CN108633122A - Microwave heating control method, system, device and microwave heating equipment - Google Patents
Microwave heating control method, system, device and microwave heating equipment Download PDFInfo
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- CN108633122A CN108633122A CN201810394511.4A CN201810394511A CN108633122A CN 108633122 A CN108633122 A CN 108633122A CN 201810394511 A CN201810394511 A CN 201810394511A CN 108633122 A CN108633122 A CN 108633122A
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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
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
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Abstract
The present invention relates to a kind of microwave heating control method, system, device and microwave heating equipment, wherein method includes：During microwave source emits microwave to heating object, the temperature information in the multiple sites in heating object surface is obtained；The temperature distribution information on heating object surface is obtained according to the temperature information；Frequency, phase and the power for emitting the microwave source microwave according to the temperature distribution information are adjusted, until the Temperature Distribution difference on heating object surface is less than first threshold.Above-mentioned microwave heating control method, the power emission of corresponding microwave source can be controlled according to the Temperature Distribution on heating object surface, targetedly microwave Flied emission distribution is provided, local heating control is carried out to heating object, so that the uniformity of temperature profile on heating object surface, the uniformity for improving microwave heating, to promote microwave heating efficiency and effect.
Description
Technical field
The present invention relates to microwave heating technique field, more particularly to a kind of microwave heating control method, system, device and
Microwave heating equipment.
Background technology
Microwave heating is a kind of by emitting microwave to heating object so that polar molecule in heating object with it is micro-
Wave interaction, electromagnetic energy are thermal energy, the technology heated to object.Microwave current heating technique is widely answered
For in domestic environments, reasonably microwave heating control method can effectively to promote the efficiency of heating surface of microwave heating.
Traditional microwave heating method heats object according to parameters such as the heating temperature of setting, heating times, so
And the rate of heat addition of different substances during heating is different, traditional microwave heating means cannot add according to the reality of substance
Enthusiasm condition adjustment output microwave power, cause the waste of microwave energy and heating effect poor, microwave heating it is less efficient.
Invention content
Based on this, it is necessary in view of the above technical problems, provide a kind of efficient microwave heating control method, system, dress
It sets and microwave heating equipment.
A kind of microwave heating control method, includes the following steps：
During microwave source emits microwave to heating object, detection obtains the multiple positions in heating object surface
The temperature information of point；
The temperature distribution information on heating object surface is obtained according to the temperature information；
Frequency, phase and the power for emitting the microwave source microwave according to the temperature distribution information are adjusted, directly
Temperature Distribution difference to heating object surface is less than first threshold.
Above-mentioned microwave heating control method obtains quilt in real time during microwave source emits microwave to heating object
The temperature information for heating the multiple sites of body surface, generates the temperature distribution information on corresponding heating object surface, can basis
The Temperature Distribution on heating object surface controls the power emission of corresponding microwave source, provides targetedly microwave Flied emission distribution
Local heating control is carried out to heating object so that the uniformity of temperature profile on heating object surface improves microwave heating
Uniformity, to promote microwave heating efficiency and effect.
In one embodiment, the microwave source emits microwave by circulator to microwave cavity；The circulator will
The microwave of microwave source transmitting is sent to microwave cavity by the second port of circulator, and receives second port microwave cavity
Feedback mouth microwave reflection, the microwave reflection is fed into microwave cavity by the third port of circulator.
The technical solution of above-described embodiment emits microwave, ring by circulator by the way that microwave source is arranged to microwave cavity
The microwave reflection that the microwave cavity of the second port of reception can be presented mouth by shape device re-enters microwave resonance by third port
Chamber obtains heat energy in the way of reflection power again feed-in microwave cavity, improves capacity usage ratio.
In one embodiment, before the temperature information for obtaining the multiple sites in heating object surface, further include：
During microwave source emits microwave, detection obtains the feedback mouth parameter information of microwave cavity, determines when feedforward oral reflex microwave
Frequency, phase and power；According to the frequency, phase and power of the microwave reflection, control microwave source is by circulator to institute
The microwave for stating microwave cavity transmitting original frequency and power carries out microwave to the heating object of the microwave resonance intracavitary and adds
Heat.
The technical solution of above-described embodiment presents mouth in the starting stage of microwave heating by the microwave cavity of detection
The size of reflection frequency and power, adjustment microwave source emit the microwave of suitable original frequency and power, avoid original frequency work(
Energy dissipation caused by rate setting is unreasonable, improves the utilization rate of energy.
In one embodiment, before detection obtains the step of feedback mouth parameter information of microwave cavity, further include：It obtains
The heating parameters and target temperature of heating object, wherein the heating parameters include heating object water content parameter and/
Or heating location information；According to the heating parameters and target temperature, control microwave source is sent out by circulator to microwave cavity
Penetrate the microwave with original frequency, phase and power.
The technical solution of above-described embodiment according to the water content parameter of the heating object of user setting and/or can add
Hot spot information and target temperature control the Microwave emission of microwave source, realize that micro-wave oven is applied and heated to the orientation of power
Speed control promotes the efficiency and effect of microwave heating.
In one embodiment, the frequency, phase and the power that export microwave are adjusted according to the temperature distribution information
It is whole, until after the step of Temperature Distribution difference on heating object surface is less than first threshold, further include：According to the temperature
Information, the mean temperature for obtaining heating object surface control the microwave source when the mean temperature reaches target temperature
Stop transmitting microwave.
The technical solution of above-described embodiment, controller calculate the mean temperature for obtaining heating object surface in real time, flat
It when equal temperature reaches target temperature, then controls microwave source and stops heating, be automatically stopped when reaching the heating temperature of user's needs
Heating improves the intelligent and easy to use property of microwave heating, it can be achieved that accurately microwave heating temperature control.
Further, in one embodiment, after controlling the step of microwave source stops transmitting microwave, further include：
Detection obtains the load condition of microwave cavity；When detect the microwave cavity load condition be mounted with heating object
When body, the temperature information in the multiple sites in heating object surface is monitored, and according to the temperature information, obtain heating object body surface
The mean temperature in face；When the difference of target temperature and the mean temperature reaches second threshold, the microwave source is controlled again
Emit microwave.
