182 results about "Signal chain" patented technology

The invention relates to the technical field of anti-electromagnetic interference, in particular to an anti-electromagnetic interference method for a flywheel energy storage system of a data center, which comprises the following steps: acquiring change rate data of the rotating speed and the angular speed of a flywheel, judging the attribution of a disturbance interval, recording change characteristics, extracting an interference identifier, comparing the interference identifier with impedance change, and generating a switching node. Frequency response and reflection coefficient characteristics of the filtering unit are detected, a coupling channel generation label is identified, and output fluctuation is evaluated to generate an anti-interference capability state label. According to the method, the surface resistivity of the shielding layer is dynamically switched according to the comparison result of the specific interference triggering identification bit and the signal link impedance change state in each disturbance stage through classification judgment and correlation marking of inertial disturbance, so that the effect of suppressing electromagnetic interference in real time is optimized; the influence degree of electromagnetic interference can be dynamically evaluated in the system operation process, and the adaptability of the energy storage system to the electromagnetic interference is judged and adjusted in real time.

The invention relates to the technical field of direct-current power supply fault diagnosis, in particular to a fault self-diagnosis modular direct-current power supply system, which is characterized in that a failure mechanism dynamic modeling unit constructs a multi-stress coupling degradation mapping library, adopts a degradation mechanism decoupling algorithm to separate and superpose failure effects and generates a dynamic degradation model; the early degradation capture unit deploys a high-frequency wide-domain sampling circuit and a noise suppression signal chain, combines time-frequency domain joint feature extraction and separates degradation feature signals from background noise, and the self-adaptive life prediction unit adopts a long short-term memory network and random forest fusion algorithm to dynamically correct parameters and output residual life probability distribution. The intelligent fault judgment unit realizes progressive diagnosis through a hierarchical threshold decision mechanism, and the health management cooperative execution unit triggers a pre-maintenance strategy, executes power flexible derating, redundancy switching or directional fusing isolation, and improves the reliability of the system.

The invention is suitable for the technical field of semiconductor testing, and provides a data acquisition method and device based on a DDIC chip, and testing equipment, and the data acquisition method comprises the steps: receiving a test pattern, controlling the DDIC chip to output a corresponding gray scale voltage signal, and achieving the comprehensive testing of the response capability of the chip in a full gray scale range; secondly, a target acquisition link composed of functional units including impedance conversion, single-ended to differential conversion, programmable gain amplification, filtering, analog-to-digital conversion and the like is utilized, so that the signal driving capability and the anti-interference capability are effectively improved, meanwhile, high-frequency noise and nonlinear distortion are reduced, and the basic quality of sampled data is guaranteed; on the basis, sampling optimization processing is carried out on the sampling data based on the FPGA unit, and the data stability is improved. According to the scheme, through high-precision transmission of the signal link, the data acquisition precision of the DDIC chip is improved, and then the technical requirements of high-precision DDIC chip testing are met.

Described herein are techniques that improve efficiency of analog-to-digital conversion circuits by reducing idling time, during which the ADC circuit is not converting an analog signal to a digital representation, which reduces associated power consumption from keeping the ADC circuit running during idling time. In some embodiments, chop circuits may be used in combination with a plurality of track-and-hold circuits to acquire one polarity of an input signal and convert another polarity of the input signal during a same sampling period. A chop circuit may be configured to alternate between generating a first polarity of the input signal and a second polarity of the input signal. A first T / H circuit may be configured to acquire one polarity of the input signal from the chop circuit while a second T / H circuit provides another polarity of the input signal, previously acquired from the chop circuit, to an ADC for conversion.

The invention provides a battery capacity detection circuit and detection method. One end of a first signal link of the battery capacity detection circuit is used for being connected with a battery to be detected, and the other end is connected with a first control unit; one end of the second signal link is connected to the first signal link, and the other end is grounded; a divider resistor is arranged on the second signal link; the second control unit is configured to disconnect the second signal link before detecting the capacity of the battery to be detected; under the condition that the capacity of the battery to be detected is detected, conducting a second signal link; the first control unit is used for acquiring a first voltage signal when the second signal link is disconnected and acquiring a second voltage signal when the second signal link is connected; the first control unit is also used for obtaining the capacity of the to-be-detected battery based on the first voltage signal and the second voltage signal; the capacity of the to-be-detected battery is calculated through the first signal and the second signal, and compared with detection of a single voltage value, the detection accuracy is higher.

