CN114910152B - Precision correction method for weighing metering instrument - Google Patents
Precision correction method for weighing metering instrument Download PDFInfo
- Publication number
- CN114910152B CN114910152B CN202210596923.2A CN202210596923A CN114910152B CN 114910152 B CN114910152 B CN 114910152B CN 202210596923 A CN202210596923 A CN 202210596923A CN 114910152 B CN114910152 B CN 114910152B
- Authority
- CN
- China
- Prior art keywords
- calibration
- channel
- signal
- value
- metering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005303 weighing Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000000694 effects Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000012271 agricultural production Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000036581 peripheral resistance Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/10—Calibration or testing
- H03M1/1009—Calibration
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
The application provides a precision correction method of a weighing metering instrument, wherein the weighing metering instrument comprises a metering signal AD channel, and the method comprises the following steps: constructing a reference signal AD channel which is the same as the metering signal AD channel, and inputting a certain fixed signal into the reference signal AD channel as a calibration signal; recording a calibration AD value in the reference signal AD channel corresponding to the calibration signal during calibration, and calculating a calibration weighing data slope according to the calibration AD value; and correcting the real-time AD value in the metering signal AD channel at a certain temperature based on the calibration AD value and the calibration weighing data slope. The problems that the accuracy of the temperature sensor is changed by adopting a temperature compensation method, and the complex effect of a compensation algorithm is poor are solved.
Description
Technical Field
The invention relates to the technical field of metering instruments, in particular to a precision correction method of a weighing metering instrument.
Background
The weighing instrument is also called a weighing display control instrument, is electronic equipment which converts a weighing sensor signal (or a weight transmitter) into a weight digital display and can transmit, store, count and print weight data, and is commonly used for automatic batching and weighing in industrial and agricultural production so as to improve the production efficiency.
But the slope of an AD processing chip adopted by the existing weighing and metering instrument can be affected by temperature, so that different metering accuracies of using environment temperatures are caused.
Disclosure of Invention
Therefore, the main purpose of the invention is to solve the technical problem that the existing weighing and metering instrument is easily affected by temperature, thereby causing low metering precision.
The invention provides a precision correction method of a weighing and metering instrument, wherein the weighing and metering instrument comprises a metering signal AD channel, and the method comprises the following steps: constructing a reference signal AD channel which is the same as the metering signal AD channel, and inputting a certain fixed signal into the reference signal AD channel as a calibration signal; recording a calibration AD value in the reference signal AD channel corresponding to the calibration signal during calibration, and calculating a calibration weighing data slope according to the calibration AD value; and correcting the real-time AD value in the metering signal AD channel at a certain temperature based on the calibration AD value and the calibration weighing data slope.
Further, wherein the reference signal AD channel is provided in the weighing scale.
Further, an expression for correcting the real-time AD value in the metering signal AD channel at a certain temperature based on the calibration AD value and the calibration weighing data slope is:
wherein W is the AD value in the AD channel of the corrected metering signal, AD Real time For the real-time AD value in the meter signal AD channel, K is the correction slope.
Further, wherein the expression for calculating the correction slope is:
in the formula, ADref Calibrating For a nominal AD value in the reference signal AD channel, ADref Currently, the method is that For the current AD value, k in the reference signal AD channel Calibrating The data slope is weighed for calibration.
According to the precision correction method for the weighing and metering instrument, provided by the invention, the calibration AD value in the reference signal AD channel corresponding to the calibration signal during calibration is recorded, the slope of the calibration and weighing data is calculated according to the calibration AD value, the real-time AD value in the metering signal AD channel at a certain temperature is corrected based on the calibration AD value and the calibration and weighing data slope, and the problems that the precision influence of the temperature sensor is changed by adopting a temperature compensation method and the complex effect of a compensation algorithm is poor are solved.
Drawings
Fig. 1 is a flowchart of a method for correcting accuracy of a weighing and measuring instrument according to an embodiment of the present invention.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1, a method for correcting accuracy of a weighing and measuring instrument of the present application is shown, where the weighing and measuring instrument includes a measuring signal AD channel, and the method includes:
step 1, constructing a reference signal AD channel which is the same as the metering signal AD channel, and inputting a certain fixed signal into the reference signal AD channel as a calibration signal;
step 2, recording a calibration AD value in the AD channel of the reference signal corresponding to the calibration signal during calibration, and calculating a calibration weighing data slope according to the calibration AD value;
and 3, correcting the real-time AD value in the metering signal AD channel at a certain temperature based on the calibration AD value and the calibration weighing data slope.
In this embodiment, the calibration AD value in the reference signal AD channel corresponding to the calibration signal at the time of calibration is recorded, and the calibration weighing data slope is calculated according to the calibration AD value, and the real-time AD value in the metering signal AD channel at a certain temperature is corrected based on the calibration AD value and the calibration weighing data slope.
It should be noted that, the expression for correcting the real-time AD value in the metering signal AD channel at a certain temperature based on the calibration AD value and the calibration weighing data slope is:
wherein W is the AD value in the AD channel of the corrected metering signal, AD Real time For the real-time AD value in the meter signal AD channel, K is the correction slope.
