CN104104460B - Wireless interphone intelligent control broadcasting system having fingerprint identification function - Google Patents

Abstract

The invention discloses a wireless walkie-talkie intelligent control broadcasting system with a fingerprint recognition function. The system includes a transmitting device and a receiving device. Through the invention, the user does not need to replace the existing equipment in the broadcasting machine room, and only needs to use the wireless walkie-talkie as an emergency The start-up receiving device is connected to the power supply, preamplifier and speakers of the broadcasting machine room, and after the fingerprint identification authentication has the use authority, the start and stop of the broadcasting machine room can be directly controlled through the man-machine interface and the voice signal can be transmitted to the preset broadcasting zone. This system can identify user fingerprints, identify the authenticity of the holder, and has high confidentiality. It is economical and simple to implement, and the response time is less than 3s. effect.

Description

Wireless walkie-talkie intelligent control broadcasting system with fingerprint recognition

technical field

The invention relates to fingerprint identification technology, radio technology and microcomputer control technology, and is suitable for occasions where the broadcasting needs to be quickly started and the accident message is played to notify crowds to evacuate under emergency situations at the grassroots level such as schools, wharves and small and medium-sized enterprises.

Background technique

In recent years, natural disasters, public health, and production safety accidents have occurred frequently in our country. For example, the 11.5 commercial building fire accident in Jilin City in 2010 caused 19 deaths, 31 injuries, and a direct economic loss of more than 50 million yuan. Therefore, the rapid response and timely release of emergency and disaster events are becoming more and more important. In the social public security system, the emergency command and communication system is an important link and basic guarantee of the emergency management system, and an important symbol reflecting the participation of civil air defense departments in urban crisis management.

The emergency command and communication vehicle plays a key role in the response to emergencies by virtue of its advantages of flexible movement and quick deployment. The commander on the emergency communication vehicle or the staff on the emergency site can realize individual calls (single call), group (group) call, all call (simulcast) and multi-party calls to users in different emergency communication networks through the emergency command communication vehicle Simultaneous calls; calls have priority levels, which can be divided into several levels according to emergency needs and user conditions in the system. The image, voice and data captured by the camera on the scene are transmitted to the remote command center through the remote transmitting and receiving system on the emergency command vehicle. Therefore, a reliable communication connection between the emergency command communication vehicle and the remote command center is required, and the emergency command vehicle can remotely Access to various public and private networks, such as PSTN, Intenet, Intranet, etc. However, the traditional emergency command vehicle cannot effectively organize personnel to quickly evacuate and save themselves in the first place, and the cost of use is high and requires special maintenance. Therefore, people urgently hope to find a wide range of useful equipment to quickly form an emergency system. It can broadcast emergency news in time to reduce the harm to personal safety.

The wireless walkie-talkie has the characteristics of one-to-many communication mode, economical and practical, group call broadcast, etc., and has become an irreplaceable cluster communication terminal equipment and professional wireless communication tool in dispatching and commanding. The existing wireless walkie-talkie is converted from analog to digital, and has the function of voice transmission and data transmission. On this basis, the walkie-talkie can send and receive short messages with each other. Under normal circumstances, the two perform their own duties, and in an emergency, they can reorganize resources, which will greatly save economic costs and improve the efficiency of rescue work, which is of obvious public interest. Due to the uniqueness of fingerprint information, fingerprint identification technology has been widely used in civil fields such as time attendance, access control, fingerprint lock, Windows login, computer information security and password banking.

However, the existing walkie-talkies have poor confidentiality. Any holder only needs to press the PTT button to realize the intercom. Even the walkie-talkies with the function of setting passwords cannot guarantee that the holder has the right to use them. Therefore, it is prone to confusion in the use of walkie-talkies.

Contents of the invention

In view of this, the technical problem to be solved by the present invention is to provide a wireless walkie-talkie intelligent control broadcasting system with fingerprint recognition function, which overcomes the shortcomings of traditional solutions requiring manual on-duty and high maintenance costs, and enables staff to use the walkie-talkie in their hands at the accident site Quickly open the existing broadcasting room equipment and broadcast emergency news in time, and avoid the situation where illegal holders open the broadcasting system without reason and cause confusion among the crowd.

