CN110161450A - A kind of power-fail detection circuit, communication module and ammeter - Google Patents
A kind of power-fail detection circuit, communication module and ammeter Download PDFInfo
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- CN110161450A CN110161450A CN201910535857.6A CN201910535857A CN110161450A CN 110161450 A CN110161450 A CN 110161450A CN 201910535857 A CN201910535857 A CN 201910535857A CN 110161450 A CN110161450 A CN 110161450A
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- 238000004891 communication Methods 0.000 title claims abstract description 151
- 238000001514 detection method Methods 0.000 title claims abstract description 76
- 238000012545 processing Methods 0.000 claims abstract description 89
- 238000012544 monitoring process Methods 0.000 claims abstract description 74
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
- G01R22/063—Details of electronic electricity meters related to remote communication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
The present invention provides a kind of power-fail detection circuit, communication module and ammeter, is related to ammeter detection technique field.The ammeter includes base table and communication module, communication module and the pluggable connection of base table, communication module includes power-fail detection circuit, and power-fail detection circuit includes processing unit and monitoring unit, with the pluggable connection of base table, processing unit is also electrically connected with monitoring unit for processing unit and monitoring unit；The voltage signal that monitoring unit is used to be transmitted according to base table obtains detection signal, and sends detection signal to processing unit；Processing unit is for detecting whether communication module is plugged in the base table, if communication module is plugged in base table, judges whether base table has a power failure according to detection signal；If communication module is not plugged in base table, stop judging whether base table has a power failure.When can not power off to avoid ammeter by power-fail detection circuit, after communication module is extracted from base table, there is the power failure reported event of mistake.
Description
Technical field
The present invention relates to ammeter detection technique fields, in particular to a kind of power-fail detection circuit, communication module and electricity
Table.
Background technique
Existing ammeter when the power is not cut off, if pulling out wireless communication module, it may appear that the power failure reported event of mistake so that
Staff obtains the outage information of mistake, and then appearance the phenomenon that judge by accident, lead to wasting manpower and material resources.
Summary of the invention
Problems solved by the invention be ammeter when the power is not cut off, pull out wireless communication module, occur mistake power failure report
Event.
To solve the above problems, the technical scheme of the present invention is realized as follows:
In a first aspect, the present invention provides a kind of power-fail detection circuit, it is applied to communication module, the base of communication module and ammeter
The pluggable connection of table, power-fail detection circuit include processing unit and monitoring unit, and processing unit and monitoring unit can with base table
Plug connection, processing unit are also electrically connected with monitoring unit；Monitoring unit according to the voltage signal that base table transmits for being examined
Signal is surveyed, and sends detection signal to processing unit；Processing unit is used to detect whether communication module is plugged in the base table, if
Communication module is plugged in base table, then judges whether base table has a power failure according to detection signal；If communication module is not plugged in base table, stop
Only judge whether base table has a power failure.Compared with prior art, the application may determine that through the processing unit communication module whether grafting
In base table, when communication module is not plugged in base table, processing unit does not judge whether base table has a power failure, and then can be with
When ammeter being avoided not power off, after communication module is extracted from base table, there is the power failure reported event of mistake.
Further, processing unit includes processing chip and partial pressure subelement, and processing chip includes the first pin and second
Pin, the first pin are electrically connected by partial pressure subelement and the pluggable connection of base table, second pin with monitoring unit；Second pin
Signal is detected for receiving；It handles chip to be used for when the first pin receives the first signal of communication, judges communication module grafting
Judge whether base table has a power failure in base table, and according to detection signal；When the first pin receives the second signal of communication, judge to communicate
Module is not plugged in base table, and stops judging whether base table has a power failure.As it can be seen that processing chip is according to its received communication of the first pin
Signal judges whether communication module is plugged in base table, when judging that communication module is not plugged in base table, handles chip
When will not judge whether base table has a power failure, and then can not be powered off to avoid ammeter, after communication module is extracted from base table,
There is the power failure reported event of mistake.
Further, partial pressure subelement includes first resistor and second resistance, and one end of first resistor and base table can plugs
Connection, the other end of first resistor is electrically connected with one end of second resistance and the first pin, the other end of second resistance and logical
Believe the power electric connection of module.
Further, monitoring unit includes monitoring chip and switching tube, and monitoring chip includes input terminal and output end, switch
Pipe includes that first switch foot, second switch foot and third switch foot, input terminal and the pluggable connection of base table, and output end is opened with first
Foot electrical connection is closed, second switch foot is electrically connected with processing unit and the power supply of communication module, and third switchs foot ground connection.
Further, monitoring unit further includes 3rd resistor and the 4th resistance, and one end of 3rd resistor and base table are pluggable
Connection, the other end of 3rd resistor are electrically connected with one end of the 4th resistance and input terminal, the other end ground connection of the 4th resistance.It is logical
It crosses 3rd resistor and the 4th resistance and partial pressure is realized to the voltage signal of base table, so that the input terminal of monitoring chip receives lower electricity
Signal is pressed, prevents excessively high voltage signal from damaging to monitoring chip.
Further, monitoring unit further includes the 5th resistance and the 6th resistance, one end of the 5th resistance with it is described defeated
Outlet, the 6th resistance one end be electrically connected, the other end of the 5th resistance is electrically connected with the first switch foot, institute
State the other end ground connection of the 6th resistance.The output end of monitoring chip can be limited to switching tube by the 5th resistance and the 6th resistance
The transmission of first switch foot size of current, and then can prevent switching tube from damaging.
Further, monitoring unit further includes the 7th resistance, one end of the 7th resistance and the power electric connection of communication module,
The other end of 7th resistance is electrically connected with second switch foot and processing unit.Communication module can be limited by the 7th resistance
The size of current that power supply is transmitted to switching tube and processing unit, and then the damage of switching tube and processing unit can be prevented.
Further, communication module includes first interface, and base table includes second interface, communication module by first interface and
Second interface and the pluggable connection of base table, first interface are also electrically connected with processing unit and monitoring unit.
Further, first interface includes third pin, the 4th pin, the 5th pin and the 6th pin, second interface packet
The 7th pin, the 8th pin, the 9th pin and the tenth pin are included, third pin is electrically connected with the 4th pin and monitoring unit,
6th pin is electrically connected with processing unit, the 7th pin and the electrical connection of the 8th pin, the 9th pin and the electrical connection of the tenth pin；The
Three pins and the 7th pin electrical connection when communication module is plugged in base table, the company of disconnection when communication module is not plugged in base table
It connects；5th pin and the 9th pin electrical connection when communication module is plugged in base table are broken when communication module is not plugged in base table
Open connection；6th pin and the tenth pin electrical connection when communication module is plugged in base table are not plugged in base table in communication module
When disconnect.
Second aspect, the present invention provide a kind of communication module, and the pluggable connection of the base table of communication module and ammeter communicates mould
Block includes power-fail detection circuit, and power-fail detection circuit includes processing unit and monitoring unit, processing unit and monitoring unit with
The pluggable connection of base table, processing unit are also electrically connected with monitoring unit；Monitoring unit is used for the voltage signal transmitted according to base table
Detection signal is obtained, and sends detection signal to processing unit；Processing unit for detect communication module whether be plugged in it is described
Base table judges whether base table has a power failure according to detection signal if communication module is plugged in base table；If communication module is not plugged in base
Table then stops judging whether base table has a power failure.Compared with prior art, the application may determine that communication module is through the processing unit
No to be plugged in base table, when communication module is not plugged in base table, processing unit does not judge whether base table has a power failure, into
And when can not be powered off to avoid ammeter, after communication module is extracted from base table, there is the power failure reported event of mistake.
