123 results about "Direct coupling" patented technology

According to the three-dimensional stacked photoelectric co-packaging structure and the packaging method thereof provided by the invention, the three-dimensional stacked structure is formed by bonding the optical chips with C2W of the adapter plate wafer, and the optical chips can be allowed to be processed separately and then bonded on the adapter plate wafer, so that the complexity of the packaging process is reduced, and the packaging reliability is improved; besides, a bonding pad of each layer of optical chip bonding pad region is in contact connection with a part of conductive via holes of the electric interconnection region, and an upper layer optical coupling region is arranged to shrink outwards relative to a lower layer optical coupling region to expose a first optical coupler in the lower layer optical coupling region, so that the areas of the optical chips are sequentially increased from bottom to top along the thickness stacking direction of the photoelectric switching structure; the electric interconnection structure is arranged on the outer side edge of the optical chip to form an inverted pyramid shape, the electric interconnection structure is distributed on the outer side edge of the optical chip, a conductive column structure can be effectively prevented from being manufactured on the optical chip, the process complexity is reduced, meanwhile, the optical interconnection structure is also distributed on the outer side edge of the optical chip, light in the optical chip can be directly coupled to a photoelectric transmission layer, and too high efficiency loss caused by too many optical coupling times is avoided.

The invention relates to an active antenna comprising a single-turn loop, for example an antenna for radio communications and / or electromagnetic field measurements. An active antenna according to the invention comprises: a first element (11), the first element being an electrical conductor; a second element (12), the second element being an electrical conductor; a third element (3), the third element being an electrical conductor, a first end of the third element being directly coupled to a first end of the first element and to a first end of the second element; and a differential amplifier having a positive input terminal coupled to a second end of the first element, a negative input terminal coupled to a second end of the second element, and a reference node coupled to a second end of the third element, an output port of the active antenna being coupled to an output of the differential amplifier.Figure for abstract: Figure 4.

The invention relates to a seabed trapezoidal foldable electromagnetic coil device, which belongs to the technical field of ocean electromagnetic detection and comprises a main bearing beam, an expandable transmitting coil assembly, a receiving coil assembly, a transmission connecting rod, a hinged rotating seat, a sliding connecting seat and a push-pull driving rod. The transmitting coil is of a symmetrically-distributed trapezoidal structure, the receiving coil is in sliding fit with the main bearing beam through the sliding connecting base, the push-pull driving rod is in linkage with the receiving coil to move and the transmitting coil to be unfolded / folded, the device frame is made of a macromolecule non-magnetic material, and the ferromagnetic driving component is arranged in an avoiding mode. Receiving coil plane magnetic field balance is achieved through the non-uniform magnetic field design of the trapezoidal transmitting coil, coil space optimization configuration is completed through a linkage mechanism, folding portability and anti-interference performance of a multi-layer coil are achieved at the same time, direct coupling of a primary field of the transmitting coil to receiving is effectively restrained, the stability and the signal-to-noise ratio of a detection signal are improved, and the detection precision is improved. The method is suitable for complex seabed transient electromagnetic detection scenes carried by AUV / ROV.

The invention relates to a current standard source device based on a quantum effect. The current standard source device comprises a first microwave source, a first programmable Josephson voltage standard module, a first quantum Hall resistor module and a low-temperature resistance comparator. The first microwave source is used for generating first microwaves provided for the first programmable Josephson voltage standard module; the first programmable Josephson voltage standard module is directly coupled with the first quantum Hall resistor module and is used for generating adjustable quantization voltage according to the frequency of the first microwave and loading the adjustable quantization voltage on the first quantum Hall resistor module to form quantization current; and the low-temperature resistance comparator is respectively connected with the first quantum Hall resistance module and an external current source, and is used for comparing the quantized current with the current generated by the external current source to form an output current. According to the invention, errors of series resistors and contact resistors in traditional double-line connection can be eliminated.

The invention belongs to the field of short-circuit current calculation, and discloses a fault analysis method based on a power network equation and a related system.Unified modeling of the overall structure of a power system is achieved by obtaining bus information of the power system and constructing a system topological relation model, and the fault analysis accuracy is improved. The adaptation difficulty caused by different system scales and different wiring modes is avoided, and the universality and the expandability of the method are improved; according to the method, an automatic processing mechanism is introduced into the calculation and decomposition of the admittance matrix, so that the positive sequence admittance matrix, the negative sequence admittance matrix and the zero sequence admittance matrix of the power system can be quickly obtained, manual derivation and gradual simplification processes are reduced, the probability of analysis errors is reduced, and the stability of a calculation result is improved; a three-sequence network equation is uniformly adopted in fault calculation to solve a framework, and a direct coupling relation between an admittance matrix and a short circuit operation condition is utilized, so that key to-be-solved quantities such as fault current and voltage can be quickly and accurately obtained, the calculation process is remarkably shortened, and the analysis efficiency is improved.

