EP1276353A1 - Lampenzustandsdetektor und lampenzustandsüberwachungseinrichtung mit einem solchen detektor - Google Patents

Lampenzustandsdetektor und lampenzustandsüberwachungseinrichtung mit einem solchen detektor Download PDF

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Publication number
EP1276353A1
EP1276353A1 EP99959886A EP99959886A EP1276353A1 EP 1276353 A1 EP1276353 A1 EP 1276353A1 EP 99959886 A EP99959886 A EP 99959886A EP 99959886 A EP99959886 A EP 99959886A EP 1276353 A1 EP1276353 A1 EP 1276353A1
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EP
European Patent Office
Prior art keywords
lamp
illuminance
exchange
light
measured
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Application number
EP99959886A
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English (en)
French (fr)
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EP1276353A4 (de
Inventor
Satoshi Power & Ind. Systems R & D Lab. OKADA
Setsuo Power & Ind. Systems R & D Lab. ARITA
Masaji Omika Ind. Systems Prod. Div. NAKAHARA
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Hitachi Ltd
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Hitachi Ltd
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Publication of EP1276353A1 publication Critical patent/EP1276353A1/de
Publication of EP1276353A4 publication Critical patent/EP1276353A4/de
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection

Definitions

  • the present invention relates to a lamp state detector for detecting the states of a large number of lamps installed in airports, expressways or the like and a lamp state monitoring apparatus employing the same.
  • the apparatus for monitoring the state of the halogen lamp As an example of the apparatus for monitoring the state of the halogen lamp, the apparatus wherein in order to prevent previously the breaking of the filament in the halogen lamp, the value of the current which is caused to flow through the filament of the halogen lamp is measured, and when the value of the measured current has exceeded the setting value which is previously set, an operator is warned of that the breaking of the filament will occur in a short time is described in JP-A-62-249393 (hereinafter, referred to as "a first prior art" for short, when applicable).
  • JP-A-60-250593 JP-A-60-250593 (hereinafter, referred to as "a second prior art" for short, when applicable) that the illuminance of the lamp is measured, and the reduction of the illuminance of the lamp is detected by comparing the measured illuminance of the lamp with the setting value which is previously set, and also an operator is informed of the time when exchanging the lamp on the basis of the measured illuminance of the lamp.
  • the time at which the old lamp is exchanged for a new one is reported on the basis of the illuminance which has been measured. Therefore, in the case where the illuminance of the lamp has been abruptly reduced due to the breaking of the filament, it is difficult to report the time when exchanging the lamp before the illuminance of the lamp has become equal to or lower than the necessary illuminance. In other words, since the illuminance has been abruptly reduced in the breaking of the filament, if the exchange time is reported from a time point when the illuminance begins actually to be reduced, the illuminance of the lamp may have already been reduced to the level equal to or lower than the necessary illuminance before carrying out the exchange of the lamp in some cases.
  • the exchange of the lamp may not be carried out before the illuminance of the lamp has become the necessary illuminance in some cases.
  • An object of the present invention is to provide a lamp state detector which is capable of judging the time when the lamp should be exchanged before the illuminance of the lamp has become equal to or lower than the necessary illuminance for both of the reduction of the illuminance of the lamp due to the blackening of the lamp and the reduction of the illuminance of the lamp due to the breaking of the filament, and a lamp state monitoring apparatus employing the same.
  • the present invention may provide measuring the illuminance of the light which has been emitted from a lamp and also a resistance value of the lamp to judge on the basis of the illuminance and the resistance value which have been measured whether or not the exchange of the lamp is required.
  • the degradation of the filament is detected on the basis of the resistance value, which has been measured, before the filament has undergone the breaking of the core, whereby it is possible to judge the time when the lamp should be exchanged before the illuminance of the lamp has become equal to or lower than the necessary illuminance.
  • the time when the lamp should be exchanged for a new one before the illuminance of the lamp has become equal to or lower than the necessary illuminance it is possible to judge the time when the lamp should be exchanged for a new one before the illuminance of the lamp has become equal to or lower than the necessary illuminance.
