97 results about "Waveform shaping" patented technology

According to the repeated impact test device for multiple impact tests and the loading waveform control method, a special-shaped impact rod is adopted to replace a traditional cylindrical impact rod, the end, making contact with the impact rod, of an incident rod is designed into a cone, and the diameter of the end face of the incident rod with the special-shaped end is consistent with that of the end face of the special-shaped impact rod; aiming at the requirements of the tested material and structure on the loading waveform, the waveform with different forms and different rising edges can be realized by designing the cone angle and the shape of a cone or designing a complex curve profile, a multi-segment cone and the like, and the accurate control of the loading waveform is realized; according to the automatic multi-impact test device based on the split Hopkinson pressure bar, the defect that disposable accessories need to be replaced in a traditional waveform shaping control method can be overcome, it is guaranteed that the waveform meets the test requirement during impact loading every time, the amplitude is constant, the waveform is consistent, stable and reliable, the test precision and efficiency are improved, and the test cost is reduced. The device can be applied to automatic multiple impact tests based on the split Hopkinson pressure bar.

A time series of raw performance data samples pertaining to performing of a set of repetitions of a movement by a user is collected from a sensor. A set of features is generated from the collected time series of raw performance data samples, including by extracting one or more waveform shape features. The set of features, including the extracted one or more waveform shape features, is provided as input to a model that outputs an estimate of repetitions in reserve.

The method includes, for example in one embodiment, exposing an odorant to a sensor array having a first sensor and a second sensor respectively configured with a first response characteristic and a different second response characteristic. In one embodiment, in response to the odorant, the first sensor outputs a first sensor signal having a signal-time characteristic and the second sensor outputs a second sensor signal having a different signal-time characteristic due to the different second response characteristic. In one embodiment, the method includes generating a signal having a complex waveform shape corresponding to the odorant, and optionally to a concentration of the odorant, using the first sensor signal and the second sensor signal. The generating includes, for example in one embodiment, converting the first sensor signal and the second sensor signal into respective sensor signal modulated oscillatory signals, and combining the sensor signal modulated oscillatory signals.

The utility model discloses a frequency converter output overcurrent protection circuit comprising a reference power supply circuit used for stably outputting a 5V voltage; the current sampling circuit is used for collecting the IGBT output current and converting the IGBT output current into a voltage signal to be output; the comparison circuit is used for comparing the acquired voltage signal with a set value and then outputting a level signal; and the buffer circuit is used for acquiring the level signal and outputting a VCE signal. According to the frequency converter output overcurrent protection circuit, output current is detected through the current detection circuit, the comparator is used for comparing real-time current values and controlling output overcurrent signals, and the phase inverter is used for carrying out waveform shaping on the output signals, so that the integrity of the signals is ensured.

The invention discloses a photoelectric red envelope acousto-optic cooperative trigger response control method, and belongs to the technical field of photoelectric control, and the method comprises the steps: extracting the ripple content from a filtered signal, comparing the ripple content with a reference value, and obtaining the quantitative representation of the ripple increase amplitude; calculating an excess between the ripple increase amplitude and a preset ripple threshold; and inputting the excess into a dynamic adjustment model to obtain a current-limiting resistance value, a filter capacitor capacity and a shaping circuit time constant of the waveform shaping circuit, and obtaining the stability of the driving current waveform and the repeatability of acousto-optic cooperative starting by iteratively adjusting the current-limiting resistance value, the filter capacitor capacity and the shaping circuit time constant. The core contradiction that the triggering sensitivity and the system stability are difficult to consider in a complex working environment in the existing light source driving technology is solved, and the technical effects of improving the photoelectric triggering accuracy, enhancing the anti-interference capability of the system and ensuring the high repeatability of acousto-optic cooperative starting are achieved.

