CN110101373A - A kind of pulses measure method and system based on laser speckle - Google Patents
A kind of pulses measure method and system based on laser speckle Download PDFInfo
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- CN110101373A CN110101373A CN201910515686.0A CN201910515686A CN110101373A CN 110101373 A CN110101373 A CN 110101373A CN 201910515686 A CN201910515686 A CN 201910515686A CN 110101373 A CN110101373 A CN 110101373A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/7475—User input or interface means, e.g. keyboard, pointing device, joystick
- A61B5/748—Selection of a region of interest, e.g. using a graphics tablet
Abstract
A kind of pulses measure method and system based on laser speckle that the invention discloses a kind of, wherein related sphygmus measurement system based on laser speckle, comprising: laser module, image capture module, host computer；The laser module for irradiating beat pulse position, and generates laser speckle；Described image acquisition module is connect with the laser module, for the laser speckle of the generation to be imaged and acquired；The host computer is connect with described image acquisition module, for handling collected speckle image, obtains the information of beat pulse.The present invention can complete the measurement of pulse, and realize the non-contact measurement to pulse.
Description
Technical field
The present invention relates to laser measuring technique field more particularly to a kind of pulses measure method based on laser speckle and it is
System.
Background technique
Pulse is the tangible arteriopalmus arrived of people's body surface.Human recycle system is made of heart, blood vessel, blood, is born
Blame the transport of human body oxygen, carbon dioxide, nutrient and waste.Blood squeezes inflow via the left ventricular contraction of heart actively
Arteries and veins is transmitted to systemic arterial immediately.Artery forms pipeline by flexible connective tissue and muscle.When a large amount of blood enter
Artery will make arterial pressure become larger and expand caliber, can experience this expansion in the shallower place's artery of body surface, i.e., so-called arteries and veins
It fights.With the contraction and diastole of cardiac rhythmicity, ductus arteriosus wall can make corresponding expansion and retraction reaction, and shallowly move in table
Beating can be touched on arteries and veins.The pulse of normal person and heartbeat are consistent, and are the small rule vibrations of amplitude, have important
Clinical meaning is an important physiological health index.Normal adult is 60 to 100 beats/min, be often it is 70-80 time per minute, it is flat
About 72 beats/min.The elderly is slower, is 55 to 60 beats/min.The frequency of pulse is influenced by age and gender, and fetus is per minute
110-160 times, baby is 120-140 times per minute, and child is 90-100 times per minute, and disease in school age children is 80-90 times per minute.
Method used in pulse detection at present mainly has b12extrocardiography and photoplethysmographic graphical method.The former is
Traditional pulses measure method, the latter are also required to be close to body surface use, easily cause patient's discomfort, can not accomplish to pulse
Non-contact measurement.As the patent of Publication No. CN108720189A discloses a kind of automatic water life-saving bracelet, rhythm of the heart
Device measures pulse by photoplethysmographic graphical method, obtains accurate pulse data；Again by photoelectric sensor quilt
Measuring signal is converted into optical signal, then converts optical signals into electric signal by photoelectric cell；By comparator by Pulse Rate
According to mean value be compared with the standard value drafted, judge pulse data whether within safe range；Then pass through water conduction
Device switchs to determine whether two judgment basis of overboard formation；Then, digital letter is converted analog signals by A/D converter
Number send MCU processing to, MCU is by handling the digital signal that A/D converter transmits, if surveyed pulse frequency is being endangered
Within dangerous frequency range, control signal enabling warning device is generated, realizes alarm, and trigger switch, starting air charging system makes
Bracelet inflation, and then make drowning person floating to the water surface.Although it can collect pulse, it is using photoelectricity volume pulsation
Wave graphical method, or exist and need to be close to body surface use, patient's discomfort is easily caused, can not accomplish the contactless survey to pulse
Amount.
