91results about How to "Wide signal coverage" patented technology

The present invention discloses a method for implementing a Push-To-Talk (PTT) service, including: establishing a connection between a terminal and a conference room in a conference system with half-duplex communication mode; receiving a request sent by the terminal and providing the PTT corresponding to the request according to a stored corresponding relation between the PTT services and the requests. According to the method, PTT service talk among conference room members or groups in the conference room is implemented. Embodiments of the present invention also disclose another method for implementing the PTT service, as well as a terminal, a conference application server and a system for implementing the PTT service. According to the embodiments of the present invention, the PTT service with wide signal coverage and small call delay is implemented.

The invention relates to an Ethernet radio network gateway based on a Z-Wave technology. The network gateway comprises an Ethernet module, a protocol conversion module, a Z-Wave communication module and an antenna. The Ethernet module is used for controlling receiving and transmission of network data in an Ethernet network. The protocol conversion module is used for the protocol conversion of an Ethernet network protocol and a Z-Wave communication network protocol. The Z-Wave communication module and the antenna are used for receiving and transmitting of radio signals. The Ethernet module, the protocol conversion module, the Z-Wave communication module and the antenna are connected with one another in sequence. The Ethernet radio network gateway based on the Z-Wave technology not only achieves relatively smooth interconnection and intercommunication of a Z-Wave radio communication network and the Ethernet network and enables a system to which the network gateway is applied to have a wide signal cover range under the condition of no need of arrangement of too many communication nodes through the adoption of the Z-Wave technology, but also has the advantages of being simple in structure, low in cost, little in power consumption, high in efficiency and the like.

The invention discloses an inspection unmanned aerial vehicle system for environment detection based on the Internet, and relates to the technical field of unmanned aerial vehicle systems. The inspection unmanned aerial vehicle system comprises an unmanned aerial vehicle, a ground control terminal and a cloud server, the bottom of the unmanned aerial vehicle system is provided with a camera component, the inner portion of the unmanned aerial vehicle system is provided with a flight control system, an airborne communication module, a posture control module, a data processing module and an environment detection module, the data processing module comprises a data contrast module, a graph generating module and an alarm module, and the data contrast module is connected with the graph generating module and the alarm module separately, the ground control terminal is provided with an alarm unit, and the ground control terminal and the cloud server are in wireless connection through a 4G network. According to the inspection unmanned aerial vehicle system for the environment detection based on the Internet, wireless remote communication is carried out, the signal coverage is broad, the signal transmission is convenient, the equipment investment is small, functions are diverse, the flight posture can be automatically adjusted according to actual conditions, and the stability is good.

The invention discloses a multi-functional identity identifying device and a system. The multi-functional identity device comprises a positioning model which is a GPS positioning model or a Beidou positioning model and used for obtaining the present position information; a storage which is used for storing the data comprising the identity information; a radio communication model which is used for transmitting and receiving the data and realizing the data interaction with a remote monitoring center; a cell which is used for supplying power to a microprocessor; and the microprocessor which is adopted as a main control unit and used for coordinating the operation of each model. The multi-functional identity identifying device and the system have radio communication function and positioning function.

The invention provides an old people nursing pulse watch, which is used for solving the problems of inaccurate pulse monitoring, untimely information transmission and inconvenience in communicating and carrying existing in a conventional pulse monitoring device. The old people nursing pulse watch comprises a pulse acquiring device, a main control device and a watch display panel, wherein the main control device is connected with the pulse acquiring device; the watch display panel is connected with the main control device; the main control device comprises a positioning device, a signal transmitting device and a main processor used for controlling the positioning device and the signal transmitting device; the main control device is connected with the pulse acquiring device; the signal transmitting device comprises a data signal transmitting device and a short message signal transmitting device; the data signal transmitting device is used for transmitting pulse information acquired by the pulse acquiring device to a data receiving device through an Internet of things server; the short message signal transmitting device is directly communicated with the data receiving device.

