CN203466839U - Power failure alarm system of access network terminal equipment - Google Patents
Power failure alarm system of access network terminal equipment Download PDFInfo
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- CN203466839U CN203466839U CN201320524760.3U CN201320524760U CN203466839U CN 203466839 U CN203466839 U CN 203466839U CN 201320524760 U CN201320524760 U CN 201320524760U CN 203466839 U CN203466839 U CN 203466839U
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Abstract
The utility model discloses a power failure alarm system of access network terminal equipment, and belongs to a power failure alarm system. The power failure alarm system comprises an input power supply, an energy storage circuit, a monitoring circuit and an isolation circuit. The energy storage circuit and the monitoring circuit are connected with the input power supply; the isolation circuit is connected with the monitoring circuit, a relative functional module of the terminal equipment and a work voltage input; the power failure alarm system stores energy through the energy storage circuit; the power failure alarm system outputs a monitoring signal through the monitoring circuit; and the isolation circuit selects whether connection between the relative functional module of the terminal equipment and the work voltage input is in a conductive state according to a voltage value of the monitoring signal. The power failure alarm system is advantageous in that: through reduction of power supply loads after power failure, a power-on time is prolonged, so objects of reduction of capacitance values of charging capacitors and PCB spaces occupied by the capacitors are achieved; and added devices is less, so production cost is reduced.
Description
Technical field
The utility model relates to a kind of power fail warning system, relates in particular to a kind of power fail warning system of Access Network terminal equipment.
Background technology
Computer network communication is related to the stable sustainable development of national economy, therefore its stability and reliability is had relatively high expectations.Wherein, Access Network be backbone network to the interconnection network between user terminal, only have by Access Network and service could be offered to terminal use, for the stability of whole network, have important effect.Due to the direct intended for end consumers of Access Network, the situation that Access Network faces can more complicated.For example, after the unexpected power down of local side apparatus, may, due to local side apparatus ignorant, will produce a series of network connection error.Therefore, how further improve and stability and reliable just connection become the problem that must consider as the Access Network of " last kilometer " between from backbone network to user terminal.
To this, in prior art, by employing, increase the method for power fail warning (Dying gasp) function, make the operating state that local side apparatus can real-time monitoring terminal equipment.Terminal equipment needs to local side apparatus, to report operating state in real time, when the input voltage of terminal equipment cannot meet the moment that makes its normal operation, to local side apparatus, send a device looses power, the message that possibly cannot work, therefore local side apparatus makes respective record and reaction, with this, realizes the reliable connection between terminal equipment and local side apparatus.For this reason, terminal equipment needs can be after power-off suddenly, by the accumulator a bit of time of maintenance work (the millisecond order of magnitude) again of self.The capacitance of accumulator the more maintainable operating time longer, otherwise the time shorter.In general, realize Dying gasp function, the capacity of storage capacitor will reach several thousand microfarads.
The problem of this method for designing is, in accumulator, jumbo electrochemical capacitor can cause the larger peak current that powers at short notice, and the large electrochemical capacitor volume of capacitance also can be very large, and its shared PCB space also can be very large, thereby affected layout setting.Current, the circuit design of power fail warning (Dying gasp), is mainly to suppress by slow startup the peak current that powers on that large electric capacity brings, and improves storage capacitor charging voltage.But, generally to realize Dyinggasp function, the capacitance of device interior storage capacitor just need to reach several thousand microfarads, and the large electrochemical capacitor volume of capacitance also can be very large, the space of the PCB that it is shared also can be very large.In addition,, by improving storage capacitor charging voltage to reduce the method for designing in capacitance and its shared PCB space, logical circuit is complicated, increase device is more, production cost is higher.
Utility model content
The purpose of this utility model is, a kind of power fail warning system of Access Network terminal equipment is provided, and solves above technical problem.
Concrete technical scheme is as follows:
A power fail warning system for Access Network terminal equipment, wherein, described power fail warning system comprises input power, accumulator, supervisory circuit, buffer circuit;
Described accumulator and described supervisory circuit are connected with described input power respectively; Described buffer circuit respectively with described supervisory circuit, the input of the correlation function module of described terminal equipment and an operating voltage connects;
Described power fail warning system is carried out energy storage by described accumulator;
Described power fail warning system is by described supervisory circuit output monitoring signal;
Described buffer circuit is according to the magnitude of voltage of described pilot signal, being connected between the correlation function module of selecting terminal equipment described in whether conducting and described operating voltage input.
Preferably, described accumulator comprises a plurality of store voltages elements that connect with parallel form, and one end of a plurality of described store voltages element parallel connected end is connected in described input power, the other end ground connection of parallel connected end.
Preferably, described supervisory circuit comprises a plurality of divider resistances that connect with series connection form, and described supervisory circuit is exported the voltage after described divider resistance dividing potential drop as pilot signal.
Preferably, also comprise cut-ff voltage; Described buffer circuit comprises the first conducting control valve;
Described the first conducting control valve connects respectively described cut-ff voltage, the correlation function module of described operating voltage input and described terminal equipment;
Described the first conducting control valve when not loaded by described cut-ff voltage, being connected between the correlation function module of operating voltage input and described terminal equipment described in conducting; When being loaded by described cut-ff voltage, disconnect being connected between the correlation function module of described operating voltage input and described terminal equipment.
Preferably, described buffer circuit also comprises the second conducting control valve;
Described the second conducting control valve connects respectively described cut-ff voltage and described supervisory circuit;
The conducting when the voltage of described pilot signal is greater than the conducting voltage of described the first conducting control valve of described the second conducting control valve, by described cut-ff voltage grounding; When the voltage of described pilot signal is less than the conducting voltage of described the first conducting control valve, end, make described cut-ff voltage be loaded into described the first conducting control valve.
Preferably, it is characterized in that, described the second conducting control valve is NPN transistor; The base stage of described NPN transistor connects described supervisory circuit, and the collector electrode of described NPN transistor connects described cut-ff voltage, the grounded emitter of described NPN transistor.
Preferably, described the first conducting control valve is P type metal-oxide-semiconductor; The grid of described P type metal-oxide-semiconductor connects described cut-ff voltage, and the drain electrode of described P type metal-oxide-semiconductor connects described operating voltage input, and the source electrode of described P type metal-oxide-semiconductor connects the correlation function module of described terminal equipment.
The beneficial effects of the utility model are:
The power fail warning system of a kind of Access Network terminal equipment of the present utility model, by the power source loads reducing after power down, extend power-on time, thereby realized the object that reduces charging capacitor capacitance and the shared PCB of electric capacity space, the device that the utility model increases is simultaneously less, has reduced production cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the logical construction schematic diagram of embodiment of the power fail warning system of a kind of Access Network terminal equipment of the present invention;
Fig. 2 is the electrical block diagram of embodiment of the power fail warning system of a kind of Access Network terminal equipment of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but not as restriction of the present utility model.
A kind of power fail warning system of Access Network terminal equipment is disclosed in an embodiment of the present utility model.As shown in Figure 1, power fail warning system comprises input power, accumulator, supervisory circuit, buffer circuit, operating voltage input.Wherein, power fail warning system comprises input power, accumulator, supervisory circuit, buffer circuit, operating voltage input; Accumulator and supervisory circuit are connected with input power respectively; Buffer circuit respectively with supervisory circuit, the input of the correlation function module of terminal equipment and operating voltage connects.
Above-mentioned accumulator is used for carrying out energy storage.When input power is during at normal power supply, be also power fail warning system not during power down, accumulator fills by input power can; And when power down, accumulator, by self-discharge, makes terminal equipment can continue to maintain the work of a period of time.
Above-mentioned supervisory circuit is for respectively to processing module and the buffer circuit output monitoring signal of terminal equipment.When normal power supply, supervisory circuit is after processing input power, by its output output monitoring signal.And when power down, because being is now discharged by accumulator, so supervisory circuit is after processing the power supply of being exported by accumulator, by its output output monitoring signal.The magnitude of voltage of the pilot signal before power down is greater than the magnitude of voltage of the pilot signal after power down.
Above-mentioned buffer circuit is according to the variation of magnitude of voltage before and after pilot signal, selects being connected between inputting with operating voltage of the correlation function module of conducting terminal equipment whether.If pilot signal is greater than default threshold value, illustrate that now power supply is normal, buffer circuit maintains the correlation function module of terminal equipment and the connection between operating voltage input; And if pilot signal is less than default threshold value, now terminal equipment generation power down is described, buffer circuit can disconnected end the correlation function module of equipment being connected between inputting with working power, thereby reach in power down process, reduce power source loads, reduce the object of system power dissipation.In a kind of embodiment, the correlation function module of above-mentioned communication terminal can be Switching Module, wireless module, arbitrary other functional module on USB module or communication terminal.
The processing module of above-mentioned terminal equipment selects whether to local side apparatus, send power fail warning signal according to the magnitude of voltage of pilot signal.For example, when the magnitude of voltage of above-mentioned pilot signal is greater than default judgment threshold, supervisory circuit is processed while being input power, illustrates that now equipment is in power supply normal condition, and the processing module of terminal equipment is not sent power fail warning signal to local side apparatus; And if the magnitude of voltage of pilot signal is while being less than default judgment threshold, show now system power failure, the processing module of equipment can send power fail warning signal to local side apparatus at once, informs local side apparatus, and makes corresponding subsequent treatment by local side apparatus.
On the basis of technique scheme, accumulator comprises a plurality of store voltages elements that connect with parallel form, and one end of a plurality of store voltages element parallel connected end is connected in input power, the other end ground connection of parallel connected end.Above-mentioned store voltages element can be a kind of electric capacity.By adopting the form of shunt capacitance, can when guaranteeing accumulator capacity, reduce volume, thereby simplify the laying of pcb board, reduce space hold.As shown in Figure 2, above-mentioned accumulator comprises 3 electric capacity EC1, EC2 and EC3 that are connected in parallel.Further, a kind of electrochemical capacitor of above-mentioned condenser type.EC1, the positive pole of EC2 and EC3 is connected input power VinDC, minus earth.Above-mentioned VinDC can be the direct current input current of 12V.
On the basis of technique scheme, supervisory circuit comprises a plurality of divider resistances that connect with series connection form, and supervisory circuit, using the voltage after divider resistance dividing potential drop as pilot signal, sends to processing module and the buffer circuit of terminal equipment by output.As shown in Figure 2, supervisory circuit comprises two resistance R 1 and R2, as load, carries out dividing potential drop.One end of R1 is as the input 1 of supervisory circuit, and VinDC is connected with input power, and the other end of R1 is connected with R2, and is 2 as the output of supervisory circuit, output monitoring signal.The other end of R2 is done grounding.Therefore, the magnitude of voltage of pilot signal is identical with the magnitude of voltage at R2 two ends.By the resistance of two divider resistances is arranged, just can obtain the pilot signal of corresponding output.
On the basis of technique scheme, power fail warning system also comprises cut-ff voltage.Buffer circuit comprises the first conducting control valve and the second conducting control valve.The first conducting control valve connects respectively cut-ff voltage, the correlation function module of operating voltage input and terminal equipment.The second conducting control valve connects respectively cut-ff voltage and supervisory circuit.The first conducting control valve when not being cut off voltage-drop loading, being connected between the correlation function module of conducting operating voltage input and terminal equipment; When being cut off voltage-drop loading, disconnect being connected between the correlation function module of operating voltage input and terminal equipment.The conducting when the voltage of pilot signal is greater than the conducting voltage of the first conducting control valve of the second conducting control valve, by cut-ff voltage grounding; When the voltage of pilot signal is less than the conducting voltage of the first conducting control valve, end, make cut-ff voltage be loaded into the first conducting control valve.Further, the first above-mentioned conducting control valve can be P type metal-oxide-semiconductor, and the second above-mentioned conducting control valve can be NPN transistor.The base stage of NPN transistor connects supervisory circuit, and the collector electrode of NPN transistor connects cut-ff voltage, the grounded emitter of NPN transistor.The grid of P type metal-oxide-semiconductor connects cut-ff voltage, and the drain electrode of P type metal-oxide-semiconductor connects operating voltage input, and the source electrode of P type metal-oxide-semiconductor connects the correlation function module of terminal equipment.As shown in Figure 2, the input 3 of buffer circuit is connected with the output 2 of supervisory circuit, wherein also comprises resistance R 3, R4 and R5.One end of R3 is the input of buffer circuit, and the other end connects base stage and the R4 of the second conducting control valve Q2, the other end ground connection of R4.The grounded emitter of Q2, collector electrode by R5, connect cut-ff voltage and connect the first conducting control valve Q1 grid.The drain electrode of Q1 connects operating voltage input, and source electrode connects the correlation function module of terminal equipment.R3, the resistance of R4 and R5 can arrange flexibly, as long as can meet when power supply is normal, the voltage that the base stage of the second conducting control valve Q2 obtains can make it to be switched