Interference alarm recognition method based on alarm duration feature
A technology of duration and identification method, applied to alarms, instruments, etc., can solve problems such as production safety risks, lack of interference alarm identification methods, and impact on production process operation safety and economic monitoring, etc., to achieve effective identification effects
Active Publication Date: 2018-12-25
SHANDONG UNIV OF SCI & TECH
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[0004] Although the interference alarm is very harmful, the current methods for identification of interference alarms are mainly determined by qualitative description, for example, the occurrence of more than 9 alarms within 5 minutes is used as a criterion to judge interference alarms, and there is a lack of comprehensive and systematic identification methods for interference alarms
This technical status hinders the development of work such as interference alarm elimination and alarm system performance optimization, which affects the operation safety and economic monitoring of the production process, resulting in production safety risks
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Embodiment 1
[0040] Such as figure 1 As shown, a kind of interference alarm identification method based on the alarm duration feature of the present invention comprises the following steps:
[0041] Step S1, obtain monitoring process signal x(n), n=1, 2,..., 1 month historical data and its alarm threshold x tp , generate an alarm signal x by comparing historical data with its alarm threshold a (n), n=1,2,...;
[0042] Step S2, define the alarm duration set k=0,1,2,…, where Set for alarm duration number of alarms in
[0043] When k=0, the alarm duration set is the alarm signal x a (n), the statistical results of all alarm durations in n=1,2,..., where express The number of elements in is the set of alarm duration The CCP happened times alarm;
[0044] Step S3, define RC A The number of elements in the required alarm duration set when this algorithm is calculated, gets RC in the present invention A =500;
[0045] like dissatisfied Then it is determined that the mon...
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The invention belongs to the field of process industry production process monitoring, in particular to an interference alarm recognition method based on an alarm duration feature. The method comprisesthe following steps that: step S1, an acquired monitoring process signal is compared with an alarm threshold value thereof to generate an alarm signal; step S2, an alarm duration set is defined; stepS3, if C<k> is not satisfied C<k> > RC, there is no interference alarm, and an algorithm is ended; if C<k> > RC, a sample probability distribution and an estimated geometric distribution of the alarm duration set are calculated; and step S4, degree of fitting R<2> between the sample probability distribution and the estimated geometric distribution is calculated; if the degree of fitting R<2> >= 0.95, alarms corresponding to elements in the alarm duration set are all interference alarms, and the entire algorithm is ended; if the degree of fitting R<2> < 0.95, a new alarm duration set is formed after a largest element in the alarm duration set is removed; and the method is skipped to step S3 to continue the calculation. The interference alarm recognition method based on the alarm duration feature provided by the invention provides an effective technical means for eliminating the interference alarm and realizing performance optimization of an alarm system.
Description
technical field [0001] The invention belongs to the field of process industrial production process monitoring, and in particular relates to an interference alarm identification method based on alarm duration characteristics. Background technique [0002] In the modern industrial production process, the alarm system is widely used in the production process monitoring to ensure the safety and economical operation of the production process. The alarm system monitors the production process by comparing the current value of the monitored process variable with the alarm threshold. The alarm threshold refers to the boundary value of the normal change of the process variable determined according to the process requirements of the production process. When the process variable value exceeds the alarm threshold range, the alarm system sends out an alarm message to notify the operator that there is an abnormality or failure in the production process. The operator analyzes the alarm sign...
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IPC IPC(8): G08B29/12
CPCG08B29/12
Inventor 杨子江王建东周东华
Owner SHANDONG UNIV OF SCI & TECH
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