JP2004126082A - Led beacon light monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED beacon light monitoring system which reports an abnormal state when the number of faulty light emitting diodes in an LED unit is a prescribed number or larger. <P>SOLUTION: The LED beacon light monitor system 1 is provided with an LED beacon light 8 having a light emitting diode unit 7 having a plurality of light emitting diodes 10 arrayed to form a luminescent surface 11, an abnormality detector 4 which detects abnormal states of individual light emitting diodes 10, a counter device 5 which counts the number of abnormal states of light emitting diodes 10 and outputs an abnormality signal in the case that the number is a preliminarily set number or larger, and a reporting device 6 which informs the abnormal state in response to the abnormality signal of the counter device 5. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
The present invention relates to an LED marker light monitoring system having a light emitting diode unit.
[0002]
2. Description of the Related Art There is a failure detecting device that specifies an abnormal light emitting diode from among light emitting diode units to facilitate maintenance and inspection work (for example, see Patent Document 1).
[0003]
FIG. 6 shows a configuration of an LED display including the failure detection device disclosed in Patent Document 1. The LED display 50 forms a screen by arranging a plurality of display panels 52 on each of which a plurality of LED lamps 51 are mounted. The failure detection device 53 detects a short-circuit or disconnection of the LED lamps 51 for each of the display panels 52. An electric circuit for detection and a display lamp 54 for specifying and displaying a display panel 52 including a short-circuited or disconnected LED lamp 51 are provided. Then, the failure detection device 53 detects the short-circuit or disconnection of the LED lamp 51 and, at the same time, causes the display lamp 54 to visually recognize which display panel 52 includes the failed LED lamp 51.
[0004]
[Patent Document 1]
JP 2001-125540 A (pages 3 and 4, FIG. 1)
[0005]
In Patent Document 1, even if there is only one failed LED lamp 51, the display panel 52 including the LED lamp 51 is specified to prompt repair. In the LED display device such as the LED display 50, when the light emitting diode is turned off or the light emission luminance is significantly reduced, image omission and image unevenness are conspicuous and image quality is impaired.
[0006]
However, even if one or several of the many light emitting diodes fail, the LED marker lights, LED lighting devices, and the like are hardly damaged, and it is uneconomical to repair based on the failed light emitting diodes. .
[0007]
SUMMARY OF THE INVENTION It is an object of the present invention to provide an LED marker light monitoring system that notifies when the number of failed light emitting diodes of an LED unit is equal to or more than a predetermined number.
[0008]
According to a first aspect of the present invention, there is provided an LED marker light monitoring system, wherein a plurality of light emitting diodes are arranged to form a light emitting surface, and the light emitting diode unit is housed therein. An LED marker lamp having a light body having a light emitting window through which light emitted from the light emitting diode unit passes, and an abnormality detecting device for detecting an abnormal state of each light emitting diode; A counter device that counts the number of abnormal states of the light emitting diodes and outputs an abnormal signal when the number is equal to or greater than a preset amount; and a notifying device that notifies an abnormal state according to the abnormal signal of the counter device. It is characterized by having.
[0009]
The LED marker light may be either a recessed type or a ground type. Further, any of various uses such as for airports and roads may be used.
[0010]
The "abnormal state of the light emitting diode" means that the light emitting diode is not in a normal lighting state, such as disconnection of the light emitting diode, short circuit, or reduced light emission.
[0011]
The notification device may be either a notification using a sound such as a buzzer or a melody, a notification by visually recognizing a display such as a display lamp, or a notification using a combination of both.
[0012]
According to the present invention, when the number of light-emitting diodes in an abnormal state is equal to or greater than a preset number, the abnormal state is notified, so that the LED marker lamp is replaced or the LED unit is repaired or replaced. Can be encouraged.
[0013]
Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of the present invention, FIG. 1 is a configuration block diagram of an LED marker light monitoring system, FIG. 2 is a schematic sectional view of the LED marker lamp, FIG. 3 shows a light emitting diode unit, (A) is a side view, (b) is a front view, and FIG. 4 is a circuit diagram of an abnormality detection device.
[0014]
In FIG. 1, the LED marker light monitoring system 1 includes an LED marker lamp 2, a switching device 3, an abnormality detecting device 4, a counter device 5, and a notification device 6.
[0015]
As shown in FIG. 2, the LED marker light 2 is a recessed aeronautical marker light, and has a light emitting diode unit 7 and a lamp body 8. The light emitting diode unit 7 has a light emitting surface 11 formed by arranging a plurality of light emitting diodes 10 on the surface of a rectangular substrate 9 as shown in FIG. In the light emitting diode 10, red (R), green (G), and blue (B) emission colors are selected as necessary. Further, as shown in FIG. 3A, the light emitting diode unit 7 has a unit body 12 provided on the back side of the substrate 9, and a power supply unit 13, a control unit 14, and the like are provided in the unit body 12. I have. The power supply unit 13 converts a constant current power supplied from the outside into a lighting voltage of each light emitting diode 10 and an operating voltage of the control unit 14 and the like, and supplies them. The control unit 14 controls blinking of each light emitting diode 10 according to a control signal from the outside.
[0016]
And the light emitting diode unit 7 has led out the wiring cord 16 with the connector 15 from the unit main body 12. Each lead wire of the wiring cord 16 is connected between a common terminal and a segment terminal (cathode and anode) of each light emitting diode 10. The wiring cord 16 is connected to the switching device 3 shown in FIG. Here, when the abnormal state of the light emitting diode 10 is remotely monitored, another wiring cord is interposed between the connector 15 and the switching device 3.
[0017]
In FIG. 2, a lamp body 8 is buried and installed on a road surface such as an airport runway or taxiway, and emits light in two directions to indicate a centerline of the runway or taxiway. The lamp body 8 is made of an aluminum casting or the like, and is configured by fixing an upper lamp body 17 and a lower lamp body 18 each formed in a substantially disk shape. The lower lamp body 18 is fitted into a recess on the upper surface of a base 19 buried in the ground, and is fixed to the base 19 with bolts or the like.
[0018]
A space 20 is formed between the upper lamp 17 and the lower lamp 18, and a pair of light emitting windows 21 communicating the space 20 and the outer surface of the upper lamp 17 are formed in opposite directions. An opening is formed. A lens 22 is attached to each light emitting window 21 in a watertight manner. In the space 20, a holder 23 is attached to the lower lamp body 18 facing the inside of each light emitting window 21, and the light emitting diode unit 7 directs the light emitting surface 11 to the light emitting window 21 to each holder 23. And each is supported. That is, the lamp body 8 houses the light emitting diode unit 7 and has the light projecting window 21 through which light emitted from the light emitting diode unit 7 passes.
[0019]
A power supply line (not shown) for supplying a constant current power supply is drawn into the base 19, and this power supply line is electrically connected to the power supply unit 13 of the light emitting diode unit 7. Further, a wiring cord with a connector (not shown) is drawn in from the switching device 3, and the connector of this wiring cord is electrically connected to the connector 15 of the wiring cord 16 derived from the light emitting diode unit 7.
[0020]
In FIG. 1, the switching device 3 is configured to sequentially switch between the common terminal and the segment terminal of each light emitting diode 10 of the light emitting diode unit 7 to connect to the abnormality detecting device 4. This switching may be performed automatically and sequentially, or may be performed manually. Further, the common terminal of each light emitting diode 10 may be shared for each row of the light emitting diode units 7 and the segment terminals may be sequentially switched. Thereby, the number of lead wires such as the wiring cord 16 can be reduced.
[0021]
As shown in FIG. 4, the common terminal and the segment terminal of each light emitting diode 10 are sequentially connected to the input terminals 4 a and 4 b of the abnormality detecting device 4 by the switching device 3. The input terminal 4a is connected to the constant voltage source Vcc via the resistor R1, and the input terminal 4b is connected to the ground E via the resistor R2. The input terminal 4a is connected to the non-inverting input terminal of the comparator OP1, and the input terminal 4b is connected to the inverting input terminal of the comparator OP2. The first reference power supply Vref1 is connected to the inverting input terminal of the comparator OP1, and the second reference power supply Vref2 is connected to the non-inverting input terminal of the comparator OP2. The output terminals of the comparators OP1 and OP2 are respectively connected to the input terminals of the logic circuit 24, and the output terminal of the logic circuit 24 is connected to the output terminal 4c of the abnormality detection device 4.
[0022]
The constant voltage of the constant voltage source Vcc is, for example, 5V, the reference voltage of the first reference power supply Vref1 is 3V, and the reference voltage of the second reference power supply Vref2 is 0.5V. When the light emitting diode 10 is connected between the input terminals 4a and 4b, if the light emitting diode 10 normally emits light, for example, a voltage of about 3.5 V is generated between both ends of the light emitting diode 10. Then, a voltage of about 0.75 V is generated between both ends of the resistor R1 and the resistor R2. Then, a high signal is output from the output terminal of the comparator OP1 and a low signal is output from the comparator OP2, and is input to the input terminal of the logic circuit 24. At this time, the logic circuit 24 does not output a high signal (abnormal signal).