The application is a divisional application of 202610037205.X, and discloses a signal processing method, device, equipment, system, storage medium and product. A to-be-processed signal output by a target signal after passing through a nonlinear device is processed in sections to obtain a plurality of first signal regions; a preset type determination strategy is used to determine region types to which the plurality of first signal regions correspond respectively, wherein the preset type determination strategy is determined based on a steepness of a waveform shape; for each first signal region, a compensation strategy matched with a region type corresponding to the current first signal region is used to compensate a sub-signal in a corresponding region of the target signal for the current first signal region by using an ideal signal, to obtain a compensation signal corresponding to the current first signal region; and a pre-distortion signal corresponding to the ideal signal is determined according to the compensation signals corresponding to the plurality of first signal regions respectively. The application can provide an effective pre-distortion signal for a signal with complex and changeable forms.

The invention discloses a wireless optical communication system adopting an amplitude limiting amplification method, which relates to the technical field of wireless optical communication and comprises a transmitting subsystem and a receiving subsystem. The transmitting subsystem is used for generating a serial signal, processing the serial signal, converting the serial signal into an optical signal and transmitting the optical signal; and the receiving subsystem is used for receiving and converting the optical signal into a current signal, converting the current signal into a signal in a voltage form, amplifying the signal, performing waveform shaping and effective bandwidth expansion on the amplified signal through the nonlinear amplitude limiting characteristic of a bandwidth expansion module, and decoding and recovering the signal after bandwidth expansion. According to the invention, the bandwidth of the system is directly expanded by using the nonlinear amplitude limiting characteristic of the amplitude limiting amplifier, so that Gbps-level transmission is realized, and the rate bottleneck of the traditional LED system is overcome. Complex transmitting end equalization is not needed, the design is simplified, the robustness is enhanced, and the stability requirement of a satellite-borne environment high-speed link is met.

Since it is difficult to constantly monitor a large number of unused fiber optic transmission lines in an optical submarine cable system, a light source device according to the present invention includes: a light generation unit for generating amplified spontaneous emission light; a light control unit for controlling the band and power of the amplified spontaneous emission light and generating waveform shaping spontaneous emission light; and an optical branching unit for branching the waveform shaping spontaneous emission light into a plurality of branched light beams.

The invention relates to the technical field of ecological environment monitoring and natural resource asset evaluation, and discloses an ecological product value realization and accounting method based on VEP accounting. The method comprises the following steps: setting an ecological self-maintenance reference threshold in a digital grid model; performing time domain waveform shaping on the low-frequency remote sensing data by using the high-frequency environment driving factor, and reconstructing a high-frequency background value; constructing a geographic topological impedance matrix, and performing spatial weighted correction on the instantaneous deviation of the ground monitoring data based on the minimum cumulative resistance distance; a hysteresis comparison logic and a dead zone control mechanism are introduced, and effective output states exceeding a reference threshold value are screened; integral is carried out on the net physical quantity of the effective time period, and when the accumulated value reaches the standard transaction package quota, a digital warrant is generated. According to the method, through space-time dual reconstruction and steady-state screening, the problems of multi-source data frequency mismatch and complex terrain interpolation deviation are solved, and accurate quantification and digital circulation of the ecological overflow value are realized.

The invention belongs to the technical field of integrated circuits, and particularly relates to a level shift circuit applied to a three-phase motor driving chip. According to the circuit, the acceleration function of the high-voltage floating type level shift circuit is realized, and the digital logic gate circuit is used for carrying out waveform shaping on an output signal of the high-voltage floating type level shift circuit and realizing the acceleration function. The level conversion circuit part is a high-voltage floating level shift circuit, and output signals of the level conversion part are finally output by the level shift circuit through a small number of basic logic gates, high-threshold inverters, Schmitt triggers and master-slave RS triggers. The digital logic shaping circuit has the beneficial effects that the problem of overlarge time delay of the whole circuit caused by a Miller platform existing in output signals of a high-voltage floating type level shift circuit is solved, and meanwhile, the problem of waveform logic errors of the output signals caused by delay mismatching of input end signals of an RS trigger of a traditional digital logic shaping circuit is solved.

The application discloses a signal processing method, device, equipment, system, storage medium and product. The application performs partition processing on a to-be-processed signal output by a target signal after passing through a nonlinear device to obtain a plurality of first signal regions, wherein the target signal is related to an ideal signal; a preset type determination strategy is used to determine the region types to which the plurality of first signal regions correspond, wherein the preset type determination strategy is determined based on the steepness of a waveform shape; for each first signal region, a compensation strategy matched with the region type corresponding to the current first signal region is used to compensate and process a sub-signal in a corresponding region of the target signal in the current first signal region by using the ideal signal, to obtain a compensation signal corresponding to the current first signal region; and a pre-distortion signal corresponding to the ideal signal is determined according to the compensation signals corresponding to the plurality of first signal regions. The application can provide an effective pre-distortion signal for a signal with complex and changeable forms.

