CN102894965B - Device for detecting pulse signals by light interference method - Google Patents

Device for detecting pulse signals by light interference method Download PDF

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Publication number
CN102894965B
CN102894965B CN201210446221.2A CN201210446221A CN102894965B CN 102894965 B CN102894965 B CN 102894965B CN 201210446221 A CN201210446221 A CN 201210446221A CN 102894965 B CN102894965 B CN 102894965B
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CN
China
Prior art keywords
cylinder
light
arranged
laser generator
glass plate
Prior art date
Application number
CN201210446221.2A
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Chinese (zh)
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CN102894965A (en
Inventor
牟波佳
孙卫伟
马星科
杜政伟
邹新政
朱敏
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西南大学
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Application filed by 西南大学 filed Critical 西南大学
Priority to CN201210446221.2A priority Critical patent/CN102894965B/en
Publication of CN102894965A publication Critical patent/CN102894965A/en
Application granted granted Critical
Publication of CN102894965B publication Critical patent/CN102894965B/en

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Abstract

The invention relates to a device for detecting pulse signals by a light interference method, which comprises a laser generator, a parallel light beam expander, a soft light-reflecting film, a half-reflection lens, a glass plate, a rubber bracket, a singlechip, a charge coupled device (CCD) sensor and the like, wherein the laser generator is arranged in a light channel arranged in the middle of a cylinder; the parallel light beam expander is arranged in front of the laser generator in the light channel; the glass plate is flatly arranged in the middle of the cylinder; after being reflected, the light entering the cylinder is just vertically emitted onto the half-reflection lens; the soft light-reflecting film is arranged under the half-reflection lens; the CCD sensor is arranged on the top of the cylinder; the rubber bracket is connected with the bottom of the cylinder; and a groove used for placing the wrist of a patient is arranged in the middle above the bracket. According to the device, the laser generator can give out light, a light path is controlled by the soft light-reflecting film, the half-reflection lens and the circular glass plate, interference fringe is formed on the top of the device, and the pulse beat frequency and strength can be obtained by the singlechip; and the device is simple in structure, accurate in measurement, safe and reliable.

Description

A kind of device utilizing optical interferometry to detect fluctuating signal

Technical field:

The invention belongs to field of photoelectric technology, be specifically related to light-interference measuring apparatus.

Background technology:

Health is one of problem of paying close attention to the most of modern humans.In traditional Chinese medical science field, traditional prestige, to hear, ask, cut be the marrow formed over the past thousands of years.But feeling the pulse is judge by the subjective experience of the traditional Chinese medical science to a great extent, so causes sometimes judging by accident.Along with the development of electronic technology and intelligent control technology, pulse test is no longer confined to traditional manual testing's method or stethoscope method of testing, and existing research is based on the pulse test of electronic information technology.But current most of achievement in research still sticks to theoretical research, can't apply to reality.Meanwhile, research major part before just achieves the basic function of pulse test, and the correction for details is not very well.

Summary of the invention:

For above problem, object of the present invention is just to provide a kind of device utilizing optical interferometry to detect fluctuating signal, and it obtains the pulse information of people by interference of light, and measure accurately, safe and reliable, structure is simple.

Technical scheme of the present invention is as follows:

Utilize optical interferometry to detect a device for fluctuating signal, described device comprises laser generator, parallel light beam expander, soft light reflecting membrane, half anti-lens, glass plate, rubber standoff, degree of tightness knob, single-chip microcomputer and ccd sensor device.

Described laser generator is arranged in one, the side optical channel in the middle part of cylinder, in optical channel, the front of laser generator arranges parallel light beam expander, portion's safety fills a glass plate within the barrel, the cross section 45° angle of itself and cylinder, also the angle at 45 ° with incident illumination, the light making to enter cylinder from optical channel is after reflection just vertical cross-section directive; In cylinder glass plate reflected light light path on settle half anti-lens, at bottom of cylinder and the soft light reflecting membrane of positioned beneath of half anti-lens, at the top ccd sensor of cylinder.Ccd sensor connects single-chip microcomputer by control signal wire.

Separately being provided with a rubber standoff, is one for laying the groove of patients wrist in the middle of above support, and the wrist of patient can be stablized in the below that described rubber standoff is positioned at described soft light reflecting membrane, and support is connected with cylinder, between regulated by degree of tightness knob.Just put the wrist of people with reeded rubber standoff, degree of tightness knob can regulate the distance of tubular structure and support, and then the tightness degree regulating soft light reflecting membrane to contact with arm.

Only being produced by laser generator in the cylinder of this device, light path is controlled by soft light reflecting membrane, half anti-lens, circular glass plate, thus form interference fringe at device top.

Adopt this device can obtain interference fringe easily, the information of interference fringe is converted to the signal of telecommunication by ccd sensor, and by electrical signal transfer to single-chip microcomputer, carry out by single-chip microcomputer frequency and the intensity that data analysis obtains beat pulse, structure is simple, measures accurately, safe and reliable, be widely used.This device is to the collection of pulse and analyze significant.

