CN104407203A - High-sensitivity mains supply monitoring system - Google Patents
High-sensitivity mains supply monitoring system Download PDFInfo
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- CN104407203A CN104407203A CN201410693951.1A CN201410693951A CN104407203A CN 104407203 A CN104407203 A CN 104407203A CN 201410693951 A CN201410693951 A CN 201410693951A CN 104407203 A CN104407203 A CN 104407203A
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Abstract
The invention discloses a high-sensitivity mains supply monitoring system which is characterized by comprising a comparison circuit, an over-voltage detection circuit, an under-voltage detection circuit, a phase shift circuit, a protection circuit, a trigger circuit and an oscillation circuit. The over-voltage detection circuit, the under-voltage detection circuit and the phase shift circuit are simultaneously connected with the comparison circuit, the protection circuit is connected with the over-voltage detection circuit and the under-voltage detection circuit, the trigger circuit is connected with the protection circuit, and the oscillation circuit is connected with the trigger circuit; the phase shift circuit comprises a phase shift chip U1, a triode VT3, a triode VT4, a resistor R12, a capacitor C4, a resistor R11 and the like, one end of the resistor R12 is connected a pin VCC+ of the phase shift chip U1, the other end of the resistor R12 is connected with a pin IN1 of the phase shift chip U1, a cathode of the capacitor C4 is connected with the over-voltage detection circuit, an anode of the capacitor C4 is connected with a pin IN2 of the phase shift chip U1, one end of the resistor R11 is connected with the pin IN1 of the phase shift chip U1, and the other end of the resistor R11 is connected with the protection circuit. The high-sensitivity mains supply monitoring system has the advantages that the mains supply monitoring system is high in sensitivity owing to the phase shift circuit and is high in response speed, and accordingly damage to electric equipment due to change of mains supply can be prevented.
Description
Technical field
The present invention relates to electronic applications, specifically refer to a kind of highly sensitive 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.Therefore people use civil power monitoring system to monitor the change of civil power usually at present, but the sensitivity of current civil power monitoring system is not high, can not monitor the change of civil power completely.
Summary of the invention
The object of the invention is to overcome the low defect of current civil power monitoring system sensitivity, a kind of civil power monitoring system of reacting fast high-sensitive degree is provided.
Object of the present invention is achieved through the following technical solutions: a kind of highly sensitive civil power monitoring system, by Comparison Circuit, the over-voltage detection circuit be simultaneously connected with Comparison Circuit and undervoltage detection circuit and phase-shift circuit, the protection circuit be connected with undervoltage detection circuit with over-voltage detection circuit, the trigger circuit be connected with protection circuit, and the oscillatory circuit be connected with trigger circuit forms, described phase-shift circuit is by phase shift chip U1, triode VT3, triode VT4, one end is connected with the VCC+ pin of phase shift chip U1, the resistance R12 that the other end is connected with the IN1 pin of phase shift chip U1, negative pole is connected with over-voltage detection circuit, the electric capacity C4 that positive pole is connected with the IN2 pin of phase shift chip U1, one end is connected with the IN1 pin of phase shift chip U1, the resistance R11 that the other end is connected with protection circuit, positive pole is connected with the NC pin of phase shift chip U1 after resistance R13, the electric capacity C6 that negative pole is connected with the collector of triode VT4, positive pole is connected with the OUT pin of phase shift chip U1, the electric capacity C5 of minus earth, one end is connected with the OUT pin of phase shift chip U1, the potentiometer R14 that the other end is connected with the positive pole of electric capacity C6, P pole is connected with the OFF1 pin of phase shift chip U1, the diode D7 that N pole is connected with the base stage of triode VT4, and P pole is connected with the OFF2 pin of phase shift chip U1, the diode D6 that N pole is connected with the emitter of triode VT3 forms, the IN1 pin of described phase shift chip U1 is connected with Comparison Circuit, VCC-pin ground connection, OFF2 pin are connected with oscillatory circuit, OUT pin is connected with the sliding end of potentiometer R4, the emitter of triode VT4 is connected with the base stage of triode VT3, and the collector of triode VT3 is as an output terminal of system.
