CN207652022U - Fire-fighting equipment power output intelligent protection circuit - Google Patents
Fire-fighting equipment power output intelligent protection circuit Download PDFInfo
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- CN207652022U CN207652022U CN201721801105.2U CN201721801105U CN207652022U CN 207652022 U CN207652022 U CN 207652022U CN 201721801105 U CN201721801105 U CN 201721801105U CN 207652022 U CN207652022 U CN 207652022U
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- output
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- single chip
- fire
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Abstract
The utility model belongs to intelligent building field of engineering technology, more particularly to fire-fighting equipment power output intelligent protection circuit.Including current detecting and amplifying circuit, output control circuit, load and single chip control module, the current detecting is connected with amplifying circuit with single chip control module and output control circuit, the current detecting is with amplifying circuit for detecting output current in real time, and pass through amplifying circuit, current signal is converted into the voltage signal of amplification, the single chip control module detection output power is continued above certain threshold value, is cut off and is exported by output control circuit.The utility model monitors output loading power condition in real time, judges whether output equipment is normal, when output power exception, cuts off output loop in time, achieve the purpose that protection.
Description
Technical field
The utility model belongs to intelligent building field of engineering technology, the more particularly to intelligent protection of fire-fighting equipment power output
Circuit.
Background technology
In fire-fighting domain, it is severe that there is site environments, and complex circuit, output power, interference source is more, waits many not true
Determine factor.Therefore in equipment output end, protection circuit is particularly important.Existing fire-fighting equipment output protection circuit uses
Traditional short-circuit protection or hardware overload protecting circuit, there is following several respects deficiencies.One, conventional protection circuit only exists
In the case of load short circuits or overload, cut-out output has the function that protection；Two, when load is because of environmental factor（As circuit connects
Ground, line-hit）Etc. factors, cause load power consumption between short circuit overload between when, traditional protection circuit can not supervise in real time
It surveys, and plays the effect of protection.
Utility model content
In order to overcome the deficiencies of existing technologies, real time monitoring output loading power condition judges whether output equipment is normal,
When output power exception, output loop being cut off in time, achievees the purpose that protection, the utility model proposes fire-fighting equipment power
Export intelligent protection circuit.
Technical solutions of the utility model are as follows：
Fire-fighting equipment power output intelligent protection circuit, including current detecting and amplifying circuit, output control circuit, load
And single chip control module, the current detecting are connected with amplifying circuit with single chip control module and output control circuit,
The current detecting detects output current with amplifying circuit for real-time, and by amplifying circuit, current signal is converted into putting
Big voltage signal, the single chip control module detection output power is continued above certain threshold value, by exporting control electricity
Road cut-out output.
Preferably, the single chip control module obtains load threshold by reading device type.
The current detecting and amplifying circuit include resistance R1, and the one end the resistance R1 is connected with power supply and resistance R7,
The other end is grounded, and the other end of the resistance R7 is connected with the anode of diode D2, the cathode ground connection of the diode D2, institute
The anode for stating diode D2 shunt capacitances C4, the diode D2 is connected with the in-phase input end of operational amplifier, the fortune
The inverting input for calculating amplifier is grounded by resistance R11, and the output end of the operational amplifier is connect by resistance R10, R11
The output end on ground, the operational amplifier is connected with single chip control module.Resistance R10 forms feedback regulation with resistance R11
Circuit, for adjusting amplification factor；Resistance R7, capacitance C4 form input filter circuit；Diode D2, by voltage clamping in
0.7V prevents overtension, burns out amplifier；R8 current-limiting resistances of resistance, are connected to the ports ADC of microcontroller, prevent voltage mistake
Height burns out Chip Microcomputer A/D C.
Preferably, sampling resistor R1, using high-precision constantan wire material, for detecting output current.
