52results about How to "Improve data transmission distance" patented technology

The invention relates to a cooperative cloud control-based multi-unmanned-ship fleet cooperative control system and method. The method comprises the following steps: building cloud-shore connection through a shore-based control system and a cooperative cloud control system, and enabling the shore-based control system to communicate with the cooperative cloud control system based on the cloud-shoreconnection, so as to acquire control information of the shore-based control system for an unmanned ship fleet and unmanned ship fleet state information; and building cloud-ship connection through thecooperative cloud control system and the unmanned ship formation, and sending a control instruction of the cooperative cloud control system for the unmanned ship fleet based on the cloud-ship connection, so as to acquire state information of the unmanned ship fleet. According to the cooperative cloud control-based multi-unmanned-ship fleet cooperative control method disclosed by the invention, based on the cooperative cloud control system, a distributed calculation method is adopted, multiple cloud servers are called, and effective resources are fully used, so that the calculation capacity isimproved; the precision and the timeliness of unmanned ship fleet scheduling control are improved; collision of the unmanned ship fleet is effectively prevented; and furthermore, multiple unmanned ships work at the same time, so that the working speed and the working efficiency are improved.

The invention discloses a data signal and DC power source collinear transmission system and method. When the front equipment will send data to the rear equipment, data signals are input into the data receiving end of the front circuit; the front circuit encodes the data input and outputs synchronous PWM signals, to boost PWM signals so that the voltage of PWM signals on the first terminal is higher than that of DC power source; the mixed signals composed of PWM signals and DC power source signals are transmitted to the rear equipment through two-wire system bus; after signals are transmitted to the rear circuit, PWM signals and DC power source signals separate, and DC power source signals are output to DC power source output interface; the rear circuit conducts analysis treatment of synchronous PWM signals input and outputs corresponding data signals. In the invention, the whole system has a centralized power supply and collinear transmission of DC power source and high-speed data signals is realized in the two-wire system, which reduces the quantity of laid cables and system cost in monitoring and control of the system.

The invention discloses a RAW image radiation temperature measuring method. The method comprises the following steps: a CCD camera outputting image data in a RAW format, and storing the data as a true color RGB image after linearity interpolation; arranging the exposure time of the CCD camera through RAW image gray scale signals obtained from the image data in the RAW format; and extracting a spectral color value of each channel from the true color RGB image; obtaining image detection data from ratios of the spectral color values to the exposure time; taking a conversion proportion coefficient, calibrated through a black-body furnace, between the image detection data and incident radiation intensity, as a calibration constant; through the CCD camera, continuously acquiring radiation images, and extracting spectral color signals and exposure time signals of any two channels in pixels R, G or B; and performing correction through the calibration constant to form correspondingly extracted monochromatic radiation intensity signals under the condition of two primary wavelengths, and according to a colorimetric temperature measurement principle, obtaining an image temperature and a radiation ratio. The temperature measuring apparatus provided by the invention comprises the CCD camera, a stiff rod endoscope, a network switch and a background server.

The invention relates to a fiber grating force-measuring anchor rod device. The fiber grating force-measuring anchor rod device comprises an optical fiber, a rod beam and a hollow anchor rod, wherein at least one grating is arranged on the optical fiber, gratings are adhered onto the rod beam, the rod beam penetrates through the hollow anchor rod, a limiting block is arranged at one end of the rod beam and is clamped on one side of the hollow anchor rod, a fastening nut and an end nut are in threaded connection with the rod beam, the hollow anchor rod is connected with an optical fiber base through welding, the optical fiber base is in threaded connection with an optical fiber base cover, the optical fiber base cover is provided with an optical fiber connection flange and is in threaded connection with a protective cover, and an optical fiber outlet is arranged on the protective cover. According to the fiber grating force-measuring anchor rod device, deformation data of the anchor rod device are collected through fiber gratings, and the optical fiber has the advantages of being good in lightning stroke resistance, high in anti-electromagnetic interference capability and capable of achieving remote measurement, so that the reliability and the measurement precision of the fiber grating force-measuring anchor rod device are improved, and the data transmission distance of the fiber grating force-measuring anchor rod device is increased.

