JP2011255691A - Portable luminous quantity determining device of led blinking light-emitting machine for railroad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a performance check tool of an LED blinking light-emitting machine for a railroad, which can simply determine the lifetime and replacement time of a red LED and/or a cylinder made of a transparent resin, provided in the LED blinking light-emitting machine installed, for example, beside a track or near a signal.SOLUTION: An opening of a hood-like housing H having a CCD 13 provided on a bottom abuts on a light-emitting surface 2 of the LED blinking light-emitting machine; red blinking light from an array of the red LED 5 of the LED blinking light-emitting machine for the railroad is received by the CCD 13; the luminous quantity of the red blinking light for a fixed period of time is computed; a level is determined by comparing a computed value with two high and low thresholds; and any one of red, yellow and green colors is displayed depending on the low, medium or high level by an LED display device. A measurement operator can determine the replacement time of a substrate 3A with the array of the red LED 5 and the cylinder 2 made of the transparent resin by recognizing a luminous quantity deterioration level and a life level, associated with the performance of the LED blinking light-emitting machine, from the color.

Description

  INDUSTRIAL APPLICABILITY The present invention can check the performance of a railway LED flashing light emitting device that notifies an emergency by flashing light of a light emitting diode (Light Emitting Diode: “LED”), and is particularly portable. The present invention relates to an excellent light quantity determination apparatus for railway LED flashing light emitters.

In railroads, emergency situations may occur, such as people entering the track when the railroad crossing is interrupted, or cars, bicycles, etc. being unable to exit from the railroad crossing. In such a case, the occurrence of an emergency must be notified to railway personnel such as drivers and station staff in order to stop the running train as soon as possible.
As the notification means, there is an LED blinking light emitting device, and typically, the blinking special signal light emitting device 1 shown in FIG. 6 has been widely used in the railway field. Such a flashing special signal light emitter 1 is arranged beside the railroad track, around a railroad crossing, etc., and is turned on when an emergency switch is pressed in an emergency, and the red LED array 5 of the flashing special signal light emitter 1 is red. The LED blinks to notify the railway personnel of the occurrence of an emergency.

The flashing special signal light emitting device 1 will be described more simply with reference to FIG. The same figure (a), (b), (c) is a front view, a side view, and a horizontal sectional view.
The flashing special signal light emitter 1 is made of a transparent resin that covers and protects the periphery of the substrate 3A with the red LED array 5 that blinks the red LED and the substrate 3A with the red LED array 5 and transmits the red flashing light of the red LED. A cylinder 2 and a conical cap 4 that covers the upper opening of the transparent resin cylinder 2 are included. Usually, the light quantity or luminance of the red flashing light of the flashing special signal light emitter 1 is set so as to be visible from a distance of about 80 m so that the driver can quickly detect an emergency.

JP 2003-182576 A JP 2001-111781 A JP 2005-72767 A

By the way, the LEDs of the red LED array 5 are inherently long-life devices, but the amount of light gradually decreases due to thermal respiration, corrosion of the electrode metal, deterioration of the sealing resin, and other secular changes.
In addition, iron powder, gravel, oil, or the like from train wheels or rails may scatter and collide with the transparent resin cylinder 2 toward the outer surface of the transparent resin cylinder 2. As a result, the resin (acrylic resin, polycarbonate resin, etc.) of the transparent resin cylinder 2 is damaged, so that the light transmittance of the transparent resin cylinder 2 gradually decreases and the visibility deteriorates, and eventually functions as a signal light emitter. It cannot be achieved.
For the above reasons, there is a need to replace the red LED 5 or the transparent resin cylinder 2 at a certain time.

  On the other hand, in the railway field, for example, there is a situation in which it is customary to rely on the work standard of replacing the substrate 3A with the red LED 5 array and the transparent resin cylinder 2 every five years (Patent Document 1, paragraph [ 0009] and [0010]). However, in this case, the red LED array 5 and the transparent resin cylinder 2 may be replaced in spite of the remaining life, which causes unnecessary work costs and component costs.

