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With the development of microelectronic technology, sensor technology, computer technology and modern communication technology, photoelectric sensors can now be used to develop automatic meter reading systems.
In order to settle the electricity bills of users in time, the electric power department usually sends special meter readers to the relevant users to regularly check and copy the electric energy meters installed on the spot, through manual reading, recording, calculation and charging. . This not only wastes a lot of manpower, but also causes unnecessary errors due to manual reading, and sometimes brings unnecessary trouble and loss to users. Some criminal suspects even enter the room as a meter reader to commit crimes and affect the society. Law and order. In addition, it is not convenient for the power sector to carry out modern management. Therefore, both the electric power sector and the users are eager to change the current backward state. The development of automatic meter reading systems by photoelectric sensors has solved people's problems in this regard.
The aluminum plate of the electric energy meter is driven to rotate by the torque generated by the action of the electric eddy current and the magnetic field. The photoelectric sensor can convert the number of revolutions of the aluminum plate into the number of pulses. For example, if the rotating bright aluminum plate is partially blacked, and equipped with a reflective photoelectric transmitting and receiving pair tube, when the aluminum plate rotates, pulses are generated in the partially blacked area, and the number of revolutions of the aluminum plate can be sampled It is converted into the corresponding pulse number, and sent to the T0 port of the CPU for counting processing through the photoelectric coupling isolation circuit. The use of photoelectric coupling isolator can effectively prevent interference signals from entering the microcomputer. Combined with other transmission methods, an automatic meter reading system can be formed.
At present, the automatic meter reading system has not been used on a large scale. This current technology has a lot to Realize automatic meter reading.
