CN114440763A - Fuel assembly on-line measuring device and method - Google Patents
Fuel assembly on-line measuring device and method Download PDFInfo
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- CN114440763A CN114440763A CN202011221549.5A CN202011221549A CN114440763A CN 114440763 A CN114440763 A CN 114440763A CN 202011221549 A CN202011221549 A CN 202011221549A CN 114440763 A CN114440763 A CN 114440763A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/167—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by projecting a pattern on the object
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- General Engineering & Computer Science (AREA)
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- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention relates to the technical field of fuel assembly detection, in particular to a fuel assembly online measuring device which comprises a fixed base detachably arranged at a measuring station, a clamping rod arranged on the fixed base and a plurality of measuring heads arranged on the clamping rod at intervals along the axial direction of the clamping rod and corresponding to a plurality of parts to be measured on a fuel assembly to be measured one by one, wherein each measuring head comprises a laser generator for projecting laser to a surface to be measured corresponding to the part to be measured and a picture collector for collecting an image of the surface to be measured on which the laser is projected, and all the laser generator and the picture collector are connected with a controller. The fuel assembly on-line measuring device is mainly characterized in that a laser generator projects laser to a surface to be measured of a part to be measured of the fuel assembly to be measured, an image collector collects an image of the surface to be measured on which the laser is projected, and a controller processes and analyzes working data of a measuring head. The measurement is accurate and the measurement precision is high.
Description
Technical Field
The invention relates to the technical field of fuel assembly detection, in particular to a fuel assembly online measuring device and method.
Background
The fuel assembly is in a high-temperature, high-pressure and high-radiation environment for a long time during the operation of the reactor core, and can be bent, twisted and the like. When loading and unloading, fuel assembly is transported to the fuel factory building by the reactor core factory building, and in the transportation process, fuel assembly can overturn basket department in fuel factory building side and promote supreme spacing through the spentnuclear fuel operation instrument. In view of the current material loading and unloading situation of the nuclear power station, the situation that the time window for loading and unloading materials is prolonged due to deformation of the fuel assembly occurs occasionally, the economic benefit of the nuclear power station is seriously influenced, and the deformed fuel assembly easily scrapes surrounding assemblies to cause potential safety risks to the operation of the nuclear power station. Therefore, it is necessary to measure and detect the deformation of the fuel assembly.
At present, domestic nuclear power practitioners realize fuel assembly deformation measurement through various technical methods, and can be divided into a pool edge measurement method and an on-line measurement method according to whether the fuel assembly deformation measurement is completed during loading and unloading. The pool-side measuring method is to move a fuel assembly to be measured to a station to be measured at the side of a spent fuel pool through a fuel grabbing machine, to realize deformation measurement of the fuel assembly through a contact type measuring method such as an LVDT (Linear Variable Differential Transformer), and the like. The online measurement method is used for realizing the deformation measurement of the fuel assembly in the process of transferring the fuel assembly from the reactor core plant to the fuel plant, and does not influence the material loading and unloading operation. The existing online measurement methods comprise the following steps: the first method is that the deformation of the fuel assembly is measured by an ultrasonic distance measurement method when the fuel assembly passes through a side water gate of a fuel plant, the method needs the fuel assembly to stay for a period of time and rotate each surface of the fuel assembly to complete the measurement of the whole deformation of the fuel assembly, so the method needs to intervene in the operation process of loading and unloading materials; secondly, shooting and measuring the fuel assembly when the fuel assembly is separated from the position of the tilting basket by adopting a local scale comparison method or a local grating method at the position of the tilting basket at the side of the fuel plant room, and completing the calculation of the integral three-dimensional deformation of the fuel assembly by later-stage image splicing; and thirdly, measuring the deformation of the fuel assembly by adopting a binocular vision non-contact method, and completing three-dimensional measurement by taking a picture of a surface to be measured and carrying out contour recognition registration.
