摘要:
A hydraulic pressure control device is provided that that controls hydraulic pressure of a clutch supplying torque to a continuously variable transmission while the vehicle is stopped and in a running range. The hydraulic pressure control device has an control section that estimates a clutch engagement hydraulic pressure for the clutch based on initially rotational movement of a primary pulley of the continuously variable transmission, and then controls regulation of the hydraulic pressure to the clutch to a designated pressure that is no greater than the clutch engagement hydraulic pressure, when the vehicle is stopped and in the running range, so that the torque from the engine does not rotate a secondary pulley of the continuously variable transmission.
摘要:
A wireless distance measurement system and wireless terminal improve the accuracy of distance measurement when the UWB communication scheme is used. In wireless terminal 200, a route of signals varies between a distance measuring operation and a synchronization establishing operation, and, when the distance measuring operation is performed, a detection result is inputted to comparator 208 without passing through integrator 204. By this means, the distance measuring operation of wireless terminal 200 does not involve integration processing, so that delay time due to integration processing is not produced and, consequently, it is possible to improve the accuracy of distance measurement. Further, the distance measuring operation uses the integration result acquired integrator 204 for a comparison reference voltage used in comparator 208. By this means, the integration result removing noise signal components from a detection signal is used for the comparison reference voltage, so that the comparison reference voltage is optimized. Consequently, it is possible to further improve the accuracy of distance measurement.
摘要:
A wireless distance measurement system and a wireless distance measurement method that measure the distance between a base station and a terminal without clock synchronization between a plurality of base stations, and without requiring input of the position relationships between a plurality of base stations. Clock phase shift section (210) shifts a clock that is used to generate transmission pulses is phase-shifted by a specific amount every 100 nanoseconds, and A/D conversion section (211) converts a signal re-radiated from terminal (103) to a digital signal using the shifted clock. Correlation calculation section (212) performs correlation calculation between the digital signal and the transmission pulse and creates a delay profile by adding digital signals in the shifted phases between same phases, and incoming wave detection section (213) detects peaks of the pulses in the delay profile. Distance calculation section (214) calculates the distance to terminal (103) based on the timings to transmit the pulses and the timings to detect peaks of the pulses.
摘要:
The number of data frames transmitted between two apparatuses is counted by a transmission counter, while the number of received frames is counted by a reception counter. When an OAM frame for frame loss measurement is transmitted, the value of the transmission counter is cached in a cache memory. At the time of generation of an OAM frame at an OAM frame generation unit, the value of the cache memory is used so as to generate an OAM frame carrying the value of the transmission counter at the time of transmission of the OAM frame transmitted previously. The frame loss is calculated from the difference of the value of the transmission counter carried in the OAM frame from the previous value and the difference of the value of the reception counter at the time of reception of the previous previous OAM frame from the previous value.