Hidden method to improve the stability of visual inspection system - 10G high-speed image capture card
At present, with the improvement of supporting infrastructure construction in all aspects of our country and the accumulation of enterprise technology and funds, all walks of life are actively exploring and boldly trying machine vision technology to realize industrial automation and intelligence. During the use of machine vision systems, the continued stability of the machine vision equipment and the accuracy of the transmitted data are particularly important.
The structure of the visual inspection system:
In the visual inspection solution, "industrial camera <—> connecting cable <—> image capture card <—> industrial computer", such basic connections constitute the main project of the machine vision system. Based on this basic structure, let's discuss how to ensure the accuracy of image collection and data transmission in the visual inspection transmission scheme of GigE interface equipment with 10G transmission rate.
Industrial cameras for visual inspection solutions:
In terms of industrial cameras, the application needs of lithium battery, photovoltaic, rail transit and other industries have prompted GigE cameras to develop in the direction of high resolution, high reduction, and high speed. The transmission rate is moving towards 2.5G, 5G, and 10G. The industrial camera itself , transmission cables, image acquisition cards and industrial computers have all put forward new requirements.
In visual inspection applications, GigE Vision standard industrial cameras use UDP transmission protocol for data transmission. GVCP (GigE Vision Control Protocol) and GVSP (GigE Vision Streaming Protocol) are also used. The addition of the two guarantees This ensures the integrity and reliability of UDP data transmission. This means that when GigE Vision was first established, it designed and adopted a solution to ensure data transmission at the application layer, which can better optimize the resources of industrial computers to ensure that industrial cameras and machine vision-related software programs run more stably. In addition to UDP protocol, there are also industrial cameras that use TCP protocol to transmit data.
Connecting cables for visual inspection solutions:
Industrial cables are essential components for connecting industrial cameras. In 10G high-speed transmission, the cable standards of 10G Ethernet are generally followed, that is, cables with specifications no lower than Cat6. In harsh application scenarios, it is more recommended to use Cat6A or even Cat7 specification cables, such as Lianrui's high-flexibility 10G industrial camera network cable, which has high impedance, anti-stretch, high-speed stability, wear-resistant and flame-retardant, screw fixation, etc. The characteristics make the transmitted data signal less susceptible to external interference during the visual inspection process, and can ensure that the image data is transmitted completely.
Image capture card for visual inspection solution:
As a key component of the industrial computer connected to the industrial camera, the image grabber card operates stably without losing frames as a key element. Jumbo frames have a great impact on the operation of GigE Vision devices. Jumbo frames refer to Ethernet frames whose payload exceeds the 1500-byte limit limited by the IEEE802.3 standard. Its increased payload helps improve link utilization and helps devices obtain better network performance.
Generally speaking, the jumbo frame length of conventional image capture cards is about 9014 bytes. Lianrui has gone a step further. The jumbo frame series products have reached a super jumbo frame of 16348 bytes, which reduces bandwidth usage and network overhead, and reduces CPU occupancy and data transmission efficiency increased by more than 30%, providing higher Ethernet performance for the stable operation of 10G equipment. In addition, the Jumbo Frame series products can carry larger payloads and have ultimate advantages in large-capacity image data processing, helping users solve the problem of frame loss in one fell swoop. Image data can be transmitted stably and completely even on high-speed networks.
I believe that after reading the above introduction, everyone has a preliminary understanding of the visual inspection system. You should know that the role of the 10G high-speed image acquisition card behind the visual inspection solution is to achieve stable data transmission. However, in actual applications, the appropriate image acquisition card must be selected. It does not mean to sit back and relax. In order to achieve high-speed, stable and reliable data transmission, we also need to optimize the settings of the image acquisition card to achieve the best performance and ensure the integrity of image acquisition and data transmission.
In the next issue, we will optimize the setting operation of Lianrui 10G high-speed image capture card and demonstrate the specific operation steps for everyone. Please remember to pay attention.