CN103207374A - Device and method for detecting analysis of magnetism of building material - Google Patents
Device and method for detecting analysis of magnetism of building material Download PDFInfo
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- CN103207374A CN103207374A CN2013100711102A CN201310071110A CN103207374A CN 103207374 A CN103207374 A CN 103207374A CN 2013100711102 A CN2013100711102 A CN 2013100711102A CN 201310071110 A CN201310071110 A CN 201310071110A CN 103207374 A CN103207374 A CN 103207374A
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Abstract
The invention discloses a device for detecting analysis of magnetism of a building material. The device comprises a magnetic field gradiometer, a data recorder, a non-magnetic table, a magnetizing coil, a magnetizing power supply, a non-magnetic base plate and building material sampling boxes, wherein the magnetizing coil is arranged on the non-magnetic table, the magnetizing power supply is connected with the magnetizing coil, the non-magnetic base plate is arranged on the non-magnetic table, the magnetic field gradiometer is arranged at the bottom of the non-magnetic table and is located under the non-magnetic base plate, a signal output end of the magnetic field gradiometer is connected with a signal input end of the data recorder, and building material sampling boxes are arranged in an inner ring of the magnetizing coil and on the upper surface of the non-magnetic base plate respectively. The device has the advantages of being convenient, quick and high in detection precision.
Description
Technical field
The present invention relates to the demagnetization technical field, refer to a kind of building materials magnetic detection analytical equipment and method particularly.
Technical background
For low magnetic buildingss such as degaussing stations, magnetic field observation chambers, need to adopt the building materials of low magnetic.Past usually carries out to the building materials of different manufacturers, different location that magnetic field intensity detects and relatively, chooses minimum a kind of of magnetic, building materials is carried out strict low magnetic control, and will often take a sample test it, to guarantee to satisfy overall magnetic requirement.Obviously, do like this and mainly have following two problems:
The first, building materials magnetic index is limited unlimitedly, can cause the difficulty of building materials selection and increasing considerably of engineering-built cost.
Second, whether the space magnetic field that can't know buildings before construction engineering demands, in the past in order to check the space magnetic field of non-magnetic building of building with the low magnetic building materials engineering demands that whether distributes, in work progress, must be regularly the irony construction apparatus of construction area and equipment be shifted out the construction area and carry out magnetic field detection, and then revise technical indicator and the technology of low magnetic control.This makes that not only the detection of low magnetic region space magnetic field is very difficult, and has influenced the engineering construction progress.Particularly under very nervous situation of construction period, want to shift out the irony preparation of construction regularly and carry out magnetic detection difficulty especially.Therefore, this traditional way is difficult to implement, and in the work progress of low magnetic region, also is difficult to the magnetic of quantitative detecting analysis building materials at present.
In addition, detect according to the magnetic of existing method to building materials, need to measure the building materials distortion of field of a distance on every side, judge according to distortion of field value whether the magnetic of building materials meets the requirements then.This testing process is subjected to the influence (for example, the terrestrial magnetic field fluctuation) that environmental magnetic field changes easily, causes the testing result distortion easily.
List of references 1: the three-dimensional geologic magnetic field gradient calculates theory and method, Yao Changli, Guan Zhining, Chinese science (D collection), the 27th the 2nd phase of volume, 1997 the 04 month (page number: 103～108).In the document write up with the anti-method of inquiring into the magnetization that construction material sample of magnetic field gradient data.
List of references 2: the electromagnetic field in the geophysics is just being drilled and inverting, the soup field with "nine squares", Ren Zhengyong, change uncommon auspicious, Advances in Geophysics, the 22nd volume, the 4th phase, in August, 2007 (the page number: 1181～1194).In the document write up according to anti-value of pushing away of the construction material sample magnetization, calculate the method that adopts this building materials to build up the magnetic signature of buildings according to numerical analysis methods such as integral equation method or finite element methods.
Summary of the invention
It is a kind of convenient and swift that purpose of the present invention will provide exactly, building materials magnetic detection analytical equipment and method that accuracy of detection is high.
