CN111693118A - Calibration method of top-mounted magnetic turn-over plate liquid level meter - Google Patents
Calibration method of top-mounted magnetic turn-over plate liquid level meter Download PDFInfo
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Abstract
The invention discloses a calibration method of a top-mounted magnetic turn-over plate liquid level meter, and relates to the technical field of calibration of magnetic turn-over plate liquid level meters. The main technical scheme of the invention is as follows: measuring liquid with a preset liquid level height in the container for multiple times by using a magnetic turning plate liquid level meter to be calibrated so as to obtain multiple first height indicating values; measuring the liquid with the preset liquid level height in the container for multiple times by using a comparison liquid level meter to obtain multiple second height indicating values, wherein the precision grade of the comparison liquid level meter is higher than that of the magnetic turning plate liquid level meter to be calibrated; acquiring the repeatability of the magnetic turn-over plate liquid level meter to be calibrated according to the plurality of first height indicating values and the plurality of second height indicating values; and determining the calibration result of the magnetic turning plate liquid level meter to be calibrated according to the repeatability. The invention is mainly used for calibrating the top-mounted magnetic turn-over plate liquid level meter which is fixedly installed.
Description
Technical Field
The invention relates to the technical field of calibration of magnetic turn-over plate liquid level meters, in particular to a calibration method of a top-mounted magnetic turn-over plate liquid level meter.
Background
The magnetic flap level gauge (also called magnetic float level gauge) is developed according to the buoyancy principle and the magnetic coupling effect. When the liquid level in the measured container rises and falls, the magnetic floater in the liquid level meter body pipe also rises and falls, the magnetic steel in the floater is transmitted to the magnetic turning column indicator through magnetic coupling to drive the red and white turning columns to turn over by 180 degrees, the white turning column is changed into red when the liquid level rises, the red turning column is changed into white when the liquid level falls, and the red-white junction of the indicator is the actual height of the liquid level in the container, so that clear indication of the liquid level is realized. The magnetic turn-over plate liquid level meter produces liquid level meters suitable for various environments and various materials according to different specific working environments, and comprises the following components: hydraulic press level gauge, anticorrosion magnetic flap level gauge, thermal insulation jacket flap level gauge, high-temperature high-pressure magnetic flip column level gauge, top-mounted magnetic float level gauge, glass plate level gauge, frost prevention level gauge, glass tube level gauge, color quartz tube level gauge, series magnetic flip column (plate) level gauge, and the like. The device is widely applied to the continuous measurement and control of liquid level, oil-water interface and foam interface in the industries of metallurgy, petroleum, chemical industry, ships, environmental protection, electric power, papermaking, pharmacy, printing and dyeing, food, municipal administration and the like, and particularly the liquid level detection of high-temperature, high-pressure, high-viscosity, toxic, harmful and strong corrosive media in the chemical industry. However, no calibration method for the magnetic flap level gauge exists at present.
Disclosure of Invention
In view of this, the present invention provides a calibration method for a top-mounted magnetic flip-flop liquid level meter, and mainly aims to calibrate a top-mounted magnetic flip-flop liquid level meter which is fixedly installed.
In one aspect, the invention provides a calibration method for a top-mounted magnetic flip plate liquid level meter, which comprises the following steps: measuring liquid with a preset liquid level height in the container for multiple times by using a magnetic turning plate liquid level meter to be calibrated so as to obtain multiple first height indicating values;
measuring the liquid with the preset liquid level height in the container for multiple times by using a comparison liquid level meter to obtain multiple second height indicating values, wherein the precision grade of the comparison liquid level meter is higher than that of the magnetic turning plate liquid level meter to be calibrated;
acquiring the repeatability of the magnetic turn-over plate liquid level meter to be calibrated according to the plurality of first height indicating values and the plurality of second height indicating values;
and determining the calibration result of the magnetic turning plate liquid level meter to be calibrated according to the repeatability.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Specifically, the obtaining the repeatability of the magnetic level gauge to be calibrated according to the plurality of first height indication values and the plurality of second height indication values specifically includes:
calculating a first average value from a plurality of said first altitude indications;
calculating a second average value from a plurality of said second height indications;
calculating an average error value according to the first average value and the second average value;
and determining the repeatability of the magnetic plate level meter to be calibrated according to the plurality of first height indicating values, the plurality of second height indicating values, the average error value and the maximum allowable error of the magnetic plate level meter to be calibrated.
