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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

Active Publication Date: 2012-01-04
浙江正泰中自控制工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It cannot be practically applied, which limits the promotion of M-BUS in China to a certain extent

Method used

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

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Embodiment Construction

[0024] Such as figure 1 and figure 2 As shown, M-BUS+ and M-BUS- are the M-BUS interfaces of the master station, which are connected with the sending circuit of the M-BUS master station and are the external M-BUS master station interfaces. The M-BUS of the present invention is equipped with an electric M-BUS master station receiving circuit, including a flow monitoring unit, a DA circuit, a comparator, a current / voltage conversion circuit, and the current monitoring unit monitors the loop current in real time, and the DA conversion circuit generates the current of the comparator. Reference voltage, the comparator compares the reference voltage generated by the DA conversion circuit with the voltage generated by the current / voltage conversion circuit to obtain the current change on the M-BUS circuit and obtain the data returned by the module.

[0025] The current monitoring unit of the present invention is dynamically detected by the single-chip microcomputer U2 to monitor th...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08C19/00
Inventor 黄永忠沈秀强肖存通
Owner 浙江正泰中自控制工程有限公司
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