927 results about "Signal amplifier" patented technology

The invention discloses an offshore wind turbine blade online monitoring method based on voiceprint recognition, which belongs to the field of wind turbine blade acoustic signal analysis, and comprises the following steps: acquiring wind turbine voiceprint data, weather condition data and wind turbine generating capacity data, and constructing a signal processing model; the collected voiceprint signals are subjected to denoising, amplification and feature extraction through a signal amplifier, a filter and a feature extraction unit, a deep learning model is constructed, voiceprint signal parameters, weather data and wind turbine generating capacity are imported into the deep learning model to evaluate future wind turbine blade cracks, a crack evaluation model is constructed, and the wind turbine blade cracks are evaluated. And importing the crack sound source position, the crack depth, the crack length and the estimated damage score into a crack evaluation model to evaluate the crack degree of the fan blade under the future weather condition, grading the fan cracks according to the crack damage score, and giving an alarm. The early warning of the future crack condition of the fan blade is realized by combining the voiceprint signal of the offshore fan blade, the weather condition and the generating capacity.

The invention provides a method for testing the dynamic strain of the surface of a rotating body in an electromagnetic environment. The method comprises the following steps: constructing a bridge by using strain gauges and acquiring dynamic characteristic data of the rotating part under actual constraint conditions; performing simulation calculation according to the dynamic characteristic data, and determining the optimal pasting position of the strain gauge; pasting a strain gauge and formulating a wiring scheme of a strain gauge wire; the strain gauge is connected with a voltage signal amplifier, the amplified signal is connected with a data acquisition system through a conductive slip ring, and the amplified strain signal is recorded and processed; acquiring strain signals in real time and taking the strain signals as test data, and performing whole-course test in a full-rotating-speed range to complete dynamic strain test on the surface of the rotating body. The system has high sensitivity, the sensitivity and the measurement precision of the system are improved through full-bridge configuration, larger output signals are provided, the full bridge can achieve temperature compensation through symmetrical circuit design, and the system has good linear output characteristics and facilitates signal processing and analysis within the strain range.

The invention relates to the technical field of battery testing, and provides a flow battery bipolar plate flow channel diversion performance testing device, which comprises an intelligent testing galvanic pile, which is composed of a plurality of detachable flow channel units, each flow channel unit comprises a bipolar plate and two flow channel frames, the flow channel frames adopt a modular design, and the flow channel units are connected with the intelligent testing galvanic pile; a plurality of micro pressure sensors, temperature sensors and flow sensors are embedded in the shell; the intelligent liquid path system comprises a plurality of independent liquid path circulating units, and each unit is composed of a liquid tank, an intelligent liquid pump, a liquid supply pipeline and a liquid return pipeline; a plurality of independent test chambers are arranged in the multifunctional shell, and a temperature and humidity control system and an intelligent drainage system are arranged in the shell; and the data acquisition and analysis system consists of a high-performance computer, a data acquisition card, a signal amplifier and analysis software. The problems that in the prior art, the local flow characteristic of the electrolyte on the surface of the carbon felt is difficult to accurately evaluate, and the requirement of optimizing flow channel design on refined data cannot be met are solved.

The utility model discloses an ear canal embedded hearing aid, which relates to the technical field of medical instruments, and comprises a bearing assembly, the bearing assembly comprises a first packaging shell, a second packaging shell and a filter screen, a signal processing piece and a lithium battery are respectively arranged in the first packaging shell, and the second packaging shell is provided with a second packaging shell. The signal processing piece comprises a signal amplifier, a filter and a central processing unit, and a micro air pump, a control switch, a potentiometer and a microphone are installed on the right side of the first packaging shell. The beneficial effects of the utility model are that through the arrangement of the miniature air pump, the air delivery pipe and the expansion anti-skid assembly, when the ear canals of different users have large differences or need to be worn stably, the miniature air pump can be controlled to work, so that air enters the hollow rubber ring through the air delivery pipe and the delivery pipe, and the hollow rubber ring is gradually expanded to be in contact with the ear wall; therefore, the wearing stability of the bearing assembly is ensured, and the sound definition after conversion of the receiver is ensured.

