Shimmer Bridge Amplifier+
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shimmer DISCOVERY IN MOTION Shimmer Bridge Amplifier+ (INTRODUCTION The Shimmer Bridge Amplifier+ module allows for strain and load cell data acquisition for force and resistance measurements free from wired constraints, allowing for natural range of motion, and measurement outside of a dedicated lab setting. Compatible with the Shimmer3 Platform, the Bridge Amplifier module also boasts best data quality with integrated lODoF inertial sensing via accelerometer, gyroscope, magnetometer and alitmeter, each with selectable range. -(key features o Interface strain gauge or load cell sensors with Shimmer3 to measure load, weight, force, torque or pressure, o Interface variable resistance sensor with Shimmer, for example, temperature sensitive resistor, to measure ambient, skin-surface or other temperatures, o Provides excitation source for strain gauge or load cell, meaning no external voltage source is required, o Excitation source and amplifier enable are software controlled, allowing optimisation of power consumption, o Two channels of output from bridge amplifier, providing both low and high gain; low gain is ideal for bipolar inputs, whilst high gain provides additional 3x gain for unipolar load cells, o EEPROM storage device enables expansion board detection and identification, as well as 2032 bytes of data storage. -(applications o Strength Capacity and Force Measurement o Resistance Measuement ° Rehabilitation ° Sports Training o Muscular-skeletal Clinical Research o Environmental Monitoring ° Fall Risk Assessment (Grip Strength) (PRODUCT OVERVIEW () The Bridge Amplifier Module contains a bridge amplifier, excitation source, and connector enabling force measurement with Shimmer, as well as a buffered resistance divider amplifier to enable resistance measurements. The bridge amplifier is ideal for all load, weight, force, torque, and pressure measurements through the connection of a user-supplied strain gauge based bridge sensor or load cell. The resistance divider input is suitable for variable resistance sensors, such as a temperature probe.

Shimmer m TECHNICAL SPECIFICATIONS - BRIDGE AMPLIFIER Normal Channel 183.7 ± 1%, 551 (3x Normal), ± 1% High Gain Channel DC.. 1 kHz, High Gain Channel DC.. 100Hz Common Mode Rejection1 >110dB Normal Channel ± 7mV, ± 2.5mV/V; Hi-gain Channel 0-4mV, ±1.43mV/V ILow Noise - Normal Channel <1% Full-scale; High Gain Channel <0.5% Full-scale Excitation Voltage 2.8V ± 5%2 Input Protection Current limiting, EMI/RF suppression 1 Calculated specification, exact value subject to environmental and component variation. ^ The excitation source is software controlled. 3 This value is load-cell...