430results about How to "Long communication distance" patented technology

In a wireless IC tag, metallic antennas are deposited as thin films on the front and back surfaces of a spacer, made of a heat-resistant glass epoxy material having a desired dielectric constant, to form a first antenna and a second antenna. An IC chip is mounted in the center of the first antenna. The second antenna functions as an auxiliary antenna for resonating to a desired frequency of a transmission radio wave of the first antenna to strengthen the intensity of the radio wave. Accordingly, even when the IC tag is mounted to a cable or the like, the tag can be mounted in the interior of the enclosure of the cable and thus the radio wave intensity of the first antenna can be prevented from being weakened by a metallic member in the cable.

A radio IC tag includes a first antenna and a first spacer, and is arranged so as to generate an operating power by a radio wave received at the first antenna and having a predetermined frequency, operate an IC chip using the power, read out identification information stored in the IC chip, and transmits the identification information, further includes a second antenna having a predetermined length for resonating with the radio wave having the predetermined frequency, and a second spacer provided between the first antenna and the second antenna for holding a distance between the both antennas.

An antenna module and a portable communication terminal equipped with the antenna module are provided. The antenna module has a space-saving design, and also has both a capability for long communication distance for a tag function and a capability for wide communication range for a reader / writer function. A first antenna coil (11) for communication with a reader / writer and a second antenna coil (12) for communication with an IC tag are disposed on a base substrate (10). The first antenna coil (11) is disposed in an outermost periphery section of the base substrate (10) so that a communication distance is attained. The second antenna coil (12) is disposed within an inner periphery of the first antenna coil (11) so as to achieve overall size reduction of the module.

A radio frequency (RF) device includes an RF transceiver, an RF antenna, and a magnetic signal detector. The RF is selected to be in the very high frequency (VHF), ultrahigh frequency (UHF), or super high frequency (SHF) bands such that the shielding effect is reduced and the RF device can be configured as a SIM card disposed inside a cellular phone with an increased RF communication range. The magnetic signal detector is used to sense a magnetic field signal from an RF reader, which includes an RF transceiver, an RF antenna, and a magnetic signal transmitter. The longer communication range afforded by the VHF, UHF, or SHF bands is reduced by the sensing of the magnetic field, thereby providing a communication range control, while the RF device and the RF reader exchange information through the RF channel with improved security as a result of the range control.

The invention provides an LED atmosphere illumination control system, which adopts the standard DMX512 control protocol and a bus type network structure. A controller intensively controls all LED lamps. The system comprises an embedded light synchronous controller, an indoor atmosphere illumination controller, a general high-power LED drive, a transmission medium and the LED lamps. The system canperform scene mode control by network control mode, remote control mode, automatic control mode, manual control mode and various control modes; no less than nine scene modes are preset or can be freely set according to individual preference; digital diming can be achieved by an embedded program, and the illumination and the color tone of the light can be controlled precisely; and each lamp can beindependently controlled or can be controlled by networking. The system can ensure the evenness of the illumination effect while achieving the energy-saving illumination control and is widely applicable to local intensive illumination control of public places and families.

A method and an apparatus for realizing a multibeam smart antenna by directional antennas in a mobile communication system, are provided. The method comprises performing space division on a base station service region by N directional antennas independent with one another to divide the base station service region into N cells, each cell satisfying a perdetermined electromagnetic radialization request; composing a delamination multibeam array by the N directional antennas based on the region to be covered by the base station, the directional antenna adjusting direction of the beam in advance to realize space division multiple access, the antenna for performing transmission and receiving of signals are controlled by a main processor unit, auxiliary processors and an antenna selection unit to position and track a mobile user. The apparatus includes a delamination antenna array composed of N directional antennas independent with one another, the antenna selection unit, auxiliary processors, a main processor; wherein the N directional antennas are connected with input ends of the auxiliary processors respectively, the auxiliary processors are connected with the antenna selection unit and the main processor respectively, the main processor is connected with the antenna selection unit and the base station. The invention has a high communication capacity and immunity.

