Abstract: A extension case adaptable onto a mobile terminal device to enable extended functions, includes a sheath, an electrical connector, a battery, and a radio frequency identification (RFID) antenna. The sheath is configured to shieldingly receive the mobile terminal device and comprises a covering portion and a buckling portion curvedly extended from an outer edge of the covering portion. The electrical connector is arranged on the buckling portion of the sheath for establishing electrical connection with the mobile terminal device. The battery is disposed on the covering portion and is accessible to the mobile terminal device through the electrical connector. The RFID antenna is electrically connected to the electrical connector and embeddedly disposed in the covering portion adjacent to the battery in a non-overlapping manner.

Abstract: An intelligent pipeline pressure sensing device is disclosed. Conventionally, both blower and exhaust fan use the motor with fixed rotation speed to drive the fan blade, so the input/output airflow and pressure are also fixed. When the air inlet duct and air outlet duct are longer or have angle, or the filter is clogged, the drag in the air inlet and outlet ducts increases to cause the airflow or pressure therein to drop, which leads to inefficiency of the equipment and energy usage. The present invention is advantageous because the extent of clogging of the filter can be automatically detected and the user will be notified to wash or replace the filter, so the equipment can be operated at its best condition and in an energy-saving manner.

Abstract: This instant disclosure illustrates a RFID device for near-field communication, comprising a substrate, a winding and a RFID circuit. The substrate includes a first surface and a second surface. The windings are spirally reeled and mounted on the first surface and the second surface. A plurality of winding distances are between the windings, and the winding distances are not larger than the first winding distance. The RFID circuit is mounted on the first surface or the second surface of the substrate, and electrically connected to both of winding ends.

Abstract: A extension case adaptable onto a mobile terminal device to enable extended functions, includes a sheath, an electrical connector, a battery, and a radio frequency identification (RFID) antenna. The sheath is configured to shieldingly receive the mobile terminal device and comprises a covering portion and a buckling portion curvedly extended from an outer edge of the covering portion. The electrical connector is arranged on the buckling portion of the sheath for establishing electrical connection with the mobile terminal device. The battery is disposed on the covering portion and is accessible to the mobile terminal device through the electrical connector. The RFID antenna is electrically connected to the electrical connector and embeddedly disposed in the covering portion adjacent to the battery in a non-overlapping manner.