A Bandwidth Expansion Method of Strain Gauge Torque Meter Based on Least Squares Complex Exponential Method
A technology of least squares and bandwidth expansion, which is applied in the direction of force/torque/power measuring instrument calibration/testing, instruments, and measuring devices. It can solve the problems of reducing bandwidth, small cut-off frequency, and reducing the measurement performance of torque meters. Achieve the effect of expanding bandwidth and improving accuracy
Active Publication Date: 2022-05-20
TIANJIN UNIV
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The cut-off frequency selected by this empirical estimation method is small, although the oscillation signal is filtered out to make the passband flat, but it also greatly reduces the bandwidth and reduces the measurement performance of the torque meter
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
[0083] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0084] The strain gauge torque meter bandwidth expansion method based on the least squares complex exponential method provided by the present invention is composed of the following parts:
[0085] In the first part, the modal parameter identification is carried out using the least squares complex exponential method;
[0086] Step 101: Load the measurement system, use an impact hammer to apply impact torque to the torque meter before the system performs measurement, and collect the torque signal output by the torque meter;
[0087] Step 102: Select the data segment h representing the free response of the torque meter in the collected signal n (n=0,1,2...);
[0088] Step 103: Put h ...
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
The invention discloses a strain gauge torque meter bandwidth expansion method based on the least squares complex exponential method, which includes step 1, using the least squares complex exponential method to identify modal parameters; and step 2, designing digital parameters according to the identified modal parameters The correction unit includes a comb filter and a low-pass filter, and uses this to calibrate the torque meter. This method can identify the modal parameters of the torque meter according to the least squares complex exponential method, and then design a digital correction unit according to the modal parameters such as the damping natural frequency and damping ratio, and accurately correct the frequency band near the natural frequency point to ensure that within the passband The amplitude-frequency response tends to a constant value, thereby expanding the frequency band.
Description
technical field [0001] The invention belongs to the technical field of instruments and meters, in particular to a method for expanding the bandwidth of a strain gauge torque meter based on the least squares complex exponential method. Background technique [0002] The measuring principle of the strain gauge torque meter is the strain effect. When the torque is applied, the strain gauge is torsionally deformed along with the measuring shaft, and its resistance value changes accordingly; the torsion angle of the measuring shaft can be obtained by measuring the resistance value of the strain gauge; according to the torsion angle and the torsional elastic modulus of the measuring shaft, it can be Calculate the measured torque. When the measuring shaft and strain gauge with small torsional elastic modulus are selected, the torque meter has high sensitivity and can be used for small moment measurement. [0003] An important part of motor performance testing is to measure the mag...
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): G01L25/00
CPCG01L25/003
Inventor 段发阶刘昌文傅骁谢琛
Owner TIANJIN UNIV