The third aspect, the present invention provide a kind of ammeter, including base table and communication module, communication module and the pluggable company of base table
It connects, communication module includes power-fail detection circuit, and power-fail detection circuit includes processing unit and monitoring unit, processing unit and monitoring
With the pluggable connection of base table, processing unit is also electrically connected with monitoring unit unit；What monitoring unit was used to be transmitted according to base table
Voltage signal obtains detection signal, and sends detection signal to processing unit；Processing unit is for detecting whether communication module inserts
It is connected to the base table, if communication module is plugged in base table, judges whether base table has a power failure according to detection signal；If communication module is not
It is plugged in base table, then stops judging whether base table has a power failure.Compared with prior art, the application may determine that logical through the processing unit
Letter module whether be plugged in base table, when communication module is not plugged in base table, processing unit not to base table whether have a power failure into
When going and judge, and then can not power off to avoid ammeter, after communication module is extracted from base table, the power failure for mistake occur reports thing
Part.
Detailed description of the invention
Fig. 1 is the structural block diagram of ammeter provided in an embodiment of the present invention；
Fig. 2 is the structural block diagram of power-fail detection circuit provided in an embodiment of the present invention；
Fig. 3 is the circuit diagram of power-fail detection circuit provided in an embodiment of the present invention；
Fig. 4 is the structural block diagram of communication module provided in an embodiment of the present invention；
Fig. 5 is the circuit diagram of communication module provided in an embodiment of the present invention.
Description of symbols:
1- ammeter；10- base table；11- second interface；20- communication module；21- power-fail detection circuit；211- processing unit；
2111- divides subelement；212- monitoring unit；22- first interface；23- power supply；30- remote terminal；N1- handles chip；N2-
Monitor chip；Q1- switching tube；R1- first resistor；R2- second resistance；R3- 3rd resistor；The 4th resistance of R4-；The 5th electricity of R5-
Resistance；The 6th resistance of R6-；The 7th resistance of R7-.
Specific embodiment
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
Fig. 1 is please referred to, is the structural block diagram of ammeter 1 provided in an embodiment of the present invention.Ammeter 1 includes base table 10 and communication mould
Block 20, communication module 20 and the pluggable connection of base table 10, communication module 20 are also communicated to connect with remote terminal 30.Base table 10 is used for
The power information of acquisition is transmitted to remote terminal 30 by communication module 20.Communication module 20 is for detecting whether base table 10 stops
Electricity obtains outage information or non-outage information, and outage information or non-outage information is transmitted to remote terminal 30.
It referring to figure 2., is the structural block diagram of the power-fail detection circuit 21 of communication module 20 shown in FIG. 1.Detection of power loss electricity
Road 21 includes processing unit 211 and monitoring unit 212, processing unit 211 and monitoring unit 212 with the pluggable company of base table 10
It connects, processing unit 211 is also electrically connected with monitoring unit 212.
In the present embodiment, the voltage signal that monitoring unit 212 is used to be transmitted according to base table 10, which obtains, detects signal, and to
Processing unit 211 sends detection signal；Processing unit 211 is for detecting whether communication module 20 is plugged in base table 10, if communication
Module 20 is plugged in base table 10, then judges whether base table 10 has a power failure according to detection signal；If communication module 20 is not plugged in base table
10, then stop judging whether base table 10 has a power failure.
As it can be seen that 211 may determine that whether communication module 20 is plugged in base table 10 through the processing unit, communication module 20 not
When being plugged in base table 10, processing unit 211 does not judge whether base table 10 has a power failure, and then can be to avoid ammeter 1 not
When power-off, after communication module 20 is extracted from base table 10, there is the power failure reported event of mistake.
It referring to figure 3., is the circuit diagram of power-fail detection circuit 21 shown in Fig. 2, processing unit 211 includes processing core
Piece N1 and partial pressure subelement 2111, processing chip N1 include the first pin and second pin, and the first pin passes through partial pressure subelement
2111 are electrically connected with the pluggable connection of base table 10, second pin with monitoring unit 212.
In the present embodiment, second pin is for receiving detection signal；Processing chip N1 in the first pin for receiving
When the first signal of communication, judge that communication module 20 is plugged in base table 10, and judge whether base table 10 has a power failure according to detection signal；?
When first pin receives the second signal of communication, judge that communication module 20 is not plugged in base table 10, and stops judging that base table 10 is
No power failure.
It is appreciated that first pin can receive the first signal of communication when communication module 20 is plugged in base table 10, processing
Chip N1 can judge when detecting that the first pin receives the first signal of communication according to the received detection signal of second pin
Whether base table 10 has a power failure, and outage information or non-outage information are sent to remote terminal 30.It is not plugged in communication module 20
When base table 10, the first pin can receive the second signal of communication, and processing chip N1 is detecting that it is logical that the first pin receives second
When believing signal, it will not judge whether base table 10 has a power failure according to the received detection signal of second pin, and then power failure will not be generated
Information or non-outage information.
In the present embodiment, processing chip N1 can use wireless communication chips.
Further, partial pressure subelement 2111 include first resistor R1 and second resistance R2, one end of first resistor R1 with
Base table 10 can plug connection, the other end of first resistor R1 is electrically connected with one end of second resistance R2 and the first pin, second
The other end of resistance R2 is electrically connected with the power supply 23 of communication module 20.
In the present embodiment, the resistance value of first resistor R1 is greater than the resistance value of second resistance R2, when communication module 20 is plugged in
When base table 10, one end of first resistor R1 and being electrically connected to ground for base table 10, then the first pin will receive low level signal
(i.e. the first signal of communication).When communication module 20 is not plugged in base table 10, one end of first resistor R1 and the ground wire of base table 10
It disconnects, since the other end of second resistance R2 is electrically connected with the power supply 23 of communication module 20, so the first pin will receive
To high level signal (i.e. the second signal of communication).
Further, in the present embodiment, monitoring unit 212 includes monitoring chip N2 and switching tube Q1, monitors chip N2
Including input terminal and output end, switching tube Q1 includes first switch foot, second switch foot and third switch foot, input terminal and base table
10 pluggable connections, output end are electrically connected with first switch foot, the electricity of second switch foot and processing unit 211 and communication module 20
Source 23 is electrically connected, and third switchs foot ground connection.
It is appreciated that detection signal includes first detection signal and the second detection signal, when the input terminal of monitoring chip N2
When the voltage signal for receiving the transmission of base table 10 is low level (for example, 0V), the output end of monitoring chip N2 can corresponding output
It for the control signal of low level (for example, 0V), and will be the first switch foot that low level control signal is transmitted to switching tube Q1,
Switching tube Q1 is when first switch foot receives as low level control signal, second switch foot and the third switch of switching tube Q1
It is in an off state between foot, since the second switch foot of switching tube Q1 is electrically connected with the power supply 23 of communication module 20, then locating
Reason unit 211 is received as the first detection signal of high level (for example, 5V).When the input terminal of monitoring chip N2 receives base table 10
When the voltage signal of transmission is high level (for example, 5V), it is high level (example that the output end for monitoring chip N2, which corresponding can export,
Such as, 5V) control signal, and the control signal for high level is transmitted to the first switch foot of switching tube Q1, switching tube Q1 exists
When the control signal that first switch foot receives as high level, it is between second switch foot and third the switch foot of switching tube Q1
On state, due to the third switch foot ground connection of switching tube Q1, then the second switch foot of switching tube Q1 can be pulled low as low electricity
It is flat, then processing unit 211 is received as the second detection signal of low level (for example, 0V).
In the present embodiment, when communication module 20 is plugged in base table 10, the input terminal and base table 10 of chip N2 are monitored
Power supply unit electrical connection.When communication module 20 is not plugged in base table 10, the power supply of the input terminal and base table 10 of chip N2 is monitored
Unit disconnects.So monitoring the input terminal of chip N2 when base table 10 has a power failure or communication module 20 is extracted from base table 10
The voltage signal for receiving the transmission of base table 10 is low level.When the normal work of base table 10 does not have a power failure and communication module 20 is plugged in
When base table 10, the voltage signal that the input terminal of monitoring chip N2 receives the transmission of base table 10 is high level.
In the present embodiment, monitoring chip N2 specifically can use model using detection of power loss chip
The detection of power loss chip of IMP809MEURT.
In the present embodiment, switching tube Q1 can use triode.When switching tube Q1 is triode, the of switching tube Q1
One switch foot is equivalent to the base stage of triode, and the second switch foot of switching tube Q1 is equivalent to the collector of triode, switching tube Q1
Third switch foot be equivalent to the emitter of triode.
Further, in the present embodiment, monitoring unit 212 further includes 3rd resistor R3 and the 4th resistance R4, third electricity
One end and the pluggable connection of base table 10 of R3 are hindered, the other end of 3rd resistor R3 and one end of the 4th resistance R4 and input terminal are electric
Connection, the other end ground connection of the 4th resistance R4.
It is appreciated that partial pressure is realized by voltage signal of the 3rd resistor R3 and the 4th resistance R4 to base table 10, so that prison
The input terminal for surveying chip N2 receives lower voltage signal.It can prevent excessively high voltage signal from causing to damage to monitoring chip N2
It is bad.
Further, in the present embodiment, monitoring unit 212 further includes the 5th resistance R5 and the 6th resistance R6, and described
One end of five resistance R5 is electrically connected with one end of the output end, the 6th resistance R6, and the 5th resistance R5's is another
End is electrically connected with the first switch foot, the other end ground connection of the 6th resistance R6.
It is appreciated that the output end of monitoring chip N2 can be limited to switching tube by the 5th resistance R5 and the 6th resistance R6
The size of current of the first switch foot transmission of Q1, and then can prevent switching tube Q1 from damaging.
Further, in the present embodiment, monitoring unit 212 further includes the 7th resistance R7, one end of the 7th resistance R7 with
The power supply 23 of communication module 20 is electrically connected, and the other end of the 7th resistance R7 is electrically connected with second switch foot and processing unit 211.
It is appreciated that the power supply 23 of communication module 20 can be limited to switching tube Q1 and processing unit by the 7th resistance R7
The size of current of 211 transmission, and then the damage of switching tube Q1 and processing unit 211 can be prevented.
As shown in figure 4, being the structural block diagram of communication module 20 provided in an embodiment of the present invention.Communication module 20 further includes
One interface 22, base table 10 include second interface 11, and communication module 20 can by first interface 22 and second interface 11 and base table 10
Plug connection, first interface 22 are also electrically connected with processing unit 211 and monitoring unit 212.
It is appreciated that processing unit 211 and monitoring unit 212 can be realized by first interface 22 and second interface 11 with
The pluggable connection of base table 10.
As shown in figure 5, being the circuit diagram of communication module 20 shown in Fig. 4.First interface 22 includes third pin
VCC1, the 4th pin VCC2, the 5th pin GND1 and the 6th pin DGND1, second interface 11 include the 7th pin VCC3, the 8th
Pin VCC4, the 9th pin GND2 and the tenth pin DGND2, third pin VCC1 and the 4th pin VCC2 and monitoring unit 212
It is electrically connected, the 6th pin DGND1 is electrically connected with processing unit 211, the 7th pin VCC3 and the 8th pin VCC4 electrical connection, the
Nine pin GND2 and the tenth pin DGND2 electrical connection.
Third pin VCC1 and the 7th pin VCC3 electrical connection when communication module 20 is plugged in base table 10, in communication module
20 disconnect when not being plugged in base table 10.
