Large-volume fan foundation concrete intelligent temperature measurement system and application method

Abstract

An intelligent temperature measurement system for large-volume fan foundation concrete comprises a sensing module, a data acquisition and transmission module, a power supply module and an intelligent control module, and the sensing module is arranged in the fan foundation concrete; the sensing module is in optical signal connection with the data acquisition and transmission module; the data acquisition and transmission module is wirelessly connected with the intelligent control module; the distributed optical fiber sensing technology is adopted, continuous monitoring of the temperature field in the large-volume concrete of the fan foundation is achieved, the measurement precision is high, and the spatial resolution is high; the environment adaptability is high, stable operation in a complex environment of a wind power generation project can be realized, the anti-electromagnetic interference capability is high, and the service life is long; power supply is stable and reliable, power supply of the device in the long-term monitoring process is guaranteed, and maintenance cost and manual intervention are reduced; the intelligent degree is high, and the functions of automatic early warning, remote management, data sharing and the like are achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wind power generation, and particularly relates to a large-volume wind turbine foundation concrete intelligent temperature measurement system and an application method. BACKGROUND

[0002] In the construction of wind power generation projects, the wind turbine foundation, as the core structure for bearing the wind turbine generator set, is usually formed by pouring large-volume concrete. During the hardening process of the large-volume concrete, a large amount of heat is released due to the hydration of cement, resulting in a sharp rise in the internal temperature of the concrete and a relatively low surface temperature, thereby forming a large internal-external temperature difference. This temperature difference can cause temperature stress in the internal concrete, and when the stress exceeds the tensile strength of the concrete, cracks will appear. Once the wind turbine foundation has cracks, not only will the integrity and load-bearing capacity of the structure be affected, but also rainwater, moisture and the like can enter, accelerate the corrosion of the steel bars, shorten the service life of the wind turbine foundation, and in severe cases, even cause the wind turbine to collapse and other major safety accidents. Therefore, accurate monitoring of the temperature of the large-volume concrete of the wind turbine foundation, timely grasping of the temperature variation law, and taking effective temperature control measures are key links to ensure the construction quality of the wind turbine foundation. In the prior art, the temperature measurement methods for large-volume concrete mainly adopt the traditional methods of manually pre-embedded temperature measurement lines or thermocouples. However, this method has many shortcomings: first, the cost of manual operation is high, and it is time-consuming and laborious to read data regularly; second, the number of measurement points is limited, and it is difficult to fully reflect the temperature field distribution in the internal concrete, which may have temperature monitoring blind spots; third, the data acquisition is not timely, and it is difficult to grasp the temperature variation in real time, so it is difficult to take timely measures when the temperature is abnormal; fourth, the accuracy of the traditional temperature measurement equipment is easily affected by environmental factors, resulting in a decrease in the accuracy of the measurement data. At present, in the field of large-volume concrete temperature monitoring, some temperature measurement methods and devices have appeared, but in the monitoring of the wind turbine foundation of wind power generation projects, there are still many inadaptabilities, and an intelligent temperature measurement device specifically for this scenario is urgently needed. SUMMARY

