Long-line temperature measuring device

Abstract

The utility model discloses a long-line temperature measuring device, and relates to the technical field of optical fiber temperature measuring equipment, the long-line temperature measuring device comprises a temperature measuring junction box and at least two temperature measuring modules, the temperature measuring junction box is provided with a first end extending along a first direction and a second end extending along a second direction, the first direction and the second direction are arranged in an intersecting manner, and the first end and the second end are arranged in a staggered manner. At least one pair of cables is connected in the temperature measurement junction box, the cables respectively extend into the temperature measurement junction box from a first end and a second end in the pair of cables, one temperature measurement module corresponds to one cable, and the temperature measurement module comprises a temperature measurement optical fiber, a laser emitting assembly connected with one end of the temperature measurement optical fiber and a laser sensing assembly connected with the other end of the temperature measurement optical fiber. And the temperature measuring optical fiber is arranged in the shell wall of the protective shell. According to the technical scheme provided by the utility model, in the cable laying process, when the cable needs to be bent, the influence of cable bending on the detection precision of the temperature measurement optical fiber can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber temperature measurement equipment, in particular to a long-line temperature measurement device. Background Art

[0002] During the cable laying process, it is inevitable that the cable will encounter scenes where it needs to turn corners. However, the bending of the cable will cause the temperature measuring optical fiber attached to the cable to bend together. The bending of the temperature measuring optical fiber usually causes the loss of laser light inside the optical fiber, which will cause large temperature measurement errors. Utility Model Content

[0003] The main purpose of the utility model is to provide a long-line temperature measuring device, which aims to reduce the influence of cable bending on the detection accuracy of the temperature measuring optical fiber when the cable needs to be bent during the cable laying process.

[0004] To achieve the above-mentioned purpose, the long-line temperature measuring device proposed in the present invention is used for a cable, wherein the cable includes a protective shell and a battery core, and includes:

[0005] A temperature measuring junction box having a first end and a second end, the first end extending along a first direction, the second end extending along a second direction, and the first direction and the second direction being arranged to intersect, at least one pair of cables being connected within the temperature measuring junction box, one cable in a pair of cables being able to extend into the temperature measuring junction box from the first end, and the other cable being able to extend into the temperature measuring junction box from the second end, so that the battery cells of the two cables can be connected within the temperature measuring junction box; and

[0006] At least two temperature measuring modules, one temperature measuring module corresponds to one cable, the temperature measuring module includes a temperature measuring optical fiber, a laser emitting component connected to one end of the temperature measuring optical fiber, and a laser sensing component connected to the other end of the temperature measuring optical fiber, the temperature measuring optical fiber is installed in the shell wall of the protective shell, the laser sensing component of one temperature measuring module is arranged in the temperature measuring junction box, and the laser emitting component of the other temperature measuring module is arranged in the temperature measuring junction box.

[0007] In one embodiment, in the temperature measuring junction box, the battery core and the temperature measuring optical fiber extend out of the protective shell, and the temperature measuring junction box is provided with a temperature measuring chamber and battery core chambers arranged at intervals along the circumference of the temperature measuring chamber, the temperature measuring chamber and the battery core chamber extend in the extension direction of the temperature measuring junction box, the two battery cores are connected in the battery core chamber, and the two temperature measuring optical fibers both extend into the temperature measuring chamber.

[0008] In one embodiment, when at least two pairs of cables are inserted into the temperature measurement junction box, at least two temperature measurement chambers and at least two battery cell chambers are provided accordingly.

[0009] In one embodiment, the temperature measuring junction box includes a first section extending along a first direction and a second section extending along a second direction. The laser emitting component in the temperature measuring chamber is arranged in one of the first section and the second section, and the laser sensing component in the temperature measuring chamber is arranged in the other.

