Device for realizing optical path self-inspection and bypass protection of ring network switch in wind power industry

The invention discloses a device for realizing optical path self-inspection and bypass protection of a ring network switch in the wind power industry. In order to overcome the problems of cost and space of dual-machine hot standby redundancy in the prior art and communication interruption caused by faults of two or more looped network switches in a looped network at the same time, the device is arranged in an industrial Ethernet switch forming a looped network, the switch comprises a switching unit used for data forwarding processing, and the switching unit is respectively communicated with a front-stage switch and a rear-stage switch through optical paths; an optical power detection module and an optical switch are respectively arranged in an optical path of the switch; the optical power detection module is used for detecting the light emitting power of the switch, and the optical switch is used for carrying out optical path switching on optical signals. The device of the scheme saves cost and space, and can