Specifically, the determining the repeatability of the magnetic level gauge to be calibrated according to the plurality of first height indication values, the plurality of second height indication values, the average error value, and the maximum allowable error of the magnetic level gauge to be calibrated specifically includes:
when the average error value is less than the maximum allowable error, according to a formula
Calculating the repeatability;
wherein S isnIs the repeatability;
Viobtaining a first height indicating value for the ith time of the magnetic turning plate liquid level meter to be calibrated;
Specifically, the determining the repeatability of the magnetic level gauge to be calibrated according to the plurality of first height indications, the plurality of second height indications, the average error value, and the maximum allowable error of the magnetic level gauge to be calibrated further includes:
when the average error is larger than the maximum allowable error, according to the formula
Calculating the repeatability;
wherein S isnIs the repeatability;
Viobtaining a first height indicating value for the ith time of the magnetic turning plate liquid level meter to be calibrated;
Specifically, the calculating a first average value according to the plurality of first altitude indications may specifically be:
according to the formula
Acquiring the first average value;
wherein,
is the first average value;
n is the total number of times the first altitude indication is obtained;
Viobtaining a first height indicating value for the ith time of the magnetic turning plate liquid level meter to be calibrated;
the calculating the second average value according to the plurality of second height indication values specifically includes:
according to the formula
Obtaining the second average value；
Wherein,
is the second average value;
n is the total number of times the second altitude indication is obtained;
V0iand obtaining the second height indication value for the ith time of the contrast liquid level meter.
Specifically, the liquid with the preset liquid level height in the container is measured for multiple times by using the magnetic turning plate liquid level meter to be calibrated so as to obtain multiple first height indicating values,
a preset time interval is reserved between two adjacent times of obtaining the first height indication values;
the measuring of the liquid in the container having the preset liquid level height using a contrast level gauge for a plurality of times to obtain a plurality of second height indications,
and a preset time interval is reserved between two adjacent times of obtaining the second height indication values.
Specifically, the method further comprises the following steps:
enabling the liquid in the container to have a plurality of liquid level heights, and acquiring indicating value sub-errors corresponding to each liquid level height;
taking the maximum value of the indicating sub-errors as an indicating error;
and acquiring a calibration result of the magnetic turning plate liquid level meter to be calibrated according to the indicating value error.
Specifically, in the step of enabling the liquid in the container to have a plurality of liquid level heights and acquiring an indication sub-error corresponding to each liquid level height, acquiring the indication sub-error corresponding to a liquid level height includes:
respectively measuring the liquid in the container by using the magnetic turning plate liquid level meter to be calibrated and the comparison liquid level meter, wherein the measurement value of the magnetic turning plate liquid level meter to be calibrated is a third height indication value, and the measurement value of the comparison liquid level meter is a fourth height indication value;
and acquiring the indicating value sub-error of the magnetic turning plate liquid level meter according to the third height indicating value and the fourth height indicating value.
Specifically, the obtaining of the indication value sub-error of the magnetic turn-over plate liquid level meter according to the third height indication value and the fourth height indication value is specifically:
according to the formula Δ V ═ V1-V2Acquiring the indicating value error;
wherein, Δ V is the indication error of the magnetic turn-over plate liquid level meter;
V1indicating the third height;
V2indicating the third height.
In particular, the contrast level gauge is an armored drop-in level gauge or an ultrasonic level gauge.
