CN109193571A - Bus power source malfunction monitoring protects circuit - Google Patents
Bus power source malfunction monitoring protects circuit Download PDFInfo
- Publication number
- CN109193571A CN109193571A CN201811151272.6A CN201811151272A CN109193571A CN 109193571 A CN109193571 A CN 109193571A CN 201811151272 A CN201811151272 A CN 201811151272A CN 109193571 A CN109193571 A CN 109193571A
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- circuit
- power source
- bus power
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- 230000007257 malfunction Effects 0.000 title claims abstract description 21
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 239000000919 ceramic Substances 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000004891 communication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000012806 monitoring device Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1203—Circuits independent of the type of conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Protection Of Static Devices (AREA)
Abstract
The invention discloses a kind of bus power source malfunction monitorings to protect circuit, comprising: the bus power source that bus power source input circuit is used to input is exported after fault secure circuit to bus power source output circuit；Power-switching circuit is used for based on bus power source generation circuit operating voltage and circuit voltage is transmitted to MCU controller circuitry；Tension measuring circuit is used to detect the voltage value of the output end of fault secure circuit and voltage value is transmitted to MCU controller circuitry；Current measurement circuit is used to detect the current value of the output end of fault secure circuit and current value is transmitted to MCU controller circuitry；MCU controller circuitry is used to judge whether faulty generation according to voltage value and current value, fault secure circuit is controlled in faulty generation and is acted to protect bus circuit, and controls sound light alarming circuit and issue sound and light alarm signal.
Description
Technical field
The present invention relates to power failure monitoring technical fields, protect electricity more particularly to a kind of bus power source malfunction monitoring
Road.
Background technique
Company's electrical fire monitoring device product carries out data communication function using the communication mode of fire-fighting two lines bus at present,
The accessory power supply of monitoring device is also powered by two lines bus simultaneously；If finding in product test, accessory power supply failure be will affect
The normal communication of equipment room.For the reliability for improving communication between devices, a kind of bus power source short circuit and open circuit fault monitoring are designed
Defencive function circuit is particularly important.
Summary of the invention
The present invention is in view of the problems of the existing technology and insufficient, provides a kind of bus power source malfunction monitoring protection circuit.
The present invention is to solve above-mentioned technical problem by following technical proposals:
The present invention provides a kind of bus power source malfunction monitoring protection circuit, it is characterized in that comprising bus power source input
Circuit, power-switching circuit, MCU controller circuitry, sound light alarming circuit, fault secure circuit, tension measuring circuit, electric current are surveyed
Measure circuit and bus power source output circuit；
The bus power source that the bus power source input circuit is used to input is exported after fault secure circuit to bus electricity
Source follower circuit；
The power-switching circuit is used for based on bus power source generation circuit operating voltage and transmits circuit voltage
To MCU controller circuitry；
The tension measuring circuit is used to detect the voltage value of the output end of fault secure circuit and is transmitted to voltage value
MCU controller circuitry；
The current measurement circuit is used to detect the current value of the output end of fault secure circuit and is transmitted to current value
MCU controller circuitry；
The MCU controller circuitry is used to judge whether faulty generation according to voltage value and current value, in faulty hair
The movement of control fault secure circuit is when raw to protect bus circuit, and controls sound light alarming circuit and issue sound and light alarm signal.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can any combination to get each preferable reality of the present invention
Example.
The positive effect of the present invention is that:
When bus power source breaks down, which can be cut off fault bus power supply from bus, be simultaneously emitted by
Sound and light alarm signal mentions convenient for user scene investigation failure to guarantee bus communication function between other normal monitoring devices
The reliability of high communication between devices.
Detailed description of the invention
Fig. 1 is that the bus power source malfunction monitoring of present pre-ferred embodiments protects the circuit diagram of circuit.
Fig. 2 is that the bus power source malfunction monitoring of present pre-ferred embodiments protects the partial circuit schematic diagram of circuit.
Fig. 3 is the circuit diagram of the MCU controller circuitry of present pre-ferred embodiments.
Fig. 4 is the circuit diagram of the sound light alarming circuit of present pre-ferred embodiments.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, the present embodiment provides a kind of bus power source malfunction monitorings to protect circuit comprising bus power source input
Circuit 1, power-switching circuit 2, MCU controller circuitry 3, sound light alarming circuit 4, fault secure circuit 5, tension measuring circuit 6,
Current measurement circuit 7 and bus power source output circuit 8.
