CN1054842A - 响应专家传感器诊断的控制传感器处理算法装置 - Google Patents
响应专家传感器诊断的控制传感器处理算法装置 Download PDFInfo
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Abstract
一种用于控制传感器数据计算的装置,包括一个
对传感器数据进行扫描的过程控制计算机(10)和一
个与上述过程控制计算机(10)相连,用于传输传感器
数据的通信链路(25);一个专家系统诊断计算机(16)
与通信链路相连,用于根据被传输的传感器数据,通
过对异常传感器的诊断产生一则诊断报文,且该通信
链路;适于将诊断报文提供给过程控制计算机(10),
用于响应该诊断报文执行传感器数据计算。
Description
本发明涉及到一个以专家系统诊断为基楚的用于控制传感器信号处理计算的算法装置,尤其涉及到一种允许由一个位于远方的专家系统对传感器故障进行诊断并将诊断的结果传送到一个根据诊断对传感器计算和控制计算进行控制的传感器采样和设备控制系统。
复杂的运算现时是由位于组合设备诸如发电设备处的设备数据中心完成的,综合计算的一个例子是透平热力学效率计算。这样的一种计算是以在线数据为基础,而一个不正确的传感器数值可以产生不合理的结果,诸如透平效率大于100%或小于0%。由于透平效率是被设备操作人员用来指导试图使设备效率为最大的控制操作的,不恰当的计算结果可以使操作人员不能达到设备最高效率。为了解决这种不恰当的计算问题,在数据中心计算机中提供综合传感器分析算法去解决各种传感器可以经历的许多可能的问题。当一个新的传感器问题发生时,综合传感器分析算法经常失灵,且执行的是以未修正过的传感器数值为基础的综合计算。需要的是一种执行传感器诊断的方法,这种诊断方法使设备数据中心计算机解除传感器诊断的任务并允许设备数据中心计算机集中到线数据采集和过程控制上。
在这种情况下位于远方的诊断中心继续接收不恰当数据,结果,执行高级系统故障诊断或该诊断系统简单地将一个信息传送给设备操作人员,指示出在可以进行某种高级诊断前,必须对该传感器进行调整。当前,没有从专家诊断系统传送到数据采样程序的通信。需要的是一种允许传感器扫描和处理程序去和诊断系统进行通信相连通的方法。
本发明的一个目的是提供一个传感器诊断系统和计算控制系统,它们具有足够的灵活性,使传感器的各种问题不会造成控制系统的破坏。
根据此目的,本发明属于一种用于控制传感器数据计算的装置,包括一个对传感器数据进行扫描的过程控制计算机和一种与上述过程控制计算机相连,用于传输传感器数据的通信链路;其特征在于专家系统诊断计算机与上述通信链路相连,根据被传输的传感器数据通过对异常传感器的诊断产生一个诊断信息,上述通信链路被用来将上述诊断信息供给上述过程控制计算机,用于完成响应于诊断信息的传感器数据计算。
本发明从以下仅作为举例在附图中示出的较佳实施例的叙述中将更容易明了,其中:
图1示出本发明的工作和各个组成部分;
图2示出用于对故障传感器进行诊断的一条规则举例;
图3示出一张诊断结果真值表;
图4描绘出用在本发明中的较佳专家系统采用的数据结构;
图5示出专家系统诊断信息处理;
图6示出由设备数据中心计算机的信息处理;以及
图7和8描绘了另一些根据诊断结果完成传感器处理的方法。
正如图1中示出的一台设备数据中心计算机10,诸如一台数字设备公司微型VAX计算机,从传感器12获得传感器数据并用那些数据控制一台复杂的处理设备14,诸如核电站或燃矿物燃料的电厂。本发明在一些传感器故障时,宁可将传感器数据传输给一台诊断操作中心计算机16,诸如一台数字设备公司的VAX计算机,而不是由数据中心计算机10完成传感器分析和继续处理,该VAX计算机用一个专家系统,诸如PDS(过程诊断系统)可从Westinghouso得到且在美国4644,479和4649,515号专利中介绍过,这里被引入作为参考,对传感器的各种问题进行诊断,当然别的专家系统,只要它们具有诊断传感器失常的能力,可以用于传感器诊断的任务,在操作中,设备计算机10中的一个传统的传感器扫描程序20对传感器12扫描,并将传感器数据装入到一个原始传感器数据文件22中,检验的传感器数据是非线性的,一个普通的通信路由器(router)程序或实用程序,例如在数字设备公司的VAX,VMS计算机系统上可得到的DEC-NET,将传感器数据格式化成一则报文并在常规的通信网上,诸如电话线或微波数据通信系统,将非线性的传感器数据传输到操作中心诊断计算机16中。