1101 results about "Signal level" patented technology

The invention discloses an oil depot full-process comprehensive management monitoring method and system, particularly relates to the field of oil depot full-process comprehensive management monitoring, and aims to solve the problems that data correlation analysis among different links is insufficient, and potential systematic risks are difficult to comprehensively identify and predict. A transfer entropy method is introduced into upstream real-time data and historical association mapping, information transmission strength between upstream and downstream key parameters is quantitatively analyzed, and an effective causal link is established; in combination with dynamic time warping and synchronous entropy correlation degree quantity, trace deviation characteristics are matched with downstream key parameter cluster information, and a deviation propagation path is accurately drawn; strictly judging a non-stationary conduction trend from the aspects of time and structure by using a multi-scale complexity increment index and cluster structure change measurement; on the basis, a mixed integer nonlinear programming optimization model is adopted, a downstream link pre-intervention strategy is quantitatively formulated, and efficient solving of parameter adjustment and early warning signal level decision is achieved.

The invention discloses an intelligent substation secondary equipment maintenance control method and system, and relates to the technical field of secondary equipment maintenance control, and the method comprises the following steps: obtaining first data of a substation to construct a static matrix, and generating a dynamic topological graph; determining the security level of the controlled equipment according to the dynamic topological graph, and establishing a priority table of mapping of the equipment type and the security level; detecting concurrent instruction conflicts through a priority table, identifying an N-order virtual loop based on a dynamic topological graph, generating a minimum isolation set, and outputting a virtual terminal isolation instruction sequence with timing constraint according to a signal level; and when the state of the maintenance pressing plate or the GOOSE link is changed, the affected equipment is positioned based on the static matrix, and incremental updating of the dynamic topological graph is controlled according to the instruction sequence. According to the method, the path optimization strategy based on the cross-interval coefficient is matched with the time window constraint, so that the maintenance efficiency is guaranteed, potential safety hazards caused by disordered operation time sequences are avoided, and the maintenance process is standardized and intelligent.

A method may include: initializing four states of a trellis, the four states corresponding to the four possible symbol levels in PAM4, where a respective initial state starts with an initial score and an empty survivor path; for respective possible transitions between the four initial states and four possible current states of the trellis, determining expected PAM4 symbols; determining error associated with respective transitions based on differences between a received PAM4 symbol and the expected PAM4 symbols; discarding transitions where the error indicates a difference greater than a single signal level, and keep the other transitions; and for respective current state groups of a two state trellis, determining one of the incoming transitions that was not discarded having the highest likelihood of being associated with a transmitted symbol.

The invention discloses a touch feedback enhanced multi-mode robot grabbing control system and method. The touch feedback enhanced multi-mode robot grabbing control system comprises a touch feedback enhancement module, a visual touch language large model semantic generation module and a touch enhancement diffusion control optimization module. The tactile feedback enhancement module is based on a multi-agent cooperation system, performs semantic level and signal level processing on tactile signals, and realizes upper and lower layer coordination through a feedback routing mechanism. And the visual touch language large model module adopts a touch encoder based on CLIP to realize multi-mode semantic conversion and material attribute identification. And the tactile enhancement diffusion control module adopts a BRIDGeR style interpolation diffusion technology, and combines visual embedding and tactile constraint to realize high-frequency optimization of an action track. According to the method, the material identification accuracy, the precision operation success rate and the complex scene self-adaptive capability are remarkably improved.

The invention provides a common-mode feedback circuit and a differential amplifier thereof, the common-mode feedback circuit comprises a sampling circuit and an amplifier circuit, the sampling circuit comprises a first input end, a second input end and a first output end, the first input end receives a first differential signal Voutp, and the second input end receives a second differential signal Voutn; the level shift module comprises a third input end, a fourth input end and a second output end, receives a common-mode signal VCMS and a reference common-mode signal VOCM output by the sampling circuit, and adjusts the common mode of the common-mode signal VCMS and the reference common-mode signal VOCM to enable the second output end to output a common-mode feedback signal VCMFB processed by the level shift module; the amplifier circuit receives a common mode feedback signal VCMFB. After the technical scheme is adopted, the same speed as that of a differential loop can be realized, the current of a main operational amplifier can be multiplexed, the power consumption of a common-mode loop is far lower than that of a main loop, and meanwhile, the common-mode level can be randomly adjusted.