Disclosure of Invention
The invention aims to provide a fuel assembly on-line measuring device and method with accurate measurement and high measurement precision, so as to overcome the defects in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a fuel assembly on-line measuring device, install the fixed baseplate in survey station department including detachably, install the supporting rod on fixed baseplate and install a plurality of gauge heads on the supporting rod along the axial interval ground of supporting rod, a plurality of positions one-to-ones that await measuring on a plurality of gauge heads and the fuel assembly that awaits measuring, every gauge head all includes to the face that awaits measuring of the position that corresponds throws the laser generator of laser and the picture collector of the image of the face that awaits measuring that throws laser, all laser generators and picture collector all are connected with the controller.
Preferably, the clamping device further comprises a ground height adjusting block arranged on the ground at the measuring station, wherein the fixing base is detachably arranged on the ground height adjusting block, and the ground height adjusting block enables the axis of the clamping rod to be perpendicular to the horizontal plane.
Preferably, the clamping rod is installed on the fixed base through a connecting rod, and two ends of the connecting rod are detachably connected with the fixed base and the clamping rod respectively.
Preferably, the probe is mounted on the clamping bar by a retaining ring.
Preferably, the single probe comprises a plurality of laser generators arranged in parallel.
Preferably, the single measuring head is an integral part integrally packaged by the laser generator and the picture collector.
Preferably, the single measuring head is a separate piece which is formed by separately packaging the laser generator and the picture collector.
The fuel assembly online measuring method adopts the fuel assembly online measuring device, and sequentially comprises the following steps of: step S1, mounting and fixing the fixed base at the measuring station; step S2, placing a simulated fuel assembly at the appointed measuring position for measuring the fuel assembly to be measured, starting a measuring head, verifying the relative position relation between the measuring head and the part to be measured on the simulated fuel assembly, closing the measuring head after verification is finished, and removing the simulated fuel assembly; step S3, placing a calibration fuel assembly at the specified measurement position, starting a measuring head, calibrating the parameters of the measuring head, closing the measuring head after calibration is finished, and removing the calibration fuel assembly; step S4, enabling the fuel assembly to be measured to pass through the appointed measuring position, starting the measuring head when the fuel assembly to be measured reaches the appointed measuring position, projecting laser to the surface to be measured of the part to be measured on the fuel assembly to be measured by the laser generator, collecting the image of the surface to be measured on which the laser is projected by the picture collector and transmitting the collected image to the controller, processing and analyzing the working data of the measuring head by the controller to obtain a measuring result, and closing the measuring head after the measurement is finished; and step S5, repeating the step S4, and sequentially measuring a plurality of groups of fuel assemblies to be measured.
Preferably, in step S1, a floor height adjusting block is installed on the floor at the measuring station, and then the fixing base is installed and fixed on the floor height adjusting block, wherein the floor height adjusting block makes the axis of the clamping rod perpendicular to the horizontal plane.
Compared with the prior art, the invention has the remarkable progress that:
the laser generator of the measuring head projects laser to the surface to be measured of the part to be measured on the fuel assembly to be measured, the image of the surface to be measured on which the laser is projected is collected by the picture collector, and the actual position of the laser is analyzed and calculated by the controller, so that the deformation or the size of the fuel assembly to be measured can be measured by the active visual measurement method of underwater laser projection, the integral bending deformation or the local size of the fuel assembly to be measured can be measured in real time and on line during the transportation of the fuel assembly to be measured, the operation process of loading and unloading is not influenced, compared with the prior art that the picture of the fuel assembly is directly shot, the laser has the characteristics of high brightness and outstanding characteristics, therefore, the invention can overcome the influence on the image imaging quality caused by the illumination of the site environment, the thermal turbulence, the unobvious surface characteristics of the fuel assembly and the like, and accurately reflect the surface position information of the surface to be measured of the fuel assembly to be measured, and the integral high-precision measurement of the fuel assembly to be measured is realized.
Drawings
Fig. 1 is a schematic structural view of an on-line measuring device for a fuel assembly according to an embodiment of the present invention.
FIG. 2 is a schematic flow chart of a fuel assembly on-line measurement method according to an embodiment of the invention.