For realizing this purpose, the building materials magnetic detection analytical equipment that the present invention is designed, it is characterized in that: it comprises magnetic field gradient meter, datalogger, no magnetic table, be arranged on the magnetizing coil on the no magnetic table, the excitation supply that is connected with magnetizing coil, be arranged on the no magnetic backing plate on the no magnetic table, wherein, the table end of described no magnetic table, arrange magnetic field gradient meter, described magnetic field gradient meter be positioned at no magnetic backing plate under, the signal output part of described magnetic field gradient meter is connected with the signal input part of datalogger, and it also comprises the building materials sampling box that can be separately positioned on magnetizing coil inner ring and no magnetic backing plate upper surface.
In the technique scheme, it also comprises support, and described magnetic field gradient meter connects ground by support.
The top of described magnetic field gradient meter is 0.1m ~ 0.3m apart from the distance range of no magnetic backing plate.
Described building materials sampling box is the square sampling box, and the side size range of described square sampling box is 0.1 ~ 1.5m.
The inner magnetizing field scope that produces of described magnetizing coil is 10000 ~ 50000A/m.
Described magnetic field gradient meter highly sensitive in 1nT/m.
A kind of building materials magnetic detection analytical approach of utilizing above-mentioned building materials magnetic detection analytical equipment is characterized in that it comprises the steps:
Step 1: construction material sample is placed in the building materials sampling box, then the building materials sampling box is placed the magnetizing coil inner ring;
Step 2: the operation excitation supply feeds current impulse to magnetizing coil construction material sample is magnetized;
Step 3: the building materials sampling box that construction material sample is housed after will being magnetized places on the no magnetic backing plate, measures the magnetic field gradient of construction material sample in the building materials sampling box with the magnetic field gradient meter of no magnetic backing plate below;
Step 4: the magnetic field gradient around the construction material sample that detects according to magnetic field gradient meter, and the magnetic field gradient data are sent to datalogger, adopt the anti-magnetization that construction material sample of inquiring into after the magnetic field gradient data in the reads data log instrument;
Step 5: according to anti-value of pushing away of the construction material sample magnetization, calculate the magnetic signature that adopts the buildings that this building materials builds up according to integral equation method or finite element method, namely finished the analysis of building materials magnetic detection.
When construction material sample was magnetized described in the step 2, scope conduction time of magnetizing coil was 2 ~ 60s.
When using magnetic field gradient meter to measure the magnetic field gradient of construction material sample in the building materials sampling box, the testing staff is from the distance of magnetic field gradient meter 3m at least in the step 3.
The present invention is by detecting the magnetic field gradient of construction material sample a distance, the influence that can avoid environmental magnetic field to change, and adopt anti-pushing manipulation can obtain the magnetization of construction material sample, utilize the anti-value of pushing away of this magnetization then, can set up the magnetic of the buildings that this building materials builds up, predict that its magnetic signature distributes, and is particularly suitable for the construction of low magnetic buildings.Realized in the work progress of low magnetic region, carrying out quantitative detection analysis to the magnetic of building materials.The present invention possesses convenient and swift, the advantage that accuracy of detection is high.
Description of drawings
Fig. 1 is the structural representation of structure division of the present invention;
Among the figure, 1-no magnetic table, 2-building materials sampling box, 3-magnetizing coil, 4-excitation supply, 5-magnetic field gradient meter, 6-datalogger, 7-no magnetic backing plate, 8-support.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments:
Building materials magnetic detection analytical equipment as described in Figure 1, it comprises magnetic field gradient meter 5, datalogger 6, no magnetic table 1, be arranged on the magnetizing coil 3 on the no magnetic table 1, the excitation supply 4 that is connected with magnetizing coil 3, be arranged on the no magnetic backing plate 7 on the no magnetic table 1, wherein, the table end of no magnetic table 1, arrange magnetic field gradient meter 5, magnetic field gradient meter 5 be positioned at no magnetic backing plate 7 under, the signal output part of magnetic field gradient meter 5 is connected with the signal input part of datalogger 6, and it also comprises the building materials sampling box 2 that can be separately positioned on magnetizing coil 3 inner rings and no magnetic backing plate 7 upper surfaces.When construction material sample was magnetized, building materials sampling box 2 was positioned at magnetizing coil 3 inner rings; When measuring the magnetic field gradient of construction material sample, building materials sampling box 2 is positioned at no magnetic backing plate 7 upper surfaces.