on, and when power-off, the voltage that the base stage of the second conducting control valve Q2 obtains can make it to be cut off, and the voltage that the grid of the first conducting control valve Q1 obtains can make it to be cut off.When the direct-current input power supplying VinDC of 12V is in normal power supply situation, through resistance R 1 and R2 dividing potential drop, the Voltage-output of pilot signal can reach and can obtain voltage, as 1.71V, be greater than the predetermined threshold value level of the processing module alarm for power-off signal Dyinggasp of terminal equipment, as 1.23V, so terminal equipment can not send alarm signal to local side apparatus.Now, the electrochemical capacitor EC1 that the direct-current input power supplying of 12V is accumulator, EC2 and EC3 charging, the second conducting control valve Q2 is switched on, and cut-ff voltage is by the grounded emitter of Q2.Therefore, the grid level of the first conducting control valve Q1 approaches 0V, makes Q1 conducting, so the correlation function module of terminal equipment is inputted and obtained working power by operating voltage, as 3.3V, equipment is worked.And if there is power down in the 12V direct-current input power supplying VinDC course of work, the level value of pilot signal can reduce at once, when pilot signal is less than the threshold level of terminal equipment alarm for power-off signal Dyinggasp, 1.23V described above, terminal equipment can send alarm signal to local side apparatus, the electrochemical capacitor of accumulator starts electric discharge, and makes a bit of time of system held work.Meanwhile, the level value of pilot signal after R3 and R4 dividing potential drop is input to the base stage of the second conducting control valve Q2, and the voltage between base stage and emitter is less than its conduction level, therefore the second conducting control valve Q2 cut-off.Now, cut-ff voltage can be loaded on the grid of the first conducting control valve Q1 by R5, thereby makes its level approach 3.3V, and Q1 disconnects, so the operating voltage of the correlation function module of terminal equipment input 3.3V stops power supply.Before comparing operating voltage input 3.3V power supply and stopping power supply, the power consumption of terminal equipment can obviously reduce.So identical stored energy capacitance can maintain the equipment work longer time, that is to say, if maintain equipment work same time, energy storage used can obviously reduce.The terminal equipment of Access Network, as home gateway product, its power consumption is in about 6W, the storage capacitor needing can be greater than 2000uf.And a kind of embodiment of the present utility model, by reduce power source loads in power down process, can make the capacitance of its storage capacitor be controlled at 1000uf left and right, the storage capacitor capacitance of selecting in accumulator can obviously reduce, so can select the electric capacity that volume is little, make to take PCB space and reduce.
The utility model discloses a kind of power fail warning system of Access Network terminal equipment, employing is different from mentality of designing and the circuit design method of prior art, by the power source loads reducing after power down, extend power-on time, thereby realized the object that reduces charging capacitor capacitance and the shared PCB of electric capacity space, the device that the utility model increases is simultaneously less, has reduced production cost.
The foregoing is only the utility model preferred embodiment; not thereby limit execution mode of the present utility model and protection range; to those skilled in the art; should recognize that being equal to that all utilization the utility model specifications and diagramatic content done replace and the resulting scheme of apparent variation, all should be included in protection range of the present utility model.
Claims (7)
1. a power fail warning system for Access Network terminal equipment, is characterized in that, described power fail warning system comprises input power, accumulator, supervisory circuit, buffer circuit;
Described accumulator and described supervisory circuit are connected with described input power respectively; Described buffer circuit respectively with described supervisory circuit, the input of the correlation function module of described terminal equipment and an operating voltage connects;
Described power fail warning system is carried out energy storage by described accumulator;
Described power fail warning system is by described supervisory circuit output monitoring signal;
Described buffer circuit is according to the magnitude of voltage of described pilot signal, being connected between the correlation function module of selecting terminal equipment described in whether conducting and described operating voltage input.
2. the power fail warning system of Access Network terminal equipment as claimed in claim 1, is characterized in that,
Described accumulator comprises a plurality of store voltages elements that connect with parallel form, and one end of a plurality of described store voltages element parallel connected end is connected in described input power, the other end ground connection of parallel connected end.
