699results about How to "Achieve calibration" patented technology

The invention relates to an automatic testing system and an automatic testing method of a continuous wave radio frequency power amplifier. The method comprises contents 1 that a computer is used for via a communication bus comprehensively managing devices such as an instrument power supply, a signal source, a power meter, a spectrum analyzer, a network analyzer, a radio frequency management and interface control unit, and a power amplifier, and automatically measuring power characteristic, saturation power, gain characteristic, output stationary waves, flatness characteristic, harmonic suppression, spurious suppression, cross modulation characteristic, group delay, and AM/PM characteristics of the radio frequency power amplifier, 2 that calibration of a radio frequency input access and a radio frequency output access is achieved; 3 that the radio frequency management and interface control unit provides all radio frequency accesses, cables are not required to be detached and radio frequency ports are not required to be replaced when indexes are tested, and TTL level, 422 level, relay driving, a serial port, and a LAN bus remote control interface are provided for different power amplifying single machines, and power amplifying transmission and reception, wave band remote control, and state monitoring are achieved; 4 and that system software modular design is achieved.

The invention relates to a noninvasive radiotherapy system for a robot, and belongs to the medical equipment field. The noninvasive radiotherapy system for the robot consists of seven modules, i.e. a radiotherapy planning system, a three-dimensional numerical-control therapy bed, an automatic tracking system for a four-dimensional real-time image, a robot system, a radioactive source, an adjuvant therapy system and an integrated control system, wherein the automatic tracking system for the four-dimensional real-time image consists of a six-freedom-of-degree G-shaped arm real-time image system and an intelligent tracking system; the six-freedom-of-degree G-shaped arm real-time image system is formed by successively connecting a G-shaped arm, a G-shaped arm sliding rail, a G-shaped arm spindle, a G-shaped arm pitch shaft and a G-shaped arm sliding seat; an X ray source and an X ray dynamic flat panel detector are formed into one group, and two groups are correspondingly installed on the G-shaped arm; and the G-shaped arm sliding seat is installed in a rail (9). According to the noninvasive radiotherapy system for the robot, which is disclosed by the invention, the defects of unmatched projection time, time waste and low therapy precision in the prior art are overcome, the precise therapy of the whole body tumor can be carried out, and the cardiovascular disease therapy and the noninvasive regulation of the renal nerve disease can be carried out.

The invention relates to a device for calibrating a multi-spectral axis calibrator with a discrete optical axis and belongs to the field of optical measurement. A semi-transmitting and semi-reflecting mirror, a laser and a charge-coupled device (CCD) camera are integrated in a collimator tube; an optical axis of the CCD camera is vertical to that of the collimator tube, and an object point of theCCD camera is positioned at an equivalent focal point of the collimator tube; and an electric cross which is generated by the CCD camera is displayed by a display. During self-calibration, an emergent light beam of the collimator tube is vertically irradiated on a plane reflecting mirror and reflected and then forms a self-calibration image on the display; and during the calibration measurement of the axis calibrator, after an infrared channel or a visible light channel of the measured axis calibrator is aligned with the collimator tube, the laser emits laser to a laser channel of the measured axis calibrator, and the parallel misalignment of the laser and the infrared channel or the parallel misalignment of the laser and the visible light channel is obtained by a data processing system of the laser channel. The device is applicable to calibration of the multi-spectral axis calibrator with the discrete optical axis and has the characteristics of simple calibration method, objective calibration result, reliability and the like.

The invention relates to a panorama three-dimensional laser sensor data calibration method and apparatus. The apparatus includes a three-dimensional laser sensor and a calibration device. The method includes the following steps: firstly, dividing scan data of a two-dimensional laser sensor into two parts on average on the basis of the positive portion and the negative portion of a yL axis, then forming a laser scan plane, and forming two pieces of space three-dimensional point cloud data by the positive and negative laser data of the yL axis when a rotary holder drives the two-dimensional laser sensor to rotate 360 degrees; secondly, extracting laser data characteristic points needed by calibration from the two pieces of space three-dimensional point cloud data; and thirdly, optimizing distances among the laser points in the two pieces of space three-dimensional point cloud data, and then obtaining a calibration parameter. The problems of uncontrollable human errors and long time caused by hand-operated click matching are solved, factors that are likely to affect the data precision are fully considered, the calibration precision of the sensor is improved, and the universality of the calibration method is improved.

