120 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 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 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.

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 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.

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.

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.

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.

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.

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.

The utility model discloses a kind of efficient ultraviolet fluorescence collection imaging systems, including imaging lens sleeve, still including fluorescence signal detector, second ultraviolet lenticular lens, first ultraviolet lenticular lens and spherical mirror sequentially arranged, imaging lens sleeve two ends are light inlet end and light outlet end respectively, first ultraviolet lenticular lens is arranged at the light inlet end of imaging lens sleeve, second ultraviolet lenticular lens is arranged in imaging lens sleeve, the focal length of first ultraviolet lenticular lens between first ultraviolet lenticular lens and spherical mirror coincides with the curvature center of first ultraviolet lenticular lens.The utility model is combined by increasing spherical mirror and conventional imaging lens, increase the solid angle of fluorescence collection, thereby improve the collection efficiency of fluorescence;The length of imaging system is adjustable, can satisfy the use scene when the distance from fluorescence signal detector to imaging system is fixed.

The invention belongs to the technical field of hydraulic control, and relates to a hydraulic control system for a large-dip-angle inclined shaft TBM anti-falling supporting system, which comprises a plurality of hydraulic oil cylinders with output ends connected with corresponding supporting shoes, and a low-pressure oil way and a high-pressure oil way matched with each hydraulic oil cylinder, in the low-pressure oil way, a rod cavity of the hydraulic oil cylinder is connected with a port B of a three-position four-way electromagnetic valve, a signal detector is arranged on an oil way between the rod cavity and the port B, a rodless cavity of the hydraulic oil cylinder is connected with a port A of the three-position four-way electromagnetic valve through a controllable one-way valve, a port P of the three-position four-way electromagnetic valve is connected with a low-pressure hydraulic pump, and a port T of the three-position four-way electromagnetic valve is connected with a hydraulic oil tank. In the high-pressure oil way, a rodless cavity of the hydraulic oil cylinder is connected with a first two-position two-way electromagnetic valve, a rod cavity of the hydraulic oil cylinder is connected with a second two-position two-way electromagnetic valve, the first two-position two-way electromagnetic valve is connected with the high-pressure hydraulic pump through a one-way valve, and the second two-position two-way electromagnetic valve is connected with the hydraulic oil tank. According to the embodiment, high-precision synchronous stretching and retracting, high-pressure tight supporting and power-off pressure maintaining of the anti-falling supporting hydraulic system can be achieved.

The invention discloses a high-efficiency light collection system for a resonance laser-induced fluorescence technology, and relates to the technical field of optics, and the system sequentially comprises a concave reflector, a cylindrical fluorescent light source, a first lens, a second lens, a narrow-band filter, a third lens and a fluorescence signal detector along a light path direction. A fluorescent signal on one side of the cylindrical fluorescent light source is reflected by the concave reflecting mirror, and then is received by the fluorescent signal detector after sequentially passing through the first lens, the second lens, the narrow-band optical filter and the third lens; a fluorescence signal on the other side is transmitted through the first lens and the second lens, and is received by the fluorescence signal detector after passing through the narrow-band optical filter and the third lens in sequence. According to the invention, the lens group with a large numerical aperture is used for collecting fluorescence, and the narrow-band optical filter is added for filtering scattered light and stray light, so that the microminiaturization design of the resonance laser-induced fluorescence high-efficiency light collection system is realized. And meanwhile, the concave reflecting mirror is added opposite to the detector, so that the collection efficiency of the fluorescence is improved.

The application discloses a non-invasive multi-channel multi-parameter biological signal detection device and a use method thereof, relates to the technical field of biological sample signal collection, and comprises the following parts: a plurality of filter plates with different wave bands are uniformly arranged on an excitation filter plate switching device and a signal collection filter plate switching device, and a light source is arranged at one end of the excitation filter plate switching device; a detector is arranged at the light source of one end of the signal collection filter plate switching device; an excitation optical fiber bundle and a signal collection optical fiber bundle are arranged in opposite intervals; a plurality of detection heads are arranged between the excitation optical fiber bundle and the signal collection optical fiber bundle, the detection heads are arranged at one end of the excitation optical fiber bundle away from the excitation filter plate switching device, and a plurality of groups of the detection heads are arranged in the direction of a multi-well plate. The non-invasive multi-channel multi-parameter biological signal detection device and the use method thereof can solve the problems of low flux, low efficiency and single type of detected signals in the current biological signal detection field.

The invention discloses a vehicle monitoring method based on UWB signals. The vehicle monitoring method comprises the following steps: signal transmission: transmitting a series of UWB signals through a UWB signal detector; signal receiving: receiving a UWB signal reflected after encountering a target object through a UWB signal detector; signal analysis: analyzing the received UWB signal through a UWB signal processor to obtain monitoring data reflecting the condition of the target object; according to the monitoring data, a control signal is generated through the system controller, and the working state of the vehicle monitoring system is controlled through the control signal. According to the vehicle monitoring method, effective sensing and dynamic response to the target objects around the vehicle body can be achieved, the real-time performance and accuracy of vehicle monitoring are improved, and the driving safety and the system reliability are enhanced.

The embodiment of the utility model discloses a micro-motion signal detector and a coherent optical module. The micro-motion signal detector comprises at least two parallel detection modules, an isolation module and an amplification module. And each detection module comprises an optical detector and a trans-impedance amplifier which are connected in sequence. The isolation module isolates a direct current signal in the micro voltage signal transmitted by the detection module, and outputs a micro voltage signal only containing an alternating current signal. And the amplification module is connected with the output end of the isolation module and is used for receiving the micro voltage signal subjected to the isolation processing and carrying out multi-stage amplification on the micro voltage signal subjected to the isolation processing. Only one multi-stage amplification link is arranged, so that the amplitude of a micro-motion voltage signal output by each detection module is effectively enhanced, and the response sensitivity of the system to a micro-motion optical signal is improved; and the board distribution area of the high-gain micro-motion signal detector is reduced.

