201104249 六、發明說明： 【發明所屬之技術領域】 本發明係有關於—種磁隙式渴電流探頭，尤指涉及 ^一特定麟，_係如補_觸_使之有更 析力及更小結構，更有利於在弯曲之管内、外移動 ^ 近於終端探啦。 達成更趨 【先前技術】201104249 VI. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a magnetic gap type thirst current probe, especially to a specific lining, which is more analytic and more The small structure is more conducive to moving inside and outside the curved tube. Achieve more [previous technology]
頭，如按^^遍型式⑽電流探娜分躺對核差動式探 ^於=物外表喊魄面上，具妹其齡、廉價^ 勝任-般朗之優點，而，在某些檢測條件下，其也受到物 理特性之限制’例如：邊緣效應，惟以破損核燃料棒而言，盆 諸多缺陷卻也在燃料棒之兩終端產生。 /、 再者，採用空氣芯之線圈3，其繞線醜多，因此線圈3 内阻向，其等效電路如第6圖所示，由於其渦f流感應產生之 ，響區域面積大’而為了避免線__間之互感效應，勢必 传加大兩線關之雜，因此其探猶觀尺梢小有限。惟， 檢驗之目的乃在於精確歧該檢測物似好翁其缺陷，致需 要修理、塞住或更換之；並且，量度探頭需充分小，俾可伸進， 並移動通過該檢_之所有部份，尤其係管之料部份。然而 以上述習知技躺言’礙於其探頭尺寸縮小雜，因此對於待 測物之所有部份探财其有限，又’探頭㈣於管壁之期間 中’由於線目之間之互紐亂，使得雜齡轉於管内之期 間中所執行之量度或所供應之峨^能精確侧及決定管壁 201104249 陷’因而無法有效提高其鑑別能力。故，-般習用者 糸…、法符合使用者於實際使用時之所需。 【發明内容】 ㈣月之主要目的係在於，克服習知技藝所遭遇之上述問 喊並^供—種可更趨近於管壁終端行探測而提高鑑別力者。 本發明之次要目_在於，提供 並視需求窄缝财㈣峨高騎/。了…狹乍’ 之之!-目的係在於’提供—種影響叫彳'，使生成 之属机感應可儘可能地趨近於待測物之終端者。 互感提供—觀有贿錄圈間之 ==咖x咖綱㈣㈣作移動者。 f ά 目的係在於，提供一種使用高導磁鐵芯以減 少繞線圈數，進而降低線__具有高Q值者 咸 、南用2達=上之目的’本發明係一種磁隙式渦電流探頭，係可 適用於-待測物之管内、外面趨 有-高導磁鐵芯、—激磁㈣ ：k探顺缺陷者，其包括 忖古墓咖W 支樓構件及一偵測機構。其 上，^繞設於該高導磁鐵芯 設該高導磁鐵芯之激磁線圈3=應；該支稽構件係提供繞 =场線圈使之產生两頻磁場，掏取其訊號並分析該待測物之 錯以上述各耕組成，提供_特定磁路俾該環形磁隙限 201104249 制磁場範圍使之更有利於在該彎曲之棒管内、外移動，以達成 可更趨近於管壁終端行探測而提高鐘別力者。 【實施方式】 。月參閱『第1圖〜第3圖』所示’係分別為本發明之管外 面檢測示_、本㈣之如面檢啦本發明之 ，意圖。如圖所示：本發明係一種磁隙式渴電流探頭，係可 待測物2之管内、外面趨近終端探測其缺陷者，其包 有-南導磁鐵芯1i、一激磁線圈工2、一支 一偵測機構14。 干丄d及 #該高導磁鐵芯11係呈馬蹄型環繞於該待測物2周圍，且 面對該待測物2之表面上係具有一環形磁隙丄丄工。 該激磁線圈12係繞設於該高導磁鐵芯工工上並夢以談 環形磁隙111面對該待測物2露出僅有之 ^ : 該待測物2内產生渦電流感應。 糸用以在 該支撐構件13係提供繞設該高導磁 圈12套置固定。 义教磁、線 該偵測機構14係激勵該激磁線圈丄2使之產生高頻磁 琢，操取其訊號並分析該待測物2之阻抗。以上所述， 一全新之磁隙式渦電流探頭。 當本發明於運用時，係以核燃料棒管為其待測物2， 適用於其棒管外面（如第1騎示）及内面（如第2圖所亍） 進行檢測，其中’該高導磁鐵芯11之環形磁隙11 i係可視 使用者需求以非常狹窄之_米（μπ〇為其形式者。於一較 佳實施例中，當該激磁線圈1 2被該_機構i 4輸出之高頻 201104249 電流激發時’其各線圈係分別感應待測物而產生一相對應之阻 抗，利用處理所取樣之訊號檢測該激磁線圈2 2阻抗變化，進 而判斷此燃料棒管2是否有如穿孔及裂縫或組織、材質變化等 之缺陷。 由上述可知’本發明社述各元件喊，鑛磁線賴設 在具有環形磁隙之高導磁鐵芯上，可提供一特定磁路，俾該環 形磁隙限獅場範圍，與習知技術相較，本發明具有下列數項 之優點，包括： 、 (1) 高解析，其磁隙可以非常齡，並視f求窄至數帅； (2) 影響區域小，其生成之渦流感應可儘可能地趨近於 待測物之終端； ' 、（3)有效降低線圈間之互感，可提供更高之鑑別力，同 時並可減少兩線圈之距離’進而達到縮小探頭外觀尺寸，以更 有利於在彎曲之管内、外作移動；以及 (4)南p值本發明使用向導磁鐵芯，可減少繞線圈 數，進而降低線圈内阻。 综上所述，本發明係一種磁隙式渦電流探頭，可有效改善 習用之種種缺點，係提供-特定磁路，俾磁_制磁 之影響區域縮小並降低線_之互感及其内阻，於減縮兩線圈 之距離進而縮小探頭外觀尺寸時，可更有利於在彎曲之棒管 内、外移動，以達成可更趨近於管壁終端行探測而提高鑑別力 者，進而使本發明之產生能更進步、更實用、更符合使用者之 所須’確已符合鮮專利申請之要件’爰依法提出專利申請。 惟以上所述者’僅為本發明之較佳實施例而已，當不能以 此限定本發明實施之細；故，凡依本侧帽專利範圍及發 201104249 明說明書内容所作之簡單的等效變化與修飾，皆應仍屬本發明 專利涵蓋之範圍内。 【圖式簡單說明】 第1圖，係本發明之第一實施例示意圖。 第2圖，係本發明之第二實施例示意圖。 第3圖，係本發明之等效電路示意圖。 第4圖，係習用之管外面檢測示意圖。 φ 第5圖，係習用之管内面檢測示意圖。 第6圖，係習用之等效電路示意圖。 【主要元件符號說明】 ' (本發明部分） - 高導磁鐵芯11 環形磁隙111 激磁線圈12 φ 支撐構件13 偵測機構14 待測物2 (習用部分） 線圈3 待測物4Head, such as pressing ^^ pass type (10) current 娜 分 对 对 对 对 对 对 对 对 对 对 对 对 对 对 对 对 对 对 对 对Under the conditions, it is also limited by physical characteristics 'for example: edge effect, but in the case of broken nuclear fuel rods, many defects of the basin are also produced at the two terminals of the fuel rod. /, Furthermore, the coil 3 of the air core is used, and its winding is ugly, so the internal resistance of the coil 3 is as shown in Fig. 6, and the area of the sounding area is large due to the eddy f flow induction. In order to avoid the mutual inductance effect between the lines __, it is bound to increase the complexity of the two lines, so it is limited to the small size. However, the purpose of the test is to accurately identify the defect of the test object, which requires repair, plugging or replacement; and the measuring probe needs to be sufficiently small to extend into and move through all parts of the test. Parts, especially the part of the