4085 results about "Single chip" patented technology

The invention provides a valve actuator dispatching control method and system based on AI intelligence, and relates to the technical field of industrial automation control, and the method comprises the steps: collecting the running state parameters of a steam turbine in real time, determining the relation between the steam inlet amount and the valve opening degree under the current working condition to obtain a preliminary valve opening degree estimated value, and carrying out dynamic response compensation; the method comprises the following steps: carrying out comprehensive coupling analysis on a theoretical valve opening value and mechanical parameters such as response time, inertial parameters and an opening limit threshold value of a valve actuator, calculating a dynamic adjustment weight and carrying out boundary constraint processing to obtain a processed parameter, and calling a preset valve opening-silicon controlled trigger angle nonlinear mapping model in a single chip microcomputer based on the parameter; and calculating a final silicon controlled trigger angle by inquiring adjacent data points and a linear interpolation method. By fusing intelligent prediction, multi-dimensional adjustment and a closed-loop feedback mechanism, the valve control precision and response speed are improved, and efficient and intelligent operation of industrial automatic control is achieved.

The invention provides an SF6 digital density meter based on multi-parameter acquisition and automatic temperature compensation and a control method thereof, the SF6 digital density meter is provided with a density meter display, a detection docking port is arranged below the SF6 digital density meter, the digital density meter is internally provided with a multi-parameter acquisition module and a temperature and pressure arrangement module, and the multi-parameter acquisition module and the temperature and pressure arrangement module are connected with the SF6 digital density meter display. The multi-parameter acquisition module and the temperature and pressure arrangement module are electrically connected with the single-chip microcomputer. And a detection docking port of the SF6 digital density meter is directly and completely contacted with SF6 gas. High concentration of physical quantity acquisition components is realized, and the physical quantity acquisition components are directly and fully contacted with the SF6 gas in the gas chamber, so that accurate acquisition of physical quantities such as actual temperature, pressure and micro water of the SF6 gas for temperature compensation is ensured. Meanwhile, practical improvement is carried out on an existing disclosed SF6 density algorithm model, and an algorithm model with better convergence is obtained.

The invention relates to the technical field of embedded data storage, and discloses a method and a system for prolonging the service life of a FLASH simulation EEPROM (Electrically Erasable Programmable Read-Only Memory) in a single chip microcomputer, and the method comprises the following steps: firstly, initializing the FLASH, dividing the FLASH into a main data area, a mapping table area, a backup area and a transaction log area, selecting a physical block through a dynamic wear leveling algorithm when data is written, and writing the data into a database; the method comprises the following steps of: starting a backup area or a transaction log area, safely updating a mapping table by using a transaction mechanism, performing cyclic redundancy check when reading data, if the cyclic redundancy check fails, starting cascade recovery from the backup area or the transaction log area, and finally, updating a transaction log to record operation so as to form a closed-loop management process. According to the invention, through a set of dynamic wear leveling and data classification management mechanism, global and uniform distribution of the write load in the storage array is realized, the physical block with the least erasing times is selected during writing, the access frequency of the data can be identified, and cold data which is not changed frequently can be actively migrated.

The wireless RF semiconductor system is described for use in wireless communication devices that operate in frequency range from 6 GHz to 100 GHz. The system comprises of at least one RF antenna and at least one active RF component fabricated (or built) on the same semiconductor substrate inside a one single packaged module. The wireless RF semiconductor system is described in a variety of different configurations with its functionality divided up over several single chip circuits. The system simplifies assembly, reduces size and cost, and allows for a quick time to market, while maximizing the RF performance demanded by fixed and mobile 4G, 5G and other wireless standards.

The invention discloses a wireless heart rate monitoring and short message alarm method based on an Arduino single-chip microcomputer, and particularly relates to the technical field of heart rate monitoring, which comprises the following steps: acquiring environment and user activity information through a multi-source sensor, acquiring a heart rate data priority according to an environment risk score and user activity intensity, and sending the heart rate data priority to the Arduino single-chip microcomputer; future environment and activity conditions are predicted based on the long short-term memory network, sampling frequency and transmission strategies are adjusted in advance, prospective intervention on potential risks is achieved, practicability, accuracy and reliability of the heart rate monitoring system are improved, and the heart rate monitoring system is suitable for wide health monitoring scenes; when the heart rate abnormity is compared with the threshold value, multi-level alarm is triggered, the high-frequency sampling energy consumption of the sensor can be reduced, the data transmission path is evaluated and optimized in combination with the network reliability, the abnormity detection precision and stability are remarkably improved, and the problems that the abnormity is difficult to recognize in time and the power consumption is too high in a single heart rate sensor in a complex environment are solved.

