201137259 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種落錘裝置，特別是指一種用於防 止二次衝擊而產生振動的防止二次衝擊的落錘裝置。 【先前技術】 表面波 t普試驗法（spectral_anaiysis 〇f surface waves method，SASW)主要是在地表量測表面波的波傳信號用以 分析求解受測土層的層狀及各層的剪力波速等。 ，閱圖1以表面波§普5式驗法為例，主要是在土層u 的表面女裝至少兩個收波器（receiver) 12，及一個錘墊13， 然後，以-個落錘Η相對該錘墊13墜落而衝擊地表，使 地表產生應力波在土層U内傳播，藉此，只需收集該等收 波器12谓測同-震源時的的時域信號，就可以利用頻率域 法（頻譜分析）推求雷利波（Raleigh啊）相速度⑽阶BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drop weight device, and more particularly to a drop hammer device for preventing secondary impact from being generated by a secondary shock. [Prior Art] The surface wave-wave test method (SASW) is mainly used to measure the surface wave wave signal on the surface to analyze the layered layer of the soil layer and the shear wave velocity of each layer. . Figure 1 takes the surface wave § 5 test as an example, mainly on the surface of the soil u, at least two receivers 12, and a hammer pad 13, and then, with a drop hammer Η The hammer pad 13 falls and impacts the surface, and the stress wave generated on the surface propagates in the soil layer U. Therefore, it is only necessary to collect the time domain signal when the equalizer 12 is said to be the same as the source. Frequency domain method (spectral analysis) deduces the Rayleigh wave phase rate (10)
vei〇clty)與視波長（app_twaveiength)間之關係進而計算 出土層11的IT力波速’並反算推估地層内的材料性質與特 性（剪力模數及地層内分層層厚等）。 依據前述，表面波譜法A _ .. . ^ _ 曰2C芍簡便、快速又經濟之非破 壞震測試驗，惟當'^落键1 4 — 氓田这洛錘14每一次衝擊該錘墊13時，都 會因為反作用力而產生彈跳，士 匕有二次衝擊的現象，使該等 收波器12除了接收到主靈、、 ^ 彳蕙源的時域信號外，也會接收到雜 sfl ’有相互干擾的情形，推& 1 _ 進而影響到試驗結果及準確性。 【發明内容】 因此，本發明之目的 即在提供一種可以有效提升試 201137259 驗準確性的防止二次衝擊的落錘裝置β 於是，本發明的防止二次衝擊的落錘裝置，包含至少 一磁性元件’及一落鍾。該磁性元件貼近—也表。該落鐘 相對該磁性元件墜落而衝擊地表，且受到該磁性元件的磁 力作用，吸附在該磁性元件上。 本發明的功效是以該磁性元件吸附墜落的落錘，使該 落錘穩定於該磁性元件上，防止該落錘因為彈跳而干擾震 源汛號，進而能提升非破壞震測試驗（如表面波譜法， Spectral-analysis-0f-surface_waves meth〇d，SASW)的精準度 【實施方式】 有關本發明之前述及其他技術内I、特點與功效，在 以下配合參考圖式之一較佳實施例的詳細說明中，將可清 楚的呈現。 參閱圖2、@ 3,本發明防止二次衝擊的落鍾裝置的一 較佳實施例包含-載體2、_限位件3、—磁性單元4，及 一落鐘5。 該載體2在本較佳實施例為一圓盤。 該限位件3在本較佳實施例為沿垂直方向延伸的一桿 件，並具有固設在該载冑2中心的—第—端31，及反向於 該第一端31的一第二端32。 該磁性單元4具有-磁性元件41、一蓄電池42，及一 電源開關43 1磁性元件41在本較佳實施例為固設在該載 體2的-電磁鐵，並具有供該限位件3穿經的—穿孔川。 201137259 該蓄電池42用於供應該磁性元件41產生磁場所需的電流 。該電源開關43電連接該蓄電池42與該磁性元件4丨，且 用於控制電流開啟及關閉。 該落錘5具有沿垂直方向貫穿且供該限位件3穿經的 一貫孔51。 試驗時’只需開啟該電源開關43，使該蓄電池42供應 該磁性元件41產生磁場所需的電流，藉此，當該落錘$由 鄰近该第一端3 2的尚處沿該限位件3相對該載體2墜落時 ，就會在衝擊該載體2的瞬間，受到該磁性元件41的磁場 作用，吸附在該磁性元件41上，避免彈跳的情形。 衝擊後’只需關閉該電源開關43，就可以解除磁場， 使該落鍾5能夠脫離該磁性元件41，及沿該限位件3回覆 至高處，用以進行下一次試驗。 據上所述可知’本發明之防止二次衝擊的落錘裝置具 有下列優點及功效： 1、 本發明可以藉由磁吸作用，使墜落的落錘5穩定於 該磁性元件41上，防止該落錘5因為彈跳而干擾震源訊號 ’進而能提升非破壞震測試驗（如表面波譜法，spectral_ analysis-of-surface-waves method, SASW)的精準度。 2、 本發明不但構造簡單、使用操作相當容易，且該限 位件3的設置，可以限止該落錘5維持垂直方向墜落，提 升該落鐘5墜落時的穩定度’使本發明更具有實用性及方 便性。 惟以上所述者’僅為本發明之較佳實施例而已，當不 201137259 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一示意圖，說明一般的落錘裝置。 圖2是一立體圖，說明本發明 个赞月防止二次衝擊的落錘 裝置的一較佳實施例；及 圖3是該較佳實施例的一正視圖。 201137259 【主要元件符號說明】 2 ..........載體 3 ..........限位件 31 .........第一端 32 .........第二端 4 ..........電磁單元 41 .........磁性元件 42 .........蓄電池 43 .........電源開關 5 ..........落錘The relationship between the vei〇clty) and the apparent wavelength (app_twaveiength) is used to calculate the IT force wave velocity of the soil layer 11 and to inversely evaluate the material properties and characteristics (shear modulus and layer thickness in the formation) in the formation. According to the foregoing, the surface spectroscopy method A _ .. . ^ _ 曰 2C 芍 is a simple, fast and economical non-destructive vibration test, but when the '^ 落 key 1 4 — 氓田 this hammer 14 hits the hammer pad 13 each time. At the same time, the bounce will occur due to the reaction force, and the gentry has a secondary impact phenomenon, so that the receiver 12 receives the time domain signal of the main spirit, and the source, and also receives the miscellaneous sfl ' In the case of mutual interference, push & 1 _ further affects the test results and accuracy. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a falling weight device for preventing secondary impact which can effectively improve the accuracy of test 201137259. Thus, the fall arrest device for preventing secondary impact of the present invention includes at least one magnetic The component 'and a falling clock. The magnetic element is close - also in the table. The drop clock collides with the magnetic member to impact the surface, and is attracted to the magnetic member by the magnetic force of the magnetic member. The effect of the invention is that the magnetic element adsorbs the falling weight of the falling object, so that the falling weight is stabilized on the magnetic element, preventing the falling hammer from interfering with the source nickname due to bounce, thereby improving the non-destructive seismic test (such as surface spectroscopy) The accuracy of the method, Spectral-analysis-0f-surface_waves meth〇d, SASW) [Embodiment] The foregoing and other technical I, features and effects of the present invention are as follows with reference to a preferred embodiment of the reference figure. In the detailed description, it will be clearly presented. Referring to Figures 2 and @3, a preferred embodiment of the fall arresting device for preventing secondary impact of the present invention comprises a carrier 2, a limiting member 3, a magnetic unit 4, and a falling clock 5. The carrier 2 is a disk in the preferred embodiment. The limiting member 3 is a rod extending in the vertical direction in the preferred embodiment, and has a first end 31 fixed to the center of the carrier 2 and a first end opposite to the first end 31 Two ends 32. The magnetic unit 4 has a magnetic element 41, a battery 42, and a power switch 43. The magnetic element 41 is an electromagnet fixed to the carrier 2 in the preferred embodiment, and has a limiting member 3 for wearing. The passage of the perforation. 201137259 The battery 42 is used to supply the current required by the magnetic element 41 to generate a magnetic field. The power switch 43 is electrically connected to the battery 42 and the magnetic element 4, and is used to control current opening and closing. The drop hammer 5 has a constant hole 51 penetrating in the vertical direction and passing through the stopper 3. During the test, it is only necessary to turn on the power switch 43 so that the battery 42 supplies the current required for the magnetic element 41 to generate a magnetic field, whereby when the drop weight is adjacent to the first end 32, along the limit When the member 3 falls with respect to the carrier 2, it is subjected to the magnetic field of the magnetic member 41 at the moment of impacting the carrier 2, and is attracted to the magnetic member 41 to avoid bounce. After the impact, the magnetic field is turned off, and the magnetic field can be released, so that the falling clock 5 can be separated from the magnetic element 41 and returned to the upper portion along the limiting member 3 for the next test. According to the above description, the falling hammer device for preventing secondary impact of the present invention has the following advantages and effects: 1. The present invention can stabilize the falling drop hammer 5 on the magnetic member 41 by magnetic attraction, thereby preventing the The drop hammer 5 interferes with the source signal due to bounce and can improve the accuracy of the non-destructive seismic test (such as surface_analysis-of-surface-waves method, SASW). 2. The invention is not only simple in structure, but also easy to use, and the setting of the limiting member 3 can limit the falling of the falling hammer 5 to maintain the vertical direction and improve the stability when the falling clock 5 falls. Sex and convenience. However, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the practice of the present invention, that is, the simple equivalent changes made by the scope of the invention and the description of the invention. Modifications are still within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a general drop weight device. Figure 2 is a perspective view showing a preferred embodiment of the falling weight device for preventing a secondary impact of the present invention; and Figure 3 is a front elevational view of the preferred embodiment. 201137259 [Description of main component symbols] 2 .......... Carrier 3 .......... Limiting member 31 ......... First end 32 ... ...the second end 4 ..........electromagnetic unit 41 ......... magnetic element 42 ... ... battery 43 .... ..... power switch 5 .......... drop hammer
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