1766 results about "Signal transition" patented technology

The invention discloses an eddy current displacement sensor sine constant current source excitation method, and belongs to the technical field of sensor measurement and control. The method comprises the following steps: S1, generating positive and negative symmetric reference voltages through a reference voltage source circuit; s2, outputting a square wave control signal with adjustable frequency by the control chip, and driving a switching circuit to generate a square wave taking the positive and negative reference voltage as a level; s3, processing the square wave through a filter circuit to obtain a standard sine wave voltage signal; and S4, converting the sine voltage signal into sine constant current source excitation through a Howland current source circuit, and outputting the sine constant current source excitation to a sensor probe coil. According to the invention, through combination of digital control and analog conversion, the circuit structure is simplified, the cost is significantly reduced, and convenient adjustment of the output frequency and high stability and precision of the output current are realized at the same time.

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.

An example device includes a rectifier that converts an AC signal received at an AC side of the rectifier from a wireless charging receive coil into a DC power signal output at a DC side of the rectifier; a first capacitor connected to an upper rail of the AC side; a second capacitor connected to a lower rail of the AC side; a first switch between the first capacitor and a ground; a second switch between the second capacitor and the ground; and a controller configured to: toggle the first switch and the second switch to communicate with an external device; determine, based on a comparison of voltage levels measured at the computing device, whether to set the switches as open or closed when not communicating; and set, responsive to determining to set the switches as closed, the first switch and the second switch as closed when not communicating.

The invention discloses a bidirectional flow measurement ultrasonic flowmeter, and relates to the technical field of bidirectional flow measurement. The ultrasonic flowmeter comprises an amplifying circuit, a balance and unbalance conversion circuit, a signal frequency mixing circuit, a low-pass filtering amplifying circuit, an automatic gain tracking adjusting circuit and an ADC (Analog to Digital Converter). And after the signal reflected and diffracted by the liquid is amplified by the amplifying circuit, the balanced and unbalanced conversion circuit converts the amplified single-ended signal into a differential signal. After a differential signal and an input local oscillator signal are mixed by the signal mixing circuit, gain adjustment is carried out on the differential signal and the input local oscillator signal sequentially through the automatic gain tracking adjustment circuit, upper frequency is filtered out through the low-pass filtering amplification circuit, and finally signal acquisition is carried out through the ADC. According to the ultrasonic flowmeter, the effective signal collection effect is improved, and the ultrasonic flowmeter is smaller in size space, lower in cost and more excellent in performance.

The invention relates to the technical field of signal processing, in particular to a pipeline guided wave signal processing method and system. The method comprises the following steps: acquiring a multi-channel ultrasonic guided wave signal through a sensor array circumferentially arranged around a pipeline, and converting the multi-channel ultrasonic guided wave signal into a frequency domain response matrix; calculating a circumferential amplitude distortion degree based on the power spectrum amplitude distribution of each channel; constructing a modal coupling matrix by combining the circumferential amplitude distortion degree and the theoretical wave number of the ideal pipeline; correcting the standard orthogonal modal matrix to generate a modal projection matrix; and decomposing the frequency domain response matrix by using the projection matrix, and separating a structure echo component and a defect signal component. According to the method, the influence of geometric defects such as ovality deviation is evaluated more accurately, energy exchange between modeling modes is accurately established, and orthogonality hypothesis is corrected; modal energy leakage is inhibited, and the decomposition accuracy is improved; signals are effectively separated, coherent noise interference is solved, and the accuracy and reliability of pipeline defect detection are improved.

A first electrical signal is received from a first cardioid microphone capsule of a microphone assembly. The first cardioid microphone capsule is oriented to face in a first direction. A second electrical signal is received from a second cardioid microphone capsule of the microphone assembly. The second microphone capsule is oriented to face in a second direction that is opposite the first direction. A polar pattern is formed for the microphone assembly by converting the first electrical signal into a first audio signal and converting the second electrical signal into a second audio signal. A first weight is applied to the first audio signal and a second weight is applied to the second audio signal. The polar pattern is generated for the microphone assembly by summing the first audio signal and the second audio signal.

