203results about How to "Expand the effective range" patented technology

A modular wireless Internet access communications system designed to extend broadband 802.3 linear-bus topology up to fifteen miles beyond the physical limits of DSL or cable technologies through the integration of specialized wireless hardware devices, firmware, and protocols.

A monitored area is provided multiple RFID tags placed at defined coordinates / locations throughout the extended area. These RFID tags respond to receipt of a RF signal by transmitting / broadcasting their unique identifier (ID) within the specific area in which the tag is located. A device, whose location within the monitored area is desired, is equipped with an RFID interrogating device, such as an RF transceiver, which periodically broadcasts RF interrogation signals. The multiple RFID tags are positioned at specific areas within the environment to allow the RF interrogating device to (1) receive the RFID signal and (2) utilized the received data to independently determine the device's location.

An image pickup optical lens assembly, sequentially arranged from an object side to an image side along an optical axis, comprising: the first lens element with positive refractive power having a convex object-side surface, the second lens element with negative refractive power, the third lens element with refractive power, the fourth lens element with positive or negative refractive power having a concave object-side surface and a convex image-side surface with both being aspheric, and the fifth lens element with positive or negative refractive power having a convex object-side surface and a concave image-side surface with both being aspheric. Additionally, the image pickup optical lens assembly satisfies conditions related to the reduction of the total length and the sensitivity of the image pickup optical lens assembly for compact cameras and mobile phones with camera functionalities.

A monitored area is provided multiple RFID tags placed at defined coordinates / locations throughout the extended area. These RFID tags respond to receipt of a RF signal by transmitting / broadcasting their unique identifier (ID) within the specific area in which the tag is located. A device, whose location within the monitored area is desired, is equipped with an RFID interrogating device, such as an RF transceiver, which periodically broadcasts RF interrogation signals. The multiple RFID tags are positioned at specific areas within the environment to allow the RF interrogating device to (1) receive the RFID signal and (2) utilized the received data to independently determine the device's location.

A method and apparatus for transmitting and receiving data, wherein a narrow band data signal is transmitted at an unknown frequency within a known range of frequencies and received, and, at the receiver, the range of frequencies is divided into plural frequency bands each of width less than the uncertainty in the transmission frequency of the data signal, with the presence of said data signal detected in at least one of said frequency bands and thereupon demodulated.

A system and method for disinfecting hard surfaces in an area such as a hospital room including a light source emitting UV light and a reflector mounted behind the light source for concentrating and directing the light toward a target. The light source and reflector rotate to direct the concentrated beam around a room, thereby making more efficient use of the energy being emitted.

An apparatus for assisting in finding an article such as a golf ball (2) includes a housing (3) containing a laser diode (4) for radiating an excitation beam (5) in the UV or IR bands. The apparatus has a receiving lens (9) for receiving a return beam (8) sent back from the golf ball (2) by the fluorescent coating on the ball. The return beam (8) falls on a photodiode receiver (10) after passing through two filters (11, 12) which filter out incident sunlight. Processing means (15) processes the signal received by the receiver and drives an indicator (18) in the form of a beeper or flashing light which indicates that the golf ball (2) has been sensed by the apparatus.

A system is provided to allow a computer to control one or more devices using the remote control codes that are normally used by remote control units associated with these devices. The system has one or more remote control units for transmitting commands, one or more devices to be controlled, and a computer. The computer is coupled to an input device, and has a memory, a receiver which receives codes from the remote control units, and a knowledge base for storing the codes received from the remote control units and command identifiers provided from the input device. The knowledge base associates each command identifier with a particular code. The computer also includes a transmitter which transmits codes to the device to be controlled based on selected command identifiers. During configuration, the computer executes a program that prompts the user to enter a command identifier and code to be associated with that command identifier. The received code and its associated command identifier are stored in the knowledge base. During operation, a user enters a command identifier, and the program searches the knowledge base for the command identifier so as to locate the code corresponding to the command identifier. The program then transmits the code to the device to be controlled.

In a security system, a method and apparatus for two-way frequency hopping communications between the control panel and each peripheral device which maintains channel synchronization through the assignment of fixed beacon frequencies for the transmission of synchronizing data. The use of frequency hopping provides high immunity to jamming and interference, reduced occurrence of multi-path phenomena, and allows for transmissions at a much higher output power than conventional fixed-frequency communications, to thus increase the effective range of the peripheral devices while providing effective and reliable two-way communications between the control panel and the peripheral devices. The invention also provides a large number of channels, which allows for actuators such as sirens, strobes and line seizing devices to be wireless in addition to sensors. The invention provides a high immunity to signal jamming, interference from other wireless systems and miss-detection due to multi-path phenomena; reduces opportunities for collision between peripheral transmissions; and eliminates the redundant emission of peripheral transmissions to reduce RF traffic in the vicinity of the system and extend the life of batteries used in the peripheral devices.