Further, described Comparison Circuit by electric capacity C1, diode D1, resistance R3, potentiometer R1, and potentiometer R2 forms; The positive pole of electric capacity C1 is connected with the P pole of diode D1, minus earth, the P pole of diode D1 is connected with the IN1 pin of phase shift chip U1, its N pole is then connected with one end of resistance R3, one end of potentiometer R2 is connected with the other end of resistance R3, its other end is connected with undervoltage detection circuit, potentiometer R1 and potentiometer R2 is in parallel, the sliding end of potentiometer R1 is connected with over-voltage detection circuit, and the sliding end of potentiometer R2 is connected with undervoltage detection circuit.
Described over-voltage detection circuit is by resistance R5, and the first pilot lamp VL1, phase inverter P5, phase inverter P4, diode D3 form; One end of resistance R5 is connected with the negative pole of electric capacity C4, the other end is connected with the positive terminal of phase inverter P4 after the first pilot lamp VL1; the positive terminal of phase inverter P5 is connected with the sliding end of potentiometer R1, its end of oppisite phase is connected with the positive terminal of phase inverter P4, 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 P4.
Described undervoltage detection circuit comprises phase inverter P6, diode D2, the second pilot lamp VL2, resistance R4; The positive terminal of phase inverter P6 is connected with the sliding end of potentiometer R2, its end of oppisite phase is then connected with the tie point of potentiometer R1 and potentiometer R2 and protection circuit after resistance R4 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 P6, 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 resistance R11, 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 V1, the other end is connected with the N pole of diode D3, while the collector of triode VT1 is connected with trigger circuit, emitter is connected with the tie point of potentiometer R2 with resistance R4 after the normally closed contact K1 of relay K as an output terminal of system.
Described trigger circuit are by triode VT2, the resistance R7 that one end is connected with the base stage of triode VT2, the other end is connected with the collector of triode VT2 after potentiometer R9 through resistance R8, the electric capacity C2 that positive pole is connected with the tie point of resistance R8 with resistance R7, negative pole is connected with the collector of triode VT2 forms; The base stage of described triode VT2 is connected with the P pole of diode D4, its emitter is then connected with oscillatory circuit.
Described oscillatory circuit is by phase inverter P3, and diode D5, phase inverter P2, phase inverter P1, resistance R10, electric capacity C3, oscillator YD form; The N pole of diode D5 is connected with the end of oppisite phase of phase inverter P3, its P pole is then connected with the positive terminal of phase inverter P2, one end of resistance R10 is connected with the end of oppisite phase of phase inverter P2, the other end is then connected with the forward end of phase inverter P2, and electric capacity C3 positive pole is connected with the end of oppisite phase of phase inverter P1, negative pole is connected with the positive terminal of phase inverter P2; The positive terminal of described phase inverter P3 is connected with the emitter of triode VT2 and the P pole of diode D6 simultaneously, the end of oppisite phase of phase inverter P2 is connected with the positive terminal of phase inverter P1, and the end of oppisite phase of phase inverter P1 is connected with the emitter of triode VT1 after the normally closed contact K1 of relay K through oscillator YD.
Described phase shift chip U1 is LM741 integrated chip.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) phase-shift circuit of the present invention can make the sensitivity of civil power monitoring system higher, and reaction velocity is faster, avoids because city's Electrical change causes damage to consumer.
(2) 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.
(3) low cost of manufacture of the present invention, can be applied in life or commercial production.
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; highly sensitive civil power monitoring system of the present invention; by Comparison Circuit; the over-voltage detection circuit be simultaneously connected with Comparison Circuit and undervoltage detection circuit and phase-shift circuit; the protection circuit be connected with undervoltage detection circuit with over-voltage detection circuit; the trigger circuit be connected with protection circuit, and the oscillatory circuit be connected with trigger circuit forms.
