摘要:
A light source supplies optical signal to an optical switch and a detector detects light receiving level. A control unit changes a deflection control amount for changing an angle of a tilt mirror, and outputs the deflection control amount to a driving unit. When an input and an output ports are same, optical offset of the tilt mirror is calculated based on optimal angle at which the light detector detects an optimal point of the light receiving level. Whenever the input and the output port are different, a structure parameter of the tilt mirror is calculated based on the optical offset and the optimal angle. The optical offset and the structure parameter are stored in a memory as a test result.
摘要:
In order to allow bit-interleaved-parity calculation to be easily performed while maintaining compatibility with an existing system during transmission of data having mixed bit rates, header information of a first bit rate is added to data of the first bit rate and data of a second bit rate, time-division multiplexing is performed on the header-information-added data signals to generate a data string and a frame header is added thereto to generate a frame signal, parities of the frame signal that is sequentially generated are determined, parity bits for parity checking for the data signals of the first bit rate and the data signals of the second bit rate are inserted into the frame signal, based on a result of the parity calculation.
摘要:
A polarization independent optical isolator includes: a first birefringent plate that divides the receiver light from the optical transmission path into normal light and abnormal light to output the normal light and the abnormal light; a second birefringent plate that combines the normal light and the abnormal light to output the combined light to the light receiving element; an optical rotation unit that is disposed between the first birefringent plate and the second birefringent plate, rotates the polarization direction of the normal light and the abnormal light which are outputted from the first birefringent plate by substantially 90° and outputs the rotated light, and outputs the reflected light of the receiver light in a state where the polarization direction of the reflected light is not rotated; and a polarizing element that is disposed between the optical rotation unit and the second birefringent plate, allows one of the normal light and the abnormal light which are inputted from the optical rotation unit to pass therethrough and to be inputted to the second birefringent plate, and outputs the transmitter light inputted from the light emitting element to the optical rotation unit.
摘要:
The present invention is a wavelength superimposing device that can restrain a system scale and further reduce an optical transmission loss, while broadcasting a video signal light in a WDM network system, a manufacturing method therefor, and the WDM network system, and comprises a filter device that reflects some light of an input wavelength-multiplexed light in a direction different from an optical path direction of the input wavelength-multiplexed light and transmits a light of remaining wavelengths, a first optical system in which a reflected light reflected by the filter device is re-incident on a plurality of incident positions on a reflecting surface of the filter device, and a second optical system in which a transmitted light from the filter device is spectrally separated for each wavelength and each separated light is incident on the plurality of incident positions from a transmission surface of the filter device.
摘要:
The present invention is a method of transmitting data of different bit rates in a simple manner and, if positive minimal multiples whose multiple operation values on the bit time lengths 1/Ai for a plurality of communication bit rates Ai become common are minimal multiples ai respectively, an optical line terminal constitutes a time division multiplex signal composed of a first data area having a bit rate Ai/ai and including frame synchronization information and a second data area in which packets addressed to each optical network unit of the bit rate Ai are time division multiplexed, and transmits the time division multiplex signal to a plurality of optical network units via a branching/multiplexing means.
摘要:
Herein disclosed are a mean value detecting apparatus and a mean value detecting integrated circuit, having a mean value detecting unit formed with a resistance and a capacitance for detecting a mean value of an input signal, and an offset voltage adjusting unit connected in parallel to the mean value detecting unit at a connecting point of the resistance and a capacitance of the mean value detecting unit. With the above arrangement, this invention allows a large reduction of a size of the circuit.
摘要:
A system and method for automatically controlling a vehicle speed to a desired cruise speed are disclosed in which in addition to a control unit and a throttle actuator through which an opening angle of an engine throttle valve is adjusted so that the vehicle speed detected by a vehicle speed sensor coincides with a target cruise speed set by a vehicle driver through a set switch, a vehicle speed determining circuit is provided for determining whether the vehicle speed detected by the vehicle speed sensor exceeds a lowest speed limit above which the cruse control by the control unit and throttle actuator becomes effective. When the vehicle speed is below the lowest speed limit, the power supply to the throttle actuator is interrupted so that the cruise control by means of the throttle actuator is cancelled.
摘要:
A cruise control system for an automotive vehicle with a manual or automatic transmission, includes an inhibition circuit. The inhibiting circuit blocks communication between a power supply and an actuator and/or a controller when the manual transmission is set in a predetermined gear or when the automatic transmission is set in a driving range other than the drive range, so as to inhibit the controller from operating in the cruise control mode. When the vehicle is provided with an automatic transmission which is selectively set in first, second, third or fourth gear while the shift lever is set in the drive range position, the cruise control system includes a first inhibiting circuit which blocks the communication when the shift lever is set in a position other than the drive range position, and a second inhibiting circuit which blocks the communication when the automatic transmission is set in either the first or second range while the shift lever is set in the drive range position.
摘要:
An electronic trip meter for an automotive vehicle comprises a memory circuit to store sector distances between a start point and intermediate and final destinations, a distance presetting circuit to determine alarm points near to and before intermediate and final destinations, a counter to count the actual distance travelled from the last destination, a comparator to output a signal from the time when the value in the counter becomes equal to that in the distance presetting circuit until the time when the value in the counter becomes equal to that in the memory circuit, an alarm device driven by the comparator output signal, and a display device. Such an electronic trip meter displays the remaining distance to the next destination while the comparator is sending out an output signal; that is, at any intermediate points in between an alarm-point and the next destination. At other times the display shows a value representative of the total distance travelled. Additionally, the alarm sound is kept ringing in between the alarm-point and the next destination.
摘要:
A graphical user interface device includes an operation procedure information database, a display element information database, an operation determination section, a display element selection section, and an integrated procedure and display-element screen preparation section. Procedure information and a display item to be operated by an operator are registered in the operation procedure information database. The procedure information is text information forming an operation manual. The operation determination section determines a current operation step based on information given from an actual plant. The integrated procedure and display-element screen preparation section prepares a layout of an operation screen allowing the procedure information and the display item of the current operation step to be simultaneously displayed on a single screen of the input/output equipment.