960 results about "Signal processing circuits" patented technology

The invention discloses a high-speed multi-photon detection system and method. The system comprises a detector and a signal processing circuit, wherein the detector is composed of a window plated with a photoelectric cathode, a micro-channel plate stack and an anode; a plurality of incident photons are converted into a plurality of photoelectrons by the photoelectric cathode, and the photoelectrons are converted into electron cloud by the micro-channel plate stack; the incident electron cloud is divided into multiple paths by three layers of staggered metal strip electrodes of the anode, and charge collection is carried out to obtain charge short pulses of each layer of electrode; the signal processing circuit converts the charge short pulses transmitted by the three layers of electrodes into digital pulse signals, obtains the centroid coordinates of the electron cloud from the digital pulse signals as the abscissa value, the ordinate value and the verification value of the incident photon position, combines the abscissa value, the ordinate value and the verification value based on the screening condition to obtain the target two-dimensional coordinates, and finally obtains the target two-dimensional coordinates. And transmitting to a terminal for imaging display. According to the invention, a plurality of synchronous photons can be detected, the overall counting rate of the detector is greatly improved, and the detection efficiency is improved.

A system and method for detecting anomalies in encrypted network traffic without decrypting encrypted payloads is disclosed. The invention comprises a hardware-accelerated pipeline including a packet acquisition unit configured to extract observable header attributes and timestamp values, a signal analysis unit implemented using digital signal processing circuitry to generate temporal and spectral characteristics of encrypted packet flows, and a morphometric extraction unit that produces encrypted-flow descriptors based on statistical dispersion, burst patterns, and ciphertext variability. A behavioral graph construction unit generates graph-structured representations of encrypted flows using incremental state-transition encoding. An artificial-intelligence inference unit employing a tensor-processing processor performs multi-stage anomaly analysis through temporal reconstruction, attention-based weighting of descriptors, and graph-structural deviation assessment to compute anomaly scores without decrypting any payload. A secure response control unit evaluates the scores against policy thresholds and performs mitigation actions while preserving confidentiality.

The invention discloses an electricity testing measuring device for power equipment. The invention relates to the field of space electric field measurement, and solves the problems of unsafety and low anti-interference capability of an existing electricity testing scheme. The electric field sensor collects the electric field intensity in a non-contact manner, and the distance sensor synchronously collects the detection distance, so that a conventional contact type electroscope does not need to contact equipment through a telescopic insulating rod. The signal processing circuit preprocesses electric field intensity information and distance information respectively to obtain effective analog signals representing the electric field to be measured, and the defect that a traditional non-contact plate electrode sensor induces stray electric fields indifferentially is overcome. Besides, the judgment control circuit judges the electrification state according to the preset electric field threshold value corresponding to the current distance analog signal instead of a single fixed threshold value of a traditional device instead of adopting a fixed threshold value, the electric field distribution characteristics of equipment with different voltage grades are adapted, manual intervention is not needed, and personal safety is guaranteed. And the occurrence rate of production accidents caused by abnormal electrification of equipment is reduced.

The invention relates to the technical field of power distribution automation auxiliary power supply control, and discloses an intelligent power distribution circuit system for a digital ring main unit, which comprises a transient voltage gradient induction bridge circuit, a hardware signal processing circuit, a power switch unit and a controlled energy release unit, according to the system, a transient voltage gradient induction bridge circuit is used for collecting a primary side bus voltage change rate signal, a hardware signal processing circuit carries out derivation operation on an induction signal and compares the induction signal with a voltage gradient threshold value, and a power switch unit is blocked at the moment that the voltage abnormally drops so as to cut off a load current path. According to the invention, a hardware parameter direct mapping mechanism is utilized to realize microsecond transient protection response, and the physical decoupling of protection logic and digital software is realized by balancing bus potential pulse caused by sudden unloading of a load through the inherent dehumidification resistor in the multiplexing cabinet.

