Temperature sensor with robustness and thermal response

Abstract

The utility model discloses a kind of temperature sensors giving consideration to robustness and thermal response, to solve the existing optical fiber temperature sensor exists and the problem of poor protection effect of optical fiber probe, set covering structure influence temperature detection thermal response efficiency. The temperature sensor of the utility model includes sensor body, probe body and optical fiber joint;Sensor body includes shell, optical fiber and sensor probe, shell is sleeved on optical fiber, sensor probe is connected with one end of optical fiber, the other end of optical fiber is connected with optical fiber joint, sensor probe is located at the outside of one end of shell, probe body is sleeved on sensor probe and with one end of sensor probe detachably connected. By setting detachable probe body on sensor body, dynamic consideration and flexible switching of protective property and thermal response speed are realized, that is, the robustness and thermal response efficiency of temperature sensor are ensured.

Description

Technical Field

[0001] This utility model relates to the field of fiber optic temperature measurement technology, and in particular to a temperature sensor that combines robustness and thermal response. Background Technology

[0002] Fiber optic temperature sensing technology, based on the interaction mechanism between light signals and temperature fields, exhibits significant advantages in the field of power equipment temperature monitoring due to its inherent safety and resistance to electromagnetic interference. Particularly in critical power facilities such as high-voltage switchgear and transformer windings, fiber optic temperature measurement systems have gradually replaced traditional electrical sensors, enabling continuous online monitoring of the equipment's thermal state. Fiber optic probes are as small as 1mm, and their thermal response speed is excellent, reaching millisecond levels, even without external encapsulation. However, because the probes are not externally protected, they are easily damaged during on-site construction or portable use. Especially at installation sites of temperature-measuring components and equipment, the complexity of the environment makes fiber optic sensors susceptible to being stepped on by passing personnel due to their small size.

[0003] Existing protection technologies mostly employ metal bellows encapsulation or thermally conductive polymer coating structures. While these solutions can improve the level of mechanical protection, they significantly increase the equivalent thermal resistance of the heat conduction path. Even when using thermally conductive materials such as copper as protective components, they still weaken the system's response speed. Utility Model Content

[0004] (I) Purpose of the utility model

[0005] The purpose of this invention is to provide a temperature sensor that balances robustness and thermal response, aiming to solve the problems of poor protection of fiber optic probes and the impact of cladding structures on the thermal response efficiency of temperature detection in existing fiber optic temperature sensors.

[0006] (II) Technical Solution

[0007] To address the aforementioned issues, this utility model provides a temperature sensor that balances robustness and thermal response, comprising a sensor body, a detector, and an optical fiber connector. One end of the sensor body is detachably connected to the detector, and the other end of the sensor body is connected to the optical fiber connector.

[0008] The sensor body includes a housing, an optical fiber, and a sensor probe. The housing is sleeved on the optical fiber. The sensor probe is connected to one end of the optical fiber, and the other end of the optical fiber is connected to the optical fiber connector. The sensor probe is located outside one end of the housing. The probe body is sleeved on the sensor probe and is detachably connected to one end of the sensor probe.

[0009] Preferably, the probe body forms a receiving chamber and a connecting chamber, the receiving chamber is in communication with the connecting chamber, the sensor probe passes through the connecting chamber and is disposed in the receiving chamber, and one end of the outer shell is detachably connected to the inner wall of the connecting chamber.

[0010] Preferably, the inner wall of the connecting cavity is formed with a first thread, and the outer periphery of one end of the outer shell is formed with a second thread. The first thread and the second thread are adapted to each other, and the length of the first thread is less than or equal to the length of the second thread.

[0011] Preferably, the outer side wall of the detector is provided with an anti-slip component, the anti-slip component includes a first anti-slip part and at least one second anti-slip part, the first anti-slip part is located on the outer periphery of the receiving chamber, the first anti-slip part is detachably connected to the end of the detector, when the first anti-slip part is detached, the receiving chamber is connected to the outside, and the second anti-slip part is fixedly sleeved on the outer periphery of the detector.

[0012] Preferably, the inner wall of the first anti-slip part is formed with a third thread, the outer periphery of the probe is formed with a fourth thread, the third thread is adapted to the fourth thread, and the end of the sensor probe is flush with the end of the fourth thread.

