Over-temperature warning method and device, computer readable storage medium and stove

Abstract

The invention discloses an overtemperature warning method and device, a computer readable storage medium and a kitchen range, and the method comprises the steps: obtaining real-time measurement data, the real-time measurement data is obtained by periodically measuring the temperature of a to-be-measured appliance and the temperature of a user operation region, and the user operation region is located above the to-be-measured appliance; when the duration that the temperature of the to-be-measured appliance exceeds the preset safe cooking temperature reaches the preset overtemperature warning duration, if one or more judgment conditions are met, warning information is not sent out, and otherwise, warning information is sent out. According to the invention, whether a user operates the cooker or not and whether interference of high temperature caused by human factors or not can be detected, so that the false alarm rate is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of temperature control technology, and in particular to an over-temperature warning method and device, a computer-readable storage medium, and a stove. Background Art

[0002] Cooking stoves are often used to heat or cook food, and the temperature of the pot must be continuously monitored during the heating process. For example, in some cases, users may forget to turn off the stove during cooking, leaving the food in the pot to heat for an extended period of time, causing the liquid to boil away, resulting in a dry-burn phenomenon. This continuous dry-burning can burn food and cause waste. In severe cases, it can also cause the pot to overheat, potentially posing a fire hazard.

[0003] In existing temperature measurement methods, a temperature measuring device is usually used to measure the temperature of the device and issue a warning when the temperature exceeds a preset temperature.

[0004] However, the existing judgment mechanism is too simple and cannot rule out interference from high temperatures caused by human factors, such as manually raising the temperature and continuously paying attention to the stove, manually shaking the pan to generate instantaneous high temperatures, etc., resulting in a high false alarm rate and a reduced user experience.

[0005] There is an urgent need for an over-temperature warning method that can detect interference from high temperatures caused by human factors, thereby helping to reduce the false alarm rate. Summary of the Invention

[0006] The technical problem solved by the present invention is to provide an over-temperature warning method and device, a computer-readable storage medium, and a stove, which can detect whether a user is operating the stove and whether high temperature interference is caused by human factors, thereby effectively reducing the false alarm rate.

[0007] To solve the above technical problems, an embodiment of the present invention provides an over-temperature warning method, including: obtaining real-time measurement data, wherein the real-time measurement data is obtained by periodically measuring the temperature of the instrument to be measured and the temperature of the user operation area, and the user operation area is located above the instrument to be measured; when the temperature of the instrument to be measured exceeds the preset cooking safety temperature for a duration that reaches a preset over-temperature warning duration, if one or more of the following is met, no warning message is issued, otherwise a warning message is issued: the quotient of the sum of the absolute values ​​of the temperature differences of the instrument to be measured at two adjacent moments within a first preset duration and the average temperature value of the instrument to be measured within the first preset duration is greater than or equal to a first preset ratio; the quotient of the sum of the absolute values ​​of the temperature differences of the user operation area at two adjacent moments within the first preset duration and the average temperature value of the user operation area within the first preset duration is greater than or equal to a second preset ratio; the average temperature value of the user operation area within the first preset duration is greater than or equal to a preset lower limit of human body temperature.

[0008] Optionally, the first preset duration is less than the over-temperature warning duration and is greater than or equal to 1 / 2 of the over-temperature warning duration.

[0009] Optionally, the first preset ratio is greater than or equal to 1, and / or the second preset ratio is greater than or equal to 1.

[0010] Optionally, the real-time measurement data is obtained by periodically measuring the temperature of the instrument to be measured and the temperature of the user operation area using an infrared thermopile array chip; wherein the infrared thermopile array chip includes an infrared thermopile array device, and a lens located above the infrared thermopile array device, and the lens faces the side of the instrument to be measured and the user operating the instrument to be measured.

[0011] Optionally, the instrument to be measured is placed on an instrument support, and the instrument support is detachably fixed to a substrate; wherein the height difference between the infrared thermopile array chip and the substrate is determined according to the focal angle of the lens and the horizontal distance between the infrared thermopile array chip and the instrument support, so that when the user is operating, the projection area of ​​the lens can simultaneously cover a part of the instrument to be measured and a part of the user.

[0012] Optionally, the height difference between the infrared thermopile array chip and the substrate is determined using the following formula:

[0013] (H U +hd×tanα) <H<(H L +h+d×tanα);

[0014] Wherein, H is used to represent the height difference between the infrared thermopile array chip and the substrate, d is used to represent the horizontal distance between the infrared thermopile array chip and the device support, α is used to represent the focal angle, H U Used to indicate the preset upper limit of the tool height process specification, H L It is used to indicate the preset lower limit value of the tool height process specification, and h is used to indicate the height of the tool support.

[0015] Optionally, the infrared thermopile array includes a first area located above and a second area located below in the vertical direction; wherein, in the user operation state, the first area is used to measure the temperature of the user, and the second area is used to measure the temperature of the device to be measured.

[0016] Optionally, there is a gap between the first area and the second area, and a redundant module is used to fill the gap.

[0017] Optionally, one or more of the following are met: when determining the sum of the absolute values ​​of the temperature differences between two adjacent moments of the user operation area within the first preset time length and the average temperature value of the user operation area within the first preset time length, the real-time measurement data of the infrared contacts in the first horizontal row from the top of the first area are used for calculation; when determining the sum of the absolute values ​​of the temperature differences between two adjacent moments of the instrument to be measured within the first preset time length and the average temperature value of the instrument to be measured within the first preset time length, the real-time measurement data of the infrared contacts in the first horizontal row from the bottom of the second area are used for calculation.

