200949261 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種聲學喇队自然頻率測試裝置與方法，特 別是指一種利用函數信號產生器進行聲學喇叭自然頻率之測試 裝置與方法，以超音波產生裝置產生超音波頻率機械振動，利 用感測裝置感測聲學喇队受超音波產生裝置產生之超音波頻率 機械振動激振後本身的自然頻率，傳送至函數信號產生器顯示 ❹出自然頻 率值，以得知該聲學剩队之自然頻率值。 【先前技術】 按，塑膠熔接的利用在近年發展相當的快速，塑膠及複合材 料取代金屬材料作為結構材料已成為趨勢，在機械製造、航太航 空、汽車、電子'日常化工等領域均有由塑膠和複合材料製成的 產品。複雜的熱塑性塑膠零件生產中’將注塑出的多個零件連接 在-起通常是經濟有效的辦法’為此需要選擇多樣的連接方式， © 如黏結、機械炎緊和溶化黏結即炼接。超音波溶接（ultras〇nic Welding)由於熔接過程時間短、生產率高、可保證較高的熔接強 度，所以特別適用於熱塑性塑膠的連接，超音波㈣的效率則仰 賴於聲學制队（Acoustic Horns)的性能。 聲學喇队的功能是將機械振動的振幅放大，或是將能量集中 在較小的截面上進行聚能"刺叭的形式大致可分為錐形 (c〇nical)、階梯形（step)、指數形（Exp〇nentiai)、懸鏈曲面形 (Catenoidal)和其他形式為此四種喇叭之各種組合。 200949261 超音波振動子（Vibrator)所產生的振幅一般為4〜1〇辦，而 進灯超音波加工時所需的振幅大小往往要達到1〇〜1〇〇辦以上 才能進彳了有效加JL，料候就必縣助聲學私將振動子的振幅 放大。聲學之所以能放大振幅，是㈣它通過任—截面的振 動能量不變（忽略能量傳遞損耗），截面小的地方能量密度就越 大，能量密度變大，振幅也就跟著放大。 業界常用經驗近似值去計算聲學喇„八共振長度，此方式往往 © 造成材料的浪費和時間的消耗，設計出來的㈣也許不能與機器 調合，因而降低剩口八的效率；業界或常用試誤法來找尋其最佳的 製程參數，為了得到適當的熔接強度，人們需要進行大量的試 驗，獲得相應的熔接參數，不僅費時費力，而且不能從根本上解 決熔接品質提高的問題，限制了超音波塑膠熔接技術的推廣應 用。 _ 在諸多聲㈣ <設計與職過对，設計賴廠商常以頻譜 分析儀進行聲學喇队之自然頻率值測試，然頻譜分析儀不僅價格 昂貴，在操作使用上亦需相當專業之工程人員方具備完整的專業 能力來進行頻譜分析儀的操作使用，一般中下游廠商與使用者則 難以擁有此類昂貴且複㈣頻譜分析儀，縱使取得頻譜分析儀亦 難以運用自如，如此，不僅使一般中下游廠商與使用者無法實際 對超音波塑膠熔接技術做出品質改善與製程改變，更限制了超音 波塑膠熔接技術的應用。 200949261 除了上述使用頻譜分析儀量測聲學剩》八自然頻率外，亦有_ 種各用里樹方式，係將聲學剩α八自超音波機台拆下，褒置於超音 波振動子上’振動子外接頻率計數器（freq_cy c〇u晰），頻 ;;/再外接曰頻產生器（audio generator)，轉動音頻產生 器的頻率調整知’使其產生高頻率振動，當與頻率計數器連結之 協震電壓表呈現最低值’且聲學伽v工作端面產线振振動時， 此時解計數器顯Μ值極絲學心自然頻率值。這種量測方 法缺點為虛線外量測，不能直接在生產線上進行量測。 本案發明人鑒於上述習用音波聲學味卜八自然頻率測試襄置 與方法的各項缺點，乃亟思加以改良創新，並經多年潛心研究 後’經多㈣驗驗證’終於成功研發並證明本件聲㈣A自然頻 率測試裝置與方法。 【發明内容】 β 纟發明之目的即在於提供-種測試裝置不僅容易於市面上 取得，且價格不高，以降低聲學似自然頻率測試裝置成本。 可達成上述發明目的之-種聲學似自然頻率測試裝置，包 括有： 超音波產生裝置，係為超音波塑膠溶接機，用以產生超音波 頻率機械振動； 感測農置，係為被動式自_率感測探棒，用以感測待測物 (聲料㈤受超音波產生裝置產生之超音波頻率機械振動激振 200949261 後本身的自然頻率’並將該自然頻率訊號傳送至量測褒置； …量測裝置’係為函數信號產生器，用以接收感測裝置傳送之 訊號’顯示出自然頻率值。 可達成上述發明目的之一種聲學料自然頻率測試方法，兑 步驟如下： 〃 將待測物裝設於超音波產生裝置，啟動超音波產生裝置產生 超音波頻率機械振動； ☆將感測裝置置於待測物之量測點，利用感測裝置感測待測物 又超g波產生裝置產生之超音波頻率機械振動激振後本身的自 然頻率，並將該自然'頻率訊號傳送至量測裝置，由該量測裝置顯 示出所測得之自然頻率值。 【實施方式】 請參閱圖-與圖二，本發明所提供之聲學糾自然頻率測試 裝置與方法之詳細實施步驟流程，主要包括有： 超音波產生装置係為超音波塑膠熔接機（1)，用以產生超音 波頻率機械振動； 感測裝置係為被動式自然頻率感測探棒⑷，用以感測待測 物（聲學心八⑵）受超音波產生裝置產生之超音波頻率機械振動 激振後本身的自然頻率，並將該自然頻率訊號傳送至量測裝置； 量測裝置係為函數信號產生器（3)，用以接收感測裝置傳送 之訊號’顯示出自然頻率值。 200949261 請再參閱圖二，本發明使用之超音波產生裝置係為超音波塑 膠溶接機⑴，可將欲測試之聲學似⑵裝設於超音波塑膠溶接 機⑴。 本發明使用之量測裝置係為〇. 〇5Hz〜 5MHz的函數信號產生 器（3)，該函數信號產生器（3)具備多功能及高度穩定性，其特點 除了可以顯示本機產生的波形頻率外亦可兼外測計頻器，輸入電 ㈣圍從30mV〜150V，輸入頻率範圍從〇.服〜_2，具備自動 β換檔⑽〇 ke)、自動閘時（Aut〇咖―）、小數點自動對 位、顯示單位（1|2/_自動換算等功能。顯示5位數最高解析度 達0.001Hz，儀器規格如圖三所示。 感測裝置採用被動式自然頻率感測探棒⑷，可操取聲學剩 八（2)又超日波產生裝置卫作頻率激振後本身的自然頻率值大 多數被動式自然頻率感測探棒⑷的衰減係數都相同，例如Η X 、100Χ等，探棒規格如圖四所示。 ® ※設備參數設定如下： 。將被動式自然頻率感測探棒⑷之訊號接頭（41)接於函數信 號產生11(3)之外部計頻輸人端（31)，接著於儀器面板⑽上設 定量測參數。 ※量測設定包括： L外部計頻輪入（EXT COUNTER INPUT):將被動式自然， 率感測探棒⑷接於此外部計頻輸入端（31)，外部信號 200949261 經此進入計頻器前級放大器，輸入頻率範圍0 2Hz〜 60MHz，並將探棒衰減係數設為ι〇χ。 2·外部計頻高頻輸入（EXTHF):切換到濾波器至此開關避 開低頻諧波’而得到欲量測之高頻信號進入計頻器。 3·頻率範圍鈕（RANGE):共分為四段範圍可供選擇使用； 由左邊順時針起算分別為Χ1、χι〇、χι〇〇、χ1〇〇〇共四 檔，將槽位切換到）Q 〇〇〇，外部所測得之頻率值χ1 〇〇〇 倍即為實際頻率值。 4.外部計頻指示（EXT COUNTER) : LED燈亮指示為外部計頻 狀態。 本發明之一種聲學喇叭自然頻率測試方法，步驟如下： 1 ·將待測物（聲學喇队（2 ))裝設於超音波產生裝置（超音 波塑膠溶接機（1))，啟動超音波產生裝置（超音波塑膝 熔接機（1))產生超音波頻率機械振動。係將函數信號產 生器（4)的量測裝置其參數設定完成後，將量測之被動 式自然頻率感測探棒（4)置於欲測量位置，且被動式自 然頻率感測探棒（4)之感測頭（42)與聲學喇^八（2)量測 點保持約1 mm的距離。 2_將感測裝置（自然頻率感測探棒（4))置於待測物（聲學 剩口八（2))之量測點，利用感測裝置（自然頻率感測探棒 (4 ))感測待測物（聲學喇„八（2 )受超音波產生裝置（超音 200949261 波塑膠熔接機⑴）產生之超音波頻率機械振動激振後 本身的自然頻率，並將該自然頻率訊號傳送至量測裝置 (函數l號產生器⑶），由該量測裝置（函數信號產生器 (3))顯示出所測得之自然頻率值。將欲量測之聲學喇〇八 (2)安裝於超音波塑膠熔接機（1)台上，啟動機台產生音 波激振，激振頻率l5kHz，激振時間約i〜2秒，便可以 Ο 經由被動式自Μ率感測探棒⑷測得外力激振之後聲 子°刺°八⑵的自然頻率值’並顯示於函數信號產生器⑶ 的顯示螢幕（33)上。 