Abstract: The present invention relates to a fiber transmission field and provides a data sending or receiving method, device, and apparatus used in optical fiber transmission. The method includes: detecting data to be transmitted; encoding one bit pulse width to M parts if the to-be-transmitted data is 0, wherein the first part is a high-level, the later M?1 part is a low-level; encoding one bit pulse width to N parts if the to-be-transmitted data is 1, wherein the first part is a high level, and the later N?1 part is a low-level, the M is not equal to the N but both are integer which is greater than or equal to 2; and sending the encoded level signal.

Abstract: The present invention relates to a data acquiring field and provides a remote-signal data acquiring method and device. In the present invention, the remote-signal data are received according to the user's command or a fixed frequency, the currently received remote-signal data are compared with previously received remote-signal data. If the currently received remote-signal data are different from the previously received remote-signal data, a position-alternation indication signal is generated, and the currently received remote-signal data are acquired according to the position-alternation indication signal, thereby the remote-signal data are acquired only when the remote-signal data generate position-alternation and remains unchanged when the remote-signal data do not generate position-alternation. Therefore, the problems of long processing time and low acquiring effect to the remote-signal data of the known method for acquiring the remote-signal data are solved.

Abstract: The present invention provides a displacement monitoring system for a tower, the displacement monitoring system includes a tower displacement monitoring terminal and an underground displacement monitoring terminal electrically connected to the tower displacement monitoring terminal, the tower displacement monitoring terminal is arranged on the tower and includes a main control module, an overground tower displacement sensor, a power supply module and a communication module, wherein the overground tower displacement sensor, the power supply module and the communication module are electrically connected to the main control module respectively, the underground displacement monitoring terminal is arranged on an underground bedrock and includes a controlling module and an underground displacement sensor electrically connected to the controlling module.