5results about How to "Improve measurement repeatability" patented technology

The present application relates to the technical field of profile measurement, and particularly relates to a pipe blank inner profile measurement device and a measurement method. The pipe blank inner profile measurement device comprises a pipe blank supporting mechanism, a cantilever mechanism, a laser measurement module, a rotation angle measurement module and a data acquisition and control system. The pipe blank supporting mechanism is used for supporting and positioning the pipe blank. The cantilever mechanism comprises a cantilever. The laser measurement module is used for entering the pipe blank to obtain ranging data under the driving of the cantilever. The rotation angle measurement module is used for obtaining the rotation angle data of the laser measurement module. The data acquisition and control system is used for obtaining the inner profile data of the pipe blank to be measured based on the ranging data and the rotation angle data. The present application is a non-contact measurement method, which does not cause damage to the surface of the measured object, is suitable for the measurement of precise parts and fragile materials, and can automatically complete the data acquisition, processing and analysis of the measurement process through the integrated data acquisition and control system, and the measurement efficiency is high.

This invention relates to the field of transducer technology, specifically to an integrated coupled piezoelectric ultrasonic transducer, comprising an aluminum alloy cylindrical shell; silver-impregnated electrodes on both the upper and lower surfaces of the sensing unit, which simultaneously excite longitudinal and transverse waves under high-voltage pulse excitation; a backing damping block for absorbing reverse sound waves and improving signal clarity; a stainless steel bottom cover fixed to the open end of the shell and tightly coupled to a piezoelectric ceramic sheet, serving as protection and sound wave transition; an integrated coupling layer consisting of a flexible solid coupling sheet pre-attached to the outside of the stainless steel bottom cover; and a magnetic fixing ring, a ring-shaped neodymium iron boron permanent magnet embedded in the shell, for providing attraction force to the ferromagnetic bolts to stabilize the coupling pressure. Its advantages include: extremely simplified structure, compact size and light weight, low cost, elimination of measurement errors, improved measurement repeatability, and greatly simplified on-site operation procedures.

The application discloses an oil saw guide plate flatness and groove wear image measurement method and system, relates to the technical field of machine vision image measurement, and the method obtains guide plate multi-source fusion image data through the cooperative collection of a line laser projection and coaxial light source illumination, calculates the flatness deviation by using three-dimensional point cloud reconstruction and reference plane fitting, adopts sub-pixel edge detection and multi-section statistical measurement to quantize groove wear parameters, fuses the flatness and groove wear indexes to calculate a comprehensive wear index and output a grading maintenance suggestion, and automatically generates a detection report, thereby providing an objective quantitative basis for oil saw guide plate quality detection.

This invention belongs to the field of flowmeter technology and discloses a method for optimizing the impeller of a turbine flowmeter. The method includes: S1: collecting data on the physical properties, operating range, and performance indicators of the medium through a system to establish clear design constraint data; S2: integrating streamlined and multi-lead design concepts, and determining the blade structural parameters through mathematical modeling and simulation analysis; S3: ensuring precise matching between the processing process and design objectives through parameter modeling, accuracy threshold setting, process coordination, and data linkage; S4: manufacturing an impeller prototype based on the processing technology, and calibrating the blade size and angle parameters using equipment; S5: verifying linearity and starting flow rate indicators through data acquisition and analysis, and iteratively optimizing design and processing parameters; S6: establishing a large-scale batch production process based on the optimized final parameters. This invention solves the problems of large starting flow rate, poor linearity, and insufficient consistency of metering accuracy in turbine flowmeters under low Reynolds number conditions.

This invention discloses an intelligent shoulder joint range of motion measurement system and method based on multi-sensor fusion, comprising a hardware measurement unit and a smart terminal communicatively connected thereto. The hardware measurement unit includes: a trunk sensor module for fixing to the user's trunk to acquire trunk posture data; an upper arm sensor module for fixing to the upper arm on the same side as the shoulder being measured to acquire upper arm posture data; and a data processing and communication module electrically connected to the trunk sensor module and the upper arm sensor module, respectively, for receiving and processing the trunk posture data and the upper arm posture data, calculating the spatial relative posture angle of the upper arm relative to the trunk, and wirelessly transmitting the spatial relative posture angle to the smart terminal. This invention addresses the long-standing pain points of traditional goniometers in clinical practice, such as strong subjectivity, cumbersome operation, and inability to record dynamic processes.