The invention provides a novel clock control method and system based on FPGA, and relates to the technical field of signal processing. The system provided by the invention comprises: a VCXO voltage-controlled crystal oscillator, a digital-to-analog converter, a PLL phase-locked loop module, a DDMTD measurement module and an adaptive clock control module. The phase-locked loop is implemented, a phase detection algorithm and a clock control algorithm are executed based on a single FPGA chip, and the hardware design complexity is low. The invention uses a digital dual-mixing time difference method (DDMTD) to measure and obtain a clock phase detection result, and cooperates with a dynamic PID clock control algorithm to quickly adjust the local clock frequency, so as to realize the fast tracking and locking of the frequency and phase between the local clock and the clock source. The dynamic PID clock control algorithm of the invention dynamically adjusts the parameter P of the PID algorithm in real time according to the state, the clock frequency deviation and the clock phase difference, so that the algorithm has the advantages of stronger locking ability, shorter convergence time and faster response.

The invention discloses a multi-chip stacked packaging structure and a manufacturing method, and the manufacturing method comprises the steps: designing a welding spot which is downwards connected to a lower-layer chip and a welding spot which is upwards connected to an upper-layer chip on a metal frame according to the connection demands of a wafer, placing the wafer in a welding pad on the standardized metal frame, and carrying out the die bonding treatment, bonding the pin interconnection point of the wafer with the welding point through a connecting line to obtain an electric connection module; carrying out injection molding packaging on the electric connection module, then carrying out cutting processing to form a plurality of single chips, and carrying out test processing on the single chips; and stacking the plurality of qualified single chips on the circuit board in the vertical direction, and packaging the stacked structure in the single packaging cavity to obtain the multi-chip stacked packaging structure. According to the invention, through vertical stacking and single packaging cavity packaging, high integration level and miniaturized packaging are realized, the excellent thermal conductivity of the metal frame enables the heat dissipation performance of the chip to be improved, and the service life of the chip is prolonged.

The invention discloses a high-voltage cable outer metal sheath grounding defect on-line monitoring method and monitoring system, which can work under the condition that a cable is not powered off, realizes on-line monitoring, and realizes on-line monitoring through the cooperation of a current sensor, a voltage sensor, a single-chip microcomputer and an upper computer. And the equipment can quickly detect when a fault occurs and is convenient for maintenance workers to timely eliminate obstacles, so that the risk of major electric power accidents is reduced. The algorithm is similar to an improved neural network algorithm and is used for diagnosing the defects of the outer metal sheath of the cable, the weight is obtained through training learning, and finally the defects of the outer metal sheath of the high-voltage cable are determined. The protection content covers each component of the technical scheme, and comprises a monitoring method, a device structure, a sensor technology, a data processing algorithm, a neural network learning algorithm and the like.

The invention relates to the technical field of industrial quality inspection, and provides a chip defect detection method and equipment, which are used for improving the accuracy and efficiency of LED chip defect detection. According to the method, local wafer images are respectively collected from different visual angles under a plurality of light sources, multi-light-source images corresponding to a single visual angle are spliced, and then two-stage defect detection is carried out based on the multi-light-source spliced images. And the detail information of the LED chip of the local wafer image is richer than that of the complete wafer image, so that the accuracy of defect detection can be improved, meanwhile, in the first stage of two-stage absent detection, the coarse detection and positioning of a single chip are realized by classifying the multi-light-source spliced image, and the defect detection accuracy is improved. In the second stage, defect detection is carried out on part of single chip images based on rough detection and positioning results in the first stage, and compared with defect detection carried out on single chip images of all LED chips, the detection efficiency is effectively improved.