The embodiments of the present application provide a signal transmitting method and device, a non-volatile readable storage medium and an electronic device. The method includes: when a first light emitting element has acquired a first electric signal, converting the first electric signal into a first optical signal, inputting the first optical signal into a first light-switching-switch unit, and outputting the first optical signal to an outputting port of the first light-switching-switch unit via a first optical passage, wherein the first electric signal is an electric signal of a first type, and the outputting port is connected to an optical fiber; and when a second light emitting element has acquired a second electric signal, by using the second light emitting element, converting the second electric signal into a second optical signal, inputting the second optical signal into the first light-switching-switch unit, and outputting the second optical signal to the outputting port of the first light-switching-switch unit via a second optical passage in the first light-switching-switch unit, wherein the second electric signal is an electric signal of a second type.

The invention discloses an analog signal pulse encoding device based on event driving and an analog signal processing method, and the device comprises a signal conditioning module which comprises at least one conditioning unit, and the conditioning unit is used for receiving an analog signal, carrying out the front-end analog conditioning of the signal, and outputting an analog conditioning signal; the threshold comparison module is connected with the signal conditioning module and is used for carrying out threshold detection on the analog conditioning signal according to a set threshold and then outputting a threshold comparison signal; the event triggering module is connected with the threshold comparison module and is used for triggering a pulse event signal corresponding to the analog conditioning signal according to the threshold comparison signal; and the pulse coding module is connected with the event triggering module and is used for converting the pulse event signal into a pulse coding signal by adopting a pulse coding mode. According to the invention, by introducing the threshold comparison module and the event trigger module at the front end of the device, invalid sampling can be effectively avoided, a large amount of redundant data can be reduced, and power consumption, communication and storage pressure and burden can be reduced.

Systems and methods are disclosed comprising techniques for signal conversion, such as monitoring digital communications signal data transmitted among a user set, converting signal data of a first discrete signal chunk into a first alphanumeric signal set, inputting the first alphanumeric signal set into a machine learning model to generate a first scoring distribution that maps to a first signal event category set, retrieving, for a second discrete signal chunk, a second alphanumeric signal set and a second scoring distribution that maps to a second signal event category set, determining a signal event divergence score via comparing the first and the second scoring distributions, and when the signal event divergence score fails to satisfy a tolerance threshold, transmitting, to at least one user of the user set, an interventive action that, when executed by the at least one user, causes a transformation of the digital communications signal data.

A mixing matrix, suitable for converting a scene-based audio (SBA) input signal to an object-based audio (OBA) signal, is constructed so that the resulting OBA signal is composed of object signals with amplitudes that are biased according to amplitude preference coefficients. The amplitude preference coefficients are chosen to place dominant spatial audio objects in a fewer number of output object channels, to provide a more discrete OBA rendering of the SBA input signal.

A method includes transmitting radar signals toward a target area via a phased array antenna of a synthetic aperture radar (SAR) antenna system, receiving reflected radar signals from the target area, performing, via a signal processor, one or more SAR algorithms to convert the reflected radar signals into one or more images, video, and / or measurements of the target area, receiving one or more of ground-based visual data, aerial data, and / or historical or architectural data, integrating the ground-based visual data, the aerial data, and / or the historical or architectural data with the one or more images, video, and / or measurements produced by the SAR antenna system to produce a cohesive visualization, and sending the visualization to a user device for display and interaction therewith.

