CN102274006B - Fiber grating temperature sensor and probe thereof - Google Patents
Fiber grating temperature sensor and probe thereof Download PDFInfo
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- CN102274006B CN102274006B CN2011101724312A CN201110172431A CN102274006B CN 102274006 B CN102274006 B CN 102274006B CN 2011101724312 A CN2011101724312 A CN 2011101724312A CN 201110172431 A CN201110172431 A CN 201110172431A CN 102274006 B CN102274006 B CN 102274006B
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Abstract
The invention relates to a fiber grating temperature sensor which comprises a probe and a demodulating system connected with the probe, wherein the probe comprises a needle head and a handle which are connected together. The fiber grating temperature sensor is characterized in that the needle head is an austenitic stainless steel round bar with a needle point, the center of the bottom surface at one end of the austenitic stainless steel round bar is provided with a blind hole, and the blind hole extends close to the other end of the austenitic stainless steel round bar; and a fiber bragg grating is arranged in the blind hole. The invention is mainly used for manufacturing fiber grating temperature sensors for microwave thermotherapy of bone tumors.
Description
Technical field
The present invention relates to a kind of fiber-optical grating temperature sensor and probe thereof, relate in particular to a kind of optical fiber Bragg grating temperature sensor, this sensor is particularly useful for the clinical practice of bone tumor microwave heat therapeutic.
Background technology
Tumor is a class serious threat human life and healthy disease.One of its characteristics are that diffusibility is very strong, and because tumor cell and normal human tissue cell on every side without obvious demarcation line, therefore adopt general therapeutic method of surgery to be difficult to complete tumor resection cell, in afterwards easily recurrence of operation.Although radiation therapy and chemotherapy energy kill tumor cell also make a large amount of normal tissue cells suffer damage simultaneously, cause patient's health further to worsen, and are difficult to accept successive treatment.Countries in the world are in succession developed and are utilized microwave to treat tumor at present, its mechanism of action is: with the microwave action of upper frequency in tumor locus, tumor cell and normal surrounding tissue cell heat up under the effect of microwave, utilize the low characteristic of tumor cell ratio normal tissue cell death point, temperature is controlled within the specific limits (42-44 ° of C), certain time just can reach both killing off tumor cells, has guaranteed again the therapeutic purposes of the activity of normal tissue cell.But if temperature is higher than 45 ° of C, then normal tissue cell also can be subject to major injury.Therefore, when carrying out microwave heat therapeutic, be the key that realizes the tumor microwave heat treatment technology to the control temp that accurately adds of tumor locus, simultaneously, be the basic premise of realizing accurately adding control temp for the accurate temperature measurement of tumor locus.
The tumor temp measuring system is the ingredient of external microwave heat therapeutic instrument, in external microwave heat therapeutic instrument therapeutic process, and the temperature of Real-Time Monitoring tumor locus.Temperature transducer is generally made the probe form, inserts tumor locus, carries out real time temperature measurement in therapeutic process.Traditional microwave heat therapeutic instrument temperature sensor mostly is greatly electronic sensor or fluorescent optical fiber temperature sensor, because external high frequency thermotherapy instrument is the high-power high-frequency therapeutic equipment, therefore can produce very strong electromagnetic interference, it can disturb the electronic equipment of surrounding, make their cisco unity malfunctions, therefore in the micro-wave therapeutic process, use electronic sensor to have the probability that lost efficacy.When using fluorescence formula fibre optic thermometer to measure temperature, because the bending of any point optical fiber all can have influence on the intensity of spectrum, produce intensity loss, affect certainty of measurement, so it is low that fluorescence formula fibre optic thermometer has precision, the shortcoming of poor reliability is not suitable for long-term seriality and measures.
