CN108347800A - Microwave heating equipment and detection method - Google Patents
Microwave heating equipment and detection method Download PDFInfo
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- CN108347800A CN108347800A CN201810096517.3A CN201810096517A CN108347800A CN 108347800 A CN108347800 A CN 108347800A CN 201810096517 A CN201810096517 A CN 201810096517A CN 108347800 A CN108347800 A CN 108347800A
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- microwave
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- heating equipment
- analog signal
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/6432—Aspects relating to testing or detecting leakage in a microwave heating apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The present invention proposes a kind of microwave heating equipment, including：Microwave generator, for generating incidence wave；Cavity has multiple cavity walls；At least one detection hole is arranged in the arbitrary cavity wall of multiple cavity walls；At least one detector arrangement, each detector arrangement are arranged in a detection hole, for detecting the back wave reflected by cavity wall and generating the analog signal corresponding to back wave.Technical solution through the invention, the analog signal of the back wave of cavity wall reflection is obtained by least one detector arrangement at least one detection hole in microwave heating equipment cavity wall, and the microwave state of microwave heating equipment is judged according to the analog signal of back wave, it is convenient and efficient, operability is high, and cost is relatively low.
Description
Technical field
The present invention relates to microwave technical fields, and relate more specifically to a kind of microwave heating equipment and a kind of detection side
Method.
Background technology
Existing microwave magnetron stove does not judge that the function of microwave feed-in situation, magnetron generate electromagnetic wave, pass through wave
It leads and is fed directly into microwave cavity body, for the absorbing state of microwave in cavity, have areflexia etc. and can not judge, can not effectively examine
Survey the microwave state in microwave magnetron stove.
In addition in the prior art, exist by increasing coupling device in waveguide, to judge the inspection of microwave input and reflection
Device is surveyed, but since cost is higher, is typically employed in the military use products such as Radar-Communication, cannot achieve general in the product for civilian use
And.
Invention content
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
In view of this, it is an object of the present invention to provide a kind of microwave heating equipments.
It is another object of the present invention to provide a kind of detection methods.
To achieve the goals above, the technical solution of first aspect present invention provides a kind of microwave heating equipment, including：
Microwave generator, for generating incidence wave；Cavity has multiple cavity walls；Appointing in multiple cavity walls is arranged at least one detection hole
In cavity wall of anticipating；At least one detector arrangement, each detector arrangement be arranged in a detection hole, is reflected by cavity wall for detecting
Back wave simultaneously generates the analog signal for corresponding to back wave.
In the technical scheme, microwave generator generation incidence wave, incidence wave feed-in inside cavity, and by the cavity wall of cavity
Back wave is reflected to form, there are when back wave in the detection hole in cavity wall, detector arrangement is coupled to reflected energy, and produces
The raw analog signal corresponding to back wave, to realize the detection to cavity wall back wave, wherein analog signal be voltage signal or
Current signal.Wherein it is possible to understand, the quantity of detection hole is more, i.e., detection hole is more intensive, the corresponding detector arrangement of detection hole
More intensive, the range detected to ejected wave in cavity is bigger, higher to the accuracy of detection of the overall distribution of cavity reflected waves.This skill
Art scheme is easy to detect to back wave quick, and operability is high, and cost is relatively low.
In the above-mentioned technical solutions, it is preferable that further include：Control unit is connect with whole detector arrangements, is received from every
Each analog signal of a detector arrangement, the microwave state for determining microwave heating equipment according to each analog signal.
In the technical scheme, for microwave heating equipment, in a transient state, the incidence wave part in feed-in cavity
It is absorbed by heating target, a part of then reflect cavity, another part then reflects to form back wave by cavity wall；By cavity wall reflection
A back wave part is absorbed by heating target, and a part reflects cavity, and another part is then continued to be reflected by cavity wall, be followed with this
Ring, until reflected energy exhausts and do not continue to be reflected by cavity wall.Therefore, whithin a period of time, the incidence wave in feed-in cavity
Two parts can be divided into, a part is absorbed by heating target, and another part is reflected cavity, and absorbed by heating target
Power can be quantified as being distributed on multiple Microwave emission points in cavity wall, and the microwave of Microwave emission point transmitting is all by heating pair
As absorbing, the power that the field strength of the microwave field at cavity cavity wall is absorbed with heating target at this time is proportionate, and by reflection
The judgement of wave property can determine the field strength of the microwave field at cavity wall, therefore by the detection to back wave, may be implemented pair plus
The detection of heat target absorbed power.
Therefore, after control unit receives each analog signal of each detector arrangement, control unit can be according to each mould
Intend signal to judge the field strength of each detector arrangement position, and then can be right according to the field strength on multiple cavity wall surfaces
The absorbed power that heating target absorbs microwave is judged, then according to the incident work(of the absorbed power of heating target and incidence wave
Rate and microwave reflection go out the relationship between the reflection power of cavity, go out cavity to the incident power and microwave reflection of incidence wave
Reflection power is judged.
