CN204142830U - A kind of line voltage abnormity alarm circuit - Google Patents
A kind of line voltage abnormity alarm circuit Download PDFInfo
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- CN204142830U CN204142830U CN201420542127.1U CN201420542127U CN204142830U CN 204142830 U CN204142830 U CN 204142830U CN 201420542127 U CN201420542127 U CN 201420542127U CN 204142830 U CN204142830 U CN 204142830U
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- 230000002159 abnormal effect Effects 0.000 claims abstract description 5
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The utility model discloses a kind of line voltage abnormity alarm circuit, comprise power circuit, sample circuit, comparator circuit and warning circuit, power circuit provides voltage analog signal for circuit, sample circuit compares by being input to comparator circuit from the DC voltage of power circuit collection after resistance R1 and potentiometer RP1 dividing potential drop, comparator circuit by sampling circuit samples to voltage and upper and lower limit reference voltage compare respectively to judge line voltage abnormal conditions, warning circuit is by sending different alarm sounds to distinguish various electric voltage exception situation.The utility model is by using with three terminal regulator 7812 and 555 timer as core, cheap electronic component, circuit cost is effectively controlled, and use resistive element less, consume energy low, when electrical network generation overvoltage or under-voltage fault, hummer B1 and hummer B2 can send the different sounds to remind fault type.
Description
Technical field
The utility model relates to a kind of warning circuit, specifically a kind of line voltage abnormity alarm circuit.
Background technology
Electric system needs personnel to carry out the work such as walkaround inspection, operation, repair and maintenance, high-potting, protective calibration and metering debugging to power transformation station equipment.In tour, maintenance, safeguard and process of the test in, operating electrical equipment can because a variety of causes, as: impacted by superpotential, system short-circuit, the significant trouble such as equipment explosion and busbar grounding occurs, transformer station's internal fault point current potential rising peripherally after fault, exceed step voltage and the touch voltage of safety standard permission, can to damaging if personnel are strayed into above-mentioned zone, the serious consequence such as even dead, be necessary so install a kind of line voltage abnormity alarm circuit in electrical network, prior art general circuit structure is more complicated and use electronic component is expensive, it is simple that the utility model aims to provide a kind of structure, consume electric energy few and use the cheap line voltage abnormity alarm circuit of electronic component.
Utility model content
The purpose of this utility model is to provide the line voltage abnormity alarm circuit that a kind of structure is simple, consumption electric energy is few and use electronic component cheap, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of line voltage abnormity alarm circuit, comprise power circuit, sample circuit, comparator circuit and warning circuit, described power circuit comprises reduction voltage circuit, rectification circuit, filtering circuit and mu balanced circuit for circuit provides voltage analog signal, and power circuit comprises alternating-current voltage source U, rectifier bridge Q and three terminal regulator U1; Described sample circuit compares by being input to comparator circuit from the DC voltage of power circuit collection after resistance R1 and potentiometer RP1 dividing potential drop, and sample circuit comprises resistance R1, resistance R2 and potentiometer RP1; Described comparator circuit by sampling circuit samples to voltage and upper and lower limit reference voltage compare respectively to judge line voltage abnormal conditions, comparator circuit comprises four-operational amplifier U4 and resistance R9; Described warning circuit is by sending different alarm sounds to distinguish various electric voltage exception situation, and warning circuit comprises hummer R1, hummer B2 and timer U7.
