Weighing device with temperature sensing function and temperature compensation method thereof

Patent metadata

Field	Value
Publication number	US-12480805-B2
Application number	US-202318321849-A
Country	US
Kind code	B2
Filing date	May 23, 2023
Priority date	Feb 3, 2023
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

A temperature compensation method for a weighing device, wherein the scale is provided with a temperature sensor, the method is performed by a processor, and includes, when the scale is powered on: receiving a first ambient temperature from the temperature sensor at a first time point; receiving a second ambient temperature from the temperature sensor at a second time point; obtaining a first compensation value associated to a default temperature threshold and a relationship between the first ambient temperature and the second ambient temperature, and obtaining a cumulative compensation value updated by the default temperature threshold; and obtaining a calibrated target temperature that is a target temperature of a subject sensed by the temperature sensor being calibrated by the cumulative compensation value, wherein the first time point is earlier than the second time point. The present disclosure also provides a weighing device with temperature sensing function.

First claim

What is claimed is:

1 . A temperature compensation method for a weighing device, wherein the weighing device comprises a scale, a temperature sensor and a processor, the temperature sensor is positioned on a weighing surface of the scale or positioned within the scale, the processor is disposed internally or externally to the scale, and the method is performed by the processor and comprises:
receiving a first ambient temperature from the temperature sensor at a first time point; receiving a second ambient temperature from the temperature sensor at a second time point; obtaining a first compensation value associated to a default temperature threshold and a relationship between the first ambient temperature and the second ambient temperature, and obtaining a cumulative compensation value updated by the default temperature threshold; and obtaining a calibrated target temperature that is a target temperature of a subject sensed by the temperature sensor being calibrated by the cumulative compensation value; wherein the first time point is earlier than the second time point.

2 . The temperature compensation method for weighing device according to claim 1 , wherein obtaining the first compensation value associated to the default temperature threshold and the relationship between the first ambient temperature and the second ambient temperature comprises:
when the first ambient temperature is higher than the second ambient temperature, and a temperature difference between the first ambient temperature and the second ambient temperature is not lower than the default temperature threshold, obtaining the first compensation value associated to the temperature difference, the default temperature threshold and a first default compensation coefficient; and when the first ambient temperature is not higher than the second ambient temperature and the temperature difference between the first ambient temperature and the second ambient temperature is not lower than the default temperature threshold, obtaining the first compensation value associated to the temperature difference, the default temperature threshold and a second default compensation coefficient.

3 . The temperature compensation method for weighing device according to claim 2 , further comprising, when the first ambient temperature is higher than the second ambient temperature and the temperature difference between the first ambient temperature and the second ambient temperature is not lower than the default temperature threshold:
obtaining a temperature range by the cumulative compensation value; and obtaining the first default compensation coefficient from a plurality of default candidate compensation coefficients associated to the temperature range.

4 . The temperature compensation method for weighing device according to claim 2 , further comprising, when the first ambient temperature is not higher than the second ambient temperature and the temperature difference between the first ambient temperature and the second ambient temperature is not lower than the default temperature threshold:
obtaining a temperature range by the second ambient temperature; and obtaining the second default compensation coefficient from a plurality of default candidate compensation coefficients associated to the temperature range.

5 . The temperature compensation method for weighing device according to claim 2 , wherein the temperature difference is obtained by subtracting the second ambient temperature from the first ambient temperature, and obtaining the first compensation value associated to the temperature difference, the default temperature threshold and the first default compensation coefficient comprises:
obtaining a quotient that is by the temperature difference divided by the default temperature threshold; and obtaining the first compensation value that is an opposite number of the quotient multiplied by the first default compensation coefficient.

6 . The temperature compensation method for weighing device according to claim 2 , wherein the temperature difference is obtained by subtracting the first ambient temperature from the second ambient temperature, and obtaining the first compensation value associated to the temperature difference, the default temperature threshold and the second default compensation coefficient comprises:
obtaining a quotient that is the temperature difference divided by the default temperature threshold; and obtaining the first compensation value that is the quotient multiplied by the second default compensation coefficient.

7 . The temperature compensation method for weighing device according to claim 1 , wherein the first time point and the second time point are separated by a default time interval, and the method further comprising:
receiving a third ambient temperature from the temperature sensor at a third time point; obtaining a second compensation value associated to the default temperature threshold and a relationship between the second ambient temperature and the third ambient temperature; updating the cumulative compensation value that is by adding the second compensation value to the cumulative compensation value; and obtaining an another calibrated target temperature that is an another target temperature sensed by the temperature sensor being calibrated by the cumulative compensation value; wherein the third time point is later than the second time point by the default time interval.

8 . The temperature compensation method for weighing device according to claim 1 , further comprising:
when a temperature difference between the first ambient temperature and the second ambient temperature is lower than the default temperature threshold, the first compensation value is set as zero.

9 . The temperature compensation method for weighing device according to claim 1 , wherein the default temperature threshold is associated with a value a temperature resolution of the temperature sensor.

10 . The temperature compensation method for weighing device according to claim 2 , wherein the processor is connected to a cloud database, and a plurality of cooling compensation coefficient tables and a plurality of non-cooling compensation coefficient tables corresponding to a plurality of subject categories are stored in the cloud database, a plurality of temperature ranges and a plurality of default candidate compensation coefficients corresponding to the plurality of temperature ranges are recorded in each of the plurality of cooling compensation coefficient tables and the non-cooling compensation coefficient tables, and the method further comprises:
updating a default candidate compensation coefficient of one of the plurality of cooling compensation coefficient tables and the plurality of non-cooling compensation coefficient tables by a command, or obtaining a selected target subject category from the plurality of subject categories by the command; obtaining a target cooling compensation coefficient table from the plurality of cooling compensation coefficient tables and a target non-cooling compensation coefficient table from the plurality of non-cooling compensation coefficient tables corresponding to the selected target subject category; and obtaining the first default compensation coefficient by the target cooling compensation coefficient table or obtaining the second default compensation coefficient by the target non-cooling compensation coefficient table.

11 . A weighing device with temperature sensing function, comprising:
a scale having a weighing surface, and a subject being carried by the scale selectively; a temperature sensor positioned on the weighing surface of the scale or positioned with

Assignees

• Wistron Corp

Inventors

• Chen Chun-Ting
• Fang Chun-Wei
• Liang Tun-Kai
• Huang Kung-Chih

Classifications

• G01G23/01 Primary

  Testing or calibrating of weighing apparatus · CPC title

• G01K15/005

  Calibration · CPC title

• G01K1/20

  Compensating for effects of temperature changes other than those to be measured, e.g. changes in ambient temperature · CPC title

• G01G23/48 Primary

  Temperature-compensating arrangements (G01G1/14, G01G1/42, G01G3/18 take precedence) · CPC title