CN106289454B - Liquid level meter measuring ruler and liquid level meter calibration method applying same - Google Patents
Liquid level meter measuring ruler and liquid level meter calibration method applying same Download PDFInfo
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- CN106289454B CN106289454B CN201610679301.0A CN201610679301A CN106289454B CN 106289454 B CN106289454 B CN 106289454B CN 201610679301 A CN201610679301 A CN 201610679301A CN 106289454 B CN106289454 B CN 106289454B
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- 239000007788 liquid Substances 0.000 title claims abstract description 188
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 238000005259 measurement Methods 0.000 claims abstract description 22
- 230000003993 interaction Effects 0.000 claims abstract description 15
- 239000013049 sediment Substances 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 1
- 230000000007 visual effect Effects 0.000 claims 1
- 238000009825 accumulation Methods 0.000 abstract description 6
- 230000002265 prevention Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention discloses a liquid level meter measuring ruler and a liquid level meter calibration method using the same. The liquid level measuring ruler comprises a steel tape, a tape hammer, a steel tape control device and a man-machine interaction device, so that a measurer and the steel tape control device can timely control the speed of the ruler, and meanwhile, the problem of inaccurate liquid level measurement data caused by factors such as foundation settlement at the bottom of a container, container deformation, sediment accumulation at the bottom of the container and the like is avoided; the liquid level meter calibration method is based on the liquid level meter measurement ruler, and is characterized in that under different liquid levels of the same container, the liquid level of the container is respectively measured twice by using the fixed liquid level meter and the liquid level measurement ruler, errors are calculated by using an error formula, the reference height of the container does not need to be obtained in advance, the influence of inaccuracy of the reference height on a measurement result is eliminated, the aim of calibrating the error of the fixed liquid level meter is achieved, and the measurement work efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of liquid level measurement, in particular to a liquid level meter measuring ruler and a liquid level meter calibration method using the same, and especially relates to a liquid level meter measuring ruler of an oil container and a liquid level meter calibration method using the same.
Background
The liquid level measurement of the container generally adopts two liquid level measurement methods, namely a fixed liquid level meter and a portable metering device, wherein the portable metering device comprises a liquid level meter ruler (oil dipstick), a liquid level density comprehensive tester and the like. The fixed level gauge calibration method generally uses a portable level measurement device to calculate an error in comparison with a fixed level gauge, and the fixed level gauge error comparison method uses a null height method of a liquid surface from the top of a container or a real height method of the liquid surface from the bottom of the container to calculate the error. The traditional liquid level gauge (oil measuring gauge) consists of a steel tape and a gauge hammer, wherein the gauge hammer is vertically downwards placed into a container at the top of the container during measurement, whether the gauge hammer is contacted with the liquid level or the bottom of the container is judged through manual perception, and then the depth of the lower gauge is read to determine the liquid level value; the liquid level density comprehensive tester has the same structure and principle as the liquid level meter measuring ruler, and has the functions of liquid density measurement, temperature measurement and buzzer alarm in contact with the liquid level.
The defects of the traditional liquid level meter measuring ruler (oil dipstick) and the liquid level density comprehensive tester are that: when the scale hammer approaches the liquid level or the bottom of the container, a measurer cannot judge the distance from the scale hammer to the liquid level or the bottom of the container in advance, and the measurer cannot control the speed of the lower scale; the rule is also set down when the rule hammer contacts the liquid surface or the container bottom, which can cause inaccurate measurement. The error comparison method of the fixed liquid level meter has the following defects: when the liquid level gauge (dipstick) and the liquid level density comprehensive tester are used for measuring the liquid level of the container, the empty height method must obtain the reference height of the top of the container in advance, the real height method must obtain the reference height of the bottom of the container in advance, and the reference height may change greatly after the container runs for many years due to factors such as foundation settlement, container deformation, container bottom sediment accumulation and the like, so that the calibration of the liquid level gauge is inaccurate.
