CN203632342U - Power-off protection circuit and power-off protection device - Google Patents
Power-off protection circuit and power-off protection device Download PDFInfo
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- CN203632342U CN203632342U CN201320744775.0U CN201320744775U CN203632342U CN 203632342 U CN203632342 U CN 203632342U CN 201320744775 U CN201320744775 U CN 201320744775U CN 203632342 U CN203632342 U CN 203632342U
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- power supply
- protecting circuit
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Abstract
The utility model is suitable for the field of net-harddisk video recorders, and especially relates to a power-off protection circuit and a power-off protection device. The power-off protection circuit is connected with a power source and a net-harddisk video recorder separately. The power-off protection circuit is composed of a first switching tube, a battery, a second switching tube and a controller. Thus, the controller is used to detect whether the power source is in the power-down condition on a real-time basis. When a power-down signal is received by the controller, the power source is switched into the battery to supply power to the net-harddisk video recorder continuously so as to ensure the continuous operation of the net-harddisk video recorder; so that the important position continuous uninterrupted monitoring can be realized.
Description
Technical field
The utility model belongs to network hard disk video recorder field, relates in particular to a kind of power-off protecting circuit and power-off protector.
Background technology
Network hard disk video recorder (Network Video Recorder, NVR), is applied to network video monitor and control system; Its major function comprises: receive the digital video bit stream of web camera device transmission by network, the digital video bit stream receiving is stored, managed, utilize its distributed structure/architecture advantage to realize Network Video Surveillance.
At present, in the time of abnormity of power supply power down for to network hard disk video recorder power supply, this network hard disk video recorder cannot normally be worked, and greatly affect in real time, the needs of monitoring constantly.
Utility model content
The purpose of this utility model is to provide a kind of power-off protecting circuit and power-off protector, is intended to solve in the time being used for the abnormity of power supply power down of powering to network hard disk video recorder the problem that network hard disk video recorder cannot work on.
On the one hand, a kind of power-off protecting circuit, is connected with power supply and network hard disk video recorder respectively, and described power-off protecting circuit comprises:
High voltage end, low-voltage end and control end connect respectively the first switching tube of the first power end of the power output end of described power supply, described network hard disk video recorder and the power control terminal of controller;
Battery;
High voltage end, low-voltage end and control end connect respectively the second switch pipe of the second source end of the output of described battery, described network hard disk video recorder and the battery control end of described controller;
The power supply test side of power supply described in detection termination, in the time that the power supply test side from described power supply does not get power-off signal, control described the first switching tube conducting, control described second switch pipe cut-off simultaneously, in the time that the power supply test side from described power supply gets power-off signal, control described the first switching tube cut-off, control the described controller of described second switch pipe conducting simultaneously.
Preferably, described the first switching tube is a NPN type triode, and collector electrode, transmitter and the base stage of a described NPN type triode are respectively high voltage end, low-voltage end and the control end of described the first switching tube.
Preferably, described second switch pipe is the 2nd NPN type triode, and collector electrode, transmitter and the base stage of described the 2nd NPN type triode are respectively high voltage end, low-voltage end and the control end of described second switch pipe.
Preferably, described the first switching tube is the first N-type metal-oxide-semiconductor, and drain electrode, source electrode and the grid of described the first N-type metal-oxide-semiconductor is respectively voltage end, low-voltage end and the control end of described the first switching tube.
Preferably, described second switch pipe is the second N-type metal-oxide-semiconductor, and drain electrode, source electrode and the grid of described the second N-type metal-oxide-semiconductor is respectively voltage end, low-voltage end and the control end of described second switch pipe.
Preferably, described controller is control chip, and detection pin, power supply control pin and the battery control pin of described control chip is respectively test side, power control terminal and the battery control end of described controller.
Preferably, described control chip is arm processor chip, singlechip chip.
Preferably, described control chip is programmable logic device.
Preferably, described control chip is complex programmable logic device (CPLD).
On the other hand, another object of the present utility model is to provide a kind of power-off protector, is connected respectively with power supply and network hard disk video recorder, it is characterized in that, described power-off protector comprises above-mentioned power-off protecting circuit.
The beneficial effects of the utility model are: detecting in real time whether power down of power supply, in the time that controller receives power-off signal, is that battery is to continue to network hard disk video recorder power supply, to ensure that network hard disk video recorder will work on by electrical source exchange; Thereby realize the uninterrupted monitoring that continues to critical positions.
Brief description of the drawings
Fig. 1 is the structure chart of the power-off protecting circuit that provides of the utility model embodiment;
Fig. 2 is a kind of physical circuit figure of the power-off protecting circuit that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 shows the structure of the power-off protecting circuit that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant to the utility model embodiment, and details are as follows.
A kind of power-off protecting circuit, is connected with power supply 7 and network hard disk video recorder 5 respectively, and described power-off protecting circuit comprises:
High voltage end, low-voltage end and control end connect respectively the first switching tube 2 of power output end, the first power end of described network hard disk video recorder 5 and the power control terminal of controller 1 of described power supply 7;
High voltage end, low-voltage end and control end connect respectively the second switch pipe 3 of output, the second source end of described network hard disk video recorder 5 and the battery control end of described controller 1 of described battery 4;
The power supply test side of power supply 7 described in detection termination, in the time that the power supply test side from described power supply 7 does not get power-off signal, control described the first switching tube 2 conductings, control described second switch pipe 3 ends simultaneously, in the time that the power supply test side from described power supply 7 gets power-off signal, control described the first switching tube 2 and end, control the described controller 1 of described second switch pipe 3 conductings simultaneously.
In the present embodiment, under normal circumstances, power to network hard disk video recorder 5 by power supply 7; In the time there is power down in power supply 7, power to network hard disk video recorder 5 by battery 4 temporarily, ensure that in the time period of power supply 7 power down, network hard disk video recorder 5 can normally be worked; Above-mentioned specific works principle is as follows:
Whether the power supply test side of the detection termination power 7 of controller 1, detect in real time power supply 7 and normally power to network hard disk video recorder 5.When power supply 7 is not when power down, the test side of controller 1 can not detect power-off signal, and controller 1 is controlled the first switching tube 2 conductings, and power supply 7 is normally powered to network hard disk video recorder 5; Meanwhile, controller 1 is controlled second switch pipe 3 and is ended, and disconnects battery 4 and powers to network hard disk video recorder 5, the electric energy of storing to preserve battery 4.In the time of power supply 7 power down, the test side of controller 1 can detect power-off signal, controls the first switching tube 2 and ends, and deenergization 7 is powered to network hard disk video recorder 5, and the first power end that prevents network hard disk video recorder 5 is crossed and put; Meanwhile, controller 1 is controlled 3 conductings of second switch pipe, and battery 4 continues to power to network hard disk video recorder 5, thereby while ensureing power supply 7 power down, network hard disk video recorder 5 can continue normal work.
As the utility model one embodiment, described the first switching tube 2 is a NPN type triode Q1, and collector electrode, transmitter and the base stage of a described NPN type triode Q1 are respectively high voltage end, low-voltage end and the control end of described the first switching tube 2.
Particularly, described the first switching tube 2 is a NPN type triode Q1, when power supply 7 is not when power down, the test side of controller 1 can not detect power-off signal, the power control terminal output high level of controller 1, thus the base stage of a NPN type triode Q1 is also high level, the one NPN type triode Q1 conducting, power supply 7 is the first power end power supply to network hard disk video recorder 5 through a NPN type triode Q1.
In the time of power supply 7 power down, the test side of controller 1 detects power-off signal, the power control terminal output low level of controller 1, thereby, the base stage of the one NPN type triode Q1 is also low level, the one NPN type triode Q1 cut-off, a NPN type triode Q1 stops the first power end power supply of power supply 7 to network hard disk video recorder 5.
As the utility model one embodiment, described second switch pipe 3 is the 2nd NPN type triode Q2, and collector electrode, transmitter and the base stage of described the 2nd NPN type triode Q2 are respectively high voltage end, low-voltage end and the control end of described second switch pipe 3.
Particularly, described second switch pipe 3 is the 2nd NPN type triode Q2, when power supply 7 is not when power down, the test side of controller 1 can not detect power-off signal, the battery control end output low level of controller 1, thus the base stage of the 2nd NPN type triode Q2 is also low level, the 2nd NPN type triode Q2 cut-off, the 2nd NPN type triode Q2 stops the second source end power supply of battery 4 to network hard disk video recorder 5.
In the time of power supply 7 power down, the test side of controller 1 detects power-off signal, the battery control end output high level of controller 1, thereby, the base stage of the 2nd NPN type triode Q2 is also high level, the 2nd NPN type triode Q2 conducting, battery 4 is the second source end power supply to network hard disk video recorder 5 through the 2nd NPN type triode Q2.
As the utility model one embodiment, described the first switching tube 2 is the first N-type metal-oxide-semiconductor Q3, and drain electrode, source electrode and the grid of described the first N-type metal-oxide-semiconductor Q3 are respectively voltage end, low-voltage end and the control end of described the first switching tube 2.
Particularly, described the first switching tube 2 is the first N-type metal-oxide-semiconductor Q3, when power supply 7 is not when power down, the test side of controller 1 can not detect power-off signal, the power control terminal output high level of controller 1, thus the grid of the first N-type metal-oxide-semiconductor Q3 is also high level, the first N-type metal-oxide-semiconductor Q3 conducting, power supply 7 is the first power end power supply to network hard disk video recorder 5 through the first N-type metal-oxide-semiconductor Q3.
In the time of power supply 7 power down, the test side of controller 1 detects power-off signal, the power control terminal output low level of controller 1, thereby, the grid of the first N-type metal-oxide-semiconductor Q3 is also low level, the first N-type metal-oxide-semiconductor Q3 cut-off, the first N-type metal-oxide-semiconductor Q3 stops the first power end power supply of power supply 7 to network hard disk video recorder 5.
As the utility model one embodiment, described second switch pipe 3 is the second N-type metal-oxide-semiconductor Q4, and drain electrode, source electrode and the grid of described the second N-type metal-oxide-semiconductor Q4 are respectively voltage end, low-voltage end and the control end of described second switch pipe 3.
Particularly, described second switch pipe 3 is the second N-type metal-oxide-semiconductor Q4, when power supply 7 is not when power down, the test side of controller 1 can not detect power-off signal, the battery control end output low level of controller 1, thus the grid of the second N-type metal-oxide-semiconductor Q4 is also low level, the second N-type metal-oxide-semiconductor Q4 cut-off, the second N-type metal-oxide-semiconductor Q4 stops the second source end power supply of battery 4 to network hard disk video recorder 5.
In the time of power supply 7 power down, the test side of controller 1 detects power-off signal, the battery control end output high level of controller 1, thereby, the grid utmost point of the second N-type metal-oxide-semiconductor Q4 is also high level, the second N-type metal-oxide-semiconductor Q4 conducting, battery 4 is the second source end power supply to network hard disk video recorder 5 through the second N-type metal-oxide-semiconductor Q4.
Preferably, described controller 1 is control chip U1, and detection pin T, the power supply control pin C1 of described control chip U1 and battery control pin C2 are respectively test side, power control terminal and the battery control end of described controller 1.
Further preferably, described control chip U1 is arm processor chip, singlechip chip.For example: described control chip U1 is 51 singlechip chips.
Further preferably, described control chip U1 is programmable logic device, comprise field programmable gate array (Field-Programmable Gate Array, FPGA), CPLD (Complex Programmable Logic Device, CPLD) etc.
Further preferably, described control chip U1 is CPLD.
As the utility model one embodiment, the utility model embodiment also provides a kind of power-off protector, is connected respectively with power supply 7 and network hard disk video recorder 5, and described power-off protector comprises above-mentioned power-off protecting circuit.
Fig. 2 shows the physical circuit of the power-off protecting circuit that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant to the utility model embodiment, and details are as follows.Below in conjunction with Fig. 2 in detail, a kind of concrete operation principle is described in detail:
Whether the detection pin T of control chip U1 connects the power supply test side of described power supply 7, detect in real time power supply 7 and normally power to network hard disk video recorder 5.When power supply 7 is not when power down, the detection pin T of control chip U1 can not detect low level power-off signal, the power supply control pin C1 of control chip U1 exports high level to the grid of the first N-type metal-oxide-semiconductor Q3, the first N-type metal-oxide-semiconductor Q3 conducting, and power supply 7 is normally powered to network hard disk video recorder 5; Meanwhile, the battery control pin C2 of control chip U1 is to the grid output low level of the second N-type metal-oxide-semiconductor Q4, and the second N-type metal-oxide-semiconductor Q4 cut-off, disconnects battery 4 and power to network hard disk video recorder 5, the electric energy of storing to preserve battery 4.In the time of power supply 7 power down, the detection pin T of control chip U1 can detect low level power-off signal, the power supply control pin C1 of control chip U1 exports low high level to the grid of the first N-type metal-oxide-semiconductor Q3, the first N-type metal-oxide-semiconductor Q3 cut-off, deenergization 7 is powered to network hard disk video recorder 5, and the first power end that prevents network hard disk video recorder 5 is crossed and put; Simultaneously, the battery control pin C2 of control chip U1 exports high level to the grid of the second N-type metal-oxide-semiconductor Q4, the second N-type metal-oxide-semiconductor Q4 conducting, and battery 4 continues to power to network hard disk video recorder 5, thereby while ensureing power supply 7 power down, network hard disk video recorder 5 can continue normal work.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (10)
1. a power-off protecting circuit, is connected with power supply and network hard disk video recorder respectively, it is characterized in that, described power-off protecting circuit comprises:
High voltage end, low-voltage end and control end connect respectively the first switching tube of the first power end of the power output end of described power supply, described network hard disk video recorder and the power control terminal of controller;
Battery;
High voltage end, low-voltage end and control end connect respectively the second switch pipe of the second source end of the output of described battery, described network hard disk video recorder and the battery control end of described controller;
The power supply test side of power supply described in detection termination, in the time that the power supply test side from described power supply does not get power-off signal, control described the first switching tube conducting, control described second switch pipe cut-off simultaneously, in the time that the power supply test side from described power supply gets power-off signal, control described the first switching tube cut-off, control the described controller of described second switch pipe conducting simultaneously.