The invention relates to a plurality of multifunctional combustion controllers, each multifunctional combustion controller comprises an MCU, a communication port, a logic port, an input port and an output port, the communication port, the logic port, the input port and the output port are all connected with the MCU, the input port is used for receiving state information of UV ultraviolet light flame detection and ionization flame detection, and the logic port is used for receiving state information of UV ultraviolet light flame detection and ionization flame detection. The output port is used for driving the ignition transformer, the small fire valve, the main fire gas valve, the main fire air valve and the smoke exhaust valve to be opened / closed, and each multifunctional combustion controller is connected with the central control unit. The multifunctional combustion controller has the advantages that the multifunctional combustion controller integrates two paths of independent flame detection modes, has two functions of UV flame detection and ionization type flame detection, is suitable for three working modes of UV flame detection, integrated electrode flame detection and independent electrode flame detection, and can be connected to two flame detection interfaces of the MFCC for burners with two sets of flame detection, so that the flame detection efficiency is improved. And a flame detection signal amplifier does not need to be additionally configured.

A system may include a digital front end (DFE). The DFE may be configured to generate a command signal. The system may also include a sweeper. The sweeper may be configured to generate an intermediate in-phase signal, an intermediate quadrature signal, and a LO signal based on the command signal. In addition, the system may include a mixer. The mixer may be configured to generate a mixed in-phase signal based on the intermediate in-phase signal and the LO signal. The mixer may also be configured to generate a mixed quadrature signal based on the intermediate quadrature signal and the LO signal. Further, the system may include an amplifier. The amplifier may be configured to generate an in-phase signal based on the mixed in-phase signal and an amplification setting. The amplifier may also be configured to generate a quadrature signal based on the mixed quadrature signal and the amplification setting.

An amplifier circuit includes a carrier amplifier connected between a signal input terminal and a signal output terminal, a peak amplifier connected between the signal input terminal and the signal output terminal, a first phase shift circuit connected between the carrier amplifier or the peak amplifier and the signal output terminal, an auxiliary amplifier connected between the signal input terminal and the carrier amplifier, and a second phase shift circuit connected between the signal input terminal and the carrier amplifier.

The invention relates to a binding head device, a mounting method and die bonding equipment. The binding head device is used for picking up a chip and mounting the chip on a substrate, and comprises a force control detection module, a force control driving module and a mounting module; the force control detection module comprises a reference block, a photoelectric sensor and a signal amplifier, and the signal amplifier is in signal connection with the photoelectric sensor; the mounting module comprises a main shaft and a main shaft seat, the main shaft penetrates through the main shaft seat and can lift relative to the main shaft seat, and the working end of the main shaft is exposed out of the main shaft seat; the top end of the reference block is connected with the force control driving module; the bottom end of the reference block is connected with the transmission end of the main shaft; the photoelectric sensor is arranged on the spindle seat, one end of the photoelectric sensor emitting a light source extends into the spindle seat, the other end of the photoelectric sensor is connected to the signal amplifier, and the photoelectric sensor can emit the light source to the top end face of the reference block. And when the chip is in contact with the substrate, the signal amplifier determines the height variation of the reference block by detecting the light quantity variation reflected and received by the light source.

The invention relates to a fault detection method and system suitable for a vehicle body provided with a retarder, and relates to the technical field of vehicle body fault detection. The method comprises the following steps: acquiring and detecting a vehicle body state signal of a vehicle body; vehicle body dynamic signals of a vehicle body are obtained and detected; and accessing a buffer and enabling the retarder to enter a test mode to test the function of the retarder. The fault detection system is composed of a controller, a speed signal detection unit, a signal amplifier and a power supply unit which are connected with one another to work cooperatively. According to the method, the effects of comprehensively detecting the fault of the vehicle body provided with the retarder, effectively positioning the fault position and evaluating the fault condition are achieved.