The invention relates to the technical field of optical communication, in particular to a front optical fiber amplifier with a power balancing function. On the basis of a traditional Er-doped optical fiber amplifier, incident light is divided into a signal link and a competition link through a light splitting device with a fixed proportion. The purpose of introducing the competitive link is to generate a competitive wavelength which has an obvious competitive effect with the signal light in the EDF, and gain competition is carried out in the amplification process of the signal light in the EDF; wherein the competitive link finishes conversion from signal light wavelength to wavelength with obvious competitive effect by adopting a four-wave mixing principle based on HNLF, and then reversely inputs the converted competitive light into the EDF of the signal link to carry out a light amplification process with gain competition, so that the aim of reducing the output power fluctuation range after the signal light is amplified by the EDF is fulfilled.

The invention discloses a power supply self-adaptive active temperature compensation attenuator which comprises a radio frequency attenuation circuit, a positive voltage temperature compensation driving circuit and a power supply self-adaptive adjusting circuit. The radio frequency attenuation circuit is connected in series in a signal link and comprises a transistor and a resistor; the positive voltage temperature compensation driving circuit comprises a transistor, a diode and a resistor. The driving transistor outputs a voltage playing a temperature compensation role by utilizing the temperature change of the electrical characteristic of the diode, and outputs the voltage to the radio frequency attenuation circuit in a voltage division manner; the power supply self-adaptive adjusting circuit comprises a resistor and a diode, the resistor and the diode adjust the grid voltage of a transistor in the driving circuit when the power supply fluctuates, the output voltage of the whole driving circuit is adjusted, and the influence of power supply fluctuation on the driving circuit is counteracted. Positive voltage is used for working, the structure is novel, the chip size is small, the temperature compensation characteristic is good, and the application range is wide; and the power supply interference resistance is good.

The invention relates to the technical field of visible light communication, and discloses an intelligent lamp data transmission system based on visible light communication. The system comprises an optical signal processing module, a transmission management module and a terminal control module. The optical signal processing module collects and processes the visible light signal and outputs a light intensity space coding signal; after the transmission management module receives the signal, the signal is decoded by the signal analysis unit to obtain an original data stream signal and a channel interference characteristic signal, the channel optimization unit processes the original data stream signal and the channel interference characteristic signal to obtain an optimal modulation parameter signal, and the transmission strategy unit outputs a dynamic bandwidth allocation signal; in the terminal control module, an adaptive modulation execution unit adjusts the driving parameters of the light emitter according to the optimal modulation parameter signal, a lamp array control unit adjusts the working state of a lamp light-emitting unit and collects a real-time link state signal, and a link monitoring module outputs a communication quality index. The system is suitable for an intelligent illumination and data transmission fusion scene.

The invention discloses a low-power-consumption electromagnetic water meter system with dynamic excitation and self-calibration functions, which comprises a sensor layer, a metering board, a main control board and a communication board, and is characterized in that the sensor layer comprises an excitation coil, an electrode pair, a temperature sensor and a pressure sensor; the metering board comprises an excitation driving circuit, a signal conditioning circuit, a high-precision ADC and a register block, the main control board comprises an embedded processor, an RTC clock, a data storage module and a display screen, and the embedded processor is used for receiving signals and processing and executing tasks according to a pre-written program; the RTC clock is used for providing an accurate and continuous time reference for the embedded processor; the communication board comprises an NB-IoT / 485 / PWM multimode communication interface, when water flow passes through the measuring pipe, the electrode pair generates an induced voltage signal, after the induced voltage signal is converted by the signal conditioning circuit and the high-precision ADC, the main control board optimizes excitation parameters in real time by combining environmental parameters and a cloud platform strategy, and meanwhile, triple calibration is periodically executed to ensure the precision of a signal chain.