The invention belongs to the field of geophysical exploration. (1) A general transmission method is provided, wherein transmission rate between collection nodes can be adjusted in an optimal mode according to the actual application requirements; (2), the transmission technology is provided, wherein the encoding efficiency is higher and the transmission bandwidth is lower; (3), a device which can achieve longer-distance data reliable transmission can be achieved under the situation of the same effective data transmission. According to the technical scheme, the long-distance wire data transmission device with the adjustable transmission rate as needed is composed of a data receiving interface, a data receiving and forwarding module and a data sending interface, wherein the data receiving interface is mainly composed of a transformer, an MLT-3/NRZI decoder, an interface level matching network, a clock and data recovery, an NRZI/NRZ decoder, a staticizer and an 8B/10B decoder. The device is mainly applied to the geophysical exploration.

The invention provides a data transmission method and system based on a mobile terminal and a mobile terminal. The data transmission method comprises the following steps: a source mobile terminal transmits a service request message, which contains the IP (Internet Protocol) address of the source mobile terminal, to an objective mobile terminal through a mobile switch network, and if a TCP (Transmission Control Protocol)/IP connection request transmitted by the object mobile terminal, which adopts an IP address per se, to the source mobile terminal is received, the source mobile terminal returns the TCP/IP connection request to the objective mobile terminal, and service data in communication interaction is transmitted by point-point IP routing, which is established by the source mobile terminal and the objective mobile terminal. The data transmission method and system based on the mobile terminal and the mobile terminal, provided by the invention, can achieve the communication interaction between the source mobile terminal and the objective mobile terminal through the point-point IP routing so as to improve the distance between mobile terminals and reduce the power consumption of mobile terminals, and is conducive to the transmission of large quantities of data.

The embodiment of the invention provides a symmetric cross-protocol communication method and device for an asymmetric channel. A set of target CTC channels comprises overlapped CTC channels, namely, the total frequency band range of all the target CTC channels covers the frequency band range of the overlapped CTC channels; in cooperation with a chip sending mode of the method, data is sent by using four overlapped channels of a ZigBee end and a WiFi end; even if the data noise of part of channels is very high, data identification can also be carried out through data in other channels; CTC communication from the ZigBee end to the WiFi end is achieved, the utilization rate of overlapped CTC channels can be increased, the data transmission distance from the ZigBee end to the WiFi end is increased, and it is possible to establish symmetric CTC on asymmetric CTC channels.

The invention relates to a 2 nanosecond data line. The process comprises the following steps of: drawing and annealing a Phi 2.6mm copper bar; coating membrane high-density polyethylene during extrusion for insulation and generating a single insulating copper wire line; carrying out pair twisting on the insulating single line without conglutination; leading a plurality of pair twisting lines to form a cable core line by a formed cable; extruding the cable core line and forming a sheath at the periphery by extruding. The sheath comprises a PVC low-smoke halogen-free outer layer and an inside polyester band. The 2 nanosecond data line produced by the process realizes long data transmission distance, high video quality, regular pixel arrangement, clear edge and picture and less vertical black spot and double image in the process of video transmission. The invention also discloses a structure of the 2 nanosecond data line.

The invention discloses methods and devices for transmitting and receiving messages in a network, relates to the field of communication, and aims to solve the problem of the prior network that when amessage transmitting terminal and a message receiving terminal are not in point-to-point connection, the message needing to be sent cannot be bound across devices and circuit boards. The method for transmitting the message comprises the following steps of: mapping the message into a session; dividing the session into at least two session segments; mapping the session segments to a tunnel; and transmitting the session segments by the tunnel. The method for receiving the message comprises the following steps of: collecting the session segments by the header information of the tunnel protocol; and restoring the session segments to the session. The methods and the devices can be used for transmitting and receiving the messages in the network when the message transmitting terminal and the message receiving terminal are not in point-to-point connection.

