CN110579326A - Vibration detection device and method for multi-rotary-joint space solar power station - Google Patents
Vibration detection device and method for multi-rotary-joint space solar power station Download PDFInfo
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- CN110579326A CN110579326A CN201910910828.3A CN201910910828A CN110579326A CN 110579326 A CN110579326 A CN 110579326A CN 201910910828 A CN201910910828 A CN 201910910828A CN 110579326 A CN110579326 A CN 110579326A
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Abstract
the invention discloses a vibration detection device and a method for a multi-rotary joint space solar power station, which comprises a multi-rotary joint space solar power station structure, a posture fixing suspension structure, a vibration excitation structure and a vibration detection structure; the multi-rotary joint space solar power station is fixed on the attitude fixing suspension frame to keep the space form of the multi-rotary joint space solar power station, the vibration excitation structure comprises two vibration exciters, the two vibration exciters are respectively connected with the multi-rotary joint space solar power station and used for exciting the multi-rotary joint space solar power station to generate vibration, the vibration detection structure comprises three groups of binocular vision units and is used for detecting a solar panel array of the multi-rotary joint space solar power station and mark points on an antenna to obtain vibration information of the structure.
Description
Technical Field
the invention relates to the field of vibration detection and analysis of a space deployable structure, in particular to a vibration detection device and method of a multi-rotary joint space solar power station.
Background
with the continuous increase in human demand for energy and the continuous decrease in fossil energy that the earth can exploit, people are actively seeking clean energy that can be exploited sustainably. Solar energy is used as a main source of earth energy, how to develop and utilize the solar energy is one of the hot researches on the development of clean energy all over the world, and the construction of a solar power station is an ideal and easily realized solar energy utilization mode. However, solar rays can be greatly attenuated when passing through the earth atmosphere, and the earth rotation can cause the earth to have day and night alternation and influence of rainy weather on the rays, so that the problems of low sunlight utilization rate, large fluctuation of generated power and the like can occur when a solar power station is built on the ground.
To solve the above problems, the concept of space solar power station is developed. The sunlight intensity of the space is dozens of times of that of the ground, the power density of the solar power generation panel is greatly improved, and the all-weather stable power generation of the power station can be realized by applying the sun-oriented technology. The space solar power station as a large space development mechanism is susceptible to vibration caused by space particle storm, solar wind, track attitude adjustment and the like during the in-orbit operation, and the research on the large space development structure in the current academic community mainly focuses on the aspect of computer simulation on the structure dynamics, and the vibration analysis research on the whole structure of the large space development structure lacks practical experimental test data.
the structure module that many rotary joint space solar power station is constituteed is more, and the vibration coupling of each partial structure is more complicated, adopts the mode that multiunit binocular vision system detected the vibration to obtain more vibration information than traditional single-point vibration measurement method, and binocular vision system has advantages such as non-contact, easy deployment, vibration information are visual, accomplishes vibration detection under the prerequisite that does not increase extra part for the structure that is surveyed, makes the experimental data that obtains more accurate.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention mainly aims to provide a vibration detection device of a multi-rotary joint space solar power station, and fully considers the vibration difference of a solar panel and a microwave transmitting antenna part in the structure under different attitude angles.
the invention also aims to provide a control method of the vibration detection device of the multi-rotary joint space solar power station.
the invention adopts the following technical scheme:
A vibration detection device of a multi-rotary joint space solar power station comprises a multi-rotary joint space solar power station structure, a posture fixing suspension structure, a vibration excitation structure and a vibration detection structure;
Many rotary joint space solar power station structure includes rectangle skeleton, microwave transmitting antenna and two solar panel arrays that the structure is the same, and two solar panel arrays pass through rotary joint symmetric connection on the rectangle skeleton, the solar panel array includes N solar panel, and every solar panel adopts the mode of middle supporting, and adjacent solar panel adopts rotary joint to connect, and solar panel's the receiving face is 0 degree with the initial angle of horizontal plane, microwave transmitting antenna sets up under the rectangle skeleton
the attitude fixing suspension comprises a plurality of rectangular frames, the top edges of adjacent rectangular frames are connected through an upper cross beam, the bottom edges of adjacent rectangular frames are connected through a lower cross beam, and the multi-rotary joint space solar power station structure is respectively connected with the upper cross beam and the lower cross beam through suspension ropes; the microwave transmitting antenna is fixed on the rectangular frame through a rotary joint, and the computer is connected with the rotary joint through a motor driving plate to change the included angles between the microwave transmitting antenna and the solar panel and the horizontal plane;
The vibration excitation structure comprises a signal generator, a power amplifier, a first vibration exciter and a second vibration exciter, wherein the signal generator is used for amplifying power through the power amplifier to drive the first vibration exciter and the second vibration exciter to generate synchronous vibration, and vibration of the multi-rotary joint space solar power station structure is realized through an output ejector rod;
The vibration detection structure includes: three sets of the same binocular vision units, three sets of the same binocular vision units collect the vibration images of the two solar panel arrays and the microwave transmitting antenna respectively, each binocular vision unit comprises two high-speed cameras, and the two high-speed cameras are connected with a computer.