对应的通信程序26对报文进行分析并将原始传感器数据存储入一个原始传感器数据文件28中。当文件28完成时,报告专家系统30(如虚线所示)且该原始传感器数据被专家系统推理机30访问,该推理机如前面介绍过的PDS系统,它用规则库32中的各种规则去诊断故障的传感器,诊断的结果被存储入保存在PDS内部的结点表数据库34中,这表是可通过一个PDS实用程序存取的。PDS还产生两个输出文件,第一个文件是一张所有失常节点的完整表格,具有0,0以上的置信度,被监视诊断系统的人使用,而第二个文件是具有0.5以上的置信度的全部失常节点表,这个输出文件被送到设备数据中心10中的显示器52,在那里已与一个诊断指标或值相关联的(将在后面作较详细讨论)每个诊断被数据中心计算机10用来控制后来的传感器处理。一旦完成传感器故障的一个完整诊断,在图5中较详细示出的一个报文程序36存取用于传感器处理控制报文的节点表数据库,并将该报文存储入报文文件38中,一旦报文程序结束并已产生动态报文文件,通信程序26被激活,将报文文件38的内容传输到产生一个对应报文文件40的通信程序24。一旦通信程序完成。产生了报文文件40,图6中较详细示出的报文解释程序42开始检查报文,并将传感器处理程序控制数值存储进计算控制数据文件44中的恰当位置处,一旦报文解释程序42已完成执行,传感器处理程序如图7和8中详细示出的例子从文件44获得计算控制数据,并将原始传感器数据处理成处理后的传感器数据,该数据被存储在一个恰当的文件48中或在设备14上进行实际处理控制操作。尽管该图指出:程序42能唤醒程序46,最好程序46根据定时中断基准醒来。当控制数值指出扫描程序的一个参量发生了变化,例如为了企图降低瞬态噪音。扫描周期从10秒变成20秒,该传感器扫描程序20可以获得控制数值,并进行适当的扫描周期调整,也可以对传感器的非线性限值进行调整。当为文件48产生了处理后的传感器数据,然后通信程序24可以将处理后的传感器数据传送到诊断计算机16。该计算机可以用前面讨论过的专家系统去完成高级诊断工作,例如确定是否要对一台设备,诸如一台发电机进行维修。这种高级诊断工作的结果可以传送回数据中心计算机10,在那里另外的处理程序50,诸如显示处理程序,可以对供一个操作人员54检查用的显示器52提供高级诊断的多种结果,当传感器数据22根据诊断处理过后也可以立即用于控制操作,而不首先将它作为一个文件48存储,然后完成控制操作。
诸如在图1中所示的一个系统,将传感器故障诊断的负担转移到一种能更有效完成这种诊断的软件上。这个系统还减轻了数据中心计算机10的传感器诊断的负担。这样一个系统还使具有较小的数据中心计算机的设备取得需要精确的传感器数据,象设备故障计算系统一样的复杂计算系统的效益,而不需用复杂的传感器分析软件对设备数据中心计算机进行翻新改造。
图2示出用于产生与热再热压力传感器有关的计算控制数值的一条典型规则的工作过程,图2中示出的规则把与热再热压力传感器70,冷再热压力传感器72和排汽压力传感器74有关的诊断结果作为输入,对于传感器本身的诊断是在熟悉专家系统知识的普通工程师的技术范围内且完成相对简单的任务,诸如相对于有效数据范围限值对原始传感器数据进行检验。由“或”门76、“非”门78和“与”门80描述的这个规则的逻辑产生一个表明再热压力传感器已经故障的置位度是在0.6和1.0之间,以及再热压力算法应该用程序2(在冷再热压力和第一级低压抽汽压力之间插入)而不用程序1(传送压力传感器的读数)的报文节点82输出。到加热器再热压力算法的计算控制通信在这种情况使用诊断数值为2进行通信。
在这一特殊例子中,传输的数值表明所要用的描入法程序,当然诊断数值可用其他方法控制计算,诸如实际用传感器数据代替或指示必须用预先规定的数据值来代替传感器数据。当然,由于在上面举例中的故障传感器组合中可以引起8种不同的组合,8种不同规则或对应于这些组合的不同逻辑操作必须在规则库32中体现出。这些不同规则的结果可以表示在如图3所示的表格中,图3示出每条规则或报文具有一个对应的控制数值,这个数值是根据规则执行的置信度系数选择的,在这种表示法中,可以用规则的置信度系数输出去访问这样一个表格,并用其中的控制数值去指定一个报文节点84。
