36results about How to "High temperature measurement sensitivity" patented technology

The invention discloses a photonic crystal fiber grating temperature sensor based on liquid filling and a manufacturing method thereof. The photonic crystal fiber grating temperature sensor comprises a photonic crystal fiber cladding, wherein a germanium-doped fiber core is located at a center axis position in the fiber cladding; a Bragg grating structure is engraved on the surface of the fiber core; air vents are arranged along the axial direction of the fiber cladding and are distributed around the fiber core to form a multilayer matrix structure; and an index matching liquid with a thermal and light sensitive effect is filled in the air vents. The temperature sensitive property of the fiber Bragg grating temperature sensor is improved by filling the index matching liquid with the thermal and light sensitive effect into the air vents of the fiber cladding. By utilizing the photonic crystal fiber grating structure for filling liquid, the liquid thermal and light sensitive effect of a cladding area exists besides the liquid thermal and light sensitive effect and the heat expansion effect of a core area grating. The liquid thermal and light sensitive degree of the liquid is far better than that of a solid so that the photonic crystal fiber grating temperature sensor disclosed by the invention can obtain the thermal and light sensitive coefficient which are improved by 1-2 magnitude orders compared with that of the existing product.

The invention provides a fluorescence intensity ratio temperature measurement method based on a mixed temperature sensing material. The invention relates to the fluorescence intensity ratio temperature measurement method based on the mixed temperature sensing material. The purpose of the invention is to solve the problem that a temperature measurement method in a high temperature range cannot haveboth high sensitivity and low uncertainty. The method comprises the steps that (1) an Eu3+: AVO4 and Cr3+: Al2O3 mixed material is used as the temperature sensing material; and (2) in the temperaturerange of 543 to 673K, the fluorescence intensity ratio I618 / I694 gradually increases with temperature, has a monotonic function relationship with temperature T, and can be fitted by a polynomial, sothat the temperature can be measured by monitoring the fluorescence intensity ratio. The temperature measurement method provided by the invention has the advantages of good repeatability, high sensitivity and low uncertainty, and is applied to the field of rare earth fluorescence temperature measurement.

The invention discloses a rare-earth organic framework material for fluorescent temperature sensation imaging in biological tissue and cells. The rare-earth organic framework material has the long-range ordered crystal structure and regular pores. The chemical formula is [LnLx(G)(H2O)].(G)n, wherein Ln is rare earth Eu or Tb, L is an organic ligand simultaneously containing benzene carboxylic acid group and triazinyl group, G represents a solvent molecule which is coordinated with rare-earth ions or in the crystal pores, x=1-3, and n=1-4. The rare-earth organic framework material is prepared by the solvothermal method which is simple and has higher yield. The micro / nano rare-earth organic framework material has the characterized light emissions of two types of rare-earth ions; the strength ratio of the two peaks has favorable exponential relation to the temperature; the temperature detection range is 20-80 DEG C; as the temperature increases, the luminous color can turn red from green; and the rare-earth organic framework material has favorable biocompatibility and heat stability, can implement real-time temperature imaging in biological tissues, and is hopeful to be applied in the aspects of biomedical treatment and the like.

The invention relates to a fluorescence intensity ratio temperature measuring method based on a double-wavelength light source. The invention aims to settle a problem of quick relative sensitivity reduction in a relatively high temperature interval in existing rare earth ion fluorescent intensity temperature measuring technology. According to the method, in a temperature range of 303-783K, the intensity ratio of green fluorescent light which is emitted from rare earth Tb3+ ion after light splitting of xenon lamp through excitation of a light source with wavelengths of 310nm and 378nm and has acentral wavelength of 545nm. The function relation between the intensity ratio and temperature is a temperature measuring curve. The function relation can be used for measuring the temperature in anunknown environment. Based on the method, temperature response with higher sensitivity can be obtained in a relatively high temperature range, and the sensitivity is remarkably higher than the sensitivity which can be realized in current routine optical methods. The fluorescence intensity ratio temperature measuring method is applied to the field of fluorescence intensity ratio temperature measurement.

