MEASURING SYSTEM, USE OF AT LEAST ONE INDIVIDUALLY OPERABLE LED LIGHTING UNIT AS A SENDER UNIT IN A MEASURING SYSTEM, METHOD FOR OPERATING A MEASURING SYSTEM AND LIGHTING SOURCE HAVING A MEASURING SYSTEM
Provided is a measuring system ( 1 ), which comprises a sender unit ( 10 ) with at least one individually operable LED lighting unit ( 12 ) with a luminous area which has a characteristic longitudinal extent ( 107 ) of less than or equal to 100 μm and/or a surface area of less than or equal to 10 4 μm 2 , wherein the LED lighting unit ( 12 ) is configured to emit at least one light pulse as a sender signal ( 11 ) during operation, and comprises the one receiver unit ( 20 ) with at least one detector unit ( 22 ) for receiving a return signal ( 21 ), which comprises at least a part of the sender signal ( 11 ) reflected by an external object. Furthermore, use of at least one individually operable LED lighting unit as a sender unit in a measuring system, a method for operating a measuring system and a lighting source having a measuring system are provided.
1 . Measuring system ( 1 ), comprising:
a sender unit ( 10 ) with at least one individually operable LED lighting unit ( 12 ) with a luminous area ( 106 ), which has a characteristic longitudinal extent ( 107 ) of less than or equal to 100 μm and/or a surface area of less than or equal to 10 4 μm 2 , wherein the LED lighting unit ( 12 ) is configured to emit at least one light pulse as a sender signal ( 11 ) during operation, and
a receiver unit ( 20 ) with at least one detector unit ( 22 ) for receiving a return signal ( 21 ), which comprises at least a part of the sender signal ( 11 ) reflected by an external object.
2 . The measuring system ( 1 ) according to claim 1 , wherein the lighting unit ( 12 ) has a luminous area ( 106 ) with a rectangular basic shape and the characteristic longitudinal extent ( 107 ) is an edge length of the rectangular basic shape.
3 . The measuring system ( 1 ) according to one of the preceding claims, wherein the at least one light pulse has a pulse length of less than or equal to 10 ns.
4 . The measuring system ( 1 ) according to one of the preceding claims, wherein the at leas one LED lighting unit ( 12 ) is formed by a LED ( 100 ).
5 . The measuring system ( 1 ) according to one of the preceding claims, wherein the sender unit ( 10 ) comprises a segmented LED ( 100 ), which comprises a plurality of individually operable LED lighting units ( 12 ) in the form of luminous segments.
6 . The measuring system ( 1 ) according to one of the preceding claims, wherein the sender unit ( 10 ) comprises a plurality of LEDs ( 100 ) each having at least one LED lighting unit ( 12 ).
7 . The measuring system ( 1 ) according to one of the preceding claims, wherein the sender unit ( 10 ) is configured to successively emit light pulses during operation of various LED lighting units ( 12 ).
8 . The measuring system ( 1 ) according to one of the preceding claims, wherein the sender unit ( 10 ) comprises a plurality of LED lighting units ( 12 ), which emit in different solid angle ranges.
9 . The measuring system ( 1 ) according to one of the preceding claims, wherein the sender unit ( 10 ) comprises a plurality of LED lighting units ( 12 ), which emit in a same solid angle range.
10 . The measuring system ( 1 ) according to one of the preceding claims, wherein the sender unit ( 10 ) comprises a wavelength conversion substance ( 111 ), which is configured to convert at least part of the primary light generated by the LED lighting unit ( 12 ) during operation into secondary light different from the primary light, wherein the wavelength conversion substance ( 111 ) has an excitation and deactivation time of in each case less than or equal to 10 ns.
11 . The measuring system ( 1 ) according to claim 10 , wherein the wavelength conversion substance ( 111 ) has an excitation and/or deactivation time of more than 10 ns and the receiver unit ( 20 ) comprises a filter, which is impermeable to the secondary light.
12 . The measuring system ( 1 ) according to one of claims 1 to 11 , wherein the receiver unit ( 20 ) comprises exactly one detector unit ( 22 ) for the detection of a plurality of return signals ( 21 ).
13 . The measuring system ( 1 ) according to one of claims 1 to 11 , wherein the receiver unit ( 20 ) comprises a plurality of detector units ( 22 ) for the detection of a plurality of return signals ( 21 ).
14 . The measuring system ( 1 ) according to one of the preceding claims, wherein the measuring system ( 1 ) is a LIDAR system.
15 . The measuring system ( 1 ) according to one of the preceding claims, including a storage capacitor ( 18 ) and a current control unit ( 16 ), wherein
the at least one LED lighting unit ( 12 ) is connected in a strand in series to the current control unit ( 16 ), and
the storage capacitor ( 18 ) is connected in parallel to the strand having the at least one LED lighting unit ( 12 ) and the current control unit ( 16 ), wherein
the current control unit ( 16 ) is configured to set a current for operating the at least one LED lighting unit ( 12 ) in such a way that the at least one LED lighting unit ( 12 ) is operated with a direct current in a first operating state of the current control unit ( 16 ) and with a pulsed current in a second operating state of the current control unit ( 16 ).
16 . The measuring system ( 1 ) according to one of the preceding claims, wherein
the sender unit ( 10 ) comprises multiple clusters ( 15 ) each including a plurality of LED lighting units ( 12 ), wherein
the LED lighting units ( 12 ), per cluster, emit in a same solid angle range, and
the LED lighting units ( 12 ) of different clusters ( 15 ) each emit in different solid angle ranges.
17 . The measuring system ( 1 ) according to one of the preceding claims, wherein one strand having one current control unit ( 16 ) is provided per cluster ( 15 ), which current control unit ( 16 ) is in each case connected in series with the LED lighting units ( 12 ) of the cluster ( 15 ) and configured to set the current for operating the LED lighting units ( 12 ) of the cluster ( 15 ).
18 . Use of at least one individually operable LED lighting unit ( 12 ) as a sender unit ( 10 ) in a measuring system ( 1 ), wherein the LED lighting unit ( 12 ) has a luminous area ( 106 ) with a characteristic longitudinal extent ( 107 ) of less than or equal to 100 μm and/or a luminous area ( 106 ) of less than or equal to 10 4 μm 2 and is configured to emit at least one light pulse as a sender signal ( 11 ) during operation.
19 . A method for operating a measuring system) according to one of claims 1 to 17 , in which
the sender unit ( 10 ) emits at least one light pulse as a sender signal ( 11 ), and
the receiver unit ( 20 ) detects the return signal ( 21 ).
20 . Lighting source ( 2 ) with a measuring system ( 1 ) according to one of claims 1 to 17 , wherein the sender unit ( 10 ) comprises at least two operating states, one operating state of which is configured for performing the method according to claim 19 , and a different operating state is configured to continuously emit light for ambient lighting.