CN205811512U

CN205811512U - A kind of power-off control system

Info

Publication number: CN205811512U
Application number: CN201620778964.3U
Authority: CN
Inventors: 王春霞; 司国斌; 靳孝峰
Original assignee: Jiaozuo university
Current assignee: Jiaozuo university
Priority date: 2016-07-25
Filing date: 2016-07-25
Publication date: 2016-12-14
Anticipated expiration: 2026-07-25

Abstract

This utility model relates to intelligent power monitoring technical field, particularly relates to a kind of power-off control system.This practical new employing single-chip microcomputer control technology method, solves the technical problems such as conventional monitoring systems function singleness, has reached intelligent automaticization monitoring, runs into voltage and raises the technique effect reaching preset value power-off the most in time；Have employed voltage transformer and gather the detection Voltage Technique method of voltage, solve high-voltage signal and cannot enter directly into the technical problem of single-chip microcomputer, reach first and become low-voltage signal by voltage transformer by high-voltage signal, entered back into the technique effect that single-chip microcomputer is controlled；Have employed the technical method of the manual power-off of relay module key part; solve when electrical equipment is to some situations lower than preset voltage value also sensitivity; the technical problem that these electrical equipments may be made to damage, has reached the technique effect of manual power-off protecting circuit.

Description

A kind of power-off control system

Technical field

This utility model relates to intelligent power monitoring technical field, particularly relates to a kind of power-off control system.

Background technology

Along with the increase of power consumption, the problem of Electrical Safety the most gradually highlights.In recent years, due to a variety of causes, The fire caused by electricity consumption emerges in an endless stream, and according to the increase of power consumption, the equipment research of timely automated power-off has become as one Important topic.According to detection before and power-off system, it is only often to protect electricity according to fuse or some electric fuses Road, but the method security of this protection circuit is the highest, further encounters some and malfunction occurs because of the situation of voltage swell Situation about making, do so not only can affect the use of electric energy, also can cause some damages to the electrical equipment of voltage-sensitive, institute With, how to realize automatically detecting voltage and the circuit abnormal running situation that causes according to the rising of voltage and from dynamic circuit breaker Electricity, and then the protection to circuit becomes a present major issue.

Utility model content

Technical problem to be solved in the utility model, is the technical deficiency for above-mentioned existence, it is provided that a kind of power-off Control system, uses single-chip microcomputer control technology method, solves the technical problems such as conventional monitoring systems function singleness, reached intelligence Automatic monitoring can be changed, run into voltage and raise the technique effect reaching preset value power-off the most in time；Have employed voltage transformer to adopt The detection Voltage Technique method of collecting voltage, solves high-voltage signal and cannot enter directly into the technical problem of single-chip microcomputer, reach First being become low-voltage signal by voltage transformer by high-voltage signal enters back into the technique effect that single-chip microcomputer is controlled；Have employed and continue The technical method of the manual power-off of electrical appliance module key part, solves when electrical equipment feelings lower than preset voltage value to some During condition also sensitivity, the technical problem that these electrical equipments may be made to damage, reach the technique effect of manual power-off protecting circuit.

For solving above-mentioned technical problem, this utility model be the technical scheme is that to include that single machine unit, voltage are examined Survey unit, relay module and display module；The delivery outlet of voltage detection unit connects with the A/D conversion I/O mouth of single machine unit Connecing, display module is connected with the I/O mouth of single machine unit, and relay module is connected with the I/O mouth of single machine unit, power module It is connected with the power supply I/O mouth of single machine unit.

The mainly voltage transformer of voltage detection unit gather voltage signal after rectifier bridge D1 is out respectively with Capacitance is that the capacitor C5 and the electrochemical capacitor C6 that capacitance is 1000uF of 100uF connect, and connects after C6 anode is out The negative input of computing comparator U1, the negative terminal of C6 is connected with the negative pole of the normal phase input end of U1 and power module；C6 simultaneously Anode be connected with the outfan of computing comparator through resistance R4 and the electric capacity C7 that capacitance is 100uF that resistance value is 10K, C6 Being connected with the output of computing comparator through the resistance R5 that resistance value is 100K, the outfan of U1 connects with the P34 mouth of single machine unit Connecing, computing comparator U1 is connected with power module；The model that computing comparator uses is LM2904, and voltage transformer is DL- The voltage transformer of PT202D.

Optimizing the technical program further, described single machine unit is the single-chip microcomputer of STC12C5201AD, power module Switching Power Supply for 5V-3A.

Optimizing the technical program further, described relay module is the input of single machine unit P14 mouth, through resistance value is The resistance R2 of 10K is connected with power module VCC, and the input port P14 of single machine unit is through resistance R1 that resistance value is 10K and three poles The base stage of pipe Q1 connects, and the input port P14 of single machine unit is connected with power module GND through button S1；The colelctor electrode of Q1 simultaneously Being connected with the VCC of power module through the low-voltage coil side of relay, the emitter stage of Q1 is connected with the negative pole of power module, relay Relay for SRD-5VDC-SL-C.

