94 results about "Digital signal controller" patented technology

The invention discloses a singlechip-based induction motor variable frequency speed regulation control system. The system comprises a main circuit, an auxiliary power circuit, an inverter circuit, a control part, an over-current protection circuit, a rotation speed detection circuit and other peripheral circuits. A 16-bit high-performance signal controller dsPIC30F4011 which is produced by the Microchip Company is used as a control core by the system to perform speed regulation based on vector control motor excitation. A digital signal controller dsPIC30F4011 of the America Microchip Technology Company is used as a chip special for motor control, a digital signal processor (DSP) inner core is embedded, and the chip has quick data processing capacity and is provided with abundant input and output equipment and interface circuits; an intelligent power module (IPM) IRAMSIOUP 60A of the IR Company is an inverter switching device, so that the variable frequency speed regulation control system of an asynchronous motor is constructed; and the system has the characteristics that the system is simple to drive and easy to realize.

A new apparatus of pure digital medical amplifier used for clinical and non-clinical biomedical signal acquisition purposes is disclosed, which include: multiple single-stage amplification buffers connected to biomedical signal inputs for receiving and buffering various biomedical and reference signals, one or more high resolution analog-to-digital converter whose analog inputs connected to the output of said buffers for digitizing biomedical signals, one or more digital signal controller whose inputs/outputs are connected to said buffers and analog-to-digital converters for receiving the digitized biomedical signal data and controlling the processing and output of said digitized biomedical signal data according to preset control program or user's commands. By real-time or non-real-time method said digital signal controller does the following signal processing on the digitized biomedical signal data: filtering, compressing, decompressing, encoding, decoding, transferring, storing and retrieving, analyzing, and displaying the required said digitized biomedical signal data. This invention of amplifier requires only a few electronic components, and yields extremely low internal noise, extremely low distortion of analog output, extremely high external noise rejection and immunity, extremely high flexibility in filtering frequency setting for various biomedical signals.

The invention discloses a bidirectional DC-DC converter circuit control system and a hybrid power motor vehicle. The bidirectional DC-DC converter circuit control system comprises a bidirectional DC-DC converter, a driving circuit, a sampling circuit, a digital signal controller and a CAN transceiver. The bidirectional DC-DC converter is in signal connection with the driving circuit and the sampling circuit, the driving circuit, the sampling circuit and the CAN transceiver are all in signal connection with the digital signal controller, and the CAN transceiver is connected with a CAN bus. The topological structure of the bidirectional DC-DC converter comprises a high-voltage end and a low-voltage end, the sampling circuit samples current and / or voltage values of the high-voltage end and current and / or voltage values of the low-voltage end, the digital signal controller processes the sampling values and carries out PWM control on the bidirectional DC-DC converter through the driving circuit. Digital control is carried out through sampling of the digital signal controller, the problem of analog control of temperature excursion and the problem of component aging are avoided, design cost of the system is reduced, and compared with analog control, the bidirectional DC-DC converter circuit control system has better compatibility, flexibility and expansibility.

The invention discloses a system and method for high-voltage direct-current starting and power generation of a stator duplex winding asynchronous motor. A main loop comprises the stator duplex winding asynchronous motor, a rectifier bridge, a power converter, a direct-current power source, a diode, a control side direct-current capacitor and a power side direct-current capacitor. A detecting loop comprises a first voltage transducer, a second voltage transducer, a first current transducer and a second current transducer. A control loop comprises a digital signal processor and a driving circuit. Five-phase centralized full-pitch star-shaped structures are adopted by both sets of stator windings which are a power winding and a control winding of the stator duplex winding asynchronous motor. In the starting and power generating process, the power converter implants three times of proper harmonic currents to the motor through the control winding under the control of the digital signal controller, an air-gap magnetic field is controlled to be a standard square wave, and therefore the torque density and the power density of the motor are improved. The system and method for the high-voltage direct-current starting and power generation of the stator duplex winding asynchronous motor is simple in structure and free of electric brush sliding rings, can achieve the integration of start and power generation, and has the advantages of being high in power density and torque density, easy to operate with fault-tolerance and the like.

