CN204167888U - There is the hazard prediction terminal of input protection - Google Patents
There is the hazard prediction terminal of input protection Download PDFInfo
- Publication number
- CN204167888U CN204167888U CN201420570714.1U CN201420570714U CN204167888U CN 204167888 U CN204167888 U CN 204167888U CN 201420570714 U CN201420570714 U CN 201420570714U CN 204167888 U CN204167888 U CN 204167888U
- Authority
- CN
- China
- Prior art keywords
- diode
- circuit board
- control circuit
- resistance
- hazard prediction
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a kind of hazard prediction terminal with input protection, comprise control circuit board, it is characterized in that: the input port of described control circuit board is connected with protective circuit, described protective circuit comprises diode D1, diode D2, diode D3, resistance R and electric capacity C, described diode D1 and the negative pole of diode D2 are all connected on power supply VCC, the two ends of described resistance R are connected on the positive pole of diode D1 and diode D2, the positive pole of described diode D2 is connected on the negative pole of diode D3, the plus earth of described diode D3, the positive pole of described diode D1 is connected with ground capacity C, the negative pole of described diode D3 is connected on the input port of control circuit board, it connects protective circuit on the input port of control circuit board, ensure the normal work of control circuit board, and protective circuit structure is simple.
Description
Technical field
The utility model relates to hazard prediction field of terminal, particularly, relates to a kind of hazard prediction terminal with input protection.
Background technology
Sichuan is in basin, and its water yield is large, makes the ground that takes place frequently becoming bloods and droughts, and climate change, the aggravation of activity in production, and Extreme Weather Events exacerbates the generation of floods and droughts the condition of a disaster more.As one of natural calamity the most serious in the world, flood is almost annual all to be occurred in China, and the casualties that its frequent degree and other natural calamities caused thereof cause and property loss, far above developed country.
So far, the direct economic loss that floods cause has reached more than 2,000 hundred million yuan, and death and missing toll are more than 2000 people.And the especially big flush flood and debris flow disaster of similar Zhouqu County, cause huge casualties and property loss.The annual precipitation of Zhouqu County only has 200-300 milliliter usually, the precipitation of 40 minutes just reached 90 milliliters at that time, if it is good that monitoring, forecast are done, then likely reduce casualties, because always there is a time difference from rainfall to mountain torrents debris flow formation, emergent transfer and escape can be implemented, reduce property loss and casualties.Therefore government attaches great importance to disaster alarm.
Hazard prediction terminal is Microprocessor S3C44B0X substantially, this electronic equipment interfaces is by issuing a dcs or SCADA(supervisory control and data aquisition system in physics circle) telemetry equipment, system changes system based on the connecting object of control message.The electronic devices and components of its inside of hazard prediction terminal are more, are generally arranged on outdoor, its bad environments, seem very important to the protection of internal electronic element.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of hazard prediction terminal with input protection, and it connects protective circuit on the input port of control circuit board, ensure the normal work of control circuit board, and protective circuit structure is simple.
The technical scheme in the invention for solving the above technical problem is:
There is the hazard prediction terminal of input protection, comprise control circuit board, it is characterized in that: the input port of described control circuit board is connected with protective circuit, described protective circuit comprises diode D1, diode D2, diode D3, resistance R and electric capacity C, described diode D1 and the negative pole of diode D2 are all connected on power supply VCC, the two ends of described resistance R are connected on the positive pole of diode D1 and diode D2, the positive pole of described diode D2 is connected on the negative pole of diode D3, the plus earth of described diode D3, the positive pole of described diode D1 is connected with ground capacity C, the negative pole of described diode D3 is connected on the input port of control circuit board.In the utility model, the input port of control circuit board connects the diode of anti-pulse, extraneous spike can be prevented the interference of control circuit board.Resistance R first mainly plays metering function, and electric current forms pressure drop on resistance R, avoids big current ramp metering circuit board; Secondly resistance R and electric capacity C forms integrating circuit, and induced voltage postpones to external world.The input of protective circuit of the present utility model and Vi end are when being subject to external interference, and no matter its interference is electrical, all the amplitude of voltage can be limited in the scope that control circuit board can bear.When Vi-VCC end is the positive pulse that amplitude is larger, diode D1 forward conduction, realizes the protection to subsequent conditioning circuit; When Vi-VCC end is the negative pulse that amplitude is larger, diode D2 reverse breakdown; When Vi-hold as the larger positive pulse of amplitude, diode D2 reverse breakdown; When Vi-hold as the larger negative pulse of amplitude, diode D3 forward conduction; Diode D1, diode D2, diode D3 play clamper protective effect, and namely no matter Vi holds the external interference which kind of is subject to, and protective circuit can be protected control circuit board, and the circuit structure of whole protective circuit is simple.
As preferably, the resistance of described resistance R is 1000 ohm to 2000 ohm.Resistance R mainly plays metering function, and the resistance of resistance R is higher, and its metering function is better.But the resistance of resistance R is excessive, affect the normal operation of control circuit, namely electric current does not reach the requirement of normal work.
Further, the capacitance of described electric capacity C is 100F to 200F.Resistance R and electric capacity C forms integrating circuit, and time delay is carried out in interference to external world.
Further, described diode D1, diode D2, diode D3 are IN4001.IN4001 is a kind of large-area power device, and junction capacitance is large, and operating frequency is low, and high-temperature behavior is good, and reverse leakage current is little, can improve the performance of whole protective circuit, ensures protective circuit runnability, improves the protection to control circuit board.
To sum up, the beneficial effects of the utility model are:
The utility model connects protective circuit on the input port of control circuit board, ensure the normal work of control circuit board, and protective circuit structure is simple.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the utility model do, but execution mode of the present utility model is not limited thereto.
Embodiment 1:
A kind of hazard prediction terminal with input protection as shown in Figure 1, comprise control circuit board, it is characterized in that: the input port of described control circuit board is connected with protective circuit, described protective circuit comprises diode D1, diode D2, diode D3, resistance R and electric capacity C, described diode D1 and the negative pole of diode D2 are all connected on power supply VCC, the two ends of described resistance R are connected on the positive pole of diode D1 and diode D2, the positive pole of described diode D2 is connected on the negative pole of diode D3, the plus earth of described diode D3, the positive pole of described diode D1 is connected with ground capacity C, the negative pole of described diode D3 is connected on the input port of control circuit board.
In the present embodiment, resistance R first mainly plays metering function, and electric current forms pressure drop on resistance R, avoids big current ramp metering circuit board; Secondly resistance R and electric capacity C forms integrating circuit, and induced voltage postpones to external world.The input of protective circuit of the present utility model and Vi end are when being subject to external interference, and no matter its interference is electrical, all the amplitude of voltage can be limited in the scope that control circuit board can bear.When Vi-VCC end is the positive pulse that amplitude is larger, diode D1 forward conduction, realizes the protection to subsequent conditioning circuit; When Vi-VCC end is the negative pulse that amplitude is larger, diode D2 reverse breakdown; When Vi-hold as the larger positive pulse of amplitude, diode D2 reverse breakdown; When Vi-hold as the larger negative pulse of amplitude, diode D3 forward conduction; Diode D1, diode D2, diode D3 play clamper protective effect, and namely no matter Vi holds the external interference which kind of is subject to.
Embodiment 2:
A kind of hazard prediction terminal with input protection as shown in Figure 1, in order to make the best performance of protective circuit, the present embodiment is optimized on the basis of embodiment 1, and the resistance of namely described resistance R is 1000 ohm to 2000 ohm.
The capacitance of described electric capacity C is 100F to 200F.
Described diode D1, diode D2, diode D3 are IN4001.
As mentioned above, the utility model can be realized preferably.
Claims (4)
1. there is the hazard prediction terminal of input protection, comprise control circuit board, it is characterized in that: the input port of described control circuit board is connected with protective circuit, described protective circuit comprises diode D1, diode D2, diode D3, resistance R and electric capacity C, described diode D1 and the negative pole of diode D2 are all connected on power supply VCC, the two ends of described resistance R are connected on the positive pole of diode D1 and diode D2, the positive pole of described diode D2 is connected on the negative pole of diode D3, the plus earth of described diode D3, the positive pole of described diode D1 is connected with ground capacity C, the negative pole of described diode D3 is connected on the input port of control circuit board.
