KR19990008384U - Life detection device and detection method of fluorescent lamp - Google Patents

Abstract

In the fluorescent lamp life detection device, a light detection unit for detecting the light output from the fluorescent lamp, a pulse counter unit for converting the signal detected by the light detection unit to a constant level, and in the pulse counter unit And a control unit for storing a pulse counter in a memory by receiving an output signal, and the life detection method includes a life detection device of a fluorescent lamp, which detects light output from the fluorescent lamp and determines whether the pulse counter is 60 Hz or more. And a step of determining whether the pulse counter is less than 60 Hz and 0 or more, and recognizing that the fluorescent lamp is normal when the pulse counter is 60 Hz or more.

Description

Life detection device and detection method of fluorescent lamp

The present invention relates to a lifetime detection device and a detection method of a fluorescent lamp, and more particularly, to a lifetime detection device and a detection method of a fluorescent lamp that can automatically detect the lifetime of the fluorescent lamp when using the fluorescent lamp for a long time.

1 is a circuit diagram showing a general fluorescent lamp lighting device.

Referring to FIG. 1, a general fluorescent lamp lighting device connects a bridge rectifier 3 to both ends of a fluorescent lamp 2 to which a ballast 1 is coupled, and drains a field effect transistor including an electronic switch unit 4 on an output side thereof. And a source are connected to each other, and the ac control DAIC DA1 and the bias resistor R3 are connected in parallel to the drain and the gate of the field effect transistor.

In addition, the base and emitter of the bipolar transistor Q1 are connected to the gate and the source of the field effect transistor, and are also connected to the zener diode ZD1 in parallel.

At this time, the thermistor S1 and the resistor R2 which are protection circuits are connected in parallel to the base and the emitter of the bipolar transistor Q1.

A thyristor made of the trigger section 5 is connected to the output side of the bridge rectifier 3, and a gate thereof is connected to a collector of the bipolar transistor Q1.

On the output side of the bridge rectifier 3, a resistor R1, a diode D1, and a capacitor C1 are connected in parallel, and at this time, the output terminal of the diode D1 is a gate of a thyristor and a bipolar transistor Q1. It is commonly connected to the collector.

In the lighting device of a general fluorescent lamp configured as described above, a start operation is performed as the AC power source AC is supplied to the bridge rectifier 3 through the filaments A and B of the ballast 1 and the fluorescent lamp 2.

When pulsation is supplied to the output terminal of the bridge rectifier 3, first, the switch effect transistor, which is the electronic switch unit 4, is turned on, and then the thyristor, which is the trigger element 5, is turned on according to the charge charged in the capacitor C1. .

Next, the electronic switch unit 4 is turned off according to the turn-on operation of the thyristor, and the filaments A and B are supplied at the amplified voltage supplied as the bipolar transistor Q1 is conducted with the charge charged in the capacitor C5. Preheats the fluorescent lamp (2).

At this time, when the fluorescent lamp 2 is turned on, an input current flows between the filaments A and B of the fluorescent lamp 2, so that the voltage supplied to the base of the bipolar transistor Q1 is lowered below a prescribed value so that the transistor Q1 is turned on. Is turned off.

The fluorescent lamp lighting device configured as described above may cause blackening when the fluorescent lamp is used for a long time. In this case, as the fluorescent lamp continues to blink, the bipolar transistor may be overheated and damaged.

In addition, there is a problem that the manager inspects the flicker of fluorescent lights and replaces them in a building having a large number of offices.

The present invention has been made to solve the problems according to the prior art, the object of the present invention is to detect the flicker of the fluorescent lamp in the light sensing unit to detect the life of the fluorescent lamp to inform the user when to replace the fluorescent lamp and the detection method In providing.

1 is a circuit diagram showing a general fluorescent lamp lighting device,

2 is a block diagram illustrating a life detection device of a fluorescent lamp according to the present invention;

3 is a flowchart illustrating a life detection method of a fluorescent lamp according to the present invention.

