CN113029285B - Self-learning water level detection method of coffee machine and coffee machine - Google Patents
Self-learning water level detection method of coffee machine and coffee machine Download PDFInfo
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- CN113029285B CN113029285B CN202110154909.2A CN202110154909A CN113029285B CN 113029285 B CN113029285 B CN 113029285B CN 202110154909 A CN202110154909 A CN 202110154909A CN 113029285 B CN113029285 B CN 113029285B
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- 238000011897 real-time detection Methods 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 19
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
- G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/44—Parts or details or accessories of beverage-making apparatus
- A47J31/4403—Constructional details
- A47J31/4457—Water-level indicators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/261—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields for discrete levels
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Food Science & Technology (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Apparatus For Making Beverages (AREA)
Abstract
The invention relates to a self-learning water level detection method of a coffee machine and the coffee machine, wherein the coffee machine comprises the following components: a water tank, a water level detection device arranged outside the water tank to detect water level information in the water tank; the self-learning water level detection method of the coffee machine comprises the following steps: acquiring a water level detection signal of the water level detection device in a preset time period; self-learning is carried out according to the water level detection signal in a preset time period, and a judgment value of water level detection is obtained; obtaining a reference value of water level detection according to the judgment value of water level detection and the error value of the water level detection device; acquiring a real-time detection signal of a water level detection device; and determining the water level information of the coffee machine according to the real-time detection signal and the reference value. The coffee machine can automatically calibrate, has the advantages of simple calibration mode, short calibration time and high calibration efficiency, effectively improves the water level detection precision of the coffee machine, has no requirement on the operation method of a user, and has strong applicability.
Description
Technical Field
The invention relates to the technical field of coffee machines, in particular to a self-learning water level detection method of a coffee machine and the coffee machine.
Background
In order to meet the demands of people on coffee, the existing coffee machine is more and more perfect in function and more intelligent, such as automatic brewing, automatic grinding and the like, and can automatically set temperature, use amount and the like according to the demands, and in order to avoid dry heating of the coffee machine or water overflow, the existing coffee machine is provided with a water level detection function. However, the calibration mode of the prior coffee machine for each water level detection is troublesome, the calibration time is long, the efficiency is low, and further, the calibration needs to be performed again after each calibration is completed, so that the water level detection error of the coffee machine is increased.
Disclosure of Invention
The invention aims to solve the technical problem of providing a self-learning water level detection method of a coffee machine and the coffee machine aiming at the defects in the prior art.
The technical scheme adopted for solving the technical problems is as follows: a self-learning water level detection method for a coffee machine is constructed for a coffee machine, the coffee machine comprising: a water tank, a water level detection device arranged outside the water tank to detect water level information in the water tank; the self-learning water level detection method of the coffee machine comprises the following steps:
Acquiring a water level detection signal of the water level detection device in a preset time period;
self-learning is carried out according to the water level detection signal in the preset time period, and a judgment value of water level detection is obtained;
obtaining a reference value of water level detection according to the judgment value of the water level detection and the error value of the water level detection device;
acquiring a real-time detection signal of the water level detection device;
and determining the water level information of the coffee machine according to the real-time detection signal and the reference value.
In the self-learning water level detection method of the coffee machine of the invention, the water level detection device comprises: a main detection device and N sub-detection devices;
the N sub-detection devices are adjacently arranged along the axis direction of the water tank, a first sub-detection device of the N sub-detection devices is close to the top of the water tank, and an Nth sub-detection device of the N sub-detection devices is close to the bottom of the water tank.
In the self-learning water level detection method of the coffee machine, the main detection device comprises a main body part and a plurality of convex parts which are arranged at intervals;
the plurality of protruding parts are inserted between two adjacent sub-detection devices, a first protruding part of the plurality of protruding parts is arranged between the first sub-detection device and the second sub-detection device, and a last protruding part of the plurality of protruding parts is arranged below the Nth sub-detection device.
In the self-learning water level detection method of a coffee machine of the present invention, the acquiring the water level detection signal within the preset time period of the water level detection device includes:
and acquiring water level detection signals in a preset time period of the main detection device and water level detection signals in preset time periods of the N sub-detection devices.
In the self-learning water level detection method of the coffee machine of the present invention, the self-learning according to the water level detection signal within the preset time period, the obtaining of the judgment value of the water level detection includes:
judging whether the continuously-changed water level detection signals of the main detection device and the continuously-changed water level detection signals of any one of the N sub-detection devices are continuously received according to the water level detection signals of the main detection device in the preset time period and the water level detection signals of the N sub-detection devices in the preset time period;
if the continuously-changing water level detection signal of the main detection device and the continuously-changing water level detection signal of any one of the N sub-detection devices are continuously received, continuously monitoring the moment when the water level detection signal output by the sub-detection device is not changed;
If the water level detection signal output by the sub-detection device is not changed and the water level detection signal output by the main detection device is kept changed, continuing to monitor the sub-detection device and the main detection device and keeping the second duration;
recording the induction value and the first duration of the sub-detection device at the current moment;
the current moment is the moment when the sub-detection device does not output a water level detection signal and the main detection device outputs the water level detection signal; the first duration is: continuously outputting a water level detection signal from any one of the main detection device and the N sub detection devices to a time period at the current moment when the water level detection signal output by the sub detection device is unchanged; the second duration is a period of time from the current moment to the back of the sub-detection device;
the sensing value of the sub-detection device at the current moment is the judging value of water level detection of the position of the sub-detection device.
