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Method for automatically detecting inclination of steel needle of injector by machine vision system

A machine vision system and automatic detection technology, applied in instruments, measuring devices, optical devices, etc., can solve the problems of inability to guarantee product qualification rate detection quality, low monitoring speed, high labor intensity, etc., and achieve the goal of reducing inspection labor intensity. Effect

Inactive Publication Date: 2012-01-04
WUXI ZHONGWANG 4D TECH
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Problems solved by technology

[0004] Aiming at the problems that the online detection of the inclination of the syringe steel needle in the prior art relies on manual detection, the workers are prone to visual fatigue, the labor intensity is high, the product qualification rate and detection quality cannot be guaranteed, and the monitoring speed is low. The present invention provides a machine vision system The automatic detection method for the inclination of the syringe steel needle greatly reduces the labor intensity of the workers for detection, and the detection accuracy is high and the speed is fast, which can effectively ensure the qualified rate of the manufactured products

Method used

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  • Method for automatically detecting inclination of steel needle of injector by machine vision system
  • Method for automatically detecting inclination of steel needle of injector by machine vision system
  • Method for automatically detecting inclination of steel needle of injector by machine vision system

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Effect test

Embodiment 1

[0032] Embodiment 1, the detection of the tilted product:

[0033] Such as figure 2 The image of the outwardly tilted needle is shown, and the solid line is the visual figure that the needle is inclined to the outside of its back.

[0034] Fix 4 Basler ACA640-100GM industrial cameras on both sides of the steel needle, 2 cameras on each side, and install the 2 cameras on each side at an interval of 45??. In this way, no matter which direction the steel needle is tilted, the camera can capture the tilted image of the steel needle. The distance between the camera and the side of the steel needle is about 20mm. The Schneider zoom lens is used, the focal length is adjusted to 16mm, the aperture is adjusted to the maximum value, and the exposure time is adjusted to 0.41ms. The camber angle detection accuracy is set to 0.5??, and the normal camber angle limit of qualified products is set to 10??. A special white LED surface light source is used to illuminate from the opposite sid...

Embodiment 2

[0039] Embodiment 2, to the detection of introversion product:

[0040] Such as image 3 The image of the outwardly tilting needle is shown, and the solid line is the visual figure that the needle is inclined to the inner side of its back.

[0041]Fix 4 Basler ACA640-100GM industrial cameras on both sides of the steel needle, 2 cameras on each side, and install the 2 cameras on each side at an interval of 45??. In this way, no matter which direction the steel needle is tilted, the camera can capture the tilted image of the steel needle. The distance between the camera and the side of the steel needle is about 20mm. The Schneider zoom lens is used, the focal length is adjusted to 16mm, the aperture is adjusted to the maximum value, and the exposure time is adjusted to 0.41ms. The inclination angle detection accuracy is set to 0.5??, and the normal inclination angle limit of qualified products is set to 10??. A special white LED surface light source is used to illuminate from...

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Abstract

The invention provides a method for automatically detecting the inclination of a steel needle of an injector by a machine vision system. The method comprises the following steps of: setting an inclination angle of the steel needle as a detection parameter; setting detection precision and qualified ranges of different detection parameters according to requirements of users; starting a camera to shoot an image of the online running steel needle in real time by an external trigger and control signal and transmitting the shot image to a computer for detection; extracting an image of the inclined steel needle by the computer through an image algorithm, and calculating two inclination modes; judging whether the steel needle is qualified or unqualified according to the calculated inclination angle; and rejecting the unqualified steel needle from an appointed material outlet by the external trigger and control signal. By the method, the precision and the speed of detection for the inclinationof the steel needle of the injector are high, and the yield rate of the steel needle can be guaranteed effectively.

Description

technical field [0001] The invention relates to the technical field of on-line detection by using a machine vision system, in particular to a method for automatically detecting whether the steel needle of a syringe is inclined by using a machine vision system at a production site of a steel needle of a syringe. Background technique [0002] At the site of the assembly workshop of the syringe steel needle in the assembly line, it is necessary to carry out online detection of whether the steel needle is tilted. In the prior art, the on-line detection of steel needle inclination is carried out manually, and about 80 people are arranged beside the steel needle production machine to detect and process the steel needle inclination, and the products are classified into qualified products according to the detection results (such as outward inclination < 10??, or inward slope <10??) and unqualified products (such as outward slope ≥ 10??, or inward slope ≥ 10??). Unqualified pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/26B07C5/34
Inventor 董仲伟
Owner WUXI ZHONGWANG 4D TECH
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