The bus power source that the bus power source input circuit 1 is used to input is exported after fault secure circuit to bus electricity
Source follower circuit.
The power-switching circuit 2 is used for based on bus power source generation circuit operating voltage and transmits circuit voltage
To MCU controller circuitry 3.
The tension measuring circuit 6 is used to detect the voltage value of the output end of fault secure circuit and is transmitted to voltage value
MCU controller circuitry 3.
The current measurement circuit 7 is used to detect the current value of the output end of fault secure circuit and is transmitted to current value
MCU controller circuitry 3.
The MCU controller circuitry 3 is used to judge whether faulty generation according to voltage value and current value, in faulty hair
The movement of control fault secure circuit 5 is when raw to protect bus circuit, and controls sound light alarming circuit 4 and issue sound and light alarm signal.
As shown in Fig. 2, the bus power source input circuit 1 includes common mode inductance L1 and TVS pipe VD1, common mode inductance L1 is defeated
Connecting fault protects circuit 5 after entering to hold connection fire-fighting two lines bus, output end in parallel with TVS pipe VD1.
As shown in Fig. 2, the power-switching circuit 2 include alminium electrolytic condenser C16, C23, ceramic condenser C22, C24, C15,
C19, resistance R22, R23, inductance L3, Schottky diode D4, patch integrated circuit U4 (ONSemi company LM2576) and LDO collection
At circuit U 3 (SIPEX company SPX117-3.3), wherein patch integrated circuit U4 generates 5VDC power supply in fault secure circuit
Relay and sound light alarming circuit in buzzer provide working power, LDO integrated circuit U3 generate 3.3VDC power supply be electricity
Measuring circuit, current measurement circuit, MCU controller circuitry is pressed to provide working power.
The first port of patch integrated circuit U4 passes through alminium electrolytic condenser C16 and ceramic condenser C22 ground connection, third end respectively
Mouth and fifth port are directly grounded, second interface is led to by inductance L3 with 5V power supply, the 4th port of patch integrated circuit U4 is connect
It crosses resistance R22 to connect 5V power supply, be also grounded by resistance R23, the second port and Schottky diode D4 of patch integrated circuit U4
Cathode connection, the plus earth of Schottky diode D4.
The third port of LDO integrated circuit U3 passes through alminium electrolytic condenser C23, ceramic condenser C24 and ceramic condenser C19 respectively
Ground connection, first port is directly grounded, second port connects 3.3V power supply and is grounded by ceramic condenser C15.
As shown in figure 3, the MCU controller circuitry 3 is used to judge that bus power source is normal according to voltage value and current value
Working condition or malfunction, if faulty generation MCU controller circuitry 3 tells open circuit fault or short trouble,
And control signals to fault secure circuit by I/O mouthfuls of transmissions, act fault secure circuit, thus protect bus power source not by
Damage；MCU controller circuitry 3 controls signal by I/O2 mouthfuls of transmissions and issues sound and light alarm signal to sound light alarming circuit 4 simultaneously.
As shown in figure 4, the sound light alarming circuit mainly includes 1 buzzer circuit and 2 circuit of LED, when
When bus power source breaks down, buzzer circuit issues fault alarm sound, and 2 circuit of LED are sent out according to bus power source
Raw short circuit or open circuit fault issue fault type alarm optical signal respectively, carry out malfunction elimination convenient for onsite user.
As shown in Fig. 2, the fault secure circuit 5 includes resistance R14, R19, R6, R10, R1, R2, R3, ceramic condenser
C1, C2, C13, optocoupler N1, PNP triode Q3, PMOS tube Q2, varistor RV2, relay K1, diode D1, NPN triode
Q1。
Optocoupler (N1) first port controls signal, optocoupler by the Bus_Opto that resistance (R19) connects MCU control circuit
(N1) first port is grounded by ceramic condenser (C13), and optocoupler (N1) second port is directly grounded, and the 4th port of optocoupler (N1) connects
PNP triode (Q3) emitter is connect, optocoupler (N1) third port connects PNP triode (Q3) base stage, PNP by resistance (R14)
Triode (Q3) emitter connects the output end of the bus power source input circuit, and ceramic condenser one end (C2) connects tri- pole PNP
(Q3) emitter is managed, ceramic condenser (C2) other end connects PNP triode (Q3) base stage, and resistance one end (R6) connects tri- pole PNP
(Q3) emitter is managed, resistance (R6) other end connects PNP triode (Q3) collector, and PMOS tube (Q2) grid connects tri- pole PNP
(Q3) collector is managed, PMOS tube (Q2) grid is grounded by resistance (R10), and PMOS tube (Q2) source electrode connects PNP triode (Q3)
Emitter, PMOS tube (Q2) drain electrode connect PNP triode (Q3) base stage, PMOS tube (Q2) drain electrode connection relay by resistance (R3)
Device (K1) exports third port, and relay (K1) exports the input terminal of the 4th port connection bus power source output circuit, pressure-sensitive electricity
Resistance both ends (RV2) are parallel to relay (K1) output third port and the 4th port, relay (K1) coil first port meet 5V
Working power, relay (K1) coil second port connect NPN triode (Q1) collector, and diode (D1) cathode connects 5V work electricity
Source, diode (D1) anode contact relay (K1) coil second port, NPN triode (Q1) emitter are directly grounded, tri- pole NPN
It manages (Q1) base stage to be grounded by ceramic condenser (C1), NPN triode (Q1) base stage connects MCU control circuit by resistance (R2)
Bus_Relay controls signal, and the Bus_Relay control signal drop-down of MCU control circuit is grounded by resistance (R1).
When open circuit fault occurs, MCU controller circuitry controls signal Bus_Opto by I/O1 mouthfuls of sendings, and optocoupler N1 is led
Logical, so that PNP triode Q3 is acted, after PNP triode Q3 conducting, PMOS tube Q2 grid high level, PMOS tube Q2 is turned off at this time,
To cut off the connection of bus power source Yu bus power source output circuit.
When short trouble occurs, MCU controller circuitry issues control signal Bus_Relay, and NPN triode Q1 is connected,
To which relay K1 is acted, prevents when bus power source short trouble electric current excessive and damage bus power source.
As shown in Fig. 2, the tension measuring circuit 6 measures the voltage value of bus power source, send after signal processing
To the port A/D1 of MCU controller circuitry 3, MCU controller circuitry 3 judges whether bus power source is faulty according to voltage value.
As shown in Fig. 2, the current measurement circuit 7 measures the current value of bus power source, send after signal processing
To the port A/D2 of MCU controller circuitry 3, MCU controller circuitry 3 judges whether bus power source is faulty according to current value.
As shown in Fig. 2, the bus power source output circuit 8 includes TVS pipe VD2, common mode inductance L2, varistor RV1, gas
Body discharge tube G1, wherein both ends are separately connected bus power source output circuit two after varistor RV1 and gas-discharge tube G1 series connection
End, when bus power source output circuit receives the interference signals such as static discharge, surge voltage, varistor RV1 and gas-discharge tube
G1 constitutes first class of protection circuit, and common mode inductance L2 and TVS pipe VD2 constitute safe secondary protection circuit, further power bus output electricity
Road is protected, and the anti-interference ability of bus power source is improved.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that these
It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back
Under the premise of from the principle and substance of the present invention, many changes and modifications may be made, but these are changed
Protection scope of the present invention is each fallen with modification.
Claims (9)
1. a kind of bus power source malfunction monitoring protects circuit, which is characterized in that it includes bus power source input circuit, power supply conversion
Circuit, MCU controller circuitry, sound light alarming circuit, fault secure circuit, tension measuring circuit, current measurement circuit and bus
Power output circuit；
The bus power source that the bus power source input circuit is used to input exports defeated to bus power source after fault secure circuit
Circuit out；
The power-switching circuit is used for based on bus power source generation circuit operating voltage and circuit voltage is transmitted to MCU
Controller circuitry；
The tension measuring circuit is used to detect the voltage value of the output end of fault secure circuit and voltage value is transmitted to MCU control
Device circuit processed；
The current measurement circuit is used to detect the current value of the output end of fault secure circuit and current value is transmitted to MCU control
Device circuit processed；
The MCU controller circuitry is used to judge whether faulty generation according to voltage value and current value, in faulty generation
Fault secure circuit movement is controlled to protect bus circuit, and controls sound light alarming circuit and issues sound and light alarm signal.
