CN102297852A - Single-shaft driven four-bar mechanism portable SPR detector - Google Patents

Single-shaft driven four-bar mechanism portable SPR detector Download PDF

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Publication number
CN102297852A
CN102297852A CN2011101349872A CN201110134987A CN102297852A CN 102297852 A CN102297852 A CN 102297852A CN 2011101349872 A CN2011101349872 A CN 2011101349872A CN 201110134987 A CN201110134987 A CN 201110134987A CN 102297852 A CN102297852 A CN 102297852A
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China
Prior art keywords
bar mechanism
light source
slide block
screw rod
bar
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Pending
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CN2011101349872A
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Chinese (zh)
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韦天新
裴芳誉
李志辉
劳捷
鲍涵
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Beijing Institute of Technology BIT
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Beijing Institute of Technology BIT
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Priority to CN2011101349872A priority Critical patent/CN102297852A/en
Publication of CN102297852A publication Critical patent/CN102297852A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a single-shaft driven four-bar mechanism portable SPR detector, and belongs to the field of detection technology. The invention comprises a bearer, a screw, a sliding block, a sample bench, a four-bar mechanism, a light source, a signal receiver, a signal processing module. A sliding block supporting bar is simultaneously fixed at supporting plates at the two ends of the bearer; the sliding block is slidingly connected to the sliding block supporting bar; a stepping motor and the sample bench are respectively fixed on the supporting plates at the two ends of the bearer; one end of the screw is connected to the stepping motor, and the other end of the screw passes through a screw hole of the sliding block and is movably connected to the supporting plate at the other end; a group of opposite angles of the four-bar mechanism are movably connected to the supporting plate at the sample bench end and the sliding block respectively, and the light source and the signal receiver are fixed on the four-bar mechanism; the signal processing module are connected to the stepping motor and the signal receiver simultaneously. The detector of the invention has a simple structure, does not need light path correction before application, and has a wide scanning angle range, high precision, and good sensitivity; the angle changes of incident light and reflected light are strictly symmetric, which reduces errors.