The invention provides an anti-noise interference frequency parameter estimation method for high-precision optical coherence ranging, which comprises the following steps: acquiring a spectral interference signal of an optical low-coherence interference system and a reference light spectral signal output only by a reference arm, and converting the spectral interference signal into interference signals with wave number space arranged at equal intervals, carrying out spectral density amplitude normalization to obtain a standard interference signal so as to eliminate interference of light source spectrum fluctuation and non-uniform sampling on frequency estimation; hanning window modulation is applied to a standard interference signal, spectrum leakage is suppressed, spectrum analysis is performed on the modulated signal, a peak value and an adjacent secondary peak value of a spectrum main lobe are extracted, a frequency correction amount is calculated based on a peak value and secondary peak value amplitude ratio relation derived by a Hanning window spectrum mode function, and an accurate frequency of the interference signal is obtained; and calculating the displacement of the object to be measured according to the product of the accurate frequency and the spectral resolution of the optical low-coherence interference system in combination with the refractive index of the light in the measurement medium.

A semiconductor device includes a first circuit configured to receive a first signal, which is a differential parallel signal, and output a second signal, which is a differential serial signal, based on the first signal. The first circuit includes a second circuit configured to convert the first signal to a third signal, which is a differential serial signal, a third circuit configured to receive the third signal and output the second signal, which corresponds to the third signal, a fourth circuit configured to receive the third signal and output a fourth signal corresponding to the third signal selectively during a predetermined operation mode, and a fifth circuit configured to receive the fourth signal and output a fifth signal obtained by buffering the fourth signal.

The invention provides a partial discharge detection system based on a Rydberg atom quantum coherence effect, and the system comprises an optical excitation module which is used for transmitting two-photon laser to excite hot atoms to enter a Rydberg state; the atomic gas chamber is used for accommodating hot atoms and is coupled with an electromagnetic field generated by the partial discharge signal, so that the hot atoms generate energy level response change under the action of the electromagnetic field; the detection light path module is used for detecting a change signal of light signal intensity in the atomic gas chamber and converting the change signal into an electromagnetic response characteristic of an electromagnetic field; the signal acquisition and processing module is used for receiving the electromagnetic response characteristics, demodulating and analyzing the electromagnetic response characteristics and extracting characteristic parameters of the partial discharge signals; and the control and calibration module is used for receiving the characteristic parameters of the partial discharge signal, performing calibration based on an energy level frequency shift rule of Rydberg atoms, and outputting electric field intensity subjected to quantization calibration. The system can realize high-sensitivity, anti-interference and traceable detection of weak partial discharge signals.

Provided is an EVS to which an image plane phase difference method AF function can be easily applied.A photodetection device includes: a first pixel configured to photoelectrically convert incident light from a portion on one side to generate a first current; a second pixel configured to photoelectrically convert the incident light from a portion on a side opposite to the portion of the first pixel to generate a second current; a first luminance circuit provided individually corresponding to the first pixel and configured to generate a first luminance signal according to the first current; a second luminance circuit provided individually corresponding to the second pixel and configured to generate a second luminance signal according to the second current; a first current comparison circuit provided individually corresponding to the first pixel, and configured to compare the first luminance signal with a reference signal and convert the first luminance signal into a first digital signal; a second current comparison circuit provided individually corresponding to the second pixel, and configured to compare the second luminance signal with the reference signal and convert the second luminance signal into a second digital signal; and a control unit configured to adjust a focal position of the incident light on the basis of the first digital signal and the second digital signal.

The technology described herein is directed towards a transcoder that can be deployed and used to couple non-terrestrial network satellites to user equipment, including by decoding and reencoding data packets at the packet level. A metasurface (reconfigurable intelligent surface, or RIS) redirects signals from the satellite to a satellite radio frequency (RF) interface of the transcoder, with the transcoder also coupled by a user equipment (UE) RF interface to user equipment, such as a computing device or cellphone. The transcoder converts satellite-originating signals to UE-compliant signals, and converts UE-originating signal to satellite-compliant signals. The transcoder performs various additional conversion-related functions to facilitate such satellite direct-to-device service, including via frequency conversion, doppler manipulation, a repeater, frequency equalization / negative-slope compensation and RIS-related conversion in both the receive mode and transmit mode of the RIS. Various example form factors for implementing and deploying the transcoder and metasurface can be used.

