CN2794047Y - Guiding telecommunication device - Google Patents

Abstract

The utility model discloses a guiding telecommunication device, which comprises a transmitting apparatus and a plurality of receiving apparatuses. The utility model is characterized in that the transmitting apparatus comprises a first programmable IC chip, a signal generation circuit, a first RF circuit chip and a first antenna, and every receiving apparatus comprises a second programmable IC chip, a second RF circuit chip, a voice amplifier circuit and a second antenna, wherein the voice amplifier circuit is connected with a headphone; signals generated by the signal generation circuit carries out voice signal collection through an analogue-digital conversion circuit of the first programmable IC chip; the first antenna is used for sending radio wave signals; an analogue-digital conversion circuit of the second programmable IC chip converts the radio wave signals received by the second antenna into analog signals, and then the analog signals is output to the earphone through the voice amplifier circuit. The transmitting apparatus is provided with a frequency point selection preset mechanism. The utility model is convenient and practical and can avoid mutual signal interference as much as possible.

Description

A kind of guide's communication device

Technical field

The utility model relates to a kind of tour guide device, especially relates to a kind of guide's communication device.

Background technology

Existing communication tour guide device be for solve when tourism the guides at the sight spot to visitor's explanation and with visitor's contact, a kind of multi-functional guide interpreting machine is disclosed as No. 94214888.6 Chinese utility model patents that May 31 nineteen ninety-five, bulletin was authorized, the receiver that reflector that is carried by the Guide interpreter and visitor carry is formed, tourist guide's sound is through the audio signal of microphone conversion, form with frequency modulation is launched, when receiving the signal of reflector, utilized the radio reception FM circuit dexterously, can organically radio reception and intercommunication function be combined, convenient and practical, and circuit Rational structure compactness is easy to carry.But the defective of the guide interpreting machine maximum of this mode is exactly to be subjected to extraneous interference easily, if especially have in same scenic spot under the situation of a plurality of travel parties, the signal that is very easy to produce on same channel each other disturbs.And the disclosed a kind of digital recording infrared transmission guide device of No. 99223093.4 Chinese utility model patents that on May 10th, 2000, bulletin was authorized, use infrared ray to transmit, can overcome the phase mutual interference between the various signals, but weak point is an infrared ray to be subjected to the obstruction of barriers such as human body easily and to make receiver can't receive infrared signal, therefore can't get in touch with when the visitor leaves certain distance and has certain barrier.

Summary of the invention

Technical problem to be solved in the utility model is that a kind of convenient and practical and guide's communication device that can avoid signal each other to disturb as far as possible is provided at above-mentioned prior art present situation.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of guide's communication device, comprise an emitter and a plurality of receiving system, described emitter comprises first integrated circuit chip programmable, described first integrated circuit chip programmable is connected with the signal generating circuit and the first radio circuit chip, the described first radio circuit chip is provided with first antenna, described receiving system comprises second integrated circuit chip programmable, described second integrated circuit chip programmable is connected with second radio circuit chip and the audio amplifier circuit, the described second radio circuit chip is provided with second antenna, described audio amplifier circuit is connected with earphone, the signal that described signal generating circuit sends carries out speech signal collection by the analog to digital conversion circuit of described first integrated circuit chip programmable, by the described first antenna transmission radio wave signal that is provided with on the described first radio circuit chip, the radio wave signal that the analog to digital conversion circuit of described second integrated circuit chip programmable will be received by second antenna of the described second radio circuit chip setting converts analog signal to, output to described earphone by described audio amplifier circuit again, described emitter is provided with frequency and selects set mechanism.

Described frequency selects set mechanism to comprise the frequency configuration register that is arranged in the described first radio circuit chip, be preset with a plurality of frequency frequency data in the described frequency configuration register, described first integrated circuit chip programmable is connected with the frequency point setting button, described first integrated circuit chip programmable is provided with the frequency of the described first radio circuit chip by special purpose interface, and, be provided with the register of depositing idle frequency in described first integrated circuit chip programmable at the frequency transmission frequency detection packet that is provided with.

