Design scheme of wireless remote water meter based on PICl6F628A chip

Abstract: The design information of wireless remote water meter based on PICl6F628A chip is provided by excellent flowmeter and flowmeter manufacturers. Abstract: With the progress of society and economy, residential commercialization has developed rapidly, and the problem of meter reading and charging of residential water, electricity, gas and heat meters has become increasingly prominent. How to effectively solve the technical problems of household meter reading charges and provide a reasonable, complete and systematic implementation. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the article details of the wireless remote water meter design scheme based on the PICl6F628A chip. With the progress of society and economy, the commercialization of housing has developed rapidly, and the problem of meter reading and charging of residential water, electricity, gas and heat meters has become increasingly prominent. How to effectively solve the technical problems of household meter reading charges and provide a reasonable, complete and systematic implementation management plan requires the joint efforts of enterprises, scientific research and public utilities management departments. This paper proposes a wireless intelligent remote water meter system to solve this problem. With the progress of society and economy, the commercialization of housing has developed rapidly, and the problem of meter reading and charging of residential water, electricity, gas and heat meters has become increasingly prominent. How to effectively solve the technical problems of household meter reading charges and provide a reasonable, complete and systematic implementation management plan requires the joint efforts of enterprises, scientific research and public utilities management departments. At present, there are various forms of remote meter reading systems for residential water, electricity, gas and heat meters, but the market is relatively chaotic and the technology is not yet mature. The traditional wired meter reading system has complex wiring, poor reliability, and difficult maintenance. It is difficult to achieve management upgrades and cannot meet the market requirements for system transformation of old buildings. The emerging GPRS and SMS GSM network meter reading methods are expensive to use and are not suitable for large-scale promotion. The wireless intelligent remote water meter system has become the leading system of intelligent management in the water meter industry due to its advantages of convenient installation, fast maintenance, and freedom from installation environment and wiring restrictions. The system is generally composed of four parts, namely the water company's computer data management system, on-site data downloader (hand copy machine), data concentrator, and wireless remote intelligent water meter. Among them, the wireless intelligent remote water meter is the basic part of the whole system and the information generation unit. It is generally composed of a new type of sensor and control circuit board on the basis of the original base table. 1. Functions realized by wireless intelligent remote water meters Wireless communication is easily affected by the external environment in the user's use environment, such as the environment between residential buildings, the height of residential floors, the distance between buildings, and urban wireless communication. Environmental interference sources, residential housing structure, etc. have a great impact. Therefore, the installation of the meter, the installation of the building concentrator, the installation of the cell concentrator, especially the wireless communication antenna of the building concentrator, the wireless communication antenna of the cell concentrator. If a hand copying device is used to copy the building concentrator, the building concentrator can be installed in the corridor, and the antenna can be led outdoors. If the residential concentrator is adopted to adopt the building concentrator, the building concentrator is recommended to be installed on the roof. The concentrator installed on the roof can be powered by solar energy or 220V mains. Through analysis, it is determined that the wireless intelligent remote water meter should realize the following functions: automatic timing or quantitative reporting of water volume; control the valve switch function of the water meter according to the concentrator command; Small), the function of insufficient battery power; parameter setting function according to the needs of the management department. 2. The design of the hardware circuit Select the public frequency band (ISM frequency band) for the wireless communication frequency of the wireless intelligent remote water meter. The watch is powered by batteries, which ensures that the collection and storage of information by the watch will not be affected when the mains power is cut off. According to the requirements of industry standards, the service life of the battery is more than 6 years, so the design of the whole product should fully consider the power consumption problem. The battery selects high-energy lithium batteries, and ensures the service life of the battery by selecting low-power devices and setting precise micro-power work methods. By adopting dual sensors, software error correction, anti-jamming technology and encryption technology to ensure the accuracy of data collection, storage and transmission. 2.1 Components and functions of the wireless intelligent remote water meter The wireless intelligent remote water meter mainly includes the following units: single-chip microcomputer, input acquisition, wireless data transmission, power supply, valve control, and voltage detection unit. Its block diagram is shown in Figure 1. 2.2 Hardware design of each unit circuit 2.2.1 Input signal acquisition unit Sensor selection Small reed switch with low contact impedance, no standby power consumption and good reliability. As a magnetic sensor, when the magnet enters the critical area of ​​the reed switch, the reed switch will pull in multiple times, resulting in repeated metering. In order to improve the measurement accuracy and anti-interference, a dual-sensor design is used in the product. No matter how many times a single sensor is pulled in, it is counted as one pull-in, and only one pull-in of each of the two sensors is considered an effective measurement.

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