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A passive radio frequency p h-sensing tag for wireless food-quality monitoring
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A passive radio frequency p h-sensing tag for wireless food-quality monitoring

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  • 1. A Passive Radio-Frequency pH-Sensing Tag for Wireless Food-Quality Monitoring Abstract: Here we are presenting a new method, suitable for food quality management by wirelessly monitoring pH level changes in food with a flexible pH sensor which is embedded in a battery less radio-frequency (RF) transponder. Conventional radar systems comprise a collocated transmitter and receiver, which usually share a common antenna to transmit and receive. A pulsed signal is transmitted and the time taken for the pulse to travel to the object and back allows the range of the object to be determined. The wireless sensor tag includes a flexible pH sensor based on miniature iridium oxide and silver chloride (AgCl) sensing electrodes integrated on a deformable substrate, and battery less wireless communication circuitry. The sensor tag and reader system is designed to achieve convenient, long-term, and on-demand wireless in situ monitoring of food quality, especially for large-quantity applications and continuous monitoring from place of production to retail stores. Existing System: In this existing system, there is device to monitor or to check the Ph rate of a food material that can be used only in research labs. The existing method which not having the wireless communication to transfer the data. So we go to our proposed system. Proposed System: In this project, we are going to pH sensor system that provides a direct and convenient means to monitor produce/food quality to address food safety and waste issues. Here we connect the pH sensor with microcontroller, which would receive the data signals from sensor for that we have to place the sensor in the surface of the food material to sense the pH level. The status will be sent through zigbee transceiver to the PC section which connected with the zigbee. The status also been shown in LCD.
  • 2. Block diagram: Transmit Section: Power supply PH sensor 8051 MICRO CONTROLLER LCD Monitoring Section: Power supply Max232 PC
  • 3. Hardware Requirements:      8051 Microcontroller and power supply pH Sensor LCD Zigbee Transceiver Max232 Software Requirements:  Embedded C  Keil compiler Application:   The system can be used in food processing unit The system can be used in homes and hotels Advantages:   Low cost and Reliable Easy to use

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