The present application relates to the field of solution measurement, in particular to an electrode conductivity sensor conductivity measurement circuit and method, first, the AC excitation generation module generates an amplitude and frequency adjustable AC sine excitation signal under the control of the single-chip microcomputer; then the AC sine excitation signal passes through the precision resistor R0 and the conductivity cell of the electrode sensor to the system ground in turn; then the differential amplification circuit differentially amplifies the voltage between the precision resistor R0 and the electrode sheet of the conductivity cell; the amplified voltage signal is collected by the ADC, and then the voltage data is transmitted to the single-chip microcomputer; finally, the single-chip microcomputer can obtain the conductivity of the solution after the collected voltage data is operated. The present application directly collects the peak and valley voltage values of the AC signal, subtracts to obtain the amplitude of the AC signal, and does not need a rectification filter circuit to detect the amplitude of the AC signal, which can quickly respond to the change of the solution conductivity, eliminates the influence of common-mode interference factors, and simplifies the circuit design.

The invention belongs to the technical field of equipment fault early warning, and particularly relates to an electric winch motor abnormity early warning system and early warning method. An electric winch motor abnormity early warning system comprises an on-site monitoring control module, a monitoring center and a management personnel terminal, the on-site monitoring control module comprises an equipment monitoring module, a control module, a single-chip microcomputer module and an Internet of Things module, the equipment monitoring module is electrically connected with the single-chip microcomputer module, the single-chip microcomputer module is electrically connected with the Internet of Things module, and the control module is electrically connected with the management personnel terminal. The Internet of Things module is in wireless connection with the monitoring center, and the monitoring center is used for analyzing monitoring data of the equipment monitoring module, sending a control signal to the control module and sending equipment maintenance information to the management personnel terminal. Parameters such as current, voltage and temperature of the motor during working of the winch are monitored in real time, the working state of the motor of the winch is analyzed by adopting a machine learning algorithm, early warning is performed on possible abnormal states, operation of the motor is controlled through the control module, and risk accidents are prevented.

The invention discloses a residual capacity balance control method and system for an aged lithium battery, and relates to the technical field of new energy materials and devices, and the method comprises the steps: inputting quantum magnetic field response data and infrasonic wave signals into a single-chip microcomputer, carrying out the wavelet noise reduction and histogram equalization processing based on an STM32 single-chip microcomputer, and generating an acoustic-magnetic coupling feature matrix; inputting a dynamic pheromone equalization model based on the acoustic-magnetic coupling characteristic matrix, calculating a capacity difference coupling coefficient between the battery packs through an ant colony optimization algorithm, and generating a capacity redistribution path topological graph; according to the capacity redistribution path topological graph, the energy transfer direction is controlled through a bidirectional Buck-Boost circuit, and an equalizing current threshold value is dynamically adjusted based on the quantum spin resonance magnetic field gradient; according to the invention, the quantum magnetic field response data of the aged lithium battery pack and the infrasonic wave signal generated by electrolyte decomposition are collected, so that the physical and chemical states in the battery are accurately monitored.

The invention relates to a continuous ink-jet printing head for high-speed spraying, and solves the problems that an existing ink-jet printing head is small in single-time ink outlet amount, unstable in ink outlet amount and not suitable for being applied to large-scale dyeing. The device comprises a substrate, at least one chip is arranged on the surface of the substrate, the single chip is of an integral structure, a plurality of spray holes are formed in the surface of the chip, at least one pressure cavity is formed in the back face of the chip, and the spray holes are communicated with the at least one pressure cavity; the substrate is of an integral structure, a flow channel is formed in the substrate, an ink inlet is formed in the back face or the side face of the substrate, the flow channel is communicated with the ink inlet, and the flow channel is communicated with the pressure cavity; the spraying holes are uniformly formed in the first direction, and the minimum interval is P; the diameter of the spray hole is D and meets D2 / Pgt; and 3.0 microns. Compared with a traditional printing and dyeing method, the method has the advantages that a large amount of water resources are saved, wastewater discharge is reduced, energy consumption is greatly reduced, and the method is energy-saving, environment-friendly, green and low-carbon.

