CN100410632C - Device for measuring liquid quantity in arbitrary containers - Google Patents
Device for measuring liquid quantity in arbitrary containers Download PDFInfo
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- CN100410632C CN100410632C CNB2004100285411A CN200410028541A CN100410632C CN 100410632 C CN100410632 C CN 100410632C CN B2004100285411 A CNB2004100285411 A CN B2004100285411A CN 200410028541 A CN200410028541 A CN 200410028541A CN 100410632 C CN100410632 C CN 100410632C
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Abstract
The present invention relates to a device for measuring liquid quantity in a container with an arbitrary shape, which is formed by arranging a sensitive element of a liquid depth sensor in the container with an arbitrary shape and by sequentially connecting the liquid depth sensor, a liquid depth sensor analog-digital converter, a stored-program digital computer and a digital display device by circuits. The stored-program computer of the measuring device is stored with sequence holding capacity or volume data and upper and lower limit sequence data of a liquid depth numerical range, wherein the upper and lower limit sequence data is corresponding to the sequence holding capacity or volume data. The measuring device uses measured instant liquid depth data to find out the holding capacity or volume data corresponding to the measured instant liquid depth data by using a comparison method, and a measuring result can be obtained.
Description
Technical field:
The present invention relates to a kind of liquid in container measuring device, the interior amount of liquid measurement mechanism of particularly a kind of arbitrary shape container (comprising regular shape and irregular shape container).
Background technology:
Traditional regular shape liquid in container measuring device, require container and liquid to take up space being one is high cylinder with liquid depth.Like this, floorage can be surveyed acquisition in advance, and the degree of depth of liquid can be obtained by the measurement of the dark sensor of liquid, and computing machine multiplies each other this two number can try to achieve and measures volume (or volume) number of wishing to get.This device can't be measured for the amount of liquid in the random container.
Existing irregular shape liquid in container measuring device, as file 1---utility model patent " digital liquid measure display " of September 5 calendar year 2001 bulletin (Granted publication number: CN2445967Y) and file 2---on Dec 8th, 1999 bulletin utility model patent " automotive oil tank liquid measure tester " (Granted publication number: CN2352929Y).Two utility models have all been designed the basic hardware structure of irregular shape liquid in container measuring device, be the dark sensor of liquid (ultrasonic probe of the liquid level sensor of file 1, file 2), analog to digital converter (the ultrasonic ranging circuit that can record digital quantity of the A/D converter of file 1, file 2), stored programme digital machine (singlechip CPU of the single-chip microcomputer of file 1 and EEPROM, file 2 and storer), numeric display unit (display of the driving circuit of file 1 and charactron, file 2), connect successively with circuit.File 1 also provides sampling back " writing down the A/D conversion value of each oil level correspondence ", " has compared with the A/D conversion value, thereby draw corresponding oil level value." making, measuring method, file 2 also provides making, the measuring method of " the container depth direction is divided into 100 parts, is obtained the volume of its liquid by look-up table and method of interpolation ".But, because above-mentioned two utility models are in disclosed technical scheme, do not construct and desire to ask the relation of counting and recording between the number, also owing to use simple look-up table, make two utility models all can't try to achieve the amount of liquid that measurement mechanism is desired to ask, promptly disclosed technical scheme finally can't be finished the measurement of random liquid in container amount.The difficult measuring and calculating of random container and the characteristics that are difficult to ponder, make the scheme of the usefulness " method of interpolation is obtained the volume of its liquid " that file 2 proposes, shortcoming even without " do not construct between desiring to ask number and recording and concern ", also can cause measuring and calculating overlong time and the excessive consequence of error, reduce the practicality of measurement mechanism.The technical scheme of above-mentioned two utility models also has following common drawback: 1. do not have temperature difference means for correcting to make because of temperature variation and caused error; 2. do not allow container become the part of measurement mechanism, thereby caused the exchange error of container; 3. the Sensitive Apparatus of unqualified sensor necessarily places within the container of fluid to be measured place, thereby has increased because of being subjected to external interference, and fluid to be measured and the measuring error that causes different with the sensitive element temperature.These errors reduce measuring accuracy, thereby can't reach the purpose of file 2 propositions " the strong instrument of a monitoring is provided for national technical supervision department ".
Goal of the invention:
Purpose of the present invention is exactly for a kind of new liquid in container measuring device is provided, and which kind of shape tubular container is not, can both finish the measurement of liquid in container amount, and error correction effect is preferably arranged, to satisfy the demand in the society.