[0018] To solve the above technical problems, an embodiment of the present invention provides an over-temperature warning device, comprising: a data acquisition module, configured to acquire real-time measurement data, the real-time measurement data being obtained by periodically measuring the temperature of an appliance to be measured and the temperature of a user operation area, the user operation area being located above the appliance to be measured; and a warning determination module, configured to, when the temperature of the appliance to be measured exceeds a preset cooking safety temperature for a duration that reaches a preset over-temperature warning duration, not issue a warning message if one or more of the following conditions are met, and otherwise issue a warning message: a quotient of the sum of the absolute values ​​of the temperature differences of the appliance to be measured at two adjacent moments within a first preset duration and an average temperature value of the appliance to be measured within the first preset duration is greater than or equal to a first preset ratio; a quotient of the sum of the absolute values ​​of the temperature differences of the user operation area at two adjacent moments within the first preset duration and an average temperature value of the user operation area within the first preset duration is greater than or equal to a second preset ratio; and the average temperature value of the user operation area within the first preset duration is greater than or equal to a preset lower limit of human body temperature.

[0019] To solve the above technical problems, an embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored. When the computer program is run by a processor, the steps of the above-mentioned over-temperature warning method are executed.

[0020] To solve the above technical problems, an embodiment of the present invention provides a stove, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor executes the steps of the above-mentioned over-temperature warning method when running the computer program.

[0021] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0022] In an embodiment of the present invention, by adopting real-time measurement data obtained by periodically measuring the temperature of the utensil to be measured and the temperature of the user operation area, when the temperature of the utensil to be measured exceeds the preset cooking safety temperature for a duration reaching the preset over-temperature warning duration, three judgment conditions for not issuing a warning message are set, so that it can be judged that the temperature change of the utensil is large, and the user may have flipped the wok and the pan, and the over-temperature warning at this time is likely to cause a false alarm; it can also be judged based on the quotient of the absolute value of the temperature difference of two adjacent moments of the utensil to be measured within the first preset time length and the average temperature value of the utensil to be measured within the first preset time length being greater than or equal to a first preset ratio. If the quotient of the temperature of the user operation area within the first preset time period is greater than or equal to the second preset ratio, it is judged that the temperature change of the user operation area is large, and the user may manually increase the temperature of the appliance to produce an instantaneous high temperature in the user operation area (such as spark jitter, oil point interference, etc. caused by frying operation), or the user may walk in front of the appliance, and an over-temperature warning is likely to cause a false alarm at this time; it can also be judged that the user operation area is supervised by a person based on the average temperature value of the user operation area within the first preset time period being greater than or equal to the preset lower limit of human body temperature, and the user may manually increase the temperature of the appliance to produce a stable high temperature in the user operation area (such as a stable temperature rise caused by steaming operation), and an over-temperature warning is likely to cause a false alarm at this time. By adopting the solution in the embodiment of the present invention, by excluding one or more of the above situations, only in the cases other than these, it is judged as a dry burning situation without supervision, and a warning message is issued, which can effectively reduce the possibility of false alarms and improve user experience.

[0023] Furthermore, the first preset time period is less than the over-temperature warning time period and is greater than or equal to 1 / 2 of the over-temperature warning time period. By adopting the above scheme, through the first preset time period being less than the over-temperature warning time period, only the situation within a certain recent time period can be checked to avoid interference from historical data; through the first preset time period being greater than 1 / 2 of the over-temperature warning time period, it is possible to avoid setting an overly short judgment time, so as to avoid spark jitter and oil spot interference causing misjudgment of someone as someone when there is no one.

[0024] Furthermore, the first preset ratio is greater than or equal to 1, and / or the second preset ratio is greater than or equal to 1. When the above scheme is adopted, since the actual temperature of the appliance is often high and the actual temperature change is often large, the first preset ratio should not be set too small at this time. By setting the first preset ratio to be greater than or equal to 1, the effectiveness of the judgment can be improved; since in situations such as user walking or spark shaking, oil point interference, etc., although the actual temperature is low, the instantaneous change is often large, the second preset ratio should not be set too small. By setting the second preset ratio to be greater than or equal to 1, the effectiveness of the judgment can be improved.

[0025] Furthermore, by using an infrared thermopile array chip to periodically measure the temperature of the instrument to be measured and the temperature of the user operation area to obtain real-time measurement data, compared with the use of point-type temperature measuring devices, array-distributed temperature measurement data can be collected, effectively expanding the temperature measurement range while not requiring fusion processing of real-time measurement data from multiple devices; by setting the lens of the infrared thermopile array chip to face the side of the instrument to be measured and towards the user operating the instrument to be measured, the projection area of ​​the lens can simultaneously cover a part of the instrument and a part of the user in the user operation state, thereby being able to detect whether a user is operating the cooker and whether high temperature interference is caused by human factors, thereby helping to reduce the false alarm rate.

[0026] Furthermore, by having an appropriate height difference between the infrared thermopile array chip and the substrate, the height difference is determined according to the focal angle of the lens and the horizontal distance between the infrared thermopile array chip and the device support, so that a more appropriate height value can be calculated according to actual conditions, thereby effectively realizing the detection of interference conditions by the infrared thermopile array chip.

[0027] Furthermore, an appropriate formula is used to determine the height difference between the infrared thermopile array chip and the substrate, thereby further combining the tangent value of the focal angle of the lens, the horizontal distance between the infrared thermopile array chip and the device support, the preset upper and lower limits of the device height process specifications, and the height of the device support to improve the accuracy of determining the height value of the infrared thermopile array chip.

[0028] Furthermore, the infrared thermopile array vertically comprises a first region located at the top and a second region located at the bottom. When in user operation, the first region is used to measure the user's temperature, while the second region is used to measure the temperature of the device being measured. This improves measurement accuracy by using different regions to measure the user's temperature and the temperature of the device being measured.

