Heating circuit and method, cooking equipment, storage medium and product

Abstract

The invention provides a heating circuit and method, cooking equipment, a storage medium and a product. The heating circuit comprises a signal processing circuit, a switching circuit and a control circuit, the signal processing circuit is connected with the switching circuit, and the switching circuit is connected with the control circuit; the signal processing circuit is used for being conducted when the heating circuit is powered on and the safety monitoring function is started, transmitting a non-level signal to a target area, receiving a reflected signal and sending the reflected signal to the switching circuit; the switching circuit is used for being switched on when receiving the infrared reflection signal, generating a first level signal and sending the first level signal to the first pin and / or the second pin of the control circuit; the control circuit is used for sending the first voltage signal to the target area and heating the target area when the first pin and / or the second pin receives the first level signal, and according to the detection method and device, after the non-level signal is sent to the target area, the detection result that the tableware exists in the target area is determined according to the received reflection signal, and the detection precision is improved.

Description

Technical Field

[0001] The present application relates to the field of household appliances, and particularly to a heating circuit, a method, a cooking device, a storage medium and a product. Background Art

[0002] During the process of a user using a cooking device, the cooking device needs to determine whether there are tableware (such as cookware, tableware, etc.) above the heating panel to avoid safety accidents caused by heating without tableware.

[0003] In the related art, usually a weight detection device is arranged inside the cooking device, and the weight above the heating panel is collected by the weight detection device to identify whether there is tableware on the heating panel.

[0004] However, in the case of a large number of uses and a long use time, the detection accuracy of this method will gradually decrease, thereby reducing the user experience. Summary of the Invention

[0005] The present application provides a heating circuit, a method, a cooking device, a storage medium and a product to solve the problem of low detection accuracy of tableware by the cooking device.

[0006] In a first aspect, the present application provides a heating circuit. The heating circuit includes a signal processing circuit, a switching circuit and a control circuit. The signal processing circuit is connected to the switching circuit, and the switching circuit is connected to the control circuit;

[0007] The signal processing circuit is configured to conduct when the heating circuit is powered on and the safety monitoring function is enabled, emit a non-level signal to a target area, receive the reflected signal of the target area and send it to the switching circuit; the non-level signal includes an ultrasonic signal and / or an infrared signal;

[0008] The switching circuit is configured to conduct when receiving the reflected signal, generate a first level signal according to the reflected signal, and send the first level signal to the first pin and / or the second pin of the control circuit; the reflected signal includes an echo signal and / or an infrared reflection signal;

[0009] The control circuit is configured to send a first voltage signal to the target area to heat the target area when the first level signal is received by the first pin and / or the second pin.

[0010] In the present application, by emitting a non-level signal corresponding to the safety monitoring function to the target area, it is determined that there is tableware in the target area when the reflected signal of the target area is collected, and a first level signal is generated, so as to heat the tableware on the target area through the control circuit, improving the detection accuracy of the tableware in the target area.

[0011] Optionally, the safety monitoring function includes an ultrasonic monitoring function; the signal processing circuit includes an ultrasonic signal processing circuit; the ultrasonic signal processing circuit is connected to the switch circuit;

[0012] The ultrasonic signal processing circuit is configured to conduct when the heating circuit is powered on and the ultrasonic monitoring function is enabled, transmit an ultrasonic signal to the target area, receive the echo signal, and send it to the switch circuit.

[0013] In this application, by transmitting an ultrasonic signal to the target area when the ultrasonic monitoring function is enabled and determining that there is tableware in the target area when the echo signal of the target area is received, the detection accuracy of the tableware in the target area is improved.

[0014] Optionally, the ultrasonic signal processing circuit includes a transmitter and a receiver, the switch circuit includes a signal processor, the transmitter and the receiver are both connected to the signal processor, and the signal processor is connected to the first pin of the control circuit;

[0015] The transmitter is configured to send the ultrasonic signal to the target area when the heating circuit is powered on and the ultrasonic monitoring function is enabled;

[0016] The receiver is configured to send the echo signal to the signal processor when the echo signal of the target area is received;

[0017] The signal processor is configured to convert the echo signal into the first-level signal and send the first-level signal to the first pin of the control circuit when the echo signal is received.

[0018] In this application, by transmitting an ultrasonic signal to the target area when the ultrasonic monitoring function is enabled and determining that there is tableware in the target area when the echo signal of the target area is received, and simultaneously generating a first-level signal to realize the heating of the tableware on the target area, the detection accuracy of the tableware in the target area is improved and the heating efficiency is also improved.

[0019] Optionally, the ultrasonic signal processing circuit further includes a timer, and the timer is connected to the transmitter, the receiver, and the signal processor;

[0020] The transmitter is further configured to generate a start instruction and send it to the timer when sending the ultrasonic signal;

[0021] The receiver is further configured to generate an end instruction and send it to the timer when receiving the echo signal;

[0022] A timer, which is used to start timing when receiving the start instruction, and stop timing when receiving the end instruction, obtain the timing duration and send it to the signal processor;

[0023] The signal processor is used to determine the signal transmission distance according to the timing duration. When the signal transmission distance is greater than the first threshold and less than or equal to the second threshold, convert the echo signal into the first level signal and send the first level signal to the first pin of the control circuit; the first threshold is less than the second threshold.

[0024] In this application, by transmitting an ultrasonic signal to the target area when the ultrasonic monitoring function is turned on, determining the signal transmission distance when receiving the echo signal of the target area, and determining that the echo signal is reflected by the tableware according to the size of the signal transmission distance, the detection result that there is tableware in the target area is determined, and the detection accuracy of the tableware in the target area is improved.

