Abstract: An individual tension meter (1) for measuring tension in a racquet string (9), includes a graspable body (10) and a stress member (2) for stressing the string (9) that are movable relative to each other by pivoting, elastically deformable return elements (3) configured to urge the graspable body (10) and the stress member (2) relative to each other back into a neutral angular position, measurement elements for measuring a magnitude representative of the relative pivoting between the graspable body (10) and the stress member (2), and computation elements for computing the tension of the string as a function of the measured magnitude. The graspable body (10) and the stress member (2) have a first possibility of pivoting relative to each other in a first direction and a second possibility of pivoting relative to each other in a second direction opposite from the first direction.

Abstract: A capacitance type sensor good in operability and less in erroneous operation is provided. Switches SW1 to SW4 are formed between a displacement electrode 40 and switch electrodes E11 to E14 kept at a predetermined potential and grounded switch electrodes E15 to E18. Switches SW 11 to SW 15 are connected to respective capacitance electrodes E1 to E5 that cooperate with the displacement electrode 40 to form capacitance elements. A decision circuit judges states of the switches SW1 to SW4. When at least one of the switches SW1 to SW4 is off, periodic signals are input only to the capacitance electrodes E1 to E4 corresponding to X- and Y-axial directions. When any of the switches SW1 to SW4 is on, a periodic signal is input only to the capacitance electrode E5 corresponding to a Z-axial direction.

Abstract: The invention provides a force detector in which power consumption is suppressed. Four electrodes E11 through E14 are formed on a substrate, and an elastic deformable body formed of a rubber film is disposed thereon. A conductive coating is applied on the lower surface of the elastic deformable body to provide a displacing conductive layer 26. Four capacitance elements C11 through C14 are comprised by the electrodes E11 through E14 and the displacing conductive layer 26 opposed to the electrodes. The capacitance values thereof are converted into voltage values V11 through V14 by C/V converter circuit 50, and based on operation by signal processing circuit 60, an external force applied to the elastic deformable body is detected.

Abstract: The invention provides a force detector in which power consumption is suppressed. Four electrodes E11 through E14 are formed on a substrate, and an elastic deformable body formed of a rubber film is disposed thereon. A conductive coating is applied on the lower surface of the elastic deformable body to provide a displacing conductive layer 26. Four capacitance elements C11 through C14 are comprised by the electrodes E11 through E14 and the displacing conductive layer 26 opposed to the electrodes. The capacitance values thereof are converted into voltage values V11 through V14 by C/V converter circuit 50, and based on operation by signal processing circuit 60, an external force applied to the elastic deformable body is detected.

Abstract: The invention comprises a fixed platform (1) and a displaceable platform (2) that are coupled by six tension springs (3) and an elastic spacer member (6). The spacer member forms with each platform, for instance, a ball-and-socket joint, such that the platforms can be displaced in a total of five to six degrees of freedom in respect to each other. The displacement is detected by measurements at the tension springs (3) or at the spacing member (6). This is preferably done by measuring the inductivity of the tension springs (3), thereby making it possible to easily determine the relative position of the platforms.