The invention discloses a calibration system for a heliostat of a solar generating station, which comprises a receiver, a heliostat field, an image sensor group and a control unit, wherein the heliostat field is arranged at the periphery of the receiver; the image sensor group is used for capturing a reflecting light spot radiated by a calibration light source onto the heliostat; the image sensor group can be movably arranged between the receiver and the heliostat field; at least one part of a reflecting image of the heliostat to be calibrated falls within the acquisition range of the image sensor group; and the control unit is used for acquiring the central position of the light spot reflected by the heliostat according to image information of the image sensor group and finally obtaining an error value of the heliostat to be calibrated. According to the calibration system disclosed by the invention, the central position of the reflecting light spot of the heliostat is determined by the movement of the image sensor group; and the calibration system has the advantages of high calibration speed, small mechanical error and improved calibration precision. The invention also discloses a calibration method of the calibration system.

The invention discloses a calibration system of humidity-temperature sensor, comprising a calibration chamber of which the top is provided with multiple to-be-measured sensor sockets for mounting to-be-measured sensors; an environmental chamber arranged below the calibration chamber and comprising a saturated salt solution container that is used for holding saturated salt solution and arranged in the heat transferring medium of a water bath tank, and the water bath tank; a temperature control chamber arranged below the environmental chamber and used for fast heating or cooling the water bath tank; a thermal container which is used for keeping the measurement environment stable and in which the calibration chamber, the environmental chamber and the temperature control chamber are arranged; and a control circuit for controlling the heating or cooling of the temperature control chamber. The invention also discloses a calibration method of humidity-temperature sensor. The invention realizes the calibration of humidity-temperature sensor by the same system, and is compactly structured, simple and practical. The calibration has small time consumption and is convenient for practical operation. The calibrating device of the invention is simple, has small volume, can realize portable measurement, has cheap material and low cost, and can be popularised and applied in large scale.

The invention provides a broadband terahertz source radiant power calibration device and method. A terahertz source capable of being tested is a terahertz source with a light beam divergence angle larger than 1.732 degree and the spectral region ranging from 30 micrometer to 3000 micrometer. According to the broadband terahertz source radiant power calibration device and method, the measurement method that radiation parameters of a standard terahertz source are compared with radiation parameters of the to-be-tested terahertz source is adopted; after radiation of the standard terahertz source or the to-be-tested terahertz source enters a low temperature vacuum background channel through a terahertz transmission window, the radiation and background radiation of a liquid nitrogen refrigeration black body are alternatively modulated through a light chopper sheet into periodically-changed terahertz radiation signals, are gathered through a Cassegrain system, income a terahertz detector through a terahertz spectrum light filter, are converted into periodically-changed voltage signals, and are processed through a lock-in amplifier to obtain stable measuring voltage signals. The radiant power of the to-be-tested terahertz source is obtained through calculation according to the radiant power correction factors obtained by measuring a weak radiation source or a strong radiation source, and meanwhile the radiation luminance of the to-be-tested terahertz source can be obtained through calculation.

The invention relates to an automatic calibration method. The method comprises the following steps of: a, introducing a gas sample into an analytical instrument and continuously analyzing the gas sample; b, when calibration is needed, switching a gas flow path to a calibration flow path by a control unit, controlling the flow of standard gas and diluent gas by the control unit, preparing calibration gas with specified concentration, and introducing calibration gas into the analytical instrument to obtain calibration data; and generating a new calibration result according to the calibration data; and c, switching the gas flow path to a gas sample flow path by the control unit, and continuously analyzing the gas sample by using the new calibration result until calibration is needed. The invention also provides an automatic calibration device. The invention has the advantages that: a dilution ratio range is wide, the volume is small, remote control and automatic calibration can be realized and the like.

The invention provides a pressure sensor calibration method. The method comprises the following steps: S1, setting the temperature of a to-be-calibrated pressure sensor; S2, inputting different pressures into the pressure sensor at the temperature set in the S1; S3, acquiring response values of the pressure sensor under different pressures input in the S2; S4, acquiring a linear relation between the pressures input in the S2 and the corresponding response values in the S3; S5, determining the accuracy of the pressure sensor according to the linear relation acquired in the S4. With adoption of the pressure sensor calibration method and a pressure sensor calibration device, the pressure sensor working under different temperature conditions can be calibrated, additional measurement error is not introduced, meanwhile, the system complexity is not increased, and the whole device is safe, reliable and higher in universality.

The invention relates to a calibration method of an aerial remote sensing integrated system, relating to the aerial remote sensing integrated system. Based on high-precision camera calibration and combined navigation data calculation, the calibration of the aerial remote sensing integrated system of a high-precision system is performed, and the calibration method comprises the steps of: (1), recording attitude information by using POS, converting the attitude information to obtain an initial value of an image direct geo-location exterior orientation element, acquiring the exterior orientation element as a true value by a monolithic resection method, and calculating the exterior orientation element; (2), checking multi-sensor data by using a position attitude parameter based on the POS and a method for cross validation of the exterior orientation element based on GPS (Global Position System) auxiliary aerial three methods; and (3), recording the attitude information by using the POS, converting the attitude information to obtain the image direct geo-location exterior orientation element, absolutely orienting by using control points directly, and uniformly acquiring field check points in a calibration field for verification. According to the calibration method provided by the invention, high-precision detection and calibration on the aerial remote sensing integrated system can be realized.

