39results about How to "Realize distributed monitoring" patented technology

This invention relates to a strain monitor system for slope distributed fibers, which lays out several parallel special optical cables along the slope or at least lays out one close to the slope top and the corner separately, adheres symmetrically two fibers on the outer surface of a tilt testing tube to get the distortion of deep soil helped by the strain of the tube, the special optical cables are melted orderly to constitute a sensor circuit to be connected to BOTDR, which links with remote computers via local computer and internet to constitute distributed fiber strain monitor system and gets the distortion or displacement of the slope by integrating and summing the measured strain distribution further to evaluate and preset to the side slope.

The present invention provides a method of using distributed optical fibers for an advanced monitoring of tunnel surrounding rock deformation. A monitoring device related to the method comprises a distributed optical fiber measuring pipe, an optical fiber sensing line, a Brillouin backscattering light data acquisition facility, and a data processing and analyzing software. The method comprises the steps of symmetrically laying sensing optical fibers on the external surface of a PP-R pipe to manufacture the distributed optical fiber measuring pipe, by which the displacement of soil along the measuring pipe can be obtained; embedding the distributed optical fiber measuring pipe in the drilling hole in the overlying surrounding rock of the tunnel, and injecting couplant to form a measuring pipe of a soil-pipe compatible deformation type, wherein the measuring pipe deforms with the synchronous displacement of the surrounding rock; and realizing monitoring of the deformation or displacement of the surrounding rock by measuring the deformation of the measuring pipe. The method provided in the invention has the characteristics of a distributed type, automatic data acquisition, real time and advanced monitoring, etc., and is suitable for monitoring surrounding rock two dimensional deformation or displacement in the geotechnical engineering field such as a tunnel cavern, a coal mine tunnel, etc.

The invention is a fixed measuring method and system for earth deep distortion, the measuring system is made up of slant pipe, distributed fiber sensing channel, data collecting device, computer control model, and data processing model. It uses distributed fiber sensing technology based on self Brillouin dispersion theory, the sensing fibers are pasted on the external surface of the slant pipe, and then the slant pipe is embedded in the earth for measuring the distortion and shift of earth. When the deep earth moves, the earth drives the slant measuring pipe to generate distortion, the strain capacity of the external wall of the slant measuring pipe is changed, then uses BOTDR to measure the strain distribution of the fiber on the external wall of the slant measuring pipe directly, the collection process of data can be realized by computer control model, the data is induced into the data processing model by the computer control model, and the distortion quantity can be worked out according to a certain arithmetic, thus the distortion or shift of earth can be acquired.

The invention discloses an overhead wire icing on-line monitoring device based on machine vision, which is composed of hardware and software, wherein the hardware is divided into a lower computer and an upper computer; the lower computer hardware comprises a controlling and processing unit based on DSP, an image acquisition unit, a data acquisition unit, a data storage unit, a GPRS wireless communication unit and a solar energy photovoltaic light source unit; the upper computer hardware is composed of a monitoring center server unit and a GPRS wireless communication unit; and the upper computer hardware and the lower computer hardware realize wireless communication via a GPRS wireless network. The software is also divided into an upper computer and a lower computer, wherein, the lower computer software is in charge of driving the lower computer hardware to collect images and data, and the lower computer software calculates and judges icing thickness and type according to the collected image; then the GPRS wireless communication unit is driven to send compressed image and monitoring results to the upper computer; the upper computer software is in charge of driving upper computer hardware to finish GRPS wireless communication and realizes human-computer interaction interface and monitoring information management. The invention can monitor icing disasters on all sides.

The invention discloses an online monitoring system for the insulation state of a substation DC system. The system comprises multiple sets of DC leakage current detection devices and a signal merger and diagnosis unit. The DC leakage current detection devices are respectively used for detecting DC leakage current of all branches; each set of DC leakage current detection devices is provided with at least two DC leakage current detection devices which are used for detecting DC leakage current at different positions on the same branch respectively. The signal merger and diagnosis unit is used for detecting the voltage to earth of positive and negative buses and further wirelessly connected with all the DC leakage current detection devices to receive DC leakage current data transmitted by all the DC leakage current detection devices. The signal merger and diagnosis unit judges whether an insulation failure occurs or not and determines the position where the insulation failure occurs according to the detected voltage to earth of the positive and negative buses and the received DC leakage current data. The invention further discloses an online diagnosis method for the insulation state of the substation DC system.