Wherein the reference numerals are as follows:
1. fixed base 2, supporting rod
3. Measuring head 31 and laser generator
32. Picture collector 4 and controller
5. Ground height adjusting block 6 and connecting rod
7. Fixing ring 8 and fuel assembly to be tested
81. Upper pipe seat 82, lower pipe seat
83. Location grillwork
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in FIG. 1, one embodiment of the fuel assembly on-line measuring device of the present invention is shown. The fuel assembly on-line measuring device of the embodiment comprises a fixed base 1, a clamping rod 2, a measuring head 3 and a controller 4.
Wherein, the fixed base 1 is detachably installed at the measurement station, the measurement station refers to the working position of the fuel assembly on-line measuring device when the fuel assembly on-line measuring device of the embodiment is used for carrying out on-line measurement on the fuel assembly 8 to be measured, the working position can be selected and appointed according to the field actual condition and the measurement requirement of the fuel assembly 8 to be measured, for example, the working position can be arranged in a fuel plant transfer channel or a reactor core plant transfer channel, and also can be arranged at a spent fuel pool or a fuel plant loading well. The fuel assembly on-line measuring device of the embodiment is installed and fixed at a measuring station through the fixing base 1, so that the device is stable in the working process; the fixed base 1 adopts the detachable mounting mode at the measurement work position, so that the fuel assembly on-line measuring device of the embodiment can be applied to different measuring stations, and the on-line measurement requirements of different field conditions are met.
Supporting rod 2 is installed on fixed baseplate 1, and supporting rod 2 is used for the installation to support gauge head 3, and gauge head 3 is equipped with a plurality ofly, and a plurality of gauge heads 3 are installed on supporting rod 2's outer peripheral face along supporting rod 2's axial interval to, a plurality of positions one-to-ones that await measuring on a plurality of gauge heads 3 and the fuel assembly 8 that awaits measuring. The fuel assembly generally includes a skeleton including an upper stem 81, a lower stem 82, and a plurality of spacer grids 83 provided between the upper stem 81 and the lower stem 82, and fuel rods disposed in the skeleton, and different types of fuel assemblies have different numbers of spacer grids 83, for example, an AP1000 fuel assembly has eight spacer grids 83. The fuel assembly online measuring device of the embodiment may be used for measuring the overall deformation of the fuel assembly, or may be used for measuring the local object size (such as the width of the spacer grids 83 and the distance between the fuel rods) of the fuel assembly, so that the to-be-measured portion of the to-be-measured fuel assembly 8 may be selected and specified according to the measurement requirement, for example, when the overall deformation of the to-be-measured fuel assembly 8 is measured, the position information of the upper pipe seat 81, the lower pipe seat 82 and each spacer grid 83 of the to-be-measured fuel assembly 8 needs to be obtained at the same time, and therefore the upper pipe seat 81, the lower pipe seat 82 and each spacer grid 83 are a plurality of to-be-measured portions of the to-be-measured fuel assembly 8. The number of the measuring heads 3 is matched with the number of the parts to be measured on the fuel assembly 8 to be measured, so that the number of the measuring heads 3 is not limited, and different numbers of measuring heads 3 can be set according to different types of the fuel assembly 8 to be measured, specifically different numbers of the spacer grids 83 of the fuel assembly 8 to be measured. Each of the measuring heads 3 includes a laser generator 31 and a picture collector 32. The laser generator 31 is configured to project laser to a surface to be measured of a portion to be measured on the corresponding fuel assembly 8 to be measured, and the laser form projected by the laser generator 31 is not limited, and may be linear laser, point laser, or structured light. The image collector 32 is used for collecting an image of a surface to be measured on which the laser is projected from the part to be measured on the fuel assembly 8 to be measured. The laser generators 31 and the picture collectors 32 of all measuring heads 3 are connected with the controller 4 through cables, the picture collectors 32 transmit collected image information of the to-be-measured surface containing laser to the controller 4, the controller 4 receives the image information and processes and analyzes working data of all measuring heads 3, actual positions of the laser can be calculated based on a laser triangulation method, and measuring results are obtained.
