6 results about "Dsp digital signal processor" patented technology

The invention provides a high-power high-reliability voltage retainer used for an automobile starting and stopping system. The high-power high-reliability voltage retainer is higher in power and reliability and smaller in size and ripple. The high-power high-reliability voltage retainer comprises a through circuit module (1), a booster circuit module (2), a reversed polarity circuit module (3), a CAN transceiver (4), a CPU (5), a DSP (digital signal processor) (6) and a battery. A battery input port and a battery output port are formed in the through circuit module (1), a battery input port and a battery output port are formed in the booster circuit module (2), and the reversed polarity circuit module (3) is electrically connected with the booster circuit module (2); the CAN transceiver (4), the CPU (5) and the DSP (6) are sequentially and electrically connected; the CPU (5) is electrically connected with the through circuit module (1), and the DSP (6) is electrically connected with the through circuit module (1); the DSP (6) is electrically connected with the booster circuit module (2).

The invention relates to a track circuit comprehensive analyzer which comprises an induction coil, an amplifier, a low-pass filter, an A / D analog-to-digital converter and a DSP digital signal processor which are connected in sequence, and the induction coil induces current information on a steel rail in a non-contact mode; the display screen and the memory are connected with the DSP digital signal processor. A plurality of contrast center frequencies are arranged in the DSP digital signal processor, and after the received current signals are processed, the uplink and downlink directions of the line where the steel rail is located are directly output to a display screen. The technical scheme is simple and convenient to operate, quick in result obtaining, simple and easy to understand, and suitable for being used by vast railway operators.

The invention provides a spatial orientation active noise reduction system and method. The spatial orientation active noise reduction system comprises a signal input module, a signal processing module and a signal output module, the signal input module comprises a reference microphone for collecting a target noise signal and an error microphone for collecting a residual noise signal; the signal processing module comprises an analog-to-digital converter, a DSP digital signal processor, a digital-to-analog converter and a power amplifier. The DSP digital signal processor processes an input target noise signal and a residual noise signal based on an adaptive filtering algorithm to generate a secondary noise control signal; the signal output module comprises a secondary loudspeaker for emitting secondary sound waves; the reference microphone, the error microphone and the secondary loudspeaker are arranged along the same linear direction, and the secondary sound wave is propagated along the linear direction and destructively interferes with the target noise to realize noise reduction. The method is particularly suitable for application scenes with clear noise source directions, and effective noise reduction in a large space range can be achieved with few hardware resources.

The present invention discloses a photovoltaic MPPT control system based on a sliding mode variable structure-global comparison composite algorithm in the field of photovoltaic MPPT control. The control system comprises a temperature and light variable module, a photovoltaic array, a DC-DC converter, a voltage and current sensor, a temperature and light sensor, an MPPT algorithm module, a PWM module, a DSP digital signal processor, a power supply circuit, a drive circuit, and a computer display. The temperature and light variable module is used to simulate shadows caused by tree branches and poles on the photovoltaic array. The MPPT algorithm module uses a main algorithm, a sliding mode variable structure control algorithm, supplemented by a global comparison algorithm, to periodically search for the maximum power point of the photovoltaic array under shadows. The present invention can avoid the problem of traditional algorithms tracking local extreme values, prevent the photovoltaic array from being burned out due to high heat caused by shading, improve tracking speed, accuracy, and safety, and weaken oscillations near the global maximum power point.

The present invention discloses an optical disc library system that directly transmits optical storage laser signals through optical fibers. The laser signals containing data information reflected from the data optical disc are coupled to the optical fibers through a coupling lens, and the optical pulse signals are transmitted in the optical fibers to an optical fiber transmitter composed of a wavelength division multiplexer, a semiconductor amplifier, and an adjustable bandpass filter, which converts the wavelength of the blue light signals containing data information to the optical fiber communication wavelength, and then conducts optical fiber communication transmission. When it is transmitted to the server side, the photoelectric effect of a photodiode (PIN) is used to convert the optical signal into an electrical signal, and then through a signal amplifier, a DSP digital signal processor, and a decoding chip, the final stored data is obtained. The propagation link of the present invention is simple, has strong anti-interference ability, effectively improves the reliability of data propagation, and solves problems such as speed bottlenecks and low transparency.

The invention discloses an airborne heterogeneous computing general control board card based on DSP and FPGA, which comprises a discrete magnitude circuit, an analog quantity circuit, a reset circuit, two external connectors, a DSP processor and an FPGA circuit, the input end of the DSP processor and the input end of the FPGA circuit are connected with a power supply circuit, the DSP processor and the FPGA circuit are in communication connection through Xintf, and the FPGA circuit is in communication connection with the DSP processor. An ADC interface of the DSP processor is connected with an ADC converter with a voltage stabilizer; the DSP is matched with the FPGA programmable logic array control architecture, 16-bit ADC conversion, Flash and RAM circuits are externally expanded, the functions of collection, data processing, storage, communication and data recording are integrated, the expansibility and universality are high, the FPGA is high in flexibility and has the parallel processing capacity, different application scenes and requirements can be adapted through reprogramming, and the application range is wide. And the comprehensive requirements of an airborne environment on high-intensity numerical calculation, strong real-time response and high-universality interface control are met.