JP2023063802A - On-site photometer - Google Patents

Abstract

To provide a portable on-site photometer capable of measuring luminous intensity of a flashlamp at a site equipped with the flashlight.SOLUTION: An on-site photometer consisting of a photometry unit 2 and a control unit 30 is provided, the photometry unit 2 being configured to be attached to a light exit surface of a flashlamp 80 installed at a site such as an airport to measure illuminance of light emitted from a light source 95 of the flashlamp 80, transmit measurement data to the control unit 30, and compare the measurement data with reference data to perform abnormality diagnosis of the light source 95 of the flashlamp 80.SELECTED DRAWING: Figure 5

Description

FIELD OF THE INVENTION The present invention relates to field photometers.

2. Description of the Related Art Conventionally, at an airport or the like, a plurality of flashing lights have been installed on a runway in order to guide landing aircraft to the runway (see Patent Document 1). A flash lamp using a light-emitting element such as an LED is also known (see Patent Document 2).

JP 2010-182495 A JP 2007-137187 A

Flashlights installed on airport runways, etc., especially flashlights that use light-emitting elements such as LEDs, tend to attenuate from the initial value with use, so it is necessary to periodically check the luminosity. . However, in order to confirm the light intensity, it was necessary to remove the flashlight installed at the site, carry it to a measurement room where the light intensity measuring device was installed, and measure the light intensity there.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an on-site photometer capable of performing photometric measurements at a site where a flashlight is installed.

To achieve the above object, the on-site photometer of the present invention comprises a photometer and a controller. and transmits measurement data of the illuminance to the control unit, and the control unit receives the measurement data transmitted from the light intensity measurement unit, compares it with reference data, and determines the The flash lamp is diagnosed as abnormal when there is a certain deviation between the measured data and the reference data.

According to the present invention, by using a portable on-site photometer, it is possible to measure the light intensity of a flashlight with a simple setting at the site where the flashlight is installed. The inspection can be performed in a short period of time without the need for inspection, and the work load on the inspector can be reduced.

FIG. 1 is a perspective view of the photometric unit of Embodiment 1 as seen from the rear side. FIG. 2 is a perspective view showing a control unit according to the first embodiment; 3 is a perspective view showing the configuration of the flash lamp of Embodiment 1. FIG. FIG. 4 is a perspective view showing a combined state of the light intensity measuring unit and the flash lamp of Embodiment 1. FIG. 5 is a cross-sectional perspective view showing a combined state of the light intensity measuring unit and the flash lamp of Embodiment 1. FIG. 6 is a front view of the control unit of the first embodiment; FIG. FIG. 7 is a partial schematic diagram showing a combined state of the light intensity measuring unit and the flash lamp.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the on-site photometer of the present invention will be described in detail with reference to the drawings. However, the invention is not limited to the following description. Further, in FIGS. 1 to 7 below, the same reference numerals are given to the same members.

Here, the relationship between luminous intensity and illuminance will be described. Luminous intensity refers to the luminous flux (amount of light) per unit solid angle in a certain direction, and expresses the intensity of light in each direction. The units are cd (candela) and lm/sr (sr: steradian). When the luminous intensity is 1000 cd, the illuminance directly below the irradiation distance of 1 m is 1000 lx (lux).

Illuminance is the amount of luminous flux incident per unit area, and represents the degree of brightness of a surface illuminated by a light source. The calculation formula is E (illuminance)=C (luminous intensity)/D ² , and the distance from the light source is D (m). The unit is lx (lux).

The on-site photometer of this embodiment evaluates the emission function of the flash lamp 80 on the basis of the luminous intensity, which is an objective indicator of the emission capability of the flash lamp 80 .
The light intensity is measured by placing the illuminometer 20 at a certain distance from the flash lamp 80 and measuring the illuminance of the light emitted from the flash lamp 80 . By converting the measured illuminance into luminous intensity using the fact that the luminous intensity and the illuminance have a certain correlation as described above, abnormality diagnosis such as aged deterioration of the luminous intensity of the flash lamp 80 is performed.