[0025] Optionally, the safety detection function includes an infrared detection function, and the signal processing circuit includes an infrared signal processing circuit; the infrared signal processing circuit is connected to the switch circuit;

[0026] The infrared signal processing circuit is used to conduct when the heating circuit is powered on and the infrared monitoring function is turned on, transmit an infrared signal to the target area, receive the infrared reflection signal and send it to the switch circuit.

[0027] In this application, by transmitting an infrared signal to the target area when the infrared monitoring function is turned on, and determining that there is tableware in the target area when receiving the infrared reflection signal of the target area, the detection accuracy of the tableware in the target area is improved.

[0028] Optionally, the infrared signal processing circuit includes a transmitting tube and a receiving tube, and the switch circuit includes an operational amplifier; the transmitting tube is connected to the first pin of the operational amplifier, the receiving tube is connected to the second pin of the operational amplifier, and the first pin of the operational amplifier is also connected to the second pin of the control circuit;

[0029] The transmitting tube is used to conduct when the heating circuit is powered on and the infrared monitoring function is turned on, and send the infrared signal to the target area;

[0030] The receiving tube is used to send a second voltage signal to the operational amplifier when receiving the infrared reflection signal of the target area;

[0031] The operational amplifier is used to generate the first level signal based on the second voltage signal when receiving the second voltage signal, and send the first level signal to the second pin of the control circuit.

[0032] In this application, when the ultrasonic monitoring function is turned on, an ultrasonic signal is transmitted to the target area. When the echo signal of the target area is received, it is determined that there is tableware in the target area, and at the same time, a first-level signal is generated to realize the heating of the tableware on the target area through the control circuit, improving the detection accuracy of the tableware in the target area and the heating efficiency at the same time.

[0033] Optionally, the operational amplifier is further configured to generate a second-level signal when the second voltage signal is not received, and send the second-level signal to the control circuit;

[0034] The control circuit is further configured to stop sending the first voltage signal to the target area based on the second-level signal when the second-level signal is received.

[0035] In this application, when the second voltage signal is not received, the detection result that there is no cookware in the target area is determined, and at the same time, the heating operation of the target area is stopped to avoid safety accidents, improving the safety while improving the detection accuracy.

[0036] In a second aspect, this application provides a heating method, which is applied to the circuit described in any embodiment of the first aspect. The method includes:

[0037] When the power is turned on and the safety monitoring function is turned on, a non-level signal is transmitted to the target area, and the reflection signal of the target area is received; the non-level signal includes an ultrasonic signal and / or an infrared signal;

[0038] A corresponding first-level signal is generated according to the reflection signal; the reflection signal includes an echo signal and / or an infrared reflection signal;

[0039] When the first-level signal corresponding to the echo signal and / or the first-level signal corresponding to the infrared reflection signal is received, a first voltage signal is sent to the target area to heat the target area.

[0040] In a third aspect, this application provides a cooking device, including: a transmitter, a receiver, a transmitting tube, a receiving tube, a memory, a processor, and the circuit described in any embodiment of the first aspect; the transmitter, the receiver, the transmitting tube, and the receiving tube are all connected to the processor;

[0041] The memory is used to store a computer program; the processor is used to execute the computer program stored in the memory to implement the method described in any embodiment of the second aspect.

[0042] Fourthly, the present application provides a computer-readable storage medium storing a computer program, which when executed by a processor, implements the method in any of the embodiments of the second aspect.

[0043] Fifthly, the present application provides a computer program product, which includes a computer program that, when executed by a processor, implements the method in any of the embodiments of the second aspect.

[0044] The heating circuit, method, cooking device, storage medium and product provided by the present application, when the heating circuit is powered on and the safety monitoring function is enabled, emit a non-level signal corresponding to the safety monitoring function to a target area through a signal processing circuit, and determine that tableware exists in the target area when a reflected signal of the target area is collected, and generate a first level signal, so as to heat the tableware on the target area through a control circuit, improving the detection accuracy of the tableware in the target area. Description of the Drawings

[0045] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0046] Figure 1 It is a schematic application diagram of the related art tableware detection method provided by the embodiment of the present application;

[0047] Figure 2 It is one of the structural schematic diagrams of the heating circuit provided by the embodiment of the present application;

[0048] Figure 3 It is another structural schematic diagram of the heating circuit provided by the embodiment of the present application;

[0049] Figure 4 It is the third structural schematic diagram of the heating circuit provided by the embodiment of the present application;

[0050] Figure 5 It is the structural schematic diagram of the ultrasonic signal processing circuit and the switch circuit provided by the embodiment of the present application;

[0051] Figure 6 It is the structural schematic diagram of the infrared signal processing circuit and the switch circuit provided by the embodiment of the present application;

[0052] Figure 7 It is the schematic flow diagram of heating tableware based on the heating circuit provided by the embodiment of the present application;

[0053] Figure 8 Structural schematic diagram of the cooking device provided by the embodiment of the present application;

[0054] Figure 9 Flow schematic diagram of the heating method provided by the embodiment of the present application;

[0055] Figure 10 Structural schematic diagram of the cooking device provided by the embodiment of the present application.

[0056] Reference numerals:

[0057] 100 - Heating circuit; 101 - Signal processing circuit; 102 - Switching circuit; 103 - Control circuit; 104 - Display circuit; 105 - Power supply circuit;

[0058] 1011 - Ultrasonic signal processing circuit; 1012 - Infrared signal processing circuit;

[0059] 10111 - Transmitter; 10112 - Receiver; 10121 - Transmitting tube; 10122 - Receiving tube; 1021 - Signal processor, 1022 - Operational amplifier; 113 - Timer.

