CN201846072U - Special lightning protection device for seismic instrument - Google Patents
Special lightning protection device for seismic instrument Download PDFInfo
- Publication number
- CN201846072U CN201846072U CN2010205503945U CN201020550394U CN201846072U CN 201846072 U CN201846072 U CN 201846072U CN 2010205503945 U CN2010205503945 U CN 2010205503945U CN 201020550394 U CN201020550394 U CN 201020550394U CN 201846072 U CN201846072 U CN 201846072U
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- Prior art keywords
- lightning protection
- protection device
- seismic
- instrument
- lotus root
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Abstract
A special lightning protection device for a seismic instrument comprises a lightning protection device body connected in series between a seismic signal sensor and a seismic measuring instrument. At least two-stage discharging circuits and one-stage decoupling circuits are arranged in the lightning protection device body; each one-stage decoupling circuit is connected in series between each two adjacent two-stage discharging circuits and consists of a decoupling device; and the decoupling device is an inductance element formed by winding a high-purity copper wire on a closed magnetic ring. As the inductance element formed by winding the high-purity copper wire on the closed magnetic ring is adopted as the decoupling device, the impedance of the decoupling device to lightning can meet the requirement on decoupling, coordinate and normal discharging of the discharging circuits is ensured, the impedance of the decoupling device to measuring signals of the seismic instrument is 'zero', and the measuring signals are not attenuated, and lightning protection effect is ensured without affecting measuring precision of the seismic instrument. Moreover, the special lightning protection device is simple in structure and fine in practical effect, and is especially applicable to lightning protection for the LT-series seismic instrument.
Description
Technical field
The utility model relates to a kind of lightning protection device, the special-purpose lightning protection device of particularly a kind of seismic instrument.
Background technology
Seismic instrument is installed in the remote field of thunder and lightning environment very severe, practical operating experiences shows for many years, the main fault of seismic instrument is all from thunderbolt, require very high precision equipment because seismic instrument is a certainty of measurement, and the requirement of seismic instrument is not satisfied in the decay of present lightning protection device.Because existing lightning protection device; as shown in Figure 1; lightning protection device is connected between outer circuit and the protected equipment; its inside is provided with two-stage discharge circuit at least and the one-level that is arranged between every adjacent two-stage discharge circuit is moved back the lotus root circuit; wherein the effect of discharge circuit is the ground of releasing of the lightning current on the circuit; the effect of moving back the lotus root circuit is to guarantee discharge circuits coordination regular pictures at different levels; and move back the lotus root circuit and adopt the pure resistance (1 ＇) of 1 Europe to about 5 Europe; to the decay of signal mostly more than 0.5%; decay although it is so is negligible for general signal transmission; but the certainty of measurement of seismic instrument is very high; certainty of measurement such as the distortion measurement instrument of rock mass has reached ten thousand/millimeter; the error that 0.5% decay causes is considerably beyond the certainty of measurement of seismic instrument; and its error changes along with the variation of environmental factors such as temperature; therefore, this class lightning protection device can not be used on the seismic instrument.
Summary of the invention
The purpose of this utility model is at above-mentioned existing problems and deficiency, and a kind of decay that can prevent the seismic survey signal effectively is provided, and can promote the protection effect to seismic instrument again, and the special-purpose lightning protection device of simple in structure, practical seismic instrument.
The technical solution of the utility model is achieved in that
The special-purpose lightning protection device of seismic instrument described in the utility model, comprise the lightning protection device body that is connected between seismic signal transducer and the earthquake measuring instrument, the one-level that is provided with two-stage discharge circuit at least in the described lightning protection device body and is serially connected between every adjacent two-stage discharge circuit is moved back the lotus root circuit, the wherein said lotus root circuit that moves back is formed by moving back the lotus root device, is characterized in the described inductance element of lotus root device for being formed on closed magnet ring by the high-purity copper wire-wound that move back.
In order to make simple, the easily manufactured and saving cost of the utility model circuit configuration; simultaneously can reach the excellent protection effect; be provided with three grades of discharge circuits in the above-mentioned lightning protection device body that is connected between seismic signal transducer and the earthquake measuring instrument, be provided with one-level between the every adjacent two-stage of described three grades of discharge circuits and move back the lotus root circuit.
The utility model is owing to adopting the inductance element that is formed on closed magnet ring by the high-purity copper wire-wound as moving back the lotus root device, making this move back the lotus root device not only can reach the impedance of thunder and lightning and move back the lotus root requirement, guarantee discharge circuits coordination regular pictures at different levels, and be " zero " to the impedance of earthquake apparatus measures signal, make measuring-signal undamped, so both guaranteed lightning protection effect, again the earthquake Instrument measuring precision there is not influence, thereby solved existing lightning protection device effectively owing to adopting pure resistance to cause the attenuation problem of measuring-signal, and the utility model is simple in structure, good practical effect is specially adapted to the lightning protection of LT series seismic instrument.
Below in conjunction with accompanying drawing the utility model is further described.
Description of drawings
Fig. 1 is the interior circuit construction schematic diagram of existing lightning protection device.
