CN116626370A - Voltage alarm circuit of power monitoring system - Google Patents
Voltage alarm circuit of power monitoring system Download PDFInfo
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- CN116626370A CN116626370A CN202310876074.0A CN202310876074A CN116626370A CN 116626370 A CN116626370 A CN 116626370A CN 202310876074 A CN202310876074 A CN 202310876074A CN 116626370 A CN116626370 A CN 116626370A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 57
- 238000005070 sampling Methods 0.000 claims abstract description 65
- 238000001514 detection method Methods 0.000 claims abstract description 34
- 230000002159 abnormal effect Effects 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 52
- 239000003381 stabilizer Substances 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- 230000005856 abnormality Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/22—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of ac into dc
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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Abstract
The invention discloses a voltage alarm circuit of a power monitoring system, which relates to the field of voltage detection processing, and comprises: the voltage conversion module is used for converting the voltage to be monitored from alternating current into direct current; the voltage sampling output module is used for sampling the direct current to obtain a sampling voltage and outputting the sampling voltage to the voltage monitoring driving module; the reference power supply module is used for acquiring reference voltage and supplying the reference voltage to the voltage monitoring driving module; the voltage monitoring driving module is used for judging whether the sampling voltage is abnormal or not, and giving out a light indication when the sampling voltage is abnormal; the beneficial effects of the invention are as follows: the voltage monitoring driving module is arranged to detect whether the sampling voltage is abnormal or not, so that whether the voltage to be monitored is abnormal or not is judged, when the voltage to be monitored fluctuates, only the indication is emitted, and the alarm is not triggered; only when the continuous voltage is abnormal in a short time, the alarm can be triggered, and false alarm caused by external interference, environmental change and other reasons is avoided.
Description
Technical Field
The invention relates to the field of voltage detection processing, in particular to a voltage alarm circuit of a power monitoring system.
Background
The basic parameters of the electric power of the circuit in the electric power monitoring system must be monitored, so that huge potential safety hazards to terminals and users caused by out-of-control are avoided.
In the existing voltage detection circuit, when the voltage is higher or lower than a set value, a voltage alarm is triggered, and when a fluctuating voltage is detected, an alarm is started.
The method has the defects that voltage detection abnormality and alarm prompt are also caused when short-time voltage fluctuation is caused by external interference, environmental change and the like, and improvement is needed.
Disclosure of Invention
The invention aims to provide a voltage alarm circuit of a power monitoring system, which is used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a voltage alarm circuit of a power monitoring system, comprising:
the voltage conversion module is used for converting the voltage to be monitored from alternating current into direct current;
the voltage sampling output module is used for sampling the direct current to obtain a sampling voltage and outputting the sampling voltage to the voltage monitoring driving module;
the reference power supply module is used for acquiring reference voltage and supplying the reference voltage to the voltage monitoring driving module;
the voltage monitoring driving module is used for judging whether the sampling voltage is abnormal or not, and giving out a light indication when the sampling voltage is abnormal; continuously driving the alarm module to work abnormally;
the alarm module is used for alarming and ringing to prompt abnormal voltage to be monitored;
the output end of the voltage conversion module is connected with the input end of the voltage sampling output module and the input end of the reference power supply module, the output end of the voltage sampling output module is connected with the first input end of the voltage monitoring driving module, the output end of the reference power supply module is connected with the second input end of the voltage monitoring driving module, and the output end of the voltage monitoring driving module is connected with the input end of the alarm module.
As still further aspects of the invention: the voltage sampling module comprises a second resistor, a third capacitor, a second amplifier and a fourth resistor, wherein one end of the second resistor is connected with the output end of the voltage conversion module, the other end of the second resistor is connected with one end of the third resistor, one end of the third capacitor and the same-phase end of the second amplifier, the other end of the third capacitor is grounded, the other end of the third resistor is grounded, the opposite-phase end of the second amplifier is connected with one end of the fourth resistor, and the other end of the fourth resistor is connected with the output end of the second amplifier and the first input end of the voltage monitoring driving module.
As still further aspects of the invention: the reference power supply module comprises a first resistor, a first capacitor, a voltage stabilizer and a second capacitor, wherein one end of the first resistor is connected with the output end of the voltage conversion module, the other end of the first resistor is grounded, the grounding of the voltage stabilizer is grounded, the output end of the voltage stabilizer is connected with one end of the second capacitor and the second input end of the voltage monitoring driving module, and the other end of the second capacitor is grounded.
As still further aspects of the invention: the voltage monitoring driving module includes:
the detection driving circuit is used for detecting whether the sampling voltage is abnormal or not, and driving the trigger indicating circuit to work when the sampling voltage is abnormal; when the continuous abnormality occurs, the alarm module is driven to work;
the trigger indication circuit is used for indicating that the voltage to be monitored is abnormal in a luminous manner during operation;
the bleeder circuit is used for bleeder when the sampling voltage is normal and stopping bleeder when the sampling voltage is abnormal;
the first input end of the detection driving circuit is connected with the output end of the voltage sampling output module, the second input end of the detection driving circuit is connected with the output end of the reference power supply module, the first output end of the detection driving circuit is connected with the alarm module, the second output end of the detection driving circuit is connected with the input end of the trigger indicating circuit and the first input end of the bleeder circuit, and the third output end of the detection driving circuit is connected with the second input end of the bleeder circuit.
As still further aspects of the invention: the detection driving circuit comprises a third amplifier, a fifth resistor, a first potentiometer, a fourth capacitor and a second MOS tube, wherein the in-phase end of the third amplifier is connected with the output end of the voltage sampling output module, the inverting end of the third amplifier is connected with the output end of the reference power supply module, the output end of the third amplifier is connected with one end of the fifth resistor, the input end of the trigger indicating circuit and the first input end of the bleeder circuit, the other end of the fifth resistor is connected with one end of the first potentiometer, the other end of the first potentiometer is connected with the second input end of the bleeder circuit, one end of the fourth capacitor and the G electrode of the second MOS tube, the other end of the fourth capacitor is grounded, the D electrode of the second MOS tube is connected with the output end of the reference power supply module, and the S electrode of the second MOS tube is connected with the input end of the alarm module.
As still further aspects of the invention: the trigger indication circuit comprises a silicon controlled rectifier and a first diode, wherein the positive electrode of the silicon controlled rectifier is connected with the output end of the reference power supply module, the negative electrode of the silicon controlled rectifier is connected with the positive electrode of the first diode, the negative electrode of the first diode is grounded, and the control electrode of the silicon controlled rectifier is connected with the second output end of the detection driving circuit.
As still further aspects of the invention: the bleeder circuit includes first MOS pipe, sixth resistance, and the third output of detection drive circuit is connected to the one end of sixth resistance, and the S utmost point of first MOS pipe is connected to the other end of sixth resistance, and the D utmost point of first MOS pipe is earthed, and the second output of detection drive circuit is connected to the G utmost point of first MOS pipe.
As still further aspects of the invention: the alarm module comprises a seventh resistor, an eighth resistor, a third triode, a fourth triode, a fifth capacitor and a loudspeaker, wherein one end of the seventh resistor is connected with an emitter of the fourth triode and an output end of the voltage monitoring driving module, the other end of the seventh resistor is connected with one end of the eighth resistor and a base electrode of the third triode, the emitter of the third triode is grounded, a collector of the third triode is connected with the base electrode of the fourth triode, the other end of the eighth resistor is connected with one end of the fifth capacitor, the other end of the fifth capacitor is connected with a collector of the fourth triode and one end of the loudspeaker, and the other end of the loudspeaker is grounded.
Compared with the prior art, the invention has the beneficial effects that: the voltage monitoring driving module is arranged to detect whether the sampling voltage is abnormal or not, so that whether the voltage to be monitored is abnormal or not is judged, when the voltage to be monitored fluctuates, only the indication is emitted, and the alarm is not triggered; only when the continuous voltage is abnormal in a short time, the alarm can be triggered, and false alarm caused by external interference, environmental change and other reasons is avoided.
Drawings
Fig. 1 is a schematic diagram of a voltage alarm circuit of a power monitoring system.
Fig. 2 is a circuit diagram of the voltage conversion module.
Fig. 3 is a circuit diagram of a reference power module.
Fig. 4 is a circuit diagram of a voltage sampling output module and a voltage monitoring drive module.
Fig. 5 is a circuit diagram of an alarm module.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are included in the protection scope of the present invention.
