PosEye®
PosEye® measures the direction of its lines of sight to visible pre-determined reference points. These points may be passive e.g. reflecting tape, or active e.g. diodes. If passive reflective tape reference points are used infrared light is emitted by the PosEye® measurement unit. With knowledge of the position of the reference points, in an appropriate coordinate system, PosEye® is able to calculate its own absolute position, in six degrees of freedom (6DOF) - x, y, z and three direction coordinates, to a very high accuracy.
• head, hand and object tracking system for Augmented and Virtual Reality studios.
• handheld joystick, for example, in order to manually control a robot and move it to a particular spot.
• position sensor mounted on a robot in the vicinity of its work point.
• sensor for fixture control.
When the technology is used as joystick to control a robot; the robot performs movements identical in relation to the operator's hand movements. This gives a complete concomitance in a way that is intuitively correct for the operator.
The system can operate wireless and can be designed to operate as a joystick without a platform. When it is used as position sensor on a robot; it gives the robot's pose (position and orientation) in a desired coordinate system, e.g. the workshop coordinate system, independent of the robot.
The robot mounted system looks like a small cupola and has the size of a small coffee-cup. The system used for quality assurance in a fixture control, provides a number of quantifiable advantages, like automatic control during production, control of distance, non contact control and dynamic eligible accuracy.
The system measures its own absolute position in relation to a number of reference points, without drifting, and after the first, simple, commissioning, the system defines its exact position directly at power on. The PosEye® reference points can be reflected, moved or be hidden without disturbing the result. The system knows its own and its references' correct position and thereby eliminates incorrect references and can alert the supervising system.
PosEye® can use several groups of reference points concurrently, which is important for concurrent work against an AGV* during movement and against permanent pallets.
PosEye® can easily be given increased accuracy on a special place by placing the reference points closer to that place, and it is very easy to add or remove reference points.
PosEye® can measure its position with an accuracy of 0,1 mm and measure its orientation with an accuracy of 0,1 millirad. PosEye® can work with 100 Hz and a delay of 30 milliseconds or better.
PosEye® is an electro-optical (IR) sensor system that measures its own absolute position and orientation in relation to one or more groups of active or passive references.
PosEye®
is not sensitive to disturbances such as passing items, reflections, mirror
references, etc.
PosEye® works in tough environments e.g. in workshops.
PosEye® calibrates itself by measuring the reference points' coordinates and directions.
PosEye® has no drift, uses low cost references, and several PosEye systems can use the same references.
PosEye® has high redundancy (the system alerts if some reference has been moved).
The work area and the accuracy can easily be increased.
* Automatic Guided Vehicle, “carrier”, self moving
(mounting-) platform.
PosEye® is protected by a number of patents and a registered or applied for trademark in most leading markets.
Does your robot really
know where it is?
Article
in Industrial Robot.
(ISSN: 0143-991X, Year: Oct 2002 Volume: 29 Issue: 5 Page: 407 - 411).
