Detection method for indicating direction of odor source in three-dimensional environment

Abstract

The invention relates to a detection method for indicating the direction of an odor source in a three-dimensional environment. According to the method, odor sensors are mounted on the peak of a regular polyhedron, so that the sensors are uniformly distributed on one spherical surface. The method for solving the direction of the source of an odor pack comprises the following steps: detecting the odor pack; monitoring concentration values output by the sensors, judging that a sensor detects the odor pack if a concentration value is higher than a set threshold, taking the sensor as the first sensor, and after a second sensor and a third sensor detect the odor pack, recording the time difference in detecting the odor pack; judging if a same pack condition is met; calculating the three-dimensional source direction of the odor pack according to the time difference in detecting the odor pack; stipulating a vector of a point on the spherical surface directing to the center of sphere as the source direction of the odor pack, calculating the source direction of the odor pack, designating a point needing calculating the direction vector corresponding to the spherical surface as a target point, and solving the coordinates of the target point. The detection method has the characteristics of high precision, no need of knowing wind information and the like.

Description

technical field [0001] The invention relates to a gas detection device and method, especially capable of indicating the direction of an odor source in a three-dimensional environment. Background technique [0002] With the development of industry and the advancement of technology, more and more dangerous chemicals are directly or indirectly used in production and life. Once the toxic and harmful gas leaks, the harm will be huge. Historically, there have been many large-scale poisonous and harmful gas leakage accidents at home and abroad, causing heavy casualties and property losses. Therefore, the detection of odor sources, especially the detection of toxic and harmful gas leakage sources is of great significance in accident early warning, environmental monitoring, disaster rescue and other aspects. [0003] At present, the research on odor source detection mainly focuses on the active olfactory search of robots in a two-dimensional environment, that is, the use of single ...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: 1) the use of ground robots has more restrictions, and the practicability is poor

When the source of the leak is in the air, the result is not correct because the ground robot cannot perform a three-dimensional search

[0004] Patent CN201410605741.2 proposes a portable gas detection device for indicating the direction of the odor source, but the device has the following disadvantages: 1) It can only detect the direction of the odor source two-dimensionally, and it is also not suitable for the odor source in the air 2) The accuracy of direction estimation is 30 degrees, which can only indicate that the direction of the smell source is within the range of 30 degrees, and the accuracy is poor

This method has the following disadvantages: 1) the fan is used to rotate the odor information to the vicinity of the sensor, which itself will have a greater impact on the distribution of the surrounding odor, which will affect the judgment of the odor source; 2) this method requires a slow servo motor. The ground drives the sensor group to traverse all directions (active), which is slow and inefficient; 3) This method adopts a complex structure with many rotating parts and mechanical parts, which is easy to age and damage

[0007] The above analysis shows that the current odor source detection field lacks a high-precision odor source direction detection device and method that can be applied in a three-dimensional environment and does not require wind direction information.

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