阅读说明：本技术 一种M-Bus湿式光电直读水表抗电解腐蚀方法 (anti-electrolytic corrosion method for M-Bus wet-type photoelectric direct-reading water meter ) 是由 罗军 于 2019-10-12 设计创作，主要内容包括：本发明公开了一种M-Bus湿式光电直读水表抗电解腐蚀方法,包括以下步骤：1、将水表计数器内部的电路分为通讯模块和光电编码两部分,其中光电编码模块位于水表内部的计数器上,通讯模块移出水表,位于相对环境较好的水表外部,所述通讯模块与M-Bus总线连接,且通讯模块与光电编码模块之间通过连接组件连接；2、将M-Bus总线通电,通讯模块上电复位开始工作,且不给光电编码模块上电,连接组件中的所有电连接导体处于零电平电位；3、当M-Bus总线命令读表时,光电编码模块上电读数一次,之后光电编码模块下电；4、M-Bus总线断电。本发明实施例相对于普通的M-Bus湿式光电直读水表对M-Bus总线供电时间不敏感,因电解腐蚀造成的故障率低。(The invention discloses an electrolytic corrosion resisting method for an M-Bus wet-type photoelectric direct-reading water meter, which comprises the following steps of: 1. dividing a circuit in a water meter counter into a communication module and a photoelectric coding module, wherein the photoelectric coding module is positioned on the counter in the water meter, the communication module is moved out of the water meter and positioned outside the water meter with better relative environment, the communication module is connected with an M-Bus, and the communication module is connected with the photoelectric coding module through a connecting component; 2. electrifying the M-Bus, starting the electrifying reset of the communication module, not electrifying the photoelectric coding module, and keeping all electric connection conductors in the connecting component at a zero level potential; 3. when the M-Bus commands to read the meter, the photoelectric coding module is electrified for reading once, and then the photoelectric coding module is electrified; 4. the M-Bus is powered off. Compared with the common M-Bus wet-type photoelectric direct-reading water meter, the water meter provided by the embodiment of the invention is insensitive to the power supply time of the M-Bus, and has low failure rate caused by electrolytic corrosion.)

1. An anti-electrolytic corrosion method for an M-Bus wet-type photoelectric direct-reading water meter is characterized by comprising the following steps:

Step 1, dividing a circuit in a water meter counter into a communication module and a photoelectric coding module, wherein the photoelectric coding module is arranged on the counter in the water meter, the communication module is arranged outside the water meter with a relatively good environment, the communication module is connected with an M-Bus, and the communication module is connected with the photoelectric coding module through a connecting component;

Step 2, electrifying the M-Bus, starting the work of electrifying and resetting the communication module, not electrifying the photoelectric coding module, and keeping all electric connection conductors in the connecting component at a zero level potential;

Step 3, when the M-Bus commands to read the meter, the photoelectric coding module is electrified for reading once, and then the photoelectric coding module is electrified;

and 4, powering off the M-Bus.

2. The method for resisting electrolytic corrosion of an M-Bus wet-type photoelectric direct-reading water meter according to claim 1, wherein in step 1, the photoelectric encoding module comprises a photoelectric encoding circuit board; the communication module comprises an M-Bus interface circuit board.

3. The method for resisting electrolytic corrosion of an M-Bus wet-type photoelectric direct-reading water meter according to claim 1, wherein in step 1, the communication module and the photoelectric coding module are both provided with independent singlechips.

4. The method as claimed in claim 1, wherein in step 2, after the M-Bus is powered on, the communication module is always in a power-on working state until the M-Bus is powered off.

5. The method of claim 1, wherein in step 2, the electrical connection conductors in the connection assembly are at the same potential only in the case of a non-local meter reading command.

6. The method for resisting electrolytic corrosion of an M-Bus wet-type photoelectric direct-reading water meter according to claim 1, wherein in the step 2, when the M-Bus is powered, the photoelectric coding module is electrified only under the condition of a local meter reading command, and is not electrified under other conditions.

7. The method as claimed in claim 1, wherein in step 3, the time for the photoelectric coding module to perform power-on reading once is 0.1S to 1S, and the power-on voltage is 2.2V to 5V each time.

8. The method as claimed in claim 1, wherein after the M-Bus is powered on, the steps 3 and 4 are repeated until the M-Bus is powered off.

Technical Field

The invention relates to an M-Bus wet-type photoelectric direct-reading water meter, in particular to an anti-electrolytic corrosion method of the M-Bus wet-type photoelectric direct-reading water meter.

Background

The M-Bus wet type photoelectric direct reading water meter is a wired remote transmission water meter which is provided with a photoelectric absolute position encoder on a mechanical counter of the wet type water meter and reads the water through an M-Bus.

