Temperature measuring device and temperature measuring method

Abstract

The present application discloses a temperature measurement device and a temperature measurement method, which relate to the fields of power and electrical science and technology. A temperature measurement device includes an optical fiber measurement component, which includes an optical fiber body and an optical fiber grating, wherein the optical fiber body is provided with a plurality of optical fiber gratings, and the subject to be measured includes a pipeline, wherein at least one optical fiber grating is provided on the pipeline; a laser modulator, wherein the laser modulator is connected to the optical fiber body; the laser emitted by the laser modulator is transmitted along the optical fiber body to the optical fiber grating, and is reflected by the optical fiber grating and returned, and is received and demodulated by the laser modulator. A temperature measurement method includes: emitting laser light through a laser modulator, and transmitting it to the optical fiber grating; reflecting the laser light through the optical fiber grating; receiving the returned laser light through a laser modulator and demodulating it. The present application can solve the problems of high cost, complex system, and large space occupied by thermocouple or thermal resistor temperature measurement methods.

Description

Technical Field

[0001] The present application belongs to the field of power and electrical science and technology, and specifically relates to a temperature measurement device and a temperature measurement method. Background Art

[0002] In various industrial boilers, the temperature conditions of various equipment in industrial boilers are usually measured using thermocouples or thermal resistors. However, as power station boilers develop towards large-capacity, high-parameter units, the number of heating surface tubes is extremely large. On the inlet and outlet sections of each heating surface tube, the wall temperature difference of the furnace tube is large due to factors such as uneven heat absorption, uneven flow and uneven structure.

[0003] In order to monitor the temperature of the furnace tube more accurately, it is necessary to set more temperature measuring points on the side wall of the furnace tube, and set a thermocouple or thermal resistor at each temperature measuring point, which requires a large number of thermocouples or thermal resistors. The compensation wire required for each thermocouple or thermal resistor is as long as 20 to 30 meters, which makes the temperature measurement system more complicated, more expensive, and occupies a large space, which cannot be realized in actual production. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a temperature measurement device and a temperature measurement method, which can solve the problems of complex temperature measurement system, high cost, and large space occupation caused by thermocouple or thermal resistor temperature measurement methods.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] The embodiment of the present application provides a temperature measurement device for measuring the temperature of a subject to be measured, and the temperature measurement device includes:

[0007] An optical fiber measurement component, the optical fiber measurement component comprises an optical fiber body and an optical fiber grating, the optical fiber body is provided with a plurality of the optical fiber gratings, the subject to be measured comprises a pipe, and at least one optical fiber grating is arranged on a side wall of the pipe;

[0008] A laser modulator, which is connected to the optical fiber body and is used to emit laser light or receive laser light;

[0009] The laser emitted by the laser modulator is transmitted along the optical fiber body to the optical fiber grating, reflected by the optical fiber grating and returned along the optical fiber body, and the returned laser is received by the laser modulator.

[0010] The present application also provides a temperature measurement method, which is applied to the above-mentioned temperature measurement device. The temperature measurement method includes:

[0011] The laser modulator emits laser light to the optical fiber body, and transmits the laser light along the optical fiber body to the optical fiber grating;

[0012] Reflecting the laser light through the fiber grating and returning the laser light along the fiber body;

[0013] The returned laser light is received and demodulated by the laser modulator to obtain the temperature value of the temperature measuring point.

[0014] In the embodiment of the present application, by arranging a fiber Bragg grating on the side wall of the pipeline, the fiber Bragg grating can be used to measure the temperature of the side wall of the pipeline. Compared with the temperature measurement method using a thermocouple or a thermistor, the present application can measure the temperature of the side wall of the pipeline through multiple fiber Bragg gratings, thereby eliminating the need to use a large number of thermocouples or thermistors, and eliminating the need to use compensation wires, which can save a large amount of metal materials and compensation wires and greatly reduce costs. At the same time, due to the reduction in structural parts, the entire temperature measurement system is no longer complicated and the corresponding occupied space is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a temperature measurement device disclosed in an embodiment of the present application;

[0016] Figure 2 A schematic diagram of the fiber Bragg grating disclosed in the embodiment of the present application being arranged on the subject to be measured in the first manner;

[0017] Figure 3 A schematic diagram of the fiber Bragg grating disclosed in the embodiment of the present application being arranged on the subject to be measured in the second manner;

[0018] Figure 4 A schematic diagram of the fiber Bragg grating disclosed in the embodiment of the present application being arranged on the subject to be measured in a third manner;

[0019] Figure 5 This is a schematic diagram of the fiber Bragg grating disclosed in the embodiment of the present application being arranged on the subject to be measured in the fourth manner;

[0020] Figure 6 This is a schematic diagram of the temperature measurement method disclosed in an embodiment of the present application.

