43results about How to "Calibration results are accurate and reliable" patented technology

This invention relates to an automatic calibration method and a device for radio frequencies of TD-SCDMA/3G mobile terminals, which can calibrate RF, emission power and received gain of mobile terminals automatically and store the calibrated results in NVRAM in the way of files with FFS. This invention can adjust the RF performance of terminals effectively mainly to current TD-SCDMA mobile terminals that their chips do not have the same control attribute.

The invention discloses a system and a method for measuring frame delay time of a photographing system of an optical measurement device. The system comprises an image recording apparatus (1), a photographing system (2), a timing terminal (3), a control and display LED (Light-Emitting Diode) lamp array apparatus (4) and an LED lamp array (5). The method comprises the following steps of: judging the number of image outputting delay frames of a video camera, according to the time information on a digital image output by the photographing system and the information of the LED lamp array; providing time and external interruption signals by the timing terminal; recording the image of the photographing system and superposing the time information of the recording moment by the image recording apparatus; controlling an LED array to turn on or turn off the LED lamps by the control and display LED lamp array apparatus according to the external interruption signal and the time information; and imaging the LED array by the photographing system. The system and the method provided by the invention realize accurate calibration on image outputting delay time of the photographing system.

The invention discloses a dynamic calibration method for a portable braking tester and comprises the following steps: a. an acceleration sensor of the braking tester to be calibrated is mounted on a fixed mechanism of the acceleration sensor; b. a control processing module controls a driving mechanism, and a rotating shaft is driven by the driving mechanism to rotate; c. an angle sensor transmits angle signals of the rotating shaft tested at different times to the control processing module, and the braking tester transmits acceleration signals tested at different times to the control processing module; d. the control processing module calculates an actual deceleration-time curve according to the input angle signals and an actual measurement deceleration-time curve of the braking tester according to the input acceleration signals, and by comparing the two curves, calculates the MFDD indication error. The method has the advantages of exact and reliable calibration result, high calibration efficiency, high operability and repeatability, can guarantee the personal and property safety, and greatly reduces the cost of dynamic calibration.

The invention relates to a trace dissolved oxygen tester on-line calibrating device and a calibration method thereof. The method is based on the Faraday's law of electrolysis, and the device comprises a fiber filter, a flow control system, a Faraday electrolysis device, dissolved oxygen measurement equipment and a control device. The trace dissolved oxygen tester on-line calibrating device and the calibration method thereof are reliable in design theory, simple and convenient in method and great in operability. According to the trace dissolved oxygen tester on-line calibrating device and the calibration method thereof, field sample water is used, the process of preparing ultra-pure water is omitted, and the process of taking out an oxygen electrode is avoided through on-line calibration. Water electrolysis efficiency is measured on line, so that electrolysis efficiency variation caused by water sample variation and instability of an electrode can be tracked, and the calibration result can be more accurate and reliable. Calculation of electrolysis efficiency of the field sample water is applied to a high precision gauge pressure sensor, and accuracy of electrolysis efficiency calculation is guaranteed.

The present invention provides an ultra-short baseline system for underwater positioning in shallow waters. The system includes an underwater array, a deck control unit, an attitude sensor and a satellite positioning device; after being fully configured, the satellite positioning device and the attitude sensor are fixed to a mother ship; the satellite positioning device and the attitude sensor establish data connections with the deck control unit; the underwater array is fixedly connected with the mother ship through a mounting frame; the underwater array has an initial mounting angle with respect to a mother ship coordinate system; and the degrees of the initial mounting angle are determined according to a condition that ensures the predetermined trajectory of an object to be positioned to be near the middle position of the detection opening angle of the underwater array. According to the calibration method of the invention, on the basis of the global optimization of a genetic algorithm, the approximate value of the exact solution of a calibration equation is obtained and is adopted as the initial value of the iterative solution of the Gaussian-Newton least squares method, and therefore, a calibration result can be more accurate and reliable.

