CN110133361A - Power down alarm system based on low-voltage monitoring - Google Patents
Power down alarm system based on low-voltage monitoring Download PDFInfo
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- CN110133361A CN110133361A CN201910364766.0A CN201910364766A CN110133361A CN 110133361 A CN110133361 A CN 110133361A CN 201910364766 A CN201910364766 A CN 201910364766A CN 110133361 A CN110133361 A CN 110133361A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2503—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques for measuring voltage only, e.g. digital volt meters (DVM's)
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Abstract
The invention discloses a kind of power down alarm systems based on low-voltage monitoring, comprising: Power Entry Module, the first power conversion module, division module, voltage monitoring module, CPU module, network management processing module and second source conversion module；The first voltage that first power conversion module is supplied power supply is converted to the first DC voltage；Division module is connected to the first power conversion module so that the first DC voltage is converted into the second DC voltage；Voltage monitoring module be connected to division module and converted by division module after the second direct voltage drive, voltage monitoring module have predeterminated voltage, when the second DC voltage drops to predeterminated voltage, voltage monitoring module send the first alarm signal.Power down alarm system based on low-voltage monitoring of the invention, is converted into small voltage for the big voltage for accessing Power Entry Module first, by the small voltage after voltage monitoring module monitoring conversion, can reduce the manufacturing cost of voltage monitoring module.
Description
Technical field
The present invention relates to a kind of power down alarm systems based on low-voltage monitoring.
Background technique
Communications industry is to be related to the important industry of the national economic development, and requirement of the communication apparatus to reliability is compared
Height, so joined power fail warning function.In modern BTS management, the communication equipment in base station is needed to carry out during power down
Alarm, quickly to find failure.So communication equipment can generate power fail warning signal during power down, and communication equipment needs
The time of 1-5ms of power supply is maintained after a power failure, and the power fail warning signal is reliably reported into NM server to realize.
Commercial communication equipment nearly all has dual power supply currently on the market.When a failure disconnects, backup power source can
With horse back switch operating.But when all the electricity went off that this safeguard measure does not just work for entire computer room.In addition, if encountering disconnected
Incoming call at once again once, there is short interruption in customer responsiveness business, can not determine it is to restart caused by software program also
The problem of being power of computer room.
Also the equipment having is in such a way that dual power supply is powered on pond, and after computer room power-off, reserve battery can be switched at once
Working power, equipment normal operation.But the program does not account for situation that battery also can be faulty or battery supply not
It is enough to run for equipment, also will appear power supply short interruption causes customer service to be interrupted, and can not delimit power issue or soft
Part equipment is restarted.Simultaneously as to increase battery, the mold of equipment, structure, hardware design both increase a large amount of cost.
In addition, part manufacturer utilizes capacitor charge and discharge by increasing a large amount of capacitor elements in power input after power-off
Attribute allows the of short duration work of plank to can produce certain warning information for a period of time.According to the calculating to the power fail warning time,
The power consumption of power fail warning time and equipment, entrance capacitance are related, and specific formula is T=K*C/P, wherein when T is power fail warning
Between, K is constant, and C is storage capacitor, and P is equipment power dissipation, as equipment power dissipation increases, needs to be arranged in power input multiple
Big storage capacitor just can guarantee the normal power fail warning of system.
Therefore, there are wretched insufficiencies for power failure warning circuit in the prior art:
(1) as equipment power dissipation is bigger, the capacity for the storage capacitor that power fail warning needs is also bigger, increases on pcb board
Multiple storage capacitors will expend bigger economic cost；In addition, existing directly add storage capacitor in primary power source input interface,
Since primary power source is usually the power supply of big voltage, matched storage capacitor is needed also to need bigger pressure voltage accordingly,
The volume that will lead to storage capacitor increases, and increased costs finally can all improve the hardware cost of equipment；
(2) storage capacitor of large capacity, big pressure voltage can occupy more PCB spaces, capacitance body in pcb board design
Long-pending increase is also easy the problems such as generating interference with structure, to influence energy-storage property；
(3) large capacity, big pressure voltage storage capacitor be more prone to produce electrolyte leakage, bulge the problems such as, generate it is larger
Security quality risk.
Summary of the invention
The present invention provides a kind of power down alarm systems based on low-voltage monitoring, adopt the following technical scheme that:
A kind of power down alarm system based on low-voltage monitoring, comprising:
Power Entry Module, for being connected to power supply to be to the power down alarm based on low-voltage monitoring by plant-grid connection
System；First power conversion module, for being connected to Power Entry Module to be supplied the power supply for being connected to Power Entry Module
First voltage be converted to the first DC voltage, the first DC voltage is less than first voltage；Division module, for being connected to first
Power conversion module is to be converted into the second DC voltage for the first DC voltage, and the second DC voltage is less than the first DC voltage；
Voltage monitoring module, for the second direct voltage drive after being connected to division module and being converted by division module, voltage monitoring
Module has predeterminated voltage, and when the second DC voltage drops to predeterminated voltage, voltage monitoring module sends the first alarm signal；
CPU module, the first alarm signal for being connected to voltage monitoring module and receiving voltage monitoring module transmission
After send the second alarm signal；Network management processing module, for being connected to CPU module and receiving CPU module
The second alarm signal sent is to be handled；Second source conversion module is connected to the first power conversion module for one end
And the other end is connected to CPU module and converts the first DC voltage being converted to through the first power conversion module
At third DC voltage and pass through third direct voltage drive CPU module；Second source conversion module has most unskilled labourer
Make voltage, second source conversion module has minimum, and minimum meets when the second DC voltage drops to
When predeterminated voltage, the first DC voltage is still greater than minimum so that second source conversion module continues working a period of time
To continue to central processing unit module for power supply.
Further, division module includes first resistor and second resistance；One end of second resistance connects the first power supply and turns
It changes the mold block and the other end is connected to first resistor；The other end of first resistor is grounded；The node of first resistor and second resistance is made
The input terminal of voltage monitoring module is connected to for output end.
Further, the ratio range of second resistance and first resistor is more than or equal to 3 and to be less than or equal to 7.8.
Further, second resistance is adjustable resistance.
Further, the power down alarm system based on low-voltage monitoring further includes filter module；Filter module is for eliminating
The fluctuation of the output of first power conversion module；Division module one end is connected to filter module and the other end is connected to voltage monitoring
Module；Second source conversion module one end is connected to filter module and the other end is connected to CPU module.
Further, third DC voltage includes multiple for driving the driving voltage of CPU module.
Further, third DC voltage includes three for driving the driving voltage of CPU module.
Further, the output end of voltage monitoring module is connected to the interrupt interface of CPU module；When second straight
When predeterminated voltage is down in galvanic electricity pressure, voltage monitoring module exports the interrupt interface of low level to CPU module, center
Processor module receives after interrupt interface has received low level and sends the second alarm signal to network management processing module.
Further, first voltage is DC voltage；First power conversion module includes decompression submodule, is depressured submodule
For first voltage to be converted into the first DC voltage.
Further, first voltage is alternating voltage；First power conversion module includes: AC/DC transform subblock, is used for
First voltage is converted into DC voltage；It being depressured submodule, being converted into for will convert into the first voltage after DC voltage
One DC voltage.
The invention has the beneficial effects that the power down alarm system based on low-voltage monitoring provided, is turned by the first power supply
It changes the mold block and the high voltage that the power supply for being connected to Power Entry Module is supplied is converted into low-voltage, and pass through voltage monitoring module
Low-voltage after monitoring conversion, can reduce the support cost of voltage monitoring module, while reducing the sky that the module occupies pcb board
Between size.
Detailed description of the invention
Fig. 1 is the schematic diagram of the power down alarm system of the invention based on low-voltage monitoring；
Fig. 2 is the schematic diagram of another embodiment of the power down alarm system of the invention based on low-voltage monitoring；
Fig. 3 is the circuit diagram of the division module of the power down alarm system based on low-voltage monitoring in Fig. 1.