At the same time it can also according to the absorbed power that pre-stored characteristic value is absorbed with heating target in control unit, enter
The incident power of ejected wave and microwave reflection go out the correspondence between the reflection power of cavity, to the absorbed power of heating target,
The reflection power that the incident power of incidence wave and microwave reflection go out cavity is judged.The input signal of characteristic value unit in order to control
Or the signal obtained after control unit operation.
Further, it is compared by the field strength to each detector arrangement position, can judge microwave in cavity
Whether field is uniform.
In the above-mentioned technical solutions, it is preferable that further include：At least one AD conversion unit is respectively connected to each inspection
Digital signal for being digital signal by analog-signal transitions, and is sent to control unit by wave apparatus.
In the technical scheme, AD conversion unit is connect with each detector arrangement, the simulation that each detector arrangement generates
Signal is converted to digital signal through AD conversion unit, and digital signal is sent to control unit by subsequent AD conversion unit, control
Unit processed receives the digital signal of AD conversion unit and determines the microwave of microwave heating equipment according to the digital signal received
State.AD conversion unit, which converts analog signals into digital signal, can reduce the calculation amount of control unit, and then raising pair
The microwave state of microwave heating equipment constant speed degree really.
In the above-mentioned technical solutions, it is preferable that further include：At least one adder, each adder and at least one inspection
All or part of detector arrangement connection in wave apparatus, adder is used for will be from each simulation of all or part of detector arrangement
Signal is cumulative；At least one proportioner, each proportioner connects at least one adder, after proportioner is used to add up adder
Analog signal zoom to less than pre-set threshold value, and the analog signal after scaling is sent to control unit.
In the technical scheme, each adder connects with all or part of detector arrangement at least one detector arrangement
Connect, each analog signal from the detector arrangement being connect with adder added up, and will it is cumulative after analog signal be sent to
Proportioner, the analog signal after proportioner will add up zooms to less than pre-set threshold value, so that analog signal is adapted to control unit,
And the analog signal after scaling is sent to control unit.By the technical program, the simulation of multiple detector arrangements can be believed
It number merges, reduces the calculation amount of control unit, improve to the microwave state of microwave heating equipment constant speed degree really.
Wherein it is preferred to which each cavity wall corresponds to an adder, adder is connect with whole detector arrangements in cavity wall.
In the above-mentioned technical solutions, it is preferable that when detection hole is multiple, multiple detection holes are uniformly distributed in cavity wall.
In the technical scheme, when detection hole is multiple, multiple detection holes are uniformly distributed in cavity wall, i.e., detector arrangement exists
It is uniformly distributed in cavity wall, convenient for whether uniformly judging microwave field in cavity.
In the above-mentioned technical solutions, it is preferable that detection hole is round hole.
In the technical scheme, circular detection hole is convenient for microwave multiple reflections in detection hole, and then makes detector arrangement
It is easier to be coupled to reflected energy, back wave is detected convenient for detector arrangement.
In the above-mentioned technical solutions, it is preferable that the diameter of detection hole and the frequency dependence of back wave.
In the technical scheme, it is serious to cross conference leaky wave for the diameter of detection hole, exceeds national standard, therefore, detection hole is straight
Diameter is no more than the spread speed and 1/10th of reflection wave frequency ratio of back wave, i.e., the diameter of detection hole is no more than back wave
/ 10th of wavelength, to reduce, because detecting, bore dia is excessive to lead to the serious possibility of leaky wave.
The technical solution of second aspect of the present invention provides a kind of detection method, for any one of first aspect technical solution
In microwave heating equipment, including：By at least one at least one detection hole in microwave heating equipment cavity wall
Detector arrangement obtains the analog signal for the back wave for corresponding to cavity wall reflection, and analog signal is sent to AD conversion unit；
AD conversion unit converts analog signals into digital signal, and digital signal is sent to control unit；Control unit receives
Digital signal and the microwave state that microwave heating equipment is determined according to digital signal.
In the technical scheme, first by least one detection hole in microwave heating equipment cavity wall at least
One detector arrangement obtains the analog signal of the back wave of cavity wall reflection, it will be understood that the characteristic of analog signal reflects reflection
Analog signal is sent to AD conversion unit by the characteristic of wave, subsequent detector arrangement.AD conversion unit receives detector arrangement
Analog signal is sent to control unit after the analog signal of reception is converted to digital signal, since digital signal corresponds to mould
Quasi- signal, therefore the characteristic of digital signal is also corresponding with the characteristic of back wave, control unit receives the number of AD conversion unit
Signal, since the characteristic of digital signal and the characteristic of back wave are corresponding, control unit is determined according to the digital signal of reception
The characteristic of back wave, and then the microwave state of the characteristic microwave heating device according to back wave, or it is true according to the characteristic of back wave
Determine the field strength of microwave field near cavity wall, and then determines the microwave state of microwave heating equipment according to the field strength of microwave field.Microwave adds
The microwave state of thermal includes but not limited to the incident power of incidence wave in microwave heating equipment cavity, internal heating target
The uniformity of heating power, the reflection power that microwave goes out from cavity internal reflection and microwave field.