  • Fig. 1 is a block diagram showing a configuration of a lamp state monitoring apparatus as a preferred embodiment of the present invention
  • Fig. 2 is a block diagram,showing a configuration of a lamp state detector 5a shown in Fig. 1
  • Fig. 3 is a graphical representation showing the relation between the lighting accumulating total time and the resistance ratio
  • Fig. 4 is a diagram showing an example of the display in a display panel 91 of a lamp state display device 9 shown in Fig. 1
  • Fig. 5 is a cross sectional view showing the structure of a chassis 51 in which a lamp 6a, an illumination photometer 7a and the like shown in Fig. 1 are all accommodated
  • Fig. 1 is a block diagram showing a configuration of a lamp state monitoring apparatus as a preferred embodiment of the present invention
  • Fig. 2 is a block diagram,showing a configuration of a lamp state detector 5a shown in Fig. 1
  • Fig. 3 is a graphical representation showing the relation between the lighting accumul
  • FIG. 6 is a block diagram showing a configuration of a lamp state monitoring apparatus as another embodiment of the present invention
  • Fig. 7 is a block diagram showing a configuration of a lamp state detector 5a shown in Fig. 6
  • Fig. 8 is a graphical representation showing the relation between the current flowing through a lamp and the lighting accumulating total time
  • Fig. 9 is a graphical representation showing the relation between the rated current lighting time and the lamplight filament breaking probability
  • Fig. 10 is a diagram showing an example of the display in the display panel 91 of the lamp state display device 9 shown in Fig. 6
  • Fig. 11 is a cross sectional view showing the structure of the chassis 51 in which the lamp 6a, the illumination photometer 3a and the like shown in Fig. 6 are all accommodated
  • Fig. 12 is an enlarged view showing the illumination photometer 7a shown in Fig. 11 and the vicinity thereof
  • Fig. 13 is a top view when the inside of the chassis 51 is viewed from the upper side.
  • Fig. 1 shows a lamp state monitoring apparatus as a preferred embodiment of the present invention.
  • the lamp state monitoring apparatus of the present embodiment is the apparatus for monitoring the states of a large number of halogen lamps (hereinafter, referred to as "lamps" for short, when applicable) which are installed in the passages or the like for the aircrafts in an airport.
  • lamps halogen lamps
  • a constant current source 1 supplies the A.C. current to a plurality of communication controllers 4a to 4n through a power line and transformers 3a to 3n.
  • the communication controllers 4a to 4n utilize as their power source a part of the A.C. current supplied thereto and also output the remaining A.C. current to lamp state detectors 5a to 5n which are electrically connected thereto, respectively.
  • Fig. 2 shows a configuration of the lamp state detector 5a.
  • the A.C. current which has been outputted from the communication controller 4a is inputted to an input terminal a of a power source switching unit 501 in the lamp state detector 5a to be outputted to a lamp 6a through an output terminal c of the lamp state switching unit 501.
  • the lamp 6a emits the light by supplying the A.C. current thereto.
  • a part of the A.C. current which has been outputted from the communication controller 4a is supplied to a battery 502 to charge the battery 502 with the electric charges.
  • an ammeter 503 measures the effective value of the A.C. current which is caused to flow through the lamp 6a to output the current effective value I thus measured to a resistance calculating unit 505, a degradation judging unit 506 and an illuminance reduction judging unit 508.
  • a voltmeter 504 measures the effective value of the A.C. voltage which is applied across the lamp 6a to output the voltage effective value V thus measured to the resistance calculating unit 505.
  • the resistance calculating unit 505 obtains the resistance value R of the lamp 6a on the basis of both of the current effective value I and the voltage effective value V which have been inputted thereto. In this connection, the resistance value R can be obtained on the basis of (Expression 1).
  • R V/I
  • the resistance calculating unit 505 outputs the resistance value R which has been obtained on the basis of (Expression 1) to the degradation judging unit 506. In such a way, since the resistance value of the lamp 6a is measured by the ammeter 503, the voltmeter 504 and the resistance calculating unit 505, those constituent elements may also be called collectively the resistance measuring device.
  • the degradation judging unit 506 in order to judge the time when the lamp should be exchanged before the filament has undergone the breaking, judges the degradation state of the filament of the lamp 6a on the basis of the current effective value I and the resistance value R, and the reference current value I0 and the reference resistance value R0 which have been outputted from a reference value setting unit 510.
  • the reference resistance value R0 is the resistance value of the lamp 6a which is obtained when the current having the reference current value I0 is caused to flow through the lamp 6a in which the filament is not yet degraded at all, and the method of setting the reference current value I0 and the reference resistance value R0 in the reference value setting unit 510 will be described later.
  • the degradation judging unit 506, as the judgement of the degradation of the filament substitutes the values of the current effective value I, the resistance value R, the reference current value I0 and the reference resistance value R0 into (Expression 2) to confirm that (Expression 2) is established.
  • the ratio of the value, when the current having the reference current value I0 is caused to flow through the lamp 6a, which is obtained by changing the resistance value R thereinto to the reference resistance value R0 (hereinafter, referred to as "the resistance ratio" for short, when applicable) is calculated, and ⁇ 1 in the right side of (Expression 2) is the degradation judgement barometer.
  • Fig. 3 is a graphical representation showing the relation between the lighting accumulating total time of the lamp and the resistance ratio.
  • Fig. 3 shows the case where at a time point when the lighting accumulating total time has reached about 910[hr], the filament of the lamp undergoes the breaking of the core.
  • the resistance ratio is about 1.0, and thereafter, the resistance ratio is gradually increased until the filament undergoes the breaking.
