针对市场上现存的脉象仪采集手段单一、参数提取过少、保存数据不便等不足,基于ROHM公司开发的光电脉搏传感器BH1790GLC,结合arduino uno单片机开发平台以及LabVIEW平台,开发了一种新型的脉搏波测量系统。此系统利用BH1790GLC测量原始的脉搏波信号,通过arduino uno采集信号数据,在LabVIEW平台利用小波信号处理方法对采集的信号进行滤波处理,提取与人体脉搏相关的信号,实现了高精度的脉搏波的测量。结果表明,此系统对脉搏数测量误差为±1BPM(Beat Per Minute,每分钟节拍数的单位)。此系统采用的是光电传感采集的方式,利用虚拟仪器平台处理保存数据,实现了高精度的测量,这对心血管疾病的临床检测具有很高的应用价值。
This paper presents the design and performance analysis of an efficient solar energy harvesting single axis sun tracking system employing dynamic offset parabolic mirrored reflector dish to increase the efficiency of ...
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ISBN:
(纸本)9781467393393
This paper presents the design and performance analysis of an efficient solar energy harvesting single axis sun tracking system employing dynamic offset parabolic mirrored reflector dish to increase the efficiency of solar energy harvesting system. The performance of proposed solar energy harvesting system has been analyzed by comparing the output of proposed system with static solar panel and solar panel with static mirrored reflector system. It has been observed that proposed system is capable of harvesting more energy than static solar panel system and solar panel with static offset mirrored parabolic dish. The parabolic mirrored reflector dish is capable of reflecting the light radiations and focusing the reflected light at its focal point where solar panel has been placed to harvest the light energy efficiently. The clocked tracking system has been used to rotate the dish in the direction of motion of sun. The arduino uno controller has been employed to rotate the dish by step angle of 6.25 degree at periodic interval of 30 minutes during daytime between 6 AM to 6 PM. The energy harvesting system is autonomously operating the motor driven dish by harnessing a portion of harvested solar energy which is stored in rechargeable lead acid battery. The proposed solar energy harvesting system is capable of generating average output voltage of 7.822 volts and 6.144 mA. The proposed system is 81 percent more efficient than static solar panel system and 48.26 percent more efficient than solar panel with static reflector system. The proposed energy harvesting system can be efficiently employed for various applications like water heating, etc.
One of the increasing public concerns is human health. It is very important to maintain good health. Some things will get upset if one gets sick and for this reason people are ready to spend money. This paper proposes...
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ISBN:
(纸本)9781538639016
One of the increasing public concerns is human health. It is very important to maintain good health. Some things will get upset if one gets sick and for this reason people are ready to spend money. This paper proposes an integrated, portable & convenient solution to monitor vital health parameters like body temperature & heart rate on a regular day to day basis. The device is designed using sensors to measure these parameters non-invasively. These sensors are connected to microcontroller board arduino uno which transmits data wirelessly via Bluetooth on user's android enabled smartphone. The results obtained are stored in the designed app, over a period of time. The patient details with the readings of the different parameters is transferred to the cloud. After each measurement, the results are compared with the threshold for each parameter. If the results are not as desired, then a summary with confirmed symptoms is displayed in the app. This summary can be uploaded on the cloud for consulting a remote doctor.
Limited storage capacity of battery constricts the usefulness of most high technology devices such as cell phones, computers, and sensors. In the future, these limitations will become more pronounced as the demand for...
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ISBN:
(纸本)9781538617045
Limited storage capacity of battery constricts the usefulness of most high technology devices such as cell phones, computers, and sensors. In the future, these limitations will become more pronounced as the demand for wireless power outpaces battery development which is already at its best. Thus, we need to come up with new power generation techniques which will be used as an energy source for the next generation of wearable computers, wireless sensors, and autonomous systems. Piezoelectric materials nowadays play a major role in the so called smart materials because of their ability to couple mechanical and electrical properties. The direct piezoelectric effect is that these materials, when subjected to mechanical stress, generate an electric charge proportional to that stress. The inverse piezoelectric effect is that these materials become strained when an electric field is applied, the strain again being proportional to the applied field. Piezoelectric materials are generally used as sensors and actuators. Piezoelectric energy generation at the sub-micron-scale have infinite scope for research and application in upcoming technologies. This paper presents a theoretical and experimental analysis to generate non-conventional energy using piezoelectric crystals to power wearable devices.
The most effective leg processes resembling a spider leg are currently, Joe Klan system, and the Jansen mechanism, which also resembles a human leg. Owing to more practicality and effectiveness, Joe Klan's approac...
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The most effective leg processes resembling a spider leg are currently, Joe Klan system, and the Jansen mechanism, which also resembles a human leg. Owing to more practicality and effectiveness, Joe Klan's approach was prioritized. The wheel has been the fundamental element used in all forms of mechanical conveyance since its inception in the Stone Age. However, because of short-term development effects on things like small staircases, obstacles, agricultural regions, and steep, jagged rock piles, wheels have always had significant downsides. Designers contemplate on animal and human legs as a solution to these issues. The present study's major objective is to develop a replacement for the purpose of wheels utilized for seeding, spraying, and removing the grass in order to address the problems which move through agricultural areas. In addition to assemble the pieces that are already on the market, the robot may be remotely directed to cut the grass in an agricultural region.
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