CN2290151Y - Automatic frequency search traffic information receiver - Google Patents
Automatic frequency search traffic information receiver Download PDFInfo
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- CN2290151Y CN2290151Y CN 97201936 CN97201936U CN2290151Y CN 2290151 Y CN2290151 Y CN 2290151Y CN 97201936 CN97201936 CN 97201936 CN 97201936 U CN97201936 U CN 97201936U CN 2290151 Y CN2290151 Y CN 2290151Y
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Abstract
The utility model relates to an automatic frequency search traffic information receiver. The utility model is composed of a high frequency head (1), a microcontroller (2), an RDS demodulating part (3), an SCA demodulating part (4), a power amplifying part (5), and execution part (6) and a loudspeaker (7). When the utility model is adopted, the local frequency which is used for the frequency search of the all band of the FM is changed; the locking action is realized according to an effective RDS signal; according to the TP code and the TA code of the RDS, by the switch of the execution part, the sound reproduction of an SCA speech signal can be realized by the loudspeaker, or an action signal of an alarm device can be output; thus, a user can listen the calling information of a traffic station, or an anti-theft device is controlled. The utility model can do automatic frequency search, so vehicles which are in different traffic stations can be received with the traffic information. The utility model also has the functions of calling, lost reporting alarm, anti-theft control, etc. The utility model has the advantages of high universality and wide application range.
Description
The utility model relates to traffic information receiver, more specifically, relates to and utilizes radio data system (RDS) numeric data code signal to carry out the traffic information receiver of frequency search.
Economic Development is brought the rapid increase of vehicular traffic, and the information interchange to vehicle becomes very urgent thereupon.Usually, transport information is occupied the position by the issue of traffic platform in the FM wave band.Existing traffic information receiver is to be fixed on the traffic platform frequency, and its function is to listen to the condition of road surface message etc. of urban transportation platform issue.This receiver function is single, and receiver only is fit to a traffic platform, and not only producing receiver must have plurality of specifications adapting to different cities, and vehicle over-boundary drives to the information that other cities may can not receive the local transit platform, the scope of application is little, and use is restricted.In addition, now far just do not report road conditions by the transport information of broadcast band issue, for example, may also have paging vehicle, vehicle stolenly report to the police, antitheft, report the loss etc., therefore require receiver also function corresponding should be arranged.
Traffic Announcement broadcasts in FM wave band 87.5-108MHZ, among its voice channel 0-100KHZ except that main channel takies 0-5KHZ, broadcast radio data system (RDS) numeric data code at the 57KHZ place, broadcast auxiliary activities subchannel (SCA) speech sound signal at the 67KHZ place, detect TP sign indicating number among the RDS and be 1 and can confirm to exist the traffic platform, and be that transport information is being broadcasted when the TA sign indicating number is 1, the TA sign indicating number is to be other information issues at 0 o'clock.The purpose of this utility model provides a kind of traffic information receiver of automatic frequency search in view of the above, can be to utilizing the RDS signal to search in the whole FM audio range frequency scope, and control auxiliary activities information (SCA) voice subchannel switches the information of realization automatic reception traffic platform in real time.
The technical solution of the utility model is: a kind of automatic frequency search traffic information receiver, by tuner 1, microcontroller 2, RDS demodulation section 3, SCA demodulation section 4, power amplifier portion 5, execution portion 6, and loud speaker 7 form, it is characterized in that: described execution portion comprises first and second relay; Described tuner changes local frequency by described microprocessor controls, to FM broadcast singal working frequency search by the antenna feed-in, and by effective RDS semaphore lock, output RDS and the compound signal of SCA; Described composite signal is sent into described RDS demodulation section simultaneously and the SCA demodulation section is decoded; The SCA signal of decoding is delivered to power amplifier portion input, and power amplifier portion output is received the input of execution portion first relay contact; The RDS numeric data code of decoding is sent into microcontroller, differentiates its TP and TA sign indicating number, and when TP, TA sign indicating number are 1, or TP is 1, TA be 0 and when identifying paging signal microcontroller export first control signal; When TP is 1, TA be 0 and when identifying alarm signal microcontroller export second control signal; The output of described power amplifier portion received described loud speaker by first relay that described first control signal is controlled described execution portion; Described second control signal is controlled second actuating of relay of described execution portion, output contact actuating signal; The memory of described microcontroller is with this machine address.
