CN111237814A - Cooking utensil monitoring and adjusting method and system - Google Patents
Cooking utensil monitoring and adjusting method and system Download PDFInfo
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- CN111237814A CN111237814A CN202010032729.2A CN202010032729A CN111237814A CN 111237814 A CN111237814 A CN 111237814A CN 202010032729 A CN202010032729 A CN 202010032729A CN 111237814 A CN111237814 A CN 111237814A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C5/00—Stoves or ranges for liquid fuels
- F24C5/16—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
- F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a method and a system for monitoring and adjusting a cooker, wherein the method comprises the following steps: sending a radar emission signal to a cooking container on the stove in real time; receiving reflected signals reflected by the cooking container, the liquid level or/and the food material in real time; acquiring liquid level state information of the cooking container according to the reflection signal; and adjusting the heating power of the cooker according to the liquid level state information. The invention aims to provide a cooking utensil monitoring and adjusting method and system, which can monitor the liquid level state of a cooking container in real time through a radar module, feed back the information of the liquid level state to a cooking utensil, and perform corresponding operation on the cooking utensil to avoid the phenomena of overflowing or pot drying and the like.
Description
Technical Field
The invention relates to the technical field of intelligent kitchen utensils, in particular to a kitchen utensil monitoring and adjusting method and system.
Background
Along with the development of the internet of things technology, the functions of the smart home become more and more abundant, and the household appliances integrate sensors on the basis of the original traditional functions, so that the intelligent function is realized. At present, partial products capable of automatically monitoring the water level height in a stockpot are available in the market, and a reminder can be given when water in the pot is dried or overflows.
In the existing scheme for automatically identifying the liquid level height in the cooking container, a method for adding a sensor is mostly adopted, however, due to the difference between the cooking mode and the user preference, the types of the cooking container are full of marbles, and the sensors are added on all the containers, so that the use cost of the user is undoubtedly increased, and the realization is difficult; meanwhile, the cooking container is contacted with a fire source, the temperature is extremely high, the requirement on high temperature resistance of electronic equipment is strict, and the arrangement of sensors is greatly limited. In the prior art, the situations of overflowing, drying and the like are judged in a simple camera and image recognition mode, and the defects of the prior art are that the prior art is easily influenced by indoor light and oil smoke shielding.
Disclosure of Invention
The invention aims to provide a cooking utensil monitoring and adjusting method and system, which can monitor the liquid level state of a cooking container in real time through a radar module, feed back the information of the liquid level state to a cooking utensil, and enable the cooking utensil to perform corresponding operation, so that the phenomena of overflowing or pot drying and the like are avoided.
In order to achieve the purpose, the invention adopts the following technical scheme: a cooking utensil monitoring and adjusting method comprises the following steps:
sending a radar emission signal to a cooking container on the stove in real time;
receiving reflected signals reflected by the cooking container, the liquid level or/and the food material in real time;
acquiring liquid level state information of the cooking container according to the reflection signal;
and adjusting the heating power of the cooker according to the liquid level state information.
Preferably, the heating power of the cooker is adjusted according to the liquid level state information, specifically, whether overflow or pan drying occurs is judged, and if yes, the heating power of the cooker is reduced or is adjusted to zero.
Preferably, the information on the liquid level state of the cooking container is acquired according to the reflection signal, and specifically:
extracting information of the targets, clustering a plurality of targets, judging liquid level clustering of the liquid level in the cooking container according to information characteristics of the clustering, wherein information change of the liquid level clustering is change of liquid level state information, tracking the change of the liquid level state information in real time, judging whether overflow or pan drying occurs or not according to the change of the liquid level state information, and if yes, adjusting heating power of the cooker.
Preferably, the extracting of the information of the target includes extracting distance information L of the target from the radar, specifically:
and obtaining the time delay delta t according to the sending time of the radar transmitting signal and the feedback time of the reflected signal, and calculating and obtaining the distance information L according to the time delay delta t.
Preferably, the distance information L is calculated by the formula L ═ c × △ f/2 k;
where c is the propagation velocity of the signal in air and k is the proportional coefficient of the frequency difference △ f and the time delay △ t of the reflected signal relative to the transmitted signal.
Preferably, the extracting of the information of the target includes extracting liquid level height information h, specifically:
and reading a fixed frequency difference △ f of the reflected signal and the radar transmitting signal in the same period, and calculating liquid level height information h according to the frequency difference △ f.
Preferably, the liquid level height information h is calculated by substituting the frequency difference △ f into the following equation:
h＝Lt-c*△f/2k；
where Lt is the fixed distance of the radar from the bottom of the cooking vessel, c is the propagation velocity of the signal in air, and k is the proportional coefficient between the frequency difference △ f and the time delay △ t of the reflected signal relative to the transmitted signal.
Preferably, the extracting of the target information includes extracting an angle of arrival θ, specifically:
and calculating to obtain the arrival angle theta according to the reflected signals of the target reflected on different antenna units.
Preferably, the angle of arrival θ is calculated according to the following formula:
θ＝arcsin(λ*△Ф/d0)；
where λ is the wavelength of the signal, △ Φ is the phase difference of the reflected signals received by the two receiving antennas, d0Is the spacing of two receiving antenna elements that receive the reflected signal.