The technical solution of above-described embodiment reaches target temperature in heating object mean temperature and stops to heating object
After body is heated, if monitoring the state for being mounted with heating object, i.e., when object is not removed, then continues monitoring and obtain
The mean temperature on heating object surface is reduced to a certain degree in mean temperature, i.e. target temperature and the mean temperature
It when difference reaches second threshold, then controls microwave source and re-emits microwave heating object is reheated, it is ensured that heated
Object is stablized in target temperature, realizes to the intelligent heat preserving of heating object, avoids not taken out in time due to heating object
And it cools down.
In one embodiment, further include step after controlling the step of microwave source stops transmitting microwave：In microwave
During source emits microwave, detection obtains the load condition of microwave cavity；When the load for detecting the microwave cavity
When state is unloaded, controls the microwave source and close, and be switched to standby mode.
The technical solution of above-described embodiment can monitor system zero load after completing to the heating of heating object
When, i.e., when heating object is removed, microwave source is automatically closed, and be switched to standby mode, avoids user from taking out object and complete
Do not close energy waste and security risk caused by device after heating in time.
A kind of microwave heating control system, including：
Temperature information acquisition module, for during microwave source emits microwave to heating object, detection to obtain quilt
Heat the temperature information in the multiple sites of body surface；
Temperature Distribution acquisition module, the Temperature Distribution for obtaining heating object surface according to the temperature information are believed
Breath；
Microwave output control module, for power source is currently exported according to the temperature distribution information microwave frequency,
Phase and power are adjusted, until the Temperature Distribution difference on heating object surface is less than first threshold.
Above-mentioned microwave heating control system obtains quilt in real time during microwave source emits microwave to heating object
The temperature information for heating the multiple sites of body surface, generates the temperature distribution information on corresponding heating object surface, can basis
The Temperature Distribution on heating object surface controls the power emission of corresponding microwave source, provides targetedly microwave Flied emission distribution
Local heating control is carried out to heating object so that the uniformity of temperature profile on heating object surface improves microwave heating
Uniformity, to promote microwave heating efficiency and effect.
A kind of computer equipment, including memory, processor and storage can be run on a memory and on a processor
Computer program, the processor realize following steps when executing the computer program：
During microwave source emits microwave to heating object, detection obtains the multiple positions in heating object surface
The temperature information of point；
The temperature distribution information on heating object surface is obtained according to the temperature information；
Frequency, phase and the power for emitting the microwave source microwave according to the temperature distribution information are adjusted, directly
Temperature Distribution difference to heating object surface is less than first threshold.
Above computer equipment is realized in microwave source by the computer program run on the processor to being added
During hot object emits microwave, it is multiple that processor by more infrared temperature sensors obtains heating object surface in real time
The temperature information in site generates the temperature distribution information on corresponding heating object surface, according to the temperature on heating object surface
The power emission for spending the corresponding microwave source of distributed controll provides targetedly microwave Flied emission distribution to heating object carry out office
Portion's computer heating control so that the uniformity of temperature profile on heating object surface improves the uniformity of microwave heating, to promote microwave
The efficiency of heating surface and effect.
A kind of computer readable storage medium, is stored thereon with computer program, and the computer program is held by processor
Following steps are realized when row：
During microwave source emits microwave to heating object, detection obtains the multiple positions in heating object surface
The temperature information of point；
The temperature distribution information on heating object surface is obtained according to the temperature information；
Frequency, phase and the power for emitting the microwave source microwave according to the temperature distribution information are adjusted, directly
Temperature Distribution difference to heating object surface is less than first threshold.
Above computer storage medium is realized in microwave source by the computer program of its storage to heating object
During emitting microwave, processor obtains the multiple sites in heating object surface in real time by more infrared temperature sensors
Temperature information generates the temperature distribution information on corresponding heating object surface, according to the Temperature Distribution on heating object surface
The power emission for controlling corresponding microwave source provides targetedly microwave Flied emission distribution and carries out local heating to heating object
Control so that the uniformity of temperature profile on heating object surface improves the uniformity of microwave heating, to promote microwave heating effect
Rate and effect.
In addition, the present invention also provides a kind of microwave heating control devices, including：Microwave source, temperature sensor and processor；
Microwave source one end connection processing device, the other end connect microwave cavity, and the more infrared temperature sensors are set to institute
It states within microwave cavity and is connected to the processor.
The processor is used to execute the microwave heating control method of any one embodiment as above.
Above-mentioned microwave heating control device, the detectable temperature for obtaining microwave resonance intracavitary heating object of temperature sensor
Information is simultaneously sent to the processor, and during microwave source emits microwave to heating object, processor is passed by temperature
Sensor obtains the temperature information in the multiple sites in heating object surface in real time, generates the temperature point on corresponding heating object surface
Cloth information controls the power emission of corresponding microwave source according to the Temperature Distribution on heating object surface, provides targetedly micro-
Wavefield emission distribution carries out local heating control to heating object so that the uniformity of temperature profile on heating object surface carries
The uniformity of high microwave heating, to promote microwave heating efficiency and effect.
In one embodiment, the temperature sensor is more infrared temperature sensors, and the more infrared temperatures pass
The setting regions that each detection eye of sensor places the space of heating object towards microwave cavity is uniformly distributed, for detecting
The temperature information of microwave resonance intracavitary heating object is simultaneously sent to the processor.
The technical solution of above-described embodiment, processor can be detected by each detection eye of more infrared temperature sensors
Obtain the temperature information in the equally distributed multiple sites of setting regions in the space of microwave resonance intracavitary placement heating object, root
The distributed intelligence of heating object space surface temperature is obtained according to the temperature information in multiple site.
In one embodiment, the microwave heating control device of the embodiment of the present invention further includes circulator, the circulator
It is connected between the microwave source and the microwave cavity, the output end of the first port connection microwave source of the circulator,
The second port and third port of the circulator are separately connected microwave cavity；The microwave of transmitting is passed through by the microwave source
Single port is transmitted to circulator, and microwave is sent to microwave cavity by the circulator by second port, and receives second end
The microwave reflection of mouth microwave cavity feedback mouth, microwave cavity is fed by the microwave reflection by the third port.
