Measurement method and measurement module for milk storage amount, milk pumping device and milk pumping suite

Abstract

The invention discloses a milk storage amount measuring method, a measuring module, a milk sucking device and a milk sucking kit. The milk storage amount measuring method comprises the following steps: acquiring a plurality of distance values arranged in a time sequence, and determining a characteristic distance value in the plurality of distance values; calculating a difference value between the characteristic distance value and a preset calibration distance value to obtain a first deviation value; performing calibration processing on the current latest distance value by using the first deviation value to obtain a current calibration distance value; and obtaining a volume value corresponding to the current calibration distance value as the current milk storage amount of the milk storage bin. By means of the mode, the accuracy of measuring the milk storage amount of the milk sucking device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of maternal and infant products, and in particular to a method for measuring stored milk volume, a measuring module, a milk pumping device, and a milk pumping kit. Background Art

[0002] With the development of science and technology and people's pursuit of quality of life, various humanized products have begun to appear to meet users' life needs. Among them, the emergence of breast pumps makes breastfeeding more convenient. The breast pump is used to extract breast milk and store the extracted breast milk in a milk storage bin, so that the baby can eat it when needed.

[0003] In the process of sucking breast milk, it is inconvenient for the user to directly observe the amount of milk stored in the milk storage bin. At present, the method for measuring the amount of milk stored in the milk storage bin in the prior art has low accuracy and cannot meet the use needs of users. Summary of the invention

[0004] The main technical problem solved by the present application is to provide a method for measuring the amount of stored milk, a measuring module, a milk suction device and a milk suction kit, which can improve the accuracy of the milk suction device in measuring the amount of stored milk.

[0005] In order to solve the above technical problems, the first technical solution adopted in the present application is: to provide a method for measuring the amount of milk storage, including: obtaining multiple distance values ​​arranged in time series, and determining a characteristic distance value among the multiple distance values; calculating the difference between the characteristic distance value and a preset calibration distance value to obtain a first offset value; using the first offset value to calibrate the current latest distance value to obtain the current calibrated distance value; obtaining the volume value corresponding to the current calibrated distance value as the current milk storage amount of the milk storage bin.

[0006] To solve the above technical problems, the second technical solution adopted by the present application is: providing a measuring module, the measuring module comprising a light emitting component, a light receiving component and a first processor. The light emitting component is used to emit measuring light, and the light receiving component is used to receive the reflected measuring light. The first processor is coupled to both the light emitting component and the light receiving component. The first processor is used to execute a computer program to implement the method provided by the first technical solution.

[0007] To solve the above technical problems, the third technical solution adopted by the present application is: to provide a milk suction device, the milk suction device includes a milk storage bin, a measuring module provided by the second technical solution, a second processor and a memory. The second processor and the memory are respectively coupled to the first processor. The measuring module is used to measure the amount of milk stored in the milk storage bin. The second processor is used to control the measuring module to measure the amount of milk stored in the milk storage bin. The memory stores a computer program.

[0008] In order to solve the above technical problems, the fourth technical solution adopted by the present application is: to provide a milk pumping kit, which includes the milk pumping device and the charging chamber provided by the third technical solution. The milk pumping device is provided with a first electrical connector. The charging chamber is provided with a coupled second electrical connector and a weight sensor. The second electrical connector is used to connect with the first electrical connector, so that the charging chamber charges the milk pumping device. The weight sensor is used to be triggered by the connection between the second electrical connector and the first electrical connector, so as to measure the weight of the milk pumping device.

[0009] The beneficial effects of the present application are as follows: different from the prior art, by acquiring multiple distance values ​​arranged in time series, a characteristic distance value is determined from the multiple distance values, the difference between the characteristic distance value and a preset calibration distance value is calculated to obtain a first offset value, the current latest distance value is calibrated using the first offset value to obtain the current calibration distance value, and the volume value corresponding to the current calibration distance value is obtained as the current milk storage volume of the milk storage bin, the first offset value is the difference between the characteristic distance value and the preset calibration distance value, the characteristic distance value varies with different breast milk, the first offset value can reflect the influence of the characteristics of breast milk itself on the measurement result, compared with the distance value, the current calibration distance value can more accurately reflect the actual liquid level distance, and the distance value can be calibrated using the first offset value to reduce the measurement error caused by the characteristics of breast milk itself, thereby improving the accuracy of the volume measurement of breast milk sucked by the milk pumping device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic structural diagram of an embodiment of a breast pumping device of the present application;

[0011] Figure 2 This is a flow chart of an embodiment of a method for measuring milk storage amount of the present application;

[0012] Figure 3 This is another flow chart of an embodiment of the method for measuring the amount of stored milk in the present application;

[0013] Figure 4 This is a schematic diagram comparing the distance values ​​measured by the measuring modules of different breast pumping devices of the present application with the actual distances, wherein: Figure 4 The plotting data are from Table 2;

[0014] Figure 5 This is a schematic diagram comparing the current calibration distance value and the actual distance obtained by the measurement modules of different breast pumping devices of this application, wherein: Figure 5 The plotting data are from Table 3;

[0015] Figure 6 This is a schematic diagram of the corresponding relationship between light energy value and distance value when fog exists, where: Figure 6 The plotting data are from Table 4;

[0016] Figure 7 This is a schematic diagram of the corresponding relationship between the light energy value and the distance value when there is no fog, where: Figure 7 The plotting data are from Table 5;

[0017] Figure 8 This is a schematic block diagram of the circuit structure of an embodiment of the breast pumping kit of the present application;

[0018] Fig. 9 A schematic diagram of calibrating an empty milk storage bin for the embodiment of the breast pumping device of the present application;

[0019] Fig.10 This is a schematic diagram of the structure of an embodiment of a breast pump kit of the present application. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] After long-term research, the inventors found that it is inconvenient for users to directly observe the amount of milk stored in the milk storage bin during the process of sucking breast milk. At present, the method for measuring the amount of milk stored in the milk storage bin in the prior art is of low accuracy and cannot meet the needs of users. In order to solve the above technical problems, the present application provides the following embodiments.

[0022] like Figure 1 As shown, the breast pumping device 100 described in the embodiment of the breast pumping device of the present application includes a milk storage bin 120 and a measuring module 110. The breast pumping device 100 is used to extract breast milk and store the extracted breast milk in the milk storage bin 120, so that the baby can eat it when needed. During the process of extracting breast milk, it is not convenient for the user to directly observe the amount of milk stored in the milk storage bin 120. The measuring module 110 can be used to measure the amount of milk stored in the milk storage bin 120 in real time.

[0023] like Figure 2 and Figure 3 As shown, the measurement method described in the embodiment of the method for measuring the amount of milk stored in the present application includes: S100: obtaining a plurality of distance values ​​arranged in a time series, and determining a characteristic distance value from the plurality of distance values. S400: calculating the difference between the characteristic distance value and the preset calibration distance value to obtain a first offset value. S500: using the first offset value to calibrate the current latest distance value to obtain the current calibration distance value. S600: obtaining a volume value corresponding to the current calibration distance value as the current amount of milk stored in the milk storage bin.

