CN2450831Y

CN2450831Y - Portable DARC radio data receiving card

Info

Publication number: CN2450831Y
Application number: CN 00259713
Authority: CN
Inventors: 朱红霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-11-03
Filing date: 2000-11-03
Publication date: 2001-09-26
Anticipated expiration: 2010-11-03

Abstract

The utility model relates to a portable DARC radio data receiving card which is mainly composed of a radio-frequency head, a CPU, a data radio channel (DARC) signal decoding circuit, an electric power management circuit, an antenna and a battery, wherein the CPU controls the radio-frequency head to realize electronic tuning. The utility model automatically receives frequency modulated signals containing DARC signals by the antenna, and sends a subchannel signal output by the radio-frequency head into the DARC decoding circuit. Data information carried in the DARC signal is decoded and transmitted to external devices, such as palmtop computers, business communication devices, managers, etc. by a serial port. The utility model has the advantages of small volume, high speed, low cost, wide receiving range and movable reception, widens the function of the external devices, and is applicable to transferring words, figures and images.

Description

Portable DARC wireless data receiver card

The utility model relates to a kind of wireless data broadcasting receiving system, particularly a kind of Portable DARC wireless data receiver card.

Data broadcasting is the third broadcast type after sound radio, television broadcasting.Wireless data broadcasting is the new technology of developing on traditional sound radio basis, in sound radio, carries out wirelessly transmitting data.Mainly contain two kinds of forms: a kind of is to utilize amplitude modulation (AM) broadcasting, and another kind is to utilize frequency modulation (FM) broadcasting, also claims the f-m multiplex data broadcasting.It is a vacant part of utilizing the FM broadcasting frequency spectrum, and just the subchannel of FM broadcasting is set up data channel and carried out point-to-point, point-to-area data broadcasting mode.Make traditional FM broadcasting that only has sound radio to have the ability of wireless data broadcasting, existing stereophonic signal has data-signal again, is suitable for the transmission of literal, figure and intelligence data.The technology of utilizing the FM broadcasting subchannel to carry out data broadcasting has several, and is extensive in the countries use of prosperity.For example the U.S., Germany, Japan, Sweden etc. have all founded the f-m multiplex data broadcast service, can provide various information for the user, comprising: news, weather forecast, transport information, sports tournament, financial market, tourist shopping etc.

(DAta Radio Channel DARC), is called for short the DARC technology to the data wireless radio channel, is the f-m multiplex high-speed datacasting technology of NHK (NHK) exploitation.DARC is the trade mark of NHK (NHK) for this technology registration, is recommended as international standard in nineteen ninety-five through International Telecommunications Union: Rec.ITU-R BS.1194.Modulation system and coding structure that the DARC technology adopts, in numerous datacastings, belong to not only be suitable for fixingly receiving, but also be suitable for moving receive, a kind of data broadcasting mode that transmission capacity is big.

Carry out the system of wireless data transmission, for example treasured book 828 systems all are to adopt the call technology.What common call was adopted is POCSAG coding system, and speed is 1200bps, and user capacity is limited, and transmissible information is few.The high speed calling coding had appearred afterwards, after the page station is undergone technological transformation, can transmit more information, as the treasured book 828 of Motorola's release, what adopt is the FLEX technology, speed is 6.4kbit/s, and effective data rate is about 4kbit/s, but still has data quantity transmitted few, range of receiving is little, mobile receiving ability is poor, defect of high cost, and data wireless radio channel (DARC) technology does not also have promotion and application in China.

The purpose of this utility model is: utilize the DARC technology, make external equipment can have the ability of wireless receiving data by this receiving card, expand the application function of external equipment.For example, palmtop PC, PDA etc. have had visual function, on the basis of this function, this receiving card is installed again, be wireless data receiver card, just can receive information whenever and wherever possible in real time, comprise Word message and image information etc., every in the coverage of FM broadcasting, can receive signal.Like this, on original termination function, realized the fusion of broadcasting and communication, expanded new function, realized wireless Palm Pilots and wireless PDA, it is reached:

1, when the FM subchannel transmits the DARC signal, do not hinder the transmission of stereophonic signal, transmission when can realize sound, writings and image.

2, make full use of existing resource.In channel resource extremely limited today, native system does not need to apply for independent frequency again, need not pay the frequency occupancy, just utilizes the subchannel of FM broadcasting, does not influence original broadcast operation fully.

