CN2819227Y

CN2819227Y - Thunderbolt counter

Info

Publication number: CN2819227Y
Application number: CN 200520016956
Authority: CN
Inventors: 林云志; 刘鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-04-21
Filing date: 2005-04-21
Publication date: 2006-09-20
Anticipated expiration: 2015-04-21

Abstract

The utility model relates to a device for counting the lightning strike times of thunderbolt, which comprises a thunder current transducer, a voltage converting loop, an over-voltage protecting loop, a counting loop and a display part. When thunder current flows into ground through a grounding wire, the thunder current transducer induces a current signal which is converted to a voltage signal through voltage conversion and is sent to a counting chip to be counted, and then the obtained result is sent to the LED to be displayed. The utility model doesn't change the grounding wire, and has good anti-thunder effect, and the counting value can be automatically added and can also be cleared by hands. The counting value can be displayed through the LED so that the utility model has convenient management and operation.

Description

The thunderbolt counter

Technical field

The utility model belongs to big current detecting field, a kind of device that is used to add up thunderbolt thunderbolt number of times.

Background technology

The harm of thunder and lightning is huge, when serious even the life that jeopardizes people.People have taked a large amount of lightning protection measures for this reason, as lightning rod, lightning conducter even dissipation array etc., mainly are in order to avoid or eliminate the harm of thunder and lightning.But after the installation lightning protection device, how we can know just whether this measure has played effect, played great effect? about this problem, still not having at present a kind of device of simple possible monitors, can only be struck by lightning by the time and destroy the equipment at this place, or see that could understand discharge when gap discharge takes place at this place takes place at this place, this method is infeasible in practice.In order to carry out lightning protection research better, we have designed a kind of thunder and lightning counter.This counter can write down each thunderbolt situation automatically, and statistics shows the thunderbolt number of times at this place, and by statistics thunderbolt number of times, the lightning protection measures that also can make the user decide these place's needs to take according to actual conditions.This product also can be used as a kind of measure that lightning arrester manufacturer checks own properties of product.

Summary of the invention

The purpose of this utility model provides a kind of device of calculating thunderbolt number of times of simple possible.

Thunderbolt counter of the present utility model is made up of lighting current sensor, voltage transitions loop, overvoltage protection loop, counting circuit and display part.

Described lighting current sensor is that a current coil produces the induction current that is proportional to amplitude of lightning current by this current coil inductance induction.

Described voltage circuit be an integrating resistor to induction current again integration generate the induced voltage that is proportional to the lightning current size.

Described overvoltage protection loop is because the amplitude of lightning current is bigger, considers the safety of back electronic circuit and an overvoltage crowbar specially adding, is made of Transient Suppression Diode and voltage dependent resistor (VDR).

Described counting circuit is made up of some counting chips and discrete component, can realize that manual zero clearing and count value add up.

Described show circuit is that LED shows, the numerical value behind the counting is delivered to LED and shown.Counting circuit links to each other with direct supply by lead with LED.Described direct supply is advisable with 2.5V ~ 15V, preferably 3V.

The beneficial effects of the utility model: 1. do not change ground wire, do not influence original ground connection performance.2. the thunderbolt number of times can add up automatically, manually zero clearing.3. count value can show by LED, is convenient to management and operation.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the schematic diagram of lighting current sensor.

Among the figure: 1, display switch, 2, manually put several buttons, 3, reset key, 4, panel shows, 5, current sensor.

Embodiment

The invention will be further described below in conjunction with accompanying drawing.

Square part in front is overvoltage protection loop, counting circuit and display part in the drawings, and the back circular portion is lighting current sensor and voltage transitions loop.

The overvoltage protection loop is made of transient state suppressing diode and voltage dependent resistor (VDR), is connected in parallel on to be used to protect electronic circuit and clipping signal amplitudes on the circuit.

Counting circuit mainly is made up of a counting chip.Each an electric signal is just counted once, has the function of counting, storage accumulative total, makes us can obtain the number of times that is struck by lightning at any time.Circuit shows the thunderbolt number of times by charactron.Also have manual set and reset key on panel, for can manually being set to original numerical value when changing battery, thereby keep count value constant, counting also can zero clearing starts anew.Drive charactron by display circuit and show that its demonstration is not opened when working at ordinary times, have only when needed and just open demonstration, extend working time to reduce power consumption by the switch switching of panel.

This device can adopt DC power supply 2.5V ~ 15V, preferably adopts 2 joint 1.5V powered battery.

Accompanying drawing 2 is fundamental diagrams of lightning current monitoring part, and it is made up of current sensor (Rogowski coil).This coil is used to measure high-frequency current, and measurement range is wide, reaches 200 ~ 50KA.When lightning current passes through the arrester ground line, be enclosed within the Rogowski coil on the ground wire and will induce electric current, the rate of change of this electric current is directly proportional with the size of current that flows through.Form a voltage signal that is directly proportional with size of current by an integrating resistor, this signal is delivered to counting circuit through lead.Entire circuit and ground wire do not have direct electrical communication, can not have any impact to major loop.

The present invention has following good effect compared with prior art:

1, simple in structure, circuit is reliable, and is easy to operate;

2, do not change original earthed system, do not affect original lightning protection effect;

3, with low cost, power consumption is little, and normal use of common batteries power supply is 1 year.

Claims

1, a kind of thunderbolt counter; it is characterized in that: it is made up of lighting current sensor, voltage conversion circuit, overvoltage protection loop, counting circuit and display part; described lighting current sensor is one and can produces and be proportional to the faradic current coil of amplitude of lightning current; described voltage transitions loop is an integrating resistor; described show circuit is the LED display circuit, and described counting circuit links to each other with direct supply by lead with led circuit.

2, counter according to claim 1 is characterized in that: described overvoltage protection loop is made of Transient Suppression Diode and voltage dependent resistor (VDR).

3, counter according to claim 1 is characterized in that: described counting circuit mainly comprises a counting chip.

4, counter according to claim 1 is characterized in that: counter includes a panel, panel demonstration, display switch is arranged on the panel, manually put several buttons and reset key.