CN106236035B - A kind of insertion type optical fiber sensing probe - Google Patents
A kind of insertion type optical fiber sensing probe Download PDFInfo
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- CN106236035B CN106236035B CN201610870636.0A CN201610870636A CN106236035B CN 106236035 B CN106236035 B CN 106236035B CN 201610870636 A CN201610870636 A CN 201610870636A CN 106236035 B CN106236035 B CN 106236035B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/03—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs
- A61B5/031—Intracranial pressure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0233—Special features of optical sensors or probes classified in A61B5/00
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- Heart & Thoracic Surgery (AREA)
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- Animal Behavior & Ethology (AREA)
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Abstract
The invention discloses a kind of insertion type optical fiber sensing probes, include at least fibre-optical splice, light signal transduction optical fiber, temperature sensing grating and pressure sensing grating, and fibre-optical splice is produced on one end of light signal transduction optical fiber, for connecting external light source and detection part；Temperature sensing grating and pressure sensing grating are produced on the other end of light signal transduction optical fiber by UV laser exposure or other methods, temperature sensing grating is encapsulated configured with temperature sensing grating, temperature sensing grating is encapsulated as rigidity encapsulation of the thermal expansion coefficient greater than light signal transduction optical fiber, it is quick for being gone to temperature sensing grating progress temperature sensing enhanced sensitivity and pressure sensing, pressure sensing grating is encapsulated configured with pressure sensing grating, for carrying out pressure enhanced sensitivity to pressure sensing grating.The present invention is based on the designs of double Bragg gratings, can be monitored simultaneously to pressure and temperature, eliminate pressure sensing grating and sense effect to the intersection of temperature and pressure, low in cost, production is simple, and monitoring accuracy is high.
Description
Technical field
The invention belongs to photoelectric sensing fields, and in particular to a kind of insertion type optical fiber sensing probe.
Background technique
The temperature and pressure parameter of inside of human body and the health status of human body are closely related.It realizes to pressure in human body and temperature
The reliable monitoring of degree will be helpful to the diagnosis human body state of an illness, mention therapeutic effect.
By taking neurosurgical is treated as an example, intracranial hypertension is the postoperative relatively conventional complication of neurosurgical patients, is
Lead to the postoperative crucial inducement that sb.'s illness took a turn for the worse of neurosurgical patients.Increased intracranial pressure can influence brain blood circulation, lead to perfusion pressure
Decline, cerebral blood flow (CBF) are reduced, and venous return is limited, and encephalic blood is in stagnant, or even causes brain compression, brain displacement, and serious person is formed
Hernia cerebri, patient are often dead due to secondary brain-stem injury.Quickly change in the variation of intracranial pressure, especially short time, often prompts
Conditions of patients deteriorates, if increasing for intracranial pressure can be found in time, actively takes measures to alleviate intracranial pressure, solution causes intracranial pressure
The cause of disease increased can be such that patient pulls through.Therefore, monitoring intracranial pressure can help early stage to clarify a diagnosis and and guide increased intracranial pressure
Early stage processing, this to improve neurosurgical patients, especially Cavity in Critical Patients prognosis be of great significance.In addition, encephalic
The variation of pressure is also associated with encephalic temperature, and mild hypothermia therapy method is pushed away in the treatment of clinical intracranial hypertension
Extensively.
In order to mention the treatment effect of Patients with Neurosurgery, need to carry out real-time monitoring to intracranial pressure and temperature.In order to
Realize the reliable monitoring to intracranial pressure and temperature, the miniature insertion type that pressure, temperature are monitored can be passed by needing to design
Sense probe.Optical fiber sensing technology has the advantages that size is small, electromagnetism interference, can be as insertion type encephalic sensing probe
Preferred embodiment.Wen Hongqiao [application number: 201110308246.1] discloses a kind of micro intracranial multi-parameter based on Fibre Optical Sensor
Sensor senses temperature using fiber Bragg grating technology, is sensed using Fabry-perot optical fiber chamber technology to pressure.