[0013] Preferably, a heat-conducting plate is provided on one side of the first anti-slip part, and the heat-conducting plate is integrally formed with the first anti-slip part. When the first anti-slip part is connected to the detector, the heat-conducting plate is close to the sensor probe.

[0014] Preferably, the outer periphery of the detector is provided with a limiting protrusion, which is located on one side of the fourth thread. When the first anti-slip part is fully connected to the detector body, one end of the first anti-slip part abuts against the limiting protrusion.

[0015] Preferably, the sensor body further includes a protective part, which is sleeved on the optical fiber, and the sensor probe is located on the outside of one end of the protective part.

[0016] Preferably, the sensor body further includes a reinforcing part, which is sleeved on the protective part. The reinforcing part is located on the inner circumferential side of the second thread, and the length of the protective part is greater than the length of the reinforcing part.

[0017] Preferably, the inner wall of the accommodating chamber is provided with a limiting part. When the sensor body is connected to the probe, the limiting part is sleeved on the protective part, and the limiting part is flush with the end of the protective part.

[0018] (III) Beneficial Effects

[0019] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0020] 1. By installing a detachable probe on the sensor body, when the sensor is in a harsh environment, the probe is installed and its structural strength is used to protect the sensor probe from damage such as being stepped on or bumped. In a closed, safe environment that requires high-sensitivity temperature measurement, the probe is removed and the sensor probe directly contacts the surface to be measured. The characteristics of the bare probe are used to achieve millisecond-level thermal response, which meets the temperature measurement requirements of different scenarios. This achieves a dynamic balance and flexible switching between protection and thermal response speed, thus ensuring the robustness and thermal response efficiency of the temperature sensor.

[0021] 2. The sensor body housing, optical fiber, and sensor probe are combined in a compact and highly integrated manner, making them easy to install and use. They are compatible with various existing fiber optic temperature measurement technologies, such as fiber Bragg gratings and fluorescence temperature measurement. Different types of sensor probes can be selected according to requirements without significantly altering the overall structure. The fiber optic connectors use conventional interfaces, which can be adapted to mainstream optical signal transmission devices, reducing system integration difficulty and cost, and improving product versatility.

[0022] 3. The detachable connection between the detector, sensor body, and sensor probe makes manual installation and disassembly simple and efficient. The detector can be quickly assembled on-site for protection, and can be easily disassembled after installation to obtain high-response temperature measurement, adapting to changes in the entire process from use to operation and improving operational flexibility. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a temperature sensor according to the first embodiment of the present invention;

[0024] Figure 2 yes Figure 1 Schematic diagram of the cross section of AA;

[0025] Figure 3 yes Figure 2 A schematic enlarged view of part B in the middle;

[0026] Figure 4 This is a schematic diagram of the end structure of the detector and sensor body according to the second embodiment of the present invention;

[0027] Figure 5 yes Figure 4 A schematic enlarged view of a portion C in the middle;

[0028] Figure 6 This is an exploded view of the structure of the temperature sensor provided by this utility model.

[0029] Figure label:

[0030] 1. Sensor body; 11. Housing; 101. Second thread; 12. Optical fiber; 13. Sensor probe; 14. Protective part; 15. Reinforcing part;

[0031] 2. Detector; 2a. Receiving chamber; 2b. Connecting chamber; 201. First thread; 202. Fourth thread;

[0032] 3. Fiber optic connector;

[0033] 4. Anti-slip component; 41. First anti-slip part; 401. Third thread; 42. Second anti-slip part;

[0034] 5. Heat-conducting plate;

[0035] 6. Limiting protrusion;

[0036] 7. Limiting part. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0038] The accompanying drawings show schematic diagrams of layer structures according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0039] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0040] In the description of this utility model, it should be noted that the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] Combination Figures 1 to 6This utility model provides a temperature sensor that balances robustness and thermal response, including a sensor body 1, a probe 2, and an optical fiber connector 3. One end of the sensor body 1 is detachably connected to the probe 2, and the other end of the sensor body 1 is connected to the optical fiber connector 3. The sensor body 1 includes a housing 11, an optical fiber 12, and a sensor probe 13. The housing 11 is sleeved on the optical fiber 12, and the sensor probe 13 is connected to one end of the optical fiber 12. The other end of the optical fiber 12 is connected to the optical fiber connector 3. The sensor probe 13 is located outside one end of the housing 11, and the probe 2 is sleeved on the sensor probe 13 and detachably connected to one end of the sensor probe 13.

