61 results about "Passive systems" patented technology

A sensor network is attached to a structure and employed to detect and analyze load changes. The sensor network has transducers, capable of acting as both passive sensors and active actuators, integrated within it. In a passive mode, the transducers detect load changes upon the structure, such as impacts. Upon detection of a load change, the transducers are engaged in an active mode to actively scan the impact area to determine the location and size of any resulting damage region. In this manner, passive and active systems are integrated within a single, convenient layer that possesses the best features of both active systems and passive systems.

In accordance with the present invention, a portion of a packetized data stream is copied from a data network without interfering with the flow of the data in the network. A known test signal is then substituted for the information contained in each copied packet to prepare a pseudo-media packet stream. The known test signal is encoded and packetized using the same methods used for the copied data stream. The pseudo-media signal is then recovered from the pseudo-media stream using the same depacketizing and decoding methods to be used on the copied packetized data stream. The recovered signal is an accurate representation of the state of the media stream since it has gone through the same packetization/depacketization and encoding/decoding procedures and includes all of the same faults of the copied data stream. The subjective quality of the recovered signal is then measured providing an accurate measure of the subjective quality of the copied media stream.

A quantified image measurement system that creates accurate physical measurement data from digital pictures is disclosed. Both active and passive system embodiments are described. The system can use any image format and enhances the image file with measurement data and data transformation information that enables the creation of any type of geometrical or dimensional measurement from the stored photograph. This file containing the original digital image along with the supplemental data is referred to as a Quanitfied Image File or QIF. The QIF can be shared with other systems via email, cloud syncing or other types of sharing technology. Once shared, existing systems such as CAD applications or web/cloud servers can use the QIF and the associated QIF processing software routines to extract physical measurement data and use the data for subsequent processing or building geometrically accurate models of the objects or scene in the image. Additionally smart phones and other portable devices can use the QIF to make measurements on the spot or share between portable devices. In addition, the quantified image measurement system of this invention eliminates the need for capturing the image from any particular viewpoint by using multiple reference points and software algorithms to correct for any off-angle distortions.

The invention discloses an electromagnetic butt joint system. The electromagnetic butt joint system comprises a driving system and a driven system, wherein a first electromagnetic coil and a second electromagnetic coil are arranged on the driving system in parallel and in a spaced mode, and a third electromagnetic coil and a fourth electromagnetic coil are arranged on the driven system in parallel and in a spaced mode. Attractive force is generated in the butt joint process of the first electromagnetic coil and the third electromagnetic coil, and repulsive force is generated in the butt joint process of the second electromagnetic coil and the fourth electromagnetic coil. Due to the fact that the driving system and the driven system are respectively provided with each large electromagnetic coil and each small electromagnetic coil, in the butt joint process, the driving system gets close to the driven system at the system initial velocity under the action of the attractive force between the two large electromagnetic coils, and in the getting-close process, the butt joint velocity of the driving system and the driven system slows down under the action of repulsive force of the two small electromagnetic coils till the driving system and the driven system reach the balanced stationary state. Automatic and flexible butt joint of the driving system and the driven system is achieved without a control system.

A passive system for recovering energy and nitrogen oxides from flue gas produced by a boiler, and which employs a particular arrangement of economizer surface to ensure that the temperature of the flue gas entering a selective catalytic reduction (SCR) reactor is maintained within a required range over a wide range of boiler loads.

The invention discloses a gear-rack displacement multiplication type drill string heave compensator for a floating drilling platform, which comprises a traveling block (1), a large hook (2), a gear-rack mechanism (4), a rigid rod (3) and a compensating cylinder system. The compensating cylinder system comprises a piston-type hydraulic cylinder (5) and a gas/liquid storage tank (6), the hydraulic cylinder (5) is fixedly connected onto the traveling block (1), the large hook (2) is connected with the traveling block (1) through a steel wire rope (7), the rigid rod (3) is arranged on the traveling block (1) and connected with the a piston rod through the gear-rack mechanism (4), and a gear shaft for a gear in the gear-rack mechanism (4) is connected with a variable frequency motor. The gear-rack displacement multiplication type drill string heave compensator has the advantages that a driving compensating system and a driven compensating system are adopted to simultaneously achieve response sensitivity, rapidness and precision of compensation of the driving system and low energy consumption and the like of the driven system, the compensator is simple in structure and fine in compensating effect, and adaptability and reliability of the compensator are enhanced.

The invention discloses a gear-rack drill string heave compensator for a floating drilling platform, which comprises a traveling block (1), a large hook (2), a gear-rack mechanism (4), a rigid rod (3) and a compensating cylinder system. The compensating cylinder system comprises a piston-type hydraulic cylinder (5) and a gas/liquid storage tank (6), the hydraulic cylinder (5) is fixedly connected onto the traveling block (1), the large hook (2) is fixedly connected with a piston rod of the hydraulic cylinder (5), the rigid rod (3) is arranged on the large hook (2) and connected with the hydraulic cylinder (5) through the gear-rack mechanism (4), and a gear shaft for a gear in the gear-rack mechanism (4) is connected with a variable frequency motor. The gear-rack drill string heave compensator has the advantages that a driving compensating system and a driven compensating system are adopted to simultaneously achieve response sensitivity, rapidness and precision of compensation of the driving system and low energy consumption and the like of the driven system, the compensator is simple in structure and fine in compensating effect, and adaptability and reliability of the compensator are enhanced.

