CN105387907A - Method and device for measuring volume of liquid in container based on acceleration sensor - Google Patents
Method and device for measuring volume of liquid in container based on acceleration sensor Download PDFInfo
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- CN105387907A CN105387907A CN201510691290.3A CN201510691290A CN105387907A CN 105387907 A CN105387907 A CN 105387907A CN 201510691290 A CN201510691290 A CN 201510691290A CN 105387907 A CN105387907 A CN 105387907A
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- container
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
Abstract
The invention discloses a method and device for measuring volume of liquid in container based on an acceleration sensor. According to the scheme of the method and device, the acceleration sensor is utilized for obtaining different attitude parameters, and through the attitude parameter obtained when the container stably reaches the water outlet critical position, the volume of the liquid which is contained in the container at present is calculated by utilizing the mapping relation between the pre-determined attitude parameter and the liquid volume or the water volume. The method and device have the advantages of being extremely great in universality, low in power consumption, low in cost, low in structural requirement and the like.
Description
Technical field
The invention belongs to smart machine field, relate to a kind of measuring method and device of liquid in container volume, particularly relate to a kind of measuring method and device of the liquid in container volume based on acceleration transducer.
Background technology
Water is as Source of life, that people survive requisite material, correct water way contributes to people and keeps fit, but before people only rely on and self feel to drink water, the amount of drinking water of oneself cannot be got information about, along with the enhancing of health of people consciousness and the progress of technology, intelligence drinking equipment starts welcomed by the people, it accurately can measure the water yield that people absorb for a day, thus people can be made rational planning for self amount of drinking water, the important component part that will become in whole large health data again of these drinking-water data simultaneously.But in Intelligent water cup field, method goes to measure the water yield usually to utilize flowmeter, capacitance method, ultrasound wave, weigh etc., but these methods do not have universality, and they normally can only work under specific application scenarios.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of measuring method and device of liquid in container volume of easy low cost, attitude and the motion state of container can be obtained based on acceleration transducer, extrapolate volume or the water yield of liquid in container.
On the one hand, the technical solution used in the present invention comprises a kind of measuring method of the liquid in container volume based on acceleration transducer, said method comprising the steps of:
S10 arranges the attitude parameter of container and stores the queue of this attitude parameter, discriminant parameter under the state that definition distinguish containers tilts to enable liquid in container flow container opening and threshold range thereof, determine the mapping relations of container attitude parameter and liquid in container volume when this state, and stabilization time required when stablizing according to the definition of attitude parameter queuing data and initialization attitude parameter;
S20 is based on the sampling period, and the attitude parameter of collection container when heeling condition, is then inserted into attitude parameter queue successively;
S30 judges whether the discriminant parameter calculated by the data in current attitude parameter queue meets predefined threshold range, if met, performs next step, otherwise turns back to step S20;
S40 utilizes the mapping relations of predetermined container attitude parameter and liquid in container volume, calculates liquid in container volume by current attitude parameter queuing data, then stabilization time described in initialization turn back to step S20.
As the further improvement of such scheme, the attitude parameter of wherein said container comprises: the angle of the vector acceleration of acceleration transducer and the vertical direction of described container.
As the further improvement of such scheme, wherein said acceleration transducer is arranged on the bottom of described container regularly.
As the further improvement of such scheme, wherein said container is open-top receptacle.
Preferably, wherein said step S10 comprises: can avoid attitude and the water outlet of container of overflow when flowing out edge based on liquid in container, determines the mapping relations of container attitude parameter and liquid in container volume under the state enabling liquid in container flow container opening at container lean
Further, wherein said step S10 comprises: demarcate the maximum container open position of curvature as attitude and the water outlet of container that can avoid overflow.
As the further improvement of such scheme, wherein said step S20 comprises: judging that whether described attitude parameter queue is full, is perform next step, otherwise waits for that the sampling period carries out continuation sampling.
As the further improvement of such scheme, the wherein said sampling period is set to the standard deviation according to attitude parameter queuing data and adjusts.