  • the phenomenon that the resistance ratio is gradually increased in such a way results from that the filament of the lamp has the property in which the resistance of the filament is gradually increased along with the degradation of the filament. Then, at a time point when the lighting accumulating total time has reached about 910[hr] (at a time point when the resistance ratio has become 1.1), the filament of the lamp undergoes the breaking in the end and hence the resistance ratio becomes infinity. This phenomenon results from that the breaking of the filament of the lamp makes the resistance value infinity. In such a way, the resistance ratio of the lamp is held at 1.0 for about 600[hr] from a time point when starting the lighting, i.e., when the filament of the lamp is in the sound state.
  • the resistance ratio is gradually increased to 1.1 along with the progress of the degradation of the filament to undergo the breaking of the filament in the end to become infinity.
  • the degradation judgement barometer ⁇ 1 is set to 1.02 which is the value of the resistance ratio in the initial stage of the degradation of the filament.
  • the degradation judging unit 506 when the value of the left side of (Expression 2) has exceeded 1.02 as the degradation judgement barometer ⁇ 1, i.e., when (Expression 2) is established, judges that the filament of the lamp 6a has been degraded. In other words, in the case where the value, when the current having the reference current value I0 is caused to flow through the lamp 6a, which is obtained by changing the resistance value R thereinto has become larger than the reference resistance value R0 by 2%, the degradation judging unit 506 judges that the filament of the lamp 6a has been degraded. In such a way, in the present embodiment, the degradation judgement for the filament of the lamp is carried out by utilizing the phenomenon that the resistance value of the filament is increased as the filament of the lamp is further degraded.
  • the degradation judging unit 506 when (Expression 2) is established, outputs "1", while when (Expression 2) is not established, outputs "0". That is, the degradation judgement unit 506, when the filament of the lamp 6a has been degraded, outputs "1", while when the filament of the lamp 6a has not yet been degraded, outputs "0".
  • the result of the degradation judgement for the filament of the lamp 6a which is made by the degradation judging unit 506 is inputted to an exchange judging unit 509.
  • a photoelectronic device 7a receives the light which has been emitted from the lamp 6a and then outputs the electrical signal corresponding to the number of photons of the light thus emitted to the illumination photometer 507. Then, the illumination photometer 507 obtains the illuminence E of the light, which has been emitted from the lamp 6a, on the basis of the electrical signal which has been outputted from the photoelectronic device 7a and then outputs the information relating to the illuminance E thus obtained to an illuminance reduction judgement unit 508.
  • the photoelectronic device 7a is described separately from the illumination photometer 503, the photoelectronic device and the illuminanation photometer may also be collectively called the illuminanation photometer.
  • the illuminance reduction judging unit 508 on the basis of the current effective value I and the illuminance E which have been inputted thereto, and the reference current value I0 and the reference illuminance E0 which have been outputted from a reference value setting unit 510, judges whether or not the illuminance of the lamp 6a has been reduced to the degree at which the exchange of the lamp is required.
  • the reference illuminance E0 is the illuminance of the light which has been emitted from the lamp 6a when the current having the reference current value I0 is caused to flow through the lamp 6a which is in the state of being still free from the degradation of the filament. Then, the method of setting the reference illuminance E0 in the reference value setting unit 510 will be described later.
  • the illuminance reduction judging unit 508 substitutes the values of the current effective value I, the illuminance E, the reference current value I0 and the reference illuminance E0 into (Expression 3) to confirm whether or not (Expression 3) is established.
  • ⁇ 1 is the illuminance reduction judgement barometer, and is set to 0.5 in the present embodiment.
  • the ratio of the illuminance value when the current having the reference current value I is caused to flow through the lamp 6a, which is obtained by changing the illuminance E thereinto to the reference illuminance E0 (hereinafter, referred to as "the illuminance ratio" for short, when applicable).
  • the illuminance ratio when the illuminance ratio is lower than 0.5, i.e., when (Expression 3) is established, it is judged that the illuminance of the lamp 6a has been reduced down to the degree at which the old lamp needs to be exchanged for a new one.
  • ⁇ 1 0.5
  • the value of the illuminance reduction judgement barometer ⁇ 1 is not limited to 0.5, and hence the value of the illuminance ratio which is suitable for judging that the exchange of the lamp is required may be obtained on the basis of the tests and the like to be set therefor.
  • the exchange judging unit 509 when at least one of the degradation judging unit 506 and the illuminance reduction judging unit 508 has outputted "1”, judges that the exchange of the lamp 6a is required to output "1".
  • the exchange judging unit 509 when both of the degradation judging unit 506 and the illuminance reduction judging unit 508 have outputted "0s”, judges that the exchange of the lamp 6a is not required to output "0".
  • the output of the exchange judging unit 509 is outputted as the output of the lamp state detector 5a to the communication controller 4a. In such a way, since the time when exchanging the lamp 6a is judged by the degradation judging unit 506, the illuminance reduction judging unit 508 and the exchange judging unit 509, those constituent elements may also be collectively called the judgement unit.
  • the lamp state detector 5a judges whether or not the exchange of the lamp 6a is required, and outputs the judgement result thereof to the communication controller 4a.
  • each of other lamp state detectors similarly judges whether or not the exchange of the associated lamp is required and then outputs the judgement result thereof to the associated communication controller.
  • the communication controllers 4a to 4n at the time when "1s" have been outputted from the corresponding lamp state detectors, superimpose the signals exhibiting the identification numbers which are previously set in the corresponding lamps on the A.C. current which is caused to flow through the power line 2. For example, when it is judged in the lamp state detector 5a and the lamp state detector 5n that the exchange of the respective lamps is required, the communication controller 4a superimposes the signal exhibiting the identification number of the lamp 6a on the A.C. current, and the communication controller 4n superimposes the signal exhibiting the identification number of the lamp 6n on the A.C. current.
  • the signals which have been superimposed on the A.C. current are received at a signal receiver 8 through a transformer 3z.
  • the signal receiver 8 from the signals which have been received thereat, decodes the identification number of the lamp which has been judged to be exchanged and then outputs the identification number thus decoded to a lamp state display unit 9.
  • the power line carrying technology wherein in such a way, the information is transmitted with the signals superimposed on the A.C. current flowing through the power line is the technology which is the already known technology, the detailed description with respect to the transmission/reception of the signals is omitted here for the sake of simplicity.
  • the power line carrying technology is, for example, described in JP-A-10-92588.
  • the information (the identification number) of the lamp which has been judged to be exchanged for a new one is transmitted by utilizing the power line over which the current is to be supplied to each of the lamps, there is no necessity to provide specially the signal line for the information transmission, and hence it is possible to realize the monitoring of the states of the lamps at the low cost.
  • the lamp state display unit 9 on the basis of the identification numbers which have been inputted thereto, displays any of the lamps which have been judged to be exchanged for new ones on the display panel.
  • Fig. 4 shows an example of the display in a display panel 91 of the lamp state display unit 9. As shown in the figure, in the display panel 91, the lamps are divided every system to be displayed in the form of the circles, respectively.
  • the circle corresponding to the lamp which has been judged to be exchanged for a new one (hereinafter, referred to as "the exchange required lamp” for short, when applicable), and the circle corresponding to the lamp for which it has been judged that the exchange thereof is not required (hereinafter, referred to as “the exchange unrequired lamp” for short, when applicable) are displayed with the different colors.
  • the exchange required lamp is displayed with the red circle
  • the exchange unrequired lamp is displayed with the blue circle.
  • the system name of the system having the exchange required lamp(s) is displayed with the color different from that of the system name of the system which is constituted by only the exchange unrequired lamps.
  • the system having the exchange required lamp(s) and the numbers of the lamps in the system of interest are displayed on an exchange required lamp display column 92 which is specially provided. Since any of the lamps for which the exchange is required is displayed in such a way, an observer can recognize readily any of the lamps for which the exchange is required and hence can exchange at once any of the lamps, for which the exchange is required, for new ones.
  • the battery 502 is always held in the state of being charged with the electric charges by the A.C. current which is supplied through the communication controller 4a.
  • the output current of the battery 502 is adjusted in such a way that at the time when having electrically connected to the lamp 6a, the value of the current which is outputted from the battery 502 becomes the preset value (the reference current value I0).
  • the reference current value I0 any of the values may be set as long as it is enough to light the lamp.
  • the resistance value R which has been calculated in the resistance calculating unit 506 and the illuminance E which has been measured in the illumination photometer are respectively set as the reference resistance value R0 and the reference illuminance E0 in the reference value setting unit 510.
  • the reference current value I0 is previously set in the reference value setting unit 510.
  • the reference value setting unit 510 at the time when the setting of the reference values has been completed, outputs the switching signal to the power source switching unit 501. At the time when having received the switching signal, the power source switching unit 501 switches the input terminal b from the input terminal a.
  • the reference resistance value R0 and the reference illuminance E0 are both set in the reference value setting unit 510.
  • Fig. 5 is a cross sectional view showing the structure of a chassis in which the transformer 3a, the communication controller 4a, the lamp state detector 5a, the lamp 6a and the photoelectronic device 7a of the present embodiment are all accommodated.
  • the transformer 3a, the communication controller 4a, the lamp state detector 5a, the lamp 6a and the photoelectronic device 7a are all accommodated in the chassis 51 which is embedded in the earth of the passage or the like for the aircrafts.
  • the chassis 51 Within the chassis 51, the light which has been emitted from the lamp 6a is collected to an optical filter 53 by a reflecting mirror 52.
  • the optical filter 53 transmits therethrough only the light having a predetermined wavelength (color) of the light thus collected thereto, while reflects the light having other wavelengths (colors).
