201105148 六、發明說明： 【發明所屬之技術領域】 觸裝置及音量觸方法，尤其是涉及—種用於 叮攜式電子裝置的音量調節裝置及音量調節方法。 【先前技術】 榮二著行動電話及個人數位助理（P⑽nal digital assistant，PDA) 可明式電子裝置的應用日益廣泛，具有刪或調 式電子裝置絲齡遍，人靖可駐電子裝置驗《求也 加，其中语音通話品質是衡量手機性能的重要指標之一。 在使用可攜式電子裝置的整個騎触巾，由於不_人聽覺靈 敏度存在差異，通財往往_使自己的語音保持在既能確保對方^ 楚地聽到話音，又賊覺舒適的細内。實際上，在使用可攜式電子裝 置進行通話的時候鱗會制財說話聲音過杨聽林楚或者對^ 聲音過大喊_耳的情況’树人舰覺翻之外的聲音將會對人 的聽覺神經造成傷害。 【發明内容】 針對上述問題，有必要提供一種可以自動調節音量的音量調節裝 置 另外’還有必要提供一種上述音量調節裝置使用的音量調節方法。 一種音量調節裝置，其應用於可攜式電子裝置’所述音量調節裝 置包括依次電性連接的一預處理單元、一調節單元及一輸出單元，所 述預處理單元用以接收音頻訊號並感測該音頻訊號的電壓值，所述調 節單元用以依據所述音頻訊號的電壓值將音頻訊號放大或限幅或直接 輸出至所述輪出單元，以將所述音頻訊號的電壓值控制在一設定的範 201105148 圍一:ΐ出ΐ兀用以輸出經所述調節單元處理後的音頻訊號。 、f立哺^痛即方法’其包括以下步驟：接收—音頻訊號；感測所 tlf訊柄值；織所述音輪號，藉姐大雜幅處理將所 述曰頻訊麵;電壓值控制在—預設的範圍内；輸出音頻訊號。 效，技術，所述的音量調節I置可將音頻減的電壓值調 王—預。又的範圍内’從而相應的調整音頻訊號的響度值，達到自動 調節音量的目的。 I【實施方式】 本毛月λ開-種音里調節裝置及方法，其適用於行動電話、PDA、 MP3等可攜式電子裝置。 士在可攜式電子裝置巾，類比音頻訊號的處理過程—般為：聲—電 —聲’其巾聲波階段振幅的大小影響人耳料音強弱的感覺度（即響 度）’其可用電訊號階段的電壓值來對應地表示。由於電壓值與振幅 疋一-對應關係’即可藉由調整其電塵值的大小來調整對應的響度 值。-般來說人耳較容易接受崎音響度值範圍約為 50〜70dB ’根據 φ實驗測得’备聲音響度絲圍約為％〜7〇dB時，其相應的電壓值約 為[5〜50mV]。故本實施例中選擇此範圍作為輸出音頻訊號的響度範 圍，從而保證通話品質並且保護人的聽覺神經不受損傷。 凊參閱圖1，所述音量調節裝置1〇〇包括依次電性連接的一預處 理單元10、一調節單元2〇及一輪出單元4〇。 所述預處理單元1〇包括依次電性連接的一音頻訊號接收模組 12、一第一放大模組14及一電壓感測模組16。所述音頻訊號接收模 組12用於接收音頻訊號’其可為一射頻(Radio Frequency，RF)電路。 所述第一放大模組14用於放大接收到的音頻訊號，在本實施例中，為 201105148 使所述音量調節裝置100能夠更加精確地調節音量’所述第一放大模 組14將所述音頻訊號的電壓值先行放大50倍。所述電壓感測模組16 用於感測經過放大後的音頻訊號的電壓值，並將該電壓值資料傳輸到 所述調節單元20。 所述調節單元20用以調節所述經過放大的音頻訊號的電壓值，即 控制音頻訊號的電壓值在[5〜50mV]*50=[0.25〜2.5V]範圍内。所述調 節單元20包括一選通模組22以及均與所述選通模組22電性連接的一 鲁第二放大模組24及一限幅模組26。 所述選通模組22電性連接於所述電壓感測模組16，並具有選擇 接通作用。所述選通模組22用於判別由所述電壓感測模組16感測出 的電壓值是否在已設定的電壓值區間[0.25〜2.5V]内。所述選通模組 22根據判別分析的結果選擇音頻訊號下一步的輸入路徑，具體地說， 當選通模組22檢測到當前音頻訊號的電壓值小於0.25V時，所述音頻 訊號將藉由所述第二放大模組24 ;當選通模組22檢測到當前音頻訊 號的電壓值大於2.5V時，所述音頻訊號將藉由所述限幅模組26 ;當 φ選通模組22檢測到當前音頻訊號的電壓值在區間[0.25〜2.5V]内時， 所述音頻訊號將被直接傳輸到所述輸出單元40。 所述第二放大模組24可為一同相放大器，為使電壓值小於0.25V 的音頻訊號放大後能夠進入[0.25〜2.5V]的調節範圍内，本實施例中第 二放大模組24放大倍數設置為10倍。所述音頻訊號的電壓值經過所 述放大電路24的放大後，其電壓值落入電壓值區間[0.25〜2.5V]内的 音頻訊號將被傳輸到所述輸出單元40。可以理解，此時將忽略經過10 倍放大而其電壓值未能落入電壓值區間[0.25〜2.5V]内的音頻訊號。 所述限幅模組26用於將電壓值大於2.5V的音頻訊號限制為 201105148 2.5V所述限模經％可為二極體雙向限幅電路。 號將被傳_所赌轉元4〇。 ^域的音頻訊 出單i斤元㈣於輪出直接被通話者收聽的音頻訊號。所述輪 出早兀40包括依次電性連接的一衰減模組42 故輸 頻訊號輸出模紐46。所述衰減模組42 放大^及-音 衰減倍數為5〇件，所硫m π η 放大松組14相對且 22、第-放夫握f 減模組同時電性連接於所述選通難 第-放大模組24及限幅模組26。所述衰 … 述調節單元20處理後的音頻訊號，並將麵_用=收經所 的〜ΓΓ咖。所職級⑽崎_纖模組π 处理後的日頻訊號的雜訊幹擾。所述·模組44可為—通帶大 =〇到35_ζ的帶通滤波器，所述通帶包含適於人耳接受的聲音頻率 l_4G〜34(脑)。所述音舰號㈣· 46胁輸出音頻訊號，將 包含音頻資訊的電訊號轉換成聲波，通f，f知的聽筒即可承擔 訊號輸出模組46的作用。 ^ 請參閱圖2，所述音量調節裝置綱進行音量調節的方法包括以 下步驟： 步驟S1:藉由所述音頻訊號接收模组12接收音頻訊號並將音頻訊 號傳輸給所述第一放大模組14 ; 步驟S2:所述第-放大模組Μ將音頻訊號放大5〇倍，並將該音頻 訊號傳輸給所述電壓檢測模組16 ; 步驟S3:藉由所述電壓感測模組16感測出經放大後的音頻訊號的 電壓值，並把電壓值訊號傳輸到所述調節單元2〇 ; 步驟S4:所述調節單元20接收所述經放大後的音頻訊號，並由調 201105148 節单TO 20中的選通模組22比較該音頻訊號的電壓值是否在預設電壓 值範圍内’當選通模組22判斷當前音頻訊號的電壓值不在預設的電壓 值軏圍時，則執行步驟S5 ;當選通模組22判斷當前音頻訊號的電壓 值在預没的電壓值範圍時，則直接執行步驟$8 ; 步驟S5:所述選通模組22繼續判斷當前音頻訊號的電壓值是否大 於預設的最大電壓值，若當前音頻訊號的電壓值小於預設的最大電屡 值時，則執行步驟S6 ;若當前音頻訊號的電壓值大於預設的最大電壓 鲁值時’則執行步驟S7 ; ”步驟S6:所述調節單元2〇中的第二放大模組24將當前音頻訊號的 電壓值放大10倍，並將第二次放大後的音頻訊號傳輸給所述輸出單元 40 ’再執行步驟S8 ; ^驟S7:所述調節單元20中的限幅模組26將當前電壓值限制在預 設電壓值範_ ’再把紐幅後的音賴賴輸給輸出單元4〇 ; 步驟S8:舰輸料元4〇巾的衰賴組42將經過所侧節單元 20處理後的音頻訊號的電壓值衰減5〇倍，並將衰減後的音頻訊號傳 鲁輸給所述輸出單元40中的濾波模組44 ; 一步驟S9:所述輸出單元40中的遽波模組44遽除經衰減後的音頻訊 號裏的雜訊，並將遽波後的音頻訊號傳輸給所述輸出單元4〇中的音頻 訊號輸出模組46 ; , 步驟S10:所述音頻訊號輸出模組46將渡波後的音頻訊號輸出。 【圖式簡單說明】 圖1係本發明音量調節裝置的較佳實施方式的功能模組圖。 圖2係本發明音量調節方法的較佳實施方式的工作流程圖。 201105148 【主要組件符號說明】 音量調節裝置 100 預處理單元 10 音頻訊號接收模組 12 第一放大模組 14 電壓感測模組 16 調節單元 20 選通模組 22 第二放大模組 24 限幅模組 26 輸出單元 40 衰減模組 42 濾波模組 44 音頻訊號輸出模組 46201105148 VI. Description of the Invention: [Technical Field] The touch device and the volume touch method, in particular, relate to a volume adjustment device and a volume adjustment method for a portable electronic device. [Prior Art] Rongji has a mobile phone and personal digital assistant (PDA). The application of the electronic device is increasingly widespread, with the deletion or adjustment of the electronic device, and the person can be in the electronic device. Plus, voice call quality is one of the important indicators to measure the performance of mobile phones. In the entire riding tent using the portable electronic device, since there is no difference in the human hearing sensitivity, the money is often kept _ so that the voice is kept in the fineness of ensuring that the other party can hear the voice and the thief feels comfortable. . In fact, when using a portable electronic device to make a call, the scales will make money, and the voice will be over Yang Lin, or if the voice is too shouting _ ear situation, the sound of the tree will be different. The auditory nerve causes damage. SUMMARY OF THE INVENTION In view of the above problems, it is necessary to provide a volume adjusting device that can automatically adjust the volume. Further, it is also necessary to provide a volume adjusting method used by the above-described volume adjusting device. A volume adjustment device is applied to a portable electronic device. The volume adjustment device includes a pre-processing unit, an adjustment unit and an output unit, which are electrically connected in sequence, and the pre-processing unit is configured to receive an audio signal and sense Measuring the voltage value of the audio signal, the adjusting unit is configured to amplify or limit or directly output the audio signal to the rounding unit according to the voltage value of the audio signal, to control the voltage value of the audio signal to A set range of 201105148 is used to output an audio signal processed by the adjustment unit. The method includes the following steps: receiving the audio signal; sensing the tlf signal value; weaving the sound wheel number, and processing the frequency signal by the sister's large amplitude; Control is within the preset range; the audio signal is output. Effect, technology, the volume adjustment I set can adjust the voltage value of the audio minus - pre-. In the range of 'and thus correspondingly adjusts the loudness value of the audio signal, the purpose of automatically adjusting the volume is achieved. I [Embodiment] The present invention is applicable to portable electronic devices such as mobile phones, PDAs, and MP3s. In the portable electronic device towel, the analog audio signal processing process is generally: sound-electric-acoustic's amplitude of the sound wave phase of the towel affects the sensitivity of the human ear sound intensity (ie loudness)' its available electrical signal The voltage values of the phases are correspondingly represented. Since the voltage value and the amplitude 疋-correspondence relationship ′, the corresponding loudness value can be adjusted by adjusting the magnitude of the electric dust value. - Generally speaking, the human ear is more likely to accept the range of the acoustic value of about 50~70dB. 