CN214149622U - Many people are temperature measuring device simultaneously based on centreless optic fibre - Google Patents
Many people are temperature measuring device simultaneously based on centreless optic fibre Download PDFInfo
- Publication number
- CN214149622U CN214149622U CN202120042721.4U CN202120042721U CN214149622U CN 214149622 U CN214149622 U CN 214149622U CN 202120042721 U CN202120042721 U CN 202120042721U CN 214149622 U CN214149622 U CN 214149622U
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- temperature measuring
- coreless
- temperature
- disposable
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 31
- 239000013307 optical fiber Substances 0.000 claims abstract description 58
- 239000000523 sample Substances 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 claims description 6
- 230000002209 hydrophobic effect Effects 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 abstract description 11
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052753 mercury Inorganic materials 0.000 abstract description 5
- 230000003595 spectral effect Effects 0.000 abstract description 3
- 238000001228 spectrum Methods 0.000 description 10
- 208000035143 Bacterial infection Diseases 0.000 description 2
- 208000022362 bacterial infectious disease Diseases 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000036142 Viral infection Diseases 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003612 virological effect Effects 0.000 description 1
Images
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
本实用新型公开一种基于无芯光纤的多人同时测温装置，整个装置由扫描激光器、光纤环形器、阵列波导光栅(AWG)、一次性光纤测温探头、光电探测器和中控单元构成；当一次性光纤测温探头所处的环境温度发生变化时，探头内填充的温度敏感液体发生膨胀，导致一次性光纤测温探头的反射光谱强度发生变化，通过检测反射光谱强度的变化可以获得测量点的温度情况；本实用新型的优点在于：所设计的测温装置可多人同时测温，装置中的一次性光纤测温探头价格低廉，用后即丢，安全可靠，避免了电子温度计易受电磁干扰的缺点以及水银温度计中水银不慎泄露所带来的安全隐患。
The utility model discloses a multi-person simultaneous temperature measurement device based on a coreless optical fiber. The whole device is composed of a scanning laser, an optical fiber circulator, an array waveguide grating (AWG), a disposable optical fiber temperature measurement probe, a photoelectric detector and a central control unit. ; When the ambient temperature of the disposable fiber optic temperature measuring probe changes, the temperature-sensitive liquid filled in the probe expands, causing the reflection spectral intensity of the disposable optical fiber temperature measuring probe to change. The temperature situation of the measuring point; the advantages of the utility model are: the designed temperature measuring device can measure the temperature of many people at the same time, the disposable optical fiber temperature measuring probe in the device is low in price, can be thrown away after use, is safe and reliable, and avoids the need for electronic thermometers The disadvantage of being susceptible to electromagnetic interference and the safety hazard caused by the accidental leakage of mercury in the mercury thermometer.
Description
Technical Field
The utility model belongs to the technical field of the optical fiber sensing and the temperature measurement field, concretely relates to many people are temperature measuring device simultaneously based on centreless optic fibre.
Background
Highly contagious diseases spread rapidly worldwide, and accurate body temperature measurements have guiding significance for preliminary diagnosis of viral or bacterial infections. Traditional body temperature measurement mostly adopts modes such as mercury thermometer, electronic thermometer and the more popular rifle type infrared clinical thermometer now, and these modes measuring speed is slow, anti-electromagnetic interference is weak, receive the ambient temperature influence big, and reuse probably leads to the further propagation of virus or bacterial infection, therefore a temperature measuring device that can overcome above problem has become medical urgent need. The utility model provides a many people are temperature measuring device simultaneously based on centreless optic fibre can avoid the closely contact of temperature detection time measuring medical staff and surveyed personnel, has improved medical staff operational environment's security.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an easy operation, measurement accuracy height, handy many people temperature measuring device simultaneously based on centreless optic fibre, disposable optic fibre temperature probe in the device has utilized multimode interference principle and liquid thermometer temperature measurement principle, according to the characteristic that disposable optic fibre temperature probe output spectrum changes along with temperature change, finally realizes the measurement of body temperature.
