Development Of Portable Biochemical Spectral Analysis Device Based On Smartphone

With the advancement of today's social technologies and the increasing popularity of smartphones,more than 2 billion people worldwide will have smartphones,which are expected to grow further by 2020,covering approximately 80% of the world's population.In addition to the traditional communication functions,smartphones have a variety of sensors,especially photoelectric sensors,acceleration sensors,GPS,etc.,which make them extremely rich in functions.In scientific experiments,chemiluminescence,fluorescence and other luminescence phenomena are common,such as the redox reaction of potassium permanganate and morphine,which produce chemiluminescence.The spectrum of visible light after dispersion can be divided into red,orange,yellow,green,blue,and purple.That is to say,the seven colors are mixed into visible light,and the visible light is also a kind of electromagnetic wave,and its wavelength ranges from 380 nm to760 nm.In general,identifying a substance and determining its chemical composition and relative content are complex,but we can identify the substance based on the luminescence spectrum of the substance.This technique is called spectral analysis technology.Using this spectral analysis technique,we can The measured substance is quantitatively measured.Because of the portability of mobile phones,the use of illuminating phenomena combined with smart phones has become a hot trend in analytical testing.This topic combines the spectrum analysis technology of visible light with a smart phone.Based on the camera function of the smartphone camera,we can obtain the wavelength of the spectrum of the subject,and directly use the mobile APP to use for the luminescence dynamics analysis.The portable biochemical sensing device based on smart phone not only includes the convenience and speed of the mobile phone,but also satisfies the functionality of test analysis.Under the aging of the world,this convenient and quick detection method has a great application.Prospects can be applied to medical testing,heavy metal testing and so on.The portable biochemical spectrum analysis device based on smart phone is mainlydivided into three parts.The first part is the circuit part of the excitation light source,and the circuit is mainly the driving circuit of the excitation light.The second part is the auxiliary detection device.The main function of the auxiliary detection device is to assist the mobile phone to collect images or videos with bright intensity,the light protection storage of the reaction reagents and the circuit to provide the excitation light device through the optical fiber.The third part is an image detection APP based on smartphone and spectral analysis and a video detection APP based on smart phone and spectrum analysis.The detection APP is developed based on Google's Android system,and the function is to perform data analysis and detection.One,The driving circuit for exciting lightThe excitation light driving circuit is divided into four parts.The first part of the single-chip microcomputer,the single-chip microcomputer adopts STC15W408 AS,STC15W408AS can fully meet the functional requirements of the circuit,and the chip is mature and stable.The second part is the D/A converter.The D/A converter is made of DAC8552 produced by Texas Instruments.The DAC8552 is a 16-bit dual-channel voltage output digital-to-analog converter.The low-power characteristics of the device during normal operation make it It is ideal for portable power supplies and other low power applications.The third part is the LED driver chip.The driver is MAX1916.The MAX1916 is a stable,low-dropout,high-efficiency driver chip produced by MaximIntegrated.The fourth part is the Bluetooth module,and the Bluetooth is the HC-05 module.Two,auxiliary detection deviceThe detection device is mainly divided into three parts,a light-shielding box,a circuit board box,and a mobile phone fixing device.The light-shielding box is used to store reagents,and the whole light-shielding box is made of oxidized aluminum alloy with good shading performance.The circuit board provides an excitation light source to the light-shielding box through the optical fiber,and the mobile phone uses the self-contained camera to obtain the dynamic video of the luminous intensity.Three,detection based on smart phone and spectrum analysis APPThe detection APP in the portable biochemical spectrum analysis device based on smart phone is developed by Android integrated development tool Android Studio.Android Studiois developed and launched by Google Inc.,because Android Studio provides integrated Android development tools for development and debugging,so It is very convenient and quick to use.The detection APP of the portable biochemical spectrum analyzer based on smart phone is divided into two.The first one is the image detection APP based on the portable biochemical spectrum analyzer of the smartphone,and the second is the video of the portable biochemical spectrum analysis device based on the smartphone.Detect APP.The image detection APP of the first smart phone-based portable biochemical spectrum analyzer uses an auxiliary device to obtain a luminescent image and analyze its wavelength to obtain a data relationship between the wavelength and the reaction concentration,and then uses this relationship to obtain an unknown concentration.The second video detection APP of the portable biochemical spectrum analysis device based on the smart phone uses the auxiliary device to obtain the illuminating video and directly draws the kinetic curve of the illuminating brightness of the illuminating phenomenon and displays it on the APP interface.