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Active-type lightning arrester

A lightning protection device and active technology, applied in the field of lightning protection and electronics, to achieve the effects of good lightning resistance, reducing the risk of induced lightning current inrush, and reducing the probability of damage

Inactive Publication Date: 2014-08-13
王维
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it only works intermittently, this type of system is still in the normally connected state. The present invention realizes the safe connected state according to the set time period through the control of time combined with environmental factors, and solves the lightning protection problem of this type of system through the normally disconnected method. To achieve the purpose of active lightning protection

Method used

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Embodiment Construction

[0025] Such as figure 1 The structure diagram of the device shown and figure 2In the schematic diagram of the device circuit shown, the timer 1 is composed of a clock chip (U1) and a button battery. As an example, the clock chip (U1) selects the PCF8563 dedicated clock integrated chip of PHILIPS Company, which has high clock accuracy and low power consumption. , its typical operating current value is 0.25uA (VDD=3.0V, Tamb=25°C). The button battery BT1 selects CR2032 lithium-manganese dioxide, provides 3V power supply, has a capacity of 210mAh, reduces the annual capacity to less than 2%, has a long storage life, and can be used for the clock chip to work continuously for more than 5 years; the humidity sensor 2 (U2) selects Honeywell's HIH4000 integrates humidity sensor, measuring range 0~100%RH, -40~85℃, measuring accuracy 3.5%RH, power supply 5VDC, 200uA current, output 0~4VDC; MCU 3 (U3) selects STC12LF1840T, ultra-low power consumption, automatic With a 10-bit A / D conv...

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Abstract

The invention relates to an active-type lightning arrester. The active-type lightning arrester comprises a timer 1, a humidity sensor 2, a singlechip 3, a relay 4, a built-in power supply 5 and the like which are connected in turn. The active-type lightning arrester is characterized in that the switch-on / off control for an external connecting circuit of a protected electronic device can be realized according to the preset time and the environmental humidity parameter requirement. The protected electronic device is connected to the external connecting circuit only at a working moment and under the condition of standard environmental humidity, and the protected electronic device and the external connecting circuit are thoroughly disconnected and are under a safe anti-lightning state at most of the time, thereby efficiently reducing the probability of connecting the electronic device to the external connecting circuit when a lightning stroke happens, reducing the probability of damaging the electronic device by a lightning inducting inrush current and achieving an active-type lightning-protection purpose.

Description

technical field [0001] The invention relates to an active lightning protection device, which belongs to the technical field of lightning protection and electronics. Background technique [0002] Lightning is very harmful to electronic products, especially electronic products that work in the field. It is reported that after classification and statistics of the damage factors of hydrological automation instruments that work in the field all the year round, it is found that the proportion of damage caused by lightning is as high as 70%. The reasons for the above may be as follows: [0003] 1) Lightning itself is very destructive. According to the statistics of authoritative departments, usually the energy released by a lightning strike is above hundreds of megajoules (MJ), and the magnitude of the discharge current is above tens of kiloamperes (kA). The discharge often includes multiple repeated impact discharges. The duration is as short as 1s, showing typical shock wave ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
Inventor 王维
Owner 王维
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