In bone tumor microwave heat therapeutic process, usually probe tip will be inserted the more tough and tensile tissues such as periosteum, mechanical strength for probe has higher requirement, the manufacture method of conventional temperature sensor hollow needle is generally: an end of one section wall thickness stainless pipe that is 0.1mm is inserted stainless steel round bar, adopt the mode of glueing joint or welding that stainless pipe and stainless steel round bar are linked together, then cut out the inclined-plane as needle point.The wall thickness of this hollow needle is thinner, often can fracture when inserting the bone tumor position, thereby lose efficacy, and can cause unnecessary damage to the patient.Because the connecting mode that adopts welding or glued joint, will cause the stainless steel round bar place at needle point position poorly sealed and come off easily behind the Reusability, also easily the patient is caused unnecessary damage.In order to alleviate the overall weight of sensor, the handle of conventional temperature sensor adopts nonmetallic materials usually, thereby has further reduced the mechanical strength of sensor integral body.Be not suitable for the clinical practice of bone tumor microwave heat therapeutic.
Summary of the invention
The objective of the invention is the above-mentioned deficiency for prior art, design provides a kind of fiber-optical grating temperature sensor that is applied to microwave heat therapeutic, and is simple in structure, lightweight, volume is little, sturdy and durable, safe and convenient to use, use optical signal transmission, not disturbed by microwave radiation, energy is the temperature of measuring probe insertion point accurately, can guarantee to realize curative effect and the invasive of tumor microwave heat treatment, is particularly useful for the clinical practice of bone tumor microwave heat therapeutic.
A kind of fiber-optical grating temperature sensor, it comprises probe and the demodulating system that is attached thereto, described probe comprises syringe needle and the handle that links together, it is characterized in that described syringe needle is the pole with needle point, at face center, pole one bottom one blind hole is set, this blind hole extends to the other end that needle point is arranged near pole; In blind hole, pass through quartz glass capillary fixed fiber Bragg grating.
The concrete characteristics of this programme also have, Fiber Bragg Grating FBG is set in blind hole refers to that coat with described Fiber Bragg Grating FBG root 5mm tail optical fiber divests and be inserted into described quartz glass capillary near the position of front end after being positioned at the Fiber Bragg Grating FBG root 5mm tail optical fiber surface coating of quartz glass capillary postmedian, the Fiber Bragg Grating FBG top is apart from the about 5mm of quartz glass capillary front end, after the adhesive curing, Fiber Bragg Grating FBG is in an end free state.Then Fiber Bragg Grating FBG is inserted the syringe needle blind hole together with quartz glass capillary and at syringe needle root gluing, syringe needle and optical fiber are fixed.After the adhesive curing, quartz glass capillary is in free state in syringe needle, it and the deformation that can not cause grating that contacts of syringe needle inwall, thereby can not affect certainty of measurement.
Described pole is the austenitic stainless steel pole, diameter of the rod 2mm, and blind hole diameter 1mm, the blind hole cecum is apart from austenitic stainless steel pole other end 5mm.
Described handle is that medical aluminium alloy is made, and is hollow tubular, is provided with the ring platform at the anterior inner chamber of handle, and the ring platform is divided into inner chamber with handle and is divided into different two sections of internal diameter, and leading portion arranges female thread and is fixedly connected with syringe needle; Adopt the mode of glueing joint and being threaded that described syringe needle and handle are linked together.Handle back segment fixed fiber outer layer protection sleeve pipe.The leading portion screwed hole degree of depth is 5mm, by this section screwed hole, syringe needle and handle can be linked together.Handle back segment internal diameter 3.2mm, degree of depth 50mm by this section endoporus, can be linked together fiber outer layer protective casing and handle.
Ring platform thickness 2mm; the through hole that a diameter 1mm is arranged at the ring platform; ring the acting as of platform: 1, bear the pressure that acts on when syringe needle thrusts object on the syringe needle, 2, prevent contacting of fiber outer layer protective casing and syringe needle, avoid fractureing because both touching causes optical fiber.By 1mm through hole on the ring platform, optical fiber can be passed handle.