Wherein, phase-shift circuit is emphasis of the present invention, it is by phase shift chip U1, triode VT3, triode VT4, one end is connected with the VCC+ pin of phase shift chip U1, the resistance R12 that the other end is connected with the IN1 pin of phase shift chip U1, negative pole is connected with over-voltage detection circuit, the electric capacity C4 that positive pole is connected with the IN2 pin of phase shift chip U1, one end is connected with the IN1 pin of phase shift chip U1, the resistance R11 that the other end is connected with protection circuit, positive pole is connected with the NC pin of phase shift chip U1 after resistance R13, the electric capacity C6 that negative pole is connected with the collector of triode VT4, positive pole is connected with the OUT pin of phase shift chip U1, the electric capacity C5 of minus earth, one end is connected with the OUT pin of phase shift chip U1, the potentiometer R14 that the other end is connected with the positive pole of electric capacity C6, P pole is connected with the OFF1 pin of phase shift chip U1, the diode D7 that N pole is connected with the base stage of triode VT4, and P pole is connected with the OFF2 pin of phase shift chip U1, the diode D6 that N pole is connected with the emitter of triode VT3 forms, the IN1 pin of described phase shift chip U1 is connected with Comparison Circuit, VCC-pin ground connection, OFF2 pin are connected with oscillatory circuit, OUT pin is connected with the sliding end of potentiometer R4, the emitter of triode VT4 is connected with the base stage of triode VT3, and the collector of triode VT3 is as an output terminal of system.Make the sensitivity of civil power monitoring system higher by the effect of phase-shift circuit, reaction velocity is faster, avoids consumer to be damaged because of city's Electrical change.In order to better implement the present invention, phase shift chip U1 elects LM741 integrated chip as.
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; The positive pole of electric capacity C1 is connected with the P pole of diode D1, minus earth, the P pole of diode D1 is connected with the IN1 pin of phase shift chip U1, its N pole is then connected with one end of resistance R3, one end of potentiometer R2 is connected with the other end of resistance R3, its other end is connected with undervoltage detection circuit, potentiometer R1 and potentiometer R2 is in parallel, the sliding end of potentiometer R1 is connected with over-voltage detection circuit, and the sliding end of potentiometer R2 is connected with undervoltage detection circuit.
Whether over-voltage detection circuit is too high for detecting line voltage, and it is by resistance R5, and the first pilot lamp VL1, phase inverter P5, phase inverter P4, diode D3 form; One end of resistance R5 is connected with the negative pole of electric capacity C4, the other end is connected with the positive terminal of phase inverter P4 after the first pilot lamp VL1; the positive terminal of phase inverter P5 is connected with the sliding end of potentiometer R1, its end of oppisite phase is connected with the positive terminal of phase inverter P4, 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 P4.
Whether undervoltage detection circuit is too low for detecting line voltage, and it comprises phase inverter P6, diode D2, the second pilot lamp VL2, resistance R4; The positive terminal of phase inverter P6 is connected with the sliding end of potentiometer R2, its end of oppisite phase is then connected with the tie point of potentiometer R1 and potentiometer R2 and protection circuit after resistance R4 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 P6, 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 resistance R11, 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 V1, the other end is connected with the N pole of diode D3, while the collector of triode VT1 is connected with trigger circuit, emitter is connected with the tie point of potentiometer R2 with resistance R4 after the normally closed contact K1 of relay K as an output terminal of system.
Described trigger circuit are by triode VT2, the resistance R7 that one end is connected with the base stage of triode VT2, the other end is connected with the collector of triode VT2 after potentiometer R9 through resistance R8, the electric capacity C2 that positive pole is connected with the tie point of resistance R8 with resistance R7, negative pole is connected with the collector of triode VT2 forms; The base stage of described triode VT2 is connected with the P pole of diode D4, its emitter is then connected with oscillatory circuit.
