CN205404774U - Low frequency magnetic sensor - Google Patents
Low frequency magnetic sensor Download PDFInfo
- Publication number
- CN205404774U CN205404774U CN201620172716.4U CN201620172716U CN205404774U CN 205404774 U CN205404774 U CN 205404774U CN 201620172716 U CN201620172716 U CN 201620172716U CN 205404774 U CN205404774 U CN 205404774U
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- CN
- China
- Prior art keywords
- bar magnet
- low frequency
- magnetic sensor
- frequency magnetic
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a seismic precursor low frequency magnetic field observation device specifically is a low frequency magnetic sensor. A low frequency magnetic sensor, includes tube -shape casing and end cover, and the tube -shape casing is plastic housing, and it has the DT4E bar magnet to support in the tube -shape casing, and this bar magnet passes through packing support between bar magnet and the tube -shape shells inner wall in the tube -shape casing, and the winding has the demarcation coil that becomes corresponding proportion with measuring coil on the bar magnet, and the tip of demarcating coil and measuring coil is followed the end cover and is drawn. The utility model provides a low frequency magnetic sensor adopts special DT4E bar magnet as the magnetic core, and the magnetic core uses with the remnant field influence of the in -process of demagnetization very for a short time first, and the coercive force is low, and it is high to have low frequency sensitivity, and characteristics such as linear amplification are fit for the seismic precursor and survey the use.
Description
Technical field
This utility model relates to seismic precursor low frequency magnetic field observation device, is specially a kind of low-frequency magnetic sensor.
Background technology
Induction type magnetic sensor is because its noise is low, simple in construction, stability advantages of higher, it is widely used in the observation in GEOMAGNETIC CHANGE magnetic field, it is particularly well-suited to the geomagnetic pulsation in variation magnetic field and the observation of ULF (UltraLowFrequency, intrasonic) signal.At present, domestic sensors with auxiliary electrode frequency band of detection is narrower, low-frequency band sensitivity is low, the scope of application is subject to a definite limitation, such as that seismic precursor low frequency signal is insensitive, it adopts lath closed assembly to become the iron core of cuboid as core material simultaneously, and magnetic capacity is relatively low, making the sensor bulk made and weight relatively big, using to the later stage makes troubles.
Summary of the invention
This utility model in order to solve existing Magnetic Sensor to low frequency signal sensitivity low and inconvenient problem with use, it is provided that a kind of low-frequency magnetic sensor.
This utility model adopts the following technical scheme that realization: a kind of low-frequency magnetic sensor, including tubular shell and end cap, tubular shell inner support has bar magnet, and bar magnet is wound with calibration coil and the measuring coil of certain number of turn, and the end of calibration coil and measuring coil is drawn from end cap.
During use, it is necessary to regularly use caliberating device, by calibration coil, sensor is carried out Laboratory Calibration, to guarantee the accuracy measured.Timing signal, from calibration coil input sine wave electric current, measures sinewave output voltage in measuring coil.
Above-mentioned a kind of low-frequency magnetic sensor, bar magnet is supported in tubular shell by the implant between bar magnet and tubular housing inner wall, and this implant is paraffin.
Above-mentioned a kind of low-frequency magnetic sensor, bar magnet is DT4E bar magnet.
This utility model provides a kind of low-frequency magnetic sensor, adopts extraordinary DT4E bar magnet as magnetic core, and magnetic core is only small in the remnant field impact for the first time and in the process of demagnetization, coercivity is low, there is low frequency sensitivity height, the characteristic such as linear amplification, it is suitable for earthquake precursor observation and uses.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1-tubular shell, 2-end cap, 3-bar magnet, 4-implant, 5-calibration coil, 6-measuring coil.
Detailed description of the invention
In conjunction with accompanying drawing, this utility model is further illustrated.
As shown in Figure 1, a kind of low-frequency magnetic sensor, including tubular shell 1 and end cap 2, tubular shell 1 is plastic casing, tubular shell 1 inner support has DT4E bar magnet, and this bar magnet is supported in tubular shell by the implant 4 between bar magnet and tubular housing inner wall, and this implant is paraffin, being wound with the calibration coil 5 and measuring coil 6 that become corresponding proportion with measuring coil on bar magnet, the end of calibration coil 5 and measuring coil 6 is drawn from end cap 2.
Claims (3)
1. a low-frequency magnetic sensor, it is characterized in that including tubular shell (1) and end cap (2), tubular shell (1) inner support has bar magnet (3), and bar magnet (3) is wound with calibration coil (5) and measuring coil (6), and the end of calibration coil (5) and measuring coil (6) is drawn from end cap.
2. a kind of low-frequency magnetic sensor according to claim 1, it is characterised in that bar magnet (3) is supported in tubular shell by the implant (4) between bar magnet and tubular housing inner wall, and this implant is paraffin.
3. a kind of low-frequency magnetic sensor according to claim 1 and 2, it is characterised in that bar magnet (3) is DT4E bar magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620172716.4U CN205404774U (en) | 2016-03-08 | 2016-03-08 | Low frequency magnetic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620172716.4U CN205404774U (en) | 2016-03-08 | 2016-03-08 | Low frequency magnetic sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205404774U true CN205404774U (en) | 2016-07-27 |
Family
ID=56442503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620172716.4U Expired - Fee Related CN205404774U (en) | 2016-03-08 | 2016-03-08 | Low frequency magnetic sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205404774U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112882089A (en) * | 2021-03-12 | 2021-06-01 | 太原美信达科技有限公司 | Earthquake forecasting system based on earth change magnetic field |
-
2016
- 2016-03-08 CN CN201620172716.4U patent/CN205404774U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112882089A (en) * | 2021-03-12 | 2021-06-01 | 太原美信达科技有限公司 | Earthquake forecasting system based on earth change magnetic field |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160727 Termination date: 20190308 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |