769results about How to "Long range" patented technology

A system utilizing a personal security device to provide access to a computer terminal where the personal security device includes circuitry and transceiver components for transmitting identification information and exchanging other digital information with a computer terminal and other compatible devices and the personal security device establishes a communication link with a computer terminal to allow a user to logon to the terminal so that when a user leaves the computer terminal, the communication link is terminated, causing the computer terminal to lock the keyboard, blank the monitor, and / or logoff the user if the communication link is not restored within a sufficient time period and also allowing the personal security device to facilitate subsequent computer access within a time range by providing time related access codes to the terminal that can be used to reestablish computer terminal access.

In a transponder (19) for amplification of a received signal (60) into an antenna (1), to a signal (61) for retransmission, and where the retransmitted signal (61) possibly may have information superimposed, a quenched oscillator (5) is incorporated as amplifying element. The oscillator (5) is preferably of superregenerative type and exhibits negative resistance (30) for the received signal (60). Transponders according to the present invention may be introduced as system elements in a wireless or wire based network to work as intelligent or unintelligent connections in the network. The transponders can also be used in positioning systems.

A multi-resolution object location system and method for locating objects is provided. The multi-resolution system and method uses a long-range object locator together with a more precise RFID locator to efficiently and accurately determine the location of objects that include an RFID tag. The long-range object locator has a relatively longer range and can cover a relatively large area to determine the general location of the object within the large area. The RFID locator has a relatively shorter range, but is able to locate the object more precisely. The object location system uses the long-range locator to first determine the general location of the object, and then the RFID locator is used to determine a more accurate location of the object. Thus, the multi-resolution object location system is able to provide both a long range location of objects over a large area and a precise location of objects.

An advanced internal combustion-electric hybrid airplane, having at least double the flight range and flight duration than a conventional equivalent airplane, while using the same amount of any desirable fuel. This is achieved by using 2-3× smaller and ultra-lightweight engine for cruising, and ultra-lightweight electric motor powered by lithium batteries during take-off and climbing. The electric motor becomes a generator during cruising and descent, recharging said batteries. The airplane has also temporary silent electric stealth capability and added safety by the electric back-up power. Due to its high efficiency, the operational cost is substantially reduced. Additional features include highly advanced, minimum drag and weight airframe.

A multi-resolution object location system and method for locating objects is provided. The multi-resolution system and method uses a long-range object locator together with a more precise RFID locator to efficiently and accurately determine the location of objects that include an RFID tag. The long-range object locator has a relatively longer range and can cover a relatively large area to determine the general location of the object within the large area. The RFID locator has a relatively shorter range, but is able to locate the object more precisely. The object location system uses the long-range locator to first determine the general location of the object, and then the RFID locator is used to determine a more accurate location of the object. Thus, the multi-resolution object location system is able to provide both a long range location of objects over a large area and a precise location of objects.

Particle beam irradiation equipment and a method of adjusting irradiation nozzle, which can ensure a long range and high dose uniformity at any field size are provided. The particle beam irradiation equipment comprises charged particle beam generation equipment and an irradiation nozzle for irradiating a charged particle beam extracted from the charged particle beam generation equipment to an irradiation target. The irradiation nozzle comprises a first scatterer device including a first scatterer for spreading out the charged particle beam into a Gaussian-like distribution, and multiple stages of second scatterer devices including second scatterers for producing a uniform intensity distribution of the charged particle beam having been spread out into a Gaussian-like distribution by the first scatterer. For forming irradiation fields having sizes different from each other, the second scatterer devices are disposed downstream of the first scatterer device in the direction of travel of the charged particle beam at the spacing depending on the difference in the field size.

The loss prevention system is a system to prevent articles from becoming lost, misplaced, or stolen. The articles are tagged with, or contain, an identifying device such as an RFID tag or a wireless network interface. The identifying device allows the articles to be monitored by a monitor. The monitor periodically interrogates each identifying device with a transmitted RF signal, and generates an alarm signal if an interrogated identifying device does not reply or is out of range. The identifying devices can be acquired by the monitor and associated with an alias that can be used to associate the identifying device with its associated article.

A resource allocation method for use in a wireless ATM network comprises receiving on a wireless signaling channel a request for access to a shared frequency-time sliced wireless medium. A channel matrix is then searched for a set of available frequency-time slots. The channel matrix represents a time frame within the shared frequency-time sliced wireless medium, and is used to keep track of resource allocation in the time-frequency sliced medium. The set of available time-slots is then allocated if the allocation does not violate a frequency switching constraint, and if the set of available frequency-time slots contains a number of slots no smaller than a requested number of slots. In a preferred embodiment of the invention, the searching step uses a greedy resource allocation strategy to search a channel-chunk matrix comprising a list of contiguous chunks of available time slots in each frequency of the shared frequency-time sliced wireless medium. The greedy resource allocation strategy comprises the following successive allocation steps: searching for a single contiguous set of available time slots in a single frequency, where the size of the set of available slots is equal to the requested size [60]; searching for a single contiguous set of available time slots in a single frequency, where the size of the set of available slots is greater than the requested size [64]; searching for separate chunks of available time slots in a single frequency [66]; and searching for separate chunks of available time slots in multiple frequencies [68]. Each allocation step comprises checking whether the allocation violates a frequency switching constraint.

The present invention provides a displacement detection apparatus uses short scales and can provide a long measurable range comparable to a single long scale with a short bed length. The displacement detection apparatus includes a scale, a first head and a second head adapted to detect periodic analog signals of a plurality of different types, a first processing section and a second processing section that detects the first differential value and the second differential value between the immediately preceding positional data and the current positional data obtained by sampling the periodic analog signals of a plurality of different types, a switching section that selectively switches from the first differential value to the second differential value or vice versa, a scale position detection section that detects the scale getting to a predetermined position relative to the first head or a predetermined position relative to the second head, a switching control section that causes the switching section to switch from either of the differential values to the other in response to the detection of the scale getting to the predetermined position, and an addition section that adds the first differential value or the second differential value selectively switched by the switching control section and outputting it as positional information.

The present invention involves a network polling protocol which treats the network as a logical ring or linear sequence of nodes linked together so that a polling request is simply propagated down or around the network one node at a time until a complete inventory of active nodes is achieved. The protocols also includes procedures for curing or repairing breaks in the linking protocol and for adding new nodes to the linking protocol. The linking protocol can also be used to establish hierarchal linked networks where top level hierarchies includes addresses to a permanent member of a linked network and bottom level hierarchies are a given linked network.

A dual frequency identification system for animals is contained within an ear tag structure adapted to be attached to an animal's ear. The system includes a first radio frequency component having a first antenna that operates at a first frequency, and a second radio frequency component having a second antenna that operates at a second frequency higher than the first frequency. The radio frequency identification system is programmed to transmit the same identification code from both of the first and second antennas, whereby the tag can be interrogated by reader antennas operating at different frequencies to identify the same animal. Various constructions for the ear tag are disclosed in which the first and second frequency components are molded into the plastic parts of the ear tag.

A method is disclosed of producing an RFID tag assembly including an associated antenna and attachment means suitable for attaching the tag assembly to a material. The material may be flexible such as fabric or relatively rigid such as cardboard. The method includes forming the associated antenna and the attachment means as a unitary conductive frame. An RFID tag assembly produced by the method is also disclosed.

The present invention is directed to a process for making nanoparticles of metals, metal alloys, metal oxides and multi-metallic oxides, which comprises the steps of reacting a metal salt dissolved in water with an alkali metal salt of C4-25 carboxylic acid dissolved in a first solvent selected from the group consisting of C5-10 aliphatic hydrocarbon and C6-10 aromatic hydrocarbon to form a metal carboxylate complex; and heating the metal carboxylate complex dissolved in a second solvent selected from the group consisting of C6-25 aromatic, C6-25 ether, C6-25 aliphatic hydrocarbon and C6-25 amine to produce the nanoparticles.

