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Industrial Research And Consultancy Centre
Patent
Method for Preparation of Multimodal Sensor
Abstract

A multitasking sensor is proposed with a robust and feasible design approach to achieve high sensitivity across various applications. This sensor is illustrated for three distinct biomedical applications: pressure, tactile motion, and temperature sensing. The choice of elastomer is crucial, ensuring transparency across all operations and stability over a wide temperature range. The simplicity in design enhances its ergonomics for end-user product strategy. The sensor employs an ionic liquid as the sensing element, using a synthesis protocol that ensures high yield and room ambient handling, making the sensor indispensable.

Figure (1) (a) - (c) illustrates a process of injecting of the ionic liquid into a micro channel

Problem Statement

Resistive-based sensors have garnered significant attention as emerging technologies in medical monitoring, prosthetics, and arthritis applications. Despite successful fabrication and demonstration of sensors with good sensitivity, there remains a strong demand for accurate, flexible, and low-cost sensing devices. Major technical limitations, such as low sensitivity, large hysteresis, and poor reversibility, continue to challenge current sensors, necessitating further efforts to address these issues.

Uniqueness of the Solution
  • Highly shape conformable with optimal performance delivery. 
  • Simplest and most feasible design. 
  • Provides motion-dependent distinct electrical signals with minimal hysteresis. 
  • Transparent sensor capable of sensing multiple diverse entities such as temperature, strain, and tactile motion with a single element. 
  • Utilizes ionic liquid as the sensing element, with a synthesis protocol ensuring high yield and room ambient handling.
Prototype Details

The invention describes a versatile sensor based on a single element capable of generating distinct outputs for various interactions, enhancing its performance and applicability. The sensor utilizes an ionic liquid injected into a microchannel, where a modified hairpin track design improves sensitivity for pressure sensing. This compact modification enhances sensor performance significantly. The process begins with synthesizing the ionic liquid, followed by designing the sensor and injecting the liquid into the microchannel, ensuring a systematic and feasible approach to achieve multifunctional sensing capabilities. The synthesized ionic liquid exhibits unique temperature sensitivity not found in commercial counterparts. Laboratory tests across three different applications validate the sensor's versatility and demonstrate its effectiveness in diverse settings with a unified design approach.

Current Status of Technology

The patent for this technology has been officially granted

Technology readiness level

5

Societal Impact

The invention enhances medical monitoring capabilities by providing accurate and reliable data for prosthetics and arthritis applications. This leads to advancements in heatlthcare while also lowering the cost and making it more accessible and affordable to everyone.

Applications or Domain

The invention has major applications in domain of Sensors, Wearable devices, Healthcare, Internet of things and the biomedical industry.

Geography of IP

Type of IP

Application Number

201621035640

Filing Date
Grant Number

412288

Grant Date
Assignee(s)
Indian Institute of Technology Bombay

IP Themes

**This IP is owned by IIT Bombay**