50results about How to "High-precision acquisition" patented technology

A microscope system is constructed by a light guiding optical system 20 having an objective lens 21 and beam splitters 27a and 27b for splitting an optical image of a sample S, a photodetector 31 for acquiring an image of the sample S, and two CCD cameras 33 and 34 for focus control disposed on optical paths split by the beam splitters 27a and 27b. The cameras 33 and 34 are disposed being inclined with respect to the optical path so that the optical paths thereof in the light guiding optical system 20 vary along a z-axis direction in opposite directions to each other. Images acquired by these cameras 33 and 34 are analyzed in a focus controller 37, and the image pickup focal point to the sample S is controlled on the basis of the analysis result, whereby the focus control when an image of the sample is acquired can be suitably performed.

Provided is an optical image measuring apparatus forming a three-dimensional image based on tomographic images of an object, acquired at various depths even when the object moves during measurement. Including a half mirror (6) for dividing a light beam signal light (S) and reference light (R), a frequency shifter (8), a reference mirror (9) and a piezoelectric element (9A) used to change an optical path length of the reference light (R), CCDs (21, 22) for receiving interference light beams (L) resulting from interference light produced by superimposing the signal light (S) and the reference light (R) on each other by the half mirror (6) and outputting detection signals, an image forming portion for forming tomographic images based on the detection signals, a measurement depth calculating means (53), and an image processing portion (57). Forming a three-dimensional image or the like based on the arranged tomographic images.

A carrier signal generation section is provided for each of U, V, and W phases, and each of the carrier signal generation sections has an up-down counter for counting clock signals output from a clock generator. An initial value is set for each of the up-down counters. When the up-down counters are simultaneously started by method of a count start signal output from a CPU, the respective up-down counters start counting operations from the respective initial values, perform cumulative subtraction until the count value reaches an upper limit, and perform cumulative addition until the count value reaches a lower limit. As a result, triangular wave carrier signals Cu, Cv and Cw of respective phases having a predetermined phase difference can be readily generated with high accuracy.

Provided is an optical image measuring apparatus forming a three-dimensional image based on tomographic images of an object, acquired at various depths even when the object moves during measurement. Including a half mirror (6) for dividing a light beam signal light (S) and reference light (R), a frequency shifter (8), a reference mirror (9) and a piezoelectric element (9A) used to change an optical path length of the reference light (R), CCDs (21, 22) for receiving interference light beams (L) resulting from interference light produced by superimposing the signal light (S) and the reference light (R) on each other by the half mirror (6) and outputting detection signals, an image forming portion for forming tomographic images based on the detection signals, a measurement depth calculating means (53), and an image processing portion (57). Forming a three-dimensional image or the like based on the arranged tomographic images.

The invention provides a power system abnormality prediction method based on machine learning and big data analysis, and the method comprises the following steps: collecting original data of a relatedpower grid fault from a database, and segmenting of the original data according to a time sequence to acquire a data sequence; preprocessing the data sequence to obtain a corresponding characteristicvalue and an abnormal degree value, and forming sample data by the data sequence, the characteristic value and the abnormal degree value; performing secondary processing, sampling, conversion and feature design and selection on the sample data, and then performing data classification to obtain feature data corresponding to the sample data; constructing a machine learning model, and inputting thefeature data into the machine learning model for training to obtain a trained machine learning model; and accessing the trained machine learning model to a database line to obtain real-time power griddetection data, inputting the real-time power grid detection data into the trained machine learning model, and outputting to obtain a power system anomaly prediction result.

The invention discloses a high-precision multimode low-voltage load power property recording instrument, which is low in cost and flexible in installation, is not confined to various measuring interfaces, and can realize networked synchronous precise time service, high measurement precision and three-mode transmission, and the working method thereof. The high-precision multimode low-voltage load power property recording instrument comprises a microprocessor unit, wherein the microprocessor unit acquires a power grid simulating signal from a low voltage side power grid through a signal regulation and analog-digital conversion processing unit, computes and analyses the voltage, the current, the frequency, the active power, the passive power and the power factor of a power grid low voltage side phasor signal, acquires a GPS (global positioning system) or a Beidou navigation signal through a double-mode time service unit to obtain time information, integrates the time information with the voltage, the current, the frequency, the active power, the passive power and the power factor which are computed out to obtain a time sequence power grid vector, and sends data to a server terminal through a three-mode data sending unit; and the microprocessor unit also acquires a power voltage from the low voltage side power grid through a power unit and is connected with a liquid crystal display unit and a control unit.

