Method and device for controlling refrigerator, refrigerator and computer readable storage medium

Abstract

The invention relates to the technical field of intelligent household appliances, and discloses a method for controlling a refrigerator, and the refrigerator comprises a radar module which is used for transmitting a radio frequency signal and detecting an echo signal to realize gesture recognition; the method comprises the following steps: under the condition that a radar module is awakened, controlling the transmitting frequency of the radar module to be the highest frequency; and adjusting the transmitting frequency of the radar module according to the echo loss of the echo signal so as to realize impedance matching. According to the method, the transmitting antenna of the fully embedded refrigerator radar module in the related technology is matched with the impedance of the radar chip, and the power consumption of the radar module is reduced. The invention further discloses a device for controlling the refrigerator, the refrigerator and a computer readable storage medium.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, for example, to a method and device for controlling a refrigerator, a refrigerator, and a computer-readable storage medium. Background Art

[0002] At present, in order to realize the home integration function, the current fully embedded refrigerators attach the cabinet door panels to the refrigerator door to realize the integration of the refrigerator and cabinet. At the same time, due to the heavy refrigerator door and the negative pressure inside the refrigerator, it will be difficult to open the door. To overcome this pain point, automatic door openers or power-assisted door openers are added to the refrigerator. In order to trigger these devices, triggers need to be added. Due to the obstruction of the door panel, the sensitivity of the refrigerator door triggering method will be reduced or even fail.

[0003] The related technology discloses a method for controlling a refrigerator, characterized in that the refrigerator includes a first radar module and a second radar module, both of which are used to transmit radio frequency signals and detect echo signals, and are arranged vertically on the refrigerator door. The method includes: when the first radar module and / or the second radar module is awakened, updating P according to P and Prl until P meets the detection condition; controlling the transmission power of the first radar and the second radar to be P to transmit the radio frequency signal; timing from the moment the first radar module is triggered to the moment the second radar module is triggered to obtain the triggering duration; when the triggering duration is within the first duration interval, controlling the refrigerator to perform a door opening action; wherein P is the transmission power of the radar module, and Prl is the echo power of the radar module.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] In order to ensure that the actual output power of the radar module is constant, the related technology adopts a power compensation method, that is, echo detection is used to ensure that the actual power input to the antenna remains constant. However, increasing the transmission power will increase the power consumption of the radar module itself. At the same time, due to the impedance change of the output port of the amplifier inside the radar module chip, the efficiency of the amplifier does not work at the best state, which will further increase the power consumption of the module. Therefore, the transmitting antenna of the fully embedded refrigerator radar module in the related technology does not match the impedance of the radar chip, and the power consumption of the radar module is high.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a method and device for controlling a refrigerator, a refrigerator, and a computer-readable storage medium, so as to match the impedance of the transmitting antenna of the fully embedded refrigerator radar module of the related art with the radar chip, thereby reducing the power consumption of the radar module.

[0009] In some embodiments, the refrigerator includes a radar module for transmitting radio frequency signals and detecting echo signals to achieve gesture recognition; the method includes: when the radar module is awakened, controlling the transmission frequency of the radar module to be the highest frequency; adjusting the transmission frequency of the radar module according to the echo loss of the echo signal to achieve impedance matching.

[0010] In some embodiments, the device includes a processor and a memory storing program instructions, and the processor is configured to execute the method for controlling a refrigerator when running the program instructions.

[0011] In some embodiments, the refrigerator includes: a refrigerator body, including: a radar module for transmitting radio frequency signals and detecting echo signals to realize gesture recognition; and the device for controlling the refrigerator is installed on the refrigerator body.

[0012] In some embodiments, the computer-readable storage medium stores program instructions, and when the program instructions are executed, the computer executes the method for controlling the refrigerator.

