A seawater pipeline working condition parameter on-line monitoring device and method

Abstract

The present application belongs to the technical field of environmental parameter monitoring, and relates to a seawater pipeline working condition parameter online monitoring device and method. A multifunctional hydrogel sensor converts external stimulation signals based on the temperature / stress sensitivity of the wide response interval of the conductive hydrogel, can be applied to underwater environment scenes, is installed on a seawater pipeline, can perform intelligent online monitoring and sensing technology evaluation tests, heats / cooling the seawater medium inside the seawater pipeline complex component, measures the signal value of the sensing module under temperature change, generates visual parameter values according to the standard curve by the signal processor, monitors the temperature change of the seawater medium inside the seawater pipeline online through the observation data display, calculates the relative error of the actual parameters and the identification conversion sensitivity, and analyzes the signal accuracy of the working condition parameter sensing function. The present application can realize temperature, flow rate, particulate matter content and foreign object impact monitoring and sensing, and reduce the number and load of seawater pipeline system components.

Description

Technical fields:

[0001] This invention belongs to the field of environmental parameter monitoring technology, and relates to an online monitoring device and method for the operating parameters of seawater pipelines, realizing online sensing and monitoring of the operating parameters of complex components in a seawater flow environment. Background technology:

[0002] Seawater pipelines are typically subjected to complex conditions involving fluid erosion, media changes, and temperature fluctuations, making them prone to abnormal corrosion and hindering their effectiveness. Comprehensive monitoring and control of parameter changes and anomalies within the operating environment of seawater pipelines is of significant practical importance for exploring reasonable corrosion control strategies and accurately monitoring corrosion sites in marine equipment pipeline systems.

[0003] In existing technologies, monitoring of environmental parameters in seawater pipelines typically involves installing devices in easily drilled sections such as straight pipe sections, and monitoring changes in the operating parameters of equipment components using electromagnetic flow methods and average pipe-side temperature measurement methods. However, environmental parameter monitoring of complex components and small pipeline equipment still largely relies on devices such as thermocouples and liquid flow meters for single internal numerical measurement. This approach suffers from drawbacks such as low integration of online monitoring functions for abnormal operating parameters and insufficient means of monitoring the seawater environmental operating parameters inside the components. For example, Chinese Patent 201922207552.0 discloses a wastewater conveying pipeline monitoring device with flow rate monitoring function, including a monitoring unit, an installation component, and a connecting shaft. One side of the monitoring unit has an inlet pipe, and the other side has an outlet pipe. A connecting plate is fixed to the upper surface of the monitoring unit. The installation component is installed in the middle of the connecting plate, and a limiting groove is formed at the bottom of the installation component. One end of a limiting block passes through the limiting groove, and a compression spring is connected to the other end of the limiting block. A lever is fixed to the upper surface of the limiting block, and a sliding groove is formed on the outer side of the lever. The lever and the limiting block are welded together. The connecting shaft is located inside the installation component, with a flow meter installed at one end and a fan blade installed at the other end. A fixing rod is fixed inside the installation component, and a sealing plate is provided on the outer wall of the installation component. Although it has flow rate monitoring function, it is inconvenient to disassemble and maintain during use, has poor accuracy in flow rate monitoring, and its function is limited, affecting its practicality. With the innovation and advancement of new technologies for monitoring environmental parameters in seawater pipelines, traditional monitoring equipment and methods that combine data acquisition with laboratory analysis can no longer meet the basic needs of monitoring seawater pipeline operating parameters. Environmental monitoring systems are developing towards automation, intelligence, and networking. Therefore, developing an online monitoring device and method for seawater pipeline operating parameters based on sensor networks offers advantages such as low cost, high reliability, strong adaptability, and strong scalability, and has broad market prospects. Summary of the Invention:

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and to develop and design an online monitoring device and method for seawater pipeline operating parameters, so as to realize the monitoring of changes in internal operating environment parameters and foreign object impacts, and to broaden the area conditions and sensing sensitivity of seawater pipeline operating parameter monitoring.

