WO2015017998A1 - Fiber grating sensor-based bed for monitoring physiological parameters of human body - Google Patents

Fiber grating sensor-based bed for monitoring physiological parameters of human body

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Publication number
WO2015017998A1
WO2015017998A1 PCT/CN2013/080977 CN2013080977W WO2015017998A1 WO 2015017998 A1 WO2015017998 A1 WO 2015017998A1 CN 2013080977 W CN2013080977 W CN 2013080977W WO 2015017998 A1 WO2015017998 A1 WO 2015017998A1
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WO
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Application
Patent type
Prior art keywords
fiber
bed
sensor
strain
unit
Prior art date
Application number
PCT/CN2013/080977
Other languages
French (fr)
Chinese (zh)
Inventor
黄勃
Original Assignee
Huang Bo
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/02Detecting, 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
    • A61B5/0205Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/02Detecting, 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
    • A61B5/024Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02444Details of sensor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/08Detecting, measuring or recording devices for evaluating the respiratory organs
    • A61B5/0816Measuring devices for examining respiratory frequency
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/68Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6887Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
    • A61B5/6892Mats
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F19/00Digital computing or data processing equipment or methods, specially adapted for specific applications
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0261Strain gauges
    • A61B2562/0266Optical strain gauges

Abstract

A fiber grating sensor-based bed for monitoring physiological parameters of a human body. The bed comprises a bed panel, bed support legs for supporting the bed panel, and fiber grating sensors disposed on the bed support legs. All fiber grating sensors are connected in series through an optical fiber, and the led-out fiber is connected to a photoelectric module and a data processing module. The bed is used for monitoring physiological parameters of a human body such as heart rate, respiratory rate and weight, and can monitor the health state of the human body in real time in a non-interposition way.

Description

Based on the bed FBG sensors for monitoring physiological parameters FIELD

The present invention relates to the field of fiber grating sensor, in particular, relates to the bed is based on fiber Bragg grating sensors for monitoring physiological parameters.

Background technique

Optical fiber sensing technology is accompanied by the development of optical communication technology in the 1970s and developed rapidly, which is a light wave as a carrier medium for the optical fiber, and sensing a new transmission is measured outside the signal sensing technique. The scope of these fiber optic sensors can be divided into three categories: point sensor (such as a fiber optic microbend sensor, an optical fiber Fabry-Perot sensors, fiber Bragg grating sensors, etc.), integral sensors (e.g., fiber optic Michelson interferometer and an optical fiber Mach-Zehnder interferometer instrument), the distributed sensors (such as the use made of the stress Brillouin scattering effect, distributed temperature sensor). As a point sensor, the field of application of the sensing fiber grating has been much attention worldwide, with incomparable advantages over other conventional electrical sensors, mainly: resistance to electromagnetic interference, corrosion-resistant, wide measuring range , to facilitate the laying multiplexing, miniaturization and low maintenance costs.

Under the current market, to be able to monitor physiological parameters (such as the monitoring of physiological parameters respiratory rate, heart rate and weight, etc.) of the household and office demand for healthcare products is quite large. However, the healthcare practice FBG sensors for the non-intrusive security aspects are few, and since the respiratory and heartbeat signals are often mixed together easy, if the general physiological monitoring device parameters, it is difficult to ensure signal quality and long-term monitoring, in addition to the outside temperature is also likely to affect the signal quality.

technical problem

Object of the present invention is to provide a physiological parameter that can be used, such as heart rate, respiratory rate monitoring and measuring the weight of the bed. Bed to the present invention can be used to monitor physiological parameters of the heart rate, respiratory rate, and body weight, etc., the health of the human body can be monitored in real time non-intrusive.

Technology Solutions

In order to achieve the above object, the present invention provides the following technical solution:

Based on fiber Bragg grating sensors for monitoring physiological parameters of the bed, said bed comprising a bed panel, a bed support four leg support bed panel, wherein each of said bed support leg provided a fiber grating strain sensor, all connected by a fiber grating strain sensor an optical fiber in series, the optical fiber is connected to the photovoltaic module and a data processing module; the photovoltaic module LED 16 light source, an optical coupler and the demodulation unit, the LED light source light is emitted from the optical coupler injection fiber grating strain sensor, light is reflected back to meet the condition by the optical coupler into the demodulation unit; said data processing module is located within a monitored host, the host is also connected to a monitor integrated the results show that the platform; data within the data processing module has the sequence over the frequency shift amount calculation means, Gaussian noise removal unit, a pattern recognition unit FBG strain sensor temperature compensation calculation unit, a heart rate calculating unit, the breathing frequency calculation unit, weight calculation means outputs the result to the final combined results show internet.