[0003] The present application aims to solve the problems existing in the prior art, and provides an intelligent temperature measurement device for large-volume concrete, which realizes real-time, comprehensive and accurate monitoring of the temperature of large-volume concrete, reduces labor costs, improves temperature control efficiency, and ensures the construction quality of the foundation of wind power generation equipment.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows: An intelligent temperature measurement system for large-volume wind turbine foundation concrete, comprising a sensing module, a data acquisition and transmission module, a power supply module and an intelligent control module, characterized in that: the sensing module is arranged in the internal concrete of the wind turbine foundation; the sensing module and the data acquisition and transmission module are connected by optical signals; and the data acquisition and transmission module and the intelligent control module are connected in a wireless manner. An application method of an intelligent temperature measurement system for large-volume fan foundation concrete, characterized by: include: S1. Scheme Design: Before concrete pouring, the sensing optical fiber is fixed on the steel reinforcement frame according to the design scheme. The sensing optical fiber is laid out along the steel reinforcement frame in both horizontal and vertical directions. Sufficient length is reserved at the connection end of the optical fiber to connect with the optical path interface of the data acquisition unit. S2. Equipment Installation and Debugging: Within 24 hours after the concrete pouring is completed, install the data acquisition and transmission module, power supply equipment and intelligent control module, install the solar panels in a well-lit location around the foundation, and connect the lithium battery to the solar panels; perform equipment debugging, check whether the sensing fiber is unobstructed, whether the data acquisition unit can accurately collect temperature data, whether the transmission unit can transmit data stably, and whether the early warning and linkage functions of the intelligent control module are normal. S3. Operation monitoring: After the device is officially put into operation, the temperature change curve inside the concrete and the temperature data of each monitoring point can be viewed remotely in real time; when the temperature exceeds the preset threshold, the device will automatically issue an audible and visual alarm and remind the staff through remote push. S4. Data Processing and Analysis: Regularly acquire temperature data from the device's local storage and remote management platform, utilize the device's multi-dimensional data analysis functions to generate temperature gradient maps and trend maps, assess the temperature stress of the concrete, and provide a reference for subsequent maintenance work.

[0005] Compared with the prior art, the present invention has the following beneficial effects: 1. Accurate and comprehensive measurement: Utilizing distributed fiber optic sensing technology, continuous monitoring of the internal temperature field of the large-volume concrete of the wind turbine foundation is achieved. The measurement is highly accurate and has high spatial resolution, comprehensively reflecting the temperature changes inside the concrete and overcoming the limitations of traditional temperature measurement methods. 2. Strong environmental adaptability: The device is made of corrosion-resistant and high-temperature resistant materials, with a reasonable outer shell and protective structure design, a high protection level, and can operate stably in the complex environment of wind power generation projects. It has strong anti-electromagnetic interference capabilities and a long service life. 3. Stable and reliable power supply: The combination of solar energy and lithium battery power supply makes full use of natural resources, ensures the power supply of the device during long-term monitoring, and reduces maintenance costs and manual intervention. 4. High level of intelligence: It has functions such as automatic early warning, remote management and data sharing, which can detect temperature anomalies in a timely manner and take corresponding measures, improving the efficiency and accuracy of temperature control and ensuring the construction quality of large-volume concrete for wind turbine foundations. 5. Significant cost-effectiveness: Although the initial investment in the equipment is relatively high, its long service life and low maintenance costs make it more cost-effective in the long run. At the same time, it effectively avoids engineering quality problems caused by improper temperature control, reducing economic losses and safety hazards. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the system composition; Figure 2 This is a schematic diagram of the data acquisition and transmission module. Among them: 1-sensing optical fiber, 2-data acquisition and transmission module, 21-optical path interface, 22-photodetector, 23-signal processor, 24-transmission unit, 3-intelligent control module, 4-wind turbine foundation concrete. Detailed Implementation

[0007] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0008] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is described as "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is described as "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," "top," "bottom," and similar expressions used in this document are for illustrative purposes only.

[0009] This invention discloses an intelligent temperature measurement system for large-volume concrete, which consists of a sensing module, a data acquisition and transmission module, a power supply module, a shell and protective structure, and an intelligent control module. The modules work together to achieve accurate and intelligent monitoring of the temperature of large-volume concrete. The sensing module employs distributed fiber optic sensing technology, using corrosion-resistant and high-temperature-resistant special optical fibers as temperature sensors. With a fiber diameter of only 0.5mm, it can be flexibly deployed inside the concrete of the wind turbine foundation, arranged in multiple dimensions along the reinforcing steel frame, enabling continuous temperature monitoring along the fiber path and comprehensively capturing the temperature field distribution within the concrete.

[0010] A distributed fiber optic temperature sensor is a fiber optic sensing system used for real-time measurement of spatial temperature fields. This system employs advanced Optical Time Domain Reflectometer (OTDR) technology, combined with the Raman scattering effect in the optical fiber, to achieve distributed measurement of the temperature field within the sensing fiber. Compared to traditional electrical temperature sensors, distributed fiber optic temperature sensors offer advantages such as resistance to electromagnetic interference, electrical insulation, corrosion resistance, intrinsic safety, high sensitivity, light weight, small size, flexibility, wide range of measurement targets, low cost, long lifespan, and high reliability. They enable rapid multi-point measurement and location. In distributed fiber optic temperature measurement systems, the optical fiber serves as both the sensing and transmission medium. Due to the low cost and long-distance deployment of optical fiber, appropriately encapsulated optical cables can be laid at locations requiring temperature monitoring within concrete structures, enabling long-distance temperature monitoring and early warning of potential fires.