The invention discloses a load small interfering RNA (siRNA) nanoscale lipid microbubble ultrasonic contrast agent and a preparation method. The load siRNA lipid microbubble is formed by preparing DPPC (Dipalmitoyl Phosphatidyl Choline), DSPE (1, 2-distearoyl-sn-glycero-3-phosphoethanolamine) and DPPA (Diphenyl Phosphoryl Azide) into microbubbles (containing octafluoropropane) according to the weight part ratio of 18:1:1 and then assembling together with PEG-PLL (Polyethylene Glycol-Polylysne)-coated siRNA nanomicelle. The load siRNA nanoscale lipid is nanosclae, has an obvious ultrasonic contrast effect, and can generate obvious siRNA cell transfection efficiency under low-frequency ultrasonic irradiation, thereby further hopefully having important research values and application prospects in the fields of ultrasonic diagnosis and gene treatment.

The invention discloses a distributed optical fiber monitoring system for tunnel surrounding rock deformation and construction and monitoring methods thereof. The monitoring system is composed of a first sensor, a second sensor, and an information system. The first sensor and the second sensor can be connected in series and then connected with the host interface of the information system to form a closed loop. According to the construction method, sensing fibers are symmetrically arranged in four grooves in the outer wall of a hollow circular pipe to form vertical and horizontal sensing loops, and sensors are embedded into pre-excavated trenches in the surrounding rock of a tunnel. According to the monitoring method, the vertical displacement distribution of the sensors can be calculated by performing differential and integral operations on the strain of the two fibers in the symmetrical first and second grooves of the hollow circular pipe. Distributed monitoring and real-time and advance monitoring are adopted. The data is stable and reliable. The cost is low. The monitoring system is suitable for dynamic real-time monitoring of the vertical and horizontal deformation of the surrounding rocks of existing highways under tunnels, tunnels, office buildings and other structures, and in influence areas of buildings.

The invention discloses a manufacturing technology of a glass fiber / epoxy resin composite material substrate type fiber bragg grating sensor. The manufacturing technology comprises the steps that glass fiber / epoxy resin prepreg is procured to prepare a glass fiber / epoxy resin composite material substrate; a fiber bragg grating is fixed to the glass fiber / epoxy resin composite material substrate; the glass fiber / epoxy resin composite material substrate fixed with the fiber bragg grating is covered with a dry-state glass fiber cloth, vacuum aided filling of liquid epoxy resin is performed, and secondary curing molding is performed. The manufacturing technology adopts the secondary curing molding in the packaging process, the interlayer interface strength is remarkably improved, accordingly the testing precision and stability of the fiber bragg grating sensor are improved, batch production of the fiber bragg grating sensor can be achieved, and the manufacturing technology has wide market prospect and huge economic benefit.

The invention relates to a fiber grating pressure sensor, a manufacture method and a method for monitoring the load of an asphalt pavement, belonging to the test field of a civil engineering sensor. The structure comprises a metal outer shell (1), a Bragg fiber grating (2) and a polymer part (3), wherein the Bragg fiber grating (2) is mounted in metal outer shell (1), the polymer part (3) is used for encapsulating the Bragg fiber grating (2) in the metal outer shell (1) and comprises a left cube, a right cube and a spindly horizontal cube, the left cube and the right cube are fixed at the lower side of an upper metal cover (4), the spindly horizontal cube is fixed between the left cube and the right cube, the structure is integrally in a dumbbell shape; the Bragg fiber grating (2) is encapsulated in the spindly horizontal cube of the polymer part (3) along the horizontal direction, and transmission fibers at both ends extend out of the left cube and the right cube. By utilizing the dumbbell-shaped structure in the invention, the sensibilization of the fiber grating pressure sensor is realized, and the sensitivity of the sensor is increased.

The invention discloses a tunnel surrounding rock deformation distributed optical fiber monitoring method and device based on pipe-shed support. The method comprises the following steps: A, drilling a hole in a guide pipe by using a pipe shed drilling machine and enabling a sleeve to follow up; B, sealing an optical fiber joint by using a plastic film after a pipe-shed steel tube are in place; C, gluing an optical fiber measuring tube single section at a steel tube mouth by using an inner connection pipe; D, splicing optical fiber measuring tube single sections; E, installing a drilling hole sealing device; and F, connecting in series the sensing fibers of the optical fiber measuring tube single sections at different monitoring positions of a tunnel pipe-shed support structure by using an extension adapter. The outer sidewall of the optical fiber measuring tube single section has orthogonally symmetrical grooves. The end of the optical fiber measuring tube single section is provided with an extension adapter for easy splicing. The guide pipe is inserted into a steel arch frame in an inclined manner. The pipe-shed steel tube is located inside the guide pipe. The optical fiber measuring tube single sections are located in the pipe-shed steel tube. The method and device achieve tunnel pipe-shed support surrounding rock distributed monitoring and advanced monitoring, and has economical, convenient, anti-interference and durable performance.

