201212563 六、發明說明： 【發明所屬之技術領域】 本發明係有關於一種高頻訊號傳輸路徑上故障位置之 定位方法’所述的位置就訊號傳輸路徑之高頻傳輸特性而 言是故障的。 【先前技術】 高頻訊號的傳輸路徑，例如行動電話基地台，而兮訊 號傳輸路徑例如包含高頻導線、高頻插接器、一閃電保護 裝置及-用於發送高頻訊號的天線，對高頻傳輸特性的測 1經$出現傳輸能力降低的情況，而頻率越高者，其傳輸 能力降低的情況比根據計算得出的傳輸能力降低結果，= 根據個別元件之高頻傳輸特性而可期待的傳輸能力降低結 果更糟’因此，例如高雜頭沒有完全連接或安裝有誤， 或者高頻導線内出現電線裂痕’在此等故障位置上，尋找 訊號傳輸路徑之整體系統_故障位置極為費時，如此一 來在此位置上會產生非線性的高頻訊號傳輸作用，此功 能會減弱訊號傳輸路徑之整體系統的高頻訊號傳輸特性。 【發明内容】 ^發月之主要目的’在於提供-種高頻訊號傳輸路徑 上故P早位置之定位方法，其中就高頻技術來看，可以簡單 的方式非常精確地確定出訊號傳輸路徑上的故障位置，俾 使更容易找到故障。 本七明阿頻峨傳輪路徑上故障位置之定位 施步驟如下： 201212563 (a) 以一個預定的恆定改變率df/dt，經過由預定之起始頻 率fANFANC到預定之結束頻率fENDE這段時間產生一個第一 高頻訊號，以循環不間斷的重複頻率掃描該第一高頻訊 號的頻率Kt) ’進而達到fl(t) = df/dt*t; (b) 具有-恒定的預定頻率f2，產生—個第二高頻訊號； (C)由第-高親號、第二高親餘生—具#解⑴ 之預疋的父互調變（interm〇duiati〇n pr〇duct); ⑷將第-局頻訊號的頻率f|(t)及第二高頻訊號的頻率& 導入一預定導入點上之訊號傳輸路徑内； (e)在該傳輸路徑上的預定導入點上接收產生具有頻率201212563 VI. Description of the Invention: [Technical Field] The present invention relates to a method for locating a fault location on a high-frequency signal transmission path. The position is faulty with respect to the high-frequency transmission characteristic of the signal transmission path. [Prior Art] The transmission path of a high-frequency signal, such as a mobile phone base station, and the transmission path of the signal includes, for example, a high-frequency wire, a high-frequency connector, a lightning protection device, and an antenna for transmitting a high-frequency signal, The measurement of the high-frequency transmission characteristics is reduced by the transmission capacity of $, and the higher the frequency, the lower the transmission capacity than the calculated transmission capacity, = according to the high-frequency transmission characteristics of the individual components. The expected reduction in transmission capacity is even worse. Therefore, for example, the high miscellaneous head is not completely connected or installed incorrectly, or there is a wire crack in the high-frequency wire. In this fault location, the overall system for finding the signal transmission path is extremely faulty. Time-consuming, in this way, a non-linear high-frequency signal transmission occurs in this position, which weakens the high-frequency signal transmission characteristics of the overall system of the signal transmission path. [Summary of the Invention] The main purpose of the moon is to provide a method for locating the early position of the high-frequency signal transmission path. In the high-frequency technology, the signal transmission path can be determined very accurately in a simple manner. The location of the fault makes it easier to find the fault. The positioning procedure of the fault position on the path of the BenQing A-frequency transmission wheel is as follows: 201212563 (a) At a predetermined constant change rate df/dt, after the predetermined starting frequency fANFANC reaches the predetermined end frequency fENDE Generating a first high frequency signal to scan the frequency of the first high frequency signal Kt) ' at an uninterrupted repetition frequency to reach fl(t) = df/dt*t; (b) having a constant constant frequency f2 , generating a second high frequency signal; (C) a parental intermodulation change (interm〇duiati〇n pr〇duct) by the first-high parent number, the second high-parent--(1); (4) Transmitting the frequency f|(t) of the first-level frequency signal and the frequency & of the second high-frequency signal into a signal transmission path at a predetermined introduction point; (e) receiving and generating at a predetermined introduction point on the transmission path With frequency