The rotary joint comprises a conductive slip ring, a mounting end cover plate and a speed reduction stepping motor, and the speed reduction stepping motor is connected with a motor drive plate.
The solar panel array comprises six solar panels, and the upper end and the lower end of each solar panel are provided with rotary joints.
The number of the rectangular frames is four, the distance between every two adjacent rectangular frames is 2000mm, and the ground clearance of the lower cross beam is 100 mm.
Circular mark points are pasted on the surface of the solar panel.
The microwave transmitting antenna is characterized in that the back surface of the microwave transmitting antenna is a round carbon fiber plate, round mark points are adhered to the round carbon fiber plate, the front surface of the microwave transmitting antenna is a working surface, and the working surface is provided with an antenna array formed by a plurality of rectangular antennas.
the binocular vision system further comprises two bidirectional hydraulic cloud platforms, two linear guide rails and a support frame, wherein the linear guide rails are arranged on the support frame, and the two high-speed cameras slide on the linear guide rails through the bidirectional hydraulic cloud platforms respectively.
The number of the suspension ropes is nine, and the suspension ropes are in a tight and vertical state.
the vibration exciter is connected with the rectangular framework.
A method for detecting vibration of a multi-rotary joint space solar power station comprises the following steps:
Starting a computer, controlling each rotary joint to rotate, and enabling each solar panel and each microwave transmitting antenna to rotate to an initial position;
the high-speed camera completes three-dimensional calibration, objects to be detected are all in the field of view of the high-speed camera, and the starting mode of the high-speed camera is set as computer level signal triggering starting;
The signal generator generates signals, the signals are amplified to appropriate voltage through the power amplifier to drive the two vibration exciters to vibrate, the vibration exciters transmit vibration excitation to the multi-rotary joint solar power station through the output ejector rods, the computer sends out a camera starting signal, the three groups of binocular vision systems simultaneously start to work, and structural vibration images are continuously collected according to a set frame rate;
The computer controls the motor in the rotary joint to rotate, changes the included angle between the sunlight receiving surface of the solar panel and the working surface of the microwave transmitting antenna and the horizontal plane, and collects images under different included angles;
And transmitting the image information in the high-speed camera to a computer for carrying out mark point coordinate extraction, contour edge line identification, coordinate conversion and view reconstruction, and finally obtaining the vibration information of the whole multi-rotary joint solar power station structure.
The invention has the beneficial effects that:
(1) The vibration information of the structure is obtained by adopting the method of detecting the mark points on the surface of the measured structure by using the binocular vision system, no additional sensor is needed to be arranged on the measured structure except the mark points, the pasted mark points are uniform and symmetrical and have extremely light weight, and the influence on the original physical characteristics of the measured structure can be almost ignored;
(2) The invention adopts a plurality of groups of binocular vision systems to synchronously detect a plurality of components of the multi-rotary joint space solar power station, thereby solving the problem that the deployment of the sensor is complex and difficult in the vibration test of a large structure;
(3) The attitude of a main structure of the multi-rotary joint space solar power station is suspended and fixed, and the state of the multi-rotary joint space solar power station during on-rail operation is simulated to carry out vibration test on the multi-rotary joint space solar power station; the spatial attitude of a local structure of the solar power station is changed in a mode that a motor drives a rotary joint, so that vibration tests of different on-orbit running states of the multi-rotary joint spatial solar power station are realized;
(4) The multi-rotary joint space solar structure, the vibration exciting mechanism and the vibration detecting mechanism are independently supported by different supports, particularly the vibration testing mechanism and the tested structure are independent from each other and are not connected with each other, the vibration of the tested structure cannot influence the detecting system, and the experimental data acquired by the binocular vision system is more accurate.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a multi-rotary joint space solar power station of the present invention;
fig. 3 is a schematic diagram of the structure of a binocular vision unit of the present invention;
FIG. 4 is a schematic view of a rotary joint;
fig. 5 is a top view of the present invention.