The calibration method of the top-mounted magnetic turn-over plate liquid level meter provided by the invention can provide a basis for the calibration of the top-mounted magnetic turn-over plate liquid level meter which is fixedly mounted, the magnetic turn-over plate liquid level meter does not need to be detached from a container in the calibration process, the calibration can be completed when the magnetic turn-over plate liquid level meter is positioned in situ, manpower and material resources are saved, and the calibration of the magnetic turn-over plate liquid level meter which is fixedly mounted is greatly facilitated.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic flow chart of a calibration method for a top-loading type magnetic turn-over plate level gauge according to an embodiment of the present invention;
FIG. 2 is another schematic flow chart of a calibration method for a top-loading magnetic level gauge according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a calibration method for a top-loading magnetic level gauge according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a calibration method for a top loading type magnetic level gauge according to an embodiment of the present invention;
FIG. 5 is a schematic view of an ultrasonic level gauge installed in a calibration method of a top-loading type magnetic flip plate level gauge according to an embodiment of the present invention;
FIG. 6 is a schematic view showing the installation of an armored drop-in level gauge in the calibration method of a top-loading type magnetic turn-over plate level gauge according to an embodiment of the present invention.
Reference numerals and descriptions:
1-container, 2-ultrasonic level meter, 3-armored drop-in level meter.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given to the specific implementation, structure, features and effects of the calibration method for a top-loading type magnetic turn-over plate liquid level meter according to the present invention with reference to the accompanying drawings and preferred embodiments.
The embodiment of the invention provides a calibration method of a top-mounted magnetic turn-over plate liquid level meter, which comprises the following steps of:
step 1.1, measuring liquid with a preset liquid level height in a container 1 for multiple times by using a magnetic turning plate liquid level meter to be calibrated so as to obtain multiple first height indicating values;
step 1.2, measuring the liquid with the preset liquid level height in the container 1 for multiple times by using a comparison liquid level meter to obtain multiple second height indication values, wherein the precision grade of the comparison liquid level meter is higher than that of the magnetic turning plate liquid level meter to be calibrated;
step 1.3, obtaining the repeatability of the magnetic turn-over plate liquid level meter to be calibrated according to the plurality of first height indicating values and the plurality of second height indicating values;
and step 1.4, determining a calibration result of the magnetic turning plate liquid level meter to be calibrated according to the repeatability.
The to-be-calibrated magnetic turn-over plate liquid level meter is a top-mounted magnetic turn-over plate liquid level meter fixedly mounted on the container 1 and used for acquiring the liquid level height of liquid in the container 1 at any time. In step 1.1, when the magnetic turning plate liquid level meter to be calibrated is used for measuring the liquid level height of liquid each time, the liquid in the container 1 has the same liquid level height which is the preset liquid level height, and the reading obtained by the magnetic turning plate liquid level meter instead of calibration every time is the first height indicating value. In step 1.2, each time the liquid in the container 1 is measured by using the comparative liquid level meter, the liquid level height of the liquid in the container 1 is the same as the liquid level height of the liquid in the container 1 in step 1.1, and is also a preset liquid level height, wherein the preset liquid level height can be set according to the requirement. Wherein, the precision grade of the comparison liquid level meter is higher than that of the magnetic turning plate liquid level meter. Then, in step 1.3, the repeatability of the magnetic turn-over plate liquid level meter to be calibrated is calculated according to the obtained multiple second height indicating values of the first height indicating value, and finally the calibration result is determined according to the repeatability. Wherein, in step 1.1 and step 1.2, can use and wait to calibrate the side turn over board level gauge and acquire first height indicating value n times, use the contrast level gauge to acquire the second height indicating value n times, acquire first height indicating value and second height indicating value simultaneously at every turn, treat simultaneously at every turn and wait to calibrate magnetism and turn over board level gauge and contrast level gauge and read, and adjacent twice acquire first height indicating value or second height indicating value between have time interval. This implementation provides a calibration method of top mounted magnetism board level gauge that turns over, can turn over the board level gauge with the top mounted magnetism of fixed mounting in container 1 and calibrate, need not to turn over the board level gauge with magnetism and dismantle from container 1, saved manpower and materials, very big make things convenient for the calibration of top mounted magnetism board level gauge that turns over.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Specifically, as shown in fig. 2, the step 1.3 of obtaining the repeatability of the magnetic level gauge to be calibrated according to the plurality of first height indication values and the plurality of second height indication values specifically includes:
step 1.3.1, calculating a first average value according to a plurality of first height indicating values;
step 1.3.2, calculating a second average value according to a plurality of second height indicating values;
step 1.3.3, calculating an average error value according to the first average value and the second average value;
and step 1.3.4, determining the repeatability of the magnetic plate turning liquid level meter to be calibrated according to the plurality of first height indicating values, the plurality of second height indicating values, the average error value and the maximum allowable error of the magnetic plate turning liquid level meter to be calibrated.
Wherein, in step 1.3.1, the first average is an arithmetic average of the plurality of first altitude indications. In step 1.3.2, the second average is an arithmetic average of a plurality of second height indications. In step 1.3.3, the average error value may be the difference between the first average and the second average. In step 1.3.4, the repeatability may be calculated based on a first average value calculated from the plurality of first height indication values, or based on a second average value calculated from the plurality of second height indication values.
Specifically, the step 1.3.4 of determining the repeatability of the magnetic plate level meter to be calibrated according to the plurality of first height indication values, the plurality of second height indication values, the average error value and the maximum allowable error of the magnetic plate level meter to be calibrated specifically includes:
when the average error value is less than the maximum allowable error, according to a formula
Calculating the repeatability; wherein S isnIs the repeatability; viObtaining the first height indicating value of the magnetic turning plate liquid level meter to be calibrated for the ith time, wherein the unit of the first height indicating value is mm;
is the first average in mm.
In step 1.3.4, the average error value is determined between the maximum allowable error of the magnetic flap level gauge and the average error value
When in use
By using
And calculating repeatability, wherein | MPE | is the maximum allowable error of the calibration magnetic flip level meter. When in use
And the first average value of the first height indication value of the magnetic turning plate liquid level meter can be used as a reference to calculate the repeatability of the magnetic turning plate liquid level meter to be calibrated.
Specifically, the step 1.3.4 of determining the repeatability of the magnetic plate level meter to be calibrated according to the plurality of first height indications, the plurality of second height indications, the average error value, and the maximum allowable error of the magnetic plate level meter to be calibrated further includes:
when the average error is larger than the maximum allowable error, according to the formula
Calculating the repeatability; wherein S isnIs the repeatability; viObtaining the first height indicating value of the magnetic turning plate liquid level meter to be calibrated for the ith time in mm;
is the second mean value in mm.
Wherein the mean error is greater than the maximum allowable error, i.e.
The first average value of the magnetic turn-over plate liquid level meter to be calibrated is unreliable, and the precision grade of the comparison liquid level meter is greater than that of the magnetic turn-over plate liquid level meter to be calibrated, so that the second average values of a plurality of second height indicating values obtained by the comparison liquid level meter are more accurate, the reliability is higher, and therefore the liquid level meter is ready to be calibrated
Using the formula
And calculating the repeatability of the magnetic turn-over plate liquid level meter to be calibrated.
Specifically, the step 1.3.1 of calculating a first average value according to the plurality of first height indications specifically includes:
according to the formula
Acquiring the first average value; wherein,
is the first average value; n is the total number of times the first altitude indication is obtained; viObtaining a first height indicating value for the ith time of the magnetic turning plate liquid level meter to be calibrated;
the step 1.3.2 of calculating a second average value according to the plurality of second height indication values specifically includes:
according to the formula
Acquiring the second average value; wherein,
is the second average value; n is the total number of times the second altitude indication is obtained; v0iAnd obtaining the second height indication value for the ith time of the contrast liquid level meter.
Wherein the value of n is more than or equal to 6, n is preferably 10 in order to ensure the accuracy of repeated calculation, namely 10 times of measuring the liquid level of the liquid in the container 1 by using the magnetic turning plate liquid level meter to be calibrated to obtain 10 first height readings which are sequentially V1、V2……V10，
Is a V1、V2……V10Is calculated as the average of the counts. At the same time, the liquid level of the liquid in the container 1 is measured ten times by using a contrast level gauge to obtain 10 second height readings, each of which is V01、V02……V010，
Is a V01、V02……V010Is calculated as the average of the counts. And simultaneously reading the reading of the magnetic turning plate liquid level meter to be calibrated and the reading of the comparison liquid level meter when the ith first height indication value and the ith second height indication value are obtained.
