Double voltage level compatible receiving remote control command interface circuit for satellite

Abstract

The invention relates to a double voltage level compatible receiving remote control command interface circuit for a satellite, and the circuit comprises a high voltage command and low voltage command logic OR circuit formed by isolating diodes, a resistance voltage division circuit, a relay and a coil protecting circuit of the relay. The isolating diodes is connected with the command interface circuit in series, so as to play a role of isolation and protection. The resistance voltage division circuit performs voltage division on an inputted high voltage command signal, so that the actual received transient voltage and steady state voltage on the relay is less than the maximum input voltage of the same, and a low voltage command signal is directly applied to two ends of the relay coil. For avoiding the voltage of the relay coil exceeding to the rated value of the same, the relay coil is connected with a coil in parallel to protect the circuit, when the relay coil is shut off, the protecting circuit clamps the back EMF to restrain a transient effect of the back EMF. According to the invention, the interface circuit can realize a function of compatibly receiving command level of the two voltages, at least a half of relays are saved, the components of the circuit is conventional, the circuit is simple, the availability is good, and the reliability is high.

Description

technical field [0001] The invention relates to an electronic circuit, in particular to an interface circuit used for receiving remote control commands of spacecraft. Background technique [0002] The rapid development of spacecraft puts forward higher and higher requirements for its remote control system, especially with the gradual strengthening of the complexity and function of satellite measurement and control functions, higher requirements are put forward for the miniaturization of the satellite-borne command receiving circuit. The miniaturization of the interface circuit requires it to reduce the complexity of the interface circuit and improve the reliability of the interface circuit at the same time. [0003] Conventional remote control command interface such as figure 1 As shown in the figure, the left box in the figure is the command output terminal circuit, and the right box is the command user terminal circuit. The command output terminal provides command drive f...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide an interface circuit that is compatible to receive two or more voltages, has a small number of relays, is simple to implement, and has high reliability. Only one type of relay is used. The interface circuit that can receive two or more command voltages solves the problem of complex circuits and large volume when the command user terminal is faced with multiple commands

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