Granted Patent B2

US 12,656,222 · App. 18/262,758 · Granted Jun 16, 2026

Inventors: Achim Reuther (Donaustauf, DE); Ludwig Schifferl (Pentling, DE)

Assignee: VITESCO TECHNOLOGIES GMBH

G01M15/102

Abstract

Claims (11)

1 . A method for detecting manipulation of a sensor including a measuring unit to measure a physical property and a control unit connected to the measuring unit to receive measurement signals from the measuring unit and to send control signals to the measuring unit, the method comprising:

sending a predetermined diagnostic signal to the measuring unit using the control unit;

receiving a response signal generated by the measuring unit in response to the predetermined diagnostic signal; and

identifying manipulation of the sensor if the response signal received deviates from a predetermined reference signal by more than a threshold value;

wherein the sensor comprises an exhaust gas sensor for detecting the nitrogen oxide and/or ammonia concentration in the exhaust gas tract of the internal combustion engine of a vehicle; and

the sensor comprises a ceramic-based sensor element.

2 . The method as claimed in claim 1 , further comprising repeating the method every time the sensor is put into operation.

3 . The method as claimed in claim 1 , wherein the predetermined diagnostic signal comprises a Dirac-type current pulses or an impedance measurement of electrodes of the measuring unit.

4 . The method as claimed in claim 1 , wherein the sensor is deployed in an aircraft, a land vehicle, a rail vehicle, a watercraft.

5 . The method as claimed in claim 1 , wherein the sensor is deployed in a hybrid vehicle with an internal combustion engine.

6 . The method as claimed in claim 1 , further comprising issuing a warning indicating manipulation of the sensor in response to detecting manipulation of the sensor.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (17)