3results about How to "Guaranteed normal read" patented technology

The application relates to a construction site safety management method and system, an access control system and a safety helmet, and belongs to the field of engineering construction. After a construction personnel issues an access request to an access control system of a construction site, the access control system cooperates with the safety helmet of the construction personnel to understand the current wearing condition of the protective tool of the construction personnel, and processes the access request of the construction personnel based on the wearing condition of the protective tool, so that the construction personnel who do not wear the protective tool in a qualified manner can be prevented from entering the construction site, and in turn, the safety hazards caused by the non-compliance of the wearing of the protective tool can be reduced. Moreover, the safety helmet is the most basic and common protective tool, a radio frequency card reader is arranged on the safety helmet, the construction personnel do not need to carry an independent radio frequency card reader, the burden of the construction personnel is reduced, and the radio frequency card reader can also ensure that the radio frequency tags on other protective tools worn by the construction personnel can be normally read.

The application relates to a solar cell charger, in particular to a solar charger integrated with load output control. The charger comprises a storage battery, a solar panel, a synchronous Buck rectifier circuit, a processor, a flyback power supply and a load output control circuit, wherein the flyback power supply provides multiple isolated voltages for the chip and the circuit, the control end of the synchronous Buck rectifier circuit is connected with the first output end of the processor, and the control end of the load output control circuit is connected with the second output end of the processor. The purpose is to design a solar charger integrated with load output control, which can automatically drive other loads to work while charging the battery, reduce the power loss, and has the advantages of stable system operation, safety, etc. Compared with the prior art, the system has the advantages of good stability, remote monitoring of the battery charging state, effective protection of the solar panel and the storage battery, reliable storage of operation data, etc.

This utility model provides a closed-loop sampling system for a vinyl chloride converter, relating to the field of vinyl chloride sampling technology. The closed-loop sampling system includes a converter with a sampling ball valve at its outlet; an analysis unit including an injection valve, an online analytical chromatograph, and an outlet valve; and connecting pipelines including an injection pipeline, an air pipeline, a nitrogen pipeline, a standard gas pipeline, and an outlet pipeline. The two ends of the injection pipeline are connected to the outlet of the sampling ball valve and the inlet of the injection valve, respectively. The air, nitrogen, and standard gas pipelines are connected to the injection pipeline, and the outlet pipeline is connected to the outlet valve. This system enables automatic sampling and analysis, reducing the time required for material analysis, improving the accuracy and timeliness of analytical data, and achieving precise control of the reaction in a single converter.