摘要:
A bearing seal includes: a ring-shaped outer seal portion; a ring-shaped inner seal portion provided inside the outer seal portion; a connecting portion for connecting the inner seal portion and the outer seal portion; and a ring-shaped rigid portion provided at the connecting portion. The outer seal portion, the inner seal portion, and the connecting portion are integrally formed of the same material consisting of an elastic material. The inner seal portion has rigidity higher than that of the outer seal portion, and has a ring-shaped seal surface gradually approaching a ring center axis of the inner seal portion while extending from a ring-shaped base end side connected to the connecting portion toward a distal end side.The inner seal portion is formed in a tapered cylindrical shape having the ring-shaped seal surface on an inner peripheral surface thereof, and has a thickness which gradually decreases from the base end side toward the distal end side. The inner seal portion includes only one inner seal portion.
摘要:
It is an object of the present invention to provide a bearing seal not only whose sealing performance is favorable in normal time, but also whose sealing performance can be prevented from being deteriorated when subjected to vibration caused by impact. A bearing seal includes: a ring-shaped outer seal portion 51; a ring-shaped inner seal portion 52 provided inside the outer seal portion 51; a connecting portion 53 for connecting the inner seal portion 52 and the outer seal portion 51; and an inner ring 60 provided at the connecting portion 53. The outer seal portion 51, the inner seal portion 52, and the connecting portion 53 are integrally formed of the same material consisting of an elastic material. The inner seal portion 52 is formed to have rigidity higher than that of the outer seal portion 51, and has a ring-shaped seal surface 52A gradually approaching a ring center axis of the inner seal portion 52 while extending from a ring-shaped base end side connected to the connecting portion 53 toward a distal end side.
摘要:
An excavation control system includes a working unit, hydraulic cylinders, a prospective speed obtaining part, a speed limit selecting part and a hydraulic cylinder controlling art. The prospective speed part is configured to obtain a first prospective speed depending on a first distance between the bucket and a first designed surface, and a second prospective speed depending on a second distance between the bucket and a second designed surface. The speed limit selecting part is configured to select one of the first and second prospective speeds as a speed limit based on a relative relation between the first designed surface and the bucket and a relative relation between the second designed surface and the bucket. The hydraulic cylinder controlling part is configured to limit a relative speed of the bucket relative to one of the first and second designed surfaces to the speed limit.
摘要:
An optical transmission apparatus communicable with a plurality of subscriber including a delay measuring part for detecting a response delay time from each subscriber based on reception timing of the delay measurement response optical packet, a detection part for detecting a received optical level of the delay measurement response optical packet received by the reception part and a state determination part for determining quality of an optical transmission state between the optical transmission apparatus and each subscriber based on the received optical level of the delay measurement response optical packet of each of the plurality of subscribers.
摘要:
A receiving apparatus comprises a first waveform degradation compensating unit, a second waveform degradation compensating unit, a received waveform measuring unit for measuring waveform data on a received signal, a control unit for controlling compensation characteristics of the first and second waveform degradation compensating units to minimize a difference between frequency data obtained by converting the obtained received waveform data into a frequency domain and frequency data on a reference waveform free from waveform degradation, and time-constant generating units for making a difference in compensation characteristic control speed between the first and second waveform degradation compensating units. This realizes high-accuracy compensation for waveform degradation of a received signal stemming from chromatic dispersion, polarization mode dispersion or the like without employing a dispersion compensation fiber or a polarization maintaining fiber.
摘要:
A burst mode optical transmitter circuit comprises a semiconductor laser, a photodiode for monitoring the light output from the semiconductor laser, a current-voltage converting circuit for converting the current detected by the photodiode into a voltage, an APC amplifier, a holding circuit for holding, as a current control signal, the output signal from the APC amplifier, a driving circuit for supplying a driving current to the semiconductor laser according the current control signal from the holding circuit and the the data input in the burst mode, and a data interruption detecting circuit for detecting an interrupt period of the data input to the driving circuit to reset the holding circuit, in which the current control signal held in the hold circuit is reset by the reset signal, whereby a stable burst optical transmission can be performed stably with a simple construction.
摘要:
An excavation control system includes a working unit, hydraulic cylinders, a prospective speed obtaining part, a relative speed obtaining part, a speed limit selecting part and a hydraulic cylinder controlling part. The prospective speed obtaining part obtains first and second prospective speeds depending on first and second intervals between first and second monitoring points of the bucket and a designed surface, respectively. The relative speed obtaining part obtains first and second relative speeds of the first and second monitoring points relative to the designed surface, respectively. The speed limit selecting part selects one of the first and second prospective speeds as a speed limit based on relative relations between the first and second relative speeds and the first and second prospective speeds, respectively. The hydraulic cylinder controlling part limits a relative speed of one of the first and second monitoring points to the speed limit.
摘要:
An optical communication method includes outputting an optical data signal in which a signal amplitude of a non-data area that is an area other than a data area is made higher than a signal amplitude of the data area, to a predetermined receiver, receiving an optical input including the optical data signal with the predetermined receiver, detecting each of the signal amplitude of the non-data area and the signal amplitude of the data area of the optical input, creating a threshold for encoding the data area based on the signal amplitude of the data area, determining whether the optical data signal is received, based on the signal amplitude of the non-data area, and outputting a data signal in which the data area is encoded by using the threshold of the optical data signal, when it is determined that the optical data signal is received.
摘要:
An excavation control system includes a working unit, hydraulic cylinders, a prospective speed obtaining part, a relative speed obtaining part, a speed limit selecting part and a hydraulic cylinder controlling part. The prospective speed obtaining part obtains first and second prospective speeds depending on first and second intervals between first and second monitoring points of the bucket and a designed surface, respectively. The relative speed obtaining part obtains first and second relative speeds of the first and second monitoring points relative to the designed surface, respectively. The speed limit selecting part selects one of the first and second prospective speeds as a speed limit based on relative relations between the first and second relative speeds and the first and second prospective speeds, respectively. The hydraulic cylinder controlling part limits a relative speed of one of the first and second monitoring points to the speed limit.
摘要:
A power-saving mode flag generating unit 101e sets a power-saving mode flag to active (non power-saving mode, turning on the power-source) when it receives a reset signal from a MAC unit 102. Furthermore, the power-saving mode flag generating unit 101e sets the power-saving mode flag to sleep (power-saving mode, turning off the power source) in accordance with a signal-interrupt detection signal obtained by the signal-interrupt detecting unit 101f1 of the packet monitoring unit 101f. Depending on the state of a packet, the power-saving mode flag generating unit 101e changes the power-saving mode flag to active or sleep for the data communication area of the packet; however, for the ranging area of the packet, the power-saving mode flag generating unit 101e always sets the power-saving mode flag to active. A pattern discriminating unit 101g discriminates between the data communication area and the ranging area of the packet.