195 results about "Field calibration" patented technology

The invention relates to the technical field of program control systems, in particular to a pentahedron machining center precision calibration method and system based on multi-sensor fusion, and the method comprises the steps: a sensor system construction and calibration module is used for field calibration, drift correction and redundancy deployment to ensure data precision, and achieves the whole-course traceability of a calibration process through a block chain technology; the multi-source data preprocessing and fusion module is used for time-space synchronization of heterogeneous data and dynamic fusion of multi-source information; the intelligent modeling and state prediction module is used for performing real-time and multi-task prediction on key states such as tool wear and thermal deformation; based on the prediction result, the adaptive compensation and path optimization module is used for dynamically optimizing the tool path; meanwhile, through an online learning mechanism, the calibration model is continuously updated by utilizing a processing result; the distributed cooperative control module executes data processing and calibration algorithms locally and makes a cooperative decision with a numerical control system, and low-delay and intelligent response to machining abnormity is achieved.

The invention discloses a tunnel convergence deformation monitoring method, and particularly relates to the technical field of tunnel monitoring, through integrating equipment such as a thermal infrared imager, a visible light camera, a distributed optical fiber sensor and a laser radar, a self-adaptive inspection system is constructed, and high-precision appearance and temperature monitoring is realized by adopting an improved ORB algorithm and a temperature field calibration technology. Performing multi-source data fusion through space-time registration and wavelet packet decomposition in combination with optical fiber strain data; and predicting a deformation trend based on an LSTM neural network, and establishing a three-level early warning mechanism. According to the tunnel convergence deformation monitoring method disclosed by the invention, the automation and intelligence level of tunnel structure safety monitoring is remarkably improved, 'perception-analysis-decision 'closed-loop management of the tunnel health state is realized, compared with a traditional method, the efficiency is remarkably improved, meanwhile, the maintenance cost can be greatly reduced, and the tunnel operation safety and economy are remarkably improved.

The invention discloses a method for automatically detecting the combustion performance of a flooring material based on a bimodal space-time network. The method comprises the following steps: S1, synchronously acquiring and calibrating bimodal data; wherein the bimodal data comprises data acquired by a visible light camera and data acquired by a thermal infrared imager; s2, performing visible light channel flame segmentation based on the data acquired by the visible light camera in the step S1; s3, performing infrared channel temperature field calibration and carbonization analysis on the basis of data acquired by the thermal infrared imager in the step S1; s4, performing spatio-temporal feature fusion on the flame mask obtained in the step S2 and the temperature field data in the step S3; and S5, performing three-dimensional evaluation according to the dynamic prediction result generated in the step S4, and finally evaluating the combustion performance of the flooring material. According to the method, automatic detection of the combustion performance of the flooring material can be realized through the steps S1 to S5, and the problem of large manual observation error in a flooring material combustion test can be solved.

Field calibration of a pressure device involves collecting simultaneous pressure data or pressure and temperature data at two devices for multiple time points. Pressure differences between pairs of simultaneous data points of the collected pressure data are calculated. A model is fitted to the pressure differences and the temperatures and / or pressures, and model parameters are used to correct measurements from the second device. Alternatively, a pressure gradient is estimated for a region that encompasses the two devices for each time point. A distance is determined between the two devices. A pressure gradient difference is determined between the two devices for each time point. A pressure difference offset is obtained for one of the pairs of simultaneous data points for each time point. An average pressure difference offset is determined between the two devices and is used to correct measurements from one of the devices.

