431 results about "Signal detector" patented technology

Systems and methods are provided for multi-domain vulnerability assessment. An exemplary system includes a plurality of wireless signal detectors, wherein each of the wireless signal detectors is configured to detect wireless signals of a respective wireless signal protocol of a plurality of wireless signal protocols. The wireless signal detectors transmit the signal data to a data processor that classifies the plurality of devices based on the wireless signal data, determines one or more device vulnerabilities associated with the plurality of devices based on the classification of the plurality of devices, and determine a plurality of device risks for the plurality of devices based on the plurality of device vulnerabilities.

The invention discloses an inter-satellite laser communication load on-orbit receiving and transmitting optical axis coaxial self-calibration device and method, and belongs to the field of inter-satellite laser communication. Comprising a cube-corner prism, a coarse pointing mechanism, a beam expanding group lens, a color separation sheet, a fast reflecting mirror, a communication signal light emitting system, an optical filter, a light splitting sheet, an optical filter, a signal focusing mirror, a communication signal detector, a tracking focusing mirror and a tracking signal detector. Under the condition that beacon light is not used and a laser source is not additionally added, communication signal light is directly adopted to calculate and compensate the offset between the receiving optical axis and the transmitting optical axis through the cube-corner prism, the on-orbit alignment capture time is greatly shortened, and the cost, power consumption, size and weight of a self-calibration device are reduced.

The invention relates to the technical field of underwater acoustic communication and signals, and discloses an impulse noise parameter estimation method based on a hybrid neural network, which comprises the following steps of: 1, constructing a nonlinear mapping model of non-Gaussian parameter estimation; 2, establishing a noise sample database; step 3, establishing a noise parameter estimator based on the hybrid neural network; 4, network training and online deployment: respectively carrying out network training through the noise training sample set, storing network parameters after network training, and carrying out online deployment application; step 5, receiving an actually measured noise sample, performing parameter off-line estimation to obtain a noise parameter, and feeding back the noise parameter to a communication receiver; sixthly, the communication receiver designs a signal detector through the received noise parameters, and the signal detection effect under the impulse noise is optimized; according to the scheme, small-sample, rapid and accurate parameter estimation is realized by using the hybrid neural network, and the method is suitable for effective deployment of a noise parameter estimation module of a communication system under impulse noise.

A multi-source water pollutant detection device based on multi-dimensional spectral information fusion comprises a base, a light shield, an electric signal detector, an absorption and fluorescence generation mechanism and a light filtering and light transmitting mechanism, the absorption and fluorescence generation mechanism and the light filtering and light transmitting mechanism are oppositely arranged on the base, and the light shield covers the base; the light filtering and transmitting mechanism comprises a plurality of light filters, through holes, light filter mounting fixing parts and photoelectric sensors; the photoelectric sensors are used for converting fluorescence signals filtered by the corresponding light filters and transmission light signals passing through the through holes into electric signals; the photoelectric sensors are connected with the electric signal detector; the absorption and fluorescence generation mechanism comprises a sample bin and a light source irradiation part for irradiating light sources with different wave bands in the sample bin, and a focusing part is arranged on the sample bin and used for focusing transmission light and fluorescence generated after irradiation and absorption of the light sources with the corresponding wave bands and irradiating the transmission light and the fluorescence to the through hole in the light filter mounting and fixing part and the light filter. According to the utility model, the advantages of absorption spectrometry and three-dimensional fluorescence spectrometry are fused, and rapid detection of pollutants is realized.

The invention relates to the technical field of atomic frequency standards, in particular to a miniaturized atomic beam clock physical system and a clock generation method. The atomic beam clock physical system comprises an alkali metal atom emission cavity, an alkali metal raw material block, a microcapillary array, a drift cavity, a multi-layer silicon substrate, a laser, an optical fiber type phase modulator, a beam splitter prism, a plurality of reflectors and a signal detector. Compared with a traditional coherent population detection mode based on a bubble chamber, the chip-scale atomic clock has narrower fluorescence spectrum width and higher long-term frequency stability, meanwhile has the chip-scale capability, and has higher competitiveness compared with an existing chip-scale atomic clock based on an air chamber structure.