Preferably, clustering the plurality of targets specifically includes: and dividing a plurality of clusters according to the distance information L of all the target points.
Preferably, the information characteristics of the clusters include zone edges, area sizes, smoothness of distance information and history records of the clusters.
Preferably, the change of the liquid level state information is tracked in real time, the heating power of the cooker is adjusted according to the change of the liquid level state information, and whether the overflow or the dry pan occurs is judged, specifically:
judging whether overflow occurs: and comparing the historical records of the liquid level clusters, judging whether the conditions of rapid reduction of distance information and unstable distance information or clustering area in the original liquid level clusters occur, if so, outputting an overflow signal, and reducing the heating power of the cooker.
Preferably, whether the situations that the distance information in the original liquid level cluster is rapidly reduced and the distance information or the clustering area is unstable are judged, if not, whether the pan drying happens is further judged, and the method specifically comprises the following steps: and comparing the historical records of the liquid level clustering, judging whether the situation that the liquid level clustering distance is gradually increased and is close to a critical value or the clustering area is gradually reduced occurs, if so, judging that the liquid level clustering distance is a dry pot signal, and adjusting the heating power of the cooker to be zero.
Preferably, whether the liquid level clustering distance is gradually increased and close to a critical value or the clustering area is gradually reduced is judged, and if not, the current liquid level clustering information is recorded to the historical record.
Preferably, the method further comprises a step of drawing a dot diagram, wherein x and y coordinate axes are established along the liquid level plane, and the dot diagram is drawn as the liquid level state information according to the information of the target and the division of the clusters.
A cooktop monitoring and regulating system, comprising:
the radar transmitting module is used for sending a radar transmitting signal to a cooking container on the stove in real time;
the reflection receiving module is used for receiving reflection signals reflected by the cooking container, the liquid level or/and the food material in real time;
the signal processing module is used for acquiring liquid level state information of the cooking container according to the reflection signal;
the data processing module is used for judging whether the heating power of the cooker needs to be adjusted or not according to the liquid level state information;
and the feedback adjusting module is used for sending an adjusting signal for adjusting the heating power of the cooker.
A kitchen range monitoring and adjusting system comprises a range hood and an intelligent terminal, wherein the range hood is in communication connection with the intelligent terminal;
the range hood includes:
the radar transmitting module is used for sending a radar transmitting signal to a cooking container on the stove in real time;
the reflection receiving module is used for receiving reflection signals reflected by the cooking container, the liquid level or/and the food material in real time;
the signal processing module is used for acquiring liquid level state information of the cooking container according to the reflection signal;
the data processing module is used for judging whether the heating power of the cooker needs to be adjusted or not according to the liquid level state information;
the feedback adjusting module is used for sending an adjusting signal for adjusting the heating power of the cooker;
and the intelligent terminal is used for receiving the adjusting signal and sending out the reminding information.
A kitchen range monitoring and adjusting system comprises a range hood and a kitchen range, wherein the range hood is in communication connection with the kitchen range;
the range hood includes:
the radar transmitting module is used for sending a radar transmitting signal to a cooking container on the stove in real time;
the reflection receiving module is used for receiving reflection signals reflected by the cooking container, the liquid level or/and the food material in real time;
the signal processing module is used for acquiring liquid level state information of the cooking container according to the reflection signal;
the data processing module is used for judging whether the heating power of the cooker needs to be adjusted or not according to the liquid level state information;
the feedback adjusting module is used for sending an adjusting signal for adjusting the heating power of the cooker;
the cooking appliance comprises:
and the receiving and adjusting module is used for receiving the adjusting signal and adjusting the heating power of the cooker according to the adjusting signal.
A kitchen range monitoring and adjusting system comprises a range hood, a kitchen range and an intelligent terminal, wherein the range hood is in communication connection with the intelligent terminal, and the intelligent terminal is in communication connection with the kitchen range;
the range hood includes:
the radar transmitting module is used for sending a radar transmitting signal to a cooking container on the stove in real time;
the reflection receiving module is used for receiving reflection signals reflected by the cooking container, the liquid level or/and the food material in real time;
the signal processing module is used for acquiring liquid level state information of the cooking container according to the reflection signal;
the data processing module is used for judging whether the heating power of the cooker needs to be adjusted or not according to the liquid level state information;
the feedback adjusting module is used for sending an adjusting signal for adjusting the heating power of the stove to the intelligent terminal;
the intelligent terminal is used for receiving the adjusting signal and sending out the reminding information, receiving an adjusting execution signal of a user to the cooker and sending out the adjusting execution signal to the cooker;
the cooking appliance comprises:
and the receiving and adjusting module is used for receiving the adjusting execution signal and adjusting the heating power of the cooker according to the adjusting execution signal.