[0021] Description of reference numerals:

[0022] 100-fiber measurement component; 110-fiber body; 120-fiber Bragg grating; 130-packaging jacket;

[0023] 200-Laser modulator;

[0024] 300-subject to be measured; 310-pipeline;

[0025] 400-Heat collector block. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0028] The embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0029] refer to Figures 1 to 5 The embodiment of the present application discloses a temperature measuring device for measuring the temperature of a subject 300 to be measured. The subject 300 to be measured may be a power station boiler. The temperature measuring device may be used to measure the temperature of the furnace tube of the power station boiler, thereby monitoring the temperature of each device of the power station boiler to ensure the safe operation of the power station boiler. In addition, the temperature measuring device may also be applied to other scenarios, and the embodiment of the present application does not limit the application scenarios of the temperature measuring device.

[0030] refer to Figure 1 The disclosed temperature measurement device includes an optical fiber measurement component 100 and a laser modulator 200. The optical fiber measurement component 100 includes an optical fiber body 110 and an optical fiber grating 120, and a plurality of optical fiber gratings 120 are arranged on the optical fiber body 110. Optionally, the optical fiber body 110 can be a long optical fiber structure, such as an optical fiber cable, an optical fiber bundle, etc. The plurality of optical fiber gratings 120 are arranged on the optical fiber body 110 at intervals along the length direction of the optical fiber body 110. At the same time, the plurality of optical fiber gratings 120 are also connected to the optical fiber body 110, so that signal transmission between the optical fiber grating 120 and the optical fiber body 110 can be realized. Optionally, in an embodiment of the present application, an FBG optical fiber grating can be used.

[0031] In some embodiments, multiple fiber gratings 120 may be directly engraved on the optical fiber body 110; in addition, each fiber grating 120 may be connected to the optical fiber body 110 through a wire harness. In this case, the fiber grating 120 may have a certain distance relative to the optical fiber body 110, thereby improving the adaptability and convenience of the installation of the fiber grating 120.

[0032] In the embodiment of the present application, the optical fiber measurement assembly 100 is used to measure the temperature of a subject 300 to be measured. The subject 300 to be measured includes a pipe 310, and at least one optical fiber grating 120 is arranged on the side wall of the pipe 310.

[0033] Optionally, when the temperature measuring device is applied to a boiler, the pipe 310 is a furnace pipe, which is not limited to heat exchange pipes in power station boilers and industrial boilers, but can also be heat exchange pipes in various heat exchangers, such as heat exchange pipes in heat exchange products such as refrigerators and air conditioners. At the same time, the pipe 310 can be a small-diameter furnace pipe, but is not limited to a small-diameter pipe, and can also be various heat exchangers and working medium delivery pipes with larger diameters.

[0034] Optionally, the main body 300 to be measured may include multiple pipes 310, and a fiber grating 120 is respectively set on the side wall of each pipe 310. In this case, multiple fiber gratings 120 can be correspondingly set on multiple pipes 310, and multiple fiber gratings 120 are connected to the optical fiber body 110, so that the temperatures on multiple pipes 310 can be measured separately by multiple fiber gratings 120.

[0035] Optionally, the subject 300 to be measured may include multiple pipes 310, and multiple fiber gratings 120 are arranged on the side wall of each pipe 310. In this case, the multiple fiber gratings 120 on each pipe 310 may be arranged along the length direction of the pipe 310, or along the periphery of the pipe 310. Of course, other arrangements may be selected according to actual needs. In this way, the temperature at different positions on the side wall may be detected simultaneously by the multiple fiber gratings 120 on each pipe 310.

[0036] In the embodiment of the present application, the laser modulator 200 is a device for emitting and receiving laser light in the temperature measurement device. The laser modulator 200 is connected to the optical fiber body 110 so as to emit laser light to the optical fiber body 110 and receive laser light returned from the optical fiber body 110.

[0037] During the operation of the temperature measuring device, the laser modulator 200 emits a laser of a certain wavelength to the optical fiber body 110. When the laser is transmitted to the optical fiber grating 120, a part of the laser is reflected by the optical fiber grating 120 and then returns along the optical fiber body 110. The returned laser is received and demodulated by the laser modulator 200.