The present application belongs to the technical field of physiological electrical signal detection, and particularly relates to a physiological electrical signal down-sampling method, which first divides the whole data of a physiological electrical signal into multiple buckets to obtain a set bucket, a front bucket and a rear bucket corresponding to the set data and the front data and the rear data of the set data; for the set bucket, a feature point is used as a sampling point of the set bucket; the first sampling point of the set bucket is used to iteratively obtain the sampling points of the front bucket in sequence; and the last sampling point of the set bucket is used to iteratively obtain the sampling points of the rear bucket in sequence. The waveform shape near the feature point is better retained, the amplitude and the latent period of the feature point after down-sampling are least affected, and the down-sampling distortion of a specific period can be effectively reduced for an induced electrical signal.

This invention relates to integrated circuit technology, specifically an on-chip aging detection circuit and an integrated circuit chip. The invention comprises a signal sampling and processing module, a voltage-controlled oscillator (VCO), and a Schmitt trigger module connected in series. The signal sampling and processing module outputs a temperature-dependent voltage signal to the VCO. The Schmitt trigger shapes the output waveform of the VCO. The VCO is composed of an odd number of identical inverters arranged sequentially. In adjacent inverters, the output of the preceding inverter is connected to the input of the following inverter; the output of the final inverter is connected to the input of the first inverter. This invention can detect the aging degree of a chip at different temperatures, with temperature having minimal impact on the detection results.

The utility model relates to an inductance transmitter, it includes the inductance sensor and signal acquisition and processing circuit of electric connection, signal acquisition and processing circuit includes the LC oscillation circuit, waveform shaping circuit, frequency division circuit and frequency voltage conversion circuit that electric connection in proper order, LC oscillation circuit includes triode Q1, waveform shaping circuit includes comparator U1, frequency division circuit includes the chip U2 of foot 11 node A's junction, frequency voltage conversion circuit includes chip U3, the utility model discloses reasonable in design, compact structure and convenient to use.

The application relates to an ultrasonic transducer self-checking circuit. The ultrasonic transducer self-checking circuit comprises an ultrasonic wave generating module, a self-checking control module and a waveform shaping module. The self-checking control module is used for generating a first enabling control signal, a second enabling control signal and a third enabling control signal based on a self-checking enabling signal and a self-checking clock signal. The ultrasonic wave generating module comprises an ultrasonic transducer, is connected with the self-checking control module and is used for generating ultrasonic waves based on the first enabling control signal and the second enabling control signal. The waveform shaping module is connected with the self-checking control module and the ultrasonic wave generating module and is used for obtaining a square wave signal. The self-checking control module is further used for comparing an aftershock count result with a diagnosis count result when the third enabling signal is at a high level, and generating an alarm signal when the comparison result is abnormal. The ultrasonic transducer self-checking circuit can realize self-checking of the ultrasonic transducer and can timely discover and alarm when the ultrasonic transducer is abnormal.

The application relates to a reflective optical fiber turbine oxygen supply flow detection and avionics conversion system and method, and belongs to the technical field of airborne oxygen supply detection and avionics bus. The system comprises the following: an optical fiber turbine oxygen supply flow detection unit, which is used for rectifying the oxygen supply airflow to be detected and then conveying the airflow to a turbine to drive the turbine to rotate, and collecting a periodic light pulse signal generated by the rotation of the turbine; a signal processing and conversion unit, which is used for converting the periodic light pulse signal into a voltage pulse signal and performing hierarchical processing, and obtaining a calibrated pulse signal after waveform shaping and proportional scaling; a bus conversion unit, which is used for measuring the frequency of the calibrated pulse signal, calculating an instantaneous oxygen supply flow value and converting the value into an ARINC429 protocol data frame; and a driving differential output circuit, which is used for converting the ARINC429 protocol data frame into a differential electrical signal of bipolar return-to-zero code and outputting the signal to an avionics bus network. The application can meet the urgent needs of high-performance aircraft for intelligentization and high reliability of an oxygen supply system.

