JP2016184492A - Marker lamp device and marker lamp system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a marker lamp device that can detect an abnormality state of lighting control means and a light source, continue power supply to the light source even when the abnormality means malfunctions, and prevent snow melting or condensation by heating means.SOLUTION: A marker lamp device 50 includes first saturable means 20 into which constant current power is input; a light source 43 having a light emitting element; lighting control means 42 which receives the output of the first saturable means 20 and performs lighting control of the light source 43; second saturable means 30 whose input portion is connected to the input portion of the first saturable means 20 in series; abnormality detection means 60 for monitoring the state of the light source 43 or the lighting control means 42, closing the output portions of the second saturable means 30 at a normal time and opening the output portions of the second saturable means 30 when an abnormality state is detected; and heating means 80 which is connected in series between the output portions of the second saturable means 30.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a marker lamp device and a marker lamp system.

  For example, a plurality of embedded or ground-type marker lamps such as runways and taxiways at airports are connected in series with each other, and are supplied with power from an AC constant current power supply device so as to be lit. Since the marker lamp needs to change the light output corresponding to the surrounding environment, it can be dimmed by changing the output current value of the constant current power supply device.

  Each marker lamp is supplied with power from the constant current power supply to a light bulb as a light source through a saturable means, for example, a saturable insulating transformer. When the saturable means is a saturable type isolation transformer, the input winding of the isolation transformer is connected in series to the output side of the constant current power supply device, so the light source of any one of the plurality of marker lamps Even if it decides, it does not invite other indicator lights to go off.

  In such a beacon lamp system, when the light source of any beacon lamp is decentered, the output of the constant current power supply device changes when the saturable means corresponding to the beacon lamp reaches saturation or during saturation. . For example, an increase in the output voltage value of the constant current power supply device due to a change in the load impedance value due to the disconnection of the light source, a distortion of the output voltage or current waveform of the constant current power supply device due to an increase in equivalent inductance, a voltage / current phase difference An output change such as a change occurs. Therefore, by detecting this change in output, the light source is detected to be broken.

  On the other hand, a solid light emitting element such as a light emitting diode (LED) has recently been used as a light source of a marker lamp from the viewpoint of long life and low power consumption instead of a light bulb. When a solid-state light emitting element is used as a light source, as a lighting control means, a rectifying means, a voltage stabilizing means, a current adjusting or voltage adjusting means for controlling a current or applied voltage of the solid light emitting element to obtain a required light amount, etc. Will be required. In this case, unlike the case where a light bulb is used as the light source, a short circuit of the light source (solid light emitting element) or a failure of the lighting control means may occur in addition to the opening of the light source (solid light emitting element).

  However, when the light source is a solid-state light emitting element, even if the light source is opened, short-circuited, or the lighting control means is broken, the output side of the saturable means is unlikely to be in an open state as in the case of a light bulb. The reason for this is that since the lighting control means is present, the output side of the saturable means is not immediately opened even if, for example, the solid-state light emitting element fails to open. In particular, when the lighting control means includes a voltage stabilizing means, it is difficult to saturate the saturable means. When the solid state light emitting device is short-circuited, the saturable means is hardly saturated for the same reason. Further, even when a part of the lighting control means fails, the saturable means may not reach saturation depending on the location of the failure. The fact that the saturable means does not reach saturation is a state close to that at normal load, and therefore it is possible to supply power to other marker lamps.

  As described above, if the saturable means is less likely to be saturated, it is difficult to cause a change in the output of the constant current power supply device, and it is difficult to detect the disconnection.

  Further, when the semiconductor light emitting element is used as the light source, the power consumption is small and the heat generation amount is small as compared with the light bulb. For this reason, when snow accumulates on the light projecting section, the snow cannot be melted, and there is a problem that the required irradiation characteristics cannot be obtained due to being blocked by the snow. In addition, when condensation occurs on the inner surface of the light projecting unit, there may be a problem that the water droplets cannot be evaporated and the required irradiation characteristics cannot be obtained.

JP 2014-127426 A JP 2014-182883 A

  The problem to be solved by the present invention is to detect abnormal states of the lighting control means and the light source, and to continue supplying power to the light source even when the abnormality detection means malfunctions, and to prevent snow melting or condensation by the heating means. It is an object of the present invention to provide a marker lamp device capable of achieving the above.

  The marker lamp device according to the embodiment includes a first saturable unit to which constant current power is input; a light source having a light emitting element; and an output of the first saturable unit to control lighting of the light source. Means; second saturable means having an input section connected in series with the input section of the first saturable means; and monitoring the state of the light source or the lighting control means, and at all times the second saturable means. An abnormality detecting means for closing between the output sections of the means and opening between the output sections of the second saturable means when an abnormal condition is detected; connected in series between the output sections of the second saturable means; And heating means.

  According to the present invention, since the second saturable means is saturated when the lighting control means or the light source is abnormal, the output change of the constant current power supply device is caused to improve the abnormality detection accuracy of the lighting control means or the light source. Can do. Further, even when the abnormality detecting means malfunctions, the light source can be continuously turned on, and the function of the marker lamp device can be continued. Furthermore, by connecting the heating means in series between the output portions of the second saturable means, it is possible to prevent snow melting or condensation.

The circuit diagram which shows one Embodiment of the direct current | flow load control apparatus and marker lamp apparatus of this invention. The wave form diagram similarly explaining an effect | action.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a circuit diagram showing an embodiment of a DC load control device and a marker lamp device of the present invention, and FIG. 2 is a waveform diagram for explaining the operation.

  Reference numeral 10 denotes a constant current power supply device, and a plurality of first saturable means 20 are connected in series on the output side of the constant current power supply device 10. A second saturable means 30 is connected in series corresponding to each of the first saturable means 20. In the present embodiment, the second saturable means 30 has a larger capacity than the first saturable means 20. The first and second saturable means 20 and 30 are, for example, insulating transformers, but are non-insulating transformers, semiconductor devices configured to be electrically connected by applying a voltage higher than a predetermined voltage value, and the like. May be. In the present invention, a device that conducts in a low impedance state (substantially including zero) when a voltage value equal to or higher than a predetermined value is applied is defined as a saturable device.

  The constant current power supply device 10 in the present embodiment is, for example, a phase control type, and includes a pair of thyristors connected in parallel with opposite polarities, and a phase control device 11 that performs phase control on the output voltage of a commercial frequency sine wave AC power supply e. The conduction phase control device 12 that controls the conduction phase of the phase control device 11 is mainly configured. For example, a five-stage dimming command signal S is input to the conduction phase control device 12.

  The constant current power supply device 10 is provided in series with the output transformer 13, the current detection device 14 for current feedback control, the inductor 15 that bypasses the phase control device 11 and passes a small current, and the phase control device 11. The inductor 16 etc. which relieve | moderate the electric current rise at the time of the conduction | electrical_connection of the phase control apparatus 11 is also provided.

  The constant current power supply device 10 is not limited to the phase control type described above, and may be of another type. For example, an inverter or the like may be used to output a sine wave having a frequency as low as the commercial frequency. In this case, the inverter switching means may be controlled to achieve a constant current.

  The first saturable means 20 can supply power to the load 40. The load 40 of this embodiment constitutes a part of the marker lamp device 50 and has a current transformer 41 to which the output of the first saturable means 20 is supplied. Then, the output of the current transformer 41 is input to the lighting control means 42, and the light sources 43 and 43 are controlled to be lighted by the output of the lighting control means 42. The light sources 43 and 43 are solid light emitting elements such as LEDs, organic ELs, and semiconductor lasers, and are connected in series with each other. And each light source 43 and 43 is accommodated in the lamp body 51 and 51 of the marker lamp as a case. The load 40 includes second and third current transformers 44 and 45 provided in series with the current transformer 41.

  The lighting control means 42 has a rectifier 421 for inputting the output of the current transformer 41, and a switching means 422 provided on the output side of the rectifier 421 for controlling the output. A smoothing capacitor 424 is provided on the output side of the switching means 422 via a backflow prevention diode 423.

  Moreover, the lighting control means 42 is configured to be able to change the power supplied to the light sources 43 and 43. In this embodiment, for example, a field effect transistor which is switching means 425 connected in series with the light sources 43 and 43 is provided between both ends of the smoothing capacitor 424.

  Further, the lighting control means 42 has voltage stabilization means for making the output of the smoothing capacitor 424 constant. This voltage stabilization means mainly comprises the switching means 422 and a voltage detection device 426 that detects the voltage across the smoothing capacitor 424.

  Then, according to the detection result of the voltage detection device 426, the conduction of the switching device 422 is controlled by a control device 427, which will be described later, and the output voltage of the smoothing capacitor 424 is made constant.

  The control device 427 corresponds to the output current of the constant current power supply device 10 (corresponding to the luminous intensity ratio of 100%, 25%, 5%, 1%, 0.2%, 0%, the output current is 6. 6A, 5.2A, 4.1A, 3.4A, 2.8A, 2.0A) to control the switching means 425. In this embodiment, the switching means 425 is subjected to pulse width control (PWM). In the case where the light sources 43 and 43 are LEDs, the output currents are 5.0A and 4A corresponding to the luminous intensity ratios of 100%, 25%, 5%, 1%, 0.2%, and 0%, respectively. The output current of the constant current power supply device 10 may be controlled so as to be .5A, 4.0A, 3.5A, 3.0A, 2.0A.

  The output current signal for detecting the output current of the constant current power supply device 10 can be obtained from an execution value, an average value, a conduction phase, or the like according to the type or output waveform of the constant current power supply device 10. The output level indicated by the output current of the power supply device 10 is detected. The current detection means 428 for detecting the output current signal of the constant current power supply device 10 is provided on the output side of the third current transformer 45 in FIG. The output current signal of the current detection means 428 is input to the control device 427.

  Then, the control device 427 controls the switching means 422 to reduce the current in accordance with the input output current signal, and makes the switching means 425 the light output of the light sources 43 and 43 in accordance with the output current signal. PWM is controlled. For example, the control device 427 turns on and off the switching units 422 and 425 at a high frequency (for example, between several hundred Hz to several tens of MHz) in one cycle (T) of the PWM signal (for example, several hundred Hz to several tens of kHz). The time ratio of the high frequency on / off operation period (t) for outputting a signal to be controlled is controlled. Thereby, while controlling the charge amount of the smoothing capacitor 424, the amount of power supplied to the solid state light emitting devices 43 and 43 is changed to change the light output.

  Such a control device 427 is preferably composed mainly of a microcomputer or IC in terms of small size and light weight. When the microcomputer is mainly configured, conversion data is stored or calculated so that the supply current amount-light output characteristic of the light sources 43 and 43 matches the supply current amount-light output characteristic of the bulb. Is easy. However, the present invention is not limited to these.

  Further, feedback control means may be added as the lighting control means 42 of the present embodiment. For example, the current flowing through the light sources 43 and 43 is detected, and the high frequency on / off operation period (t) of the switching means 425 or the frequency of the high frequency on / off so that the current becomes a predetermined current compared with a reference value corresponding to the dimming degree, The on-duty may be changed. As a result, the current actually flowing through the light sources 43 and 43 can be controlled according to the degree of dimming, and the light output can be made constant with high accuracy.

  On the output side of the second current transformer 44, power supply means 429 including a rectifier, a voltage stabilization circuit, and the like is provided to supply power to required means such as the control device 427.

  The abnormality detection means 60 monitors the state of at least one of the lighting control means 42, the light sources 43 and 43, and the lamps 51 and 51, and closes the output section of the second saturable means 30 when normal. Sometimes, the output part of the second saturable means 30 is opened. In the present embodiment, the detection unit 61 that detects the current flowing through the light sources 43 and 43, the control device 427 that inputs the detection signal of the detection unit 61 and determines whether the detection signal is within a predetermined range, and the control device 427 Opening / closing means 62 for opening / closing between the output portions of the second saturable means 30 according to the determination result is provided.

  As the detection means 61, the voltage across the light sources 43 and 43, the light output, the output current and voltage of the lighting control means 42, the temperature of the lighting control means 42 and the light sources 43 and 43, the air density of the lamps 51 and 51, the water Signals such as presence / absence of penetration, presence / absence of condensation, presence / absence of breakage may be detected. That is, it suffices if the first saturable means 20 can detect abnormalities on the load side such as the lighting control means 42, the light sources 43 and 43, and the lamps 51 and 51. A sensor or the like corresponding to the detection target may be used for detecting the abnormal state, and can be appropriately configured by those skilled in the art.

  The means for determining whether the detection signal is within a predetermined range may be configured by combining electronic components such as an operational amplifier, a comparator, and other semiconductor switches. Moreover, as the opening / closing means 62, a relay, a semiconductor switch means, etc. can be used suitably.

  The DC load control device of FIG. 1 constitutes a marker lamp system in an airport or the like, and the first and second saturable means 20, 30, the load 40 and the abnormality detection means 60 constitute a marker lamp device 50. Yes. In the marker lamp apparatus 50 of FIG. 1, light sources 43 and 43 are accommodated in individual lamps 51 and 51, respectively, to constitute a marker lamp, and other first and second saturable means 20, 30 and a load 40 and An example in which the abnormality detection means 60 is accommodated in a common and separate case (not shown) is shown. For example, a marker lamp including the light source 43 and the lamp body 51 is embedded in a taxiway, a runway, etc., and a separate case containing other means is installed in a handhole or the like. In addition to the case where there are two light sources 43 and lamps 51 with respect to the first saturable means 20, the indicator lamp device 50 may be one or three or more.

  When the abnormality detecting unit 60 detects an abnormal state, the output unit of the second saturable unit 30 is opened. Therefore, the second saturable means 30 repeats the desaturation-saturation state every half cycle of the AC voltage. As a result, distortion occurs in the output waveform of the constant current power supply device 10 and the output changes from the normal one. By detecting this output change with, for example, an abnormality detection device 70 installed in a control room or the like, abnormality detection of the marker lamp device 50 is performed.

  The abnormality detection device 70 of this embodiment is configured to detect an abnormality by inputting the voltage on the output side of the phase control device 11 and the detection signal of the current detection device 14. Any analysis means, comparison means, and the like for determining abnormality may be used.

  A heater 81 is provided in series between the output portions of the second saturable means 30. A heating control means 82 for controlling the heater 81 is provided in parallel with the heater 81. The heating unit 80 includes a heater 81 and a heating control unit 82. Output control (heating control) of the heater 81 is performed by the heating control means 82 in accordance with an instruction from the control device 427. Further, the heating control means 82 is not an essential configuration. When the heating control means 82 is not provided, the opening and closing of the opening / closing means 62 are linked to the turning off and on of the heater 81, respectively.

  For example, during snowfall in winter, the heater 81 is operated to melt snow adhering to a light projection window (not shown) of the marker lamp device 50. Snow is melted by the heat of the heater 81, and light irradiation from a projection window portion and a light outlet portion (not shown) can be effectively maintained. As another form, the heater 81 can be provided so as to heat the inner surface of a light control member (not shown). In this case, dew condensation can be prevented by operating the heater 81 when there is a concern that dew condensation will occur on the inner surface of the light control member.

  Next, the operation of this embodiment will be described.

  For example, if the output for obtaining a desired optical output of 100%, for example, a current of 6.6 A in this embodiment is set to be output from the constant current power supply device 10, the constant current of 6.6 A is It is supplied to each marker lamp device 50 through the first saturable means 20.

  In each marker lamp device 50, the DC voltage output from the rectifier 421 is controlled by the switching means 422, applied to the smoothing capacitor 424, and converted into a predetermined DC voltage. Further, the voltage is fixed to a predetermined voltage value by a constant voltage forming means comprising a switching means 422, a voltage detection device 426 and a control device 427. This DC voltage is supplied to the light sources 43 and 43 via the switching means 425.

  On the other hand, the control device 427 receives the output current signal of the constant current power supply device 10 from the current detection means 428. Since the output current of 6.6 A is output from the constant current power supply device 10, it is recognized that the luminous intensity ratio is 100%, and the control device 427 performs PWM control on the on / off operation period of the switching means 425, For example, a current of 350 mA is supplied to 43 in an effective value. Thereby, the light sources 43 and 43 are lighted with 100% brightness.

  If the lighting control means 42, the light sources 43, 43, etc. are normal, the control device 427 of the abnormality detection means 60 closes the opening / closing means 62, so that the second saturable means 30 can be opened on the output side. There is no constant current. For this reason, changes such as waveform distortion do not occur in the output of the constant current power supply device 10.

  The voltage waveform on the output side of the phase control device 11 input to the abnormality detection device 70 at this time is shown in FIG. The current waveform input from the current detection device 14 is as shown in FIG.

  On the other hand, if the lighting control means 42, the light sources 43, 43, etc. are abnormal, for example, if any one of the solid light emitting elements is opened, the current detection signal of the detection means 61 becomes smaller than the predetermined range. Therefore, the control device 427 opens the opening / closing means 62 and opens the output side of the second saturable means 30.

  Therefore, the second saturable means 30 corresponding to the abnormal marker lamp device 50 is not saturated to a certain voltage value in each half cycle of the constant current power supply device 10, but the voltage value rises. When it reaches the saturation voltage, it conducts rapidly. During this non-saturation and / or conduction, a high voltage is generated in the output waveform of the constant current power supply device 10 or a transient waveform distortion occurs. For example, the voltage waveform on the output side of the phase control device 11 input to the abnormality detection device 70 is as shown in FIG. 2C, and the current waveform input from the current detection device 14 is as shown in FIG. Become. The waveforms shown in FIGS. 2C and 2D are different from the waveforms shown in FIGS. 2A and 2B. Therefore, by detecting this change in output, the abnormality detection device 70 can detect the marker lamp device 50. Can be detected.

  In particular, in this embodiment, since the capacity of the second saturable means 30 is larger than that of the first saturable means 20, the rate of change in the output of the constant current power supply device 10 due to saturation is relatively increased. Thus, the certainty of abnormality detection can be improved. This is effective when the capacity of the first saturable means 20 is reduced by using solid light emitting elements as the light sources 34 and 34.

  Note that after the second saturable means 30 is saturated, a predetermined constant current can be supplied to the other first saturable means 20 and the second saturable means 30 as in the normal state. That is, power supply to the other loads 40 and the marker lamp device 50 can be continued.

  Next, a description will be given of a case where the abnormality detection unit 60 malfunctions due to the influence of vibration due to an external impact or the like, external noise superimposed on the power supply, radio wave noise, or the like. For example, it is assumed that the controller 427 of the abnormality detection means 60 opens the opening / closing means 62 and opens the output section of the second saturable means 30 due to external noise. In this case, as described above, the second saturable means 30 repeats the non-saturated-saturated state every half cycle of the AC voltage, but the first saturable means 20 does not saturate and is always the same. In addition, power is supplied to the load 40 and the marker lamp device 50.

  For this reason, the lighting control unit 42 controls the lighting of the light sources 43 and 43 in accordance with the output current signal from the constant current power supply device 10. Therefore, the function as a marker lamp can be continued.

 On the other hand, the abnormality detection device 70 detects an abnormality by detecting a change in the output of the constant current power supply device 10 accompanying the saturation of the second saturable means 30.

  However, for example, if the malfunction of the abnormality detecting means 60 is eliminated by extinction of the external noise, the output section of the second saturable means 30 is closed again, and the constant current power supply accompanying the saturation of the second saturable means 30 It becomes possible to eliminate the change in the output of the apparatus 10.

  Further, even if the malfunction of the abnormality detecting means 60 cannot be eliminated by the disappearance of the noise, the malfunction may be eliminated by temporarily shutting off and turning on the constant current power supply device 10 again.

  Such a malfunction can be solved because power is continuously supplied to the load 40 (or power can be re-supplied), and is difficult when power supply to the load 40 is stopped.

  In the case of a true abnormality such as the opening of the light sources 34, 34, the abnormality detection operation accompanying the desaturation-saturation of the second saturable means 30 is continued until the failed load 40 or the marker lamp device 50 is repaired. Is done.

  Next, the operational relationship between the abnormality detection means 60 and the heating means 80 will be described.

  When the opening / closing means 62 is closed and the heating control means 82 instructs to heat the heater 81, the heat released from the heater 81 prevents snow melting or condensation. On the other hand, when the abnormality detection means 60 detects an abnormal state, the opening / closing means 62 is opened, so that the heating of the heater 81 is stopped regardless of an instruction from the control device 427 to the heating control means 82.

  In addition, by providing a temperature sensor (not shown) and inputting the temperature detection result to the control device 427 or the heating control means 82, heating of the heater 81 can be stopped when the inside and outside of the marker lamp device 50 are at a high temperature. .

  Next, the effect of this embodiment will be described.

  Since the second saturable means 30 is saturated when the lighting control means 42 or the light source 43 is abnormal, an output change of the constant current power supply device 10 is caused to improve the abnormality detection accuracy of the lighting control means 42 or the light source 43. Can do. Further, even when the abnormality detection means 60 malfunctions, the light source 43 can be continuously turned on, and the function of the marker lamp device 50 can be continued. Furthermore, by connecting the heating means 80 in series between the output portions of the second saturable means 30, it is possible to prevent snow melting or condensation.

  By connecting the heating means 80 in series between the output portions of the second saturable means 30, it is possible to prevent snow melting or condensation without causing waste in equipment capacity.

  Further, by inputting the temperature signal of the temperature sensor to the control device 427 or the heating control means 82, the heating of the heater 81 can be stopped when the inside and outside of the marker lamp device 50 are at a high temperature. And excessive heating when the luminous intensity ratio is 100% or the like can be prevented.

  Although several embodiments of the present invention have been described, these embodiments or examples are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments or examples can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments or examples and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 20 ... 1st saturable means 30 ... 2nd saturable means 42 ... Lighting control means 43 ... Light source 50 ... Mark lamp apparatus 60 ... Abnormality detection means 80 ... Heating means

Claims (2)

First saturable means for receiving constant current power;
A light source having a light emitting element;
Lighting control means for inputting the output of the first saturable means and controlling the lighting of the light source;
Second saturable means having an input connected in series with the input of the first saturable means;
The state of the light source or the lighting control means is monitored, the output section of the second saturable means is normally closed, and the output section of the second saturable means is opened when an abnormal state is detected. An anomaly detection means;
Heating means connected in series between the outputs of the second saturable means;
A marker lamp device comprising: A constant current power supply;
A marker lamp device according to claim 1;
A sign lamp system characterized by comprising:

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