31results about How to "Increase the frequency of sending" patented technology

The invention relates to a Beidou-based marine monitoring buoy and specifically relates to a Beidou satellite based augmentation system and short message function-based marine monitoring buoy which mainly comprises a buoy sensor, a data processing unit, a Beidou satellite based augmentation receiver, a Beidou short message communication module, a laser range finding radar, a triaxial accelerometer, a disk shaped outer shell, an anchoring system and a power supply system. The marine monitoring buoy disclosed in a technical solution of the invention can be used for real time monitoring of meteorology and hydrology information of marine wind directions, wind speed, temperature, humidity, air pressure, rainfall, visibility, water temperature, salinity, waves, ocean currents and the lie; the information can be sent back to a ground monitoring center according to needs, and a centimeter grade high precision positioning function can be fulfilled; a anti-collision alarm function, a theft positioning and tracking function and the like can also be fulfilled.

The invention discloses a soft system test method and system, the method comprises: a heartbeat sending side calculates the soft heartbeat sending frequency and overtime time according to loads of the sender and current link condition and informs a heartbeat receiver, the heartbeat receiver calculates the soft heartbeat sending frequency itself can burden according to the loads of receiver and current link condition, the heartbeat receiver compares the soft heartbeat sending frequency itself can burden with the heartbeat sending frequency calculated by the heartbeat sender, if the heartbeat sending frequency of the heartbeat sender is smaller than the calculated value by itself, then the heartbeat sender is informed to send the soft heartbeat according to the calculated sending frequency by the heartbeat sender, otherwise, the heartbeat sender is informed to send the soft heartbeat according to the calculated sending frequency by the heartbeat receiver; the system comprises a heartbeat sender and a heartbeat receiver. The invention achieves dynamically adjusting the sending frequency of the soft heartbeat according to the practical operation condition, and the system resources are adequately and reasonably utilized.

The embodiment of the invention provides a data transmission method and device, a medium and electronic equipment. The data transmission method includes: periodically detecting round trip time and/ora packet loss rate at the time when data packets are transmitted through a network; and in a case where the transmitted data packets carry redundant data packets, reducing or stopping the carried redundant data packets when frequency of detecting a situation that the round trip time is less than preset round trip time and/or the packet loss rate is less than a preset packet loss rate is greater than or equal to set frequency. Through the method of carrying the redundant data packets in the transmitted data packets, and reducing or stopping the carried redundant data packets when a case where the frequency of the situation that the round trip time is less than the preset round trip time and/or the packet loss rate is less than the preset packet loss rate is greater than or equal to the setfrequency occurs, the technical solution of the embodiment of the invention increases sending frequency of the redundant data packets when a network environment is poorer, reduces the packet loss rate, then shortens the round trip time, reduces delay, and improves user experience.

The invention discloses a double-antenna handover system in the GSM-R (global system for mobile communication for railway) network and a method thereof. The double-antenna handover system comprises a head antenna provided with user identification codes, a tail antenna provided with user identification codes and a controller used for controlling received signals and transmitted signals of the head antenna and the tail antenna and handover of functions. By channel adjusting and coordinate of the head antenna and the tail antenna, seamless handover in the GSM-R network is realized, communication quality in the high-speed environment is greatly improved, and for a single-antenna handover process, time for transmitting measuring reports is shortened, and transmission efficiency is high.

The invention discloses a radioactive source detector which comprises a shell, a circuit board in the shell, and a rechargeable battery which supplies power to the circuit board. A G-M counter, a GPS positioning module, a data processing module, an RFID shortwave communication module, a GSM wireless communication module, an RS485 communication module and a power supply management module are integrated in the circuit board. The searching method of the radioactive source detector comprises the steps that (1) the radioactive source detector is installed on a radioactive source storage tank, (2) the radioactive source detector sends information to other electrical equipment through an RS485 serial port, (3) the radioactive source detector sends an RFID signal to the periphery and receives a feedback signal at the same time, (4) after loss, the radioactive source detector sends an RFID signal to the periphery and searches the feedback signal sent by other radio equipment, and sends data to a monitoring center at the same time. According to the radioactive source detector and the searching method, the positioning speed and accuracy of a lost radioactive source can be improved, and thus the harm to an environment and a human body by the loss of the radioactive source is reduced.

