Strain sensor with temperature synchronous monitoring function and temperature and strain separation method

Abstract

The invention provides a strain sensor with a temperature synchronous monitoring function and a temperature and strain separation method, and aims at overcoming the defects of a traditional strain sensor in long-term monitoring of ships and ocean structures. According to the sensor structure, the two elastic bodies which are in mirror symmetry and separated from each other work cooperatively and cooperate with the vertical mounting base, the strain gauge, the upper and lower cover plates, the temperature sensor and the like, strain and temperature can be monitored synchronously, the structure is compact and reasonable, and the measurement accuracy is high; and the temperature adaptability and the reliability are improved through different designs (for example, a gap is reserved between an elastic body on one side and a cover plate, and a silica gel sealing layer is arranged). Meanwhile, a temperature strain separation method is provided, the sensor is calibrated by simulating different temperature environments in the temperature control box, then data are recorded in actual working conditions, temperature strain is separated through comparison calculation, strain acting force corresponding to non-temperature strain is obtained, and an important basis is provided for analyzing the stress condition and the safety state of the structure.

Description

Technical Field

[0001] This invention relates to the field of ship strain monitoring technology, and in particular to a strain sensor with synchronous temperature monitoring and a method for separating temperature and strain. Background Technology

[0002] During long-term service, ships and marine structures are subjected to the coupled effects of ocean waves and temperature loads, causing corresponding deformations. These deformations can be measured by strain sensors, allowing analysis of the structure's safety status and providing a basis for optimized structural design. Currently, strain sensors in long-term monitoring systems for ships and marine structures often only monitor the structure's strain.

[0003] For example, Chinese patent ZL201110094786.4 discloses a strain sensor structure and installation method. The invention includes a cylinder (21) made of the same material as the lower cover plate (11) with an opening in the middle of the elastic body. This cylinder (21) is not connected to the elastic body (3), thus not affecting the deformation state of the elastic body (3). The lower end of the cylinder (21) is open and fixed to the lower cover plate (11). The top of the cylinder (21) is closed, and a spring (22) is installed inside it. The lower end of the spring (22) is connected to a temperature sensing probe (20). The probe directly contacts the surface of the measuring point through the opening in the lower cover plate (11). The tightness of the spring (22) inside the cylinder (21) ensures that the probe (20) and the measuring point of the structure being measured remain in contact. The temperature sensing signal and the strain sensing signal are simultaneously output through the sensor's lead-in port, enabling one sensor to simultaneously measure two parameters.

[0004] However, during their navigation and service at sea, ships and marine structures are subjected to varying atmospheric temperatures at different times of the day. In some sea areas, the deck temperature under direct sunlight can reach 60-80°C during the day, and this temperature difference compared to nighttime temperatures can lead to significant temperature stress cycles in localized structures. Traditional long-term structural strain monitoring sensors can only monitor structural strain data, often using atmospheric / cabin temperature as the corresponding data. They lack accurate temperature monitoring methods for each measuring point, making it impossible to accurately determine whether the strain component at the measuring point originates from wave loads or temperature loads. This poses a challenge to optimizing load-related structural components in structural design. Therefore, there is an urgent need to design a sensor probe that simultaneously monitors strain and temperature at measuring points, building upon existing technology, and to solve the problem of separating non-temperature strain from the total strain.

[0005] To address this, we propose a strain sensor with synchronous temperature monitoring and a method for separating temperature and strain. Summary of the Invention

[0006] Therefore, it is necessary to address the technical problem that traditional strain sensors in long-term monitoring systems for ships and marine structures can only monitor structural strain data and cannot accurately determine whether the strain component originates from wave loads or temperature loads, which poses a challenge to optimizing the structural parts related to each load in structural design. This requires providing a strain sensor with synchronous temperature monitoring and a temperature-strain separation method. This enables simultaneous monitoring of strain and temperature at the measuring point and the separation of non-temperature strain from the total strain, providing more accurate and comprehensive data support for the safety assessment and structural optimization design of ships and marine structures.