The invention provides an automatic testing device for an electrical interface of hardware equipment, which comprises a core control unit, an AT32F415CBT7 single chip microcomputer, an RS232 serial port testing interface and an RS485 serial port testing interface, the test unit comprises eight paths of optical coupling isolation switching value input / output interfaces, a test module power supply input interface, a 24V power supply input interface of equipment to be tested, a state indication LED module and a vacancy detection module which are respectively used for host communication and equipment test, and a travel switch is adopted to detect the occupation state of the test unit, wherein the 24V power supply input interface of the equipment to be tested is powered by an ejector pin. According to the invention, the efficiency and accuracy of hardware equipment interface function testing can be improved, the labor cost is reduced, and batch detection requirements are met.

The invention relates to a method for monitoring jamming or synchronism of a main engine brake of a vertical elevator, and aims to monitor and diagnose the jamming or synchronism state of the elevator brake in real time through the combination of an acceleration sensor and an electromagnetic signal. The method comprises the steps that acceleration sensors are installed on the two brake component sides of the elevator brake, vibration acceleration signals of the two brake components are collected, or the response time difference between the action vibration acceleration signals and voltage signals of the brakes on the two sides is calculated through time sequence analysis through a vibration switch with an adjustable threshold value and by means of the single-chip microcomputer technology; and the action response time difference of different brake components is determined. If the time difference exceeds the preset threshold value, it is judged that the brake is jammed or has an asynchronous fault. And finally, according to a conjoint analysis result of the vibration acceleration signal and the voltage signal, accurate diagnosis and real-time early warning of brake jamming or synchronization faults are provided. According to the method, the detection precision and response speed of elevator brake jamming or asynchronous faults can be improved, and reliable guarantee is provided for safe operation of an elevator.

The invention discloses an automatic oil sampling device which comprises a sampling mechanism, a distance measuring mechanism and a lifting mechanism, the sampling mechanism comprises a sampling bottle, an upper end cover and a lower end cover, the upper end cover and the lower end cover are in threaded connection with the sampling bottle, a hanging ring is arranged at the top of the upper end cover, a pipeline and an electromagnetic valve are arranged on the lower end cover, and the pipeline is communicated with the sampling bottle; the distance measuring mechanism comprises an ultrasonic distance measuring sensor, an alarm and a single-chip microcomputer, the ultrasonic distance measuring sensor is arranged at the bottom of the lower end cover and electrically connected with the single-chip microcomputer, the lifting mechanism comprises a driving part, a support, a winding drum and a lifting rope, and the winding drum is arranged at the top of the support and connected with the support in a pivoted mode. The lifting rope and the cable are wound on the winding drum to descend or ascend along with rotation of the winding drum. The driving piece is in transmission connection with the winding drum. The automatic oil sampling device provided by the invention has the advantages that the sampling is accurate and quick, and the sample is not easy to pollute.

The invention belongs to the technical field of single-chip microcomputers, and particularly relates to a remote monitoring system based on a single-chip microcomputer and a control method thereof. The system comprises a single-chip microcomputer, a sensor acquisition unit, a wireless communication unit and an execution mechanism. When a single-chip microcomputer, a sensor acquisition unit and a system are initialized, a wireless communication unit and an execution mechanism are sequentially powered on, after the single-chip microcomputer completes hardware self-inspection, a handshake instruction is sent to the wireless communication unit, a secure channel with a remote control terminal is established, and after handshake is completed, the single-chip microcomputer writes in a unique identity identification code and enters a standby state; the single-chip microcomputer polls the sensor acquisition unit according to a preset sampling period to obtain an original data frame; the remote control terminal analyzes the error correction compressed data block, generates a control instruction according to a threshold strategy and returns the control instruction; the single-chip microcomputer receives the control instruction, then drives the execution mechanism to act, and records an execution state log. The method has the advantages of being high in communication efficiency, high in link fault-tolerant capability and fast in remote control response.

The embodiment of the invention provides a wafer-level chip segmentation method, and relates to the technical field of silicon optical wafer-level chips. The wafer level chip method comprises: providing a wafer (101); coating photoresist (103) on the pattern surface of the wafer (101), exposing a cutting channel (102) for chip separation by means of exposure and development, and protecting pattern layers of other areas by the photoresist (103); etching the cutting channel (102) to a set depth by using a dry method or a wet method, the set depth being smaller than the final chip thickness; and covering the back surface of the wafer (101) with an expandable film (105), and performing laser stealth dicing on the wafer (101) to obtain a plurality of single chips. And damage such as edge breakage and breakage is not prone to occurring during cutting, the formed side face is smooth in appearance, and finally the high yield is obtained.