The technical solution of above-described embodiment, microwave source emit microwave by circulator to microwave cavity, and circulator can incite somebody to action
The microwave reflection of the microwave cavity feedback mouth of the second port of reception re-enters microwave cavity by third port, using anti-
The mode for penetrating power feed-in microwave cavity again obtains heat energy, improves capacity usage ratio.
In one embodiment, the microwave launcher includes multigroup microwave source and circulator, microwave source described in every group
One end connection processing device, the other end connect the first port of circulator, the second port and third port of circulator described in every group
It is separately connected microwave cavity；Wherein, every group of microwave source and circulator are uniformly distributed in around the cavity of microwave cavity.
The technical solution of above-described embodiment, microwave launcher setting are uniformly distributed in around the cavity of microwave cavity
Multigroup microwave source and circulator, processor can realize output by the control of transmission power and frequency to each microwave source
In precisely meticulously regulating and controlling for heating object area of space magnetic distribution.
The present invention also provides a kind of microwave heating equipments, including the as above microwave heating control dress of any one embodiment
It sets and microwave cavity.
Above-mentioned microwave heating equipment, the detectable temperature information for obtaining microwave resonance intracavitary heating object of temperature sensor
And it is sent to the processor, during microwave source emits microwave to heating object, processor passes through temperature sensor
The temperature information for obtaining the multiple sites in heating object surface in real time generates the Temperature Distribution letter on corresponding heating object surface
Breath, the power emission of corresponding microwave source is controlled according to the Temperature Distribution on heating object surface, provides targetedly microwave field
Transmitting distribution carries out local heating control to heating object so that the uniformity of temperature profile on heating object surface improves micro-
The uniformity of Wave heating, to promote microwave heating efficiency and effect.
Description of the drawings
Fig. 1 is the microwave heating equipment structural schematic diagram of one embodiment；
Fig. 2 is the flow diagram of the microwave heating control method of one embodiment；
Fig. 3 is the flow diagram of the microwave heating control method of another embodiment；
Fig. 4 is the flow diagram of the microwave heating control method of another embodiment；
Fig. 5 is the structure diagram of the microwave heating control system of one embodiment；
Fig. 6 is the microwave heating equipment structural schematic diagram of one embodiment.
Fig. 7 be one embodiment microwave heating equipment in circulator attachment structure schematic diagram.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the present invention, not
For limiting the present invention.
Microwave heating control method provided by the invention can be applied in microwave heating equipment as shown in Figure 1.Its
In, which includes microwave source 110, temperature sensor 120, processor 130 and microwave cavity 140；Microwave source
110 one end connection processing devices 130, the other end connect microwave cavity 140, and temperature sensor 120 is set to microwave cavity 140
Within and connect with processor 130, temperature sensor 120 has the function of detecting the temperature in multiple sites, for detecting microwave
The temperature information in the 150 multiple sites of place area of space of heating object and it is sent to the processor 130 in resonant cavity 140,
It can be realized by multiple temperature sensors, or pass through the temperature sensing of single detectable multiple site temperature information
Device realizes that processor 130 is used to adjust the Microwave emission of control microwave source 110.
In one embodiment, shown in Figure 2, a kind of microwave heating control method is provided, is applied in this way
It illustrates, includes the following steps for processor in Fig. 1：
S210, during microwave source emits microwave to heating object, detection obtains the heating object surface
The temperature information in multiple sites.
Wherein, the microwave source may include one or more, and microwave source can emit microwave under the control of a processor
Heating object is heated.The site is multiple location points of heating object surface distribution；It is with temperature sensor
For more infrared temperature sensors, then each site can correspond to the red of a detection eye transmitting of more infrared temperature sensors
Outside line is irradiated to the position on the heating object surface.
In this step, during microwave source emits microwave to heating object, processor can be by mostly furious outer
Temperature sensor obtains multiple temperature informations of the multiple site detections in heating object surface.
S220 obtains the temperature distribution information on heating object surface according to the temperature information.
Wherein, the temperature distribution information is heating object surface region two dimension or three-dimensional temperature distribution information；
In this step, the temperature in multiple sites on the heating object surface that processor is obtained according to abovementioned steps detection
Information obtains the temperature distribution information on the heating object surface by calculating.
S230, frequency, phase and the power that microwave is emitted the microwave source according to the temperature distribution information are adjusted
It is whole, until the Temperature Distribution difference on heating object surface is less than first threshold.
Wherein, the Temperature Distribution difference is to reflect the numerical value of heating object surface temperature distribution difference, can be
Refer to the absolute value of the difference between the maxima and minima of heating object surface temperature.First threshold can be for limiting
Heating object surface temperature distribution difference maximum value and pre-set temperature threshold, microwave source can there are one or it is more
It is a.
In this step, processor can emit microwave source according to the temperature distribution information of calculating frequency, the phase of microwave
Position and power are adjusted, until the Temperature Distribution difference on heating object surface is less than preset first threshold.
Such as multiple microwave sources, processor can according to the temperature distribution information on the heating object surface of calculating,
Controlling each branch respectively can for the microwave source near areas of higher temperature in the Microwave emission of the microwave source of different location
The power and frequency that control is decreased or turned off its transmitting microwave can then control the microwave source near temperature lower region
The power and frequency for increasing transmitting microwave adjust the microwave field distribution situation of multiple microwave source transmittings according to Temperature Distribution, to
It realizes and adjustment is controlled to the temperature of heating object.
Above-mentioned microwave heating control method obtains quilt in real time during microwave source emits microwave to heating object
The temperature information for heating the multiple sites of body surface, generates the temperature distribution information on corresponding heating object surface, can basis
The Temperature Distribution on heating object surface controls the power emission of corresponding microwave source, provides targetedly microwave Flied emission distribution
Local heating control is carried out to heating object so that the uniformity of temperature profile on heating object surface improves microwave heating
Uniformity, to promote microwave heating efficiency and effect.