The technical solution adopted by the present invention to solve its technical problems:

A wireless walkie-talkie intelligent control broadcasting system with fingerprint identification is characterized in that it includes a wireless walkie-talkie receiving device and a wireless walkie-talkie transmitting device with fingerprint recognition.

The wireless intercom transmitting device is characterized in that the device includes a fingerprint identification module, a microcontroller, a wireless intercom module, a MAX232 circuit, a power amplifier circuit, a buzzer alarm circuit, buttons and a liquid crystal display circuit and comes with 3.3V and 5V lithium battery.

In order to facilitate the downloading and debugging of the program, the MAX232 circuit sends instructions through the PC to input the fingerprint information of all staff members into the flash library.

The fingerprint identification module is used to collect the fingerprint of the walkie-talkie holder, search the flash library and compare and verify with the fingerprint information of all staff who have entered the walkie-talkie in advance, and finally return to the microcontroller through the serial interface. Contains data of fingerprint feature values and fingerprint templates.

The buttons and the liquid crystal display circuit are used to provide the user with a visual interface to display the user's fingerprint ID number, and to choose the broadcast partition of the emergency message to avoid unnecessary panic. After the user button is set, the current status can be observed through the LCD. The equipment in the broadcasting room is in the state of "on" or "off".

The microcontroller is used to identify the fingerprint data received by the serial port 2 to authenticate the use authority of the holder. If the user has the use authority, the relay is driven to power on the wireless intercom module, otherwise the buzzer is controlled to alarm. At the same time, send control instructions and set the voice volume, and pass the control instructions and fingerprint ID numbers corresponding to the information set by the user to the asynchronous serial interface receiving end of the wireless intercom module through the serial port 3 sending end.

The buzzer alarm circuit is used to receive a low-level signal from the microcontroller to give an alarm when the microcontroller judges that the owner of the walkie-talkie does not have the right to use the walkie-talkie.

The wireless intercom module is used to send the fingerprint ID number, the emergency voice signal input by the microphone, and the control command in the form of wireless signals through the antenna, and at the same time, transmit the feedback response signal of the receiver to the microcomputer through the asynchronous serial interface sending end. controller.

The power amplifier module can perform voice control, filtering and power amplification on the voice signal fed back by the receiver. Voice signals can only be transmitted when the enable terminal of the power amplifier module is at a low level.

The wireless intercom receiving device is characterized in that the device includes a microcontroller, a wireless intercom module, a MAX232 circuit, a power amplifier circuit, a relay drive circuit and a power supply circuit.

The wireless intercom module is used to receive wireless signals and convert the wireless signals into voice signals and data commands. At the same time, the received voice signals are transmitted to the power amplifier through the voice output port, and the data commands and fingerprint ID numbers The line interface sender transmits to the microcontroller.

The micro-controller is used to identify and extract the received data instructions, and its asynchronous serial port interface receiving end and sending end are respectively connected with the sending end and receiving end of the wireless walkie-talkie receiving module. According to the serial communication protocol formulated by the software, the micro-controller The data frame between the device and the wireless intercom module is transmitted in a fixed format. When the microcontroller is interrupted serially, it can judge whether the received data meets the agreed format before receiving and storing it in sequence, extracting effective control instructions and translating them into the connection relay. Parallel port I/O level status.

The MAX232 circuit is for the convenience of downloading and debugging of the program, and the wireless intercom receiving device communicates with the upper computer on the spot, and can regularly transmit the received data containing fingerprint information sent from the sender.

The power amplifier circuit has the functions of voice control start and stop, voice filtering and power amplification, and transmits the amplified voice signal to the fire-fighting strong cut interface of the preamplifier in the broadcasting machine room, and then inputs it to the speaker for external playback.

The relay driving circuit is used to connect the equipment in the broadcasting machine room, mainly including a driving circuit and nine signal relays, wherein one signal relay is connected to the 24V fire-fighting forced power supply of the preamplifier through a power line, and the other eight signal relays are connected to the broadcasting machine room through an audio cable Partition speakers.