[0010] In one embodiment, the laser emitting component includes a pulse laser and a combiner, the laser sensing component includes a wave splitter and an electrical control component, the output end of the pulse laser is connected to the receiving end of the wave combiner, the output end of the wave combiner is connected to one end of the temperature measuring optical fiber, the other end of the temperature measuring optical fiber is connected to the receiving end of the wave splitter, and the output end of the wave splitter is connected to the receiving end of the electrical control component.

[0011] In one embodiment, the electrical control unit includes a digital-to-analog converter, a control board, and a signal transmitter connected in sequence, the output end of the signal transmitter is connected to the receiving end of the pulse laser, and the output end of the splitter is connected to the receiving end of the control board via a digital-to-analog converter.

[0012] In one embodiment, when at least two pairs of cables are inserted into the temperature measurement junction box, the splitter, the laser sensing component and the laser emission component in the temperature measurement junction box each have at least two, and the control boards of all the laser sensing components are configured as the same control board.

[0013] In one embodiment, the temperature measurement module further includes a conversion component, and the laser sensing component and the laser emitting component disposed in the temperature measurement junction box are respectively connected to the temperature measurement optical fiber through the conversion component.

[0014] In one embodiment, the conversion component includes a conversion optical fiber and a conversion joint. In the laser sensing component, one end of the conversion optical fiber is aligned and connected with the receiving end of the splitter, and in the laser emission component, one end of the conversion optical fiber is aligned and connected with the output end of the combiner; the other end of the conversion optical fiber is connected to the temperature measuring optical fiber through the conversion joint.

[0015] In one embodiment, the conversion joint includes a first connecting sleeve, a second connecting sleeve, an adapter sleeve, a spring and a core. The first connecting sleeve is threadedly connected to the second connecting sleeve and can enclose an installation cavity. The core and the spring are both arranged in the installation cavity. One end of the adapter sleeve is arranged on the outside of the second connecting sleeve, and the other end is provided with an abutment boss and is arranged in the installation cavity. The spring sleeve is arranged on the adapter sleeve and is located between the end wall of the second connecting sleeve and the abutment boss. The temperature measuring optical fiber is inserted into the adapter sleeve and extends into the core. The conversion optical fiber extends from the outside of the first connecting sleeve to the installation cavity and into the core. The end of the conversion optical fiber and the end of the temperature measuring optical fiber are both abutted in the core.

[0016] In one embodiment, a protective sleeve is provided in the temperature measurement junction box, the conversion optical fiber is aligned with the output end of the combiner through the protective sleeve, and the protective sleeve is relatively fixed to the combiner, and the end of the first connecting sleeve away from the second connecting sleeve is connected to the protective sleeve.

[0017] In the technical solution of the present invention, when the cable needs to be bent from a first direction to a second direction during laying, a temperature measurement junction box is placed at the bend, and two cables are respectively extended into the temperature measurement junction box from the first and second directions. The battery cells of the cables are connected inside the temperature measurement junction box to maintain power transmission. The temperature measurement optical fiber in one cable is connected to a laser output component in a temperature measurement module disposed inside the temperature measurement junction box, so that the laser light emitted by the laser output component is transmitted through the temperature measurement optical fiber and received by a laser sensing component disposed outside the temperature measurement junction box of the temperature measurement module; the temperature measurement optical fiber in another cable is connected to a laser sensing component in another temperature measurement module disposed inside the temperature measurement junction box to receive the laser light emitted by the laser output component in the temperature measurement module disposed outside the temperature measurement junction box, thereby achieving temperature measurement of the pair of cables extending into the junction box. That is, the cable laying is turned by the temperature measuring junction box. At this time, the cable does not need to be bent, so the temperature measuring optical fiber arranged in the cable will not bend, and the temperature measuring optical fiber is arranged in the laser emitting component and the laser incident component in the temperature measuring junction box to measure the cable temperature, reducing the influence of the bending of the temperature measuring optical fiber on the temperature measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1This is a structural diagram of an embodiment of a long-line temperature measurement device provided by the present utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the conversion component.

