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

The invention discloses an underground personnel positioning and rescue system and a positioning method. It consists of three wireless monitoring nodes respectively set on both sides and the top of the mine road. The advantage is that it does not need to know the underground geographic information in advance. It uses the underground wireless network to automatically build an automatic three-dimensional positioning system for miners and wireless monitoring nodes. It does not need to add cables. It can monitor the specific location of the miners at any time, and when a mining disaster occurs, quickly and accurately calculate the location of the trapped miners through the wireless monitoring node network, which better protects the personal safety of the miners.

The invention discloses a bidirectional communication interface circuit based on current sampling, which includes a data transmission drive circuit and a data reception drive circuit; the data transmission drive circuit outputs power supply and transmits data signals; The sampling resistor is converted into a voltage signal, and after the voltage signal is amplified, compared with the threshold voltage, it is converted into a level signal that can be recognized by the controller. The bidirectional communication interface circuit based on current sampling provided by the present invention is based on the existing power supply line, and can realize bidirectional data transmission between the outside world and the main control system of the product without adding additional connections, thereby realizing the communication function.

The invention discloses an oil well data exchange system for realizing data transmission between a ground operating platform and an underground device. The system comprises a ground reader-writer, a low-frequency RFID (radio frequency identification) tag and an underground data processing subsystem. The underground data processing subsystem comprises an antenna arranged on an oil well pipeline, a read-write module and a common memory. The ground reader-writer writes data into the low-frequency RFID tag, the read-write module reads the data in the low-frequency RFID tag and the data are stored in the common memory; and if the read-write module is judged to download the tag, the data information in the tag is sent to the underground device; and if the read-write module is judged to upload the tag, the data stored in the common memory by the underground device are written into the low-frequency RFID tag, and the ground reader-writer reads the data. The system realizes bidirectional data transmission above and below the well by using the low-frequency RFID tag as a medium, plays a role in buffering the data through the common memory, and does not need to distribute or acquire the data for the underground device at the same time of reading / writing the tag so as to shorten the data reading / writing time and improve the reliability.

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 system used for underground machinery equipment. The communication system is characterized by comprising a wireless transmission part and a wire transmission part, wherein a master controller of each piece of equipment is connected with a signal conversion device through the wireless transmission part and is connected with ground equipment through the wire transmission part; the signal conversion device comprises a modem and a serial server; the serial server receives a data signal and sends the data signal to the modem; an underground telephone is connected with the modem through a telephone wire; and the modem is connected with an asymmetrical digital subscriber loop (ADSL) repeater through the telephone wire, is connected with digital subscriber line access multiplexer (DSLAM) equipment, and is connected with ground telephone and data receiving equipment finally. By combining wireless and wired modes, the communication system realizes two-waytransmission of voice and data with the help of an original telephone wire without mutual influence, greatly reduces system cost, and improves communication safety.

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.

The invention discloses a data transmission method between heterogeneous systems and a data transmission system, which aims at solving the problem that the data exchange between heterogeneous systems under physical network safety and defence can not be realized in the prior art. The method comprises that: a first communication system communicates with a first data channel between a data entry node of the system and a second communication system, and the data gateway node performs security detection for receiving the data sent by the second communication system through the first data channel; the first communication system disconnects the first data channel and communicates a second data channel between the data entry node and the data processing node of the system, the data processing node converts the format of the data which is received by the second data channel and undergone the security detection to the data format supported by the database of the system, and then saves the data to the database of the system. With the technical scheme of the invention, the data exchange between the heterogeneous systems under the higher data security environment can be realized.

The invention discloses an LED display module, an LED display screen and a control device thereof. The LED display module includes: an LED light module, a first bidirectional bus driver, and a data feedback module; wherein: the data feedback module, respectively It is connected with the LED lamp module and the first bidirectional bus driver, and is used to form several current signals to be input to the LED lamp module to generate feedback data; the first bidirectional bus driver is used to control the LED The light module and the data feedback module send and receive data. Through the embodiment of the present invention, the two-way data transmission of the LED display module can be realized at low cost, so that the control system can automatically identify the information and working status of the LED display module, and realize the intelligent control of the LED display module.