Summary of the invention:
For achieving the above object, the present invention takes following technical scheme: it comprises the dark sensor of liquid, analog to digital converter, stored programme digital machine, digital indicator, and said apparatus connects successively with circuit.Wherein the sensitive element of the dark sensor of liquid is in the fluid to be measured container, and this measurement mechanism also includes the dark measuring error means for correcting of liquid that temperature variation causes.Described container be with liquid deeply for high cylinder or liquid deeply for the Any shape beyond the high cylinder.
Identical with existing liquid in container measuring device is: also be that sensitive element with the dark sensor of liquid places in the container at fluid to be measured place, and dark sensor of liquid and the supporting analog to digital converter of the dark sensor of liquid, stored programme digital machine, numeric display unit etc. are linked in sequence with circuit and form.Here said container is meant flow container of fuel tank that need to measure amount of fluid in it, pond, canning cart or the like.The dark sensor of said liquid is meant the device that the amount of liquid depth can be converted to electric weight such as resistance, electric capacity, voltage, electric current; The supporting analog to digital converter of the dark sensor of said liquid is meant the dark sensor of the liquid that is output as voltage, electric current, resistance, electric capacity, is equipped with voltage respectively---digital quantity, electric current---digital quantity, resistance---digital quantity, electric capacity---converter of digital quantity.Said computing machine, stored program computing machine that should be all can be used, but uses single-chip microcomputer mostly or have the single-chip microcomputer of extended memory.Said digital display device gets final product with digital display device commonly used.
With the difference of existing liquid in container measuring device, promptly the feature of the technical program is:
1, this arbitrary shape liquid in container measuring device, used container can not be deeply to be high cylinder with liquid, also can be to be high cylinder with liquid depth.Can be arbitrary shape in other words.
2, stored program computer also stores one group of sequence volume (or volume) data: these group data are to be measurement unit with a volume (or volume) unit, measure in this measurement mechanism container, by zero to fill with container liquid obtained, tool total data at regular intervals, and arrangement in order.For example, a container is filled with and is needed 500 milliliters of liquid, so spacing be 1 milliliter sequence data be 0,1,2,3 ... 501 tactic data such as 500 grades, spacing be 5 milliliters sequence data be 0,5,10,15 ... 101 tactic data such as 500 grades;
3, stored program computer also stores the one group of dark numerical value of sequence liquid territory bound data.The dark numerical value of said liquid territory, be above-mentioned sequence hold each number in (body) volume data be middle calculation, with a spacing be size appearance (body) product codomain, the numerical value territory of the dark data of pairing expression liquid in measurement.
An appearance (body) volume data, for example 5 milliliters, except the amount of express liquid is whole 5 milliliters, still to be equal to or greater than 4.5 milliliters and less than the approximate value of all data (except 5 milliliters) in 5.5 milliliters of these scopes.This to be to be equal to or greater than 4.5 milliliters and be exactly a volume numerical value territory less than the set of 5.5 milliliters of all numbers, promptly one be 5 milliliters of places, with 1 milliliter of spacing volume numerical value territory that is size.And 5 milliliters of middle calculations that can be described as this numerical value territory.Be equal to or greater than 5 milliliters and less than 6 milliliters volume numerical value territory also be called be 5 milliliters of places with 1 milliliter of spacing volume numerical value territory that is size.But dividing like this makes measuring accuracy lower, spacing as the infructescence volume data is 5 milliliters, then volume numerical value territory, 5 milliliters of places is to be equal to or greater than 2.5 milliliters and less than the set of all volume data in 7.5 milliliters of scopes, 5 milliliters is exactly the middle calculation in this numerical value territory.
The implication in the dark numerical value of expression liquid territory is: when liquid in containers is some appearances (body) product value, in the measurement of the amount of liquid that carries out the technical program, just export a corresponding number with the analog to digital converter that the dark sensor of liquid is supporting, this number not necessarily is exactly the at this moment actual degree of depth number of liquid, but it all is one and changes and the number of corresponding proportional variation with liquid depth, so we are called the dark number of expression liquid to it.When liquid in container changes between an appearance (body) product codomain bound, data with the output of the supporting analog to digital converter of the dark sensor of liquid, also correspondingly change in a scope, the scope of this variation is exactly and the dark value data of the corresponding expression liquid of this appearance (body) product codomain territory.
The dark numerical value of expression liquid territory bound sequence data implication: all there are its upper limit number and lower limit number in the numerical value territory of the dark data of each expression liquid, and the lower limit number of a last number codomain is exactly the upper limit number in next numerical value territory, with these be upper limit number be again that the number of lower limit number is arranged in order, be exactly the dark numerical value of sequence liquid territory bound data.