[0042] Specifically, the sensor body 1, through its internal optical fiber 12 and sensor probe 13, achieves the interaction between the optical signal and the temperature field, thereby acquiring temperature information. The probe 2 is a detachable structure; when protection is needed, it is fitted onto the sensor probe 13 to provide protection; when high-sensitivity temperature measurement is required, it is separated from the sensor body 1, allowing the temperature-measuring component to directly contact the object being measured. The optical fiber connector 3 is used to connect the sensor body 1 and the external optical signal transmission device, ensuring stable optical signal transmission. The outer shell 11 provides mechanical support and protection for the internal optical fiber 12, while also providing a structural basis for the connection with the probe 2. The optical fiber 12, as the optical signal transmission carrier, connects the sensor probe 13 and the optical fiber connector 3, transmitting the optical signal used for temperature measurement. The sensor probe 13 converts temperature changes into changes in optical signals.

[0043] During operation, the sensor body 1 transmits optical signals through optical fiber 12. The sensor probe 13 directly or indirectly contacts the object to be measured through the probe body 2, senses the temperature, and generates an optical signal. The optical signal is transmitted to an external device via optical fiber 12 and optical fiber connector 3 to complete the temperature measurement. The detachable design of the probe body 2 allows the probe body 2 to wrap around the probe during assembly, avoiding mechanical damage. It also allows for indirect heat conduction temperature measurement through the probe body 2. When the probe body 2 is disassembled, the probe directly contacts the environment to be measured, reducing the heat conduction path and improving the thermal response speed.

[0044] With this configuration, a detachable probe 2 is mounted on the sensor body 1. When the sensor is in harsh environments, the probe 2 is installed, and its structural strength protects the sensor probe 13 from damage such as being stepped on or bumped. In enclosed, safe environments requiring high-sensitivity temperature measurement, the probe 2 is removed, allowing the sensor probe 13 to directly contact the surface being measured. Leveraging the characteristics of a bare probe, it achieves millisecond-level thermal response, meeting the temperature measurement needs of different scenarios. This achieves a dynamic balance and flexible switching between protection and thermal response speed, ensuring the robustness and thermal response of the temperature sensor. The combination of the sensor body 1's housing 11, optical fiber 12, and sensor probe 13 is compact, highly integrated, and easy to install and use. It is compatible with various existing fiber optic temperature measurement technologies, such as fiber optic gratings and fluorescence temperature measurement. Different types of sensor probes 13 can be selected according to requirements without significant modifications to the overall structure. The optical fiber connector 3 uses a conventional interface, compatible with mainstream optical signal transmission devices, reducing system integration difficulty and cost, and improving product versatility. The detachable connection between the probe 2 and the sensor body 1 and sensor probe 13 makes manual installation or disassembly simple and efficient. The detector 2 can be quickly assembled on-site for protection, and can be easily disassembled after installation to obtain high-response temperature measurement, adapting to changes in the entire process from use to operation and improving the flexibility of use.

[0045] In a preferred embodiment, the detector 2 forms a receiving chamber 2a and a connecting chamber 2b, the receiving chamber 2a is in communication with the connecting chamber 2b, the sensor probe 13 passes through the connecting chamber 2b and is disposed in the receiving chamber 2a, and one end of the outer shell 11 is detachably connected to the inner wall of the connecting chamber 2b.

[0046] Specifically, the receiving chamber 2a is used to house the sensor probe 13, providing a protective space for the probe and creating a cavity environment for temperature transfer when the probe 2 comes into contact with the object being measured. The connecting chamber 2b serves as the structural area connecting the probe 2 to the outer shell 11 of the sensor body 1. Through a detachable connection with the outer shell 11, the probe 2 can be assembled and fixed. The sensor probe 13 passes through the connecting chamber 2b into the receiving chamber 2a. One end of the outer shell 11 is detachably connected to the inner wall of the connecting chamber 2b, thereby fixing the probe 2 to the sensor body 1. At this time, the receiving chamber 2a covers the sensor probe 13, protecting it from external mechanical impacts and allowing the temperature of the object being measured to be conducted to the probe inside the receiving chamber 2a through the material of the probe 2, such as thermally conductive metal, achieving temperature measurement under protective conditions. When a high response is required, the connection between the connecting chamber 2b and the outer shell 11 can be disassembled, allowing the probe 2 to be removed and exposed.

[0047] With this configuration, the receiving chamber 2a houses the sensor probe 13, while the connecting chamber 2b connects to the outer shell 11, thus protecting the probe and ensuring it is protected from mechanical damage in all directions during assembly. For example, when the probe 2 is subjected to radial impact, the sidewall of the receiving chamber 2a can directly withstand the impact force, and the connection structure between the connecting chamber 2b and the outer shell 11 can also distribute some of the load, providing dual protection for the probe. The interconnected design of the receiving chamber 2a and the connecting chamber 2b allows the sensor probe 13 to indirectly sense the temperature to be measured through the thermal conductivity of the probe 2, even though it is enclosed. If the probe 2 is made of a metal with excellent thermal conductivity, such as copper or aluminum, the heat from the object being measured can be quickly conducted through the wall of the probe 2 to the probe inside the receiving chamber 2a, meeting the basic temperature measurement accuracy requirements even under protective conditions.

[0048] It should be noted that the specific method of detachable connection between the outer shell 11 and the probe 2 is not limited here. It can be a threaded connection, snap-fit, pin connection, or interference fit, as long as it can achieve a stable connection between the probe 2 and the outer shell 11. In a preferred embodiment, a first thread 201 is formed on the inner wall of the connecting chamber 2b, and a second thread 101 is formed on the outer periphery of one end of the outer shell 11. The first thread 201 and the second thread 101 are adapted to each other, and the length of the first thread 201 is less than or equal to the length of the second thread 101.

[0049] Specifically, the first thread 201 and the second thread 101 engage to achieve a detachable connection between the probe 2 and the outer shell 11 of the sensor body 1, providing a stable mechanical connection force. When the probe 2 is rotated, the first thread 201 connecting the inner wall of the chamber 2b meshes with the second thread 101 on the outer circumference of the outer shell 11, causing the probe 2 to move axially along the outer shell 11 until it is tightened, thus fixing the probe 2 to the sensor body 1; rotating in the opposite direction allows for disassembly. The length of the first thread 201 is less than or equal to the length of the second thread 101, ensuring that the probe 2 will not excessively compress the internal sensor probe 13 due to excessive thread engagement when tightened, while also ensuring connection reliability.

[0050] With this configuration, the sensor housing 11 and the probe 2 are connected by threads, providing a large axial clamping force. This ensures that the probe 2 remains stably connected to the housing 11 under conditions of vibration and minor impact, preventing it from easily coming loose. For example, during the operation of power equipment, equipment vibration will not cause the probe 2 to separate from the housing 11, continuously providing protection for the sensor probe 13. The design that the length of the first thread 201 is less than or equal to the length of the second thread 101 serves two purposes: firstly, it prevents the probe 2 from being screwed in excessively and compressing the sensor probe 13, thus preventing damage or performance degradation due to mechanical compression; secondly, the remaining length of the second thread 101 serves as engagement redundancy, ensuring sufficient engagement length even with machining errors in the threads, improving assembly success rate and connection strength.

[0051] In a preferred embodiment, the outer side wall of the detector 2 is provided with an anti-slip component 4. The anti-slip component 4 includes a first anti-slip part 41 and at least one second anti-slip part 42. The first anti-slip part 41 is located on the outer periphery of the receiving chamber 2a. The first anti-slip part 41 is detachably connected to the end of the detector. When the first anti-slip part 41 is detached, the receiving chamber 2a is connected to the outside. The second anti-slip part 42 is fixedly sleeved on the outer periphery of the detector 2.

[0052] Specifically, the anti-slip component 4 is used to increase the friction on the surface of the detector 2 when installing or removing it, making it easier for manual assembly or disassembly. In addition to preventing slippage, the first anti-slip part 41 can also quickly switch the specific working environment of the sensor probe 13 in different scenarios. After disassembly, it connects the receiving chamber 2a with the outside world. At this time, the sensor probe 13 is directly in the temperature measurement environment and is also in the receiving chamber 2a, which protects the periphery of the sensor probe 13.

[0053] The second anti-slip part 42 is fixed on the outside of the detector body 2. When the detector body 2 is rotated to connect with the outer shell 11, the friction between the operator's hand or installation / removal tool and the second anti-slip part 42 prevents slippage and facilitates tightening or loosening. The first anti-slip part 41 is fixed to the end of the detector body 2 by a detachable connection. When it is necessary to connect the receiving chamber 2a with the outside, the first anti-slip part 41 is removed. At this time, the receiving chamber 2a where the sensor probe 13 is located is in direct contact with the outside, which can carry out heat exchange more efficiently. When the first anti-slip part 41 is assembled, it can also form a closed protection for the receiving chamber 2a.

[0054] With this design, the first anti-slip part 41 can be detached to connect with the receiving chamber 2a, allowing the temperature measurement environment to be adjusted according to needs. When high-response temperature measurement is required, the first anti-slip part 41 can be detached, connecting the receiving chamber 2a to the outside, and the sensor probe 13 can quickly sense temperature changes through air convection or direct contact. When protection and basic temperature measurement are required, the first anti-slip part 41 can be installed, forming a relatively enclosed space in the receiving chamber 2a. Heat conduction is achieved through the overall probe 2, balancing the environmental requirements for protection and temperature measurement. The second anti-slip part 42 provides basic anti-slip functionality, ensuring that the probe 2 will not be difficult to operate due to hand slippage when connected to the outer shell 11. The first anti-slip part 41 provides anti-slip for operations at the end of the probe 2, such as detaching the first anti-slip part 41 to connect with the receiving chamber 2a, facilitating easy assembly and disassembly.

[0055] It should be noted that the specific method of detachable connection between the first anti-slip part 41 and the detector 2 is not limited here. It can be a threaded connection, snap-fit, or pin connection, as long as it can achieve a stable connection between the detector 2 and the first anti-slip part 41. In a preferred embodiment, the inner wall of the first anti-slip part 41 is formed with a third thread 401, and the outer periphery of the detector 2 is formed with a fourth thread 202. The third thread 401 and the fourth thread 202 are adapted to each other, and the end of the sensor probe 13 is flush with the end of the fourth thread 202.

[0056] Specifically, the third thread 401 and the fourth thread 202 cooperate to achieve a detachable connection between the first anti-slip part 41 and the detector body 2. Simultaneously, the end of the sensor probe 13 is flush with the end of the fourth thread 202, ensuring that when the first anti-slip part 41 is tightened, the probe end and the interior of the first anti-slip part 41 form a reasonable spatial or contact relationship. When the first anti-slip part 41 is rotated, the third thread 401 on its inner wall engages with the fourth thread 202 on the outer periphery of the detector body 2, causing the first anti-slip part 41 to move axially along the detector body 2 until it is tightened. Figure 5 As shown, since the end of the sensor probe 13 is flush with the end of the fourth thread 202, after the first anti-slip part 41 is tightened, it will not excessively compress the sensor probe 13 and avoid mechanical damage, and it will also allow the end of the probe to form effective contact with the inside of the first anti-slip part 41 or leave a reasonable gap, which will protect the sensor probe 13 while also achieving efficient temperature measurement.

[0057] This design, where the end of the sensor probe 13 is flush with the end of the fourth thread 202, provides a reference for the screw-in depth of the first anti-slip part 41. It ensures that when the first anti-slip part 41 is tightened, its end is precisely in the same position as the probe end or forms a preset gap, preventing the first anti-slip part 41 from squeezing the sensor probe 13 due to excessive screwing in, thus protecting the probe's structural integrity and temperature measurement performance. When the first anti-slip part 41 is used for auxiliary temperature measurement, the flush design between the probe end and the end of the fourth thread 202 ensures that after the first anti-slip part 41 is tightened, the probe forms a stable and uniform contact with the heat-conducting components inside the first anti-slip part 41, making heat transfer more efficient and consistent, and improving the accuracy of temperature measurement under protective conditions.

[0058] In a preferred embodiment, a heat-conducting plate 5 is provided on one side of the first anti-slip part 41. The heat-conducting plate 5 is integrally formed with the first anti-slip part 41. When the first anti-slip part 41 is connected to the detector 2, the heat-conducting plate 5 is close to the sensor probe 13.

[0059] Specifically, the heat-conducting plate 5 is integrally formed with the first anti-slip part 41 to enhance the heat conduction efficiency between the first anti-slip part 41 and the sensor probe 13. During the assembly of the first anti-slip part 41, the heat of the object to be measured is transferred to the sensor probe 13 more efficiently through the heat-conducting plate 5. When the first anti-slip part 41 is connected to the detector 2, the heat-conducting plate 5 is close to the sensor probe 13. If the detector 2 is in contact with the object to be measured at this time, the heat of the object to be measured is first transferred to the detector 2, and then quickly conducted to the sensor probe 13 through the heat-conducting plate 5. Compared with the heat conduction only through the wall of the detector 2, the heat transfer path is shorter and the heat conduction efficiency is higher, thereby improving the temperature measurement response speed under protective conditions.

[0060] With this design, the heat-conducting plate 5 and the first anti-slip part 41 are integrally formed, and materials with excellent thermal conductivity, such as copper, aluminum, or high thermal conductivity alloys, are selected. The heat-conducting plate 5 can transfer heat more efficiently, significantly improving the temperature measurement response speed under protective conditions. The integrally formed design ensures the continuity and stability of heat conduction, while also improving the mechanical strength of the structure. The heat-conducting plate 5 is not easily detached or deformed due to external forces, ensuring the consistency of thermal conductivity performance during long-term use.

[0061] In a preferred embodiment, a limiting protrusion 6 is provided on the outer periphery of the detector. The limiting protrusion 6 is located on one side of the fourth thread 202. When the first anti-slip part 41 is fully connected to the detector body 2, one end of the first anti-slip part 41 abuts against the limiting protrusion 6.

[0062] Specifically, the limiting protrusion 6 is located on the outer periphery of the probe 2, on one side of the fourth thread 202. It abuts against one end of the first anti-slip part 41 when the first anti-slip part 41 is fully connected to the probe 2, limiting the screw-in depth of the first anti-slip part 41. When the first anti-slip part 41 is rotated to engage with the fourth thread 202 of the probe 2, the first anti-slip part 41 moves axially along the probe 2 until one end abuts against the limiting protrusion 6. At this point, the first anti-slip part 41 reaches its maximum screw-in depth and cannot be screwed in further, thus preventing the first anti-slip part 41 from pressing against the sensor probe 13 or the heat-conducting plate 5 due to excessive screwing.

[0063] With this design, the limiting protrusion 6 mechanically restricts the screwing depth of the first anti-slip part 41, completely avoiding problems such as damage to the sensor probe 13 or deformation of the heat-conducting plate 5 caused by excessive rotation during manual operation. The presence of the limiting protrusion 6 ensures that the final position of the first anti-slip part 41 remains consistent each time it is assembled, abutting against the limiting protrusion 6. This ensures that the relative position, contact pressure, and other parameters between the sensor probe 13 and the heat-conducting plate 5 inside the first anti-slip part 41 are consistent, thereby guaranteeing the stability of data during repeated temperature measurements.

[0064] In a preferred embodiment, the sensor body 1 further includes a protective portion 14, which is sleeved on the optical fiber 12, and the sensor probe 13 is located on the outside of one end of the protective portion 14.

[0065] Specifically, the protective part 14 is fitted onto the optical fiber 12, providing additional protection for the optical fiber 12 and providing a mounting base for the sensor probe 13, placing it on the outer side of one end of the protective part 14, further enhancing the mechanical strength of the surrounding structure of the sensor probe 13. The protective part 14 wraps around the optical fiber 12, located inside the housing 11 or cooperating with the housing 11. On the one hand, it enhances the tensile and bending resistance of the optical fiber 12, preventing the optical fiber 12 from breaking or losing optical signal due to external forces; on the other hand, the sensor probe 13 is mounted on the outer side of the end of the protective part 14, and the protective part 14, through its own structural strength, provides a certain lateral support for the probe, reducing the lateral impact force on the probe.

[0066] With this design, the protective section 14 is fitted onto the optical fiber 12. It can be made of materials that combine flexibility and strength, such as polyimide tubing or metal corrugated tubing, providing tensile and bending resistance to the optical fiber 12. For example, during sensor installation, if the optical fiber 12 is stretched or bent, the protective section 14 can absorb most of the stress, preventing direct damage to the optical fiber 12 and ensuring stable transmission of the optical signal. As a component independent of the outer casing 11, the protective section 14 can be made of different materials or structures to meet different protection requirements. If a section of the protective section 14 wears out due to long-term use, it can be replaced individually without replacing the entire sensor body 1, reducing maintenance costs.

[0067] In a preferred embodiment, the sensor body 1 further includes a reinforcing part 15, which is sleeved on the protective part 14. The reinforcing part 15 is located on the inner circumferential side of the second thread 101, and the length of the protective part 14 is greater than the length of the reinforcing part 15.

[0068] Specifically, the reinforcing part 15 is fitted onto the protective part 14, located on the inner circumference of the second thread 101. It enhances the structural strength of the connection area between the protective part 14 and the outer shell 11, preventing damage to this area due to stress concentration from the threaded connection or external forces. The reinforcing part 15 wraps around the outer side of the protective part 14 and is located in the inner circumference region of the second thread 101 on the outer shell 11, which is the critical stress area connecting the probe 2 and the outer shell 11. When the probe 2 and the outer shell 11 are connected by threads, the stress generated during connection and the impact from external forces received during use can be distributed to the protective part 14 and the outer shell 11 through the reinforcing part 15, preventing cracks and deformations in the protective part 14 or the outer shell 11 due to stress concentration at the root of the thread. Simultaneously, the reinforcing part 15 also improves the overall rigidity of the protective part 14, enhancing its support for the optical fiber 12 and the probe.

[0069] In the preferred case, such as Figure 2 and Figure 3As shown, the end of the reinforcing part 15 is flush with the end of the housing 11, and the end of the protective part 14 near the sensor probe 13 extends out of the end of the reinforcing part 15 (left side in the figure), while the other end of the protective part 14 extends beyond the right end of the second thread 101.

[0070] With this design, the threaded connection area is a stress concentration point. The reinforcement 15 effectively disperses the axial and radial forces during thread engagement, preventing damage to the outer shell 11 or the protective part 14 due to stress concentration. The reinforcement 15, fitted onto the protective part 14, enhances the overall rigidity of the protective part 14, making it less prone to bending or deformation under lateral impact, thus better protecting the internal optical fiber 12 and sensor probe 13. For example, in a construction site, if the sensor is impacted, the reinforcement 15 can withstand some of the impact force through its rigidity, reducing the deformation of the protective part 14 and protecting the optical fiber 12 from compression. The synergistic effect of the reinforcement 15, the protective part 14, and the outer shell 11 forms a multi-layered protective structure from the inside out. The optical fiber 12 is protected by the protective part 14, the protective part 14 is reinforced by the reinforcement 15, and the connection area between the reinforcement 15 and the outer shell 11 is further strengthened by the threads and the reinforcement 15, systematically improving the mechanical strength of the entire sensor body 1 and making it more adaptable to harsh construction or industrial environments.

[0071] In a preferred embodiment, a limiting part 7 is provided on the peripheral inner wall of the receiving chamber 2a. When the sensor body 1 is connected to the detector 2, the limiting part 7 is sleeved on the protective part 14, and the limiting part 7 is flush with the end of the protective part 14.

[0072] Specifically, such as Figure 5 As shown, the limiting part 7 is disposed on the inner wall of the accommodating chamber 2a. When the sensor body 1 is connected to the probe 2, it is sleeved on the protective part 14 and flush with the end of the protective part 14. This is used to limit the relative position of the probe 2 and the sensor body 1 and ensure assembly accuracy. When the probe 2 is connected to the sensor body 1, the limiting part 7 on the inner wall of the accommodating chamber 2a will be sleeved on the protective part 14 until the limiting part 7 is flush with the end of the protective part 14. At this time, the axial relative position of the probe 2 and the sensor body 1 is fixed, preventing the probe 2 from being over-sleeved and pressing the sensor probe 13, while ensuring that the connection between the probe 2 and the outer shell 11 is in the optimal stress state.