The prior art also has research to realize contactless pulses measure using the method for laser interference, but realizes and need
Two beam laser alignments, equipment is complex, is subject to certain restrictions in operation.In fact, being waited for using single beam coherent laser illumination
After surveying medium, there are optical path differences for the scattering light of different directions, and a large amount of different scattering light generate interference after space is met, if interference
It is mutually long, then speck is shown as, conversely, if interference cancellation, shows as blackening.On entire receiving plane, formed irregular dry
Strength Space and Annual distribution are related to, in the spot of macroscopically representing intensity random fluctuation, referred to as laser speckle.
Therefore, it is above-mentioned to solve that the present invention provides a kind of pulses measure method and system based on laser speckle
Problem.
Summary of the invention
The purpose of the present invention is in view of the drawbacks of the prior art, provide a kind of pulses measure method based on laser speckle
And system.The measurement of pulse can be completed, and realizes the non-contact measurement to pulse.
In order to achieve the goal above, the invention adopts the following technical scheme:
A kind of sphygmus measurement system based on laser speckle, comprising: laser module, image capture module, host computer；
The laser module for irradiating beat pulse position, and generates laser speckle；
Described image acquisition module is connect with the laser module, for the laser speckle of the generation to be imaged
And it acquires；
The host computer is connect with described image acquisition module, for handling collected speckle image, is obtained
The information of beat pulse.
Further, the laser module includes laser and light beam shaping module；The laser is for providing high phase
Dry light source irradiates beat pulse position, and generates laser speckle；The light beam shaping module is for being adjusted light beam.
Further, described image acquisition module is also used to collected speckle image being sent to host computer and will be upper
The instruction of machine control laser module is sent to laser module；Described image acquisition module includes imaging sensor and imaging lens；
Described image sensor is for being imaged and being acquired to the laser speckle of generation；The imaging lens be used for speckle be imaged into
Row is adjusted.
Further, described to handle collected speckle image, wherein processing mode includes Digital Image Processing
And signal processing.
Further, the host computer is one of embedded system, computer.
Correspondingly, a kind of pulses measure method based on laser speckle is also provided, comprising steps of
S1. beat pulse position is irradiated, and generates laser speckle；
S2. the laser speckle of the generation is imaged and is acquired；
S3. collected speckle image is handled, obtains the information of beat pulse.
It further, further include being adjusted to light beam in the step S1.
Further, the step S2 further includes that speckle imaging is adjusted.
Further, collected speckle image is handled in the step S3, wherein processing mode includes number
Image procossing and signal processing.
Further, carrying out processing to collected speckle image in the step S3 is handled by host computer,
In, host computer is one of embedded system, computer.
Compared with prior art, the invention has the following advantages that
1. speckle image is analyzed by the Related Computational Methods of Digital Image Processing the present invention is based on laser speckle principle,
It obtains the relative displacement of the Time Continuous of irradiation area, then processing is filtered etc. to relative displacement signal, so that it may complete arteries and veins
It fights the measurement of signal, has the characteristics that Poul Dorset Sheep, non-destructive testing.
2. the invention avoids with detected material directly contact, and optical detection principle be affected by the external environment it is small,
So having the characteristics that high sensitivity, high reliablity, strong antijamming capability.
3. the present invention using laser speckle technique, has, system is succinct, building is flexible, easy-to-use, has a wide range of application
Feature.
Detailed description of the invention
Fig. 1 is a kind of sphygmus measurement system structure chart based on laser speckle that embodiment one provides；
Fig. 2 is a kind of pulses measure method flow diagram based on laser speckle that embodiment two provides；
Fig. 3 is that embodiment one, two provides a kind of pulses measure schematic diagram based on laser speckle.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
The purpose of the present invention is in view of the drawbacks of the prior art, provide a kind of pulses measure method based on laser speckle
And system.
Embodiment one
The present embodiment provides a kind of sphygmus measurement systems based on laser speckle, as shown in Figure 1, comprising: laser module 11,
Image capture module 12, host computer 13；
Laser module 11 for irradiating beat pulse position, and generates laser speckle；
Image capture module 12 is connect with laser module 11, for the laser speckle of generation to be imaged and acquired；
Host computer 13 is connect with image capture module 12, for handling collected speckle image, obtains pulse
The information of bounce.