Wemp瞻N(t)之交互調變訊號（intennodulation piOduct signal)，該交互調變訊號對應步驟(c)中產生的交互調 變； ⑴碟定步驟(c)中產生的交互調變之頻率與步 驟(e)中同時在各時間點tEMpF接收的交互調變訊號之頻 率WEMPFANGEN(tEMPF)之間的頻率差距f 〇 ; (g)根據步驟⑴確定的頻率差距fD，計算導入點與訊號傳 輸路徑上-個位置之間的長度L，在步驟(e)中接收的訊 號係由所述的位置中產生。 上述方法的優點在於，利用在訊號傳輸路徑之故障位 置^產生較互機’可以非常精確地奴出該位置，而 。不需以機财式處觀號傳輸路徑，制是或破壞訊 ，傳輸路僅，如此—來，可大幅簡化故料找及縮短故障 尋找時間，可以在短時間内確定職傳輸路裡上那個元件 4 201212563 有故障，以及該故障位於該元件那個位置。 皆』路徑包含一特別是以中空導體或同軸電線 貫"的局頻導線、一閃電保護電路、一高頻過遽器、-高 頻線圈電阻及一高頻天線。 在步驟(c)中’產生具有交互調變之鮮f__触攀 或f_瞭⑴=2x跡fl的第三階⑽）之交互調變，並在步驟(e) 中接收該頻率WEMPFANC.2轉f2或 的第三階（IM3)之交互調變’則在簡單的技術結構可以特別 精準地定位。 在步驟(e)中’利用一高麟波器，特別是一帶通滅波 器’將該交互調變從導人點上接收到的訊號中萄出。 在步驟(g)中根據公式：Z = #計算出長度L，可以 特別容易的定位出故障位置，其中c為訊號傳輸路徑上之高 頻訊號的擴散速度，城指步驟⑴中的特定解差距，| 是指步驟(a)中採用之悝定改變率。 為了能更清楚的分辨出已產生及已接收的交互調變， 在步驟⑷中，第一高頻訊號⑽的頻耗⑴在Wang到fEnde 内兩個先後相接的頻率變化之間，在改變速度|下設有一 預定時間△t。 就訊號傳輸路徑之高頻傳輸特性而言是故障的位置， 包含至個位置’在驗置上發生高驗阻的變化，尤 其是尚頻波阻卿，在所述的位置上電性細是故障的， 201212563 特別是存有比敢值獻的_餘，叹麵述的位置 上存在非線性的高頻訊號傳輸作用。 本發明之該“fang數值比fENDE數值小。 【實施方式】 述如下 本發明之實施例，請參閲第一圖所示，係關於一種針 柃影響高頻傳輸特性之故障位置，對訊號傳輸路徑職 仃的刀析’ k些故障位置會造成高頻訊號以非線性做傳輸 ’兩個不同的高頻訊號同時在非線性傳輸作用的一位置上 時’會造成交互輕，*本發明之方法即彻此一特性， 所，的交互霞會在這些位置上產生，非反映錯誤訊號， 而疋當成之前在峨傳輸路㈣上不存在的高頻訊號，該 两頻訊號在崎為交互觀喊，或者也稱為交互調變。 在區塊12 VOC f, ‘‘内會產生隨者時間變化的頻率 ^t)之第一尚頻訊號μ，以一個預定的恆定改變率|，經 過由預定之起始鮮到預定之結束頻率f瞻這段時間 、’循環不間斷的重複掃描該第一高頻峨14的頻率f⑴， 進而達到f,(t) = df/dt*t，該第-高頻訊舰在區塊16 ‘‘ PAfl内會被強化，並被輸送到一組合器18，在區塊20 “ Flx f2 ‘‘内產生-具有恆定的頻率f2之第二高頻訊號22，該 第二高頻喊22在區塊24 “ PA f2 “内會被触，並且同 6 201212563 樣被輸送到該組合器18，將該組合器18組合於一導線上的 第一高頻訊號14及第二高頻訊號22輸送到區塊26，該區塊 26包含一雙聯濾器，並將導入點28上的該第一高頻訊號14 及苐一尚頻訊號22饋入訊號傳輸路梭1〇内，所述的該第一 高頻訊號14及第二高頻訊號22係經由該訊號傳輸路徑丨〇的 路線上，必要時在一個具有非線性傳輸作用的位置上相遇 ，例如一故障的高頻插接器、一劣質的焊接位置或一電線 破裂處’進而會從該第一高頻訊號14及第二高頻訊號22中 產生本身不被希望得到的交互調變，例如第三階（頂3)之 交互調變，這些交互調變以在訊號傳輸路徑上產生的訊號 、或是交互調變、或是交互調變訊號的身份跑回到導入點 28。 透過區塊26同時在導入點28上接收一個在訊號傳輸路 徑10上產生的訊號，並藉由該雙聯濾器，將具有頻率 fM-E_NGEN(t)的第三階（IM3)之交互調變32(intermodulation product)過濾出，並經由一輸出端3〇將該第三階（IM3)之 交互調變32轉送到區塊34 ’接著在區塊36内將第一高頻訊 號的頻率^⑴變為雙倍2吨⑴，在另一區塊38内將該頻率 變雙倍後的第一高頻訊號14與該第二高頻訊號22相混，俾 使最終產生具有頻率flM -ER2EUGT (t)之第三階（IM3)之交互調變 40，因此，所產生的第三階（頂3)之交互調變4〇的頻率 【則順仰(1；)’乃疋根據方程式£丨|\434[^1]〇1'(1；) = 2又1'1(1；)-；['2由第一 g 頻訊號14的頻率wt)與第二高頻訊號22的頻率f2所得出，所 接收到的第三階（IM3)之交互調變32同樣是上述方程式得 201212563 出’不過因為接收到的第三階（鹏）之交互調變32早已經 過導入點28到具有非線性傳輪作用之位置之間的路段L，以 及又從具有非線性傳輸仙之位制導人點28回來的路段 L，所以在訊號傳輸路徑上因運轉時間的不@，而彼此處於 導入點28的時間會先後錯開。 在區塊34内將接收到與產生的第三階之交互調變犯、 40相比較’進而在-特定的a夺間點—，得出產生的第三階 (IM3 )之交互調變40的頻率flM E_GT(t_)與接收到的第三階 (IM3 )之父互s周變32的頻抓彻纖必·)之間的頻率差距 42，並將此頻率差距匕42轉送到區塊44，在區塊私内可 在各接收時間點由頻率差距fD 42計算出距離L，其中c 為訊號傳輸路徑1G上高頻訊號的擴散速度，fD是先前特定的 頻率差距㈣’ i是指_賴财㈣地解掃描之第 一高頻訊號14的怪定改變率，所述的距離L係為導入點28到 第三階(IM3)之交互調變32在訊號傳輸路㈣上由第一高 頻訊號14、第二高頻峨22職生驗置之間⑽段，現 在〜員再將蹄或長度L纽賴輸路測上測量，如此即 I確實找出訊號傳輸路觀上的具有非線性傳輸作用的故 障所在位置’該非線性傳輸作用會影響訊號傳輸__ 口頻傳輸特H ,所^胃故障位置可能是高頻電線的斷裂處、 天線的故障位置或故障的高頻插接器或劣質的焊接處，當 8 201212563 然訊號傳輸路徑上也可能同時出現多個故障位置，在該接 收情況下會產生多個因時間而後先後錯開的交互調變犯 ，這些交互調變32均可同時判斷，進而可確定多個頻率差 距及多個長度L，由於係使用一個新產生的交互調變作為 被當成接收到的訊號嘴可確定長度L僅牽涉到具有非線性 傳輸功能的故障位置，柯是具有其它制或其他來源之 高頻訊號的其他反射。 例如由起始頻率fANFANG=925 MHZ到結束頻率 f_=94G MHz’峨環獨斷地頻率掃描第—高頻訊號14 的值定改變率df/dt，以怪定頻率f2姻MHz產生第二高 頻訊號22 ’藉此在頻率區_黯到91〇驗内產生一相 對應不間斷地掃描頻率，該頻率適用於第三階⑽）之交 互調變，所述的第三階（ |白UM3)之交互調變利用區塊沈内 之雙聯濾器，以相對庫明 _ …月顯較向的功率，可與饋入的第一 同頻§fl5虎14、第二jfj頻却缺fjrj i 負錢22清楚的分離，使得第-高頻 sfl號14、第二高頻訊號2卩 以不會從輸出端30的接收部散佈 〇 如弟一瞒不’橫車M6表示時心，縱轴料示頻率 f，顯示了產生的第三階（IM3)之交互調變4Q的頻率 flM-ERZEUGT(t)以及接收到的第二 率f——)各自的_之交互調變32的頻 以㈣示，频^ _接收時間點“ 〜以52標示，結束頻率f_以 201212563 54標示。 