The invention relates to a DBF + LFMCW system zero intermediate frequency radar amplitude-phase high-precision closed-loop near-field calibration system and method. The method comprises the following steps: generating a test signal through a target echo simulator; a test signal is connected to a darkroom probe and is aligned with a certain receiving antenna of the radar, the radar equipment assembly receives the signal and mixes the signal with an internal local oscillator signal to obtain a zero intermediate frequency signal received by the channel, and meanwhile, the amplitude and the phase of the zero intermediate frequency signal are periodically collected and output to a terminal interface; a darkroom probe is controlled to be sequentially aligned with 1-N channels of a radar receiving antenna, zero intermediate frequency signals of each channel are collected and stored, recorded zero intermediate frequency data of all the channels are processed through a channel amplitude phase correction algorithm, and accurate correction of each channel is achieved. According to the invention, the baseband I / Q signals are directly collected and processed, so that accurate compensation of I / Q amplitude-phase inherent errors of each channel caused by DC offset, processing technology and the like can be realized.

The invention discloses a two-stage installation error outfield calibration method for a space target fine-following camera and a two-dimensional rotary table, and belongs to the technical field of error calibration. The method comprises the following steps: extracting shooting information of each angle in an inertial coordinate system according to a plurality of starry sky images at different shooting angles; according to the inertial sight vector truth value of the equator coordinate under the inertial coordinate system, calculating a horizon sight vector truth value under the east-north-sky coordinate system by combining a transfer matrix from the east-north-sky coordinate system to the inertial coordinate system; calculating a horizon sight vector measurement value of the corresponding angle according to the rotary table rotation angle of each angle and the equipment installation matrix; and inputting the errors of the truth values and the measured values of the horizon sight line vectors under all the shooting angles into a least square iterative algorithm for optimization calibration, and outputting an optimal rotary table installation matrix and an optimal camera installation matrix. Calibration of the fine-following camera of the ground test two-dimensional rotary table can be realized, and the pointing precision of the fine-following camera is improved.

The invention relates to the technical field of electric power measurement, in particular to a self-calibration method and system for measuring the metering function of a switch, and the method comprises the steps: a standard signal source carries out the current data point collection of a data collection time period at a fixed collection frequency, carries out the filtering processing of the collected data of the current data point, and obtains the current value of the data collection time period; determining a reference current signal required to be output by a standard signal source based on the acquired current value of the data acquisition time period; the metering module samples a reference current signal output by the standard signal source to obtain a metering sampling current; and carrying out error threshold comparison on the difference between the metering sampling current and the reference current signal, and carrying out self-calibration adjustment on the measurement switch based on a comparison result. Metering deviation is corrected in time, misoperation of overload protection and short-circuit protection is avoided, meanwhile, field calibration operation is simplified, and the self-calibration function can be completed without complex test equipment.

The invention discloses a portable light intensity verification device, and belongs to the technical field of environment and meteorological monitoring. The portable light intensity verification device comprises a voltage-stabilized power supply, a light source and a shading sealing cover, and the voltage-stabilized power supply is connected with the light source through an electric wire, supplies power to the light source and controls the light intensity of the light source; the light source is a group of LED lamp beads, the shading sealing cover is made of a hot good conductor, a plurality of open holes are formed in the shading sealing cover, and the LED lamp beads are fixedly arranged on the inner wall of the shading sealing cover through the open holes. A heat dissipation assembly can be further arranged to promote heat dissipation of the shading sealing cover. In the process of measuring the photolysis rate of the gas in the atmosphere by a spectroscopic method, the optical receiving head is covered by the shading sealing cover provided with the LED lamp beads, and the spectrograph is subjected to simple, rapid and reliable field calibration or verification, so that the verification work can be carried out without a standard optical platform, and the characteristics of accuracy, convenience and the like are achieved.

The invention discloses a portable microphone on-site calibration device and method, and solves the problems of high shutdown cost, long period, high risk, large environmental difference and the like caused by the fact that a microphone needs to be sent to an inspection laboratory for calibration in the prior art. The device comprises a sound calibrator module and an integrated control circuit module, the sound calibrator module is composed of a sound production unit, a reference microphone unit and a coupling cavity structure, and a microphone to be tested and a reference microphone form a closed air cavity through a coupling cavity to receive the same sound pressure signal; the control circuit module drives the signal generator to generate a calibration sound signal through the MCU controller, synchronously collects output voltage signals of the reference microphone and the microphone to be tested, and calculates the sensitivity of the microphone to be tested by combining environmental parameter correction of the temperature and air pressure sensor. According to the invention, plug and calibration are realized, operation is convenient, battery power supply is supported, and the device is suitable for field calibration in a complex environment, and has traceability, stability and environmental adaptability.

