Portable drone-mounted gas detector

                                                                                                                  UAV-mounted Gas Detector

Background Overview

With the increasingly severe air pollution in our country in recent years, the proportion of pollutants has become heavier, and thus the task of air pollution detection and control in China is becoming more arduous. The state has deployed and improved particulate matter and gas detection equipment in most cities, forming a ground-based pollution source detection network with dense distribution combining national control points and provincial control points.

However, we can also clearly see that there is still a large gap between the predictions made based on ground detection data from national control points and the development of actual environmental pollution conditions. In addition, the control measures implemented based on ground monitoring data, such as ground sprinkling, construction site covering, traffic restrictions, industrial production limits, boiler retrofitting, and desulfurization and denitrification treatments, have not yielded satisfactory results.

As the third-generation remote sensing technology following aviation and aerospace remote sensing, UAV (Unmanned Aerial Vehicle) remote sensing technology has advantages such as three-dimensional monitoring, fast response speed, wide monitoring range, and small terrain interference. It is one of the important development directions for identifying pollution sources and monitoring concentrations in atmospheric emergencies in the future.

However, due to the limited payload of UAVs, completing high-precision atmospheric environmental monitoring work requires high-precision sensor payloads, and there are few options available for traditional sensors due to restrictions on volume, weight, etc. Therefore, our company has researched and developed small, lightweight sensor payloads suitable for UAV mounting to realize UAV atmospheric pollution monitoring and UAV fixed pollutant detection.

Features of UAV-mounted Gas Detector

● The software supports multiple UAV manufacturers, including all series of DJI

● Thousands of gas sensors can be replaced at any time, and the system features automatic gas type recognition

● Housing design with waterproof, windproof, dustproof, and impact resistance

● Real-time display and real-time transmission of monitoring data, generating corresponding trend curves

● View historical real-time data, and simultaneously generate curve analysis charts; list and chart styles display historical data for easy comparison and viewing

● Can display longitude, latitude, altitude, aircraft status, temperature, humidity, PM1, PM2.5, PM10, and real-time concentration values of thousands of gases

● Detection accuracy can reach ppb level

● Real-time wireless data transmission to the ground terminal, and also real-time transmission to the server via GPRS

UAV Gas Detection Payload Parameters

● Applicable: Multi-rotor UAVs, Fixed-wing

● Detectable Gases: PM2.5, PM10, NO2, SO2, CO, O3, VOC, etc. (optional)

● Detection Principle: Electrochemical, Laser

● Weight: 1000 grams (7 parameters)

● Dimensions: 220×145×60mm

● Power Supply: 12-24V

● Data Transmission Mode: 4G/Wireless data link

● Operating Temperature: (-30~+60)℃

● Operating Humidity: (15 ~ 95)% RH, non-condensing

● Equipment Life: 5 years or more (excluding consumables)

UAV Gas Detection Payload Dimension Diagram

The software of the ground receiving system is specially designed proprietary software for receiving, decoding, displaying, processing, and reporting the above-mentioned monitoring and detection data. It is separate from the flight control software and consists of two relatively independent software programs. When the UAV flies normally with our company's gas detection equipment, it can detect concentration values in real-time and transmit them back to the ground software for data analysis and display. It also supports synchronous data return and processing functions for multiple detectors.

The data analysis software platform mainly includes functions such as real-time data display, checking whether the detection environment data status is normal, alarm value points, real-time data value change trends, and historical data query and export, which are synchronized on the ground receiving system.

(1) Real-time data display is shown in the figure below:

Data Display Monitoring Large Screen

The software platform can display corresponding detection data and change trends in real-time, integrating air quality gas sensor data and toxic gas emergency monitoring data into a unified platform for unified management and comprehensive display. Gas sensor data represents different pollution levels with different colors.

(2) Historical data query is shown in the figure below:

Historical Data Query Interface

Perform simple statistical analysis on historical monitoring data of various points, such as daily variation analysis and time series analysis, helping the purchaser save manual analysis time costs, and also helping the purchaser understand the basic pollution status.

Flight Cruise Diagram

Through the flight mission function, the Besiyun monitoring platform can specifically display the flight route and real-time concentration during the flight, displaying via real-time updates, pollution concentration levels, etc. It is also compatible with synchronous gimbal display, achieving synchronous display of data and video.

1 System Structure and Working Principle

This system mainly consists of unmanned aerial vehicles, Besian BSA/QT-UAV gas detectors, data links/GPRS, ground stations/servers, and data processing software. Its main function is to detect atmospheric air quality AQI and emergency detection of toxic and harmful gases, with an accuracy of up to 1PPB. It changes the traditional fixed-point detection, making gas detection flexible, fast, accurate, and convenient.

2 Software Implementation of Gas Concentration Data Acquisition

In terms of gas detection, there are tens of thousands of gas types, ranges, accuracies, etc. To simplify user operation and costs, our company has specially designed a series of intelligent sensors. It has a complete set of software information systems, effectively dividing all detectable gas types to realize a fully intelligent recognition system. Customers can equip different sensors according to different detection scenarios, making UAV gas detection very flexible and unaffected by the payload.

Application Fields: Mounted on UAVs, automobiles, robot inspections, ships, etc.

1. Fire emergency monitoring and investigation of leakage danger sources

2. Pipeline leakage inspection

3. Air quality detection

4. Enterprise emission pollution detection

5. Monitoring of pollution gases around chemical, petroleum, and other enterprises

6. Monitoring of exhaust gas emissions from ships at ports and wharves

7. Rapid environmental screening and locking

8. Robot safety inspection in specific areas and special warehouses