9results about How to "Suppresses measurement errors" patented technology

The application discloses a kind of Delta robot hand-eye calibration methods based on 3D vision sensor, comprising the following steps: step one, system initialization and coordinate system establishment, the internal parameter calibration of 3D vision sensor is completed by establishing coordinate system;Step two, TCP contact measurement, contact calibration board corner point, record base coordinate and TCP coordinate, calculate mark point coordinate;Step three, orthogonal translation motion and data acquisition, orthogonal translation motion collects point cloud data before and after translation, and records TCP coordinate change;Step four, point cloud data processing and feature extraction, extract mark point coordinate from point cloud data, improve positioning accuracy;Step five, hand-eye matrix calculation, solve rotation matrix and translation vector, synthesis hand-eye matrix;The present application constructs standard orthogonal basis by using orthogonal translation motion, solves the fundamental problem that traditional hand-eye calibration equation cannot be solved, and improves mark point positioning accuracy by sub-pixel interpolation method based on area reciprocal weighting.

This invention provides a real-time adaptive 3D measurement system and method for objects based on microstructured light. The system includes: multiple optical measurement units arranged in an equidistant circular array along the circumference on a ring mounting frame and moving synchronously with a lifting and adjusting mechanism; multiple measurement posture acquisition units, a reference posture monitoring unit, a posture compensation unit, a control unit, a data fusion module, and a quality analysis module. According to this invention, the multiple optical measurement units arranged in a circular array enable multi-view synchronous measurement of the workpiece, avoiding the time consumption and reference conversion errors of traditional indexing measurement methods. The real-time posture monitoring and dynamic compensation mechanism effectively suppresses measurement errors caused by factors such as mechanical vibration and temperature drift, reducing posture-related measurement errors. The system achieves automation, real-time measurement, and high precision in 3D measurement, improving measurement efficiency and accuracy.

This application discloses a fully digital magnetic field measurement device and method, relating to the field of magnetic field measurement technology. The device generates a constant AC-DC superimposed current signal with adjustable frequency and amplitude, and outputs it to a Hall sensor placed in the magnetic field to be measured. It acquires the Hall voltage generated by the Hall sensor and performs analog-to-digital conversion to obtain a digital Hall signal. The digital Hall signal is quadrature demodulated to extract the in-phase and quadrature components. The magnetic field strength amplitude and phase are calculated based on the in-phase and quadrature components. The current is sampled in real time, and a closed-loop control signal is generated based on the deviation between a preset target current value and the actual sampled value to adjust the AC-DC superimposed current amplitude. Through a fully digital signal processing architecture and closed-loop control and output, high-precision, high-speed, and low-noise measurement of magnetic field strength and direction is achieved.

The application provides a kind of blade vibration parameter test method based on blade tip timing signal, it is related to mechanical blade vibration technical field, comprising the following steps: real-time acquisition of the rotational speed function dynamically constructed by rotational speed sensor signal, calculate the theoretical arrival time of each pulse, obtain the arrival time difference caused by blade vibration, calculate the vibration displacement of blade under the current rotational speed fluctuation condition;According to the rotational speed function, the theoretical instantaneous speed of blade passing through the sensor is calculated, the corresponding theoretical pulse width is obtained, the pulse width deviation caused by blade vibration is obtained, and the vibration speed of blade under the current rotational speed fluctuation condition is calculated;Vibration displacement and vibration speed are integrated into multi-measurement vector sparse reconstruction model and jointly solved, and the sparse frequency support set is recovered, to obtain the frequency parameters of blade vibration;Self-adaptive adjustment of the regularization parameter in block sparse bayesian learning method, and the frequency and amplitude of blade vibration are output using the adjusted parameter.