The invention discloses a method for producing a planar thermopile for thermometers capable of rapidly measuring the distribution of the surface temperature difference between two objects placed on the same level. The method has the following four characteristics: the thermopile is a replaceable element, the number of thermocouples forming the thermopile can be conveniently changed by adjusting the processing technique, a produced thermopile temperature sensor has 200 sets of thermocouples in the area of 85mm multiplied by 50mm, and according to need, the number of the thermocouples can be increased by reducing the line width and the distance between lines. The time constant of the thermopile is low, and transient temperature difference can be measured. The surface area of the thermopile can be changed according to requirement in order to be adapted to temperature difference measurement at different distances. The structure of the thermopile is compact and simple, and the thermopile is convenient to mount, and can be used for measuring little heat.

The invention discloses a lanthanum-oxide-added binary thermistor material. The thermistor material comprises the following components in percentages by weight: 70%-80% of Mn2O3, 10%-28% of Co2O3 and 0.5%-2.0% of lanthanum oxide. According to the manganese-cobalt binary formula disclosed by the prior art, if the B value is required to obtain 5,500-6,000K under the condition of not adding special additives, the resistivity can only be 10,000-50,000 (kOmega.mm), and the B value of the lanthanum-oxide-added binary thermistor material is 5,500-6,000K and the resistivity is 150-300 (kOmega.mm). The lanthanum-oxide-added binary thermistor material has relatively large B value, the resistivity can be more moderate and applied in a wide range, the temperature sensitivity is relatively high and the lanthanum-oxide-added binary thermistor material has relatively strong stability.

The invention discloses a high-sensitivity temperature measurement method based on near-infrared fluorescence of different rare earth ions. Near-infrared light of Nd < 3 + > ions near 710 nm to 920 nmand near Er < 3 + > ions near 1400 nm to 1700 nm at different temperatures is measured, the fluorescence intensities of the two wave bands are compared, and then the function relation between FIR andthe temperature is obtained. And when the sample wafer is placed in an environment to be measured, the fluorescence intensity ratio is calculated, and the temperature of the environment to be measured is calculated by utilizing the function relationship. The two temperature measuring light bands are from the non-thermal coupling energy level, no overlapping exists, and data processing is facilitated. Meanwhile, the infrared light of Er < 3 + > belongs to a down-conversion process, the quantum yield is high, the pumping power of the required laser is small, and higher fluorescence intensity can be obtained. Meanwhile, the change trends of the intensities of the two fluorescence along with the temperature are opposite, and compared with the result that the intensities of the two fluorescence bands used in the prior art are the same or close to each other along with the temperature change trend, the temperature measurement sensitivity is higher.

The invention discloses a light pulse external modulation type distributed optical fiber temperature sensing device. An external modulation light-emitting unit is used for outputting the high-power narrow pulsed light needed by the system. The device has the following advantages and positive effects: the effects caused by instability of the light source and coupling loss, optical fiber splice loss, optical fiber bending loss, optical fiber transmission loss and the like in the optical fiber transmission process can be effectively eliminated by adopting Rayleigh scattering light as the contrast signal; and the Raman scattering light after combination and the Rayleigh scattering light are stronger, and the stronger scattering light signal can be detected if the input light source power is lower, thus overcoming the contradiction between the incident light power and the nonlinearity of scattering light and improving the temperature measuring sensitivity of the system.

The invention discloses a coal mine underground belt fire alarm system. The coal mine underground belt fire alarm system mainly includes a humidity measurement module, a temperature measurement module, a gas measurement module, a visibility measurement module, an infrared temperature measurement module, a Socket server, a Web server, an alarm module and a communication network; and the fire alarmsystem has the advantages of wide monitoring range and high temperature measurement sensitivity. Based on the radiation temperature measurement principle and the atmospheric transmissivity theory, thegray value of an infrared video image and calculated air transmissivity in the environment are creatively used for calculating and obtaining the real-time temperature image of a belt to be measured,temperature monitoring is more accurate and reliable, at the same time, real-time monitoring of a coal mine belt conveyor in a large range can be realized, and the problems of high false alarm rate, small monitoring coverage range, and high monitoring cost of a whole coal mine belt are overcome when an existing belt conveyor fire monitoring system is in use.