Described first integrated circuit chip programmable is the C8051F020 chip, described second integrated circuit chip programmable is the C8051F330 chip, described first radio circuit chip and the described second radio circuit chip are the NRF905 chip, frequency configuration register in the described first radio circuit chip is preset with 10 frequency frequency data, one end ground connection of described frequency point setting button, the other end of described frequency point setting button is connected with power supply by first resistance, the other end of described frequency point setting button links to each other with the IO port P3.0 of described C8051F020 chip simultaneously, when described frequency point setting button disconnects, P3.0 is a high level, P3.0 is a low level during described frequency point setting button conducting, per 10 seconds frequencies of described C8051F020 chip by SPI interface configuration NRF905, and the frequency transmission frequency detection packet that is being provided with, described idle frequency point data leaves among the FLASHROM of described C8051F020 chip, and the frequency of the described second radio circuit chip is set on the described idle frequency.

Described first integrated circuit chip programmable is connected with liquid crystal indicator and speech play module, and described second integrated circuit chip programmable is connected with microphone and speech processes low-pass filter circuit.

Described signal generating circuit comprises low-pass filter circuit and audio amplifier circuit, and described low-pass filter circuit is connected with microphone, and described audio amplifier circuit is connected with earphone.

Described first integrated circuit chip programmable can be connected with the powerful first auxiliary radio circuit, the described first auxiliary radio circuit is connected with described first antenna, be provided with first diverter switch between the described first auxiliary radio circuit and the described first radio circuit chip, described second integrated circuit chip programmable can be connected with the powerful second auxiliary radio circuit, the described second auxiliary radio circuit is connected with described second antenna, is provided with second diverter switch between the described second auxiliary radio circuit and the described second radio circuit chip.

Guide's communication device of the present utility model can be realized frequency point setting by the following method: by default a plurality of frequency frequency data in the frequency configuration register in the described first radio circuit chip, in described first integrated circuit chip programmable connection frequency point setting button is set, after pressing described frequency point setting button, described first integrated circuit chip programmable is provided with the frequency of the described first radio circuit chip by special purpose interface, and the frequency transmission frequency detection packet that is being provided with, after detecting idle frequency, described idle frequency is left in the register that is provided with in described first integrated circuit chip programmable, and described receiving system is set on the described idle frequency.

Described first integrated circuit chip programmable is set to the C8051F020 chip, described second integrated circuit chip programmable is set to the C8051F330 chip, described first radio circuit chip and the described second radio circuit chip are set to the NRF905 chip, frequency configuration register in the described first radio circuit chip is preset 10 frequency frequency data, one end ground connection of described frequency point setting button, the other end of described frequency point setting button is connected with power supply by first resistance, the other end of described frequency point setting button links to each other with the IO port P3.0 of described C8051F020 chip simultaneously, the described frequency point setting button of conducting, when making P3.0 be low level, per 10 seconds frequencies of described C8051F020 chip by SPI interface configuration NRF905, and the frequency transmission frequency detection packet that is being provided with, the idle frequency point data that detects is left among the FLASH ROM of described C8051F020 chip, and the frequency of the described second radio circuit chip is set on the described idle frequency by common frequency band.

Disconnect described frequency point setting button, when making P3.0 be high level, described frequency selected set mechanism to carry out a frequency selection every 5 minutes.

Compared with prior art, the utlity model has following advantage:

1. adopt the design of low transmitting power and high receiving sensitivity, with amateur band or ISM band, control transmitting power definitely, thereby can satisfy wireless control requirement, use to need not licence; 2. volume is small and exquisite, and is with low cost, easy to carry, easy to use, sound clarity; 3. two-way communication, select frequency automatically, according to ID number independent flexible automatic networking need not Monthly Fee and call rate, also can not clash with other tourist groups; 4. make things convenient for the visitor, be convenient to communicating by letter between the visitor of visitor and guide and acquaintanceship; And the visitor can select to listen or do not listen when the guide introduces the sight spot.5. effective communication distance is longer, reaches more than the 400m, and convenient guide is convenient to guide's tissue and is got in touch the visitor, and the visitor also can get in touch conversation with the guide, raises the efficiency greatly; Simultaneously, voice module is arranged, when introducing the sight spot, can play fixing recording, play sight spot introduction and music etc., remove the introduction of the formula of reciting day by day from by communication, the guide only need do some simply additional getting final product where necessary, can be more energy flowers in prior place.Removed the constraint of guide's hand microphone from, better brought into play the gesture guiding and introduce.6. can save the communication cost between the visitor in the tourism process, especially more obvious when travel abroad; 7. help the peace and quiet that keep the sight spot relative, avoid too noisy situation, make the visitor obtain satisfied tourism effect.8. be convenient to travel agency and unify service standard, improve excellent service standard.