The invention discloses a gateway based on a LoRa wireless technology, and belongs to the technical field of wireless communication equipment. The gateway is in a communication connection with at least one data acquiring node of an Internet of things perceptive level, and used for transmitting relevant data acquired by each data acquiring node to relevant equipment on a network layer of Internet of things. The gateway comprises a LoRa communication module, a remote communication module, a main control module and a power module, wherein the LoRa communication module is connected with each data acquiring node; the remote communication module is connected with the LoRa communication module; the LoRa communication module is connected with the remote communication module through the main control module, and used for controlling the LoRa communication module and the remote communication module; and the power module is connected with the LoRa communication module, the remote communication module and the main control module. The gateway has the beneficial effect that a LoRa wireless communication technology is adopted, and a license-free frequency band is utilized, so that free and wireless communication is realized. The gateway also has the advantages of simple installing process, no need of advanced wiring, high mobility, low communication cost, long communication distance, low power consumption and high interference resistance.

A smart card having an extended communication distance includes a card body, at least one chip and at least one antenna attached to the chip, wherein the chip and the antenna are embedded in the card body. The smart card is characterized in that the antenna is provided with at least one metal core.

The invention discloses an underwater wireless acousto-optic communication device and method. The underwater wireless acousto-optic communication device comprises a water depth and posture measurement module, an acoustic communication module, a main control panel, a theodolite, a pulse blue-green laser, a laser emission telescope, a receiving telescope, a photoelectric detection and signal conditioning module and a high-speed data acquisition module. The underwater wireless acousto-optic communication device comprehensively utilizes the characteristics of an acoustic signal which is low in rate, but large in sidelobe and long in transmission distance and the characteristics of an optic signal which is high in communication rate, good in directivity and longer in transmission distance, realizes underwater high-speed information transmission in a longer distance, and has the characteristics of small size, light weight, high integration level, good reliability and high performance-cost ratio.

The invention relates to an external power supply type implanted medical instrument, which belongs to the technical field of implanted medical instruments and is characterized in that: the device contains an internal implanted medical instrument and an external controller, wherein, the external implanted medical instrument comprises a microcontroller, an energy storage unit, an internal power supply circuit, an internal signal emitting circuit, an internal signal receiving circuit and internal antennas, and the external controller is comprised of a microcontroller, a power source, an external power supply circuit, an external signal emitting circuit, an external signal receiving circuit and external antennas. The implanted medical instrument supplies power by the external power supply circuit of the external controller and can carry out internal electrical stimulation or physiological signal measurement; by selecting a pulse position modulation manner (PPM), a wireless communication modulation uses data signaling and a request-response manner to carry out communication and power supply control. The external power supply type implanted medical instrument has the advantages of controlled and accurate power supply, big available power, etc.

The invention discloses an explosion-proof and fire fighting reconnaissance robot. The robot comprises two parts including a fire fighting robot body and a remote control box, wherein the fire fighting robot body is composed of a box body assembly, an independent suspension shock absorption system, a fire fighting water cannon, a data acquisition multimedia assembly and an auxiliary part; the box body assembly adopts an explosion-proof design and is provided with a sensor, a camera and the fire fighting water cannon, so that the robot can replace fire fighters to enter inflammable and explosive environments and environments with toxic gas to detect and reconnoiter and can also enter accident scenes with rick smoke, fire disasters and the like to carry out fire fighting; the explosion-proof and fire fighting reconnaissance robot has the characteristics of small size, flexibility of walking, far communication distance, long working time and convenience for operation.

In an antenna apparatus, on an undersurface of a metal cover, a feeding coil module is disposed. In a casing, a printed circuit board is included. A ground conductor, a feeding pin, and a ground connection conductor are disposed on the printed circuit board. When the metal cover is mounted on the casing, the feeding pin is in contact with a connection portion of the feeding coil module and is electrically connected thereto. The ground connection conductor is in contact with the metal cover and connects the metal cover to the ground conductor. The ground connection conductor is disposed at either side of a slit outside an area in which the current density of an induced current flowing through the metal cover is in a range from a maximum value to approximately 80% of the maximum value or one side of the slit in the area.

In a wireless IC tag, metallic antennas are deposited as thin films on the front and back surfaces of a spacer, made of a heat-resistant glass epoxy material having a desired dielectric constant, to form a first antenna and a second antenna. An IC chip is mounted in the center of the first antenna. The second antenna functions as an auxiliary antenna for resonating to a desired frequency of a transmission radio wave of the first antenna to strengthen the intensity of the radio wave. Accordingly, even when the IC tag is mounted to a cable or the like, the tag can be mounted in the interior of the enclosure of the cable and thus the radio wave intensity of the first antenna can be prevented from being weakened by a metallic member in the cable.