Explanation of symbols for main parts of the drawings

10: fluorescent light 11: light detector

12: pulse counter unit 13: control unit

14: memory

Features of the lifetime detection device and detection method of the fluorescent lamp according to the present invention, in the fluorescent lifetime detection device, a light sensing unit for detecting the light output from the fluorescent lamp, and converts the signal detected by the light sensing unit to a constant level And a control unit configured to receive a signal output from the pulse counter unit and store a pulse counter in a memory. The life detection method includes a light output from the fluorescent lamp in a detection method of a life detection device such as a fluorescent lamp. Determining whether the pulse counter is 60Hz or more by detecting the; and determining whether the pulse counter is less than 60Hz and 0 or more, and recognizing that the fluorescent lamp is normal when the pulse counter is 60Hz or more. The user can manage it efficiently.

Hereinafter, a preferred embodiment of the life detection device and detection method of the fluorescent lamp according to the present invention.

Figure 2 is a block diagram showing a life detection device of a fluorescent lamp according to the present invention.

Referring to FIG. 2, the apparatus for detecting a lifetime of a fluorescent lamp according to the present invention includes a light detector 11 for detecting light output from the fluorescent lamp 10, and a signal detected by the light detector 11 at a constant level. A pulse counter 12 for converting and a control unit 13 for receiving a signal output from the pulse counter 12 to store a pulse counter in the memory (14).

Looking at the operation of the life-sensing device of the fluorescent lamp according to the present invention configured as described above are as follows.

3 is a flowchart illustrating a life detection method of a fluorescent lamp according to the present invention.

Referring to Figure 3, the life detection method of the fluorescent lamp according to the present invention

First, the light output from the fluorescent lamp 10 is detected by the light detecting unit 11 converts the detected signal to a constant level and transmits it to the pulse counter unit 12, the pulse counter unit 12 transmits a pulse counter Output to the control unit 13.

At this time, the control unit 13 determines whether the pulse counter is 60Hz or more (S101), and if the pulse counter is 60Hz or more, the fluorescent lamp is recognized as normal (S102) and notifies the user of the fluorescent lamp state (S103).

If the pulse counter is less than 60Hz, it is again determined whether the pulse counter is 0 or more (S104) and the fluorescent lamp is flickered (S105) to inform the user of the fluorescent lamp state (S103).

If the pulse counter does not appear, it is recognized that the fluorescent lamp is off (S105) and the user is notified of the fluorescent lamp state (S103).

Therefore, the frequency output from the pulse counter in the normal operation of the fluorescent lamp is usually 60Hz or more.

However, if the flicker of the fluorescent lamp is less than 60Hz by using the fact that the control unit can know the state of the fluorescent lamp.

The lifetime detection device and detection method of the fluorescent lamp according to the present invention are easy to read by the user in terms of building maintenance when the fluorescent lamp is used for a long time without a person checking the status of the fluorescent lamp when there is a flicker of the fluorescent lamp installed in the building. There is an advantage that can be replaced.

Claims (4)

In the life detection device of a fluorescent lamp, A light detector for detecting light output from the fluorescent lamp; A pulse counter unit for converting the signal sensed by the light detector into a constant level; And a control unit for receiving a signal output from the pulse counter unit and storing a pulse counter in a memory. In the detection method of the lifetime detection device of a fluorescent lamp, Sensing whether the pulse counter is 60 Hz or more by sensing the light output from the fluorescent lamp; Determining whether the pulse counter is less than 60 Hz and zero or more; And if the pulse counter is 60 Hz or more, recognizing that the fluorescent lamp is normal. The method of claim 2, And if the pulse counter is less than 60 Hz and is equal to or greater than 0, detecting the fluorescent lamp flickering. The method of claim 2, If there is no pulse counter, the lifespan detection method of a fluorescent lamp comprising the step of recognizing that the fluorescent lamp is off.