Optimizing the technical program further, described display module is the LCDs of LCD12864；LCD12864's 20 pins and 2 pins of interface circuit are connected with the VCC of power module, 19 pins of LCD12864 and VSS pin and power supply mould The GND of block connects, and the RST pin of LCD12864 is connected with the P2.1 pin of single machine unit, the PSB pin of LCD12864 and electricity The GND of source module connects, and the E pin of LCD12864 is connected with the P2.0 pin of single machine unit, the RW pin of LCD12864 and The P1.7 pin of single machine unit connects, and RS (CS) pin of LCD12864 is connected with the P1.6 pin of single machine unit, The V0 pin of LCD12864 is connected with the slip side of 10K deflection machine R3, the other both sides of R3 respectively with the VCC of power module and GND connects.

Compared with prior art, this utility model has the advantage that

1, use STC12C5201AD single-chip microcomputer as main control unit, be integrated with the memorizer of larger capacity and enrich powerful Hardware interface circuit, there is very high performance price ratio, and this single-chip microcomputer carry A/D and changes mouth, can will collect Voltage is converted into digital quantity, is processed by single-chip microcomputer the most again；

2, use LCD12864 LCDs, the voltage of measurement can be shown at any time, detect the feelings of line voltage distribution at any time Condition, has been truly realized the situation reaching to make circuit damage when voltage and has taked situation the most in time, improves stability, reliable Property and safety；

3, using LM2904 voltage operational to compare device, have good common mode rejection ratio, capacity of resisting disturbance is strong, conversion speed Rate is strong, and capacity of resisting disturbance is strong, and stability is strong.

Accompanying drawing explanation

Fig. 1 is this utility model cut-away view；

Fig. 2 is single machine unit circuit diagram；

Fig. 3 is voltage detection unit circuit diagram；

Fig. 4 is relay module circuit diagram；

Fig. 5 is display module pinouts.

In figure, 1, single machine unit；2, power module；3, voltage detection unit；4, relay module；5, display module； 6, voltage transformer；7, relay；8, button.

Detailed description of the invention

For making the purpose of this utility model, technical scheme and advantage of greater clarity, below in conjunction with detailed description of the invention And referring to the drawings, this utility model is further described.It should be understood that these describe the most exemplary, and do not really want Limit scope of the present utility model.Additionally, in the following description, the description to known features and technology is eliminated, to avoid not Obscure concept of the present utility model necessarily.

Detailed description of the invention one: as Figure 1-5, including single machine unit 1, voltage detection unit 3, relay module 4 With display module 5；The A/D of the delivery outlet of voltage detection unit 3 and single machine unit 1 changes I/O mouth and is connected, display module 5 and The I/O mouth of single machine unit 1 connects, and relay module 4 is connected with the I/O mouth of single machine unit 1, power module 2 and single-chip microcomputer The power supply I/O mouth of unit 1 connects.

Voltage detection unit 3 gathers voltage signal by voltage transformer 6, after rectifier bridge D1 is out respectively with electricity Capacitance is that the capacitor C5 and the electrochemical capacitor C6 that capacitance is 1000uF of 100uF connect, and connects fortune after C6 anode is out Calculating the negative input of comparator U1, the negative terminal of C6 is connected with the negative pole of the normal phase input end of U1 and power module；C6 simultaneously Anode is connected with the outfan of computing comparator through resistance R4 and the electric capacity C7 that capacitance is 100uF that resistance value is 10K, C6 warp Resistance value is that the resistance R5 of 100K is connected with the outfan of computing comparator, and the outfan of U1 connects with the P34 mouth of single machine unit 1 Connecing, computing comparator U1 is connected with power module 2；The model that computing comparator uses is LM2904, and voltage transformer 6 is DL- The voltage transformer of PT202D.

Described single machine unit 1 is the single-chip microcomputer of STC12C5201AD, and power module 2 is the Switching Power Supply of 5V-3A；Institute The relay module 4 stated is the input of single machine unit 1P14 mouth, connects through resistance R2 and the power module 2VCC that resistance value is 10K Connecing, the input port P14 of single machine unit 1 is connected through the base stage of resistance R1 and the audion Q1 that resistance value is 10K, single machine unit The input port P14 of 1 is connected with power module 2GND through button 8S1；Simultaneously the colelctor electrode of Q1 through relay 7 low-voltage coil side with The VCC of power module 2 connects, and the emitter stage of Q1 is connected with the negative pole of power module 2, and relay 7 continues for SRD-5VDC-SL-C's Electrical equipment；Described display module 5 is the LCDs of LCD12864；20 pins of the interface circuit of LCD12864 and 2 pins Being connected with the VCC of power module 2,19 pins and the VSS pin of LCD12864 are connected with the GND of power module 2, LCD12864's RST pin is connected with the P2.1 pin of single machine unit 1, and the PSB pin of LCD12864 is connected with the GND of power module 2, The E pin of LCD12864 is connected with the P2.0 pin of single machine unit 1, the RW pin of LCD12864 and single machine unit 1 P1.7 pin connects, and RS (CS) pin of LCD12864 is connected with the P1.6 pin of single machine unit 1, the V0 pin of LCD12864 Being connected with the slip side of 10K deflection machine R3, the other both sides of R3 VCC and GND with power module 2 respectively is connected.