In one embodiment, the microwave source emits microwave by circulator to microwave cavity；The circulator will
The microwave of microwave source transmitting is sent to microwave cavity by the second port of circulator, and receives second port microwave cavity
Feedback mouth microwave reflection, the microwave reflection is fed into microwave cavity by the third port of circulator.
The technical solution of above-described embodiment emits microwave, ring by circulator by the way that microwave source is arranged to microwave cavity
The microwave reflection that the microwave cavity received by second port can be presented mouth by shape device re-enters microwave resonance by third port
Chamber obtains heat energy in the way of reflection power again feed-in microwave cavity, improves capacity usage ratio.
Microwave output power is being adjusted with before controlling heating object surface temperature distribution, it can also be to microwave
The original frequency of output is adjusted, in one embodiment, shown in Figure 3, and heating object is obtained described in step S210
Before the temperature information in the multiple sites in body surface face, further include：S203, during microwave source emits microwave, detection obtains micro-
The feedback mouth parameter information of wave resonance chamber determines frequency, phase and power when feedforward oral reflex microwave；S204, according to described anti-
The frequency, phase and power of microwave are penetrated, control microwave source emits original frequency and work(by circulator to the microwave cavity
The microwave of rate carries out microwave heating to the heating object of the microwave resonance intracavitary.
The technical solution of above-described embodiment presents mouth in the starting stage of microwave heating by the microwave cavity of detection
The microwave of corresponding original frequency and power is arranged in reflection frequency, and according to the size of feedback oral reflex power, suitable frequency is arranged
With the microwave of power, energy dissipation caused by avoiding original frequency power setting unreasonable improves the utilization rate of energy.
Further, in one embodiment, shown in Figure 3 in order to which the original frequency of microwave source is rationally arranged,
Before the step of detection of S203 obtains the feedback mouth parameter information of microwave cavity, further include：S201 obtains heating object
Heating parameters and target temperature, wherein the heating parameters include the water content parameter and/or heating position letter of heating object
Breath；S202, according to the heating parameters and target temperature, control microwave source has just by circulator to microwave cavity transmitting
The microwave of beginning frequency, phase and power.
Wherein, target temperature can be the target heating temperature that user inputs setting, and water content parameter can be that user sets
Setting or by detection acquisition, water content parameter can divide high-moisture, middle water content, low water content, the control to microwave source
It makes other than the microwave with original frequency, phase and power of control microwave cavity transmitting, can also be and be set as single source
The heating mode etc. that the heating mode or multi-source group opened are run jointly.
The technical solution of above-described embodiment according to the water content parameter of the heating object of user setting and/or can add
The information such as hot spot and target temperature control the Microwave emission of microwave source, realize that micro-wave oven is applied and added to the orientation of power
Thermal velocity controls, and promotes the efficiency and effect of microwave heating.
In one embodiment, shown in Figure 3, in S230 according to the temperature distribution information to the frequency of output microwave
Rate, phase and power are adjusted, until after the step of Temperature Distribution difference on heating object surface is less than first threshold,
Further include：S241 obtains the mean temperature on heating object surface, when the mean temperature reaches according to the temperature information
When target temperature, controls the microwave source and stop transmitting microwave.
The technical solution of above-described embodiment, controller calculate the mean temperature for obtaining heating object surface in real time, flat
It when equal temperature reaches target temperature, then controls microwave source and stops heating, be automatically stopped when reaching the heating temperature of user's needs
Heating improves the intelligent and easy to use property of microwave heating, it can be achieved that accurately microwave heating temperature control.
Further, in one embodiment, shown in Figure 3, it is micro- to stop transmitting in the control of the S241 microwave source
After the step of wave, further include：S242, detection obtain the load condition of microwave cavity；S243, when detecting that the microwave is humorous
The load condition of chamber of shaking is to monitor the temperature information in the multiple sites in heating object surface, and root when being mounted with heating object
According to the temperature information, the mean temperature on heating object surface is obtained；S244, when the difference of target temperature and the mean temperature
When value reaches second threshold, controls the microwave source and re-emit microwave.
Wherein, the load condition of the microwave cavity can be obtained by reflection power or standing wave detection, reflect work(
Rate or standing wave are more than setting thresholding, such as standing wave is more than 10, then is light condition；Otherwise it is the shape for being mounted with heating object
State；The difference of the target temperature and the mean temperature is the difference that target temperature subtracts that the mean temperature calculates.
The technical solution of above-described embodiment reaches target temperature in heating object mean temperature and stops to heating object
After body is heated, if monitoring the state for being mounted with heating object, i.e., when object is not removed, then continues monitoring and obtain
The mean temperature on heating object surface is reduced to a certain degree in mean temperature, i.e. target temperature and the mean temperature
It when difference reaches second threshold, then controls microwave source and re-emits microwave heating object is reheated, it is ensured that heated
Object is stablized in target temperature, realizes to the intelligent heat preserving of heating object, avoids not taken out in time due to heating object
And it cools down.
In one embodiment, shown in Figure 3, in the step of detection of S242 obtains the load condition of microwave cavity
Later, further include step：S245 controls the microwave source when it is unloaded to detect the load condition of the microwave cavity
It closes, and is switched to standby mode.
The technical solution of above-described embodiment can monitor system zero load after completing to the heating of heating object
When, i.e., when heating object is removed, microwave source is automatically closed, and be switched to standby mode, avoids user from taking out object and complete
Do not close energy waste and security risk caused by device after heating in time.
In one embodiment, in conjunction with the technical solution of above-mentioned each embodiment, shown in Figure 4, the embodiment of the present invention
Microwave heating control method may include steps of：
S401 obtains the heating target temperature and heating load type of setting in device power-up initializing, and selection corresponds to
Dan Yuankai or the heating mode run jointly of multi-source group open microwave source；
S402 reads the initial information of heating target temperature and heating load type, and according to the initial information control of reading
The microwave of power source output look-in frequency and power processed；
S403 reads the feedback mouth parameter of microwave cavity, and emits the first of microwave according to each microwave source of the parameter setting
Beginning frequency, phase and power, device enter heated condition；
S404 reads the temperature information of more infrared temperature sensors detection, and adjusts microwave source according to the temperature information
Output power, phase and frequency, make heating object surface Temperature Distribution difference be less than first threshold；
S405 obtains the mean temperature on heating object surface according to temperature information, when the mean temperature reaches target temperature
When spending, control microwave source stops transmitting microwave energy；
S406, if detecting, heating object is not removed, reads the temperature information of more infrared temperature sensors detection simultaneously
The mean temperature for obtaining heating object surface, when mean temperature reaches second threshold less than the difference of target temperature, control
Microwave source re-emits microwave energy, returns to above-mentioned steps S403；
S407, if detecting, the load condition of present apparatus is zero load, and control device is closed, is in standby.