3, wide coverage, service range is wide.The coverage of FM broadcasting is exactly the service range of native system; because its transmission is digital signal; and very strong error protection is arranged; therefore; in actual applications; the coverage of native system is bigger than the coverage of FM broadcasting, and when broadcasting sound signal can not normally receive, the digital signal that native system transmits still can correctly receive.Existing broadcast system has covered the area in the whole nation 85%, so the national network of native system can cover the population in the whole nation 85% at least.

4, can transmit enough information for mobile recipient.

5, the speed height of transmission data, speed is 16kbit/s, effective data rate can reach 9.7kbit/s.

The purpose of this utility model is achieved through the following technical solutions: Portable DARC wireless data receiver card, mainly by tuner, CPU (CPU), data wireless radio channel (DARC) signal decoding circuit, electric power management circuit, serial i/o interface, external equipment, antenna (Antenna), battery constitute, and wherein antenna (Antenna) links to each other with the tuner antenna; The data wire (DATA) of CPU (CPU), Writing/Reading control line (WR/RD), output terminal of clock (CLK), tuning control input end (TUNE) link to each other with tuner respectively; The data wire (DATA) of CPU (CPU), address wire (ADDRESS), control line (INT), chip select line (CS), removing control line (CLR), outside output control line (XOUTC) join with the DARC signal decoding circuit respectively; The data of CPU (CPU) send (TXD) and Data Receiving (RXD) is held the serial I/O end that is connected to external equipment; The voltage of battery output inputs to tuner, CPU (CPU) and DARC signal decoding circuit through power supervisor; The input voltage of power supervisor is the 15-3 volt, and its output voltage is respectively 3.3 volts and 12 volts; The receive frequency range of tuner is 87-108MHz.

The utility model has the advantages that:

1, transmission rate is big.Speed is 16Kbit/s, and effective data rate is 9.7Kbit/s, information the containing much information more than treasured book 828 receptions of adopting this receiving card to receive in the same time.And this receiving card can realize receiving in real time information, for example can be used for transmitting stock information, make the stock invester can in time understand quotations on the stock market, and treasured book 828 can not realize transmitting in real time the function of information.

2, range of receiving is big.Because what adopt is FM broadcasting subchannel technology, the every place that can receive in FM broadcasting utilizes this receiving card can receive information, and its range of receiving is much larger than the range of receiving of treasured book 828, pager etc.

3, portable dexterity.The volume of this receiving card is little, has only the business card size, is easy to carry.Serial input-output interface (SIO) with three cores can be connected with hand-hold type external equipment (as palmtop PC, PDA etc.) easily.Receive, the data message of decoding is sent to external equipment by antenna (Antenna), handle by external equipment again, as display text, figure, image etc., make these hand-hold type external equipments become the equipment that can receive a large amount of letter bags whenever and wherever possible by wireless mode, expanded their function greatly by isolated display terminal.This receiving card can also couple together with the Portable MP 3 player of current trend.Pass through Wireless transmission mode, the MP3 music is sent to player, make that MP3 player user not only can be by wired mode down-load music from the computer, also can be by wireless mode from aerial down-load music, even in the vehicle that travels, transmit also unaffectedly, greatly facilitate MP3 machine user.

4, support to move reception.Receptivity is reliable, and is highly sensitive.The DARC technology is to receive exploitation at moving specially, adopts the receiving card of present technique, can receive data in the vehicle of fast running, and it moves the ability of receiving radio data, and is stronger than treasured book 828 receiving abilities that adopt the pager technology.

5, circuit is ingenious, and power consumption is little.This receiving card adopts the components and parts of low-power consumption by ingenious design, when receiving, and the power saving receive mode that can take timesharing to receive.Auto Power On receives information when data message is arranged, and shuts down automatically when no information.

6, can decide frequency or frequency sweep receives.This receiving card receives voice signal as FM receiver when receiving, just do not need the manufal tuning frequency of radio station, can carry out electronic tuning automatically, finds the frequency of radio station with DARC signal.If there are a plurality of radio station to send the DARC signal, the user can set the frequency of radio station of oneself liking.This receiving card can be remembered this frequency, and automatically locks this frequency when using afterwards, changes frequency if desired, only need reset to get final product.

7, the power supply of this receiving card has dual mode.A kind of is power autonomous battery, and another kind is to be provided by external equipment.The user can independently select according to different situations.

