Temperature measuring device and temperature measuring system

Abstract

The invention provides a temperature measuring device and a temperature measuring system. The temperature measuring device comprises a shell, an optical cable and a steel wire rope. The optical cable comprises a first fiber, a second fiber and a middle protective sleeve. The first middle section of the first fiber and the second middle section of the second fiber are located in the middle protective sleeve. The first upper section of the first optical fiber and the second upper section of the second optical fiber are located on the first side of the middle protective sleeve, and the first lower section of the first optical fiber and the second lower section of the second optical fiber are located on the second side, opposite to the first side, of the middle protective sleeve. The first lower section and the second lower section are electrically connected and are located in the accommodating cavity of the shell, so that the use length of the optical cable is shortened, and the cost and the construction difficulty are reduced. The steel wire rope is fixed to at least one of the middle protective sleeve and the shell. The steel wire rope comprises a hook part, the end of the hook part protrudes out of the insertion part of the shell so as to abut against a downward probing tool to achieve downward probing, and the device can be suitable for an after-loading scene.

Description

Technical Field

[0001] This application relates to the field of temperature measuring devices, and more particularly to temperature measuring devices and temperature measuring systems. Background Technology

[0002] As is well known, the key to successful grain storage is maintaining the temperature of the grain silo within a certain range. Therefore, monitoring the temperature of grain silos is essential. Currently, most temperature monitoring devices use temperature-sensing cables as conventional measuring devices. However, these cables are active devices and contain built-in temperature-sensing resistors, resulting in point-based temperature measurement that is not comprehensive enough for the grain silo and leads to poor monitoring performance. Summary of the Invention

[0003] This application provides a temperature measuring device and system with better temperature measurement effect and suitable for aftermarket scenarios.

[0004] This application provides a temperature measuring device, including a housing, an optical cable, and a steel wire rope. The housing forms a receiving cavity and includes an insertion part and a top disposed opposite to the insertion part. The optical cable includes a first optical fiber, a second optical fiber, and a middle protective sleeve. The first optical fiber includes a first upper section, a first middle section, and a first lower section. The second optical fiber includes a second upper section, a second middle section, and a second lower section. The first middle section and the second middle section are located inside the middle protective sleeve. The first upper section and the second upper section are located on a first side of the middle protective sleeve, and the first lower section and the second lower section are located on a second side of the middle protective sleeve. The first side and the second side are disposed opposite to each other. The first lower section and the second lower section are electrically connected and both are located inside the receiving cavity. At least a portion of the first upper section and at least a portion of the second upper section protrudes from the top. The steel wire rope is fixed to at least one of the middle protective sleeve and the housing. The steel wire rope includes a hook, the end of which protrudes from the insertion part for abutting against a lowering tool. The lowering tool carries the temperature measuring device down to the location where temperature measurement is required.

[0005] Furthermore, the first lower segment and the second lower segment are arranged along the edge of the receiving cavity; and / or, The first lower segment and the second lower segment are fixed to the outer casing; and / or, The receiving cavity is elongated elliptical, and the radius of the semicircle at the end of the elongated ellipse is greater than or equal to 25 mm.

[0006] Furthermore, the first lower segment and the second lower segment are fused together and fixed, and the optical cable includes a sleeve to cover the fused connection between the first lower segment and the second lower segment; or, The first lower section is fixedly connected to the second lower section flange.

[0007] Furthermore, the top is provided with a first groove, one end of the middle protective sleeve is located in the first groove, and along the direction from the top to the insertion part, the middle protective sleeve abuts against the outer shell; and / or, The insertion part is shaped like a pointed tip or a bullet.

[0008] Further, the outer casing includes a first outer casing and a second outer casing fixed to the first outer casing, the first outer casing and the second outer casing being disposed along the thickness direction of the temperature measuring device, and the first outer casing and the second outer casing forming the receiving cavity; or, The outer casing includes a first outer casing and a second outer casing fixed to the first outer casing. The first outer casing and the second outer casing are arranged along the length direction of the temperature measuring device and form the receiving cavity. The temperature measuring device includes a U-shaped tube, which is sleeved at the bend after the first lower section and the second lower section are connected.

[0009] Furthermore, the outer casing includes a protrusion extending into the receiving cavity, the protrusion being located at the center of the receiving cavity, and the protrusion having a groove to receive a portion of the wire rope.