欲量測之聲學剩0八⑵選定同一產品系列之三種形式，包括 錐型t八（圖五a所示）、階梯型心八（圖五匕所示）及複合型剩200949261 IX. Description of the Invention: [Technical Field] The present invention relates to an acoustic band natural frequency testing device and method, and more particularly to a device and method for testing an acoustic horn natural frequency using a function signal generator. The sound wave generating device generates ultrasonic vibration of the ultrasonic frequency, and the sensing device senses the natural frequency of the ultrasonic wave generated by the ultrasonic wave generated by the ultrasonic wave generating device, and transmits it to the function signal generator to display the natural frequency. Value to know the natural frequency value of the remaining guitar. [Prior Art] According to the use of plastic welding, it has developed quite rapidly in recent years. Plastics and composite materials have replaced metal materials as structural materials. It has become a trend in machinery manufacturing, aerospace, automotive, electronics, and daily chemical industries. Products made of plastic and composite materials. In the production of complex thermoplastic parts, it is usually a cost-effective way to connect multiple parts that are injection molded. This requires a variety of connections, such as bonding, mechanical compression and melting bonding. Ultrasonic welding (ultrastic welding) is especially suitable for the connection of thermoplastics due to the short welding process time, high productivity and high welding strength. The efficiency of ultrasonic (4) depends on Acoustic Horns. Performance. The function of the acoustic racquet is to amplify the amplitude of the mechanical vibration, or concentrate the energy on a small section to collect energy. The form of the spur can be roughly divided into a cone (c〇nical) and a stepped step. Exp〇nentiai, Catenoidal, and other forms of various combinations of these four types of speakers. 200949261 The amplitude of the ultrasonic vibrator (Vibrator) is generally 4~1, and the amplitude required for the ultrasonic processing of the incoming light often needs to reach 1〇~1. In the meantime, the county will help the acoustics to amplify the amplitude of the vibrator. The reason why the acoustics can amplify the amplitude is that (4) it does not change the vibration energy of the arbitrary-section (ignoring the energy transmission loss), the larger the energy density is, the larger the energy density becomes, and the amplitude is amplified. Approximate values in the industry are used to calculate the acoustic length of the acoustic resonance. This method often results in material waste and time consumption. The designed (4) may not be able to blend with the machine, thus reducing the efficiency of the remaining eight; industry or common trial and error In order to find the best process parameters, in order to get the proper welding strength, people need to carry out a large number of tests and obtain the corresponding welding parameters, which is not only time-consuming and laborious, but also can not fundamentally solve the problem of improved welding quality, and limits the ultrasonic plastic. The promotion and application of welding technology. _ In many sounds (4) <Design and job, the design of the manufacturer often uses the spectrum analyzer to test the natural frequency of the acoustic racquet, but the spectrum