Generally, a photoelectric absolute position coding circuit and an M-Bus interface circuit of an M-Bus wet-type photoelectric direct-reading water meter are both installed in a mechanical counter of the wet-type water meter and are continuously influenced by water pressure changes, electrolytic corrosion can occur between conductors (welding points, through holes, conducting wires and pins) on a circuit board under the influence of various factors (pressure changes, temperature changes, aging of sealing materials and continuous electrification) of the circuit board in the counter, and once the electrolytic corrosion reaches a degree of influencing the functions of the circuit, the product can be possibly broken down.

The degree of electrolytic corrosion is related to the resistance between conductors on the circuit board, the voltage between the conductors, the conduction time of the conductors, the lower the resistance, the higher the voltage, the longer the conduction time, and the deeper the degree of electrolytic corrosion.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an electrolytic corrosion resistant method for an M-Bus (remote meter reading system) wet-type photoelectric direct-reading water meter, which enables the power supply time of an M-Bus to be insensitive and has lower failure rate caused by electrolytic corrosion compared with the common M-Bus wet-type photoelectric direct-reading water meter.

In order to solve the technical problems, the invention adopts the following technical scheme:

The invention provides an anti-electrolytic corrosion method of an M-Bus wet-type photoelectric direct-reading water meter, which comprises the following steps:

Step 1, dividing a circuit in a water meter counter into a communication module and a photoelectric coding module, wherein the photoelectric coding module is arranged on the counter in the water meter, the communication module is arranged outside the water meter with a relatively good environment, the communication module is connected with an M-Bus, and the communication module is connected with the photoelectric coding module through a connecting component;

step 2, electrifying the M-Bus, starting the work of electrifying and resetting the communication module, not electrifying the photoelectric coding module, and keeping all electric connection conductors in the connecting component at a zero level potential;

step 3, when the M-Bus commands to read the meter, the photoelectric coding module is electrified for reading once, and then the photoelectric coding module is electrified;

and 4, powering off the M-Bus.

further, in step 1, the photoelectric coding module comprises a photoelectric coding circuit board; the communication module comprises an M-Bus interface circuit board.

further, in step 1, the communication module and the photoelectric encoding module are both provided with independent singlechips.

Further, in step 2, after the M-Bus is powered on, the communication module is always in a power-on working state until the M-Bus is powered off.

Further, in step 2, the voltage of 24V-36V is switched on when the M-Bus is powered on.

Further, in step 2, the electrical connection conductors in the connection assembly are at the same potential only in the case of a non-native meter reading command.

Further, in step 3, when the M-Bus is powered on, the photoelectric encoding module is electrified only under the condition of a local meter reading command, and is not electrified under other conditions.

further, in step 3, the time for the photoelectric coding module to perform power-on reading once is 0.1S-1S, and the power-on voltage is 2.2V-5V each time.

Further, after the M-Bus is powered on, the steps 3 and 4 are repeatedly executed until the M-Bus is powered off.

compared with the prior art, the invention has the beneficial effects that:

The embodiment of the invention divides the circuit of the M-Bus wet-type photoelectric direct-reading water meter into a communication module and a photoelectric coding part, the communication module outside the water meter is connected with the Bus voltage, and because the working environment is relatively good, although the electrifying time is long and the connection voltage is high, the resistance between conductors is large, the electrolytic corrosion speed is relatively low, and the failure rate is relatively low.

The photoelectric coding module in the water meter counter is electrified and works once only when the M-Bus command reads the meter, although the resistance between conductors is small, the electrifying time is short, the access voltage is low, the electrolytic corrosion speed is relatively low, and the failure rate is relatively low.

compared with the common M-Bus wet-type photoelectric direct-reading water meter, the water meter provided by the embodiment of the invention is insensitive to the power supply time of the M-Bus, and has low failure rate caused by electrolytic corrosion.

Drawings

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a flow chart of a method of an embodiment of the present invention.

Fig. 2 is a schematic block diagram of an embodiment of the present invention.

FIG. 3 is a circuit diagram of an M-Bus according to an embodiment of the present invention.

Fig. 4 is a circuit diagram of a single chip microcomputer of the communication module according to the embodiment of the invention.

FIG. 5 is a power control circuit diagram of the optical coding module according to the embodiment of the present invention.

Fig. 6 is a circuit diagram of a connection port with an optical-electrical encoding module according to an embodiment of the present invention.

Fig. 7 is a circuit diagram of a single chip microcomputer of the photoelectric coding module according to the embodiment of the invention.

Detailed Description

In order to better illustrate the content of the invention, the invention is further verified by the following specific examples. It should be noted that the examples are given for the purpose of describing the invention more directly and are only a part of the present invention, which should not be construed as limiting the invention in any way.