[0010] Furthermore, the wire rope includes a fixed section fixed to the middle protective sleeve and an extension section connected to the fixed section. The extension section includes a main body section located within the receiving cavity, and the hook is connected to the main body section.

[0011] Furthermore, the optical cable includes the steel wire rope, the fixed section is located inside the middle protective sleeve, and after removing the lower protective sleeve, the first lower section, the second lower section, and the extension section of the steel wire rope are exposed; and / or, The end of the extension is bent to form the hook, and the temperature measuring device includes a fixing member to secure the free end of the hook to the main body section; and / or, The insertion part is provided with a second groove, and the fixing member is located in the second groove. Along the direction from the top to the insertion part, the fixing member abuts against the outer shell.

[0012] Furthermore, the steel wire rope and the outer shell are injection molded together.

[0013] This application also provides a temperature measurement system, including a host and the temperature measuring devices. Multiple temperature measuring devices are connected in series through multiple first upper sections and multiple second upper sections. The first upper section or the second upper section of two temperature measuring devices located at both ends are electrically connected to the host.

[0014] The temperature measuring device of this application includes an optical cable. Utilizing optical fiber temperature measurement not only provides high measurement accuracy but also avoids potential safety hazards as the optical cable is a passive sensor. The first and second optical fibers of the optical cable are electrically connected to form a single optical fiber. Compared to using a single optical fiber for wiring, this fully utilizes the length of the first and second optical fibers to increase the length of the fiber after wiring, shortening the total length of the optical cable and reducing production complexity and on-site construction difficulty while ensuring cost control. Furthermore, the outer shell protects the connection between the first and second optical fibers to prevent disconnection and abnormal temperature detection. The end of the hook protrudes from the insertion part of the outer shell to abut against the lowering tool for lowering, making it suitable for retrofitting scenarios. The insertion part reduces resistance during lowering, facilitating easier lowering. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a temperature measuring device according to an embodiment of the present application, wherein the first upper section of the first optical fiber and the second upper section of the second optical fiber are shown. Figure 2 yes Figure 1 An exploded view of the temperature measuring device shown. Figure 3 yes Figure 2 The diagram shown is a schematic of the steel wire rope after it has been fixed to the second outer shell. Figure 4 yes Figure 1 The schematic diagram of the temperature measuring device shown is not shown, in which the first upper section of the first optical fiber and the second upper section of the second optical fiber are not shown. Figure 5 yes Figure 1 The diagram shows the temperature measuring device in conjunction with the probe tool. Figure 6 yes Figure 2 The diagram shown is of the optical cable before stripping. Figure 7 yes Figure 6 The diagram shown is a schematic of the optical cable after the upper protective sleeve has been removed. Figure 8 yes Figure 7 The diagram shown is a schematic of the optical cable after the lower protective sleeve has been removed. Figure 9 yes Figure 8 The diagram shows the electrical connection between the first lower segment of the first optical fiber and the second lower segment of the second optical fiber. Figure 10 yes Figure 1 A schematic diagram of another embodiment of the temperature measuring device is shown, wherein the first upper section of the first optical fiber and the second upper section of the second optical fiber are not shown. Figure 11 yes Figure 10Exploded view of the temperature measuring device shown, where the first upper section of the first optical fiber and the second upper section of the second optical fiber are not shown; Figure 12 is Figure 1 Exploded view of another embodiment of the temperature measuring device shown, where the first upper section of the first optical fiber and the second upper section of the second optical fiber are not shown; Figure 13 is Figure 12 Schematic diagram of the temperature measuring device shown after removing the first housing, where the first upper section of the first optical fiber and the second upper section of the second optical fiber are not shown; Figure 14 are multiple Figure 1 Schematic diagram of the temperature measuring devices shown connected in series and arranged in a granary. Detailed implementation mode

[0016] Here, the technical solutions in the embodiments (or "implementation modes") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0017] If there are terms related to directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement conditions between components in a certain specific posture (as shown in the accompanying drawings); if this specific posture changes, then the directional indication or positional relationship also changes accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be understood as indicating or implying relative importance.

