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Multi-board signal acquisition and synchronous output method

A signal acquisition and signal technology, applied in the field of signal processing, can solve problems such as ignition failure

Pending Publication Date: 2021-04-30
AEROSPACE LIFE SUPPORT IND LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the periodic self-test time is greater than the maximum allowable ignition timing difference, no matter what signal acquisition method is used in signal monitoring, the ignition will fail

Method used

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  • Multi-board signal acquisition and synchronous output method
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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] Such as figure 1 As shown, a multi-board signal acquisition and synchronous output method, taking the water sensor analog acquisition as an example, includes the following steps:

[0021] (1) Initialize the relevant parameters, set [min, max] = [0, 100], trigger the cumulative limit time trigger_limit_time = 200, value = 80, the initial value of count, time_count and fire_flag is zero, and the timer sets 1ms periodic interrupt;

[0022] (2) After the initialization is completed, enter the power-on self-inspection, and perform power-on self-inspection on the commonly used self-inspection items;

[0023] (3) Enter pe...

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Abstract

The invention discloses a multi-board signal acquisition and synchronous output method, which comprises the following steps of: 1) setting a period timer, acquiring a multi-board signal once when the period of the timer is up, and setting the period of the timer as required for controlling the maximum time sequence difference between boards; the method comprises the following steps of: setting a trigger accumulative limit time, that is trigger_limit_time, and a time_count, time counted from the time when a signal is acquired; 2) when an ignition signal is acquired, adding 1 to the count of a count variable count, and when no signal is acquired, subtracting 1 from the count of the count variable count; 3) selecting an ignition triggering value value between [min, max], and when count is greater than or equal to value, setting an ignition signal fire_flag to be 1, triggering ignition, entering an ignition process, and otherwise, returning to period counting; 4) after the ignition is finished, recording data after the ignition; the ignition signal fire_flag being set to be 0; and 5) when the timer triggers periodic interruption, entering a timer interruption service function to process and suppress periodic interference signals. According to the method, the synchronism of multi-board signal acquisition and output is effectively improved.

Description

technical field [0001] The invention relates to signal processing technology, in particular to a multi-board signal acquisition and synchronous output method. Background technique [0002] In order to improve the reliability and safety of protection and lifesaving projects, multi-board redundancy design method is generally adopted. For example, using 3 monitoring boards, when at least 2 of the 3 monitors detect the trigger signal, the ignition signal will be output. If the output ignition time interval between the boards is too large, it will cause ignition failure. Therefore, it is necessary to shorten the difference of the monitoring board from sensing the signal to outputting the ignition timing as much as possible. The embedded software architecture generally adopts software cycle self-test and signal monitoring and polling methods, and the timing between boards is affected by the cycle self-test time. When the periodic self-test time is greater than the maximum allow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K21/00
CPCH03K21/00
Inventor 钟廷伟沈天驹尉飞艳
Owner AEROSPACE LIFE SUPPORT IND LTD