3D sensor and method of monitoring a monitored zone
AssigneeSick AG
InventorsArmin Hornung, Matthias Neubauer, Lars Müller
Life of this patent
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Abstract
A 3D sensor for monitoring a monitored zone is provided, wherein the 3D sensor has at least one light receiver for generating a received signal from received light from the monitored zone and has a control and evaluation unit that is configured to detect objects in the monitored zone by evaluating the received signal and to determine the shortest distance of the detected objects from at least one reference volume, and to read at least one distance calculated in advance from the reference value from a memory for the determination of the respective shortest distance of a detected object.
Claims20
A 3D sensor for monitoring a monitored zone, wherein the 3D sensor comprises:
- at least one light receiver for generating a received signal from received light from the monitored zone and
- a control and evaluation unit having a memory, the control and evaluation unit detecting objects in the monitored zone by evaluating the received signal, determining the shortest distance of the detected objects from at least one reference volume, and reading at least one distance calculated in advance from the reference volume from a memory for the determination of the respective shortest distance of a detected object,
- wherein distances calculated in advance are stored in the memory in a 3D grid of the monitored zone,
- and wherein on a determination of a distance calculated in advance of a grid element of the 3D grid, the shortest distance is determined from a line of sight from the 3D sensor through the grid element itself and a part of the line of sight disposed behind it from a view of the 3D sensor.
A 3D sensor for monitoring a monitored zone wherein the 3D sensor comprises:
- at least one light receiver for generating a received signal from received light from the monitored zone and
- a control and evaluation unit having a memory, the control and evaluation unit detecting objects in the monitored zone by evaluating the received signal, determining the shortest distance of the detected objects from at least one reference volume, and reading at least one distance calculated in advance from the reference volume from a memory for the determination of the respective shortest distance of a detected object,
- wherein reference volumes can be activated and distances calculated in advance from at least one combination of reference volumes active in parallel are compiled from distances calculated in advance per reference volume.
A method of monitoring a monitored zone,
- wherein a received signal is generated and evaluated from received light from the monitored zone for the optical 3D monitoring to detect objects in the monitored zone and to determine the shortest distance of the detected objects from at least one reference volume,
- wherein distances calculated in advance are stored in a memory in a 3 D grid of the monitored zone,
- wherein at least one distance calculated in advance from the reference volume is read from the memory for the determination of the respective shortest distance of a detected object,
- and wherein on a determination of a distance calculated in advance of a grid element of the 3D grid, the shortest distance is determined from a line of sight from a 3D sensor through the grid element itself and a part of the line of sight disposed behind it from a view of the 3D sensor.
Dependencies are inferred from the claim text.