JPS61110473U

JPS61110473U -

Info

Publication number: JPS61110473U
Application number: JP20148084U
Authority: JP
Priority date: 1984-12-25
Filing date: 1984-12-25
Publication date: 1986-07-12
Also published as: JPH0431192Y2

Description

[Brief explanation of the drawing]

第１図〜第４図は本考案の一実施例を示してお
り、第１図は１灯あたりの信号灯制御装置の回路
図、第２図および第３図には出力信号を示す波形
図、第４図は動作を示すフローチヤート、第５図
〜第７図は従来例を示しており、第５図は１現示
の信号灯機を制御する第１の従来例を示す回路図
、第６図は３現示の信号灯機を制御する第２の従
来例を示す回路図、第７図は変流器を示す説明図
である。Ｌ……信号灯、ＳＳ……半導体スイツチ、ＣＴ
……変流器、４……転換スイツチ、７……ＣＰＵ
（論理回路）、２ａ，２ｂ……交流信号、３ａ，
３ｂ，３ｃ……直流電圧信号。 1 to 4 show an embodiment of the present invention, in which FIG. 1 is a circuit diagram of a signal light control device per lamp, and FIGS. 2 and 3 are waveform diagrams showing output signals, FIG. 4 is a flowchart showing the operation, FIGS. 5 to 7 show a conventional example, FIG. 5 is a circuit diagram showing the first conventional example for controlling a conventional signal lamp, and FIG. FIG. 7 is a circuit diagram showing a second conventional example for controlling three conventional signal lamps, and FIG. 7 is an explanatory diagram showing a current transformer. L...Signal light, SS...Semiconductor switch, CT
...Current transformer, 4...Conversion switch, 7...CPU
(Logic circuit), 2a, 2b...AC signal, 3a,
3b, 3c...DC voltage signals.

Claims

[Scope of utility model registration request]

In a signal light control device that controls on/off of current to a signal light using a semiconductor switch, a current transformer that detects the current flowing from the semiconductor switch to the signal light and outputs an alternating current signal is provided between the semiconductor switch and the signal light. A conversion switch capable of switching the DC voltage value applied to the current transformer between a positive side, a neutral position, and a negative side is connected to the current transformer, and further outputs an ON or OFF control signal to the semiconductor switch. At the same time, when the output signal from the current transformer is read and the off control signal is sent to the semiconductor switch, if the output signal does not include the alternating current signal, the conversion switch is sequentially switched. 1. A signal light control device comprising: a logic circuit that outputs a signal to control the current transformer and determines whether or not a DC voltage signal corresponding to the switching control is output from the current transformer.