Preferably, the wherein said sampling period is adjusted to and dynamically reduces according to the increase of the standard value of described attitude parameter queuing data.
As the further improvement of such scheme, wherein said step S30 comprises: the standard deviation calculating the attitude parameter queuing data gathered, judge whether this standard deviation is less than a threshold value preset, if it is perform next step, otherwise described stabilization time is increased the described sampling period and turns back to step S20.
As the further improvement of such scheme, wherein said step S10 comprises: stabilization time required when initialization attitude parameter is stablized is zero; If the standard deviation of attitude parameter queuing data is less than a standard deviation threshold method, then arranging the now corresponding time is attitude parameter stabilization time.
As the further improvement of such scheme, wherein said step S30 comprises: judge whether the described stabilization time of attitude parameter is within the scope of first threshold, if it is performs next step, otherwise stabilization time described in initialization turn back to step S20.
As the further improvement of such scheme, wherein said step S10 comprises: when being defined in container lean, liquid in container can the Second Threshold scope of attitude parameter under the state of flow container opening.
Preferably, wherein said step S30 comprises: calculate the mean value that described discriminant parameter comprises the attitude parameter queuing data of collection, judge whether this mean value is within the scope of the Second Threshold of described attitude parameter, if it is next step is performed, otherwise stabilization time described in initialization turn back to step S20.
On the other hand, the technical solution used in the present invention comprises a kind of measurement mechanism of the liquid in container volume based on acceleration transducer.Described device comprises the acceleration transducer and processor module that are fixedly connected with described container, and described processor module is configured to perform above-mentioned method.
Beneficial effect of the present invention is: the universality of measurement scheme is extremely strong, and the container of can arrange in pairs or groups unlike material, function, shape and capacity, has stronger versatility; Only need periodically to obtain cup body angle of inclination by acceleration transducer to calculate, the power consumption of electrical equipment is extremely low; Do not need to rely on complicated structure of container or survey instrument, and the cost realizing element needed for this programme is extremely low; Can integrate with container according to measurement mechanism of the present invention, compact conformation, volume takies few; Container according to the present invention is easy to use, and in natural use procedure, namely completes water yield detection, without the need to special operation.
Accompanying drawing explanation
Figure 1 shows that according to container measure of water principle schematic of the present invention;
Figure 2 shows that method for optimizing process flow diagram according to an embodiment of the invention;
Figure 3 shows that the mapping relations curve map of container lean angle in an embodiment according to the present invention and the container water yield.
Embodiment
Clear, complete description is carried out, to understand object of the present invention, scheme and effect fully below with reference to embodiment and the accompanying drawing technique effect to design of the present invention, concrete structure and generation.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Unless otherwise defined, all technology used herein are identical with the implication that those skilled in the art understand usually with scientific terminology.The term used in instructions is herein to describe specific embodiment, instead of in order to limit the present invention.
It should be noted that, the present invention is applicable to the liquid volume measuring can tilt to reach in the container of water outlet critical localisation.Open-top receptacle (being such as mug) and non-open-top receptacle (being such as water bottle) as long as reach described position, then applicable the solution of the present invention.In following disclosed multiple embodiment, carry out scheme description by the embodiment of water tumbler, but it will be appreciated that it does not limit the present invention and is applicable to other known containers.
Implement based on acceleration transducer according to the solution of the present invention.The 3D acceleration transducer that acceleration transducer can comprise, gravity sensor, gyroscope or other known sensors.In an embodiment according to the present invention, preferably 3D acceleration transducer is adopted.
With reference to the water tumbler schematic diagram shown in Fig. 1, at the bottom of a 3D acceleration transducer being placed in regularly glass or with it cup, for measuring attitude and the motion state of cup in real time.
When the water yield is different, 3D acceleration transducer can measure different cup body angles of inclination, by the mapping relations of cup body angle of inclination and the water yield, can obtain the water yield in cup in the hope of solution.
