CN201022192Y

CN201022192Y - A radio

Info

Publication number: CN201022192Y
Application number: CNU2007200350617U
Authority: CN
Inventors: 沈君; 黄强; 胥锐; 许正凯; 王文川; 高正东
Original assignee: CETC 38 Research Institute
Current assignee: CETC 38 Research Institute
Priority date: 2007-03-12
Filing date: 2007-03-12
Publication date: 2008-02-13
Anticipated expiration: 2017-03-12

Abstract

The utility model relates to a radio which belongs to the vehicle digital tuning radio field and comprises a GPS receiver, a radio modular, a main controlling unit, a displaying modular, a memorizer, a button controlling modular. The main controlling unit identifies and displays the radio station according to a GPS signal and the radio frequency information which are provided by the memorizer, achieving the automatic identification of the radio station. The utility model solves the technical problem of the prior digital tuning radio which can not realize the automatic identification of the radio station and has the advantages of high sensitivity, high identifying rate, simple structure and easy manufacturing.

Description

A kind of broadcast receiver

Technical field

The utility model relates to a kind of broadcast receiver, especially the tuning broadcast receiver of vehicle-mounted digital.

Background technology

Today China, automobile pollution constantly increases, and after American-European countries became a reality, China had also showed same version once more continue the mythology of " wheel rescue broadcasting ".Broadcast receiver is as the instrument that receives broadcasting, and the evolution through very long develops into multiband by single band; Develop into integrated circuit by electron tube, transistor; Develop into digital tuning by mechanical tuning, function and quality have had significant progress.Digital tuning broadcast receiver system has obtained using widely at present, use the FM radio station of this system that conveyer is had to the performance that transmits signal increase fresh information, letter and number before the broadcast receiver on the control panel, even Chinese display screen can roll display information.Traditional digital radio receiver display screen can be accomplished identification, shows and store for the frequency in radio station, and can only or compose to fixed name by the manual input of user for station name, as CH1, CH2 etc.At present, digital tuning broadcast receiver both domestic and external can only be realized by the mode of artificial input for station name.

The utility model content

Technical problem to be solved in the utility model provides a kind of broadcast receiver that can discern frequency of radio station automatically and show station name.

The technical scheme that the utility model adopted is: a kind of broadcast receiver, by gps receiver, the radio reception module, main control unit, display module, memory, the button control module is formed, gps receiver, the radio reception module, display module, memory, the button control module is connected with main control unit respectively, gps receiver is imported main control unit with current geographic position information, memory is with corresponding frequency of radio station and name list information input main control unit, the button control module is with channel selection control information input main control unit, the radio reception module is input to main control unit with frequency of radio station information after searching the radio station according to the channel selection control information, and main control unit outputs to display module with the station name information of confirming and shows.

Good effect of the present utility model is: the utility model on the tuning wireless basis of conventional digital in conjunction with the GPS technology, for traditional digital tuning broadcast receiver brings better man-machine interface and operator scheme.Use this broadcast receiver, can discern current location, and be the automatically name and show of the current frequency of radio station of listening to, realize knowing automatically the function of platform by display screen by the station list in the memory by GPS.The mode that adopts GPS to combine based on the automatic knowledge platform broadcast receiver of GPS with digital radio receiver, have highly sensitive, characteristics such as discrimination is high, easy realization simple in structure, can be widely used in portable broadcasting frequency receiver, Source Music, MP3, MP4, mobile phone etc.; Can also be applied in the vehicle-mounted audio-video system and navigation system.

Description of drawings

Fig. 1 is a schematic block circuit diagram of the present utility model

Fig. 2 is the concrete element annexation of the utility model figure

Embodiment

Below in conjunction with accompanying drawing the utility model is further described.

Automatically know the platform broadcast receiver and on the basis of normally used digital radio receiver, install GPS receiver module and frequency of radio station table memory additional.The GPS module is responsible for receiving gps satellite signal to determine current geographical position, and memory has frequency of radio station and corresponding with it station name.With the FM tuned radio frequency is example, " broadcasting and television frequency are divided table " of China stipulated that 88 ~ 108MHz is FM broadcasting and digital broadcasting frequency range, frequency bandwidth is the minimum at interval 150KHz of being in radio station, that is to say in the scope that regulation allows and can hold more than 100 radio station altogether.It is big or small and different that the frequency bandwidth of this reservation is looked the adjacent channel power of radio station.China's f-m broadcast station is divided into three classes such as high-power, middle power, small-power, listens to that good to contain radius be respectively 60 kilometers, 20 kilometers, below 10 kilometers.Generally speaking, in the same service area, small power electric interstation channel spacing is about between 400KHz, middle power radio station channel spacing and is about 600KHz, large power, electrically interstation channel spacing and is about 800 or 600KHz.Establishing aspect the spacing distance of platform, small-power is with palpus at interval must be at least at a distance of more than 55 kilometers frequently, at least apart more than 15 kilometers, the second adjacent interval frequently must be at least apart more than 5.5 kilometers at the first adjacent palpus frequently interval, and the 3rd neighbour frequently at interval must be at least apart more than 5.1 kilometers; Middle power is with the interval must be at least apart more than 110 kilometers frequently, and first neighbour frequently at interval must be at least apart more than 30 kilometers, and second neighbour's frequency at interval must be at least at a distance of more than 11 kilometers, and the 3rd neighbour's frequency interval is at least at a distance of more than 10 kilometers; High-power with the interval must be at least at a distance of more than 330 kilometers frequently, first neighbour frequently at interval must be at least apart more than 90 kilometers, and the second adjacent frequency at interval must be at least at a distance of more than 33 kilometers, and the 3rd neighbour interval frequently must be at least at a distance of more than 30 kilometers.So, read the present located geographical position by GPS, just can judge with the current location according to the data of storage is that how many FM radio station and titles thereof are arranged in center maximum radius 60 kilometer range, thereby realizes identification station name automatically.