5th pin GND1 and the 9th pin GND2 electrical connection when communication module 20 is plugged in base table 10, in communication module
20 disconnect when not being plugged in base table 10.
6th pin DGND1 and the tenth pin DGND2 electrical connection when communication module 20 is plugged in base table 10, in communication mould
Block 20 disconnects when not being plugged in base table 10.
In the present embodiment, third pin VCC1 and the 4th pin VCC2 is with the monitoring chip N2's of monitoring unit 212
Input terminal electrical connection；6th pin DGND1 is drawn by dividing subelement 2111 with the first of the processing chip N1 of processing unit 211
Foot electrical connection, i.e. the 6th pin DGND1 are electrically connected by first resistor R1 with the first pin.
In the present embodiment, the 7th pin VCC3 and the 8th pin VCC4 of second interface 11 with the power supply list of base table 10
Member electrical connection, the 9th pin GND2 of second interface 11 and the tenth pin DGND2 are grounded.Wherein, it is worked normally in base table 10
When, i.e., base table 10 is in non-power failure, and power supply unit can provide work electricity to the 7th pin VCC3 and the 8th pin VCC4
Voltage signal at pressure, the 7th pin VCC3 and the 8th pin VCC4 is high level (for example, 5V).Power failure shape is in base table 10
When state, power supply unit is provided without operating voltage to the 7th pin VCC3 and the 8th pin VCC4, and the 7th pin VCC3 and the 8th draws
Voltage signal at foot VCC4 is 0V.
In the present embodiment, when communication module 20 is plugged in base table 10, third pin VCC1, the 4th pin VCC2,
It is electrically connected to each other between seven pin VCC3 and the 8th pin VCC4, the 5th pin GND1, the 6th pin DGND1, the 9th pin
It is electrically connected to each other between GND2 and the tenth pin DGND2.If base table 10 is in power failure, then third pin VCC1, the 4th
Voltage signal at pin VCC2, the 7th pin VCC3 and the 8th pin VCC4 is 0V, since the 5th pin GND1, the 6th draw
Foot DGND1, the 9th pin GND2 and the tenth pin DGND2 ground connection, the 5th pin GND1, the 6th pin DGND1, the 9th pin
Voltage signal at GND2 and the tenth pin DGND2 is low level.The first pin for so handling chip N1 can receive the
One signal of communication, the input terminal of monitoring chip N2 can receive as low level voltage signal, monitor chip N2 and can then control and hold
It closes pipe Q1 to be in an off state, the second pin of processing chip N1 can then receive first detection signal.Processing chip N1 is being examined
When measuring the first pin and receiving the first signal of communication, base table 10 can be judged according to the received first detection signal of second pin
10 power-off event of base table is reported in power failure, and to remote terminal 30.
If base table 10 works normally and base table 10 is not in power failure, then third pin VCC1, the 4th pin
Voltage signal at VCC2, the 7th pin VCC3 and the 8th pin VCC4 is high level, since the 5th pin GND1, the 6th draw
Foot DGND1, the 9th pin GND2 and the tenth pin DGND2 ground connection, the 5th pin GND1, the 6th pin DGND1, the 9th pin
Voltage signal at GND2 and the tenth pin DGND2 is also low level.The first pin for so handling chip N1 can receive
First signal of communication, the input terminal of monitoring chip N2 can receive the voltage signal for high level, and monitoring chip N2 can then be controlled
Switching tube Q1 is in the conductive state, and the second pin of processing chip N1 can then receive the second detection signal.Processing chip N1 exists
When detecting that the first pin receives the first signal of communication, base table can be judged according to the received second detection signal of second pin
10 are in non-power failure.
