CN102519378B - Device for measuring bending and torsional vibration of hinged plate of phase-sensitive detector (PSD) sensor and method for device - Google Patents

Device for measuring bending and torsional vibration of hinged plate of phase-sensitive detector (PSD) sensor and method for device Download PDF

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CN102519378B
CN102519378B CN 201110392204 CN201110392204A CN102519378B CN 102519378 B CN102519378 B CN 102519378B CN 201110392204 CN201110392204 CN 201110392204 CN 201110392204 A CN201110392204 A CN 201110392204A CN 102519378 B CN102519378 B CN 102519378B
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psd sensor
articulated slab
flexible board
dimensional psd
hinged plate
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CN102519378A (en
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邱志成
凌德芳
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South China University of Technology SCUT
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Abstract

The invention discloses a device for measuring bending and torsional vibration of a hinged plate of a phase-sensitive detector (PSD) sensor and a method for the device. The device comprises a hinged plate body part and a detection part. The hinged plate consists of three flexible plates connected together through hinges; a substrate for fixing the hinged flexible plates is provided with a laser emitter, and a two-dimensional PSD is arranged on the edge at the tail of the hinged plate. When the hinged plates is vibrated, the two-dimensional PSD moves along the vibration of the hinged plate, the positions of light spots generated on the two-dimensional PSD by the laser emitter are also changed, the two-dimensional PSD transmits the detected change information to a computer, and the computer performs decoupling operating to obtain small-amplitude bending and torsional vibration measured parameters of the hinged plate for vibration analysis or control. The invention realizes decoupling of the bending and torsional vibration of the hinged plate structure in detection.

