CN116679118A - Power voltage monitoring device - Google Patents

Power voltage monitoring device Download PDF

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Publication number
CN116679118A
CN116679118A CN202310654049.8A CN202310654049A CN116679118A CN 116679118 A CN116679118 A CN 116679118A CN 202310654049 A CN202310654049 A CN 202310654049A CN 116679118 A CN116679118 A CN 116679118A
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CN
China
Prior art keywords
voltage
module
resistor
capacitor
sampling
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Pending
Application number
CN202310654049.8A
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Chinese (zh)
Inventor
刘崇高
刘仁忠
李芳华
王艳兵
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Hunan Huali Electric Technology Co ltd
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Hunan Huali Electric Technology Co ltd
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Application filed by Hunan Huali Electric Technology Co ltd filed Critical Hunan Huali Electric Technology Co ltd
Priority to CN202310654049.8A priority Critical patent/CN116679118A/en
Publication of CN116679118A publication Critical patent/CN116679118A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies

Abstract

The invention discloses a power voltage monitoring device, which relates to the field of voltage detection, and comprises: the mains supply module is used for supplying mains voltage and outputting the mains voltage to the voltage acquisition module and the household power module; the voltage acquisition module is used for acquiring the voltage of the mains supply and outputting the voltage to the voltage sampling module; the voltage sampling module is used for acquiring sampling voltage and supplying the sampling voltage to the voltage detection driving module and the emergency protection module; the beneficial effects of the invention are as follows: according to the invention, the delay module is arranged, when the power grid voltage exceeds the normal voltage, the prompt protection module is driven to finish voice prompt and power failure only after the power grid voltage continuously exceeds one end of time, so that the influence of power failure on household power utilization when the power grid voltage exceeds the normal voltage occasionally is avoided; the household power supply system is provided with an emergency protection module, and when the voltage of the power grid is overlarge due to voltage abnormality, the emergency protection module can be directly driven to prompt the protection module to finish household power protection, so that the household appliances with large voltage loss are avoided.

Description

Power voltage monitoring device
Technical Field
The invention relates to the field of voltage detection, in particular to a power voltage monitoring device.
Background
At present, household electricity is often provided with an electric switch, and when the voltage of a power grid is abnormal, household power supply can be automatically disconnected, so that household appliances are prevented from being failed due to abnormal voltage.
When the power grid supplies power normally, the working voltage of the electric appliance is rated voltage, the working voltage of the electric appliance is slightly higher than the rated voltage in a short time and does not reach the peak voltage of the electric appliance, the electric appliance cannot be damaged, the conventional electric switch is directly powered off, the household electricity utilization experience is poor, and improvement is needed.
Disclosure of Invention
The present invention is directed to a power voltage monitoring device, which solves the above-mentioned problems.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a power voltage monitoring device, comprising:
the mains supply module is used for supplying mains voltage and outputting the mains voltage to the voltage acquisition module and the household power module;
the voltage acquisition module is used for acquiring the voltage of the mains supply and outputting the voltage to the voltage sampling module;
the voltage sampling module is used for acquiring sampling voltage and supplying the sampling voltage to the voltage detection driving module and the emergency protection module;
the voltage detection driving module is used for detecting whether the sampling voltage is normal or not, and providing voltage for the delay module when the sampling voltage is normal; stopping providing the voltage to the delay module when the first threshold is exceeded;
the delay module is used for judging whether the prompt protection module is driven to work according to the voltage supply condition of the voltage detection driving module;
the prompt protection module is used for ringing to prompt a user and disconnecting the loops of the household power module and the mains supply module;
the household electricity utilization module is used for enabling household appliances to be electrified;
the emergency protection module is used for detecting whether the sampling voltage exceeds a second threshold value or not, and directly driving the prompt protection module to work when the sampling voltage exceeds the second threshold value;
the output end of the mains supply module is connected with the input end of the voltage acquisition module and the first input end of the household power module, the output end of the voltage acquisition module is connected with the input end of the voltage sampling module, the output end of the voltage sampling module is connected with the input end of the voltage detection driving module and the input end of the emergency protection module, the output end of the voltage detection driving module is connected with the input end of the delay module, the output end of the delay module is connected with the input end of the prompt protection module, the output end of the emergency protection module is connected with the input end of the prompt protection module, and the output end of the prompt protection module is connected with the second input end of the household power module.