8, easy to use, easy operating.In use, can cross plug to this cartoon and directly be inserted on palmtop PC, the PDA etc., also can link to each other with external equipment by lead.Start/the shutdown of this receiving card can be finished automatically, also can manually be realized by the user as required.

9, applied range.This receiving card can link to each other with palmtop PC, e-commerce etc. by the serial communication line, also can link to each other with notebook computer, Desktop PC, also can link to each other with the information household appliances with serial communications capabilities, electronic bill-board etc.Make these equipment have the ability of wireless receiving data, expanded their function greatly.

10, utilize this receiving card, can make external equipment receive stock information, electronic newspaper information, weather forecast information, airplane flight information, car and boat time information, wireless receiving E-mail information, the wireless information that browses web sites, wireless receiving MP3 music, individual message information, group/individual call information etc.

11, cost is low, only is two, 300 yuan.

Further describe below in conjunction with drawings and Examples:

Fig. 1 is the utility model theory diagram.

Fig. 2 is the utility model circuit theory diagrams.

Symbol description is as follows among the figure:

IC1-FM reception module TA5610

IC2-CPU (CPU) 89C51

IC3-data wireless radio channel (DARC) signal decoding chip MAM9563

IC4-power management chip TI1677

JP1-three core sockets

JP2-two core sockets

As shown in Figure 1 and Figure 2, the utility model Portable DARC wireless data receiver card mainly is made of tuner, CPU (CPU), data wireless radio channel (DARC) signal decoding circuit, electric power management circuit, antenna (Antenna) and battery.Tuner receives from the aerial FM signal that has the DARC signal by antenna (Antenna), the tuner of receiving card is selected small-sized FM receiver module TA5610 for use, it needs two kinds of supply voltages, a kind of groundwork voltage that is 3.3V as module, a kind of is the voltage of 12V, tuning voltage during as automatic frequency sweep, the receive frequency range of TA5610 are 87-108MHz.Antenna (Antenna) adopts small-sized special plate aerial (Antenna), data wire wherein (DATA) links to each other with the P1.1 mouth of CPU (CPU) 89C51, Tuning Control line (TUNE) links to each other with the P1.2 of CPU (CPU), clock (CLK) links to each other with the P1.0 of CPU (CPU), and Writing/Reading control line (WR/RD) links to each other with the P1.3 of CPU (CPU).

CPU (CPU) produces the required clock signal of read-write TA5610 internal memory register, the state when judging that by tuning control line (TUNE) line TA5610 looks for platform automatically by clock (CLK) line; Control the operation that the TA5610 internal register is read or write by Writing/Reading control line (WR/RD); By data wire (DATA), command word or data are write TA5610, or data are read in the internal memory of CPU (CPU) from TA5610.CPU (CPU) is by these modes, can write the TA5610 internal register to the pairing data message of the frequency of radio station that will look for, make tuner carry out electronics and look for platform automatically, the radio station of locking CPU (CPU) appointment has the function that electronics receives surely frequently; CPU (CPU) can judge whether the radio station of finding is desired radio station by the data that read the TA5610 internal register simultaneously, if not, by CPU (CPU) new frequency of radio station value is set, automatically search for, so can finish the function of automatic frequency sweep repeatedly, need not manual intervention.

CPU (CPU) is selected 89C51 for use, 8 single-chip microcomputers.By P.0-P1.3 four I/O (I/0) mouthful line of 89C51, finish control to tuner, achieve the function of looking for platform automatically.

The P0.0--P0.7 of 89C51, eight I/O (I/O) mouthful line links to each other with the D0-D7 of DARC decoding integrated package MAM9 56 3, as data wire.

The P2.0--P2.5 I/O (I/O) of a 89C51 mouthful line links to each other with the A0-A5 of MAM9563, as address wire.

The P1.5 of 89C51 selects control end (CS) to link to each other with the sheet of MAM9563, as the chip selection signal control line of MAM9563.

The P1.6 of 89C51 links to each other with the removing control end (CLR) of MAM9563, as the control line of removing MAM9563 internal register data.

The P1.7.7 of 89C51 links to each other with the outside output control line (XOUTC) of MAM9563, and whether control MAM9563 exports outside oscillator signal, can use for other circuit.

