34results about How to "With non-contact measurement" patented technology

The invention relates to a reference signal constraint-based mechanical characteristic acoustic signal frequency-domain semi-blind extraction method, and belongs to the technical field of operation maintenance of mechanical equipment. The method comprises the following steps: constructing a multi-scale morphology filter for a failure signal characteristic on the basis of a dynamic particle swarm algorithm with higher global optimization capability, and maximally weakening background noise interference; constructing a reference signal in combination with structural parameters of a mechanical part, and further performing complex component blind separation band by band by virtue of a unit reference signal constraint semi-blind extraction method; solving order uncertainty problems to obtain a separated and restored source signal to finally realize the extraction and separation of the mechanical failure characteristic signal by virtue of the improved KL distance between complex components. Different from vibration monitoring requiring the mounting of a sensor on the surface of mechanical equipment, acoustic monitoring only requires the placement of 1 to 2 microphones around the equipment, and then the failure characteristic signal can be extracted from a picked up mechanical acoustic signal for further failure source positioning.

A non-contact online measurement method of boiler main steam pipeline macroscopic displacement comprises the following steps: 1, establishing a spatial coordinate system of a pipeline center line and elastic support hangers; 2, simplifying the elastic support hangers into an upper rigid rod, a lower rigid and a middle spring, and respectively setting two marking points on the lower rigid rod; 3, arranging a high-definition camera, and connecting a main control computer through a wireless bridge; 4, acquiring the spatial coordinates of the marking points in the coordinate system through adopting a three dimensional reconstruction algorithm; 5, acquiring the coordinates of the marking points after creep deformation; 6, establishing the linear equation of the lower segment of the elastic support hangers; and 7, combining the linear equation with the curve equation of the external surface of the boiler main steam pipeline to obtain the coordinate of an intersection point B' of the linear l1 equation and the external surface of the boiler main steam pipeline, and accurately calculating the macroscopic displacement of the pipeline in every direction after taking regard of errors. High-stability and high-precision pipeline macroscopic displacement is obtained in an online non-contact manner.

The invention discloses a small pipeline gas-liquid two-phase flow phase distribution optical detection system and method. The method comprises the following steps: firstly, irradiating a measured gas-liquid two-phase flow from two mutually vertical directions by adopting two sheet-shaped light beams, and synchronously measuring light intensity distribution generated by the measured gas-liquid two-phase flow; then, in combination with light intensity distribution data when the pipeline is filled with the liquid phase, extracting required light intensity distribution characteristic quantity from a measurement result; secondly, establishing a measurement model about small pipeline section phase distribution parameters and light intensity distribution characteristic quantity based on a geometrical optics principle, and realizing gas-liquid phase distribution measurement of the pipe section by utilizing experimental data; and finally, further realizing gas-liquid phase distribution reconstruction and liquid film thickness estimation of the gas-liquid two-phase flow based on multiple groups of phase distribution measurement results. The system has the advantages of non-contact / non-invasive measurement, high time / space resolution, simple device structure and the like; and the method is based on the geometrical optics principle, and an effective and convenient new way is provided forobtaining the section gas-liquid phase distribution information of the gas-liquid two-phase flow of the small pipeline.

The invention relates to an all-fiber laser detection system and working method for tunnel safety monitoring, belonging to the technical field of tunnel safety monitoring. The system includes a laser, and an optical fiber beam splitter 1 is arranged on the output optical path. To the fiber splitter 2 and the fiber modulator, the output of the fiber modulator is connected to the fiber splitter 3; the two outputs of the fiber splitter 3 are respectively connected to the fiber combiner 1 and the fiber combiner 2; the fiber splitter One output of the fiber optic 2 is connected to the fiber combiner 1 through the fiber circulator, and the other output of the fiber splitter 2 is connected to the fiber combiner 2 through the fiber coupling head; the fiber combiner 1 is connected to the optical fiber combiner 1 through the photodetector 1 The data acquisition processing and control system, the optical fiber beam combiner 2 is connected to the data acquisition processing and control system through the photodetector 2. Gas measurement and displacement deformation measurement can be realized at the same time; gas measurement sensitivity is high, and displacement deformation measurement accuracy is high.