[0029] Furthermore, there is a gap between the first area and the second area, and the gap is filled with a redundant module, so that by setting the gap, the impact on one area when measuring the other area can be effectively reduced.

[0030] Furthermore, when determining the sum of the absolute values ​​of the temperature differences between two adjacent moments of the user operation area within the first preset time length and the average temperature value of the user operation area within the first preset time length, the real-time measurement data of the infrared contacts in the first horizontal row from the top of the first area are used for calculation, which can prevent the infrared contacts below the first area from being affected by the high temperature data of the second area; when determining the sum of the absolute values ​​of the temperature differences between two adjacent moments of the instrument to be measured within the first preset time length and the average temperature value of the instrument to be measured within the first preset time length, the real-time measurement data of the infrared contacts in the first horizontal row from the bottom of the second area are used for calculation, which can prevent the infrared contacts above the second area from being affected by the low temperature data of the first area. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a flow chart of an over-temperature warning method in an embodiment of the present invention;

[0032] Figure 2 1 is a flow chart of another over-temperature warning method in an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of a working scenario in which an infrared thermopile array chip is used for measurement in an embodiment of the present invention;

[0034] Figure 4 is a schematic cross-sectional structural diagram of an infrared thermopile array chip according to an embodiment of the present invention;

[0035] Figure 5 Schematic diagram of the positional relationship between a projection area formed by the focal point of a lens and the extended lines connecting the edge points of the lens and an instrument to be measured in an embodiment of the present invention;

[0036] Figure 6 is a schematic side structural diagram of an infrared thermopile array in an embodiment of the present invention;

[0037] Figure 7 It is a structural schematic diagram of an over-temperature warning device in an embodiment of the present invention.

[0038] Description of the accompanying drawings:

[0039] Infrared thermopile array chip 10 , substrate 30 , instrument support 40 , instrument to be measured 50 , infrared thermopile array 101 , lens 102 , peripheral device 103 , first area 1011 , redundant module 1012 , second area 1013 . DETAILED DESCRIPTION

[0040] As mentioned above, stoves are often used to heat or cook food. During the heating process, the temperature of the pot needs to be continuously monitored to avoid dry cooking. In existing temperature measurement methods, temperature measuring equipment is usually used to measure the temperature of the appliance and issue a warning when the temperature exceeds a preset temperature.

[0041] However, the existing judgment mechanism is too simple and cannot rule out interference from high temperatures caused by human factors, such as manually raising the temperature and continuously paying attention to the stove, manually shaking the pan to generate instantaneous high temperatures, etc., resulting in a high false alarm rate and a reduced user experience.

[0042] After research, it was found that if the user deliberately raises the temperature and keeps paying attention in front of the stove, there is actually no need for an alarm. In addition, when instantaneous high temperature is generated due to the user's operation of the appliance (such as shaking the spoon and the pot), it also falls under the situation of human supervision and an alarm may not be issued to avoid a decline in user experience due to continuous alarms.

[0043] In an embodiment of the present invention, by adopting real-time measurement data obtained by periodically measuring the temperature of the utensil to be measured and the temperature of the user operation area, when the temperature of the utensil to be measured exceeds the preset cooking safety temperature for a duration reaching the preset over-temperature warning duration, three judgment conditions for not issuing a warning message are set, so that it can be judged that the temperature change of the utensil is large, and the user may have flipped the wok and the pan, and the over-temperature warning at this time is likely to cause a false alarm; it can also be judged based on the quotient of the absolute value of the temperature difference of two adjacent moments of the utensil to be measured within the first preset time length and the average temperature value of the utensil to be measured within the first preset time length being greater than or equal to a first preset ratio. If the quotient of the temperature of the user operation area within the first preset time period is greater than or equal to the second preset ratio, it is judged that the temperature change of the user operation area is large, and the user may manually increase the temperature of the appliance to produce an instantaneous high temperature in the user operation area (such as spark jitter, oil point interference, etc. caused by frying operation), or the user may walk in front of the appliance, and an over-temperature warning is likely to cause a false alarm at this time; it can also be judged that the user operation area is supervised by a person based on the average temperature value of the user operation area within the first preset time period being greater than or equal to the preset lower limit of human body temperature, and the user may manually increase the temperature of the appliance to produce a stable high temperature in the user operation area (such as a stable temperature rise caused by steaming operation), and an over-temperature warning is likely to cause a false alarm at this time. By adopting the solution in the embodiment of the present invention, by excluding one or more of the above situations, only in the cases other than these, it is judged as a dry burning situation without supervision, and a warning message is issued, which can effectively reduce the possibility of false alarms and improve user experience.

[0044] In order to make the above-mentioned objects, features and beneficial effects of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0045] Reference Figure 1 , Figure 1 Flowchart of an over-temperature warning method according to an embodiment of the present invention. The over-temperature warning method may include steps S11 to S12:

[0046] Step S11: acquiring real-time measurement data, wherein the real-time measurement data is obtained by periodically measuring the temperature of the device to be measured and the temperature of the user operation area, wherein the user operation area is located above the device to be measured;

[0047] Step S12: When the temperature of the measured device exceeds the preset cooking safety temperature for a duration that reaches the preset over-temperature warning duration, no warning message is issued if one or more of the following is met; otherwise, a warning message is issued: the quotient of the sum of the absolute values ​​of the temperature differences of the measured device at two adjacent moments within the first preset duration and the average temperature value of the measured device within the first preset duration is greater than or equal to a first preset ratio; the quotient of the sum of the absolute values ​​of the temperature differences of the user operation area at two adjacent moments within the first preset duration and the average temperature value of the user operation area within the first preset duration is greater than or equal to a second preset ratio; the average temperature value of the user operation area within the first preset duration is greater than or equal to the preset lower limit of human body temperature.

