Nuclear power station equipment vibration measurement and analysis system

Abstract

The utility model relates to the technical field of industrial vibration detection, in particular to a nuclear power station equipment vibration measurement and analysis system which comprises an instrument support, a remote vibration meter, a vibration sensor, a vibration analysis device, a multi-degree-of-freedom angle adjusting device and a remote observation assembly. The remote vibration meter is arranged on the instrument bracket; the vibration sensor is arranged on the remote vibration meter; the vibration analysis device is electrically connected with the remote vibration meter and the vibration sensor; the multi-degree-of-freedom angle adjusting device is connected with the remote vibration meter and the instrument bracket; the remote observation assembly is arranged on the remote vibration meter, and the remote observation assembly is used for observing a target object measured by the remote vibration meter; the nuclear power station equipment vibration measurement and analysis system provided by the utility model can remotely measure and analyze the vibration of the equipment, can inhibit the interference of environmental vibration, and improves the safety, the measurement efficiency and the measurement precision during measurement.

Description

Technical Field

[0001] This utility model relates to the field of industrial vibration detection technology, specifically to a vibration measurement and analysis system for nuclear power plant equipment. Background Technology

[0002] Nuclear power plant systems have numerous equipment and various steam and water pipelines. The operation of the equipment causes vibrations in the connected pipelines. Excessive vibration may lead to pipeline fatigue, breakage, or cracks, threatening the safe operation of the unit and the safety of personnel. Therefore, it is necessary to conduct vibration monitoring on these pipelines or equipment regularly.

[0003] Conventional pipeline vibration measurement requires the installation of vibration sensors on the pipeline. Due to the complex layout of equipment in nuclear power plants, many pipelines or equipment have poor accessibility, requiring temporary scaffolding to ensure accessibility. In addition, there are a large number of high-temperature pipelines, making direct contact measurement difficult. This inevitably increases the workload and operating costs. Furthermore, erecting scaffolding around operating equipment and pipelines poses a high risk of personnel safety and accidental damage to equipment. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a nuclear power plant equipment vibration measurement and analysis system that can remotely measure and analyze the vibration of equipment or pipelines. This nuclear power plant equipment vibration measurement and analysis system can suppress environmental vibration interference and improve the safety, efficiency and accuracy of measurement.

[0005] To achieve the above and other related objectives, this utility model provides a vibration measurement and analysis system for nuclear power plant equipment, comprising:

[0006] Instrument stand;

[0007] A remote vibration meter, wherein the remote vibration meter is mounted on the instrument bracket;

[0008] Vibration sensor, installed on the remote vibration meter;

[0009] The vibration analysis device is electrically connected to the remote vibration meter and the vibration sensor.

[0010] A multi-degree-of-freedom angle adjustment device is connected to the remote vibration meter and the instrument bracket;

[0011] A remote observation component is installed on the remote vibration meter, and the remote observation component is used to observe the target object being measured by the remote vibration meter.

[0012] In one embodiment of this utility model, the remote observation component includes a controller, a camera, and a display device;

[0013] The camera is mounted on the remote vibration meter and faces the same direction as the remote vibration meter. The camera, display device, and / or multi-degree-of-freedom angle adjustment device are all electrically connected to the controller.

[0014] In one embodiment of this utility model, a fine-tuning mechanism is further included, which connects the instrument support and the multi-degree-of-freedom angle adjustment device to make the angle and / or position between the fine-tuning mechanism and the instrument support adjustable;

[0015] Alternatively, the fine-tuning mechanism can be connected to the multi-degree-of-freedom angle adjustment device and the remote vibration meter, so that the angle and / or position between the remote vibration meter and the fine-tuning mechanism can be adjusted.

[0016] In one embodiment of this utility model, the vibration sensor is a velocity sensor or a vibration acceleration sensor.

[0017] In one embodiment of the present invention, the nuclear power plant equipment vibration measurement and analysis system further includes a vibration damping device, which is disposed at the bottom of the instrument bracket or connected to the instrument bracket and the fine-tuning mechanism.

[0018] In one embodiment of this utility model, the nuclear power plant equipment vibration measurement and analysis system further includes a shell, a temperature control device for controlling the temperature inside the shell, and a temperature sensor for detecting the temperature inside the shell.

[0019] At least one of the remote vibration meter, vibration sensor, and vibration analysis device is housed in the housing, and the temperature control device and temperature sensor are electrically connected to the controller.

[0020] In one embodiment of this utility model, the remote vibration meter is equipped with a standard vibration source, which is used to generate a vibration signal with a preset frequency / amplitude.

[0021] In one embodiment of this utility model, a metal target is also included, which is disposed on the target object measured by the remote vibration meter.

[0022] In one embodiment of this utility model, the vibration sensor is threadedly connected to the remote vibration meter.

[0023] In one embodiment of this utility model, the instrument support is a triangular adjustable instrument support.

[0024] In one embodiment of this utility model, the fine-tuning mechanism is one of a ball-joint multi-degree-of-freedom fine-tuning mechanism, a parallelogram multi-degree-of-freedom fine-tuning mechanism, or a six-degree-of-freedom parallel platform.

