CN102519378A - 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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CN102519378A
CN102519378A CN2011103922040A CN201110392204A CN102519378A CN 102519378 A CN102519378 A CN 102519378A CN 2011103922040 A CN2011103922040 A CN 2011103922040A CN 201110392204 A CN201110392204 A CN 201110392204A CN 102519378 A CN102519378 A CN 102519378A
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flexible board
psd sensor
dimensional psd
articulated slab
hinged plate
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CN102519378B (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

PSD sensors are hinged plate benging and twisting vibration measurement apparatus and method
Technical field
The present invention relates to large-size pliable structure vibration detection, more particularly to a kind of PSD sensors are hinged plate benging and twisting vibration measurement apparatus and method, a kind of solar energy sailboard structure for simulation flexible, hinged plurality of plates, the apparatus and method that bending and torsion mode vibration detection are realized using laser PSD sensor-based systems are specifically provided. 
Background technology
The solar energy sailboard structure of spacecraft must fold loading before Spacecraft Launch, reinflated after entering the orbit.Some solar energy sailboards are hinged extensible many attachment structures, and these solar energy sailboard structures have following features：One is light weight, and span is big, and two be windsurfing and windsurfing, and many body connection kinematic systems are constituted between windsurfing and spacecraft.These features cause it to have the complex dynamic characteristics such as frequency is low, the weak, low frequency modal of damping is intensive.These dynamics, which result in disturbance, may evoke the vibration that complexity occurs for solar energy sailboard structure.In the prior art, the mode of flexural vibration of research simulation solar energy sailboard structure and torsion mode vibration control, typically ignore the effect of connects hinge, and solar energy sailboard is simplified into flexible board or flexible girder construction.Prior art, by realizing that bending and torsion mode are decoupled in detection and driving by distributing rationally using piezoelectric patches, acceleration transducer and angular rate gyroscope etc., carries out Active Vibration Control for flexible cantilever plate structure measurement.But piezoceramic material is fragile material, the intensity of material and the influence such as fatigue life and space environment temperature, so using being above subject to certain restrictions；The measurement noise of acceleration transducer is relatively large, this needs to be filtered vibration signal processing, and the acceleration and angle rate signal of acceleration transducer signals and the vibration signal also coupled spacecraft body of angular velocity gyro detection, also need to fall the signal decoupling of spacecraft body in actual applications.Also, the bandwidth limitation of acceleration sensor, is introduced into larger error for the detection that low frequency small magnitude vibrates, influences measurement accuracy. 
  
The content of the invention
Plate benging and twisting vibration measurement apparatus and method are hinged it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of PSD sensors. 
To reach above-mentioned purpose, the present invention uses following methods and techniques scheme： 
Described PSD sensors are hinged plate benging and twisting vibration measurement apparatus and method, and the device includes articulated slab body part, detection part；
--- articulated slab body part includes：
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 by hinge I 4 and hinge II 11, and flexible board II 5 and flexible board III 7 are connected by hinge III 6 and hinge IV 10；Flexible board I 3, flexible board II 5, flexible board III 7 are connected through the hinge composition articulated slab；
Generating laser 2 is arranged on pedestal by support I 1, and Two-dimensional PSD sensor 8 is arranged on one end of flexible board III 7, the photosurface center of the Two-dimensional PSD sensor 8 when the optical axis alignment articulated slab of generating laser 2 is static by support II 9；
--- detection part includes：
Generating laser 2 is arranged on pedestal by support I 1, the laser that the detection generating laser 2 of Two-dimensional PSD sensor 8 is launched produces the position variation signal of hot spot in the photosurface central point of Two-dimensional PSD sensor 8, variable signal is transferred to after the processing of PSD sensor signals processing card 15 by Two-dimensional PSD sensor 8, computer 13 is input to after A/D data collecting cards 12, computer 13 is connected with display 14.
The method that described device is measured, it is characterised in that methods described comprises the following steps： 
Change in location of the laser that the detection generating laser 2 of first step Two-dimensional PSD sensor 8 is launched on photosurface, four electrodes of Two-dimensional PSD sensor 8 produce corresponding change electric signal transmission to the processing of PSD sensor signals processing card 15, then are input to after A/D data collecting cards 12 computer 13；
Second step computer 13 obtains the position coordinates of laser according to electric current-position coordinates computing formula of Two-dimensional PSD sensor, then obtains by decoupling computing as follows the windup-degree of articulated slab
Figure 2011103922040100002DEST_PATH_IMAGE001
And bending deformation quantity
Figure 193873DEST_PATH_IMAGE002
；
Articulated slab end windup-degreeWith facula position coordinate
Figure 2011103922040100002DEST_PATH_IMAGE003
, articulated slab end bend deflection
Figure 297145DEST_PATH_IMAGE002
Geometrical relationship be：
Figure 723446DEST_PATH_IMAGE001
                                                    