The application discloses a common-mode conducted electromagnetic interference suppression circuit based on split inductors and split capacitors, which can be applied to a single-phase full-bridge inverter. The application splits input capacitors to construct a neutral point, splits output filter inductors and capacitors, and combines the neutral point to realize voltage clamping. Two auxiliary windings coupled with the split inductors induce a compensation voltage with the same waveform shape as the original noise source and proportional amplitude, and the compensation voltage is injected into an input DC bus through an injection branch composed of four compensation capacitors to counteract common-mode conducted electromagnetic interference in the converter. Under the condition that the filter inductors are ideally coupled with the auxiliary windings, the common-mode conducted electromagnetic interference in the converter can be almost completely counteracted; under the condition that the filter inductors are not ideally coupled with the auxiliary windings, more than 20dB of amplitude attenuation can be provided in the frequency range of 150kHz-5MHz. The components used in the application are all passive components, and the application has the advantages of low cost, small size and good effect.

This invention provides a portable NRD neural response signal generator, comprising: a shell, a display screen, a microcontroller control circuit board, side control buttons, and an input / output connector; the display screen shows the current amplitude of the neural response signal, the output status of the neural response signal, and the battery level; the microcontroller control circuit board acquires the output voltage signal of the electrodes of the cochlear implant and outputs a corresponding simulated neural response signal based on the output voltage signal; the side control buttons are used for power-on operation and selection and confirmation of the neural response signal waveform; the input / output connector is used for programming, battery charging, and signal output. This invention provides equipment support for verifying the accuracy of measuring neural response signals in cochlear implants, solving the problems of high signal interference and insufficient amplitude in existing general-purpose telemetry equipment for measuring neural responses; the waveform shape can be customized, the minimum output waveform amplitude reaches ±50μV, and the waveform is stable and free from external interference.

In certain examples, methods and semiconductor structures are directed to circuit-based apparatus in which an amplifier includes stacked, first and second circuit amplification stages to operate out of phase from one another for providing a push-pull operation, with each of the first and second circuit stages including a switching circuit and an impedance path to drive the switching circuit. The apparatus further includes a waveform-shaping circuit to shape, in response to each of the first and second circuit stages, a voltage signal for presentation to the switching circuit. As may be implemented in various more-specific examples, the apparatus may generate a constant output voltage with high efficiency across a wide range of resistive loads.

The invention discloses a deep geological environment temperature-liquid-gas multi-field coupling dynamic model test device and method, and the device achieves the partition temperature rise and temperature gradient construction through a temperature control module under the triaxial stress condition; the liquid seepage module and the gas loading module are mutually independent and can cooperatively form a flow / gas coupling loop; the dynamic loading system adopts two switchable or combined modes of drop hammer and flexible bag waveform shaping and servo hydraulic quasi-static / low-frequency loading. The monitoring system takes an FBG (Fiber Bragg Grating) sensor, an AE acoustic emission array attached to the inner wall of a loading frame and TDLAS (Tunable Diode Laser Absorption Spectroscopy) gas concentration monitoring as a core to realize nanosecond multi-mode signal synchronous acquisition. The device accords with a stress wave propagation and multi-field cooperative control theory, is feasible in structure, flexible in coupling and high in control precision, can highly restore a deep complex environment, and effectively overcomes the defects of difficult field coupling and poor boundary control of a traditional method, so that the test precision is remarkably improved, and the engineering risk is reduced.

The present disclosure relates to a distance measuring device and a distance measuring method capable of suppressing blur of a moving object. There is provided a distance measuring apparatus including: a light emitting unit that emits irradiation light; and a light receiving unit that receives reflected light obtained by reflecting irradiation light on a target object, the irradiation light having a waveform shape in which N (N is a natural number of 2 or more) modulation frequencies are superimposed; and the light receiving unit separates a ranging signal obtained from the reflected light to each modulation frequency, and outputs distance information by integrating ranging results obtained from the separated ranging signal. The present disclosure can be applied, for example, to a ranging device of an indirect ToF method.