2. power-off protecting circuit as claimed in claim 1; it is characterized in that; described the first switching tube is a NPN type triode, and collector electrode, transmitter and the base stage of a described NPN type triode are respectively high voltage end, low-voltage end and the control end of described the first switching tube.
3. power-off protecting circuit as claimed in claim 1; it is characterized in that; described second switch pipe is the 2nd NPN type triode, and collector electrode, transmitter and the base stage of described the 2nd NPN type triode are respectively high voltage end, low-voltage end and the control end of described second switch pipe.
4. power-off protecting circuit as claimed in claim 1, is characterized in that, described the first switching tube is the first N-type metal-oxide-semiconductor, and drain electrode, source electrode and the grid of described the first N-type metal-oxide-semiconductor is respectively voltage end, low-voltage end and the control end of described the first switching tube.
5. power-off protecting circuit as claimed in claim 1, is characterized in that, described second switch pipe is the second N-type metal-oxide-semiconductor, and drain electrode, source electrode and the grid of described the second N-type metal-oxide-semiconductor is respectively voltage end, low-voltage end and the control end of described second switch pipe.
6. power-off protecting circuit as claimed in claim 1; it is characterized in that; described controller is control chip, and detection pin, power supply control pin and the battery control pin of described control chip is respectively test side, power control terminal and the battery control end of described controller.
7. power-off protecting circuit as claimed in claim 6, is characterized in that, described control chip is arm processor chip, singlechip chip.
8. power-off protecting circuit as claimed in claim 6, is characterized in that, described control chip is programmable logic device.
9. power-off protecting circuit as claimed in claim 8, is characterized in that, described control chip is complex programmable logic device (CPLD).
10. a power-off protector, is connected with power supply and network hard disk video recorder respectively, it is characterized in that, described power-off protector comprises the arbitrary described power-off protecting circuit of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320744775.0U CN203632342U (en) | 2013-11-21 | 2013-11-21 | Power-off protection circuit and power-off protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320744775.0U CN203632342U (en) | 2013-11-21 | 2013-11-21 | Power-off protection circuit and power-off protection device |
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| CN203632342U true CN203632342U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320744775.0U Expired - Fee Related CN203632342U (en) | 2013-11-21 | 2013-11-21 | Power-off protection circuit and power-off protection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634577A (en) * | 2017-09-18 | 2018-01-26 | 成都秦川物联网科技股份有限公司 | Outage detection control circuit and gas meter, flow meter |
| CN109144218A (en) * | 2018-06-19 | 2019-01-04 | 北京海博思创科技有限公司 | Power-down protection apparatus and terminal |
| CN111737050A (en) * | 2020-06-06 | 2020-10-02 | 苏州浪潮智能科技有限公司 | Power-down hard disk protection device and method and server |
-
2013
- 2013-11-21 CN CN201320744775.0U patent/CN203632342U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634577A (en) * | 2017-09-18 | 2018-01-26 | 成都秦川物联网科技股份有限公司 | Outage detection control circuit and gas meter, flow meter |
| CN107634577B (en) * | 2017-09-18 | 2023-06-27 | 成都秦川物联网科技股份有限公司 | Power-off detection control circuit and gas meter |
| CN109144218A (en) * | 2018-06-19 | 2019-01-04 | 北京海博思创科技有限公司 | Power-down protection apparatus and terminal |
| CN109144218B (en) * | 2018-06-19 | 2021-04-13 | 北京海博思创科技股份有限公司 | Power-down protection device and terminal |
| CN111737050A (en) * | 2020-06-06 | 2020-10-02 | 苏州浪潮智能科技有限公司 | Power-down hard disk protection device and method and server |
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| 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: 20140604 Termination date: 20181121 |