IJSRD - International Journal for Scientific Research & Development| Vol. 3, Issue 01, 2015 | ISSN (online): 2321-0613 All rights reserved by www.ijsrd.com 713 PC Based Monitoring of Human Biological Signals Using LabVIEW S.Anu Roopa Devi 1 P.Mahalakshmi 2 R.Keerthana 3 S.Rathna Prabha 4 1,2,3 Student 4 Assistant Professor 1,2,3,4 Department of Biomedical Instrumentation 1,2,3,4 Saranathan College of Engineering, Trichy, Tamilnadu, India Abstract— PC based monitoring of human biological signals using LabVIEW is one of the indirect methods of measuring the human biological parameters. Biological parameters are the one in which determines whether the person is in normal condition or in abnormal condition. Human body temperature, pulse rate, blood pressure and respiration rate are some of the human biological parameters which are used to determine the human body health condition. The parameters or the signals of the human body are measured from the external surface of the body in which it is known as the indirect method. The sensors used are LM 35, XD 58C, 6820 to measure temperature, pulse and blood pressure signals. These signals are then interfaced with LabVIEW simulator through myRIO. The obtained signals will be compared with normal parameters and if any abnormality occurs then it will shows the output. Key words: LabVIEW, myRIO, sensors, temperature, blood pressure, pulse rate I. INTRODUCTION The monitoring of human biological signals can be done in ICU’s, Operation theatre etc., because these all are the areas where a patient as an immediate reaction to acute events. In which on those days the abnormal condition of the patient’s cannot be easily determined. If and only if, a nurse should always be there for each and every patient to monitor the signal. In order to overcome the situation to have many nurses in an hospital an easy approach of monitoring the human biological signals can be done with the help of LabVIEW which is an easy understandable language and easy to program. Using the LabVIEW the program implementation can be done to determine the normal and abnormal of a person using the appropriate sensor. II. HARDWARE DESCRIPTION The hardware that has being used in this paper is that the temperature sensor(LM 35), the pulse sensor (XD58C AMPED), the blood pressure sensor (1620 pressure sensor) and myRIO. A. Temperature Sensor (LM 35): Fig. 1: LM 35 The characteristics of temperature sensor are that in which it is a precision integrated circuit temperature devices with an output voltage linearly proportional to the centigrade temperature. The feature of LM 35 is that in which it works at an operating voltage of about 4V to 3oV. The sensor is being calibrated directly in Celsius and also in linear of about +10mV/ o C scale factor. Rated for full of about -55 o C to 150 o C. It is also suitable for remote application. The sensor is of low cost due to wafer level trimming. It has less than 60 μA current drains and it also has non-impedance, it also has a low self-heating, 0.08 o C in still air and it also has The above shown fig is LM 35. In which the LM 35 consists of 3 pin where the first pin is for Vcc, the second pin is for output and the third pin is for GND. The input voltage (Vcc) will be in the form of about 5V. The connection will be given as shown in fig 2. Fig. 2: LM 35 circuit connection Using this circuit connection the temperature of human body is being determined. The obtained output will be in the form of millivolt but the temperature will be obtained in the form of o C and also in farenheit to obtain the human body temperature. B. Pulse Sensor (XD58 C (Amped)): The pulse sensor being used in this paper is XD58 C(AMPED). Pulse sensor is used to test heart rate sensors, students, artists, athletes, creators, games or mobile terminal developers can develop heart-related and interactive works. Sensor can be worn on the finger or earlobe, It also has an open-source app program, you can put your real-time heart rate displayed by the graph. In essence, a heart rate sensor integrated optical amplifier and noise elimination circuit. 3V or 5V power supply. The specification of pulse sensor is of colour of the sensor is red, the material being made is FR4, the power supply being used is of about 3V-5V, magnification of 330, wavelength is of about 609 NM. Fig. 3: XD 58C (AMPED) The above shown fig is the sensor being used in this paper. XD58 C sensor is used to obtain the pulse in direct form. The direct form is obtained is by connecting the sensor with myRIO. The circuit diagram is being implemented as which consists of about 3 pins as the first