In particular, step 1.1 uses the magnetic level gauge to be calibrated to measure the liquid with the preset liquid level height in the container 1 for a plurality of times so as to obtain a plurality of first height indication values,
a preset time interval is reserved between two adjacent times of obtaining the first height indication values;
said step 1.2 measuring a plurality of times the liquid within said container 1 having said predetermined liquid level height using a contrast level gauge to obtain a plurality of second height indications,
and a preset time interval is reserved between two adjacent times of obtaining the second height indication values.
In step 1.1 and step 1.2, the preset time interval between two adjacent times of acquiring the first height indication value and the second height indication value may be 2 minutes to 5 minutes, and the preset time interval is preferably 3 minutes, wherein the time for acquiring the first height indication value and the second height indication value each time is the same.
Specifically, as shown in fig. 3, the method further includes:
step 2.1, enabling the liquid in the container 1 to have a plurality of liquid level heights, and acquiring indication value sub-errors corresponding to each liquid level height;
step 2.2, taking the maximum value in the indicating value sub-errors as an indicating value error;
and 2.3, obtaining a calibration result of the magnetic turn-over plate liquid level meter to be calibrated according to the indicating value error.
In step 2.1, at least under three liquid level heights, indicating value sub-errors corresponding to the three liquid level heights are obtained. In step 2.2, the maximum value of the plurality of indication sub-errors is obtained as an indication error, in step 2.3, the calibration result of the magnetic flap level meter is determined according to the obtained indication error, specifically, the indication error can be compared with the maximum allowable error of the magnetic flap level meter with calibration, and when the indication error is larger than the maximum allowable error, the magnetic flap level meter to be calibrated is considered to be unqualified.
Specifically, as shown in fig. 4, in the step 2.1, the liquid in the container 1 has a plurality of liquid level heights, and obtaining the indication sub-error corresponding to each liquid level height, the obtaining of the indication sub-error corresponding to a liquid level height includes:
step 2.1.1, respectively measuring the liquid in the container 1 by using the magnetic turning plate liquid level meter to be calibrated and the comparison liquid level meter, wherein the measurement value of the magnetic turning plate liquid level meter to be calibrated is a third height indication value, and the measurement value of the comparison liquid level meter is a fourth height indication value;
and 2.1.2, acquiring the indicating value sub-error of the magnetic turn-over plate liquid level meter according to the third height indicating value and the fourth height indicating value.
Wherein, after the liquid in the container 1 is adjusted to a new liquid level height, the step 2.1.1 and the step 2.1.2 are required to be carried out when the indicating value sub-error is obtained. The liquid in the container 1 is required to have a plurality of liquid level heights, the operation valve can be operated, the liquid level in the container 1 is changed, after the liquid level is stable, the reading of the magnetic turning plate liquid level meter to be calibrated is read, and the phenomenon that the obtained third height indication error is too large due to the fact that the liquid level shakes is avoided. Similarly, after the liquid level of the liquid in the container 1 is stabilized, the liquid level reading of the liquid in the container 1 is measured by using the contrast liquid level meter. Thus, in step 1.1 and step 1.2, each time a first level indication and a second level indication are obtained, the first level indication and the second level indication are read with the liquid level stable, and each liquid level corresponds to a third level indication and a fourth level indication. In step 2.1.1 of this implementation, first, the liquid in the container 1 is adjusted to a first liquid level height, then the reading of the magnetic turn-over plate liquid level meter to be calibrated and the reading of the comparison liquid level meter are simultaneously read, a third height indication value and a fourth height indication value are simultaneously obtained, and then an indication value sub-error corresponding to the first liquid level height is calculated through step 2.1.2, wherein the indication value sub-error may be a difference value between the third height indication value and the fourth height indication value. And then, adjusting the height of the liquid in the container 1 to a second liquid level height, and repeating the step 2.1.1 and the step 2.1.2 to calculate a corresponding indicating value sub-error of the second liquid level height. Wherein, the indicating value sub-errors corresponding to at least three liquid level heights can be obtained.
