Small-capacity volume unit liquid adding unit for commodity density detection device

Abstract

The utility model discloses a small-volume unit liquid adding unit for a commodity density detection device, which comprises a leveling bottom plate and a volumetric flask, and is characterized in that the small-volume unit liquid adding unit further comprises a horizontal supporting table for placing the volumetric flask, and the horizontal supporting table is arranged on the leveling bottom plate through a lifting sliding table; the liquid adding device is arranged above the horizontal supporting table and is used for adding detected commodities into the volumetric flasks; the liquid level detection device is used for measuring the liquid level in the volumetric flask; and the measurement and control computer is connected with the liquid adding device and the liquid level detection device, and controls the liquid adding device to add liquid into the volumetric flask until the liquid level corresponding to the set volume is reached. According to the utility model, the lower limit detection range of the minimum sample size 5m1 of the density cup or the electronic densimeter is expanded, and meanwhile, the detection efficiency and accuracy are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and in particular to a small-capacity volume unit liquid adding unit for a commodity density detection device. Background Art

[0002] As consumers' expectations for the quality and quantity of prepackaged goods increase, so too do measurement issues. Prepackaged goods' outer packaging displays production information, including the net quantity. After production and packaging, prepackaged goods undergo sampling testing to verify the accuracy of the net quantity and ensure compliance with standards.

[0003] There are three measurement inspection methods for commodities with net content marked in volume units: 1. Absolute volume method, which is applicable to liquids with good fluidity and no sticking to the wall. 2. Density method and relative density method, which are applicable to evenly mixed liquids and those with poor fluidity. In the existing density method, the use of density cups and electronic densitometers requires the sample to be filled into the density cup or electronic densitometer. The sample volume is relatively small, and the electronic densitometer requires a minimum of 5ml of sample before it overflows for testing. Therefore, it is impossible to accurately test the net content of small-volume quantitatively packaged commodities with a net content marked between 2ml and 5ml on the market. Existing detection methods have difficulties in detecting the net content of small-volume quantitatively packaged commodities, especially for small-volume commodities of 2ml to 5ml, which cannot be accurately tested. Utility Model Content

[0004] The purpose of the utility model is to provide a small-capacity volume unit liquid adding unit for a commodity density detection device, which is aimed at marking quantitatively packaged commodities with small-capacity volume units of 2ml-10ml on the market, so as to detect the density of a single sample in each batch of washing separately. Under the premise of meeting the requirements of the specifications, the lower limit detection range of the minimum sample volume of 5ml of the density cup or electronic density meter is expanded to achieve the purpose of improving the detection efficiency and accuracy.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A small-capacity volume unit liquid adding unit for a commodity density detection device includes a leveling base and a volumetric flask, and is characterized in that the small-capacity volume unit liquid adding unit also includes a horizontal support platform for placing the volumetric flask, and the horizontal support platform is installed on the leveling base plate through a lifting slide; a liquid adding device, which is arranged above the horizontal support platform and is used to add the inspected commodity to the volumetric flask; a liquid level detection device, which is used to measure the liquid level in the volumetric flask; and a control unit, which is connected to the liquid adding device and the liquid level detection device, and controls the liquid adding device to add liquid to the volumetric flask until the liquid level corresponding to the set capacity is reached and then stops adding liquid.

[0007] Furthermore, the liquid adding device includes a micro-injection pump, a quantitative injection tube, an injection connecting tube and a precision injection needle, wherein the quantitative injection tube is used to load the inspected product, one end of the injection connecting tube is connected to the quantitative injection tube, and the other end is connected to the precision injection needle. A micro-injection pump is provided on the injection connecting tube, and the micro-injection pump is connected to the measurement and control computer, which controls the liquid adding operation of the volumetric flask.

[0008] Furthermore, the leveling base plate is further provided with a bracket, which is located on one side of the horizontal support platform and is used to support and fix the precision injection needle.

[0009] Furthermore, a thermometer is provided on the quantitative injection tube for measuring the temperature of the inspected product.

[0010] Furthermore, a liquid collector is provided on the bracket. The liquid collector is located between the volumetric flask and the precision injection needle and is used to catch excess dripping liquid to ensure detection accuracy.