The invention discloses a multifunctional construction safety monitor, which is characterized in that the monitor is composed of a dust sensor, a combustible gas sensor, a carbon dioxide CO2 sensor, anear electrical distance sensor, a temperature sensor, a display screen, a DSC digital signal controller, a GPRS/Lora wireless module and a voice module connected by an MCU; the DSC digital signal controller is connected with a smart helmet/3D spatial positioning tracking wireless communication module, an acceleration sensor and a gyroscope; the MCU sends monitor data by the GPRS/Lora wireless module to a cloud monitoring system platform through the Internet of Things. Compared with the prior art, the monitor has the advantages of simple structure and small volume, is convenient for on-site construction personnel to carry around, and can timely and accurately monitor the working environment of the construction personnel to perform corresponding alarms, thereby effectively preventing or reducing the damage of the safety hazards existing on the construction site to the on-site construction personnel.

The invention relates to an inverted arc welding machine and particularly relates to a digitally-controlled multifunctional inverted arc welding machine which has high working efficiency and fast dynamic response. The digitally-controlled multifunctional inverted arc welding machine comprises a main circuit system (1) of an IGBT (Insulated Gate Bipolar Translator) inverting circuit (101), a digital control system (2) and a man-machine switching system (3), wherein the digital control system (2) adopts a digital signal controller (4) as a core control unit and further comprises an auxiliary circuit (5) connected with the digital signal controller (4), a signal conditioning circuit (6) for processing collected data of the main circuit system (1), and an IGBT driving circuit (7) for carrying out driving control on the IGBT inverting circuit (101); the type of the digital signal controller (4) is dsPIC30F4011 and the digital signal controller (4) is connected with the IGBT inverting circuit (101) through the IGBT driving circuit (7); and the digital signal controller (4) is used for adjusting and controlling the main circuit system (1).

The invention discloses a vehicle-interior masking sound quality self-adaption control system and method in order to solve the problems that existing vehicle-interior sound quality control mostly stays on the fundamental research level and cannot be actually applied. The self-adaption control system comprises a masking sound quality self-adaption control device, a vehicle-interior sound signal collecting device, an engine rotating speed signal collecting device, a loudspeaker combination/array device and a masking sound spectrum storing device, and the masking sound quality self-adaption control device is composed of a digital signal controller chip with the model being TMS320F28335, a sound frequency control chip with the model being TLV320AIC23, a sound power amplifier and a CAN bus transceiver with the model being SN65HVD230. The vehicle-interior sound signal collecting device, the engine rotating speed signal collecting device, the loudspeaker combination/array device and the masking sound spectrum storing device are electrically connected with the masking sound quality self-adaption control device.

The invention discloses a system and method for monitoring the ring main unit cable joint temperature. The system comprises a ring main unit which comprises a cable chamber, a switch chamber, a secondary wiring chamber, a PT cabinet chamber, a network distributing automation chamber, a ring main unit power distribution terminal, a temperature monitoring terminal and a temperature sensor. In the temperature monitoring process, the environment temperature inside the ring main unit and the temperature of a cable joint inside the ring main unit are respectively measured in real time and are transmitted to a digital signal processor inside the temperature monitoring terminal, the actual temperature rising rate of the cable joint is obtained by carrying out compensation and verification on data, and the actual temperature rising rate is compared with the pre-set actual temperature rising rate threshold value of the cable joint. When the actual temperature rising rate of the cable joint exceeds the threshold value, a digital signal controller produces an alerting signal and enables an alarming module to be started to give an alarm, the data and the state are sent to a long-distance master station, workers of the long-distance master station can respond to fire and other dangerous incidents inside the main ring unit fast, and losses are reduced.

A digital inverter-type square-wave alternating argon arc welding machine with excellent reliability, uniformity and stability consists of a power system and a control system, the power system consists of a primary wave filtering rectifier, a primary inverter, a main transformer, a secondary wave filtering rectifier, a secondary inverter and an output loop and responds to a control signal to convert grid high-voltage forward-spinning AC into low-voltage square-wave AC and complete the conversion from electric energy to heat energy through a welding circuit; the control system consists of a core function unit and a human-machine interaction interface and is characterized in that the core function unit is a digital signal controller (DSC) or a digital signal processor (DSP).