[0021] Description of Figure Numbers:

[0022] 100, temperature measurement junction box; 11, first end; 12, first section; 13, second end; 14, second section; 15, temperature measurement chamber; 16, battery cell chamber;

[0023] 200, temperature measurement module; 21, laser emission component; 211, pulsed laser; 212, combiner; 22, laser sensing component; 221, splitter; 222, electrical control unit; 223, digital-to-analog converter; 224, control board; 225, signal transmitter; 23, conversion component; 231, conversion optical fiber; 232, conversion connector; 233, first connecting sleeve; 234, second connecting sleeve; 235, mounting cavity; 236, adapter sleeve; 237, spring; 238, ferrule;

[0024] 300. Cable; 31. Temperature measuring optical fiber; 32. Battery cell.

[0025] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

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

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] The utility model provides a long-line temperature measuring device.

[0030] See also Figures 1 to 2 In one embodiment of the present invention, the long-line temperature measuring device is used for a cable 300, which includes a protective shell and a battery core 32, including:

[0031] A temperature measuring junction box 100 having a first end 11 and a second end 13, wherein the first end 11 extends along a first direction and the second end 13 extends along a second direction, and the first direction and the second direction are arranged to intersect, and at least one pair of cables 300 is connected in the temperature measuring junction box 100. In the pair of cables 300, one cable 300 can extend into the temperature measuring junction box 100 from the first end 11, and the other cable 300 can extend into the temperature measuring junction box 100 from the second end 13, so that the battery cells 32 of the two cables 300 can be connected in the temperature measuring junction box 100; and

[0032] At least two temperature measuring modules 200, one temperature measuring module 200 corresponds to one cable 300, the temperature measuring module 200 includes a temperature measuring optical fiber 31, a laser emitting component 21 connected to one end of the temperature measuring optical fiber 31, and a laser sensing component 22 connected to the other end of the temperature measuring optical fiber 31, the temperature measuring optical fiber 31 is installed in the shell wall of the protective shell, the laser sensing component 22 of one temperature measuring module 200 is arranged in the temperature measuring junction box 100, and the laser emitting component 21 of the other temperature measuring module 200 is arranged in the temperature measuring junction box 100.

[0033] In the technical solution of the present invention, when the cable 300 is laid to the point where it needs to turn from the first direction to the second direction, the temperature measuring junction box 100 is placed at the turning point, and the two cables 300 are respectively extended into the temperature measuring junction box 100 from the first direction and the second direction, and the battery cores 32 of the cables 300 are connected inside the temperature measuring junction box 100 to maintain power transmission. The temperature measuring optical fiber 31 in one cable 300 is connected to the laser emitting component 21 in a temperature measuring module 200 and provided in the temperature measuring junction box 100, so that the laser emitted by the laser emitting component 21 is transmitted in the temperature measuring optical fiber 31 and is received by the laser sensing component 22 of the temperature measuring module 200 and provided outside the temperature measuring junction box 100; the temperature measuring optical fiber 31 in another cable 300 is connected to the laser sensing component 22 in another temperature measuring module 200 and provided in the temperature measuring junction box 100, so as to receive the laser emitted by the laser emitting component 21 in the temperature measuring module 200 and provided outside the temperature measuring junction box 100, so as to realize temperature measurement of a pair of cables 300 extending into the junction box. That is, the laying and steering of the cable 300 is achieved through the temperature measuring junction box 100. At this time, the cable 300 does not need to be bent, so the temperature measuring optical fiber 31 arranged in the cable 300 will not bend, and the temperature measuring optical fiber 31 is arranged in the laser emitting component 21 and the laser incident component in the temperature measuring junction box 100 to measure the temperature of the cable 300, reducing the influence of the bending of the temperature measuring optical fiber 31 on the temperature measurement accuracy.