[0024] The measuring module can emit measuring light to the liquid surface of the milk storage tank, and the measuring light can be reflected by the liquid surface and then received by the measuring module again. The measuring module can calculate the distance between the measuring module and the liquid surface according to the received light, so as to obtain the distance value. During the process of sucking breast milk, the liquid surface continues to rise, and the distance between the measuring module and the liquid surface continues to decrease, so that multiple distance values ​​arranged in time sequence can be obtained.

[0025] The measurement light can be expressed as photons at the microscopic level. During the working process of the measurement module, in addition to the reflection of photons by the breast milk surface, the transmission, scattering or refraction of photons in the breast milk may also occur, resulting in the distance value not being able to reflect the actual liquid surface distance. For example, some photons can be absorbed by breast milk. For another example, when the amount of breast milk is small, photons can pass through the breast milk to reach the bottom wall of the milk storage bin, and be received by the measurement module through reflection from the bottom wall of the milk storage bin. Therefore, it is necessary to calibrate the distance value using the first offset value to obtain the current calibrated distance value. The first offset value can reflect the influence of the characteristics of breast milk itself on the measurement results. Compared with the distance value, the current calibrated distance value can more accurately reflect the actual liquid surface distance.

[0026] According to the preset parameters of the breast pump device, the current calibration distance value can be converted to a corresponding volume value, which can be used to represent the volume of breast milk in the milk storage bin, that is, the storage milk volume. The unit of the volume value can be milliliters, ounces, etc.

[0027] The first offset value is the difference between the characteristic distance value and the preset calibration distance value. The characteristic distance value varies with the characteristics of breast milk itself, so the first offset value can reflect the impact of the characteristics of breast milk itself on the measurement result. Calibration of the distance value using the first offset value can reduce the measurement error caused by the characteristics of breast milk itself.

[0028] By acquiring multiple distance values ​​arranged in time series, determining a characteristic distance value from the multiple distance values, calculating the difference between the characteristic distance value and a preset calibration distance value to obtain a first offset value, using the first offset value to calibrate the current latest distance value to obtain the current calibration distance value, and obtaining a volume value corresponding to the current calibration distance value as the current milk storage capacity of the milk storage bin. The first offset value is the difference between the characteristic distance value and the preset calibration distance value. The characteristic distance value varies with different breast milk. The first offset value can reflect the influence of the characteristics of breast milk itself on the measurement result. Compared with the distance value, the current calibration distance value can more accurately reflect the actual liquid level distance. Using the first offset value to calibrate the distance value can reduce the measurement error caused by the characteristics of breast milk itself, thereby improving the accuracy of the volume measurement of breast milk sucked by the milk pumping device.

[0029] The following is a detailed description of an embodiment of the method for measuring the amount of milk storage in the present application.

[0030] S100: Acquire a plurality of distance values ​​arranged in time series, and determine a characteristic distance value from the plurality of distance values.

[0031] The distance value is used to reflect the distance between the liquid level of breast milk and the measuring module during the milking process. The liquid level distance can represent the distance between the liquid level of breast milk and the measuring module, or the distance between the liquid level of breast milk and other components of the milking device that are fixed relative to the measuring module. As the milking process proceeds, multiple distance values ​​are acquired in chronological order.

[0032] Optionally, a plurality of distance values ​​arranged in time series are obtained, and a characteristic distance value is determined from the plurality of distance values. For details, reference may be made to step S101 and step S200 included in step S100:

[0033] S101: emitting a measuring light beam to the liquid surface of the milk storage bin to measure the liquid surface distance, and obtaining a plurality of distance values ​​arranged in time sequence.

[0034] Optionally, a measuring light is emitted to the liquid surface of the milk storage bin to measure the liquid surface distance, and a plurality of distance values ​​arranged in time sequence are obtained. For details, refer to the following steps included in step S101:

[0035] S102: Using a ToF sensor to emit a measurement light to the liquid surface to measure the liquid surface distance to obtain a plurality of distance values.

[0036] ToF is the abbreviation of Time of Flight. ToF sensors can measure distance by the time of flight of photons. Specifically, ToF sensors can emit and receive photons, and can calculate the time difference between the emitted and returned photons, that is, calculate the time of flight (ToF). Furthermore, ToF sensors can emit infrared light as measurement light.

[0037] Optionally, a plurality of distance values ​​arranged in time sequence are obtained, and specific reference may be made to the following steps included in step S100:

[0038] S110: Determine one distance value among the plurality of distance values ​​at each second time interval, and determine a plurality of distance values ​​after a plurality of second time intervals.

[0039] The second time interval may be a time interval for the milk sucking device to read the amount of milk stored. Every time the second time interval passes, a distance value may be determined, so that the amount of milk stored may be read once. For example, the second time interval may be 10 seconds. Every time 10 seconds pass, a distance value is determined, so that the amount of milk stored may be read once. After a period of time, multiple distance values ​​may be determined, so that the amount of milk stored may be read multiple times. In Tables 1 to 5, the time interval between two adjacent distance values ​​is the second time interval.

[0040] Optionally, determining a distance value among the multiple distance values ​​may specifically refer to the following steps included in step S110:

[0041] S111: Calculate an initial average value based on the light reflection information every first time interval, wherein the light reflection information is obtained by emitting a measurement light to the liquid surface of the milk storage bin.

[0042] The initial average value may reflect the average liquid level distance in the time period corresponding to the first time interval. For example, if the first time interval is 1 second, the initial average value may reflect the average liquid level distance in the corresponding 1 second.

[0043] During the milking process, the liquid surface is often not flat due to shaking, or the liquid surface is tilted due to shaking, which causes measurement errors. By calculating the initial average value corresponding to the first time interval, the measurement error caused by the shaking and shaking of the liquid surface can be reduced, so that the measurement result is closer to the actual liquid surface distance.

[0044] Optionally, an initial average value is calculated based on the light reflection information every first time interval, and the details may refer to the following steps included in step S111:

[0045] S1111: Calculate an initial distance value based on the light reflection information every third time interval.

[0046] For example, the third time interval is 200 ms, and an initial distance value may be calculated based on the light reflection information every 200 ms.

[0047] S1112: After obtaining a second preset number of initial distance values, calculating an average value of the initial distance values, and determining the average value of the initial distance values ​​as an initial average value.

[0048] The initial distance value (current_mm) is calculated by the measurement module based on the light reflection information. The initial distance value can reflect the distance between the measurement module and the liquid surface, but due to the shaking of the liquid surface, there is a large error in the distance between the measurement module and the liquid surface reflected by the initial distance. By calculating the average value of the initial distance value, the measurement error caused by the shaking and shaking of the liquid surface can be reduced.

[0049] For example, the second preset number is 5, and the average of the 5 initial distance values ​​is the initial average value. Further, when calculating the average of the 5 initial distance values, a maximum value and a minimum value can be removed first, and the average of the other three initial distance values ​​can be used as the average of the 5 initial distance values. In this way, the measurement error caused by abnormal conditions can be reduced.

[0050] Optionally, an initial distance value is calculated based on the light reflection information every third time interval, and details may refer to the following steps included in step S1111:

[0051] S1113: Before the breast pumping device sucks breast milk, calibrate the empty milk storage bin to obtain a second offset value.

[0052] S1114: Calculate an initial distance value based on the second offset value and the light reflection information.

[0053] The measurement process of the measurement module can also cause errors. For example, for the same brand and model of breast pumping devices, there will be differences between the measurement modules of different breast pumping devices. The characteristics of the measurement module itself will cause the measurement results to be too large or too small. In addition, there is often a light-transmitting baffle between the measurement module and the liquid surface, and the baffle is set between the liquid surface and the measurement module. For example, the wall of the milk storage bin can be used as a baffle between the liquid surface and the measurement module. The light transmittance of the baffles of different breast pumping devices is different, and the influence of the characteristics of the baffle itself on the measurement results needs to be eliminated during the measurement process.

[0054] The measuring module can be used to measure the empty milk storage bin before the breast pumping device sucks breast milk, so as to obtain the measurement error caused by the characteristics of the measuring module itself and the characteristics of the baffle itself, that is, to obtain the second offset value. The initial distance value calculated based on the second offset value can reduce the measurement error caused by the characteristics of the measuring module itself and the characteristics of the baffle itself during the breast pumping process.

[0055] Optionally, before the breast pumping device sucks breast milk, the empty milk storage bin is calibrated to obtain a second offset value, and the details may refer to the following steps included in step S1113:

[0056] S1115: Obtain light reflection information of the empty milk storage bin and obtain a third preset number of empty distance values ​​based on the light reflection information, wherein the empty distance value represents the distance between the measuring module and the bottom wall of the milk storage bin measured by the measuring module.

[0057] The measuring module can emit measuring light to the bottom wall of the milk storage bin of the empty milk sucking device. After the measuring light is reflected by the bottom wall of the milk storage bin, the measuring module can obtain light reflection information. The measuring module can calculate the empty distance value according to the light reflection information. Due to the measurement error caused by the characteristics of the measuring module itself and the characteristics of the baffle itself, the empty distance value cannot accurately reflect the actual distance between the measuring module and the bottom wall of the milk storage bin.

[0058] For example, the third preset number may be 50. That is, when the milk storage bin is in an empty state, the measuring module obtains 50 empty distance values ​​through measurement.

[0059] S1116: Calculate the difference between each empty distance value and the preset empty distance value to obtain a third preset number of initial offset values. The preset empty distance value represents a preset distance from the measuring module to the bottom wall of the milk storage bin. The preset empty distance value may be an actual distance from the measuring module to the bottom wall of the milk storage bin.

[0060] S1117: Calculate an average value of a third preset number of initial offset values, and determine the average value of the third preset number of initial offset values ​​as a second offset value.

[0061] The initial offset value represents the measurement error caused by the characteristics of the measurement module itself and the characteristics of the baffle itself during a single measurement. By determining the average value of the third preset number of initial offset values ​​as the second offset value, the measurement error caused by the characteristics of the measurement module itself and the characteristics of the baffle itself can be more accurately reflected.

[0062] For example, the third preset number may be 50. That is, when the milk storage bin is in an empty state, the measurement module measures 50 initial offset values. The average value of the 50 initial offset values ​​may be determined as the second offset value.

[0063] S112: After obtaining the first preset number of initial average values, calculating the average value of the initial average values.

[0064] S113: Determine an average value of the initial average values ​​as a distance value among the multiple distance values.

[0065] For example, the first preset number may be 10, and the measurement module may determine the average of the 10 initial average values ​​as one of the multiple distance values. Further, when calculating the average of the 10 initial average values, a maximum value and a minimum value may be removed first, and the average of the other 8 initial distance values ​​may be used as the average of the 10 initial distance values. In this way, the measurement error caused by abnormal conditions may be reduced.

[0066] By determining the average of the first preset number of initial average values ​​as a distance value, measurement errors can be reduced, and it is easier to determine whether multiple distance values ​​meet the preset conditions, so that the characteristic distance value can be found more accurately. The average of the initial average values ​​can be represented by agv_mm.

[0067] Optionally, the average value of the initial average values ​​is determined as a distance value among the multiple distance values. For details, refer to the following steps included in step S113:

[0068] S1131: Calculate the difference between the average value of the initial average value and the initial average value, and use the difference between the two as the actual fluctuation value.

[0069] S1132: Compare the actual fluctuation value with the preset fluctuation threshold.

[0070] S1133: If the actual fluctuation value is less than the preset fluctuation threshold, the average value of the initial average values ​​is determined as a distance value among the multiple distance values.

[0071] S1134: If the actual fluctuation value is greater than or equal to the preset fluctuation threshold, a first prompt message is issued to prompt the user that the jitter is large.

[0072] During the milking process, the liquid level may be unstable due to the shaking and jittering of the milking device, causing the liquid level distance measured by the measurement module to fluctuate greatly. The actual fluctuation value can be used to reflect the stability of the liquid level over a period of time. The smaller the actual fluctuation value, the higher the stability of the liquid level, and the more accurate the measurement result of the liquid level distance. The larger the actual fluctuation value, the higher the volatility of the liquid level, and the lower the accuracy of the measurement result of the liquid level distance.

[0073] The preset fluctuation threshold value may be used to indicate the maximum value of the actual fluctuation value within an acceptable range. For example, the preset fluctuation threshold value is 5 mm. If the actual fluctuation value is less than 5 mm, the average value of the initial average value is determined as one of the multiple distance values. If the actual fluctuation value is greater than or equal to 5 mm, a first prompt message is issued to prompt the user that the shaking is large. The user may reduce the shaking and shaking of the breast pump device according to the first prompt message, so that the measurement module may obtain more accurate measurement results in subsequent measurements. Furthermore, the absolute value of the difference between the average value of the initial average value and the initial average value may be calculated, and the absolute value of the difference between the two may be used as the actual fluctuation value.

[0074] In some embodiments, the preset fluctuation threshold value can be obtained by multiple experiments during the design stage of the breast pump device. In other embodiments, the preset fluctuation threshold value can also be set by the user.

[0075] The first prompt information can be output in various ways, for example, the user can be prompted through a display screen, a speaker, etc. The first prompt information can be in various forms, including images, sounds, texts, numbers, etc. The content of the first prompt information can include the specific shaking condition of the milk pump device, and can also include suggestions for the shaking condition of the milk pump device.