[0048] In the specific implementation of step S11, the user operation area is located above the instrument to be measured. When the user is in the operating state, the user operation area can cover a part of the user, so that the measured temperature of the user operation area can be used to indicate the user's status, such as whether the user is around the instrument to be measured.

[0049] The real-time measurement data may be obtained by periodically measuring the temperature of the device to be measured and the temperature of the user operation area.

[0050] In a specific implementation, seconds or milliseconds may be used as the periodic measurement period (also referred to as period interval period), for example, measurement may be performed every 100 ms, or every 1 s, and so on.

[0051] In the specific implementation of step S12, when the temperature of the utensil to be measured exceeds the preset cooking safety temperature for a duration that reaches the preset over-temperature warning duration, multiple judgment conditions for not issuing a warning message are set. If one or more of the conditions are met, no warning message is issued; otherwise, a warning message is issued.

[0052] In specific implementation, appropriate temperature measuring devices, such as thermistor temperature control probes, can be used to measure the temperature of the appliance above the probe, and a certain over-temperature warning time (also called benchmark warning time) can be pre-set to issue a warning when the temperature exceeds the preset temperature.

[0053] Specifically, the various judgment conditions for not issuing warning information may include: the quotient of the sum of the absolute values ​​of the temperature differences of the instrument to be measured at two adjacent moments within the first preset time length and the average temperature value of the instrument to be measured within the first preset time length is greater than or equal to a first preset ratio; the quotient of the sum of the absolute values ​​of the temperature differences of the user operation area at two adjacent moments within the first preset time length and the average temperature value of the user operation area within the first preset time length is greater than or equal to a second preset ratio; the average temperature value of the user operation area within the first preset time length is greater than or equal to the preset lower limit of human body temperature.

[0054] The following combination Figure 2 Provide detailed explanation.

[0055] Reference Figure 2 , Figure 2 FIG2 is a flow chart of another over-temperature warning method in an embodiment of the present invention. The another over-temperature warning method may include steps S21 to S27, and each step is described below.

[0056] In step S21 , measurement data is acquired, where the measurement data is obtained by periodically measuring the temperature of the device to be measured and the temperature of the user operation area.

[0057] For more details about step S21, please refer to the previous text and Figure 1 Step S11 in is executed and will not be repeated here.

[0058] In step S22, determine whether the temperature of the utensil to be measured exceeds the preset cooking safety temperature for a duration that reaches the preset over-temperature warning duration. If the judgment result is yes, continue to execute steps S23, S24 and S25. If the judgment result is no, jump to step S26.

[0059] In a specific implementation, exceeding a preset cooking safety temperature can be used to indicate dry cooking, and the preset cooking safety temperature can be selected from a cooking temperature range when there is no supervision, such as 200°C to 450°C.

[0060] The over-temperature warning duration can be used to indicate the safety time in the dry-burning state. By setting the duration of exceeding the preset cooking safety temperature to reach the preset over-temperature warning duration, it is determined whether to issue a warning message, which can effectively reduce the alarm frequency.

[0061] In step S23, determine whether the quotient of the sum of the absolute values ​​of the temperature differences between two adjacent moments of the instrument to be measured within the first preset time period and the average temperature value of the instrument to be measured within the first preset time period is greater than or equal to a first preset ratio. If the judgment result is yes, continue to step S26; if the judgment result is no, continue to step S27.

[0062] Specifically, the first preset ratio may be determined using the following formula:

[0063]

[0064] Wherein, R1 is used to represent the first preset ratio, T i+1 It is used to represent the temperature of the instrument to be measured at the later moment (i.e., time i+1) between the two adjacent moments (i.e., time i and time i+1). i It is used to indicate the temperature of the previous moment (i.e., moment i) among the temperatures of the instrument to be measured at two adjacent moments (i.e., moment i and moment i+1). i is used to indicate the i-th moment. I is used to indicate that the first preset time length includes I moments. T m Used to represent the average temperature value of the device to be measured within a first preset time period.

[0065] More specifically, based on the fact that the quotient of the sum of the absolute values ​​of the temperature differences of the instrument to be measured at two adjacent moments within the first preset time period and the average temperature value of the instrument to be measured within the first preset time period is greater than or equal to a first preset ratio, it can be judged that the temperature change of the instrument is large, and the user may have tossed the pan or stir the pot. At this time, an over-temperature warning is likely to cause a false alarm.

[0066] Furthermore, the first preset duration can be determined based on the over-temperature warning duration.

[0067] In an embodiment of the present invention, the first preset time period is less than the over-temperature warning time period and is greater than or equal to 1 / 2 of the over-temperature warning time period. By adopting the above scheme, by having the first preset time period be less than the over-temperature warning time period, only the situation within a certain recent time period can be checked to avoid interference from historical data; by having the first preset time period be greater than 1 / 2 of the over-temperature warning time period, it is possible to avoid setting an overly short judgment time, so as to avoid spark jitters and oil spot interference that may cause misjudgment of someone as someone when there is no one.

[0068] Furthermore, the first preset ratio may be greater than or equal to 1.

[0069] In an embodiment of the present invention, since the actual temperature of the instrument to be measured is often high and the actual temperature change is often large, the first preset ratio should not be set too small at this time. By setting the first preset ratio to be greater than or equal to 1, the cumulative result of the sum of the absolute values ​​of the temperature differences of two adjacent moments of the instrument to be measured within the first preset time period can be compared. When the sum of the absolute values ​​of the temperature differences is greater than or equal to the average temperature of the instrument to be measured, it is judged that the user has flipped the wok or the pan, which effectively improves the effectiveness of the judgment.

[0070] In step S24, determine whether the quotient of the sum of the absolute values ​​of the temperature differences between two adjacent moments in the user operation area within the first preset time period and the average temperature value of the user operation area within the first preset time period is greater than or equal to a second preset ratio. If the judgment result is yes, continue to step S26; if the judgment result is no, continue to step S27.

[0071] Specifically, the second preset ratio may be determined using the following formula:

[0072]

[0073] Wherein, R2 is used to represent the second preset ratio, t i+1 It is used to represent the temperature of the user operation area at the later moment (i.e., time i+1) between the two adjacent moments (i.e., time i and time i+1), t i It is used to indicate the temperature of the previous moment (i.e., moment i) among the temperatures of two adjacent moments (i.e., moment i and moment i+1) in the user operation area. i is used to indicate the i-th moment. I is used to indicate that the first preset time length contains I moments. m Used to represent the average temperature value of the user operation area within a first preset time period.

[0074] More specifically, based on the fact that the quotient of the sum of the absolute values ​​of the temperature differences between two adjacent moments in the user operation area within the first preset time period and the average temperature value of the user operation area within the first preset time period is greater than or equal to a second preset ratio, it can be judged that the temperature change in the user operation area is large. The user may artificially increase the temperature of the appliance to cause instantaneous high temperature in the user operation area (for example, spark jitters and oil spot interference caused by frying operations). There may also be cases where the user walks in front of the appliance. At this time, an over-temperature warning is likely to cause a false alarm.

[0075] Furthermore, the second preset ratio may be greater than or equal to 1.

[0076] In an embodiment of the present invention, although the actual temperature is low, the instantaneous change is often large when the user walks or there is spark vibration or oil spot interference, the second preset ratio should not be set too small. By setting the second preset ratio to be greater than or equal to 1, the cumulative result of the sum of the absolute values ​​of the temperature differences between two adjacent moments in the user operation area within the first preset time period can be compared. When the sum of the absolute values ​​of the temperature differences is greater than or equal to the average temperature of the user operation area, it is judged that the user has artificially increased the temperature of the appliance, resulting in instantaneous high temperature in the user operation area, thereby effectively improving the effectiveness of the judgment.

[0077] In step S25, it is determined whether the average temperature value of the user operation area within the first preset time period is greater than or equal to the preset lower limit of human body temperature. If the judgment result is yes, step S26 is continued to be executed; if the judgment result is no, step S27 is continued to be executed.

[0078] Specifically, a temperature lower than the preset lower limit of human body temperature can be used to indicate that there is no supervision, and a temperature greater than or equal to the preset lower limit of human body temperature can be used to indicate that there is supervision of personnel in the user operation area.

[0079] The lower limit of human body temperature may be selected from the human body measurement temperature range, such as 34°C to 36°C.

[0080] More specifically, based on the fact that the average temperature value of the user operation area within the first preset time period is greater than or equal to the preset lower limit of human body temperature, it can be judged that there is personnel supervision in the user operation area, and a user may manually increase the temperature of the appliance to produce a stable high temperature in the user operation area (for example, a stable temperature rise caused by a steaming operation). At this time, an over-temperature warning is also likely to cause a false alarm.

[0081] In step S26, no warning message is issued.

[0082] In step S27, a warning message is issued.

[0083] In specific implementation, by issuing a warning message, it is possible to issue a warning message when the measured temperature exceeds the preset temperature and no one is paying attention, thereby effectively reducing the safety hazards caused by dry burning.

[0084] Specifically, after the warning message is issued and the preset gas shut-off time has elapsed, a gas shut-off instruction may be sent to the gas valve control module of the cooker.

[0085] By adopting the solution in the embodiment of the present invention, by excluding one or more of the above situations, only in other situations will it be determined as a dry burning situation without supervision, and a warning message will be issued, which can effectively reduce the possibility of false alarms and improve user experience.

[0086] Furthermore, the real-time measurement data may be obtained by periodically measuring the temperature of the device to be measured and the temperature of the user operation area using an infrared thermopile array chip.

[0087] Combined with reference Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of a working scenario in which an infrared thermopile array chip is used for measurement in an embodiment of the present invention. Figure 4 It is a schematic cross-sectional structure diagram of an infrared thermopile array chip in an embodiment of the present invention.

[0088] The infrared thermopile array chip 10 may include an infrared thermopile array device 101 and a lens 102 .

[0089] It should be noted that the lens 102 is suitable for the infrared thermopile array chip 10 , and may include, for example, an infrared filter or other appropriate material layer with infrared filtering function, allowing infrared light to pass through.

[0090] The lens 102 may be located above the infrared thermopile array device 101. The lens 102 faces the side of the device 50 to be measured and the user who operates the device 50 to be measured. In other words, the lens 102 faces the user operation area.

[0091] Furthermore, the infrared thermopile array chip 10 may further include: peripheral devices 103 .

[0092] The lens 102 is located above the infrared thermopile array device 101 and covers the infrared thermopile array device 101 and the peripheral devices 103 .

[0093] In the embodiment of the present invention, by using a single lens 102 to cover the chip of the infrared thermopile array device 101, more uniform thermal data can be obtained, and the data consistency between the devices arranged in the array is also better.

[0094] In specific implementations, because the infrared thermopile array chip 10 measures temperature based on an infrared thermopile array, compared to thermistor temperature control probes, the infrared thermopile array chip 10 uses a multi-point array, non-contact temperature measurement method. Therefore, the distance from the device to be measured 50 has less impact on measurement accuracy (i.e., better environmental adaptability). Furthermore, because multi-point array temperature measurement can measure array-distributed temperature data, it effectively expands the temperature measurement range. Furthermore, because the temperature data corresponds to the array distribution, there is no need to fuse the real-time measurement data of multiple devices.

[0095] Since the infrared thermopile array chip 10 is non-contact measurement and has no wear, it has a long service life and high measurement stability.

