51results about How to "Accurate magnification" patented technology

The invention discloses a method for rapidly detecting ferromagnetic grain content in lubricating oil and a detection device thereof as well as a signal processing circuit. A transformer type electromagnetic sensor is adopted, and variation of related parameters of the electromagnetic sensor which is caused by variation of field distribution due to ferromagnetic grain in lubricating oil is detected, so as to detect ferromagnetic substance content in lubricating oil. Influence of nonferromagnetic pollutant can be naturally eliminated, higher linearity can be realized, meanwhile cost is low, and real time property is good.

A fundus oculi observation device comprises: an image forming part configured to optically acquire data and form a tomographic image of a fundus oculi of an eye; a storage configured to store optical information representing a state of an ocular optical system of the eye; a calculator configured to calculate a magnification of the ocular optical system, based on the optical information; and an analyzer configured to analyze the tomographic image, based on the magnification.

The invention discloses a one-freedom-degree flexible micro-positioning platform. The one-freedom-degree flexible micro-positioning platform comprises a motion input device, a flexible motion platform and a platform base used for fixing the flexible motion platform; and the flexible motion platform comprises two half motion mechanisms, and each half motion mechanism comprises a motion platform connected through flexible hinges and multi-stage differential motion levers. According to the design, displacement is amplified and can be accurately amplified on the conditions that the positions and the sizes of the flexible hinges and the levers are accurate; the design structure is simple, the occupied space is relatively small, displacement can be output stably through the symmetric structure, lateral additional displacement can be effectively removed, longitudinal coupling displacement errors of the platform can be reduced, the displacement amplification accuracy is improved, and the flexible hinges can be integrally machined easily due to the design, and assembly errors can be avoided. Displacement amplification is accurately realized in relatively-small space and at low cost, and the problem that large stroke and high accuracy of the flexible micro-positioning platform cannot be balanced is solved.

The invention discloses a mutual coupling compensation analysis method for a microstrip array antenna. The method comprises the following steps of: modeling an array antenna structure, and performing delaunay triangulation on the structure by using the delaunay of a MATLAB function to divide the surface of a metal to be researched into a series of triangles, wherein each pair of triangles with common sides forms corresponding Rao-Wilton-Glisson (RWG) side elements; and replacing the surface current distribution of the RWG side elements of two triangles by using an infinitesimal dipole with an equivalent dipole moment or strength by adopting a dipole modeling method, and determining the electromagnetic radiation characteristics of a free space for surface current. A mutual impedance array, solved by adopting a moment method, of the microstrip array antenna takes the effect of mutual coupling between adjacent radiation elements into account. Therefore, a mutual coupling weight vector of an array unit is corrected during weight vector calculation mutual coupling effect correction to further optimize the output direction characteristics of an array.

An electron beam exposure apparatus for exposing wafer with an electron beam, includes: a first electromagnetic lens system for making the electron beam incident substantially perpendicularly on a first plane be incident on a second plane substantially perpendicularly; a second electromagnetic lens system for making the electron beam that was substantially perpendicularly incident on the second plane be incident on the wafer substantially perpendicularly; a rotation correction lens provided within the first electromagnetic lens system for correcting rotation of the electron beam caused by at least the first electromagnetic lens system; a deflection system for deflecting the electron beam to a position on the wafer; and a deflection-correction optical system provided within the second electromagnetic lens system for correcting deflection aberration caused by the deflection system.

A fundus oculi observation device comprises: an image forming part configured to optically acquire data and form a tomographic image of a fundus oculi of an eye; a storage configured to store optical information representing a state of an ocular optical system of the eye; a calculator configured to calculate a magnification of the ocular optical system, based on the optical information; and an analyzer configured to analyze the tomographic image, based on the magnification.