[0005] To achieve the above objectives, the main structure of the online monitoring device for seawater pipeline operating parameters disclosed in this invention includes a hydrogel sensor installed on the seawater pipeline, a signal processor connected to the hydrogel sensor, and a data display connected to the signal processor. The main structure of the hydrogel sensor includes a chip installed at the front end of the outer shell, a protective layer on the inner and outer surfaces of the chip, signal transmission wires at both ends of any diameter, and a fixing layer between the outer shell and the signal transmission wires. Furthermore, the chip integrates four functional sensing modules for seawater pipeline temperature, flow rate, particulate matter content, and foreign object impact. The flow rate, particulate matter content, and foreign object impact sensing modules convert the strain of fluid impact into electrochemical signals to monitor the operating parameters of the seawater pipeline 1 online. The temperature sensing module uses a hard sheet with a high thermal conductivity coefficient covering the outer surface of the protective layer to eliminate interference factors from the conductive hydrogel strain and monitor changes in the seawater environment temperature.

[0006] The chip involved in this invention is located at the front end of the hydrogel sensor and is in contact with the flowing seawater in the seawater pipeline. The chip is made of conventional temperature / strain sensitive conductive hydrogel. The protective layer is made of flexible polydimethylsiloxane. The fixing layer is made of epoxy resin, which seals and fixes the chip to the front end of the shell, so that it can transmit the response signal of the flowing seawater environmental parameters to the signal processing unit in real time.

[0007] The present invention relates to an online monitoring method for operating parameters of seawater pipelines, which is implemented based on an online monitoring device for operating parameters of seawater pipelines. The specific process is as follows:

[0008] (1) Assembly: First, install the hydrogel sensor on the seawater pipeline to be monitored. Then, connect the hydrogel sensor to the signal processor. Finally, connect the signal processor to the data display.

[0009] (2) Simulation: Electrochemical signals under simulated temperature, flow rate and particulate matter content changes and impact of foreign objects of different sizes were measured and collected. A database was established, a signal analysis program was developed, and the electrochemical signal values ​​were converted into visual parameters.

[0010] (3) Testing: The internal temperature, flow rate, particulate matter content changes and the sensor module signal values ​​under different sizes of foreign objects impacting the seawater pipeline are monitored by the hydrogel sensor. The stability and accuracy of the signal data are analyzed. Specifically, the chip establishes a characteristic equation between its own conductivity and external environmental parameters through the temperature / strain sensitive response characteristics of the material, and converts the material conductivity change data with the working parameters of the seawater pipeline to realize the analysis and conversion of the internal temperature, flow rate, particulate matter content changes and the signal values ​​of different sizes of foreign objects impacting the seawater pipeline.

[0011] Compared with existing technologies, this invention utilizes a multifunctional hydrogel sensor that converts external stimulus signals based on the temperature / stress sensitivity of conductive hydrogels over a wide response range. Applicable to underwater environments and installed on seawater pipelines, it enables intelligent online monitoring and sensing technology evaluation experiments. It heats / cools the seawater medium inside complex components of seawater pipelines, measures the sensor module signal values ​​under temperature changes, and generates visualized parameter values ​​based on a standard curve using a signal processor. The sensor monitors the temperature changes of the seawater medium inside the pipeline online by observing the data display, simultaneously calculating the relative error of actual parameters and the recognition conversion sensitivity, and analyzing the signal accuracy of the operating condition parameter sensing function. Its structure is simple, and its manufacturing and usage costs are low. Through functionalized sensing modules, it establishes a signal database of common operating condition parameters such as temperature and flow rate, enabling monitoring and sensing of temperature, flow rate, particulate matter content, and foreign object impact. This reduces the number of components and the load burden on seawater pipeline systems, and the electrochemical signal is stable during the monitoring process, allowing for real-time parameter monitoring. Attached image description:

[0012] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0013] Figure 2 This is a schematic diagram illustrating the structural principle of the hydrogel sensor involved in this invention.