Description

Articulated slab bending and torsion vibration measurement device and the method for PSD sensor
Technical field
The present invention relates to large-scale flexible structural vibration detects, be particularly related to a kind of articulated slab bending and torsion vibration measurement device and method of PSD sensor, be to provide specifically a kind of solar energy sailboard structure for simulation flexible, hinged plurality of plates, application laser PSD sensor-based system is realized the apparatus and method that the bending and torsion modal vibration detects.
Background technology
The solar energy sailboard structure of spacecraft must foldingly be loaded before Spacecraft Launch, after entering the orbit, launches again.Some solar energy sailboard is hinged extensible many attachment structures, and these solar energy sailboard structures have following features: the one, and quality is light, and span is large, and the 2nd, windsurfing and windsurfing, form many bodies and be connected kinematic system between windsurfing and spacecraft.These characteristics cause it to have the complex dynamic characteristics such as frequency is low, damping weak, low frequency modal is intensive.These dynamicss have caused disturbance may evoke the solar energy sailboard structure complicated vibration occurs.In prior art, mode of flexural vibration and the torsion mode vibration control of research simulation solar energy sailboard structure, generally ignore the effect that connects hinge, and solar energy sailboard is simplified to flexible board or flexible beam structure.Prior art is measured by adopting piezoelectric patches, acceleration transducer and angular rate gyroscope etc. realize bending and torsion mode in detection and drive decoupling zero by distributing rationally for the flexible cantilever plate structure, carries out Active Vibration Control.But piezoceramic material is the impacts such as hard brittle material, the intensity of material and fatigue lifetime and space environment temperature, so be subject to certain restrictions in application; The measurement noise of acceleration transducer is relatively large, this need to carry out the filtering processing to vibration signal, and the vibration signal that acceleration transducer signals and angular velocity gyro detect is acceleration and the angle rate signal of coupled spacecraft body also, also needs in actual applications the signal decoupling zero of spacecraft body is fallen.And the limit bandwidth of acceleration sensor, will introduce larger error for the detection of low frequency small magnitude vibration, affect measuring accuracy.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of articulated slab bending and torsion vibration measurement device and method of PSD sensor is provided.
For achieving the above object, the present invention adopts following method and technical scheme:
Articulated slab bending and torsion vibration measurement device and the method for described PSD sensor, this device comprises articulated slab body part, test section;
---the articulated slab body part comprises:
One end of flexible board I 3 is fixed as cantilever slab by machinery mount clamping device and pedestal, and flexible board I 3, flexible board II 5 are connected with hinge II 11 by hinge I 4, and flexible board II 5 is connected with hinge IV 10 by hinge III 6 with flexible board III 7; Flexible board I 3, flexible board II 5, the flexible board III 7 formation articulated slab that is connected through the hinge;
Generating laser 2 is arranged on pedestal by support I 1, and Two-dimensional PSD sensor 8 is arranged on an end of flexible board III 7 by support II 9, the photosurface center of the Two-dimensional PSD sensor 8 when the optical axis aligning articulated slab of generating laser 2 is static;
---test section comprises:
Generating laser 2 is arranged on pedestal by support I 1, the laser of Two-dimensional PSD sensor 8 detection laser transmitter 2 emissions produces the position variation signal of hot spot at Two-dimensional PSD sensor 8 photosurface central points, after Two-dimensional PSD sensor 8 is transferred to 15 processing of PSD sensor signal transaction card by variable signal, be input to computing machine 13 after A/D data collecting card 12, computing machine 13 is connected with display 14.
The method that described device is measured, is characterized in that described method comprises the steps:
The change in location of laser on photosurface of first step Two-dimensional PSD sensor 8 detection laser transmitter 2 emissions, four electrodes of Two-dimensional PSD sensor 8 produce the corresponding electric signal transmission that changes and process to PSD sensor signal transaction card 15, then are input to computing machine 13 after A/D data collecting card 12;
Second step computing machine 13 obtains the position coordinates of laser, then obtains the windup-degree of articulated slab by following decoupling zero computing according to the electric current of Two-dimensional PSD sensor-position coordinates computing formula
Figure 2011103922040100002DEST_PATH_IMAGE001
and bending deformation quantity ;
Described articulated slab end windup-degree with the facula position coordinate
Figure 2011103922040100002DEST_PATH_IMAGE003
, articulated slab end bending deformation quantity
Figure 297145DEST_PATH_IMAGE002
geometric relationship be:
Figure 2011103922040100002DEST_PATH_IMAGE005
Figure DEST_PATH_IMAGE007
Obtain windup-degree by above formula for:
Figure DEST_PATH_IMAGE009
Articulated slab end bending deformation quantity
Figure 730979DEST_PATH_IMAGE010
for:
Figure 596167DEST_PATH_IMAGE012
In formula:
Figure 797341DEST_PATH_IMAGE013
for the facula position lateral coordinates detected,
Figure 2011103922040100002DEST_PATH_IMAGE014
for the facula position along slope coordinate detected,
Figure 380769DEST_PATH_IMAGE015
for the distance of articulated slab Width center line to center, Two-dimensional PSD sensor effective coverage.
The accompanying drawing explanation
Fig. 1 is the hinged flexible board bending and torsion vibration measurement device general structure schematic diagram of PSD sensor of the present invention,
Fig. 2 is hinged flexible board end Two-dimensional PSD left view in Fig. 1,
Fig. 3 is hinged flexible board mode of flexural vibration and torsion mode decoupling principle figure.
Shown in figure: 1-support I, 2-generating laser, 3-flexible board I, 4-hinge I, 5-flexible board II, 6-hinge III, 7-flexible board III, 8-Two-dimensional PSD sensor, 9-support II, 10-hinge IV, 11-hinge II, 12-A/D data collecting card, 13-computing machine, 14-display, 15-PSD sensor signal transaction card.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further details, but enforcement of the present invention is not limited to this.
Embodiment
As shown in Figure 1, a kind of articulated slab bending and torsion vibration measurement device of PSD sensor comprises articulated slab body part, test section;
The articulated slab body part comprises:
One end of flexible board I 3 is fixed as cantilever slab by machinery mount clamping device and pedestal, flexible board I 3, flexible board II 5 are connected with hinge II 11 by hinge I 4, flexible board II 5 is connected with hinge IV 10 by hinge III 6 with flexible board III 7, flexible board I 3, flexible board II 5, the flexible board III 7 formation articulated slab that is connected through the hinge;