Accompanying drawing explanation

Fig. 1 is the structural representation of this device

Detailed description of the invention

This device is described in detail below in conjunction with accompanying drawing:

See Fig. 1, the laser generator 1 of this device and parallel light beam expander 2 are provided with in an optical channel of side in the middle part of cylinder, and laser generator 1 sends light, produce collimated light beam by parallel light beam expander 2.The directional light produced be irradiated to be arranged in the middle part of cylinder with on the circular glass plate 6 at the cross section angle all at 45 ° of incident illumination and cylinder, reflect on circular glass plate surface, the light of reflection arrives on half anti-lens 5 of cylinder bottom, at half anti-lens surface, part luminous reflectance goes back, part Transmission light arrives on the soft light reflecting membrane 4 of bottom of cylinder in the past, light reflects again, thus transillumination and reflected light just create certain optical path difference, and two-beam is received by photoelectric sensing apparatus on cylinder top, two-beam interferes, and forms interference fringe.Below the soft light reflecting membrane 4 being positioned at bottom of cylinder with reeded rubber standoff 3, be connected with cylinder, degree of tightness knob can regulate the distance of tubular structure and the reeded rubber standoff of band, and then the tightness degree regulating soft light reflecting membrane to contact with arm.When the hands of people is placed in rubber standoff 3, beating of pulse makes the reeded rubber standoff of band 3 and soft light reflecting membrane 4 that deformation occur, and cause the optical path difference of two-beam to change, thus interference fringe also changes.In order to form stable interference fringe, be connected with external knob in the side of half anti-lens, half anti-lens are installed in rotation in cylinder, can rotate external knob 8 and change the angle of half anti-lens thus change optical path difference.The difference of beat pulse will form different interference fringes, interference fringe optical signal is converted into the signal of telecommunication by the ccd sensor 7 at top, and give external single-chip microcomputer 9 by electrical signal transfer, single-chip microcomputer 9 processes given signal, and to data analysis, obtain frequency and the strength information of the beat pulse of people.By the analysis to pulse frequency and intensity, the health status of people can be judged.

In this device, ccd sensor can adopt ICX625AQA, and single-chip microcomputer can use Philip 93 series monolithic.

Claims (2)

1. the device utilizing optical interferometry to detect fluctuating signal, it is characterized in that: described device comprises the laser generator be arranged in a cylinder, parallel light beam expander, soft light reflecting membrane, half anti-lens, glass plate and ccd sensor, and pass through the external single-chip microcomputer of control signal wire with ccd sensor;
Described laser generator is arranged in an optical channel of side in the middle part of cylinder, in optical channel, the front of laser generator arranges parallel light beam expander, the incident illumination that laser generator sends forms collimated light beam after parallel light beam expander, a glass plate is installed in portion within the barrel, the cross section angle at 45 ° of itself and cylinder, just penetrates down perpendicular to cross section after the light part of collimated light beam is reflected by glass plate; In cylinder glass plate reflected light light path on settle half anti-lens, at bottom of cylinder and the soft light reflecting membrane of positioned beneath of half anti-lens, ccd sensor is set at the top of cylinder;
Separately being provided with a rubber standoff, is one for laying the groove of patients wrist in the middle of above support, and the wrist of patient can be stablized in the below that described rubber standoff is positioned at described soft light reflecting membrane, and support is connected with cylinder, between regulated by degree of tightness knob.
2. the device utilizing optical interferometry to detect fluctuating signal according to claim 1, it is characterized in that: be connected with external knob in the side of half anti-lens, half anti-lens are installed in rotation in cylinder.
CN201210446221.2A 2012-11-09 2012-11-09 Device for detecting pulse signals by light interference method CN102894965B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210446221.2A CN102894965B (en) 2012-11-09 2012-11-09 Device for detecting pulse signals by light interference method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210446221.2A CN102894965B (en) 2012-11-09 2012-11-09 Device for detecting pulse signals by light interference method

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CN102894965A CN102894965A (en) 2013-01-30
CN102894965B true CN102894965B (en) 2015-05-20

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103479332B (en) * 2013-09-03 2015-03-11 河海大学 Internal arteriovenous fistula pulse test system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2613628B2 (en) * 1988-06-24 1997-05-28 コーリン電子株式会社 Pressure-pulse-wave detection device
KR101065615B1 (en) * 2009-08-27 2011-09-20 한국전기연구원 Pulse wave measuring apparatus using laser speckle image and Pulse wave measuring method using this apparatus
WO2011051903A1 (en) * 2009-10-29 2011-05-05 Ecole Polytechnique Federale De Lausanne (Epfl) Imaging based interferometric pressure sensor
CN101666630B (en) * 2009-10-30 2011-06-22 哈尔滨工业大学深圳研究生院 Method and device for detecting precision wafer based on parallel optical flat splitting polarized beam and phase-shifting interferometry
US9357933B2 (en) * 2010-01-19 2016-06-07 Donna Baldwin Continuous, non-invasive, optical blood pressure monitoring system

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