Various embodiments disclosed by the present invention include an exemplary system for remotely testing the continuity of electrical wiring, an electric vehicle charging system, and a charge coupler for an electric vehicle charging system. In an exemplary embodiment, the system for remotely testing the continuity of electrical wiring includes a signal generator configured to generate a signal having a predetermined frequency. A controlled impedance network is configured to attenuate the signal. The controlled impedance network can be electrically connected towards a first end of the electrical wiring, which is terminated at a terminal at the first end and can be electrically connected to the signal generator at a second end to carry the signal. A signal detector is configured to detect the signal.

The utility model relates to the technical field of electric power emergency communication, in particular to a portable electric power emergency communication transmission device. According to the technical scheme, the device comprises a storage box, a signal transmission mechanism and a lifting seat, a rotating disc is rotationally installed at the top in the lifting seat, a gear ring is fixedly installed at the bottom of the outer side of the rotating disc, a fluted disc is installed on one side of the gear ring in a meshed mode, a servo motor is fixedly installed at the top of the fluted disc, and the signal transmission mechanism is fixedly installed at the top of the rotating disc. According to the utility model, the servo motor is electrified to operate, the fluted disc is matched with the meshed gear ring to drive the turntable to rotate, the rotating turntable can adjust the signal receiving direction of the signal transmission mechanism, and meanwhile, the signal transmission mechanism transmits a received electric signal to the signal detector for calculation; and the direction of the signal transmission mechanism is adjusted according to the signal intensity calculated by the signal detector, so that the function of automatically adjusting the signal transmission mechanism to receive the signal at the maximum intensity is realized, and the stability of signal receiving is ensured.

The present application discloses a UWB signal-based vehicle monitoring method. The vehicle monitoring method comprises the following steps: signal transmission: transmitting a series of UWB signals by means of a UWB signal detector; signal reception: receiving, by means of the UWB signal detector, a UWB signal reflected back from a target object; signal analysis: analyzing, by means of a UWB signal processor, the received UWB signal to obtain monitoring data reflecting a state of the target object; and determination processing: on the basis of the monitoring data, generating a control signal by means of a system controller, and controlling a working state of a vehicle monitoring system by means of the control signal. The vehicle monitoring method of the present application enables effective perception and dynamic response to target objects around a vehicle body, improving real-time performance and accuracy of vehicle monitoring, and enhancing driving safety and system reliability.

The invention discloses a light-sensing external trigger signal output device for laser far-field parameter analysis, comprising: a light signal detector, used for collecting laser signals irradiated on a target plate and outputting a pulse current signal; a signal primary amplification module, used for converting the pulse current signal into a pulse voltage signal and amplifying the pulse voltage signal; a signal superposition amplification module, used for amplifying the pulse voltage amplification signal output by the signal primary amplification module again; a laser pulse signal judgment module, comprising a comparator, used for setting a signal judgment threshold value, the comparator being connected to a monostable trigger, and the monostable trigger sending a trigger signal when the pulse signal is greater than the signal judgment threshold value set by the comparator; an MCU main control module, used for interrupt processing, trigger signal delay and output frequency setting, trigger signal output and transmitting a timing control signal to an imaging camera; a power management module, connected to an external power supply and supplying power to the remaining modules.

To measure battery performance by a simple method.SOLUTION: A control unit 16 causes a damping vibration circuit 12 to generate a damping vibration current by controlling a switch SW. The control unit 16 acquires a damping vibration signal related to the time waveform of the damping vibration current from a signal detector 14 and obtains a real part of impedance of a battery 10. The control unit 16 acquires each sample value at a plurality of sample times obtained by operation of a calibration mode from the time waveform indicated by the damping vibration signal, and obtains the real part of impedance of the battery 10 on the basis of each sample value. The control unit 16 operating in the calibration mode causes the damping vibration circuit 12 to generate the damping vibration current by controlling the switch SW. The control unit 16 acquires a damping vibration signal for calibration related to the time waveform of the damping vibration current and obtains a plurality of positions on the time axis at which the time waveform indicated by the damping vibration signal for calibration becomes maximum, or a plurality of positions on the time axis at which the same becomes minimum, as the plurality of sample times.SELECTED DRAWING: Figure 1

The invention discloses a vehicle monitoring system based on a UWB signal and a vehicle, and the system comprises at least one UWB signal detector which is disposed on a vehicle body and is used for transmitting and receiving a UWB radio frequency signal; the UWB signal processor is used for analyzing the received UWB radio-frequency signal so as to obtain monitoring data reflecting the condition of the target object; the vehicle video monitoring system comprises at least one video recording system; and the system controller is in communication connection with the UWB signal processor and the video recording system, and the system controller is used for generating a control signal according to the monitoring data so as to control the video recording system to be in a working or dormant state. The vehicle monitoring system can automatically control the starting or dormancy of the video recording system according to the condition of the target object around the vehicle, the power consumption of the system can be greatly reduced, the cruising ability of the vehicle is improved, meanwhile, it is ensured that key image information can be captured at a key moment, and organic combination of high efficiency, intelligence and practicability is achieved.

The purpose of the present disclosure is to provide a defect inspection device with which it is possible to suppress variation in an output signal occurring when an imaging operation condition for an image sensor is changed. The defect inspection device according to the present disclosure comprises a detector that outputs a detection signal for signal light generated by irradiating a sample with light. The detector is controlled so that a first operation state of the detector in a first signal acquisition condition and a second operation state of the detector in a second signal acquisition condition are the same.

The invention discloses a system and a method for testing thermal cycle characteristics of multidirectional horizontal pipelines of a nuclear power plant, the system comprises a circulating water path and a pressure stabilizing water path, the circulating water path comprises the multidirectional horizontal pipelines (1a, 1b), paired pressure signal detectors (17a, 17b), pipeline heaters (14a, 14b, 14c) and a pipeline heat exchanger (3), and the pressure stabilizing water path comprises a cooling water supply system (18) and a pressure stabilizer (23); the circulating water path is communicated with the pressure stabilizing water path, and the number of the multi-direction horizontal pipelines (1a and 1b) is more than two. The thermal cycle characteristics of the upstream horizontal pipeline, the lateral horizontal pipeline and the downstream horizontal pipeline connected with the main pipeline under the conditions of different temperatures, pressures and volume flows can be researched more effectively, conveniently and accurately, and data support and reference are provided for design optimization of the multi-direction horizontal pipeline of the nuclear power station.

1. Name of the design product: Signal detector. 2. Use of the design product: For signal detectors. 3. Design key points of the design product: Lies in the shape. 4. Picture or photo that best shows the design key points: Perspective view.

The invention provides a gas flow field pressure measuring method and device based on a laser spectrum, which can be applied to the technical field of laser and the technical field of pressure measurement. The method for measuring the flow field pressure based on the laser spectrum comprises the following steps: emitting first laser to a to-be-measured gas flow field by using a laser, so as to induce the to-be-measured gas flow field to emit a filament signal through interaction between the to-be-measured gas flow field and the first laser; performing extraction processing on the light filament signal by using a signal detector to obtain target light intensity information corresponding to the to-be-detected gas flow field; according to a preset light intensity pressure calibration curve, performing inversion analysis on the target light intensity information corresponding to the to-be-measured gas flow field to obtain the target pressure of the to-be-measured flow field, the light intensity pressure calibration curve is established according to different gas pressures and spectral signals obtained after gas flow fields under different gas pressures are induced by laser.

The embodiment of the invention discloses an optical fiber connection detection system, method and device, a detector and a fiber clamping device.The optical fiber connection detection system comprises a signal generator, a server and the detector, the detector is installed on a first optical fiber port or the side where the first port is located, and the signal generator and the detector are both connected with the server; the signal generator is used for generating a detection signal from the second optical fiber port or one side corresponding to the second port, and the detector is used for generating corresponding feedback information to the server when receiving the detection signal. The server establishes a mapping relation between the first optical fiber port and the second optical fiber port, or determines whether the first optical fiber port and the second optical fiber port belong to the same optical fiber or are on the same optical fiber link according to the feedback signal; the problems of network structure adjustment and label nonstandardization caused by service development are effectively solved. By means of intelligent management, the situation that the site and information management records are inconsistent is reduced, and powerful support is provided for potential tapping of idle resources and quick service opening and maintenance.