The invention discloses a device for measuring the characteristics of a microphone. The device for measuring the characteristics of the microphone comprises a signal generating module, a sound transmission tube, a standard microphone and a data acquisition and processing module; wherein the signal generating module generates a corresponding acoustical signal according to the electrical signal with a particular frequency; the sound transmission tube transmits the acoustical signal to the other end of the sound transmission tube from the end which the source located in with the form of plane waves with the particular frequency; the standard microphone and the microphone to be measured are respectively inserted into the tube wall of the the sound transmission tube, used for collecting the acoustical signal in the sound transmission tube and converting the acoustical signal to an electrical signal and sending; and the data acquisition and processing module obtains the phase difference between the microphone to be measured and the standard microphone according to the phase measured by the standard microphone and the phase measured by the microphone to be measured, obtains the amplitude of the standard microphone based on the electrical signal sent by the standard microphone, and obtains the sensitivity of the microphone to be measured based on the amplitude and the electrical signal measured by the microphone to be measured. According to the invention, the measuring and calibrating of multiple microphones is realized at the same time, and the phase and sensitivity of the microphone are measured and calibrated at the same time, therefore, the cost is saved, and the efficiency of measurement and calibration is improved.

The invention discloses a heliostat calibration method for a solar power station. The heliostat calibration method comprises the following steps of: obtaining a deviation ei between a heliostat reflective light-spot center position and a receiver center through the movement of an image sensor, and controlling a heliostat to rotate to a nominal position; comparing the distance deviation ei with a set deviation value di so as to judge the deviation size of the heliostat; when the deviation of the heliostat is smaller, just calibrating fewer calibration errors; and when the deviation of the heliostat is larger, then calibrating more calibration errors. The invention further discloses a heliostat calibration system using the calibration method. According to the heliostat calibration method and the heliostat calibration system, disclosed by the invention, the image sensor is used for determining the heliostat reflective light-spot center position, so that the calibration action is fast, the mechanical error is small and the calibration precision is improved. Furthermore, according to the heliostat calibration method and the heliostat calibration system, disclosed by the invention, the calibration is carried out in a manner of determining calibration parameters through firstly judging the deviation size of the heliostat, so that the calibration efficiency and the calibration precision are improved.

The invention provides a comprehensive real-time calibration method for a multi-channel digital anti-interference antenna system, which can effectively increase output signal to noise ratio of the system. The method is implemented by the following technical scheme and comprises the following steps: connecting an antenna array surface, channels and a signal processing plate between a power supply and a computer to form a self-calibration antenna system; transmitting a near-field signal and a far-field signal by using a transmitting antenna and a standard antenna at different time, calculating difference between amplitude and phase of two groups of signals output by a receiving channel and storing the difference value into FLASH; controlling the channels and the signal processing plate by using a computer through a serial port so as to be in a calibration state and performing system calibration by comparing the amplitude and the phase of the signal of each channel by a calibration algorithm stored in a field programmable gate array (FPGA); and providing analog inertial navigation information to the signal processing plate by using the computer through the serial port, automatically adjusting the main beam of the antenna according to the inertial navigation information by an anti-interference algorithm in the FPGA, and inhibiting the antenna to receive each external interference signal. According to the method, high efficiency and sustainability of system operation are guaranteed.

The invention discloses a non-polarization beam splitter-based Rayleigh scattering Doppler frequency discriminator for F-P (Fabry-Perot) etalons. The discriminator comprises a signal fiber, a laser transmission frequency zero-point calibrating fiber, a non-polarization beam splitter, a reflecting prism, a Fabry-Perot etalon and a detector. The prior high amount of splitters and reflectors are replaced with the splitting and reflecting prisms, thus the structure of the discriminator is simplified. The prisms are integrally connected under intermolecular action, and fewer optical interfaces for passage of light are used; all fiber ends are coated with antireflection films, signal loss of the discriminator is lowered, and optical efficiency is improved. The prims are non-sensitive to polarization of incoming light, thus measuring precision is improved. By adding the laser transmission frequency zero-point calibrating fiber, an error between laser transmission frequency and etalon zero-point is calibrated. A zero-air-velocity calibration signal and an atmospheric echo signal share the set of primes and are isolated by the optical switch.