[0034] In one embodiment, within the temperature measurement junction box 100, the battery cells 32 and the temperature measurement optical fibers 31 extend out of a protective casing. The temperature measurement junction box 100 is provided with a temperature measurement chamber 15 and battery cell chambers 16 spaced apart circumferentially around the temperature measurement chamber 15. The temperature measurement chamber 15 and the battery cell chambers 16 extend in the direction of extension of the temperature measurement junction box 100. The two battery cells 32 are connected within the battery cell chamber 16, and the two temperature measurement optical fibers 31 extend into the temperature measurement chamber 15. Specifically, within the temperature measurement junction box 100, a portion of the protective casing is peeled off from the end of the cable 300 to expose the temperature measurement optical fibers 31 and the battery cells 32. During the production process of the cable 300, insulating oil is present between the battery core 32 and the protective shell, which helps prevent current leakage and short circuits, thereby improving the safety of the cable 300. At the same time, the insulating oil can effectively prevent the intrusion of moisture, protect the insulating material inside the cable 300, and prevent the degradation of insulation performance due to moisture. After the protective shell of the cable 300 is stripped from the battery core 32, in order to prevent the insulating oil from flowing out of the cable 300 along the battery core 32, the battery core 32 and the temperature measuring optical fiber 31 are separated in the temperature measuring junction box 100. This helps to seal the two connected battery cores 32 and part of the protective shell without affecting the laser transmission in the temperature measuring optical fiber 31, so as to prevent the leakage of insulating oil and help prevent water vapor from contacting the battery core 32. In other embodiments, the temperature measuring chamber 15 and the battery cell chamber 16 can also be configured as the same chamber.

[0035] In one embodiment, when at least two pairs of cables 300 are inserted into the temperature measuring junction box 100, at least two temperature measuring chambers 15 and battery cell chambers 16 are provided accordingly. That is, when a pair of cables 300 are connected, one temperature measuring chamber 15 and one battery cell chamber 16 are used. Furthermore, the temperature measuring chamber 15 and the battery cell chamber 16 are arranged in the temperature measuring junction box 100 along the height direction of the temperature measuring junction box 100, and the multiple temperature measuring chambers 15 are arranged along the width direction of the temperature measuring junction box 100, and the multiple battery cell chambers 16 are arranged along the width direction of the temperature measuring junction box 100. In other embodiments, it is also possible that in the width direction of the temperature measuring junction box 100, the multiple temperature measuring chambers 15 and the multiple battery cell chambers 16 are arranged crosswise with each other. Specifically, a battery cell chamber 16 is inserted between two adjacent temperature measuring chambers 15.

[0036] In one embodiment, the temperature measurement junction box 100 includes a first section 12 extending along a first direction and a second section 14 extending along a second direction. The laser emitting component 21 in the temperature measurement chamber 15 is disposed in one of the first section 12 and the second section 14, and the laser sensing component 22 in the temperature measurement chamber 15 is disposed in the other section so as to correspond to the two temperature measurement optical fibers 31 respectively. Specifically, when the laser emitting component 21 is located in the first section 12 and the laser sensing component 22 is located in the second section 14, the temperature measuring optical fiber 31 in the cable 300 extending from the first end 11 corresponds to the laser emitting component 21, and the laser can be irradiated into the temperature measuring optical fiber 31 located in the first section 12. The temperature measuring optical fiber 31 in the cable 300 extending from the second end 13 corresponds to the laser sensing component 22 and can receive the laser transmitted by the temperature measuring optical fiber 31 located in the second section 14. That is, the laser emitting component 21 extends along the first direction, and the emitting end of the laser is the end of the laser emitting component 21 close to the temperature measuring optical fiber 31 in the first direction. The laser sensing component 22 extends along the second direction, and the receiving end of the laser is the end of the laser sensing component 22 close to the temperature measuring optical fiber 31 in the second direction. In other embodiments, it may also be that when the laser emitting component 21 is located in the second section 14 and the laser sensing component 22 is located in the first section 12, the temperature measuring optical fiber 31 in the cable 300 extending from the first end 11 corresponds to the laser emitting component 21, and the laser can be irradiated into the temperature measuring optical fiber 31 located in the first section 12, and the temperature measuring optical fiber 31 in the cable 300 extending from the second end 13 corresponds to the laser sensing component 22, and can receive the laser transmitted by the temperature measuring optical fiber 31 located in the second section 14, that is, the laser emitting component 21 extends along the second direction and extends into the first section 12, the emitting end of the laser is located in the structure where the laser emitting component 21 extends into the first section 12, the laser sensing component 22 extends along the first direction and extends into the second section 14, and the receiving end of the laser is located in the structure where the laser emitting component 21 extends into the second section 14.