The invention discloses an application method and device of a switch compatible with interconnection, a storage medium and electronic equipment, and relates to the technical field of servers, and the method comprises the steps: determining the input signal level of a target port through detecting the connection state of the target port; further, under the condition that the input signal level is the first level value, it can be determined that an input and output assembly in the switch control panel is in an equipment connection mode, and a semi-interconnection architecture mode of mounting equipment can be configured for the switch; and under the condition that the input signal level is the second level value, determining that the input and output components in the switch control panel are in the switch connection mode, thereby being capable of configuring a full interconnection architecture mode for the switches, solving the technical problem of insufficient compatibility of high-speed interconnection and flexible configuration of mounting equipment between the switches, and improving the switching efficiency. The technical effects that the port configuration can be adaptively switched according to the level of the input signal, and the semi-interconnection architecture of the mounting equipment and the full interconnection architecture between the switches are compatible are achieved.

The invention provides a leaky coaxial cable fault positioning method and system based on differential received signal strength, and the method comprises the steps: analyzing common faults of a leaky coaxial cable and the influence of the common faults on the received signal strength in combination with the distribution of wireless base stations and the transmission characteristics of the leaky coaxial cable; the method comprises the following steps: detecting the received signal strength of a leaky coaxial cable in real time by using a mobile terminal, carrying out equidistant sampling according to train position information, or sampling at equal time intervals when no position information exists, and uploading the current received signal strength information to an operation and maintenance center; the operation and maintenance center carries out differential processing on the collected signal intensity data, and the signal level attenuation rate is kept constant under the fault-free condition; and when the fault occurs, the signal level attenuation rate is obviously changed at the fault point, so that accurate fault positioning is realized. According to the invention, the construction and maintenance cost of leaky coaxial cable fault detection equipment can be obviously reduced, and the precision and efficiency of leaky coaxial cable fault positioning are greatly improved.

The invention provides a GNSS deception jamming joint detection system and method, and relates to the technical field of GNSS. GNSS navigation signals are received and processed through a baseband signal processing module, and advanced, instant and lagged related function values of an I path and a Q path are generated; a signal layer index unit calculates a moving variance of a code phase difference based on the correlation function value to generate a signal layer index; the information layer index unit calculates a code carrier difference value based on the pseudo-range, the carrier frequency and the integral carrier phase to generate an information layer index; and the spoofing detection module performs data fusion on the signal layer index and the information layer index to generate a joint detection index, and judges a spoofing state through a threshold value. The distortion of an IQ code correlation value integral signal is captured through a signal layer, and on the other hand, the inconsistency of a deception signal carrier, a pseudo-range relative measurement value and a real signal is captured through an information layer, so that the technical effect of rapid complementary detection of the signal layer and the information layer on deception interference is realized.

A memory device includes a column decoder configured to decode a column address. The column decoder includes a column select driver configured to modulate a column select signal based on the column address in order to activate or deactivate a plurality of column selection circuits coupled to a column select line. The column select signal includes an activation pulse for activating the plurality of column selection circuits during an activation interval. The activation pulse includes a first portion having a positive boost signal level and a second portion having an activation signal level that is less than the positive boost signal level. The column select driver is configured to generate the first portion of the activation pulse for a first duration of the activation interval, and, following the first duration, generate the second portion of the activation pulse for a second duration of the activation interval.

