Tactile bumper for a mobile robot or platform

• US 4,596,412 A
• Filed: 02/21/1985
• Issued: 06/24/1986
• Est. Priority Date: 02/21/1985
• Status: Expired due to Fees

• Current Assignee: The United States of America As Represented By The Secretary of Agriculture
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Everett, Hobart R., Wright, Catherine S.
• Primary Examiner(s): Paperner, Leslie J.
• Assistant Examiner(s): Dayoan, D. Glenn
• Application Number:
  US06/703,848
• Time in Patent Office: 488 Days
• Field of Search: 180/274, 293/126, 293/127, 293/149, 293/151, 293/152, 293/153, 293/154, 293/155, 293/4, 414/5, 901/1, 901/49, 200/61.44, 200/86.5, 200/86 R, 200/85 R, 200/52 R
• US Class Current: 293/4
• CPC Class Codes: B60R 19/42 extending primarily along the sides of, or completely encircling, a vehicle ornamental or guard strips B60R13/04

Abstract

A tactile bumper is configured to obtain sensory information for impact dction and collision avoidance from the entire perimeter of an associated autonomous mobile robot or platform. The tactile bumper comprises a plurality of free-floating strips encased in a housing and is disposed in a spring-loaded fashion so as to normally be in an extended position. A plurality of microswitches are affixed to the housing and are arranged behind the plurality of free-floating strips in such a fashion so as to be activated by any displacement thereof. The most significant component(s) of the tactile bumper are a plurality of free-floating corner pieces, each of which is configured with an angled cut at its ends so as to mate with complementary angled cuts of juxtaposed ones of the plurality of free-floating strips. Thus, when a free-floating corner piece comes into contact with another surface, it will press against the juxtaposed free-floating strip(s), aforementioned, causing it, in turn, to activate the microswitch nearest to the free-floating corner piece.

Claims

1. A tactile bumper for obtaining sensory information, for impact detection and collision avoidance, from the entire perimeter of an associated autonomous mobile robot or platform, comprising:

a housing;

a plurality of free-floating strips encased in said housing, and being disposed therein in a spring-loaded fashion so as to normally be in an extended position;

a plurality of microswitches affixed to said housing, and each being arranged behind portions of corresponding ones of said plurality of free-floating strips in such a fashion so that any displacement thereof will cause activation of the one of said plurality of microswitches nearest to the point of displacement; and

a plurality of free-floating corner pieces, each being configured with angled cuts at ends thereof so as to mate with complementary angled cuts in ends of juxtaposed ones of said plurality of free-floating strips so that any displacement of any one of said plurality of free-floating corner pieces will cause it to press against one of said juxtaposed ones of said plurality of free-float strips, causing it, in turn, to activate the one of said plurality of microswitches nearest to the point of displacement.

2. The tactile bumper of claim 1 wherein said housing includes a plurality of encasings.

3. The tactile bumper of claim 2 wherein said plurality of free-floating strips are slidably fitted into corresponding ones of said plurality of encasings.

4. The tactile bumper of claim 2 wherein said housing further includes a plurality of support brackets each being configured to join and support juxtaposed ones of said plurality of encasings at the ends thereof.

5. The tactile bumper of claim 4 wherein said housing further includes a plurality of support plates affixed near the ends of corresponding ones of said plurality of encasings for support thereof, and for the mounting of corresponding ones of said plurality of microswitches.

6. The tactile bumper of claim 5 wherein on each of the longer ones of said plurality of encasings, an additional one of said plurality of support plates is affixed near the middle thereof for added support and for mounting of an additional one of said plurality of microswitches.

7. The tactile bumper of claim 6 wherein each of said plurality of microswitches includes a microswitch actuator which protrudes through associated ones of said plurality of support plates and said plurality of encasings so that each one of said plurality of microswitches is activated by its microswitch actuator when said corresponding ones of said plurality of free-floating strips are displaced.

8. The tactile bumper of claim 7 further including a plurality of extension springs, each one thereof being affixed to each corresponding one of said plurality of support plates so as to protrude through an associated one of said plurality of encasings, and so that when each of said corresponding ones of said plurality of free-floating strips are displaced, it is then returned to its extended position by the one of said plurality of extension springs nearest the point of displacement.

9. The tactile bumper of claim 8 wherein the angle of the angled cuts are chosen to permit lateral motion of said plurality of free-floating strips and said free-floating corner pieces within associated ones of said plurality of encasings of said housing when responding to oblique impacts.