In laser module 11, for irradiating beat pulse position, and laser speckle is generated.
Wherein, laser module includes laser and light beam shaping module.
Laser refers to the device that can emit laser.In the present embodiment, laser is laser diode, diode laser
One of device, gas laser, solid state laser, dye laser, semiconductor laser.
Light beam shaping module refers to the device being adjusted to light beam.In the present embodiment, light beam shaping module is lens
Formula beam steering devices, reflected light beams adjustment device, acousto-optic modulator, electrooptic modulator, liquid crystal beam adjust device, micro-nano
One of structure beam steering devices.
Specifically, in the present embodiment, the laser illuminates tested organism for providing stable high-coherence light source
The beat pulse position of artery generates laser speckle；The light beam shaping module expands filtering, adjustment beam divergence for carrying out
Angle, the size for adjusting laser speckle and distribution etc..
In image capture module 12, for the laser speckle of generation to be imaged and is acquired.
In the present embodiment, image capture module connection laser module and host computer, both can be by collected speckle
Image is sent to host computer, the instructions such as the control laser module laser switch, signal and light beam of host computer adjustment can also be sent out
It send to laser module.
Wherein, image capture module includes imaging sensor and imaging lens.
Imaging sensor refers to the photoelectric converting function using photoelectric device, and the light image on photosurface is converted to and light image
At the electric signal of corresponding proportion relationship.Imaging sensor is that the light image on its light-receiving surface is divided into many junior units, is converted
At a kind of function element of available electric signal.Imaging sensor is divided into vidicon and solid state image sensor.
Specifically, in the present embodiment, described image sensor is used to dissipate the laser at the beat pulse position being illuminated
Spot carries out imaging and in real time acquisition, and the image information of acquisition is sent to host computer and transmits PC control laser module
Instruction；The imaging lens are used to that speckle imaging to be adjusted, and the mode of adjusting includes focusing, focusing etc..
In host computer 13, for handling collected speckle image, the information of beat pulse is obtained.
Host computer refers to the computer that can directly issue manipulation command, shows various signal intensities on the screen.
In the present embodiment, host computer includes one kind of embedded system, computer, mobile terminal etc..
In the present embodiment, collected speckle image is handled, wherein processing mode includes Digital Image Processing
And signal processing.
In the present embodiment, host computer is attached with image capture module and is communicated by USB or other interfaces, is used for
The speckle image information for receiving pulse carries out Digital Image Processing and signal processing to collected speckle image, to obtain
The beat pulse information of irradiated artery site.
A kind of sphygmus measurement system based on laser speckle provided in the present embodiment, as shown in figure 3, its working principle is such as
Under:
The beat pulse position that tested organism artery is irradiated first with the laser alignment in laser module, forms and swashs
Light speckle optical path adjusts the size and distribution of laser speckle by the light beam shaping module in laser module；Select region of interest
Domain be imaged and adopt in real time using laser speckle image of the imaging sensor in image processing module to beat pulse position
Collection records continuous pulse speckle image, and by the imaging lens in image processing module to the size that speckle is imaged and clearly
Clear degree is adjusted, and speckle image information is uploaded to host computer by image processing module；Then to continuous pulse speckle image
Digital speckle image processing is carried out, the correlation between sequential frame image is calculated using digital speckle related algorithm, obtains speckle pattern
As continuous relative displacement in time；Pulse signal is filtered into finally by frequency identification and number to handle, and obtains pulse
Information.
Compared with prior art, the invention has the following advantages that
1. speckle image is analyzed by the Related Computational Methods of Digital Image Processing the present invention is based on laser speckle principle,
It obtains the relative displacement of the Time Continuous of irradiation area, then processing is filtered etc. to relative displacement signal, so that it may complete arteries and veins
It fights the measurement of signal, has the characteristics that Poul Dorset Sheep, non-destructive testing.
2. the invention avoids with detected material directly contact, and optical detection principle be affected by the external environment it is small,
So having the characteristics that high sensitivity, high reliablity, strong antijamming capability.
