| 摘要 |
FIELD: railway automatics and signaling. ^ SUBSTANCE: proposed device contains train location unit, unit recording train entering the crossing, sound signal forming unit and electric loudspeakers placed in its circuit. Moreover, device is furnished with time relay made for changing its state in daytime and at night. Sound signal forming unit is made programmable, with possibility of simulation according to noise background of train approaching railway crossing. Unit recording tracin entering the crossing has train wheel passing detector on crossing and relay fixing train entering the crossing. Train location unit is provided with series-connected vibroacceleration sensor and rail vibroacceleration control unit and relay detecting train entering the crossing approach section. Said relay is connected to output of rail vibroacceleration control unit through rear contact of relay detecting entrance of crossing. Sound electric loudspeakers are connected to output of unit forming sound signals through power amplifiers and rear and front contacts of time relay. Resistors are connected in series with front contacts of time relay closing at night. Rail crossing train entering recording unit and sound signal forming unit supply buses and buses to set the latter in initial position are connected to supply source through front contact of relay fixing train entering the crossing approach section. ^ EFFECT: improved safety of railway traffic. ^ 2 cl, 1 dwg |