In the coffee machine self-learning water level detection method of the present invention, the preset time period, the duration time and the current time satisfy:
the preset time period is less than or equal to the first duration time and the second duration time;
The first duration is greater than or equal to a first threshold; the second duration is greater than or equal to a second threshold.
In the self-learning water level detection method of a coffee machine of the present invention, the acquiring the water level detection signal within the preset time period of the water level detection device includes:
and adjusting the induction parameters of the main detection device and the induction parameters of any one of the N sub-detection devices to control the water level to be equivalent to the induction variation of the main detection device in the descending process of the induction area of any one of the N sub-detection devices.
In the self-learning water level detection method of the coffee machine, the judgment value of the water level detection comprises: n judgment values of N water level lines;
the reference values include: first and second reference values for the N water lines;
the error value of the water level detection device comprises: a first error value and a second error value; the first error value is less than or equal to the second error value;
the obtaining the reference value of the water level detection according to the judgment value of the water level detection and the error value of the water level detection device comprises the following steps:
subtracting the judgment value of each water line from the first error value to obtain a difference value of the judgment value of the water line and the first error value; the difference value between the judging value of the water level line and the first error value is a first reference value of the water level line;
Adding the judgment value of each water line with the second error value to obtain the sum value of the judgment value of the water line and the second error value; and the sum of the judging value of each water level line and the second error value is a second reference value of the water level line.
In the self-learning water level detection method of the coffee machine of the present invention, the determining the water level information of the coffee machine according to the real-time detection signal and the reference value includes:
comparing the real-time detection signal of each sub-detection device with the first reference value and the second reference value of the corresponding water level line;
if the real-time detection signal of the sub-detection device is larger than the first reference value of the corresponding water level line, the water level of the sub-detection device is below the set water level line;
if the real-time detection signal of the sub-detection device is smaller than the second reference value of the corresponding water line, the water level is above the set water line of the sub-detection device.
In the self-learning water level detection method of the coffee machine, the method further comprises the following steps:
before water level detection, acquiring an empty water state sensing value and a full water state sensing value of the water level detection device by adjusting the sensitivity of the water level detection device;
Based on the empty water state sensing value and the full water state sensing value, a change threshold of the water level detection device is obtained;
and determining an error value of the water level detection device according to the change threshold value of the water level detection device.
In the self-learning water level detection method of the coffee machine, the N sub-detection devices are all long-strip-shaped, and the length direction of the long strip-shaped is parallel to the horizontal plane of the water tank.
In the self-learning water level detection method of the coffee machine, the method further comprises the following steps:
outputting water level information of the coffee machine;
and/or outputting a control signal and/or an early warning signal according to the water level information of the coffee machine.
The invention also provides a coffee machine, comprising a water tank, a water level detection device arranged outside the water tank for detecting water level information in the water tank, and a control unit connected with the water level detection device, wherein the control unit is used for:
acquiring a water level detection signal of the water level detection device in a preset time period;
self-learning is carried out according to the water level detection signal in the preset time period, and a judgment value of water level detection is obtained;
obtaining a reference value of water level detection according to the judgment value of the water level detection and the error value of the water level detection device;
Acquiring a real-time detection signal of the water level detection device;
and determining the water level information of the coffee machine according to the real-time detection signal and the reference value.
In the coffee machine of the present invention, the water level detecting means includes: a main detection device and N sub-detection devices;
the N sub-detection devices are adjacently arranged along the axis direction of the water tank, a first sub-detection device of the N sub-detection devices is close to the top of the water tank, and an Nth sub-detection device of the N sub-detection devices is close to the bottom of the water tank.
In the coffee machine of the present invention, the main detecting device includes a main body and a plurality of protruding parts arranged at intervals;
the plurality of protruding parts are inserted between two adjacent sub-detection devices, a first protruding part of the plurality of protruding parts is arranged between the first sub-detection device and the second sub-detection device, and a last protruding part of the plurality of protruding parts is arranged below the Nth sub-detection device.
In the coffee machine of the present invention, the N sub-detecting devices are all elongated, and the length direction of the elongated shape is parallel to the horizontal plane of the water tank.
The self-learning water level detection method of the coffee machine and the coffee machine have the following beneficial effects: the coffee machine comprises: a water tank, a water level detection device arranged outside the water tank to detect water level information in the water tank; the self-learning water level detection method of the coffee machine comprises the following steps: acquiring a water level detection signal of the water level detection device in a preset time period; self-learning is carried out according to the water level detection signal in a preset time period, and a judgment value of water level detection is obtained; obtaining a reference value of water level detection according to the judgment value of water level detection and the error value of the water level detection device; acquiring a real-time detection signal of a water level detection device; and determining the water level information of the coffee machine according to the real-time detection signal and the reference value. The coffee machine can automatically calibrate, has the advantages of simple calibration mode, short calibration time and high calibration efficiency, effectively improves the water level detection precision of the coffee machine, has no requirement on the operation method of a user, and has strong applicability.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic view of the position of a water level detection device of a coffee machine according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a self-learning water level detection method for a coffee machine according to an embodiment of the present invention;
Fig. 3 is a schematic diagram of the time of water level change.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
In order to solve the problems of complex calibration mode, low calibration efficiency and poor precision in the water level detection of the target coffee machine, the invention provides the self-learning water level detection method of the coffee machine, which can automatically perform self-learning calibration on the water level detection, can perform self-learning calibration functions anytime and anywhere, has high calibration efficiency, effectively improves the water level detection precision, has no requirement on user operation, and has high applicability.