Specifically, the step 2.1.2 of obtaining the indication value sub-error of the magnetic turn-over plate liquid level meter according to the third height indication value and the fourth height indication value specifically includes:
according to the formula Δ V ═ V1-V2Acquiring the indicating value error; wherein, the delta V is the indication error of the magnetic turning plate liquid level meter, and the unit is mm; v1Is the third height indication in mm; v2Is the third height indication in mm.
Wherein, the indication error of the magnetic turn-over plate liquid level meter to be calibrated is represented by a formula delta V-V1-V2And (4) calculating.
In particular, the contrast level is an armored drop-in level gauge 3 or an ultrasonic level gauge 2.
As shown in fig. 6, the armored drop-in type liquid level meter 3 is composed of a liquid level meter which is composed of a stainless steel gas collecting cylinder, a stainless steel capillary tube and a junction box. The sensor and the signal processing circuit are designed in the junction box, and the gas collecting cylinder is thrown into the measured liquid and is responsible for collecting pressure signals. The liquid level pressure signal that the gas in the gas collecting cylinder gathered passes through stainless steel capillary and transmits pressure for the sensor, has avoided the direct contact of sensor and measured medium from this, is adapted to occasions such as high temperature corrosivity. When calibrating a magnetic flap level gauge mounted on a tank 1 such as a tank, a tower, or a drum having an open top, a probe 31 of the armored immersion type level gauge 3 is inserted into the tank 1 and placed at the bottom of the tank 1 by using the armored immersion type level gauge 3 as a reference level gauge, and when the liquid level is stable, a second height indication value or a fourth height indication value is read. The uncertainty of the armored drop-in type liquid level meter 3 is one third lower than that of a magnetic turn-over plate liquid level meter to be calibrated, and the lower the uncertainty is, the higher the precision grade of the liquid level meter is. The ultrasonic liquid level meter 2 sends out high-frequency pulse sound waves which are sent out by the transducer, namely the probe 21, and the high-frequency pulse sound waves are reflected when meeting the surface of a measured object, and the reflected echoes which are reflected are received by the same transducer and converted into electric signals. The time between pulse transmission and reception is proportional to the distance of the transducer from the object surface. Wherein the ultrasonic level gauge 2 used has already been calibrated. In use, as shown in FIG. 5, the probe 21 of the ultrasonic level gauge 2 is placed on the top or bottom outside the container 1 with a couplant, and a second height indication or second height indication is read when the liquid level in the container 1 is stable. When using ultrasonic wave level gauge 2 to acquire the high registration value of second and the high registration value of fourth, need not to place its probe inside 1 container, directly outside 1 container alright measure, very big the measurement of liquid level height in 1 container of having made things convenient for.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A calibration method of a top-mounted magnetic turn-over plate liquid level meter is characterized by comprising the following steps:
measuring liquid with a preset liquid level height in the container for multiple times by using a magnetic turning plate liquid level meter to be calibrated so as to obtain multiple first height indicating values;
measuring the liquid with the preset liquid level height in the container for multiple times by using a comparison liquid level meter to obtain multiple second height indicating values, wherein the precision grade of the comparison liquid level meter is higher than that of the magnetic turning plate liquid level meter to be calibrated;
acquiring the repeatability of the magnetic turn-over plate liquid level meter to be calibrated according to the plurality of first height indicating values and the plurality of second height indicating values;
and determining the calibration result of the magnetic turning plate liquid level meter to be calibrated according to the repeatability.
2. The method of calibrating a top-loading magnetic tip plate level gauge of claim 1,
the obtaining the repeatability of the magnetic turn plate liquid level meter to be calibrated according to the plurality of first height indicating values and the plurality of second height indicating values specifically comprises:
calculating a first average value from a plurality of said first altitude indications;
calculating a second average value from a plurality of said second height indications;
calculating an average error value according to the first average value and the second average value;
and determining the repeatability of the magnetic plate level meter to be calibrated according to the plurality of first height indicating values, the plurality of second height indicating values, the average error value and the maximum allowable error of the magnetic plate level meter to be calibrated.
