CN104888293B - Implantable axial-flow type blood pump temperature detection system and method based on fiber bragg gratings - Google Patents
Implantable axial-flow type blood pump temperature detection system and method based on fiber bragg gratings Download PDFInfo
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- CN104888293B CN104888293B CN201510209919.6A CN201510209919A CN104888293B CN 104888293 B CN104888293 B CN 104888293B CN 201510209919 A CN201510209919 A CN 201510209919A CN 104888293 B CN104888293 B CN 104888293B
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- Prior art keywords
- blood pump
- flow type
- fiber grating
- fiber
- grating
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/205—Non-positive displacement blood pumps
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
Abstract
The invention provides an implantable axial-flow type blood pump temperature detection system and method based on fiber bragg gratings. The system comprises a blood pump, the fiber bragg gratings (8), a motor controller (10), a demodulator (14) and a computer (13), wherein the fiber bragg grating (8) is pasted to an axial blood pump flow passage (7); the motor controller (10) and the demodulator (14) are connected with the leading-out ends of the fiber bragg gratings (8); the computer (13) is connected with the demodulator (14) through a data line. The method comprises the steps that the fiber bragg gratings are laid on a brushless motor stator; the fiber bragg gratings are laid in the implantable axial-flow type artificial heart pump; optical fibers are led out of the human body and connected with the demodulator. The implantable axial-flow type blood pump temperature detection system detects the temperature of the implantable axial-flow type blood pump through the fiber bragg gratings, and the compatibility problem caused by introduction of a sensor cannot occur while temperature detection is achieved, so that intelligent detection and control are realized, power consumption of the blood pump is reduced, and the problems existing in implantation of the blood pump are reduced.
Description
Technical field
The present invention relates to temperature detection technology, more particularly to a kind of implantable axial flow type blood pump temperature based on fiber grating
Degree detecting system and method.
Background technology
In recent years, with the shortcoming of heart transplant donors and developing rapidly for department of cardiac surgery, patients with heart failure non-cutting time by
Gradually extend, requirement of the patient to quality of life also more and more higher, therefore sickle pump miscellaneous especially implantable axial flow type
Blood pump increasingly becomes focus, but blood pump also bring along in the course of the work make blood pump and blood heat have it is corresponding affect and
Change.
In blood pump working condition, the maximum reason that temperature is produced is the continuous firing of blood pump motor.
1. the heat that the iron loss copper loss that blood pump permanent magnetic brushless coil causes is distributed can be in blood pump inwall this layer
Between medium pass to blood inside blood pump runner, cause blood heat to produce change；
2., when impeller runs up, the friction of sliding bearing on wheel shaft is also resulted in and flows through blood pump blood heat change；
3. the material of blood pump runner inner surface and smoothness and blood pump impeller, the material of guide wheel, the same viscosity of smoothness
Under blood temperature change that the friction under streamed is brought.
Temperature change affect for Homoiotherm maximum be life entity erythrocyte, erythrocyte be sustain life it is most heavy
One of cell wanted, it has various important physiological functions, and in addition to portability oxygen and transport carbon dioxide, material turns
Fortune, information transmission, cellular immunization are also relied on erythrocyte.As can be seen here, erythrocyte is extremely important in maintaining weighing apparatus state in vivo to play
Effect, used as hemoglobin and an important allosteric factor of erythrocyte, its minor variations can cause from blood red egg temperature
White molecular structure, concentration, function are so that the form of erythrocyte, structure, function are significantly changed.
As described above, blood pump blood heat detection seems important all the more.And existing temperature sensor variety classes characteristic
Also inconsistent, thermocouple sensor precision is medium, and response speed is slow, though RTD sensor precision is high expensive, numeral and
Simulation output IC temperature sensor response speed is slow, is disturbed impact greatly, while these sensors are required for being powered.Therefore, have
It is necessary to find the alternative sensor that overcome this kind of temperature sensor disadvantage.
The content of the invention
The technical problem to be solved is：A kind of implantable axial flow type blood pump temperature based on fiber grating is provided
Detecting system and method, to solve the defect of above-mentioned prior art.
The present invention solves its technical problem and adopts following technical scheme：
The implantable axial flow type blood pump system for detecting temperature based on fiber grating that the present invention is provided, which includes：Blood pump, glues
The fiber grating of blood pump shaft orientation flowing channel is affixed on, the electric machine controller that is respectively connected with fiber grating exit, (FBG) demodulator, Yi Jitong
Cross the computer that data wire is connected with (FBG) demodulator；The fiber grating has 3, is pasted on the first of shaft orientation flowing channel outer surface respectively
At fiber grating affixed points, the second fiber grating affixed points and the 3rd fiber grating affixed points, they are respectively used to blood pump
Detected at front jocket wheel, impeller and rear guide wheel.
