Wireless communication method for volume correction instrument

Abstract

The invention discloses a wireless communication method for a volume correction instrument. A wireless data transmission chip CC1100 produced by a ChipCon company is selected, and in a main body, matched capacitors are added to ports, such as DDVD, AVDD, DGUARD and the like, the piece distribution forms of elements, such as C30, C31, C32, C33, C34, LI, L2, L3, and L4 of Internet at the front end of CC1100 are changed, and an independent floor area is avoided in layout of a printed circuit board (PCB). The earth wire equalization form is changed, a lead foot SCLK is digital input, and SO(GDO1) and GDO2 are digital output, and are connected with TA2, TA1, and TA0 of MSP430; GDO0(ATEST) is digital input/output (I/O) and is connected with TA2, TA1, and TA0 of MSP430; CSn is digital input and is connected with SMCLK of MSP430; and SI is digital input and is connected with TAINCLK of MSP430. The chip works in a frequency range of 433MHz, and a narrow-band working mode is set. The method solves the problem of unsafety of the conventional RS485/232 interface and an infrared manual meter reading mode, improves convenience and safety of operating data reading of a site instrument in the process of natural gas metering, and has the advantages that system cost is saved, power consumption is reduced and the like.

Description

technical field [0001] The invention belongs to the field of gas flow measurement, and relates to a wireless communication method for reading process data of natural gas measurement recorded by a volume corrector to a host computer. Background technique [0002] The volume corrector and the flowmeter are generally installed in the closed natural gas pressure regulating and measuring box on site, and most of the sites do not have power supply conditions. The daily operation of the volume corrector is all powered by the internal lithium battery. The general requirements In the case of no external power supply, it can work stably for more than 5 years. [0003] The volume corrector cooperates with the gas turbine flowmeter (or waist wheel flowmeter) to measure the volume flow of natural gas. The gas turbine flowmeter (or waist wheel flowmeter) is used to detect the volume flow of natural gas under working conditions. By collecting the working condition flow signal output by th...

AI Technical Summary

Problems solved by technology

[0011] The problem to be solved by the present invention is to realize wireless data transmission for on-site management of natural gas metering instruments. Appropriate, reliable, convenient and accurate reading of the operating data of the instrument

The chip works in the 433MHz frequency band and is set to a narrow-band working mode, which solves the problem of data transmission distance in a complex transmission environment. At the same time, data error correction codes are added to the software design to make data transmission accurate and reliable. The timing of the bits is coordinated to ensure fast and accurate data transmission. At present, it is the first time for similar products in the world to adopt it, which makes this product have a certain forward-looking

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