JPH0466893A - Announcing device for fallout of ashes from sakurajima volcano - Google Patents

Abstract

PURPOSE:To enable automatic and mechanical coping-with by outputting detection signal and actuation signal from a signal processing circuit of ash falling detection signal to which an optical sensor is connected, when falling ash is collected by a metal fixture of receiving tray. CONSTITUTION:A light receiving part of an optical sensor 2 is painted so that a light exposure part may be exposed only around 1mm diameter and therewith very little amount of the falling ash may be detected. Also, detection output of ash falling is transferred to a controlling circuit to drive an air pump 5 and therewith the falling ash deposited on an upper part of light receiving part of the sensor 2, can be blown off right after the sensor 2 outputs the detection signal. A nozzle part 4 at an end tip of an air hose 6 is attached to the best position to blow off volcanic ashes. Then, the sensor 2 and a falling ash collection cylinder 1 of cone shape which collects the falling ash, are combined together, and when the ash falls, the volcanic ashes falling into the collection cylinder 1 is deposited from an end hole of the cylinder to shadow a sensing part of the sensor 2 and therewith detection output of the sensor 2 can be obtained.

Description

[Detailed Description of the Invention] [Field of Industrial Application] In Kagoshima Prefecture, volcanic ash fall from the eruption of Sakurajima has caused damage to crops, damage to school swimming pools, homes being unable to open windows, damage to laundry, etc. There are various problems caused by ash fall, such as damage to cars at used car centers, but the present invention is a means to solve these problems. It supplies an alarm for ash fall. Also, in the field of weather observation, by installing the present invention in various places,
The presence or absence of ash fall, the time of ash fall, the range of ash fall, and the amount of ash fall can be fully measured.

[Conventional technology] Although there is a conventional technology for measuring the amount of ash accumulated in ash fall for weather observation as the amount of ash fall per day,
It seems that there was no ash fall detector that could quickly catch the volcanic ash that had begun to fall and notify that ``it has now started falling'' like the present invention.

[Problems to be Solved by the Invention] Hitherto, in Kagoshima Prefecture, which has an active volcano called Sakurajima, the fall of volcanic ash from the eruption of Sakurajima has caused great damage to crops and the lives of citizens in the area. The object of the present invention is to be able to detect the volcanic ash as soon as it begins to fall at the installation site of the present invention and to be able to issue an alarm, thereby making it possible to automatically deal with the ash fall using a machine. The purpose is

[Means for Solving the Problems] In order to solve the above problems, the present invention includes an optical sensor (2) and a conical ash collection tube (1) for collecting ash.
), when ash falls, the volcanic ash that falls into the ash collection tube (1) passes through the hole at the tip of the tube to the optical sensor (2).
The sensing part of the optical sensor (2) is shaded by the falling ash, which makes it possible to obtain the sensor's detection output of ash falling.

The top opening of the conical ash collection tube (1) that collects ash is preferably about 20 centimeters in diameter, and although the actual amount of ash fall varies slightly, in most cases it starts to fall within 15 seconds to 5 minutes. can be detected and output. The hole at the tip of the conical ash collection tube (1) should be approximately 5 mm in diameter, and when attached to the device, it should be installed on top of the light receiving part of the optical sensor (2) at a distance of about 5 mm.

The light-receiving part of the optical sensor (2) is painted so that only about 1 mm in diameter is exposed, so that even a small amount of ash can be detected.

In addition, the ash fall detection output can be connected to the control circuit and the air pump (
5) so that the volcanic ash accumulated on the upper part of the light receiving part of the optical sensor (2) is blown away as soon as the sensor outputs a detection signal.

The air hose (
The nozzle part (4) at the tip of item 6) should be installed in a position where it can best blow off volcanic ash. In addition, the air pump (5) used was one for a goldfish tank with a rated power consumption of 2.5 W, but volcanic ash would be poorly blown away if the air pump had a lower standard.

