73 results about "Parallel excitation" patented technology

A scanning sensor system 100, methods and kits for use thereof including a switchable light source 102, a detector 106, a substrate 104 and a plurality of optical sensing sites 112 are provided. Substrate 104 is coupled to and in optical communication with switchable light source 102 and detector 106. Additionally, substrate 104 includes a plurality of substantially parallel excitation waveguides 108, and a plurality of substantially parallel collection waveguides 110, the excitation waveguides 108 and collection waveguides 110 crossing to form a two-dimensional array and optical communication with intersection regions 114 at each crossing. The plurality of optical sensing sites 112 are each in optical communication with an intersection region 114.

A system composed of multiple transmit coils with corresponding RF pulse synthesizers and amplifiers is disclosed. A method of designing RF pulses specific to each transmit coil to dynamically control RF power deposition across an imaging volume is also disclosed, where parallel excitation with the transmit coils allows for management of RF power deposition on a subject while facilitating faithful production of a desired excitation profile. The present invention also supports reduction in scan time and is applicable to any coil array geometry.

A two-rotation two-motion four-freedom-degree parallel excitation platform comprises a movable platform, a fixed platform, four driving branches of the same structure and a middle restraint branch, wherein the four driving branches and the middle restraint branch are used for connecting the two platforms. The four driving branches are respectively of a PSS structure. In each driving branch, a linear module (in an electric driven mode) is fixed to the fixed platform and connected with a sliding block through a sliding pair, one end of a connecting rod is connected with the sliding block through a first ball pair, and the other end of the connecting rod is connected with the movable platform through a second ball pair. The middle restraint branch is of a PPU structure. A guide rail in the middle restraint branch is fixed to the fixed platform, one end of a lower connecting rod is connected with the guide rail through a first sliding pair, the other end of the lower connecting rod is connected with one end of an upper connecting rod through a second sliding pair, and the other end of the upper connecting rod is connected with the movable platform through a universal hinge. The two-rotation two-motion four-freedom-degree parallel excitation platform can achieve the space two-dimensional independent rotational freedom degree and the two-dimensional independent movement freedom degree and has the advantages of being simple and compact in structure, rapid in dynamic response, easy to install and maintain and the like.

The present invention is a apparatus of multi-unit modular stackable switched reluctance motor system with parallely excited low reluctance circumferential magnetic flux loops for high torque density generation. For maximized benefits and advanced motor features, the present invention takes full combined advantages of both SRM architecture and “Axial Flux” architecture by applying “Axial Flux” architecture into SRM design without using any permanent magnet, by modularizing and stacking the “Axial Flux” SRM design for easy configuration and customization to satisfy various drive torque requirements and broad applications, and by incorporating an en energy recovery transformer for minimizing switching circuitry thus further lowering the cost and further increasing the reliability and robustness. Unlike prior arts, the present invention does not use any permanent magnet and this “Axial Flux” SRM system is modularized and stackable with many benefits.

The invention is applied to the fluorescent microscopic imaging, and provides a fluorescent microscopic imaging method and a system thereof. The invention is characterized in that excitation light array points are formed from an excitation light by an optical splitter, an imaging view field of the sample is divided into a plurality of sub-regions by the excitation light array points, multi-line parallel excitation multiphoton fluorescences are formed in a line scanning manner, the fluorescences are separated from each other according to difference wavelengths by a dispersion element, the fluorescent spectrum information is parallel recorded by a detector, and a multiphoton fluorescent microscopic rapid imaging of high spectra resolution on the sample is realized in the full spectrum range.

A system composed of multiple transmit coils with corresponding RF pulse synthesizers and amplifiers is disclosed. A method of designing RF pulses specific to each transmit coil to dynamically control RF power deposition across an imaging volume is also disclosed, where parallel excitation with the transmit coils allows for management of RF power deposition on a subject while facilitating faithful production of a desired excitation profile. The present invention also supports reduction in scan time and is applicable to any coil array geometry.

A scanning sensor system 100, methods and kits for use thereof including a switchable light source 102, a detector 106, a substrate 104 and a plurality of optical sensing sites 112 are provided. Substrate 104 is coupled to and in optical communication with switchable light source 102 and detector 106. Additionally, substrate 104 includes a plurality of substantially parallel excitation waveguides 108, and a plurality of substantially parallel collection waveguides 110, the excitation waveguides 108 and collection waveguides 110 crossing to form a two-dimensional array and optical communication with intersection regions 114 at each crossing. The plurality of optical sensing sites 112 are each in optical communication with an intersection region 114.