Various techniques are described for correcting distortion in an analog input signal after digitization in a receiver signal chain. The techniques include a system that stores concatenated distortion correction terms, allowing for efficient data handling and processing. The techniques further include a system that has a smaller number of replica memories compared to primary memories, which store operational data. The replica memories are updated with new data and may be swapped with primary memories to update them without interrupting system operations. The techniques further include a dither system that uses two memories to store and process the dithered signals, which are then combined to produce a noise-corrected digital output. The techniques further include a system to correct distortions in analog input signals processed through multiple parallel paths.

The invention discloses a high-integration-level miniaturized TMR magnetic field sensor and a use method thereof, relates to the technical field of electrical equipment measurement, and solves the problems that most existing TMR sensors in the prior art are discrete devices, the system integration level is low, and the noise immunity and the stability are not high in an electric power environment with high-frequency signals and strong electromagnetic interference. The TMR magneto-sensitive unit, the signal conditioning circuit and the analog / digital interface are highly integrated in the same package, and the size of the sensor is remarkably reduced while high sensitivity and broadband response are kept. Besides, by optimizing the magnetoelectric structure design and the signal chain topology, background noise and bias drift are reduced, the measurement precision is improved, and the method is particularly suitable for high-density layout, complex electromagnetic environments and high-bandwidth measurement scenes. According to the invention, a better current measurement solution is provided for novel power systems such as a smart power grid, a modular power electronic device and a distributed energy system.

Various techniques are described for correcting distortion in an analog input signal after digitization in a receiver signal chain. The techniques include a system that stores concatenated distortion correction terms, allowing for efficient data handling and processing. The techniques further include a system that has a smaller number of replica memories compared to primary memories, which store operational data. The replica memories are updated with new data and may be swapped with primary memories to update them without interrupting system operations. The techniques further include a dither system that uses two memories to store and process the dithered signals, which are then combined to produce a noise-corrected digital output. The techniques further include a system to correct distortions in analog input signals processed through multiple parallel paths.

The invention discloses a method for improving decoding robustness of an MIPI A-PHY (Mobile Industry Processor Interface A-Physical Layer) cable, and belongs to the field of high-speed serial buses. The method comprises the following steps: in a process of establishing a signal link between a local end and an opposite end, periodically sending a 01 sequence with a fixed length and a fixed format by a sending end, and recording the 01 sequence as a first sequence; and in the stage of establishing the double-end signal link, the receiving end continuously detects the received code stream, and when the receiving end continuously detects that the number of times of the first sequence reaches a preset threshold value thresholdA, the double-end signal link work is completed. Compared with a cable link algorithm which does not limit adjacent detection intervals, the algorithm provided by the invention has the advantages that the cable link judgment standard is improved, the occurrence of misrecognition caused by poor signal quality is effectively avoided, a foundation is laid for subsequent decoding operation, the credibility of real data after decoding is improved, the realizability on a hardware circuit is high, and the method is suitable for popularization and application. The method has high configurability, and improves the degree of adaptation to different link detection environments.

This invention provides a satellite-launch separation signal system and a satellite-launch separation system, comprising: a first user unit that outputs two satellite-launch separation signal sources, each leading to two different contacts of a first analog separation relay; these signals then return to the first user unit via a first separation connector and a second separation connector; the input and output terminals of the first analog separation relay are each connected to a satellite display socket via cables; and a second user unit that outputs two satellite-launch separation signal sources, each leading to two different contacts of a second analog separation relay; these signals then return to the second user unit via a first separation connector and a second separation connector; the input and output terminals of the second analog separation relay are each connected to a satellite display socket via cables. This invention ensures that the signal is provided by the analog satellite-launch separation relay during ground testing, and avoids fatal malfunctions such as accidental separation commands issued before launch or mis-separation due to severe vibrations during the active phase, thus improving the reliability of the satellite-launch separation signal link.

The invention belongs to the technical field of intelligent health monitoring and wearable equipment, and particularly relates to an intelligent wearable terminal health data real-time synchronous monitoring system which comprises a multi-mode interface dynamic sensing subsystem, a self-adaptive light path compensation subsystem, a physical layer compensation coprocessor, a main application processor and a wireless transmission module. The method is characterized in that the dynamic state of an interface is sensed in real time through an MEMS pressure array, an IMU and a ToF displacement unit, the contact state is fused and estimated through an EKF algorithm, an MEMS micro-reflector is driven to implement closed-loop optical compensation, and an incident light path is stabilized; and meanwhile, the compensation metadata and the PPG signal are packaged into a fusion data frame, and the fusion data frame is synchronously transmitted to a remote platform in real time. Through high-frequency closed-loop control of the MEMS micro-reflector, the system can eliminate noise before the noise is injected into a signal link, so that the purity and fidelity of an original PPG signal are fundamentally ensured, and the heart rate monitoring precision under strong interference scenes such as strenuous exercise and the like is greatly improved.