Description

A kind of portable SPR detector of single shaft transmission four-bar mechanism
Technical field
The present invention relates to a kind of portable SPR detector of single shaft transmission four-bar mechanism, belong to the detection technique field.
Background technology
Surface plasma body resonant vibration (SPR) is a kind of physical optics phenomenon.The electromagnetic wave of propagating along the interface between metal and dielectric forms surface plasma (SP).When the polarized light of parallel surfaces impinges upon on the interface with resonance angle, total reflection takes place, incident light and surface plasma coupling cause surface plasma body resonant vibration (SPR), the boundary reflection rate significantly reduces.SPR is very responsive to the dielectric attached to the metal surface, all can be detected attached to the dielectric on the metal surface.Refractive index is dielectric inherent feature, and the dielectric of different refractivity causes the resonance angle difference of SPR.Commaterial, attached to the amount difference of metal surface, the response intensity difference of SPR.According to above-mentioned principle, usually can be fixed on metal (gold, silver etc.) the film surface of tens nanometer thickness with the function dielectric that sample reacts, behind dielectric and the example reaction, variations in refractive index, resonance angle changes, and utilizes the variation of dielectric resonance angle that sample is carried out quantitatively or qualitative analysis.
At present, most widely used SPR detector mainly contains two kinds on angular modulation type and wavelength-modulated type.Wavelength-modulated type SPR detector device is simple and easy, cheap, and general portable SPR detector all adopts the wavelength-modulated method, and still, wavelength-modulated is difficult to realize the scanning angle narrow range.Angular modulation SPR detector principle is simple, accuracy of detection is high, the scanning angle scope is wide, but, device is complicated, be difficult to miniaturization, be restricted in the application aspect the integrated portable type, and light source and signal receiver are equipped on respectively independently on the axle, are rotated by two turntables controls during adjusting angle, have increased the error that produces in the process of angular modulation.
Summary of the invention
The objective of the invention is in order to overcome conventional portable SPR detector scanning angle scope little, need to proofread and correct light path before the use, and the two rotation table devices of twin shaft are introduced the problem than mistake etc., and the invention provides a kind of portable SPR detecting device of the single shaft transmission four-bar mechanism based on angular modulation.This detector scanning angle scope is wide, does not need to proofread and correct before use light path, can directly test, and one-axis system reduces the error of instrument, and is simple in structure, integrated degree height, and error is little.
The objective of the invention is to be achieved through the following technical solutions:
The portable SPR detector of a kind of single shaft transmission four-bar mechanism of the present invention comprises bearing 1, screw rod 2, slider support bar 3, slide block 4, sample stage 5, four-bar mechanism 6, light source 7, signal receiver 8, stepper motor and signal processing module.
Slider support bar 3 is fixed with the back up pad at bearing 1 two ends simultaneously, slide block 4 is slidingly connected on the slider support bar 3, slide block 4 can be slided along slider support bar 3, have screw on the slide block 4, fixing stepper motor on the back up pad of bearing 1 one ends, the back up pad of the bearing other end is carried sample stage 5, and the work top of sample stage 5 is vertical with slider support bar 3; The back up pad that screw rod 2 one ends pass bearing stepper motor end is connected with the rotor of stepper motor, and screw rod 2 other ends pass the screw of slide block 4, and with the back up pad flexible connection of bearing sample you, screw rod 2 is parallel with slider support bar 3; Four-bar mechanism 6 is four isometric support bars, flexibly connect from beginning to end by each support bar, composition can be along the diamond structure of diagonal telescopic movable, one group of diagonal angle of four-bar mechanism 6 flexibly connects with the back up pad of sample you and slide block 4 respectively, and the plane that four-bar mechanism 6 is formed is vertical with the work top of sample stage 5, difference fixed light source 7 and signal receiver 8 on two support bars of four-bar mechanism 6 sample yous, adjacent two support bar junctions are provided with the draw-in groove structure of restriction telescopic movable angle in the four-bar mechanism 6, are used to limit the scanning angle scope and prevent the light source impact detector; Signal processing module is connected with stepper motor, signal receiver 8 simultaneously, the rotor rotation of signal processing module control step motor, and then drive slide block 4 moves the signal that the synchronous signal processing module receives and processing signals receiver 8 is collected on screw rod 2.
Described light source 7 is LED pointolite or LASER Light Source, and described signal receiver 8 is CCD receiver or photoelectric cell receiver.
Sample platform 5 links to each other with trimming handle 9 by the fine setting screw rod, rotates trimming handle, and sample stage is moved forward and backward along screw rod 2 directions, realizes the fine setting to the sample stage position.
The course of work
During use, prism 10 is placed on the sensing chip 11, after the unitized construction of prism and sensing chip is covered in sample cell 12 centers, is equipped on sample stage 5 centers jointly, selectes and load onto light source 7 and signal receiver 8; Signal processing module control step motor, driving slide block 4 moves on screw rod 2, change the configuration of four-bar mechanism 6, regulate light source 7 and signal receiver 8 to required initial scanning angle, the light beam that light source sends forms polarized light through polaroid, inject the interface of prism 10 and sensing chip 11, enter signal receiver 8 through reflection, signal is passed signal processing module back and is carried out analyzing and processing.Signal processing module control step motor, driving slide block 4 moves on screw rod 2 continuously with a fixed step size, make light source 7 and signal receiver 8 begin its present position of continuous symmetry change by initial operating angle, when incident angle of light causes the SPR effect during for resonance angle, it is the most weak that intensity of reflected light reduces to, signal receiver 8 is passed the signal of collecting back signal processing module, handles obtaining experimental data through signal processing module.