The invention discloses a nonlinear dielectric constant measuring system based on a scanning nonlinear dielectric microscope, comprising: a probe, one end of which forms a micro capacitance Cs with the upper surface of a sample to be tested; the low-frequency signal module applies a low-frequency signal to the lower surface of the to-be-tested sample; the other end of the probe is connected with an LC resonance circuit in the probe module; the output end of a signal amplifier in the probe module is connected with a frequency modulation demodulator; the frequency modulation demodulator demodulates the frequency signal modulated by the probe module, removes a high-frequency carrier signal, inputs the demodulated signal into the lock-in amplifier, and detects, separates and amplifies a high-signal-to-noise-ratio signal by taking the frequency of a low-frequency signal applied to the sample to be tested as a reference frequency; according to the measurement system, the detection speed, the service life of the probe and the multi-material applicability can be remarkably improved, meanwhile, the thermal disturbance effect is inhibited, and a reliable solution is provided for accurate characterization of nano electronic devices.

A multi-winch connecting oil way comprises a variable pump station, an oil tank, a first signal amplifier and more than three executive components, feedback oil ways are further connected among the executive components and comprise an LS feedback oil way, an LX feedback oil way and an LY feedback oil way, the LS feedback oil way of the head executive component is connected with the control end of the first signal amplifier, and the LX feedback oil way of the head executive component is connected with the control end of the second signal amplifier. The LS feedback oil way and the LX feedback oil way of every two adjacent execution elements are connected, the LS feedback oil way and the LX feedback oil way of each independent execution element are connected in the corresponding execution element through a valve, and the LY feedback oil ways of the head execution element, the middle execution element and the tail execution element are connected together in parallel. The control signal feedback oil paths LY among the plurality of executive components are connected in parallel, so that the pressure differences among the executive components are consistent, and a certain executive component can be accurately controlled independently.

The invention discloses a personal dosimeter capable of nuclide identification, and the dosimeter comprises a scintillation detector which is composed of a scintillation crystal and SiPM and captures an energy spectrum signal of a ray; the signal amplifier receives the voltage signal output by the SiPM and preprocesses and amplifies the voltage signal; the multichannel analyzer is used for receiving the amplified signal output by the signal amplifier and realizing energy spectrum acquisition in a target energy range; and the MCU receives the signals acquired by the multichannel analyzer and performs energy spectrum analysis. According to the invention, the scintillation detector based on SiPM and scintillation crystals is used, so that the small size and high sensitivity of the personal dosimeter are realized; according to the multi-channel analyzer, the multi-channel analyzer capable of setting the energy range is realized through the ADC and the comparator, and the design of a peripheral circuit is extremely simplified; the simplified nuclide identification method is designed based on prior information, the range of a nuclide library is narrowed, and the requirements of nuclide identification in a specified application scene for the computing power of a system and the complexity of an analog circuit are further reduced.

The invention relates to a vacuum gauge matching circuit for measuring a capacitance value by using double pulse signals and a measurement method, belongs to the field of vacuum gauges, solves the problem of low measurement accuracy caused by reading drifting and temperature drifting in the prior art, and comprises a pulse signal generator, a signal amplification circuit and a signal processing module, wherein the pulse signal generator is used for generating pulse signals which are respectively connected to an annular electrode and a circular electrode of a fixed electrode of the vacuum gauge and connected to the signal processing module; the signal amplification circuit comprises a first signal amplifier and a second signal amplifier which are used for respectively obtaining electric signals on an annular electrode and a circular electrode of a fixed electrode of the vacuum gauge and respectively amplifying the obtained electric signals; and the signal processing module is used for processing the two paths of electric signals output by the signal amplification circuit and the pulse signal, and calculating the vacuum degree based on a processing result. Simple and accurate vacuum degree measurement is realized.

The present invention discloses an online monitoring method for offshore wind turbine blades based on voiceprint recognition, which belongs to the field of acoustic signal analysis of wind turbine blades. The present invention obtains wind turbine voiceprint data, weather condition data and wind turbine power generation data, constructs a signal processing model, denoises, amplifies and extracts features of the collected voiceprint signal through a signal amplifier, a filter and a feature extraction unit, constructs a deep learning model, imports voiceprint signal parameters, weather data and wind turbine power generation into the deep learning model to evaluate future wind turbine blade cracks, constructs a crack assessment model, imports crack sound source position, crack depth, crack length and estimated damage score into the crack assessment model to evaluate the degree of wind turbine blade cracks under future weather conditions, classifies wind turbine cracks according to the crack damage score and gives an alarm, and realizes early warning of future wind turbine blade cracks by combining the voiceprint signal, weather condition and power generation of offshore wind turbine blades.