The invention discloses a fuel cell internal partition current and temperature synchronous acquisition system and method, and relates to the technical field of fuel cell measurement. The system comprises a partition acquisition device, a data receiving module, a signal amplifier and an upper computer, the partition acquisition device adopts a split structure formed by nesting and assembling an inner mold and an outer mold; the inner mold comprises a contact layer and a transmission layer; the contact layer is provided with a plurality of conductive partitions and temperature sensors which are insulated from one another; the transmission layer is provided with a signal conversion unit for converting the partition current into a first voltage signal; the data receiving module is connected with the internal model and is used for acquiring a first voltage signal output by the signal conversion unit and a second voltage signal output by the temperature sensor, amplifying the signals through the signal amplifier and transmitting the signals to the upper computer; and the upper computer is used for analyzing the first voltage signal and the second voltage signal. By adopting the system, high-precision synchronous monitoring of the current and the temperature of the core area of the electric pile can be realized, so that control strategy optimization and fault diagnosis are effectively supported.

The invention provides an anti-interference pressure sensor signal conditioning circuit based on a differential amplification structure, and the circuit comprises a differential input module which is used for receiving a differential signal outputted by a pressure sensor, and carrying out the amplification and filtering of the outputted differential signal, and obtaining a first differential signal; the common-mode suppression module is electrically connected with the differential input module and is used for suppressing a common-mode signal in the first differential signal to obtain a second differential signal; the programmable gain amplification module is electrically connected with the common-mode suppression module and is used for performing programmable gain amplification on the second differential signal to obtain a third differential signal; the low-pass filtering module is electrically connected with the programmable gain amplification module and is used for filtering high-frequency noise in the third differential signal to obtain a fourth differential signal; and the output buffer module is electrically connected with the low-pass filtering module and is used for converting the fourth differential signal into a single-ended signal and outputting the single-ended signal. According to the invention, external electromagnetic interference and common-mode noise can be effectively suppressed, and the stability and accuracy of signal transmission are improved.

The invention relates to the field of optical computing, and provides a signal processing method and device based on an optical computing chip and a photoelectric fusion computing system.The signal processing device comprises an optical input modulation module, a first weight mapping module, a second weight mapping module and an optical output combining module, and the optical input modulation module converts an input signal into a modulated optical signal; the first weight mapping module obtains a first output optical signal based on the first weight; the second weight mapping module acquires a second output optical signal based on a second weight; the optical output combining module obtains a comprehensive output signal based on the first output optical signal and the second output optical signal; the second weight mapping module comprises a light dimension reduction unit, a low-dimensional light modulation unit and a light dimension raising unit, and the light dimension reduction unit performs low-dimensional projection on a modulated light signal; the low-dimensional optical modulation unit adjusts the second weight based on the second weight update signal and obtains an optical signal after low-dimensional processing; and the light dimension raising unit carries out high-dimensional projection on the light signal after low-dimensional processing.

The invention relates to a rotary machine composite fault detection method and system under a time-varying working condition, and belongs to the technical field of rotary machine fault diagnosis. The method comprises the steps of collecting a non-stationary vibration signal under a variable speed working condition, fusing a third-order Renyi entropy and kinematics prior to construct an adaptive time-frequency enhancement model, and outputting weighted time-frequency distribution; global optimization is carried out through a priori constraint Viterbi algorithm, and an instantaneous frequency ridge line is extracted under the condition of no rotating speed sensor; performing angular domain resampling by taking the ridge line as a phase reference, and converting a non-stationary signal into an angular domain stationary signal; constructing an extended difference mode decomposition convex optimization model, and iteratively solving an optimal difference spectrum; and determining a frequency spectrum segmentation threshold value based on self-adaptive change point analysis, performing decoupling separation and time domain reconstruction on the optimal difference spectrum, and completing composite fault diagnosis through feature comparison. The method does not need an external tachometer, can adaptively extract and separate the composite fault features under the variable speed working condition, is high in diagnosis accuracy, and is good in engineering application value.