A distributed sensing system based on Brillouin scattering and chaotic optical signals includes a laser module (1), a first circulator (2), a first coupler (3), an optical switch (4), a chaotic laser signal generation control module (5), a first optical isolator (6), a second coupler (7), a first polarization controller (8), a first electro-optic modulator (9), a first optical amplifier (10), a second polarization controller (11), a second electro-optic modulator (12), an electrical signal modulation module (13), a bias voltage control module (14), a tunable optical delay line, a second optical amplifier, a scrambler (17), a second optical isolator, an optical fiber to be measured, a second circulator, a tunable optical filter, a photoelectric detection module, and a data acquisition and processing module. A Brillouin correlation analysis sensing system based on Brillouin scattering distributed optical time-domain analysis sensing and chaotic optical signals is realized, and a target can be located quickly and with high precision.

Provided is a method for monitoring an OPGW online with the use of the optical fiber sensing technology. According to the method, an OPGW is weighed by using an optical fiber Bragg grating tension sensor, a sensing signal of the optical fiber Bragg grating tension sensor is transmitted through an optical fiber core (1) of the OPGW and is connected with an optical fiber Bragg grating demodulator in a substation, and a Brillouin optical fiber demodulator in the substation monitors the OPGW through the optical fiber core (1) of the OPGW. The method can overcome the problem of cross sensitivity of temperature and strain of the Brillouin optical fiber demodulator, can be used for monitoring temperature, ice covering and ice melting states of the OPGW in real time in combination with other meteorological information and can be used for positioning a fault point with the use of the Brillouin optical fiber demodulation technology.

The invention provides a remote-sensing measuring and calculating method and device for the total amount of haze in the atmosphere. The remote-sensing measuring and calculating method comprises the steps of acquiring a satellite observation image of a selected haze pollution region; recognizing the haze region in the satellite observation image according to observed target recognition criteria corresponding to different wavebands of satellites, wherein the observed target recognition criteria at least comprise haze recognition criteria; and determining the total amount of haze in the selected haze pollution region according to the haze intensity, the haze region area, the haze thickness and a vertical distribution profile of the haze in the haze region. According to the invention, the haze pollution region can be recognized in real time according to the observed target recognition criteria corresponding to different wavebands of the satellites, the total amount of the haze is further calculated, vertical space structure detection for a haze pollution layer, whole layer thickness detection for the haze pollution and spatial distribution monitoring for the haze pollution are realized, frequently occurring regional haze pollution can be monitored in a quantitative manner, and the monitoring result is high in accuracy.

The invention discloses an isolation switch state distributed monitoring method and system and a medium. The monitoring method comprises the implementation steps; acquiring an isolation switch image of a target isolation switch; acquiring an included angle alpha between the two arms of the isolating switch through image analysis; and comparing the included angle alpha with closing and opening state included angle calibration values to determine the state of the target isolation switch. The system is a system corresponding to the monitoring method and a physical device for implementing the monitoring method, and a computer program programmed or configured to execute the monitoring method is stored on a medium. The method can achieve the distributed monitoring of the state of an isolation switch, improves the monitoring efficiency of the operation state of the isolation switch of a transformer substation, can accurately monitor the switching-on and switching-off states of a target isolation switch, is accurate and reliable in detection, high in detection speed, low in implementation cost and convenient and quick in deployment.

The invention discloses a multi-stage distributed monitoring and diagnosis method for cigarette tobacco making process based on partitioning and stratifying thoughts. The method comprises: identifyingdifferent monitoring requirements of a standby operation stage and a stable production stage of a cigarette tobacco making process, using thoughts of transverse equipment partitioning and longitudinal time stratifying, to establish a multi-stage distributed monitoring model for key equipment of a Sirox warming and dampening machine and a KLD sheet cut-tobacco drier in a cigarette tobacco making process, to realize single and concurrent abnormity effective detection of the cigarette tobacco making process, and abnormal reasons are accurately identified by a contribution plot method. A monitoring blind area of a standby operation stage of the cigarette tobacco making process is eliminated, catching capability of concurrent abnormity information of the process is improved, and the method canaccurately and effectively monitor and diagnose single and concurrent abnormity of different operation stages of key equipment in the cigarette tobacco making process.

The present invention relates to a slope monitoring multi-point displacement sensor based on fiber bending loss. The sensor comprises a plurality of displacement sensing units, there are one or more than one displacement sensing units which are connected in series in order, and each displacement sensing unit comprises one protective cover, one right connection leading optical fiber, one upper endtop plate, one capillary steel pipe, base materials, one lower end bottom plate, one left connection leading optical fiber and one optical fiber bow-tie modulation mechanism; the protective covers areconnected with the upper end top plates through bolts; the upper and lower surfaces of the base materials are fixedly connected with the upper end top plates and the lower end bottom plates; an axlewire of the base materials is provided with a guide groove hole, the capillary steel pipes pass through the guide groove hole, the lower ends of the capillary steel pipes are fixed at the lower end bottom plates, the upper ends of the capillary steel pipes are connected with the optical fiber bow-tie modulation mechanisms, and anchor heads are fixed at the lower surfaces of the lower end bottom plates; and the optical fiber bow-tie modulation mechanisms are arranged in the protective covers. The slope monitoring multi-point displacement sensor based on the fiber bending loss solves the problems of slope internal displacement distribution and remote real-time monitoring.

The invention discloses a distributed monitoring system and method for an NIFI task, belongs to the field of task monitoring, and aims to solve the technical problem of how to perform log statistics and monitoring on the NIFI from two aspects of tasks and steps. The system comprises a kafka distributed cluster, a relational database, wherein a log table is configured in the relational database; alog processor which is a component and comprises a task log processor and a step log processor; and a monitoring platform, used for reading the log sheet and displaying the log sheet through a monitoring interface. The method comprises the following steps: constructing a distributed monitoring system for an NIFI task, and configuring a log processor based on an NIFI task chain; performing log statistics on the NIFI task from two aspects of the task and the step through a log processor; and respectively displaying the task log table and the step log table through a monitoring interface to monitor tasks and steps.

The invention discloses a distributed online monitoring and positioning method of cable partial discharge based on the psi-OTDR principle. The method comprises the following steps: establishing a cable partial discharge ultrasonic generation model, and calculating the intensity of a partial discharge ultrasonic wave; establishing a transmission model of ultrasonic waves in a cable, and calculatingultrasonic sound pressure intensity at an installation position of an optical fiber; establishing a relationship model of an ultrasonic sound pressure and optical fiber strain, and calculating a variable of sensing optical fiber strain under the action of the ultrasonic waves after the partial discharge of the cable occurs; calculating the light intensity of backward Rayleigh scattered light in the optical fiber after the partial discharge of the cable; and judging and positioning the partial discharge of the cable. By adopting the distributed online monitoring and positioning method disclosed by the invention, the distributed monitoring and positioning of partial discharge of the cable can be realized, and the abnormal discharge of the cable is reported in time, furthermore, the anti-interference ability is high, less equipment is required, the cost is low, and the monitoring method is of great significance to the safe operation of the cable.

The invention relates to a technology for applying all-digital technology integration platforms to digital communities. Various digital subsystems can be remotely controlled and can be connected with one another on the basis of the all-digital technology integration platforms comprising hardware platforms and software platforms, resources can be shared by the different subsystems by means of data management, and information can be integrated among the different subsystems by means of data management; the subsystems are connected with one another, can be in linkage with one another under abnormal conditions and can quickly respond. The various subsystems run independently, the integral performance of other subsystems and the platforms can be prevented from being affected when problems of a certain subsystem occur, and accordingly the reliability of the platforms can be guaranteed. The all-digital technology integration platforms can be conveniently and quickly managed in a centralized manner in the aspects including addition, modification, deletion, monitoring and configuration information management and safety, permission, round-tour scheme, video plan, warning linkage or defense organization and cancelation strategy management. The technology has the advantages of advanced system architecture, large-scale expansion capacity, innovative structured storage, global resource management and the like.