[0007] A first aspect of the present invention provides a strain sensor with synchronous temperature monitoring, comprising two elastic bodies arranged in a mirror-symmetrical manner, the two elastic bodies being spaced apart from each other; two vertical mounting bases connected to opposite sidewalls of the two elastic bodies, with a common measured structure fixedly connected below the two vertical mounting bases; a strain gauge fixedly connected between the two elastic bodies; an upper cover plate connected to the upper ends of the two elastic bodies and covering the top of the strain gauge; and a lower cover plate connected to the lower ends of the two elastic bodies and covering the bottom of the strain gauge; wherein, the strain gauge has a reserved cavity in the middle opening to the measured structure, and a downward-opening connecting sleeve is provided in the reserved cavity. An internal temperature sensor is installed along the axial direction of the connecting sleeve. The temperature sensor is connected to the top wall of the connecting sleeve axially via a spring, and passes through the lower end cover to contact the structure under test. The sensor has a compact and reasonable structure. Through the coordinated work of two mirror-symmetrical and spaced elastic bodies, it can accurately transmit strain. A vertical mounting base connects the elastic body and the structure under test, ensuring positional stability. The strain gauge directly senses the deformation of the elastic body, improving measurement sensitivity and accuracy. The upper and lower cover plates protect the strain gauge. A reserved cavity provides installation space for the temperature sensor. The temperature sensor is in good contact with the structure under test through an elastic connection, and can simultaneously monitor strain and temperature, providing comprehensive data for subsequent analysis of structural stress.

[0008] In other embodiments, one side of the elastomer is fixedly connected to the upper and lower cover plates, while the other side of the elastomer has a gap between it and the upper and lower cover plates. The fixed connection on one side ensures the basic structure and stability of the sensor, while the gap on the other side provides space for the deformation of the elastomer, reduces thermal stress, improves the temperature adaptability of the sensor, and enables it to work normally under different temperature conditions, thereby improving measurement accuracy.

[0009] In other embodiments, both the upper and lower ends of the strain gauge are connected to silicone sealing layers, and the lower silicone sealing layer has a through hole for the connecting sleeve to pass through. The silicone sealing layer can prevent moisture, dust and other impurities from entering the strain gauge and protect its normal operation. The through hole in the lower silicone sealing layer ensures that the connecting sleeve can pass through while maintaining the sealing effect, extending the service life of the strain gauge and improving the reliability of the sensor.

[0010] In other embodiments, the end of the temperature sensor facing the structure being measured is arc-shaped. (The arc-shaped design increases the contact area with the structure being measured, improves the accuracy of temperature measurement, reduces friction, avoids damage to the structure being measured, and can also adapt to the surface of structures of different shapes, meeting the temperature monitoring needs of complex-shaped structures.)

[0011] In other embodiments, the vertical mounting base is made of metal and has a liquid cooling channel inside. The metal vertical mounting base has high strength and rigidity, can withstand large external forces, ensures a firm and reliable connection, and facilitates stress transmission. The liquid cooling channel can remove heat, reduce the temperature of the vertical mounting base, and avoid the impact of thermal expansion and contraction on strain transmission. At the same time, stress analysis is required to avoid affecting stress transmission.

[0012] In other embodiments, the elastomer is a carbon fiber-epoxy resin composite material, a thermoplastic polyamide elastomer, or a thermoplastic elastomer. The carbon fiber-epoxy resin composite material has high strength, high modulus, and corrosion resistance, and can accurately transmit strain with small deformation. Thermoplastic polyamide elastomers and thermoplastic elastomers have good elasticity and flexibility, and stable performance over a wide temperature range, avoiding excessive temperature strain errors due to material properties. Furthermore, because elastomers are elastic, they are not suitable for setting up liquid cooling channels.

[0013] In other embodiments, the vertical mounting base is welded to the structure under test, and the vertical mounting base is fixed to the elastomer by screws. Welding ensures the connection strength between the vertical mounting base and the structure under test, improves stress transmission efficiency, and makes the sensor firmly installed. Screw connection facilitates sensor assembly, disassembly, maintenance, and component replacement, improves maintainability, reduces maintenance costs, and ensures the continuity of monitoring work.

[0014] A second aspect of the present invention provides a temperature strain separation method, which uses the aforementioned strain sensor with synchronous temperature monitoring, and includes the following steps: A strain sensor with synchronous temperature monitoring is installed in the temperature control box; Multiple wire harnesses are installed inside the temperature control box and suspended on the top cover, while keeping the top cover horizontal. After the strain sensor data stabilizes, the temperature is adjusted sequentially in the temperature control chamber, and the strain data at different temperatures are calibrated. Install a strain sensor with synchronous temperature monitoring on the structure being tested; The actual strain data of the structure under test under actual temperature changes are recorded by a strain sensor with synchronous temperature monitoring. The strain force after separating temperature strain is obtained by subtracting the strain data in the temperature control chamber from the actual strain data at the same temperature. This method calibrates the sensor by simulating different temperature environments in the temperature control chamber to obtain the relationship curve between strain data and temperature. Then, the strain and temperature data are recorded in the actual working conditions to obtain the actual relationship curve. By comparing and calculating, the temperature strain is separated, thereby accurately obtaining the strain force corresponding to non-temperature strain, providing an important basis for analyzing the stress condition and safety status of the structure.

[0015] In other embodiments, step S3 further includes obtaining the relationship curve between strain data and temperature in the temperature control chamber. Step S5 further includes obtaining strain data and temperature variation curves under actual working conditions. Where t is temperature. Obtaining these two curves from the strain data is crucial for the temperature-strain separation method. The strain of the sensor changes with temperature within the temperature control chamber, which reflects the sensor's performance indicators. It reflects the strain and temperature change patterns under actual working conditions. By comparing the two curves, the influence of factors other than temperature on strain under actual working conditions can be analyzed, thereby improving the accuracy and reliability of monitoring data.

[0016] In other embodiments, in S6, at temperature At that time, the relationship curve between strain data and temperature change in the temperature control chamber is as follows: The relationship between strain data and temperature changes under actual working conditions. ,at this time =The strain value after temperature separation from the total strain. This step further clarifies the calculation method of temperature strain separation. By comparing the data from two curves at a specific temperature point, the strain value after temperature separation is accurately calculated, improving the accuracy of temperature strain separation and providing more reliable data support for structural safety assessment. It is of great significance for analyzing structural stress and fatigue damage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 for Figure 1 A sectional view along line A.

[0019] Figure 3 This is the relationship curve between temperature and strain in this invention.

[0020] Figure 4 This is a flowchart of the operation in this invention.

[0021] in: 1. Vertical mounting base; 101. Liquid cooling channel; 2. Side mounting hole; 3. Elastomer; 4. Top cover plate; 5. Strain gauge; 501. Reserved cavity; 6. Silicone sealing layer; 7. Connecting sleeve; 8. Spring; 9. Temperature sensor; 10. Through hole; 11. Bottom cover plate; 12. Structure under test. Detailed Implementation

[0022] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0023] Example 1 like Figure 1 - Figure 2 As shown, this embodiment discloses a strain sensor with synchronous temperature monitoring, including an elastic body 3, a vertical mounting base 1, a strain gauge 5, and a temperature sensor 9 disposed in the strain gauge 5, which can simultaneously monitor stress data containing temperature changes.