Described alternating-current voltage source U two ends are connected in parallel on transformer TR1 primary coil two ends, transformer TR1 secondary coil two ends are connected respectively to rectifier bridge Q port one and rectifier bridge Q port 3, rectifier bridge port 4 connects electric capacity C1 respectively, electric capacity C3 and three terminal regulator U1 port one, rectifier bridge port 2 connects electric capacity C2 respectively, electric capacity C4 and three terminal regulator U3 port 2, three terminal regulator U3 port one connects three terminal regulator U1 port 2 respectively, the electric capacity C1 other end, the electric capacity C3 other end, the electric capacity C2 other end, the electric capacity C4 other end and three terminal regulator U2 port 2 also ground connection, described three terminal regulator U1 port 3 connects three terminal regulator U2 port one respectively, four-operational amplifier U4 port 4, four-operational amplifier U4 port 9 and resistance R1, the resistance R1 other end connects potentiometer RP1 and stake resistance R2 successively, described three terminal regulator U3 port 3 connects four-operational amplifier U4 port 5 and four-operational amplifier U4 port one 1 respectively, four-operational amplifier U4 port one contact resistance R9, four-operational amplifier U4 port 2 connects three terminal regulator U2 port 3 respectively, resistance R3, resistance R5, timer U5 port one, resistance R7, timer U6 port one and timer U6 port 4, four-operational amplifier U4 port 3 connects potentiometer RP1 slide plate and four-operational amplifier U4 port 6 respectively, four-operational amplifier U4 port 7 contact resistance R10, four-operational amplifier U4 port 8 connects potentiometer RP2 slide plate, the described resistance R9 other end connects ground connection diode D1 positive pole and timer U7 port 4 respectively, the described resistance R3 other end connects potentiometer RP2 and stake resistance R4 successively, described timer U5 port 2 connects electric capacity C5, the electric capacity C5 other end connects timer U5 port 8 respectively, timer U5 port 6, resistance R6 and hummer B1 ground connection, timer U5 port 3 connects the hummer B1 other end, timer U5 port 4 is the contact resistance R10 other end and ground connection diode D2 positive pole respectively, timer U5 port 7 is the contact resistance R5 other end and the resistance R6 other end respectively, described timer U6 port 2 connects direct earth capacitance C6 respectively, timer U6 port 6 and resistance R8, timer U6 port 3 connects timer U7 port 5, timer U6 port 7 is the contact resistance R7 other end and the resistance R8 other end respectively, timer U6 port 8 connects electric capacity C7 respectively, timer U7 port 8 and hummer B2 ground connection, described timer U7 port one contact resistance R11, timer U7 port 2 connects timer U7 port 6 and resistance R12 respectively, timer U7 port 3 connects the hummer B2 other end, timer U7 port 7 is the contact resistance R11 other end and the resistance R12 other end respectively.
As further program of the utility model: described three terminal regulator U1 and three terminal regulator U3 model are 7812, described three terminal regulator U2 model is 7805, described four-operational amplifier U4 model is LM324, and described timer U5, timer U6 and timer U7 are 555 timers.
As the utility model further scheme: described timer U6 is connected into LF multivibrator, described timer U7 is connected into audio frequency oscillator, the control level end of the output signal control timer U7 of timer U6, the signal making timer U7 alternately produce two kinds of different frequencies exports, and can promote hummer B2 and " drip---beep " sound occurs.
Compared with prior art, the beneficial effects of the utility model are: the utility model by use with three terminal regulator 7812 and 555 timer be core, cheap electronic component, circuit cost is effectively controlled, and use resistive element less, consume energy low, when electrical network generation overvoltage or under-voltage fault, hummer B1 and hummer B2 can send the different sounds to remind fault type.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of line voltage abnormity alarm circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of line voltage abnormity alarm circuit, comprise power circuit, sample circuit, comparator circuit and warning circuit, power circuit comprises reduction voltage circuit, rectification circuit, filtering circuit and mu balanced circuit for circuit provides voltage analog signal, and power circuit comprises alternating-current voltage source U, rectifier bridge Q and three terminal regulator U1; Sample circuit compares by being input to comparator circuit from the DC voltage of power circuit collection after resistance R1 and potentiometer RP1 dividing potential drop, and sample circuit comprises resistance R1, resistance R2 and potentiometer RP1; Comparator circuit by sampling circuit samples to voltage and upper and lower limit reference voltage compare respectively to judge line voltage abnormal conditions, comparator circuit comprises four-operational amplifier U4 and resistance R9; Warning circuit is by sending different alarm sounds to distinguish various electric voltage exception situation, and warning circuit comprises hummer B1, hummer B2 and timer U7.
Alternating-current voltage source U two ends are connected in parallel on transformer TR1 primary coil two ends, transformer TR1 secondary coil two ends are connected respectively to rectifier bridge Q port one and rectifier bridge Q port 3, rectifier bridge port 4 connects electric capacity C1 respectively, electric capacity C3 and three terminal regulator U1 port one, rectifier bridge port 2 connects electric capacity C2 respectively, electric capacity C4 and three terminal regulator U3 port 2, three terminal regulator U3 port one connects three terminal regulator U1 port 2 respectively, the electric capacity C1 other end, the electric capacity C3 other end, the electric capacity C2 other end, the electric capacity C4 other end and three terminal regulator U2 port 2 also ground connection, three terminal regulator U1 port 3 connects three terminal regulator U2 port one respectively, four-operational amplifier U4 port 4, four-operational amplifier U4 port 9 and resistance R1, the resistance R1 other end connects potentiometer RP1 and stake resistance R2 successively, three terminal regulator U3 port 3 connects four-operational amplifier U4 port 5 and four-operational amplifier U4 port one 1 respectively, four-operational amplifier U4 port one contact resistance R9, four-operational amplifier U4 port 2 connects three terminal regulator U2 port 3 respectively, resistance R3, resistance R5, timer U5 port one, resistance R7, timer U6 port one and timer U6 port 4, four-operational amplifier U4 port 3 connects potentiometer RP1 slide plate and four-operational amplifier U4 port 6 respectively, four-operational amplifier U4 port 7 contact resistance R10, four-operational amplifier U4 port 8 connects potentiometer RP2 slide plate, the resistance R9 other end connects ground connection diode D1 positive pole and timer U7 port 4 respectively, the resistance R3 other end connects potentiometer RP2 and stake resistance R4 successively, timer U5 port 2 connects electric capacity C5, the electric capacity C5 other end connects timer U5 port 8 respectively, timer U5 port 6, resistance R6 and hummer B1 ground connection, timer U5 port 3 connects the hummer B1 other end, timer U5 port 4 is the contact resistance R10 other end and ground connection diode D2 positive pole respectively, timer U5 port 7 is the contact resistance R5 other end and the resistance R6 other end respectively, timer U6 port 2 connects direct earth capacitance C6 respectively, timer U6 port 6 and resistance R8, timer U6 port 3 connects timer U7 port 5, timer U6 port 7 is the contact resistance R7 other end and the resistance R8 other end respectively, timer U6 port 8 connects electric capacity C7 respectively, timer U7 port 8 and hummer B2 ground connection, timer U7 port one contact resistance R11, timer U7 port 2 connects timer U7 port 6 and resistance R12 respectively, timer U7 port 3 connects the hummer B2 other end, timer U7 port 7 is the contact resistance R11 other end and the resistance R12 other end respectively.
Three terminal regulator U1 and three terminal regulator U3 model are 7812, and three terminal regulator U2 model is 7805, and four-operational amplifier U4 model is LM324, and timer U5, timer U6 and timer U7 are 555 timers.
Principle of work of the present utility model is: power circuit comprises reduction voltage circuit, rectification circuit, filtering circuit and mu balanced circuit for circuit provides voltage analog signal, sample circuit compares by being input to comparator circuit from the DC voltage of power circuit collection after resistance R1 and potentiometer RP1 dividing potential drop, comparator circuit by sampling circuit samples to voltage and upper and lower limit reference voltage compare respectively to judge line voltage abnormal conditions, warning circuit is by sending different alarm sounds to distinguish various electric voltage exception situation.
Timer U6 is connected into LF multivibrator, timer U7 is connected into audio frequency oscillator, the control level end of the output signal control timer U7 of timer U6, the signal making timer U7 alternately produce two kinds of different frequencies exports, hummer B2 can be promoted " dripping beep " sound occurs, and the sound type that hummer B1 sends is " drip---drip ", namely two kinds of different sound types represent the fault type that superpotential is different with under-voltage two kinds.
Claims (3)
1. a line voltage abnormity alarm circuit, comprise power circuit, sample circuit, comparator circuit and warning circuit, it is characterized in that, described power circuit comprises reduction voltage circuit, rectification circuit, filtering circuit and mu balanced circuit for circuit provides voltage analog signal, and power circuit comprises alternating-current voltage source U, rectifier bridge Q and three terminal regulator U1; Described sample circuit compares by being input to comparator circuit from the DC voltage of power circuit collection after resistance R1 and potentiometer RP1 dividing potential drop, and sample circuit comprises resistance R1, resistance R2 and potentiometer RP1; Described comparator circuit by sampling circuit samples to voltage and upper and lower limit reference voltage compare respectively to judge line voltage abnormal conditions, comparator circuit comprises four-operational amplifier U4 and resistance R9; Described warning circuit is by sending different alarm sounds to distinguish various electric voltage exception situation, and warning circuit comprises hummer B1, hummer B2 and timer U7;
