Things That the Cane May Not Detect: Poles or Corners

The cane may go around poles and corners without contacting them. However if the pole or corner is close enough to the cane hand, the shaft of the cane will contact it. This means that the parts of the body that are behind or above the cane hand are protected -- people will be warned if they are about to walk into a pole or corner that will impact their body near the cane hand (click here for a drawing of the cane and pole).

In this first example, the woman is approaching a pole such that if the cane doesn't contact it, she will impact it at her left shoulder, which is not near her cane hand:

series of photos shows a woman walking toward a pole with a cane in her right hand. the cane tip starts on the woman's left, misses the pole as it moves to the woman's right, and when it reaches left again the entire cane is beyond the pole and the woman bumps into the pole with her left shoulder. series of photos shows a woman walking toward a pole with a cane in her right hand. the cane tip starts on the woman's left, misses the pole as it moves to the woman's right, and when it reaches left again the entire cane is beyond the pole and the woman bumps into the pole with her left shoulder. series of photos shows a woman walking toward a pole with a cane in her right hand. the cane tip starts on the woman's left, misses the pole as it moves to the woman's right, and when it reaches left again the entire cane is beyond the pole and the woman bumps into the pole with her left shoulder. series of photos shows a woman walking toward a pole with a cane in her right hand. the cane tip starts on the woman's left, misses the pole as it moves to the woman's right, and when it reaches left again the entire cane is beyond the pole and the woman bumps into the pole with her left shoulder. series of photos shows a woman walking toward a pole with a cane in her right hand. the cane tip starts on the woman's left, misses the pole as it moves to the woman's right, and when it reaches left again the entire cane is beyond the pole and the woman bumps into the pole with her left shoulder. series of photos shows a woman walking toward a pole with a cane in her right hand. the cane tip starts on the woman's left, misses the pole as it moves to the woman's right, and when it reaches left again the entire cane is beyond the pole and the woman bumps into the pole with her left shoulder.

Area of coverage, and effect of centering the hand
In the illustration below, the cane goes around pole again, but this time the woman is walking more directly to the pole (such that if the cane does not detect it, she will bump into the pole with her head, rather than her shoulder).
The tip of the cane still misses the pole but in the last photo, the shaft of the cane contacts the pole and warns the woman of its presence, illustrating that people are protected from bumping unaware into poles/corners that are approached near the hand.
If the hand is centered, this area of protection includes the face, but if the hand is held at the side, this area of protection includes the hip and shoulder -- the head is unprotected.

Series of photos shows a woman approaching a pole, holding a cane in her right hand which is centered in front of her. The cane tip starts out on the woman's left and as she moves forward, the tip moves to the woman's right, barely missing the pole and reaches to the right of the pole. When the tip is moved back to the left, the shaft of the cane contacts the pole. Series of photos shows a woman approaching a pole, holding a cane in her right hand which is centered in front of her. The cane tip starts out on the woman's left and as she moves forward, the tip moves to the woman's right, barely missing the pole and reaches to the right of the pole. When the tip is moved back to the left, the shaft of the cane contacts the pole. Series of photos shows a woman approaching a pole, holding a cane in her right hand which is centered in front of her. The cane tip starts out on the woman's left and as she moves forward, the tip moves to the woman's right, barely missing the pole and reaches to the right of the pole. When the tip is moved back to the left, the shaft of the cane contacts the pole. Series of photos shows a woman approaching a pole, holding a cane in her right hand which is centered in front of her. The cane tip starts out on the woman's left and as she moves forward, the tip moves to the woman's right, barely missing the pole and reaches to the right of the pole. When the tip is moved back to the left, the shaft of the cane contacts the pole. Series of photos shows a woman approaching a pole, holding a cane in her right hand which is centered in front of her. The cane tip starts out on the woman's left and as she moves forward, the tip moves to the woman's right, barely missing the pole and reaches to the right of the pole. When the tip is moved back to the left, the shaft of the cane contacts the pole.

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