In the above-mentioned technical solutions, it is preferable that further include：By adder by least one detector arrangement whole or
Each analog signal of part detector arrangement adds up, and accumulation result is sent to proportioner；After proportioner reception is cumulative
Analog signal, will it is cumulative after analog signal zoom to less than being sent to control unit after pre-set threshold value.
In the technical scheme, after detector arrangement generates the analog signal corresponding to back wave, multiple detector arrangements will
Analog signal is sent in an adder, and adder receives analog signal, and ratio is sent to after the analog signal of reception is added up
In example device, proportioner adds the analog signal of adder, and the analog signal of reception is zoomed to less than pre-set threshold value, so that mould
Quasi- signal is adapted to control unit, and the analog signal after scaling is then sent to control unit, and control unit receives proportioner
Analog signal and the microwave state of microwave heating equipment is determined according to the analog signal of reception.It, can by the technical program
The analog signal of multiple detector arrangements is merged, the calculation amount of control unit is reduced, is improved to the micro- of microwave heating equipment
Wavy state constant speed degree really.
Wherein it is preferred to which each cavity wall corresponds to an adder, adder receives the mould of whole detector arrangements in cavity wall
Quasi- signal.
In the above-mentioned technical solutions, it is preferable that control unit receives digital signal and determines that microwave adds according to digital signal
The microwave state of thermal, specifically includes：Control unit determines the matching degree of digital signal and preset number signal；Control unit
It determines the corresponding default microwave state of the maximum preset number signal of matching degree, is the microwave state of microwave heating equipment.
In the technical scheme, after the digital signal of control unit reception AD conversion unit, the number that will be received is believed
It number is matched with the multiple digital signals that prestore to prestore in control unit.And determine digital signal and multiple digital signals that prestore
Between matching degree, it will be understood that the matching degree of digital signal and the digital signal that prestores is higher, the corresponding wavy of digital signal
The state microwave state that prestores corresponding with the digital signal that prestores is closer, accordingly, it is determined that the maximum preset number signal pair of matching degree
The default microwave state answered, as the microwave state of microwave heating equipment, to realize to the microwave state of microwave heating equipment
It determines.
In the above-mentioned technical solutions, it is preferable that further include：Control unit determines that multiple detector arrangements correspond in predeterminable area
Multiple target number signals, and determine the matching degree between any two target number signal；If any two target number
Matching degree between signal is more than preset matching degree, then control unit determines even microwave distribution in predeterminable area.
In the technical scheme, it after the digital signal of control unit reception AD conversion unit, determines in predeterminable area
The corresponding digital signal of the analog signal of multiple detector arrangements and multiple detector arrangements, obtains target number signal, then really
Determine the matching degree between any two target number signal, it will be understood that matching degree is higher, and the characteristic of target number signal gets over phase
Seemingly, since the characteristic of target number signal and the characteristic of back wave are corresponding, two high digital signals of matching degree are corresponding
The characteristic of the back wave of two detector arrangement positions is also more similar, thus the characteristic of two position back waves is closer；If
Matching degree between any two target number signal is more than preset matching degree, at this time any two detector arrangement in predeterminable area
The characteristic of the back wave of position is closer to, and is also closer to the associated other microwaves of back wave, and control is single at this time
Member determines even microwave distribution in predeterminable area.
The additional aspect and advantage of the present invention will become apparent in following description section, or practice through the invention
Recognize.
Description of the drawings
Fig. 1 shows the part-structure exploded view of microwave heating equipment according to an embodiment of the invention；
Fig. 2 shows the schematic diagrames of the detector arrangement of part A in Fig. 1；
Fig. 3 shows the structural schematic diagram of microwave heating equipment partial devices according to an embodiment of the invention；
Fig. 4 shows the structural schematic diagram of microwave heating equipment partial devices according to an embodiment of the invention；
Fig. 5 shows the structural schematic diagram of microwave heating equipment partial devices according to an embodiment of the invention；
Fig. 6 shows the flow diagram of detection method according to an embodiment of the invention；
Fig. 7 shows the flow diagram of detection method according to an embodiment of the invention；
Fig. 8 shows the flow diagram of detection method according to an embodiment of the invention.
