10 results about "Two-way radio" patented technology

Systems, devices, methods, and computer-readable media provide improved aviation operations management communications. A method includes receiving, from a first two-way wireless communications device and at a communications manager, a first communication, determining, by the communications manager, that the first communication includes (i) a question or (ii) a standard communication that has a standard response in accord with two-way radio transceiver etiquette, responsive to determining that the first communication includes the question or (i) a question or (ii) a standard communication that has a standard response in accord with two-way radio transceiver etiquette, generating, by the communications manager, a response to the first communication, and transmitting the response to the first two-way wireless communications device.

An interposer accessory fits between a two-way radio and its removable battery and maintains pass-through power connections between them, with any auxiliary communication contact passed through without termination. Power-conversion circuitry provides at least one regulated external output, for example a 5 V USB output accessible from the housing. In some embodiments the interposer further includes a USB input interface configured to accept external power and charge the attached battery through a unidirectional and / or OR-ing arrangement. The accessory can retain the radio's form factor using tabs and a spring latch with a thumb release, and may include indicators that convey charge state at the housing. The interfaces can be dimensioned for different radio families while preserving the pass-through connections and external output. USB Power Delivery capability is optional.

This invention discloses a bidirectional wireless power transfer system for electric vehicles, relating to the field of wireless charging technology for electric vehicles. By configuring the first and second high-frequency conversion units as full-bridge converters, this invention enables bidirectional power flow. Switches are installed on both the connection branch between the first high-frequency conversion unit and the ground-side compensation network, and on the connection branch between the second high-frequency conversion unit and the vehicle-side compensation network. By controlling the opening and closing of these switches, the entire bidirectional wireless power transfer system can transmit power efficiently across a wide operating range, from light to heavy loads.

A two-way radio device for hearing protection devices provides communication capabilities to users wearing hearing protection devices, which would ordinarily hinder or block communication. The two-way radio device removably attaches to a portion of a hearing protection device and connects to the speakers thereof. One or more wireless transceivers provide wireless transmission of audio between users of hearing protection devices enhanced with the two-way radio device. Users remain protected by their hearing protection devices and while communicating freely in high decibel environments.

Device for the continuous, automatic display of the current take-off and landing direction and the weather conditions at an airfield in the cockpit of aircraft, characterized in that the device consists of a receiver installed in an aircraft (16) with a display (18), a loudspeaker (21), the connection of the receiver to a two-way radio, a transmitter (14) whose associated transmitting antenna is located at the airfield in question, the measuring instruments (12) required for measuring the weather data at the airfield and optionally one or more cameras (15) for detecting obstacles on the active runway (20) of the airfield.

The invention belongs to the technical field of underwater wireless power transmission and energy supply, and particularly relates to an omnidirectional capture type wireless power transmission magnetic coupling mechanism for an underwater vehicle. Comprising a mooring side magnetic coupling assembly and a vehicle side magnetic coupling assembly, the mooring side magnetic coupling assembly is installed on a mooring cable body, the vehicle side magnetic coupling assembly is integrated at a mechanical locking mechanism of an underwater vehicle, and the mooring side magnetic coupling assembly comprises a solenoid coil and a mooring side flexible magnetic material layer which are arranged in a mooring side insulation packaging layer in a sealed mode; the aircraft side magnetic coupling assembly comprises a double D-shaped coil and an aircraft side flexible magnetic material layer which are sealed in an aircraft side insulation packaging layer; the aircraft side magnetic coupling assembly actively captures and tightly holds the mooring side magnetic coupling assembly through the mechanical locking mechanism, the aircraft side magnetic coupling assembly and the mooring side magnetic coupling assembly are kept in a relatively static state in the charging process, and a two-way wireless electric energy transmission channel is established. The underwater docking system is extremely simple and light in weight, and has the advantages of being high in coupling, large in tolerance, good in two-way adaptability and the like.

The application discloses a light-load control method and device for a symmetric LCC type bidirectional wireless power transmission system for battery energy storage, relates to the technical field of wireless power transmission, and determines the proportion of reactive power in apparent power and the light-load degree of the current working condition of the system relative to the rated power through the DC side parameters of the symmetric LCC type bidirectional wireless power transmission system, and then determines a light-load reactive factor, identifies the light-load working condition according to the upper limit threshold and the lower limit threshold of the light-load reactive factor, calculates the minimum external phase angle that meets the zero voltage switching of the symmetric LCC type bidirectional wireless power transmission system and the constraint relationship of reconstructing the original and secondary side full-bridge internal phase angle, so as to realize the power adaptive control under the light-load working condition, suppress the reactive circulating current while realizing the zero voltage switching, and improve the operation efficiency of the charging system.

The application discloses a kind of bidirectional AC / DC wireless power transmission system control methods, the system is in the direct current input front side of traditional SS compensation wireless charging system Joining a full-bridge circuit and AC filter circuit, can realize power AC / DC and DC / AC bidirectional transmission.When working in AC / DC direction, the voltage phase relationship and impedance characteristic phase shift control of SS compensation wireless charging system under natural constant current frequency are used to control the latter circuit, without additional PFC circuit and AC side current sampling, power factor correction function is realized, and has constant voltage output and constant current output capability.When reverse operation, the system can realize power DC / AC transmission.Compared with the traditional bidirectional AC / DC wireless power transmission system, the system has the advantages of low cost and high efficiency, and the control method is easy to implement.

The invention relates to the technical field of wireless bidirectional electric energy transmission, and discloses a bidirectional wireless electric energy transmission method and a topological structure thereof. The bidirectional wireless electric energy transmission topological structure comprises a first-side three-bridge-arm converter, a middle-side coupling mechanism and a second-side three-bridge-arm converter. The first-side three-bridge-arm converter comprises a first bridge arm, a second bridge arm and a third bridge arm, and the second-side three-bridge-arm converter comprises a fourth bridge arm, a fifth bridge arm and a sixth bridge arm; the bidirectional wireless power transmission method comprises the following steps: controlling a first bridge arm and a third bridge arm according to a first independent bridge arm driving signal, and controlling a fourth bridge arm and a sixth bridge arm according to a second independent bridge arm driving signal; and controlling the second bridge arm according to the first multiplexing bridge arm driving signal, and controlling the fifth bridge arm according to the second multiplexing bridge arm driving signal. By adopting the bidirectional wireless electric energy transmission method and the topological structure thereof, the current stress of the independent bridge arm can be reduced under the condition that the transmission power is not changed, so that the system loss is reduced.

This document describes the techniques and methods for providing ruggedized portable communication systems. Many users utilize portable communication systems, including two-way radios, for outdoor activities (e.g., rock climbing, rafting, skiing). However, many portable communication systems lack the durability and ruggedness to withstand harsh environments while maintaining good acoustic characteristics. The ruggedized portable communication systems described herein provide techniques to maintain acoustic characteristics and improve user accessibility even under the most severe conditions. For example, this document describes passive drainage technology that withstands continuous water exposure without degrading the acoustic characteristics of the speaker and / or microphone.