47results about How to "Small transmission power" patented technology

A system for long-term remote medical monitoring is especially suitable for the medical supervision of astronauts onboard a space station. The system includes at least one autonomous sensor unit (SU) with a sensor (1) and transmit/receive electrodes (2) connected to a microchip (3) and mounted on a carrier (4) in the form of an adhesive bandage that can easily be applied to the skin of the subject astronaut (11). The system further includes a body transceiver (10) that is worn on the body of the subject and acts as a centralized transmitting and receiving unit, and a portable data logger (12). Medical data such as the pulse rate and the like, as well as environmental data such as the ambient surrounding air temperature, are sensed by respective allocated sensor units (SU) and transmitted from the sensor units as electrical signals via the skin and other body tissues of the subject (11) to the body transceiver (10). From the body transceiver (10), the data signals are further transmitted, for example by a radio or infrared transmission, to the data logger (12), where the data can be recorded, displayed, processed, or further transmitted via a satellite (14) to a base station (13) or a ground-based facility such as a hospital (15). Polling signals are also transmitted from the body transceiver (10) to the sensor units (SU) in a wireless manner through the skin and other body tissues of the subject.

A method of allocating a channel in a wireless local area network (WLAN) system is provided. The method includes generating a MAC protocol data unit (MPDU) to be transmitted to a target station (STA), generating a PLCP protocol data unit (PPDU) by attaching a physical layer convergence procedure (PLCP) header to the MPDU, and transmitting the PPDU to the STA, wherein the PLCP header includes channel allocation information for transmission of the PPDU.

A system for activating an object actuating system coupled to a movable object such as a gate or garage door includes a user command transmitter that is manipulable by a person to generate a signal representing an identification and a command. A repeater receives the signals from the command transmitter and in turn, in the presence of a valid ID, sends a command signal to the object actuating system, which in turn moves the object only if the ID from the repeater (which can be different from the ID from the command transmitter) is valid.

The invention discloses a bearing device for a solar cell assembly. The bearing device comprises a plurality of supports, a plurality of rotating brackets and a driving mechanism, wherein the plurality of supports are arranged at intervals; the plurality of rotating brackets for supporting a solar cell panel are rotationally supported on the plurality of supports respectively and comprise drivingrotating brackets and driven rotating brackets, and the two adjacent rotating brackets are connected through a flexible linkage mechanism so that the plurality of rotating brackets rotate synchronously; and the driving mechanism is connected with the driving rotating brackets to drive the driving rotating brackets to rotate. According to the embodiment, the flexible linkage mechanisms are linked with the plurality of rotating brackets to rotate synchronously, so that the bearing device for the solar cell assembly has low transmission power, light weight, low cost and low installation precision requirement. The invention also discloses the solar cell assembly adopting the bearing device.

A radio link is set up from a transmitting station to a receiving station for the transmission of data after a time interval has elapsed. The time interval is specific to the transmitting station and has a duration which depends on at least one deterministic quantity.

A slot antenna includes an insulation substrate, a metal layer provided on the insulation substrate, a slot formed in the metal layer, and a feeding part connected to the metal layer. The slot is symmetric with respect to a centerline. When an x-y coordinate system is defined on the metal layer so that the y-axis is the symmetric line, the origin is the center of the slot antenna, and the x-axis through the origin is perpendicular to the y-axis, the width of the slot in the direction of the y-axis increasing in proportion to the absolute value of the x-axis.

In an embodiment the method includes, at a transmit side, grouping carriers into carrier groups, and selecting a group constellation diagram for modulation of the carriers of a given carrier group. The selected group constellation diagram is built as a hierarchical sum of I super-imposed constellations vectors having predefined decreasing powers with the P strongest and the Q weakest constellation vectors being omitted. The carriers of the carrier group are modulated by means of the selected group constellation diagram, and P and/or Q parameters per carrier group and per multi-carrier data symbol are adjusted.

The invention relates to a method for operating a fuel pump in order to guide fuel from the fuel container of an internal combustion engine, wherein the electric energy, which is in the form of pulses, is periodically guided to the fuel pump and the duration of the pulses is controlled according to the fuel required by the internal combustion engine. The frequency of the pulses is controlled in such a manner that, in the event of low pump capacity of the fuel pump, the frequency is controlled to a higher level than in the even of a high pump capacity.

A method for synchronizing a RFID receiver, comprising receiving an input signal from a RFID tag, said input signal comprising a preamble section, creating a first reference waveform, comprising at least a fraction of said preamble section, calculating a first correlation value by correlating said input signal and said first reference waveform, creating a second reference signal so that there is virtually zero correlation between said first reference waveform and said second reference waveform, and using said first correlation value and said second correlation value for adjusting synchronization timebase, wherein the sign and the size of said second correlation value indicates the size and the sign of phase inaccuracy of the synchronization timebase.

A rotary-drum type tube bundle drier comprises a rotary drum (19) and a plurality of heat exchange tubes arranged in a hollow cavity of the rotary drum (19) in an axial arrangement manner. The drier is characterized in that the heat exchange tubes are arranged in the inner cavity of the rotary drum (19) through at least two supporting tube sheets (18) which are arranged transversely and fixedly connected with the inner wall of the rotary drum (19); the heat exchange tubes are composed of steam feeding heat exchange tubes (20) and steam exhausting heat exchange tubes (21) arranged at intervals, and one end of the steam feeding heat exchange tube (20) communicates with one end of the steam exhausting heat exchange tube (21) through connecting tubes to form a loop, wherein the steam feeding heat exchange tube (20) and the steam exhausting heat exchange tube (21) are adjacent, and the other ends of the two heat exchange tubes are respectively connected with a steam feeding collecting ring (16) and a steam exhausting collecting ring (17); the steam feeding collecting ring (16) and the steam exhausting collecting ring (17) respectively communicate with a steam feeding cavity (14) and a steam exhausting cavity (13) in a steam collector (15). The rotary-drum tube bundle drier not only reduces production cost and processing difficulty, but also effectively solves the problems of uneven stress when the heat exchange tubes rotate and leakage between the heat exchange tubes and the tube sheets.

