CN204347589U - A kind of embedded data acquisition based on microprocessor and disposal system - Google Patents
A kind of embedded data acquisition based on microprocessor and disposal system Download PDFInfo
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- CN204347589U CN204347589U CN201520024383.6U CN201520024383U CN204347589U CN 204347589 U CN204347589 U CN 204347589U CN 201520024383 U CN201520024383 U CN 201520024383U CN 204347589 U CN204347589 U CN 204347589U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The utility model discloses a kind of embedded data acquisition based on microprocessor and disposal system, this system adopts structuring, modular scheme to carry out the design of hardware and software of system, is one and integrates multi-channel data acquisition and process, to show and the Portable Data-Acquisition System of usb communication in real time.Whole system design for core, comprises the circuit such as LCD interface of 5 analog input channels, tunnel, lithium ion cell charging circuit, SDRAM, NAND flash storage circuit, SPI communication mode with ARM7 embedded microprocessor AT91SAM7SE256.The utility model proposes data Collection & Processing System clear in structure, versatility is good, extensibility is strong, has comparatively wide application prospect in commercial measurement and control field.
Description
Technical field
The utility model belongs to data acquisition and procession field, particularly relate to a kind of embedded data acquisition based on microprocessor and disposal system, this system adopts structuring, modular scheme to carry out the design of hardware and software of system, develops one and integrates multi-channel data acquisition and process, to show and the Portable Data-Acquisition System of usb communication in real time.
Background technology
Data acquisition technology is an important branch of information science, the collection of its research information data, storage, the operation such as process and control.In fields such as intelligent instrument, signal transacting and industry automatic control, all there is the Measurement & Control problem of data.The analog quantitys such as the temperature existed in the external world, pressure, flow, displacement and angle are converted to digital signal, collect computing machine and are processed, show, transmit and record this process further, being namely called " data acquisition ".Data acquisition technology has a wide range of applications in fields such as radar, communication, the underwater sound, remote sensing, geologic prospecting, vibrations engineering, Non-Destructive Testing, language process, intelligent instrument, industry automatic control and biomedical engineerings.There is new trend along with the development of science and technology in data acquisition technology.Along with the development of new material technology, constantly there is novel sensor to occur, make sensor towards integrated, intelligent direction development.A bottleneck of data acquisition system (DAS) is exactly the communication of data.But along with the development of bussing technique office, this problem is also alleviated significantly.Common communication mode has vxi bus, PXI bus, universal serial bus, USB, isa bus, pci bus etc.
At present conventional data acquisition modes is A/D card and 422, the bus boards such as 485, the data acquisition of this kind of mode must rely on PC and complete, inconvenience field studies, and the collection of data and analyze display often can not realize on analog input card, therefore exploitation can realize PC collection data sampling and processing, be shown in one data acquisition system (DAS) there is important practical usage.In commercial Application, data acquisition system (DAS) is mainly based on the hardware plan of X86 and MCU framework.X86 is the CPU of Complex Instruction Set Computing, based on industrial control computer system all more difficult control in power consumption and cost of X86 general processor, is particularly limited by very large in high-end data collecting field.The major defect of SCM Based data acquisition system (DAS) is that processing speed is slow, limited system resources, real-time performance are poor.
Utility model content
The defect existed for above-mentioned prior art and deficiency, the purpose of this utility model is, a kind of embedded data acquisition based on microprocessor and disposal system are provided, this system adopts structuring, modular scheme to carry out the design of hardware and software of system, develops one and integrates multi-channel data acquisition and process, to show and the Portable Data-Acquisition System of usb communication in real time.
In order to realize above-mentioned task, the utility model adopts following technical solution:
A kind of embedded data acquisition based on microprocessor and disposal system, it is characterized in that, comprise embedded microprocessor, host computer, USB device interface, DBGU interface, power supply and reset circuit, clock circuit, LCD interface, keystroke handling circuit, A/D circuit, NAND Flash interface, sdram interface and jtag interface and form; Described embedded microprocessor selects the ARM7 microcontroller AT91SAM7SE256 of Atmel company, and this embedded microprocessor is connected with foregoing circuit mutually as system core device, carries out communication by USB device interface and DBGU interface and host computer.
In this portable data acquisition based on ARM and disposal system, described power supply and reset circuit comprise digital power module, analog power module and reset power module, described digital power module is made up of Linear Tech's LT4080 cake core, becomes 3.3V for CPU, clock chip, NAND Flash, SDRAM and DBGU interface chip etc. the 4.2V voltage transitions that rechargeable lithium ion battery exports; Described analog power module is made up of XC6351A type charge pump voltage inversion device, for the power supply of A/D circuit needs analog power, using digital power 3.3V by the input of 100uH inductance as charge pump voltage phase inverter chip XC6351A120; Described reset power module uses AT91SAM7SE256 type reset controller, can disposal system all resets and provide without any need for peripheral components the reset case occurred recently.
In this portable data acquisition based on ARM and disposal system, described clock circuit by two-way clock input form, be respectively processor work clock and chip FM3116 clock, wherein processor work clock be 18.432M without source crystal; Described keystroke handling circuit utilizes parallel i/o controller (PIO), I/O mouth is configured to general utility functions I/O line, realizes keystroke handling circuit.
The beneficial effects of the utility model are:
Based on portable data acquisition and the disposal system of AT91SAM7SE256, key parameter can be shown in real time, the mode of USB mass-memory unit can store, read acquired original data simultaneously.The hardware circuit design of system comprises 5 analog input channels, tunnel, battery charger, USB mass-memory unit circuit, DBGU AccessPort interface, NAND Flash data memory circuit, sdram interface, LCD liquid crystal display etc.
Native system has 3 large features compared with general data acquisition system (DAS): can realize data acquisition, data processing and be shown in one in real time; Support that lithium ion battery and external power supply are powered; The raw data of collection as mass-memory unit, can be imported computing machine by USB interface by native system.
The embedded data acquisition based on ARM that the utility model proposes and disposal system clear in structure, versatility is good, extensibility is strong, can be the soft and hardware solution that various Embedded Application provides complete set, in commercial measurement and control field, there is comparatively wide application prospect.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments the utility model is further explained explanation.
Fig. 1 is this system hardware circuit function figure;
Fig. 2 is this system lithium ion cell charging and digital power circuit;
Fig. 3 is this system simulation power circuit;
Fig. 4 is this system input signal modulate circuit;
Fig. 5 is this system main program flow block diagram.
Embodiment
Fig. 1 is this system hardware circuit function figure, the ARM minimum system that system comprises AT91SAM7SE256, power supply and reset circuit, clock circuit, the SDRAM synchronous DRAM of 32M, the NAND Flash data storer of 1G are formed and some basic peripheral hardware and interface, comprise: jtag interface, DBGU interface, USB device interface, LCD interface, keystroke handling circuit and AD circuit, key parameter can be shown in real time, the mode of USB mass-memory unit can store, read acquired original data simultaneously.
Fig. 2 is this system lithium ion cell charging and digital power circuit, circuit board has three indicators of the power supply status: charging indicator light, deficient electric pilot lamp and 3.3V pilot lamp.Under normal circumstances, only have that 3.3V pilot lamp is bright shows that electric quantity of lithium ion batteries is sufficient; When giving lithium ion cell charging, USB voltage+the 5V that the power supply of LTC4080 provides for PC, the charge indicator pin CHRG of LTC4080 is drop-down, charging indicator light is lit, when electric quantity of lithium ion batteries be full of pin BAT charging current be reduced to 10% of full charging current time, CHRG becomes high-impedance state, and charging indicator light is extinguished; Voltage monitoring chip XC61CN3502M shows electric quantity of lithium ion batteries state by controlling deficient electric pilot lamp light on and off state.
Fig. 3 is this system simulation power circuit, the power supply of A/D circuit needs analog power, digital power 3.3V is by the input of 100uH inductance as charge pump voltage phase inverter chip XC6351A120, XC6351A is a series of charge pump voltage inversion devices, built-in 4 switch MOS FET, peripheral only needs 3 ceramic condensers, just can form a positive voltage input, high-level efficiency, low power consumption voltage inversion device circuit that negative voltage exports.
