Method for verifying the plausibility of sensor information in a plant process

A method for verifying the plausibility of sensor information sensed by a sensor device associated with a plant process, in particular a water treatment process, wherein the sensor information relates to the plant process, the method comprising:

• receiving, by a control unit, the sensor information;
• performing, by the control unit, a verification model, the verification model determining an expected sensor information which the sensor device shall provide, wherein the verification model determines the expected sensor information based on at least one other information related to the plant process and having a relationship to the sensor information;
• comparing the expected sensor information with the received sensor information;
• and
• upon determining that the sensor information deviates from the expected sensor information, outputting, by the control unit, a verification signal.

A control unit for controlling a plant process, in particular a water treatment process, the control unit being communicatively coupled to a sensor device associated with the plant process and sensing sensor information related to the plant process, the control unit being configured to:

• receive the sensor information;
• perform a verification model, the verification model for determining an expected sensor information which the sensor device shall provide, wherein the verification model determines the expected sensor information based on at least one other information related to the plant process and having a relationship to the sensor information;
• compare the expected sensor information with the received sensor information;
• and
• output a verification signal upon determining that the sensor information deviates from the expected sensor information.

A computer program comprising instructions which, when the program is executed by a control unit for controlling a plant process, in particular a water treatment process, the control unit being communicatively coupled to a sensor device associated with the plant process and sensing sensor information related to the plant process, cause the control unit configured to:

• receive, by the control unit, the sensor information;
• perform, by the control unit, a verification model, the verification model determining an expected sensor information which the sensor device shall provide, wherein the verification model determines the expected sensor information based on at least one other information related to the plant process and having a relationship to the sensor information;
• compare the expected sensor information with the received sensor information;
• and
• upon determining that the sensor information deviates from the expected sensor information, outputting, by the control unit, a verification signal.