Team:UESTC-China/Hardware

description

Overview

In order to combine the project and the progress of the experiment, we designed the community drug recycling bin and the fluorescence detection device in the hardware part.

The community drug recycling bin is used to collect and recycle expired drugs. The initial modular design allows for the recovery of three types of drugs, and the design and implementation of the detection and processing module for ciprofloxacin. Figure 1 and animation show the design and theoretical ideas of a special CIP detection module.

Fig. 1. Expired drugs recycling and degrading device, which we call it Drug Avenger

Fig. 2. Print of the Drug Avenger

The fluorescence detection device is used to specifically detect the CIP concentration, and is assembled by a switching power supply, water pumps, capture card, photodetector, and an external device.

Fig. 3. The fluorescence detection device

Device iteration

In the development process of hardware, our detection device module has been updated three times, and finally realized the design realization of the third generation version.

First generation device

The first generation of detection modules consists of photodetectors, laser sources, STM32 Development board, pumps, filters, lenses, and external devices with an optical path of 90°.

Fig. 4. Light path of the first generation device

Second generation device

The first-generation device is not efficient in fluorescence excitation, and the individual details are unreasonable because of the requirements and cost of 3D printing technology. But the second-generation device optimizes the optical path based on the first-generation device and no longer needs transparent parts. It use 45° angle to enhance the acquisition of fluorescent signals.

Fig. 5. Light path of the second generation device

Third generation device

Through the communication with a doctor, we made up for the shortcomings of the original device in the fixation of the engineering bacteria, and designed the funnel-shaped groove, which is conducive to the accumulation of engineering bacteria and also improve the stability of the detection fluorescent signal.

Fig. 6. The funnel-shaped groove of the third generation device

Finally, we designed a community drug recycling bin and fluorescence detection device based on the third generation of detection module devices. For more detailed information on the design of community drug recycling bins and fluorescence detection devices,

please click on the two pictures below.

Expired drugs recycling and degrading device

Fluorescence detection devices

Open source

In order to make other teams purchase them and improve our hardware, we share important parameters, 3D models and acquisition software below.

Parameters

	Input	Output	Size	Wavelength	Chip	Power	Aperture	Cut-On Wavelength	focal length	diameter
Photodetector			Silicon-based avalanche diode	200~1000nm
Laser				450nm		4.8mw
Development board	12V				STM32F103C8T6
Relay	12V		Four-way optocoupler isolation
Water pump	5V
Filter membrane							0.22μm
Switching power supply	220V/110V	12V/5V
optical filter								500nm
Convex lens									25mm	1 inch

click here to download our 3D model
click here to download our software

Expectation

In the future, we intend to improve the usability and extensiveness of our recycling bins by designing other drug degradation modules. We have reserved some modular designs to make them more convenient and easy to implement. We also hope to optimize the design detection module. Our signals are more stable and efficient, enabling the implementation of the device at a lower cost.