2. the hazard prediction terminal with input protection according to claim 1, is characterized in that: the resistance of described resistance R is 1000 ohm to 2000 ohm.
3. the hazard prediction terminal with input protection according to claim 2, is characterized in that: the capacitance of described electric capacity C is 100F to 200F.
4. the hazard prediction terminal with input protection according to claim 1, is characterized in that: described diode D1, diode D2, diode D3 are IN4001.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420570714.1U CN204167888U (en) | 2014-09-30 | 2014-09-30 | There is the hazard prediction terminal of input protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420570714.1U CN204167888U (en) | 2014-09-30 | 2014-09-30 | There is the hazard prediction terminal of input protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204167888U true CN204167888U (en) | 2015-02-18 |
Family
ID=52541539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420570714.1U Expired - Fee Related CN204167888U (en) | 2014-09-30 | 2014-09-30 | There is the hazard prediction terminal of input protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204167888U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218556A (en) * | 2014-09-30 | 2014-12-17 | 成都汉康信息产业有限公司 | Disaster prediction terminal with input protection |
| CN109525543A (en) * | 2018-06-01 | 2019-03-26 | 中央军委后勤保障部信息中心 | A kind of network domains xegregating unit and its control method |
-
2014
- 2014-09-30 CN CN201420570714.1U patent/CN204167888U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218556A (en) * | 2014-09-30 | 2014-12-17 | 成都汉康信息产业有限公司 | Disaster prediction terminal with input protection |
| CN109525543A (en) * | 2018-06-01 | 2019-03-26 | 中央军委后勤保障部信息中心 | A kind of network domains xegregating unit and its control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204167888U (en) | There is the hazard prediction terminal of input protection | |
| CN204575075U (en) | A kind of hydrological telemetering terminal based on RFID | |
| CN103248034A (en) | Lightning protection USB flash disk | |
| CN203233167U (en) | USB flash disk with lightning-protection function | |
| CN101179185A (en) | USB interface short-circuit protection circuit and power supply with USB interface short-circuit protection function | |
| CN104218556A (en) | Disaster prediction terminal with input protection | |
| CN204168665U (en) | Structure simple waterproof water conservancy telemetering terminal | |
| CN202662148U (en) | Electricity utilization information concentrator | |
| CN204167894U (en) | The mountain torrents prediction unit of the resistance to pressure of lightning protection | |
| CN204168666U (en) | Simple type waterproof water conservancy telemetry terminal system | |
| CN204168664U (en) | The waterproof construction of water conservancy telemetering terminal | |
| CN204168667U (en) | There is the water conservancy telemetering terminal of waterproof construction | |
| CN204166320U (en) | The signal input circuit of hazard prediction terminating machine | |
| CN204168668U (en) | Water proof type water conservancy telemetering terminal | |
| CN204964664U (en) | Alternating current ground protection indicating circuit | |
| CN104298155A (en) | Signal input circuit for disaster prediction terminal | |
| CN204165583U (en) | A kind of water conservancy telemetry terminal system | |
| CN203761360U (en) | Electric energy meter RS485 input end protection circuit | |
| CN202917181U (en) | External watchdog and program burn coexisting circuit | |
| CN203324477U (en) | Big Dipper positioning telemetric terminal | |
| CN203720559U (en) | Double-trigger MCU control circuit | |
| CN104244652A (en) | Simple waterproof water conservancy remote measuring machine | |
| CN204131108U (en) | A kind of low power-consumption intelligent surge protector | |
| CN106300243A (en) | A kind of high stability telemetry terminal system | |
| CN202145515U (en) | Lightning protective socket |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Jing Inventor after: Chai Jun Inventor after: Chen Yuliang Inventor after: Geng Hongzhen Inventor before: Chai Jun Inventor before: Zhu Zhengxiu |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: CHAI JUN ZHU ZHENGXIU TO: CHEN JING CHAI JUN CHEN YULIANG GENG HONGZHEN |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20170930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |