Method and apparatus for determining a relaxation time dependent parameter related to a system
AssigneePreSens—Precision Sensing GmbH
InventorGregor Liebsch
Life of this patent
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Abstract
A method for determining at least one parameter related to a system is disclosed, wherein the at least one parameter depends on at least one relaxation time of the system. The system is excited by a first series of electromagnetic excitation pulses, exhibiting a first defined time gap between consecutive excitation pulses. The response of the system to the first series of excitation pulses is integrated uninterruptedly over time, thus generating a first response signal. Likewise, by uninterrupted integration over time of at least one second response of the system, a second response-signal is generated. The at least one parameter is determined taking into account the first response-signal and the at least one second response-signal.
Claims19
A method for determining at least one parameter related to a system, the system exhibiting at least one relaxation time, the at least one parameter depending on the at least one relaxation time, the method comprising:
- exciting the system by a first series of electromagnetic excitation pulses exhibiting a first defined time gap between consecutive excitation pulses;
- determining a first response-signal by uninterrupted integration over time of a first response of the system to the first series of excitation pulses, the integration being done uninterruptedly over a plurality of pulse durations of the excitation pulses and defined time gaps between consecutive excitation pulses;
- determining at least one second response-signal by uninterrupted integration over time of at least one second response of the system;
- and
- determining the at least one parameter, taking into account therein the first response-signal and the at least one second response-signal.
A method for determining at least one parameter related to a system, the system exhibiting at least one relaxation time, the at least one parameter depending on the at least one relaxation time, the method comprising:
- exciting the system by a first series of electromagnetic excitation pulses exhibiting a first defined time gap between consecutive excitation pulses;
- determining a first response-signal by uninterrupted integration over time of a first response of the system to the first series of excitation pulses, a threshold for the first response of the system being set, the integration being done uninterruptedly over a plurality of pulse durations of the excitation pulses and defined time gaps between consecutive excitation pulses;
- selecting the first defined time gap between consecutive excitation pulses such that the first response of the system falls below the threshold within the selected first defined time gap between consecutive excitation pulses;
- determining at least one second response-signal by uninterrupted integration over time of at least one second response of the system, a threshold for the second response of the system being set;
- and
- determining the at least one parameter, taking into account therein the first response-signal and the at least one second response-signal.
An apparatus for determining at least one parameter related to an object, comprising:
- at least one sensor associated with the object;
- a light source configured to emit light from different wavelength ranges, in order to excite the at least one sensor to a luminescence required for the determination of a respective variable;
- a camera, suitable filters being provided in a beam paths from the light source to the sensor, and from the sensor to the camera;
- and
- a control unit and an evaluation unit connected with the camera and the light source,
- the control unit configured for causing the light source to excite the at least one sensor by emitting a first series of electromagnetic excitation pulses exhibiting a first defined time gap between consecutive excitation pulses, the evaluation unit configured for determining a first response-signal by uninterrupted integration over time of a first response of the system to the first series of excitation pulses, the integration being done uninterruptedly over a plurality of pulse durations of the excitation pulses and defined time gaps between consecutive excitation pulses.
Dependencies are inferred from the claim text.