CN205693349U - A kind of lamp control protection system of signal lights - Google Patents
A kind of lamp control protection system of signal lights Download PDFInfo
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- CN205693349U CN205693349U CN201620363632.9U CN201620363632U CN205693349U CN 205693349 U CN205693349 U CN 205693349U CN 201620363632 U CN201620363632 U CN 201620363632U CN 205693349 U CN205693349 U CN 205693349U
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- chip microcomputer
- detection circuit
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Abstract
This utility model embodiment discloses the lamp control protection system of a kind of signal lights; including zero cross detection circuit, zero-cross triggering circuit, single-chip microcomputer, load current detection circuit; described zero cross detection circuit is for detecting the zero cross signal of power supply; and export zero signal give described single-chip microcomputer, described single-chip microcomputer according to described zero signal output control signal trigger described zero-cross triggering circuit makes signal lights connect with power supply；Described zero-cross triggering circuit includes optical coupler, controllable silicon, the light-receiving device of described optical coupler and divider resistance are serially connected with on power supply, described silicon controlled controls end and obtains conducting voltage from described divider resistance, and described thermocouple device is triggered by described single-chip microcomputer, makes described controlled silicon conducting.Using this utility model, effectively signal lights power supply can be carried out current detecting, if operating current occurs abnormal, exceed the threshold range of setting, shutoff signal lamp is from the power supply of machine immediately, can effectively protect equipment, it is ensured that equipment works in rated voltage current range.
Description
Technical field
This utility model relates to electronic circuit field, particularly relates to the lamp control protection system of a kind of signal lights.
Background technology
Electrical equipment in electric control circuit or the insulating barrier of electric wire is damaged, load short circuits, wiring error time moment
Electric current has exceeded tens even tens times of rated current, and electrical equipment is because of the powerful electric power of the excessive generation of electric current and electrical heat energy
And damage, even cause burning time serious.Therefore, the power supply of electrical equipment needs to do short-circuit protection.
Doing in the process of short-circuit protection to signal lights, the method that tradition uses is to use electric fuse.Electric fuse is connected on letter
On the live wire of signal lamp, when normal circuit operation, it is only equivalent to a wire, it is possible to the conducting of long-time stable.Due to electricity
Source or other factors cause occurring bigger overcurrent in circuit, the rated current of over insurance silk, blown fuse, electricity
Road disconnects, and plays the effect of protection circuit.But fusing that such scheme exists electric fuse is irreversible, signal lights to be recovered is just
Circuit must be first investigated in often work, again changes electric fuse, at a large complicated crossing, and the substantial amounts of signal of installation of needs
Lamp, is also required to the electric fuse of equivalent amount simultaneously.This produces the most loaded down with trivial details, due to electric fuse itself with in erection stage at equipment
Fusing principle, cause the short-circuit protection of equipment more passive, electric fuse cannot be reused.
Summary of the invention
This utility model embodiment technical problem to be solved is, it is provided that the lamp control protection system of a kind of signal lights.
Can effectively protect equipment, it is ensured that equipment works in rated voltage current range.
In order to solve above-mentioned technical problem, this utility model embodiment provides the lamp control protection system of a kind of signal lights,
Including zero cross detection circuit, zero-cross triggering circuit, single-chip microcomputer, load current detection circuit, described zero cross detection circuit is used for examining
Survey power supply zero cross signal, and export zero signal give described single-chip microcomputer, described single-chip microcomputer according to described zero signal output control
Signal processed triggers described zero-cross triggering circuit makes signal lights connect with power supply；
Described zero-cross triggering circuit includes that optical coupler, controllable silicon, the light-receiving device of described optical coupler are serially connected with divider resistance
On power supply, described silicon controlled controls end and obtains conducting voltage from described divider resistance, and described optical coupler passes through described monolithic
Machine triggers, and makes described controlled silicon conducting；
Described load current detection circuit includes transformer, the Schottky diode concatenated with described signal lights, described list
Sheet machine reversely concatenates the current value that described Schottky diode obtains the power supply of load from described transformer.
Further, also include that source current testing circuit, described source current testing circuit include dropping power supply
The transformator of pressure, the rectifier bridge that transformation electric current is carried out rectification, the diode that is serially connected on described rectification bridge output end, described list
Sheet machine obtains sample rate current by sampling resistor from described diode.
Wherein, described zero cross detection circuit includes the optical coupler being connected to power output end, the pair of optical coupler a pair
Outfan connect phase inverter.
Implement this utility model embodiment, have the advantages that this utility model can be effectively to signal lights power supply
Carrying out current detecting, if operating current occurs abnormal, exceed the threshold range of setting, shutoff signal lamp is from the power supply of machine immediately,
Can effectively protect equipment, it is ensured that equipment works in rated voltage current range.
Accompanying drawing explanation
Fig. 1 is overall structure schematic block diagram of the present utility model；
Fig. 2 is the schematic diagram of zero cross detection circuit；
Fig. 3 is the schematic diagram of zero-cross triggering circuit；
Fig. 4 is the schematic diagram of source current testing circuit.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, new to this practicality below in conjunction with accompanying drawing
Type is described in further detail.
With reference to the structural representation shown in Fig. 1.