The invention relates to the technical field of compressed sensing, and particularly discloses a sparse adaptive system identification method and system based on inverse QR decomposition, and the method comprises the steps: a receiving signal obtaining step: transmitting a transmitting signal to a detected target, and then obtaining a receiving signal, the receiving signal comprises a direct coupling interference signal and a target signal; an estimation signal obtaining step of obtaining an estimation signal corresponding to the transmitting signal based on the transmitting signal through an adaptive filtering model based on inverse QR decomposition; and an identification step: eliminating the direct coupling interference signal through the estimation signal to obtain the target signal.

The invention relates to a passive antenna having a shielded frame, for example an antenna for producing a known radio-frequency magnetic field in a laboratory. A passive antenna according to the invention comprises: a first element (1), the first element being a transmission line having an outer conductor (11) and an inner conductor (12), the first element being a part of a shielded frame; a second element (2), the second element being a transmission line having an outer conductor (21) and an inner conductor (22), the second element being a part of the shielded frame, one end of the inner conductor of the transmission line of the second element being directly coupled to one end of the inner conductor of the transmission line of the first element; a base (3); a single-port linear device having a resistor and a capacitor; and a port of the passive antenna. Figure for abstract: Figure 6.

A smartphone casing with an LED flashlight unit and battery pack. The casing is sized to partially encapsulate the shell of a smartphone. The back wall includes an LED light unit coupled to a battery pack. An LED activation button provides a direct coupling between the battery pack and the LED light unit. The power pack independently stores electrical power in its lithium-ion pack. There are 5 sequential modes. The first three modes initiate light emission at 600* lumen, 400* lumen and 200* lumen. The fourth mode is termed a Strobe Self-Defense to stifle and hinder an assailant in a hostile situation. The fifth mode is a Beacon to give a signal of emergency.

The application belongs to the technical field of electric data processing, and particularly relates to a nonlinear unit construction method based on dimension expansion. The shell unit nodes are classified and information is stored; the normal of the shell unit is calculated; new nodes are expanded on the positive and negative sides along the normal according to the thickness, and corresponding three-dimensional solid units are generated; the junctions at the unit connections are specially processed to maintain the connectivity; and the original constraint conditions are converted and applied to the expanded new nodes. The method significantly improves the calculation accuracy and boundary adaptability, greatly reduces the development complexity of the nonlinear unit, and facilitates the direct coupling analysis of beams, shells, solids and other units in a unified three-dimensional system.

The invention belongs to the technical field of petroleum well logging, and discloses a method for eliminating array induction direct coupling signals, which comprises the following steps of: calibrating the unit thickness change of an adjusting piece and the quantitative contribution of each receiving coil direct coupling signal through electromagnetic simulation modeling and an underground environment equivalent experiment; the target thickness is solved and replaced through a linear correction model, closed-loop calibration is matched to enable a direct coupling signal to approach a preset threshold value, based on array induction logging, an existing three-coil system structure is difficult to thoroughly offset the direct coupling signal due to machining errors, useful signal extraction is seriously disturbed, the method does not need to modify a core structure of an instrument, operation is easy and convenient, adaptability is high, and the method is suitable for large-scale popularization and application. Direct coupling signals are eliminated accurately and thoroughly, the measurement accuracy of the stratum conductivity is effectively improved, and reliable data support is provided for oil and gas reservoir identification and evaluation.

There is provided a device for acquiring biometric electrical signals comprising at least two electrodes. The device also comprises a current supply comprising a direct current supply, an alternating current supply, and a switch actuatable to switch selectively between the direct current supply and the alternating current supply. The device further comprises a capacitive coupling to couple each electrode to the current supply, a direct coupling to couple each electrode to the current supply, and a switch actuatable to switch selectively between the direct coupling and the capacitive coupling. The device also comprises a data acquisition module.

