METHOD FOR DIAGNOSING REDUNDANT MEASUREMENT CHANNELS (VERSIONS) Russian patent published in 2019 - IPC G01D18/00 

FIELD: measuring equipment.

SUBSTANCE: group of inventions relates to measurement equipment and can be used for diagnostics of redundant measuring channels (MC), which measure the same controlled parameter of object, in mode of continuous technological process. Group of inventions consists of three versions of "Diagnostics method of redundant measuring channels". According to the first version, the method includes the following operations: take and recording in the archive the readings of the diagnosed MC, as well as the readings of all adjacent MCs, measuring parameters, indirectly dependent on the parameter measured by the diagnosed MC; for each diagnosed MC the relative deviation δ_i is calculated and recorded in the archive readings from average arithmetic value M₁ by readings of all reserved MC; comparing deviation value δ_i with given tolerance limit, and if δ_i exceeds tolerable deviation limits, decision on fault MC is made in the absence of changes in readings of adjacent MC. Diagnostic technique according to the second version differs from the first one in that: diagnostic channels are used to isolate MC with maximum value of readings R_max and MC with minimum value of readings R_min; calculating difference MIS between readings R_max and R_min; comparing the MIS value with the specified boundary of the permissible difference of readings, and if it exceeds the MC failure decision is made in the absence of changes of the adjacent MC readings. Diagnosis method according to the third version differs from the second version in that deflection angle α between readings of selected MCs with maximum R_max and minimum R_min values of readings; comparing the value of α with the specified boundary of the maximum allowable angle of deviation, and if it exceeds the decision on failure MC is taken in the absence of changes in readings of adjacent MC.

EFFECT: high efficiency of diagnosing MC by taking into account presence of changes of controlled parameters, indirectly related to the parameter, which is measured by diagnosed MC.

3 cl, 4 dwg