The source conversion module of the power conversion circuit mainly includes voltage conversion chips 7812, 7805 and AS1117AR-3.3 to convert the 24V external fire-fighting forced power supply into two voltage levels of 3.3V and 5V. Among them, the 5V power supply is used for the microcontroller and the intercom module on the receiving device, and the 3.3V voltage is used for the peripheral circuits. If the wireless walkie-talkie module is in the continuous receiving mode, its working power is 1W, and when there is no strong enough voice signal input, the receiving module is in the squelch standby power-saving mode, and the power circuit mainly supplies power for the microcontroller.

The technical idea of the present invention is: the core part of the system adopts the STM32F103CB chip of Hongjing Technology Co., Ltd., and the control part mainly includes a fingerprint identification module, a wireless walkie-talkie module and a relay driving circuit. Before the system runs, the sender, the 3.3V power supply is connected to the wireless intercom module through a solid state relay, the serial interface of the fingerprint recognition module is connected to the serial port 2 of the microcontroller, and the serial interface of the wireless intercom module is connected to the serial port of the microcontroller. 3 connected, the microcontroller on the sending side is provided with four buttons on the periphery; on the receiving side, the voice signal output of the walkie-talkie is input to the fire protection interface of the preamplifier through the microphone line, and the I/O port PA11 of the microcontroller passes through a The relay is connected to the 24V fire-fighting forced power supply of the preamplifier, the PB0-PB7 output port is connected to the relay drive circuit, and the audio cable is used to connect the signal relay at the receiving device end to the speakers of each partition, and the staff should record and save all available information in advance. The fingerprint of the walkie-talkie is updated regularly. When the system starts to run, turn on the power switch of the transmitting device. At this time, the LCD will display the initialization interface. Press button 1 to enter the main menu of the LCD screen. The system defaults to the fingerprint recognition mode. Take the user's fingerprint data and transmit the fingerprint data to the microcontroller. The microcontroller judges whether the user has the right to use according to the received fingerprint data. If the holder is an illegal user, the buzzer alarm circuit sends out an alarm signal. The user cannot use the walkie-talkie; if the holder is a legitimate user, the LCD screen displays the ID number of the fingerprint number, the microcontroller outputs a control signal to turn on the solid-state relay, powers up the wireless intercom module, the diode lights up, and the walkie-talkie is ready start working. Press button 1 again to enter the remote status mode, switch button 2 to each partition subtitle to set the conduction state of the eight-channel broadcast partition speakers, press button 3 once and the subtitles will change from off to on, press button 4 The next time the transmission is confirmed, the relays connecting the output port of the preamplifier to the preset zone speakers will act. At the end of the button operation, press PTT, the level of PA11 is set low, and the 24V power supply of the preamplifier is switched on. At this time, the currently playing voice signal from other channels is cut off, and the user starts talking into the microphone. The light-emitting diode in the receiving device starts to flash, and the preset zone speakers start to play the user's voice signal. On the contrary, release the PTT button, the signal relay that controls the fire emergency cut-off interface is disconnected, the emergency channel is closed, and the voice signal before the broadcast resumes continues to play.

The beneficial results of the present invention are: the adopted components are simple and practical, highly integrated, and reliable, breaking the communication mode of the traditional walkie-talkie without a password or setting a password, and using the fingerprint identification mode to authenticate the use authority, preventing illegal users from Open the broadcasting machine room at will to release bad information, which greatly improves the confidentiality and security of the system; solves the problem of short communication distance caused by the traditional intelligent broadcasting system relying solely on the PC host to control the broadcasting equipment through the controller, and provides a new, The effective and convenient real-time release of emergency messages has broad application prospects in the security field.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is a structural block diagram of the wireless walkie-talkie transmitting device of the present invention;

Fig. 3 is a structural block diagram of the wireless walkie-talkie receiving device of the present invention;

Fig. 4 is the schematic diagram of microcontroller control part of the present invention;

Fig. 5 is a schematic diagram of the relay driving circuit of the present invention;