[0060] The realization of the object of the present application, functional features and advantages will be further described in conjunction with the embodiments with reference to the drawings. Through the above - mentioned drawings, the specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Specific embodiments

[0061] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are only examples of the devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0062] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in one or more embodiments of this specification are all information and data authorized by the user or fully authorized by all parties. And the collection, use and processing of the relevant data need to comply with the relevant laws, regulations and standards, and corresponding operation entrances are provided for the user to choose to authorize or refuse.

[0063] During the process of a user using a cooking device, the cooking device needs to determine whether there are tableware (such as pots, bowls, etc.) above the heating panel to avoid safety accidents caused by heating without tableware.

[0064] See Figure 1 , in the related art, usually a weight detection device is arranged inside the cooking device, and the weight above the heating panel is collected through the weight detection device to identify whether there is tableware on the heating panel.

[0065] However, in the case of a large number of uses and a long use time, the detection accuracy of this method will gradually decrease, thus reducing the user experience.

[0066] To solve the above problems, the embodiments of the present application provide a heating circuit, a method, a cooking device, a storage medium and a product. When the heating circuit is powered on and the safety monitoring function is enabled, a non-level signal corresponding to the safety monitoring function is emitted to the target area through the signal processing circuit. When the reflected signal of the target area is collected, it is determined that there is tableware in the target area, and a first level signal is generated to heat the tableware on the target area through the control circuit, improving the detection accuracy of the tableware in the target area.

[0067] The following uses specific embodiments to detail the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems. These specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0068] Figure 2 It is one of the structural schematic diagrams of the heating circuit 100 provided by the present application.

[0069] See Figure 2 , the heating circuit 100 includes a signal processing circuit 101, a switch circuit 102, a control circuit 103 and a display circuit 104. The heating circuit 100 is connected to a power supply circuit 105.

[0070] Among them, the signal processing circuit 101 is connected to the switch circuit 102, the switch circuit 102 is connected to the control circuit 103, and the control circuit 103 is connected to the display circuit 104.

[0071] Specifically, the power supply circuit 105 is used to supply power to the heating circuit 100 when the switch is turned on. That is, the heating circuit 100 is powered on. The display circuit 104 is used to display function menus (such as prompt messages for enabling the safety monitoring function, etc.), LED lights, etc.

[0072] This application does not limit the specific implementation forms of the display circuit 104 and the power supply circuit 105. It is only required that the display circuit 104 has the function of display and the power supply circuit 105 has the function of supplying power to the heating circuit.

[0073] The signal processing circuit 101 is used to conduct when the heating circuit 100 is powered on and the safety monitoring function is enabled, emit a non-level signal to the target area, receive the reflected signal from the target area and send it to the switch circuit 102; the non-level signal includes an ultrasonic signal and / or an infrared signal.

[0074] Specifically, the heating circuit 100 includes a safety monitoring function, which refers to the function of identifying whether there is a tableware to be heated in the target area by emitting a non-level signal to the target area and determining whether a reflected signal corresponding to the non-level signal in the target area is received.

[0075] Specifically, the safety monitoring function includes but is not limited to an ultrasonic monitoring function and an infrared monitoring function. Correspondingly, the signal processing circuit 101 includes but is not limited to an ultrasonic signal processing circuit 101 and an infrared signal processing circuit 101, and the non-level signal includes but is not limited to an ultrasonic signal and an infrared signal.

[0076] Among them, the target area refers to the area for placing the tableware to be heated.

[0077] Exemplarily, when the heating circuit 100 is the heating circuit 100 in a cooking device, the target area can indicate the heating area on the panel of the cooking device for placing the tableware to be heated.

[0078] At this time, the tableware to be heated serves as a reflecting surface, which can reflect an echo signal when receiving an ultrasonic signal and reflect an infrared reflection signal when receiving an infrared reflection signal.

[0079] The switch circuit 102 is used to conduct when receiving the reflected signal, generate a first-level signal according to the reflected signal, and send the first-level signal to the first pin and / or the second pin of the control circuit 103; the reflected signal includes an echo signal and / or an infrared reflection signal.

[0080] Specifically, when it is determined that there is tableware to be heated in the target area when receiving the reflected signal, the switch circuit 102 is conducted at this time, and a first-level signal is generated by the switch circuit 102 according to the reflected signal. The first-level signal is used to instruct the control circuit 103 to heat the target area to heat the tableware to be heated on the target area.

[0081] Optionally, the first-level signal is a low-level signal, or the first-level signal is a high-level signal.

[0082] The control circuit 103 is configured to send a first voltage signal to a target area to heat the target area when a first level signal is received at the first pin and / or a first level signal is received at the second pin.

[0083] Specifically, the control circuit 103 instructs a circuit for heating the target area.

[0084] Specifically, the control circuit 103 includes a first pin and a second pin. The first pin is used to receive a first level signal corresponding to an echo signal, and the second pin is used to receive a first level signal corresponding to an infrared reflection signal.

[0085] Optionally, when the ultrasonic monitoring function is enabled, the control circuit 103 sends a first voltage signal to a first target area when a first level signal is received at the first pin to heat the target area.

[0086] Optionally, when the infrared monitoring function is enabled, the control circuit 103 sends a first voltage signal to the target area when a first level signal is received at the second pin to heat the target area.

