A fully automatic capacity verification device for small-capacity containers and a method of using the same

Abstract

The present invention provides a fully automatic capacity calibration device for a small-capacity container, comprising a high-precision balance, a water injection needle, a camera device, a temperature sensor, a water supply mechanism and a central control system; the water injection needle is connected to the water supply mechanism; the water injection needle is arranged on a lifting device; the water injection needle can be moved 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 located at the water source of the water supply mechanism, and the temperature sensor is used to detect the temperature of the water; the high-precision balance, the camera device, the temperature sensor, the water supply mechanism and the lifting device are all connected to the central control system for communication. Through the device of the present invention, the labor intensity of the inspection personnel is greatly reduced, the accuracy of the inspection is improved, the inspection results can be photographed and traced, making the inspection work more scientific, and providing a new intelligent tool for improving the quality inspection work in my country.

Description

Technical Field

[0001] The invention relates to the field of measurement and detection, and in particular to a full-automatic capacity verification device for a small-capacity container and a use method thereof. Background Art

[0002] Metrological verification refers to the evaluation of the metrological performance (accuracy, stability, sensitivity, etc.) of measuring instruments. The traditional verification method for single-marked volumetric flasks, measuring cups, and measuring cylinders uses the weighing method, that is, adding water to the scale position of the volumetric flask, and then weighing the added pure water on a high-precision balance to obtain the mass of the added pure water, and then converting the mass into volume, and comparing the converted volume with the volume of the volumetric flask. According to national verification regulations, each volumetric flask needs to be verified twice, and each test requires manual water addition, and the human eye determines whether the concave liquid surface coincides with the scale line. This cumbersome and repetitive operation method brings certain errors to the verification manual, and the quality of the verification results cannot be guaranteed.

[0003] With the rapid development of computer technology and image algorithm technology, the recognition algorithm of liquid level detection has also made great progress. Chinese Patent 201310276476.3, a system and method for image acquisition and recognition of capillary liquid surface data, the patent document mentions several patent applications related to liquid surface recognition. According to research, the existing liquid surface recognition device has several defects, including: it cannot realize automatic water injection, the camera device cannot automatically take pictures and move, and the liquid surface recognition can only recognize the concave liquid surface. Summary of the invention

[0004] In order to solve the problems in the background technology, the present invention provides a fully automatic capacity calibration device for a small-capacity container, comprising a high-precision balance, a water injection needle, a camera device, a temperature sensor, a water supply mechanism and a central control system;

[0005] The water injection needle is connected to the water supply mechanism; the water injection needle is arranged on the lifting device; the water injection needle can be moved to the top of the high-precision balance;

[0006] The camera device is arranged on the lifting device; the camera device can be moved to one side of the high-precision balance;

[0007] The probe of the temperature sensor is located at the water source of the water supply mechanism, and the temperature sensor is used to detect the temperature of the water;

[0008] The high-precision balance, the camera device, the temperature sensor, the water supply mechanism and the lifting device are all communicatively connected to the central control system.

[0009] Furthermore, it also includes a bracket; the bracket can be fixed on the disc of the high-precision balance.

[0010] Furthermore, the water injection needle is provided with a large-caliber water inlet and a small-caliber water inlet.

[0011] Furthermore, the water supply mechanism includes a water storage container and a peristaltic pump; the peristaltic pump is connected to the water injection needle and the water storage container through a catheter.

[0012] Furthermore, the peristaltic pump includes a large-flow peristaltic pump and a small-flow peristaltic pump; the small-flow peristaltic pump is controlled by PID.

[0013] Furthermore, the central control system includes a computer and a single-chip circuit board; the computer is communicatively connected with the single-chip circuit board;

[0014] The water supply mechanism is communicatively connected with the single-chip microcomputer circuit board.

[0015] Furthermore, it also includes a light source; the light source is located on one side of the high-precision balance.

[0016] The present invention also provides a method for using a fully automatic capacity calibration device for a small-capacity container, comprising the following steps:

[0017] S1. Place the volumetric flask to be calibrated on a high-precision balance; the computer sends a command to reset the high-precision balance to zero.

[0018] S2, the computer controls the camera to move from bottom to top to detect the bottom and scale line position of the volumetric flask;

[0019] S3, after obtaining the bottom and scale line positions of the volumetric flask, the computer controls the water injection needle to move to a position close to the bottom of the volumetric flask;

[0020] S4, the computer sends a signal to the single-chip microcomputer circuit board, and the single-chip microcomputer circuit board controls the high-flow peristaltic pump to start, and starts to inject a large amount of water into the volumetric bottle;

[0021] S5. When the water is filled 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 circuit board to stop the high-flow peristaltic pump;

[0022] S6, the computer controls the lifting mechanism to move the water injection needle to a position above the scale line;

[0023] S7, when reaching the designated position, the computer sends a signal to the single-chip microcomputer circuit board, and the single-chip microcomputer circuit board controls the small flow peristaltic pump to start and add water drop by drop;