The fuel assembly on-line measuring device of the embodiment projects laser to the surface to be measured of the part to be measured on the fuel assembly 8 to be measured through the laser generator 31 of the measuring head 3, the image of the surface to be measured on which the laser is projected is collected through the picture collector 32, and the actual position of the laser is calculated by the controller 4 based on the laser triangulation method, so that the deformation or the size of the fuel assembly 8 to be measured can be measured by an active visual measuring method of underwater laser projection, the whole bending deformation or the local size of the fuel assembly 8 to be measured can be measured in real time on-line during the transportation of the fuel assembly 8 to be measured, the material loading and unloading operation process is not influenced, compared with the prior art that the picture of the fuel assembly is directly shot, the laser has the characteristics of high brightness and outstanding characteristics, therefore, the fuel assembly on-line measuring device of the embodiment can overcome the influences of the image imaging quality such as illumination of the field environment, the thermal turbulence, the unobvious surface characteristics of the fuel assembly and the like, accurately reflects the surface position information of the surface to be measured of the fuel assembly 8 to be measured, and realizes the integral high-precision measurement of the fuel assembly 8 to be measured.
Preferably, the fuel assembly on-line measuring device of this implementation also includes ground height adjusting block 5, and ground height adjusting block 5 is installed on the ground of survey station department for realize the adjustment of ground levelness, in order to guarantee that the straightness that hangs down of the fuel assembly on-line measuring device of this implementation is not influenced by ground slope. The fixed base 1 is detachably mounted on the ground height adjusting block 5, and preferably, the fixed base 1 and the ground height adjusting block 5 can be locked through bolts, so that the detachable fixed base has the advantage of convenience in disassembly and assembly. The ground height adjusting block 5 makes the axis of the clamping rod 2 perpendicular to the horizontal plane, i.e. ensures the verticality of the clamping rod 2, so that the laser emitted by the laser generator 31 of each measuring head 3 can be horizontally projected onto the surface to be measured of the part to be measured on the fuel assembly to be measured 8. Preferably, the four corners of the lower surface of the ground height adjusting block 5 are respectively provided with a height-adjustable support leg, so as to adjust the levelness of the ground.
Preferably, in this embodiment, supporting rod 2 is installed on fixed baseplate 1 through connecting rod 6, and the both ends of connecting rod 6 are connected with fixed baseplate 1 and supporting rod 2 detachably respectively, realize the installation of supporting rod 2 on fixed baseplate 1 from this to, through dismantling the connecting rod 6 of changing different length, can realize the adjustment of 2 mounting height positions of supporting rod, thereby realize the adjustment of gauge head 3 positions, make a plurality of positions one-to-ones that await measuring on each gauge head 3 and the fuel assembly 8 that awaits measuring correspond. Preferably, the both ends of connecting rod 6 all are equipped with the flange, and at least one tip of supporting rod 2 also is equipped with the flange, and the flange of connecting rod 6 one end passes through the bolt to be connected fixedly with fixed baseplate 1, and the flange of the connecting rod 6 other end passes through bolted connection fixedly with the flange of supporting rod 2.
Preferably, in this embodiment, each probe 3 is mounted on the gripping rod 2 by a fixing ring 7. Preferably, the outer peripheral profile of the clamping rod 2 provides a holding surface for the fixing ring 7, that is, the fixing ring 7 holds the clamping on the outer peripheral surface of the clamping rod 2 tightly, and clamps the measuring head 3 and the cable on the clamping rod 2, so as to fix the mounting of the measuring head 3 on the clamping rod 2. The gripping shank 2 is preferably a long cylindrical circular shank.
Preferably, in this embodiment, the single measuring head 3 may include a plurality of laser generators 31 arranged in parallel. The number of laser generators 31 is not limited and can be increased or decreased according to the measurement requirement. Preferably, the plurality of laser generators 31 are arranged in parallel on the same horizontal plane, and the picture collector 32 is located above the plurality of laser generators 31 and forms an included angle with the laser generators 31. In this embodiment, the single measuring head 3 may be an integral piece integrally packaged by the laser generator 31 and the picture collector 32, and the single measuring head 3 may also be a separate piece separately packaged by the laser generator 31 and the picture collector 32. In this embodiment, the picture collector 32 is preferably a high resolution camera.
