CN110715712A - Full-automatic capacity calibration device for small-capacity container and use method thereof - Google Patents

Full-automatic capacity calibration device for small-capacity container and use method thereof Download PDF

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Publication number
CN110715712A
CN110715712A CN201911114334.0A CN201911114334A CN110715712A CN 110715712 A CN110715712 A CN 110715712A CN 201911114334 A CN201911114334 A CN 201911114334A CN 110715712 A CN110715712 A CN 110715712A
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China
Prior art keywords
water
computer
precision balance
injection needle
circuit board
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CN201911114334.0A
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Chinese (zh)
Inventor
李晨
史去非
江泽润
陈焕廷
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Shenzhen Devo Instruments Co Ltd
BEIJING Institute OF METROLOGY
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Shenzhen Devo Instruments Co Ltd
BEIJING Institute OF METROLOGY
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Priority to CN201911114334.0A priority Critical patent/CN110715712A/en
Publication of CN110715712A publication Critical patent/CN110715712A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/0084Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume for measuring volume
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F19/00Calibrated capacity measures for fluids or fluent solid material, e.g. measuring cups

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)

Abstract

The invention provides a full-automatic capacity calibrating device for a small-capacity container, which comprises a high-precision balance, a water injection needle, a camera device, a temperature sensor, a water supply mechanism and a control system, wherein the high-precision balance is connected with the water injection needle; the water injection needle is connected with the water supply mechanism; the water injection needle is arranged on the lifting device; the water injection needle can move above the high-precision balance; the camera device is arranged on the lifting device; the camera device can be moved to one side of the high-precision balance; the probe of the temperature sensor is positioned at a water source of the water supply mechanism, and the temperature sensor is used for detecting the temperature of water; and the high-precision balance, the camera device, the temperature sensor, the water supply mechanism and the lifting device are all in communication connection with the central control system. The device of the invention greatly reduces the labor intensity of detection personnel, improves the accuracy of verification, can photograph and trace the source of the verification result, makes the verification more scientific and provides a new intelligent tool for improving the quality inspection work of China.

Description

Full-automatic capacity calibration device for small-capacity container and use method thereof
Technical Field
The invention relates to the field of metering detection, in particular to a full-automatic capacity calibration device for a small-capacity container and a use method thereof.
Background
Metrological verification is intended to assess the metrological performance (accuracy, stability, sensitivity, etc.) of a metrological instrument. The traditional method for detecting the single-groove volumetric flask, the measuring cup and the measuring cylinder adopts a measuring method, namely water is added to the groove position of the volumetric flask, then the added pure water is put into a high-precision balance to be weighed, the mass of the added pure water is obtained, the mass is converted into the volume, and the converted volume is compared with the volume of the volumetric flask. According to the national verification regulations, each volumetric flask needs to be verified for 2 times, water needs to be added manually for detection once, and the concave liquid level and the scale mark are judged to be overlapped by human eyes.
With the rapid development of computer technology and image algorithm technology, the liquid level detection recognition algorithm has a great deal of development. Chinese patent 201310276476.3, an image collecting and recognizing system and method for capillary liquid level data, discloses several application patents related to liquid level recognition. According to research, the existing liquid level identification device has several defects, including: automatic water injection cannot be realized, the camera device cannot automatically shoot and move, and the liquid level identification can only identify the concave liquid level.
Disclosure of Invention
In order to solve the problems in the background technology, the invention provides a full-automatic capacity calibration device for a small-capacity container, which comprises a high-precision balance, a water injection needle, a camera device, a temperature sensor, a water supply mechanism and a control system;
the water injection needle is connected with the water supply mechanism; the water injection needle is arranged on the lifting device; the water injection needle can move above the high-precision balance;
the camera device is arranged on the lifting device; the camera device can be moved to one side of the high-precision balance;
the probe of the temperature sensor is positioned at a water source of the water supply mechanism, and the temperature sensor is used for detecting the temperature of water;
the high-precision balance, the camera device, the temperature sensor, the water supply mechanism and the lifting device are all in communication connection with the central control system.
Further, the device also comprises a bracket; the support can be fixed on a disc of the high-precision balance.
Furthermore, the water injection needle is provided with a large-caliber water inlet and a small-caliber water inlet.
Further, the water supply mechanism comprises a water storage container and a peristaltic pump; the peristaltic pump is connected with the water injection needle and the water storage container through a conduit.
Further, the peristaltic pumps comprise a high-flow peristaltic pump and a low-flow peristaltic pump; the small flow peristaltic pump is controlled by PID.
Further, the central control system comprises a computer and a single chip microcomputer circuit board; the computer is in communication connection with the single chip microcomputer circuit board;
the water supply mechanism is in communication connection with the single chip microcomputer circuit board.
Further, the device also comprises a light source; the light source is positioned on one side of the high-precision balance.
The invention also provides a use method of the full-automatic capacity calibration device for the small-capacity container, which comprises the following steps:
s1, placing the volumetric flask to be verified on a high-precision balance; and sending an instruction by the computer to zero the high-precision balance.
S2, detecting the bottom and the position of the scale mark of the volumetric flask by moving the computer control camera from bottom to top;
s3, after the bottom and the scale mark position of the volumetric flask are obtained, the computer controls the water injection needle to move to a position close to the bottom of the volumetric flask;
s4, sending a signal to a single chip microcomputer circuit board by the computer, controlling a large-flow peristaltic pump to be started by the single chip microcomputer circuit board, and beginning to inject a large amount of water into the volumetric flask;
s5, when water is injected to the specified weight, the high-precision balance feeds back a signal to the computer, and the computer feeds back a signal to the single chip microcomputer circuit board to stop the work of the large-flow peristaltic pump;
s6, controlling the lifting mechanism to move the water injection needle to a position above the scale mark by the computer;
s7, when the computer reaches the designated position, the computer sends a signal to the single chip circuit board, the single chip circuit board controls the small-flow peristaltic pump to start, and one drop of water is added;
s8, the camera device judges the height of the concave liquid level of the water in the volumetric flask through an image algorithm, when the concave liquid level rises to coincide with the scale mark, the computer sends an instruction to the single chip circuit board, and then the single chip circuit board controls the small-flow peristaltic pump to stop working;
s9, acquiring the weight of the added pure water obtained by the high-precision balance by the computer; and recording the result;
s10, placing the temperature sensor in a water storage container to detect the temperature of the pure water, sending the water temperature value to a computer through signals by the temperature sensor, converting the water temperature value by the computer to obtain a corresponding density value of the pure water, and converting the volume of the added pure water, namely the volume of the detected volumetric flask.
The device of the invention greatly reduces the labor intensity of detection personnel, improves the accuracy of verification, can photograph and trace the source of the verification result, makes the verification more scientific and provides a new intelligent tool for improving the quality inspection work of China.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a full-automatic volume calibration device for small-volume containers according to the present invention.
Reference numerals:
1 light source 2 water injection needle 3 fixed rod
4 first lifting device 5 peristaltic pump 6 conduit
7 water storage container 8 temperature sensor 9 singlechip circuit board
10 temperature sensor communication interface 11 second elevating gear 12 camera device
12 image pickup device
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The invention provides a full-automatic volume calibrating device for a small-volume container, as shown in figure 1, a water injection needle 2 is fixed on a fixed rod 3, and one end of the fixed rod 3 is connected to a lifting slide block of a first lifting device 4; the water injection needle 2 is provided with a large-aperture water inlet, the large-aperture water inlet is connected with a large-flow peristaltic pump 5 through a conduit 6, and the large-flow peristaltic pump 5 is connected with a water storage container 7 through the conduit 6; the water injection needle 2 is also provided with a water inlet with a small aperture, the water inlet with the small aperture is connected with a peristaltic pump 5 with a small flow through a conduit 6, and the peristaltic pump 5 with the small flow is connected with a water storage container 7 through the conduit 6; the peristaltic pump 5 is connected with the singlechip circuit board 9 through an electric lead; the singlechip circuit board 9 is in communication connection with a computer; the water injection needle 2 is positioned above the high-precision balance 13;
a temperature sensor 8 is arranged in the water storage container 7; the temperature sensor 8 is in communication connection with a computer through a temperature sensor communication interface 10;
the camera device 12 is fixedly connected to the lifting slide block of the second lifting device 11; the camera device 12 is positioned on one side of the high-precision balance 13;
the periphery of the high-precision balance 13 is also provided with a light source 1, and the light source 1 is a white LED lamp light source;
preferably, a support is customized according to the size of the disc of the high-precision balance 13, can be fixed on the disc, and enables the volumetric flask to be hung on the support to keep a vertical state.
The use method of the full-automatic volume verification device for the small-volume container comprises the following steps:
s1, placing the volumetric flask to be verified on a high-precision balance; and sending an instruction by the computer to zero the high-precision balance.
S2, detecting the bottom and the position of the scale mark of the volumetric flask by moving the computer control camera from bottom to top;