Detailed Description
the present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
Examples
As shown in fig. 1-5, a vibration detection device of a multi-rotary joint space solar power station comprises a multi-rotary joint space solar power station structure 3, an attitude fixing suspension structure 1, a vibration excitation structure and a vibration detection structure;
the multi-rotary joint space solar power station structure comprises a rectangular framework 312, the rectangular framework is formed by assembling a plurality of thin-wall stainless steel pipes and connecting pieces, the rectangular framework is vertically placed, the solar panel arrays are symmetrically connected to the left side and the right side of the middle point of the upper side of the rectangular framework, the two solar panel array structures are identical, the solar panel array in the embodiment is formed by six solar panels 302, the solar panels are supported in the middle, the adjacent solar panels are connected through rotary joints, and the solar panels located at the head and the tail in the array are connected with the rectangular framework through the rotary joints respectively.
The initial angle between the receiving surface of each solar panel and the horizontal plane is 0 degree. In this embodiment, as shown in fig. 2, the rotation joint located at the uppermost end is used as the first rotation joint 301.
The outer surface of each solar panel 302 is provided with a circular mark point, and the material of the mark point is ordinary A4 paper.
the invention also comprises a microwave transmitting antenna, wherein the microwave transmitting antenna is arranged below the middle position of the rectangular framework, and the initial angle between the working surface of the antenna and the horizontal plane is 0 degree. The microwave transmitting antenna is characterized in that the back surface of the microwave transmitting antenna is a round carbon fiber plate, round mark points are adhered to the round carbon fiber plate, the front surface of the microwave transmitting antenna is a working surface, and the working surface is provided with an antenna array formed by a plurality of rectangular antennas.
each rotary joint comprises a conductive slip ring 3301, a mounting end cover plate 3302 and a speed reduction stepping motor 3303, a computer 11 sends out a pulse control signal of the motor, the pulse signal is amplified to a proper voltage through a motor driving plate 12 to drive the speed reduction stepping motor 3304 to rotate, and therefore different working postures of the included angle simulator between the solar panel and the microwave transmitting antenna and the horizontal plane are changed;
The posture fixing suspension comprises four rectangular frames with the height of about 1.5m, six cross beams and nine suspension ropes 2, the four rectangular frames are vertically arranged at equal intervals, the distance between every two adjacent rectangular frames is 2000mm, the top edges of the adjacent rectangular frames are connected through the upper cross beam, the bottom edges of the adjacent rectangular frames are connected through the lower cross beam, the ground clearance of the lower cross beam is 100mm, the nine suspension ropes are distributed in the upper 5 and lower 4 positions, one ends of the suspension ropes are connected to the cross beams, the other ends of the suspension ropes are connected to the multi-rotary joint space solar power station structure, and the ropes are made of low-elasticity steel wire ropes.
in this embodiment, the first rotary joint 301, the fifth rotary joint 304, the rectangular frame upper connecting member 306, the tenth rotary joint 307, and the fourteenth rotary joint 309 are connected to the upper beam of the attitude-fixed suspension 1 by five suspension ropes 2, the multi-rotary-joint space solar power plant structure is connected to the attitude-fixed suspension 1 by using four suspension ropes below the first rotary joint 301, the fifth rotary joint 304, the tenth rotary joint 307, and the fourteenth rotary joint 309, and all the suspension ropes are in a tightened and perpendicular state.
In the embodiment, the microwave transmitting antenna is fixed on the rectangular frame through four rotary joints.
The vibration excitation structure comprises a signal generator 10, a power amplifier 9, a first vibration exciter 7 and a second vibration exciter 8, the vibration exciters are fixed on a supporting platform through mounting bases through bolts, the supporting platform is composed of a plurality of aluminum profiles with the lengths of 270mm and 350mm and a stainless steel plate with the thickness of 5mm, the signal generator 10 generates rectangular or sinusoidal signals with certain frequency, the generated waveform signals are subjected to power amplification through the power amplifier 9 and used for driving the first vibration exciter 7 and the second vibration exciter 8 to generate synchronous vibration, and the vibration exciters transmit vibration excitation to the multi-rotary joint space solar power station structure through output ejector rods to enable the multi-rotary joint space solar power station structure to generate vibration.
the output ejector rods of the two vibration exciters in the embodiment are respectively connected with a fourth connecting piece 303 of the rectangular framework and a ninth connecting piece 309 of the rectangular framework of the multi-rotary joint space solar power station.
-the vibration detection structure comprises: three sets of the same binocular vision units and computers, three sets of binocular vision units include first binocular vision unit 4, second binocular vision unit 5 and third binocular vision unit 6, three sets of the same binocular vision units gather the vibration image of two solar panel arrays and microwave transmitting antenna respectively, each set of binocular vision unit includes two high-speed cameras 401 again, two-way hydraulic pressure cloud platform 402, two sets of linear guide 403 and one by a plurality of length be 2500mm respectively, the vision platform support frame 404 that 1100mm and 470 mm's aluminium alloy is constituteed, the start-up of high-speed camera 401 is controlled with the level signal that closes by computer 11 is unified, the image that the high-speed camera was gathered among the vibration detection process is deposited in the inside memory card of camera earlier, the image is handled in the transmission to the computer after gathering.
In this embodiment, each solar panel is supported by two independent rotary joints, each rotary joint comprises a conductive slip ring 3301, a mounting end cover plate 3302 and a speed reduction stepping motor 3303, the computer 11 sends out a pulse control signal of the motor, and the pulse signal is amplified to a proper voltage through a motor driving plate 12 to drive the speed reduction stepping motor 3304 to rotate, so that different working postures of the simulator of an included angle between the solar panel and a microwave transmitting antenna and a horizontal plane are changed.
the motor in two rotary joint drives a solar panel jointly and rotates in order to change its sunshine and receive the contained angle between face and the horizontal plane, contained angle variation range: and 0-360 degrees, and a plurality of circular marks 310 are adhered on the surface of each solar panel and used for image recognition and model reconstruction in the vibration detection process.
Microwave transmitting antenna 305 back be a circular shape carbon fiber board, the working face is the antenna array of compriseing a plurality of 100 mm's rectangle antenna, the antenna is installed in rectangle skeleton below middle part, realizes by the motor drive in four rotary joint that the antenna rotates around rectangle skeleton sheer pole axis to change the contained angle between antenna working face and the horizontal plane, contained angle variation range: -90 to 90.
the working process of the invention is as follows:
Starting a computer, controlling each rotary joint to rotate, and enabling each solar panel and each microwave transmitting antenna to rotate to an initial position;
Moving a slide block of the linear guide rail to enable the high-speed camera to be in a proper horizontal position, adjusting a hydraulic holder to control the pitching angle of the high-speed camera, enabling the detected solar panel array and the microwave transmitting antenna to be in a camera field of a corresponding binocular vision detection system, completing three-dimensional calibration of each group of binocular vision systems, setting the image acquisition speed of all the high-speed cameras to be a uniform frame rate, and setting the starting mode of the high-speed camera to be triggered and started by a computer horizontal signal;
The signal generator generates a signal with a certain frequency, the signal is amplified to a proper voltage through the power amplifier to drive the two vibration exciters to vibrate, the vibration exciters transmit vibration excitation to the multi-rotary joint solar power station through the output ejector rods, the computer sends out a camera starting signal, the three groups of binocular vision units simultaneously start to work, and vibration images of the structure to be measured are continuously acquired according to a set frame rate;
The computer sends out a motor control signal, the motor control signal is amplified by a motor driving plate and then drives a motor in a rotary joint to rotate, an included angle between a sunlight receiving surface of the solar panel and a working surface of the microwave transmitting antenna and a horizontal plane is changed, and vibration images under different attitude angles are collected;
And transmitting the image information in the high-speed camera to a computer for carrying out mark point coordinate extraction, contour edge line identification, coordinate conversion and view reconstruction, and finally obtaining the vibration information of the whole multi-rotary joint solar power station structure.
The multi-rotary joint space solar power station is fixed on the attitude fixing suspension frame to keep the space form of the multi-rotary joint space solar power station, the vibration excitation structure comprises two vibration exciters, the two vibration exciters are respectively connected with the multi-rotary joint space solar power station and used for exciting the multi-rotary joint space solar power station to generate vibration, and the vibration detection structure comprises three groups of binocular vision units and is used for detecting mark points on a solar panel array and an antenna of the multi-rotary joint space solar power station to obtain vibration information of the structure. The invention adopts a method of suspending and fixing the multi-rotary joint space solar power station, uses a plurality of groups of visual detection systems to respectively and synchronously detect different components of the multi-rotary joint space solar power station, has the advantage of non-contact, does not need to split each component of the structure, and is more beneficial to researching the integral vibration characteristic of a large-scale structure.