[0024] S8, the camera device determines the height of the concave liquid surface of the water in the volumetric flask through an image algorithm, and when the concave liquid surface rises to coincide with the scale line, the computer sends a command to the single-chip microcomputer circuit board, and then the single-chip microcomputer circuit board controls the small flow peristaltic pump to stop working;

[0025] S9, the computer obtains the weight of the added pure water obtained by the high-precision balance and records the result;

[0026] S10. A temperature sensor is placed in the water storage container to detect the temperature of pure water. The temperature sensor sends the water temperature value to the computer through a signal. The computer converts the corresponding density value of the pure water and converts the volume of the added pure water, that is, the volume of the tested volumetric flask.

[0027] The device of the present invention can greatly reduce the labor intensity of testers, improve the accuracy of verification, and the verification results can be photographed and traced, making the verification work more scientific, thus providing a new intelligent tool for improving my country's quality inspection work. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic structural diagram of a fully automatic capacity calibration device for a small-capacity container provided by the present invention.

[0030] Reference numerals:

[0031] 1 Light source 2 Water injection needle 3 Fixing rod

[0032] 4 first lifting device 5 peristaltic pump 6 catheter

[0033] 7 water storage container 8 temperature sensor 9 single chip circuit board

[0034] 10 Temperature sensor communication interface 11 Second lifting device 12 Camera device

[0035] 12 Camera device DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] 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", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] The present invention provides a fully automatic capacity verification device for a small-capacity container, such as Figure 1 As shown, the water injection needle 2 is fixed on the fixed rod 3, and one end of the fixed rod 3 is connected to the lifting slide block of the first lifting device 4; the water injection needle 2 is provided with a large-aperture water inlet, which is connected to the large-flow peristaltic pump 5 through a conduit 6, and the large-flow peristaltic pump 5 is further connected to the water storage container 7 through the conduit 6; the water injection needle 2 is also provided with a small-aperture water inlet, which is connected to the small-flow peristaltic pump 5 through a conduit 6, and the small-flow peristaltic pump 5 is further connected to the water storage container 7 through the conduit 6; the peristaltic pump 5 is connected to the single-chip circuit board 9 through an electrical conductor; the single-chip circuit board 9 is further connected to the computer communication; the water injection needle 2 is located above the high-precision balance 13;

[0039] The water storage container 7 is provided with a temperature sensor 8; the temperature sensor 8 is connected to the computer through a temperature sensor communication interface 10;

[0040] The camera device 12 is fixedly connected to the lifting slider of the second lifting device 11; the camera device 12 is located on one side of the high-precision balance 13;

[0041] A light source 1 is also provided around the high-precision balance 13, and the light source 1 is a white LED light source;

[0042] Preferably, a bracket is customized according to the size of the disc of the high-precision balance 13, which can be fixed on the disc and the volumetric flask can be hung on the bracket to maintain a vertical state.

[0043] The method for using the above-mentioned fully automatic capacity verification device for a small-capacity container comprises the following steps:

[0044] S1. Place the volumetric flask to be calibrated on a high-precision balance; the computer sends a command to reset the high-precision balance to zero.

[0045] S2, the computer controls the camera to move from bottom to top to detect the bottom and scale line position of the volumetric flask;

[0046] S3, after obtaining the bottom and scale line positions of the volumetric flask, the computer controls the water injection needle to move to a position close to the bottom of the volumetric flask;

[0047] S4, the computer sends a signal to the single-chip microcomputer circuit board, and the single-chip microcomputer circuit board controls the high-flow peristaltic pump to start, and starts to inject a large amount of water into the volumetric bottle;

[0048] S5. When the water is filled 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 circuit board to stop the high-flow peristaltic pump;

[0049] S6, the computer controls the lifting mechanism to move the water injection needle to a position above the scale line;

[0050] S7, when reaching the designated position, the computer sends a signal to the single-chip microcomputer circuit board, and the single-chip microcomputer circuit board controls the small flow peristaltic pump to start and add water drop by drop;

[0051] S8, the camera device determines the height of the concave liquid surface of the water in the volumetric flask through an image algorithm, and when the concave liquid surface rises to coincide with the scale line, the computer sends a command to the single-chip microcomputer circuit board, and then the single-chip microcomputer circuit board controls the small flow peristaltic pump to stop working;

[0052] S9, the computer obtains the weight of the added pure water obtained by the high-precision balance and records the result;

[0053] S10. A temperature sensor is placed in the water storage container to detect the temperature of pure water. The temperature sensor sends the water temperature value to the computer through a signal. The computer converts the corresponding density value of the pure water and converts the volume of the added pure water, that is, the volume of the tested volumetric flask.

[0054] The present invention verifies through embodiments that the fully automatic capacity verification device for small-capacity containers can be actually applied to the verification of volumetric bottles.

