Dual-purpose automatic squelch receiving terminal applied to peacetime and urgency

Abstract

The utility model discloses an automatic squelch receiving terminal applied to both peacetime and urgent time. The automatic squelch receiving terminal comprises a switching power supply module, an automatic squelch receiving module, a master control MCU processor module, an audio storage module and a power supply conversion module, the main control MCU processor module, the audio storage module and the power supply conversion module are all connected with the switching power supply module, the power supply conversion module is connected with the wireless voice transmitting terminal, and the wireless voice transmitting terminal is connected with the automatic squelch receiving module. The automatic squelch receiving module is connected with the master control MCU processor module, and the master control MCU processor module is connected with the audio storage module and the air defense alarm. The air defense alarm has the advantages that a wireless voice transmitting terminal with the same encryption mode as that of the terminal can be received, other interfering audio signals are automatically squelch, the broadcasting function of the air defense alarm is combined, the ordinary application scene of the traditional air defense alarm is increased, and the diversified requirements of emergency management of modern cities are met.

Description

Technical Field

[0001] This utility model relates to the field of civil defense alarm technology, and in particular to an automatic noise reduction receiving terminal applicable to both peacetime and emergency use. Background Technology

[0002] Air raid siren systems are a crucial component of urban air defense systems. In peacetime, they are used for disaster relief and emergency reporting during sudden incidents; in wartime, they serve as air raid warnings and are a fundamental means of commanding air defense operations and organizing population evacuation and shelter. Therefore, air raid siren systems must be effective not only in wartime but also in peacetime. Traditional air raid sirens focus solely on wartime air defense applications, resulting in a limited usage scenario. They remain dormant during peacetime and are rarely used, failing to effectively respond to the diverse needs of modern urban emergency management. Existing receiving terminals lack effective encryption methods, making it impossible to prevent interference from other audio signals, thus causing mis-broadcasting incidents. Utility Model Content

[0003] The purpose of this invention is to provide an automatic noise reduction receiving terminal applicable to both normal and emergency use, thereby solving the aforementioned problems existing in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An automatic noise suppression receiver terminal for both peacetime and emergency use includes a switching power supply module, an automatic noise suppression receiver module, a main control MCU processor module, an audio storage module, and a power conversion module. The main control MCU processor module, the audio storage module, and the power conversion module are all connected to the switching power supply module. The power conversion module is connected to a wireless voice transmitter terminal. The wireless voice transmitter terminal is connected to the automatic noise suppression receiver module. The automatic noise suppression receiver module is connected to the main control MCU processor module. The main control MCU processor module is connected to the audio storage module and an air raid siren.

[0006] Preferably, the switching power supply module has a 220V AC input and a 12V DC output; the DC power output terminal of the switching power supply module is connected to the power input terminals of the main control MCU processor module, the audio storage module, and the power conversion module, respectively.

[0007] Preferably, all interfaces of the automatic noise-squel receiver module are pad-type interfaces, and each interface is distributed around the perimeter of the automatic noise-squel receiver module; the power input terminal of the automatic noise-squel receiver module is connected to the power output terminal of the main control MCU processor module, the audio output terminal of the automatic noise-squel receiver module is connected to the audio input terminal of the main control MCU processor module, the serial data communication terminal of the automatic noise-squel receiver module is connected to the serial data communication terminal of the main control MCU processor, and the audio input terminal of the automatic noise-squel receiver module is connected to the audio output terminal of the wireless voice transmitter terminal.

[0008] Preferably, the automatic noise suppression receiver module and the main control MCU processor module are fixed together by welding to form a tight electrical connection; the automatic noise suppression receiver module is provided with a metal shield.