As still further aspects of the invention: the voltage acquisition module comprises a transformer, a first diode and a first capacitor, one end of the transformer is connected with the positive electrode of the first diode, the other end of the transformer is grounded, the negative electrode of the first diode is connected with one end of the first capacitor, the input end of the voltage sampling module is grounded, and the other end of the first capacitor is grounded.
As still further aspects of the invention: the voltage sampling module comprises a first potentiometer, a first resistor, a controllable precise voltage stabilizing source, a second capacitor, a voltmeter and a second resistor, wherein one end of the potentiometer is connected with the output end of the voltage acquisition module and the negative electrode of the controllable precise voltage stabilizing source, the other end of the potentiometer is connected with one end of the first resistor and the reference electrode of the controllable precise voltage stabilizing source, the other end of the first resistor is connected with the positive electrode of the controllable precise voltage stabilizing source, one end of the second capacitor, one end of the voltmeter, one end of the second resistor, the input end of the voltage detection driving module and the input end of the emergency protection module, the other end of the second capacitor is grounded, the other end of the voltmeter is grounded, and the other end of the second resistor is grounded.
As still further aspects of the invention: the voltage detection driving module comprises a third resistor, a third capacitor, a first triode, a fourth resistor, a fifth resistor, a fourth capacitor, a second triode and a sixth resistor, wherein one end of the third resistor is connected with the output end of the voltage sampling module, the other end of the third resistor is connected with one end of the third capacitor and the base of the first triode, the other end of the third capacitor is grounded, the collector of the first triode is connected with one end of the fourth resistor and the base of the second triode, the other end of the fourth resistor is grounded, the emitter of the first triode is connected with one end of the fourth capacitor and one end of the fifth resistor, the other end of the fourth capacitor is grounded, the other end of the fifth resistor is connected with a power supply voltage, the collector of the second triode is connected with one end of the sixth resistor, the other end of the sixth resistor is connected with the power supply voltage, and the emitter of the second triode is connected with the input end of the delay module.
As still further aspects of the invention: the delay module comprises a seventh resistor, an eighth resistor, a fifth capacitor, a third MOS tube and a silicon controlled rectifier, wherein one end of the seventh resistor is connected with the output end of the voltage detection driving module, the other end of the seventh resistor is connected with one end of the eighth resistor, one end of the fifth capacitor and the G pole of the third MOS tube, the other end of the fifth capacitor is grounded, the other end of the eighth resistor is connected with the control pole of the silicon controlled rectifier, the positive pole of the silicon controlled rectifier is connected with the power supply voltage, the negative pole of the silicon controlled rectifier is connected with the S pole of the third MOS tube, and the D pole of the third MOS tube is connected with the input end of the prompt protection module.
As still further aspects of the invention: the prompt protection module comprises a relay, a second diode and a loudspeaker, wherein one end of the relay is connected with one end of the loudspeaker, the negative electrode of the second diode, the output end of the delay module and the output end of the emergency protection module, the other end of the relay is grounded, the positive electrode of the second diode is grounded, and the other end of the loudspeaker is grounded.
As still further aspects of the invention: the emergency protection module comprises a ninth resistor, a third diode and a fourth diode, one end of the ninth resistor is connected with the output end of the voltage sampling module, the other end of the ninth resistor is connected with the negative electrode of the third diode, the positive electrode of the third diode is connected with the positive electrode of the fourth diode, and the negative electrode of the fourth diode is connected with the input end of the prompt protection module.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the delay module is arranged, when the power grid voltage (mains voltage) exceeds the normal voltage, the prompt protection module is driven to finish voice prompt and power failure only after the power grid voltage exceeds one end of time, so that the influence of power failure on household electricity when the power grid voltage exceeds the normal voltage occasionally is avoided; the household power supply system is provided with an emergency protection module, and when the voltage of the power grid is overlarge due to voltage abnormality, the emergency protection module can be directly driven to prompt the protection module to finish household power protection, so that the household appliances with large voltage loss are avoided.
Drawings
Fig. 1 is a schematic diagram of a power voltage monitoring device.
Fig. 2 is a circuit diagram of a power voltage monitoring device.
Fig. 3 is a circuit diagram of the hint protection module.