Shunt fibers having a photonic bandgap cladding region including one or more hollow guiding regions of which one guiding region is configured as the core and one or more other guiding regions are configured as shunts, respectively, provide nearly single mode transmission in the core. The effective mode index of unwanted core modes and modes in one or more shunts are matched closely enough such that higher order modes will selectively couple to the shunt modes by resonant phase matching in the presence of fiber variations. The shunts are designed to have relatively higher losses thereby effectively dissipating power in the higher order modes at a faster rate.

The invention relates to a kind of method to collect images and its application. The method to collect the images includes: setting the camera and optical-reflect device in the pre-established place and with the pre-established angle; the camera collects the images of the shot objects in the optical-reflect device. The system to collect the images includes: the camera and the optical-reflect device. The method to recognize the faces of persons includes collecting the images and recognizing the persons' faces according the collected images, of which the progress to collect the images includes setting the camera and optical-reflect device in the pre-established place and with the pre-established angle; the camera collects the images that is reflected into the optical-reflect device by the check persons. The system to recognize the persons' faces includes camera, the optical-reflect device and the person-face recognizer which includes image-turning module. The invention enlarges the effective covering range of the image the camera can get with the optical-reflect device, and get the aim to improve the accuracy to recognize the faces of persons.

A system comprising a laser for transmitting a beam of light towards a target area; a controller for controlling the output of the laser; a receiver for collecting reflected pulses of light reflected from the target area, the receiver comprising a plurality of receive elements, each of the receive elements having a different field of view; a combiner for combining the outputs of the receive elements into one composite signal of the target area; an interface circuitry for converting the composite signal into an image; display unit displaying output from interface circuitry.

A system and method for disinfecting hard surfaces in an area such as a hospital room including a light source emitting UV light and a reflector mounted behind the light source for concentrating and directing the light toward a target. The light source and reflector rotate to direct the concentrated beam around a room, thereby making more efficient use of the energy being emitted.

A tag includes an integrated circuit thereon, including memory, antenna means for RF transmission of data acquired by the integrated circuit, a sensor sensing environmental conditions to which the sensor is subjected, the sensor providing signals based on the environmental conditions to the integrated circuit, a thermistor device of increasing the accuracy of the tag by confining on-board calculation data to a resistance domain and leaving conversion of the data to a temperature domain for an external device once the data is retrieved from the tag's memory.

The invention discloses a curved surface projection method of a multi-camera panorama system. The method comprises the following steps: obtaining a distortion image of a wide-angled camera; carrying out distortion adjusting to the distortion image and generating a distortionless image; and projecting the distortionless image to a three-dimensional surface and generating a panoramic image. According to the curved surface projection method of the multi-camera panorama system, the distortionless image is firstly obtained through distortion adjusting, and then a three-dimensional surface model is built, and moreover, coordinate transformation is unified according to the coordinate value Zc of Z-axis of the three-dimensional surface model. Finally, the distortionless image is projected to the three-dimensional curved surface model, and panoramic imaging on the surface is achieved. Compared with the prior panoramic imaging technique, the curved surface projection method of the multi-camera panorama system has the advantages that scene has a third dimension sense and is relatively real when the scene is looked; effective range displayed is greatly enlarged; and shape and outline of an three-dimensional object can be figured out when the object is projected to the curved surface, and problem of vagueness when the three-dimensional object is projected to the flat surface is effectively solved.

An integrated circuit 2 operates using a digital signal having a duty cycle. Duty cycle correction circuitry 26, 28, 30 operate under control of digital correction values which adjust the duty cycle of the digital signal to a target duty cycle. Periodically, detection of the duty cycle output from the duty cycle correction circuitry 26, 28, 30 is performed to determine whether or not this has drifted outside of a threshold range of duty cycles and if necessary the digital correction value is changed to bring the duty cycle back within the threshold range. The duty cycle correction circuitry 26, 28, 30 employs common mode logic stages 44, 46 and an auxiliary current path 48 which is controlled in its impedance by the digital correction value. The auxiliary current path 48 applies an offset voltage within the common mode logic stage 44 which adjusts the duty cycle of the digital signal represented by the differential signals propagating through the common mode logic stage 44.

