The Scientific Research In Wireless Transcription Terminai For Meter System

The nRF24E1 is a lower cost 2. 4GHz radio transceiver with an embedded 8051 compatible microcontroller and a 10-bit 9 input 100 kSPS AD converter. This paper introduced wireless transcription for meter system which is maded from nRF24E1 internal structure, Pin, AD converter, Radio transceiver, Radio port of nRF24El. and stress introduced its Communication protocol, Modes of operation, Configuration, ShockBurst^TM, etc. and also discussed that application in a wireless transcription for meter system in hardware circuit and software.This equip based on the research of the special ShockBurst^TM technique of the SoC chip nRF 24 E1, radio frequency technique, procedure leading technique, allocation way etc on a wireless transcription for meter system for purpose. This equip researched the influence of group amount, correspondence distance to the reliability of data transport ion in the progress. Make the software and get the code with Keil C51, write the program in memory out of the chip. After laboratory simulation test, verified by groups and the scene distance simulation test, through the experiment of building a data base by communicating with super ordination machine, has realized the function that group wireless monitor, check and wireless transcription in 50 meters or so, 20 forms as a group.The address of the table is written in at the beginning of programming and it is not good at mass production. Because of it, we specifically developed a simple write-code implement, through a sophisticated 100 micro amps current source in a resistance network to produce a result of voltage, using nRF24E1 ADC to change the representatives of the input figures 0-9 voltage values into the target table with a table address code as the identity.The experiments based on the amount less or than 20 in one group are accomplished during the research. There are no data transmission mistakes and no obviously deferring time under the condition of 25 meters in one group and 70 meters, and data transmission is mistake once in a while in 120 meters.It hasn' t been accomplished under the condition of more than 30 meters. When being less than 20(10 in one group) and 70 meters in distance, data transmission has no mistake and on tome, with on obviously shift earlier, the same as the condition of 120 meters. The experiments at widening space show that 150 meters of distance is ok. Thinking of scene reality and the EMC in distance, make sure that communication is reliable under 50 meters.An example certified that it is feasible that grouping wireless transcription for meter. Based on the limited memory, the space being able to store data is small, set 100 as the initial transcription times, which is the disadvantage of this equip. for this, the next step is to choose one chip with larger memory space, or develop a data storage implement to solve this problem.Thinking by studying and putting into practice: Fully utilizing new technique of proper SoC chip nRF24E1, can come true grouping together wireless checking, and middle short range wireless monitor , detecting.This research and practice reveal that the wireless grouping above copying a form being able to carry out a group of 20 all together wireless to copy a form. It will make wireless checking field available and improvable.