CN104427690A - Protection circuit - Google Patents
Protection circuit Download PDFInfo
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- CN104427690A CN104427690A CN201310373509.6A CN201310373509A CN104427690A CN 104427690 A CN104427690 A CN 104427690A CN 201310373509 A CN201310373509 A CN 201310373509A CN 104427690 A CN104427690 A CN 104427690A
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- module
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- limiting resistance
- temperature
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Abstract
The embodiment of the invention discloses a protection circuit. The protection circuit includes a power source module which is used for supplying power for the protection circuit and a load, a temperature acquisition module which is connected with the power source module and is used for acquiring the temperature of a work area and outputting corresponding electrical signals, a control module which is connected with the power source module and the temperature acquisition module and is used for receiving the corresponding electrical signals of the temperature of the work area, and outputs control signals when the temperature of the work area reaches a preset temperature threshold value, and a switch module which is connected with the power source module and the load respectively and is connected with the control module, and is used for controlling a closed circuit of the power source module and the load to be disconnected according to the control signals output by the control module. With the protection circuit of the invention adopted, a power source can be automatically disconnected when the temperature of the load is too high, and therefore, the stability of circuit use can be improved, and the service lives of circuit components and the load can be prolonged.
Description
Technical field
The present invention relates to electronic applications, particularly relate to a kind of protective circuit.
Background technology
The safety and stability that light fixture uses is extremely important, has very important impact to daily life and work.Along with the prolongation of light fixture operating time, luminous element and the internal circuit components and parts of light fixture all can generate heat.Long when the light fixture operating time, when lamp temperatures is too high, easily causes light fixture or internal circuit components and parts to burn, bring a lot of adverse influence to the live and work of people, time serious, even affect the safety of people.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, provides a kind of protective circuit.Can when load temperature is too high auto power off, improve circuit use stability, extend the useful life of circuit components and load.
In order to solve the problems of the technologies described above, embodiments provide a kind of protective circuit, comprising:
Power module, for being described protective circuit and load supplying;
Temperature collect module, is connected with described power module, and the temperature for collecting work region also exports the corresponding signal of telecommunication;
Control module, is connected with described temperature collect module, for receiving the signal of telecommunication corresponding with the temperature of described working region, when the temperature of described working region reaches preset temperature threshold value, exports control signal;
Switch module, is connected respectively with described power module and described load, and is connected with described control module, and for the control signal exported according to described control module, the path controlling described power module and described load disconnects.
Wherein, described circuit also comprises:
Alarm module, is connected with described control module, for the control signal exported according to described control module, and warning reminding user.
Wherein, described circuit also comprises:
Voltage transformation module, the input of described voltage transformation module is connected with described power module, output is connected with described temperature collect module and described control module respectively, for by the voltage transitions of described power module being the operating voltage of described temperature collect module and described control module.
Wherein, described temperature collect module comprises temperature sensor, the first current-limiting resistance, the grounding pin ground connection of described temperature sensor, power input pin connects the output of described voltage transformation module, input and output pin connects one end of described first current-limiting resistance, control module described in another termination of described first current-limiting resistance.
Wherein, described control module comprises single-chip microcomputer, the grounding pin ground connection of described single-chip microcomputer, and power input pin connects the output of described voltage transformation module, and control signal input pin connects described first current-limiting resistance, and control signal output pin connects described switch module.
Wherein, described switch module comprises the second current-limiting resistance, 3rd current-limiting resistance, switching tube, relay, the control signal output pin of described single-chip microcomputer comprises the first output pin, second output pin, described first output pin connects the collector electrode of described switching tube, the emitter of described switching tube connects the coil first end of described relay, the coil second end ground connection of described relay, described second output pin connects one end of described second current-limiting resistance, one end of 3rd current-limiting resistance described in another termination of described second current-limiting resistance, the other end ground connection of described 3rd current-limiting resistance, the common node of described second current-limiting resistance and described 3rd current-limiting resistance connects the base stage of described switching tube.
Wherein, described switch module also comprises the 4th current-limiting resistance, coil second end of relay described in described 4th current-limiting resistance one termination, other end ground connection.
Wherein, described alarm module comprises buzzer, the 5th current-limiting resistance, and the control signal output pin of described single-chip microcomputer also comprises the 3rd output pin, the 3rd output pin described in described 5th current-limiting resistance one termination, one end of buzzer described in another termination, the other end ground connection of described buzzer.
Wherein, the model of described temperature sensor is DS18B20.