Specifically, referring to fig. 1, fig. 1 is a schematic diagram of a water level detection device of a coffee machine according to an embodiment of the present invention.
As shown in fig. 1, the coffee maker includes a water tank 100, a water level detecting device provided outside the water tank 100 to detect water level information in the water tank 100, and a control unit connected to the water level detecting device. Optionally, the control unit is coordinated inside the main body of the coffee machine, wherein the control unit and the main body are not illustrated.
Specifically, the water level detection device is configured to detect water level information in the water tank 100, output a corresponding water level detection signal in real time, and send the output water level detection signal to the control unit, where the control unit processes the water level detection signal to determine the water level information in the water tank 100 of the coffee machine.
In some embodiments, as shown in fig. 1, the water level detection apparatus may include: a main detection device and N sub-detection devices; the N sub-detection devices are adjacently disposed along the axial direction of the water tank 100, and a first sub-detection device k1 of the N sub-detection devices is disposed near the top 101 of the water tank 100, and an nth sub-detection device kN of the N sub-detection devices is disposed near the bottom 102 of the water tank 100.
In some embodiments, the main detecting device includes a main body 11, and a plurality of protruding portions disposed at intervals. The plurality of convex parts are inserted between two adjacent sub-detection devices, and a first convex part x1 of the plurality of convex parts is arranged between the first sub-detection device k1 and the second sub-detection device k2, and a last convex part of the plurality of convex parts is arranged below an Nth sub-detection device kN.
Optionally, the N sub-detecting devices are all elongated, and the length direction of the elongated shape is parallel to the horizontal plane of the water tank 100. For example, each of the N sub-detecting devices may be a rectangular parallelepiped, wherein a length direction of the rectangular parallelepiped is parallel to a horizontal plane of the water tank 100. Through setting up sub-detection device to rectangular shape, can effectively increase the response area, improve the detection precision.
Specifically, as shown in fig. 1, the N sub-detection devices include: the first sub-detecting device k1, the second sub-detecting device k2, the third sub-detecting devices k3, … …, and the nth sub-detecting device kN, N are integers greater than 1. The plurality of projections of the main detection device includes: the first bulge x1, the second bulge x2, the third bulge x3, … … and the nth bulge xn, wherein the first sub-detecting device k1 is arranged near the top 101 of the water tank 100 of the coffee machine, the nth sub-detecting device kN is arranged near the bottom 102 of the water tank 100 of the coffee machine, the first bulge x1 is arranged between the first sub-detecting device k1 and the second sub-detecting device k2, the second bulge x2 is arranged between the second sub-detecting device k2 and the third sub-detecting device k3, … …, and the nth bulge xn is arranged between the nth sub-detecting device kN and the bottom 102 of the water tank 100. Further, as shown in fig. 1, the set water level lines include N pieces, each including: the first water level line, the second water level line, the third water level line, … … and the Nth water level line, wherein the first water level line is arranged between the first sub-detection device k1 and the first convex part x1, the first sub-detection device k1 is positioned above the first water level line, and the first convex part x1 is positioned below the first water level line; likewise, the second water line is disposed between the second sub-detecting device k2 and the second protrusion x2, and the second sub-detecting device k2 is located above the second water line, and the second protrusion x2 is located below the second water line; and so on, the Nth water line is arranged between the Nth sub-detection device kN and the Nth bulge xn, the Nth sub-detection device kN is positioned above the Nth water line, and the Nth bulge xn is positioned below the Nth water line. Alternatively, in the embodiment of fig. 1, the N sub-detecting means and the main detecting means are provided on the same side outside the water tank 100. Of course, it is understood that in other embodiments, the main detecting device and the N sub-detecting devices may be disposed on opposite sides of the water tank 100, respectively, and any one of the sub-detecting devices is located above its current water line in the axial direction, and the protrusion adjacent thereto is located below its current water line.
Further, in alternative embodiments, the main detecting device, the first sub-detecting device k1, the second sub-detecting devices k2, … …, and the nth sub-detecting device kN may all be capacitive sensing detecting devices, where all the capacitive sensing devices may include capacitive electrode probes, and optionally, the capacitive electrode probes are all in a strip state.
Further, in some embodiments, the control unit is configured to: acquiring a water level detection signal of the water level detection device in a preset time period; self-learning is carried out according to the water level detection signal in a preset time period, and a judgment value of water level detection is obtained; obtaining a reference value of water level detection according to the judgment value of water level detection and the error value of the water level detection device; acquiring a real-time detection signal of a water level detection device; and determining the water level information of the coffee machine according to the real-time detection signal and the reference value.