Described fiber grating, which is sealed and draws human body together with the cable same material of the motor of blood pump.
The implantable axial flow type blood pump temperature checking method based on fiber grating that the present invention is provided, which utilizes above-mentioned base
Realize in the implantable axial flow type blood pump system for detecting temperature of fiber grating, its step includes：
Step 1：Fiber grating is laid on brushless motor stator
The stator coil of brushless electric machine is wound on cylinder shape stator, then fiber grating is entered along the fluting on stator
Walking line and extraction；
Step 2：The laying of implantable axial flow type artificial heart pump's fiber grating
Bragg grating is embedded in an optical fiber, the compact and accurate of fiber grating is made full use of, is gone here and there on an optical fiber
Join multiple gratings and make optical fibre optical grating sensing array, be arranged in front jocket wheel, the impeller shaft orientation flowing channel corresponding with rear guide wheel
Outer surface, be in line distribution, it is to avoid fiber kinks, damage optical fiber；
Step 3：Optical fiber is drawn human body and accesses (FBG) demodulator
The cable for being laid on the optical fiber and permanent magnetic brushless of the outer surface of blood pump shaft orientation flowing channel is drawn into human body together, its
The exit of middle cable accesses power supply and electric machine controller, the exit of optical fiber accesses (FBG) demodulator, by (FBG) demodulator obtaining
Wavelength is converted into the corresponding signal of telecommunication with the optical signal of the corresponding relation of temperature, and using temperature inside Real time vision blood pump
Degree situation of change.
In above-mentioned steps 1, it is being close to get through hole at the 1mm of blood pump shaft orientation flowing channel outer surface apart from stator, for optical fiber
Draw.
Described through-hole aperture is 1mm.
The present invention has the advantages that following main compared with prior art：
Using fiber-optic grating sensor, its transducing head structure is simple, small volume, and the combination of optical fiber, low-loss, Spectral Properties
Property it is good, reliability is high, at the same have it is anticorrosive, the characteristics of electromagnetism interference.In addition piece optical fiber of fiber-optic grating sensor can be with
Multiple optical grating constitution sensor arrays are write, the characteristics of using fiber grating " a line multiple spot, distribution measuring ", real-time detection is implantable
Temperature in axial-flow type artificial heart pump's pump.
Using the silica fibre under room temperature, the temperature control of optical fiber Bragg raster is 7.2 × 10-6/℃.For 1.3nm
Serial grating, the grating wavelength drift that unit temperature change causes is 1300 × 7.2 × 10-6=0.0094nm/ DEG C, i.e.,
0.0094nm/℃.Sensitivity is high, little to the detection error of temperature.
The present invention detects implantable axial flow type artificial heart pump temperature using fiber grating, while temperature detection is realized
Consistency problem will not be brought because sensor is introduced again, to reach Intelligent Measurement and control, optical fiber is unified with brushless electric machine optical cable
Encapsulation draws human vitronectin with using cable packing wire made by the material compatible with human body.
Description of the drawings
Fig. 1 is a kind of structural representation of the implantable axial flow type blood pump system for detecting temperature based on fiber grating.
Fig. 2 is that fiber grating pastes distribution and optical fiber draws human body schematic diagram together with brushless electric machine electric wire.
In figure：1. blood pump entrance；2. front jocket wheel；3. impeller；4. permanent magnetic brushless；5. guide wheel after；6. blood pump outlet；7.
Shaft orientation flowing channel；8. fiber grating；9. the first fiber grating affixed points；10 electric machine controllers；11. second fiber grating affixed points；
12. the 3rd fiber grating affixed points；13. computers；14. (FBG) demodulators；15. brushless electric machine cables.
Specific embodiment
The present invention provides a kind of implantable axial flow type blood pump system for detecting temperature and method based on fiber grating, the system
The temperature of implantable axial flow type artificial heart pump's runner outer surface is detected using fiber-optic grating sensor, the temperature of blood pump blood is realized
Spend detection and the detection of blood pump working condition and feed back to user interface, compared with existing blood pump is detected, using optical fiber light
Grid are pasted onto blood pump runner outer surface, lay fiber-optical grating temperature sensor to blood pump front jocket wheel, rear guide wheel and impeller, pass through
(FBG) demodulator, finally carries out data conversion and is displayed in user interface.Find that this in blood pump detection is at this stage by inspection information
The new application direction of one new research direction and fiber grating.
With reference to embodiment and accompanying drawing, the invention will be further described, but does not limit the present invention.