[0013] The method and device for controlling a refrigerator, the refrigerator, and the computer-readable storage medium provided by the embodiments of the present disclosure can achieve the following technical effects:

[0014] When the fully embedded refrigerator is hung with a door panel, it is equivalent to adding a layer of dielectric to the transmitting antenna. The transmitting antenna is a resonant device. Adding a dielectric means increasing the dielectric constant of the capacitor or inductor, which will cause the antenna resonant frequency to shift to a low frequency. At this time, if the radar module is awakened, the radar module's transmitting frequency is first set to the highest frequency, and then the radar module's transmitting frequency is adjusted based on the highest frequency according to the echo loss of the echo signal to achieve impedance matching, so that the transmitting antenna of the fully embedded refrigerator radar module matches the impedance of the radar chip. Impedance matching adjusts the amplifier's efficiency to the optimal working state, thereby reducing the power consumption of the radar module.

[0015] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0017] Figure 1 is a schematic diagram of the structure of a refrigerator provided by an embodiment of the present disclosure;

[0018] Figure 2 is a schematic diagram of the structure of a radar module of a refrigerator provided by an embodiment of the present disclosure;

[0019] Figure 3 is a schematic diagram of a method for controlling a refrigerator provided by an embodiment of the present disclosure;

[0020] Figure 4 is a schematic diagram of another method for controlling a refrigerator provided by an embodiment of the present disclosure;

[0021] Figure 5 is a schematic diagram of another method for controlling a refrigerator provided by an embodiment of the present disclosure;

[0022] Figure 6 is a schematic diagram of a device for controlling a refrigerator provided by an embodiment of the present disclosure;

[0023] Figure 7 It is a schematic diagram of a refrigerator provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0024] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0025] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0026] Unless otherwise stated, the term "plurality" means two or more.

[0027] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0028] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0029] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0030] In the embodiments of the present disclosure, smart home appliances refer to home appliance products that are formed by introducing microprocessors, sensor technology, and network communication technology into home appliance equipment. They have the characteristics of intelligent control, intelligent perception, and intelligent application. The operation process of smart home appliances often relies on the application and processing of modern technologies such as the Internet of Things, the Internet, and electronic chips. For example, smart home appliances can be connected to electronic devices to enable users to remotely control and manage smart home appliances.

[0031] In the disclosed embodiments, the terminal device refers to an electronic device with a wireless connection function. The terminal device can communicate with the above-mentioned smart home appliances by connecting to the Internet, or can communicate with the above-mentioned smart home appliances directly through Bluetooth, Wi-Fi, etc. In some embodiments, the terminal device is, for example, a mobile device, a computer, or a vehicle-mounted device built into a hover car, or any combination thereof. Mobile devices may include, for example, mobile phones, smart home devices, wearable devices, smart mobile devices, virtual reality devices, etc., or any combination thereof, wherein wearable devices include, for example, smart watches, smart bracelets, pedometers, etc.

[0032] Combination Figure 1 and Figure 2 As shown, an embodiment of the present disclosure provides a refrigerator, including: a radar module. The radar module is used to transmit radio frequency signals and detect echo signals to realize gesture recognition.

[0033] The refrigerator provided by the embodiment of the present disclosure is a fully embedded refrigerator that uses a radar module as a gesture recognition module. Compared with infrared and other technologies, it can better penetrate the hanging plate 3 of the refrigerator door and improve the sensitivity of gesture recognition.

[0034] Optionally, there are two radar modules, including a first radar module 1 and a second radar module 2. The first radar module 1 and the second radar module 2 have the same structure, are both used to transmit radio frequency signals and detect echo signals, and realize gesture recognition, and are arranged vertically on the refrigerator door 3.

[0035] In this way, two radar modules with the same structure are provided and arranged vertically on the refrigerator door 3, which increases the sensitivity during gesture recognition, reduces the misrecognition rate, and improves the accuracy of gesture recognition.