[0087] Optionally, when both the ultrasonic monitoring function and the infrared monitoring function are enabled, the control circuit 103 sends a first voltage signal to the target area when a first level signal is received at any one or both of the first pin and the second pin to heat the target area. The specific implementation form of the control circuit 103 in this application is not limited, as long as the control circuit 103 can heat the target area.

[0088] Figure 3 This is the second schematic diagram of the structure of the heating circuit 100 provided by this application.

[0089] See Figure 3 The heating circuit 100 is connected to the power supply circuit 105. The signal processing circuit 101 is connected to the switch circuit 102. The switch circuit 102 is connected to the control circuit 103. The control circuit 103 is connected to the display circuit 104. The signal processing circuit 101 includes an ultrasonic signal processing circuit 1011 and an infrared signal processing circuit 1012.

[0090] Among them, the ultrasonic signal processing circuit 1011 is connected to the switch circuit 102, and the infrared signal processing circuit 1012 is connected to the switch circuit 102.

[0091] The ultrasonic signal processing circuit 1011 is configured to conduct when the heating circuit 100 is powered on and the ultrasonic monitoring function is enabled, emit an ultrasonic signal to the target area, receive an echo signal and send it to the switch circuit 102.

[0092] Specifically, when the ultrasonic signal processing circuit 1011 emits an ultrasonic signal to the target area, the ultrasonic signal processing circuit 1011 can be used to receive the echo signal corresponding to the ultrasonic signal in the target area and send the echo signal corresponding to the ultrasonic signal to the switch circuit 102.

[0093] Specifically, when the ultrasonic signal processing circuit 1011 receives the echo signal corresponding to the ultrasonic signal in the target area, it is determined that there is tableware to be heated in the target area, and the above echo signal is the echo signal reflected by the tableware to be heated after receiving the ultrasonic signal.

[0094] Among them, the infrared signal processing circuit 1012 is used to conduct when the heating circuit 100 is powered on and the infrared monitoring function is enabled, emit an infrared signal to the target area, receive the infrared reflection signal and send it to the switch circuit 102.

[0095] Specifically, when the infrared signal processing circuit 1012 emits an infrared signal to the target area, the infrared signal processing circuit 1012 can be used to receive the infrared reflection signal corresponding to the infrared signal in the target area and send the infrared reflection signal corresponding to the infrared signal to the switch circuit 102.

[0096] Specifically, when the infrared signal processing circuit 1012 receives the infrared reflection signal corresponding to the infrared signal in the target area, it is determined that there is tableware to be heated in the target area, and the above infrared reflection signal is the infrared signal reflected by the tableware to be heated after receiving the infrared signal.

[0097] It can be understood that based on the ultrasonic signal and the infrared signal, tableware to be heated of any material can be detected. For example, the tableware to be heated can be a metal tableware or a non-metal tableware.

[0098] Figure 4 This is the third structural schematic diagram of the heating circuit provided by the present application.

[0099] See Figure 4 , the heating circuit 100 is connected to the power supply circuit 105. The signal processing circuit 101 is connected to the switch circuit 102, the switch circuit 102 is connected to the control circuit 103, the control circuit 103 is connected to the display circuit 104, and the signal processing circuit 101 includes an ultrasonic signal processing circuit 1011 and an infrared signal processing circuit 1012.

[0100] Among them, the ultrasonic signal processing circuit 1011 includes a transmitter 10111 and a receiver 10112, and the infrared signal processing circuit 1012 includes a transmitting tube 10121 and a receiving tube 10122. The switch circuit 102 includes a signal processor 1021 and an operational amplifier 1022. The transmitter 10111 and the receiver 10112 are connected to the signal processor 1021, and the transmitting tube 10121 and the receiving tube 10122 are connected to the operational amplifier 1022. The signal processor 1021 is connected, and the operational amplifier 1022 is also connected to the control circuit 103.

[0101] Specifically, the signal processor 1021 is connected to the first pin of the control circuit 103.

[0102] The transmitter 10111 is used to send ultrasonic signals to the target area when the heating circuit is powered on and the ultrasonic monitoring function is enabled.

[0103] Specifically, when the heating circuit 100 is powered on and the ultrasonic monitoring function is enabled, the transmitter 10111 can send ultrasonic signals to the target area.

[0104] Optionally, parameters such as the frequency and pulse width of the ultrasonic signal (or pulse signal) can be set according to actual requirements.

[0105] The receiver 10112 is used to send the echo signal to the signal processor 1021 when the echo signal of the target area is received.

[0106] Specifically, the echo signal can also be called a pulse signal.

[0107] The signal processor 1021 is used to convert the echo signal into a first-level signal and send the first-level signal to the first pin of the control circuit 103 when the echo signal is received.

[0108] Specifically, the signal processor 1021 can also be called a signal processing chip, which includes multiple pins. Some pins are connected to the transmitter 10111 and are used to send current and voltage signals to the transmitter 10111 when the ultrasonic signal processing circuit 1011 is powered on, so as to start the transmitter 10111 and control the transmitter 10111 to emit ultrasonic signals to the target area.

[0109] Specifically, some pins of the signal processor 1021 are connected to the receiver 10112 and are used to send current and voltage signals to the receiver 10112 when the ultrasonic signal processing circuit 1011 is powered on and the transmitter 10111 emits ultrasonic waves, so as to start the receiver 10112, control the receiver 10112 to receive the echo signal of the target area, and receive the echo signal sent by the receiver 10112.

[0110] Specifically, when the signal processor 1021 receives the echo signal sent by the receiver 10112, it converts the echo signal into a first-level signal and sends it to the control circuit 103 to control the control circuit 103 to heat the target area.

