Abstract: An electric cylinder driving device includes an electric cylinder outer tube, an electric cylinder inner tube, a ball screw, an electric cylinder piston, a ball screw nut and an elastic oil scraping device. The electric cylinder outer tube is sleeved on the electric cylinder inner tube. The ball screw nut is installed in an upper end of the electric cylinder inner tube. An end of the ball screw is movably connected in the electric cylinder outer tube, and another end of the ball screw matched with the ball screw nut is inserted into the electric cylinder inner tube. The electric cylinder piston is disposed between the electric cylinder outer tube and the electric cylinder inner tube. A lower end of the electric cylinder inner tube is provided with an oil pool. The elastic oil scraping device is disposed between the electric cylinder piston and the electric cylinder outer tube.

Abstract: A time synchronization apparatus and method for automatically detecting the asymmetry of an optical fiber.

Abstract: A method and a device for detecting a 1588 time error between network elements are disclosed. The method includes: a 1588 time network is established for an entire network; when it is required to detect a 1588 time error between a network element and its opposite network element, the network elements transmit, probe packets, each including a local timestamp to each other; and the network element receiving a probe packet calculates, according to a preset time difference algorithm, a time difference between the local timestamp and the timestamp in the probe packet, determines, according to the time difference, whether there is a failure in a detection path, and reports an alarm when there is a failure in the detection path. The disclosure prevents erroneous time transmission due to the time error, thus ensuring the network stability.

Abstract: A time synchronization apparatus and method for automatically detecting the asymmetry of an optical fiber.

Abstract: A method and a device for detecting a 1588 time error between network elements are disclosed. The method includes: a 1588 time network is established for an entire network; when it is required to detect a 1588 time error between a network element and its opposite network element, the network elements transmit, probe packets, each including a local timestamp to each other; and the network element receiving a probe packet calculates, according to a preset time difference algorithm, a time difference between the local timestamp and the timestamp in the probe packet, determines, according to the time difference, whether there is a failure in a detection path, and reports an alarm when there is a failure in the detection path. The disclosure prevents erroneous time transmission due to the time error, thus ensuring the network stability.