Receiving circuit of meter-BUS (M-BUS) master station and data receiving method for receiving circuit

A technology of M-BUS and receiving circuit, which is applied in the field of receiving circuit and data receiving of M-BUS master station, can solve the problems that cannot be practically applied, limit the promotion of M-BUS, etc., and achieve the convenience of large-scale production and debugging, and stable communication Reliable, easy-to-test results
CN102306444AActive Publication Date: 2012-01-04浙江正泰中自控制工程有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
浙江正泰中自控制工程有限公司
Publication Date
2012-01-04

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Abstract

The invention discloses a receiving circuit of a meter-BUS (M-BUS) master station and a data receiving method for the receiving circuit, and aims to provide a receiving circuit, which is stable and reliable and has a self-adaptive communication band rate, of the M-BUS master station and the data receiving method for the receiving circuit. In order to solve the problem, the receiving circuit of the M-BUS master station comprises a current monitoring unit, a digital-to-analog (DA) conversion circuit, a comparator and a current / voltage conversion circuit, wherein the current monitoring unit monitors loop current in real time; the DA conversion circuit produces a reference voltage of the comparator; and the comparator compares the reference voltage produced by the DA conversion circuit with voltage produced by the current / voltage conversion circuit to obtain current change of an M-BUS circuit and module return data.
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Description

technical field

[0001] The invention relates to a receiving circuit and a data receiving method of an M-BUS master station. Background technique

[0002] As a widely used communication method, M-BUS is widely used in the field of centralized meter reading. It is a high-reliability, high-speed, and cheap bus architecture specially used for remote meter reading. It has a series of advantages such as non-polarity of the two buses, no topological requirements for wiring, self-powered bus, strong anti-interference ability, many relay stages, many terminals, simple and reliable, etc. It is the best bus standard for current automatic meter reading system. The existing M-BUS master station receiving circuit mostly utilizes the feedback current detection circuit made by the capacitance hysteresis effect. The application range of this circuit is limited. When there are multiple consecutive 0s in the communication protocol, a communication error will occur, and the baud rate range is...

Claims

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