39 results about "Waveform observation" patented technology

The invention provides a waveform display device and method. The waveform display device comprises a data acquisition module, a real time data compression module, a trend chart data compression module, a trend waveform display module, a real time compression data buffer unit, a trend chart data buffer unit, a first counter, a second counter, a dynamic compression ratio calculation module and a trend waveform display area. The purpose of displaying an acquisition data trend waveform is achieved by the real time compression data buffer unit and the trend chart data buffer unit with fixed-size storage spaces, and the data storage space is saved; a historical data positioning function is provided to facilitate a user to observe historical acquisition data in detail; a real time waveform display area and the trend waveform display area are longitudinally arranged, accordingly, the visual confusion phenomenon caused by the connection between the trend waveform and the real time waveform when the data acquisition speed is quicker or the data acquisition just starts is avoided, and the better trend waveform and real time waveform observation effects are provided for the user.

A trigger signal generating apparatus includes a frame synchronous circuit which receives a frame signal having a predetermined bit rate and outputs a synchronous signal in synchronism with an input timing of leading data of the frame signal, a position information output circuit which receives the synchronous signal output by the frame synchronous circuit and outputs the position information indicating an input bit position of the frame signal, a position designator which designates an arbitrary bit position of the frame signal, and a trigger signal generating circuit which outputs a trigger signal at a timing when the position information output by the position information output circuit is coincident with the arbitrary bit position designated by the position designator. A trigger is generated accurately at an arbitrary bit position of the frame position.

The invention discloses a precision adjusting method based on digital compensation and a digital oscilloscope. The method comprises the steps of obtaining digital waveform data of a signal; performingrandom number compensation on a numerical value of each data point in the digital waveform data to obtain a plurality of compensation values corresponding to the numerical values of the data points;performing digital gain configuration on each compensation value to obtain a plurality of one-to-one corresponding configuration values; cutting out each configuration value, and obtaining first values with the isotopic number as the numerical values of the data points; according to the first values, displaying the signal waveforms. Due to the fact that the obtained first values show the distribution with continuous values and the small identical numerical value ratio, no middle numerical value is lost, when the first values are used for performing waveform displaying, the waveforms can show the smooth display effect with no broken line, and the signal waveform observation experience of technicists can be improved.

Frequencies of plural peak signals which appear in a band ½ of a sampling frequency are detected from a spectrum obtained from a measuring target signal sampled with the sampling frequency in order to detect the repetition frequency of the measuring target signal having plural harmonic components with a similar power. Each of the plural peak signals is successively assumed to be a fundamental wave beat component originating from the fundamental wave of the measuring target signal and theoretical frequencies of harmonic beat components originating from harmonic components of the measuring target signal are successively calculated. The theoretical frequencies are compared with the frequencies of the plural peak signals to determine one of the plural peak signals as a fundamental wave beat component originating from the fundamental wave of the measuring target signal.

In a method of detecting a repetition frequency of a measured signal, in order to detect the waveform repetition frequency of the measured signal with high accuracy even in the presence of a frequency fluctuation in the measured signal, the repetition frequency of the measured signal acquired by the conventional method is used as a provisional repetition frequency, and the frequency change amount of the specified signal obtained in the case where the measured signal is sampled sequentially with a sampling frequency greatly changed from the provisional sampling frequency to generate a frequency fold at the time of sampling is detected. Based on the detected frequency change amount of the specified signal and the change amount of the sample number indicating how many times the frequency fold has occurred in the process, the error contained in the sampling number with a frequency fluctuation contained in the measured signal is calculated. Then, based on the error contained in this sample number, the provisional repetition frequency of the measured signal is corrected, thereby calculating the regular repetition frequency of the measured signal.

A waveform input circuit, waveform observation unit and semiconductor test apparatus allow to faithfully observe waveform of a device under test with high output impedance and low load driving capability. A waveform input circuit includes a high input impedance terminating resistance which receives an input signal from a transmission line, a relay which selects a terminating resistance, an input buffer which is connected when the high input impedance terminating resistance is selected. A reference potential switch is further provided to select a reference potential of the transmission line where one reference potential is controlled to be in phase with the input signal by an input buffer which is connected when the high input impedance terminating resistance is selected.