[0009] Preferably, the main control MCU processor module includes an MCU power conversion circuit, an MCU processor, an audio expansion circuit, a frequency adjustment knob, a volume adjustment knob, and an LED indicator. The DC output terminal of the switching power supply module is connected to the power input terminal of the MCU power conversion circuit. The power output terminal of the MCU power conversion circuit is connected to the power input terminals of the MCU processor, the audio expansion circuit, and the automatic mute receiving module. The frequency adjustment knob, the volume adjustment knob, and the audio expansion circuit are respectively connected to three status acquisition terminals of the MCU processor. The LED indicator is connected to the status control terminal of the MCU processor. The serial data communication terminal of the MCU processor is connected to the serial data communication terminal of the automatic mute receiving module. The audio input terminal of the audio expansion circuit is connected to the audio output terminal of the automatic mute receiving module. The audio output terminal of the audio expansion circuit is connected to the audio storage module and the audio input terminal of the air raid siren.

[0010] Preferably, the power output terminal of the switching power supply module is connected to the power input terminal of the audio storage module, the audio input terminal of the audio storage module is connected to the audio output terminal of the main control MCU processor module, and the audio storage terminal of the audio storage module is connected to a memory card.

[0011] Preferably, the audio storage terminal of the audio storage module adopts a spring-loaded card holder structure to connect the memory card. A metal spring is provided inside the spring-loaded card holder structure. When the memory card is inserted into the spring-loaded card holder structure, the metal spring and the contacts of the memory card make close contact to achieve electrical connection.

[0012] Preferably, a rubber shock-absorbing pad for vibration damping is installed between the circuit board of the audio storage module and the housing.

[0013] Preferably, the power conversion module includes a power conversion circuit and a USB charging interface. The DC output terminal of the switching power supply module is connected to the power input terminal of the power conversion circuit, the power output terminal of the power conversion circuit is connected to the power input terminal of the USB charging interface, and the power output terminal of the USB charging interface is connected to the power input terminal of the wireless voice transmitting terminal.

[0014] Preferably, the USB charging port adopts a panel-fixed structure, which is fixed on the chassis panel, making it easy for other devices to connect to the USB charging port on the chassis panel for charging.

[0015] The beneficial effects of this utility model are: the automatic noise reduction receiving terminal can receive audio signals using this encryption method, broadcast them via air raid sirens, and store the audio signals for easy review of the broadcast events later; audio signals not using this encryption method are automatically muted to avoid interference from other audio signals. This application scenario is consistent with the normal application scenario of air raid siren systems, improving the security of air raid siren systems during normal use. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the automatic noise reduction receiving terminal in an embodiment of this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0018] like Figure 1 As shown, this embodiment provides an automatic noise suppression receiver terminal applicable to both peacetime and emergency use, including a switching power supply module, an automatic noise suppression receiver module, a main control MCU processor module, an audio storage module, and a power conversion module. The main control MCU processor module, the audio storage module, and the power conversion module are all connected to the switching power supply module. The power conversion module is connected to a wireless voice transmitter terminal, the wireless voice transmitter terminal is connected to the automatic noise suppression receiver module, the automatic noise suppression receiver module is connected to the main control MCU processor module, and the main control MCU processor module is connected to the audio storage module and an air raid siren. In this embodiment... Figure 1 In the diagram, a single dashed line and arrow represent power supply relationships, a single solid line and arrow represent control / status signal relationships, double solid lines and arrows represent audio signal transmission relationships, and double dashed lines and arrows represent wireless connection relationships.

[0019] In this embodiment, the switching power supply module has a 220V AC input and a 12V DC output. The DC power output terminal of the switching power supply module is electrically connected to the power input terminals of the main control MCU processor module, the audio storage module, and the power conversion module, respectively, and is used to supply power to the main control MCU processor module, the audio storage module, and the power conversion module.

