291results about How to "Short transmission distance" patented technology

A method and network architecture for implementing an energy efficient network. The network includes a plurality of nodes that collect and transmit data that are ultimately routed to a base station. The network nodes form a set of clusters with a single node acting as a cluster-head. The cluster-head advertises for nodes to join its cluster, schedules the collection of data within a cluster, and then transmits the data to the base station. A cluster can intelligently combine data from individual nodes. After a period of operation, the clusters are reformed with a different set of nodes acting as cluster-heads. The network provides an increased system lifetime by balancing the energy use of individual nodes.

In a method for transferring crop material from a harvesting machine to a hauling vehicle, with which the crop material is accelerated and ejected through a conveyor chute of a transfer device to a target point on the transport vehicle, the acceleration of the crop material to be transferred is controlled as a function of at least one parameter that represents a transfer distance. A corresponding control unit for a harvesting machine, and a harvesting machine with a control unit of this type are also provided.

In an apparatus for wirelessly transmitting the temperature and an identifying characteristic of a cooking pot placed on one of the cooking zones of a stove to an electronic transmitting-receiving arrangement of the stove, the aim is to make it unnecessary to produce an operating voltage on the cooking pot. An antenna arrangement 4 of an electronic transmitting-receiving arrangement 14 is arranged under a cooking zone 2. A surface wave sensor 6 is exposed to the temperature of the cooking pot 5 and carries an identifying characteristic in the arrangement of its reflectors 11.

A wireless communication device is disclosed. The wireless communication device includes a frequency hopping communication circuit, a power spectral density circuit and a control circuit. The frequency hopping communication circuit includes a channel map. The frequency hopping communication circuit selects one of channel in a channel map to connect to another frequency hopping communication circuit according to the channel map. The power spectral density circuit for generating a power spectral density signal by measuring spectrums on all channels connected to the frequency hopping communication circuit. The control circuit receives the power spectral density and output statistical distribution data to the frequency hopping communication circuit. The frequency hopping communication circuit updates the channel map according to the statistical distribution data.

A durable synchronous opening and closing mechanism includes a support rack, a first rotation portion, a second rotation portion and a transmission member. The support rack includes a first jointing hole and a second jointing hole and at least one coupling portion. The first rotation portion includes a first rotation shaft, a plurality of integrally formed first transmission bumps extended radially outward and a first limiting portion. The second rotation portion includes a second rotation shaft, a plurality of integrally formed second transmission bumps extended radially outward and a second limiting/portion. The transmission member has an axle and a plurality of bridging bumps radially formed to engage with the first transmission bumps and second transmission bumps. The first and second limiting portions restrict rotation of the bridging bumps.

An activity monitoring system and method are disclosed to reduce the size of an activity sensor device to reduce its power consumption and smoothly transmit activity and occupancy information from the activity sensor device and an occupancy sensor device to an activity monitoring server to monitor an individual's activity and occupancy information. The activity monitoring system includes: an activity sensor device configured to detect a physical activity of a user, classify the detected physical activity, and transmit activity classification information as a result along with user identification information; one or more occupancy sensor devices configured to receive the activity classification information and the individual's identification information from the activity sensor device, and transmit the received information along with occupancy information; and an activity monitoring server configured to manage the activity classification information, the occupancy information, and the individual's identification information received from the occupancy sensor devices.

A probe card is provided. The probe card detaches or separates a probe assembly and a test signal generator which generates test signals from the tester and the printed circuit board, so as to form a probe system module. The probe system module is secured into a probe card module by one or more securing unit. The probe card module includes the printed circuit board. Control signals from the tester are wirelessly transmitted to the probe system module and drive the probe system module to generate the corresponding test signals. Therefore, the loss or distortion of the test signals due to having longer transmitting distances will be reduced and thus the test quality can be improved.

The invention provides a porous composite electrode and a preparation method therefor. The porous composite electrode comprises a metal porous body, and noble metal, noble metal alloy, metal hydroxide or metal oxide loaded on the surface of the metal porous body, wherein the metal porous body accounts for 0.05-20% of the whole electrode based on volume percentage; the metal porous body adopts a three-dimensional network structure, and is a continuous porous metal framework; the metal framework has ultra-thin metal walls; and the metal framework is 5-500nm in wall thickness, 80-99.95% in framework porosity, and 50nm-100[mu]m in pore diameter. The porous composite electrode provided by the invention is mainly applied to the fields of a supercapacitor, a lithium ion battery and an air (or oxygen) battery, as well as can be applied in the filtering and other electro-catalysis fields.

