56results about How to "Meeting Calibration Needs" patented technology

The invention provides a device and method for calibrating a non-contact type electrostatic voltmeter. The method includes the steps that a direct-current high-voltage power supply and metal plate electrodes are utilized to acquire a standard static filed at local space near the centers of the electrodes, the voltage of the non-contact type electrostatic voltmeter can be traced to the direct-current voltage standard, and an experimental method that the edge effect is increased is adopted to test the edge effect of the metal plate electrodes. The risks that people get an electric shock are reduced through a glass flat plate support which bears the metal plate electrodes and through a protective resistor, and a perpendicular moving mechanism can adjust the test distance of a calibrated meter. A detachable vernier caliper is adopted, and therefore tracing is convenient to conduct.

The invention provides a calibration device and method for color gamut and color gamut coverage ratios. The device comprises a control center, an integrating sphere light source, a rotatable filter wheel and a color analyzer, wherein the integrating sphere light source and the color analyzer are in communication connection with the control center, and light emitted by the integrating sphere light source enters the color analyzer through the filter wheel. The structural mode of the integrating sphere light source, the rotatable filter wheel and the color analyzer is adopted, synchronous calibration of the color gamut and the color gamut coverage ratios is performed on the output light, special treatment of shading is performed on an output port of the integrating sphere light source, and the influence of stray light on measurement results of the color analyzer is eliminated, so that the monochromaticity and the saturability of the output light are improved, and the accuracy, the stability and the repeatability of calibration of the color gamut and the color gamut coverage ratios are improved.

The invention belongs to the technical field of dissolved oxygen sensors calibration and discloses an optical dissolved oxygen sensor in-situ self-calibration device which comprises a calibration gasgenerator and a calibration device underwater part; the calibration gas generator comprises a saturated air bottle, a high-purity nitrogen bottle, a quality flow controller and a water removal device;the calibration device underwater part comprises a calibration test box, a dissolved oxygen sensor to be calibrated in the calibration test box and a temperature, humidity and air pressure sensor; and the calibration test box is provided with a water inlet, a water outlet and a gas inlet. By adopting the optical dissolved oxygen sensor in-situ self-calibration device and method, by using gas calibration to replace solution calibration, the proportioning process of gradient water bodies with different dissolved oxygen concentrations in a solution is simplified, so that the calibration flow canbe simplified, the calibration time can be saved, and the accuracy of calibrating a reference oxygen concentration in situ is improved; adopted calibration gas cannot cause atmospheric pollution after diffusing in air; and in-situ self calibration is realized with an important role of improving the quality of data monitored with the dissolved oxygen sensor in situ and prolonging the in-situ maintenance-free running time.

The invention discloses a calibration device (100) for high-speed data transmission baseband test equipment. The device is characterized in that the device comprises a bit error rate parameter verification unit (110), a demodulation loss parameter calibration unit (120) and a Doppler frequency calibration unit (130), and the bit error rate parameter verification unit (110) is used for obtaining abit error rate test result and verifying a bit error rate; the demodulation loss parameter calibration unit (120) respectively calibrates signal energy and noise energy by measuring the signal power and the noise power to obtain a measurement result of the signal to noise ratio; and the Doppler frequency calibration unit (130) is used for quickly capturing Doppler frequency, controlling the sampling time sequence through computer software, dynamically tracking the maximum frequency value in real time, and calculating to obtain the maximum frequency offset.