In this embodiment, the form of the controller 4 is not limited, and a commonly used controller in the prior art, such as a PLC controller or a single chip microcomputer, may be used. Preferably, the controller 4 is provided with a GPU (Graphics Processing Unit), image information of the to-be-detected surface containing the laser, which is acquired by the picture acquirer 32, is transmitted to the controller 4 in real time, the GPU image Processing Unit performs image Processing, based on the processed image, the GPU computing module generates position information of the to-be-detected part on the to-be-detected fuel assembly 8 through laser triangulation method, and graphically displays the position information on an upper computer, so that the purpose of displaying deformation or size conditions of the fuel assembly in real time can be achieved, and efficient refueling of loading and unloading operators can be assisted. The calculation and display of the measurement result by the controller 4 and the GPU according to the received work data of the gauge head 3 are well known in the art, and are not described herein. Through practical verification, the fuel assembly on-line measuring device of the embodiment has the advantages that the required time for automatically acquiring and calculating the working data of the measuring head 3 is within 3s, the measuring precision can reach 0.5mm, the measuring process does not influence the material loading and unloading operation process, and the on-line measuring requirement of the fuel assembly during material loading and unloading can be met.
Based on the fuel assembly online measuring device, the embodiment of the invention also provides a fuel assembly online measuring method. Referring to fig. 2, the fuel assembly on-line measuring method of the present embodiment is performed using the fuel assembly on-line measuring apparatus of the present embodiment, and includes the following steps in sequence.
And step S1, mounting and fixing the fixed base 1 at the measuring station, and finishing the mounting and fixing of the fuel assembly on-line measuring device at the measuring station. The measuring station can be arranged in a fuel plant transfer channel or a reactor core plant transfer channel, and can also be arranged at a spent fuel pool or a loading well of a fuel plant. Preferably, the assembly of the fixed base 1, the connecting rod 6, the clamping rod 2, the measuring head 3 and the fixing ring 7 of the fuel assembly online measuring device can be completed firstly, the ground height adjusting block 5 is installed on the ground at the measuring station, the adjustment of the ground levelness is realized through the ground height adjusting block 5, so that the verticality of the fuel assembly online measuring device is not affected by the ground inclination, then the fixed base 1 is installed and fixed on the ground height adjusting block 5, and the measuring head 3 is connected with the controller 4 through a cable, so that the installation and the fixation of the fuel assembly online measuring device at the measuring station are completed. The ground height adjusting block 5 makes the axis of the clamping rod 2 perpendicular to the horizontal plane, i.e. the perpendicularity of the clamping rod 2 is ensured, so that the laser emitted by the laser generator 31 of each measuring head 3 is horizontally projected. In order to realize three-dimensional measurement of the fuel assembly 8 to be measured, after the fuel assembly on-line measuring device is installed and fixed at a measuring station, the laser generator 31 of each measuring head 3 corresponds to a long edge on the peripheral profile of the fuel assembly 8 to be measured, so that laser emitted by the laser generator 31 of each measuring head 3 can be horizontally projected onto two surfaces of the fuel assembly 8 to be measured, which are adjacent to the long edge, and the other two surfaces of the fuel assembly 8 to be measured are symmetrical with the long edge, so that the three-dimensional overall surface condition of the fuel assembly 8 to be measured can be obtained.