[Operation] If you install the ash fall alarm configured as above on the roof or garden where you think it can collect ash well and wait for ash to fall, Sakurajima will erupt and the wind direction will be good (toward this direction). If the direction is right, volcanic ash will begin to fall on our city in a few minutes.

When ashfall begins and particles of volcanic ash begin to flicker into the ash collection tube, the ash detector will output an ashfall detection signal in about one or two minutes, letting you know that volcanic ash is falling.

Traditionally, you would listen to the forecast for today's wind direction,
If Sakurajima erupts, ash will fall here if the wind blows in this direction.
So today, the normal conversation was that we shouldn't hang our laundry outside to dry, and that we should keep the windows closed, but in the future, we'll have sensors so we can hang our laundry outside to dry until the ash falls, and we can close the windows. Feel free to leave it open.

[Example] In the example, when the device is connected to a computer and the ash fall detection signal is output once, it is called one count.In fact, several hours after installing this device, there was no ash fall even though there was no eruption. By making it possible to determine that even if the detection signal counts 1, it is caused by sand or dirt, it becomes possible to detect only ash fall without any doubt.

In the same way, by connecting the output of the ash fall detection signal to a computer and using it for meteorological observation, it is possible to measure the time when ash fall started, the time it continues to fall, and if it can be installed at multiple points, ash fall It also becomes possible to measure and analyze areas where

When considered for use in daily life, if the output of the ash fall detection signal is connected to electric opening/closing devices such as garage shutters and windows, movable vinyl tent roofs for agricultural use to prevent ash fall, ash fall tents at school pools, etc. It is possible to realize rapid automatic control measures against time.

In addition, it is possible to deal with both rain and ash fall in conjunction with a rain sensor, or to process the output of the rain sensor as an exclusive signal since the ash fall detector does not work well with volcanic ash4 wet in the rain. I'm also thinking about using it.

[Effects of the Invention] The configuration of the present invention is as shown above, and since it is possible to detect and issue an alarm as soon as ash begins to fall, there is no need for human lookouts, and the system can be used day and night. Not only will it be possible to realize fully automated ash fall management without any restrictions, it will also have the effect of significantly reducing damage to crops and new cars caused by ash fall, as well as damage to school swimming pools, etc.

Additionally, it can be said that we have created an unprecedented ash fall sensor, so I think we will be able to develop products using the ash fall sensor in the future, such as automatic hangings that expand and contract when ash falls, and aluminum sash windows that automatically open and close. .

[Brief explanation of drawings]

Figure 1: Structural diagram of the present invention Figure 2 Ash fall detection processing circuit diagram Figure 3 Air pump drive circuit diagram Figure 4 Lamp drive circuit diagram (1) Ash collection tube (2) Optical sensor (Cds) (3) Saucer metal fittings (4) Nozzle part (5) Air pump (6) Air hose (7) Lamp (8) Lamp drive circuit (9) Air pump drive circuit (10) Ashfall detection signal processing circuit Bulk 1 diagram

Claims (1)

[Claims] An optical sensor (2) for detecting ash fall was installed under the ash collection tube (1) with a slight depression so that the collected ash would be properly received on the Cds (hereinafter abbreviated) optical sensor (2). When the tray metal fitting (3) is placed and ash is actually collected on the tray metal fitting (3), the optical sensor (2)
At the same time, a detection signal and an operation signal are output from the ash fall detection signal processing circuit (10) to which the ash fall detection signal processing circuit (10) is connected, and at the same time, the air pump (5) is activated by the signal, and air is vigorously ejected from the nozzle (4) for a set time, and the optical sensor ( 2)・Saucer metal fittings (3)
Ash fall alarm system that blows away the ash that has accumulated on top and then repeats the detection of ash fall (Fig. 1)
A lamp (7) and a lamp drive circuit (8) are also placed near the optical sensor (2) so that the optical sensor (2) can detect ash fall throughout the day and night.