CN110025300B - Vital sign monitoring device and method based on DFB fiber laser sensing technology - Google Patents
Vital sign monitoring device and method based on DFB fiber laser sensing technology Download PDFInfo
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- 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
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- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
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Abstract
The invention relates to the technical field of optical fiber sensing, in particular to a device for monitoring basic vital sign parameters of a human body on line based on DFB optical fiber laser sensing technology; the monitoring device comprises a DFB fiber laser sensor module, a detection and identification module, a monitoring algorithm module and a display notification module; the output end of the DFB fiber laser sensor module is connected with the input end of the detection identification module, the output end of the detection identification module is connected with the input end of the monitoring algorithm module, and the output end of the monitoring algorithm module is connected with the input end of the display notification module; the DFB optical fiber laser sensor module and the display notification module are connected with a monitored object. The scheme is simple and feasible, the cost is economical, and the vital sign monitoring device and the method have extremely high sensitivity and stability in the aspect of monitoring basic vital sign parameters (heart rate, respiration and body movement) of a human body.
Description
Technical Field
The invention relates to the technical field of optical fiber sensing, in particular to a device for monitoring basic vital sign parameters of a human body on line based on a DFB (distributed feedback) optical fiber laser sensing technology.
Background
According to the statistical data of the World Health Organization (WHO), cardiovascular and cerebrovascular diseases are at the top of various causes of death, and are the genuine first-class human health killers. At present, the technology of monitoring basic vital sign parameters (heart rate, respiration, body temperature and body movement) of a human body by using an optical fiber sensor is rapidly developed, and has great significance for monitoring, preventing, diagnosing and judging cardiovascular diseases.
Fiber Grating sensors (such as L. Dziudaet al, "Monitoring response and Cardiac Activity Using Fiber Bragg Grating-Based Sensor," in IEEE Transactions on biological Engineering, vol. 59, No. 7, pp. 1934-; fiber optic Interferometric sensors (e.g., S. Š prager and D. Zazula, "Heartspot and resolution Detection From Optical Signals by Using a multimeted Approach," inIEEE Transactions on Biomedical EngineeringVol. 59, No. 10, pp. 2922-2929, oct. 2012), the optical interferometry is expensive to acquire a coherent light source and the signal processing technique is complicated, although it has high efficiency and high precision; the microbend optical fiber sensor (such as US20130109931a1, CN 102573615B) appearing in recent years has the advantages of simple system, low cost and obvious advantages for detecting basic vital signs (heart rate, respiration and body movement) of a human body, but the microbend optical fiber sensor has relatively insufficient sensitivity.
The DFB fiber laser is used as a sensor, has small volume, simple structure, easy wavelength division multiplexing, uncomplicated detection technology and very high detection sensitivity.
Accordingly, the present inventors have made extensive studies on the above problems, and as a result, the present invention has been made.
Disclosure of Invention
The invention aims to provide a vital sign monitoring device and a vital sign monitoring method based on a DFB optical fiber laser sensing technology, which are simple and easy in scheme, economical in cost and extremely high in sensitivity and stability in the aspect of monitoring basic vital sign parameters (heart rate, respiration and body movement) of a human body.
In order to achieve the purpose, the invention adopts the following technical scheme:
a vital sign monitoring device based on DFB fiber laser sensing technology comprises a DFB fiber laser sensor module, a detection and identification module, a monitoring algorithm module and a display notification module;
the output end of the DFB fiber laser sensor module is connected with the input end of the detection identification module, the output end of the detection identification module is connected with the input end of the monitoring algorithm module, and the output end of the monitoring algorithm module is connected with the input end of the display notification module;
the DFB optical fiber laser sensor module and the display notification module are connected with a monitored object.
Furthermore, the DFB fiber laser sensor module mainly comprises three parts, namely a pump light source, a WDM coupler and a DFB grating;
the WDM coupler has its forward input end connected to the pump light source and its reverse input end connected to the DFB grating;
the pumping light source consists of a semiconductor laser and generates pumping laser;
the pump laser is transmitted to the WDM coupler through the single mode fiber, and the WDM coupler transmits the pump laser to the DFB grating.
