CN102309315A - Non-contact type optics physiological detection appearance - Google Patents
Non-contact type optics physiological detection appearance Download PDFInfo
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Abstract
The invention belongs to human body physiological characteristics detection technique field; Relate to a kind of non-contact type optics physiological detection appearance; Comprise light source, photographic head, imageing sensor, memorizer, control unit and store diagnosis and treatment database of information memory element and outut device; Light source comprises a plurality of resonant cavity light emitting diodes, and said resonant cavity light emitting diodes can be launched the infrared light of different wave length under the control of control unit, be distributed near the photographic head; The facial PPG signal of the driver that imageing sensor captures under the control of control unit is through being admitted to control unit after the processing of signal separation modulate circuit; Control unit can the reading database cell stores diagnosis and treatment information, and the physiologic information through outut device output driver.The present invention can monitor driver's multiple physiological signal, and low in energy consumption, and volume is little, simple in structure.
Description
Technical field
Patent of the present invention belongs to human body physiological characteristics detection technique field, relates to a kind of optics physiological signal detector that is applicable to that automobile deadlock physiological feature detects.
Background technology
Show that according to healthy department statistics numeral 80% professional driver is because factors such as sitting, diet are irregular, nervous, fatigue are easy to suffer from occupation disease miscellaneous.The Along with people's growth in the living standard, the utilization rate of automobile progressively improves, and people are also increasing to the dependency of automobile, and this has also increased the potential hazard degree to the personnel's of driving a car health status.
Drive a car for a long time, like sitting, anxiety, fatigue, do not have enough sleep, occupational factor such as irregular eating makes the driver suffer from gastropathy easily, scapulohumeral periarthritis, lumbago, cervical vertebra pain, acute cervical sprain, diseases in various degree such as deafness, asthenopia.Under driver's or situation of feeling blue bad at condition of road surface, emotion fluctuates easily, agitation, or meets accident, the just more difficult emotion that draws oneself up, and the disease of aspects such as these all increase the weight of to have a sleepless night easily, anxiety also is prone to cause diseases such as hypertension.In addition, like the long-term sitting of male driver, the space is airtight, and temperature is high, and atmosphere draught-free can influence reproductive performance.
In addition, the long-duration driving automobile also is prone to cause fatigue, distractibility, and the incidence rate of increase accident.Driver's health status is prone to out in the cold, is in relatively independent work activities spatial environments especially for a long time, and is too much fat, lack regular exercise, and the disease that causes owing to diet is irregular can not be ignored.
The multi-parameter physiology detector can more comprehensively reflect the physiological feature under driver's health, the especially fatigue state.Therefore reduce the purpose of road accident rate from keeping fit, should use simple and effective selftest instrument, guarantee healthy and safe driving.
Summary of the invention
The multi-parameter physiology detector that the object of the present invention is to provide a kind of driver's of being applicable to physiological feature to detect can be monitored driver's multiple physiological signal, and low in energy consumption, and volume is little, simple in structure.
A kind of non-contact type optics physiological detection appearance; Comprise a plurality of resonant cavity light emitting diodes, photographic head, imageing sensor, memorizer, control unit and store diagnosis and treatment database of information memory element and outut device; Wherein, Said resonant cavity light emitting diodes can be launched the infrared light of different wave length under the control of control unit, be distributed near the photographic head; Imageing sensor is caught the facial PPG signal of driver under the control of control unit, separate being admitted to control unit after modulate circuit is handled through signal; By the diagnosis and treatment information of storing in the control unit binding data storehouse, driver's PPG signal is carried out facial recognition and skin surface identification, obtain driver's physiologic information, and the output information.
As preferred implementation, the number of described resonant cavity light emitting diodes is evenly distributed on around the photographic head between 50-200; Described optics physiological detection appearance also comprises the temperature and humidity pick off, and the output of temperature and humidity pick off is admitted to control unit; Described physiologic information comprises one or more in driver's heart beating, degree of fatigue, obese degree and the alcohol content.
Apparatus of the present invention can directly externally be installed on any automobile, and convenient in application can be used as car accessories, also can coordinate built-in attached to automotive interior with car manufactures.Compared with prior art, the technique effect that the present invention produced is:
1. this detector can detect driver's obese degree, through detecting photoelectricity volume pulse wave signal, produces pre-alarm, reminds driver's situation of looking after one's health.
2. because the resolution of imageing sensor is very high, obtain various skin reflex light images so can use highest resolution.