analyzer is not only expensive, but also in operation and use. It requires a fairly professional engineering staff to have complete professional capabilities for the operation of the spectrum analyzer. It is difficult for mid-stream and downstream manufacturers and users to have such expensive and complex (4) spectrum analyzers, even if it is difficult to use the spectrum analyzer. So, not only can the general middle and downstream manufacturers and users not be able to In addition to the quality improvement and process changes of ultrasonic plastic welding technology, the application of ultrasonic plastic welding technology is limited. 200949261 In addition to the above-mentioned use of spectrum analyzer to measure the acoustics left eight natural frequencies, there are also In the tree mode, the acoustic remaining α8 is removed from the ultrasonic machine, and the 褒 is placed on the ultrasonic vibrator. The vibrator external frequency counter (freq_cy c〇u clarification), frequency;; / then external 曰 frequency generator ( Audio generator), rotating the frequency generator of the audio generator to know that it produces high-frequency vibration, when the synergistic voltmeter connected to the frequency counter exhibits the lowest value' and the acoustic gamma-operating end face vibrates, the solution counter The apparent value of the wire is the natural frequency value of the heart. The disadvantage of this measurement method is the measurement outside the dotted line, which cannot be directly measured on the production line. The inventor of the present invention has considered the above-mentioned conventional acoustic acoustic taste and natural frequency test device and method. The shortcomings of the company are improved and innovated, and after many years of painstaking research, the 'multiple (four) test verification' finally successfully developed and proved the sound of this piece (4) A natural frequency measurement Apparatus and method. SUMMARY OF THE INVENTION The purpose of the invention is to provide a test apparatus that is not only readily available on the market, but also inexpensive, to reduce the cost of an acoustic-like natural frequency test apparatus. The acoustic-like natural frequency testing device includes: an ultrasonic generating device, which is an ultrasonic plastic welding machine for generating ultrasonic vibration of the ultrasonic frequency; and a sensing self-cultivating device, which is a passive self-rate sensing probe for Sense the object to be tested (sound material (5) is subjected to the ultrasonic frequency generated by the ultrasonic generating device, and the natural frequency of itself is transmitted to the measuring device after the natural frequency of the sound frequency vibration of 200949261; the measuring device is The function signal generator is configured to receive the signal transmitted by the sensing device and display the natural frequency value. A natural frequency test method for the acoustic material can achieve the above object, and the following steps are as follows: 〃 The object to be tested is installed in the ultrasonic wave generation The device activates the ultrasonic generating device to generate ultrasonic vibration of the ultrasonic frequency; ☆ placing the sensing device at the measuring point of the object to be tested, and utilizing The sensing device senses the natural frequency of the ultrasonic