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A multi-channel constant current source used for calibration of high-precision if conversion module

A technology of conversion module and constant current source, which is applied in the field of inertial navigation, can solve the problems such as no records found, and achieve the effect of improving calibration efficiency

Active Publication Date: 2022-04-12
TIANJIN NAVIGATION INSTR RES INST
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Problems solved by technology

[0004] Through the search of published patent documents, no records of published patent documents related to the application of the present invention were found

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  • A multi-channel constant current source used for calibration of high-precision if conversion module
  • A multi-channel constant current source used for calibration of high-precision if conversion module
  • A multi-channel constant current source used for calibration of high-precision if conversion module

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Embodiment Construction

[0018] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings; the present embodiments are descriptive, not restrictive, and cannot thereby limit the protection scope of the present invention.

[0019] A multi-channel constant current source used in the calibration of high-precision IF conversion modules, the overall block diagram is as follows figure 1 As shown, it is designed as four independent outputs: the first and second groups output 1, 2, 4, 10, 15mA five-speed current; the third and fourth groups output -1, -2, -4, -10, -15mA five gear current. The above-mentioned five-level current of each group can be automatically switched, but the five-level current output by different groups cannot be switched, and the controller controls the gating of the four groups of constant current sources.

[0020] The specific composition of the multi-channel constant current source includes a positive constant cur...

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Abstract

The invention relates to a multi-channel constant current source used for the calibration of a high-precision IF conversion module, comprising a controller and four groups of independent outputs. The third and fourth groups both output ‑1,‑2,‑4,‑10,‑15mA five-speed currents; the five-speed currents of the above-mentioned groups are automatically switched, and the five-speed currents output by different groups They can not be switched, and the controller controls the strobe of four groups of constant current sources; each group of constant current sources is composed of a positive constant current source, a negative constant current source and a single group of switching circuits. The invention can replace the imported reference source and realize the calibration of the high-precision IF conversion module, which not only realizes independent controllability, but also greatly improves the calibration efficiency of the IF conversion module.

Description

technical field [0001] The invention belongs to the technical field of inertial navigation and relates to high-precision IF module calibration and testing technology, in particular to a multi-channel constant current source used for high-precision IF conversion module calibration. Background technique [0002] The IF conversion module is a high-precision current detection module, usually used in combination with a quartz accelerometer, and is a key module in inertial navigation equipment. Usually the IF conversion module needs to be calibrated to achieve high-precision measurement. The calibration of the high-precision IF conversion module mainly relies on the calibration equipment of high-precision reference source, and the calibration equipment industry mostly uses the reference source fluke5730 produced by the American FLUKE company. The price of this equipment Expensive and banned for domestic military units. [0003] At present, the high-precision reference sources use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00G01R35/00
CPCG01C25/005G01R35/007
Inventor 贾廷悦陈星陆菁王强张灵妍
Owner TIANJIN NAVIGATION INSTR RES INST
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