64 results about "Indirect coupling" patented technology

A method and apparatus are provided for the secure delivery of converged services to users of wireless devices in a wireless environment. An application layer broker is position between the user devices and the application server to provide an indirect coupling between the enterprise application server and the wireless user devices. The application layer broker links the wireless environment to the enterprise application server through an event triggered content delivery mechanism without providing a direct link between the wireless user device and the enterprise application server. Delivered content can only be accessed by the intended user and the authorized device. The application layer broker provides adaptation to various user devices and the various capabilities associated with each user device. Wireless devices can be upgraded independently from upgrades to the application server. The decoupling performed by the application layer broker separates the service control, such as user registration from the service delivery.

A method and apparatus are provided for the secure delivery of converged services to users of wireless devices in a wireless environment. An application layer broker is position between the user devices and the application server to provide an indirect coupling between the enterprise application server and the wireless user devices. The application layer broker links the wireless environment to the enterprise application server through an event triggered content delivery mechanism without providing a direct link between the wireless user device and the enterprise application server. Delivered content can only be accessed by the intended user and the authorized device. The application layer broker provides adaptation to various user devices and the various capabilities associated with each user device. Wireless devices can be upgraded independently from upgrades to the application server. The decoupling performed by the application layer broker separates the service control, such as user registration from the service delivery.

The invention relates to a remote field eddy current based metal pipeline defect detection device. The device comprises a computer, an STM32 development board, a power amplifier, a first exciting coil, a second exciting coil, a first detecting coil, a second detecting coil, a driving rod, a stepping motor and a shielding plate; the computer controls the STM32 development board to generate a sinusoidal signal which is amplified by the power amplifier prior to being loaded on the first exciting coil and the second exciting coil, a magnetic field generated is propagated in two different coupling paths which are an indirect coupling energy path and a direct coupling energy path respectively, indirect coupling magnetic field signals are measured through the first detection coil and the second detection coil, the signals are acquired into the STM32 development board, and whether defects present or not can be visually displayed by observing amplitude of the signals and phase changes. Hall elements and oscilloscopes are not required, and the detection device has the advantages of high operability, low cost and the like and can be applied to various practical engineering.

Disclosed is an electronic circuit for the bidirectional conversion of a high input voltage to a direct-current output voltage with indirect coupling, more specifically such a circuit for use in a power supply system for rail vehicles, that is provided with a primary converter, one single common transformer and a secondary converter. The primary converter includes at least three primary converter sections connected in series, the output lines of which are each connected to a respective one of the transformer primary windings.

The invention relates to an indirect coupling conic fiber grating ultrasonic sensor. According to the indirect coupling conic fiber grating ultrasonic sensor, an upper end of a casing is provided with a sealing cover for processing a center hole, a sealing cover noise abatement pad is arranged between the sealing cover and the casing, a lower end of the casing is provided with a sound coupling cone, a sound coupling noise abatement pad is arranged between the sound coupling cone and the lower end of the casing, the top portion of the sound coupling cone is provided with a light guide fiber mounting hole through processing, one end of a light guide fiber is arranged in the light guide fiber mounting hole, the other end of the light guide fiber penetrates through the center hole of the sealing cover, the light guide fiber is provided with a grating, grating zone length of the grating is 1-10mm, and wavelength is 1540-1560nm. Based on tests, the sensor has excellent response performance, stability and sensitivity for 300KHz wave band ultrasonic signals, under the real-time acquisition mode, the spectrum signal to noise ratio is high, the ultrasonic signals reflected on upper and lower surfaces of organic glass can be intelligibly identified, the ultrasonic signals are suitable for dynamic scanning acquisition in an earthquake physics model, ultrasonic multi-layer imaging can be realized, and the sensor can be applied to the nondestructive structure test, oil and gas field physics model imaging, elastic wave speed modeling and biologic and medical technology fields.