In Fig. 1, voltage detection unit 3 can gather voltage signal by voltage transformer 6, the most again by single from high pressure The A/D conversion mouth of sheet machine unit 1 enters in single-chip microcomputer, and voltage signal can be monitored, such as voltage by single machine unit 1 at any time Value is higher than the magnitude of voltage set, then single machine unit 1 can be to the transistor base low level signal of relay module, and audion is led Logical, relay disconnects, circuit will power-off, then achieve the protection to circuit, display module 5 can show at any time and surveyed electricity simultaneously Pressure, when voltage is unsatisfactory for properly functioning magnitude of voltage, then can manual disconnecting circuit, it is achieved that automatically power off and artificial power-off Double insurance.

Fig. 2 is the circuit structure diagram of MCU unit 1, uses STC12C5204AD single-chip microcomputer as main control unit, is integrated with relatively Jumbo memorizer and abundant powerful hardware interface circuit, have very high performance price ratio, and carry A/D conversion mouth, Need not the most additionally use A/D conversion chip.

It should be appreciated that above-mentioned detailed description of the invention of the present utility model is used only for exemplary illustration or explains this reality By novel principle, and do not constitute restriction of the present utility model.Therefore, without departing from spirit and scope of the present utility model In the case of any modification, equivalent substitution and improvement etc. done, within should be included in protection domain of the present utility model.Additionally, This utility model claims are intended to fall into scope and border or this scope and border Whole in equivalents change and modifications example.

Claims

1. a power-off control system, it is characterised in that: include single machine unit, voltage detection unit, relay module and show Show module；The delivery outlet of voltage detection unit is changed I/O mouth with the A/D of single machine unit and is connected, display module and single-chip microcomputer list The I/O mouth of unit connects, and relay module is connected with the I/O mouth of single machine unit, power module and the power supply I/O of single machine unit Mouth connects；

Voltage detection unit gathers voltage signal by voltage transformer, after rectifier bridge D1 is out with capacitance is respectively The capacitor C5 of 100uF and the electrochemical capacitor C6 that capacitance is 1000uF connects, and after C6 anode is out, concatenation operation is compared The negative input of device U1, the negative terminal of C6 is connected with the negative pole of the normal phase input end of U1 and power module；The anode warp of C6 simultaneously Resistance value is that the resistance R4 and the electric capacity C7 that capacitance is 100uF of 10K are connected with the outfan of computing comparator, and C6 is through resistance value Being connected with the outfan of computing comparator for the resistance R5 of 100K, the outfan of U1 is connected with the P34 mouth of single machine unit, computing Comparator U1 is connected with power module；The model that computing comparator uses is LM2904, and voltage transformer is the electricity of DL-PT202D Pressure transformer.

A kind of power-off control system the most according to claim 1, it is characterised in that: single machine unit is STC12C5201AD Single-chip microcomputer, power module is the Switching Power Supply of 5V-3A.

A kind of power-off control system the most according to claim 1, it is characterised in that: relay module is single machine unit P14 mouth inputs, and is connected with power module VCC through the resistance R2 that resistance value is 10K, and the input port P14 of single machine unit is through resistance Value is connected for the base stage of the resistance R1 and audion Q1 of 10K, and the input port P14 of single machine unit is through button S1 and power module GND connects；The colelctor electrode of Q1 is connected with the VCC of power module through the low-voltage coil side of relay simultaneously, the emitter stage of Q1 and electricity The negative pole of source module connects, and relay is the relay of SRD-5VDC-SL-C.

A kind of power-off control system the most according to claim 1, it is characterised in that: display module is the liquid crystal of LCD12864 Display screen；20 pins and 2 pins of the interface circuit of LCD12864 are connected with the VCC of power module, 19 pins of LCD12864 Being connected with the GND of power module with VSS pin, the RST pin of LCD12864 is connected with the P2.1 pin of single machine unit, The PSB pin of LCD12864 is connected with the GND of power module, and the E pin of LCD12864 connects with the P2.0 pin of single machine unit Connecing, the RW pin of LCD12864 is connected with the P1.7 pin of single machine unit, RS (CS) pin of LCD12864 and single-chip microcomputer list Unit P1.6 pin connect, the V0 pin of LCD12864 is connected with the slip side of 10K deflection machine R3, the other both sides of R3 respectively with VCC and GND of power module connects.