25 results about "Digital switching" patented technology

The invention provides an active-disturbance-rejection control method for an electromagnetic bearing two-level digital switching power amplifier embedded with model information. The method comprises the steps that an electromagnetic bearing two-level digital switching power amplifier mathematical model suitable for controller design is established based on the Fourier series theory and coil current characteristics; a direct current component in the mathematical model is defined as a modeling disturbance term, and feedforward compensation is directly carried out in the control law; parameter perturbation and an unmodeled part in the mathematical model are defined as unknown perturbation items, and real-time estimation is carried out through an extended state observer; a current item and a control input item in the mathematical model are used as known model information to be embedded into the design of the extended state observer; designing a feedback control law to carry out real-time compensation on the current item, the modeling disturbance item and the unknown disturbance item; a zero-order retainer and a current observer are adopted to carry out discretization processing on the controller, and the discretization processing is realized on a digital control platform based on a DSP (Digital Signal Processor). The method is high in current response speed and high in control precision.

The utility model discloses a kind of selectable valve core reset device, access oil pressure control system and emergency shutdown valve hydraulic control system, and is equipped with three oil paths: the first two access oil tank of oil pressure control system, the third access its oil pressure accumulator, dry road is equipped with electric valve and has multiple branch lines afterwards.Device contains switch control valve, auxiliary booster mechanism, hydraulic feedback mechanism, double filter, digital valve, proportional valve, proportional digital switching valve, auxiliary switching valve, two hydraulic control reversing valves and two travel switches, etc., and is connected into complete control and execution system by pipeline.It can be switched digital valve and proportional valve control mode by proportional digital switching valve, adapt to different working conditions;With hydraulic control reversing valve and travel switch cooperation, realize oil path accurate control and valve core reset monitoring feedback, improve accuracy;It is also equipped with main matching position sensor, manual valve etc., enhance system stability and controllability, can guarantee valve core reset reliable under complex working condition, improve oil pressure pump oil conveying system overall efficiency and reliability.

The utility model discloses a display device 1 loudspeaker sound source state detection device based on vibration, a display device is provided with at least two loudspeakers, the detection device comprises a vibration sensor and a test mainboard, the test mainboard is provided with a microcontroller and a switching value conversion circuit, and the microcontroller is respectively connected with the vibration sensor and the switching value conversion circuit; a vibration sensor is correspondingly installed at the position of each loudspeaker, the vibration sensors detect the vibration states of the loudspeakers so as to output vibration electric signals, the vibration sensors are connected with the microcontroller through a switching value conversion circuit, and the switching value conversion circuit is used for converting the vibration electric signals into digital switching values; and the microcontroller acquires digital switching values through the switching value conversion circuit and gathers and processes the digital switching values to form vibration state data of the loudspeaker sound source. According to the utility model, the detection device detects and identifies the silent / voiced output state of the loudspeaker audio left / right sound channel through the vibration sensor, thereby improving the cost performance of the product.

A power supply system includes an MPU, multiple power conversion circuits, and multiple extended-control circuits. The MPU supplies a digital switching driving signal to the power conversion circuit, and supplies a digital switching driving signal to the power conversion circuit. The extended-control circuit, which includes a CR circuit, generates a switching driving signal which is delayed with respect to the digital switching driving signal, and supplies the switching driving signal to the power conversion circuit. The extended-control circuit, which includes a CR circuit, generates a switching driving signal which is delayed with respect to the digital switching driving signal, and supplies the switching driving signal to the power conversion circuit.

The present invention belongs to the field of power electronics and integrated circuits, and specifically provides a new gate voltage bootstrap switch sampling circuit to solve the problem that the traditional gate voltage bootstrap switch sampling circuit cannot start up too quickly due to the overly complex working path. The present invention includes a bootstrap circuit, a holding circuit and a sampling tube. The bootstrap circuit includes a bootstrap capacitor and a digital switching circuit; the bootstrap capacitor is used to obtain a signal source according to the digital switching circuit and output a bootstrap voltage to the gate of the sampling tube according to the signal source; the holding circuit is used to control the charging of the bootstrap capacitor and the reset of the sampling tube gate potential according to two opposite clock signals; the digital switching circuit is used to control the discharge of the bootstrap capacitor C1 according to two opposite clock signals, and control the holding circuit to control the gate voltage of the sampling tube. The present invention can complete the gate voltage boosting work of the switching tube through fewer component loops, effectively reducing the working time of the gate voltage bootstrap switch sampling circuit.

Clock enable signals are collected and summed. The number of simultaneously enabled clock enable signals can represent switching activity within a system and can be used as an indicator for power management, noise management, etc. of such a system. Digital switching activity sensing include performance of an operation to sum a quantity of open clock gates associated with a plurality of latches that are grouped into multiple subsets of latches. An activity indication is generated based, at least in part, on a result of the operation to sum the quantity of open clock gates associated with the plurality of latches.