The invention belongs to the field of elevator safety monitoring, and discloses an internet-of-things-based elevator group safety operation on-line monitoring and fault diagnosis system. The system comprises information acquisition terminals, a mobile communication network, a communication gateway, an on-line monitoring and diagnosis platform, factory terminal modules, maintenance unit terminal modules and property terminal modules; the mobile communication network is connected with the on-line monitoring and diagnosing platform through the communication gateway; the on-line monitoring and diagnosing platform comprises an information processing and controlling module, a WEB server, a data server and an industrial personal computer, wherein the WEB server, the data server and the industrialpersonal computer are connected with the information processing and control module; the information processing and control module is composed of a system configuration module, an elevator managementmodule, a personnel management module, a fault management module and a diagnosis management module; and the WEB server is connected with a mobile terminal. According to the system, the management system is improved, the fault occurrence and diagnosis time is shortened, and the system has wide application prospects.

The invention provides a passive remote emergency button and an application method thereof. The emergency button is used for achieving a remote help-seeking function through pressing a key in needs or emergency. The emergency button comprises a magneto-electric induction device, an eMTC communication module group, a central processing unit, a central processor unit, a power management unit, a rectification processing unit, a button device body, and an energy storage capacitor. The emergency button does not need an external power supply or a battery for power supply through combining the eMTC communication technology with the passive magneto-electric induction device. There is no need of an additional GPS or other positioning chip, and the emergency button achieves the locating of a device. The emergency button is very wide in signal coverage, and the communication distance can reach several kilometers. The emergency button supports the positioning of a moving object, and can achieve the connection with a remote platform. The emergency button is low in cost, is small and exquisite in appearance, can be installed and fixed freely, and is good in market prospect.

The present invention discloses a radio frequency tag identification system based on multiple antennas. An antenna activation source comprises a memory configured to store the ID coding of each low-frequency antenna and the ID coding of the antenna activation source, a low-frequency radio-frequency circuit and a plurality of low-frequency antennas connected with the low-frequency radio-frequency circuit. A power control circuit located between the low-frequency radio-frequency circuit and a master control circuit is configured to regulate the antenna transmitting power. A double-frequency radio frequency identification includes: a low-frequency receiving antenna configured to receive low-frequency radio-frequency signals from the antenna activation source and generate inductive signals consisting of signal source codes; a low-frequency circuit configured to generate low-frequency information signals according to the inductive signals from the low-frequency receiving antenna; a high-frequency circuit configured to modulate intensity identification signals, signal source codes and radio frequency identification ID numbers to coding signals; and a high-frequency antenna configured to emit the coding signals to the space through a high-frequency carrier. The radio frequency tag identification system based on multiple antennas is able to increase the coverage area of low-frequency signals and improve the stability of low-frequency signals, the signal coverage area is adjustable, and radio frequency tag identification system based on multiple antennas may be suitable for more different application environments.

The invention discloses a wireless non-light of sight gigabit Ethernet transmission system based on 700-1100 MHz variable frequency. The transmission system comprises a terminal device and a front-end device. The terminal device comprises a first RF antenna, a first bi-directional RF power amplifier, a first variable frequency transceiver chip, a first baseband data processing chip, an Ethernet function conversion module, a multi-port switch and a first RJ45 interface. The front-end device comprises a second RF antenna, a second bi-directional RF power amplifier, a channel selector, a plurality of transmission channels, a 1000base switch, a master control CPU and a second RJ45 interface. The whole transmitting-receiving process of the Ethernet transmission system adopts a TDD way; the front-end device comprises the transmission channels including variable frequency transceiver chips and baseband data processing chips, so that the data transmission bandwidth can be multiplied; frequencies are only emitted by one transmission channel at the same time, so that same frequency interference is avoided; and multi-channel Ethernet data are aggregated under the coordination of the 1000base switch.