[0011] The data acquisition and transmission module includes a data acquisition unit and a transmission unit.

[0012] The data acquisition unit is equipped with a high-precision photodetector and a signal processor to analyze the optical signals transmitted through the optical fiber, convert the temperature information into electrical signals, and transmit them to the data acquisition unit module. The transmission unit uses wireless transmission, enabling long-distance transmission. Simultaneously, the device has local data storage capabilities to prevent data loss in the event of signal interruption. The power supply module uses a combination of solar energy and lithium batteries. During concrete curing, high-efficiency solar panels are installed on the surface of the device to make full use of the abundant sunlight from the wind farm to power the equipment and charge the lithium batteries. In the absence of sunlight or at night, it automatically switches to lithium battery power to ensure that the equipment operates 24 hours a day and meets the power supply requirements for long-term monitoring. The outer casing and protective structure include the external device housing and the fiber optic protective tube. The external device housing is made of high-strength ABS engineering plastic, which has good impact resistance and corrosion resistance, and can withstand various mechanical impacts and harsh environmental erosion at the wind turbine foundation construction site. The fiber optic protective tube for the sensing fiber optic part uses a special protective sleeve made of polyvinyl chloride, which effectively resists the impact and vibration during concrete pouring.

[0013] The intelligent control module and the data acquisition and transmission module communicate wirelessly.

[0014] This module incorporates intelligent algorithms that enable real-time analysis and processing of the collected temperature data. When the concrete temperature exceeds a preset threshold, it automatically activates an audible and visual alarm and alerts staff via remote push notifications.

[0015] In specific applications, this includes: 1. Scheme Design: Before concrete pouring, fix the sensing optical fibers to the reinforcing steel frame according to the design scheme. The sensing optical fibers are laid out horizontally and vertically along the reinforcing steel frame. Ensure accurate fiber positioning and secure fixing. Sufficient length is reserved at the fiber connection ends for connection to the data acquisition unit. 2. Equipment Installation and Commissioning: Within 24 hours of concrete pouring, install the data acquisition unit, transmission unit, power supply equipment, and intelligent control module. Install the solar panels in well-lit locations around the foundation, and connect the lithium batteries to the solar panels. Perform equipment commissioning, checking the continuity of the sensing fiber optic cables, the accuracy of the temperature data acquisition unit, the stable data transmission of the transmission unit, and the normal operation of the early warning and linkage functions of the intelligent control module. 3. Operation Monitoring: After the device is officially put into operation, the temperature change curve inside the concrete and the temperature data of each monitoring point can be viewed remotely in real time. When the temperature exceeds the preset threshold, the device will automatically issue an audible and visual alarm and remind the staff via remote push notification. 4. Data Processing and Analysis: Temperature data is periodically obtained from the device's local storage and remote management platform. The device's multi-dimensional data analysis function is used to generate temperature gradient maps and trend maps to assess the temperature stress of the concrete and provide a reference for subsequent maintenance work. 5. Maintenance: Inspect the equipment weekly, clean the dust from the solar panel surface to ensure its power generation efficiency; check the lithium battery level to ensure normal power supply during continuous rainy weather; test the data transmission function to ensure stable data transmission.

[0016] Finally, it should be noted that the above description is merely an explanation of the present invention and is not intended to limit the invention. Although the present invention has been described in detail, those skilled in the art can still modify the technical solutions described above or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A large-volume wind turbine foundation concrete intelligent temperature measurement system, comprising a sensing module, a data acquisition and transmission module, a power supply module, and an intelligent control module, characterized in that: The sensing module is located inside the concrete of the wind turbine foundation; the sensing module is connected to the data acquisition and transmission module by optical signal; the data acquisition and transmission module and the intelligent control module are connected wirelessly.

