Air-raid siren state detection and false alarm shutdown device

Abstract

The utility model discloses an anti -air siren state detection and false singing cut -off device belongs to siren detection technical field, and this device includes AC contactor, power module, power amplifier module, current detection module, vibration sound detection module, data processing module and power control module. When working, current detection module and vibration sound detection module gather the work signal of siren, and the signal of output signal after data processing module processing and alarm control system jointly control power control module, and this power control module series connection control AC contactor's coil. When false singing occurs, data detection module controls AC contactor and disconnects main power supply. The utility model can automatically detect siren state and interrupt false singing fast, and has improved detection efficiency and system reliability.

Description

Technical Field

[0001] This utility model belongs to the field of alarm detection technology, specifically relating to an air raid siren status detection and false alarm shutdown device. Background Technology

[0002] Air raid siren systems are important public safety systems that integrate functions such as air defense and disaster early warning. Air raid sirens, as key terminal equipment, are used to send clear and accurate disaster avoidance information to the public when an alarm is triggered.

[0003] These sirens are typically installed on rooftops or other outdoor locations, where they are exposed to wind, rain, and snow. Therefore, they require regular inspection and maintenance to ensure they can sound promptly in the event of a sudden disaster. However, air raid sirens are widely distributed across various locations in urban areas, suburbs, and important economic targets. Traditional inspection methods rely primarily on manual patrols, which are not only inefficient and consume significant manpower and resources but also lack real-time monitoring capabilities.

[0004] More importantly, when air raid sirens sound false alarms due to aging wiring, foreign object intrusion, or other malfunctions, the response to manual maintenance is delayed, making it difficult to detect and arrive at the scene in time to shut down the sirens. This can easily cause unnecessary panic among the public and create adverse social impacts. Summary of the Invention

[0005] Purpose of the invention: The purpose of this utility model is to address the shortcomings of the existing technology by providing an air raid siren status detection and false alarm shutdown device, which aims to solve the problems of time-consuming and labor-intensive manual inspection, delayed maintenance response, and difficulty in timely detection and shutdown of false alarms in the existing technology.

[0006] Technical solution: The air raid siren status detection and false alarm shutdown device of this utility model includes:

[0007] AC contactor;

[0008] A power module, the input terminal of which is connected to the output terminal of the AC contactor;

[0009] A power amplifier module, the input of which is connected to the output of the power supply module and the output of the alarm control system, and the output of which is connected to the loudspeaker of the air raid siren.

[0010] A current detection module, the input of which is connected to the power amplifier module, and the output of which is connected to the data processing module;

[0011] A vibration sound detection module is installed on the speaker;

[0012] The data processing module has its input terminals connected to the output terminals of the current detection module and the vibration and sound detection module, respectively, and its output terminal connected to the power control module. The data processing module is also connected to the alarm control system.

[0013] The power control module has its input terminal connected to the output terminal of the data processing module and the alarm control system, and its output terminal connected to the control terminal of the AC contactor.

[0014] To further improve the above technical solution, the data processing module includes:

[0015] The input terminal of the filtering module is connected to the output terminal of the vibration sound detection module and the output terminal of the current detection module, respectively.

[0016] The data detection module has its input terminal connected to the output terminal of the filtering module, its output terminal connected to the power control module and the alarm control system respectively, and its input terminal connected to the alarm control system.

[0017] Furthermore, the power control module includes relay A and relay B. Relay A is connected to the alarm control system and is used to receive signals from the alarm control system. Relay B is connected to the data detection module and is used to receive signals from the data detection module.

[0018] The contacts of relays A and B are connected in series to the control circuit of the contactor coil of the AC contactor. When the data detection module detects a false alarm signal, relay B disconnects, de-energizing the contactor coil and thus controlling the main contacts of the AC contactor to open.

[0019] Furthermore, the vibration and sound detection module includes a sound sensor and a vibration sensor.

[0020] Furthermore, the current detection module employs a current transformer.

[0021] Beneficial effects: Compared with the prior art, the advantages of this utility model are:

[0022] By incorporating a vibration and sound detection module, a current detection module, and a data processing module, this device tests the alarm control system. The speaker emits a predetermined frequency audio signal, while the vibration and sound detection module and the current detection module collect the corresponding vibration, sound, and current signals. The data processing module analyzes the signals; if the frequency domain and amplitude are within a preset range, the system is considered to be functioning normally; otherwise, it is considered abnormal. This process requires no human intervention, achieving rapid and automatic detection, saving manpower and resources, and improving detection efficiency.

