Abstract: A vibration distribution measurement system includes a frequency sweep light source that outputs frequency sweep light, an optical splitter that splits the frequency sweep light into probe light and local light, an optical mixer that mixes backscattered light from the sensing fiber as signal light with the local light, the backscattered light being obtained by causing the probe light to be incident on the sensing fiber, and an analysis unit that analyzes a beat signal obtained from output light of the optical mixer. The analysis unit estimates a distance offset from a measurement result obtained by measuring a distribution waveform of the signal light by measuring the beat signal at a measurement time sufficiently shorter than a cycle of the vibration of the sensing fiber, and measures a distribution of a vibration at any position by compensating for the distance offset.

Abstract: According to a torque detecting method, gravitational torque applied to a rotary shaft of an arm is detected in a condition where position control of the arm is stopped, when the arm is located at a first position at which the arm is oriented in a direction different from a direction of gravitational force. Then, a gravity coefficient used for calculating gravitational torque corresponding to a position of the arm is calculated, based on the gravitational torque and the first position. Then, gravitational torque during position control is calculated, based on the position of the arm detected during the position control, and the gravity coefficient. Further, an actual output torque during the position control is calculated, based on operating torque applied to the rotary shaft and detected during the position control, and the gravitational torque calculated during the position control.

Abstract: According to a torque detecting method, gravitational torque applied to a rotary shaft of an arm is detected in a condition where position control of the arm is stopped, when the arm is located at a first position at which the arm is oriented in a direction different from a direction of gravitational force. Then, a gravity coefficient used for calculating gravitational torque corresponding to a position of the arm is calculated, based on the gravitational torque and the first position. Then, gravitational torque during position control is calculated, based on the position of the arm detected during the position control, and the gravity coefficient. Further, an actual output torque during the position control is calculated, based on operating torque applied to the rotary shaft and detected during the position control, and the gravitational torque calculated during the position control.

Abstract: A content recording/reproducing apparatus capable of reproducing a content in accordance with the scheduled viewing time of a user without any interruption in the middle. A recording/reproducing apparatus (1) records reproduction time information indicating time required for the reproduction of each content to be accumulated in a accumulating portion (15) and records a content to be partially viewed out of the contents accumulated in the accumulating portion (15) and a part to be viewed out of the content as partial viewing information (for example, information unviewed or to be reviewed) on the accumulating portion (15). A time specifying portion (11) allows the user to set viewing time indicating the desired number of hours to view the content.