Vehicle having collision detection device

1. A vehicle comprising:

a vehicle door including an inner door panel and an outer door panel that define a door cavity therebetween, the inner door panel facing an interior of the vehicle and the outer door panel facing an exterior of the vehicle; and

a diaphragm disposed within the door cavity and attached to an inner surface of the outer door panel, the diaphragm cooperating with the inner surface of the outer door panel to define a diaphragm cavity,

wherein the diaphragm includes a main body and a rim, and wherein the rim extends at least partially around a periphery of the main body,

wherein the rim is attached to the inner surface of the outer door panel such that the diaphragm cavity is sealed,

wherein the main body includes a cover member opposite an opening of the main body,

wherein the main body remains in an initial state of rest relative to the vehicle during an impact event, and

wherein the diaphragm cavity decreases in volume and increases in pressure when the main body remain in the initial state of rest relative to the vehicle.

2. The vehicle of claim 1 , wherein a plate is embedded in the cover member of the main body.

3. The vehicle of claim 2 , wherein the outer door panel is configured to be displaced toward the plate and the main body during an impact event.

4. The vehicle of claim 2 , wherein the plate and the main body remain in an initial state of rest relative to the vehicle during an impact event and the outer door panel is configured to be displaced toward the plate and the main body during the impact event.

5. The vehicle of claim 3 , wherein the diaphragm cavity decreases in volume and increases in pressure when the outer door panel is displaced toward the plate and main body.

6. The vehicle of claim 4 , wherein the diaphragm cavity decreases in volume and increases in pressure when the plate and the main body remain in the initial state of rest relative to the vehicle and the outer door panel is displaced toward the plate and the main body.

7. The vehicle of claim 4 , further comprising a pressure sensor disposed within the door cavity and operatively connected to the diaphragm and a control module.

8. The vehicle of claim 7 , wherein the control module is configured to deploy a vehicle airbag when the pressure differential within the diaphragm cavity exceeds a predetermined value.

9. The vehicle of claim 2 , wherein the diaphragm is made of a neoprene material.

10. The vehicle of claim 9 , wherein the plate is made of a metallic or non-metallic material.

11. The vehicle of claim 5 , wherein the increase in pressure within the diaphragm cavity is directly proportional to a rate of the outer door panel displacement.