CN213067847U - Liquid level measurement calibrating device - Google Patents
Liquid level measurement calibrating device Download PDFInfo
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- CN213067847U CN213067847U CN202021986246.8U CN202021986246U CN213067847U CN 213067847 U CN213067847 U CN 213067847U CN 202021986246 U CN202021986246 U CN 202021986246U CN 213067847 U CN213067847 U CN 213067847U
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Abstract
The utility model relates to a calibration measurement technical field, concretely relates to liquid level measurement calibrating device, include: a tank containing a cavity for containing liquid; the laser ranging unit is arranged at the top of the tank body, and a signal receiving end of the laser ranging unit faces the bottom of the tank body; the laser reflection device is movably arranged in the cavity, and a signal emitting end of the laser reflection device faces the laser ranging unit; and the connecting interface is arranged on the side edge of the tank body and used for connecting the calibrated device.
Description
Technical Field
The utility model relates to a calibration measurement technical field, concretely relates to liquid level measurement calibrating device.
Background
The height of the liquid medium in the container is called the liquid level, and the instrument for measuring the liquid level is called a liquid level meter. The type of the liquid level meter comprises a tuning fork vibration type, a magnetic suspension type, a pressure type, ultrasonic waves, sonar waves, a magnetic turning plate, radar and the like. The metrological verification department needs to do calibration operation to some level gauges frequently in daily calibration work, and because the measuring range of different measurements of various level gauge measurement principles is different, therefore at present, the conventional way is to build a set of tank body, pipeline, cistern, pump valve system, will be examined the level gauge and install on the tank body, through the action of control pump valve, pour into corresponding water into the tank body, then reuse the steel plate chi to measure the height of water surface, carry out data comparison with the instrument of being examined, realize whole measurement calibration process. Because the range of the liquid level meter to be calibrated has a large range and a small range, in order to ensure the calibration precision, a plurality of steel plates serving as the standard devices are required, for example, when a 4-meter liquid level meter is calibrated, a 4-meter steel plate is required to serve as a standard measuring instrument. The liquid level meter with 0.5 meter range needs a steel plate ruler with 0.5 meter when being calibrated, otherwise, the metering precision is not enough. Because the range of the instrument to be calibrated changes frequently, in order to ensure the metering accuracy, a plurality of steel plate rulers are required to be used as standard measuring instruments, when the range of the liquid level meter is 4 meters or more, the steel plate rulers with the length of 4 meters or even longer are required to be used as the standard instruments, and a ladder is required to be manually built to read, so that the standard instruments are inconvenient to transport due to too long length when being traced to the source and calibrated to a higher metering department, and are extremely inconvenient to use on site. Meanwhile, the system adopts a steel plate ruler, so that reading needs manual operation, manual reading errors often exist, and randomness is brought to metrological verification work.
SUMMERY OF THE UTILITY MODEL
In view of the above technical defect, the utility model provides a liquid level measurement calibrating device, specifically: the method comprises the following steps:
a tank containing a cavity for containing liquid;
the laser ranging unit is arranged at the top of the tank body, and a signal receiving end of the laser ranging unit faces the bottom of the tank body;
the laser reflection device is movably arranged in the cavity, and a signal emitting end of the laser reflection device faces the laser ranging unit;
and the connecting interface is arranged on the side edge of the tank body and used for connecting the calibrated device.
Preferably, the liquid level measuring and calibrating device further includes a control system electrically connected to the calibrated device and the laser ranging unit, respectively.
Preferably, the liquid level measuring and calibrating device is characterized in that the height of the tank body is 5 meters.
Preferably, in the liquid level measuring and calibrating device, the measuring range of the laser ranging unit is 6 meters.
Preferably, the liquid level measuring and calibrating device further comprises:
an upper computer; for issuing operation instruction
A PLC control unit; the upper computer is connected and used for receiving the operation instruction and forming a first control instruction, a second control instruction and a third control instruction according to the operation instruction to output;
the medium input control end is connected with the output end of the PLC control unit and used for receiving the first control instruction and executing the action matched with the first control instruction;
the laser ranging unit is connected with the output end of the PLC control unit and used for receiving the second control instruction and executing the action matched with the second control instruction;
and the acquisition unit is connected with the output end of the PLC control unit and the calibrated device, and is used for receiving the third control instruction and executing an action matched with the third control instruction.
Preferably, in the above liquid level measurement calibration apparatus, the medium input control end at least includes a variable frequency pump and a regulating valve, the variable frequency pump is connected to the output end of the PLC control unit, and the regulating valve is connected to the output end of the PLC control unit.
Preferably, in the liquid level measuring and calibrating device, the laser distance measuring unit is mainly formed by an MSE-TS800 laser distance measuring instrument.