According to the bridge body deformation form measuring device and method based on the inclination angle and vibration sensing mechanism, based on the new sensing mechanism of inclination sensitivity and vibration sensitivity, a fiber bragg grating inclination angle sensor is designed into a swing angle type fiber bragg grating inclination angle sensing and vibration sensing elastic structural body of a sensitization structure, and the detection sensitivity requirement is met through the sensibilization design; and according to the invention, the accumulated deformation of the bridge body and the inclination change of the bridge body can be monitored, the vibration monitoring capability is realized, the vibration caused by the sudden deformation of the bridge body can be monitored, the timely monitoring and early warning of the sudden deformation can be realized, and the dynamic monitoring of the bridge body is more comprehensive.

The invention discloses an intelligent well completion system based on optical fiber monitoring and layered flow control. The intelligent well completion system comprises a ground signal processing subsystem, a ground hydraulic subsystem, an underground dynamic monitoring subsystem and a plurality of flow control devices. The underground dynamic monitoring subsystem comprises a sensing optical fiber and a plurality of optical fiber sensor assemblies; the sensing optical fiber is arranged in an oil well casing in a penetrating mode and extends along an oil well; and the optical fiber sensor assemblies are fixedly arranged on the outer wall of an oil pipe and connected with the sensing optical fiber. The ground signal processing subsystem is electrically connected with the ground hydraulic subsystem through a control cable. The flow control devices are connected with the oil pipe and the ground hydraulic subsystem. The invention further provides an intelligent well completion method based on optical fiber monitoring and layered flow control. Underground distributed monitoring is realized, production halt monitoring is not needed, and the measurement cost is reduced. The detection precision is improved, and the monitoring system and the monitoring method which are high in reliability and high in stability are realized.

The invention relates to the technical field of heating and ventilation intelligent control, and discloses a heating and ventilation cloud edge cooperation system, which comprises at least one cloud server, a plurality of edge servers, a plurality of gateways, a plurality of acquisition terminals and a plurality of heating and ventilation devices, wherein the cloud server adjusts parameters of algorithm strategies stored in each edge server; the edge server generates a control instruction by adopting an algorithm strategy and sends the control instruction to the gateway; the gateway collects operation data and attribute data sent by the heating and ventilation equipment, maps the operation data and the attribute data to the edge server for storage, and maps a control instruction sent by the edge server to the heating and ventilation equipment, so that the heating and ventilation equipment executes corresponding operation according to the control instruction; the heating and ventilation equipment collects operation data generated during operation execution through the collection terminal; and the edge servers are mutually connected through a VPN and are used for mutually synchronizing operation data and control instructions so as to carry out distributed monitoring on the heating and ventilation equipment. According to the invention, sinking of a heating and ventilation control algorithm is realized, and the reliability of heating and ventilation equipment control is improved.

The invention belongs to the field of lining water pressure measurement, and provides a monitoring device and method for measuring a water pressure outside a lining of a deeply-buried tunnel. The device comprises a drill hole and an osmometer, and the drill hole is drilled in the middle of the side wall of the deeply-buried tunnel in the horizontal direction and extends out of an underground waterweak disturbance area. The osmometer is distributed and buried along the interior of the drill hole, and the exterior of each osmometer is wrapped and compacted through medium-coarse sands. Osmometerdata at different positions of the deeply-buried tunnel are input into far-field water head models corresponding to the different positions, calculation is conducted respectively, distributed monitoring of underground water at the different positions of the deeply-buried tunnel is achieved, and the problem that after the tunnel is excavated, space-time rule monitoring of underground water is notcomplete due to the fact that the underground water is affected by excavation is solved. A scientific basis is conveniently provided for design and calculation of the deeply-buried tunnel lining structure, and important guarantee is provided for long-term safe operation of a deeply-buried tunnel engineering structure.

The present invention discloses a pile foundation monitoring system based on a distributed fiber sensor. The system comprises a laser, a first coupler, a second coupler, a third coupler, a first detector, a second detector, a computing terminal and N sensing fiber foundation piles. The laser is connected with the first coupler; the first coupler is connected with the second coupler and the third coupler; the second coupler, the first detector and the computing terminal are connected in series in order; the third coupler, the second detector and the computing terminal are connected in series inorder; and a sensing arm fiber and a reference arm fiber which have the same length are connected between the second coupler and the third coupler. The sensing arm fiber is wound around the N sensingfiber foundation piles in order, and the reference arm fiber is wound around the N sensing fiber foundation piles in order. The pile foundation monitoring system based on a distributed fiber sensor is long in sensing distance and high in location precision, and obtained monitoring data is continuous and large in data volume and can timely and accurately provide deformation information.