Furthermore, a grating with phase shift is carved on the DFB grating, and the DFB grating is doped with rare earth gain medium Er ions.
Further, the pump laser is 980nm pump laser.
A monitoring method of a vital sign monitoring device based on DFB fiber laser sensing technology comprises the following steps:
the DFB optical fiber laser sensor module transmits the basic vital sign signals of the collected monitored object to the detection and identification module for biological identification, and the identity identification and monitoring requirements of the monitored object are met;
the monitoring algorithm module automatically analyzes the signals and judges the health condition of the monitored object; the processed and diagnosed information is displayed to the user terminal in real time by a display notification module, and a corresponding prompt notification is made;
the pump laser is transmitted to the WDM coupler through the single-mode fiber, and the WDM coupler transmits the pump laser to the DFB grating;
the pumping light source is used for generating pumping laser;
the WDM coupler has its forward input end connected to the pump light source and its reverse input end connected to the DFB grating;
the WDM coupler transmits the pump laser to the DFB grating, the signal laser selected by the DFB grating is reflected and transmitted, and the WDM coupler outputs the signal laser to the detection and identification module through the WDM coupler;
the single mode optical fiber is used as a transmission medium of light;
a detection and identification module which mainly comprises a photoelectric detector function and carries out biological identification corresponding to the generated ballistocardiogram signal so as to identify different ID identities; different breathing, heartbeat and body movement cause the DFB grating to generate different wavelength drift and different laser intensity signals; the detection and identification module converts different laser intensity signals into digital electric signals;
the monitoring algorithm module carries out mode recognition on the acquired ballistocardiogram signal, automatically judges the characteristics of the vital sign signal generated by the subject, and realizes monitoring prevention and diagnosis on the basic vital sign parameters of the human body, including recognition of different ID identities;
and the display notification module provides real-time dynamic display of human body basic vital sign data and displays diagnosis judgment information and alarm signals.
Furthermore, gratings with phase shift are engraved on the DFB grating, and the DFB grating is doped with rare earth gain medium Er ions;
the DFB grating is used for selecting the laser wavelength excited by the gain medium to be 1550nm, reflecting the selected laser wavelength to the WDM coupler at 1550nm, and transmitting the laser wavelength to the single-mode optical fiber for output through the WDM coupler;
the refractive index and the grating length of the DFB grating can be changed by external vibration and vibration change, and further wavelength drift and laser intensity change occur when the wavelength of the laser selected by the DFB grating is 1550 nm;
therefore, the DFB grating is detected at the single mode fiber by signal laser light generated by external vibration and temperature change.
Further, the basic vital sign signal is heart rate, respiration or body movement.
The invention has the beneficial effects that:
after the technical scheme is adopted, the vital sign monitoring device can monitor activity signals such as heart rate, respiration and body movement for a long time. Because the DFB fiber laser sensor has a Bragg reflector structure with phase shift, different output wavelength drift and output light intensity change can be brought by different small vibration changes. The tested person is in different body states (such as sitting, lying on side and lying on back) to generate different vibration signals to influence the output light of the DFB fiber laser. And determining the heart rate change, the respiration change and the body movement of the human body according to the wavelength drift change and the light intensity change.
DFB fiber laser sensor has improved the sensitivity of monitoring. The detection identification module identifies different monitoring objects, and the monitoring pertinence and reliability are improved. The real-time display module improves the real-time performance of medical monitoring. In addition, the DFB optical fiber laser sensor has the advantages of low cost, stability, high efficiency, small volume, uncomplicated integral optical path structure and easy manufacture.
