JP4997997B2 - Anomaly judgment repair measuring equipment - Google Patents

Anomaly judgment repair measuring equipment Download PDF

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JP4997997B2
JP4997997B2 JP2007025042A JP2007025042A JP4997997B2 JP 4997997 B2 JP4997997 B2 JP 4997997B2 JP 2007025042 A JP2007025042 A JP 2007025042A JP 2007025042 A JP2007025042 A JP 2007025042A JP 4997997 B2 JP4997997 B2 JP 4997997B2
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守広 藤崎
覚 落合
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Yokogawa Electric Corp
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本発明は、測定物理量に基づく電気信号に対し、複数ステップの演算を行う測定機器に関し、演算結果の異常を判定し、その異常の修復を実現する測定機器に関するものである。   The present invention relates to a measuring device that performs a multi-step calculation on an electrical signal based on a measured physical quantity, and relates to a measuring device that determines an abnormality in a calculation result and realizes the repair of the abnormality.

特許文献１において、１つのハードウエアで、特定のソフトウエアによる演算処理を行うことで、演算の異常を判定する差圧伝送器を実現している。図５は、従来のこのような差圧伝送器の機能ブロック図である。図５において差圧伝送器は４８は、ホスト装置などの上位機器２９、直流電源２６、伝送線路２８などに接続されている。   In Patent Document 1, a differential pressure transmitter for determining an abnormality in computation is realized by performing computation processing using specific software with a single piece of hardware. FIG. 5 is a functional block diagram of such a conventional differential pressure transmitter. In FIG. 5, a differential pressure transmitter 48 is connected to a host device 29 such as a host device, a DC power source 26, a transmission line 28, and the like.

差圧伝送器４８は、圧力センサ１、計数手段２、順方向演算手段３、逆方向演算手段８、照合手段４６、出力手段２０などから構成される。圧力センサ１は、圧力を検出し電気信号に変換する。計数手段２は、その電気信号の周波数を測定し、順方向演算手段３は、その周波数値に基づき、差圧値を演算し、その差圧値に対応したＰＷＭ（パルス幅変調）信号を出力する。出力値切換え手段１６が、そのＰＷＭ信号を選択出力したとき、出力手段２０が負荷抵抗２７に、演算された差圧値に対応した電流（例えば４から２０ミリアンペアの範囲）を流すように制御する。   The differential pressure transmitter 48 includes a pressure sensor 1, a counting unit 2, a forward direction calculating unit 3, a reverse direction calculating unit 8, a collating unit 46, an output unit 20, and the like. The pressure sensor 1 detects pressure and converts it into an electrical signal. The counting unit 2 measures the frequency of the electric signal, and the forward direction calculating unit 3 calculates a differential pressure value based on the frequency value and outputs a PWM (pulse width modulation) signal corresponding to the differential pressure value. To do. When the output value switching means 16 selects and outputs the PWM signal, the output means 20 controls the load resistor 27 to pass a current corresponding to the calculated differential pressure value (for example, a range of 4 to 20 milliamperes). .

ＰＷＭ演算７の演算値は逆方向演算手段８に入力され、逆方向演算手段８は、順方向演算手段３の演算の方向とは逆の方向に進行する演算を行う。照合手段４６は、それぞれ対応する順方向演算手段３と逆方向演算手段８の演算値が一致するかを判定する。   The calculation value of the PWM calculation 7 is input to the reverse direction calculation means 8, and the reverse direction calculation means 8 performs a calculation that proceeds in the direction opposite to the calculation direction of the forward direction calculation means 3. The collating means 46 determines whether the calculated values of the corresponding forward direction calculating means 3 and backward direction calculating means 8 match each other.

照合手段４６において不一致と判定されたとき、出力値切換え手段１６は、照合手段４６の出力に基づき異常警報手段１５の出力を選択出力し、出力手段２０は、負荷抵抗２７に正常なときの電流範囲外の電流（例えば３．２ｍＡまたは２１．６ｍＡ、以下「バーンアウト電流」という）を流すように制御する。そして、差圧伝送器のユーザーは、上位機器２９でバーンアウト電流値を見ることによって、差圧伝送器４８の演算値不一致による異常を認識できる。   When the collating means 46 determines that there is a mismatch, the output value switching means 16 selectively outputs the output of the abnormality alarm means 15 based on the output of the collating means 46, and the output means 20 is the current when the load resistance 27 is normal. Control is performed so that a current outside the range (for example, 3.2 mA or 21.6 mA, hereinafter referred to as “burnout current”) flows. Then, the user of the differential pressure transmitter can recognize an abnormality caused by a mismatch in the calculation value of the differential pressure transmitter 48 by viewing the burnout current value on the host device 29.

特開２００５−３０９９１３号公報JP 2005-309913 A

図５の差圧伝送器４８に対し、伝送線路２８や空中を伝播するノイズを受けることによって、差圧伝送器内部のメモリに記憶されたデータ（例えば、特許文献１の定数Ａ）が変更されることがある。そのとき、照合手段４６は不一致と判定し、バーンアウト電流が負荷抵抗２７に流れ続ける。そのため、上位機器２９は、プラント設備においてプロセス制御（例えば、圧力制御）を行えなくなる。   The data stored in the memory inside the differential pressure transmitter (for example, constant A in Patent Document 1) is changed by receiving noise that propagates through the transmission line 28 and the air with respect to the differential pressure transmitter 48 in FIG. Sometimes. At that time, the collating means 46 determines that there is a mismatch, and the burnout current continues to flow through the load resistor 27. Therefore, the host device 29 cannot perform process control (for example, pressure control) in the plant facility.

また、差圧伝送器のユーザーまたは製造業者は、順方向演算手段３のうち、どのステップの演算の演算値に異常が発生したのか分からないので、その異常箇所の特定の調査が困難となり多くの工数を費やすことになる。   In addition, since the user or manufacturer of the differential pressure transmitter does not know which step of the calculation value in the forward calculation means 3 has an abnormality, it is difficult to identify the abnormal part, and many Man-hours will be spent.

本発明の目的は、測定物理量に基づく電気信号に対し、複数ステップの演算を行う測定機器に関し、演算結果の異常を判定し、その異常の修復を行い、正常な動作に復帰させることによって、信頼性を高めた測定機器を提供することである。また、測定機器内部のメモリなどの故障によって、異常を修復できないときに演算を停止させるほか、異常箇所を特定しユーザーなどに知らせることによって、ユーザーなどは調査工数を低減し、発生した異常の履歴を上位機器において管理可能とする測定機器を提供することである。   The object of the present invention relates to a measuring device that performs a multi-step operation on an electrical signal based on a measured physical quantity, and determines the abnormality of the operation result, repairs the abnormality, and restores the normal operation. It is to provide a measuring instrument with improved performance. In addition to stopping the calculation when the abnormality cannot be repaired due to a failure in the memory of the measuring instrument, etc., the user can reduce the number of investigations by identifying the abnormal part and notifying the user, etc. Is to provide a measuring device that can be managed by a host device.