Wherein, the model of described single-chip microcomputer is ATtiny13.
Implement the embodiment of the present invention, there is following beneficial effect:
Gather the temperature of the working region near load by temperature collect module and be converted into the signal of telecommunication and export control module to, control signal is exported when the temperature of working region reaches preset temperature threshold value again by control module, the path of control switch module shuts down power module and load, thus namely achieve load temperature too high time auto power off, improve the stability that circuit uses, extend the useful life of circuit components and load, whole circuit structure is simple, stable performance.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the connection diagram of the first embodiment of protective circuit of the present invention;
Fig. 2 is the connection diagram of the second embodiment of protective circuit of the present invention;
Fig. 3 is the circuit diagram of the 3rd embodiment of protective circuit of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to Fig. 1, be the connection diagram of the first embodiment of protective circuit of the present invention, in the present embodiment, described circuit comprises: power module 1, temperature collect module 2, control module 3, switch module 4.
Described power module 1 is for being described protective circuit and load supplying;
Described temperature collect module 2 is connected with described power module 1, and the temperature for collecting work region also exports the corresponding signal of telecommunication;
Described control module 3 is connected with described temperature collect module 2, for receiving the signal of telecommunication corresponding with the temperature of described working region, when the temperature of described working region reaches preset temperature threshold value, exports control signal;
Described switch module 4 is connected respectively with described power module 1 and described load, and is connected with described control module 3, for the control signal exported according to described control module 3, controls described power module 1 and disconnects with the path of described load.
Gather the temperature of the working region near load by temperature collect module and be converted into the signal of telecommunication and export control module to, control signal is exported when the temperature of working region reaches preset temperature threshold value again by control module, the path of control switch module shuts down power module and load, thus namely achieve load temperature too high time auto power off, improve the stability that circuit uses, extend the useful life of circuit components and load, whole circuit structure is simple, stable performance.
Please refer to Fig. 2, be the connection diagram of the second embodiment of protective circuit of the present invention, in the present embodiment, described circuit comprises: power module 1, temperature collect module 2, control module 3, switch module 4, alarm module 5, voltage transformation module 6.
Described power module 1 is for being described protective circuit and load supplying;
Described temperature collect module 2 is connected with described power module 1, and the temperature for collecting work region also exports the corresponding signal of telecommunication;
Described control module 3 is connected with described temperature collect module 2, for receiving the signal of telecommunication corresponding with the temperature of described working region, when the temperature of described working region reaches preset temperature threshold value, exports control signal;
Described switch module 4 is connected respectively with described power module 1 and described load, and is connected with described control module 3, for the control signal exported according to described control module 3, controls described power module 1 and disconnects with the path of described load.
Described alarm module 5 is connected with described control module 3, for the control signal exported according to described control module 3, and warning reminding user.
The input of described voltage transformation module 6 is connected with described power module 1, output is connected with described temperature collect module 2 and described control module 3 respectively, for by the voltage transitions of described power module 1 being the operating voltage of described temperature collect module 2 and described control module 3.
By increasing alarm module, can when the temperature of working region reach preset temperature threshold value, warning reminding user, improve the warning of circuit, even if switch module lost efficacy, circuit did not automatically shut down, and also manually can be turned off according to alarm signal by user.
Please refer to Fig. 3, be the circuit diagram of the 3rd embodiment of protective circuit of the present invention, in the present embodiment, described circuit comprises: power module, temperature collect module, control module, switch module, alarm module, voltage transformation module.
Preferably, described temperature collect module comprises temperature sensor P, the first current-limiting resistance R1, the grounding pin i.e. first pin ground connection of described temperature sensor P, power input pin i.e. the 3rd pin connects the output of described voltage transformation module, input and output pin i.e. the second pin connects one end of described first current-limiting resistance R1, control module described in another termination of described first current-limiting resistance R1.
Described control module comprises single-chip microcomputer U, grounding pin i.e. the 4th pin ground connection of described single-chip microcomputer U, power input pin i.e. the 8th pin connects the output of described voltage transformation module, control signal input pin i.e. the first pin meets described first current-limiting resistance R1, and control signal output pin comprises second and third pin and connects described switch module.5th pin (PB0) and the 6th pin (PB1) of described single-chip microcomputer U are unsettled.
Described switch module comprises the second current-limiting resistance R2, 3rd current-limiting resistance R3, switching tube Q, relay M, the control signal output pin of described single-chip microcomputer U comprises the first output pin i.e. the second pin (PB3), second output pin i.e. the 3rd pin (PB4), described first output pin (PB3) connects the collector electrode of described switching tube Q, the emitter of described switching tube Q connects the coil first end of described relay M, the coil second end ground connection of described relay M, described second output pin (PB4) connects one end of described second current-limiting resistance R2, one end of 3rd current-limiting resistance R3 described in another termination of described second current-limiting resistance R2, the other end ground connection of described 3rd current-limiting resistance R3, the common node of described second current-limiting resistance R2 and described 3rd current-limiting resistance R3 connects the base stage of described switching tube Q.
More preferably, described switch module also comprises the 4th current-limiting resistance R4, coil second end of relay M described in described 4th current-limiting resistance R4 mono-termination, other end ground connection.
Described alarm module comprises buzzer L, the 5th current-limiting resistance R5, the control signal output pin of described single-chip microcomputer U also comprises the 7th pin (PB2) of the 3rd output pin and described single-chip microcomputer U, 3rd output pin (PB2) described in described 5th current-limiting resistance R5 mono-termination, one end of buzzer L described in another termination, the other end ground connection of described buzzer L.
The model of described temperature sensor is DS18B20.
The model of described single-chip microcomputer is ATtiny13.It applies maturation, and stable performance is cheap.
The course of work of whole protective circuit is as follows:
Power module output voltage Uin, is connected with load by the K switch of relay M, for load provides the voltage of Uo, drives loaded work piece, and the voltage that Uin is converted to 5V through voltage transformation module is simultaneously that temperature sensor P and single-chip microcomputer U power, to protect load.Due to load long-term work, the temperature of its working region rises thereupon, temperature in temperature sensor P collecting work region is also converted to the signal of telecommunication and exports single-chip microcomputer U to, when the temperature collected reaches the temperature threshold preset in single-chip microcomputer U, second pin of single-chip microcomputer U, 3rd pin all exports high level, make switching tube Q conducting, relay M powers on, K switch switches, thus the path of Uin to Uo is disconnected, stopping power module is load supplying, 7th pin of single-chip microcomputer U also exports high level simultaneously, make connected buzzer warning reminding user.If the other reasonses such as relay failure cause K switch not switch, user also manually can stop the work of load according to alarm, guarantee safety and the useful life of load.When the temperature of working region drops to below threshold value, K switch switches again, the path between conducting Uin and Uo, is load supplying.Thus realize automatically switching according to the change of temperature.
It should be noted that, each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, between each embodiment identical similar part mutually see.For device embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
By the description of above-described embodiment, the present invention has the following advantages:
Gather the temperature of the working region near load by temperature collect module and be converted into the signal of telecommunication and export control module to, control signal is exported when the temperature of working region reaches preset temperature threshold value again by control module, the path of control switch module shuts down power module and load, thus namely achieve load temperature too high time auto power off, improve the stability that circuit uses, extend the useful life of circuit components and load, whole circuit structure is simple, stable performance.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory is called for short ROM) or random store-memory body (Random Access Memory is called for short RAM) etc.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (10)
1. a protective circuit, is characterized in that, comprising:
Power module, for being described protective circuit and load supplying;
Temperature collect module, is connected with described power module, and the temperature for collecting work region also exports the corresponding signal of telecommunication;
Control module, is connected with described power module and temperature collect module, for receiving the signal of telecommunication corresponding with the temperature of described working region, when the temperature of described working region reaches preset temperature threshold value, exports control signal;
Switch module, is connected respectively with described power module and described load, and is connected with described control module, and for the control signal exported according to described control module, the path controlling described power module and described load disconnects.
2. circuit as claimed in claim 1, is characterized in that, also comprise:
Alarm module, is connected with described control module, for the control signal exported according to described control module, and warning reminding user.
3. circuit as claimed in claim 2, is characterized in that, also comprise:
Voltage transformation module, the input of described voltage transformation module is connected with described power module, output is connected with described temperature collect module and described control module respectively, for by the voltage transitions of described power module being the operating voltage of described temperature collect module and described control module.
4. circuit as claimed in claim 3, it is characterized in that, described temperature collect module comprises temperature sensor, the first current-limiting resistance, the grounding pin ground connection of described temperature sensor, power input pin connects the output of described voltage transformation module, input and output pin connects one end of described first current-limiting resistance, control module described in another termination of described first current-limiting resistance.