Fig. 2 is an interior circuit construction schematic diagram of the present utility model.
Embodiment
As shown in Figure 2, the special-purpose lightning protection device of seismic instrument described in the utility model, comprise the lightning protection device body that is connected between seismic signal transducer and the earthquake measuring instrument, the one-level that is provided with two-stage discharge circuit at least in the described lightning protection device body and is serially connected between every adjacent two-stage discharge circuit is moved back the lotus root circuit, and the equal ground connection of discharge circuits at different levels, the wherein said lotus root circuit that moves back is formed by moving back lotus root device 1, and the described inductance element of lotus root device 1 for forming on closed magnet ring by the high-purity copper wire-wound that move back.In order to make simple, the easily manufactured and saving cost of the utility model circuit configuration; simultaneously can reach the excellent protection effect; be provided with three grades of discharge circuits in the above-mentioned lightning protection device body that is connected between seismic signal transducer and the earthquake measuring instrument, be provided with one-level between the every adjacent two-stage of described three grades of discharge circuits and move back the lotus root circuit.That is to say, be serially connected with the first order between first order discharge circuit and the second level discharge circuit and move back the lotus root circuit, move back the lotus root circuit and be serially connected with the second level between second level discharge circuit and the third level discharge circuit, wherein first order discharge circuit can be made up of gas discharge tube 2, second level discharge circuit can be made up of piezo-resistance 3, third level discharge circuit can be managed 4 by TVS and formed, and an end of gas discharge tube 2, piezo-resistance 3 and TVS pipe 4 is connected other end ground connection with main circuit.
Because the seismic sensor signal is the low frequency signal in the 1HZ, almost is direct current signal, inductance element is " 0 " to the decay of direct current signal, and is an impedance greater than 1 Europe to the thunder and lightning more than the 100KHZ.Therefore, the big I of impedance is calculated according to following formula:
Z=2πfL
Wherein, Z is impedance; π is a constant, and value is 3.14; F is a frequency, and the lightning wave frequency is calculated according to 100KHZ; L is an inductance value;
According to above-mentioned formula, when moving back lotus root resistance when being 1 Europe under the lightning wave frequency, for the seismic signal impedance less than 10
-5Europe is almost " 0 " to the decay of earthquake measuring-signal, and therefore the decay to the earthquake measuring-signal is negligible.
In addition, because seismic signal is one group of multiple signals, a transducer is measured a plurality of variable quantities simultaneously, therefore lightning protection device also will satisfy multichannel while transmission signals and the problem of non-interference, a plurality of inductance elements have the mutual inductance problem together, mutual inductance signal is exactly an interference signal, requires two adjacent inductance elements to stagger when therefore installing.
The utility model is described by embodiment, but the utility model is not construed as limiting, with reference to description of the present utility model, other variations of the disclosed embodiments, expect easily that as professional person such variation should belong within the utility model claim restricted portion for this area.
Claims (2)
1. the special-purpose lightning protection device of a seismic instrument, comprise the lightning protection device body that is connected between seismic signal transducer and the earthquake measuring instrument, the one-level that is provided with two-stage discharge circuit at least in the described lightning protection device body and is serially connected between every adjacent two-stage discharge circuit is moved back the lotus root circuit, the wherein said lotus root circuit that moves back is formed by moving back lotus root device (1), it is characterized in that the described inductance element of lotus root device (1) for being formed on closed magnet ring by the high-purity copper wire-wound that move back.
2. according to the special-purpose lightning protection device of the described seismic instrument of claim 1, it is characterized in that being provided with three grades of discharge circuits in the above-mentioned lightning protection device body that is connected between seismic signal transducer and the earthquake measuring instrument, be provided with one-level between the every adjacent two-stage of described three grades of discharge circuits and move back the lotus root circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205503945U CN201846072U (en) | 2010-09-30 | 2010-09-30 | Special lightning protection device for seismic instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205503945U CN201846072U (en) | 2010-09-30 | 2010-09-30 | Special lightning protection device for seismic instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201846072U true CN201846072U (en) | 2011-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205503945U Expired - Fee Related CN201846072U (en) | 2010-09-30 | 2010-09-30 | Special lightning protection device for seismic instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201846072U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414177A (en) * | 2013-07-26 | 2013-11-27 | 北京广利核系统工程有限公司 | Electromagnetic protection circuit of analog signal input line |
| CN104022487A (en) * | 2014-06-24 | 2014-09-03 | 孙宏志 | Earthquake monitoring base station lightning protection system based on nanometer electromechanical sensor |
-
2010
- 2010-09-30 CN CN2010205503945U patent/CN201846072U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414177A (en) * | 2013-07-26 | 2013-11-27 | 北京广利核系统工程有限公司 | Electromagnetic protection circuit of analog signal input line |
| CN104022487A (en) * | 2014-06-24 | 2014-09-03 | 孙宏志 | Earthquake monitoring base station lightning protection system based on nanometer electromechanical sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110525 Termination date: 20120930 |