このような目的を達成するために、請求項１の発明は、
測定物理量に基づく電気信号に対し複数ステップの演算を行う測定機器において、
前記複数ステップのうち各ステップの演算結果の異常を判定する判定手段と、
前記判定手段の結果に基づき前記演算結果の異常を修復する修復手段を備え、
前記判定手段は、
前記複数ステップを通常の演算方向とは逆の方向に進行させる逆方向演算手段と、
前記複数ステップのうち各ステップの演算値と前記逆方向演算の各ステップの演算値との一致判定を行う演算値一致判定手段と、
前記演算値一致判定手段によって不一致と判定されたステップの演算を構成する各演算に入力する値を生成する模擬入力生成手段と、
前記各ステップの演算を構成する各演算で通常の演算を行うときの値と前記模擬入力生成手段の出力値とを選択制御信号により選択し前記各ステップの演算を構成する各演算に出力する少なくとも１つの選択手段と、
前記模擬入力生成手段の出力に基づき前記選択制御信号を出力する選択制御手段と、
前記各ステップの演算を構成する各演算と同じ演算を前記模擬入力生成手段の出力値に行う模擬入力演算手段と、
前記模擬入力生成手段の出力値に対して演算された、前記演算値一致判定手段によって不一致と判定されたステップの演算を構成する各演算の演算値と前記模擬入力演算手段の演算値との一致判定を行う模擬演算値一致判定手段を備えた、
ことを特徴とする。
In order to achieve such an object, the invention of claim 1
In measuring equipment that performs multi-step operations on electrical signals based on measured physical quantities,
Determination means for determining an abnormality in the calculation result of each step among the plurality of steps;
A repair unit that repairs the abnormality of the calculation result based on the result of the determination unit ,
The determination means includes
Reverse direction calculation means for causing the plurality of steps to travel in a direction opposite to the normal calculation direction;
A calculation value match determination means for performing a match determination between the calculated value of each step of the plurality of steps and the calculated value of each step of the backward calculation;
Simulated input generation means for generating a value to be input to each calculation constituting the calculation of the step determined to be inconsistent by the calculation value match determination means;
A value for performing a normal calculation in each calculation constituting the calculation of each step and an output value of the simulated input generating means are selected by a selection control signal and output to each calculation constituting the calculation of each step One selection means;
Selection control means for outputting the selection control signal based on the output of the simulated input generation means;
Simulated input calculation means for performing the same calculation as each calculation constituting the calculation of each step on the output value of the simulated input generation means;
The calculated value of each calculation constituting the calculation of the step determined to be inconsistent by the calculated value coincidence determining means calculated with respect to the output value of the simulated input generating means and the calculated value of the simulated input calculating means Provided with a simulated operation value match determination means for performing the determination,
It is characterized by that.

請求項２の発明は、請求項１に記載の発明において、
前記複数ステップのうち各ステップの演算結果の異常が、前記修復手段による少なくとも１回以上の修復によって修復しないとき、そのステップの演算を停止させる停止手段を備えた、
ことを特徴とする。
請求項３の発明は、請求項２に記載の発明において、
前記停止手段は、前記修復しないステップの演算に用いられる定数をゼロに変更し固定する、ことを特徴とする。
The invention of claim 2 is the invention of claim 1 ,
When the abnormality of the calculation result of each step of the plurality of steps is not repaired by at least one or more repairs by the repairing means, the stop means for stopping the calculation of the step is provided.
It is characterized by that.
The invention of claim 3 is the invention of claim 2,
The stopping means is characterized in that a constant used for the calculation of the step not to be repaired is changed to zero and fixed.

請求項４の発明は、請求項１から３のいずれかに記載の発明において、
前記修復手段は、前記複数ステップのうち演算結果に異常を発生したステップの演算に関連する値に所定の値を設定する、
ことを特徴とする。
The invention of claim 4 is the invention according to any one of claims 1 to 3 ,
The repairing means sets a predetermined value to a value related to the calculation of the step in which an abnormality has occurred in the calculation result among the plurality of steps.
It is characterized by that.

請求項５の発明は、請求項１から４のいずれかに記載の発明において、
前記複数ステップのうち各ステップの演算結果の異常が、前記修復手段によって修復しないとき、その異常情報を伝送する、
ことを特徴とする。
The invention of claim 5 is the invention according to any one of claims 1 to 4 ,
When the abnormality of the calculation result of each step among the plurality of steps is not repaired by the repairing means, the abnormality information is transmitted.
It is characterized by that.

請求項６の発明は、請求項１から５のいずれかに記載の発明において、
前記測定機器は、フィールド機器である、
ことを特徴とする。
The invention of claim 6 is the invention according to any one of claims 1 to 5 ,
The measuring device is a field device,
It is characterized by that.

本発明によれば、測定物理量に基づく電気信号に対し、複数ステップの演算を行う測定機器に関し、演算結果の異常を判定し、その異常の修復を行い、正常な動作に復帰させることによって、信頼性を高めた測定機器を実現できる。 The present invention relates to a measuring device that performs a multi-step calculation on an electrical signal based on a measured physical quantity, and determines the abnormality of the calculation result, repairs the abnormality, and restores the normal operation, thereby enabling reliable operation. A measuring instrument with improved performance can be realized.

［第１の実施例］
第１の実施例を図１を用いて説明する。図１は、本発明を適用した測定機器の１つである差圧伝送器のブロック図であり、図５と同一のものは同一符号を付し説明を省略する。本実施例は、順方向演算とそれと逆の方向に進行する逆方向演算を行い、両方の演算値の一致判定と異常の修復を行うものである。 [First embodiment]
A first embodiment will be described with reference to FIG. FIG. 1 is a block diagram of a differential pressure transmitter which is one of measuring instruments to which the present invention is applied. The same components as those in FIG. In the present embodiment, a forward calculation and a backward calculation that proceeds in the opposite direction are performed, and the coincidence determination of both the calculation values and the repair of the abnormality are performed.

差圧伝送器２５は、圧力センサ１、計数手段２、順方向演算手段３、逆方向演算手段８、演算値一致判定手段１３、出力手段２０、修復手段１７などから構成され、伝送線路２８を介し、負荷抵抗２７、上位機器２９、直流電源２６に接続されている。   The differential pressure transmitter 25 includes a pressure sensor 1, a counting unit 2, a forward direction calculating unit 3, a reverse direction calculating unit 8, a calculated value coincidence determining unit 13, an output unit 20, a restoration unit 17, and the like. Through the load resistor 27, the host device 29, and the DC power supply 26.