根據第-圖中觸示在產生的第三階（即之交互調 變40與於訊號傳輸路徑1〇上產生的第三階（腦）之交互 調變β32之間的時間偏移分別在一特定時間t· 50知出產生的第二p皆（IM3)之交互調變仙與接收到的第 三階（IM3)之交互調變32之間的頻率差距fD42,在具有 第-高頻訊號14的頻率fl⑴以循環不間斷地頻率掃描之 怪定改變率df/dt為蚊情況下，該頻率差距&犯是恆定 不變的，根據前面提到的方程式，使用該頻率差距L犯 計算長度L。 第-圖、第二圖中所顯示之本創作方法較佳實施例， 使用=三階⑽）的交互調變作為例子，不過也可使用於 其他交互調變，例如第二階㈣⑺匕吨卜⑴或第四 階或更高的交互調變，重要的是產生的交互調變W_CT(t) 與接收到的交互調變fIM_WFANGEN(t)完全相同。 結論是在該傳輸路徑1G外，第—個交互調變32從導 入點28到區塊34及第二個交互調變4〇從區塊邶到區塊 34，父互調變32及交互調變4〇會有不同長度的傳輸路徑 ，且會導致交互調變32及4〇抵達區塊34的傳輸時間不同 ，該變數可以用測量儀器校正來排除。 、’上所述，本發明確實已達到所預期之使用目的與功 效’且更較習知者為之理想、實用，惟，上述實施例僅係 201212563 十.子本發明之|讀1施例進行具體說邮已，此實施例並 非用以限定本發明之申請專利麵，舉凡其它未脫離本發 明所揭示之技術手段下所完成之解變化與修飾，均應包 含於本發明所涵蓋之申請專利範圍中。 【圖式簡單說明】 第一圖所示係為本發明實施例之流程圖。 第二圖所示係為本發明實施例進行訊號檢剛之圖表。 【主要元件符號說明】 10訊號傳輸路徑 12區塊 14第一高頻訊號 16區塊 18組合器 20區塊 22第·一尚頻訊號 24區塊 26區塊 28導入點 30輸出端 32交互調變 34區塊 36區塊 38區塊 40交互調變 42頻率差距 44區塊 46橫軸 48縱軸 50接收時間點 52起始頻率 54結束頻率 56時間偏移Wemp looks at N(t)'s internnodulation piOduct signal, which corresponds to the interactive modulation generated in step (c); (1) the frequency of interaction modulation generated in step (c) of the disc In step (e), the frequency difference f 〇 between the frequencies WEMPFANGEN (tEMPF) of the intermodulation signal received at each time point tEMpF; (g) calculating the introduction point and the signal transmission path according to the frequency difference fD determined in step (1) The length L between the previous positions, the signal received in step (e) is generated from the position. The advantage of the above method is that the use of the fault location in the signal transmission path can produce a very accurate slave out of the location. There is no need to use the machine to view the transmission path, the system is either destroying the signal, and the transmission path is only so. This can greatly simplify the material search and shorten the fault finding time, and can determine the job transmission path in a short time. Component 4 201212563 is faulty and the fault is at that location. The path includes a local frequency conductor, a lightning protection circuit, a high frequency filter, a high frequency coil resistor and a high frequency antenna, which are particularly hollow conductors or coaxial wires. In step (c), 'generate the alternating modulation of the fresh f__clips with interactive modulation or the third order (10) of f_ (1)=2x trace fl, and receive the frequency WEMPFANC in step (e). 2 to f2 or the third-order (IM3) interactive modulation' can be positioned particularly accurately in a simple technical structure. In step (e), the intermodulation is extracted from the signal received at the lead point by using a high-frequency filter, in particular a band-pass filter. In step (g), the length L is calculated according to the formula: Z = #, and the fault location can be particularly easily located, where c is the diffusion speed of the high-frequency signal on the signal transmission path, and the specific solution gap in the city finger step (1) , | refers to the rate of change used in step (a). In order to more clearly distinguish the generated and received interactive modulation, in step (4), the frequency consumption (1) of the first high frequency signal (10) is changed between two successive frequency changes in Wang to fEnde. There is a predetermined time Δt under Speed|. In the case of the high-frequency transmission characteristic of the signal transmission path, it is a faulty position, including a position where a high-resistance change occurs in the inspection, in particular, a frequency-wave retardation, where the position