Method and device for checking the plausibility of measured values in a motor vehicle environment
First Claim
1. A method of checking the plausibility of measured values of at least two sensors for a measured variable in a motor vehicle environment, each sensor supplying measured values of the variable continuously, the method comprising the following steps:
- (a) assigning a time stamp to each measured value Mi;
(b) deriving a plausibility window Pi from physical properties of the motor vehicle;
(c) testing whether a first measured value M1 supplied by a first sensor and a later second measured value M2 supplied by a second sensor differ by more than is specified by the plausibility window Pi, the time interval between a first measured value M1 and the second measured value M2 entering the derivation of the plausibility window Pi; and
(d) depending on a result of the testing, generating a plausibility signal.
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Accused Products
Abstract
A method, a device and a computer program product, by means of which sensor values of redundant sensors in vehicles can be compared with each other to carry out a plausibility check, the measured values of said sensors not being synchronized with each other, are described. On the basis of a first measured value in time, and using the physical properties of the vehicle, a plausibility window, in which a second, subsequent measured value of a different sensor must be to count as plausible, is formed. The determined plausibility of the measured values is indicated by means of a plausibility signal.
33 Citations
24 Claims
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1. A method of checking the plausibility of measured values of at least two sensors for a measured variable in a motor vehicle environment, each sensor supplying measured values of the variable continuously, the method comprising the following steps:
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(a) assigning a time stamp to each measured value Mi; (b) deriving a plausibility window Pi from physical properties of the motor vehicle; (c) testing whether a first measured value M1 supplied by a first sensor and a later second measured value M2 supplied by a second sensor differ by more than is specified by the plausibility window Pi, the time interval between a first measured value M1 and the second measured value M2 entering the derivation of the plausibility window Pi; and (d) depending on a result of the testing, generating a plausibility signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A device for checking the plausibility of the measured values Mi of at least two sensors for a measured variable in a motor vehicle environment, each sensor supplying measured values of the variable continuously, the device comprising:
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at least one input interface for receiving measured values of the at least two sensors, a time stamp being assigned to each measured value Mi; a processing unit which is operable to test whether a first measured value M1 of a first sensor differs from a later second measured value M2 of a second sensor by more than a plausibility window Pi specifies, the plausibility window Pi being derived from a physical properties of a motor vehicle, and with a time interval between the first measured value M1 and the second measured value M2 entering the derivation of the plausibility window Pi, the processing unit being further operable, depending on a result of the test, to generate a plausibility signal; and an output interface, via which a plausibility signal is output. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification