System, device, and method for monitoring and controlling the position of a remote object
First Claim
Patent Images
1. A device comprising:
- a processor and a memory;
a laser emitter communicatively coupled to the processor and configured to emit a laser beam at a remote object comprising at least one retroreflective portion;
a photosensor communicatively coupled to the processor,wherein the memory comprises instructions encoded on non-transitory media that when executed by the processor, cause the device to detect whether the remote object has changed its position, the instructions comprising;
detecting a first light intensity measurement through the photosensor;
toggling a power state of the laser emitter;
detecting a second light intensity measurement through the photosensor; and
detecting a threshold difference between the first light intensity measurement and the second light intensity measurement.
1 Assignment
0 Petitions
Accused Products
Abstract
Various controllers herein detect a remote object'"'"'s change of position. A controller emits a laser through a laser emitter at the remote object and measures an intensity of light reflected back to the controller through a photosensor disposed in proximity to the laser emitter. The surface of the remote object comprises a retroreflective portion, which reflects most of the laser beam'"'"'s light in the direction it came from. A change in the remote object'"'"'s position is detected when the intensity of light measured is substantially different after altering a factor of the laser emitter, such as power state.
-
Citations
3 Claims
-
1. A device comprising:
-
a processor and a memory; a laser emitter communicatively coupled to the processor and configured to emit a laser beam at a remote object comprising at least one retroreflective portion; a photosensor communicatively coupled to the processor, wherein the memory comprises instructions encoded on non-transitory media that when executed by the processor, cause the device to detect whether the remote object has changed its position, the instructions comprising; detecting a first light intensity measurement through the photosensor; toggling a power state of the laser emitter; detecting a second light intensity measurement through the photosensor; and detecting a threshold difference between the first light intensity measurement and the second light intensity measurement.
-
-
2. A computer-implemented method comprising:
-
detecting, through a processor of a device communicatively coupled to a photosensor and a laser emitter, a first light intensity measurement through the photosensor, wherein the laser emitter is configured to emit a laser beam at a retroreflective portion of a remote object; toggling a power state of the laser emitter; detecting a second light intensity measurement through the photosensor; and detecting a threshold difference between the first light intensity measurement and the second light intensity measurement.
-
-
3. A system comprising:
a controller comprising; a processor; a memory; a laser emitter communicatively coupled to the processor and configured to emit a laser beam at a retroreflective portion of a remote object; a photosensor communicatively coupled to the processor wherein the memory comprises instructions encoded on non-transitory media that, when executed by the processor, cause the controller to detect whether the remote object has changed its position, the instructions comprising; detecting a first light intensity measurement through the photosensor; toggling a power state of the laser emitter; detecting a second light intensity measurement through the photosensor; determining whether the remote object is in the predetermined position based on detecting a threshold difference between the first light intensity measurement and the second light intensity measurement.
Specification