CN104391164A - High-precision mains supply monitoring system - Google Patents
High-precision mains supply monitoring system Download PDFInfo
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- CN104391164A CN104391164A CN201410660173.6A CN201410660173A CN104391164A CN 104391164 A CN104391164 A CN 104391164A CN 201410660173 A CN201410660173 A CN 201410660173A CN 104391164 A CN104391164 A CN 104391164A
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Abstract
The invention discloses a high-precision mains supply monitoring system. The system comprises a comparison circuit, an over-voltage detection circuit, an under-voltage detection circuit, a protection circuit and an oscillation circuit, wherein the over-voltage detection circuit and the under-voltage detection circuit are both connected with the comparison circuit; the protection circuit is simultaneously connected with the over-voltage detection circuit and the under-voltage detection circuit; the oscillating circuit is connected with the protection circuit; the system is characterized by also comprising a filter circuit, wherein the filter circuit consists of an operational amplifier T1, an operation amplifier T2, a capacitor C3 and the like; the positive electrode of capacitor C3 is simultaneously connected with the protection circuit and the over-voltage detection circuit, and the negative electrode of capacitor C3 is connected with an output end of the operational amplifier T1 through a resistor R8 and a potentiometer R9. The system can be used for monitoring a mains supply; when the voltage of the mains supply is over-high or over-low, an alarm is sent out and the power of a power supply system of an electric appliance is automatically cut off, so that the electric appliance is protected from being damaged; meanwhile, the system is provided with the filter circuit which can be used for filtering undesired frequency, so that the monitoring result of the system is more accurate.
Description
Technical field
The present invention relates to electronic applications, specifically refer to a kind of high precision civil power monitoring system.
Background technology
Electric energy is the one energy easily, and its widespread use defines the second technical revolution in mankind's modern history.Effectively promote the development of human society, created great riches to the mankind, improve the life of the mankind.Along with popularizing of electrical network, present every household has all used household electrical appliance, brings very large change to the life of the mankind.
But along with the continuous increase of power consumption, civil power there will be unavoidably because load is excessive or supply line is aging etc. that reason causes power supply instability, thus affects the normal use of household electrical appliance, even has influence on serviceable life.
Summary of the invention
The object of the invention is to overcome the defect affecting household electrical appliance serviceable life because mains-supplied is unstable, a kind of high precision civil power monitoring system can monitoring city's Electrical change is in advance provided.
Object of the present invention is achieved through the following technical solutions: a kind of high precision civil power monitoring system, comprise Comparison Circuit, the over-voltage detection circuit be all connected with Comparison Circuit and undervoltage detection circuit, the protection circuit be simultaneously connected with undervoltage detection circuit with over-voltage detection circuit, and the oscillatory circuit to be connected with protection circuit, also comprise filtering circuit, described filtering circuit is by operational amplifier T1, with operational amplifier T2, positive pole is connected with over-voltage detection circuit with protection circuit simultaneously, the electric capacity C3 that negative pole is connected with the output terminal of operational amplifier T1 after potentiometer R9 through resistance R8, positive pole is connected with the negative pole of electric capacity C3, the electric capacity C5 that negative pole is connected with the inverting input of operational amplifier T2, one end is connected with the positive pole of electric capacity C3, the resistance R7 that the other end is connected with the inverting input of operational amplifier T2 after potentiometer R11 through resistance R10, positive pole is connected with the tie point of resistance R10 with resistance R7, the electric capacity C4 that negative pole is connected with the output terminal of operational amplifier T1, and one end is connected with the normal phase input end of operational amplifier T2, the resistance R12 of other end ground connection forms, the output terminal of described operational amplifier T1 is connected with the sliding end of potentiometer R9, inverting input is then connected with the sliding end of resistance R12, normal phase input end is connected with its output terminal.
Further, described Comparison Circuit by electric capacity C1, diode D1, resistance R3, potentiometer R1, and potentiometer R2 forms; P pole ground connection, its N pole after electric capacity C1 of diode D1 are then connected with undervoltage detection circuit after potentiometer R2 through resistance R3, one end of potentiometer R1 is connected with the tie point of potentiometer R2 with resistance R3, the other end is then connected with the tie point of undervoltage detection circuit with potentiometer R2, the sliding end of potentiometer R1 is connected with over-voltage detection circuit, and the sliding end of potentiometer R2 is then connected with undervoltage detection circuit.