A xenon arc searchlight or illumination system incorporates a quick change release and assembly so that the lamp, reflector and battery assemblies are easily field replaceable without tools. The lamp, ballast, battery and charger are provided in a single rugged package which can be sealed for field use. The searchlight is combined by an appropriate mounting adaptable with other optical detector devices such as cameras, binoculars and night vision telescopes. The beam output is similarly usable with a combination of filters to allow the most varied intensity and wavelengths for a particular application, such as smoke filled environments, surveillance employing near-infrared or infrared illumination, ultraviolet, underwater illumination or illumination with any color in the visible range.

A scanning 3D imager for recording images of a scene comprises a light source configured to emit a fan-shaped pulsed light beam with linear cross section, a scanning mirror arranged in the light path of the light beam to guide the light beam into the scene and to successively illuminate slices of the scene by sweeping the light beam through the scene transversally to the linear cross section thereof, and an imager chip arranged to receive light from the scene via the scanning mirror, the imager chip comprising an photosensor array disposed in such a way that the illuminated slices of the scene are successively imaged thereon.

A method of printing a document using a mobile device includes establishing a first connection between a mobile device and a printer using NFC to identify the mobile device to the printer; establishing a second connection between the mobile device and the printer using WiFi; transferring a document from the mobile device to the printer over the second connection using the WiFi; and printing the document using the printer.

The invention relate to a collision avoidance apparatus (100, 200, 300, 22), system (10) and method (500). The apparatus (100, 200, 300, 22) includes a UHF (Ultra High Frequency) transceiver (102) operable to send and receive UHF signals in electric field (E-field) mode, a VLF (Very Low frequency) transceiver (104) operable to send and receive VLF signals in magnetic field (H-field) mode, and a SHF (Super High Frequency) transceiver (106) operable to send and receive SHF signals in electric field (E-field) mode. The apparatus (100, 200, 300, 22) further includes a control module (110) operable to direct the operation of the respective transceivers (102, 104, 106), thereby to detect receipt of a signal via at least one of the transceivers (102, 104, 106), and determine whether or not an alert is to be issued, based on the nature of the received signal. The apparatus (102, 104, 106) also includes an output arrangement (112) operable to issue an alert in response to instruction from the control module (110) to do so.

The present invention relates to a transponder comprising an antenna structure (31) configured to receive an incoming signal with RF power of a first frequency f1 and to retransmit the incoming signal as a transparent output signal with RF power of a second frequency f2 when hit by the incoming signal. The transponder further comprises: an amplifier (39) configured to provide an amplified transparent output signal based on the incoming signal; a frequency converter (35) configured to frequency convert the incoming signal into the transparent output signal; and a first frequency filter (33) connected to the antenna structure. The first frequency filter is tuned to the first frequency f1 to avoid amplifying incoming signals with RF power of frequencies other than the first frequency f1. The transponder further comprises a sensor (S) configured to respond to physical stimulus for generating a control signal as output response, and an activator for selectively activating or deactivating the possibility to retransmit based on the control signal of the sensor.