Disclosure of Invention
In view of the above, the invention provides a liquid level meter measuring ruler and a liquid level meter calibration method using the same, so as to solve the problem that the traditional liquid level meter measuring ruler (oil measuring ruler) and liquid level density comprehensive tester cannot judge the distance from a ruler hammer to the liquid level or the bottom of a container in advance, and then cannot control the speed of the lower ruler to cause inaccurate measurement; and the inaccurate calibration of the liquid level meter is caused by factors such as foundation settlement, container body deformation, container bottom sediment accumulation and the like of the container.
In a first aspect, there is provided a level gauge for measuring the level of a liquid in a container, the level gauge comprising:
a steel tape with a tape with graduations on which the length of the lower tape can be read;
the tape hammer is connected with the tape end of the steel tape entering the measuring container, so that the tape is ensured to be pulled by a heavy object to freely fall;
the steel tape control device is connected with the steel tape and used for controlling the lower speed and the lower length of the steel tape;
and the man-machine interaction device is connected with the ruler hammer and used for displaying the distance information from the ruler hammer to the liquid level or the bottom of the container and the image information of the liquid level or the bottom of the container.
Preferably, the rule hammer comprises:
the data acquisition device is used for acquiring the distance information from the ruler hammer to the liquid level or the bottom of the container and the image information of the liquid level or the bottom of the container, feeding the distance information back to the steel tape control device respectively and transmitting the distance information and the image information to the man-machine interaction device;
the scale hammer shell is a waterproof sealing shell, scales are arranged on the scale hammer shell, the data acquisition device is arranged in the scale hammer shell, and the scale hammer shell meets the requirements of safety, explosion prevention and water prevention.
Preferably, the minimum scale of the steel tape and the casing of the tape hammer is 1mm, and the liquid level meter measuring tape further comprises:
and the bracket is used for fixing the liquid level meter measuring ruler.
Preferably, the data acquisition device further comprises:
the liquid level distance detection device is an ultrasonic sensor and is used for collecting the distance from the scale hammer to the liquid level or the bottom of the container, and the resolution of the distance from the ultrasonic sensor to the liquid level or the bottom of the container is smaller than 1mm;
the liquid level and container image detection device is a camera with a light source and is used for acquiring image information of the liquid level or the bottom of the container;
wherein, the camera can be penetrated by transparent or semitransparent liquid by the self-contained light source.
A human-machine interaction device, comprising:
the display device is connected with the data acquisition device, and transmits the acquired distance information and the acquired image information to the display device, and the display device displays the distance information and the image information in real time;
the instruction input device is connected with the steel tape control device and can input control instructions according to actual demands.
Preferably, the man-machine interaction device further comprises:
and the alarm prompting device is used for alarming when the distance from the ruler hammer to the liquid level or the bottom of the container is 1-50 mm and prompting a measurer to manually control the ruler discharging speed.
Preferably, the steel tape control device is internally provided with an automatic control unit which is connected with the steel tape and can automatically control the down-take speed and the down-take length of the steel tape;
the automatic control unit can carry out comparison operation with a given value according to the distance information and the image information obtained by the data acquisition device, and output a control instruction, wherein the control instruction can automatically control the down-rule speed and the down-rule length of the steel tape.
In a second aspect, there is provided a method of calibrating a level gauge, comprising a level gauge scale as described above:
and the liquid level is measured by the fixed liquid level meter and the liquid level measuring ruler respectively, and the fixed liquid level meter is calibrated by the measured value of the fixed liquid level meter and the measured value of the liquid level measuring ruler.