The microwave heating control method of above-described embodiment can provide targetedly field according to the temperature on heating object surface
Distribution carries out local microwave heating control and is detected by temperature detection and load condition to improve microwave heating uniformity, can
To be automatically stopped heating when heating object mean temperature reaches target temperature, reheated when heating object cools down pair
Object is kept the temperature, and closing device is automatically controlled when object is removed, and is effectively saved energy waste, is improved device
Property and microwave heating efficiency easy to use.
It should be understood that although each step in the flow chart of Fig. 2-4 is shown successively according to the instruction of arrow,
These steps are not that the inevitable sequence indicated according to arrow executes successively.Unless expressly stating otherwise herein, these steps
Execution there is no stringent sequences to limit, these steps can execute in other order.Moreover, at least one in Fig. 2-4
Part steps may include that either these sub-steps of multiple stages or stage are not necessarily in synchronization to multiple sub-steps
Completion is executed, but can be executed at different times, the execution sequence in these sub-steps or stage is also not necessarily successively
It carries out, but can either the sub-step of other steps or at least part in stage be in turn or alternately with other steps
It executes.
In one embodiment, as shown in figure 5, providing a kind of microwave heating control system, including：Temperature information obtains
Module 510, Temperature Distribution acquisition module 520 and microwave output control module 530, wherein：
Temperature information acquisition module 510, for during microwave source emits microwave to heating object, detection to obtain
The temperature information in the multiple sites in heating object surface；
Temperature Distribution acquisition module 520, the Temperature Distribution for obtaining heating object surface according to the temperature information
Information；
Microwave output control module 530, the frequency for currently exporting microwave to power source according to the temperature distribution information
Rate, phase and power are adjusted, until the Temperature Distribution difference on heating object surface is less than first threshold.
Above-mentioned microwave heating control system obtains quilt in real time during microwave source emits microwave to heating object
The temperature information for heating the multiple sites of body surface, generates the temperature distribution information on corresponding heating object surface, can basis
The Temperature Distribution on heating object surface controls the power emission of corresponding microwave source, provides targetedly microwave Flied emission distribution
Local heating control is carried out to heating object so that the uniformity of temperature profile on heating object surface improves microwave heating
Uniformity, to promote microwave heating efficiency and effect.
In one embodiment, the microwave heating control system of the embodiment of the present invention further includes：First Microwave emission mould
Block emits microwave by circulator for controlling the microwave source to microwave cavity；Wherein, the circulator sends out microwave source
The microwave penetrated is sent to microwave cavity by the second port of circulator, and receives the anti-of second port microwave cavity feedback mouth
Microwave is penetrated, the microwave reflection is fed into microwave cavity by the third port of circulator.
In one embodiment, the microwave heating control system of the embodiment of the present invention further includes：
Mouth detection module is presented, for during microwave source emits microwave, detection to obtain the feedback mouth ginseng of microwave cavity
Number information determines frequency, phase and power when feedforward oral reflex microwave；
Second Microwave emission module, for the frequency, phase and power according to the microwave reflection, control microwave source passes through
Circulator emits the microwave of original frequency and power to the microwave cavity, to the heating object of the microwave resonance intracavitary
Carry out microwave heating.
In one embodiment, the microwave heating control system of the embodiment of the present invention further includes：
Initial parameter acquisition module, the heating parameters for obtaining heating object and target temperature, wherein the heating
Parameter includes the water content parameter or heating location information of heating object；
Third Microwave emission module, for according to the heating parameters and target temperature, control microwave source to pass through circulator
To microwave of the microwave cavity transmitting with original frequency, phase and power.
In one embodiment, the microwave heating control system of the embodiment of the present invention further includes：
Target temperature control module, for according to the temperature information, obtaining the mean temperature on heating object surface, when
When the mean temperature reaches target temperature, controls the microwave source and stop transmitting microwave.
Further, in one embodiment, the microwave heating control system of the embodiment of the present invention further includes：
First load detecting module, for detecting the load condition for obtaining microwave cavity；
Mean temperature acquisition module, for being mounted with heating object when the load condition for detecting the microwave cavity
When body, the temperature information in the multiple sites in heating object surface is monitored, and according to the temperature information, obtain heating object body surface
The mean temperature in face；
Microwave emission control module again, for when the difference of target temperature and the mean temperature reaches second threshold,
It controls the microwave source and re-emits microwave.
In one embodiment, the microwave heating control system of the embodiment of the present invention further includes：
Second load detecting module, for during microwave source emits microwave, detection to obtain the negative of microwave cavity
Load state；
Device closedown module, for when it is unloaded to detect the load condition of the microwave cavity, control to be described micro-
Wave source is closed, and is switched to standby mode.
Specific about microwave heating control system limits the limit that may refer to above for microwave heating control method
Fixed, details are not described herein.Modules in above-mentioned microwave heating control system can fully or partially through software, hardware and its
It combines to realize.Above-mentioned each module can be embedded in or in the form of hardware independently of in the processor in computer equipment, can also
It is stored in a software form in the memory in computer equipment, in order to which processor calls the above modules of execution corresponding
Operation.
The microwave heating control system of the present invention and the microwave heating control method of the present invention correspond, in above-mentioned microwave
The technical characteristic and advantage that the embodiment of method for heating and controlling illustrates are suitable for the implementation of microwave heating control system
In example, hereby give notice that.