[0024] Specifically, in this embodiment, the elastic body 3 consists of two mirror-symmetrically distributed elastic bodies 3, spaced apart from each other. This mirror-symmetrical and spaced-apart distribution ensures that when subjected to external forces, the two elastic bodies 3 can work together to jointly transmit strain. Simultaneously, the spaced-apart design provides sufficient space for subsequent installation of other components and the implementation of functions such as temperature monitoring. In practical applications, this layout helps improve the overall stability and reliability of the sensor, reducing measurement errors caused by uneven local stress. For example, when the measured structure 12 deforms, the two elastic bodies 3 can uniformly sense the strain, making the measurement results more accurate and reliable.

[0025] In this embodiment, two vertical mounting bases 1 are connected to the opposite sidewalls of two elastic bodies 3, and the same measured structure 12 is fixedly connected below the two vertical mounting bases 1. The vertical mounting bases 1 play a crucial role in connecting the elastic bodies 3 and the measured structure 12. By fixing the vertical mounting bases 1 to the measured structure 12, the relative position between the elastic bodies 3 and the measured structure 12 can be kept stable, thereby accurately transmitting strain. In actual ship and marine structure monitoring, the measured structure 12 may be subjected to complex coupling effects of ocean waves and temperature loads, resulting in deformation in various directions. The reasonable design of the vertical mounting bases 1 can ensure that the sensor can still work stably under these complex working conditions and accurately acquire strain data.

[0026] In this embodiment, the strain gauge 5 is fixedly connected between two elastic bodies 3. The strain gauge 5 can sense the strain transmitted from the elastic bodies 3 and convert it into an electrical signal for output. Fixing the strain gauge 5 between the two elastic bodies 3 allows it to directly contact the elastic bodies 3, enabling more accurate sensing of the deformation of the elastic bodies 3. This installation method improves the sensitivity and accuracy of the measurement, allowing the sensor to detect minute strain changes. In the long-term monitoring of ships and marine structures, minute strain changes may indicate potential structural safety hazards; therefore, accurately measuring these changes is crucial for ensuring structural safety.

[0027] In this embodiment, the top cover plate 4 is connected to the upper ends of the two elastic bodies 3 and covers the top of the strain gauge 5. The main function of the top cover plate 4 is to protect the strain gauge 5 from interference and damage from the external environment. In the marine environment, there are various harsh factors, such as seawater corrosion and marine organism attachment. The top cover plate 4 can effectively isolate these factors and extend the service life of the strain gauge 5. At the same time, the top cover plate 4 can also play a certain sealing role, preventing moisture and other impurities from entering the sensor and affecting its normal operation. In addition, the design of the top cover plate 4 can also take into account its strength and rigidity to ensure that it will not deform under external force, thereby ensuring the measurement accuracy of the sensor.

[0028] The lower end cap 11, connected to the lower ends of the two elastic bodies 3 and covering the bottom of the strain gauge 5, similar to the upper cover plate 4, also serves to protect the strain gauge 5. It prevents the bottom of the strain gauge 5 from impacts and abrasions from external objects, further ensuring the safety of the strain gauge 5. Furthermore, the lower end cap 11 can cooperate with other components to form a relatively enclosed space, providing a good environment for the installation and normal operation of the temperature sensor 9. In the monitoring of ships and marine structures, the design of the lower end cap 11 needs to consider its waterproof and corrosion-resistant properties to adapt to the harsh marine environment.

[0029] In this embodiment, the strain gauge 5 has a reserved cavity 501 in its middle, opening towards the structure 12 being measured. The cavity 501 provides strain space for the strain gauge 5 to facilitate deformation and also reduces weight. In this embodiment, a downward-opening connecting sleeve 7 is installed within the cavity 501. A temperature sensor 9 is installed within the connecting sleeve 7, positioned axially along its axis. The temperature sensor 9 is connected to the top wall of the connecting sleeve 7 via a spring 8, and passes through the lower end cover 11 to contact the structure 12 being measured. This design cleverly integrates temperature monitoring into the strain sensor. The reserved cavity 501 provides space for the installation of the temperature sensor 9, while the connecting sleeve 7 serves to fix and protect it. The elastic connection between the temperature sensor 9 and the top wall of the connecting sleeve 7 via the spring 8 ensures that the temperature sensor 9 maintains good contact with the structure 12 being measured, accurately measuring its temperature. Furthermore, the spring 8 also acts as a buffer, reducing the impact of external vibrations on the temperature sensor 9 and improving the stability of temperature measurement. In long-term monitoring of ships and marine structures, temperature changes have a significant impact on structural strain. By designing a system that simultaneously monitors temperature and strain, the stress on the structure can be analyzed more accurately, providing more comprehensive data support for structural safety assessment.

