15results about How to "Long communication distance" patented technology

The invention discloses a method for remotely upgrading equipment, which is applied to a control end, the control end comprises a cloud platform, a server and a LoRaWAN gateway, and the method comprises the following steps: responding to an upgrading operation instruction by utilizing the cloud platform so as to send an upgrading inquiry request to the server; using the server and the LoRaWAN gateway to transmit the upgrade inquiry request to a device end; and the cloud platform, the server and the LoRaWAN gateway are utilized to respond to upgrade confirmation information returned by target equipment so as to transmit an upgrade package to the target equipment, and the target equipment belongs to the equipment end. Through the method, the defect that long-distance wide area network equipment can only be subjected to short-distance remote upgrading through Bluetooth is overcome, and the method is more suitable for a large breeding scene.

The embodiment of the invention discloses a wireless fidelity channel determination method and device, a client and a storage medium, which are used for determining a target channel according to interference information of a plurality of channels detected by a wireless access point device and at least one client so as to switch to the target channel for communication. As the target channel is not determined only according to the interference information of the plurality of channels detected by the wireless access point equipment, the communication distance covered by the large probability is farther. The method comprises the steps that interference information of multiple channels detected by wireless access point equipment and at least one client is acquired, the at least one client is a client accessing a target wireless access point, and the target wireless access point is a wireless access point opened by the wireless access point equipment; and determining a target channel according to the interference information of the plurality of channels detected by the wireless access point equipment and the at least one client, so as to switch to the target channel for communication.

The invention discloses a Lora-based omni-directional unvarnished transmission type wireless communication system and method, and belongs to the technical field of wireless communication, and the Lora-based omni-directional unvarnished transmission type wireless communication system comprises a relay end; the transmitting end and the receiving end are in wireless signal connection with the relay end, the transmitting end is located in a coverage area with a mobile network, and the receiving end is located in a coverage area without the mobile network; during data downlink, master station data transmitted by the transmitting end is transmitted to the receiving end through the relay end; and when the data is uplink, reply data transmitted by the receiving end is transmitted to the transmitting end through the relay end. A wireless sender receives TCP / IP protocol data frames and extracted user data, namely IEC104 protocol data through a network cable and then sends the data, only IEC104 protocol effective data frames are transmitted in limited wireless bandwidth resources, and a receiver receives the IEC104 protocol data frames of a wireless network, then packages the IEC104 protocol data frames according to TCP / IP protocol rules and transmits the IEC104 protocol data frames to a power distribution module or a 4G communication module through the network cable. The transmission speed is fast, the communication distance is long, and the anti-interference capability is strong.

This invention discloses an underwater acoustic modem based on STM32 and Raspberry Pi, belonging to the field of underwater acoustic communication technology. Compared with previous modems, this invention improves upon the shortcomings of DSP-based modems, which are characterized by high cost, difficult development, and relatively poor system compatibility; and software-defined radio architecture modems, which are characterized by high hardware cost, high power consumption, and unsuitability for deployment in underwater communication networks. Furthermore, most existing modems cannot simultaneously guarantee communication distance and low bit error rate. This invention utilizes a low-power, low-cost STM32 chip and Raspberry Pi as the core board for modem development. With Raspberry Pi as the software core, it offers faster speed, larger memory, and easier development and expansion. The device size is reduced through a self-designed MCU, meeting the requirements of underwater network nodes. It also employs an adaptive autocorrelation threshold algorithm, enabling the demodulator to adapt to various underwater environments during frame synchronization, while achieving longer communication distances and lower bit error rates.

The invention discloses a cooperative target recognition system based on a corner reflecting prism, and belongs to the technical field of target recognition, and the recognition system comprises a control processing unit, a light wave transmitting device, a reflected light receiving device, a corner reflecting prism and a rotation control device of the corner reflecting prism. The control unit can control the light wave emitting device to emit a light wave band with a specific frequency, then a receiver is provided with a circle of eight corner reflecting prisms capable of rotating along with a rotating shaft in the middle, and light waves generated by a sender are reflected to the receiver. The reflected light receiving device can identify different rotation frequencies of the corner reflecting prism by receiving reflected light waves, so that cooperative target identification can be accurately carried out, the reflecting prism of the device reflects signals with high reflectivity, 360-degree omnidirectional identification is realized, the system reliability is improved, on one hand, an invisible light identification technology can be adopted, and on the other hand, the system reliability is improved. Therefore, the recognition efficiency and accuracy are greatly improved, and the cooperative target recognition capability is enhanced.