Fig. 6 is the working flow chart of wireless walkie-talkie transmitting device of the present invention;

Fig. 7 is the working flow diagram of the wireless walkie-talkie receiving device of the present invention;

Fig. 8 is the serial communication protocol form between the microcontroller of the present invention and the wireless walkie-talkie module;

In the figure, 1. wireless walkie-talkie transmitter, 2. wireless walkie-talkie receiver, 11. battery power supply, 12. fingerprint recognition module, 13. microcontroller, 14. MAX232 circuit, 15. button circuit, 16. liquid crystal display circuit, 17. Alarm, 18. Power amplifier circuit, 19. Wireless intercom module, 21. Relay drive circuit, 22. MAX232 circuit, 23. Microcontroller, 24. Power circuit, 25. Wireless intercom module, 26. Power amplifier circuit .

detailed description

The scheme of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to shown in accompanying drawing 1, a kind of wireless walkie-talkie emergency starting control system with fingerprint identification is characterized in that: comprise wireless walkie-talkie receiver and wireless walkie-talkie transmitter. The wireless intercom transmitting device has a fingerprint identification function, and the intercom module can be activated for voice and data transmission only when the current holder has the right to use the authentication.

Referring to accompanying drawing 2, described wireless walkie-talkie transmitting device 1 mainly comprises fingerprint identification module 12, microcontroller 13, MAX232 circuit 14, wireless intercom module 19, power amplifier circuit 18, buzzer alarm circuit 17, button circuit 15, liquid crystal The display circuit 16 also has a 3.3V and 5V lithium battery 11. The button circuit 15 and the liquid crystal display circuit 16 are used to provide a man-machine interface to facilitate fingerprint identification and display user fingerprint ID numbers according to different modes and select power and broadcast partitions by pressing the button. 1. Extract the fingerprint information sent and perform identity authentication on the current user based on this information. If you have the right to use, turn on the solid state relay and connect the 3.3V power supply to supply power to the wireless intercom module 19. The microcontroller 13 converts the control command sent by the key The transmission format of the specific data instruction is sent to the wireless intercom module 19 through the sending end of the asynchronous serial interface 2, and the wireless intercom module 19 works in half-duplex mode, and the received data is wirelessly transmitted through the antenna on the device. After the voice signal is sent out, it starts to receive the voice signal input by the microphone, and encrypts the voice signal to remove noise and eliminate the tail sound, and also transmits it wirelessly through the antenna, and can also decode the voice signal sent by other walkie-talkies. The power amplifier circuit 18 Play the decoded voice signal after volume control, filtering, front-end amplification and power amplification.

Referring to FIG. 3 , the wireless walkie-talkie receiving device 2 mainly includes a microcontroller 23 , a wireless walkie-talkie module 25 , a MAX232 circuit 22 , a relay drive circuit 21 , a power amplifier circuit 26 and a power supply circuit 24 . The power supply circuit 24 provides 3.3V voltage to the microcontroller 23 and the wireless intercom module 25, and 5V voltage to other peripheral circuits. The wireless walkie-talkie receiving module 25 converts the wireless signal received from the antenna into a voice signal or a data command, decodes the voice signal and outputs it to the power amplifier circuit 26, and sends the data command serially to the microcontroller 23, and the microcontroller 23 transmits the data again. The command is converted into the level of the parallel I/O port connected to the relay, and then the relay is driven to start the 24V fire-fighting forced cut-off power supply and the eight-way broadcast partition. Afterwards, the power amplifier circuit performs a series of processing such as filtering and amplifying the input voice signal, and then input it to the fire protection interface of the preamplifier and play it through the user-preset partition speakers to ensure that the emergency voice channel has the highest priority.