In one embodiment, a kind of computer equipment is provided, including memory, processor and storage are on a memory
And the computer program that can be run on a processor, processor realize following steps when executing computer program：
During microwave source emits microwave to heating object, detection obtains the multiple positions in heating object surface
The temperature information of point；
The temperature distribution information on heating object surface is obtained according to the temperature information；
Frequency, phase and the power for emitting the microwave source microwave according to the temperature distribution information are adjusted, directly
Temperature Distribution difference to heating object surface is less than first threshold.
In one embodiment, following steps are also realized when processor executes computer program：
Microwave source emits microwave by circulator to microwave cavity；Wherein, the circulator emits microwave source micro-
Wave is sent to microwave cavity by the second port of circulator, and the reflection for receiving second port microwave cavity feedback mouth is micro-
The microwave reflection is fed into microwave cavity by wave by the third port of circulator.
In one embodiment, following steps are also realized when processor executes computer program：
During microwave source emits microwave, detection obtains the feedback mouth parameter information of microwave cavity, determines when feedforward
Frequency, phase and the power of oral reflex microwave；According to the frequency, phase and power of the microwave reflection, control microwave source passes through
Circulator emits the microwave of original frequency and power to the microwave cavity, to the heating object of the microwave resonance intracavitary
Carry out microwave heating.
In one embodiment, following steps are also realized when processor executes computer program：
Obtain the heating parameters and target temperature of heating object, wherein the heating parameters include heating object
Water content parameter and/or heating location information；According to the heating parameters and target temperature, control microwave source by circulator to
Microwave of the microwave cavity transmitting with original frequency, phase and power.
In one embodiment, following steps are also realized when processor executes computer program：
According to the temperature information, the mean temperature on heating object surface is obtained, when the mean temperature reaches target
When temperature, controls the microwave source and stop transmitting microwave.
In one embodiment, following steps are also realized when processor executes computer program：
Detection obtains the load condition of microwave cavity；When detect the microwave cavity load condition be mounted with
When heating object, the temperature information in the multiple sites in heating object surface is monitored, and according to the temperature information, acquisition is added
The mean temperature on hot object surface；When the difference of target temperature and the mean temperature reaches second threshold, control is described micro-
Wave source re-emits microwave.
In one embodiment, following steps are also realized when processor executes computer program：
During microwave source emits microwave, detection obtains the load condition of microwave cavity；It is described micro- when detecting
When the load condition of wave resonance chamber is unloaded, controls the microwave source and close, and be switched to standby mode.
In one embodiment, a kind of computer readable storage medium is provided, computer program is stored thereon with, is calculated
Machine program realizes following steps when being executed by processor：
During microwave source emits microwave to heating object, detection obtains the multiple positions in heating object surface
The temperature information of point；
The temperature distribution information on heating object surface is obtained according to the temperature information；
Frequency, phase and the power for emitting the microwave source microwave according to the temperature distribution information are adjusted, directly
Temperature Distribution difference to heating object surface is less than first threshold.
In one embodiment, following steps are also realized when computer program is executed by processor：
Microwave source emits microwave by circulator to microwave cavity；Wherein, the circulator emits microwave source micro-
Wave is sent to microwave cavity by the second port of circulator, and the reflection for receiving second port microwave cavity feedback mouth is micro-
The microwave reflection is fed into microwave cavity by wave by the third port of circulator.
In one embodiment, following steps are also realized when computer program is executed by processor：
During microwave source emits microwave, detection obtains the feedback mouth parameter information of microwave cavity, determines when feedforward
Frequency, phase and the power of oral reflex microwave；According to the frequency, phase and power of the microwave reflection, control microwave source passes through
Circulator emits the microwave of original frequency and power to the microwave cavity, to the heating object of the microwave resonance intracavitary
Carry out microwave heating.
In one embodiment, following steps are also realized when computer program is executed by processor：
Obtain the heating parameters and target temperature of heating object, wherein the heating parameters include heating object
Water content parameter and/or heating location information；According to the heating parameters and target temperature, control microwave source by circulator to
Microwave of the microwave cavity transmitting with original frequency, phase and power.
In one embodiment, following steps are also realized when computer program is executed by processor：
According to the temperature information, the mean temperature on heating object surface is obtained, when the mean temperature reaches target
When temperature, controls the microwave source and stop transmitting microwave.
In one embodiment, following steps are also realized when computer program is executed by processor：
Detection obtains the load condition of microwave cavity；When detect the microwave cavity load condition be mounted with
When heating object, the temperature information in the multiple sites in heating object surface is monitored, and according to the temperature information, acquisition is added
The mean temperature on hot object surface；When the difference of target temperature and the mean temperature reaches second threshold, control is described micro-
Wave source re-emits microwave.
In one embodiment, following steps are also realized when computer program is executed by processor：
During microwave source emits microwave, detection obtains the load condition of microwave cavity；It is described micro- when detecting
When the load condition of wave resonance chamber is unloaded, controls the microwave source and close, and be switched to standby mode.
One of ordinary skill in the art will appreciate that realizing all or part of flow in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the computer program can be stored in a non-volatile computer
In read/write memory medium, the computer program is when being executed, it may include such as the flow of the embodiment of above-mentioned each method.Wherein,
Any reference to memory, storage, database or other media used in each embodiment provided by the present invention,
Including non-volatile and/or volatile memory.Nonvolatile memory may include read-only memory (ROM), programming ROM
(PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include
Random access memory (RAM) or external cache.By way of illustration and not limitation, RAM is available in many forms,
Such as static state RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDRSDRAM), enhancing
Type SDRAM (ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM
(RDRAM), direct memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM) etc..
In addition, the present invention also provides a kind of microwave heating control device, it is shown in Figure 6, including：Microwave source 610, temperature
Sensor 620 and processor 630；610 one end connection processing device 630 of the microwave source, the other end connect microwave cavity 640,
The temperature sensor 620 is set within the microwave cavity 640 and is connect with the processor 630.
The processor 630 is used to execute the microwave heating control method of any one embodiment as above.