圧力センサ１は、測定物理量である圧力を検出し、圧力値に対応した周波数を有する電気信号に変換して、その周波数は計数手段２によって測定される。 The pressure sensor 1 detects a pressure that is a physical quantity to be measured, converts the pressure into an electrical signal having a frequency corresponding to the pressure value, and the frequency is measured by the counting means 2.

計数手段２の出力は、順方向演算手段３によって演算される。順方向演算手段３は、差圧演算４、差圧補正演算５、スケーリング演算６、ＰＷＭ演算７の複数ステップの演算の順によって構成されている。   The output of the counting means 2 is calculated by the forward direction calculating means 3. The forward direction calculation means 3 is constituted by a plurality of steps of a calculation of a differential pressure calculation 4, a differential pressure correction calculation 5, a scaling calculation 6, and a PWM calculation 7.

差圧演算４は、計数手段２によって測定された周波数ｆｃ、ｆｒと圧力センサ１の特性を示す定数Ａ、Ｂ、Ｃを用いて、下記式（１）により差圧値Ｘを演算する（・は乗算を表す）。   The differential pressure calculation 4 calculates the differential pressure value X by the following equation (1) using the frequencies fc, fr measured by the counting means 2 and constants A, B, C indicating the characteristics of the pressure sensor 1 ( Represents multiplication).

Figure 0004997997
Figure 0004997997

差圧補正演算５は、式（１）で演算されたＸとＥＥＰＲＯＭ ２２に記憶された温度および静圧に依存する動的な補正係数ｋｉを用いて、下記式（２）により温度および静圧により補正された差圧値ｄｐｃｏｍｐを演算する。   The differential pressure correction calculation 5 is performed by using the dynamic correction coefficient ki depending on the temperature and static pressure stored in the EEPROM 22 and X calculated by the formula (1), and the temperature and static pressure by the following formula (2). The differential pressure value dpcomp corrected by the above is calculated.

Figure 0004997997
Figure 0004997997

スケーリング演算６は、式（２）で演算されたｄｐｃｏｍｐに対し、ユーザー指定レンジであるｕｒｖ（１００％）とｌｒｖ（０％）でスケーリングした差圧値ｄｐｓｃａｌｅｄを、下記式（３）により演算する。   The scaling calculation 6 calculates a differential pressure value dpscaled scaled by user-specified ranges urv (100%) and lrv (0%) with respect to dpcomp calculated by the expression (2) by the following expression (3). .

Figure 0004997997
Figure 0004997997

ＰＷＭ演算７は、式（３）で演算されたｄｐｓｃａｌｅｄとＥＥＰＲＯＭ ２２に記憶された温度依存性のある動的な補正係数Ｃｉを用いて、下記式（４）によりＰＷＭ信号を演算する。   The PWM calculation 7 calculates the PWM signal by the following equation (4) using the dpscaled calculated by the equation (3) and the temperature-dependent dynamic correction coefficient Ci stored in the EEPROM 22.

Figure 0004997997
Figure 0004997997

式（４）で演算されたＰＷＭ信号は出力値切換え手段１６に入力される。順方向演算手段３の各ステップの演算が正常なとき、出力値切換え手段１６はＰＷＭ信号を選択し、出力手段２０に出力する。   The PWM signal calculated by the equation (4) is input to the output value switching means 16. When the calculation of each step of the forward calculation means 3 is normal, the output value switching means 16 selects the PWM signal and outputs it to the output means 20.

出力手段２０は、ＰＷＭ信号に基づき直流電源２６から負荷抵抗２７に、補正された差圧値ｄｐｃｏｍｐに対応した電流（例えば４から２０ミリアンペアの範囲）を流すように制御する。ホスト装置などの上位機器２９は、負荷抵抗２７に流れる電流値を読み取り、補正された差圧値ｄｐｃｏｍｐに換算する。また、差圧伝送器２５は、マイクロプロセッサ１９、通信手段２１、出力手段２０によって、伝送線路２８を介し上位機器２９と通信を行い、補正された差圧値ｄｐｃｏｍｐなどを送信し、上位機器２９から設定データなどを受信する。なお、通信プロトコルにはハート通信などがある。 The output means 20 controls the current corresponding to the corrected differential pressure value dpcomp (for example, a range of 4 to 20 milliamperes) to flow from the DC power supply 26 to the load resistor 27 based on the PWM signal. The host device 29 such as the host device reads the current value flowing through the load resistor 27 and converts it into a corrected differential pressure value dpcomp. Further, the differential pressure transmitter 25 communicates with the host device 29 via the transmission line 28 by the microprocessor 19, the communication unit 21, and the output unit 20, and transmits the corrected differential pressure value dpcomp and the like. Receive setting data from. Communication protocols include heart communication.

ＰＷＭ演算７の演算値ｐｗｍは、逆方向演算手段８に入力され、逆方向演算手段８は、順方向演算手段３の各ステップの演算と逆の方向に進行する演算を行う。逆方向演算手段８は、逆ＰＷＭ演算１２、逆スケーリング演算１１、逆差圧補正演算１０、逆差圧演算９の複数ステップの演算によって構成されている。   The calculation value pwm of the PWM calculation 7 is input to the reverse direction calculation means 8, and the reverse direction calculation means 8 performs a calculation that proceeds in the direction opposite to the calculation of each step of the forward direction calculation means 3. The reverse direction calculation means 8 includes a plurality of steps of a reverse PWM calculation 12, a reverse scaling calculation 11, a reverse differential pressure correction calculation 10, and a reverse differential pressure calculation 9.

逆ＰＷＭ演算１２は、式（４）で演算されたｐｗｍを逆の方向に演算して、ｄｐｓｃａｌｅｄ'を下記式（５）により演算する。 The inverse PWM calculation 12 calculates pwm calculated by the equation (4) in the reverse direction, and calculates dpscaled ′ by the following equation (5).

Figure 0004997997
Figure 0004997997

逆スケーリング演算１１は、式（３）で演算されたｄｐｓｃａｌｅｄを逆の方向に演算して、ｄｐｃｏｍｐ'を下記式（６）により演算する。 The inverse scaling calculation 11 calculates dpscaled calculated by the equation (3) in the reverse direction, and calculates dpcomp ′ by the following equation (6).

Figure 0004997997
Figure 0004997997

逆差圧補正演算１０は、式（２）で演算されたｄｐｃｏｍｐを逆の方向に演算して、Ｘ'を下記式（７）により演算する。 The reverse differential pressure correction calculation 10 calculates dpcomp calculated by the equation (2) in the reverse direction, and calculates X ′ by the following equation (7).

