132results about How to "Realize online calibration" patented technology

A thrust measuring system of thrust engine used in small space comprises storage tank of thrust agent, engine, mechanical body, transducer, driving and controlling circuit. It is featured as setting transducer at external side of one end on working beam and balance weight block on another end; placing said driving and controlling circuit in horizontal trench of front and back support beams; arranging engine on connection piece; connecting one end of thrust agent tube to engine and another end to thrust agent storage tank; forming mechanical body by support frame, master shaft, working beam, thrust component and balance weight.

The invention discloses an online analysis system for monitoring harmful gases in a livestock and poultry farm. The online analysis system comprises a sampling unit, a purifying unit and an analytic unit connected in turn. Steam with a constant pressure is introduced into the sampling unit, is sent into the purifying unit by an injection pump and then is passed into the gas analytic unit. Through multiple times of filtration and dehumidification treatments, the gasses exhausted by a ventilation opening of the livestock and poultry farm can be stably sampled under various working conditions, and the sampled gasses automatically undergo dust removal, dehumidification drying, pressure and flow stabilization, fine filtration, flow measurement and quantitative analysis. Besides, measurement range calibration and zero point calibration are performed on a gas analyzer through a standard gas connected with the analytic unit to realize online calibration of the analysis system. The invention also discloses an online analysis method for monitoring the harmful gasses in the livestock and poultry farm. Through the online analysis system and the online analysis method, hydrogen sulfide, ammonia gas, carbon dioxide, carbon monoxide and methane exhausted by the ventilation opening of the livestock and poultry farm can be accurately and reliably detected and analyzed online.

The invention relates to a robot calibration system, a two-dimensional plane motion calibration method and a three-dimensional space motion calibration method. The system comprises an industrial robotand an upper computer, and further comprises a target, measuring assemblies and a calibration assembly. The target is fixedly installed at the tail end of the industrial robot. The measuring assemblies are arranged on the periphery of the industrial robot, and each measuring assembly comprises a prism assembly and a camera. The prism assemblies are arranged between the target and the cameras, andthe visual axis of each camera and the optical axis of the corresponding prism assembly are kept coaxial. The calibration assembly is arranged in the view field of the measuring assemblies and does not interfere with the industrial robot. The upper computer is connected with the cameras and the prism assemblies. Compared with the prior art, the robot calibration system has the advantages that theupper computer can control the prism assemblies and adjust the visual axes of the cameras matched with the prism assemblies, the real-time dynamic measurement of the center position of the target isachieved, an error response equation of nominal coordinates and measurement coordinates of current geometrical parameters of the robot is constructed, the corresponding current geometrical parametersof the robot in the process that the error is minimum are sought, and the online calibration of the robot can be achieved.

The present invention provides a light-scattering-method-based PM2.5 monitor calibration method and device, and relates to the measuring technology. A light scattering signal generated by an aerosol particle group is converted into an electrical signal; total aerosol particle mass can be obtained according to direct proportion relation of cumulative voltage and cumulative mass of the aerosol particle group; a sample volume of a to-be-tested PM2.5 monitor is used as a standard volume, and standard mass concentration can be obtained according to the ratio of the total aerosol particle mass and the standard volume; an error value of a concentration display value of the to-be-tested PM2.5 monitor and the standard mass concentration is read by comparison, and a test result is judged. The light-scattering-method-based PM2.5 monitor calibration method solves the technical problems of complex calibration process, low calibration efficiency, difficulty in trace to the source of quality benchmark technology of PM2.5 monitors in the prior art. The beneficial effects are as follows: fast measuring speed, high sensitivity and accurate detection. Operation is simple and time saving, detection efficiency is improved, the light-scattering-method-based PM2.5 monitor calibration method is capable of tracing to the source of quality benchmark, can achieve online calibration, and saves testing costs, and the calibration device is reasonable in structure, low in cost, and easy to maintain.

The invention provides an on-line calibration device and method for a leakage detection instrument. The leakage detection instrument (21) comprises a container (19) and a pressure meter (18). The calibration device is mainly composed of a gas supply system I (1), a gas supply system II (14), a needle valve (2), stop valves (3,6,8,10, 13,15 and 17), a pressure stabilizing chamber (5), a positive pressure standard leak (9), a calibration chamber (12), a pressure meter I (4), a pressure meter II (11), an air pumping system I (7) and an air pumping system II (16). The on-line calibration device can carry out calibration on the leakage detection instrument based on the constant volume pressure rise theory, is wide in calibration range and is used for calibrating various leak indication gases.

