Parameters for SMC-R134 Reader ( Ni, 2009 )
In this chapter, you’ll be able to do the following:
You’ll know why the identification of single daily cow is needed
The RFID device used in this research
The communication between RFID and PC, between RFID and MCU
The good effect due to the technology (experiment)
2. Why the identification of single daily cow is needed
Daily cow is one kind of ruminant animal, whose rumen plays an important role in the digestive process. There are many kinds of microbes in the lumen. Actually it is these microbes that play a crucial part for the digestion. These microbes are sensitive to the pH value in the rumen environment. To keep these microbes be in active status, the pH value should be kept at stable (the pH range should be 6.4~6.8). The studies show that the pH value in the rumen is relative with the amount of the concentrated feed. So we need control the amount of the concentrated feed that each daily cow got. This process involves the feeding based on a single daily cow. To realize this process, we need to identify the daily cow, and then give it the amount of concentrated feed that it needs. This process could be realized by the application of RFID system.
Ni (2009 ) designed an intelligent moving precise feeding machine for single dairy cow. An RFID system was equipped on this machine, which can move and identify the single dairy cow, and then give it the amount of the concentrated feed needed. The schematic figure is showed in Fig.1.
Voulodimos (2010) established a complete farm management system based on animal identification using RFID. This system contains various kinds of workstations, such as desktop computers (servers, database), laptops, handheld mobile devices, and a number of different subsystems. Fig. 2 shows the main subsystems: the central database, the local database and the mobile—RFID subsystem.
The central database system (left down in Fig.2) is used to store all information related to the management of animal tracking and monitoring at central level.
The local database system (right-down in Fig.2) is based on an animal data management application, such as tracking of animal vaccination, tracking of animals’ diet.
3. The RFID device used in this research
RFID is the abbreviation for Radio Frequency Identification, which is a technology that utilizes communication through electromagnetic waves to exchange data between an object and a terminal to realize the purpose of identification.
An RFID device (tag);
A tag reader with an antenna and transceiver;
A host system or connection to an enterprise system.
In the research of Ni (2009 ) and Li (2010), the reader used is SMC-R134 (Fig. 4), and the tag is SMC-E1334 (Fig. 5). Both the reader and the tag are the product of SMARTCHIP MOCROELECTRONIC CORP (SMC) in Taiwan.
The maximum identify distance for this RFID system is 50cm10%. The frequency is 134.2 kHz. The working voltage is DC 9V. The parameters are shown in table 1.
|Frequency||AM 134.2 kHz|
|Voltage||Vcc = 9V|
|Current dissipation||Max: 200 mA (9V)|
|Induction distance||50cm10%, working with SMC-E1334 tag|
There are ten pins for the reading head of SMC-R134 reader. The colors for each pin (from left to right) are: red, black, yellow, purple, gray, green, brown, white, blue and orange, which is shown in fig. 6. The function for each pin is shown is table 2.
|Pins||Pin Color||Name||I/O||Sign||Min Value||Typical|
|PIN5||gray||O||±5V||±8V||Used to select|
|Connected GND to|
Light orange LED
There are two types of output format: RS232 and Wiegand. Ni (2009 ) used RS232 format to establish the communication between RFID and PC. Li (2010) used Wiegand format to establish the communication between RFID and MCU.
4. The communication between RFID and PC, between RFID and MCU
4.1. The communication between RFID and PC
Ni (2009 ) used visual basic 2005 (VB 2005) as the software to communicate RFID with PC. To realize this objective, RS232 output format was used. The function of ReadExisting() was used to read the data sent by RFID reader. Before doing this, we need to establish the serial port object in VB 2005. The block diagram of establishing serial port object is shown in Fig 7.
4.2. The communication between RFID and MCU
Li (2010) used Wiegand output format to establish the communication between RFID and MCU. This can realize the automatic control through only RFID and MCU without the help of computer. So the cost was minimized.
The software developed by Ni (2009 ) can be used as post processing tool to establish the dairy cow information system. The cow information, such as, ID number, weight, age, milk production, were recorded into the database. The ID number was gotten through the communication of RFID and PC. Then these ID numbers can be exported to the MCU to establish the communication between RFID and MCU.
Li (2010) imported two external interrupts to read the tag number. Once the tag number is matched with one of the ID stored in MCU, the single cow will be identified, and the cow’s information will show in the LCD screen. The block diagram of communication between RFID and MCU is shown in Fig 8.
5. The good effect due to the technology (experiment)
Gao (2008) invented one kind of intelligent precise feeding machine. This machine was used in the research of Ni (2009 ) and Li (2010). This machine was equipped with the SMC-R134 reader. And the experimental cow was worn an ear tag (SMC-E1334). The feeding machine is shown in Fig 9.
Ni (2009 ) did a basic experiment using this machine. Ten dairy cows were fed for one month. The concentrated feed was given by this machine based on the cow information (ID number, weight, age, milk production, etc). The result showed that the milk production can be added 4kg per day per cow.
Li (2010) did a deep experiment using this machine. 70 dairy cows were used. Besides the milk production, milk fat content and protein content were also be evaluated. The improved milk production is 3.9 kg, the average milk fat content is 3.74%, and the average protein content is 2.98%.
In this chapter, we introduced the application of RFID in daily cow industry. Firstly, we gave a brief introduction of why the identification of single daily cow is needed. By using RFID technology, the single daily cow information can be stored in database system. Through the tag ID, we can know the information about the cow. Later, we introduced one kind of RFID device used in the research. The communications between RFID and PC, RFID and MCU were established. Finally, two experiments based on the machine invented by Gao (2008) were introduced. The experimental results was good. The milk production were improved about 4kg per day for per cow.
7. Abbreviations and symbols
RFID: Radio Frequency Identification
PC: Personal Computer
MCU: Micro Controller Unit