JPS5880518A - Display device for snowfall depth - Google Patents

Abstract

PURPOSE:To simplify maintenance of a titled display device by inputting light from a light source to plural dots through controllers for selecting and controlling optical fibers and optical switches and digitally displaying signals outputted from a snowfall meter by ultrasonic waves as dots. CONSTITUTION:A titled device is provided with a front board 1, optical fibers 3-1-3-n, light generator 4, light source, reflecting body 6, electric source 7, and optical switches 8-1-8-n. A controlling circuit 9 for selecting individual dots selects and controls the optical switches 8-1-8-n. The controlling circuit 9 selects and controls the optical switches 8-1-8-n by a snowfall depth measuring signal outputted from a snowfall meter 10 measuring snowfall depth from the difference between the reflecting time of an ultrasonic pulse from a road surface and that from the surface of snow to display snowfall depth as dots.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a snow depth display device suitable for digitally displaying, for example, the depth of snow accumulated on a road surface.

In winter, knowing the depth of snow on the road surface is extremely important not only for road administrators but also for drivers.This invention is suitable for such a confirmation method. The present invention proposes a snow depth display device that is easy to maintain, and will be explained using the following figures.

Figure 1 shows the basic concept of this invention, (■)
(3) is a front panel made of opaque plate glass or plastic except for the dots (2) that form the numbers, and (3) is one or more wires tied together, with one end attached to each dot. An optical fiber is located so that the light passing through this optical fiber causes the corresponding dot to glow.

One end of the optical fiber is fixed to the dot part of the front plate (1), and the other end is located at the light generator (4). and a reflector (R]mlT, EC!TOR) (1)l that reflects the light emitted from the light source (5), and the other end of the optical fiber (3) is connected to the reflector. It is located at the focal point of (6).

Therefore, when the light source (5) is turned on by power from the power source (7), the light enters from the other end of the optical fiber (3) and reaches one end.

Fig. 2 shows a snow depth display device based on the concept shown in Fig. 1, in which a group of dots Fi and B form a two-digit number, and a group C of dots displays rMJ (meters). Therefore, the above three dot groups A, B,
C is displayed as 07M, for example.

In addition, in Figure 2, the black circle is selected and the number "0"
[〇 showing the moon and rMJ.

White circles are unselected dots.

FIG. 3 shows an embodiment of this invention, and in FIG.
1) is the front plate - (31) -= (a-n) is the optical fiber, (4) Fi light generator, (5) is the light source, (6) is the reflector, (7) is the power supply* (s- t)-(8-n)F
The i-optical switch is selectively controlled by a control circuit (9) which is provided in the middle of each optical fiber and selects nine individual dots. Q (I is a snow gauge that measures the snow depth from the difference between the reflection time of the ultrasonic pulse from the road surface and the reflection time from the surface of the snow piled on the road surface, and each reflection time is equal to the temperature measured by the thermometer. The snow depth is determined by correcting the snow depth.

The circuit (9) selectively controls the optical switch based on the snow depth measurement signal generated from such a snow gauge.

That is, the snow depth is displayed in dots by controlling the selection of the switch.

In the embodiment, an optical switch is provided for each line of one optical fiber, but it is also possible to provide one optical switch for a plurality of lines.

By the way, like this invention with optical fiber.

A snow depth display device that combines a light source and one reflector consumes less power than the conventionally used display device that uses lamps arranged in a dot pattern.Moreover, since there is only one light source, maintenance is easy. The cost required for maintenance is also low.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining the basic concept of this invention,
FIG. 2 is a diagram showing the surface of the snow depth display device, and FIG. 3 is a diagram showing an embodiment of the snow depth display device according to the present invention.
(ri is the front plate, (2111 dots), (31 is the optical fiber, (5) is the light source, (6) is the reflector, (7) is the power supply,
(8) is an optical switch, (9) is a dot selection control circuit,
+10 is the snow gauge. In Fig. 9, parts that are the same or correspond to ore are designated by the same reference numerals. Agent Shin Kuzuno − base j color * 2 shame

Claims (1)

[Claims] Made of plate-shaped glass or plastic. A light generating device consisting of a front plate that is opaque except for the parts of the plurality of dots forming the display numbers, one end of which is located at each dot part, and the other end of which is a light source and a reflector (R1!1FLKc!TOR). A plurality of optical fibers located at the focal point of the reflector, an optical switch provided in the middle of the optical fiber, a controller for selectively controlling the optical switch, and measuring snow accumulation on the road surface using ultrasonic waves. A snow depth display device comprising a snow gauge that supplies a snow depth measurement signal to the controller, and digitally displays the snow depth using the dots of the optical fiber.