The invention provides a flexible and extensible excitation control system. The excitation control system comprises a signal measurement unit, a self-parallel excitation adjustment unit, a limiting unit and an analysis and decision-making unit. The signal measurement unit sends collected operation information of a generator to the self-parallel excitation unit and the limiting unit at the same time, and after being modulated, compared and processed by the self-parallel excitation unit and the limiting unit, the operation information is sent to the analysis and decision-making unit for analysis. The flexible and extensible excitation control system basically integrates the extended functions of excitation control systems of main domestic generator sets and can be used for analyzing stability of the system after actions such as overexcitation, low excitation and stator current limiting of a limiter are conducted.

Under principle of electromagnetic flowmeter of traditional magnetic field excited sensor, the invention adds a controllable electric potential excitation source onto output end of signal from measuring electrode of sensor in parallel. Through relation between parallel excitation and internal resistance of liquid, flow rate of liquid is measured and also internal resistance of liquid is measured as well. Thus, the electromagnetic flowmeter possesses functions for dynamic measuring internal resistance of liquid or conductivity quantificationally.

The invention provides an excitation pulse sequence generator for a magnetic resonance system. An excitation pulse sequence generated by the excitation pulse sequence generator is applied to the magnetic resonance system, so that optimized three-dimensional space selective excitation based on a parallel excitation technology can be realized. By using the excitation pulse sequence generator, an appropriate excitation K space track can be determined in an optimized way according to an excitation target and the space sensitivity situation of a plurality of transmitting channels of a radiofrequency coil, so that a gradient pulse waveform and a radiofrequency pulse envelope waveform corresponding to each transmitting channel are determined. A gradient driving unit and a radiofrequency driving unit of the magnetic resonance system are used for generating gradient pulses and radiofrequency pulses accordingly and driving a gradient coil and the radiofrequency coil to apply the gradient pulsesand the radiofrequency pulses to a scanning space, so that the aim of selectively exciting in a desired three-dimensional space is fulfilled.

The invention provides an IES combined FPGA hardware simulation acceleration system. The system comprises an IES simulation module, a software and hardware communication module and an FPGA hardware acceleration module. The IES simulation module is used for circularly extracting parallel excitation data designed by the tested FPGA within a preset time period according to a preset simulation clock frequency and sending the parallel excitation data to the FPGA hardware acceleration module; Circularly extracting test data of the FPGA design to be tested from the FPGA hardware acceleration module,converting the test data into a simulation result of the FPGA design to be tested according to a corresponding time sequence and displaying the simulation result. The FPGA hardware acceleration moduleis used for receiving the parallel excitation data and storing the parallel excitation data in the input buffer area; generating a test excitation clock and a working clock of each clock domain designed by the tested FPGA, and driving the input buffer area to output parallel excitation data to the tested FPGA design. Under the action of the parallel excitation data, the tested FPGA is designed tooutput test data to the output buffer area. According to the invention, the operation burden of the simulation environment is reduced, and the FPGA simulation speed is improved.

The invention relates to a novel flat single-phase four-pole series motor which comprising a brush assembly, four excitation windings and an armature winding. The brush assembly comprises four sets ofbrush boxes and electric brushes distributed in a surrounding array. The four excitation windings are distributed in a surrounding array and form two N poles and two S poles, the N poles and the S poles are adjacent to each other in pairs, the four excitation windings form two pairs of parallel excitation winding pairs through the four electric brushes, and each of the excitation winding pair hasan N pole and an S pole. The armature winding is connected to the excitation windings in series. According to the novel flat single-phase four-pole series motor of the invention, the torque of a four-pole motor is twice of that of a two-pole motor in an ideal environment, the pairs of poles are formed by the excitation windings, the N poles and the S poles are adjacent to each other in pairs, thesingle-phase four-pole series motor is formed by the connection of the electric brushes and the armature winding, the torque of the motor is greatly improved, and a foundation is laid for the application of the single-phase series motor in the field of a household high-power stirring motor.

The invention provides a parallel type excitation device with current feedback and controllable excitation functions. The parallel type excitation device comprises a regulator and a current transformer. A secondary-side winding of the current transformer is connected with a rectifier bridge, a pin F1 of the regulator is connected with a cathode of a silicon controlled rectifier and a positive end of direct-current output of the rectifier bridge, a pin G of the regulator is connected with a control electrode of the silicon controlled rectifier, a pin N of the regulator is connected with a negative end of the direct-current side output of the rectifier bridge, and a pin V of the regulator is connected with an anode of the silicon controlled rectifier. The parallel type excitation device has the advantages that when the parallel excitation device is used for exciting a power generator, excitation power can be quickly compensated or increased under the condition that an output end of the power generator is in short circuit or terminal voltage of the power generator drops substantially, short-circuit current holding ability is timely provided to the synchronous power generator, a power supply system is selectively protected, the dynamic stability of the power system is guaranteed, and the parallel excitation device is a novel excitation device with high excitation capacity and capability of meeting the requirement on short-circuit current holding ability.