The utility model discloses an anti-blocking gluing machine. The anti-blocking gluing machine comprises a gluing shell and an anti-blocking mechanism, a supporting frame is arranged in the middle of the upper side of the gluing shell, a glue storage box is arranged on the upper side of the supporting frame, a glue conveying pipe penetrates through the right wall of the glue storage box, the lower end of the glue conveying pipe penetrates through the right wall of the supporting frame, a glue supply pump is connected to the upper end of the glue conveying pipe in series, the lower side of the glue supply pump is fixedly connected with the upper side of the supporting frame, and evenly-distributed gluing nozzles penetrate through the lower end of the glue conveying pipe; the anti-blocking mechanism is arranged in the gluing nozzle; the anti-blocking gluing machine further comprises a single-chip microcomputer, the single-chip microcomputer is arranged on the right side of the gluing shell, the input end of the single-chip microcomputer is electrically connected with an external power source, according to the anti-blocking gluing machine, after gluing of the brake band gridding cloth is completed, glue below the gluing nozzle flows back into the glue nozzle through the elastic force of the spring and negative pressure, the glue in the glue nozzle is heated, and the glue in the glue nozzle is heated. The glue nozzle is effectively prevented from being solidified and blocked, and the use is convenient.

The utility model provides an intelligent alarm for fire-fighting detection, which relates to the field of fire-fighting alarm equipment and comprises a shell, a single-chip microcomputer and a communication module are mounted in an inner cavity of the shell, the single-chip microcomputer is used for receiving signals, the communication module is used for remote transmission, a detection module is mounted on the surface of the shell, and the detection module is connected with the shell. The detection module comprises a fire-fighting camera, a smoke detector and a temperature detector, and the detection module is used for ambient environment detection; according to the utility model, the single-chip microcomputer, the detection module and the alarm assembly are arranged, so that an effect of sending alarm information when a fire disaster occurs is achieved, the fire-fighting camera and the smoke detector can detect the surrounding environment, the fire disaster can be found in time, the alarm lamp and the loudspeaker can give an alarm in time when the detection module detects the fire disaster, and the safety of the fire disaster is improved. Through cooperation of the single-chip microcomputer, the communication module, the detection module and the alarm assembly, the use function of the fire alarm is effectively improved, and thus the use effect of the fire alarm is improved.

The invention provides a three-in-one dimming device for an LED driver and a dimming method of the three-in-one dimming device. The LED driver with a single dimming mode can be upgraded into the LED driver with multiple dimming modes of 0-10V analog signal dimming, DALI dimming and DMX dimming at low cost. The analog dimming circuit, the DMX transceiver circuit and the DALI transceiver circuit are all connected with the single-chip microcomputer. The dimming interface I is respectively connected with the analog dimming circuit, the interface protection circuit and the DALI transceiver circuit; the second dimming interface is connected with the analog dimming circuit, the interface protection circuit and the DALI transceiver circuit, and is connected with the grounding port through the on-off circuit. The on-off circuit is connected with the single-chip microcomputer. The interface protection circuit is also connected with the interface overvoltage detection circuit, the DMX transmit-receive circuit and the single-chip microcomputer. The interface overvoltage detection circuit is connected with the interface protection circuit, the first dimming interface and the second dimming interface.

The invention discloses a method and a device for acquiring an electrochemical impedance spectroscopy in a segmented manner, and solves the problems of large data volume, high sampling rate, long measurement time and the like in the traditional full-band EIS (Electrochemical Impedance Spectroscopy) test. A target frequency range of an electrochemical system is divided into a plurality of sub-frequency bands according to a preset rule, and an excitation waveform and a sampling parameter are set for each frequency band, so that segmented measurement is realized. For data collected by each sub-frequency band, the system calculates frequency domain characteristics of voltage and current response through methods such as fast Fourier transform (FFT) and the like, and obtains a complex impedance spectrum of the frequency band. And resampling, splicing and fitting all the sub-frequency-band impedance data to obtain a complete wide-frequency-band impedance spectrum. The system complexity and the calculation burden are small in the collection process, and the collection process can be achieved on a single-chip microcomputer.