4, the stored programme digital machine also stores the program of carrying out in amount of liquid is measured:
A) initial;
B) after program is initial, gather the dark data of expression liquid by the instant output of the supporting analog to digital converter of the dark sensor of liquid;
C),, seek the number of gathering successively and represent within the numerical value territory of the dark data of liquid, till finding at which with a bound number method relatively of representing the dark numerical value of liquid territory with the number of gathering that liquid is dark of representing;
Compare with the number of gathering and first bound number of representing the numerical value territory that liquid is dark in other words, relatively can use " number of upper limit number＞collection 〉=lower limit number ", the formula of also available sometimes " number of upper limit number 〉=collection＞lower limit number ", if coincidence formula requirement, the number that then can assert collection is just within first numerical value territory, stop to seek, if do not meet the formula requirement, whether then use the same method the number confirming to gather at the 2nd, the 3rd ... within the numerical value territory of the dark data of expression liquid, till finding.
D) the middle calculation of numerical value territory institute correspondence appearance (body) product codomain of the dark number of the expression liquid that will be searched out extracts from sequence appearance (body) volume data that storer is deposited;
E) appearance that will extract (body) product shows, more changes the number of the former maintenance of digital display device simultaneously, and keeps the new number that shows;
F) be back to the b step---gather the dark number of expression liquid again.As required, also can continue a period of time returns the b step again.
When the temperature of fluid to be measured changed, the physical parameter of the sensitive element of fluid to be measured and contact liq also can change accordingly, thereby caused the measurement of liquid depth is produced error.In order to improve the accuracy of measurement, this arbitrary shape liquid in container measuring device needs to increase temperature variation and the means for correcting that causes the dark measuring error of liquid.Increase the hardware that this means for correcting increases, the supporting analog to digital converter of temperature sensor and temperature sensor is arranged, its annexation is that the sensitive element with temperature sensor places in the container at fluid to be measured place, and the supporting analog to digital converter of temperature sensor and temperature sensor, stored programme digital machine are linked in sequence with circuit.Said temperature sensor is meant the device that the temperature amount is converted to electric weight.Means for correcting also comprises there is following content in the stored programme digital machine:
(1) sequence Temperature numerical territory bound data, it is fluid to be measured may be run into temperature range be divided into the several number codomain, the big just many divisions of the error that temperature variation causes are several, otherwise just divide several less, there are upper limit number, lower limit number in each numerical value territory, and the lower limit number of a last number codomain also is the upper limit number in next numerical value territory, is upper limit number with these, being again several series arrangement of lower limit number, is exactly sequence Temperature numerical territory bound data.
(2) sequence liquid is measured correction coefficient deeply: in the sequence Temperature numerical territory, each pairing liquid in Temperature numerical territory is measured correction coefficient deeply, and it is exactly that sequence liquid is measured correction coefficient deeply that series arrangement forms.Draw this sequence correction coefficient, determine earlier one can reference standard temperature (such as 10 ℃), in container, inject certain amount of fluid again, when standard temperature, measure liquid and count a deeply, select the degree of depth of the liquid of as much in middle calculation (such as the 20 ℃) measuring vessel in a Temperature numerical territory to count b then, if a/b=n, n measures correction coefficient with 20 ℃ deeply for the pairing liquid in Temperature numerical territory of middle calculation, obtain each self-corresponding liquid of each Temperature numerical territory with this a kind of method and measure correction coefficient deeply, their series arrangement are just drawn sequence liquid measure correction coefficient deeply.
(3) correcting fluid is measured the program of error deeply, and this program embeds when carrying out between the b step of above-mentioned measuring process executive routine and the c step and operates.
A) after gathering the dark data of expression liquid, the instant output temperature number of the supporting analog to digital converter of collecting temperature sensor, present temperature sensor is equipped with analog to digital converter, is exactly a digital temperature meter if add display device.So the numeral of analog converter output is exactly actual temperature number.Certainly, also have the numeral of analog to digital converter output just not meet the actual temperature number, just one varies with temperature and the number of respective change, and we can be called the number of representing temperature variation, preferably selects to go up a kind of in use.
B),, seek the number of collection successively within which Temperature numerical territory, till finding with Temperature numerical territory bound number method relatively with the temperature number of gathering.