                                                
Windup-degree is obtained by above formula
Figure 957058DEST_PATH_IMAGE001
For：
Figure 437324DEST_PATH_IMAGE003
Articulated slab end bend deflection
Figure 730979DEST_PATH_IMAGE010
For：
Figure 2011103922040100002DEST_PATH_IMAGE004
In formula：
Figure 797341DEST_PATH_IMAGE013
For the facula position lateral coordinates detected,
Figure DEST_PATH_IMAGE014
For the facula position longitudinal coordinate detected,For the distance of articulated slab width center line to Two-dimensional PSD sensor active area center.
Brief description of the drawings
Fig. 1 is that PSD sensors of the present invention are hinged flexible plate benging and twisting vibration measurement apparatus general structure schematic diagram,
Fig. 2 is to be hinged flexible board end Two-dimensional PSD left view in Fig. 1,
Fig. 3 is to be 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 cards, 13-computer, 14-display, 15-PSD sensor signals processing card. 
Embodiment
The present invention is described in further details with reference to the accompanying drawings and examples, but the implementation not limited to this of the present invention. 
  
Embodiment
As shown in figure 1, the be hinged plate benging and twisting vibration measurement apparatus of a kind of PSD sensors include articulated slab body part, detection part； 
Articulated slab body part includes：
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 by hinge I 4 and hinge II 11, flexible board II 5 and flexible board III 7 are connected by hinge III 6 and hinge IV 10, and flexible board I 3, flexible board II 5, flexible board III 7 are connected through the hinge composition articulated slab；
Generating laser 2 is arranged on pedestal by support I 1, and Two-dimensional PSD sensor 8 is arranged on one end of flexible board III 7, the photosurface center of the Two-dimensional PSD sensor 8 when the optical axis alignment articulated slab of generating laser 2 is static by support II 9；
Detection part：Generating laser 2 produces light beam and do not deformed and vibrated by articulated slab as light source to be influenceed, Two-dimensional PSD sensor 8 detects the vibration signal of articulated slab terminal edge, after the processing of card 15 being handled through PSD sensor signals, the mode of flexural vibration and torsion mode vibration information that articulated slab is obtained after computer disposal are input to by A/D data collecting cards 12, and is shown in real time over the display.
The method that described device is measured, comprises the following steps： 
Change in location of the laser that the detection generating laser 2 of first step Two-dimensional PSD sensor 8 is launched on photosurface, four electrodes of Two-dimensional PSD sensor 8 produce corresponding change electric signal transmission to the processing of PSD sensor signals processing card 15, then are input to after A/D data collecting cards 12 computer 13；
Second step computer 13 obtains the position coordinates of laser according to electric current-position coordinates computing formula of Two-dimensional PSD sensor, then obtains by decoupling computing as follows the windup-degree of articulated slab
Figure 692802DEST_PATH_IMAGE001
And bending deformation quantity
Figure 678075DEST_PATH_IMAGE010
；
Articulated slab end windup-degree
Figure 548686DEST_PATH_IMAGE001
With facula position coordinate
Figure DEST_PATH_IMAGE016
, articulated slab end bend deflection
Figure 619410DEST_PATH_IMAGE010
Geometrical relationship be：
Figure 30111DEST_PATH_IMAGE001
                                                    