The invention discloses a remote driving system and method based on 4G network communication. The remote driving system comprises a simulator part and a vehicle terminal part, wherein the simulator part comprises a steering wheel and an accelerator brake pedal, and is connected with a control room host through a serial port to simulate real driving and acquire a control signal; the vehicle terminal part adopts a STM32 single-chip microcomputer; two GPIO pins of PA9 and PA10 are led out to serve as serial ports I which are connected to an industrial control computer of a vehicle through a USB;two GPIO pins of PA2 and PA3 are led out to serve as serial ports II which are connected to a 4G module; and when a simulator in a remote cockpit generates a control signal, the signal is transmittedto the STM32 single-chip microcomputer through a serial port, transmitted to the 4G module through a cloud end, and transmitted to the single-chip microcomputer through the serial ports II, and data is controlled in a CAN protocol format to be transmitted to the industrial control computer through the serial port I to control vehicle running. The remote driving system and method have the advantages of moderate technical requirements, wide coverage of 4G signal and relatively low development cost.

The invention discloses an NB-IoT-based object overturn early warning system comprising multiple detectors, a cloud server and multiple early warning terminals. Each detector is provided with a shellused for being fixed on the measured object, a PCB arranged in the shell and a monitoring circuit arranged on the PCB. The monitoring circuit is provided with an MEMS inertial sensor module which is fixed on the central position of the PCB and used for sensing the six-degree-of-freedom parameters of the space motion of the measured object in real time, an AM2302 environmental temperature and humidity monitoring sensor module which is used for sensing the surrounding environmental temperature and humidity parameters of the measured object, an NB-IoT data module which is used for transmitting the degree-of-freedom parameters and the environmental temperature and humidity parameters and a 32-bit low-power-consumption STM32F103C single-chip microcomputer which is used for preprocessing the degree-of-freedom parameters and the environmental temperature and humidity parameters. The cloud server and the detectors form wide area internet of things communication connection through a wide area internet of things NB-IoT base station for transmitting early warning signals. Multiple early warning terminals are connected with the cloud server in a communication way through the wide area internetof things and used for receiving the early warning signals.

The invention relates to the field of power, in particular to a pole gradient detection system and method. The pole gradient detection system comprises a control module, a gradient angle detection module, a communication module, a remote terminal, a solar cell panel and a storage. The system can monitor the gradient of a power transmission rod wirelessly in an unmanned way. A solar rechargeable battery is used as a power supply system, so that the pole gradient detection system is environmentally friendly, and the staff cost on equipment maintenance is lowered. Moreover, the problem detectiontime is greatly shortened, and powered technical guarantee is provided for maintenance staff. Data is transmitted in a GPRS wireless transmission way, so that a wide signal coverage area and reliableand stable data transmission are realized. the real-time state of each pole can be monitored with a remote terminal in order to fulfill the aim of improving the working efficiency of power grid maintenance staff.

The invention discloses a distribution network automation communication system, which is characterized in that an optical fiber access device (1) is connected to four optical modems (4) and a wireless public network acquisition device (3) of a first feeder terminal unit (9), the optical modems (4) adopt a double-loop network connection mode, connected nodes are connected in series in a bidirectional closed-loop manner, one of the optical modems (4) is connected to a first network switch (5), the first network switch (5) is connected to a communication management machine (7) connected with a switch cabinet (8), one of the optical modems (4) is connected to a second network switch (6), the second network switch (6) is connected to a carrier acquisition device (2) connected with a second feeder terminal unit (10), and one of the optical modems (4) is connected to a transformer terminal unit (11). The distribution network automation communication system is stable and reliable in communication, wide in coverage range and high in self-healing capacity.

The invention provides a LoRaWAN-based Internet-of-Things communication extension method and a LoRaWAN Internet of Things, and the method comprises the steps: building a LoRaWAN network which comprises a LoRaWAN gateway, a collector and a server; enabling the to-be-accessed terminal node to adopt a LoRaWAN terminal mode to send a registration request to the LoRaWAN gateway, and when feedback information of the LoRaWAN gateway is not received within a first preset feedback time, switching the to-be-accessed terminal node to the LoRa terminal mode to send the registration request to the collectors arranged in the collector channels, and receive the feedback information of the collectors, establishing communication connection with the collector corresponding to the signal intensity value in the strongest feedback information so as to construct a collector private network; and achieving relay forwarding of an uplink frame and a downlink frame of a to-be-accessed terminal node by adopting a collector for establishing communication connection, storing and updating registration information of the to-be-accessed terminal node, and sending the registration information to a server. The beneficial effects of the invention are that the LoRaWAN network and the collector private network do not interfere with each other, thereby achieving the blind area coverage of the LoRaWAN.