The invention relates to a reflection-type optical fiber turbine oxygen supply flow detection and avionics conversion system and method, and belongs to the technical field of aviation airborne oxygen supply detection and avionics bus, and the system comprises an optical fiber turbine oxygen supply flow detection unit which is used for rectifying to-be-detected oxygen supply flow and then conveying the rectified to-be-detected oxygen supply flow to a turbine to push the turbine to rotate, collecting a periodic optical pulse signal generated by rotation of the turbine; the signal processing and converting unit is used for converting the periodic optical pulse signal into a voltage pulse signal, performing stage processing on the voltage pulse signal, and performing waveform shaping and scaling to obtain a calibration pulse signal; the bus conversion unit is used for measuring the frequency of the calibration pulse signal, calculating to obtain an instantaneous oxygen supply flow value and converting the instantaneous oxygen supply flow value into an ARINC429 protocol data frame; and the driving differential output circuit is used for converting the ARINC429 protocol data frame into a differential electric signal of a bipolar return-to-zero code and outputting the differential electric signal to an avionics bus network. According to the invention, the urgent requirements of high-performance aircrafts on intelligence and high reliability of the oxygen supply system can be met.

The embodiment of the utility model provides a kind of drive signal interlock module, drive assembly and hybrid power device, wherein, drive signal interlock module includes: first primary interlock circuit, first primary interlock circuit includes first high-speed photoelectric coupler, first capacitor and first resistance;Second primary interlock circuit, second primary interlock circuit includes second high-speed photoelectric coupler, second capacitor and second resistance;First signal source and second signal source are complementary pulse width modulation signals;Secondary interlock circuit, secondary interlock circuit includes six-channel inverter, the first pin of six-channel inverter is connected first primary interlock circuit, the thirteenth pin of six-channel inverter is connected second primary interlock circuit.The scheme of the utility model, through the collaborative design of two primary interlock circuits and secondary interlock circuit, realize the hardware level interlock protection and signal waveform shaping of complementary PWM signal.

This invention relates to the field of gate drive circuit technology and discloses a gate drive circuit with adjustable pull-in / pull current capability, including a first-stage level shift circuit, a second-stage level shift circuit, a signal shaping and enhancement circuit, and a configurable push-pull output circuit. The first-stage level shift circuit generates a clamping voltage rail to limit the signal swing; the second-stage level shift circuit converts the ground potential logic signal into a high-voltage floating signal; the signal shaping and enhancement circuit performs waveform shaping and power amplification on the signal. The configurable push-pull output circuit includes multiple parallel push-pull drive branches, divided into normally-operated basic drive branches and optional drive branches controlled by digital signals. This invention dynamically adjusts the total equivalent channel width of the output stage transistor by changing the number of parallel branches in operation, providing a large current to reduce losses when driving large loads and limiting the current to suppress electromagnetic interference when driving small loads, thus achieving flexible adaptation of drive characteristics to load requirements.

The invention relates to a magnetic flux modulation type high-intensity magnetic field measuring device and method based on self-reference, and relates to the field of metering and testing instruments. Comprising the steps that a motor drives a transmission shaft to control an induction coil to rotate in a strong magnet, two paths of homologous and synchronous induced electromotive force E1 are generated, the induced electromotive force E2 is output through a twisted pair in a conductive slip ring and input into a first signal conditioning module and a second signal conditioning module respectively, and the conditioned induced electromotive force E1 is input into a precise voltage division network for voltage division; the induced electromotive force after voltage division is input into a lock-in amplifier reading system through a first voltage follower to serve as a signal to be measured; the conditioned induced electromotive force E2 is synchronously input into a waveform shaping circuit to be converted into a square wave signal with a fixed amplitude value, the square wave signal after conversion is input into a phase-locked amplifier reading system through a second voltage follower to serve as a reference signal, and the phase-locked amplifier reading system carries out data reading on the induced electromotive force. According to the invention, the problem that the high-intensity magnetic field is difficult to accurately measure and trace is solved.

