Abstract: For a manual gearshift control of conventional vehicle transmission, a vehicle gearshift automatic control device including a first actuator module, a second actuator module and an electronic control unit, is provided in an add-on manner to retrofit the vehicle transmission with both automatic and manual gearshift functions. In an automatic gearshift mode, the electronic control unit executes the vehicle gearshift automatic control method and receives an automatic gearshift command to drive the first actuator module to push a shift lever to implement a lateral shift selection, or to drive the second actuator module to spin a park lever to implement a longitudinal gearshift. For vehicle security, whenever a vehicle gearshift automatic control device failure or a manual gearshift intervention is detected in the automatic gearshift mode, the electronic control unit shuts off the automatic gearshift mode and switches to a manual gearshift mode to perform the manual gearshift function.

Abstract: A heavy vehicle brake control method includes: activating two electro-pneumatic proportional valve control modules to perform braking along a front-axle electrical brake loop and a rear-axle electrical brake loop, respectively; while the two electro-pneumatic proportional valve control modules perform braking along the front-axle electrical brake loop and the rear-axle electrical brake loop, judging malfunctions by detecting the two electro-pneumatic proportional valve control modules; if none of the malfunctions is detected, the two electro-pneumatic proportional valve control modules continuing to perform braking along the front-axle electrical brake loop and the rear-axle electrical brake loop; and, if one or more malfunctions are detected, then switching on a brake-pedal cable control module to control the brake pedal of the brake valve to perform braking. In addition, a heavy vehicle brake control device is also provided.

Abstract: A heavy vehicle brake control method includes: activating two electro-pneumatic proportional valve control modules to perform braking along a front-axle electrical brake loop and a rear-axle electrical brake loop, respectively; while the two electro-pneumatic proportional valve control modules perform braking along the front-axle electrical brake loop and the rear-axle electrical brake loop, judging malfunctions by detecting the two electro-pneumatic proportional valve control modules; if none of the malfunctions is detected, the two electro-pneumatic proportional valve control modules continuing to perform braking along the front-axle electrical brake loop and the rear-axle electrical brake loop; and, if one or more malfunctions are detected, then switching on a brake-pedal cable control module to control the brake pedal of the brake valve to perform braking. In addition, a heavy vehicle brake control device is also provided.

Abstract: A method of accessing data from distributed field equipments by a host through a set of intelligent network gateways is disclosed. The intelligent network gateways link the host on a local area network to the field equipments that are connected to a control network. Initially, configuration software residing in the host is employed to install the intelligent network gateways and the field equipments as a set of virtual equipment data servers, which are capable of continuously accessing, updating, and storing data from the field equipments. The virtual equipment data servers always possess the field equipments' most recent data and are able to communicate to any application program with a standard communication protocol. The method and apparatus facilitate the integration of a variety of field equipments with high-speed data links in a factory environment.

Abstract: A method of accessing data from field equipments by the host through intelligent network gateways which link field equipments over control network and the host over local area network is disclosed. A configuration software in the host is used to install intelligent network gateways and field equipments as virtual equipment data servers. After finishing installation, the virtual equipment data servers accessupdate store data of the field equipments continuously. Now, the virtual equipment data servers always possess the last field equipment data and can link any application program with a standard communication protocol. The application can integrate easily and high speed access data of a various of field equipments in the factory with only one standard communication protocol through distributed virtual equipment data servers.

Abstract: A chip device for positioning control and position recording of a servo motor. The chip device can be operated in two modes: a first mode, and a second mode. In the first mode, the chip device can perform step command conversion, position loop control, multiple shaft synchronization, and recording of the position of the motor shaft. The step command conversion utilizes a digital-differential analysis (DDA) method to convert the step waveform in the command signal into ramp waveform for smoothed control of the servo motor. The position loop control circuit compute for the error in position and then compensates the error to generate a 12-bit 2's complement output which is subsequently converted to analog signal used to drive the servo motor. The purpose of multiple shaft synchronization is to allow a plurality of servo motor to rotate in synchronization and accurately with the same increments.