Method for adjusting time stamps during the acquisition of sensor data

A method for synchronizing sensor data of at least one sensor system with a host time base of a host system, the method comprising:

• ascertaining and updating repeatedly a clock ratio of a host system to the at least one sensor system for at least two communication events, wherein, in each instance, a time stamp acquisition is performed, in which a sensor time stamp of a respective sensor time base and a host time stamp of the host time base are recorded, wherein the communication events for ascertaining the clock ratio relate to a specific quantity of data, and wherein in each instance, a duration of each of the communication events is measured for the time stamp acquisition;
• comparing each measured duration of one of the communication events to a comparison value, to detect possible irregularities in the communication event;
• and
• synchronizing the sensor data based on the clock ratio of the sensor time base of the at least one sensor system to the host time base of the host system,
• wherein the duration of the communication events is regularly measured for the time stamp acquisition;
• and the comparison value is determined and regularly updated on the basis of a plurality of values for the communication duration measured in this manner.

A method for synchronizing sensor data of at least one sensor system with a host time base of a host system, the method comprising:

• ascertaining and updating repeatedly a clock ratio of a host system to the at least one sensor system for at least two communication events, wherein, in each instance, a time stamp acquisition is performed, in which a sensor time stamp of a respective sensor time base and a host time stamp of the host time base are recorded, wherein the communication events for ascertaining the clock ratio relate to a specific quantity of data, and wherein in each instance, a duration of each of the communication events is measured for the time stamp acquisition;
• comparing each measured duration of one of the communication events to a comparison value, to detect possible irregularities in the communication event;
• and
• synchronizing the sensor data based on the clock ratio of the sensor time base of the at least one sensor system to the host time base of the host system,
• wherein an irregularity in a communication event for the time stamp acquisition is detected, if the measured duration of this communication event differs from the comparison value and lies outside of a specifiable tolerance range.

A method for synchronizing sensor data of at least one sensor system with a host time base of a host system, the method comprising:

• ascertaining and updating repeatedly a clock ratio of a host system to the at least one sensor system for at least two communication events, wherein, in each instance, a time stamp acquisition is performed, in which a sensor time stamp of a respective sensor time base and a host time stamp of the host time base are recorded, wherein the communication events for ascertaining the clock ratio relate to a specific quantity of data, and wherein in each instance, a duration of each of the communication events is measured for the time stamp acquisition;
• comparing each measured duration of one of the communication events to a comparison value, to detect possible irregularities in the communication event;
• and
• synchronizing the sensor data based on the clock ratio of the sensor time base of the at least one sensor system to the host time base of the host system,
• wherein the host time stamp of a time stamp acquisition is corrected and/or replaced by a calculated host time stamp, if an irregularity in the communication event of this time stamp acquisition is detected.

A method for synchronizing sensor data of at least one sensor system with a host time base of a host system, the method comprising:

• ascertaining and updating repeatedly a clock ratio of a host system to the at least one sensor system for at least two communication events, wherein, in each instance, a time stamp acquisition is performed, in which a sensor time stamp of a respective sensor time base and a host time stamp of the host time base are recorded, wherein the communication events for ascertaining the clock ratio relate to a specific quantity of data, and wherein in each instance, a duration of each of the communication events is measured for the time stamp acquisition;
• comparing each measured duration of one of the communication events to a comparison value, to detect possible irregularities in the communication event;
• and
• synchronizing the sensor data based on the clock ratio of the sensor time base of the at least one sensor system to the host time base of the host system,
• wherein during the determination of the clock ratio of the sensor time base of the at least one sensor system to the host time base of the host system, the contributions of the individual time stamp acquisitions are weighted;
• and this weighting is carried out as a function of the measured duration of the underlying communication event.

A device, comprising:

• a host system having a host time basis;
• at least one sensor system having a separate sensor time basis and having reading devices for reading out the sensor time stamps;
• and
• at least one communication link between the at least one sensor system and the host system
• a synchronizing device configured to synchronize the sensor data of the at least one sensor system with the host time base of the host system, by performing the following:
• ascertaining and updating repeatedly a clock ratio of the host system to the at least one sensor system for at least two communication events, wherein, in each instance, a time stamp acquisition is performed, in which a sensor time stamp of a respective sensor time base and a host time stamp of the host time base are recorded, wherein the communication events for ascertaining the clock ratio relate to a specific quantity of data, and wherein in each instance, a duration of each of the communication events is measured for the time stamp acquisition;
• comparing each measured duration of one of the communication events to a comparison value, to detect possible irregularities in the communication event;
• and
• synchronizing the sensor data based on the clock ratio of the sensor time base of the at least one sensor system to the host time base of the host system,
• wherein a total access time of the at least one communication event is measured for the time stamp acquisition.