Preferably, the radar transmitting module comprises a signal source, a line selector switch, a power amplifier and a plurality of transmitting antenna units, wherein the power amplifier and the transmitting antenna units are respectively provided with a plurality of signal sources; the signal source is used for providing a source signal; the line switch is used for switching among a plurality of power amplifiers; the power amplifier is used for amplifying a source signal, and the transmitting antenna unit is used for converting the amplified source signal into a transmitting signal and transmitting the transmitting signal; the reflection receiving module comprises a plurality of receiving antenna units.
Preferably, the distance between the centers of the reflection receiving module and the radar transmitting module is greater than twice the wavelength of the transmitted signal, and the distance between the transmitting antenna units is 0.4-0.6 times the wavelength; the distance between the receiving antenna units is 0.4-0.6 times of wavelength.
Preferably, the signal processing module includes a low noise amplifier, a mixer, an ADC sampling circuit, and a digital signal front end, where the low noise amplifier is configured to amplify the received reflected signal; the frequency mixer is used for mixing the received reflection signal with a source signal sent by the signal source to obtain an intermediate frequency signal; the ADC sampling circuit is used for sampling the intermediate frequency signal to obtain a sampling signal; the digital signal front end is used for receiving the sampling signal and outputting the frequency value of the sampling signal.
Preferably, the feedback adjusting module comprises a first RF module and a first antenna, and the first RF module is used for transmitting or receiving the execution signal; the first antenna is used for converting the execution signal into an electromagnetic wave form and transmitting the electromagnetic wave form.
Preferably, the receiving and adjusting module comprises a micro control unit, a second RF module and a second antenna, wherein the second antenna is used for receiving and converting the electromagnetic wave signal into an execution signal; the second RF module transmits or receives an execution signal; the micro control unit is used for receiving the execution signal and executing corresponding functions according to the execution signal.
By adopting the structure, the liquid level state of the cooking container is monitored by the cooker monitoring and adjusting system, the information of the liquid level state of the cooking container is calculated, the information of the liquid level state is sent to the cooker or/and the intelligent terminal, and the cooker and the intelligent terminal perform corresponding operation or reminding according to the received information of the liquid level state, so that the phenomenon of overflowing or pot drying caused by untimely operation is avoided.
The system can accurately identify the liquid level state of the cooking container in real time, avoids interference such as cooking smoke, temperature, humidity and light, does not need to be additionally provided with a sensor, and can be suitable for different cooking containers.
Drawings
The drawings are further illustrative of the invention and the content of the drawings does not constitute any limitation of the invention.
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of a system architecture according to embodiment 1 of the present invention;
fig. 3 is a schematic layout of a receiving antenna unit and a transmitting antenna unit according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of a radar module ranging principle according to embodiment 1 of the present invention;
fig. 5 is a schematic view of the principle of angle measurement of the radar module of embodiment 1 of the present invention;
FIG. 6 is a schematic diagram of target points and coordinates according to embodiment 1 of the present invention;
FIG. 7 is a schematic diagram of object clustering in example 1 of the present invention;
fig. 8 is a logic diagram for determining whether a pan is dry or overflowing according to embodiment 1 of the present invention.
FIG. 9 is a schematic diagram of the system architecture of embodiment 2 of the present invention;
FIG. 10 is a schematic diagram of the system architecture of embodiment 3 of the present invention;
fig. 11 is a system architecture diagram according to embodiment 4 of the present invention.
Wherein: the device comprises a smoke machine 1, a kitchen range 2, a short-range wireless network 3, an intelligent terminal 4, a signal source 5, a line selector switch 6, a power amplifier 7, a transmitting antenna unit 8, a receiving antenna unit 9, a low noise amplifier 10, a mixer 11, an ADC sampling circuit 12, a digital signal front end 13, a first RF module 14, a first antenna 15, a micro control unit 16, a second RF module 17, a second antenna 18 and a data processing module 19.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example 1
Referring to fig. 1 to 8, a monitoring and adjusting method for a cooking range of the present embodiment includes the following steps:
sending a radar emission signal to a cooking container on the stove in real time;
receiving reflected signals reflected by the cooking container, the liquid level or/and the food material in real time;
acquiring liquid level state information of the cooking container according to the reflection signal;
and adjusting the heating power of the cooker according to the liquid level state information.
Preferably, the heating power of the cooker is adjusted according to the liquid level state information, specifically, whether overflow or pan drying occurs is judged, and if yes, the heating power of the cooker is reduced or is adjusted to zero.
Preferably, the information on the liquid level state of the cooking container is acquired according to the reflection signal, and specifically:
extracting information of the targets, clustering a plurality of targets, judging liquid level clustering of the liquid level in the cooking container according to information characteristics of the clustering, wherein information change of the liquid level clustering is change of liquid level state information, tracking the change of the liquid level state information in real time, judging whether overflow or pan drying occurs or not according to the change of the liquid level state information, and if yes, adjusting heating power of the cooker.
The information of the target may be distance information, angle information, and the like.
Preferably, before the extracting, the method further comprises filtering the received reflected signal.
Preferably, the extracting of the information of the target includes extracting distance information L of the target from the radar, specifically:
and obtaining the time delay delta t according to the sending time of the radar transmitting signal and the feedback time of the reflected signal, and calculating and obtaining the distance information L according to the time delay delta t.