The invention provides an atmospheric particulate water-soluble ion analysis instrument calibration system and calibration method, and belongs to the technical field of atmospheric particulate measurement. The system comprises an atmospheric environment simulation measurement device and a portable calibration device. The atmospheric environment simulation measurement device simulates actual environmental conditions through an aerosol mixing cabin in a thermotank, and is equipped with various sensors to monitor temperature, air pressure and humidity. The portable calibration device is internally provided with an aerosol generator, a constant-speed diverter, a particle sensor and the like, and an aerosol sample can be generated on site for calibration. The calibration method comprises two parts of constructing a standard parameter database and performing field calibration, and the calibration precision is ensured by comparing a measured value of the particulate matter sensor with a particle size spectrum. According to the calibration system and the calibration method for the atmospheric particulate water-soluble ion analysis instrument, the problems that traditional calibration equipment is large in size and cannot be calibrated on site are solved, and reliable technical support is provided for on-site calibration of the atmospheric particulate water-soluble ion analysis instrument.

A method for three-dimensional (3D) field calibration of a machine vision system includes receiving a set of calibration parameters and an identification of one or more machine vision system imaging devices, determining a camera acquisition parameter for calibration based on the set of calibration parameters, validating the set of calibration parameters and the camera acquisition parameter, and controlling the imaging device(s) to collect image data of a calibration target. The image data may be collected using the determined camera acquisition parameter. The method further includes generating a set of calibration data for the imaging device(s) using the collected image data for the imaging device(s). The set of calibration data can include a maximum error. The method further includes generating a report including the set of calibration data for the imaging device(s) and an indication of whether the maximum error for the imaging device(s) is within an acceptable tolerance and displaying the report on a display.

The invention provides a reflector antenna field calibration device, and the device comprises a support assembly which is used for positioning and fixing a reflector antenna, and carrying out the testing and field calibration through a photogrammetry system, and is provided with a plurality of target points; the supporting assembly is used for supporting the bracket assembly and adjusting the height and the angle of the bracket assembly; wherein the supporting assembly is composed of a bottom plate, a supporting fixture and an adjusting module, the adjusting module is connected with the supporting fixture in a threaded connection mode and used for adjusting the height and the angle of the supporting assembly in the vertical direction, and the bottom plate is used for being connected with the support assembly; the support assembly is composed of a support bottom plate, a rotating shaft, a support fixture and an antenna installation bottom plate. The support bottom plate is connected with the support fixture and the supporting assembly, the rotating shaft is connected with the support bottom plate and used for being positioned with the supporting assembly and driving the support assembly to rotate so as to adjust the azimuth angle, and the antenna mounting bottom plate is connected with the support fixture and used for mounting and positioning a reflector antenna.

The invention discloses a field calibration method and system for an active defense device of a converter transformer. The field calibration method comprises the following steps: determining a calibration loop wiring mode, a test process and a calibration item qualification criterion for performing different types of performance calibration on the active defense device of the converter transformer; for any type of performance verification, determining a verification loop based on the verification loop wiring mode, and testing based on the test process to obtain test data; and for any type of performance verification, determining a verification result based on the test data and the corresponding verification item qualification criterion. Synchronous verification of the built-in ultrahigh-frequency channel, the built-in acoustic channel and the high-frequency channel is achieved, the response characteristics of the sensor under the composite working condition can be comprehensively reflected, the method is closer to the actual operation environment, and the accuracy and reliability of evaluation are remarkably improved; the test process is standardized, and the evaluation result repeatability is high; the test cost and complexity are reduced, and the test efficiency is improved.

