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Serial signal communication method, communication circuit and apparatus therefor

A serial signal and communication circuit technology, applied in the field of signal transmission, can solve problems such as signal errors at the receiving end, device burnout, and products that cannot meet elevator communication requirements.

Active Publication Date: 2009-01-07
HITACHI BUILDING TECH GUANGZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Serial communication technology is a relatively mature communication technology. For example, when the data element in the serial communication signal is "0", the transmission line is at low level. When the data element in the serial communication signal is "1", The transmission line is high level, and the existing serial communication technology is mainly low-speed or non-isolated serial communication mode; in specific occasions, the signal transmission environment is extremely complicated, such as the elevator serial communication process, due to environmental conditions Complexity, the existing products can no longer meet the communication requirements of the elevator environment;
[0003] At the same time, due to the presence of interference signals between long-distance transmission lines and the presence of capacitance between transmission lines, high-speed digital communication will be distorted, resulting in signal errors at the receiving end, and even causing device burnout when the voltage exceeds the device's use range;

Method used

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  • Serial signal communication method, communication circuit and apparatus therefor
  • Serial signal communication method, communication circuit and apparatus therefor
  • Serial signal communication method, communication circuit and apparatus therefor

Examples

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Embodiment 1

[0028] As shown in Figure 1, a serial signal communication circuit, the communication circuit includes a sending signal processing module, a sending circuit, a transmission line L and a receiving circuit, the sending circuit includes a pulse transformer T1, and the receiving circuit includes a pulse transformer T2, a comparison circuit and a filter Processing circuit; the two ends of the primary coil of the pulse transformer T1 are connected to the two output terminals of the transmission signal processing module, the middle section of the primary coil is connected to the reference voltage input terminal VPS, the two ends of the secondary coil are connected to two transmission lines L, and the two The root transmission line L is connected to the primary coil of the pulse transformer T2, and the secondary coil of the pulse transformer T2 is connected to the comparison circuit.

[0029] Wherein, the communication circuit also includes a second sending signal processing module and...

Embodiment 2

[0044] As shown in Figure 4, in this embodiment, the comparison circuit includes a comparator Vout and two unidirectional elements D1 and D2 facing the comparator Vout, and the two ends of the secondary coil of the pulse transformer T2 are respectively connected to the two unidirectional elements D1 , and the front end of D2 are connected, the rear ends of the unidirectional elements D1 and D2 are simultaneously connected to one of the input terminals of the comparator Vout, and the other input terminal of the comparator Vout is connected to the reference voltage input terminal Vref.

Embodiment 3

[0046] As shown in Figure 5, the difference between this embodiment and Embodiment 1 is that, figure 2 There are multiple communication devices shown, all of which are connected by transmission lines to realize serial communication between them.

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Abstract

The invention discloses a serial signal communication method, a communication circuit and a communication device which are used in the method, the communication circuit comprises a transmitting signal processing module, a transmitting circuit, transmission lines L and a receiving circuit, the transmitting circuit comprises a pulse transformer T1, the receiving circuit comprises a pulse transformer T2 and a comparison circuit; the two ends of a primary coil of the pulse transformer T1 are connected with two output ends of the transmitting signal processing module, the middle section of the primary coil is connected with a reference voltage input end VPS, the two ends of a secondary coil are connected with two transmission lines L, the two transmission lines L are connected with the primary coil of the pulse transformer T2, and the secondary coil of the pulse transformer T2 is connected with the comparison circuit. The serial signal communication method uses 'zero-level' to transmit '1' signal and uses 'positive level' or 'negative level' to transmit '0' signal; as the pulse transformers are adopted, the transmission efficiency is high, and the anti-interference ability is strong.

Description

technical field [0001] The invention relates to the field of signal transmission, in particular to a serial signal communication method, a communication circuit and a communication device used in the method. Background technique [0002] Serial communication technology is a relatively mature communication technology. For example, when the data element in the serial communication signal is "0", the transmission line is at low level. When the data element in the serial communication signal is "1", The transmission line is high level, and the existing serial communication technology is mainly low-speed or non-isolated serial communication mode; in specific occasions, the signal transmission environment is extremely complicated, such as the elevator serial communication process, due to environmental conditions Complexity, the existing products can no longer meet the communication requirements of the elevator environment; [0003] At the same time, due to the presence of interfe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04B14/00
Inventor 仲兆峰苏柏垣刘海潮郭伟文
Owner HITACHI BUILDING TECH GUANGZHOU CO LTD