  • the light which has been transmitted through the optical filter 53 (hereinafter, referred to as "the transmitted light” for short, when applicable) is then transmitted through a tempered glass 54 to be emitted to the outside of the chassis 51.
  • the photoelectronic device 7a is arranged between the lamp 6a and the optical filter 53. Then, the light which has been reflected by the optical filter 53 (hereinafter, referred to as the reflected light for short, when applicable) is condensed by a condenser lens 55. The photoelectronic device 7a receives effectively the condensed light.
  • the illumination photometer 507 of the lamp state detector 5a on the basis of the number of photons of the light which has been received by the photoelectronic device 7a (the reflected light), the illuminance of the transmitted light.
  • the reason that the illuminance of the transmitted light is obtained on the basis of the number of photons of the reflected light in the present embodiment is as follows.
  • the photoelectronic device In the case where the number of photons of the transmitted light is directly measured, the photoelectronic device needs to be arranged on the optical path of the transmitted light which has been transmitted through the optical filter 53, and as a result there arises the problem that the photo-electronic device can not but block off the transmitted light. Then, in the present embodiment, the illuminance of the transmitted light will be obtained on the basis of the number of photons of the reflected light which has not been emitted to the outside of the chassis 51 at all. By adopting this method, the illuminance of the transmitted light can be measured with the simple structure without blocking off the transmitted light at all.
  • the degradation judgement and the illuminance reduction judgement for the filament are carried out on the basis of the resistance values and the illuminance of the lamps 6a to 6n which have been respectively measured in the lamp state detectors 5a to 5n and when it is judged on the basis of at least one of them that the lamp of interest should be exchanged for a new one, it is judged that the lamp of interest should be exchanged for a new one.
  • the time when exchanging the lamp can be judged before the illuminance of the lamp of interest has become equal to or lower than the necessary illuminance. As a result, the conduction for the aircrafts can be surely carried out.
  • the constant current source is employed as the power source for supplying the electric power to the lamps 6a to 6n
  • the constant voltage source may also be employed.
  • Fig. 6 shows a configuration of the lamp state monitoring apparatus of the present embodiment
  • Fig. 7 shows a configuration of a lamp state detector 5a' of the present embodiment.
  • the A.C. current which is caused to flow through the power line 2 is supplied to the lamp 6a through the transformer 3a and the lamp state detector 5a'.
  • the ammeter 503 measures the current effective value I as the effective value of the D.C.
  • the voltmeter 504 measures the voltage effective value V as the effective value of the A.C. voltage which is applied across the lamp 6a and then outputs the voltage effective value V thus measured to the degradation judging unit 506'.
  • a rated value storage unit 513 stores therein previously a rated current value In, a rated voltage value Vn and a rated illuminance En which are set as the specification of the lamp 6a and outputs the rated current value In and the rated voltage value Vn out of them to the degradation judging unit 506' and also outputs the rated current value In and the rated illuminance En out of them to the illuminance reduction judging unit 508'.
  • the degradation judging unit 506' substitutes the current effective value I, the voltage effective value V, the rated current value In and the rated voltage value Vn which have been inputted thereto into (Expression 4) to confirm whether or not (Expression 4) is established.
  • ⁇ 2 is the degradation judgement barometer and is set to 1.08 in the present embodiment.
  • the left side of (Expression 4) represents the ratio of the voltage value, when the current having the rated current value In is caused to flow through the lamp 6a, which is obtained by changing the voltage effective value V thereinto to the rated voltage value Vn (hereinafter, referred to as "the voltage ratio" for short, when applicable).
  • the voltage ratio exceeds 1.08, i.e., when (Expression 4) is established, it is judged that the filament of the lamp 6a has already been degraded.
  • the degradation judgement barometer ⁇ 2 1.08 is employed as the degradation judgement barometer, it is to be understood that the value of the degradation judgement barometer ⁇ 2 is not limited to 1.08, but the value of the voltage ratio which is suitable for exchanging the lamp before the filament of the lamp has undergone the breaking may be obtained on the basis of the tests and the like to be set.
  • the degradation judgement unit 506' when (Expression 4) is established, outputs "1", while when (Expression 4) is not established, outputs "0". That is, the degradation judging unit 506', when the filament of the lamp 6a has already been degraded, outputs "1", while the filament of the lamp 6a is not yet degraded, outputs "0".
  • the voltage ratio and the value of the degradation judgement barometer ⁇ 2, and the result of the degradation judgement for the filament which have been obtained by the degradation judging unit 506' are inputted as the output of the lamp state detector 5a' to the modem 10a.
  • the current effective value I, the rated current value In and the rated illuminance En are all inputted to the illuminance reduction judgeing unit 508', and in addition thereto, the illuminance E which has been measured by the illumination photometer 507 is inputted to the illuminance reduction judgeing unit 508'. Then, the illuminance reduction judgeing unit 508' substitutes the values of the current effective value I, the illuminance E, the rated current value In and the rated illuminance En which have been inputted thereto into (Expression 5) to confirm whether or not (Expression 5) is established.
  • ⁇ 1 represents the illuminance reduction judgement barometer and is set to 0.5 in the present embodiment similarly to the embodiment 1.
  • the left side of (Expression 5) represents the ratio of the illuminance, when the current having the rated current value In is caused to flow through the lamp 6a, which is obtained by changing the illuminance E thereinto to the rated illuminance E0 (hereinafter, referred to as "the illuminance ratio" for short, when applicable).
  • the illuminance ratio when the illuminance ratio has become lower than 0.5, i. e, when (Expression 5) is established, it is judged that the illuminance of the lamp 6a has been reduced to the degree at which the lamp needs to be exchanged.
  • the illuminance reduction judging unit 508' when (Expression 5) is established, outputs "1", while when (Expression 5) is not established, outputs "0". That is, the illuminance reduction judging unit 508', when the illuminance of the lamp 6a has been reduced down to the degree at which the exchange of the lamp is required, outputs "1", while when the illuminance of the lamp 6a has not yet been reduced down to the degree at which the exchange of the lamp is required, outputs "0".
  • the illuminance ratio and the value of the illuminance reduction judgement barometer ⁇ 1 are inputted as the output of the lamp state detector 5a' to the modem 10a.
  • a reset switch 511 At the time when the exchange of the lamp 6a has been carried out, is pressed down by a worker. At the time when the reset switch 511 has been pressed down, the reset signal is inputted to the life estimating unit 512. Then, the life estimating unit 512, from a time point when the reset signal has been inputted thereto, calculates the lighting accumulating total time of the lamp 6a. The procedure thereof will hereinbelow be described in detail.
  • the life estimating unit 512 at the time when the reset signal has been inputted thereto, stores therein the current effective value I at that time point (e.g., 4[A]), and also starts to count a time. Then, the life estimating unit 512 compares the current effective value I (4[A]) thus stored therein with the new current effective value I which has been outputted from the ammeter 503 and continues to count a time until the current effective value I which has been outputted from the ammeter 503 changes from 4[A].
  • the life estimating unit 512 stores therein a time (e.g., 100[hr]) which has been counted until that time point and then counts a time until the current effective value I changes from 5[A]. In such a way, the life estimating unit 512 obtains both of the current effective value I and the time for which the current having that value is caused to flow through the lamp 6a, and stores therein the current effective value I and the time with the current effective value I and the time made correspond to each other.
  • a time e.g., 100[hr]
  • the life estimating unit 512 on the basis of the current effective value I and the time t which have been stored therein with the current effective value I and the time t made correspond to each other, changes the time t into the time tn in the case where the rated current value In is caused to flow through the lamp 6a (the rated current lighting time).
  • Fig. 8 is a graphical representation showing the relation between the effective value of the current which is caused to flow through the lamp and the lighting accumulating total time.
  • the life estimating unit 512 carries out the change of the time on the basis of the graph shown in Fig. 8. For example, when the current of 4[A] is caused to flow through the lamp for a time of 100[hr], if that time, from the graph 4 of Fig.
  • the life judging unit 512 accumulates the time tn thus obtained as the time for which the rated current value In is caused to flow through the lamp, i.e., as the rated current lighting time.
  • Fig. 9 is a graphical representation showing the relation between the rated current lighting time tn and the lamplight filament breaking probability.
  • the life estimating unit 512 obtains the lamplight filament breaking probability from the rated current lighting time tn to judge whether or not the lamplight filament breaking probability thus obtained exceeds 80[%] as the setting threshold.
  • the life estimating unit 512 judges that the probability that the lamp will undergo the breaking of the filament is high, i.e., the lamp is nearly dead to output "1".
  • the life estimating unit 512 judges that the probability that the lamp will undergo the breaking of the filament is low to output "0".
  • the lamplight filament breaking probability which has been obtained by the life estimating unit 512, the setting threshold and the result of the life judgement are outputted as the output of the lamp state detector 5a' to the modem 10a.
  • the modems 10a to 10n transmit the information which has been outputted from the lamp state detectors 8a' to 5n', together with the identification numbers of the corresponding lamps, to the modem 10z over the signal dedicated line 11.
  • the modem 10z outputs the information of the lamps which has been transmitted from the modems 10a to 10n, with the information of the lamps made correspond to the identification numbers of the lamps, to the lamp state display unit 9.
  • the amount of transmitable information can be increased as compared with the case where the power line carrier is employed.
  • Fig. 10 is a diagram showing an example of the display in the display panel 91 of the lamp state display unit 9. Points of the present embodiment different from the embodiment 1 are that any of the lamps which have been judged to be nearly dead is displayed, and that a lamp state parameter display unit 93 is provided.
  • the lamp is displayed in the form of the circle every system.
  • the circle corresponding to the exchange required lamp, the circle corresponding to the exchange unrequired lamp, and the circle corresponding to the lamp which has been judged to be nearly dead are respectively displayed with the different colors.
  • the exchange required lamp is displayed in the form of the red circle
  • the exchange unrequired lamp is displayed in the form of the blue circle
  • the nearly dead lamp is displayed in the form of the yellow circle.
  • what lamps the circles show is displayed on a display column 93.
  • the display panel 91 has a lamp state parameter display column 94, and the system name and the lamp number in the system of interest are both displayed on the lamp state parameter display column 94, and also the system name and the lamp number can be changed by manipulating buttons 95 and 96, which are provided in such a way as to correspond thereto, by an observer.
  • the voltage ratio (the left side of (Expression 4)
  • the illuminance ratio (the left side of (Expression 5)
  • the lamplight filament breaking probability are displayed together with the respective thresholds on the lamp state parameter display column 94.
  • the setting threshold for the voltage ratio is meant the degradation judgement barometer ⁇ 2
  • the setting threshold for the illuminance ratio is meant the illuminance reduction judgement barometer ⁇ 1.
  • the reason that the exchange is required may also be displayed by the expression of "the lamp blackening" or "the filament degradation".
  • Fig. 11 is a cross sectional view showing the structure of the chassis in which the transformer 3a, the lamp state detector 5a', the lamp 6a, the photoelectronic device 7a and the modem 10a in the present embodiment are all accommodated.
  • the photoelectronic device 7a since if the photoelectronic device is arranged on the optical path of the transmitted light which has been transmitted through the optical filter 53, then the light will be blocked off, in the embodiment 1, the photoelectronic device 7a was arranged between the lamp 6a and the optical filter 53, whereas in the present embodiment, the movable photoelectronic device 7a is arranged on the optical path of the transmitted light.
  • the movable photoelectronic device 7a will hereinbelow be described.
  • Fig. 12 is an enlarged view showing the vicinity of the movable photoelectronic device 7a (the area A in Fig. 11).
  • the photoelectronic device 7a for detecting the number of photons is installed on a rotor 121 of a ultrasonic motor.
  • the rotor 121 of the ultrasonic motor is installed on a stator 122 of the ultrasonic motor.
  • the detected value in the photoelectronic device 7a is transmitted to a contact 123 to be inputted to the lamp state detector 5a'. Then, the motion of the ultrasonic motor will hereinbelow be described in detail with reference to Fig. 13.
  • Fig. 13 is a top view when the inside of the chassis 51 shown in Fig.
  • the photoelectronic device 7a is installed on the rotor 121 of the ultrasonic motor.
  • reference numeral 131 designates the position of the photoelectronic device 7a during the standby of the measurement
  • reference numeral 132 designates the position of the photoelectronic device 7a during the measurement. Then, when the photoelectronic device 7a is located at the position 132, since the photoelectronic device 7a is positioned on the optical path and also comes in contact with the contact 123, the electrical signal corresponding to the number of photons of the light which has been emitted from the lamp 6a is inputted to the lamp state detector 5a'.
  • the movable photoelectronic device 7a which is constructed in such a way that the movable photoelectronic device 7a is moved between the position 132 located on the optical path of the transmitted light and the position 131 located out of the optical path of the transmitted light, when the number of photons is not measured, the photoelectronic device 7a is positioned out of the optical path of the transmitted light, while only when the number of photons is measured, the photoelectronic device 7a can be arranged on the optical path of the transmitted light.
  • the interrupt of the transmitted light can be suppressed to a short time period and hence the measurement of the illuminance can be carried out without impeding the conduction of the aircrafts.
  • the timing of measuring the number of photons for example, either may be made when the current effective value I is changed, or may be instructed on the basis of the manual by an observer.
  • the ultrasonic motor is the known technology, the detailed description with respect to the construction and the like thereof is omitted here for the sake of simplicity.
  • the description has been given with respect to the case where the ultrasonic motor is utilized, alternatively, the more general electromagnetic motor or the like may also be utilized.
  • the degradation judgement for the filament and the reduction judgement for the illuminance based on the voltage value of the lamp 6a are carried out, for both of the illuminance reduction of the lamp due to the blackening of the lamp and the illuminance reduction of the lamp due to the breaking of the filament, it is possible to judge the time when exchanging the lamp before the illuminance of the lamp has become equal to or lower than the necessary illuminance. Therefore, it is possible to carry out the conduction of the aircrafts.
  • the lamplight filament breaking probability is presented to an observer, an observer can estimate how long the lamp will undergo the breaking of the filament and hence the plan of exchanging the lamp can be readily laid.
  • the constant current source has been employed as the power source for supplying the electric power to the lamps 6a to 6n
  • the constant voltage source may also be employed. But, in this case, the degradation of the filament of the lamp is judged on the basis of the current which is caused to flow through the lamp.
  • the present embodiment is different in the points of 1 ⁇ to 5 ⁇ from the embodiment 1, it is to be understood that even if all of the points 1 ⁇ to 5 ⁇ are not changed for the embodiment 1, the present embodiment is established as the lamp state monitoring apparatus even with the configuration in which the points of 2 ⁇ and 4 ⁇ are changed or even with the configuration in which only the point 5 ⁇ is changed.
  • the configurations of the various combinations there are conceivable the configurations of the various combinations.
  • the present invention can be applied to the lamp as long as it is the lamp in which the illuminance is reduced due to either the blackening or the degradation of the filament similarly to the halogen lamp.
  • the lamp state detector for carrying out the degradation judgement and the illuminance reduction judgement for the filament is provided for each of a plurality of lamps
  • the lamp state detectors can also be integrated with one another. That is, only the measurement devices such as the ammeter, the voltmeter and the photoelectronic device are provided in each of the lamps. Then, after the measured values obtained from the measurement devices have been collectively inputted into one computer, the state of each of the lamps may also be judged in the computer of interest.
  • the description will hereinbelow be given with respect to the method of installing the lamp state monitoring apparatus as described above. While when installing the lamp state monitoring apparatus, it is conceivable that the overall system is newly installed, in the case where the lamps are already installed, other configuration may be added thereto.
  • the change may be carried out in which the communication controllers 4a to 4n, the lamp state detectors 5a to 5n, the photoelectronic devices 7a to 7n, the signal receiver 8 and the lamp state display unit 9 are newly provided.
  • the change may be carried out in which the lamp state detectors 5a' to 5n', the photoelectronic devices 7a to 7n, the lamp state display unit 9, the modems 10a to 10n, 10z and the signal dedicated line 11 are newly provided.
  • the present invention can be applied to the state monitoring of a large number of lamps which are installed in the airports, the expressways or the like.
  • the exchange of the lamp in the airports, the expressways or the like can be carried out before the illuminance of the lamp has been reduced down to the level equal to or lower than the necessary illuminance.
EP99959886A 1999-12-17 1999-12-17 Lampenzustandsdetektor und lampenzustandsüberwachungseinrichtung mit einem solchen detektor Withdrawn EP1276353A4 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1999/007110 WO2001045472A1 (fr) 1999-12-17 1999-12-17 Detecteur d'etat de lampe et controleur d'etat de lampe faisant intervenir ledit detecteur

Publications (2)

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EP1276353A1 true EP1276353A1 (de) 2003-01-15
EP1276353A4 EP1276353A4 (de) 2003-03-26

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EP (1) EP1276353A4 (de)
JP (1) JP4032741B2 (de)
CN (1) CN1335044A (de)
WO (1) WO2001045472A1 (de)

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Publication number Priority date Publication date Assignee Title
JP4922838B2 (ja) * 2007-05-31 2012-04-25 日本オーチス・エレベータ株式会社 蛍光灯異常検出装置
JP2011180997A (ja) * 2010-03-03 2011-09-15 Nec Corp 水門の警報監視装置、水門の警報監視方法、プログラム
KR101610660B1 (ko) * 2014-10-21 2016-04-08 (주)디노솔루션 할로겐 램프 수명 측정 장치
EP3095709B1 (de) * 2015-05-20 2018-01-10 Goodrich Lighting Systems GmbH Flugzeugaussenbeleuchtungsvorrichtung
JP6620523B2 (ja) * 2015-11-10 2019-12-18 コニカミノルタ株式会社 画像形成装置
CN111443300B (zh) * 2020-03-25 2022-08-16 北京北方华创微电子装备有限公司 卤素灯的检测方法、装置及设备

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JPH04174997A (ja) * 1990-11-08 1992-06-23 Toshiba Corp 灯火断芯検出装置
JPH04290971A (ja) * 1991-03-19 1992-10-15 Hitachi Ltd 空港滑走路灯火断芯検出装置
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JPH02239595A (ja) * 1989-03-14 1990-09-21 Hitachi Ltd 空港灯火装置及び該装置用の個別電源装置
JPH04174997A (ja) * 1990-11-08 1992-06-23 Toshiba Corp 灯火断芯検出装置
JPH04290971A (ja) * 1991-03-19 1992-10-15 Hitachi Ltd 空港滑走路灯火断芯検出装置
JPH04298990A (ja) * 1991-03-27 1992-10-22 Toshiba Corp 灯火断芯検出装置

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See also references of WO0145472A1 *

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CN1335044A (zh) 2002-02-06
EP1276353A4 (de) 2003-03-26
WO2001045472A1 (fr) 2001-06-21
JP4032741B2 (ja) 2008-01-16

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