The invention relates to a network, in particular to a PA PROFIBUS network having redundant properties and a linear topology. Two line ends (E1, E2) are connected to a redundancy manager (RM) which disconnects said line ends (E1, E2) in error-free conditions and connects them in error conditions. Said redundancy manager (RM) supplies voltage to the first line end (E1) for operating customers' mobile telephones (Fi-F4) each of which is connected to the network (11) by a branching unit (T1-T4). After receiving a supply voltage on one connection thereof, said branching units (T1-T4) check the state of a cable (H1-H5) which is connected to the other network connection and transmit the supply voltage in the faultless condition thereof only. When the redundancy manager (RM) does not detect the supply voltage on the other end of the line end (E2) at least during a predetermined space of time after voltage supply, said redundancy manager supplies the voltage thereto. A cable (H2) having a disturbance (12) is then disconnected from the line by the adjacent branching units (T1-T3).

The invention provides airborne Beidou equipment, a parameter updating method thereof and a command and control system. According to the technical scheme, the airborne Beidou equipment receives a short message change instruction through a first interface or a second interface and sends a short message according to the updated parameters in response to the short message change instruction, and theshort message change instruction is used for indicating the airborne Beidou equipment to update the parameters of the short message. That is to say, in the technical scheme, the airborne Beidou equipment can change the parameters for sending the short message according to the received short message change instruction, for example, the message is sent at a higher sending frequency, so that the complete message can be quickly sent down under the condition that the sent message is relatively long.

The invention provides a visibility detection system and method and a computer readable storage medium. The system comprises a plurality of visibility detection stations which are used for detecting the atmospheric visibility information of a located position; a data acquisition and analysis base station is connected with the visibility detection stations in a wired or wireless mode; and the dataacquisition and analysis base station receives the atmospheric visibility information measured by the visibility detection stations in real time, and fits the visibility information of each station. The visibility detection system detects the real-time visibility of each station through the visibility detection equipment to judge the occurrence range and the moving direction of agglomerate fog, calculates the visibility danger level and the moving direction of the agglomerate fog according to the calculated data, sends the visibility danger level and the moving direction of the agglomerate fogto the expressway monitoring center and gives an early warning to inform a driver.

The invention discloses a near space communication control system and method for an aircraft and the aircraft. The communication control system comprises a first antenna unit, a second antenna unit and a communication terminal machine. The terminal machine comprises a signal processing module used for obtaining a first preset frequency band communication signal received by the antenna unit and sending a second preset frequency band communication signal to the antenna unit; a multi-card management module which is used for controlling the plurality of transceiving channels to receive the communication signals or transmit the to-be-transmitted data according to a preset transmitting time sequence; a storage module which is used for storing the communication signal and the to-be-transmitted data; and a communication control module which is used for acquiring the communication control instruction, judging the effectiveness of the communication control instruction, controlling the multi-cardmanagement module to receive the communication signal or transmit the to-be-transmitted data according to the communication control instruction, and acquiring the state data of the terminal machine.Double antennas and multi-card time slot multiplexing are adopted to transmit and receive signals, high dynamic adaptability is improved, and sending frequency is improved.

The invention discloses an OLSR routing protocol control information dynamic generation method. An OLSR routing protocol transmits a control message at a fixed control message interval to obtain the link states of surrounding nodes, so that a routing table from a source node to a target node is established. A control message in a fixed period cannot adapt to dynamic change of network topology, andnodes cannot sense node movement and network topology change in an environment with dynamic change of the network topology, so that topology information is out of date. In an environment in which thenetwork topology changes slowly, the OLSR broadcasts a control message periodically, which increases the routing overhead. Based on the defects of a standard OLSR protocol, the sending frequency of HELLO messages is dynamically adjusted according to the change condition of a node neighbor table, and the sending frequency of TC messages is dynamically adjusted according to the change condition ofan MPR Selector set of MPR nodes. Through the method, the routing overhead of the OLSR protocol is greatly reduced.

The invention provides an integrated bullet which comprises a bullet head, a powder cavity and a primer. The powder cavity is a sealed cavity defined by the bullet head and a cavity shell, and propellant powder or explosives are contained in the powder cavity. The cavity shell and the bullet head are integrally formed, and a destroying opening and a primer groove are further formed in the cavity shell. The primer is contained in the primer groove, and the primer groove is sealed by a primer cover. According to the integrated bullet, the bullet is made to be of an integrated structure, a disposable bullet shell does not need to be specially arranged, the firing accuracy and the firing range are improved, materials are saved, and the carrying weight is reduced.

The invention relates to a vehicle sensor system for locating objects situated in the surroundings of the vehicle, said sensor system having at least one transmitting element, wherein the at least one transmitting element has a bandwidth at a transmission frequency and is designed to transmit ultrasound signals at the transmission frequency, and a receiving element functionally separated from the at least one transmitting element. The at least one receiving element has a bandwidth at a center frequency and is designed to receive ultrasound signals that are reflected by the objects surrounding the vehicle. The sensor system is characterized in that the bandwidth of the receiving element is greater than the bandwidth of the transmitting element.