Specific embodiment
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
As shown in Figure 1 to Figure 2, a kind of power down alarm system based on low-voltage monitoring, comprising: Power Entry Module 1, the
One power conversion module 2, division module 3, voltage monitoring module 4, CPU module 5, network management processing module 6 and the second electricity
Source conversion module 7.
Specifically, Power Entry Module 1 be connected to power supply with by plant-grid connection into the system.First power supply modulus of conversion
Block 2 is connected to Power Entry Module 1, and effect is to be supplied the power supply for being connected to Power Entry Module 1 to be depressured
First voltage is converted to the first DC voltage, and the first DC voltage is less than first voltage.Division module 3 is connected to the first power supply and turns
Block 2 is changed the mold so that the first DC voltage is converted into the second DC voltage, the second DC voltage is less than the first DC voltage.
Voltage monitoring module 4 is connected to division module 3 and by the second direct voltage drive after the conversion of division module 3, electricity
Press monitoring module 4 for monitoring system whether power down, voltage monitoring module 4 have predeterminated voltage, when the second DC voltage decline
When to predeterminated voltage, voltage monitoring module 4 sends the interrupt pin of the first alarm signal to CPU module 5.Voltage prison
Controlling module 4 is specially watchdog chip, and watchdog chip has voltage monitoring input pin and voltage monitoring output pin, voltage
Monitor input pin monitor the second DC voltage, when detect the second DC voltage drop to the predeterminated voltage of watchdog chip with
When lower, trigger voltage monitors output pin and exports low level, is reported to the interrupt pin of CPU module 5.
CPU module 5 is connected to voltage monitoring module 4 and in the first report for receiving the transmission of voltage monitoring module 4
The second alarm signal is sent to network management processing module 6 after alert signal, and network management processing module 6 is connected to CPU module 5 simultaneously
The second alarm signal of the transmission of CPU module 5 is received to be handled.
7 one end of second source conversion module is connected to the first power conversion module 2 and the other end is connected to central processing unit
Module 5 simultaneously is converted into the first DC voltage being converted to through the first power conversion module 2 to be used to drive central processing unit mould
The third DC voltage of block 5, generally, third DC voltage include multiple for driving the driving voltage of CPU module 5,
Preferably, third DC voltage includes three for driving the driving voltage of CPU module 5.Second source conversion module
7 have minimum, and minimum meets the first DC voltage when the second DC voltage drops to predeterminated voltage
Minimum is still greater than so that second source conversion module 7 continues working a period of time to continue to CPU module
5 power supplies.
It is understood that external power supply can be DC power supply or AC power source.When power supply is DC power supply, the
One voltage is DC voltage, and the first power conversion module 2 includes decompression submodule, and first voltage is depressured at the by decompression submodule
One DC voltage.When power supply is AC power source, first voltage is alternating voltage, at this point, the first power conversion module 2 includes
AC/DC transform subblock and decompression submodule, wherein first voltage is converted into DC voltage by AC/DC transform subblock, decompression
Submodule will convert into the first voltage after DC voltage and be depressured into the first DC voltage.As a preferred embodiment,
Division module 3 includes first resistor R1 and second resistance R2.One end of second resistance R2 connects the first power conversion module 2 and another
One end is connected to first resistor R1, the other end ground connection of first resistor R1.The node conduct of first resistor R1 and second resistance R2
Output end is connected to the input terminal of voltage monitoring module 4.Wherein, the ratio range of second resistance R2 and first resistor R1 be greater than
Equal to 3 and it is less than or equal to 7.8.And second resistance R2 is adjustable resistance.Specifically, the output end of voltage monitoring module 4 connects
To the interrupt interface of CPU module 5.When the second DC voltage drops to predeterminated voltage, voltage monitoring module 4 is exported
To the interrupt interface of CPU module 5, CPU module 5 receives after interrupt interface has received low level low level
The second alarm signal is sent to network management processing module 6.
In the present embodiment, external power supply is -48V DC voltage source, and the first power conversion module 2 is converted into 12V
The first DC voltage give entire veneer power supply.Division module 3 includes first resistor R1 and second resistance R2, first resistor R1's
Resistance value is 1k Ω, and the resistance value of second resistance R2 is 5.4k Ω, and the predeterminated voltage of voltage monitoring module 4 is 1.25V, when system is powered down
When, the first DC voltage is reduced to 8V from 12V, at this point, the second DC voltage exported after division module 3 is reduced to 1.25V, electricity
Monitoring module 4 is pressed to export the interrupt interface of low level to CPU module 5, CPU module 5 receives middle disconnecting
Mouth sends the second alarm signal to network management processing module 6 after having received low level.
In the present embodiment, CPU module 5 needs three kinds of driving voltages, respectively 1.0V, 3.3V and 1.5V, the
During the first DC voltage of 12V is converted into tri- driving voltages of 1.0V, 3.3V and 1.5V and is delivered to by two power conversion modules 7
Central processor module 5 is to drive it.Second source conversion module 7 has minimum 4.5V, when the first DC voltage
When dropping to 8V from 12V, second source conversion module 7 still be can work normally to drive CPU module 5 to handle voltage prison
The low level signal that module 4 is sent is controlled, when the first DC voltage is down to 4.5V or less from 8V, second source conversion module 7 stops
Driving voltage only is supplied to CPU module 5, the first DC voltage is down to the time that 4.5V needs more than ten milliseconds from 8V, foot
CPU module 5 retransmits the second alarm after enough voltage monitoring modules 4 send low level signal to CPU module 5
Signal is to network management processing module 6.
It is understood that can be existed by adjusting the resistance value of second resistance R2 with controlling the CPU module 5
Time that can be worked on after system is powered down, for example second resistance R2 is adjusted to 7.8k Ω, when the first DC voltage is from 12V
When dropping to 11V, the second DC voltage is 1.25V, has reached the predeterminated voltage of voltage monitoring module 4, and the first DC voltage from
The time that 11V continues to drop to 4.5V is down to 4.5V from 8V than the first DC voltage and has more more than ten milliseconds, the second resistance that compares R2
When for 5.4k Ω, the time that CPU module 5 can continue working after system is powered down is longer.
It is illustrated in figure 3 second embodiment of the invention, wherein the same digital indication of identical module.Implement with first
Example is compared, and the power down alarm system based on low-voltage monitoring is in addition to including Power Entry Module 1, the first power conversion module 2, dividing
Outside die block 3, voltage monitoring module 4, CPU module 5, network management processing module 6 and second source conversion module 7, also wrap
Include filter module 8.Filter module 8 is used to eliminate the fluctuation of the output of the first power conversion module 2.The connection of 3 one end of division module
To filter module 8 and the other end is connected to voltage monitoring module 4.7 one end of second source conversion module be connected to filter module 8 and
The other end is connected to CPU module 5.Filter module 8 is mainly made of filter circuit, and the structure of filter circuit is existing
Commonly used part in circuit, those skilled in the art can learn that the present invention is just no longer right according to existing disclosed technology
Its structure repeats.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the above embodiments do not limit the invention in any form, all obtained by the way of equivalent substitution or equivalent transformation
Technical solution is fallen within the scope of protection of the present invention.
Claims (10)
1. a kind of power down alarm system based on low-voltage monitoring, which is characterized in that the power down report based on low-voltage monitoring
Alert system includes:
Power Entry Module, for being connected to power supply so that the plant-grid connection to the power down based on low-voltage monitoring to be alarmed
System；
First power conversion module, for being connected to the Power Entry Module so that the electricity of the Power Entry Module will be connected to
The first voltage that source is supplied is converted to the first DC voltage, and first DC voltage is less than the first voltage；
Division module, for being connected to first power conversion module so that first DC voltage is converted into the second direct current
Voltage, second DC voltage are less than first DC voltage；
Voltage monitoring module, for being connected to the division module and being driven by the second DC voltage after division module conversion
Dynamic, the voltage monitoring module has predeterminated voltage, when second DC voltage drops to the predeterminated voltage, the electricity
Monitoring module is pressed to send the first alarm signal；
CPU module, for being connected to the voltage monitoring module and receiving what the voltage monitoring module was sent
The second alarm signal is sent after first alarm signal；
Network management processing module, for being connected to the CPU module and receiving that the CPU module sends
Two alarm signals are to be handled；
Second source conversion module is connected to first power conversion module for one end and the other end is connected to the center
The first DC voltage being converted to through first power conversion module is simultaneously converted into third DC voltage by processor module
And pass through CPU module described in the third direct voltage drive.