[0076] Optionally, in some embodiments, the initial distance value or the initial average value may be determined as one of the multiple distance values. Optionally, in some embodiments, the second offset value is not calculated, and the initial distance value is calculated by the measurement module based on the light reflection information.

[0077] S200: When it is determined that a plurality of distance values ​​satisfy a preset condition, a characteristic distance value is determined from the plurality of distance values.

[0078] During the process of breastfeeding, the characteristics of breast milk itself can cause measurement errors. For example, the transmission, scattering or refraction of photons in breast milk can cause the distance value to not reflect the actual liquid surface distance. In addition, changes in the color and concentration of breast milk can cause changes in the measurement error, making the measurement error unstable.

[0079] According to the time sequence, multiple distance values ​​often have a certain change pattern. The measurement module can use the change pattern of multiple distance values ​​to determine whether multiple distance values ​​can be calibrated. The premise of being able to calibrate multiple distance values ​​is that the change pattern of multiple distance values ​​meets the preset conditions.

[0080] One of the multiple distance values ​​can be used as a characteristic distance value. In the process of calibrating the multiple distance values, the actual liquid surface distance corresponding to the characteristic distance value is known, so the characteristic distance value can be used as a reference. The difference between the characteristic distance value and the actual liquid surface distance can be calculated first. The difference between the two can be used to reflect the measurement error caused by the characteristics of breast milk itself. The difference between the two can be used to calibrate other distance values ​​in the multiple distance values ​​later.

[0081] In some embodiments, the distance values ​​corresponding to the inflection points where the multiple distance values ​​change from an upward trend to a downward trend can be used as characteristic distance values.

[0082] Optionally, when determining that multiple distance values ​​meet a preset condition, the following steps included in step S200 may be specifically referred to:

[0083] S210: Determine whether the multiple distance values ​​satisfy a preset change trend in time sequence.

[0084] S220: If yes, determine whether the multiple distance values ​​meet the preset conditions.

[0085] S230: If not, it is determined that the multiple distance values ​​do not meet the preset conditions.

[0086] The preset condition may include a preset change trend. If the change rule of the multiple distance values ​​in time series meets the preset change trend, the multiple distance values ​​can be calibrated.

[0087] Optionally, whether the multiple distance values ​​satisfy a preset change trend in time sequence may be determined, for example, by referring to the following steps included in step S210:

[0088] S211: Determine whether the magnitudes of the plurality of distance values ​​first increase and then decrease in time sequence.

[0089] S212: If yes, determine whether the multiple distance values ​​satisfy a preset change trend in time sequence.

[0090] S213: If not, it is determined that the multiple distance values ​​do not satisfy the preset change trend in time sequence.

[0091] During the milking process, as the actual liquid level rises, the actual liquid level distance shows an upward trend. Figure 4 and Figure 5 As shown in the figure, when the amount of milk stored in the milk storage bin increases from zero, due to the transmission, scattering or refraction of photons, the measured distance value shows an upward trend as the actual liquid level rises. When the amount of milk stored in the milk storage bin reaches a certain volume, the reflection effect of the liquid surface on photons becomes obvious, and the measured distance value shows a downward trend as the actual liquid level rises.

[0092] The amount of milk storage corresponding to the inflection point where multiple distance values ​​change from an upward trend to a downward trend is often stable. That is to say, for the measurement module, the actual liquid surface distance corresponding to the inflection point is known, which is the preset calibration distance value. Therefore, the actual liquid surface distance corresponding to the inflection point can be used to calibrate the distance value corresponding to the inflection point among the multiple distance values. The distance value corresponding to the inflection point is the characteristic distance value. Then, the difference between the actual liquid surface distance corresponding to the inflection point and the distance value corresponding to the inflection point can be calculated. The difference between the two can be used to reflect the measurement error caused by the characteristics of breast milk itself. The difference between the two can be used to calibrate other distance values ​​among the multiple distance values.

[0093] If the multiple distance values ​​satisfy the preset change trend, that is, the multiple distance values ​​first increase and then decrease in time series, there are inflection points in the multiple distance values, and the multiple distance values ​​can be calibrated subsequently.

[0094] Optionally, determining a characteristic distance value from a plurality of distance values ​​may specifically refer to the following steps included in step S200:

[0095] S310: Compare the sizes of multiple distance values, and determine the distance value with the largest value as the characteristic distance value.

[0096] In some embodiments, the magnitudes of the multiple distance values ​​first increase and then decrease in time series, so the distance value with the largest value is the turning point where the multiple distance values ​​change from an increasing trend to a decreasing trend, and the distance value with the largest value can be used as a characteristic distance value.

[0097] For example, in Table 1, the characteristic distance value is 77.2 mm. In Table 2, the characteristic distance value of the milk pump 1 is 63 mm, the characteristic distance value of the milk pump 2 is 64.3 mm, and the characteristic distance value of the milk pump 3 is 64.1 mm.

[0098] S400: Calculate the difference between the characteristic distance value and the preset calibration distance value to obtain a first offset value.

[0099] The preset calibration distance value can be used to represent the actual liquid surface distance corresponding to the characteristic distance value, so that the characteristic distance value can be calibrated with the preset calibration distance value as a reference. The first offset value can be used to reflect the measurement error caused by the characteristics of breast milk itself, and the first offset value can be used to calibrate other distance values ​​in the multiple distance values ​​later, thereby reducing the measurement error caused by the characteristics of breast milk itself.

[0100] For example, in Table 1, the preset calibration distance value is 64 mm, and the calculated first offset value is 13.2 mm. In Table 2, the preset calibration distance values ​​of the milk pumping device 1, the milk pumping device 2, and the milk pumping device 3 are all 53 mm, and the calculated first offset values ​​are 10 mm, 11.3 mm, and 11.1 mm, respectively.

[0101] S500: calibrate the latest distance value using the first offset value to obtain a current calibrated distance value.

[0102] like Figure 4 and Figure 5 As shown, compared with the latest distance value, the current calibration distance value can more accurately reflect the actual liquid level distance. During the milking process, the latest distance value can be calibrated continuously to obtain the current calibration distance value, so that the liquid level can be determined in real time.

[0103] Optionally, the latest distance value is calibrated using the first offset value to obtain a current calibrated distance value, and the details may refer to the following steps included in step S500:

[0104] S510: Subtract the first offset value from the current latest distance value that is located after the characteristic distance value in time sequence to obtain a current calibration distance value.

[0105] For example, the current calibration distance values ​​of the milk suction device 1, the milk suction device 2 and the milk suction device 3 in Table 3 are obtained by respectively subtracting the corresponding first offset values ​​from the distance values ​​of the milk suction device 1, the milk suction device 2 and the milk suction device 3 in Table 2. For example, the distance value 61 mm of the milk suction device 1 in Table 2 minus the first offset value 10 mm obtained by the milk suction device 1, that is, the current calibration distance value 51 mm of the milk suction device 1 in Table 3 is obtained.