The invention discloses a method for measuring and calibrating atmospheric transmissivity. According to the method, a stabilizing pilot platform is mounted on an aircraft; an LEG light source capable of emitting light stably and a laser head are arranged on the stabilizing pilot platform; the aircraft is capable of automatically executing a flight task and stably hovering; and a ground measurement device comprises a ground station computer, a two-dimensional tracking platform and a telescope arranged on the two-dimensional tracking platform. According to the method, an atmospheric transmittance and atmospheric attenuation coefficient on a measured path can be calculated by adopting a mathematic processing method for measuring dense sampling on a measured path and comparatively calculating the measurement data, so that influence of calibration error of a target light source and a measurement instrument can be eliminated, and the measurement accuracy of atmospheric transmittance can be improved.

The invention provides a set for calibrating a tester of an arrester counter. The set comprises a standard impact generator, a direct-current boost control circuit, a standard power frequency source, a data collecting module, a comprehensive intelligent processing unit, control buttons, a liquid crystal display and an upper computer waveform analysis module. The data collecting module, the control buttons, the liquid crystal screen and the upper computer waveform analysis module are all connected with the comprehensive intelligent processing unit. The standard impact generator is used for generating impact voltage wave or impact current wave according to preset voltage preset via the control buttons; the standard impact generator is used for generating standard power frequency current; the signal output end of the standard impact generator and the signal output end of the standard power frequency source are connected with the data collecting module. The set has the functions of outputting and measuring impact voltage and current and outputting and measuring power frequency voltage and current, is small in size, light in weight and convenient to carry and allows convenient field testing.

An embodiment of the invention relates to a method for calibrating an optical path of a laser path. The method comprises the steps of forming a first image on an imaging device from a first light beam through a first lens, irradiating a to-be-measured object by a second light beam from a first light source through a reflector and a second lens, and forming a second image of the to-be-measured object on the imaging lens through the second lens and the first lens; and adjusting at least one in direction and pitch of the to-be-measured object until the first image is superposed with the second image at the imaging center of the imaging device.

The invention relates to a calibration method for a pulse reconstruction and tracking type active calibrator. The method comprises the steps that an antenna of the pulse reconstruction and tracking type active calibrator is aligned to a standard reflection disk, the antenna is aligned to the reflection disk according to signals which are reflected by the standard reflection disk two times and received by the antenna, and frequency values corresponding to the signals reflected to times are recorded; the distance between the aligned standard reflection disk and an antenna reference point is measured, and a delay value introduced by a feed source and the antenna and a radio frequency channel delay value are acquired based on the obtained distance value and frequency value; data measured by the pulse reconstruction and tracking type active calibrator are corrected through the two obtained delay values, and calibration is completed. The reference point is the position, irradiated by an infrared distance meter, on the antenna when the antenna is aligned to the standard reflection disk. According to alignment, the infrared distance meter and the reference point are arranged in the same horizontal plane, that is, the distances between the infrared distance meter and the two edges of the antenna in the same horizontal plane are equal.

The invention discloses a dynamic calibrating device of a portable braking tester, which comprises a control treatment module and a stander; a horizontal rotating shaft and a driving mechanism which drives the rotating shaft are movably arranged on the stander, the rotating shaft is provided with an acceleration sensor fixing mechanism and also an angle sensor which moves synchronously with the rotating shaft; and both the driving mechanism and the angle sensor are electrically connected with the control treatment module which is also provided with a connecting port which can be electrically connected with the braking tester to be calibrated. The device can realize dynamic calibration, with accurate and reliable calibration result, high calibration efficiency, and good operability and repeatability, can guarantee personal and property safety, and greatly reduces the cost of the dynamic calibration.

