Many people want to know what parameter tests are required for a qualified and usable optical cable before it is sent out to the manufacturer, and what specific usage conditions can be guaranteed by these tests. This article can solve your doubts. We introduced the types of parameter tests that outdoor optical cables need to undergo after production, and answered the corresponding usage scenarios for each test.
Firstly, we need to know that the performance parameters of outdoor optical cables are divided into mechanical performance parameters and environmental performance parameters. This article only introduces the mechanical performance parameters, and first understand their significance for our construction and use processes.
The mechanical performance parameters include the following: tension (stress-strain, breaking force), flattening, impact (impact at low temperature), bending (repeated, dynamic and static, bending at low temperature), vibration, twisting, dancing, pulley test, out sheath and marking wear, etc.
The significance of mechanical performance parameters of outdoor optical cables
Tension (stress-strain, breaking force): Short term stretching considers the ability to withstand traction during construction, while long-term stretching considers the ability to withstand longitudinal traction during normal operation after fiber optic cable construction. Consider the magnitude of changes in the longitudinal stress borne by a self-supporting overhead optical cable in terms of stress-strain; The breaking force considers the ability of the power cable to withstand the force when it is pulled apart.
Flattening: Short term flattening considers the ability of the optical cable to withstand various lateral pressure factors (such as vehicles and personnel) during construction, while long-term flattening considers the ability of the optical cable to withstand various lateral pressure factors (such as compression and soil compaction) after construction.
Impact (impact at low temperature): Consider the impact capacity of soil or stones on the optical cable during construction.
Bending (repeated, dynamic and static, bending at low temperature): Repeated bending considers the ability of optical fibers to withstand repeated bending during construction. Dynamic and static bending consider the bending resistance of optical cables during or after construction. Low temperature bending considers the bending resistance of optical cables (mainly sheaths) at low temperatures.
Vibration: Consider the anti vibration capability of optical cables in high vibration environments such as bridges and railways.
Twisting: This parameter considers the ability of optical cables to resist torsion during construction, such as cable coiling and joints.
Dancing: Consider the ability of self-supporting optical cables to withstand strong winds during operation.
Pulley test: Consider the ability of optical cables to be constructed through pulleys.
Outer sheath and marking wear: Consider the ability of optical cables to resist sheath wear during construction and the wear resistance of sheath markings after construction (mainly in pipelines and overhead methods). Mainly for the convenience of handling quality accidents.
Finally, if you still want to learn more about the environmental performance parameters and testing of optical cables, I will answer your questions in the next article.