Distance measuring method and distance measuring element
AssigneeLeica Geosystems AG
InventorReto Stutz
Life of this patent
Estimating the term…
Abstract
The invention relates to a distance measuring method comprising at least the step of emitting at least one measurement signal to a target object, in which at least one start signal is produced, and the measurement signal is back scattered from the target object as a target signal. Said target signal is sampled at a sampling frequency and the relative position of the start signal and the target signal is determined for deriving a distance to the target object from the relative position from the start signal and the target signal. The sampling frequency can be adjusted and is set in accordance with a large distance to the target object.
Claims20
A distance measuring method, comprising at least:
- emitting at least a first measurement signal to a target object, wherein at least one start signal is generated;
- receiving the measurement signal backscattered from the target object as a target signal;
- sampling the target signal with a sampling frequency and determining a relative position of the at least one start signal and the target signal, wherein the target signal is sampled at sampling points of a sampling pattern defined by the sampling frequency;
- and
- deriving a distance to the target object from the relative position of the start signal and the target signal;
- wherein the sampling frequency is adjustable and is set in a manner dependent on a coarse distance to the target object.
A distance measuring element comprising at least:
- a measurement signal source for emitting at least one measurement signal to a target object, wherein at least one start signal is generated;
- a receiver for detecting the measurement signal backscattered from the target object as a target signal;
- a sampling circuit for sampling the received target signal for determining the relative position of the start signal and the target signal, wherein the target signal is sampled at sampling points of a sampling pattern defined by a sampling frequency;
- a control and evaluation component for deriving a distance to the target object from a relative position of the start signal and the target signal;
- wherein the sampling circuit is designed such that the sampling frequency is adjustable and is settable.
Dependencies are inferred from the claim text.