The invention discloses an extensible quantum information processing system and method, and relates to the technical field of quantum computing. The structure of the extensible quantum information processing system comprises a columnar diamond sample, an optical system, a microwave system, a magnetic field system, a carbon nanotube double-quantum-dot sample, a low-temperature system, a data acquisition system and an electric control system. The invention provides a carbon nanotube-spinning hybrid quantum system, wherein microwave signals and a magnetic field are applied to an area where each group of nitrogen vacancy centers and quantum dots are located, and magnetic dipole-dipole interaction exists between electrons of each group of nitrogen vacancy centers and the quantum dots; and by controlling a magnetic field and a microwave signal, indirect coupling between two nitrogen-vacancy centers which are spaced by a micron dimension can be realized through the action of the carbon nano tube, and quantum entanglement between the two nitrogen-vacancy centers in a long distance is realized, so that an extensible quantum information processing method is provided.

A system and method for compensating for process, voltage, and temperature variations in a circuit is provided. A system includes an inverter having an input port, and an output port, and is configured to (i) receive an input signal, (ii) delay the received input signal, and (iii) provide the delayed signal to the inverter output port. The system also includes a logic device including at least two input ports and an output port. A first of the at least two input ports is configured to receive the delayed signal. Finally, the system includes a charge storing device having a first end coupled, at least indirectly, to a second of the at least two input ports and a second end coupled to a logic device common node. The charge storing device is configured to (i) receive the input signal and (ii) sense a rate of change in voltage of the received input signal, the sensed voltage being representative of a corresponding current. The logic device output port is configured to output an output signal responsive to the delayed signal and the corresponding current.

Systems and methods of downhole power generation are disclosed, which provide for the generation of electrical power in a downhole environment by the use of an electrical generator coupled to a hydraulic circuit that receives energy from a source in the downhole environment. The hydraulic circuit can receive energy from flowing drilling fluid and / or from kinetic energy of one or more portions of the drill string. A direct or indirect coupling can be used to transfer energy from the downhole environment to a pump in the hydraulic circuit, which can act as a hydraulic flow source, providing flow through a flow regulation device or control circuit. The hydraulic fluid under such control can then be used to turn a hydraulic motor, which is used to turn an electric generator for the generation of electricity for downhole tools such as logging tools, related telemetry, and the like.

The invention discloses a cereal bionic rubbing threshing test bed. The cereal bionic rubbing threshing test bed is composed of an upper threshing device, a lower threshing device, a tracking observing device, an instrument device and a rack. The test bed can test three threshing modes including moving rubbing, rotating rubbing and combined rubbing through the rotation of an upper threshing platform and the reciprocating movement of a lower threshing platform. By means of the mounting and dismounting of an upper threshing roller, two working planes of indirect coupling rubbing and direct coupling rubbing are formed through an upper threshing bionic sample piece and a lower threshing bionic sample piece. The height of the upper threshing platform is adjusted by adjusting bolts, a high-speed vidicon is used for shooting the cereal threshing microprocess, a tension sensor is used for detecting horizontal rubbing force, a variable-frequency speed controller is used for changing the revolving speed of an upper threshing motor and the revolving speed of a lower threshing motor, and stepless speed regulating and speed displaying of the rubbing movement are achieved. The lower threshing device moves through a crank and rocker mechanism, and the movement of the lower threshing device is high in bionic approximation degree of the manual wheat rubbing behavior. The cereal bionic rubbing threshing test bed is high in rubbing threshing test micro-testing capability, complete in testing index, good in universality and simple in structure, and the test sample pieces are installed conveniently.

An acoustic transducer includes a housing, a plurality of diaphragms suspended from the housing and separated into one or more groups, and one or more motors combined with the housing that operate in response to an electrical signal. The diaphragms of each group are driven by a respective motor to which all the diaphragms in the group are coupled and at least one motor has an indirect coupling with no direct mechanical connection to the diaphragms driven thereby. One or more electromagnetic motors that drive one or more sets of multiple diaphragms to provide acoustically efficient loudspeaker systems having dimensions that allow use in applications that would be difficult or impossible with traditional transducers.