Figure 0004997997
Figure 0004997997

逆差圧演算９は、式（１）で演算されたＸを逆の方向に演算して、ｆｃ２'を下記式（８）により演算する。 The reverse differential pressure calculation 9 calculates X calculated in the formula (1) in the reverse direction, and calculates fc 2 ′ by the following formula (8).

Figure 0004997997
Figure 0004997997

演算値一致判定手段１３は、それぞれ対応する順方向演算手段３と逆方向演算手段８の演算値が一致するかを判定する。例えば、順方向演算手段３のうち式（３）で演算されたｄｐｓｃａｌｅｄと逆方向演算手段８のうち式（５）で演算されたｄｐｓｃａｌｅｄ'が一致するか判定する。同様に、ｄｐｃｏｍｐとｄｐｃｏｍｐ'、ＸとＸ'、ｆｃ２とｆｃ２'を、それぞれ一致するか判定する。なお、判定手段１４は、逆方向演算手段８と演算値一致判定手段１３から構成される。 The calculation value coincidence determination means 13 determines whether the calculation values of the corresponding forward direction calculation means 3 and reverse direction calculation means 8 match each other. For example, it is determined whether dpscaled calculated by the expression (3) in the forward calculation means 3 and dpscaled ′ calculated by the expression (5) in the backward calculation means 8 match. Similarly, it is determined whether dpcomp and dpcomp ′, X and X ′, and fc 2 and fc 2 ′ match. The determination unit 14 includes a backward direction calculation unit 8 and a calculation value match determination unit 13.

演算値一致判定手段１３は、演算結果に不一致を生じ異常と判定したとき、修復手段１７は、演算値一致判定手段１３の出力に基づき、不一致の異常を発生したステップの演算を修復する。例えば、差圧演算４が行う式（１）の演算において、ＲＡＭ ２３に記憶された定数Ａがノイズによって変更されたとき、演算値Ｘは逆差圧補正演算１０の演算値Ｘ'と不一致となる。そのため、修復手段１７は、式（１）に関連する定数Ａ、Ｂ、Ｃを変更前の正常な値に変更する（復帰させる）ことによって、差圧演算４の演算結果の異常を修復でき、正常な演算に復帰させることができる。   When the calculation value coincidence determination unit 13 determines that the calculation result does not match and is abnormal, the repair unit 17 repairs the calculation at the step in which the mismatch abnormality occurred based on the output of the calculation value match determination unit 13. For example, in the calculation of Expression (1) performed by the differential pressure calculation 4, when the constant A stored in the RAM 23 is changed by noise, the calculated value X does not match the calculated value X ′ of the reverse differential pressure correction calculation 10. . Therefore, the restoration means 17 can repair the abnormality of the calculation result of the differential pressure calculation 4 by changing (returning) the constants A, B, and C related to the expression (1) to normal values before the change, Normal operation can be restored.

修復手段１７の出力は、差圧演算４のほか、差圧補正演算５、スケーリング演算６、ＰＷＭ演算７にも入力され、修復手段１７は、演算結果に異常を生じた各ステップの演算に対し修復を行う。なお、修復手段１７は、逆方向演算手段８の各ステップの演算に対し修復を行ってもよい。   In addition to the differential pressure calculation 4, the output of the restoration means 17 is also input to the differential pressure correction calculation 5, the scaling calculation 6, and the PWM calculation 7. The restoration means 17 performs the calculation for each step in which an abnormality has occurred in the calculation result. Perform repairs. The repairing unit 17 may repair the calculation of each step of the backward calculation unit 8.

つぎに、図３のフローチャートを用いて、前記一致判定と修復の特徴部分について説明する。   Next, the matching determination and restoration characteristic portions will be described with reference to the flowchart of FIG.

順方向演算手段３において、差圧演算４などの各ステップの演算を行い演算値を保持する（Ｓ１）。逆方向演算手段８において、逆ＰＷＭ演算１２などの各ステップの演算を行い演算値を保持する（Ｓ２）。   The forward calculation means 3 calculates each step such as the differential pressure calculation 4 and holds the calculated value (S1). In the reverse direction calculation means 8, the calculation of each step such as the reverse PWM calculation 12 is performed and the calculated value is held (S2).

演算値一致判定手段１３が、それぞれ保持され対応する順方向演算手段３と逆方向演算手段８の各ステップの演算値の一致判定を行い（Ｓ３）、一致していれば演算結果は正常なので、Ｓ１から繰り返す。   The calculation value coincidence determination means 13 determines the coincidence of the calculation values at the respective steps of the forward direction calculation means 3 and the reverse direction calculation means 8 that are held and correspond to each other (S3). Repeat from S1.

一方、不一致であれば、修復手段１７が演算結果に異常を生じたステップに対し、Ｎ回（Ｎは１以上の自然数）修復を行ったかを判断し（Ｓ４）、行っていなければ修復を行い（Ｓ５）、Ｓ１から繰り返す。なお、行っていたときに実施するＳ６、Ｓ７については後述する。なお、演算値一致判定手段１３は、演算値同士が一致するときのほか、演算値同士の差が所定の値の範囲内であるときに一致すると判定してもよい。   On the other hand, if they do not match, it is determined whether the repairing unit 17 has repaired N times (N is a natural number of 1 or more) for the step in which the calculation result is abnormal (S4). (S5) Repeat from S1. Note that S6 and S7, which are performed when it is performed, will be described later. The calculation value match determination means 13 may determine that the calculation values match when the calculation values match, or when the difference between the calculation values is within a predetermined value range.

順方向演算手段３、逆方向演算手段８、演算値一致判定手段１３などは、マイクロプロセッサ１９によって実現し、ＥＥＰＲＯＭ ２２、ＲＡＭ ２３、ＲＯＭ ２４がマイクロプロセッサ１９に接続されてもよい。   The forward direction calculation unit 3, the reverse direction calculation unit 8, the calculation value match determination unit 13, and the like may be realized by the microprocessor 19, and the EEPROM 22, the RAM 23, and the ROM 24 may be connected to the microprocessor 19.

本実施例によって、測定物理量に基づく電気信号に対し、複数ステップの演算を行う測定機器に関し、演算結果の異常を判定し、その異常の修復を行い、正常な動作に復帰させることによって、信頼性を高めた測定機器を実現できる。 According to the present embodiment, with respect to a measuring device that performs a multi-step operation on an electrical signal based on a measured physical quantity, reliability is determined by determining an abnormality in the operation result, repairing the abnormality, and returning to normal operation. Can be achieved.