wave generated by the ultrasonic wave generated by the ultrasonic wave generated by the ultrasonic wave generating device, and transmits the natural frequency signal to the measuring device, and the measuring device displays the ground. The measured natural frequency value. [Embodiment] Please refer to FIG. 2 and FIG. 2, the detailed implementation steps of the acoustic correction natural frequency testing device and method provided by the present invention mainly include: The ultrasonic generating device is an ultrasonic plastic welding machine (1), Used to generate ultrasonic vibration of the ultrasonic frequency; the sensing device is a passive natural frequency sensing probe (4) for sensing the ultrasonic vibration generated by the ultrasonic wave generated by the ultrasonic generating device (acoustic heart eight (2)) The natural frequency of the post itself is transmitted to the measuring device; the measuring device is a function signal generator (3) for receiving the signal transmitted by the sensing device to display the natural frequency value. 200949261 Please refer to Fig. 2 again. The ultrasonic generating device used in the present invention is an ultrasonic plastic melting machine (1), and the acoustical (2) to be tested can be installed in an ultrasonic plastic melting machine (1). The measuring device used in the present invention is a function signal generator (3) of 〇 5 Hz to 5 MHz, and the function signal generator (3) has multi-function and high stability, and its characteristics are not only to display the waveform generated by the machine. The frequency can also be externally measured, the input power (four) is from 30mV to 150V, the input frequency range is from 〇.服~_2, with automatic β shift (10)〇ke), automatic brake (Aut〇-), The decimal point is automatically aligned and displayed in units (1|2/_ auto-scaling, etc. The maximum resolution of 5 digits is 0.001 Hz, and the instrument specifications are shown in Figure 3. The sensing device uses a passive natural frequency sensing probe (4) The natural frequency value of the passive natural frequency sensing probe (4) is the same, for example, Η X , 100 Χ, etc., after the vibration of the remaining eight (2) and super-wave generating devices. The probe specifications are shown in Figure 4. ® ※ The equipment parameters are set as follows: Connect the signal connector (41) of the passive natural frequency sensing probe (4) to the external frequency input terminal of the function signal generation 11 (3) (31) ), then set the measurement on the instrument panel (10) The measurement settings include: L EXT COUNTER INPUT: Passive natural, rate sensing probe (4) is connected to the external frequency input (31), external signal 200949261 enters the frequency Preamplifier, input frequency range 0 2Hz~ 60MHz, and set the probe attenuation coefficient to ι〇χ 2. External frequency high frequency input (EXTHF): switch to filter to switch to avoid low frequency harmonics' Get the high frequency signal to be measured into the frequency counter. 3. Frequency range button (RANGE): It can be divided into four sections to choose from; from the left clockwise to Χ1, χι〇, χι〇〇, χ1 〇〇〇A total of four files, the slot is switched to) Q 〇〇〇, the external measured frequency value χ 1 〇〇〇 is the actual frequency value. 