KR20100123052A - Apparatus for integrating measurement using an usb interface - Google Patents
Apparatus for integrating measurement using an usb interface Download PDFInfo
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- KR20100123052A KR20100123052A KR1020090042058A KR20090042058A KR20100123052A KR 20100123052 A KR20100123052 A KR 20100123052A KR 1020090042058 A KR1020090042058 A KR 1020090042058A KR 20090042058 A KR20090042058 A KR 20090042058A KR 20100123052 A KR20100123052 A KR 20100123052A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
- G01R13/02—Arrangements for displaying electric variables or waveforms for displaying measured electric variables in digital form
- G01R13/0218—Circuits therefor
- G01R13/0236—Circuits therefor for presentation of more than one variable
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
- G01R13/20—Cathode-ray oscilloscopes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/12—Circuits for multi-testers, i.e. multimeters, e.g. for measuring voltage, current, or impedance at will
- G01R15/125—Circuits for multi-testers, i.e. multimeters, e.g. for measuring voltage, current, or impedance at will for digital multimeters
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2212/00—Indexing scheme relating to accessing, addressing or allocation within memory systems or architectures
- G06F2212/21—Employing a record carrier using a specific recording technology
- G06F2212/214—Solid state disk
- G06F2212/2146—Solid state disk being detachable, e.g.. USB memory
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
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- General Physics & Mathematics (AREA)
- Tests Of Electronic Circuits (AREA)
Abstract
Description
The present invention relates to an integrated measuring device using a universal serial bus (hereinafter referred to as USB) interface.
In general, digital oscilloscopes and logic analyzers are general-purpose instrumentation for the development and maintenance of digital equipment.
As such, digital oscilloscopes and logic analyzers are frequently used equipment, but they are difficult to carry around due to their inconvenientness in carrying out tests and debugging in industrial fields.In addition, digital oscilloscopes and logic analyzers with various functions are expensive because of the high equipment cost. In the field or small and medium sized industrial sites, the price burden is a big problem.
In addition, such stand-alone equipment is less easy to move due to its size and weight, it is almost always for a single purpose measurement, and except for the latest expensive equipment, it is difficult to use the current network environment that is common. Since it is almost impossible, the utilization of the equipment was practically low despite the expensive equipment.
Therefore, in order to compensate for the portability and high price of these stand-alone equipments, it is not only integrated with various measurement equipments, but also connected to a notebook computer or a desktop computer to display measurement results and processing of measurement data on a computer. It only collects data, it is small and easy to carry and its price is lower than that of single equipment, so it can be developed and debugged without purchasing expensive single equipment. There is a need for the development of an integrated instrument that can also have an alternative effect of imported instruments.
SUMMARY OF THE INVENTION An object of the present invention is to provide an integrated measurement device using a USB interface that is miniaturized for easy portability by implementing a digital oscilloscope function of a 200 MHz band and a sampling 16-channel logic analyzer function so as to solve the above problems. .
Another object of the present invention is to connect an integrated instrument with a digital oscilloscope and logic analyzer function to a PC using a USB interface, and transfer data measured from an instrument to be measured to a PC via a USB interface to the data on the PC. An integrated measuring device using a USB interface for performing processing and display of measurement results is provided.
Still another object of the present invention is to design a low power device to be driven by a PC power source connected via a USB interface, an integrated instrument with a digital oscilloscope and logic analyzer function, so that no abnormality occurs in operation regardless of irregular PC power supply, The present invention provides an integrated measurement device using a USB interface that performs a protection function for notifying a PC power failure when the input power fluctuates largely or falls below a certain power supply.
An integrated measurement device using a USB interface according to the present invention for achieving the above object, the operation is set based on the measurement target device and the function setting data of the oscilloscope or logic analyzer input from the PC connected to the USB, and using the oscilloscope It performs attenuation, amplification, digital conversion, and sampling of the analog input signal inputted from the connected measurement target device, and then transfers the sampled data to the PC through the USB interface, and inputs from the connected measurement target device to use the logic analyzer. After the digital logic signal is sampled, the integrated instrument which transfers the sampled data to the PC through the USB interface, and the integrated instrument and USB are connected, and the function setting data of the integrated instrument according to the user's operation is To the integrated instrument And performing processing of the data based on the sampling data inputted through the USB interface from the instrumental, and a PC that by displaying the processed data on the display to check for abnormalities.
The integrated instrument may further include a signal input unit for receiving a signal generated from the measurement target device through a probe, attenuating and amplifying the analog input signal input from the measurement target device through the signal input unit, and converting the attenuated and amplified analog signal into a digital signal. A digital oscilloscope that converts the digital signal into a digital signal, a logic analyzer that samples 16 channels of digital logic signals input from the measuring device through the signal input unit, and the oscilloscope or logic analyzer input data from a PC. It outputs to a digital oscilloscope and logic analyzer, and includes a USB connection for transferring sampling data from the digital oscilloscope and logic analyzer to a PC.
As described above, according to the integrated measurement device using the USB interface of the present invention, the digital oscilloscope function of the 200 MHz band and the sampling 16 channel logic analyzer function which are inevitably required for the development of electronic products are integrated into one of the conventional commercial oscilloscope and logic analyzer. The display and monitoring applications are handled by a PC connected via a USB interface, which greatly reduces the size and cost of the product, and makes it possible to use two devices at a low cost. It is convenient for product A / S personnel to directly repair the product in the field, and it is possible to diagnose and repair the equipment at a long distance by transmitting various measurement data and information through the Internet in real time.
In addition, the integrated instrument with a digital oscilloscope and logic analyzer function is designed to be powered by a PC power source connected via a USB interface, and to use a separate power supply such as an adapter when an abnormal PC power supply causes an abnormal operation. And if the fluctuation range of input power is big or less than a certain power, it protects the PC power.
In addition, because of the cost, small and medium-sized companies that use only oscilloscopes, and small industrial or educational sites, the integrated instrument with the built-in digital oscilloscope and logic analyzer function can be used together with the oscilloscope and expensive logic analyzers. As the burden on equipment is reduced, it can play a sufficient role as activating product development in the industrial field and educational equipment in the field of education, thereby enhancing the development of microcomputer design and application developers and strengthening product competitiveness.
Hereinafter, an integrated measuring device using a USB interface of the present invention will be described in detail with reference to the accompanying drawings.
1 is a block diagram schematically showing the configuration of an integrated measurement device using a USB interface according to the present invention.
As shown, the integrated measuring device of the present invention is composed of the
The
The integrated
The PC 300 is a notebook computer, a desktop computer, or the like, and is connected to the integrated
In other words, the integrated measurement device of the present invention is a high-speed calculation processing and screen output function of the
In addition, the
The integrated
The
The
The
The
In addition, the integrated
FIG. 2 is a detailed block diagram illustrating the configuration of the
As shown, the
That is, the processing of the sampling data is processed by the
The
The
The
The analog /
The digital /
The
The digital signal processing (FPGA; field programmable gate array)
FIG. 3 is a view for explaining the operation of the
On the other hand, the digital signal sampled through the
Such software is largely a hardware interface for controlling the
The hardware interface may be configured to notify the current hardware status of the oscilloscope or read sampling data into the PC 300 (FPGA register read), and write operation for transferring various variables for hardware control of the oscilloscope (FPGA register write). , A function of reading a signal directly connected to an input / output (I / O) port (direct register read), a function of checking whether a hardware of the
The data processor provides a function of prescaling input data, and bypasses and frequency components that are only scattered on the screen without a specific mathematical algorithm when displaying the prescaled data. Math functions such as FFT (Fast Fourier Transform), Sinc Interpolation that smoothly connects rough sampling intervals, and Finite Impulse Response (FIR) filters that cut out components above a certain frequency, and grids when using digital oscilloscopes. It is common to judge the intuition of the observer and the waveform, but when the cursor needs to be used for accurate measurement, it provides two cursors, one for vertical and one for horizontal (the horizontal cursor is used for measuring vertical components (voltage, gain)). , The vertical cursor is used to measure the horizontal component (time, frequency) Function, an autoset function to set an environment that can ideally see the waveform currently being input, and a calibration function used to correct a different characteristic in the hardware manufacturing process or the use environment. There is this.
The transfer function corrects the error due to the environment and the clipboard function that saves the screen being measured to the clipboard for use in other programs, the file for storing the environment variables related to the oscilloscope execution. A hard disk drive (HDD) interface function, such as a calibration result file, which is a function to be executed, and a waveform file, which is a function of storing or loading a displayed waveform into a file.
The user interface includes the display function according to the scope mode, FFT mode, SINC Interpolation, XY mode, cursor on / off selection, horizontal scroll function, trigger lamp function, color setting function to change the color of the display window, and I / O port selection. Configuration function such as probe selection, probe function, backdoor function provided to hardware developers and after-sales service personnel, help function containing information related to the production of digital oscilloscope, and warning to user during program execution. There is a message box for providing a message for a function such as confirmation / notification, and a printer interface for automatically outputting a waveform currently being displayed.
4 is a diagram illustrating an example of an execution screen for calculating and displaying data measured by the
FIG. 6 is a detailed block diagram illustrating the configuration of the
As shown, the
The
The digital /
The
The
The
The
The
FIG. 7 is a block diagram illustrating the configuration of the
8 and 9 are views illustrating an example of a sampling timing diagram performed by the
FIG. 10 is a view illustrating an operation structure of a ring buffer for explaining a mechanism of storing sampling data by using the
FIG. 11 is a diagram for describing an operation of the
FIG. 12 is a diagram illustrating a position of a trigger generated by the
FIG. 13 is a diagram schematically illustrating a configuration of the
14 is a flowchart illustrating the operation of the
That is, when power is supplied to the logic analyzer 230 (S10), the
When the command reception from the
When an interrupt is generated from the
On the other hand, the digital signal sampled through the
As described above, the software implemented on the
That is, when the software is started, the software and hardware are initialized by reading the configuration file, and when the command of data acquisition occurs, the acquired data is read from the hardware through the USB interface, stored in the memory of the PC, and the acquired data is displayed on the screen. It displays the signal in and analyzes the data through the control object. You can also save and print data files.
