35results about How to "Realize two-way data transmission" patented technology

The invention relates to a urban intelligent parking network management system comprising an intelligent big data control center, wireless geomagnetic sensors installed in a parking lot, vehicular electronic tags installed on vehicles, and first readers installed on the entry and the exit of the parking lot. Second readers are installed in the wireless geomagnetic sensors and identify the vehicular electronic tags in order to detect parking stall states and vehicle owner information. Communication connection among the wireless geomagnetic sensors at different parking stalls is achieved through Bluetooth modules and the wireless geomagnetic sensors are connected with the intelligent big data control center through a wireless WIFI transmission module. The first readers read the vehicular electronic tags to obtain vehicle information and automatically calculate parking charge according to parking time. The urban intelligent parking network management system also comprises a smart phone terminal in which an ETC-style non-stop charging program is installed. The urban intelligent parking network management system standardizes and rationalizes urban parking, guarantees high parking efficiency, and achieves an intellectualized characteristic.

The invention relates to the mobile terminal used for sending and receiving short message, and comprises a short message transceiver platform and a short message management platform. Said short message management service platform is connected to the internet via WEB and forms a bidirectional calling mode with the short message transceiver platform to realize the collection, analysis, storage, process and release functions between both message sending and receiving ends.

The invention relates to an AC charging pile control system of a three-dimensional garage. The system comprises an intelligent control module, a plurality of combined functional modules, a plurality of charging piles and a cloud server. The plurality of combined functional modules are connected with the intelligent control module. The intelligent control module is connected with the cloud server. Each charging pile is connected with one combined functional module. Furthermore each charging pile is connected with a cable. Furthermore one end, which is far from the corresponding charging pile, of the cable is connected with a corresponding parking space of the three-dimensional garage. The AC charging pile control system can perform individual control on the charging pile of each parking space in the three-dimensional garage through the intelligent control module, thereby realizing centralized management and high convenience. Furthermore the combined functional module can correspond with one or a plurality of charging piles, thereby realizing flexible arrangement. Remote distribution and remote control are realized through the cloud server, thereby realizing high efficiency. The AC charging pile control system has relatively high promotion value for electric vehicle popularization.

The invention discloses a communication interface circuit based on a power line, and the circuit comprises: a power supply isolation unit which separates electric energy on a communication bus, and provides working electric energy for the normal operation of a circuit main control unit; a data sending unit which is used for converting communication data into high-frequency signals and loading thehigh-frequency signals to the power line, and comprises a carrier synthesis circuit and a signal and power supply coupling circuit; and a data receiving unit which is used for demodulating data on thecommunication bus and converting the demodulated data into a level signal which can be identified by the controller, and comprises a filter circuit, a differential amplification circuit, a comparatorand a logic signal conditioning circuit. According to the communication interface circuit based on the power line, based on an existing power supply line, bidirectional data transmission between theoutside and a product main control system can be achieved under the condition that extra connection lines are not added, and the communication function is achieved.

The invention discloses an audio and video playing method. The method comprises the following steps: S1, an audio and video instruction input by a user is detected; S2,a terminal streaming media server obtains a corresponding audio and video stream from the starting end streaming media server; S3, the terminal streaming media server identifies the codes of the audio and video streams and transcodes the codes; S4, the terminal streaming media server transmits the converted audio and video streams to a web browser, and the web browser acquires audio and video stream codes identified by the web browser and performs decoding operation; and S5, the audio and video by using a webpage player is played and displayed. The invention further provides a storage medium and an audio and video playing device, according to the method provided by the invention, the network stream taking and decoding conversion process is independent to provide service for a browser or a client player, and meanwhile, the display playing function of the browser is used for playing, so that the problem of terminal installation and deployment can be solved. Playing of audio and video streams in a specific format can besupported, and the customization function requirement is met.

The invention discloses a Bluetooth control based UAV remote control system which comprises a trainer remote controller and a student remote controller. Each of the trainer remote controller and the student remote controller is provided with a Bluetooth communication module to realize a mutual communication function, a protective cover is hinged to one side of the upper end of the remote controller and connected to the remote controller via a positioning device, and a mobile phone is clamped in the protective cover via a clamping mechanism. The Bluetooth communication module can switch the communication manner, the trainer UAV remote controller sends an instruction to the student UAV remote controller when a guidance instruction is needed, and the a high-speed transmission mode is startedto realize large-amount bidirectional data transmission when bidirectional data transmission with the clamped mobile phone is needed. The system has the advantages that one trainer can guide multiplestudents, high-speed large-amount data transmission can be realized, and an aircrash accident can be effectively prevented.