4. External frequency indication (EXT COUNTER): The LED light is on for the external frequency calculation status. The method for testing the natural frequency of the acoustic horn of the invention is as follows: 1) The object to be tested (acoustic racquet (2)) is installed in the ultrasonic generating device (ultrasonic plastic welding machine (1)) to start ultrasonic generation The device (ultrasonic knee welding machine (1)) produces ultrasonic vibrations of the frequency. After the parameter setting device of the function signal generator (4) is set, the passive natural frequency sensing probe (4) is placed at the position to be measured, and the passive natural frequency sensing probe (4) is placed. The sensing head (42) maintains a distance of about 1 mm from the acoustic measuring point (2). 2_ Place the sensing device (natural frequency sensing probe (4)) at the measuring point of the object to be tested (acoustic residual port (8)), using the sensing device (natural frequency sensing probe (4) Sensing the natural frequency of the object to be tested (acoustic „ 八 (2) by the ultrasonic generating device (supersonic 200949261 wave plastic welding machine (1)) after the ultrasonic vibration of the ultrasonic vibration, and the natural frequency signal It is sent to the measuring device (function generator No. (3)), and the measured natural frequency value is displayed by the measuring device (function signal generator (3)). The acoustic Lama (2) to be measured is measured. Installed on the ultrasonic plastic welding machine (1), the starting machine generates sound wave excitation, the excitation frequency is l5kHz, and the excitation time is about i~2 seconds, which can be measured by the passive self-twisting sensing probe (4). After the external force is excited, the phonon is punctured by the natural frequency value of eight (2) and displayed on the display screen (33) of the function signal generator (3). The remaining acoustics of the function product (0) are selected in three forms of the same product series, including Cone type t eight (shown in Figure 5a), stepped heart eight (shown in Figure 5) and composite type
(圖五c所不），凊參閱圖六，量測點的選定是將聲學剩口八⑵ 二縱向長度平均取4個量測點，每—個量測點重複量測五次， 平均這五次所得的值即為單—量測點的頻率值，最後平均聲學 味卜八（2)的四個單—量測點所得之值，即代表聲學輕⑵整體 之自然頻率值。 。月參閱圖七’將使用本發明之裝置與方法所得之聲學制口八 ⑵自然頻率值與商㈣％製造廠商所測得的自錢率值做比 較，由廢商的量别值與本實驗的量測值誤差都在1 %以下來看， 也實了本發月利用市售的函數信號產生器⑶當作量測裝置來 使用，可以做到相當準確的量測。 200949261 /發明所提供之—種聲學·自然頻率測試裝置與方法， 與别述習用技術相互比較時，更具有下列之優點： 1. 測試裝置中各項設備皆容易於業界或市面上取得，且操 作使用方式簡便，十分有益於料或使用者普及使用。 2. 測試裝置中各項設備不僅易於市面上取得，且價格不 高’可降低測試裝置設備成本。 3. 測試裝置可以直接在生產作業線上量測，不用將聲學剩 0八（2)拆下量測，使測試操作簡便。 4. 運用本發明之聲學喇„八（2)自然頻率測試裝置與方法， 所測試得到之數據具有足夠之精準度，使測試者不僅便 於測試，更可得到精確之測試數值。 上列詳細說明係針對本發明之一可行實施例之具體說明， 惟該實施例並非用以限制本發明之專利範圍，凡未脫離本發明 技藝精神所為之等效實施或變更，均應包含於本案之專利範圍 中。 綜上所述，本案不但在技術型態上確屬創新，並能較習用 物品及技術增進多項功效，應已充分符合新穎性及進步性之法 定新型專利要件’爰依法提出中請，懇請貴局核准本件發明 專利申請案，以勵發明，至感德便。 【圖式簡單說明】 圖一為本發明一種聲學喇„八自然頻率測試裝置與方法之實 12 200949261 施步驟流程圖。 圖二為本發明之聲學喇队自然頻率測試裝置示意圖。 圖三為本發明之函數信號產生器規格表。 圖四為本發明之被動式自然頻率感測探棒規格表。 圖五a為本發明之測試用錐形喇σ八示意圖。 圖五b為本發明之測試用階梯型喇 示意圖。