Abstract: The present disclosure provides an electromagnetic environment evaluation system for a civil airport and an aviation station. An integrated transport hub, air-rail intermodality, and rail transit cause relatively strong electromagnetic interference to a navigation station. A high voltage transmission line and a communications base station also cause relatively strong electromagnetic interference to the navigation station. A large charging pile and other industrial, scientific, and medical (ISM) devices next to the airport cause electromagnetic interference to a navigation device in the airport. In the present disclosure, such interference is detected. If an interference determining apparatus determines that there is an anomaly after performing first interference determining, the interference determining apparatus performs second interference determining to avoid that subsequent actions are incorrect due to accidental data errors of the interference determining apparatus, and further reduce an error rate.

Abstract: The invention relates to a perforating device for thermoplastic plates, which relates to the technical field of a plate processing device. The device includes an electromagnetic chuck, one side of the electromagnetic chuck is connected with the driving member, the other side of the electromagnetic chuck is connected with a mounting plate and a spike. When the electromagnetic chuck is powered on, the spike is attracted below the mounting plate by an electromagnetic force generated by the electromagnetic chuck. A clamper is arranged below the mounting plate, the thermoplastic plate is fixed by the damper, and a heating system is also provided to heat the thermoplastic plate. As the electromagnetic chuck is powered on or off, the spike can be attracted in or separated from the mounting plate, respectively. Therefore, the perforating device can make a new plate be pierced during the cooling and curing process of the perforated plate.