TEST SYSTEM FOR A LiDAR SENSOR AND METHOD FOR TESTING A LiDAR SENSOR
A test system for a LiDAR sensor, which comprises a trigger detector and a signal generator connected to the trigger detector, the signal generating unit including a display panel having a predefined number of pixels, and the signal generator being configured to aggregate pixels of the same intensity into a cluster. A method for testing a LiDAR sensor is also provided.
1 . A test system for a LiDAR sensor, the test system comprising:
a trigger detector; and
a signal generator connected to the trigger detector, wherein the signal generator is controlled by the trigger detector in response to the receipt of a trigger signal of a LiDAR sensor to be tested, such that a predefined, artificially generated optical signal or an artificially generated reflection of the trigger signal is output by a signal generating unit of the signal generator, the signal generating unit including a display panel having a predefined number of pixels, and the signal generator being configured to aggregate pixels of the same intensity into a cluster.
2 . The test system according to claim 1 , wherein the signal generator includes at least two circuit boards, on each of which a plurality of digital/analog converters is arranged, each of the plurality of digital/analog converters being connected to an input of a plurality of crosspoint switches.
3 . The test system according to claim 2 , wherein particular outputs of the plurality of crosspoint switches are connected to a luminous element driver controlling a luminous element of the signal generating unit or a light-emitting diode or a laser diode.
4 . The test system according to claim 3 , wherein particular luminous elements of the signal generating unit of each of the plurality of circuit boards are connected to pixels of the display panel assigned to one of the particular luminous element via optical waveguides.
5 . The test system according to claim 3 , wherein the number of luminous elements of each circuit board is greater than the number of digital/analog converters, wherein the crosspoint switches arranged between the digital/analog converters and the luminous element drivers of the luminous elements are designed to provide a dynamically settable, coordinate connection between the digital/analog converters and the luminous elements.
6 . The test system according to claim 2 , wherein the plurality of digital/analog converters arranged on a particular circuit board may be controlled by an integrated circuit or an FPGA arranged on the particular circuit board or outside the particular circuit board.
7 . The test system according to claim 6 , wherein the integrated circuit or the FPGA is connected to an input of each of the plurality of digital/analog converters.
8 . The test system according to claim 2 , wherein the aggregated cluster of pixels of the same intensity is independent of a shape and/or a time delay of objects represented on the display panel within a measurement cycle of the LiDAR sensor to be tested, and wherein the pixels aggregated into the cluster are assigned to luminous elements of a plurality of circuit boards.
9 . The test system according to claim 2 , wherein each input of a crosspoint switch is switchable to a plurality of outputs of the crosspoint switch, and wherein each digital/analog converter is configured to control each luminous element.
10 . The test system according to claim 1 , wherein each cluster generated on the display panel of the signal generating unit is adapted in terms of its size and positioning on the display panel of the signal generating unit from measurement cycle to measurement cycle of the LiDAR sensor to be tested.
11 . The test system according to claim 1 , wherein an object represented on the display panel of the signal generating unit is divided into a plurality of clusters and the display panel of the signal generating unit includes a curved surface having a predefined radius.
12 . The test system according to claim 1 , wherein overlapping objects represented on the display panel of the signal generating unit in a measurement cycle, having different intensities and being situated one behind the other are aggregated into a cluster, and wherein distances between the objects are able to be represented by switching off the pixels for a predefined period of time.
13 . The test system according to claim 1 , wherein a pixel resolution and/or a number of representable intensity graduations of the display panel of the signal generating unit correspond(s) to at least one pixel resolution and/or a number of detectable intensity graduations of the LiDAR sensor.
14 . A method for testing a LiDAR sensor, the method comprising:
providing a trigger detector and a signal generator connected to the trigger detector;
providing a display panel of a signal generating unit of the signal generator, which has a predefined number of pixels;
controlling the signal generator by the trigger detector in response to a receipt of a signal of a LiDAR sensor to be tested such that a predefined, artificially generated optical signal or an artificially generated reflection of a LiDAR sensor signal, is output by the signal generating unit of the signal generator; and
aggregating pixels of the same intensity into a cluster using the signal generator.