is electrically thin. Faulty, 201212563 In particular, there is a non-linear high-frequency signal transmission at the position of the sigh. The "fang value of the present invention is smaller than the fENDE value. [Embodiment] Embodiments of the present invention are described below, and refer to the first figure, which relates to a fault location in which a pinhole affects high-frequency transmission characteristics, and signal transmission. The path analysis of the path job 'k some fault positions will cause the high-frequency signal to transmit in a nonlinear way. 'Two different high-frequency signals simultaneously at a position of the nonlinear transmission effect' will cause a light interaction, * the invention The method is to have this characteristic, and the interaction Xia will be generated at these positions, which does not reflect the error signal, and is regarded as a high-frequency signal that does not exist on the transmission path (4) before, and the two-frequency signal is in an interactive view. Shout, or also known as interactive modulation. In block 12 VOC f, '' will generate the frequency of the time change ^t) of the first frequency signal μ, with a predetermined constant rate of change | The scheduled start is fresh to the end of the predetermined frequency f, and the frequency f(1) of the first high frequency 峨14 is repeatedly scanned continuously, and then f, (t) = df/dt*t, the first high The frequency ship will be in block 16 '' PAfl Reinforced and delivered to a combiner 18, generated in block 20 "Flxf2" - a second high frequency signal 22 having a constant frequency f2, the second high frequency shout 22 in block 24 "PA f2 "The inside will be touched, and the same as 6 201212563 is sent to the combiner 18, the first high frequency signal 14 and the second high frequency signal 22 combined with the combiner 18 on a wire are transported to the block 26, which The block 26 includes a double filter, and the first high frequency signal 14 and the first frequency signal 22 on the input point 28 are fed into the signal transmission shuttle 1 , the first high frequency signal 14 And the second high frequency signal 22 is routed through the signal transmission path ,, if necessary, at a position having a nonlinear transmission effect, such as a faulty high frequency connector, a poor quality welding position or a The wire rupture portion will in turn generate an interactive modulation that is not expected from the first high frequency signal 14 and the second high frequency signal 22, for example, the third order (top 3) interaction modulation, these interaction modulation Signals generated on the signal transmission path, or interactive modulation, or interaction Identity change signals run back to import 28 points. Simultaneously receiving a signal generated on the signal transmission path 10 at the lead-in point 28 through the block 26, and interchanging the third order (IM3) having the frequency fM-E_NGEN(t) by the double filter 32 (intermodulation product) filters out, and transfers the third-order (IM3) interactive modulation 32 to the block 34 via an output terminal 3'. Then the frequency of the first high-frequency signal is ^^ in the block 36^(1) It becomes double 2 tons (1), and the first high frequency signal 14 which doubles the frequency in another block 38 is mixed with the second high frequency signal 22, so that finally the frequency flM -ER2EUGT is