[0111] Continue to refer to Figure 4 , the transmitting tube 10121 is used to conduct when the heating circuit 100 is powered on and the infrared monitoring function is enabled, and send an infrared signal to the target area.

[0112] Specifically, when the heating circuit 100 is powered on and the infrared monitoring function is enabled, the transmitting tube 10121 can send an infrared signal to the target area.

[0113] Optionally, parameters such as the pulse frequency and pulse width of the infrared signal can be set according to actual needs.

[0114] Optionally, parameters such as the pulse frequency and pulse width of the infrared signal can be the same as or different from the pulse parameters of the ultrasonic wave.

[0115] The receiving tube 10122 is used to send a second voltage signal to the operational amplifier 1022 when receiving the infrared reflection signal from the target area;

[0116] The operational amplifier 1022 is used to generate a first-level signal based on the second voltage signal when receiving the second voltage signal, and send the first-level signal to the second pin of the control circuit 103.

[0117] Specifically, the operational amplifier 1022 includes 3 pins, specifically the first pin, the second pin and the third pin. Among them, the transmitting tube 10121 is connected to the first pin of the operational amplifier 1022, the receiving tube 10122 is connected to the second pin of the operational amplifier 1022, and the first pin of the operational amplifier 1022 is also connected to the second pin of the control circuit 103.

[0118] Optionally, the infrared signal processing circuit 1012 further includes other components such as resistors and capacitors. Correspondingly, the third pin of the operational amplifier 1022 can be connected to the above components.

[0119] Optionally, when the operational amplifier 1022 receives the second voltage signal at the second pin, the voltage of the second pin is lower than that of the third pin. At this time, the operational amplifier 1022 generates a first-level signal, that is, a low-level signal.

[0120] Optionally, when the operational amplifier 1022 receives the second voltage signal at the second pin, the voltage of the second pin is lower than that of the third pin. At this time, the operational amplifier 1022 generates a first-level signal, that is, a high-level signal.

[0121] Figure 5 Schematic diagrams of the ultrasonic signal processing circuit and the switching circuit provided for this application.

[0122] Refer to Figure 5 , the ultrasonic signal processing circuit may include a transmitter 10111 (such as Figure 5 T shown in Figure 5 ), a receiver 10112 (such as Figure 5 R shown in

[0123] ), and the switching circuit includes a signal processor 1021 (such as Figure 5 U1 shown in

[0124] Figure 6 Schematic diagrams of the infrared signal processing circuit and the switching circuit provided for this application.

[0125] Refer to Figure 6 , the infrared signal processing circuit may include an emitting diode and a receiving diode, and the switching circuit includes an operational amplifier 1022 (such as Figure 6 U2 shown in

[0126] ). Among them, the emitting diode includes a power supply VCC, a resistor R3, and an emitting triode, and the receiving diode includes a power supply VCC, a resistor R4, and a receiving triode. Figure 6 ), and the first pin of the receiving triode is connected to one end of a resistor R6, and the other end of the resistor R6 is connected to the second pin of the control circuit (such as Figure 6is connected to the pin PC2 shown in the figure. The first pin of the receiving triode is connected to the first end of the capacitor C2. The second pin of the transmitting triode, the second pin of the receiving triode, and the second end of the capacitor C2 are grounded. The second pin of the operational amplifier 1022 (such as the pin 1 shown in Figure 6 is connected to the first pin of the receiving triode. The third pin of the operational amplifier 1022 (such as the pin 2 shown in Figure 6 is connected to one end of the resistor R2. The other end of the resistor R2 is connected to one end of the power supply filtering circuit. The power supply filtering circuit includes a resistor R1 and a capacitor C1, and the other end of the power supply filtering circuit is grounded.

[0127] In some embodiments, the ultrasonic signal processing circuit 1011 further includes a timer 113, and the timer 113 is connected to the transmitter 10111, the receiver 10112, and the signal processor 1021;

[0128] The transmitter 10111 is further configured to generate a start instruction and send it to the timer 113 when sending an ultrasonic signal;

[0129] The receiver 10112 is further configured to generate an end instruction and send it to the timer 113 when receiving an echo signal;

[0130] The timer 113 is configured to start timing when receiving the start instruction, and stop timing when receiving the end instruction, obtain the timing duration and send it to the signal processor 1021.

[0131] The signal processor 1021 is configured to determine the signal transmission distance according to the timing duration. When the signal transmission distance is greater than the first threshold and less than or equal to the second threshold, convert the echo signal into a first-level signal and send the first-level signal to the first pin of the control circuit; the first threshold is less than the second threshold.

[0132] Specifically, when the transmitter 10111 in the ultrasonic signal processing circuit 1011 emits an ultrasonic pulse signal to the target area based on a preset frequency, the echo signal reflected by the tableware to be heated in the target area is received by the receiver 10112 in the ultrasonic signal processing circuit 1011. The duration of this ultrasonic pulse signal sending and reflecting process can be used to determine the path length of the ultrasonic pulse signal propagation.

[0133] It can be understood that in practical applications, the tableware to be heated needs to be placed at a specified position (or area) in the target area, and it can be heated through a heating circuit. Based on this, according to the distances between the target area and the transmitter 10111 and the receiver 10112, the path length range of the ultrasonic pulse signal propagation can be determined.

[0134] If the propagation path length of the ultrasonic pulse signal is too small or too large, the echo signal may not be returned by the tableware to be heated in the target area.

[0135] Specifically, the propagation path length (or signal transmission distance) d of the ultrasonic pulse signal = (t1 - t0) * 340 m / s ÷ 2.

