219 results about "Signal detector" patented technology

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 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 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.

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 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 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.

A circuit test device includes a housing. The circuit test device includes a circuit disposed in the housing and including an electromagnetic field (EMF) sensor and a signal detector coupled to the EMF sensor. The circuit test devices includes a conductor disposed on the housing and an interface extending through the housing and coupling the conductor to a circuit under test (CUT). The EMF sensor is configured to generate a signal in the presence of a time varying flow of current from the CUT in the conductor, and provide the signal to the signal detector.

1. The name of the design product: physiological signal detector. 2. The use of the design product: for continuous acquisition of human motion, skin temperature, pulse, blood oxygen, electrocardiogram, electroencephalogram, ambient light, air pressure and other signals. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

There is described a device (100) for analyzing particles of a sample, the device (100) comprising: i) an electromagnetic radiation source to illuminate the sample with electromagnetic radiation to thereby generate a scattered signal; ii) a detector to detect a first component (Ivh) of the scattered signal (101), and a second component (Ivv) of the scattered signal (102); and iii) a control device configured to: a) determine (110) the depolarization ratio (Ivh / Ivv) of the sample based on the detected first component (Ivv) and the detected second component (Ivh); b) calculate (122) a polarizability (α) associated with the sample, and c) determine (120) a shape characteristic (p) of the sample particles based on the depolarization ratio (Ivh / Ivv) and the polarizability (α).

The invention relates to the field of switching power supply protection, and discloses a protection switching power supply which comprises a DC voltage module used for outputting a DC power supply voltage; the input end of the detection device is connected to the output end of the DC voltage module, and the detection device comprises a signal collector, a signal detector and a first logic output device; the signal collector is used for collecting an output voltage signal of the DC voltage module, and the signal detector is used for carrying out filtering and amplitude standardization processing on the collected voltage signal. The first logic output device is used for judging whether the voltage signal exceeds a voltage threshold value or not and judging a voltage change trend based on voltage data of a plurality of continuous sampling periods. Through the technical scheme of voltage abnormity identification and turn-off control based on voltage trend judgment, the effects of early identification and rapid protection of abnormal rise of the DC bus voltage are achieved.

The invention discloses a vacuum glass thickness measuring instrument, and relates to the technical field of vacuum glass thickness measurement, the vacuum glass thickness measuring instrument comprises a base and a PLC control system, and the top of the base is provided with a thickness measuring mechanism. When the device is used, when the laser thickness is measured, the main scattering detector rotates circumferentially to collect scattering signals generated when laser at different positions penetrates through the vacuum cavity; a forward small-angle scattering detector accurately collects small-angle area scattered light; the backward transmission signal detector collects a direct transmission light signal after the laser penetrates through the cavity, the direct transmission light signal serves as a laser energy reference value, vacuum degree misjudgment caused by laser power fluctuation is eliminated, a full-angle scattered field collection matrix is formed, and precise detection of the vacuum degree is achieved. And when the PLC control system judges that the vacuum degree is reduced, the thickness measuring mechanism is triggered at the first time to stop thickness measurement, the measurement result is judged to be invalid, and the accurate measurement result is not included.

This invention relates to a horizontal well-mounted, expandable optical fiber insertion device and its insertion method. The device includes a guide tube containing a guide head with a mounting groove. A support claw is rotatably mounted at one end of the mounting groove, and a spring is fixed to the inner side of the support claw. A sealing groove with a sealing ring is located on the outer periphery of the guide head's rear end. The middle portion of the optical fiber is fixed to the rear end of the guide head, and a steel wire rope is also fixedly mounted thereto. A pressure cap is fixed to the top of the guide tube. Both ends of the steel wire rope and the optical fiber pass through the pressure cap. Optical fiber signal detectors are connected to both ends of the optical fiber. A pressure tube is fixed to one side of the top of the guide tube, and a mud pump is connected to the other end of the pressure tube. This invention allows the optical fiber to be rapidly inserted from the surface into the bottom of a deep rock deformation monitoring horizontal well through the guide tube and securely fixed. During the safe lifting of the guide tube to the surface, the fixed guide head and optical fiber will not be pulled out, solving the problem of not being able to insert settlement monitoring optical fibers into horizontal wells.

The utility model discloses a filling mechanism of a liquid filling machine, which comprises a mounting table, the mounting table is provided with a filling mechanism, and the filling mechanism comprises a servo motor, a mounting disc, an accommodating barrel, a cylinder I, a positioning rod I, a positioning rod II, a limiting plate, a signal detector, a discharging plate, a filling assembly and a feeding assembly, the problems that due to the characteristics of the vitality agent filling bottles, the filling bottles are prone to toppling over in the filling process, so that part of the filling bottles fail in filling and need to be picked up again for filling, and the production efficiency in a factory is affected are solved.