The inventors determined that the true life of the red LED 5 array 5 and the transparent resin cylinder 2 can be determined by the railway personnel such as station staff, safety / security managers, and measurement workers based on the optical determination results. A simple portable light quantity determination device (performance check tool) for the flashing special signal light emitter 1 that can determine when to replace the provided substrate 3A and / or transparent resin cylinder 2 is not present in the railway field. Focused on.
In other fields, there are devices that determine the lifetime of the LEDs provided in the device (see Patent Documents 2 and 3). However, these devices have excellent portability and can easily reduce the amount of light from a light transmitting member that transmits LED blinking light. It is not intended to be a performance check tool that makes decisions.

  In view of the above, the present invention is a portable light quantity determination that can easily determine the life and replacement time of a red LED and / or a transparent resin cylinder of a railway LED blinking light emitter from the light quantity from the railway LED blinking light emitter. An object is to provide an apparatus.

(Aspect of the Invention)
Hereinafter, embodiments of the present invention will be shown and described. The terms (1), (2), and (3) correspond to claims 1, 2, and 3, respectively.

(1) A hood-like housing comprising an opening that can block outside light while blocking external light, a bottom portion that includes a light amount determination portion, and a cylindrical wall portion, the rail LED blinking light emitting device, and the opening Is a portable light quantity determination device for a railway LED blinking light emitter that determines the light emission quantity of the railway LED blinking light emitter while applying the light to the light emitting surface. A color image sensor that receives red flashing light emitted from the red LED array, a light amount calculation means that obtains a light amount of the red flashing light for a certain period, and the light amount and two threshold values are compared. Comparison determination means for determining whether the light intensity level belongs to one of the large light quantity levels, and LED display means for emitting one of red, yellow or green LEDs corresponding to the light quantity level. Portable light quantity determination device of the serial railway LED blinking light-emitting device.

The “railroad LED flashing light emitter” is typically a flashing special signal light emitter. Although not blinking, the rotary special signal light emitter also determines the light amount by paying attention to one circular light-emitting part among a plurality of locations near the vertex of the polygon. If the device is set, it can be measured in the same manner as if the LED of the flashing special signal light emitter is flashing.
The “hood-shaped housing” is a component that forms the center of the portable light quantity determination device for railway LED flashing light emitters. When the light quantity determination target is a flashing special signal light emitter, A wall end portion along the outer surface of the transparent resin cylinder is provided so that external light can be shielded in a usage mode such as a hood to be attached.

  In this “hood-shaped housing”, the red, yellow and green LEDs of the “LED display means” are arranged so as to be visible to the measurement operator. Accordingly, necessary currents and voltages are applied to the red, yellow, and green LEDs, respectively, so that the measurement operator can be informed of the amount of red LEDs provided in the “railroad LED flashing light emitting device” and the deterioration of the transparent resin cylinder. .

(2) The portable light quantity determination device for a railway LED flashing light emitting device described in the item (1), wherein the casing is fixed to a telescopic rod member.
According to this section, the “hood-shaped housing” in the section (1) is fixed to a monopod-shaped “stretchable rod member” that is used by being screwed to the bottom of the camera when photographing with the camera. Regardless of the length and height of the flashing special light-emitting device, the measurement operator makes the opening side of the housing abut the outer surface of the transparent resin cylinder of the flashing special light-emitting device and Can be determined.

(3) An upper plate with an opening that can be fitted with a circular opening at the top cone apex of the railway LED flashing light emitter, and a notch portion inserted into the lower circumferential portion of the railway LED flashing light emitter. A lower plate with a U-shaped notch, and a U-shaped fixture that is formed in a direction perpendicular to the upper and lower plates and bridges the upper and lower plates; The railway according to (1), wherein the casing is fixed and integrated at a center, and the opening of the casing can be positioned toward the center of the red LED array by the fixture. Portable light quantity judging device for LED flashing light emitter.

  According to this section, the average emission of the red flashing light of the red lens array is made stronger than the “hood-shaped casing” of (1) with respect to the transparent resin tube of the flashing special signal light emitter. It can be positioned and fixed at the center of the position, and even in harsh environments such as ground vibrations, earthquakes, strong winds, etc. caused by train passing, the light amount of red flashing light can be determined in a stable state It can be performed. Further, according to this section, the circular opening of the U-shaped fixture is fitted to the end of the conical cap at the top of the flashing special signal light emitter, and the notch of the fixture is the same. The “hood-like housing” can be easily and firmly attached to the flashing special signal light emitter so as to fit into the cylindrical protrusion at the bottom of the light emitter. Can also demonstrate its portability. The U-shaped fixture is preferably made of a flexible elastic material.

