Debris flow infrasound monitoring station

Debris flow infrasound monitoring stationSpecially designed for geological hazard warning, real-time monitoring is achieved by capturing the infrasound signals generated by debris flow movement. The equipment is equipped with high-sensitivity capacitive sensors, combined with digital filtering technology to accurately identify infrasound characteristics, and utilizes the low attenuation propagation characteristics of the air medium for early warning. Integrated solar power supply system and low-power circuit design, supporting wireless data transmission and remote management, can be linked with warning broadcasting to form a multi-level response mechanism, suitable for long-term stable operation in complex mountainous environments.

Debris flow infrasound monitoring stationDeveloped independently by our company, this product has significant characteristics of high acquisition frequency, low power consumption, and stable reliability. It is mainly suitable for capturing and detecting infrasound signals of debris flow disasters and internal rock and soil fractures, and can achieve disaster warning.

Key Features:

(1) High sampling frequency: According to the signal sampling law, combined with the infrasound signal frequency band, the basic sampling frequency is 100Hz, which meets the requirements of infrasound signal detection and recognition;

(2) Front end edge computing: the front end is equipped with a computing performance processing chip and embedded filtering algorithm, which can better solve the problem of known signal source interference, and the front end integration can obtain effective sound pressure data;

(3) Reliable transmission mechanism, combined with the actual situation of application scenarios, multiple communication mechanisms can be selected to ensure timely and smooth transmission of observation data to the cloud;

(4) Backend data analysis and processing: Following the original signal filtering time domain frequency domain time-frequency domain analysis process, quickly detect abnormal signals;

(5) Warning: Optional SMS APP 、 Receive warning information and briefings through various means such as email;

(6) Installation and deployment: An installation and deployment plan with independent intellectual property rights that overcomes known noise interference from an applicable perspective.

(7) Adopting aluminum milling shell, sealing rubber ring, and anti drop soft rubber design, it has excellent anti drop and shock absorption performance, which well meets the needs of outdoor application scenarios.

Working conditions:

Working voltage: 12V~36V;

Instantaneous maximum current: ≤ 5A;

Working current: 10mA~120mA;

Rated power consumption: less than 1.2W;

Working temperature: -40 ℃~85 ℃;

Working humidity: 95% RH without condensation

Technical Indicators:

Measurement range: 5Hz~20kHz ± 2dB

Sensitivity: 50mV/Pa

3 Local noise: less than 17dBm

Sampling frequency: not less than 100Hz

5 communication methods: RS232, 4G communication, radio communication, fiber optic communication

6 Working temperature: -40 ℃~85 ℃

7. Working humidity: 95% RH, no condensation

8 impact/vibration: can withstand a 2m free fall

9 Power supply mode: 12~36V DC wide voltage power supply

Weight: 1.5kg

11 Software Overview: Supports dynamic calculation and detection, real-time output of warning results

Monitoring system architecture

The monitoring station mainly consists of a capacitive infrasound signal sensor, a power supply system (powered by solar energy and lithium batteries), a monitoring core unit (acquisition equipment), and a communication system (4G communication module). The frequency range of the sensor is 0.5Hz-300Hz, with a sensitivity of 50mV/Pa, covering the entire frequency band of infrasound waves generated by debris flow disasters/rock and soil fractures, ensuring the reception of reliable infrasound signals, which is at a high level in China. The monitoring motherboard is a low-power, high-sensitivity geological hazard monitoring data acquisition and transmission device suitable for outdoor use. Multi channel data acquisition; A/D resolution: 24 bits; Wireless transmission method: 4G/GPRS; Protection level IP67; The GPS module synchronizes timing with an error of less than 0 1ms。