Wherein, the correspondence in Fig. 1 to Fig. 5 between reference numeral and component names is：
10 microwave heating equipments, 102 cavitys, 1024 cavity walls, 104 detector arrangements, 106 control units, 108 analog-to-digital conversion lists
Member, 110 adders, 112 proportioners, 114 amplifiers.
Specific implementation mode
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Mode is applied the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be implemented different from other modes described here using other, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
As shown in Figure 1 to Figure 3, the embodiment of first aspect present invention provides a kind of microwave heating equipment 10, including：It is micro-
Wave producer, for generating incidence wave；Cavity 102 has multiple cavity walls 1024, as depicted in figs. 1 and 2, the two of cavity 102
It is respectively provided with 9 detection holes in a cavity wall 1024, is set in each detection hole there are one detector arrangement 104, detector arrangement 104 is used to examine
It surveys the back wave reflected by cavity wall 1024 and generates the analog signal corresponding to back wave；Cavity wall 1024 equipped with detection hole is each right
An adder 110 is answered, as shown in figure 3, adder 110 is connect with 9 detector arrangements 104 in cavity wall 1024, each addition
Device 110 is connect with a proportioner 112, and proportioner 112 is connect with control unit 106, and detector arrangement 104 generates analog signal
Analog signal is sent to adder 110 afterwards, adder 110 adds up 9 analog signals of reception after receiving analog signal, and
Will it is cumulative after analog signal be sent to proportioner 112, proportioner 112 receives the analog signal of adder 110 and by reception
Analog signal zooms to less than after pre-set threshold value, being sent to control unit 106, and control unit 106 is according to the analog signal of reception
Determining the microwave state of microwave heating equipment 10, wherein detection hole is uniformly distributed in cavity wall 1024 and detection hole is round hole,
Detector arrangement 104 generates analog voltage signal, and the detector arrangement 104 in the present embodiment is detector diode.
In this embodiment, microwave generator generates incidence wave, inside incidence wave feed-in cavity 102, and by cavity 102
Cavity wall 1024 reflects to form back wave, and there are when back wave in the detection hole in cavity wall 1024, detector arrangement 104 is coupled to
Reflected energy, and the analog voltage signal corresponding to back wave is generated, to realize the detection to 1024 back wave of cavity wall, with
Analog voltage signal is sent in adder 110 by post-detection device 104, and adder 110 receives 9 inspections in same cavity wall 1024
9 analog voltage signals of wave apparatus 104, and 9 analog voltage signals are added up, subsequent adder 110 will it is cumulative after mould
Quasi- voltage signal is sent to proportioner 112, and proportioner 112 receives the analog voltage signal of adder 110, by the simulation electricity of reception
Pressure signal zooms to less than being sent to control unit 106 after pre-set threshold value, it will be understood that pre-set threshold value depends on control unit
106 voltage signal input requirements, pre-set threshold value is 5V in the present embodiment, and input control unit can be realized by proportioner 112
106 analog voltage signal is adapted to control unit 106.
For microwave heating equipment 10, in a transient state, the incidence wave part in feed-in cavity 102 is by heating target
It absorbs, a part of then reflect cavity 102, another part then reflects to form back wave by cavity wall 1024；It is reflected by cavity wall 1024
A back wave part absorbed by heating target, a part reflects cavity 102, and another part then continues anti-by cavity wall 1024
It penetrates, until reflected energy exhausts and do not continue to be reflected by cavity wall 1024.Therefore, whithin a period of time, in feed-in cavity 102
Incidence wave can be divided into two parts, and a part is absorbed by heating target, and another part is reflected cavity 102, and is heated
The power that object absorbs can be quantified as being distributed on multiple Microwave emission points in cavity wall 1024, and Microwave emission point emits micro-
Wave is all absorbed by heating target, the power that the field strength of the microwave field at 102 cavity wall 1024 of cavity is absorbed with heating target at this time
It is proportionate, and by the judgement to reflection characteristics, it can determine the field strength of the microwave field at cavity wall 1024, therefore by right
The detection to heating target absorbed power may be implemented in the detection of back wave.
Therefore, after the analog voltage signal of the reception of control unit 106 proportioner 112, control unit 106 can be according to each
Analog voltage signal judges the field strength of 104 position of each detector arrangement, and then can be according to multiple cavity walls 1024
The field strength on surface, to heating target absorb microwave absorbed power judge, then according to the absorbed power of heating target with
The incident power of incidence wave and microwave reflection go out the relationship between the reflection power of cavity 102, to the incident power of incidence wave
The reflection power for going out cavity 102 with microwave reflection is judged.
At the same time it can also absorbed according to pre-stored characteristic value in control unit 106 and heating target absorbed power,
The incident power of incidence wave and microwave reflection go out the correspondence between the reflection power of cavity 102, the absorption to heating target
The reflection power that power, the incident power of incidence wave and microwave reflection go out cavity 102 is judged.Characteristic value is in the present embodiment
The input voltage signal of control unit 106.
Further, it is compared by the field strength to 104 position of each detector arrangement, can judge cavity 102
Whether interior microwave field is uniform.
As shown in figure 4, in one embodiment of the invention, it is preferable that microwave heating equipment 10 is filled including multiple detections
Set 104；Adder 110, adder 110 are connect with whole detector arrangements 104, and detector arrangement 104 is generated corresponding to back wave
After analog signal, analog signal is sent in adder 110；Proportioner 112, each adder 110 connect with proportioner 112
It connects, adder 110 is sent to after the analog signal of reception adds up in proportioner 112, and proportioner 112 will come from adder 110
Analog signal zoom to less than pre-set threshold value, and the analog signal after scaling is sent to AD conversion unit 108, modulus turns
It changes after the analog signal of proportioner 112 is converted to digital signal by unit 108 and is sent to control unit 106, wherein the present embodiment
Middle detector arrangement 104 generates the analog current signal corresponding to back wave.
In this embodiment, by least one detection hole in 10 cavity wall 1024 of microwave heating equipment at least
One detector arrangement 104 obtains the analog current signal for the back wave that cavity wall 1024 reflects, it will be understood that analog current signal
Characteristic, reflects the characteristic of back wave, and analog current signal is sent to adder 110, adder by subsequent detector arrangement 104
110 receive the analog current signal of whole detector arrangements 104 in cavity wall 1024, are sent after the analog current signal of reception is added up
Into proportioner 112, proportioner 112 adds the analog current signal of adder 110, and the analog current signal of reception is scaled
To less than pre-set threshold value then believes the analog current after scaling so that analog current signal is adapted to AD conversion unit 108
It number is sent to AD conversion unit 108, analog current signal is converted to digital current signal by AD conversion unit 108, and will
Digital current signal is sent to control unit 106, and analog current signal is converted to digital current signal by AD conversion unit 108
It can reduce the calculation amount of control unit 106, and then improve to the microwave state of microwave heating equipment 10 constant speed degree really.
As shown in figure 5, in one embodiment of the invention, it is preferable that microwave heating equipment 10 is filled including multiple detections
104 are set, each detector arrangement 104 is connect with an amplifier 114, and each amplifier 114 is connect with analog to digital conversion circuit, modulus
Converting unit 108 is connect with control unit 106, and after detector arrangement 104 generates the analog signal corresponding to back wave, simulation is believed
It number is sent in amplifier 114, it, will be amplified after amplifier 114 is amplified the analog signal from detector arrangement 104
Analog signal is sent in AD conversion unit 108, and AD conversion unit 108 will be converted from the analog signal of amplifier 114
To be sent to control unit 106 after digital signal, wherein in the present embodiment, detector arrangement 104 generates the mould corresponding to back wave
Quasi- voltage signal.
In this embodiment, by least one detection hole in 10 cavity wall 1024 of microwave heating equipment at least
One detector arrangement 104 obtains the analog voltage signal for the back wave that cavity wall 1024 reflects, and analog voltage signal is sent to
In amplifier 114, AD conversion unit is sent to after the analog voltage signal amplification of amplifier self-test in 114 future wave apparatus 104
In 108, AD conversion unit 108 is sent to after the analog voltage signal from amplifier 114 is converted to digital voltage signal
Control unit 106, control unit 106 receive the digital voltage signal of AD conversion unit 108 and are sentenced according to digital voltage signal
The microwave state of disconnected microwave heating equipment 10.The analog voltage signal of detector arrangement 104 is amplified by amplifier 114,
The detection to back wave can be still realized when back wave is weaker, increase the applicability of detector arrangement 104.
As shown in fig. 6, the embodiment of second aspect of the present invention provides a kind of detection method, for any one of first aspect
Microwave heating equipment 10 in embodiment, including：Step S602, by 10 cavity wall 1024 of microwave heating equipment at least
At least one detector arrangement 104 in one detection hole obtains the analog signal for corresponding to the back wave that cavity wall 1024 reflects, and
Analog signal is sent to AD conversion unit 108；Step S604, AD conversion unit 108 convert analog signals into number
Signal, and digital signal is sent to control unit 106；Step S606, control unit 106 receive digital signal and according to numbers
Signal determines the microwave state of microwave heating equipment 10.Wherein, in the present embodiment, detector arrangement 104, which generates, corresponds to back wave
Analog voltage signal.