The invention relates to a brush electronic fan drive protection system and a self-diagnosis method. The brush electronic fan drive protection system is composed of a control chip, a signal drive module, a drive module, a brush electronic fan, a voltage monitoring module, an A/D collection module and a digital signal controller. The functions of power-on self-inspection for a system, real-time state detection, self-diagnosis for faults and classification and display for faults can be achieved, the fan is automatically driven to run at variable speed by a set program, the voltage monitoring module can achieve on-off control over the brush electronic fan, adjustment of running speed, open circuit and short circuit protection for the fan, and achieve various protection in cooperation with the program.

The invention relates to a single-pole electromagnetic switches based phase split control system of an alternating current contactor. The phase split control system comprises a three-phase alternating current contactor, wherein the three-phase alternating current contactor is formed by combining three single-pole electromagnetic switches matched with an intelligent control module, and the intelligent control module comprises a control core digital signal controller (dsPIC) system, a data sampling and processing coil control loop, a power supply and the like, and can be used for sampling and processing relevant parameters of a switch contact mechanism and an electromagnetic switch, giving out a corresponding control instruction according to a predetermined action procedure and achieving the process control on attraction, absorption and disconnection of the alternating current contactor. Since the single-pole electromagnetic switches are used for respectively controlling each phase of circuit, fixed-phase switch-on and zero-current switch-off of a three-phase main circuit are achieved, a new generation of alternating current electromagnetic electrical product can be formed, the application range of the switch is expanded, the breaking ability of the switch is enhanced, and the electrical lifetime of the switch is prolonged.

A radiation image pickup apparatus includes a pixel array including a plurality of pixels arranged in a matrix and configured to convert a radiant ray into electric signals, signal processors configured to output digital signals obtained in accordance with the electric signals output from the pixel array in parallel, and a controller configured to operate the signal processors after the signal processors enter a second power consumption state in which power consumption is higher than that of a first power consumption state from the first power consumption state after irradiation of a radiant ray to the pixel array is terminated, and to cause the signal processors to output digital signals after the signal processors are operated.

A moisture detection system includes an electrical conductor disposed on a surface of a substrate. The electrical conductor has a resonant frequency that varies as a function of an amount of moisture present adjacent the electrical conductor. An oscillator outputs an oscillator signal at a predetermined amplitude and a predetermined frequency. A resonator circuit is coupled to the electrical conductor and is responsive to the oscillator signal and the resonant frequency of the electrical conductor for outputting a resonator signal having an amplitude related to the resonant frequency of the electrical conductor. A filter circuit rectifies and filters the resonator signal and provides it to an analog-to-digital converter which outputs a digital signal related to the rectified and filtered resonator signal. A controller is responsive to the digital signal for causing a system associated with the substrate to operate in accordance with the digital signal.

The invention relates to a device for reducing noise pollution of an automobile horn and application of the device. The device is mounted on an automobile and comprises a digital signal controller, an audio coder-decoder, an environmental noise sensor, a press sensor, a power amplifier, a loudspeaker, a liquid display and a power interface. The application comprises: the audio coder-decoder detects and records environmental noise information sensed by the environmental noise sensor, and transmits the information to the digital signal controller, and simultaneously, the digital signal controller detects and records press information sensed by the press sensor; the digital signal controller outputs loudspeaker control information to the audio coder-decoder according to the environmental noise information and the press information; the audio coder-decoder receives and decodes the loudspeaker control information, and transmits the control information to the loudspeaker after passing through the power amplifier; and the loudspeaker makes a sound according to the loudspeaker control information. Compared with the prior art, the device for reducing noise pollution of the automobile horn has the advantages of safe guarantee, strong anti-interference capability and the like, and nose is reduced.

The invention discloses a three-remote automatic test device for a power distribution terminal. The three-remote automatic test device comprises a digital signal controller, a current source assembly, a voltage source assembly, a remote signaling assembly, a remote control assembly, a data interface, a current sampling assembly and a voltage sampling assembly. The three-remote automatic test device for the power distribution terminal can automatically test functions and performances such as analog quantity acquisition, digital quantity acquisition and control quantity output of the power distribution terminal according to the test scheme. A test result is derived through the data interface, and a test report is formed. According to the three-remote automatic test device for the power distribution terminal, the automation degree of the test process is high, test efficiency is improved, and the test cost is reduced.