The method discloses information interaction methods and an information interaction system based on microphone equipment and related equipment. The method includes the steps that a first communicationchannel is obtained by a first communication interface of the microphone equipment and a first communication interface of a user terminal through wireless connection, the microphone equipment can send to-be-processing audio-frequency data to the user terminal through the first communication channel, and the user terminal executes a specified operation on the to-be-processed audio-frequency data after the to-be-processed audio-frequency data are received. By implementing the embodiment of the invention, wireless data transmission from the microphone equipment to the user terminal can be realized, use flexibility of the microphone equipment can be enabled to be improved, and thus use experience feeling of a user can be improved.

The invention discloses an LED display module, an LED display screen and control equipment of the LED display screen. The LED display module comprises an LED lamp module, a first bidirectional bus driver and a data feedback module. Wherein the data feedback module is respectively connected with the LED lamp module and the first bidirectional bus driver and is used for forming a plurality of pathsof current signals and inputting the current signals into the LED lamp module to generate feedback data; and the first bidirectional bus driver is used for sending and receiving data to and from the LED lamp module and the data feedback module. According to the embodiment of the invention, the bidirectional data transmission of the LED display module can be realized at low cost, so that the control system can automatically identify the information and the working state of the LED display module, and the intelligent control of the LED display module is realized.

The invention provides a modem based on GSM (Global System for Mobile Communications) or GPRS (General Packet Radio Service), which comprises a main module. The invention is characterized in the invention also includes an antennal interface module, an Ethernet interface module, and an asynchronous serial interface module which are connected with the main module by separate circuits. The main module consists of a radio frequency function block and a baseband control module which are connected by circuits. The modem provided by the invention is based on GSM (Global System for Mobile Communications) or GPRS (General Packet Radio Service), and is inlaid with TCP or IP (Transmission Control Protocol or Internet Protocol) protocol stack inside. With the standard serial communication interface, the antennal interface and an Ethernet interface, the modem is suitable to all equipments with serial interface terminals, thus providing the terminal equipments without TCP or IP protocol processes with radio communication capability.

The invention discloses a bidirectional communication isolating device of a power plant. With the adoption of the bidirectional communication isolating device, communication isolation between multiple unit plant control systems is realized, and meanwhile, bidirectional data exchange between multiple unit plants and a public system is realized. The main functions of the bidirectional communication isolating device are as follows: TCP (transmission control protocol) connection between unit plant application gateways is prohibited to be directly and indirectly established; TCP connection is established between the application gateways of the unit plants and the public system as well as inside and outside network cards of the insolating device; and the inside and outside network cards of the insolating device are in non-networked connection in the device, so that complete physical isolation between multiple unit plant control networks is realized, and meanwhile, bidirectional data exchange is realized between the unit plants and the public system in a non-networked mode; comprehensive message filter and assess control based on an IP, a transmission protocol, a transmission port and a communication direction are supported by adopting a transparent message monitoring mode without an IP address and an MAC (multi-access computer) address; a customized application layer protocol function is supported; and the bidirectional communication isolating device has safe and easy-to-use maintaining and managing manner, and has a graphical maintaining and managing tool based on a centralized safe management manner, so that the requirements on the maintainability and usability of the process system are satisfied.

A public rental house intelligent lock information state transmission method comprises the steps that a rental house network platform issues an instruction to inquire a product serial number and an updated version of an intelligent lock, an intelligent lock control chip uploads the networking state of the intelligent lock to the public rental house network platform, the public rental house network platform issues an instruction to enable the intelligent lock to reset a WIFI wireless network and configure the intelligent lock, and the intelligent lock sends the instruction to the public rental house network platform. And the intelligent lock control chip uploads the real-time state information of the intelligent lock to the public rental housing network platform, and the public rental housing network platform carries out feedback processing. According to the intelligent lock, data and network configuration is carried out on the intelligent lock through Bluetooth or WIFI, a user can check the real-time state of the intelligent lock on a public rental house network platform, under the condition that the WIFI network is disconnected, the intelligent lock control chip can store the sent state information into a built-in storage, and when the network is reconnected, the intelligent lock can be unlocked. And the intelligent lock control chip automatically sends the data information which is not sent to the public rental house network platform, so that data packet loss is avoided.

The invention discloses a Web application instant message notification system, a Web application instant message notification method and a Web application instant message notification server. The Web application instant message notification system comprises a message distribution platform, a data transmission control channel and a plurality of communication servers, the communication server side is used for carrying out bidirectional data transmission with the user side corresponding to the communication server side based on a Web Socket protocol; the message distribution platform is used for distributing the received message to each communication server through the data transmission control channel in a broadcast form; the data transmission control channel is used for controlling the messages distributed by the message distribution platform to be directionally broadcasted to one or more specified communication servers through a self-defined first data transmission strategy; through the instant message notification system, bidirectional data transmission between the application rear end and the application front end of the Web application can be realized, the application rear end is allowed to actively send data to the application front end, in addition, the message of the application rear end is directionally broadcasted to the specified user side, and the diversified requirements of different Web applications are met.