Further, in some embodiments, the control unit is specifically further configured to output water level information of the coffee machine and display the water level, and/or output a control signal and/or an early warning signal according to the water level information of the coffee machine. Optionally, the control signals include, but are not limited to, stop water control signals, start water control signals, and early warning control signals. The early warning signals include, but are not limited to, display early warning signals, light early warning signals, alarm early warning signals. For example, when the water level of the water tank 100 is above or below the first water level, it is indicated that the water in the water tank 100 has reached the vicinity of the upper water level, at this time, the control unit outputs a control signal for stopping water injection, stopping water injection into the water tank 100, avoiding overflow, and sending an overflow early warning signal by means of lamplight flashing, buzzer alarm, etc.; or, when the water level of the water tank 100 is above or below the nth water level, it indicates that the water in the water tank 100 is very little, at this time, water needs to be injected into the water tank 100 in time, and the control unit outputs a start water injection signal to inject water into the water tank 100, so as to avoid dry burning of the coffee machine, and meanwhile, the control unit can send out a dry burning early warning signal in a light flashing mode, a buzzer mode and the like.
Referring to fig. 2, fig. 2 is a flow chart of a self-learning water level detection method of a coffee machine according to an embodiment of the invention. The self-learning water level detection method of the coffee machine can be realized through the coffee machine disclosed by the embodiment of the invention.
Specifically, as shown in fig. 2, the self-learning water level detection method of the coffee machine comprises the following steps:
step S201, acquiring a water level detection signal of the water level detection device in a preset time period.
In some embodiments, before the water level detection signal of the water level detection device in the preset time period is obtained, the sensing parameter of the main detection device and the sensing parameter of any one of the N sub-detection devices may be adjusted to control the sensing variation of the water level in the sensing area of any one of the N sub-detection devices to be equal to the sensing variation of the main detection device.
Specifically, the sensing width, the resistance-capacitance parameters, the software parameters and the like of each sub-detection device can be adjusted, so that the sensing variation of each sub-detection device is equivalent to the sensing variation of the main detection device in the process that the water level descends in the sensing area of each sub-detection device.
For example, as shown in fig. 1, the sensing width, the resistance-capacitance parameter, the software parameter, and the like of the first sub-sensing device k1 may be adjusted such that the sensing variation of the first sub-sensing device k1 is equal to the sensing variation of the main sensing device during the process that the water level is lowered in the sensing area of the first sub-sensing device k 1.
As shown in fig. 1, the sensing width, the resistance-capacitance parameter, the software parameter, and the like of the second sub-detection device k2 may be adjusted, so that the sensing variation of the second sub-detection device k2 is equal to the sensing variation of the main detection device in the process that the water level drops in the sensing area of the second sub-detection device k 2.
By analogy, the induction width, the resistance-capacitance parameters, the software parameters and the like of the Nth sub-detection device kN can be adjusted, so that the induction variation of the Nth sub-detection device kN is equivalent to that of the main detection device in the process that the water level descends in the induction zone of the Nth sub-detection device kN.
Further, in some embodiments, the empty water state sensing value and the full water state sensing value of the water level detection device are obtained by adjusting the sensitivity of the water level detection device before the water level detection is performed; based on the empty water state sensing value and the full water state sensing value, a change threshold of the water level detection device is obtained; and determining an error value of the water level detection device according to the change threshold value of the water level detection device.
Optionally, the change threshold of the water level detecting device is the change between the sensing value of the water level detecting device in the empty water state and the sensing value of the water level detecting device in the full water state.
In some embodiments, after determining the change threshold of the water level detection device, an error value of the water level detection device may be determined. Wherein, the error value of the water level detection device is one third of the change threshold value of the water level detection device.
Optionally, the error value of the water level detecting device includes: a first error value and a second error value. Wherein the first error value is less than or equal to the second error value. Wherein the first error value is used as a determination below the water line and the second error value is used as a determination above the water line.
In some embodiments, step S201, acquiring a water level detection signal within a preset time period of the water level detection device includes: and acquiring water level detection signals in a preset time period of the main detection device and water level detection signals in preset time periods of the N sub detection devices. Namely, the water level detection signals of the main detection device and the water level detection signals of the N sub detection devices are required to be acquired in a preset time period.
Step S202, self-learning is carried out according to a water level detection signal in a preset time period, and a judgment value of water level detection is obtained.
It should be noted that, the self-learning is generally performed on the water level detection signal in the preset time period, and after the multi-learning, if the obtained values of the water level detection in the multi-learning are not different greatly (i.e. the error of the values of the water level detection in the multi-learning is within the error range), the judgment value of the corresponding sub-detection device is obtained, i.e. the average value of the consistent water level detection values obtained in the multi-learning is taken; otherwise, the learned value is cleared and the learning is resumed.
As shown in fig. 1, in the embodiment of the present invention, a water line in a water tank 100 includes: the first water line, the second water line, … …, and the nth water line, therefore, when performing water level determination, N water level determinations are needed, and therefore, in the embodiment of the present invention, the determination values of water level detection include: the first judgment value, the second judgment value, … … and the N judgment value are N judgment values in total.
In some embodiments, performing self-learning according to a water level detection signal within a preset time period, and obtaining a judgment value of water level detection includes: judging whether continuously receiving the continuously-changed water level detection signals of the main detection device and the continuously-changed water level detection signals of any one of the N sub-detection devices according to the water level detection signals of the main detection device in the preset time period and the water level detection signals of the N sub-detection devices in the preset time period; if the continuously-changing water level detection signal of the main detection device and the continuously-changing water level detection signal of any one of the N sub-detection devices are continuously received, continuously monitoring the moment when the water level detection signal output by the sub-detection device is not changed; if the water level detection signals output by the sub-detection devices are not changed and the water level detection signals continuously output by the main detection devices are kept changed, the sub-detection devices and the main detection devices are continuously monitored and kept for a second duration, and the induction value and the first duration of the sub-detection devices at the current moment are recorded.
The current time is the time when the water level detection signal output by the sub detection device is unchanged and the water level detection signal output by the main detection device is kept changed. The first duration is: continuously outputting a continuously changing water level detection signal from any one of the main detection device and the N sub detection devices to a time period of a current moment when the water level detection signal output by the sub detection device is not changed. The second duration is a period of time after the sub-detection means starts from the current time. Generally, the second duration is short, and the specific duration may be determined according to the actual application.
The sensing value of the sub-detection device at the current moment is a judging value of water level detection of the position of the sub-detection device.
Further, in the embodiment of the present invention, in the continuous change process of the first duration, the main detection device and the sub detection device continuously change in the same direction, for example, the water level detection signals of the main detection device and the sub detection device are continuously increased, or the water level detection signals of the main detection device and the sub detection device are continuously decreased.
For example, the determination value of the first water line is described as follows:
And monitoring the water level detection signals of the main detection device and the water level detection signals of the first sub detection device k1 in real time within a preset time period, judging whether the water level detection signals of the main detection device (namely whether the sensing amount of the main detection device is continuously changed) and the water level detection signals of the first sub detection device k1 (namely whether the sensing amount of the first sub detection device k1 is continuously changed) are continuously received within the preset time period, if the continuously changed water level detection signals of the main detection device and the continuously changed water level detection signals of the first sub detection device k1 are continuously received, continuously monitoring until the moment that the output water level detection signals of the first sub detection device k1 are not changed (namely, the sensing amount of the first sub detection device k1 is not changed), and at the moment that the main detection device still keeps outputting the continuously changed water level detection signals (namely, the sensing amount of the main detection device is continuously changed), recording the sensing value of the first sub detection device k1 at the current moment, and recording the time period from the moment that the continuously changed water level detection signals are continuously outputted by the main detection device k1 to the first sub detection device k1 as the continuously changed first sub detection device. The sensing value of the first sub-detecting device k1 recorded at the current moment is a judging value of the first water line, that is, a judging value of the first water level detecting device k1 for detecting the water level of the first water line. And continuously monitoring the second duration after the first sub-detecting means k1 no longer outputs the water level detection signal.
Setting a preset time period as T1, a first duration as T2 and a current time as T When (when) And a second duration t3. The time variation schematic is shown in fig. 3. Then when at T When (when) At this point in time, the sensing quantity of the first sub-detecting means k1 is no longer changed, but T When (when) Then the sensing quantity of the main detection device continues to change, the sensing quantity of the first sub-detection device k1 and the sensing quantity of the main detection device are continuously monitored, and the time T3 is kept, if the sensing quantity of the first sub-detection device k1 does not change any more in the time T3 period, and the sensing quantity of the main detection device continues to change, the first sub-detection device k1 is recorded in the time T When (when) The sensing value at the time is denoted as K1 (first judgment value).
As another example, the determination value of the second water line is described as follows:
and if the continuously-changed water level detection signal of the main detection device and the continuously-changed water level detection signal of the second sub detection device k2 are continuously received, the continuously-changed water level detection signal of the main detection device (i.e. whether the sensing amount of the main detection device is continuously changed) and the continuously-changed water level detection signal of the second sub detection device k2 are continuously received, the continuously-changed water level detection signal of the main detection device and the continuously-changed water level detection signal of the second sub detection device k2 are continuously monitored until the output water level detection signal of the second sub detection device k2 is not changed (i.e. the sensing amount of the second sub detection device k2 is not changed), and at the moment, the continuously-changed water level detection signal of the main detection device is still kept to be output (i.e. the sensing amount of the main detection device is continuously changed), the sensing value of the second sub detection device k2 at the current moment is recorded, and the continuously-changed water level detection signal of the current moment when the continuously-changed water level detection signal of the main detection device k2 is continuously-changed in the preset time period is recorded as the continuously-changed water level detection signal of the second sub detection device k 2. The sensing value of the second sub-detecting device k2 recorded at the current moment is a judging value of the second water line, that is, the judging value of the second sub-detecting device k2 for detecting the water level of the second water line. And continuously monitoring the second duration after the second sub-detection means k2 no longer outputs the varied water level detection signal
Setting a preset time period as T1, a first duration as T2 and a current time as T When (when) And a second duration t3. Then when at T When (when) At this time, the sensing amount of the second sub-detecting means k2 is not changed any more, but T When (when) Then the induction quantity of the main detection device continues to change, the induction quantity of the second sub detection device k2 and the induction quantity of the main detection device continue to be monitored, and the time t3 is kept, if the induction quantity of the second sub detection device k2 does not change any more in the time t3 period, the induction quantity of the main detection device continues to change,record the second sub-detection means k2 at T When (when) The sensed value at the time is denoted as K2 (second judgment value).
Similarly, the determination value of the nth water line is described as an example:
the method comprises the steps of monitoring a water level detection signal of a main detection device and a water level detection signal of an Nth sub detection device kN in real time within a preset time period, judging whether the continuously-changed water level detection signal of the main detection device (namely whether the sensing amount of the main detection device is continuously changed) and the continuously-changed water level detection signal of the Nth sub detection device kN (namely whether the sensing amount of the Nth sub detection device is continuously changed) are continuously received within the preset time period, continuously monitoring until the output water level detection signal of the Nth sub detection device kN is unchanged (namely, the sensing amount of the Nth sub detection device kN is not changed), recording the sensing value of the Nth sub detection device kN at the current moment when the continuously-changed water level detection signal of the main detection device and the Nth sub detection device is continuously-changed within the preset time period until the continuously-changed water level detection signal of the current moment when the continuously-changed water level detection signal of the main detection device and the Nth sub detection device is continuously-changed. The sensing value of the nth sub-detecting device kN recorded at the current moment is the judging value of the nth water line, namely the judging value of the nth sub-detecting device kN for detecting the water level of the nth water line. And continuously monitoring the second duration after the Nth sub-detection device kN no longer outputs the water level detection signal.
Setting a preset time period as T1, a first duration as T2 and a current time as T When (when) And a second duration t3. Then when at T When (when) At the moment, the induction quantity of the Nth sub-detection device kN is not changed any more, but T is When (when) Then the induction quantity of the main detection device continuously changes, the induction quantity of the Nth sub-detection device kN and the induction quantity of the main detection device are continuously monitored, the time t3 is kept, and if the induction quantity of the Nth sub-detection device kN is within the time t3 periodThe sensing quantity of the main detection device is kept to be changed without changing any more, and the Nth sub-detection device kN is recorded at T When (when) The sensed value at the time is denoted as KN (nth judgment value).
Further, after obtaining K1, K2, … …, KN, K1, K2, … …, KN are saved for direct recall in subsequent water level detection. Of course, it is understood that the values of K1, K2, … …, KN are automatically relearned and updated and saved each time the water level detection is performed, when the water level change in the water tank 100 satisfies the above-described conditions.
Further, in some embodiments, when the water level change in the water tank 100 satisfies the above condition and the K1, K2, … …, KN values are automatically relearned at the time of water level detection, the average value is generally taken for update preservation. Specifically, taking K1 as an example, if the value of K1 is learned for 5 consecutive times and the learned value for 5 consecutive times is equivalent (i.e., the range of 5 consecutive times is within the error range), the average value of 5 consecutive times is taken and stored in the memory as the judgment value of the first water line during water level detection; if the deviation of the value obtained in any one of the 5 consecutive times is larger (exceeds the error range), the operation is continued until the value learned in the next 5 consecutive times is equivalent, and then the average value is taken and stored in a memory to be used as the judgment value of the first water level line during water level detection. Similarly, the principles for K2, K3, … …, KN are the same as for K1.
Optionally, the preset time period is less than or equal to the first duration time and the second duration time. I.e. t1 is less than or equal to t2+t3. Wherein the first duration t1 is greater than or equal to a first threshold; the second duration is greater than or equal to a second threshold. Optionally, the first threshold is greater than 7 seconds; the second threshold is greater than 2 seconds.
Step S203, a reference value of water level detection is obtained according to the judgment value of water level detection and the error value of the water level detection device.
In some embodiments, the determination of the water level detection includes: n judgment values of N water lines. The reference values include: first and second reference values for the N water lines.
In some embodiments, obtaining the reference value of the water level detection according to the judgment value of the water level detection and the error value of the water level detection device includes: subtracting the judgment value of each water line from the first error value to obtain a difference value of the judgment value of the water line and the first error value; the difference value between the judging value and the first error value of the water line is a first reference value of the water line; adding the judgment value of each water line with the second error value to obtain the sum value of the judgment value of the water line and the second error value; the sum of the judgment value and the second error value of the water level line is a second reference value of the water level line.
Specifically, let the first error value be dk1 and the second error value be dk2; the judgment value of the first water line is K1, the judgment value of the second water line is K2 and … …, the judgment value of the N water line is KN, and then:
first reference value of first water line: k11 Label (C) =k1-dk1, second reference value of first water line: k12 Label (C) ＝K1+dk2。
First reference value of second water line: k21 Label (C) =k2-dk1, second reference value of second water line: k22 Label (C) ＝K2+dk2。
And so on:
first reference value of nth water line: KN1 Label (C) Second reference value of N-th water line=kn-dk1: KN2 Label (C) ＝KN+2dk。
Step S204, acquiring a real-time detection signal of the water level detection device.
In some embodiments, the real-time detection signal of the water level detection device includes: real-time detection signal K of main detection device Real world Real-time detection signal K of first sub-detection device K1 1 practice of Real-time detection signal K of second sub-detection device K2 2 reality … …, real-time detection signal K of Nth sub-detection device kN N real 。
Step S205, determining the water level information of the coffee machine according to the real-time detection signal and the reference value.
