A multi-channel ad acquisition device that does not interfere with each other between multiple machines

A collection equipment, non-interference technology, applied in the field of multi-channel AD collection equipment, can solve problems such as sampling error, achieve the effect of improving function expansion, improving equipment reliability, and maintaining equipment inheritance
CN109462401BActive Publication Date: 2022-07-05SHANGHAI AEROSPACE COMP TECH INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI AEROSPACE COMP TECH INST
Publication Date
2022-07-05

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Abstract

The invention discloses a multi-channel AD acquisition device that does not interfere with each other between multiple machines, which can support simultaneous sampling of the multi-channel AD acquisition devices. Each AD acquisition device includes: an input end matching resistance-capacitance network for input analog quantity The signal is filtered by RC to realize multi-machine fault isolation; the two-stage multi-channel switch switching circuit is used to realize the switching of external analog input channels; the voltage follower is used to buffer and isolate the signal output by the multi-channel switch; AD sampling A circuit for performing multi-bit AD conversion on the analog signal output by the voltage follower; a sampling synchronization circuit for coordinating the sampling beats of multiple machines to ensure the difference in sampling time; an FPGA control circuit for the entire sampling chain The timing control of the sampling mode is realized according to the hardware and software status. The invention eliminates the mutual interference between redundant devices and sampling channels, and ensures the sampling accuracy of each device.
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Description

technical field

[0001] The invention belongs to the technical field of satellite on-board electronic equipment, and in particular relates to a multi-channel AD acquisition device that does not interfere with each other between multiple machines. Background technique

[0002] During the operation of the satellite in orbit, the ground station grasps the basic status and information of its flight through satellite-to-ground telemetry, and these telemetry data are usually the power supply telemetry values, temperature, working current and other analog quantities of various subsystems and single units of the satellite platform. After receiving and AD conversion processing by on-board computer or telemetry acquisition equipment, it is arranged according to the specified format.

[0003] In order to ensure the reliability of analog telemetry data acquisition and processing, these acquisition devices usually carry out multi-machine backup designs such as double-click redundancy and ...

Claims

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