Described alternating-current voltage source U two ends are connected in parallel on transformer TR1 primary coil two ends, transformer TR1 secondary coil two ends are connected respectively to rectifier bridge Q port one and rectifier bridge Q port 3, rectifier bridge port 4 connects electric capacity C1 respectively, electric capacity C3 and three terminal regulator U1 port one, rectifier bridge port 2 connects electric capacity C2 respectively, electric capacity C4 and three terminal regulator U3 port 2, three terminal regulator U3 port one connects three terminal regulator U1 port 2 respectively, the electric capacity C1 other end, the electric capacity C3 other end, the electric capacity C2 other end, the electric capacity C4 other end and three terminal regulator U2 port 2 also ground connection, described three terminal regulator U1 port 3 connects three terminal regulator U2 port one respectively, four-operational amplifier U4 port 4, four-operational amplifier U4 port 9 and resistance R1, the resistance R1 other end connects potentiometer RP1 and stake resistance R2 successively, described three terminal regulator U3 port 3 connects four-operational amplifier U4 port 5 and four-operational amplifier U4 port one 1 respectively, four-operational amplifier U4 port one contact resistance R9, four-operational amplifier U4 port 2 connects three terminal regulator U2 port 3 respectively, resistance R3, resistance R5, timer U5 port one, resistance R7, timer U6 port one and timer U6 port 4, four-operational amplifier U4 port 3 connects potentiometer RP1 slide plate and four-operational amplifier U4 port 6 respectively, four-operational amplifier U4 port 7 contact resistance R10, four-operational amplifier U4 port 8 connects potentiometer RP2 slide plate, the described resistance R9 other end connects ground connection diode D1 positive pole and timer U7 port 4 respectively, the described resistance R3 other end connects potentiometer RP2 and stake resistance R4 successively, described timer U5 port 2 connects electric capacity C5, the electric capacity C5 other end connects timer U5 port 8 respectively, timer U5 port 6, resistance R6 and hummer B1 ground connection, timer U5 port 3 connects the hummer B1 other end, timer U5 port 4 is the contact resistance R10 other end and ground connection diode D2 positive pole respectively, timer U5 port 7 is the contact resistance R5 other end and the resistance R6 other end respectively, described timer U6 port 2 connects direct earth capacitance C6 respectively, timer U6 port 6 and resistance R8, timer U6 port 3 connects timer U7 port 5, timer U6 port 7 is the contact resistance R7 other end and the resistance R8 other end respectively, timer U6 port 8 connects electric capacity C7 respectively, timer U7 port 8 and hummer B2 ground connection, described timer U7 port one contact resistance R11, timer U7 port 2 connects timer U7 port 6 and resistance R12 respectively, timer U7 port 3 connects the hummer B2 other end, timer U7 port 7 is the contact resistance R11 other end and the resistance R12 other end respectively.
2. line voltage abnormity alarm circuit according to claim 1, it is characterized in that, described three terminal regulator U1 and three terminal regulator U3 model are 7812, described three terminal regulator U2 model is 7805, described four-operational amplifier U4 model is LM324, and described timer U5, timer U6 and timer U7 are 555 timers.
3. line voltage abnormity alarm circuit according to claim 1, it is characterized in that, described timer U6 is connected into LF multivibrator, described timer U7 is connected into audio frequency oscillator, the control level end of the output signal control timer U7 of timer U6, the signal making timer U7 alternately produce two kinds of different frequencies exports, and can promote hummer B2 and " drip---beep " sound occurs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420542127.1U CN204142830U (en) | 2014-09-14 | 2014-09-14 | A kind of line voltage abnormity alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420542127.1U CN204142830U (en) | 2014-09-14 | 2014-09-14 | A kind of line voltage abnormity alarm circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204142830U true CN204142830U (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420542127.1U Expired - Fee Related CN204142830U (en) | 2014-09-14 | 2014-09-14 | A kind of line voltage abnormity alarm circuit |
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| Country | Link |
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| CN (1) | CN204142830U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360229A (en) * | 2014-11-13 | 2015-02-18 | 国网河南省电力公司南阳供电公司 | Long-standby-time electric-larceny-preventing inspection instrument |
| CN106971454A (en) * | 2017-04-13 | 2017-07-21 | 深圳怡化电脑股份有限公司 | Fault detection method, device and the fault alarm safeguarded are installed for ATM |
-
2014
- 2014-09-14 CN CN201420542127.1U patent/CN204142830U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360229A (en) * | 2014-11-13 | 2015-02-18 | 国网河南省电力公司南阳供电公司 | Long-standby-time electric-larceny-preventing inspection instrument |
| CN106971454A (en) * | 2017-04-13 | 2017-07-21 | 深圳怡化电脑股份有限公司 | Fault detection method, device and the fault alarm safeguarded are installed for ATM |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20150914 |
|
| EXPY | Termination of patent right or utility model |