The on-site photometric device of the present invention comprises a photometric unit that can be combined with a flash lamp, and a control unit. Also, the flashlight to be measured by the on-site photometer of the present invention has a reflector and a light source composed of an LED. The light source is basically arranged at the bottom of the reflector, and the mounting surface of the LED mounted on the substrate faces the opening (light exit port) on the light exit side of the reflector.

Although the on-site photometer of the present invention is designed for use with a light source composed of an LED, it may be used to measure the photointensity of a flashlight using other lamps, such as a flashlight using a xenon lamp.
Also, the on-site photometric device of the present invention is a on-site photometric device for flashlights used for aircraft landing guidance, but is not limited to this.

[Embodiment 1]
First, an example of a flash lamp whose luminous intensity is to be measured by the on-site luminous intensity measuring device used in this embodiment will be described.
FIG. 3 is a perspective view showing the configuration of a flash lamp to be measured by the on-site photometer of this embodiment.

As shown in FIG. 3, the flashlight 80 has a housing 82, a light transmissive cover 85, a reflector 90, and a light source 95 consisting of a plurality of LEDs. The reflector 90 and the light source 95 are housed inside the housing 82 .

A light transmissive cover 85 is arranged on the opening side of the reflector 90 . A ring-shaped annular portion 88 is provided on the edge of the front side of the light transmissive cover 85 so as to cover the opening (light exit) of the housing 82, and near the top of the annular portion 88, A clamp 98 is provided for detachably combining with the photometric unit 2 . In addition, the ring portion 88 is provided with a plurality of attachment members 96 for fixing the ring portion 88 to the housing 82 . A plurality of clamps 98 may be arranged around the annular portion 88 .

The flashlight 80 of this embodiment includes an arm 100 and a leg portion 110, and is installed on the ground of a runway or the like at the site by the leg portion 110. FIG.

The light source 95 of the flash lamp 80 is composed of an LED substrate (not shown) on which a plurality of LEDs are mounted in a matrix. The luminous intensity of the light emitted from the flash lamp 80 can be set appropriately. Further, the light source 95 may have a plurality of LEDs mounted on an LED substrate in rows, rings, or radially. Moreover, as for the plurality of LEDs, in addition to white LEDs, LEDs of a plurality of colors such as blue LEDs, red LEDs, and green LEDs may be mixed and used.

In FIG. 3, the reflector 90 is a member that is arranged in the direction in which the light source 95 emits light, reflects the light emitted from the light source 95 in the light emission direction, and emits the light to the outside through the light transmissive cover 85. .

The reflector 90 has an inner wall made of a glossy surface with high reflection efficiency and has a hemispherical shape expanding from the light source 95 toward the opening (light exit) of the housing 82 . The reflector 90 may have a hemispherical shape or a conical shape that provides an effective reflection effect.

The light transmissive cover 85 is a member that transmits light emitted from inside the housing 82 . A material for forming the light-transmitting cover 85 is glass, epoxy resin, or the like, which is capable of transmitting light emitted from the light source 95, but is not limited to these.

For example, the light-transmissive cover 85 of the flashlight 80 installed at an airport has a diameter of 15 to 29 cm, for example.

When the flashlights 80 of this embodiment are installed in a large airport having a plurality of runways, about 8 to 29 lights are installed at intervals of about 30m from the approach direction of the aircraft toward the end of the runway. Furthermore, in the case of flashlights 80 installed at airports where aircraft cannot approach the runway in a straight line, they are installed at key points on the approach road to the runway, for example, every several kilometers.

FIG. 1 is a perspective view of the photometric unit 2 of this embodiment as seen from the rear side. As shown in the figure, the photometric unit 2 is covered with a protective cover 5 having a substantially rectangular parallelepiped shape. The protective cover 5 covers the periphery of the integrating sphere 10 (see FIG. 5), so that the integrating sphere 10 is deformed by an impact due to the drop of the light intensity measuring unit 2, etc., and the illuminance measurement data changes. A protective cover to prevent errors such as inaccurate illuminance measurements.

As shown in FIG. 1, the protective cover 5 is composed of a back plate 8, a contact plate 16, and side plates 18. As shown in FIG. The protective cover 5 is made of a processed aluminum plate, but other metal materials such as stainless steel plates and steel plates, as well as plastic materials such as ABS and PC (polycarbonate), may be used.