Can also establish keyboard 8 in the technical solutions of the utility model, feed to microcontroller and key in essential instruction, press instruction works by microcontroller.
The utility model scheme can make this receiver can be operated in the area of the traffic platform of different frequency to FM all band frequency scanning by frequency sweep, and trans-regional the travelling of vehicle still can be received the broadcasting of corresponding traffic platform at any time, and the versatility height is widely applicable.
The utility model scheme can be made corresponding action by execution portion respectively and be switched by the control signal of microcontroller output corresponding to all information among the RDS, for example, to paging information, switches to broadcast as and broadcasts the paging voice; To reporting the loss warning information, switch to warning signal demonstration, control safety shutdown device etc. and reach antitheft purpose.
The course of work of the utility model receiver can be as follows referring to accompanying drawing 2 flowchart texts.This is the main flow of a working portion.
After the work beginning, tuner 1 local frequency is by original position step-length increase working frequency search in accordance with regulations, when the TP sign indicating number is 1 among the RDS on finding tuned frequency is the traffic platform, if its TA sign indicating number also is 1, this be the traffic platform broadcasting transport information (S1 → S2), Traffic Announcement is handled and is meant that microcontroller sends first control signal, is switched by execution portion first relay, with its speech signal by loud speaker put by, this is a situation of listening to traffic platform broadcasting; If TA=0, whether microcontroller differentiates paging command (S3), in this way, relatively this machine address of reserving in its address and the microcontroller conform to (S4), do paging and handle (S5), promptly microcontroller sends first control signal is emitted the paging language and stopped (releasing) calling by loud speaker by first relay switching of execution portion operation; Whether when identifying non-paging command, then will continue by microcontroller to differentiate alert command (S6), in this way, compare address conforms to and makes alarming processing (S8) after (S7), promptly provide execution portion second relay contact action (closed or open), the contact actuating signal goes to control the execution of any precautionary measures thus, for example automobile flameout device, warning signal display unit etc.
Return (S9) in the flow chart and be meant the state that continues search of waiting for that turns back to.
Fig. 1 is the formation block diagram of the utility model scheme.
Fig. 2 is the workflow diagram of the utility model scheme.
Fig. 3 is the utility model embodiment circuit diagram.For the purpose of clear, the view picture circuit diagram is divided into a, and b two width of cloth illustrate.
Describe embodiment in detail below in conjunction with accompanying drawing 3, by embodiment can clearer understanding the utility model scheme structure and characteristics.
Present embodiment medium-high frequency 1 comprises the IC1 that is made of TDA7088T and the Q1 that is made of C1906,9014,9015,9015 respectively, Q2, Q3, Q4 and peripheral circuit thereof (down with);
Microcontroller comprises IC5, the IC6 that is made of 68HC705JIA and 93C46 respectively;
The RDS demodulation section comprises the IC4 that is made of SAA6579T;
The SCA demodulation section comprises that the IC2, the IC3 that are made of MC3361, SA576 respectively reach by 9014,9014 Q5 that constitute, Q6;
Power amplifier portion comprises the IC9 that is made of TDA2003;
Execution portion comprises the Q7 that is made of control element 8050 of first relay be made up of JZ1, JZ2 and it and second relay that is made of JZ3 and by 8050 its control element Q8 that constitute;
Loud speaker is S1.
In addition, each IC7, IC8 that is made of 78L05 is essential power supply.