5. circuit as claimed in claim 4, it is characterized in that, described control module comprises single-chip microcomputer, the grounding pin ground connection of described single-chip microcomputer, power input pin connects the output of described voltage transformation module, control signal input pin connects described first current-limiting resistance, and control signal output pin connects described switch module.
6. circuit as claimed in claim 5, it is characterized in that, described switch module comprises the second current-limiting resistance, 3rd current-limiting resistance, switching tube, relay, the control signal output pin of described single-chip microcomputer comprises the first output pin, second output pin, described first output pin connects the collector electrode of described switching tube, the emitter of described switching tube connects the coil first end of described relay, the coil second end ground connection of described relay, described second output pin connects one end of described second current-limiting resistance, one end of 3rd current-limiting resistance described in another termination of described second current-limiting resistance, the other end ground connection of described 3rd current-limiting resistance, the common node of described second current-limiting resistance and described 3rd current-limiting resistance connects the base stage of described switching tube.
7. circuit as claimed in claim 6, it is characterized in that, described switch module also comprises the 4th current-limiting resistance, coil second end of relay described in described 4th current-limiting resistance one termination, other end ground connection.
8. circuit as claimed in claim 7, it is characterized in that, described alarm module comprises buzzer, the 5th current-limiting resistance, the control signal output pin of described single-chip microcomputer also comprises the 3rd output pin, 3rd output pin described in described 5th current-limiting resistance one termination, one end of buzzer described in another termination, the other end ground connection of described buzzer.
9. circuit as claimed in claim 8, it is characterized in that, the model of described temperature sensor is DS18B20.
10. circuit as claimed in claim 9, it is characterized in that, the model of described single-chip microcomputer is ATtiny13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310373509.6A CN104427690A (en) | 2013-08-23 | 2013-08-23 | Protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310373509.6A CN104427690A (en) | 2013-08-23 | 2013-08-23 | Protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN104427690A true CN104427690A (en) | 2015-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310373509.6A Pending CN104427690A (en) | 2013-08-23 | 2013-08-23 | Protection circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105517220A (en) * | 2015-11-24 | 2016-04-20 | 芜湖锐芯电子科技有限公司 | LED light protection circuit module |
| CN109696936A (en) * | 2018-12-21 | 2019-04-30 | 益和电气集团股份有限公司 | A kind of temperature and humidity controller, temperature and humidity control device and control method |
| CN111629479A (en) * | 2020-06-11 | 2020-09-04 | 深圳市蓝丝腾科技有限公司 | Power supply for 5G intelligent street lamp |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201656433U (en) * | 2010-02-05 | 2010-11-24 | 国基电子（上海）有限公司 | Overheat protection circuit and electronic equipment using overheat protection circuit |
| CN102354951A (en) * | 2011-09-28 | 2012-02-15 | 上海显恒光电科技股份有限公司 | Temperature protection circuit and method |
| CN202586274U (en) * | 2012-05-16 | 2012-12-05 | 恒业智能安防（深圳）有限公司 | Low-temperature protection circuit of camera |
| CN203135391U (en) * | 2013-01-11 | 2013-08-14 | 罗林 | Smart power protection device |
-
2013
- 2013-08-23 CN CN201310373509.6A patent/CN104427690A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201656433U (en) * | 2010-02-05 | 2010-11-24 | 国基电子（上海）有限公司 | Overheat protection circuit and electronic equipment using overheat protection circuit |
| CN102354951A (en) * | 2011-09-28 | 2012-02-15 | 上海显恒光电科技股份有限公司 | Temperature protection circuit and method |
| CN202586274U (en) * | 2012-05-16 | 2012-12-05 | 恒业智能安防（深圳）有限公司 | Low-temperature protection circuit of camera |
| CN203135391U (en) * | 2013-01-11 | 2013-08-14 | 罗林 | Smart power protection device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105517220A (en) * | 2015-11-24 | 2016-04-20 | 芜湖锐芯电子科技有限公司 | LED light protection circuit module |
| CN109696936A (en) * | 2018-12-21 | 2019-04-30 | 益和电气集团股份有限公司 | A kind of temperature and humidity controller, temperature and humidity control device and control method |
| CN111629479A (en) * | 2020-06-11 | 2020-09-04 | 深圳市蓝丝腾科技有限公司 | Power supply for 5G intelligent street lamp |
| CN111629479B (en) * | 2020-06-11 | 2021-05-18 | 深圳市拉丁曼科技有限公司 | Power supply for 5G intelligent street lamp |
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Application publication date: 20150318 |