The back plate 8 is formed on the upper surface of the protective cover 5 and is made of a substantially hexagonal plate material obtained by chamfering two corners of a rectangular plate material. A substantially rectangular abutment plate 16 whose four corners are chamfered in an arc shape is disposed substantially parallel to the rear plate 8 so as to face the rear plate 8 . The side plate 18 is arranged between the back plate 8 and the contact plate 16 so as to bridge the back plate 8 and the contact plate 16 . The chamfering of the corners of both the rear plate 8 and the contact plate 16 is arbitrary.

FIG. 2 is a perspective view showing the control section 30 of this embodiment. The control unit 30 is a substantially rectangular parallelepiped housing 32 having portability. A handle 35 is provided on the upper surface of the housing 32, and a display 50 with a touch panel, a temperature display panel 45, and a power supply connector 40 are arranged on the front surface. A power supply connector 40 (not shown) is arranged on the back surface of the housing 32 and connected to the integrating sphere 10 by a power supply cable 60 .

A plurality of mounting legs 33 are provided on the left side of the housing 32 to be used when the control unit 30 is horizontally mounted. In FIG. 2, four mounting legs 33 are arranged in a rectangular shape, but the number and arrangement position are not limited to this.

The housing 32 is made of a processed aluminum plate like the protective cover 5, but other metal materials such as stainless steel plates and steel plates, as well as plastic materials such as ABS and PC (polycarbonate) may be used. good.

Alternatively, instead of the handle 35 provided on the upper surface of the housing 32, or in combination therewith, a shoulder belt may be provided so that it can be carried on the shoulder.

4 is a perspective view showing a combined state of the light intensity measuring section 2 and the flash lamp 80 of the present embodiment, and FIG. 5 is a partially cross-sectional perspective view showing a combined state of the light intensity measuring section 2 and the flash lamp 80 of the first embodiment. FIG. 7 is a partial schematic view showing the combined state of the light intensity measuring unit 2 and the flash lamp 80. As shown in FIG.

The opening of the reflector 90 of the flash lamp 80 shown in FIG. As shown in FIG. 7, the flash lamp 80 and the integrating sphere 10 are detachably combined with their openings aligned.

As shown in FIGS. 4 and 5, the flash lamp 80 and the light intensity measurement unit 2 are connected to each other via the abutment plate 16 of the light intensity measurement unit 2 by a clamp 98 provided near the top of the annular portion 88 of the flash lamp 80. It is mechanically sandwiched and united with the annular portion 88 of the flash lamp 80 . An annular rubber packing (not shown) is installed near the inner circumference of the opening of the contact plate 16 of the light intensity measuring unit 2 . The packing seals the space between the annular portion 88 and the contact plate 16 when the flash lamp 80 and the light intensity measuring unit 2 are combined, and prevents the light emitted from the flash lamp 80 from leaking to the outside and sunlight and rainwater from the outside. play a role in preventing intrusion by
The clamps 98 may be provided not only near the top of the ring portion 88 of the flash lamp 80 but also at a plurality of other portions of the ring portion 88 .

As shown in FIG. 5, the photometric unit 2 has a structure in which a contact plate 16 is fixed to a hemispherical integrating sphere 10 . An integrating sphere-side connector 12 is arranged at the bottom of the hemispherical integrating sphere 10 . A leg portion 27 and a pedestal 28 are installed on the lower surface side of the integrating sphere 10 and fixed to the bottom portion of the protective cover 5 of the optical measuring instrument 2 (not shown). The contact plate 16 , the integrating sphere 10 , the legs 27 and the pedestal 28 are all housed inside the protective cover 5 of the photometric part 2 .

An integrating sphere side connector 12 is installed on the outside of the bottom of the hemispherical integrating sphere 10, and an illuminometer 20 for receiving the light emitted from the flash lamp 80 is arranged on the inside bottom of the integrating sphere 10. ing. Measurement data of the illuminance of the flash lamp 80 measured by the illuminance meter 20 is transmitted to the control unit 30 through the integrating sphere cable 14 detachably connected to the integrating sphere connector 12 .