Each connecting relation is:
1, high frequency receives
The high-frequency signal that antenna is come in, through B1 (band pass filter) filtering, the Q1 frequency-selecting is amplified, and delivers to IC1 the 11st pin, through the inner mixing of IC1, in put, frequency discrimination is from the MPX composite signal of 2 pin output (RDS+SCA), this signal cushions through the Q2 follower, send into a band pass filter of forming by inner amplifier of IC2 and peripheral cell, the RDS+SCA signal is carried out frequency-selecting amplify, export from IC2 the 11st pin.
The voltage of IC1 the 16th pin, charging obtains to capacitor C 14 (100nF) by its inner constant-current source.This voltage decision local frequency, that is determined the frequency of received signal, change this magnitude of voltage, promptly change the capacitance of capacitor C T1 (variable capacitance diode), thereby change local frequency, the change of this voltage provides a suitable positive pulse of width to reach by IC5 the 18th pin (SEEK), cooperates suitable time-delay, but with regard to automatic frequency search.This process reaches two purposes, and the first, receiver can be searched in FM gold wavelength band, can be locked in the Frequency point at local transit platform place according to effective RDS signal at last.The second, after frequency lock, produce AFC (automatic frequency control) effect, avoid frequency drift.
2, SCA reconciles and power amplifier
RDS+SCA signal by the output of IC2 the 11st pin is isolated through R13, L3, the C29 frequency-selecting, taking out carrier frequency is the SCA FM signal of 67KHZ, and with the local oscillation signal mixing of the inner 522KHZ of IC2, difference goes out 455KHZ second intermediate frequency, in IC2 inside, put, frequency discrimination is from 9 pin output audio signals, i.e. transport information or paging information.This signal is through R16, R17, and C33, C34 filtering, the noise signal that filtering 3KHZ is above send IC3 the 1st pin to decompress, and sends audio signal through decompressing from IC3 the 4th pin, send IC9 power amplifier, after JZ1 switches to loud speaker S1 output.
From microcontroller VOL pin (IC5 the 16th pin) but send PWM (pulse-width modulation) signal of manual adjustment duty ratio here, through R22, R24, C38, direct voltage is taken out in C39 filtering, the conducting degree of control Q6 changes Q6 C-E resistance, reaches the purpose of control volume.
3, RDS demodulation and microcontroller
The RDS+SCA signal of IC2 the 11st pin output is delivered to IC4 the 4th pin through C43 simultaneously, after the decoding, and 16 pin output RDS clock signal, 2 pin are exported the RDS serial data signal, deliver to 19 and 3 pin of microcontroller IC5 respectively.TP in receiving the RDS signal, when the TA sign indicating number is " 1 ", IC5 the 14th pin output high level, this is first control signal, the Q7 conducting, and the JZ1 in first relay switches, + 12V power supply is delivered to power discharging IC 9, JZ2 in first relay switches simultaneously, and loud speaker S1 inserts, the audio signal of output SCA subchannel.Work as TP=1, during TA=0,14 pin output low levels, Q7 ends, and the first relay J Z1, JZ2 restore, and cut off amplifier power supply, loud speaker S1 " is returned " give main channel.IC6 deposits this machine individual address, group address, and other rewritable data messages.When " paging " ordered in receiving the RDS signal, IC5 compared address of paging with this machine address, as meets, and then 14 pin are high level, and this is first control signal also, and voice paging information is by power discharging IC 9, loud speaker S1 output.When receiving " reporting the loss alarm " order, IC5 will alarm the address similarly and compare with this machine address, as meet, then 13 pin (AL) are exported high level, and this is second control signal, the Q8 conducting, the second relay J Z3 switches, and sends a pair of relay tip signal (opening or closure), the alarm device that control is additional in addition, or the safety shutdown device, reach the purpose that automobile burglar is alarmed.When 13 pin output low levels, remove alarm.
Mention 17 pin (MUTE) squelch control above the control of IC5 the 16th pin (VOL) volume.15 pin (RST) and 18 pin (SEEK) are respectively the reseting controling end and the frequency search control end of IC1 frequency sweep, and the former makes the IC1 local frequency minimum, receive the signal of FM wave band least significant end; The latter makes step-length of local frequency rising, cooperates by software, realizes the frequency search function.