[0136] Among them, the timing duration = t1 - t0. t0 represents the time when the transmitter 10111 sends the first ultrasonic pulse; t1 represents the time when the transmitter 10111 receives the first ultrasonic pulse; 340 m / s represents the propagation speed of the ultrasonic pulse signal in the air.

[0137] Specifically, the first threshold and the second threshold can be specifically set according to the actual situation, and the first threshold is less than the second threshold.

[0138] It can be understood that due to the blind area existing in the ranging method based on ultrasonic signals, the blind area refers to the area where it is impossible to detect an object between the transmitter 10111 and the transmitter 10111 when the acoustic wave energy emitted by the transmitter 10111 may be relatively low at close range, resulting in insufficient echo signals being generated to penetrate the object surface. The distance of the blind area is generally within 3 cm, and the tableware to be heated cannot be detected within the blind area range. Based on this, the first threshold can be set to 3 cm.

[0139] Exemplarily, the second threshold is L + 2D. Wherein, L represents the minimum distance between the target area and the transmitter 10111 and the receiver 10112, and D represents the maximum distance between the target area and the transmitter 10111 and the receiver 10112.

[0140] Figure 7 It is a schematic flow chart of heating tableware based on the heating circuit provided by this application.

[0141] See Figure 7, when the transmitter 10111 sends the first pulse signal to the target area, it sends a start instruction to the timer 113. When the timer 113 receives the start instruction, it starts timing. After the tableware in the target area receives the first pulse signal, it returns the first echo signal. After the receiver 10112 receives the first echo signal, it sends an end instruction to the timer 113. When the timer 113 receives the end instruction, it stops timing and obtains the timing duration. Then it sends the timing duration to the signal processor 10121, and the signal processor 10121 calculates the signal transmission distance based on the timing duration. When the signal transmission distance meets the conditions (such as being greater than the first threshold and less than or equal to the second threshold), the signal processor 10121 converts the echo signal into a first-level signal and sends it to the control electricity 103. When the control electricity 103 receives the first-level signal, it sends a first voltage signal to the target area to heat the tableware.

[0142] Specifically, during the heating process, if a level signal is continuously received, the preset heating area continues to be heated. During the heating process, if the reception of the level signal stops, the heating of the preset heating area stops.

[0143] Optionally, the heating control circuit further includes a standby state. In the standby state, if a level signal is received, it enters the working state and starts the heating function to heat the preset heating area. If a level signal is received, it enters the prohibited heating state and stops heating the preset heating area.

[0144] In some embodiments, the operational amplifier 1022 is further configured to generate a second-level signal and send the second-level signal to the control circuit 103 when the second voltage signal is not received;

[0145] The control circuit 103 is further configured to stop sending the first voltage signal to the target area based on the second-level signal when the second-level signal is received.

[0146] Specifically, when the operational amplifier 1022 does not receive the second voltage signal, the receiver 10112 does not receive the echo signal from the target area, and the receiving tube 10122 does not receive the infrared reflection signal from the target area, then there is no tableware to be heated in the target area. Thus, the operational amplifier 1022 generates a second-level signal and sends the second-level signal to the control circuit 103, so that when the control circuit 103 receives the second-level signal, it stops sending the first voltage signal to the target area, that is, does not heat the target area.

[0147] Optionally, the second-level signal and the first-level signal are opposite-level signals. When the first-level signal is a low-level signal, the second-level signal is a high-level signal. Or, when the first-level signal is a high-level signal, the second-level signal is a low-level signal.

[0148] Figure 8 Schematic diagram of the structure of the cooking device provided for this application.

[0149] See Figure 8 , the cooking device includes a housing, a handle, a heating panel, an infrared monitoring function switch, an ultrasonic detection function switch, a transmitter, a receiver, a transmitting tube, and a receiving tube. A target area is provided on the heating panel. Among them, the transmitter is used to send ultrasonic signals to the target area on the heating panel, and the receiver is used to receive the echo signals of the target area. The transmitting tube is used to send infrared signals to the target area on the heating panel, and the receiving tube is used to receive the infrared reflection signals of the target area. The heating panel is used to place the tableware to be heated. The infrared monitoring function switch is used to control the startup and shutdown of the infrared monitoring function. The ultrasonic monitoring function switch is used to control the startup and shutdown of the ultrasonic monitoring function.

[0150] Optionally, the transmitter, receiver, transmitting tube, and receiving tube can be arranged in the area on the panel other than the preset heating area. The transmitter, receiver, transmitting tube, and receiving tube are parallel to the panel, and the distance between the transmitter, receiver, transmitting tube, and receiving tube and the preset heating area can be greater than or equal to the third threshold and less than the fourth distance. The third threshold can be set according to actual needs.

[0151] For example, the third threshold is 0 cm, and the fourth threshold is the maximum distance D between the target area and the transmitter and receiver. The installation height of the transmitter, receiver, transmitting tube, and receiving tube should be lower than the height of the tableware to be heated.

[0152] The technical solution of this application and how the technical solution of this application solves the above technical problems will be described in detail below with specific embodiments. These specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will be described below in conjunction with the drawings.

[0153] Figure 9 Schematic diagram of the flow of the heating method provided for this application, as Figure 9 shown, the heating method includes:

[0154] S101. When the power is turned on and the safety monitoring function is enabled, send a non-level signal to the target area and receive the reflection signal of the target area; the non-level signal includes ultrasonic signals and / or infrared signals.

[0155] Specifically, the above step S101 can be implemented by the signal processing circuit 101 in the heating circuit 100.

[0156] S102. Generate a corresponding first-level signal according to the reflection signal; the reflection signal includes an echo signal and / or an infrared reflection signal.

[0157] Specifically, the above step S101 can be implemented by the switch 102 in the heating circuit 100.

[0158] S103. When receiving the first-level signal corresponding to the echo signal and / or receiving the first-level signal corresponding to the infrared reflection signal, send a first voltage signal to the target area to heat the target area.

[0159] Specifically, the above step S101 can be implemented by the control circuit 103 in the heating circuit 100.

[0160] In one implementation, when the power is turned on and the safety monitoring function is enabled, send a non-level signal to the target area and receive the reflection signal of the target area, including:

[0161] When the power is turned on and the ultrasonic monitoring function is enabled, send an ultrasonic signal to the target area and receive the echo signal of the target area.

[0162] Specifically, the above step can be implemented by the ultrasonic signal processing circuit 1011 in the heating circuit 100.

[0163] In one implementation, generating a corresponding first-level signal according to the reflection signal includes:

[0164] Convert the echo signal into the first-level signal.

[0165] Specifically, the above step can be implemented by the switch circuit 102 in the heating circuit 100.

[0166] In one implementation, when the power is turned on and the safety monitoring function is enabled, send a non-level signal to the target area and receive the reflection signal of the target area, including:

[0167] When the power is turned on and the ultrasonic monitoring function is enabled, send the ultrasonic signal to the target area and generate a start instruction;

[0168] When receiving the echo signal of the target area, generate an end instruction.

[0169] Specifically, the above step can be implemented by the transmitter 10111 and the receiver 10112 in the heating circuit 100.

[0170] In one implementation, converting the echo signal into the first-level signal includes:

[0171] Start timing when the start instruction is received;

[0172] Stop timing when the end instruction is received to obtain the timing duration;

[0173] Determine the signal transmission distance according to the timing duration;

[0174] When the signal transmission distance is greater than the first threshold and less than or equal to the second threshold, convert the echo signal into the first level signal; the first threshold is less than the second threshold.

[0175] Specifically, the above steps can be implemented by the transmitter 10111, receiver 10112, and signal processor 1021 in the heating circuit 100.

[0176] In one implementation, when the power is turned on and the safety monitoring function is enabled, a non-level signal is transmitted to the target area, and the reflected signal of the target area is received, including:

[0177] When the power is turned on and the infrared monitoring function is enabled, transmit the infrared signal to the target area and receive the infrared reflected signal of the target area.

[0178] Specifically, the above steps can be implemented by the infrared signal processing circuit 1012 in the heating circuit 100.

[0179] In one implementation, when the power is turned on and the infrared monitoring function is enabled, transmit the infrared signal to the target area and receive the infrared reflected signal of the target area, including:

[0180] When the heating circuit is powered on and the infrared monitoring function is enabled, send the infrared signal to the target area;

[0181] Generate a second voltage signal based on the infrared reflected signal;

[0182] Specifically, the above steps can be implemented by the transmitting tube 10121 and receiving tube 10122 in the heating circuit 100.

[0183] In one implementation, generating a corresponding first level signal according to the reflected signal includes:

[0184] Generate the first level signal based on the second voltage signal.

[0185] Specifically, the above steps can be implemented by the operational amplifier 1022 in the heating circuit 100.

[0186] In one implementation, the method further includes:

[0187] Generate a second level signal when the second voltage signal is not received;

[0188] Based on the second level signal, stop sending the first voltage signal to the target area.

[0189] Specifically, the above steps can be implemented by the operational amplifier 1022 and the control circuit 103 in the heating circuit 100.

[0190] The heating method provided by the embodiments of the present application can, when the heating circuit is powered on and the safety monitoring function is enabled, transmit a non-level signal corresponding to the safety monitoring function to the target area through the signal processing circuit, determine that there is tableware in the target area when the reflected signal of the target area is collected, and generate a first level signal, so as to heat the tableware on the target area through the control circuit, improving the detection accuracy of the tableware in the target area.

[0191] Figure 10 It is a schematic structural diagram of the cooking device 200 provided by the present application.

[0192] As Figure 10 shown, the cooking device 200 provided in this embodiment includes: at least one processor 201, a memory 202, a transmitter 203, a receiver 204, a transmitting tube 205, and a receiving tube 206.

[0193] Among them, the processor 201, the memory 202, the transmitter 203, the receiver 204, the transmitting tube 205, and the receiving tube 206 are connected through a bus 204.

[0194] In the specific implementation process, at least one processor 201 executes the computer execution instructions stored in the memory 202, so that at least one processor 201 executes the above method.

[0195] For the specific implementation process of the processor 201, reference can be made to the above method embodiments, and their implementation principles and technical effects are similar, which will not be elaborated here in this embodiment.

[0196] In the above embodiments, it should be understood that the processor can be a central processing unit (Central Processing Unit, CPU), or other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in combination with the invention can be directly implemented by the execution of the hardware processor, or can be implemented by the combination of the hardware and software modules in the processor.

[0197] The memory may include a random access memory (RAM), and may also include a non-volatile memory (NVM), such as at least one disk memory.

[0198] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the buses in the drawings of this application are not limited to only one bus or one type of bus.

[0199] This application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0200] This application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When the processor executes the computer-executable instructions, the above method is implemented.

[0201] The above-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic memory, a flash memory, a magnetic disk, or an optical disc. The readable storage medium can be any available medium accessible by a general-purpose or special-purpose computer.

