Collision sensing and energy absorbing apparatus

1. An apparatus comprising:

an enclosed body defining a chamber therein, the body including a rearward portion, a forward portion opposite the rearward portion and a first portion extending between the rearward and forward portions, the first portion having a stiffness less than at least one remaining portion of the body; and

at least one pressure sensor coupled to the body and the chamber to detect deformation of the first portion of the body.

2. The apparatus of claim 1 , wherein the first portion includes at least one of a variation in size, thickness, shape and material composition from the at least one remaining portion of the body.

3. The apparatus of claim 2 , wherein the body includes a second portion extending between the rearward and forward portions, the first and second portions being arranged in series between the rearward and forward portions, the first portion having a stiffness less than the second portion.

4. The apparatus of claim 3 , wherein the first portion has a thickness less than the second portion.

5. The apparatus of claim 3 , wherein the first and second portions are partially offset from one another.

6. The apparatus of claim 5 , wherein the first and second portions are arranged in a corrugated configuration.

7. The apparatus of claim 5 , wherein the first and second portions are arranged in a ribbed configuration.

8. The apparatus of claim 1 , wherein the rearward and forward portions of the body vary in height along the width of the body.

9. The apparatus of claim 1 , further comprising a first pressure sensor coupled to a first sidewall of the body, and a second pressure sensor coupled to a second sidewall of the body, the first and second sidewalls being coupled at opposing ends of the body along the width thereof.

10. An assembly comprising:

a bumper beam for a vehicle;

an enclosed body defining a chamber therein, the body including a rearward portion engaged with the bumper beam, a forward portion opposite the rearward portion and a first portion extending between the rear and forward portions, the first portion having a stiffness less than at least one remaining portion of the body, the at least one remaining portion of the body having a stiffness less than the bumper beam; and

at least one pressure sensor coupled to the body and in communication with the chamber, the at least one pressure sensor detecting deformation of the first portion of the body.

11. The assembly of claim 10 , wherein the first portion includes at least one of a variation in size, thickness, shape and material composition from the at least one remaining portion of the body.

12. The assembly of claim 11 , wherein the body includes a second portion extending between the rearward and forward portions, the first and second portions being arranged in series between the rearward and forward portions, the first portion having a stiffness less than the second portion.

13. The assembly of claim 12 , wherein the first portion has a thickness less than the second portion.

14. The assembly of claim 12 , wherein the first and second portions are partially offset from one another.

15. The assembly of claim 14 , wherein the first and second portions are arranged in a corrugated configuration.

16. The assembly of claim 14 , wherein the first and second portions are arranged in a ribbed configuration.

17. The assembly of claim 10 , wherein the rearward and forward portions of the body vary in height along the width of the body.

18. The assembly of claim 10 , further comprising a first pressure sensor coupled to a first sidewall of the body, and a second pressure sensor coupled to a second sidewall of the body, the first and second sidewalls being coupled at opposing ends of the body along the width thereof.