Abstract: An electro-acoustical transducer device is disclosed, which includes: a hollow disk body that generally defines an axis of propagation, the hollow disk body comprising: a pair of plate members extending substantially perpendicular to the axis of propagation, each provided with a central transmitting port arranged about the axis of propagation, and a peripheral enclosure jointing the pair of plate members at the respective outer edge portions thereof, thereby defining a chamber of resonance between the pair of plate members; wherein a ring-opening about the axis of propagation that enables access to the chamber of resonance is formed between the central transmitting ports of the plate members.

Abstract: The present invention provides a method for generating a virtual navigation route, by obtaining multiple navigation points each with a flag data; identifying at least two lanes from a front video data; creating a navigation characteristic image according to the flag data, the navigation points, the front video data, and the at least two lanes, wherein the navigation characteristic image has multiple dotted grids; calculating a probability of a navigation route passing through each dotted grid, and setting the dotted grid with the highest probability calculated in each row of the navigation characteristic image as a first default value; and fitting curves for the grids with the first default value as the navigation route; the navigation route is generated in real time and projected over the front video data using an augmented reality (AR) method, achieving AR effects and navigating with better representation of the traffic.

Abstract: The present invention provides a method for generating a virtual navigation route, by obtaining multiple navigation points each with a flag data; identifying at least two lanes from a front video data; creating a navigation characteristic image according to the flag data, the navigation points, the front video data, and the at least two lanes, wherein the navigation characteristic image has multiple dotted grids; calculating a probability of a navigation route passing through each dotted grid, and setting the dotted grid with the highest probability calculated in each row of the navigation characteristic image as a first default value; and fitting curves for the grids with the first default value as the navigation route; the navigation route is generated in real time and projected over the front video data using an augmented reality (AR) method, achieving AR effects and navigating with better representation of the traffic.

Abstract: An elevator automatic rescue and energy-saving control method, the method comprising: when the power grid supplies power normally, selecting a single current in a three-phase power grid (9) as an AC power supply for an elevator control system (10); controlling a DC-DC converter (2) to charge the super capacitor module (1) connected to the DC-DC converter to a specified standby electric energy level; and when the power grid is suddenly interrupted, selecting to use the electric energy stored in the super capacitor module (1) as a rescue electric energy for a traction motor (7) and the elevator control system (10). The described method uses a super capacitor module, so that a stable and reliable elevator rescue power supply is provided when the power grid is suddenly interrupted, and the regenerative electric energy dissipated during elevator braking operation is stored and utilized during elevator operation, thereby conserving energy.

Abstract: An elevator automatic rescue and energy-saving control method, the method comprising: when the power grid supplies power normally, selecting a single current in a three-phase power grid (9) as an AC power supply for an elevator control system (10); controlling a DC-DC converter (2) to charge the super capacitor module (1) connected to the DC-DC converter to a specified standby electric energy level; and when the power grid is suddenly interrupted, selecting to use the electric energy stored in the super capacitor module (1) as a rescue electric energy for a traction motor (7) and the elevator control system (10). The described method uses a super capacitor module, so that a stable and reliable elevator rescue power supply is provided when the power grid is suddenly interrupted, and the regenerative electric energy dissipated during elevator braking operation is stored and utilized during elevator operation, thereby conserving energy.