JPS58129326A - Display device of concentration of noxious material - Google Patents

Abstract

PURPOSE:To display the concentration of noxious material by only one light source, by controlling light which passes through a plurality of optical conductors by optical switches in response to the measured concentration signal of the noxious material. CONSTITUTION:The optical switches 8-1-8-n are selectively controlled in response to the measured concentration signal of the noxious gas obtained by a gas concentration meter 10. The light emitted from the light source 5 of a light generating device 4 is inputted into one end of each of the optical conductors 3-1-3-n and reaches the other ends. At the other ends of the optical conductors 3-1-3-n provided at the position of a front plate 1, only the end surfaces selected by the optical switches are lighted, and the concentration of the noxious material is digitally displayed by dots.

Description

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

m outside I! There are various types of hazardous substance concentration display devices that digitally display the concentration of the above substances.
There are those that rotate a movable plate shaped like ii7', and those that rotate a number ring.

However, these devices have a short lifespan, consume a lot of power, and have movable parts that are prone to failure.

't. If you don't do enough maintenance, the number will drop to J11.
5! The dots that appear become 1lllIl and 1 dot. The present invention is an improvement on the conventional time display device, and the present invention will be explained based on the following reasons.

The first part shows the basic concept of this invention, and the front plate is opaque except for the dots 12) where the mountains form numbers and is made of plate glass or gelastec.
Numeral 131 is a round rod-shaped light guide that forms one dot, one end of which is located at each dot, is made of transparent plastic, and has seven lexibilities.

The light passing through this light guide causes the dots to glow.

One end of the light guide is fixed to the dot part of the front plate, and the other end is located at the light generating device (4).

That is, the light generating device +41 includes a light source (for example, a halogen lamp) 151 and the y emitted from this light source (5).
Reflector that reflects t (EFLgCTOR) +61
The other end of the light guide (31) is located at the focal point of the reflector (6).

Therefore, when the light source (5) is turned on by the power from the power source (7), the light enters from the other end of the light guide 43).
Reach one end.

Fig. 2 shows a IIIK display device 1 for harmful substances constructed based on the concept as shown in Fig. 1.
A display device T is formed by dot groups A and B forming a two-digit number and dot group C forming a number displaying "ch".
Since the surface of D is formed, the three dot groups B and C represent the percentage of harmful substances.

Note that in the "e@" figure, the black dots are selected and show an example of numbers.On the other hand, the white dots are unselected dots.
It goes without saying that the number of digits displayed in one display is not limited to two digits.
The figure shows an embodiment of this invention, and in Figure 3, (1)
is the front plate, (3-1) to (3-n) are the light guides,
+4) is a light generating device.

(51 is a light source, (6) is a reflector, (71 is a power source, (8-
Optical switches 13 to (8-a) are provided in the middle of each light guide, and are selectively controlled by a control circuit (9) that selects the fakK dot. This *5uttto is a gas concentration needle that measures the concentration of, for example, nitrogen oxide (NO) by resonance absorption of ultraviolet light, and measures the concentration of harmful gas emitted from such a concentration meter. The circuit (91) selects and controls the optical switch according to the concentration measurement signal.

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

By the way, the concentration display device t, which combines a light guide, a light source, and nine reflectors as in the present invention, consumes less power than the commonly used lamps arranged in a dot shape, and has a light source. Since there is only one, maintenance is easy and the cost required for maintenance is low.

[Brief explanation of the drawing]

No. 11/ is a companion diagram for explaining the basic concept of this invention, and Fig. 2 is a diagram showing the main display device of the IIk degree table for harmful substances. FIG. The mountain is the front plate, (2) is the dora), 131 is the light guide, (5)
is a light source, (6) is a reflector, (7) is a power source, tS+#i
light switch. (9) is a dot selection control circuit, and ul is a gas concentration needle. Note that the same or corresponding parts in FIG. 9 are designated by the same reference numerals. Agent 4 No 1 - Base Ir: A Ta Z [F]

Claims (1)

[Claims] Made of plate-shaped glass or 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 formed of transparent glass and is located at the focal point of the reflector of a light generating device consisting of a light source and a reflector (RBFLIiC-TOR). and a plurality of round rod-shaped light guides having flexibility, a light switch provided in the middle of the light guide, a stone controller for selectively controlling the light switch, and a controller that controls harmful substances contained in the atmosphere. Gas 1I that gives the 11th measurement number of 4
#I of harmful substances, characterized in that the quality of the harmful substances is digitally displayed by the dots on the light guide. Degree display device.