摘要:
An asynchronous serial communication device in which data transmitted at different speeds coexist and are exchanged. Time losses when errors are generated are effectively eliminated when asynchronous serial data communications for diagnostic failures are performed between a diagnosing tool and an electronic controller via a communications line. In performing the data communications, first data are exchanged between these devices at a low transmission speed and then by switching the speed to high speed various data are exchanged. In a case where communication errors are generated during exchanging, the operation is started again from the data exchanging at the low speed. Here, the edges of the data sampled at the low speed are detected by an edge detecting terminal provided in a communication circuit. A communication error is identified when a difference between a first edge detecting time and a next edge detecting time is shorter than 1 bit time of the low transmission speed data. Based on a further next edge detecting timing, the data receiving by the low speed sampling is started over again.
摘要:
A communication unit in a CSMA/CD data communication system having a non-destructive arbitration function which allows to prevent communication failure due to receiving delay of transmission data or difference of system clocks among communication units by providing in a transmission line transmitting section 14 a counter 32 which is reset by leading edge of the transmission data on a transmission line inputted from a receiving terminal RX through the intermediary of a synchronization comparator 38 and by determining leading and trailing timings of the transmission data per one bit from a count value thereof and reference values defined in leading edge comparator 34 and trailing edge comparator 36.
摘要:
A transmitting circuit is provided which includes a control circuit for transmitting and receiving a communication signal. Transmit information is modulated into a trapezoidal wave signal using a waveform shaping circuit. A communication signal is first generated on the basis of the trapezoidal wave signal and transmitted to a first transmission line. From this communication signal, a second communication signal is generated having an inverted polarity waveform shape relative to the first communication signal. This inverted polarity triangular wave signal is, in turn, output from a second transmission line BUS-. In addition, a receiving circuit is provided for receiving like signals from other communication devices which share the first and second transmission lines BUS+ and BUS-. The receiving circuit includes a comparator circuit for demodulating received signals on the transmission lines to generate square wave equivalent signals which a processing unit can logically interpret. Because communication signals are transmitted (received) and derived in the described manner, they are not subject to adverse effects, such as can result from fluctuation of GND potential levels and power supply differences amongst remote communication systems. Furthermore, because an inverted triangular waveform is generated in addition to, and on the basis of, a regular, modulated triangular wave signal, phase shift problems are avoided and radiation of harmonics noise is favorably reduced even at intermediate, or higher, transmission rates.
摘要:
When a shift command is issued the line pressure is dropped to a first low level until such time as the inertia phase of the shift begins. From this time the level of line pressure is raised and maintained at a second higher level until the end of the inertia phase. During the final stage of the shift, the level of line pressure is again lowered. A spike in the transmission torque output when tends to occur at the beginning of the inertia phase is attenuated, the level of torque which is transmitted during the inertia phase is elevated and spikes which tend to be produced by the final engagement are reduced by the temporarily lowered final stage line pressure level.
摘要:
A sheet binding device includes a pressurizing unit that pressurizes a sheet bundle to bind the sheet bundle, a pressurizing section that is disposed in the pressurizing unit and configured to be moved from a waiting position separated from the sheet bundle to a pressurizing position at which the pressurizing section pressurizes the sheet bundle, a drive motor that actuates the pressurizing unit, and a controller that controls the drive motor such that the pressurizing section is engaged with the sheet bundle at a predetermined setting velocity.
摘要:
In a device installed in a vehicle for monitoring a target section in the vehicle, an executing unit executes a specific process for addressing an abnormality in the target section, and an instructing unit instructs the executing unit to execute the specific process when an abnormality occurs in the target section. A determining unit determines when the specific process is required to be checked. A checking unit instructs the executing unit to execute the specific process independently of whether an abnormality occurs in the target section each time it is determined that the specific process is required to be checked, thus checking whether an abnormality occurs in the specific process.
摘要:
A communication network system has a host network and low-ranking networks connected with the host network through respective interchange terminals. Terminals containing the interchange terminals in the host network perform communication based on FlexRay. FlexRay sets a static segment and a dynamic segment every communication period. Communication zones are fixedly allocated to the respective terminals in each static segment. Communication zones are changeably allocated to the respective terminals in each dynamic segment. Terminals of each low-ranking network perform communication based on LIN or CAN protocol. The interchange terminals connect a transmission line of the host network with transmission lines of the low-ranking networks during the transmission period of each dynamic segment, so that each terminal of each low-ranking network can perform communication based on LIN or CAN protocol with the terminals of the other low-ranking networks through the high-ranking network without any protocol conversion.
摘要:
In a device installed in a vehicle for monitoring a target section in the vehicle, an executing unit executes a specific process for addressing an abnormality in the target section, and an instructing unit instructs the executing unit to execute the specific process when an abnormality occurs in the target section. A determining unit determines when the specific process is required to be checked. A checking unit instructs the executing unit to execute the specific process independently of whether an abnormality occurs in the target section each time it is determined that the specific process is required to be checked, thus checking whether an abnormality occurs in the specific process.
摘要:
A heat sink board having a first heat sink and a second heat sink with a smaller linear expansion coefficient than that of the first heat sink and being bonded to the first heat sink to form the heat sink board. The second heat sink is fitted to the first heat sink, and a material of the first heat sink in the vicinity of a boundary between the fitted heat sinks is plastically deformed for close adhesion to the second heat sink. A forming method makes bonding between the first and second heat sinks possible at room temperature, and the heat sink board made of a composite member having a high flat-surface accuracy can be easily and reliably obtained.
摘要:
A D-aminoacylase having a high substrate specificity is provided. This D-aminoacylase can produce D-amino acids from N-acetyl-D,L-amino acids conveniently and efficiently at a low cost. A D-aminoacylase produced by a microorganism of genus Defluvibacter; which acts on a N-acetyl-D-amino acid; which has a molecular weight (as determined by electrophoresis) of about 55,000 daltons, and an isoelectric point (as determined by two-dimensional electrophoresis for denatured system) of 5.3; which acts on N-acetyl-D-valine, N-acetyl-D-leucine, and the like, but not on N-acetyl-L-valine, N-acetyl-L-leucine, and the like; which has an optimal temperature of 37° C. (pH 8) and an optimal pH value of 8 to 8.5 at 37° C.; and whose activity is inhibited by Mn2+, Co2+, Ni2+, and Zn2+ each at 1 mmol/L, and by dithiothreitol, 2-mercaptoethanol, o-phenanthroline, and L-cysteine each at 5 mmol/L.