The invention discloses a europium ion multivalent double-center optical temperature probe material BaAl2B2O7: Eu < 2 + > / Eu < 3 + >, the material is prepared by a high-temperature solid-phase carbon thermal reduction method, Eu < 3 + > is partially reduced by carbon powder, two luminescence centers of Eu < 3 + > and Eu < 2 + > are obtained, and the fluorescent temperature measurement material has a self-calibration characteristic. The material can simultaneously generate a plurality of characteristic emission peaks of Eu < 2 + > and Eu < 3 + > under the excitation of ultraviolet light, the strongest emission peaks of Eu < 2 + > and Eu < 3 + > are respectively positioned at 375nm and 613nm, and the temperature is calibrated by monitoring the two characteristic emission peaks and utilizing a fluorescence intensity ratio technology. The temperature detection material has the advantages of high absolute sensitivity (Sa: 0.023 K <-1 >) and relative sensitivity (Sr: 3.505% K <-1 >), wide temperature measurement range (303K-503K), high signal resolution and the like, and can be applied to non-contact temperature measurement.

The invention provides an optical temperature sensing material and application thereof, the material is an optical temperature sensing material SrZn0. 33Nb0. 67O3: Pr < 3 + > based on a non-thermal coupling energy level of Pr < 3 + >, the material is prepared by a high temperature solid phase method, and the material generates emission peaks with wavelengths at 491 nm, 619 nm and 651 nm under the excitation of ultraviolet light, and the emission peaks are respectively derived from transition emission of Pr < 3 + >: 3P0-3H4, 1D2-3H4 and 3P0-3F2. The fluorescence intensity ratio of the emission peak at the 619 nm to the emission peak at the 491 nm and the fluorescence intensity ratio of the emission peak at the 651 nm are both in significant positive correlation with the temperature, and the fluorescent probe can be applied to temperature monitoring and can be mutually verified to reduce measurement errors. And Ga < 3 + > ions are doped in SrZn < 0.33 > Nb < 0.67 > O3: Pr < 3 + >, so that the trend that the fluorescence intensity ratio changes along with the temperature is remarkably enhanced, and the temperature measurement sensitivity of the material is effectively improved.

The invention provides a hydraulic system for a combined machine tool. The hydraulic system comprises a base, a hydraulic pump assembly, an oil hydraulic circuit and an electromagnetic sandwich valve assembly; the hydraulic pump assembly, the oil hydraulic circuit and the electromagnetic sandwich valve assembly are located on the base and are fixedly connected with the base; the electromagnetic sandwich valve assembly comprises a tail frame sandwich valve set, a milling head box locking sandwich valve set, a grinding head box locking sandwich valve set, a chuck sandwich valve set and a multi-connected bottom plate block; and the tail frame sandwich valve set, the milling head box locking sandwich valve set, the grinding head box locking sandwich valve set and the chuck sandwich valve set are located at the upper end of the multi-connected bottom plate block and are fixedly connected with the multi-connected bottom plate block. The hydraulic system is compact in structure and has the beneficial effects of being flexible in configuration, integrated and general.

The invention belongs to the technical field of temperature sensors, and relates to a device and method for improving precision and sensitivity of fluorescent fiber temperature measurement, and the device comprises a noise reduction circuit which comprises a photodiode ip, a resistor RD, a feedback resistor Rf, capacitors CD, Cin and Cs, an amplifier input current noise Ei, an amplifier input voltage noise Eu, a feedback resistance noise Er, and an operational amplifier. Therefore, the temperature measurement precision is improved to + / -0.15 DEG C from the original + / -1 DEG C; according to the method, data collected on a fluorescence decay curve is subjected to segmented processing, the number of natural logarithms and the number of least square methods are greatly reduced, the refresh rate of temperature measurement data is increased, meanwhile, in order to increase the calculation speed, the temperature measurement sensitivity reaches 30 Hz, and therefore the method has higher measurement precision and better measurement sensitivity.

The invention discloses a high-sensitivity temperature measurement method based on near-infrared fluorescence of different rare earth ions. By measuring different temperatures, Nd 3+ ions around 710nm‑920nm and Er 3+ The near-infrared light of ions near 1400nm‑1700nm compares the fluorescence intensities of the two bands to obtain the functional relationship between FIR and temperature. When the sample is placed in the environment to be tested, the fluorescence intensity ratio is calculated, and the temperature of the environment to be tested is obtained by using the above functional relationship. The two temperature-measuring light bands used in the present invention come from non-thermally coupled energy levels without any overlap, which facilitates data processing. At the same time, Er 3+ The infrared light belongs to the down-conversion process, the quantum yield is high, the pumping power of the required laser is small, and higher fluorescence intensity can be obtained. At the same time, the two fluorescence intensities have opposite trends with temperature. Compared with the result that the intensities of the two fluorescence bands used in the current technology have the same or close variation with temperature, the temperature measurement sensitivity of the present invention is greater.