  According to the present invention, a measurement operator can easily determine the life of a red LED and / or a transparent resin cylinder of a railway LED blinking light emitter represented by a blinking special signal light emitter at a railway site. In addition, the measurement operator can clearly grasp the lifetime and replacement period of the red LED and the transparent resin cylinder. Therefore, for example, the apparatus according to the present invention can be used for daily periodic inspection, and the operation of the railway LED flashing light emitter can be maintained at all times, and the notification of the railway LED flashing light emitter can be relied upon whenever an emergency occurs. can do. In addition, since the true life of the LED flashing light emitting device for railways can be grasped, the LED array substrate and / or the transparent resin tube of the LED flashing light emitting device for railways is replaced at a suitable time. Costs and part replacement costs can be reduced.

It is a block diagram which shows roughly the basic composition of the portable light quantity determination apparatus of the LED blinking light-emitting device for railroads concerning this invention. Schematic horizontal sectional view in which the portable light quantity determination device is brought into contact with the railway LED blinking light emitter when the light quantity is determined using the portable light quantity determination device of the railway LED blinking light emitter according to the present invention. It is. It is a flowchart which shows roughly the basic operation | movement of the portable light quantity determination apparatus of the LED blinking light-emitting device for railroads concerning this invention. It is a schematic perspective view which shows the aspect which concerns on 1st Example which uses the portable light quantity determination apparatus which contact | abuts arbitrarily, and determines the lifetime of a blinking special signal light-emitting device. It is a schematic perspective view which shows the aspect which concerns on 2nd Example which determines the lifetime of a blinking special signal light-emitting device using the portable light quantity determination apparatus which fixes and contacts. It is (a) front view, (b) side view, and (c) horizontal sectional view of a flashing special signal light emitter, which is a representative example of a railway LED flashing light emitter.

Hereinafter, an embodiment of the present invention (referred to as “this embodiment”) will be described with reference to the configuration diagram shown in FIG. 1 and the flowchart shown in FIG.
FIG. 1 is a block diagram schematically showing a basic configuration of a portable light quantity determination device 10 for a railway LED flashing light emitter. As can be seen from FIG. 1, the portable light quantity determination device 10 includes a CPU (central processing unit) 12, a color image sensor 13, a red wavelength removal filter 14, a flashing synchronization / light reception processing means 15, a light quantity calculation means 16, a comparison / A life determination means 17, a red yellow green LED display unit 18, and an I / O port 19 are included.
These components are connected to a bus (data bus, address bus) 11 so that necessary data, information, command signals, and the like can be transmitted / received to / from each other as appropriate. Although not shown, it is desirable to use a 006P type battery having a substantially rectangular parallelepiped shape that is excellent in portability and storage property.

The CPU 12 outputs necessary instructions to each component of the portable light quantity determination device 10 between the following means and components, performs transmission / reception of data signals, and performs necessary arithmetic processing, temporary storage processing, etc. Is a central processing unit for executing
The color image sensor 13 is a CCD (Charge Coupled Device) that receives blinking light from the blinking special signal light emitter 1 and acquires a color image.

Next, the light quantity determination flow will be described with reference to FIG.
In the present embodiment, since the colored light of the LED blinking light is red, the color image sensor 13 mainly receives red light. However, in order to shield external light as much as possible, the portions other than the light receiving portion of the color image sensor 13 are covered with a hood-shaped light shielding hood H (step S1).

  The red wavelength removal filter 14 removes light other than the red wavelength and receives only red light when external light that cannot be blocked by the light shielding hood H enters the light receiving surface of the color image sensor 13 together with red light. Is a light filter that allows you to get.

The blinking synchronization / light reception processing means 15 follows the timing chart (time axis) based on the clock frequency of the CPU 12 and the timer function (time axis) and passes through the color image sensor 13 and the red wavelength removal filter 14 for a certain period of red light quantity. Is acquired (step S2).
The light quantity calculation unit 16 is a calculation unit that obtains a light quantity per unit time by dividing the light quantity acquired by the blinking synchronization / light reception processing unit 15 by the predetermined period.
The comparison / determination unit 17 compares the light amount per unit time obtained by the light amount calculation unit 16 with two threshold values described below (step S4), and compares and determines the light amount of the red LED array 3. (Step S5).