[0018] Refer Figures 1 to 2 , the temperature measuring device 100 of the implementation mode of the present application includes a housing 1 and an optical cable 2. The housing 1 is provided with a receiving cavity 141. The optical cable 2 includes a first optical fiber 21, a second optical fiber 22, and a middle protective sleeve 23. The first optical fiber 21 includes a first upper section 211, a first middle section (not shown), and a first lower section 213. The second optical fiber 22 includes a second upper section 221, a second middle section (not shown), and a second lower section 223. The first middle section and the second middle section are located inside the middle protective sleeve 23. The first upper section 211 and the second upper section 221 are located on the first side of the middle protective sleeve 23. The first lower section 213 and the second lower section 223 are located on the second side of the middle protective sleeve 23. The first side and the second side are arranged opposite to each other. In Figure 3 , the first side is the upper side of the middle protective sleeve 23, and the second side is the lower side of the middle protective sleeve 23.

[0019] The first lower segment 213 is electrically connected to the second lower segment 223 and both are located inside the accommodation cavity 141. At least part of the first upper segment 211 and at least part of the second upper segment 221 are located outside the housing 1, facilitating the series connection of multiple temperature measurement devices 100.

[0020] The temperature measurement device 100 according to the embodiment of the present application uses an optical cable 2 for temperature measurement, subverting the bottlenecks of traditional temperature-sensing cables and optical fiber temperature measurement, solving the problem of point-type temperature measurement, and having high measurement accuracy; moreover, the optical cable 2 is a passive sensor, which can avoid potential safety hazards.

[0021] The first optical fiber 21 and the second optical fiber 22 of the optical cable 2 of the temperature measurement device 100 according to the embodiment of the present application are electrically connected into one optical fiber. Compared with using the first optical fiber 21 or the second optical fiber 22 of the entire optical cable 2 for wiring, the lengths of the first optical fiber 21 and the second optical fiber 22 of the optical cable 2 are fully utilized to increase the length of the optical fiber after wiring, shortening the total usage length of the optical cable 2, and reducing the complexity of production and the difficulty of on-site construction on the premise of ensuring the cost. For example, if the length after the connection of the first optical fiber 21 and the second optical fiber 22 is 2 meters, then only 1 meter of the optical cable 2 is used. If the entire optical cable 2 is used for wiring, 2 meters of the optical cable 2 are required. Obviously, the temperature measurement device 100 of the present application shortens the total usage length of the optical cable 2.

[0022] The housing 1 of the temperature measurement device 100 according to the embodiment of the present application can protect the connection part of the first optical fiber 21 and the second optical fiber 22 to prevent disconnection from causing abnormal temperature detection; the setting of the housing 1 enables the temperature measurement device 100 to be lowered during use, which is applicable to the post-installation scenario of the temperature measurement device 100. The position and quantity of the temperature measurement device 100 can be randomly changed according to the usage requirements, and it is also convenient to replace the temperature measurement device 100, making the use more flexible; at the same time, the temperature measurement device 100 is modularly arranged, which is more convenient to arrange during use. The temperature measurement device 100 can also be applied to the pre-installation scenario.

[0023] The post-installation scenario means that the temperature measurement device 100 is lowered into the interior of the grain pile, and the pre-installation scenario means that the temperature measurement device 100 is arranged first and then the grain is put in. Lowering means moving from top to bottom. For example, the temperature measurement device 100 moves from above the grain pile to the interior of the grain pile.

[0024] The temperature measurement device 100 according to the embodiment of the present application can be applied in a granary to monitor the temperature of grains, cereals or flour in real time, and upload the temperature measurement data to the host for data processing, and determine the health of the granary by judging whether the temperature in the whole granary meets the requirements.

[0025] In one embodiment, at least part of the middle protective sleeve 23 is located outside the housing 1, making the volume of the housing 1 smaller, which is beneficial to the miniaturization of the temperature measurement device 100 and reducing the downward resistance.

[0026] See Figure 3 In one embodiment, the first lower segment 213 and the second lower segment 223 are connected and coiled within the receiving cavity 141. The first lower segment 213 and the second lower segment 223 are arranged along the edge of the receiving cavity 141, and the bending radius of the first lower segment 213 and the second lower segment 223 after being connected and arranged within the receiving cavity 141 is maximized. The larger the bending radius, the lower the optical loss and the more accurate the measurement results.

[0027] In one embodiment, the receiving cavity 141 is elongated ellipse, and the radius of the semicircle at the end of the elongated ellipse is greater than or equal to 25 mm, ensuring that the bending radius is ≥25 mm, so as to minimize light loss and improve the accuracy of measurement results.

[0028] In one embodiment, the first lower segment 213 and the second lower segment 223 are fixed to the outer casing 1 to prevent the first lower segment 213 and the second lower segment 223 from moving, so as to prevent breakage or disconnection of the connection and cause abnormal temperature detection.

