CN104104460A - Wireless interphone intelligent control broadcasting system having fingerprint identification function - Google Patents

Abstract

The invention discloses a wireless interphone intelligent control broadcasting system having a fingerprint identification function. The system includes a transmitting device and a receiving device, through the system, a user does not need to replace existing broadcast machine room equipment, and only needs to connect a wireless interphone emergency start receiving device to a broadcast machine room power supply, a pre-amplifier and a sound box, after the right of use is obtained through fingerprint identification authentication, start and stop of the broadcast machine room can be directly controlled through a human-computer interface and voice signals are transmitted to preset broadcast partitions. The system can identify user fingerprints, and distinguishes the authenticity of a holder, is high in confidentiality and economical and simple to realize, the response time is less than 3 seconds, and the system does not need a specially-assigned person for attending, and has functions of timely and reliable communication, effective command and efficient handling in sudden safety accidents.

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. the

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

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

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-talkies are converted from analog to digital, and have the functions of voice transmission and data transmission. On this basis, the walkie-talkies 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 has obvious public welfare. 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. the

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. the

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

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

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. the

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

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 the 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

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

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

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

The wireless intercom module is used to send out 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

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

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

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

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

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

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

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

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

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

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. the

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 the schematic diagram of the relay driving circuit of the present invention;

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

Fig. 7 is the work flowchart of 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 . the

Detailed ways

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

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. the

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 its own 3.3V and 5V lithium batteries 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. the

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. the

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. the

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. the

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 is used as a portable walkie-talkie to communicate with other walkie-talkies, the receiver number can be set through the target ID number. the

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

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

Claims (3)

1. A set of wireless walkie-talkie intelligent control broadcasting system with fingerprint recognition, characterized in that it includes a wireless walkie-talkie transmitter with fingerprint recognition function and a wireless walkie-talkie receiver. In a sudden safety accident, the user turns on the voice and data communication functions of the wireless walkie-talkie after authentication through the fingerprint identification module of the wireless walkie-talkie transmitter, sends corresponding control commands to the wireless walkie-talkie receiving device, and quickly switches on the fire-fighting forced power supply And partition speakers, the emergency voice signal is transmitted to the radio for priority playback. The emergency response time is less than 3s, and there is no need for special personnel to be on duty, ensuring personal safety. 2. The wireless walkie-talkie transmitting device according to claim 1, characterized in that the device comprises a fingerprint recognition module, a microcontroller, a wireless walkie-talkie module, a MAX232 circuit, a power amplifier circuit, a buzzer alarm circuit, buttons and a liquid crystal display circuit And it comes with 3.3V and 5V lithium batteries for power supply, which can be used as a portable wireless walkie-talkie to talk to each other. Among them, the microcontroller is used to authenticate user rights, transmit control commands and set the volume of voice signals. The serial port of the intercom module is connected, and one of the I/O output ports is connected to a relay to control the 3.3V power supply of the wireless intercom transmitter module. In case of emergency, the user can press the button to switch the visual LCD screen to the remote state, and cooperate with the relay to quickly start the power supply of the broadcasting machine room and set the broadcasting partition to realize remote intelligent control broadcasting. 3. The wireless intercom receiving device according to claim 1, characterized in that it comprises a microcontroller, a wireless intercom module, a MAX232 circuit, a power amplifier circuit, a relay drive circuit and a power supply circuit. Among them, the wireless intercom module converts the received wireless signal into a voice signal or control command, and at the same time, transmits the converted voice signal to the power amplifier through the voice output port, and transmits the converted control command to the microcomputer through the serial port. controller. The microcontroller is used to identify the received control commands, the serial port 1 is connected to the MAX232, the serial port 3 is connected to the serial port of the wireless intercom module, and the I/O output port is connected to nine signal relays to control the 24V fire channel power supply of the broadcasting machine room. and broadcast partition speakers to realize automatic control of eight-way partitions and ensure that emergency signals have the highest priority. The power amplifier circuit has the functions of voice control start and stop, voice filtering and power amplification, and the amplified voice signal is input to the preamplifier QF2306 in the broadcasting machine room. The fire protection cut-off interface is preferentially played in the preset zone. The power conversion module mainly includes voltage conversion chips 7812, 7805 and AS1117AR-3.3, which are responsible for converting the 24V external fire-fighting forced power supply into two voltage levels of 3.3V and 5V. Among them, the 3.3V power supply is used for the microcontroller and the intercom module on the receiving device, and the 5V voltage is used for the peripheral circuits. When the output terminal is connected to the AC power supply module, if the receiving module is in continuous receiving mode, its working power is 1W, and the wireless intercom receiving device is powered through the voltage conversion module. When there is no strong enough voice signal input, the receiving module is in squelch standby In power-saving mode, the power circuit supplies power only to microcontrollers, etc.