Implantable axial flow type blood pump system for detecting temperature of the embodiment 1. based on fiber grating
The implantable axial flow type blood pump system for detecting temperature based on fiber grating that the present embodiment is provided, such as Fig. 1 and Fig. 2 institutes
Show, including：Blood pump, is pasted on the fiber grating 8 of blood pump shaft orientation flowing channel 7, the motor control being respectively connected with 8 exit of fiber grating
Device processed 10, (FBG) demodulator 14, and the computer 13 being connected with (FBG) demodulator 14 by data wire.
The blood pump is axial-flow type artificial heart pump, and studies in China is mainly at nearly 20 years, larger with external gap, is existing
Technology, its be provided with inner chamber and with the inner chamber separate with import and export shaft orientation flowing channel 7 housing, be mounted in shaft orientation flowing channel 7
The front jocket wheel 2 that is arranged in order from left to right, impeller 3, rear guide wheel 5, fill permanent magnetic brushless 4 in the lumen.
The fiber grating 8, has many, and which is by sealing with blood pump motor cable same material and drawing people together
Body.The present embodiment provides 3 fiber gratings for being pasted on 7 outer surface of shaft orientation flowing channel, is pasted positioned at the first fiber grating respectively
The fiber grating of the 9, second fiber grating affixed points 11 of point and the 3rd fiber grating affixed points 12, they are respectively used to blood pump
Detected at front jocket wheel 2, impeller 3 and rear guide wheel 5, be not limited to this stickup.
The electric machine controller 10 adopts common brushless motor controller, by electronic commutator, single-chip microcomputer governor circuit, limit
Fast circuit, hall signal detection circuit, undervoltage detection circuit and protection circuit composition, are powered by external power source and supply brushless electricity
Running of the machine controller to brushless electric machine carries out steady Control for Speed Limitation.
The (FBG) demodulator 14 adopts SM130 (FBG) demodulators, SM130 is that one high-power, high speed, the measurement system of multisensor
System, predominantly mechanics Application in Sensing are improved.MicronOptics patented technology tuning wavelength scan lasers have been used,
SM130 has high power short scan（Reach as high as 2KHz）, it is a perfect system, with scan-type light source, by 4
Detector can measure the optical signal that every fiber reflection is returned simultaneously.
The computer 13, (FBG) demodulator 14 is obtained wavelength with the corresponding relation of temperature using temperature compensation algorithm process by which
Afterwards, blood pump internal temperature situation of change is shown in real time.
The above-mentioned implantable axial flow type blood pump system for detecting temperature based on fiber grating that the present invention is provided, its course of work
It is：The job analysis of the invention are carried out using the sensing principle of fiber grating.Human body move or feel not quite the thing when
Wait, 2 front jocket wheels are carried out using fiber grating detecting system, 3 impellers, after 5, the blood pump temperature detection of guide wheel is speculating blood heat
And the working condition of blood pump.In optical fiber grating sensing, as sensing amount is to Wavelength-encoding, using wider broadband and stronger
Output and stability LED light source to meet the needs of multiple spot many reference amounts measurement in distributed sensing system, need not supply
Electricity, incides the broadband light of Fiber Bragg Grating FBG after bonder, using the effective refractive index and grating week of fiber grating
The sensitivity characteristic of phase parameter to external world, the change transitions by blood pump temperature are the movement of its bragg wavelength, so as to through 14 solutions
Demodulating apparatus, by detecting that the measurement to blood pump temperature is realized in the centre wavelength movement of optical grating reflection, while pass through 13 data acquisitions
System carries out data-optimized process so as to feed back to display interface.
Implantable axial flow type blood pump temperature checking method of the embodiment 2. based on fiber grating
The method is the implantable axial flow type artificial heart pump's temperature detection based on fiber grating provided using embodiment 1
What system was realized, its step includes：
Step 1：Brushless motor stator is carried out fluting to be easy to lay fiber grating
The stator coil of brushless electric machine is wound on cylinder shape stator, and the cabling needs of a fiber grating are needed through stator
Fluting is carried out to stator could draw optical fiber.Hole, aperture are got through being close at the 1mm of heart pump runner outer surface away from stator
For 1mm.
Step 2：The laying of implantable axial flow type artificial heart pump's fiber grating
The laying characteristic of the implantable axial flow type artificial heart pump fiber grating is the distribution measuring of a line multiple spot, i.e.,
Laying situation of the fiber grating in heart pump outer surface.
The laying of implantable axial flow type artificial heart pump's fiber grating, its method is：Bragg grating is embedded in into a light
In fibre, the compact and accurate of fiber grating is made full use of, multiple gratings of can connecting on an optical fiber, as shown in Fig. 2 be connected on
Optical fibre optical grating sensing array made by a piece optical fiber, is arranged in the corresponding blood pump of front jocket wheel 2, impeller 3 and rear guide wheel 8
Runner outer surface, be in line distribution, can avoid fiber kinks, damages optical fiber.