[0025] In one embodiment of this utility model, at least one of the remote vibration meter and vibration sensor is provided.

[0026] In summary, this invention, through non-contact remote measurement, avoids the shortcomings of traditional contact sensors, such as difficulty in installation and easy failure in high-temperature (e.g., above 70°C) and high-risk pipelines, significantly improving system reliability. By simultaneously acquiring the vibration signal of the target object and the vibration signal of the remote vibration meter itself, it reduces or eliminates environmental vibration noise components, solving the signal distortion problem caused by the vibration of the remote vibration meter itself. Alternatively, while ensuring that the data measured by the remote vibration meter itself, i.e., the vibration acceleration sensor, is as small as possible, envelope-based measurement analysis is used to more accurately measure the true vibration of the target object, such as the pipeline, and then conduct vibration analysis and evaluation. This solution eliminates the need for scaffolding in traditional surveying, reducing safety risks and overall maintenance costs associated with high-altitude operations, and shortening preparation time for each measurement. Through a dual-sensor collaborative mechanism, it extracts the vibration characteristics of real pipelines or equipment, improving measurement accuracy. The remote observation component allows for convenient and clear observation of the vicinity of the target object, facilitating the adjustment of the remote vibration meter to align with distant targets via multi-angle adjustment devices, thereby improving vibration measurement efficiency. The nuclear power plant equipment vibration measurement and analysis system provides a safe and efficient equipment health management solution for high-temperature and high-risk scenarios such as nuclear power plants and thermal power plants, significantly improving the operational safety and maintenance efficiency of industrial equipment. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a nuclear power plant equipment vibration measurement and analysis system according to one embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of a nuclear power plant equipment vibration measurement and analysis system according to another embodiment of the present invention (Note: The specific structure of this system can be formed by connecting multiple existing components).

[0030] Component labeling description: Target object 10, Remote vibration meter 1, Vibration sensor 2, Vibration analysis device 3, Instrument stand 4, Fine adjustment mechanism 5, Controller 6, Multi-degree-of-freedom angle adjustment device 7, Camera 8, Vibration damping device 9. Detailed Implementation

[0031] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0032] Please see Figures 1 to 2 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0033] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, devices, and materials similar to or equivalent to those described, used, or made of materials in the embodiments of this invention.

[0034] Please see Figure 1 Alternatively, this utility model provides a vibration measurement and analysis system for nuclear power plant equipment, including a remote vibration meter 1, a vibration sensor 2, and a vibration analysis device 3; the remote vibration meter 1 is used to perform non-contact vibration measurement on a target object 10, such as a pipe or equipment, and generate a first vibration signal;

[0035] The vibration sensor 2 is installed on the remote vibration meter 1 and is fixed to the housing of the remote vibration meter 1 by a rigid connection structure such as screws or bolts. It is used to detect the vibration of the remote vibration meter 1 and generate a second vibration signal. The vibration analysis device 3 is connected to the remote vibration meter 1 and the vibration sensor 2 by data or electricity. The vibration analysis device 3 synchronously collects the first vibration signal of the remote vibration meter 1 and the second vibration signal of the vibration sensor 2.

[0036] The vibration analysis device 3 is configured to eliminate the second vibration signal or vibration data of the remote vibration meter 1 from the first vibration signal or vibration data measured by the remote vibration meter 1, so as to obtain the true third vibration signal or vibration data of the target pipe or equipment surface. For example, in some optional embodiments, the vibration analysis device 3 includes a signal synchronization unit (e.g., an FPGA-based synchronization acquisition card or an ADI AD7606B digital data acquisition system), a frequency domain analysis unit (e.g., an ADI ADSP-21489 digital signal processor), a coherence calculation unit (e.g., a Xilinx Kintex-7 field-programmable gate array), a signal compensation unit (e.g., a TI OPA2188 operational amplifier), and an output unit (e.g., a multi-function data output card or an industrial communication module). The signal synchronization unit is used to receive and synchronize the first vibration signal and the second vibration signal. The frequency domain analysis unit is configured to perform Fourier transform on the first vibration signal and the second vibration signal to extract frequency domain features. The coherence calculation unit is used to calculate the coherence function of the first vibration signal and the second vibration signal in the frequency domain. The signal compensation unit is configured to correct the first vibration signal based on the coherence function to eliminate environmental vibration components. The output unit is used to output the corrected target vibration data. The vibration analysis device 3 can be connected to devices such as computers and mobile phones via wired or wireless connections.

[0037] It should be noted that the remote vibration meter 1 is a vibration meter that meets the requirements of this application, such as a laser vibration meter, ultrasonic vibration meter, or microwave vibration meter. The laser vibration meter, based on the laser Doppler effect and laser interferometry, does not require direct contact with the object being measured, thus avoiding the influence of mass loading on the measurement results. It can accurately measure minute vibrations and obtain parameters such as the object's vibration velocity, amplitude, frequency, and acceleration. The laser beam of the laser vibration meter can be transmitted over long distances, enabling vibration monitoring of large structures or inaccessible objects at long distances. The ultrasonic vibration meter utilizes the propagation characteristics of ultrasound in a medium. When ultrasound is emitted to the surface of the object being measured, some of it is reflected back. By measuring the time difference and frequency change between the emitted and reflected waves, it calculates... Microwave vibration meters measure parameters such as vibration displacement and velocity of the object being measured. Based on the Doppler effect of microwaves, when microwaves irradiate a vibrating object, the frequency of the reflected microwaves changes. By detecting this frequency change, the vibration velocity and displacement of the object are measured. Microwave vibration meters have non-contact, long-distance measurement capabilities, are highly adaptable to the environment, and can operate in harsh weather and complex environments. They offer fast measurement speeds and can acquire vibration data in real time. Specific models of vibration meters include the PDV-100 laser vibration meter, Polytec RSV-150 ultra-long-distance laser vibration meter, V100 laser vibration meter, 3D scanning PSV-500-3D laser vibration meter, ASAS860 ultrasonic vibration meter, and JY-J200 ultrasonic amplitude meter.

[0038] The vibration sensor 2 is a vibration velocity sensor, vibration acceleration sensor, piezoelectric sensor, etc.; for example, the vibration sensor 2 is a triaxial accelerometer, in which one sensitive axis is parallel to the optical path axis of the remote vibration meter 1, and its installation position is located in the centroid projection area of ​​the housing of the remote vibration meter 1. Vibration accelerometers can monitor the vibration acceleration of objects in real time, acquiring parameters such as vibration frequency, amplitude, and phase, thereby comprehensively understanding the vibration status of objects and determining whether equipment is operating smoothly or whether there is abnormal vibration. Vibration velocity sensors are inertial sensors that use the principle of magneto-electric induction to convert vibration signals into voltage signals. The voltage value is proportional to the vibration velocity value. In this case, it mainly measures the vibration velocity of the remote vibration meter 1. The vibration velocity sensor converts the vibration signal into a voltage signal output, providing accurate vibration data for the control system. Piezoelectric sensors use piezoelectric materials as the core. When subjected to vibration, the piezoelectric material generates an electric charge. The magnitude of the charge is measured to reflect parameters such as the intensity of the vibration. Specific vibration sensor models 2 include, for example, B&KJ10523 vibration accelerometer, 8011LF-01-500 vibration accelerometer, CA-YD-181 vibration accelerometer, MLV-8 vibration velocity sensor, Debao Sensing VS-2 vibration velocity sensor, PCB356A01 triaxial accelerometer, etc.

[0039] The vibration analysis device 3 is, for example, an oscilloscope + spectrum analyzer, a data acquisition system + analysis software, or a multi-channel vibration analyzer, etc., that can realize the solution of this case. In the oscilloscope + spectrum analyzer, the oscilloscope can observe the time-domain waveform of the vibration signal, and the spectrum analyzer is used to analyze the frequency components of the signal. The combination of the two can perform basic measurement and analysis of the vibration signal. The data acquisition system + analysis software consists of a data acquisition card and matching data analysis software. The data acquisition card is responsible for acquiring the signals from the remote vibration meter 1 and the vibration sensor 2, and the analysis software realizes the analysis and processing of the signals, such as a data acquisition card from NI paired with LabVIEW software. The multi-channel vibration analyzer typically has at least two of the following functions: First, multi-channel data acquisition, which can simultaneously receive signals from multiple remote vibration meters 1 and vibration sensors 2, enabling synchronous acquisition of vibration data from multiple measurement points. For example, the VIBXPERT II vibration analyzer has two analog channels for acquiring signals such as voltage and current. Second, signal analysis and processing, which can perform various analyses on the acquired vibration signals, such as time-domain analysis, displaying vibration waveforms, amplitudes, peak values, and other parameters; frequency-domain analysis, obtaining the vibration spectrum through algorithms such as Fast Fourier Transform (FFT) to determine the frequency components of the vibration; and cepstral analysis and envelope analysis to help extract characteristic information from the vibration signal. Third, parameter measurement and calculation, which can measure and calculate various vibration-related parameters, such as vibration velocity, acceleration, displacement, frequency, phase, and damping ratio. Fourth, fault diagnosis, which, based on the analysis results and preset fault models or thresholds, assesses the operating status of the equipment and diagnoses faults, identifying common problems such as imbalance, misalignment, looseness, gear failure, and bearing failure. II. It can analyze various common faults of rotating machinery; it has data storage and recording functions, with a large capacity for data storage, which can store the collected vibration data and analysis results for subsequent query, comparison and in-depth analysis. Each channel of the CD series equipment has a built-in high-speed distributed storage array, and each channel is independently equipped with a 64G solid-state drive; Fifth, it has real-time display and monitoring functions, which can display the waveform, spectrum and other analysis results of vibration signals in real time, so that operators can understand the vibration status of the equipment at any time. For example, the CD series can display the current value and real-time curve in real time; Sixth, it has communication and transmission functions, supporting multiple communication interfaces, such as Ethernet, USB, Bluetooth, etc., which can communicate with computers, PLCs and other devices to realize remote data transmission and sharing, which is convenient for remote monitoring and management; Seventh, it has triggering and synchronization functions, which can set trigger conditions. When the vibration signal meets the trigger conditions, it will automatically start collecting and analyzing data. It can also realize synchronous acquisition between multiple channels to ensure the time consistency of data in each channel. The CD series has multiple triggering functions such as software triggering, internal triggering, external triggering and positive and negative delay.Common multichannel vibration analyzer models include the VIBXPERT II multichannel vibration analyzer, the 3053-b-120 multichannel vibration analyzer, the CD series ultra-dynamic signal test and analyzer, the B&K3050-B-120 multichannel vibration analyzer, and the VbBalancer dynamic balance vibration analyzer.

[0040] The nuclear power plant equipment vibration measurement and analysis system provided in this case achieves high-precision vibration monitoring in complex industrial scenarios through a dual-sensor collaborative mechanism. It connects a vibration sensor 2 (such as a triaxial accelerometer) to a remote vibration meter 1 (such as a laser vibration meter), and uses a vibration analysis device 3 to simultaneously collect the apparent vibration signal of the target pipeline or equipment and the vibration signal of the vibration meter itself. Based on frequency domain coherence analysis or adaptive filtering algorithms, it eliminates environmental vibration noise components and extracts the actual vibration characteristics of the pipeline or equipment. Alternatively, by minimizing the data measured by the remote vibration meter 1 itself (i.e., the vibration accelerometer), envelope-based measurement analysis can more accurately measure the actual vibration of the target object, such as a pipeline, and then perform vibration analysis and evaluation. This solves the following problems: First, traditional contact sensors suffer from installation difficulties and susceptibility to failure in high-temperature (>200℃) and high-risk pipelines. Second, laser vibrometers suffer from signal distortion due to body vibration in vibrating environments (signal-to-noise ratio decrease >40%). Third, traditional measurements require scaffolding, which poses safety risks and increases costs. The nuclear power plant equipment vibration measurement and analysis system in this case achieves non-contact remote measurement, avoids the risks of high-temperature contact, reduces preparation time for single measurements, eliminates high-altitude operations, and significantly reduces industrial safety accident rates, lowers overall operation and maintenance costs, and improves measurement accuracy. This case overcomes the long-standing problem of environmental interference suppression in the field of vibration monitoring, providing a safe and efficient equipment health management solution for nuclear power plants, thermal power plants, and other scenarios.

[0041] Please see Figure 2 As one of the optional embodiments of this case, the nuclear power plant equipment vibration measurement and analysis system further includes a multi-degree-of-freedom angle adjustment device 7 and a remote observation component;

[0042] The multi-degree-of-freedom angle adjustment device 7 is connected to the remote vibration meter 1 and the instrument bracket 4; the remote observation component is set on the remote vibration meter 1, and the remote observation component is used to observe the target object 10 measured by the remote vibration meter.

[0043] It should be noted that the multi-degree-of-freedom angle adjustment device 7 connects the remote vibration meter 1 and the instrument bracket 4, enabling multi-angle and / or coarse position adjustments of the remote vibration meter 1. For example, the multi-degree-of-freedom angle adjustment device 7 can be driven by a high-precision stepper motor, combined with a gear transmission mechanism, to achieve an adjustment range of ±90° or 360° without dead angles in both horizontal and vertical directions. It can be adjusted manually or via commands sent by the controller 6. The multi-degree-of-freedom angle adjustment device 7 can quickly respond and adjust to the preset angle, ensuring the alignment accuracy of the vibration meter. The multi-degree-of-freedom angle adjustment device 7 can be, for example, a hinge adjustment mechanism, a ball joint multi-degree-of-freedom adjustment mechanism, a parallelogram multi-degree-of-freedom adjustment mechanism, a six-degree-of-freedom parallel platform or a flexible hinge multi-degree-of-freedom adjustment mechanism, a PT-GD312 high-precision electric angle stage, an R3G58C coarse and fine adjustment three-dimensional angle adjustment stage, a six-dimensional adjustment frame, etc. For example, the multi-degree-of-freedom angle adjustment device 7 uses a two-phase stepper motor to drive a worm gear mechanism, and is equipped with a planetary gear set to achieve ±90° horizontal adjustment, and a T-shaped lead screw slide is configured for vertical operation. It should be understood that after the angle of the multi-degree-of-freedom angle adjustment device 7 is adjusted, it can be locked by a locking mechanism. The locking mechanism can be set as a manual locking mechanism or a remote electric locking mechanism according to actual needs, such as a mechanical locking mechanism, which uses thread engagement to generate friction to fix the component, or a cam rotation to press the component, such as a clamp. The remote observation component is used to observe the target object 10 being measured by the remote vibration meter 1, and to magnify the field of view of the surrounding environment of the observed target object 10, thereby making it easier for the remote vibration meter 1 to be aligned with the target object 10 to be measured, thereby improving the measurement efficiency. The remote observation component is, for example, a telescope.

[0044] Please see Figure 2 As one of the optional embodiments in this case, the remote observation component includes a controller 6, a camera 8, and a display device;

[0045] The camera 8 is mounted on the remote vibration meter 1 and faces the same direction as the remote vibration meter 1. The camera 8, the display device such as the display screen and / or the multi-degree-of-freedom angle adjustment device 7 are all electrically connected to the controller 6.

[0046] It should be noted that in existing nuclear power plant equipment vibration measurement and analysis systems, the alignment accuracy and efficiency of the remote vibration meter 1 are relatively low, typically relying on manual adjustment, making it difficult to achieve rapid and accurate multi-angle positioning. Furthermore, traditional systems cannot provide real-time feedback on the alignment status of the vibration meter, resulting in low measurement efficiency and poor applicability in complex environments.

[0047] In this case, camera 8 is installed near the remote vibration meter 1. Camera 8 collects external scene information in real time. Camera 8 uses a high-resolution industrial-grade camera with imaging capabilities under low light conditions, and can clearly capture the relative position of the remote vibration meter 1 and the target object 10. Controller 6 receives the image information transmitted by camera 8. The display device is used to display the image collected by camera 8 and the alignment status of remote vibration meter 1 in real time. The controller 6 can determine the alignment position of the vibration meter through the built-in image recognition algorithm. When a deviation is detected, controller 6 will automatically calculate the adjustment angle and send a command to the multi-degree-of-freedom angle adjustment device 7 to coarsely adjust the angle / or position of remote vibration meter 1. Subsequently, controller 6 controls the fine-tuning mechanism 5 to finely adjust the angle / or position of remote vibration meter 1, thereby achieving fast and accurate alignment. Alternatively, users can manually adjust the process by watching the real-time image collected by camera 8 and the alignment status of remote vibration meter 1 on the display device, or by a combination of automatic and manual control by controller 6, which improves the flexibility and reliability of the system. The controller 6 can be selected from NI cRIO-9039, Siemens IPC227E industrial computer, Beckhoff CX9020 embedded controller or other controllers that meet the usage requirements; the camera 8 can be selected from FLIRA700, OptrisPI640, XenicsGobi640 or other cameras that meet the usage requirements.

[0048] Through the coordinated operation of the camera 8 and the controller 6, this invention enables the system to achieve high-precision alignment accuracy, such as sub-millimeter level, which is significantly better than traditional manual adjustment methods. The rapid response capability of the multi-degree-of-freedom angle adjustment device 7 allows the remote vibration meter 1 to complete coarse and / or fine adjustments of multiple angles in a short time, significantly improving measurement efficiency. Through the low-light imaging capability of the camera 8 and the intelligent recognition algorithm of the controller 6 or remote human control, the system can operate stably in complex environments. This reduces or eliminates manual intervention, lowering the labor intensity of operators and the requirements for professional skills.

[0049] Please see Figure 2 As one optional embodiment of this case, the nuclear power plant equipment vibration measurement and analysis system further includes an instrument support 4. It should be noted that the instrument support 4 can be, for example, a carbon fiber instrument support.

[0050] Please see Figure 2 As one of the optional embodiments of this case, it also includes a fine-tuning mechanism 5, which connects the instrument support 4 and the multi-degree-of-freedom angle adjustment device 7, so that the angle and / or position between the fine-tuning mechanism 5 and the instrument support 4 are adjustable;

[0051] Alternatively, the fine-tuning mechanism 5 can be connected to the multi-degree-of-freedom angle adjustment device 7 and the remote vibration meter 1, so that the angle and / or position between the remote vibration meter 1 and the fine-tuning mechanism 5 can be adjusted.