The invention relates to a system and a method for managing commodities in a three-dimensional on-line platform and in particular relates to a system for displaying and adjusting commodities in on-line commercial mall such as an on-line platform realized by adopting a three-dimensional technique and an operation method thereof. The method comprises the following steps of: storing the information of a commodity list into a data management device, logging in the network commercial mall, returning the commodity list through a client terminal to a three-dimensional display platform of the client terminal, and generating the two-dimensional commodity list into a three-dimensional commodity model and displaying on the shelf position of the three-dimensional display platform. The system and method disclosed by the invention can be used for displaying a pure 3D (three-dimensional) model of a commodity in the commercial mall display platform through processing the commodity list; business men can move the commodity model generated in the commercial mall display platform to the shelf position and can rotate the commodity model, thus, the commodity model can be more precisely zoomed in or zoomed out.

The invention discloses a power-off maintaining three-degree-of-freedom piezoelectric directional adjustment device and platform control method, and relates to a piezoelectric driving adjustment device and method. The device comprises a platform, a base and three or four adjustment mechanisms, wherein each adjustment mechanism comprises an ejector rod, a driving mechanism, a braking mechanism and a supporting body; the upper end of the ejector rod is fixed to the platform, a universal flexible hinge is machined on the ejector rod and located between the upper portion of the supporting body and the platform, and the supporting body is fixed to the base. The method comprises the steps: 1, assembling the adjusting mechanism, the platform and the base; 2, relieving the self-locking state of the ejector rod; 3, enabling the adjustment device to control the platform to achieve three-degree-of-freedom adjustment. The device is compact in structure, is used in a space environment, is stable and reliable in operation, can realize three-degree-of-freedom adjustment of the platform, and can meet the application requirements of the space environment.

The invention belongs to the civil engineering monitoring equipment field and particularly relates to a field visualization type strain sensor, which comprises an elastic element, a strain gauge, a circuit board and a field early-warning device. The elastic element is fixed in a measured structure. The strain gauge is arranged on the surface of the elastic element. The strain gauge is connected with the circuit board. The deformation of the strain gauge is converted into an electrical signal and the electrical signal is transmitted to the circuit board. The circuit board is also connected with the field early-warning device. The circuit board includes a balanced bridge, a precise amplifier circuit, a signal processing module, an STM 32 single-chip microcomputer and a data transmission module. The invention also discloses an early-warning method based on the above strain sensor. According to the technical scheme of the invention, an alarm lamp is integrated with the sensor itself, and different colors of the alarm lamp correspond to different degrees of the structural deformation. Therefore, the engineering safety state is displayed in real time. The invention provides a real-time, in-situ and easily-understood engineering monitoring and early warning manner, wherein the field early-warning function and the remote control function are simultaneously realized. The early-warning effect is better.

A current mirror circuit that amplifies a reference current generated by a current source at a first magnification to supply a mirror current to a load circuit. The current mirror circuit includes a first transistor and a second transistor that share a power supply, and a drain potential mirror unit that amplifies the reference current at a second magnification to generate a first current, that amplifies a generated first current at a third magnification to generate a second current, and that supplies a predetermined potential determined based on the second current to a drain of the second transistor. The mirror current is supplied from the second transistor to the load circuit based on a potential of a gate of the first transistor determined based on the reference current

The invention discloses a small signal amplifying measurement circuit which can reach 1% accuracy. The circuit has the advantages of common-mode interference inhibiting, temperature excursion inhibiting, high stability and high anti-interference performance. The small signal amplifying measurement circuit comprises a signal input module, a voltage amplifying circuit, a salinger filter, a voltage follow circuit, an isolating circuit and a post collection system. The small signal amplifying measurement circuit is characterized in that an output end of the signal input module is connected with an input end of the voltage amplifying circuit, an output end of the voltage amplifying circuit is connected with an input end of the salinger filter, an output end of the salinger filter is connected with an input end of the voltage follow circuit, an output end of the voltage follow circuit is connected with an input end of the isolating circuit, and an output end of the isolating circuit is connected with an input end of the post collection system.

A current mirror circuit that amplifies a reference current generated by a current source at a first magnification to supply a mirror current to a load circuit. The current mirror circuit includes a first transistor and a second transistor that share a power supply, and a drain potential mirror unit that amplifies the reference current at a second magnification to generate a first current, that amplifies a generated first current at a third magnification to generate a second current, and that supplies a predetermined potential determined based on the second current to a drain of the second transistor. The mirror current is supplied from the second transistor to the load circuit based on a potential of a gate of the first transistor determined based on the reference current.