3. the power fail warning system of Access Network terminal equipment as claimed in claim 1, is characterized in that,
Described supervisory circuit comprises a plurality of divider resistances that connect with series connection form, and described supervisory circuit is exported the voltage after described divider resistance dividing potential drop as pilot signal.
4. the power fail warning system of Access Network terminal equipment as claimed in claim 1, is characterized in that,
Also comprise cut-ff voltage; Described buffer circuit comprises the first conducting control valve;
Described the first conducting control valve connects respectively described cut-ff voltage, the correlation function module of described operating voltage input and described terminal equipment;
Described the first conducting control valve when not loaded by described cut-ff voltage, being connected between the correlation function module of operating voltage input and described terminal equipment described in conducting; When being loaded by described cut-ff voltage, disconnect being connected between the correlation function module of described operating voltage input and described terminal equipment.
5. the power fail warning system of Access Network terminal equipment as claimed in claim 4, is characterized in that,
Described buffer circuit also comprises the second conducting control valve;
Described the second conducting control valve connects respectively described cut-ff voltage and described supervisory circuit;
The conducting when the voltage of described pilot signal is greater than the conducting voltage of described the first conducting control valve of described the second conducting control valve, by described cut-ff voltage grounding; When the voltage of described pilot signal is less than the conducting voltage of described the first conducting control valve, end, make described cut-ff voltage be loaded into described the first conducting control valve.
6. the power fail warning system of Access Network terminal equipment as claimed in claim 5, is characterized in that, described the second conducting control valve is NPN transistor; The base stage of described NPN transistor connects described supervisory circuit, and the collector electrode of described NPN transistor connects described cut-ff voltage, the grounded emitter of described NPN transistor.
7. the power fail warning system of Access Network terminal equipment as claimed in claim 5, is characterized in that, described the first conducting control valve is P type metal-oxide-semiconductor; The grid of described P type metal-oxide-semiconductor connects described cut-ff voltage, and the drain electrode of described P type metal-oxide-semiconductor connects described operating voltage input, and the source electrode of described P type metal-oxide-semiconductor connects the correlation function module of described terminal equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320524760.3U CN203466839U (en) | 2013-08-26 | 2013-08-26 | Power failure alarm system of access network terminal equipment |
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| CN201320524760.3U CN203466839U (en) | 2013-08-26 | 2013-08-26 | Power failure alarm system of access network terminal equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024448A (en) * | 2014-04-23 | 2015-11-04 | 北京视联动力国际信息技术有限公司 | Power supply power-down processing circuit and network terminal |
| CN105092942A (en) * | 2014-05-06 | 2015-11-25 | 普天信息技术有限公司 | Power down alarm system |
| CN108491059A (en) * | 2018-04-08 | 2018-09-04 | 普联技术有限公司 | A kind of adapter, control device and electronic equipment |
| CN112531876A (en) * | 2020-11-26 | 2021-03-19 | 北京锐安科技有限公司 | Power-down alarm control circuit |
| CN113395177A (en) * | 2021-06-10 | 2021-09-14 | 浙江亿邦通信科技有限公司 | Power failure protection method for 5G gateway |
-
2013
- 2013-08-26 CN CN201320524760.3U patent/CN203466839U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024448A (en) * | 2014-04-23 | 2015-11-04 | 北京视联动力国际信息技术有限公司 | Power supply power-down processing circuit and network terminal |
| CN105024448B (en) * | 2014-04-23 | 2017-07-28 | 北京视联动力国际信息技术有限公司 | A kind of power supply power down process circuit and a kind of network terminal |
| CN105092942A (en) * | 2014-05-06 | 2015-11-25 | 普天信息技术有限公司 | Power down alarm system |
| CN105092942B (en) * | 2014-05-06 | 2018-01-19 | 普天信息技术有限公司 | Power fail warning system |
| CN108491059A (en) * | 2018-04-08 | 2018-09-04 | 普联技术有限公司 | A kind of adapter, control device and electronic equipment |
| CN112531876A (en) * | 2020-11-26 | 2021-03-19 | 北京锐安科技有限公司 | Power-down alarm control circuit |
| CN113395177A (en) * | 2021-06-10 | 2021-09-14 | 浙江亿邦通信科技有限公司 | Power failure protection method for 5G gateway |
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Granted publication date: 20140305 Termination date: 20190826 |