Preferably, the liquid level metering calibration device is characterized in that the PLC control unit is mainly formed by Siemens S7-300 PLC.
Compared with the prior art, the utility model has the advantages of:
by the technical scheme, the metering calibration work of the liquid level instrument by the existing metering verification department is more convenient, the real-time data recording of the metering site is more objective, and the random error influence of human factors and manual operation records is reduced. The method can be automatically operated and automatically recorded without manual intervention, recorded data can be conveniently exported to an excel table of a computer, and a metrological verification report can be automatically generated according to a preset template. The output value and the liquid level value of the liquid level instrument to be detected can be recorded in real time through the acquisition unit, and the operations of data recording, data comparison, minimum value, maximum value, error curve drawing, qualified and unqualified calibration judgment and the like in the metering calibration process can be realized by matching with an upper computer. The labor cost is greatly reduced while the efficiency is improved. Has economic and social benefits.
Drawings
Fig. 1 is a schematic structural view of a liquid level measuring and calibrating apparatus according to an embodiment of the present invention;
fig. 2 is a circuit structure diagram of a liquid level measuring and calibrating apparatus according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As shown in fig. 1, the utility model provides a liquid level measurement calibrating device, specifically: the method comprises the following steps:
the tank body 1 comprises a cavity for containing liquid; the tank body 1 is designed by an acrylic transparent shell, so that the liquid level process can be visualized; further, the height of the tank body is 5 meters.
The laser ranging unit 2 is arranged at the top of the tank body 1, and a signal receiving end of the laser ranging unit 2 faces the bottom of the tank body 1; furthermore, the measuring range of the laser ranging unit is 6 meters, and the measuring precision can reach 0.1 millimeter. Wherein, preferably, the laser ranging unit 2 is arranged on a floatable object, such as a floater. Further, the laser ranging unit is mainly formed by an MSE-TS800 laser range finder.
The laser reflection device 3 is movably arranged in the cavity, and a signal emitting end of the laser reflection device 3 faces the laser ranging unit 2;
and the connecting interface is arranged on the side edge of the tank body 1 and is used for connecting the calibrated device 4. The connecting interface can be arranged at the top of the tank body, the connecting interface can be arranged at the side part of the tank body, so that the side-mounted liquid level meter can be conveniently installed, and the connecting interface can also be arranged at the bottom of the tank body, so that the flange liquid level meter can be conveniently installed.
The liquid level measurement calibrating device has the working principle that: the method comprises the steps that a calibrated device is installed at a proper position, a medium (the medium can be water) is injected into a cavity, the laser reflection device is lifted by buoyancy of the medium in the process that the liquid level of the medium rises, the laser reflection device sends a measurement signal to the laser ranging unit, the laser ranging unit can obtain the current liquid level value according to the measurement signal, and the calibrated measuring device is calibrated by comparing the liquid level value with the liquid level value measured by the calibrated device.
As shown in fig. 2, the liquid level measuring and calibrating device further includes a control system electrically connected to the calibrated device and the laser ranging unit, respectively. Further, the control system further includes:
an upper computer; for issuing operation instruction
A PLC control unit; the upper computer is connected and used for receiving the operation instruction and forming a first control instruction, a second control instruction and a third control instruction according to the operation instruction to output; the PLC control unit is mainly formed by Siemens S7-300 PLC.
The medium input control end is connected with the output end of the PLC control unit and used for receiving the first control instruction and executing the action matched with the first control instruction;
the laser ranging unit is connected with the output end of the PLC control unit and used for receiving the second control instruction and executing the action matched with the second control instruction;
and the acquisition unit is connected with the output end of the PLC control unit and the calibrated device, and is used for receiving the third control instruction and executing an action matched with the third control instruction.
Furthermore, the medium input control end at least comprises a variable frequency pump and a regulating valve, the variable frequency pump is connected with the output end of the PLC control unit, and the regulating valve is connected with the output end of the PLC control unit. Further, the printing device also comprises a printing unit, and the printing unit is connected with the upper computer.
The utility model provides a liquid level measurement calibrating device adopts 220VAC power supply, the built-in 24VDC switching power supply of system ' S block terminal is as PLC the power supply of control unit, PLC the control unit adopts Siemens S7-300PLC as the host computer, be connected with laser ranging unit ' S communication output end through communication interface module, laser ranging unit adopts MSE-TS800 laser range finder can realize 0.1 millimeter ' S measurement accuracy, the collector of the output signal of by calibrating device adopts Agilent 34460A digital multimeter to gather, 4 ~ 20mA signals can be gathered to this multimeter, also can gather voltage signal such as 0 ~ 10V and can realize 6 reading accuracy half of position. The upper computer adopts configuration software visual programming to realize the whole metrological verification process, including verification setting, data recording, verification process control, verification report generation printing and other operations.
