CN101286062B - Electromagnetic stove time-limiting automatic switch on and off protection device - Google Patents
Electromagnetic stove time-limiting automatic switch on and off protection device Download PDFInfo
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- CN101286062B CN101286062B CN2008100645345A CN200810064534A CN101286062B CN 101286062 B CN101286062 B CN 101286062B CN 2008100645345 A CN2008100645345 A CN 2008100645345A CN 200810064534 A CN200810064534 A CN 200810064534A CN 101286062 B CN101286062 B CN 101286062B
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Abstract
The invention provides an induction cooker limited-time automatic on/off electric protection device, which is based on a singlechip and a PLC and used for solving the problem that the induction cooker used in railway dining car can not automatically cut off the electricity. A transformer sends a starting work signal to the PLC, converts a transformer output signal into a sampling signal and sends the sampling signal to a main control chip; the PLC starts an internal timer to time the work time and break-time of the induction cooker; the on/off of a power supply circuit of the induction cooker is controlled by a contactor; an infrared human body induction circuit sends a no-man signal to the PLC by a rectifier circuit; the main control chip samples the instant power value of the induction cooker, accumulates the power consumption of the induction cooker; a digital quantity speech alarming signal is sent to a speech alarming circuit; the key information is written into a logic controller; function parameters are selected to be displayed on liquid crystal; and the analog speech alarming signal is sent to an alarm.
Description
Technical field
The present invention relates to a kind of based on single-chip microcomputer and the electromagnetic stove time-limiting automatic switch on and off protection device that can weave into logic controller PLC.
Background technology
The electromagnetic stove that uses on the dining car has that volume is little, energy savings, the flames of anger, characteristics such as smokeless, therefore is widely used in the electric locomotive field.But because need of work, the general continuous working period of electromagnetic stove is longer, and does not possess automatic circuit break function, has reduced serviceable life.In the course of work, generally can only just manually electromagnetic stove be cut off the power supply once, and each power-off time can only be judged with sensation by the cook by dish of the every stir-fry of cook.Most of cooks can the detailed consideration electromagnetic stove continuous working period; cause electromagnetic stove power-off time deficiency easily; electromagnetic stove is not had a rest through shutting down fully; cause reduce greatly its serviceable life, also do not have a kind of control device that has automatic circuit break function and control many electromagnetic stoves simultaneously in the market.
Summary of the invention
The present invention provides a kind of electromagnetic stove time-limiting automatic switch on and off protection device for solve the problem that can not cut off the power supply automatically of the electromagnetic stove existence of using at present on dining car.The present invention includes with lower unit:
Power sensor, when monitoring the working signal of electromagnetic stove, the startup working signal of electromagnetic stove is sent to the PLC programmable logic controller (PLC) by rectification circuit, and by the A/D sample circuit power sensor output signal is converted to the A/D sampled signal simultaneously and sends to main control chip;
The PLC programmable logic controller (PLC), when the electromagnetic stove starting power signal that receives from power sensor, start the working time of timer internal timing electromagnetic stove, after working time finishes, transmit control signal contactor is disconnected, and starting regularly power-off time of timer internal simultaneously, after power-off time finished, transmitting control signal made the contactor adhesive; When the unmanned signal that receives from the infrared human body induction circuit, transmitting control signal disconnects contactor, and sends unmanned signal to main control chip;
Contactor, according to control signal from the PLC programmable logic controller (PLC), the break-make of control electromagnetic stove feed circuit;
The infrared human body induction circuit, in sensing dining car nobody the time, unmanned signal is sent to the PLC programmable logic controller (PLC) by rectification circuit;
Main control chip, when receiving the electromagnetic stove starting power signal from power sensor, the instantaneous power value of the electromagnetic stove that begins to sample, and the power consumption by computing accumulative total electromagnetic stove; When the working time reaches predetermined time of fire alarming, send digital quantity audio alert signal to voice alarm circuit; When the unmanned signal that receives from the PLC programmable logic controller (PLC), send digital quantity audio alert signal to voice alarm circuit; To write in the PLC programmable logic controller (PLC) from the key information of keyboard interface circuit; According to the keyboard input signal of keyboard interface circuit, can select one in working time, consumed power and other functional parameter of clock/calendar, electromagnetic stove on liquid crystal display circuit, to show;
Keyboard interface circuit, the keyboard input signal that the user is imported sends to main control chip;
Liquid crystal display circuit shows the liquid-crystal display information that main control chip sends;
Voice alarm circuit will become analog quantity audio alert signal to send to alarm from the digital quantity audio alert conversion of signals of master control chip.