Preferably, the method for calibrating the liquid level meter comprises the following steps: and under different liquid levels of the same container, respectively carrying out secondary measurement on the liquid level of the container by using a fixed liquid level meter and the liquid level measuring ruler. Recording the liquid level values of the fixed liquid level meter and the liquid level measuring ruler which are measured for the first time as H1 and H1 respectively; changing the liquid level height, carrying out secondary measurement on the liquid level of the container by using a fixed liquid level meter and the liquid level measuring ruler, and recording the liquid level values of the fixed liquid level meter and the liquid level measuring ruler which are measured for the secondary measurement as H2 and H2 respectively; the fixed level gauge is calibrated using the error equation Δ= (H2-H1) - (H2-H1).
The invention has the following beneficial effects:
in the liquid level meter measuring ruler, distance information from a ruler hammer to the liquid level or the bottom of a container and image information of the liquid level or the bottom of the container are collected through a ruler hammer, the distance information is fed back to a steel tape control device respectively, and the distance information and the image information are transmitted to a man-machine interaction device; the human-computer interaction device displays the distance information and the image information acquired by the ruler hammer in real time, a measurer and the steel tape control device can timely control the ruler discharging speed, and meanwhile, the problem of inaccurate liquid level measurement data caused by factors such as foundation settlement of the bottom of the container, deformation of the container, accumulation of sediment at the bottom of the container and the like can be avoided through the image information displayed by the human-computer interaction device.
The liquid level meter calibration method does not need to measure the reference height of a container measuring port at the top of the container and the reference height at the bottom of the container, eliminates the influence of inaccurate reference height on the calibration of the fixed liquid level meter, and greatly improves the measurement working efficiency.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a liquid level gauge of the present invention;
FIG. 2 is a schematic illustration of a level gauge calibration of an embodiment of the present invention;
FIG. 3 is a schematic illustration of a level gauge calibration according to another embodiment of the present invention.
Detailed Description
The present invention is described below based on examples, but it is worth noting that the present invention is not limited to these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. However, for the part not described in detail, the present invention is also fully understood by those skilled in the art.
Furthermore, those of ordinary skill in the art will appreciate that the drawings are provided solely for the purposes of illustrating the invention, features, and advantages thereof and that the drawings are not necessarily drawn to scale.
Meanwhile, unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".
FIG. 1 is a schematic view of the liquid level gauge of the present invention. As shown in fig. 1, the liquid level meter measuring tape comprises a steel tape 1, a steel tape control device 2, a tape hammer 3, a man-machine interaction device 4, a bracket 5 and a tape 6; the scale hammer 3 comprises a scale hammer shell 31 and a data acquisition device 32, the scale hammer shell 31 is a waterproof sealing shell, the data acquisition device 32 comprises a liquid level and container image detection device 32a and a liquid level distance detection device 32b, and the man-machine interaction device 4 comprises a display device 41, an instruction input device 42 and an alarm prompting device 43.
The liquid level and container image detecting device 32a is a camera with a light source, and the liquid level distance detecting device 32b is an ultrasonic sensor.
The steel tape 1 is fixed at the measuring port of the container by the bracket 5, the steel tape 1 is provided with a tape 6, the tape 6 is provided with scales, and the tape 6 displays the length of the lower tape; the scale hammer shell 31 is connected with the end of the scale belt 6 entering the measuring container; the ultrasonic sensor 32b is used for collecting distance information from the scale hammer 3 to the liquid level or the bottom of the container, the liquid level and container image detection device 51 is used for collecting image information of the liquid level or the bottom of the container, and the distance information and the image information are fed back to the display device 41; the measurer can control the down speed and the down length of the steel tape 1 according to the distance information and the image information observed by the display device 41. When the scale hammer 31 contacts the liquid level or the bottom of the container, the lower scale depth of the scale belt 6 and the scale of the scale hammer shell 31 are read, and the lower scale depth of the scale belt 6 and the scale of the scale hammer shell 31 are added to be the measured liquid level value, so that the liquid level measurement is completed.
