CN104102149A - Anti-interference digital-quantity acquisition system - Google Patents
Anti-interference digital-quantity acquisition system Download PDFInfo
- Publication number
- CN104102149A CN104102149A CN201310121755.2A CN201310121755A CN104102149A CN 104102149 A CN104102149 A CN 104102149A CN 201310121755 A CN201310121755 A CN 201310121755A CN 104102149 A CN104102149 A CN 104102149A
- Authority
- CN
- China
- Prior art keywords
- digital
- acquisition system
- module
- tampering
- microprocessor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Power Sources (AREA)
Abstract
The invention discloses an anti-interference digital-quantity acquisition system which includes a microprocessor, a USB interface power supplying circuit, a digital-quantity input interface and a communication module. The digital-quantity input interface is connected to the microprocessor through a buffer. The UEB interface power supplying circuit includes a USB conversion module. One end of the USB conversion module is connected to the microprocessor and the other end of the USB conversion module is connected to an external end. The anti-interference digital-quantity acquisition system is characterized in that an anti-interface module is also arranged at the digital-quantity input interface. The beneficial effects of the anti-interference digital-quantity acquisition system are that a USB power supplying mode is adopted and power is supplied to the system through a USB conversion chip so that the device can obtain a power supply only when inserted into a main control USB interface; and the anti-interference module is arranged at the digital-quantity input end to attenuate phenomena such as electromagnetic interferences, electric frequency interferences and surges and the like so that the acquisition system is protected.
Description
Technical field
The present invention relates to a kind of anti-tampering digital quantity acquisition system.
Background technology
Industry Control, testing ground etc. adopt a large amount of digital quantity acquisition devices, for the running situation of monitoring site, need so a lot of sockets to go to meet power supply, make to connect up very inconvenient, and staff walk about difficultly, easily by electric wire lift-over with tripping, are arrived; There is now the electromagnetic interference (EMI) phenomenon in a lot of places very serious, often the acquisition channel of digital quantity acquisition device is caused to the impacts such as electromagnetic interference (EMI), electricity frequently disturb, surge, thereby Information Monitoring is made a mistake or lost efficacy.
Summary of the invention
Object of the present invention is to overcome the deficiency of present technology, and a kind of anti-tampering digital quantity acquisition system is provided, and solves existing digital quantity acquisition device often because electromagnetic interference (EMI), electricity disturbs frequently or surge the phenomenon of Information Monitoring mistake or inefficacy occurs.
The present invention is achieved through the following technical solutions: anti-tampering digital quantity acquisition system, comprise microprocessor, USB interface feed circuit, digital-quantity input interface and communication module, described digital-quantity input interface is connected to microprocessor by impact damper, USB interface feed circuit comprise USB modular converter, USB modular converter one end is connected to microprocessor, the other end is connected to outer end by USB interface, and described digital-quantity input interface place is also provided with anti-tampering module.
Described anti-tampering module comprises common mode part and differential mode part.
Described common mode partly comprises inductance L
1, L
2and capacitor C
1, C
2.
Described differential mode partly comprises resistance R
1and capacitor C
3.
On described microprocessor, be connected with reseting module and clock module.
On described microprocessor, be connected with state indicating module.
The invention has the beneficial effects as follows:
(1) adopting USB powering mode, is system power supply by a USB conversion chip, this device need to be inserted in the USB interface of master control and obtain power supply;
(2) at digital quantity input end, an anti-tampering module is set, for the phenomenon such as electromagnetic interference (EMI), electricity frequently being disturbed and surge to decay, has protected acquisition system.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is anti-tampering modular structure schematic diagram.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but structure of the present invention is not limited only to following examples:
[embodiment]
As shown in Figure 1, anti-tampering digital quantity acquisition system, comprise microprocessor, USB interface feed circuit, digital-quantity input interface and communication module, described digital-quantity input interface is connected to microprocessor by impact damper, USB interface feed circuit comprise USB modular converter, USB modular converter one end is connected to microprocessor, and the other end is connected to outer end by USB interface, and described digital-quantity input interface place is also provided with anti-tampering module.
As shown in Figure 2, the circuit diagram of anti-tampering module, single anti-tampering module input is introduced the input of two-way digital quantity, general digital data acquisition equipment comprises Multipath digital quantity input, need a plurality of anti-tampering modules to be used in conjunction with, anti-tampering module comprises common mode part and differential mode part, and common mode partly comprises inductance L
1, L
2and capacitor C
1, C
2, inductance L
1, L
2for attenuate high frequency, disturb capacitor C
1, C
2for Y electric capacity, for high frequency common mode is disturbed and introduced the earth; Differential mode partly comprises resistance R
1with X capacitor C
3for over-voltage suppression, disturb, anti-tampering module is mainly protected whole acquisition system.
On described microprocessor, be connected with reseting module and clock module, it is PCF8563 chip that clock module adopts model, and reseting module adopts MAX6315 chip.
On described microprocessor, be connected with state indicating module, state indicating module is display, for showing the communications status of digital-quantity input interface.
The microprocessor of the present embodiment adopts the chip of S3C2410 model; The USB modular converter of the present embodiment adopts AIC1526 chip, and the electric current of 500MA is provided to system.
The present invention obtains power supply by USB port, and the access without external power source, has facilitated use.
In the present invention, digital-quantity input interface external device, sends to microprocessor by the status information of equipment, after microprocessor processes data, by communication module, sends to host computer.