The invention discloses a cement supply online calibration system of stable soil plant mix equipment, comprising an inclined frequency-conversion spiral feeder, a calibration bin, a detection unit 1, a detection unit 2 and a control system, wherein the detection unit 1 and the detection unit 2 are both connected with the control system. The calibration bin is fixed at the upper part of the inclined frequency-conversion spiral feeder and used for temporarily storing and buffering supplied cement to prevent the cement from directly impacting the inclined frequency-conversion spiral feeder; the detection unit 1 is used for detecting the change value Q1 of cement weight in the calibration bin before and after the calibration; the detection unit 2 is used for detecting the instant cement flow value of a discharging hole of the inclined frequency-conversion spiral feeder; and the control system is used for correspondingly controlling the rotate speed of the inclined frequency-conversion spiral feeder according to calibration coefficient obtained from real-time analysis and processing. The invention has reasonable design, simple and convenient operation and high calibration precision, and can overcome the defect that the cement calibration of prior stable soil plant mix equipment is achieved only by manpower, is difficult to operation and has low calibration precision.

The invention relates to a high-accuracy measurement technical field of current amplitude and phase, in particular to an online mark and check method for the transformation ratio and angle difference of current transformer CT, and a relative system, wherein lg(t) is the sensitive output of the current transformer with linearly mixed lx(t) and lx(t), therefore, Ig(t)=1Ix(t)+a2IS(t), while lx(t) is the object current, ls(t) is the current signal generated on the measurer, a1 and a2 are the sensitive factors of lx(t) and ls(t) on the output signal lg(t) of the current transformer, then the invention uses independent element analysis method to separate signal ls(t) from signal lg(t), to obtainthe evaluated signal ls'(t) of ls(t), and via the mixed factors a1 and a2 to obtain the transformation ratio and angle difference or the like of current transformer in real condition. Via comparing ls'(t) and ls(t), the invention can easily and reliably realize online check of current transformer and check the result of the independent element analysis.

The invention discloses a cell SOC (State Of Charge) on-line calibration method, comprising: determining whether a cell meets calibration conditions in dependence on the charge-discharge state in which a cell is located and executing cell SOC calibration when the cell meets calibration conditions; and simply processing the real-time operation data of the cell, so as to realize SOC calibration. The method can realize rapid and simple on-line calibration on a SOC, cause no damage to the cell, and improve SOC estimation accuracy and precision under a dynamic state.

The invention discloses a liquid metal and high-pressure gas flowing heat exchanging device which comprises a liquid metal loop and a high-pressure gas loop. The invention further discloses a method for exchanging heat by using the heat exchanging device. According to the liquid metal and high-pressure gas flowing heat exchanging device and the liquid metal and high-pressure gas flowing heat exchanging method, a flowing heat exchanging property of a high-temperature liquid lead-bismuth alloy and a flowing heat exchanging property of the high-temperature liquid lead-bismuth alloy with high-pressure helium can be researched, the flowing heat exchanging properties of other high-temperature liquid metals and flowing heat exchanging properties of the other high-temperature liquid metals with a high-pressure gas can be researched, and detailed and reliable data can be provided to a subcritical system which is driven by an accelerator and cooled by adopting a liquid heavy metal and relevant nuclear reactors.

The invention discloses a boron concentration meter for a nuclear power station and a calibration method thereof. A detection device of the boron concentration meter is characterized in that a section of pipe on a drainage water monitoring branch is taken as a sampling pipe which serves as a sharing pipe section of a to-be-measured water monitoring branch and a calibration loop, and on-line communication of the sampling pipe and the calibration loop is realized through switching of tee branch control valves at two ends of the sharing pipe section; chemical titration as a standard, and the calibration for the boron concentration meter is finished ; and the operation is transferred to the monitoring branch after the calibration for real-time monitoring of boron concentration of primary loopwater . A measuring device adopts a linear mathematic model to establish a measurement relation in a piecewise fitting manner, so that the measurement precision is improved; and by means of an established on-line immediate calibration method, measurement drifting is eliminated, and measurement errors are corrected. The device is simple in structure, the measurement method is accurate and reliable, and the operation is easy; and by virtue of the calibration method, the insurmountable technical problem caused by enlargement of measurement errors of the boron concentration meter as time goes by is successfully solved, and accurate continuous on-line monitoring of the boron concentration of the primary loopwater is realized.

The invention discloses a vector constraint-based random characteristic point selection method for landing position detection. The method comprises the steps of 1, performing acquisition and synchronous uploading of a landing region image; and 2, processing the landing region image: 201, processing the landing region image at an initial sampling moment; 202, processing the landing region image at the next sampling moment by Harris corner extraction, Harris corner matching, SIFT characteristic extraction, SIFT characteristic point matching, characteristic point fusion, characteristic point combination generation and optimal characteristic point combination screening; and 203, returning to the step 202 of processing the landing region image at the next sampling moment. The method is simple in step, reasonable in design, convenient to realize, high in practicality and good in using effect; characteristic points for pose estimation can be simply, conveniently and quickly selected from characteristic points extracted from unknown landing region images; and the pose estimation precision can be effectively improved.

