Abstract: An active fixed block track circuit comprises at least a fixed block section, comprising at least two rails corresponding to each other, each having an isolation connector at two ends thereof and connected to a power supply unit and a traffic signal; a short driving unit, connected to each of the two rails within the fixed block section; and a detection unit, connected to the short driving unit. In this manner, not only the previous rail traffic signal circuit function where no more than one train may be allowed into the same fixed block section is maintained, but also another train approaching from the rear may be prevented from entering the fixed block section when the detection unit at the fixed block section detects an exceptional case happening at a neighboring fixed block section so that the traffic signal unit is switched into a stop traffic signal.

Abstract: An active fixed block track circuit comprises at least a fixed block section, comprising at least two rails corresponding to each other, each having an isolation connector at two ends thereof and connected to a power supply unit and a traffic signal; a short driving unit, connected to each of the two rails within the fixed block section; and a detection unit, connected to the short driving unit. In this manner, not only the previous rail traffic signal circuit function where no more than one train may be allowed into the same fixed block section is maintained, but also another train approaching from the rear may be prevented from entering the fixed block section when the detection unit at the fixed block section detects an exceptional case happening at a neighboring fixed block section so that the traffic signal unit is switched into a stop traffic signal.

Abstract: A multi-computer vision recognition system for a level crossing obstacle is disclosed, comprising vision image systems, a position determination system, an obstacle determination resolution system and a power unit, where vision image systems which may operate all day long operate simultaneously, information of the single vision image systems is each computed by using the position determination system, and then the computed result is introduced to the obstacle determination resolution system for determination, whereby achieving an increased obstacle recognition result and a promoted obstacle recognition accuracy.

Abstract: A tool suspension device includes a main body having a first side formed with a mounting hole and a second side provided with a mounting portion. The mounting hole of the main body has a periphery formed with a catch edge. The mounting portion of the main body has an inside formed with a mounting space communicating with the mounting hole. Thus, the ratchet wrench can be mounted on and detached from the tool suspension device easily and conveniently, thereby facilitating the user using the ratchet wrench. In addition, the tool suspension device can be reused repeatedly.