Specifically, the expression for calculating the correction slope is:
in the formula, ADref Calibrating For a nominal AD value in the reference signal AD channel, ADref Currently, the method is that For the current AD value, k in the reference signal AD channel Calibrating The data slope is weighed for calibration.
Specifically, the slope of the calibration weighing data is the ratio of the calibration AD value to the calibration weight.
According to the method, the real-time AD value in the metering signal AD channel at a certain temperature is corrected by adopting the calibration AD value and the calibration weighing data slope, so that the problems of poor precision influence of the temperature sensor and poor compensation algorithm are solved by adopting the temperature compensation method.
Specifically, the reference signal AD channel is provided in the weighing scale.
In a specific embodiment, an instrument using an AD conversion chip is designed with two AD channels with identical line and component specifications. The reference signal AD channel and the metering signal AD channel both adopt the same AD conversion chip, peripheral resistance, capacitance and other accessories with the same specification and characteristics, and the same wiring and other same parameters are constructed into analog signal input, amplification and conversion circuits with the same working state. The two switching circuits have identical temperature-dependent characteristics.
The internal fixed input of the reference signal AD channel instrument is 75% of the full-scale signal of a sensor which the instrument can be connected with. The measuring instrument is mainly applied to the field of weighing, the connected signal is a resistance strain sensor, the principle is that the instrument outputs voltage to the sensor, a Wheatstone bridge is arranged in the sensor, and the Wheatstone bridge is unbalanced due to pressure change, so that a corresponding differential signal is obtained. The principle is that the resistor voltage division output is actually realized, and the complex circuit conversion is not involved. The reference signal can realize the equivalent circuit of sensing with low cost only by constructing the equivalent resistance circuit of the weighing sensor;
the metering instrument is calibrated by using 50% range load of the sensor at a certain temperature, the AD value of the AD channel of the acquired reference signal is 750000, and the AD value of the AD channel of the metering signal is 500000. If the load is 50.000kg, calculating a calibration slope as 10, and recording the slope and AD value of an AD reference channel;
when the metering instrument is used at another temperature, the AD value of the acquired reference signal AD channel is 765000, the ambient temperature is changed, and the temperature drift of the instrument AD are corrected;
and calculating a corrected metering slope according to the AD value of the AD channel of the reference signal, and obtaining a correct metering indication value by metering the AD value/the corrected slope.
What has been described above is merely some embodiments of the present invention. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention.
Claims (2)
1. The method for correcting the precision of the weighing and metering instrument comprises a metering signal AD channel, and is characterized by comprising the following steps:
constructing a reference signal AD channel which is the same as the metering signal AD channel, and inputting a certain fixed signal into the reference signal AD channel as a calibration signal;
recording a calibration AD value in the reference signal AD channel corresponding to the calibration signal during calibration, and calculating a calibration weighing data slope according to the calibration AD value;
correcting the real-time AD value in the metering signal AD channel at a certain temperature based on the calibration AD value and the calibration weighing data slope, wherein the expression for correcting the real-time AD value in the metering signal AD channel at a certain temperature based on the calibration AD value and the calibration weighing data slope is as follows:
，
in the method, in the process of the invention,for correcting AD values in the AD channel of the post-metering signal,/->For the real-time AD value in the meter signal AD channel, < >>To correct the slope;
wherein, the expression for calculating the correction slope is:
，
in the method, in the process of the invention,for a nominal AD value in the reference signal AD channel, and (2)>For the current AD value in the reference signal AD channel, and (2)>The data slope is weighed for calibration.
2. The accuracy correction method of a weighing scale according to claim 1, wherein said reference signal AD channel is provided in said weighing scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210596923.2A CN114910152B (en) | 2022-05-30 | 2022-05-30 | Precision correction method for weighing metering instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210596923.2A CN114910152B (en) | 2022-05-30 | 2022-05-30 | Precision correction method for weighing metering instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114910152A CN114910152A (en) | 2022-08-16 |
| CN114910152B true CN114910152B (en) | 2024-03-12 |
Family
ID=82768837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210596923.2A Active CN114910152B (en) | 2022-05-30 | 2022-05-30 | Precision correction method for weighing metering instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114910152B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9626381D0 (en) * | 1995-12-22 | 1997-02-05 | Hermann Finance Corp Ltd | Microprocessor controlled sensor signal conditioning circuit |
