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40 results about "Absolute accuracy" patented technology
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System and method for examining, recording and analyzing dermatological conditions
InactiveUS6993167B1Minimise edge contributionDecrease shiftDiagnostics using lightSurgeryMelanomaHand held
A system for collecting, storing and displaying dermatological images for the purpose of monitoring and diagnosis of skin conditions and skin cancers, including melanoma. A hand-held unit illuminates a section of the patient's skin, and an imaging device generates imaging signals from light derived from a skin section. Pairs of light output ports in the hand-held unit are arranged such that their intensity distributions overlap at their half-intensity levels so that the resulting summation of their intensities has a flat central region. Three image stores are maintained, one for lesion images, one for “nearby skin” images, and one for reference-white images. The “nearby skin” images are used by the system software to automatically determine the skin / lesion border. The reference white images are used to set the dynamic range of the instrument and to compensate for lighting irregularities. Two images of the same lesion taken at different times may be displayed simultaneously so that changes in the lesion may be determined. The calibration system is designed so that image data taken on any of multiple machines built to the same specification will be corrected back to a common reference standard to ensure absolute accuracy in colour rendition.
Owner:POLARTECHNICS
Wavelocker for Improving Laser Wavelength Accuracy in WDM Networks
InactiveUS20110135301A1Easy mappingMaintaining full visibilityMultiplex system selection arrangementsWavelength-division multiplex systemsLasing wavelengthOptoelectronics
The present invention includes novel techniques, apparatus, and systems for optical WDM communications. Various wavelocker apparatus and methods are disclosed that measure the frequency offsets between signal lasers and reference lasers. The measured offsets are used to adjust the signal laser frequencies to meet their target frequencies. The absolute accuracy of the reference laser frequency is improved by measuring the absorption of the reference laser by a gas cell with known fixed absorption lines versus the reference laser frequency. Apparatus and methods are disclosed to cover scenarios in which the reference laser polarization is aligned with the signal lasers, as well as those in which the reference laser polarization is not aligned with the signal lasers. The wavelocker apparatus may or may not be located at the same network site as the signal lasers.
Owner:VELLO SYST +1
Forward error correction for media transmission
ActiveUS20080192738A1Quality improvementError prevention/detection by using return channelTransmission systemsThe InternetForward error correction
A “Media Transmission Optimizer” provides a media transmission optimization framework for lossy or bursty networks such as the Internet. This optimization framework provides a novel form of dynamic Forward Error Correction (FEC) that focuses on the perceived quality of a recovered media signal rather than on the absolute accuracy of the recovered media signal. In general, the Media Transmission Optimizer provides an encoder that optimizes the transmission of redundant frames of electronic media information encoded at different bit rates, and provides optimized playback quality by providing a decoder that automatically selects an optimal path through one or more available representations of each frame as a function of overall rate / distortion criteria.
Owner:MICROSOFT TECH LICENSING LLC
Aircraft engine mounting vehicle
InactiveCN102009340AHigh loading and unloading positioning accuracyHigh degree of automationAircraft assemblyMetal working apparatusAviationControl system
The invention discloses an aircraft engine mounting vehicle. The aircraft engine mounting vehicle comprises a lifting bracket (1), a shear type lifting mechanism (2), a back-and-forth moving frame (3), a left-right moving frame (4), a rotating disk mechanism (5), an electrohydraulic servo control system (6) and a vehicle body (7), wherein the lifting bracket (1) is provided with a longitudinal linear guide rail (15); the back-and-forth moving frame (3) is provided with a transverse linear guide rail (16) and a longitudinal slide block (17); the left-right moving frame (4) is provided with a transverse slide block (18); and the electrohydraulic servo control system (6) comprises a control unit (20) and an executing unit (21). In the aircraft engine mounting vehicle, a closed-loop servo control system consisting of the linear guide rail, a high-accuracy sensor, a high-response spaceflight servo valve, a precise servo oil cylinder and a programmable logic controller (PLC) is adopted, so 0.1mm absolute accuracy fine adjustment can be realized; and the aircraft engine mounting vehicle has the advantages of improving the aircraft engine assembling and disassembling efficiency and reducing the assembling and disassembling cost, along with high assembling, disassembling and positioning accuracy of an engine, and high automation degree and maneuverability.
Owner:成都立航科技股份有限公司
Forward error correction for media transmission
ActiveUS8553757B2Quality improvementError prevention/detection by using return channelFrequency-division multiplex detailsThe InternetAbsolute accuracy
Owner:MICROSOFT TECH LICENSING LLC
Ppm quantification of iodate using paper device
InactiveUS20150160245A1Superior chemical parameterEasy to analyzeImage enhancementImage analysisIodateSoftware
A highly sensitive method that utilizes a Paper Analytical Device (PAD) which measures part per million (ppm) levels of iodate iodometric titration is provided. The PAD quantifies concentrations of 0.6-15 parts per million (ppm) of iodine. The PAD has at least 12 reaction zones that contain dried reagents thereon and at least one electronically readable information zone. Salt and water are mixed and drops are placed onto 12 reaction zones that contain the loaded dry reagents. The PAD is shaken and the reaction zones turn blue if a preset iodate concentration has been exceeded. Test results are analyzed by comparing the PAD or an image of the PAD with standards, either by eye or with image analysis software to measure the color intensities which are compared to a calibration curve to quantify the iodate levels. The image analysis quantifies iodine with an average absolute accuracy and precision of 0.9 ppm over a range of 0.6-15 ppm.
Owner:UNIV OF NOTRE DAME DU LAC
Industrial robot absolute accuracy calibrating method based on IEKF
ActiveCN105773622AThe method is general and strongLess valid dataProgramme-controlled manipulatorAlgorithmKinematic calibration
The invention discloses an industrial robot absolute accuracy calibrating method based on IEKF. The method is characterized by comprising the following steps: a parameter error model is built, and a laser tracking system is used for sampling data in a robot terminal position in a Cartesian space to obtain position errors under different coordinates; geometric parameter nominal values are used for building a kinetic model of a robot, and parameter vectors to be identified are built by combining with a vector product method to obtain a parameter Jacobian matrix; and parameter errors in the parameter error model are identified by using an IEKF algorithm, and parameter errors of the robot are obtained through iterative computation. Finally, the parameter errors are used for correcting the geometric parameter nominal values to finish kinematic calibration of the industrial robot so as to realize absolute accuracy calibration of the robot. The robot absolute accuracy calibrating method based on IEKF, provided by the invention, is suitable for any serial joint robot and any plane joint robot.
Owner:湖州菱创科技有限公司
Abbe error correction system and method
The present invention preferably employs non-contact, small-displacement, capacitive sensors (124, 128, 130, 131, 132) to determine Abbe errors due to the pitch (20), yaw (22), or roll (18) of a near linear mechanical stage (56, 58) that are not indicated by an on-axis position indicator, such as a linear scale encoder or laser interferometer. The system is calibrated against a precise reference standard so the corrections depend only on sensing small changes in the sensor readings and not on absolute accuracy of the sensor readings. Although the present invention is preferred for use in split-axis positioning systems (50) with inertially separated stages (56, 58), the invention can be employed in typical split-axis or stacked stage systems to reduce their manufacturing costs.
Owner:ELECTRO SCI IND INC
Obtaining and keeping synchronous method for base station
InactiveCN101051888AAccurate detectionNo switching jitterRadio/inductive link selection arrangementsRadio transmission for post communicationAbsolute accuracyBase station
The synchronous clock preprocessing and detecting unit detects rising edge of initial synchronization signal (SS), and filters out burrs. When rising edge is detected, local crystal oscillation clock starts counting, and till next rising edge of next SS so as to obtain a value of counter. Based on the value of counter, synchronization control unit carries out analysis, judgment and process. The synchronous clock output unit outputs SS. Being applicable to sync CDMA system; the invention can detect SS precisely. Precision of SS is not affected by absolute accuracy of crystal oscillation. In procedure of losing and recovering synchronization, switching procedure is not needed so that switching dithering will not produce.
Owner:BEIJING XINWEI TELECOM TECH
Laser interferometer displacement measuring system, exposure apparatus, and electron beam lithography apparatus
InactiveUS6839142B2Improve accuracyCorrection errorElectric discharge tubesUsing optical meansLaser lightAbsolute accuracy
An absolute accuracy in the range from ±2 nm to ±1 nm for a displacement measurement value is provided by a laser interferometer displacement measuring system. A fluctuating error component that appears corresponding to the wave cycle of laser light is detected and subtracted from the measurement value while a stage is moving, thereby providing a high accuracy.
Owner:HITACHI LTD
Temperature transmission device and method based on program-controlled dual constant current power supply
ActiveCN107941363AAccurate and fast measurementImprove timelinessThermometers using electric/magnetic elementsUsing electrical meansElectrical resistance and conductancePower flow
The invention relates to the field of temperature measurement systems, and provides a temperature transmission device based on a program-controlled dual constant current power supply for the technicalproblems of the existing temperature transmission device that the circuit output is not 0 and the absolute accuracy cannot reach + / -0.1 DEG C when the measured temperature is 0 DEG C. The temperaturetransmission device comprises: a thermal resistor, the resistance of the thermal resistor increasing as the temperature rises; a reference resistor, having the same resistance as the thermal resistorat 0 DEG C; two constant current sources, generating the same current, which passes through the thermal resistor and the reference resistor respectively and then is converged and grounded; a differential amplifier, two input ports of the differential amplifier being respectively connected with the current input ends of the thermal resistor and the reference resistor; an A / D converter, connected with the output port of the differential amplifier; and a microprocessor, connected with the A / D converter.
Owner:CHONGQING TECH & BUSINESS UNIV
Cooling and setting device and method for producing stone paper wallpaper base material
InactiveCN104228048AGuaranteed absolute precisionOvercome the disadvantages of wide and narrow fluctuationsClosed chamberAbsolute accuracy
The invention discloses a cooling and setting device for producing stone paper wallpaper base material. The cooling and setting device consists of a vacuum setting device and two cooling devices, wherein the two cooling devices are two closed annular water or oil jackets; the vacuum setting device is an annular closed chamber; the two closed annular water or oil jackets are respectively connected with two ends of the annular closed chamber to form an overall structure; the annular water or oil jackets are provided with multiple water / oil inlets or water / oil outlets which are uniformly distributed; a joint connected with a vacuum machine is formed in the annular closed chamber; and small holes or linear grooves which are regularly distributed are formed in an inner side wall of the annular closed chamber and are communicated with the annular closed chamber. According to the device, high-temperature parisons extruded from a film blowing machine head have fixed geometrical shapes and sizes, and the stone paper wallpaper base material which accords with related size and quality standard is obtained. The defect that the base material is large in width fluctuation during air cooling of a traditional blowing process is overcome, the absolute accuracy of the size of the stone paper wallpaper base material is guaranteed, the smoothness is greatly improved, and the quality and yield of the product are improved.
Owner:宋旭
Cluster-based fault critical clearing time parallel computing method
InactiveCN101751518AQuick calculationAvoid wastingSpecial data processing applicationsTransient stateRelative precision
A cluster-based fault critical clearing time parallel computing method distributes computing cores according to search interval lengths of faults and ensures the faults with great search intervals to receive more cores. If the tap position split step size of the fault is less than the computing accuracy, the number of cores required by the fault is determined according to the computing accuracy demand. When the absolute accuracy is adopted, if the tap position split step size meets the convergence accuracy, longer observation time is adopted to directly obtain the transient state security CCT and dynamic security CCT through once iteration; else, shorter observation time is adopted to obtain transient security CCT and set the transient security CCT as the upper limit, and then the longer observation time is utilized to obtain the dynamic security CCT. When the relative accuracy is adopted, the transient security CCT is firstly obtained and the dynamic security CCT is subsequently obtained. When the security stability indexes of various power systems are taken into consideration, the minimum one of the angle stability CCT, the voltage security CCT, frequency security CCT and dynamic security CCT is obtained.
Owner:STATE GRID JIANGXI ELECTRIC POWER CO +1
Semiconductor integrated circuit
InactiveCN101663746AImprove absolute accuracyImprove size errorPulse automatic controlSemiconductor/solid-state device detailsCapacitanceRelative precision
A semiconductor integrated circuit is characterized in that it comprises analog macros each having a comb capacitor (10), each comb capacitor (10) is composed of comb-shaped electrodes (11, 12), the comb tooth portions (13) of the electrode (11) and the comb tooth portions (14) of the electrode (12) are so interdigitized that the comb tooth portions (13) and the comb tooth portions (14) are alternated and parallel to one another, and the tooth portion intervals (S) are varied according to the absolute accuracy indicating the difference between the actual capacitance and the ideal capacitance or the relative accuracy indicating the differencebetween the capacitances of the adjacent comb capacitors. A high-accuracy analog macro comprising a comb capacitor whose high capacitance accuracy is ensured and a semiconductor integrated circuit comprising highly-integrated analog macros are provided.
Owner:PANASONIC CORP
Measuring method for thermostability of residual austenite in steel
InactiveCN101504389AAccurate Quantitative Calculation ResultsSave materialMaterial magnetic variablesWire cuttingQuenching
The invention discloses a method for measuring the thermal stability of remained austenite in quenching state steel. The measuring method comprises the following steps of quenching; sampling by wire cutting; making a high-temperature magnetic test(300K to 1,273K); making a low-temperature magnetic test (10K to 300K); and making a test on the thermal stability of the remained austenite by calculation. One or two samples are needed in the measuring process, and as for the size of the samples, the diameter is not more than 2mm, and the length is between 2 and 4mm; and the applied magnetic field strength is (1-3)*0.79*10 A / M. The method can measure the smallest magnetic moment which is 5*10-7emu, has the typical absolute accuracy better than 2 percent and the repeatability better than 1 percent. The method can be used for measuring the quantitative change conditions of the remained austenite when the quenching state samples (including the constant temperature quenching state) undergo high-temperature or low-temperature treatment, evaluating the thermal stability of the remained austenite, and providing basis of reasonably working out a tempering process and a cold treatment process of steel products.
Owner:HEBEI NORMAL UNIV
Moon control network establishment method
ActiveCN102735225AFix scale changeSolve the problem of absolute orientationMeasuring points markingRegular gridAbsolute orientation
The invention discloses a moon control network establishment method, comprising the steps of: step 1, obtaining image data of the lunar surface and corresponding ephemeris data and attitude data; step 2, extracting corresponding image points from image data from different viewing angles of a same orbit and image data of adjacent orbits by using an automatic image matching technology; step 3, by employing the data and the corresponding image points, performing adjustment processing for a survey area to form the ground stereo model of the whole survey area; step 4, performing adjustment processing for the whole moon after the adjustment processing is performed for survey areas; step 5, laying control points on the whole moon according to an established regular grid, then, calculating the selenographic coordinates of the control points according to parameters of the adjustment of the survey areas and the adjustment of the whole moon. The establishment method for the moon control network focuses on specific requirements for 1: 2,500,000 or larger scale lunar mapping, solving the problems of scale change and absolute orientation of the control network and improving the absolute accuracy of the control network.
Owner:NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
Static balance device of vanes on rotating machinery
InactiveCN101788367AImprove performanceImprove absolute accuracyStatic/dynamic balance measurementMechanical engineering technologyThrust bearing
A static balance device of vanes on rotating machinery belongs to the technical field of mechanical engineering and comprises a base, a support column, a fixed support plate, a thrust bearing, a mandrel, a clip and strain gauges, wherein the support column is fixedly arranged on the base; the fixed support plate is fixedly arranged at the upper end of the support column; the strain gauges are arranged at the side at the lower end of the support column; the thrust bearing is arranged in the fixed support plate; and the mandrel is connected with the clip and the thrust bearing respectively. Relative to measurement, the device can accurately measure the static moment difference between the two large-mass vanes to be measured of the large rotating machinery and the center and can carry out balancing while measuring, thus overcoming the defect the traditional moment instruments of the vanes to be measured have lower absolute accuracy when measuring large-mass objects, can only measure the absolute but can not carry out balancing while measuring. The device has reliable performance and greatly improves the measuring accuracy.
Owner:SHANGHAI JIAO TONG UNIV
Feed automatic overturning mechanism of remote controller detection equipment
PendingCN110540038AIncrease the number of testsSave the beatConveyor partsTotal factory controlAbsolute accuracyEngineering
The invention discloses a feed automatic overturning mechanism of remote controller detection equipment. The feed automatic overturning mechanism comprises a support installed on a bottom plate, and arotary shaft is rotationally connected to the support. A first station capable of bearing a workpiece is arranged on one side of the rotary shaft. A second station used for bearing the workpiece is further fixedly connected to the rotary shaft. A driving mechanism driving the rotary shaft to rotate is connected to the rotary shaft. The driving mechanism drives the second station on the rotary shaft to rotate to be above the first station. The workpiece on the first station is picked up and transferred onto the second station and is then overturned. A vacuum sucker is used, locating guiding isadded, thus a remote controller can be sucked stably during equipment overturning, absolute accuracy of locating is ensured while overturning is conducted, stable reliability of the equipment is relatively enhanced, and reliability and precision of the feed automatic overturning mechanism can be ensured through the whole structural design.
Owner:ZHUHAI GREE INTELLIGENT EQUIP CO LTD +1
Apparatus and method for a digital to analog converter architecture
InactiveUS6710731B1Matching accuracy necessaryImproves integral non-linearityElectric signal transmission systemsAnalogue-digital convertersAudio power amplifierLow voltage
Digital-to-analog converter architecture guarantees monotonicity and partial compensation for integral non-linearity. Two stages are separated by a unity-gain operational amplifier, wherein the first stage is a 1-bit resistor string-converter, having one end at reference high voltage, and the other end at reference low voltage, and the second stage is a multi-bit resistor string converter. The architecture relieves matching accuracy necessary for 1-bit front end. Resistor mismatch is compensated by varying buffer amplifier offset-voltage, and ensuring amplifier output is halfway between reference voltages; this improves integral non-linearity, or absolute accuracy, by the amount of mismatch present in the resistor string. Buffer amplifier at output of second stage of DAC controls INL error by varying offset voltage.
Owner:QUALCOMM INC
Mechanical structure of novel high-speed rail track measuring instrument
InactiveCN104652193ARealize automatic collectionGuaranteed accuracyMeasuring apparatusMeasuring instrumentControl system
The invention relates to a mechanical structure of a novel high-speed rail track measuring instrument. The mechanical structure mainly comprises a transverse beam, a longitudinal beam, a high-low optical fiber gyroscope mechanism, a displacement sensor, a tilt angle sensor mechanism, a connecting block, a supporting frame, a display screen, a controller, a connecting wire, travelling wheels, handles, a battery case, an encoder and a track-direction optical fiber gyroscope mechanism. The whole mechanism comprises the transverse beam, the longitudinal beam, the controller and other measuring instruments, wherein the transverse beam and the longitudinal beam are fixedly connected, the transverse beam is arranged in the middle of the longitudinal beam, the battery case and a display and control system are installed on the transverse beam, and a plurality of sensors are fixedly connected to the transverse beam and the longitudinal beam, and used for collecting signals. The mechanical structure of the novel high-speed rail track measuring instrument has the advantages that the structure is simple, functions of collection, processing and display are integrated, absolute accuracy can be effectively guaranteed, operation is convenient, and working efficiency is high.
Owner:XIAN DAYU PHOTOELECTRIC TECH
Temperature transmitter and method based on program-controlled double constant current power supply
ActiveCN107941363BAccurate and fast measurementImprove timelinessThermometers using electric/magnetic elementsUsing electrical meansElectrical resistance and conductancePower flow
Owner:CHONGQING TECH & BUSINESS UNIV
Clock synchronization method of helicopter avionics system test network
ActiveCN107592177ASatisfy cycleMeet the characteristicsTime-division multiplexOperational systemAbsolute accuracy
The invention belongs to the avionics system test technology, and relates to a clock synchronization method of helicopter avionics system test network. The clock synchronization method of helicopter avionics system test network includes the steps: 1) distributing clock synchronization reference information; 2) receiving the clock synchronization reference information by a computer, operating a real time operation system, of the local network; 3) comparing the time difference between the computer and the clock synchronization reference information, and if the time difference is less than the absolute error minimum accuracy time length, counting the clock updating cycle at the moment into a set of clock updating cycles satisfying the absolute accuracy requirement, and if not, omitting the clock updating cycle; 4) if all the clock updating cycles are travesed, entering the step 5, and if not, changing the clock updating cycle and returning to the step 1; and 5) successively taking the clock updating cycles satisfying the absolute accuracy requirement as the updating cycle of the clock synchronization equipment, and sending the clock synchronization reference information to each computer until the debugging relative error in the clock updating cycle is less than the relative error minimum accuracy time length.
Owner:JIANGXI CHANGHE AVIATION IND
A Digital Elevation Model-Assisted Block Adjustment Method for Satellite Imagery
ActiveCN103823981BExpand the scope of actionReduce the number of control pointsPicture interpretationSpecial data processing applicationsArea networkAbsolute accuracy
The invention provides a DEM (Digital Elevation Model)-assisted satellite image block adjustment method. The DEM-assisted satellite image block adjustment method is characterized in that existing DEM data are combined, elevation control is provided when block adjustment is carried out by using an RFM (Rational Function Model) by a satellite image, and thus the dependence of the satellite image on ground control points which are densely distributed when the block adjustment is carried out can be greatly reduced. According to the DEM-assisted satellite image block adjustment method disclosed by the invention, compared with a non-elevation-control traditional block adjustment, when the block adjustment is carried out on a weak-intersection high-resolution downward-looking (panchromatic and multi-spectral) satellite image, and the increasing of the result accuracy is particularly obvious; extremely-high edge matching accuracy and relatively-uniform absolute accuracy can be obtained by the satellite image in a larger regional network just by using a few object space plane elevation control points. The DEM-assisted satellite image block adjustment method disclosed by the invention is very suitable for a satellite image user by whom high-accuracy object space control points are difficult to obtain to a large extent.
Owner:WUHAN UNIV
High-precision thermocouple input module and measurement method
ActiveCN103542954AGuaranteed absolute precisionMeeting the real needs of industrial control processesThermometers using electric/magnetic elementsUsing electrical meansRelative precisionElectronic switch
The invention relates to a high-precision thermocouple input module comprising an isolator, an amplifier, an analog-digital conversion unit, a controller, a digital-analog converting unit and an electronic switch. The isolator is connected with a thermocouple, the output end of the amplifier is connected with the analog-digital conversion unit, and the output end of the analog-digital conversion unit is connected to the controller. The module is characterized in that the grounding end of the isolator is grounded and outputs a grounding joint outwards; the voltage output end of the isolator outputs two joints outwards; the controller outputs feedback signals to the digital-analog converting unit according to signals acquired from the analog-digital conversion unit; and the output end of the digital-analog converting unit outputs an input joint outwards. Another technical scheme of the invention provides a high-precision thermocouple input measuring method adopting the thermocouple input module. The module has the advantages that the entire absolute accuracy of thermocouple signals is guaranteed to range from 0.1 to 0.2 DEG C, the absolute precision can achieve 0.005 to 0.01%, and actual requirements of the industrial control process can be met.
Owner:SHANGHAI POWER EQUIP RES INST
An Iekf-based Absolute Precision Calibration Method for Industrial Robots
ActiveCN105773622BThe method is general and strongLess valid dataProgramme-controlled manipulatorAlgorithmKinematic calibration
The invention discloses an industrial robot absolute accuracy calibrating method based on IEKF. The method is characterized by comprising the following steps: a parameter error model is built, and a laser tracking system is used for sampling data in a robot terminal position in a Cartesian space to obtain position errors under different coordinates; geometric parameter nominal values are used for building a kinetic model of a robot, and parameter vectors to be identified are built by combining with a vector product method to obtain a parameter Jacobian matrix; and parameter errors in the parameter error model are identified by using an IEKF algorithm, and parameter errors of the robot are obtained through iterative computation. Finally, the parameter errors are used for correcting the geometric parameter nominal values to finish kinematic calibration of the industrial robot so as to realize absolute accuracy calibration of the robot. The robot absolute accuracy calibrating method based on IEKF, provided by the invention, is suitable for any serial joint robot and any plane joint robot.
Owner:湖州菱创科技有限公司
Abbe error correction system and method
The present invention preferably employs non-contact, small-displacement, capacitive sensors (124, 128, 130, 131, 132) to determine Abbe errors due to the pitch (20), yaw (22), or roll (18) of a near linear mechanical stage (56, 58) that are not indicated by an on-axis position indicator, such as a linear scale encoder or laser interferometer. The system is calibrated against a precise reference standard so the corrections depend only on sensing small changes in the sensor readings and not on absolute accuracy of the sensor readings. Although the present invention is preferred for use in split-axis positioning systems (50) with inertially separated stages (56, 58), the invention can be employed in typical split-axis or stacked stage systems to reduce their manufacturing costs.
Owner:ELECTRO SCI IND INC
Measuring method for thermostability of residual austenite in steel
InactiveCN101504389BAccurate Quantitative Calculation ResultsSave materialMaterial magnetic variablesWire cuttingAustenite
The invention discloses a method for measuring the thermal stability of remained austenite in quenching state steel. The measuring method comprises the following steps of quenching; sampling by wire cutting; making a high-temperature magnetic test(300K to 1,273K); making a low-temperature magnetic test (10K to 300K); and making a test on the thermal stability of the remained austenite by calculation. One or two samples are needed in the measuring process, and as for the size of the samples, the diameter is not more than 2mm, and the length is between 2 and 4mm; and the applied magnetic field strength is (1-3)*0.79*10<6> A / m. The method can measure the smallest magnetic moment which is 5*10-7emu, has the typical absolute accuracy better than 2 percent and the repeatability better than 1 percent. The method can be used for measuring the quantitative change conditions of the remained austenite when the quenching state samples (including the constant temperature quenching state) undergo high-temperature or low-temperature treatment, evaluating the thermal stability of the remained austenite, and providing basis of reasonably working out a tempering process and a cold treatment processof steel products.
Owner:HEBEI NORMAL UNIV
Printing system and printing method
InactiveCN104077088AGuaranteed real-timeAbsolute Accuracy GuaranteedDigital output to print unitsRs 232 interfaceAbsolute accuracy
The invention discloses a printing system. The printing system comprises a printer, a controller which is connected with the printer through an RS232 interface, and a touch screen which is connected with the controller through the RS422 interface. A printing method is further disclosed. The method comprises the following steps: transmitting a printing request command to the printer by using an M8402 command in a Mitsubishi FX-series PLC (Programmable Logical Controller), wherein M8401 is taken as a mutex; if M8401 is OFF, transmitting data through M8402. By adopting the printing system, the instantaneity of data and the absolute accuracy of data can be ensured.
Owner:张家港华菱医疗设备股份公司
An aspirating smoke detection device
ActiveCN104200605BReduce volumeReduce noiseFire alarmsParticle suspension analysisEngineeringAbsolute accuracy
Owner:霍尼韦尔自动化控制(中国)有限公司
Absolute precision detection method and device of robot and robot
PendingCN114474045AEasy to operateAbsolute Accuracy VerificationProgramme-controlled manipulatorControl engineeringAbsolute accuracy
The invention provides an absolute precision detection method and device of a robot and the robot. The absolute precision detection method comprises the steps that the size numerical value of a first part assembled on the robot is acquired; establishing a coordinate system by taking the tail end of the first part as an original point according to the size value; controlling the tail end of the first part to be connected with the tail end of a second part; and controlling the robot to rotate around the coordinate axis direction of the coordinate system to obtain a detection result. Detection is carried out by arranging the first part and the second part, assembly is simple and fast, special performance testing equipment does not need to be configured, cost is low, the testing method is simple to operate and easy to apply, absolute precision of the industrial robot can be effectively verified, only the robot needs to be controlled to rotate along a coordinate axis, precision testing time is greatly shortened, and testing efficiency is improved. And the detection time is short, the detection efficiency is improved, and the method is suitable for precision detection of factory large-scale production.
Owner:上海新时达机器人有限公司
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