The invention relates to an optical temperature measurement material with high sensitivity and signal discrimination, a preparation method and application thereof. The optical temperature measurement material has an atomic ratio composition represented by general formula (I): Sr 3 La (1‑x‑y) Na(PO 4 ) 3 F:Tb x , Eu y (I), wherein, 0.01≤x≤0.5, 0.005≤y≤0.5, 0.015≤x+y≤1, which is prepared by a high-temperature solid-phase method; under the effective excitation of ultraviolet light, the Tb 3+ with Eu 3+ As the dual luminescent centers simultaneously emit their respective characteristic spectra, by monitoring the two characteristic spectra, the temperature is calibrated by using the fluorescence intensity ratio of the dual luminescent centers. Compared with the prior art, the temperature measurement material of the present invention has a large signal discrimination (545nm / 700nm), high temperature measurement sensitivity (relative temperature measurement sensitivity is about 0.70% / K), and a wide temperature measurement range (303K-483K) .

The invention provides an up-conversion nanoparticle and a preparation method thereof, and application of the up-conversion nanoparticle in non-contact temperature measurement. The molecular formula of the up-conversion nanoparticle is CaF<2>: Yb<3+> / Er<3+>. The preparation method comprises the following steps: mixing a Ca<2+> salt, a Yb<3+> salt, an Er<3+> salt and water, dropwise adding an aqueous solution in which NaF is dissolved, carrying out a hydrothermal synthesis reaction, and carrying out purifying to obtain the up-conversion nanoparticle. The up-conversion nanoparticle prepared by the invention has the characteristics of good biocompatibility, strong fluorescence emission and the like, can be excited by near-infrared light and realize non-contact fluorescence temperature measurement, and is particularly suitable for temperature measurement of living organisms, so the up-conversion nanoparticle has good practical application value.

The invention relates to a multilayer thin-film type temperature-sensitive thermo-responsive chip with a high sensitivity. The temperature-sensitive thermo-responsive chip comprises a substrate, a ceramic body, and two metal end electrodes. The surface of the substrate is divided into a middle area and two end areas respectively arranged at two sides of the middle area. The ceramic body is arranged at the middle area. The two metal end electrodes are respectively arranged at the two end areas. The ceramic body is of a tortuous connected layered structure, which is formed by laminating N layersof ceramic films at intervals, wherein N is a natural number greater than or equal to 2. A metal film is arranged between each two adjacent ceramic films, and a metal film is arranged between the bottommost ceramic film and the substrate. Each metal film is only connected with one of the metal end electrodes. The invention further relates to a preparation method of the multilayer thin-film type temperature-sensitive thermo-responsive chip with the high sensitivity. According to the temperature-sensitive thermo-responsive chip, the small size, the low resistance value and the high B value canbe realized at the same time.

The invention provides an FBG-based high-temperature sensor and a working and manufacturing method thereof. The high-temperature sensor comprises two FBG channels with different functions; one FBG channel is used as a temperature compensation channel of the sensor, and the other FBG channel is used as an indirect temperature measurement channel of the sensor; the two channels respectively comprisean FBG and have the same packaging structure; the high-temperature sensor further comprises an FBG packaging sheet which is used for packaging and protecting a bare optical fiber containing the FBG,and a pushing structure which acts on the FBG packaging sheet as a power source of the sensor. The sensor has the advantages of being small in size, high in high-temperature sensitivity, high in temperature measurement precision and the like, and has good convenience in the aspect of integrated networking under the high-temperature working condition. The characteristics of the sensor determine that the sensor is especially suitable for aerospace, hot well oil fields, civil engineering fire protection and other fields related to high-temperature sensing.

The invention discloses a method for producing a planar thermopile for thermometers capable of rapidly measuring the distribution of the surface temperature difference between two objects placed on the same level. The method has the following four characteristics: the thermopile is a replaceable element, the number of thermocouples forming the thermopile can be conveniently changed by adjusting the processing technique, a produced thermopile temperature sensor has 200 sets of thermocouples in the area of 85mm multiplied by 50mm, and according to need, the number of the thermocouples can be increased by reducing the line width and the distance between lines. The time constant of the thermopile is low, and transient temperature difference can be measured. The surface area of the thermopile can be changed according to requirement in order to be adapted to temperature difference measurement at different distances. The structure of the thermopile is compact and simple, and the thermopile is convenient to mount, and can be used for measuring little heat.

The invention claims a fluorescence intensity ratio temperature measurement method based on charge transfer band edge anomalous thermal quenching, and the invention relates to a fluorescence intensity ratio temperature measurement method based on charge transfer band anomalous thermal quenching. The purpose of the present invention is in order to solve the problem that traditional based on rare earth ion thermal coupling energy level fluorescence intensity ratio temperature measurement sensitivity is lower, method: (1) with Eu 3+ :NaLaCaWO 6 It is a temperature-sensitive material; (2) In the temperature range from 298K to 528K, the fluorescence intensity ratio I 308 / I 354 As the temperature increases, it gradually increases, and there is a monotonous functional relationship with the temperature T. The functional relationship between the intensity ratio and temperature is the temperature measurement curve, and the purpose of temperature measurement can be achieved by monitoring the fluorescence intensity ratio. The temperature measurement sensitivity obtained by the temperature measurement method of the present invention can reach 2.23%K at 298K ‑1 . Compared with the traditional temperature measurement method, the sensitivity at 298K is increased by 4.37 times. The temperature measuring method of the invention has higher sensitivity. The invention is applied to the field of rare earth fluorescence temperature measurement.

The invention relates to a method for improving the temperature measurement sensitivity of the fluorescence intensity ratio technology in the high temperature range by utilizing a double luminescence center strategy. The purpose of the present invention is to solve the problem that it is difficult to realize high-precision temperature measurement in a higher temperature range by using traditional fluorescence intensity ratio temperature measurement technology. Method: (1) prepare temperature measurement samples; (2) at low temperature Interval utilizes traditional Er 3+ of 2 h 11 / 2 - 4 I 15 / 2 and 4 S 3 / 2 - 4 I 15 / 2 The fluorescent band is used for temperature measurement, and the Er is used in the high temperature range 3+ of 4 S 3 / 2 - 4 I 15 / 2 and Tm 3+ of 3 f 3 - 3 h 6 The fluorescent band generated by the transition is used for temperature measurement; the present invention utilizes the dual luminescence center strategy to effectively improve the temperature measurement sensitivity of the fluorescence intensity ratio technology in a higher temperature range, and the present invention is applied to the field of rare earth fluorescence temperature measurement.

The invention discloses a lanthanum-oxide-added binary thermistor material. The thermistor material comprises the following components in percentages by weight: 70%-80% of Mn2O3, 10%-28% of Co2O3 and 0.5%-2.0% of lanthanum oxide. According to the manganese-cobalt binary formula disclosed by the prior art, if the B value is required to obtain 5,500-6,000K under the condition of not adding special additives, the resistivity can only be 10,000-50,000 (kOmega.mm), and the B value of the lanthanum-oxide-added binary thermistor material is 5,500-6,000K and the resistivity is 150-300 (kOmega.mm). The lanthanum-oxide-added binary thermistor material has relatively large B value, the resistivity can be more moderate and applied in a wide range, the temperature sensitivity is relatively high and the lanthanum-oxide-added binary thermistor material has relatively strong stability.

The invention discloses a temperature measurement method by using a fluorescence single-peak width temperature response characteristic. The method comprises the following steps: step 1, cooling or heating fluorescent material; performing heat preservation at a plurality of set temperature points, and recording the temperature value of each temperature point during the heat preservation period; step 2, at each temperature point, collecting a fluorescent single peak of the fluorescent material by adopting a Raman spectrometer, and fitting and analyzing the fluorescent single peak to obtain a full width at half maximum value of the fluorescent single peak corresponding to each temperature point; step 3, establishing a half height and width temperature standard curve according to the temperature value of each temperature point and the half height and width value of the fluorescent single peak corresponding to each temperature point obtained in the step 2; step 4, placing the fluorescent material in a to-be-measured temperature field, collecting a fluorescent single peak of the fluorescent material, and fitting and analyzing the fluorescent single peak to obtain a half height and width value of the fluorescent single peak; step 5, calculating the measured value of the temperature field to be measured, and completing the measurement. According to the invention, the problem that the fluorescence intensity ratio temperature measurement technology needs to meet high sensitivity, high precision and small measurement error at the same time is solved.

The invention discloses a rare-earth organic framework material for fluorescent temperature sensation imaging in biological tissue and cells. The rare-earth organic framework material has the long-range ordered crystal structure and regular pores. The chemical formula is [LnLx(G)(H2O)].(G)n, wherein Ln is rare earth Eu or Tb, L is an organic ligand simultaneously containing benzene carboxylic acid group and triazinyl group, G represents a solvent molecule which is coordinated with rare-earth ions or in the crystal pores, x=1-3, and n=1-4. The rare-earth organic framework material is prepared by the solvothermal method which is simple and has higher yield. The micro / nano rare-earth organic framework material has the characterized light emissions of two types of rare-earth ions; the strength ratio of the two peaks has favorable exponential relation to the temperature; the temperature detection range is 20-80 DEG C; as the temperature increases, the luminous color can turn red from green; and the rare-earth organic framework material has favorable biocompatibility and heat stability, can implement real-time temperature imaging in biological tissues, and is hopeful to be applied in the aspects of biomedical treatment and the like.

The invention discloses a fluorescence intensity ratio temperature measurement method based on charge migration band edge abnormal thermal quenching, and relates to a fluorescence intensity ratio temperature measurement method based on charge migration band abnormal thermal quenching. The invention aims to solve the problem that the traditional temperature measurement sensitivity based on the rareearth ion thermal coupling energy level fluorescence intensity ratio is lower. The method comprises the following steps that: (1) Eu<3+>: NaLaCaWO6 is taken as a temperature sensing material; and (2)in a temperature interval from 298 K to 528 K, the fluorescence intensity ratio I308 / I354 is gradually increased along with the rise of the temperature and has a monotonous function relationship withthe temperature T, the function relationship between the intensity ratio and the temperature is a temperature measurement curve, and the purpose of temperature measurement can be achieved by monitoring the fluorescence intensity ratio. The temperature measurement sensitivity obtained by the temperature measurement method disclosed by the invention can reach 2.23% K1 at 298 K. Compared with a traditional temperature measurement method, the method has the advantage that the sensitivity at 298 K is improved by 4.37 times. The temperature measuring method provided by the invention has high sensitivity. The method is applied to the field of rare earth fluorescence temperature measurement.

The invention relates to a high-precision, high-reliability, multi-layer, low-resistance thermosensitive chip, which includes a ceramic body, a surface electrode arranged on the top surface of the ceramic body, a bottom electrode arranged on the bottom surface of the ceramic body, and N electrodes arranged inside the ceramic body An electrode layer, N is an even number greater than or equal to 2; the ceramic body is composed of N+1 ceramic layers stacked, and an electrode layer is arranged between every two adjacent ceramic layers, and one side of the ceramic body is opened There are first holes penetrating through No. 1 to No. N ceramic layers, and second holes penetrating No. 2 to No. N+1 ceramic layers are opened on the other side, the first holes are filled with first hole electrodes, and the second holes are The second holes are filled with second hole electrodes. The invention also relates to a manufacturing method of the high-precision, high-reliability, multi-layer, low-resistance thermal chip. The high-precision, high-reliability, multi-layer, low-resistance heat-sensitive chip of the invention can realize small size, low resistance value and high B value at the same time.

The invention discloses an optical fiber temperature sensor based on a nano fluorescent material and a measuring system. The optical fiber temperature sensor comprises a multimode optical fiber (1) and a hollow-core optical fiber (2) which are connected with each other and have flat end surfaces, and a fluorescent material body (4), wherein the structure of the optical fiber temperature sensor is divided into (a) a reflection type optical fiber temperature sensor structure and (b) a transmission type optical fiber temperature sensor structure. According to the invention, an optical fiber temperature sensing and measuring system based on a nanometer fluorescent material is built by using the optical fiber temperature sensor based on the nanometer fluorescent material as a sensing unit, and comprises a 980 nm pump light source (5), a reflection type optical fiber temperature sensor (6) based on a nano fluorescent material or a transmission type optical fiber temperature sensor (10) based on the nano fluorescent material, an optical fiber coupler (9), a spectrograph (7) and a computer (8), wherein temperature measurement and processing are realized by utilizing a reflection spectrum or laser; and compared with the prior art, the optical fiber temperature sensor of the invention has higher temperature measurement sensitivity.