[0106] The multiple distance values ​​are obtained in sequence in time sequence, and the latest distance value is located after the characteristic distance value in time sequence. During the milking process, as the liquid level rises, the distance value is continuously updated, and the current calibration distance value obtained by calibration is also continuously updated.

[0107] In some embodiments, the first offset value is a positive number. In other embodiments, the first offset value is a negative number.

[0108] For the distance value that is located before the characteristic distance value in the time series, the corresponding milk storage amount is small, so the distance value that is located before the characteristic distance value in the time series may not be calibrated using the first offset value.

[0109] S600: Obtain a volume value corresponding to the current calibration distance value as the current milk storage capacity of the milk storage bin.

[0110] The current calibration distance value can more accurately reflect the liquid surface distance. The volume value can be used to indicate the volume of breast milk in the milk storage bin, that is, the amount of milk stored. The unit of the volume value can be milliliters, ounces, etc. According to the design parameters of the milk pumping device, the liquid surface distance and the volume value can correspond one to one, so that the current calibration distance value can be converted to obtain the corresponding volume value. For example, the current calibration distance value can be converted to obtain the corresponding volume value by looking up a table.

[0111] Optionally, the method for measuring the amount of stored milk also includes:

[0112] S710: Acquire a plurality of light energy values ​​corresponding to the plurality of distance values, wherein the light energy values ​​are obtained by emitting a measuring light to the liquid surface of the milk storage bin.

[0113] The light energy value is the energy value of the photon. Each distance value obtained by the measurement module has a corresponding light energy value. Specifically, the measurement module can emit a measurement light, the liquid surface can reflect the measurement light emitted by the measurement module, and the measurement module can receive the measurement light reflected by the liquid surface, thereby obtaining the energy value of the photon reflected by the liquid surface.

[0114] S720: Determine the change trend of multiple light energy values.

[0115] The breast pump device may have the function of heating breast milk, which may cause a temperature difference between the measuring module and the liquid surface due to uneven heating, thereby generating fog. The fog may affect the reflection of photons, causing errors in the measurement results of the measuring module.

[0116] When there is no fog, the changing trends of the multiple light energy values ​​are stable. When fog appears, the changing trends of the multiple light energy values ​​will change. Therefore, whether fog appears can be determined by judging the changing trends of the multiple light energy values.

[0117] S730: If the variation trend of the plurality of light energy values ​​does not conform to the preset variation trend, calibrate the current calibration distance value based on the preset fog calibration value.

[0118] As the liquid level rises, the measurement module can obtain multiple light energy values ​​in sequence. The distance value can be calculated based on the light energy value, so the light energy value and the distance value can correspond one to one. Figure 7As shown in Table 4, when there is no fog, as the liquid level rises, the change trend of multiple light energy values ​​is increasing, that is, it meets the preset change trend. Figure 6 As shown, the generation of fog will affect the reflection of photons, so that the light energy value of the photons received by the measuring module is at least partially reduced, that is, it does not conform to the preset change trend.

[0119] As shown in Table 4 and Figure 6 As shown in the figure, if the trend of the change of several consecutive light energy values ​​is decreasing, it means that fog is generated and the fog affects the light energy value obtained by the measurement module. Correspondingly, the current calibration distance value obtained by calibrating the distance value also has errors caused by fog. Comparing the data in the measurement error column of Table 4 and Table 5, it can be found that the measurement error when there is fog is significantly higher than the measurement error when there is no fog. Therefore, it is necessary to calibrate the current calibration distance value to reduce the measurement error caused by fog.

[0120] The preset fog calibration value can be used to reflect the measurement error caused by fog, so the preset fog calibration value can be used to calibrate the current calibration distance value. The preset fog calibration value can be obtained based on laboratory test data. The preset fog calibration value may be a positive number or a negative number.

[0121] It should be noted that the trend of light energy values ​​decreasing means that the overall trend of light energy values ​​decreasing. For a number of consecutively obtained light energy values, if the overall trend of light energy values ​​decreasing, even if there are some later obtained light energy values ​​greater than the earlier obtained light energy values, it can still be considered that the trend of light energy values ​​decreasing.

[0122] Optionally, the variation trends of the multiple light energy values ​​may be determined by referring to the following steps included in step S720:

[0123] S721: Determine a change trend of a light energy value corresponding to a distance value between a first distance threshold and a second distance threshold, wherein the first distance threshold is smaller than the second distance threshold.

[0124] According to laboratory measurement data, such as Figure 6 and Figure 7 As shown in the figure, compared with the multiple light energy values ​​obtained in the absence of fog, the change trend of the light energy values ​​corresponding to the multiple distance values ​​obtained in the presence of fog between the first distance threshold and the second distance threshold will change. Therefore, during the use of the breast pump device, it can be judged whether fog is generated according to the change trend of the light energy values ​​corresponding to the distance values ​​between the first distance threshold and the second distance threshold. If fog is generated, it is necessary to further calibrate the measurement results to reduce the measurement error caused by fog.

[0125] The first distance threshold and the second distance threshold can be obtained from laboratory measurement data. For example, the second distance threshold is 65 mm, and the first distance threshold is 56 mm.

[0126] Optionally, if the variation trend of the multiple light energy values ​​does not conform to the preset variation trend, the current calibration distance value is calibrated based on the preset fog calibration value, and the specific steps may refer to the following steps included in step S730:

[0127] S731: If the light energy value corresponding to the distance value between the first distance threshold and the second distance threshold has a decreasing trend, calibrate the current calibration distance value based on the preset fog calibration value.

[0128] For example, in Table 4, the second distance threshold is 65mm, the first distance threshold is 56mm, the distance values ​​between the first distance threshold and the second distance threshold are 63.2mm, 60.9mm, 59.3mm, 57.5mm and 56.8mm respectively, and the light energy values ​​corresponding to the distance values ​​are 1348, 1099, 1088, 1032 and 793 respectively. The change trend of the light energy value is decreasing, so the current calibration distance value needs to be calibrated based on the preset fog calibration value. In Table 5, the change trend of the light energy value is increasing, so the current calibration distance value does not need to be calibrated.

[0129] Optionally, the current calibration distance value is calibrated based on the preset fog calibration value, and specifically, reference may be made to the following steps included in step S731:

[0130] S732: Add the preset fog calibration value to the current calibration distance value, and use the addition result as the new current calibration distance value.

[0131] For example, the preset fog calibration value fog_mm is 6 mm, and the current calibration distance value avlid_mm obtained by calibrating the distance value is 55 mm. Then, the new current calibration distance value avlid_mm2 obtained by adding the preset fog calibration value to the current calibration distance value is 61 mm.

[0132] Optionally, the method for measuring the amount of stored milk also includes:

[0133] S810: Acquire posture information of the breast pump device.