The invention discloses a multichannel high-speed data acquisition system of the internet of things. The multichannel high-speed data acquisition system comprises wireless sensor network data acquisition node equipment 1, a multichannel high-speed data acquisition and control system 2 and a power supply system 3. The wireless sensor network data acquisition node equipment 1 comprises a data acquisition node which is placed on a point to be detected. The multichannel high speed data acquisition and control system 2 is connected into the wireless sensor network data acquisition node equipment through a serial port, a remote monitoring center sends data command frames to the wireless sensor network data acquisition node equipment 1 in a wireless mode, and then the data command frames are sent to the multichannel high-speed data acquisition and control system 2 through the series port to carry out corresponding commands. The multichannel high-speed data acquisition system of the internet of things can be used for sampling and remote monitoring of the physical quantities (such as temperature, humidity, pressure, rotating speed, displacement and dust) of sensors with various interference types, and can collect and process data information at a high speed.

In order to acquire a tomographic image of the eye to be inspected with high precision even in case where an optical path length and intensity vary depending on a scanned position in an OCT apparatus acquiring the tomographic image of a predetermined part of an object to be inspected, based on the intensity of interference light obtained by combining return light from the object that has been irradiated with the measuring light, with reference light corresponding to the measuring light, includes: a scanning optical system which scans the object with the measuring light in an optical path of the measuring light; an image forming unit which generates the tomographic image based on the intensity of the interference light; and an image correcting unit which subjects the tomographic image to a correction process appropriate to the scanned position with the measuring light on the object.

The invention discloses a method and a device for testing and evaluating tolerance of a drive motor system of a frequency converter under power supply disturbance. The method comprises steps as follows: 1, an instantaneous voltage disturbance resisting test; 2, a long-time voltage fluctuation test; 3, a harmonic disturbance test. The device comprises a power supply grid, a switch Q1, a switch Q2,a switch Q3, a power supply disturbance generator, a tested frequency converter, a tested electric motor, a pulled power generator, a filter device, a voltage compensator, a storage battery, a measurement control unit, a base, a rotating shaft, a UPS (uninterrupted power supply) and a grid-connected frequency converter. The device has the advantages that the device has accurate voltage regulationand frequency modulation and high fault simulation capability and can realize the functions of energy feedback, coordination control of rotating speeds and torque, high-speed and high-accuracy acquisition of the electric quantity and the mechanical quantity, measurement of temperature rising of a motor winding, control of software and machine starting and stopping, torque control, real-time display, wave recording, switch control as well as data analysis and computation.

The invention discloses a smart accumulator and a remote management system thereof. The smart accumulator comprises multiple accumulator monomers; any accumulator monomer comprises a battery upper cover; a selector switch and a communication interface are arranged on the battery upper cover; multiple accumulator monomers are in cascade connection through the communication interface so as to form an accumulator pack; the interior of any accumulator monomer contains an integrated chip, and the integrated chip is used for online monitoring the voltage, the internal resistance and the temperatureof the accumulator monomer in real time; the integrated chip comprises an A / D chip, a CPU processor, a voltage measurement circuit, an internal resistance measurement circuit, and a temperature measurement circuit; the A / D chip is connected with the CPU processor; and the CPU processor is connected with the communication interface. The smart accumulator disclosed by the invention can reflect the own operation working condition of the accumulator in real time so as to perform the voltage balance; and meanwhile, a fully functional accumulator professional information processing and comprehensiveanalysis internet information platform is provided so as to effectively improve an operation status of the accumulator, obviously improve the power supply reliability of the accumulator, and prolongthe life of the accumulator.

For evaluation of a measured parameter with a measuring cell having a cavity which generates for light an optical path length difference changing corresponding to the variation of the measured parameter, the method includes: introducing light from a white light source with the aid of an optical waveguide via a coupler (3) disposed in the path of the optical waveguide into the cavity, coupling out at least a portion of the light reflected back into the optical waveguide from the cavity with the aid of the coupler and conducting this reflected light to an optical spectrometer, determining the optical spectrum of the reflected light in the spectrometer and generating a spectrometer signal, conducting the spectrometer signal to a computing unit, wherein the spectrometer signal is directly converted through the computing unit to an interferogram and from its intensity progression the location of the particular extremal amplitude value is determined and this particular location represents directly the particular value of the optical path length difference in the cavity, which comprises the measured parameter.