Due to the physical property feature of fiber optic materials itself, fiber bragg grating is lower to the sensitivity of temperature change, it is difficult to realize
High-precision human body temperature measurement.Moreover, fiber bragg grating, which has temperature and pressure, intersects sensing phenomena, further drop
Low temperature detecting precision.In addition, Fabry-perot optical fiber chamber exists, structure is complicated, and Fabrication quality control is difficult, and cost of manufacture height etc. is asked
Topic.
Summary of the invention
The technical problem to be solved by the present invention is to exist for existing fiber Bragg grating to temperature, pressure sensing spirit
Sensitivity is low, and there are problems that temperature, pressure cross sensitivity, provides a kind of insertion type optical fiber sensing probe, based on double Prague
Grating Design can simultaneously be monitored pressure and temperature, and low in cost, production is simple, and monitoring accuracy is high.
Used technical solution is the present invention to solve above-mentioned technical problem:
A kind of insertion type optical fiber sensing probe, include at least fibre-optical splice, light signal transduction optical fiber, temperature sensing grating and
Pressure sensing grating, fibre-optical splice are produced on one end of light signal transduction optical fiber, for connecting external light source and detection part；
Temperature sensing grating and pressure sensing grating are produced on the another of light signal transduction optical fiber by UV laser exposure or other methods
One end, temperature sensing grating are encapsulated configured with temperature sensing grating, and temperature sensing grating is encapsulated as thermal expansion coefficient to be believed greater than light
The rigidity encapsulation of number conduction optical fiber is gone quick for carrying out temperature sensing enhanced sensitivity and pressure sensing to temperature sensing grating, and pressure passes
Photosensitive grid are encapsulated configured with pressure sensing grating, for carrying out pressure enhanced sensitivity to pressure sensing grating.
According to the above scheme, the temperature sensing grating encapsulation uses one section of capillary, covers outside temperature sensing grating, hair
The signal transduction optical fiber rigid bond at tubule both ends and temperature sensing grating both ends.
According to the above scheme, the pressure sensing grating encapsulation is fabricated to U-shaped or arc, the both ends and pressure of U-shaped or arc
The signal transduction optical fiber rigid bond at sensing grating both ends.
According to the above scheme, the indentation, there of the pressure sensing grating encapsulation covers one layer of elastic film, or passes in pressure
The surface of photosensitive grid encapsulation covers the preceding paragraph spring-backed quill (increase pressure experience area).
According to the above scheme, the temperature sensing grating package material is that metal, macromolecule or other thermal expansion coefficients are greater than
The rigid material (such as aluminium alloy) of light signal transduction optical fiber.
According to the above scheme, the pressure sensing grating is encapsulated as the conversion encapsulation that should change direction, for making pressure sensing grating
Axial deformation is generated under the action of transverse pressure.
According to the above scheme, the pressure sensing grating package material is metal, macromolecule or aluminium alloy rigid material.
According to the above scheme, the light signal transduction fibre diameter of the temperature sensing grating region performs etching (to increase temperature
Grating deformation caused by degree changes), the light signal transduction fibre diameter after etching is 20 to 110 μm.
According to the above scheme, the light signal transduction fibre diameter of the pressure sensing grating region performs etching (to increase pressure
Grating deformation caused by power changes), the light signal transduction fibre diameter after etching is 20 to 110 μm.
According to the above scheme, the inside of the other end of the temperature sensing grating close to light signal transduction optical fiber, pressure conduction
Grating is close to the outside of the other end of light signal transduction optical fiber.
The working principle of the invention: probe is in use, using white light source, if Light-emitting diode LED is as the outer of probe
Motivate light source in portion.The optical signal that white light source is issued imports probe.Temperature sensing grating monitors body temperature, and passes to pressure
Photosensitive grid carry out temperature-compensating.Pressure sensing grating monitors internal pressure, and according to the temperature measurement result of temperature sensing grating
Temperature-compensating is carried out to the measurement of pressure sensing grating, to eliminate pressure sensing grating to the intersection sensing effect of temperature and pressure
It answers.Receive the optical signal that temperature sensing grating and pressure sensing optical grating reflection return using Wavelength demodulation module, and to reflectance spectrum
It is differentiated, Wavelength demodulation module changes letter for obtaining the reflectance spectrum of temperature sensing grating and pressure sensing grating respectively
Breath, to further calculate to obtain temperature and pressure data.Temperature sensing grating is packaged for carrying out temperature to temperature sensing grating
Sensing enhanced sensitivity and pressure sensing go it is quick, pressure sensing grating be packaged for pressure sensing grating carry out pressure enhanced sensitivity.