3. the present invention using laser speckle technique, has, system is succinct, building is flexible, easy-to-use, has a wide range of application
Feature.
Embodiment two
The pulses measure method based on laser speckle that the present embodiment provides a kind of, as shown in Fig. 2, comprising steps of
S11. beat pulse position is irradiated, and generates laser speckle；
S12. the laser speckle of the generation is imaged and is acquired；
S13. collected speckle image is handled, obtains the information of beat pulse.
In step s 11, beat pulse position is irradiated, and generates laser speckle.
In the present embodiment, beat pulse position is irradiated, and generating laser speckle is by laser illumination.
Wherein, laser refers to the device that can emit laser.In the present embodiment, laser is laser diode, two poles
One of pipe laser, gas laser, solid state laser, dye laser, semiconductor laser.
It in step s 11, further include being adjusted to light beam, wherein being adjusted to light beam is to pass through light beam shaping module
Adjustment.
Light beam shaping module refers to the device being adjusted to light beam.In the present embodiment, light beam shaping module is lens
Formula beam steering devices, reflected light beams adjustment device, acousto-optic modulator, electrooptic modulator, liquid crystal beam adjust device, micro-nano
One of structure beam steering devices.
Specifically, providing stable high-coherence light source by laser, the beat pulse portion of tested organism artery is illuminated
Position generates laser speckle；Then light beam shaping module carries out expanding filtering, adjustment beam divergence angle, adjusts the big of laser speckle
Small and distribution etc..
In step s 12, the laser speckle of generation is imaged and is acquired.
In the present embodiment, being imaged and being acquired to the laser speckle of generation is realized by imaging sensor.
Imaging sensor refers to the photoelectric converting function using photoelectric device, and the light image on photosurface is converted to and light image
At the electric signal of corresponding proportion relationship.Imaging sensor is that the light image on its light-receiving surface is divided into many junior units, is converted
At a kind of function element of available electric signal.Imaging sensor is divided into vidicon and solid state image sensor.
It in step s 12, further include that speckle imaging is adjusted；Wherein, speckle imaging is adjusted is to pass through into
As camera adjusting.
It in step s 12, further include that collected speckle image is sent to host computer.
Specifically, imaging sensor carries out imaging and in real time acquisition to the laser speckle at the beat pulse position being illuminated,
Speckle imaging is adjusted by imaging lens, the mode of adjusting includes focusing, focusing etc. finally, finally by the image of acquisition
Information is sent to host computer.
In step s 13, collected speckle image is handled, obtains the information of beat pulse.
It in the present embodiment, to collected speckle image is carried out processing is handled by host computer.
Wherein, host computer refers to the computer that can directly issue manipulation command, shows various signal intensities on the screen.
In the present embodiment, host computer includes one kind of embedded system, computer, mobile terminal etc..
In the present embodiment, collected speckle image is handled, wherein processing mode includes Digital Image Processing
And signal processing.
Specifically, host computer receives the speckle image information of pulse, collected speckle image is carried out at digital picture
Reason and signal processing, to obtain the beat pulse information of irradiated artery site.
A kind of pulses measure method based on laser speckle provided in the present embodiment, as shown in figure 3, its working principle is such as
Under:
The beat pulse position that tested organism artery is irradiated first with laser alignment, forms laser speckle optical path,
The size and distribution of laser speckle are adjusted by light beam shaping module；Area-of-interest is selected, using imaging sensor to pulse
The laser speckle image at bounce position is imaged and is acquired in real time, and continuous pulse speckle image, and imaging lens pair are recorded
The size and clarity that speckle is imaged are adjusted, and speckle image information is uploaded to host computer；Then to continuous pulse
Speckle image carries out digital speckle image processing, calculates the correlation between sequential frame image using digital speckle related algorithm, obtains
To the continuous relative displacement of speckle image in time；Pulse signal is filtered into finally by frequency identification and number to handle,
Obtain pulse information.