Described oscillatory circuit is by phase inverter P3, and diode D5, phase inverter P2, phase inverter P1, resistance R10, electric capacity C3, oscillator YD form; The N pole of diode D5 is connected with the end of oppisite phase of phase inverter P3, its P pole is then connected with the positive terminal of phase inverter P2, one end of resistance R10 is connected with the end of oppisite phase of phase inverter P2, the other end is then connected with the forward end of phase inverter P2, and electric capacity C3 positive pole is connected with the end of oppisite phase of phase inverter P1, negative pole is connected with the positive terminal of phase inverter P2; The positive terminal of described phase inverter P3 is connected with the emitter of triode VT2 and the P pole of diode D6 simultaneously, the end of oppisite phase of phase inverter P2 is connected with the positive terminal of phase inverter P1, and the end of oppisite phase of phase inverter P1 is connected with the emitter of triode VT1 after the normally closed contact K1 of relay K through oscillator YD.
As mentioned above, just well the present invention can be implemented.
Claims (8)
1. a highly sensitive civil power monitoring system, it is characterized in that: by Comparison Circuit, the over-voltage detection circuit be simultaneously connected with Comparison Circuit and undervoltage detection circuit and phase-shift circuit, the protection circuit be connected with undervoltage detection circuit with over-voltage detection circuit, the trigger circuit be connected with protection circuit, and the oscillatory circuit be connected with trigger circuit forms, described phase-shift circuit is by phase shift chip U1, triode VT3, triode VT4, one end is connected with the VCC+ pin of phase shift chip U1, the resistance R12 that the other end is connected with the IN1 pin of phase shift chip U1, negative pole is connected with over-voltage detection circuit, the electric capacity C4 that positive pole is connected with the IN2 pin of phase shift chip U1, one end is connected with the IN1 pin of phase shift chip U1, the resistance R11 that the other end is connected with protection circuit, positive pole is connected with the NC pin of phase shift chip U1 after resistance R13, the electric capacity C6 that negative pole is connected with the collector of triode VT4, positive pole is connected with the OUT pin of phase shift chip U1, the electric capacity C5 of minus earth, one end is connected with the OUT pin of phase shift chip U1, the potentiometer R14 that the other end is connected with the positive pole of electric capacity C6, P pole is connected with the OFF1 pin of phase shift chip U1, the diode D7 that N pole is connected with the base stage of triode VT4, and P pole is connected with the OFF2 pin of phase shift chip U1, the diode D6 that N pole is connected with the emitter of triode VT3 forms, the IN1 pin of described phase shift chip U1 is connected with Comparison Circuit, VCC-pin ground connection, OFF2 pin are connected with oscillatory circuit, OUT pin is connected with the sliding end of potentiometer R4, the emitter of triode VT4 is connected with the base stage of triode VT3, and the collector of triode VT3 is as an output terminal of system.
2. the highly sensitive civil power monitoring system of one 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; The positive pole of electric capacity C1 is connected with the P pole of diode D1, minus earth, the P pole of diode D1 is connected with the IN1 pin of phase shift chip U1, its N pole is then connected with one end of resistance R3, one end of potentiometer R2 is connected with the other end of resistance R3, its other end is connected with undervoltage detection circuit, potentiometer R1 and potentiometer R2 is in parallel, the sliding end of potentiometer R1 is connected with over-voltage detection circuit, and the sliding end of potentiometer R2 is connected with undervoltage detection circuit.
3. the highly sensitive civil power monitoring system of one according to claim 2, is characterized in that: described over-voltage detection circuit is by resistance R5, and the first pilot lamp VL1, phase inverter P5, phase inverter P4, diode D3 form; One end of resistance R5 is connected with the negative pole of electric capacity C4, the other end is connected with the positive terminal of phase inverter P4 after the first pilot lamp VL1; the positive terminal of phase inverter P5 is connected with the sliding end of potentiometer R1, its end of oppisite phase is connected with the positive terminal of phase inverter P4, 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 P4.
4. the highly sensitive civil power monitoring system of one according to claim 3, is characterized in that: described undervoltage detection circuit comprises phase inverter P6, diode D2, the second pilot lamp VL2, resistance R4; The positive terminal of phase inverter P6 is connected with the sliding end of potentiometer R2, its end of oppisite phase is then connected with the tie point of potentiometer R1 and potentiometer R2 and protection circuit after resistance R4 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 P6, its N pole is then connected with the N pole of diode D3.
