CN201854010U - Multifunctional overvoltage and undervoltage protection monitoring system - Google Patents

Multifunctional overvoltage and undervoltage protection monitoring system Download PDF

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Publication number
CN201854010U
CN201854010U CN2010205696755U CN201020569675U CN201854010U CN 201854010 U CN201854010 U CN 201854010U CN 2010205696755 U CN2010205696755 U CN 2010205696755U CN 201020569675 U CN201020569675 U CN 201020569675U CN 201854010 U CN201854010 U CN 201854010U
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China
Prior art keywords
circuit
single chip
overvoltage
voltage
monitoring system
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Expired - Fee Related
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CN2010205696755U
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Chinese (zh)
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李彬斌
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Individual
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Individual
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Abstract

The utility model relates to a protection device for electrical equipment, in particular to a multifunctional overvoltage and undervoltage protection monitoring system. Voltage signals are collected by a voltage detection circuit, then pass through an A/D (analog/digital) conversion circuit for data conversion and are finally transmitted to a single chip microcomputer control circuit, wherein the single chip microcomputer control circuit is used for transmitting remote data to a system host computer through a 485 interface communication circuit; and signals of the single chip microcomputer control circuit are transmitted to a display circuit, an alarm circuit and a power supply switching and driving circuit. The monitoring system has the functions of emitting sound and light alarm signals and displaying the current state during overvoltage and undervoltage; and when voltage gets right, a power supply can be recovered automatically, and data of various electrical parameters is simultaneously transmitted to the system host computer in a remote manner through a system bus. For the monitoring system, the structure is simple, the performances are stable and reliable, and the safety is high.