The invention discloses a closed-loop testing system and a closed-loop testing method for an excitation and packet switching system (PSS) control device of a synchronous generator. The closed-loop testing system comprises a real-time simulation work station, a real time digital system (RTDS), an analog output board card, a power amplifier, an excitation and PSS control device and a digital output board card, wherein the real-time simulation work station is connected with the RTDS; the RTDS transmits current and voltage signals to the excitation and PSS control device through the analog output board card and the power amplifier; the RTDS transmits a grid-connected circuit breaker switching signal of the synchronous generator to the excitation and PSS control device through the digital output board card; and the excitation and PSS control device transmits a pulse trigger signal of a six-pulse rectifier bridge to the RTDS through the digital output board card. The self-parallel excitation closed-loop testing system for the excitation and PSS control device of the synchronous generator is flexible in testing and can perform multiple types of tests.

A method for fast-parallel exciting imaging system of electromagnetic chromatography includes storing multigroup excitation matrix information into eight pieces of EEPROM in bit width of eight digits in advance, controlling signal, excitation control circuit and coil array of EEPROM with computer for realizing fast-parallel excitation to increase speed by eight times comparing to individual excitation in sequence. A device of the method is also disclosed.

Under principle of electromagnetic flowmeter of traditional magnetic field excited sensor, the invention adds a controllable electric potential excitation source onto output end of signal from measuring electrode of sensor in parallel. Through relation between parallel excitation and internal resistance of liquid, flow rate of liquid is measured and also internal resistance of liquid is measured as well. Thus, the electromagnetic flowmeter possesses functions for dynamic measuring internal resistance of liquid or conductivity quantificationally.

An MRI apparatus includes a magnetic resonance imaging (MRI) system having a magnet to impress a polarizing magnetic field, a plurality of gradient coils positioned about the bore of the magnet to impose a magnetic field gradient, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF pulses to an RF coil assembly and to acquire MR images, and a computer programmed to apply a plurality of RF pulses configured to control RF excitation by a transmit coil array such that a waveform shape of each of the plurality of RF pulses is based on optimizing a spatial spectrum.

The invention provides a pipeline detection system with functions of multi-frequency switching and multichannel parallel excitation and collection. The system comprises a sensor module, a channel selection switch, a signal processing module, a data storage module, a MCU controller, a frequency generation module and a communication module, wherein the sensor module is connected with the channel selection switch; the channel selection switch is connected with the signal processing module; the signal processing module is connected with the data storage module; the data storage module is connectedwith the MCU controller; the MCU controller is connected with the frequency generator and the communication module; and the communication module is connected with a PC. The pipeline detection systemcan freely select required excitation frequency to adapt to different types of pipelines and defects, has smooth and stable output signals under different frequencies without distortion, supports multichannel parallel excitation and collection along with synchronous performance of excitation and collection and high detection efficiency.

The invention discloses an ultrahigh-voltage phase modifier system applied to an extra-high voltage converter station, and relates to the technical fields of alternating current motors and systems thereof. The ultrahigh-voltage phase modifier system comprises an ultrahigh-voltage phase modifier, a self-parallel excitation static excitation system and a variable-frequency starting system; each stator winding of the ultrahigh-voltage phase modifier is made of cross-linked polyethylene cables, and three-phase stator windings with a symmetric Y-connection method are formed; each phase of winding is equal to each other, and 2M taps are drawn out of the symmetric positions of each winding so as to form M branches, wherein a non-neutral point tap of the branch closest to the neutral point servesas an excitation port, and the other taps serve as power ports, which are connected with a power system, of the stator windings; the power ports of the stator windings are directly connected with an ultra-high-voltage converter station bus through a high-voltage circuit breaker. The phase modifier is directly connected with the converter station bus, a boosting transformer is not needed, the occupied area of the phase modifier system on the extra-high voltage converter station can be remarkably reduced, the cost of the phase modifier system is lowered, and the overall reliability of the phasemodifier system is improved.

