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system structure:
The overall network structure of the community:
The wireless data acquisition and transmission module (SC8836A or SC8836b) that is connected to the three meters for each household and every household. When the acquisition module receives the meter pulse information, it will be sent to the nearest backbone transceiver module. Establish a community zigbee backbone network for the backbone transceiver module (SC8836B), which can be placed on the outer wall of the building opposite to the building that needs to be collected, or installed on the residential lighting pole or on the roof. Each collection point is responsible for collecting data from dozens to hundreds or even thousands of water and electricity meters. The specific number of collections depends on the building environment and specific conditions of the community.
System architecture analysis:
1 In each SC8836B, install a GPRS or CDMA1X terminal module, and use the mobile communication network to transmit it to the management billing center, or other designated locations;
2 Use the wireless data transfer function of the SC8836B module to collect all the data collected by the SC8836B to a certain collection node, and then transmit it to the management billing center through other wired or wireless networks, including the Internet, broadband network or mobile network; Individual data collection points that are inconvenient for networking can be directly transmitted using a GPRS or CDMA1X terminal module alone.
3 Use the 485 bus to connect all the SC8836B collection points in a community together, and then transfer them to the management billing center through other wired or wireless networks, including the Internet, broadband network or mobile network.
4 The central collection module can also set up storage equipment locally, and the meter reading personnel regularly use the handheld terminal to perform one-time meter reading work.
5 All equipment has regular self-checking information transmission to ensure that the equipment is running well. In conjunction with the sending of battery low-voltage alarm signals, when the battery remaining capacity reaches the set range, a low-voltage alarm signal is sent to the management system to prompt the replacement of the battery to ensure the normal operation of the equipment.
System hardware introduction:
1 The system includes three parts: data acquisition and transmission module, central transceiver module and centralized landing module;
2 The data acquisition and transmission module and the central transceiver module are made of highly integrated micro-power single-chip wireless transceiver and single-chip microcomputer, and their volume is very small;
3 The single-chip transceiver can also have a unique manufacturer number in the world (burned in the chip), this single-chip transceiver also has the received signal strength indicator function (RSSI);
4 The smart cards and readers of the new system use the 2.4G ISM free frequency band that does not need to be applied for, and they all meet the relevant national regulations for 2.4G channel wireless products.
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