Beneficial effect: the present invention is the continuous working period of every electromagnetic stove of timing not only, automatically with its outage, and its power-off time regularly regularly finishes the back automatic recovery of power supply after regularly finishing, can guarantee enough power-off times like this, also can avoid the manually trouble of outage of cook; Simultaneously, the present invention also has accumulative total energy value, demonstration time, data storage and human body induction function, when sense dining car nobody the time, the PLC programmable logic controller (PLC) is nobody of dining car regularly time, regularly finish the back automatically with every electromagnetic stove timesharing outage, and pass through alarm equipment alarm, thereby reduced the possibility of breaking out of fire effectively.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present invention.
Embodiment
Embodiment one: referring to Fig. 1, present embodiment is by forming with lower unit:
Power sensor U7, when monitoring the working signal of electromagnetic stove, the startup working signal of electromagnetic stove is sent to PLC programmable logic controller (PLC) U17 by rectification circuit U18, and by A/D sample circuit U6 power sensor U7 output signal is converted to the A/D sampled signal simultaneously and sends to main control chip U13;
PLC programmable logic controller (PLC) U17, when the electromagnetic stove starting power signal that receives from power sensor U7, start the working time of timer internal timing electromagnetic stove, after working time finishes, transmit control signal contactor U14 is disconnected, and starting regularly power-off time of timer internal simultaneously, after power-off time finished, transmitting control signal made contactor U14 adhesive; When the unmanned signal that receives from infrared human body induction circuit U 19, transmitting control signal disconnects contactor U14, and sends unmanned signal to main control chip U13;
Contactor U14, according to control signal from PLC programmable logic controller (PLC) U17, the break-make of control electromagnetic stove feed circuit;
Infrared human body induction circuit U 19, in sensing dining car nobody the time, unmanned signal is sent to PLC programmable logic controller (PLC) U17 by rectification circuit U18;
Main control chip U13, when receiving the electromagnetic stove starting power signal from power sensor U7, the instantaneous power value of the electromagnetic stove that begins to sample, and the power consumption by computing accumulative total electromagnetic stove; When the working time reaches predetermined time of fire alarming, send digital quantity audio alert signal to voice alarm circuit U2; When the unmanned signal that receives from PLC programmable logic controller (PLC) U17, send digital quantity audio alert signal to voice alarm circuit U2; To write from the key information of keyboard interface circuit U4 among the PLC programmable logic controller (PLC) U17; According to the keyboard input signal of keyboard interface circuit U4, can select one in working time, consumed power and other functional parameter of clock/calendar, electromagnetic stove on liquid crystal, to show; Read among the PLC programmable logic controller (PLC) U17 corresponding information every 1 second and send to liquid crystal display circuit U3;
Keyboard interface circuit U4, the keyboard input signal that the user is imported sends to main control chip U13;
Liquid crystal display circuit U3 shows the liquid-crystal display information that main control chip U13 sends;
Voice alarm circuit U2 will become analog quantity audio alert signal to send to alarm U1 from the digital quantity audio alert conversion of signals of master control chip U13.