Compared with prior art, the present invention has the following advantages:
1, fiber bragg grating production is simple, low in cost, provides for human body temperature, pressure double parameter real-time monitoring
The solution of high performance-price ratio；
2, pressure sensing grating monitors internal pressure, and according to the temperature measurement result of temperature sensing grating to pressure sensing
The measurement of grating carries out temperature-compensating, senses effect to eliminate pressure sensing grating to the intersection of temperature and pressure；
3, it is low to temperature, pressure sensing sensitivity to solve fiber bragg grating by the present invention, and there are temperature, pressure to hand over
Sensitive issue is pitched, ensure that the reliability of monitoring.
Detailed description of the invention
Fig. 1 is insertion type optical fiber sonde configuration schematic diagram.
Fig. 2 is temperature sensing grating embodiment schematic diagram.
Fig. 3 is pressure sensing grating embodiment schematic diagram.
In figure, 1 fibre-optical splice, 2 signal transduction optical fiber, 3 temperature sensing gratings, 4 pressure sensing gratings, 5 temperature sensing light
Grid encapsulation, the encapsulation of 6 pressure sensing gratings.
Specific embodiment
Below according to specific embodiment and in conjunction with attached drawing, the present invention is described in further detail.
Fiber bragg grating carries out selective reflecting to incident broadband light.Reflected light is narrow band light, and central wavelength is full
Sufficient Bragg's equation, is described as follows:
λB=2neffΛ
Wherein, λBFor optical grating reflection center wavelength of light, neffFor grating effective refractive index, Λ is the grating fringe period.Optical fiber
The reflection center wavelength of light and grating effective refractive index of Bragg grating, grating fringe period are directly proportional.The grating fringe period with
The axial deformation of grating is related.For the enhanced sensitivity of fiber bragg grating, mainly consider to increase fiber grating in environment temperature
Or axial deformation when environmental pressure change.
The overall structure diagram of insertion type fibre-optical probe of the present invention shown in referring to Fig.1.Insertion type optical fiber is visited
Head includes at least fibre-optical splice 1, light signal transduction optical fiber 2, temperature sensing grating 3 and pressure sensing grating 4, and fibre-optical splice 1 is made
Make in one end of light signal transduction optical fiber 2, for connecting external light source and detection part；Temperature sensing grating 3 and pressure pass
Photosensitive grid 4 are produced on the other end of light signal transduction optical fiber 2, temperature sensing grating 3 by UV laser exposure or other methods
Configured with temperature sensing grating encapsulation 5, temperature sensing grating encapsulation 5 is greater than the rigid of light signal transduction optical fiber 2 for thermal expansion coefficient
Property encapsulation, go quick for carrying out temperature sensing enhanced sensitivity and pressure sensing to temperature sensing grating 3, pressure sensing grating 4 is configured with
Pressure sensing grating encapsulation 6, for carrying out pressure enhanced sensitivity to pressure sensing grating 4.
It is that metal, macromolecule or other thermal expansion coefficients are greater than light signal transduction optical fiber 2 that temperature sensing grating, which encapsulates 4 materials,
Rigid material.
Pressure sensing grating encapsulation 6 is the conversion encapsulation that should change direction, for making pressure sensing grating 4 in the work of transverse pressure
(because the reflectance spectrum variation of fiber grating is sensitiveer to axial deformation, pass through strain side with lower generation axial deformation
The sensing enhanced sensitivity to transverse pressure is realized to conversion encapsulation).
It is metal, macromolecule or other rigid materials that pressure sensing grating, which encapsulates 6 materials,.
Sensitivity in order to further enhance temperature sensing grating 3 to temperature change, by the light in 3 region of temperature sensing grating
2 diameter of signal transduction optical fiber performs etching, the light signal transduction optical fiber to increase grating deformation caused by temperature changes, after etching
2 diameters are 20 to 110 μm.