In this embodiment, step S602 passes through at least one detection in 10 cavity wall 1024 of microwave heating equipment
At least one detector arrangement 104 in hole obtains the analog voltage signal for the back wave that cavity wall 1024 reflects, it will be understood that simulation
The characteristic of voltage signal, reflects the characteristic of back wave, and analog voltage signal is sent to analog-to-digital conversion by subsequent detector arrangement 104
Unit 108.Step S604, AD conversion unit 108 receive the analog voltage signal of detector arrangement 104, by the simulation electricity of reception
Pressure signal is sent to control unit 106 after being converted to digital voltage signal, since digital voltage signal is believed corresponding to analog voltage
Number, therefore the characteristic of digital voltage signal is also corresponding with the characteristic of back wave, step S606, control unit 106 receives modulus and turns
The digital voltage signal for changing unit 108, since the characteristic of digital voltage signal and the characteristic of back wave are corresponding, control unit
106 determine the characteristic of back wave according to the digital voltage signal of reception, and then according to the characteristic microwave heating device 10 of back wave
Microwave state, specifically, for microwave heating equipment 10, in a transient state, the incidence wave in feed-in cavity 102 one
It point is absorbed by heating target, a part of then reflect cavity 102, another part then reflects to form back wave by cavity wall 1024；Quilt
The back wave part that cavity wall 1024 reflects is absorbed by heating target, and a part reflects cavity 102, and another part then continues quilt
Cavity wall 1024 reflects, until reflected energy exhausts and do not continue to be reflected by cavity wall 1024.Therefore, whithin a period of time, feed-in
Incidence wave in cavity 102 can be divided into two parts, and a part is absorbed by heating target, and another part is reflected cavity
102, and can be quantified as being distributed on multiple Microwave emission points in cavity wall 1024, microwave hair by the power that heating target absorbs
The microwave of exit point transmitting is all absorbed by heating target, at this time the field strength of the microwave field at 102 cavity wall 1024 of cavity and heating pair
As the power of absorption is proportionate, and by the judgement to reflection characteristics, the field of the microwave field at cavity wall 1024 can determine
By force, therefore by the detection to back wave, the detection to heating target absorbed power may be implemented.
Therefore, after control unit 106 receives each analog voltage signal of each detector arrangement 104, control unit 106
The field strength of 104 position of each detector arrangement is judged according to each analog voltage signal, and then according to multiple cavity walls
The field strength on 1024 surfaces, the absorbed power that microwave is absorbed to heating target judges, then according to the absorption work(of heating target
The incident power and microwave reflection of rate and incidence wave go out the relationship between the reflection power of cavity 102, the incidence to incidence wave
The reflection power that power and microwave reflection go out cavity 102 is judged.
Further, it is compared by the field strength to 104 position of each detector arrangement, realization judges cavity 102
Whether interior microwave field is uniform.
As shown in fig. 7, in one embodiment of the invention, detection method includes：Step S702 is added by being set to microwave
At least one detector arrangement 104 at least one detection hole in 10 cavity wall 1024 of thermal, which obtains, corresponds to cavity wall 1024 instead
The analog signal for the back wave penetrated, and analog signal is sent to AD conversion unit 108；Step S704 passes through adder 110
Each analog signal of part detector arrangement 104 at least one detector arrangement 104 is added up, and accumulation result is sent out
It send to proportioner 112；Step S706, proportioner 112 receive the analog signal after adding up, and the analog signal after adding up zooms to
Less than being sent to AD conversion unit 108 after pre-set threshold value；Step S708, AD conversion unit 108 convert analog signals into
Digital signal, and digital signal is sent to control unit 106；Step S710, control unit 106 receive digital signal, control
Unit 106 determines the corresponding multiple target number signals of multiple detector arrangements 104 in predeterminable area, and determines any two target
Matching degree between digital signal；Step S712, if the matching degree between any two target number signal is more than preset matching
It spends, then control unit 106 determines even microwave distribution in predeterminable area.
In this embodiment, step S702 passes through at least one detection in 10 cavity wall 1024 of microwave heating equipment
At least one detector arrangement 104 in hole obtains the analog signal for the back wave that cavity wall 1024 reflects, it will be understood that analog signal
Characteristic, reflect the characteristic of back wave, analog signal is sent to adder 110 by subsequent detector arrangement 104, step S704,
Adder 110 receives the analog signal of whole detector arrangements 104 in cavity wall 1024, is sent to after the analog signal of reception is added up
In proportioner 112；Step S706, proportioner 112 adds the analog signal of adder 110, and the analog signal of reception is scaled
To less than the analog signal after scaling is then sent to by pre-set threshold value so that analog signal is adapted to AD conversion unit 108
AD conversion unit 108；Step S708, AD conversion unit 108 convert analog signals into digital signal, and by digital signal
It is sent to control unit 106, AD conversion unit 108, which converts analog signals into digital signal, can reduce control unit 106
Calculation amount, and then improve to the microwave state of microwave heating equipment 10 constant speed degree really；Step S710, control unit 106 connect
After the digital signal for receiving AD conversion unit 108, the multiple detector arrangements 104 and multiple detections dress in predeterminable area are determined
The corresponding digital signal of analog signal for setting 104, obtains target number signal, it is later determined that any two target number signal it
Between matching degree, it will be understood that matching degree is higher, and the characteristic of target number signal is more similar, due to the spy of target number signal
Property is corresponding with the characteristic of back wave, therefore 104 position of corresponding two detector arrangements of two digital signals that matching degree is high
Back wave characteristic it is also more similar, thus the characteristic of two position back waves is closer；Step S712, if any two target
Matching degree between digital signal is more than preset matching degree, at this time 104 position of any two detector arrangement in predeterminable area
The characteristic of the back wave at place is closer to, close with the associated other microwaves of back wave also glue position, and control unit 106 determines at this time
Even microwave distribution in predeterminable area.