But, in what kind of situation, be judged to be that the action of drinking water of user has become the key point of the present invention program.A water tumbler can be keep flat on the table, also may be placed in foreign material with uncertain attitude; May be that user picks up cup and drinks water, also may be that user is holding cup walking; User may drink water, also may drink the even whole cup water of large half cup without a break up; It may be to drink water that user picks up cup, also may be to clean the situation such as cup.For overcoming the above problems, identifying the water yield in the action and water tumbler that user drinks water exactly, needing to design a set of solution to identify drinking-water action (when container lean reaches water outlet critical localisation and stable keep a period of time).
With reference to Figure 2 shows that method flow diagram according to an embodiment of the invention.Described method forms primarily of two parts, and wherein a part is the definitional part of function, parameter and threshold range, and another part is an endless loop, and it runs continuously, when find user drink water action complete time, by now the water yield export.Particularly with reference to accompanying drawing, said method comprising the steps of:
S101 defines 3D vector acceleration and water tumbler vertical direction angle is θ;
S102 definition is for storing the queue S{N} that the length of θ is N;
The mean function that S103 defines S{N} is Avg (S{N});
The S104 definition water yield is Vol (θ) about the function of tilt angle theta;
When S105 definition is drunk water, θ is not less than θ
0;
When S106 defines θ value stabilization, S{N} standard deviation is less than Std
0;
The standard deviation that S107 defines t S{N} queue is Std (t);
S108 defines StableTime stabilization time of θ, is initialized as 0;
It is T (x) about the function of Std (t) that S109 defines the sampling period;
S110 definition drinks water the time between TimeMin and TimeMax;
S201 reads θ value, is inserted into queue S{N};
S202 judges that whether queue S{N} is full, if less than, perform next step, if full, jump to step S301;
S203 waits for sampling period T (Std (t));
S301 judges Std (t) <Std
0whether set up, be, perform next step, otherwise jump to step S303;
S302 upgrades StableTime=StableTime+T (Std (t));
S303 judges whether TimeMin<StableTime<TimeMax sets up, and is, performs next step, otherwise jumps to step S306;
S304 judges Avg (S{N}) < θ
0whether set up, be, perform next step, otherwise jump to step S306;
It is Vol (Avg (S{N})) that S305 exports the water yield;
S306 resets StableTime=0, turns back to step S203.
Should be noted that in above-mentioned steps following some:
1. the sampling period is a function about queue S{N}, i.e. the attitude of cup for the previous period that depends on of the size in sampling period and the stability of motion state.When needing to make cup more unstable when building this function, the sampling period less (non-vanishing), to adapt to the Rapid Variable Design of cup attitude and motion state; And when cup is stablized, the sampling period suitably increases, to reduce power consumption;
2.S{N} is the queue in software algorithm concept, when it is not expired, only needs the end new element being placed on queue when inserting a new element.When it is full, need first to be removed by first of queue element when inserting a new element, all the other all elements move forward one, then new element are placed on the end of queue;
3. when building function T (x) in sampling period, should make once to drink water in the time, by queue S{N} at least update all one time, to ensure the reliability of last water yield data Vol (Avg (S{N}));
4. the TimeMin in figure is the time of minimum needs of once drinking water, and is preferably set to the empirical value according to actual measurement gained, and TimeMax is the time finishing off the required cost of whole cup water continuously, to different cups, and TimeMax value difference.The capacity of cup is larger, or rim of a cup is less, then the value of TimeMax then should correspondingly arrange larger.
Consider the drinking habit of people, the present invention preferably adopts uncovered water tumbler or drinking container.Reason is: for non-uncovered cup, and user, when drinking water, likely encases rim of a cup with mouth completely.At this moment, the number of the water yield is not depended at the angle of inclination of cup, and just depends on the custom of drinking water of user; For uncovered cup, user waits for the water surface relatively placidity in cup after must picking up cup, and at this moment just may start to drink water, now this method is very effective; And for non-uncovered cup, user does not need to wait for that the water surface in cup calms down after picking up cup, the error now measuring the method for the water yield with 3D acceleration transducer is larger.