Beneficial effect
The present invention adopts single shaft transmission four-bar mechanism, has solved conventional portable SPR detector scanning angle narrow range, needs to proofread and correct light path before the use, and the two rotation table devices of twin shaft are introduced than problems such as mistakes.The portable SPR detecting device of single shaft transmission four-bar mechanism has not only kept the high and good advantage of sensitivity of traditional SPR detector precision, goes back simplification device, and detector volume is dwindled, and is easy to carry, and changes the single shaft transmission into, the error that causes when reducing adjusting angle.The draw-in groove structure that certain angle is arranged on the four-bar mechanism 6 can prevent that light source 7 and detecting device 8 from bumping against.Based on the accurate control of stepper motor and the characteristic of four-bar mechanism 6, the resolution of scanning angle can reach 0.01 °.Four-bar mechanism 6 moves in the single shaft direction, and the position of symmetry change light source 7 and signal receiver 8 makes incident light and catoptrical angle change strict symmetry simultaneously, has reduced error.
Description of drawings
Fig. 1 is the structural representation of SPR detecting device of the present invention;
Fig. 2 detects the SPR curve of naked golden sensing chip for SPR detecting device of the present invention;
Wherein, bearing-1; Screw rod-2; Slider support bar-3; Slide block-4; Sample stage-5; Four-bar mechanism-6; Light source-7; Signal receiver-8; Trimming handle 9; Prism-10; Sensing chip-11; Sample cell-12;
Embodiment
Below in conjunction with accompanying drawing with to the test experiments embodiment of naked golden sensing chip content of the present invention is described further;
Embodiment
As shown in Figure 1, the portable SPR detector of a kind of single shaft transmission four-bar mechanism of the present invention comprises bearing 1, screw rod 2, slider support bar 3, slide block 4, sample stage 5, four-bar mechanism 6, light source 7, signal receiver 8, trimming handle 9, stepper motor and signal processing module.
Slider support bar 3 is fixed with the back up pad at bearing 1 two ends simultaneously, slide block 4 is slidingly connected on the slider support bar 3, slide block 4 can be slided along slider support bar 3, have screw on the slide block 4, fixing stepper motor on the back up pad of bearing 1 one ends, the back up pad of the bearing other end is carried sample stage 5, and the work top of sample stage 5 is vertical with slider support bar 3; The back up pad that screw rod 2 one ends pass bearing stepper motor end is connected with the rotor of stepper motor, and screw rod 2 other ends pass the screw of slide block 4, and with the back up pad flexible connection of bearing sample you, screw rod 2 is parallel with slider support bar 3; Four-bar mechanism 6 is four isometric support bars, flexibly connect from beginning to end by each support bar, composition can be along the diamond structure of diagonal telescopic movable, one group of diagonal angle of four-bar mechanism 6 flexibly connects with the back up pad of sample you and slide block 4 respectively, and the plane that four-bar mechanism 6 is formed is vertical with the work top of sample stage 5, difference fixed light source 7 and signal receiver 8 on two support bars of four-bar mechanism 6 sample yous, adjacent two support bar junctions are provided with the draw-in groove structure of restriction telescopic movable angle in the four-bar mechanism 6, are used to limit the scanning angle scope and prevent the light source impact detector; Four-bar mechanism 6 is that the activity point of view scope on limit is 25 °～80 ° with the support bar of carrying light source 7 and signal receiver 8; Signal processing module is connected with stepper motor, signal receiver 8 simultaneously, the rotor rotation of signal processing module control step motor, and then drive slide block 4 moves the signal that the synchronous signal processing module receives and processing signals receiver 8 is collected on screw rod 2.
Sample platform 5 links to each other with trimming handle 9 by the fine setting screw rod, rotates trimming handle, and sample stage is moved forward and backward along screw rod 2 directions in the scope of 2～5mm, realizes the fine setting of sample stage position.
During use, prism 10 is placed on the sensing chip 11, after the unitized construction of prism and sensing chip is covered in sample cell 12 centers, is equipped on sample stage 5 centers jointly, and light source 7 is selected the LED electric light source for use, and signal receiver 8 is selected the CCD receiver for use; Signal processing module control step motor, driving slide block 4 moves on screw rod 2, change the configuration of four-bar mechanism 6, regulate light source 7 and signal receiver 8 to required initial scanning angle, the light beam that light source sends forms polarized light through polaroid, inject the interface of prism 10 and sensing chip 11, enter signal receiver 8 through reflection, signal is passed signal processing module back and is carried out analyzing and processing.Signal processing module control step motor, driving slide block 4 moves on screw rod 2 continuously with a fixed step size, make light source 7 and signal receiver 8 begin its present position of continuous symmetry change by initial operating angle, when incident angle of light causes the SPR effect during for resonance angle, it is the most weak that intensity of reflected light reduces to, signal receiver 8 is passed the signal of collecting back signal processing module, handles the gained data as shown in Figure 2 through signal processing module.