The present invention relates to a slope monitoring multi-point displacement sensor based on fiber bending loss. The sensor comprises a plurality of displacement sensing units, there are one or more than one displacement sensing units which are connected in series in order, and each displacement sensing unit comprises one protective cover, one right connection leading optical fiber, one upper endtop plate, one capillary steel pipe, base materials, one lower end bottom plate, one left connection leading optical fiber and one optical fiber bow-tie modulation mechanism; the protective covers areconnected with the upper end top plates through bolts; the upper and lower surfaces of the base materials are fixedly connected with the upper end top plates and the lower end bottom plates; an axlewire of the base materials is provided with a guide groove hole, the capillary steel pipes pass through the guide groove hole, the lower ends of the capillary steel pipes are fixed at the lower end bottom plates, the upper ends of the capillary steel pipes are connected with the optical fiber bow-tie modulation mechanisms, and anchor heads are fixed at the lower surfaces of the lower end bottom plates; and the optical fiber bow-tie modulation mechanisms are arranged in the protective covers. The slope monitoring multi-point displacement sensor based on the fiber bending loss solves the problems of slope internal displacement distribution and remote real-time monitoring.

The invention relates to the technical field of hoisting equipment, in particular to a spatial positioning device for a bridge crane. The spatial positioning device comprises an all-in-one machine, a microstructure optical fiber, an optical fiber fixing device, a wireless transmitting device and a control center of the crane; the signal output end of the all-in-one machine is electrically connected with the signal input end of the wireless transmitting device, the wireless transmitting device realizes real-time data transmission with the control center of the crane through a wireless communication technology, the microstructure optical fiber is electrically connected to the signal input end of the all-in-one machine, a plurality of sensing nodes are etched on the microstructure optical fiber, and the plurality of sensing nodes are distributed on the microstructure optical fiber at equal intervals. The invention further discloses a spatial positioning method for the bridge crane. The distributed acoustic sensing (DAS) system based on the microstructure optical fiber is applied to spatial positioning of the crane, the cost of the system is greatly saved, the complexity of the sensing system is reduced, and the spatial positioning method has the advantages of being high in electromagnetic interference resistance, long in sensing distance and the like.

The invention relates to a crack monitoring sensor and use method thereof based on an OTDR (optical time domain reflectometry) technique, and belongs to the technical field of monitoring of optical fibers. The crack monitoring sensor comprises a protection box, a bare optical fiber coil, a first optical fiber with a protecting layer, and a second optical fiber with a protecting layer, wherein the bare optical fiber coil is provided with two end joints, the bare optical fiber coil is an optical fiber coil which is formed by winding and knotting a bare optical fiber, and the diameter of the bare optical fiber coil is 14mm to 16mm. When the crack monitoring sensor is used, firstly, the outer optical fiber of the sensor is welded with the first optical fiber with the protecting layer and the second optical fiber with the protecting layer through the end joints, secondly, the adhering function of epoxy resin adhesive is released by an adhesive release agent, so that the inner optical of the sensor is ensured to be freely stretched along with the extension of the crack, and then the concrete is cast. The crack monitoring sensor and the use method have the advantages that the construction is convenient, the manufacturing is simple, the cost is low, the crack monitoring sensor and the use method are suitable for monitoring the cracks of various types of concrete inner structures, meanwhile, the operability is high, and the real-time monitoring and the distributed monitoring on the concrete inner structures are realized.

The invention provides a method for automatically reading and identifying pointer dial data based on computer vision identification, which comprises the following steps of: S1, writing a data set DS, and putting coordinates of each dial scale and an actual physical value corresponding to the scale; s2, cutting the testImage, and separating the dial image from the testImage to obtain an image cropImage; s3, performing perspective transformation on the cropImage to obtain a rectangular image correctImage of which the size is the same as that of the template; s4, carrying out threshold segmentation on the correctImage to obtain a pointer position; s5, the position of the pointer corresponds to the scale position in the modelImage, data are read out from the data set DS, the problems that the manual verification process consumes long time, errors are likely to be introduced, and verification precision is affected are solved, and manual execution is changed into automatic execution; the labor intensity is reduced, and the calibration efficiency and the calibration precision of the pointer meter are improved.