In some embodiments, determining water level information for the coffee machine based on the real-time detection signal and the reference value comprises: comparing the real-time detection signal of each sub-detection device with the first reference value and the second reference value of the corresponding water level line; if the real-time detection signal of the sub-detection device is larger than the first reference value of the corresponding water level line, the water level of the sub-detection device is below the set water level line; if the real-time detection signal of the sub-detection device is smaller than the second reference value of the corresponding water line, the water level is above the set water line of the sub-detection device. The set water level line comprises a first water level line, a second water level line, a … … water level line and an Nth water level line.
Specifically, if the real-time detection signal of the first sub-detection device k1 is detected, the real-time detection signal of the first sub-detection device k1 is compared with a first reference value and a second reference value of the first water line, if the real-time detection signal of the first sub-detection device k1 is greater than the first reference value of the first water line, the water level is determined to be below the first water line, and if the real-time detection signal of the first sub-detection device k1 is less than the second reference value of the first water line, the water level is determined to be above the first water line, which can be expressed by the following formula:
if K1 Real world > K1-dk1, determining that the water level is below the first water line; if K1 Real world < K1+dk2, it is determined that the water level is above the first water line.
Similarly, if the real-time detection signal of the second sub-detection device k2 is detected, comparing the real-time detection signal of the second sub-detection device k2 with the second reference value and the second reference value of the second water line, if the real-time detection signal of the second sub-detection device k2 is greater than the second reference value of the second water line, determining that the water level is below the second water line, and if the real-time detection signal of the second sub-detection device k2 is less than the second reference value of the second water line, determining that the water level is above the second water line can be expressed by the following formula:
If K2 Real world > K2-dk1, determining that the water level is below the second water line; if K2 Real world And < K2+dk2, then the water level is determined to be above the second water line.
And by analogy, if the real-time detection signal of the Nth sub-detection device kN is detected, comparing the real-time detection signal of the Nth sub-detection device kN with the Nth reference value and the Nth reference value of the Nth water line, if the real-time detection signal of the Nth sub-detection device kN is larger than the Nth reference value of the Nth water line, judging that the water level is below the Nth water line, and if the real-time detection signal of the Nth sub-detection device kN is smaller than the Nth reference value of the Nth water line, judging that the water level is above the Nth water line, wherein the formula can be expressed as:
if KN Real world If the water level is more than KN-dk1, judging that the water level is below the Nth water level line; if KN Real world And < KN+dk2, the water level is determined to be above the Nth water level.
Further, in some embodiments, the self-learning water level detection method of the coffee machine further includes: outputting water level information of the coffee machine, displaying the water level, and/or outputting control signals and/or early warning signals according to the water level information of the coffee machine. Optionally, the control signals include, but are not limited to, stop water control signals, start water control signals, and early warning control signals. The early warning signals include, but are not limited to, display early warning signals, light early warning signals, alarm early warning signals. For example, when the water level of the water tank 100 is above or below the first water level, it is indicated that the water in the water tank 100 has reached the vicinity of the upper water level, at this time, the control unit outputs a control signal for stopping water injection, stopping water injection into the water tank 100, avoiding overflow, and sending an overflow early warning signal by means of lamplight flashing, buzzer alarm, etc.; or, when the water level of the water tank 100 is above or below the nth water level, it indicates that the water in the water tank 100 is very little, at this time, water needs to be injected into the water tank 100 in time, and the control unit outputs a start water injection signal to inject water into the water tank 100, so as to avoid dry burning of the coffee machine, and meanwhile, the control unit can send out a dry burning early warning signal in a light flashing mode, a buzzer mode and the like.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same according to the content of the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made with the scope of the claims should be covered by the claims.
Claims (12)
1. A self-learning water level detection method for a coffee machine, characterized in that the coffee machine comprises: a water tank, a water level detection device arranged outside the water tank to detect water level information in the water tank; the water level detection apparatus includes: a main detection device and N sub-detection devices; the N sub-detection devices are adjacently arranged along the axis direction of the water tank, a first sub-detection device of the N sub-detection devices is arranged close to the top of the water tank, and an Nth sub-detection device of the N sub-detection devices is arranged close to the bottom of the water tank; the main detection device comprises a main body part and a plurality of convex parts which are arranged at intervals; the plurality of convex parts are inserted between two adjacent sub-detection devices, a first convex part of the plurality of convex parts is arranged between the first sub-detection device and the second sub-detection device, and a last convex part of the plurality of convex parts is arranged below the Nth sub-detection device; the self-learning water level detection method of the coffee machine comprises the following steps:
Acquiring a water level detection signal of the water level detection device in a preset time period;
self-learning is carried out according to the water level detection signal in the preset time period, and a judgment value of water level detection is obtained;
obtaining a reference value of water level detection according to the judgment value of the water level detection and the error value of the water level detection device; the judgment value of the water level detection comprises: n judgment values of N water level lines; the reference values include: first and second reference values for the N water lines; the error value of the water level detection device comprises: a first error value and a second error value; the first error value is less than or equal to the second error value;
the obtaining the reference value of the water level detection according to the judgment value of the water level detection and the error value of the water level detection device comprises the following steps: subtracting the judgment value of each water line from the first error value to obtain a difference value of the judgment value of the water line and the first error value; the difference value between the judging value of the water level line and the first error value is a first reference value of the water level line; adding the judgment value of each water line with the second error value to obtain the sum value of the judgment value of the water line and the second error value; the sum of the judging value of the water level line and the second error value is a second reference value of the water level line;
Acquiring a real-time detection signal of the water level detection device;
determining water level information of the coffee machine according to the real-time detection signal and the reference value;
said determining water level information of said coffee machine from said real-time detection signal and said reference value comprises: comparing the real-time detection signal of each sub-detection device with the first reference value and the second reference value of the corresponding water level line; if the real-time detection signal of the sub-detection device is larger than the first reference value of the corresponding water level line, the water level of the sub-detection device is below the set water level line; if the real-time detection signal of the sub-detection device is smaller than the second reference value of the corresponding water line, the water level is above the set water line of the sub-detection device.
