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RS485 dual-bus communication method used for test satellite

A technology of RS485 and communication method, which is applied in the field of RS485 dual-bus communication for experimental satellites, and can solve problems such as the ineffective communication between the on-board computer and the lower computer, and the complexity of the communication between the on-board computer and the lower computer.

Inactive Publication Date: 2011-06-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The inventor found that in the prior art, the communication between the on-board computer and the lower computer is relatively complicated, resulting in the ineffective communication between the on-board computer and the lower computer.

Method used

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  • RS485 dual-bus communication method used for test satellite
  • RS485 dual-bus communication method used for test satellite
  • RS485 dual-bus communication method used for test satellite

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] figure 1 For the experimental satellite of an embodiment of the present invention, use the RS485 dual-bus communication method flowchart, as figure 1 As shown, it includes the following steps:

[0022] S102, using the on-board computer as the host, using the lower computer and the measurement and control answering machine as the slave, and using the first RS485 bus and the second RS485 bus to connect the host and the slave respectively;

[0023] S104,...

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Abstract

The invention discloses an RS485 dual-bus communication method used for a test satellite. The method comprises the following steps: a first RS485 bust and a second RS 485 bus are respectively connected between a satellite-borne computer utilized as a host machine and a lower computer utilized as a slave machine and between the satellite-borne computer and a measurement and control responser utilized as a salve machine; the host machine accesses the slave machines in turns by virtue of the first RS485 bus and the second RS485 bus, the slave machines respectively send response frames by virtue of the first RS485 bus and the second RS485 bus after receiving command frames sent by the host machine; and the host machine transmits data frames to the slave machines by virtue of the first RS485 bus and the second RS485 bus after receiving response signals.

Description

technical field [0001] The invention relates to the field of aerospace communication, in particular to an RS485 dual-bus communication method for test satellites. Background technique [0002] When the communication distance is required to be tens of meters to thousands of meters, the RS-485 serial bus standard is widely used. RS-485 uses balanced transmission and differential reception, so it has the ability to suppress common mode interference. In addition, the bus transceiver has high sensitivity and can detect the voltage as low as 200mV, so the transmission signal can be recovered beyond a kilometer. RS-485 is very convenient for multi-point interconnection, which can save many signal lines. [0003] The inventors found that in the prior art, the communication between the on-board computer and the lower computer is relatively complicated, resulting in the ineffective communication between the on-board computer and the lower computer. Contents of the invention [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/38G06F13/42
Inventor 陈健李冬柏兰盛昌徐国栋
Owner HARBIN INST OF TECH
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