Patient skin temperature monitor over internet of things

doi:10.15406/iratj.2019.05.00171

eISSN: 2574-8092

International Robotics & Automation Journal

Research Article Volume 5 Issue 2

Patient skin temperature monitor over internet of things

Nishesh Yadav

Verify Captcha

Regret for the inconvenience: we are taking measures to prevent fraudulent form submissions by extractors and page crawlers. Please type the correct Captcha word to see email ID.

Research and Development Engineer, Visvesvaraya Technological University, India

Correspondence: Nishesh Yadav, Research and Development Engineer, Visvesvaraya Technological University, Magneti Marelli India Pvt. Ltd., AnantRaj Tech. Park, 101 1st Floor CP-1, Sector 8, IMT Manesar Manesar, Haryana 122051, India, Tel +919620361511

Received: February 23, 2018 | Published: April 1, 2019

Citation: Yadav N. Patient skin temperature monitor over internet of things. Int Rob Auto J. 2019;5(2):43-47. DOI: 10.15406/iratj.2019.05.00171

Download PDF

Abstract

This paper emphasizes more on the technical details of monitoring Patient’s Core Body Temperature continuously without any intervention. This can be done by measuring Patient’s Skin (Surface) temperature by attaching temperature sensing probe to patient’s skin. The work is basically realized based on Internet - Of - Things (IoT) over Wi-Fi using ESP8266–ESP12 Module which allows user to monitor patient Skin Temperature Online and also give indication of Hypothermia and Hyperthermia Offline for alerting patient attendant.

Keywords: ESP12, body core temperature, arduino 1.6.5 IDE, temperature sensors

Introduction

Skin temperature monitoring is not the accurate way for measuring Core Body Temperature, as it varies according to ambient temperature, but still gives a fair estimate of Body Core Temperature. Body temperature can be measured from many locations on your body. The mouth, ear, armpit, and rectum are the most commonly used places. Temperature can also be measured on your forehead. An abnormally low body temperature (hypothermia) can be serious, even life-threatening. Low body temperature may occur from cold exposure, shock, alcohol or drug abuse. Keeping in mind the importance of measuring the body temperature, we need to be precise over this activity.¹

Designated PCB is designed internally and fabricated and the temperature sensor is incorporated in it. Conversion of Body temperature from the raw analog values are handled properly using DSP algorithm so that proper sampling is done and data fetched is correct. Body Temperature is remotely sent over internet falling under the category of Internet of Things-IOT. For this real-time scenario we take one digital temperature sensor, interfaced to a Wi-Fi module to send live data to a remote location anywhere in the world over internet.^2,3

Platform overview and specifications

This Device is designed around ESP8266–ESP12 Wi-Fi Module operating on 3.3V power Supply and programmed through Arduino IDE. (Figures 1‒4)

Figure1 Wi-Fi module PCB overview.

Figure 2 Wi-Fi module.

Figure 3 Wi-Fi module pin overview.

Figure 4 Controller overview.

Component description

Power Supply & other related accessories:

One 230-5 V DC adapter
One -Regulator IC LM-1117 (For 3.3v regulated output)
One micro USB connector
Two Capacitors (10 micro farad )
One Red LED with 680 Ohm resistor to indicate 3.3V regulator output OK.

Switches:

One Buzzer Mute switch with 10k ohm resistance and 0.1 µF ceramic Capacitor to avoid debouncing.
One Reset switch with 10k ohm resistance and 0.1 µF ceramic Capacitor to avoid debouncing.

ESP programming connector:

ESP programmed with Arduino IDE using UART serial Communication on 3.3v logic.

ESP8266 Module: ESP8266 ESP12 is 16 pin Module with one ADC pin.

Display & Alarm:

One GREEN LED with 680 Ohm resistor to indicate Wi-Fi Connected/Normal Temperature.
One RED LED with 680 Ohm resistor to indicate Hyperthermia.
One YELLOW LED with 680 Ohm resistor to indicate Hypothermia.
Buzzer to indicate abnormal temperature triggered with BC547 Transistor.

Temperature sensor LM235 IC:

Figure 5

Figure 5 Temperature sensor overview.

Block diagram:

Figure 6

Figure 6 System overview.

Software implementation flow:

Figure 7

Figure 7 Implementation flow.

On Power ON this device will try to connect to the configured Wi-Fi network with fixed Local IP 192.168.1.150 and service Port number 80. If connected successfully the GREEN Led will initially blink 3 times before going stable; otherwise device will operate in Offline Mode (Table 1).

Condition	Range	Green	Red	Yellow	Buzzer
After 2mins of reading	Centigrade	LED	LED	LED
Normal skin temperature	33 to 35°C	On	Off	Off	Off
Hypothermia	< 32.5°C	Off	Off	On	Beep
Hyperthermia	>35.5°C	Off	On	Off	Beep

Table 1 It shows the range when device is connected in wi-fi network

In Online Mode when device is connected with Wi-Fi network, the GREEN LED will start blinking when data is requested from device. This device acts as a webserver in online mode and can be accessed directly through any web browser with IP address or configured DNS name (nsittemp.ddns.net).^4‒6

Limitation for estimating core body temperature by measuring skin temperature:

Figure 8, 9