[0029] In one embodiment, the first lower section 213 and the second lower section 223 after fiber coiling are fixed in the receiving cavity 141 by adhesive, snap-fit ​​or potting.

[0030] In one embodiment, the first lower segment 213 and the second lower segment 223 are fixed by fiber splicing. The loss at the fiber splicing position is approximately 0.1dB, which provides a permanent connection with lower loss, higher reliability and longer life, without increasing the space occupied. This is beneficial for the miniaturization of the temperature measuring device 100, so as to reduce the resistance during downward movement and facilitate downward movement.

[0031] Fiber fusion splicing, also known as optical fiber fusion, is a technique that fuses the ends of two optical fibers together at high temperatures to achieve continuous optical signal transmission. In one implementation, fusion splicing utilizes the high temperature (approximately 2000°C) generated by a high-voltage electric arc discharge to rapidly melt the end faces of the two optical fibers, fusing them together under surface tension. After cooling, a strong, low-loss connection is formed. The fusion splicer uses a high-precision optical system to precisely align the cores of the two optical fibers (three-dimensional alignment along the X and Y axes), then applies an electric arc while simultaneously using precision mechanical devices to smoothly advance the fibers, ensuring the quality of the splice.

[0032] In another embodiment, the first lower section 213 and the second lower section 223 are fixed by a flange connection. Compared with fiber optic welding, the loss is relatively large, and the flange head occupies a large space, which will increase the volume of the temperature measuring device 100 and is not conducive to downward probe.

[0033] In one embodiment, the optical cable 2 includes a sleeve 24 to cover the fusion splice joint between the first lower segment 213 and the second lower segment 223, thereby increasing the strength of the fusion splice joint between the first lower segment 213 and the second lower segment 223 to prevent breakage at this point and thus prevent abnormal temperature detection.

[0034] In one embodiment, the sleeve 24 is a heat-shrinkable sleeve, which is more convenient to use.

[0035] Before fusing the first lower segment 213 and the second lower segment 223, the sleeve 24 is sleeved on the first lower segment 213 or the second lower segment 223. After the first lower segment 213 and the second lower segment 223 are fused and fixed, the sleeve 24 is moved to the fusion joint and heat-shrunk to ensure the strength of the welded joint and prevent disconnection.

[0036] In one embodiment, the housing 1 is provided with a first groove 142. One end of the middle protective sleeve 23 is located in the first groove 142, and along the direction from the first upper segment 211 to the first lower segment 213, the middle protective sleeve 23 abuts against the housing 1. During the process of the temperature measuring device 100 being lowered, it is ensured that the optical cable 2 does not move relative to the housing 1 to protect the first optical fiber 21 and the second optical fiber 22 from breaking.

[0037] In one embodiment, one end of the middle protective sleeve 23 is in a tight fit with the first groove 142, which can prevent the middle protective sleeve 23 from shaking.

[0038] See Figures 1 to 5 , in one embodiment, the temperature measuring device 100 includes a steel wire rope 3. The steel wire rope 3 includes a fixed section (not shown) fixed to the middle protective sleeve 23 and an extension section 32 connected to the fixed section. Along the direction from the first upper segment 211 to the first lower segment 213, the extension section 32 and the first lower segment 213 and the second lower segment 223 are on the same side of the middle protective sleeve 23. The extension section 32 includes a main body section 321 located in the receiving cavity 141 and a hook portion 322 connected to the main body section 321. The end of the hook portion 322 protrudes from the housing 1 for abutting against the lowering tool 200, and the lowering tool 200 lowers the temperature measuring device 100 to the position where temperature measurement is required.

[0039] The arrangement of the steel wire rope 3 not only facilitates the lowering of the temperature measuring device 100, but also serves as a stress point during the lowering process to ensure that the optical cable 2 is not stressed during the lowering process to protect the optical cable 2. When the temperature measuring device 100 can also be applied to the pre-installation scenario, the hook portion 322 can be hooked from below to facilitate fixing the temperature measuring device 100.

[0040] In one embodiment, the end of the extension section 32 is bent to form the hook portion 322. The temperature measuring device 100 includes a fixing member 4 to fix the free end of the hook portion 322 and the main body section 321. The hook portion 322 is in a closed ring shape, which not only facilitates the cooperation between the temperature measuring device 100 and the lowering tool 200, but also prevents the two from accidentally separating during the lowering process to ensure that the temperature measuring device 100 is lowered to the preset position.

