CN205427839U - Computer USB interface data collection system - Google Patents
Computer USB interface data collection system Download PDFInfo
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- CN205427839U CN205427839U CN201620104223.7U CN201620104223U CN205427839U CN 205427839 U CN205427839 U CN 205427839U CN 201620104223 U CN201620104223 U CN 201620104223U CN 205427839 U CN205427839 U CN 205427839U
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- usb interface
- data acquisition
- electrically connects
- logic controller
- fpga logic
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Abstract
Computer USB interface data collection system. Usually, adopt singlechip or DSP as control module in traditional data acquisition device, control the work of AD conversion, storage and other peripheral circuits, utilize interfaces such as PCI, ISA and host computer to communicate by letter. Along with data acquisition to speed, practicality, simplification require increasingly highly, the drawback of traditional data acquisition device also becomes clear day by day. The utility model discloses a constitution includes: AD changes chip (1), AD conversion chip and FPGA logic controller (2) electric connection, FPGA logic controller and USB transmission control ware (3) electric connection, USB transmission control ware and host computer (4) electric connection. The utility model is used for computer USB interface data collection system.
Description
Technical field:
This utility model relates to a kind of USB interface of computer data acquisition unit.
Background technology:
Traditional data acquisition unit generally uses single-chip microcomputer or DSP as control module, control A/D conversion, storage and the work of other peripheral circuits, utilize the interfaces such as PCI, ISA to communicate with host computer.Along with data acquisition to speed, practicality, simplification requirement more and more higher, the drawback of traditional data harvester also becomes clear day by day.
Utility model content:
The purpose of this utility model is to provide a kind of USB interface of computer data acquisition unit.
Above-mentioned purpose is realized by following technical scheme:
A kind of USB interface of computer data acquisition unit, its composition includes: A/D conversion chip, described A/D conversion chip electrically connects with fpga logic controller, and described fpga logic controller electrically connects with USB transmission controller, and described USB transmission controller electrically connects with host computer.
Described USB interface of computer data acquisition unit, described fpga logic controller includes dividing sampling control module, channel selecting module, USB transmission control module.
Described USB interface of computer data acquisition unit, described channel selecting module electrically connects with multiway analog switch by controlling d type flip flop, described multiway analog switch electrically connects with described A/D conversion chip, and described multiway analog switch includes two panels 8 tunnels analogy variable connector.
The beneficial effects of the utility model:
This utility model sends sampling time control bag by host computer to USB transmission controller, acquisition channel and sample frequency are set in time control bag, and then USB transmission controller triggers fpga logic controller and gathers information, fpga logic controller is unwrapped beginning startup A/D change-over circuit according to time control and is carried out analog digital conversion, EOC is followed by the 12bit serial data exported by A/D, and it is converted into the output of 16bit parallel data by serial parallel conversion, then the data message collected is sent to host computer by USB transmission controller.
This utility model uses fpga chip as the logic control core of system, A/D conversion chip uses ADS7817 analog-digital converter, two panels 8 tunnels analogy variable connector CD4501 is used to realize the multiplexing of maximum 16 road analog input channels, achieve the high speed of single-ended 16 tunnels/difference 8 tunnel analog data, collection real-time, portable, after being come selector channel by FPGA control d type flip flop SN74LS174, analogue signal sends into the input of A/D conversion chip, thus carries out data conversion；USB transmission controller uses CY7C68013 chip, carries out the data transfer communications between host computer by controlling the FIFO of USB interface.
Accompanying drawing illustrates:
Accompanying drawing 1 is structured flowchart of the present utility model.
Detailed description of the invention:
Embodiment 1:
A kind of USB interface of computer data acquisition unit, its composition includes: A/D conversion chip 1, described A/D conversion chip electrically connects with fpga logic controller 2, and described fpga logic controller and USB transmission control 3 and electrically connect, and described USB transmission controller electrically connects with host computer 4.
Embodiment 2:
According to the USB interface of computer data acquisition unit described in embodiment 1, described fpga logic controller includes dividing sampling control module 6, channel selecting module 7, USB transmission control module 8.
Embodiment 3:
According to the USB interface of computer data acquisition unit described in embodiment 1 or 2, described channel selecting module electrically connects with multiway analog switch 5 by controlling d type flip flop 9, described multiway analog switch electrically connects with described A/D conversion chip, and described multiway analog switch includes two panels 8 tunnels analogy variable connector.
Claims (3)
1.A kind of USB interface of computer data acquisition unit, its composition includes: A/D conversion chip, it is characterized in that: described A/D conversion chip electrically connects with fpga logic controller, described fpga logic controller electrically connects with USB transmission controller, and described USB transmission controller electrically connects with host computer.
2.USB interface of computer data acquisition unit according to claim 1, is characterized in that: described fpga logic controller includes dividing sampling control module, channel selecting module, USB transmission control module.
3.USB interface of computer data acquisition unit according to claim 2, it is characterized in that: described channel selecting module electrically connects with multiway analog switch by controlling d type flip flop, described multiway analog switch electrically connects with described A/D conversion chip, and described multiway analog switch includes two panels 8 tunnels analogy variable connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620104223.7U CN205427839U (en) | 2016-02-02 | 2016-02-02 | Computer USB interface data collection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620104223.7U CN205427839U (en) | 2016-02-02 | 2016-02-02 | Computer USB interface data collection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205427839U true CN205427839U (en) | 2016-08-03 |
Family
ID=56540428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620104223.7U Expired - Fee Related CN205427839U (en) | 2016-02-02 | 2016-02-02 | Computer USB interface data collection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205427839U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107909798A (en) * | 2017-10-27 | 2018-04-13 | 深圳航天东方红海特卫星有限公司 | A kind of portable collection of multi analogy channel signal device of microsatellite |
-
2016
- 2016-02-02 CN CN201620104223.7U patent/CN205427839U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107909798A (en) * | 2017-10-27 | 2018-04-13 | 深圳航天东方红海特卫星有限公司 | A kind of portable collection of multi analogy channel signal device of microsatellite |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20180202 |