The invention discloses a correction device and a correction method for a 1X optical sight with an image display function. The correction device comprises an optical bench, a graduation component, a collimator objective, an optical sight mounting rack, a rotary encoder and a theodolite. The graduation component, the collimator objective, the optical sight mounting rack and the theodolite are sequentially arranged on the optical bench in the direction of a straight line, and the rotary encoder is connected with a movement component of the optical sight. Compared with the prior art, the correction device and the correction method have the advantages that the calibration environment is designed relatively simply, the multiplying power is relatively accurate, a product does not need to be disassembled during calibration, calibration can be realized only through the rotary encoder on the optical sight, and thus the leakproofness of the product and the consistency of product adjustment are guaranteed.

The invention discloses a programmable time amplifier circuit with high precision and a high dynamic range. The programmable time amplifier circuit comprises a phase detection circuit, a time preprocessing circuit, a rail-to-rail voltage comparator, a 3-8 decoder and a current biasing circuit. The phase detection circuit extracts a time interval of a step input signal and generates a pulse signal DN; the time preprocessing circuit controls the current source to charge and discharge the capacitor according to the pulse signal DN to generate two groups of ramp signals; the rail-to-rail voltage comparator realizes comparison in a full voltage range according to the two groups of input ramp signals; the 3-8 decoder provides a control signal for a capacitance control switch of the time preprocessing circuit; and the current bias circuit provides reference current bias for the time preprocessing circuit and the rail-to-rail voltage comparator. According to the invention, the input time interval can be accurately amplified, the time interval amplification of a high input range can be satisfied, the amplification factor programmable function can be realized, and the resolution and quantization input range of the assembly line TDC can be effectively improved.

The invention discloses a correcting device and method for X-ray image digital measurement. The correcting device comprises a base, a longitudinal supporting rod, a transverse supporting rod, a straight edge and two metal balls, wherein the longitudinal supporting rod is fixed on the base; the longitudinal supporting rod and the transverse supporting rod are connected and can slide mutually, and the transverse supporting rod can rotate in the horizontal plane and the vertical plane; the straight edge is connected with one end of the transverse supporting rod, and the straight edge can rotate in the horizontal plane and the vertical plane; the two metal balls are respectively arranged at one end of the straight edge, and the centers of the two metal balls coincide with the calibration starting point and the calibration ending point of the straight edge respectively; the straight edge is made of plastic and is provided with metal calibrations. According to the correcting device for the X-ray image digital measurement, a reference substance of the balls is provided, so that the measurement errors caused by different irradiation directions due to non-sphere shape characteristics are eliminated, the computation of magnification can be more simplified, and more accurate magnification can be obtained. According to the correcting device and method for the X-ray image digital measurement, the femoral head and femoral neck can be conveniently and accurately measured.

The invention discloses an electric power channel inspection method based on a fuzzy path. The method comprises the following steps: 1, acquiring fuzzy path information required by electric power channel inspection from a map; 2, sending the path information to the unmanned aerial vehicle in a wireless mode; 3, the unmanned aerial vehicle flying to the position near a first inspection position point in the path, recognizing a target object based on machine vision, and judging the position and height of the unmanned aerial vehicle according to parameter characteristics of the target object; 4, after the unmanned aerial vehicle arriving at the designated position and height, adjusting the proportion of the target in the picture through a focal length adjustment algorithm, photographing and identifying defects; 5, repeating the step 3 and the step 4 until the inspection operation of all the path points is completed; and 6, the unmanned aerial vehicle returning and landing. According to the inspection method, the key path points are simply selected on the map to form fuzzy path information, the link of manually collecting the path information or setting the path information through three-dimensional point cloud data is omitted, manpower and material resources are saved, and the efficiency is improved.

A method for correcting magnification in a photographic device is disclosed in this present invention. The point of this invention is that the magnification ratio of a photographic device is saved into a nonvolatile memory and read out for correcting the magnification in the photographic device, so that the image with correct dimension can be output from the photographic device. Therefore, this invention can provide a more efficient method for correcting magnification in a photographic device, and the quality of the image captured by the photographic device can be improved thereby.