[0020] In this embodiment, the automatic squelch receiver module has a power input terminal, an audio output terminal, and a serial data communication terminal. All interfaces of the automatic squelch receiver module are pad-type interfaces, distributed around the perimeter of the module. The power input terminal of the automatic squelch receiver module is electrically connected to the power output terminal of the main control MCU processor module, and is powered by the main control MCU processor module. The audio output terminal of the automatic squelch receiver module is electrically connected to the audio input terminal of the main control MCU processor module, and is used to send the received audio information to the main control MCU processor module for processing. The serial data communication terminal of the automatic squelch receiver module is electrically connected to the serial data communication terminal of the main control MCU processor module, and performs serial data communication with the main control MCU processor module. The audio input terminal of the automatic squelch receiver module is connected to the audio output terminal of the wireless voice transmitter terminal, and is used to receive the audio signal sent by the wireless voice transmitter terminal and analyze and process it.

[0021] In this embodiment, the automatic noise-squeezing receiver module and the main control MCU processor module are fixed by welding to form a tight electrical connection, which effectively reduces signal transmission interference.

[0022] The automatic noise-squeezing receiver module effectively isolates external electromagnetic interference from the wireless communication of the module by setting a metal shield on the module.

[0023] After receiving the audio signal from the wireless voice transmitter, the automatic squelch receiver module analyzes and processes it. 1. If the analysis result matches the local encryption method, the audio signal is sent to the main control MCU processor module through the audio output interface. 2. If the analysis result differs from the local encryption method, the squelch function is activated, and the audio output is disabled.

[0024] In this embodiment, the main control MCU processor module includes an MCU processor, an audio expansion circuit, a frequency adjustment knob, a volume adjustment knob, LED indicators, and an MCU power conversion circuit. The MCU processor has a power input terminal, a serial data communication terminal, a status acquisition terminal, and a status control terminal; the audio expansion circuit has a power input terminal, an audio input terminal, and an audio output terminal. The power input terminal of the power conversion circuit is electrically connected to the DC output terminal of the switching power supply module, and is powered by the switching power supply module. The power output terminal of the MCU power conversion circuit is electrically connected to the power input terminals of the MCU processor, the automatic mute receiving module, and the audio expansion circuit, and is used to supply power to the MCU processor and the automatic mute receiving module. The status output terminal of the frequency adjustment knob is electrically connected to one status acquisition terminal (I / O port) of the MCU processor, and is used to acquire the status information of the frequency adjustment knob. The volume adjustment knob is electrically connected to another status acquisition terminal (I / O port) of the MCU processor, and is used to acquire the status information of the volume adjustment knob. The audio expansion circuit is electrically connected to another status acquisition terminal (I / O port) of the MCU processor, and is used to acquire whether there is an audio signal. The control input terminal of the LED indicator is electrically connected to the status control terminal (I / O port) of the MCU processor to control the LED indicator status. The serial data communication terminal of the MCU processor is electrically connected to the serial data communication terminal of the automatic mute receiver module to control parameters such as the receiving frequency and output audio signal magnitude of the automatic mute receiver module. The audio input terminal of the audio expansion circuit is electrically connected to the audio output terminal of the automatic mute receiver module to receive the audio signal from the automatic mute receiver module. The audio output terminal of the audio expansion circuit is electrically connected to both the audio storage module and the audio input interface of the external air raid siren for audio storage and voice broadcasting via the air raid siren.

[0025] After receiving the audio signal from the wireless voice transmitter, the automatic squelch receiver module analyzes the encryption method of the received signal. If the analysis result matches the local encryption method, the audio signal is sent to the audio expansion circuit in the main control MCU processor module. The audio expansion circuit expands the received audio signal into two isolated audio signals, which are then sent to the audio storage module for audio storage or to the audio output interface for connection to the air raid siren for voice broadcasting. Simultaneously, the MCU processor controls the LED indicator to light up when it detects an audio signal from the audio expansion circuit, indicating to the user that an audio signal has been received. If the analysis result differs from the local encryption method, the automatic squelch receiver module activates the squelch function and shuts down the audio output, effectively preventing other audio signals from entering the air raid siren and avoiding false broadcasts.

[0026] Adjusting the frequency adjustment knob in the main control MCU processor module, the MCU processor collects the change in the frequency adjustment knob, analyzes and processes the collected value, and sends a frequency adjustment command to the automatic squelch receiver module through the serial data communication terminal to control the automatic squelch receiver module to change its receiving frequency.