2. The intelligent temperature measurement system for large-volume fan foundation concrete according to claim 1, characterized in that: The sensing module uses distributed sensing optical fiber, and selects special optical fiber that is corrosion-resistant and high-temperature resistant as temperature sensor to be deployed inside the concrete of the wind turbine foundation, and deployed in multiple dimensions along the steel reinforcement skeleton.

3. The intelligent temperature measurement system for large-volume fan foundation concrete according to claim 2, characterized in that: The data acquisition and transmission module includes a data acquisition unit; The data acquisition unit is equipped with a high-precision photodetector and a signal processor. The high-precision photodetector is connected to the distributed sensing fiber optic cable through an optical path interface, analyzes the optical signal transmitted through the fiber optic cable, converts the temperature information into an electrical signal, and transmits it to the signal processor.

4. The intelligent temperature measurement system for large-volume fan foundation concrete according to claim 3, characterized in that: The data acquisition and transmission module also includes a transmission unit; the transmission unit is connected to the signal processor and uses wireless transmission, which can transmit over long distances; the transmission unit has local data storage function to prevent data loss when the signal is interrupted.

5. The intelligent temperature measurement system for large-volume fan foundation concrete according to claim 1, characterized in that: The intelligent control module communicates wirelessly with the data acquisition and transmission module; the intelligent control module has a built-in intelligent algorithm that can analyze and process the collected temperature data in real time; when the concrete temperature exceeds the preset threshold, it automatically activates an audible and visual alarm and alerts staff via remote push notification.

6. The intelligent temperature measurement system for large-volume fan foundation concrete according to claim 1, characterized in that: It also includes a power supply module that powers the data acquisition and transmission module, using a combination of solar energy and lithium batteries. During concrete curing, the solar panels power the equipment and charge the lithium batteries. In the event of insufficient sunlight or at night, it automatically switches to lithium battery power.

7. The intelligent temperature measurement system for large-volume fan foundation concrete according to claim 1, characterized in that: The data acquisition and transmission module includes an external device housing, which is made of high-strength ABS engineering plastic.

8. The intelligent temperature measurement system for large-volume fan foundation concrete according to claim 2, characterized in that: The fiber optic protective tube for sensing optical fibers uses a special protective sleeve made of polyvinyl chloride to resist the impact and vibration during concrete pouring.

9. An application method based on the intelligent temperature measurement system for large-volume fan foundation concrete as described in claim 1, characterized in that: include: S1. Scheme Design: Before concrete pouring, the sensing optical fiber is fixed on the steel reinforcement frame according to the design scheme. The sensing optical fiber is laid out along the steel reinforcement frame in both horizontal and vertical directions. Sufficient length is reserved at the connection end of the optical fiber to connect with the optical path interface of the data acquisition unit. S2. Equipment Installation and Debugging: Within 24 hours after the concrete pouring is completed, install the data acquisition and transmission module, power supply equipment and intelligent control module, install the solar panels in a well-lit location around the foundation, and connect the lithium battery to the solar panels; perform equipment debugging, check whether the sensing fiber optic cable is unobstructed, whether the data acquisition unit can accurately collect temperature data, whether the transmission unit can transmit data stably, and whether the early warning and linkage functions of the intelligent control module are normal. S3. Operation monitoring: After the device is officially put into operation, the temperature change curve inside the concrete and the temperature data of each monitoring point can be viewed remotely in real time; when the temperature exceeds the preset threshold, the device will automatically issue an audible and visual alarm and remind the staff through remote push. S4. Data Processing and Analysis: Regularly acquire temperature data from the device's local storage and remote management platform, utilize the device's multi-dimensional data analysis functions to generate temperature gradient maps and trend maps, assess the temperature stress of the concrete, and provide a reference for subsequent maintenance work.

10. The application method according to claim 9, characterized in that: include: S5. Maintenance: Inspect the equipment once a week, clean the dust on the surface of the solar panels, and ensure its power generation efficiency. Check the lithium battery level to ensure it can supply power normally during continuous rainy weather; test the data transmission function to ensure stable data transmission.

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