generated ( t) The third order (IM3) of the alternating modulation 40, therefore, the third order (top 3) of the generated alternating modulation 4 〇 frequency [then sway (1;) ' is based on the equation 丨|\434[^1]〇1'(1;) = 2 and 1'1(1;)-;['2 is the frequency wt of the first g-frequency signal 14) and the frequency f2 of the second high-frequency signal 22 It is concluded that the received third-order (IM3) interactive modulation 32 is also the above equation, which is 201212563. However, because the received third-order (Peng) interactive modulation 32 has already passed the import point 28 to have The link L between the positions of the linear transfer action, and the link L which is returned from the guide point 28 having the non-linear transmission, so that they are at the point of introduction 28 on the signal transmission path due to the non-operation time of the operation time. The time will be staggered. In block 34, the received third-order intermodulation mutator, 40 is compared to 'and then at-specific a-interaction point', and the resulting third-order (IM3) interactive modulation is obtained. The frequency difference between the frequency flM E_GT(t_) and the received third-order (IM3) parent's mutual s-week 32 frequency capture, and the frequency difference 匕42 is forwarded to the block 44. The distance L can be calculated by the frequency difference fD 42 at each receiving time point in the block private, where c is the diffusion speed of the high frequency signal on the signal transmission path 1G, and fD is the previous specific frequency difference (4) 'i refers to _ Lai Cai (4) to solve the strange change rate of the first high-frequency signal 14 scanned, the distance L is the interaction modulation 32 of the introduction point 28 to the third order (IM3) on the signal transmission path (four) by the A high-frequency signal 14 and a second high-frequency 峨22 between the probation and the inspection (10), now the squad will measure the hoof or the length of the L-Nilai transmission, so that I really find out the non-existence of the signal transmission path. The location of the fault caused by linear transmission 'this nonlinear transmission will affect the signal transmission __ the frequency transmission of the special H, the location of the stomach failure may At the break of the high-frequency wire, the fault location of the antenna, or the faulty high-frequency connector or the inferior solder joint, when the 8 201212563 signal transmission path may also have multiple fault locations at the same time, in this case, there will be more Interacting mutations that are staggered by time and then can be judged simultaneously, and thus multiple frequency gaps and multiple lengths L can be determined, since a newly generated interactive modulation is used as received The signal nozzle can determine that the length L only involves fault locations with non-linear transmission functions, and Ke is other reflections with high frequency signals from other sources or other sources. For example, the starting frequency fANFANG=925 MHZ to the ending frequency f_=94G MHz' 频率 独 独 频率 频率 独 独 独 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频 高频The signal 22' thereby generates a corresponding uninterrupted scanning frequency in the frequency region _黯 to 91, which is suitable for the interactive modulation of the third order (10)), the third order (|white UM3) The interactive