[0027] Adjusting the volume control knob in the main control MCU processor module, the MCU processor detects the change in the volume control knob, analyzes and processes the detected value, and sends a volume level adjustment command to the automatic squelch receiver module through the serial data communication terminal. This controls the change in the audio output signal of the automatic squelch receiver module to meet the voice broadcasting function in different application scenarios.

[0028] In this embodiment, the audio storage module has a power input terminal, an audio input terminal, and an audio storage terminal. The power output terminal of the switching power supply module is connected to the power input terminal of the audio storage module to supply power to the audio storage module; the audio input terminal of the audio storage module is connected to one audio output terminal of the main control MCU processor module to receive audio signals from the main control MCU processor module; the audio storage terminal of the audio storage module is connected to a memory card to store the received audio signals.

[0029] The audio storage module uses a spring-loaded card slot structure for card installation. Inside the slot is a flexible metal piece. When the memory card is inserted into the slot, the flexible metal piece makes tight contact with the contacts of the memory card to achieve electrical connection.

[0030] To improve the shock resistance of the audio storage module, rubber shock-absorbing pads are installed between the circuit board of the audio storage module and the terminal housing.

[0031] In this embodiment, the power conversion module consists of a power conversion circuit and a USB charging interface. The power input terminal of the power conversion circuit is electrically connected to the DC output terminal of the switching power supply module, and is powered by the switching power supply module.

[0032] The USB charging interface uses a USB port design, which is fixed to the front panel of the chassis, making it easy for other devices to connect to the port for charging.

[0033] The USB charging port can charge the wireless voice transmitter. In an emergency, when the mains power is disconnected and the wireless voice transmitter cannot be charged via mains power, it can be used for emergency charging to ensure the system continues to function normally.

[0034] In this embodiment, the application scenarios of the automatic noise reduction receiver terminal include: In scenarios such as forest farms and reservoirs, when patrol personnel discover other personnel entering a dangerous area, they can use a wireless voice transmitter terminal with the same encryption method as the receiver terminal to send an audio signal to the receiver terminal. The receiver terminal then transmits the audio signal to an air raid siren for voice broadcasting, driving away other personnel from the dangerous area. Simultaneously, the audio signal is stored in the audio storage module, enabling the air raid siren system to be used in both peacetime and emergency applications. In scenarios such as villages, scenic spots, and densely populated areas, broadcasters use a wireless voice transmitter terminal with the same encryption method as the receiver terminal to send an audio signal to the receiver terminal. The receiver terminal then transmits the audio signal to an air raid siren for voice broadcasting, enabling the broadcasting and propaganda function in villages, scenic spots, and densely populated areas. Simultaneously, the audio signal is stored in the audio storage module, enabling the air raid siren system to be used in both peacetime and emergency applications.

[0035] By adopting the above-disclosed technical solution of this utility model, the following beneficial effects are obtained:

[0036] This invention provides an automatic noise reduction receiver terminal applicable to both peacetime and emergency use. It enables the reception of audio signals using this encryption method, broadcasting them via air raid sirens, and storing the audio signals for easy review of the broadcast events later. Audio signals not using this encryption method are automatically muted to avoid interference from other audio signals. This application scenario aligns with the normal operation of air raid siren systems, improving the security of air raid siren systems during peacetime use.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An automatic noise suppression receiver terminal applicable to both peacetime and emergency use, characterized in that: It includes a switching power supply module, an automatic noise reduction receiving module, a main control MCU processor module, an audio storage module, and a power conversion module; the main control MCU processor module, the audio storage module, and the power conversion module are all connected to the switching power supply module, the power conversion module is connected to a wireless voice transmitting terminal, the wireless voice transmitting terminal is connected to the automatic noise reduction receiving module, the automatic noise reduction receiving module is connected to the main control MCU processor module, and the main control MCU processor module is connected to the audio storage module and an air raid siren.

