The Design And Research On Remote Meter Reading System Based On Single-Chip Microcomputer

With the development of economy and the improvement of living standard, people's living condition changed continuously. Safety, comfort, convenience and healthiness of the living condition come to become the new requirements. To meet these requirements, the buildings of intelligent residential quarters developed vigorously. The security automation, communication automation, and management automation are the three important characteristics of the intelligent residential quarters. The meter automatic reading in water, electricity and gas, which embody the management automation characteristics of the intelligent residential quarters, is one of the necessary guide items, and it occupies the important place in the engineering design. Meter-reading automation changes the past serving manner of manual work, avoids the disadvantages of the manual work, such as the wrong, leaking, and estimating reading, the great time lag, the low efficiency, the existing hidden safety problems. It not only saves the manpower and material resources, but also enhances the security.The meter-reading system in water meter and in gas meter for intelligent residential quarters is designed in this paper. Through analysis and study of the correlative technique and cases, combined with the practical conditions of the residential quarters, the remote meter-reading system based on microcomputer control technique is designed. The design considers sensor technique, microcomputer technique and communication technique as major supports. Based on these techniques, data collecting, data processing, data storage as well as data transmitting are realized. The data of the water meter and the gas meter in every family can be transmitted to the center control room exactly.In order to carry out the remote reading of the water meters and gas meters accurately, this paper designed the hardware and software system, which used AT89C52 as the control core and possessed the remote data collecting and date communication function. The hardware design included the follows: (1) Intelligent meter module, converting the physical signals to the electrical signals by the sensor. (2) Data acquisition module, including the designs of microcomputer and its extended interface; the designs of signal demodulator circuit, signal switchover circuit and A/D converted circuit; the design of communicate interface. In the hardware design, this paper tries to simplify the system structure and peripheral circuit. In the software design, the programs for collecting data and communication are made. Furthermore, the noise questions existing in this system were analyzed and the effective anti-noise methods...