The invention discloses an improved self-adaptive noise reduction earphone, which comprises an external microphone used for collecting external noise of an environment where the earphone is located; an inner microphone which is used for acquiring the same sound waveform heard by human ears; a first analog-to-digital converter which is respectively connected with the outer microphone and the innermicrophone and is used for converting waveforms collected by the outer microphone and the inner microphone into digital signals; a controller which is connected with the output end of the first analog-to-digital converter and used for receiving the digital signal and controlling system output; the controller comprises a weight filter for extracting an effective area of the noise signal and a self-adaptive filter for performing real-time self-adaptive adjustment on the system by taking the error signal and the noise signal as variables; and a second analog-to-digital converter which is connected with the output end of the controller and is used for converting the digital signal output by the controller into an audio signal. The method is used for inhibiting the high-frequency signal upliftphenomenon caused by system delay in the noise reduction earphone and enhancing the performance of the noise reduction system in a non-Gaussian noise environment.

The invention relates to a networked controller of a high-frequency inverter power supply and a control method thereof. The controller comprises a control board, a main circuit, a functional circuit and a network interface, wherein, the control board is based on a microprogrammed control unit (MCU) in charge of display and communication functions and a digital signal controller (DSC) in charge of inversion and protection control functions of the high-frequency inverter power supply; a serial peripheral interface (SPI) is adopted between the MCU and the DSC for carrying out high-speed synchronous data information transmission; a network interface is an RS-485 interface; the controller realizes remote control by RS-485 bus networking and can form a power supply network with other power supplies; a remote upper computer can carry out relevant operation on a command sent by the controller in real time and avoid local control; and a controller protocol for realizing network control realizes networked control of the high-frequency induction heating inverter power supply by an Modbus remote terminal unit (RTU) communication protocol which is widely applied.

The invention discloses an all-digital control photovoltaic module simulator and a control method of the all-digital control photovoltaic module simulator. The all-digital control photovoltaic module simulator comprises a main circuit, a control circuit, a digital signal controller dsPIC33FJ64GS606 and an auxiliary power supply. The main circuit mainly comprises a synchronous buck converter and an overcurrent and overvoltage protection circuit. The control circuit comprises a current measuring and conditioning circuit, a voltage measuring and conditioning circuit and an MOSFET driving circuit. The all-digital control photovoltaic module simulator and the control method of the all-digital control photovoltaic module simulator solve the working condition problems of short circuit and open circuit of a system and the problems of load sudden change transient overcurrent and overvoltage, improve reliability and safety of the working process of the circuits, prolong the service life of the circuits, lower maintenance cost, and can be used for simulating a solar panel.

The invention discloses a device and a method for real-timely monitoring the signal conversion of a servo motor control system, wherein an isolating circuit of a high speed photoelectric coupler digitally isolates a clock signal of a single peripheral interface (SPI) bus, a data signal and an SPI selective signal from equipment, a complicated programmable logic device receives the data bits which are isolated by the high speed photoelectric coupler and combines every 16 data bits into a data byte, and the data byte is sent to a data buffer area in a universal serial bus (USB) device controller; a circuit of the USB device controller sends the data in the data buffer area to a computer; and an electrically erasable programmable read-only memory downloads the USB equipment controller code which is stored in the electrically erasable programmable read-only memory into the USB equipment controller. The transmission rate between a digital signal controller and a computer can be obviously improved, the working state of a servo motor is more intuitively reflected, and the real-time monitoring of the servo motor control system is realized.

The invention provides a pixel driving circuit and a display device. The pixel driving circuit comprises a site selection transistor, a driving transistor, a storage capacitor and a plurality of pixelunits connected in parallel, the drain electrode of the site selection transistor is electrically connected with the grid electrode of the driving transistor. One end of the storage capacitor is connected with the gate of the driving transistor, the other end of the storage capacitor is connected with the drain electrode of the driving transistor; the pixel unit is connected with the drain electrode of the driving transistor, the pixel unit comprises a digital signal controller, and the digital signal controller is connected with the anodes of the plurality of light emitting units in series;the grid electrode of the site selection transistor receives a scanning signal, the digital signal controller provides a digital signal, and the scanning signal and the digital signal enable the light-emitting unit to emit light periodically to form a preset frame display picture. The pixel driving circuit has the beneficial effects that the digital signal controller is additionally arranged in the pixel driving circuit, so that the digital signal controller controls the light-emitting unit to emit light periodically to realize the matching of spatial multiplexing and time division multiplexing, and the problems that the gray-scale switching frequency of the pixel driving circuit is too high and the occupied space is relatively large are solved.