The lamp control protection system of a kind of signal lights of this utility model embodiment, touches including zero cross detection circuit 10, zero passage
Power Generation Road 20, single-chip microcomputer 30, load current detection circuit 40, source current testing circuit 50, signal lights 60.
Physical circuit figure with reference to the zero cross detection circuit 10 shown in Fig. 2.
Zero cross detection circuit 10 includes a pair optical coupler U1, U2 of being connected to power output end by current-limiting resistance R1, light
The outfan of coupling device U1, U2 connects the input of phase inverter U3, and the input of phase inverter U3 connects 5V electricity by pull-up resistor R2
Source, zero signal is accessed single-chip microcomputer 30 by the outfan of phase inverter U3.
Single-chip microcomputer 30 triggers zero-cross triggering circuit 20 according to zero signal output control signal.
With reference to the zero-cross triggering circuit 20 shown in Fig. 3, zero-cross triggering circuit 20 includes optical coupler U4, controllable silicon D1, optocoupler
The luminous organ of device U4 is obtained by switch triode single-chip microcomputer and triggers signal, and light-receiving device is serially connected with electricity by divider resistance R3, R4
On the live wire in source, the control end of controllable silicon D1 obtains conducting voltage from resistance R4, makes signal lights 60 by controllable silicon D1 and power supply
Connection.
In order to detect the current conditions of load signal lamp, signal lights 60 also concatenates load current detection circuit 40, load electricity
Current detection circuit 40 includes the induction end of transformer U5, the Schottky diode D2 concatenated with signal lights, transformer U5 and connects electricity
Stream sampling resistor, single-chip microcomputer reversely concatenates Schottky diode D2, obtains the current value of the power supply of load from transformer U5, when negative
When current anomaly occurs in load signal light, stop silicon controlled being triggered, interrupt power supply supply.
For detection to abnormity of power supply further, also include source current testing circuit 50, as shown in Figure 4 circuit diagram.
Source current testing circuit 50 includes power supply carrying out the transformator T1 of blood pressure lowering, transformation electric current being carried out the whole of rectification
Stream bridge D3, the diode D4 being serially connected on rectification bridge output end, diode D4 outfan is serially connected with current-limiting resistance R5, single-chip microcomputer
Obtain sample rate current R6, when current anomaly occurs in power supply, the power supply of stop light by current sampling resistor, reach protection
Purpose.
Certainly above-described embodiment is only for illustrating technology of the present utility model design and feature, its object is to allow and is familiar with this
The people of technology will appreciate that content of the present utility model and implements according to this, can not limit protection model of the present utility model with this
Enclose.All modifications done according to the spirit of this utility model main technical schemes, all should contain guarantor of the present utility model
Within the scope of protecting.
Claims (3)
1. the lamp control protection system of a signal lights, it is characterised in that include zero cross detection circuit, zero-cross triggering circuit, monolithic
Machine, load current detection circuit, described zero cross detection circuit is for detecting the zero cross signal of power supply, and exports zero signal to institute
State single-chip microcomputer, described single-chip microcomputer according to described zero signal output control signal trigger described zero-cross triggering circuit make signal lights with
Power supply connects；
Described zero-cross triggering circuit includes that optical coupler, controllable silicon, the light-receiving device of described optical coupler and divider resistance are serially connected with power supply
On, described silicon controlled controls end and obtains conducting voltage from described divider resistance, and described optical coupler is touched by described single-chip microcomputer
Send out, make described controlled silicon conducting；
Described load current detection circuit includes transformer, the Schottky diode concatenated with described signal lights, described single-chip microcomputer
Reversely concatenate the current value that described Schottky diode obtains the power supply of load from described transformer.
The lamp control protection system of signal lights the most according to claim 1, it is characterised in that also include source current detection electricity
Road, described source current testing circuit include power supply is carried out blood pressure lowering transformator, transformation electric current is carried out rectification rectifier bridge,
Being serially connected in the diode on described rectification bridge output end, described single-chip microcomputer obtains sampling electricity by sampling resistor from described diode
Stream.
The lamp control protection system of signal lights the most according to claim 1, it is characterised in that described zero cross detection circuit includes
Being connected to the optical coupler of power output end for a pair, the outfan of the pair of optical coupler connects phase inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620363632.9U CN205693349U (en) | 2016-04-27 | 2016-04-27 | A kind of lamp control protection system of signal lights |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620363632.9U CN205693349U (en) | 2016-04-27 | 2016-04-27 | A kind of lamp control protection system of signal lights |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205693349U true CN205693349U (en) | 2016-11-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620363632.9U Active CN205693349U (en) | 2016-04-27 | 2016-04-27 | A kind of lamp control protection system of signal lights |
Country Status (1)
| Country | Link |
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| CN (1) | CN205693349U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110113037A (en) * | 2019-05-27 | 2019-08-09 | 深圳和而泰小家电智能科技有限公司 | Super-zero control circuit and electronic equipment |
-
2016
- 2016-04-27 CN CN201620363632.9U patent/CN205693349U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110113037A (en) * | 2019-05-27 | 2019-08-09 | 深圳和而泰小家电智能科技有限公司 | Super-zero control circuit and electronic equipment |
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| GR01 | Patent grant |