The invention relates to a time difference of arrival/frequency difference of arrival estimation method of high and low-orbit double-star high-time-varying received signals. The invention aims to solve the problem of large error and large calculation quantity of TDOA (time difference of arrival)/FDOA (frequency difference of arrival) estimation of a high and low-orbit double-star passive positioning system. According to the method of the invention, two segments of data of which the time lengths are equal are adopted to estimate the change rage of frequency difference of arrival, and the estimated values of the TDOA (time difference of arrival) and FDOA (frequency difference of arrival) at the start time point of data acquisition can be calculated accurately. The implementation process of the invention includes the following steps that: (1) two segments of data of which the time lengths are equal are acquired; (2) TDOA and FDOA are jointly estimated; and (3) the estimated values of the TDOA (time difference of arrival) and FDOA (frequency difference of arrival) at the start time point of data acquisition are calculated. With the method of the invention adopted, the fast and accurate estimation of the TDOA and FDOA of high-time-varying received signals in the high and low-orbit double-star passive system can be realized. The method has a high practical value.

The invention relates to a circuit for improving energy transmission efficiency of a non-contact type IC (integrated circuit) card, belonging to the technical field of energy transmission circuits of high-current passive systems. The circuit is characterized by sequentially comprising a matching circuit, a rectifier circuit, a voltage-stabilizing and amplitude-limiting circuit, an energy storage circuit, a current monitoring circuit and a switch control circuit, wherein the matching circuit comprises a plurality of capacitors and a switch, and is used for obtaining best matching; the rectifier circuit comprises a plurality of MOS (metal oxide semiconductor) transistors and is used for converting alternating current voltage to direct current voltage; the voltage-stabilizing and amplitude-limiting circuit comprises a plurality of voltage-stabilizing units and amplitude-limiting units and is used for stabilizing the direct current voltage output by the last stage; the energy storage circuit comprises an energy storage capacitor and is used for storing energy when the field strength is reduced; and the switch control circuit comprises a current reproduction tube and a comparator and is used for controlling a switch in the matching circuit. The circuit disclosed by the invention can improve the energy transmission efficiency by automatically adjusting the matching circuit under the situations of low field strength and large load, can meet the requirements of the non-contact type IC card with a larger load, and can be applied to power supply for all modules in smart IC cards such as a financial IC card and the like.

A heat and mass transfer system configured to be a passive system using gravitational force to form a thin liquid film flow on an outer surface of a flow distribution head and downstream conduit member to subject the thin liquid film to heat transfer mediums. The at least partially spherical flow distribution head creates a uniform thin flow of liquid on the outer surface increasing the efficiency of the heat and mass transfer system. The heat and mass transfer system may include a heat transfer medium supply system in fluid communication with internal aspects of the downstream conduit such that a heat transfer medium flows within the downstream conduit while the liquid film flows on the outer surface of the downstream conduit. Rather than conventional sheet flow on inner surfaces of a conduit, the flow distribution head enables sheet flow to be formed on an outside surface of a component.

Example embodiments disclose a passive system of power and cooling with a liquid metal for a digital system. The passive system may include a digital device operatively coupled to a printed circuit board, a hollow conductive channel body attached to the printed circuit board to circulate the liquid metal to flow within the conductive channel so as to convey electrical power to the digital device during a power loss and transfer heat generated by the digital device, and a tube to deliver the liquid metal in and out of the hollow conductive channel body. A method of operating a liquid metal may involve the use of the passive system.

This invention is based on using rail road system for automatic address transportation of people and cargo. This invention allows usage of existing rail roads, many miles of which are not used or partially used. This invention including design of vehicle that will be using for automatic address transportation. This allows excluding the most complicated part of rail roads—switches, and transform rail road from active to passive system.

A method and apparatus are presented for inductive charging of battery operated devices in a motor vehicle, in which a passive vehicle entry and/or starting system selectively disables or reduces provision of power to a primary coil of an inductive charging station while the passive system communicates with an external user device such as a key fob controller to avoid or mitigate electromagnetic interference.

A cost-effective, passive system for conserving energy during hot, summer months is presented. Earlier inventions in this area such as the attic fan (U.S. Pat. No. 2,746,674) worked by forcing the hot attic air out whenever the attic air temperature reached a predetermined level. The present invention works differently; by preventing heat buildup within the attic. A simple, mechanical system is designed to cover a large portion of the roof with a cloth like synthetic material that has a smooth, light-colored, reflective surface reflecting most of the incident solar energy during the months when the weather is hot. An air gap between this reflective surface and the roof further insulates the roof from the solar heat. This prevents build up of the super heated air in the attic thereby lowering the energy bills to cool the house and conserving energy. During the cooler months, this reflective surface covering the roof is fully or partially retracted as needed.

A system for passively cooling nuclear fuel in a pressurized water reactor during refueling that employs gravity and alignment of valves using battery reserves or fail in a safe position configurations to maintain the water above the reactor core during reactor disassembly and refueling. A large reserve of water is maintained above the elevation of and in fluid communication with the spent fuel pool and is used to remove decay heat from the reactor core after the reaction within the core has been successfully stopped. Decay heat is removed by boiling this large reserve of water, which will enable the plant to maintain a safe shutdown condition without outside support for many days.

Provided is an autofocus control apparatus in an image sensing apparatus which includes: an optical system including a focus lens; a solid-state image sensing device that photoelectrically converts light incident via the optical system into image signals and outputs the image signals; and a focus drive motor that drives the focus lens to adjust a focus position, the autofocus control apparatus comprising: a light-emitting section; and a focus position detector that performs focus position detection according to an active system and focus position detection according to a passive system on the basis of the image signals obtained from the image sensing unit.