The application discloses a kind of mixed radio frequency receiver group time delay test platform and method, including first, second vector signal source, first, second power divider, excitation signal generator, combiner, mixed radio frequency receiver of analog-digital, digital switching board, logic analyzer;First vector signal source simultaneously provides for second vector signal source and mixed radio frequency receiver reference clock, and second vector signal source generates OFDM modulated signal, and excitation signal is sent to logic analyzer by one end of second power divider, and triggers logic analyzer to prepare to accept test signal, and excitation signal is sent to second vector signal source by the other end of second power divider, and is superimposed to radio frequency receiver by combiner with OFDM modulated signal, and is accessed to logic analyzer by digital switching board.It is demodulated I / Q data information of test signal after logic analyzer receives excitation signal again, and calculates group time delay result.The application solves the problem of accurate measurement of group time delay of mixed radio frequency receiver of analog-digital.

The invention discloses an anti-saturation optical detection circuit, and relates to the technical field of electronic circuits. The circuit comprises a photoelectric conversion unit, a voltage comparison unit, an adjustable reference voltage unit and an output unit. By setting the adjustable threshold voltage, the circuit can effectively distinguish the effective shading signal from the ambient background light, the saturation phenomenon under the strong ambient light is avoided, and a higher reference voltage is set through the adjustable potentiometer. Only when a shielding object enables the phototube to output a strong signal exceeding the threshold value, the comparator turns over, so that tiny voltage fluctuation caused by electromagnetic interference is ignored. According to the utility model, stable and clean digital switching signals are output, and the reliability and the anti-interference capability of optical detection are obviously improved.

The utility model relates to the technical field of charging power supplies, in particular to a digital switching power supply for a control loop. The digital switching power supply comprises a power module which is used for adaptively outputting an adjustable voltage according to a load; the voltage detection module is connected with the power module and is used for detecting the voltage of the power module; the current detection module is connected with the power module and is used for carrying out current detection on the power module; and the control module is respectively connected with the power module, the voltage detection module and the current detection module and is used for controlling the power module to output corresponding voltage based on an input instruction, and the problem that a digital power supply in the prior art cannot simultaneously realize voltage boosting and voltage reducing functions is solved.

A transmitter equalization circuit based on analog modulation includes: a pair of pulse-width variable 1UI pulse generators and their serializers, a dynamic buffer, a pre-drive buffer, and a tailless current-mode driver. The first and second pulse-width variable 1UI pulse generators serialize four parallel FFE data streams and four parallel main data streams into one time-interleaved 1UI pulse data stream. The pre-drive buffer amplifies the serial main data to full swing and outputs it as a digital switching level to the switching transistor of the tailless current-mode driver. The dynamic buffer performs level shifting on the serial FFE data and outputs it to the current source transistor bias of the tailless current-mode driver. This invention can reduce the additional parasitic capacitance caused by the slicing of the auxiliary equalization driver, reduce the area and power consumption of the pre-driver and related circuits, and significantly reduce the glitches in the continuous output level of the pre-stage 4:1 serialization circuit.

The application relates to a digital switch quantity detection device of an inertial measurement system and a method thereof, which is composed of a monitoring control display module, a configuration file module, a switch quantity analysis and combination module and a bottom layer hardware communication module. When the configuration file is loaded into the memory, switch quantity information objects are automatically generated, the switch quantity information objects are stored in a linked list and managed in the linked list mode, and each object is mapped with the linked list through a unique index number. The monitoring control display module is dynamically generated according to the configuration file. In the test process, the switch quantity analysis and combination module converts the switch quantity information in the configuration file into information that can be displayed by the monitoring control display module, converts the control operation information of the monitoring control display module into information that can be recognized by the bottom layer hardware communication module, and feeds back the switch quantity information read by the bottom layer hardware communication module to the monitoring control display module after judgment and confirmation, so that the interface display is updated. The application can quickly and efficiently construct a test scheme of the inertial measurement system.

This disclosure relates to a computing unit including a pair of asymmetric ferroelectric devices and a method for forming the same. A ferroelectric computing unit includes: a first ferroelectric switching device including a first ferroelectric material portion and generating a digital output signal; and a second ferroelectric switching device including a second ferroelectric material portion and generating an analog output signal. The output node of one of the first and second ferroelectric switching devices is electrically connected to the gate electrode of the other to provide mixed-response characteristics of random digital switching and analog switching.