Fig. 4 is this system input signal modulate circuit, the signal magnitude sending into measuring amplifier due to each passage or each parameter is not identical, but all to be amplified to the normal voltage of ADC input requirements, therefore the gain of each channel requirements measuring amplifier can realize automatic ride gain or automatic range switching with regard to the data acquisition of each passage, therefore gain-programmed amplifier LTC6915 is employed herein, LTC6915 is a zero shift with digital programmable gain, accurate instrument amplifier, by one, gain is set to 0 by parallel or serial line interface, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048 or 4096.Under the condition adopting single 5V power supply and any setting gain, common-mode rejection ratio (CMRR) is generally 125dB, voltage offsets is lower than 10uV, and temperature drift is less than 50nV/0C, LTC6915 adopts charging balance sample-data technique to convert a differential input voltage to a single-ended signal, amplified this single-ended signal by a zero shift operational amplifier more subsequently, LTC6915 both can use in the single supply application being low to moderate 2.7V, also can adopt two ± 5V power supply time use.
Fig. 5 is this system main program flow block diagram, and Software for Design mainly comprises LCD display routine, button setting program, A/D data acquisition program, data processing and FFT program, the FAT16 supervisory routine of NAND Flash and the USB mass-memory unit driver based on NAND Flash.The programming of software is all based on the Integrated Development Environment IAR under Windows, realize program burn writing and in-circuit emulation by means of J-Link emulator simultaneously, realize RS-232 debug communications by means of DBGU debugging interface and PC, PC carrys out displaying debugging information in real time by terminal emulator SecureCRT.
The utility model person of an ordinary skill in the technical field also can understand in addition to the foregoing, can change combination further in this explanation and illustrated specific embodiment.Although the utility model gives diagram explanation with regard to its preferred embodiment, but person skilled in the art is understood that, in spirit and scope of the present utility model limited in the attached claims, also can make all changes and variation to the utility model.
Claims (4)
1. the embedded data acquisition based on microprocessor and disposal system, it is characterized in that, comprise embedded microprocessor, host computer, USB device interface, DBGU interface, power supply and reset circuit, clock circuit, LCD interface, keystroke handling circuit, A/D circuit, NAND Flash interface, sdram interface and jtag interface and form; Described embedded microprocessor selects the ARM7 microcontroller AT91SAM7SE256 of Atmel company, and this embedded microprocessor is connected with foregoing circuit mutually as system core device, carries out communication by USB device interface and DBGU interface and host computer.
2. a kind of embedded data acquisition based on microprocessor and disposal system as claimed in claim 1, it is characterized in that, described power supply and reset circuit comprise digital power module, analog power module and reset power module, described digital power module is made up of Linear Tech's LT4080 cake core, becomes 3.3V for CPU, clock chip, NAND Flash, SDRAM and DBGU interface chip etc. the 4.2V voltage transitions that rechargeable lithium ion battery exports; Described analog power module is made up of XC6351A type charge pump voltage inversion device, for the power supply of A/D circuit needs analog power, using digital power 3.3V by the input of 100uH inductance as charge pump voltage phase inverter chip XC6351A120; Described reset power module uses AT91SAM7SE256 type reset controller, can disposal system all resets and provide without any need for peripheral components the reset case occurred recently.
3. a kind of embedded data acquisition based on microprocessor and disposal system as claimed in claim 1, it is characterized in that, described clock circuit is made up of the input of two-way clock, be respectively processor work clock and chip FM3116 clock, wherein processor work clock be 18.432M without source crystal.
4. a kind of embedded data acquisition based on microprocessor and disposal system as claimed in claim 1, it is characterized in that, described keystroke handling circuit utilizes parallel i/o controller (PIO), I/O mouth is configured to general utility functions I/O line, realizes keystroke handling circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520024383.6U CN204347589U (en) | 2015-01-14 | 2015-01-14 | A kind of embedded data acquisition based on microprocessor and disposal system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520024383.6U CN204347589U (en) | 2015-01-14 | 2015-01-14 | A kind of embedded data acquisition based on microprocessor and disposal system |
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| CN204347589U true CN204347589U (en) | 2015-05-20 |
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| CN201520024383.6U Expired - Fee Related CN204347589U (en) | 2015-01-14 | 2015-01-14 | A kind of embedded data acquisition based on microprocessor and disposal system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106569022A (en) * | 2016-11-15 | 2017-04-19 | 中国电子科技集团公司第四十研究所 | Low-power-consumption hand-held microwave power meter |
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2015
- 2015-01-14 CN CN201520024383.6U patent/CN204347589U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106569022A (en) * | 2016-11-15 | 2017-04-19 | 中国电子科技集团公司第四十研究所 | Low-power-consumption hand-held microwave power meter |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20160114 |