[0134] The posture information can reflect the posture of the breast pump. The posture of the breast pump is affected by the way the user wears the breast pump or the user's posture. When the posture of the breast pump is unreasonable, the liquid level in the milk storage bin will tilt, causing errors in the measurement results.

[0135] Optionally, the posture information includes a wearing angle. The wearing angle can be represented by the angle of the breast pump device relative to a preset coordinate axis in space. The wearing angle is affected by the way the user wears the breast pump device or the user's posture. For details on how to obtain the posture information of the breast pump device, refer to the following steps included in step S810:

[0136] S811: Obtain wearing angle through acceleration sensor.

[0137] The accelerometer is also called the gsensor. The accelerometer can obtain accelerations from three different axes. The three different axes can be represented by the mutually perpendicular X-axis, Y-axis and Z-axis. Specifically, due to the gravity of the earth, when the accelerometer is placed flat, the Z-axis direction can sense 1g of gravity acceleration. If it moves or tilts, the vertical gravity acceleration will be decomposed into the X-axis, Y-axis and Z-axis. Therefore, when the wearing angle changes, the gravity acceleration component values ​​on the X-axis, Y-axis and Z-axis continue to change, so that the wearing angle of the breast pump device can be obtained based on the gravity acceleration component values ​​on the X-axis, Y-axis and Z-axis.

[0138] S820: If the posture information of the breast pumping device does not meet the preset posture requirement, a second prompting message is issued to prompt the user that the posture of the breast pumping device is not good.

[0139] The preset posture requirement can make the breast pump device in a reasonable posture. If the posture information of the breast pump device does not meet the preset posture requirement, the breast pump device can prompt the user to adjust the way of wearing the breast pump device or adjust their own posture by sending a second prompt message.

[0140] The second prompt information can be output in various ways, for example, the user can be prompted through a display screen, a speaker, etc. The second prompt information can be in various forms, including images, sounds, texts, numbers, etc. The content of the second prompt information can include the posture of the breast pump device, and can also include suggestions for the posture of the breast pump device.

[0141] Optionally, if the posture information of the breast pumping device does not meet the preset posture requirement, a second prompting message is issued to prompt the user that the posture of the breast pumping device is not good. For details, refer to the following steps included in step S820:

[0142] S821: If the wearing angle of the breast pumping device does not meet the preset angle requirement, a second prompting message is issued to remind the user that the posture of the breast pumping device is not good.

[0143] The preset angle requirement can make the breast pump device maintain a reasonable wearing angle, so that the breast pump device is in a reasonable posture. If the wearing angle of the breast pump device does not meet the preset posture requirement, the breast pump device can prompt the user to adjust the way of wearing the breast pump device or adjust their own posture by sending a second prompt message.

[0144] Optionally, the method for measuring the amount of stored milk includes:

[0145] S910: Obtaining a weight change of the breast pump device through a weight sensor during the process of the breast pump device sucking breast milk.

[0146] S920: Calculate the volume of breast milk sucked by the breast pumping device according to the weight change of the breast pumping device.

[0147] S930: Calculate the difference between the volume of breast milk sucked by the breast pump device and the current milk storage volume to obtain a third offset value.

[0148] S940: Calibrate the current milk storage amount obtained subsequently using the third offset value.

[0149] The weight sensor can first obtain the weight M0 of the milk pumping device when the milk storage bin is empty. When the milk pumping device stops sucking breast milk, the weight sensor can obtain the weight Mi (i=1, 2, ..., n, where n is the number of times the weight sensor weighs the milk pumping device, for example, n is 10) of the milk pumping device. The difference between Mi and M0 is the weight of the breast milk sucked by the milk pumping device. The density of breast milk can be approximately considered to be the density of water, so the volume of breast milk sucked by the milk pumping device can be calculated.

[0150] The volume Vg of breast milk obtained by weighing with the weight sensor can be considered as the actual volume of breast milk. Vg can be used to calibrate the current milk storage volume. In some embodiments, during the operation of the milk pumping device, the difference between the volume Vg of breast milk sucked by the milk pumping device and the current milk storage volume can be calculated multiple times to obtain multiple third offset values. If the values ​​of multiple third offset values ​​are consistent or approximate, the average value of the multiple third offset values ​​can be calculated. In the subsequent measurement process, the average value of the multiple third offset values ​​can be added to the current milk storage volume, and the addition result can be used as the final measurement result to calibrate the current milk storage volume obtained subsequently. The third offset value may be a positive number or a negative number.

[0151] like Figure 8As shown, the measuring module 110 described in the measuring module embodiment of the present application includes a light emitting component 111, a light receiving component 112 and a first processor 113. The light emitting component 111 is used to emit the measuring light, and the light receiving component 112 is used to receive the reflected measuring light. The first processor 113 is coupled to both the light emitting component 111 and the light receiving component 112. The first processor 113 is used to execute a computer program to implement the measuring method described in the embodiment of the measuring method for the amount of stored milk.

[0152] The first processor 113 is used to control the operation of the measurement module 110. The first processor 113 can also be called a CPU (Central Processing Unit). The first processor 113 may be an integrated circuit chip with signal processing capabilities. The first processor 113 can also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0153] Optionally, the measuring light is infrared light.

[0154] Optionally, the light receiving component 112 can receive light reflected by the liquid surface and sense the light to obtain a light energy value.

[0155] Optionally, the measurement module 110 is a ToF sensor.

[0156] like Figure 8 and Fig. 9 As shown, the milk pumping device 100 described in the embodiment of the milk pumping device of the present application further includes a second processor 130 and a memory 140. The second processor 130 and the memory 140 are respectively coupled to the first processor 113. The measuring module 110 is used to measure the amount of milk stored in the milk storage bin 120. The second processor 130 is used to control the measuring module 110 to measure the amount of milk stored in the milk storage bin 120. The memory 140 stores a computer program. The first processor 113 can execute the computer program to implement the measurement method described in the embodiment of the measurement method of the amount of milk stored.

[0157] The memory 140 can provide storage space for both the first processor 113 and the second processor 130. For example, the second offset value obtained by the measurement module 110 can be written into the memory 140, and the first processor 113 can read the second offset value from the memory 140 when necessary. For another example, the third offset value can also be written into the memory 140 to be read when necessary.

[0158] Optionally, the second processor 130 is electrically connected to the weight sensor 220 to obtain the weight of the breast pump device 100 .

[0159] Optionally, the second processor 130 may obtain the current stored milk amount from the first processor 113 .

[0160] Optionally, the memory 140 is a flash memory.

[0161] The memory 140 is used to store computer programs. Optionally, the memory 140 may be a RAM, a ROM, or other types of storage devices. Specifically, the memory 140 may include one or more computer-readable storage media, which may be non-transitory. The memory 140 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 140 is used to store at least one program code.

[0162] Alternatively, if Fig. 9 As shown, the bottom wall of the milk storage bin 120 is provided with a reflective coating 121, and the reflective coating 121 is used to reflect the measurement light. In this way, the measurement light can be reduced from penetrating the bottom wall of the milk storage bin 120, thereby reducing the measurement error. The reflective coating 121 can be made of opaque material.

