7 results about "Wave measure" patented technology

A wave spectrum calculation method based on GNSS wave measuring buoy is provided, which includes: placing GNSS drift buoys in the sea, collecting buoy position data; then obtaining three-dimensional velocity data of ocean waves; performing high pass filtering on velocity data of a sliding window to remove noise signals and trend terms, retaining wave motion data; calculating a cross spectrum and wave direction spectrum. The present disclosure solves limitations of traditional GNSS measurement methods applied to ocean buoy wave measurement, such as limited observation distance, high cost, tedious measurement and average calculation accuracy, and a need for correction services. The measurement accuracy is high and no additional correction services are required, which is more suitable for wave measurement, the wave spectrum algorithm in this method can adapt to more complex observation environments and incorporate results of a velocity measurement algorithm into a matched wave spectrum algorithm.

The application discloses a pressure type wave measuring instrument metering calibration device and method, relates to the technical field of hydrological measuring instrument calibration, and comprises the following steps: a wave simulation device drives a lifting platform to make periodic lifting movement according to a set wave height and a wave period, wave height measurement values of the pressure type wave measuring instrument and water depth measurement values of an echo sounder are collected; the water depth measurement values are converted into water depth standard values according to a correction value fitting function of the echo sounder; wave height standard values are calculated from the water depth standard values of each period, and an arithmetic average value is obtained as a standard wave height; the wave height measurement values are subjected to arithmetic averaging, and the difference between the arithmetic average value and the standard wave height is a wave height indication error. The lifting platform is driven to move again, a time interval corresponding to adjacent wave crests or troughs collected by the pressure type wave measuring instrument is taken as a wave period measurement value, a time interval corresponding to adjacent movement turning points of the lifting platform is taken as a wave period standard value, arithmetic average values are respectively obtained, and a difference value is taken as a wave period indication error.

The invention discloses a vibration monitoring system and method for an offshore wind power platform. The monitoring system comprises a sea wave measuring device and a vibration measuring device. The sea wave measuring device comprises a floating support and a wave measuring mechanism. The vibration measuring device comprises a control unit, a cantilever support, a vibration measuring mechanism, a horizontal adjusting mechanism, a temperature adjusting mechanism and a waterproof shell. According to the vibration monitoring system, the levelness of the vibration measuring mechanism is automatically adjusted and recovered through the horizontal adjusting mechanism, so that the levelness of the vibration measuring mechanism can be kept in the long-term autonomous operation process, and manual maintenance on an offshore wind power platform is not needed regularly; wave parameters can be obtained through the wave measurement mechanism, so that vibration influence data are collected together, and the measurement precision is improved in the subsequent vibration measurement data analysis process.

The application discloses a kind of unmanned aerial vehicle wave measuring system reliability test platform of dual-mode wave simulation, comprising: water tank type wave simulation system, wind making system, support and reversing system, column type wave simulation system and test environmental parameter acquisition system;Water tank type wave simulation system is used to simulate the wave condition of small wave height range required by unmanned aerial vehicle wave measurement, column type wave simulation system is used to simulate the wave condition of large wave height range, by support and reversing system, the wind field of wind making system can be selectively adjusted to act on the first test area above water tank type wave simulation system or act on the second test area above column type wave simulation system.The test platform can safely, economically and controllably simulate sea state conditions, effectively and comprehensively cover the wave height range of target sea state, and can collect wave true value data and unmanned aerial vehicle wave measurement data to complete the quantitative verification of unmanned aerial vehicle wave measurement system reliability.

The application discloses a series-parallel composite offshore binocular wave measuring device, and aims at solving the problems that the existing offshore wave data measuring device is in series connection or parallel connection, the series connection is difficult to meet the high load requirement, and the parallel connection is limited in the motion range. The yaw module is fixed on the top plate of the pitch-roll composite module, and the visual camera module is fixed on the rotary bearing of the yaw module. The yaw module realizes the motion compensation of the heading angle, the pitch-roll composite module is a two-degree-of-freedom parallel mechanism, and realizes the motion compensation of the roll angle and the pitch angle. The yaw module and the pitch-roll composite module form a series connection, and the two electric cylinders in the pitch-roll composite module and the stand constitute a parallel connection. The overall series-parallel composite relationship can interact to compensate the angular displacement in the pitch, roll and yaw directions, so that the binocular wave measuring visual camera can stably measure waves at sea, adapt to the offshore operation environment, and acquire clear wave photos in real time.

The invention discloses a wave energy power generation device body installation type real-time sea condition identification method. The method comprises the following steps: a data acquisition step: a pressure wave meter measures pressure change information in real time; the attitude sensor measures attitude information in real time; the gravity type wave measuring buoy measures the real-time effective wave height; a model establishment step: establishing a sea condition neural network model by a data processing unit, and establishing a mapping relationship between the pressure change information and the attitude information at each time and the significant wave height at the same time by the data processing unit; a model using step: inputting pressure change information and attitude information into the sea condition neural network model in real time so as to automatically output significant wave height; and attitude control: the device control system automatically controls the attitude of the wave-absorbing floater according to the output effective wave height. By adopting the above arrangement, the defect that the effective wave height is not accurately measured by a pressure wave meter due to the influence of high sea conditions is overcome, the effective wave height can be accurately measured under different sea conditions, and automatic control of the attitude of the wave absorbing floater is facilitated.

The invention discloses an ocean telemetering wave height meter and a wave measurement method, the ocean telemetering wave height meter comprises a wave buoy system and a shipborne measurement and control system, the wave buoy system is provided with a buoy, an acceleration sensing measurement unit and a three-axis holder self-stabilizing device, and the acceleration sensing measurement unit is arranged on the buoy through the three-axis holder self-stabilizing device; the plane where the acceleration sensing and measuring unit is located is always kept perpendicular to the horizontal plane through the three-axis holder self-stabilizing device, the acceleration sensing and measuring unit is used for measuring acceleration signals in the vertical direction of the wave buoy and transmitting the acceleration signals to the shipborne measuring and controlling system, and the shipborne measuring and controlling system is provided with a man-machine interaction interface. And the man-machine interaction interface is used for converting the obtained acceleration signal into displacement through quadratic integration to obtain a characteristic value H1 and a period T1 of the wave buoy and displaying the characteristic value H1 and the period T1. The plane where the accelerometer is located is kept perpendicular to the horizontal plane all the time through the three-axis holder, the principle is simple, implementation is convenient, and marine navigation safety and development and detection of marine resources are further guaranteed.