The invention discloses a drying cylinder. The drying cylinder comprises a cylinder body and flanges located at the two axial sides of the cylinder body and used for installing spindle noses, the cylinder body is a steel cylinder body, an interlayer is arranged at the circumferential inner side of the cylinder body and used for storing conduction oil with the heat-resistance temperature equal to or higher than 300 DEG C, and heaters used for heating the conduction oil are placed on the interlayer. As the steel cylinder body is adopted, the wall thickness and dead weight of the steel cylinder body are reduced compared with a cast iron cylinder body in the prior art, the transmission power of the drying cylinder is reduced, the heat transfer efficiency is improved, and energy is saved; the surface of the steel cylinder body is sprayed with chromium-based alloy and nitrided to prolong the service life. In addition, as the interlayer is additionally arranged on the drying cylinder and filled with the conduction oil with the heat-resistance temperature equal to or higher than 300 DEG C, and the heaters are used for heating the conduction oil, the temperature of the drying cylinder can be kept constant within the range of 240 DEG C-260 DEG C, wet paper is dried more easily, and the production efficiency is effectively improved. The invention further discloses a paper machine comprising the drying cylinder.

The invention discloses a pouring device. The pouring device comprises a base, a bracket, a plurality of pouring dies, a rotating bearing, a pinion and a driving device, wherein the bracket is rotatably arranged on the base; a pouring cavity of which the upper part is provided with an opening is formed on each of a plurality of pouring dies; a plurality of pouring dies are uniformly arranged on the peripheral edge of the bracket; the rotating bearing comprises an inner gear ring and an outer ring; the inner gear ring is connected with the bracket to drive the bracket to rotate; the outer ring is connected with the base; the pinion is meshed with the inner gear ring; and the driving device is arranged on the base and connected with the pinion to drive the pinion to rotate. According to the pouring device in the embodiment of the invention, the operation stability and reliability of the pouring device are improved; and the working efficiency of the pouring device is improved, transmission power is low, and the pouring device is energy-saving and environment-friendly, has a simple structure and is convenient to produce and install.

The invention discloses a welded steel pipe molding using diameter-inequality roller that is formed by upper roller and down roller which have the same shape and structure. The roller includes roller identity, roller hole and working concave. The invention could decrease the sliding friction of roller working surface and tube blank to avoid the scratches and improve the quality of the product. It also decreases running resistance of tube blank, and increases driving efficiency, saves electric power and prolongs useful life of roller.

The invention discloses a silica gel calendering compounding machine, comprising a rack and five rollers, wherein, the rollers are connected with the rack through a bearing pedestal, and each roller is respectively connected with an independent variable frequency motor. According to the invention, a plurality of variable frequency motors are used to independently drive each roller to enable the speed ratio among rollers to be arbitrary ratio, cooperate the reasonable collocation of distance between rollers and generate certain buildup between rollers, so that the quality defect of bubbles carried in the products can be solved, and the advantages of low electricity consumption, small volume, high production efficiency, labor saving and the like of the silica gel calendering compounding machine are achieved.

A device for continuous carbon felt impregnation comprises a frame, a carrier shaft, a feed roll shaft, an impregnation tank and a discharge roll shaft, wherein the carrier shaft, the feed roll shaft, the impregnation tank and the discharge roll shaft are sequentially arranged on the frame. A drive motor is arranged between the feed roll shaft and the discharge roll shaft, the drive motor is respectively connected with the feed roll shaft and the discharge roll shaft through a transmission device, impregnation roll shaft brackets are disposed inside two ends of the impregnation tank respectively, an impregnation roll shaft is arranged on the impregnation roll shaft brackets, and a slanting guide board is disposed below the discharge roll shaft and connected with the impregnation tank. Thedevice can be used for continuous, mechanical and automatic impregnation for carbon felts, labor intensity can be reduced greatly, impregnation efficiency can be improved, and product quality stability can be improved.

The invention discloses a stepped twin-screw extrusion device and a bulking machine which comprises twin screws arranged in parallel, wherein screw configuration of the twin screws adopts a stepped variable pitch double-threaded screw structure; and the twin screws comprise a 2-time screw diameter coarse pitch double-threaded screw structure, a three-forward kneading block, a 1.5-time twin-screw structure, a primary three-forward three-backward kneading block, a one-time twin-screw structure, a secondary three-forward three-backward kneading block, a primary one-time slotted twin-screw structure, a double-threaded inverted screw structure, a secondary one-time slotted twin-screw structure and a discharging conical screw structure which are connected in sequence from a feeding hole in the front end of the screw to a discharging hole. According to the stepped twin-screw extrusion device and the bulking machine, retention time of materials in a chamber of the bulking machine is long, thekneading effect is excellent, the pressure in the chamber is uniform, the product stability is high, discharging uniformity is realized, the product is uniform in material form and excellent in kneading effect, the material curing degree is excellent, and the machine is suitable for producing high-oil low-starch (with starch content of 10% or less) high-grade floating and sinking feed.