Handle back segment fixed fiber outer layer protection sleeve pipe refers to tail optical fiber is penetrated optical fiber internal layer protective casing; optical fiber internal layer protective casing is inserted the handle endoporus along optical fiber from the handle rear portion; again behind the outer wall gluing with the about 10mm length of internal layer protective casing front end; the internal layer protective casing is penetrated the fiber outer layer protective casing; and being positioned at handle rear end outer layer protection sleeve surface gluing, fiber outer layer protective casing and handle are bonded together.At last plug is welded on the tail optical fiber.
The manufacture method of described syringe needle is: in the blind hole that diameter of a bottom face centre drill of the austenitic stainless steel pole of diameter 2mm is 1mm, blind hole is drilled into the place apart from stainless steel round bar other end 5mm, then cuts out herein 15 ° of inclined-planes as needle point.Process the screw thread of M2x0.2, the about 6mm of reach at the other end outer surface of needle point.
The beneficial effect of this programme can be learnt according to the narration to such scheme, fiber-optical grating temperature sensor is to make it treat the testing temperature parameter sensitivity by the special package to fiber grating, and measures temperature parameters to be measured by the variation of optical signal feedback optic fiber grating wavelength.Can realize that multiple spot detects, real-time continuous detects.Have the characteristics such as microwave radiation disturbs, response time is short, range is large, resolution is high, certainty of measurement is high, good, the long-term measurement reproducibility of the linearity is good that are not subjected to, can in microwave field, accurately measure the temperature of tumor locus, thereby reach the purpose that tumor locus is accurately added control temp.The sensor handle adopts medical aluminium alloy to make, 0.5mm the thick-wall hollow probe tip adopt stainless steel material to make, the connecting mode of handle and syringe needle adopts and glueds joint and thread connection, mechanical strength is very high, and blind hole structure has guaranteed that good sealing, security performance are good, the advantage of long service life.The situation of stopping to fracture occurs, and thermometric is accurate.
Grating is encapsulated in then encloses syringe needle in the quartz glass capillary, and make grating as far as possible near needle point.The purpose of doing like this has two: one, protect Fiber Bragg Grating FBG with quartz glass capillary, make it be in an end free state, can deformation not occur because touching the syringe needle inwall, certainty of measurement has been guaranteed in the environmental error impact when having avoided measuring; Two, the temperature of guaranteeing tip position can conduct to rapidly Fiber Bragg Grating FBG accurately, thereby has greatly shortened the response time of sensor.
Description of drawings
Fig. 1 is fiber-optical grating temperature sensor profile of the present invention; Fig. 2 is optical fiber grating temperature of the present invention
The B section profile of sensor; Fig. 3 is the C section profile of fiber-optical grating temperature sensor of the present invention; Fig. 4 is the D section profile of fiber-optical grating temperature sensor of the present invention; Fig. 5 is the E section profile of fiber-optical grating temperature sensor of the present invention; Fig. 6 is the Principle of Demodulation System block diagram of fiber-optical grating temperature sensor of the present invention; Fig. 7 is the monnolithic case figure of fiber-optical grating temperature sensor of the present invention; Wherein: 1-handle, 2-syringe needle, 3-fiber outer layer protective casing, 4-Fiber Bragg Grating FBG, 5-quartz glass capillary; 6-optical fiber internal layer protective casing, 7-plug, the gluing contact of 8-, the gluing contact of 9-, the gluing contact of 10-; the 11-tail optical fiber, the gluing contact of 12-, the gluing contact of 13-, 14-encircles platform.
