TITLE: Bionic sensing system and characterization of exhaled nitric oxide detection based on canine olfaction
AUTHORS: 时野坪

[DESCRIPTION]
section 1:Design the relative optimal bionic chamber size and the pumping flow capacity of the air pump. The chamber's length, inner diameter, and pump flow capacity are designed, experimented and analyzed.
section 2:The chamber's relatively optimal sieve plate structure is obtained through the design, experiment, and analysis of the number of sieve plates, the number of air holes, and the diameter of air holes in the bionic chamber.
section 3:The response voltages of the NO sensor in three bionic chambers were collected in the same experimental environment.

[STEPS]
SECTION: Bionic chamber design
1. The experimental factors are reasonably designed and investigated through the orthogonal test method, and the level table of orthogonal test factors is established .
SECTION: Bionic chamber design
2. Bionic chambers printed in 3D according to orthogonal design results.
SECTION: Bionic chamber design
3. Under the same conditions, nine experiments were carried out according to the orthogonal experimental design table.
SECTION: Bionic chamber design
4. The sensor's output voltage is collected using a data acquisition card.
SECTION: Bionic chamber design
5. The voltage data is processed by Matlab software by moving the average.
SECTION: Bionic chamber design
6. The stable response signal is averaged.
SECTION: Bionic chamber design
7. The same group experiment was repeated three times.
SECTION: Optimal design of bionic chamber sieve plates
8. The experimental factors are reasonably designed and investigated through the orthogonal test method, and the level table of orthogonal test factors is established .
SECTION: Optimal design of bionic chamber sieve plates
9. Bionic chambers printed in 3D according to orthogonal design results.
SECTION: Optimal design of bionic chamber sieve plates
10. Under the same conditions, nine experiments were carried out according to the orthogonal experimental design table.
SECTION: Optimal design of bionic chamber sieve plates
11. The sensor's output voltage is collected using a data acquisition card.
SECTION: Optimal design of bionic chamber sieve plates
12. The voltage data is processed by Matlab software by moving the average.
13. The stable response signal is averaged
14. The same group experiment was repeated three times.
SECTION: The response voltages of sensor in three bionic chambers
15. Clean the experimental environment with nitrogen before the experiment and ensure that sensors used in each experiment have the same baseline voltage.
SECTION: The response voltages of sensor in three bionic chambers
16. Inject different volumes (0.35ml, 0.7ml, 1.05ml) of NO gas into the closed box. The concentration of NO gas in the closed box after mixing is 15ppb, 30ppb, and 45ppb.
SECTION: The response voltages of sensor in three bionic chambers
17. The sensor was placed in bionic chambers, and the pumping flow capacitywas set to 1L/min.
SECTION: The response voltages of sensor in three bionic chambers
18. The sensor's output voltage is collected using a data acquisition card.
19. The voltage data is processed by Matlab software by moving the average.
20. The stable response signal is averaged.
21. The same group experiment was repeated three times.