IC5 the 4th, 5 in this example, and 6 pin connect three external buttons 8 respectively, can be for inserting extra order, and external two light-emitting diodes of the 11st, 12 pin are for showing search or tuning state.
Claims (3)
1, a kind of automatic frequency search traffic information receiver is made up of tuner (1), microcontroller (2), RDS demodulation section (3), SCA demodulation section (4), power amplifier portion (5), execution portion (6) and loud speaker (7), it is characterized in that:
Described execution portion comprises first, second relay;
Described tuner changes local frequency by described microprocessor controls, to FM broadcast singal working frequency search by the antenna feed-in, and by effective RDS semaphore lock, output RDS and the compound signal of SCA;
Described composite signal sends into described RDS demodulation section simultaneously and described SCA demodulation section is decoded;
Described decoded SCA signal is delivered to described power amplifier portion input, and the output of power amplifier portion is received the input of execution portion first relay contact;
Described decoded RDS numeric data code is sent into microcontroller, differentiates its TP and TA sign indicating number, and TP and TA sign indicating number are 1, or TP is 1, TA be 0 and when identifying paging signal microcontroller export first control signal; When TP is 1, TA be 0 and when identifying alarm signal microcontroller export second control signal;
The output of described power amplifier portion received described loud speaker by first relay that described first control signal is controlled described execution portion;
Described second control signal is controlled second actuating of relay of described execution portion, output contact actuating signal;
The memory of described microcontroller is with this machine address.
2, receiver according to claim 1 is characterized in that having keyboard to insert described microcontroller, for the input extra order.
3, according to claim 1 or 2 any one described receiver, its feature: the formation that is described tuner (1) comprises integrated component IC1, TDA7088T;
The formation of described microcontroller (2) comprises integrated component IC5,68HC705JIA, and IC6,93C46;
The formation of described RDS demodulation section (3) comprises integrated component IC4, SAA6579T;
The formation of described SCA demodulation section (4) comprises integrated component IC2, MC3361, and IC3, SA576;
The formation of described power amplifier portion (5) comprises integrated component IC9, TDA2003;
The change that changes described IC1 the 16th pin voltage of local frequency provides positive pulse to carry out by described IC5 the 18th pin;
Described first control signal is the high level of described IC5 the 14th pin output, controls the switching of first relay power supply is added to described IC9, and connect the output of described loud speaker (S1) to described IC9;
Described second control signal is the high level of described IC5 the 13rd pin output, controls described second actuating of relay and produces the contact actuating signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97201936 CN2290151Y (en) | 1997-03-21 | 1997-03-21 | Automatic frequency search traffic information receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97201936 CN2290151Y (en) | 1997-03-21 | 1997-03-21 | Automatic frequency search traffic information receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2290151Y true CN2290151Y (en) | 1998-09-02 |
Family
ID=33923216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97201936 Expired - Fee Related CN2290151Y (en) | 1997-03-21 | 1997-03-21 | Automatic frequency search traffic information receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2290151Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227243B (en) * | 2007-01-19 | 2012-01-18 | 罗姆股份有限公司 | Fm transmitter supporting broadcast/wireless broadcast data system and channel selecting method |
| CN109088688A (en) * | 2018-09-29 | 2018-12-25 | 四川省广播电视科研所 | The same broadcasting method that RDS and SCA is combined |
-
1997
- 1997-03-21 CN CN 97201936 patent/CN2290151Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227243B (en) * | 2007-01-19 | 2012-01-18 | 罗姆股份有限公司 | Fm transmitter supporting broadcast/wireless broadcast data system and channel selecting method |
| CN109088688A (en) * | 2018-09-29 | 2018-12-25 | 四川省广播电视科研所 | The same broadcasting method that RDS and SCA is combined |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |