Tablet Medicine Inspection Equipment With Stroboscopic Light Source
Inspection principle
Drug safety has always been a key issue that people pay attention
to. The quality inspection of drugs is an important link in the
field of drug production, which provides an important guarantee for
the safe production and use of drugs. Appearance testing of drugs
is one of the important links in drug testing. Due to its large
demand and high quality testing requirements, the current manual
testing is always uncertain and lacks accuracy. Therefore, the
application of machine vision technology to the appearance
inspection of drugs can overcome many disadvantages of manual
inspection, improve its accuracy and work efficiency, and also
reduce the cost of enterprises, which is the development trend of
drug inspection in the future.
In the pharmaceutical industry, aluminum foil-packed capsule shells
are widely used. Many medicines are first filled with aluminum
foil-packed capsules and then given to patients, so their quality
is directly related to people's health. With the continuous
improvement of national drug testing standards and the increasing
testing volume of hard capsules, the traditional manual light
inspection method for quality testing of capsules has been
difficult to meet the needs of capsule manufacturers. At this time,
the use of relatively mature computer vision detection technology
to replace manual light inspection has great commercial prospects.
As a non-destructive and non-contact detection method, machine
vision can improve the production efficiency of capsules while
ensuring the overall quality of the capsules.
Inspection details
The system uses pattern matching and color recognition to determine
whether a package has the correct number and type of tablets. Check
the number of pills in the package and the color of each pill, and
issue an alarm or reject unqualified packages. The design of the
image acquisition device is as follows:
The capsules to be tested are poured into the blanking port. When
the capsules are placed on the turntable from the entrance, the
turntable is responsible for separating the capsules one by one and
placing them in the capsule slot. At this time, the conveyor chain
is in a state of continuous rotation. Since the photoelectric
sensor will detect the rotation of the conveyor chain, the light
source will stroboscopically illuminate the capsule when it passes
through the designated conveyor position. At this time, the
industrial camera will also start to capture the capsule image,
transfer the collected image data to the memory of the PC, and use
the capsule detection system installed on the PC to determine the
defects of the capsule image. When the judgment result of the
capsule is defective, it will output an air blow signal, and the
capsule with the problem will be driven into the unqualified
capsule waiting box, and the capsules that pass the inspection will
enter the qualified waiting box.
System parameters
Our design plan adopts multiple sets of high-pixel industrial
cameras and high-performance stroboscopic light sources to carry
out a full range of visual detection for the appearance defects of
the bottle body.The equipment can realize 7*24 hours of operation,
and the unqualified products can be automatically rejected online.
| Name | Tablet Medicine Inspection Equipment | Size | 2000*1200*1850mm |
| Inspect | Barcode for products | Speed | 150-300/min |
| Current | 3kw-5kw | Air pressure | 0.5~0.8MPa |
| Voltage | adapt to national standards | Accuracy | 99.5% |
| Working temperature | -20℃ ~ 60℃ | Working humidity | Below 50% relative humidity
|
Algorithm processing
In the whole image processing process, the image sensor CCD image
sensor is used to obtain the image first, and the image is
converted into a digital signal that can be recognized and run by
the computer or microprocessor, so that the capsule image is
converted into a digital image through the A/D converter. . After
the image is acquired, the capsule is preprocessed (filtering,
image enhancement, etc.), feature extraction, classification and
recognition of the capsule image.
For the detected unqualified capsules, the detection system sends a
signal to the PLC at this time, indicating that damaged capsules
are detected, and the relay needs to be removed to put the
unqualified products into the waste tank. Algorithm analysis of
capsule detection: After the capsule is filled by the filling
machine, the capsule body and the capsule cap are in good
agreement. During the detection process, the capsule may be damaged
and surface wear due to human factors, machine failure, stack
pressure and other factors. . According to the degree of damage and
wear, the system must remove those capsules that are damaged or
more worn, and those damaged or worn capsules that are less damaged
or worn but invisible to the human eye can be regarded as qualified
capsules to reduce the production process. losses in.
Our advantages