[0023]
When both ends of the light emitting diode 10 are disconnected (opened), a high signal is output from each of the comparators OP1 and OP2, and the logic circuit 24 outputs a high signal (abnormal signal). That is, the abnormality detection circuit 4 outputs an abnormality signal indicating an abnormal state from the output terminal 4c.
[0024]
In addition, when the both ends of the light emitting diode 10 are short-circuited or when the voltage between both ends of the light emitting diode 10 is abnormally low, a low signal is output from each of the comparators OP1 and OP2, and the logic circuit 24 outputs a high signal (an abnormal signal). ) Is output. That is, the abnormality detection circuit 4 outputs an abnormality signal indicating an abnormal state from the output terminal 4c.
[0025]
As described above, the abnormality detection device 4 outputs an abnormality signal when the light emitting diode 10 is not normally lit. The switching device 3 sequentially connects the individual light emitting diodes 10 of the LED marker lamp 2 between the input terminals 4a and 4b, and detects an abnormal state of each light emitting diode 10. Then, the abnormal state of the light emitting diode 10 is sent to the counter device 5.
[0026]
In FIG. 1, a counter device 5 counts the number of abnormal states of the light emitting diode 10 in response to an abnormal signal from the abnormality detecting device 4, and when the number is equal to or greater than a preset amount, the notification device 6 indicates an abnormality. It is configured to output a signal. Here, the preset quantity is, for example, a quantity of 10% of all the light emitting diodes 10 of one light emitting diode unit 7.
[0027]
The notification device 6 is configured to notify an abnormal state in response to an abnormal signal of the counter device 5, and the notification of the abnormal state is, for example, a display of “abnormal” on the display screen 25. This abnormal state indicates that the light emitted from the light emitting diode unit 7 of the LED marker light 2 has decreased to a predetermined amount or less, and replacement of the LED marker light 2 or the light emitting diode unit 7 is promoted.
[0028]
Note that the switching device 3 may be integrated with the abnormality detection device 4.
[0029]
Next, the operation of the embodiment of the present invention will be described.
[0030]
The LED marker light 2 is required to emit a predetermined amount of light from the light emitting window 21. In recent years, the performance of the light emitting diode 10 has been improved, and the amount of light emitted from the light emitting diode 10 has been increased. Then, even if about 10% of the light emitting diode units 7 are turned off, a predetermined amount of light is emitted from the light emitting window 21. For example, even when three light emitting diodes are arranged in the light emitting diode unit 7 and three light emitting diodes are not lit when four light emitting diodes are arranged in the light emitting diode unit 7, a minimum necessary light amount can be obtained.
[0031]
Among the light emitting diodes 10 of the light emitting diode unit 7, the light emitting diode 10 which is not lit or the amount of emitted light is greatly reduced due to disconnection (opening) or the like is detected as an abnormal state by the abnormality detecting device 4. Then, the counter device 5 outputs an abnormal signal when the number of the light emitting diodes 10 in the abnormal state of the light emitting diode unit 7 is equal to or more than a preset number, for example, three or more, and the notification device 6 displays the abnormal state on the display screen. The information is displayed on the display 25, for example. Accordingly, it is monitored that a predetermined amount of light is not emitted from the light emitting window 21 of the LED marker light 2, and replacement of the LED marker light 2 or replacement of the light emitting diode unit 7 is promoted.
[0032]
Next, another embodiment of the present invention will be described.
[0033]
5A and 5B show an LED lighting device according to another embodiment of the present invention, wherein FIG. 5A is a side view and FIG. 5B is a front view.
[0034]
The LED lighting device 26 shown in FIG. 5 is a directly mounted lighting device provided on the ceiling surface 27, and includes an LED module 28, a lighting device main body 29 as an LED lighting device main body, a lighting device 30, and an adapter 31. It is configured.
[0035]
The LED module 28 includes a base 32, a light emitting diode 33, a through hole 34, and a printed board (not shown).
[0036]
The base 32 is made of, for example, polybutylene terephthalate (PBT) resin and has an outer shape of 120 × 120 mm and a thickness of about 10 mm. A plurality of recesses 35 are formed on one surface. The concave portions 35 are formed in a vertical and horizontal direction (in a matrix), each having 10 (a total of 100). The concave portion 35 is formed in a parabolic shape, is formed on a reflective surface (mirror surface) by Al deposition or the like, and the light emitting diode 33 is inserted therethrough.
[0037]
The light emitting diode 33 emits white light, for example, and is formed by a known configuration such that the coating resin of the light emitting portion is formed substantially in a shell shape. The same number of the light emitting diodes 33 as the number of the concave portions 35 are mounted on a printed board via a lead frame (not shown).
[0038]
The through-holes 34 are formed in a columnar shape through the surface of the base 32 surrounded by the concave portions 35, have an inner diameter of 5 mm, and are formed vertically and horizontally in nine pieces (a total of 81 pieces). The through-hole 34 is ventilated from one or the other side of the base 32, and dissipates heat from the inner wall (surface) in response to the ventilation.
[0039]
In the LED module 28 thus configured, a current of 30 mA flows through each light emitting diode 33, and the total input power is about 10 W. At a normal ambient temperature (25 ° C.), a luminous flux of about 200 lumens (lm) is obtained.
[0040]
The lighting fixture main body 29 is formed in a box shape having openings 36, 36 on the upper surface and the lower surface, and has the LED module 28 disposed therein. That is, the edge of the LED module 28 is supported by the lighting fixture main body 29, and one and the other surfaces of the base 32 face the openings 36, 36, respectively. A connector 37 electrically connected to the common terminal and the segment terminal of each light emitting diode 33 via a lead wire (not shown) is provided at the edge of the upper surface of the lighting fixture body 29 for each row. ing. The connector 37 is normally closed by packing or the like to prevent dust and the like from entering. The lighting fixture body 29 is supported by the adapter 31 by connecting pipes 38 of a predetermined length provided on the upper surface side.
[0041]
The adapter 31 is formed in a substantially columnar shape, and houses the lighting device 30 therein. And a pair of electrode blades (not shown) are provided on the upper surface side. The electrode blade is inserted into an electrode blade insertion hole (not shown) of a hooking ceiling 39 provided on the ceiling surface 27, and the adapter 31 is rotated, whereby a power supply electrode (not shown) of the hooking ceiling 39 is provided. ) And are electrically connected. The power supply pole of the hooking ceiling 39 is electrically connected to a commercial AC power supply by a power supply cord (not shown) wired behind the ceiling surface 27.
[0042]
The electrode blade of the adapter 31 is electrically connected to the input terminal of the lighting device 30. In addition, a lead wire (not shown) is led out from an output terminal of the lighting device 30, and the lead wire is inserted into the connection tubes 38, 38 and connected to a printed circuit board.
[0043]
The lighting device 30 is configured by an AC-DC converter, a voltage regulator, and the like, and causes a current of 30 mA to flow through each light emitting diode 33 to light the light emitting diode 33 (light emission). When the light emitting diode 33 is turned on, the LED lighting device 26 emits white light from the opening 36 of the lighting fixture body 29.
[0044]
In the LED lighting device 26, the switching device 3 to the notification device 6 shown in FIG. 1 are connected to a connector 37 provided at the edge of the upper surface of the lighting fixture main body 29, and the LED 33 in the LED module 28 in the abnormal state is connected. The quantity is detected. Then, the notification device 6 notifies that the number of the light emitting diodes 33 in the abnormal state is equal to or more than a preset number, for example, 10 or more which is 10% of all the light emitting diodes 33. Thereby, replacement of the LED lighting device 26 is promoted.
[0045]
According to the first aspect of the present invention, when the number of light emitting diodes in an abnormal state is equal to or greater than a preset number, the abnormal state of the light emitting diode unit housed in the LED marker lamp is notified by the notification device. Since the notification is made, replacement of the LED marker light or replacement of the light emitting diode unit can be performed, and predetermined emission light can be emitted from the LED marker lamp.
[Brief description of the drawings]
FIG. 1 is a configuration block diagram of an LED marker light monitoring system according to an embodiment of the present invention.
FIG. 2 is a schematic sectional view of the LED marker light.
3A and 3B show a light emitting diode unit, wherein FIG. 3A is a side view and FIG. 3B is a front view.
FIG. 4 is a circuit diagram of the abnormality detection device.
FIG. 5 is an LED lighting device showing another embodiment of the present invention, wherein (a) is a side view and (b) is a front view.
FIG. 6 is a schematic front view of an LED display provided with the failure detection device of Patent Document 1.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... LED marker light monitoring system, 2 ... LED marker light, 4 ... abnormality detection device, 5 ... counter device, 6 ... notification device

Claims (1)

A light emitting diode unit in which a plurality of light emitting diodes are arranged to form a light emitting surface, and a lamp that houses the light emitting diode unit and has a light emitting window through which light emitted from the light emitting diode unit passes to the outside An LED beacon having a body;
An abnormality detecting device for detecting an abnormal state of each light emitting diode;
A counter device for counting the number of abnormal states of the light emitting diodes, and outputting an abnormal signal when the number is equal to or greater than a preset number;
A notifying device for notifying an abnormal state according to an abnormal signal of the counter device;
An LED marker light monitoring system, comprising:

Images