2. The automatic noise suppression receiver terminal for both peacetime and emergency use as described in claim 1, characterized in that: The switching power supply module has a 220V AC input and a 12V DC output; the DC power output terminal of the switching power supply module is connected to the power input terminals of the main control MCU processor module, the audio storage module, and the power conversion module, respectively.

3. The automatic noise suppression receiver terminal for both peacetime and emergency use as described in claim 2, characterized in that: All interfaces of the automatic noise-squel receiver module are pad-type interfaces, and each interface is distributed around the perimeter of the automatic noise-squel receiver module. The power input terminal of the automatic noise-squel receiver module is connected to the power output terminal of the main control MCU processor module, the audio output terminal of the automatic noise-squel receiver module is connected to the audio input terminal of the main control MCU processor module, the serial data communication terminal of the automatic noise-squel receiver module is connected to the serial data communication terminal of the main control MCU processor, and the audio input terminal of the automatic noise-squel receiver module is connected to the audio output terminal of the wireless voice transmitter terminal.

4. The automatic noise suppression receiver terminal for both peacetime and emergency use as described in claim 3, characterized in that: The automatic noise reduction receiver module and the main control MCU processor module are fixed together by welding to form a tight electrical connection; the automatic noise reduction receiver module is provided with a metal shield.

5. The automatic noise suppression receiver terminal for both peacetime and emergency use as described in claim 4, characterized in that: The main control MCU processor module includes an MCU power conversion circuit, an MCU processor, an audio expansion circuit, a frequency adjustment knob, a volume adjustment knob, and LED indicators. The DC output terminal of the switching power supply module is connected to the power input terminal of the MCU power conversion circuit. The power output terminal of the MCU power conversion circuit is connected to the power input terminals of the MCU processor, the audio expansion circuit, and the automatic mute receiving module. The frequency adjustment knob, the volume adjustment knob, and the audio expansion circuit are respectively connected to three status acquisition terminals of the MCU processor. The LED indicator is connected to the status control terminal of the MCU processor. The serial data communication terminal of the MCU processor is connected to the serial data communication terminal of the automatic mute receiving module. The audio input terminal of the audio expansion circuit is connected to the audio output terminal of the automatic mute receiving module. The audio output terminal of the audio expansion circuit is connected to the audio storage module and the audio input terminal of the air raid siren.

6. The automatic noise suppression receiver terminal for both peacetime and emergency use as described in claim 5, characterized in that: The power output terminal of the switching power supply module is connected to the power input terminal of the audio storage module, the audio input terminal of the audio storage module is connected to the audio output terminal of the main control MCU processor module, and the audio storage terminal of the audio storage module is connected to the memory card.

7. The automatic noise suppression receiver terminal for both peacetime and emergency use as described in claim 6, characterized in that: The audio storage module uses a spring-loaded card slot structure to connect the memory card. A metal spring is provided inside the spring-loaded card slot structure. When the memory card is inserted into the spring-loaded card slot structure, the metal spring and the contacts of the memory card make close contact to achieve electrical connection.

8. The automatic noise suppression receiver terminal for both peacetime and emergency use as described in claim 7, characterized in that: The audio storage module has a rubber shock-absorbing pad installed between its circuit board and the housing for vibration resistance.

9. The automatic noise suppression receiver terminal for both peacetime and emergency use as described in claim 8, characterized in that: The power conversion module includes a power conversion circuit and a USB charging interface. The DC output terminal of the switching power supply module is connected to the power input terminal of the power conversion circuit, the power output terminal of the power conversion circuit is connected to the power input terminal of the USB charging interface, and the power output terminal of the USB charging interface is connected to the power input terminal of the wireless voice transmitting terminal.

10. The automatic noise suppression receiver terminal for both peacetime and emergency use according to claim 9, characterized in that: The USB charging port adopts a panel-fixed structure, which is fixed on the chassis panel, making it easy for other devices to connect to the USB charging port on the chassis panel for charging.

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