modulation uses the double filter in the block sink to compare the relative power of the library to the first, and the first frequency of the feed is §fl5 tiger 14, the second jfj frequency is lacking fjrj i negative The money 22 is clearly separated, so that the first-high frequency sfl number 14 and the second high-frequency signal 2 卩 are not scattered from the receiving portion of the output end 30, such as the younger brother, the cross-body M6 indicates the time center, the vertical axis material The frequency f is shown, showing the frequency of the third-order (IM3) cross-modulation 4Q frequency flM-ERZEUGT(t) and the received second rate f-) respective _ of the intermodulation 32 (4) The frequency ^ _ receiving time point " ~ is marked with 52, the ending frequency f_ is marked with 201212563 54. According to the third picture generated in the first picture (ie it The time offset between the intermodulation variable 40 and the third order (brain) interactive modulation β32 generated on the signal transmission path 1〇 is respectively known to be generated at a specific time t·50 (IM3). The frequency difference fD42 between the interactive modulation and the received third-order (IM3) interaction modulation 32, at the frequency fl(1) having the first-high frequency signal 14 to cycle the uninterrupted frequency sweeping rate of change When df/dt is a mosquito, the frequency difference & pun is constant. According to the equation mentioned above, the frequency difference L is used to calculate the length L. The creation shown in the first and second figures The preferred embodiment of the method uses the third-order (10) interactive modulation as an example, but can also be used for other interactive modulations, such as second-order (four) (7) 匕 卜 (1) or fourth-order or higher interaction modulation, It is important that the generated interactive modulation W_CT(t) is identical to the received interactive modulation fIM_WFANGEN(t). The conclusion is that outside the transmission path 1G, the first interactive modulation 32 is from the import point 28 to the block 34. And the second interactive modulation 4〇 from the block to the block 34, the parent intermodulation becomes 32 and interacts There will be different lengths of transmission paths, and the transmission time of the intermodulation modulation 32 and 4〇 arrival block 34 will be different, and the variable can be excluded by the measurement instrument correction. It is desirable and practical to achieve the intended purpose and effect of use. However, the above embodiment is only 201212563. The present invention is specifically described as a post. This embodiment is not The invention is not limited to the scope of the invention as claimed in the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS The first figure shows a flow chart of an embodiment of the present invention. The second figure shows a chart of signal detection according to an embodiment of the present invention. [Main component symbol description] 10 signal transmission path 12 block 14 first high frequency signal 16 block 18 combiner 20 block 22 first one frequency signal 24 block 26 block 28 import point 30 output end 32 interactive adjustment Variable 34 block 36 block 38 block 40 interactive modulation 42 frequency difference 44 block 46 horizontal axis 48 vertical axis 50 receiving time point 52 starting frequency 54 ending frequency 56 time offset