The invention discloses a weighing system and a weighing method having the self-calibration function. The system comprises an initiation unit and a calibration processing unit, wherein the initiation unit is used for storing effective zones, the effective zones comprise multiple data points confirmed by object weight values and current values, the calibration processing unit is used for acquiring a standard weight value of any standard object and determining whether data points confirmed by the standard weight value of the standard object and a current value acquired during measuring the actual weight value of the standard object are in the effective zones, if yes, weighing precision satisfies requirements, otherwise, weighing precision does not satisfy the requirements, and the standard object is a weighing empty bucket or the weighing empty bucket plus known-weight objects. Through the system, whether weighing precision satisfies the requirements is automatically determined.

The invention relates to an optical axis and mounting reference surface parallelism test device. The device comprises an optical collimation system, a CCD image sensor, an image acquisition card and a computer, wherein a focal plane of the optical collimation system is provided with an upper conversion plate, laser spots are converted by the upper conversion plate into visible light spots, the visible light spots after conversion correspond to the original laser spots in one-to-one correspondence mode, parallelism test of a detected system is carried out through processing on the light spots, and calibration is further carried out. The invention further relates to a method. The method comprises steps that a), light spot image processing is carried out; b), a rectangular location zone of the light spots is determined; c), a light spot mass center is solved; d), an electric cross division center is queried; e), offset of the light spot mass center is solved; f), the offset amount is calculated; g), a magnifying power is calculated; and h), an offset included angle is acquired, and calibration is carried out. According to the device and the method, parallelism test and calibration of an optical axis of a laser illuminator are realized, and advantages of more convenient detection and high precision are realized compared with a detection method in the prior art.

The invention discloses a calibration method of a double-probe flying probe testing device. The method comprises the steps of obtaining a first coordinate of a fixed probe when the probe rotates for 0 degree from an original point of a rotating shaft thereof, a second coordinate while rotating for 90 degrees, and a third coordinate while rotating for 180 degrees; obtaining a fourth coordinate of a mobile probe when its distance to the fixed probe is an initial distance, and a fifth coordinate when its distance to the fixed probe is a preset distance; obtaining coordinates of a camera unit; obtaining the distance from the fixed probe to the camera unit when the distance between the fixed probe and the mobile probe is a first distance and the included angle between the connection line of the fixed probe and the mobile probe and the X axis is a first angle according to the first coordinate, the second coordinate, the third coordinate, the fourth coordinate, the fifth coordinate and the coordinate of the camera unit; and calibrating the double-probe flying probe testing device according to the distance from the fixed probe to the camera unit. Therefore, calibration of positions of double probes is achieved, and the condition that the double probes can accurately stab corresponding points on a tested circuit board is ensured.

The embodiment of the invention discloses a calibration method and device of a coverage database. The method of the embodiment of the invention comprises the following steps: a measurement control message is sent to a terminal in a network coverage area, and the measurement control message is the information indicating the geographic position of the terminal which is carried by the terminal supporting a global positioning system (GPS) in a reported measurement report; the measurement report sent by the terminal is received; and if the measurement report contains signal strength and the geographic position information, the district signal strength and the geographic position information of the terminal are stored in the coverage database. With the scheme disclosed by the invention, the calibration time and the calibration cost are reduced, and the positioning technology is convenient to apply and popularize.

The invention relates to a method for automatically measuring and correcting a welding gun gesture of a welding robot. The method comprises a welding robot and is realized according to the following steps of: S1: building a hardware environment; S2: establishing a coordinate system; S3: according to time recorded by a controller, calculating a trajectory circle center O1 coordinate (d<x1>, d<y1>);S4: according to the time recorded by the controller, calculating a trajectory circle center O2 coordinate (d<x2>, d<y2>; S5: using a spatial vector to calculate the gesture, compensating an originaltool TCP (Tool Center Point) gesture, and then, regulating the gesture of a tool; S6: enabling a welding robot TCP to carry out constant speed circular motion around the original point of the coordinate system of a sensor at the same angular speed by the same radium to obtain that Ox-Os is equal to (0, 0, 0); and S7: calculating an offset, and feeding back the offset to the inside of the weldingrobot to realize TCP automatic correction. A high-accuracy sensor is adopted to carry out non-contact measurement, so that the measurement and the calibration of a tool coordinate system can be accurately realized, calibration time is shortened, and the accuracy of a measurement result and the accuracy of a welding motion trajectory are improved.

The embodiment of the invention provides an antenna calibration method and a device thereof. The method comprises the steps as follows: a calibrating signal processing module of a base station NodeB utilizes usable time frequency resource to generate a calibrating signal; the calibrating signal passes through an RF (radio frequency) transceiver module and a calibration RF transceiver module of the NodeB and then is returned to the calibrating signal processing module; and calibration factors are obtained according to the returned calibrating signal and calibrating adjustment is carried out according to the calibration factors. The antenna calibration is realized by returning the calibrating signal sent by the NodeB to the NodeB and does not need UE assistance, and therefore the antenna calibration can be realized without the support of air interface signaling.