［第２の実施例］
第２の実施例を図２を用いて説明する。図２は、本発明を適用した測定機器の１つである差圧伝送器のブロック図であり、図１と同一のものは同一符号を付し説明を省略する。本実施例は、各ステップの演算にテスト用の模擬入力値に対する演算を行わせ、別の演算手段に前記模擬入力値に対する同様の演算を行わせ、両方の演算値の一致判定と修復を行うものである。 [Second Embodiment]
A second embodiment will be described with reference to FIG. FIG. 2 is a block diagram of a differential pressure transmitter which is one of measuring instruments to which the present invention is applied. The same components as those in FIG. In this embodiment, the calculation at each step is calculated for the simulated input value for testing, and another calculation means is configured to perform the same calculation for the simulated input value, thereby performing coincidence determination and restoration of both the calculated values. Is.

差圧伝送器４５は、圧力センサ１、計数手段２、ｆｃ演算３０、３３、ｆｒ演算３１、３４、その他の演算３２、３５、模擬演算値一致判定手段３７、模擬入力生成手段４０、、模擬入力演算手段３６、選択制御手段４１、選択手段３８、３９、出力手段２０、修復手段４２などから構成され、伝送線路２８を介し、負荷抵抗２７、上位機器２９、直流電源２６に接続されている。   The differential pressure transmitter 45 includes a pressure sensor 1, a counting unit 2, fc computations 30 and 33, fr computations 31 and 34, other computations 32 and 35, a simulated computation value match determination unit 37, a simulated input generation unit 40, a simulation The input calculating means 36, the selection control means 41, the selection means 38 and 39, the output means 20, the restoration means 42, etc., are connected to the load resistor 27, the host device 29, and the DC power supply 26 via the transmission line 28. .

ｆｃ演算３０、３３は、式（１）の演算のうち、Ａ・ｆｃ２の演算を行い、ｆｒ演算３１、３４は、ｆｃ演算３０、３３の演算値に、Ｂ・ｆｒ２を加算する。その他の演算３２、３５は、式（１）のうちのＣを加算することと式（２）、（３）、（４）を行う。なお、模擬入力演算手段３６は、ｆｃ演算３３、ｆｒ演算３４、その他の演算３５から構成される。 The fc computations 30 and 33 perform A · fc 2 computation of the formula (1), and the fr computations 31 and 34 add B · fr 2 to the computation values of the fc computations 30 and 33. The other operations 32 and 35 perform addition of C in Expression (1) and Expressions (2), (3), and (4). The simulated input calculation means 36 includes an fc calculation 33, an fr calculation 34, and other calculations 35.

圧力センサ１が圧力を検出し、それに基づき各ステップで差圧値などを演算する通常の演算（演算の異常判定を行わない）を行うときには、選択手段３８、３９は、選択制御手段４１の出力する選択制御信号に基づき、Ｌを選択する。なお同様に、その他の演算３２、３５の中にも、各ステップの演算に対しそれぞれ選択手段を備える。   When the pressure sensor 1 detects a pressure and performs a normal calculation (no abnormality determination of calculation is performed) in which a differential pressure value is calculated at each step based on the pressure, the selection means 38 and 39 output the selection control means 41. Based on the selection control signal to be selected, L is selected. Similarly, the other computations 32 and 35 are each provided with a selection means for each step computation.

図４は、演算の異常判定と修復の動作を示すフローチャートであり、これを用いて、一致判定と修復の特徴部分について説明する。   FIG. 4 is a flow chart showing the operation abnormality determination and repair operation, and the matching judgment and repair feature parts will be described using this flowchart.

模擬入力生成手段４０は、各ステップの演算に入力するためのテスト用の模擬の値（以下、「模擬入力値」という）を生成し、模擬入力値を選択手段と模擬入力演算手段３６に出力する（Ｓ８）。選択制御手段４１は、模擬入力生成手段４０の出力に基づき、選択制御信号を選択手段に出力する。選択手段のいづれか１つは、選択制御信号に基ずきＲを選択し、模擬入力値を各ステップの演算に出力して、各ステップの演算は、模擬入力値に基づき演算を行い演算値を保持する（Ｓ９）。   The simulated input generation means 40 generates a simulated value for testing (hereinafter referred to as “simulated input value”) to be input to the calculation at each step, and outputs the simulated input value to the selection means and the simulated input calculation means 36. (S8). The selection control unit 41 outputs a selection control signal to the selection unit based on the output of the simulated input generation unit 40. One of the selection means selects R based on the selection control signal, outputs the simulated input value to the calculation of each step, and the calculation of each step performs the calculation based on the simulated input value and outputs the calculated value. Hold (S9).

同様に、模擬入力演算手段３６の中のｆｃ演算３３などは、選択制御信号に基ずき、模擬入力値に対しｆｃ演算３０などの各ステップの演算と同様の演算を行い、演算値を保持する（Ｓ１０）。その後、選択制御手段４１は、選択手段をＬに選択するための選択制御信号を選択手段に出力し、選択手段はＬを選択し（Ｓ１１）、差圧伝送器４５は通常の演算を行う。   Similarly, the fc calculation 33 in the simulated input calculation means 36 performs the same calculation as the calculation in each step such as the fc calculation 30 on the simulated input value based on the selection control signal, and holds the calculated value. (S10). Thereafter, the selection control means 41 outputs a selection control signal for selecting the selection means to L to the selection means, the selection means selects L (S11), and the differential pressure transmitter 45 performs a normal calculation.

模擬演算値一致判定手段３７が、それぞれ保持された演算値同士（例えば、ｆｃ演算３０、３３の演算値）の一致判定を行い（Ｓ１２）、一致していれば演算結果は正常なので、Ｓ８から繰り返す。   The simulated calculation value match determination means 37 performs a match determination between the stored calculation values (for example, the calculation values of the fc calculations 30 and 33) (S12). If they match, the calculation result is normal. repeat.

一方、不一致であれば、修復手段４２が演算結果に異常を生じたステップに対し、Ｎ回（Ｎは１以上の自然数）修復を行ったかを判断し（Ｓ１３）、行っていなければ修復を行い（Ｓ１４）、Ｓ８から繰り返す。なお、行っていたときに実施するＳ１５、Ｓ１６については後述する。なお、模擬演算値一致判定手段３７は、演算値同士が一致するときのほか、演算値同士の差が所定の値の範囲内であるときに一致すると判定してもよい。   On the other hand, if they do not match, it is determined whether or not the repair means 42 has repaired N times (N is a natural number of 1 or more) for the step in which the calculation result is abnormal (S13). (S14) and S8 are repeated. Note that S15 and S16, which are performed when it is performed, will be described later. The simulated calculation value match determination means 37 may determine that the calculation values match when the calculation values match, or when the difference between the calculation values is within a predetermined value range.