The dotted lines in fig. 1 indicate the connection relationship between the respective devices, and the arrow direction indicates the transmission direction of the signal flow.
in this embodiment, the parameters such as the material and the size of the 12 solar panels are the same, and all are epoxy resin plates, and the size is: 600mm × 300mm × 2mm, and the density of the epoxy resin is 1.84g/cm3Poisson's ratio of 0.38 and elastic modulus of Ep34.64 Gpa; each plate is adhered with 21 round mark points, and the material of the mark points is ordinary A4 paper.
the back mounting plate of the microwave transmitting antenna 305 is a circular CFRP plate with the diameter of 1000mm and the density of 1.6g/cm3(ii) a 32 round mark points are stuck on the upper surface of the paper, and the material of the mark points is ordinary A4 paper; the front surface of the antenna is provided with 80 array plates, the size of each array plate is 100mm multiplied by 2mm, the single array plates are made of aluminum alloy, the elastic modulus is 70GPa, the Poisson ratio is 0.3, and the density is 2.71g/cm3。
The conductive slip ring adopts a Senpori H2042 series, the specific model is H2042-12S-C, 12 paths of signals can be supported to be transmitted simultaneously, the maximum current of a single path of signals can be 2A, a slip ring rotor can rotate at 360 degrees, the supported maximum rotating speed reaches 250r/pm, the shell is made of aluminum alloy, and the rotating torque is lower than 0.1 N.m.
The model of the speed reducing stepping motor is 35BY48HJ30, and the manufacturer is Heizhou Baolai electrical appliances company Limited. The inherent step angle of the stepper motor is 7.5 degrees, and the reduction ratio is 1: 30, namely the adjustment precision of the attitude angle is 0.25 degrees, the working voltage of the motor is 12V, the starting torque is 30N cm, the positioning torque is 9N cm, and the speed reduction stepping motor is fixed on the end cover plate through bolts.
The motor driving board adopts a BL-220M stepping motor driver produced by Henzhou Baolai electrical apparatus company, the working voltage is DC12-32V, the driving current is 0.1-2A and can be continuously adjusted, the driving mode is constant-current chopping signal driving, and the driver can set 8 types of subdivision numbers.
The vibration exciter adopts an MS series modal vibration exciter produced by Yangzhou Yingmai measurable control technology limited company, the specific model is MS-200, the maximum exciting force of a single vibration exciter is 200N, the maximum amplitude is +/-10 mm, the exciting frequency range is 0-4 kHz, and the vibration is output by using a mandril mode; the vibration exciter mounting table consists of sectional materials, angle steel, a mounting plate and a plurality of bolts, and the whole size is 330mm multiplied by 370 mm.
the model of the signal generator is YMC9200 digital signal generator, the manufacturer is Yangzhou Yingmai measurable control technology company, the model of the signal generator can generate any two paths of waveform signals according to requirements, and the frequency range is as follows: 0-30 kHz, DA conversion rate up to 500kHz, output signal amplitude: 10 Vp.
the power amplifier is a power amplifier which is manufactured by Jiangsu Union electronics technology limited and has the model number of YE5874A, the rated output power is 800W, the frequency range is 0-10 kHz, and the nonlinear distortion is less than 1%.
The model of the high-speed camera is NAC Memrecam HX-7s, the maximum resolution reaches 2560 x 1920 pixels, a CMOS image sensor is adopted, the shooting speed under high-definition resolution reaches 2000fps, the maximum speed can reach 21000fps, a 32G memory card is arranged in the high-speed camera, various recording modes such as pulse triggering, multi-time triggering, restarting triggering and image triggering are provided, and the single-camera integral weight is 2.9 kg.
The cloud platform of installation camera selects for use two-way hydraulic pressure cloud platform of short news, and the material is the aluminum alloy, and 4kg of biggest bearing, pitch angle around, are: +90 °/-60 °, both pan and tilt damping employ fixed hydraulic chambers.