This invention relates to the field of dynamic disturbance measurement technology, specifically to a method and apparatus for measuring vertical dynamic disturbance of high-speed railway bridges. The method involves taking a subsequence at each sampling moment in the vertical displacement time series at a key section of the bridge, using a sliding window centered on that moment, and identifying local extreme points. The extreme point density and amplitude dispersion are determined based on these local extreme points. The extreme point density and amplitude dispersion are processed to obtain normalized distortion. An adaptive threshold is constructed based on the normalized distortion. The sequence or the unprocessed residual components from the previous decomposition are used as the signal to be decomposed, and iterative sieving is performed to extract intrinsic mode functions (EMFs). Each sieving iteration calculates the local deviation. If the local deviation is less than the adaptive threshold and meets preset constraints, the iteration terminates and the EMF is output. The obtained EMFs are used to reconstruct the signal, resulting in the vertical dynamic disturbance waveform, thereby improving the accuracy of vertical dynamic disturbance measurement.

This invention belongs to the field of intelligent speed ratio control technology, specifically relating to an intelligent speed ratio control method for seabed probe penetration, comprising the following steps: real-time acquisition of multi-dimensional detection data during the probe's descent and penetration; calculation of the real-time speed ratio based on the multi-dimensional detection data, and real-time identification of four types of strata—soft clay, hard clay, loose sand, and dense sand—in conjunction with formation response parameters; dynamic adjustment of PID parameters through a fuzzy PID controller based on the deviation between the real-time speed ratio and the target speed ratio and its rate of change, outputting the penetration rate adjustment amount, and real-time correction of the target speed ratio according to pore water pressure; closed-loop execution of rate adjustment, cyclically implementing intelligent decision-making until penetration is completed. This invention effectively improves the continuity and reliability of exploration operations under complex deep-sea geological conditions, can adaptively adjust penetration parameters, and significantly shortens the single-hole penetration operation time while ensuring data quality and equipment safety, thereby improving the overall efficiency of offshore exploration operations.

The application discloses a signal output circuit and method, and belongs to the technical field of electronic circuits. The circuit comprises: a first operation circuit configured as a same-phase proportional attenuation circuit, which is used for attenuating a power supply voltage by a first fixed proportion to generate a reference voltage; a signal processing unit, whose power supply end and reference end are both connected to the reference voltage, which is used for processing an input signal to generate an intermediate output signal; and a second operation circuit configured as a same-phase proportional amplification circuit, which is used for amplifying the intermediate output signal by a second fixed proportion to generate a final output signal. The two operation circuits adopt operation amplifiers of the same specification, and the two fixed proportions are reciprocal. The application constructs a symmetrical proportional scaling link, so that the final output signal is proportional to the power supply voltage in real time and accurately, thereby adapting to wide-range power supply voltage changes, and stability and anti-interference capability are improved.

The application discloses a kind of line array camera proportion coefficient and translation amount calibration method based on rotating platform, belong to machine vision calibration technical field.Method includes: through line array camera acquisition synchronous following rotating platform rotation's calibration board image, each line image of line array camera acquisition and rotating platform's rotation angle one-to-one correspondence;Calibration board is circular and at least 2 groups of round holes are set, the position of round hole is symmetrical relative to the center of calibration board and physical size is known;According to the physical size of round hole on calibration board and the pixel size of round hole in image, the proportion coefficient of line array camera is calculated;Using rotation angle and the center of round hole in the conversion relationship between rotating platform coordinate system and camera coordinate system, solve horizontal axis translation and vertical axis translation;The application does not need to accurately align the center of calibration board and rotating platform center, and the calibration process is simple, efficient, with the advantages of good robustness, high precision.

The invention relates to a special-shaped passive magnetic shielding system of a miniaturized atomic spinning gyroscope, which is beneficial to improving the magnetic shielding effect and the uniformity of an internal magnetic field through the design of a special-shaped high-shielding-factor shielding layer, and provides reliable technical guarantee for the implementation of a high-precision gyroscope, and is characterized by comprising the following steps of: defining a special-shaped space in the special-shaped high-shielding-factor shielding layer; the special-shaped space comprises a columnar cavity, an upright frustum-shaped cavity and an inverted frustum-shaped cavity, wherein the upright frustum-shaped cavity is contracted from an upper opening of the columnar cavity to an upper extending edge, and the inverted frustum-shaped cavity is contracted from a lower opening of the columnar cavity to a lower extending edge.