(Figure 5c does not), 凊 Refer to Figure 6. The measurement point is selected by taking the average length of the acoustic remaining eight (2) two longitudinal measurement points, and measuring the measurement points five times for each measurement point. The value obtained five times is the frequency value of the single-measurement point, and the value obtained by the four single-measurement points of the average acoustic taste of eight (2) represents the natural frequency value of the acoustic light (2). . Referring to Figure VII, the acoustic interface produced by the apparatus and method of the present invention will be compared with the value of the self-purchasing rate measured by the manufacturer (4)%, and the value of the waste quotient and the experiment. The measured value error is less than 1%. It is also used in the month of the month to use the commercially available function signal generator (3) as a measuring device, which can make a fairly accurate measurement. 200949261 / The invention provides an acoustic and natural frequency test device and method, which have the following advantages when compared with other conventional technologies: 1. Each device in the test device is easily obtained in the industry or the market, and It is easy to use and is very beneficial to the materials or users. 2. The equipment in the test device is not only easy to obtain on the market, but also inexpensive, which can reduce the cost of the test equipment. 3. The test device can be directly measured on the production line without removing the remaining 0 (2) of the acoustics, making the test operation easy. 4. Using the acoustic à eight (2) natural frequency test device and method of the present invention, the data obtained by the test has sufficient accuracy, so that the tester can not only facilitate the test, but also obtain accurate test values. The detailed description of the possible embodiments of the present invention is not intended to limit the scope of the invention, and the equivalents and modifications of the present invention should be included in the scope of the patent. In summary, this case is not only innovative in terms of technical type, but also can enhance many functions compared with the use of articles and technology. It should be fully in line with the novelty and progressive statutory new patent requirements. I would like to ask you to approve the invention patent application, in order to invent the invention, to the sense of convenience. [Simplified illustration of the drawings] Figure 1 is a flow chart of the steps of the acoustic device. FIG. 2 is a schematic diagram of the natural frequency testing device of the acoustic racquet of the present invention. Figure 3 is a specification of a function signal generator of the present invention. Figure 4 is a specification diagram of a passive natural frequency sensing probe of the present invention. Figure 5a is a schematic view of a tapered sigma of the test of the present invention. Figure 5b is a schematic view of the stepped type la for testing of the present invention.
圖五c為本發明之測試用復合型喇π八示意圖。 圖六為本發明之喇β八量測點示意圖。 圖七為本發明之廠商量測及使用本發明之裝置與方法所^ 之聲學喇队自然頻率值比較表。 【主要元件符號說明】 1超音波塑膠熔接機 2聲學喇0八 3函數信號產生器 31外部計頻輸入端 32儀器面板 33顯示螢幕 4自然頻率感測探棒 41訊號接頭 42感測頭 13Figure 5c is a schematic diagram of a composite type of π8 for testing according to the present invention. Fig. 6 is a schematic diagram of a measuring point of a beta beta of the present invention. Figure 7 is a comparison table of the natural frequency values of the acoustic racquets measured by the manufacturer of the present invention and using the apparatus and method of the present invention. [Main component symbol description] 1 Ultrasonic plastic welding machine 2 Acoustic la 0 8 3 function signal generator 31 External frequency input 32 Instrument panel 33 Display screen 4 Natural frequency sensing probe 41 Signal connector 42 Sensor head 13