The invention relates to the field of vehicle control, in particular to a vehicle window control method and device, equipment and a medium. Existing signals of the safety airbag controller and the emergency call module are integrated to serve as a triggering basis, new signals do not need to be additionally developed for linkage of multiple controllers, and starting judgment of emergency disposal is directly achieved through an original signal link of the vehicle. According to the method, a collision explosion indication signal and an emergency calling activation signal are taken as core triggering conditions, and detection logic of emergency disposal conditions is combined, so that the signal interaction requirement among multiple controllers is simplified, the cost of hardware adaptation, protocol debugging and the like caused by signal development is reduced, the emergency response reliability is guaranteed, and meanwhile, the system reliability is improved. Extra signal development cost investment is avoided, and the problem that cost is increased due to the fact that signals need to be developed additionally in multi-controller linkage in the prior art is effectively solved.

The application provides a serial multi-chip communication device applied to a signal chain chip and a corresponding method. It relates to the technical field of chip serial communication and solves the problems of line design complexity and increased hardware resource occupation in the prior art. The device comprises: a chip select differential negative end of a master controller and a chip select input end of a first-level chip are interconnected; a second-level chip forms a chip select series connection structure; a slave chip select output end of the first-level chip and a chip select input end of a first second-level chip of the chip select series connection structure are interconnected; a serial differential positive end, a clock signal output end and a feedback signal input end of the master controller are respectively interconnected with a slave input end, a clock signal input end and a slave output end of the first-level chip and each second-level chip. The application can reduce resource consumption, realize access to different slave chips and is easy to adjust and expand.

This invention relates to the field of visible light communication technology and discloses a smart lighting data transmission system based on visible light communication. The system includes an optical signal processing module, a transmission management module, and a terminal control module. The optical signal processing module acquires and processes visible light signals, outputting a spatially encoded light intensity signal. The transmission management module receives this signal, decodes it through a signal analysis unit to obtain the original data stream signal and channel interference characteristic signal, processes it through a channel optimization unit to obtain the optimal modulation parameter signal, and outputs a dynamic bandwidth allocation signal through a transmission strategy unit. In the terminal control module, an adaptive modulation execution unit adjusts the light transmitter drive parameters according to the optimal modulation parameter signal, a lighting array control unit adjusts the working state of the lighting units and collects real-time link status signals, and a link monitoring module outputs a communication quality index. This system is suitable for scenarios integrating smart lighting and data transmission.

Integrated circuit devices and circuitry for digital filtering are provided. An integrated circuit device may include a first digital signal processing (DSP) block with first hardened arithmetic circuitry and an output register to store an output of the first DSP block and a second DSP block with second hardened arithmetic circuitry and an input register to receive the output of the first DSP block. An input signal chain may include a first set of registers to provide first input data signals to the first DSP block, a second set of registers to provide second input data signals to the second DSP block, and a third set of registers connected between the first set of registers and the second set of registers to provide delay equal to that of the output register of the first DSP block and the input register of the second DSP block.

The present invention relates to a method for managing the low frequency content obtained by a loudspeaker system comprising a plurality of loudspeaker devices, such as a surround sound loudspeaker system, wherein each individual loudspeaker device has a known response as a function of frequency under anechoic conditions comprising a phase response, the method comprising the steps of providing a plurality of loudspeaker devices (1, 2, 3, 4) and for each of said plurality of loudspeaker devices (1, 2, 3, 4) providing the corresponding phase response as a function of frequency obtained under anechoic conditions and for each of the individual loudspeaker devices (1, 2, 3, 4) inserting a filter device (5, 6, 7, 8) in the signal chain to the corresponding loudspeaker device (1, 2, 3, 4), where the individual filter device (5, 6, 7, 8) is configured such that the resulting phase response of each individual loudspeaker device (1, 2, 3, 4) under anechoic conditions is substantially the same for all of the loudspeaker devices (1, 2, 3, 4). The invention further relates to a loudspeaker system implementing the method of the invention.