Preferably, the in-phase input end of the operational amplifier is also connected with the pin 3 of double operational chip LM258
It connects, the inverting input of the operational amplifier is connected with the pin 2 of double operational chip LM258, the operational amplifier
Output end is also connected with the pin 1 of double operational chip LM258.Operational amplifier completes the amplification to electric current
Preferably, the output control circuit includes capacitance C2, the output end of the single chip control module passes through
Capacitance C2 ground connection, the output end of the single chip control module are connected with resistance R2, the other end and resistance of the resistance R2
R6 is connected with the base stage of triode Q1, the other end ground connection of the resistance R6, and the emitter ground connection of the triode Q1 is described
The collector of triode Q1 is connected with the anode of diode D1, and the cathode of the diode D1 is connected with relay K2, institute
It includes two contacts to state relay K2, and one of contact is disconnect switch, another contact passes through resistance R9 and light-emitting diodes
Pipe LED1 ground connection, the other end of the resistance R9 are connected with connector JJ1.Triode Q1, resistance R2, R6, capacitance C2 are formed
Relay drive circuit；Diode D1 is for eliminating relay direction electromotive force；Relay K2 be used for load output unlatching and
Cut-out；Resistance R9 is used to indicate current output situation with Light-emitting diode LED 1.
The utility model advantageous effect is：The utility model can monitor output power in real time, according to load equipment
Type and the required power maximum value of load equipment, dynamic adjust rotection thresholds.When detecting that output power is continued above threshold
When value, cut-out output achievees the effect that protection.Dynamic adjustment rotection thresholds, can prevent in output abnormality（Such as load faulty,
Line-to-ground etc.）, in the case of not reaching the load of fire-fighting equipment maximum output but, cut-out output reaches reduction energy consumption with this,
The effect of circuit and equipment is protected simultaneously.
Description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is Tthe utility model system block diagram.
Fig. 2 is the utility model current detecting and amplifying circuit.
Fig. 3 is the utility model output control circuit.
Fig. 4 is the utility model single chip control module flow chart.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings.
Refering to fig. 1 to Fig. 4.
Fire-fighting equipment power output intelligent protection circuit, including current detecting and amplifying circuit, output control circuit, load
And single chip control module, the current detecting are connected with amplifying circuit with single chip control module and output control circuit,
The current detecting detects output current with amplifying circuit for real-time, and by amplifying circuit, current signal is converted into putting
Big voltage signal, the single chip control module detection output power is continued above certain threshold value, by exporting control electricity
Road cut-out output.
As the utility model preferred embodiment, the single chip control module is loaded by reading device type
Threshold value.
As the utility model preferred embodiment, the current detecting and amplifying circuit include resistance R1, the resistance
The one end R1 is connected with power supply and resistance R7, and other end ground connection, the other end of the resistance R7 is connected with the anode of diode D2
It connects, the cathode ground connection of the diode D2, the diode D2 shunt capacitances C4, the anode and operation amplifier of the diode D2
The in-phase input end of device is connected, and the inverting input of the operational amplifier is grounded by resistance R11, the operational amplifier
Output end be grounded by resistance R10, R11, the output end of the operational amplifier is connected with single chip control module.
As the utility model preferred embodiment, the resistance R1 is made of high-precision constantan wire.
As the utility model preferred embodiment, the in-phase input end of the operational amplifier also with double operational chip
The pin 3 of LM258 is connected, and the inverting input of the operational amplifier is connected with the pin 2 of double operational chip LM258,
The output end of the operational amplifier is also connected with the pin 1 of double operational chip LM258.
As the utility model preferred embodiment, the output control circuit includes capacitance C2, the microcontroller control
The output end of module is grounded by capacitance C2, and the output end of the single chip control module is connected with resistance R2, the resistance
The other end of R2 is connected with the base stage of resistance R6 and triode Q1, the other end ground connection of the resistance R6, the triode Q1
Emitter ground connection, the collector of the triode Q1 is connected with the anode of diode D1, the cathode of the diode D1 and
Relay K2 is connected, and the relay K2 includes two contacts, and one of contact is disconnect switch, another contact passes through
Resistance R9 and Light-emitting diode LED 1 are grounded, and the other end of the resistance R9 is connected with connector JJ1.
The operation principle of the utility model circuit is：Sampling resistor R1 has used accurate constantan wire material, can detect back
High current in road, and precision is high, and fever is low, after the filter circuit formed by R7, D2, C4, is sent into the forward direction of amplifier
Input terminal.The output end of amplifier is sent into the reversed input of amplifier by the bleeder circuit of resistance R10 and R11 compositions after dividing
End forms negative-feedback input.By adjusting the resistance value ratio of R10 and R11, the amplification factor of electric current can be adjusted.
Output control circuit is using relay K2 as core, and triode Q1 and peripheral circuit do the driving of relay, by list
The I/O port control single chip computer control module flow chart of piece machine.After powering on booting, load threshold is first read, subsequently into following
Ring.In the circulating cycle, periodic reading loads actual value, and will load actual value and threshold value comparison.If load value is more than threshold value,
Continue to execute cycle.If load value is less than threshold value, output is closed.To reach the design object of protection equipment.
Above-mentioned accompanying drawings and embodiments are merely to illustrate the utility model, and any technical field those of ordinary skill is to it
The appropriate changes or modifications done, or use other flower pattern instead and make this technical change, it all should be regarded as not departing from this practicality newly
Type patent category.
Claims (6)
1. fire-fighting equipment power output intelligent protection circuit, it is characterised in that：It is controlled including current detecting and amplifying circuit, output
Circuit, load and single chip control module, the current detecting and amplifying circuit and single chip control module and output control electricity
Road is connected, and the current detecting detects output current with amplifying circuit for real-time, and by amplifying circuit, by current signal
It is converted into the voltage signal of amplification, the single chip control module detection output power is continued above certain threshold value, by defeated
Go out control circuit cut-out output.
2. fire-fighting equipment power output intelligent protection circuit according to claim 1, it is characterised in that：The microcontroller control
Molding block obtains load threshold by reading device type.
3. fire-fighting equipment power output intelligent protection circuit according to claim 2, it is characterised in that：The current detecting
Include resistance R1 with amplifying circuit, the one end the resistance R1 is connected with power supply and resistance R7, other end ground connection, the resistance
The other end of R7 is connected with the anode of diode D2, the cathode ground connection of the diode D2, the diode D2 shunt capacitances
The anode of C4, the diode D2 are connected with the in-phase input end of operational amplifier, the anti-phase input of the operational amplifier
End is grounded by resistance R11, and the output end of the operational amplifier is grounded by resistance R10, R11, the operational amplifier
Output end is connected with single chip control module.
4. fire-fighting equipment power output intelligent protection circuit according to claim 3, it is characterised in that：The resistance R1 by
High-precision constantan wire is made.
5. fire-fighting equipment power output intelligent protection circuit according to claim 4, it is characterised in that：The operation amplifier
The in-phase input end of device is also connected with the pin 3 of double operational chip LM258, the inverting input of the operational amplifier with it is double
The pin 2 of amplifier chip LM258 is connected, the output end of the operational amplifier also with 1 phase of pin of double operational chip LM258
Connection.
6. fire-fighting equipment power output intelligent protection circuit according to claim 5, it is characterised in that：The output control
Circuit includes capacitance C2, and the output end of the single chip control module is grounded by capacitance C2, the single chip control module
Output end is connected with resistance R2, and the other end of the resistance R2 is connected with the base stage of resistance R6 and triode Q1, the electricity
The other end ground connection of R6 is hindered, the emitter ground connection of the triode Q1, the collector and diode D1 of the triode Q1 are just
Pole is connected, and the cathode of the diode D1 is connected with relay K2, and the relay K2 includes two contacts, one of them
Contact is disconnect switch, another contact is grounded by resistance R9 and Light-emitting diode LED 1, the other end of the resistance R9 with
Connector JJ1 is connected.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720266882 | 2017-03-20 | ||
| CN2017202668825 | 2017-03-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207652022U true CN207652022U (en) | 2018-07-24 |
Family
ID=62878120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721801105.2U Active CN207652022U (en) | 2017-03-20 | 2017-12-21 | Fire-fighting equipment power output intelligent protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207652022U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111327976A (en) * | 2020-03-27 | 2020-06-23 | 国网河南省电力公司信息通信公司 | Optical fiber communication network protection circuit |
| CN112666378A (en) * | 2020-12-31 | 2021-04-16 | 深圳市云鼠科技开发有限公司 | Current detection amplifying circuit |
-
2017
- 2017-12-21 CN CN201721801105.2U patent/CN207652022U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111327976A (en) * | 2020-03-27 | 2020-06-23 | 国网河南省电力公司信息通信公司 | Optical fiber communication network protection circuit |
| CN111327976B (en) * | 2020-03-27 | 2021-10-15 | 国网河南省电力公司信息通信公司 | Optical fiber communication network protection circuit |
| CN112666378A (en) * | 2020-12-31 | 2021-04-16 | 深圳市云鼠科技开发有限公司 | Current detection amplifying circuit |
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