For any one reflected signal, a fixed frequency difference Δ f exists between the reflected signal and the transmitted signal in the same period at any time, and the value of the frequency difference Δ f is proportional to the time delay Δ t of the reflected signal relative to the transmitted signal.
The calculation formula of the distance information L is L-c- △ f/2 k;
where c is the propagation velocity of the signal in air and k is the proportional coefficient of the frequency difference △ f and the time delay △ t of the reflected signal relative to the transmitted signal.
Preferably, the extracting of the information of the target includes extracting liquid level height information h, specifically:
and reading a fixed frequency difference △ f of the reflected signal and the radar transmitting signal in the same period, and calculating liquid level height information h according to the frequency difference △ f.
The reflected signal is transmitted to the target and then returns, a delay exists between the reflected signal and the transmitted signal, the frequency of the reflected signal is the frequency difference delta f between the transmitted signal and the reflected signal caused by the delay, and the frequency difference delta f between the transmitted signal and the reflected signal is read.
The liquid level height information h is calculated by substituting the frequency difference △ f into the following equation:
h＝Lt-c*△f/2k；
where Lt is the fixed distance of the radar from the bottom of the cooking vessel, c is the propagation velocity of the signal in air, and k is the proportional coefficient between the frequency difference △ f and the time delay △ t of the reflected signal relative to the transmitted signal.
Preferably, the extracting of the target information includes extracting an angle of arrival θ, specifically:
and calculating to obtain the arrival angle theta according to the reflected signals of the target reflected on different antenna units.
The angle of arrival θ is calculated according to the following formula:
θ＝arcsin(λ*△Ф/d0)；
where λ is the wavelength of the signal, △ Φ is the phase difference of the reflected signals received by the two receiving antennas, d0Is the spacing of two receiving antenna elements that receive the reflected signal.
The reading step of theta comprises the following steps: and receiving the reflected signals, wherein when the reflected signals do not arrive along the normal direction, the path length reaching each receiving antenna is different, and the arrival angles of the received reflected signals are nearly the same due to the fact that the distance between the radar transmitting position and the liquid level of the cooking container is larger as can be seen from the geometrical relation. The difference between the distances from the reflected signal to the two receiving antenna units is known as Δ L ═ d from the geometrical relationship0Sin θ, where Δ L is λ Δ Φ, λ is the wavelength of the signal, and Δ Φ is the phase difference between the reflected signals of the two receiving antenna elements, that is, θ is arcsin (λ Δ Φ/d)0) Can be calculated.
Calculating the coordinate information a of the target point according to the following formula:
a(x，y)＝a(L*tanθx，L*tanθy)；
where L is distance information of the target point, θxFor the vector decomposition of the angle of arrival theta in the x coordinate axis of the coordinate system, thetayIs a vector decomposition of the angle of arrival theta along the y coordinate axis of the coordinate system. Meanwhile, x and y coordinate axes are established along the liquid level plane, and theta is decomposed into theta according to vectorsxAnd thetayIn the actual layout of the antenna array, the receiving antenna units are binary arrays on the x-axis and the y-axis, that is, the arrival angle θ of the target point detected by the radar is θ on the rectangular coordinate axisxAnd thetayAnd adding the target distance information L, the coordinate a of the target point on the coordinate system parallel to the liquid level and the distance information L can be drawn. Any point on the liquid surface is determined based on the distance information L and thetaxAnd thetayAnd the information can judge the position of the coordinate axis, and provides a basis for drawing the clustering graph subsequently.
Preferably, clustering the plurality of targets specifically includes: and dividing a plurality of clusters according to the distance information L of all the target points.
The target points generally refer to points of targets such as a pan body and other external environments, a liquid level, and a plurality of different food materials, and specifically, assume that a pan body on the cooker includes a food material a, a food material B, a food material C, and liquid, and are divided into 5 distance clusters, namely, a distance cluster a (the pan body and other external environments), a distance cluster B (the liquid level), a distance cluster C (the food material a), a distance cluster D (the food material B), and a distance cluster E (the food material C), according to distance information L.
Preferably, the information characteristics of the clusters include zone edges, area sizes, smoothness of distance information and history records of the clusters.
Preferably, the change of the liquid level state information is tracked in real time, the heating power of the cooker is adjusted according to the change of the liquid level state information, and whether the overflow or the dry pan occurs is judged, specifically:
judging whether overflow occurs: and comparing the historical records of the liquid level clusters, judging whether the conditions of rapid reduction of distance information and unstable distance information or clustering area in the original liquid level clusters occur, if so, outputting an overflow signal, and reducing the heating power of the cooker.
The rapid reduction of the distance information in the original liquid level cluster is a judgment standard pre-stored in the system, and the judgment standard is test data when the liquid level bubbles and overflows in the actual life.
Preferably, whether the situations that the distance information in the original liquid level cluster is rapidly reduced and the distance information or the clustering area is unstable are judged, if not, whether the pan drying happens is further judged, and the method specifically comprises the following steps: and comparing the historical records of the liquid level clustering, judging whether the situation that the liquid level clustering distance is gradually increased and is close to a critical value or the clustering area is gradually reduced occurs, if so, judging that the liquid level clustering distance is a dry pot signal, and adjusting the heating power of the cooker to be zero.
