4results about How to "Avoid error effects" patented technology

The embodiment of the invention belongs to the technical field of gas concentration measurement, and relates to a target gas concentration change measuring device which comprises a gas supply module, a gas sensor, a gas flow interface, a pressure sensor and a main control processing module, the gas supply module and the gas sensor are communicated with the gas flow interface through a gas path; the main control processing module is used for controlling the gas supply module to output a test gas with a first pressure to the gas flow interface, wherein the test gas contains a target gas component with a first concentration; detecting the concentration of the gas flow output from the gas flow interface through a gas sensor to obtain the actually measured concentration, and detecting the pressure of the gas flow flowing through the gas sensor through a pressure sensor to obtain the gas path pressure; according to the ratio of the first pressure to the gas path pressure, correcting the actually measured concentration into a second concentration under the first pressure; and determining the concentration variation of the target gas according to the first concentration and the second concentration. Therefore, the concentration variation of the target gas in the whole test process can be measured more accurately.

The application discloses a kind of based on satellite data's sensible heat latent heat influence under photovoltaic power prediction model's construction method, by obtaining photovoltaic field station's stationary satellite band and era5 meteorological assimilation data and carry out space-time alignment processing, calculate surface net radiation flux and surface soil heat flux, latent heat flux is calculated in combination with sensible heat flux, construct sensible heat flux and latent heat flux training set, carry out sensible heat flux and latent heat flux time series analysis by multiscale diffusion prediction network, output sensible heat flux and the short-term forecast data of latent heat flux, obtain historical near weather data and physical constraint data, jointly short-term forecast data carries out photovoltaic power prediction, constructs photovoltaic power prediction model, obtains the actual photovoltaic power measurement value of photovoltaic field station, combined with photovoltaic power prediction result carries out prediction accuracy evaluation to photovoltaic power prediction model, carries out model optimization based on evaluation result. With the effect of improving photovoltaic field station to respond to atmospheric sensible heat latent heat under photovoltaic power prediction ability.

This utility model discloses an assembly structure for a plate-tube evaporator, including a plate-tube evaporator assembly, a cabinet assembly, and a fixing assembly. The plate-tube evaporator assembly consists of pipes and an aluminum plate, with the aluminum plate securing the pipes via pipe clips. The inner side of the cabinet assembly has a groove extending along the inner wall of the cabinet to accommodate the edge portion of the aluminum plate. The fixing assembly includes symmetrically arranged aluminum clips with positioning structures that engage with the corners of the aluminum plate, achieving lateral and longitudinal positioning and fixing of the plate-tube evaporator assembly by inserting into the groove. Preferably, the pipes can be made of copper or aluminum and connected to the aluminum plate via a thermally conductive adhesive layer; the pipe clips can be integrally stamped from an aluminum plate or made of plastic; the width of the groove forms an interference fit with the aluminum plate to enhance the fixing effect; the aluminum clips have anti-slip textures to improve fixing reliability. This utility model improves the assembly stability and production operability of the evaporator and is applicable to various types of plate-tube evaporator refrigerators.

The present application relates to a kind of thin-walled cabin section class part alignment method, belong to part processing technical field, solve the problem that the precision of machining reference cannot be ensured in prior art for the part with large shape surface deformation and no machining allowance.The method comprises: taking a point on the part as zero point O, and based on the zero point O, scanning the part, establishing theoretical three-dimensional coordinate system XYZ in the three-dimensional model of the part;In three-dimensional model, construct plane ABC;Adjust the position of the part until the normal vector a of plane ABC coincides with the Z axis of theoretical three-dimensional coordinate system XYZ;In three-dimensional model, construct new plane DEP, plane FGQ;In three-dimensional model, adjust the position of plane DEP, plane FGQ, so that the included angle β and γ between the normal vector b, c of plane DEP, plane FGQ and normal vector a are 90°.Realize that under the condition that the shape of the part is deformed relatively large, the part can be aligned more accurately.