Methanol tank car temperature monitoring system based on optical fiber car cover
Through distributed fiber optic sensors based on fiber optic car clothing, the problem that point sensors cannot monitor the temperature of methanol tanker in all directions is solved, and the temperature monitoring of the entire tank is realized without dead angles is improved, transportation safety and reliability are improved, and maintenance costs are reduced. And provide high-precision temperature detection.
Patent Information
- Application Number
- CN202411420272.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-01-03
AI Technical Summary
The existing methanol tanker temperature monitoring method relies on point sensors, and cannot achieve full tank monitoring, there are monitoring blind spots, high cost and complex installation and maintenance.
A distributed fiber sensor based on fiber optic car clothing is adopted to cover the surface of the methanol tanker through an alternately braided grid structure, combined with the Raman scattering effect, and to achieve all-round temperature monitoring, single-mode or multi-mode fibers are used to select appropriate sensing based on distance. and real-time data analysis and alarm through centimeter-level fiber-sensing temperature demodulator.
It realizes the monitoring of temperature without dead angles at all positions during the methanol tanker transportation process, improves safety and reliability, reduces maintenance costs, provides high-precision and high-sensitivity temperature detection, adapts to harsh environments, and optimizes the transportation process.
Smart Images
Figure CN119245860A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of distributed optical fiber sensing, and in particular relates to a methanol tank truck temperature monitoring system based on an optical fiber cover. Background Art
[0002] Methanol is an important chemical raw material and new energy carrier with great application potential. However, methanol is highly volatile and flammable, and there are great safety risks during transportation and storage. Temperature change is one of the important factors causing methanol safety issues. Therefore, temperature monitoring of methanol tankers during transportation is particularly important.
[0003] Existing temperature monitoring methods mainly rely on point sensors. Although these sensors can provide certain temperature monitoring functions, they are unable to achieve comprehensive monitoring of the entire tank due to their limited monitoring points, and are prone to blind spots. In addition, point sensors are more expensive in large-scale temperature monitoring, and are more complicated to install and maintain.
[0004] Traditional methanol tankers are generally limited to explosion-proof point sensors, which are expensive due to their explosion-proof characteristics. In addition, only a few sensors can be installed, and because of cost issues, more sensors cannot be installed, and coverage safety monitoring is even more impossible. Summary of the invention
[0005] In view of the shortcomings of the prior art, the present invention proposes a methanol tanker temperature monitoring system based on optical fiber cover. The application of distributed optical fiber sensors in the temperature monitoring of methanol tankers can achieve real-time monitoring of the entire tank without blind spots, thus improving the safety and reliability during transportation.
[0006] The technical solution of the present invention is as follows: A methanol tanker temperature monitoring system based on optical fiber cover, comprising: Fiber optic car cover, which uses an alternating weaving method to weave optical fibers into a grid-like shape and covers the surface of the methanol tanker. The fiber optic car cover has an interface; The centimeter-level fiber optic sensor temperature demodulator is connected to the fiber optic car cover interface to receive and analyze the data collected by the fiber optic sensor, display the tank temperature distribution in real time and alarm when it is abnormal.
[0007] Furthermore, the optical fiber of the optical fiber car cover has Raman scattering effect, anti-interference ability, high temperature resistance and corrosion resistance.
[0008] Furthermore, the optical fiber is a single-mode optical fiber or a multi-mode optical fiber, the single-mode optical fiber is used for long-distance monitoring, and the multi-mode optical fiber is used for short-distance monitoring; Among them, long distance refers to a range that is longer than half of the tank circumference and longer than 500 meters; Among them, the short distance is a range less than or equal to 500 meters.
[0009] Furthermore, the fiber optic cover covers all surfaces of the tank body, and adopts segmented coverage and fiber optic connection to form a complete monitoring network.
[0010] Furthermore, the optical fiber cover and the methanol tank body are secured with stability by adhesive or fixing devices.
[0011] Furthermore, the grid spacing and weaving density of the optical fiber car cover are determined according to the shape, size and monitoring requirements of the tank body. The spacing is increased for the relatively flat area of the tank body surface, and the spacing is reduced for the seams and curved parts. The beneficial effects of the present invention are as follows: the present invention realizes blind-angle monitoring of the temperature at all locations during the transportation of methanol tank trucks through the distributed optical fiber sensor technology, thereby improving the safety of transportation.
[0012] Fiber optic car covers have high precision and high sensitivity, and can accurately detect tiny temperature changes and discover temperature anomalies in a timely manner.
[0013] The design of the fiber optic car cover makes installation and maintenance more convenient, does not affect the normal operation of the tank truck, and reduces the maintenance cost of the system.