The utility model adopts the technical proposal that:
a multi-person simultaneous temperature measuring device based on a coreless optical fiber is characterized by comprising a scanning laser (1), an optical fiber circulator (2), an array waveguide grating (3), a disposable optical fiber temperature measuring probe (4), a photoelectric detector (5) and a central control unit (6); the output end of the scanning laser (1) is connected with the input end of the optical fiber circulator (2), the first output end of the optical fiber circulator (2) is connected with the input end of the arrayed waveguide grating (3), one output end of the arrayed waveguide grating (3) is connected with the input end of the disposable temperature measuring probe (4), the second output end of the optical fiber circulator (2) is connected with the input end of the photoelectric detector (5), and the output end of the photoelectric detector (5) is connected with the central control unit (6).
A many people temperature measuring device simultaneously based on centreless optic fibre, its characterized in that: the disposable optical fiber temperature measuring probe (4) consists of a coreless optical fiber (4-1), a capillary tube (4-2) and a filling liquid (4-3).
The disposable optical fiber temperature measuring probe (4) is characterized in that: the effective refractive index of the filling liquid (4-3) is smaller than that of the coreless fiber (4-1), and the filling liquid (4-3) has high thermal expansion coefficient and linear expansion characteristic in a wide temperature range, and can be selected according to measurement requirements.
The disposable optical fiber temperature measuring probe (4) is characterized in that: the left end of the capillary tube (4-2) is closed, and the right end is sealed after filling liquid (4-3) is added.
The disposable optical fiber temperature measuring probe (4) is characterized in that: the surface of the coreless fiber (4-1) and the inner wall of the capillary (4-2) need to be subjected to surface hydrophobic treatment so as to avoid the residue of the filling liquid (4-3).
A many people temperature measuring device simultaneously based on centreless optic fibre, its characterized in that: the lengths of coreless optical fibers (4-1) in the disposable optical fiber temperature measuring probe (4) connected with each output channel of the arrayed waveguide grating (3) are different so as to match the central wavelength of each output channel of the arrayed waveguide grating (3).
The utility model discloses a theory of operation is:
when light is coupled into a coreless fiber from a single-mode fiber, the central wavelength of its output spectrum can be expressed as follows, since the coreless fiber forms a multimode fiber structure with an external medium (air or filled liquid):
wherein n is1For the effective refractive index of multimode fiber structures, D1Is a multimode optical fiberThe effective diameter of the structure, L, is the length of the coreless fiber.
When the ambient temperature changes, the liquid filled in the capillary tube expands, and the disposable optical fiber temperature measuring probe is equivalent to a multimode optical fiber (MM) taking a section of air as a cladding1) And a section of multimode optical fiber (MM) filled with a liquid as a cladding2) The central wavelength of the output spectrum of the disposable optical fiber temperature measuring probe is caused to drift, and the expression of the central wavelength after the drift is as follows:
wherein, λ'mIs the wavelength after the drift; n is1，D1，L1Respectively multimode optical fiber (MM)1) Effective refractive index, effective diameter and length; n is2，D2，L2Respectively multimode optical fiber (MM)2) Effective refractive index, effective diameter and length.
Multimode optical fiber MM2Length L of2The relationship with temperature can be given by the following equation:
where Δ α represents a difference in thermal expansion coefficient between the filling liquid and the capillary, V is the total volume of the filling liquid, and Δ T is a temperature change amount.
The formula (1), (2) and (3) show that the spectrum wavelength drift delta lambda of the disposable optical fiber temperature measuring probe can be expressed as follows:
when the output spectrum of the disposable optical fiber temperature measuring probe passes through an Arrayed Waveguide Grating (AWG), the central wavelength of each channel of the AWG is fixed, and the output spectrum of the disposable optical fiber temperature measuring probe drifts along with the change of temperature, so that the light intensity input to the photoelectric detector changes, and the temperature of a human body is reversely deduced by measuring the change of the output voltage of the photoelectric detector.
The beneficial effects of the utility model reside in that:
the utility model discloses utilize centreless optic fibre and outside medium to form multimode fiber structure, combine AWG's branch ripples and ripples function of combining, realize many people temperature measurement simultaneously. When the temperature rises, the expansion of the liquid filled in the capillary tube leads to the drift of the wavelength of the output spectrum of the disposable optical fiber temperature measuring probe, the change of the light intensity at the central wavelength of each channel in the output spectrum of the AWG leads to the change of the output voltage of the photoelectric detector, and finally the change of the output voltage is monitored by the central control unit to reversely deduce the temperature of the human body. The whole device is simple in structure, convenient to operate and carry, the disposable optical fiber temperature measuring probe is low in price, can be lost after being used, is safe and reliable, and avoids the defects that the electronic thermometer is easy to suffer from electromagnetic interference and potential safety hazards caused by careless leakage of mercury in the mercury thermometer.