[0052] It should be noted that the fine-tuning mechanism 5 can be, for example, a six-degree-of-freedom fine-tuning platform. The fine-tuning mechanism 5 is installed on the top of the multi-degree-of-freedom angle adjustment device 7 or the top of the instrument bracket 4 via a quick-release interface. For example, the remote vibration meter 1 is fixed to the fine-tuning mechanism 5 by screws or welding. When the object of vibration measurement in the nuclear power plant equipment vibration measurement and analysis system is far away, such as measuring the vibration parameters of a thin tube with a diameter of a few centimeters that is more than ten meters away, it is difficult to manually align the remote vibration meter 1 with the tube because even a slight deviation in angle will prevent alignment. Therefore, the fine-tuning mechanism 5 is needed to fine-tune the position and / or angle of the remote vibration meter 1 to achieve the measurement of the vibration parameters of the tube by the remote vibration meter 1. The fine-tuning mechanism 5 includes, for example, a hinge fine-tuning mechanism, a ball-joint multi-degree-of-freedom fine-tuning mechanism, a parallelogram multi-degree-of-freedom fine-tuning mechanism, a six-degree-of-freedom parallel platform, or a flexible hinge multi-degree-of-freedom fine-tuning mechanism. The ball-joint multi-degree-of-freedom fine-tuning mechanism includes a ball head, a ball socket, an adjusting bolt, and a locking device. The ball head and ball socket cooperate to achieve rotational freedom in multiple directions. By setting adjusting bolts in different directions, rotating the adjusting bolts can push the ball head to move within the ball socket, thereby precisely adjusting the position and angle of the component connected to the ball head. The locking device is used to fix the relative position of the ball head and ball socket after fine-tuning. The ball-joint multi-degree-of-freedom fine-tuning mechanism has a compact structure, can achieve fine-tuning in multiple directions, and can adapt to complex spatial attitude adjustment needs. The parallelogram multi-degree-of-freedom fine-tuning mechanism is usually composed of multiple parallelogram linkage mechanisms. The linkages are connected through connection points and revolute joints. It is generally equipped with drive elements, such as motors or manual knobs, to drive the movement of the linkages. Some mechanisms also have displacement sensors and feedback control systems to achieve precise fine-tuning control. The six-degree-of-freedom parallel platform includes an upper platform, a lower platform, and six telescopic rods. The upper platform is used to mount equipment such as a remote vibration meter 1 that requires fine-tuning. The lower platform is fixed to an instrument bracket 4, a foundation structure, or a multi-degree-of-freedom angle adjustment device 7. The two ends of the six telescopic rods are connected to the upper and lower platforms respectively via ball joints. By controlling the length of the telescopic rods, the upper platform can be fine-tuned in space in six degrees of freedom, namely three translational degrees of freedom and three rotational degrees of freedom. Common fine-tuning mechanism models 5 include the PT-GD630 six-degree-of-freedom parallel platform, the P76F.Z80S / K60-C flexible hinge multi-degree-of-freedom fine-tuning mechanism, the HFV01-A35 hinge fine-tuning mechanism, and the HFV01-A47 hinge fine-tuning mechanism.

[0053] Please see Figure 2As one of the optional embodiments of this case, the angle and / or position between the remote vibration meter 1 and the fine-tuning mechanism 5 is adjustable, or the angle and / or position between the fine-tuning mechanism 5 and the instrument support 4 is adjustable.

[0054] It should be noted that the angle and / or position between the remote vibration meter 1 and the fine-tuning mechanism 5 are adjustable, or the angle and / or position between the fine-tuning mechanism 5 and the instrument support 4 are adjustable. This can be achieved through methods such as gear and rack structures, universal joints, worm gear structures, parallelogram linkage mechanisms, hinges, and adjusting bolts. For example, a spiral fine-tuning screw can be installed at the connection between the remote vibration meter 1 and the fine-tuning mechanism 5. By rotating the screw and utilizing the transmission principle of the thread, the remote vibration meter 1 can make slight positional movements or angle adjustments within a certain range. For example, a worm gear can be installed on the instrument support 4, and a worm can be connected to the fine-tuning mechanism 5. When the worm is rotated, the worm gear will rotate accordingly, thereby driving the fine-tuning mechanism 5 to rotate around the axis of the worm gear, thus achieving angle adjustment.

[0055] As an optional embodiment of this case, the remote vibration meter 1 is equipped with a remote searchlight. The direction of the remote searchlight is the same as the direction of vibration measurement of the remote vibration meter 1. This allows the user to easily observe whether the remote vibration meter 1 is aligned with the target object 10 even in dim or dark conditions. Furthermore, the remote searchlight moves along with the adjustment direction of the remote vibration meter 1, thus eliminating the need for additional personnel for lighting and reducing staffing requirements. It should be understood that the remote searchlight can be built into the housing of the remote vibration meter 1. Its beam is output coaxially with the laser vibration measurement optical path through a beam splitter, and the illumination angle is synchronously adjusted by a stepper motor driving a reflector to ensure that the light spot and the measurement point are completely coincident in dark environments.

[0056] As an optional embodiment of this case, it also includes a metal target set on the surface of the target object 10. The target has a cross laser guide groove at its center, so that the laser beam of the remote vibration meter 1 can be reflected back to the camera 8 through the target to assist in automatic alignment. The metal target is generally made of a material with high reflectivity. Through the control of the controller 6 on the multi-degree-of-freedom adjustment device 7, the remote vibration meter 1 can be automatically aligned, thereby reducing manual intervention and improving alignment accuracy.

[0057] As an optional embodiment of this case, the vibration sensor 2 is a vibration velocity sensor or a vibration acceleration sensor. Velocity sensors are generally larger in size, while vibration acceleration sensors are generally smaller in size and easier to install. The specific choice can be made according to actual needs.

[0058] As an optional embodiment of this case, the remote vibration meter 1 is equipped with a standard vibration source, which is used to generate a vibration signal with a preset frequency / amplitude.

[0059] It should be noted that the standard vibration source is, for example, a piezoelectric ceramic vibrator. In this case, vibration signals with known frequency / amplitude are generated periodically, and the sensitivity of the vibration sensor 2 is manually or automatically calibrated by comparing the measured values, so as to avoid the attenuation of accuracy after long-term use.

[0060] Please see Figure 2 As an optional embodiment of this case, the nuclear power plant equipment vibration measurement and analysis system further includes a vibration damping device 9, which is disposed at the bottom of the instrument support 4 or connected to the instrument support 4 and the fine-tuning mechanism 5 or the multi-degree-of-freedom angle adjustment device 7.