Sensitivity in order to further enhance pressure sensing grating 4 to pressure change, by the light in 4 region of pressure sensing grating
2 diameter of signal transduction optical fiber performs etching, the light signal transduction optical fiber to increase grating deformation caused by pressure change, after etching
2 diameters are 20 to 110 μm.
Sensitivity in order to further enhance pressure sensing grating 4 to pressure change, in lacking for pressure sensing grating encapsulation 6
One layer of elastic film is covered at mouthful, or covers the preceding paragraph spring-backed quill on the surface of pressure sensing grating encapsulation 6, to increase pressure
Experience area.
Present invention specific implementation get up can there are many mode, below in one embodiment for be illustrated.
Embodiment: using 62.5/125 μm of common multimode fibre as signal transduction optical fiber 2.Using UV laser exposure
Method produces two fiber gratings in one end of signal transduction optical fiber 2.Wherein, it is temperature sensing grating 3 close to inside, leans on
Nearly outside is pressure conduction grating 4.
Using the capillary of one section of aluminum alloy material as temperature sensing grating encapsulation 5, cover outside temperature sensing grating 3
Portion is got up 2 rigid bond of signal transduction optical fiber at 3 both ends of capillary both ends and temperature sensing grating using medical glue, such as
Shown in Fig. 2.Aluminum alloy material has biggish thermal expansion coefficient, and biggish deformation can be generated in temperature change, is then forced
Temperature sensing grating 3 generates additional deformation, realizes temperature sensing enhanced sensitivity function.Aluminum alloy material has biggish rigidity, can
To mask influence of the ambient pressure to temperature sensing grating 3, realize that pressure sensing goes quick function.In order to further increase temperature
The sensitivity of sensing grating has carried out etching processing to 2 diameter of signal transduction optical fiber in 3 region of temperature sensing grating, after etching
Diameter be 50 μm.
Using aluminium alloy production pressure sensing grating encapsulation 6, as shown in Figure 3.Pressure sensing grating encapsulation 6 is U-shaped or arc
Shape is played 2 rigid bond of signal transduction optical fiber at 4 both ends of both ends and pressure sensing grating of U-shaped or arc using medical glue
Come.Pressure from 4 side of pressure sensing grating will lead to pressure sensing grating 4 and axial deformation occurs.In order to further increase
Sensitivity of the pressure sensing grating 4 to pressure change, to 2 diameter of signal transduction optical fiber in 4 region of pressure sensing grating into
Etching processing is gone, the diameter after etching is 50 μm.There is the cross sensitivity to temperature change in pressure sensing grating 4, using temperature
The output result for spending sensing grating 3 carries out temperature-compensating to pressure sensing grating 4.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to preferred embodiment, those skilled in the art should understand that, it can be right
Technical solution of the present invention is modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention,
It is intended to be within the scope of the claims of the invention.
Claims (8)
1. a kind of insertion type optical fiber sensing probe, it is characterised in that: include at least fibre-optical splice, light signal transduction optical fiber, temperature
Sensing grating and pressure sensing grating, fibre-optical splice are produced on one end of light signal transduction optical fiber, for connecting external light source
And detection part；Temperature sensing grating and pressure sensing grating are produced on optical signal by UV laser exposure or other methods and pass
The other end of guiding fiber, temperature sensing grating are encapsulated configured with temperature sensing grating, and temperature sensing grating is encapsulated as thermal expansion system
Number is greater than the rigidity encapsulation of light signal transduction optical fiber, for going to temperature sensing grating progress temperature sensing enhanced sensitivity and pressure sensing
Quick, pressure sensing grating is encapsulated configured with pressure sensing grating, for carrying out pressure enhanced sensitivity to pressure sensing grating；The pressure
Sensing grating encapsulation is fabricated to U-shaped or arc, and the signal transduction optical fiber at the both ends and pressure sensing grating both ends of U-shaped or arc is rigid
Property bonding；The pressure sensing grating is encapsulated as the conversion encapsulation that should change direction, for making pressure sensing grating in transverse pressure
Effect is lower to generate axial deformation.
