Reading and self-timekeeping clock system for satellite-borne computer real-time clock

A technology of on-board computer and real-time clock, which is applied in calculation, instrumentation, electrical digital data processing, etc., can solve the problems of unguaranteed accuracy and reliability, occupation, etc., save the time of CPU participating in timing and control, and improve Accuracy, the effect of improving the utilization rate

Inactive Publication Date: 2014-11-19
NO 771 INST OF NO 9 RES INST CHINA AEROSPACE SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using software to realize this function requires a certain amount of resources to maintain the operation of the clock itself, and the accuracy and reliability cannot be guaranteed

Method used

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  • Reading and self-timekeeping clock system for satellite-borne computer real-time clock
  • Reading and self-timekeeping clock system for satellite-borne computer real-time clock
  • Reading and self-timekeeping clock system for satellite-borne computer real-time clock

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Embodiment Construction

[0013] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0014] see Figure 1 to Figure 3 , the present invention includes a processor interface module for communicating with each processor in real time, a register module, a time service timing control module, a latch module for latching the current time, and a module for realizing nanosecond values, micro The second value and the timing module of the second value accumulation; the processor interface module is connected with the register module, the timing calibration control module and the clock latch module respectively, and the register module and the timing calibration module are all connected to the timing module; the timing calibration module is also It is connected with the time latch module; the output terminal of the timing module is connected with the input terminal of the clock latch module. The timing module includes nanosecond cumulative counters, microsecond...

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Abstract

The invention discloses a reading and self-timekeeping clock system for a satellite-borne computer real-time clock. The reading and self-timekeeping clock system comprises a processor interface module, a register module, a time service and timing control module, a latching module and a timekeeping module, wherein the processor interface module is used for conducting communication with all processors in real time, the latching module is used for latching a current moment, and the timekeeping module is used for realizing accumulation of nanosecond values, microsecond values and second values. According to the reading and self-timekeeping clock system, a hardware mode is adopted to realize time management, the accuracy, stability and reliability of satellite time management are greatly improved, and therefore the performance of a control system for a satellite is improved. By means of the reading and self-timekeeping clock system, time for a CPU to participate in timekeeping and control is saved, delay of software timekeeping is shortened, CPU resources are effectively released, and the utilization rate of the CPU of the whole system is increased.

Description

technical field [0001] The invention belongs to the technical field of clock systems, and in particular relates to a real-time clock reading and self-keeping clock system for a satellite-borne computer. Background technique [0002] With the rapid development of the computer field, there are stricter requirements for precise time. Especially in the satellite system, it is very necessary to keep the time synchronization and time accuracy of the computer. According to the automatic control theory, accurate on-board time management is of vital importance to the orbit control and attitude control of modern satellites. my country's large satellites and small satellites continue to use the traditional clock management mechanism, which is usually realized by software. The on-board processor maintains the time and refreshes the time by reading commands. Implementing this function with software requires a certain amount of resources to maintain the operation of the clock itself, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/16
Inventor 赵毅赵睿何小青王珍赵阳刘琦
Owner NO 771 INST OF NO 9 RES INST CHINA AEROSPACE SCI & TECH
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