[0011] Specifically, the liquid collector is connected to a measurement and control computer and pops out to collect liquid leaking from the liquid filling device after the volumetric flask reaches a set volume. Initially, the liquid collector is retracted to avoid disrupting the normal filling process. When the inspected product in the volumetric flask reaches the set volume, the measurement and control computer controls the liquid collector to pop out via a control line to catch any excess liquid that may drip due to the high viscosity of the inspected product. In this popped-out state, the liquid collector is positioned between the volumetric flask and the precision injection needle.

[0012] Furthermore, the liquid level detection device includes a CCD camera, a horizontal support platform is located on the right side of the leveling base plate, and the CCD camera is installed on the left side of the leveling base plate through a camera focus module slide rail. The camera focus module slide rail is connected to the measurement and control computer through a servo controller so that the horizontal center line of the CCD camera is always aligned with the scale line of the volumetric flask, for real-time monitoring of the liquid level of the volumetric flask.

[0013] Furthermore, the liquid level detection device also includes a light source board, which is located on the right side of the leveling base plate and provides lighting conditions for the CCD camera to capture the target image.

[0014] The utility model has at least one of the following advantages:

[0015] The utility model improves the accuracy of liquid addition in small-capacity volume units by adopting a measurement and control computer in conjunction with a liquid adding device and a liquid level detection device, thereby enabling the density of small-capacity volume units with quantitative labels to be accurately detected; secondly, the addition of a lifting slide facilitates the application of volumetric flasks of different specifications in the density detection of volume units with quantitative labels, thereby improving the accuracy of density detection; the design of the liquid collector solves the problem of continuous dripping of the inspected product caused by gravity factors, making the density detection process more accurate and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a small-capacity volume unit liquid adding unit for a commodity density detection device.

[0017] In the figure: 1. Micro-injection pump; 2. CCD camera; 3. Injection connecting tube; 4. Lifting slide; 5. Precision injection needle; 6. Light source board; 7. Liquid collector; 8. Bracket; 9. Horizontal support; 10. Leveling base plate; 11. Volumetric flask; 12. Camera focus module slide rail; 13. Display; 14. Measurement and control computer; 15. Electronic balance; 16. Printer; 17. Thermometer; 18. Inspected goods; 19. Servo controller; 20. Quantitative injection tube. DETAILED DESCRIPTION

[0018] The following is a further detailed description of a small-capacity volume unit liquid adding unit for a commodity density detection device proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will become clearer. It should be noted that the drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0019] The utility model is a small-capacity volume unit liquid adding unit for a commodity density detection device, comprising a leveling base plate 10 and a volumetric flask 11, the volumetric flask being marked with a scale corresponding to a set capacity, and characterized in that the small-capacity volume unit liquid adding unit also includes a horizontal support platform 9 for placing the volumetric flask 11, the horizontal support platform 9 being mounted on the leveling base plate 10 through a lifting slide 4; a liquid adding device, the liquid adding device being arranged above the horizontal support platform 9, for adding the inspected commodity to the volumetric flask 11; a liquid level detection device, for measuring the liquid level in the volumetric flask 11; a measurement and control computer 14, connected to the liquid adding device and the liquid level detection device, for controlling the liquid adding device to add liquid to the volumetric flask until the liquid level corresponding to the set capacity is reached and then the liquid addition is stopped.

[0020] The liquid level detection device may be a liquid level sensor installed at a scale position, or a CCD camera for detecting the liquid level.

[0021] Among them, the liquid adding device includes a micro-injection pump 1, a quantitative injection tube 20, an injection connecting tube 4 and a precision injection needle 5, wherein the micro-injection pump 1 is used to control the injection volume and injection speed, the quantitative injection tube 20 is used to load the inspected product 18, and the injection connecting tube 4 is connected to the quantitative injection tube 20 on one side and the precision injection needle 5 on the other end.

[0022] The following is a detailed description of an embodiment of the present invention based on the accompanying drawings. This embodiment relates to an automatic density detection device for commodities with quantitative quantities marked in volume units, and the present invention claims protection for its liquid adding unit.

[0023] like Figure 1As shown, an automatic detection device for the density of quantitative commodities marked with capacity and volume units includes a volumetric flask 11 with a scale corresponding to the set capacity marked on the volumetric flask, and a CCD camera 2, whose horizontal center line is always aligned with the scale line of the volumetric flask 11, for real-time monitoring of the liquid level of the volumetric flask 11. When the curved liquid surface in the volumetric flask 11 is tangent to the scale line of the volumetric flask, it is determined that the set capacity has been reached. The camera focus module slide 12 is used to drive the CCD camera 2 to move up and down until it is level with the scale line of the volumetric flask 11. The liquid adding device includes a micro-injection pump 1, a quantitative injection tube 20, an injection connecting tube 3 and a precision injection needle 5, wherein the micro-injection pump 1 is used to control the injection volume and injection speed, the quantitative injection tube 20 is used to load the inspected commodity 18, the injection connecting tube 3 is connected to the quantitative injection tube 19 on one side and the precision injection needle 5 on the other end, and the micro-control pump 1 is used to perform liquid addition operations on the volumetric flask 11 according to the liquid addition information issued by the measurement and control computer 14. The light source board 6 is located on the left side of the leveling base plate 10 and provides a clean background and suitable lighting conditions for the CCD camera 2 to capture the target image. The electronic balance 15 is used to weigh the volumetric flask 11 before and after the addition of liquid. The measurement and control computer 14 is used to calculate the relative density of the inspected product 18 by subtracting the first reading of the electronic balance 15 before the addition of liquid to the volumetric flask 11 and the second reading of the electronic balance 15 after the addition of liquid to the volumetric flask 11.

[0024] The liquid-adding device includes a microinjection pump 1, a quantitative injection tube 20, an injection connecting tube 4, and a precision injection needle 5. The microinjection pump 1 is used to control the injection volume and injection speed. The quantitative injection tube 20 is used to load the inspected product 18. One end of the injection connecting tube 4 is connected to the quantitative injection tube 20, and the other end is connected to the precision injection needle 5. The micro-control pump 1 is used to add liquid to the volumetric flask 11 according to the liquid addition information issued by the measurement and control computer 14.

[0025] When adding liquid to the volumetric flask 11, the liquid collector 7 is in a retracted state. The lifting slide 4 controls the volumetric flask 11 to move upward until the precision injection needle 5 is below the scale line on the volumetric flask 11. The liquid adding device injects liquid into the volumetric flask 11 at a preset injection speed. The lifting slide 4 controls the bottom end of the precision injection needle 5 to be below the scale line on the volumetric flask 11 until the liquid level in the volumetric flask 11 reaches approximately 90% of the target level. The lifting slide 4 controls the volumetric flask 11 to move downward until the mouth of the volumetric flask 11 is 5-6 cm from the bottom of the precision injection needle 5. The liquid adding device adds liquid dropwise to the volumetric flask 11 until the liquid level in the volumetric flask reaches the target level. The measurement and control computer controls the liquid adding device to stop adding liquid and controls the liquid collector 7 to switch to the ejected state.

[0026] This embodiment further includes: a bracket 8 located on one side of the horizontal support platform, for supporting and fixing the precision injection needle 5.

[0027] This embodiment further includes: a light source board 6, which is used to provide a clean background and appropriate light intensity for the CCD camera 2 to capture the target image.

[0028] The measurement and control computer 14 performs a difference process on the first indication information and the second indication information to obtain the mass of the liquid added to the volumetric flask 11, and obtains the relative density of the inspected product 18 in conjunction with the volume of the liquid added to the volumetric flask 11.

[0029] This embodiment further includes: a display 13 , which is connected to the measurement and control computer 14 and is used to display the relative density detected by the measurement and control computer 14 .

[0030] The printer 16 is used to print a net content measurement inspection report of the inspected commodity 18 .

[0031] In summary, when the device is performing density detection, the measurement and control computer 14 first reads and records the indication of the thermometer 17. If the temperature of the inspected product 18 is within the temperature specified by the detection conditions, the volumetric flask 11 is placed on the electronic balance 15, and the measurement and control computer 14 controls to turn on the electronic balance 15 and the light source board 6, and reads and saves the indication of the electronic balance 15, that is, the first indication information; then the volumetric flask 11 is placed on the horizontal support 9, and the lifting slide 4 rises to different heights according to the specifications of the volumetric flask 11, that is, it rises to the bottom of the precision injection needle 5, and monitors whether the volumetric flask 11 is placed in the appropriate position (the precision injection needle 5 is located directly above the volumetric flask 11). If the position is incorrect, the volumetric flask 11 needs to be adjusted to the specified position, and then the lifting slide 4 continues to rise until the bottom of the precision injection needle 5 is placed near the target scale line to prevent liquid splashing and hanging on the wall; the measurement and control computer 14 sends The signal controls the microinjection pump 1 to start adding liquid at the set flow rate and injection volume. During the addition process, the measurement and control computer 14 controls the camera focus module 12 to move up and down through the servo controller 19 to ensure that the CCD camera 2 is level with the liquid level. After the liquid is added to 85%~95% of the target liquid level, the measurement and control computer 14 controls the lifting slide 4 to move down to 5~6 cm away from the bottom of the precision injection needle 5. The microinjection pump 1 adds liquid drop by drop until the CCD camera 2 monitors that the liquid level has reached the target scale. The measurement and control computer 14 controls the microinjection pump 1 to stop adding liquid. At the same time, the liquid collector 8 is converted to a pop-up state to collect excess dripping liquid. The volumetric flask 11 after the addition is completed is moved to the electronic balance 15. The measurement and control computer 14 reads and saves the second reading information, calculates the mass of the added liquid, and calculates the density of the inspected product 18 based on the volume of the added liquid. Finally, the measurement and control computer 14 controls the printer 16 to print the test report.

