Measurement arrangement
A measurement arrangement has a first satellite-based measurement facility, which works on the basis of signals of a first global satellite positioning system, for generating a first measured value, which indicates a location or a speed of the first measurement facility, and a measured value-based first accuracy value indicating the accuracy of the first measured value. A second satellite-based measurement facility is present, which works on the basis of signals of a second, different global satellite positioning system and serves for generating a second measured value, which indicates the location or the speed of the second measurement facility, and a second measured value-based accuracy value, which indicates the accuracy of the second measured value. The first and second satellite-based measurement facilities are connected to an evaluation facility, which carries out a plausibility check using the measured values and generates an error signal if the plausibility check delivers an implausible result.
1 . A measurement configuration, comprising:
measurement facilities, including:
a first satellite-based measurement facility, working on a basis of signals of a first global satellite positioning system, for generating a first measured value indicating a location or a speed of said first satellite-based measurement facility, and a first measured value-based accuracy value indicating an accuracy of the first measured value;
at least one second satellite-based measurement facility, working on a basis of signals of a second, different global satellite positioning system and serves for generating a second measured value indicating a location or a speed of the second satellite-based measurement facility, and a second measured value-based accuracy value indicating an accuracy of the second measured value;
at least one third measurement facility, which in each case serve for generating a third measured value, indicating a location or a speed of said at least one third measurement facility, and a third measured value-based accuracy value indicating an accuracy of the third measured value;
an evaluation facility connected to said first and second satellite-based measurement facilities and carrying out a plausibility check using the first and second measured values and/or the first and second measured value-based accuracy values of said first and second satellite-based measurement facilities and generating an error signal if the plausibility check delivers an implausible result and is regarded as failed; and
said evaluation facility configured to form a deviation value, which quantifies a deviation of the measured values of said measurement facilities from an estimated measured value, which said estimated measured value being estimated on a basis of the measured values of said measurement facilities of the measurement configuration, to form an accuracy value indicating an accuracy of deviation values, hereinafter referred to as a deviation value-based accuracy value, and to generate the error signal further from the deviation values and the deviation value-based accuracy value.
2 . The measurement configuration according to claim 1 , wherein said evaluation facility is configured to form a further deviation value, which quantifies a deviation between the first and second measured values among themselves or a deviation from a further estimated measured value, which has been estimated on a basis of at least one of the first and second measured values, to form a further deviation value-based accuracy value indicating an accuracy of the further deviation value, and to generate the error signal using the further deviation value and the further deviation value-based accuracy value.
3 . The measurement configuration according to claim 2 , wherein said evaluation facility regards the plausibility check as failed and generates the error signal if an amount of a quotient between the further deviation value and the further deviation value-based accuracy value attains or overshoots a deviation value-based limit value.
4 . The measurement configuration according to claim 1 , wherein said evaluation facility regards the plausibility check as failed and generates the error signal if the first measured value-based accuracy value attains or overshoots a first measured value-based limit value, the second measured value-based accuracy value attains or overshoots a second measured value-based limit value or both the first and second measured value-based accuracy values attain or overshoot their respective measured value-based limit value.
5 . The measurement configuration according to claim 1 , wherein:
said evaluation facility is configured to form per pair of said measurement facilities in each case one deviation value individual to said pair, which quantifies a deviation between the measured values of said measurement facilities of a respective said pair;
said evaluation facility is configured to form per said pair of said measurement facilities an accuracy value, individual to said pair, indicating the accuracy of the deviation value individual to said pair; and
said evaluation facility is configured to generate the error signal using deviation values individual to said pair and accuracy values individual to said pair.
6 . The measurement configuration according to claim 5 , wherein said evaluation facility regards the plausibility check as failed and generates the error signal if, in a case of at least one said pair, an amount of a quotient between the deviation value individual to said pair and the accuracy value individual to said pair attains or overshoots a deviation value-based limit value individual to said pair or a system-wide deviation value-based limit value.
7 . The measurement configuration according to claim 1 , further comprising:
an antenna, wherein said measurement facilities are connected to a same said antenna, use said same antenna jointly or individual; or
antennas, all said measurement facilities are in each case connected to an individually assigned one of said antennas and use antenna signals of said individually assigned antenna.
8 . The measurement configuration according to claim 1 , further comprising:
a computing facility; and
a memory storing software, said software, which when executed by said computing facility defines a mode of operation of said computing facility and said evaluation facility and said measurement facilities are formed by software program modules of said software.
9 . The measurement configuration according to claim 2 , wherein distances between said measurement facilities are taken into account when calculating further deviation values in that the further deviation values are corrected by taking into account the distances.
10 . A vehicle, comprising:
said measurement configuration according to claim 1 .
11 . The vehicle according to claim 10 , further comprising a vehicle controller, which, when the error signal is present, checks whether a speed of the vehicle has to be reduced or the vehicle has to be stopped.
12 . The vehicle according to claim 10 , further comprising a vehicle controller, which, when the error signal is present, reduces a speed of the vehicle or stops the vehicle.
13 . The vehicle according to claim 10 , wherein the vehicle is a rail vehicle.
14 . A method, which comprises the steps of:
generating a first measured value indicating a location or a speed of a first satellite-based measurement facility, and generating a measured value-based first accuracy value indicating an accuracy of the first measured value, with an aid of the first satellite-based measurement facility working on a basis of signals of a first global satellite positioning system;
generating a second measured value indicating a location or a speed of at least a second satellite-based measurement facility, and a second measured value-based accuracy value indicating an accuracy of the second measured value, with an aid of at least the second satellite-based measurement facility working on a basis of signals of a second, different global satellite positioning system;
generating a third measured value indicating a location or a speed of at least one third measurement facility, and a third measured value-based accuracy value indicating an accuracy of the third measured value;
determining a deviation value, which quantifies a deviation of the measured values from an estimated measured value, the estimated measured value being estimated on a basis of the measured values, to form an accuracy value indicating an accuracy of deviation values, hereinafter referred to as a deviation value-based accuracy value;
carrying out a plausibility check, and an error signal is generated if the plausibility check delivers an implausible result and is regarded as failed and to generate the error signal using the deviation values and the deviation value-based accuracy value.