CN207281700U - D/C power automatic switching circuit - Google Patents
D/C power automatic switching circuit Download PDFInfo
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- CN207281700U CN207281700U CN201721253639.6U CN201721253639U CN207281700U CN 207281700 U CN207281700 U CN 207281700U CN 201721253639 U CN201721253639 U CN 201721253639U CN 207281700 U CN207281700 U CN 207281700U
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- abnormal signal
- timer
- power
- detection module
- embedded system
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Abstract
It the utility model is related to D/C power automatic switching circuit, for embedded system, including D/C power, D/C power switchs, abnormal signal detection module, abnormal signal passage, first timer and second timer, D/C power is powered by D/C power switch for embedded system, the receiving terminal connection embedded system of abnormal signal detection module, the output terminal connection abnormal signal passage of abnormal signal detection module, first timer and second timer are opened after abnormal signal channel reception abnormal signal, the powered-down duration of first timer timing D/C power, second timer timing abnormal signal passage closes duration, the output terminal of first timer is connected with D/C power switch, the output terminal of second timer is connected with abnormal signal passage.The utility model has the advantages that simple in structure, reliable.
Description
Technical field
Power electronics field is the utility model is related to, more particularly to a kind of D/C power automatic switching circuit.
Background technology
Embedded system failure power-off at present powers on restoring circuit, generally there is following two implementations：First, directly use
Switch or button；2nd, monitored using additional MCU.But directly need manually to participate in using the method for switch or button；Using
The method of additional MCU monitoring is more complicated, and to consider the reliability when cost of MCU and MCU work.
Utility model content
To solve the above-mentioned problems, the purpose of this utility model is to provide a kind of reliable and stable D/C power automatic switch
Circuit.
In order to realize above-mentioned purpose, the utility model employs following technical solution：
D/C power on-off circuit, for embedded system, including D/C power, D/C power switch, abnormal signal detection module,
Abnormal signal passage, first timer and second timer, D/C power is powered by D/C power switch for embedded system, abnormal
The receiving terminal connection embedded system of signal detection module, the output terminal connection abnormal signal passage of abnormal signal detection module,
First timer is opened after abnormal signal channel reception abnormal signal and second timer, first timer timing D/C power are powered-down
Duration, second timer timing abnormal signal passage close duration, and output terminal and the D/C power switch of first timer connect, the
The output terminal of two timers is connected with abnormal signal passage.
Preferably, abnormal signal detection module includes IMP706 watchdog chips.
Above-mentioned D/C power on-off circuit, is sent to subordinate's circuit by abnormal signal by abnormal signal passage, controls timing
Device is started to work, and switching cooperation by the first timer and D/C power makes D/C power and the separated of embedded system or connect again
Connect, control abnormal signal passage to make it not repeat abnormal signal being sent to subordinate's circuit by the second timer, make DC electric
The reliable and stable operation of source switching circuit energy.
Brief description of the drawings
Fig. 1 is the circuit theory schematic diagram of the utility model.
Wherein：1st, D/C power, 2, D/C power switch, 3, abnormal signal detection module, 4, abnormal signal passage, 5, first is fixed
When device, 6, second timer.
Embodiment
The preferred embodiment of this patent is described in further detail below in conjunction with the accompanying drawings.
A kind of D/C power automatic switching circuit as shown in Figure 1, is opened for embedded system, including D/C power 1, D/C power
Close 2, abnormal signal detection module 3, abnormal signal passage 4, first timer 5 and second timer 6.
D/C power 1 is powered by D/C power switch 2 for embedded system, the receiving terminal insertion of abnormal signal detection module 3
Formula system connects, and whether abnormal for detecting embedded system, abnormal signal detection module 3 includes IMP706 watchdog chips,
The output terminal connection abnormal signal passage 4 of abnormal signal detection module 3.Abnormal signal passage 4 is opened after receiving abnormal signal
First timer 5 and second timer 6, wherein, 5 timing D/C power of first timer, 1 powered-down duration, the timing of second timer 6
Abnormal signal passage 4 closes duration, and first timer 5 is connected with D/C power switch 2, and D/C power switch 2 is opened in first timer 5
Closed after opening, cut off the connection between D/C power 1 and embedded system, the weight after first timer timing of D/C power switch 2
It is new to open, restart embedded system.Then after 6 timing of second timer, abnormal signal passage 4 reopens inspection
Whether survey has abnormal signal submitting.
Embedded system is powered using D/C power, and power supply first passes through D/C power automatic switching circuit, then to embedded
System power supply, while embedded system needs to provide anomaly detection signal and 12VDC supplies electricity to D/C power automatic switching circuit, it is different
Often detection signal should be the TTL/COMS signals of low and high level upset under normal circumstances, should be under abnormal conditions level not
The TTL/COMS signals of change, IMP706 watchdog chips can detect the change of level so as to capture abnormal signal.
Above-mentioned D/C power automatic switching circuit, simple in structure, stable and reliable operation.
Claims (2)
1.DC power switch circuits, for embedded system, it is characterised in that including D/C power, D/C power switch, abnormal signal
Detection module, abnormal signal passage, first timer and second timer, D/C power are embedded system by D/C power switch
Power supply, the receiving terminal connection embedded system of abnormal signal detection module, the output terminal connection of abnormal signal detection module are abnormal
Signalling channel, first timer and second timer, first timer timing are opened after abnormal signal channel reception abnormal signal
The powered-down duration of D/C power, second timer timing abnormal signal passage close duration, the output terminal and D/C power of first timer
Switch connection, the output terminal of second timer are connected with abnormal signal passage.
2. D/C power on-off circuit according to claim 1, it is characterised in that abnormal signal detection module includes IMP706
Watchdog chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721253639.6U CN207281700U (en) | 2017-09-27 | 2017-09-27 | D/C power automatic switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721253639.6U CN207281700U (en) | 2017-09-27 | 2017-09-27 | D/C power automatic switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207281700U true CN207281700U (en) | 2018-04-27 |
Family
ID=61987935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721253639.6U Active CN207281700U (en) | 2017-09-27 | 2017-09-27 | D/C power automatic switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207281700U (en) |
-
2017
- 2017-09-27 CN CN201721253639.6U patent/CN207281700U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 311113 568 Huabao street, Qian Yuan Town, Deqing County, Huzhou, Zhejiang Patentee after: Zhejiang Yibo high tech technology Co., Ltd. Address before: 311112 Liangyuan street, Liangzhu street, Yuhang District, Hangzhou, Zhejiang, 326 Patentee before: Hangzhou Eboylamp Electronics Co.,Ltd. |