The utility model discloses a user terminal signal detector and a user terminal signal detection system, and relates to the technical field of antenna signal detection. The user terminal signal detector comprises an RF (Radio Frequency) detection module, a forwarding module and an RF amplification module which are connected in sequence, the RF detection module is used for converting a terminal signal of a user into an analog electric signal and sending the analog electric signal to the forwarding module; the forwarding module is used for carrying out optimization processing on the analog electric signal and sending the optimized analog electric signal to the RF amplification circuit; and the RF amplification circuit is used for amplifying the optimized analog electric signal. The utility model also discloses a user terminal signal detection system. By adopting the user terminal signal detector and the user terminal signal detection system, the problem that the user terminal signal is difficult to detect in the prior art can be solved.

The invention relates to a structure analysis device (1) and to an associated method. The structure analysis device (1) comprises: a beam source (2) which generates an analysis beam (3) and is directed at a measurement point (4); a measurement signal detector (5) which detects portions of the analysis beam (3a) which are scattered or diffracted by a specimen at the measurement point (4) and converts said portions into an electrical measurement signal; and a reference signal detector (6) which detects reference radiation (3b) and converts said reference radiation into an electrical reference signal. The structure analysis device (1) also comprises electrical signal-splitting means (7) for dividing the electrical reference signal into a first and a second component, the first component having a static signal portion which substantially corresponds to the static signal portion of the electrical measurement signal, and means (8) for combining the first component with the electrical measurement signal to form an output signal (9) in such a way that respective static signal portions cancel each other out. The measurement signal detector (5) is mounted for movement with respect to the measurement point (4).

Described herein are methods and sensors for detecting a biomolecule analyte in a sample and uses related thereto. The sensor may utilise a substrate comprising a reference electrode, a counter electrode, and at least one working electrode; a sample activating composition in electrical contact with each of the electrodes and comprising a reducing agent and a complexing agent; and an electrical signal detector.

Airflow rate measuring device (100A-F) comprising an airflow rate sensing element (1) with an upstream temperature sensor (7) arranged on an upstream side of a heating element (8) and a downstream temperature sensor (9) arranged on a downstream side of the heating element (8) and designed to output an airflow rate signal based on an output signal from the airflow rate sensing element (1), wherein the airflow rate measuring device (100A-F) comprises: a signal detector (2) configured to detect that an output signal of the airflow rate sensing element (1) has exceeded a predetermined threshold; and a pulse generator (19) designed to generate a pulse signal by using an output signal of the signal detector (2) as a trigger, wherein the airflow rate measuring device (100A-F) is designed to correct an output signal of the airflow rate sensing element (1) based on the pulse signal.

The invention provides an alignment device for a mask plate, a transmission system and AOI equipment, and is characterized in that a movement module is arranged and used for controlling a to-be-aligned mask plate to rotate by a set angle; the annunciator is used for acquiring first edge information of the to-be-aligned mask before rotation, acquiring second edge information of the to-be-aligned mask after rotation by a set angle, and detecting deviation data according to the first edge information and the second edge information; and the drive controller is used for controlling the motion module to compensate the central position of the mask plate according to the deviation data so as to complete alignment. Compared with an alignment marking system of a mask pattern layer in a traditional semiconductor process device, the overall appearance center of the mask is aligned by using the change of the edge information of the mask before and after rotation, so that the detection efficiency and the detection performance are improved, the appearance size deviation range of the mask can be quickly identified and compensated, and the detection accuracy is improved. Therefore, the collision risk existing in the process of placing the mask plate into different plate boxes by the mechanical arm is avoided.

Devices, systems, and methods providing for improved detection of a high frequency component in an input signal are described. A detector includes a detector stage configured to receive an input signal and generate a detection signal that represents the input signal. The detector also includes an amplifier stage that configured to receive the detection signal from the detector stage and amplify the detection signal to generate an output signal that indicates whether the input signal includes a high frequency component. In some examples, the detector stage includes a switched cap detector and the amplifier stage includes a first switched cap amplifier and a second switched cap amplifier. In some examples, the switched cap detector and the first switched cap amplifier are operated responsive to a first clock signal, and the second switched cap amplifier is operated responsive to a second clock signal different than the first clock signal.

Techniques are provided for reduced latency look-ahead for signal detection. An example methodology implementing the techniques according to an embodiment includes down converting a digitized signal to a first baseband signal at a first decimation rate such that the first baseband signal is provided at a first latency with a first signal to noise ratio (SNR) based on the first decimation rate. The method also includes down converting the digitized signal to a second baseband signal at a second decimation rate, greater than the first decimation rate, such that the second baseband signal is provided at a second latency with a second SNR based on the second decimation rate, the second latency greater than the first latency and the second SNR greater than the first SNR. The method continues with generating a detection threshold based on the first baseband signal prior to completion of the second baseband signal generation.

