TWI220339B - Method of generating an alert for walkie talkie - Google Patents

Abstract

Method of generating a warning signal for a walkie talkie includes: providing a detector and a timer; using the timer to count time; using the detector to determine whether the strength of a wireless signal which includes a standard CTCSS tone received by the walkie talkie is larger than a predetermined value; using the detector to determine whether the strength of a wireless signal which includes a non-standard CTCSS tone received by the walkie talkie is larger than the predetermined value; if so, resetting the timer; and issuing a warning signal when the time counted by timer reaches a predetermined time.

Description

1220339 V. Description of the invention (1) The ancient technical version of the technical field to which the invention belongs: 2—Two kinds of warning signals generated on a radio intercom > Two or one of the warning signals generated when a radio intercom wants to leave the receiving range method. Prior art radio walkie-talkies (walkie — talkie) use a continuous audio coding silence system (CTCSS) to achieve the function of multi-party communication (grown communication), and the main advantages of radio walkie-talkies It can directly point-to-point without any basic facilities. As long as both parties tune to the same frequency, they can transmit or receive information at any time. In the field of helmet-line communication, the continuous audio coding mute system uses a low-frequency audio signal (CTCSS tone) to distinguish it from a signal transmitted on a communication channel, so that a communication area can use $ to make calls. . Please refer to Fig. 1. Fig. 1 is a schematic diagram of the frequency range used in the conventional Yuanli encoding mute system. As shown in Figure 1: The frequency range between “Frequency 62 · 5Hz and 250Hz is used to transmit audio signals”, and the frequency between 300Hz and 3 · “Ha”; $, f to transmit a user's voice signal (Speech si gnan's principle is briefly described as follows. For a conventional radio, the operation uses 14 communication channels (channe 1) p: ·· P gray i 隹 / 使 系 使 1 ·· h 豕 进仃 Signal transmission and 1220339 V. Description of the invention (2) Receiving, the 14 communication channels are physical channels. In addition, each communication channel can be based on audio signals Tf ...... T 3 of 38 different frequencies.涞 Generate a total of 532 (1 4 * 38) logical channels (when a caller sets the physical channel used by the radio to PP and the audio signal used is τ 1, that is, the caller sets its The logical channel is P 1 (T 1) 'When the remote caller presses the radio button (Push-to-talk, ρττ) of the radio, the caller can output his voice signal to the physical channel ρ to The predetermined communication range corresponding to the radio In the case, if there are three other users in the predetermined communication range, and the logical channels used by them are set to P〆Τ!), PJ T38), and P2 (T), for the first user, Because its radio intercom is on the physical channel ρ for signal transmission and reception, the radio intercom of the first user starts to receive the voice signal output by the caller, and the radio interphone judges that the audio signal used by the caller is also Set the same logical channel ρ 1 (T 1) for both the caller and the first user, so the radio of the first user will receive the voice signal of the caller Through a speaker output, the first user can hear the voice signal of the caller. For the second user, 'because his radio is connected to the physical channel, and the signal is transmitted and received', the second user The user ’s radio walkie-talkie will also begin to receive the voice signal output by the caller, but the radio walkie-talkie judges that the audio signal used by the caller is i instead of τ 38, i.e., the caller and the user to the first two different logical channels are set p! (τ 1) and P 1 (τ 38

Page 6 1220339 V. Description of the invention (3)) 'Therefore, the second person uses the voice signal of the caller to the caller's voice signal via ..., j The radio will not affect the receiving user because of its benefits. :: Audio signal 'is used for the transmission and reception of the third-digit messenger. Therefore, the third-channel channel p 粦, the caller uses a different communication :: == two-way radio and the = line, the machine cannot receive two degrees according to one = == Degree nvrrfi 3ic 20r 'rssi) The detected signal is strong ^ Start receiving ^ ^ The signal sent by the sender, so the third messenger's radio pair 4 will not receive the voice of the caller Signal, ^ will not output the voice signal of the caller through a speaker, so the = one or two users cannot hear the voice signal of the caller, that is, the radio of the first and second users The walkie-talkie activates the squelch function by judging the audio signal. In other words, the users who set the same logical channel can talk to each other to achieve the purpose of the group call. Please refer to FIG. 2. FIG. 2 is a functional block diagram of a conventional radio walkie-talkie 10. Radio walkie-talkie 10 includes an antenna

11, a transceiver 12, a selector 1, 4, a processor 16, a voice signal processing unit 20, a speaker 17 ', and a microphone 18. The radio walkie-talkie 10 can receive and transmit radio frequency signals RF via the antenna 11. For the reception of the radio frequency signal M, the transceiver 12 RF the high frequency radio frequency signal RF