Figure 3 shows that the mapping relations curve map of container lean angle and the container water yield in one embodiment.An existing internal diameter is 10 centimetres, interior height be the mapping relations of the angle of inclination of uncovered water tumbler (mug) water tumbler of 15 centimetres and water in the cup amount as shown in Figure 1, transverse axis is the vertical direction of water tumbler and the angle of gravity direction, unit is degree (°), the longitudinal axis is the corresponding water yield, and unit is milliliter (ml).Specifically describe the process step that the measure of water device of this water tumbler is demarcated below.
First utilize the liquid capacity metering instruments such as cylinder amount, the water of difference amount is poured into the water tumbler needing to carry out demarcating, then at leisure water tumbler is tilted.Tilt to water in the cup face just and rim of a cup maintains an equal level time, by the bottom of being arranged on glass or cup 3D acceleration transducer with it measure the angle of now water tumbler and gravity direction.This angle then forms a pair data with the water yield now.From 0ml to all water yields of cup total volume, all perform above operation, then can obtain the mapping relations curve of a cup body angle of inclination as shown in Figure 3 and the water yield.When during needs are by 3D acceleration transducer measuring cup during the water yield, go out the current water yield by this mapping relations backstepping.Be below the mapping relations tables of data 1 of cup body angle of inclination and the water yield:
Table 1
It should be noted that for some rim of a cup shapes it is not the water tumbler of positive round herein, we need to carry out some in the position of timing signal to the water surface and rim of a cup and judge.
For the rim of a cup of round rectangle, one in four angles of the round rectangle rim of a cup position as timing signal now should be chosen for.Because when user drinks water, for ensureing that the water in cup can not overflow from the corners of the mouth, in four angles will inevitably be selected, and any limit of round rectangle can not be selected.In like manner, for oval rim of a cup, then should choose the maximum point of two oval curvature (i.e. transverse and two oval intersection points).Minority is had to the water tumbler of singular configuration rim of a cup, choose the position that when user drinks water, maximum probability uses.
According to the cup body angle of inclination of demarcation and the mapping relations of the water yield, in the measure of water process of reality, obtain following data:
Table 2
| Actual amount of water (ml) | Measurement result (ml) | Error (ml) |
| 100 | 93 | -7 |
| 200 | 206 | 6 |
| 300 | 308 | 8 |
| 400 | 412 | 12 |
| 500 | 499 | -1 |
| 600 | 603 | 3 |
| 700 | 728 | 28 |
| 800 | 831 | 31 |
| 900 | 923 | 23 |
| 1000 | 1017 | 17 |
Can show that from upper table the present embodiment achieves and measure the water yield within the scope of reasonable error, satisfactory for result.
The above, just preferred embodiment of the present invention, the present invention is not limited to above-mentioned embodiment, as long as it reaches technique effect of the present invention with identical means, all should belong to protection scope of the present invention.In protection scope of the present invention, its technical scheme and/or embodiment can have various different modifications and variations.
Claims (15)
1., based on a measuring method for the liquid in container volume of acceleration transducer, it is characterized in that, said method comprising the steps of:
S10 arranges the attitude parameter of container and stores the queue of this attitude parameter, discriminant parameter under the state that definition distinguish containers tilts to enable liquid in container flow container opening and threshold range thereof, determine the mapping relations of container attitude parameter and liquid in container volume when this state, and stabilization time required when stablizing according to the definition of attitude parameter queuing data and initialization attitude parameter;
S20 is based on the sampling period, and the attitude parameter of collection container when heeling condition, is then inserted into attitude parameter queue successively;
S30 judges whether the discriminant parameter calculated by the data in current attitude parameter queue meets predefined threshold range, if met, performs next step, otherwise turns back to step S20;
S40 utilizes the mapping relations of predetermined container attitude parameter and liquid in container volume, calculates liquid in container volume by current attitude parameter queuing data, then stabilization time described in initialization turn back to step S20.