A radio frequency (RF) communication system employs phase-modulated backscatter signals for RF communication from an RF tag to an interrogator. The interrogator transmits a continuous wave interrogation signal to the RF tag, which based on an information code stored in a memory, phase-modulates the interrogation signal to produce a backscatter response signal that is transmitted back to the interrogator. A phase modulator structure in the RF tag may include a switch coupled between an antenna and a quarter-wavelength stub; and a driver coupled between the memory and a control terminal of the switch. The driver is structured to produce a modulating signal corresponding to the information code, the modulating signal alternately opening and closing the switch to respectively decrease and increase the transmission path taken by the interrogation signal and thereby modulate the phase of the response signal. Alternatively, the phase modulator may include a diode coupled between the antenna and driver. The modulating signal from the driver modulates the capacitance of the diode, which modulates the phase of the response signal reflected by the diode and antenna.

A multimedia sensor network data transmission cooperative processing method mainly relates to a method for processing the superfluous environmental data among sensor nodes and occupying network resources reasonably. The data processing method is based on the isomerism of wireless sensor network nodes, requires that the functions of nodes can be dispersed to a maximum extent. The nodes can be divided into the following varieties: an ordinary sensing node 1, a video sensing node 2, an audio sensing node 3, a multimedia cluster head node 4, a base station node 5 and an access node 6. The invention can not only save energy, but also can establish a function dispersing cooperative processing mechanism in a wireless network, which leads the heterogeneous nodes in the whole network not to be interfered with each other, thereby being easy to maintain; besides, the homogeneous nodes can cooperate with each other, thereby being capable of occupying the network resource more reasonably and satisfying the demand of actual application more effectively.

An electric field generated by another electric field communications apparatus reaches electric field sensor ES. Electric field sensor ES outputs an electric signal in response to the changes in the electric field. The electric field that reaches electric field sensor ES enters a return path of the electric field communications apparatus that is a source of the electric field. By locating electric field sensor ES between receiver main electrode ERB and receiver return electrode ERG, electric field intensity at the location where electric field sensor ES is positioned. Therefore, sensitivity of the changes in electric field for electric field communications apparatus TRX can be improved.

A tablet PTP package contains a multiplicity of tablets by a resin PVC and a metal sheet such as an aluminum sheet. An elongate space pattern is formed in a part of the aluminum sheet on the lower surface of the package to form an island area constituting an antenna. A small radio IC inlet including an IC chip mounted on a small antenna is arranged on the reverse surface (upper surface of the package) of the portion of the aluminum sheet corresponding to the island area. The small radio IC inlet and the second antenna formed by the island area are electrostatically coupled to each other with the resin PVC as a dielectric member, and thus a RFID (radio frequency identification) tag is configured.

The invention discloses a dual-frequency radio frequency electronic tag which comprises a low frequency antenna used for receiving low frequency signals form an activation source, a low frequency circuit, a high frequency circuit, a high frequency antenna used for sending coded signals to space through high-frequency carrier, and a microcontroller storing identity (ID) numbers of the electronic tag. Programming of the microcontroller comprises the following steps: step one. reading lower frequency information signals and generating intensity identification signals according to intensity of the lower frequency information signals, step two. analyzing and extracting the low frequency information signals and producing signal source codes according to the low frequency information signals, step three. starting timing device interrupt in a time interval, in interrupt status, starting the high frequency circuit, closing the high frequency circuit and opening the low frequency circuit in sequence, step four. quitting the timing device interrupt when time duration achieves the time interval. Distance between the dual-frequency radio frequency electronic tag and a card reader can be measured, accurate positioning is achieved, identification distance is adjustable, and the problem that a plurality of card readers read the same electronic tag at the same time is solved.

The invention discloses a data transmission method, a data transmission system and nodes. The data transmission method comprises the following steps: selecting cluster heads by competition in the nodes with the same communication radii; selecting secondary cluster heads; and cooperating with the secondary cluster heads for transmitting data. The invention also provides the data transmission system which comprises first nodes and second nodes, wherein the first nodes are generated by the competition in the nodes with the same communication radii and used for selecting the second nodes which are used for cooperating with the first nodes to transmit data. The invention can save node energy in a network.

The invention discloses a fire automatic alarming system based on LORA wireless communication and a method thereof. The system comprises a master control system, fire detecting equipment, alarm equipment, a firefighting executing device and an LORA wireless communication network. The fire detecting equipment is used for monitoring a fire signal and transmits a fire signal to the master control system. After the master control system receives the fire signal, the master control system transmits an alarm signal to the alarm equipment, and simultaneously the master control system transmits a firefighting control signal to the firefighting executing device. After the alarm equipment receives the alarm signal, the alarm equipment notifies a user of a fire alarm condition in a manner of transmitting a high-strength sound-and-light alarm signal. The firefighting executing device makes field executed firefighting equipment perform fire extinguishing according to the firefighting control signal. According to the fire automatic alarm system and the method thereof, LORA wireless communication technology is utilized, thereby truly realizing an alarming and firefighting linkage function of an existing wired firefighting automatic alarm system, and preventing defects of complicated wiring, many difficulties in manual mounting and complicated maintenance in a wired fire automatic alarm system.

The invention discloses a low-altitude short-range cluster cooperative defense system and defense method. The system comprises an early-warning monitoring module, an aerial counter-measure module, a ground counter-measure module and a control center. Data acquired by the early-warning monitoring module is transmitted to the control center to form visualization air situation, when an illegal low-slow small flyer invades, the early-warning monitoring module identifies, follows and monitors the illegal flyer and indicates an azimuth and height of the illegal flyer, and the control center drives the aerial counter-measure module or the ground counter-measure module to handle the illegal flyer. The control center transmits a control instruction to the aerial counter-measure module or the ground counter-measure module and can also process information returned by an aerial unmanned counter-measure module or a ground unmanned counter-measure module in real time. The aerial unmanned counter-measure module repels or hits a target by virtue of a carried task load. The ground unmanned counter-measure module repels and hits the target or effectively suppresses the low-altitude flyer by virtue of a carried task load.

The invention relates to a temperature area method based heat metering allocation device, which is characterized by comprising indoor temperature acquisition devices, a heat meter for metering the heat consumed by each building, a building manager and a data calculation central computer, and the indoor temperature acquisition device is arranged in each house or each room; the installation positions of the indoor temperature acquisition devices of users of the same house type in the same building have the same height, and the indoor temperature acquisition devices are in signal connection with the building manager wirelessly or wiredly; and the building manager arranged in each building is used for receiving user room temperature data sent by the indoor temperature acquisition devices and heat data uploaded by the heat meter for metering the heat consumed by each building and transmitting the data to the data calculation central computer through a mobile communication network. The provided method is scientific and reasonable, and the heat charge paid by the user is calculated by the temperature data of each user and the heat data of each building as well as the area of the user.

An on-line monitoring unit for leakage current of a zinc oxide arrester comprises a zinc oxide valve block, a rectification circuit, a current mutual inductor, a sampling resistor, a signal conditioning circuit and a CC2430 chip, wherein the original edge coil of the current mutual inductor is serially connected between the rectification circuit and ground; the secondary edge coil is connected tothe sampling resistor in parallel; the voltage input end of the signal conditioning circuit is connected to two ends of the sampling resistor; the signal output end of the signal conditioning circuitis connected to the difference sampling signal input end of the CC2430 chip. The inventor has the courage to break through the traditional prejudice, and daringly connects the original edge of a precise current mutual inductor between the rectification circuit and ground directly and serially; the current mutual inductor can measure a weak leakage current less than 0.02mA; the precision reaches 0.2 level, and the electric signal is strong; the precision requirements to the following filter amplifying circuit are reduced; the phase of the output signal of the filter amplifying circuit and the phase of the original edge current are ensured to be the same; the calculation accuracy of the resistive currents is improved; the current mutual inductor is not destroyed by high voltage; and unexpected effect is obtained.

The invention discloses a LoRa (Long Range wireless network) communication technology based distribution network fault indicating system, which comprises a monitoring master station, a collection unit and a plurality of acquisition units, and is characterized in that the plurality of acquisition units are installed at acquisition points of a distribution network line at intervals and used for acquiring voltage and current data on the acquisition points, the collection unit is in wireless communication connection with the plurality of acquisition units through a LoRa and used for receiving the voltage and current data on the plurality of acquisition units; and the collection unit is in wireless communication connection with the monitoring master station through a GPRS (General Packet Radio Service) and used for sending the voltage and current data of different acquisition points to the monitoring master station and receiving command signals of the monitoring master station. The LoRa communication technology based distribution network fault indicating system has the advantages of simple structure, high fault indicating accuracy, reliable operation and the like.