Design and Implementation of an RF-Based Wireless Displacement Transmitter

The main objective of this article is to design and implement a wireless inductive type displacementtransmitter. Wireless networks are playing a vital role in the modern process industrial environment due to their robustness, lower installation cost, low maintenance cost and low energy consumption in public frequency band domain. A simple, costeffective general-purpose multi-channel hardware module has been designed using Radio Frequency (RF) transceiver in the field of wireless sensor network applications. The electric signal from the modified differential inductance bridge circuit is fed to the RF based wireless module for transmitting the sensor's data to the control room of the process industry. The output of the sensor is conditioned in the range of 0-5 volt for the proposed system. This time varying analog data is converted into 8-bit parallel data. This 8-bit parallel data is transmitted through the transmitter module and then received by the receiver in the form of power. The output is decoded with the decoder of the receiver side. The decoded voltage signal is almost same as the output voltage signal of the sensor. From the experimental datasheet, it is reflected that this modified wireless RF based transmitter has good linearity and repeatability for short distance transmission.