3. The method of calibrating a top-loading magnetic tip plate level gauge of claim 2,
the determining the repeatability of the magnetic level gauge to be calibrated according to the plurality of first height indication values, the plurality of second height indication values, the average error value and the maximum allowable error of the magnetic level gauge to be calibrated specifically includes:
when the average error value is less than the maximum allowable error, according to a formula
Calculating the repeatability;
wherein S isnIs the repeatability;
Viobtaining a first height indicating value for the ith time of the magnetic turning plate liquid level meter to be calibrated;
4. The method of calibrating a top-loading magnetic tip plate level gauge of claim 2,
the determining the repeatability of the magnetic level gauge to be calibrated according to the plurality of first height indications, the plurality of second height indications, the average error value, and the maximum allowable error of the magnetic level gauge to be calibrated further comprises:
when the average error is larger than the maximum allowable error, according to the formula
Calculating the repeatability;
wherein S isnIs the repeatability;
Viobtaining a first height indicating value for the ith time of the magnetic turning plate liquid level meter to be calibrated;
5. The method of calibrating a top-loading magnetic tip plate level gauge of claim 1,
the calculating the first average value according to the plurality of first altitude indications may specifically be:
according to the formula
Acquiring the first average value;
wherein,
is the first average value;
n is the total number of times the first altitude indication is obtained;
Viis that it isThe first height indicating value obtained by the magnetic turning plate liquid level meter for the ith time is to be calibrated;
the calculating the second average value according to the plurality of second height indication values specifically includes:
according to the formula
Acquiring the second average value;
wherein,
is the second average value;
n is the total number of times the second altitude indication is obtained;
V0iand obtaining the second height indication value for the ith time of the contrast liquid level meter.
6. The method of calibrating a top-loading magnetic tip plate level gauge of claim 1,
the liquid with the preset liquid level height in the container is measured for multiple times by using the magnetic turning plate liquid level meter to be calibrated so as to obtain multiple first height indicating values,
a preset time interval is reserved between two adjacent times of obtaining the first height indication values;
the measuring of the liquid in the container having the preset liquid level height using a contrast level gauge for a plurality of times to obtain a plurality of second height indications,
and a preset time interval is reserved between two adjacent times of obtaining the second height indication values.
7. The method of calibrating a top-loading magnetic tip plate level gauge of claim 1,
further comprising:
enabling the liquid in the container to have a plurality of liquid level heights, and acquiring indicating value sub-errors corresponding to each liquid level height;
taking the maximum value of the indicating sub-errors as an indicating error;
and acquiring a calibration result of the magnetic turning plate liquid level meter to be calibrated according to the indicating value error.
8. The method of calibrating a top-loading magnetic tip plate level gauge of claim 7,
the method for enabling the liquid in the container to have a plurality of liquid level heights and obtaining the indication sub-error corresponding to each liquid level height comprises the following steps:
respectively measuring the liquid in the container by using the magnetic turning plate liquid level meter to be calibrated and the comparison liquid level meter, wherein the measurement value of the magnetic turning plate liquid level meter to be calibrated is a third height indication value, and the measurement value of the comparison liquid level meter is a fourth height indication value;
and acquiring the indicating value sub-error of the magnetic turning plate liquid level meter according to the third height indicating value and the fourth height indicating value.
9. The method of calibrating a top-loading magnetic tip plate level gauge of claim 8,
the obtaining of the indication value sub-error of the magnetic turn-over plate liquid level meter according to the third height indication value and the fourth height indication value is specifically as follows:
according to the formula Δ V ═ V1-V2Acquiring the indicating value error;
wherein, Δ V is the indication error of the magnetic turn-over plate liquid level meter;
V1indicating the third height;
V2indicating the third height.
10. The method of calibrating a top-loading magnetic tip plate level gauge of claim 1,
the contrast liquid level meter is an armored drop-in type liquid level meter or an ultrasonic liquid level meter.
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