Drawings
FIG. 1 is a schematic structural diagram of a multi-user simultaneous temperature measurement device based on coreless optical fibers.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, a multi-person simultaneous temperature measuring device based on coreless optical fibers is characterized by comprising a scanning laser (1), an optical fiber circulator (2), an arrayed waveguide grating (3), a disposable optical fiber temperature measuring probe (4), a photoelectric detector (5) and a central control unit (6); the output end of the scanning laser (1) is connected with the input end of the optical fiber circulator (2), the first output end of the optical fiber circulator (2) is connected with the input end of the arrayed waveguide grating (3), one output end of the arrayed waveguide grating (3) is connected with the input end of the disposable temperature measuring probe (4), the second output end of the optical fiber circulator (2) is connected with the input end of the photoelectric detector (5), and the output end of the photoelectric detector (5) is connected with the central control unit (6). Foretell many people is temperature measuring device simultaneously based on centreless optic fibre, its characterized in that: the disposable optical fiber temperature measuring probe (4) consists of a coreless optical fiber (4-1), a capillary tube (4-2) and a filling liquid (4-3). The disposable optical fiber temperature measuring probe (4) is characterized in that: the effective refractive index of the filling liquid (4-3) is smaller than that of the coreless fiber (4-1), and the filling liquid (4-3) has high thermal expansion coefficient and linear expansion characteristic in a wide temperature range, and can be selected according to measurement requirements. The disposable optical fiber temperature measuring probe (4) is characterized in that: the left end of the capillary tube (4-2) is closed, and the right end is sealed after filling liquid (4-3) is added. The disposable optical fiber temperature measuring probe (4) is characterized in that: the surface of the coreless fiber (4-1) and the inner wall of the capillary (4-2) need to be subjected to surface hydrophobic treatment so as to avoid the residue of the filling liquid (4-3). Foretell many people is temperature measuring device simultaneously based on centreless optic fibre, its characterized in that: the lengths of coreless optical fibers (4-1) in the disposable optical fiber temperature measuring probe (4) connected with each output channel of the arrayed waveguide grating (3) are different so as to match the central wavelength of each output channel of the arrayed waveguide grating (3).
The method utilizes a coreless optical fiber and an external medium (air or filling liquid) to form a multimode optical fiber structure, and combines the AWG to realize simultaneous temperature measurement of a plurality of persons. During measurement, N output ends of the AWG are connected with N disposable temperature measuring probes through a channel 1thFor example, scanning laser emission and channel 1thCenter wavelength λ1Matched laser light, laser light entering 1 through AWGthThe output spectrum of the disposable optical fiber temperature measuring probe can drift along with the change of temperature, and the spectrum after the drift returns to the channel 1 of the AWGthThe output spectral intensity of which changes due to the filter characteristics of the AWG, and the channel 1 can be reversely deduced by detecting the change of the output spectral intensitythThe temperature change condition of the patient realizes the body temperature measurement. Temperature measurement of other channels and the channel 1thThe same procedure is used.
Claims (6)
1. A multi-person simultaneous temperature measuring device based on a coreless optical fiber is characterized by comprising a scanning laser (1), an optical fiber circulator (2), an array waveguide grating (3), a disposable optical fiber temperature measuring probe (4), a photoelectric detector (5) and a central control unit (6); the output end of the scanning laser (1) is connected with the input end of the optical fiber circulator (2), the first output end of the optical fiber circulator (2) is connected with the input end of the arrayed waveguide grating (3), one output end of the arrayed waveguide grating (3) is connected with the input end of the disposable temperature measuring probe (4), the second output end of the optical fiber circulator (2) is connected with the input end of the photoelectric detector (5), and the output end of the photoelectric detector (5) is connected with the central control unit (6).
2. The multi-person simultaneous temperature measuring apparatus based on coreless fiber as recited in claim 1, wherein: the disposable optical fiber temperature measuring probe (4) consists of a coreless optical fiber (4-1), a capillary tube (4-2) and a filling liquid (4-3).
3. The multi-person simultaneous temperature measuring apparatus based on coreless fiber as recited in claim 2, wherein: the effective refractive index of the filling liquid (4-3) is smaller than that of the coreless fiber (4-1), and the filling liquid (4-3) has high thermal expansion coefficient and linear expansion characteristic in a wide temperature range, and can be selected according to measurement requirements.
