A bias current main backup switching circuit in a space electric field detection system
A detection system, bias current technology, applied in the direction of electrostatic field measurement, etc., can solve the problems of operating relays, unusable, etc., and achieve the effect of simple implementation, low cost, and strong driving ability
Active Publication Date: 2020-11-27
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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Problems solved by technology
Under some special reasons, when the bias current signal generated by the main and backup components of the electronics box needs to be supplied to the sensor, the command line given by the satellite platform cannot be used to operate the relay
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[0015] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0016] The design principle of the present invention: the primary power input by the satellite platform is converted through the DC-DC secondary power supply module to obtain the required secondary power supply voltage; at the same time, the secondary power output by the DC-DC is separated by arranging the contacts of the relay reasonably. The secondary power supply of the main part and the backup secondary power supply are output, and the switching of the relay uses the command line provided by the satellite platform; the secondary power supply voltage of the main part is supplied to the main part of the electronic box, and the secondary power supply voltage of the backup is supplied to the electronic box for backup; similarly The ground is switching the main and standby bias current signals of the magnetic latching relay, combining the main secondary powe...
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The invention provides a main and backup switching circuit of bias current in a space electric field detection system. Simple and effective targeted design can be carried out by utilization of main and backup establishing of a secondary power supply in equipment. The main and backup switching circuit of the bias current in the space electric field detection system comprises a primary bleeder resistor A (1), a charging and discharging capacitor A (2), a charging and discharging resistor A (3), a current limiting resistor A (4), an NPN type bipolar audion A (5), a current limiting resistor B (6), a suction coil A (7), a primary bleeder resistor B (15), a charging and discharging capacitor B (16), a charging and discharging resistor B (17), a current limiting resistor C (18), an NPN type bipolar audion B (19), a current limiting resistor D (20), a suction coil B (21), a magnetic latching relay (8) and a sensor (9).
Description
technical field [0001] The invention belongs to the technical field of space environment detection, and in particular relates to a circuit design in which a bias current signal suitable for space electric field detection is switched according to the power-on state of the secondary power supply of the main and backup systems. Background technique [0002] The main and backup redundancy of electronic equipment is a common engineering method to improve reliability on satellite platforms. According to whether the main and backup are powered on at the same time, they can be classified into hot backup or cold backup. The hot standby mode is to supply power to the master system (or module, device) and the backup system (or module, device) at the same time to make it work. This method obtains reliability through more energy consumption and life consumption of redundant components. Obviously, it is not advisable for some non-critical equipment on the satellite system where resources...
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IPC IPC(8): G01R29/12
CPCG01R29/12
Inventor 李世勋雷军刚李诚谢朝阳李云鹏宗朝孔风连刘泽杨晓林王鷁
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH