CN104483604A - Signal circuit lightning stroke monitor - Google Patents
Signal circuit lightning stroke monitor Download PDFInfo
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- CN104483604A CN104483604A CN201410754869.5A CN201410754869A CN104483604A CN 104483604 A CN104483604 A CN 104483604A CN 201410754869 A CN201410754869 A CN 201410754869A CN 104483604 A CN104483604 A CN 104483604A
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Abstract
The invention discloses a signal circuit lightning stroke monitor. The signal circuit lightning stroke monitor comprises a lightning current monitoring circuit and a lightning current signal processing circuit, wherein the lightning current monitoring circuit comprises a magnetic core induction coil, a sampling resistor, a voltage divider, a differential amplification circuit and a detection circuit which are sequentially connected; the lightning current signal processing circuit comprises an A/D (Analog to Digital) conversion circuit, an SCM (Single Chip Microcomputer) and a display which are sequentially connected; the detection circuit is connected with the A/D conversion circuit. The signal circuit lightning stroke monitor disclosed by the invention is used for monitoring an amplitude value and the generated time of lightning current on a signal transmission line and analyzing and counting lightning situations on the signal transmission line according to the parameters of the monitored lightning current, and the signal circuit lightning stroke monitor can also be used for counting lightning accidents in a signal circuit and providing reference data for lightning protection of the signal circuit.
Description
Technical field
The present invention relates to a kind of signal line thunderbolt monitor, belong to thunder and lightning science and technology field.
Background technology
Thunderbolt is huge for the harm of communication and signal equipment, and thunderbolt may make the interruption of communication signal, the serious damage causing communication apparatus.According to statistics, the fault of communication apparatus signal, has quite a few to cause owing to being struck by lightning.Being struck by lightning to the damage of communication facilities by way of having: one is direct lightning strike dodges device to release energy to the earth through connecing, and forms very high earth potential, by the grounding body line of ventilation equipment, noble potential being incorporated into the shell of ventilation, causing the damage of insulativity.Two is the noble potentials because the electrostatic induction of thunder and lightning and electromagnetic induction are formed.Three directly hit cable when being and launch aing surprise attack forms noble potential.
At present, electric power transmission line adopts bar magnet method, magnetic tape method, lightning positioning system to enter lightning monitoring with the method for Luo-coil to ultra-high-tension power transmission line, the accident statistical analysis caused for being struck by lightning and provide reference data to the lightning protection of ultra-high-tension power transmission line.But the application adaptation of these monitoring methods is in transmission line of electricity, because the position of the installation of signal line is indoor or be added with shielding, thunder and lightning is little relative to supply line in the amplitude of signal line, and these methods are not suitable for the monitoring of lightning current in signal line.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of signal line thunderbolt monitor, the amplitude of lightning current and the time of generation on monitor signal transmission line, Parameter analysis statistical signal according to monitoring lightning current goes out the situation that transmission line is struck by lightning, also may be used for the lightning strike accident in statistical signal circuit, for the lightning protection of signal line provides reference data.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
The invention provides a kind of signal line thunderbolt monitor, comprise lightning current observation circuit and lightning current signals treatment circuit; Wherein, described lightning current observation circuit comprises the magnetic core inductive coil, sample resistance, voltage divider, differential amplifier circuit, the detecting circuit that connect successively; Lightning current signals treatment circuit comprises the A/D change-over circuit, single-chip microcomputer, the display that connect successively; Described detecting circuit is connected with A/D change-over circuit.
When there being lightning current in signal line, magnetic core inductive coil induces the lightning voltage signal in signal line, and is loaded on sample resistance; Lightning voltage signal, after voltage divider, is delivered to differential amplifier circuit and is amplified; The lightning voltage signal amplified is converted into after direct current signal through detecting circuit, delivers to A/D change-over circuit and is converted into digital signal; Digital signal is delivered to single-chip microcomputer and is carried out processing and storing, and is shown by display.
As further prioritization scheme of the present invention, described voltage divider is resistor voltage divider circuit.
As further prioritization scheme of the present invention, described magnetic core inductive coil is vertical with signal line.
As further prioritization scheme of the present invention, described A/D change-over circuit is ADC0832 model.
As further prioritization scheme of the present invention, described single-chip microcomputer is model 89C52 model.
As further prioritization scheme of the present invention, described A/D change-over circuit is connected with single-chip microcomputer by interface circuit.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1) circuit structure of the present invention is simple, and stable work in work is safe and reliable; Install simple, only need to be contained within the scope of the neighbouring 10cm of signal cable; Have wide range of applications, be adapted to the monitoring of various cable lightning current;
2) the present invention monitors lightning current scope greatly, can monitor the lightning current from tens A to tens kA scopes;
3) all adopt the components and parts of low noise in design circuit of the present invention, there is signal to noise ratio (S/N ratio) large, the feature that measuring accuracy is high;
4) in the present invention, single-chip microcomputer is adopted to lightning current signals process, have the advantages that processing speed is fast, information is preserved automatically, repeatable recording stores.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Fig. 2 is the schematic diagram of magnetic core inductive coil, sample resistance, voltage divider, differential amplifier circuit.
Fig. 3 is detecting circuit schematic diagram.
Fig. 4 is lightning current signals treatment circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
The present invention designs a kind of signal line thunderbolt monitor, as shown in Figure 1, comprises lightning current observation circuit and lightning current signals treatment circuit; Wherein, described lightning current observation circuit comprises the magnetic core inductive coil, sample resistance, voltage divider, differential amplifier circuit, the detecting circuit that connect successively; Lightning current signals treatment circuit comprises the A/D change-over circuit, single-chip microcomputer, the display that connect successively; Described detecting circuit is connected with A/D change-over circuit.
A kind of signal line thunderbolt of the present invention monitor, its course of work is: when there being lightning current in signal line, and magnetic core inductive coil induces the lightning voltage signal in signal line, and is loaded on sample resistance; Lightning voltage signal, after voltage divider, is delivered to differential amplifier circuit and is amplified; The lightning voltage signal amplified is converted into after direct current signal through detecting circuit, delivers to A/D change-over circuit and is converted into digital signal; Digital signal is delivered to single-chip microcomputer and is carried out processing and storing, and is shown by display.
In the present embodiment, magnetic core inductive coil, sample resistance, voltage divider, differential amplifier circuit as shown in Figure 2, the bleeder circuit be made up of, are formed the differential amplifier circuit formed formed by integrated operational amplifier IC1 and IC2, resistance R3 to R7 magnetic core inductive coil L, sample resistance R, resistance R1 and resistance R2.Wherein, the lightning voltage signal loading that magnetic core inductive coil L senses is at sample resistance R two ends, sample resistance R is in parallel with bleeder circuit, is carried in the lightning voltage signal at sample resistance R two ends after dividing potential drop, and the voltage at power taking resistance R2 two ends delivers to rear class differential amplifier circuit.In the present embodiment, the voltage signal after dividing potential drop adds to the inverting input of integrated operational amplifier IC1, IC2 respectively, after differential amplifier circuit amplifies, exports at the output terminal of integrated operational amplifier IC2.In the present embodiment, integrated operational amplifier IC1 and IC2 all selects OP27 model, R3=R6=1k Ω, R4=R5=1k Ω, R7=90k Ω.The intrinsic standoff ratio of bleeder circuit is 10:1, and the enlargement factor of differential amplifier circuit is 100 times.
In the present embodiment, detecting circuit as shown in Figure 3.Detecting circuit is made up of integrated operational amplifier IC3A and IC3B, diode D1 and D2, resistance R8, electric capacity C1.Integrated operational amplifier IC3A and IC3B adopts the two integrated transporting discharging of LM358, and diode D1 and D2 forms peak detection, and electric capacity C1 is filter capacitor.Voltage signal after differential amplifier circuit amplifies adds to the normal phase input end of integrated operational amplifier IC3A, after detecting circuit, exports direct current signal at the output terminal of integrated operational amplifier IC3B.
In the present embodiment, lightning current signals treatment circuit as shown in Figure 4.Lightning current signals treatment circuit is made up of A/D change-over circuit, interface circuit, 89C52 single-chip microcomputer, display.The direct current signal that detecting circuit exports adds to the input end of A/D change-over circuit, after A/D conversion, at the output terminal output digit signals of A/D change-over circuit.Digital signal is sent to single-chip microcomputer by interface circuit, and single-chip microcomputer processes the digital signal received and after storing, shown by display.In the present embodiment, A/D modular converter selects ADC0832 model, and digital signal, resolution that simulating signal can be converted to 8 by this chip are 256.Single-chip microcomputer is selected 89C52 model to be responsible for the reception of lightning current data-signal, process and calculated also to be had data and to store and can the function of data query.
The above; be only the embodiment in the present invention; but protection scope of the present invention is not limited thereto; any people being familiar with this technology is in the technical scope disclosed by the present invention; the conversion or replacement expected can be understood; all should be encompassed in and of the present inventionly comprise within scope, therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (6)
1. a signal line thunderbolt monitor, is characterized in that, comprise lightning current observation circuit and lightning current signals treatment circuit; Wherein, described lightning current observation circuit comprises the magnetic core inductive coil, sample resistance, voltage divider, differential amplifier circuit, the detecting circuit that connect successively; Lightning current signals treatment circuit comprises the A/D change-over circuit, single-chip microcomputer, the display that connect successively; Described detecting circuit is connected with A/D change-over circuit;
When there being lightning current in signal line, magnetic core inductive coil induces the lightning voltage signal in signal line, and is loaded on sample resistance; Lightning voltage signal, after voltage divider, is delivered to differential amplifier circuit and is amplified; The lightning voltage signal amplified is converted into after direct current signal through detecting circuit, delivers to A/D change-over circuit and is converted into digital signal; Digital signal is delivered to single-chip microcomputer and is carried out processing and storing, and is shown by display.
2. a kind of signal line thunderbolt monitor according to claim 1, it is characterized in that, described voltage divider is resistor voltage divider circuit.
3. a kind of signal line thunderbolt monitor according to claim 1, it is characterized in that, described magnetic core inductive coil is vertical with signal line.
4. a kind of signal line thunderbolt monitor according to claim 1, it is characterized in that, described A/D change-over circuit is ADC0832 model.
5. a kind of signal line thunderbolt monitor according to claim 1, it is characterized in that, described single-chip microcomputer is model 89C52 model.
6. a kind of signal line thunderbolt monitor according to claim 1, it is characterized in that, described A/D change-over circuit is connected with single-chip microcomputer by interface circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410754869.5A CN104483604A (en) | 2014-12-11 | 2014-12-11 | Signal circuit lightning stroke monitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410754869.5A CN104483604A (en) | 2014-12-11 | 2014-12-11 | Signal circuit lightning stroke monitor |
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| CN104483604A true CN104483604A (en) | 2015-04-01 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106771915A (en) * | 2016-12-14 | 2017-05-31 | 国网上海市电力公司 | A kind of insulator breakdown indicator |
| CN107192874A (en) * | 2016-03-15 | 2017-09-22 | 上海普锐马电子有限公司 | A kind of pulse residual voltage measuring system for lightning surge generator |
| CN109100577A (en) * | 2018-07-11 | 2018-12-28 | 云南电网有限责任公司电力科学研究院 | A kind of remote lightening detection system and method |
| CN109375073A (en) * | 2018-11-15 | 2019-02-22 | 国网浙江省电力有限公司绍兴供电公司 | Anti-thunder insulator action current and fault current capture and identification module |
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2014
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| CN101692103A (en) * | 2009-08-26 | 2010-04-07 | 清华大学 | Testing method of parameters and characteristics of lightning strike of electric transmission line |
| CN201489039U (en) * | 2009-08-26 | 2010-05-26 | 清华大学 | Multichannel lightning current measuring device |
| CN102707135A (en) * | 2012-06-29 | 2012-10-03 | 重庆大学 | Lightning current online monitoring system of overhead transmission line based on differential ring |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192874A (en) * | 2016-03-15 | 2017-09-22 | 上海普锐马电子有限公司 | A kind of pulse residual voltage measuring system for lightning surge generator |
| CN106771915A (en) * | 2016-12-14 | 2017-05-31 | 国网上海市电力公司 | A kind of insulator breakdown indicator |
| CN109100577A (en) * | 2018-07-11 | 2018-12-28 | 云南电网有限责任公司电力科学研究院 | A kind of remote lightening detection system and method |
| CN109375073A (en) * | 2018-11-15 | 2019-02-22 | 国网浙江省电力有限公司绍兴供电公司 | Anti-thunder insulator action current and fault current capture and identification module |
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Application publication date: 20150401 |