[0014] Figure 3 This is a physical image of the hydrogel sensor involved in the present invention. Specific implementation methods:

[0015] The present invention will be further described below with reference to the accompanying drawings and specific implementation methods.

[0016] Example 1:

[0017] The main structure of the online monitoring device for seawater pipeline operating parameters involved in this embodiment is as follows: Figure 1 As shown, it includes a seawater pipeline 1, a hydrogel sensor 2, a wire 3, a signal processor 4, and a data display 5; the seawater pipeline 1 is equipped with a cylindrical hydrogel sensor 2, which is connected to the signal processor 4 via the wire 3, and the signal processor 4 is connected to the data display 5.

[0018] The hydrogel sensor 2 involved in this embodiment has dimensions of Φ15×40mm, and its main structure is as follows: Figure 2 As shown, it includes a housing 21, a chip 22, a protective layer 23, a signal transmission wire 24, and a fixing layer 25. The chip 22 is provided at the front end of the housing 21. The protective layer 23 is provided on both the inner and outer surfaces of the chip 22. The signal transmission wire 24, which is provided at both ends of any diameter, extends outward along the inner wall of the housing 21. The fixing layer 25 is provided between the housing 21 and the signal transmission wire 24. The fixing layer 25 is formed by casting and curing conventional EP epoxy resin.

[0019] The process of using the online monitoring device for seawater pipeline operating parameters involved in this embodiment is as follows:

[0020] (1) Assembly: First, select a standard 90° elbow component with a diameter of Φ80mm as the seawater pipeline 1 to be monitored, make a hole in it, tighten the hydrogel sensor 2 at the hole, then connect the hydrogel sensor 2 to the signal processor 4 through the wire 3, and finally connect the signal processor 4 to the data display 5 and turn on the external power supply.

[0021] (2) Simulation: The internal operating parameters of the control seawater pipeline 1 are unique. The electrochemical signal response range under the simulated temperature, flow rate and particulate matter content changes and foreign object impact environments of different sizes is measured. Electrochemical signal data is collected and processed by the signal processor 4. A database of operating parameter change signals within the response range is established. Electrochemical signals are classified and identified by developing a signal analysis program, and a response signal standard curve is generated. Electrochemical signal values ​​are converted into visual parameters on the data display 5.

[0022] (3) Test: Start the signal analysis program of the signal processor 4, analyze the sensor module signal values ​​under the conditions of internal temperature, flow rate, particulate matter content change and impact of foreign objects of different sizes in the seawater pipeline 1 monitored by the hydrogel sensor 2, observe the visualized parameter values ​​of the data display 5, and analyze and calculate the relative error of the actual parameters and the recognition conversion sensitivity.

[0023] Example 2:

[0024] The chip 22 of the online monitoring device for seawater pipeline operating parameters involved in this embodiment is made of polyvinyl alcohol / phytic acid hydrogel, and its specific process for online monitoring of the internal temperature of seawater pipeline 1 is as follows:

[0025] First, a standard 90° elbow component with a diameter of Φ80mm is selected as the seawater pipeline 1 to be monitored. The hydrogel sensor 2 is placed at the center of the diameter of the seawater pipeline 1 and connected to the signal processor 4 to collect the response signal.

[0026] Then, the operating parameters of seawater pipeline 1 were adjusted, the electrochemical signal response range of the temperature sensing module was measured, and the internal temperature parameter signal data of seawater pipeline 1 from 10-80℃ were collected and processed to establish a database of operating parameter change signals within the response range.

[0027] Finally, a signal analysis program was developed to classify and identify the electrochemical signals, convert the electrochemical signal values ​​into standard curves, and present the visualized parameters on the data display 5.

[0028] To evaluate the sensitivity and stability of the signal analysis program and the functional sensing module, the seawater pipeline 1 was designed with reference to the structural dimensions of commonly used seawater pipelines in marine environmental engineering equipment, and a typical complex irregular component was selected: a 90° standard elbow with a diameter of Φ80mm.

