Types of vision systems available on the market.
Ngày: 17/11/2020
Current machine vision systems on the market are smart cameras, compact vision systems and PC-based vision systems. Consider all requirements including performance, accuracy, scalability, communication interfaces and user interfaces, while considering financial viability, technical requirements and choose the right product range.
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1. Smart cameras and sensors
Smart cameras are a simple solution that combines sensors, processors and I/O in a compact housing, typically no larger than a standard industrial camera. These products provide an intuitive user interface that is easy to use and train. To configure for an inspection task, a separate computer (e.g. a laptop) is required that is connected to the smart camera via a network interface, however, during runtime this connection is not required. Additional components such as expansion I/O, display units or expansion interface modules are also available.
Of course, it is possible to use multiple smart cameras in one application to solve more complex tasks, but since the main advantages of smart cameras are their compact design, high integration and easy communication of results, the main focus of using these products is on applications where all results can be extracted from the camera image with minimal computing power and transmitted directly to the system. You may also hear the term smart sensors. These are very similar to smart cameras, but they include the optics and lighting system in a pre-calibrated unit and often have fewer features.
2. Compact vision systems
Compact vision systems are based on embedded processing technology and combine a processor, industrial communication interface and support for multiple cameras in a compact, robust industrial system. These systems offer optimized heat dissipation and allow the use of fast processors with maximum performance, allowing multiple cameras to operate simultaneously. Compact vision systems often include a built-in graphical user interface that can be operated directly with a touch screen or mouse and keyboard. Images and live results can be displayed on a monitor directly connected to the system.
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3. PC-based vision systems
When application requirements exceed a compact vision system in terms of processing power, number and type of cameras, or when a dedicated FPGA processor is required, vision systems are typically based on an industrial PC either in a 19-inch rack or a compact panel mounted unit. The open bus architecture allows for bespoke systems to be assembled and additional interface cards to be added. As for the user interfaces available along with programming libraries to develop custom applications. A PC-based solution offers the highest degree of flexibility. However, care must be taken to select the appropriate operating system and the components selected. Modern cameras generate high data rates and demanding software solutions require large amounts of computing power. Due to the extremely high payload, it is essential to achieve absolute compatibility to ensure a successful solution. Sourcing all components separately increases risk and can be time consuming.
For standard applications, compact systems or smart cameras are often a better choice, due to reduced complexity, lower cost and proven compatibility