[0096] Furthermore, the infrared thermopile array chip 10 has a relatively wide measurement range. In one embodiment, the measurement range is [-20°C, 400°C]. Since oil temperature measurement requires 360°C, it is more suitable for measuring higher temperature instruments such as oil temperature than thermistor temperature control probes.

[0097] Compared with thermistor temperature control probes, the infrared thermopile array chip 10 is a non-contact measurement that does not require contact with the device 50 to be measured and measures from the side. Therefore, there is no requirement for the shape of the device 50 to be measured (such as a pointed bottom pot, a flat pan, etc.).

[0098] In an embodiment of the present invention, an infrared thermopile array chip 10 is used to periodically measure the temperature of the device to be measured 50 and the temperature of the user operating area to obtain real-time measurement data. Compared with the use of point-type temperature measuring devices, array-distributed temperature measurement data can be collected, effectively expanding the temperature measurement range while not requiring fusion processing of the real-time measurement data of multiple devices. By setting the lens 102 of the infrared thermopile array chip 10 to face the side of the device to be measured 50 and the user operating the device to be measured 50, the projection area of ​​the lens 102 can simultaneously cover a portion of the device to be measured 50 and a portion of the user in the user operating state, thereby detecting whether a user is operating the cooker and whether high temperature interference is caused by human factors, thereby helping to reduce the false alarm rate.

[0099] like Figure 3 As shown, the instrument 50 to be measured can be placed on an instrument support 40 , and the instrument support 40 is detachably fixed on the base plate 30 .

[0100] In a specific embodiment, the cooker may include a base plate 30 and a utensil support 40 , wherein the utensil support 40 is detachably fixed to the base plate 30 .

[0101] Taking the example of the utensil 50 to be measured being a pot heated by a stove, the utensil support 40 may be a pot rack of the stove.

[0102] Taking the device 50 to be measured as a device heated by an electric furnace as an example, the device support 40 may be the furnace body of the electric furnace.

[0103] Furthermore, the height difference between the infrared thermopile array chip 10 and the substrate 30 can be determined based on the focal angle of the lens 102 and the horizontal distance between the infrared thermopile array chip 10 and the device support 40, so that when the user is operating, the projection area of ​​the lens 102 can simultaneously cover a portion of the device to be measured 50 and a portion of the user.

[0104] Reference Figure 5 , Figure 5 The figure is a schematic diagram of the positional relationship between a projection area formed by the focal point of a lens and the extended lines connecting the edge points of the lens and an instrument to be measured in an embodiment of the present invention.

[0105] As shown in the figure, the height difference between the infrared thermopile array chip 10 and the substrate 30 is represented by H, the horizontal distance between the infrared thermopile array chip 10 and the device support 40 is represented by d, and the height of the device support is represented by h.

[0106] The focal angle α is the angle between the central axis of the lens 102 and the line connecting the focal point of the lens 102 and the edge of the lens 102 .

[0107] Furthermore, the height difference H can be determined based on the focal angle of the lens 102 and the horizontal distance between the infrared thermopile array chip 10 and the device support 40, so that a more appropriate height value can be calculated according to actual conditions, effectively realizing the detection of interference conditions by the infrared thermopile array chip 10.

[0108] Furthermore, the height difference between the infrared thermopile array chip 10 and the substrate 30 can be determined using the following formula:

[0109] (H U +hd×tanα) <H<(H L +h+d×tanα);

[0110] Wherein, H is used to represent the height difference between the infrared thermopile array chip and the substrate, d is used to represent the horizontal distance between the infrared thermopile array chip and the device support, α is used to represent the focal angle, H U Used to indicate the preset upper limit of the tool height process specification, H L It is used to indicate the preset lower limit value of the tool height process specification, and h is used to indicate the height of the tool support.

[0111] Among them, H U Used to indicate the preset upper limit of the tool height process specification, H L Used to indicate the preset lower limit of the instrument height process specification.

[0112] It should be noted that although the utensil 50 to be measured in the embodiment of the present invention can be of various types, such as a steamer, a wok, a frying pan, etc., the height of the utensil 50 to be measured that can be used for a stove should be within a certain range, that is, the utensil 50 to be measured needs to be within the preset upper limit value H of the utensil height process specification. Uand the preset lower limit value H of the instrument height process specification L between.

[0113] In the embodiment of the present invention, by setting a preset upper limit value H of the tool height process specification U and the preset lower limit value H of the instrument height process specification L , you can set a suitable height difference H based on wider and more complex application scenarios.

[0114] In an embodiment of the present invention, an appropriate formula is used to determine the height difference between the infrared thermopile array chip 10 and the substrate 30, thereby further combining the tangent value of the focal angle of the lens 102, the horizontal distance between the infrared thermopile array chip 10 and the device support 40, the preset upper and lower limits of the device height process specification, and the height of the device support 40 to improve the accuracy of determining the height value of the infrared thermopile array chip 10.

[0115] It should be noted that after determining the height difference between the infrared thermopile array chip 10 and the substrate 30, the height of the infrared thermopile array chip 10 can be fixed in an appropriate manner. For example, the infrared thermopile array chip 10 can be installed on an independent bracket, or the infrared thermopile array chip 10 can be installed on the back panel of the integrated cooker.

[0116] Furthermore, the infrared thermopile array 101 may include a first area located at the top and a second area located at the bottom in the vertical direction.

[0117] Reference Figure 6 , Figure 6 It is a schematic side structural diagram of an infrared thermopile array in an embodiment of the present invention.

[0118] As shown in the figure, the infrared thermopile array 101 includes a first area 1011 located at the top and a second area 1013 located at the bottom in the vertical direction.