[0041] In one embodiment, the lowering tool 200 includes a rod-shaped portion 201 and a crimping portion 202 extending obliquely from the rod-shaped portion 201. During lowering, the crimping portion 202 passes into the space formed by the hook portion 322 and crimps onto the hook portion 322. When downward pressure is applied to the rod-shaped portion 201, the crimping portion 202 applies a crimping force to the hook portion 322 to lower the temperature measuring device 100.

[0042] In one embodiment, the outer casing 1 is provided with a second groove 143. The fixing member 4 is located within the second groove 143. Along the direction from the first upper section 211 to the first lower section 213, the fixing member 4 abuts against the outer casing 1. During the downward movement of the temperature measuring device 100, it is ensured that the outer casing 1 will not move relative to the steel wire rope 3 and the optical cable 2 will not move relative to the outer casing 1, so as to protect the fusion splice between the first optical fiber 21 and the second optical fiber 22 and prevent disconnection.

[0043] In one embodiment, the fastener 4 is fixed to the outer casing 1 by means of welding, bonding or tight fitting, which is more effective in preventing the outer casing 1 from moving relative to the wire rope 3 and the optical cable 2 from moving relative to the outer casing 1.

[0044] In one embodiment, the housing 1 includes a protrusion 144 extending into the receiving cavity 141. The protrusion 144 is located at the center of the receiving cavity 141. The protrusion 144 is provided with a groove 1441 to receive a portion of the wire rope 3, which ensures that the wire rope 3 does not sway relative to the housing 1 and ensures a balanced downward force.

[0045] In one embodiment, the wire rope 3 is tightly fitted with the groove 1441, which further improves the effect of preventing the wire rope 3 from swaying.

[0046] In one embodiment, the wire rope 3 is located in the center of the receiving cavity 141 along the width direction W of the outer shell 1 to ensure that the temperature measuring device 100 is subjected to balanced force.

[0047] In one embodiment, the housing 1 is made of metal to ensure its strength and extend its service life. In another embodiment, the housing 1 is made of stainless steel to prevent rust and ensure its strength.

[0048] In one embodiment, the outer shell 1 is overall narrow and long, including an insertion portion 11 and a top portion 12. Along the length direction L of the outer shell 1, the insertion portion 11 and the top portion 12 are oppositely arranged. A first groove 142 is provided in the top portion 12, and a second groove 143 is provided in the insertion portion 11. At least a part of the first upper segment 211 and at least a part of the second upper segment 221 protrude out of the top portion 12 of the outer shell 1 to be exposed outside the outer shell 1. The middle protective sleeve 23 protrudes from the top portion 12. The end of the hook portion 322 protrudes from the insertion portion 11. The direction from the first upper segment 211 to the first lower segment 213 is the same as the direction from the top portion 12 to the insertion portion 11. The insertion portion 11 is in a pointed shape, which can not only reduce the resistance generated by the outer shell 1 during the downward probing process, but also play a guiding and traction role during the downward probing process to facilitate the downward probing.

[0049] Refer Figures 6 to 9 , in one embodiment, the optical cable 2 includes a steel wire rope 3, that is, the steel wire rope 3 is a part of the optical cable 2, which enhances the mechanical strength of the optical cable 2 and prevents the first optical fiber 21 and the second optical fiber 22 from breaking. The fixed section is located inside the middle protective sleeve 23. After removing the upper protective sleeve 25 of the optical cable 2, the first upper segment 211 and the second upper segment 221 are exposed. After removing the lower protective sleeve 26 of the optical cable 2, the first lower segment 213, the second lower segment 223 and the extended section 32 of the steel wire rope 3 are exposed. After the first lower segment 213 and the second lower segment 223 are fixed, a sleeve 24 is put on. The middle protective sleeve 23 is located between the upper protective sleeve and the lower protective sleeve. A part of the steel wire rope 3 exposed after removing the upper protective sleeve can be cut off. In one embodiment, the cut end can be knotted to increase the stability of the steel wire rope 3. By using the steel wire rope 3 of the optical cable 2 itself without additionally adding a steel wire rope 3, not only the process of fixing the steel wire rope 3 is saved, but also the stability of the steel wire rope 3 is increased.

