JPS5863808A - Device for displaying concentration of injurious materials - Google Patents

Abstract

PURPOSE:To display digitally concentration of injurious materials with a device having a long life and reduced power consumption, by delivering light from a light source to the plural dots from one ends of optical fibers positioned at a focus of a reflecting mirror, and providing optical switches controllably on the way of the optical fibers. CONSTITUTION:A light source 5 is lightened by electric power from a power source 7, and one ends of optical fibers 3-1, 3-2...3-n are placed at a focus of a reflecting body 6, and the other ends of each optical fiber are fixed to each dot 2 part of a front board 1 for a digital display. Optical switches 8-1...8-n which are turned on and off by a controlling circuit 9 controlling the selection of dots 2 by a concentration signal from a concentration measuring device 10 of injurious materials, e.g. (NOX,SO2etc.) in the atmosphere, and provided in the middle of each fiber. By such a way, a digital display device which is reduced its power consumption, has no troubles of movable parts, and permits easy maintenance with a long life, is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hazardous substance concentration display device suitable for digitally displaying the concentration of hazardous substances such as nitric oxide (NO) contained in the atmosphere outdoors.

There are various types of hazardous substance concentration display devices that digitally display the concentration of the above substances for outdoor use, including those that use a high-intensity lamp or those that rotate a movable plate with numbers on it. , and one that rotates a number ring.

However, these lamps have problems such as short lamp life, high power consumption, and movable parts that are prone to failure.

Also, if you don't do enough maintenance, the dots that make up the numbers will become dull. This invention is a book that improves the problems of such conventional time display devices,
The invention will be explained below with reference to the drawings.

Figure 1 shows the basic concept of this invention (11
dots that form the numbers (a front plate made of opaque plate glass or plastic except for the part 21; The light passing through the 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 (41).

That is, the light generating device (41 is composed of a light source (for example, a halogen lamp) (5) and a reflector (1'lFT, EOTOR) (61) that reflects the light emitted from the light source (5); The other end of the optical fiber (31) is located at the focal point of the reflector (6).

Therefore, when the light source (5) is lit by electric power from the electric power, the light enters from the other end of the optical fiber (3),
Reach one end.

The second diagram shows a hazardous substance concentration display device made by VC@ based on the concept shown in Figure 1. Here, a group of dots A and B forming a two-digit number and a "chi" are displayed. Figure 3 shows a case in which the surface of the display device TD is formed by a group of dots C forming numbers.

Therefore, the three groups of dots A, B, and OK represent a base set of harmful substances.

In addition, in FIG. 2, the black circles indicate the selection bar and an example of the numbers. On the other hand, white circles are unselected dots. I cut it. ppm I instead of percentage (%)
Even if it is displayed by c, there is no need to say that it is important to read it, and the number of digits in one display number is limited to two digits, and it is not even 1. FIG. 3 shows an embodiment of this invention, and in FIG.
) is the front plate, (3-7) to (3-n) are the optical fibers, (
4) is a light generator, (5) is a light source, (6) is a reflector, (
7) is the power supply.

Optical switches (8-1) to (8-n) are provided in the middle of each of the 11 optical fibers and are selectively controlled by a control circuit (9) that selects one dot individually. This densitometer OG measures the concentration of, for example, nitrogen oxide (No) by resonance absorption of ultraviolet light. The signal causes the circuit (9) to select the optical switch.

That is, the display is performed in the same way as a conventional digital concentration display device.

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

By the way, like this invention with optical fiber.

The concentration display device, which combines a light source and two reflectors, consumes less power than the commonly used conventional device in which lamps are arranged in a dot shape, and it is easy to maintain because there is only one light source. This also reduces maintenance costs.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining the basic concept of this invention,
Figure 2 shows the surface of the hazardous substance concentration display device, Figure 3
The figure shows an embodiment of a hazardous substance concentration display device according to the present invention. (1) is the front plate, (21 dots, (31 is the optical fiber, (5) is the light source, (6) is the reflector, (7) is the power source, (8
111- is an optical switch; (9) a dot selection control circuit;
&Ill is a gas concentration meter. Note that the same reference numerals are given to the same or corresponding parts in FIG. 9. Agent Makoto Kazuno

Claims (1)

[Claims] Plate-shaped glass′=! or made of plastic. A front plate that is opaque except for the plurality of dots forming the display numbers, and one end of each is located at each dot.
The other end is a plurality of optical fibers located at the focal point of the reflector of a light generating device consisting of a light source and a reflector (RKFLEO-TOR), an optical switch with h5 provided in the middle of the optical fiber, and the optical switch. A controller that selects and controls the
The side device is comprised of a gas S temperature meter that provides a signal to measure the concentration of harmful substances contained in the atmosphere, and the concentration of harmful substances is digitally displayed using the dots of the optical fiber. Concentration display device for hazardous substances.