[0119] In the user operation state, the first area 1011 is used to measure the temperature of the user, and the second area 1013 is used to measure the temperature of the device 50 to be measured.

[0120] In the embodiment of the present invention, by providing a first area 1011 and a second area 1013, when a user is operating, the first area 1011 is used to measure the user's temperature, and the second area 1013 is used to measure the temperature of the instrument to be measured 50. Thus, different areas can be used to measure the user's temperature and the temperature of the instrument to be measured 50, respectively. Because the infrared thermopile array chip 10 utilizes a multi-point array, non-contact temperature measurement method, the distance from the instrument to be measured 50 and the user has little impact on measurement accuracy, resulting in better environmental adaptability and effectively improving measurement accuracy.

[0121] Furthermore, there may be a gap between the first area 1011 and the second area 1013 , and the redundancy module 1012 is used to fill the gap.

[0122] In an embodiment of the present invention, there may be a gap between the first area 1011 and the second area 1013, and the redundant module 1012 is used to fill the gap, so that by setting the gap, the impact on one area when measuring the other area can be effectively reduced.

[0123] Furthermore, the temperature measuring device may satisfy one or more of the following conditions: the lowest height of the first region 1011 is higher than the upper limit value H of the preset instrument height process specification. u and the height of the apparatus support 40; the maximum height of the second region 1013 is lower than the preset apparatus height process specification lower limit value H L and the height of the appliance support 40.

[0124] In the embodiment of the present invention, the lowest height of the first region 1011 is higher than the upper limit value H of the preset tool height process specification. u The sum of the heights of the first area 1011 and the instrument support 40 can achieve that at least a portion of the first area 1011 is higher than the instrument to be measured 50, so that even if the instrument to be measured 50 is high and the distance between the temperature measuring device and the instrument to be measured 50 is close (i.e., d is small), at least a portion of the higher first area 1011 can be used to measure the user.

[0125] In addition, the highest height of the second region 1013 is lower than the preset lower limit value H of the equipment height process specification. L The sum of the heights of the second region 1013 and the instrument support 40 can achieve that at least a portion of the second region 1013 is lower than the instrument to be measured 50. Therefore, even when the height of the instrument to be measured 50 is relatively low and the distance between the temperature measuring device and the instrument to be measured 50 is relatively close (i.e., d is relatively small), at least a portion of the lower second region 1013 can be used to measure the instrument.

[0126] Furthermore, when determining the sum of the absolute values ​​of the temperature differences between two adjacent moments in the user operation area within the first preset time period and the average temperature value of the user operation area within the first preset time period, the real-time measurement data of the infrared contacts in the first horizontal row from the top of the first area 1011 can be used for calculation.

[0127] Specifically, Figure 6 The first area 1011 shown is represented by two horizontal rows of infrared contacts, and only the real-time measurement data of the infrared contacts in the first horizontal row from the top, which are circled by a dotted ellipse, can be used for calculation.

[0128] When determining the sum of the absolute values ​​of the temperature differences between two adjacent moments of the instrument to be measured within the first preset time period and the average temperature value of the instrument to be measured within the first preset time period, the real-time measurement data of the infrared contacts in the first horizontal row from the bottom of the second area are used for calculation.

[0129] Specifically, Figure 6 The second area 1013 shown is represented by two horizontal rows of infrared contacts, and the calculation can be performed using only the real-time measurement data of the infrared contacts in the first horizontal row from the bottom, which are circled by the dotted ellipse.

[0130] In an embodiment of the present invention, when determining the sum of the absolute values ​​of the temperature differences between two adjacent moments of the user operation area within the first preset time length and the average temperature value of the user operation area within the first preset time length, the real-time measurement data of the infrared contacts in the first horizontal row from the top of the first area 1011 are used for calculation, which can prevent the infrared contacts below the first area 1011 from being affected by the high temperature data of the second area 1013; when determining the sum of the absolute values ​​of the temperature differences between two adjacent moments of the instrument to be measured within the first preset time length and the average temperature value of the instrument to be measured within the first preset time length, the real-time measurement data of the infrared contacts in the first horizontal row from the bottom of the second area 1013 are used for calculation, which can prevent the infrared contacts above the second area 1013 from being affected by the low temperature data of the first area 1011.

[0131] Reference Figure 7 , Figure 7 : is a schematic diagram of the structure of an over-temperature warning device in an embodiment of the present invention. The over-temperature warning device may include:

[0132] A data acquisition module 71 is used to acquire real-time measurement data, wherein the real-time measurement data is obtained by periodically measuring the temperature of the device to be measured and the temperature of the user operation area, wherein the user operation area is located above the device to be measured;

[0133] The warning determination module 72 is used to not issue a warning message when the temperature of the measured device exceeds the preset cooking safety temperature for a continuous period reaching the preset over-temperature warning period if one or more of the following is met, otherwise a warning message is issued: the quotient of the sum of the absolute values ​​of the temperature differences of the measured device at two adjacent moments within the first preset period and the average temperature value of the measured device within the first preset period is greater than or equal to a first preset ratio; the quotient of the sum of the absolute values ​​of the temperature differences of the user operation area at two adjacent moments within the first preset period and the average temperature value of the user operation area within the first preset period is greater than or equal to a second preset ratio; the average temperature value of the user operation area within the first preset period is greater than or equal to the preset lower limit of human body temperature.

[0134] For the principle, specific implementation and beneficial effects of the over-temperature warning device, please refer to the previous article and Figures 1 to 6 The related description about the over-temperature warning method shown is not repeated here.

[0135] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the steps of the above method. The storage medium may be a computer-readable storage medium, such as a non-volatile memory or a non-transitory memory, or an optical disk, a mechanical hard disk, a solid-state drive, or the like.

