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CN-116576401-B - Seawater pipeline working condition parameter on-line monitoring device and method

CN116576401BCN 116576401 BCN116576401 BCN 116576401BCN-116576401-B

Abstract

The invention belongs to the technical field of environmental parameter monitoring, and relates to a seawater pipeline working condition parameter on-line monitoring device and method, wherein a multifunctional hydrogel sensor converts an external stimulus signal based on the temperature/stress sensitivity of a conductive hydrogel wide response interval, can be applied to underwater environmental scenes, is arranged on a seawater pipeline, can perform an intelligent on-line monitoring sensing technology evaluation test, heats/cools seawater media in complex components of the seawater pipeline, measures a sensing module signal value under the condition of temperature change, generates a visual parameter value by a signal processor according to a standard curve, monitors the temperature change condition of the seawater media in the seawater pipeline on line by observing a data display, calculates the relative error of actual parameters and identifies conversion sensitivity, and analyzes the signal accuracy of a working condition parameter sensing function; the device can realize monitoring and sensing of temperature, flow velocity, particulate matter content and foreign matter impact, and reduce the number of components and the load burden of a seawater pipeline system.

Inventors

  • ZHANG YIHAN
  • ZHANG HAIBING
  • MA LI
  • LI QINGYIN
  • LI ZHEN
  • XING SHAOHUA

Assignees

  • 洛阳船舶材料研究所(中国船舶集团有限公司第七二五研究所)

Dates

Publication Date
20260508
Application Date
20230516

Claims (6)

  1. 1. The on-line monitoring device for the seawater pipeline working condition parameters is characterized in that the main structure of the hydrogel sensor comprises a chip arranged at the front end part of a shell, a protective layer arranged on the inner surface and the outer surface of the chip, signal transmission wires arranged at two ends of any diameter and a fixed layer arranged between the shell and the signal transmission wires; The chip is integrated with four functional sensing modules of seawater pipeline temperature, flow rate, particle content and foreign matter impact, wherein the flow rate, particle content and foreign matter impact sensing modules convert the strain quantity of fluid impact into electrochemical signals to monitor working condition parameters of the seawater pipeline on line, and the temperature sensing modules eliminate conductive hydrogel strain interference factors through a hard sheet layer with high heat conductivity covered on the outer surface of the protective layer to monitor the temperature change condition of the seawater environment.
  2. 2. The on-line monitoring device for seawater pipeline operating conditions according to claim 1, wherein the hydrogel sensor has a dimension of Φ15×40mm.
  3. 3. The on-line monitoring device for seawater pipeline operating condition parameters according to claim 1, wherein the chip is located at the front end of the hydrogel sensor and is in contact with seawater flowing in the seawater pipeline, the chip is made of conventional temperature/strain sensitive conductive hydrogel, the protection layer is made of flexible polydimethylsiloxane, and the fixing layer is made of epoxy resin, so that the chip is fixed at the front end of the shell in a sealing mode, and the chip can transmit the flowing seawater environmental parameter response signals to the signal processing unit.
  4. 4. The on-line seawater pipeline operating condition parameter monitoring device according to claim 1, wherein the specific process engineering for on-line seawater pipeline operating condition parameter monitoring is as follows: (1) Firstly, mounting a hydrogel sensor on a seawater pipeline to be monitored, then connecting the hydrogel sensor with a signal processor, and finally connecting the signal processor with a data display; (2) Measuring and collecting electrochemical signals under the conditions of simulating temperature, flow speed and particulate matter content changes and impacting foreign matters of different sizes, establishing a database, programming a signal analysis program, and converting the electrochemical signal values into visual parameters; (3) And (3) testing, namely monitoring the internal temperature, the flow speed and the particulate matter content change of the seawater pipeline and the signal value of a sensing module under the condition of impact of foreign matters of different sizes through a hydrogel sensor, and analyzing the stability and the accuracy of signal data.
  5. 5. The on-line seawater pipeline operating condition parameter monitoring device according to claim 4, wherein the on-line seawater pipeline operating condition parameter monitoring device comprises the following specific processes: (1) Firstly, selecting a standard 90-degree elbow component with the diameter phi of 80mm as a seawater pipeline to be monitored, perforating the seawater pipeline, screwing and fixing a hydrogel sensor at the perforated position, then connecting the hydrogel sensor with a signal processor through a lead, finally connecting the signal processor with a data display, and starting an external power supply; (2) The method comprises the steps of simulating, namely controlling the unique parameter variable of the internal working condition of a seawater pipeline, measuring the response interval of electrochemical signals under the conditions of simulating temperature, flow rate and particulate matter content changes and foreign matters of different sizes impacting, collecting and processing electrochemical signal data through a signal processor, establishing a working condition parameter change signal database in the response interval, classifying and identifying the electrochemical signals through programming a signal analysis program, generating a response signal standard curve, and converting the electrochemical signal values into visual parameters of a data display; (3) And (3) starting a signal analysis program of the signal processor, analyzing the signal values of the sensing module under the conditions of monitoring the internal temperature, the flow rate, the particle content change and the impact of foreign matters of different sizes of the seawater pipeline through the hydrogel sensor, and observing the visual parameter values of the data display so as to analyze and calculate the relative errors of actual parameters and identify conversion sensitivity.
  6. 6. The on-line monitoring device for seawater pipeline working condition parameters according to claim 4, wherein the chip establishes a characteristic equation between the conductivity of the chip and external environment parameters through the temperature/strain sensitive response characteristic of the material, and converts the change data of the conductivity of the material and the working condition parameters of the seawater pipeline to realize analysis and conversion of the changes of the internal temperature, the flow rate and the particulate matter content of the seawater pipeline and the values of foreign matter impact signals with different sizes.