[0038] Based on the above settings, when the temperature at the location of the fiber grating 120 on the pipeline 310 changes, due to the effect of thermal expansion and contraction, the period of the grating stripes of the fiber grating 120 changes, thereby changing the wavelength of the laser reflected by the fiber grating 120, and after being received and demodulated by the laser modulator 200, the temperature value is displayed. Compared with the method of measuring temperature by thermocouples or thermal resistors, the temperature is measured by the fiber grating 120 in the embodiment of the present application, which has the advantages of large dynamic range, high sensitivity, fast response, anti-electromagnetic interference, etc., and is suitable for multi-point temperature measurement. At the same time, there is no need to use a large number of thermocouples or thermal resistors, and there is no need to use compensation wires, which can save a lot of metal materials and compensation wires, greatly reducing the cost. At the same time, due to the reduction of structural parts, the entire temperature measurement system is no longer complicated, and the corresponding occupied space is reduced. In addition, a plurality of fiber gratings 120 are arranged on the optical fiber body 110, so as to realize multi-point temperature measurement of the subject 300 to be measured, which greatly simplifies the temperature measurement system, improves the measurement efficiency, meets industrial needs, and can realize large-scale industrial applications.

[0039] The temperature measurement device in the embodiment of the present application can be applied to a power station boiler. In this case, the fiber Bragg grating 120 is laid on the side wall of the furnace tube of the power station boiler and ensures good contact, so as to accurately reflect the temperature of the side wall of the furnace tube. The laser modulator 200 emits a laser of a certain wavelength. When the temperature of the contact area between the fiber Bragg grating 120 and the furnace tube changes, the period of the grating stripes of the fiber Bragg grating 120 changes, so that the wavelength of the laser reflected by the fiber Bragg grating 120 changes. The laser modulator 200 receives the reflected laser and demodulates it, so as to display the temperature value of the temperature measuring point on the furnace tube. It should be noted that the specific working principle of the laser modulator 200 can be found in the relevant technology, which will not be elaborated in detail here.

[0040] Furthermore, the temperature measuring device can be arranged in the furnace top bag of the power station boiler, and the furnace top bag can be regarded as a simplified heat preservation box, and the laser modulator 200 is arranged in a normal temperature environment outside the power station boiler. Of course, the temperature measuring device is not limited to being arranged in the furnace top bag, but can also be arranged in each intermediate header or furnace, etc.

[0041] refer to Figure 2In the first embodiment, the temperature measurement device includes a set of optical fiber measurement components 100, and the main body 300 to be measured includes a plurality of pipes 310 arranged in parallel, wherein the optical fiber body 110 in the set of optical fiber measurement components 100 extends along the arrangement direction of the plurality of pipes 310, and the plurality of optical fiber gratings 120 on the optical fiber body 110 are connected to the plurality of pipes 310 in a one-to-one correspondence. Optionally, a plurality of optical fiber gratings 120 are engraved on an optical fiber body 110, and the optical fiber body 110 is extended along the arrangement direction of the plurality of pipes 310, that is, the optical fiber body 110 is connected to the plurality of pipes 310, so that a optical fiber grating 120 is provided on each pipe 310, and the optical fiber grating 120 on each pipe 310 is connected to the optical fiber body 110. In this way, the temperature on the plurality of pipes 310 can be measured separately by the optical fiber measurement component 100 to obtain the temperature of the temperature measurement point on each pipe 310. In this case, it is not necessary to install a thermocouple or a thermal resistor on each pipe 310 , which can simplify the measurement system and improve the measurement efficiency to a certain extent.

[0042] refer to Figure 3 In a second embodiment, the temperature measurement device includes a plurality of fiber optic measurement components 100, the main body 300 to be measured includes a plurality of pipes 310 arranged in parallel, and the plurality of fiber optic measurement components 100 are arranged at intervals along the extending direction of the pipes 310. The fiber bodies 110 in each group of fiber optic measurement components 100 extend along the arrangement direction of the plurality of pipes 310, and the plurality of fiber gratings 120 on the fiber bodies 110 are connected to the plurality of pipes 310 in a one-to-one correspondence. Optionally, a plurality of fiber gratings 120 are engraved on the fiber bodies 110 in each group of fiber optic measurement components 100, and the fiber bodies 110 in each group of fiber optic measurement components 100 are extended along the arrangement direction of the plurality of pipes 310, that is, the fiber bodies 110 are arranged crosswise with the plurality of pipes 310.

[0043] Based on the above configuration, a plurality of fiber gratings 120 are arranged on each pipe 310, and the plurality of fiber gratings 120 on each pipe 310 are respectively connected to the fiber bodies 110 in a plurality of different fiber optic measurement assemblies 100. In this way, the laser reflected by the fiber grating 120 on each pipe 310 can be respectively transmitted through the fiber bodies 110 in the plurality of fiber optic measurement assemblies 100, so that the temperature value of each temperature measurement point on each pipe 310 can be known.

[0044] At the same time, the multiple fiber gratings 120 on the optical fiber body 110 in each group of optical fiber measurement components 100 can simultaneously measure the temperature values ​​of each temperature measurement point on the multiple pipes 310 .

[0045] Therefore, through multiple groups of optical fiber measurement components 100, networked temperature measurement points can be formed on the subject to be measured 300, so as to achieve full coverage of the subject to be measured 300, so as to comprehensively monitor the temperature of the subject to be measured 300, thereby avoiding or eliminating failures such as explosion of the pipeline 310 due to inadequate monitoring, thereby greatly improving the safety performance of the subject to be measured 300.

[0046] It should be noted here that, in the above second embodiment, multiple groups of optical fiber measurement components 100 can share a laser modulator 200, that is, each optical fiber body 110 in the multiple groups of optical fiber measurement components 100 is connected to the same laser modulator 200, so that the laser modulator 200 can emit laser to each optical fiber body 110, and the laser returned by each optical fiber body 110 is sent to the same laser modulator 200 for demodulation, and then the demodulated data is sent to the control unit connected to the laser modulator 200 for processing. Of course, it is also possible to use a laser modulator 200 for each group of optical fiber measurement components 100, and then connect multiple laser modulators 200 to the control unit respectively, so that the demodulated data of each laser modulator 200 is sent to the control unit, and finally the control unit processes the data.

[0047] refer to Figure 4 In the third embodiment, the temperature measurement device includes a group of optical fiber measurement components 100, wherein the optical fiber body 110 in the group of optical fiber measurement components 100 extends along the length direction of the pipeline 310, that is, the extension direction of the optical fiber body 110 is the same as or opposite to the flow direction of the working medium in the pipeline 310, and the multiple optical fiber gratings 120 on the optical fiber body 110 are connected to the side wall of the same pipeline 310 at intervals. Based on the above configuration, the temperature values ​​of each measurement point on a pipeline 310 can be measured by the multiple optical fiber gratings 120 in the group of optical fiber measurement components 100. This embodiment can be applied to some special occasions. For example, the temperature of some pipelines 310 is relatively high and needs to be monitored separately. At this time, multiple optical fiber gratings 120 can be set on these pipelines 310 separately to detect these pipelines 310 to ensure that the temperature of these pipelines 310 is not too high. On this basis, the temperature of other pipelines 310 will not be too high either.

[0048] It should be noted here that the third embodiment described above can arrange the fiber Bragg grating 120 on the pipeline 310 in a targeted manner, which can reduce the number of fiber Bragg gratings 120 used to a certain extent, thereby reducing the investment cost.

[0049] refer to Figure 5In the fourth embodiment, the temperature measurement device includes a plurality of groups of optical fiber measurement components 100, the main body 300 to be measured includes a plurality of pipes 310 arranged in parallel, and each group of optical fiber measurement components 100 corresponds to each pipe 310 one by one; wherein the optical fiber body 110 in each group of optical fiber measurement components 100 extends along the length direction of the corresponding pipe 310, and the plurality of optical fiber gratings 120 on the optical fiber body 110 are connected to the side wall of the pipe 310 at intervals. Optionally, the optical fiber body 110 in each group of optical fiber measurement components 100 is engraved with a plurality of optical fiber gratings 120, so that the temperature of a plurality of temperature measurement points on the corresponding pipe 310 can be measured by the plurality of optical fiber gratings 120 in each group of optical fiber measurement components 100.

[0050] Based on the above configuration, each group of optical fiber measurement components 100 measures the temperature of each pipeline 310 individually, thereby obtaining the temperature values ​​at different positions on each pipeline 310 .

[0051] Therefore, through multiple groups of optical fiber measurement components 100, networked temperature measurement points can be formed on the subject to be measured 300, and the temperature field distribution on the subject to be measured 300 can be determined by mathematical methods, so as to achieve full coverage of the subject to be measured 300, so as to conduct comprehensive monitoring of the subject to be measured 300, and thus avoid or eliminate failures such as explosion of the pipeline 310 due to inadequate monitoring, thereby greatly improving the safety performance of the subject to be measured 300.

[0052] It should be noted here that, in the fourth embodiment described above, multiple groups of optical fiber measurement components 100 may share a laser modulator 200, or each group of optical fiber measurement components 100 may independently use a laser modulator 200, which is not limited in the embodiment of the present application.

[0053] Of course, in addition to the above-mentioned embodiments, other methods may also be used as long as the temperature of the subject 300 to be measured can be measured. The arrangement of the fiber grating 120 on the subject 300 to be measured is not limited in the embodiment of the present application.

[0054] In some embodiments, the distance between two adjacent fiber Bragg gratings 120 is greater than or equal to 7 mm, specifically including 7 mm, 8 mm, 10 mm, 15 mm, 20 mm, etc. Optionally, the distance between two adjacent fiber Bragg gratings 120 on the fiber body 110 in the same group of fiber measurement components 100 may be greater than or equal to 7 mm, or the distance between the fiber Bragg gratings 120 in two adjacent groups of fiber measurement components 100 may be greater than or equal to 7 mm. Based on the above settings, on the one hand, the normal distribution of the fiber Bragg gratings 120 on the subject 300 to be measured can be ensured, and on the other hand, intensive measurement of the subject 300 to be measured can be achieved to improve the measurement accuracy.

[0055] In order to achieve the connection between the fiber Bragg grating 120 and the pipe 310, in the embodiment of the present application, a heat collection block 400 can be provided on the outer wall of the pipe 310, and the fiber Bragg grating 120 is fixed to the heat collection block 400. By providing the heat collection block 400, on the one hand, the fiber Bragg grating 120 can be fixed to the side wall of the pipe 310, and on the other hand, it can also play a certain heat collection role, so that the fiber Bragg grating 120 can more accurately measure the temperature value of the side wall of the pipe 310. Optionally, the heat collection block 400 can be a copper block, an iron block, etc.

[0056] In other embodiments, the fiber Bragg grating 120 may be fixed to the side wall of the pipe 310 by welding, bonding, binding or clamping to ensure good contact between the fiber Bragg grating 120 and the side wall of the pipe 310 .

[0057] To further improve the measurement accuracy, the contact area between the fiber grating 120 and the side wall of the pipe 310 may be kept warm to reduce the measurement error.

[0058] refer to Figure 1 In some embodiments, the optical fiber measurement component 100 further includes a packaging jacket 130, which is coated on the outside of the optical fiber body 110. Thus, the packaging jacket 130 can protect the optical fiber body 110 and the optical fiber grating 120, and at the same time, can also support the optical fiber body 110.

[0059] Optionally, the packaging jacket 130 is made of metal, that is, the optical fiber body 110 and the optical fiber grating 120 are packaged in a metalized manner for protection and support. The packaging jacket 130 can be made of a stainless steel tube.

[0060] Optionally, the overall diameter of the optical fiber measurement component 100 using metallization packaging is relatively thin, generally up to 0.5 mm to 6 mm, including: 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, etc. The specific diameter of the optical fiber measurement component 100 is not limited in the embodiment of the present application. Based on the above settings, the optical fiber measurement component 100 has good flexibility and good bending performance.

[0061] In order to monitor the temperature of the subject 300 to be measured, the temperature measurement device in the embodiment of the present application further includes a control unit, wherein the laser modulator 200 is connected to the control unit for information exchange. Optionally, the laser modulator 200 can have multiple data exchange or communication modes with the data monitoring and control center, such as optical fiber, coaxial cable or RJ45 network cable interface.

[0062] refer to Figures 1 to 6 The embodiment of the present application also discloses a temperature measurement method, and the disclosed temperature measurement method includes:

[0063] S101: emitting laser light to the optical fiber body 110 through the laser modulator 200, and transmitting the laser light along the optical fiber body 110 to the optical fiber grating 120;

[0064] S102: emitting laser light through the fiber grating 120 and returning the laser light along the fiber body 110;

[0065] S103 : receiving the returned laser through the laser modulator 200 and demodulating it to obtain the temperature value of the temperature measurement point corresponding to the fiber Bragg grating 120 .