The invention provides a multi-purpose electrical practical training method and device based on a PLC, and the method comprises the steps: constructing a hardware architecture integrated with multi-specification PLCs, and selecting different types of PLCs to adapt to diversified practical training demands from simple control to complex system protection; a digital quantity signal processing module and an analog quantity signal processing module are configured to realize bidirectional interaction of digital switch signals and analog operation parameters, and a signal interaction network of a real industrial scene is constructed; a man-machine interaction interface is designed, two functional modules of system simulation and a practical training platform are integrated through a touch screen panel, and parameter setting, state display and control logic simulation operation are supported; a modular software architecture is established, generator-transformer group protection, line protection, bus protection and control system simulation sub-modules are deployed in a unified manner, and a standardized hardware interface and a software expansion space are reserved to support function iteration.

The present application belongs to the technical field of generator equipment monitoring, and particularly relates to a method for preventing the sparking of a generator excitation brush. First, a monitoring module is arranged at the rotor excitation brush of the generator to obtain a digital switching signal and an analog signal of sparking frequency when the brush sparks. After the digital switching signal and the analog signal are preprocessed, it is determined whether the signal threshold is exceeded. If so, a de-excitation signal is generated. According to the de-excitation signal result, a solution is matched and pushed to the user. The present application can solve the problem of poor monitoring effect of the generator excitation system in the prior art.

Systems and methods for controlling the X-ray dosage by controlling anode current in the time domain are disclosed. In one of the aspects, a digitally switching X-ray emission system includes a digital switching unit operable to selectively connect a low voltage driving circuit to activate a field emission type electron emitting construct such that electrons are accelerated by a high gate voltage towards an anode target thereby generating a pulse of X-rays. The gate voltage is increased until a desired anode current is reached and PWM is used to slice the gate voltage in the time domain. The X-ray dose is controlled by slicing the anode current in time using PWM gate voltage.

Embodiments here broadly relate to a system which allows for flexibly, and adaptively, accommodating for various analog and digital streams. In one example case, the system can accommodate for the use of both legacy modems as well as newer digital modems. The system may not require the use of complex and expensive, very high data rate and / or very high throughput wideband digital switches in some architectures, as well as potentially eliminating the need for some additional processing equipment found in traditional architectures (i.e., wideband signal processors (WSP), legacy modem data converts (LDMCs), etc.).

The invention discloses a satellite-borne multi-scale hybrid broadband switching system and method, and the system comprises a satellite-borne microwave photon transparent transponder which is used for receiving a radio frequency ultra-wideband signal of a first bandwidth scale, and completing the satellite-borne communication switching of the first bandwidth scale; the satellite-borne optical domain channelization switch is used for receiving the first bandwidth scale ultra-wideband mixing optical signal of the satellite-borne microwave photon transparent transponder and completing second bandwidth scale satellite-borne communication switching; the satellite-borne digital switch is used for receiving a second bandwidth scale broadband communication signal of the satellite-borne optical domain channelized switch and completing third bandwidth scale or data packet scale satellite-borne communication switching; and the satellite-borne comprehensive management and control machine is used for receiving the signaling channel data of the satellite-borne digital switch, completing instruction analysis and distribution, and managing and controlling the satellite-borne communication exchange. According to the invention, the utilization efficiency of the on-satellite spectrum and power is improved, a satellite communication system can be supported, and the capabilities of large port bandwidth, high communication capacity, fine exchange scale, flexibility and controllability, multi-satellite networking and the like can be realized at the same time.

The invention relates to the technical field of analog signal processing and optical communication, and provides a switching type laser driving circuit and a driving method. The driving circuit comprises a signal conversion module, a control module, a driving module, a switch module, a current control module and a current mirror module, the signal conversion module is used for converting an input CML differential signal into a digital switch signal; the control module is connected with the signal conversion module and is used for performing phase conversion and enabling control on the digital switch signal; the driving module is connected with the control module, and the driving module is composed of multiple stages of digital phase inverters and used for improving the signal fan-out capability; the switch module is connected with the driving module and is used for receiving the driving signal and controlling the conduction state of the current mirror module; the current control module is used for accessing a reference current and controlling the magnitude of the output current of the current mirror module; and the current mirror module is respectively connected with the switch module and the current control module, and is used for outputting modulation current to drive an external laser assembly and outputting monitoring current.

The invention belongs to the technical field of electric power automation, and particularly relates to an industrial electric equipment power failure fault reporting device and system. The device comprises an internal power supply module, a voltage monitoring module, a controller module, a 485 communication module, a LoRa communication module and a standby power supply module. According to the invention, two analog quantities of an alternating voltage and a direct-current power supply voltage of the device are simultaneously converted into digital switching values, logic processing is carried out, fault discrimination is carried out, and the accuracy of fault information is improved; and meanwhile, after the fault equipment is found, the fault equipment is isolated in time, so that the overall operation efficiency of the system is improved, and the problem of conflict of reported messages when multiple pieces of equipment fail at the same time is effectively solved.

