CN107728082A - A kind of AC220V voltage detecting circuits for fire-fighting equipment power supply - Google Patents
A kind of AC220V voltage detecting circuits for fire-fighting equipment power supply Download PDFInfo
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- CN107728082A CN107728082A CN201711089921.XA CN201711089921A CN107728082A CN 107728082 A CN107728082 A CN 107728082A CN 201711089921 A CN201711089921 A CN 201711089921A CN 107728082 A CN107728082 A CN 107728082A
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- 239000003381 stabilizer Substances 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000005611 electricity Effects 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
-
- 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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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
A kind of AC220V voltage detecting circuits for fire-fighting equipment power supply, including MCU, the detection circuit includes rectifier bridge BD1, rectifier bridge BD1 inputs connect AC220V to be detected voltage, the both ends of rectifier bridge BD1 outputs are respectively by current-limiting resistance connection voltage-stabiliser tube ZD1 and voltage-stabiliser tube ZD2, wherein rectifier bridge BD1 output cathodes pass through resistance R1 connection voltage-stabiliser tubes ZD1 negative pole, rectifier bridge BD1 output negative poles pass through resistance R3 connection voltage-stabiliser tubes ZD2 positive pole, voltage-stabiliser tube ZD1 positive pole passes through resistance R2 connection optocouplers U1 input anode, voltage-stabiliser tube ZD2 negative pole passes through resistance R4 connection optocouplers U1 input cathode, the colelctor electrode connection MCU of optocoupler U1 output ends IO input pins, the grounded emitter of optocoupler U1 output ends.
Description
Technical field
The invention belongs to fire-fighting equipment technical field, more particularly to a kind of AC220V voltages for fire-fighting equipment power supply are examined
Slowdown monitoring circuit.
Background technology
In existing standard GB/T 28184-2011《Fire-fighting equipment power supply monitoring system》In, it is related to AC network
When voltage and standby electric switching control, there is following regulation：
4.2.1.3 monitor power supply should set main power source and stand-by power supply.When AC network supply voltage amplitude of fluctuation is in volume
In the range of determine voltage 220V 85%~110%, monitor should be able to normal work.
4.2.1.4 the power unit of monitor should have main power source and stand-by power supply translation function.When the main power source is off,
Stand-by power supply can be automatically switched to；When main power source recovers, main power source can be automatically switched to；The conversion of active and standby power supply should not influence
The normal work of monitor.
It can be seen that by Standard, during fire-fighting equipment power work, not less than the 85% of voltage 220V, i.e., >=187V when,
Automatically switch to main electricity work.In practice, fire equipments power supply is arranged to：175V-185V is switched to main electrician
Make ,≤175V is switched to standby electricity work.
Fire-fighting equipment power supply 220V voltage detecting is MCU detection 100-280V actual voltage values, when meeting GB 28184-
2011 when requiring, active and standby power supply must be changed.
Fire-fighting equipment power supply 220V voltage detectings, generally use low-frequency transformer detection circuit, low-frequency transformer detection electricity
The Cleaning Principle on road is to be changed according to AC220V transformer output voltage with input voltage and change and realize.
Fig. 1 is existing AC220V voltage detecting circuits schematic diagram, AC220V voltages, is exported through transformer T1 transformations, output
Voltage is through BD1 rectifications, after electrochemical capacitor C1 filtering, the IO input pins through resistance R1 bufferings into MCU, carries out voltage calculating,
MCU controls active and standby electric conversion circuit according to T1 output voltages height.Because of electrochemical capacitor C1 energy storage, prevent output voltage from fast
Speed follows the change of input 220V voltages, makes active and standby electric switching hysteresis, and then make monitor cisco unity malfunction sometimes.Because becoming
Depressor output error is larger so that MCU detection voltage errors are also larger, and in 175V-185V, fire-fighting equipment power supply should be switched to
Main electricity work, but partial power is just switched to main electricity work in ＞ 187V.Such case causes fire-fighting equipment power supply product one
Cause property is deteriorated, or even some does not reach Standard.In addition, because low-frequency transformer uses silicon steel sheet and copper cash, cost is also higher
It is high.
The content of the invention
The present invention provides a kind of AC220V voltage detecting circuits for fire-fighting equipment power supply, to solve existing low frequency
Transformer detection electric circuit inspection precision it is not high, it is unstable the problem of.
