Air quality detector mounted on a drone

                                                                                   UAV-mounted Gas Detector

Background Overview

With the increasingly severe air pollution in our country in recent years and the growing proportion of pollutants, the task of air pollution detection and control has become increasingly heavy. The state has deployed and improved particulate matter and gas detection equipment in most cities, forming a dense ground pollution source detection network 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 transformation, desulfurization and denitrification treatment, etc., have not yielded satisfactory results.

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

However, due to the limited payload of UAVs, completing high-precision atmospheric environmental monitoring work requires high-precision sensor payloads. There are not many traditional sensors to choose from due to limitations in 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 fixed pollutant detection by UAVs.

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 has an automatic gas type recognition function

● Housing design is waterproof, windproof, dustproof, and impact-resistant

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

● View historical real-time data, and simultaneously generate curve analysis charts, lists, and chart styles to display historical data, facilitating comparative viewing

● Can display longitude and 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: 1000g (7 parameters)

● Dimensions: 220×145×60mm

● Power Supply: 12-24V

● Data Transmission Mode: 4G/Wireless data transmission

● Working Environment Temperature: (-30~+60)℃

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

● Equipment Lifespan: More than 5 years (excluding consumables)

UAV Gas Detection Payload Dimension Diagram

The software of the ground receiving system is specially designed dedicated software for receiving, decoding, displaying, processing, and reporting the above-mentioned monitoring and detection data. It is a separate software relatively independent from the flight control software. 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, as well as 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 the corresponding detection data and change trends in real time. It integrates air quality gas sensor data and toxic gas emergency monitoring data into a unified platform for unified management and comprehensive display. Gas sensor data use different colors to represent different pollution levels.

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

Historical Data Query Interface

Perform simple statistical analysis on historical monitoring data of each point, such as daily variation analysis, time series analysis, etc., to help the purchaser save the time cost of manual analysis, and also help the purchaser understand the basic pollution status.

Flight Cruise Diagram

Through the flight task function, the Besiyun monitoring platform can specifically display the flight route and real-time concentration display during the flight. It displays through real-time data and pollution concentration levels, and can also support synchronous display with the gimbal; 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 transmission/GPRS, ground stations/servers, and data processing software. It is mainly used 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

There are tens of thousands of gas types, ranges, and accuracies in gas detection. In order to simplify user operation and cost, our company has specially designed a set of smart sensor series. 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 not affected by the payload.

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

1. Fire emergency monitoring and screening for leakage of dangerous sources

2. Pipeline leakage inspection

3. Air quality detection

4. Enterprise emission pollution detection

5. Monitoring of polluted 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