摘要:
An optical fiber sensor can be interposed between a bumper reinforcement and a load transmitting plate to extend in the direction of width of a vehicle along with the bumper reinforcement. In this case, when a change does not occur substantially in an immediately previous predetermined period in an output voltage of a light emission amount of the optical fiber sensor, a feedback control is performed in such a way that the change becomes a level of zero of the output voltage of the optical fiber sensor. In contrast, when a change in the output voltage is not substantially zero, the immediately previous state of emission of light is maintained. Accordingly, it is possible to effectively compensate a zero point shift caused by a temperature change or/and an aging degradation of the optical fiber sensor.
摘要:
An optical fiber sensor in which the insertion efficiency of a plastic fiber is improved, the potential danger of rupture of a mold member is decreased, the operation of the sensor in a low load area and the linearity of output of the sensor are improved. Plastic fiber for detection is inserted in insertion hole of molded member, and filler is filled in a gap between the plastic fiber for detection and the molded member.
摘要:
An optical fiber sensor can be interposed between a bumper reinforcement and a load transmitting plate to extend in the direction of width of a vehicle along with the bumper reinforcement. In this case, when a change does not occur substantially in an immediately previous predetermined period in an output voltage of a light emission amount of the optical fiber sensor, a feedback control is performed in such a way that the change becomes a level of zero of the output voltage of the optical fiber sensor. In contrast, when a change in the output voltage is not substantially zero, the immediately previous state of emission of light is maintained. Accordingly, it is possible to effectively compensate a zero point shift caused by a temperature change or/and an aging degradation of the optical fiber sensor.
摘要:
An optical fiber sensor in which the insertion efficiency of a plastic fiber is improved, the potential danger of rupture of a mold member is decreased, the operation of the sensor in a low load area and the linearity of output of the sensor are improved. Plastic fiber for detection is inserted in insertion hole of molded member, and filler is filled in a gap between the plastic fiber for detection and the molded member.
摘要:
A shock detection optical fiber sensor includes: a plastic fiber; a corrugated plate having a plurality of protrusions arranged in the longitudinal direction of the plastic optical fiber and formed to oppose to the plastic optical fiber; a mold plate covering the plastic optical fiber and the corrugated plate; a light emitting element connected to one end of the plastic optical fiber; and a light receiving element connected to the other end of the plastic optical fiber.
摘要:
In a vehicle bumper structure, an optical fiber sensor (32) is provided in a vehicle width direction on the front surface of a front-bumper reinforcement (30). A front-bumper absorber (28) is provided in front of the optical fiber sensor (32), the front-bumper absorber (28) formed of a soft absorber (54) and a hard absorber (56). The hard absorber is disposed at the bumper center region where the thickness of the bumper is increased. Accordingly, the thickness of the soft absorber (54) becomes substantially uniform in the vehicle width direction, so that a substantially uniform load is inputted to the optical fiber sensor (32) regardless of the collision position of the bumper with an object. As a result, variations in the output of the load-sensing unit are reduced.
摘要:
A collision detection sensor for detecting a collision of a vehicle and a collision object by converting the collision into a change in optical transmission characteristics of an optical fiber. The collision detection sensor has the optical fiber, a molding material formed on the periphery of the optical fiber, and a convex portion formed on the surface of the molding material.
摘要:
A collision detection sensor for detecting a collision of a vehicle and a collision object by converting the collision into a change in optical transmission characteristics of an optical fiber. The collision detection sensor has the optical fiber, a molding material formed on the periphery of the optical fiber, and a convex portion formed on the surface of the molding material.
摘要:
A method for fabricating an optical fiber impulse sensor having an optical fiber and a molded portion molded around the perimeter of the optical fiber. The method forms, in the molded portion, an optical fiber insertion hole and an optical fiber insertion slit for inserting the optical fiber into the optical fiber insertion hole. The method inserts the optical fiber from the slit into the optical fiber insertion hole.
摘要:
An optical fiber 1 includes a core 11 and a cladding material 12. In a collision detection optical fiber sensor 100, a plurality of linear members 2 and 3 are twisted around an outer periphery of the cladding material 12 of the optical fiber 1. An elastic member 6 of the liner member 2 has an elasticity different from that of an elastic member 7 of the first linear member 3. The hardness of the elastic member 6 is lower than that of the elastic member 7. A rubber hardness difference measured by a durometer type A according to a JIS K6253 between the elastic member 6 and the elastic member 7 is not less than 10.