[0036] Optionally, the radar module includes: a microprocessor 4, a radar chip 5, a transmitting antenna 6, a receiving antenna 7, a forward detection mechanism 8, a forward microstrip coupler 9, a reverse microstrip coupler 10 and a reverse detection mechanism 11. The radar chip 5 is electrically connected to the microprocessor 4. The transmitting antenna 6 is electrically connected to the radar chip 5 and is used to transmit a radio frequency signal. The receiving antenna 7 is electrically connected to the radar chip 5 and is used to receive a trigger signal. The forward detection mechanism 8 is electrically connected to the microprocessor 4. The forward microstrip coupler 9 is electrically connected to the forward detection mechanism 8 at one end and is adjacent to the transmitting antenna 6, and is used to forward couple the echo signal of the radar module and transmit it into the forward detection mechanism 8, so that the forward detection mechanism 8 detects the forward echo power of the radar module. The reverse detection mechanism 10 is electrically connected to the microprocessor 4. The reverse microstrip coupler 11 has one end electrically connected to the reverse detection mechanism 10 and is adjacent to the transmitting antenna 6, and is used to reversely couple the echo signal of the radar module and transmit it into the reverse detection mechanism 10, so that the reverse detection mechanism 10 detects the reverse echo power of the radar module.

[0037] Specifically, the coupling degrees of the forward microstrip coupler 9 and the reverse microstrip coupler 11 are both 10 dB.

[0038] This is helpful for detecting the forward echo power and the reverse echo power of the radar module.

[0039] Optionally, the radar module further includes: a first load resistor 12 and a second load resistor 13. The first load resistor 12 is connected to the other end of the forward microstrip coupler 9. The second load resistor 13 is connected to the other end of the reverse microstrip coupler 11.

[0040] Optionally, the forward detection mechanism 8 includes: a first detection tube, a first filter capacitor and a first operational amplifier. The first detection tube is electrically connected to the forward microstrip coupler 9. One end of the first filter capacitor is electrically connected to the first detection tube. One end of the first operational amplifier is electrically connected to the other end of the first filter capacitor, and the other end is electrically connected to the analog-to-digital conversion pin of the microprocessor 4.

[0041] This is helpful to obtain more accurate forward echo power from the echo signal of the radar module that is forward coupled out.

[0042] Optionally, the reverse detection mechanism 10 includes: a second detection tube, a second filter capacitor and a second operational amplifier. The second detection tube is electrically connected to the reverse microstrip coupler 11. One end of the second filter capacitor is electrically connected to the second detection tube. One end of the second operational amplifier is electrically connected to the other end of the second filter capacitor, and the other end is electrically connected to the analog-to-digital conversion pin of the microprocessor 4.

[0043] This is helpful to obtain more accurate reverse echo power from the echo signal of the radar module that is reversely coupled out.

[0044] The refrigerator provided by the embodiment of the present disclosure is a fully embedded refrigerator that uses a radar module as a gesture recognition module. Compared with infrared and other technologies, it can better penetrate the hanging plate 3 of the refrigerator door and improve the sensitivity of gesture recognition.

[0045] Combination Figure 3 As shown, the embodiment of the present disclosure provides a method for controlling a refrigerator, comprising:

[0046] S301, when the radar module is awakened, the refrigerator controls the transmission frequency of the radar module to be the highest frequency.

[0047] S302, the refrigerator adjusts the transmission frequency of the radar module according to the echo loss of the echo signal to achieve impedance matching.

[0048] Using the method for controlling a refrigerator provided by the embodiment of the present disclosure, when the fully embedded refrigerator is hung with a door panel, it is equivalent to adding a layer of dielectric to the transmitting antenna. The transmitting antenna is a resonant device, and adding a dielectric means increasing the dielectric constant of the capacitor or inductor, which will cause the antenna resonant frequency to shift to a low frequency. At this time, if the radar module is awakened, the transmitting frequency of the radar module is first set to the highest frequency, and then the transmitting frequency of the radar module is adjusted based on the highest frequency according to the echo loss of the echo signal to achieve impedance matching, so that the transmitting antenna of the fully embedded refrigerator radar module is impedance matched with the radar chip. Impedance matching adjusts the efficiency of the amplifier to the optimal working state, thereby reducing the power consumption of the radar module.