2. bus power source malfunction monitoring as described in claim 1 protects circuit, which is characterized in that the bus power source input electricity
Road includes common mode inductance (L1) and TVS pipe (VD1), and common mode inductance (L1) input terminal connects fire-fighting two lines bus, output end and TVS pipe
(VD1) connecting fault protects circuit after parallel connection.
3. bus power source malfunction monitoring as described in claim 1 protects circuit, which is characterized in that the power-switching circuit packet
Include alminium electrolytic condenser (C16, C23), ceramic condenser (C22, C24, C15, C19), resistance (R22, R23), inductance (L3), Schottky
Diode (D4), patch integrated circuit (U4) and LDO integrated circuit (U3), wherein patch integrated circuit (U4) generates 5VDC power supply
Working power, LDO integrated circuit (U3) are provided to the buzzer in the relay and sound light alarming circuit in fault secure circuit
Generation 3.3VDC power supply is tension measuring circuit, current measurement circuit, MCU controller circuitry provide working power；
The first port of patch integrated circuit (U4) passes through alminium electrolytic condenser (C16) and ceramic condenser (C22) ground connection, third respectively
Port and fifth port are directly grounded, second interface passes through inductance (L3) and connect 5V power supply, and the 4th of patch integrated circuit (U4) the
Port connects 5V power supply by resistance (R22), also by resistance (R23) ground connection, the second port of patch integrated circuit (U4) and Xiao
The cathode of special based diode (D4) connects, the plus earth of Schottky diode (D4)；
The third port of LDO integrated circuit (U3) passes through alminium electrolytic condenser (C23), ceramic condenser (C24) and ceramic condenser respectively
(C19) it is grounded, first port is directly grounded, second port connects 3.3V power supply and is grounded by ceramic condenser (C15).
4. bus power source malfunction monitoring as described in claim 1 protects circuit, which is characterized in that the MCU controller circuitry
For judging that bus power source is normal operating conditions or malfunction according to voltage value and current value, if faulty generation MCU
Controller circuitry tells open circuit fault or short trouble, and controls signals to fault secure circuit by I/O mouthfuls of transmissions,
Act fault secure circuit, to protect bus power source not damaged；MCU controller circuitry is controlled by I/O2 mouthfuls of transmissions simultaneously
Signal processed issues sound and light alarm signal to sound light alarming circuit.
5. bus power source malfunction monitoring as described in claim 1 protects circuit, which is characterized in that the sound light alarming circuit master
It to include 1 buzzer circuit and 2 circuit of LED, when bus power source breaks down, buzzer circuit issues event
Hinder alarm sound, short circuit occurs according to bus power source for 2 circuit of LED or open circuit fault issues fault type report respectively
Alert optical signal.
6. bus power source malfunction monitoring as described in claim 1 protects circuit, which is characterized in that the fault secure circuit packet
Include resistance (R14, R19, R6, R10, R1, R2, R3), ceramic condenser (C1, C2, C13), optocoupler (N1), PNP triode (Q3),
PMOS tube (Q2), varistor (RV2), relay (K1), diode (D1), NPN triode (Q1)；
Optocoupler (N1) first port controls signal, optocoupler (N1) the by the Bus_Opto that resistance (R19) connects MCU control circuit
Single port is grounded by ceramic condenser (C13), and optocoupler (N1) second port is directly grounded, and the 4th port of optocoupler (N1) connects PNP
Triode (Q3) emitter, optocoupler (N1) third port connect PNP triode (Q3) base stage, PNP triode by resistance (R14)
(Q3) emitter connects the output end of the bus power source input circuit, and ceramic condenser one end (C2) connects PNP triode (Q3)
Emitter, ceramic condenser (C2) other end connect PNP triode (Q3) base stage, and resistance one end (R6) connects PNP triode (Q3)
Emitter, resistance (R6) other end connect PNP triode (Q3) collector, and PMOS tube (Q2) grid connects PNP triode (Q3)
Collector, PMOS tube (Q2) grid are grounded by resistance (R10), and PMOS tube (Q2) source electrode connects PNP triode (Q3) emitter,
PMOS tube (Q2) drain electrode connects PNP triode (Q3) base stage, PMOS tube (Q2) drain electrode connection relay (K1) by resistance (R3)
Third port is exported, relay (K1) exports the input terminal of the 4th port connection bus power source output circuit, varistor (RV2)
Both ends are parallel to relay (K1) output third port and the 4th port, and relay (K1) coil first port connects 5V work electricity
Source, relay (K1) coil second port connect NPN triode (Q1) collector, and diode (D1) cathode connects 5V working power, and two
Pole pipe (D1) anode contact relay (K1) coil second port, NPN triode (Q1) emitter are directly grounded, NPN triode
(Q1) base stage is grounded by ceramic condenser (C1), and NPN triode (Q1) base stage connects MCU control circuit by resistance (R2)
Bus_Relay controls signal, and the Bus_Relay control signal drop-down of MCU control circuit is grounded by resistance (R1)；
When open circuit fault occurs, MCU controller circuitry controls signal Bus_Opto by I/O1 mouthfuls of sendings, and optocoupler (N1) is led
It is logical, so that PNP triode (Q3) acts, after PNP triode (Q3) conducting, PMOS tube (Q2) grid high level, PMOS tube (Q2)
It turns off at this time, to cut off the connection of bus power source Yu bus power source output circuit；
When short trouble occurs, MCU controller circuitry issues control signal Bus_Relay, and NPN triode (Q1) is connected, from
And relay (K1) acts, and prevents when bus power source short trouble electric current excessive and damages bus power source.
7. bus power source malfunction monitoring as described in claim 1 protects circuit, which is characterized in that the tension measuring circuit pair
The voltage value of bus power source measures, and is sent after signal processing to the port A/D1 of MCU controller circuitry, MCU controller electricity
Road judges whether bus power source is faulty according to voltage value.
8. bus power source malfunction monitoring as described in claim 1 protects circuit, which is characterized in that the current measurement circuit pair
The current value of bus power source measures, and is sent after signal processing to the port A/D2 of MCU controller circuitry, MCU controller electricity
Road judges whether bus power source is faulty according to current value.
9. bus power source malfunction monitoring as described in claim 1 protects circuit, which is characterized in that the bus power source output electricity
Road includes TVS pipe (VD2), common mode inductance (L2), varistor (RV1), gas-discharge tube (G1), wherein varistor (RV1)
Bus power source output circuit both ends are separately connected with both ends after gas-discharge tube (G1) series connection, when bus power source output circuit receives
When the interference signals such as static discharge, surge voltage, varistor (RV1) and gas-discharge tube (G1) constitute first class of protection circuit, altogether
Mould inductance (L2) and TVS pipe (VD2) constitute safe secondary protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811151272.6A CN109193571B (en) | 2018-09-29 | 2018-09-29 | Bus power failure monitoring protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811151272.6A CN109193571B (en) | 2018-09-29 | 2018-09-29 | Bus power failure monitoring protection circuit |
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| CN109193571A true CN109193571A (en) | 2019-01-11 |
| CN109193571B CN109193571B (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811151272.6A Active CN109193571B (en) | 2018-09-29 | 2018-09-29 | Bus power failure monitoring protection circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110086142A (en) * | 2019-04-25 | 2019-08-02 | 瑞纳智能设备股份有限公司 | A kind of protective device based on MBUS node cluster |
| CN111044573A (en) * | 2019-11-28 | 2020-04-21 | 浙江大华技术股份有限公司 | Fault detection circuit and method for gas sensor |
| CN112953480A (en) * | 2019-12-11 | 2021-06-11 | 浙江正泰电器股份有限公司 | Circuit breaker accessory protection module |
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| CN204167883U (en) * | 2014-10-25 | 2015-02-18 | 西安科技大学 | A kind of 10kV line short fault microcomputer protective relay device |
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| CN209046247U (en) * | 2018-09-29 | 2019-06-28 | 江苏斯菲尔电气股份有限公司 | Bus power source malfunction monitoring protects circuit |
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| CN103779833A (en) * | 2014-02-21 | 2014-05-07 | 朱志伟 | DC leakage current detection and protection circuit and detection and protection method |
| CN204167883U (en) * | 2014-10-25 | 2015-02-18 | 西安科技大学 | A kind of 10kV line short fault microcomputer protective relay device |
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| CN110086142A (en) * | 2019-04-25 | 2019-08-02 | 瑞纳智能设备股份有限公司 | A kind of protective device based on MBUS node cluster |
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| CN112953480A (en) * | 2019-12-11 | 2021-06-11 | 浙江正泰电器股份有限公司 | Circuit breaker accessory protection module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109193571B (en) | 2024-03-12 |
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