Automatic knowledge platform broadcast receiver scheme based on GPS is seen Fig. 1, is made up of gps receiver 1, radio reception module 2, main control unit 4 and memory 3, display module 5, button control module 6 respectively.Gps receiver, radio reception module, display module, memory, button control module are connected with main control unit respectively, gps receiver is imported main control unit with current geographic position information, memory is with corresponding frequency of radio station and name list information input main control unit, the button control module is with channel selection control information input main control unit, the radio reception module is input to main control unit with frequency of radio station information after searching the radio station according to the channel selection control information, and main control unit outputs to display module with the station name information of confirming and shows.

Behind the system boot, send the location information request instruction by single-chip microcomputer 4 to gps receiver 1 earlier, send current geographic position information by gps receiver 1 to main control unit 4 then; Main control unit 4 is read corresponding frequency of radio station and name list according to current geographic position from memory 3; Start radio receiver module 2, search platform or channel selection operation by button control module 6 control radio receiver modules 2; After searching a frequency that the radio station arranged, frequency information coupling frequency of radio station and name list that main control unit 4 is sent according to radio receiver module 2, main control unit 4 sends to display module 5 with the frequency that draws and station name and shows.

Because the broadcast receiver system is installed on the vehicle or the mobile phone carried on, so the geographical position often changes.Start back gps receiver 1 sends a geographical location information every a fixing cycle (as 1 hour) to main control unit 4, upgrade the current location information data by main control unit 4, if new geographical location information is different with historical geographical location information, then main control unit 4 is read corresponding frequency of radio station and name list according to new geographical location information from memory 3.During system closedown, the last geographical location information of main control unit 4 memories, the last geographical position that main control unit 4 then used memory when started shooting next time when the failure of GPS request geographical location information.

The annexation of the concrete element that the utility model adopted as shown in Figure 2.The main control unit of native system is selected the STR712 microcontroller of STMicw Electronics (ST) for use, the STR712 microcontroller is based on high performance ARM7TDMI kernel, the RAM memory of the Flash memory of integrated 256+16K byte and 64K on the sheet has the I/O function of abundant peripheral hardware and enhancing.The performance power consumption of this controller is than very good, and the kernel support comprises Thumb instruction set, Fast Multiplication instruction and embedded ICE debugging technique.Because it is embedded ARM kernel, so compatible mutually with all ARM instrument and software.

What the GPS module of native system was selected for use is the iTrax02GPS receiver of FastraX, iTrax02 is the Embedded GPS OEM plate of volume minimum in the world, power consumption 80uW only during dormancy, be no more than 110mW during continuous navigation, and in its 8 seconds only from the dormancy to the navigator fix, have the signal that is exceedingly fast and obtain engine.Be specially adapted to hand-held devices such as PDA, hand-held set.From the interface of iTrax02, it carries 2 UART interfaces, can receive data and binary iTack formatted data of NMEA0183 form, wherein the exportable pseudo-short value of iTack data, ephemeris value and some other initial data.For making things convenient for product design, also have 16 tunnel GPIO and SPI interface on the iTrax02, can control and the extension storage space it easily.The Flash of the embedded 8M bit of iTrax02 can be used for storing the interfix data, and uses for time service high precision is provided.

Radio receiver module is selected the stereo radio reception plate of electric tuning AM/FM of the LC72131 chip of SANYO GS company (SANYO) for use.Radio reception plate circuit performance is stable, and is highly sensitive, adopted superhet double conversion technology.The tuning receive frequency range 87.00MHz ~ 108.00MHz of frequency modulation, step frequency is 50/100kHz, IF-FRE is 10.70MHz; Middle harmonic tuning receive frequency range 522kHz ~ 1611kHz, step frequency is 9/10kHz, IF-FRE is 450kHz.Finish control to it by main control unit by the I/O mouth, dual-channel audio output is sent loud speaker by the multimedia communication interface after amplifying.

LCD MODULE is selected MCG12864A8-3 for use, it is a kind of large-sized solor dot matrix (or diagram form) LCD, friendly interface, attractive in appearance, not only can character display, numeral, can also show various figures, curve and Chinese character, and can realize functions such as screen rolling up and down, animation, flicker, text feature demonstration, purposes is very extensive.This LCD MODULE is to use KS0108B and compatible Control Driver (for example HD61203B) thereof as row driver, uses KS0107B and compatible driver thereof (for example HD61203) Liquid Crystal Module as line driver simultaneously.Because KS0107B (or HD61203B) does not get in touch with MPU, so as long as provide power supply just can produce horizontal-drive signal and various synchronizing signal.Can directly control the control signal of LCD by universaling I/O port with single-chip microcomputer, simultaneously with a certain I/O mouth of single-chip microcomputer as its data/address bus.

Claims

1. broadcast receiver, by gps receiver [1], radio reception module [2], main control unit [4], display module [5], memory [3], button control module [6] is formed, it is characterized in that: gps receiver, the radio reception module, display module, memory, the button control module is connected with main control unit respectively, gps receiver is imported main control unit with current geographic position information, memory is with corresponding frequency of radio station and name list information input main control unit, the button control module is with channel selection control information input main control unit, the radio reception module is input to main control unit with frequency of radio station information after searching the radio station according to the channel selection control information, and main control unit outputs to display module with the station name information of confirming and shows.