[0050] In another embodiment, the optical cable 2 does not include the upper protective sleeve 25, the first upper segment 211 and the second upper segment 221 are located above the middle protective sleeve 23, and after removing the lower protective sleeve 26 of the optical cable 2, the first lower segment 213, the second lower segment 223 and the extended section 32 of the steel wire rope 3 are exposed.

[0051] Peel off the lower protective sleeve 26 from the bottom of the optical cable 2 to expose the first lower segment 213, the second lower segment 223 and the extended section 32 of the steel wire rope 3. The lengths of the first lower segment 213, the second lower segment 223 and the extended section 32 of the steel wire rope 3 are strongly related to factors such as the process. Since the downward probing starts from the bottom of the temperature measuring device 100 and the stress point of the steel wire rope 3 is also at the bottom of the temperature measuring device 100, peeling at the bottom can facilitate using the steel wire rope 3 structure of the optical cable 2 to process into a hook portion 322 for cooperation with the downward probing tool 200 to facilitate the downward probing.

[0052] In one embodiment, the optical cable 2 includes a strengthening layer 27 covering the outside of the first optical fiber 21, the second optical fiber 22 and the steel wire rope 3 and a steel strand 28 located outside the strengthening layer 27.

[0053] In another embodiment, the optical cable 2 may not include the steel wire rope 3, and it is only necessary to fix the separately provided steel wire rope 3 to the optical cable 2. The steel wire rope 3 may be located below the middle protective sleeve 23 and its fixed section is connected and fixed to the middle protective sleeve 23. Alternatively, the fixed section of the steel wire rope 3 is located outside the middle protective sleeve 23 and is fixed to the middle protective sleeve 23.

[0054] In one embodiment, the housing 1 includes a first housing 13 and a second housing 14 to facilitate the processing and assembly of the optical cable 2. The first housing 13 and the second housing 14 are fixed by screws 15, which facilitates the assembly and disassembly of the housing 1. The first housing 13 and the second housing 14 may also be fixed by means such as snap connection, welding or bonding.

[0055] Refer Figure 4 , the first housing 13 and the second housing 14 are arranged along the thickness direction D of the temperature measuring device 100. The optical cable 2 can be fixed to the second housing 14 first, and then the first housing 13 and the second housing 14 are fixed. The states of the first lower segment 213 and the second lower segment 223 in the receiving cavity 141 can be seen intuitively, preventing kinking or extrusion, and preventing the temperature measuring device 100 from failing to measure temperature.

[0056] The receiving cavity 141 can be entirely arranged in the first housing 13 or the second housing 14, or can be partially arranged in the first housing 13 and partially arranged in the second housing 14. The first groove 142 can be entirely arranged in the first housing 13 or the second housing 14, or can be partially arranged in the first housing 13 and partially arranged in the second housing 14. The second groove 143 can be entirely arranged in the first housing 13 or the second housing 14, or can be partially arranged in the first housing 13 and partially arranged in the second housing 14. A convex block 144 can be arranged on one of the first housing 13 and the second housing 14, or convex blocks 144 can be arranged on both of them.

[0057] Refer Figures 10 to 11 , in another embodiment, the first housing 13 and the second housing 14 are arranged along the length direction L of the housing 1. The insertion part 11 is arranged on the first housing 13, and the top part 12 is arranged on the second housing 14. The first housing 13 and the second housing 14 can be fixed by threaded connection, or can be fixed by means such as screw locking, welding or bonding.

[0058] The housing 1 is cylindrical, and the insertion part 11 is in a spout shape or a bullet head shape to reduce the downward penetration resistance. In one embodiment, the top part 12 is in a spout shape or a bullet head shape to reduce the resistance during upward pulling.

[0059] In one embodiment, the temperature measuring device 100 includes a limiting member 5. The limiting member 5 is fixed to the wire rope 3 and is located in the receiving cavity 141. The limiting member 5 abuts against or is fixed to the outer shell 1 to limit the movement of the wire rope 3 relative to the outer shell 1.

[0060] In one embodiment, after the first lower segment 213 and the second lower segment 223 are fixed, a U-shaped tube 29 is sleeved thereon. The provision of the U-shaped tube 29 can ensure the bending radius of the first lower segment 213 and the second lower segment 223 arranged in the receiving cavity 141 after connection, so as to reduce optical loss and improve the accuracy of the measurement result.