[0163] Furthermore, the inner bottom wall of the milk storage bin 120 is provided with a reflective coating 121 .

[0164] Optionally, the bottom wall of the milk storage bin 120 is made of an opaque material. The bottom wall of the milk storage bin 120 can be used as a reflective coating 121.

[0165] Optionally, the breast pump device 100 further includes an outer cover assembly and a main unit. The outer cover assembly is provided with a milk inlet channel, which is connected to the milk storage bin 120. The main unit may be provided with a suction device, and when the suction device is in operation, negative pressure is generated in the milk inlet channel, thereby sucking breast milk into the milk inlet channel, and then the breast milk may enter the milk storage bin 120. During the use of the breast pump device 100, one side of the outer cover assembly may fit the human skin, so that breast milk enters the milk inlet channel through one end of the milk inlet channel close to the human body. Furthermore, the end of the milk inlet channel facing the human body has a trumpet-shaped opening to better fit the human body.

[0166] The second processor 130 can control the suction device to pump air. While the suction device is pumping air, the second processor 130 can control the measuring module 110 to measure the amount of stored milk.

[0167] Alternatively, if Figure 8As shown, the breast pumping device includes an acceleration sensor 160. The acceleration sensor 160 may be coupled to the first processor 113 and the second processor 130. The breast pumping device 100 may obtain a wearing angle through the acceleration sensor 160.

[0168] Optionally, the milk pumping device 100 is electrically connected to an electronic device. The milk pumping device 100 may send the first prompt information and the second prompt information to the electronic device, so that the user can obtain the first prompt information and the second prompt information through the electronic device. The user may also send an instruction to the milk pumping device 100 through the electronic device, and the second processor 130 may receive the instruction and control the milk pumping device 100 to measure the amount of stored milk according to the instruction. The electronic device may be a mobile phone, a tablet computer, etc.

[0169] like Figure 8 and Fig.10 As shown, the milk pumping kit 10 described in the embodiment of the milk pumping kit of the present application includes a milk pumping device 100 and a charging chamber 200. The milk pumping device 100 is provided with a first electrical connector 150. The charging chamber 200 is provided with a coupled second electrical connector 210 and a weight sensor 220. The second electrical connector 210 is used to connect with the first electrical connector 150, so that the charging chamber 200 charges the milk pumping device 100. The weight sensor 220 is used to be triggered by the second electrical connector 210 being connected with the first electrical connector 150, thereby measuring the weight of the milk pumping device 100.

[0170] Through the connection induction between the second electrical connector 210 and the first electrical connector 150, the charging chamber 200 can detect that the breast pumping device 100 is placed in place. When the breast pumping device 100 is charging, the weight sensor 220 can be located below the breast pumping device 100 so as to obtain the weight of the breast pumping device 100. In some embodiments, the charging chamber 200 is provided with a third processor, and the third processor is used to calculate the volume Vg of breast milk sucked by the breast pumping device 100 according to the weight of the breast pumping device 100. In other embodiments, the charging chamber 200 can send the weight of the breast pumping device 100 to the breast pumping device 100, and the first processor 113 or the second processor 130 calculates the volume Vg of breast milk sucked according to the weight change of the breast pumping device 100.

[0171] The charging compartment 200 can send the weight of the breast pump device 100 or the volume Vg of breast milk sucked by the breast pump device 100 to the breast pump device 100 via the second electrical connector 210 or wireless communication, and then the breast pump device 100 calculates the third offset value and uses the third offset value to calibrate the current milk storage amount.

[0172] Optionally, the second electrical connector 210 is a pogo pin.

[0173] Optionally, the number of the second electrical connectors 210 is two.

[0174] Optionally, the breast pump device 100 is wirelessly connected to the charging chamber 200. For example, the breast pump device 100 is connected to the charging chamber 200 via Bluetooth Low Energy (also known as Bluetooth LE, BLE, Bluetooth Smart).

[0175] In summary, in this embodiment, the distance value can be calibrated using the first offset value during the working process of the measuring module 110, thereby obtaining the current calibrated distance value. The first offset value can reflect the influence of the characteristics of breast milk itself on the measurement result. Compared with the distance value, the current calibrated distance value can more accurately reflect the actual distance between the measuring module 110 and the liquid surface, thereby improving the accuracy of measuring the amount of milk stored by the breast pumping device 100.

[0176] Table 1 Example of correspondence between multiple distance values ​​and actual distance and actual breast milk volume

[0177]

[0178] Table 2 Another example table of correspondence between multiple distance values ​​of different breast pumping devices and actual distance and actual breast milk volume

[0179]

[0180]

[0181] Table 3 Example of correspondence between current calibration distance values ​​and actual distance and actual breast milk volume of different breast pumping devices

[0182]

[0183]

[0184] Table 4 Example of correspondence between distance value, light energy value, actual breast milk volume, and measured breast milk volume when fog exists

[0185]

[0186] Table 5 Corresponding example table of distance value, light energy value, actual breast milk volume, and measured breast milk volume when there is no fog

[0187]

[0188]

[0189] The above are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for measuring the amount of milk stored in a breast pump device, characterized in that: include: Acquire a plurality of distance values ​​arranged in time series, and determine a characteristic distance value from the plurality of distance values; Calculating the difference between the characteristic distance value and the preset calibration distance value to obtain a first offset value; Using the first offset value to calibrate the latest distance value, to obtain a current calibrated distance value; A volume value corresponding to the current calibration distance value is obtained as the current milk storage capacity of the milk storage bin.

2. The method according to claim 1, characterized in that The acquiring a plurality of distance values ​​arranged in time series and determining a characteristic distance value from the plurality of distance values ​​comprises: Emitting a measuring light beam toward the liquid surface of the milk storage bin to measure the liquid surface distance, and obtaining the plurality of distance values ​​arranged in time sequence; When it is determined that the multiple distance values ​​meet a preset condition, a characteristic distance value is determined from the multiple distance values.

3. The method according to claim 2, characterized in that The determining that the multiple distance values ​​meet a preset condition includes: Determining whether the multiple distance values ​​satisfy a preset change trend in time sequence; If so, determining that the multiple distance values ​​satisfy the preset condition; If not, it is determined that the multiple distance values ​​do not meet the preset condition.

4. The method according to claim 3, characterized in that The determining whether the plurality of distance values ​​satisfy a preset change trend in time sequence includes: Determine whether the magnitudes of the plurality of distance values ​​first increase and then decrease in time sequence; If yes, determining that the plurality of distance values ​​satisfy the preset change trend in time sequence; If not, it is determined that the multiple distance values ​​do not satisfy the preset change trend in time sequence.

5. The method according to claim 4, characterized in that Determining a characteristic distance value from the multiple distance values ​​includes: The multiple distance values ​​are compared, and the distance value with the largest value is determined as the characteristic distance value.

