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Strain loggers or bridge strain loggers autonomously monitor the strain on different types of architecture such as buildings and bridges. Generally, strain loggers wirelessly send out periodic strain measurements for safety monitoring purposes.
For bridges, the challenge is to create a circuit that connects multiple strain sensors or gauges to strain loggers to cover identified pressure points on the bridge. There are cases where multiple strain loggers are required, requiring a separate circuit to be made for each strain logger. As an example, for one-fourth bridges, a strain logger can be connected to a strain gauge and either a precision bridge completion resistor or a temperature gauge to complete the circuit. The additional components are required to facilitate the conversion of voltage to the desired measurement unit for more accurate measurements. For buildings, the same approach is also used but is applied on a vertical scale.