在诸如PDS的专家系统中,系统中的每个节点又与一组存储槽(slots)相联系,图4示出在作节点表数据库34中所存储的诊断时,由较佳专家系统将会使用的假定节点90存储槽,异常节点92存储槽和报文节点94存储槽。由于经专家系统推理机传感器诊断的结果,节点表数据库被报文存储槽所填满如图4中方框94所示。
报文表数据库由报文程序36扫描,直到遇到一个报文节点存储槽并取出这一报文节点存储槽的内容,如图5中102所示。如果在104判定置信度系数落在最大和最小置信度系数之间,则在106对报文存储槽的数值字段进行检验,以确定数值字段是否包含一个节点名称。通过允许用实际整数值以及节点名称来填入数值字段,可以为传感器处理程序提供对计算控制值的间接引用。这使许多不同的诊断规则参照同一诊断控制数值时易于改变这些控制值。这还允许别的规则去计算控制数值,诸如传感器求它们的平均值以及将它们放在一简接存取的可变节点中。如果数值是一个节点名称,则在108数值从名称节点取出,然后在110在报文文件38中存储一个包括报文名称、目的地和数值的文件项。如果在112没有遇到另外的报文,程序停止。
当报文文件40已经完成,报文解释程序42,如图6中详细示出的,将传感器处理程序控制数值存储在计算数据控制文件44的恰当位置中。此程序首先在122将报文译码,以分离报文名称,目的地和控制数值。目的地被用在一个牵引文件中,在VMS中称作节文件(Sectionfile),以在124找到信息数值应该存储的实际位置,且然后在126将信息数值存储到那个目的位置,如果在128判定不存在更多的报文,系统停止。
传感器处理程序的工作在图7和图8中详细示出。在传感器处理程序实际计算执行前,计算机10首先在142从目的位置获得相应的控制数值,在144和146对此控制数值检验,希望与先前的对应于不同传感器数据程序148和150的识别后的控制数值匹配。如果出现匹配,执行相应的传感器数据程序。例如,如果传感器计算正常使用三个传感器的平均,当一个传感器坏了时,可以计算两个传感器的平均,控制数值指示两个传感器的平均。对于控制数值的另一个可能性是控制值表示加权平均中的传感器的数量,以至应该从不同传感器计算虚拟的传感器数值。如果不出现匹配,执行铺缺传感器数据程序152。作为如图7所示的以执行子程序调用为主的方式的一种替用方式,本发明可以通过用诸如FORTRAN语言可得到的函数功能来执行适当的程序,正如图8中所示,在这种情况中,函数型执行程序首先在162从目的位置得到相应的控制数值,并在164将此数值存储入函数语句中的相应字段。然后在166执行,函数语句对于传感器处理程序也可以将一个预定的或计算出的值装入到一个公用数据存储区。
本发明的许多特征和优点从详细说明书中已很清楚。从而附后的权利要求书旨在复盖落在本发明的真实精及其范围内的全部特征和优点。进而,由于对那些技术熟练的人员容易作出许多改型和变更,因而不希望将本发明限制在所示出和描述的一成不变的结构和操作中。因此,所有适用的改型和等同物均可归属于本发明的范围内。
Claims (6)
1、一种用于控制传感器数据计算的装置,包括一个对传感器数据进行扫描的过程控制计算机(10)和一条与上述过程控制计算机(10)相连接用于传输传感器数据的通信链路(25);其特征在于:与上述通信链路相连的专家系统诊断计算机(16),用于根据被传输的传感器数据,通过对异常传感器的诊断,产生诊断报文,上述通信链路用来将上述诊断报文供给上述过程控制计算机(10),用于响应诊断报文完成传感器数据计算。
2、根据权利要求1的一种装置,其特征在于:上述诊断计算机包括用于传输控制由所述控制装置所进行的传感器数据计算的控制参量的装置。
3、根据权利要求1的一种装置,其特征在于:上述诊断计算机包括一个专家系统(30,32和34)。
4、根据权利要求1的一种装置,其特征在于:上述诊断计算机(16)位于相对于上述过程控制计算机(10)的远方。
5、根据权利要求1的一种装置,其特征在于:在诊断中包含有一个置信度系数,确定由上述过程控制计算机(10)所执行的传感器数据计算。
6、根据权利要求1的一种装置,其中上述诊断计算机(16)是适于使用包括一个程序目的名称和标明由目的程序完成的传感器数据计算的型式的一个控制数据的报文,将诊断结果传输到上述过程控制计算机(10)。