Described over-voltage detection circuit is by resistance R4, and the first pilot lamp VL1, phase inverter P1, phase inverter P3, diode D3 form; One end of resistance R4 is simultaneously with the positive pole of electric capacity C3 and protection circuit is connected, the other end is connected with the positive terminal of phase inverter P3 after the first pilot lamp VL1; the positive terminal of phase inverter P1 is connected with the sliding end of potentiometer R1, its end of oppisite phase is connected with the positive terminal of phase inverter P3, and the N pole of diode D3 is connected with protection circuit with undervoltage detection circuit simultaneously, P pole is then connected with the end of oppisite phase of phase inverter P3.
Described undervoltage detection circuit comprises phase inverter P2, diode D2, the second pilot lamp VL2, resistance R5; The positive terminal of phase inverter P2 is connected with the sliding end of potentiometer R2, its end of oppisite phase is then connected with protection circuit with potentiometer R2 after resistance R5 through the second pilot lamp VL2 simultaneously, and the P pole of diode D2 is connected with the end of oppisite phase of phase inverter P2, its N pole is then connected with the N pole of diode D3.
Described protection circuit comprises triode VT1, relay K, diode D4, resistance R6; The N pole of diode D4 is connected with the positive pole of electric capacity C3, its P pole is then connected with the collector of triode VT1, relay K and diode D4 are in parallel, one end of resistance R6 is connected with the base stage of triode VT1, the other end is connected with the N pole of diode D3, and the collector of triode VT1 is connected with oscillatory circuit, emitter is connected with the tie point of potentiometer R2 with resistance R5.
Described oscillatory circuit is by phase inverter P4, and diode D5, phase inverter P5, phase inverter P6, resistance R13, electric capacity C2, oscillator YD form; The N pole of diode D5 is connected with the end of oppisite phase of phase inverter P4, its P pole is then connected with the positive terminal of phase inverter P5, one end of resistance R13 is connected with the end of oppisite phase of phase inverter P5, the other end is then connected with the forward end of phase inverter P5, and electric capacity C2 positive pole is connected with the end of oppisite phase of phase inverter P6, negative pole is connected with the positive terminal of phase inverter P5; The positive terminal of described phase inverter P4 is connected with the collector of triode VT1, the end of oppisite phase of phase inverter P5 is connected with the positive terminal of phase inverter P6, while the end of oppisite phase of phase inverter P6 is connected with the emitter of triode VT1 after oscillator YD after the normally closed contact K1 of relay K as circuit one output terminal.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention can to row monitoring during civil power, and when line voltage is too high or too low, it can give the alarm and automatically disconnect the power supply of electrical appliance electric power system, thus protection electrical appliance is not damaged.
(2) the present invention is provided with filtering circuit, can filter, make the monitoring result of system more accurate to the frequency of not demand.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1; high precision civil power monitoring system of the present invention, comprises Comparison Circuit, the over-voltage detection circuit be all connected with Comparison Circuit and undervoltage detection circuit; the protection circuit be simultaneously connected with undervoltage detection circuit with over-voltage detection circuit, and the oscillatory circuit be connected with protection circuit.In order to make system monitoring result more accurate, in system, be also provided with filtering circuit.
Filtering circuit can filter unwanted frequency, it is by operational amplifier T1, with operational amplifier T2, positive pole is connected with over-voltage detection circuit with protection circuit simultaneously, the electric capacity C3 that negative pole is connected with the output terminal of operational amplifier T1 after potentiometer R9 through resistance R8, positive pole is connected with the negative pole of electric capacity C3, the electric capacity C5 that negative pole is connected with the inverting input of operational amplifier T2, one end is connected with the positive pole of electric capacity C3, the resistance R7 that the other end is connected with the inverting input of operational amplifier T2 after potentiometer R11 through resistance R10, positive pole is connected with the tie point of resistance R10 with resistance R7, the electric capacity C4 that negative pole is connected with the output terminal of operational amplifier T1, and one end is connected with the normal phase input end of operational amplifier T2, the resistance R12 of other end ground connection forms, the output terminal of described operational amplifier T1 is connected with the sliding end of potentiometer R9, inverting input is then connected with the sliding end of resistance R12, normal phase input end is connected with its output terminal.As long as adjustment potentiometer R9 and potentiometer R11 then can adjust the scope of filtering.