'According to the φ experiment, the sound level is about %~7〇dB, and the corresponding voltage value is about [5. ~50mV]. Therefore, in this embodiment, the range is selected as the loudness range of the output audio signal, thereby ensuring the call quality and protecting the human auditory nerve from damage. Referring to FIG. 1, the volume adjusting device 1A includes a pre-processing unit 10, an adjusting unit 2A, and an ejecting unit 4, which are electrically connected in sequence. The pre-processing unit 1 includes an audio signal receiving module 12, a first amplifying module 14 and a voltage sensing module 16 that are electrically connected in sequence. The audio signal receiving module 12 is configured to receive an audio signal, which may be a radio frequency (RF) circuit. The first amplifying module 14 is configured to amplify the received audio signal. In the embodiment, 201105148 enables the volume adjusting device 100 to adjust the volume more accurately. The first amplifying module 14 will The voltage value of the audio signal is amplified by 50 times. The voltage sensing module 16 is configured to sense a voltage value of the amplified audio signal, and transmit the voltage value data to the adjusting unit 20. The adjusting unit 20 is configured to adjust a voltage value of the amplified audio signal, that is, a voltage value of the control audio signal is in a range of [5 to 50 mV]*50=[0.25 to 2.5 V]. The modulating unit 20 includes a strobe module 22 and a second amplifying module 24 and a limiting module 26 that are electrically connected to the strobe module 22. The strobe module 22 is electrically connected to the voltage sensing module 16 and has a selective turn-on function. The strobe module 22 is configured to determine whether the voltage value sensed by the voltage sensing module 16 is within a set voltage value interval [0.25~2.5V]. The strobe module 22 selects an input path of the audio signal according to the result of the discriminant analysis. Specifically, when the strobe module 22 detects that the voltage value of the current audio signal is less than 0.25 V, the audio signal will be used by the strobe module 22 The second amplification module 24; when the gate module 22 detects that the voltage value of the current audio signal is greater than 2.5V, the audio signal will be detected by the limiting module 26; when the φ gate module 22 detects When the voltage value of the current audio signal is within the interval [0.25~2.5V], the audio signal will be directly transmitted to the output unit 40. The second amplifying module 24 can be a non-inverting amplifier, and can enlarge the audio signal with a voltage value less than 0.25V to enter the adjustment range of [0.25~2.5V]. In this embodiment, the second amplifying module 24 amplifies The multiple is set to 10 times. After the voltage value of the audio signal is amplified by the amplifying circuit 24, an audio signal whose voltage value falls within the voltage value interval [0.25 to 2.5 V] is transmitted to the output unit 40. It can be understood that the audio signal that has undergone 10 times amplification and whose voltage value does not fall within the voltage value interval [0.25~2.5V] will be ignored. The limiting module 26 is configured to limit the audio signal with a voltage value greater than 2.5V to 201105148 2.5V, and the limiting mode can be a diode bidirectional limiting circuit. The number will be passed on. The audio signal of the domain is a ringtone (4) for the audio signal that is directly listened to by the caller. The wheeled early 40 includes an attenuation module 42 that is electrically connected in sequence, and thus the frequency signal output module 46. The attenuation module 42 amplifies the sum of the sound attenuation and the sound attenuation factor is 5, and the sulfur m π η magnifies the loose group 14 and the 22, the first-player grip f reduction module is electrically connected to the gating difficulty. The first amplification module 24 and the limiter module 26. The audio signal processed by the modulating unit 20 is used, and