例えば、ｆｃ演算３０の異常判定を行うとき、模擬入力生成手段４０は、ｆｃに入力する模擬入力値を生成出力し、選択手段のうち選択手段３８が選択制御信号に基づきＲを選択する。ｆｃ演算３０は、模擬入力値ｆｃに対し、Ａ・ｆｃ２の演算を行い、ｆｃ演算３３も同様に、模擬入力ｆｃに対しＡ・ｆｃ２の演算を行う。模擬演算値一致判定手段３７は、ｆｃ演算３０、３３の演算値同士の一致判定を行う。 For example, when the abnormality determination of the fc calculation 30 is performed, the simulated input generation unit 40 generates and outputs a simulated input value input to fc, and the selection unit 38 of the selection units selects R based on the selection control signal. The fc calculation 30 calculates A · fc 2 for the simulated input value fc, and the fc calculation 33 similarly calculates A · fc 2 for the simulated input fc. The simulation calculation value coincidence determination means 37 performs a coincidence determination between the calculation values of the fc calculations 30 and 33.

ここで、ｆｃ演算３０で使用するＲＡＭ ２３に記憶された定数Ａがノイズによって変更されて不一致となったとき、修復手段４２は、その定数Ａを変更前の正常な値に変更する（復帰させる）ことによって、ｆｃ演算３０の演算結果の異常を修復でき、正常な演算に復帰させられる。なお、ｆｃ演算３３で使用する定数Ａは別の記憶場所に記憶されていて、ノイズによって変更されていない。 Here, when the constant A stored in the RAM 23 used in the fc calculation 30 is changed due to noise and becomes inconsistent, the repair unit 42 changes (returns) the constant A to a normal value before the change. Thus, the abnormality of the calculation result of the fc calculation 30 can be repaired, and the normal calculation can be restored. The constant A used in the fc calculation 33 is stored in another storage location and is not changed by noise.

同様に、ｆｒ演算３１の異常判定を行うとき、模擬入力生成手段４０は、Ａ・ｆｃ２とｆｒに入力する２つの模擬入力値を生成出力し、選択手段のうち選択手段３９が選択制御信号に基づきＲを選択する。ｆｒ演算３１は、模擬入力値Ａ・ｆｃ２とｆｒに対し、Ａ・ｆｃ２＋Ｂ・ｆｒ２の演算を行い、ｆｒ演算３４も同様に、模擬入力値Ａ・ｆｃ２とｆｒに対し、Ａ・ｆｃ２＋Ｂ・ｆｒ２の演算を行う。模擬演算値一致判定手段３７は、ｆｒ演算３１、３４の演算値同士の一致判定を行う。 Similarly, when the abnormality determination of the fr calculation 31 is performed, the simulated input generation unit 40 generates and outputs two simulated input values input to A · fc 2 and fr, and the selection unit 39 among the selection units selects the selection control signal. R is selected based on fr operation 31, compared simulated input value A · fc 2 and fr, performs an operation of A · fc 2 + B · fr 2, similarly fr operation 34, with respect to the simulated input value A · fc 2 and fr, A・ Calculate fc 2 + B · fr 2 . The simulated calculation value coincidence determination means 37 performs a coincidence determination between the calculation values of the fr calculations 31 and 34.

ここで、ｆｒ演算３１に使用するＲＡＭ ２３に記憶された定数Ｂがノイズによって変更されて不一致となったとき、修復手段４２は、その定数Ｂを変更前の正常な値に変更する（復帰させる）ことによって、ｆｒ演算３１の演算結果の異常を修復でき、正常な演算に復帰させられる。なお、ｆｒ演算３４で使用する定数Ｂは別の記憶場所に記憶されていて、ノイズによって変更されていない。そして、各ステップの他の演算に対し同様の動作を行う。 Here, when the constant B stored in the RAM 23 used for the fr calculation 31 is changed due to noise and becomes inconsistent, the repair means 42 changes (returns) the constant B to a normal value before the change. Thus, the abnormality of the calculation result of the fr calculation 31 can be repaired, and the normal calculation can be restored. Note that the constant B used in the fr calculation 34 is stored in a different storage location and is not changed by noise. And the same operation | movement is performed with respect to the other calculation of each step.

なお、修復手段４２は、模擬入力演算手段３６の各ステップの演算に対し修復を行ってもよい。ｆｃ演算３０、３３、ｆｒ演算３１、３４、その他の演算３２、３５、模擬演算値一致判定手段３７、模擬入力生成手段４０、模擬入力演算手段３６、選択制御手段４１、選択手段３８、３９などは、マイクロプロセッサ４４によって実現し、ＥＥＰＲＯＭ ２２、ＲＡＭ ２３、ＲＯＭ ２４がマイクロプロセッサ４４に接続されてもよい。 The repair means 42 may repair the calculation of each step of the simulated input calculation means 36. fc calculations 30, 33, fr calculations 31, 34, other calculations 32, 35, simulated calculation value match determination means 37, simulated input generation means 40, simulated input calculation means 36, selection control means 41, selection means 38, 39, etc. May be realized by the microprocessor 44, and the EEPROM 22, the RAM 23, and the ROM 24 may be connected to the microprocessor 44.

次に、図１の演算値一致判定手段１３の結果に基づき、図２の模擬入力値で演算値の一致判定と修復を行う場合について説明する。   Next, based on the result of the calculation value match determination unit 13 in FIG. 1, a case where the calculation value match determination and restoration are performed with the simulated input value in FIG. 2 will be described.

図３のＳ３において不一致のとき、図４のＳ８以降を行う。例えば、図１の差圧演算４は、図２のｆｃ演算３０、ｆｒ演算３１などから構成されている。まず、選択手段はＬを選択し、図３のＳ１とＳ２が行われ、演算値一致判定手段１３は、差圧演算４の演算値Ｘと逆差圧補正演算１０の演算値Ｘ'の一致判定を行い（図３のＳ３）、不一致であれば図４のＳ８以降を行う。そして、差圧演算４を構成するｆｃ演算３０、ｆｒ演算３１に対し、順番に模擬入力値を入力して演算結果の異常判定と修復を行う。これによって、差圧演算４の演算を細分化し、異常を発生した演算個所を特定し修復できる。差圧補正演算５などにも同様の動作を行う。   When there is a mismatch in S3 of FIG. 3, S8 and subsequent steps in FIG. For example, the differential pressure calculation 4 in FIG. 1 includes the fc calculation 30 and the fr calculation 31 in FIG. First, L is selected as the selection means, and S1 and S2 in FIG. 3 are performed. The calculation value coincidence determination means 13 determines whether the calculation value X of the differential pressure calculation 4 and the calculation value X ′ of the reverse differential pressure correction calculation 10 match. (S3 in FIG. 3), and if not coincident, S8 and subsequent steps in FIG. 4 are performed. Then, simulated input values are sequentially input to the fc calculation 30 and the fr calculation 31 constituting the differential pressure calculation 4 to perform abnormality determination and repair of the calculation result. Thereby, the calculation of the differential pressure calculation 4 can be subdivided, and the calculation part where the abnormality has occurred can be identified and repaired. The same operation is performed for the differential pressure correction calculation 5 and the like.