The invention relates to an exterior mirror assembly for a vehicle. The exterior mirror assembly (1) comprises a support base (19), a lens (20) coupled to the support base, the lens (20) in turn comprising: a housing comprising a cover frame (7); a back plate (2) having an outer side surface (2a) and an inner side surface (2b); a mirror surface (3) supported on an outer side surface (2a) of the back plate (2); and an actuator (4) comprising a movable member (6). The back plate (2) is coupled to the movable part (6) of the actuator (4) such that the back plate (2) can be moved by means of the actuator (4), and the cover frame (7) is also coupled to the movable part (6) of the actuator (4). The coupling between the back plate (2) and the movable part (6) of the actuator (4) and the coupling between the cover frame (7) and the movable part (6) of the actuator (4) are direct couplings.

A transmission device (21) is provided with an input shaft (22), an output shaft (23), a planetary continuously variable transmission mechanism (24), a direct coupling mechanism (27), an idler element (28), a multi-speed transmission mechanism (26), and a controller (25). A controller (25) controls the rotational speed of a first transmission member (33) of the planetary continuously variable transmission mechanism (24) and the engagement and disengagement of a first clutch (27C) of the direct coupling mechanism (27). The controller (25) can switch the transmission device (21) to three transmission states, namely a first transmission state (stepless speed change), a second transmission state (internal lock) and a third transmission state (external lock).

A semiconductor integrated circuit (IC) device includes a first conductive source / drain region connected to a second conductive source / drain region by a plurality of active 2D material channels. The device further includes a conductive contact directly coupled to a bottom of the first conductive source / drain region, a liner directly coupled around an upper portion of the conductive contact, and a backside contact directly coupled to a lower portion of the conductive contact. The liner may reduce damage to the conductive contact that may occur during the formation of the backside contact.

A laser assembly is provided. The laser assembly includes a printed circuit board; a laser sub-assembly including a thermo-electric cooler and an optical train, wherein the laser sub-assembly is configured to connect to the printed circuit board such that the optical train is disposed between the printed circuit board and the thermo-electric cooler, wherein the thermo-electric cooler is configured to extract heat from the optical train outwardly from the printed circuit board, and wherein the laser assembly is configured to connect optically with a photonic integrated circuit via free space. Advantageously, the laser assembly includes a top-down approach where the thermo-electric cooler radiates heat outward, supports a pre-assembled approach, and uses free space connectivity for the laser path to the photonic integrated circuit, i.e., no fiber connections.

A medical lead for implantation includes an electrode assembly having a plurality of electrodes. Each of the plurality of electrodes include a plurality of electrode segments. Each electrode segment has a flexible conductor directly coupled to it. A strut is coupled within each of the plurality of electrodes such that each of the flexible conductors coupled to the plurality of electrode segments are supported between the strut and each of the plurality of electrodes by the strut. An insulator fills gaps between the plurality of electrodes, the strut and the flexible conductors.

A diffraction grating coupler (10) is provided with: a diffraction grating (12) having a plate-shaped base material (121) and different refractive index regions (122) that are periodically arranged in a one-dimensional or two-dimensional manner within a predetermined range of the base material (121) and have a refractive index different from that of the base material (121); and a light reflecting section (14) provided at an end of the range on the opposite side from the light input section (13) side, the different refractive index region (122) having a planar shape in which the absolute value of the direct coupling coefficient (kappa 1D) is less than 1 / L, the direct coupling coefficient (kappa 1D) is an index indicating the intensity of light traveling from the light input unit (13) in a first direction (positive x-direction) parallel to the base material (121) reflected in the different refractive index region (122) in a second direction (negative x-direction) that differs by 180 DEG from the first direction (positive x-direction) without any radiation loss. The 1 / L is the reciprocal of the span length (L) of the range in relation to the first direction (positive x direction), and the light input portion (13) is a part of the end portion of the range.

The invention relates to the technical field of permanent magnet synchronous motors, in particular to a multi-motor position cooperative control method for a robot, and the method comprises the steps: collecting the state information of multiple motors (taking double motors as an example), and building a discrete prediction model; calculating an unconstrained reference voltage based on model prediction position control; estimating load torque on line by using a Luenberger observer and introducing voltage calculation; performing one-step forward prediction based on the prediction model, and performing delay compensation and linear boundary amplitude limiting processing on the reference voltage; a target function containing a position deviation item is constructed, a deviation compensation item is obtained by solving partial derivative of the target function, and the compensation item is directly coupled to q-axis reference voltage; and finally, the processed voltage is subjected to SVPWM modulation to drive the double motors to operate, and high-precision synchronization and rapid tracking control of the double motors after reference voltage coupling deviation compensation are achieved.