The utility model provides a multichannel staggered sampling SPAD module which is arranged in a laser radar and serves as a receiving module of a machine radar, an MCU is arranged in a laser tool, the MCU is provided with an MCU interface, and the multichannel staggered sampling SPAD module comprises an SPAD unit, a TDC circuit array, a signal processing circuit and a coding circuit; wherein the work cycles of the TDC circuits in the TDC circuit array are sequentially arranged in a staggered manner, so that time of the SPAD units is sampled in a staggered manner, a delay chain is formed, the TDC circuit array can output a second value once every a fixed time length, and the fixed time length is smaller than the work cycle of one TDC circuit. After the technical scheme is adopted, the upper limit of the signal transmission rate can be greatly improved, so that the sampling efficiency is improved, and stronger scanning performance is realized.

The invention relates to the technical field of automatic welding, and discloses a micro welding seam tracking method and system based on electromagnetic induction. According to the method, a high-frequency alternating magnetic field is applied to a welding seam area through an exciting coil in the micro electromagnetic sensing core; an induction coil in the electromagnetic sensing core is used for detecting magnetic field disturbance caused by geometric shape changes of the weld groove, and induction signals are obtained; processing the induction signal through a signal processing circuit integrated in the probe, namely converting the impedance change of the coil into a voltage signal, demodulating and filtering the voltage signal, and extracting a direct-current voltage signal corresponding to the deviation of the probe relative to the central position of the welding seam; the direct-current voltage signals serve as position feedback information to be output to a welding robot control system; and the movement track of the welding robot is adjusted in real time according to the position feedback information, and welding seam tracking and path deviation correction are achieved.

A system and method are described for emitter identification and tracking in an electronic warfare (EW) environment. The system includes an antenna array configured to receive signals from radio frequency (RF) emitters during a dwell. Processing circuitry converts the received signals into digital signals. Pulses are detected and characteristics of the pulses determined to form pulse descriptor words (PDWs). The PDWs obtained during the dwell are deinterleaved using unsupervised machine learning to form clusters. The clusters are categorized using one or more supervised machine learning algorithms to determine whether the PDWs correspond to known or unknown emitters and the results tracked as in or out of library emitters. After merging the in or out of library emitters, an emitter report is generated and used to update a library of emitter profiles used by the supervised machine learning algorithms as well as determine countermeasures to generate.

The utility model discloses a current sampling system and an energy storage device. The current sampling system comprises a control unit, a plurality of current sampling circuits and a plurality of signal processing circuits, wherein each current sampling circuit is provided with a sampling resistor and a switching device; a connecting end after the first ends of the current sampling circuits are connected is connected with the negative electrode end of the storage battery, and a connecting end after the second ends of the current sampling circuits are connected is connected with an external power device; the signal receiving end of each signal processing circuit is connected with the sampling resistor in the current sampling circuit corresponding to the signal processing circuit, and is used for collecting differential voltage at the two ends of the sampling resistor and sending the differential voltage to the control unit; the control unit is used for receiving the differential voltage and determining the battery current of the storage battery based on the differential voltage. According to the technical scheme disclosed by the utility model, the sampling precision of the battery current of the storage battery can be improved.

The invention relates to the related technical field of geophysical exploration instruments, in particular to a miniaturized broadband induction type magnetic field sensor. The sensor comprises a magnetic core, an induction coil, a feedback coil and a signal processing circuit. The invention is characterized in that the magnetic core is of a long rod-shaped structure formed by laminating and curing high-permeability soft magnetic strip materials, the length of the magnetic core is 580mm-640mm, the cross section of the magnetic core is a square or an equivalent circle with the side length of 11mm-15mm, and the length-diameter ratio of the magnetic core is greater than 40; the feedback coil is formed by spirally winding a metal foil belt along the magnetic core, and the metal foil belt forms a main shielding layer for restraining interference of an external electric field at the same time. By optimizing the size and the length-diameter ratio of the magnetic core and combining the integrated design of feedback and shielding functions, while the working frequency band and the low-noise performance are ensured, remarkable miniaturization and light weight of the sensor are realized, and the portability and the layout efficiency of field exploration are greatly improved.

A photoelectric conversion device includes a pixel including a photoelectric conversion unit and an output unit configured to output a signal based on charge generated in the photoelectric conversion unit, a signal output line connected to the pixel, a level shift circuit connected to the signal output line and configured to perform a level-shift on an output signal of the pixel in a direction in which a voltage decreases, and a signal processing circuit connected to the level shift circuit and including a capacitor to which an output signal of the level shift circuit is input. The signal processing circuit includes an oversampling-type analog-to-digital conversion circuit.