The invention discloses a design method of a novel pulse power supply. The method comprises the design and architecture relation of circuits such as a switching power supply module, a numerical control processing unit, a pulse waveform generator, a signal amplification and power amplifier, a negative feedback sampling circuit and an output measurement circuit. The numerical control processing unit carries out digital synthesis according to input pulse parameters to generate pulse waveforms, the pulse waveforms are output after passing through the signal amplifier and the power amplifier, the feedback sampling circuit carries out real-time sampling on voltage and current of the pulse power supply and inputs the voltage and current to the numerical control processing unit, and the numerical control processing unit carries out closed-loop control. And high-precision pulse power supply output is achieved. Different from single-bridge or double-bridge switch chopping of an output part of a traditional pulse power supply, the method has the advantages that pulse signals output by the method are accurate and controllable, positive and negative pulse signals are under closed-loop control of a circuit, zero points of output pulses are accurate and do not deviate, small signals are accurate, pulse edges are neat, expansion is easy, and cost is low.

The invention discloses an oil and gas pipeline sand content test sound wave optical fiber sensor, and particularly relates to the technical field of sensors, which comprises a rare earth doped silicon dioxide optical waveguide sheet, a vibration transduction structure, a phase shift waveguide grating and a phase shift wave. The device further comprises a photoelectric converter, a signal amplifier, a filter, a fragrance clamping filter and a vibration signal detector. The rare earth doped silicon dioxide waveguide sheet is located on the vibration transduction structure, and the phase shift waveguide grating is inscribed in the rare earth doped silicon dioxide waveguide sheet. The micro-vibration optical chip sensor based on the photoacoustic spectrum is simple and firm in structure, easy to manufacture and convenient to integrate with other systems, and the problem of integration of a traditional optical fiber distributed sensing system can be effectively solved.

The invention relates to the technical field of intelligent network connection equipment, in particular to intelligent network connection equipment with an antenna strengthening function, which comprises an equipment main body box and a circumferential rotating mechanism, a control box is mounted in the equipment main body box, an electric telescopic rod is connected to the top of the equipment main body box, and a mounting block is mounted at the top of the electric telescopic rod; a first bevel gear and a second bevel gear which are meshed with each other are rotatably mounted on the inner top surface of the mounting block, a moving ring is connected to the top of the mounting block, an antenna body is connected to the interior of the moving ring, and the circumferential rotating mechanism comprises a linkage gear and a driving gear which are meshed with each other. According to the intelligent network connection equipment with the antenna strengthening function, the inclination and rotation angles of the antenna body are adjusted through the strength of signals received by the sensor in the controller, the use effect of the antenna is strengthened in cooperation with the signal amplifier, and the overall signal receiving capacity of the intelligent network connection equipment is improved.

The invention discloses a deep and far sea image transmission method, which comprises the following steps of: increasing redundant information and effectively improving the reliability of data transmission by adopting a Reed-So lomon coding scheme through a forward error correction (FEC) coding technology, and particularly, testing by simulating a deep and far sea transmission condition in a long-distance and severe environment. The robustness under packet loss interference in the transmission process is ensured, the integrated signal amplifier and filter enhance the signal strength, filter the noise, improve the quality and efficiency of image return, monitor the signal frequency of a transmission link in real time and dynamically adjust the algorithm, can deal with interference in time, and ensure the integrity of data packets and the transmission continuity. According to the invention, the performance and reliability of deep and far sea image transmission are significantly improved, and stable return of sea target images is ensured.