In the technique scheme, it also comprises support 8, and described magnetic field gradient meter 5 connects ground by support 8.
In the technique scheme, the top of magnetic field gradient meter 5 is 0.1m ~ 0.3m apart from the distance range of no magnetic backing plate 7.
In the technique scheme, building materials sampling box 2 is the square sampling box, and the side size range of square sampling box is 0.1 ~ 1.5m.The length of side for a small amount of construction material sample square sampling box is chosen as 0.1m, is chosen as 1.5m for the length of side of large construction material sample square sampling box.
In the technique scheme, the magnetizing coil 3 inner magnetizing field scopes that produce are 10000 ~ 50000A/m.This magnetizing field scope can contain all building materialss of magnetization.
In the technique scheme, the sensitivity of magnetic field gradient meter 5 should be higher than 1nT/m.
A kind of building materials magnetic detection analytical approach of utilizing above-mentioned building materials magnetic detection analytical equipment, it comprises the steps:
Step 1: construction material sample is placed in the building materials sampling box 2, then building materials sampling box 2 is placed magnetizing coil 3 inner rings;
Step 2: operation excitation supply 4 magnetizes for magnetizing coil 3 feeding current impulses to construction material sample;
Step 3: the building materials sampling box 2 that construction material sample is housed after will being magnetized places on the no magnetic backing plate 7, measures the magnetic field gradient of construction material sample in the building materials sampling box 2 with the magnetic field gradient meter 5 of no magnetic backing plate 7 belows;
Step 4: the magnetic field gradient around the construction material sample that detects according to magnetic field gradient meter 5, and the magnetic field gradient data are sent to datalogger 6, adopt the anti-magnetization that construction material sample of inquiring into after the magnetic field gradient data in the reads data log instrument 6; See that the three-dimensional geologic magnetic field gradient calculates theory and method, Yao Changli, Guan Zhining, Chinese science (D collection), the 27th the 2nd phase of volume, 1997 the 04 month (page number: 103～108).
Step 5: according to anti-value of pushing away of the construction material sample magnetization, calculate the magnetic signature that adopts the buildings that this building materials builds up according to existing integral equation method or finite element method, namely finished the analysis of building materials magnetic detection.Electromagnetic field in the insight ball physics is just being drilled and inverting, the soup field with "nine squares", Ren Zhengyong, change uncommon auspicious, Advances in Geophysics, the 22nd volume, the 4th phase, in August, 2007 (the page number: 1181～1194).
When construction material sample was magnetized in the step 2 of technique scheme, scope conduction time of magnetizing coil 3 was 2 ~ 60s.Guarantee that construction material sample is fully magnetized.
When using magnetic field gradient meter 5 to measure the magnetic field gradient of construction material sample in the building materials sampling boxes 2, the testing staff is from the distance of magnetic field gradient meter 5 3m at least in the step 3 of technique scheme.Prevent the magnetic interference that the entrained ferromagnetic object of testing staff self produces.
The content that this instructions is not described in detail belongs to this area professional and technical personnel's known prior art.
Claims (9)
1. building materials magnetic detection analytical equipment, it is characterized in that: it comprises magnetic field gradient meter (5), datalogger (6), no magnetic table (1), be arranged on the magnetizing coil (3) on the no magnetic table (1), the excitation supply (4) that is connected with magnetizing coil (3), be arranged on the no magnetic backing plate (7) on the no magnetic table (1), wherein, the table end of described no magnetic table (1), arrange magnetic field gradient meter (5), described magnetic field gradient meter (5) be positioned at no magnetic backing plate (7) under, the signal output part of described magnetic field gradient meter (5) is connected with the signal input part of datalogger (6), and it also comprises the building materials sampling box (2) that can be separately positioned on magnetizing coil (3) inner ring and no magnetic backing plate (7) upper surface.
2. building materials magnetic detection analytical equipment according to claim 1, it is characterized in that: it also comprises support (8), described magnetic field gradient meter (5) connects ground by support (8).