FIG. 6 is a front view of the controller 30. FIG. As shown in the figure, the control unit 30 has a housing 32, a temperature display panel 45 displaying the measured value of the temperature around the flashlight 80 on the upper right side, and a temperature display panel 45 for power supply on the lower side of the temperature display panel 45. A connector 40 is arranged. The power supply connector 40 is connected to the power supply cable 60 and electrically connected to the flash lamp side connector 92 of the flash lamp 80 . A display 50 with a touch panel for displaying various data and for operating the control unit 30 is arranged on the left side of the control unit 30 .

A power plug 37 is provided on the rear surface of the control unit 30 . The power plug 37 is connected to a power outlet located near the place where the flashlight 80 is installed to supply power to the control section 30 . The supplied power is AC 100V, but other voltages such as AC 200V may be used.

Also, the control unit 30 may be equipped with a battery power supply having a charging function such as a lithium-ion rechargeable battery. By installing a battery power supply, it is possible to perform smooth light intensity measurement even in an environment where there is no power outlet on site.

Next, the outline of the on-site photometer will be explained. The on-site photometric device of this embodiment can measure the photometric intensity without removing the flashlight 80 installed at an airport or the like.

The procedure for preparing the on-site photometer for photometry is as follows.
(1) Attach the photometric unit 2 to the flash lamp 80 and combine them.
(2) Remove the flash lamp lighting cable (not shown) connected to the flash lamp side connector 92 of the flash lamp 80 .
(3) Connect the power supply cable 60 connected to the power supply connector 40 of the control unit 30 to the flash lamp side connector 92 of the flash lamp 80 .
(4) Connect the integrating sphere cable 14 connected to the integrating sphere side connector 12 of the integrating sphere 10 to the measurement connector 44 of the control section 30 .
(5) Plug the power plug 37 of the control unit 30 into a power outlet installed at the site.

As a rule, the working environment for measurement is from 5°C to 35°C. In addition, since the on-site photometer of this embodiment is waterproof, photometry can be performed even in rainy weather. The light intensity is measured by applying a predetermined voltage from the control unit 30 to the light source 95 of the flash lamp 80 and measuring the illuminance of light emitted from the light source 95 with the illuminance meter 20 of the integrating sphere 10 . Measurement data is transmitted to the control unit 30 for each measurement.
The control unit 30 records the illuminance in an unused state (initial state) at an ambient temperature of 25 degrees as reference data according to the types of various integrating spheres. This reference data is the initial value for judging the degree of attenuation of the light source of each flash lamp, and has a unique value for each type of flash lamp.

Next, the procedure for photometric measurement will be described.
(1) Before applying a voltage to the flash lamp 80, a thermometer (not shown) installed in the photometer 2 is used to measure the ambient temperature near the place where the flash lamp 80 is installed.
Next, the illuminance meter 20 installed at the inner bottom of the integrating sphere 10 measures the illuminance when the flash lamp 80 is turned off (when not emitting light), and transmits the measurement data of the local temperature and illuminance to the control unit 30 .
The purpose of measuring the illuminance when the flash lamp 80 and integrating sphere 10 are combined is to grasp in advance the illuminance generated by disturbance such as light entering the spherical body through the gaps of the spherical body when the flash lamp 80 and the integrating sphere 10 are combined. An object of the present invention is to correct measurement data by performing zero point correction of reference data.
(2) The control unit 30 applies five levels of current from a small current to a large current to the LED of the light source 95 located at the bottom of the reflector 90 of the flash lamp 80, and measures the illuminance of the light emitted from the light source 95. Then, the measurement data is loaded into the control unit 30 .
(3) The control unit 30 corrects the illuminance in the reference data and sets a new reference illuminance based on the ambient temperature and the illuminance at the time of turning off, which are the measurement data in (1) above.
Then, an approximate expression representing the relationship between the current applied to the light source 95 and the measured data of the illuminance in (2) above is created and displayed on the touch panel display 50 of the control unit.
(4) Comparing the reference data of the corrected illuminance of the flash lamp measured in advance at a standard temperature of 25° C. with the measurement data of the illuminance of the flash lamp 80 measured on site, and comparing the reference data and the measured data. If there is a certain deviation between them, the flash lamp 80 is diagnosed as abnormal.