Comparison Circuit is for detecting line voltage change input signal, and it is by electric capacity C1, diode D1, resistance R3, potentiometer R1, and potentiometer R2 forms; P pole ground connection, its N pole after electric capacity C1 of diode D1 are then connected with undervoltage detection circuit after potentiometer R2 through resistance R3, one end of potentiometer R1 is connected with the tie point of potentiometer R2 with resistance R3, the other end is then connected with the tie point of undervoltage detection circuit with potentiometer R2, the sliding end of potentiometer R1 is connected with over-voltage detection circuit, and the sliding end of potentiometer R2 is then connected with undervoltage detection circuit.
Whether over-voltage detection circuit is too high for detecting line voltage, and it is by resistance R4, and the first pilot lamp VL1, phase inverter P1, phase inverter P3, diode D3 form; One end of resistance R4 is simultaneously with the positive pole of electric capacity C3 and protection circuit is connected, the other end is connected with the positive terminal of phase inverter P3 after the first pilot lamp VL1; the positive terminal of phase inverter P1 is connected with the sliding end of potentiometer R1, its end of oppisite phase is connected with the positive terminal of phase inverter P3, and the N pole of diode D3 is connected with protection circuit with undervoltage detection circuit simultaneously, P pole is then connected with the end of oppisite phase of phase inverter P3.
Undervoltage detection circuit comprises phase inverter P2, diode D2, the second pilot lamp VL2, resistance R5 for detecting whether too low it of line voltage.During connection; the positive terminal of phase inverter P2 is connected with the sliding end of potentiometer R2, its end of oppisite phase is then connected with protection circuit with potentiometer R2 after resistance R5 through the second pilot lamp VL2 simultaneously, and the P pole of diode D2 is connected with the end of oppisite phase of phase inverter P2, its N pole is then connected with the N pole of diode D3.
When line voltage is too high or too low, all can trigger protection circuit.This protection circuit comprises triode VT1, relay K, diode D4, resistance R6; The N pole of diode D4 is connected with the positive pole of electric capacity C3, its P pole is then connected with the collector of triode VT1, relay K and diode D4 are in parallel, one end of resistance R6 is connected with the base stage of triode VT1, the other end is connected with the N pole of diode D3, and the collector of triode VT1 is connected with oscillatory circuit, emitter is connected with the tie point of potentiometer R2 with resistance R5.
Described oscillatory circuit is by phase inverter P4, and diode D5, phase inverter P5, phase inverter P6, resistance R13, electric capacity C2, oscillator YD form; The N pole of diode D5 is connected with the end of oppisite phase of phase inverter P4, its P pole is then connected with the positive terminal of phase inverter P5, one end of resistance R13 is connected with the end of oppisite phase of phase inverter P5, the other end is then connected with the forward end of phase inverter P5, and electric capacity C2 positive pole is connected with the end of oppisite phase of phase inverter P6, negative pole is connected with the positive terminal of phase inverter P5; The positive terminal of described phase inverter P4 is connected with the collector of triode VT1, the end of oppisite phase of phase inverter P5 is connected with the positive terminal of phase inverter P6, while the end of oppisite phase of phase inverter P6 is connected with the emitter of triode VT1 after oscillator YD after the normally closed contact K1 of relay K as circuit one output terminal.
When civil power is normal, phase inverter P1 exports high level, phase inverter P3 and phase inverter P2 output low level, and at this moment the first pilot lamp VL1 and the second pilot lamp VL2 is not luminous, and triode VT1 ends, and relay K is failure to actuate, and electrical equipment normally works.
When mains supply over-voltage or under-voltage time, triode VT1 conducting, its normally closed contact of relay K work disconnects, thus cuts off appliances power source, and simultaneously corresponding pilot lamp is luminous.
As mentioned above, just well the present invention can be implemented.