A kind of AC220V voltage detecting circuits for fire-fighting equipment power supply, including MCU, the detection circuit include rectifier bridge
BD1, rectifier bridge BD1 input connect AC220V to be detected voltage,
The both ends of rectifier bridge BD1 outputs are respectively by current-limiting resistance connection voltage-stabiliser tube ZD1 and voltage-stabiliser tube ZD2, wherein rectification
Bridge BD1 output cathodes pass through resistance R1 connection voltage-stabiliser tubes ZD1 negative pole, and rectifier bridge BD1 output negative poles are steady by resistance R3 connections
Pressure pipe ZD2 positive pole,
Voltage-stabiliser tube ZD1 positive pole passes through resistance R2 connection optocouplers U1 input anode, and voltage-stabiliser tube ZD2 negative pole is by electricity
R4 connection optocouplers U1 input cathode is hindered,
The colelctor electrode connection MCU of optocoupler U1 output ends IO input pins, the grounded emitter of optocoupler U1 output ends.
Further, MCU IO output pins connect active and standby power conversion circuit, the active and standby electricity conversion electricity of main power source 24V accesses
Road, 24V battery packs access active and standby power conversion circuit.
The high pressure pulsewidth AC220V detection circuits of the present invention, the width of optocoupler U1 output 5V square waves is make use of with input 220V
The characteristics of voltage change, measures to 220V voltages, and detection voltage range is wide, and measurement voltage is accurate；Component used is few, can
220V detecting element costs are greatly lowered, reliability is high；Because being increased using optocoupler, insulating properties compared with transformer.
Brief description of the drawings
Detailed description below, above-mentioned and other mesh of exemplary embodiment of the invention are read by reference to accompanying drawing
, feature and advantage will become prone to understand.In the accompanying drawings, if showing the present invention's by way of example, and not by way of limitation
Dry embodiment, wherein：
Fig. 1 is existing AC220V low-frequency transformers voltage detecting circuit schematic diagram.
Fig. 2 is the AC220V high pressure pulsewidth AC220V voltage detecting circuit schematic diagrams of the present invention.
Embodiment
As shown in Fig. 2 the high pressure pulsewidth AC220V for fire-fighting equipment power supply of the present invention detects circuit, including MCU, should
Detection circuit includes rectifier bridge BD1, and rectifier bridge BD1 inputs connect AC220V to be detected voltage.The two of rectifier bridge BD1 outputs
End connects by current-limiting resistance connection voltage-stabiliser tube ZD1 and voltage-stabiliser tube ZD2, wherein rectifier bridge BD1 output cathodes by resistance R1 respectively
Voltage-stabiliser tube ZD1 negative pole is connect, rectifier bridge BD1 output negative poles pass through resistance R3 connection voltage-stabiliser tubes ZD2 positive pole.Voltage-stabiliser tube ZD1's
Positive pole passes through resistance R2 connection optocouplers U1 input anode, and voltage-stabiliser tube ZD2 negative pole is by the defeated of resistance R4 connection optocouplers U1
Enter to hold negative pole.The colelctor electrode connection MCU of optocoupler U1 output ends IO input pins, the grounded emitter of optocoupler U1 output ends.MCU
IO output pins connect active and standby power conversion circuit, main power source 24V accesses active and standby power conversion circuit, and the access of 24V battery packs is active and standby
Power conversion circuit.
Wherein, the parameter of device includes,
Rectifier bridge BD1,0.5A, 600V；Resistance R1, R2, R3, R4, R5, it is 4.7K Ω -20K Ω；Voltage-stabiliser tube ZD1,
ZD2, it is 50V-75V, 0.5W；Optocoupler U1, EL817.
220V is carried out rectification by rectifier bridge BD1, is 100Hz half-sine waves after rectification, trough is to peak voltage scope
0-350V, because of voltage-stabiliser tube ZD1, ZD2 voltage chopping adds R1, R2, R3, the current limliting of R4 resistance, makes the 120- of 100Hz half-sine waves
350V parts just can turn on optocoupler U1.Resistance R5 upper ends connect 5V, and lower end connects the colelctor electrode of optocoupler U1 output ends, optocoupler U1
The grounded emitter of output end, 5V square waves are exported in the colelctor electrode of optocoupler U1 output ends, the IO input pins into MCU detect.
The width of optocoupler U1 colelctor electrodes output 5V square waves is with input 220V voltage changes.There is data below through actual test：
During AC150V, 5V square wave pulse widths are 8.5ms；
During AC180V, 5V square wave pulse widths are 7.8ms；
During AC220V, 5V square wave pulse widths are 6.4ms；
During AC250V, 5V square wave pulse widths are 5.2ms；
During AC280V, 5V square wave pulse widths are 4.3ms.
When main electric AC220V work, when MCU detects 5V square wave pulse width ＜ 7.8ms, active and standby power conversion circuit is transformed into
Main electricity output.When main electric AC220V disconnects, or during ＜ AC180V, when MCU detects 5V square wave pulse widths >=7.8ms, active and standby electricity
Change-over circuit is automatically switched to standby electricity output.