3. building materials magnetic detection analytical equipment according to claim 2, it is characterized in that: the top of described magnetic field gradient meter (5) is 0.1m ~ 0.3m apart from the distance range of no magnetic backing plate (7).
4. building materials magnetic detection analytical equipment according to claim 1, it is characterized in that: described building materials sampling box (2) is the square sampling box, and the side size range of described square sampling box is 0.1 ~ 1.5m.
5. building materials magnetic detection analytical equipment according to claim 1 is characterized in that: the inner magnetizing field scope that produces of described magnetizing coil (3) is 10000 ~ 50000A/m.
6. building materials magnetic detection analytical equipment according to claim 1 is characterized in that: described magnetic field gradient meter (5) highly sensitive in 1nT/m.
7. a building materials magnetic detection analytical approach of utilizing the described building materials magnetic detection of claim 1 analytical equipment is characterized in that it comprises the steps:
Step 1: construction material sample is placed in the building materials sampling box (2), then building materials sampling box (2) is placed magnetizing coil (3) inner ring;
Step 2: operation excitation supply (4) magnetizes for magnetizing coil (3) feeding current impulse to construction material sample;
Step 3: the building materials sampling box (2) that construction material sample is housed after will being magnetized places on the no magnetic backing plate (7), measures the magnetic field gradient of the interior construction material sample of building materials sampling box (2) with the magnetic field gradient meter (5) of no magnetic backing plate (7) below;
Step 4: according to the magnetic field gradient around the construction material sample of magnetic field gradient meter (5) detection, and the magnetic field gradient data are sent to datalogger (6), adopt the anti-magnetization that construction material sample of inquiring into after the magnetic field gradient data in the reads data log instrument (6);
Step 5: according to anti-value of pushing away of the construction material sample magnetization, calculate the magnetic signature that adopts the buildings that this building materials builds up according to integral equation method or finite element method, namely finished the analysis of building materials magnetic detection.
8. building materials magnetic detection analytical approach according to claim 7, it is characterized in that: when construction material sample was magnetized described in the step 2, scope conduction time of magnetizing coil (3) was 2 ~ 60s.
9. building materials magnetic detection analytical approach according to claim 7, it is characterized in that: when using magnetic field gradient meter (5) to measure the magnetic field gradient of construction material sample in the building materials sampling box (2), the testing staff is from the distance of magnetic field gradient meter (5) 3m at least in the step 3.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06123730A (en) * | 1992-10-13 | 1994-05-06 | Kawasaki Steel Corp | Method and apparatus for continuous demagnetization and magnetic flaw detection |
| CN201096749Y (en) * | 2007-11-16 | 2008-08-06 | 横店集团东磁股份有限公司 | Magnetic measuring device |
| DE102007006702A1 (en) * | 2007-02-10 | 2008-08-14 | Airbus Deutschland Gmbh | Fiber composite material component testing method, involves generating and coupling alternating magnetic field into each test object by generator and induction coil, and detecting coupling of respective objects to alternating magnetic field |
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- 2013-03-06 CN CN201310071110.2A patent/CN103207374B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06123730A (en) * | 1992-10-13 | 1994-05-06 | Kawasaki Steel Corp | Method and apparatus for continuous demagnetization and magnetic flaw detection |
| DE102007006702A1 (en) * | 2007-02-10 | 2008-08-14 | Airbus Deutschland Gmbh | Fiber composite material component testing method, involves generating and coupling alternating magnetic field into each test object by generator and induction coil, and detecting coupling of respective objects to alternating magnetic field |
| CN201096749Y (en) * | 2007-11-16 | 2008-08-06 | 横店集团东磁股份有限公司 | Magnetic measuring device |
Non-Patent Citations (2)
| Title |
|---|
| 刘大明 等: "非磁性建筑物空间磁场预测技术", 《海军工程大学学报》, vol. 17, no. 1, 28 February 2005 (2005-02-28) * |
| 赖加成 等: "地磁台站建设中的材料磁性检测", 《地震研究》, vol. 31, no. 2, 30 April 2008 (2008-04-30) * |
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