A double servo direct connection driving mechanism of Z axis of numerical control gantry machine tool, it contains a slide, a machining spindle and a driving unit, the slide has a combination board and two combination columns, the combination board and the combination columns form a combination groove together, the machining spindle is vertically placed in the combination groove, the driving unit includes two driving motors and two screw rods, each driving motor is arranged on both sides of the machining spindle and is located on the same axis with the machining spindle, thereby, the driving motor is arranged on both sides of the machining spindle and is located on the same axis with the machining spindle, and the machining feeding efficiency is effectively improved.

The invention discloses an electromagnetic network coupling analysis method and system based on a discontinuous Galerkin technology, and the method employs the network parameter-S parameter of an external circuit to represent a complex circuit network, and achieves the coupling between an electric field and a circuit. A numerical flux suitable for frequency domain field-circuit coupling is derived, and a frequency domain field-circuit joint simulation model is established. According to the method, co-simulation of an electromagnetic field and a circuit system is supported, a field equation and a circuit equation can be directly coupled by enabling a circuit to be equivalent to an S parameter of the circuit, errors caused by traditional step-by-step solving are avoided, and the calculation efficiency is improved while the calculation precision is guaranteed.

A group (140) comprises a first (125), a second (130), and a third device (135) that can be automatically coupled to one another. A method (200) for communicating between devices (125-135) of the group (140) comprises the steps of determining (220) that a direct coupling of the first device (125) to the third device (135) is not possible; determining (225) a second device (120) that is coupled to the first (125) and to the third device (135); and forwarding (235, 240) data between the first (125) and the third device (135) via the second device (130).

In some aspects, the disclosure is directed to methods and systems for an amplifier having common mode feedback inputs. The inputs are coupled to various points within an amplifier wherein a first set of directly coupled common mode feedback inputs join the amplifier one or more nodes, and a second set of capacitively coupled common mode feedback inputs are joined to the amplifier at one or more different nodes.

Implementations of a semiconductor package may include a die; a first pad and a second pad, the first pad and the second pad each including a first layer and a second layer where the second layer may be thicker than the first layer. At least a first conductor may be directly coupled to the second layer of the first pad; at least a second conductor may be directly coupled to the second layer of the second pad; and an organic material may cover at least the first side of the die. The at least first conductor and the at least second conductor extend through openings in the organic material where a spacing between the at least first conductor and the at least second conductor may be wider than a spacing between the second layer of the first pad and the second layer of the second pad.

The invention discloses a submersible motor temperature field joint calculation method based on a finite volume method and an analytical method, and the method builds an efficient coupling temperature field calculation method through building a temperature dependence model of key parameters and integrating the temperature dependence model in fluid-solid coupling calculation. According to the method, through parameterization updating instead of complex multi-physical field direct coupling, the huge calculation burden of a traditional two-way coupling model is avoided while the temperature-loss interaction is accurately reflected, and the balance between the calculation precision and the calculation efficiency is achieved. According to the method, the calculation dimension can be reduced to be extremely low based on the temperature field reduced-order model constructed by the intrinsic orthogonal decomposition. Therefore, when temperature prediction is carried out aiming at different working conditions, a time-consuming full-order model does not need to be repeatedly operated, and only quick calculation needs to be carried out in the low-dimensional subspace, so that quick response to variable working conditions is realized, and the design and analysis efficiency is greatly improved.

This invention belongs to the field of oil and gas pipeline inspection technology, and particularly relates to a wireless passive piezoelectric ultrasonic thickness measurement method and its ultrasonic thickness measurement system. This thickness measurement method, while ensuring relay coupling efficiency, cancels signal crosstalk caused by direct coupling between the excitation coil and the receiving coil through reverse-phase winding of the sub-coil, effectively improving the detection accuracy and result stability of oil and gas pipeline wall thickness. The thickness measurement method includes: determining the structural configuration of the wireless passive piezoelectric ultrasonic thickness measurement system; performing decoupling operations on the excitation coil and the receiving coil; determining the spatial arrangement and magnetic field distribution characteristics of the excitation coil and the receiving coil, and calculating the relay coupling region and structural parameters of the detection coil; determining the coupling parameters of the linear frequency modulated chirp signal used in the excitation process of the excitation coil, and generating the linear frequency modulated chirp signal; receiving the ultrasonic echo signal transmitted back by the detection coil, and performing pulse compression processing on the ultrasonic echo signal.