the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The noise level of the daily frequency signal after the processing of the level (10) Saki _ fiber module π. The module 44 can be a bandpass filter with a passband large = 〇 to 35_ζ, the passband containing a sound frequency l_4G~34 (brain) suitable for the human ear. The sound ship number (four) · 46 flank outputs an audio signal, and converts the electric signal containing the audio information into sound waves, and the earphones of the f, f, can bear the function of the signal output module 46. Referring to FIG. 2, the method for adjusting the volume of the volume adjustment device includes the following steps: Step S1: receiving an audio signal by the audio signal receiving module 12 and transmitting the audio signal to the first amplification module Step S2: The first amplification module amplifies the audio signal by 5 times and transmits the audio signal to the voltage detection module 16; Step S3: the voltage sensing module 16 senses Detecting the voltage value of the amplified audio signal, and transmitting the voltage value signal to the adjusting unit 2〇; Step S4: the adjusting unit 20 receives the amplified audio signal, and is adjusted by 201105148 The strobe module 22 of the TO 20 compares whether the voltage value of the audio signal is within a preset voltage value range. When the strobe module 22 determines that the voltage value of the current audio signal is not within the preset voltage value, the step is performed. S5; when the strobe module 22 determines that the voltage value of the current audio signal is in the range of the pre-existing voltage value, the step $8 is directly performed; Step S5: the strobe module 22 continues to determine whether the voltage value of the current audio signal is greater than the pre- Most If the voltage value of the current audio signal is less than the preset maximum power value, step S6 is performed; if the voltage value of the current audio signal is greater than the preset maximum voltage value, step S7 is performed; step S6 The second amplification module 24 of the adjustment unit 2〇 amplifies the voltage value of the current audio signal by 10 times, and transmits the second amplified audio signal to the output unit 40′, and then performs step S8; Step S7: the limiting module 26 in the adjusting unit 20 limits the current voltage value to the preset voltage value _ ' and then outputs the tone after the sag to the output unit 4 〇; Step S8: Ship material The fading group 42 of the cymbal 4 attenuates the voltage value of the audio signal processed by the side gang unit 20 by 5 〇, and transmits the attenuated audio signal to the filtering module in the output unit 40. Step S9: The chopping module 44 in the output unit 40 removes the noise in the attenuated audio signal, and transmits the chopped audio signal to the audio in the output unit 4 a signal output module 46;, step S10: the audio signal output module 46 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a functional block diagram of a preferred embodiment of the volume adjusting device of the present invention. Fig. 2 is a flow chart showing the operation of a preferred embodiment of the volume adjusting method of the present invention. 201105148 [Main component symbol description] Volume adjustment device 100 Pre-processing unit 10 Audio signal receiving module 12 First amplification module 14 Voltage sensing module 16 Adjustment unit 20 Gating module 22 Second amplification module 24 Limiting mode Group 26 output unit 40 attenuation module 42 filter module 44 audio signal output module 46