Connect the wires of the fsr sensor to multimeter without applying any force on the surface of the force sensing resistor the resistance will be very high. Fsrs are also known as pressure sensing, force sensitive resistors, etc. A led pressure display and a toggle switch circuit is covered. How to use a force sensitive resistor arduino tutorial. Checking the datasheet will always illuminate any differences. Sensor overallsensorseries datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other semiconductors. In the simplest layout configuration singlezone, an fsr is a twoterminal device that can essentially be treated as a variable resistor whose value is controlled by applied force. Matlab arduino tutorial 16 force sensitive resistor fsr. This graph indicates approximately the resistance of the sensor at different force measurements. This content and associated text is in no way sponsored by or affiliated with any. Force sensor hokuriku ce specifications are subject to change without noti.
High durability, life cycle 1 million cycles or more outline dimension 3 unit specification rating. Capable of microforce detection with high sensitivity, high precision. In an electrical circuit, this sensor will act as a variable resistor, where the change in resistance is inversely proportional to the force. The product information contained in this document is designed to provide general information and guidelines only and must not be used as an implied contract with interlink electronics, inc. Please follow the instructions below to calibrate your sensor and to convert the acquired data. Force sensing resistor fsr arduino tutorial 3 examples. These stats are specifically for the interlink 402, but nearly all fsrs will be similar. When there is no pressure, the sensor looks like an infinite resistor open circuit, as the pressure increases, the resistance goes down.
A force sensing resistor is a material whose resistance changes when a force, pressure or mechanical stress is applied. This table indicates the approximate analog voltage. Fsr resistors include square, circle, and strip designs with adhesive backing for easy attachment. You can use this program to control all kinds of other functions, in this case to switch on and off an led. They are also known as force sensitive resistor and are sometimes referred to by the initialism fsr. Fsrs are sensors that allow you to detect physical pressure, squeezing and weight. Pdf novel applications of force sensing resistors in. Note that force is not measured in grams and what they really mean is newtons 100. This is a force sensitive resistor with a round, 0.
These innovative sensors provide an inverse change in resistance in response to an increasedecrease in applied force. Round forcesensitive resistor fsr interlink 402 id. This video demonstrates how to calibrate and visualize a force sensitive resistor fsr using the arduino uno board and matlab. Checking the datasheet will always illuminate any differences how to measure force. If force is applied to its surface, then the resistance starts decreasing. Force sensitive resistor products sparkfun electronics. A force sensing resistor fsr is a variable resistor, constructed of several thin flexible layers, that varies in resistance as pressure is applied and released. Sen09376 force sensing resistor 3d cad model library. Fss020wnsr fss series low profile force sensor, 0 n to 20 n force range, tape and reel packaging fss020wnst fss series low profile force sensor, 0 n to 20 n force range, standard tube packaging.
Force sensing resistor how it works and its applications. Force sensing resistors can be designed as singlepoint force sensors, or in a matrix array form, allowing the user to capture pressure distribution over a given area. Force sensing resistors are also known as force sensitive resistors or force sensors. The force range can be extended by reducing the drive voltage, v t, or the resistance value of the feedback resistor, r f. You will have to add a led with a resistor to the circuit, which is shown in the diagram below. Datasheet force sensors fsa series, compensatedamplified description the fsa series are piezoresistivebased force sensors offering a ratiometric analog or digital output for reading force over the specified full scale force span and temperature range. Just fill out the form and browse for the specific information you want. Fsr 400 series datasheet interlink electronics digikey. Novel applications of force sensing resistors in healthcare technologies. The transistor q1 is chosen to match the required current specification for the relay. They are fully calibrated and temperature compensated for sensor offset, sensitivity. One of the first uses of our patented thin film force sensing resistor fsr. Datasheet search engine for electronic components and semiconductors. Sparkfun sensor kit out of stock dev16156 with everything included in this sensor kit, youll be able to sense gesture, humidity, temperature, motion, touch, sound, al.
The modules use force sensing resistor technology and measurement firmware in a fourzone sensor or 4wire resistive touchpad configuration along with a microcontroller to provide pressuresensitive cursor direction and speed control in a durable and easytointegrate form factor. Standard and custom force sensitive resistors tekscan. Force dependant on actuation interface, mechanics, touch location, and measurement electronics. Flexiforce force sensors can measure force between almost any two surfaces and are durable enough to stand up to most environments. Force sensing resistors, or fsrs, are robust polymer thick film ptf devices that exhibit a decrease in resistance with increase in force applied to the surface of. They are also known as force sensitive resistor and are sometimes referred to by the initialism fsr wikimedia commons has media related to force. Please follow the instructions below to calibrate your sensor. Examples of different force sensitive resistor technologies. Forcesensing linear potentiometers fslps from interlink electronics are passive components with resistances that depend on the magnitude and location of the force applied to the strip, making it easy to add novel touch interfaces or tactile sensors to your project. Conversely, the sensitivity can be increased for measurement of lower forces by increasing v t or r f. Download copies of our datasheets for all of our standard products. Launched in 1985, interlink electronics is the worlds leading innovator of cost effective polymeric force sensors. The product information contained in this document is. Many force measurement applications call for an fsr force sensitive resistor that is ultrathin, accurate, costeffective, and customizable.
