Fuel gas alarm controller

• Main Authors: MI SHUXIA, GUO JINGJIANG, QIN XUCHANG, XING KAICHUN
• Format: Patent
• Language: Chinese; English
• Published: 16.10.2013
• Subjects: ALARM SYSTEMS; ORDER TELEGRAPHS; PHYSICS; SIGNALLING; SIGNALLING OR CALLING SYSTEMS

The utility model discloses a fuel gas alarm controller. The controller belongs to an alarm control device with response to a certain condition, particularly to a fuel gas detection alarm control device. The controller comprises an AC-DC power supply, a DC-DC power supply and a control circuit. The system is characterized in that a gas alarm inputs a gas density signal to a CPU PIC16F887 by a 4-20 mA input circuit, and the CPU is further connected with a signal detection circuit, a 485 signal output circuit, a keyboard signal acquisition circuit, a sound alarm circuit, a use state indication circuit, a nixie tube display circuit, a node output circuit and a clock circuit. The controller enables real-time display of external gas density information, and displays use state of the controller by an LED indication lamp. The controller can perform various settings by an external input button and output high and low reporting signals so as to timely response to the change of the external environment.