Referring to fig. 1, a voltage alarm circuit of a power monitoring system includes:
the voltage conversion module 1 is used for converting the voltage to be monitored from alternating current into direct current;
the voltage sampling output module 2 is used for sampling the direct current to obtain a sampling voltage and outputting the sampling voltage to the voltage monitoring driving module 4;
a reference power supply module 3 for acquiring a reference voltage VREF and supplying the reference voltage VREF to the voltage monitoring driving module 4;
the voltage monitoring driving module 4 is used for judging whether the sampling voltage is abnormal or not, and giving out a light indication when the sampling voltage is abnormal; continuously driving the alarm module 5 to work abnormally;
the alarm module 5 is used for alarming and ringing to prompt abnormal voltage to be monitored;
the output end of the voltage conversion module 1 is connected with the input end of the voltage sampling output module 2 and the input end of the reference power supply module 3, the output end of the voltage sampling output module 2 is connected with the first input end of the voltage monitoring driving module 4, the output end of the reference power supply module 3 is connected with the second input end of the voltage monitoring driving module 4, and the output end of the voltage monitoring driving module 4 is connected with the input end of the alarm module 5.
In particular embodiments: referring to fig. 2, the voltage conversion module 1 includes a transformer W, a rectifier T, a seventh capacitor C7, a sixth capacitor C6, and an inductor L1, the voltage of the voltage to be monitored (ac) is reduced by the transformer W, the ac is converted into dc by the rectifier T, and the dc is filtered by a filter circuit formed by the seventh capacitor C7, the sixth capacitor C6, and the inductor L1, so as to obtain a converted voltage VCC.
In this embodiment: referring to fig. 4, the voltage sampling module includes a second resistor R2, a third resistor R3, a third capacitor C3, a second amplifier U2, and a fourth resistor R4, wherein one end of the second resistor R2 is connected to the output end of the voltage conversion module 1, the other end of the second resistor R2 is connected to one end of the third resistor R3, one end of the third capacitor C3, and the same phase end of the second amplifier U2, the other end of the third capacitor C3 is grounded, the other end of the third resistor R3 is grounded, the inverting end of the second amplifier U2 is connected to one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to the output end of the second amplifier U2 and the first input end of the voltage monitoring driving module 4.
The conversion voltage VCC is the sum of the voltages of the second resistor R2 and the third resistor R3, the third resistor R3 is taken as the sampling voltage, and the sampling voltage is output after passing through the second amplifier U2, and the second amplifier U2 is taken as a follower to reduce the interference.
In another embodiment: the second resistor R2 can be exchanged for a potentiometer so that the duty cycle of the sampling voltage in the switching voltage VCC can be adjusted.
In this embodiment: referring to fig. 3, the reference power supply module 3 includes a first resistor R1, a first capacitor C1, a voltage stabilizer U1, and a second capacitor C2, wherein one end of the first resistor R1 is connected to the output end of the voltage conversion module 1, the power consumption of the first resistor R1 is connected to one end of the first capacitor C1 and the input end of the voltage stabilizer U1, the other end of the first capacitor C1 is grounded, the ground of the voltage stabilizer U1 is grounded, the output end of the voltage stabilizer U1 is connected to one end of the second capacitor C2 and the second input end of the voltage monitoring driving module 4, and the other end of the second capacitor C2 is grounded.
After the voltage passes through the voltage regulator U1, a stable voltage is output and supplied as a reference voltage VREF to the voltage monitor driving module 4.
In another embodiment: a stable voltage may also be obtained by a zener diode.
In this embodiment: referring to fig. 4, the voltage monitoring driving module 4 includes:
the detection driving circuit is used for detecting whether the sampling voltage is abnormal or not, and driving the trigger indicating circuit to work when the sampling voltage is abnormal; when the continuous abnormality occurs, the alarm module 5 is driven to work;
the trigger indication circuit is used for indicating that the voltage to be monitored is abnormal in a luminous manner during operation;
the bleeder circuit is used for bleeder when the sampling voltage is normal and stopping bleeder when the sampling voltage is abnormal;
the first input end of the detection driving circuit is connected with the output end of the voltage sampling output module 2, the second input end of the detection driving circuit is connected with the output end of the reference power supply module 3, the first output end of the detection driving circuit is connected with the alarm module 5, the second output end of the detection driving circuit is connected with the input end of the trigger indicating circuit and the first input end of the bleeder circuit, and the third output end of the detection driving circuit is connected with the second input end of the bleeder circuit.