Although the present invention has been described with reference to the embodiments, the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

According to the present invention, by using a portable on-site photometer, it is possible to measure the light intensity of a flashlight with a simple setting at the site where the flashlight is installed. The inspection can be performed in a short period of time without the need for inspection, and the work load on the inspector can be reduced.

2 Photometric unit 5 Protective cover 8 Back plate 10 Integrating sphere 11 Edge 12 Integrating sphere side connector 14 Integrating sphere cable 16 Contact plate 18 Side plate 20 Luminometer 27 Leg 28 Pedestal 30 Control unit 32 Housing 33 Mounting leg 35 Handle 37 Power plug 40 Power supply connector 44 Measurement connector 45 Temperature display panel 50 Touch panel display 60 Power supply cable 80 Flash lamp 82 Housing 85 Light transmissive cover 88 Annular portion 90 Reflector 92 Flash lamp side connector 95 Light source 96 Installation Member 98 Clamp 100 Arm 110 Leg

Claims (10)

It consists of a photometric measurement unit and a control unit.
The light intensity measurement unit is detachably combined with a light exit port of a flash lamp installed on site, measures the illuminance of the emitted light of the flash lamp, and transmits the measured illuminance data to the control unit;
The control unit receives the measurement data transmitted from the light intensity measurement unit, compares the measurement data with reference data, and determines that the flash lamp is abnormal when there is a certain deviation between the measurement data and the reference data. An on-site photometer characterized by diagnosing. 2. The on-site photometer according to claim 1, wherein said measurement data further includes measurement data of illuminance when said flash lamp is turned off and measurement data of temperature around said flash lamp. The control unit corrects the illuminance in the reference data based on the measurement data and sets new illuminance reference data,
3. The on-site photometric measurement device according to claim 1, wherein the abnormality diagnosis of the flash lamp is performed based on the corrected reference data. The photometric part comprises an integrating sphere and a protective cover,
The integrating sphere is hemispherical and has an opening at the maximum diameter and an annular edge in the circumferential direction of the opening,
The protective cover has an abutment plate, a rear plate and a side plate,
the contact plate has an opening of substantially the same shape as the opening of the integrating sphere, and is fixed to the edge so as to match the opening of the integrating sphere;
The back plate is arranged to face the contact plate substantially parallel,
4. The side plate according to any one of claims 1 to 3, wherein the side plate is arranged between the back plate and the contact plate so as to bridge the back plate and the contact plate. On-site photometer as described. The flash lamp has a housing, and an annular portion is provided around the opening of the housing,
5. The on-site photometric measurement according to claim 1, wherein the annular portion is provided with a clamp, and the annular portion and the contact plate are detachably united by the clamp. machine. The control unit includes a portable housing having a substantially rectangular parallelepiped shape having a handle on the upper surface,
A display with a touch panel, a temperature display panel, and a power supply connector on the front side,
Equipped with a measurement connector on the back side,
The display with a touch panel displays various data and can operate the control unit,
the temperature display panel displays measurement data of the temperature;
the power supply connector supplies power to the flash lamp through a flash lamp-side connector of the flash lamp and a power supply cable;
6. The field photometer according to claim 1, wherein the integrating sphere-side connector of the integrating sphere transmits the measurement data to the measurement connector via an integrating sphere cable. The light intensity measurement unit includes an illuminometer,
The illuminance meter is arranged at the bottom of the integrating sphere and is electrically connected to the measurement connector of the control unit via an integrating sphere cable connected to the integrating sphere-side connector arranged at the bottom,
measuring the illuminance of the light emitted from the flash lamp and transmitting measurement data of the illuminance to the control unit;
7. The on-site photometer according to claim 1, wherein the display with a touch panel displays control data transmitted from the control unit. 8. The on-site photometer according to claim 1, wherein the photometer and the controller are waterproof. 9. The on-site photometer according to claim 1, wherein the controller includes a battery capable of driving the flash lamp, the photometer, and the controller. 10. The on-site photometer according to any one of claims 1 to 9, wherein the on-site photometer is used as a flashlight for aircraft landing guidance.

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