Beneficial effect

Bed for measuring physiological parameters of the present invention has the technical advantage in the application based on the above technical solution:

1. The bed of the present invention may be non-intrusive real-time monitoring of the health status of the human body.

2. Because people are there eight hours a day in bed, in bed breathing, heartbeat relatively stable, helping improve signal quality and long-term monitoring.

3. The present invention can also take into account the temperature of the fiber grating strain sensor drift of the center wavelength of reflection, for the placement of a fiber grating temperature sensor is a strain sensor in each fiber grating, used for temperature compensating fiber grating strain sensor shadow ah, improve the detection accuracy.

4. As the fiber grating sensor itself is electrically inactive and thus does not produce any electrical damage to the body lying in bed, safety performance is very prominent.

BRIEF DESCRIPTION

1 schematic block diagram of the present invention.

Preferred embodiment of the present invention.

To make the objectives, technical solutions and advantages of the present invention will become more apparent hereinafter in conjunction with the accompanying drawings and embodiments of the present invention will be further described in detail. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention.

Bed and the bed configuration of the present invention is similar to the prior art, in the shape of a bed structure comprises a panel, a support leg supporting bed for bed panel. Here bed support leg is placed under the floor or ground, the support functions of the entire bed. When the body lying on the bed panel, the back panel rests on the bed.

The bed comprises a bed panel, a bed support four leg support bed panel, wherein said each leg is provided with a bed support fiber grating strain sensor, all via a fiber grating strain sensor fiber connected in series, the fiber optic connector with a data processing module and a photovoltaic module; a photovoltaic module LED 16 light source, optical coupler and the demodulation unit, the light emitted from the LED light source through the optical coupler injection fiber grating strain sensor, reflection condition satisfied the light entering through the optical coupler after being reflected demodulation unit; said data processing module is located within a monitored host, the host is also connected to a monitoring result display integrated platform; data within the data processing module in turn has elapsed frequency shift amount calculating unit Gaussian noise removal unit, a pattern recognition unit FBG strain sensor temperature compensation calculation unit, a heart rate calculating unit, the breathing frequency calculation unit, the weight calculation unit outputs the result to the final combined results show internet.

And the center wavelength of the frequency shift amount calculation unit affected by temperature, the FBG strain sensor strain effect of the optical signal fiber grating strain sensor and the reflected light with the center wavelength of reflected light is calibrated for comparing the difference, the center wavelength of reflected light obtained offset; Gaussian noise removal unit removes a noise signal after the above processing data; pattern recognition means to distinguish heartbeat, breathing and weight signals; FBG strain sensor temperature compensation to the temperature calculating unit strain reflections on the fiber grating sensor center wavelength shift amount of light is removed, leaving only action effect strain; heart rate calculating means, calculating means calculates the respiratory rate heart rate and breathing; weight calculating unit calculates the weight.

The present invention can be utilized to achieve the bed body portion measuring physiological parameters, Bed improved sensor technology and the use of photovoltaic technology, particularly the improvement comprising: the fiber grating strain sensor provided bed support legs, through fiber grating strain sensor an optical fiber connected in series, the above-described lead out from one end of the optical fiber, drawn fiber is connected to a data processing module and a photovoltaic module. The above fiber grating strain sensor can detect the amount of deformation of the deformable body lying on the bed, and the amount of deformation and the change of the detection signal after the laser into an electrical signal after photoelectric conversion processing, whereby the modification is known based on the calculation reason, the deformation due to recombination, a partial measure physiological parameters, in addition to the physiological parameters body weight, and further comprises a respiratory rate heartbeat frequency.