| US6313414B1 (en) * | 2000-01-31 | 2001-11-06 | Harvestmaster, Inc. | Slope and motion compensator for weighing on a dynamic platform |
| CN101943598A (en) * | 2010-07-08 | 2011-01-12 | 珠海市长陆工业自动控制系统有限公司 | Calibration-free interchange method for belt scale instruments |
| CN203132679U (en) * | 2012-11-30 | 2013-08-14 | 承德市五岳电子技术有限公司 | Weighing machine calibration-free weighing system |
| CN105794115A (en) * | 2013-10-31 | 2016-07-20 | 统雷有限公司 | Multiple channel matching method |
| CN106595819A (en) * | 2017-01-18 | 2017-04-26 | 郑州迪生仪器仪表有限公司 | Continuous baby weighing method of baby incubator |
| CN108225399A (en) * | 2017-12-13 | 2018-06-29 | 中国航天空气动力技术研究院 | A kind of general modification method of sensing system |
| CN109916496A (en) * | 2019-04-11 | 2019-06-21 | 深圳市深信信息技术有限公司 | A kind of monitoring method and system of electronic scale |
| CN112082634A (en) * | 2020-09-02 | 2020-12-15 | 谢凤兰 | Remote auxiliary calibration method for electronic scale |
| CN113393525A (en) * | 2021-08-18 | 2021-09-14 | 深圳市安普测控科技有限公司 | Weight calibration method based on accurate weighing |
| CN114499719A (en) * | 2020-11-12 | 2022-05-13 | 北京邮电大学 | Multi-radio-frequency channel mismatch calibration method and device based on channel simulator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6643919B2 (en) * | 2016-03-02 | 2020-02-12 | キヤノン株式会社 | Signal processing apparatus and method, and imaging apparatus |
-
2022
- 2022-05-30 CN CN202210596923.2A patent/CN114910152B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9626381D0 (en) * | 1995-12-22 | 1997-02-05 | Hermann Finance Corp Ltd | Microprocessor controlled sensor signal conditioning circuit |
| US6313414B1 (en) * | 2000-01-31 | 2001-11-06 | Harvestmaster, Inc. | Slope and motion compensator for weighing on a dynamic platform |
| CN101943598A (en) * | 2010-07-08 | 2011-01-12 | 珠海市长陆工业自动控制系统有限公司 | Calibration-free interchange method for belt scale instruments |
| CN203132679U (en) * | 2012-11-30 | 2013-08-14 | 承德市五岳电子技术有限公司 | Weighing machine calibration-free weighing system |
| CN105794115A (en) * | 2013-10-31 | 2016-07-20 | 统雷有限公司 | Multiple channel matching method |
| CN106595819A (en) * | 2017-01-18 | 2017-04-26 | 郑州迪生仪器仪表有限公司 | Continuous baby weighing method of baby incubator |
| CN108225399A (en) * | 2017-12-13 | 2018-06-29 | 中国航天空气动力技术研究院 | A kind of general modification method of sensing system |
| CN109916496A (en) * | 2019-04-11 | 2019-06-21 | 深圳市深信信息技术有限公司 | A kind of monitoring method and system of electronic scale |
| CN112082634A (en) * | 2020-09-02 | 2020-12-15 | 谢凤兰 | Remote auxiliary calibration method for electronic scale |
| CN114499719A (en) * | 2020-11-12 | 2022-05-13 | 北京邮电大学 | Multi-radio-frequency channel mismatch calibration method and device based on channel simulator |
| CN113393525A (en) * | 2021-08-18 | 2021-09-14 | 深圳市安普测控科技有限公司 | Weight calibration method based on accurate weighing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114910152A (en) | 2022-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2209395C2 (en) | Method of calibration of system of measurement of liquid flow pressure difference | |
| CN106404207B (en) | Wide-range high-precision temperature measuring instrument based on platinum resistor and measuring method thereof | |
| US8197133B2 (en) | System and method for sensor thermal drift offset compensation | |
| JP4736508B2 (en) | Physical quantity detection method and sensor device | |
| US8701460B2 (en) | Method and system to compensate for temperature and pressure in piezo resistive devices | |
| US20060250146A1 (en) | Method and device for the temperature compensation of a measuring bridge | |
| CN107271081B (en) | Silicon piezoresistive pressure transmitter temperature compensation method and device based on two-stage least square fitting | |
| US20090299657A1 (en) | Air flow measurement device and air flow correction method | |
| US5877423A (en) | Method for providing temperature compensation for a wheatstone bridge-type pressure sensor | |
| CN210123318U (en) | Strain measurement circuit based on strain gauge | |
| US7373266B2 (en) | Sensor calibration using selectively disconnected temperature | |
| CN103063321A (en) | Platinum resistance temperature measuring equipment and temperature measuring method thereof | |
| CN114910152B (en) | Precision correction method for weighing metering instrument | |
| US7146860B2 (en) | Method for temperature compensation of a digital pressure meter | |
| CN206488794U (en) | A kind of high precision electro bridge circuit of resistance strain type sensor | |
| CN106644193B (en) | Method and system for measuring pressure value | |
| JP5967803B2 (en) | Strain gauge transducer | |
| KR100904225B1 (en) | Apparatus for measuring water level | |
| JP3084579B2 (en) | Temperature sensor linearization processing method | |
| CN117824771B (en) | Automatic temperature compensation circuit and compensation method for thermal flowmeter | |
| CN114894223B (en) | Novel bridge sensor signal conditioning circuit and method | |
| RU2789106C1 (en) | Method for measuring liquid or gas pressure and device for its implementation | |
| CN115452179B (en) | Multi-channel real-time self-calibration thermocouple cold end temperature measurement method | |
| JP2013024808A (en) | Measuring apparatus and measuring method | |
| CN203069290U (en) | Platinum resistor temperature measuring equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |