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CN-122016238-A - Measurement device for pulse pressure of ship propeller and ship navigation state monitoring method

CN122016238ACN 122016238 ACN122016238 ACN 122016238ACN-122016238-A

Abstract

The invention provides a measuring device for the pulse pressure of a ship propeller and a ship navigation state monitoring method, wherein the measuring device comprises a mounting base, a quick connecting assembly and a shell. The quick connecting assembly is arranged at the other end of the installation base, one end of the quick connecting assembly is provided with a pressure sensor, the other end of the quick connecting assembly is fixedly clamped with the other end of the installation base so as to realize detachable connection of the pressure sensor and the installation base, the pressure sensor is in communication connection with the central control system through a signal cable pre-embedded in the installation base so as to monitor pulsation pressure signals of a ship propeller in real time, the casing is sleeved outside the pressure sensor, and one end of the casing is fixedly connected with one end of the quick connecting assembly. The scheme provided by the invention can reduce the monitoring cost of the pulse pressure of the ship propeller, and simultaneously, the monitored pulse pressure of the propeller and the operation parameters are fused and identified, so that the basis is provided for safe and green operation of the ship.

Inventors

  • DING NING
  • WANG JIANHUA
  • WAN DECHENG

Assignees

  • 上海交通大学

Dates

Publication Date
20260512
Application Date
20260331

Claims (10)

  1. 1. A device for measuring the pulsating pressure of a marine propeller, comprising: One end of the mounting base (2) is fixed on a preset monitoring point position of the ship body outer plate (1); The quick connecting assembly (3) is arranged at the other end of the mounting base (2), the pressure sensor (4) is arranged at one end of the quick connecting assembly (3), the other end of the quick connecting assembly (3) and the other end of the mounting base (2) can be clamped and fixed so as to realize the detachable connection of the pressure sensor (4) and the mounting base (2), the pressure sensor (4) is in communication connection with the central control system through a signal cable (5) pre-buried in the mounting base (2) so as to monitor the pulsating pressure signal of the ship propeller in real time, and And the shell (6) is sleeved outside the pressure sensor (4), and one end of the shell (6) is fixedly connected with one end of the quick connecting assembly (3).
  2. 2. The device for measuring the pulsating pressure of a marine propeller according to claim 1, characterized in that the quick connection assembly (3) comprises: the first flange plate (31) is sleeved at one end of the shell (6), and a plurality of first screw holes are formed in the first flange plate (31); A second flange plate (32) arranged opposite to the first flange plate (31), wherein a plurality of second screw holes opposite to the first screw holes are arranged on the second flange plate (32), and The locking lugs (33) are uniformly distributed at the other end of the second flange plate (32) and can be clamped and fixed with the other end of the mounting base (2).
  3. 3. The device for measuring the pulse pressure of the ship propeller according to claim 2, wherein a plurality of guiding structures are arranged at the other end of the installation base (2), the guiding structures are uniformly distributed at the other end of the installation base (2), and the guiding structures are in one-to-one correspondence with the locking lugs (33) and can be clamped and fixed with the locking lugs (33).
  4. 4. A device for measuring the pulsating pressure of a marine propeller as claimed in claim 3, wherein each guiding structure comprises: The guide groove (21) is formed in the other end of the mounting base (2), and the shape of the guide groove (21) is matched with the shape of the end part of the locking lug (33); the limiting block (22) is arranged in the guide groove (21) and is positioned at one end of the guide groove (21); A locking pin (23) arranged at one side of the guide groove (21), one end of the locking pin (23) is positioned in the guide groove (21), the other end is arranged outside the guide groove (21), and The locking lug (33) is inserted into and moves to the position of the limiting block (22) along the guide groove (21), the locking pin (23) is pressed to squeeze the elastic piece, and one end of the locking pin (23) is clamped and fixed with the end part of the locking lug (33) under the elastic action of the elastic piece.
  5. 5. The measurement device of the pulse pressure of the ship propeller according to claim 1, further comprising: The pre-amplifier (7) is arranged in the shell (6), one end of the pre-amplifier (7) is in communication connection with the pressure sensor (4), and the other end of the pre-amplifier (7) is connected with the signal cable (5) through the cable switching terminal (8).
  6. 6. The device for measuring the pulsating pressure of a marine propeller as claimed in claim 5, characterized in that the housing (6) is provided in the shape of a streamlined pod and the surface of the housing (6) is coated with an anti-fouling coating, and/or The underwater wet plug electric connector (24) is arranged on the mounting base (2), one end of the underwater wet plug electric connector (24) is connected with the signal cable (5), and the other end of the underwater wet plug electric connector is connected with the cable switching terminal (8) in a clamping mode.
  7. 7. The ship sailing state monitoring method based on the pulse pressure of the ship propeller is characterized by comprising the following steps of: Acquiring a pulse pressure signal of a propeller of a ship during sailing and operating parameters of a ship driving control system in a preset period, wherein the pulse pressure signal is obtained by monitoring based on the measuring device of the pulse pressure of the ship propeller according to any one of claims 1 to 6; Determining a multi-dimensional feature vector of the ship when sailing within a preset period based on the pulsating pressure signal and the operation parameter, wherein the multi-dimensional feature vector comprises a plurality of feature values; and determining a target sailing event which occurs when the ship sails within a preset period of time based on the multidimensional feature vector, wherein the target sailing event comprises a cavitation event, a steering event and an emergency stop event.
  8. 8. The ship sailing state monitoring method based on the pulse pressure of the ship propeller of claim 7, wherein determining the multidimensional feature vector of the ship when sailing within a preset period of time based on the pulse pressure signal and the operation parameter comprises: Extracting time domain features, frequency domain features and time frequency features of the pulsating pressure signal to obtain at least one pulsating pressure feature value of the pulsating pressure signal; Extracting characteristics of the operation parameters to obtain at least one operation characteristic value of the operation parameters; determining a composite characteristic value of the ship when sailing within a preset period of time based on at least one pulse pressure characteristic value and at least one operation characteristic value; the multi-dimensional feature vector is determined based on the pulsating pressure signal, the operating parameter, at least one of the pulsating pressure feature values, at least one of the operating feature values, and the composite feature value.
  9. 9. The ship sailing state monitoring method based on the pulse pressure of the ship propeller of claim 7, wherein determining the target sailing event that occurs when the ship sails within the preset period of time based on the multidimensional feature vector comprises: when the comprehensive cavitation index in the multi-dimensional feature vector is larger than a cavitation index threshold, the rotating speed change rate in the multi-dimensional feature vector is larger than the rotating speed change rate, and the shallow water factor in the multi-dimensional feature vector is smaller than a shallow water factor threshold, determining that cavitation events occur when the ship sails in a preset period; when the rudder angle change rate in the multidimensional feature vector is larger than a rudder angle change rate threshold value and the rudder angle absolute value in the multidimensional feature vector is larger than a rudder angle threshold value, determining that a steering event occurs when the ship sails within a preset period; And when the rotating speed change rate in the multidimensional feature vector is smaller than the rotating speed change rate threshold value, determining that the ship is in emergency stop during navigation within a preset period.
  10. 10. The ship sailing state monitoring method based on the pulse pressure of the ship propeller of claim 7, further comprising: And determining a target monitoring mode of the measuring device and a target sampling frequency of the ship driving control system based on the target navigation event, and outputting monitoring data under the target monitoring mode and the target sampling frequency, wherein the monitoring mode of the measuring device comprises a background monitoring mode and a fine capturing mode, and the sampling frequency of the ship driving control system side comprises a first preset sampling frequency and a second preset sampling frequency, wherein the first preset sampling frequency is smaller than the second preset sampling frequency.

Description

Measurement device for pulse pressure of ship propeller and ship navigation state monitoring method Technical Field The invention belongs to the technical field of ship navigation state monitoring, and particularly relates to a device and a method for measuring pulse pressure of a ship propeller. Background The propeller pulsating pressure is the main excitation source for causing the vibration of the ship body, and the accurate measurement is important for the design and vibration reduction of the ship. At present, the actual ship is mainly measured by adopting a mode of directly installing a sensor, and the method is 1. The installation is difficult, namely, the ship body structure is damaged by punching or welding, and the risk of water leakage exists. 2. The sensor is not reusable, is usually installed at one time, is difficult to recycle for other ships, and has high cost. And 3, the measuring efficiency is low, the time and the labor are consumed in mounting and dismounting, the testing period is influenced, and the like. In addition, due to the lack of a device for reliably and stably acquiring the pulse pressure of the high-quality ship propeller for a long time, the cognition on key states such as cavitation of the ship propeller is always remained in a post, off-line and one-sided stage, and the real-time safety and energy efficiency optimization of the ship cannot be serviced. Disclosure of Invention The invention aims to solve the technical problem of providing a measuring device for the pulse pressure of a ship propeller and a ship navigation state monitoring method, so as to accurately monitor the pulse pressure of the ship propeller in real time, reduce the cost of the existing monitoring equipment, and simultaneously combine operating parameters to perform fusion processing and identification, thereby providing a basis for safe and green operation of the ship. To solve the above technical problems, an embodiment of the present invention provides a device for measuring a pulse pressure of a ship propeller, including: The mounting base is provided with one end fixed on a preset monitoring point position of the hull plate; The quick connection assembly is arranged at the other end of the installation base, one end of the quick connection assembly is provided with a pressure sensor, the other end of the quick connection assembly is fixedly clamped with the other end of the installation base so as to realize the detachable connection of the pressure sensor and the installation base, the pressure sensor is in communication connection with a central control system through a signal cable pre-embedded in the installation base so as to monitor the pulsating pressure signal of the ship propeller in real time, and The shell is sleeved outside the pressure sensor, and one end of the shell is fixedly connected with one end of the quick connecting assembly. In one embodiment, the quick connect assembly comprises: The first flange plate is sleeved at one end of the shell, and a plurality of first screw holes are formed in the first flange plate; a second flange plate which is arranged opposite to the first flange plate and is provided with a plurality of second screw holes opposite to the first screw holes, and The locking lugs are uniformly distributed at the other end of the second flange plate and can be clamped and fixed with the other end of the mounting base. In one embodiment, the other end of the mounting base is provided with a plurality of guide structures, the guide structures are uniformly distributed at the other end of the mounting base, and the guide structures are in one-to-one correspondence with the locking lugs and can be clamped and fixed with the locking lugs. In one embodiment, each guide structure comprises: The guide groove is formed in the other end of the mounting base, and the shape of the guide groove is matched with that of the end part of the locking lug; the limiting block is arranged in the guide groove and is positioned at one end of the guide groove; A locking pin arranged at one side of the guide groove, one end of the locking pin is arranged in the guide groove, the other end is arranged outside the guide groove, and When the locking lug is inserted into and moves to the position of the limiting block along the guide groove, the locking pin is pressed to squeeze the elastic piece, and one end of the locking pin is clamped and fixed with the end part of the locking lug under the elastic action of the elastic piece. In one embodiment, the device for measuring the pulse pressure of the ship propeller further comprises: and one end of the pre-amplifier is in communication connection with the pressure sensor, and the other end of the pre-amplifier is electrically connected with the signal through a cable switching terminal. In one embodiment, the housing is configured in the shape of a streamlined pod and the housing surface is coated with an anti-fouling coating, and/or The u