[0049] Optionally, the radar module is awakened, including: the first radar module and / or the second radar module is awakened. Specifically, the first radar module and / or the second radar module is awakened, including: when the distance between the user and the radar module is less than the distance threshold, the refrigerator wakes up the first radar module and the second radar module. More specifically, the value of the distance threshold can be 10cm. In this way, the refrigerator wakes up the radar module only when the distance between the user and the radar module is less than the distance threshold. Avoid the problem of the radar module being mistakenly awakened when the user only occasionally passes by the refrigerator, improve the accuracy of recognition, and reduce energy consumption.

[0050] Optionally, the transmission frequency range of the radar module includes a frequency band of 5.8 GHz and a frequency band of 24 GHz. Specifically, the value range of the frequency band of 5.8 GHz includes [5.725 GHz, 5.875 GHz]. The value range of the frequency band of 24 GHz includes [24 GHz, 24.25 GHz]. In this way, in the frequency band of 5.8 GHz and the frequency band of 24 GHz, the transmission frequency of the radar module is adjusted according to the echo loss of the echo signal to achieve impedance matching, so that the antenna and chip of the fully embedded refrigerator radar module achieve impedance matching in the frequency band of 5.8 GHz and the frequency band of 24 GHz. The efficiency of the amplifier is adjusted to the optimal working state through impedance matching, thereby reducing the power consumption of the radar module.

[0051] Optionally, the refrigerator adjusts the transmission frequency of the radar module according to the return loss of the echo signal to achieve impedance matching, including: the refrigerator determines the return loss of the echo signal. The refrigerator adjusts the transmission frequency of the radar module according to the return loss and the loss threshold to achieve impedance matching.

[0052] In this way, the transmit frequency of the radar module is adjusted according to the echo loss and loss threshold of the echo signal to achieve impedance matching, so that the transmit antenna of the fully embedded refrigerator radar module matches the impedance of the radar chip. The efficiency of the amplifier is adjusted to the optimal working state through impedance matching, thereby reducing the power consumption of the radar module.

[0053] Optionally, the refrigerator adjusts the transmission frequency of the radar module according to the return loss and the loss threshold of the echo signal to achieve impedance matching, including: when the return loss is less than the loss threshold, the refrigerator controls the radar module to maintain the initial transmission frequency. Or, when the return loss is greater than or equal to the loss threshold, the refrigerator controls the radar module to reduce the transmission frequency until the return loss meets the optimal matching condition.

[0054] Specifically, the value of the loss threshold may be -8 dB (decibel).

[0055] In this way, if the return loss is small and less than the loss threshold, it means that the transmit antenna of the fully embedded refrigerator radar module matches the impedance of the radar chip, and there is no need to adjust the transmit frequency of the radar module. If the return loss is large and greater than or equal to the loss threshold, it means that the transmit antenna of the fully embedded refrigerator radar module does not match the impedance of the radar chip, and the return loss is large. The radar module needs to reduce the transmit frequency so that the return loss meets the optimal matching condition to achieve impedance matching. This is conducive to more accurate impedance matching between the transmit antenna of the fully embedded refrigerator radar module and the radar chip, thereby reducing the power consumption of the radar module.

[0056] Optionally, the refrigerator controls the radar module to reduce the transmission frequency until the return loss meets the best matching condition, including: the refrigerator controls the radar module to modulate the frequency to a frequency interval lower than the initial transmission frequency with a first frequency modulation step. When the return loss is less than the sum of the loss threshold and the first loss difference, the refrigerator determines that the current transmission frequency is an intermediate matching frequency. The refrigerator controls the radar module to modulate the frequency in the intermediate matching frequency interval with a second frequency modulation step until the return loss meets the best matching condition. The intermediate matching frequency interval is determined based on the intermediate matching frequency, and the first frequency modulation step is greater than the second frequency modulation step.

[0057] Specifically, the value of the first frequency modulation step may be 10 MHz, the value of the second frequency modulation step may be 1 MHz, and the value of the first loss difference may be 3 dB.

[0058] In this way, the transmitting frequency is first lowered with a larger first frequency modulation step, which is conducive to more quickly locating the middle matching frequency interval, and then the transmitting frequency is adjusted with a smaller second frequency modulation step, which is conducive to more accurately searching for the transmitting frequency that matches the impedance of the transmitting antenna of the fully embedded refrigerator radar module with the radar chip, thereby reducing the power consumption of the radar module more quickly.

[0059] Optionally, the refrigerator generates an intermediate matching frequency interval according to the intermediate matching frequency, including: the refrigerator determines that the starting point of the intermediate matching frequency interval is the difference between the intermediate matching frequency and the frequency difference, and the end point of the interval is the sum of the intermediate matching frequency and the frequency difference.

[0060] Specifically, the frequency difference may be set to 10 MHz.

[0061] In this way, it is helpful to better generate the intermediate matching frequency interval according to the intermediate matching frequency, thereby helping to more accurately search for the transmitting frequency that matches the impedance of the transmitting antenna of the fully embedded refrigerator radar module with the radar chip, thereby reducing the power consumption of the radar module.

[0062] Optionally, the echo return loss satisfies the best matching condition, including: the current echo return loss is less than or equal to a loss threshold, and the current echo return loss is greater than a previous echo return loss.

[0063] In this way, the current return loss is small and less than or equal to the loss threshold, and is larger than the previous return loss, which means that the transmit antenna of the fully embedded refrigerator radar module matches the radar chip impedance, and there is no need to further adjust the transmit frequency of the radar module. Transmitting RF signals at the current transmit frequency is conducive to reducing the power consumption of the radar module.

[0064] Optionally, the refrigerator determines the return loss of the echo signal, including: the refrigerator determines the return loss of the echo signal according to the forward echo power and the reverse echo power of the radar module.

[0065] In this way, the forward echo power and reverse echo power of the radar module determine the echo loss of the echo signal, which is more accurate than the single echo power detection, so that the transmit antenna of the fully embedded refrigerator radar module and the radar chip impedance are more matched, thereby reducing the power consumption of the radar module.

[0066] Optionally, the refrigerator determines the return loss of the return signal according to the forward return power and the reverse return power of the radar module, including: the refrigerator calculates S 11 =log(P1 / P2). Where, S 11 is the echo loss of the echo signal, P1 is the forward echo power of the radar module, and P2 is the reverse echo power of the radar module.

[0067] In this way, the forward echo power and reverse echo power of the radar module determine the echo loss of the echo signal, which is more accurate than the single echo power detection, so that the transmit antenna of the fully embedded refrigerator radar module and the radar chip impedance are more matched, thereby reducing the power consumption of the radar module.

[0068] Optionally, the method for determining the forward echo power of the radar module includes: the refrigerator controls the forward microstrip coupler to forward couple the echo signal reflected from the transmitting antenna to obtain the forward echo signal of the radar module. The refrigerator controls the forward microstrip coupler to transmit the forward echo signal of the radar module to the forward detection mechanism. The refrigerator controls the forward detection mechanism to detect the power of the forward echo signal of the radar module to obtain the forward echo power of the radar module.

[0069] In this way, the echo signal reflected from the transmitting antenna is forward coupled out through the forward microstrip coupler and then input into the forward detection mechanism, which is conducive to more accurate detection of the forward echo power.

[0070] Optionally, the refrigerator controls the forward detection mechanism to detect the power of the forward echo signal of the radar module to obtain the forward echo power of the radar module, including: the refrigerator controls the first detection tube to filter out the negative half-cycle voltage of the forward echo signal of the radar module to obtain the first negative pressure echo elimination signal. The refrigerator controls the first filter capacitor to convert the first negative pressure echo elimination signal into a first DC voltage signal. The refrigerator controls the first operational amplifier to amplify the first DC voltage signal to obtain the first amplified DC voltage signal. The refrigerator controls the first operational amplifier to send the first amplified DC voltage signal to the digital-to-analog conversion pin of the microprocessor. The refrigerator controls the microprocessor to use the first amplified DC voltage signal to obtain the forward echo power of the radar module.