The application belongs to the technical field of compressors, in particular to a three-stage supercharged zero-gap ionic liquid compressor with real-time adjustable phase difference. The ionic liquid compressor uses ionic liquid to generate high pressure, but the existing ionic compressor uses 5-stage compression, the structure is relatively complicated, the processing is difficult and the cost is expensive. The application provides a three-stage supercharged zero-gap ionic liquid compressor with real-time adjustable phase difference, which includes a hydraulic mechanism and a gas booster mechanism connected to each other; the gas booster mechanism includes a first-stage gas booster assembly, a second stage The first-stage gas booster assembly and the third-stage gas booster assembly, the first-stage gas booster assembly is connected to the hydraulic mechanism through the first reversing assembly, the second-stage gas booster assembly is connected to the hydraulic mechanism through the second reversing assembly, The third-stage gas pressurization assembly is connected through the hydraulic mechanism of the third reversing assembly. Simple structure, convenient processing, high control precision, low energy consumption, zero clearance volume, strong versatility, no hydrogen pollution, and low cost.

The invention relates to a flexible support based torque calibration and measurement device. Left and right scale pans used for hanging of weights are symmetrically mounted on two sides of a standard torque beam through elastic pieces. A rotation center 'O' of a flexible support coincides with a central axis 'Y' of the standard torque beam. A laser displacement sensor mounted on a base is arranged below the lower end face of the standard torque beam. Left and right electromagnetic torquers are symmetrically mounted on two sides of the lower end face of the standard torque beam. On the condition of a torque load, the laser displacement sensor transmits measured electric signals of displacement variation, of a laser sensor probe and a standard torque lower end face, caused by the torque load to the left electromagnetic torquer or the right electromagnetic torquer after the electric signals are processed by a measuring circuit so as to control the left electromagnetic torquer or the right electromagnetic torquer to generate electromagnetic force to level the standard torque beam. The flexible support based torque calibration and measurement device has the advantage that measurement precision is improved to the utmost by comprehensive measures such as an electromagnetic force equilibrium system, the high-precision laser displacement sensor and a rapid signal tracking and measuring system.

The invention discloses a mining ultrasonic pipeline flow measuring device and a measuring method. The device includes a control module, a time-to-digital conversion module, a pulse drive module, a transmitting ultrasonic transducer, a receiving ultrasonic transducer, an analog switch module, a signal conditioning module, a communication interface module and a power supply module; The conversion module is connected, the time-to-digital conversion module is connected to the pulse drive module, the output end of the pulse drive module is connected to the transmitting ultrasonic transducer; the analog switch module is respectively connected to the transmitting ultrasonic transducer and the receiving ultrasonic transducer, and the control module controls the analog The switch module selects to receive the signal of the receiving ultrasonic transducer; the receiving ultrasonic transducer is connected to the signal conditioning module, and the output end of the signal conditioning module is connected to the time-to-digital conversion module; the communication interface module is connected to the control module. The invention has the advantages of high integration, low power consumption and high reliability.

The invention discloses a three-dimensional image measurement method, electronic equipment, a storage medium, and a program product, wherein the three-dimensional image measurement method includes the steps of: performing feature extraction on a medical image scanned by a scanning device; and performing image matching on the medical image after feature extraction ; Calibrate the scanning device to determine the internal parameters of the scanning device; perform three-dimensional reconstruction of the medical image according to the internal parameters of the scanning device to obtain a three-dimensional image; project the three-dimensional image onto the two-dimensional image, and according to the three-dimensional space point The mapping relationship with the two-dimensional image points calculates the size of the target area. The present invention realizes real-time measurement of three-dimensional images by extracting image feature information, image matching, calibration, reconstruction, and measurement, and has the characteristics of high precision, good stability, non-contact measurement, etc., and is a high degree of automation practical measurement method.

The invention discloses a non-conducting medium film thickness online detecting device of a coplane capacitive sensor. The non-conducting medium film thickness online detecting device comprises a detecting circuit, a data collecting card, an interface converter and a computer. The detecting circuit comprises a measuring exciting circuit, a reference capacitor, a main amplifier, a sensor measuring capacitor, a signal demodulator circuit, a signal separating circuit and a correcting amplifying circuit. The non-conducting medium film thickness online detecting device has the advantages of being good in adaptability, free of radial pollution, good in dynamic response, capable of achieving non-contact measuring, small in self temperature coefficient and the like and has wide application in online measuring of the non-conducting medium film thickness.