The invention discloses a direct digital synthesis method and system based on a mixed fraction proportion. The method comprises the following steps: determining an integer frequency control word, a numerator frequency control word and a denominator frequency control word based on a target frequency, a sampling frequency and a bit width of a phase accumulator; performing a fractional phase accumulation operation based on the sampling frequency, the molecular frequency control word, and the phase accumulator to generate a carry signal; performing integer phase carry and accumulation operation in parallel with the fractional phase accumulation operation according to the sampling frequency, the integer frequency control word and the phase accumulator to obtain an integer phase value; and acquiring a waveform digital amplitude corresponding to the integer phase value, and performing signal conversion according to the waveform digital amplitude to obtain an amplitude signal corresponding to the target frequency so as to improve the precision of the frequency synthesis signal.

The invention provides a gain-reconfigurable active phase shifter with a low phase error, and relates to the technical field of phase shifters, and the phase shifter comprises a quadrature coupler which converts a radio frequency input signal into a shunt radio frequency signal; the input matching Balun converts the shunt radio frequency signal into a shunt differential signal; the digital control signal received by the phase inversion variable gain amplifier is used for controlling the on-off state of a differential pair in each differential group, and determining a differential combination current corresponding to a differential pair combination in a conduction state based on a shunt differential signal corresponding to each differential pair; the differential combination current is used for representing a gain state corresponding to the differential pair combination; the input impedance and the output impedance of the phase inversion variable gain amplifier in different gain states are kept unchanged; the vector synthesis module determines a phase shift differential signal based on the differential combined current; the output matching Balun converts the phase shift differential signal into a radio frequency output signal. The antenna has a wide gain adjustable range and a low phase error.

A pulse amplitude modulation 4-level (PAM-4) physical layer (PHY) serializer / deserializer (SerDes) receiver is provided. The receiver may include an analog-front-end (AFE) block to receive a transmit signal, an analog-to-digital converter (ADC) block to convert the transmit signal into a digital signal at sampling intervals defined by a sampling clock signal, a clock and data recovery (CDR) circuit to receive the digital signal from the ADC block and extract a recovered clock signal and a recovered data stream, the recovered data stream containing a sequence of symbols with amplitude values corresponding to four levels of PAM-4, a phase integrator (PI) to generate the sampling clock signal for the ADC block based on the recovered clock signal, and a feedforward phase correction (FFPC) block to receive the recovered data stream and generate a receive signal.

The invention discloses an automatic test system and method for a phased-array antenna, and belongs to the technical field of phased-array antennas. The system comprises a multifunctional control cabinet used for receiving a cooperation instruction issued by an upper computer, decomposing the cooperation instruction into a control instruction for each component in the test system, and issuing the control instruction to a target component, thereby controlling the cooperative work of each component, and completing the automatic test of the phased-array antenna; the switch matrix case is used for realizing signal cross input and output between the horn antenna and the tested phased-array antenna and carrying out vector data test or spectrum data test according to a control instruction; the variable-frequency switch matrix case is used for completing signal conversion of the horn antenna; the amplification switch matrix case is used for realizing signal conversion of the tested phased-array antenna; all parts in the case adopt a universal modular design, and the phased-array antenna testing device has the characteristics of high reliability, good maintainability, low system building cost and the like, can automatically test, improves the testing efficiency of the phased-array antenna, and reduces manual intervention.

To provide a vacuum pump that reduces the number of pins used for data transmission and has high extendability, the vacuum pump includes a pump main body (100) that sucks and exhausts gas; a plurality of physical sensors (21 to 23) provided in the pump main body; and a connector (10) used for connection with an external device (200). The vacuum pump further includes: a detection circuit (56) that detects detection data from an analog signal output from each of the plurality of physical sensors (21 to 23); a signal conversion circuit (54) that converts the detection data into digital detection data as a digital signal; and a serial communication bus (33) that performs data communication with the external device (200) via the connector (10). The serial communication bus (33) outputs a serial signal including the digital detection data.

The application provides a low-power signal amplitude detection and gain control circuit, method and application. The low-power signal amplitude detection and gain control circuit comprises: a controllable gain amplification module, which is used for receiving and amplifying an input signal; a pulse generation and counting module, which is connected with an output end of the controllable gain amplification module and is used for converting the amplified signal into a pulse and outputting a counting value; and a control module, which is connected with the pulse generation and counting module and the controllable gain amplification module respectively; wherein the control module is used for judging the input signal amplitude according to the counting value and maintaining the counting value in a predetermined counting range corresponding to a target signal amplitude by adjusting the gain of the controllable gain amplification module. In the application, the control module analyzes the pulse counting signal amplitude and compares the signal amplitude with an internal predetermined counting range, dynamically adjusts the gain of the amplification module, thereby stabilizes the circuit output in a desired amplitude interval and avoids the phenomenon of "wrong wave".

The application discloses a multi-path fan-out circuit and a clock driver, and relates to the field of clock drivers, which comprises an amplification circuit, a bias circuit and a plurality of LVPECL output circuits, the bias circuit is connected with the amplification circuit and each LVPECL output circuit respectively, and is used for providing current bias and switching signals. The LVPECL output circuit comprises two mirror-symmetrical conversion circuits. The amplification circuit is connected with the LVPECL output circuit, and is used for amplifying a differential input signal and outputting a first level standard signal and a second level standard signal. The LVPECL output circuit is used for converting the first level standard signal and the second level standard signal into a first output signal and a second output signal. The application can realize the function of converting a group of differential input signals into multi-path high-speed data output, and due to the mirror-symmetrical arrangement of the two conversion circuits, the signal output by each conversion circuit can realize low skew when serving as a clock signal.

A consumable level monitoring label apparatus, system and method for physical association with a content-filled consumable to allow for monitoring of a level of the content therein. The apparatus, system and method includes a plurality of labels, each individually manually removable from the label sheet and each comprising: a plurality of electrical conductors forming a sensing module, the sensing module having associated therewith firmware for converting signals associated with the electrical conductors and to an indication of the content level; a communications module for communicating the content level to at least a user display and over at least one network; and a power module for powering at least the sensing module and the communications module. A plurality of perforations are associated with each of the plurality of labels, wherein the plurality of perforations provides for variations in a size of each of the labels upon the manual removal.

The utility model discloses a DAC signal conversion circuit of a DC motor, and belongs to the technical field of motor driving. The circuit comprises a power supply voltage conversion module, an integration unit, a voltage follower module and an analog voltage output module. The output end of the power supply voltage conversion module is connected with the input end of the integration unit, the output end of the integration unit is connected with the input end of the voltage follower module, and the output end of the voltage follower module is connected with the input end of the analog voltage output module; and the voltage follower module is used for isolating the output end of the integration unit from the input end of the analog voltage output module. The DAC signal conversion circuit of the DC motor provided by the utility model realizes an efficient and accurate conversion process from a PWM signal to an analog voltage signal, significantly improves the level conversion and response speed, can flexibly control the output amplitude and stability of the analog voltage signal, has the advantages of simple structure, low cost, high reliability, etc. The method can be widely applied to various fields.

The invention provides a circuit for realizing multi-mode output of an ADC, and the circuit comprises a sampling sub-circuit which collects electric data signals of a plurality of ports; a time division multiplexing circulation sub-circuit sequentially and circularly obtains input signals from the electric data; the ADC is configured to convert the input signal into a digital signal; and the digital processing sub-circuit is configured to process the digital signal according to a set output mode to obtain a calculated value, compare the calculated value with a target configuration value and then output a PWM wave corresponding to the output mode, so that the problems of single output mode, insufficient precision and poor anti-interference capability of a traditional scheme are solved; the method has the advantages of supporting multi-mode output, improving the measurement precision, enhancing the anti-interference capability and realizing efficient time division multiplexing sampling.