In the present embodiment, when communication module 20 is not plugged in base table 10, third pin VCC1 and the 4th pin VCC2
It is disconnected with the 7th pin VCC3 and the 8th pin VCC4, the 5th pin GND1 and the 9th pin GND2 and the tenth pin
DGND2 is disconnected, and the 6th pin DGND1 and the 9th pin GND2 and the tenth pin DGND2 are disconnected.At this point, no matter base
Table 10 is in power failure or non-power failure, third pin VCC1, the 4th pin VCC2, the 5th pin GND1, the 6th
Pin DGND1 is in vacant state, then third pin VCC1, the 4th pin VCC2, the 5th pin GND1, the 6th pin
Voltage signal at DGND1 is 0V.The first pin of processing chip N1 can receive the second signal of communication, monitoring chip N2's
Input terminal can receive as low level voltage signal, monitor chip N2 then can control switch pipe Q1 be in an off state, handle
The second pin of chip N1 can then receive first detection signal.Processing chip N1 is detecting that it is logical that the first pin receives second
When believing signal, it will not judge that base table 10 is in power failure according to the received first detection signal of second pin, it will not be to remote
Journey terminal 30 reports 10 power-off event of base table.That is, processing chip N1 will not be to inspection when receiving the second signal of communication
When surveying signal to be handled, and then avoiding ammeter 1 and do not power off, after pulling out communication module 20, the power failure for mistake occur reports thing
Part.
As it can be seen that processing chip N1 can judge whether communication module 20 is plugged in base table 10 according to signal of communication, and
When judging that communication module 20 is not plugged in base table 10, received detection signal will not be handled, i.e., it will not be to base table 10
Whether power failure is judged, and then when avoiding ammeter 1 and not powering off, after pulling out communication module 20, the power failure for mistake occur is reported
Event.
In conclusion power-fail detection circuit provided in an embodiment of the present invention, communication module and ammeter, which includes base table
And communication module, communication module and the pluggable connection of base table, communication module includes power-fail detection circuit, and power-fail detection circuit includes
Processing unit and monitoring unit, processing unit and monitoring unit with the pluggable connection of base table, processing unit also with monitoring unit
Electrical connection；The voltage signal that monitoring unit is used to be transmitted according to base table obtains detection signal, and sends detection letter to processing unit
Number；Processing unit is for detecting whether communication module is plugged in the base table, if communication module is plugged in base table, according to detection
Signal judges whether base table has a power failure；If communication module is not plugged in base table, stop judging whether base table has a power failure.With the prior art
It compares, the application may determine that whether communication module is plugged in base table through the processing unit, not be plugged in base table in communication module
When, processing unit does not judge whether base table has a power failure, and then when can not power off to avoid ammeter, by communication module from
After extracting on base table, there is the power failure reported event of mistake.
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (11)
1. a kind of power-fail detection circuit, which is characterized in that applied to communication module, the base table of the communication module and ammeter can be inserted
Pull out connection, the power-fail detection circuit includes processing unit and monitoring unit, the processing unit and the monitoring unit with
The pluggable connection of base table, the processing unit are also electrically connected with the monitoring unit；
The voltage signal that the monitoring unit is used to be transmitted according to the base table obtains detection signal, and sends out to the processing unit
Send the detection signal；
The processing unit is for detecting whether the communication module is plugged in the base table, if the communication module is plugged in institute
Base table is stated, then judges whether the base table has a power failure according to the detection signal；If the communication module is not plugged in the base table,
Then stop judging whether the base table has a power failure.
2. power-fail detection circuit as described in claim 1, which is characterized in that the processing unit includes processing chip and partial pressure
Subelement, the processing chip include the first pin and second pin, and first pin passes through the partial pressure subelement and institute
The pluggable connection of base table is stated, the second pin is electrically connected with the monitoring unit；
The second pin is for receiving the detection signal；
The processing chip is used for when first pin receives the first signal of communication, judges that the communication module is plugged in
The base table, and judge whether the base table has a power failure according to the detection signal；The second communication is received in first pin
When signal, judge that the communication module is not plugged in the base table, and stops judging whether the base table has a power failure.