Fig. 4 is a circuit diagram of the emergency protection 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 power voltage monitoring device includes:
the mains supply module 1 is used for supplying mains voltage and outputting the mains voltage to the voltage acquisition module 2 and the household power module 7;
the voltage acquisition module 2 is used for acquiring the voltage of the mains supply and outputting the voltage to the voltage sampling module 3;
the voltage sampling module 3 is used for acquiring sampling voltage and supplying the sampling voltage to the voltage detection driving module 4 and the emergency protection module 8;
the voltage detection driving module 4 is used for detecting whether the sampling voltage is normal or not, and providing voltage for the delay module 5 when the sampling voltage is normal; stopping the supply of voltage to the delay module 5 when the first threshold is exceeded;
the delay module 5 is used for judging whether the prompt protection module 6 is driven to work according to the voltage supply condition of the voltage detection driving module 4;
the prompt protection module 6 is used for ringing to prompt a user and disconnecting the loop of the household power module 7 and the mains power module 1;
the household electricity utilization module 7 is used for electrically obtaining household appliances;
the emergency protection module 8 is configured to detect whether the sampling voltage exceeds a second threshold, and directly drive the prompt protection module 6 to work when the sampling voltage exceeds the second threshold;
the output end of the mains supply module 1 is connected with the input end of the voltage acquisition module 2 and the first input end of the household power module 7, the output end of the voltage acquisition module 2 is connected with the input end of the voltage sampling module 3, the output end of the voltage sampling module 3 is connected with the input end of the voltage detection driving module 4 and the input end of the emergency protection module 8, the output end of the voltage detection driving module 4 is connected with the input end of the delay module 5, the output end of the delay module 5 is connected with the input end of the prompt protection module 6, the output end of the emergency protection module 8 is connected with the input end of the prompt protection module 6, and the output end of the prompt protection module 6 is connected with the second input end of the household power module 7.
In particular embodiments: referring to fig. 2, a mains power module 1 is composed of a live wire L and a neutral wire N for introducing a mains voltage; the module of the household user comprises a first switch S1, a second switch S2 and a household electric load (household appliance), and the mains supply supplies power to the household electric load through the first switch S1 and the second switch S2.
In this embodiment: referring to fig. 2, the voltage acquisition module 2 includes a transformer X, a first diode D1, and a first capacitor C1, wherein one end of the transformer X is connected to the positive electrode of the first diode D1, the other end of the transformer X is grounded, the negative electrode of the first diode D1 is connected to one end of the first capacitor C1, the input end of the voltage sampling module 3 is grounded, and the other end of the first capacitor C1 is grounded.
The transformer X collects the mains voltage, and the mains voltage is rectified by the first diode D1 and filtered by the first capacitor C1 and then is output to the voltage sampling module 3.
In another embodiment: the mains voltage can also be collected through devices such as transformers.
In this embodiment: referring to fig. 2, the voltage sampling module 3 includes a first potentiometer RP1, a first resistor R1, a controllable precise voltage stabilizing source Z1, a second capacitor C2, a voltmeter V, and a second resistor R2, wherein one end of the potentiometer RP1 is connected to an output end of the voltage collecting module 2 and a negative electrode of the controllable precise voltage stabilizing source Z1, the other end of the potentiometer RP1 is connected to one end of the first resistor R1 and a reference electrode of the controllable precise voltage stabilizing source Z1, the other end of the first resistor R1 is connected to an anode of the controllable precise voltage stabilizing source Z1, one end of the second capacitor C2, one end of the voltmeter V, one end of the second resistor R2, an input end of the voltage detection driving module 4, and an input end of the emergency protection module 8, the other end of the second capacitor C2 is grounded, the other end of the voltmeter V is grounded, and the other end of the second resistor R2 is grounded.
The collected mains voltage is the sum of the voltages on the first potentiometer RP1, the first resistor R1 and the second resistor R2, the voltage between the reference electrode and the positive electrode of the controllable precise voltage stabilizing source Z1 (the model can be TL 431) is fixed, the first potentiometer RP1, the first resistor R1 and the controllable precise voltage stabilizing source Z1 are connected in parallel, so that the voltages on the first potentiometer RP1 and the first resistor R1 are fixed, and the voltage on the controllable precise voltage stabilizing source Z1 can be changed by adjusting the resistance value of the first potentiometer RP 1; the second resistor R2 is a sampling resistor, and the voltage thereon changes with the change of the mains voltage. The voltage meter V can observe the sampling voltage, so as to reflect the voltage of the commercial power.
In another embodiment: the first potentiometer RP1 can be replaced by a common resistor, so that the voltage on the controllable precision voltage stabilizing source Z1 cannot be adjusted.