2. The method of claim 1, wherein the acquiring the water level detection signal within a preset time period of the water level detection device comprises:
and acquiring water level detection signals in a preset time period of the main detection device and water level detection signals in preset time periods of the N sub-detection devices.
3. The method for detecting the self-learning water level of the coffee machine according to claim 2, wherein the self-learning according to the water level detection signal within the preset time period, the obtaining of the judgment value of the water level detection comprises:
Judging whether the continuously-changed water level detection signals of the main detection device and the continuously-changed water level detection signals of any one of the N sub-detection devices are continuously received according to the water level detection signals of the main detection device in the preset time period and the water level detection signals of the N sub-detection devices in the preset time period;
if the continuously-changing water level detection signal of the main detection device and the continuously-changing water level detection signal of any one of the N sub-detection devices are continuously received, continuously monitoring the moment when the water level detection signal output by the sub-detection device is not changed;
if the water level detection signal output by the sub-detection device is not changed and the water level detection signal output by the main detection device is kept changed, continuing to monitor the sub-detection device and the main detection device and keeping the second duration;
recording the induction value and the first duration of the sub-detection device at the current moment;
the current moment is the moment when the water level detection signal output by the sub-detection device is unchanged and the water level detection signal output by the main detection device is kept changed; the first duration is: outputting a continuously-changing water level detection signal from any one of the main detection device and the N sub-detection devices to a time period at a current moment when the water level detection signal output by the sub-detection device is not changed; the second duration is a period of time from the current moment to the back of the sub-detection device;
The sensing value of the sub-detection device at the current moment is the judging value of water level detection of the position of the sub-detection device.
4. A coffee machine self-learning water level detection method according to claim 3, characterized in that said preset time period, said duration and said current moment satisfy:
the preset time period is less than or equal to the first duration time and the second duration time;
the first duration is greater than or equal to a first threshold; the second duration is greater than or equal to a second threshold.
5. The method for detecting the self-learning water level of a coffee machine according to claim 1, wherein the acquiring the water level detection signal within the preset time period of the water level detection device comprises:
and adjusting the induction parameters of the main detection device and the induction parameters of any one of the N sub-detection devices to control the water level to be equivalent to the induction variation of the main detection device in the descending process of the induction area of any one of the N sub-detection devices.
6. The coffee machine self-learning water level detection method of claim 1, further comprising:
Before water level detection, acquiring an empty water state sensing value and a full water state sensing value of the water level detection device by adjusting the sensitivity of the water level detection device;
based on the empty water state sensing value and the full water state sensing value, a change threshold of the water level detection device is obtained;
and determining an error value of the water level detection device according to the change threshold value of the water level detection device.
7. The method for detecting the self-learning water level of a coffee machine according to claim 1, wherein the N sub-detecting devices are elongated, and the length direction of the elongated is parallel to the horizontal plane of the water tank.
8. The coffee machine self-learning water level detection method of claim 1, further comprising:
outputting water level information of the coffee machine;
and/or outputting a control signal and/or an early warning signal according to the water level information of the coffee machine.
9. A coffee machine employing the coffee machine self-learning water level detection method of claim 1, characterized by comprising a water tank, a water level detection device provided outside the water tank to detect water level information in the water tank, and a control unit connected to the water level detection device, the control unit being configured to:
Acquiring a water level detection signal of the water level detection device in a preset time period;
self-learning is carried out according to the water level detection signal in the preset time period, and a judgment value of water level detection is obtained;
obtaining a reference value of water level detection according to the judgment value of the water level detection and the error value of the water level detection device;
acquiring a real-time detection signal of the water level detection device;
and determining the water level information of the coffee machine according to the real-time detection signal and the reference value.
10. A coffee machine according to claim 9, wherein the water level detection means comprise: a main detection device and N sub-detection devices;
the N sub-detection devices are adjacently arranged along the axis direction of the water tank, a first sub-detection device of the N sub-detection devices is close to the top of the water tank, and an Nth sub-detection device of the N sub-detection devices is close to the bottom of the water tank.
11. The coffee machine of claim 10, wherein the main detecting means includes a main body portion, and a plurality of protruding portions disposed at intervals;
the plurality of protruding parts are inserted between two adjacent sub-detection devices, a first protruding part of the plurality of protruding parts is arranged between the first sub-detection device and the second sub-detection device, and a last protruding part of the plurality of protruding parts is arranged below the Nth sub-detection device.
12. The coffee machine of claim 10, wherein the N sub-detecting devices are each elongated, and a length direction of the elongated is parallel to a horizontal plane of the water tank.
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