The invention discloses a telemetry terminal system adopting a GPS satellite. The telemetry terminal system adopting the GPS satellite comprises a collection master station and at least one telemetry terminal, the telemetry terminal system is connected to the collection master station through the GPS satellite, the telemetry terminal comprises a CPU core unit, a GPRS wireless data transmission unit A and a collection controlling unit, the collection controlling unit and the GPRS wireless data transmission unit A are both connected to the CPU core unit, a sensor is externally connected with the collection controlling unit, and the collection master station comprises a GPRS wireless data transmission unit B and a central processor. The telemetry terminal system adopting the GPRS satellite has the advantages that the GPS satellite is adopted to be used as a relay to carry out data transmission, data transmission distance is prolonged, the number of collection master stations is reduced, and a large amount of manpower and material resources are saved.

A method employing ultrahigh frequency RFID reader-writer for ad-hoc network communication is provided. On the basis that a traditional hardware frame is not changed, channel monitoring, frequency division, time division and code division technologies are employed integratedly, an inquiry/response mechanism of a network is established with an inquiry/response principle in an ultrahigh frequency RFID identification technology as a reference, the mutual interference problem of reader-writers in a multi-reader-writer ad-hoc network is solved, and thus the data transmission distance and the network deployment region area are increased greatly.

The invention provides a drop-down detector and a detection system, and relates to the field of high-altitude meteorological detection. The detector comprises a first umbrella cover, a main body part,and a plurality of communication antennas, wherein the main body part is cylindrical, and a meteorological information acquisition and processing device is arranged in the main body part; the plurality of communication antennas are electrically connected with the meteorological information acquisition and processing device, a first end of each of the plurality of communication antennas is movablyconnected with a periphery of the main body part at the same interval, and the second ends of the plurality of communication antennas are connected to an inner edge of the first umbrella cover at thesame interval; and after the detector is put in, the plurality of communication antennas are unfolded towards the periphery by taking the main body part as a center and are fixed at positions forminga first angle with an axis of the main body part so as to support the first umbrella cover. According to the drop-down detector provided by the invention, wind resistance of the detector can be improved, and a data transmission distance of the detector is increased.

A parallel generator system (20) having at least one controller (22, 26) using selective load reduction for load share balancing, and a method for using selective load reduction for load share balancing in a parallel generator system (20).

The invention provides an SPI (serial peripheral interface) bus driving method and system and electronic equipment. The SPI bus driving system is applied to communication through an SPI bus, is a communication network comprising a master communication device and at least one slave communication device and comprises a first conversion module and a second conversion module, wherein the first conversion module is used for converting TTL (transistor-transistor logic) level signals output by the master/slave communication device through the SPI bus into differential signals for long-distance transmission; the second conversion module is used for inversely conversing the differential signals into the TTL level signals and transmitting the recovered TTL signals to the master/slave communication device. The SPI bus driving system has the advantages that the signal output driving capacity and anti-interference of the SPI bus are improved while the workload of a central processing unit is not increased, and the data transmission distance is lengthened.

The invention belongs to the technical field of water level and temperature and humidity detection, and relates to a wireless paddy field water level and soil temperature and humidity sensor. The sensor comprises a cylinder cover, a control cylinder and a core sensing module, the cylinder cover comprises an antenna and a switch, and the core sensing module comprises a water level sensing probe, a humidity sensing probe and a temperature sensing probe. The control cylinder comprises a circuit board and a battery, and the center is provided with a water level conduit channel; and the circuit board comprises a main control chip, a wireless communication module and a sensing circuit module. The main control chip adopts an 8-bit single-chip microcomputer with ultra-low power consumption; the wireless communication module adopts a Zigbee wireless network for transmission; and the sensor circuit module comprises a humidity acquisition part, a temperature acquisition part and a water level acquisition part. The sensor has the advantages of low cost, high precision, good reliability and the like, can realize the long-term real-time online monitoring of temperature, humidity and water level, improves the agricultural planting efficiency, and has the better application prospect.