The invention relates to the technical field of oil extraction machinery, and discloses a tower crane special belt online continuous detection device and method, the device comprises a belt, a single-chip microcomputer and a detector, the upper surface of the detector is fixedly connected with a support, the belt is internally provided with a supporting wheel, the detector is arranged above the supporting wheel, and the single-chip microcomputer is fixedly connected with the support. The outer side of the belt is provided with a group of corresponding belt track lines and head and tail end markers, a first infrared light-emitting tube and a first infrared receiving tube as well as a second infrared light-emitting tube and a second infrared receiving tube which are matched with each other are respectively arranged below the detector, and the first infrared light-emitting tube and the first infrared receiving tube are in a paired transceiving relationship; and corresponding points of the two detection light spots are respectively a belt track line and head and tail end markers on the belt. The double infrared sensor sets are used for monitoring the conditions of belt deviation and tensile deformation, belt damage or local damage fracture, abnormal stretching and the like, accidents such as belt fracture and the like are prevented, and the monitoring reliability is high.

The invention relates to the technical field of valve detection, in particular to a valve drift diameter rapid detection device which comprises a base, a valve is placed on the base, a pipe body is arranged on the base, the pipe body is inserted into a channel of the valve, a detection mechanism is arranged on the pipe body, and a positioning mechanism used for calibrating the position, located in the center of the channel, of the pipe body is arranged on the pipe body. The detection mechanism comprises a plurality of transmission sleeves arranged on the outer side of the pipe body, sliding discs are slidably connected into the transmission sleeves, springs are fixedly connected between the sliding discs and the inner walls of the transmission sleeves, ejector rods are fixedly connected to the sliding discs, the ejector rods extend out of the transmission sleeves and make contact with the inner walls of the channels, sliding grooves are formed in the transmission sleeves, and first connecting blocks are fixedly connected to the sliding discs. The end of the first connecting block extends out of the transmission sleeve and is provided with an induction block, and the transmission sleeve is provided with a displacement sensor corresponding to the induction block. Through the arrangement of the detection mechanism, radius size and flatness information of different positions can be synchronously collected, a channel overall contour analysis report is output after integration through a single-chip microcomputer, and rapid defect positioning is facilitated.

The invention relates to the technical field of photovoltaic power management, and discloses a photovoltaic charging management system of a field scientific observation station, which comprises a single chip microcomputer, a battery charging and discharging management module, a switching circuit and a sampling circuit, the battery charging and discharging management module manages charging and discharging of the battery and outputs the real-time state of the battery to the single-chip microcomputer. The sampling circuit samples the discharging condition of the photovoltaic panel output circuit or the battery and transmits sampling information to the single chip microcomputer; the single-chip microcomputer comprises a monitoring module and a switching module. The monitoring module judges whether the battery or the battery charging and discharging management module works abnormally according to sampling information. And the switching module carries out automatic charging management of photovoltaic charging or battery charging on the to-be-charged equipment. By intelligently switching the power supply mode, the service life of the battery is prolonged, the stability of power supply in a low-power-consumption mode is ensured, the power supply efficiency is improved, and remote real-time data monitoring and analysis are provided.

The invention relates to the technical field of lasers, in particular to a multi-chip vertical external cavity surface emitting laser which comprises a chip set, a first prism, a second prism and an output coupling mirror which are sequentially arranged along a preset central axis. The chipset comprises N gain chips, and the N gain chips output N sub light beams; the N sub-beams pass through the first prism, the sub-beams emitted from the first prism converge towards a preset central axis, the sub-beams are incident to the second prism before convergence and are combined into a resonant beam through the second prism, the resonant beam resonates in a resonant cavity formed by the output coupling mirror and the chip set, and the output coupling mirror and the chip set form a resonant cavity; the output laser is emitted from the output coupling mirror; wherein N is greater than 1. The invention is beneficial for solving the problems that the power of a single chip is limited, the beam combining efficiency is low, only incoherent beam combining can be realized, and a multi-chip beam combining structure is complex.

The invention discloses an intelligent fault prediction system for a solid state disk, relates to the technical field of solid state disks, solves the problems that only the test condition of a single chip can be identified, and the test effect of comprehensive radiation cannot be achieved, and is based on the number of threads corresponding to the solid state disk, and different processing processes are executed. The method comprises the following steps: processing the solid state disk in different combination states, confirming numerical value characteristics associated with different processing processes, analyzing reading speed fluctuation states of the solid state disk in different combination states according to the confirmed numerical value characteristics, carrying out multidirectional characteristic testing according to a specific analysis process, and identifying the use performance of the solid state disk. According to the multi-azimuth and multi-chip testing method, the multi-azimuth and multi-chip testing method and the multi-azimuth and multi-chip testing system, the characteristic data associated in the use performance is subjected to interval range confirmation, whether the fault hidden danger exists or not is confirmed according to the change amplitude of the corresponding interval range, the comprehensiveness in the fault hidden danger testing process can be effectively guaranteed by adopting the multi-azimuth and multi-chip testing mode, and a better testing processing effect is achieved.

The utility model relates to the technical field of soil in-situ detection, and discloses a portable soil quality multi-parameter in-situ detection device. The device mainly comprises a controller, a connecting wire, an optical probe and a sensor. The controller is provided with a touch screen, a single-chip microcomputer circuit board, a single-chip microcomputer, an SD card, a key switch, a wireless communication control panel and a power source, and power source management, detection system control, real-time data processing, man-machine interaction, data storage and remote transmission can be achieved. The sensor comprises a soil temperature probe, a soil humidity probe, a soil conductivity probe and a soil pH probe, and can realize real-time data acquisition of soil temperature and humidity, conductivity and pH value; an annular lamp holder, a light source, a photoelectric sensor, a plano-convex lens, a light shielding plate, a light shielding boss and a light shielding ring are arranged in the optical probe, and rapid collection of soil organic matter spectrum information can be achieved. The soil in-situ detection device realizes synchronous acquisition of multiple parameters of soil, is reasonable in structural design and convenient to operate, and is suitable for popularization and application in the field of soil in-situ detection.

The invention discloses a hysteresis compensation system and method for low-frequency compensation of a magnetoelectric vibration sensor. The compensation system comprises a difference to single-end circuit, a second-order lag compensation circuit, a single-chip microcomputer, an ADC conversion module, a first-order high-pass filtering module and a second-order low-pass filtering module which are sequentially connected with the magnetoelectric vibration sensor. The differential-to-single-end conversion circuit receives voltage signals output by the magnetoelectric vibration sensor and converts the voltage signals into single-end electric signals, the second-order lag compensation circuit receives the single-end electric signals of the differential-to-single-end conversion circuit for low-frequency compensation, the single-chip microcomputer receives low-frequency compensation signals, the ADC conversion module converts the low-frequency compensation electric signals into digital signals, and the digital signals are transmitted to the magnetoelectric vibration sensor. The first-order high-pass filtering module filters noise with the frequency lower than f1 out of the digital signals, and the second-order low-pass filtering module filters noise with the frequency higher than f2 out of the digital signals output by the first-order high-pass filtering module. According to the invention, the amplitude response of the magnetoelectric vibration sensor during low-frequency signal measurement can be improved.

The invention discloses a parallel constant-voltage digital audio power amplifier and a broadcasting system. Comprising a line input module, a line output module, a first analog-to-digital conversion circuit, a second analog-to-digital conversion circuit, a third analog-to-digital conversion circuit, a digital signal processor, a single-chip microcomputer, a digital-to-analog conversion circuit, an error comparator, a modulator, an integrating circuit, a pulse width modulation input half-bridge output stage, and a first carrier frequency selection and gain adjustment module. A second carrier frequency selection and gain adjustment module, a first LC filter, a high-frequency compensation network, a communication bus and a power switch. The technical problems that an existing multi-channel parallel digital constant-voltage power amplifier is only limited to power amplifier channels in the same power amplifier, the parallel connection mode only uses the first channel as a main power amplifier and only uses the other channels as slave power amplifiers, and certain limitation exists are solved.