the linear guide rail is C5HWZ20-L400-X1-E20-E20, and the length of the guide rail is 400 mm.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A vibration detection device of a multi-rotary joint space solar power station is characterized by comprising a multi-rotary joint space solar power station structure, a posture fixing suspension structure, a vibration excitation structure and a vibration detection structure;
many rotary joint space solar power station structure includes rectangle skeleton, microwave transmitting antenna and two solar panel arrays that the structure is the same, and two solar panel arrays pass through rotary joint symmetric connection on the rectangle skeleton, the solar panel array includes N solar panel, and adjacent solar panel adopts rotary joint to connect, and solar panel's the receiving face is 0 degree with the initial angle of horizontal plane, microwave transmitting antenna sets up under the rectangle skeleton
the attitude fixing suspension comprises a plurality of rectangular frames, the top edges of adjacent rectangular frames are connected through an upper cross beam, the bottom edges of adjacent rectangular frames are connected through a lower cross beam, and the multi-rotary joint space solar power station structure is respectively connected with the upper cross beam and the lower cross beam through suspension ropes; the microwave transmitting antenna is fixed on the rectangular frame through a rotary joint, and the computer is connected with the rotary joint through a motor driving plate to change the included angles between the microwave transmitting antenna and the solar panel and the horizontal plane;
The vibration excitation structure comprises a signal generator, a power amplifier, a first vibration exciter and a second vibration exciter, wherein the signal generator is used for amplifying power through the power amplifier to drive the first vibration exciter and the second vibration exciter to generate synchronous vibration, and vibration of the multi-rotary joint space solar power station structure is realized through an output ejector rod;
The vibration detection structure includes: three sets of the same binocular vision units, three sets of the same binocular vision units collect the vibration images of the two solar panel arrays and the microwave transmitting antenna respectively, each binocular vision unit comprises two high-speed cameras, and the two high-speed cameras are connected with a computer.
2. The vibration detection device of a multi-rotary-joint space solar power station as claimed in claim 1, wherein the rotary joint comprises a conductive slip ring, a mounting end cover plate and a speed reduction stepping motor, and the speed reduction stepping motor is connected with a motor drive plate.
3. The vibration detection device of a multi-rotary joint space solar power station as claimed in claim 1, wherein the solar panel array is composed of six solar panels, and rotary joints are arranged at the upper and lower ends of each solar panel.
4. The vibration detection device for the multi-rotary-joint space solar power station as claimed in claim 1, wherein the number of the rectangular frames is four, the distance between adjacent rectangular frames is 2000mm, and the ground clearance of the lower cross beam is 100 mm.
5. The vibration detection device of the multi-rotary joint space solar power station as claimed in claim 1 or 3, wherein the surface of the solar panel is pasted with circular mark points.
6. The vibration detection device of a multi-rotary joint space solar power station as claimed in claim 1, wherein the back surface of the microwave transmitting antenna is a circular carbon fiber plate, a circular mark point is pasted on the back surface of the microwave transmitting antenna, the front surface of the microwave transmitting antenna is a working surface, and the working surface is provided with an antenna array formed by a plurality of rectangular antennas.
7. The vibration detection device for the multi-rotary joint space solar power station as claimed in claim 1, wherein the binocular vision system further comprises two bidirectional hydraulic holders, two linear guides and a support frame, the linear guides are arranged on the support frame, and the two high-speed cameras respectively slide on the linear guides through the bidirectional hydraulic holders.
8. The vibration detecting apparatus in a multi-rotary-joint space solar power station as claimed in claim 1, wherein the number of the suspension ropes is nine, and the suspension ropes are in a tight and vertical state.
9. The vibration detection device of the multi-rotary joint space solar power station as claimed in claim 1, wherein the vibration exciter is connected with the rectangular framework.
10. A method for vibration detection of a multi rotary joint space solar power station based on any of the claims 1-9, characterized by the following steps:
starting a computer, controlling each rotary joint to rotate, and enabling each solar panel and each microwave transmitting antenna to rotate to an initial position;
The high-speed camera completes three-dimensional calibration, objects to be detected are all in the field of view of the high-speed camera, and the starting mode of the high-speed camera is set as computer level signal triggering starting;
The signal generator generates signals, the signals are amplified to appropriate voltage through the power amplifier to drive the two vibration exciters to vibrate, the vibration exciters transmit vibration excitation to the multi-rotary joint solar power station through the output ejector rods, the computer sends out a camera starting signal, the three groups of binocular vision systems simultaneously start to work, and structural vibration images are continuously collected according to a set frame rate;
The computer controls the motor in the rotary joint to rotate, changes the included angle between the sunlight receiving surface of the solar panel and the working surface of the microwave transmitting antenna and the horizontal plane, and collects images under different included angles;
And transmitting the image information in the high-speed camera to a computer for carrying out mark point coordinate extraction, contour edge line identification, coordinate conversion and view reconstruction, and finally obtaining the vibration information of the whole multi-rotary joint solar power station structure.
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