A glare protecting apparatus that changes light transmittance of an LCD in order to protect eyes of an operator from light generated from a welding operation, the glare protecting apparatus comprising: a light signal detector that detects light generated during the welding operation by a photosensor; an RF signal detector that detects an RF signal generated during the welding operation via an antenna; a power supply unit that supplies a certain level of drive power to the glare protecting apparatus including the light signal detector and the RF signal detector; an RF detection power-supply switching unit; and a control unit that generates an LCD control signal.

A display apparatus and an imaging device (3). The display apparatus comprises: a liquid crystal diaphragm (2), wherein the liquid crystal diaphragm (2) comprises a plurality of liquid crystal units (20), and each liquid crystal unit (20) is configured to switch between a first state and a second state, the first state being used for transmitting light, and the second state being used for shielding light; and in the same moment, at least some of the liquid crystal units (20) in the liquid crystal diaphragm (2) are in the first state, and the other liquid crystal units (20) are in the second state; and a plurality of imaging assemblies (1), wherein the plurality of imaging assemblies (1) are located on the same side of the liquid crystal diaphragm (2), each imaging assembly (1) comprises an imaging lens group (11) and a signal detector (12), and the signal detector (12) is located on the side of the imaging lens group (11) that faces away from the liquid crystal diaphragm (2), and the signal detector (12) is used for receiving light transmitted through the liquid crystal diaphragm (2) and for converting an optical signal into an electrical signal. When different liquid crystal units (20) are in the first state, image points (S1, S2) corresponding to the same object point (S) are located at different positions of the signal detector (12), and thus the signal detector (12) can collect more complete direction information of the object point (S), so as to reconstruct stereoscopic information of the object point (S).

The present embodiments relate to a steering control device and method. A steering control device may include a communication device configured to receive a steering angle sensing signal from a steering angle sensor installed at a lower part of a rack-pinion gear, a detector configured to detect whether of an inflow of moisture into a steering device based on the steering angle sensing signal and generate moisture detection information if the inflow of moisture is detected, and a controller configured to perform a risk prevention control to prevent risk due to the inflow of moisture based on the moisture detection information.

The application discloses a kind of vacuum glass thickness measuring instrument, it is related to vacuum glass thickness measurement technical field, including base and PLC control system, the top of the base is provided with thickness measuring mechanism.The application uses, while laser thickness measurement, main scattering detector circumferential rotation is collected the scattering signal when laser passes through vacuum cavity in different positions;Forward small-angle scattering detector accurately collects small-angle region scattered light;Backward transmission signal detector collects the direct transmission light signal after laser penetration cavity, as laser energy benchmark value, eliminate the vacuum degree misjudgment caused by laser power fluctuation, form full-angle scattering field acquisition matrix, realize vacuum degree accurate detection.When PLC control system determines that vacuum degree appears drop, first time triggers thickness measuring mechanism to stop thickness measurement, and judges this time as invalid measurement result, not included in accurate measurement result.

1. The name of the design product: communication signal detector (NF-725 / 982). 2. The use of the design product: for communication signal detection. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 1 perspective view 1. 5. Design 1 is designated as the basic design.

The utility model discloses a pipeline with an optical fiber temperature monitoring function, which comprises a pipeline body, a composite enhancement layer is sleeved on the outer wall of the pipeline body, an optical fiber is spirally wound on the outer wall of the composite enhancement layer, one end of the optical fiber is connected with a wavelength division multiplexer, the wavelength division multiplexer is connected with a laser and a signal detector in parallel, and the signal detector is connected with the optical fiber. The laser and the signal detector are connected in parallel and then are connected in series with a processing module. According to the utility model, the optical fiber, the wavelength division multiplexer, the laser, the signal detector and the processing module are used to realize the temperature monitoring of the pipeline and the real-time alarm of the leakage point position of the pipeline, thereby improving the repair efficiency of the pipeline.

An apparatus for incubating the contents of a plurality of receptacles and for detecting a signal emitted by the contents of each of the receptacle includes a plurality of receptacle holders configured to incubate the contents of each a plurality of receptacles held by each of the receptacle holders. A controller is coupled to each of the receptacle holders and is configured to independently control an incubation temperature of each of the receptacle holders to independently control a temperature at which the receptacles held by each of the receptacle holders is incubated. At least one signal detector is configured to detect a signal emitted by the contents of each of the receptacles held in each of the receptacle holders, and a signal detector indexer is configured to successively optically couple each signal detector with each of the receptacles held in each of the receptacle holders to detect optical emissions from each successively coupled receptacle.