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The following document describes the process of developing a Custom CompactRIO Module to condition the non-TTL output of a Variable Reluctance Sensor so that it can interface with the FPGA in the CompactRIO Embedded Chassis or the R-Series Device. The document will demonstrate the hardware and software development necessary to create a working module.
Variable Reluctance speed sensors are widely used in automotive, aerospace, and machine condition-monitoring applications to acquire positional and frequency information with respect to rotating machinery. The devices that typically deliver this information in the form of a time-varying voltage are speed sensors such as encoders and tachometers. People often use counters to acquire these types of signals because of their high accuracy.
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