The invention provides a calibrating device of a three-dimensional electrostatic field meter. The calibrating device comprises a direct current high voltage power supply, a protective resistance, direct current high voltage power supply controller, metal parallel pole plates, an electric field meter fixture, a three-dimensional rotating mechanism, a laser range finder, a camera shooting monitoringstructure and a electromagnetic shielding structure; the three-dimensional rotating mechanism comprises a fixed station, a universal driving shaft, a stepping motor, a rotary transformer, a central processing unit and a displacement sensor, wherein the central processing unit controls an output shaft of the stepping motor to rotate through the rotary transformer so as to drive the calibrated three-dimensional electric field meter to rotate in an open hole; and the camera shooting monitoring structure is used for collecting electric field intensity displayed by the calibrated three-dimensionalelectric field meter, the electric field intensity is compared with the electric field intensity of a standard electric field obtained by calculating the distance of upper and lower pole plates obtained by the laser range finder and output voltage of a direct current high voltage power supply, and calibrating is carried out according to compared results. The calibrating device of the three-dimensional electrostatic field meter can avoid external electromagnetic interference and influence of environmental temperature and humidity, and meet calibrating requirements of the three-dimensional electrostatic field meter, and thus, high practicability is achieved in the use of a metering calibrating mechanism.

The invention provides a long-distance large-range optical fiber strain generating device. The device comprises a dual-frequency laser interference length measuring device light source, a detector and a full reflection device, wherein the dual-frequency laser interference length measuring device light source and the detector are fixed to a left clamp carrier platform, the full reflection device is fixed to a right clamp carrier platform, and the dual-frequency laser interference length measuring device light source, the detector and the full reflection device form a distance measuring laser light path which is used for measuring the optical fiber distance and the optical fiber strain value. By means of the scheme, a sliding rail is moved for a long distance so that distance measurement is changed into displacement measurement. The original length and the stretching length of an optical fiber strain generation portion can be precisely measured through the high-precision long-distance dual-frequency laser length measuring device. Strain is generated precisely through an electric control displacement platform. Strain generation precision is improved and the optical fiber length is increased, and the defects that an existing strain generating device is low in precision and short in optical fiber operation distance.

The invention belongs to the field of technologies for preparing standard gas, and relates to a device and a method for preparing hydrogen-deuterium standard gas. The device comprises a hydrogen raw gas steel cylinder, a deuterium raw gas steel cylinder, a hydrogen delivery pipeline, a deuterium delivery pipeline, a gas delivery main pipeline, a gas delivery bypass pipeline, a general pressure gauge, high-precision pressure gauges, a gas distribution cylinder, a vacuum unit, a mass comparator, a reference gas cylinder and valves. The device and the method for preparing the hydrogen-deuterium standard gas have the advantages that the low-abundance hydrogen-deuterium standard gas (with the deuterium abundance lower than or equal to 1%) can be prepared by the aid of gravimetric processes under the condition of high preparation precision requirements, and the medium and high-abundance hydrogen-deuterium standard gas (with the deuterium abundance higher than 1%) can be prepared by the aid of volumetric processes under the condition of the high preparation precision requirements; the hydrogen-deuterium standard gas can be prepared by optional one of the gravimetric processes and the volumetric processes under the condition of low preparation precision requirements.

The invention relates to the technical field of Internet of Things communication, and specifically relates to a NB-loT pilot signal generation device and a pilot signal generation method thereof. An output end of a NB-loT pilot baseband generation unit is connected with an input end of an intermediate control unit; the output end of the intermediate control unit is connected with one input end of a mixer; another input end of the mixer is connected with an output end of a first local oscillator unit; the output end of the mixer is connected with one input end of another mixer; another input end of the other mixer is connected with a second local oscillator unit and outputs a radio frequency signal; an output end of another mixer is connected with an input end of a controllable filter unit, an input end of a gain regulation unit and an input end of a fixed gain amplifier unit in sequence; and the output end of the fixed gain amplifier unit outputs a high power radio frequency signal. Compared with the prior art, the frequency coverage range of a NB-loT signal is satisfied through multi-level frequency conversion of a radio frequency channel.

The invention discloses a fixed-point temperate plateau technique based standard blackbody radiation source, which comprises a shell, wherein a temperature control flow passage inlet penetrates into the shell, and is connected with a helical heating pipeline; the helical heating pipeline is wound around a fixed-point crucible, and is communicated with a temperature control flow passage outlet; thetemperature control flow passage outlet penetrates through the shell; temperature control liquid flows in from the temperature control flow passage inlet, and flows out from the temperature control flow passage outlet after passing through the helical heating pipeline; thus, the temperature of an overall device is controlled; the interior of the fixed-point crucible is made from high-purity gallium metal; a cavity is enclosed by the high-purity gallium metal; a rear temperature compensator is also arranged inside the shell, and is connected with a uniform temperature block; the uniform temperature block is connected with the left end of the fixed-point crucible; the rear temperature compensator is used for carrying out temperature compensation on the uniform temperature block, and further, is used for carrying out the temperature compensation on the fixed-point crucible; the right side of the fixed-point crucible is in contact with a diaphragm; and the diaphragm is connected with a front temperature compensator.

The invention provides a radio-frequency signal calibration method based on virtual channels, comprising a channel modeling module, a channel calibration module, an error correction module and an information management module. First, the channel modeling module is run to establish a virtual channel model for channels ready for calibration, and channel model information is synchronized to the information management module; the channel calibration module is run to calibrate all the channels; a calibration program generating guide is provided for a user according to the channel model information; a calibration program generated by the guide is run to obtain calibration data, and the calibration data is synchronized to the information management module; then, the error correction module is run; and finally, an error correction algorithm interface function is called during running of a test program to obtain a radio-frequency signal compensation value at a specified frequency of a specified channel to compensate channel calibration error in the process of testing. All the modules have clear functions, operation is simple and convenient, channel management and error correction are completely open, and the channel calibration needs of a test system in different stages are met through extension.

The invention provides a novel partial-pressure mass spectrometer calibration device, which mainly comprises a fine adjustment valve, a piston pressure meter, a sample preparation chamber, a pluralityof high-purity gas cylinders, a capacitive film vacuum meter, a first-stage sample feeding chamber, a second-stage sample feeding chamber, a sampling chamber, a small hole, a calibration chamber, a separation gauge and an air pumping system. The sample preparation chamber is respectively connected with the piston pressure meter and the capacitive film vacuum gauge. The sample preparation chamberis also connected with the plurality of high-purity gas cylinders which are connected in parallel through the fine adjustment valve. A plurality of sampling chambers with different volumes are connected between the sample preparation chamber and the first-stage sample feeding chamber in parallel. A plurality of sampling chambers with different volumes are connected between the first-stage sample feeding chamber and the second-stage sample feeding chamber in parallel. The second-stage sample feeding chamber is sequentially connected with the small hole and the calibration chamber in sequence. The calibration chamber is respectively connected with a to-be-calibrated differential pressure mass spectrometer and the separation gauge. The sample preparation chamber, the first-stage sample feeding chamber, the second-stage sample feeding chamber and the calibration chamber are connected with the air pumping system. According to the invention, actually required mixed gases can be configured according to customer requirements. In addition, it is ensured that gases do not change in the calibration process.

The invention discloses a noise equivalent temperature difference calibration method for a temperature measurement thermal infrared imager, and the method comprises the following steps: 1, enabling the emissivity and other parameters of a to-be-measured thermal infrared imager to be consistent with those of a target blackbody radiation source; 2, respectively selecting two temperature points for calculation, and taking the two temperature points as calculation areas; and 3, setting a double-blackbody radiation source, enabling the target radiation blackbody to be higher than the background temperature and stabilized at the differential temperature of the target radiation blackbody and the background radiation blackbody, and calculating the noise equivalent temperature difference on the selected calculation area according to a certain formula. The double-blackbody radiation source is adopted to calibrate the noise equivalent temperature difference of the temperature measurement thermalinfrared imager, field calibration is facilitated, disassembly and reassembly are convenient and rapid, the overall measurement system is simple, and the field calibration requirement of the temperature measurement thermal infrared imager can be met.

The invention relates to a standard template for nanometer measurement instrument calibration and a preparation method thereof. A layer of Al2O3 thin film is deposited on the surface of a substrate byusing an atomic layer deposition process; photoresist is spin-coated on the surface of the Al2O3 thin film and is dried; exposure operation is carried out on the photoresist in an electron beam direct writing mode, wherein an exposure pattern is a pattern of a calibration structure in an x direction and a y direction of the standard template for nano measurement instrument calibration; developingis carried out in a developing solution and then drying is performed; the residual photoresist on the developing position is removed; the Al2O3 thin film which is not covered by the photoresist is removed by adopting a corrosion method; the residual photoresist on the surface is removed; and drying is performed to obtain the standard template for nanometer measurement instrument calibration. By virtue of the standard template, nano-scale control of the three-dimensional precision of the calibration structure can be realized, and the problem in one-time calibration of an atomic force microscope in x, y and z axes can be solved, and the calibration efficiency is improved.

The invention provides a calibration device for a road section flaw detection and structural layer thickness ground penetrating radar. The device is technically characterized in that a bracket is horizontally placed on the ground through ground legs; a bottom pad is placed on the ground at the middle of the bracket; a metal plate is horizontally placed on the bottom pad; a thickness sample is horizontally placed on the metal plate in an overlapped manner, and a height adjusting knob and a height adjusting frame are fixed on a cross beam of the bracket; an antenna suspension beam is fixed on alower cross beam of the height adjusting frame, and the ground penetrating radar antenna is fixed on the antenna suspension beam, wherein the height is adjusted according to different sizes of the ground penetrating radar antenna and the thickness sample group. The device has the advantages that the device is simple in structure, stable in chemical and physical properties, good in uniformity, stable in dielectric constant, convenient to store and not prone to deformation of the thickness sample set, and can cover all thicknesses required by ground penetrating radar calibration. The height adjusting function meets the calibration requirements of different types of ground penetrating radars, the operation is simple and convenient, and a reliable basis is provided for data evaluation of the ground penetrating radars.

The invention provides a method and a device for calibration of photoelectric bridge deflection meters. The device comprises a measurement mainframe, a moving module and an automatic leveling module. The measurement mainframe is used for calculating calibration data of a to-be-calibrated deflection meter on the basis of set reference data and measurement data of the to-be-calibrated deflection meter. The moving module is connected with the measurement mainframe and vertically moving relative to the horizontal plane to enable deflection measurement of the to-be-calibrated deflection meter on the basis of control signals obtained from the reference data processed by the measurement mainframe. The moving module is arranged on the automatic leveling module which is connected with the measurement mainframe, and the automatic leveling module is controlled by the measurement mainframe to realize automatic leveling. By the method and the device for calibration of the photoelectric bridge deflection meters, calibration of static deflection and dynamic deflection of the photoelectric bridge deflection meters can be realized.

The invention discloses a calibration method of the capacity of a pipettor. According to the method, the capacity of the pipettor is calibrated by using ultraviolet visible spectrophotometry, the capacity of 1[mu] L or greater is calibrated in a single dyeing mode, and the capacity of the pipettor at a point to be calibrated is calculated according to a standard working curve and the absorbancy ofa solution at a specific wavelength; and in a double-dyeing mode, the capacity of 1[mu] L or less is calibrated, a micropore shade guide is adopted for measurement, the volume of a diluent in the double-dye mode is obtained by measuring the absorbancy of the solution at 730nm through conversion, the uncertainty introduced in the addition process of the diluent is eliminated, and the measurement accuracy is improved. Compared with the prior art, on one hand, the calibration method overcomes the influence of natural evaporation of a liquid in a measuring method, and requirements on environmentconditions are reduced; and on the other hand, in the single dyeing mode and the double-dyeing mode, accurate calibration of capacities of 1[mu] L or greater and 1[mu] L or lower can be simultaneouslyachieved, and calibration requirements of different accuracy grades can be met.