[0023] When the siren is in standby mode, this device continuously monitors vibration, sound, and current signals. When the data processing module detects that the amplitude of these signals exceeds the standard value for silent operation (i.e., a false alarm occurs), it sends an abnormal signal to the siren control system. Simultaneously, the data processing module (via the data detection module) controls the power control module to activate (disconnecting its relay B), which in turn causes the power control module to disconnect the AC contactor, thereby cutting off the power supply to the power module and power amplifier module, instantly interrupting the false alarm. This design improves the operational reliability of the air raid siren and avoids the adverse effects of false alarms.

[0024] This device employs a vibration and sound detection module (including a vibration sensor and a sound sensor) and a current detection module to simultaneously acquire three different types of signals when the speaker is operating. The data processing module can perform cross-validation and statistical fusion of these three signals. This multi-dimensional information acquisition and processing method effectively reduces the inherent error of a single sensor and the interference of outdoor environment (such as wind, rain, and noise) on the detection results, significantly improving the anti-interference capability and accuracy of the detection.

[0025] The data processing module preferably includes a filtering module. Before data detection, the filtering module filters and reduces noise in the collected vibration, sound and current analog signals, reducing interference from external noise and electromagnetic radiation. Then, the data detection module performs A / D conversion and frequency domain comparison, further ensuring the accuracy of the detection results. Attached Figure Description

[0026] Figure 1 This is a block diagram illustrating the control principle of one embodiment of the present invention.

[0027] Figure 2 for Figure 1 Electrical schematic diagram of the power control module in the illustrated embodiment.

[0028] In the diagram: 1. AC contactor; 2. Power supply module; 3. Power amplifier module; 4. Current detection module; 5. Vibration and sound detection module; 6. Filtering module; 7. Data detection module; 8. Power control module. Detailed Implementation

[0029] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings, but the protection scope of this utility model is not limited to the described embodiments.

[0030] Example 1: As Figure 1The air raid siren status detection and false alarm shutdown device shown is installed inside the air raid siren. This device includes an AC contactor 1, a power supply module 2, a power amplifier module 3, a current detection module 4, a vibration and sound detection module 5, a data processing module, and a power control module 8. The siren control system is the main control unit of an existing air raid siren, responsible for receiving commands from higher authorities and issuing regular alarm signals. Simultaneously, its signals are also sent to the data detection module 7 for coordinating detection work. The siren control system itself is not an improvement of this utility model.

[0031] The device's 220V AC power input is first connected to AC contactor 1. The output of AC contactor 1 is connected to power module 2. Power module 2 supplies power to power amplifier module 3, which is connected to the speaker to drive the speaker to produce sound. Preferably, power module 2 can be an AC 220V to DC 60V switching power supply.

[0032] The current detection module 4 is connected to the output terminal of the power amplifier module 3 and is used to detect the operating current of the power amplifier module 3. Preferably, the current detection module 4 can be a current transformer.

[0033] The vibration and sound detection module 5 is installed on the speaker and is used to collect vibration and sound signals when the speaker is working. Preferably, the vibration and sound detection module 5 includes a sound sensor and a vibration sensor.

[0034] The data processing module processes the acquired signals and makes judgments. It includes a filtering module 6 and a data detection module 7. The vibration and sound detection module 5 and the current detection module 4 are both connected to the filtering module 6. The filtering module 6 filters and denoises the acquired vibration, sound, and current signals. The output of the filtering module 6 is connected to the data detection module 7.

[0035] The data detection module 7 is used to perform A / D conversion on the filtered analog signal and then perform subsequent frequency domain or amplitude analysis. The data detection module 7 is connected to both the power control module 8 and the siren control system. The siren control system is the main control unit of the air raid siren and is connected to the power amplifier module 3 to transmit audio signals.

[0036] The power control module 8 is connected to the data detection module 7 and the alarm control system, and is also connected to the AC contactor 1 (specifically, its coil). For example... Figure 2 As shown, the power control module 8 consists of relay A and relay B. Relay A is controlled by signals from the alarm control system, and relay B is controlled by signals from the data detection module 7. Relays A and B are connected in series to control the contactor coil of AC contactor 1.

[0037] The data detection module 7 is specifically implemented as a commercially available, general-purpose microprocessor (MCU) or digital signal processor (DSP) chip. For example, STMicroelectronics' STM32F103 series chip or Texas Instruments' TMS320C6000 series DSP can be used; these are conventional technical components in the field. The data detection module 7 performs threshold comparisons on signal amplitudes and can perform frequency domain analysis using Fast Fourier Transform (FFT), both of which are basic and conventional techniques in the field of signal processing. These well-known algorithms can be implemented by those skilled in the art using standard C or assembly language and embedded in the aforementioned MCU or DSP chip to achieve the required functions.