The invention discloses a circular erosion test device for closed pipelines. The circular erosion test device comprises a stirring device, a measuring device, a control device, a calibrating device and a pipeline device, wherein a medium is stirred in the stirring device, and then is conveyed to the measuring device for measuring through the pipeline device; the measuring device is connected with the control device; the control device is used for acquiring and adjusting the measurement data obtained by the measuring device; the calibrating device is connected with the measuring device and used for calibrating; the pipeline device comprises a stainless steel pipeline, and a to-be-tested pipeline which is a replaceable pipeline; the control device adopts a center console which comprises a data acquisition module, a temperature control module and a pressure control module. The circular erosion test device has the advantages that various factors are comprehensively considered, the actual working condition can be simulated, and the test results are more accurate.

The invention discloses an on-line wavelength calibration device and a method of a DBR (distributed bragg reflector) tunable laser. The device comprises a coupler, an interferometer, a photoelectric detector, a signal acquisition and processing circuit and a laser driving circuit. A reflection spectrum of the interferometer is of a cosine type; output wavelengths of the DBR tunable laser are set at a pi/2 phase of the reflection spectrum of the interferometer; when an optical signal acquired by the signal acquisition and processing circuit deviates from the pi/2 phase, a newly generated control parameter of the DBR tunable laser is transmitted to the laser driving circuit; and the laser driving circuit changes control current of the DBR tunable laser, so that the output wavelengths of theDBR tunable laser are locked at the pi/2 phase of the reflection spectrum of the interferometer all the time. According to the device and the method, the interferometer is introduced for monitoring and feedback control of the wavelengths of the DBR tunable laser, and a wavelength control error during long-term usage of the DBR tunable laser can be effectively decreased.

The invention discloses a micro-vision calibration system and a micro-vision calibration method based on target motion. Calibration between the micro-vision calibration system and an operating device is achieved by utilizing at least twice relative motion of a target in a clear imaging plane. First, the operating device drives a micro-tube to enter a visual field of the micro-vision calibration system, a coordinate of the operating device is adjusted to enable the micro-vision calibration system to be capable of acquiring a clear image at the tail end of the micro-tube, and an image coordinate and an operating device coordinate at the tail end of the micro-tube are recorded. Then, on the premise that the image at the tail end of the micro-tube is kept to be clear, the operating device drives the micro-tube to perform twice relative motion in the clear imaging plane, and the image coordinate and the operating device coordinate at the tail end of the micro-tube are recorded. An image jacobian matrix is calculated by utilizing a least square method according to changes of the micro-tube image coordinate and the operating device coordinate. The micro-vision hand-eye calibration method based on the target motion is convenient to apply, on-line calibration of the micro-vision calibration system can be achieved, and the adaptability and the availability of micro-operation under the guiding of micro-vision can be remarkably improved.

The invention discloses an on-site absorption spectrum gas analysis system. The system comprises a light transmitting unit, a light receiving unit and a signal analysis unit, wherein the light transmitting unit comprises a light source and a converging lens. The system is characterized in that: one end of the converging lens back to the light source is provided with an arc surface; the arc surface end of the converging lens is provided with a calibration chamber of which one end is provided with an opening and the other end is closed; the opening end is hermetically connected with the converging lens; an A-A section on the middle part of the converging lens is in any geometrical shape; and light emitted by the light source passes through the converging lens and the calibration chamber and enters a medium to be measured. The system has the advantages of real-time on-line calibration, high measuring accuracy and measuring sensitivity, simple and reliable structure, easily realized explosion isolation function, no need of blowing, low sealing requirement and the like, and is convenient to manufacture.

The invention discloses a normal position zero gas back-blowing type CEMS (continuous emission monitoring system) probe on-line calibration method and device, and belongs to fume on-line continuous monitoring and calibrating. According to the device, a probe is not extracted, a probe measuring region is provided with a shield, pressure for providing a system for performing back-blowing is regulated through shielding the probe measuring region, excessive back-blowing is performed on the measuring region, and fume in the measuring region is evacuated; zero air is fully filled in a calibration pond, the zero creep calibration operation is performed on the system, the calibration pond is fully filled with range point standard air, and the range drifting calibration operation is performed; the calibration is finished, the calibration pond is filled with the zero air again; and finally, the shield in the measuring region is withdrawn, the compressed air back-blowing pressure is regulated, and the system is at a normal measuring condition. The normal position zero air back-blowing type CEMS probe on-line calibration method and device provided by the invention can perform completed original light path on-line calibration under the condition that the probe is not extracted in a measuring system, and a measuring light path and a calibration light path are completely consistent.