Generating laser 2 is arranged on pedestal by support I 1, and Two-dimensional PSD sensor 8 is arranged on an end of flexible board III 7 by support II 9, the photosurface center of the Two-dimensional PSD sensor 8 when the optical axis aligning articulated slab of generating laser 2 is static;
Test section: generating laser 2 produces as light source the impact that light beam is not subject to articulated slab distortion and vibration, Two-dimensional PSD sensor 8 detects the vibration signal of articulated slab terminal edge, after PSD sensor signal transaction card 15 is processed, be input to after computing machine is processed and obtain mode of flexural vibration and the torsion mode vibration information of articulated slab by A/D data collecting card 12, and show in real time on display.
The method that described device is measured, comprise the steps:
The change in location of laser on photosurface of first step Two-dimensional PSD sensor 8 detection laser transmitter 2 emissions, four electrodes of Two-dimensional PSD sensor 8 produce the corresponding electric signal transmission that changes and process to PSD sensor signal transaction card 15, then are input to computing machine 13 after A/D data collecting card 12;
Second step computing machine 13 obtains the position coordinates of laser, then obtains the windup-degree of articulated slab by following decoupling zero computing according to the electric current of Two-dimensional PSD sensor-position coordinates computing formula
Figure 692802DEST_PATH_IMAGE001
and bending deformation quantity
Figure 678075DEST_PATH_IMAGE010
;
Described articulated slab end windup-degree
Figure 548686DEST_PATH_IMAGE001
with the facula position coordinate
Figure 2011103922040100002DEST_PATH_IMAGE016
, articulated slab end bending deformation quantity
Figure 619410DEST_PATH_IMAGE010
geometric relationship be:
Figure 735134DEST_PATH_IMAGE005
Figure 574914DEST_PATH_IMAGE007
Obtain windup-degree by above formula
Figure 55574DEST_PATH_IMAGE001
for:
Figure 410332DEST_PATH_IMAGE009
Articulated slab end bending deformation quantity
Figure 267429DEST_PATH_IMAGE010
for:
Figure 961716DEST_PATH_IMAGE012
In formula:
Figure 675594DEST_PATH_IMAGE013
for the facula position lateral coordinates detected,
Figure 720910DEST_PATH_IMAGE014
for the facula position along slope coordinate detected,
Figure 679901DEST_PATH_IMAGE015
for the distance of articulated slab Width center line to center, Two-dimensional PSD sensor effective coverage.
Hinged flexible board end Two-dimensional PSD left view in Fig. 1 as shown in Figure 2, when hinged flexible board is energized the bending and torsion modal vibration, the hot spot of Two-dimensional PSD sensor 8 detection laser transmitter 2 emissions changes at the coordinate position of its photosurface, the Two-dimensional PSD sensor produces electric signal at four electrodes after this change in location being detected, these electric signal are sent into computing machine after further processing, calculated the positional information that obtains hot spot by computing machine, the pincushion structure Two-dimensional PSD sensor that described model is S1881 electric current-the position coordinates computing formula is as follows:
Figure 228694DEST_PATH_IMAGE017
Figure 2011103922040100002DEST_PATH_IMAGE018
In formula
Figure 379053DEST_PATH_IMAGE019
for photosensitive effective coverage length of side of Two-dimensional PSD sensor,
Figure 2011103922040100002DEST_PATH_IMAGE020
be respectively each electrode current size.
Selected Two-dimensional PSD model is S1881, and its effective light-sensitive surface is 22mm * 22mm, should guarantee that the amplitude of institute's excited vibrational is less than 11mm; Be greater than the vibration of 11mm for amplitude, can be by accelerometer or piezoelectric patches sensor by distributing the detection that realizes bending mode rationally.
As shown in Figure 3, X0-Y0 is base coordinate system, center, PSD photosurface effective coverage when its initial point is just beginning and end vibration of articulated slab, X1-Y1 is the hypothesis fixing auxiliary coordinates of when distortion and PSD sensor that only twists, and X2-Y2 when twisting with flexural deformation and the fixing coordinate system of PSD sensor simultaneously;
When hinged flexible board is energized the bending and torsion modal vibration, the coordinate position of hot spot on its plane of Two-dimensional PSD sensor 8 detection laser transmitter 2 emissions changes, the Two-dimensional PSD sensor produces electric signal at four electrodes after this change in location being detected, these electric signal obtain the positional information of hot spot after further processing, the pincushion structure Two-dimensional PSD sensor that described model is S1881 electric current-the position coordinates computing formula is as follows:
Figure 646086DEST_PATH_IMAGE017
In formula
Figure 310603DEST_PATH_IMAGE019
for photosensitive effective coverage length of side of Two-dimensional PSD sensor,
Figure 631863DEST_PATH_IMAGE020
be respectively each electrode current size.
Detection obtains hot spot coordinate in this coordinate system
Figure 386192DEST_PATH_IMAGE016
, can obtain articulated slab end windup-degree
Figure 123204DEST_PATH_IMAGE001
with coordinate
Figure 213301DEST_PATH_IMAGE016
and articulated slab end bending deformation quantity geometric relationship is:
Figure 619191DEST_PATH_IMAGE021
Figure 222211DEST_PATH_IMAGE022
Can solve and obtain windup-degree
Figure 865682DEST_PATH_IMAGE001
for:
Figure 200848DEST_PATH_IMAGE009
Obtain windup-degree
Figure 992087DEST_PATH_IMAGE001
after, just can solve and obtain articulated slab end bending deformation quantity
Figure 70901DEST_PATH_IMAGE010
for:
Figure DEST_PATH_IMAGE023
Can be regarded as to such an extent that Two-dimensional PSD sensor plane center because reversing the displacement produced is simultaneously:
Figure 631195DEST_PATH_IMAGE024
Figure DEST_PATH_IMAGE025
In above formula:
Figure 701045DEST_PATH_IMAGE026
for the facula position lateral coordinates detected, for the facula position along slope coordinate detected,
Figure 917263DEST_PATH_IMAGE028
for the distance of articulated slab Width center line to center, Two-dimensional PSD sensor effective coverage,
Figure DEST_PATH_IMAGE029
for plate wide 1/2nd.
Obtain dotted line in Fig. 1 and connect the connection layout that means electric signal and signal processing apparatus.
In the present embodiment, the material of flexible board I 3, flexible board II 5, flexible board III 7 can be selected the epoxide resin material thin plate, the optional 850mm * 1100mm of its physical dimension * 3mm, and the cross-directional length shown in Fig. 1 is 850mm, vertical direction is 1100mm, and thickness is 3mm.The Two-dimensional PSD sensor that Two-dimensional PSD sensor 8 can select Hamamatsu company to produce, model S1881, effectively light-sensitive surface is 22mm * 22mm.In concrete application, can measurement range as required select the PSD model.PSD sensor signal transaction card 15 is the PSD signal amplification circuit, by it, can be amplified the output voltage of circuit and the calculated relationship of luminous point position on PSD.The model that A/D data collecting card 12 can select Taiwan Advantech company to produce is PCL-818HDA/D translation data capture card; Computing machine 13 can select Taiwan to grind magnificent IPC610 cabinet, PCA-6006 mainboard, production unit: Taiwan Advantech company.