Description

Seawater pipeline working condition parameter on-line monitoring device and method Technical field: the invention belongs to the technical field of environmental parameter monitoring, and relates to a seawater pipeline working condition parameter on-line monitoring device and method, which realize on-line sensing and monitoring of complex component working condition parameters in a seawater flowing environment. The background technology is as follows: the seawater pipeline is in a complex state of fluid flushing, medium change and temperature fluctuation in the normal condition, so that the problem of abnormal corrosion of the pipeline is easily caused, and the efficacy of the seawater pipeline is restricted. The comprehensive monitoring control for parameter change and abnormality problems is carried out on the internal working condition environment of the seawater pipeline, and the comprehensive monitoring control method has important practical significance for exploring a reasonable seawater pipeline corrosion control strategy and accurately monitoring corrosion parts of a marine equipment pipeline system. In the prior art, the sea water pipeline environmental parameter monitoring generally adopts means such as device arrangement and installation at easy-to-punch parts such as straight pipe sections and the like, and the equipment component working condition parameter change is monitored through an electromagnetic flow method and an average pipe process temperature measurement method. The environmental parameter monitoring of complex components and small pipeline equipment still uses devices such as thermocouples, liquid flow meters and the like to carry out internal single numerical measurement in a large quantity, and the defects that the on-line monitoring function of the abnormal working condition parameters is low in integration degree, the monitoring means of the seawater environmental working condition parameters in the components are insufficient and the like exist. For example, chinese patent 201922207552.0 discloses a waste water pipeline monitoring device with velocity of flow monitoring function, including monitoring unit, installed part and connecting axle, one side of monitoring unit runs through and has into the liquid pipe, and the opposite side of monitoring unit is provided with the drain pipe to monitoring unit's last fixed surface has the connecting plate, the installed part is installed in the intermediate position of connecting plate, and the spacing groove has been seted up to the bottom of installed part, the inside of spacing groove runs through the one end that has the stopper, and the other end of stopper is connected with extrusion spring, the upper surface fixed of stopper has the shifting block, and the spout has been seted up in the outside of shifting block to be welded connection between shifting block and the stopper, the connecting axle sets up in the inside of installed part, and the flowmeter is installed to the one end of connecting axle, and the flabellum is installed to the other end of connecting axle, the inside of installed part is fixed with the dead lever, and the outer wall of installed part is provided with the closing plate. Although the device has the flow speed monitoring function, the device is inconvenient to disassemble and overhaul in the use process, the accuracy of flow speed monitoring is poor, the function is single, and the practicability is influenced. With the innovation and progress of new seawater pipeline environmental parameter monitoring technology, the monitoring equipment and method combining traditional data acquisition and laboratory analysis cannot meet the basic requirements of seawater pipeline working condition parameter monitoring, and environmental monitoring systems are evolving towards automation, intellectualization and networking. Therefore, the device and the method for on-line monitoring of the seawater pipeline working condition parameters are developed and designed, and the seawater environment parameters are monitored based on the sensor network, so that the device and the method have the advantages of low cost, strong reliability, strong adaptability, strong expansion capability and the like, and have wide market prospect. The invention comprises the following steps: The invention aims to overcome the defects of the prior art, and develops and designs an on-line monitoring device and an on-line monitoring method for the seawater pipeline working condition parameters, so that the internal working condition environment parameter change and foreign object impact monitoring are realized, and the regional condition and the perception sensitivity of the seawater pipeline working condition parameter monitoring are widened. In order to achieve the aim, the main structure of the seawater pipeline working condition parameter on-line monitoring device comprises a hydrogel sensor, a signal processor and a data display, wherein the