★ Japan Meteorological Agency formula choice Devices.

★★Japan Meteorological Agency formula choice Japan Meteorological Agency formula choice Devices.Devices.

HIRAKAWA Works, Inc.HIRAKAWA Works, Inc.

ＰｏｐｏｖＴｈＰｏｐｏｖＴｈｕｎｄｅｒｕｎｄｅｒ

Coherer Type Lightning Prediction & Detection DevicesCoherer Type Lightning Prediction & Detection Devices

For machinery controlFor machinery control

Hazardous lightning

Accident case

　 10km

Striking point

Place of the damage

Thinking Thunder Roars in the distance but it strikes Thinking Thunder Roars in the distance but it strikes overhead all at once overhead all at once ！！

Fatal accident due to late notice Fatal accident due to late notice

Lightning HitLightning Hit

00:00:0000:00:0000:01:1100:01:11

00:02:1600:02:16

00:03:3200:03:32

00:04:1300:04:13 00:05:0200:05:02

00:06:2000:06:20

00:07:1100:07:1100:08:0500:08:05

00:11:0200:11:02

00:13:5200:13:52

Hazardous lightning

The thunder moves the wide area very fast. It is difficult for us to be opposed to movement of the thunder.

When you go out outdoors, you must attention to general weather information enough beforehand. You can do only the movement that is much slower than the thunder. Therefore, All lightning detector and Lightning detection or Lightning prediction systems cannot completely protect you from lightning attacking your body directly. However, you can completely protect you from lightning attacking your body directly by using the weather information well.

You should not think about only a method to survive when you were caught in thunder. Even if you got knowledge for you to survive no matter how much, you cannot completely protect you from lightning attacking your body directly.

You always learn it positively and should practice how you must have it so that you are not caught in thunder from the beginning. The effort of this you is the most reliable thing which completely than lightning attacking your body directly protects you.

Our PopovThunder is a part to remove the damage by the thunder such as electrics not to be able to do anything for by the effort of your own.

ＰｏｐｏｖＴｈｕｎｄｅｒ PopovThunder is a thunder detector to protect your PopovThunder is a thunder detector to protect your equipment or system than Lightning. equipment or system than Lightning. PopovThunder possesses all functions that are necessary to PopovThunder possesses all functions that are necessary to protect your equipment or system from Lightning, and all protect your equipment or system from Lightning, and all the movement is automatic.the movement is automatic.The thunder warning output from PopovThunder is only The thunder warning output from PopovThunder is only one, and there is not a thing bothering you. one, and there is not a thing bothering you.

•Open breakersOpen breakers•Switch power sourcesSwitch power sources•Change production lineChange production line•Turn off or on valvesTurn off or on valves•Operate automated equipmentOperate automated equipment•Warning signal to fire stationsWarning signal to fire stations

You can use the warning output from PopovThunder to your You can use the warning output from PopovThunder to your needs of the needs of the equipment or equipment or system at will.system at will.

PatentPatent JP 3266884JP 3266884 US 6586920US 6586920ＰｏｐｏｖＴｈｕｎｄｅｒ　

　　　　　　 Compact and Easy to install to existing circuitCompact and Easy to install to existing circuit

Detection UnitHW-PR-101A

Detection coil unitHW-PRPT-1

Installation view

○　 Power source system at commercial radio station.

○　 PopovThunder controls power breaker at left top.

HERE!

ＰｏｐｏｖＴｈｕｎｄｅｒ　

A The 1st strike pointB The 2nd strike point

Lightning strike occurs at least where in the circle of radius AB and thinks that there wasnot the wonder.

We define this circle as "hazardous zone".

A B

Hazardous zone

If it is thunder of the summer when it is average, hazardous zone is about 10km, but, by the thunder of the winter to occur in North Japan and North Europe, enlarges hazardous zone than 60km.

Hazardous zone changes with the speed of the Hazardous zone changes with the speed of the second. And Lightning strike occurs the next second. And Lightning strike occurs the next moment.moment.

ＰｏｐｏｖＴｈｕｎｄｅｒ How it Works

Detect lightning before strikesDetect lightning before strikes

When real Hazardous zone of the moment comes close to about 1km, PopovThunder outputs a warning signal without lightning.

Detect lightning dischargeDetect lightning discharge

When real Hazardous zone of the moment comes close to about 10km, PopovThunder detects lightning occurring in Hazardous zone and outputs a warning signal.

Selectable DetectionSelectable Detection

When it does not give system damage even if Hazardous zone comes close to about 10km, PopovThunder does not output a warning signal. This is calculated by the ability that a system resists Surge.

Applicable at transmit stationApplicable at transmit station

PopovThunder is hard to be affected by a strong transmission of a message electric wave, and there is little misdetection.

Detect equipment electric sparks Detect equipment electric sparks

PopovThunder detects the terrible spark from the equipment which gives a system damage.

ＰｏｐｏｖＴｈｕｎｄｅｒ How it Works

Warning before strike?

Hazardous zone was in Defense zone.gone

UsualWarning

ＰｏｐｏｖＴｈｕｎｄｅｒ

25kA Less

25-100kA Less

100-200kA Less

200kA or more

Scale of Lightning strike

10 ｋｍ

Defense zone

PopovThunder Hazardous zone

Striking Point

ＰｏｐｏｖＴｈｕｎｄｅｒ How it Works

Plotting from actual data I

PopovThunder detects lightning PopovThunder detects lightning before strike.before strike.

Defense zone is about 10km. Defense zone is about 10km. In a calculation, Hazardous zone In a calculation, Hazardous zone came close to 6km then. came close to 6km then. However, real Hazardous zone However, real Hazardous zone approached to less than 1km then, approached to less than 1km then, and PopovThunder output a and PopovThunder output a warning. warning.

gone

No detect lightning even in hazardous zone that No detect lightning even in hazardous zone that not affects with protected equipment & circuit.not affects with protected equipment & circuit.

Detect Dangerous Lightning even if Detect Dangerous Lightning even if away from PopovThunder.away from PopovThunder.

10 ｋｍ

UsualWarning

ＰｏｐｏｖＴｈｕｎｄｅｒ

Defense zone

PopovThunder Hazardous zone

Striking Point

ＰｏｐｏｖＴｈｕｎｄｅｒ How it Works

25kA Less

25-100kA Less

100-200kA Less

200kA or more

Scale of Lightning strike

Plotting from actual data Ⅱ

PopovThunder detects lightning PopovThunder detects lightning comes closer or goes away.comes closer or goes away.

UsualWarning

ＰｏｐｏｖＴｈｕｎｄｅｒ

10 ｋｍ

Defense zone

PopovThunder Hazardous zone

Striking Point

ＰｏｐｏｖＴｈｕｎｄｅｒ How it works

25kA Less

25-100kA Less

100-200kA Less

200kA or more

Scale of Lightning strike

Plotting from actual data Ⅲ

○ PopovThunder is for lightning protection such as electrics. For example, you must not use PopovThunder for the purpose of protecting the body of the person from thunder.

○ It is necessary for lightning protection such as electrics to put some effective parts together definitely. PopovThunder is a part of that purpose.