The application provides a method and system for detecting sub-harmonic oscillation based on a tunable wave trap, and a medium. A direct current digital filter and a tunable digital wave trap are cascaded to obtain a single-frequency oscillation signal detector. A wave trap angle frequency of the tunable wave trap is used as an independent variable, and an energy function is constructed based on a to-be-detected oscillation signal and an output of the single-frequency oscillation signal detector. A gradient descent method is used to iteratively update the independent variable in a negative gradient direction of the energy function with a fixed step length, to search for a minimum value of the energy function. When a gradient of the energy function with respect to the independent variable is zero, the corresponding angle frequency is determined as an angle frequency of the to-be-detected oscillation signal. The implementation process is simple and easy to implement, the calculation amount is small, and the real-time and accurate detection of the sub-harmonic oscillation signal can be realized.

The invention provides a spectrum synthesis device based on optical fiber laser polarization. A seed laser generator outputs multiple sets of seed laser at the same time, and a first beam splitter divides each set of seed laser into multiple beams of branch laser; the output characteristics of the branch lasers are modulated through the output characteristic controller, the branch lasers are synthesized through the polarization synthesizer to obtain synthesized lasers used for spectrum synthesis, the synthesized lasers are conveyed to the spectrum synthesizer through the coupling optical fiber, and spectrum synthesis is carried out on the multiple sets of lasers with different wavelengths to obtain synthesized lasers used for spectrum synthesis. And secondly, a first signal detector is further arranged on the side wall of the coupling optical fiber, power data of the synthesized laser is detected through the first signal detector, an output characteristic controller is controlled according to the power data, and the output characteristic of the synthesized laser is controlled through the output characteristic controller. The first signal detector can realize detection of synthesized laser power data without using high-power laser splitting, so that the structure of the spectrum synthesis device is simplified.

Disclosed are a door opening warning method and system for a vehicle, and a vehicle. The warning method comprises: on the basis of a plurality of UWB signal detectors provided on a vehicle body, detecting in real time a UWB echo signal in a rear-side region of the vehicle body, wherein the UWB echo signal is a UWB signal reflected by an object after a standard UWB signal transmitted by a UWB signal transmitter impinges upon the object; analyzing the UWB echo signal to obtain a detection signal, wherein 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 of the moving object; and upon detecting that a door state of the vehicle body changes from a locked state to an opened state, if the detection signal indicates that there is a moving object approaching the vehicle body and the distance between the moving object and the vehicle body is less than a preset threshold value, outputting warning information on the basis of the detection signal.

A system (10) for carrying light signal data between points in an electronic assembly (12). A light signal source (20, 32, 42, 54, 66, 78, 90, 106) is mounted at a first point. Light signal source (20, 32, 42, 54, 66, 78, 90, 106) emits light signal along a first path. A light signal detector (22, 36, 46, 58, 68, 80, 92, 108) is mounted to a second point in electronic assembly (12). A metalens (44, 62, 96, 112) is set in first path that directs said light signal toward light signal detector (22, 36, 46, 58, 68, 80, 92, 108). If interim substrates are disposed between the first point and the second point, features are provided that enable the light signal to pass. In addition, a metalens can redirect light signal away from the first path, correct distortions in light signal and / or focus light signal toward light signal detector.

A computer-implemented reconstruction method of discrete digital signals in noisy overloaded wireless communication systems with CSI Errors that is characterized by a channel matrix of complex coefficients, the method including receiving the signal from channel by a signal detector, estimation of the CSI error parameter τ is done at the receiver, estimation noise power is done by a noise power estimator, forwarding the detected signal and the CSI error parameter τ and noise power estimation to a decoder that estimates the transmitted symbol, wherein the estimation of the decoder produces a symbol that could probably have been transmitted it is forwarded to a de-mapper, which outputs the bit estimates corresponding to the estimated transmit signal and the corresponding estimated symbol to a microprocessor for further processing.

A vehicle object and traffic signal detection system includes an object detection sensor of a vehicle, the object detection sensor is operable to detect living objects within a threshold distance from the vehicle, a traffic signal detector of the vehicle, the traffic signal detector operable to permit detection of a flashing, illuminated traffic signal, a display visible by an occupant of the vehicle, and a controller. The controller is communicated with the object detection sensor, the traffic signal detector and the display to provide a notification on the display when a flashing, illuminated traffic signal is detected and when a living object is detected within the threshold distance.

A half-bridge driver circuit is provided. The circuit includes a detector circuit that generates a signal indicating whether a floating reference voltage is greater than a second supply voltage. The detector circuit includes a first circuit, a second circuit and combinational logic circuit. A first comparator circuit of the first circuit monitors a voltage drop at a resistance and sets a first control signal to a first logic level when the monitored voltage drop is smaller than a first threshold. A second comparator circuit of the second circuit monitors a current provided by an output transistor of a current mirror and sets a second control signal to a first logic level when the monitored current is greater than a second threshold. The combinational logic circuit asserts the signal when the first control signal has the respective first logic level or the second control signal has the respective first logic level.

Photovoltaic signal detector for visible light communication between vehicles and infrastructure, with its own power supply, is intended for the creation of so-called smart transport infrastructure. The device is independent of the power supply of the existing infrastructure, thanks to the photovoltaic panel (3). In this case, the photovoltaic panel (3) also serves as a photodetector for receiving a light signal (8) and, thanks to its surface, enables light communication, even if it is partially contaminated, for example, with snow or dust.