Drawings
FIG. 1 is a block diagram of an overall monitoring device system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a DFB fiber laser sensor according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating an exemplary monitoring device according to an embodiment of the present invention;
FIG. 4 is a flow chart of a monitoring method according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Example one
Fig. 1 shows a block diagram of a monitoring device based on a DFB fiber laser sensing technology according to an embodiment of the present invention. As shown in fig. 1, the DFB fiber laser sensing and monitoring device includes a DFB fiber laser sensor module 101, a detection and identification module 102, a monitoring algorithm module 103, and a display notification module 104.
The output end of the DFB fiber laser sensor module 101 is connected with the input end of the detection and identification module 102, the output end of the detection and identification module 102 is connected with the input end of the monitoring algorithm module 103, and the output end of the monitoring algorithm module 103 is connected with the input end of the display notification module 104;
the DFB fiber laser sensor module 101 and the display notification module 104 are connected to the monitoring target 105. The DFB fiber laser sensor module 101 collects basic vital sign signals (heart rate, respiration, body movement) of the monitored object, and transmits the signals to the detection and identification module 102 for biological identification, thereby completing the identity identification and monitoring requirements of the monitored object. The monitoring algorithm module 103 contains an intelligent algorithm, and can automatically analyze signals and judge the health condition of a monitored object. The processed and diagnosed information is displayed to the user terminal in real time by the display notification module 104, and a corresponding prompt notification is made.
Referring now to fig. 2, fig. 2 shows a schematic diagram of the structure of a DFB fiber laser sensor module 101. The DFB fiber laser sensor module 101 mainly comprises three parts, namely a pump light source 201, a WDM coupler 202 and a DFB grating 203. The pump light source 201 is composed of a semiconductor laser and generates pump laser light 980 nm. The pump laser light is transmitted to the WDM coupler 202 through a single mode optical fiber, and the WDM coupler 202 transmits the pump laser light to the DFB grating 203. The DFB grating 203 is inscribed with a grating with a phase shift and the DFB grating 203 is doped with rare earth gain medium Er ions. The DFB grating selects laser wavelength lambda 1550nm excited by the gain medium, reflects the selected laser wavelength lambda 1550nm to the WDM coupler 202, and transmits the laser wavelength lambda 1550nm to the single-mode fiber 204 through the WDM coupler 202 for output. The changes in the external vibration 205 and the vibration 206 change the refractive index and the grating length of the DFB grating 203, and thus the wavelength shift and the laser intensity change occur at the laser wavelength λ 1550nm selected by the DFB grating 203. Therefore, the signal laser generated by the DFB grating 203 subjected to vibration 205 and temperature 206 changes can be detected at the single mode fiber 204.
Example two
The invention relates to a monitoring method embodiment of a vital sign monitoring device based on DFB optical fiber laser sensing technology;
the DFB fiber laser sensor module 101 transmits the basic vital sign signals of the collected monitored object 301 to the detection and identification module 102 for biological identification, so as to complete the identity identification and monitoring requirements of the monitored object 301;
the monitoring algorithm module 103 automatically analyzes the signal and judges the health condition of the monitored object 301; the processed and diagnosed information is displayed to the user terminal in real time by the display notification module 104, and a corresponding prompt notification is made;
the pump laser light is transmitted to the WDM coupler 202 through the single mode fiber 204, and the WDM coupler 202 transmits the pump laser light to the DFB grating 203;
the pumping light source 201 is used for generating pumping laser;
a WDM coupler 202 whose forward input terminal is connected to the pump light source 201 and whose reverse input terminal is connected to the DFB grating 203;
the WDM coupler 202 transmits the pump laser to the DFB grating 203, the signal laser selected by the DFB grating 203 is reflected and transmitted, and the WDM coupler 202 outputs the signal laser to the detection and identification module 102 through the WDM coupler 202;
the single-mode fiber 204 serves as a transmission medium of light;
a detection and identification module 102, which mainly comprises a photoelectric detector function and performs biological identification corresponding to the generated ballistocardiogram signal, thereby identifying different ID identities; different breathing, heartbeat and body movement cause the DFB grating 203 to generate different wavelength shifts and different laser intensity signals; the detection and identification module 102 converts the different laser intensity signals into digital electric signals;
a monitoring algorithm module 103, which performs pattern recognition on the acquired ballistocardiogram signal, automatically judges the characteristics of the vital sign signal generated by the subject, and realizes monitoring prevention and diagnosis of basic vital sign parameters of the human body including recognition of different ID identities;
a display notification module 104 that provides real-time dynamic display of human body basic vital sign data and displays diagnostic decision information and alarm signals.