The specific embodiment
Embodiment 1
A kind of probe of fiber-optical grating temperature sensor, it comprises syringe needle 2 and the handle 1 that links together, and described syringe needle 2 is the poles with needle point, at face center, pole one bottom one blind hole is set, and this blind hole extends to the other end that needle point is arranged near pole; In blind hole, pass through quartz glass capillary 5 fixed fiber Bragg gratings 4.Fiber Bragg Grating FBG 4 is set in blind hole refers to that coat with described Fiber Bragg Grating FBG 4 and root 5mm tail optical fiber 11 thereof divests and be inserted into described quartz glass capillary 5 near the position of front end behind the surface coating of the Fiber Bragg Grating FBG 4 root 5mm tail optical fibers 11 that are being positioned at quartz glass capillary 5 rear portions, then Fiber Bragg Grating FBG 4 is inserted syringe needle 2 blind holes together with quartz glass capillary 5 and at syringe needle 2 root gluings, syringe needle 2 and tail optical fiber 11 is fixing.Described pole is the austenitic stainless steel pole, diameter of the rod 2mm, and blind hole diameter 1mm, the blind hole cecum is apart from austenitic stainless steel pole other end 5mm.Described quartz glass capillary 5 length 20mm, external diameter 0.3mm, internal diameter 0.15mm.The grid region length of described Fiber Bragg Grating FBG 4 is about 10mm, is 0.25mm with the Fiber Bragg Grating FBG 4 of coat and the diameter of tail optical fiber 11, divests coat and is 0.125mm afterwards.With the coat of Fiber Bragg Grating FBG 4 divest refer to the 10mm grid region with and the coat of the 5mm tail optical fiber of root divest.Behind the root gluing of Fiber Bragg Grating FBG 4, be inserted into described quartz glass capillary 5 interior positions near front end and refer to surface coating at the 5mm tail optical fiber 11 of the grid region root that has divested coat, then insert in the quartz glass capillary 5, make the top of Fiber Bragg Grating FBG 4 not expose quartz glass capillary 5, and apart from the about 5mm of quartz glass capillary 5 front ends.After the adhesive curing, Fiber Bragg Grating FBG 4 is in an end free state (not stressing).
Described handle 1 is hollow tubular, is provided with ring platform 14 at handle 1 anterior inner chamber, and ring platform 14 is divided into different two sections of internal diameter with the inner chamber of handle 1, and leading portion arranges female thread and is fixedly connected with syringe needle 2; Adopt the mode of glueing joint and being threaded that described syringe needle and handle are linked together; Handle 1 back segment fixed fiber outer layer protection sleeve pipe 3.Described ring platform 14 thickness 2mm have the through hole of a diameter 1mm at the ring platform.Handle 1 back segment fixed fiber outer layer protection sleeve pipe 3 refers to tail optical fiber 11 is penetrated optical fiber internal layer protective casing 6; optical fiber internal layer protective casing 6 is inserted handle 1 endoporus in 1 rear portion along optical fiber from handle; again internal layer protective casing 6 is penetrated fiber outer layer protective casing 3; and at gluing contact 10 place's gluings of fiber outer layer protective casing 3 outer surfaces, fiber outer layer protective casing 3 and handle 1 are bonded together.
The coat of Fiber Bragg Grating FBG 4 is divested, gluing contact 8 place's gluings on bare fibre, insert quartz glass capillary 5(external diameter 0.3mm, internal diameter 0.15mm) in, after waiting for adhesive curing, then tail optical fiber 11 gluing adhesive spots 9 place's gluings at distance Fiber Bragg Grating FBG 4 about 10mm places insert rustless steel hollow needle 2(wall thickness 0.5mm with the quartz glass capillary 5 that bonds together together with Fiber Bragg Grating FBG 4) endoporus, to extreme position.After waiting for adhesive curing, gluing on syringe needle 2 end thread inserts medical hand grip of aluminum alloy 1 front end endoporus, and utilizing is threaded tightens.Tail optical fiber 11 is penetrated optical fiber internal layer protective casing 6; optical fiber internal layer protective casing 6 is inserted the handle endoporus along tail optical fiber 11 from the handle rear portion; again optical fiber internal layer protective casing 6 is penetrated fiber outer layer protective casing 3; and at gluing contact 10 place's gluings, fiber outer layer protective casing 3 and handle 1 are bonded together.At last plug 7 is welded on the tail optical fiber.