A temperature-actuated mixing valve for controlling outlet temperature in a fluid flow system including a valve housing having first and second fluid supply inlets for introducing first and second respective supply fluids and a fluid outlet for dispensing a fluid at a predetermined outflow temperature. The mixing valve includes a shuttle assembly positioned in the housing. The shuttle assembly includes a valve member mounted for movement within the housing responsive to the temperature of the supply fluids to vary the mixture ratio of the first and second supply fluids as required to dispense fluid at the predetermined outflow temperature. A shuttle member is positioned within the valve member and is moveable as a unit therewith within a predetermined range of motion responsive to supply fluid temperature variation. A thermal actuator is provided of the type which converts thermal energy into mechanical movement by movement of a piston. A first end of the thermal element engages the movable shuttle member and an opposing second end engages a stationary portion of the housing whereby movement of the piston of the thermal actuator produces corresponding movement of the valve member. An overtravel spring is captured in a tensioned condition between the valve member and the shuttle member for maintaining the shuttle member and the valve member in a stationary condition relative to each other within the predetermined range of motion of the valve member and for permitting movement of the shuttle member relative to the valve member sufficient to accommodate movement of the piston of the thermal actuator when the valve member has reached its limit of travel without accommodating the full extent of movement of the piston of the thermal actuator.

The invention belongs to the technical field of safety monitoring, in particular to a fiber photoelastic effect based larger-area sound monitoring system. The system comprises a remote demodulation terminal, full fiber sensing terminals in an area to be monitored and a transmission optical cable for connecting the demodulation terminal with the full fiber sensing terminals, wherein a large quantity of full fiber sensing terminals can be multiplexed on the transmission optical cable. In the invention, sensing fibers in the full fiber sensing terminals are used for extracting various sound signals in surrounding environment, and the transmission optical cable is utilized to acquire the information and returning the information to the demodulation terminal; and through corresponding analysis and processing, the information is really restored to realize the real-time monitoring of various sound signals in a large-range area to be monitored. The system mainly comprises passive fiber devices without comprising any electronic components, has no radiant electromagnetic waves, cannot be influenced by electromagnetic interference and is suitable for the fields of military affairs, public security, security, safety production, disaster prevention and control, and the like.

A photographing optical lens assembly comprises, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with refractive power has a concave object-side surface in a paraxial region. The second lens element has refractive power. The third lens element has refractive power. The fourth lens element with negative refractive power has an object-side and an image-side surfaces both being aspheric. The fifth lens element with refractive power has an aspheric object-side surface and an aspheric image-side surface being concave in a paraxial region with at least one inflection point. The photographing optical lens assembly has a total of five lens elements with refractive power.

A system and method for monitoring a premise in case of an emergency and enabling 2-way voice communications with an individual at every possible location within the monitored premises. The system utilizes a radio frequency 2-way wireless communication link from a centrally located Base Alarm Control Unit on the premise to plurality of Remote Alarm Control Units situated throughout the premise. Remote Alarm Control Units relay the information received from the wireless remote transmitters to the Base Alarm Control Unit thereby increasing the effective useful range of the wireless communication link. The same also establishes a 2-way voice connection between the Central Station operator and the individual who may be located at any possible location within the premise, thereby providing a much more effective handling of the emergency or alarm situation.

The invention relates to improved ammunition for pistols and carbines to provide a cartridge that may be used within the restricted dimensions of these weapons while increasing the effective range normally associated with such ammunition. Additionally, the velocity increase creates sufficient projectile cross-sectional energy to allow the perforation of certain body armor types. The invention provides a cartridge which by means of diameter reduction of the case in the area of the front and the application of a sabot or bore carrier assembly allows a small diameter projectile, typically 5.56 millimeters, to be fired from a short compact ammunition that may be employed in a pistol size weapon. A weapon chamber is dimensioned to accept the cartridge as described at a tolerance between approximately 3 and 9 one thousandths of an inch.

A method for retaining network address of a wireless client device as the device roams between different access points operably connected to a single gateway is described. An embodiment comprises maintaining a table in the gateway memory containing the unique identifier of the wireless client device sent with each data packet. In addition to, the unique identifier, an entry in the table in the gateway memory includes the communication pathway established between the gateway and the wireless client device. When forwarding a data packet from the WAN to the wireless client device, the gateway uses the table in the gateway memory to determine the correct destination path for the data packet instead of relying on the destination address attached to the data packet.

The invention provides a scum treatment device of an aerated grit chamber, which is obvious in scum scraping effect, runs stably, is high in efficiency, and has less faults. The scum treatment device of the aerated grit chamber comprises an aerated grit chamber, wherein the aerated grit chamber is provided with a grit absorption bridge; the grit absorption bridge is suspended above the aerated grit chamber and moves linearly back and forth along the trend of the aerated grit chamber; the linear moving path of the grit absorption bridge is provided with an initial end close to a water intake part of the aerated grit chamber and a tail end close a water drainage part of the aerated grit chamber; the grit absorption bridge is provided with a grit absorption pump acting on the bottom of a chamber of an aerated grit zone as well as a scum scraping device acting on a chamber surface of an oil removing and scum scraping zone; the scum scraping device comprises a scum scraping plate and a pre-scraping plate which can be installed on the grit absorption bridge at the same time in a lifting mode, are respectively distributed on the chamber surfaces of the oil removing and scum scraping zone along the motion direction of the grit absorption bridge back and forth, and are respectively positioned at the outer side of a space below the grit absorption bridge; when the grit absorption bridge is positioned on the initial end of the linear moving path, the pre-scraping plate is fit to the chamber surface of the water intake part of the grit absorption bridge; when the grit absorption bridge is positioned on the tail end of the linear moving path, the scum scraping plate is fit to the chamber surface of the water drainage part of the aerated grit chamber.