Above-mentioned microwave heating control device, heating object in 620 detectable acquisition microwave cavity 640 of temperature sensor
Temperature information and be sent to the processor 630, microwave source 610 to heating object emit microwave during, processing
Device 630 obtains the temperature information in the multiple sites in heating object surface by temperature sensor 620 in real time, generates corresponding added
The temperature distribution information on hot object surface controls the work(of corresponding microwave source 610 according to the Temperature Distribution on heating object surface
Rate emits, and provides targetedly microwave Flied emission distribution and carries out local heating control to heating object so that heating object
The uniformity of temperature profile on surface improves the uniformity of microwave heating, to promote microwave heating efficiency and effect.
Wherein, temperature sensor 620 can be the sensor of the temperature detect with multiple sites, for detecting
The temperature information in the multiple sites of area of space where heating object and it is sent to processor 630 in microwave cavity 640, it can
To be the temperature sensor reality realized by multiple temperature sensors, or pass through single detectable multiple site temperature information
It is existing.
In one embodiment, the temperature sensor 620 is more infrared temperature sensors, the more infrared temperatures
The setting regions that each detection eye of sensor places the space of heating object towards microwave cavity 640 is uniformly distributed, and is used
In the temperature information of heating object in detection microwave cavity 640 and it is sent to the processor 630.
The technical solution of above-described embodiment, processor 630 can pass through each detection of more infrared temperature sensors 620
Eye detection obtains the temperature in the equally distributed multiple sites of setting regions in the space that heating object is placed in microwave cavity 640
Information is spent, the distributed intelligence of heating object space surface temperature is obtained according to the temperature information in multiple site.
In one embodiment, referring to shown in Fig. 6 and Fig. 7, the microwave heating control device of the embodiment of the present invention further includes
Circulator 650, the circulator 650 are connected between the microwave source 610 and the microwave cavity 640, the circulator
650 first port 651 connects the output end of microwave source 610, the second port 652 and third port 653 of the circulator 650
It is separately connected microwave cavity 640；The microwave of transmitting is transmitted to circulator by the microwave source 610 by first port 651
650, microwave is sent to microwave cavity 640 by the circulator 650 by second port 652, and is received second port 652 and returned
The microwave cavity 640 returned presents the microwave reflection of mouth, and it is humorous that the microwave reflection by the third port 653 is fed into microwave
Shake chamber 640.
Wherein, the first port 651 be circulator 650 input terminal, second port 652 be circulator 650 output/
Input terminal, third port 653 are the output end of circulator 650, and the circulator 650 is set as the microwave inside circulator 650
Energy is according to first port 651 to second port 652, second port 652 to third port 653, third port 653 to first end
651 one-way transmissions of mouth.
The technical solution of above-described embodiment, microwave source 610 emit microwave, ring by circulator 650 to microwave cavity 640
The microwave reflection that the second port 652 of reception returns can be re-entered microwave cavity by shape device 650 by third port 653
640, heat energy is obtained in the way of reflection power again feed-in microwave cavity 640, improves capacity usage ratio.
In one embodiment, the microwave launcher includes multigroup microwave source 610 and circulator 650, referring in Fig. 6
First group to N (N be positive integer) more than or equal to two group microwave sources 610 and circulator 650, microwave source described in every group
610 one end connection processing devices 630, the other end connect the first port 651 of circulator 650, the second of circulator 650 described in every group
Port 652 and third port 653 are separately connected microwave cavity 640；Wherein, every group of microwave source 610 and circulator 650 uniformly divide
It is distributed in around the cavity of microwave cavity 640.
The technical solution of above-described embodiment, microwave launcher setting are uniformly distributed in the cavity week of microwave cavity 640
The multigroup microwave source 610 and circulator 650 enclosed, processor 630 can pass through the transmission power and frequency to each microwave source 610
Control, realize be output in heating object area of space magnetic distribution precisely meticulously regulate and control.
The present invention also provides a kind of microwave heating equipments, including the as above microwave heating control dress of any one embodiment
It sets and microwave cavity 640.
Above-mentioned microwave heating equipment, the detectable temperature for obtaining microwave resonance intracavitary heating object of temperature sensor 620
Information is simultaneously sent to the processor 630, and during microwave source 610 emits microwave to heating object, processor 630 is logical
Excess temperature sensor 620 obtains the temperature information in the multiple sites in heating object surface in real time, generates corresponding heating object
The temperature distribution information on surface controls the power emission of corresponding microwave source 610 according to the Temperature Distribution on heating object surface,
Targetedly microwave Flied emission distribution is provided, local heating control is carried out to heating object so that the temperature on heating object surface
Degree is evenly distributed, and improves the uniformity of microwave heating, to promote microwave heating efficiency and effect.
Each technical characteristic of above example can be combined arbitrarily, to keep description succinct, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (15)
1. a kind of microwave heating control method, which is characterized in that including：
During microwave source emits microwave to heating object, detection obtains the multiple sites in heating object surface
Temperature information；
The temperature distribution information on heating object surface is obtained according to the temperature information；
Frequency, phase and the power for emitting the microwave source microwave according to the temperature distribution information are adjusted, until quilt
The Temperature Distribution difference for heating body surface is less than first threshold.
2. microwave heating control method according to claim 1, which is characterized in that the microwave source is by circulator to micro-
Wave resonance chamber emits microwave；
Microwave that microwave source emits is sent to microwave cavity by the circulator by the second port of circulator, and receives the
The microwave reflection of the microwave cavity feedback mouth of Two-port netwerk, microwave is fed by the microwave reflection by the third port of circulator
Resonant cavity.
3. microwave heating control method according to claim 1 or 2, which is characterized in that the acquisition heating object body surface
Before the temperature information in the multiple sites in face, further include：
During microwave source emits microwave, detection obtains the feedback mouth parameter information of microwave cavity, determines when feedforward mouth is anti-
Penetrate the frequency, phase and power of microwave；
According to the frequency, phase and power of the microwave reflection, control microwave source is sent out by circulator to the microwave cavity
The microwave for penetrating original frequency and power carries out microwave heating to the heating object of the microwave resonance intracavitary.
4. microwave heating control method according to claim 3, which is characterized in that obtain the feedback of microwave cavity in detection
Before the step of mouth parameter information, further include：
Obtain the heating parameters and target temperature of the heating object of setting, wherein the heating parameters include heating object
Water content parameter and/or heating location information；
According to the heating parameters and target temperature, control microwave source has initial frequency by circulator to microwave cavity transmitting
The microwave of rate, phase and power.