  The two threshold values are, first, the maximum amount of light (per unit time) when the flashing light from the red LED array 3 is transmitted through the transparent resin cylinder 2 in the initial state, and the maximum value is from 0 to the maximum value. The values of any two points in the range up to (here, V1 and V2) are defined.

Furthermore, the method of determining the threshold value at two points is as follows, for example.
When the initial state (new) railway LED flashing light emitter emits light at the rated voltage, the light intensity per unit time is the maximum value. Further, when the light is emitted at a voltage corresponding to 75% of the rated voltage, the light amount per unit time is set as V2, and when the light is emitted at a voltage corresponding to 50% of the rated voltage, the light per unit time is determined. The amount of light is determined as V1.

  If two threshold values are defined in this way, the range can be divided into three regions, 0 to V1, V1 to V2, and V2 to the maximum value. The three regions correspond to the order of the light quantity from the blinking light from the red LED array 3 in the order of small, medium, and large. Therefore, the three areas are the first area indicating that the lifetime has been exhausted, the second area indicating that the lifetime has been exhausted, and the replacement time for the red LED array 3 and / or the transparent resin cylinder 2. The third region indicates that the lifetime is still remaining. In this manner, the portable light quantity determination device can be used as a portable device and a performance check tool for determining the life of the blinking special signal light emitter 1 as a railway LED blinking light emitter (see FIGS. 4 and 5). Reference numerals 100 and 101).

  When the light quantity is equal to or substantially equal to the threshold values V1 and V2, it is desirable to replace the red LED array 3 and / or the transparent resin cylinder 2 at an early stage in view of safety, so the light quantity and the threshold value V1 are equal. It is preferable that the red LED is displayed at the time, and the yellow LED is displayed when the light amount is equal to the threshold value V2.

Replacement of the red LED array 3 and / or the transparent resin cylinder 2 is performed as follows. The red LED array 3 has a long side along the vertical direction as shown in FIGS. 6 (a) and 6 (b). It is arranged on one side (light emitting surface side) of a vertically long rectangular substrate 3A, and further, the red LED array 3 is entirely covered with a transparent resin to prevent the red LED 5 from falling off and waterproof, and is integrated with the substrate 3A. Has been. Therefore, when it is determined that the red LED array 3 has a lifetime, the entire rectangular substrate 3A integrated with the red LED array 3 is replaced instead of replacing the red LEDs 5 individually.

  As shown in FIGS. 2 and 6C, the transparent resin cylinder 2 covers the entire substrate 3A integrated with the red LED array at a constant interval. Therefore, after removing the cap 4, the transparent resin cylinder 2 is removed so as to be pulled upward, and a new one is fitted and exchanged from above to below so as not to collide with the substrate 3A.

When the portable light quantity determination device 10 displays the red LED 5 of the red-yellow-green LED display unit 18 and the blinking special signal light emitter 1 is determined to have a lifetime, either the red LED array 5 or the transparent resin cylinder 2 is selected. Each time, it is determined whether or not to be exchanged first or simultaneously.
For example, there is a frequency with which iron powder generated by rubbing a train wheel and rail, natural objects such as gravel and stone around the rail, oil from the train, dust, etc. are scattered and collide with the transparent resin cylinder 2. In a high environment, it is considered that the transparent resin cylinder 2 is easily soiled and easily damaged. If dirt is attached to the transparent resin cylinder 2, it can be cleaned and removed, but if there is strong dirt or deep scratches that reduce visibility, the transparent resin cylinder 2 is completely new. Replace with.

  In order to determine whether or not the red LED array 3 should be replaced, it is possible to temporarily replace it with a new one of the transparent resin cylinder 2 or to determine the portable light quantity without attaching the transparent resin cylinder 2. The amount of light is determined using the apparatus 10. For example, when the red LED of the red yellow green LED display unit 18 is displayed, it is determined that the life of the red LED array 3 is reached, and the red LED array 3 is replaced. Since the red LED array 3 is integrated with the substrate 3A as described above, the cap 4 is removed, and the entire 3A formed with the red LED array 3 is replaced with a completely new one. On the other hand, when the green LED of the red yellow green LED display unit 18 is displayed, it is determined that the lifetime of the transparent resin cylinder 2 still remains and the red LED array 3 need not be replaced.