The invention discloses a closed loop dual-mode reduced-order model prediction control method for a Buck type DC-DC converter. A closed loop dual-mode reduced-order model prediction control algorithm is adopted; a closed loop feedback gain coefficient is introduced in a rolling optimization process so as to ensure the stability of the control system; meanwhile, the dual-mode structure is subjected to order reduction by adopting an SVD decomposition method, so that the overall calculation process is simplified twice in order to reduce the online calculated amount; and in addition, an off-set free idea is adopted in the algorithm implementation process, so that the output can stratify a set point value, and the control for the DC-DC converter is realized.

A carrier signal generation section is provided for each of U, V, and W phases, and each of the carrier signal generation sections has an up-down counter for counting clock signals output from a clock generator. An initial value is set for each of the up-down counters. When the up-down counters are simultaneously started by method of a count start signal output from a CPU, the respective up-down counters start counting operations from the respective initial values, perform cumulative subtraction until the count value reaches an upper limit, and perform cumulative addition until the count value reaches a lower limit. As a result, triangular wave carrier signals Cu, Cv and Cw of respective phases having a predetermined phase difference can be readily generated with high accuracy.

The invention provides a seismic prospecting method and device and relates to the field of geophysical prospecting and solves a problem that the prior Patch observation system work methods are in capable of meeting demands. The method includes the following steps: arranging shot points alternatively at shot interval parts between odd-number shot lines and even-number shot lines on a shot-line direction of a Patch observation system and / or arranging alternatively demodulator probes at interval parts between odd-number demodulator probe lines and even-number demodulator probe lines on a seisline direction of the Patch observation system; and according to the arranged shot points and demodulator probes, acquiring seismic data. The technical scheme is applicable of marine seismic exploration and realizes seismic data acquisition of higher precision.

The invention discloses a field programmable gate array (FPGA)-based industrial field temperature acquisition and alarm method. The method includes the following steps that: step 1, a host controls a field temperature acquisition module to perform filed temperature acquisition; step 2, the temperature acquisition module transmits acquired temperature data to the data processing and transmitting module of the host through a single bus; step 3, the data processing and transmitting module processes the temperature data and packs processed temperature data into a standard Ethernet packet, and the standard Ethernet packet is transmitted out through an Ethernet control module; and step 4, the data processing and receiving module of a client receives the Ethernet packet, processes and displays the temperature data and provides the temperature data for a display and temperature alarm module; and step 5, the display and temperature alarm module displays the temperature data and judges whether temperature exceeds preset temperature according to the temperature data, and emits alarm signals when the temperature exceeds the preset temperature.

The invention discloses a distributed photovoltaic data acquisition terminal, a distributed photovoltaic data acquisition system and a data processing method. The distributed photovoltaic data acquisition terminal comprises a photovoltaic environment parameter monitoring unit, a distributed photovoltaic data access terminal and at least one photovoltaic electrical parameter wireless data acquisition unit which are arranged in an area where a solar cell panel is located. The photovoltaic electrical parameter wireless data acquisition unit can acquire the voltages and currents outputted by the solar cell panel and an inverter, the photovoltaic environment parameter monitoring unit comprises a small solar cell panel and can collect the irradiance, environment temperature, environment humidityand backboard temperature, and the photovoltaic electrical parameter wireless data acquisition unit and the photovoltaic environment parameter monitoring unit transmit the data to the distributed photovoltaic data access terminal in a unified manner. According to the invention, all access and the real-time operation monitoring of the distributed photovoltaic data are realized.

A battery fuel gauge circuit is coupled to a rechargeable battery. A first A / D converter samples a voltage VBAT of the battery. A logic circuit receives the output of the first A / D converter. The logic circuit acquires the output of the first A / D converter when an electronic device mounting the battery fuel gauge circuit is turned on for the first time.

A wobble signal demodulation circuit carries out phase demodulation of a wobble signal acquired from a reflection light reflected from a recording surface of an optical disk, the recording surface carrying a meandering track thereon, wherein the wobble signal including a carrier wave part having a predetermined fundamental frequency and a phase modulation wave part added with predetermined information. The wobble signal demodulation circuit includes a bandpass filter having a central frequency in the vicinity of the fundamental frequency, the bandpass filter extracting a signal of the carrier wave part from said wobble signal; a frequency adjustment circuit that adjusts the central frequency of the bandpass filter based on a frequency adjustment signal corresponding to a linear velocity of the optical disk under rotation; a signal generation circuit that produces a clock signal from the extracted signal of the carrier wave part; and a modulation-wave demodulation circuit that carries out phase demodulation for the phase demodulation part of the wobble signal in synchronization with the clock signal.

The invention discloses a precise load current generator of a lithium battery. The generator comprises a lithium battery unit of current-constant charging and discharging, a data collection unit, a control execution unit, a microprocessor control unit and a PC data collection and analysis unit, wherein the lithium battery unit is connected with the data collection unit, the data collection unit is connected with the microprocessor control unit, the microprocessor control unit is connected with the lithium battery unit and the data collection unit via the control execution unit, and the microprocessor control unit is connected with the PC data collection and analysis unit via a communication interface. The controlled load current collection unit uses a single-chip microcomputer to convert a given current signal into a given voltage signals and further to realize controllable adjustment of the load current, the load current is collected by collecting the resistance voltage drop of a diverter, and the load current can be collected highly precisely via a load resistor. The discharging and charging current of the lithium battery can be tested precisely and controlled in a programmable manner.

A colorimetry method includes: acquiring spectroscopic measurement results for a colorimetry range in an image; and acquiring colorimetry results for a first color based on the spectroscopic measurement results for the first color from a plurality of colors in a case where the plurality of colors is included in the colorimetry range.

The invention discloses an exhibition positioning analysis system and method based on a UWB technology. The system comprises audience UWB chest cards, booth UWB tags, exhibit UWB tags, a base station,an application server, a database server, an audience exhibition APP and exhibition organizer exhibition management software. The audience UWB labels are arranged in the audience UWB chest cards; thebase station is deployed in an exhibition, the base station receives pulse signals sent by audience UWB tags, booth UWB tags or exhibit UWB tags; the database server collects audience coordinate positions sent by the base station; and the application server communicates with the database server, the audience exhibition APP and the exhibition organizer exhibition management software. According tothe invention, the track data of the audience can be effectively acquired with high precision, the data of the audience can be intelligently analyzed, corresponding services can be provided, the real-time distribution diagram of the audience / customer can be checked, and the interest of the audience / customer in what type of exhibit can be known.

Disclosed is an acoustic sensor including a semiconductor chip comprising two or more transistors. At least two of the transistors are each connected to a piezoelectric thin film, and the piezoelectric thin film is directly or indirectly disposed over a semiconductor substrate such that a conduction state of each of the at least two transistors varies in response to a pressure of sound waves incident on the piezoelectric thin film, and the two or more transistors are connected to constitute a single amplifier circuit so as to add up and amplify a signal with a strength in response to the conduction state of each of the at least two transistors, and output the amplified signals.

A screen stretcher device is provided and has a tensioning mechanism, a first fixture and a second fixture. The first fixture is securely disposed at one end of a metal mask plate, and the second fixture is securely disposed at the other end of the metal mask plate. A horizontal plate is disposed above the metal mask plate. A measuring mechanism is configured to acquire location information of a pattern on the metal mask plate. A magnetic mechanism is disposed above the horizontal plate, and is configured to attract the metal mask plate such that the metal mask plate is deformed.

There is provided an illuminance acquiring device which acquires light energy corresponding to an output value of an image pickup device every different exposure time by using a correspondence relation between the output value of the image pickup device for converting intensity of sensed light into electric energy and outputting the electric energy and the light energy obtained by multiplying the intensity of light sensed by the image pickup device with the exposure time, calculates the intensity of light sensed by the image pickup device from the light energy acquired every different exposure time and the correspondence relation, and acquires the calculated intensity of light sensed by the image pickup device, the illuminance acquiring device including a noise-model data calculating section calculating noise-model data for modeling an influence of a noise generated in the image pickup device on the output value of the image pickup device by using image pickup data obtained by means of the image pickup of the image pickup device at different exposure time; and an illuminance calculating section calculating the output value of the image pickup device nil consideration of the influence of the noise from the noise-model data and the output value of the image pickup device when the image pickup device picks up a predetermined image; acquiring the light energy from the correspondence relation by using the calculated output value of the image pickup device in consideration of the influence of the noise; and calculating the intensity of the sensed light when the image pickup device picks up the predetermined image from the acquired light energy and the exposure time when the image pickup device picks up the predetermined image.