Claims (2)

1. the portable SPR detector of a single shaft transmission four-bar mechanism is characterized in that: comprise bearing (1), screw rod (2), slider support bar (3), slide block (4), sample stage (5), four-bar mechanism (6), light source (7), signal receiver (8), stepper motor and signal processing module;
Slider support bar (3) is fixed with the back up pad at bearing (1) two ends simultaneously, slide block (4) is slidingly connected on the slider support bar (3), slide block (4) can be slided along slider support bar (3), slide block has screw on (4), fixing stepper motor on the back up pad of bearing (1) one end, the back up pad of the bearing other end is carried sample stage (5), and the work top of sample stage (5) is vertical with slider support bar (3); The back up pad that screw rod (2) one ends pass bearing stepper motor end is connected with the rotor of stepper motor, and screw rod (2) other end passes the screw of slide block (4), and with the back up pad flexible connection of bearing sample you, screw rod (2) is parallel with slider support bar (3); Four-bar mechanism (6) is four isometric support bars, flexibly connect from beginning to end by each support bar, composition can be along the diamond structure of diagonal telescopic movable, one group of diagonal angle of four-bar mechanism (6) flexibly connects with the back up pad of sample you and slide block (4) respectively, and the plane that four-bar mechanism (6) is formed is vertical with the work top of sample stage (5), difference fixed light source (7) and signal receiver (8) on two support bars of four-bar mechanism (6) sample you, adjacent two support bar junctions are provided with the draw-in groove structure of restriction telescopic movable angle in the four-bar mechanism (6), are used to limit the scanning angle scope and prevent the light source impact detector; Signal processing module is connected with stepper motor, signal receiver (8) simultaneously, the rotor rotation of signal processing module control step motor, and then drive slide block (4) at upward motion of screw rod (2), the signal that the synchronous signal processing module receives and processing signals receiver (8) is collected;
Described light source (7) is LED pointolite or LASER Light Source, and described signal receiver (8) is CCD receiver or photoelectric cell receiver.
2. the portable SPR detector of a kind of single shaft transmission four-bar mechanism as claimed in claim 1, it is characterized in that: sample platform (5) links to each other with trimming handle (9) by the fine setting screw rod, rotate trimming handle, sample stage is moved forward and backward along screw rod (2) direction, realize fine setting the sample stage position.
CN2011101349872A 2011-05-24 2011-05-24 Single-shaft driven four-bar mechanism portable SPR detector Pending CN102297852A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103728272A (en) * 2013-12-11 2014-04-16 王丽红 SPR (Surface Plasma Resonance) imaging detection device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1089434C (en) * 1998-06-08 2002-08-21 中国科学院电子学研究所 Surface plasma resonance tester
US20050012932A1 (en) * 2003-05-27 2005-01-20 Aisin Seiki Kabushiki Kaisha Surface plasmon resonance measuring device
CN1831527A (en) * 2005-03-08 2006-09-13 中国科学院电子学研究所 Single-channel multi-parameter surface plasms resonance tester
CN100535641C (en) * 2006-03-30 2009-09-02 中国科学院电子学研究所 High flux multiparameter imaging surface plasma resonance test instrument
CN101251483B (en) * 2008-01-11 2010-06-16 北京金菩嘉医疗科技有限公司 Test analytical instrument using surface plasma resonance oscillation detection technique
CN101881661A (en) * 2009-05-07 2010-11-10 黑龙江大学 Prismatic angle matching surface plasma resonance detector

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1089434C (en) * 1998-06-08 2002-08-21 中国科学院电子学研究所 Surface plasma resonance tester
US20050012932A1 (en) * 2003-05-27 2005-01-20 Aisin Seiki Kabushiki Kaisha Surface plasmon resonance measuring device
CN1831527A (en) * 2005-03-08 2006-09-13 中国科学院电子学研究所 Single-channel multi-parameter surface plasms resonance tester
CN100535641C (en) * 2006-03-30 2009-09-02 中国科学院电子学研究所 High flux multiparameter imaging surface plasma resonance test instrument
CN101251483B (en) * 2008-01-11 2010-06-16 北京金菩嘉医疗科技有限公司 Test analytical instrument using surface plasma resonance oscillation detection technique
CN101881661A (en) * 2009-05-07 2010-11-10 黑龙江大学 Prismatic angle matching surface plasma resonance detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103728272A (en) * 2013-12-11 2014-04-16 王丽红 SPR (Surface Plasma Resonance) imaging detection device
CN103728272B (en) * 2013-12-11 2016-03-16 王丽红 Surface plasma resonance image-forming pick-up unit

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Application publication date: 20111228