The invention relates to the technical field of direct current systems, in particular to a double-magnetic-core current detection structure and a current detection method. The method comprises the following steps: acquiring an induced electromotive force signal detected by a signal detector in the dual-magnetic-core current detection structure in claim 1; and performing residual current demodulation on a second harmonic component signal in the induced electromotive force signal to obtain a residual current signal in the line to be detected. According to the invention, accurate detection of the milliampere-level tiny residual current is realized under a large-current working condition through the double-magnetic-core current detection structure and the current detection method, and a milliampere-level direct-current residual current signal is modulated to a high-frequency carrier wave by using a magnetic modulation principle, so that the signal-to-noise ratio is remarkably improved, and the detection precision is improved. The problem of detecting tiny signals under the background of large signals is solved.

The invention discloses an oil and gas pipeline sand content test sound wave optical fiber sensor, and particularly relates to the technical field of sensors, which comprises a rare earth doped silicon dioxide optical waveguide sheet, a vibration transduction structure, a phase shift waveguide grating and a phase shift wave. The device further comprises a photoelectric converter, a signal amplifier, a filter, a fragrance clamping filter and a vibration signal detector. The rare earth doped silicon dioxide waveguide sheet is located on the vibration transduction structure, and the phase shift waveguide grating is inscribed in the rare earth doped silicon dioxide waveguide sheet. The micro-vibration optical chip sensor based on the photoacoustic spectrum is simple and firm in structure, easy to manufacture and convenient to integrate with other systems, and the problem of integration of a traditional optical fiber distributed sensing system can be effectively solved.

The invention discloses a rectangular waveguide sealing window structure for realizing broadband transmission, which belongs to a microwave signal detection device and comprises a first rectangular waveguide cavity, a second rectangular waveguide cavity and a rectangular dielectric block arranged between the first rectangular waveguide cavity and the second rectangular waveguide cavity, the first rectangular waveguide cavity comprises a first rectangular waveguide shell and two first stepped transition structures embedded into an inner cavity of the first rectangular waveguide cavity, and the second rectangular waveguide cavity comprises a second rectangular waveguide shell and two second stepped transition structures embedded into the second rectangular waveguide shell. The opposite side faces of the two first stepped transition structures and the two second stepped transition structures are provided with identical tooth-shaped steps, the second rectangular waveguide shell is further internally provided with an installation cavity communicated with the second I-shaped sliding groove, the two waveguide cavities are connected through screws, and the rectangular dielectric block is fixedly installed in the installation cavity. The vertically symmetrical multi-stage stepped impedance matching network provided by the invention realizes excellent transmission performance with low voltage standing-wave ratio in a wide frequency band, and is suitable for a millimeter wave system with high power and wide frequency band.

The invention discloses a low-altitude logistics unmanned aerial vehicle anti-interference system, and the system comprises an environment sensing module which comprises a global sensing monitoring module, an intelligent analysis module and decision module, a multi-level anti-interference execution module, and a continuous optimization module; the global sensing monitoring module comprises a basic monitoring module and an enhanced monitoring module, the basic monitoring module comprises an electromagnetic spectrum sensor, a GNSS signal detector, a laser radar, a meteorological sensor and an unmanned aerial vehicle state sensor, and the enhanced monitoring module comprises an SDR spectrum analysis unit and an environment database access module; and the intelligent analysis module and decision module comprises an interference identification and risk quantification module and a decision verification module. The invention aims to provide the low-altitude logistics unmanned aerial vehicle anti-interference system, so as to solve the problems that the unmanned aerial vehicle only depends on a traditional electromagnetic sensor to identify fixed frequency band interference in low-altitude flight, so that missed judgment and misjudged judgment are caused, and the unmanned aerial vehicle is not influenced. And excessive response or insufficient response can be solved.