The present application provides a complex programmable logic device (CPLD)-based data processing method and system, and a computing device. The CPLD is arranged on a hard disk backplane of a server, and the hard disk backplane supports a universal backplane management (UBM) protocol; the hard disk backplane comprises an HFC connector for connecting to a RAID controller and a DFC connector for connecting to a hard disk slot, and the CPLD is connected to the HFC connector and the DFC connector, respectively. The method comprises: when a hard disk is inserted into the hard disk slot, determining an interface type of the hard disk according to a signal level transmitted by the DFC; processing interaction data between the RAID controller and the hard disk according to the hard disk interface type, wherein the interaction data comprises data indicating the hard disk interface type, data indicating a hard disk state and read / write operation command data; and transmitting the processed data to the RAID controller or the hard disk so as to achieve hard disk management, wherein the hard disk comprises a hard disk of an SAS / SATA / NVME interface type. In this way, new logic functionality is added to an existing logic chip of the hard disk backplane to achieve the functionality of the UBM protocol.

A smoke detection device comprises a housing, a control unit with a power unit, and a scattered light sensor. The sensor comprises an optical chamber having a first emitter, a second emitter, and a photoreceiver therein. The optical chamber is within a filtration chamber having output openings that are coupled to the optical chamber via a labyrinth that terminates as a ring slit between the optical chamber and the filtration chamber. The control unit constantly provides power impulses to the first emitter, and connects the second emitter to the power unit at a moment when a threshold signal arises at the photoreceiver, determines signal levels of the photoreceiver that arise during providing of the power impulses to the first and the second emitters, and initiates an alarm if the level within the second emitter connection period is at least 20% greater than the level within the first emitter connection period.

To implement a single-exposure HDR function with a simple circuit configuration without increasing noise.An imaging device includes: a first comparison circuit that outputs a first signal according to a result of comparison between signal levels of a first input signal and a first reference signal corresponding to a first gain; a second comparison circuit that outputs a second signal according to a result of comparison between a second input signal and a second reference signal corresponding to a second gain having an amount of gain different from that of the first gain; and a third comparison circuit that outputs a third signal according to a result of comparison between signal levels of the first signal and the first input signal, and a fourth signal according to a result of comparison between the second signal and the second input signal, at timings different from each other.

This disclosure provides methods, devices, and systems for audio signal processing. The present implementations more specifically relate to speech enhancement techniques that are agnostic to varying signal levels in near-end audio signals. In some aspects, a speech enhancement system may include a delay estimator, an input normalizer, and an acoustic echo and noise (AEN) decoupling filter. The delay estimator receives a near-end audio signal via a microphone and a far-end audio signal for output via a speaker and estimates a reference audio signal based on a delay between the near-end audio signal and the far-end audio signal. The input normalizer normalizes a loudness of the near-end audio signal and the reference audio signal. The AEN decoupling filter determines a set of masks based on the normalized audio signals and suppresses an echo component and a noise component of the near-end audio signal based on the set of masks.

The invention relates to a high-voltage level shift circuit and a layout structure thereof, and the high-voltage level shift circuit comprises a pulse generation module which is used for receiving an input signal and generating a double-path low-voltage domain narrow pulse signal; the level shift module is used for receiving the low-voltage domain narrow pulse signal and converting the low-voltage domain narrow pulse signal into a corresponding double-path high-voltage domain narrow pulse signal; the voltage transient noise detection module is used for detecting voltage transient noise and generating a transient noise intensity signal; the voltage transient noise filtering module is used for filtering voltage transient noise based on the received transient noise intensity signal to generate a double-path high-voltage domain filtering signal; and the RS trigger is used for converting the received high-voltage domain filtering signal into a high-side power device driving signal. The common-mode noise filtering capability and the VS negative bias resisting capability of the voltage transient noise filtering module can be enhanced, the transmission delay of a chip is effectively reduced, and the width of a narrow pulse signal is free of loss in the transmission process, so that the dynamic power consumption is reduced.

