9 results about "Digital algorithm" patented technology

The application discloses a kind of multi-modal flexible sensor adaptive signal conditioning system design method, belong to flexible sensor signal conditioning technical field.The present application overcomes the defects of poor universality, performance compromise, high cost of mass production of existing conditioning circuit, adopts layered decoupling and dynamic reconstruction system-level architecture: through multi-modal feature analysis and demand mapping modeling, the feature vector composition of scene recognition is determined;Design configurable analog front end, integrate instrument amplifier, transimpedance amplifier, charge amplifier, bridge amplifier four parallel processing sub-modules, wherein charge and bridge amplifier adopt self-designed architecture with dynamic adaptive gain adjustment capability;Build heterogeneous digital processing platform with NPU, CPU, DSP as core, through cross-modal data fusion, scene recognition engine, dynamic hardware configuration combined with feedforward and feedback, loadable algorithm library and closed-loop optimization control law, realize the real-time scene reconstruction of hardware parameters and digital algorithm;Combined with domestic single-chip selection, rigid-flex PCB and automatic calibration, meet the demand of low-cost mass production.The present application realizes the native adaptation and performance optimization of single hardware platform to voltage, current, charge, impedance and other types of sensor signals, and can be widely applied in robot dexterous hand, medical monitoring, intelligent bandage, consumer motion monitoring and industrial monitoring fields.

The invention discloses a laser collimation measurement system and method for a digital compensation light drift angle, and belongs to the technical field of precision measurement, and the system comprises a laser output unit, a collimating lens, a light drift angle measurement unit, a straightness measurement unit, a two-dimensional angle measurement unit and a signal processing unit. The light drift angle measuring unit measures the light drift angle through a light retroreflector, a lens and a photoelectric detector, the straightness and two-dimensional angle measuring unit obtains original measuring signals through an optical splitter and the photoelectric detector, and the signal processing unit receives signals of all the photoelectric detectors. And calculating a real straightness error and a real angle error of the measured object, and performing digital compensation on a measurement error caused by a light drift angle. Through one-way optical path design, common-path compensation and a digital algorithm, the influence of the light drift angle on the measurement precision in long-distance measurement is effectively suppressed, and the method is suitable for high-precision geometric error measurement of large equipment such as a gantry machine tool.

The application discloses a kind of MZM array bias point control method and circuit based on high harmonic suppression, it is related to circuit control technical field, comprising the following steps: S1, generate low-frequency sinusoidal signal, after processing, load to MZM array;S2, the optical signal output to MZM array is preprocessed;S3, the optical signal after preprocessing is sampled, and the amplitude spectrum in frequency domain is obtained;S4, according to the amplitude spectrum in frequency domain, calculate harmonic ratio;S5, based on harmonic ratio, the corresponding direct-current bias voltage is output, the locking of bias point is realized.The application uses digital FFT algorithm to replace expensive analog demodulation circuit, while ensuring high performance, substantially reduce hardware cost and PCB area, conducive to engineering batch application.

The invention discloses a pedestrian detection-oriented physical adversarial patch generation and migration method, and belongs to the field of computer vision and artificial intelligence security. The invention provides a shape-texture two-stage layered optimization and Min-Max robust migration framework aiming at the problems of abrupt patch shape, difficulty in reproduction of pixel-level noise and poor environmental adaptability in the existing physical countermeasure attack. The method comprises the following steps: firstly, constructing a smooth patch contour by using a centripetal Catmull-Rom spline curve, and optimizing an anchor point coordinate through a differential evolution algorithm so as to lock an effective receptive field which is most sensitive to a model; secondly, constructing a discrete texture coding space based on a physical adhesive tape, and searching an optimal stripe texture formed by the color, width and direction of a standard adhesive tape in a fixed shape; meanwhile, a Min-Max robust optimization strategy is introduced, and the anti-interference capability of the patch is improved by minimizing the maximum confidence coefficient under the worst illumination transformation; and finally, a physical mapping strategy based on vector reconstruction is adopted, a precise transformation model from pixels to millimeters is established, and an SVG vector manufacturing file irrelevant to resolution is output. According to the method, precise closed loop of the anti-patch from digital algorithm optimization to physical object manufacturing is realized, and the method has the advantages of high physical realizability, natural and hidden shape, high environmental robustness and the like.

The present invention discloses a system for entangling multiple root keys with multiple arbitrary user-defined and self-generated input data using a Physically Unclonable Function (PUF) and a proposed digital algorithmic system. The key innovation lies in the combination of a PUF-based dynamically measurable entropy source and the proposed invention, enabling the generation of multiple true random keys. These keys serve as a secure foundation for establishing cryptographic channels, allowing the creation of isolated secure channels for different stakeholders and applications. The ability to create isolated secure channels with multiple root keys enables the establishment of multiple roots of trust, enhancing the integrity and security of cryptographic operations. The invention finds applications in various domains, such as FIDO authentications, point-to-point encryptions, crypto wallets, and encryption key management systems.

A method for digitally detecting the number of suspended particulates includes: providing a particulate sensor, which includes an airflow channel, a micropump, a laser emitting component, and a photodiode (PD). The micropump introduces air containing suspended particulates into a measurement area. The laser emitting component emits a laser beam toward the measurement area at an orthogonal point, thereby generating scattered light. The photodiode senses the scattered light and converts it into an electrical signal. Then, the photodiode uses a built-in digital algorithm to divide the electrical signal into N energy intervals. The number of particles is recorded in each interval, and the number of particles is recorded in each digitally calibrated distribution interval, forming a fine data distribution. Data processing and cumulative data calculation are then performed to determine the particle size, total number of particles, and concentration of suspended particulates for each particle size range (below PM1, PM2.5, and below PM10).

The invention provides a low-voltage AGC (Automatic Gain Control) circuit for an inductance encoder. The device is characterized by comprising a sine channel PreAmp (1), a cosine channel PreAmp (2), a sine channel dB linear amplifier (3), a cosine channel dB linear amplifier (4), a phase difference circuit (5), a vector amplitude synthesis circuit (6), a quantization circuit (7), a digital algorithm circuit (8), a sine channel output buffer (9) and a cosine channel output buffer (10). According to the invention, an innovative full-simulation vector amplitude synthesis circuit is adopted to replace a traditional switched capacitor scheme, so that the technical bottleneck that the signal amplitude cannot be accurately detected in a low-voltage environment is successfully overcome, and the AGC system can stably work and accurately control the output amplitude at the low voltage of less than or equal to 3.3 V. In combination with a wide dynamic range brought by a dB linear amplifier and precise control of a digital intelligent algorithm, the circuit finally provides a complete low-voltage solution with high response speed, ultrahigh amplitude stability and excellent anti-interference capability for an inductance encoder, and is particularly suitable for low-power-consumption scenes such as portable equipment and the Internet of Things.

The invention relates to the technical field of laser frequency stable control, precise spectral measurement and optical metrology, and discloses a common-cavity double-optical-comb repetition frequency difference locking method and related equipment. Acquiring two paths of repetition frequency signals of the double-optical-comb mode-locked laser and performing digital processing to obtain an actual frequency value; calculating a control error between the actual frequency difference and a preset target value, and outputting a digital control quantity through a digital algorithm module; the resonant cavity length of the laser is fed back and adjusted, and the long-term drift of the frequency difference is inhibited; and monitoring a control signal and an error in real time, and executing reset relocking when a safety threshold value is exceeded or a lock is lost. According to the invention, the problem of repetition frequency difference long-term drift caused by slow factors such as environment temperature drift, mechanical disturbance and device aging is solved.