Each of the support legs of the bed is provided with a fiber grating strain sensor, the four support legs is provided with four FBG strain sensor, a strain sensor mounted four such purpose is to increase the sensitivity and detection accuracy. Heartbeat and breathing respectively will produce a different amplitude and frequency of the force on the back, they are applied to the four strain sensor, so that they produce an axial strain, such that the central wavelength of the reflected light from the fiber grating strain sensor bias occurs shift. Heartbeat and breathing induced fiber grating the reflected light of the center wavelength of the strain sensor frequency shift is different, and therefore the amount of frequency shift of the frequency of reproduction is different, and therefore according to this rule, the strain sensors may be used to measure human heart rate and respiration frequency and other physiological parameters.

When bed began, when compared with no bed, the entire weight of the human body will be in the FBG strain on the highest point of the arcuate configuration of the sensor, it will produce a fiber grating strain sensor axial strain, fiber grating strain sensor leads to the center wavelength shift of reflected light, a linear relationship between an offset from the body weight, the greater the heavier the weight of the offset, and vice versa.

In the bed for measuring physiological parameters of the present invention, due to the presence of body temperature, it will inevitably affect the fiber grating strain sensor, and thus will affect the accuracy of the measurement. To reduce the adverse effects of the temperature sensor is brought to the FBG strain, we provided near each fiber grating strain sensor is a fiber grating temperature sensor, in order to measure the influence of temperature on the strain, considering these effects in the calculation, the temperature effect removed. DETAILED temperature compensation process monitoring host runtime implemented FBG strain sensor temperature compensation calculation unit.

In a specific configuration of the bed, each of the plurality of optical sections through an optical fiber grating sensor into connection. Photovoltaic modules, to monitor the host and integrated results are shown connected between the cable internet, in addition to all hardware components are connected by optical fibers. Photovoltaic module built LED light source, optical coupler and the demodulation unit. After the light is emitted from the broadband light source optical coupler injection FBG sensor, the light is reflected to meet the conditions, and then through the optical coupler into the demodulation means demodulates a central wavelength of the reflected light at each fiber Bragg grating sensors. And then converting it into an electric signal, and transmitted to the monitoring host.

1, the monitoring host built data acquisition module and the data processing module. Data acquisition module for acquiring data and the A \ D converter. Monitoring host data processing module is the core of which comprises six unit modules: the frequency shift amount calculation means, Gaussian noise removal unit, a pattern recognition unit FBG strain sensor temperature compensation calculation unit, a heart rate calculating unit, the breathing frequency calculation unit, body weight computing unit.

The data of the reflected light from the first data processing module of the photovoltaic module to the respective fiber Bragg grating sensors frequency shift amount calculating means, the frequency shift amount calculation unit affected by temperature, the center wavelength of the reflected light of the effect of strain fiber Bragg grating sensors and nominal center wavelength of reflected light as a difference, to give an offset center wavelength of reflected light. Then, data is then processed to remove noise signals via the Gaussian noise removal unit, such as some of the noise generated by the movement in bed superimposed signal. Then, to distinguish heartbeat, breathing and weight signals via the pattern recognition unit. Then, the shift amount calculating unit strain temperature of the center wavelength of reflected light generated on the sensor and then removing the fiber grating through the optical fiber grating strain sensor temperature compensation, leaving only the action effect of strain. Then, each unit, and respiratory frequency calculation unit weight calculating unit calculates heart rate, respiratory rate and heart rate calculation by weight.

In physiological parameters to be measured, the heart rate is the number of heart beats per minute, is an important diagnosis is based on clinical diagnosis of the doctor. Normal adult heart rate is generally about 60 to 100 beats / min. At the same time heart rate but also because of different age and gender and different. Followed the ups and downs of the chest is a breath, that is, once again inhale exhale. The number of breaths per minute is called respiratory rate, which is also an important diagnosis is based on clinical diagnosis of the doctor. Normal adult respiratory rate is generally about 16 to 18 beats / min. Weight is closely related with some of the parameters of gender, age and height. The final results are to be displayed to the combined results display platform.

Comprehensive results are displayed on the platform, configure the display interface. The user can browse the heart rate, respiratory rate, body weight and the time curve on the display screen directly. Heart rate and respiratory rate measurement once every hour, once a day body weight measured. Users can also browse the display interface to these three physiological parameters in a day, month and curves within a year, so that users better understand the situation over a longer period of physical health changes.

