518837 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（） 本發明係有關於一種雙向無線電對講機防竊聽之方 法，主要係提供群組使用對講機通訊時，可利用頻道（或 配合識別密碼）及換頻時，序等變化所產生之頻道模組，以 避免群組間之通訊內容被竊聽或干擾。 世界各國對無線電之使用已十分普及，不論在救災、 工程、軍事、休閒等皆有其一席之地，然由於法令開放之 頻道有限且爲公用的，再加上無線電信號之傳送均採類比 式，故容易被竊聽；再者，無線電對講機除在發話時爲發 射模式外，其餘時間皆爲接收模式，也容易收到他人信號， 形成無謂的干擾，雖然有心人士曾利用在發射信號前頭， 先行載入人聲頻域以外的波頻，作爲辨識碼，而接收機只 有在波頻符合的情況下，才去開啓喇叭系統，把聲音播放 出來，此方法雖可避免他人通話的干擾，但無法預防遭竊 聽，只要有人使用與你相同之頻道，相同之辨識碼或相同 頻道不管辨識碼一律接聽時，仍可被他人任意竊聽。 發明人有鑑於上述缺失，乃極積硏究改良，始有本發 明之創作，本創作主要係利用對時同步換頻（換碼）之防 竊聽方法，尤其當竊聽者即使用同款之機型，並且使用相 同之換頻順序，而能順利竊聽之機會亦很小（因爲時間準 位不同）。 本發明之主要目的，係在於提供一種雙向無線電對講 機防竊聽之方法，以避免同一區域之無線電對講機使用 者，發生相互干擾的現象，更可徹底解決被竊聽等問題， 使有限的通訊頻道更爲理想之使用者。 3 本紙張又度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁)518837 Printed by the Consumer Standards Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention () The invention relates to a method for preventing eavesdropping on two-way radios. It mainly provides the use of channels (or cooperate with Passwords) and channel modules generated by frequency and sequence changes to prevent eavesdropping or interference in communication between groups. The use of radio has been very popular in various countries around the world. It has its place in disaster relief, engineering, military, leisure, etc. However, due to the limited and public channels of laws and regulations, plus the analogy of radio signal transmission, It is easy to eavesdrop; in addition, the radio intercom is in the receiving mode when it is speaking, the rest of the time is in the receiving mode, and it is easy to receive signals from other people, causing unnecessary interference. Wave frequencies outside the human voice frequency domain are used as identification codes, and the receiver only turns on the speaker system to play the sound if the wave frequencies match. Although this method can avoid interference from other people's calls, it cannot prevent eavesdropping. , As long as someone uses the same channel, the same ID or the same channel regardless of the ID, they can still be tapped by others. In view of the above-mentioned shortcomings, the inventor has made great efforts to improve and began to create the invention of this invention. This creation is mainly an anti-eavesdropping method that uses time-synchronized frequency conversion (escape), especially when the eavesdroppers use the same machine Type, and use the same frequency shift sequence, and the chance of smooth tapping is also small (because of different time levels). The main purpose of the present invention is to provide a method for preventing eavesdropping on two-way radios, to avoid mutual interference between radio users in the same area, and to completely solve problems such as eavesdropping, so as to make limited communication channels more efficient. Ideal user. 3 This paper is again applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling this page)
518837 A7 __—_B7______ 五、發明説明（） 首先請參閱第一圖所示，本發明是在對講機上設有一 誤差度極小之計時器，並預設有一組或一組以上之換頻模 組（1)，而該換頻模組係由若干序列（11)、（12)、（13)所組 成，包含有一頻道（CHl....CHn)、一音頻密碼（PWl...PWn) 及一換頻時序（ΤΙ...Τη)，其中： 頻道（CHl“.CHn)，係主管單位依法開放之指定頻率 區段內可用之通訊頻率數； 音頻密碼（PW1...PWH)，係一組發射信號內，於低（或 高）於人聲頻率之中，加一特定信號以供接收端之無線對 講機判別是否要開啓喇叭系統； 換頻時序（Π)，係每一序列（11)、（12)...之週期設定， 可設爲十秒、五秒等任意變化； 因此每一種換頻模組（1)中含有不同的頻道（CHl..CHn) 順序、辦識密碼（PWl..PWn)及換頻時序（Τ1...ΤΠ)交錯排列 並預先由廠商（或可由使用者）設定而成。 請參閱第二圖所示，藉由換頻模組（1)之變化，吾人 欲使用無線對講機時，可以下列順序完成設定與使用： 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 1 · 先利用無線對講機上之人工介面（如按鈕等）調設 好使用之換頻模組（1)，使欲通話之各無線對講機（即 同一群組所用對講機），全部統一設定成某一換頻模 組（1)，並以其中一部無線電對講機爲主機，先以人 工介面控制發出一準位信號給各副機，而副機收到信 號後會再回覆一信號，且各無線電對講機即開始計 時，並於設定時間（週期S)內（例如一分鐘）由一 4 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 518837 Α7 Β7 五、發明説明（） 方再發出一時間校準脈波（2)作爲時間校準之用’以 確保不會產生時間誤差’若時間校準脈波（2)發射時 間適逢雙方正在通話時便略過不發射；通常時間校準 之發射時段均設在序列（11)、（12)、（13)…中某一段 之中央時段（如圖第三圖所示）’以避免因時間偏移 (或向前或向後）造成時間校準脈波（2)無法順利接 收，而造成雙方都無法連絡。 2 · 當雙方都啓動計時後，其計時器不斷的進行計時。 3 · 計時時間到達預定之換頻時序（T1..TH)時（該時間 係由廠商配合換頻順序變化設定），其頻道 (CH1…CHn)、音頻密碼（PWLPWn)及次一換頻時序 (Τί...Τϋ)都會自動變換（由廠商於出廠時預先設定）。 4 · 不斷的重覆步驟3，直到關機或重設換頻模組（1) 爲止。 綜上所述，本發明可利用預設之換頻模組，以提供無 線電對講機使用者自行設定，俾以避免不必要的干擾或被 竊聽。 經濟部中央標準局員工消費合作社印製 (请先閱讀背面之注意事項再填寫本頁) <重要圖號說明> 換頻模組（1)、序列（11)、（12)、（13)所組成 一頻道（CHl".CHn)、一音頻密碼（PWl._.PWn) 一換頻時序（Τ1..·Τη)、時間校準脈波（2) <圖示說明> 第一圖，係本發明之變換序列示意圖。 第二圖，係本發明作動流程圖。 本紙張尺度適用中國國家標準（CNS ) Α4規格（21〇Χ297公釐） 518837 A7 B7 五、發明説明（ 第三圖，係本發明時間脈波作動示意圖 (請先閲讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐）518837 A7 __—_ B7______ 5. Description of the invention () First, please refer to the first figure, the present invention is provided with a timer with a very small degree of error on the two-way radio, and preset one or more frequency conversion modules ( 1), and the frequency conversion module is composed of several sequences (11), (12), (13), including a channel (CHl .... CHn), an audio password (PWl ... PWn) and A frequency conversion sequence (Ti ... Tn), in which: the channel (CHl ".CHn) is the number of communication frequencies available in the designated frequency section opened by the competent unit according to law; the audio password (PW1 ... PWH) is Within a group of transmitted signals, a specific signal is added to the low (or high) frequency of the human voice for the receiving radio to determine whether the speaker system is to be turned on; the frequency change sequence (Π) is each sequence (11) The period settings of (12) ... can be set to ten seconds, five seconds, etc .; therefore, each frequency conversion module (1) contains different channels (CHl..CHn) sequence, identification password ( PWl..PWn) and frequency shift timing (T1 ... TΠ) are staggered and set in advance by the manufacturer (or by the user). Refer to the second figure. With the change of the frequency conversion module (1), when we want to use the wireless interphone, we can complete the setting and use in the following order: Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the back Please fill in this page before taking note) 1 · First use the manual interface (such as buttons) on the wireless intercom to set up the frequency conversion module (1), so that each wireless intercom you want to talk to (ie the intercom used in the same group) , All set to a certain frequency conversion module (1), and one of the radios is used as the main unit, and a level signal is sent to each sub-unit through the manual interface control, and the sub-unit will reply after receiving the signal A signal, and each radio intercom starts to count, and within a set time (period S) (for example, one minute) from 4 paper standards to China National Standards (CNS) A4 specifications (210X297 mm) 518837 Α7 Β7 5 2. Description of the invention () Fang sends a time calibration pulse (2) for time calibration 'to ensure no time error' Skip and not transmit during a call; usually the time period of the time calibration is set in the central period of one of the sequences (11), (12), (13) ... (as shown in the third figure) to avoid The time offset (either forward or backward) causes the time calibration pulse (2) to not be received smoothly, and the two parties cannot contact each other. 2 · When both parties start timing, their timers keep counting. 3 · Timing time When the predetermined frequency conversion timing (T1..TH) is reached (the time is set by the manufacturer in accordance with the frequency conversion sequence change), its channel (CH1 ... CHn), audio password (PWLPWn) and the next frequency conversion timing (Τί .. .Τϋ) will be automatically changed (pre-set by the manufacturer at the factory). 4 · Repeat step 3 continuously until the power is turned off or the frequency conversion module (1) is reset. To sum up, the present invention can utilize a preset frequency conversion module to provide radio radio users with their own settings to avoid unnecessary interference or eavesdropping. Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling out this page) < Important Drawing Numbers > Frequency Conversion Module (1), Sequence (11), (12), (13 ) Composed of a channel (CHl " .CHn), an audio password (PWl ._. PWn), a frequency shift timing (T1 .. · Tη), a time calibration pulse (2) < illustration > first Figure is a schematic diagram of a transformation sequence of the present invention. The second figure is a flow chart of the operation of the present invention. This paper size applies the Chinese National Standard (CNS) A4 specification (21 × 297 mm) 518837 A7 B7 V. Description of the invention (The third figure is a schematic diagram of the time pulse of the invention (please read the precautions on the back before filling in this Page) Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs This paper is sized to the Chinese National Standard (CNS) A4 (210 X 297 mm)