Method for quick weighing of loose and small packages of traditional Chinese medicine (TCM)

Patent metadata

Field	Value
Publication number	US-11635324-B2
Application number	US-202117203443-A
Country	US
Kind code	B2
Filing date	Mar 16, 2021
Priority date	Nov 13, 2020
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

The present disclosure discloses a method for quick weighing of loose and small packages of traditional Chinese medicine (TCM), comprising: 1) establishing an equivalent physical model of a weighing system for loose and small packages, and, through Laplace transformation and Z transformation, obtaining a formula of the mass M of medicine packages to be weighed; 2) calculating a1, a2, b1 and b2 on the basis of a vector prediction error; 3) according to a1, a2, b1, and b2 obtained and the formula of the mass of medicine packages to be weighed, obtaining the mass of the loose and small packages of TCM that are weighed. According to the method, the scalar prediction error is expanded into the vector prediction error based on the traditional method so as to construct a new identification model based on the vector prediction error, and as a result the utilization efficiency of prediction error turns higher.

First claim

What is claimed is:

1. A method for quick weighing of loose and small packages of traditional Chinese medicine (TCM), which is performed by a weighing system comprising a weighing sensor and a processor, comprising:
1) Establishing a calculation model for a mass of medicine packages by the processor, comprising:
establishing an equivalent physical model of a weighing system for loose and small packages:

(

M
+
m

)

⁢

d
⁢

y
⁡
(
t
)

2

d
2

⁢
t

+

c
⁢

d
⁢

y
⁡
(
t
)

d
⁢
t

+

k
⁢

y
⁡
(
t
)

=

Mgu
⁡
(
t
)

(
1
)

wherein, m is the equivalent mass of the medicine receiving tank; M is the mass of medicine packages; y(t) is the output signal of the weighing system; g is the gravitational acceleration; c is the equivalent damping coefficient of the weighing system; k is the equivalent elastic coefficient of the weighing system; when loose and small packages of TCM fall on the medicine receiving tank, the medicine packages will vibrate synchronously with the weighing system represented by the medicine receiving tank, which may be regarded as applying a step signal Mgu(t) to the weighing system, wherein u(t) represents the step signal; after Laplace transformation, the output signal is obtained as follows:

Y
⁡
(
s
)

=

Mg
·

1
s

·

1

(

M
+
m

)

⁢

s
2

+

c
⁢
s

+
k

(
2
)

since the sampled signal is a discrete value, Z transformation is performed for Y(s) so as to obtain:

Y
⁡
(
z
)

=

b
1

⁢

z

-
1

+

b
2

⁢

z

-
2

1
+

a
1

⁢

z

-
1

+

a
2

⁢

z

-
2

Assignees

• Univ Chongqing

Inventors

• Song Yongduan
• Shen Zhixi
• Liu Haifeng
• Lei Jie

Classifications

• G06F17/14

  Fourier, Walsh or analogous domain transformations {, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms (for correlation function computation G06F17/156; spectrum analysers G01R23/16)} · CPC title

• G06F17/11

  for solving equations {, e.g. nonlinear equations, general mathematical optimization problems (optimization specially adapted for a specific administrative, business or logistic context G06Q10/04)} · CPC title

• G01G19/00 Primary

  Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups {(electric measuring arrangements involving comparison with a reference value G01R17/00)} · CPC title

• G06F17/16

  Matrix or vector computation {, e.g. matrix-matrix or matrix-vector multiplication, matrix factorization (matrix transposition G06F7/78)} · CPC title

• G01G23/44 Primary

  Coding devices therefor · CPC title