This invention proposes a composite rod-type magneto-electro-mechanical antenna and its fabrication method, belonging to the field of mechanical antenna technology. It solves the problems of low power capacity, weak radiation capability, and short communication distance commonly found in existing magneto-electro-mechanical antennas. It comprises a magnetostrictive layer, two transition layers, two sets of driving layers, and two sets of tail mass blocks. The magnetostrictive layer is located at the center, with the transition layer, driving layer, and tail mass blocks arranged sequentially from the center to both ends on either side. Each driving layer is composed of multiple piezoelectric ceramic rings and multiple electrode sheets stacked alternately. Each tail mass block consists of mass block one, a disc spring, and mass block two connected sequentially. The length of this composite rod-type magneto-electro-mechanical antenna is comparable to that of a traditional three-layer magneto-electro-electric antenna. When the antenna adopts the first-order longitudinal mode, it can operate in the very low frequency band. Depending on different application requirements, the composite rod-type magneto-electro-mechanical antenna of this invention can adopt the second-order longitudinal mode or operate in other frequency bands.

The invention discloses a counting device and system with a multipoint networking communication function. The counting device comprises a communication unit, a counting unit, a rechargeable battery unit and a display unit which are connected with an MCU micro-control unit. The communication unit comprises a USB to UART communication module and a TTL-to-485 communication module and is used for being in communication connection with an external upper computer. The counting unit comprises a counting sensor, an address dial switch and a counting reset key, the address dial switch is provided with a plurality of switch positions, and each switch position can correspondingly generate an address code; the rechargeable battery unit comprises a charging management module, a rechargeable battery and a power management module which are connected in sequence. According to the counting device and system, monitoring data can be transmitted and recorded in real time, the timeliness and accuracy are improved, and a plurality of counting devices can be subjected to multipoint networking communication and simultaneous cooperation, so that the monitoring data of a plurality of counters are transmitted to the same upper computer to be analyzed and processed.

The invention discloses a bus communication distance prolonging method and a bus communication system, and belongs to the field of bus communication, and the bus communication distance prolonging method comprises the following steps: a communication host communicates with a plurality of communication terminals through a communication bus; signal relay processing is set on the communication bus, and the signal relay processing is divided into receiving processing and sending processing; before the signal is distorted, the received data sent to the communication terminal by the communication host is analyzed, rectified and forwarded by utilizing sending processing, so that the data signal of the data sent to the communication terminal by the communication host can still be kept undistorted under long-distance transmission; and the received data issued by the communication host is analyzed by utilizing receiving processing, and after wave shaping, the data is sent to the communication terminal in an original mode through sending processing. According to the invention, the problem of short communication distance between the communication host and the communication terminal equipment in synchronous bus communication is solved.

The application discloses a miniaturized vehicle-mounted co-constructed dual-frequency antenna integrated with a double-passband filter, which comprises a double-sided FR4 dielectric PCB board, and the PCB board is sequentially provided with a top metal layer, a dielectric substrate and a bottom metal ground layer from top to bottom. The application relates to the technical field of mobile communication vehicle-mounted antennas. The miniaturized vehicle-mounted co-constructed dual-frequency antenna integrated with the double-passband filter is directly pasted on the same side of the antenna feed end through a filter element, does not need a separate filter to occupy a position, and the overall PCB occupies a board area of more than 30% reduction, can be directly embedded into a rearview mirror shell, a shark fin antenna and an OBU compact PCB, perfectly adapts to a narrow installation environment of a vehicle-mounted antenna, greatly reduces transmission link loss, cancels a plurality of microstrip connecting lines and independent matching networks, eliminates multiple connection parasitic reflection loss, and simultaneously shortens a radio frequency signal transmission path; the communication distance is farther under the same transmission power of a transmission end, the sensitivity of a receiving end is obviously improved, vehicle-mounted power load is reduced, and V2X safety signal reliable reception is ensured.