[0014] Centimeter-level fiber optic temperature measurement technology can provide more detailed temperature information, help optimize the transportation process, save energy and reduce emissions, and improve transportation efficiency.
[0015] The distributed fiber optic sensor system has high reliability and strong anti-interference ability. It can work stably under harsh environmental conditions and ensure the safety of methanol transportation. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the overall structure of the methanol tanker covered with optical fiber cover; Figure 2 This is a partial enlarged schematic diagram of the fiber optic car cover. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0018] like Figure 1 and 2As shown, a structural schematic diagram of a methanol tank truck temperature monitoring system based on an optical fiber cover and a partially enlarged schematic diagram of the optical fiber cover of the present invention, the methanol tank truck temperature monitoring system includes: an optical fiber cover and a centimeter-level optical fiber sensing temperature demodulator.
[0019] Fiber optic car cover: An optical fiber about 2,000 meters long is woven into a grid using an alternating weaving method and covered on the surface of the methanol tanker, achieving centimeter-level temperature monitoring through the Raman scattering effect; an interface for a centimeter-level fiber optic sensor temperature demodulator is left on the fiber optic car cover.
[0020] Centimeter-level fiber optic sensor temperature demodulator: The centimeter-level fiber optic sensor temperature demodulator is connected to the interface of the fiber optic car cover, and demodulates the data of 4000 temperature points in real time every 1 second.
[0021] The specific implementation is as follows: 1. Fiber material selection and weaving (1) Fiber material properties Selecting the right optical fiber material is the basis for efficient temperature monitoring. The optical fiber material needs to have good Raman scattering effect, strong anti-interference ability, high temperature resistance and corrosion resistance.
[0022] The Raman scattering effect is the key principle that enables optical fiber to achieve temperature monitoring. When light propagates in an optical fiber, it interacts with the molecules in the optical fiber to generate Raman scattered light. The intensity of Raman scattered light is related to temperature, and temperature monitoring is achieved by measuring the intensity change of Raman scattered light. Therefore, optical fiber materials must have obvious Raman scattering characteristics in order to accurately measure temperature.
[0023] Strong anti-interference ability is to ensure that the optical fiber can work stably in a complex environment. During the transportation of methanol tankers, they will be interfered by various external factors, such as electromagnetic fields, mechanical vibrations, etc. If the anti-interference ability of the optical fiber is not strong, it will lead to inaccurate measurement results. Therefore, the optical fiber material needs to have good anti-interference ability to resist the interference of external factors and ensure the accuracy of temperature monitoring.
[0024] High temperature resistance and corrosion resistance are also very important. During the transportation of methanol tankers, the surface temperature of the tank may be very high, and methanol itself is corrosive. If the optical fiber material is not resistant to high temperature and corrosion, it will cause damage to the optical fiber and fail to work properly. Therefore, the optical fiber material needs to be able to withstand high temperature and corrosive environments to ensure the long-term stable operation of the system.
[0025] (2) Fiber type selection Single-mode optical fiber or multi-mode optical fiber is used as the sensing material.
[0026] Single-mode optical fiber has lower attenuation and higher resolution in long-distance transmission, and is suitable for long-distance temperature monitoring. The core diameter of single-mode optical fiber is small, and light can only propagate in one mode in it, so the energy loss during transmission is small, and long-distance transmission can be achieved, that is, the length exceeds half of the circumference of the tank and the length is greater than 500 meters. At the same time, the resolution of single-mode optical fiber is higher, and the temperature can be measured more accurately.
[0027] Multimode optical fiber has higher signal strength and better anti-interference ability in short-distance monitoring, that is, monitoring within a range of 500 meters or less. The core diameter of multimode optical fiber is larger, and light can propagate in multiple modes in it, so the signal strength is higher during transmission. At the same time, multimode optical fiber also has better anti-interference ability and can work stably in complex environments.
[0028] (3) Weaving technology The weaving process uses an alternating weaving method to interweave the optical fibers to form a grid-like structure.
[0029] The alternating weaving method ensures uniform distribution of optical fibers through mechanical and optical mechanisms, balances forces mechanically, reduces stress concentration, and improves the efficiency of Raman scattered light collection optically. The grid structure has many advantages. It is structurally stable and can withstand vibration and shaking during tanker transportation, keeping the position of the optical fiber unchanged; it can achieve comprehensive monitoring of the surface temperature of the tanker without blind spots, and can adapt to different parts of the tanker; it can also be customized according to the shape and size of the tanker to adapt to different tankers.
[0030] 2. Coverage of Fiber Optic Car Clothing (1) Installation method The woven optical fiber mesh is covered on the surface of the methanol tanker to ensure close contact between the optical fiber and the tank.