[0071] In this way, the echo signal coupled out in the forward direction is first subjected to negative pressure elimination, then filtered to become a DC voltage signal, which is then amplified and the forward echo power is obtained through analog-to-digital conversion, which is conducive to more accurate detection of the forward echo power.

[0072] Optionally, the reverse echo power of the radar module is determined by: the refrigerator controls the reverse microstrip coupler to reversely couple the echo signal reflected from the transmitting antenna to obtain the reverse echo signal of the radar module. The refrigerator controls the reverse microstrip coupler to transmit the reverse echo signal of the radar module to the reverse detection mechanism. The refrigerator controls the reverse detection mechanism to detect the power of the reverse echo signal of the radar module to obtain the reverse echo power of the radar module.

[0073] In this way, the echo signal reflected from the transmitting antenna is reversely coupled out through the reverse microstrip coupler and then input into the reverse detection mechanism, which is conducive to more accurate detection of the reverse echo power.

[0074] Optionally, the refrigerator controls the reverse detection mechanism to detect the power of the reverse echo signal of the radar module to obtain the reverse echo power of the radar module, including:

[0075] The refrigerator controls the second detector tube to filter out the negative half-cycle voltage of the reverse echo signal of the radar module to obtain a second negative pressure echo cancellation signal. The refrigerator controls the second filter capacitor to convert the second negative pressure echo cancellation signal into a second DC voltage signal. The refrigerator controls the second operational amplifier to amplify the second DC voltage signal to obtain a second amplified DC voltage signal. The refrigerator controls the second operational amplifier to send the second amplified DC voltage signal to the digital-to-analog conversion pin of the microprocessor. The refrigerator controls the microprocessor to obtain the reverse echo power of the radar module using the second amplified DC voltage signal.

[0076] In this way, the negative pressure of the reverse coupled echo signal is first eliminated, and then filtered to become a DC voltage signal, which is then amplified and the reverse echo power is obtained through analog-to-digital conversion, which is conducive to more accurate detection of the reverse echo power.

[0077] Combination Figure 4 As shown, the embodiment of the present disclosure provides another method for controlling a refrigerator, comprising:

[0078] S401, when the radar module is awakened, the refrigerator controls the transmission frequency of the radar module to be the highest frequency.

[0079] S402: The refrigerator determines a return loss of the echo signal.

[0080] S403, when the echo loss is less than the loss threshold, the refrigerator controls the radar module to maintain the initial transmission frequency. Or,

[0081] S404, when the echo loss is greater than or equal to the loss threshold, the refrigerator controls the radar module to reduce the transmission frequency until the echo loss meets the optimal matching condition.

[0082] Using the method for controlling a refrigerator provided by an embodiment of the present disclosure, when a door panel is hung on a fully embedded refrigerator, it is equivalent to adding a layer of dielectric to the transmitting antenna. The transmitting antenna is a resonant device. Adding a dielectric means increasing the dielectric constant of the capacitor or inductor, which will cause the antenna resonant frequency to shift to a low frequency. At this time, if the radar module is awakened, the transmitting frequency of the radar module is first set to the highest frequency, and then the relationship between the return loss and the loss threshold is determined. If the return loss is small and less than the loss threshold, it means that the transmit antenna of the fully embedded refrigerator radar module is impedance matched with the radar chip, and there is no need to adjust the transmit frequency of the radar module. If the return loss is large and greater than or equal to the loss threshold, it means that the transmit antenna of the fully embedded refrigerator radar module is impedance mismatched with the radar chip, and the return loss is large. The radar module needs to reduce the transmit frequency so that the return loss meets the optimal matching condition to achieve impedance matching. This is conducive to more accurately achieving impedance matching between the transmit antenna of the fully embedded refrigerator radar module and the radar chip, thereby reducing the power consumption of the radar module.

[0083] Combination Figure 5 As shown, the embodiment of the present disclosure provides another method for controlling a refrigerator, comprising:

[0084] S501, when the radar module is awakened, the refrigerator controls the transmission frequency of the radar module to be the highest frequency.

[0085] S502: The refrigerator determines a return loss of the echo signal.