In this embodiment: referring to fig. 4, the detection driving circuit includes a third amplifier U3, a fifth resistor R5, a first potentiometer RP1, a fourth capacitor C4, and a second MOS tube V2, where the in-phase end of the third amplifier U3 is connected to the output end of the voltage sampling output module 2, the opposite-phase end of the third amplifier U3 is connected to the output end of the reference power supply module 3, the output end of the third amplifier U3 is connected to one end of the fifth resistor R5, the input end of the trigger indication circuit, and the first input end of the bleeder circuit, the other end of the fifth resistor R5 is connected to one end of the first potentiometer RP1, the other end of the first potentiometer RP1 is connected to the second input end of the bleeder circuit, one end of the fourth capacitor C4, the G pole of the second MOS tube V2, the other end of the fourth capacitor C4 is grounded, the D pole of the second MOS tube V2 is connected to the output end of the reference power supply module 3, and the S pole of the second MOS tube V2 is connected to the input end of the alarm module 5.
The third amplifier U3 is used as a comparator, and when the sampling voltage is greater than the reference voltage VREF (the voltage to be monitored is abnormally greater and is higher than the upper threshold), the third amplifier U3 outputs a high level to charge the fourth capacitor C4 through the fifth resistor R5 and the first potentiometer RP1, and when the fourth capacitor C4 is charged enough to turn on the second MOS transistor V2, the alarm module 5 is driven to operate.
In another embodiment: the non-inverting terminal and the inverting terminal of the third amplifier U3 can be connected and interchanged, and then the output terminal of the third amplifier U3 is connected with an inverter, so that whether the voltage to be monitored is smaller or not can be detected, and the voltage to be monitored is lower than a lower limit threshold value.
In this embodiment: referring to fig. 4, the trigger indication circuit includes a thyristor Z1 and a first diode D1, wherein a positive electrode of the thyristor Z1 is connected to an output end of the reference power supply module 3, a negative electrode of the thyristor Z1 is connected to a positive electrode of the first diode D1, a negative electrode of the first diode D1 is grounded, and a control electrode of the thyristor Z1 is connected to a second output end of the detection driving circuit.
When the sampling voltage is greater than the reference voltage VREF, the third amplifier U3 outputs a high level, and at the moment, the controllable silicon Z1 is directly driven to be conducted, and the first diode D1 is used as a light emitting diode to emit light to indicate that voltage fluctuation exists in the voltage to be monitored.
In another embodiment: the reference voltage VREF is used as a power supply herein, and other voltages may be used as power supplies.
In this embodiment: referring to fig. 4, the bleeder circuit includes a first MOS transistor V1 and a sixth resistor R6, wherein one end of the sixth resistor R6 is connected to the third output end of the detection driving circuit, the other end of the sixth resistor R6 is connected to the S pole of the first MOS transistor V1, the D pole of the first MOS transistor V1 is grounded, and the G pole of the first MOS transistor V1 is connected to the second output end of the detection driving circuit.
When the monitored voltage fluctuates, the third amplifier U3 outputs a high level to charge the fourth capacitor C4, at this time, the first MOS tube V1 (PMOS) is cut off, when the monitored voltage stops fluctuating, the third amplifier U3 outputs a low level, the first MOS tube V1 is conducted to discharge the electric energy stored in the fourth capacitor C4, therefore, only in a short time, the voltage fluctuation time to be monitored is far longer than the voltage fluctuation stopping time, the voltage on the fourth capacitor C4 is enough to conduct the alarm module 5, and the error alarm caused by external interference, environmental change and other reasons is avoided.
In another embodiment: the sixth resistor R6 can be replaced by a potentiometer, and the speed of the fourth capacitor C4 when discharging can be changed by adjusting the resistance of the potentiometer.
In this embodiment: referring to fig. 5, the alarm module 5 includes a seventh resistor R7, an eighth resistor R8, a third triode V3, a fourth triode V4, a fifth capacitor C5, and a SPEAKER peak, wherein one end of the seventh resistor R7 is connected to an emitter of the fourth triode V4 and an output end of the voltage monitoring driving module 4, the other end of the seventh resistor R7 is connected to one end of the eighth resistor R8 and a base of the third triode V3, an emitter of the third triode V3 is grounded, a collector of the third triode V3 is connected to a base of the fourth triode V4, the other end of the eighth resistor R8 is connected to one end of the fifth capacitor C5, the other end of the fifth capacitor C5 is connected to a collector of the fourth triode V4 and one end of the SPEAKER peak, and the other end of the SPEAKER peak is grounded.