3. this detector adopts the even lighting system of auto brightness RCLED, and brightness is high, and power consumption is little, and can adjust illumination automatically according to the reflectance of irradiation skin site, guarantees picture quality.
4. this detector can detect driver's degree of fatigue, through image recognition seizure and artificial intelligence process software, checks driver's real-time health, pays special attention to safety to remind the driver.
5. this detector can detect driver's alcohol content, reminds the careful driving of driver or suspends driving.
6. this detector can carry out facial vision capture, detects driver's age and driving condition.
7. this detector can be measured the interior temperature and humidity of car and the content of carbon monoxide and carbon dioxide, and reminds the driver should note ventilating or the adjustment temperature, and good driving environment reduces the probability of poisoning simultaneously in the maintenance car.
8. the present invention adopts fpga chip, and is low in energy consumption, simple in structure.
9. this device volume is little, and light weight can be applicable in all automobile and means of transport, has contactless and two kinds of measuring methods of contact, also can carry, and uses at any time, has very strong generalization.
Description of drawings
Fig. 1: the hardware core basic structure of this device.
The specific embodiment
Fig. 1 further specifies apparatus of the present invention below in conjunction with hardware configuration.
The present invention is a kind of checkout gear that has the automatic human body own health status of photoelectricity volume pulse wave signal.Referring to Fig. 1; The seizure human body face optical signal that light absorption changes owing to the blood of human body pulsatile change through thermal camera (mainly forming) high-resolution by photographic head, imageing sensor, memorizer, control unit etc.; Be photoelectricity volume pulse wave signal (photoplethysmograph-PPG), obtain human body temperature and blood pressure potential change signal, and this light image signal that will gather is sent in the control unit through filtering, signal separation with after nursing one's health; Analyzing and processing through control unit; Health index accurately is provided, degree of fatigue, early warning information such as alcohol content.Detect data output circuit and can export two kinds of signals of voice and numeral simultaneously.Thereby reduce the probability of fatigue driving, and remind human pilot to note tempering the good condition that keeps health, finally reduce road accident rate.This device is when the driver starts up the car at every turn, starts this device automatically, also can make manually to be provided with this device of startup into.
The concrete structure of the embodiment of the invention is following:
(1) optical imaging device (or being called photographic head)
The present invention adopts the fixture distance, according to fixed installation position qualifier distance.During each the measurement, the user of service is fixed on a certain position such as operating seat, and object distance is just constant so, and skin surface can be imaged onto on the CMOS/CCD imageing sensor of image planes clearly, and the optical imagery amplification is also constant simultaneously.
(2) CCD/CMOS digital image pickup
Adopt the digital image sensor of high-resolution CCD/CMOS; Resolution reaches 600nM～1200nM pixel, and not only power consumption is little, and directly obtains digital image; The various errors of having avoided general video camera signal and format conversion to bring, clear image is stable.
(3) multi-wavelength infrared illumination light source
Adopt (the annular light source illumination of resonant cavity light emitting diodes RCLED (Resonant-Cavity Light-Emitting Diodes) of infrared light RCLED array; About 200 infrared light RCLED are arranged near week in the forward lens barrel of photographic head equably; Guarantee that skin surface can obtain the illumination light of a plurality of directions, farthest shows the reflected light image details of skin.The quantity of RCLED and position make that through illumination photometry and calculating the illumination light intensity in the measuring range reaches according to design distribution, obtain the brightness uniform distribution of whole surface measurements image.
The RCLED function is under the control of control unit, adopts the infrared light irradiation skin of different frequency.Like this, photographic head and imageing sensor can be used for extracting the PPG signal, and be more clear than independent use infrared light, accurately.The another one advantage is that illuminated personnel can not disturbed by infrared light.
(4) control unit and memorizer
Control unit is realized by FPGA; Control unit is on the one hand through sending the square-wave pulse signal control current source of different frequency; Thereby drive the RCLED ring; Make its infrared light that sends different frequency, realize the shooting of video sequence on the other hand through the control figure image-position sensor, thereby collect the PPG signal with contactless mode.The control unit of the embodiment of the invention comprises a field programmable gate array (Field Programmable Gate Array-FPGA).Except control unit, also comprise the DDR2 memorizer and the corresponding D RAM controller of 11 megabit (1Gb), 1 USB2.0 module is used for and computer communication and 1 wireless receiving port.The signal processing that the embodiment of the invention adopted comprises filtering, and signal separates the modulate circuit function to be realized by the FPGA initialization codes.The facial PPG signal of the driver of imageing sensor collection is admitted to control unit through after filtering, decoding and the conditioning.Photographic head, imageing sensor, FPGA, memorizer, database storage unit, these all parts all are embedded on the little circuit board.