The invention relates to the technical field of chips, and provides a power-on control method and system, a chip, equipment and a storage medium, and the method comprises the steps: controlling a first power domain to be powered on, maintaining a second power domain to be in a power-off state, and driving a signal processing circuit to process an external input signal and output a target signal, the first power domain supplies power to the signal processing circuit, and the second power domain supplies power to a post-stage logic circuit; after determining that the target signal is in a stable state, controlling the second power domain to be powered on so as to start the post-stage logic circuit; wherein the started post-stage logic circuit carries out sampling processing on the target signal in a stable state. According to the invention, power domain division is carried out on the signal processing circuit and the post-stage logic circuit and time-sharing power-on of the signal processing circuit and the post-stage logic circuit is controlled, so that stable and effective signals can be always sampled by the post-stage logic circuit when the post-stage logic circuit is started, and the power-on reliability of a chip and the stability of a system are improved.

The invention relates to the technical field of equipment lubricating oil monitoring, in particular to a wear debris electrostatic monitoring method and system based on combination of characteristic mode decomposition and time-frequency images, and an electrostatic sensor monitoring system comprises a sensor shell, an annular copper probe, a polyether-ether-ketone pipeline, a shielding cover, a signal processing circuit and other modules. An insulating pipe in the sensor is a polyether-ether-ketone pipeline, lubricating oil passes through the inside of the polyether-ether-ketone pipeline, and a red copper probe of the sensor is attached to the outer surface of the polyether-ether-ketone pipeline. The method comprises the following steps of: firstly, constructing a signal enhancement model based on characteristic modal decomposition and a kurtosis measurement criterion, and screening out a key modal component with high sparsity for reconstruction by calculating a Gini coefficient of each modal component; further enhancing the signal pulse of the wear debris through modal component optimization reconstruction and a sparse representation model; and finally, identifying the wear debris impact signal based on the continuous wavelet transform time-frequency image to realize real-time monitoring of the wear debris.

Signal processing circuitry configured to receive an input signal and to output a processed output signal, wherein the signal processing circuitry is configured to: receive an indication of a temporal location of a transient in the input signal; and provide, in the processed output signal, a masking signal bridging the temporal location of the transient to mask the transient.

The invention provides a grating ruler displacement measurement method based on a linear beam splitting grating and a displacement sensor, the method is applied to a miniature grating ruler displacement sensor based on the linear beam splitting grating, and the method comprises the following steps: when a grating ruler and a read head module generate relative displacement, a light beam is emitted through a light source, and the emergent light beam is split through the beam splitting grating to obtain a grating ruler; one beam splitting light is incident to a measuring grating in a grating ruler, and is reflected by the measuring grating to form a Talbot image; after the Talbot image is modulated through the scanning plate, the modulated Talbot image is received through a photoelectric detector, and four paths of current signals with the phase difference of 90 degrees are generated; and current-voltage conversion, difference and subdivision processing are sequentially carried out on the four paths of current signals through the signal processing circuit, high-resolution AB signals are obtained, and the AB signals are used for determining the relative displacement of the grating ruler and the read head module. According to the invention, the application requirements of high precision, small size, low power consumption and large-range installation tolerance are met.

The invention relates to the technical field of conversion circuits, and provides a converter drift suppression front-end circuit and a drift suppression method, and the circuit comprises a first signal processing circuit and a second signal processing circuit which are symmetrically distributed, and a high-frequency path and a low-frequency path which are arranged between the first signal processing circuit and the second signal processing circuit; wherein a normal-phase input signal forms a first node signal after passing through the first signal processing circuit, and a reverse-phase input signal corresponding to the normal-phase input signal forms a second node signal after passing through the second signal processing circuit; the first node signal and the second node signal are respectively input into a normal-phase input end and an inverted-phase input end of a converter CTLE through the high-frequency path or the low-frequency path; and the low-frequency path comprises a fully differential amplifier with resistance proportion negative feedback. According to the invention, baseline drift can be effectively suppressed, so that the stability of converter receiving end signals is improved.