The invention discloses a hardware coprocessing device for a high-speed mass data acquisition system. During detailed waveform observation, one path of data flow (1) shunted from high-speed mass data flow with increased bit width and reduced speed by a time-base circuit enters a hardware coprocessing multi-stage screening unit; N continuous numerical values of the data flow (1) are screened; the screened coprocessing data is sent into hardware coprocessing FIFO (First In First Out) to be stored; the other path of the flow data (1) flows to the data FIFO of a DDR2 (Double Data Rate 2) controller and is stored in a DDR2 high-capacity dynamic memory under the control of the DDR2 controller; a user performs profile observation according to the coprocessing data in the hardware coprocessing FIFO; and the start address and the destination address of waveform needing detailed observation are sent to an addressing counter, and addressing is performed on the high-capacity dynamic memory, and the observation waveform data the user concerns is read quickly and sent to a display screen for displaying. According to the invention, through the increasing of the bit width of a high-speed mass data flow, the speed of the high-speed mass data flow can be reduced.

The invention discloses a system for processing animal gastrointestinal mobility signals. The system comprises a data collection unit and a data processing unit. The data processing unit comprises a preprocessing unit, a baseline drift removing unit, an abnormal data identifying and removing unit, a contraction cycle positioning unit and a gastrointestinal dynamic calculating unit. The invention further discloses a method for processing the animal gastrointestinal mobility signals. The method includes the steps of data collection, preprocessing, baseline drift removal, abnormal data identification and removal, contraction cycle positioning and gastrointestinal dynamic calculation. By the system and the method, existing low efficiency and inaccuracy in manual waveform observation and manual calculation of gastrointestinal dynamics indexes such as wave number, amplitude and dynamic index are changed, and calculation speed of each gastrointestinal mobility performance index can be greatly improved.

The invention discloses an intelligent pulse waveform record analysis method and a system. According to the method, a pulse current signal and a pulse voltage signal are converted into a pre-determined voltage signal, the pre-determined voltage signal is acquired by a single-chip microcomputer acquisition module having an AD acquisition function, and the pre-determined voltage signal is timely sent to a PC for analysis processing. The method is advantaged in that intelligent representation, analysis and data storage of pulse waveforms can be realized, properties of high automation degree, detailed waveform representation and small storage data volume are realized, and timely waveform observation is convenient.

The invention provides a waveform display method and display device. The method includes: segmenting a screen into at least one display area, and outputting and displaying display data of at most one waveform to each display area; when a waveform shift indication information is received, executing the following processing processes: a pre-shift waveform, an original display area and a pre-shift-in display area are determined according to waveform shift indicating information; display data of the pre-shift waveform are stopped from being output to the original display area; when the pre-shift-in display area is determined not to display a waveform at present, the display data of the pre-shift waveform is directly output to the pre-shift-in display area for display; when the pre-shift-in display area is determined to display an occupied waveform, display data of the occupied waveform are output to another display area outside the pre-shift-in display area, and the display data of the pre-shift waveform are output to the pre-shift-in display area for display. The waveform display method provides a relatively direct observation effect for a user, and omits the trouble of frequent shift operation for waveform observation.

The present invention discloses a method for analyzing a state of a power supply network of an integrated circuit in real time. The method comprises: 1, according to power supply routing of an integrated circuit layout, extracting a resistance-capacitance network and forming a power supply network model in a spice format; 2, setting up a power supply unit by utilizing a power supply module in the integrated circuit, and forming a power supply model in a spice format; 3, based on integral circuit simulation, extracting a dynamic power consumption state of each module in the integrated circuit to form a power consumption model; 4, based on the power supply network model and the power supply model, setting up a top layer simulated circuit, wherein the power supply model is connected to a power supply node, and the power consumption model is connected to a power consumption node; and 5, carrying out simulation on the top layer simulated circuit by utilizing a spice tool, and carrying out waveform observation on different nodes to know the state of the power supply network in real time. According to the method disclosed by the present invention, a pressure drop of each node of the power supply network can be accurately analyzed, so that advantages and disadvantages of power supply signal routing can be analyzed, or the pressure drop of each node is used as judgment basis of regulating the number and positions of power supply units.

The invention discloses a system for processing animal gastrointestinal mobility signals. The system comprises a data collection unit and a data processing unit. The data processing unit comprises a preprocessing unit, a baseline drift removing unit, an abnormal data identifying and removing unit, a contraction cycle positioning unit and a gastrointestinal dynamic calculating unit. The invention further discloses a method for processing the animal gastrointestinal mobility signals. The method includes the steps of data collection, preprocessing, baseline drift removal, abnormal data identification and removal, contraction cycle positioning and gastrointestinal dynamic calculation. By the system and the method, existing low efficiency and inaccuracy in manual waveform observation and manual calculation of gastrointestinal dynamics indexes such as wave number, amplitude and dynamic index are changed, and calculation speed of each gastrointestinal mobility performance index can be greatly improved.