Claims

1. An online monitoring device for operating parameters of a seawater pipeline, the main structure comprising a hydrogel sensor installed on the seawater pipeline, a signal processor connected to the hydrogel sensor, and a data display connected to the signal processor; characterized in that, The main structure of the hydrogel sensor includes a chip at the front end of the shell, a protective layer on the inner and outer surfaces of the chip, signal transmission wires at both ends of any diameter, and a fixing layer between the shell and the signal transmission wires. The chip integrates four functional sensing modules for seawater pipeline temperature, flow rate, particulate matter content, and foreign object impact. Among them, the flow rate, particulate matter content, and foreign object impact sensing modules convert the strain of fluid impact into electrochemical signals to monitor the operating parameters of the seawater pipeline online. The temperature sensing module uses a rigid sheet with a high thermal conductivity coefficient covering the outer surface of the protective layer to eliminate the interference factors of conductive hydrogel strain and monitor the changes in seawater ambient temperature.

2. The online monitoring device for seawater pipeline operating parameters according to claim 1, characterized in that, The hydrogel sensor measures Φ15×40mm.

3. The online monitoring device for seawater pipeline operating parameters according to claim 1, characterized in that, The chip is located at the front end of the hydrogel sensor and comes into contact with the flowing seawater in the seawater pipeline. The chip is made of conventional temperature / strain sensitive conductive hydrogel. The protective layer is made of flexible polydimethylsiloxane. The fixing layer is made of epoxy resin, which seals and fixes the chip to the front end of the shell, enabling it to transmit the response signal of the flowing seawater environmental parameters to the signal processing unit in real time.

4. The online monitoring device for seawater pipeline operating parameters according to claim 1, characterized in that, The specific process engineering for online monitoring of operating parameters of seawater pipelines is as follows: (1) Assembly: First, install the hydrogel sensor on the seawater pipeline to be monitored. Then, connect the hydrogel sensor to the signal processor. Finally, connect the signal processor to the data display. (2) Simulation: Electrochemical signals under simulated temperature, flow rate and particulate matter content changes and impact of foreign objects of different sizes were measured and collected. A database was established, a signal analysis program was developed, and the electrochemical signal values ​​were converted into visual parameters. (3) Testing: The internal temperature, flow rate, particulate matter content changes of the seawater pipeline and the sensor module signal values ​​under the impact of foreign objects of different sizes are monitored by hydrogel sensors, and the stability and accuracy of the signal data are analyzed.

5. The online monitoring device for seawater pipeline operating parameters according to claim 4, characterized in that, The specific process is as follows: (1) Assembly: First, select a standard 90° elbow component with a diameter of Φ80mm as the seawater pipeline to be monitored, make a hole in it, tighten the hydrogel sensor in the hole, then connect the hydrogel sensor to the signal processor through the wire, and finally connect the signal processor to the data display and turn on the external power supply. (2) Simulation: The internal operating parameters of the control seawater pipeline are unique. The electrochemical signal response range under simulated temperature, flow rate and particulate matter content changes and foreign object impact of different sizes is measured. Electrochemical signal data is collected and processed by a signal processor to establish a database of operating parameter change signals within the response range. Electrochemical signals are classified and identified by developing a signal analysis program to generate a standard curve of response signals. Electrochemical signal values ​​are converted into visual parameters of the data display. (3) Testing: Start the signal analysis program of the signal processor, analyze the sensor module signal values ​​under the conditions of internal temperature, flow rate, particulate matter content change and foreign object impact of different sizes in the seawater pipeline monitored by the hydrogel sensor, observe the visualized parameter values ​​of the data display, and analyze and calculate the relative error of the actual parameters and the recognition conversion sensitivity.

6. The online monitoring device for seawater pipeline operating parameters according to claim 4, characterized in that, The chip establishes a characteristic equation between its own conductivity and external environmental parameters by utilizing the temperature / strain sensitive response characteristics of the material, and converts the material conductivity change data with the operating parameters of the seawater pipeline to realize the analysis and conversion of the changes in temperature, flow rate and particulate matter content inside the seawater pipeline and the impact signal values ​​of foreign objects of different sizes.

Images