A method for choosing zoom-out range features that a box is inserted in a picture displayed on display screen and them moved to any position on the picture, and the contents in the box can be zoomed out by the proportion setting. Said methods can be used for drafting computer.

A method and system are provided for obtaining a true shape of objects in a medical image. The method includes receiving X-ray stand geometry parameter values, an Anglepoint, and an Anglestand values; selecting a plurality of pixels representing an object in the X-ray image; and determining magnification of each pixel in the X-ray image, that enables accurate determination of size and shape of imaged objects. The method may include determining an actual size of the object in the X-ray image and selectively reshaping the object in the X-ray image to obtain a true shape of the object.

The embodiment of the application provides a page presentation method and device of electronic equipment. The method includes: determining margins of a current page of the electronic equipment; determining a main-text region of the current page according to the margins; and using the main-text region to cover the margins for presentation on the current page. According to the embodiment of the application, the margins of the current page are determined, then the main-text region of the page is determined according to the margins, then the main-text region is used to cover the margins, thus enlargement of the main-text region is realized, an enlarged main-text region is displayed on the current page, a user is enabled to remove space occupation of the margins on the current page when the current page is browsed, fonts and an occupied area of the main-text region seen by the user are enabled to be larger, and reading experience of the user is good.

The embodiment of the invention provides an interference signal processing method and device and a GSM mobile terminal, and relates to the technical field of data processing. The method is applied toa processor of the GSM mobile terminal, and the GSM mobile terminal comprises a power amplifier, an antenna switch module and a transceiver; the power amplifier is electrically connected with the transceiver and the antenna switch module, and the transceiver is electrically connected with the processor. The method comprises the following steps: sending a control signal to the power amplifier through the transceiver; when the communication signal sent by the transceiver is not synchronous with the working actions of the transceiver, the power amplifier and the antenna switch module, the sendingtime of the control signal is adjusted, so as to adjust the time interval of the working action of the transceiver, the working action of the power amplifier and the working action of the antenna switch module so that the power amplifier amplifies the communication signal according to the adjusted control signal and sends the processed communication signal through the antenna switch module, and the problem of clock signal leakage can be solved.

The invention discloses a nan-micro positioning platform which comprises motion input devices, a flexible motion platform and a platform base used for fixing the flexible motion platform; the motion input devices are connected with one side of the flexible motion platform through a first input lever; the flexible motion platform is connected with an output platform through a flexible hinge; the front end of the first input lever is connected with the platform base; the middle section of the first input lever is equipped with a first input table connected with a first motion input device; the tail end of the first input lever is equipped with a second input table connected with a second motion input device; and the other side of the tail end of the first input lever is connected with the flexible motion platform. According to the nan-micro positioning platform disclosed by the invention, different input platforms are separately arranged on different positions of levers for inputting displacement; displacement is input from different positions of the input platforms, and the first input lever is used for transmitting motion, so that different displacement magnification times can be realized, and correspondingly, displacement output precision is different, and therefore, the nano-micro positioning platform can meet needs on different output stroke times and different precision under different application scenes.

The invention discloses a variable gain amplification circuit for pressure-sensitive touch. The circuit comprises an operational amplification module, a gain configuration module and a clock control module; the clock control module is used for generating a control clock; the gain configuration module is used for configuring gain and output bias voltage according to the control signal, so that an input signal is amplified through reverse operation, superposed with fixed bias voltage and then output; according to the invention, the gain of the amplification circuit is adjusted by adjusting the capacitance value ratio of the input end of an operational amplifier to a feedback branch; the fixed bias amount of the output voltage is changed by adjusting the capacitance value ratio of the input of the operational amplifier to a reference voltage branch; the output signal is only related to the reference voltage, the gain and the input, accurate amplification is obtained when the voltage of the input signal is close to zero, and the problem in amplification when the input signal is close to zero (ground) during light touch in a pressure-resistance change-voltage sensing-based touch schemeis solved.

