4 results about "Short message system" patented technology

This invention relates to a method for adjusting the power-on / off state of a BeiDou short message system mounted on a satellite, comprising: acquiring a first state of the BeiDou short message system for the current calculation cycle; responding to the first state being that autonomous adjustment of the power-on / off state is not allowed, not adjusting the power-on / off state for the current calculation cycle; responding to the first state being that autonomous adjustment of the power-on / off state is allowed, then performing the following: acquiring the power-on / off state and the duration of the power-on / off state for the current calculation cycle; calculating the latitude and longitude of the satellite's nadir point for the current calculation cycle; and determining whether to adjust the power-on / off state for the current calculation cycle based on the power-on / off state for the current calculation cycle, the duration of the power-on / off state, the latitude and longitude of the satellite's nadir point, the theoretical power-on time of the current orbit of the satellite, the maximum / minimum power-on time threshold, and the minimum time interval threshold between two power-on intervals. This invention can improve the reliability of the BeiDou short message system and extend its service life.

The present application relates to a kind of fault diagnosis processing method and device of beidou short message system, applied in the host computer of the fire point detection system carried on satellite, fire point detection system includes fire point detector and beidou short message system, fire point detector is electrically connected with beidou short message system, beidou short message system is used to communicate with external GEO satellite;Method includes: every other preset period, the first state and the second state of beidou short message system are acquired, first state and second state are respectively determined based on the first instruction and the second instruction that the fire point detector is sent beidou short message system;First instruction includes the beam state of GEO satellite, second instruction is determined based on the preset instruction that the fire point detector is sent beidou short message system;Based on the duration of the first state and the second state obtained, whether beidou short message system is failure and the fault type of corresponding failure are judged;If yes, then the corresponding processing measure is determined based on the fault type of failure.

This invention proposes a rapid burst signal acquisition module based on multi-chip collaborative processing, belonging to the field of signal processing. The module includes a clock synchronization chip, a main computing chip, and N-1 auxiliary computing chips. The clock synchronization chip generates a 1PPS pulse signal and a system reference clock. The main computing chip receives externally input sampled data and distributes it evenly among the N computing chips. Each computing chip performs its own acquisition calculation on the received data to obtain the acquisition result. The auxiliary computing chips return the acquisition result to the main computing chip, which then comprehensively evaluates all acquisition results and outputs the final acquisition result. By constructing a "1 master + N slave" distributed computing architecture and employing a three-level collaborative mechanism of time synchronization, phase slicing, and result fusion, the module effectively solves the problem of weak signal acquisition for consumer terminals in the BeiDou short message system.

The embodiment of the invention is suitable for the technical field of communication and emergency rescue, and provides a maritime emergency rescue method, a rescue terminal and an application system.The method is applied to a converged communication terminal, and the converged communication terminal is matched with a ship automatic identification system (AIS) and a Beidou short message system at the same time. The method comprises the steps that help-seeking information sent by a spontaneous help-seeking device assembled on a life jacket through an AIS communication link is received, the help-seeking information is generated under the condition that the spontaneous help-seeking device monitors that a person falls into water, and the help-seeking information comprises identity information of the person falling into water and falling position information; based on the help seeking information, triggering an alarm device on the ship to give an alarm to a personnel falling-into-water accident; and transmitting the personnel falling-into-water accident to a maritime emergency rescue platform through a Beidou short message communication link. By the adoption of the method, rapid response and rescue can be conducted on the person falling into water when the person falling into water accident happens, and rescue efficiency and success rate are improved.