Patent ID: 8348304

Claim:
An airbag jacket activating system comprising: radio communications means configured to make radio communications between a vehicle and an airbag jacket; acceleration detecting means configured to detect acceleration of the vehicle; on-vehicle control means configured to transmit deployment instruction data on the airbag jacket to the airbag jacket through the radio communications means in a case were the acceleration detected by the acceleration detecting means exceeds a predetermined value; and in-jacket control means configured to deploy the airbag jacket when receiving the deployment instruction data transmitted from the on-vehicle control means; wherein the radio communications means comprises: high-frequency radio communications means configured to make radio communications by use of a high-frequency band; and low-frequency radio communications means configured to make radio communications by use of a low-frequency band; the vehicle further comprises: on-vehicle storage means configured to store a high-frequency ID and a low-frequency ID; and on-vehicle update means configured to update the low-frequency ID at a predetermined timing, to code the updated low-frequency ID together with the high-frequency ID, and to transmit the coded updated low-frequency ID and the coded high-frequency ID to the airbag jacket through the high-frequency radio communications means; the airbag jacket further comprises: in-jacket storage means configured to store the high-frequency ID and the low-frequency ID; and in-jacket update means configured to collate the high-frequency ID transmitted from the on-vehicle update means with the high-frequency ID stored in the in-jacket storage means, and to store the updated low-frequency ID in the in-jacket storage means when receiving the updated low-frequency ID together with the high-frequency ID whose collation succeeds; when the acceleration detected by the acceleration detecting means exceeds a predetermined value, the on-vehicle control means causes the coded high-frequency ID and the deployment instruction data to be transmitted through the high-frequency radio communications means, and causes the low-frequency ID and the deployment instruction data to be transmitted through the low-frequency radio communications means; and the in-jacket control means receives the deployment instruction data which is transmitted together with any one of the high-frequency ID and the low-frequency ID, and thus deploys the airbag jacket.