The user graphical interface can be divided into two parts: controlling hardware characteristics for data acquisition, and a main GUI section for displaying and analyzing data from the logic analyzer's hardware.
As shown in FIG. 15, the hardware controlling part shows a list of connected logic analyzers and selects a module name that can be selected, a sample clock speed that selects a sampling rate of data, and a threshold setting of a hardware signal. Control setting part, and values related to the trigger which is the basis of data acquisition (for example, the trigger position which determines where the trigger position is to be viewed from the whole data, the trigger type which sets the pattern type and the edge type, etc.) There is a trigger setting part.
As shown in FIG. 16, the main GUI part is a signal display showing 2048 samples with values of 0 and 1 for each channel, and a cursor display where data values at that point are displayed for each channel when a mouse is clicked on the signal display screen. The display part consists of a pattern that can change the trigger value with six patterns each time the mouse is clicked, the channel where the name of each channel is displayed, and the position and size of the part displayed on the screen for the entire part of the data. A diagram that shows the zoom, multi-sized zooming, page movement for data movement back and forth on the screen, trigger points, X cursor points, O cursor points, and time values between two points based on each criterion. Display control part composed of time base control, etc., and start / end of data read , Whether to receive in succession the data one-time selection of whether to receive, can be divided into the acquisition control portion is configured to read data of a current status indicator.
FIG. 17 is a diagram illustrating an example of an execution screen for calculating and displaying data sampled by the
Herein, while the present invention has been described with reference to the preferred embodiments, those skilled in the art will variously modify the present invention without departing from the spirit and scope of the invention as set forth in the claims below. And can be changed.
1 is a block diagram schematically showing the configuration of an integrated measurement device using a USB interface according to the present invention;
2 is a block diagram showing in detail the configuration of the digital oscilloscope of FIG.
3 is a view for explaining the operation of the trigger of FIG.
4 is a diagram illustrating an example of an execution screen displaying data measured by the digital oscilloscope of FIG. 2 on a PC;
5 is a diagram illustrating various examples of waveforms measured by the digital oscilloscope of FIG. 2;
6 is a block diagram showing in detail the configuration of the logic analyzer of FIG.
7 is a block diagram illustrating in more detail the configuration of the digital signal processor of FIG. 6;
8 is a diagram illustrating an example of a sampling timing diagram performed by the sampling unit of FIG. 7;
9 is a view for explaining the operation of the sampling unit of FIG.
FIG. 10 is a view illustrating an operation structure of a ring buffer for explaining a mechanism of storing sampling data using a memory in the external memory interface of FIG. 7; FIG.
FIG. 11 is a diagram for describing an operation of an internal memory unit of FIG. 7;
12 is a view illustrating a position of a trigger generated in the trigger unit of FIG. 7;
FIG. 13 is a view schematically illustrating a configuration of a trigger unit of FIG. 7;
14 is a flow chart for explaining in detail the operation of the microprocessor of FIG.
15 is a view showing an example of a setting dialog for controlling hardware characteristics of a logic analyzer displayed on a PC;
16 is a diagram illustrating an example of a main GUI of a logic analyzer displayed on a PC;
FIG. 17 is a diagram illustrating an example of an execution screen displaying data measured by a logic analyzer of FIG. 6 on a PC; FIG.
FIG. 18 is a diagram illustrating a 100 MHz read / write simulation result of SRAM using the logic analyzer of FIG. 6.
Explanation of symbols on the main parts of the drawings
100: measuring target device 200: integrated instrument
210: signal input 220: digital oscilloscope
221: attenuation part 222: amplification part
223: analog / digital converter 224: digital / analog converter
225: trigger unit 226: digital signal processing unit
230: logic analyzer 231: digital to analog converter
232: comparison unit 233: digital signal processing unit
234: memory 235: microprocessor
236: power supply 240: USB connection
300: PC
Claims (8)
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KR1020090042058A KR20100123052A (en) | 2009-05-14 | 2009-05-14 | Apparatus for integrating measurement using an usb interface |
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KR1020090042058A KR20100123052A (en) | 2009-05-14 | 2009-05-14 | Apparatus for integrating measurement using an usb interface |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101657940B1 (en) * | 2015-08-12 | 2016-09-22 | 주식회사 네오텍 | Portable voltage measurement device and voltage measurement method using the same based on USB OTG |
CN116148568A (en) * | 2022-12-30 | 2023-05-23 | 北京航天测控技术有限公司 | Analog signal comprehensive measurement device based on FPGA |
-
2009
- 2009-05-14 KR KR1020090042058A patent/KR20100123052A/en active IP Right Grant
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101657940B1 (en) * | 2015-08-12 | 2016-09-22 | 주식회사 네오텍 | Portable voltage measurement device and voltage measurement method using the same based on USB OTG |
CN116148568A (en) * | 2022-12-30 | 2023-05-23 | 北京航天测控技术有限公司 | Analog signal comprehensive measurement device based on FPGA |
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