In this embodiment: referring to fig. 2, the voltage detection driving module 4 includes a third resistor R3, a third capacitor C3, a first triode V1, a fourth resistor R4, a fifth resistor R5, a fourth capacitor C4, a second triode V2, and a sixth resistor R6, one end of the third resistor R3 is connected to the output end of the voltage sampling module 3, the other end of the third resistor R3 is connected to one end of the third capacitor C3, the base of the first triode V1, the other end of the third capacitor C3 is grounded, the collector of the first triode V1 is connected to one end of the fourth resistor R4, the base of the second triode V2, the other end of the fourth resistor R4 is grounded, the emitter of the first triode V1 is connected to one end of the fourth capacitor C4, one end of the fifth resistor R5, the other end of the fourth resistor C4 is grounded, the other end of the fifth resistor R5 is connected to a power supply voltage, the collector of the second triode V2 is connected to one end of the sixth resistor R6, and the other end of the sixth resistor R6 is connected to a power supply voltage, and the emitter of the second triode V2 is connected to the input end of the delay module 5.
The first triode V1 is a PNP triode, when the sampling voltage is smaller, a voltage difference exists between the emitter and the base of the first triode V1, the first triode V1 is conducted, the second triode V2 is driven to be conducted, and voltage is provided for the delay module 5; when the power grid fluctuates and the sampling voltage is large (exceeds a first threshold value), no voltage difference exists between the emitter and the base of the first triode V1, the first triode V1 is cut off, the second triode V2 is cut off, and no voltage is provided for the delay module 5.
In another embodiment: the supply voltage may be obtained by sampling a voltage conversion.
In this embodiment: referring to fig. 2, the delay module 5 includes a seventh resistor R7, an eighth resistor R8, a fifth capacitor C5, a third MOS transistor V3, and a silicon controlled rectifier Z2, one end of the seventh resistor R7 is connected to the output end of the voltage detection driving module 4, the other end of the seventh resistor R7 is connected to one end of the eighth resistor R8, one end of the fifth capacitor C5, and the G pole of the third MOS transistor V3, the other end of the fifth capacitor C5 is grounded, the other end of the eighth resistor R8 is connected to the control pole of the silicon controlled rectifier Z2, the positive pole of the silicon controlled rectifier Z2 is connected to the supply voltage, the negative pole of the silicon controlled rectifier Z2 is connected to the S pole of the third MOS transistor V3, and the D pole of the third MOS transistor V3 is connected to the input end of the prompt protection module 6.
The device is not electrified, no voltage exists at the fifth capacitor C5, the third MOS tube V3 (PMOS) is conducted, the silicon controlled rectifier Z2 is cut off, the fifth capacitor C5 is charged after the electrification, and the third MOS tube V3 is cut off and the silicon controlled rectifier Z2 is conducted along with the progress of the charging; when the mains voltage is normal, the voltage detection driving module 4 continuously supplies voltage, the third MOS tube V3 is not conducted, and the prompt protection module 6 is not driven to work; when the mains voltage is larger, the voltage detection driving module 4 stops supplying power, the fifth capacitor C5 starts to discharge, the mains voltage fluctuation condition exists in the discharging process of the fifth capacitor C5, the voltage detection driving module 4 has the phenomena of supplying power for a while, stopping supplying power for a while or stopping supplying power all the time, and in the process, as long as the voltage on the fifth capacitor C5 is not discharged too much to lead to the conduction of the third MOS tube V3, the prompt protection module 6 is not triggered, and the influence of the power failure of the mains voltage fluctuation on the household power consumption experience is avoided; in this process too, the fifth capacitor C5 is discharged too much to turn on the third MOS transistor V3, driving the prompt protection module 6.
In another embodiment: the seventh resistor R7 can be replaced by an adjustable resistor, so as to change the charge and discharge time of the fifth capacitor C5, and further change the tolerance degree of the mains voltage fluctuation when the third MOS tube V3 is turned on.
In this embodiment: referring to fig. 3, the prompt protection module 6 includes a relay J1, a second diode D2, and a SPEAKER speake, wherein one end of the relay J1 is connected to one end of the SPEAKER speak, a cathode of the second diode D2, an output end of the delay module 5, and an output end of the emergency protection module 8, the other end of the relay J1 is grounded, an anode of the second diode D2 is grounded, and the other end of the SPEAKER speak is grounded.
When the common point A inputs voltage, the relay J1 is electrified to work, the first switch S1 and the second switch S2 are controlled to be disconnected, and the household power module 7 stops working. The SPEAKER beeps to alert the user.
