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Automatic tap density measuring device

A technology of tap density and measuring device, which is applied in the direction of measuring device, specific gravity measurement, instrument, etc., can solve the problems of non-adjustable, limited application range, uneven surface of powder, etc., and achieve the effect of improving measurement accuracy and expanding application range

Pending Publication Date: 2019-06-14
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the upper surface of the powder after vibration is uneven, and the accuracy of the powder volume read by the operator using the scale line of the graduated cylinder is limited, which is easily affected by human factors, and is not suitable for other materials with large diameter, no scale line and opaque. container
In addition, the vibration process of different powder particles under different vibration conditions is different. Only reading the powder volume after vibration can not further understand and analyze the volume change process of powder particles.
Therefore, the existing tap density measuring instruments or devices have a low level of automation and a single function, which limits their scope of application.
[0003] The invention patent "powder tap density meter" (application publication number: CN102692360A) discloses a milk powder density meter, which uses a stepping motor to drive the cam to rotate, and divides the motor into three operating stages: acceleration, constant speed and deceleration, which strengthens the control The control accuracy of the cam rotation process, but the amplitude is fixed at 3mm and cannot be adjusted
These technical solutions still require manual reading of powder volume

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 , 2 As shown, an automatic tap density measuring device includes: a vibration mechanism, a distance measurement scanning device and a control system; the container is installed on the vibration mechanism; the vibration mechanism applies vertical mechanical vibration to the powder particles in the container; the distance measurement scanning The device is installed above the vibrating mechanism; the ranging scanning device performs ranging scanning on the contour of the powder accumulation surface in the container; the control system automatically controls and collects data on the vibrating mechanism and the ranging scanning device.

[0043] In order to further optimize the above-mentioned technical scheme, such as image 3 , 6 As shown, the vibration mechanism includes a container holder 11, a vibrating rod 12, a follower 13, a bearing follower 14, a vibration swing rod 15 and a mixing servo motor 16; the container holder 11 is placed with a container...

Embodiment 2

[0056] On the basis of Example 1, replace the bearing follower 14 with the follower 13, and open a waist-shaped hole on the bearing follower 14, the follower 13 is installed in the waist-shaped hole, and the vibration pendulum 15 swings back and forth , driving the vibrating rod 12 to slide up and down continuously to realize continuous vibration, and other contents are the same as those in Embodiment 1, and will not be repeated here.

[0057] Further, a spring 121 is provided between the container fixing base 11 and the anvil 112 during continuous vibration.

Embodiment 3

[0059] On the basis of Embodiment 1, the centerline of the output shaft of the stepper motor 22 is parallel to the centerline of the container, and the use of the circular scanning mode means that the centerline of the output shaft of the stepper motor 22 coincides with the centerline of the container, and the scanning swing arm 21 drives The laser ranging sensor 24 moves at a uniform speed along the circumference, and the laser ranging sensor 24 collects powder surface profile data on the circular trajectory;

[0060] In another embodiment, adopting the arc scanning mode means that the stepper motor 22 drives the laser distance measuring sensor 24 to reciprocate at a uniform speed along the arc, and the arc motion track passes through the center line of the container, and the laser distance measuring sensor 24 collects data in the arc. Powder surface profile data on line trajectories.

[0061] Such as Figure 5 As shown, the output shaft of the hybrid servo motor transmits p...

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Abstract

The invention discloses an automatic tap density measuring device. The automatic tap density measuring device comprises a vibration mechanism, a ranging scanning device and a control system, wherein acapacitor is arranged on the vibration mechanism; the vibration mechanism is used for applying vertical vibration action on powder particles in the container; the ranging scanning device is arrangedabove the vibration mechanism; the ranging scanning device is used for ranging and scanning the powder surface in the container; and the control system is used for performing automatic control and data acquisition on the vibration mechanism and the ranging scanning device. The automatic tap density measuring device can automatically adjust the vibration amplitude, frequency and vibration times andmonitor the changing process of powder piling density, thereby improving the measuring accuracy of the tap density and the automatic level of the operation process.

Description

technical field [0001] The invention relates to the technical field of instruments and meters, in particular to an automatic tap density measuring device. Background technique [0002] The tap density refers to the bulk density of the powder in the container after being tapped under specified conditions, and it is a comprehensive reflection of various physical properties such as powder particle size and distribution, particle shape and surface roughness. According to the national standard GB / T21354 and the international standard ISO3953, the tap density is generally measured by a special tap density measuring instrument according to the specified method and parameters, and manual operation is allowed in special cases. Existing tap density measuring instruments usually use a motor to drive the cam to rotate, and then drive the guide rod to slide upwards and then accelerate down at the profile section of the cam, impacting the anvil, generating rhythmic vibrations, and gradual...

Claims

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Application Information

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IPC IPC(8): G01N9/04
Inventor 李震洪添胜王建波薛秀云吕石磊温威宋淑然代秋芳刘宏伟
Owner SOUTH CHINA AGRI UNIV
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