A reference system is provided for generating a clock signal with a tunable noise pedestal for driving a signal generator. The reference system includes a reference source configured to generate a reference signal and a multiplier chain, including a noise pedestal generator. The noise pedestal generator includes a noise pedestal attenuator configured to attenuate the reference signal to degrade a noise floor of the reference signal, a VGA configured to adjust the attenuated reference signal to a desired signal level, a bandpass filter configured to filter out excess noise from the adjusted reference signal to form a noise pedestal, and a switch arrangement configured to selectively input the reference signal to a first path including the noise pedestal attenuator and the VGA, and a second path bypassing the noise pedestal attenuator and the VGA. The clock signal includes the noise pedestal when the first path is selected.

The invention discloses an electric energy quality data monitoring method, and relates to the technical field of electric power system monitoring and analysis, and the method comprises the following steps: S1, obtaining an original voltage and current waveform set; s2, performing time-frequency domain decomposition by using the waveform set; s3, performing feature fusion by using the feature component set; s4, performing time serialization by using the electric energy quality index set; and S5, performing multi-dimensional structured integration by using the time sequence index data. By setting a voltage and current characteristic component coupling mechanism, unified expression of voltage and current characteristics can be ensured on an original signal level, and fine-grained description of electric energy quality characteristics is realized in an index calculation link, so that the problems of data dimension separation and insufficient index precision in the prior art are effectively solved. The method not only improves the comprehensiveness and reliability of the electric energy quality monitoring result, but also lays a solid data foundation for subsequent time serialization and structuralization integration.

An optical receiver comprises a variable optical attenuator (VOA), a photodiode (PD) which may be a pin-PD or an APD, a transimpedance amplifier (TIA), and a feedback / control circuit for adjusting a bias voltage of the VOA in response to an optical input signal level, to provide an attenuated optical output signal to the PD having a narrower dynamic range. Providing signal level adjustment in the optical domain mitigates the requirement for a TIA with a large dynamic range and provides for fast switching. The optical receiver may comprise a waveguide configuration, wherein a first electro-absorption modulator (EAM) is operable as the VOA and a second EAM is operable as the photodiode. A monolithically integrated electro-photonic circuit comprising the VOA, PD, TIA and feedback / control circuit may be provided using InP-based semiconductor materials.

The invention belongs to the technical field of integrated circuit testing, and particularly relates to an FPGA software and hardware cooperation testing platform based on a BFM. The test platform is formed by connecting a BFM with a Testbench, an AXI bus, an off-chip DDR and a DUT. The test process comprises the steps that the Testbench issues parameters through a transaction function interface, the BFM reads an excitation vector from the off-chip DDR / on-chip BRAM through an Avalon main interface, adaptive transmission of a system bus clock domain and a DUT clock domain is completed through double asynchronous FIFO (SNDfifo / RECfifo), and signal level interaction with the DUT is achieved through a pin protocol interface; the state machine dynamically switches long and short simulation modes according to the vector length, and drives the output vector to be written back and stored; the error monitoring unit monitors data flow faults in the whole process and outputs seven types of error reporting codes. The simulation equivalent frequency reaches a 10 megahertz level, and the method is suitable for efficient verification of the digital IC.

A test and / or measurement system includes a signal generator circuit, wherein the signal generator circuit includes a processing circuit. The processing circuit is configured to generate and / or process a predetermined waveform, wherein the predetermined waveform includes at least one critical portion. The processing circuit is configured to control the signal generator circuit to generate a radio frequency, RF, signal, based on the predetermined waveform, wherein the generated RF signal includes the predetermined waveform. The processing circuit is configured to adapt operational parameters of the signal generator circuit such that a signal level of the at least one critical portion of the RF signal generated fulfills at least one predefined criterion.

In one embodiment, a method includes: receiving, in a level shifter, an input signal from a first voltage domain that operates according to a first supply voltage; level shifting the input signal to at least one level-shifted signal having a second voltage greater than the first supply voltage; based on the at least one level-shifted signal, generating a first pulse signal and a second pulse signal; latching the first pulse signal through a latch circuit to form an output signal; and outputting the output signal to a second voltage domain, the second voltage domain to operate according to a second supply voltage greater than the first supply voltage.

Techniques for selecting frequencies of operation are described. HF signals may land at the receiver node with power levels dependent upon the transmit frequency. The frequency with the highest power level at the receiver node may be selected when the receiver node is not subject to interfering. The receiver node may be unable to receive a desired signal if an interfering signal has a signal level which is higher than the desired signal. The transmitter node may select a frequency which has a receiver signal level which is higher than the interfering signal for the selected frequency. The receiver node may then receive the transmit signal at the selected frequency even when subject to interfering from the interferer node.

A memory device includes a plurality of memory cells. Each memory cell stores a plurality of signal levels representing a plurality of values corresponding to a respective plurality of bits, bits in corresponding respective positions of significance across the plurality of memory cells constituting respective memory pages of the memory device. The memory device also includes decoding circuitry to decode each bit value of one of the respective memory pages using bit values read from at least one other one of the respective memory pages, adjacent to the one of the respective memory pages. The plurality of signal levels may represent the plurality of values according to a Gray code. The decoding circuitry may be configured to compare each signal level to a set of voltage thresholds, and to decode a subset of the plurality of signal levels using fewer than all voltage thresholds in the set of voltage thresholds.

The invention discloses an elevator environment abnormity monitoring method and system, and the method comprises the steps: collecting environment data in a lift car in real time through a multi-mode sensor array, and generating a dynamic environment characteristic spectrum; based on the dynamic environment characteristic spectrum, outputting an environment health index with high confidence; generating a partition abnormal probability thermodynamic diagram according to the environmental health index and the passenger density detection data; based on the partition anomaly probability thermodynamic diagram, the real-time environment parameters, the partition anomaly probability thermodynamic diagram and risk early warning prompts are displayed on a car display screen in an overlapped mode; and according to the duration time and the spatial diffusion trend of the partition abnormal probability thermodynamic diagram, an environment deterioration early warning signal is generated through a space-time prediction model, and when the level of the environment deterioration early warning signal reaches a preset signal level, a gradient alarm mechanism is triggered, and a building management system is linked to adjust an elevator scheduling strategy. According to the embodiment of the invention, the accuracy and response efficiency of elevator environment safety management can be improved.

The invention discloses a vehicle laser radar and camera combined external parameter calibration method and system, and the method comprises the steps: obtaining laser point cloud information, video information, radar point cloud information, differential positioning information, navigation information and vehicle attitude information in the driving process of a target vehicle; the information is subjected to time synchronization and information alignment of a signal level based on a gPTP protocol, information type fusion, attribute fusion, topology fusion and logical reasoning are carried out, target parameter information is obtained, finally, the target parameter information serves as a true value control group to be compared with initial external parameter calibration parameters of a target vehicle, and the target parameter information is obtained. Invalid values in the initial external parameter calibration parameters are screened out, and the combined external parameter calibration parameters are obtained. According to the method, the combined external parameter calibration of the vehicle laser radar and the camera can be realized in the driving process, and when the position of the intelligent driving sensor on the target vehicle deviates, deviation compensation can be carried out through non-inductive real-time external parameter calibration, so that the vehicle use experience of a user is improved.

An analog-to-digital converter (ADC) includes a first digital-to-analog converter (DAC) configured to change a signal level of a first node based on a first and second input analog signals, a second DAC configured to change a signal level of a second node based on one of the first input analog signal and the second input analog signal, a comparator configured to compare the signal level of the first node and the signal level of the second node, and a controller configured to generate a first digital value for the first DAC and a second digital value for the second DAC based on an output of the comparator during a first conversion phase corresponding to a first sampling phase, input the first digital value into the second DAC before a second sampling phase, and input the second digital value into the first DAC before the second sampling phase.