[0055] Example 1

[0056] Select a single-marked volumetric flask with a standard capacity of 50 mL. Using the above device, the following data are obtained. The water temperature is 23.5°C, and the converted pure water density is 1.00354 g / cm 3 , the total weight of water injection is 49.9541g, and the calculated volume of pure water is 50.1309mL. The calculated volume, the operating software then uses the data of "Table 6 Single-line Volumetric Bottle Measurement Requirements List" in the National Metrology Verification Regulations of the People's Republic of China "JJG196-2006 Common Glass Measuring Instrument Verification Regulations" to determine whether the tested single-line volumetric bottle is qualified.

[0057] Example 2

[0058] Select a single-marked volumetric flask with a standard capacity of 20 mL. Using the above device, the following data are obtained: the water temperature is 25.3°C, and the converted pure water density is 1.00401 g / cm 3 , the total weight of water injection is 19.9835g, and the calculated volume of pure water is 20.0636mL. The calculated volume, the operating software then uses the data of "Table 6 Single-line Volumetric Bottle Measurement Requirements List" in the National Metrology Verification Regulations of the People's Republic of China "JJG196-2006 Common Glass Measuring Instrument Verification Regulations" to determine whether the tested single-line volumetric bottle is qualified.

[0059] The verification results of the above embodiment meet the requirements of the National Metrology Verification Regulations of the People's Republic of China "JJG 196-2006 Verification Regulations for Common Glass Measuring Apparatuses". This proves that the fully automatic capacity verification device for small-capacity containers of the present invention can be applied to the verification of volumetric bottles.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fully automatic capacity verification device for small-capacity containers, characterized in that: It includes a high-precision balance, a water injection needle, a camera device, a temperature sensor, a water supply mechanism and a central control system; The water injection needle is connected to the water supply mechanism; the water injection needle is arranged on the lifting device; the water injection needle can be moved to the top of 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 located at the water source of the water supply mechanism, and the temperature sensor is used to detect the temperature of the water; The high-precision balance, the camera device, the temperature sensor, the water supply mechanism and the lifting device are all connected to the central control system in communication; The water injection needle is provided with a large-caliber water inlet and a small-caliber water inlet; The water supply mechanism includes a water storage container and a peristaltic pump; the peristaltic pump is connected to the water injection needle and the water storage container through a catheter; the peristaltic pump includes a large flow peristaltic pump and a small flow peristaltic pump; the small flow peristaltic pump is controlled by PID; The large-aperture water inlet is connected to the large-flow peristaltic pump via a conduit, and the small-aperture water inlet is connected to the small-flow peristaltic pump via a conduit.

2. The fully automatic capacity verification device for small-capacity containers according to claim 1 is characterized in that: It also includes a bracket; the bracket can be fixed on the disc of the high-precision balance.

3. The fully automatic capacity verification device for small-capacity containers according to claim 1 is characterized in that: The central control system includes a computer and a single-chip circuit board; the computer is communicatively connected with the single-chip circuit board; The water supply mechanism is communicatively connected with the single-chip microcomputer circuit board.

4. The fully automatic capacity verification device for small-capacity containers according to claim 1 is characterized in that: It also includes a light source; the light source is located on one side of the high-precision balance.

5. A method for using a fully automatic capacity verification device for a small-capacity container, characterized in that: The steps include: S1. Place the volumetric flask to be calibrated on a high-precision balance; the computer sends a command to reset the high-precision balance to zero. S2, the computer controls the camera to move from bottom to top to detect the bottom and scale line position of the volumetric flask; S3, after obtaining the bottom and scale line positions of the volumetric flask, the computer controls the water injection needle to move to a position close to the bottom of the volumetric flask; S4, the computer sends a signal to the single-chip microcomputer circuit board, and the single-chip microcomputer circuit board controls the high-flow peristaltic pump to start, and starts to inject a large amount of water into the volumetric bottle; S5. When the water is filled 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 circuit board to stop the high-flow peristaltic pump; S6, the computer controls the lifting mechanism to move the water injection needle to a position above the scale line; S7, when reaching the designated position, the computer sends a signal to the single-chip microcomputer circuit board, and the single-chip microcomputer circuit board controls the small flow peristaltic pump to start and add water drop by drop; S8, the camera device determines the height of the concave liquid surface of the water in the volumetric flask through an image algorithm, and when the concave liquid surface rises to coincide with the scale line, the computer sends a command to the single-chip microcomputer circuit board, and then the single-chip microcomputer circuit board controls the small flow peristaltic pump to stop working; S9, the computer obtains the weight of the added pure water obtained by the high-precision balance and records the result; S10. A temperature sensor is placed in the water storage container to detect the temperature of pure water. The temperature sensor sends the water temperature value to the computer through a signal. The computer converts the corresponding density value of the pure water and converts the volume of the added pure water, that is, the volume of the tested volumetric flask.

Images