7results about How to "Reduce calibration workload" patented technology

This invention discloses a method for constructing a multi-layered assembly of engine room sections and a ship constructed using the same method. The method includes the following steps: S1, manufacturing engine room sections and pre-assembling them off-site to form pre-assembly engine room sections; S2, painting the pre-assembly engine room sections in a painting workshop; S3, transporting the pre-assembly engine room sections and assembling them locally to form the complete engine room section; S4, mounting the complete engine room section onto the ship's hull via a dry dock. This method can reduce manufacturing costs and difficulty. Off-site pre-assembly and integrated painting improve site utilization efficiency. Through simulation prediction, inverted manufacturing of engine room sections and application of reverse pre-compensation can reduce corrections. By setting up inverted welding of engine room sections, no additional scaffolding is needed, reducing costs. By setting up the flipping of engine room pre-assembly sections, the number of flipping and lifting / disassembling operations is reduced. By aligning the joints in the longitudinal direction, structural continuity and assembly accuracy are ensured.

A kind of full strapdown millimeter wave phased array radar system pointing calibration method, main steps include: to be calibrated system is installed on three-axis turntable, based on the set calibration range and calibration granularity, calculate t time antenna azimuth beam pointing angle and elevation beam pointing angle theoretical value, and corresponding turntable attitude angle theoretical value, control turntable turns to the angle;Adjust phased array antenna beam pointing, so that target is located in the antenna beam center, obtain the actual value of antenna azimuth beam pointing angle and elevation beam pointing angle at this time, with the difference between the beam pointing theoretical value and actual value as the pointing error of phased array at the angle, to complete the calibration test of all angles in calibration range.This is a kind of high-efficiency calibration test method at system level, without accurately determining the coordinate position of each array element of antenna, can take into account the influence of system each link error on beam pointing precision, realize the fast, high-precision high-speed full strapdown millimeter wave phased array test calibration.

The present disclosure relates to the technical field of light field wavefront sensing, and particularly relates to a method for calibrating a multi-space sampling rate response matrix of a deformable mirror, which adopts a checkerboard algorithm to obtain a response matrix of the highest space sampling rate; receives a user input of a wavefront target space sampling rate, calculates a down-sampling window size of the response matrix of the highest space sampling rate; down-samples the response matrix of the highest space sampling rate to generate a slope vector of the target space sampling rate, and performs a slope consistency evaluation within the down-sampling window, judges whether the wavefront target space sampling rate is suitable for the current wavefront distribution according to the evaluation result; and splices the slope vectors of all the wavefront target space sampling rates to generate a response matrix of the target space sampling rate. Only a single execution of the calibration of the highest space sampling rate is required, and the response matrix of the target space sampling rate can be generated as required, thereby reducing the calibration workload and improving the system efficiency.

The application relates to an active vibration control method and system adopting a polar analytic cascade least mean square algorithm, and belongs to the technical field of adaptive active vibration control. The method comprises the following steps: measuring a reference vibration signal and a residual vibration signal; wherein the reference vibration signal is measured at a position where the control force of an actuator does not directly act, and the residual vibration signal is measured in a vibration control area where the control force of the actuator acts; inputting the reference vibration signal into a main LMS to obtain a main output; inputting the main output into a first auxiliary LMS and a second auxiliary LMS in sequence, the first auxiliary LMS and the second auxiliary LMS are connected in a cascade mode, and the residual vibration signals with a first polarity and a second polarity opposite to the first polarity are respectively used as error signals for updating; and combining the outputs of the first auxiliary LMS and the second auxiliary LMS to obtain a control signal, which is used for driving the actuator to reduce the residual vibration. The application can automatically analyze the phase and polarity uncertainty of a secondary path without explicitly identifying the secondary path or manually switching the sign.

The application relates to the technical field of intelligent devices, and discloses a method and device for clothes image retrieval and an equipment. The method comprises the following steps: obtaining a to-be-retrieved picture comprising clothes to be retrieved; determining a tonal image corresponding to the to-be-retrieved picture; inputting the to-be-retrieved picture into a configured first convolutional neural network (CNN) model to obtain an activated area of a set area of the clothes to be retrieved, wherein the activated area corresponds to the maximum convolution feature value; extracting tonal feature information of the clothes to be retrieved from the tonal image according to position information of the activated area; and retrieving a matching clothes image matched with the clothes to be retrieved according to the tonal feature information. In this way, the color calibration workload in the clothes matching process is reduced, and the cost of clothes matching is reduced.

The embodiment of the invention discloses a digital key calibration method, which comprises the following steps of: monitoring attitude information of a digital key to be calibrated and azimuth information of the digital key relative to a vehicle machine in real time, guiding the digital key to reach each sampling point in a pre-planned static sampling point set according to a preset sampling sequence and the attitude information and the azimuth information of the digital key, and acquiring static RSSI calibration data of each sampling point; the attitude information comprises a roll angle, a pitch angle and a yaw angle; and monitoring attitude information and motion information of the digital key in real time, and regularly acquiring dynamic RSSI calibration data between the digital key and the vehicle machine according to a pre-planned dynamic sampling path and preset dynamic attitude motion conditions. Therefore, the inertial measurement unit is utilized to guide and position the sampling point, tedious manual measurement and positioning are avoided, automatic acquisition of calibration data can be realized, the calibration efficiency can be improved, and the calibration workload can be greatly reduced.

The utility model discloses an automatic grab calibration system, including the placement platform of the calibration rod subassembly of resting, install the base of mechanical arm unit, install the scanning device and grab mechanism on the mechanical arm unit end and compare the calibration support for installing comparison board, and the comparison board is equipped with the department of holding in reserve on the calibration rod subassembly, be equipped with the adapter flange and the outer skeleton on the mechanical arm unit, the outer skeleton hollow design, one end of outer skeleton is fixed on the mechanical arm unit through the adapter flange, and the other end fixed connection scanning device of outer skeleton, grab mechanism installs in the hollow outer skeleton, and be equipped with the through slot of the department of holding in reserve for the department of holding in reserve in the inside of the hollow area of the hollow outer skeleton in the outer skeleton. Through setting up the hollow outer skeleton, install scanning device with the hollow outer skeleton end, install grab mechanism with the hollow cavity of the hollow outer skeleton, install scanning device and grab mechanism on the same outer skeleton, can effectively reduce weight and reduce cost, and the manufacturing cost is also more bottom.