An embodiment of the invention discloses an excitation overturn angle determination method of multilayer parallel excitation dispersion imaging and an apparatus thereof. The method comprises the following steps of determining a first area to be imaged and a second area to be imaged, wherein the first area to be imaged and the second area to be imaged possess different longitudinal relaxation time; determining an image contrast function between the first area to be imaged and the second area to be imaged when the multilayer parallel excitation dispersion imaging is executed; and based on the image contrast function, determining an excitation overturn angle of a dispersion weight sequence. In the embodiment of the invention, when the multilayer parallel excitation dispersion imaging is executed, an imaging organization contrast which is the same with or is similar to single-layer excitation dispersion imaging can be acquired.

The invention relates to a space-coding parallel excitation system and method, which is characterized by including a parallel excitation array formed by a plurality of single-point excitation light sources and a space coding control system which includes a microcontroller, a drive module, a switch control module, an output light power control module and an excitation time control module; wherein the switch control module controls on or off of the single-point excitation light sources; the output light power control module controls the output light power of the single-point excitation light sources; the excitation time control module controls the work time of the single-point excitation light sources; the switch control module, the output light power control module and the excitation time control module set parameters of the microcontroller; and accordingly the space coding control system performs space coding to the parallel excitation array accoding to parameter setting of the microcontroller and through work state setting of the single-point excitation light sources in the parallel excitation array by the drive module. The invention has advantages of flexibility, high efficiency, convenient use, high imaging time and spatial resolution and wide application range.

The invention provides a missile full-missile double-platform parallel excitation reliability test method and system based on comprehensive stress. The method comprises the steps that a tested comprehensive stress environment profile is determined according to analysis of a mission profile during the use process of a missile, a random vibration scheme of double vibration platforms is determined according to the environment profile, the uniform distribution of vibration input magnitude is guaranteed, a reliability test of a full-missile-grade product is carried out by selecting and using a 20-1scheme in a short time high-risk scheme in GJB 899A, the comprehensive stress is used as the accelerated test stress of the full-missile-grade, and the reliability of the full missile is investigatedthrough double-platform parallel excitation control. According to the method and the system, under the comprehensive stress, a double-platform parallel excitation scheme is simultaneously selected, the full-missile-grade product is selected for testing, and the problems that the full-missile-grade product is difficult to really simulate the environment and the reliability of the full-missile-grade product is difficult to check are solved.

The invention relates to a wall fan gear automatic switching mechanism which comprises an alternating-current and direct-current dual-purpose motor arranged in a control box of a wall fan and used forproviding power for driving of the wall fan, and the alternating-current and direct-current dual-purpose motor is a series excitation type motor or a parallel excitation type motor. The DDR storage device is arranged in a control box of the wall fan and used for storing a personnel gear table, and the personnel gear table takes the personnel number as an index and stores the mapping relation between the personnel number corresponding to the common personnel using the wall fan and the corresponding conventional gear; the feature recognition equipment is used for analyzing the facial features in the target pattern, and determining a corresponding personnel number based on the obtained facial features to serve as a reference personnel number to be output; and the gear selection equipment isused for searching the conventional gear corresponding to the reference personnel number in the personnel gear table and switching the current gear of the wall fan based on the conventional gear. According to the invention, the current gear of the wall fan equipment can be flexibly controlled.

The invention provides a biaxial inertia excitation tamping pick, and relates to railway maintenance equipment, in particular to the biaxial inertia excitation tamping pick with the advantages that directional vibration force is provided, and the vibration effect is good. The biaxial inertia excitation tamping pick uses a gasoline engine or a diesel engine as prime power. The biaxial inertia excitation tamping pick is characterized in that the tamping pick comprises a tamping handle, a tamping case, a vibration reduction tube, a transmission device and an excitation vibration component, wherein the vibration reduction tube is fixed on the top of the tamping case; the tamping handle is arranged on the vibration reduction tube; the excitation vibration component is arranged inside the tamping case, and is connected with the prime power through the transmission device. Through two parallel excitation vibration shafts and two groups of eccentric blocks in opposite arrangement on the excitation vibration shafts, the two groups of eccentric blocks enable vibration excitation forces at the left side and the right side of the tamping pick to mutually counteract and to be converted into vibration excitation force in a front and back direction; the tamping efficiency is improved; meanwhile, a flow guide plate is added; the flow guide plate is used for decomposing the front and back force into forward force and downward force, so that a pick head can automatically move forwards; front ballast is pushed and naturally flows to the bottom of a sleeper; the special requirements of railway construction are met.