After the second MOS tube V2 is conducted, the third triode V3 is conducted, and then the fourth triode V4 is triggered to conduct, so that an oscillating signal appears at the fifth capacitor C5 to trigger a SPEAKER SPEAKER to alarm. The user is prompted that the voltage to be monitored is abnormal.
In another embodiment: the alarm module 5 can be replaced by a voice chip and other devices to complete voice alarm.
The working principle of the invention is as follows: the voltage conversion module 1 is used for converting the voltage to be monitored from alternating current into direct current; the voltage sampling output module 2 is used for sampling direct current to obtain sampling voltage and outputting the sampling voltage to the voltage monitoring driving module 4; the reference power supply module 3 is used for acquiring a reference voltage VREF and supplying the reference voltage VREF to the voltage monitoring driving module 4; the voltage monitoring driving module 4 is used for judging whether the sampling voltage is abnormal or not, and giving out a light indication when the sampling voltage is abnormal; continuously driving the alarm module 5 to work abnormally; the alarm module 5 is used for alarming and ringing to prompt that the voltage to be monitored is abnormal.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (8)
1. A voltage alarm circuit of a power monitoring system, comprising:
the voltage conversion module is used for converting the voltage to be monitored from alternating current into direct current;
the voltage sampling output module is used for sampling the direct current to obtain a sampling voltage and outputting the sampling voltage to the voltage monitoring driving module;
the reference power supply module is used for acquiring reference voltage and supplying the reference voltage to the voltage monitoring driving module;
the method is characterized in that: the voltage alarm circuit of the power monitoring system further comprises:
the voltage monitoring driving module is used for judging whether the sampling voltage is abnormal or not, and giving out a light indication when the sampling voltage is abnormal; continuously driving the alarm module to work abnormally;
the alarm module is used for alarming and ringing to prompt abnormal voltage to be monitored;
the output end of the voltage conversion module is connected with the input end of the voltage sampling output module and the input end of the reference power supply module, the output end of the voltage sampling output module is connected with the first input end of the voltage monitoring driving module, the output end of the reference power supply module is connected with the second input end of the voltage monitoring driving module, and the output end of the voltage monitoring driving module is connected with the input end of the alarm module.
2. The voltage alarm circuit of the power monitoring system according to claim 1, wherein the voltage sampling module comprises a second resistor, a third capacitor, a second amplifier and a fourth resistor, one end of the second resistor is connected with the output end of the voltage conversion module, the other end of the second resistor is connected with one end of the third resistor, one end of the third capacitor and the same-phase end of the second amplifier, the other end of the third capacitor is grounded, the other end of the third resistor is grounded, the opposite-phase end of the second amplifier is connected with one end of the fourth resistor, and the other end of the fourth resistor is connected with the output end of the second amplifier and the first input end of the voltage monitoring driving module.
3. The voltage alarm circuit of the power monitoring system according to claim 1, wherein the reference power supply module comprises a first resistor, a first capacitor, a voltage stabilizer and a second capacitor, one end of the first resistor is connected with the output end of the voltage conversion module, the other end of the first resistor is grounded, the ground of the voltage stabilizer is grounded, the output end of the voltage stabilizer is connected with one end of the second capacitor and the second input end of the voltage monitoring driving module, and the other end of the second capacitor is grounded.
4. The voltage alarm circuit of a power monitoring system of claim 1, wherein the voltage monitoring drive module comprises:
the detection driving circuit is used for detecting whether the sampling voltage is abnormal or not, and driving the trigger indicating circuit to work when the sampling voltage is abnormal; when the continuous abnormality occurs, the alarm module is driven to work;
the trigger indication circuit is used for indicating that the voltage to be monitored is abnormal in a luminous manner during operation;
the bleeder circuit is used for bleeder when the sampling voltage is normal and stopping bleeder when the sampling voltage is abnormal;
the first input end of the detection driving circuit is connected with the output end of the voltage sampling output module, the second input end of the detection driving circuit is connected with the output end of the reference power supply module, the first output end of the detection driving circuit is connected with the alarm module, the second output end of the detection driving circuit is connected with the input end of the trigger indicating circuit and the first input end of the bleeder circuit, and the third output end of the detection driving circuit is connected with the second input end of the bleeder circuit.