Disclosed herein is a system for and method of determining the location of an RFID reader, the system comprising: a plurality of transmitters having a known reference point. Each transmitter includes a circuit for transmitting a sequence of unique RFID pseudo tag signals. Each unique RFID pseudo signal in the sequence has a unique range of transmission. Each unique RFID pseudo tag in the sequence has a tag identification indicating the range of transmission of the pseudo tag signal and a transmitter identification value indicating the transmitter from which the pseudo tag signal was transmitted. An RFID reader receives the unique RFID pseudo tag signals and distinguishes between each received unique RFID pseudo tag signal. A location calculator calculates the location of the RFID reader based on the range of transmission indicated in the tag identification and the location obtainable from the transmitter identification value of the unique RFID pseudo tags received by the RFID reader.

The invention discloses an automatic processing production line for metal sheets, relates to the field of automobile sheet processing, in particular to the automatic processing production line for metal sheets. The automatic processing production line is simple in structure and is reasonable in layout, saves working time and improves working efficiency. A stamping processing unit is arranged on a foundation by virtue of a damping mechanism; the stamping processing unit is used for processing blank sheets into semi-finished products; a stamping loading and unloading mechanical hand is used for gripping the blank sheets of a blank warehouse and gripping the semi-finished products to a semi-finished product warehouse; and a gap is arranged between a counterweight platform and a vibration isolating slot, and a spring is arranged in the gap. According to the automatic processing production line for metal sheets, the gap is arranged between the counterweight platform and the vibration isolating slot, and sand is arranged in the gap. The automatic processing production line realizes processing such as automatic forming, trimming, opening cutting and the like, is small in floor space, is small in material transmission distance, is precise and efficient, is high in working efficiency, is capable of realizing cutting processing without stop, is high in efficiency, and is beneficial for improving the working efficiency of the integral production line.

The invention discloses a full-automatic board edge cutting machine which belongs to the field of board machinery. The full-automatic board edge cutting machine overcomes the defects of low efficiency, imperfect functions and low stability of a board edge cutting machine in the prior art. The technical scheme adopted by the invention has the key points that the full-automatic board edge cutting machine comprises a board feeding machine, a board falling machine, a longitudinal edge cutting machine, a transverse edge cutting machine, a stacking lifting machine and a control center; the board feeding machine comprises a feeding lifting machine and a board feeding device; one side of a crane I is fixedly provided with an ejector plate cylinder; the board feeding device comprises a beam fixed on the crane I; both ends of the beam are respectively provided with driving wheels; the two driving wheels are in transmission by a driving chain I; the driving chain I is fixedly provided with a slip hook; a positioning platform is arranged between the board feeding machine and the board falling machine; both sides of the positioning platform are respectively provided with a fixed positioning plate and an elastic positioning device; and the lower part of the positioning platform is fixedly provided with a push plate cylinder. The full-automatic board edge cutting machine is mainly used for cutting burrs of a board.

The invention provides a noble metal supported nano frame catalyst and a preparation method and application thereof. The catalyst comprises noble metals and transition metal hydroxides, and is of a hollow nano frame structure. According to the noble metal supported nano frame catalyst, the catalyst is of a hollow nano frame structure, so that the activation specific surface area is large, the wallthickness is small, and the substance transmission distance is short; the catalyst supports a nickel cobalt hydroxide with the noble metals, so that the electronic structure between the nickel cobalthydroxide and the noble metals is optimized, the stability of the catalyst is high; the overpotential of catalyzing a hydrogen evolution reaction can be effectively reduced, wherein the overpotentialis only 60 mV when the current density is 10 mA cm-2; and the catalyst is simple in preparation method, short in production cycle, and wide in application prospect.

The invention relates to the technical field of lithium-ion-battery manufacture, in particular to a method for preparation of a sulfur-nitrogen codoped carbon coated nano flower-like lithium titanatecomposite negative electrode material. According to the method, polyvinylpyrrolidone, tetrabutyl titanate and lithium hydroxide monohydrate are dispersed in an organic solvent, after hydrolysis and calcination, thiourea and polyacrylamide are added, then high-temperature plasma treatment is conducted, and the sulfur-nitrogen codoped carbon coated nano flower-like lithium titanate composite negative electrode material is obtained. The seep of preparation of the electrode material and the specific capacity under the high rate condition are improved.

The invention discloses a self-adaptive anti-interference wireless transmission method for a band type network. The method includes the steps that when wireless sensor nodes have access to the network, short addresses are distributed by an aggregation node; the aggregation node broadcasts or request information to the wireless sensor nodes; the wireless sensor nodes judge whether they are within a routing radius range of a broadcasting issuing node; each wireless sensor node calculates a response slot time of its own and transmits a response in the response slot time; in the routing radius range, the nodes monitor a new routing node n to conduct broadcasting; the new routing node transmits data packet information to determine a latter route in the same broadcasting mode; the wireless sensor nodes judge whether they are destination addresses of a data packet link layer. The band type network can dynamically adjust the farthest transmission distance of the route according to the communication situation so as to adapt to external environmental inference; when the environmental interference is small, the information can be transmitted efficiently and quickly; when the environmental interference is large, the transmission distance is shortened.

The invention provides an inspection data transmission method, an inspection robot and an inspection system, applied to technical field of power transmission and distribution. the method comprises thefollowing steps: acquiring inspection data by an inspection robot, then encrypting the inspection data, to obtain inspection data ciphertext, then, transmitting the signals to a local robot server through a public broadband network, decrypting the inspection data ciphertext, to obtain inspection data, processing the inspection data to obtain to-be-transmitted data suitable for electric power wireless private network transmission, encrypting the to-be-transmitted data, transmitting the encrypted to-be-transmitted data to an inspection robot through a public broadband network, and finally transmitting the to-be-transmitted data to a remote server by the inspection robot through the electric power wireless private network. The data transmitted through the public broadband network is encrypted, so that the security of data transmission can be ensured, the data capacity of the processed data to be transmitted is suitable for being transmitted by using an electric power wireless private network, and the transmission efficiency and the security of data transmission can be improved.

The invention relates to a transmitting device for transmission through space, using electromagnetic waves of the infrared and/or visible and/or ultraviolet bands produced by one or several diodes producing electroluminescent light.

The device is connected by its input terminals (1) to an a.c. energy distribution system. A mains filter (2) reduces the conducted electromagnetic disturbances produced by the power circuits comprising a rectifier (3), a power-factor-correction circuit (4), an auxiliary power supply (5) and a DC-to-DC converter (8). The output of the DC-to-DC converter (8) is connected to several high power light-emitting diodes connected in series (9). A receiving set for transmission via power distribution lines (6) delivers demodulated signals applied to the control circuitry (7) which provides the current command of the DC-to-DC converter (8) and the modulated current applied to the light-emitting diodes (9) through the modulation transformer (10), as a function of the demodulated signals and of the temperature which is measured by a temperature sensor (11). The produced light is modulated as a function of the demodulated signals.

The invention discloses an IEEE (Institute of Electrical and Electronic Engineers) 802.15.4g standard-based wireless monitoring communication protocol, and belongs to the technical field of embedded wireless monitoring. IEEE802.15.4g is a standard of a physical layer named SUN, which is established by Institute of Electrical and Electronic Engineers (IEEE) in recent two years, the physical layer is supplemented on the basis of an IEEE802.15.4 standard, and the IEEE802.15.4g standard is particularly suitable for battery powered infrastructure sensor networks which have ultralow power consumption, remote transmission and excellent anti-noise performance. Although IEEE802 is still standardized at present, a draft scale has been determined basically, so the set of standard is necessarily tracked and studied timely, and based on the underlying standard, a set of ultralow power consumption wireless upper-layer communication protocol applied to the field of smart grid monitoring is designed and developed. The protocol aims at a star network topological structure, working method steps for a network coordinator node and a sensor node are respectively designed, and the protocol has the characteristics of low velocity, ultralow power consumption, low complexity and the like.