When stranded-wire helical springs are impacted, the movement of every spring coil will become very complicated owing to various factors, such as the mass, inertia and resonance of spring, the internal friction of steel wires, also the relative slipping during different steel wires of strandedwire helical springs. Base on that, a non-contact and multi-channel detection device of dynamic parameters of stranded-wire helical springs is proposed, which involves the design of mechanical structure, the lectotype and installation of sensors, the hardware and software module of signal acquisition and analysis. This device, combining a novel algorithmic of data processing special for springs,...