6results about How to "Avoid measurement effects" patented technology

This application discloses a method, tooling, and assembly structure for measuring the roundness of large cylindrical or cylindrical structures, belonging to the field of industrial measurement technology. The measurement method includes: fixing multiple measuring toolings at corresponding positions at both ends of the workpiece; and determining the theoretical initial value R of the workpiece radius extension. 延长 Determine the coordinates of the predetermined points, such that the actual distance from each predetermined point to the center of the workpiece end circle is R. 延长 The method involves setting measurement lines and measuring the actual distance between each measurement line and the outer surface of the workpiece. The roundness of the workpiece is determined by its actual outer diameter. The measuring fixture includes a connected fastening assembly and a positioning assembly, with the positioning assembly equipped with a reflective plate for positioning predetermined points. The measuring assembly structure includes multiple measuring fixtures located at both ends of the workpiece. The measurement lines corresponding to the same equally spaced positions at both ends of the workpiece are parallel. This application measures the roundness of the outer surface of a large cylinder from the outside, significantly reducing the operational difficulty of the measurement, achieving higher measurement accuracy, and simplifying the measurement of the roundness of large cylinders.

The invention particularly relates to a combined detector for an online sipping device. The combined detector comprises a beta-ray detector, a gamma-ray detector and a signal processing system, the beta ray detector adopts a plastic scintillation chamber with a high beta / gamma response ratio; the gamma ray detector adopts a scintillation crystal; the signal processing system is configured to perform beta-gamma coincidence measurement on output signals of the beta-ray detector and the gamma-ray detector; the plastic scintillation chamber is adjacent to the scintillation crystal space, and the detection areas of the plastic scintillation chamber and the scintillation crystal space are at least partially overlapped so as to jointly detect the detected gas flowing through the plastic scintillation chamber. The invention further relates to a nuclear fuel assembly damage detection method which adopts the combined detector. According to the invention, comprehensive detection of beta and gamma rays of radioactive inert gas is realized, and efficient and sensitive measurement of beta rays in large-volume radioactive inert gas is realized, so that the efficiency and accuracy of gamma-beta coincidence measurement are improved.

This utility model discloses an integrated six-dimensional portable force measuring plate, including an elastomer and a protective assembly disposed outside the elastomer. The assembly includes a hub, a force-bearing platform, and multiple strain beams. The force-bearing platform is located in the center of the hub, and the hub and force-bearing platform are connected by multiple strain beams. Multiple strain gauges are attached to different positions on the strain beams. A through hole is formed in the center of the force-bearing platform, and a bridge plate for forming a Wheatstone bridge and a data acquisition board for collecting and converting the output signals of the elastomer are disposed within the through hole. Multiple wires are led out from the strain gauges and soldered to the bridge plate to form six Wheatstone bridges, which are used to detect forces and moments in three directions, denoted as Fx, Fy, Fz, Mx, My, and Mz. Advantages: The integrated force measuring plate eliminates the need for multiple sensor splicing; multiple beams can work together to balance the force and compensate for each other, reducing the influence of off-center loading on the measurement results; multiple force measuring plates can be spliced ​​together for use.

This invention provides an adaptive feedback adjustment method and system for the drawing take-up line of a stamping die. The method includes triggering a grating projection device to project a grating grid onto the drawing die, controlling an industrial camera to capture an image of the lower drawing die, receiving the image of the lower drawing die captured by the industrial camera, identifying edge feature points of the drawing line in the lower drawing die image, and fitting a drawing take-up line profile based on the identified edge feature points. The fitted drawing take-up line profile is then compared with a pre-stored standard drawing take-up line to determine if the profile contains any out-of-limit areas. This invention employs a unique online measurement method, enabling adjustment of the stamping die's drawing take-up line without stopping the machine. This system is applicable to all dies and saves significant process and production costs compared to existing measurement methods that require offline shutdown.

The utility model discloses an anti-salinity interference vanadium (III) reduced seawater nitrate analysis device, and relates to the field of analytical chemistry detection. Comprising an automatic sample injection module, a flow analysis module, a mixing-constant temperature module and a light splitting detection module, the flow analysis module comprises an injection pump, an injector and a multi-position selection valve; the multi-position selection valve is respectively connected with the automatic sample injection module, the pure water storage bottle, the sulfanilamide solution storage bottle, the N-(1-naphthyl) ethylenediamine hydrochloride solution storage bottle, the vanadium (III) solution storage bottle, the mixing-constant temperature module and the light splitting detection module through pipelines; the injector is connected with the multi-position selection valve, and the liquid amount is controlled through the injection pump.

The invention relates to the technical field of flow detection, and discloses a gas ultrasonic flowmeter signal processing method based on echo signal envelope fitting. According to the method, the parameterized mathematical model is adopted to carry out self-adaptive overall fitting on the envelope sequence of the ultrasonic echo signal, noise interference can be effectively suppressed, and the influence of waveform distortion on measurement can be overcome. According to the method, the propagation rule of the sound wave energy is restored from the noisy signal through the optimal fitting process, and the accuracy and repeatability of flight time extraction are improved. Due to the adoption of a nonlinear optimization algorithm with relatively high calculation efficiency, the real-time requirement of the system is considered while the measurement precision is ensured. According to the processing mode, the adaptive capacity of the gas ultrasonic flowmeter under the low signal-to-noise ratio working condition is enhanced, the long-term stability of metering is improved, a reliable flow measurement solution is provided for an industrial site, and the application potential of an instrument under the complex working condition is expanded.