CN203616589U - Multichannel USB data acquisition system - Google Patents
Multichannel USB data acquisition system Download PDFInfo
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- CN203616589U CN203616589U CN201320569095.XU CN201320569095U CN203616589U CN 203616589 U CN203616589 U CN 203616589U CN 201320569095 U CN201320569095 U CN 201320569095U CN 203616589 U CN203616589 U CN 203616589U
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- data acquisition
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- microcontroller
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Abstract
The utility model belongs to the technical field of data acquisition facilities, and particularly relates to a multichannel USB data acquisition system which comprises a data collection card and a computer connected to the data collection card; the data collection card comprises a microcontroller, a user interaction module connected to the microcontroller, a front end data acquisition module and a data processing unit. The USB data acquisition system provided by the utility model can be used conveniently, and a work staff can finish on-site signal acquisition and processing only by taking a notebook computer, a data line and a USB data collection card. The control interface and the data display interface style are friendly. A host control software of the USB data acquisition system uses graphical programming language LabVIEW to compile a host computer software program, therefore, the exploitation period is shortened, and software system can run in high speed with stability. USB communication between the acquisition card and the host is adopted, therefore, environment interference is avoided effectively, and transmission rate is improved. The amplification circuit at the signal acquisition front end is configured appropriately, and multi-grade magnification is provided to prevent signal deletion and distortion.
Description
Technical field
The utility model belongs to data acquisition equipment technical field, particularly relates to a kind of hyperchannel usb data acquisition system.
background technology
Data acquisition system (DAS) function is to gather signals of reality, carries out signal analysis and shows to user after being converted to digital signal.The advantage that data acquisition system (DAS) is compared traditional measurement instrument is, data acquisition system (DAS) is converted into the signal gathering digital signal and is transferred to computing machine, and the high-speed computation ability that makes full use of computing machine is processed signal.Data acquisition system (DAS) can gather the parameter in producing, supervision and record, and for improving the quality of products, reducing cost of products provides means.
Data acquisition system (DAS), for traditional surveying instrument, has fast, sensitive, and particularly cheap advantage also has the unexistent close friend's of traditional instrument interface.Along with further developing of computer technology, computer based data acquisition system (DAS) will progressively replace traditional instrument, connects the hyperchannel coupling arrangement of computing machine and collected object, becomes and has a problem to be solved.
Utility model content
The problem that the utility model exists for prior art, proposes a kind of hyperchannel usb data acquisition system.
The technical solution of the utility model is: a kind of hyperchannel usb data acquisition system, comprise data collecting card, the computing machine being connected with data collecting card, described data collecting card comprises, microcontroller, is connected to user interactive module, front end data acquisition module and data processing unit on microcontroller.
Described hyperchannel usb data acquisition system, the periphery of described micro controller is connected with crystal oscillating circuit, clock crystal oscillator circuit, reset circuit.
Described hyperchannel usb data acquisition system, the display screen that described user interactive module bag is connected with microcontroller, also comprises the input key being connected with microcontroller.
Described hyperchannel usb data acquisition system; described front end data acquisition module comprises multiplexer circuit, signal filter circuit and analog to digital conversion circuit; analog to digital conversion circuit is connected with the output terminal of signal filter circuit; the input end of signal filter circuit is connected with MUX; MUX output terminal is connected to analog to digital converter by the current foldback circuit of diode and resistance composition, and MUX is also connected with microprocessor simultaneously.
Described hyperchannel usb data acquisition system, described data collecting card arranges data processing unit, and described data processing unit comprises microcontroller, realizes the processing to image data by programming.
The beneficial effects of the utility model are: 1, the utility model usb data acquisition system is easy to use, staff's carrying notebook computer, and data line and usb data capture card just can complete the acquisition and processing to on-site signal.Control interface and data display look & feel close friend.The patterned programming language LabVIEW of the utility model usb data acquisition system host computer control software application carries out writing of upper computer software program, has shortened the construction cycle, and software systems operation is stable at a high speed.
2, the utility model hyperchannel usb data collection cost performance and reliability are higher.Capture card is positioned at on-site signal foremost, has weakened the impact that the decay of simulating signal in transmitting procedure causes, and between capture card and main frame, by usb communication, has effectively avoided the interference of environment, has improved transfer rate.The amplifying circuit configuration of signals collecting front end is suitable, has multistage enlargement factor, the disappearance of anti-stop signal and distortion.System has friendly interface and complicated control ability, can carry out complicated signal processing operations, facilitates user to preserve the analysis of signal data.
Accompanying drawing explanation
Fig. 1 is hyperchannel usb data capture card circuit block diagram of the present utility model;
Fig. 2 is data collecting card circuit diagram;
Fig. 3 is microcontroller and peripheral circuit figure thereof;
Fig. 4 is J-Link debug circuit;
Fig. 5 is usb communication interface and feed circuit;
In figure: 1 is microcontroller, 2 is D/A converting circuit, and 3 is current foldback circuit, and 4 is filtering and amplifying circuit; 5 is multiplexer circuit, and 6 is signal input, and 7 is power reset circuit, and 8 is display screen; 9 is load button, and 10 is communication module, and 11 is debug i/f circuit.
Embodiment
Embodiment 1: a kind of hyperchannel usb data acquisition system, comprise data collecting card, the computing machine being connected with data collecting card, described data collecting card comprises, microcontroller, is connected to user interactive module, front end data processing module and data preprocessing module on microcontroller.
The model of described micro controller is STM32F103R, be connected with crystal oscillating circuit, clock crystal oscillator circuit, reset circuit etc. at the periphery of microcontroller, wherein, reset circuit is connected to 7 pin of microcontroller, crystal oscillating circuit is connected to 5,6 pin of microcontroller, and clock circuit is connected to 3,4 bipods of microcontroller.
The display screen that described user interactive module bag is connected with microcontroller, also comprises the input key being connected with microcontroller.
Described front end data processing module comprises multiplexer circuit, signal filter circuit and analog to digital conversion circuit, multiplexer circuit comprises chip CD4501,13 pin of chip CD4501,14 pin, 15 pin, 12 pin, 1 pin, 5 pin, 2 pin, 4 pin etc. connect input interface, 3 pin of chip CD4501 are connected with input end 2 pin of the chip LM358 in signal amplification circuit filter, output terminal 7 pin of chip LM358 are connected with 1 pin of the chip TLC1543 in analog to digital conversion circuit, output terminal 15 pin of chip TLC1543,16 pin.38 pin, 39 pin, 40 pin, the corresponding connection of 41 pin of 17 pin, 18 pin and microcontroller STM32F103R; 51 pin of microcontroller STM32F103R, 52 pin, 53 pin are connected respectively with 11 pin, 10 pin, 9 pin of multiplexer circuit chips CD4501; Between signal filter circuit and analog to digital conversion circuit, be provided with data preprocessing module, described data preprocessing module is the current foldback circuit of diode and resistance composition.
Data collecting card also has debug i/f circuit, debug i/f circuit comprises a jtag interface, 3 pin of JTAG are connected with 56 pin of microcontroller, 5 pin of JTAG are connected with 50 pin of microcontroller, 7 pin 45 pin of JTAG connect, 9 pin of JTAG are connected with 49 pin of microcontroller, and 13 pin of JTAG are connected with 55 pin of microcontroller, and 15 pin of JTAGA are resetting pin.
Working method: computing machine is applicable to carrying out a large amount of data operation processing, by communicating between USB and computing machine, data collecting card receives the order that host computer sends, and after the operation that fill order is specified, result is transferred to main frame, carries out the transmission of collection signal simultaneously; The microcontroller of data collecting card is core cell, all functions that coordination data capture card is realized; Data collecting card has used between LCD display and key-press module and user mutual, and user can pass through button selection function menu, acquisition channel, and sampling rate, sends acquisition etc.Data collecting card shows interactive menu by LCD display to user.
Data pre-process circuit: signal input front end increases current foldback circuit, strengthens the reliability of data collecting card, prevents the chip circuit of momentary pulse damage capture card inside; Simultaneously, the sensor circuit of front end data acquisition module is converted to electric signal the non-electrical signal in industry spot or experiment, amplifier circuit is processed faint electric signal, filtering circuit carries out filtering, being input to data collecting card processes, data, after front-end processing module and pretreatment module are processed, are transferred to and in host computer computing machine, are carried out subsequent treatment by USB interface.
Claims (4)
1. a hyperchannel usb data acquisition system, comprise data collecting card, the computing machine being connected with data collecting card, is characterized in that: described data collecting card comprises, microcontroller, is connected to user interactive module, front end data acquisition module and data processing unit on microcontroller.
2. hyperchannel usb data acquisition system according to claim 1, is characterized in that: the periphery of described microcontroller is connected with crystal oscillating circuit, clock crystal oscillator circuit, reset circuit; Described user interactive module comprises the display screen being connected with microcontroller, also comprises the input key being connected with microcontroller.
3. hyperchannel usb data acquisition system according to claim 1; it is characterized in that: described front end data acquisition module comprises multiplexer circuit, signal filter circuit and analog to digital conversion circuit; analog to digital conversion circuit is connected with the output terminal of signal filter circuit; the input end of signal filter circuit is connected with MUX; MUX output terminal is connected to analog to digital converter by the current foldback circuit of diode and resistance composition, and MUX is also connected with microprocessor simultaneously.
4. hyperchannel usb data acquisition system according to claim 1, is characterized in that: described data collecting card arranges data processing unit, and described data processing unit comprises microcontroller, realizes the processing to image data by programming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320569095.XU CN203616589U (en) | 2013-09-14 | 2013-09-14 | Multichannel USB data acquisition system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320569095.XU CN203616589U (en) | 2013-09-14 | 2013-09-14 | Multichannel USB data acquisition system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203616589U true CN203616589U (en) | 2014-05-28 |
Family
ID=50769220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320569095.XU Expired - Fee Related CN203616589U (en) | 2013-09-14 | 2013-09-14 | Multichannel USB data acquisition system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203616589U (en) |
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2013
- 2013-09-14 CN CN201320569095.XU patent/CN203616589U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140528 Termination date: 20140914 |
|
| EXPY | Termination of patent right or utility model |