Design of an extremely fine coaxial fiber bundle anti-interference scheme for robot vision system

In modern robot vision systems, the camera module undertakes the core task of acquiring high-precision image data, while the extremely thin coaxial cable is the key channel for high-speed signal transmission. Due to the small structure of the cable and high transmission bandwidth, it is prone to interference in complex electromagnetic environments, which directly affects the stability of the vision system and the quality of the image. Therefore, how to ensure signal integrity and anti-interference performance through design is a key link for the reliable operation of the vision system.

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Signal integrity and external interference risk

Extremely fine coaxial cable bundles are prone to electromagnetic interference from internal equipment such as robot motors, switch-mode power supplies, and wireless modules due to their small size and short transmission distance. These interferences can cause signal distortion, image frame loss, or bit errors, severely affecting the performance of the vision system. Therefore, ensuring signal integrity is the primary task of the design.

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Comprehensive shielding and grounding design

360° metallic shielding is an effective anti-interference measure. It forms a Faraday cage by the outer shielding to prevent external electromagnetic signals from intruding and to prevent signal leakage within the wires. The shielding material can be foil, metal woven mesh, or a composite structure, taking into account both flexibility and shielding performance. The shielding layer needs to be reliably grounded at the equipment housing and adopt a multi-point grounding design to reduce common-mode interference and stabilize the electromagnetic environment of the system.

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Three, bead filter and reasonable wiring

At the key nodes of the wiring harness, ferrite beads or filters can be installed to absorb high-frequency common-mode noise and provide an additional protective layer for the signal. At the same time, the wiring should be planned reasonably to avoid parallel or crossing with high-power power lines or servo motor lines, and the bending radius should be controlled to prevent mechanical stress from damaging the shielding integrity, ensuring signal stability.

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Four, differential matching and verification testing

If the camera module uses differential signal transmission, it is necessary to ensure that the lengths of the P/N lines match to avoid internal delay causing electrical field asymmetry; good impedance matching can reduce reflection and crosstalk, enhancing transmission quality. The final design should be verified through EMC testing, spectrum analysis, and shielding effectiveness measurement to ensure that the extremely thin coaxial cable bundle can still achieve high-speed, low-error rate, and stable image transmission in complex electromagnetic environments.

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Through multi-dimensional design such as 360° shielding, reliable grounding, bead filtering, reasonable wiring, and differential matching, the extremely thin coaxial cable beam in the robot vision system can achieve high-quality, low-error image transmission in complex electromagnetic environments, providing a reliable guarantee for robot precision operation and intelligent applications.

I amSuzhou Huichengyuan Electronic Technology Co., Ltd.Long-term focus on the design and customization of high-speed cable harnesses and extremely fine coaxial cables, committed to providing stable and reliable high-speed interconnection solutions. For customization or more information, please contactManager Zhang: 18913228573 (WeChat same number)。