Wherein, the liquid level and container image detecting device 32a and the liquid level distance detecting device 32b are all arranged in the scale hammer shell 31, the scale hammer shell 31 is a waterproof sealed shell, and the waterproof sealed shell needs to meet the requirements of safety, explosion prevention and water prevention; the scale 3 has a certain weight, and the scale housing 31 is also provided with scales.
The level and container image detection device 32a may penetrate transparent or translucent liquids. Meanwhile, it is preferable that the resolution of the liquid level distance detecting means 32b to measure the distance from the scale hammer 3 to the liquid level or the bottom of the container is less than 1mm.
Further, the liquid level meter measuring ruler of the invention is provided with a steel tape control device 2; the distance information from the measuring hammer 3 to the liquid level or the bottom of the container is fed back to the steel tape control device 2 through the liquid level and container image detection device 32a and the liquid level distance detection device 32b, and the steel tape control device 2 outputs control commands to control the measuring speed and the measuring length of the steel tape 1 through comparison and judgment with preset parameters.
Still further, the man-machine interaction device 4 includes an alarm prompting device 43, when the distance from the scale hammer 3 to the liquid level or the bottom of the container is 1-50 mm, the alarm prompting device 43 alarms, and is used for prompting the measuring personnel to manually control the speed of the scale, and the alarm prompting device 43 can alarm based on one or more of a buzzer, voice or flashing lights; the instruction input device 42 is connected with the steel tape control device, can input control instructions according to actual demands, and can be used for inputting control instructions such as the length of the lower tape, the speed of the lower tape, scram and the like.
In addition, the liquid level and container image detecting device 32a can detect whether the bottom of the container has deposit or deposit accumulation and deformation of the container body, and if the bottom of the container has deposit or deposit accumulation and deformation of the container body, the inaccuracy problem of the measured data can be avoided by changing the position of the liquid level meter ruler.
FIG. 2 is a schematic diagram of the calibration of a liquid level meter according to an embodiment of the present invention, as shown in FIG. 2, a fixed liquid level meter B is installed on one measuring port of a container A, and a liquid level meter measuring ruler C according to the present invention is installed on the other measuring port; in the case of the first liquid level D, the liquid level value measured by the fixed liquid level meter B is H1, and the liquid level value measured by the liquid level meter ruler C is H1; by changing the liquid level value, after the liquid level is stable, namely, the situation of the second liquid level E, the liquid level value measured by the liquid level meter B is fixed to be H2, and the liquid level value measured by the liquid level meter measuring ruler C is H2; and calculating an error value of the fixed liquid level meter B by using an error formula delta= (H2-H1) - (H2-H1), so as to achieve the purpose of calibrating the error of the fixed liquid level meter.
FIG. 3 is a schematic illustration of a level gauge calibration of another embodiment of the present invention; as shown in fig. 3, the fixed liquid level meter B and the liquid level meter measuring ruler C of the invention are arranged at the same measuring port on the container a, and meanwhile, the measurement process of the fixed liquid level meter B and the liquid level meter measuring ruler C of the invention is mutually independent; in the case of the first liquid level F, the liquid level value measured by the fixed liquid level meter B is H11, and the liquid level value measured by the liquid level meter C is H11; by changing the liquid level value, after the liquid level is stable, namely, the situation of the second liquid level G, the liquid level value measured by the fixed liquid level meter B is H21, and the liquid level value measured by the liquid level meter measuring ruler C is H21; and calculating an error value of the fixed liquid level meter B by using an error formula delta= (H21-H11) - (H21-H11), so as to achieve the purpose of calibrating the error of the fixed liquid level meter.
