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Coal gas remote meter reading system

A remote meter reading system and gas technology, applied in the transmission system, digital transmission system, electrical components, etc., can solve the problems of low meter reading efficiency, low accuracy, and difficulty in meter reading in companies

Inactive Publication Date: 2009-11-18
无锡虹叶腾文电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of this invention is to provide a remote meter reading system for gas, which solves the problem of data packet transmission errors in commonly used meter reading systems, which makes it difficult for companies to read meters at home, and the meter reading efficiency is low and the accuracy is not high

Method used

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  • Coal gas remote meter reading system

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Embodiment Construction

[0021] Such as figure 1 As shown, the gas remote meter reading system disclosed by the present invention includes a GSM main module and an acquisition flowmeter instrument module EK connected with the GSM main module, an acquisition flowmeter instrument module CORUS, a PLC module, and an isolated power supply module. The GSM main module passes through the MODBUS The bus is connected with the collection flow meter instrument module EK, the collection flow meter instrument module CORUS, and the PLC module. The intrinsically safe power supply of the isolated power supply module is placed inside the explosion-proof box, and the GSM main module is connected with the SCADA computer system in the form of OPC-SERVER. When the GSM main module performs GPRS / CDMA transmission, the encryption is based on the KEELOQ algorithm, and the instrument terminal needs After learning with the host, the host can communicate with the host. During the learning process, the instrument sends the serial ...

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Abstract

The invention discloses a coal gas remote meter reading system, which comprises a GSM main module and a collection flow meter instrument module EK, a collection flow meter instrument module CORUS, a PLC module and an isolated power supply module which are connected with the GSM main module, wherein the GSM main module encrypts based on a KEELOQ algorithm while performing GPRS / CDMA transmission, an instrument terminal needs to study with a host so as to communicate with the host, and in the studying process, the instrument terminal sends a serial number and an encryption key EN_KEY to the host, and the host generates a random number. The coal gas remote meter reading system has the advantages of adopting GPRS / CDMA to effectively perform remote transmission and using an encryption technique to successfully solve the problem of incomplete data packets in the process of the GPRS / CDMA transmission. Besides, the mode of power supply adopts power supply modules of an explosion-proof power supply and an intrinsically safe power supply module to flexibly satisfy on-site actual needs.

Description

technical field [0001] The invention relates to a gas remote meter reading system, in particular to a device connecting a safe area and a dangerous area. Background technique [0002] The current wireless automatic meter reading system generally adopts the wireless working frequency of 433.92MHz. The receiving range of this frequency is small, generally between 100-300m. teleportation. Some systems also use GPRS / CDMA for remote transmission, but due to discontinuity in wireless transmission, the server cannot resolve incomplete data transmission packets. In addition, other systems cannot solve the free expansion of data and control input and output (DI, DO, AI, AO) of on-site flow rate correction instruments, so they are far from meeting the requirements of on-site gas control, and have not realized monitoring in the true sense. [0003] Most of the commonly used remote meter reading systems are designed for SCADA systems, and their workflow and principles are as follows: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F15/06H04L1/00H04L29/06
Inventor 吴庆彬徐晓明
Owner 无锡虹叶腾文电子科技有限公司
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