Referring to accompanying drawing 4, the core circuit of the whole control system is as follows: the serial interface 1 of the microcontroller U1 is cross-connected with the serial port of the MAX232 chip, the serial interface 2 is cross-connected with the serial interface of the fingerprint recognition module, and the microcontroller U1 The serial interface 2 of the microcontroller U1 is cross-connected with the serial interface of the wireless intercom module U3, the port 29 of the microcontroller U1 is connected with the enabling terminal of the power amplifier chip, and the port 15 of the microcontroller U1 is connected with the pin 5 of the wireless intercom module, that is, PTT The buttons are connected, pin 1 and pin 5 of P1 are short-circuited, and the voice output port 3 of the input wireless walkie-talkie module U3 is connected to the voice input port of the power amplifier chip, and USART2_TX and USART2_RX in P2 are connected to the serial port of the fingerprint recognition module. The model of the identification module is FM-180, the model of the chip U1 is STM32F103CB, and the model of the module U3 is HKT-80BK. The FM-180 and HKT-80BK modules are existing mature technologies, and their internal structures will not be described in detail.

Referring to accompanying drawing 5, the relay driving circuit on the wireless walkie-talkie receiving device 2 is as follows: the ports 2-9 of the chip U5 are connected with the PB0-PB7 output ports of the microcontroller U1 in the accompanying drawing 4, the model of the chip U5 is SN74LS540N, and the chip U6 The model of the relay is ULN2803A, and the model of the signal relay is HRS1H-S-DC5V. This circuit is used to execute the control command of the transmitting device 1, and achieve the gating of the speaker partition through the on and off of the relay. Among them, the chip U5 can effectively avoid power-on misoperation, and the high-voltage and high-current Darlington transistor U6 can ensure timely and reliable drive signal relay.

Referring to shown in accompanying drawing 8, the serial communication protocol between the microcontroller of the present invention and the wireless walkie-talkie module is: a complete instruction format is AT+DMOMES=[Message Lenth] 0D0A, and the length is 17 bytes, and the actual sending The data of is the hexadecimal number corresponding to its ASCII code. When the wireless walkie-talkie transmitter communicates with other walkie-talkies as a portable walkie-talkie, the receiver number can be set through the target ID number.

The technical idea of the present invention is: the core part of the system adopts the STM32F103CB chip of Hongjing Technology Co., Ltd. to control the fingerprint identification module 12, the wireless walkie-talkie modules 19, 25 and the relay drive circuit 21. Before the system runs, on the sender side, short-circuit the pin 1 and pin 5 of the pin header P1 with a cable, so that the 3.3V power supply is connected to the wireless intercom module of the sender through a solid state relay, and the serial port interface of the fingerprint recognition module is connected to the Pins 3 and 4 of pin header P2 are connected; on the receiving side, input the voice signal output port of the power amplifier chip 26 to the fire-fighting strong cut interface of the preamplifier through the microphone cable, and pass the output port of J9 in the receiving device 2 through the power cord The relay is connected to the 24V power supply of the preamplifier, and the eight-way signal relay J1-J8 of the receiving device 2 is connected to the input ports of the sound boxes of each zone by using an audio cable. Referring to accompanying drawings 6 and 7, the main working process of the system is as follows: turn on the power switch of the transmitter 1 and press the key KEY1 to enter the main menu of the LCD screen, and the default interface of the LCD initialization is the fingerprint recognition mode. Press the KEY1 button for the second time, the optical fingerprint collection head starts to flash, and the user can press the fingerprint collection head twice successively to collect the fingers stored in the warehouse. At this time, the LCD screen displays the fingerprint number such as 001, and the solid state relay K1 is turned on at the same time. When the button KEY1 is pressed for the third time, it enters the eight-channel broadcast partition selection interface, press the button KEY2 to shift to the eight-channel partition, and the subtitles are reversed to enter the setting state, when the button KEY3 is pressed for the first time, the subtitle display is turned on, and the second press When the subtitle display is turned off, you can set the conduction status of the eight-channel broadcast zone speakers. Since the wireless walkie-talkie modules 19 and 25 work in half-duplex mode, that is, voice transmission and data transmission cannot be carried out simultaneously, so after the button operation is completed, press the PTT button K6 again, the fire-fighting power supply is switched on, and the user faces the microphone U7 starts to speak, and at this moment, the light-emitting diode D8 in the receiving device 2 starts to flicker, the currently playing voice signal stops, and the corresponding sub-area speaker starts to play the user's voice signal. On the contrary, if the user does not have the usage authority, after pressing the fingerprint, the microcontroller 13 controls the buzzer 18 to give an alarm. In addition, the transmitting device 1 is powered by a 3.3V lithium battery, and low power consumption is a very important technical index. When the intercom function is not used, the microcontroller 13 sets the squelch terminal SQ and the power amplifier enable terminal AUDIO_EN to Low, enter standby power saving mode.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (3)