s3, after the bottom and the scale mark position of the volumetric flask are obtained, the computer controls the water injection needle to move to a position close to the bottom of the volumetric flask;
s4, sending a signal to a single chip microcomputer circuit board by the computer, controlling a large-flow peristaltic pump to be started by the single chip microcomputer circuit board, and beginning to inject a large amount of water into the volumetric flask;
s5, when water is injected to the specified weight, the high-precision balance feeds back a signal to the computer, and the computer feeds back a signal to the single chip microcomputer circuit board to stop the work of the large-flow peristaltic pump;
s6, controlling the lifting mechanism to move the water injection needle to a position above the scale mark by the computer;
s7, when the computer reaches the designated position, the computer sends a signal to the single chip circuit board, the single chip circuit board controls the small-flow peristaltic pump to start, and one drop of water is added;
s8, the camera device judges the height of the concave liquid level of the water in the volumetric flask through an image algorithm, when the concave liquid level rises to coincide with the scale mark, the computer sends an instruction to the single chip circuit board, and then the single chip circuit board controls the small-flow peristaltic pump to stop working;
s9, acquiring the weight of the added pure water obtained by the high-precision balance by the computer; and recording the result;
s10, placing the temperature sensor in a water storage container to detect the temperature of the pure water, sending the water temperature value to a computer through signals by the temperature sensor, converting the water temperature value by the computer to obtain a corresponding density value of the pure water, and converting the volume of the added pure water, namely the volume of the detected volumetric flask.
The full-automatic capacity verification device for the small-capacity container can be practically applied to volumetric flask verification through embodiments.
Example 1
A single-reticle volumetric flask with the capacity standard of 50mL is selected, and the using method of the device is adopted to obtain the following data, wherein the water temperature is 23.5 ℃, and the converted pure water density is 1.00354g/cm3The total weight of the injected water was 49.9541g, and the calculated volume of pure water was 50.1309 mL. And (4) judging whether the volumetric flask with the single marking to be detected is qualified or not by the operation software according to the data of the national measurement and verification regulation of the people's republic of China "JJJG 196-2006 general glass measuring instrument verification regulation" in Table 6 list of measurement requirements of volumetric flasks with the single marking ".
Example 2
A single-reticle volumetric flask with the capacity standard of 20mL is selected, and the using method of the device is adopted to obtain the following data, wherein the water temperature is 25.3 ℃, and the converted pure water density is 1.00401g/cm3The total weight of the injected water was 19.9835g, and the calculated volume of pure water was 20.0636 mL. The calculated volume is judged by the operation software according to the data of the national measurement and verification regulation of the people's republic of China ' JJG196-2006 general glass measuring instrument verification regulation ' Table 6 list of measurement requirements of single-line volumetric flaskWhether the volumetric flask is qualified or not.
The verification results of the above embodiments meet the requirements of the national metrological verification regulation of the people's republic of China "JJJG 196-2006 common glass measuring instrument verification regulation". It is thus demonstrated that a fully automatic volumetric capacity calibration device for small-volume containers according to the invention can be used for volumetric flask calibration.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. The utility model provides a full-automatic capacity calibrating installation of small capacity container which characterized in that: the device comprises a high-precision balance, a water injection needle, a camera device, a temperature sensor, a water supply mechanism and a control system;
the water injection needle is connected with the water supply mechanism; the water injection needle is arranged on the lifting device; the water injection needle can move above the high-precision balance;
the camera device is arranged on the lifting device; the camera device can be moved to one side of the high-precision balance;
the probe of the temperature sensor is positioned at a water source of the water supply mechanism, and the temperature sensor is used for detecting the temperature of water;
the high-precision balance, the camera device, the temperature sensor, the water supply mechanism and the lifting device are all in communication connection with the central control system.
2. A fully automated small volume container capacity verification apparatus according to claim 1, wherein: the device also comprises a bracket; the support can be fixed on a disc of the high-precision balance.
3. A fully automated small volume container capacity verification apparatus according to claim 1, wherein: the water injection needle is provided with a large-caliber water inlet and a small-caliber water inlet.
4. A fully automated small volume container capacity verification apparatus according to claim 1, wherein: the water supply mechanism comprises a water storage container and a peristaltic pump; the peristaltic pump is connected with the water injection needle and the water storage container through a conduit.
5. The fully automated small volume container capacity verification apparatus according to claim 4, wherein: the peristaltic pump comprises a high-flow peristaltic pump and a low-flow peristaltic pump; the small flow peristaltic pump is controlled by PID.
6. A fully automated small volume container capacity verification apparatus according to claim 1, wherein: the central control system comprises a computer and a single chip microcomputer circuit board; the computer is in communication connection with the single chip microcomputer circuit board;
the water supply mechanism is in communication connection with the single chip microcomputer circuit board.
7. A fully automated small volume container capacity verification apparatus according to claim 1, wherein: also includes a light source; the light source is positioned on one side of the high-precision balance.
8. The use method of the full-automatic capacity verification device for the small-capacity container is characterized by comprising the following steps of:
s1, placing the volumetric flask to be verified on a high-precision balance; and sending an instruction by the computer to zero the high-precision balance.
S2, detecting the bottom and the position of the scale mark of the volumetric flask by moving the computer control camera from bottom to top;
s3, after the bottom and the scale mark position of the volumetric flask are obtained, the computer controls the water injection needle to move to a position close to the bottom of the volumetric flask;
s4, sending a signal to a single chip microcomputer circuit board by the computer, controlling a large-flow peristaltic pump to be started by the single chip microcomputer circuit board, and beginning to inject a large amount of water into the volumetric flask;
s5, when water is injected to the specified weight, the high-precision balance feeds back a signal to the computer, and the computer feeds back a signal to the single chip microcomputer circuit board to stop the work of the large-flow peristaltic pump;
s6, controlling the lifting mechanism to move the water injection needle to a position above the scale mark by the computer;
s7, when the computer reaches the designated position, the computer sends a signal to the single chip circuit board, the single chip circuit board controls the small-flow peristaltic pump to start, and one drop of water is added;
s8, the camera device judges the height of the concave liquid level of the water in the volumetric flask through an image algorithm, when the concave liquid level rises to coincide with the scale mark, the computer sends an instruction to the single chip circuit board, and then the single chip circuit board controls the small-flow peristaltic pump to stop working;
s9, acquiring the weight of the added pure water obtained by the high-precision balance by the computer; and recording the result;
s10, placing the temperature sensor in a water storage container to detect the temperature of the pure water, sending the water temperature value to a computer through signals by the temperature sensor, converting the water temperature value by the computer to obtain a corresponding density value of the pure water, and converting the volume of the added pure water, namely the volume of the detected volumetric flask.
CN201911114334.0A 2019-11-14 2019-11-14 Full-automatic capacity calibration device for small-capacity container and use method thereof Pending CN110715712A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114705265A (en) * 2021-07-09 2022-07-05 长春汇维科技股份有限公司 Irregular container measuring method and equipment

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CN104180878A (en) * 2014-08-26 2014-12-03 深圳市湘津石仪器有限公司 Container capacity automatic verification device and verification method thereof
CN104198330A (en) * 2014-08-26 2014-12-10 深圳市湘津石仪器有限公司 Float-type densitometer scale calibration device and calibration method thereof
CN204115827U (en) * 2014-08-26 2015-01-21 深圳市湘津石仪器有限公司 The automatic calibrating instrument of container capacity
CN110044448A (en) * 2019-05-29 2019-07-23 山西科致成科技有限公司 A kind of volumetric glass capacity automatic calibrator and its calibration method
CN210464615U (en) * 2019-11-14 2020-05-05 北京市计量检测科学研究院 Full-automatic capacity calibrating device for small-capacity container

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201569477U (en) * 2009-12-25 2010-09-01 山东建筑大学 Small measuring vessel automatic measurement calibration device
CN104180878A (en) * 2014-08-26 2014-12-03 深圳市湘津石仪器有限公司 Container capacity automatic verification device and verification method thereof
CN104198330A (en) * 2014-08-26 2014-12-10 深圳市湘津石仪器有限公司 Float-type densitometer scale calibration device and calibration method thereof
CN204115827U (en) * 2014-08-26 2015-01-21 深圳市湘津石仪器有限公司 The automatic calibrating instrument of container capacity
CN110044448A (en) * 2019-05-29 2019-07-23 山西科致成科技有限公司 A kind of volumetric glass capacity automatic calibrator and its calibration method
CN210464615U (en) * 2019-11-14 2020-05-05 北京市计量检测科学研究院 Full-automatic capacity calibrating device for small-capacity container

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114705265A (en) * 2021-07-09 2022-07-05 长春汇维科技股份有限公司 Irregular container measuring method and equipment

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