6results about How to "Simple measuring principle" patented technology

The invention discloses a high-resolution angular displacement absolute measurement method and device based on color coding imaging, belongs to the technical field of photoelectric angular displacement measurement, and aims to solve the problems in the prior art. A stepping motor of the device is connected with the center of the back of a circular coded disc, and a bearing of the stepping motor rotates to drive the circular coded disc to rotate; the laser light source and the high-speed CCD camera are placed right in front of the circular coded disc, and the high-speed CCD camera, the stepping motor and the center of the circular coded disc are coaxially placed and are connected with the PC terminal; laser emitted by the laser light source is vertically incident on a coded disc outer ring RGB color block on the front surface of the circular coded disc to form a laser circular light spot as a target detection point; when the stepping motor rotates, the high-speed CCD camera shoots the circular coded disc in real time to obtain a coded disc image signal with a target detection point; and the high-speed CCD camera shoots and stores the image signal in real time and uploads the image signal to the PC terminal for specific demodulation of rotation angle information. The device and the measurement method thereof have the measurement advantages of higher precision and high resolution.

The invention belongs to the technical field of measurement of a flow field in a combustion chamber, and particularly discloses a low-emission gas turbine combustion chamber flow field simulation experiment test method which is used for performing experiment test on the vertical direction of the central axis of a swirler so as to obtain flow field characteristics of an outlet of the swirler and a head of the combustion chamber. According to the invention, a PIV test system is adopted to perform experimental test on the flow field of the coaxial staged combustion chamber of the engine, and at present, related research reports at home and abroad are few; and 2, carrying out numerical calculation on the flow field characteristics of the coaxial staged combustion chamber of the engine by coupling the constructed simplified natural gas chemical reaction mechanism and the CFD calculation model. The research results can provide theoretical basis and technical support for revealing the flow field characteristics in the coaxial staged combustion chamber of the natural gas turbine and optimizing the structure and performance of the combustion chamber. And thirdly, a numerical calculation method for the flow field of the engine combustion chamber is newly explored.

The invention discloses a large-pipe-diameter water conveying pipeline dislocation deformation monitoring structure and monitoring method, and belongs to the technical field of deformation measurement of water conveying pipelines in water conservancy and hydropower engineering. The structure comprises a pipeline A, a pipeline B, a two-way dip angle detection mechanism, a displacement detection mechanism and a data collecting and processing mechanism, one end of the pipeline B is connected with one end of the pipeline A through an expansion joint, and the two-way dip angle detection mechanism and the displacement detection mechanism are both connected with the pipeline A and the pipeline B; the bidirectional inclination angle detection mechanism and the displacement detection mechanism both stride across the expansion joint, and the data acquisition and processing mechanism is electrically connected with the bidirectional inclination angle detection mechanism and the displacement detection mechanism. High-precision automatic monitoring of vertical dislocation deformation delta H and horizontal dislocation deformation delta S of the water conveying pipeline is achieved, the dislocation deformation problem of the water conveying pipeline is found and handled in time, manual intervention is reduced, working efficiency is improved, safety accidents caused by dislocation deformation of the pipeline are effectively avoided, and long-term operation safety of the water conveying pipeline is guaranteed.

The invention discloses a radial target system for a hydrogen ion implanter, and relates to the field of cyclotrons. The radial target system for the hydrogen ion implanter comprises a vacuum chamber and a supporting frame installed on the outer wall of the vacuum chamber, a target head integrated part is arranged in the vacuum chamber in a sliding mode, a water conveying needle is arranged in the supporting frame, the tail end of the water conveying needle is fixedly welded to the target head integrated part, and the water conveying needle is driven by a linear transmission module in the supporting frame. And a stay wire sensor is arranged between the water conveying needle and the supporting frame. According to the radial target system for the hydrogen ion implanter, the small-size compact design is adopted, meanwhile, the radial target system integrates and optimizes the functions of water-cooling heat dissipation, beam measurement, linear transmission, position feedback and the like, the number of machined parts is reduced, the cost and the assembly difficulty are reduced, meanwhile, no sensing lead needs to be added in a vacuum chamber, and the production cost is reduced. And the problem of bombardment damage of the beam to the cable is fundamentally solved.

The application belongs to the technical field of photoelectric detection, and discloses a kind of line spectrum confocal sensor's calibrating device and calibrating method.The device includes integrated standard, displacement generating device, displacement measuring device and driving device, driving device drives displacement generating device to generate vertical displacement, displacement measuring device measures the displacement generated in vertical direction, when displacement generating device occurs displacement in vertical direction, integrated standard is moved in vertical direction;Line spectrum confocal sensor measures the profile displacement of integrated standard in vertical direction, and compares the measured result with the result measured by displacement measuring device, to obtain the extreme position error of line spectrum confocal sensor in vertical measurement plane in transverse and vertical direction, and establishes error model.Through the application, the problems that existing line spectrum confocal sensor is difficult to calibrate and cannot be calibrated are solved.

The invention particularly relates to a method for detecting sodium in a sodium-related pipeline, which comprises the following steps of: 1, locally heating a single side of the sodium-related pipeline as a heating side of the sodium-related pipeline; taking the side opposite to the heating side of the sodium-related pipeline as a non-heating side of the sodium-related pipeline; 2, temperature measurement is carried out on the heating side and the non-heating side of the sodium-related pipeline at the same time; 3, judging whether sodium exists in the sodium-related pipeline or not according to the temperature difference between the heating side and the non-heating side of the sodium-related pipeline, and calculating the sodium content in the sodium-related pipeline; and the temperature difference when sodium exists in the sodium-related pipeline is smaller than the temperature difference when sodium does not exist in the sodium-related pipeline. According to the method for detecting the sodium in the sodium-related pipeline, whether the sodium exists in the sodium-related pipeline or not is simply and rapidly detected, and the maintenance operation safety of the sodium-related pipeline is ensured.