Page 7 1220339 V. Description of the invention (4) The baseband signal RX converted to a low frequency is transmitted to the selector 14 and the selector 14 outputs the baseband signal rx through the output A, and the processor 16 The frequency of the audio signal is determined according to the baseband signal Rx. Generally speaking, the processor 16 includes an analog low-pass filter circuit (10w pass fi iter) for filtering. The baseband signal Rx is between the frequency 6 2 · The signal between 5 H z and frequency 2 50 H z, and determine the audio signal corresponding to the fundamental frequency signal to determine whether to use the same logical channel. If the logical channel corresponding to the fundamental frequency signal Rx * is the same as that of the radio intercom 1. The set logical channels are the same, then the processor 16 will activate the speaker 17 for subsequent signal output processing. The voice signal processing unit 20 also includes two analog filter circuits for capturing low-pass filtering at a frequency of 30 Hz. The signal between the high-pass filter with the frequency of 3.4KHz is finally output through the system. Conversely, if the logical channel corresponding to the baseband signal Rx is different from the logical channel set by the radio intercom 丨 〇, the processor 16 will not start the voice signal processing unit 2 0 and the speaker 丨 7, so the radio intercom! 〇 will not output any signals transmitted through different logical channels. For the transmission of radio frequency signal evaluation, when a user has the call key, the selector 14 will select the input terminal B, and the processor $ i ί, f " kefeng 18, so the user's voice signal can be input I t number processing unit 20, as mentioned earlier, the voice signal processing unit j uses an eight filter circuit to capture L ^ between frequency 300 Hz and frequency 3.4 KHz and then output it to processor 16, The processor 16 will add the corresponding audio signal to the output signal of the i 5 and u 5 20 according to the established logical channel of the radio, and then generate the fundamental frequency signal Tx. Finally, the X 1 12 will be converted into a high frequency signal. RF signal is transmitted via antenna

1220339 V. Description of Invention (5). Generally speaking, radio signals are susceptible to various obstacles and various particles in the air, such as water vapor and dust. Even trees, dense leaves and buildings can limit the use of radios. For users, although general radio walkie-talkies will have recommended communication ranges, these ranges are only an estimate. When they are in different environments, they will actually have different ideal communication ranges. You will not know the ideal call range between each other, so you will unknowingly cause a serious impact on the quality of the call because of these adverse terrain or environmental factors. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for generating a warning signal when a radio intercom wants to leave the receiving range, so as to solve the above-mentioned problems. The patent application scope of the present invention provides a method for generating a warning signal on a radio intercom, which includes providing a detection circuit and a timer in the radio intercom; using the timer to count; when the radio intercom receives a standard mute After the radio signal of the audio signal, use the detection circuit to detect whether the signal strength of the radio signal is greater than a predetermined value; when the radio walkie-talkie receives

1220339 V. Invention of ____ audio and video signals, wire signal wr use the detection circuit to detect that it is benefited from the timing ij is greater than the predetermined value 'then reset the timer ...; Signal. In the case of fen, use this ^, Ming another application for a patent; the method of generating a radio signal, 1 packet of "wireless intercom" timer eyepiece · Λ A 4 4 ^ 3 edges for a timer; use At the fixed time, # the radio signal with the time recorded in the 1 tense = i tense reaches a pre-audio signal. The output includes a non-standard mute implementation. Green + Phase See also Figure 3, Figure 4, and Figure 5, Figure 3. It is a schematic diagram of the appearance of the beneficial radio walkie-talkie 30, 40 of the present invention, and FIG. 4 is a functional diagram of the present invention | wireless walkie-talkie 30 ′ 40, and FIG. 5 is a timing diagram of the transmission signal of the present invention. The radio walkie-talkie 30 includes a call button 3 2. A microphone 3 4, a timer 3 5, a processor 36, and a radio transmitter 38. The radio walkie-talkie 40 includes a receiving circuit 42, a system sigma 44, a detection circuit 45, a The processor 46 and a timer 48. When the call key 3 2 is touched, that is, the time period of the t thorn private and t brake in FIG. 5, the processor 36 will control the microphone 3 4 to start receiving the voice signal and follow User pre-set frequency 'generates a standard muted audio signal Finally, through no

Page 10 1220339 V. Description of the invention (7) The electric wire transmitter 38 sends the standard mute audio signal and the voice signal together with a preset carrier wave. For example, as shown in Figure 1, since the frequency of general voice signals is between 300 Hz and 3400 Hz, and the frequency of standard mute audio signals is between 62.5 Hz and 250 Hz, there are 38 Audio signals of different frequencies will be distributed between 62.5 Hz and 250 Hz. If a user sets the logical channel of his radio to P〆T38, that is, the carrier of the physical channel P is used, and the 38th standard mute The audio signal (whose frequency is set to 2 50 Η ζ) is transmitted together with the voice signal. However, in addition to the above-mentioned standard mute audio signal, the radio intercom 30 of the present invention starts to count the timer 35 after each release of the call button 3 2 until a preset time T or the call button 3 is detected again When 2 is pressed, the timer 3 5 is reset. Each time the processor 3 6 reaches the preset > time T, the processor 36 outputs a non-standard mute audio signal for a period of time Δt with the carrier, and its purpose will be described in detail later. Please note that the frequency of the radio signal of the non-standard mute audio signal is between 6 2. 5 Hz to 250 Hz, but does not include the defined frequency of the standard mute audio signal. Because the standard mute audio signal and the non-standard mute audio signal Both belong to the same frequency domain. In order to avoid misjudgment, when the standard mute audio signal is sent during the design, non-standard mute audio signals will not be sent. For the convenience of the following description, it is assumed that the radio frequency of the non-standard mute audio signal has been defined by radios 30 and 40 as 65Hz, and the frequency of 65Hz does not belong to any standard mute audio signal. Radio receiver 4 2 radio receiver 4 2 is used to receive wireless

1220339 V. Description of the invention (8)% of beneficial green thunder transmitted from the electric ditch machine 30 »^ The receiver 42 is set ί: line ^ tiger, in the embodiment, the radio circuit 45 is used to reach; it can only receive Carrier to physical channel P. Detect whether the non-standard mute sounds include the voice in the signal; m: ... 6 is used to filter out the radio waves and output the signal; convert the voice signal into a sound timer 4 8 When the A-line mine is addicted to the ground ^ n ", the time is counted in Figure 5. When the line pair 4 and 40 are turned on (also # t.), The figure will start. Step 100 Step 102 Step 1 0 4 Signal Step 106 = f Ξ ',' picture ', for the operation of the radio walkie-talkie 40 to produce shoes t electric walkie-talkie 4. The operation ... down thin; two °; operation ^ timer 48 timing electric receiver 42 receives radio signals; The test circuit 45 receives the radio step 108 from the radio receiver 42; and executes step 110, if not, executes step 1 0 8: the detection circuit 4 5 determines the cockroach helmet 硷 + quasi-mute Audio signal, YES] Does the second Wuxing \ Telecommunication No. 2 product include non-standard step 102; then executes step 110; if not, executes to determine whether the signal strength of the non-halfline signal is greater than a predetermined threshold. ". / 1. If no, go to Step 102; Step 112 · Reset (reset) timer 48 ;, Description of invention (9) Wireless The radio walkie-talkie 40 is connected to aw. (Step 100). Next, after Yixian Lei \, Timing 48 began to time the telecom identification helmet ", and Yixian received by Wide Receiver 42 was bluffed to have the use of physical channels p: 'Sigh. ,,, The radio signals of the deep physical channel carrier are two and two benefits: wire and telecommunication signals, and the non-test circuit 45 cannot receive radio signals when receiving radio signals. Later, the detection county does not —…, and later, will compare and then mine. Does the standard include the frequency of 250 Hz Bi Deli \ _ * Electric flood, if the right & 丨 master .. ^ Jing Yue frequency signal (step 10 6 start, t V means the radio intercom 30 The key 32 is being turned on, and the detection circuit 45 will judge at this time: fish ^ ^ power on? 4: 2: a pre-== (step " 〇), if not, it means that the wireless ratio is off. Detect circuit 2 whether the signal contains a non-standard mute at 65Ηζ frequency (step 108). If a 65Ηζ frequency is available, it means that = 1 is received. A non-standard mute from radio intercom 3 Audio signal: The detection circuit confirms that the radio signal contains a standard silent audio signal (250H z) or the non-standard quasi-muted audio signal (65112), it will be judged whether the signal strength of the f standard muted audio signal or the non-standard muted audio signal is greater than the preset value (step 11 〇), if it is, it means the radio The receiving strength of the signal is strong enough, and the radio 2 can still clearly receive the signal of the radio 3 30. At this time, the timer 4 8 will be reset (step 110). If not, it means that the radio signal strength is approaching The threshold of unreceivable, which means that the radio 2 may soon be unable to receive the signal from the radio 30. Please note that the preset value is greater than the radio 2 can receive radios in the predetermined frequency range.

Page 13 1220339 V. Description of invention (ίο) | The receiving strength of the signal | The value can still be used by the receiving user | Timer 48 arrives at a predetermined time without a reason—the warning signal to the radio | value ' It should be as soon as possible after the sudden communication in the wireless signal, after the I number, the minimum value of the intercom 40, the minimum time to reset the wireless radio, the remaining σ 8 4 4 ends between 30 When the call is interrupted or the two-way radio repeats the value, that is, when the two-way radio is turned on between the times, such as 2T, prompting the use of receivable or poor quality of each other will reset the process. When the signal When the wireless 30 transmits, it will start as a timing radio and its no signal strong call distance problem timer until the intensity of the beginning of the intercom talk timer 4 8 intercom line electrical connection is about to shorten. Waiting to send 4 8 and the user's note about the preset machine 4 0. Because "if there is no record, 40 will output the radio 40 and the approaching threshold" to avoid the warning message to continue the debt measurement and close the radio phase ~ predetermined signal; intensity, | standby; when & when the j line electricity m use the machine It ’s better to send a message to the user than the time of the know-how. With the strength, and the proper real estate, you can know that the unfavorable communication number will use the distance because the method of the invention is not used. The non-standard mute of the invention is in standby. Detecting a warning message during a debt call The terrain or surrounding environmental factors of the call during this call, the user 'tests the non-standard static number through the wireless audio signal of the user, so when the quality is the situation, there is always Standard radio intercom number, but no standard mute audio and audio will be subject to radio to varying degrees regardless of whether or not, audio signal i Page 14 1220339 V. Description of the invention (11) The degree detection can properly understand the radio intercom Communication distance, once users receive the warning signal, they can end the call as soon as possible or shorten the call distance between each other to avoid sudden communication. Problems such as interruptions in communication or poor call quality. The above description is only a preferred embodiment of the present invention. Any equal changes and modifications made in accordance with the scope of the patent application of the present invention are covered by the patent of the present invention.

Page 15 1220339 Brief description of the diagram Brief description of the diagram Figure 1 is a schematic diagram of the frequency range used in the conventional continuous audio coding mute system. Figure 2 is a functional block diagram of a conventional radio. FIG. 3 is a schematic diagram of the appearance of a radio intercom according to the present invention. FIG. 4 is a functional diagram of a radio intercom according to the present invention. FIG. 5 is a timing diagram of transmitting signals according to the present invention. Figure 6 shows the operation flow of the radio intercom to identify the radio signal. Explanation of symbols in the drawings 10, 30, 40 Radio intercom 11 Antenna 12 Transceiver 14 Selector 1 6, 3 6, 4 6 Processor 1 7, 4 4 ° Glave eight 18, 34 Microphone 20 Voice signal processing unit 32 Call Key 38 radio transmitter 42 radio receiver 45 detection circuit 35, 48 timer

Page 16

Claims (1)

Page change 丨 Change / View 6, 18 ——— Up Dagger——G Light 92105707 ______________________________ Main ———— i________________a 丨 六 、 Scope of Patent Application | 1. A method for generating a signal on a first-line radio 5 j • Provide a detection circuit in the radio two-way radio and — timer 'Use this timer to time when the 钲 η', the radio two-way radio receives the signal containing standard mute audio signal, and use the detection after the radio signal The circuit detects whether the signal strength of the φ line signal is greater than a predetermined value. When the radio walkie-talkie receives a benefit line signal containing a non-standard mute audio signal, J uses the detection circuit to detect whether the signal strength of the radio signal is greater than If the predetermined value is greater than the signal strength of the radio signal Reset the speech at the predetermined value j: and when the time recorded by the timer reaches the predetermined time 1 Use the * radio to send an indication signal 〇2. Please use the patent if you want The method according to item 1, wherein the predetermined value is greater than the receiving strength of the radio signal that the radio can receive. 3. A method for generating a radio signal by the radio 9 includes: Providing a timer; using the timer to count; and Page 17 1220339 f Page change case number 92105707 _______J________________a ______Check JL ——------------- Q- VI. Patent application scope When the time recorded by the timer reaches a predetermined time At that time, the radio walkie-talkie is used to output a wireless i-telephone signal containing a non-standard mute audio signal for a predetermined time. 4. The method of claim 3, wherein the radio intercom | includes a call key, and the method further includes that when the call key is touched, the radio intercom outputs a radio signal including a standard mute audio signal 0 5. Such as The method described in item 3 of the scope of patent application, wherein the frequency of the non-standard mute audio signal is between 62.5 Hz and 250 Hz, but does not include the frequency defined by the standard mute audio signal. Page 18 / Number 1 12 -p: .. 』r) or-'i.;. Lu 4.¾ + 9 years Repair ΟΓ