[0136] Specifically, in the embodiment of the present invention, the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0137] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0138] In an embodiment of the present invention, a cooker is further provided, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor executes the steps of the above-mentioned over-temperature warning method when running the computer program.

[0139] The stove may be a gas stove, an electronic stove, or other appropriate appliances.

[0140] It should be pointed out that the instrument to be measured suitable for the above-mentioned stove can be a pot suitable for the stove, for example, it can be selected from: cast iron pot, wrought iron pot, titanium pot, stainless steel pot, ceramic pot, non-stick pot, enamel pot, and can also be selected from pots made of other appropriate materials and other appropriate manufacturing processes.

[0141] It should be understood that the term "and / or" as used herein simply describes an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " as used herein indicates that the related objects are in an "or" relationship.

[0142] The term "plurality" used in the embodiments of the present application refers to two or more.

[0143] The first, second, etc. descriptions appearing in the embodiments of this application are only for illustration and distinction of the description objects. There is no order, nor does it indicate any special limitation on the number of devices in the embodiments of this application, and cannot constitute any limitation on the embodiments of this application.

[0144] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. An over-temperature warning method, characterized in that: include: Acquiring real-time measurement data, wherein the real-time measurement data is obtained by periodically measuring the temperature of the device to be measured and the temperature of a user operation area, wherein the user operation area is located above the device to be measured; When the temperature of the utensil to be measured exceeds the preset cooking safety temperature for a duration equal to the preset over-temperature warning duration, no warning message is issued if one or more of the following conditions are met; otherwise, a warning message is issued: The quotient of the sum of the absolute values ​​of the temperature differences of the device to be measured at two adjacent moments within a first preset time period and the average temperature value of the device to be measured within the first preset time period is greater than or equal to a first preset ratio; The quotient of the sum of the absolute values ​​of the temperature differences between two adjacent moments of the user operation area within the first preset time period and the average temperature value of the user operation area within the first preset time period is greater than or equal to a second preset ratio; The average temperature value of the user operation area within the first preset time period is greater than or equal to a preset lower limit of human body temperature.

2. The method according to claim 1, characterized in that The first preset duration is less than the over-temperature warning duration and is greater than or equal to 1 / 2 of the over-temperature warning duration.

3. The method according to claim 1, characterized in that The first preset ratio is greater than or equal to 1, and / or the second preset ratio is greater than or equal to 1.

4. The method according to claim 1, wherein The real-time measurement data is obtained by periodically measuring the temperature of the device to be measured and the temperature of the user's operating area using an infrared thermopile array chip; The infrared thermopile array chip includes an infrared thermopile array device and a lens located above the infrared thermopile array device, wherein the lens faces the side of the device to be measured and the user operating the device to be measured.

5. The method according to claim 4, characterized in that The instrument to be measured is placed on an instrument support, and the instrument support is detachably fixed on the base plate; The height difference between the infrared thermopile array chip and the substrate is determined according to the focal angle of the lens and the horizontal distance between the infrared thermopile array chip and the device support, so that the projection area of ​​the lens can simultaneously cover a part of the device to be measured and a part of the user when the user is operating.

6. The method according to claim 5, characterized in that The height difference between the infrared thermopile array chip and the substrate is determined using the following formula: (H U +h-d×tanα)<H<(H L +h+d×tanα); Wherein, H is used to represent the height difference between the infrared thermopile array chip and the substrate, d is used to represent the horizontal distance between the infrared thermopile array chip and the device support, α is used to represent the focal angle, H U Used to indicate the preset upper limit of the tool height process specification, H L It is used to indicate the preset lower limit value of the tool height process specification, and h is used to indicate the height of the tool support.

7. The method according to claim 4, characterized in that The infrared thermopile array includes a first area located at the top and a second area located at the bottom in the vertical direction; Wherein, in the user operation state, the first area is used to measure the temperature of the user, and the second area is used to measure the temperature of the device to be measured.

8. The method according to claim 7, characterized in that There is a gap between the first area and the second area, and the gap is filled with a redundant module.

9. The method according to claim 7, characterized in that Meet one or more of the following: When determining the sum of the absolute values ​​of the temperature differences between two adjacent moments of the user operation area within the first preset time length and the average temperature value of the user operation area within the first preset time length, the real-time measurement data of the infrared contacts in the first row from the top of the first area are used for calculation; when determining the sum of the absolute values ​​of the temperature differences between two adjacent moments of the instrument to be measured within the first preset time length and the average temperature value of the instrument to be measured within the first preset time length, the real-time measurement data of the infrared contacts in the first row from the bottom of the second area are used for calculation.

10. An over-temperature warning device, characterized in that: include: a data acquisition module, configured to acquire real-time measurement data, the real-time measurement data being obtained by periodically measuring the temperature of the instrument to be measured and the temperature of a user operation area, the user operation area being located above the instrument to be measured; The warning determination module is configured to, when the temperature of the utensil to be measured exceeds the preset cooking safety temperature for a duration equal to a preset over-temperature warning duration, not issue a warning message if one or more of the following conditions are met, and otherwise issue a warning message: The quotient of the sum of the absolute values ​​of the temperature differences of the device to be measured at two adjacent moments within a first preset time period and the average temperature value of the device to be measured within the first preset time period is greater than or equal to a first preset ratio; The quotient of the sum of the absolute values ​​of the temperature differences between two adjacent moments of the user operation area within the first preset time period and the average temperature value of the user operation area within the first preset time period is greater than or equal to a second preset ratio; The average temperature value of the user operation area within the first preset time period is greater than or equal to a preset lower limit of human body temperature.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the over-temperature warning method according to any one of claims 1 to 9 are executed.

12. A cooker comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, wherein: When the processor runs the computer program, the processor performs the steps of the over-temperature warning method according to any one of claims 1 to 9.

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