Team:UESTC-China/Hardware

description

Overview

In order to achieve the application of our engineered bactria in practise, we designed the expired drugs recycling and degrading device(Drug Avenger) and the fluorescence detection device in the hardware part.

Expired drugs recycling and degrading device(Drug Avenger) was used to recycle expired drugs. The initial modular design allowed for the recovery of three types of drugs, and we designed and implementated the detection and processing module for ciprofloxacin. Fig. 2. and animation show the design and theoretical concept 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 function module

The fluorescence detection device was used to specifically detect the CIP concentration, and was 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 had been updated three iderations, and finally the third generation version was designed and realized.

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

During the further discussion with several professiors, we found that the first-generation device was not efficient in fluorescence excitation, and some details were unreasonable because of the requirements and cost of 3D printing technology. But the second-generation device optimized the optical path based on the first-generation device and need no more transparent parts. A new optical path of 45° angle was used to enhance fluorescence excitation efficiency.

Fig. 5. Light path of the second generation device

Third generation device

We tried the second generation device and found that it was not stable enough to detect the weak fluorescence. Under the guidance of Dr.Gul, we fixed the shortcomings of the original device in the fixation of the engineering bacteria, and designed the funnel-shaped groove, which was 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 buttons below.

Expired drugs recycling and degrading device

Fluorescence detection devices

Open source

In order to make other teams understand it easily and improve hardware together, we share important parameters, 3D models and acquisition software below.

Parameters

	Input	Output	Size	Wavelength	Chip	Power	Aperture	Cut-On Wavelength	focal length	diameter	ADC
Photodetector			Silicon-based avalanche diode	200~1000nm
Laser				450nm		4.8mw
Development board	12V				STM32F103C8T6						ADS1256
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

designing other drug degradation modules. We have reserved some modular designs to make them much easier and more convenient to implement. We also hope to optimize the design detection module. By doing so, we can get more stable and efficient signals and implementate the device at a lower cost.