The invention discloses a double-frequency electronic label system. An antenna activation source of the system comprises a memory used for storing each low-frequency antenna ID code and an antenna activation source ID code; a low-frequency radio frequency circuit and a plurality of low-frequency antennas connected with the low-frequency radio frequency circuit, wherein the low-frequency radio frequency circuit comprises an and gate and a power MOS tube driving module which are connected in series, the and gate is used for modulating a data signal from a main control circuit into a 125 KHz carrier signal and forming a low-frequency activation signal; a power control circuit arranged between the low-frequency radio frequency circuit and the main control circuit, wherein the power control circuit is used for adjusting the emission power of the low-frequency antennas; and the main control circuit, wherein according to a set work mode, the main control circuit utilizes the low-frequency radio frequency circuit to generate low-frequency activation signals containing the low-frequency antenna ID codes, the antenna activation source ID code and work mode information based on the low-frequency antenna ID codes and the antenna activation source ID code received from the memory. According to the invention, the coverage range of the low-frequency signals is increased, the stability of the low-frequency signals is improved, and the interference problem among the antennas is solved.

The invention belongs to the technical field of Internet of Things application, and discloses a fire safety online early warning system based on Internet of Things, which comprises an information acquisition system, an information processing system and a terminal early warning system, wherein the information acquisition system comprises a fire-fighting facility, a signal acquisition unit and a wireless networking module; the information processing system comprises a data processing unit and a data transmission unit; the terminal early warning system comprises a cloud server, a field operationterminal and an online early warning service application. In conclusion, early warning of each fire-fighting facility can be timely and accurately realized based on the fire safety online early warning system; moreover, a wireless networking module is arranged in a front-end information acquisition system, so that a wireless data transmission communication networking mode is adopted for front-endsignal acquisition, wall penetration, road breaking and complicated line laying during construction can be avoided, and the whole early warning system is very convenient to install, debug and maintainin the later period.

The present invention discloses an antenna activation source for identifying a radio frequency with a dynamic and adjustable distance. The work mode of the antenna activation source comprises the number of the effective antennas, the work order of each antenna, the emission power of each antenna and the work time of each antenna; the other ends of a second dial switch, a RS485 communication circuit and a high frequency wireless module are connected with a master control circuit, and the RS485 communication circuit realizes the configuration of the master control circuit work mode through signals from the network; the master circuit allows the low-frequency antenna ID coding and antenna activation source ID coding from a memory to generate low-frequency activation signals including low-frequency antenna ID coding, antenna activation source ID coding and the work mode information according to the setting work mode; and the antenna activation source also includes a signal indication light connected with the master control circuit configured to display the work state of the antenna activation source. The signal covering range is adjustable, and the antenna activation source for identifying radio frequency with a dynamic and adjustable distance can be suitable for different application environments.

The invention discloses a control system of an intelligent curtain. The control system comprises a curtain, an illumination sensor, a wireless signal transmitting / receiving device, a controller, motors, a rolling rod and a mobile terminal, wherein the illumination sensor is connected to the wireless signal transmitting / receiving device; the mobile terminal is connected to the wireless signal transmitting / receiving device via a wireless network; the wireless signal transmitting / receiving device is connected to the controller; the controller is connected to the motors; shafts of the two motors are connected to the left and right ends of the rolling rod; and the rolling rod is connected to the upper end of the curtain. A problem of existing curtains that the interior of an office or a residence is excessively exposed to sunlight or rain and furniture gets damaged since the existing curtains are in lack of a function of reminding regulating and controlling to get closed in the case of weather changes such as rain or too strong illumination after people leave away from the office or residence can be solved.