5. the highly sensitive civil power monitoring system of one 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 resistance R11, 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 V1, the other end is connected with the N pole of diode D3, while the collector of triode VT1 is connected with trigger circuit, emitter is connected with the tie point of potentiometer R2 with resistance R4 after the normally closed contact K1 of relay K as an output terminal of system.
6. the highly sensitive civil power monitoring system of one according to claim 5, it is characterized in that: described trigger circuit are by triode VT2, the resistance R7 that one end is connected with the base stage of triode VT2, the other end is connected with the collector of triode VT2 after potentiometer R9 through resistance R8, the electric capacity C2 that positive pole is connected with the tie point of resistance R8 with resistance R7, negative pole is connected with the collector of triode VT2 forms; The base stage of described triode VT2 is connected with the P pole of diode D4, its emitter is then connected with oscillatory circuit.
7. the highly sensitive civil power monitoring system of one according to claim 6, is characterized in that: described oscillatory circuit is by phase inverter P3, and diode D5, phase inverter P2, phase inverter P1, resistance R10, electric capacity C3, oscillator YD form; The N pole of diode D5 is connected with the end of oppisite phase of phase inverter P3, its P pole is then connected with the positive terminal of phase inverter P2, one end of resistance R10 is connected with the end of oppisite phase of phase inverter P2, the other end is then connected with the forward end of phase inverter P2, and electric capacity C3 positive pole is connected with the end of oppisite phase of phase inverter P1, negative pole is connected with the positive terminal of phase inverter P2; The positive terminal of described phase inverter P3 is connected with the emitter of triode VT2 and the P pole of diode D6 simultaneously, the end of oppisite phase of phase inverter P2 is connected with the positive terminal of phase inverter P1, and the end of oppisite phase of phase inverter P1 is connected with the emitter of triode VT1 after the normally closed contact K1 of relay K through oscillator YD.
8. the highly sensitive civil power monitoring system of the one according to any one of claim 1 ~ 7, is characterized in that: described phase shift chip U1 is LM741 integrated chip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410693951.1A CN104407203A (en) | 2014-11-26 | 2014-11-26 | High-sensitivity mains supply monitoring system |
| CN201510321453.9A CN104868442A (en) | 2014-11-26 | 2015-06-07 | High-sensitivity commercial power monitoring system triggered by broad pulse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410693951.1A CN104407203A (en) | 2014-11-26 | 2014-11-26 | High-sensitivity mains supply monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN104407203A true CN104407203A (en) | 2015-03-11 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410693951.1A Pending CN104407203A (en) | 2014-11-26 | 2014-11-26 | High-sensitivity mains supply monitoring system |
| CN201510321453.9A Withdrawn CN104868442A (en) | 2014-11-26 | 2015-06-07 | High-sensitivity commercial power monitoring system triggered by broad pulse |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510321453.9A Withdrawn CN104868442A (en) | 2014-11-26 | 2015-06-07 | High-sensitivity commercial power monitoring system triggered by broad pulse |
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| CN (2) | CN104407203A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868442A (en) * | 2014-11-26 | 2015-08-26 | 成都冠深科技有限公司 | High-sensitivity commercial power monitoring system triggered by broad pulse |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407203A (en) * | 2014-11-26 | 2015-03-11 | 成都创图科技有限公司 | High-sensitivity mains supply monitoring system |
-
2014
- 2014-11-26 CN CN201410693951.1A patent/CN104407203A/en active Pending
-
2015
- 2015-06-07 CN CN201510321453.9A patent/CN104868442A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868442A (en) * | 2014-11-26 | 2015-08-26 | 成都冠深科技有限公司 | High-sensitivity commercial power monitoring system triggered by broad pulse |
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| Publication number | Publication date |
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| CN104868442A (en) | 2015-08-26 |
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Application publication date: 20150311 |