| 摘要 |
The invention relates to a sensor yarn (10) having a thread core (11), around which a first conductor (12) and a second conductor (13) are helically wound. The two conductors (12, 13) are electrically insulated from each other and from the thread core (11). The two conductors (12, 13) form a capacitive component (15) together with the thread core (11). In a first sensor yarn (10a), the capacitance (Cl) per unit of length changes in the direction of extension (E) of the sensor yarn. This can be accomplished by a change in the winding geometry of the first conductor (12) or of the second conductor (13) or by a change of the permittivity (ε) of the sensor yarn (10). A second sensor yarn (10b) has photosensitive material (30), so the length thereof can be modified by incident light (L). As a result of a change in length or another deformation of the sensor yarn (10a, 10b), the total capacitance (CG) of the sensor yarn (10a, 10b) changes, which can be determined by means of an evaluation unit (17). |
