4results about How to "Timely exclusion" patented technology

This invention relates to the field of building equipment automation and predictive maintenance technology, and particularly to an online control method and device for HVAC duct gas. The method includes: acquiring pressure signals from a closed-loop HVAC duct system; extracting multi-dimensional fluctuation features from the pressure signals to obtain pressure signal characteristics; weighted fusion of the signal features to obtain a comprehensive diagnostic index; based on the pressure signals, performing fault-tolerant judgment on the operating conditions of the HVAC duct; determining the diagnostic threshold of the comprehensive diagnostic index based on the fault-tolerant judgment result; comparing the comprehensive diagnostic index with the diagnostic threshold; and executing corresponding graded exhaust control actions for the HVAC duct based on the comparison result. This invention can solve the problems of high hardware and maintenance costs, difficulty in detecting accumulated trace gases in existing technologies, and the limitations of detection technologies, which are limited to direct detection or single-feature judgment, and cannot effectively identify dynamic pressure fluctuation characteristics, making early and accurate gas diagnosis difficult.

The utility model relates to a water conservancy construction slope protection assembly belongs to the technical field of slope protection, including retaining wall, rainwater inlet one, broken platform, sidewalk, rainwater inlet two, rainwater inspection well, concrete socket pipe, and the drainage main steel pipe is poured in retaining wall, and the upper and lower ends of drainage main steel pipe are fixed with steel upper bend and steel lower bend respectively, and the other end of steel upper bend and steel lower bend is connected with rainwater inlet one and rainwater inlet two respectively, and the bottom of retaining wall is equipped with broken stone backfill layer, and the top inboard of broken stone backfill layer is equipped with the support slope that supports retaining wall bottom and makes retaining wall inboard lean and stick in the outside of slope body. The utility model, can timely remove the water on the slope road inboard of retaining wall, reduce the water pressure behind wall, prevent the deformation, displacement even collapse because of too much water and retaining wall bear too big lateral pressure, guarantee the stability of retaining wall. Improved drainage efficiency, and the bottom of retaining wall is equipped with broken stone backfill layer, and retaining wall settlement is prevented better.

This utility model discloses a train braking interface and a device for the graded collection and detection of wheel-rail friction particles, including a train braking test bench, a discharge circuit, a braking system, an isolation chamber, a particle grading and filtration collection device, a filter screen, and a particle settling collector. The braking system is placed in the isolation chamber, which is connected to the particle grading and filtration collection device through the discharge circuit. The particle grading and filtration collection device has multiple layers of filter screens and a particle settling collector arranged sequentially from top to bottom. A dynamic detection opening is provided on the side, connected to an external particle concentration detection device. By monitoring the changes in particle concentration within the device in real time, the operating state of the filter screen is dynamically adjusted to effectively prevent clogging. This utility model is applicable to particle detection and particle size classification collection under various brake disc materials, brake pad installation methods, and complex braking conditions. It can detect particles generated by the braking system and wheel-rail friction separately or simultaneously, providing technical support for research on environmental protection and performance optimization of train braking systems.

The invention relates to the technical field of recycled water resource utilization and pipe network scheduling, and discloses a recycled water dynamic water taking scheduling method and system based on pipe network pressure and water quality data, and the method comprises the steps: collecting the pipe network pressure data and the water quality data of each water taking point; the deviation between the pipe network pressure data and the pipe network pressure center threshold value is calculated, the deviation is analyzed and processed, and a pressure abnormity judgment result is obtained; the standard exceeding multiple is analyzed and processed, and a water quality abnormity judgment result is obtained; according to the pressure abnormity judgment result, the water quality abnormity judgment result and the distance between the water taking points and the user, comprehensive scores of all the water taking points are calculated through a linear scoring model, and the optimal water taking point is obtained; according to the method, the technical problems that according to an existing dispatching mode, a pipe network is damaged due to the fact that local pressure is too high or water supply efficiency is affected due to the fact that the pressure is too low, and the water taking points with the water quality exceeding the standard are difficult to avoid in real time are solved.