Zero Consistency Calibration Method for Offshore Devices Based on Wireless Transmission Network

Abstract

The invention discloses a zero consistency correction method for an offshore device based on a wireless transmission network, and belongs to the field of zero correction methods for the offshore devices. The correction method comprises the following steps: (1) calculating a calibration standard parameter of a CCD image sensor in each channel; (2) calculating frame position information to be adjusted of each channel in a multi-channel image; (3) adjusting frame positions of each channel to enable the cross aim point of each channel to be overlapped with the central mass point of a target; and (4) selecting a reference channel, and correcting equipment in other channels. According to the correction method disclosed by the invention, the CCD image sensor is adopted to capture target information; a target identification module of a main control end calculates relative coordinates of the target, and a theodolite detects an angle of the target; and by adjustment of the frame position information of all the channels, zero consistency correction of the offshore device is realized. The correction method has a low requirement on external conditions, and the correction precision is improved.

Description

technical field [0001] The invention belongs to the field of zero position correction methods for offshore devices, in particular to a method for correcting zero position consistency for offshore devices based on a wireless transmission network. Background technique [0002] The zero consistency correction of each system of offshore installations is an important basis for accurate tracking of targets. With the rapid development of science and technology, various system platforms of offshore installations have diversified development, the use environment is more complex and harsh, and the system debugging cycle is shorter. It is more difficult to correct the zero position consistency of each system of the offshore device. [0003] The traditional zero consistency correction is the star-pointing method. The star-pointing method is to select the reference zero position device and the optical device on the tested device to aim at a certain star in the sky at the same time. The d...

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Problems solved by technology

[0003] The traditional zero consistency correction is the star-pointing method. The star-pointing method is to select the reference zero position device and the optical device on the tested device to aim at a certain star in the sky at the same time. The disadvantages of this method are: 1) The hull must remain absolutely still: The star aiming method selects a star at infinity as the target. When multiple devices aim at it at the same time, it can be considered that the optical axes of the devices are completely parallel, so as to complete consistent calibration. However, in actual operation, the hull shakes, and it is difficult to ensure that all The equipment is aimed at a star at the same time, so there are strict requirements on the mooring environment and climate environment of the ship during calibration. It is required that the ship is in a mooring state, without the influence of wind and waves, and the weather is clear at night, and the Polaris is clearly visible; 2) Traditional The accuracy of the star-pointing method is limited: the rigidity of the light hull is low, and it is prone to certain deformations, and the horizontal accuracy of equipment such as star-pointing sensors is low, and it is difficult to meet the coordinate system and deck of the traditional star-pointing method on the weapon system. Due to the parallel requirement of the plane coordinate system, the traditional star aiming method has limitations in accuracy; 3) The star aiming method is manually aimed at the star: there is no image or video record during the calibration process, which is inconvenient for later error analysis

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