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Sigma-delta type AD-based quartz watch acceleration acquisition system and acceleration acquisition method

A technology of acquisition system and quartz watch, applied in the direction of measurement of acceleration, speed/acceleration/shock measurement, measurement device, etc., can solve the problems of long pulse number output time, many analog devices, long leveling time, etc., to reduce the overall circuit The effect of volume, increased resolution, and increased responsiveness

Inactive Publication Date: 2019-12-31
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many analog devices in the I / F circuit, the volume is too large, the pulse number output time is too long when the small current is input, and the response speed is slow, so the leveling time is long

Method used

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  • Sigma-delta type AD-based quartz watch acceleration acquisition system and acceleration acquisition method

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Embodiment

[0038] like figure 1 As shown, based on the Σ-Δ AD quartz watch acceleration acquisition system, the acquisition system includes a switching circuit, a large-range sampling resistor, a medium-range sampling resistor, a small-range sampling resistor, a preamplifier circuit, a Σ-Δ AD acquisition circuit, Temperature control circuit, FPGA control circuit, serial port output circuit and system power supply;

[0039] Large-range sampling resistors, coarse and medium-range sampling resistors, and small-range sampling resistors are all high-precision low-temperature drift resistors;

[0040] When the current range output by the accelerometer of the quartz watch is -50mA to +50mA, the switching circuit is connected to the large-range sampling resistor;

[0041] When the current range output by the accelerometer of the quartz watch is -1.25mA to +1.25mA, the switching circuit is connected to the mid-range sampling resistor;

[0042] When the current range output by the accelerometer ...

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Abstract

The invention relates to a sigma-delta type AD-based quartz watch acceleration acquisition system and acceleration acquisition method. The quartz watch acceleration acquisition system provided by theinvention is a quartz watch acceleration acquisition system applied to a platform system, in particular to a quartz watch acceleration acquisition system adopting a sigma-delta type AD. The acquisition system comprises a switching circuit, a wide-range sampling resistor, a medium-range sampling resistor, a small-range sampling resistor, a pre-amplification circuit, a sigma-delta type AD acquisition circuit, a temperature control circuit, an FPGA control circuit, a serial port output circuit and a system power source. According to the acquisition system, the response speed of the system to micro current is improved, so that the platform can identify the acceleration state of a current position in real time, leveling time in the platform system is reduced, and launching preparation time is shortened.

Description

technical field [0001] The invention relates to a Σ-Δ AD quartz watch acceleration collection system and a collection method, which is a quartz watch acceleration collection system applied to a platform system, in particular to a Σ-Δ AD quartz watch acceleration collection system. Background technique [0002] The quartz watch accelerometer is the main component for measuring the linear acceleration of the moving carrier, and its measurement response speed and accuracy directly affect the accuracy of inertial navigation. As a part of the accelerometer measurement system, the accelerometer acquisition circuit will directly affect the accuracy of the acceleration information. The traditional quartz watch acceleration acquisition system adopts the I / F circuit method, and uses the built analog circuit to convert the output current into frequency pulse output, which has the characteristics of large signal threshold and strong anti-interference ability. However, the I / F circuit h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P15/097
CPCG01P15/097
Inventor 冯欢王二伟
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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