Be connected powerful auxiliary radio circuit with first integrated circuit chip programmable at first integrated circuit chip programmable, can be in emergency circumstances special at some, as searching and rescuing, when getting into danger, passing through diverter switch, increase the transmitting power of emitter, increase the contact distance.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment one;

Fig. 2 is the structural representation of the emitter of the utility model embodiment one;

Fig. 3 is the structural representation of the receiving system of the utility model embodiment one;

Fig. 4 is the peripheral interface circuit of C8051F020 chip;

Fig. 5 is the peripheral interface circuit of C8051F330 chip;

Fig. 6 is the peripheral interface circuit of NRF905 chip;

Fig. 7 is an audio amplifier circuit of the present utility model;

Fig. 8 is a low-pass filter circuit of the present utility model;

Fig. 9 is a frequency point setting button part of the present utility model.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Embodiment one: a kind of guide's communication device, comprise an emitter 1 and a plurality of receiving system 2, emitter 1 comprises that model is first integrated circuit chip programmable of C8051F020, the C8051F020 chip is connected with the first radio circuit chip that low-pass filter circuit 11 and audio amplifier circuit 12 and model are NRF905, low-pass filter circuit 11 is connected with microphone 13, audio amplifier circuit 12 is connected with earphone 14, the NRF905 chip is provided with first antenna 15, receiving system 2 comprises that model is second integrated circuit chip programmable of C8051F330, the C8051F330 chip is connected with the second radio circuit chip and the audio amplifier circuit 21 that model is NRF905, the NRF905 chip is provided with second antenna 22, audio amplifier circuit 21 is connected with earphone 23, the C8051F330 chip also is connected with microphone 24 and speech processes low-pass filter circuit 25, the signal that microphone 13 sends carries out speech signal collection by the analog to digital conversion circuit of C8051F020 chip, send radio wave signal by first antenna 15 that is provided with on the NRF905 chip, the radio wave signal that the analog to digital conversion circuit of C8051F330 chip will be received by second antenna 22 of NRF905 chip setting converts analog signal to, output to earphone 23 by audio amplifier circuit 21 again, the C8051F020 chip is connected with frequency point setting button K, the end ground connection of frequency point setting button K, the other end of frequency point setting button K is connected with power supply VCC by first resistance R 1, the other end of frequency point setting button K links to each other with the IO port P3.0 of C8051F020 chip simultaneously, when frequency point setting button K disconnects, P3.0 is a high level, P3.0 is a low level during frequency point setting button K conducting, the frequency configuration register of NRF905 chip is preset with 10 frequency frequency data, per 10 seconds frequencies of C8051F020 chip by SPI interface configuration NRF905, and the frequency transmission frequency detection packet that is being provided with, idle frequency point data leaves among the FLASH ROM of C8051F020 chip, be set on the idle frequency by the frequency of common frequency band with the NRF905 chip of receiving system 2 then, the C8051F020 chip is connected with liquid crystal indicator 16 and speech play module 17.

The key technical indexes of present embodiment is

A frequency: ISM band;

The B stability :+/-20PPM;

C operating temperature range :-20C～+ 50C;

D modulation system: GFSK;

E transmits and receives local oscillator working method: PLL;

F transmitting power:＜300mW;

G system frequency response: undetermined;

H system signal noise ratio: 60dBc;

I operating voltage: 3.3V;

J operating current:＜20mA;

The L distortion factor:＜3%;

M sensitivity:＜-105dbm

N selectivity:＞130dbc

Embodiment two: (figure does not show) first integrated circuit chip programmable is connected with the powerful first auxiliary radio circuit, the first auxiliary radio circuit is connected with first antenna 15, be provided with first diverter switch between the first auxiliary radio circuit and the first radio circuit chip, second integrated circuit chip programmable is connected with the powerful second auxiliary radio circuit, the second auxiliary radio circuit is connected with second antenna 22, is provided with second diverter switch between the second auxiliary radio circuit and the second radio circuit chip.

