Electrolytic corrosion resistance method for M-Bus wet-type photoelectric direct-reading water meter

Abstract

The invention discloses an electrolytic corrosion resistance method for an M-Bus wet-type photoelectric direct-reading water meter. The method comprises the following steps that 1, a circuit in a water meter counter is divided into a communication module and a photoelectric coding module, the photoelectric coding module is located on the counter inside the water meter, the communication module ismoved out of the water meter and located outside the water meter with a relatively good environment, the communication module is connected with the M-Bus, and the communication module is connected with the photoelectric coding module through a connecting assembly; 2, the M-Bus is powered on, the communication module is powered on and reset to start working, the photoelectric coding module is not powered on, and all electric connection conductors in the connection assembly are located at a zero level potential; 3, when the M-Bus commands to read the meter, the photoelectric coding module is powered on and carries out reading once, and then the photoelectric coding module is powered off; and 4, the M-Bus is powered off. Compared with a common M-Bus wet-type photoelectric direct-reading watermeter, the M-Bus wet-type photoelectric direct-reading water meter is insensitive to the power supply time of the M-Bus, and the failure rate caused by electrolytic corrosion is low.

Description

technical field [0001] The invention relates to an M-Bus wet-type photoelectric direct-reading water meter, in particular to a method for resisting electrolytic corrosion of an M-Bus wet-type photoelectric direct-reading water meter. Background technique [0002] M-Bus wet-type photoelectric direct-reading water meter is a kind of wired remote water meter with a photoelectric absolute position encoder installed on the mechanical counter of the wet-type water meter and reads the meter through the M-Bus bus. [0003] Usually, the photoelectric absolute position encoding circuit and the M-Bus bus interface circuit of the M-Bus wet photoelectric direct reading water meter are installed in the mechanical counter of the wet water meter, which is continuously affected by the change of water pressure. Under the influence of various factors (pressure change, temperature change, sealing material aging, continuous charging), electrolytic corrosion will occur between conductors (solder ...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the resistance between conductors on the circuit board in the M-Bus wet-type photoelectric direct reading water meter is greatly affected by water pressure and sealing conditions, and the resistance will gradually decrease with the normal operation time; When the bus is connected, the voltage between the conductors can be up to 36 volts; the power-on time varies due to the number of meters on the bus and the number of communications per day. Generally, it is 10-20 minutes per day (as long as the bus is powered on, the meters in the meter The circuit will be charged), in extreme cases it may be continuous power

[0006] In this case, the degree of electrolytic corrosion of the M-Bus wet-type photoelectric direct-reading water meter will continue to deepen, and some meters will fail before reaching the designed service life

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