An integrated EEG-fNIRS neurofeedback system for interacting with participant's brain activity includes EEG electrodes, fNIRS detectors, at least one information receiver, a computation module, and a report generator. The EEG electrodes collect EEG signals. The fNIRS detectors collect fNIRS signals. The at least one information receiver receives and processes the collected EEG and fNIRS signals. The computation module executes an EEG and fNIRS signal processing pipeline with the EEG electrodes, the fNIRS detectors, and the information receiver. The computation module is further configured to: calculate score information based on received EEG and fNIRS signals; select a minimum score from the calculated score information; and discard an alternative score that is not selected as the minimum score, so as to enable the computation module to choose a single representative score for the shared target objective from both EEG and fNIRS signals. The report generator provides a report of the selection.

This application is directed to controlling a low power mode of a data communication channel. An electronic device includes an input interface for receiving an input signal. A signal conditioning circuit is coupled to the input interface, and configured to be disabled and consume power below a first threshold power level in a low power mode. A first signal detector is coupled to the signal conditioning circuit, and a second signal detector is coupled to the first signal detector. The first signal detector is configured to monitor a differential mode component of the input signal for controlling the signal conditioning circuit to exit the low power mode. The second signal detector is configured to, in the low power mode, detect a start of the input signal and enable the first signal detector based on a common mode component of the input signal.

The invention discloses a non-intrusive wood internal cavity detection method based on Transform framework constraint. A plurality of signal detectors on a stress wave sensor are uniformly distributed around the same horizontal section of the surface of a forest; sequentially knocking each signal detector by using an electronic hammer, wherein a stress wave signal generated by each signal detector is received by the signal detectors at other positions; the signal processor calculates the stress wave speed information transmitted among the signal detectors, and visualizes a stress wave speed radiation diagram by using RGB (Red, Green, Blue) colors; correcting each wave velocity ray in the stress wave velocity ray diagram to obtain a corrected stress wave ray diagram; and inputting the corrected stress wave signal into a cavity identification model for processing, and outputting the position and the size of a visual forest cavity with defects. According to the method, accurate feature extraction of the stress wave signals is realized, the internal relation between the stress wave signal features is analyzed, and accurate detection of the forest internal cavity defect detection sensor is realized.

The embodiment of the invention provides an analog-to-digital converter, an electric quantity detection circuit and a battery management system. The analog-to-digital converter comprises a modulator, a digital filtering module, a signal detector and a selection circuit, the modulator is used for quantizing an input signal to output a quantized signal; the digital filtering module is connected to the modulator and is used for filtering the quantized signal; wherein the digital filtering module comprises at least two digital filters; the signal detector is used for detecting a signal parameter of the input signal, and the signal parameter comprises a frequency fluctuation degree and / or amplitude of the input signal; and the selection circuit is connected to the digital filtering module and the signal detector, and is used for adjusting the order of the digital filtering module according to the signal parameters. According to the analog-to-digital converter provided by the embodiment of the invention, different types of input signals can be adapted, so that optimal configuration of the different types of input signals is realized, and rapid and high-precision measurement is achieved.

The invention relates to an interference type sensing device for multiplexing and a demodulation system and method, the sensing device is formed by sequentially connecting a plurality of interference type sensing units in series, and each interference type sensing unit is characterized in that two input ends of a circulator are respectively connected with an F-P cavity optical fiber sensor and a linear chirp fiber grating sensor, and an output end of the circulator is connected with a coupler; the reflection bandwidth of the fiber bragg grating of the linear chirped fiber bragg grating sensor just covers one period of the reflection spectrum of the F-P cavity, and the reflection wavelength ranges of the fiber bragg gratings of the plurality of interference type sensing units are not overlapped. The demodulation system comprises a broadband light source, an interference type sensing device and a signal detector. According to the invention, real-time measurement of a plurality of sensors on one optical fiber is realized, the multiplexing capacity is improved, the structure of a detection and demodulation system is simplified, the number of required optical fibers is reduced, and the complexity of the system is reduced.

The invention belongs to the technical field of security and secrecy, and particularly relates to a vehicle secrecy technology detection method and system based on a shielding tent. Constructing a signal isolation environment in the electromagnetic shielding tent; establishing a noise baseline model through spectral analysis; wireless terminal equipment detection is carried out through an all-standard terminal analyzer; a non-linear node detector, an infrared thermal imager, a near-field signal detector, a back scattering type X-ray machine and an endoscope are used for cooperatively scanning in different regions; and by combining algorithms such as big data and machine learning, positioning an overproof signal source, and if a suspicious device is found, disposing according to rules and obtaining evidence. According to the method, the problems of low standardization degree, high equipment false alarm rate, low implementation efficiency and low detection comprehensiveness when the vehicle is subjected to confidentiality technology detection in an open environment are solved. The method is suitable for eavesdropping, stealing and positioning device detection of secret-related vehicles.

The invention discloses a vehicle door opening early warning method and system and a vehicle, and the method comprises the steps: a plurality of UWB signal detectors arranged on a vehicle body detect UWB echo signals at the rear side of the vehicle body in real time, and the UWB echo signals are UWB signals reflected by a standard UWB signal emitted by a UWB signal emitter when the standard UWB signal encounters an object; analyzing the UWB echo signal to obtain a detection signal; the detection signal comprises the distance between a moving object corresponding to the current UWB echo signal and the vehicle body and the movement direction; when it is detected that the vehicle door state of the vehicle body is changed from the locked state to the opened state, if the detection signal represents that a moving object approaches the vehicle body at present and the distance between the moving object and the vehicle body is smaller than a preset threshold value, warning information is output according to the detection signal. According to the method, the distance and the movement direction of the moving object and the vehicle body can be accurately judged, so that accidents caused by improper door opening are remarkably reduced, the driving safety is improved, and the power consumption and the cost are relatively low.

The invention provides a chip pin multiplexing control circuit and a control method thereof, and a chip, the circuit comprises a multiplexing terminal, a chip power supply terminal, a power-on reset controller, a pin signal detector, a voltage detector and a debugging controller, the multiplexing terminal is used for receiving a general function signal and a debugging function signal; the power-on reset controller is used for sending a first enabling control signal to the pin signal detector during power-on; the pin signal detector is used for obtaining an input signal of the multiplexing terminal when enabling is confirmed according to the first enabling control signal, and sending the first control signal to the debugging controller; the voltage detector is used for detecting a voltage signal of a chip power supply terminal and sending a second control signal to the debugging controller; the debugging controller is used for confirming whether to enter a debugging mode according to the first control signal and the second control signal. By applying the chip pin multiplexing control circuit provided by the invention, the waste of chip pin resources can be reduced, and accurate identification of the debugging request signal is ensured.

The invention discloses a minimum inverse eigenvalue radar signal detection method adopting stochastic resonance preprocessing, and the method comprises the steps: carrying out the secondary sampling of a received signal, compressing the frequency of the signal to match a stochastic resonance system, and expanding the adaptability of the stochastic resonance system to a higher-frequency signal. Then performing stochastic resonance preprocessing on the signals, enhancing signal energy under a low signal-to-noise ratio to obtain processed signal information, sending the processed signals to a CFAR signal detector, constructing a covariance matrix of the signals of the reference unit and the detection unit, performing eigenvalue decomposition on the covariance matrix to obtain a minimum inverse eigenvalue, and finally obtaining a minimum inverse eigenvalue; the minimum inverse feature value of the detection unit is compared with the average minimum inverse feature value of the reference unit to determine the existence problem of the signal. According to the method, the problems that a matrix constant false alarm detector based on the maximum characteristic value is easily influenced by noise uncertainty and a constant false alarm detector based on information geometry has relatively high calculation complexity are solved.

According to an aspect of an embodiment, an optical network unit (ONU) in a passive optical network (PON) may comprise a physical media dependent (PMD) receiver, a detector, and a processing device. The PMD receiver may be configured to receive a downstream signal from an optical line terminal (OLT). The detector may be configured to measure a link quality parameter in the downstream signal. The processing device may be configured to identify a link quality parameter target, wherein the link quality parameter target is a value that achieves a target error probability. The processing device may be configured to compute a link quality parameter margin between the measured link quality parameter and the link quality parameter target, and adjust a transmission parameter based on the link quality parameter margin.