本実施例によって、測定物理量に基づく電気信号に対し、複数ステップの演算を行う測定機器に関し、演算結果の異常を判定し、その異常の修復を行い、正常な動作に復帰させることによって、信頼性を高めた測定機器を実現できる。 According to the present embodiment, with respect to a measuring device that performs a multi-step operation on an electrical signal based on a measured physical quantity, reliability is determined by determining an abnormality in the operation result, repairing the abnormality, and returning to normal operation. Can be achieved.

［第３の実施例］
第３の実施例を図１から図４を用いて説明する。図１、２の差圧伝送器２５、４５は、それぞれ修復手段１７、４２の結果に基づき動作する停止手段１８、４３を備える。その動作を図３、４のフローチャートを用いて説明する。 [Third embodiment]
A third embodiment will be described with reference to FIGS. The differential pressure transmitters 25 and 45 of FIGS. 1 and 2 include stop means 18 and 43 that operate based on the results of the repair means 17 and 42, respectively. The operation will be described with reference to the flowcharts of FIGS.

演算値一致判定手段１３、模擬演算値一致判定手段３７における演算値の一致判定で不一致となり（Ｓ３、Ｓ１２）、修復手段１７、４２が、異常を発生した演算に対しすでにＮ回修復を行っていたとき（Ｓ４、Ｓ１３）、停止手段１８、４３は、その演算を停止させる（Ｓ６、Ｓ１５）。   The calculation value match determination means 13 and the simulation calculation value match determination means 37 do not match in the calculation value match determination (S3, S12), and the repair means 17, 42 have already repaired N times for the calculation in which an abnormality has occurred. (S4, S13), the stopping means 18, 43 stop the calculation (S6, S15).

例えば、差圧演算４の演算結果Ｘに異常が発生したとき、停止手段１８は、定数Ａ、Ｂ、Ｃをゼロに変更し固定することによってＸは常にゼロとなり、差圧演算４の演算機能を停止させることができる。なお、停止手段１８、４３は、逆方向演算手段８、模擬入力演算手段３６の各ステップの演算を停止してもよい。   For example, when an abnormality occurs in the calculation result X of the differential pressure calculation 4, the stop unit 18 changes the constants A, B, and C to zero and fixes them so that X always becomes zero. Can be stopped. The stop means 18 and 43 may stop the calculation of each step of the reverse direction calculation means 8 and the simulated input calculation means 36.

本実施例によって、測定機器内部のメモリなどの故障によって、異常を修復できないときに演算を停止させ、例えばプラント設備に対し、測定機器の異常により発生する損害を抑えることによって、信頼性、安全性を高めた測定機器を実現できる。 According to the present embodiment, the calculation is stopped when the abnormality cannot be repaired due to a failure of the memory inside the measuring device, for example, to reduce the damage caused by the abnormality of the measuring device to the plant equipment, thereby improving the reliability and safety. Can be achieved.

［第４の実施例］
第４の実施例を図１から図４を用いて説明する。図３、４において、演算値一致判定手段１３、模擬演算値一致判定手段３７における演算値の一致判定で不一致となり（Ｓ３、Ｓ１２）、修復手段１７、４２が、異常を発生した演算に対しすでにＮ回修復を行っていたとき（Ｓ４、Ｓ１３）、差圧伝送器２５、４５は、異常情報を上位機器２９などの外部機器に伝送する（Ｓ７、Ｓ１６）。 [Fourth embodiment]
A fourth embodiment will be described with reference to FIGS. 3 and 4, the calculation value match determination means 13 and the simulated calculation value match determination means 37 do not match in the calculation value match determination (S 3, S 12). When repairing has been performed N times (S4, S13), the differential pressure transmitters 25, 45 transmit abnormality information to an external device such as the host device 29 (S7, S16).

異常情報は、異常を発生した演算やＮ回修復を行ったことなどの情報からなり、図１、２において、異常情報を有したとき、その情報に基づき出力値切換え手段１６は、異常警報手段１５の出力を選択し出力する。異常警報手段１５の出力は、出力手段２０によって負荷抵抗２７にバーンアウト電流を流すためのディーティー比を有するＰＷＭ信号である。そして、差圧伝送器のユーザーや製造業者は、上位機器２９でバーンアウト電流値を見ることによって、差圧伝送器の演算値不一致による異常を認識できる。なお、バーンアウト電流を流すことも異常情報の１つである。   The abnormality information is made up of information such as the operation that caused the abnormality and N times of repairs. In FIGS. 1 and 2, when the abnormality information is present, the output value switching means 16 is based on the information, and the abnormality alarm means 15 outputs are selected and output. The output of the abnormality alarm means 15 is a PWM signal having a duty ratio for allowing a burnout current to flow through the load resistor 27 by the output means 20. Then, the user or manufacturer of the differential pressure transmitter can recognize an abnormality caused by the mismatch of the calculation values of the differential pressure transmitter by viewing the burnout current value on the host device 29. Note that the flow of burnout current is also one of abnormal information.

また、通信手段２１、出力手段２０は、異常情報を伝送線路２８を介し上位機器２９に送信し、ユーザーや製造業者は上位機器２９において、差圧伝送器の演算値不一致による異常を認識できる。なお、通信プロトコルにはハート通信のほか、フィールドバス通信（ファウンデーションフィールドバス、プロフィーバス通信など）などがある。   Further, the communication means 21 and the output means 20 transmit abnormality information to the upper device 29 via the transmission line 28, and the user or manufacturer can recognize the abnormality due to the operation value mismatch of the differential pressure transmitter in the upper device 29. Communication protocols include heart communication, field bus communication (foundation field bus, profibus communication, etc.), and the like.

本実施例によって、測定機器の異常箇所を特定し、ユーザーなどに知らせることによって、ユーザーなどは調査工数を低減し、発生した異常の履歴を上位機器において管理可能とする測定機器を実現できる。 According to the present embodiment, it is possible to realize a measuring device in which an abnormal portion of the measuring device is identified and notified to the user, so that the user or the like can reduce the number of investigation steps and manage the history of the generated abnormality in the host device.

なお、フィールド機器には、差圧伝送器のほか、測定物理量である温度や流量を測定する温度伝送器や渦流量計、電磁流量計、超音波流量計、コリオリ流量計などの各種流量計などがある。温度伝送器には、圧力センサ１の代わりに熱電対や測温抵抗体が、計数手段２の代わりに電圧増幅器とＡＤコンバータなどが用いられる。また、測定機器には、各種測定物理量を測定する信号変換器や記録計などがある。   In addition to differential pressure transmitters, field devices include temperature transmitters that measure physical quantities such as temperature and flow rates, and various flow meters such as vortex flow meters, electromagnetic flow meters, ultrasonic flow meters, and Coriolis flow meters. There is. In the temperature transmitter, a thermocouple or a resistance temperature detector is used instead of the pressure sensor 1, and a voltage amplifier and an AD converter are used instead of the counting means 2. In addition, the measurement equipment includes a signal converter and a recorder that measure various measurement physical quantities.