The calibration operation principle of the liquid level measurement calibration device is as follows: the output signal of the calibrated device is measured by the signal collector and then is converted into a digital signal which is collected by the PLC control unit in real time, and the output signal of the on-site laser ranging unit is also input into the PLC control unit. And the PLC control unit adjusts corresponding actions of the variable frequency pump and the regulating valve according to the signal fed back by the laser ranging unit to control the liquid level of the tank body to reach a preset calibration point. And then stopping the variable frequency pump and the regulating valve, and acquiring the output value of the output signal of the calibrated device and the output value of the laser ranging unit in real time as the original data record under the calibration point after the liquid level changes stably. And simultaneously uploading the data to an upper computer, and after the data is recorded by the upper computer, sending a corresponding operation instruction to a PLC control unit to perform subsequent verification and calibration steps until the whole verification and calibration process is finished. And then, the upper computer calculates the calibration error according to the data record of the whole process, automatically generates a metrological verification calibration report and sends the metrological verification calibration report to a printer for printing. The whole process is finished.
By the technical scheme, the metering calibration work of the liquid level instrument by the existing metering verification department is more convenient, the real-time data recording of the metering site is more objective, and the random error influence of human factors and manual operation records is reduced. The method can be automatically operated and automatically recorded without manual intervention, recorded data can be conveniently exported to an excel table of a computer, and a metrological verification report can be automatically generated according to a preset template. The output value (current or voltage signal) and the liquid level value of the detected liquid level instrument can be recorded in real time through the acquisition unit, and the liquid level value of the standard can be recorded in real time, and the operations of data recording, data comparison, minimum value, maximum value, error curve drawing, qualified and unqualified calibration judgment and the like can be realized in the metering calibration process by matching with an upper computer. The labor cost is greatly reduced while the efficiency is improved. Has economic and social benefits.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (6)
1. A liquid level gauge calibration device, comprising:
a tank containing a cavity for containing liquid;
the laser ranging unit is arranged at the top of the tank body, and a signal receiving end of the laser ranging unit faces the bottom of the tank body;
the laser reflection device is movably arranged in the cavity, and a signal emitting end of the laser reflection device faces the laser ranging unit;
connect the interface, set up in on the side of the jar body for connect by calibrating device, still include control system, respectively electric connection by calibrating device with the laser ranging unit, control system still includes:
an upper computer; for issuing an operation instruction;
a PLC control unit; the upper computer is connected and used for receiving the operation instruction and forming a first control instruction, a second control instruction and a third control instruction according to the operation instruction to output;
the medium input control end is connected with the output end of the PLC control unit and used for receiving the first control instruction and executing the action matched with the first control instruction;
the laser ranging unit is connected with the output end of the PLC control unit and used for receiving the second control instruction and executing the action matched with the second control instruction;
and the acquisition unit is connected with the output end of the PLC control unit and the calibrated device, and is used for receiving the third control instruction and executing an action matched with the third control instruction.
2. The apparatus of claim 1, wherein the height of the tank is 5 meters.
3. The liquid level measurement calibration device of claim 1, wherein the range of the laser ranging unit is 6 meters.
4. The liquid level metering calibration device of claim 1, wherein the medium input control end at least comprises a variable frequency pump and a regulating valve, the variable frequency pump is connected with the output end of the PLC control unit, and the regulating valve is connected with the output end of the PLC control unit.
5. The device as claimed in claim 1, wherein the laser ranging unit is formed primarily of an MSE-TS800 laser rangefinder.
6. The apparatus of claim 1, wherein the PLC control unit is formed primarily of a siemens S7-300 PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021986246.8U CN213067847U (en) | 2020-09-11 | 2020-09-11 | Liquid level measurement calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021986246.8U CN213067847U (en) | 2020-09-11 | 2020-09-11 | Liquid level measurement calibrating device |
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| CN213067847U true CN213067847U (en) | 2021-04-27 |
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| CN202021986246.8U Active CN213067847U (en) | 2020-09-11 | 2020-09-11 | Liquid level measurement calibrating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061704A (en) * | 2021-10-30 | 2022-02-18 | 华能洛阳热电有限责任公司 | Remote automatic calibration device for magnetic turning plate liquid level meter |
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2020
- 2020-09-11 CN CN202021986246.8U patent/CN213067847U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061704A (en) * | 2021-10-30 | 2022-02-18 | 华能洛阳热电有限责任公司 | Remote automatic calibration device for magnetic turning plate liquid level meter |
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