1. a set of wireless interspeaker Based Intelligent Control broadcast system for possessing fingerprint recognition, it is characterised in that possess fingerprint including The wireless interspeaker emitter of identification function and a wireless interspeaker reception device；In the security incident that happens suddenly, Yong Hu Wireless interspeaker voice and number are opened after the fingerprint identification module of wireless interspeaker emitter carries out access right certification According to communication function, corresponding control instruction is sent to wireless interspeaker reception device, power supply and subregion are cut by force in quick-make fire-fighting Audio amplifier, emergency speech signal transmission is played into row major to broadcasting, and the emergency response time is less than 3s, without staff on duty, really Personal safety is protected；The wireless interspeaker reception device includes microcontroller, wireless talkback module, MAX232 circuits, power amplifier Circuit, relay drive circuit and power circuit.

2. the wireless interspeaker Based Intelligent Control broadcast system for possessing fingerprint recognition according to claim 1, it is characterised in that The wireless interspeaker emitter includes fingerprint identification module, microcontroller, wireless interspeaker module, MAX232 circuits, work( Electric discharge road, buzzer alarm circuit, button and liquid crystal display circuit simultaneously carry 3.3V and 5V lithium battery power supplies, can be used as portable The mutual intercommunication of wireless interspeaker；Wherein, microcontroller is used for certification user authority, transmission control instruction and setting voice signal Volume, comprising three serial ports, wherein serial ports 1 is connected with MAX232, and serial ports 2 is connected with the serial port of fingerprint identification module, serial ports 3 Serial port with wireless talkback module is connected, and one of I/O output ports connect Control wireless talkback transmitter module 3.3V power supplies；Under case of emergency, user voluntarily can switch visual liquid crystal display to remote status cooperation relay by button Device quickly starts broadcast power of computer room and setting broadcast subregion, realizes long-distance intelligent control broadcast.

3. the wireless interspeaker Based Intelligent Control broadcast system of fingerprint recognition is possessed according to claim 1, it is characterised in that institute State that the wireless signal that the wireless talkback module in wireless interspeaker reception device will receive is converted to voice signal or control refers to Order, meanwhile, the voice signal that will be obtained after conversion by voice output port transmission to power amplifier, and by the control instruction after conversion By Serial Port Transmission to microcontroller；Microcontroller is used to recognize the control instruction for receiving that serial ports 1 to be connected with MAX232, goes here and there Mouth 3 is connected with the serial port of wireless talkback module, and I/O output ports connect No. nine signal relays and are respectively used to control speech amplifier Room 24V passageways for fire apparatus power supply and broadcast subregion audio amplifier, realize that eight road subregions are automatically controlled and ensure that emergency parachute has highest excellent First level；Power amplifier possesses the performances such as acoustic control start and stop, voice filter and power amplification, and by the voice signal after amplification be input into The fire-fighting of the preamplifier QF2306 of broadcast computer room is cut by force interface priority and is played in default subregion；Power transfer module is mainly wrapped Voltage conversion chip 7812,7805 and AS1117AR-3.3 are included, is responsible for for 24V outside fire-fightings cutting power conversion by force for 3.3V and 5V Two voltage class；Wherein, the microcontroller and intercommunication module in 3.3V power supplys supply reception device are used, and the supply of 5V voltages is outer Circuit is enclosed to use；Output end is when power module incoming transport is electric, if receiver module is in continuous reception pattern, its operating power In 1W, by voltage transformation module for wireless interspeaker reception device is powered, when being input into without sufficiently strong voice signal, mould is received Block is in noise elimination standby electricity-saving mode, and power circuit is only the power supply such as microcontroller.