Claims (6)
1. anti-tampering digital quantity acquisition system, comprise microprocessor, USB interface feed circuit, digital-quantity input interface and communication module, described digital-quantity input interface is connected to microprocessor by impact damper, USB interface feed circuit comprise USB modular converter, USB modular converter one end is connected to microprocessor, the other end is connected to outer end by USB interface, it is characterized in that: described digital-quantity input interface place is also provided with anti-tampering module.
2. anti-tampering digital quantity acquisition system according to claim 1, is characterized in that: described anti-tampering module comprises common mode part and differential mode part.
3. anti-tampering digital quantity acquisition system according to claim 2, is characterized in that: described common mode partly comprises inductance L
1, L
2and capacitor C
1, C
2.
4. anti-tampering digital quantity acquisition system according to claim 2, is characterized in that: described differential mode partly comprises resistance R
1and capacitor C
3.
5. anti-tampering digital quantity acquisition system according to claim 1, is characterized in that: on described microprocessor, be connected with reseting module clock module.
6. anti-tampering digital quantity acquisition system according to claim 1, is characterized in that: on described microprocessor, be connected with state indicating module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310121755.2A CN104102149A (en) | 2013-04-10 | 2013-04-10 | Anti-interference digital-quantity acquisition system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310121755.2A CN104102149A (en) | 2013-04-10 | 2013-04-10 | Anti-interference digital-quantity acquisition system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104102149A true CN104102149A (en) | 2014-10-15 |
Family
ID=51670376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310121755.2A Pending CN104102149A (en) | 2013-04-10 | 2013-04-10 | Anti-interference digital-quantity acquisition system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104102149A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2785228Y (en) * | 2005-01-13 | 2006-05-31 | 中国科学院长春光学精密机械与物理研究所 | Power supply noise filter based on electromagnetic compatibility |
| CN2798396Y (en) * | 2005-03-11 | 2006-07-19 | 周熙文 | Antic interference emergency electric source |
| CN1933273A (en) * | 2005-09-12 | 2007-03-21 | 上海浩顺科技有限公司 | Power supply wave shape correcting filter |
| JP4345652B2 (en) * | 2004-11-30 | 2009-10-14 | 住友電気工業株式会社 | Digital video signal interface module |
| CN201497894U (en) * | 2009-08-13 | 2010-06-02 | 东莞市新雷神仿真控制有限公司 | 16-Channel digital data acquisition box |
| CN102998554A (en) * | 2012-10-11 | 2013-03-27 | 苏州爱知电机有限公司 | ARM-based (Advanced RISC Machines-based) power quality detection device |
-
2013
- 2013-04-10 CN CN201310121755.2A patent/CN104102149A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4345652B2 (en) * | 2004-11-30 | 2009-10-14 | 住友電気工業株式会社 | Digital video signal interface module |
| CN2785228Y (en) * | 2005-01-13 | 2006-05-31 | 中国科学院长春光学精密机械与物理研究所 | Power supply noise filter based on electromagnetic compatibility |
| CN2798396Y (en) * | 2005-03-11 | 2006-07-19 | 周熙文 | Antic interference emergency electric source |
| CN1933273A (en) * | 2005-09-12 | 2007-03-21 | 上海浩顺科技有限公司 | Power supply wave shape correcting filter |
| CN201497894U (en) * | 2009-08-13 | 2010-06-02 | 东莞市新雷神仿真控制有限公司 | 16-Channel digital data acquisition box |
| CN102998554A (en) * | 2012-10-11 | 2013-03-27 | 苏州爱知电机有限公司 | ARM-based (Advanced RISC Machines-based) power quality detection device |
Non-Patent Citations (1)
| Title |
|---|
| 沙占友等: "《开关电源优化设计（第2版）》", 31 January 2013, article "EMI滤波器的选择方法", pages: 133~137 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202475455U (en) | Ethernet interface protection circuit | |
| CN203164634U (en) | Digital quantity acquisition system provided with anti-electromagnetic interference circuit | |
| CN202363893U (en) | Digital input electromagnetic interference protection circuit | |
| CN104102149A (en) | Anti-interference digital-quantity acquisition system | |
| CN203014297U (en) | Split-type wire groove | |
| CN202998167U (en) | Protocol converter | |
| CN201656199U (en) | Serial line with USB current-taking function | |
| CN203405491U (en) | Support plate circuit used for electrical energy collection terminal and support plate | |
| CN203086124U (en) | USB 3.0 port static electricity discharge circuit and USB 3.0 port | |
| CN202678953U (en) | Surge protector capable of recording lightning stroke current strength and occurrence time | |
| CN202583796U (en) | Hot-pluggable multichannel analogue output module | |
| CN206322953U (en) | A kind of RJ45 connectors of integrated lightning protection function | |
| CN203930604U (en) | A kind of internal memory power supply board card device | |
| CN201167232Y (en) | Electrostatic protecting equipment for USB interface | |
| CN204289914U (en) | A kind of common RJ45 network information module lightning protection device | |
| CN203149566U (en) | RS232 interface circuit | |
| CN203206258U (en) | Protective circuit for POE (Power over Ethernet) equipment | |
| CN201975780U (en) | Box for preventing potential counterattack | |
| CN203276158U (en) | Multiplex signal interface voltage protection circuit | |
| CN203405811U (en) | USB and serial port merging device and application system thereof | |
| CN103326338A (en) | Anti-interference protective circuit | |
| CN203339426U (en) | Power socket | |
| CN204101938U (en) | A kind of CAN isolated communication protection circuit | |
| CN108259306A (en) | 2.4G wireless bridge devices and its in bad electromagnetic field environment moderate resistance electromagnetic interference system | |
| CN202145515U (en) | Lightning protective socket |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141015 |