tube. However, in the above-mentioned conventional technique, it is said that the size of the probe is reduced, so that it is limited for all parts of the object to be tested, and the probe (four) is in the middle of the tube wall. The disorder, which makes the measurement performed during the period of turning the tube into the tube or the supplied side can accurately determine the side of the tube wall 201104249 and thus cannot effectively improve its discriminating ability. Therefore, the general practitioners 糸..., the law meets the needs of the user in actual use. SUMMARY OF THE INVENTION (4) The main purpose of the month is to overcome the above-mentioned challenges encountered by the prior art and to improve the discriminating power by approaching the detection of the terminal end of the pipe wall. The secondary objective of the present invention is to provide and to narrow the wealth (four) 峨 high ride / depending on the demand. The narrow-minded one--the purpose is to provide a kind of influence, so that the generated machine-like induction can be as close as possible to the terminal of the object to be tested. Mutual Sense is provided - the view of the bribes between the circles == coffee x café (four) (four) as a mover. f ά The purpose is to provide a magnetic core eddy current probe using a high-conducting magnetic core to reduce the number of windings, thereby reducing the line __ having a high Q value and salting the south. It can be applied to the inside of the tube of the object to be tested, and there is a high-conducting magnetic core, and the excitation (four): k is faulty, including the member of the ancient tomb, and a detecting mechanism. The excitation coil 3 is disposed on the high-conducting magnetic core of the high-conducting magnetic core; the supporting member provides a two-frequency magnetic field around the field coil, extracts the signal and analyzes the waiting The error of the measured object is composed of the above various tillages, providing a specific magnetic circuit, the annular magnetic gap limit 201104249, the magnetic field range is more favorable to move inside and outside the curved rod tube, so as to achieve closer to the end of the tube wall Improve the bell force by detecting. [Embodiment] For the month, refer to the "1st to 3rd drawings", which are the inspections of the outer surface of the tube of the present invention, and the present invention is intended to be inspected. As shown in the figure: The present invention is a magnetic gap type thirst current probe, which is a device that can detect defects in the tube and the outside of the tube of the object to be tested 2, and includes a south magnetic core 1i and an exciting coil 2 A detection mechanism 14 is provided. The high-conducting magnetic core 11 is surrounded by the object to be tested 2 in a horseshoe shape, and has a ring-shaped magnetic gap on the surface facing the object to be tested 2. The exciting coil 12 is wound around the high-conducting magnet core and dreams that the toroidal magnetic gap 111 faces the object to be tested 2 to be exposed only ^ : eddy current induction is generated in the object 2 to be tested. The crucible is configured to provide a wrap around the support member 13 around the high magnetic coil 12. The teaching mechanism 14 excites the exciting coil 丄2 to generate high frequency magnetic enthalpy, operates its signal and analyzes the impedance of the object 2 to be tested. As mentioned above, a new magnetic gap eddy current probe. When the present invention is applied, the nuclear fuel rod tube is used as the object to be tested 2, and is applied to the outside of the rod tube (such as the first riding) and the inner surface (as shown in Fig. 2) for testing, wherein the high guiding The annular magnetic gap 11 i of the magnetic core 11 can be in the form of a very narrow _ m (μπ〇), in a preferred embodiment, when the excitation coil 12 is output by the _ mechanism i 4 High frequency 201104249 When the current is excited, the coils respectively sense the object to be tested to generate a corresponding impedance, and the signal sampled by the process is used to detect the impedance change of the exciting coil 2, thereby determining whether the fuel rod tube 2 has a perforation or the like. Defects such as cracks, changes in structure, material, etc. As can be seen from the above, the components of the present invention are shouted, and the magnetic flux is placed on a high-conducting magnetic core having a toroidal magnetic gap to provide a specific magnetic circuit. Compared with the prior art, the present invention has the following advantages, including: (1) high resolution, the magnetic gap can be very old, and the narrowness is as small as the number; (2) The area of influence is small, and the generated eddy current induction is exhausted. Can be closer to the terminal of the object to be tested; ', (3) effectively reduce the mutual inductance between the coils, can provide higher discriminating power, and can reduce the distance between the two coils, thereby reducing the size of the probe to make it more advantageous For moving inside and outside the curved tube; and (4) South p value, the present invention uses a guide magnetic core to reduce the number of windings and thereby reduce the internal resistance of the coil. In summary, the present invention is a magnetic gap eddy current. The probe can effectively improve various shortcomings of the conventional use, and provides a specific magnetic circuit, and the influence area of the magneto-magnetic system is reduced and the mutual inductance and the internal resistance of the line are reduced, and when the distance between the two coils is reduced and the appearance size of the probe is reduced, It can be more beneficial to move inside and outside the curved rod tube, so as to achieve the detection function which can be closer to the end of the tube wall to improve the discriminating power, thereby making the invention more progressive, more practical and more suitable for the user. It is necessary to 'have met the requirements of the fresh patent application'. The patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and the details of the implementation of the present invention are not limited thereto; The simple equivalent changes and modifications made in accordance with the scope of the patents of the side caps and the contents of the specification of the present invention are still within the scope of the patent of the present invention. [Simplified description of the drawings] Figure 1 is the first of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 2 is a schematic view of a second embodiment of the present invention. Fig. 3 is a schematic diagram of an equivalent circuit of the present invention. Fig. 4 is a schematic view of the outside of the tube for use. φ Fig. 5, is a conventional use Schematic diagram of the inner surface of the tube. Figure 6 is a schematic diagram of the equivalent circuit. [Main component symbol description] ' (Invention part) - High-conducting magnetic core 11 Annular magnetic gap 111 Excitation coil 12 φ Support member 13 Detection mechanism 14 DUT 2 (customized part) Coil 3 DUT 4