[0030] In this embodiment, one side of the elastic body 3 is fixedly connected to the upper and lower cover plates (4, 11), while a gap is left between the other side of the elastic body 3 and the upper and lower cover plates (4, 11). The fixed connection of one side of the elastic body 3 to the upper and lower cover plates (4, 11) ensures the basic structure and stability of the sensor, while the gap between the other side of the elastic body 3 and the upper and lower cover plates (4, 11) provides space for the deformation of the elastic body 3. When the measured structure 12 deforms, the elastic body 3 can deform freely within the gap range, thereby transmitting strain more accurately. Simultaneously, this design can reduce the thermal stress between the elastic body 3 and the upper and lower cover plates (4, 11) caused by temperature changes, improving the sensor's temperature adaptability. In ship and marine environments, where temperature variations are significant, this design ensures that the sensor can operate normally under different temperature conditions, improving measurement accuracy.

[0031] In this embodiment, both the upper and lower ends of the strain gauge 5 are connected to silicone sealing layers 6, and the lower silicone sealing layer 6 has a through hole 10 for the connecting sleeve 7 to pass through. The silicone sealing layer 6 provides a good seal, preventing moisture, dust, and other impurities from entering the strain gauge 5 and protecting its normal operation. Silicone material has good flexibility and sealing properties, adapting to the deformation of the elastomer 3 without breaking due to deformation. The through hole 10 in the lower silicone sealing layer 6 allows the connecting sleeve 7 to pass through smoothly while ensuring a good seal. This sealing design is crucial for strain sensors used in harsh marine environments, extending the lifespan of the strain gauge 5 and improving sensor reliability.

[0032] In this embodiment, the end of the temperature sensor 9 facing the measured structure 12 is arc-shaped. This arc-shaped design increases the contact area with the measured structure 12, improving the accuracy of temperature measurement. The arc-shaped design also reduces friction between the temperature sensor 9 and the measured structure 12, preventing damage during measurement. Furthermore, this design allows the temperature sensor 9 to better adapt to the surface shape of the measured structure 12, ensuring good contact regardless of whether the surface is flat or curved, thus improving the accuracy of temperature measurement. In the monitoring of ships and marine structures, the surface shape of the measured structure 12 may be complex; this design can meet the temperature monitoring needs of structures with different shapes.

[0033] In this embodiment, the vertical mounting base 1 is made of metal, and a liquid cooling channel 101 is provided inside the vertical mounting base 1. The metal vertical mounting base 1 has high strength and rigidity, and can withstand large external forces, ensuring a firm and reliable connection between the sensor and the measured structure 12, facilitating stress transmission. At the same time, the liquid cooling channel 101 can carry away the heat inside the vertical mounting base 1 through the circulating coolant, reducing the temperature of the vertical mounting base 1 and preventing thermal expansion and contraction deformation of the vertical mounting base 1 at high temperatures from affecting strain transmission. In addition, since the vertical mounting base 1 has a liquid cooling channel 101 inside, stress analysis needs to be performed on it before actual use to avoid the liquid cooling channel 101 affecting stress transmission.

[0034] In this embodiment, the elastomer 3 is a carbon fiber-epoxy resin composite material, a thermoplastic polyamide elastomer, or a thermoplastic elastomer. Carbon fiber-epoxy resin composite materials possess advantages such as high strength, high modulus, and corrosion resistance, enabling them to maintain good performance in complex marine environments. Their high strength and high modulus allow the elastomer 3 to accurately transmit strain under strain, while exhibiting minimal deformation, ensuring measurement accuracy. Thermoplastic polyamide elastomers and thermoplastic elastomers also possess good elasticity and flexibility, maintaining stable performance over a wide temperature range. This means that their temperature strain is less affected by excessively high temperatures, avoiding excessive temperature strain errors caused by the material of the elastomer 3 itself.

[0035] Meanwhile, since the elastomer 3 itself has a certain degree of elasticity, it is not convenient to add a liquid cooling channel 101 inside like the vertical mounting base 1, as this would affect the transmission of strain.

[0036] In this embodiment, the vertical mounting base 1 is welded and fixed to the structure under test 12. A side mounting hole 2 is provided on the side of the vertical mounting base 1 near the elastic body 3, and a corresponding mating hole is provided on the elastic body 3. The side mounting hole 2 and the mating hole are fixed by screws. Welding ensures the connection strength between the vertical mounting base 1 and the structure under test 12, allowing the sensor to be firmly installed on the structure under test 12 and facilitating strain transmission. The screw fixing of the vertical mounting base 1 to the elastic body 3 facilitates the assembly and disassembly of the sensor, allows for effective connection between two structures of different hardness, and facilitates maintenance or component replacement. The vertical mounting base 1 and the elastic body 3 can be separated by unscrewing the screws for appropriate operations. This detachable connection method improves the maintainability of the sensor and reduces maintenance costs. In long-term monitoring of ships and marine structures, sensors may malfunction for various reasons. This connection method allows for convenient and quick maintenance and replacement, ensuring the continuity of monitoring work.

[0037] Example 2 like Figure 3 - Figure 4 As shown, this embodiment discloses a temperature-strain separation method, which uses a strain sensor with synchronous temperature monitoring as described in Embodiment 1, and includes the following steps: S1. A strain sensor with synchronous temperature monitoring is placed in a temperature-controlled chamber. This chamber simulates different temperature environments for sensor calibration. The temperature-controlled chamber precisely controls the range and rate of temperature change, providing a stable and controllable environment for sensor calibration. Temperature is a crucial factor in the monitoring of ships and marine structures. Calibration in a temperature-controlled chamber allows for accurate understanding of sensor performance changes at different temperatures, providing fundamental data for accurate strain measurement and temperature-strain separation in actual operating conditions. For example, the calibration process can simulate the temperature conditions a ship might encounter in different sea areas and at different times, enabling the sensor to better adapt to various temperature conditions in practical applications.

[0038] S2. Install multiple wiring harnesses inside the temperature control chamber and suspend them on the upper cover plate 4, ensuring the upper cover plate 4 remains horizontal. Installing multiple wiring harnesses and suspending them on the upper cover plate 4 avoids the strain sensor with synchronous temperature monitoring being affected by other forces. If only the wiring harnesses are used for suspension and placed inside the temperature control chamber, the sensor is only subject to the suspension force of the harnesses, avoiding interference from other forces. Furthermore, after removing the influence of the suspension force, temperature-strain data free from other interference factors can be obtained.

[0039] S3. After the strain sensor data stabilizes, the temperature is adjusted sequentially within the temperature-controlled chamber, and the strain data at different temperatures is calibrated. Waiting for the strain sensor data to stabilize ensures that the sensor has adapted to the strain changes during hoisting and the environment within the temperature-controlled chamber, and that the measurement results are accurate and reliable. After the data stabilizes, the temperature of the temperature-controlled chamber is adjusted sequentially to simulate the temperature change process, recording the sensor's output strain data at different temperatures. In this way, the strain-temperature relationship curve of the sensor at different temperatures can be obtained, providing a basis for subsequent temperature-strain separation. In actual ship and marine structure monitoring, temperature is constantly changing; understanding the performance changes of the sensor at different temperatures is crucial for accurately analyzing the stress conditions of the structure.

[0040] like Figure 3 As shown, this embodiment also includes obtaining the relationship curve between strain data and temperature change in the temperature control chamber. The relationship between strain data and temperature was obtained. This is key to the temperature-strain separation method. This curve reflects the strain of the sensor within the temperature-controlled chamber as a function of temperature. By analyzing this curve, we can understand the sensor's performance indicators such as sensitivity and linearity at different temperatures. In practical applications, when the current temperature is known, the temperature-induced strain component can be estimated based on this curve.

[0041] S4. Install the strain sensor with synchronous temperature monitoring onto the structure under test 12. Install the calibrated strain sensor onto the structure under test 12 to begin actual monitoring. During installation, ensure the sensor is accurately and securely positioned, with good contact with the structure under test 12, to guarantee accurate measurement of strain and temperature. In actual ship and marine structure monitoring, the selection of the installation location is crucial. Different locations may experience different loads and temperature effects; therefore, a suitable installation location must be selected based on the monitoring objective and structural characteristics. Furthermore, for stress concentration areas of the monitored structure, the sensor should be installed in the stress concentration area to accurately obtain strain and temperature changes at that location, providing reliable data for structural safety assessment.

[0042] S5. The strain data of the tested structure 12 under actual temperature changes is recorded by a strain sensor with synchronous temperature monitoring. In actual working conditions, the tested structure 12 is subjected to the coupling effects of various loads such as ocean waves and temperature, resulting in complex deformation. The strain sensor can record the strain data caused by these deformations in real time, while the temperature sensor 9 also records the corresponding temperature data. These actual strain data contain both temperature strain and non-temperature strain components. By comparing and analyzing the data calibrated in the temperature control chamber, a basis can be provided for subsequent temperature strain separation. In actual ship and marine structure monitoring, real-time recording of strain data can promptly grasp the stress changes of the structure and discover potential safety hazards. For example, if the actual strain data suddenly increases, it may indicate that the structure has been subjected to a large external force or has been damaged, requiring timely further analysis and treatment.

[0043] In this embodiment, the method also includes obtaining strain data and temperature variation curves under actual working conditions. The strain data and temperature variation curves under actual working conditions were obtained. This is to provide a more intuitive understanding of the changes in strain and temperature in a real-world environment. This curve is compared to the curve obtained in the temperature control chamber. The two curves differ in that they reflect the influence of various complex factors on the sensor measurement results under actual working conditions. By comparing these two curves, the degree of influence of factors other than temperature on strain under actual working conditions can be analyzed. For example, if the two curves show significant differences in certain temperature ranges, it indicates that other factors in actual working conditions cause additional changes in strain. These factors may be ocean wave loads, structural vibrations, etc. By analyzing these differences, temperature strain and non-temperature strain can be separated more accurately, improving the accuracy and reliability of monitoring data. Here, t represents temperature. For strain data.

[0044] S6. Subtract the strain data from the strain data in the temperature control chamber from the actual strain data at the same temperature to obtain the strain force after separating the temperature strain. By subtracting the strain data at the corresponding temperature obtained from calibration in the temperature control chamber from the actual strain data at the same temperature, the strain component caused by temperature can be roughly separated, thus obtaining the strain force corresponding to the non-temperature strain. In actual ship and marine structure monitoring, non-temperature strain is mainly caused by ocean wave loads, etc. Accurately separating non-temperature strain is crucial for analyzing the stress condition and safety status of the structure. For example, through the separated non-temperature strain data, the stress level of the structure under wave loads can be calculated, the strength and stability of the structure can be evaluated, and important basis can be provided for structural design optimization and safety assessment.