A heat flux sensor device (100) comprising a semiconductor substrate layer (104) and a cap layer (102) that has a substrate-facing side (106) and a reception side (108). The cap layer (102) is bonded on the substrate-facing side (106) to the substrate layer (104), and the substrate layer (104) and the cap layer (102) together defining a first cavity (116). A first thermal sensor element (120, 122) is disposed within the first cavity (116) and configured to translate thermal energy proportional to a temperature difference between the cap layer (102) and the substrate layer (104) into first electrical energy. Signal processing circuitry is provided operably coupled to the first thermal sensor element (120, 122) and configured to use the first electrical energy generated by the first thermal sensor element (120, 122) to measure a heat flux flowing from the cap layer (102) to the substrate layer (104). The first cavity (116) is opaque to infrared electromagnetic radiation incident from the reception side (108) of the cap layer (102).

A microprocessor comprises a main control chip, a PWM2 pin of the main control chip is connected with an optocoupler isolation circuit, the optocoupler isolation circuit is connected with an LED constant-current dimming drive circuit, the LED constant-current dimming drive circuit is connected with an LED light source, a PWM1 pin and a DAC pin of the main control chip are both connected with an ultrasonic transmitting circuit, and the ultrasonic transmitting circuit is connected with an LED light source. The ultrasonic transmitting circuit is connected with the ultrasonic receiving circuit through the ultrasonic transmitting and receiving probe, and the ultrasonic receiving circuit is connected with an ADC pin of the main control chip through the signal processing circuit; the invention further discloses an implementation method of the LED drive control circuit with the ultrasonic dynamic dimming function. According to the invention, natural brightness adjustment of near-dark and far-bright is realized through ultrasonic real-time distance measurement in combination with a self-adaptive dimming algorithm, intelligent dynamic dimming is realized, a user does not need to perform manual operation, the illumination brightness dynamically changes along with the distance, visual fatigue caused by too strong or too dark light is avoided, and the interaction comfort is remarkably improved.

The present disclosure relates to a radar system having signal processing circuitry configured to receive sets of samples each representing a respective reflected radar signal and to generate sets of interference-suppressed samples including a first set of interference-suppressed samples corresponding to a first reflected radar signal represented by a first set of samples. To generate the first set of interference-suppressed samples, the signal processing circuitry may determine a first threshold based on at least one previously determined threshold for at least a second set of samples of the sets of samples, determine a second threshold based on the first set of samples, determine a third threshold as an average of the first threshold and the second threshold, and apply the third threshold to the first set of samples to remove or suppress interference components of the first set of samples to generate the first set of interference-suppressed samples.

The invention relates to a visual on-load voltage regulation tap switch control system, device and medium, which comprises a single chip microcomputer control circuit, the single chip microcomputer control circuit is connected with a signal processing circuit and a power supply circuit, and the signal processing circuit is connected with a voltage zero cross detection circuit, a voltage sensor and a data acquisition unit. The voltage zero-cross detection circuit, the voltage sensor, the data acquisition unit and the power supply circuit are all connected with the isolation reduction transformer, and the isolation reduction transformer is connected with the low-voltage side voltage of the distribution transformer; the single-chip microcomputer control circuit is further connected with a switch position sensor, a communication circuit, a switch drive circuit and a thyristor trigger circuit. The communication circuit is in communication connection with a remote computer through an RS485. The method has the advantages of realizing automatic voltage regulation conversion, stabilizing voltage, accurately setting visual parameters and realizing non-impact voltage regulation.

The invention relates to the technical field of space environment detection, in particular to a photoelectric sensor for space dust particle size detection, which comprises an optical signal collection assembly and an electric signal conversion and acquisition assembly, and is characterized in that the optical signal collection assembly comprises a support, a front pressing plate, an optical filter and a sensor; the electric signal conversion and acquisition assembly comprises a circuit box body, a photoelectric conversion detector, a signal processing circuit board, a signal wire passing sleeve and a circuit box cover. The support of the particle size sensor is used as a main structure, and other structures are subjected to split design and integrated precision assembly, so that the processing difficulty of a complex structure is reduced, the machining precision of a single structure is effectively improved, and the form and position processing error of each structural part is effectively controlled; the non-imaging compound paraboloid condensation sensor is independently designed and processed, so that the processing precision of a product is improved; and vibration reduction design is independently carried out on internal structural components, so that the mechanical impact resistance of weak parts is improved.

The application provides a wireless charging device and a foreign matter detection method, device, circuit and equipment thereof. The method comprises the following steps: applying a damping oscillation signal processing circuit to process a damping oscillation signal of a wireless power transmitter to be detected, so as to obtain a corresponding pulse signal; determining two target amplitudes of the damping oscillation signal and a target cycle number between the two target amplitudes according to the pulse signal; determining a current oscillation frequency and a current quality factor of the wireless power transmitter to be detected based on the two target amplitudes and the target cycle number; and determining whether there is foreign matter in the working range of the wireless power transmitter to be detected based on the current oscillation frequency, the current quality factor, a preset standard quality factor and a preset standard oscillation frequency. The application can output a pulse signal accurately reflecting the damping oscillation signal of the wireless power transmitter, so as to calculate the current quality factor and the current oscillation frequency of the wireless power transmitter based on the pulse signal, and realize more accurate foreign matter detection.

The invention discloses a low-noise, high-precision and low-power-consumption tunnel magnetoresistance array type magnetic anomaly detection device, and relates to the field of geomagnetic field magnetic anomaly detection. In order to overcome the defects that in the prior art, the detection precision is insufficient, the noise level is high, power consumption is large, and long-time stable operation is difficult to consider, the technical scheme provided by the invention is that a signal acquisition and amplification circuit is composed of a plurality of triaxial tunnel magnetoresistive sensors, an isolation circuit, an instrument amplification circuit and a passive filter circuit; the master control and signal processing circuit is composed of a high-precision analog-to-digital conversion circuit, a clock circuit and a microprocessor circuit. The signal transmission circuit is composed of an Ethernet module and is used for transmitting the processed data to an upper computer; the power supply module is composed of a low-noise low-dropout voltage stabilizing circuit and a reference voltage circuit, and is used for providing a stable power supply and a unified reference voltage. The method is suitable for long-time high-precision geomagnetic anomaly detection work in geophysical exploration, national defense safety monitoring and complex environments.

An infrared detector includes a tuning fork resonator comprising an mechanical-to-electrical transduction mechanism; a metamaterial absorber residing on at least one side of the tuning fork resonator, the metamaterial absorber comprising at least a material layer with subwavelength inclusions; and a signal processing circuit to translate the electrical signal into an amplitude of mechanical motion of the tuning fork.

The invention discloses a reflection absolute type angular displacement sensor and a measurement method. The reflection absolute type angular displacement sensor comprises a stator base body, excitation electrodes on the stator base body, a rotor base body and induction electrodes on the rotor base body. The surface, facing the stator base body, of the rotor base body is covered with a light absorption insulating layer covering the excitation electrodes, two circles of reflective patterns are arranged on the light absorption insulating layer, and the two circles of reflective patterns are different and are coprime in number. And the area change of each reflective pattern along the circumference and the corresponding angle change form a function relationship. A light-emitting module and two sets of photoelectric sensors are arranged on the surface, facing the rotor base body, of the stator base body, the light-emitting module is used for sending light beams to the two circles of reflective patterns, and the photoelectric sensors are used for collecting light intensity reflected by the reflective patterns and outputting obtained photoelectric signals to a signal processing circuit. The photoelectric sensing principle is adopted for rough measurement, the transverse size of the sensor can be greatly reduced, fine measurement and rough measurement do not interfere with each other, the measurement precision is high, and implementation is easy.

According to an aspect, a display system includes: a display panel having a display area provided with pixels and configured to allow a user to visually recognize a background transmitted through the display area; a light source configured to emit light toward a side surface of the display panel; a signal processing circuit configured to generate input gradation values and output either first gradation values that are the input gradation values or second gradation values obtained by multiplying each of the input gradation values by an adjustment coefficient of 1 or smaller corresponding to attenuation of light propagating in the display panel; an illuminance sensor; and a camera. The signal processing circuit is configured to output the first gradation values when average luminance of the background image is a first predetermined value or larger and illuminance acquired by the illuminance sensor is a second predetermined value or larger.

The utility model relates to electromagnetic flowmeter technical field, the utility model discloses a kind of electromagnetic flowmeter transmitter with temperature measurement, including through power supply circuit and signal isolation circuit connection control circuit and signal processing circuit, the signal processing circuit includes the wiring terminal J8 of realizing multiple wiring mode;Based on the selective connection temperature sensor of wiring terminal J8, temperature signal is connected to the input end of operational amplifier UT1A by analog switch U18 output, based on the input end of analog-digital converter U19 connected to the output end of operational amplifier UT1A;The control pin of analog-digital converter U19 is connected to control circuit, for controlling the collection and transmission of data, the utility model is through integrated multifunction and flexible measurement mode, high precision, high flexibility, low cost, high reliability and strong anti-interference ability are realized, the efficiency and performance of industrial measurement system are significantly improved.

A processing system includes a client network circuit over which a processing circuit communicates with one or more client circuits to carry out tasks of a software application executing in the processing circuit. During a period of inactivity in the client circuit(s), the client network circuit may enter a low-power mode by initiating a power-down sequence. The exemplary client network circuit includes a monitor circuit to receive client requests from the client circuit(s) in case the client circuit becomes active during the power-down sequence. The monitor circuit provides an interrupt signal to the processing circuit, which responds by causing the client network circuit to reverse the power-down sequence and return to the active mode to service the client request. In this manner, errors can be prevented because the client requests received during a power-down sequence of the client network circuit are not lost.

The invention relates to a liquid flow detection system based on a thin film thermistor, and the system comprises a pipeline which is used for conveying to-be-detected liquid; the sensor body is mounted on the pipe wall of the pipeline; the inductive probe is arranged at the bottom of the sensor body and extends into a flow channel of the pipeline, the inductive probe comprises a heating resistor serving as a heating element and a temperature measuring resistor serving as a temperature measuring element, and the temperature measuring resistor is located at the downstream of the heating resistor; and the signal processing circuit board is arranged inside or outside the sensor body, is electrically connected with the heating resistor and the temperature measuring resistor, and is used for collecting and processing temperature signals. According to the invention, the MEMS film thermistor is utilized, the thermal capacity is small, the response is fast, and the fault of a traditional thermal sensor is broken through; according to the method, the thermal saturation bottleneck of a small flow area with the flow rate of 1 [mu] L / min is overcome, and a delta T / delta t composite algorithm model is introduced, so that the linearity and the sensitivity of the low flow area are effectively expanded, and the flow measurement with the precision of nL / min to [mu] L / min is realized.

According to one embodiment, a condition monitoring apparatus includes a processing circuitry. The processing circuitry is configured to collect a sensor signal output from a sensor that monitors a condition of a mechanical device that is at least partially mobile. The processing circuitry is configured to diagnose a presence or absence of an anomaly in the mechanical device based on the sensor signal. The processing circuitry is configured to cut out the sensor signal in a time width according to any one or more of a speed, an acceleration, and a jerk of the mechanical device. The processing circuitry is configured to determine the presence or absence of an anomaly based on the cut out sensor signal.

Embodiments of the present application relate to a semiconductor device and packaging structure with stress change compensation control. The semiconductor device packaging structure comprises: a packaging shell for packaging a semiconductor chip in the packaging shell; a pressure sensitive layer arranged on the upper surface and / or lower surface of the semiconductor chip; the pressure sensitive layer senses the stress change of the semiconductor chip caused by temperature change and outputs a pressure signal; a signal processing module comprising a signal preprocessing circuit and a pressure signal processing circuit; the pressure signal is amplified, filtered and converted by the signal preprocessing circuit, and is sent to the pressure signal processing circuit; comparison processing and feedback adjustment are performed in the pressure signal processing circuit to generate a dynamic compensation signal; a refrigeration and heating control circuit receives the dynamic compensation signal and generates a heating control signal or a refrigeration control signal accordingly, and sends the signal to a heater to heat the semiconductor chip or to a refrigerator to cool the semiconductor chip.