The critical value is a judgment standard which is pre-stored in the system and is test data when the pot drying is about to occur in real life.
Preferably, whether the liquid level clustering distance is gradually increased and close to a critical value or the clustering area is gradually reduced is judged, and if not, the current liquid level clustering information is recorded to the historical record.
Preferably, the method further comprises a step of drawing a dot diagram, wherein x and y coordinate axes are established along the liquid level plane, and the dot diagram is drawn as the liquid level state information according to the information of the target and the division of the clusters.
And dividing the information of the target and each cluster, and displaying the liquid level state information through a cluster point diagram so as to record and judge the liquid level state information in real time. Specifically, when the size of the edge or area of a certain cluster is determined, the previously recorded liquid level state information can be directly compared with the real-time dot diagram of the liquid level state information. In addition, the information of the point diagram can be sent to the intelligent terminal, the point diagram drawn through radar signal feedback can be compared with the existing camera, the interference of smoke can be avoided, and a user can visually observe the change of the liquid level state.
A cooktop monitoring and regulating system, comprising:
the radar transmitting module is used for sending a radar transmitting signal to a cooking container on the cooker 2 in real time;
the reflection receiving module is used for receiving reflection signals reflected by the cooking container, the liquid level or/and the food material in real time;
the signal processing module is used for acquiring liquid level state information of the cooking container according to the reflection signal;
the data processing module is used for judging whether the heating power of the cooker 2 needs to be adjusted or not according to the liquid level state information;
and the feedback adjusting module is used for sending an adjusting signal for adjusting the heating power of the cooker 2.
The radar transmitting module, the reflection receiving module, the signal processing module, the data processing module 19 and the feedback adjusting module of the system can be integrated in the existing range hood 1, so that the range hood 1 has the functions of automatically monitoring and adjusting the cooking container on the cooker 2 to prevent overflow or dry the cooker.
Specifically, the range hood integrated with the kitchen range monitoring and adjusting system comprises a radar transmitting module, a reflection receiving module, a signal processing module, a data processing module 19 and a feedback adjusting module.
Preferably, the radar transmitting module comprises a signal source 5, a line selector switch 6, a power amplifier 7 and a plurality of transmitting antenna units 8, wherein the power amplifiers 7 and the transmitting antenna units 8 are provided; the signal source 5 is used for providing a source signal; the line switch 6 is used for switching among a plurality of power amplifiers 7; the power amplifier 7 is configured to amplify a source signal, and the transmitting antenna unit 8 is configured to convert the amplified source signal into a transmitting signal and transmit the transmitting signal; the reflection reception module includes a plurality of reception antenna units 9.
Specifically, the transmission signal emitted by the transmission antenna unit 8 is preferably a signal of 60GHz to 67 GHz. The center distance between the reflection receiving module and the radar transmitting module is larger than the double wavelength of the transmitted signal, and the distance between the transmitting antenna units 8 is 0.4-0.6 times of the wavelength; the spacing between the individual receiving antenna elements 9 is 0.4-0.6 wavelengths. The transmitting antenna elements 8 are preferably provided in three and the receiving antenna elements 9 are preferably provided in four. The center distance between the reflection receiving module and the radar transmitting module refers to the distance between the middle parts of the four receiving antenna units 9 and the middle parts of the three transmitting antenna units 8.
Preferably, the signal processing module includes a low noise amplifier 10, a mixer 11, an ADC sampling circuit 12 and a digital signal front end 13, where the low noise amplifier 10 is configured to amplify the received reflected signal; the mixer 11 is configured to mix the received reflection signal with a source signal sent by the signal source 5 to obtain an intermediate frequency signal; the ADC sampling circuit 12 is configured to sample the intermediate frequency signal to obtain a sampled signal; the digital signal front end 13 is configured to receive the sampling signal and output a frequency value of the sampling signal.
Preferably, the feedback adjusting module includes a first RF module 14 and a first antenna 15, the first RF module 14 is used for transmitting or receiving the execution signal; the first antenna 15 is used to convert the execution signal into an electromagnetic wave form and transmit it.
Preferably, the reception adjusting module comprises a micro control unit 16, a second RF module 17 and a second antenna 18, the second antenna 18 being configured to receive and convert the electromagnetic wave signal into an execution signal; the second RF module 17 transmits or receives an execution signal; the micro control unit 16 is used for receiving the execution signal and executing corresponding functions according to the execution signal.
Preferably, the center line of the radar visible angle of the radar transmitting module coincides with the center line of the stove top of the stove 2, and the radar visible angle is of a vertical conical structure. The cone angle of the radar visual angle is 15-20 degrees.
Preferably, the range hood 1 is in communication connection with the kitchen range 2 or the intelligent terminal 4 through a short-range wireless network 3, the short-range wireless network 3 adopts an IOT communication network, and the kitchen range monitoring and adjusting system can interact with other networking equipment through an IOT communication module. The IOT communication network forwards the received electromagnetic waves to the intelligent terminal 4 nearest to the user, and informs the user of cooking overflow or dry pan warning; and simultaneously, sending an instruction to the cooker 2, and shutting down the fire or reducing the fire power of the cooker 2.