Figure 425320DEST_PATH_IMAGE002
                                                
Windup-degree is obtained by above formula
Figure 55574DEST_PATH_IMAGE001
For：
Figure 239692DEST_PATH_IMAGE003
Articulated slab end bend deflection
Figure 267429DEST_PATH_IMAGE010
For：
Figure 390051DEST_PATH_IMAGE004
In formula：For the facula position lateral coordinates detected,
Figure 720910DEST_PATH_IMAGE014
For the facula position longitudinal coordinate detected,
Figure 679901DEST_PATH_IMAGE015
For the distance of articulated slab width center line to Two-dimensional PSD sensor active area center.
Flexible board end Two-dimensional PSD left view is hinged in Fig. 1 as shown in Figure 2, when being hinged the energized bending of flexible board and torsion mode vibration, the hot spot that the detection generating laser 2 of Two-dimensional PSD sensor 8 is launched changes in the coordinate position of its photosurface, Two-dimensional PSD sensor to detect and produce electric signal in four electrodes after this change in location, these electric signals send into computer after further processing, the positional information for obtaining hot spot is calculated by computer, electric current-position coordinates computing formula of the pillow-like shape Two-dimensional PSD sensor of the model S1881 is as follows： 
Figure 228694DEST_PATH_IMAGE017
Figure DEST_PATH_IMAGE018
In formula
Figure 379053DEST_PATH_IMAGE019
For the Two-dimensional PSD sensor photosurface effective coverage length of side,
Figure DEST_PATH_IMAGE020
Respectively each electrode current size.
Selected Two-dimensional PSD model S1881, its effective photosurface is 22mm × 22mm, should ensure that the amplitude of institute's excited vibrational is less than 11mm；It is more than 11mm vibration for amplitude, then can realizes the detection of bending mode by distributing rationally by accelerometer or piezoelectric patches sensor. 
As shown in Figure 3, X0-Y0 is base coordinate system, PSD photosurfaces effective coverage center when its origin is articulated slab just beginning and end vibration, X1-Y1 is the auxiliary coordinates fixed when assuming only to twist deformation with PSD sensors, and X2-Y2 is the coordinate system fixed during with flexural deformation with PSD sensors that twists simultaneously； 
When being hinged the energized bending of flexible board and torsion mode vibration, the hot spot that the detection generating laser 2 of Two-dimensional PSD sensor 8 is launched changes in the coordinate position of its plane, Two-dimensional PSD sensor to detect and produce electric signal in four electrodes after this change in location, these electric signals obtain the positional information of hot spot after further processing, and electric current-position coordinates computing formula of the pillow-like shape Two-dimensional PSD sensor of the model S1881 is as follows：
Figure 646086DEST_PATH_IMAGE017
Figure 907303DEST_PATH_IMAGE018
In formula
Figure 310603DEST_PATH_IMAGE019
For the Two-dimensional PSD sensor photosurface effective coverage length of side,
Figure 631863DEST_PATH_IMAGE020
Respectively each electrode current size.
Detection obtains hot spot coordinate in this coordinate system and is
Figure 386192DEST_PATH_IMAGE016
, articulated slab end windup-degree can be obtained
Figure 123204DEST_PATH_IMAGE001
With coordinate
Figure 213301DEST_PATH_IMAGE016
And articulated slab end bend deflection
Figure 643145DEST_PATH_IMAGE010
Geometrical relationship is： 
Figure 619191DEST_PATH_IMAGE021
It can solve and obtain windup-degree
Figure 865682DEST_PATH_IMAGE001
For：
Obtain windup-degree
Figure 992087DEST_PATH_IMAGE001
Afterwards, it just can solve and obtain articulated slab end bend deflection
Figure 70901DEST_PATH_IMAGE010
For：
Figure 2011103922040100002DEST_PATH_IMAGE023
Obtain Two-dimensional PSD sensor plane center finally simultaneously is because reversing the displacement produced：
Figure 631195DEST_PATH_IMAGE024
Figure 2011103922040100002DEST_PATH_IMAGE025
In above formula：
Figure 701045DEST_PATH_IMAGE026
For the facula position lateral coordinates detected,
Figure 2011103922040100002DEST_PATH_IMAGE027
For the facula position longitudinal coordinate detected,
Figure 917263DEST_PATH_IMAGE028
For the distance of articulated slab width center line to Two-dimensional PSD sensor active area center,
Figure 2011103922040100002DEST_PATH_IMAGE029
For plate it is wide 1/2nd.
The connection figure that dotted line connection represents electric signal and signal processing apparatus is obtained in Fig. 1. 
In the present embodiment, flexible board I 3, flexible board II 5, the material of flexible board III 7 can select epoxide resin material thin plate, and the optional 850mm × 1100mm of its physical dimension × 3mm, i.e., the cross-directional length shown in Fig. 1 is 850mm, vertical direction is 1100mm, and thickness is 3mm.Two-dimensional PSD sensor 8 can select the Two-dimensional PSD sensor of Hamamatsu companies production, model S1881, and effective photosurface is 22mm × 22mm.In a particular application, measurement range that can be as needed selects PSD models.PSD sensor signals processing card 15 is PSD signal amplifying circuit, and the output voltage of circuit and the calculated relationship of luminous point position on PSD can be amplified by it.A/D data collecting cards 12 can select the model PCL-818HDA/D change data capture cards of Taiwan Advantech company production；Computer 13 can select Taiwan and grind magnificent IPC610 cabinets, PCA-6006 mainboards, production unit：Taiwan Advantech company. 
  

