Added Environmental Protection
The Bend Sensor® product consists of a coated substrate, such as plastic, that changes in electrical conductivity as it is bent. Electronic systems connect to the sensor and measure with fine detail the amount of bending or movement that occurs. The single-layer design of the Bend Sensor® eliminates many of the problems associated with conventional sensors, such as dust, dirt, liquids, and heat and pressure effects. Over-laminates or over-molding may also be applied to the sensors for added environmental protection. Flexpoint Sensor Systems offers standard designs and can also custom design and engineer a sensor that meets the dimensions and requirements of your application.
Frequently Asked Questions
The sensor is basically a variable resistor. Typically it only has two leads. In a microprocessor-based circuit, the sensor is set up in a voltage divider, and the change in voltage is read by the processor using an ADC. There are some processors that have an integrated current DAC to bias the sensor with a constant current. The voltage across the sensor is then measured using the microprocessor's ADC.
FSRs are multiple layers that interact with one another. The resting resistance is generally quite high if not open, and when the layers are compressed together, the resistance decreases. The Bend Sensor is a single-layer construction. It starts at a relatively low resistance when flat and increases as it is bent.