[0038] The working principle of this utility model is as follows:

[0039] Status Detection Process: When the status of the air raid siren needs to be detected, the siren control system receives the detection command and forwards it to the data detection module 7. Simultaneously, the siren control system sends a sound signal at a preset frequency to the power amplifier module 3. The signal is amplified by the power amplifier module 3 and drives the loudspeaker. At this time, the vibration and sound detection module 5 and the current detection module 4 collect vibration, sound, and current signals respectively. After the signals are filtered and denoised by the filtering module 6, they are sent to the data detection module 7. The data detection module 7 converts the analog signals into digital signals and calculates the frequency domain distribution of the signals. The data detection module 7 compares the calculated frequency domain with the preset audio frequency domain and determines whether the current signal is within the rated range. If the frequency domains of the vibration and sound signals are consistent with the preset frequency domains, and the amplitude of the current signal is within the rated range, the data detection module 7 determines that the loudspeaker is working normally and sends a normal operation signal to the siren control system. If the frequency domains are inconsistent or the current exceeds the range, an abnormal operation signal is sent. The siren control system then uploads the status data to the air raid siren control center.

[0040] False alarm detection and shutdown process: When the air raid siren is in standby mode, the speaker should remain silent. The vibration and sound detection module 5 and the current detection module 4 are still operating at this time, and the collected signals are sent to the data detection module 7 via the filtering module 6. The data detection module 7 continuously monitors the amplitude of vibration, sound, and current signals in standby mode. If the data detection module 7 detects that the amplitude of these signals exceeds the silent standard amplitude and persists for a certain period of time, it determines that the speaker is malfunctioning (false alarm).

[0041] At this time, the data detection module 7 immediately performs two actions: (1) sends a false alarm signal to the alarm control system; (2) sends a signal to the relay B of the power control module 8, such as Figure 2As shown, relay B disconnects, causing the coil of AC contactor 1 to lose power. The main contacts of AC contactor 1 then disconnect, thereby cutting off the 220V main power supply to power module 2 and power amplifier module 3. The speaker immediately stops making abnormal noises because power amplifier module 3 stops working.

[0042] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

1. A device for detecting the status of an air raid siren and shutting off false alarms, characterized in that, include: AC contactor (1); The power module (2) has its input terminal connected to the output terminal of the AC contactor (1); The power amplifier module (3) has its input end connected to the output end of the power supply module (2) and the output end of the alarm control system, and its output end connected to the loudspeaker of the air raid siren. The current detection module (4) has its input end connected to the power amplification module (3) and its output end connected to the data processing module; The vibration sound detection module (5) is installed on the speaker; The data processing module has its input terminals connected to the output terminals of the current detection module (4) and the vibration sound detection module (5) respectively, and its output terminal connected to the power control module (8). The data processing module is also connected to the alarm control system. The power control module (8) has its input terminal connected to the output terminal of the data processing module and the alarm control system, and its output terminal connected to the control terminal of the AC contactor (1).

2. The air raid siren status detection and false alarm shutdown device according to claim 1, characterized in that, The data processing module includes: The input terminal of the filter module (6) is connected to the output terminal of the vibration sound detection module (5) and the output terminal of the current detection module (4), respectively. The data detection module (7) has its input end connected to the output end of the filter module (6), its output end connected to the power control module (8) and the alarm control system respectively, and its input end connected to the alarm control system.

3. The air raid siren status detection and false alarm shutdown device according to claim 2, characterized in that, The power control module (8) includes relay A and relay B. Relay A is connected to the alarm control system and is used to receive alarm control system signals. Relay B is connected to the data detection module (7) and is used to receive data detection module signals. The contacts of relays A and B are connected in series to the control circuit of the contactor coil of the AC contactor (1). When the data detection module (7) detects a false alarm signal, relay B is disconnected, causing the contactor coil to lose power, thereby controlling the main contacts of the AC contactor (1) to open.

4. The air raid siren status detection and false alarm shutdown device according to claim 1, characterized in that, The vibration and sound detection module (5) includes a sound sensor and a vibration sensor.

5. The air raid siren status detection and false alarm shutdown device according to claim 1, characterized in that, The current detection module (4) uses a current transformer.

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