Claims (6)
1. a high precision civil power monitoring system, comprise Comparison Circuit, the over-voltage detection circuit be all connected with Comparison Circuit and undervoltage detection circuit, the protection circuit be simultaneously connected with undervoltage detection circuit with over-voltage detection circuit, and the oscillatory circuit to be connected with protection circuit, it is characterized in that: also comprise filtering circuit, described filtering circuit is by operational amplifier T1, with operational amplifier T2, positive pole is connected with over-voltage detection circuit with protection circuit simultaneously, the electric capacity C3 that negative pole is connected with the output terminal of operational amplifier T1 after potentiometer R9 through resistance R8, positive pole is connected with the negative pole of electric capacity C3, the electric capacity C5 that negative pole is connected with the inverting input of operational amplifier T2, one end is connected with the positive pole of electric capacity C3, the resistance R7 that the other end is connected with the inverting input of operational amplifier T2 after potentiometer R11 through resistance R10, positive pole is connected with the tie point of resistance R10 with resistance R7, the electric capacity C4 that negative pole is connected with the output terminal of operational amplifier T1, and one end is connected with the normal phase input end of operational amplifier T2, the resistance R12 of other end ground connection forms, the output terminal of described operational amplifier T1 is connected with the sliding end of potentiometer R9, inverting input is then connected with the sliding end of resistance R12, normal phase input end is connected with its output terminal.
2. a kind of high precision civil power monitoring system according to claim 1, is characterized in that: described Comparison Circuit by electric capacity C1, diode D1, resistance R3, potentiometer R1, and potentiometer R2 forms; P pole ground connection, its N pole after electric capacity C1 of diode D1 are then connected with undervoltage detection circuit after potentiometer R2 through resistance R3, one end of potentiometer R1 is connected with the tie point of potentiometer R2 with resistance R3, the other end is then connected with the tie point of undervoltage detection circuit with potentiometer R2, the sliding end of potentiometer R1 is connected with over-voltage detection circuit, and the sliding end of potentiometer R2 is then connected with undervoltage detection circuit.
3. a kind of high precision civil power monitoring system according to claim 2, is characterized in that: described over-voltage detection circuit is by resistance R4, and the first pilot lamp VL1, phase inverter P1, phase inverter P3, diode D3 form; One end of resistance R4 is simultaneously with the positive pole of electric capacity C3 and protection circuit is connected, the other end is connected with the positive terminal of phase inverter P3 after the first pilot lamp VL1; the positive terminal of phase inverter P1 is connected with the sliding end of potentiometer R1, its end of oppisite phase is connected with the positive terminal of phase inverter P3, and the N pole of diode D3 is connected with protection circuit with undervoltage detection circuit simultaneously, P pole is then connected with the end of oppisite phase of phase inverter P3.
4. a kind of high precision civil power monitoring system according to claim 3, is characterized in that: described undervoltage detection circuit comprises phase inverter P2, diode D2, the second pilot lamp VL2, resistance R5; The positive terminal of phase inverter P2 is connected with the sliding end of potentiometer R2, its end of oppisite phase is then connected with protection circuit with potentiometer R2 after resistance R5 through the second pilot lamp VL2 simultaneously, and the P pole of diode D2 is connected with the end of oppisite phase of phase inverter P2, its N pole is then connected with the N pole of diode D3.
5. a kind of high precision civil power monitoring system according to claim 4, is characterized in that: described protection circuit comprises triode VT1, relay K, diode D4, resistance R6; The N pole of diode D4 is connected with the positive pole of electric capacity C3, its P pole is then connected with the collector of triode VT1, relay K and diode D4 are in parallel, one end of resistance R6 is connected with the base stage of triode VT1, the other end is connected with the N pole of diode D3, and the collector of triode VT1 is connected with oscillatory circuit, emitter is connected with the tie point of potentiometer R2 with resistance R5.