The invention discloses an orchard traction type double-fertilizer-box variable fertilizer applicator and a fertilization method. The variable fertilizer applicator comprises a traction machine, a GNSS / INS combined positioning device, a vehicle-mounted computer, two hydraulic ditching mechanisms, double fertilizer boxes, two hydraulic auger mechanisms, two hydraulic fertilizer discharging mechanisms, two soil covering devices, a transfer gear box and a hydraulic power system, wherein the GNSS / INS combined positioning device is adopted, when GNSS positioning signals are poor, automatic switching to INS positioning is carried out, the phenomenon that the GNSS positioning signals are poor or signal losing are caused due to fruit tree canopy closing is avoided, and accurate navigation of a unit is guaranteed; and a hydraulic power system is controlled by the vehicle-mounted computer, so that closed-loop control over the hydraulic ditching mechanisms, the hydraulic auger mechanisms and thehydraulic fertilizer discharging mechanisms can be respectively realized, integrated operation of forming two ditches, variable application of two kinds of granular fertilizers and soil covering can be completed, and the operation efficiency is high.

The invention discloses a circuit layout structure of a wireless data transmitting-receiving sensor used for measuring clamping force of a chuck. The circuit layout structure is composed of a wireless data receiving part and a wireless data transmitting part. When the clamping force of the chuck is stressed to change, a resistance strain diaphragm deforms, and voltage on a corresponding resistor is made to change; since the change is small, a strain electrical bridge is adopted, a signal is amplified through an amplifying circuit, and then the signal is transmitted to a post-processing circuit, an A / D converter and a controller; and finally a wireless transmitting module transmits the signal to a wireless receiving module through a wireless communication antenna. The wireless receiving module transmits received data to an upper computer for data analyzing and processing through a USB communication protocol. Compared with the prior art, the circuit layout structure of the wireless data transmitting-receiving sensor used for measuring the clamping force of the chuck achieves high-precision acquisition of clamping force data based on the integrated circuit design technology, and has the advantages of being small in size and precise in data transmitting and receiving.

The invention discloses a nonlinear micro-current acquisition device and method suitable for Langmuir probes. The nonlinear micro-current acquisition device comprises a plurality of parallel Langmuir probes, wherein the first end of each Langmuir probe is arranged in the plasma of an ionized layer, the second end of each Langmuir probe is connected with a nonlinear acquisition amplification circuit, the nonlinear acquisition amplification circuit is also connected with the output end of a scanning voltage loading circuit, the input end of the scanning voltage loading circuit is also connected with a micro-control unit, the nonlinear acquisition amplification circuit is also connected with the input end of a low-pass filter circuit, the output end of the low-pass filter circuit is connected with the micro-control unit MCU, and the MCU is connected with a satellite center machine communication interface.

The invention belongs to the technical field of data acquisition, and particularly relates to a data acquisition system based on a Bluetooth 4.0 technology. The data acquisition system comprises a microprocessor, a Bluetooth transmission module, a temperature and humidity sensor, a current sensor, a voltage sensor, a power supply module and a Bluetooth client terminal, wherein the microprocessor,the Bluetooth transmission module, the temperature and humidity sensor, the current sensor and the voltage sensor are connected with the power supply module; the temperature and humidity sensor, the current sensor and the voltage sensor are all connected with the microprocessor; the microprocessor is connected with the Bluetooth transmission module; and the Bluetooth transmission module is connected with the Bluetooth client terminal. The system not only can acquire temperature, humidity and current data in real time, and also has the advantages of being high in response speed, high in acquisition precision and small in size, so that use convenience is brought to people, the control of a factory on a production environment of products is facilitated, the product quality is improved, and great convenience is brought to people.