A PASSIVE RADIO-FREQUENCY PH-SENSING TAG FOR WIRELESS FOOD-

QUALITY MONITORING

ABSTRACT

• Food freshness is a key factor for public safety. Management and monitoring of food quality are important in food storage and transition.

• awesome concept & technologies is applied .let we see, at present we people not monitor whether the raw food materials decay or not.

• PH-level variations in meats to the three transitions in the spoilage processes. In this work, we demonstrated and compared the pH profiles of fish meats stored at two different temperatures

INTRODUCTION

• Management and monitoring of food quality are important in food storage and transition. Food safety issue is a vital concern as shown in the Hazard and Critical Control Point .

• Conducting organic polymer sensors, on the contrary, require a low operating temperature and usually are very sensitive to moisture which may not be suitable for robust applications. For piezoelectric crystal sensors, a good quality of coating process is required during the fabrication to maintain a consistent sensitivity .

• the enzyme sensors usually require complicated fabrication processes such as the polymer treatment, temperature control, and chemical compound mixing to achieve the required sensing performance

WORK MODEL

• A prototype of a batteryless, wireless pH sensing tag for continuous and real-time fish meat quality monitoring has been demonstrated.We proposed such a method as a cost-effective solution to monitor food quality in large quantity during storage and delivery

•

EXISTING METHOD

• Many aspects of daily life and information used for decision-making are already derived from data collected in various sectors of the digital economy. Everyday considerations like food, health, the physical environment and human interactions are monitored using information collected, stored and analysed through digital communications technologies. This section examines sensing and monitoring developments in use across various industry sectors

Literature Review 1The effect of pH on the initiation of growth of cottage cheese spoilage bacteria

Outline:

The influence of pH on strains of Pseydomonas spp. and Enterobacter agglomerans that cause spoilage of cottage cheese varieties during storage at 7°C has been investigated. In a culture medium adjusted to the required pH with HCl, 57 of 64 strains of Pseudomonas spp. grew at pH 4.8 when incubated at 7°C but a very low proportion of strains grew at pH 4.7 or pH 4.6 and none at pH 4.5. At 20°C some of the pseudomonads grew at pH 4.4. Three out of nine strains of E. agglomerans grew at pH 3.8 when incubated at 7°C and at pH 3.6 when incubated at 20°C. In cultures of E. agglomerans at controlled pH and 20°C, after a lag phase the doubling time at pH 4.1 was 2 h, and at pH 7.0 was 1.4 h.

Literature Review 2

Wireless implantable microsystems: high-density electronic interfaces to the nervous system

Outline:

Describes the development of a high-density electronic interface to the central nervous system. Silicon micromachined electrode arrays now permit the long-term monitoring of neural activity in vivo as well as the insertion of electronic signals into neural networks at the cellular level. Efforts to understand and engineer the biology of the implant/tissue interface are also underway. These electrode arrays are facilitating significant advances in our understanding of the nervous system, and merged with on-chip circuitry, signal processing, microfluidics, and wireless interfaces, they are forming the basis for a family of neural prostheses for the possible treatment of disorders such as blindness, deafness, paralysis, severe epilepsy, and Parkinson's disease.

PROPSED METHOD

• Sensing and monitoring involves the collection of data that ultimately feeds into private and public information systems, which increasingly form the basis of consumer services.

Block diagram TX

PH sensor

ADC

LCD

89c51

Power supply

UART GSM

Block diagram RX

Mobile

WORK TO BE DONE

• POWER SUPPLY CIRCUIT.• MICROCONTROLLER INTERFACE WITH LCD.

MICROCONTROLLER PINS

OVERVIEW OF 8051

8051 Standard• Microcontroller manufacturers have been competing for a long time for

attracting choosy customers and every couple of days a new chip with a higher operating frequency, more memory and upgraded A/D converters appeared on the market

• However, most of them had the same or at least very similar architecture known in the world of microcontrollers as “8051 compatible”. What is all this about?

• The whole story has its beginnings in the far 80s when Intel launched the first series of microcontrollers called the MCS 051. Even though these microcontrollers had quite modest features in comparison to the new ones, they conquered the world very soon and became a standard for what nowadays is called the microcontroller

Liquid Crystal Displays (LCD)

Liquid Crystal Displays (LCD)

An LCD display is specifically manufactured to be used with microcontrollers, which means that it cannot be activated by standard IC circuits. It is used for displaying different messages on a miniature liquid crystal display.

The model described here is for its low price and great capabilities most frequently used in practice. It is based on the HD44780 microcontroller (Hitachi) and can display messages in two lines with 16 characters each. It displays all the letters of alphabet, Greek letters, punctuation marks, mathematical symbols etc. ‘

In addition, it is possible to display symbols made up by the user. Other useful features include automatic message shift (left and right), cursor appearance, LED backlight

Power supply

• circuit

1000m ic roF

1k7805

1 3V IN VO U T

J U MPER 2LED

1N 4007

1 2

1N 4007

1 2 GND

AC I/P230V/50HZ

5V

ADVANTAGE

• Time Duration.• Organ monitoring.• Identifying foreign territories.• Identifying potential hazards and determining

which part of the process they may arise in.