The means of communication of the guide's communication device in the foregoing description realize by following manner: the receiving system 2 that an emitter 1 that is connected and composed by C8051F020 chip and low-pass filter circuit 11 and audio amplifier circuit 12 and NRF905 chip is set and is connected and composed by C8051F330 chip and NRF905 chip and audio amplifier circuit 21, connect microphone 13 at low-pass filter circuit 11, connect earphone 14 at audio amplifier circuit 12, first antenna 15 is set on the NRF905 chip, at the NRF905 of receiving system 2 chip second antenna 22 is set, connect earphone 23 at audio amplifier circuit 21, the signal that microphone 13 sends carries out speech signal collection by the analog to digital conversion circuit of C8051F020 chip, send radio wave signal by first antenna 15 that is provided with on the NRF905 chip, the radio wave signal that the analog to digital conversion circuit of C8051F330 chip will be received by second antenna 22 of NRF905 chip setting converts analog signal to, output to earphone 23 by audio amplifier circuit 21 again, the C8051F020 chip is connected with frequency point setting button K, the end ground connection of frequency point setting button K, the other end of frequency point setting button K is connected with power supply VCC by first resistance R 1, the other end of frequency point setting button K links to each other with the IO port P3.0 of C8051F020 chip simultaneously, at default 10 the frequency frequency data of the frequency configuration register of the NRF905 of emitter 1 chip, conducting frequency point setting button K, when making P3.0 be low level, per 10 seconds frequencies of C8051F020 chip by SPI interface configuration NRF905, and the frequency transmission frequency detection packet that is being provided with, the idle frequency point data that detects is left among the FLASH ROM of C8051F020 chip, be set on the idle frequency by the frequency of common frequency band then the NRF905 chip of receiving system 2.Disconnect at frequency point setting button K, when making P3.0 be high level, carried out a frequency every 5 minutes and select.

Native system is made up of receiving system (terminal) and emitter (center), reliability and maintainability from system, and in conjunction with client's actual demand, the similar techniques scheme is adopted at the terminal of native system and center, adopt the structure of MCU+NRF radio frequency chip, just the center is with better function, and interface is more.

In this programme, employing C8051F330 is CPU, utilizes its 10bitADC and 10bitDAC, and voice pass through the Microphone conversion, low pass filter filtering, and speech signal collection is carried out in the ADC conversion of CPU, sends by NRF905.CPU is converted to analog signal with the voice digital signal that NRF905 receives by DAC, by audio amplifier circuit, and the output of lug plug.

The NRF905 chip is the monolithic radio frequency transceiver that Norway Nordic VLSI company releases, operating voltage is 1.9～3.6V, 32 pin QFN encapsulation (5 * 5mm), work in three ISM of 433/868/915MHz (industry, science and medical science) channel, the change-over time between the channel is less than 650us.NRF905 is made up of frequency synthesizer, receiving demodulation device, power amplifier, crystal oscillator and modulator, need not add Surface Acoustic Wave Filter, the ShockBurstTM mode of operation, automatically handle prefix and CRC (CRC), use SPI interface and single chip communication, dispose very convenient.In addition, its power consumption is very low, and electric current has only 11mA during with the power output emission of-10dBm, and the electric current when working in receiving mode is 12.5mA, and built-in idle pulley and shutdown mode are easy to realize energy-conservation.

C8051F330 chip inner height is integrated needed nearly all simulation of acquisition and control system and digital peripherals: ADC, programmable gain amplifier, DAC, voltage comparator, voltage reference, temperature sensor, SMBus/I2C, UART, SPI, PCA (band comparison/capture module PCA, can realize seizure, software timing, export at a high speed, PWM), Flash memory, nonvolatile memory, SRAM, WDT, VDD monitor etc.

For guaranteeing tonequality, in sound circuit, can use 7 rank Butterworth low pass filters, cut-off frequency is 4Khz (telephone set tonequality is 8K), sample frequency 16Khz.

The high bit rate of NRF905 is 76.8kbps, considers duplex communication, and data need send to NRF905 by single-chip microcomputer, so per second transmits 3840 byte datas at most.Even use the ADC of 8-bits, the data of each second also reach 16000 bytes, therefore, for guaranteeing voice quality, must use compress speech.The compress speech of native system adopts the CVSD algorithm.It is to improve on basic DPCM algorithm that Continuously Variable Slope Delta (CVSD) continues the variable slope voice compression algorithm, and it changes the value that speed is adjusted delta according to the amplitude of input signal.When change increasing, the value of delta also increases, like this, can more accurate tracking primary signal, have compression effectiveness preferably.