The performance of system depend on to a great extent imageing sensor sensitivity (or quantum effectiveness Quantum Efficiency, QE).In general, imageing sensor is more responsive in visible spectrum 400-700nm scope.Because the signal that system will handle is between 600-1200nm, thereby therefore selected pick off preferably has the multiple information that high QE ability good treatment bio signal is comprised.Simultaneously, the pick off of high QE itself is littler to handled informational influence.So different according to the signal that will handle, selected pick off is also different.For being suitable for various demands, in the scope that price allows, will select highly sensitive pick off.
Below in conjunction with concrete function, how the function of making a concrete analysis of this device realizes.At first, infrared camera signals to RCLED through the signal triggering of control system, and these light emitting diode rings are radiated at skin and face, captures the luminous reflectance signal of corresponding frequencies.Through the real-time PPG optical signal that obtains from photographing unit, like forehead, the artificial intelligence software can infer age/degree of fatigue of driver.Promptly through comparing the signal of two close positions, the signal in these two sources differs or postpones greatly more, and the driver is just older/and more tired.When postponing highly significant,, can infer specifically that the driver is youth and fatigue or old and mental status is good through comparing with other bio signal.
The principle of non-contact type reflected P PG signal measurement is following.The model of this acquired signal is to describe incident illumination according to Beer Lambert law (Beer-Lambert) to be mapped to the relation between biological tissue and light-receiving and the transmission.
Wherein, I
iBe the light impingement rate of skin surface, I
0Be the light impingement rate that is penetrated into skin, I
rBe the reflected light rate, I is the light exitance of sending from cell tissue, and light arrives photodetector can be divided into steady component (DC) and transient state part (AC).DC partly comprises reflected light I
rAnd from cell tissue, bone is stablized the light stable that blood etc. sends, and the variation of the light absorption that AC partly representes to cause owing to the blood volume-variation is expressed as thereby the light of cell tissue sends rate I:
I＝I
0exp(-μ
effr)＝I
0exp[-μ
dynamicd(t)-μ
staticm] (1)
Wherein, r is an average distance of measuring skin and infrared camera or measuring device; μ
Dynamic, μ
StaticBe the extinction coefficient of steady component and dynamic part; D (t) and m are that light source is to steady component and dynamic part path distance.
Reflected light rate I
rRelevant with I, promptly meet at right angles and the hypotenuse relation with wireless detector and the position of being surveyed skin.Stablize the reflected light I of ingredient DC
rSignificant.Image light Power Capacity tracing (Imaging photoplethysmograhpy--IPPG) is used for a part of blood fullness rate of remote measurement, can obtain threedimensional model through the multilayer optical physiological models.Same, use the model that a plurality of IPPG models can obtain various desired signals, ECG signal (electrocardiogram), EEG (electroencephalogram).
The concrete software of control unit is embodied as: at first through collect the lightwave signal of needed different frequency from imageing sensor; Then signal is carried out filtering; Signal separates processing such as modulate circuit, and the picture signal after then will handling outputs in the memorizer of store historical data, and application software combines the diagnosis and treatment information in the diagnosis and treatment database of information of preserving simultaneously; The light image signal is analyzed and compared, can obtain tested personnel's condition information.Wherein, the function of the artificial intelligence that software comprises (AI) reasoning, use C language or Matlab language programmed on computers after, write FPGA microcontroller again as control unit.The function of AI comprises derivation user's age, and this is synthetic by the PPG sets of signals that comprises at least two sources, and on the FPGA hardware foundation, realizes this function.Obtain after the conclusion system output information being passed through voice, display circuit and warning system offer the user and store into simultaneously in data base's historical record.
The control unit of present embodiment adopts the FPGA programming to realize, have the software of artificial intelligence (AI) reasoning, to the control of RCLED, shooting etc. all through FPGA programming realization, in practical application, can also adopt the chip microcontroller of DSP or other types.
Substantive features of the present invention are following: 1) this checkout gear can detect the condition signal of human pilot, comprises the blood pressure flow velocity, potential change; Pulse signal; Make the driver can accurately understand self health such as blood pressure, fat content, alcohol content or the like.2) variable signal that the thermal camera signal can capturing facial is to detect the real-time fatigue conditions of human pilot, to reduce road accident rate under the fatigue driving situation.3) the temperature and humidity signal in the compartment can be used as auxiliary signal to keep the quality of air, makes that personnel are in best comfort level environment in the compartment, especially fatigue driving is endangered the insensitive caused safe driving of environmental change.In a word, this infrared image and photoelectricity volume pulse wave signal act on together, and the information warning to human pilot safe driving and self health in all directions is provided.