[0061] It should be noted that the vibration damping device 9 is mainly used to reduce or eliminate the impact of vibration on the vibration measurement and analysis system of nuclear power plant equipment, such as the remote vibration meter 1, improve measurement accuracy and stability, and ensure that the vibration measurement and analysis system of nuclear power plant equipment is not disturbed by external vibration during vibration detection, thereby ensuring the accuracy and reliability of the data. Regarding specific vibration damping devices 9, examples include small precision instrument vibration dampers, which use damping technology to absorb and dissipate vibration energy and are suitable for equipment requiring a stable environment; rubber vibration damping pads, which achieve vibration damping through elastic deformation; and air-floating vibration damping tables, which achieve non-contact support based on the principle of air static pressure, have high vibration damping performance and stability, and are suitable for high-precision measurement scenarios.

[0062] Please see Figure 2 As an optional embodiment of this case, the vibration damping device 9 includes an air-bearing vibration damping base (used to isolate low-frequency vibration) disposed at the bottom of the instrument bracket 4, and a magnetorheological damper (to suppress high-frequency jitter) disposed at the connection of the multi-degree-of-freedom angle adjustment device 7 or the fine-tuning mechanism 5, thereby forming a two-stage vibration damping system to improve the isolation effect of vibrations in different frequency bands.

[0063] As an optional embodiment of this case, the nuclear power plant equipment vibration measurement and analysis system further includes an outer shell, a temperature control device for controlling the temperature inside the outer shell, and a temperature sensor for detecting the temperature inside the outer shell; at least one of the remote vibration meter 1, vibration sensor 2, and vibration analysis device 3 is housed in the outer shell, and the temperature control device and temperature sensor are electrically connected to the controller 6.

[0064] It should be noted that the outer casing can also accommodate devices such as the controller 6 and the camera 8, which can be configured according to actual needs; it should be understood that the measuring head such as the laser or microwave emitted by the remote vibration meter 1 and the part of the forward field of view captured by the camera 8 should be exposed outside the outer casing to avoid structural interference or obstruction.

[0065] In existing technologies, the measurement accuracy or control adjustment accuracy of nuclear power plant equipment vibration measurement and analysis systems are affected by environmental factors such as temperature, such as the impact of ambient temperature fluctuations on the working stability of precision measuring components. Therefore, in this case, by setting up an enclosure and configuring a temperature control device on the enclosure and a temperature sensor inside the enclosure, the temperature sensor detects the temperature inside the enclosure and transmits the signal to the controller 6. When the temperature inside the enclosure is not suitable for the working environment of the remote vibration meter 1, vibration sensor 2, vibration analysis device 3, controller 6, camera 8, etc. inside the enclosure, the controller 6 can control the temperature control device to adjust the temperature inside the enclosure to room temperature or a uniform temperature suitable for the operation of each device, thereby avoiding or reducing the impact of temperature on the nuclear power plant equipment vibration measurement and analysis system. At the same time, the enclosure also has the functions of dustproofing, windproofing, and corrosion protection against environmental factors. The temperature sensor selection includes, for example, the DS18B20 stabilized sensor, which allows up to 100 sensors to be connected in parallel, suitable for distributed temperature measurement; or the MAX31850 temperature sensor, which is a 3×3mm QFN packaged sensor that supports K / J / T type thermocouples, has built-in cold junction compensation, and an accuracy of ±0.5℃; the temperature control device selection includes, for example, a semiconductor refrigeration module, a compact PTC heating system, and a miniature liquid circulation temperature control unit; specific models include Ferrotec 9500 / 127 / 060B, Minco HK3406, Lytron 0320, etc.

[0066] As an optional embodiment of this case, the vibration sensor 2 is threadedly connected to the remote vibration meter 1, so as to facilitate the detachable connection between the vibration sensor 2 and the remote vibration meter 1, while ensuring that the vibration sensor 2 accurately detects the vibration parameters of the remote vibration meter 1 itself.

[0067] Please see Figure 2 As an optional embodiment of this case, the instrument support 4 is a triangular adjustable instrument support, a magnetic six-legged parallel support, an air-floating self-balancing support, or a mechanical folding support, etc.

[0068] As an optional embodiment of this case, at least one of the remote vibration meter 1 and vibration sensor 2 is provided. When multiple remote vibration meters 1 and vibration sensors 2 are provided, vibration parameters of the device under test can be collected simultaneously at multiple points.

[0069] The multi-degree-of-freedom angle adjustment device 7 (such as a six-degree-of-freedom parallel platform) in this case first performs a large-range coarse adjustment (±90° horizontal or vertical) on the remote vibration meter 1, and then achieves sub-millimeter fine adjustment through the fine adjustment mechanism 5 (such as a ball joint multi-degree-of-freedom platform), thereby shortening the alignment time and significantly improving the adjustment efficiency, which is especially suitable for complex pipeline layout scenarios in nuclear power plants.