The invention provides a multi-channel signal multiplexing device, which includes a multi-channel active probe, a multi-channel signal conditioning circuit and a signal selection circuit; the multi-channel active probe sends the measured multi-channel signals to the In the multi-channel signal conditioning circuit, the multi-channel signal after conditioning is divided into two groups, one group is output to the digital signal acquisition channel, and one group is output to the signal selection circuit; the signal selection circuit selects the input multi-channel signal, and the One or more signals are sent to the analog signal acquisition channel. The invention makes it possible to conveniently and synchronously observe the logic sequence and waveform of a plurality of digital signals without moving the connection position of the probe during the test, the synchronization of the signal observation can be better guaranteed, and the test speed is improved.

The invention discloses a digital oscilloscope capable of displaying an arithmetical operation result. The digital oscilloscope comprises a channel vertical gear selection knob, a measuring channel, an input unit, an arithmetical operation vertical gear selection knob and a display unit, wherein the channel vertical gear selection knob is used for generating vertical gear information of a measured channel; the measuring channel is used for acquiring a measured waveform according to the vertical gear information; the input unit is used for inputting an arithmetical operation formula; the arithmetical operation vertical gear selection knob is used for generating vertical gear control information of the operated waveform; and the display unit is used for setting a vertical gear of a display window and displaying the measured waveform and the operated waveform corresponding to the operation formula in the display window according to the vertical gear control information of the operated waveform, and setting a maximum vertical gear and a minimum vertical gear of the display window according to the vertical gear information of the measured channel and the arithmetical operation formula. According to the oscilloscope, a gear scope of a high level arithmetic function is determined automatically according to the operation formula; compared with the prior art, a large number of useless gears are removed, and the automatically determined gear scope more facilitates waveform observation of a user.

The invention discloses an FPGA (Field Programmable Gate Array)-based STDP (Spike Timing-dependent Plasticity) synaptic plasticity experimental platform under feedforward neural network. The experimental platform comprises an FPGA development board and an upper computer which are connected with each other, wherein the FPGA is taken as a lower computer and is provided with a human-machine operation interface programmed by C++ to perform synaptic strength connection change waveform and dynamical characteristic observation and parameter setting; the FPGA is used for implementing a mathematic model, and applying an external stimulate signal to a multilayer feedforward neural network and a synaptic connection model; the upper computer is applied to dynamics analysis such as parameter adjustment, synaptic change waveform observation, synaptic adaptive change and the like. The FPGA-based STDP synaptic plasticity experimental platform has the effects that on the basis of a high-speed operation FPGA neural synaptic plasticity computation platform, hardware modeling relative to a synaptic plasticity part among phenotype nerve cells is realized through a non-animal experiment of biological neural synaptic connection, the learning process can be stabilized effectively, and the consistence with real neuronal synapse plastic connection is achieved.

PROBLEMUnauthorized reproduction by a third party is to be prohibited by preventing waveform monitoring on a circuit board and by providing security from the viewpoint of hardware.SOLUTIONThe present invention disables waveform observation by providing a capacitance detection circuit 3 between devices (i.e., between a programmable device 1 and a nonvolatile device 2) so as to detect input capacitance of the waveform observation apparatus and to halt data signals themselves between the devices (i.e., between the programmable device 1 and nonvolatile device 2).

The invention relates to a visual detection method for the assembling defects in a metal oxide arrester for electric power. In the visual detection method provided by the invention, a means that the electric measurement and the waveform observation are taken to be principal and the X-ray perspective radiation is taken to be auxiliary is adopted to realize the rapid diagnosis of the assembling defects in the metal oxide arrester for the electric power; the two ends of a discharge counter which is provided with an electric arrester are used for monitoring the voltage waveform through a common oscilloscope, and if the voltage waveform contains high-frequency and high-amplitude noise waves, the metallic suspended particle defect exists in the arrester; and by virtue of an X-ray perspective radiation means, the main point is that the visual expression of the structure feature in the arrester can be realized near the bottom of a single-section arrester, thereby directly determining that thedefect exists in the arrester. The visual detection method provided by the invention mainly integrates an electric detection means and an X-ray perspective radiation technique to realize the rapid positioning and determination of the assembling defects in the metal oxide arrester for the electric power, and has the obvious advantages of concise structure, high efficiency, defect shape visualization and the like.