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Infusion Level Monitor Using Capacitive Touch Sensing

Overview

Description

This is an infusion level monitoring solution to detect the remaining amount of liquid using low-power consumption and capacitive touch sensors. Users can monitor the remaining liquid amount via Bluetooth® Low Energy (LE) or Wi-Fi in a remote location (e.g., a nurse station). This solution can be applied to not only infusion but also to various applications with liquid tanks.

System Benefits​:

  • Capacitive touch sensing and system control are realized using the RX140 32-bit MCU.
  • The simple configuration of only the electrodes enables the detection of the remaining amount of liquid, which contributes to a reduction in BOM cost.
  • Low power consumption Wi-Fi + Bluetooth LE module and RX140 MCU for long-term operation, ideal for battery-powered applications.

Comparison

Applications

  • Infusion level monitor
  • Liquid level monitor for various bottles and tanks

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4:3 ratio Option B: Stationary Equipment Option B: Stationary Equipment Option B: Stationary Equipment Sheet.1 Sheet.2 Sheet.3 Sheet.4 JP208 JP208 JP208 Option A: Portable Equipment Option A: Portable Equipment Option A: Portable Equipment Buck-Boost Regulator Buck-Boost Regulator Buck-Boost Regulator Battery 1-Cell Sheet.10 Sheet.11 Line 1pt.1552 Line 1pt.1583 Ground - Earth Sheet.15 Sheet.16 Sheet.17 Sheet.18 Sheet.19 Sheet.20 Sheet.21 Sheet.22 3V 3V 3V 5V 5V 5V 3V 3V 3V Buck Regulator Buck Regulator Buck Regulator Input Input.30 Input.31 Liquid Flow Sensor Liquid Flow Sensor Liquid Flow Sensor Air Quality Sensor Air Quality Sensor Air Quality Sensor Humidity & Temperature Sensor Humidity & Temperature Sensor Humidity & Temperature Sensor Electrode Electrode Electrode Wi-Fi Bluetooth Module Wi-Fi Bluetooth Module Wi-Fi Bluetooth Module LCD Driver LCD Driver LCD Driver D Amp D Amp D Amp Speaker speaker_8_ Sheet.57 Sheet.58 Sheet.59 Sheet.60 LCD/LED Segment Display Sheet.90 Sheet.91 Sheet.92 Sheet.93 Sheet.94 Sheet.95 Sheet.96 Sheet.97 Sheet.98 Sheet.99 Sheet.100 Sheet.101 Sheet.102 Sheet.103 Sheet.104 Sheet.105 Sheet.106 Sheet.107 Sheet.108 Sheet.109 Sheet.110 Sheet.111 Sheet.112 Sheet.113 Sheet.114 Sheet.115 Sheet.116 Sheet.117 Sheet.118 Sheet.119 ON ON Sheet.120 OFF OFF Sheet.121 Sheet.122 Sheet.123 Sheet.124 Sheet.125 Sheet.126 Sheet.127 Sheet.128 Tablet Sheet.130 Sheet.131 Sheet.132 Sheet.133 Sheet.134 Media Player XMLID_35_ Sheet.137 Sheet.138 LCD Monitor Sheet.140 Sheet.141 Antenna Sheet.143 Sheet.144 Sheet.145 Sheet.146 Sheet.147 Sheet.148 Sheet.149 Sheet.150 Sheet.151 Sheet.153 Sheet.154 Sheet.155 Sheet.156 Sheet.157 Sheet.158 Sheet.159 Sheet.160 Sheet.161 Sheet.162 Sheet.163 Sheet.164 Sheet.165 Sheet.166 Sheet.167 Sheet.168 Sheet.169 Sheet.170 Sheet.171 Sheet.172 Sheet.173 Sheet.174 Sheet.175 Sheet.176 Sheet.177 Sheet.178 Sheet.179 Sheet.180 AC Adapter AC Adapter AC Adapter 5V 5V 5V 5V <1.4A 5V <1.4A 5V <1.4A 3V <1.2A 3V <1.2A 3V <1.2A Max, 36 Electrodes Max, 36 Electrodes Max, 36 Electrodes *Detect the change of capacitance by liquid level Detect the change of capacitance by liquid level Detect the change of capacitance by liquid level *CTSU2: Capacitive Touch Sensing Unit 2 *CTSU2: Capacitive Touch Sensing Unit 2 *CTSU2: Capacitive Touch Sensing Unit 2 PC/Tablet/Smartphone PC/Tablet/Smartphone PC/Tablet/Smartphone LCD LCD LCD LED LED LED Connector 1.178 Connector 1.178.194 5V 5V 5V 3V 3V 3V Connector 1.178.199 Connector 1.178.200 Connector 1.178.201 Connector 1.178.202 Connector 1.178.203 Connector 1.178.204 LED Sheet.210 Sheet.211 Sheet.212 Sheet.213 Sheet.214 Sheet.215 Sheet.216 Sheet.217 Sheet.218 Sheet.219 Connector 1.178.220 Sheet.221 MCU MCU MCU CTSU2* CTSU2* CTSU2* I2C I2C I2C UART UART UART I2C I2C I2C PWM PWM PWM GPIO GPIO GPIO
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