A method for temperature compensation of quartz resonance differential accelerometer
An accelerometer and temperature compensation technology, applied in the direction of measuring acceleration, speed/acceleration/shock measurement, speed/acceleration/shock measurement equipment testing/calibration, etc., can solve the problems of long cycle and high hardware compensation cost, and achieve compensation speed Fast, precise results
Active Publication Date: 2022-02-22
XI'AN PETROLEUM UNIVERSITY
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
From the perspective of engineering application, the cost of hardware compensation is relatively high and the cycle is long; therefore, software compensation is usually performed by establishing an accurate temperature compensation model
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0028] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0029] refer to figure 1 , a quartz resonance differential accelerometer temperature compensation method, comprising the following steps:
[0030] Step 1: Collect the quartz resonant differential accelerometer and apply acceleration a (accelerometer measurement range) at different temperatures (operating temperature range), such as [-40°C, -30°C,...,80°C], such as [- 1g,-0.7g,…,1g], the frequency signal f output by the accelerometer 1 , f 2 , the temperature sensor output signal T; according to the data set at the same temperature T [f 1 ,f 2 , a], using the least squares method to calculate the static mathematical model f of the accelerometer at this temperature 1 -f 2 =K 0 +K 1 *a+K 2 *a 2 Zero bias K 0 , Scale factor K 1 and the second-order nonlinear coefficient K 2 ;Finally obtain the data sources at different temperatures [f ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A temperature compensation method for a quartz resonance differential accelerometer, which collects the frequency signal f output by the accelerometer and the temperature sensor 1 , f 2 With the temperature signal T and acceleration a; calculate the zero bias K of the static mathematical model of the accelerometer at different temperatures 0 , Scale factor K 1 and the second-order nonlinear coefficient K 2 , with f 1 , f 2 , T, a, K 0 、K 1 、K 2 Composition of data sources; select data sources under different temperature and acceleration conditions as the initial sample data, preprocess the sample data, and divide it into training samples and verification samples; set the relevant parameters of the self-increasing extreme learning machine; Increase the input of the temperature compensation model of the extreme learning machine for model learning and verification; input the preprocessed measured frequency signal f 1 , f 2 Perform model prediction with temperature signal T; the invention not only has the advantages of fast compensation speed and self-determined number of hidden layer nodes, but also has the function of accelerometer calibration.
Description
technical field [0001] The invention belongs to the technical field of quartz acceleration sensors, and in particular relates to a temperature compensation method for a quartz resonance differential accelerometer. Background technique [0002] The accelerometer is one of the key components of the inertial navigation system. It is widely used in aerospace, automobile, consumer electronics and other fields. Its performance directly determines the level of navigation accuracy. Quartz resonant differential accelerometer is a kind of micro-mechanical accelerometer processed by MEMS technology, which outputs digital frequency signal. It mainly consists of two identical double-ended fixed quartz tuning forks, a sensitive mass, a mounting base and a damper. When the accelerometer is subjected to acceleration in the sensitive direction, the sensitive mass will be subjected to an axial inertial force of the size F=ma, one of the tuning forks is subjected to tension, and its resonant ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01P15/097G01P21/00
CPCG01P15/097G01P21/00
Inventor 周冠武张庆红李皎康磊
Owner XI'AN PETROLEUM UNIVERSITY