52results about How to "Realize plug and play function" patented technology

The invention discloses a method and a system for playing multimedia files in an external USB (universal serial bus) storage on the basis of an Android platform. The method includes the steps: when the USB storage is externally connected to an Android device using the Android platform, controlling to mount the USB storage to a specified file catalog in a file system of the Android device; starting a video player or an audio player; acquiring a multimedia file to be played from the USB storage according to a playing request of the video player or audio player, analyzing the multimedia file to a specified data pool in the Android device; returning the analyzed multimedia file from the data pool to the video player or audio player, and allowing the video player or audio player to play the multimedia file. Management and playing of the multimedia data are centralized, flow management is centralized, the function of plug and play is realized, and users of the Android devices are provided with better experience.

The method of establishing intelligent virtual display for intelligent virtual control instrument includes the following steps: determining the configuration of intelligent virtual display; determining the makeup of intelligent virtual display; establishing the modules, instrument function library and function library for the intelligent virtual display; and establishing the development system and making the intelligent virtual display in Windows system through constituting the outer appearance of the intelligent virtual display via setting and altering the attribute, selecting the function of the intelligent virtual display and selecting the instrument function of the intelligent virtual display. The present invention has the technological features of several switched display modes, capacity of meeting the requirement of virtual instrument and plug-and-play function.

The invention discloses a hot plug system and a hot plug method for a field test bus function module. The hot plug system comprises a controller, wherein the controller is connected with a state monitoring line between the controller and an MCU by means of a field test bus; the controller transmits a control signal for switching on MOSFET to a MOSFET driving module by means of the field test bus;a source electrode voltage output end of the MOSFET driving module is connected with a source electrode of the MOSFET; a gate voltage output end of the MOSFET driving module is connected with a gate electrode of the MOSFET; a drain electrode of the MOSFET supplies power to the field test bus function module; an output voltage monitoring module monitors a power supply voltage of the field test busfunction module and feeds back the power supply voltage to the MCU; and an input current monitoring module detects an input current input to the source electrode of the MOSFET by means of the field test bus and feeds back the input current to the MCU. Compared with a traditional hot plug method, the hot plug system and the hot plug method have the advantages of being flexible in parameter setting,small in size, low in cost, good in safety and stability and the like.

A method for dynamically distributing IP address on set-top box includes connecting client end module to IPTV set top box of Internet and using service end module to distribute and manage DHCP server of IP, utilizing set-top box at client end to monitor UDP port 67 and to send IP address leasing request as well as to configure TCP / IP, using server at service end to receive IP address leasing request of set -top box and to return confirmed IP address back as well as to change IP address mapping table on server.

The invention provides an optical line terminal and an optical network unit. The optical line terminal of the invention comprises a deviation wavelength determination unit. The deviation wavelength determination unit is used for obtaining a second channel of uplink optical signals and determining whether the wavelength of the second channel of uplink optical signals is deviated with respect to peak transmission wavelength in the characteristic frequency spectrum of receiving arrayed waveguide grating, and determining deviation wavelength information if the wavelength of the second channel of uplink optical signals is deviated with respect to the peak transmission wavelength, and encoding the deviation wavelength information to downlink multi-wavelength optical signals. The optical network unit of the invention can adjust the wavelength of optical signals of a tunable laser according to received deviation wavelength information. By means of the optical line terminal and the optical network unit of the invention, the wavelength of the tunable laser of the optical network unit can be controlled remotely at the optical line terminal. The optical line terminal and the optical network unit of the invention are advantageous in structural simplicity, easiness in implementation and low cost.

The invention discloses a cooperative control method applicable to a photovoltaic generator set without a main control center. Auxiliary variable iterative calculation is introduced so that an output power of the photovoltaic generator set is obtained; through a high-level controller, a stocking rate instruction value is calculated; approximate calculation is carried out on a maximum power output by each photovoltaic generator and then measured values of stocking rates are calculated; a communication matrix is established, and through a bottom layer controller, reference values of the stocking rates and reference values of DC bus voltages of grid-connected inverters are calculated; and through a voltage current double-closed-loop PI control method of the photovoltaic grid-connected inverters, stable control of output power of each photovoltaic generator is realized. The method does not need to arrange a main control center to control the photovoltaic generator set so that communication device and cost are saved and operation robustness is improved and a plug and play function is realized; and cooperative control of output powers of a large number of photovoltaic generators which are geometrically distributed is realized and support is provided to smoothing of load fluctuations of an electric power network and improvement of voltage and frequency stability in the electrical power network.

The invention provides a plug and play device activation method and a system thereof. An NVC device and an NVT device are initially located in limited working modes; the NVC device starts its own device management module to search the NVT device, sets the found first activation code of the NVT device by using the security activation code obtained by itself, activates the NVT device and enables the NVT device to be located in a normal working mode; when the NVT device is located in the normal working mode, the NVT device sends video bitstream to the NVC device according to the received video service request of the NVC device. In adoption of the method and the system of the invention, the plug and play function can be realized rapidly; the user operation is convenient; and the security is high.