Claims (2)

1. a kind of PSD sensors are hinged plate benging and twisting vibration measurement apparatus and method, it is characterised in that the device includes articulated slab body part, detection part；
--- articulated slab body part includes：
Flexible board I（3）, flexible board II（5）, flexible board III（7）The composition that is connected through the hinge articulated slab, flexible board I（3）One end cantilever slab, flexible board I are fixed as by machinery mount clamping device and pedestal（3）, flexible board II（5）Pass through hinge I（4）With hinge II（11）Connection, flexible board II（5）With flexible board III（7）Pass through hinge III（6）With hinge IV（10）Connection；
Generating laser（2）Pass through support I（1）On pedestal, Two-dimensional PSD sensor（8）Pass through support II（9）Installed in flexible board III（7）One end, generating laser（2）Optical axis alignment articulated slab it is static when Two-dimensional PSD sensor（8）Photosurface center；
--- detection part includes：
Two-dimensional PSD sensor（8）Detect generating laser（2）The laser of transmitting is in Two-dimensional PSD sensor（8）Photosurface central point produces the position variation signal of hot spot, Two-dimensional PSD sensor（8）Variable signal is transferred to PSD sensor signals processing card（15）After processing, by A/D data collecting cards（12）After be input to computer（13）, computer（13）With display（14）Connection.
2. the method measured using claim 1 described device, it is characterised in that methods described comprises the following steps：
First step Two-dimensional PSD sensor（8）Laser is detected after the change in location at its photosurface center, Two-dimensional PSD sensor（8）Four electrodes produce corresponding electric signal transmission to PSD sensor signals processing card（15）Processing, then by A/D data collecting cards（12）After be input to computer（13）；
Second step computer（13）The position coordinates of laser is obtained according to the electric current of Two-dimensional PSD sensor-position coordinates computing formula, then obtains by decoupling computing as follows the windup-degree of articulated slab
Figure 18768DEST_PATH_IMAGE001
And bending deformation quantity
Figure 46767DEST_PATH_IMAGE002
；
Articulated slab end windup-degree
Figure 792131DEST_PATH_IMAGE001
With facula position coordinate
Figure 981804DEST_PATH_IMAGE003
, articulated slab end bend deflection
Figure 943944DEST_PATH_IMAGE002
Geometrical relationship be：
Figure 470608DEST_PATH_IMAGE001
                                                 
Figure 952536DEST_PATH_IMAGE002
                                              
Windup-degree is obtained by above formulaFor：
Figure 945900DEST_PATH_IMAGE003
Articulated slab end bend deflection
Figure 991534DEST_PATH_IMAGE007
For：
Figure 762546DEST_PATH_IMAGE004
In formula：
Figure 741501DEST_PATH_IMAGE009
For the facula position lateral coordinates detected,For the facula position longitudinal coordinate detected,
Figure 2011103922040100001DEST_PATH_IMAGE011
For the distance of articulated slab width center line to Two-dimensional PSD sensor active area center.
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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CN103292720A (en) * 2012-06-29 2013-09-11 上海中航光电子有限公司 Method and system for testing substrate deflection
CN103438816A (en) * 2013-08-16 2013-12-11 合肥工业大学 High-precision measuring device for measuring joint type equipment member bar deformation
CN104142125A (en) * 2014-07-23 2014-11-12 华南理工大学 Piezoelectric plate vibration detection and control device and method based on laser displacement sensor
CN104568354A (en) * 2015-01-22 2015-04-29 华南理工大学 Flexible hinged plate vibration measurement device based on ultrasonic sensors
CN105973453A (en) * 2016-07-25 2016-09-28 重庆大学 Novel tri-axial absolute torsion vibration sensor
CN107167235A (en) * 2017-06-16 2017-09-15 华南理工大学 Cellular board vibration detection device and method are hinged based on digital picture related algorithm
CN108709632A (en) * 2018-07-12 2018-10-26 华南理工大学 A kind of vibration detection device and method of guy rope connection flexible structure
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CN109506582A (en) * 2018-12-11 2019-03-22 上海航天控制技术研究所 A kind of three-dimensional configuration inversion method based on optical measurement
CN109959343A (en) * 2019-03-28 2019-07-02 东南大学 A kind of device and method deformed using laser monitoring super high-rise building
CN110230991A (en) * 2019-06-06 2019-09-13 武汉科技大学 A kind of use for laboratory thin plate groove signal pickup assembly based on PSD
CN112098024A (en) * 2020-08-14 2020-12-18 华南理工大学 Multi-flexible cantilever beam moving and rotating vibration analysis device and control method
CN112325805A (en) * 2020-11-02 2021-02-05 珠海市运泰利自动化设备有限公司 Method for detecting and calibrating PSD (position sensitive detector) angle of non-rotating origin of incident point
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CN105973453A (en) * 2016-07-25 2016-09-28 重庆大学 Novel tri-axial absolute torsion vibration sensor
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CN110230991A (en) * 2019-06-06 2019-09-13 武汉科技大学 A kind of use for laboratory thin plate groove signal pickup assembly based on PSD
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