C) find pairing liquid to measure correction coefficient deeply according to the Temperature numerical territory found, with the dark number of the expression liquid of gathering multiply each other obtain new, represent then to carry out the c step running of above-mentioned measuring process executive routine afterwards by the number that liquid is dark more accurately.
Beneficial effect:
From above narration, the technical program can produce positive beneficial effect, need measure its appearance (body) product if run into liquid in container in producing, living, and which kind of shape tubular container is not, can be solved with the technical program.
Description of drawings:
Passing through embodiment below in conjunction with accompanying drawing---oil amount measurement mechanism in the tank wagon oil tank elaborates to technical scheme:
Fig. 1 is the device architecture block scheme of the technical program.
Fig. 2 is the program flow diagram of the technical program measuring process.
Fig. 3 is the process of measurement process flow diagram that temperature variation causes the dark error correction device of liquid in the technical program.
Embodiment:
The container of label 10 expression arbitrary shapes among Fig. 1, be the oil tank of present embodiment, though this oil tank is a right cylinder, but the right cylinder of a recumbency, therefore not to be high cylinder, need to use the technical program to solve the problems of measurement of oil amount in this oil tank with liquid depth.
The dark sensor sensing element 11 of liquid places and is convenient to measure the dark position of liquid in the oil tank among Fig. 1, sensitive element 11 is connected with the dark sensor circuit part 12 of liquid, and the output terminal of sensor circuit part 12 is connected with the analog quantity input end of the supporting analog to digital converter 13 of the dark sensor of liquid; The output terminal of the supporting analog to digital converter 13 of the dark sensor of liquid links to each other with the I/O interface of stored programme digital machine 14, and another I/O interface of stored programme digital machine 14 links to each other with digital display device 15; Label 21 is sensitive elements that expression places the temperature sensor of oil tank inner bottom part among Fig. 1.It links to each other with temperature sensor circuit part 22, and temperature sensor circuit part 22 links to each other with the analog quantity input end of the supporting analog to digital converter 23 of temperature sensor.The supporting analog to digital converter output terminal of temperature sensor is connected with the I/O end of stored programme digital machine.More than these devices and between them circuit structure relation all be prior art, needn't do more detailed introduction.
The design and the actual measurement of several groups of data that the present embodiment storer is deposited:
(1) design of sequence container data: the total volume of supposing the oil tank of tank lorry is 2000 liters, error is less than 1 liter, metering sensitivity is 1 liter, so, the size that just can determine each volume numerical value territory is 1 liter, the middle calculation in each numerical value territory be spaced apart 1 liter, the calculation series arrangement is got up in each numerical value territory: 0,1,2,3 ... 2000 totally 2001 numbers with the unit of being upgraded to promptly are the sequence volume data of being asked.
(2) actual measurement obtains the dark numerical value of sequence liquid territory bound data: with each number in the above-mentioned sequence volume data is middle calculation, it (is the size of the volume neighborhood of middle calculation with 0 and 2000 wherein that the volume numerical value territory of dividing is 2001, have only the medium-sized of other numerical value territory, because 1 liter of permissible error, so will they treat by the numerical value territory), the bound several 0 in these 2001 volume numerical value territories, 0.5,1.5,2.5,1999.5,2000 totally 2002 numbers, when the oil in the oil tank is each number of 2002 numbers, the analog to digital converter that the dark sensor of the liquid of present embodiment is supporting, will export corresponding 2002 dark numbers of expression liquid, the i.e. bound number in the dark numerical value of the liquid territory of 2002 volume numerical value correspondences, its series arrangement is got up the dark numerical value of the sequence liquid territory bound data of being asked exactly.
(3) design of sequence Temperature numerical territory bound data: consider that oil is subjected to the scope of variation of ambient temperature to be generally-10 ℃～40 ℃, see according to the experiment situation, with 5 ℃ is that a Temperature numerical territory is more suitable, with this temperature range be divided into-10 ,-5,0,5 ... 40 totally 11 numbers be 11 Temperature numerical territories of middle calculation, their bound number-12.5 ,-7.5 ,-2.5,2.5 ... 42.5 totally 12 numbers, sequence Temperature numerical territory bound data that Here it is.