6. a kind of high precision civil power monitoring system according to claim 5, is characterized in that: described oscillatory circuit is by phase inverter P4, and diode D5, phase inverter P5, phase inverter P6, resistance R13, electric capacity C2, oscillator YD form; The N pole of diode D5 is connected with the end of oppisite phase of phase inverter P4, its P pole is then connected with the positive terminal of phase inverter P5, one end of resistance R13 is connected with the end of oppisite phase of phase inverter P5, the other end is then connected with the forward end of phase inverter P5, and electric capacity C2 positive pole is connected with the end of oppisite phase of phase inverter P6, negative pole is connected with the positive terminal of phase inverter P5; The positive terminal of described phase inverter P4 is connected with the collector of triode VT1, the end of oppisite phase of phase inverter P5 is connected with the positive terminal of phase inverter P6, while the end of oppisite phase of phase inverter P6 is connected with the emitter of triode VT1 after oscillator YD after the normally closed contact K1 of relay K as circuit one output terminal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410660173.6A CN104391164A (en) | 2014-11-18 | 2014-11-18 | High-precision mains supply monitoring system |
| CN201510309920.6A CN104868470A (en) | 2014-11-18 | 2015-06-08 | High-precision symmetric voltage stabilizing oscillation type commercial power monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410660173.6A CN104391164A (en) | 2014-11-18 | 2014-11-18 | High-precision mains supply monitoring system |
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| CN104391164A true CN104391164A (en) | 2015-03-04 |
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| CN201410660173.6A Pending CN104391164A (en) | 2014-11-18 | 2014-11-18 | High-precision mains supply monitoring system |
| CN201510309920.6A Pending CN104868470A (en) | 2014-11-18 | 2015-06-08 | High-precision symmetric voltage stabilizing oscillation type commercial power monitoring system |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510309920.6A Pending CN104868470A (en) | 2014-11-18 | 2015-06-08 | High-precision symmetric voltage stabilizing oscillation type commercial power monitoring system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901565A (en) * | 2014-11-27 | 2015-09-09 | 成都雷克尔科技有限公司 | Multistage-power-amplification-balanced-modulation-circuit-base mixing protection type switching voltage-stabilized power supply |
| CN104935190A (en) * | 2014-11-27 | 2015-09-23 | 成都雷克尔科技有限公司 | Combined protection logic protection amplification type driving power supply for power system fault detection |
| CN104935193A (en) * | 2014-11-27 | 2015-09-23 | 成都雷克尔科技有限公司 | Compound protection type logic amplification type double-buffering driving power supply used for power failure detection |
| CN104953866A (en) * | 2014-11-27 | 2015-09-30 | 成都雷克尔科技有限公司 | Combined protective multiplexed output voltage-stabilized power source based on logic protection amplifying circuit |
| CN104993725A (en) * | 2014-11-27 | 2015-10-21 | 成都雷克尔科技有限公司 | Composite protective logic amplification driving power supply for power fault detection |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0079128B1 (en) * | 1981-10-20 | 1987-01-07 | LUCAS INDUSTRIES public limited company | Regulator for a dynamo |
| CN104393563A (en) * | 2014-11-18 | 2015-03-04 | 成都措普科技有限公司 | Mains supply monitoring system |
| CN204304398U (en) * | 2014-11-18 | 2015-04-29 | 成都措普科技有限公司 | A kind of high accuracy civil power monitoring system |
| CN204304397U (en) * | 2014-11-18 | 2015-04-29 | 成都措普科技有限公司 | A kind of civil power monitoring system |
-
2014
- 2014-11-18 CN CN201410660173.6A patent/CN104391164A/en active Pending
-
2015
- 2015-06-08 CN CN201510309920.6A patent/CN104868470A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901565A (en) * | 2014-11-27 | 2015-09-09 | 成都雷克尔科技有限公司 | Multistage-power-amplification-balanced-modulation-circuit-base mixing protection type switching voltage-stabilized power supply |
| CN104935190A (en) * | 2014-11-27 | 2015-09-23 | 成都雷克尔科技有限公司 | Combined protection logic protection amplification type driving power supply for power system fault detection |
| CN104935193A (en) * | 2014-11-27 | 2015-09-23 | 成都雷克尔科技有限公司 | Compound protection type logic amplification type double-buffering driving power supply used for power failure detection |
| CN104953866A (en) * | 2014-11-27 | 2015-09-30 | 成都雷克尔科技有限公司 | Combined protective multiplexed output voltage-stabilized power source based on logic protection amplifying circuit |
| CN104993725A (en) * | 2014-11-27 | 2015-10-21 | 成都雷克尔科技有限公司 | Composite protective logic amplification driving power supply for power fault detection |
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| CN104868470A (en) | 2015-08-26 |
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Application publication date: 20150304 |