(INT0) of 89C51 links to each other with the interruption controls line (INT) of MAM9563, when MAM9563 has finished certain function, can produce interrupt signal automatically, carries out corresponding routine processes by interruption controls line (INT) notice CPU (CPU).

The control (RD) of reading of 89C51 links to each other with the control (RD) of reading of MAM9563, and by data wire and address wire, reads the state value of MAM9563 internal register, and the user data information that decodes.

The control (WR) of writing of 89C51 links to each other with the control (WR) of writing of MAM9563, and by data wire and address wire the internal register of MAM9563 is carried out the write order operation, makes MAM9563 can finish the work of DARC signal data decoding.

The serial port of 89C51 receives line (RXD), transmission line (TXD) links to each other with the serial port of external equipment, finish the data communication between this receiving card and the external equipment, can receive the order and the data of external equipment, also can be the user data information that decodes, send external equipment to, handle accordingly, as display text on external equipment, figure or image etc.

The DARC signal decoding circuit is selected special-purpose DARC decoding chip MAM9563 for use, receive frequency modulation (FM) the subchannel modulation signal of high frequency tuner circuit output by capacitive coupling, under the control of CPU (CPU), finish the demodulation sign indicating number work of DARC signal, and the data message that decodes, send CPU (CPU) to by data wire, (CPU) sends external equipment to by serial port again by CPU, handles accordingly.

Electric power management circuit is selected chip TI1677 for use, from the battery of outside 1.5v-3v, produces the two-way supply voltage, and one the tunnel is the groundwork voltage of 3.3v/200mA as whole receiving card circuit; One the tunnel is 12v/20mA, the tuning voltage when carrying out automatic frequency sweep as tuner.

In addition, this cartoon is crossed one three core socket JP1 and three-prong plug and external equipment, directly links to each other as palmtop PC, e-commerce, manager's etc. serial port, makes this receiving card send the data of wireless receiving to external equipment.No. 7 batteries of also available 1 joint of battery or 2 joint 1.5v are as total power supply of this receiving card.Can also accept the voltage of the 1.5v-4.5v that external equipment or miscellaneous equipment (as common stabilized voltage power supply) provide by one two core socket JP2, to save the use of battery.

The course of work of the utility model Portable DARC wireless data receiver card is: CPU (CPU) control high frequency tuner circuit, realize electronic automatic tuning, by antenna (Antenna), automatic reception includes frequency modulation (FM) signal of DARC signal, simultaneously the subchannel signal of tuner output is sent into the DARC decoding circuit.Demodulation sign indicating number process through decoding chip inside, decode the data message that carries in the DARC signal, under the control of CPU (CPU), by serial port the data message that receives is sent to external equipment (as palmtop PC, e-commerce, manager etc.), handle accordingly.Make external equipment can receive the wireless data information of utilizing the DARC technology transfer, greatly expanded the function of external equipment by this receiving card.

Claims

1, a kind of Portable DARC wireless data receiver card, mainly constituted by receiving card, antenna (Antenna), battery, it is characterized in that: receiving card mainly includes tuner, CPU (CPU), data wireless radio channel (DARC) signal decoding circuit and electric power management circuit, and described tuner signal input part links to each other with antenna (Antenna); The data wire (DATA) of CPU (CPU), Writing/Reading control line (WR/RD), output terminal of clock (CLK), tuning control input end (TUNE) link to each other with tuner respectively; Under the control of (CPU), tuner energy automatic tuning frequency of radio station is realized frequently fixed or frequency sweep receives frequency modulation (FM) signal with DARC signal; The data wire (DATA) of CPU (CPU), address wire (ADDRESS), control line (INT), chip select line (CS), removing control line (CLR), outside output control line (XOUTC) join with the DARC signal decoding circuit respectively; The data of CPU (CPU) send (TXD) and Data Receiving (RXD) is held the serial line interface that is connected to external equipment, give external equipment transfer of data by serial communication mode; The voltage of battery output inputs to tuner, CPU (CPU) and DARC signal decoding circuit through electric power management circuit.

2, Portable DARC wireless data receiver card according to claim 1 is characterized in that: adopt 1 joint or No. 7 batteries of 2 joints, the output voltage that is produced by electric power management circuit is respectively 3.3 volts and 12 volts.

3, Portable DARC wireless data receiver card according to claim 1 is characterized in that: the receive frequency range of this receiving card is 87-108MHz.