[0066] In the embodiment of the present application, the fiber Bragg grating 120 is arranged on the subject 300 to be measured, and the fiber Bragg grating 120 is connected to the fiber body 110, so that the laser emitted by the laser modulator 200 can be transmitted to the fiber Bragg grating 120 through the fiber body 110. When the laser reaches the fiber Bragg grating 120, it is reflected by the fiber Bragg grating 120, and then returns along the fiber body 110, and is received and demodulated by the laser modulator 200. In the above process, when the temperature of the temperature measurement point corresponding to the fiber Bragg grating 120 changes, due to the effect of thermal expansion and contraction, the period of the grating fringes of the fiber Bragg grating 120 changes, thereby changing the wavelength of the laser reflected by the fiber Bragg grating 120, and after returning, it is demodulated by the laser modulator 200 to display the temperature value of the temperature measurement point, thereby realizing the temperature measurement.

[0067] In summary, the embodiments of the present application can solve the problems of the conventional temperature measurement system, such as overall complexity, long guide wires, high cost, inability to achieve full coverage, inability to fully monitor temperature, and inability to avoid explosion due to over-temperature; the temperature measurement solution provided by the embodiments of the present application is easy to implement, has low cost, and mature technology, and can achieve comprehensive monitoring of the subject 300 to be measured, and is not limited to high-temperature heating surfaces, but can also be applied to low-temperature heating surfaces, etc.

[0068] In the embodiment of the present application, when the temperature measuring device is applied to the boiler to measure the temperature of the boiler tube, the temperature of all the tubes can be detected, thereby providing reliable technical analysis data for boiler combustion, furnace temperature field analysis, furnace tube hydrodynamic characteristics analysis, high-temperature furnace tube oxide scale shedding and generation, and various heat deviations and uneven causes. Through full coverage of the furnace tube wall temperature analysis, overheated furnace tubes can be discovered in time, so that corresponding measures can be taken to prevent the furnace tubes from bursting due to overheating, thereby fundamentally avoiding the unplanned shutdown of the unit caused by the overheating and bursting of the furnace tubes, and thus providing reliable protection for the safe, economical and stable operation of the enterprise.

[0069] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A temperature measuring device, used for measuring the temperature of a subject (300) to be measured, wherein the subject (300) to be measured is a boiler, characterized in that: include: An optical fiber measurement component (100), the optical fiber measurement component (100) comprising an optical fiber body (110) and an optical fiber grating (120), the optical fiber body (110) being provided with a plurality of the optical fiber gratings (120), the subject to be measured (300) comprising a pipe (310), at least one optical fiber grating (120) being arranged on the outer surface of a side wall of the pipe (310); A laser modulator (200), the laser modulator (200) being connected to the optical fiber body (110) and being used for emitting laser light or receiving laser light; The laser light emitted by the laser modulator (200) is transmitted along the optical fiber body (110) to the optical fiber grating (120), is reflected by the optical fiber grating (120) and returns along the optical fiber body (110), and the returned laser light is received and demodulated by the laser modulator (200); A heat collection block (400) is provided on the outer surface of the side wall of the pipe (310), and the optical fiber grating (120) is fixed to the heat collection block (400); The temperature measurement device comprises a plurality of groups of optical fiber measurement components (100), the subject to be measured (300) comprises a plurality of pipes (310) arranged in parallel, and the plurality of groups of optical fiber measurement components (100) are arranged at intervals along the extension direction of any one of the pipes (310); The optical fiber body (110) in each group of the optical fiber measurement components (100) extends along the arrangement direction of the plurality of pipes (310), and the plurality of optical fiber gratings (120) on the optical fiber body (110) are connected to the plurality of pipes (310) in a one-to-one correspondence.

2. The temperature measuring device according to claim 1, characterized in that: The distance between two adjacent optical fiber gratings (120) is greater than or equal to 7 mm.

3. The temperature measuring device according to claim 1, characterized in that: The optical fiber measurement assembly (100) further comprises a packaging jacket (130); The packaging jacket (130) is coated on the outside of the optical fiber body (110), and / or the packaging jacket (130) is made of metal.

4. The temperature measuring device according to claim 1, characterized in that: The outer diameter of the optical fiber measurement component (100) ranges from 0.5 mm to 6 mm.

5. The temperature measuring device according to claim 1, characterized in that: The temperature measurement device also includes a control unit, and the laser modulator (200) is connected to the control unit to perform information exchange.

6. A temperature measurement method, applied to the temperature measurement device according to any one of claims 1 to 5, characterized in that: The temperature measurement method comprises: emitting laser light to the optical fiber body (110) through the laser modulator (200), and transmitting the laser light along the optical fiber body (110) to the optical fiber grating (120); Reflecting the laser light through the fiber grating (120) and returning the laser light along the fiber body (110); The returned laser light is received and demodulated by the laser modulator (200) to obtain the temperature value of the temperature measurement point corresponding to the optical fiber grating (120).

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