[0031] In a possible implementation, an adhesive or a fixing device is used during the installation process to ensure the stability of the optical fiber during transportation.
[0032] (2) Coverage The coverage of the woven mesh should include all surfaces of the tank to achieve comprehensive temperature monitoring.
[0033] In one possible implementation, optical fiber covers of different specifications are customized according to the structure and size of the tank truck.
[0034] (3) Segment coverage and connection In one possible implementation method, a segmented coverage method is used, where the optical fiber network is first covered on the tank body in segments, and then the segments of the optical fiber network are connected together through optical fiber connection technology to form a complete monitoring network.
[0035] 3. Fiber Optic Connection Technology The fiber optic car cover has an interface for the centimeter-level fiber optic sensor temperature demodulator. Through the fiber optic connection technology, the interfaces from different parts of the fiber optic car cover are connected to the centimeter-level fiber optic sensor temperature demodulator.
[0036] 4. Centimeter-level optical fiber sensing temperature demodulator The centimeter-level fiber optic sensor temperature demodulator is used to receive data collected by the fiber optic sensor, analyze it through data processing algorithms, and display the temperature distribution of the tank in real time. When the temperature is abnormal, the centimeter-level fiber optic sensor temperature demodulator will promptly issue an alarm signal to remind the operator to take corresponding measures.
[0037] The centimeter-level fiber optic sensor temperature demodulator is connected to the interface of the fiber optic car cover, and demodulates the data of 40,000 temperature points in real time every second. The centimeter-level fiber optic sensor temperature demodulator needs to have efficient data processing capabilities, powerful storage capabilities, and flexible communication capabilities. In terms of data processing, the centimeter-level fiber optic sensor temperature demodulator can process the massive data collected by the fiber optic car cover in real time, perform data filtering, noise suppression, and anomaly detection, and generate accurate temperature distribution maps and temperature change trend maps. In terms of communication, the centimeter-level fiber optic sensor temperature demodulator has a variety of communication interfaces, supports remote monitoring and data transmission, and is convenient for operators to understand the temperature of the tank at any time.
[0038] 5. Data Analysis and Processing The data collected by the fiber optic car cover is processed through data analysis software to generate temperature distribution diagrams and temperature change trend diagrams. During the data processing process, multiple algorithms are used for data filtering, noise suppression and anomaly detection to ensure the accuracy and reliability of the data.
[0039] The data collected by the fiber optic sensor usually contains a lot of noise and interference signals, which need to be filtered and suppressed by advanced data processing algorithms. In one possible implementation, Kalman filtering, wavelet transform or artificial neural network is used for filtering and suppression. Through in-depth analysis of the data, the changing pattern of the tank temperature is discovered, and abnormal temperature conditions are identified in time, providing an important basis for safety management during transportation.
[0040] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.
[0041] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.
[0042] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.
[0043] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features of the present invention.
[0044] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A methanol tanker temperature monitoring system based on optical fiber car cover, characterized in that: include: Fiber optic car cover, which uses an alternating weaving method to weave optical fibers into a grid-like shape and covers the surface of the methanol tanker. The fiber optic car cover has an interface; The centimeter-level fiber optic sensor temperature demodulator is connected to the fiber optic car cover interface to receive and analyze the data collected by the fiber optic sensor, display the tank temperature distribution in real time and alarm when it is abnormal.
2. According to claim 1, a methanol tanker temperature monitoring system based on optical fiber car cover is characterized in that: The optical fiber of the optical fiber car cover has Raman scattering effect, anti-interference ability, high temperature resistance and corrosion resistance.
3. The temperature monitoring system of a methanol tanker based on an optical fiber cover according to claim 2 is characterized in that: The optical fiber is a single-mode optical fiber or a multi-mode optical fiber. The single-mode optical fiber is used for long-distance monitoring, and the multi-mode optical fiber is used for short-distance monitoring. Among them, long distance refers to a range that is longer than half of the tank circumference and longer than 500 meters; Among them, the short distance is a range less than or equal to 500 meters.
4. The temperature monitoring system of a methanol tanker based on an optical fiber cover according to claim 2 is characterized in that: The optical fiber cover covers all surfaces of the tank body and adopts segmented coverage and optical fiber connection to form a complete monitoring network.
5. The temperature monitoring system of a methanol tanker based on an optical fiber cover according to claim 4 is characterized in that: The optical fiber car cover and the methanol tank body are stabilized by adhesive or fixing devices.
6. A methanol tanker temperature monitoring system based on optical fiber cover according to claim 5, characterized in that: The grid spacing and weaving density of the optical fiber car cover are determined according to the shape, size and monitoring requirements of the tank body. The spacing is increased for relatively flat areas on the tank body surface, and is reduced for seams and curved parts.