In another embodiment: the second diode D2 may be omitted, and the second diode D2 may be used as a freewheeling diode, so that a large current generated in the instant of switching on or off the relay J1 may be discharged.
In this embodiment: referring to fig. 4, the emergency protection module 8 includes a ninth resistor R9, a third diode D3, and a fourth diode D4, wherein one end of the ninth resistor R9 is connected to the output end of the voltage sampling module 3, the other end of the ninth resistor R9 is connected to the negative electrode of the third diode D3, the positive electrode of the third diode D3 is connected to the positive electrode of the fourth diode D4, and the negative electrode of the fourth diode D4 is connected to the input end of the prompt protection module 6.
When the voltage is input at the common point B (i.e., at the reference voltage), and the reference voltage is too large (reflecting that the mains voltage is too large), the third diode D3 is turned on as a zener diode, and thus the voltage is supplied to the common point a.
In another embodiment: the fourth diode D4 may be omitted, the fourth diode D4 acting as a current limiting diode, avoiding powering the emergency protection module 8 when the voltage is supplied by the delay module 5.
The working principle of the invention is as follows: the mains supply module 1 is used for supplying mains voltage and outputting the mains voltage to the voltage acquisition module 2 and the household power module 7; the voltage acquisition module 2 is used for acquiring the voltage of the mains supply and outputting the voltage to the voltage sampling module 3; the voltage sampling module 3 is used for obtaining sampling voltage and supplying the sampling voltage to the voltage detection driving module 4 and the emergency protection module 8; the voltage detection driving module 4 is used for detecting whether the sampling voltage is normal or not, and providing voltage for the delay module 5 when the sampling voltage is normal; stopping the supply of voltage to the delay module 5 when the first threshold is exceeded; the delay module 5 is used for judging whether the prompt protection module 6 is driven to work according to the voltage supply condition of the voltage detection driving module 4; the prompt protection module 6 is used for ringing to prompt a user and disconnecting the loop of the household power module 7 and the mains power module 1; the household electricity utilization module 7 is used for electrically obtaining household appliances; the emergency protection module 8 is configured to detect whether the sampling voltage exceeds a second threshold, and directly drive the prompt protection module 6 to operate when the sampling voltage exceeds the second threshold.
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 (7)

1. A power voltage monitoring device, characterized in that:
the power voltage monitoring device includes:
the mains supply module is used for supplying mains voltage and outputting the mains voltage to the voltage acquisition module and the household power module;
the voltage acquisition module is used for acquiring the voltage of the mains supply and outputting the voltage to the voltage sampling module;
the voltage sampling module is used for acquiring sampling voltage and supplying the sampling voltage to the voltage detection driving module and the emergency protection module;
the voltage detection driving module is used for detecting whether the sampling voltage is normal or not, and providing voltage for the delay module when the sampling voltage is normal; stopping providing the voltage to the delay module when the first threshold is exceeded;
the delay module is used for judging whether the prompt protection module is driven to work according to the voltage supply condition of the voltage detection driving module;
the prompt protection module is used for ringing to prompt a user and disconnecting the loops of the household power module and the mains supply module;
the household electricity utilization module is used for enabling household appliances to be electrified;
the emergency protection module is used for detecting whether the sampling voltage exceeds a second threshold value or not, and directly driving the prompt protection module to work when the sampling voltage exceeds the second threshold value;
the output end of the mains supply module is connected with the input end of the voltage acquisition module and the first input end of the household power module, the output end of the voltage acquisition module is connected with the input end of the voltage sampling module, the output end of the voltage sampling module is connected with the input end of the voltage detection driving module and the input end of the emergency protection module, the output end of the voltage detection driving module is connected with the input end of the delay module, the output end of the delay module is connected with the input end of the prompt protection module, the output end of the emergency protection module is connected with the input end of the prompt protection module, and the output end of the prompt protection module is connected with the second input end of the household power module.
2. The power voltage monitoring device according to claim 1, wherein the voltage acquisition module comprises a transformer, a first diode and a first capacitor, one end of the transformer is connected with the positive electrode of the first diode, the other end of the transformer is grounded, the negative electrode of the first diode is connected with one end of the first capacitor, the input end of the voltage sampling module is grounded, and the other end of the first capacitor is grounded.
3. The power voltage monitoring device according to claim 1, wherein the voltage sampling module comprises a first potentiometer, a first resistor, a controllable precise voltage stabilizing source, a second capacitor, a voltmeter and a second resistor, one end of the potentiometer is connected with the output end of the voltage acquisition module and the negative electrode of the controllable precise voltage stabilizing source, the other end of the potentiometer is connected with one end of the first resistor and the reference electrode of the controllable precise voltage stabilizing source, the other end of the first resistor is connected with the positive electrode of the controllable precise voltage stabilizing source, one end of the second capacitor, one end of the voltmeter, one end of the second resistor, the input end of the voltage detection driving module and the input end of the emergency protection module, the other end of the second capacitor is grounded, the other end of the voltmeter is grounded, and the other end of the second resistor is grounded.
4. The power voltage monitoring device according to claim 1, wherein the voltage detection driving module comprises a third resistor, a third capacitor, a first triode, a fourth resistor, a fifth resistor, a fourth capacitor, a second triode and a sixth resistor, one end of the third resistor is connected with the output end of the voltage sampling module, the other end of the third resistor is connected with one end of the third capacitor and the base of the first triode, the other end of the third capacitor is grounded, the collector of the first triode is connected with one end of the fourth resistor and the base of the second triode, the other end of the fourth resistor is grounded, the emitter of the first triode is connected with one end of the fourth capacitor and one end of the fifth resistor, the other end of the fourth capacitor is grounded, the other end of the fifth resistor is connected with the power supply voltage, the collector of the second triode is connected with one end of the sixth resistor, and the other end of the sixth resistor is connected with the power supply voltage, and the emitter of the second triode is connected with the input end of the delay module.
5. The power voltage monitoring device according to claim 1 or 4, wherein the delay module comprises a seventh resistor, an eighth resistor, a fifth capacitor, a third MOS tube and a silicon controlled rectifier, one end of the seventh resistor is connected with the output end of the voltage detection driving module, the other end of the seventh resistor is connected with one end of the eighth resistor, one end of the fifth capacitor and the G pole of the third MOS tube, the other end of the fifth capacitor is grounded, the other end of the eighth resistor is connected with the control pole of the silicon controlled rectifier, the anode of the silicon controlled rectifier is connected with the power supply voltage, the cathode of the silicon controlled rectifier is connected with the S pole of the third MOS tube, and the D pole of the third MOS tube is connected with the input end of the prompt protection module.
6. The power voltage monitoring device according to claim 1, wherein the prompt protection module comprises a relay, a second diode, and a speaker, one end of the relay is connected to one end of the speaker, a negative electrode of the second diode, an output end of the delay module, and an output end of the emergency protection module, the other end of the relay is grounded, an anode of the second diode is grounded, and the other end of the speaker is grounded.
7. The power voltage monitoring device according to claim 1, wherein the emergency protection module comprises a ninth resistor, a third diode and a fourth diode, one end of the ninth resistor is connected with the output end of the voltage sampling module, the other end of the ninth resistor is connected with the negative electrode of the third diode, the positive electrode of the third diode is connected with the positive electrode of the fourth diode, and the negative electrode of the fourth diode is connected with the input end of the prompt protection module.
CN202310654049.8A 2023-06-05 2023-06-05 Power voltage monitoring device Pending CN116679118A (en)

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CN203205831U (en) * 2013-05-07 2013-09-18 浙江南峰电气有限公司 Voltage monitoring protection circuit
CN206559035U (en) * 2017-01-21 2017-10-13 江苏中浩电力工程有限公司 Power circuit overheats automatic protective system
CN107147073A (en) * 2017-06-08 2017-09-08 西安微电子技术研究所 A kind of adjustable space computer power supply output overvoltage protection circuit that can restart
CN209948789U (en) * 2019-06-05 2020-01-14 重庆水利电力职业技术学院 Power distribution monitoring system
CN110336252A (en) * 2019-08-16 2019-10-15 深圳市智微智能软件开发有限公司 Space solid state distribution protects circuit, method and power supply-distribution system
CN112067883A (en) * 2020-09-14 2020-12-11 珠海格力电器股份有限公司 Voltage detection circuit and method and electric equipment
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
CN115693593A (en) * 2022-11-11 2023-02-03 珠海格力电器股份有限公司 Overvoltage protection device of vehicle power supply, vehicle and overvoltage protection method of vehicle power supply
CN116094143A (en) * 2023-04-06 2023-05-09 北京电科智芯科技有限公司 Power voltage detecting system

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