Step S2, placing the simulated fuel assembly at the designated measurement position for measuring the fuel assembly 8 to be measured, where the designated measurement position is the position of the fuel assembly 8 to be measured when the fuel assembly 8 to be measured is measured selected on the transfer track of the fuel assembly 8 to be measured, and the position corresponds to the measurement station, for example, when the measurement station is selected as the inside of the transfer passage of the fuel plant, the measurement position may be selected as the upper limit of the tilt basket lift of the transfer passage of the fuel plant, that is, when the fuel assembly 8 to be measured reaches the upper limit of the tilt basket lift along with the lift of the tilt basket in the transfer passage of the fuel plant, the fuel assembly 8 to be measured is measured. Preferably, after the fuel assembly on-line measuring device is installed and fixed on the ground of the fuel plant transportation channel, the clamping rod 2 extends into the transportation channel below the water surface, and the laser generator 31 of each measuring head 3 is located at the position 1m away from the inclined diagonal angle of the tilting basket of the fuel plant transportation channel. The simulated fuel assembly is a simulation for simulating the fuel assembly 8 to be measured, and the height position dimension of the portion to be measured on the simulated fuel assembly is identical to the height position dimensions of the upper nozzle 81, the lower nozzle 82, and the spacer grids 83 of the actual fuel assembly 8 to be measured. After the simulated fuel assembly is placed in place, the measuring head 3 is started, the relative position relation between the measuring head 3 and the part to be measured on the simulated fuel assembly is verified, and after the verification is finished, the measuring head 3 is closed and the simulated fuel assembly is removed. Whether this verification is used for verifying fuel assembly on-line measuring device's mounting height position correct, opens gauge head 3 back, and the laser that the laser generator 31 of each gauge head 3 sent should be able to the level to throw the position that awaits measuring that corresponds on the simulation fuel assembly, otherwise, need adjust gauge head 3's height position, and this adjustment can be realized through changing the connecting rod 6 of different length.
Step S3, placing a calibration fuel assembly at the specified measurement position, the calibration fuel assembly being a simulation piece simulating the fuel assembly 8 to be measured, and the size of the calibration fuel assembly being the same as the size of the fuel assembly 8 to be measured. After the calibration fuel assembly is placed in place, the measuring head 3 is started, parameters of the measuring head 3 are calibrated, and after calibration is finished, the measuring head 3 is closed and the calibration fuel assembly is removed. The calibration is used for detecting and obtaining actual relative position relation parameters (including height, angle and the like) of each measuring head 3, so that measurement data results of each measuring head 3 are unified in the same coordinate system.
Step S4, recording the number of the fuel assembly 8 to be measured, making the fuel assembly 8 to be measured pass through the designated measurement position, starting the probe 3 when the fuel assembly 8 to be measured reaches the designated measurement position, projecting laser to the surface to be measured of the portion to be measured (such as the upper pipe seat 81, the lower pipe seat 82 and each positioning grid 83) on the fuel assembly 8 to be measured by the laser generator 31 of the probe 3, collecting the image of the surface to be measured on which the laser is projected by the picture collector 32 of the probe 3 and transmitting the collected image information of the surface to be measured containing the laser to the controller 4, and the controller 4 receiving the image information and processing and analyzing the working data of the probe 3 to obtain the measurement result. Preferably, the GPU image processing unit may perform image processing, and based on the processed image, the GPU calculation module calculates and generates position information of the part to be measured on the fuel assembly to be measured 8 by using a laser triangulation method and displays the position information graphically on the upper computer. And closing the measuring head 3 after the measurement is finished.
And S5, repeating the step S4, and sequentially measuring the multiple groups of fuel assemblies 8 to be measured so as to finish the measurement of all the fuel assemblies of the reactor core.
After all the fuel assemblies 8 to be measured are measured, the controller 4 outputs all the measurement results, so that all the fuel assembly deformation or dimension measurement of a reactor core can be completed on line during loading and unloading, the operation condition of the fuel assemblies can be comprehensively and systematically evaluated, data support is provided for fuel management personnel to analyze the reliability of fuel and the safe operation of a unit, the fuel assembly deformation distribution map generated by the controller 4 can be filed, and the fuel assembly deformation measurement data accumulated in each cycle can provide quantitative analysis reference for the operation state of the fuel assemblies in a period or in a period.