[0202] An exemplary readable storage medium is coupled to the processor, so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist as discrete components in a device.

[0203] The division of units is merely a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the couplings or direct couplings or communication connections shown or discussed among each other can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0204] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place, or can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0205] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0206] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present invention. And the aforementioned storage medium includes: USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks and other various media that can store program codes.

[0207] Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When this program is executed, it executes the steps including the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disks or optical disks and other various media that can store program codes.

[0208] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include known common knowledge or conventional technical means in the technical field not disclosed in the present invention. It is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A heating circuit, characterized in that, The heating circuit includes a signal processing circuit, a switching circuit, and a control circuit. The signal processing circuit is connected to the switching circuit, and the switching circuit is connected to the control circuit; The signal processing circuit is configured to conduct when the heating circuit is powered on and the safety monitoring function is enabled, emit a non-level signal to a target area, receive the reflected signal from the target area, and send it to the switching circuit; the non-level signal includes an ultrasonic signal and / or an infrared signal; The switching circuit is configured to conduct when receiving the reflected signal, generate a first-level signal according to the reflected signal, and send the first-level signal to the first pin and / or the second pin of the control circuit; the reflected signal includes an echo signal and / or an infrared reflection signal; The control circuit is configured to send a first voltage signal to the target area to heat the target area when the first pin receives the first-level signal and / or the second pin receives the first-level signal.

2. The heating circuit according to claim 1, characterized in that, The safety monitoring function includes an ultrasonic monitoring function; the signal processing circuit includes an ultrasonic signal processing circuit; the ultrasonic signal processing circuit is connected to the switching circuit; The ultrasonic signal processing circuit is configured to conduct when the heating circuit is powered on and the ultrasonic monitoring function is enabled, emit an ultrasonic signal to a target area, receive the echo signal, and send it to the switching circuit.

3. The heating circuit according to claim 2, wherein The ultrasonic signal processing circuit includes a transmitter and a receiver, the switching circuit includes a signal processor, the transmitter and the receiver are both connected to the signal processor, and the signal processor is connected to the first pin of the control circuit; The transmitter is configured to send the ultrasonic signal to the target area when the heating circuit is powered on and the ultrasonic monitoring function is enabled; The receiver is configured to send the echo signal to the signal processor when receiving the echo signal from the target area; The signal processor is configured to convert the echo signal into the first-level signal when receiving the echo signal, and send the first-level signal to the first pin of the control circuit.

4. The heating circuit according to claim 3, characterized in that, The ultrasonic signal processing circuit further includes a timer, and the timer is connected to the transmitter, the receiver, and the signal processor; The transmitter is further configured to generate a start instruction and send it to the timer when sending the ultrasonic signal; The receiver is further configured to generate an end instruction and send it to the timer when receiving the echo signal; The timer is configured to start timing when receiving the start instruction, and stop timing when receiving the end instruction, obtain the timing duration, and send it to the signal processor; The signal processor is configured to determine the signal transmission distance according to the timing duration, convert the echo signal into the first-level signal when the signal transmission distance is greater than a first threshold and less than or equal to a second threshold, and send the first-level signal to the first pin of the control circuit; the first threshold is less than the second threshold.

5. The heating circuit according to claim 1, wherein The safety detection function includes an infrared detection function, and the signal processing circuit includes an infrared signal processing circuit; the infrared signal processing circuit is connected to the switch circuit; The infrared signal processing circuit is configured to conduct when the heating circuit is powered on and the infrared monitoring function is enabled, emit an infrared signal to a target area, receive the infrared reflection signal, and send it to the switch circuit.

6. The heating circuit according to claim 5, wherein The infrared signal processing circuit includes a transmitting tube and a receiving tube, and the switch circuit includes an operational amplifier; the transmitting tube is connected to the first pin of the operational amplifier, the receiving tube is connected to the second pin of the operational amplifier, and the first pin of the operational amplifier is also connected to the second pin of the control circuit; The transmitting tube is configured to conduct when the heating circuit is powered on and the infrared monitoring function is enabled, and send the infrared signal to the target area; The receiving tube is configured to send a second voltage signal to the operational amplifier when receiving the infrared reflection signal from the target area; The operational amplifier is configured to generate the first level signal based on the second voltage signal when receiving the second voltage signal, and send the first level signal to the second pin of the control circuit.

7. The heating circuit according to claim 6, wherein The operational amplifier is further configured to generate a second level signal when not receiving the second voltage signal, and send the second level signal to the control circuit; The control circuit is further configured to stop sending the first voltage signal to the target area based on the second level signal when receiving the second level signal.

8. A heating method, characterized in that, Applied to the heating circuit according to any one of claims 1 to 7, the method includes: When the power is turned on and the safety monitoring function is enabled, emit a non-level signal to the target area and receive the reflection signal of the target area; the non-level signal includes an ultrasonic signal and / or an infrared signal; Generate a corresponding first level signal according to the reflection signal; the reflection signal includes an echo signal and / or an infrared reflection signal; When receiving the first level signal corresponding to the echo signal and / or receiving the first level signal corresponding to the infrared reflection signal, send a first voltage signal to the target area to heat the target area.

9. A cooking device, characterized in that, Includes: A transmitter, a receiver, a transmitting tube, a receiving tube, a memory, a processor, and the heating circuit according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, A computer program is stored in the computer-readable storage medium, and when the computer program is executed by the processor, it is used to implement the method according to claim 8.

11. A computer program product, characterized in that, The computer program product includes a computer program, and when the computer program is executed by the processor, it implements the method according to claim 8.

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