Claims (4)
1. non-contact type optics physiological detection appearance; Comprise a plurality of resonant cavity light emitting diodes, photographic head, imageing sensor, memorizer, control unit and store diagnosis and treatment database of information memory element and outut device; Wherein, Said resonant cavity light emitting diodes can be launched the infrared light of different wave length under the control of control unit, be distributed near the photographic head; Imageing sensor is caught the facial PPG signal of driver under the control of control unit, separate being admitted to control unit after modulate circuit is handled through signal; By the diagnosis and treatment information of storing in the control unit binding data storehouse, driver's PPG signal is carried out facial recognition and skin surface identification, obtain driver's physiologic information, and the output information.
2. optics physiological detection appearance according to claim 1 is characterized in that, the number of described resonant cavity light emitting diodes is evenly distributed on around the photographic head between 50-200.
3. optics physiological detection appearance according to claim 1 is characterized in that, described optics physiological detection appearance also comprises the temperature and humidity pick off, and the output of temperature and humidity pick off is admitted to control unit.
4. optics physiological detection appearance according to claim 1 is characterized in that, described physiologic information comprises one or more in driver's heart beating, degree of fatigue, obese degree and the alcohol content.
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| CN103714660A (en) * | 2013-12-26 | 2014-04-09 | 苏州清研微视电子科技有限公司 | System for achieving fatigue driving judgment on basis of image processing and fusion between heart rate characteristic and expression characteristic |
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| CN106419863A (en) * | 2016-11-23 | 2017-02-22 | 深圳市维亿魄科技有限公司 | Wristband equipment for monitoring drinking state of human body on basis of pulse wave energy distribution and monitoring method |
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| CN109009011A (en) * | 2018-05-14 | 2018-12-18 | 深圳市深光谷科技有限公司 | A kind of contactless pulse measurement device |
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| CN111387958A (en) * | 2020-03-24 | 2020-07-10 | 张武 | Health detection and analysis system and method for multi-union data |
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| CN104661583A (en) * | 2012-09-21 | 2015-05-27 | 皇家飞利浦有限公司 | Device and method for processing data derivable from remotely detected electromagnetic radiation |
| CN105144199B (en) * | 2013-02-21 | 2019-05-28 | Iee国际电子工程股份公司 | Support occupant's monitoring system based on imaging device of multiple functions |
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| CN106687026A (en) * | 2014-05-12 | 2017-05-17 | 汽车技术国际公司 | Driver health and fatigue monitoring system and method |
| FR3023699A1 (en) * | 2014-07-21 | 2016-01-22 | Withings | METHOD AND DEVICE FOR MONITORING A BABY AND INTERACTING |
| US10441178B2 (en) | 2014-07-21 | 2019-10-15 | Withings | Monitoring device with volatile organic compounds sensor and system using same |
| CN106031631A (en) * | 2015-03-16 | 2016-10-19 | 阿里巴巴集团控股有限公司 | Method, device, and system for heart rate detection |
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| CN108430322A (en) * | 2015-12-21 | 2018-08-21 | 皇家飞利浦有限公司 | Apparatus, method, and computer program product for continuously monitoring vital sign |
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| CN109068991A (en) * | 2016-04-13 | 2018-12-21 | 皇家飞利浦有限公司 | The system and method for skin detection for human subjects |
| CN106073729A (en) * | 2016-05-31 | 2016-11-09 | 中国科学院苏州生物医学工程技术研究所 | The acquisition method of photoplethysmographic signal |
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| CN109009011A (en) * | 2018-05-14 | 2018-12-18 | 深圳市深光谷科技有限公司 | A kind of contactless pulse measurement device |
| CN109009011B (en) * | 2018-05-14 | 2021-12-21 | 深圳市深光谷科技有限公司 | Non-contact pulse measuring equipment |
| CN111387958A (en) * | 2020-03-24 | 2020-07-10 | 张武 | Health detection and analysis system and method for multi-union data |
| CN111387958B (en) * | 2020-03-24 | 2021-02-26 | 钱才英 | Health detection and analysis system for multi-union data |
| CN113854973A (en) * | 2021-09-28 | 2021-12-31 | 广东小天才科技有限公司 | Body temperature measuring method and device, wearable device and storage medium |
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Application publication date: 20120111 |