The invention discloses a simulation method for directly coupling three loads of temperature, pressure and vibration on a sensor. The method comprises the following steps: firstly, converting a frequency domain signal of a vibration load into a time domain signal, and expanding to obtain a long-time time time domain signal; adopting ANSYS work bench software to model the sensor, and completing pretreatment; performing simulation setting of direct coupling; wherein the simulation solving step length is 2; in the first solving step, applying a pressure load and a temperature load to the sensor;in the second solving step, enabling a long-time time domain signal to serve as a vibration load to be applied to the sensor, performing direct coupling simulation of the three loads to obtain stressdistribution of the whole structure of the sensor within the whole simulation time wherein the sub-step length of the second solving step is not larger than the minimum time length of change of the long-time time domain signal; and performing post-processing on the simulation result to obtain a simulation maximum value of the sensor under coupling of three loads. According to the simulation methodprovided by the invention, the problems of errors, boundary constraint conflicts and difficulty in exporting an initial stress file in frequency domain simulation of an indirect coupling simulation method are solved.

The invention provides a weld joint array far-field eddy current detection probe which at least comprises an excitation unit used for generating an excitation magnetic field, a detection unit used forpicking up eddy current field signals containing detected weld joint defect information in a far-field mode, and a shielding unit used for blocking a direct coupling electromagnetic field induced bythe excitation unit. The excitation unit comprises an excitation magnetizer and an excitation coil wound on the excitation magnetizer, the detection unit comprises a detection coil group perpendicularto the trend of the weld joint, and the shielding unit comprises a first shielding piece capable of accommodating the excitation unit and the detection unit. The invention further provides welding seam array far-field eddy current testing. According to the invention, a low-frequency electromagnetic field generated by the excitation coil can permeate into the weld joint and form an indirect coupling electromagnetic field in the weld joint, so that the detection coil group in a far field area can pick up an eddy current field signal containing defect information of the detected weld joint, andthe aim of detecting hidden defects in the weld joint is fulfilled.

A method and mechanism of the indirect coupling torque control provides a rotary impact mechanism driving a rotary drive mechanism linked between the rotary impact mechanism and a fastener member, when the rotary impact mechanism rotates the fastener member. The rotary drive mechanism can accumulate a rotation stress generated by the rotary impact mechanism to rotate the fastener member. When the rotation stress accumulated in the rotary drive mechanism is larger than the torque value applied to the fastener member, a linear relation between a sensed signal measured from the stress accumulated in the rotary drive mechanism and the torque value applied to the fastener member is provided. Whereby the linear relation is used to control the torque valued applied to the fastener member when the rotary impact mechanism is rotating.

Through indirect coupling, the method inputs outer AC signals to target cables in a set of cable. The other end of the set of cable outputs coupled AC current of each cable respectively. Detecting phase of each coupled output current, the method selects target cables based on phases. The invention also discloses a cable identification instrument. Before identifying cable, the method does not need to disconnect connections between two ends of each cable and equipment of transformer, switchgear, i.e. cable is in electrification state. Features are: simplifying operation for identifying cables, raised efficiency for identifying cables, reducing emergent loss caused by power cut so as to guarantee quality of service.

The invention discloses a power converter and an inductance structure, the power converter comprises an inductance structure, and the inductance structure comprises a first inductance coil, a second inductance coil, a third inductance coil, a fourth inductance coil and an Nth inductance coil and a coupling coil. Each path of inductance coil and the corresponding transistor form a power level circuit so as to generate an output signal at the output end of the power level circuit; and the coupling coil and each path of inductance coil form a negative coupling relationship. Negative coupling among the multiple inductors is achieved in an indirect coupling mode, transient response of large current application is solved, and current sharing among the multiple inductors is achieved.