The scheme at center and terminal more approaching, but increased by 4 functional modules such as button input interface, LCD display interface, memory interface and speech play module.Because the function at center is stronger, need more FLASH, RAM and IO mouth, so single-chip microcomputer change into C8051F330 with a series of C8051F020.

Be to guarantee the reliability of button, button can be done anti-shake processing (when having detected the button input, detect once every 10mS in the time at 100mS, continuous judge that button is effective when having detected button 4 times and pressing).

Liquid crystal adopts parallel port 122*32 lattice lcd, and the data pin among the figure on the LCD interface, control pin all link to each other with the IO pin of C8051F020, are driven by C8051F020.

Memory refers to EEPROM AT24C64 here, is used for the address information of all slaves of storage host control.

Have the sector of 128 additional bytes to be positioned at 0x8000-0x807F in the FLASH memory of MCU, this sector can be used for program code stored or data, yet its less sector capacity is particularly suited for as general non-volatile temporary storage it.Although the FLASH memory can be write a byte at every turn, must at first wipe whole sector.In order to revise some bytes that a multibyte data is concentrated, whole data set must be saved to a scratchpad area (SPA), next with sector erasing, update data set, at last data set is write back to former sector, the sector size of 128 bytes is more prone to Data Update, can use internal data RAM not waste program memory space as the scratchpad area (SPA).

The FLASH of 0x8000-0x807F sector is used for storing relevant configuration information (this machine address, destination address etc.)

Native system adopts the compress mode of MP3 format as the speech play module.The content of speech play in advance by downloaded to the FLASH at center.The introduction at each sight spot is as an independent mp3 file storage.

Behind certain sight spot, the guide accesses corresponding mp3 file by button operation, and this operation demonstrates the result by LCD.

Main frame carries out the preparation that receives voice in the group all slave transmission information notice slaves by broadcast address in organizing, and main frame is the reduction voice messaging that decompresses by MP3 of reading of mp3 file then, and sends to all slaves by NRF905.

The compression of MP3 is finished by computer professional software, what control centre need handle is the decompression part, for improving cost performance, this part is finished (MP3 decode has source code on the net, and we need be transplanted to these codes on our the employed single-chip microcomputer) by single-chip microcomputer C8051F020 with software code.If do not consider cost, can finish with MP3 decode chip.

K9F2808U0B Flash introduces: 16M * 8Bit NAND Flash memory, and have 512 * 8BitSRAM.

All configuration words all are to give NRF905 by the SPI interface.The working method of SIP interface can be provided with by configuration register.When NRF905 was in idle pulley or shutdown mode, the SPI interface can remain on operating state.

The SPI interface is made up of status register, radio-frequency configuration register, transmission address register, transmitting data register and 5 registers of receive data register.Status register comprises DSR pin state information and matching addresses pin state information; The radio-frequency configuration register comprises transceiver configuration information, as frequency and output function etc.; Send address register and comprise the address of receiver and the byte number of data; Transmitting data register comprises the information of packet to be sent, as byte number etc.; Receive data register comprises the information such as byte number of the data that will receive.

Every length of radio frequency register is fixed.Yet in ShockBurstTM transmitting-receiving process, TX_PAYLOAD, RX_PAYLOAD, TX_ADDRESS and 4 registers of RX_ADDRESS use byte number to be determined by configuration words.When NRF905 entered shutdown mode or idle pulley, the content in the register remained unchanged.

In this programme, adopt the pattern of principal and subordinate's machine, a main frame maximum can be managed 253 slaves.

All kinds of addresses all are made up of 4 bytes, the mode of similar TCP/IP address is adopted in the address, and form is as 255.255.255.255, front 3 bytes are represented group number, last byte is represented the numbering of this machine in group, and under the default situations: 00 expression host address, FF represents broadcast address.4 byte-identifiers go out the unique address of each equipment.Under this address pattern, maximum 1,600 ten thousand groups of logical equipment of trip, 4,200,000,000 terminals of allowing.Wherein 255.255.255 is the group address that system keeps.

The 0x8070-0x8073 sector of single-chip microcomputer is deposited in the processing of slave addresses, the address of slave self, and host address is deposited in the 0x8075-0x8078 sector, and broadcast address is deposited in 0x807A～0x807D in the group.

