Railway signal machine status monitoring and constant power supply unit

Abstract

The invention discloses a railway signal machine state monitoring and steady power supply unit which comprises two rectifier filter circuits, a first breaker circuit, an SEPIC converter circuit, a current sampling and monitoring circuit, a window voltage comparator circuit, a quick restart circuit, a logical processing circuit and a second breaker, wherein the two rectifier filter circuits and the first breaker circuit are connected with the output end of a railway signal transformer, and the output end of the second breaker is connected with an optical signal unit and a warning state output circuit. The circuits of the unit can deal with various emergencies in real time and improve reliability of a signal machine. When the damage rate of LED lamps of the railway signal machine reaches 30%, the unit sends a warning signal back to a central control room while the optical signal unit continues to work; when the damage rate of the LED lamps of the railway signal machine reaches 50%, the unit sends a warning signal to the central control room while the optical signal unit is turned off forcibly; when the railway signal machine is short-circuited or undervoltag or disconnected or have other abnormal situations, the railway signal machine is shut down, and a warning signal is sent back to the central control room.

Description

technical field [0001] The invention relates to a state monitoring and constant power supply unit of a railway signal machine, which belongs to the technical field of circuits. Background technique [0002] At present, industrial frequency railway signal transformers (such as BXI-34 type) are generally used in China to supply power to the light-emitting units of railway signal machines (such as incandescent lamps, LED light-emitting discs, etc.). Since the output voltage of the railway signal transformer will be affected by the fluctuation of the input voltage and the installation distance, in practical applications, it is easy to affect the working status of the light-emitting unit and the status monitoring circuit, and even cause the brightness of the signal machine to change and the monitoring circuit to be wrong. action and other serious consequences. [0003] When the installation distance changes greatly, although the line voltage attenuation of AC220V can be eliminat...

AI Technical Summary

Problems solved by technology

However, the adjustment through the wiring method is discontinuous, the adjustment range is very limited, and it will cause problems such as complicated connection; at the same time, the connection adjustment method through the railway signal transformer cannot cope with the short-term fluctuation of the input grid voltage.

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