Furthermore, a grating with phase shift is engraved on the DFB grating 203, and the DFB grating 203 is doped with rare earth gain medium Er ions;
the DFB grating 203 makes the selected laser wavelength excited by the gain medium 1550nm, reflects the selected laser wavelength 1550nm to the WDM coupler 202, and transmits the laser to the single-mode fiber 204 through the WDM coupler 202 for output;
the refractive index and the grating length of the DFB grating 203 can be changed by the change of the external vibration 205 and the vibration 206, and further, the wavelength of the laser selected by the DFB grating 203 is 1550nm, so that wavelength drift and laser intensity change occur;
therefore, the signal laser generated by the DFB grating 203 being subjected to external vibration 205 and temperature 206 change is detected at the single mode fiber 204.
The basic vital sign signal is heart rate, respiration or body movement.
Referring to fig. 3, the single mode fiber 204 outputs the signal laser light to the detection and identification module for optical detection processing.
Since different monitored subjects 301 have different basic vital signs, these correspond to different signal lasers. According to the change of the signal laser, the monitoring algorithm module 103 and the detection identification module 102 complete the functions of identity identification and basic vital sign monitoring diagnosis.
Fig. 4 is a flow chart of a monitoring method of the monitoring device of the present invention. Firstly, the DFB fiber laser sensor collects basic vital sign signals (heart rate, respiration, body movement) of a monitored subject, and in the DFB fiber laser sensor module, the core of the DFB fiber laser sensor is a fiber grating. The basic principle is as follows: when the change of the vital sign signal of the tested human body causes the change of at least one quantity of the period of the grating and the effective refractive index of the grating area, the reflection wavelength of the fiber grating moves, and the original signal of the vital sign can be sensed for the physical quantity of the tested person, such as heartbeat, respiration and the like, by analyzing the size of the wavelength movement.
Then, the detection and identification module carries out biological identification and monitoring demand analysis on the acquired vital sign original signals to obtain heartbeat and respiration signals of the tested person. And then the monitoring algorithm module diagnoses the health information, judges whether the vital signs of the tested person are normal or not and gives a conclusion. And finally, making corresponding notification through a display notification module.
The output wavelength shift and the output light intensity change of the DFB fiber laser sensor can be caused by the tiny vibration change. Therefore, the monitoring device of the invention has obvious advantages in the aspects of accuracy and high efficiency of monitoring the body movement of the human body.
The description and applications of the invention herein are illustrative and are not intended to limit the scope of the invention to the embodiments described above. Variations and modifications of the embodiments disclosed herein are possible, and alternate equivalent various components of the embodiments will be apparent to those skilled in the art. Other variations and modifications of the embodiments disclosed herein may be made without departing from the spirit or essential characteristics of the invention.