The invention discloses a temperature measurement device with an online calibration function for an oil-immersed transformation device. The temperature measurement device comprises a composite temperature sensor unit, a pointer display and control unit and an online calibration unit. The composite temperature sensor unit comprises temperature sensing bulb and a temperature measurement element, which are used for measuring the working temperature of the oil-immersed transformation device. The temperature sensing bulb is connected with the pointer display and control unit. The temperature measurement element is connected with the online calibration unit. The pointer display and control unit is used for displaying the working temperature, measured by the temperature sensing bulb, of the oil-immersed transformation device in a pointer manner. The displayed temperature value is a first temperature value. The online calibration unit is used for carrying out online calibration on a second temperature value measured by the temperature measurement element and acquiring calibrated output temperature. The beneficial effects are that online calibration of the temperature measurement device when the oil-immersed transformation device is not in the power outage state is achieved; deviation faults of two meters of the temperature measurement device for the oil-immersed transformation device are eliminated; and the temperature measurement device has great importance in guarantee of safe and stable operation of the oil-immersed transformation device.

The invention relates to a gas spray pipe flow measuring device capable of online calibration, comprising: a pipe segment for passage of gas; a spray pipe mounted in the pipe segment and having a first port and a second port; a differential pressure transmitter measuring a pressure difference between the first port and second port of the spray pipe; the device is characterized in that the pipe segment is provided with a transparent window, projection of the transparent window on a pipe wall covers projection of the second port of the spray pipe on the pipe wall; a laser Doppler flow rate meter is disposed outside the pipe segment, and laser emitted by the Doppler flow rate meter passes through the transparent window and measures flow rate at the second port of the spray pipe. The spray pipe flow measuring device can run reliably and measure accurately, and a calibration method has a clear process and is convenient to operate.

The invention belongs to the technical field of flow measurement, and relates to a permanent magnetic liquid metal vortex street flowmeter and application thereof. The permanent magnetic liquid metal vortex street flowmeter comprises a primary sensor, a secondary meter and a signal cable, wherein the primary sensor comprises a magnetic steel assembly, an electrode, a pipeline and a vortex generating body; the magnetic steel assembly provides a stable magnetic field for generating measuring signals; the pipeline is clamped in the middle of the magnetic steel assembly; the vortex generating body is arranged in the pipeline and used for transforming the three-dimensional pipe flow in the pipeline into a two-dimensional vortex current; the electrode is arranged on the pipeline, and the axial line of the electrode, the axial line of the pipeline and the magnetic line of force of the magnetic field generated by the magnetic steel assembly are mutually perpendicular; and the secondary meter is connected with the electrode through the signal cable and used for calculating the output signals of the electrode by a correlation method. The liquid metal vortex street flowmeter and application thereof provided by the invention are capable of measuring the flow rate of liquid metal by a simple structure at high precision in a wide range, and realizing on-line calibration of the flow rate of the liquid metal.

The invention relates to a Kalman filtering based online calibrating method of a Stewart mechanism. The calibrating method comprises the steps that 1) a pose measuring device is fixed at one side of the Stewart mechanism, and the working space of the pose measuring device covers the motion range of the Stewart mechanism; 2) the pose of the Stewart mechanism is adjusted so that a moving platform of the Stewart mechanism moves in different directions, the pose measuring device measures the pose of the moving platform of the Stewart mechanism, and measured pose data is compared with theoretical pose data to obtain pose error data; 3) the theoretical pose data and the pose error data are substituted into the Kalman filtering algorithm, and error source data is obtained via iteration; 4) the error source data is substituted into the kinematic positive solution of the Stewart mechanism to correct the kinematic positive solution; and 5) the steps 2) to 4) are implemented cycled till the pose error data is converged. According to the invention, operation is simple, the cost is low, and the calibration efficiency is high.

The invention provides an exhaust temperature monitoring device of a supercharged diesel engine for a ship and a monitoring method. The device is composed of a power supply module (1), thermocouple signal conditioning modules (2), a controller module (3), CAN bus modules (4), RS422 bus modules (5) and a temperature compensation signal conditioning module (6). The controller module (3) provides all interfaces, the power supply module (1) provides a stable power supply separated from an external power supply for the whole device, each thermocouple signal conditioning module (2) comprises four measuring channels, each CAN bus module (4) comprises two CAN bus interfaces, each RS422 bus module (5) comprises two RS422 bus interfaces, and the temperature compensation signal conditioning module (6) comprises two PT1000 thermocouple measuring channels. The invention has convenient use and easy extension and can meet the requirement of exhaust temperature monitor of the diesel engine for the ship and the comprehensive monitoring of the diesel engine.