The invention provides a testing device and a testing method for postprocessor temperature field calibration, and belongs to the technical field of internal combustion engine postprocessing, and the method comprises the following steps: installing the testing device, fixing a plurality of thermocouple probes on a base, and enabling the end surfaces of the thermocouple probes to extend to a specified measurement area of a diesel particle filter; triggering and starting a regeneration process of the diesel particulate filter under a target working condition, and synchronously collecting temperature data from the thermocouple probe in real time; calculating the maximum temperature gradient in the diesel particulate filter based on the temperature data; and comparing the maximum temperature gradient with a preset safety threshold, and adjusting a regeneration control strategy according to a comparison result. According to the invention, the test efficiency, the data accuracy and the economical efficiency are obviously improved.

The invention discloses an alternating current system residual current monitoring device operation verification device and method, and belongs to the technical field of residual current monitoring device verification, the verification device comprises a verification control unit, at least one verification unit and at least one verification CT; the verification control unit sends a control instruction to each verification unit according to the expected current of the to-be-verified residual current monitoring device so as to control the verification unit to output the current, and the current output port of each verification unit is short-circuited through the corresponding configured current output wire so that the current output by the verification unit flows through the current output wire. Meanwhile, a current output wire is wound around a current monitoring CT corresponding to the verification unit, so that the current monitoring CT can measure the real-time disturbance current and the output current of the circuit at the same time; and each verification unit measures the real-time disturbance current of the circuit through the correspondingly configured verification CT. The device can be used for operation field calibration, test acceptance and the like of the residual current monitoring device.

The application discloses a steel mill converter management and statistics system and method. The system comprises a production process monitoring module, a converter operation performance module, a production history tracing module, a converter stock material module and a data processing updating module. The production process monitoring module is used for monitoring and filling important data in the converter production process. The converter operation performance module is used for collecting various signal data and manually filling data in the converter production process. The production history tracing module is used for automatically and regularly counting the converter operation performance according to a set statistical method. The converter stock material module is used for setting the identification logic of part signals. The data processing updating module is used for regularly updating the data by combining the signal identification algorithm and the manual field calibration, supporting the query and screening based on the user selection, and providing the data export and backup functions. The application automatically collects, manually fills and automatically counts the related data in the converter production process of the steel mill, greatly saves the time and labor cost of data management, and improves the data management efficiency.

The application provides an array programmable temperature field calibration device and method, belonging to the technical field of temperature measurement and calibration. The device comprises a system control unit, a plurality of temperature control units, a bidirectional temperature control module and a composite heat insulation structure. The system control unit is used to generate control instructions corresponding to a target two-dimensional temperature distribution pattern, and a graphical interface is provided for users to set the pattern. The plurality of temperature control units are arranged in an array to form a radiation surface, and each temperature control unit receives independent control instructions. The bidirectional temperature control module is integrated in each temperature control unit, and is used to independently adjust the temperature of the radiation surface of the unit according to the received control instructions. The composite heat insulation structure is arranged between adjacent temperature control units, and is used to suppress the thermal cross talk between the units. The application can flexibly and efficiently generate a high-precision programmable two-dimensional temperature field, which is used for comprehensive calibration of non-contact temperature sensors.

The invention relates to the technical field of electromagnetic environment effect testing, and discloses a phased array multifunctional electromagnetic environment effect testing system and a calibration method thereof.The system comprises an active array plane, a comprehensive processing extension set, a comprehensive frequency source extension set, an external feed source combination, a superheterodyne receiver and a digital acquisition extension set; wherein the active array plane is provided with a plurality of minimum sub-arrays, each minimum sub-array is composed of at least one active channel and a corresponding radiation antenna unit, and each minimum sub-array is used for receiving one excitation signal to complete power amplification and radiation synthesis; and the path number of the independent excitation signals generated by the comprehensive frequency source extension set corresponds to the number of the minimum subarrays. The calibration method comprises darkroom plane near-field calibration, external feed source combination calibration and active array plane calibration before working. The system and the method provided by the invention have the advantages of relatively strong accurate construction capability of a complex electromagnetic environment, extremely high test flexibility, multi-beam coordination and high-precision full-link calibration, and stable and reliable operation.

