Method for measuring energy efficiency of a quantitative weighing device

Patent metadata

Field	Value
Publication number	US-12098948-B2
Application number	US-202117445233-A
Country	US
Kind code	B2
Filing date	Aug 17, 2021
Priority date	Aug 20, 2020
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

A method is provided for measuring an energy efficiency of a quantitative weighing device. A data measurement part is formed by: recording a control time of fast charging, recording a control time of slow charging, recording a comparison prohibition time, and recording weighing data. A current device reliability parameter, a fast charging feed flow, and a slow charging feed flow are calculated, based on the comparison prohibition time and the control time of slow charging. The fastest feed time under a requirement of a target reliability parameter is calculated as the difference between the target reliability parameter and the calculated control reliability parameter. By using the method, application data, such as capability of a quantitative control device and energy efficiency of the quantitative weighing device, can be intuitively obtained. This facilitates commissioning, maintenance, and use of the quantitative weighing control device.

First claim

What is claimed is:

1. A method for measuring and optimizing energy efficiency of a quantitative weighing device of a package charging system, said method comprising:
operating the package charging system over multiple packaging charging runs, including recording data from the quantitative weighing device over said multiple packaging charging runs, to form a data measurement part comprising:
a control time of fast charging (Ft),
a control time of slow charging (St),
a comparison prohibition time (Ht), and
weighing data (Wt);

calculating, at an electronic device associated with the package charging system, using the comparison prohibition time (Ht) and the control time of slow charging (St) and for each of the multiple measurements, feed times for charging a material at the quantitative weighing device, where a slow charging off weight threshold is ignored during the comparison prohibition time (Ht) for purposes of operating the show charging feed:
a control reliability parameter (Y) of the quantitative weighing device,
a fast charging feed flow (Cf), and
a slow charging feed flow (Cs);

calculating, at the electronic device associated with the package charging system, a fastest feed time of candidate combinations of the fast charging feed flow (Cf) for a first amount of time and the slow charging feed flow (Cs) for a second amount of time where the slow charging off weight threshold is ignored during the comparison prohibition time (Ht) and an absolute difference between a target reliability parameter and the calculated control reliability parameter (Y) under a predetermined threshold; and
as part of a further packaging charging run, charging the material at the package charging system, including by way of the quantitative weighing device, in accordance with a combination of the candidate combinations resulting in the fastest feed time.

2. The method of claim 1 , wherein the comparison prohibition time (Ht) is obtained by:
checking, at the electronic device associated with the package charging system, whether a slow charging off moment is after a fast charging off moment; and
searching, at the electronic device associated with the package charging system, in reverse time from a slow charging off moment, for a moment at which a weight measurement is greater than or equal to the slow charging off weight threshold, starting from the slow charging off moment and taking the slow charging off weight threshold as a standard, until a fast charging off moment, such that:
if the moment is found, this moment is recorded; or
if the moment is not found, the fast charging off moment is recorded, wherein a time from the fast charging off moment to the moment that is recorded is the comparison prohibition time (Ht).

3. The method of claim 2 , further comprising the steps of:
performing, at the electronic device associated with the package charging system, a statistical calculation of the measurement data part, including Ft[N], St[N], Ht[N], and Wt[N], to obtain averages FtA, StA, HtA, and WtA and standard deviations FtS, StS, HtS, and WtS, wherein Ft represents the control time of fast charging, St represents the control time of slow charging, Ht represents the comparison prohibition time, Wt represents the weighing data, and N is a natural number.

4. The method of claim 3 , further comprising the steps of:
obtaining, at the electronic device associated with the package charging system, a least squares solution of feed capability of the weighing device by solving an equation system for the fast charging feed flow (Cf) and the slow charging feed flow (Cs), wherein the equation system comprises:
assuming, by way of the electronic device associated with the package charging system, the fast charging feed flow (Cf) and the slow charging feed flow (Cs) satisfy the equation system:

Ft
⁡

[
1
]

×
Cf

+

St
⁡

[
1
]

×
Cs

=

Wt
⁡

[
1
]

;

⁢

⁢

Ft
⁡

[
2
]

×
Cf

+

St
⁡

[
2
]

×
Cs

=

Wt
⁡

[
2
]

;

⁢

⁢

⋮
⁢

⁢
⋮
⁢

⁢
⋮

⁢

⁢

Ft
⁡

[

N
-
1

Assignees

• Mettler Toledo Changzhou Prec Instruments Co Ltd
• Mettler Toledo Changzhou Measurement Tech Co Ltd
• Mettler Toledo Int Trading Shanghai Co Ltd

Inventors

• Wang Shenhui
• Wan Qi
• Wang Jingke
• Zhang Yu
• Zhao Yupeng

Classifications

• G01G19/414

  using electronic computing means only · CPC title

• G01G13/04 Primary

  involving dribble-feed means controlled by the weighing mechanism to top up the receptacle to the target weight · CPC title

• B65B57/20

  Applications of counting devices for controlling the feed of articles (other applications B65B65/08) · CPC title

• G01G13/003

  Details; specially adapted accessories (details of weighing apparatus in general G01G21/00; auxiliary devices for weighing apparatus in general G01G23/00) · CPC title

• G01G13/2852

  involving dribble-feed means controlled by the weighing mechanism to top up the receptacle to the target weight · CPC title