The second source conversion module has minimum, and the minimum, which meets, works as second direct current
When the predeterminated voltage is down in pressure, first DC voltage is greater than the minimum so that the second source turns
Mold changing block continues working a period of time to continue to power to the CPU module.
2. the power down alarm system according to claim 1 based on low-voltage monitoring, which is characterized in that
The division module includes first resistor and second resistance；
One end of the second resistance connects first power conversion module and the other end is connected to the first resistor；
The other end of the first resistor is grounded；
The node of the first resistor and the second resistance is connected to the input terminal of the voltage monitoring module as output end.
3. the power down alarm system according to claim 2 based on low-voltage monitoring, which is characterized in that
The ratio range of the second resistance and the first resistor is more than or equal to 3 and to be less than or equal to 7.8.
4. the power down alarm system according to claim 3 based on low-voltage monitoring, which is characterized in that
The second resistance is adjustable resistance.
5. the power down alarm system according to claim 1 based on low-voltage monitoring, which is characterized in that
The power down alarm system based on low-voltage monitoring further includes filter module；
The filter module is used to eliminate the fluctuation of the first power conversion module output；
Described division module one end is connected to the filter module and the other end is connected to the voltage monitoring module；
Second source conversion module one end is connected to the filter module and the other end is connected to the central processing unit mould
Block.
6. the power down alarm system according to claim 1 based on low-voltage monitoring, which is characterized in that
The third DC voltage includes multiple for driving the driving voltage of the CPU module.
7. the power down alarm system according to claim 6 based on low-voltage monitoring, which is characterized in that
The third DC voltage includes three for driving the driving voltage of the CPU module.
8. the power down alarm system according to claim 1 based on low-voltage monitoring, which is characterized in that
The output end of the voltage monitoring module is connected to the interrupt interface of the CPU module；
When second DC voltage drops to the predeterminated voltage, the voltage monitoring module exports low level in described
The interrupt interface of central processor module, the CPU module receive after the interrupt interface has received the low level
Second alarm signal is sent to the network management processing module.
9. the power down alarm system according to claim 1 based on low-voltage monitoring, which is characterized in that
The first voltage is DC voltage；
First power conversion module includes decompression submodule, and the decompression submodule is for the first voltage to be converted into
First DC voltage.
10. the power down alarm system according to claim 1 based on low-voltage monitoring, which is characterized in that
The first voltage is alternating voltage；
First power conversion module includes:
AC/DC transform subblock, for the first voltage to be converted into DC voltage；
It being depressured submodule, being converted into the first DC voltage for will convert into the first voltage after DC voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910364766.0A CN110133361A (en) | 2019-04-30 | 2019-04-30 | Power down alarm system based on low-voltage monitoring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910364766.0A CN110133361A (en) | 2019-04-30 | 2019-04-30 | Power down alarm system based on low-voltage monitoring |
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| CN110133361A true CN110133361A (en) | 2019-08-16 |
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| CN201910364766.0A Pending CN110133361A (en) | 2019-04-30 | 2019-04-30 | Power down alarm system based on low-voltage monitoring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114019418A (en) * | 2021-11-10 | 2022-02-08 | 南京能瑞自动化设备股份有限公司 | Power failure detection circuit for Internet of things electric energy meter and Internet of things electric energy meter |
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Application publication date: 20190816 |