[0086] S503, when the echo loss is less than the loss threshold, the refrigerator controls the radar module to maintain the initial transmission frequency. Or,

[0087] S504: When the echo loss is greater than or equal to the loss threshold, the refrigerator controls the radar module to modulate the frequency in a first frequency modulation step toward a frequency interval lower than the initial transmission frequency.

[0088] S505: When the echo return loss is less than the sum of the loss threshold and the first loss difference, the refrigerator determines that the current transmitting frequency is the middle matching frequency.

[0089] S506, the refrigerator control radar module modulates the frequency in the middle matching frequency interval with a second frequency modulation step until the return loss meets the optimal matching condition.

[0090] The intermediate matching frequency interval is determined according to the intermediate matching frequency, and the first frequency modulation step is greater than the second frequency modulation step.

[0091] Using the method for controlling a refrigerator provided by the embodiment of the present disclosure, when the fully embedded refrigerator is hung with a door panel, it is equivalent to adding a layer of dielectric to the transmitting antenna. The transmitting antenna is a resonant device. Adding a dielectric means increasing the dielectric constant of the capacitor or inductor, which will cause the antenna resonant frequency to shift to a low frequency. At this time, if the radar module is awakened, the transmitting frequency of the radar module is first set to the highest frequency, and then the magnitude relationship between the return loss and the loss threshold is determined. If the return loss is small and less than the loss threshold, it means that the transmit antenna of the fully embedded refrigerator radar module is impedance matched with the radar chip, and there is no need to adjust the transmit frequency of the radar module. If the return loss is large and greater than or equal to the loss threshold, it means that the transmit antenna of the fully embedded refrigerator radar module is not impedance matched with the radar chip, and the return loss is large. The radar module needs to reduce the transmit frequency so that the return loss meets the optimal matching condition to achieve impedance matching. First, the transmit frequency is reduced with a larger first frequency modulation step, which is conducive to more rapid positioning of the intermediate matching frequency interval, and then the transmit frequency is adjusted with a smaller second frequency modulation step, which is conducive to more accurate search for the transmit frequency that matches the impedance of the transmit antenna of the fully embedded refrigerator radar module with the radar chip. This helps to more accurately and quickly achieve impedance matching between the transmitting antenna and the radar chip of the fully embedded refrigerator radar module, thereby reducing the power consumption of the radar module more quickly.

[0092] Combination Figure 6 As shown, the embodiment of the present disclosure provides a device 200 for controlling a refrigerator, including a processor 600 and a memory 601. Optionally, the device 300 may also include a communication interface 602 and a bus 603. The processor 600, the communication interface 602, and the memory 601 may communicate with each other through the bus 603. The communication interface 602 may be used for information transmission. The processor 600 may call the logic instructions in the memory 601 to execute the method for controlling a refrigerator of the above embodiment.

[0093] In addition, the logic instructions in the memory 601 described above can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0094] The memory 601 is a computer-readable storage medium that can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 600 executes the function application and data processing by running the program instructions / modules stored in the memory 601, that is, the method for controlling the refrigerator in the above embodiment is implemented.

[0095] The memory 601 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 601 may include a high-speed random access memory and may also include a non-volatile memory.

[0096] Combination Figure 7 As shown, the embodiment of the present disclosure provides a refrigerator 100, including: a refrigerator body, and the above-mentioned device 200 for controlling the refrigerator. The device 200 for controlling the refrigerator is installed on the refrigerator body. The installation relationship described here is not limited to placement inside the refrigerator body, but also includes installation connections with other components of the refrigerator 100, including but not limited to physical connections, electrical connections or signal transmission connections, etc. Those skilled in the art can understand that the device 200 for controlling the refrigerator can be adapted to a feasible refrigerator body, thereby realizing other feasible embodiments.

[0097] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for controlling a refrigerator.

[0098] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes.