Claims (2)

1. the articulated slab bending and torsion vibration measurement device of a PSD sensor, is characterized in that this device comprises articulated slab body part, test section;
---the articulated slab body part comprises:
Flexible board I (3), flexible board II (5), flexible board III (7) the formation articulated slab that is connected through the hinge, one end of flexible board I (3) is fixed as cantilever slab by machinery mount clamping device and pedestal, flexible board I (3), flexible board II (5) are connected with hinge II (11) by hinge I (4), and flexible board II (5) is connected with hinge IV (10) by hinge III (6) with flexible board III (7);
Generating laser (2) is arranged on pedestal by support I (1), Two-dimensional PSD sensor (8) is arranged on an end of flexible board III (7) by support II (9), the photosurface center of the Two-dimensional PSD sensor (8) when the optical axis aligning articulated slab of generating laser (2) is static;
---test section comprises:
The laser of Two-dimensional PSD sensor (8) detection laser transmitter (2) emission produces the position variation signal of hot spot at Two-dimensional PSD sensor (8) photosurface central point, after Two-dimensional PSD sensor (8) is transferred to PSD sensor signal transaction card (15) processing by variable signal, be input to computing machine (13) after A/D data collecting card (12), computing machine (13) is connected with display (14).
2. application rights requires the method that 1 described device is measured, and it is characterized in that described method comprises the steps:
First step Two-dimensional PSD sensor (8) detects laser after the change in location at its photosurface center, four electrodes of Two-dimensional PSD sensor (8) produce corresponding electric signal transmission and process to PSD sensor signal transaction card (15), then are input to computing machine (13) after A/D data collecting card (12);
Second step computing machine (13) obtains the position coordinates of laser, then obtains the windup-degree of articulated slab by following decoupling zero computing according to the electric current of Two-dimensional PSD sensor-position coordinates computing formula
Figure 812645DEST_PATH_IMAGE001
and bending deformation quantity
Figure 530065DEST_PATH_IMAGE002
;
Described articulated slab end windup-degree
Figure 925274DEST_PATH_IMAGE001
with the facula position coordinate
Figure 2011103922040100001DEST_PATH_IMAGE003
, articulated slab end bending deformation quantity
Figure 926597DEST_PATH_IMAGE004
geometric relationship be:
Figure 749060DEST_PATH_IMAGE006
Figure 16093DEST_PATH_IMAGE008
Obtain windup-degree by above formula for:
Figure 821555DEST_PATH_IMAGE010
Articulated slab end bending deformation quantity
Figure DEST_PATH_IMAGE011
for:
Figure DEST_PATH_IMAGE013
In formula: for the facula position lateral coordinates detected, for the facula position along slope coordinate detected, for the distance of articulated slab Width center line to center, Two-dimensional PSD sensor effective coverage.
CN 201110392204 2011-11-30 2011-11-30 Device for measuring bending and torsional vibration of hinged plate of phase-sensitive detector (PSD) sensor and method for device Expired - Fee Related CN102519378B (en)

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