Description

Multi-functional overvoltage/undervoltage protection supervisory control system
Technical field
The utility model relates to a kind of protective device that is used for electric equipment, particularly relates to a kind of multi-functional overvoltage/undervoltage protection supervisory control system.
Background technology
Power grid quality is related to the running status of household electrical appliance and various electric equipments, because the load on the electrical network is ever-changing, and the pollution of various harmonic waves abrim, if line voltage meeting higher or on the low side causes electric equipment to damage, even breaking out of fire.So for fail safe and the functional reliability that improves subscriber equipment, needing increases the corresponding protection device to electrical network, pass around a voltage protector tool voltage detecting defencive function, can't construction system and data remote.
The utility model content
The purpose of this utility model provides a kind of stable and reliable for performance, and is safe, and various electric parameters can be protected supervisory control system with data remote to the multi-functional overvoltage/undervoltage of system host by system bus.
The technical scheme that the utility model adopted is such: a kind of multi-functional overvoltage/undervoltage protection supervisory control system; by voltage detecting circuit gather voltage signal after A D change-over circuit data transaction; be delivered to single chip machine controlling circuit again, single chip machine controlling circuit arrives system host by 485 interface communication circuit remote data transmission.
Described single chip machine controlling circuit signal conveys is to display circuit, warning circuit, power supply switch driving circuit.
By adopting the aforementioned techniques scheme; the beneficial effects of the utility model are: this multi-functional overvoltage/undervoltage protection supervisory control system have served as, during under voltage; send the sound and light alarm signal; and the function of demonstration current state, when voltage recovers just often automatic recovery of power supply; simultaneously various electric parameters are arrived system host by system bus with data remote; simple in structure, stable and reliable for performance, safe.
Description of drawings
Fig. 1 is the frame assumption diagram of the utility model embodiment;
Fig. 2 is the circuit diagram of the utility model embodiment.
Embodiment
Further specify the utility model below in conjunction with the drawings and specific embodiments.
As Fig. 1, shown in Figure 2, B1 is a voltage transformer, its performance is output in 100: 1,220V is input to the B1 primary coil when the voltage input, the voltage of secondary output is through diode D1 rectification, capacitor C 1 C2 filtering in parallel, resistance R 1 current limliting, resistance R 2 dividing potential drops, voltage detecting circuit is formed in capacitor C 3 filtering, this d. c. voltage signal is for gathering voltage signal, output signal is connected to the 2nd pin of A/D change-over circuit U5, after the inner A/D data transaction of A/D change-over circuit U5, by A/D change-over circuit U5 the 5th, 6,7 ends and U1 the 34th, 35,36 ends are formed the serial data communication circuit, after the voltage data conversion that A/D change-over circuit U5 is read, the 5th of A/D change-over circuit U5,6,7 pin are connected to the 34th of single chip machine controlling circuit U1,35,36 pin judge whether to be in the overvoltage/undervoltage state through the inner benchmark database that is provided with of single chip machine controlling circuit U1.
When voltage transformer B1 primary input terminal input voltage greater than 275V or when being lower than 155V, when secondary no-load voltage ratio is exported 2.75V, 1.55V, after A/D change-over circuit U5 voltage transitions, single chip machine controlling circuit U1 was judged as, under-voltage state, this time-divisions three tunnel output: the first via is formed display circuit by display circuit U4 and peripheral circuit, and the output of single chip machine controlling circuit U1 the 4th, 6,7,8 serial datas drives display circuit U4 and shows current real time data.No. the second display circuit U1 the 39th pin output low level signal, through resistance R 10 current limlitings triode T2 is ended, this moment, report to the police music integrated circuit U6, audio power amplifier circuit U7 obtained trigger voltage, by warning music integrated circuit U6 the 2nd pin output audio signal, be connected to the 3rd pin of audio power amplifier circuit U7, its the 6th pin output alarm signal through capacitor C 6 couplings, promotes buzzer Y and sends audio alert.Third Road is judged this voltage signal by single chip machine controlling circuit U1 internal database, joint detection is worked as A/D change-over circuit U5 data converted and is returned to greater than 2.75V, 1.55V the time, by single chip machine controlling circuit U1 the 5th pin output electronegative potential, through resistance R 8 current limlitings triode T1 is ended, impel the relay J adhesive, promote also adhesive of contactor KM simultaneously, when A/D change-over circuit U5 data converted returns to less than 2.75V, 1.55V the time, by single chip machine controlling circuit U1 the 5th pin output high potential, make triode T1 saturation condition through resistance R 8 current limlitings, impel relay J to discharge, promote contactor KM and also discharge, recover monitoring state automatically, the high level signal of the 39th pin of single chip machine controlling circuit U1 output simultaneously, make triode T2 saturated through resistance R 10 current limlitings, alert sound stops.
More than show and described basic principle of the present utility model and principal character and advantage thereof; the technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the explanation just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (2)

1. multi-functional overvoltage/undervoltage protection supervisory control system; it is characterized in that: by voltage detecting circuit (1) gather voltage signal after A D change-over circuit (2) data transaction; be delivered to single chip machine controlling circuit (3) again, single chip machine controlling circuit (3) arrives system host by 485 interface communication circuit (4) remote data transmission.
2. multi-functional overvoltage/undervoltage protection supervisory control system according to claim 1, it is characterized in that: described single chip machine controlling circuit (3) signal conveys is to display circuit (5), warning circuit (6), power supply switch driving circuit (7).
CN2010205696755U 2010-10-18 2010-10-18 Multifunctional overvoltage and undervoltage protection monitoring system Expired - Fee Related CN201854010U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010205696755U CN201854010U (en) 2010-10-18 2010-10-18 Multifunctional overvoltage and undervoltage protection monitoring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010205696755U CN201854010U (en) 2010-10-18 2010-10-18 Multifunctional overvoltage and undervoltage protection monitoring system

Publications (1)

Publication Number Publication Date
CN201854010U true CN201854010U (en) 2011-06-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010205696755U Expired - Fee Related CN201854010U (en) 2010-10-18 2010-10-18 Multifunctional overvoltage and undervoltage protection monitoring system

Country Status (1)

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CN (1) CN201854010U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107065654A (en) * 2017-03-14 2017-08-18 华勤通讯技术有限公司 A kind of chip protection circuit, guard method and terminal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107065654A (en) * 2017-03-14 2017-08-18 华勤通讯技术有限公司 A kind of chip protection circuit, guard method and terminal

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110601

Termination date: 20121018