发明名称 |
Förfarande och anordning för att skapa ett processberoende jämförelsekriterium för användning i samband med kontroll av en övervakad storhets värde |
摘要 |
The method is for obtaining a process-dependent comparison criterion for use in conjunction with control as to whether a monitored entity value exceeds the process-determined permitted value, and where the entity is represented by sampled measurement values (I(k)). The entity which the sampled measurement values represent is high pass-filtered so that a high pass-filtered representation (Ihp(k)) of the entity is obtained, which is fed to a first selector whose output (Istab(k)) consists of the largest of Ihk(k) and (I-C1)-Istab(k-1). - After this, C2-Istab(k) is fed together with Ihp(k) to a second selector and if Ihp(k) is greater than C2-Istab(k) this is interpreted as if the monitored entity exceeds the process-determined permitted values and where Istab(k-1) comprises a sample value a sample before Istab(k) and where C1 and C2 consist of previously selected constants. |
申请公布号 |
SE9304096(L) |
申请公布日期 |
1995.06.08 |
申请号 |
SE19930004096 |
申请日期 |
1993.12.07 |
申请人 |
ASEA BROWN BOVERI |
发明人 |
MARCHETTI CLAUDIA;WAHLBERG CONNY;WIKSTROEM KENT |
分类号 |
H02H3/05;(IPC1-7):H02H3/05 |
主分类号 |
H02H3/05 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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