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Current conversion circuit, inertial navigation device, control method of current conversion circuit, and storage medium

A technology for converting circuits and outputting currents, applied in directions such as navigation through speed/acceleration measurement, which can solve problems such as high power consumption of circuits, and achieve the effects of reducing power consumption, wide application, and broad application prospects

Pending Publication Date: 2021-01-22
HUNAN AEROSPACE ELECTROMECHANICAL EQUIP & SPECIAL MATERIAL INST
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Problems solved by technology

[0005] The problem to be solved by the present invention is to provide an acceleration sensor output current conversion circuit for the problem of high power consumption of the existing I / F conversion circuit, which is mainly used in inertial navigation systems

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  • Current conversion circuit, inertial navigation device, control method of current conversion circuit, and storage medium
  • Current conversion circuit, inertial navigation device, control method of current conversion circuit, and storage medium
  • Current conversion circuit, inertial navigation device, control method of current conversion circuit, and storage medium

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Embodiment Construction

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings of the present application. Apparently, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0053] like figure 2 As shown, the present invention provides an acceleration sensor output current conversion circuit, including an integration circuit 10 , a single constant current source circuit 20 , an A / D conversion circuit 4 , and a controller 5 .

[0054] The integration circuit 10 is used to convert the output current of the accelerometer into a corresponding integration voltage. The integrating circuit 10 includes a first operational amplifier 1 and a f...

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Abstract

The invention provides an acceleration sensor output current conversion circuit, an inertial navigation device, a control method of the acceleration sensor output current conversion circuit, and a computer storage medium. The output current conversion circuit comprises a first operational amplifier, a first capacitor, an A / D conversion circuit, a controller, a constant current source and a secondoperational amplifier; one end of a first switch, one end of a second switch, one end of a third switch and one end of a second capacitor are electrically connected; one end of a fourth switch, one end of a fifth switch and the other end of the second capacitor are electrically connected; the other end of the first switch is electrically connected with a first positive voltage power supply end through the constant current source; the other end of the second switch and the inverted input end and the output end of the second operational amplifier are electrically connected with each other; the other end of the third switch and the other end of the fifth switch are electrically connected with the inverting input end of the first operational amplifier; the other end of the fourth switch and the in-phase input end of the second operational amplifier are grounded; and the control end of each switch is electrically connected with the controller.

Description

technical field [0001] The invention relates to an I / F (current / frequency) conversion circuit, in particular to an output current conversion circuit applied to an accelerometer measurement circuit in an inertial navigation system. Background technique [0002] The accelerometer is the core device of the inertial navigation system. The output signal of the accelerometer is an analog current. In order to facilitate the navigation computer to collect and process the output signal of the accelerometer, an I / F conversion circuit is required. The I / F circuit is a circuit that converts analog current into a digital frequency signal. At present, the I / F conversion circuit is quite mature. Because the output current of the accelerometer is bipolar, the existing I / F conversion circuit is generally It adopts a combination of double constant current source, integrating circuit and A / D conversion circuit, such as figure 1 shown. [0003] like figure 1 As shown, the principle of the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/16
CPCG01C21/16
Inventor 樊洁琼唐琼徐辉煌
Owner HUNAN AEROSPACE ELECTROMECHANICAL EQUIP & SPECIAL MATERIAL INST
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