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US07/491,926 US5122976A (en) | 1990-03-12 | 1990-03-12 | Method and apparatus for remotely controlling sensor processing algorithms to expert sensor diagnoses |
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---|---|---|---|
CN91101471A Expired - Fee Related CN1026832C (zh) | 1990-03-12 | 1991-03-11 | 响应专家传感器诊断的控制传感器处理算法装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US5122976A (zh) |
JP (1) | JPH0765911B2 (zh) |
KR (1) | KR910017308A (zh) |
CN (1) | CN1026832C (zh) |
CA (1) | CA2037948A1 (zh) |
ES (1) | ES2029420A6 (zh) |
IT (1) | IT1252311B (zh) |
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CN105607469A (zh) * | 2014-11-14 | 2016-05-25 | 因文西斯系统公司 | 统一通信模块ucm |
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-
1990
- 1990-03-12 US US07/491,926 patent/US5122976A/en not_active Expired - Fee Related
-
1991
- 1991-02-19 IT ITMI910416A patent/IT1252311B/it active IP Right Grant
- 1991-03-11 KR KR1019910003850A patent/KR910017308A/ko not_active Application Discontinuation
- 1991-03-11 ES ES9100623A patent/ES2029420A6/es not_active Expired - Lifetime
- 1991-03-11 CA CA002037948A patent/CA2037948A1/en not_active Abandoned
- 1991-03-11 CN CN91101471A patent/CN1026832C/zh not_active Expired - Fee Related
- 1991-03-12 JP JP3046552A patent/JPH0765911B2/ja not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105607469A (zh) * | 2014-11-14 | 2016-05-25 | 因文西斯系统公司 | 统一通信模块ucm |
Also Published As
Publication number | Publication date |
---|---|
ITMI910416A0 (it) | 1991-02-19 |
KR910017308A (ko) | 1991-11-05 |
CN1026832C (zh) | 1994-11-30 |
JPH0765911B2 (ja) | 1995-07-19 |
IT1252311B (it) | 1995-06-08 |
CA2037948A1 (en) | 1991-09-13 |
ITMI910416A1 (it) | 1992-08-19 |
US5122976A (en) | 1992-06-16 |
ES2029420A6 (es) | 1992-08-01 |
JPH04220521A (ja) | 1992-08-11 |
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