The present invention relates to the technical field of LED display calibration, and specifically discloses a flat field calibration method, device, and flat field calibration system for a camera. The method includes obtaining a dark field photo; generating a dark field calibration photo according to a preset dark field calibration photo generation strategy and the dark field photo; obtaining a bright field photo; generating a flat field coefficient according to a preset flat field coefficient calculation strategy and the bright field photo; mapping to obtain a flat field calibration photo through a preset pixel value mapping strategy and the flat field coefficient; and correcting the original image through the dark field calibration photo, the flat field calibration photo, and a preset image correction strategy to obtain a corrected image. The flat field calibration method, device, and flat field calibration system for a camera of the present invention solve the problem of the influence of the non-uniformity of the detector response on the calibration effect of the camera, thereby ensuring the calibration effect during the calibration process of the camera, and presenting a better display effect when the LED display shows the corrected image.

The present application relates to electromagnetic environment effect test technical field, disclose a kind of phased array multifunctional electromagnetic environment effect test system and its calibration method, system includes active array surface and comprehensive processing extension, comprehensive frequency source extension, external feed source combination, superheterodyne receiver and digital acquisition extension;Wherein: active array surface has dry minimum subarray, each minimum subarray is formed by at least one active channel and corresponding radiating antenna unit, each minimum subarray is used to receive one way excitation signal to complete power amplification and radiate synthesis;And the number of independent excitation signal generated by comprehensive frequency source extension corresponds with the number of minimum subarray.The calibration method includes darkroom planar near-field calibration, external feed source combination calibration and active array surface calibration before work.The system and method of the present application have strong accurate construction ability of complex electromagnetic environment, extremely high test flexibility, multi-beam coordination and high-precision full-link calibration, stable and reliable operation.

The utility model relates to a composite loading device for field calibration of a sensor. The combined loading device comprises a base; the loading assembly comprises a supporting frame fixed on the base, a gear set, a worm and a worm gear are arranged on the supporting frame, the worm is matched with the worm gear, and a detachable lead screw is arranged in the center of the worm gear; the bearing plate is arranged on the base; the guide column is horizontally arranged; the first pressing plate and the second pressing plate are arranged on the guide columns and can move in the length direction of the guide columns, fixing pieces are arranged on the bearing plate, the first pressing plate and the second pressing plate, and a first force sensor to be corrected is arranged between the bearing plate and the first pressing plate through the fixing pieces. The composite loading device provided by the utility model can perform field calibration on a force sensor and a torque sensor, is compact in overall structure and convenient to operate, and improves the calibration efficiency.

The invention provides an image bright field correction method and device for a laser plasma accelerator, electronic equipment and a storage medium, and relates to the technical field of X-ray imaging. The method comprises the following steps: acquiring dark fields and initial X-ray beam spot images of an X-ray bright field calibration detector and an X-ray imaging detector to obtain coordinates of an initial X-ray beam spot center; under the condition that the imaging sample is moved in, a real-time unprocessed X-ray beam spot image obtained by the X-ray bright field calibration detector and a real-time unprocessed projection image obtained by the X-ray imaging detector are obtained, so that a real-time beam spot image and a real-time imaging image are obtained, and coordinates of a real-time X-ray beam spot center are obtained; according to the coordinate difference between the real-time X-ray beam spot center and the initial X-ray beam spot center, the X-ray beam spot center is obtained, and a final real-time projection image is obtained. According to the invention, the accuracy of bright field correction is improved by measuring the X-ray beam spot in real time and combining geometric space mapping and coordinate transformation.

The invention discloses an on-site zero setting method and device for a force sensor, and belongs to the technical field of industrial control. The invention provides a force sensor field zeroing method, aiming at solving the technical problems that the operation is time-consuming, the process is complicated and the zeroing precision is low because the existing force sensor field zeroing depends on a hardware manual knob resistor. Firstly, an ADC module collects an initial output voltage value of a force sensor Wheatstone bridge and transmits the initial output voltage value to a control module; the control module calculates a difference value delta V with a target zero value and judges a preset interval to which the delta V belongs; the corresponding DAC adjustment step length is matched according to the interval; controlling the DAC module to output an adjusting voltage to a bridge compensation end; the steps of sampling, judging and adjusting are executed circularly until delta V is smaller than or equal to 0.0001 V, and zero setting is completed; and finally, the final adjustment voltage of the DAC is stored in the storage module. Software control replaces traditional hardware manual operation, equipment disassembly and assembly are not needed, zero setting time consumption is shortened, operation complexity is reduced, zero setting precision is improved through adaptive step length and closed-loop control, and the method is suitable for field calibration of force sensors in scenes of electronic weighing instruments, industrial control, material testing machines and the like.

The application provides a field calibration system for calibrating a laser tracker, and belongs to the technical field of laser measurement. The field calibration system comprises a truss reference device, a plurality of target ball seats and a plurality of connecting rods. Two adjacent target ball seats are fixedly connected by a connecting rod, so that the plurality of target ball seats form a truss structure through the plurality of connecting rods. A target ball is configured to be selectively fixed to any one of the plurality of target ball seats. The laser tracker is configured to measure a plurality of spatial position data of the target ball in a base coordinate system when the target ball is fixed to the plurality of target ball seats. The base coordinate system is established with the base of the laser tracker as the origin. A parameter calibration device is in communication connection with the laser tracker and is configured to determine a measurement distance value between two adjacent target ball seats based on the plurality of spatial position data, and calibrate the laser tracker based on the standard length of the plurality of connecting rods and the plurality of measurement distance values.

The invention discloses a calibration-free soil dry density in-situ measurement method, and belongs to the technical field of soil physical property detection in geotechnical engineering and agricultural engineering. The method comprises the following steps: firstly, acquiring a volume dielectric constant epsilon and an environment temperature of soil in situ, and acquiring a mass water content omega of the soil in situ; secondly, determining physical parameters of the soil, wherein the physical parameters comprise a soil particle dielectric constant, a soil particle relative density and a water dielectric constant determined according to the temperature T; and finally, substituting the volume dielectric constant, the mass water content omega and the physical parameters of the soil into a calculation model constructed on the basis of a soil solid-liquid-gas three-phase mixed medium theory, and solving to obtain the dry density of the soil. According to the method, a calculation model is constructed based on physical characteristics of a soil solid-liquid-gas three-phase mixed medium, parameters which can be directly measured are obtained in situ, and the dry density is directly solved after the parameters are substituted into the model, so that tedious steps of field calibration in a traditional method are avoided, and in-situ, rapid and calibration-free measurement of the dry density of the soil is realized.

The invention discloses a field calibration device for an airborne navigation system, and belongs to the field of navigation system calibration. The device comprises a positioning and orienting system, a movable three-axis turntable and a portable industrial control all-in-one machine, the positioning and orientation system comprises a gyro north seeker, a laser tracker, a satellite receiver, an RTK data radio assembly, an antenna, a control acquisition box, a battery box, a tripod, a power cable, a gyro north seeker signal output cable, a laser tracker signal output cable, an antenna signal output cable and an acquisition signal output cable; the movable three-axis rotary table comprises an inner shaft table top, an inner code disc, a middle code disc, an outer code disc, an outer motor, an outer slip ring, an inner shaft worm and gear shaft system, a middle shaft worm and gear shaft system, a north guide mirror, a base, an electric control box, a main shaft driver, a power supply and a roller, the given angular position is realized by controlling the rotary table to rotate, and the given angular speed is realized by controlling the rotation angular rate; the attitude angle is given by controlling three axes of the rotary table and is used for attitude calibration of an airborne navigation system.