The invention discloses a series-parallel excitation device for a vibrating table. The series-parallel excitation device comprises a power supply and an excitation coil. The power supply has a power supply positive electrode and a power supply negative electrode. The excitation coil is formed by a plurality of windings that are arranged successively along a longitudinal direction; the windings are classified into at least two winding assemblies that are connected in parallel between the power supply positive electrode and the power supply negative electrode of the power supply; and each winding assembly consists of a winding or at least two windings connected in series. The series power supply between the laminated windings of the excitation coil is changed into a series-parallel power supply way; and thus the excitation coil is divided into an upper layer and a lower layer, the laminated windings at the upper layer and the lower layer are connected in series and then are connected in parallel. On the basis of the first-series second-parallel connecting way, the voltage value of the input terminal of the excitation winding is reduced, the electrochemical corrosion speed is reduced effectively, and reliability of the vibrating table is guaranteed.

The invention discloses a horizontal excitation test device, a combination thereof and an installation method of the device. The horizontal excitation test device comprises a vibration exciter fixed on the ground, a decoupling mechanism is arranged on the vibration exciter, a hoop device is arranged on the decoupling mechanism, the vibration exciter transmits power to the hoop device, a hanging device is arranged on the hoop device, the hoop device is hung by the hanging device, a lifting supporting device is arranged below the hoop device, and the hoop device is supported by the lifting supporting device. Synchronous or asynchronous parallel excitation of the vibration exciter on the test piece is realized by adopting the decoupling mechanism; the hanging mechanism is arranged to hang the clamping mechanism so as to balance the gravity of the test piece; a plurality of vibration exciters are arranged, so that the horizontal multipoint synchronous or asynchronous vibration test of a long test piece can be completed, the eccentric moment resistance is very large, and the horizontal parallel excitation test of large size, large mass and large scale can be met.

The present invention relates to a converter system of a switched reluctance generator, which is composed of a storage battery, twenty-two diodes, a three-phase winding, seven switching tubes, twelvecapacitors, two inductors and a bidirectional isolation converter. Under a converting structure comprised of the converter system, the enhanced excitation capability is realized by the automatic parallel excitation of two branch windings of each phase winding; the full-series high step-up output is realized by the automatic series generation of two branch windings of each phase winding in combination with the storage battery and related capacitors. Only one switching tube is needed in the process. An extremely high voltage can be directly output with the least switching tube; the storage battery can be charged automatically and the reverse energy feeding can be also realized in the same set of converting circuit; the level of intelligence is improved; and the demands that the system can still meet the requirement when more electric energy is needed on the load side of the output terminal of the converter system are adapted. The maximum withstand voltage of each switching tube in the whole system is low; the switching loss is low; and the switching tube is suitable for the application in the converter system of the switched reluctance generator under various power inputs and parallel connection or direct loads.

The present invention relates to a permanent magnet control mechanism for middle and high-pressure switch device. An anti-symmetric shunt excitation type bistable permanent magnet control mechanism, whose outer magnet yoke is a hollow cylinder, the outer magnet yoke is clipped by an end cap of an off-breaker and an end cap of a on- breaker, the moving iron-core is arranged at the center of the cylindrical magnet yoke, the moving iron-core center is fixed with a capability lever; the static iron-core is consist of first static iron-core and second static iron-core, the division brake coil, the first static iron-core, the on-brake coil, the second static iron-core and the permanent magnet are installed in sequence between the static iron-core and the moving iron-core from the division brake end cap to the on-brake end cap between the hollow cylinder magnet yoke and the moving iron-core, and the permanent magnet is placed at the first static iron-core, the on-brake coil and inside of the second static iron-core. The present invention with good output characteristic can improve division brake velocity effectively, and reduce the exciting current of on-off brake, and reduce the touching time of the moving iron-core, and overcomes the defect such as the slow on-off brake velocity of the existing mechanism, big power consumption etc, and is good for miniaturization of the mechanism.

The invention discloses a multi-vibrating stand parallel-excitation movement synchronization debugging method. The method includes the following steps: determining a multi-stand parallel-excitation synchronization debugging target, preparing the wire connection of a test device, initiating the test device, setting parameters of a vibrating control system, measuring the current information of a vacuum stand test, synchronously adjusting the movement amplitude of multiple stands, synchronously adjusting the movement phase of multiple stands, testing expansion stand with loads, and turning off the test device. According to the invention, the method herein aims at ensuring synchronization of multi-stand movement by adjusting power amplification gain and phase compensation. The method herein can prevent multiple vibrating stands from outputting phase reversal and from causing damage to the test device and test products, and can ensure safe and effective operation of the multi-vibrating stand parallel-excitation test system.