5. The voltage alarm circuit of the power monitoring system according to claim 4, wherein the detection driving circuit comprises a third amplifier, a fifth resistor, a first potentiometer, a fourth capacitor and a second MOS tube, the in-phase end of the third amplifier is connected with the output end of the voltage sampling output module, the inverting end of the third amplifier is connected with the output end of the reference power supply module, the output end of the third amplifier is connected with one end of the fifth resistor, the input end of the trigger indicating circuit and the first input end of the bleeder circuit, the other end of the fifth resistor is connected with one end of the first potentiometer, the other end of the first potentiometer is connected with the second input end of the bleeder circuit, one end of the fourth capacitor and the G electrode of the second MOS tube, the other end of the fourth capacitor is grounded, the D electrode of the second MOS tube is connected with the output end of the reference power supply module, and the S electrode of the second MOS tube is connected with the input end of the alarm module.
6. The voltage alarm circuit of the power monitoring system according to claim 4, wherein the trigger indication circuit comprises a silicon controlled rectifier and a first diode, wherein the positive electrode of the silicon controlled rectifier is connected with the output end of the reference power supply module, the negative electrode of the silicon controlled rectifier is connected with the positive electrode of the first diode, the negative electrode of the first diode is grounded, and the control electrode of the silicon controlled rectifier is connected with the second output end of the detection driving circuit.
7. The voltage alarm circuit of the power monitoring system according to claim 4 or 5, wherein the bleeder circuit comprises a first MOS tube and a sixth resistor, one end of the sixth resistor is connected to the third output end of the detection driving circuit, the other end of the sixth resistor is connected to the S pole of the first MOS tube, the D pole of the first MOS tube is grounded, and the G pole of the first MOS tube is connected to the second output end of the detection driving circuit.
8. The voltage alarm circuit of the power monitoring system according to claim 1, wherein the alarm module comprises a seventh resistor, an eighth resistor, a third triode, a fourth triode, a fifth capacitor and a loudspeaker, one end of the seventh resistor is connected with an emitter of the fourth triode and an output end of the voltage monitoring driving module, the other end of the seventh resistor is connected with one end of the eighth resistor and a base of the third triode, the emitter of the third triode is grounded, a collector of the third triode is connected with a base of the fourth triode, the other end of the eighth resistor is connected with one end of the fifth capacitor, the other end of the fifth capacitor is connected with a collector of the fourth triode and one end of the loudspeaker, and the other end of the loudspeaker is grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310876074.0A CN116626370A (en) | 2023-07-18 | 2023-07-18 | Voltage alarm circuit of power monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310876074.0A CN116626370A (en) | 2023-07-18 | 2023-07-18 | Voltage alarm circuit of power monitoring system |
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| CN116626370A true CN116626370A (en) | 2023-08-22 |
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| CN202310876074.0A Withdrawn CN116626370A (en) | 2023-07-18 | 2023-07-18 | Voltage alarm circuit of power monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116937817A (en) * | 2023-09-18 | 2023-10-24 | 深圳鹏锐信息技术股份有限公司 | Data monitoring system of photovoltaic power station |
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| CN102944730A (en) * | 2012-11-05 | 2013-02-27 | 深圳创维－Rgb电子有限公司 | Automatic detection device for voltage abnormal state |
| CN217954551U (en) * | 2022-03-29 | 2022-12-02 | 国网河南省电力公司商丘供电公司 | Power grid under-voltage and over-voltage alarm circuit |
| CN115184724A (en) * | 2022-06-29 | 2022-10-14 | 南通通成自动化技术有限公司 | Join in marriage abnormal voltage detection circuit of electrical room |
| CN218070994U (en) * | 2022-09-07 | 2022-12-16 | 上海爱瑞德股份有限公司 | Low-voltage early warning protector circuit |
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| CN116937817A (en) * | 2023-09-18 | 2023-10-24 | 深圳鹏锐信息技术股份有限公司 | Data monitoring system of photovoltaic power station |
| CN116937817B (en) * | 2023-09-18 | 2024-01-16 | 深圳鹏锐信息技术股份有限公司 | Data monitoring system of photovoltaic power station |
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Application publication date: 20230822 |