The utility model relates to the technical field of BTB pressing machines, and discloses a novel BTB pressing machine control system. The novel BTB pressing machine control system comprises an MCU module 1 used for processing digital quantity input detection, digital quantity output control, analog quantity acquisition, a pressure detection algorithm and serial port communication; the digital quantity input module 2 is used for externally connecting digital switching value input peripheral equipment, such as a sensor and a button; the digital quantity output module 3 is used for being externally connected with digital switching quantity output peripheral equipment, such as a relay and an air cylinder; compared with the prior art, the utility model has the advantages that the wiring is more convenient and simpler, and the equipment cost, the equipment volume and the equipment maintenance difficulty can be greatly reduced especially in an application scene in which multi-path BTB pressure acquisition needs to be realized.

The invention provides an active-disturbance-rejection control method for an electromagnetic bearing two-level digital switch power amplifier embedded with model information so as to improve the response speed and precision of a current inner ring. Firstly, based on the Fourier series theory and coil current characteristics, a mathematical model suitable for controller design is established. Secondly, performing modelable disturbance term feed-forward compensation on a direct current component in the model; parameter perturbation and an unmodeled part are used as unknown disturbance terms, and an extended state observer is used for real-time estimation. Meanwhile, known information such as a current item is embedded into an observer, and a feedback control law is designed to compensate various items in real time. And finally, discretizing a controller by using a zero-order retainer and a current observer, and implementing on a DSP (Digital Signal Processor) digital control platform. The control performance is excellent, compared with PI and active-disturbance-rejection control, the current response is faster, the precision is higher, and the method is of great significance to stable operation of the magnetic suspension rotor.

The utility model relates to the technical field of power supply power amplifiers, in particular to a high-efficiency digital switching power supply power amplifier, which comprises a high-efficiency digital switching power supply power amplifier body. The high-efficiency digital switching power supply power amplifier body comprises a chassis bottom plate, a mainboard, a chassis rear plate, an output plate, an auxiliary panel, a side plate, a chassis top cover, an automatic controller I, an automatic controller II, a fan, a power switch, a relieved tooth radiator, an overcurrent protector and a fan bracket. According to the utility model, the shovel tooth radiator is arranged on the rear side of the mainboard, the rectangular heat dissipation net is arranged on the case rear plate, the fan is arranged on the inner side of the rectangular heat dissipation net, the large heat dissipation net is arranged on the auxiliary panel, and the fan frame and the fan are arranged on the rear side of the large heat dissipation net. Heat in the efficiency digital switching power supply power amplifier body can be fully discharged to the outside more efficiently, a plurality of fans are arranged, so that the wind power coverage range is wider, and the equipment maintenance cost and the system fault risk are reduced.

The utility model relates to the technical field of digital power supply control, in particular to a slope compensation circuit. The main control unit is connected with the MCU and the DCDC power supply; comprising a power supply unit, a first slope compensation unit, a second slope compensation unit, an input interface A and an output interface B, a first external slope compensation unit and a second external slope compensation unit are added during current mode control of the digital switching power supply, so that control can be better realized, subharmonic oscillation is avoided, and external slope compensation is more stable and higher in linearity than internal slope compensation; and more flexible slope compensation is realized through matching with a driving signal given by the MCU unit.

The application discloses a kind of spaceborne multiscale hybrid broadband switching system and method, the system includes: spaceborne microwave photon transparent transponder is used to undertake the radio frequency ultra-wideband signal of first bandwidth scale, completes first bandwidth scale spaceborne communication switching;Spaceborne optical domain channelization switch is used to undertake the first bandwidth scale ultra-wideband mixed light signal of spaceborne microwave photon transparent transponder, completes second bandwidth scale spaceborne communication switching;Spaceborne digital switch is used to undertake the second bandwidth scale broadband communication signal of spaceborne optical domain channelization switch, completes third bandwidth scale or packet scale spaceborne communication switching;Spaceborne integrated management and control machine is used to receive the signaling channel data of spaceborne digital switch, completes instruction analysis and distribution, for spaceborne communication switching control.The application improves the utilization efficiency of on-board spectrum and power, can support satellite communication system to realize large port bandwidth, high communication capacity, fine switching scale, flexible controllable, multi-star networking and other capabilities simultaneously.

An embodiment system includes a digital switching fabric system forming a digital backbone network, and one or more first system components including first computer program code that causes the respective first system component to perform communication of data with one or more second system components over a virtual link through the digital backbone network. Communication of data is performed using a standardized serialization protocol and according to a transport mechanism. The respective first system component implements an end point infrastructure services (EPIS) stack providing endpoint data distribution services. The digital backbone network provides network connectivity the first system components and the one or more second system components according by limiting the communication to connectionless communication using transport mechanisms associated with the first system components. Each of the transport mechanisms is one of a time aware transport service, rate constrained transport service, or best effort transport service.