CN104280598B - Power supply detection method and detection system for microwave oven - Google Patents
Power supply detection method and detection system for microwave oven Download PDFInfo
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- CN104280598B CN104280598B CN201410480577.7A CN201410480577A CN104280598B CN 104280598 B CN104280598 B CN 104280598B CN 201410480577 A CN201410480577 A CN 201410480577A CN 104280598 B CN104280598 B CN 104280598B
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- 238000001514 detection method Methods 0.000 title claims abstract description 58
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Abstract
The invention relates to a power supply detection method of microwave oven and detection system thereof, wherein a voltage detection circuit samples from strong electricity, and transmits real-time sampling result to a voltage detection processing chip for processing, the voltage detection chip judges whether the current voltage value exceeds the preset normal use voltage range of the equipment, if the current voltage value is within the range, the equipment normally operates, if the current voltage value is not within the normal use range, the current voltage value is judged to be beyond the preset voltage range or lower than the preset voltage range, and simultaneously a control signal is transmitted to a corresponding optical coupler, the optical coupler transmits the isolated signal to a detection port of a main chip, and the optical coupler transmits a corresponding alarm or protection signal after processing by the main chip, thereby realizing the protection of the whole microwave oven. The method realizes real-time and accurate detection of the voltage, improves the use safety of the microwave oven and reduces the cost.
Description
Technical field
The invention belongs to power supply observation and control technology field, and in particular to a kind of power detecting method of micro-wave oven and its detection system
System.
Background technology
At present, the micro-wave oven of in the market is generally linear power supply and Switching Power Supply two schemes, presently most used voltage
Detection method has three kinds：（1）Sampled by from the secondary of linear transformer,（2）After high-precision voltage transformer
Re-sampling,（3）Zero line is shared with functionally, is directly sampled at forceful electric power end；These three schemes can all face security in use
Can reduce, accuracy of detection can be reduced and cost can increase the test of this three aspect, therefore the voltage is designed for problem above
Detection method.
The content of the invention
The technical problem to be solved in the present invention is the power detecting method and its detecting system for carrying a kind of micro-wave oven, the detection
From the point of view of method relative good accuracy voltage transformer, can just realize carrying out voltage accurate inspection in real time without cost too high
Survey, carry out the communication between voltage checking chip and master chip using the photoelectric characteristic of optocoupler in addition, can cleverly realize strong
Isolation between light current, further improves use of microwave ovens security.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of voltage detection method for micro-wave oven, it is characterised in that comprise the following steps：
（1）Voltage detecting circuit detects the magnitude of voltage of circuit from forceful electric power circuit, and testing result is sent in real time
The detection chip of voltage detecting circuit is analyzed；
（2）Whether detection chip judges current voltage value beyond default equipment normal operating range according to testing result；
（3）If magnitude of voltage is in the range of default normal voltage use, the chip does not send alarm signal and gives master control electricity
The master chip on road, micro-wave oven normally runs；
（4）If magnitude of voltage exceeds normal operating range, whether the master chip meeting automatic decision current voltage value of detection circuit
Beyond predetermined voltage range, again below predetermined voltage range, while the master chip by photoelectrical coupler to governor circuit is sent out
Alarm signal is sent, the alarm signal after isolation is transferred to the detection port of master chip by photoelectrical coupler, inside master chip
After judgement treatment, corresponding alarm signal or protection signal are sent, and simultaneously turn off the microwave power device being currently running
Part, so as to realize the protection to the whole machine of micro-wave oven.
Further, the step（2）、（3）Or（4）It is middle to judge whether current voltage value normally makes beyond default equipment
With scope, can also obtain as follows：
（a）By adjusting the resistance value in voltage detecting circuit, realize each photoelectrical coupler under different voltage
The condition that can be turned on；
（b）When voltage is less than normal operating voltage scope, the conducting of the first photoelectrical coupler, three detections of governor circuit
The detection signal that mouth is received is first detection signal；The second photoelectrical coupler conducting when voltage is in normal operation range, it is main
The detection signal for controlling three detection mouths reception of circuit is the second detection signal, the 3rd light after voltage is higher than normal operation range
Electric coupler is just turned on, and the survey signal that now the three of governor circuit detection mouth is received is the 3rd detection signal, and main control chip leads to
Cross and the signal detected by three detection mouths is judged, so as to identify whether current voltage uses in the normal of equipment
In the range of.