[0099] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0100] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0101] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0102] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling a refrigerator, characterized in that: The refrigerator includes a radar module for transmitting a radio frequency signal and detecting an echo signal to realize gesture recognition; the method includes: When the radar module is awakened, the transmission frequency of the radar module is controlled to be the highest frequency; The transmitting frequency of the radar module is adjusted according to the return loss of the echo signal to achieve impedance matching.

2. The method according to claim 1, characterized in that The transmission frequency of the radar module is adjusted according to the return loss of the echo signal to achieve impedance matching, including: Determine the return loss of the echo signal; The transmit frequency of the radar module is adjusted according to the return loss and the loss threshold to achieve impedance matching.

3. The method according to claim 2, characterized in that The transmitting frequency of the radar module is adjusted according to the return loss and loss threshold of the echo signal to achieve impedance matching, including: When the echo return loss is less than the loss threshold, the radar module is controlled to maintain the initial transmission frequency; or, When the return loss is greater than or equal to the loss threshold, the radar module is controlled to reduce the transmission frequency until the return loss meets the optimal matching condition.

4. The method according to claim 3, characterized in that Control the radar module to reduce the transmission frequency until the return loss meets the best matching conditions, including: Controlling the radar module to modulate the frequency in a first frequency modulation step toward a frequency interval lower than the initial transmission frequency; When the return loss is less than the sum of the loss threshold and the first loss difference, determining the current transmission frequency to be the intermediate matching frequency; Controlling the radar module to modulate the frequency in the middle matching frequency interval with a second frequency modulation step until the return loss meets the optimal matching condition; The intermediate matching frequency interval is determined according to the intermediate matching frequency, and the first frequency modulation step is greater than the second frequency modulation step.

5. The method according to any one of claims 2 to 4, characterized in that: The radar module includes: a microprocessor; a radar chip electrically connected to the microprocessor; a transmitting antenna electrically connected to the radar chip for transmitting a radio frequency signal; a receiving antenna electrically connected to the radar chip for receiving a trigger signal; a forward detection mechanism electrically connected to the microprocessor; a forward microstrip coupler electrically connected to the forward detection mechanism and adjacent to the transmitting antenna, for forward coupling the echo signal of the radar module and transmitting it into the forward detection mechanism, so that the forward detection mechanism detects the forward echo power of the radar module; a reverse detection mechanism electrically connected to the microprocessor; a reverse microstrip coupler electrically connected to the reverse detection mechanism and adjacent to the transmitting antenna, for reverse coupling the echo signal of the radar module and transmitting it into the reverse detection mechanism, so that the reverse detection mechanism detects the reverse echo power of the radar module; determining the echo loss of the echo signal, including: The return loss of the echo signal is determined according to the forward echo power and the reverse echo power of the radar module.

6. The method according to claim 5, characterized in that The method for determining the forward echo power of the radar module includes: Control the forward microstrip coupler to forward couple the echo signal reflected from the transmitting antenna to obtain the forward echo signal of the radar module; Control the forward microstrip coupler to transmit the forward echo signal of the radar module to the forward detection mechanism; The forward detection mechanism is controlled to detect the power of the forward echo signal of the radar module to obtain the forward echo power of the radar module.

7. The method according to claim 5, characterized in that The method for determining the reverse echo power of the radar module includes: Control the reverse microstrip coupler to reversely couple the echo signal reflected from the transmitting antenna to obtain a reverse echo signal of the radar module; Controlling the reverse microstrip coupler to transmit the reverse echo signal of the radar module to the reverse detection mechanism; The reverse detection mechanism is controlled to detect the power of the reverse echo signal of the radar module to obtain the reverse echo power of the radar module.

8. A device for controlling a refrigerator, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for controlling a refrigerator according to any one of claims 1 to 7 when running the program instructions.

9. A refrigerator, characterized in that: include: The refrigerator body includes: a radar module for transmitting radio frequency signals and detecting echo signals to realize gesture recognition; The device for controlling a refrigerator as claimed in claim 8 is installed on a refrigerator body.

10. A computer-readable storage medium storing program instructions, characterized in that: When the program instructions are executed, the computer is used to execute the method for controlling a refrigerator as described in any one of claims 1 to 7.

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