The present invention is applicable to the field of repeater technology, and provides a communication range extension method, device and terminal equipment, which are applied to the communication range extension system, and the communication range extension system includes an operation control device, a controlled device, a signal repeater, a buoyancy balloon and a height fixing line; the communication range extension method includes: the operation control device receives a range extension instruction, and the range extension instruction includes a preset height of the signal repeater; according to the range extension instruction, the length of the height fixing line and the traction buoyancy value that the buoyancy balloon needs to reach are calculated; safety gas is input into the buoyancy balloon until the buoyancy of the buoyancy balloon reaches the traction buoyancy value; the signal repeater is towed to a preset height and fixed by the buoyancy balloon. Through the present invention, the height of the signal repeater can be adjusted at any time to avoid the problem of obstacles caused by environmental changes and increase the communication distance.

The application discloses a kind of robust fast secret channel construction methods for amplitude using CSS spread spectrum modulation, mainly solve the problems, such as the limited transmission distance and capacity of secret channel in the existing low-power wide-area network environment, steps include: the modulation method design of secret channel;Signal frame structure design and frame detection;The demodulation method design of secret channel;Analysis is carried out to the information loss in the demodulation process of secret signal.The application designs the LoRa physical layer secret channel modulated by amplitude using CSS spread spectrum modulation method, designs the modulation and demodulation method of secret channel, analyzes the information loss in the demodulation process of secret signal, constructs the robust fast secret channel, widens the construction scene of secret channel, and the operation method is simple and clear, has practical value.

The utility model relates to the technical field of metal tags, in particular to an ultrahigh-frequency anti-metal tag, which is characterized in that an antenna is arranged on a PCB (printed circuit board) bottom plate, the left side and the right side of the antenna are rectangular, the width of the left side and the right side of the antenna is close to that of the PCB bottom plate, the middle part of the antenna is thin-strip-shaped but not connected, the thin-strip-shaped end part of the middle part of the antenna is a gold immersion area, and a die bonding point is arranged in the middle of the gold immersion area; according to the utility model, the frequency is calculated according to the dielectric parameters of the material of the PCB base plate, and various factors are comprehensively considered, so that the size and the shape of the antenna are further designed; compared with the prior art, the reading distance is increased from 13 meters to 17 meters, and farther communication distance and more stable working performance are realized.

The present invention discloses a throwing type intrinsically safe self-releasing networking base station, which is composed of a base station control system, a 360° elastic release arm mechanism, a lifting mechanism and a limit frame; the 360° elastic release arm mechanism constitutes the overall frame structure of the base station, the base station control system and the lifting mechanism are installed inside the frame composed of the 360° elastic release arm mechanism, the limit frame is installed at the top of the lifting rod of the lifting mechanism, and moves with the lifting rod, and the limit frame is used to limit the release and opening of the 360° elastic release arm mechanism. When the lifting mechanism starts to rise, it drives the limit frame to rise, and the 360° release mechanism is self-released, so that the base station in a horizontal state is erected vertically to the ground. This base station is suitable for complex environment ground, and can realize automatic deployment and self-networking.

The utility model relates to a kind of dog training device with wireless fence and forbidden area blocking function, including remote controller and receiving device set on pet necklace, the remote controller is integrated with ultra-wideband positioning module, wireless control module, button input module, display module and control processing module, can realize forbidden area boundary setting and the switching of three kinds of working mode.The receiving device includes positioning response module, signal receiving module, control execution module and behavior feedback module, can be according to the instruction of remote controller, to pet carries out electric stimulation, vibration or sound prompt etc. behavior feedback, to realize the effective control of pet.The utility model has the advantages of clear structure, high function integration, with accurate positioning, timely response and feedback mode variety, suitable for pet behavior management in multiple scenes.

The present invention provides a method and system for determining the current signal light color of a lane based on V2X technology, including: step S1: RSU equipment broadcasts map information of a local area and traffic light messages at intersections; step S2: OBU equipment obtains the signal light phase information of the current intersection based on the map information and traffic light messages at intersections broadcasted by the RSU; step S3: obtains the GPS longitude and latitude information of the vehicle through the OBU equipment, and calculates the real-time vehicle lane and lane phase information in combination with the map information broadcasted by the RSU equipment; step S4: obtains the current signal light color of the lane where the vehicle is located in combination with the signal light phase information and lane phase information. The present invention effectively solves the problems of reduced recognition rate and misidentification of the vehicle's own sensing equipment when encountering bad weather, thereby improving driving safety; it can broadcast traffic light information at intersections to all surrounding vehicles equipped with V2X equipment, thereby improving information coverage.