The invention discloses an adapter for a vehicle-mounted bus and a detection device of the adapter, and relates to the technical field of electronic product detection, the adapter comprises a device body, a dynamic self-adaptive regulation and control assembly is installed on the inner side of the device body, and a universal interface communication end is installed on the surface of a side shell of the device body. The data transmission efficiency and the adaptive capacity of the system to different devices and different load conditions are greatly improved, signals are monitored in real time through the high-speed oscilloscope chip and the spectrum analyzer chip, the intelligent decision microcontroller adjusts the quantum signal amplifier and the coordination filter in time according to the monitoring result, the stability and accuracy of communication signals are ensured, and the reliability of the system is improved. And when the adapter encounters electromagnetic interference, the adaptive anti-interference antenna array can adjust parameters, enhance the anti-interference capability and guarantee stable communication, an integrated design is integrally formed, and all the modules work cooperatively, so that the adapter can quickly adapt to complex working conditions and changes.

The bisphenol A tar light component recovery device comprises a preheater, a condenser, a circulating water tank, a circulating water pump, a storage tank, a temperature sensor, a controller, a signal amplifier, a knockout pump, a heat conduction pipe, a circulating water inlet pipe, a circulating water outlet pipe and a heat valve, by means of condensation recovery, residual phenol in bisphenol A tar is fully utilized, the heat conduction pipe is used for heating circulating condensate water through waste heat of the preheater, low-temperature caking of phenol is effectively avoided, the waste heat of the preheater is fully utilized, waste discharge is reduced, and the production cost is reduced.

The invention relates to a dynamic ripple elimination circuit for a linear Hall signal amplifier, and belongs to the technical field of circuits. The dynamic ripple elimination circuit for the linear Hall signal amplifier comprises a ripple extraction network, a fully differential integrator, a chopper and a disappearance tone buffer which are connected in sequence, and the ripple extraction network extracts ripple signals in output signals of the amplifier; and through integration, chopping and buffering, a compensation signal for eliminating ripples is generated and injected into a main loop of the amplifier, and the ripples in an output signal of the linear Hall signal amplifier are eliminated. Therefore, a low-pass filter does not need to be adopted at the rear stage, adverse effects on the bandwidth are avoided, and the circuit is simple in structure and quite wide in application range.

The invention discloses an anesthesia target control intelligent infusion pump controller based on electroencephalogram parameter feedback, and relates to the technical field of medical anesthesia. The medicine injection pump comprises a medicine injection pump body, the top of the medicine injection pump body is fixedly connected with a TCI controller, one end of the TCI controller is fixedly connected with a signal amplifier, the input end of the signal amplifier is fixedly connected with a wire, one end of the wire is fixedly connected with a scalp electrode, and one end of the medicine injection pump body is provided with a clamping plate. A scalp electrode is matched with a wire and a signal amplifier to transmit an electroencephalogram signal of a patient to a TCI controller for analysis, so that the TCI controller controls the dosage input into the body of the patient by a medicine injection pump body in real time, and meanwhile, a temperature control assembly is used for adjusting according to the temperature of medicine output in an injector; the pump speed of the medicine and the temperature when the medicine is input into the body of a patient reach the optimal state, so that the dosing accuracy of the device is effectively improved, and the anesthesia quality in an operation is improved.

A dynamic high-resolution ADC according to an example embodiment may include a dynamic amplifier configured to amplify, by as much as a first gain, the sampled-and-held analog signal received from the sample and hold circuit; DAC configured to convert a digital signal input from a decoder into an analog signal; a residue signal amplifier connected to the dynamic amplifier and the DAC and configured to calculate a difference between an output signal of the dynamic amplifier and an output signal of the DAC and amplify the difference by as much as a second gain; an ADC connected to the residue signal amplifier and configured to convert an output signal of the residue signal amplifier into a digital signal; and a decoder connected to the ADC and configured to decode, into digital data, an output signal of the ADC input by the ADC.

