17-03-2014, 08:01 PM
ABSTRACT
In this study, we propose a three-dimensional interface using a
wire. This interface obtains a three-dimensional position by the
length and direction of the wire. The length of the wire is
measured by a rotary encoder, and the direction of the wire is
measured by two linear image sensors that do not come into
contact with the wire. An analog signal from the linear image
sensor is sent to a PC through an analog comparator. The threedimensional
position of the wire tip can be obtained by these
devices at high speed and low cost.
Keywords: Single wire, linear image sensor.
Index Terms: I.3.1 [COMPUTER GRAPHICS]: Hardware
Architecture—Input devices
1 INTRODUCTION
Space interface device for artificial reality (SPIDAR) [1] can
relatively quickly acquire the position of the end effector
relatively because the mass of the mechanism for position
acquisition, such as wires and other mechanical equipments, is
light. On the other hand, when the wire is in contact with an
operator’s hands or fingers during operation, the accuracy of
SPIDAR’s position acquisition is reduced. Furthermore, when we
construct a two-hand manipulation environment, two SPIDARs
are often put in the same work space. When wires are brought into
contact with each other, position acquisition accuracy is also
reduced. To accurately obtain the position of the end effector, it is
necessary to place wires away from each other. Therefore, to
avoid wire contact, we must consider reducing the number of
wires used.
We have developed an interface that measures the wire length and
feed direction to determine the three-dimensional position of the
wire tip. The length of the wire is measured by a rotary encoder,
and the feed direction of the wire is obtained by two linear image
sensors. Because the output of the linear image sensors is
processed by an analog comparator, this interface can obtain the
wire feed direction at high speed and low cost.
In this study, we propose a three-dimensional interface using a
wire. This interface obtains a three-dimensional position by the
length and direction of the wire. The length of the wire is
measured by a rotary encoder, and the direction of the wire is
measured by two linear image sensors that do not come into
contact with the wire. An analog signal from the linear image
sensor is sent to a PC through an analog comparator. The threedimensional
position of the wire tip can be obtained by these
devices at high speed and low cost.
Keywords: Single wire, linear image sensor.
Index Terms: I.3.1 [COMPUTER GRAPHICS]: Hardware
Architecture—Input devices
1 INTRODUCTION
Space interface device for artificial reality (SPIDAR) [1] can
relatively quickly acquire the position of the end effector
relatively because the mass of the mechanism for position
acquisition, such as wires and other mechanical equipments, is
light. On the other hand, when the wire is in contact with an
operator’s hands or fingers during operation, the accuracy of
SPIDAR’s position acquisition is reduced. Furthermore, when we
construct a two-hand manipulation environment, two SPIDARs
are often put in the same work space. When wires are brought into
contact with each other, position acquisition accuracy is also
reduced. To accurately obtain the position of the end effector, it is
necessary to place wires away from each other. Therefore, to
avoid wire contact, we must consider reducing the number of
wires used.
We have developed an interface that measures the wire length and
feed direction to determine the three-dimensional position of the
wire tip. The length of the wire is measured by a rotary encoder,
and the feed direction of the wire is obtained by two linear image
sensors. Because the output of the linear image sensors is
processed by an analog comparator, this interface can obtain the
wire feed direction at high speed and low cost.