| 摘要 |
PURPOSE:To alarm the car over-speed outward, by arranging a monitoring lamp in the speed alarming apparatus and an indicating lamp outside the car and the providing such a control circuit with its checking circuit which light said monitoring lamp and indicating lamp in a stop, make them blink over a predetermined speed and make them go off below said speed. CONSTITUTION:In a car stop monitoring circuit STP.MT that receives an output of the car speed detector circuit SP.DET as input, when the charging voltage of cpacitor C6 is over the voltage of Zener diode ZD2 while the car stopping, transistor (Tr)Q2 is ON, and car stop is displayed by putting on said monitoring lamp LED and indicating lamp (IL). In an oscillator circuit OSC which receives an output of a running monitoring circuit RN.MT as input, as transistor TrQ5 becomes OFF when the speed is over the predetermined value, TrQ7 is ON as TrQ6 is ON, and TrQ6 is OFF as TrQ7 is ON, and thus ON and OFF continue alternatively to lead to an oscillating condition and the lamp blinks while a buzzer BZ sounds intermittent ringing tone. And when the check switch (SW) becomes ON, Tr Q8, and Q9 are ON to put on a lamp and check it. |