The processing of host address, AT24C64 is deposited in the address of main frame, and the address is 0x000～0x003, and each slave addresses is deposited in 0x100～0x300.Broadcast address is deposited in 0x005～0x008 in the group.

Above address, the address of host and slave processors is configured by user software.

In this programme,, to be thought of as principal and subordinate's machine for this reason and distribute specific frequency owing to will consider to have simultaneously the possibility of a plurality of tourist groups appearance.The setting of frequency is by realizing NRF905 frequency configuration operation registers.The bandwidth of each channel of NRF905 is 200KHz, and allows 10 frequencies of configuration at most.Consider power consumption considerations, the selection of frequency is finished by main frame.The single-chip microcomputer of host A is the free time, and carry out frequency in two ways and select: 1, regularly initiate (every 5 minutes); 2, when frequency is selected that button is set and is pressed.When carrying out the frequency selection, the every 10S of C8051F020 is by the frequency of SPI interface configuration NRF905, and the frequency transmission frequency detection packet that is being provided with.

If function code 0x5555 in the response packet, expression host B are using this frequency, please continue other frequencies of detecting by host A.If after function code 0x5550 in the response packet, expression host B also at this frequency of detecting, receive the packet of host A, withdraw from detecting, promptly embody the principle of " proposing approval earlier earlier " to this frequency.

If host A is not received the response packet of other main frames in 4S, promptly judge this frequency free time, can use.If the response packet function code that host A is received in 2S all is 0x5550, then also judge this frequency free time, can use.Otherwise this frequency is occupied, needs to continue the detecting of next frequency.

After host A detects idle frequency, frequency point data is stored among the FLASH ROM, by common frequency band corresponding slave is set on the idle frequency that detects then.

In a frequency selection cycle, single-chip microcomputer is provided with from low to high to the frequency of NRF905, carries out the setting of 10 frequencies at most.

In the system design, all centers and terminal all are being on the public frequency after the start, and the frequency of terminal is selected complete acceptor center control.

The processing of principal and subordinate's machine communication

Principal and subordinate's machine communication proper communication must be satisfied two conditions:

One, principal and subordinate's machine is all at identical frequency range and channel;

Two, principal and subordinate's machine all has identical group number;

Give one example: the address of main frame: the address of 10.10.10.00 slave: 10.10.10.80 broadcast address: 10.10.10.255.Main frame and slave all are arranged on the 433.1MHz frequency.Main frame and slave status in the process of initiating conversation is an equality, and promptly conversation can both be initiated or reply to principal and subordinate's machine in an identical manner.

Typical main frame transmission flow divides following several steps:

A. when single-chip microcomputer has data to send, by the SPI interface, the address of receiver is sent with the data that will send passed to NRF905 chronologically, the speed of SPI interface is determined when communication protocol and cell configuration;

B. single-chip microcomputer is put high TRX_CE and TX_EN, excites the ShockBurstTM sending mode of NRF905;

The ShockBurstTM of C.NRF905 sends:

1 radio frequency register is opened automatically;

1 packing data (adding prefix and CRC check sign indicating number);

1 sends packet;

1 works as data is sent completely, and the DSR pin is put height;

D.AUTO_RETRAN is put height, and NRF905 constantly retransmits, and is put low up to TRX_CE;

E. put lowly as TRX_CE, the NRF905 process of transmitting is finished, and enters idle pulley automatically.

The ShockBurstTM mode of operation guarantees, begins in case send the process of data, and no matter TRX_CE and TX_EN pin are high or low, and process of transmitting all can processedly finish.Only be sent out at previous packet and finish, NRF905 could accept the next packet that sends.

Slave carries out following operation under idle condition:

A. when TRX_CE be high, TX_EN when low, NRF905 enters the ShockBurstTM receiving mode;

B.650us after, NRF905 constantly monitors, and waits for receiving data;

C. when NRF905 detected the carrier wave of same frequency range, carrier wave detected pin and is put height;

D. ought receive an address that is complementary, the matching addresses pin is put height;

E. work as a correct packet and receive, NRF905 removes prefix, address and CRC check position automatically, then the DSR pin is put height

F. single-chip microcomputer is put TRX_CE low, and NRF905 enters idle pulley;

G. single-chip microcomputer moves on to data in the single-chip microcomputer with certain speed by the SPI mouth;

H. work as all Data Receiving and finish, NRF905 puts DSR pin and matching addresses pin low;

I.NRF905 can enter ShockBurstTM receiving mode, ShockBurstTM sending mode or shutdown mode this moment.