[0061] In one embodiment, the U-shaped tube 29 is fixed to the wire rope 3 to prevent the first lower segment 213 and the second lower segment 223 from shaking and breaking due to stress. [[ID=][7]]

[0062] The materials of the U-shaped tube 29 and the sleeve 24 may be the same or different. The U-shaped tube 29 and the sleeve 24 may be integrated or separated. The U-shaped tube 29 and the sleeve 24 may be fixed. For example, the U-shaped tube 29 is wrapped outside the sleeve 24, or the sleeve 24 is wrapped outside the U-shaped tube 29. There may also be a gap between the U-shaped tube 29 and the sleeve 24, and there is no fixed relationship between the two.

[0063] The first outer shell 13 and the second outer shell 14 are arranged along the thickness direction D of the temperature measuring device 100, which can facilitate the confirmation of the length of the first lower segment 213 and the second lower segment 223 after fusion splicing, and facilitate the arrangement of the first lower segment 213 and the second lower segment 223 along the edge of the receiving cavity 141 to prevent the first lower segment 213 and the second lower segment 223 from being damaged or squeezed in the receiving cavity 141; at the same time, it is convenient to process and form the convex block 144, which can better fix the wire rope 3 and prevent the wire rope 3 from shaking.

[0064] See Figures 12 to 13 , in one embodiment, the wire rope 3 is fixed to the outer shell 1, and an optical cable 2 without the wire rope 3 can be used, which can reduce costs.

[0065] In one embodiment, the wire rope 3 and the outer shell 1 are injection molded, which not only increases the stability but also saves the assembly process.

[0066] In one embodiment, the wire rope 3 includes a pair of connecting portions 33 arranged in parallel, and both ends of the hook portion 322 are respectively connected to the pair of connecting portions 33. [[ID=]

[24] ]

[0067] In one embodiment, the hook portion 322 is in a water droplet shape.

[0068] In one embodiment, the ends of the pair of connecting portions 33 are fixed by a fixing member 4. After the fixing member 4 is placed in the second groove 143 of the outer shell 1, it is injection molded with the outer shell 1. After injection molding, the fixing member 4 and a part of the pair of connecting portions are covered by plastic.

[0069] In one embodiment, the steel wire rope 3 is fixed to the second housing 14. In one embodiment, the steel wire rope 3 is injection-molded with the second housing 14.

[0070] In one embodiment, the first housing 13 is provided with a glue injection port 131 communicating with the accommodation cavity 141. After the first housing 13 and the second housing 14 are fixed, glue is injected into the accommodation cavity 141 through the glue injection port 131 to seal and fix the first lower segment 213 of the first optical fiber 21 and the second lower segment 223 of the second optical fiber 22.

[0071] Refer Figure 14 , the embodiment of the present application further provides a temperature measurement system 300, including a host (not shown) and a plurality of temperature measurement devices 100. The plurality of temperature measurement devices 100 are connected in series through a plurality of first upper segments 211 and a plurality of second upper segments 221. The first upper segment 211 or the second upper segment 221 of the two temperature measurement devices 100 located at both ends are respectively electrically connected to the host.

[0072] In one embodiment, the first upper segment 211 and the second upper segment 221 between the plurality of temperature measurement devices 100 are fixed by fiber fusion or fixed by flange connection. A protective sleeve can be provided at the fiber fusion position to increase strength.

[0073] The temperature measurement system 300 of the embodiment of the present application uses an optical fiber as a sensor. The optical fiber penetrates through the entire area to be monitored (such as a cable tray, the cable itself, a power distribution cabinet, etc.). The host emits a laser pulse to the optical cable 2, and by analyzing the light intensity information of the backscattered Raman scattered light, the temperature of each point on the entire optical cable 2 is demodulated to achieve continuous distributed temperature measurement.

[0074] The temperature measurement system 300 of the present application breaks through the loss problem of traditional cable temperature measurement, realizes high-precision temperature or environmental parameter acquisition, ensures long-distance and high-stability sensing performance, reduces signal transmission loss, improves the accuracy of measurement and the stability of the system, enhances the adaptability and intelligence of the system; realizes stable and efficient detection and management of the granary environment, improves management efficiency, and facilitates the operation and monitoring of the granary.

[0075] The core technical features of the temperature measurement system 300 of the present application include: The temperature measurement system 300 of the present application includes: Distributed: Instead of measuring several points, it measures continuously along the optical cable 2, and the number of measurement points can be thousands or tens of thousands.

[0076] Continuous real-time: Continuously scan the temperature of the entire monitoring area for 24 hours without interruption.

[0077] Precise positioning: Can accurately judge the position of the temperature anomaly point, and the accuracy is usually within 0.1 meter.

[0078] The temperature measuring device 100 of this application can be installed later. The number of temperature measuring devices 100 can be adjusted according to the size of the grain warehouse. The position of the temperature measuring device 100 can also be adjusted according to the required temperature measurement position. It is also convenient to replace the temperature measuring device 100, making it more flexible and convenient to use.

[0079] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A temperature measuring device, characterized in that, include: An outer shell that encloses a receiving cavity, the outer shell including an insertion portion and a top disposed opposite to the insertion portion; An optical cable includes a first optical fiber, a second optical fiber, and a middle protective sleeve. The first optical fiber includes a first upper section, a first middle section, and a first lower section. The second optical fiber includes a second upper section, a second middle section, and a second lower section. The first middle section and the second middle section are located inside the middle protective sleeve. The first upper section and the second upper section are located on a first side of the middle protective sleeve. The first lower section and the second lower section are located on a second side of the middle protective sleeve. The first side and the second side are opposite to each other. The first lower section and the second lower section are electrically connected and both are located inside the receiving cavity. At least a portion of the first upper section and at least a portion of the second upper section protrude from the top. A steel wire rope is fixed to at least one of the middle protective sleeve and the outer shell. The steel wire rope includes a hook, the end of which protrudes from the insertion part to abut against the lowering tool. The lowering tool carries the temperature measuring device down to the position where temperature measurement is required.

2. The temperature measuring device according to claim 1, characterized in that, The first lower segment and the second lower segment are arranged along the edge of the receiving cavity; and / or, The first lower segment and the second lower segment are fixed to the outer casing; and / or, The receiving cavity is elongated elliptical, and the radius of the semicircle at the end of the elongated ellipse is greater than or equal to 25 mm.

3. The temperature measuring device according to claim 1, characterized in that, The first lower segment and the second lower segment are fixed together by fiber splicing, and the optical cable includes a sleeve to cover the fiber splicing connection between the first lower segment and the second lower segment; or, The first lower section is fixedly connected to the second lower section flange.

4. The temperature measuring device according to claim 1, characterized in that, The top is provided with a first groove, one end of the middle protective sleeve is located in the first groove, and along the direction from the top to the insertion part, the middle protective sleeve abuts against the outer shell; and / or The insertion part is shaped like a pointed tip or a bullet.

5. The temperature measuring device according to claim 1, characterized in that, The outer casing includes a first outer casing and a second outer casing fixed to the first outer casing. The first outer casing and the second outer casing are arranged along the thickness direction of the temperature measuring device, and the first outer casing and the second outer casing form the receiving cavity; or... The outer casing includes a first outer casing and a second outer casing fixed to the first outer casing. The first outer casing and the second outer casing are arranged along the length direction of the temperature measuring device and form the receiving cavity. The temperature measuring device includes a U-shaped tube, which is sleeved at the bend after the first lower section and the second lower section are connected.

6. The temperature measuring device according to claim 1, characterized in that, The outer casing includes a protrusion extending into the receiving cavity, the protrusion being located at the center of the receiving cavity, and the protrusion having a groove to receive a portion of the wire rope.

7. The temperature measuring device according to any one of claims 1 to 6, characterized in that, The wire rope includes a fixed section fixed to the middle protective sleeve and an extension section connected to the fixed section. The extension section includes a main body section located within the receiving cavity, and the hook is connected to the main body section.

8. The temperature measuring device according to claim 7, characterized in that, The optical cable includes the steel wire rope, the fixed section is located inside the middle protective sleeve, and after the lower protective sleeve is removed, the first lower section, the second lower section and the extension section of the steel wire rope are exposed. And / or, The end of the extension is bent to form the hook. The temperature measuring device includes a fixing member to fix the free end of the hook to the main body section. The insertion part is provided with a second groove. The fixing member is located in the second groove. Along the direction from the top to the insertion part, the fixing member abuts against the outer shell.

9. The temperature measuring device according to any one of claims 1 to 5, characterized in that, The steel wire rope and the outer shell are injection molded together.

10. A temperature measurement system, characterized in that, The device includes a host and multiple temperature measuring devices as described in any one of claims 1 to 9. The multiple temperature measuring devices are connected in series through multiple first upper sections and multiple second upper sections. The first upper section or the second upper section of the two temperature measuring devices located at both ends is electrically connected to the host.

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