[0037] In one embodiment, the laser output assembly 21 includes a pulsed laser 211 and a combiner 212, and the laser sensing assembly 22 includes a demultiplexer 221 and an electrical control unit 222. The output end of the pulsed laser 211 is connected to the receiving end of the combiner 212, the output end of the combiner 212 is connected to one end of the temperature measurement optical fiber 31, the other end of the temperature measurement optical fiber 31 is connected to the receiving end of the demultiplexer 221, and the output end of the demultiplexer 221 is connected to the receiving end of the electrical control unit 222. The main function of the combiner 212 is to combine multiple optical signals of different wavelengths into a single optical fiber for transmission. The pulsed laser 211 can emit multiple laser beams of different wavelengths, and the combiner 212 combines these laser beams for efficient transmission through the same temperature measurement optical fiber 31. The main function of the demultiplexer 221 is to separate the composite laser beam transmitted through the temperature measurement optical fiber 31 into multiple laser beams of different wavelengths. At the receiving end of the demultiplexer 221, the demultiplexer 221 separates the combined optical signals so that the electrical control board can receive, process, and decode them separately.

[0038] In one embodiment, the electronic control unit 222 includes a sequentially connected digital-to-analog converter 223, a control board 224, and a signal transmitter 225. The output of the signal transmitter 225 is connected to the receiving end of the pulsed laser 211. The output of the wave splitter 221 is connected to the receiving end of the control board 224 via the digital-to-analog converter 223. Under normal circumstances, different temperatures within the temperature-measuring optical fiber 31 cause different light scattering rates at that location, which in turn affects the intensity of the scattered light received by the light emitting end, thereby calculating the temperature value at that location. Because the transmission speed of laser light within the temperature-measuring optical fiber 31 is fixed, the signal transmitter 225 controls the pulsed laser 211 to transmit different pulses. Therefore, based on the sequence and time interval of the signals received by the control board 224 from the digital-to-analog converter 223, the temperature and stress distribution along the temperature-measuring optical fiber 31 can be calculated.

[0039] In one embodiment, when at least two pairs of cables 300 are inserted into the temperature measurement junction box 100, the temperature measurement junction box 100 includes at least two demultiplexers 221, laser sensing components 22, and laser emission components 21, respectively. All laser sensing components 22 are configured with the same control board 224. In other embodiments, each laser sensing component 22 may have a separate control board 224.

[0040] In one embodiment, the temperature measurement module 200 further includes a conversion assembly 23. The laser sensing assembly 22 and the laser emitting assembly, located within the temperature measurement junction box 100, are connected to the temperature measurement optical fiber 31 via the conversion assembly 23, thereby achieving a stable connection between the temperature measurement optical fiber 31 and the laser sensing assembly 22 or the laser emitting assembly 21. In other embodiments, the temperature measurement optical fiber 31 can be fixed within the temperature measurement junction box 100 by spot soldering and aligned with the receiving end of the laser sensing assembly 22 or the output end of the laser emitting assembly 21.

[0041] In one embodiment, the conversion assembly 23 includes a conversion fiber 231 and a conversion connector 232. In the laser sensing assembly 22, one end of the conversion fiber 231 is aligned and connected to the receiving end of the wavelength splitter 221. In the laser output assembly 21, one end of the conversion fiber 231 is aligned and connected to the output end of the wavelength combiner 212. The other end of the conversion fiber 231 is connected to the temperature measurement fiber 31 via the conversion connector 232. Specifically, the conversion fiber 231 is connected to the wavelength splitter 221 or the wavelength combiner 212, while the temperature measurement fiber 31 and the conversion fiber 231 are connected via the conversion connector 232. This effectively reduces the time required to connect the cable 300 to the temperature measurement junction box 100. In other embodiments, the conversion fiber 231 and the temperature measurement fiber 31 can be fused together.

[0042] In one embodiment, the conversion joint 232 includes a first connecting sleeve 233, a second connecting sleeve 234, an adapter sleeve 236, a spring 237 and a core 238. The first connecting sleeve 233 is threadedly connected to the second connecting sleeve 234 and can enclose an installation cavity 235. The core 238 and the spring 237 are both arranged in the installation cavity 235. One end of the adapter sleeve 236 is arranged on the outside of the second connecting sleeve 234, and the other end is provided with an abutment boss and is arranged in the installation cavity 235. The spring 237 is sleeved on the adapter sleeve 236 and is located between the end wall of the second connecting sleeve 234 and the abutment boss. The temperature measuring optical fiber 31 is inserted into the adapter sleeve 236 and extends into the core 238. The conversion optical fiber 231 extends from the outside of the first connecting sleeve 233 to the installation cavity 235 and into the core 238. The end of the conversion optical fiber 231 and the end of the temperature measuring optical fiber 31 are both abutted in the core 238. A spring 237 is provided within the adapter 232, facilitating the docking of the temperature-sensing optical fiber 31 with the adapter optical fiber through the elastic force of the spring 237. This effectively prevents damage to the temperature-sensing optical fiber 31 or the adapter optical fiber 231 due to excessive thread torque during the rotational connection between the first and second connector sleeves 233, 234. Furthermore, since fiber breakage due to excessive thread tightening is effectively avoided during installation, installation can be performed without deliberately controlling the tightening force, making installation faster and more efficient. In other embodiments, the first and second connector sleeves 233, 234 can also be connected via a snap-fit ​​connection.

[0043] In one embodiment, a protective sleeve is provided within the temperature measurement junction box 100. The conversion optical fiber 231 is aligned with the output end of the combiner 212 via the protective sleeve. The protective sleeve and combiner 212 are relatively fixed, and the end of the first connecting sleeve 233 distal from the second connecting sleeve 234 is connected to the protective sleeve. Furthermore, the protective sleeve is made of metal or hard plastic. In other embodiments, the protective sleeve may not be provided, and the conversion optical fiber 231 and the output end of the combiner 212 may be aligned and fixed using soldering.

[0044] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A long-line temperature measuring device for a cable, wherein the cable comprises a protective shell and a battery core, characterized in that: include: A temperature measuring junction box having a first end and a second end, wherein the first end extends along a first direction and the second end extends along a second direction, and the first direction and the second direction are arranged to intersect each other, and at least one pair of cables is connected in the temperature measuring junction box. In a pair of cables, one cable can extend into the temperature measuring junction box from the first end, and the other cable can extend into the temperature measuring junction box from the second end, so that the battery cells of the two cables can be connected in the temperature measuring junction box; and At least two temperature measuring modules, one temperature measuring module corresponds to one cable, the temperature measuring module includes a temperature measuring optical fiber, a laser emitting component connected to one end of the temperature measuring optical fiber, and a laser sensing component connected to the other end of the temperature measuring optical fiber, the temperature measuring optical fiber is installed in the shell wall of the protective shell, the laser sensing component of one temperature measuring module is arranged in the temperature measuring junction box, and the laser emitting component of the other temperature measuring module is arranged in the temperature measuring junction box.