4. The multi-person simultaneous temperature measuring apparatus based on coreless fiber as recited in claim 2, wherein: the left end of the capillary tube (4-2) is closed, and the right end is sealed after filling liquid (4-3) is added.
5. The multi-person simultaneous temperature measuring apparatus based on coreless fiber as recited in claim 2, wherein: the surface of the coreless fiber (4-1) and the inner wall of the capillary (4-2) need to be subjected to surface hydrophobic treatment so as to avoid the residue of the filling liquid (4-3).
6. The multi-person simultaneous temperature measuring apparatus based on coreless fiber as recited in claim 1, wherein: the lengths of coreless optical fibers (4-1) in the disposable optical fiber temperature measuring probe (4) connected with each output channel of the arrayed waveguide grating (3) are different so as to match the central wavelength of each output channel of the arrayed waveguide grating (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120042721.4U CN214149622U (en) | 2021-01-08 | 2021-01-08 | Many people are temperature measuring device simultaneously based on centreless optic fibre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120042721.4U CN214149622U (en) | 2021-01-08 | 2021-01-08 | Many people are temperature measuring device simultaneously based on centreless optic fibre |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214149622U true CN214149622U (en) | 2021-09-07 |
Family
ID=77546777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120042721.4U Expired - Fee Related CN214149622U (en) | 2021-01-08 | 2021-01-08 | Many people are temperature measuring device simultaneously based on centreless optic fibre |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214149622U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747836A (en) * | 2021-01-08 | 2021-05-04 | 中国计量大学 | Many people are temperature measuring device simultaneously based on centreless optic fibre |
-
2021
- 2021-01-08 CN CN202120042721.4U patent/CN214149622U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747836A (en) * | 2021-01-08 | 2021-05-04 | 中国计量大学 | Many people are temperature measuring device simultaneously based on centreless optic fibre |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5499313A (en) | Distributed and spatially averaged fiber optic temperature sensors and method using same | |
| JPS6329620A (en) | Sensor for measuring concentration of gaseous component in fluid by absorption | |
| CN105115621B (en) | The Raman sensing temp measuring system and method for a kind of both-end injection loop configuration | |
| CN214149622U (en) | Many people are temperature measuring device simultaneously based on centreless optic fibre | |
| Vaguine et al. | Multiple sensor optical thermometry system for application in clinical hyperthermia | |
| CN112747836A (en) | Many people are temperature measuring device simultaneously based on centreless optic fibre | |
| WO1984003143A1 (en) | Optical probe to measure the depth of a cavity | |
| RU2381461C1 (en) | Laser radiation power metre | |
| US5300769A (en) | Method and system of compensating for signal artifacts in a fiber-optic sensing system | |
| Yoo et al. | Development of optical fiber-based respiration sensor for noninvasive respiratory monitoring | |
| Yasin et al. | Design of multimode tapered fibre sensor for glucose detection | |
| Scheggi | Optical fiber sensors in medicine | |
| Liyun et al. | Optical fiber sensor determination of the water salinity based on surface plasmon resonance | |
| CN114486766B (en) | Optical fiber humidity sensor with temperature calibration function | |
| CN107495931B (en) | Human body temperature field measurement device based on optical principle | |
| CN115452196A (en) | A device and method for testing the high-precision temperature sensitivity coefficient of an optical fiber sensitive ring | |
| CN209490005U (en) | A kind of Fibre Optical Sensor unit and the sensing probe for measuring vascular pressure | |
| CN208350127U (en) | A kind of mid-infrared light fiber sensor of many reference amounts measurement | |
| RU186068U1 (en) | Sapphire cell for intra-wave terahertz spectroscopy | |
| Abdulkareem et al. | PCF-multimode/endless fiber sensor for respiratory rate monitoring | |
| Yoo et al. | Chalcogenide optical fiber based sensor for non-invasive monitoring of respiration | |
| Chetia et al. | Low-cost refractive index sensor with optical fibers attached to a U-shaped glass tube | |
| Silva et al. | Refractive index sensing using a multimode interference-based fiber sensor in a cavity ring-down system | |
| CN214277359U (en) | A gain fiber absorption coefficient measurement device based on side scattered light detection | |
| Dutta et al. | Integrating optical glucose sensing into a planar waveguide sensor structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210907 Termination date: 20220108 |