The above examples are merely illustrative embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that modifications, equivalent substitutions, improvements, etc. can be made by those skilled in the art without departing from the scope of the present invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (5)
1. A level gauge for measuring a level of a fluid in a container, comprising: the steel tape is provided with a tape, and scales are arranged on the tape;
the tape hammer is provided with a certain weight and is connected with the tape end of the steel tape entering the measuring container; wherein, the chi hammer still includes: a scale hammer housing; the scale hammer shell is provided with scales, and is a waterproof sealing shell;
the steel tape control device is connected with the steel tape and used for controlling the lower speed and the lower length of the steel tape; wherein the scale of the tape displays the lower tape length;
the man-machine interaction device is respectively connected with the ruler hammer and the steel tape control device and is used for visual display of distance information from the ruler hammer to the liquid level or the bottom of the container and image information of the liquid level or the bottom of the container, alarm prompt and input of control instructions; wherein, the man-machine interaction device includes: the display device is connected with the data acquisition device, and transmits the acquired distance information and the acquired image information to the display device, and the display device displays the data acquired by the data acquisition device in real time; the instruction input device is communicated with the steel tape control device and inputs control instructions according to actual demands; wherein the control instruction includes: one or more control instructions for the length of the lower ruler, the speed of the lower ruler and the sudden stop;
wherein, the man-machine interaction device still includes: the alarm prompting device is used for alarming when the distance from the ruler hammer to the liquid level or the bottom of the container is 1-50 mm and prompting a measurer to control the speed of the ruler; the rule hammer includes: the data acquisition device is used for acquiring the distance information from the ruler hammer to the liquid level or the bottom of the container and the image information of the liquid level or the bottom of the container, feeding the distance information back to the steel tape control device respectively and transmitting the distance information and the image information to the man-machine interaction device; wherein the data acquisition device is arranged in the scale hammer shell;
wherein, the data acquisition device includes: a liquid level distance detection device and a liquid level and container image detection device; the liquid level distance detection device is used for collecting the distance from the ruler hammer to the liquid level or the bottom of the container; the liquid level and container image detection device is used for acquiring image information of the liquid level or the bottom of the container;
the liquid level and container image detection device detects whether sediment or falling objects are accumulated at the bottom of the container or not and the container body deforms so as to change the position of the liquid level meter measuring ruler; wherein, liquid level and container image detection device includes: a camera with a light source; the liquid level distance detection device comprises: an ultrasonic sensor; the camera with the light source is used for collecting image information of the liquid level or the bottom of the container; the ultrasonic sensor is used for collecting the distance from the ruler hammer to the liquid level or the bottom of the container,
when the scale hammer contacts the liquid level or the bottom of the container, the length of the lower scale of the scale belt and the scale of the scale hammer shell are read, the depth of the lower scale and the scale of the scale hammer shell are added to be the measured liquid level value, and the liquid level measurement is completed.
2. The level gauge of claim 1, further comprising: and the bracket is used for fixing the liquid level meter measuring ruler.
3. The level gauge of claim 1, wherein the ultrasonic sensor measures a distance of the gauge hammer to the liquid surface or the bottom of the container with a resolution of less than 1mm.
4. The level gauge of claim 1, wherein the camera's own light source is transparent or translucent to liquids.
5. A method of calibrating a level gauge comprising the level gauge of any one of claims 1 to 4, comprising: under different liquid levels of the same container, respectively carrying out secondary measurement on the liquid level of the container by using a fixed liquid level meter and the liquid level measuring ruler; recording the liquid level values of the fixed liquid level meter and the liquid level measuring ruler which are measured for the first time as H1 and H1 respectively; changing the liquid level height, carrying out secondary measurement on the liquid level of the container by using a fixed liquid level meter and the liquid level measuring ruler, and recording the liquid level values of the fixed liquid level meter and the liquid level measuring ruler which are measured for the secondary measurement as H2 and H2 respectively; the fixed gauge is calibrated using the error equation Δ= (H2-H1) - (H2-H1).
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| CN112113526A (en) * | 2020-09-23 | 2020-12-22 | 中国核动力研究设计院 | Resin interface instrument test system and method |
| CN112461337A (en) * | 2020-11-16 | 2021-03-09 | 沈阳新石科技有限公司 | Oil and gas well liquid level instrument detection method |
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