KR100211523B1 - Illumination Characteristics Control Method and Circuit of Inverter Stand Lamp Using Infrared Sensor - Google Patents

Abstract

The present invention relates to a method of controlling illuminance characteristics of an inverter stand lamp using an infrared sensor, and determines whether there is a key input when the power is turned on, and if there is a key input, a human body is detected around the inverter stand by the infrared sensor. When the human body is detected, the lamp is turned on, and when the lamp is turned on, it is determined whether there is a key input, and when there is a key input, the lamp is turned off, and when there is a key input when the power is turned on, the human body is turned around the inverter stand by the infrared sensor. If it is not detected, the timer starts counting a predetermined time and determines whether the human body is still detected. If the human body is detected, the lamp driving is turned on. If the human body is not detected by the set time, the lamp driving is turned off. Can only extend the life of the lamp by turning on the inverter stand. It said, it is possible to reduce the power consumption of the lamp.

Description

Illumination Characteristics Control Method and Circuit of Inverter Stand Lamp Using Infrared Sensor

The present invention relates to a method of controlling illuminance characteristics of an inverter stand lamp using an infrared sensor, and in particular, the driving of a lamp is turned on / off based on the presence or absence of human body sensing by an infrared sensor when a key is input for lighting the lamp. The present invention relates to a control method of illuminance characteristics of an inverter stand lamp, which enables the lamp to be turned on or off in a power saving mode.

A typical inverter main power circuit diagram is shown in FIG. The configuration of the inverter main power circuit shown in FIG. 1 is as follows. As shown in FIG. 1, the MOS field effect transistors FET1 and FET2 having a switching function and the gate side G of the MOS field effect transistors FET1 and FET2 connected to the secondary side of the transformer T. And a diode (D1), (D2), a capacitor (Cs), and an inductance (Ls) connected in parallel to the drain side (D) and the source side (S) of the MOS field effect transistors (FET1) and (FET2). The parallel resonance tank circuit and the filter capacitors C1 and C2 are configured to cause resonance in the main power circuit.

However, such an inverter main power circuit includes a tank circuit composed of a capacitor (Cs) and an inductance (Ls) while the MOS field effect transistors (FET1) and (FET2) alternately turn on / off (OFF). The charging / discharging of the square wave is repeated, and in the half cycle during charging, the charging current is bypassed from the voltage source 2E to the ground through the MOS field effect transistor (FET1) and Ls, r, Cs, r, and C2. An opposite current flow occurs in the furnace, which is discharged from voltage source 2E via r, Cs, r, Ls and MOS field effect transistors (FET2).

As the current is discharged through the MOS field effect transistor FET2, as the frequency increases, the current that is not in the lamp decreases. This current is proportional to the light output of the lamp, which eventually darkens the brightness of the lamp.

In addition, the conventional ballast discharges through only one point of the filament (filament), so that a bright spot is created at that point. In this case, if the light output of the fluorescent lamp is increased above the rating, the miso rises at the bright point of the filament and the lamp life is reduced.

In addition, fluorescent lamps are usually turned on by alternating current. During normal operation, electron emission is mainly generated at high potentials at both ends of the filaments, causing bright spots. During inversion, cations have high energy and impinge on the cathode surface. Ba and Ca, which are electron emission materials, are gradually popped out and attached to the judgment part, thereby blackening the lamp.

In addition, if the fluorescent lamp is turned on for a long time, the cathode material is consumed so much that the electron emission ability is lost, and thus the lighting is impossible. This blackening phenomenon has a serious effect on the life of the lamp, especially in the deep sea at the onset of discharge.

In addition, all discharge lamps, including fluorescent lamps, have a negative resistance characteristic in which the voltage across the lamp decreases as the lamp current increases. Due to this negative resistance, the lighting of the lamp may be unstable or the lamp may be broken.

Therefore, there is a need to increase the life of the lamp by preventing unnecessary lighting and lighting maintenance, and to achieve a power saving.

The present invention has been made to solve the above-mentioned drawbacks, and its object is to use the infrared sensor in the inverter stand to detect whether the human body is in the vicinity while controlling the on / off of the lamp to turn on the lamp unnecessarily The present invention provides a method of controlling illuminance characteristics of an inverter stand lamp using an infrared sensor to prevent a decrease in lifespan and an increase in power consumption of a lamp caused by a continuous light or continuous lighting.

In order to achieve the above object, the present invention provides a method for controlling illuminance characteristics in an inverter stand using an infrared sensor, the first step (S1) of detecting whether there is a key input for lighting when the power is turned on. If there is a key input, the second step (S2) of checking whether the human body is detected around the inverter stand using the infrared sensor, and the third step of determining the presence or absence of the human body based on the detection signal of the infrared sensor ( S3), a fourth step S4 of turning on the lamp driving when the human body is detected, a fifth step S5 of determining whether the key input is re-applied when the lamp driving is turned on, and a second step S2 if there is no key input. ), And if there is a key input, the sixth step (S6) of turning off the lamp drive, and if the human body is not detected in the third step (S3), the seventh step (S7) of clearing the timer, and clearing the timer. An eighth step S8 of counting time; If the human body is detected, the ninth step (S9) continues to check, and if the human body is detected, proceeds to the fourth step (S4) to turn on the lamp drive, if the human body is not detected, the count time (T) is the set time ( If it is greater than or equal to T) and not equal, proceed to the eighth step S8. If the count time is greater than or equal to the set time, proceed to sixth step S6 to turn off the lamp driving. Characterized in that consisting of.

1 is a general inverter main power circuit diagram.

2 is a structural diagram of an inverter stand lamp of the present invention to which an infrared sensor is attached.

3 is a block diagram of a system of the present invention for controlling illuminance characteristics of an inverter stand lamp.

4 is a flowchart according to the present invention.

* Explanation of symbols for main parts of the drawings

10: AC cord 20: Inverter stand support

30: infrared sensor 40: fluorescent lamp

50: lamp cover 60: key input unit

70: constant voltage unit 80: lamp driving unit

90: display unit U-COM: microcomputer

Hereinafter, a configuration according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a structural diagram of the inverter stand lamp of the present invention, to support the support 20 of the inverted stand so that the illumination characteristics of the fluorescent lamp 40 mounted under the fluorescent lamp cover 50 can be controlled according to the presence or absence of a human body. The infrared sensor 30 is configured to further include.

3 is a structural diagram of the inverter stand lamp of the present invention with an infrared sensor attached thereto, as shown in the figure, a key input unit 60 which is a key input means for turning on and off the inverter stand when a key is input. Infrared sensor 30 for detecting the presence of a user, i.e., the human body, constant voltage unit 70 for preventing voltage fluctuation due to changes in load current, and microcomputer (U-) for checking the signal of the infrared sensor during key input. COM), a lamp driver 80 for turning on / off in response to a signal checked from the microcomputer, and a display unit 90 for displaying a lamp driving on / off state based on the microcomputer.

4 is a flowchart of illuminance characteristics control according to the present invention. As shown in the figure, a first step S1 of detecting whether there is a key input for lighting at power-on and a key input are provided. A second step (S2) of checking whether a human body is detected around the inverter stand using the infrared sensor, a third step (S3) of determining whether or not the human body is detected based on a detection signal of the infrared sensor, and the human body Is detected, the fourth step S4 of turning on the lamp driving, the fifth step S5 of determining whether the key input is re-applied when the lamp driving is turned on, and returning to the second step S2 if the key input is absent. A sixth step (S6) of turning off the lamp drive if there is an input, a seventh step (S7) of clearing the timer if no human body is detected in the third step (S3), and a counting time after the timer is cleared Step 8 (S8) and keep checking whether the human body is detected after the count If the human body is detected, the process proceeds to the fourth step (S4) to turn on the lamp, and if the human body is not detected, compares whether the count time (T) is greater than or equal to the set time (T). If it is not the same, the process proceeds to the eighth step S8. If the count time is greater than or equal to the set time, the process proceeds to the sixth step S6.

Subsequently, when the power is turned on (S), the microcomputer (U-COM) determines whether there is a key input from the key input unit 70 (S1). Scan the signal detected by the infrared sensor 30 to detect whether there is a (S2).

Next, the microcomputer U-COM determines whether the human body is detected based on the checked signal (S3), and when the human body is detected, displays it on the display unit 90 and turns on the lamp driving unit 80 ( S4). At this time, the microcomputer U-COM determines whether there is a key input from the key input unit 60 while the lamp driver 80 is turned on (S5), and returns to step S2 if there is no key input. The lamp driving unit 80 is turned off (OFF) to turn off the lamp 40 (S6).

On the other hand, if it is determined in step S3 that the human body is not detected by the infrared sensor 30, the microcomputer (U-COM) clears the timer (S7), and counts the time (S8).

In this state, the microcomputer U-COM continuously determines whether the human body is detected based on the signal detected by the infrared sensor 30 (S9), and if it is determined that the human body is detected, the process proceeds to step S4 described above. If it is determined that the human body is not detected, the driving unit 80 is driven and the counted time T is greater than or equal to the preset time T (S10). It is determined that the human body is detected while continuing counting, and if the counted time is greater than or equal to the set time, the lamp driving unit 80 is turned off to turn off the fluorescent lamp 40 to generate the lamp from unnecessary lighting. It can reduce power consumption.

As described above, the present invention checks the signal of the infrared sensor which detects the presence or absence of human body detection when a key is input and turns on the driving of the lamp when the human body is detected, and turns off the driving of the lamp when the human body is not detected. By turning on or turning off, it is possible to prevent the deterioration of the life of the lamp caused by unnecessary lighting and maintenance of the lamp, and also to reduce the power consumption caused by the lighting of the lamp.

Claims (1)

A method of controlling illuminance characteristics in an inverter stand by using an infrared sensor, the method comprising: a first step (S1) of detecting whether a key input for lighting is turned on when the power is turned on; A second step (S2) of checking whether a human body is detected around the inverter stand by using an infrared sensor if there is a key input; A third step (S3) of determining whether a human body is detected based on a detection signal of the infrared sensor; A fourth step S4 of turning on lamp driving when a human body is detected; A fifth step (S5) of determining whether the key input is re-applied when the lamp driving on; A sixth step S6 of returning to the second step S2 if there is no key input and turning off the lamp driving if there is a key input; A seventh step S7 of clearing the timer if the human body is not detected in the third step S3; An eighth step S8 of counting time after clearing the timer; A ninth step S9 of continuously checking and determining whether a human body is detected after counting; If the human body is detected, the process proceeds to the fourth step S4 and the lamp driving is turned on.If the human body is not detected, the count time T is greater than or equal to the set time T. If the count time is greater than or equal to the set time, go to the sixth step (S6) to go to the tenth step (S10) to turn off the lamp driving intensity of the inverter stand lamp using the infrared sensor, characterized in that Characteristic control method.