2. method according to claim 1, the attitude parameter of wherein said container comprises: the angle of the vector acceleration of acceleration transducer and the vertical direction of described container.
3. method according to claim 1, wherein said acceleration transducer is arranged on the bottom of described container regularly.
4. method according to claim 1, wherein said container is open-top receptacle.
5. method according to claim 4, wherein said step S10 comprises:
Attitude and the water outlet of container of overflow can be avoided when flowing out edge based on liquid in container, determine the mapping relations of container attitude parameter and liquid in container volume under the state enabling liquid in container flow container opening at container lean.
6. method according to claim 5, wherein said step S10 comprises:
Demarcate the maximum container open position of curvature as attitude and the water outlet of container that can avoid overflow.
7. method according to claim 1, wherein said step S20 comprises:
Judging that whether described attitude parameter queue is full, is perform next step, otherwise waits for that the sampling period carries out continuation sampling.
8. method according to claim 1, the wherein said sampling period is set to the standard deviation according to attitude parameter queuing data and adjusts.
9. method according to claim 8, the wherein said sampling period is adjusted to and dynamically reduces according to the increase of the standard value of described attitude parameter queuing data.
10. method according to claim 1, wherein said step S30 comprises:
Calculate the standard deviation of the attitude parameter queuing data gathered, judge whether this standard deviation is less than a threshold value preset, and if it is performs next step, otherwise described stabilization time is increased the described sampling period and turns back to step S20.
11. methods according to claim 1, wherein said step S10 comprises:
Stabilization time required when initialization attitude parameter is stablized is zero;
If the standard deviation of attitude parameter queuing data is less than a standard deviation threshold method, then arranging the now corresponding time is attitude parameter stabilization time.
12. methods according to claim 1, wherein said step S30 comprises:
Judge whether the described stabilization time of attitude parameter is within the scope of first threshold, if it is performs next step, otherwise stabilization time described in initialization turn back to step S20.
13. methods according to claim 1, wherein said step S10 comprises:
When being defined in container lean, liquid in container can the Second Threshold scope of attitude parameter under the state of flow container opening.
14. methods according to claim 13, wherein said step S30 comprises:
Calculate the mean value that described discriminant parameter comprises the attitude parameter queuing data of collection, judge whether this mean value is within the scope of the Second Threshold of described attitude parameter, if it is next step is performed, otherwise stabilization time described in initialization turn back to step S20.
15. 1 kinds of measurement mechanisms based on the liquid in container volume of acceleration transducer, it is characterized in that, described device comprises the acceleration transducer and processor module that are fixedly connected with described container, and described processor module is configured to the method any one of enforcement of rights requirement 1 to 14 described in claim.
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| CN107462294A (en) * | 2017-08-10 | 2017-12-12 | 广州机智云物联网科技有限公司 | A kind of vessel liquid topples over measuring method and system |
| CN107576365A (en) * | 2017-09-01 | 2018-01-12 | 丁木(北京)技术有限公司 | A kind of liquid container and its fluid flow detection method for showing flow |
| CN108627214A (en) * | 2018-05-25 | 2018-10-09 | 四川斐讯信息技术有限公司 | A kind of amount of drinking water compensation calculation method and system based on flowmeter |
| CN109512227A (en) * | 2018-11-26 | 2019-03-26 | 厦门盈趣科技股份有限公司 | A kind of cup detection water and drink water management method and cup |
| CN109709831A (en) * | 2019-01-10 | 2019-05-03 | 罗婧怡 | A method of the daily amount of drinking water of user is determined based on Intelligent water cup |
| CN111084548A (en) * | 2020-01-06 | 2020-05-01 | 珠海格力电器股份有限公司 | Thermos with water quantity display |
| CN111141372A (en) * | 2019-12-02 | 2020-05-12 | 珠海格力电器股份有限公司 | Liquid overflow detection method and device, electrical equipment and storage medium |
| CN113979037A (en) * | 2021-10-29 | 2022-01-28 | 上海任吾行机器人有限公司 | Mobile device liquid level stabilization tray structure |
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