The internal auxiliary filament led light-emitting chip and the cold wire inspection circuit of the control circuit in the railway point type double-wire led signal lighting device

Abstract

The invention discloses an internal auxiliary filament LED light-emitting chip and a cold wire inspection circuit of a control circuit in a railway point type double-wire LED signal lighting device, mainly including an internal auxiliary filament LED light-emitting chip and a controlled cold wire inspection circuit module, a railway point Double wire LED signal lighting device, railway signal lighting adapter. The invention ensures that when the main filament of railway point type double-filament LED signal lighting is working normally, the spare auxiliary filament is also in a state of normal operation, and once the auxiliary filament is broken, it will immediately send an alarm signal feedback to the outside, thereby ensuring The railway signal control command system can operate normally and safely 24 hours a day.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a cold wire inspection circuit of an internal sub-filament LED light-emitting chip and a control circuit in a railway point-type double-wire LED signal lighting device. Background technique [0002] Conventional civil lighting, traffic signal lighting, etc., are all lit by a single filament. The high-level railway signal lighting for semi-military command train operation uses double-filament bulbs (or one main and one pair of two bulbs) to light the lights. During normal operation, the main filament lights up the auxiliary filament for backup. Considering the high safety and important features of this high-level railway signal lighting, the railway department requires that the auxiliary filament circuit should be checked at the same time when the main filament is normally on and working, so as to ensure that when the main filament is suddenly damaged and the light is turned off, the auxil...

AI Technical Summary

Problems solved by technology

The internal sub-filament LED light-emitting chip, power supply, and control circuit in the railway point-type double-filament LED signal lighting device are much more complicated than only one sub-filament of traditional signal bulbs. The internal sub-filament LED light-emitting chip and control circuit cooling Silk inspection is quite technically difficult

So far, all railway point double-wire LED signal lighting devices at home and abroad can only achieve two external lead wires between the two equipment of the railway point double-wire LED signal lighting device and the railway signal lighting adapter, the auxiliary wire and the return line. The simple external auxiliary filament inspection, but can not conduct a complete inspection of the most critical internal auxiliary filament circuit in the point-type double-filament LED signal lighting device, that is, the most critical internal auxiliary filament circuit in the point-type double-filament LED signal lighting device cannot be completely inspected. Sub-filament LED light-emitting chip and control core main circuit for online safety inspection

Because of the lack of the above-mentioned internal auxiliary wire inspection technology, the problem of whether the auxiliary filament LED light-emitting chip and the control core main circuit of the point-type double-filament LED signal lighting device can be reliably lit has become the popularization and use of this LED signal lighting device. major safety hazards in

When the spare auxiliary filament LED light-emitting chip, auxiliary power supply, and auxiliary control circuit are not working normally (normal situations that inevitably occur), if the main filament is suddenly damaged, all the main and auxiliary filaments will be turned off, directly affecting the train. The normal operation of the system will not even bring about more dangerous safety accidents

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