Design and Verification of Human Metabolic Measurement System Based on STM32 / 中国医疗器械杂志

A high-precision human metabolic measurement system is designed. The system uses STM32F103 as the main control chip to acquire oxygen, carbon dioxide and flow signals to calculate four quantitative indicators: oxygen consumption(VO2), carbon dioxide production(VCO2), respiratory entropy(RQ) and resting energy metabolism(REE), and finally uses an upper computer to display the calculation results.In this paper, the signal acquisition circuit design was carried out for the oxygen sensor, carbon dioxide sensor and flow sensor, and the validity of the device was verified with the American machine MGCDiagnositcs using Bland-Altman analysis method, and the results showed that the four parameters of VO2,VCO2, RQ and REE of both devices fell in the agreement interval of more than 95%. The device thus provides accurate metabolic measurements and offers an effective tool for the field of general health and clinical nutrition support in China.

Development of the Extraction Reference Point Beam Diagnostic System for Proton Medical Accelerator / 中国医疗器械杂志

er to detect the beam quality of the SC200 superconducting cyclotron,measure the beam at the extraction reference and the acceptance of the accelerator is realized.This article mainly introduces the design that use the scintillation screen at the extraction reference to measure the beam profile,position and use the Faraday cup to measure the current intensity with 2.5 level accuracy.The remoted controlling of probes and the acquisition and processing of signal based on LabVIEW and PLC.

Research progress on fabric electrode technologies for electrocardiogram signal acquisition / 生物医学工程学杂志

In recent years, wearable devices grew up gradually and developed increasingly. Aiming at the problems of skin sensibility and the change of electrode impedance of Ag/AgCl electrode in the process of long-term electrocardiogram (ECG) signal monitoring and acquisition, this paper discussed in detail a new sensor technology-fabric electrode, which is used for ECG signal acquisition. First, the concept and advantages of fabric electrode were introduced, and then the common substrate materials and conductive materials for fabric electrode were discussed and evaluated. Next, we analyzed the advantages and disadvantages from the aspect of textile structure, putting forward the evaluation system of fabric electrode. Finally, the deficiencies of fabric electrode were analyzed, and the development prospects and directions were prospected.

Preliminary study on touch screen VDT operation musculoskeletal injuries and design implications / 医疗卫生装备

Objective To analyze the musculoskeletal injuries related to touch screen VDT operation and design implications.Methods The effects of touch screen size and angles on touch-screen-VDT-operation-related muscle load and fatigue were explored using thorough experiment and EMG acquisition method,and the independent variables included the size and angle and the dependant variables consisted of the load and fatigue of flexor digitorum superficialis (FDS),extensor digitorum communis (EDC),extensor carpi radialis (ECR) and extensor carpi ulnaris (ECU).Results No significant difference was found with regard to pointing success rate and accuracy at all screen sizes and angles levels.FDS and EDC MVC％ increased with increasing touch screen size at all levels of angles.FDS MVC％ decreased while EDC MVC％ increased with inclining angles at all levels of touch screen sizes.All measured muscles' MF did not decrease with time.Conclusion This study helps to provide basis for the optimization of equipment design,reduce exposure to musculoskeletal injuries risks and implement primary prevention.

Design of intelligent detection system to individual life signs / 中国医学装备

Objective: To achieve intelligent access to normal training or individual soldier signs information during the war, establish individual soldier health intelligent interactive regulation and health system platform of IOT, realized digitalization, information management mode. Methods: Using the communication network, intelligent call, vital signs monitoring technology, to design intelligent signs monitoring system. Results:This system is mainly for the automatic sense of individual signs in the training or war, to understand the individual activity, get the sign data, which can send information through a call or intelligent system, based on the identification and location, medical personnel to care and treatment in the shortest time, construction of intelligent information. Conclusion: Through the use of intelligent detection system to Individual life signs in training or in wartime, the system can always grasp of individual soldier signs, and realizing a complete coverage of all of the intelligent health monitoring system, to provide effective guarantee for wartime workers health.

Design of new multi-channel EEG signal acquisition system / 医疗卫生装备

A new multi-channel EEG signal acquisition system,which adopts Cypress's EZ-USB FX2 series USB as its micro-controller,is presented in this paper.The system employs AD620 and OP07 at the pre-amplifying stage and the following two amplifying stages respectively.Universal Series Bus(USB) technology is used to realize the real-time recording,displaying and tele-monitoring of EEG signal,which can also be stored in CF card after compression.The USB software developing tool is WinDriver.