Bed present invention mainly comprises FBG sensors to monitor physiological parameters of the heart rate, respiratory rate, and body weight, etc., the health of the human body can be monitored in real time non-intrusive. People a day are about eight hours sleep in the bed, under the bed so install sensors for real-time monitoring of the health of the human body can be given an initial health evaluation, provide a powerful guarantee for the prevention of disease. In addition, the bed of the present invention will not affect people sleeping comfort, a host device can simultaneously access multiple beds, greatly reducing the cost, and simple maintenance. Thus, the bed of the present invention is suitable for companies and government units to use as a welfare unit employees, the establishment of real-time personal health records for employees.

The above are only preferred embodiments of the present invention but are not intended to limit the present invention, any modifications within the spirit and principle of the present invention, equivalent replacements and improvements should fall in the protection of the present invention within range.

Embodiment of the present invention.

Industrial Applicability

Sequence Listing Free content

Claims (2)

  1. Based on fiber Bragg grating sensors for monitoring physiological parameters of the bed, said bed comprising a bed panel, a bed support four leg support bed panel, wherein each of said bed support leg provided a fiber grating strain sensor, all connected by a fiber grating strain sensor an optical fiber in series, the optical fiber is connected to the photovoltaic module and a data processing module; the photovoltaic module LED 16 light source, an optical coupler and the demodulation unit, the LED light source light is emitted from the optical coupler injection fiber grating strain sensor, light is reflected back to meet the condition by the optical coupler into the demodulation unit; said data processing module is located within a monitored host, the host is also connected to a monitor integrated the results show that the platform; data within the data processing module has the sequence over the frequency shift amount calculation means, Gaussian noise removal unit, a pattern recognition unit FBG strain sensor temperature compensation calculation unit, a heart rate calculating unit, the breathing frequency calculation unit, weight calculation means outputs the result to the final combined results show internet.
  2. According to one of the claim 1 for monitoring a bed based on physiological parameters of the FBG sensor, wherein the frequency shift amount calculation unit affected by temperature, the FBG strain sensor strain effect of the optical signal and the strain sensor wavelength of the reflected light and the center of the calibration center wavelength of reflected light for the fiber grating comparison difference, to give an offset center wavelength of reflected light; Gaussian noise removal unit removing the noise signal from the post-processed data; pattern recognition unit distinguishing heart rate, respiration, and body weight signal; FBG strain sensor temperature compensation means calculating the strain temperature offset center wavelength of reflected light generated in the FBG sensor is removed, leaving only the effect of strain effects; heart rate calculation means calculates the respiratory rate unit calculates heart rate and respiratory rate; weight calculating unit calculates the weight.
PCT/CN2013/080977 2013-08-07 2013-08-07 Fiber grating sensor-based bed for monitoring physiological parameters of human body WO2015017998A1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005253608A (en) * 2004-03-10 2005-09-22 Keio Gijuku Condition analysis apparatus
CN101282686A (en) * 2005-10-11 2008-10-08 皇家飞利浦电子股份有限公司 System for monitoring a number of different parameters of a patient in a bed
US20090185772A1 (en) * 2008-01-22 2009-07-23 General Electric Company Fiberoptic patient health multi-parameter monitoring devices and system
CN102334984A (en) * 2011-07-20 2012-02-01 上海波汇通信科技有限公司 Intelligent chair used for measuring human physiology parameters
CN202191274U (en) * 2011-07-20 2012-04-18 上海波汇通信科技有限公司 Intelligent chair
JP5107519B2 (en) * 2005-12-27 2012-12-26 住友大阪セメント株式会社 State analysis equipment and software program

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005253608A (en) * 2004-03-10 2005-09-22 Keio Gijuku Condition analysis apparatus
CN101282686A (en) * 2005-10-11 2008-10-08 皇家飞利浦电子股份有限公司 System for monitoring a number of different parameters of a patient in a bed
JP5107519B2 (en) * 2005-12-27 2012-12-26 住友大阪セメント株式会社 State analysis equipment and software program
US20090185772A1 (en) * 2008-01-22 2009-07-23 General Electric Company Fiberoptic patient health multi-parameter monitoring devices and system
CN102334984A (en) * 2011-07-20 2012-02-01 上海波汇通信科技有限公司 Intelligent chair used for measuring human physiology parameters
CN202191274U (en) * 2011-07-20 2012-04-18 上海波汇通信科技有限公司 Intelligent chair

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