(4) actual measurement calculate to obtain the pairing sequence liquid in sequence Temperature numerical territory and measures correction coefficient deeply: at first selected one can reference the standard temperature number, such as select 15 ℃ of normal temperature, in oil tank, inject a certain amount of oil, the instant number of measuring the supporting analog to digital converter output of the dark sensor of liquid when the oil temperature is 15 ℃ is a, when temperature rises to 25 ℃, the instant number of output is b, if a/b=n, just we can say, measuring correction coefficient with 25 ℃ deeply for the pairing liquid in numerical value territory of middle calculation is n, and be 0 with 15 ℃ of pairing numerical value territory, numerical value territory amount of liquid correction coefficient for middle calculation, survey respectively with this method and to calculate each self-corresponding liquid of above-mentioned 11 Temperature numerical territories and measure correction coefficient deeply, these correction coefficient series arrangement promptly become sequence liquid and measure correction coefficient deeply.
Use measurement method, obtain the dark numerical value of sequence liquid territory bound data and sequence liquid and measure correction coefficient deeply, though quantities is very big, but as long as obtain these data of oil amount measurement mechanism in the oil tank, the tank wagon of ten million same model, the oil amount measurement mechanism can use these data in the oil tank that uses, and needn't go actual measurement to obtain again.
The program step that program step that the employed amount of liquid measuring process of present embodiment is carried out and correcting fluid are measured error deeply, identical with above narration needn't be given unnecessary details.
Claims (1)
1. amount of liquid measurement mechanism in any vessel, connect the stored programme digital machine respectively by dark sensor of liquid and supporting analog to digital converter, temperature sensor and supporting analog to digital converter thereof thereof, the stored programme digital machine connects digital indicator, it is characterized in that: this measurement mechanism also comprises container, and the sensitive element that limits dark sensor of liquid and temperature sensor places in the container at fluid to be measured place, described stored programme digital machine also stores following content:
1) measurement data form content:
1. one group of sequence volume or volume data: these group data are to be measurement unit with a volume or volume unit, measure in this measurement mechanism container, fill with liquid obtains, tool total data at regular intervals to container by zero, and arrangement in order;
2. the one group of dark numerical value of sequence liquid territory bound data, the dark numerical value of said liquid territory, be in above-mentioned sequence volume or the volume data each number be middle calculation, be the volume or the volume numerical value territory of size with a determining deviation, the numerical value territory of the dark data of pairing expression liquid in measurement;
2) measuring process is carried out and is used program step:
A) initial;
B) after program is initial, gather the dark data of expression liquid by the instant output of the supporting analog to digital converter of the dark sensor of liquid;
C),,, seek the number of gathering successively and represent within the numerical value territory of the dark data of liquid, till finding at which with method relatively with a bound number of representing the dark value data of liquid territory with the number of gathering that liquid is dark of representing;
D) the numerical value territory of the dark number of the expression liquid that will be searched out the middle calculation in corresponding volume or volume numerical value territory, extract sequence volume of depositing from storer or the volume data;
E) volume or the volume digital display that extracts shown, more change the number of the former maintenance of digital display device simultaneously, and keep the new number that shows;
F) be back to b) step;
3) temperature difference is proofreaied and correct and is used the data form content:
1. sequence Temperature numerical territory bound data, these sequence Temperature numerical territory bound data are temperature ranges that fluid to be measured is run into, the bound that is divided into plurality of temperature numerical value territory counts that series arrangement forms;
2. the sequence liquid of sequence Temperature numerical territory correspondence is measured correction coefficient deeply;
4) temperature difference program for correcting, this program embed above-mentioned measuring process and carry out b with program when carrying out) step and c) operate between the step:
A) after gathering the dark data of expression liquid, the instant output temperature number of the supporting analog to digital converter of collecting temperature sensor;
B),, seek the number of collection successively within which Temperature numerical territory, till finding with Temperature numerical territory bound number method relatively with the temperature number of gathering;
C) find pairing liquid to measure correction coefficient deeply according to the Temperature numerical territory found, with the dark number of the expression liquid of gathering multiply each other obtain new, represent the number that liquid is dark more accurately, then carry out above-mentioned measuring process afterwards and carry out c with program) the step running.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100285411A CN100410632C (en) | 2004-03-10 | 2004-03-10 | Device for measuring liquid quantity in arbitrary containers |
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| CNB2004100285411A CN100410632C (en) | 2004-03-10 | 2004-03-10 | Device for measuring liquid quantity in arbitrary containers |
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| CN100410632C true CN100410632C (en) | 2008-08-13 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101957224A (en) * | 2009-07-15 | 2011-01-26 | 杨紫乔 | Multifunctional device for measuring liquid volume in irregular container |
| CN103308112B (en) * | 2013-06-28 | 2015-09-09 | 中铁隧道集团一处有限公司 | A kind of simple and easy method of fast query capacity of underground water seal type cave depot |
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