As shown in figure 8, in one embodiment of the invention, detection method includes：Step S802 is added by being set to microwave
At least one detector arrangement 104 at least one detection hole in 10 cavity wall 1024 of thermal, which obtains, corresponds to cavity wall 1024 instead
The analog signal for the back wave penetrated, and analog signal is sent to adder 110；Step S804, will at least by adder 110
Each analog signal of whole detector arrangements 104 in one detector arrangement 104 adds up, and accumulation result is sent to ratio
Example device 112；Step S806, proportioner 112 receive the analog signal after adding up, and the analog signal after adding up zooms to less than pre-
If being sent to AD conversion unit 108 after threshold values；Step S808, AD conversion unit 108 convert analog signals into digital letter
Number, and digital signal is sent to control unit 106；Step S810, control unit 106 receive digital signal and determine number letter
Matching degree number with preset number signal；Step S812, control unit 106 determine that the maximum preset number signal of matching degree corresponds to
Default microwave state, be microwave heating equipment 10 microwave state.
In this embodiment, step S802 passes through at least one detection in 10 cavity wall 1024 of microwave heating equipment
At least one detector arrangement 104 in hole obtains the analog signal for the back wave that cavity wall 1024 reflects, it will be understood that analog signal
Characteristic, reflect the characteristic of back wave, analog signal is sent to adder 110 by subsequent detector arrangement 104, step S804,
Adder 110 receives the analog signal of whole detector arrangements 104 in cavity wall 1024, is sent to after the analog signal of reception is added up
In proportioner 112；Step S806, proportioner 112 adds the analog signal of adder 110, and the analog signal of reception is scaled
To less than the analog signal after scaling is then sent to by pre-set threshold value so that analog signal is adapted to AD conversion unit 108
AD conversion unit 108；Step S808, AD conversion unit 108 convert analog signals into digital signal, and by digital signal
It is sent to control unit 106, AD conversion unit 108, which converts analog signals into digital signal, can reduce control unit 106
Calculation amount, and then improve to the microwave state of microwave heating equipment 10 constant speed degree really；Step S810, control unit 106 connect
After the digital signal for receiving AD conversion unit 108, the digital signal received multiple is prestored with what is prestored in control unit 106
Digital signal is matched, and determines the matching degree between digital signal and multiple digital signals that prestore, it will be understood that number letter
It is number higher with the matching degree for the digital signal that prestores, the corresponding microwave state of digital signal is corresponding with the digital signal that prestores prestore it is micro-
Wavy state is closer；Step S812 determines the corresponding default microwave state of the maximum preset number signal of matching degree, for microwave plus
The microwave state of thermal 10, to realize the determination to the microwave state of microwave heating equipment 10.
Technical scheme of the present invention is described in detail above in association with attached drawing, technical solution through the invention is micro- by being set to
At least one detector arrangement at least one detection hole in Wave heating device cavity wall obtains the mould of the back wave of cavity wall reflection
Intend signal, and judges the microwave state of microwave heating equipment according to the analog signal of back wave, convenient and efficient, operability is high,
Cost is relatively low.
In the present invention, term " first ", " second ", " third " are only used for the purpose of description, and should not be understood as indicating
Or imply relative importance；Term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " installation ",
The terms such as " connected ", " connection ", " fixation " shall be understood in a broad sense, for example, " connection " may be a fixed connection, can also be can
Dismantling connection, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.For this
For the those of ordinary skill in field, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In description of the invention, it is to be understood that the instructions such as term "upper", "lower", "left", "right", "front", "rear"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched
It states, specific direction must be had, with specific azimuth configuration and operation by not indicating or implying the indicated device or unit,
It is thus impossible to be interpreted as limitation of the present invention.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the present invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
It these are only the preferred embodiment of the present invention, be not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification made by all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of microwave heating equipment, which is characterized in that including：
Microwave generator, for generating incidence wave；
Cavity has multiple cavity walls；
At least one detection hole is arranged in the arbitrary cavity wall of the multiple cavity wall；
At least one detector arrangement, each detector arrangement is arranged in a detection hole, for detecting by the chamber
The back wave of wall reflection simultaneously generates the analog signal for corresponding to the back wave.
