Meter-bus data collector with ultra-low power loss

Abstract

The invention relates to a meter-bus data collector with ultra-low power loss. The meter-bus data collector comprises a main CPU module integrated with a universal asynchronous receiver / transmitter (UART) chip, a clock module, a memorizer and an RS-485 communication module. The meter-bus data collector is characterized in that the main CPU module employs a 16-bit Flash type MSP 430 series ultra-low power loss singlechip computer waken up by the clock module; and the RS-485 communication module is isolated by a high-speed isolation chip, is waken up by the clock module and is provided with an M-bus communication collection module for collecting the data. The power loss of the meter-bus data collector is 1 / 20 that of a conventional data collector. The meter-bus data collector can save a lot of energy for long-term running, can collect the data according to collection solutions during running process, has relatively high collection reliability, and can mark metering devices having faults, so that the faults can be found and dealt with as early as possible, thereby facilitating reducing metering loss. The meter-bus data collector has relatively high communication speed with no need of frequently reading meter, so that the power consumption of the system can be further reduced.

Description

technical field [0001] The invention relates to data collection, in particular to a counter bus data collector with ultra-low power loss. Background technique [0002] The automatic cluster meter reading in the energy management system widely uses the meter bus (Meter-Bus, abbreviated as M-Bus) for remote data transmission, which is connected by ordinary two-core cables, and simultaneously completes the functions of providing meter power and data communication. Function, transmission data capacity, speed and quantity can fully meet the requirements. The existing M-Bus data collector with on-site real-time data acquisition and communication conversion functions converts the M-Bus interface into an RS-232 bus or RS-485 bus, and the upper computer passes through the RS-232 bus or RS-485 The bus accesses the collector to collect the data of intelligent water meters or intelligent gas meters (hereinafter collectively referred to as metering instruments) in real time. The M-Bus d...

AI Technical Summary

Problems solved by technology

The existing M-Bus data collector with on-site real-time data acquisition and communication conversion functions converts the M-Bus interface into an RS-232 bus or RS-485 bus, and the upper computer passes through the RS-232 bus or RS-485 The bus accesses the collector to collect the data of intelligent water meters or intelligent gas meters (hereinafter collectively referred to as metering instruments) in real time. The M-Bus data collector needs to be kept in the running state for collection. The power loss of one meter reading terminal is calculated at 2W, and the total power loss of 6,000 cluster meter reading terminals is 12KW. The annual power consumption costs tens of thousands of yuan, wasting a lot of resources

Moreover, each communication must pass through the RS-485 bus and the M-Bus data bus, which not only reduces the reliability of the system, but also directly affects the success rate of meter reading. Up to 38400bps, while the relative speed of the M-Bus data bus is relatively low, the practical maximum rate is only 9600bps, the M-Bus data collector spends a lot of time waiting for the reply of the M-Bus network, which increases the power loss accordingly

In particular, the existing M-Bus data collectors have no data storage function and automatic diagnosis function, and cannot trace the corresponding energy consumption, nor can they diagnose the failure of the meter

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