The invention relates to a bus type carbon-dioxide laser high-frequency switching power supply. The bus type carbon-dioxide laser high-frequency switching power supply is characterized by comprising a bus, a plurality of digital signal controllers and a plurality of switching power supplies, the digital signal controllers are parallelly connected on the bus, each four switching power supplies forming a group are parallelly connected on one digital signal controller, the bus is communicated with a main controller which is used for transmitting control information to the bus, the bus is used for transmitting synchronizing signals to the digital signal controllers, and the digital signal controllers are used for transmitting pulse-width modulation signals to the switching power supplies. The bus type carbon-dioxide laser high-frequency switching power supply not only improves reliability of a voltage system and is convenient for centralized and remote control, but also enables more power supplies to be combined in use. Besides, the bus type carbon-dioxide laser high-frequency switching power supply can improve laser power supply quality and more effectively meets technological requirements of laser cutting and welding.

The embodiments of the invention provide a method and a device for monitoring a battery module in a measurement while drilling system. The method comprises the following steps of: respectively acquiring a main battery pack parameter and a subsidiary battery pack parameter by a main battery parameter detecting circuit and a subsidiary parameter detecting circuit, wherein the main battery pack parameter and the subsidiary battery pack parameter respectively comprise respective output current and output voltage of a main battery pack and a subsidiary battery pack; obtaining respective residual electric energy of the main battery pack and the subsidiary battery pack by a digital signal controller according to the main battery pack parameter and the subsidiary battery pack parameter; and judging whether at least one of the output voltage and the residual electric energy of the main battery pack which currently works is lower than a preset voltage threshold value and electric energy threshold value by the digital signal controller, wherein a shift switch is switched on, and the subsidiary battery pack is used for supplying power for the measurement while drilling system if at least one of the output voltage and the residual electric energy of the main battery pack which currently works is lower than the preset voltage threshold value and electric energy threshold value. The method can be used for exactly detecting the residual electric energy of the main battery pack and the subsidiary battery pack, and seamlessly switching the main battery pack and the subsidiary battery pack to supply power when the output voltage of the main battery pack is lower than the set threshold value caused by the insufficient residual electric energy of the main battery pack.

The invention relates to a signal acquisition and storage device for VSP (Vertical Seismic Profiling) measurement while drilling, which comprises a signal acquisition circuit and a data storage circuit, wherein the signal acquisition circuit comprises a sampling digital signal controller, an analog-to-digital converter, a detector, a sample buffer array and a hydrophone; the detector and the hydrophone are connected with the analog-to-digital converter via a differential amplifier respectively; the analog-to-digital converter and the sample buffer array are respectively connected with the sampling digital signal controller; the digital signal controller is connected with a clock module; and the data storage circuit comprises a storage data word signal controller, a storage chip array manager and a storage device array. The device of the invention has the following advantages that a high-temperature chip is adopted, the storage performance is stable, the reading speed is quick, and the storage capacity can meet storage space needed by a four-component VSP measurement tool while drilling for 200-hour continuous work.

The invention relates to a detection device for an electronic release of a low-voltage apparatus, and a control method. The detection device comprises a current and voltage signal port for detecting a to-be-detected electronic release, an embedded touch-control PC, a rising constant-current circuit and a rising constant-voltage circuit for providing rising constant-current and rising constant-voltage signals for a digital signal controller, the digital signal controller, a LAN (Local Area Network) or an external memory and a printer; the embedded touch-control PC transmits parameters pre-stored or set by users into the digital signal controller through a serial port COM; the digital signal controller controls a voltage regulator according to the acquisition result so as to regulate loop voltage and loop current to realize the set voltage regulation result, and the pressure regulating result is transmited to the embedded touch-control PC through the serial port COM; and the embedded touch-control PC inputs a test report into the LAN or the external memory through a USB (Universal Serial Bus) 2.0 and a network interface. Based on the modularized assembling mode, the detection device can detect various different electronic releases (electronic plates), so that detection efficiency is improved, cost on the detection equipment is reduced, detection is more reliable and has better consistency, and the detection device is convenient for management.