A manifold including a stepped louvre to control airflow along a fan blade. A fan blade for use in a high-volume, low-speed fan, wherein the fan blade includes a body portion, a leading edge portion and a trailing portion. The leading edge portion of the fan blade includes a series of steps extending along the length of the leading edge. The fan distributes airflow from the manifold.

A transmitter for a dog training system, the transmitter having a command input device for inputting a training command input into the transmitter, and a transmitter controller connected to the command input device. The transmitter controller translates the training command input into identification data and command data. The transmitter controller also generates at least one forward error correction codeword from the identification data and the command data.

The invention relates to the technical field of masterbatches, in particular to a transparent flame-retardant masterbatch, a transparent flame-retardant PET film and a preparation method. The transparent flame-retardant masterbatch comprises optical polyester resin, flame-retardant microspheres, a synergistic flame retardant and a dispersant; the flame-retardant microspheres are of a core-shell structure, wherein the core is nano-red phosphorus, and the shell is microcrystalline cellulose; the synergistic flame retardant is a metal hydroxide. By utilizing the microcrystalline cellulose servingas a carbon source to coat red phosphorus serving as an acid source, the compatibility of red phosphorus and an organic polymer can be well improved, and thus the flame-retardant microspheres can besufficiently dispersed in the optical polyester resin; the microcrystalline cellulose has a porous property and can easily form an expandable carbon layer as a carbon source, and the effective range of isolating flame retardance is widened; in addition, by adopting the highly transparent optical polyester resin, the transparency of the masterbatch can be effectively improved.

The invention discloses a wet and dry dual-use permanent magnetic separator. The wet and dry dual-use permanent magnetic separator comprises a rack, a magnetic separating barrel, at least two magneticsystems, a drive slewing device, a driven slewing supporting device, a drive device, a feeding hole, a feeding device, a material distributing box, at least two groups of material distributing slots,at least two non-magnetic product receiving hoppers, at least two magnetic receiving hoppers, at least two magnetic separating regions, a slag isolating sieve, a vibrator, at least one layer of magnetism gathering media, at least two ore discharging bars and at least two rinsing water tubes. According to the wet and dry dual-use permanent magnetic separator disclosed by the invention, the effective range of magnetism is sufficiently utilized, so that processing capacity of magnetic-separating pre-selecting equipment is increased; range of processing granularity is expanded; a wet and dry dual-use separating environment is adapted; the structure is compact; the cost is reduced; energy conservation and environment protection are achieved; and product quality of magnetic products is improved.

The invention relates to a guide device, and in particular relates to a guide device for preventing a wire rope of a winding engine from separating from a groove. The guide device comprises a bracket and a guide roller, wherein a drive supporting device is arranged between the bracket and the guide roller, and the drive supporting device is connected with a core shaft of the winding engine through a drive structure. The drive structure can facilitate the drive supporting device to rotate synchronously with the winding engine, and the position of the guide roller also correspondingly changes along with change of the position of a rope groove on the winding engine, so a transmission direction of the wire rope between the winding engine and the guide device is kept consistent with the direction of the rope groove all the time, so eating phenomena of the wire rope and the rope tank can be effectively prevented, and safe and smooth production line is ensured. The guide device disclosed by the invention has the characteristics of simple structure, convenience for operation, significant effect and the like.

The invention discloses a noise reduction method of a multi-channel active noise reduction headrest. Auricle space position information is obtained through an acquisition and calculation module; a point coordinate on the auricle is selected as a space coordinate of the virtual error microphone; time delay values from the secondary sound source and the physical microphone to the virtual error microphone are calculated through the physical microphone and the secondary sound source with known space coordinates, and a physical secondary path transfer function matrix Gpu from the secondary sound source to the physical microphone is obtained in an off-line modeling mode; a self-adaptive controller performs calculation to obtain a virtual error signal ev according to the reference signal, the physical error signal, the transfer function matrixes Gvu, M and Gpu and the intensity u(n) of the secondary sound source, performs calculation according to the reference signal and the virtual error signal to generate a noise elimination signal, and transmits the noise elimination signal to the secondary sound source; and the secondary sound source receives the noise elimination signal transmitted by the adaptive controller and makes a sound to counteract and reduce the original noise, so that the square of the sound pressure amplitude at the virtual error microphone is minimum.