[0045] In this embodiment, at a temperature of At that time, the relationship curve between strain data and temperature change in the temperature control chamber is as follows: The relationship between strain data and temperature changes under actual working conditions. ,at this time The step of separating the temperature-dependent strain from the total strain further clarifies the calculation method for temperature-strain separation. This is achieved by comparing the strain data from the temperature control chamber at specific temperature points. Strain data in actual working conditions The difference between the two values ​​represents the strain value after temperature separation. This precise calculation method improves the accuracy of temperature-strain separation, providing more reliable data support for subsequent structural safety assessments. In actual ship and marine structure monitoring, accurate strain values ​​are crucial for analyzing structural stress and fatigue damage.

[0046] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A strain sensor with synchronous temperature monitoring, characterized in that, include: The elastomers are two in number and are distributed in a mirror-symmetric manner, with the two elastomers spaced apart from each other; Two vertical mounting bases are connected to the opposite sidewalls of two elastic bodies, and the same structure under test is fixedly connected to the bottom of the two vertical mounting bases. A strain gauge, which is fixedly connected between two elastic bodies; The top cover plate connects to the upper ends of the two elastomers and covers the top of the strain gauge; The lower end cap connects to the lower ends of the two elastomers and covers the bottom of the strain gauge; The strain gauge has a reserved cavity in the middle that opens to the structure being measured, and a connecting sleeve with a downward opening is provided in the reserved cavity. A temperature sensor is provided in the connecting sleeve along the axial direction of the connecting sleeve. The temperature sensor is connected to the top wall of the connecting sleeve along the axial direction by a spring, and the temperature sensor passes through the lower end cover and contacts the structure being measured.

2. A strain sensor with synchronous temperature monitoring as described in claim 1, characterized in that: One side of the elastomer is fixed to the upper and lower cover plates, while the other side of the elastomer has a gap between it and the upper and lower cover plates.

3. A strain sensor with synchronous temperature monitoring as described in claim 1, characterized in that: Both ends of the strain gauge are connected to silicone sealing layers, and the lower silicone sealing layer has a through hole for the connecting sleeve to pass through.

4. A strain sensor with synchronous temperature monitoring as described in claim 1, characterized in that: The end of the temperature sensor facing the structure being measured is arc-shaped.

5. A strain sensor with synchronous temperature monitoring as described in claim 1, characterized in that: The vertical mounting base is made of metal, and a liquid cooling channel is provided inside the vertical mounting base.

6. A strain sensor with synchronous temperature monitoring as described in claim 1, characterized in that: The elastomer is a carbon fiber-epoxy resin composite material, a thermoplastic polyamide elastomer, or a thermoplastic elastomer.

7. A strain sensor with synchronous temperature monitoring as described in claim 1, characterized in that: The vertical mounting base is welded and fixed to the structure under test, and the vertical mounting base is fixed to the elastomer by screws.

8. A temperature strain separation method, which uses a strain sensor with synchronous temperature monitoring as described in any one of claims 1-7, characterized in that: Includes the following steps: S1. Install a strain sensor with synchronous temperature monitoring in the temperature control box; S2. Install multiple wire harnesses inside the temperature control box and suspend them on the upper cover plate, and keep the upper cover plate horizontal; S3. After the strain sensor data stabilizes, adjust the temperature sequentially in the temperature control chamber and calibrate the strain data at different temperatures. S4. Install the strain sensor with synchronous temperature monitoring onto the structure under test; S5. Record the actual strain data of the structure under test under actual temperature changes using a strain sensor with synchronous temperature monitoring. S6. Subtract the strain data in the temperature control chamber from the actual strain data at the same temperature to obtain the strain force after separating the temperature strain.

9. The temperature strain separation method as described in claim 8, characterized in that: Step S3 also includes obtaining the relationship curve between strain data and temperature in the temperature control chamber. ; Step S5 also includes obtaining strain data and temperature change curves under actual working conditions. Where t is temperature. For strain data.

10. The temperature strain separation method as described in claim 9, characterized in that: In S6, at temperature At that time, the relationship curve between strain data and temperature change in the temperature control chamber is as follows: The relationship between strain data and temperature changes under actual working conditions. ,at this time =The strain value after separating temperature from the total strain.

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