The invention relates to a linearity detection system for an input buffer, and the system comprises a main buffer, a terminating resistor unit, an auxiliary buffer, a switched capacitor unit, an observation comparator, and a judgment unit. The input end of the main buffer and the first input end of the terminating resistor unit receive input signals respectively; the second input end of the terminating resistor unit is connected to a first common-mode voltage, the output end of the terminating resistor unit is connected to the input end of the auxiliary buffer, and the output end of the auxiliary buffer and the output end of the main buffer are connected to the input end of the observation comparator through the switched capacitor unit. The output end of the observation comparator is connected to the input end of the judgment unit, and the output end of the judgment unit is connected to the output end of the main buffer; the determination unit is used for determining a determination result for the main buffer and determining a compensation mode. The current linearity state of the main buffer can be rapidly detected in real time and a corresponding compensation mode can be obtained on the premise that a main signal chain is not interfered.

This invention discloses a compact UAV flight control board core component layout and efficient connection method, belonging to the field of UAV flight control design technology. The layout scheme centers on the main control module, achieving a radial and compact arrangement of various functional modules on a flight control board body with an area not exceeding 50cm²: sensor modules surround the main control module with a spacing not exceeding 5mm, power management and communication modules are diagonally distributed at the edges, and interface expansion modules are dispersed in the remaining edge areas. Independent digital and analog ground copper foils are provided, using single-point grounding. The connection method utilizes surface mount technology for direct soldering of core chips. The power link employs a tree topology and array filtering, while the signal link optimizes impedance matching and wiring. Connection detection and thermal adhesive reinforcement ensure reliability. This invention significantly reduces the size and weight of the flight control board, effectively reduces signal interference and transmission loss, improves connection stability and flight control accuracy, and is suitable for the needs of miniaturized UAVs.

The invention relates to a system (2) for ascertaining prediction data. The system (2) has a floating unit (4) and a remote base unit (6). The floating unit (4) has a coupling unit (8), a floating hose (10) and a detection system (12). A first end (14) of the floating hose (10) is connected to the coupling unit (8). The detection system (12) is designed to detect, as actual arrangement, a present geometric arrangement of the floating hose (10) relative to the monitoring unit. In addition, the detection system (12) is configured to detect and / or ascertain, as actual location, a present geographical location of the floating unit (4). The detection system (12) is additionally designed to ascertain actual location data which represent the actual location and the actual arrangement. The floating unit (4) is designed to transmit the actual location data via a signal link (18) to the base unit (6). The base unit (6) is designed to receive, as actual weather data, present weather data which represent the present wind strength, the present wind direction, a prediction of the wind strength and / or a prediction of the wind direction in each case of the wind at the actual location. The base unit (6) is additionally designed to receive, as actual sea data, present sea data which represent the present current strength, the present current direction, a prediction of the current strength and / or a prediction of the current direction in each case of the water at the actual location.

The application provides a precision large-bandwidth digital phase-locked amplifier with a hybrid sampling structure, comprising a signal-to-be-tested link, a reference signal link, a digital logic and a computing system; the signal-to-be-tested link inputs a signal to be tested, and outputs a first analog-to-digital conversion signal and a second analog-to-digital conversion signal to the digital logic and the computing system; the reference signal link inputs a reference signal, and outputs a third analog-to-digital conversion signal and a hysteresis comparison signal to the digital logic and the computing system; the digital logic and the computing system output a plurality of control signals to the signal-to-be-tested link and the reference signal link; the digital phase-locked amplifier with the hybrid sampling structure has a low-frequency sampling mode, a frequency down-conversion sampling mode and a high-frequency sampling mode, and the signal-to-be-tested link can improve the signal-to-noise ratio in the measurement of low-frequency signals and high-frequency signals.

The invention belongs to the technical field of superconducting circuits, and particularly relates to a method and a device for determining current of a signal link coupled to a quantum bit. A shunting device is arranged on the signal link; the method comprises the following steps: acquiring electrical property influence parameters and target electrical property parameters of the shunting device, wherein the electrical property influence parameters comprise unknown sub-parameters of electrical property influence and known structure parameters obtained by measuring the product morphology of the shunting device; constructing a spice model corresponding to the shunting device by using the electrical performance influence parameters, and optimizing the sub-parameters based on the target electrical performance parameters to obtain a spice model with the target electrical performance parameters; and running a signal link comprising the spice model to obtain a current of the signal link coupled to the quantum bit. The method has the advantage that the current value coupled to the bit can be more accurately determined.

This invention discloses a frequency self-calibration circuit based on a voltage-mode RC relaxation oscillator, belonging to the field of integrated circuits. By storing time errors, it performs negative feedback control on the trigger times of the rising and falling edges of the output clock signal, automatically calibrating the output signal frequency. Furthermore, it achieves DC deviation elimination in the self-calibrating operational amplifier, significantly reducing offset voltage. This invention solves the problem of unstable signal output frequency in voltage-mode RC relaxation oscillator circuits due to changes in ambient temperature. It can be applied to Delta-Sigma ADC circuits, filter circuits, phase-locked loop circuits, etc., improving resistance to ambient temperature changes and compensating for comparator switching delays. t d This improves the linearity of the clock oscillator, enhances circuit reliability, and meets the accuracy requirements of highly integrated signal chain acquisition systems.

The invention discloses a multi-anchor-node cooperative UWB indoor positioning method, device and equipment and a medium, and the method comprises the steps: introducing a plurality of anchor nodes to jointly receive an ultra-bandwidth positioning pulse signal transmitted by a processing card, and constructing a signal receiving time difference matrix in combination with information such as a signal arrival timestamp, signal receiving strength and environment perception parameters; the non-line-of-sight propagation probability among the anchor nodes is calculated, signal link reliability is quantified, signal strength and anchor node type information are combined, confidence weights are given to time difference measurement of different anchor nodes, a weight matrix is formed, interference of the anchor nodes which are greatly influenced by shielding, reflection or attenuation in final positioning calculation can be effectively reduced, and positioning accuracy is improved. And the positioning robustness and accuracy are improved. Multi-source sensing data, non-line-of-sight probability modeling and a dynamic confidence weight adjustment mechanism are introduced, effective compensation and adaptive optimization of channel uncertainty and anchor node difference in the UWB indoor positioning system are realized, and the high-precision positioning capability of the system is guaranteed.

The invention provides an instrument landing waveform design method and system based on an operator component. The method comprises the following steps: S1, carrying out operator splitting on an ILS waveform function; each operator undertakes a single signal processing function, has an independent input / output interface and configurable parameters, and forms a minimum functional unit. And S2, realizing the function of the operator component. For the function of each operator, an input / output interface and a parameter type are designed according to a core signal processing algorithm of an operator assembly. And S3, carrying out universal packaging on the operator assembly. By defining a unified interface standard and establishing an operator registration mechanism, general data stream adaptation and scheduling during operation are realized, and standardized packaging of operator components is completed. And S4, assembling the operator assembly. And assembling the packaged operators according to an ILS signal processing flow to generate a complete ILS waveform signal chain. The waveform component can be rapidly transplanted and deployed in different software defined radio systems, the development and verification period is short, the transportability is high, and the reusability is high.

The embodiment of the invention relates to the field of intelligent equipment, and discloses an equipment control method and device and a storage medium. The equipment control method comprises the following steps: detecting a charging signal, and generating a power supply signal under the condition that the charging signal meets a first preset condition; sending the power supply signal to a main control chip of the equipment through the first signal link so as to power on the main control chip; under the condition that the charging signal meets a second preset condition, generating a startup awakening signal; and the wake-up startup signal is sent to the main control chip of the equipment through the second signal link to drive the equipment to be started, so that an entity on-off key does not need to be arranged, and the attractiveness of the appearance of the electronic equipment is ensured. The main control chip responds to the power supply signals and the wake-up startup signals sent by the different paths to respectively trigger different actions, and the power supply signals and the wake-up startup signals are independently generated and transmitted without influencing each other, so that the main control chip can independently execute each action.