Compared with prior art, the invention has the following advantages that
1. speckle image is analyzed by the Related Computational Methods of Digital Image Processing the present invention is based on laser speckle principle,
It obtains the relative displacement of the Time Continuous of irradiation area, then processing is filtered etc. to relative displacement signal, so that it may complete arteries and veins
It fights the measurement of signal, has the characteristics that Poul Dorset Sheep, non-destructive testing.
2. the invention avoids with detected material directly contact, and optical detection principle be affected by the external environment it is small,
So having the characteristics that high sensitivity, high reliablity, strong antijamming capability.
3. the present invention using laser speckle technique, has, system is succinct, building is flexible, easy-to-use, has a wide range of application
Feature.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of sphygmus measurement system based on laser speckle characterized by comprising laser module, image capture module, on
Position machine；
The laser module for irradiating beat pulse position, and generates laser speckle；
Described image acquisition module is connect with the laser module, for the laser speckle of the generation to be imaged and adopted
Collection；
The host computer is connect with described image acquisition module, for handling collected speckle image, obtains pulse
The information of bounce.
2. a kind of pulses measure method and system based on laser speckle according to claim 1, which is characterized in that described
Laser module includes laser and light beam shaping module；The laser irradiates beat pulse portion for providing high-coherence light source
Position, and generate laser speckle；The light beam shaping module is for being adjusted light beam.
3. a kind of pulses measure method and system based on laser speckle according to claim 1 or 2, which is characterized in that
Described image acquisition module is also used to for collected speckle image being sent to host computer and by PC control laser module
Instruction is sent to laser module；Described image acquisition module includes imaging sensor and imaging lens；Described image sensor is used
In the laser speckle of generation is imaged and is acquired；The imaging lens are used to that speckle imaging to be adjusted.
4. a kind of pulses measure method and system based on laser speckle according to claim 3, which is characterized in that described
Collected speckle image is handled, wherein processing mode includes Digital Image Processing and signal processing.
5. a kind of pulses measure method and system based on laser speckle according to claim 4, which is characterized in that described
Host computer is one of embedded system, computer.
6. a kind of pulses measure method based on laser speckle, which is characterized in that comprising steps of
S1. beat pulse position is irradiated, and generates laser speckle；
S2. the laser speckle of the generation is imaged and is acquired；
S3. collected speckle image is handled, obtains the information of beat pulse.
7. a kind of pulses measure method based on laser speckle according to claim 6, which is characterized in that the step S1
In further include being adjusted to light beam.
8. a kind of pulses measure method based on laser speckle according to claim 6 or 7, which is characterized in that the step
Rapid S2 further includes that speckle imaging is adjusted.
9. a kind of pulses measure method based on laser speckle according to claim 8, which is characterized in that the step S3
In collected speckle image is handled, wherein processing mode includes Digital Image Processing and signal processing.
10. a kind of pulses measure method based on laser speckle according to claim 9, which is characterized in that the step
Carrying out processing to collected speckle image in S3 is handled by host computer, wherein host computer is embedded system, calculates
One of machine.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114459592A (en) * | 2022-01-21 | 2022-05-10 | 厦门大学 | Laser speckle micro-vibration measurement system and method based on roller shutter CMOS |
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| CN101784227A (en) * | 2007-07-06 | 2010-07-21 | 工业研究有限公司 | laser speckle imaging systems and methods |
| CN104736042A (en) * | 2012-08-01 | 2015-06-24 | 巴伊兰大学 | Method and system for non-invasively monitoring biological or biochemical parameters of individual |
| CN106955092A (en) * | 2017-03-31 | 2017-07-18 | 北京信息科技大学 | A kind of measuring method and equipment of pulse distribution |
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2019
- 2019-06-14 CN CN201910515686.0A patent/CN110101373A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0284248A1 (en) * | 1987-03-27 | 1988-09-28 | Kowa Co. Ltd. | Ophthalmological diagnosis method and apparatus |
| CN101784227A (en) * | 2007-07-06 | 2010-07-21 | 工业研究有限公司 | laser speckle imaging systems and methods |
| CN104736042A (en) * | 2012-08-01 | 2015-06-24 | 巴伊兰大学 | Method and system for non-invasively monitoring biological or biochemical parameters of individual |
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