The invention discloses a phased-array antenna calibration system and calibration method. The system comprises an antenna array which comprises at least two measurement antennas and an isolation material and is used for the near-field calibration measurement of a to-be-calibrated phased-array antenna in a preset distance; an anechoic chamber, wherein the antenna array and the phased-array antennaare all arranged in the anechoic chamber; an instrument which is connected with the antenna array and the phased-array antenna so as to be matched with the antenna array to calibrate and measure the phased-array antenna. According to the calibration system provided by the embodiment of the invention, the phased-array antenna is calibrated in an electric switching mode, calibration efficiency is effectively improved, calibration precision is improved, calibration requirement is effectively met, and the calibration system is simple and easy to implement.

The invention provides a medical electric leakage analyzer calibration device and system, and belongs to the technical field of calibration equipment. The device comprises a control module, a small signal generation module connected with the control module, and an amplification output module connected with the small signal generation module. The amplification output module is used for being connected with a medical electric leakage analyzer to be calibrated. The control module is used for generating a calibration instruction to the small signal generation module. The small signal generation module is used for generating a high-frequency sine wave signal corresponding to the calibration instruction and having the bandwidth being in a preset frequency range according to the calibration instruction. The amplification output module is used for amplifying the high-frequency sine wave signal at a preset multiple to obtain a calibration signal. When the medical electric leakage analyzer to becalibrated is calibrated through the calibration signal, the bandwidth of the calibration signal is within 10 Hz to 10 MHz and is also amplified by a preset number, so that the calibration signal generated by the calibration device of the medical electric leakage analyzer meets the calibration requirements of the medical electric leakage analyzer to be calibrated no matter the bandwidth and the power.

The invention discloses a calibration system and a calibration method suitable for an on-missile inertial assembly of a small-sized guided missile. The calibration system comprises a joint robot, a clamp, a test platform, a remote control cabinet and the like, wherein the joint robot can clamp and fix a tested missile through the special clamp, and the remote control cabinet controls the joint robot to grab the tested missile to reach different positions and postures; at the same time, the joint robot is provided with an angle reference, and test and calibration of the on-missile inertial assembly are realized through comparison between the angle reference and output of the inertial assembly. The calibration system of the invention has the beneficial effects that: test and calibration of the on-missile inertial assembly can be completed under the whole missile condition, a stable, reliable, safe and convenient platform for test and calibration of the on-missile inertial assembly is provided, and the problem that a calibration process of the on-missile inertial assembly is complex at present is solved.

The invention provides a multi-point liquid level sensor calibration device and calibration method. The multi-point liquid level sensor calibration device comprises a rack 1, a support 2, a linear module 3, a measuring cylinder 4 and a base 5. The rack 1 and the measuring cylinder 4 are arranged on the base 5, and the measuring cylinder 4 is internally used for accommodating a medium required by calibration; the linear module 3 is connected to the rack 1 and is in driving connection with the support 2; and the support 2 is provided with a fixing structure used for fixing a sensor to be calibrated. The calibration device provided by the invention meets the calibration requirements of the liquid level sensors with different length specifications, and improves the reliability of the sensors.

The invention discloses a rectangular waveguide evanescent mode based electromagnetic field probe spatial resolution calibration device. The device includes a rectangular waveguide connected to a matching load; the rectangular waveguide has a width a, a height b and a length l, wherein a <= 0.4c/f<max>, b < a, l > 8[lambda]c10, the c is the light velocity in vacuums, f<max> is the highest calibration frequency, and [lambda]c10 is the cut-off wavelength of a dominant mode TE10 mode of the rectangular waveguide; the half position on the upper broad wall of the rectangular waveguide is provided with a slit so as to form a calibration area; a probe can be completely stretched into the slit and move in the slit through the configuration of the width w of the slit and the height b of the rectangular waveguide; and the disturbance of the slit on a waveguide internal field structure can be in the allowed range of calibration precision through the configuration of the width w of the slit. The device is flexible and plastic in design and wide in calibration band, and can obtain large electromagnetic field gradients, so that the device is convenient in calibration operation and high in calibration precision.