When electromagnetic stove is started working, power sensor U7 sends to PLC programmable logic controller (PLC) U17 with detected electromagnetic stove power signal by rectification circuit U18, power sensor U7 can adopt CE-P41-33B type power sensor, the power signal that detects electromagnetic stove is promptly represented electromagnetic stove startup work, and PLC programmable logic controller (PLC) U17 begins the regularly continuous working period of electromagnetic stove; After regularly finishing, PLC programmable logic controller (PLC) U17 sends cut-off signal disconnects contactor U14, thereby realizes automatic circuit break function; PLC programmable logic controller (PLC) U17 starts the power-off time timer simultaneously, after breaker timing finishes, sends closure signal and makes contactor U14 adhesive, automatic recovery of power supply.A/D sample circuit U6 sends to main control chip U13 after with the conversion of the output signal of power sensor U7, the main control chip U13 instantaneous power value that begins to sample then, and realize the power consumption function of accumulative total electromagnetic stove by computing; Main control chip U13 will be presented at from the button operation information of keyboard interface circuit U4 on the liquid crystal display circuit U3, can select read clock calendar, electromagnetic stove working time, consumed power value and functional parameter is set simultaneously.In addition, main control chip U13 can also write PLC programmable logic controller (PLC) U17 with work, power-off time parameter, and from PLC programmable logic controller (PLC) U17, read in the working time of every electromagnetic stove, regularly finish preceding 8 minutes when the working time, main control chip U13 sends digital quantity audio alert signal to voice alarm circuit U2, be converted to analog quantity audio alert signal by voice alarm circuit U2 and send to alarm U1, send audio alert signal (countdown of electromagnetic stove power-off time can be set at every 1 minute and report to the police 1 time) by alarm U1.When infrared ray body induction circuit U19 sense dining car nobody the time, unmanned signal is sent to PLC programmable logic controller (PLC) U17 by rectification circuit U18 start unmanned breaker timing device (timing can be set to 1～15 minute adjustable), regularly finish preceding 1 minute, PLC programmable logic controller (PLC) U17 sends signalisation main control chip U13 and sends once unmanned power alarm signal.The present invention can also control many electromagnetic stoves simultaneously by the quantity that increases power sensor.
Embodiment two: referring to Fig. 1, present embodiment has increased on the basis of embodiment one with lower unit:
SD card interface circuit U11 stores the energy value of nobody of every automatic power-off time of electromagnetic stove, dining car and consumption among the SD card U10 into time, and calls information among the SD card U10 according to the requirement of main control chip U13.
SD card U10 and SD card interface circuit U11 constitute SD card storage system, the data of preserving comprise nobody of electric energy aggregate-value, dining car and power-off time three parts automatically time, can understand the ruuning situation of total system for operating personnel and maintainer, increase the security and the operational efficiency of system.
Embodiment three: referring to Fig. 1, present embodiment has increased on the basis of embodiment one with lower unit:
LED light warning circuit U 12 is accepted the alerting signal from main control chip U13, starts the LED light warning.
Join with alarm U1 and use, separately or when alarm U1 lost efficacy, use and to reach the effect of warning the staff.
Claims (3)
1. electromagnetic stove time-limiting automatic switch on and off protection device is characterized in that it comprises with lower unit:
Power sensor (U7), when monitoring the power signal of electromagnetic stove, the startup working signal of electromagnetic stove is sent to PLC programmable logic controller (PLC) (U17) by rectification circuit (U18), and the conversion of signals of by A/D sample circuit (U6) power sensor (U7) being exported simultaneously sends to main control chip (U13) for the A/D sampled signal;
PLC programmable logic controller (PLC) (U17), when the electromagnetic stove starting power signal that receives from power sensor (U7), start the working time of timer internal timing electromagnetic stove, after working time finishes, transmit control signal contactor (U14) is disconnected, and starting regularly power-off time of timer internal simultaneously, after power-off time finished, transmitting control signal made contactor (U14) adhesive; When the unmanned signal that receives from infrared human body induction circuit (U19), start timer internal nobody regularly time, transmitting control signal after regularly finishing disconnects contactor (U14), and sends unmanned signal to main control chip (U13);
Contactor (U14), according to control signal from PLC programmable logic controller (PLC) (U17), the break-make of control electromagnetic stove feed circuit;
Infrared human body induction circuit (U19), in sensing dining car nobody the time, unmanned signal is sent to PLC programmable logic controller (PLC) (U17) by rectification circuit (U18);
Main control chip (U13), when receiving the electromagnetic stove starting power signal from power sensor (U7), the instantaneous power value of the electromagnetic stove that begins to sample, and the power consumption by computing accumulative total electromagnetic stove; When the working time reaches predetermined time of fire alarming, send digital quantity audio alert signal to voice alarm circuit (U2); When the unmanned signal that receives from PLC programmable logic controller (PLC) (U17), send digital quantity audio alert signal to voice alarm circuit (U2); To write from the key information of keyboard interface circuit (U4) in the PLC programmable logic controller (PLC) (U17); According to the keyboard input signal of keyboard interface circuit (U4), can select in working time, consumed power and other functional parameter of clock/calendar, electromagnetic stove one to go up and show at liquid crystal display circuit (U3);
Keyboard interface circuit (U4), the keyboard input signal that the user is imported sends to main control chip (U13);
Liquid crystal display circuit (U3) shows the liquid-crystal display information that main control chip (U13) sends;
Voice alarm circuit (U2) will become analog quantity audio alert signal to send to alarm (U1) from the digital quantity audio alert conversion of signals of master control chip (U13).
2. electromagnetic stove time-limiting automatic switch on and off protection device according to claim 1 is characterized in that it also comprises with lower unit:
SD card interface circuit (U11) stores the energy value of nobody of every automatic power-off time of electromagnetic stove, dining car and consumption in the SD card (U10) into time, and calls information in the SD card (U10) according to the requirement of main control chip (U13).
3. electromagnetic stove time-limiting automatic switch on and off protection device according to claim 1 is characterized in that it also comprises with lower unit:
LED light warning circuit (U12) is accepted the alerting signal from main control chip (U13), starts the LED light warning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100645345A CN101286062B (en) | 2008-05-19 | 2008-05-19 | Electromagnetic stove time-limiting automatic switch on and off protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100645345A CN101286062B (en) | 2008-05-19 | 2008-05-19 | Electromagnetic stove time-limiting automatic switch on and off protection device |
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| Publication Number | Publication Date |
|---|---|
| CN101286062A CN101286062A (en) | 2008-10-15 |
| CN101286062B true CN101286062B (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100645345A Expired - Fee Related CN101286062B (en) | 2008-05-19 | 2008-05-19 | Electromagnetic stove time-limiting automatic switch on and off protection device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102833899B (en) * | 2011-06-17 | 2016-03-09 | 博西华电器（江苏）有限公司 | The intelligent control method of electromagnetic stove and intelligent controlling device |
| CN105071149A (en) * | 2015-08-13 | 2015-11-18 | 何林 | Electromagnetic stove unattended automatic power-off dedicated socket |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5099379A (en) * | 1990-07-31 | 1992-03-24 | Gold Star Co., Ltd. | Surge preventing circuit for electromagnetic induction cooking apparatus |
| CN1470805A (en) * | 2002-07-23 | 2004-01-28 | 广州威纳电子科技有限公司 | Computerized controller for electromagnetic stove |
| CN2697496Y (en) * | 2003-10-09 | 2005-05-04 | 广东银港科技有限公司 | Controller for induction cooker |
| CN201051396Y (en) * | 2007-06-14 | 2008-04-23 | 美的集团有限公司 | Intelligent sound control device of cooking stove |
-
2008
- 2008-05-19 CN CN2008100645345A patent/CN101286062B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5099379A (en) * | 1990-07-31 | 1992-03-24 | Gold Star Co., Ltd. | Surge preventing circuit for electromagnetic induction cooking apparatus |
| CN1470805A (en) * | 2002-07-23 | 2004-01-28 | 广州威纳电子科技有限公司 | Computerized controller for electromagnetic stove |
| CN2697496Y (en) * | 2003-10-09 | 2005-05-04 | 广东银港科技有限公司 | Controller for induction cooker |
| CN201051396Y (en) * | 2007-06-14 | 2008-04-23 | 美的集团有限公司 | Intelligent sound control device of cooking stove |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2004-227804A 2004.08.12 |
| 施敏敏.电磁炉功率控制的实现.常熟理工学院学报(自然科学)22 2.2008,22(2),96-98. |
| 施敏敏.电磁炉功率控制的实现.常熟理工学院学报(自然科学)22 2.2008,22(2),96-98. * |
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Granted publication date: 20100609 Termination date: 20110519 |