2. microwave heating equipment according to claim 1, which is characterized in that further include：
Control unit connect with all detector arrangements, receives each analog signal from each detector arrangement, uses
In the microwave state for determining the microwave heating equipment according to each analog signal.
3. microwave heating equipment according to claim 2, which is characterized in that further include：
At least one AD conversion unit is respectively connected to each detector arrangement, for being by the analog-signal transitions
Digital signal, and the digital signal is sent to described control unit.
4. microwave heating equipment according to claim 2, which is characterized in that further include：
At least one adder, each adder and all or part of detector arrangement at least one detector arrangement
Connection, the adder are used to add up from each analog signal of all or part of detector arrangement；
At least one proportioner, each proportioner connect at least one adder, and the proportioner is used for will be described
Analog signal after adder is cumulative zooms to less than pre-set threshold value, and the analog signal after scaling is sent to the control list
Member.
5. microwave heating equipment according to claim 1, which is characterized in that multiple described when the detection hole is multiple
Detection hole is uniformly distributed in the cavity wall.
6. microwave heating equipment according to any one of claim 1 to 5, which is characterized in that the detection hole is circle
Hole.
7. microwave heating equipment according to claim 6, which is characterized in that the diameter of the detection hole with it is described anti-
The frequency dependence of ejected wave.
8. a kind of detection method, for the microwave heating equipment described in any one of claim 1 to 7, which is characterized in that packet
It includes：
Pass through at least one detector arrangement acquisition pair at least one detection hole in the microwave heating equipment cavity wall
The analog signal for the back wave that cavity wall described in Ying Yu reflects, and the analog signal is sent to AD conversion unit；
The analog signal is converted to digital signal by the AD conversion unit, and the digital signal is sent to control list
Member；
Described control unit receives the digital signal and determines the microwave of the microwave heating equipment according to the digital signal
State.
9. detection method according to claim 8, which is characterized in that further include：
By adder by each simulation of all or part detector arrangement at least one detector arrangement
Signal adds up, and accumulation result is sent to proportioner；
The proportioner receives the analog signal after adding up, and the analog signal after adding up zooms to less than after pre-set threshold value
It is sent to described control unit.
10. detection method according to claim 8, which is characterized in that the described control unit receives the number letter
Number and according to the digital signal determine the microwave heating equipment microwave state, specifically include：
Described control unit determines the matching degree of the digital signal and preset number signal；
Described control unit determines the corresponding default microwave state of the maximum preset number signal of matching degree, is the microwave
The microwave state of heating device.
11. detection method according to claim 8, which is characterized in that further include：
Described control unit determines the corresponding multiple target number signals of the multiple detector arrangements in predeterminable area, and determines and appoint
Matching degree between two target number signals of meaning；
If the matching degree between any two target number signal is more than preset matching degree, described control unit determines preset areas
Even microwave distribution in domain.
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| CN201810096517.3A CN108347800B (en) | 2018-01-31 | 2018-01-31 | Microwave heating device and detection method |
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| CN201810096517.3A CN108347800B (en) | 2018-01-31 | 2018-01-31 | Microwave heating device and detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114302524A (en) * | 2021-12-14 | 2022-04-08 | 深圳麦格米特电气股份有限公司 | Microwave detection circuit and method, microwave detection device and microwave device |
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|---|---|---|---|---|
| CN1496665A (en) * | 2002-03-12 | 2004-05-12 | ���µ�����ҵ��ʽ���� | High frequency heating apparatus and control method thereof |
| CN101828427A (en) * | 2007-10-18 | 2010-09-08 | 松下电器产业株式会社 | Microwave heating device |
| CN102934518A (en) * | 2011-04-19 | 2013-02-13 | 松下电器产业株式会社 | High frequency heating apparatus |
| US20170359864A1 (en) * | 2016-06-13 | 2017-12-14 | The Markov Corporation | Electronic oven with reflective energy steering |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1496665A (en) * | 2002-03-12 | 2004-05-12 | ���µ�����ҵ��ʽ���� | High frequency heating apparatus and control method thereof |
| CN101828427A (en) * | 2007-10-18 | 2010-09-08 | 松下电器产业株式会社 | Microwave heating device |
| CN102934518A (en) * | 2011-04-19 | 2013-02-13 | 松下电器产业株式会社 | High frequency heating apparatus |
| US20170359864A1 (en) * | 2016-06-13 | 2017-12-14 | The Markov Corporation | Electronic oven with reflective energy steering |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114302524A (en) * | 2021-12-14 | 2022-04-08 | 深圳麦格米特电气股份有限公司 | Microwave detection circuit and method, microwave detection device and microwave device |
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