| 摘要 |
FIELD: physics, signalling.SUBSTANCE: invention relates to fire fighting equipment, particularly, to fire alarm device for onboard automated fire fighting means for transport facilities. This device comprises at least one address fire alarm line connected via signalling line control device, optoelectronic switch units of galvanic isolation and communication line with microcontroller. Every signalling line is composed of controlled loop of analog fire pickups with extra resistors and end diode. Signalling line control device is configured to current mirror with generation of "attention", "short-circuit", "fire" and "open-circuit" signals. Signalling line control device outputs are connected via appropriate optoelectronic switch and it optical line with appropriate input port of microcontroller. Microcontroller is composed of adaptive digital fire detector and provided with digital adapter to connection with vehicle onboard hardware parameter pickups as well as built-in and/or detachable flesh memory with control program of thresholds of adaptive digital detection of fire.EFFECT: higher reliability of detection.2 dwg |