According to some embodiments, a system includes: a first neuron configured to generate a first firing waveform; a second neuron configured to generate a second firing waveform; an electrochemical ionic (EIS) synapse; and a circuit electrically connecting the first and second neurons via the EIS synapse and configured to modulate conductivity of the electrical connection provided by the EIS synapse based on relative timing of the first and second firing waveforms. The waveform shapes can be selected to implement a spike-timing-dependent plasticity (STDP) learning rule in the EIS synapse.

The invention provides a short-distance friend machine link instant identification method based on a Kolmogorov-Arnold network. The method comprises the following steps: receiving an array broadband baseband signal on site and carrying out channel time alignment; performing time-frequency occupancy detection on the broadband array data, and segmenting according to a burst boundary to obtain candidate link segments; the MUSIC arrival angle is calculated for the fragment in a windowing mode, an arrival angle track is formed, the direction stability is calculated and compared with a threshold value, and direction stability gating is carried out; extracting a starting waveform shape, a short-time carrier offset and a power fluctuation rhythm in the fragment through the fragment, and splicing into a link characteristic time sequence; inputting the data into a Kolmogorov-Arnold network to generate a link representation vector, fusing direction stability in a confidence degree judgment head, and outputting a friend machine recognition result in combination with a similarity threshold value of a registered friend machine feature library; generating an avoiding frequency band and an avoiding direction range and restraining a suppression frequency band and a transmitting direction of the countering equipment; according to the method, the reliability of instant identification and avoidance configuration of the friend machine link can be improved.

This invention provides a dynamic clock compensation device and method for a time-transfer receiver, comprising an adaptive amplification unit, a waveform shaping unit, an FPGA-based time-to-digital converter, and a data processing unit. The 1PPS signal generated by the GNSS receiver serves as the START signal, and the 1PPS signal from the external clock serves as the STOP signal. Both signals pass through the adaptive amplification unit and the waveform shaping unit, respectively. The shaped 1PPS signals are then sent to the FPGA-based time-to-digital converter to be converted into digital count values. These count values ​​are then sent to the data processing unit, which calculates the time difference between the two 1PPS signals based on the counting frequency. Finally, the time difference is multiplied by the speed of light to convert it into a distance value, which is then used to compensate for the pseudorange measured by the GNSS receiver.

The invention discloses a frequency correction algorithm for a non-stationary signal, which is characterized in that a signal chain is specially designed, an original target non-stationary signal is divided into two paths after passing through a signal conditioning circuit, one path of signal x1 (t) is directly input to an analog-to-digital converter, and a discrete time domain signal x (n) is obtained after sampling by the analog-to-digital converter; the other path of signal passes through a waveform shaping circuit, a non-stationary signal is converted into a unipolar square wave digital signal x2 (t), the signal enters a digital processor with pulse capture and timer technical functions as a digital signal, and the digital processor can obtain a frequency value fc of the signal x2 (t) after passing through the waveform shaping circuit by adopting an equal-precision frequency measurement method; fc is defined as coarse frequency. Under the condition that all original time domain information of the signal is reserved, the judgment coefficient gamma is calculated by dividing frequency spectrum and power spectrum intervals, and the corresponding frequency correction formula is selected according to the value range of the judgment coefficient gamma, so that the accurate frequency correction of the non-stationary signal is realized, and the data measurement accuracy is improved.

This invention proposes an auxiliary winding-type common-mode conducted electromagnetic interference (EMI) reverse cancellation circuit based on a Boost inductor, applicable to Boost converters. This invention is based on the drain-source voltage vo of the internal power MOS in the Boost converter. DS This involves understanding its conducted electromagnetic interference noise source, and constructing an auxiliary winding coupled with a power inductor to connect with v. DS Compensation voltages v with the same waveform shape and proportional amplitude comp Through two compensation capacitors C comp1 With C comp2 Injecting compensation current reverses and cancels common-mode conducted electromagnetic interference (EMI) within the converter. Under ideal coupling conditions between the power inductor and auxiliary winding, this invention can completely cancel EMI within the converter; under non-ideal coupling conditions, it can provide amplitude attenuation exceeding 20dB, with a maximum of 40dB, within a frequency range of 150kHz-5MHz. This invention uses only three passive components, offering advantages such as simple structure, small size, low cost, and easy integration.