3results about How to "Eliminate nonlinear errors" patented technology

This invention discloses a point cloud data correction method and related lidar, apparatus, program, and equipment. The method includes: determining the corrected field-of-view position information based on a pre-constructed temperature-distortion model, temperature data from the lidar receiving lens, and the field-of-view position information corresponding to the original measured point cloud data; and reconstructing three-dimensional point cloud data based on the corrected field-of-view position information and the point cloud data. This method enables real-time dynamic correction of the angle value of each laser ranging point during the online operation of the lidar. It eliminates nonlinear angle measurement errors introduced by temperature changes, especially the amplification of light rays at the edge of the field of view due to thermal expansion and contraction at large field-of-view angles, from the data source. It effectively suppresses the bending, twisting, or drifting of straight objects in the point cloud image at the edge of the field of view, thereby improving the point cloud output accuracy and coordinate reliability of the wide-angle blind-spot lidar under all temperature conditions.

This invention relates to the field of engineering machinery control technology and discloses a method for controlling the movement of counterweights in lifting equipment. The method includes establishing a multi-source heterogeneous data stream, simultaneously acquiring macroscopic operating status data of the lifting equipment and internal stress data of the slewing bearing, reconstructing the load field using the stress data and inverting the actual support reaction moment vector, and simultaneously constructing a virtual rigid body equilibrium model based on the macroscopic data to calculate the theoretical overturning moment vector. By calculating the vector deviation between the two, the structural stiffness factor characterizing the equipment's deformation resistance and the foundation settlement factor quantifying the ground bearing capacity are decoupled and obtained. Based on these factors, the target parameters of the counterweight are determined, and the counterweight telescopic hydraulic cylinder and the luffing winch are jointly driven to adjust the counterweight position. This invention distinguishes between structural deformation and foundation settlement risks through dual-parameter decoupling, achieving dynamic and precise adjustment of the counterweight's center of gravity in two-dimensional space, effectively improving the operational safety of cranes under complex working conditions.

The utility model belongs to detection circuit technical field relates to a kind of nonlinear temperature drift dynamic bias detection circuit of vehicle-mounted audio power amplifier, including PTAT circuit, NTC circuit, A2B bus, difference operational amplifier circuit, voltage divider network, audio signal amplification circuit and its connection relationship.The utility model carries out mixed temperature detection by integration PTAT circuit and NTC circuit, then carry out difference design to eliminate non-linear error, generate compensation voltage V comp , temperature sampling of multiple temperature nodes is triggered by A2B bus protocol synchronization signal, temperature sampling and audio data time domain alignment are realized, and compensation voltage V comp It is injected into the voltage divider network of MP7722DF power amplifier chip REF pin, and bias voltage dynamic detection is realized.