The invention discloses a rope net type space debris capturing and cleaning system which comprises a transmission subsystem and a fly net subsystem. The transmission subsystem comprises a transmitter, a net cabin, a net cabin cover ejecting device, a buffer device, a tying rope tension control device and a tying rope cutter, and the fly net subsystem comprises a rope net and four mass blocks; a net cabin cover can be ejected out of an outlet of the net cabin, and the rope net can be driven by the net cabin cover to be drawn out of the net cabin; the transmitter works at the moment when the fly net and a tying rope are straightened, the sides of the rope net are driven by four mass blocks according to preset transmitting opening angles, so that the rope net can fly out and is opened simultaneously until the rope net is fully opened, an object is netted after the rope net reaches the objective position, a port of the rope net is tightened under the control of the mass bocks, and the object can be completely captured; after the tying rope draws the captured object aircraft away from an orbit, the tying rope cutter cuts off the tying rope, and the object aircraft can be separated from a satellite platform. The rope net type space debris capturing and cleaning system has the advantages that a secondary transmission mode is adopted, so that twining and knotting can be prevented in rope net spreading procedures; the mass blocks are pushed to be synchronously transmitted, so that a millisecond-level synchronous transmission effect can be realized, and the shape of the rope net can be controlled advantageously.

The invention relates to a method for evaluating the construction quality of a tunnel, and discloses a method for evaluating the construction quality of tunnel drilling and blasting based on three-dimensional laser scanning. The method comprises the following steps of: acquiring data by adopting a tunnel data acquisition module at first, and then processing the acquired data by adopting a tunnel data pre-processing module, building a tunnel three-dimensional model building module according to the processed result, performing post-processing by adopting a tunnel three-dimensional model post-processing module, and finally, evaluating the result by adopting a tunnel drilling and blasting quality evaluation module. The method discloses by the invention has the advantages of being wide in measurement range, strong in applicability, high in automation degree, and good in reliability.

A power delivery system for an electric vehicle provides efficient power management for either continuous or intermittent high-performance operation, using a boost stage and an on-board charging circuit. A main battery, configured as a high-capacity power source, supplies power to the electric motor under normal load conditions. An auxiliary boost battery assists the main battery in supplying a high-level current at a higher discharge rate thereby causing the motor to operate in a high-performance drive mode. A charging circuit recharges the boost battery from the main battery during operation of the motor. The charging circuit also maintains a charge balance between the boost battery and the main battery when the two batteries have different chemistries. In one embodiment, participation of the boost battery in powering the electric motor can be controlled automatically according to sensed changes in the load. In another embodiment, power management can be based on timed intervals.

A xenon arc searchlight incorporates a high frequency / high efficiency electronic circuit that allows lamp ballasting and charging of the system battery to occur over a wide range of external DC power supplies. The xenon arc searchlight has a converter circuit coupled to both the battery, the ballasting circuit and the arc lamp for converting DC voltage from the battery to pulse width modulated switched current to the arc lamp in which the DC voltage is switched by parallel switching transistors. The ballisting circuit is controllable by a switch to vary current supplied to the converter circuit and hence intensity of the lamp which discrete steps in intensity of the lamp are not visually perceptibly different between one step to a next step in the sequence of steps of the current to the lamp. The lamp, ballast, battery and charger are provided in a single rugged package.

A battery heater / cooler increases mileage, comfort and / or safety in a conventional, electric or hybrid electric vehicle. An enclosure around the battery or batteries includes an inlet for heated or cooled air or liquid and an outlet to facilitate the transfer of heated or cooled air into a passenger compartment. A second battery unit may be used in conjunction with a timer or a remote controlled device to pre-heat or pre-cool itself and the primary battery or batteries and / or passenger compartment before commute times.

The present invention provides a method and system for establishing a highly mobile, long range secure wireless network with dynamic topologies and near full connectivity with acceptable latency using low cost, low power, compact and lightweight devices. One aspect of the system deals with a highly mobile network with dynamic network topologies and a time varying wireless medium that has neither absolute nor readily observable boundaries outside of which radio nodes are known to be unable to receive network frames, although the desirable open field boundary is 1 mile in radius from a base station node. A synchronous frequency hopping technique is used with mobile nodes that can become slave base station nodes to a master base station node to increase the effective range of the master base station without increasing the transmit power. Furthermore, the use of adjustable sleep times for the mobile nodes, as well as a novel clock calibration method, provides a substantial range increase with acceptable battery size and system latency.