In the fuel assembly on-line measuring method of the embodiment, laser is projected to the surface to be measured of the part to be measured on the fuel assembly 8 to be measured through the laser generator 31 of the measuring head 3, the image of the surface to be measured on which the laser is projected is collected through the picture collector 32, and the actual position of the laser is calculated by the controller 4 based on the laser triangulation method, so that the deformation or the size of the fuel assembly 8 to be measured is measured by an active visual measuring method of underwater laser projection, the whole bending deformation or the local size of the fuel assembly 8 to be measured can be measured in real time on line during the transportation of the fuel assembly 8 to be measured, the material loading and unloading operation process is not influenced, compared with the prior art that the picture of the fuel assembly is directly shot, the laser has the characteristics of high brightness and outstanding characteristics, therefore, the fuel assembly on-line measuring method of the embodiment can overcome the influences of the image imaging quality such as illumination of the field environment, the thermal turbulence and the unobvious surface characteristics of the fuel assembly, accurately reflects the surface position information of the surface to be measured of the fuel assembly 8 to be measured, and realizes the integral high-precision measurement of the fuel assembly 8 to be measured.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a fuel assembly on-line measuring device, its characterized in that includes that detachably installs fixed baseplate (1) in measuring station department, installs supporting rod (2) on fixed baseplate (1) and follow install at the axial interval of supporting rod (2) a plurality of gauge head (3) on supporting rod (2) are a plurality of position one-to-one is awaited measuring on gauge head (3) and the fuel assembly (8) that awaits measuring, every gauge head (3) all include to corresponding laser generator (31) and the collection projection of the face that awaits measuring of the position throw laser have laser picture collector (32) of the image of the face that awaits measuring, all laser generator (31) with picture collector (32) all are connected with controller (4).
2. The fuel assembly on-line measuring device of claim 1, further comprising a ground height adjusting block (5) installed on the ground at the measuring station, wherein the fixing base (1) is detachably installed on the ground height adjusting block (5), and the ground height adjusting block (5) makes the axis of the clamping rod (2) perpendicular to the horizontal plane.
3. The fuel assembly on-line measuring device of claim 1, characterized in that the clamping rod (2) is mounted on the fixed base (1) through a connecting rod (6), and both ends of the connecting rod (6) are detachably connected with the fixed base (1) and the clamping rod (2), respectively.
4. The fuel assembly on-line measuring device according to claim 1, characterized in that the measuring head (3) is mounted on the clamping rod (2) by means of a fixing ring (7).
5. The fuel assembly on-line measuring device according to claim 1, characterized in that the single measuring head (3) comprises a plurality of laser generators (31) arranged in parallel.
6. The fuel assembly on-line measuring device according to claim 1, characterized in that the single measuring head (3) is an integral part integrally packaged with the laser generator (31) and the picture collector (32).
7. The fuel assembly on-line measuring device according to claim 1, wherein the single measuring head (3) is a separate member in which the laser generator (31) and the picture collector (32) are separately encapsulated.
8. A fuel assembly on-line measuring method, characterized in that the fuel assembly on-line measuring device according to any one of claims 1 to 7 is adopted, and the method sequentially comprises the following steps:
step S1, installing and fixing the fixed base (1) at a measuring station;
s2, placing a simulated fuel assembly at a specified measurement position for measuring the fuel assembly (8) to be measured, starting the measuring head (3), verifying the relative position relation between the measuring head (3) and the part to be measured on the simulated fuel assembly, closing the measuring head (3) and removing the simulated fuel assembly after verification is finished;
step S3, placing a calibration fuel assembly at the specified measurement position, starting the measuring head (3), calibrating the parameters of the measuring head (3), closing the measuring head (3) after calibration is finished, and removing the calibration fuel assembly;
s4, enabling a fuel assembly (8) to be measured to pass through the specified measurement position, starting the measuring head (3) when the fuel assembly (8) to be measured reaches the specified measurement position, projecting laser to a surface to be measured of a part to be measured on the fuel assembly (8) to be measured by the laser generator (31), collecting an image of the surface to be measured on which the laser is projected by the picture collector (32), and transmitting the collected image to the controller (4), processing and analyzing the working data of the measuring head (3) by the controller (4) to obtain a measurement result, and closing the measuring head (3) after the measurement is finished;
and S5, repeating the step S4, and sequentially measuring a plurality of groups of fuel assemblies (8) to be measured.
9. The fuel assembly on-line measuring method according to claim 8, wherein in the step S1, a ground height adjusting block (5) is installed on the ground at the measuring station, and then the fixing base (1) is installed and fixed on the ground height adjusting block (5), and the ground height adjusting block (5) makes the axis of the clamping rod (2) perpendicular to the horizontal plane.
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