US 12,259,492 B2
Zero-phase calibration method, computer device and storage medium
Xinhua Zhou, Hunan (CN)
Assigned to Tunkia Co., Ltd., Hunan (CN)
Appl. No. 18/721,717
Filed by Tunkia Co., Ltd., Hunan (CN)
PCT Filed Nov. 10, 2022, PCT No. PCT/CN2022/131224
§ 371(c)(1), (2) Date Jun. 19, 2024,
PCT Pub. No. WO2024/098342, PCT Pub. Date May 16, 2024.
Prior Publication US 2025/0004102 A1, Jan. 2, 2025
Int. Cl. G01S 7/40 (2006.01); G01R 35/00 (2006.01)
CPC G01S 7/4008 (2013.01) [G01R 35/005 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A zero-phase calibration method for calibrating zero-phase points between different channels of signals of a wide-range meter, including:
step S1, selecting a group of range combinations with a range and a group of adjacent range combinations consisting of the range and a smaller range adjacent to the range between different channels A and B of the wide-range meter outputting signals with the full-scale amplitude of the smaller range to the channels A and B of the wide-range meter by a standard source, measuring phase calibration parameters PHSASB(1,1), PHSASB (1,2), . . . , PHSASB (i,i), PHSASB(i,i+1), . . . , PHSASB (n,n) between channel signals SA, SB of the group of range combinations with the range as well as between channel signals SA, SB of the group of adjacent range combinations, wherein n is the number of measurement ranges of the wide-range meter, i is an integer and 1≤i≤n−1;
step S2, accomplishing measurements of phase calibration parameters of all of the group of range combinations with the range and the group of adjacent range combinations, and storing the measured phase calibration parameters in a memory;
step S3, invoking the measured phase calibration parameters stored in the memory, according to the equation PHSASB(i1,j1)+PHSASB(i2,j2)=PHSASB(i1,j2)+PHSASB(i2,j1), calculating PHSASB(i+1,i) by use of the formula PHSASB(i+1,i)=PHSASB(i,i)+PHSASB(i+1,i+1)−PHSASB(i,i+1), and calculating PHSASB(j+2,j) by use of the formula PHSASB(j+2,j)=PHSASB(j+1,j)+PHSASB(j+2,j+1)−PHSASB(j+1,j+1), calculating PHSASB(j,j+2) by use of the formula PHSASB(j,j+2)=PHSASB(j,j+1)+PHSASB(j+1,j+2)−PHSASB(j+1,j+1), wherein j=1, . . . , n−2, calculating phase calibration parameters between the channel signals SA, SB of each of the remaining range combinations of the wide-range meter level by level;
step S4, storing the calculated phase calibration parameters in the memory; and
step S5, invoking corresponding phase calibration parameters stored in the memory to calibrate the zero-phase points between different channels of signals of the meter while calibrating the wide-range meter.