Example 2
Referring to fig. 9, a kitchen range monitoring and adjusting system includes a range hood 1 and an intelligent terminal 4, wherein the range hood 1 is in communication connection with the intelligent terminal 4;
the range hood 1 includes:
the radar transmitting module is used for sending a radar transmitting signal to a cooking container on the cooker 2 in real time;
the reflection receiving module is used for receiving reflection signals reflected by the cooking container, the liquid level or/and the food material in real time;
the signal processing module is used for acquiring liquid level state information of the cooking container according to the reflection signal;
the data processing module is used for judging whether the heating power of the cooker 2 needs to be adjusted or not according to the liquid level state information;
the feedback adjusting module is used for sending an adjusting signal for adjusting the heating power of the cooker 2;
and the intelligent terminal 4 is used for receiving the adjusting signal and sending out the reminding information.
Through the range hood 1 that is integrated with cooking utensils monitoring and adjusting system and intelligent terminal 4's communication connection for cooking fume exhauster 1 cooks the container and monitors on to cooking utensils 2, when monitoring to take place to spill over or dry the pot, can send regulating signal to intelligent terminal 4, reminds the user by intelligent terminal 4, avoids the user to forget and is cooking the food, avoids the emergence of fire incident.
Specifically, the intelligent terminal 4 may be a mobile phone, and may also be an intelligent household device with a communication module, such as an intelligent television, an intelligent sound box, an intelligent washing machine, or an intelligent lamp. The people at home can receive the reminding information and go to the kitchen in time to adjust the heating power of the cooking utensils 2 or close the heating function of the cooking utensils 2.
Example 3
Referring to fig. 10, a kitchen range monitoring and adjusting system includes a range hood 1 and a kitchen range 2, wherein the range hood 1 is in communication connection with the kitchen range 2;
the range hood 1 includes:
the radar transmitting module is used for sending a radar transmitting signal to a cooking container on the cooker 2 in real time;
the reflection receiving module is used for receiving reflection signals reflected by the cooking container, the liquid level or/and the food material in real time;
the signal processing module is used for acquiring liquid level state information of the cooking container according to the reflection signal;
the data processing module is used for judging whether the heating power of the cooker 2 needs to be adjusted or not according to the liquid level state information;
the feedback adjusting module is used for sending an adjusting signal for adjusting the heating power of the cooker 2;
the hob 2 comprises:
and the receiving and adjusting module is used for receiving the adjusting signal and adjusting the heating power of the cooker 2 according to the adjusting signal.
Through the range hood that is integrated with cooking utensils monitoring and adjusting system and the communication connection of cooking utensils 2 for cooking utensils 2 goes up cooking container and monitors time measuring to range hood 1, when monitoring to take place to spill over or dry the pot, can send adjusting signal to cooking utensils 2, and cooking utensils 2 adjusts the heating power of self according to adjusting signal, and full intelligent monitoring and regulation need not user's participation, avoids the user to forget and is boiling food, avoids the emergence of fire incident.
Example 4
Referring to fig. 11, a kitchen range monitoring and adjusting system includes a range hood 1, a kitchen range 2 and an intelligent terminal 4, wherein the range hood 1 is in communication connection with the intelligent terminal 4, and the intelligent terminal 4 is in communication connection with the kitchen range 2;
the range hood 1 includes:
the radar transmitting module is used for sending a radar transmitting signal to a cooking container on the cooker 2 in real time;
the reflection receiving module is used for receiving reflection signals reflected by the cooking container, the liquid level or/and the food material in real time;
the signal processing module is used for acquiring liquid level state information of the cooking container according to the reflection signal;
the data processing module is used for judging whether the heating power of the cooker 2 needs to be adjusted or not according to the liquid level state information;
the feedback adjusting module is used for sending an adjusting signal for adjusting the heating power of the stove 2 to the intelligent terminal 4;
the intelligent terminal 4 is used for receiving the adjusting signal and sending out the reminding information, receiving an adjusting executing signal of the user to the cooker 2 and sending out the adjusting executing signal to the cooker 2;
the hob 2 comprises:
and the receiving and adjusting module is used for receiving the adjusting execution signal and adjusting the heating power of the cooker 2 according to the adjusting execution signal.
Through the range hood and intelligent terminal 4 that the integration has cooking utensils monitoring and adjusting system, intelligent terminal 4 and the communication connection of cooking utensils 2, make range hood 1 to cook on the cooking utensils 2 when monitoring and take place to spill over or dry the pot, can send the regulation signal to intelligent terminal 4, remind the user by intelligent terminal 4, user's accessible intelligent terminal 4 sends the regulation execution signal to cooking utensils 2, long-range regulation or the operation of closing of carrying out heating power to cooking utensils 2, through user's participation, the phenomenon of erroneous judgement probably appears when can avoiding the system intellectuality to judge, confirm by the user and adjust the execution signal.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (24)
1. A cooking utensil monitoring and adjusting method is characterized by comprising the following steps:
sending a radar emission signal to a cooking container on the stove in real time;
receiving reflected signals reflected by the cooking container, the liquid level or/and the food material in real time;
acquiring liquid level state information of the cooking container according to the reflection signal;
and adjusting the heating power of the cooker according to the liquid level state information.
2. The cooking utensil monitoring and adjusting method according to claim 1, wherein the heating power of the cooking utensil is adjusted according to the liquid level state information, specifically, whether overflow or pot drying occurs is judged, and if yes, the heating power of the cooking utensil is reduced or the heating power of the cooking utensil is adjusted to zero.
3. The cooking appliance monitoring and adjusting method according to claim 2, wherein the information of the liquid level state of the cooking container is obtained according to the reflection signal, and specifically comprises:
extracting information of the targets, clustering a plurality of targets, judging liquid level clustering of the liquid level in the cooking container according to information characteristics of the clustering, wherein information change of the liquid level clustering is change of liquid level state information, tracking the change of the liquid level state information in real time, judging whether overflow or pan drying occurs or not according to the change of the liquid level state information, and if yes, adjusting heating power of the cooker.
4. The cooking appliance monitoring and adjusting method according to claim 3, wherein extracting information of the target comprises extracting distance information L of a target distance radar, specifically:
and obtaining the time delay delta t according to the sending time of the radar transmitting signal and the feedback time of the reflected signal, and calculating and obtaining the distance information L according to the time delay delta t.
5. The cooking appliance monitoring and adjusting method according to claim 4, wherein the distance information L is calculated by the formula L-c- △ f/2 k;
where c is the propagation velocity of the signal in air and k is the proportional coefficient of the frequency difference △ f and the time delay △ t of the reflected signal relative to the transmitted signal.
6. The cooking appliance monitoring and adjusting method according to claim 4, wherein the information of the target is extracted, including extracting liquid level height information h, specifically:
and reading a fixed frequency difference △ f of the reflected signal and the radar transmitting signal in the same period, and calculating liquid level height information h according to the frequency difference △ f.
7. The cooktop monitoring and adjusting method of claim 6, wherein the liquid level height information h is calculated by substituting the frequency difference △ f into the following formula:
h＝Lt-c*△f/2k；
where Lt is the fixed distance of the radar from the bottom of the cooking vessel, c is the propagation velocity of the signal in air, and k is the proportional coefficient between the frequency difference △ f and the time delay △ t of the reflected signal relative to the transmitted signal.
8. The cooking appliance monitoring and adjusting method according to claim 4, wherein extracting the information of the target comprises extracting an angle of arrival θ, specifically:
and calculating to obtain the arrival angle theta according to the reflected signals of the target reflected on different antenna units.
9. The cooktop monitoring and adjusting method of claim 8, wherein the angle of arrival θ is calculated according to the following formula:
θ＝arcsin(λ*△Ф/d0)；
where λ is the wavelength of the signal, △ Φ is the phase difference of the reflected signals received by the two receiving antennas, d0Is the spacing of two receiving antenna elements that receive the reflected signal.
10. The cooktop monitoring and adjusting method of claim 8, wherein clustering the plurality of targets specifically is: and dividing a plurality of clusters according to the distance information L of all the target points.
11. The cooktop monitoring and adjusting method of claim 3, wherein the clustered information features comprise clustered region edges, area size, distance information smoothness, and history.
12. The cooking utensil monitoring and adjusting method according to claim 11, wherein changes of liquid level state information are tracked in real time, heating power of the cooking utensil is adjusted according to the changes of the liquid level state information, whether overflow or pot drying occurs is judged, and the method specifically comprises the following steps:
judging whether overflow occurs: and comparing the historical records of the liquid level clusters, judging whether the conditions of rapid reduction of distance information and unstable distance information or clustering area in the original liquid level clusters occur, if so, outputting an overflow signal, and reducing the heating power of the cooker.
13. The cooking utensils monitoring and adjusting method of claim 12, characterized in that, whether the conditions of fast reduction of distance information in the stock level cluster and unstable distance information or cluster area occur is judged, if not, whether pan drying occurs is further judged, specifically: and comparing the historical records of the liquid level clustering, judging whether the situation that the liquid level clustering distance is gradually increased and is close to a critical value or the clustering area is gradually reduced occurs, if so, judging that the liquid level clustering distance is a dry pot signal, and adjusting the heating power of the cooker to be zero.
14. The cooking utensils monitoring and adjusting method of claim 13, characterized in that, whether the liquid level clustering distance gradually increases and approaches the critical value or the clustering area gradually decreases is judged, if not, the current liquid level clustering information is recorded to the history.
15. The cooking utensils monitoring and adjusting method of claim 3 further includes a step of drawing a dot diagram, establishing x, y coordinate axes along the liquid level plane, drawing the dot diagram according to the information of the target and the division of the cluster, as the liquid level state information.
16. A cooking utensils monitoring governing system which characterized in that includes:
the radar transmitting module is used for sending a radar transmitting signal to a cooking container on the stove in real time;
the reflection receiving module is used for receiving reflection signals reflected by the cooking container, the liquid level or/and the food material in real time;
the signal processing module is used for acquiring liquid level state information of the cooking container according to the reflection signal;
the data processing module is used for judging whether the heating power of the cooker needs to be adjusted or not according to the liquid level state information;
and the feedback adjusting module is used for sending an adjusting signal for adjusting the heating power of the cooker.
17. A kitchen range monitoring and adjusting system is characterized by comprising a range hood and an intelligent terminal, wherein the range hood is in communication connection with the intelligent terminal;
the range hood includes:
the radar transmitting module is used for sending a radar transmitting signal to a cooking container on the stove in real time;
the reflection receiving module is used for receiving reflection signals reflected by the cooking container, the liquid level or/and the food material in real time;
the signal processing module is used for acquiring liquid level state information of the cooking container according to the reflection signal;
the data processing module is used for judging whether the heating power of the cooker needs to be adjusted or not according to the liquid level state information;
the feedback adjusting module is used for sending an adjusting signal for adjusting the heating power of the cooker;
and the intelligent terminal is used for receiving the adjusting signal and sending out the reminding information.
18. A kitchen range monitoring and adjusting system is characterized by comprising a range hood and a kitchen range, wherein the range hood is in communication connection with the kitchen range;
the range hood includes:
the radar transmitting module is used for sending a radar transmitting signal to a cooking container on the stove in real time;
the reflection receiving module is used for receiving reflection signals reflected by the cooking container, the liquid level or/and the food material in real time;
the signal processing module is used for acquiring liquid level state information of the cooking container according to the reflection signal;
the data processing module is used for judging whether the heating power of the cooker needs to be adjusted or not according to the liquid level state information;
the feedback adjusting module is used for sending an adjusting signal for adjusting the heating power of the cooker;
the cooking appliance comprises:
and the receiving and adjusting module is used for receiving the adjusting signal and adjusting the heating power of the cooker according to the adjusting signal.
19. A kitchen range monitoring and adjusting system is characterized by comprising a range hood, a kitchen range and an intelligent terminal, wherein the range hood is in communication connection with the intelligent terminal, and the intelligent terminal is in communication connection with the kitchen range;
the range hood includes:
the radar transmitting module is used for sending a radar transmitting signal to a cooking container on the stove in real time;
the reflection receiving module is used for receiving reflection signals reflected by the cooking container, the liquid level or/and the food material in real time;
the signal processing module is used for acquiring liquid level state information of the cooking container according to the reflection signal;
the data processing module is used for judging whether the heating power of the cooker needs to be adjusted or not according to the liquid level state information;
the feedback adjusting module is used for sending an adjusting signal for adjusting the heating power of the stove to the intelligent terminal;
the intelligent terminal is used for receiving the adjusting signal and sending out the reminding information, receiving an adjusting execution signal of a user to the cooker and sending out the adjusting execution signal to the cooker;
the cooking appliance comprises:
and the receiving and adjusting module is used for receiving the adjusting execution signal and adjusting the heating power of the cooker according to the adjusting execution signal.
20. The cooking utensils monitoring and adjusting system of any one of claims 16 to 19 wherein the radar transmitting module includes a signal source, a line switch, a power amplifier and a transmitting antenna unit, the power amplifier and the transmitting antenna unit are provided in plurality; the signal source is used for providing a source signal; the line switch is used for switching among a plurality of power amplifiers; the power amplifier is used for amplifying a source signal, and the transmitting antenna unit is used for converting the amplified source signal into a transmitting signal and transmitting the transmitting signal; the reflection receiving module comprises a plurality of receiving antenna units.
21. The cooktop monitoring and adjusting system of claim 20, wherein the center distance between the reflection receiving module and the radar transmitting module is greater than twice the wavelength of the transmitted signal, and the distance between the transmitting antenna units is 0.4-0.6 times the wavelength; the distance between the receiving antenna units is 0.4-0.6 times of wavelength.
22. The cooktop monitoring and adjusting system of claim 20, wherein the signal processing module comprises a low noise amplifier, a mixer, an ADC sampling circuit, and a digital signal front end, the low noise amplifier being configured to amplify the received reflected signal; the frequency mixer is used for mixing the received reflection signal with a source signal sent by the signal source to obtain an intermediate frequency signal; the ADC sampling circuit is used for sampling the intermediate frequency signal to obtain a sampling signal; the digital signal front end is used for receiving the sampling signal and outputting the frequency value of the sampling signal.
23. The cooktop monitoring and regulating system of claim 20, wherein the feedback regulating module comprises a first RF module for transmitting or receiving the actuating signal and a first antenna; the first antenna is used for converting the execution signal into an electromagnetic wave form and transmitting the electromagnetic wave form.
24. The cooktop monitoring and regulating system of claim 18, wherein the receiving and regulating module comprises a micro control unit, a second RF module, and a second antenna for receiving and converting electromagnetic wave signals into actuating signals; the second RF module transmits or receives an execution signal; the micro control unit is used for receiving the execution signal and executing corresponding functions according to the execution signal.
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