（c）When voltage is not in equipment normal operation range, main control chip sends corresponding protection signal, and shut-off is worked as
Before the power device that is currently running, so as to realize the protection to equipment.
It is directed to the detecting system of the voltage detection method of micro-wave oven in method one, including voltage detecting circuit, light thermocouple
Clutch and master chip, the input of the voltage detecting circuit are connected with forceful electric power circuit, the output end and light of voltage detecting circuit
The input of electric coupler is connected, and the output end of photoelectrical coupler is connected with the input of master chip.
The detecting system of the voltage detection method of another micro-wave oven, including three for being connected that are in parallel with forceful electric power circuit
Photoelectric coupling circuit, described each photoelectric coupling circuit is constituted by photoelectrical coupler and two resistance, the photoelectrical coupler
Phototriode with light emitting diode and for the optical signal that the light emitting diode sends to be converted into electric signal；It is described
The grounded emitter of the phototriode of each termination power, its colelctor electrode point two-way, wherein all the way through resistance and high level phase
Even, another road is connected with the master chip in micro-wave oven, and the output end of the outside source is through current-limiting resistance and described luminous two
Pole pipe is electrically connected.
As shown from the above technical solution, up-sampled from forceful electric power by voltage detecting circuit, and real-time sampled result is transmitted
Processed to voltage detecting process chip, judged whether current voltage value is exceeding default equipment just by voltage checking chip
Voltage range often is used, equipment is normally run if in the range of, if not in normal operating range, then judge current
Magnitude of voltage is above predetermined voltage range, again below predetermined voltage range, while corresponding optocoupler transmission of control signals is given, by
Signal transmission after isolation to the detection port of master chip, is sent corresponding alarm or protection letter by optocoupler after being processed through master chip
Number, realize the protection to the whole machine of micro-wave oven.The method achieve carries out accurate detection in real time to voltage, improves micro-wave oven
Safety in utilization, reduces cost.
Brief description of the drawings
Fig. 1 is the system block diagram of the first implementation method of the invention；
Fig. 2 is the circuit diagram of second implementation method of the invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Embodiment one：
As shown in figure 1, a kind of voltage detection method of micro-wave oven, including voltage detecting circuit, photoelectrical coupler and main core
Piece, the input of voltage detecting circuit is connected with forceful electric power circuit, the output end of voltage detecting circuit and the input of photoelectrical coupler
End is connected, and the output end of photoelectrical coupler is connected with the input of master chip.Up-sampled from forceful electric power circuit by voltage detecting circuit,
And send real-time sampled result at voltage detecting chip and processed, current voltage value is judged by voltage checking chip
Whether voltage range is normally used beyond default equipment, if in the range of default normal voltage use, micro-wave oven is just
Often operation；If exceeding normal operating range, continuation judges that current voltage value is above predetermined voltage range, again below default
Voltage range, while giving corresponding optocoupler transmission of control signals.By optocoupler by the signal transmission after isolation to master chip detection
Port, sends corresponding alarm or protection signal after being processed through master chip, so as to realize the protection to the whole machine of micro-wave oven, in addition by
In voltage detecting circuit in have chip, it is also possible to current magnitude of voltage is converted into by square-wave signal by software algorithm, is passed through
Master chip is passed to after light-coupled isolation again, is so not only able to realize the protection later to the working voltage over range of whole machine, and
And current operating voltage can also be in real time detected, microwave power just can more accurately be exported by software algorithm.Should
Master chip can be single-chip microcomputer, microwave oven internal chip or other programmable chips.The voltage detecting circuit is any voltage detecting
Circuit all can be used.
Embodiment two：
As shown in Fig. 2 a kind of detecting system of the voltage detection method of micro-wave oven, including it is in parallel with forceful electric power circuit and is connected
Three photoelectric coupling circuits, each photoelectric coupling circuit constitutes by photoelectrical coupler and two resistance, photoelectric coupling utensil
There are light emitting diode and the phototriode for the optical signal that the light emitting diode sends to be converted into electric signal.First light
The grounded emitter of electric coupler U1, its colelctor electrode point two-way, connects high level through first resistor R4 all the way, and another road connects main core
Piece, the output end of outside forceful electric power signal source is electrically connected through current-limiting resistance R1 with light emitting diode；The hair of the second photoelectrical coupler U2
Emitter grounding, its colelctor electrode point two-way, connects high level through second resistance R5 all the way, and another road connects master chip, outside forceful electric power signal
The output end in source is electrically connected through current-limiting resistance R2 with the light emitting diode of the second photoelectrical coupler U2；3rd photoelectrical coupler U3's
Grounded emitter, its colelctor electrode point two-way connects high level through second resistance R6 all the way, and another road connects master chip, outside forceful electric power letter
The output end in number source is electrically connected through current-limiting resistance R3 with the light emitting diode of the second photoelectrical coupler U3.
Embodiment two is the reduction procedure of embodiment one, is made using three groups of circuits of the optocouplers composition of Different matching parameter
Used for voltage detecting circuit, these three circuits are connected on the same position of forceful electric power circuit, by adjusting in these three circuits
The resistance of resistance R1, R2, R3, realizes the condition that each optocoupler can be turned under different voltage, when voltage is less than normal
Only have the optocoupler U1 being capable of normally during working voltage scope, then the detection signal that three detection mouths of governor circuit are received
It is 011, when voltage is in normal operation range, optocoupler U2 is just turned on, the inspection that now the three of governor circuit detection mouth is received
It is 001 to survey signal, and optocoupler U3 is just turned on after voltage is higher than normal operation range, and now the three of governor circuit detection mouth is received
The detection signal for arriving is 000, and main control chip is sentenced by the signal detected by three detection mouths, current so as to identify
Voltage whether in the normal operating range of equipment, when voltage is not after equipment normal operation range, main control chip is just sent out
Go out corresponding protection signal, and turn off the power device being currently running, so as to realize the protection to equipment.
Implementation method above is intended merely to the explanation present invention, and is not used as being limitation of the invention, as long as at this
Within the spirit of invention, the appropriate change and change made to above example all fall claimed
Within the scope of.
Claims (3)
1. a kind of voltage detection method for micro-wave oven, it is characterised in that comprise the following steps：
（1）Voltage detecting circuit detects the magnitude of voltage of circuit from forceful electric power circuit, and sends testing result to voltage in real time
Detect that the detection chip of circuit is analyzed；
（2）Whether detection chip judges current voltage value beyond default equipment normal operating range according to testing result；
（3）If magnitude of voltage is in the range of default normal voltage use, the chip does not send alarm signal to governor circuit
Master chip, micro-wave oven normally runs；
（4）If magnitude of voltage exceeds normal operating range, detect whether the master chip meeting automatic decision current voltage value of circuit exceeds
Predetermined voltage range, again below predetermined voltage range, while the master chip by photoelectrical coupler to governor circuit sends report
Alert signal, the alarm signal after isolation is transferred to the detection port of master chip by photoelectrical coupler, through master chip internal judgment
After treatment, corresponding alarm signal or protection signal are sent, and simultaneously turn off the microwave power device being currently running, from
And realize the protection to the whole machine of micro-wave oven；
The step（2）、（3）Or（4）It is middle whether to judge current voltage value beyond default equipment normal operating range, can be with
Obtain as follows：
（a）By adjusting the resistance value in voltage detecting circuit, realize that each photoelectrical coupler can under different voltage
The condition of conducting；
（b）When voltage is less than normal operating voltage scope, the first photoelectrical coupler（U1）Conducting, three detections of governor circuit
The detection signal that mouth is received is first detection signal；The second photoelectrical coupler when voltage is in normal operation range（U2）Lead
Logical, the detection signal that three detection mouths of governor circuit are received is the second detection signal, when voltage is higher than normal operation range
3rd photoelectrical coupler afterwards（U3）Just turn on, the detection signal that now the three of governor circuit detection mouth is received is the 3rd detection
Whether signal, main control chip judges by the signal detected by three detection mouths, so as to identify current voltage
In the normal operating range of equipment；
（c）When voltage is not in equipment normal operation range, main control chip sends corresponding protection signal, and shut-off is current just
In the power device of operation, so as to realize the protection to equipment.