2. The long-line temperature measurement device according to claim 1, characterized in that: In the temperature measuring junction box, the battery core and the temperature measuring optical fiber extend out of the protective shell. The temperature measuring junction box is provided with a temperature measuring chamber and battery core chambers arranged at intervals along the circumference of the temperature measuring chamber. The temperature measuring chamber and the battery core chamber extend in the extension direction of the temperature measuring junction box. The two battery cores are connected in the battery core chamber, and the two temperature measuring optical fibers both extend into the temperature measuring chamber.

3. The long-line temperature measurement device according to claim 2, characterized in that: When at least two pairs of cables are inserted into the temperature measurement junction box, the temperature measurement chamber and the battery cell chamber are each provided with at least two corresponding ones; And / or, the temperature measuring junction box includes a first section extending along a first direction and a second section extending along a second direction, the laser emitting component in the temperature measuring chamber is arranged in one of the first section and the second section, and the laser sensing component in the temperature measuring chamber is arranged in the other.

4. The long-line temperature measurement device according to claim 1, characterized in that: The laser emitting component includes a pulse laser and a combiner, and the laser sensing component includes a wave splitter and an electrical control component. The output end of the pulse laser is connected to the receiving end of the wave combiner, the output end of the wave combiner is connected to one end of the temperature measuring optical fiber, the other end of the temperature measuring optical fiber is connected to the receiving end of the wave splitter, and the output end of the wave splitter is connected to the receiving end of the electrical control component.

5. The long-line temperature measurement device according to claim 4, characterized in that: The electrical control unit includes a digital-to-analog converter, a control board and a signal transmitter connected in sequence. The output end of the signal transmitter is connected to the receiving end of the pulse laser. The output end of the splitter is connected to the receiving end of the control board through a digital-to-analog converter.

6. The long-line temperature measurement device according to claim 5, characterized in that: When at least two pairs of cables are inserted into the temperature measurement junction box, there are at least two wave splitters, laser sensing components and laser emission components in the temperature measurement junction box, and the control boards of all the laser sensing components are configured as the same control board.

7. The long-line temperature measurement device according to claim 6, characterized in that: The temperature measurement module further includes a conversion component, and the laser sensing component and the laser emitting component arranged in the temperature measurement junction box are respectively connected to the temperature measurement optical fiber through the conversion component.

8. The long-line temperature measurement device according to claim 7, characterized in that: The conversion component includes a conversion optical fiber and a conversion joint. In the laser sensing component, one end of the conversion optical fiber is aligned and connected with the receiving end of the splitter. In the laser emission component, one end of the conversion optical fiber is aligned and connected with the output end of the combiner; the other end of the conversion optical fiber is connected to the temperature measuring optical fiber through the conversion joint.

9. The long-line temperature measurement device according to claim 8, characterized in that: The conversion joint includes a first connecting sleeve, a second connecting sleeve, an adapter sleeve, a spring and a core. The first connecting sleeve is threadedly connected to the second connecting sleeve and can enclose an installation cavity. The core and the spring are both arranged in the installation cavity. One end of the adapter sleeve is arranged on the outside of the second connecting sleeve, and the other end is provided with an abutment boss and is arranged in the installation cavity. The spring sleeve is arranged on the adapter sleeve and is located between the end wall of the second connecting sleeve and the abutment boss. The temperature measuring optical fiber is inserted into the adapter sleeve and extends into the core. The conversion optical fiber extends from the outside of the first connecting sleeve to the installation cavity and into the core. The end of the conversion optical fiber and the end of the temperature measuring optical fiber are both abutted in the core.

10. The long-line temperature measurement device according to claim 9, characterized in that: A protective sleeve is provided in the temperature measurement junction box, the conversion optical fiber is aligned with the output end of the combiner through the protective sleeve, and the protective sleeve is relatively fixed to the combiner, and the end of the first connecting sleeve away from the second connecting sleeve is connected to the protective sleeve.

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