Tag Archives: Defect Detection System

The Parts of a Visual Inspection System

Visual Inspection 05

Device vision is the use of computer vision applied to production and industrial automation. Machine vision systems and defect detection systems are an electronic replacement for less-than-perfect human inspectors.

These systems carry out accurate visual examinations throughout the manufacturing procedure to verify the accuracy and quality of work performed.

Manufacturing Uses

Visual Inspection 03These systems use smart digital electronic cameras and specialized image processing software to perform electronic inspections.

Typical applications consist of the validation of the presence and proper placement of parts, the verification that measurements fulfill specified tolerances, and the capture of data aspects such as identification numbers or lot IDs in manufactured items consisting of electronic parts, food, automobiles, and pharmaceuticals.

Basic Parts

Each application is special, so particular components are set up for each option. System elements fall under the following basic classifications:

Electronic cameras and Optics – Several digital/analog cameras and optics that take a picture of the part(s) being checked. These electronic cameras can be monochrome, a composite color, RGB color, variable-scan, progressive-scan, or line-scan depending upon the certain application requirement.

Lighting – The ideal lighting is essential for ideal illumination of the part so that the electronic camera can catch the Visual Inspection 04best possible image. Kinds of lighting consist of high-frequency fluorescent, LED, incandescent, and quartz-halogen fiber-optic.

Presence Sensing unit – This is a device that alerts the system when it senses that a part to be checked is approaching. It permits the machine vision system to obtain an image when a part is in the correct position.

Computer system Processor – The computer processor is usually a high-end PC or digital signal processor. A ruggedized computer system is typically required in manufacturing environments due to dirt, vibration and temperature level extremes.

Frame Grabber – A frame grabber interfaces the cam(s) to the computer processor. It takes the digital or analog image data offered by the camera and converts it into information for use by the computer system. Frame grabbers have been available in lots of configurations supporting various cameras and computer processor types.

Visual Inspection 05Device Vision Software application – Software can be found in numerous different forms. It is used for developing and executing programs, processing obtained image data, and making examination decisions such as pass/fail.

Network connection and Digital I/O – After the machine vision system completes its examination of a part, the examination results should be communicated to the system managing the manufacturing process. Usually, a network card or digital I/O user interface board is used to achieve this.
In conclusion, every manufacturing process is unique. It’s important to buy the proper elements for your particular operation to guarantee precise and trustworthy results from your machine vision system. Seek the advice from a professional to identify what’s right for you.