Measuring Speaker Cone Deflection Using Triangulation Sensors Posted in: Displacement Measurement – Tags: , ,

A major car audio speaker manufacturer contacted Acuity to help solve a challenging applied measurement problem. After consulting with our team and learning about potential measurement sensor options, the company’s research and development department chose the AR200 to measure the positional changes of a subwoofer cone.


Fast-moving targets demand a laser sensor with incredibly fast sampling speeds. As the sales engineer on our team explained, in this type of scenario involving measuring sound vibrations, the sensor must have fast frequency responses to profile the entire amplitude of cone movement.

In this case the cone was moving at 60 Hz. The engineer required an analog output whose resolution was as good as that of the measurement resolution. In working with the speaker manufacturer, our engineer also learned they needed laser sensors that wouldn’t suffer performance problems while measuring a black target. The AR200 with its CMOS detector array performs well on light and dark targets alike.

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AR200 Laser Measurement Sensor

The AR200 laser measurement sensor is a compact, durable, and reliable sensor built for many industries including the lumber, medical and high-tech industries. The AR200 sensor consists of five different models with ranges up to 100 mm (4 in) and accuracies down to 12-microns to satisfy precise measuring requirements.