Embodiment 2
Present embodiment and embodiment 1 something in common repeat no more, and difference is that it is a kind of fiber-optical grating temperature sensor, and it comprises probe and the demodulating system that is attached thereto.System principle diagram as shown in Figure 5, the narrow band light of laser instrument output enters the sensor fibre grating through isolator and bonder, it is tuning by signal generator narrow band laser to be carried out light path, and the periodic centre wavelength that changes output light is with the reflectance spectrum of scanning sensor fibre grating.When the output spectrum of laser instrument changed, the receiving light power of detector changed the matching state of the reflectance spectrum of the output spectrum reflected laser instrument and sensor fibre grating.In theory, when the centre wavelength of laser instrument and sensor fibre grating was mated fully, detector received to such an extent that luminous power reaches maximum.So the output wavelength equivalence of narrow-band light source obtains the reflection wavelength of corresponding fiber grating in the time of can be the strongest according to reflected light, thereby can calculate the temperature of measurement point.The Wavelength demodulation mode is adopted in this demodulation, has avoided the unstability of light intensity demodulation.
Claims (8)
1. fiber-optical grating temperature sensor, it comprises probe and the demodulating system that is connected with probe, described probe comprises syringe needle and the handle that links together, it is characterized in that described syringe needle is the pole with needle point, at face center, pole one bottom one blind hole is set, this blind hole extends to the other end that needle point is arranged near pole; In blind hole, pass through quartz glass capillary fixed fiber Bragg grating; In blind hole, refer to by quartz glass capillary fixed fiber Bragg grating that coat with described Fiber Bragg Grating FBG root tail optical fiber divests and gluing after described Fiber Bragg Grating FBG is inserted in the described quartz glass capillary position near front end, then Fiber Bragg Grating FBG is inserted the syringe needle blind hole together with quartz glass capillary and at syringe needle root gluing, syringe needle and tail optical fiber are fixed.
2. fiber-optical grating temperature sensor according to claim 1 is characterized in that described pole is the austenitic stainless steel pole, diameter of the rod 2mm, and blind hole diameter 1mm, the blind hole cecum is apart from austenitic stainless steel pole other end 5mm.
3. fiber-optical grating temperature sensor according to claim 1 is characterized in that described handle is hollow tubular, is provided with the ring platform at the anterior inner chamber of handle, and the ring platform is divided into different two sections of internal diameter with intracavity of handle, and leading portion arranges female thread and is fixedly connected with syringe needle; Adopt the mode of glueing joint and being threaded that described syringe needle and handle are linked together.
4. the probe of a fiber-optical grating temperature sensor, it comprises syringe needle and the handle that links together, and it is characterized in that described syringe needle is the pole with needle point, at face center, pole one bottom one blind hole is set, this blind hole extends to the other end that needle point is arranged near pole; In blind hole, pass through quartz glass capillary fixed fiber Bragg grating; In blind hole, refer to by quartz glass capillary fixed fiber Bragg grating that coat with described Fiber Bragg Grating FBG root tail optical fiber divests and gluing after described Fiber Bragg Grating FBG is inserted in the described quartz glass capillary position near front end, then Fiber Bragg Grating FBG is inserted the syringe needle blind hole together with quartz glass capillary and at syringe needle root gluing, syringe needle and tail optical fiber are fixed.
5. the probe of fiber-optical grating temperature sensor according to claim 4 is characterized in that described pole is the austenitic stainless steel pole, diameter of the rod 2mm, and blind hole diameter 1mm, the blind hole cecum is apart from austenitic stainless steel pole other end 5mm.
6. according to claim 4 or the probe of 5 described fiber-optical grating temperature sensors, it is characterized in that described handle is hollow tubular, be provided with the ring platform at the anterior inner chamber of handle, the ring platform is divided into different two sections of internal diameter with intracavity of handle, and leading portion arranges female thread and is fixedly connected with syringe needle; Adopt the mode of glueing joint and being threaded that described syringe needle and handle are linked together; Handle back segment fixed fiber outer layer protection sleeve pipe.
7. the probe of fiber-optical grating temperature sensor according to claim 6 is characterized in that described ring platform thickness 2mm, and the through hole of a diameter 1mm is arranged at the ring platform.
8. the probe of fiber-optical grating temperature sensor according to claim 6; it is characterized in that handle back segment fixed fiber outer layer protection sleeve pipe refers to tail optical fiber is penetrated optical fiber internal layer protective casing; optical fiber internal layer protective casing is inserted the handle endoporus along optical fiber from the handle rear portion; to penetrate the fiber outer layer protective casing behind the internal layer protective casing front-end surface gluing again; and being positioned at handle rear end outer layer protection sleeve surface gluing, fiber outer layer protective casing and handle are bonded together.
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| CN2011101724312A CN102274006B (en) | 2011-06-24 | 2011-06-24 | Fiber grating temperature sensor and probe thereof |
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| CN2011101724312A CN102274006B (en) | 2011-06-24 | 2011-06-24 | Fiber grating temperature sensor and probe thereof |
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| CN102274006B true CN102274006B (en) | 2013-02-20 |
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Families Citing this family (14)
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| CN102587893B (en) * | 2012-03-13 | 2015-04-22 | 山东省科学院激光研究所 | Optic fiber temperature pressure sensor and probe thereof |
| CN104486991B (en) * | 2012-05-18 | 2017-09-01 | 皇家飞利浦有限公司 | Voxel is tagged using optical fiber shape sensing |
| CN103948374B (en) * | 2014-05-15 | 2016-02-03 | 哈尔滨易奥秘科技发展有限公司 | A kind of electromagnetism interference medical body inner fiber temperature transducer |
| CN104434050A (en) * | 2014-12-19 | 2015-03-25 | 苏州全润医疗科技有限公司 | Thermometer |
| CN104677290B (en) * | 2015-03-05 | 2017-06-09 | 哈尔滨工业大学 | Twin-core fiber grating micro-scale measurement probe manufacturing method based on self assembly principle |
| TWI582378B (en) * | 2016-05-18 | 2017-05-11 | 南臺科技大學 | Sensing touch probe of probe tip |
| US10175435B2 (en) | 2016-10-11 | 2019-01-08 | Boston Scientific Scimed, Inc. | Medical laser device and related methods |
| CN107329162B (en) * | 2017-08-04 | 2019-04-26 | 上海交通大学 | Gamma radiation real-time measurement apparatus and its system based on Bragg grating |
| CN108523991B (en) * | 2018-02-13 | 2020-10-09 | 南京亿高微波系统工程有限公司 | High-efficient refrigerated multi-functional microwave ablation needle |
| CN108709660A (en) * | 2018-05-28 | 2018-10-26 | 山东省科学院激光研究所 | Temperature-detecting device and system |
| CN109363931A (en) * | 2018-10-25 | 2019-02-22 | 潍坊医学院 | The temperature control method of optical-fiber laser thermal conductivity acupuncture needle warming device |
| CN109984734A (en) * | 2019-03-12 | 2019-07-09 | 南京航空航天大学 | A kind of multiple spot tumor thermotherapy thermometric needle based on fiber bragg grating |
| CN109938831A (en) * | 2019-03-12 | 2019-06-28 | 南京航空航天大学 | A kind of tumor microwave ablation needle with optical fiber temperature-measurement function |
| CN112776413B (en) * | 2020-12-30 | 2022-08-16 | 济宁科力光电产业有限责任公司 | Position pressure hybrid optimization control method of servo press |
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