State's net frequency of supply is 50Hz, and the 100Hz half-sine waves cycle is 10ms after rectification, is detected through high pressure pulsewidth AC220V
After circuit, the 5V square wave pulse widths for being input to MCU are stabilization time, and MCU can accurately calculate input according to stable pulse width time
Voltage, because high pressure pulsewidth AC220V detection electric circuit inspection 220V magnitudes of voltage are accurate, in main electric AC220V disconnections or ＜ AC180V,
Quickly (＜ 10ms) standby electricity output can be transformed into；In main electricity >=AC180V, quickly (＜ 10ms) main electricity output can be transformed into.Can
Fully meet Standard.
What deserves to be explained is although foregoing teachings describe the essence of the invention by reference to some embodiments
God and principle, it should be appreciated that, the present invention is not limited to disclosed embodiment, the also unawareness of the division to each side
The feature that taste in these aspects can not combine, and this division is merely to the convenience of statement.It is contemplated that cover appended power
Included various modifications and equivalent arrangements in the spirit and scope that profit requires.
Claims (2)
1. a kind of AC220V voltage detecting circuits for fire-fighting equipment power supply, including MCU, it is characterised in that the detection circuit
Including rectifier bridge BD1, rectifier bridge BD1 inputs connect AC220V to be detected voltage,
The both ends of rectifier bridge BD1 outputs are respectively by current-limiting resistance connection voltage-stabiliser tube ZD1 and voltage-stabiliser tube ZD2, wherein rectifier bridge BD1
Output cathode passes through resistance R1 connection voltage-stabiliser tubes ZD1 negative pole, and rectifier bridge BD1 output negative poles pass through resistance R3 connection voltage-stabiliser tubes
ZD2 positive pole,
Voltage-stabiliser tube ZD1 positive pole passes through resistance R2 connection optocouplers U1 input anode, and voltage-stabiliser tube ZD2 negative pole passes through resistance R4
Optocoupler U1 input cathode is connected,
The colelctor electrode connection MCU of optocoupler U1 output ends IO input pins, the grounded emitter of optocoupler U1 output ends.
2. it is used for the AC220V voltage detecting circuits of fire-fighting equipment power supply as claimed in claim 1, it is characterised in that MCU's
IO output pins connect active and standby power conversion circuit, and main power source 24V accesses active and standby power conversion circuit, and 24V battery packs access active and standby electricity
Change-over circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711089921.XA CN107728082B (en) | 2017-11-08 | 2017-11-08 | AC220V voltage detection circuit for fire-fighting equipment power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711089921.XA CN107728082B (en) | 2017-11-08 | 2017-11-08 | AC220V voltage detection circuit for fire-fighting equipment power supply |
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| Publication Number | Publication Date |
|---|---|
| CN107728082A true CN107728082A (en) | 2018-02-23 |
| CN107728082B CN107728082B (en) | 2023-12-29 |
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| CN201711089921.XA Active CN107728082B (en) | 2017-11-08 | 2017-11-08 | AC220V voltage detection circuit for fire-fighting equipment power supply |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2735416Y (en) * | 2004-08-28 | 2005-10-19 | 周熙文 | Energy-saving type exactitude purifying AC voltage-stabilized power supply |
| CN101226212A (en) * | 2008-02-02 | 2008-07-23 | 华为技术有限公司 | Voltage testing circuit |
| CN202234833U (en) * | 2011-09-13 | 2012-05-30 | 九阳股份有限公司 | Soybean milk making circuit with voltage detecting function for soybean milk maker |
| CN202234828U (en) * | 2011-08-23 | 2012-05-30 | 九阳股份有限公司 | Pulping circuit with voltage detection function for soybean milk maker |
| CN207396699U (en) * | 2017-11-08 | 2018-05-22 | 柏宜照明（上海）股份有限公司 | A kind of AC220V voltage detecting circuits for fire-fighting equipment power supply |
-
2017
- 2017-11-08 CN CN201711089921.XA patent/CN107728082B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2735416Y (en) * | 2004-08-28 | 2005-10-19 | 周熙文 | Energy-saving type exactitude purifying AC voltage-stabilized power supply |
| CN101226212A (en) * | 2008-02-02 | 2008-07-23 | 华为技术有限公司 | Voltage testing circuit |
| CN202234828U (en) * | 2011-08-23 | 2012-05-30 | 九阳股份有限公司 | Pulping circuit with voltage detection function for soybean milk maker |
| CN202234833U (en) * | 2011-09-13 | 2012-05-30 | 九阳股份有限公司 | Soybean milk making circuit with voltage detecting function for soybean milk maker |
| CN207396699U (en) * | 2017-11-08 | 2018-05-22 | 柏宜照明（上海）股份有限公司 | A kind of AC220V voltage detecting circuits for fire-fighting equipment power supply |
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| Publication number | Publication date |
|---|---|
| CN107728082B (en) | 2023-12-29 |
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