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 discloses a motor insulation leakage current segmentation variable gain amplification circuit and a measurement method, and the method comprises the steps: converting a sine AC leakage current with a wide detection range into a sine AC voltage signal through a zero-flux leakage current sensor, and converting the sine AC voltage signal into a DC voltage signal through an AC signal amplifier and a full-wave rectification sine effective value circuit; a leakage current analog signal in a normal working range of a digital / analog converter (ADC) module of a digital signal processor (DSP) and a marking signal for marking an interval in which the magnitude of the leakage current is positioned are obtained through an online segmented variable gain amplification circuit consisting of an integrated operational amplifier, an integrated voltage comparator, a relay and the like; therefore, accurate restoration of the effective value of the original wide-range leakage current can be realized in a DSP (Digital Signal Processor) program through the marking signal of the interval where the leakage current is located and the sampling value of the leakage current.

An electroencephalogram measurement device (1), comprising a support (10) on which the following components are attached and / or integrated: at least one electrode (2) for measuring EEG signals from a user (U); and at least one shielded cable (3), electrically connected to the at least one electrode (2), for transporting the EEG signals to an electrical signal amplifier (A); wherein the at least one electrode (2) and the at least one shielded cable (3) are made of threads and / or textiles. Process for manufacturing an electroencephalogram measurement device (1) whose sensor layer is partially or integrally made with threads and / or textiles.

An amplification oil way of a winch comprises a variable pump station, an oil tank, executive components, a valve body assembly and a first signal amplifier, the input end of the variable pump station is connected with the output end of the oil tank, the output end of the variable pump station is connected with the input end of the first signal amplifier and the input ends of the executive components, and the valve body assembly is connected with the executive components. Feedback oil ways are arranged on the valve body assemblies, every two adjacent feedback oil ways are connected in series, the feedback oil way of one valve body assembly is connected with the control end of the first signal amplifier, and the output end of the first signal amplifier is connected with the control end of the variable pump station. And the reaction time between execution elements is too long.

A loudspeaker assembly for emitting an acoustic signal in or on a vehicle comprises a loudspeaker (2) for emitting the acoustic signal based on an electrical output signal (SA), a control unit (3) for generating an electrical input signal (SI), an amplifier unit (4) for generating an electrical amplifier signal (SO) based on the electrical input signal (SI), and a filter circuit (5) for generating the electrical output signal (SA) based on the electrical amplifier signal (SO). The control unit (3) is configured to determine the integrity state of the loudspeaker (2) during operation of the loudspeaker assembly based on a signal at the amplifier unit (3) and / or at the filter circuit (5).

The invention discloses a recommendation system based on user behavior analysis, and relates to the technical field of artificial intelligence and information recommendation, and the system comprises a front-end signal acquisition module, a layered pulse processing module, a differential signal amplification module and a recommendation strategy generation module. User behaviors are divided into three levels of millisecond-level instantaneous pulse, minute-level behavior wave and hour-level trend flow, and the relevance of behavior mutation of each level is extracted through a differential signal amplifier, so that the system can sensitively capture behavior changes of a user under different time scales, accurately insight into instant interests and long-term demands of the user, and improve the user experience. The system can quickly find the attention of a user to specific contents through millisecond-level instantaneous pulse analysis, and further understand the behavior preference and potential requirements of the user by combining the analysis of minute-level behavior waves and hour-level trend flow.

The present disclosure relates to a TWS headphone assembly capable of selectively performing a TES treatment function. The TWS headset assembly may include a Bluetooth communication module, a memory, a decoder, a digital-to-analog converter, an audio amplifier, a speaker unit, and a controller controlled by a user interface configured as a circuit housed in each of housings of a pair of left and right headsets electrically separated from each other, the assembly further including: a frequency generator coupled to the Bluetooth communication module, the memory, the decoder, the digital-to-analog converter, the audio amplifier, the speaker unit, and the user interface; the TES signal generator is configured to generate a low-frequency signal of TES treatment; a TES signal amplifier configured to amplify the generated low frequency signal, the frequency generator and the TES signal amplifier being disposed on one of the pair of left and right earphones; an electrode provided on an outer surface of a housing of each of the pair of left and right earphones for electrically contacting a skin of an ear of a user; and a pair of female connectors disposed in housings of the pair of left and right earphones and a connection cable electrically and selectively connecting and disconnecting the pair of female connectors, whereby a sound listening function and a TES treatment function can be selectively or together performed.