Step 3：Optical fiber is drawn human body and accesses (FBG) demodulator
Optical fiber is drawn outside human body together with 4 cable of permanent magnetic brushless in the blood pump pump housing, without the need for extra process and increasing
Plus wound area, cable access power supply and electric machine controller, then by intelligent acess (FBG) demodulator 14, by (FBG) demodulator, 14 obtain
Wavelength and the optical signal of the corresponding relation of temperature be converted into the corresponding signal of telecommunication, and shown in blood pump in real time using computer 13
Portion's temperature variations.
Claims (5)
1. the implantable axial flow type blood pump system for detecting temperature based on fiber grating, it is characterised in that include：Blood pump, is pasted on blood
The fiber grating (8) of pump shaft orientation flowing channel (7), the electric machine controller (10) being respectively connected with fiber grating (8) exit, (FBG) demodulator
(14) computer (13), and by data wire being connected with (FBG) demodulator (14)；Fiber grating (8) have 3, paste respectively
The first fiber grating affixed points (9), the second fiber grating affixed points (11) and the 3rd optical fiber light in shaft orientation flowing channel (7) outer surface
Grid affixed points (12) place, they are respectively used to the front jocket wheel to blood pump (2), impeller (3) and rear guide wheel (5) place and detect.
2. implantable axial flow type blood pump system for detecting temperature according to claim 1, it is characterised in that described optical fiber light
Grid (8), which is sealed and draws human body together with the cable same material of the motor of blood pump.
3. the implantable axial flow type blood pump temperature checking method based on fiber grating, it is characterised in that using 1 or 2 institute of claim
What the implantable axial flow type blood pump system for detecting temperature stated was realized, its step includes：
Step 1：Fiber grating is laid on brushless motor stator
The stator coil of brushless electric machine is wound on cylinder shape stator, fiber grating is entered into walking along the fluting on stator then
Line and extraction；
Step 2：The laying of implantable axial flow type artificial heart pump's fiber grating
Bragg grating is embedded in an optical fiber, the compact and accurate of fiber grating is made full use of, is connected on an optical fiber many
Individual grating makes optical fibre optical grating sensing array, is arranged in the corresponding axial direction of front jocket wheel (2), impeller (3) and rear guide wheel (8)
The outer surface of runner (7), be in line distribution, it is to avoid fiber kinks, damages optical fiber；
Step 3：Optical fiber is drawn human body and accesses (FBG) demodulator
The cable for being laid on the optical fiber and permanent magnetic brushless (4) of the outer surface of blood pump shaft orientation flowing channel (7) is drawn into human body together,
Wherein the exit of cable accesses power supply and electric machine controller, and the exit of optical fiber accesses (FBG) demodulator (14), by (FBG) demodulator
(14) wavelength for obtaining and the optical signal of the corresponding relation of temperature are converted into the corresponding signal of telecommunication, and it is real using computer (13)
When show blood pump internal temperature situation of change.
4. the implantable axial flow type blood pump temperature checking method based on fiber grating according to claim 3, its feature exist
In step 1, it is being close to get through hole at the 1mm of blood pump shaft orientation flowing channel (7) outer surface apart from stator, for the extraction of optical fiber.
5. the implantable axial flow type blood pump temperature checking method based on fiber grating according to claim 4, its feature exist
In described through-hole aperture be 1mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510209919.6A CN104888293B (en) | 2015-04-28 | 2015-04-28 | Implantable axial-flow type blood pump temperature detection system and method based on fiber bragg gratings |
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| CN201510209919.6A CN104888293B (en) | 2015-04-28 | 2015-04-28 | Implantable axial-flow type blood pump temperature detection system and method based on fiber bragg gratings |
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| CN104888293B true CN104888293B (en) | 2017-03-22 |
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| CN109789253B (en) * | 2016-09-23 | 2021-08-27 | 心脏器械股份有限公司 | Blood pump with sensor on surface of shell |
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| DE102018201030A1 (en) | 2018-01-24 | 2019-07-25 | Kardion Gmbh | Magnetic coupling element with magnetic bearing function |
| DE102018206754A1 (en) | 2018-05-02 | 2019-11-07 | Kardion Gmbh | Method and device for determining the temperature at a surface and use of the method |
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| DE102018211327A1 (en) | 2018-07-10 | 2020-01-16 | Kardion Gmbh | Impeller for an implantable vascular support system |
| CN110841123A (en) * | 2019-12-23 | 2020-02-28 | 张瑞娟 | Blood circulation device for cardiovascular treatment |
| DE102020102474A1 (en) | 2020-01-31 | 2021-08-05 | Kardion Gmbh | Pump for conveying a fluid and method for manufacturing a pump |
| US11699551B2 (en) | 2020-11-05 | 2023-07-11 | Kardion Gmbh | Device for inductive energy transmission in a human body and use of the device |
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