本発明を適用した差圧伝送器のブロック図である。It is a block diagram of a differential pressure transmitter to which the present invention is applied. 本発明を適用した差圧伝送器のブロック図の他の例である。It is another example of the block diagram of the differential pressure transmitter to which the present invention is applied. 本発明を適用した差圧伝送器の動作フローチャートである。It is an operation | movement flowchart of the differential pressure transmitter to which this invention is applied. 本発明を適用した差圧伝送器の動作フローチャートの他の例である。It is another example of the operation | movement flowchart of the differential pressure transmitter to which this invention is applied. 従来の差圧伝送器のブロック図である。It is a block diagram of the conventional differential pressure transmitter.

符号の説明Explanation of symbols

１ 圧力センサ
２ 計数手段
３ 順方向演算手段
４ 差圧演算
５ 差圧補正演算
６ スケーリング演算
７ ＰＷＭ演算
８ 逆方向演算手段
９ 逆差圧演算
１０ 逆差圧補正演算
１１ 逆スケーリング演算
１２ 逆ＰＷＭ演算
１３ 演算値一致判定手段
１４ 判定手段
１５ 異常警報手段
１６ 出力値切換え手段
１７ 修復手段
１８ 停止手段
１９ マイクロプロセッサ
２０ 出力手段
２１ 通信手段
２５ 差圧伝送器 DESCRIPTION OF SYMBOLS 1 Pressure sensor 2 Counting means 3 Forward calculation means 4 Differential pressure calculation 5 Differential pressure correction calculation 6 Scaling calculation 7 PWM calculation 8 Reverse direction calculation means 9 Reverse differential pressure calculation 10 Reverse differential pressure correction calculation 11 Reverse scaling calculation 12 Reverse PWM calculation 13 Calculation Value coincidence determination means 14 Determination means 15 Abnormal alarm means 16 Output value switching means 17 Repair means 18 Stop means 19 Microprocessor 20 Output means 21 Communication means 25 Differential pressure transmitter

Claims (6)

測定物理量に基づく電気信号に対し複数ステップの演算を行う測定機器において、
前記複数ステップのうち各ステップの演算結果の異常を判定する判定手段と、
前記判定手段の結果に基づき前記演算結果の異常を修復する修復手段を備え、
前記判定手段は、
前記複数ステップを通常の演算方向とは逆の方向に進行させる逆方向演算手段と、
前記複数ステップのうち各ステップの演算値と前記逆方向演算の各ステップの演算値との一致判定を行う演算値一致判定手段と、
前記演算値一致判定手段によって不一致と判定されたステップの演算を構成する各演算に入力する値を生成する模擬入力生成手段と、
前記各ステップの演算を構成する各演算で通常の演算を行うときの値と前記模擬入力生成手段の出力値とを選択制御信号により選択し前記各ステップの演算を構成する各演算に出力する少なくとも１つの選択手段と、
前記模擬入力生成手段の出力に基づき前記選択制御信号を出力する選択制御手段と、
前記各ステップの演算を構成する各演算と同じ演算を前記模擬入力生成手段の出力値に行う模擬入力演算手段と、
前記模擬入力生成手段の出力値に対して演算された、前記演算値一致判定手段によって不一致と判定されたステップの演算を構成する各演算の演算値と前記模擬入力演算手段の演算値との一致判定を行う模擬演算値一致判定手段を備えた、
ことを特徴とする測定機器。 In measuring equipment that performs multi-step operations on electrical signals based on measured physical quantities,
Determination means for determining an abnormality in the calculation result of each step among the plurality of steps;
A repair unit that repairs the abnormality of the calculation result based on the result of the determination unit ,
The determination means includes
Reverse direction calculation means for causing the plurality of steps to travel in a direction opposite to the normal calculation direction;
A calculation value match determination means for performing a match determination between the calculated value of each step of the plurality of steps and the calculated value of each step of the backward calculation;
Simulated input generation means for generating a value to be input to each calculation constituting the calculation of the step determined to be inconsistent by the calculation value match determination means;
A value for performing a normal calculation in each calculation constituting the calculation of each step and an output value of the simulated input generating means are selected by a selection control signal and output to each calculation constituting the calculation of each step One selection means;
Selection control means for outputting the selection control signal based on the output of the simulated input generation means;
Simulated input calculation means for performing the same calculation as each calculation constituting the calculation of each step on the output value of the simulated input generation means;
The calculated value of each calculation constituting the calculation of the step determined to be inconsistent by the calculated value coincidence determining means calculated with respect to the output value of the simulated input generating means and the calculated value of the simulated input calculating means Provided with a simulated operation value match determination means for performing the determination,
Measuring equipment characterized by that. 前記複数ステップのうち各ステップの演算結果の異常が、前記修復手段による少なくとも１回以上の修復によって修復しないとき、そのステップの演算を停止させる停止手段を備えた、
ことを特徴とする請求項１に記載の測定機器。 When the abnormality of the calculation result of each step of the plurality of steps is not repaired by at least one or more repairs by the repairing means, the stop means for stopping the calculation of the step is provided.
The measuring instrument according to claim 1 . 前記停止手段は、前記修復しないステップの演算に用いられる定数をゼロに変更し固定する、The stopping means changes and fixes a constant used for the calculation of the step that is not repaired to zero,
ことを特徴とする請求項２に記載の測定機器。The measuring instrument according to claim 2. 前記修復手段は、前記複数ステップのうち演算結果に異常を発生したステップの演算に関連する値に所定の値を設定する、
ことを特徴とする請求項１から３のいずれかに記載の測定機器。 The repairing means sets a predetermined value to a value related to the calculation of the step in which an abnormality has occurred in the calculation result among the plurality of steps.
The measuring instrument according to any one of claims 1 to 3 , wherein 前記複数ステップのうち各ステップの演算結果の異常が、前記修復手段によって修復しないとき、その異常情報を伝送する、
ことを特徴とする請求項１から４のいずれかに記載の測定機器。 When the abnormality of the calculation result of each step among the plurality of steps is not repaired by the repairing means, the abnormality information is transmitted.
The measuring instrument according to any one of claims 1 to 4 , wherein 前記測定機器は、フィールド機器である、
ことを特徴とする請求項１から５のいずれかに記載の測定機器。 The measuring device is a field device,
The measuring instrument according to any one of claims 1 to 5 , wherein
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