The invention discloses a correcting device and method for X-ray image digital measurement. The correcting device comprises a base, a longitudinal supporting rod, a transverse supporting rod, a straight edge and two metal balls, wherein the longitudinal supporting rod is fixed on the base; the longitudinal supporting rod and the transverse supporting rod are connected and can slide mutually, and the transverse supporting rod can rotate in the horizontal plane and the vertical plane; the straight edge is connected with one end of the transverse supporting rod, and the straight edge can rotate in the horizontal plane and the vertical plane; the two metal balls are respectively arranged at one end of the straight edge, and the centers of the two metal balls coincide with the calibration starting point and the calibration ending point of the straight edge respectively; the straight edge is made of plastic and is provided with metal calibrations. According to the correcting device for the X-ray image digital measurement, a reference substance of the balls is provided, so that the measurement errors caused by different irradiation directions due to non-sphere shape characteristics are eliminated, the computation of magnification can be more simplified, and more accurate magnification can be obtained. According to the correcting device and method for the X-ray image digital measurement, the femoral head and femoral neck can be conveniently and accurately measured.

The invention discloses a microcontroller for field orientation control of a motor. The microcontroller comprises a processor, a memory cell, a clock generation unit, a mathematic coprocessor, a programmable analogue amplifier unit, an analog-to-digital converter and a bus unit, wherein the processor, the memory cell, the clock generation unit, the mathematic coprocessor, the programmable analogue amplifier unit, and the analog-to-digital converter are connected through the bus unit.

The invention discloses a power channel inspection method based on a fuzzy path, which comprises the following steps: Step 1: Obtain the fuzzy path information required for the power channel inspection from a map; Step 2: Send the path information to no one in a wireless manner machine; Step 3: The UAV flies to the vicinity of the first inspection point in the path, recognizes the target based on machine vision, and judges the position and height of the UAV itself according to the parameter characteristics of the target; Step 4: None After the man-machine reaches the designated position and height, adjust the proportion of the target in the screen through the focal length adjustment algorithm and take pictures and identify defects; Step 5: Repeat Step 3 and Step 4 until the inspection operation of all path points is completed; Step 6: The UAV returns and lands. The inspection method simply selects key path points on the map to form a fuzzy path information, eliminating the need for manual collection of path information or 3D point cloud data to set path information, saving manpower and material resources and improving efficiency.

The invention discloses a method for calibrating a strain multiplier. The method comprises the following steps of: a, mounting the strain multiplier on a test piece; b, loading force to the test piece, so that the test piece strains; c, acquiring a strain value epsilon b of the strain multiplier and a strain value epsilon s of the test piece; and d, determining an amplification factor of the strain multiplier according to the strain value epsilon b of the strain multiplier and the strain value epsilon s of the test piece; wherein in the step a, a first strain piece is arranged on the test piece; and in the step c, the strain value epsilon s of the test piece is acquired by measuring a strain value of the first strain piece. Due to the technical scheme, because the strain value epsilon s of the test piece is obtained by directly measuring the strain value of the first strain piece which is arranged on the test piece, deviation is hardly present, and the obtained amplification factor of the strain multiplier is accurate; therefore, a using effect of the strain multiplier is improved.

The invention discloses a surrounding line signal detection method and circuit, a self-walking device and a mowing system. According to the method, after signals obtained by the signal receiving end of the self-walking device are subjected to multi-stage amplification and multi-stage anti-aliasing filtering, the signals within the set frequency range in the signals obtained by the last stage of anti-aliasing filtering are recognized, and the signals within the set frequency range are decoded, so that the surrounding line signals are obtained. According to the invention, by using multi-stage anti-aliasing filtering and multi-stage amplification and cooperatively using a digital phase-locked loop to analyze the frequency, the surrounding line signals can be amplified, and interference signals with different frequencies can be filtered. Compared with an existing mode of directly carrying out primary amplification and / or filtering, the anti-interference capability of the self-walking device with the brush motor is improved, particularly, the problem of signal interference generated when the self-walking device with the brush motor works can be effectively solved, and the identificationaccuracy of the surrounding line signal is improved.