An embodiment of the invention provides a data communication method, device and system and relates to the communication field. By means of the data communication method, device and system, long-distance file sharing among a plurality of mobile terminals can be achieved. The data communication method comprises the steps that when a sensing device obtains trigger information, a communication server receives the sensing information sent by the sensing device, establishes a first communication channel and a second communication channel respectively corresponding to a first terminal and a second terminal according to the sensing information, and transmits interactive data between the first terminal and the second terminal through the first communication channel and the second communication channel. The data communication method, device and system is applicable to data communication.

The invention discloses a data acquisition system convenient for realizing RS (Remote Sensing) 485 bus networking, which comprises a power supply and a processor, wherein the input end of the processor is connected with a signal time-sharing multiplexing circuit, and the input end of the signal time-sharing multiplexing circuit is connected with a signal acquisition and conditioning circuit. The signal acquisition and conditioning circuit is composed of an analog quantity acquisition and conditioning circuit, a digital quantity acquisition and conditioning circuit and a switching value acquisition and conditioning circuit. The input end of the analog quantity acquisition and conditioning circuit is connected with a sensor group 1, the input end of the digital quantity acquisition and conditioning circuit is connected with a sensor group 2, and the input end of the switching value acquisition and conditioning circuit is connected with a sensor group 3. The output end of the processor is connected with an RS485 bus transceiver, and the output end of the RS485 bus transceiver is connected with an RS485 bus isolation transformer used for connecting an RS485 bus. The data acquisition system has reasonable design and is simple and convenient for use and operation, and the data acquisition system is convenient for realizing RS485 bus networking. According to the data acquisition system, deployments of field acquisition equipment can be reduced, difficulty of field operation can be reduced, and manpower and material costs can be saved.

The invention discloses a wired signal transmission design method based on orthogonal frequency division multiplexing. The method comprises the steps of modeling, analyzing, measuring and parameter reckoning of related elements. And determining design parameters according to the extracted related parameters and data processing requirements, determining a signal-to-noise ratio and transmitting power according to a total bit error rate index of the system and noise characteristics of an application environment, performing system index decomposition and design implementation, and ensuring designreliability through joint simulation verification. The method can be suitable for different wired medium channels, can unify physical layer implementation architectures of different protocol buses, can also be used for improving the physical layer transmission rate of a low-speed bus, and realizes reliable long-distance transmission; moreover, the software and hardware joint simulation verification platform performs simulation verification on system modeling, verification system architecture and design codes, and performs index verification by building a physical prototype system, so that thedesign reliability is improved.

The invention provides a universal serial port conversion and data acquisition card (DAC), mainly comprising a serial port module, a data acquisition module and a network card module. A tested product is connected with the serial port module by a test port, which is used for receiving the test data packets of the tested product; the serial port module sends the received test data packets to the data acquisition module by a serial port of the serial port module; and the data acquisition module collects analog quantity and self-power analog quantity output by the product through a built-in A/D chip of the data acquisition module, sends the data packets transmitted by the serial port module to a personal computer (PC) by the network card module, and receives instruction protocol packets from the PC as well as sends the decoded instruction protocol packets to the serial port module. The universal serial port conversion and data acquisition card provided by the invention is used to solve the problems of short transmission range, low reliability of data transmission, low transmission speed and the like when the product performs data exchange with the PC.

The embodiment of the present application discloses an alarm topology transmission method and related products, wherein the method includes: the alarm addresses the parent node, the parent node forms an alarm system with the alarm, and the alarm has been completed A node paired with a wireless network with a frequency below 1 GHz; the alarm device sends alarm information to the parent node. In the embodiment of the present application, by addressing the parent node of the alarm device that has been paired with the wireless network below 1 GHz, and then performing network connection and data transmission, the transmission distance of the alarm device is extended and the data transmission delay is shortened.