  Further, although not shown, the portable light quantity determination device 10 of the railway LED flashing light emitter may be provided with a storage device having a certain capacity. In this storage device, data such as determination result, light quantity at the time of life determination, life period, installation location (area) of railway LED blinking light emitting device, humidity, temperature, time, etc. when passing the train are stored, and the data is stored. It can be used as reference data when resetting the threshold values V1 and V2, or can be used for data such as performance improvement of the red LED array 3 and material improvement of the transparent resin cylinder 2. In light of the light weight, portability, and power saving of the portable light quantity determination device 10 for railway LED flashing light emitters, the storage device is a thin, light and short size such as a USB (Universal Serial Bus) memory, an SD card (registered trademark), etc. It is desirable to use those.

Further, the I / O port 19 shown in FIG. 1 can be used as an interface between the portable light amount determination device 10 and a PC (Personal Computer) (not shown), and between the portable light amount determination device 10 and the PC. Various types of data can be transmitted.
Then, database processing software is installed in advance, and the acquired information and data are stored and stored in a storage device (not shown) such as a hard disk drive or SDHC (SD High Capacity) in the PC.

The portable light quantity determination device 10 is connected via a wireless means (not shown) such as a wireless LAN or BLUE TOOTH (registered trademark) or a wired means (not shown) such as a LAN cable via the I / O port 19. Can also be connected to a PC.

  As the database processing software, for example, Excel (registered trademark) or Access (registered trademark) of Microsoft (registered trademark) may be used. By using such database processing software, you can visualize the change in the amount of light of railway LED flashing light emitters over time and the relationship between their life and various data in a graph, or statistically process large volumes of data And the like can be analyzed. The obtained graphs and analysis results contribute to optimization of the threshold values V1 and V2 of the portable light quantity determination device 10, further improvement of the device 10, and research and development.

  A first embodiment and a second embodiment of the portable light quantity determination device 10 (FIG. 1) of the flashing flashing special signal light emitter 1 (railroad LED flashing light emitter) will be described below. It is to be noted that the devices according to the two embodiments are referred to as a light amount determination device 100 of a type that abuts arbitrarily and a light amount determination device 101 of a type that abuts fixedly.

[First embodiment]
FIG. 4 is a schematic perspective view showing a usage pattern of the light quantity determination device 100. As shown in FIG. 4, the light quantity determination device 100 is configured to blink the special signal light emitter 1 while a hood-shaped shading hood H is brought into contact with the outer surface of the transparent resin tube 2 of the flashing special signal light emitter 1. The amount of red flashing light emitted from the light is determined.

  As shown in FIG. 4, the light quantity determination device 100 has a light shielding hood H fixed to the end of a monopod-like extendable rod-like member 100 </ b> B used for camera photography, and the light quantity determination place is high. It can respond to any cases. The light shielding hood H is the same as that described in the above embodiment, and a red, yellow, and green LED display is provided on a position excellent in visibility for a measurement operator, that is, on the lower surface (the surface facing the ground surface) of the light shielding hood H. The part 18 is arranged.

  According to the light quantity determination device 100 according to the first embodiment, the light-blocking hood H blinks while being applied to any place from the upper part to the lower part of the cylindrical outer surface of the transparent resin cylinder 2 of the blinking special signal light emitter 1. The amount of red flashing light emitted from the special signal light emitter 1 or the deterioration of the transparent resin cylinder, and the life of the flashing special signal light emitter 1 can be easily determined. Further, the light quantity determination and the life determination can be easily performed regardless of the height and length of the flashing special signal light emitter 1.

[Second embodiment]
FIG. 5 is a schematic perspective view of the light amount determination apparatus 101.
As shown in FIG. 5, the light quantity determination device 100 is provided with a light-shielding device on the positioning fixture 101 </ b> F so as to be positioned at the center height of the outer peripheral surface of the transparent resin tube 2 of the flashing special signal light emitter 1. The hood H is fixed and integrated, and the light quantity and life at a constant position are determined at all times.

As shown in FIG. 5, the positioning fixture 101F includes an upper flat portion 102 having a circular opening 101G into which the top 4 of the conical cap of the flashing special signal light emitter 1 can be fitted, and a flashing special signal. A U-shaped notch 101U that can be fitted to the circumferential lower portion 4 of the light emitter 1 is defined as a lower flat portion 103, and is bridged perpendicularly to the upper and lower flat portions 102 and 103, and the outer surface of the transparent resin cylinder 2 The long bridge portion 101F is disposed along the long direction. In the center of the long bridge portion 101F, the light shielding hood H is positioned and arranged with the wall end portion of the light shielding hood H in close contact with the outer peripheral surface of the transparent resin cylinder 2 (see FIG. 2).
Also in the second embodiment, it is desirable to arrange the red, yellow and green LED display unit 18 on a position where the measurement operator has good visibility, for example, on the lower surface (the surface facing the ground surface) or the lateral surface of the light shielding hood H.

  According to the second embodiment, since the position of the light shielding hood H is always fixed at the center of the flashing special signal light emitter 1, even in a severe measurement environment such as when a train is vibrated or an earthquake occurs, or during a strong wind. The light quantity can be determined stably at all times. That is, in a severe measurement environment, a determination error due to shaking of the measurement operator's hand or arm (FIG. 4; reference symbol M) does not occur.

[Modification]
The present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made by those skilled in the art without departing from the gist of the present invention.

For example, in the present specification, the railway LED blinking light emitter 1 has been described as a representative example of a blinking special signal light emitter, but a railway LED blinking light emitter capable of determining the life by the apparatus according to the present invention is included in this. It is not limited.
For example, the present invention is used for the flashing special signal light emitter 1 as a representative example of the light quantity determination target, but can also be applied to a rotary special signal light emitter. If this apparatus is positioned and arranged at a predetermined position where a plurality of circular signals of the rotary special signal light emitter pass, it can be regarded as a determination device for the amount of emitted light that blinks at every rotation cycle. In such a case, it is somewhat difficult to block outside light. However, it may be preferably supplemented separately with a filter for blocking outside light.

  In the case where the transparent resin cylinder 2 is not cylindrical, but is made of a transparent resin having other shapes such as a rectangular cross section and an elliptical cross section, the light shielding hood H extends along the outer peripheral surface of the rectangular cross section and the elliptical cross section. Provide end faces that make intimate contact.

Moreover, although the LED for blinking light of the blinking special signal light emitter 1 emits a red color representing a typical emergency, LEDs of other colors can be used instead. In that case, a filter that removes wavelengths other than those of other colors may be used instead of the filter 14 except for the red wavelength.

Further, although two threshold values V1 and V2 are defined, it is possible to further subdivide the light amount determination level or the life determination level by defining three or more threshold values. In this case, a light-transmissive color cap is added so that LEDs of colors other than red, yellow, and green are further added, or the white LED sealing resin (transparent housing) is divided into three or more colors. It may be covered.

1: Railway LED flashing light emitter (flashing special signal light emitter), H: housing, H 2 _O : opening, Hb: bottom, H _W : cylindrical wall, 5: red LED array, 13: color image sensor 16: light quantity calculation means, 17: comparison judgment means, 18: LED display means, 100, 101: portable light quantity judgment device.

Claims (3)

A hood-like housing comprising an opening that can block outside light while blocking external light, a bottom portion including a light amount determination unit, and a cylindrical wall portion, and emitting light to the opening. A portable light quantity determination device for a railway LED blinking light emitter that determines the light emission amount of the railway LED blinking light emitter while being applied to a surface,
The light quantity determination unit includes a color image sensor that receives red blinking light emitted from a red LED array of the railway LED blinking light emitter, a light quantity calculation unit that obtains a light quantity of the red blinking light for a certain period, and the light quantity And a comparison determination means for determining whether the light intensity level belongs to a small, medium, or large light amount level, and a red, yellow, or green LED corresponding to the light amount level. LED display means for emitting light;
A portable light quantity determination device for the railway LED flashing light emitting device.   The portable light amount determination device for the railway LED flashing light emitting device according to claim 1, wherein the casing is fixed to a telescopic rod member. An upper plate with an opening that can be fitted with a circular opening at the top conical vertex of the railway LED flashing light emitter, and a notch can be inserted into the lower circumferential portion of the railway LED flashing light emitter. A U-shaped fixture comprising a lower plate with a letter-shaped notch and a bridge portion formed in a direction perpendicular to the upper and lower plates and bridging the upper and lower plates;
2. The housing is fixed and integrated at the center of the bridge portion, and the opening of the housing can be positioned toward the center of the red LED array by the fixture. A portable light quantity determination device for the railway LED flashing light emitter.

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