A permanently installed absence of voltage tester (AVT) may include a connectivity verification system for verifying the connectivity of system cable leads to the main power lines in electrical equipment. An installed AVT may indicate whether the electrical equipment is in an electrically safe state without first requiring direct access to the equipment. One step in the AVT test procedure may include connectivity verification by the connectivity verification system, which may include a sub-procedure to confirm that the installed AVT is directly coupled as intended with direct connection to the equipment being monitored. The connectivity verification system may validate that the AVT is measuring the actual voltage on the power lines of the electrical equipment and has not registered a no-voltage condition due to an unknown disconnection error or installation failure.

The application discloses a current mode receiver and a receiving method, which comprise a low-noise trans-impedance amplifier, a mixer, a current mode low-pass filter and a current mode ADC; the low-noise trans-impedance amplifier converts a radio frequency power signal into a radio frequency current signal; the mixer down-converts the radio frequency current signal into a baseband current signal; the current mode low-pass filter amplifies and filters the baseband current signal and transmits the baseband current signal to the current mode ADC through a current mirror or a direct coupling mode; and the current mode ADC quantizes the baseband current signal and outputs a digital signal. The current mode receiver provided by the application can effectively contain the current mode ADC through a simple interface circuit, can reduce nonlinear conversion from voltage to current and can realize a high-bandwidth, low-power-consumption, simple-structure and high-linearity receiver.

Disclosed are a motor parameter identification method and device, comprising: controlling the motor to operate in a speed closed loop and current closed loop mode according to a reference model of the motor, and obtaining direct-axis voltage, cross-axis voltage, direct-axis current, cross-axis current and motor speed; obtaining direct-axis estimated current and cross-axis estimated current according to an adjustable model of the motor, the direct-axis voltage and the cross-axis voltage; obtaining direct-axis error current according to the direct-axis current and the direct-axis estimated current, and obtaining cross-axis error current according to the cross-axis current and the cross-axis estimated current; adjusting the direct-axis estimated inductance and the cross-axis estimated inductance in the adjustable model through feedback of an adaptive rate model, so that the direct-axis error current and the cross-axis error current converge; the adaptive rate model and the adjustable model adopt a salient pole ratio of the motor. The salient pole ratio of the motor is introduced in the application, the direct-axis inductance parameter and the cross-axis inductance parameter are decoupled and processed, direct coupling of the direct-axis inductance estimated value and the cross-axis inductance estimated value is avoided, and the adaptive rate model is simplified.

The invention discloses an audio simulation method, device and equipment and a storage medium, relates to the field of audio simulation, introduces an agent model based on a multilayer perceptron, and adopts a spherical harmonic function coefficient as a key bridge for connecting a micro sound source and a macro environment. Through offline training, the proxy model learns and solidifies a nonlinear mapping relation from excitation parameters (frequency and voltage) to complex sound field physical representation (spherical harmonic function coefficient). In real-time application, the trained model can instantaneously predict the spherical harmonic function coefficient of the sound source according to the driving parameters, and the spherical harmonic function coefficient is used for subsequent acoustic simulation and finally synthesized into audible audio. Therefore, a time-consuming microscopic physical simulation process is decoupled into offline training, so that a huge calculation gap of source-field direct coupling is bypassed, real-time full-link audio simulation is realized on the premise of ensuring high precision, and the calculation bottleneck is effectively solved.

The present disclosure provides a mode spot converter and a preparation method thereof, which are used for directly coupling an optical fiber and a photoelectric detector chip. The mode spot converter comprises a substrate, a ridge waveguide formed on the substrate, and the ridge waveguide comprises a ridge single-mode waveguide, a tapered ridge waveguide and a widened ridge waveguide connected in sequence along a direction parallel to the surface of the substrate. The widened ridge waveguide is used for connecting an optical fiber and matching the mode field of the optical fiber. The tapered ridge waveguide is used for amplifying and concentrating the mode spot of the light wave output by the optical fiber. The ridge single-mode waveguide is used for coupling the light wave after mode spot conversion to the photoelectric detector chip. The mode spot converter improves the coupling efficiency, accuracy and tolerance, and transmission efficiency, greatly reduces the loss of directly coupling a single-mode optical fiber and a ridge single-mode waveguide, and has high compact integration and low packaging cost.