| 摘要 |
The invention relates to a method of validating a correct operation of a HMI (71), i.e. a human machine interface, comprising the following steps:
a) receiving input data comprising information to be indicated by the HMI (71) and supplying the input data to a first processor (69) of the HMI, and
b) processing (73) the input data using the first processor (69) according to a first predetermined procedure for producing indication data which unambiguously define the way an indication device of the HMI (71) has to indicate the information,
c) modifying (84) the indication data for the purpose of validating the correct operation of the HMI (71) and obtaining modified indication data,
d) outputting the modified indication data to a second processor (70),
e) inputting the modified indication data and the input data to the second processor (70)
f) processing (76) the modified indication data according to a second predetermined procedure for checking if the modified indication data are equivalent to the information to be indicated by the HMI (71) and outputting a corresponding check result,
g) deciding (77) that the validation was successful if the check result of step f) means that the modified indication data is not equivalent to the information to be indicated,
wherein the first predetermined procedure and the second predetermined procedure are exactly the same predetermined procedures as being performed during normal operation of the HMI (71), when the indication data are not modified. |