[0032] The embodiment uses a liquid adding device with controllable flow rate, reduces the complexity of the device, and increases the automation degree of the density detection work;Secondly, the increase of the lifting slide table facilitates the application of different specifications of the volumetric flask to the density automatic detection of the volume unit marked quantitative commodity, and improves the accuracy of the density detection;The design of the liquid collector solves the problem of continuous dripping of the detected commodity caused by gravity, so that the density detection process is more accurate and efficient.

[0033] It should be noted that although some control methods are described in this embodiment, the utility model only relates to its liquid adding unit, and those skilled in the art should know that in the liquid adding unit of the utility model, the measurement and control computer can only send a signal to stop the liquid adding device when the liquid level reaches the scale, and other control methods of the measurement and control computer are only to expand the use of the utility model, and are not the protection subject of the utility model. Therefore, the measurement and control computer of the utility model can also be replaced by a simple controller. The test of the liquid level can also be realized by using a liquid level sensor, when the liquid level reaches the scale, the liquid level sensor sends a signal, and the controller receives the signal and sends a stop liquid adding instruction to control the micro control pump 1 to stop working.

[0034] In this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0035] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "height", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0036] In the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as limiting the present invention. After reading the above description, various modifications and alternatives to the present invention will be readily apparent to those skilled in the art. Therefore, the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A small volume unit liquid adding unit for commodity density detection device, comprising a leveling bottom plate and a volumetric flask, characterized in that The small-capacity volume unit liquid adding unit also includes a horizontal support platform for placing the volumetric flask, and the horizontal support platform is installed on the leveling base plate through a lifting slide; a liquid adding device, which is arranged above the horizontal support platform and is used to add the inspected goods to the volumetric flask; a liquid level detection device, which is used to measure the liquid level in the volumetric flask; and a measurement and control computer connected to the liquid adding device and the liquid level detection device, controlling the liquid adding device to add liquid to the volumetric flask until the liquid level corresponding to the set capacity is reached and then the liquid addition is stopped.

2. The small volume unit liquid adding unit according to claim 1, characterized in that: The liquid adding device includes a micro-injection pump, a quantitative injection tube, an injection connecting tube and a precision injection needle, wherein the quantitative injection tube is used to load the inspected goods, one end of the injection connecting tube is connected to the quantitative injection tube, and the other end is connected to the precision injection needle. A micro-injection pump is provided on the injection connecting tube, and the micro-injection pump is connected to the measurement and control computer.

3. The small volume unit liquid adding unit according to claim 2, characterized in that: The leveling base plate is further provided with a bracket, which is located on one side of the horizontal support platform and is used to support and fix the precision injection needle.

4. The small volume unit liquid adding unit according to claim 2, characterized in that: A thermometer is also provided on the quantitative injection tube.

5. The small volume unit liquid adding unit according to claim 3, characterized in that The bracket is also provided with a liquid collector, which is located between the volumetric flask and the precision injection needle.

6. The small volume unit liquid adding unit according to claim 1, characterized in that: The liquid level detection device includes a CCD camera, a horizontal support platform is located on the right side of the leveling base plate, and the CCD camera is installed on the left side of the leveling base plate through a camera focus module slide rail. The camera focus module slide rail is connected to the measurement and control computer through a servo controller so that the horizontal center line of the CCD camera is always flush with the scale line of the volumetric flask.

7. The small volume unit liquid adding unit according to claim 6, characterized in that: The liquid level detection device further includes a light source board located on the right side of the leveling base plate.

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