[0070] In this case, the camera 8 collects image data of the target object 10 in real time. The controller 6 determines the position of the target object 10 based on the data collected by the camera 8, and then drives the multi-degree-of-freedom angle adjustment device 7 and the fine-tuning mechanism 5 to complete the rapid alignment. This eliminates the need for manual intervention, reduces operational risks, and can maintain high precision even in harsh environments such as low light and high radiation.

[0071] In manual mode, camera 8 transmits image data of the distant target 10 to a display device (such as a high-resolution industrial screen), showing the relative position of the remote vibration meter 1 and the target 10 in real time. Operators can visually observe the alignment status and make manual adjustments, solving the problem of minute deviations being difficult to detect with the naked eye and enabling observation of the target beyond visual range. Furthermore, the real-time display of the alignment status aids manual adjustment, significantly improving the accuracy of manual adjustments, making it particularly suitable for long-distance measurement scenarios of thin tubes with a diameter less than 5cm. In this case, camera 8 collects the position of target object 10 in real time and displays it on the display device (screen) in conjunction with controller 6, allowing users to monitor the working status and progress of the nuclear power plant equipment vibration measurement and analysis system in real time. At the same time, the position data of target object 10 collected by camera 8 in real time can be called by controller 6 to quickly determine the coordinates of target object 10, thereby improving the efficiency of determining the position of target object 10. Subsequently, controller 6 quickly controls multi-degree-of-freedom angle adjustment device 7 to first perform a large-range coarse adjustment of the angle / position of remote vibration meter 1, and achieves sub-millimeter fine adjustment through fine adjustment mechanism 5, thereby enabling remote vibration meter 1 to quickly align with target object 10, thereby improving the adjustment efficiency of remote vibration meter 1. The coordinated work of controller 6, multi-degree-of-freedom angle adjustment device 7, camera 8 and display device comprehensively improves the vibration measurement efficiency of nuclear power plant equipment vibration measurement and analysis system, and allows users to observe the measurement dynamics in real time.

[0072] In summary, this utility model effectively overcomes some practical problems in the prior art, thus possessing high utilization value and significance. The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit it. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A nuclear power plant equipment vibration measurement analysis system, characterized by, include: Instrument stand; A remote vibration meter, wherein the remote vibration meter is mounted on the instrument bracket; Vibration sensor, installed on the remote vibration meter; The vibration analysis device is electrically connected to the remote vibration meter and the vibration sensor. A multi-degree-of-freedom angle adjustment device is connected to the remote vibration meter and the instrument bracket; A remote observation component is installed on the remote vibration meter, and the remote observation component is used to observe the target object being measured by the remote vibration meter.

2. The nuclear power plant equipment vibration measurement analysis system in accordance with claim 1 characterised in that, The remote observation component includes a controller, a camera, and a display device; The camera is mounted on the remote vibration meter and faces the same direction as the remote vibration meter. The camera, display device, and / or multi-degree-of-freedom angle adjustment device are all electrically connected to the controller.

3. The nuclear power plant equipment vibration measurement analysis system in accordance with claim 1 characterised in that, It also includes a fine-tuning mechanism, which connects the instrument support to the multi-degree-of-freedom angle adjustment device, so that the angle and / or position between the fine-tuning mechanism and the instrument support are adjustable; Alternatively, the fine-tuning mechanism can be connected to the multi-degree-of-freedom angle adjustment device and the remote vibration meter, so that the angle and / or position between the remote vibration meter and the fine-tuning mechanism can be adjusted.

4. The nuclear power plant equipment vibration measurement and analysis system according to claim 1, characterized in that, The vibration sensor is a vibration velocity sensor or a vibration acceleration sensor.

5. The nuclear power plant equipment vibration measurement analysis system in accordance with claim 3, characterized by, The nuclear power plant equipment vibration measurement and analysis system also includes a vibration reduction device, which is located at the bottom of the instrument support or connected to the instrument support and the fine-tuning mechanism.

6. The nuclear power plant equipment vibration measurement analysis system in accordance with claim 1, characterized by, The nuclear power plant equipment vibration measurement and analysis system also includes an outer shell, a temperature control device for controlling the temperature inside the outer shell, and a temperature sensor for detecting the temperature inside the outer shell. At least one of the remote vibration meter, vibration sensor, and vibration analysis device is housed in the housing, and the temperature control device and temperature sensor are electrically connected to the controller.

7. The nuclear power plant equipment vibration measurement analysis system in accordance with claim 1, characterized by, The remote vibration meter is equipped with a standard vibration source, which is used to generate vibration signals with a preset frequency / amplitude.

8. The nuclear power plant equipment vibration measurement and analysis system according to claim 1, characterized in that, It also includes a metal target, which is placed on the target object being measured by the remote vibration meter.

9. The nuclear power plant equipment vibration measurement analysis system in accordance with claim 3, characterized by, The fine-tuning mechanism is one of the following: a ball-joint multi-degree-of-freedom fine-tuning mechanism, a parallelogram multi-degree-of-freedom fine-tuning mechanism, or a six-degree-of-freedom parallel platform.

10. The nuclear power plant equipment vibration measurement analysis system in accordance with claim 1, characterized by, At least one remote vibration meter or vibration sensor is provided.

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