2. insertion type optical fiber sensing probe according to claim 1, it is characterised in that: the temperature sensing grating encapsulation is adopted
It with one section of capillary, covers outside temperature sensing grating, the signal transduction optical fiber at capillary both ends and temperature sensing grating both ends
Rigid bond.
3. insertion type optical fiber sensing probe according to claim 1, it is characterised in that: the pressure sensing grating encapsulation
Indentation, there covers one layer of elastic film, or covers the preceding paragraph spring-backed quill on the surface of pressure sensing grating encapsulation.
4. insertion type optical fiber sensing probe according to claim 1, it is characterised in that: the temperature sensing grating package material
Matter is the rigid material that metal, macromolecule or other thermal expansion coefficients are greater than light signal transduction optical fiber.
5. insertion type optical fiber sensing probe according to claim 1, it is characterised in that: the pressure sensing grating package material
Matter is metal, macromolecule or aluminium alloy rigid material.
6. insertion type optical fiber sensing probe according to claim 1, it is characterised in that: the temperature sensing grating region
Light signal transduction fibre diameter performs etching, and the light signal transduction fibre diameter after etching is 20 to 110 μm.
7. insertion type optical fiber sensing probe according to claim 1, it is characterised in that: the pressure sensing grating region
Light signal transduction fibre diameter performs etching, and the light signal transduction fibre diameter after etching is 20 to 110 μm.
8. insertion type optical fiber sensing probe according to claim 1, it is characterised in that: the temperature sensing grating leans on dipped beam
The inside of the other end of signal transduction optical fiber, pressure conduction grating is close to the outside of the other end of light signal transduction optical fiber.
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| CN108709660A (en) * | 2018-05-28 | 2018-10-26 | 山东省科学院激光研究所 | Temperature-detecting device and system |
| CN110207848A (en) * | 2019-07-01 | 2019-09-06 | 蚌埠学院 | A kind of substrate adds upper cover type temperature sensitized optical fiber grating sensor |
Citations (6)
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| CN1329716A (en) * | 1998-12-04 | 2002-01-02 | 塞德拉公司 | Strain-isolated bragg grating temperature sensor |
| CN1412530A (en) * | 2002-12-18 | 2003-04-23 | 南开大学 | Slrain and temperature change simultaneously-measured single fibre grating packaging method and its sensor |
| CN201464078U (en) * | 2009-08-06 | 2010-05-12 | 中国地震局地壳应力研究所 | Single sleeve pipe etch-type fiber Bragg grating temperature and enhanced sensibility sensor |
| CN203069301U (en) * | 2012-12-12 | 2013-07-17 | 长城信息产业股份有限公司 | Fiber bragg grating-type pressure sensor |
| CN203303037U (en) * | 2013-06-24 | 2013-11-27 | 宋大伟 | Fiber grating sensor used for measuring human body temperature and breathing frequency |
| CN104655315A (en) * | 2013-11-15 | 2015-05-27 | 大连康赛谱科技发展有限公司 | Prestrain fiber grating and sensor thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6795599B2 (en) * | 2001-05-11 | 2004-09-21 | Vasilii V. Spirin | Differential fiber optical sensor with interference energy analyzer |
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2016
- 2016-09-30 CN CN201610870636.0A patent/CN106236035B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329716A (en) * | 1998-12-04 | 2002-01-02 | 塞德拉公司 | Strain-isolated bragg grating temperature sensor |
| CN1412530A (en) * | 2002-12-18 | 2003-04-23 | 南开大学 | Slrain and temperature change simultaneously-measured single fibre grating packaging method and its sensor |
| CN201464078U (en) * | 2009-08-06 | 2010-05-12 | 中国地震局地壳应力研究所 | Single sleeve pipe etch-type fiber Bragg grating temperature and enhanced sensibility sensor |
| CN203069301U (en) * | 2012-12-12 | 2013-07-17 | 长城信息产业股份有限公司 | Fiber bragg grating-type pressure sensor |
| CN203303037U (en) * | 2013-06-24 | 2013-11-27 | 宋大伟 | Fiber grating sensor used for measuring human body temperature and breathing frequency |
| CN104655315A (en) * | 2013-11-15 | 2015-05-27 | 大连康赛谱科技发展有限公司 | Prestrain fiber grating and sensor thereof |
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