6. The method according to claim 5, characterized in that The using the first offset value to calibrate the latest distance value to obtain a current calibrated distance value includes: The first offset value is subtracted from the latest distance value that is located after the characteristic distance value in time sequence to obtain the current calibration distance value.

7. The method according to claim 1, characterized in that The acquiring of a plurality of distance values ​​arranged in time sequence comprises: One of the multiple distance values ​​is determined every second time interval, and the multiple distance values ​​are determined after multiple second time intervals.

8. The method according to claim 7, characterized in that Determining a distance value among the plurality of distance values ​​comprises: An initial average value is calculated based on the light reflection information at each first time interval; wherein the light reflection information is obtained by emitting a measurement light to the liquid surface of the milk storage bin; After obtaining the first preset number of initial average values, calculating the average value of the initial average values; An average of the initial averages is determined as one of the distance values.

9. The method according to claim 8, characterized in that The step of calculating an initial average value based on the light reflection information every first time interval comprises: An initial distance value is calculated based on the light reflection information every third time interval; After obtaining the second preset number of the initial distance values, an average value of the initial distance values ​​is calculated, and the average value of the initial distance values ​​is determined as the initial average value.

10. The method according to claim 9, characterized in that The calculating an initial distance value based on the light reflection information every third time interval includes: Before the breast pump device sucks breast milk, calibrate the empty milk storage bin to obtain a second offset value; The initial distance value is calculated based on the second offset value and light reflection information.

11. The method according to claim 10, characterized in that The step of calibrating the empty milk storage bin to obtain a second offset value before the breast milk extraction device extracts breast milk comprises: Obtaining light reflection information of the milk storage bin in an empty state and obtaining a third preset number of empty distance values ​​based on the light reflection information; wherein the empty distance value represents the distance between the measuring module and the bottom wall of the milk storage bin measured by the measuring module; Calculate the difference between each of the empty distance values ​​and the preset empty distance value to obtain the initial offset value of the third preset number; wherein the preset empty distance value represents the preset distance from the measuring module to the bottom wall of the milk storage bin; An average value of the third preset number of initial offset values ​​is calculated, and the average value of the third preset number of initial offset values ​​is determined as the second offset value.

12. The method according to claim 8, characterized in that The step of determining the average value of the initial average values ​​as one of the distance values ​​of the plurality of distance values ​​comprises: Calculate the difference between the average of the initial average values ​​and the initial average value, and use the difference between the two as the actual fluctuation value; comparing the actual fluctuation value with a preset fluctuation threshold; If the actual fluctuation value is less than the preset fluctuation threshold, determining the average value of the initial average values ​​as a distance value among the multiple distance values; If the actual fluctuation value is greater than or equal to the preset fluctuation threshold, a first prompt message is issued to prompt the user that the jitter is large.

13. The method according to claim 1, characterized in that The method further comprises: Acquire a plurality of light energy values ​​corresponding to the plurality of distance values ​​one by one; wherein the light energy values ​​are obtained by emitting a measuring light to the liquid surface of the milk storage bin; Determining a change trend of the multiple light energy values; If the variation trends of the plurality of light energy values ​​do not conform to the preset variation trend, the current calibration distance value is calibrated based on a preset fog calibration value.

14. The method according to claim 13, characterized in that The determining of the change trends of the multiple light energy values ​​includes: Determine a change trend of the light energy value corresponding to the distance value between a first distance threshold and a second distance threshold; wherein the first distance threshold is less than the second distance threshold; If the variation trend of the plurality of light energy values ​​does not conform to the preset variation trend, calibrating the current calibration distance value based on the preset fog calibration value includes: If the change trend of the light energy value corresponding to the distance value between the first distance threshold and the second distance threshold is decreasing, the current calibration distance value is calibrated based on a preset fog calibration value.

15. The method according to claim 14, characterized in that The calibrating the current calibration distance value based on the preset fog calibration value includes: The preset fog calibration value is added to the current calibration distance value, and the addition result is used as the new current calibration distance value.

16. The method according to claim 1, characterized in that include: Acquiring posture information of the breast pump device; If the posture information of the breast pump device does not meet the preset posture requirement, a second prompting message is issued to prompt the user that the posture of the breast pump device is not good.

17. The method according to claim 16, characterized in that The posture information includes a wearing angle; The obtaining of the posture information of the breast pumping device includes: Acquiring the wearing angle through an acceleration sensor; If the posture information of the breast pumping device does not meet the preset posture requirement, issuing a second prompting message for prompting the user that the posture of the breast pumping device is not good includes: If the wearing angle of the breast pump device does not meet the preset angle requirement, a second prompt message is issued to prompt the user that the posture of the breast pump device is not good.

18. The method according to claim 1, characterized in that include: Acquiring a weight change of the milk sucking device by using a weight sensor during the process of the milk sucking device sucking breast milk; Calculating the volume of breast milk sucked by the milk sucking device according to the weight change of the milk sucking device; Calculating the difference between the volume of breast milk sucked by the breast pumping device and the current milk storage volume to obtain a third offset value; The third offset value is used to calibrate the current milk storage amount obtained subsequently.

19. The method according to claim 2, characterized in that include: The step of emitting a measurement light beam toward the liquid surface of the milk storage bin to measure the liquid surface distance to obtain the multiple distance values ​​arranged in time sequence includes: The measurement light is emitted to the liquid surface by using a ToF sensor to measure the liquid surface distance to obtain the multiple distance values.

20. A measurement module, characterized in that: include: A light emitting component, a light receiving component and a first processor; The light emitting component is used to emit the measuring light, and the light receiving component is used to receive the reflected measuring light; The first processor is coupled to both the optical transmitting component and the optical receiving component; the first processor is used to execute a computer program to implement the method described in any one of claims 1-19.

21. The measurement module according to claim 20, characterized in that: The measurement module is a ToF sensor.

22. A breast pumping device, characterized in that: include: A milk storage silo, a measurement module according to claim 20 or 21, a second processor and a memory; The second processor and the memory are respectively coupled to the first processor; The measuring module is used to measure the amount of milk stored in the milk storage bin; the second processor is used to control the measuring module to measure the amount of milk stored in the milk storage bin; and the memory stores the computer program.

23. The breast pump device according to claim 22, characterized in that The bottom wall of the milk storage bin is provided with a reflective coating, and the reflective coating is used to reflect the measuring light.

24. A breast pump kit, characterized in that: include: The breast pump device according to claim 22 or 23, wherein the breast pump device is provided with a first electrical connector; A charging bin body is provided with a coupled second electrical connector and a weight sensor; the second electrical connector is used to connect with the first electrical connector so that the charging bin body can charge the milk pump device; the weight sensor is used to be triggered by the connection between the second electrical connector and the first electrical connector, thereby measuring the weight of the milk pump device.

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