A low cost force sensing resistor tailor made for the grasper tip was designed and fabricated for quantifying the. Apr 24, 2020 how to measure force pressure with an fsr as weve said, the fsrs resistance changes as more pressure is applied. Force sensitive resistor adapter while the fsr terminals are breadboardcompatible, weve found that it may be loose in the breadboard. Fsr01ce datasheet12 pages ohmite force sensing resistor. Force sensing resistors fsrs are resistive sensors exhibiting varying. Mechanical specifications electrical specifications. In an electrical circuit, this sensor will act as a variable resistor, where the change in resistance is inversely proportional to the force applied. This means that it will map the input voltage between 0 and 5 v into integer values between 0 and 1023.
In this example you will be using the fsr sensor as a toggle switch. Fsr 406 sensing resistor interlink electronics digikey. Choose the sensor that best fits the geometry of your application. Fsr 400 series square force sensing resistor description interlink electronics fsrtm 400 series is part of the single zone force sensing resistortm family.
Today, with over 20 years of industryleading experience, interlink electronics continues to. Force sensing resistor can be defined as a special type of resistor whose resistance can be varied by varying the force or pressure applied to it. Resistance accuracy varies by sensor model, but is generally limited to a ballpark figure around. The product information contained in this document is designed to provide general information and guidelines only and must not be. They are fully calibrated and temperature compensated for sensor. The recommended pullup resistor value depends on the system setup capacitance of the circuit or cable and bus clock frequency. Join the grabcad community today to gain access and download. Fsr features a special thick film formulation printed and adhered to a flexible substrate. Fsr force sensing resistor sensor allow you to detect physical pressure, squeezing and weight. The fsr sensor is not a strain gauge, load cell or pressure transducer. This ohmite resistor series includes a pigtail extending on one end with an industrystandard connector. Of course the force will change dramatically during the stride or activity, but the force sensor will only measure whatever portion is actually applied to the sensing area. Force sensitive resistor fsr sensor data sheet biosignals plux.
How to measure force pressure with an fsr as weve said, the fsrs resistance changes as more pressure is applied. Force sensitive resistor fsr created by lady ada last updated on 20180822 03. This video describes the operation of force sensing resistors and how to interface them to microcontrollers using an adc channel. Jan 11, 2017 this video describes the operation of force sensing resistors and how to interface them to microcontrollers using an adc channel. These sensors are fairly low cost and easy to use but theyre rarely accurate. This sensor is a interlink model 402 fsr with 12 diameter sensing region. The cad files and renderings posted to this website are created, uploaded and managed by thirdparty community members. Sensor overallsensorseries datasheet search, datasheets, datasheet. This fsr will vary its resistance depending on how much pressure is being applied to the sensing area. The ohmite fsr series exhibits the unique characteristic of dynamic resistance related to the amount of applied force. Fsr is basically a resistor that changes its resistive value in ohms. This forcesensing resistor fsr from interlink electronics is a passive component that exhibits a decrease in resistance.
Force sensitive resistor fsr sensor data sheet fsr 01022018 page 2 of 3 transfer function the sensor requires frequent calibrations to provide reliable measurement, a constant transfer function does therefore not exist. This force sensing resistor fsr from interlink electronics is a passive component that acts as a variable resistor, with resistance decreasing in response to increasing applied force, which makes. Please see the datasheet 1mb pdf for more information, including force vsresistance curves, integration notes, usage tips, and suggested electrical circuits. The fsr sensors are made of conductive polymer which has a property of changing its resistance based on the force. Heres a fritzing diagram combining the interlink fsr, 3. The technology of force sensing resistors was invented and patented in 1977 by franklin eventoff. This force sensing resistor fsr from interlink electronics is a passive component that exhibits a decrease in resistance when there is an increase in the force applied to the 1. Overview force sensitive resistor fsr adafruit learning. Force sensing resistor matrices are commonly referred as pressure mapping technology. Force accuracy ranges from 5% to 25% depending on a number of factors, and the resolution is better than 0. Acknowledging our policy of continual product development, we reserve the right to change, without notice, and detail in this publication. This graph indicates approximately the resistance of the sensor at different force. As an example, well measure the force on the resistor using an arduino uno and a simple voltage divider circuit.
This content and associated text is in no way sponsored by or affiliated with any company, organization, or realworld good that it may purport to portray. As force on the sensor is increased, this resistance is decreased. The resistance is inversely proprotional to the force applied, i. Our sensors are available offtheshelf for prototyping or can be customized to meet the specific needs of your product design and application requirements. It is important to avoid asymmetric capacitive loads. Force sensing resistors fsrs are a type of resistor whose resistance changes when a force or pressure is applied. So you should see a value between 0 and 1023 in the serial monitor, depending on how hard you squeeze the sensor. Sen09376 force sensing resistor 3d cad model library grabcad. This forcesensing resistor fsr from interlink electronics is a passive component that exhibits a decrease in resistance when there is an increase in the force applied to the 1. The 4zone force sensing resistor fsr paired with a suitable actuator can be implemented as a fingeractuated mouse pointing module. Fsr 400 series round force sensing resistor description interlink electronics fsrtm 400 series is part of the single zone force sensing resistortm family. Force sensing resistors, or fsrs, are robust polymer thick film ptf devices that exhibit a decrease in resistance with increase in force applied to the surface of the sensor. In general, the more force applied to the surface of the sensor, the lower the resistance.
Using a force sensing resistor fsr as a toggle switch. Force sensing resistors an overview of the technology. This table indicates the approximate analog voltage based on the sensor forceresistance wa 5v. The grabcad library offers millions of free cad designs, cad files, and 3d models.