The invention provides a method for dynamically calibrating a magnetic field sensor. The method comprises the following steps: storing original three-dimensional magnetic field data of the magnetic field sensor into a queue with a length of L in sequence; searching out N data meeting a preset condition from the data in the queue with the length of L, and forming a fitting array for ellipsoid fitting operation by the N data; performing the ellipsoid fitting operation according to the fitting array of the N data to fit out six calibration fitting parameters of an ellipsoid; calibrating the original three-dimensional magnetic field data by using the six calibration fitting parameters, so as to acquiree calibrated magnetic field data, and returning to the initial step. The invention provides asystem for dynamically calibrating the magnetic field sensor. The method and the system for dynamically calibrating the magnetic field sensor can dynamically calibrate the magnetic field sensor in real time, and a calibration result is high in reliability and precision.

The invention relates to a wireless transmission multichannel PCR analyzer calibration device and a calibration method thereof. A wireless transmission technology is adopted, workers do not need to bein a high-risk environment for a long time. A plurality of temperature sensors are integrated together by adopting a packaging structure, and the multichannel temperature sensor integrated device ismanufactured. The packaging structure enables the temperature sensor to be immersed in a liquid soaking environment, the liquid soaking environment is used for calibrating the temperature sensor of the calibration device, value tracing and self-calibration during calibration are achieved, errors of the temperature sensor are eliminated and reduced, and it is guaranteed that the calibration resultis accurate and reliable. Therefore, the problems of quantity traceability and self-calibration of the temperature sensor for calibration of the polymerase chain reaction analyzer are solved.

The invention provides a high-temperature heating furnace temperature sensor distribution device and a metering calibration method thereof. The temperature sensor distribution device is arranged, thedistribution requirements of the number of sensors and temperature measurement positions are met through the distribution device, a post-positioned temperature measurement mode is used, and an electric lead of a temperature sensor penetrates out of a rear temperature measuring hole of a high-temperature heating furnace to be detected, so that damage to the electric lead of the temperature sensor when a furnace door is closed in a front temperature measuring mode is avoided, and before the high-temperature heating furnace is calibrated, a temperature control thermocouple and a temperature controller of the high-temperature heating furnace are calibrated to improve the accuracy of a calibration result.

The invention provides a method for conducting partial heat treatment on martensitic precipitated hardening stainless steel after repair welding. The method can solve the problems that in an existing partial heat treatment method, the heating temperature is difficult to control, and the temperature uniformity is poor. An induction heating method is used for conducting partial heat treatment on a repair welded part. The method is characterized in that before partial heat treatment is conducted, the heating temperature for partial heat treatment of the repair welded part is calibrated, through calibration of the heating temperature for partial heat treatment, the difference between the temperature of a surface infrared temperature sensor and the inner temperature of the part in the heating process is determined, and according to the temperature difference, the actual heating temperature for induction heating in the partial heat treatment process is determined.

The invention discloses an automatic calibrating device of an optometry lens box. The automatic calibrating device comprises a lens meter, a three-axis manipulator, a bracket, two linear laser markingmachines, two video cameras, a buzzer, a lower computer and a supervisory computer with automatic calibration software, wherein the lens meter, the three-axis manipulator and the bracket are fixed ona table top; the two linear laser marking machines and the two video cameras are fixed on the bracket; the lens meter is used for displaying collected measuring information of lenses on a screen; thehand part of the manipulator is an electric clamping jaw with two claws, and can clamp lenses put on the surface of a lens supporting seat and perform moving or rotating; the laser marking machines are used for marking a geometric center position of the lens supporting seat on the lens; camera lenses of the two video cameras are aligned to a screen of the lens meter and the lens supporting seat;the collected measuring information of the lens meter and lens image information are transmitted to the supervisory computer through the lower computer; the buzzer is used for sending different buzzers when the calibration is completed and manually completing the operation of calibration is needed; and the supervisory computer is used for operating the software and controlling the lower computer to complete the automatic calibration process. Through the adoption of the automatic calibrating device disclosed by the invention, the automation of calibration is realized, and the calibration resultis accurate and reliable.