The invention discloses a seismic signal acquisition equipment frequency response parameter inversion method, device and system, and relates to the technical field of geophysical exploration. The method is executed by computer equipment in a frequency response parameter inversion system of the seismic signal acquisition equipment, and after seismic wave field response signals synchronously acquired by target node equipment and standard node equipment are received, preprocessing and transfer function estimation are sequentially carried out to obtain a relative transfer function of the equipment; secondly, optimizing model parameters of the frequency response mathematical model of the target node equipment by adopting a nonlinear optimization algorithm to obtain optimal model parameters for minimizing the target function, and finally, importing the optimal model parameters into the mathematical model to obtain an inversion calibration result of the frequency response parameters of the target node equipment. Therefore, the method is not only suitable for field calibration and periodic performance evaluation of equipment, but also suitable for centralized management of large-scale node equipment, and provides powerful technical support for seismic data quality control.

The utility model relates to the technical field of earthquake monitoring, and discloses an earthquake monitoring station field calibration device comprising a supporting seat; the rotating disc is rotationally connected to the supporting seat, and a pointer is arranged on the rotating disc; the supporting seat is located on the peripheral side of the rotating disc and provided with a dial, the dial is provided with scale marks, and the pointer points to the scale marks; the north seeker is mounted on the rotating disc, the north seeking direction of the north seeker is the same as the direction of the pointer, and the north seeker and the pointer rotate synchronously. According to the utility model, the north seeker is arranged on the rotating disk, the north seeker can determine the true north direction value of an attached carrier by measuring the rotation angular velocity of the earth, the process is not interfered and influenced by an external magnetic field or other environments, the north seeker and the pointer synchronously rotate, and when the orientation direction of the pointer is true north direction, the north seeker and the pointer are in real north direction. A seismometer may be mounted in this direction. Therefore, the installation precision of the seismometer is improved, manual operation errors are reduced, and the precision of earthquake monitoring and early warning is improved.

The present invention discloses a field calibration method for a terminal device of a variable air volume air conditioning system, which relates to the technical field of variable air volume air conditioning. The method includes the following steps: S1. Install a cross-shaped Pitot tube on the pipeline and connect it to the terminal controller respectively; S2. Read the measured pressure difference of the terminal controller through the communication protocol; at the same time, measure the pressure difference at the Pitot tube with a handheld pressure difference meter; S3. Under at least two working conditions, read the pressure difference measured by the handheld pressure difference meter and the measured pressure difference of the terminal controller respectively, and finally calculate the pressure difference coefficient k and the pressure difference deviation C through the formula:; S4. Set the calculated pressure difference coefficient k and pressure difference deviation C into the terminal controller. Through the handheld pressure difference meter, the present invention can perform relatively accurate calibration of the variable air volume terminal device on the project site, simplifies the calibration process, eliminates the need for complex laboratory equipment, and significantly improves the efficiency of on-site construction.

The invention relates to the technical field of intelligent medical building and traffic planning, in particular to a method for building a three-dimensional parking building in a hospital based on instant modeling and analogue simulation analysis, and solves the problem that a traditional planning method mainly depends on manual investigation and static capacity estimation. In order to solve the problems of backward data acquisition, single analysis dimension, decision dependence on subjective experience and insufficient prediction and evaluation ability in the prior art, the method comprises the following steps: S1, constructing a binocular depth camera operation environment, configuring ORB-SLAM, YOLOv8 and Byterack algorithms, and carrying out simulation test and field calibration; s2, field space properties are investigated on site, the EMR of a patient, namely electronic case data of the patient, is acquired and analyzed, main traffic flow lines of the patient are visualized, and high-frequency nodes and traffic paths are determined. According to the method, the defects of data lag, high subjectivity and the like of a traditional planning method are overcome, a whole-process quantitative decision from data acquisition, simulation modeling to scheme generation is realized, and the hospital traffic efficiency and the medical treatment quality are remarkably improved.