5. microwave heating control method according to claim 1 or 2, which is characterized in that described according to the Temperature Distribution
Information is adjusted the frequency, phase and the power that export microwave, until the Temperature Distribution difference on heating object surface is less than
After the step of first threshold, further include：
According to the temperature information, the mean temperature on heating object surface is obtained, when the mean temperature reaches target temperature
When, it controls the microwave source and stops transmitting microwave.
6. microwave heating control method according to claim 5, which is characterized in that stop transmitting controlling the microwave source
After the step of microwave, further include：
Detection obtains the load condition of microwave cavity；
When it is to be mounted with heating object to detect the load condition of the microwave cavity, monitoring heating object surface is more
The temperature information in a site, and according to the temperature information, obtain the mean temperature on heating object surface；
When the difference of target temperature and the mean temperature reaches second threshold, controls the microwave source and re-emit microwave.
7. microwave heating control method according to claim 1 or 2, which is characterized in that further include step：
During microwave source emits microwave, detection obtains the load condition of microwave cavity；
When it is unloaded to detect the load condition of the microwave cavity, controls the microwave source and close, and be switched to standby
State.
8. a kind of microwave heating control system, which is characterized in that including：
Temperature information acquisition module, for during microwave source emits microwave to heating object, detection to be obtained and heated
The temperature information in the multiple sites of body surface；
Temperature Distribution acquisition module, the temperature distribution information for obtaining heating object surface according to the temperature information；
Microwave output control module, frequency, phase for currently exporting microwave to power source according to the temperature distribution information
It is adjusted with power, until the Temperature Distribution difference on heating object surface is less than first threshold.
9. a kind of computer equipment, including memory, processor and storage are on a memory and the meter that can run on a processor
Calculation machine program, which is characterized in that the processor realizes any one of claim 1 to 7 institute when executing the computer program
The step of stating microwave heating control method.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
The step of microwave heating control method described in any one of claim 1 to 7 is realized when being executed by processor.
11. a kind of microwave heating control device, which is characterized in that including：Microwave source, temperature sensor and processor；It is described micro-
Wave source one end connection processing device, the other end connect microwave cavity, and the more infrared temperature sensors are set to the microwave
Within resonant cavity and it is connected to the processor.
The processor is for executing microwave heating control method as described in any one of claim 1 to 7.
12. microwave heating control device according to claim 11, which is characterized in that the temperature sensor is mostly furious
Each detection eye of outer temperature sensor, the more infrared temperature sensors places heating object towards microwave cavity
The setting regions in space is uniformly distributed, and the temperature information for detecting microwave resonance intracavitary heating object is simultaneously sent to the place
Manage device.
13. microwave heating control device according to claim 11, which is characterized in that further include circulator, the annular
Device is connected between the microwave source and the microwave cavity, the output of the first port connection microwave source of the circulator
End, the second port and third port of the circulator are separately connected microwave cavity；
The microwave of transmitting is transmitted to circulator by the microwave source by first port, and microwave is passed through second end by the circulator
Mouth is sent to microwave cavity, and receives the microwave reflection of the microwave cavity feedback mouth of second port, and the microwave reflection is led to
It crosses the third port and is fed into microwave cavity.
14. according to claim 11 to 13 any one of them microwave heating control device, which is characterized in that the Microwave emission
Device includes multigroup microwave source and circulator, microwave source one end connection processing device described in every group, and the other end connects the of circulator
Single port, the second port and third port of circulator described in every group are separately connected microwave cavity；Wherein, every group of microwave source and
Circulator is uniformly distributed in around the cavity of microwave cavity.
15. a kind of microwave heating equipment, which is characterized in that including such as claim 11 to 14 any one of them microwave heating control
Device processed and microwave cavity.
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| CN109511191A (en) * | 2018-12-17 | 2019-03-22 | 四川大学 | A kind of uniformly heated method and apparatus of realization microwave based on temperature feedback and phased array |
| CN109661056A (en) * | 2018-12-17 | 2019-04-19 | 京信通信系统（中国）有限公司 | A kind of microwave equipment |
| CN109666924A (en) * | 2018-12-20 | 2019-04-23 | 长沙新材料产业研究院有限公司 | A kind of circulator protection system and control method |
| CN109714849A (en) * | 2018-12-19 | 2019-05-03 | 京信通信系统（中国）有限公司 | A kind of hand-held heating device |
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| CN109661056A (en) * | 2018-12-17 | 2019-04-19 | 京信通信系统（中国）有限公司 | A kind of microwave equipment |
| CN109511191A (en) * | 2018-12-17 | 2019-03-22 | 四川大学 | A kind of uniformly heated method and apparatus of realization microwave based on temperature feedback and phased array |
| CN109714849A (en) * | 2018-12-19 | 2019-05-03 | 京信通信系统（中国）有限公司 | A kind of hand-held heating device |
| CN109666924A (en) * | 2018-12-20 | 2019-04-23 | 长沙新材料产业研究院有限公司 | A kind of circulator protection system and control method |
| CN109756036A (en) * | 2019-02-28 | 2019-05-14 | 杨士中 | The conversion method and system of a kind of microwave to direct current |
| CN110437997A (en) * | 2019-09-04 | 2019-11-12 | 董继东 | Microwave rewarming resuscitation instruments for rewarming recovery |
| CN110719657A (en) * | 2019-11-05 | 2020-01-21 | 贵州师范学院 | Microwave uniform heating device and method for plastic |
| CN110719657B (en) * | 2019-11-05 | 2024-04-09 | 贵州师范学院 | Microwave uniform heating device and method for plastics |
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Effective date of registration: 20200109 Address after: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Applicant after: Jingxin Communication System (China) Co., Ltd. Address before: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Applicant before: Jingxin Communication System (China) Co., Ltd. Applicant before: Jingxin Communication System (Guangzhou) Co., Ltd. Applicant before: Jingxin Communication Technology (Guangzhou) Co., Ltd. Applicant before: TIANJIN COMBA TELECOM SYSTEMS CO., LTD. |
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Application publication date: 20181009 |