Claims (3)
1. The utility model provides a vital sign monitoring devices based on DFB optic fibre laser sensing technique which characterized in that: the monitoring device comprises a DFB fiber laser sensor module (101), a detection identification module (102), a monitoring algorithm module (103) and a display notification module (104);
the output end of the DFB fiber laser sensor module (101) is connected with the input end of the detection identification module (102), the output end of the detection identification module (102) is connected with the input end of the monitoring algorithm module (103), and the output end of the monitoring algorithm module (103) is connected with the input end of the display notification module (104);
the DFB fiber laser sensor module (101) and the display notification module (104) are connected with a monitoring object (105);
the DFB optical fiber laser sensor module (101) transmits the basic vital sign signals of the monitored object (105) to the detection and identification module (102) for biological identification, and the identity identification and monitoring requirements of the monitored object (105) are met;
a detection and identification module (102) which mainly comprises a photoelectric detector function and carries out biological identification corresponding to the generated ballistocardiogram signal, thereby identifying different ID identities; different breathing, heartbeat and body movement cause the DFB grating (203) to produce different wavelength shifts and different laser intensity signals; the detection identification module (102) converts different laser intensity signals into digital electric signals;
the monitoring algorithm module (103) is used for carrying out mode recognition on the acquired ballistocardiogram signals, automatically judging the characteristics of vital sign signals generated by a subject and realizing monitoring, prevention and diagnosis on basic vital sign parameters of a human body;
the monitoring algorithm module (103) automatically analyzes the signals and judges the health condition of the monitored object (105); the processed and diagnosed information is displayed to the user terminal in real time by a display notification module (104) and corresponding prompt notification is made;
a display notification module (104) that provides real-time dynamic display of human body basic vital sign data, and displays diagnostic decision information and alarm signals;
the DFB fiber laser sensor module (101) mainly comprises three parts, namely a pump light source (201), a WDM coupler (202) and a DFB grating (203);
the pumping light source (201) is composed of a semiconductor laser and generates pumping laser;
a WDM coupler (202) with a forward input connected to the pump light source (201) and a reverse input connected to the DFB grating (203); a single mode fiber (204) as a transmission medium for light;
the pump laser is transmitted to the WDM coupler (202) through the single-mode fiber (204), and the WDM coupler (202) transmits the pump laser to the DFB grating (203);
the DFB grating (203) transmits the selected signal laser reflection to the WDM coupler (202) and outputs the signal laser reflection to the detection identification module (102) through the WDM coupler (202).
2. The vital signs monitoring device based on DFB fiber laser sensing technology of claim 1, wherein:
the DFB grating (203) is engraved with a grating with a phase shift, and the DFB grating (203) is doped with rare earth gain medium Er ions.
3. The vital signs monitoring device based on DFB fiber laser sensing technology of claim 1, wherein: the pump laser is 980 nm.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108120525A (en) * | 2017-12-28 | 2018-06-05 | 上海交通大学 | Optical fiber grating temperature/strain sensing system and its demodulation method |
| CN108267160A (en) * | 2017-12-28 | 2018-07-10 | 博立信（北京）科技有限公司 | Time-multiplexed fiber Bragg grating sensor |
| CN108652635A (en) * | 2018-03-27 | 2018-10-16 | 余海波 | medical monitoring device, method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8125648B2 (en) * | 2006-06-05 | 2012-02-28 | Board Of Regents, The University Of Texas System | Polarization-sensitive spectral interferometry |
| CN1888834B (en) * | 2006-08-14 | 2011-09-14 | 北京菲博泰光电科技有限公司 | Optical fiber grating sensor wave length measuring system |
| US8604433B2 (en) * | 2008-05-19 | 2013-12-10 | Emcore Corporation | Terahertz frequency domain spectrometer with frequency shifting of source laser beam |
| CN103392136B (en) * | 2010-12-02 | 2018-02-02 | Ofs飞泰尔公司 | DFB optical-fiber lasers bend sensor and optical heterodyne microphone |
| CN104198433A (en) * | 2014-09-14 | 2014-12-10 | 中国科学院合肥物质科学研究院 | Device and method for detecting concentration of human respiration marking gas on line by laser absorption spectroscopy technology |
| CN106482863B (en) * | 2016-10-12 | 2019-02-01 | 山东省科学院激光研究所 | Temperature sensor and temperature-sensing system based on active phase-shifted grating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108120525A (en) * | 2017-12-28 | 2018-06-05 | 上海交通大学 | Optical fiber grating temperature/strain sensing system and its demodulation method |
| CN108267160A (en) * | 2017-12-28 | 2018-07-10 | 博立信（北京）科技有限公司 | Time-multiplexed fiber Bragg grating sensor |
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