.2 μm and H1≦0.0 μm, representing the distance from the basal level to point A1; a tag-off value H2 where H2≧0 μm and H2≦0.012 μm, representing the maximum displacement of the border line of the main surface with respect to the line A1 to A2; curved surfaces are provided between the main surfaces and the chamfered surfaces; and the curvature radius R of the curved surface where R≧0.013 mm and R≦0.080 mm.
Owner:SHOWA DENKO KK

Forest fire behavior monitoring system and method

The invention relates to a forest fire behavior monitoring system and method. The system comprises a server, a main unmanned aerial vehicle and auxiliary unmanned aerial vehicles. The server is used for acquiring a first image of a forest calibration area acquired by the main unmanned aerial vehicle, and the main unmanned aerial vehicle flies at a first height; when it is determined that a fire occurs in the calibration area according to the first image, the multiple auxiliary unmanned aerial vehicles are controlled to the calibration area, the multiple auxiliary unmanned aerial vehicles and the main unmanned aerial vehicle form a polygonal array to fly and jointly fly at a second height, and the second height is lower than the first height; a plurality of continuous second images acquiredby the main unmanned aerial vehicle and the auxiliary unmanned aerial vehicles at a second height are acquired, wherein the second images acquired by the adjacent unmanned aerial vehicles at least partially coincide; and change trend information of an on-fire area and a fire center according to all the second images is determined. According to the technical scheme, reasonable and targeted forestfire extinguishing and disaster relief work can be conveniently carried out in time, so that corresponding losses are reduced.
Owner:光谷技术有限公司
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