MULTI-CHANNEL WIRELESS MEASURING SYSTEM WITH SEPARATED SENSOR INTERFACE MODULE

摘要

A multi-channel wireless measuring system with separated sensor interface modules is provided to form a multi-channel by additionally combining the sensor interface modules corresponding to each sensor, to a wireless data logger in measuring the structure with plural sensors. In a multi-channel wireless measuring system, at least one sensor(100) diagnoses and measures the state of a structure. A sensor interface module(200) designs circuits for driving the sensors, respectively and converts physical quantities such as voltage, current, resistance of the sensor into an electrical signal corresponding to a wireless data logger(300). The wireless data logger is composed of a signal conditioner unit(310) setting a frequency band of received data and increasing data classification power by filtering the data out of the set frequency band; a multiplexer unit(320) selecting one input data from plural data by a logic circuit; an analog/digital conversion unit(330) converting an analog signal outputted from the multiplexer unit into a digital signal; a wireless communication unit(340) transmitting data converted into the digital signal, by wireless; a controller unit(350) controlling data transmission of the wireless communication unit controlling each sensor through the sensor interface module; and a GPS(Global Positioning System) time synchronization unit(360) preventing a measurement error due to time by time-synchronizing the detection signal of the sensor through a GPS. A wireless receiver(400) receives data from the wireless data logger through wireless communication, analyzes the received data, and stores and manages each sensor information.