When receiving a packet, the state of TRX_CE or TX_EN pin changes, and NRF905 changes its mode of operation immediately, and packet is then lost.After microprocessor was received the signal of matching addresses pin, it just knew that NRF905 is receiving packet, and it can determine to allow NRF905 continue to receive this packet or enter another mode of operation.

In same network, all slave receiver addresses all are configured to host address.Can guarantee the data stabilization of same each and every one network like this, the problem that does not have host address to judge simultaneously in packet can improve efficiency of transmission.

Claims (6)

1, a kind of guide's communication device, comprise an emitter and a plurality of receiving system, it is characterized in that described emitter comprises first integrated circuit chip programmable, described first integrated circuit chip programmable is connected with the signal generating circuit and the first radio circuit chip, the described first radio circuit chip is provided with first antenna, described receiving system comprises second integrated circuit chip programmable, described second integrated circuit chip programmable is connected with second radio circuit chip and the audio amplifier circuit, the described second radio circuit chip is provided with second antenna, described audio amplifier circuit is connected with earphone, the signal that described signal generating circuit sends carries out speech signal collection by the analog to digital conversion circuit of described first integrated circuit chip programmable, by the described first antenna transmission radio wave signal that is provided with on the described first radio circuit chip, the radio wave signal that the analog to digital conversion circuit of described second integrated circuit chip programmable will be received by second antenna of the described second radio circuit chip setting converts analog signal to, output to described earphone by described audio amplifier circuit again, described emitter is provided with frequency and selects set mechanism.

2, a kind of guide's communication device as claimed in claim 1, it is characterized in that described frequency selection set mechanism comprises the frequency configuration register that is arranged in the described first radio circuit chip, be preset with a plurality of frequency frequency data in the described frequency configuration register, described first integrated circuit chip programmable is connected with the frequency point setting button, described first integrated circuit chip programmable is provided with the frequency of the described first radio circuit chip by special purpose interface, and, be provided with the register of depositing idle frequency in described first integrated circuit chip programmable at the frequency transmission frequency detection packet that is provided with.

3, a kind of guide's communication device as claimed in claim 2, it is characterized in that described first integrated circuit chip programmable is the C8051F020 chip, described second integrated circuit chip programmable is the C8051F330 chip, described first radio circuit chip and the described second radio circuit chip are the NRF905 chip, frequency configuration register in the described first radio circuit chip is preset with 10 frequency frequency data, one end ground connection of described frequency point setting button, the other end of described frequency point setting button is connected with power supply by first resistance, the other end of described frequency point setting button links to each other with the IO port P3.0 of described C8051F020 chip simultaneously, when described frequency point setting button disconnects, P3.0 is a high level, P3.0 is a low level during described frequency point setting button conducting, per 10 seconds frequencies of described C8051F020 chip by SPI interface configuration NRF905, and the frequency transmission frequency detection packet that is being provided with, described idle frequency point data leaves among the FLASH ROM of described C8051F020 chip, and the frequency of the described second radio circuit chip is set on the described idle frequency.

4, a kind of guide's communication device as claimed in claim 1, it is characterized in that described first integrated circuit chip programmable is connected with liquid crystal indicator and speech play module, described second integrated circuit chip programmable is connected with microphone and speech processes low-pass filter circuit.

5, a kind of guide's communication device as claimed in claim 1 is characterized in that described signal generating circuit comprises low-pass filter circuit and audio amplifier circuit, and described low-pass filter circuit is connected with microphone, and described audio amplifier circuit is connected with earphone.

6, a kind of guide's communication device as claimed in claim 1, it is characterized in that described first integrated circuit chip programmable is connected with the powerful first auxiliary radio circuit, the described first auxiliary radio circuit is connected with described first antenna, be provided with first diverter switch between the described first auxiliary radio circuit and the described first radio circuit chip, described second integrated circuit chip programmable is connected with the powerful second auxiliary radio circuit, the described second auxiliary radio circuit is connected with described second antenna, is provided with second diverter switch between the described second auxiliary radio circuit and the described second radio circuit chip.

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