The invention discloses a steel structure construction safety risk dynamic assessment method and system based on artificial intelligence. The method comprises the steps of obtaining a multi-dimensional data set in real time; based on the multi-dimensional data set, a deep learning algorithm is adopted to fuse an image and a sensor signal, a structure defect is accurately identified, and a defect feature vector is extracted; when the defect feature vector exceeds a preset threshold value, a machine learning classifier is introduced to construct a risk assessment model, classification quantification of defects is realized, and an initial risk level is output; for the initial risk level, analyzing the space-time fusion data by using a probability state transition model, simulating the dynamic evolution trend of the risk and judging the stability of the risk; a mapping model is constructed based on a virtual simulation technology, dynamic simulation deduction is carried out on risk changes, and a visual visualization report and a graded early warning signal level are generated. According to the invention, full-chain intelligent closed loop from defect perception to risk prospective early warning is realized, and the safety management and control level and accident prevention capability of a construction site are greatly improved.

A system for evaluating an ear seal between an earphone of a hearing device and an ear canal includes a first transducer configured to play a sound in response to an electrical signal including a reference frequency component and a test frequency component below the reference frequency. A second transducer receives the sound in the ear canal. A controller is configured to calculate at least one electrical signal level difference between the reference frequency component and the test frequency component of the electrical signal, measure the sound levels of the reference frequency component and the test frequency component of the sound in the ear canal, calculate an acoustic signal level difference between the measured sound levels of the reference frequency component and the test frequency component, calculate a normalized acoustic difference value by subtracting the electrical signal level difference from the acoustic signal level difference, and determine a measurement result of the ear seal based on the normalized acoustic difference value.

The invention provides a knob dimming method which comprises the following steps: S1, when a falling edge is detected in each interruption of a program, performing input falling edge interruption on a pin A, and then starting a timer; s2, judging whether the timing time of the timer is up or not, if not, returning to S1, and if so, reading the signal level of the pin A; and S3, judging whether the signal level of the pin A read in S2 is a low level or not, if not, returning to S1, and if so, judging that the level of the pin A is valid. According to the invention, the effective level can be rapidly obtained after the level recovers to be stable, the maximum delay time or pulse period is not measured again by means of device replacement, the knob level is read by dynamically setting timing, misjudgment is greatly avoided, and in addition, the problem of pulse signal counting coverage caused by rapid rotation of the knob is also solved.

An illumination device includes: a light source part emitting light; a light distribution shape setter setting a light distribution shape of light from the light source part; a storage storing therein light distribution shape data related to the light distribution shape; and a controller controlling the light distribution shape setter based on the light distribution shape data. Further, the light distribution shape setter sets the light distribution shape based on a signal level input from the controller, and when changing the signal level input to the light distribution shape setter from a first level to a second level, the controller changes the signal level from the first level to a third level that is a level between the first level and the second level, and changes the signal level from the third level to the second level after maintaining the third level for a predetermined time period.

The invention relates to the technical field of electromagnetic environment monitoring, in particular to a radio electromagnetic environment real-time monitoring system based on urban traffic, which comprises a signal acquisition module, a grid compression module, a signal processing module, a signal positioning module and a situation filling module. According to the method, the signal acquisition frequency is dynamically adjusted, the data redundancy problem in the high-speed moving scene is optimized, the local signal capturing capability is improved, the plane coordinate system is utilized to divide grids, normalization processing is combined, the data storage pressure is reduced, the feature integrity is guaranteed, the threshold line is dynamically generated by adopting the moving average algorithm, and the data storage efficiency is improved. The method improves the signal-noise separation precision, reduces the misjudgment rate, corrects a signal level value in combination with the vehicle position and the grid center distance, reduces the positioning error of a signal source, adjusts the fitting weight in combination with the geographic feature gradient and the building height parameter, reduces the data distortion and the electromagnetic situation map blind area, and improves the positioning accuracy. And high-precision and low-delay panoramic monitoring of the electromagnetic environment in a complex urban area environment is realized.