3. power-fail detection circuit as claimed in claim 2, which is characterized in that the partial pressure subelement includes first resistor and
Two resistance, one end of the first resistor and the base table can plug connect, the other end of the first resistor and described second
One end of resistance and first pin are electrically connected, and the other end of the second resistance and the power supply of the communication module are electrically connected
It connects.
4. power-fail detection circuit as described in claim 1, which is characterized in that the monitoring unit includes monitoring chip and switch
Pipe, the monitoring chip includes input terminal and output end, and the switching tube includes that first switch foot, second switch foot and third are opened
Foot, the input terminal and the pluggable connection of the base table are closed, the output end is electrically connected with the first switch foot, and described second
Switch foot is electrically connected with the processing unit and the power supply of the communication module, the third switch foot ground connection.
5. power-fail detection circuit as claimed in claim 4, which is characterized in that the monitoring unit further includes 3rd resistor and
Four resistance, one end of the 3rd resistor and the pluggable connection of the base table, the other end of the 3rd resistor and the described 4th
One end of resistance and the input terminal are electrically connected, the other end ground connection of the 4th resistance.
6. power-fail detection circuit as claimed in claim 4, which is characterized in that the monitoring unit further includes the 5th resistance and
One end of six resistance, the 5th resistance is electrically connected with one end of the output end, the 6th resistance, the 5th resistance
The other end be electrically connected with the first switch foot, the other end of the 6th resistance ground connection.
7. power-fail detection circuit as claimed in claim 4, which is characterized in that the monitoring unit further includes the 7th resistance, institute
State one end of the 7th resistance and the power electric connection of the communication module, the other end and the second switch of the 7th resistance
Foot and the processing unit are electrically connected.
8. power-fail detection circuit as described in claim 1, which is characterized in that the communication module includes first interface, described
Base table includes second interface, and the communication module passes through the first interface and the second interface and the pluggable company of the base table
It connects, the first interface is also electrically connected with the processing unit and the monitoring unit.
9. power-fail detection circuit as claimed in claim 8, which is characterized in that the first interface includes third pin, the 4th
Pin, the 5th pin and the 6th pin, the second interface include the 7th pin, the 8th pin, the 9th pin and the tenth pin,
The third pin is electrically connected with the 4th pin and the monitoring unit, the 6th pin and processing unit electricity
Connection, the 7th pin and the 8th pin electrical connection, the 9th pin and the tenth pin electrical connection；
The third pin and the 7th pin electrical connection when the communication module is plugged in the base table, in the communication
Module disconnects when not being plugged in the base table；
5th pin and the 9th pin electrical connection when the communication module is plugged in the base table, in the communication
Module disconnects when not being plugged in the base table；
6th pin and the tenth pin electrical connection when the communication module is plugged in the base table, in the communication
Module disconnects when not being plugged in the base table.
10. a kind of communication module, which is characterized in that including power-fail detection circuit as described in any one of claims 1-9.
11. a kind of ammeter, which is characterized in that including base table and communication module, the communication module and the pluggable company of the base table
It connects, the communication module includes power-fail detection circuit as described in any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910535857.6A CN110161450A (en) | 2019-06-20 | 2019-06-20 | A kind of power-fail detection circuit, communication module and ammeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910535857.6A CN110161450A (en) | 2019-06-20 | 2019-06-20 | A kind of power-fail detection circuit, communication module and ammeter |
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| Publication Number | Publication Date |
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| CN110161450A true CN110161450A (en) | 2019-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910535857.6A Pending CN110161450A (en) | 2019-06-20 | 2019-06-20 | A kind of power-fail detection circuit, communication module and ammeter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113972733A (en) * | 2021-09-16 | 2022-01-25 | 国网浙江嵊州市供电有限公司 | Power acquisition terminal, power failure monitoring system and power failure monitoring method |
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