2. the detecting system of the voltage detection method of a kind of micro-wave oven according to claim 1, it is characterised in that：Including electricity
Pressure detection circuit, photoelectrical coupler and master chip, the input of the voltage detecting circuit are connected with forceful electric power circuit, voltage detecting
The output end of circuit is connected with the input of photoelectrical coupler, and the output end of photoelectrical coupler is connected with the input of master chip.
3. the detecting system of the voltage detection method of a kind of micro-wave oven according to claim 2, it is characterised in that：Including with
Three photoelectric coupling circuits that forceful electric power circuit is in series connected, described each photoelectric coupling circuit is by photoelectrical coupler and two
Resistance is constituted, and the photoelectrical coupler has light emitting diode and for the optical signal that the light emitting diode sends to be converted into
The phototriode of electric signal；The grounded emitter of the phototriode of each termination power, its colelctor electrode point two-way, its
In be connected with high level through resistance all the way, another road is connected with the master chip in micro-wave oven, the output end of voltage detecting circuit warp
Current-limiting resistance is electrically connected with the light emitting diode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410480577.7A CN104280598B (en) | 2014-09-19 | 2014-09-19 | Power supply detection method and detection system for microwave oven |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410480577.7A CN104280598B (en) | 2014-09-19 | 2014-09-19 | Power supply detection method and detection system for microwave oven |
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| CN104280598B true CN104280598B (en) | 2017-06-20 |
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| CN109459605B (en) * | 2018-03-07 | 2021-01-29 | 国网浙江省电力公司丽水供电公司 | Real-time monitoring method for bus voltage of substation |
| CN111983298B (en) * | 2020-08-24 | 2023-03-17 | 南京磐能电力科技股份有限公司 | Switching value acquisition circuit and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2831143Y (en) * | 2005-06-29 | 2006-10-25 | 海尔集团公司 | Strong voltage detection circuit |
| CN1979006A (en) * | 2005-11-30 | 2007-06-13 | 海尔集团公司 | Microwave-oven power-supply voltage monitoring circuit and method for protecting abnormal power-supply voltage |
| CN102244413A (en) * | 2010-05-10 | 2011-11-16 | 北京京煤集团总医院 | Automatic maintenance device for standby battery of uninterruptible power system (UPS) |
| CN102866278A (en) * | 2012-06-28 | 2013-01-09 | 深圳市汇川技术股份有限公司 | Output voltage detecting circuit for frequency changer and frequency changer |
| CN103187776B (en) * | 2013-04-15 | 2015-10-21 | 南车株洲电力机车有限公司 | Voltage balance circuit of super-capacitor module |
| CN103308756A (en) * | 2013-06-14 | 2013-09-18 | 浙江海振电子科技有限公司 | Frequency changer voltage detection circuit |
| CN103515802A (en) * | 2013-09-09 | 2014-01-15 | 深圳市智远能科技有限公司 | Intelligentized switch socket and intelligent switch power strip |
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Address after: 230000 science and technology zone, Hefei, Anhui, No. 96 Applicant after: Whirlpool (China) Limited by Share Ltd Address before: 230000 science and technology zone, Hefei, Anhui, No. 96 Applicant before: Hefei Rongshida Sanyo Electric Co., Ltd. |
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