[0073] This design, with the limiting part 7 flush with the end of the protective part 14, provides a clear axial positioning reference for the assembly of the probe 2 and the sensor body 1. This ensures that after each assembly, the relative positions of the probe 2, sensor probe 13, protective part 14, and other components are consistent, avoiding protective failure or temperature measurement errors caused by assembly position deviations. The limiting part 7 restricts the axial movement of the probe 2, effectively preventing the probe 2 from directly pressing the sensor probe 13 due to over-insertion, thus protecting the probe's structure and performance. The limiting part 7, fitted onto the protective part 14, not only provides axial positioning but also offers a certain degree of radial calibration for the connection between the probe 2 and the sensor body 1, resulting in more uniform meshing of threaded connections and improving connection stability.

[0074] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A temperature sensor that balances robustness and thermal response, characterized in that, The temperature sensor includes a sensor body (1), a probe (2) and an optical fiber connector (3). One end of the sensor body (1) is detachably connected to the probe (2), and the other end of the sensor body (1) is connected to the optical fiber connector (3). The sensor body (1) includes a housing (11), an optical fiber (12), and a sensor probe (13). The housing (11) is sleeved on the optical fiber (12). The sensor probe (13) is connected to one end of the optical fiber (12), and the other end of the optical fiber (12) is connected to the optical fiber connector (3). The sensor probe (13) is located outside one end of the housing (11). The probe body (2) is sleeved on the sensor probe (13) and is detachably connected to one end of the sensor probe (13).

2. The temperature sensor according to claim 1, characterized in that, The detector (2) forms a receiving chamber (2a) and a connecting chamber (2b), the receiving chamber (2a) is connected to the connecting chamber (2b), the sensor probe (13) passes through the connecting chamber (2b) and is disposed in the receiving chamber (2a), and one end of the outer shell (11) is detachably connected to the inner wall of the connecting chamber (2b).

3. The temperature sensor according to claim 2, characterized in that, The inner wall of the connecting chamber (2b) is formed with a first thread (201), and the outer periphery of one end of the outer shell (11) is formed with a second thread (101). The first thread (201) is adapted to the second thread (101), and the length of the first thread (201) is less than or equal to the length of the second thread (101).

4. The temperature sensor according to claim 2, characterized in that, The outer side wall of the detector (2) is provided with an anti-slip component (4). The anti-slip component (4) includes a first anti-slip part (41) and at least one second anti-slip part (42). The first anti-slip part (41) is located on the outer periphery of the receiving chamber (2a). The first anti-slip part (41) is detachably connected to the end of the detector. When the first anti-slip part (41) is detached, the receiving chamber (2a) is connected to the outside. The second anti-slip part (42) is fixedly sleeved on the outer periphery of the detector (2).

5. The temperature sensor according to claim 4, characterized in that, The inner wall of the first anti-slip part (41) is formed with a third thread (401), and the outer periphery of the probe (2) is formed with a fourth thread (202). The third thread (401) is adapted to the fourth thread (202), and the end of the sensor probe (13) is flush with the end of the fourth thread (202).

6. The temperature sensor according to claim 5, characterized in that, A heat-conducting plate (5) is provided on one side of the first anti-slip part (41). The heat-conducting plate (5) is integrally formed with the first anti-slip part (41). When the first anti-slip part (41) is connected to the detector (2), the heat-conducting plate (5) is close to the sensor probe (13).

7. The temperature sensor according to claim 6, characterized in that, The detector has a limiting protrusion (6) on its outer periphery. The limiting protrusion (6) is located on one side of the fourth thread (202). When the first anti-slip part (41) is fully connected to the detector body (2), one end of the first anti-slip part (41) abuts against the limiting protrusion (6).

8. The temperature sensor according to claim 3, characterized in that, The sensor body (1) also includes a protective part (14), which is sleeved on the optical fiber (12), and the sensor probe (13) is located on the outside of one end of the protective part (14).

9. The temperature sensor according to claim 8, characterized in that, The sensor body (1) further includes a reinforcing part (15), which is sleeved on the protective part (14). The reinforcing part (15) is located on the inner circumferential side of the second thread (101), and the length of the protective part (14) is greater than the length of the reinforcing part (15).

10. The temperature sensor according to claim 9, characterized in that, The circumferential inner wall of the accommodating chamber (2a) is provided with a limiting part (7). When the sensor body (1) is connected to the probe (2), the limiting part (7) is sleeved on the protective part (14), and the limiting part (7) is flush with the end of the protective part (14).

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