WO2007125602A1 - 電子天びん - Google Patents
電子天びん Download PDFInfo
- Publication number
- WO2007125602A1 WO2007125602A1 PCT/JP2006/309037 JP2006309037W WO2007125602A1 WO 2007125602 A1 WO2007125602 A1 WO 2007125602A1 JP 2006309037 W JP2006309037 W JP 2006309037W WO 2007125602 A1 WO2007125602 A1 WO 2007125602A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensitivity calibration
- allowable
- sensitivity
- temperature change
- temperature
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/48—Temperature-compensating arrangements
Definitions
- the present invention relates to an electronic balance that measures the mass of an object, and more particularly to an electronic balance that performs sensitivity calibration using a built-in weight.
- an electronic balance detects a load generated when a weighing object is loaded by a load sensor incorporated in a load detection mechanism, and takes digital conversion data obtained by digitizing the detection signal every moment.
- the finite n data is averaged by moving average etc., and converted to mass value by arithmetic processing such as multiplication of sensitivity calibration coefficient or span coefficient, and this is displayed on the display as a measurement value, or It is configured to print out to a printer.
- a high-precision electronic balance has a ratio of the maximum weighing value to the minimum weighing unit value of 1Z1.6 million to 1Z2 million (0.5 PPM).
- electronic components and other components have a relatively large temperature dependency and aging in electrical and mechanical characteristics.
- the temperature dependency of the magnetic field strength of a permanent magnet is 200. It has characteristics such as ⁇ 400PPMZ ° C, aging is 10PPMZ month. For this reason, the temperature dependence of the force span is limited to about 1 to 2 PPMZ ° C, where various measures such as temperature correction on the hardware and software sides and strict adjustments during manufacturing are performed.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-214033
- conventional electronic balances generally have a sensitivity calibration function, and multiply the mass detection value by multiplying the load detection signal from the load sensor that detects the load caused by the load of the object to be weighed by the calibrated sensitivity coefficient. Since the converted measurement value is displayed on the display unit or printed out by a printer, reliable measurement can be performed by frequently performing sensitivity calibration. For example, in an electronic balance with a sensitivity temperature coefficient of 10 PPM and a maximum weighing value of 300. OOOg, the tolerance due to temperature change can be kept below the minimum weighing unit amount. Although it is necessary to perform sensitivity calibration every 33 ° C change, automatic sensitivity calibration is performed during weighing work and key operation even when the user can judge that not much tolerance is required especially for weighing accuracy. Since this is executed, the weighing operation and operation were interrupted, resulting in a decrease in weighing work efficiency.
- the present invention has been made in view of such circumstances, and provides an electronic balance with high weighing work efficiency that can reduce the frequency of performing sensitivity calibration according to the required weighing accuracy. With the goal.
- a load detection unit that detects a load of the object to be measured and outputs the detection signal
- a mass calculation unit that calculates the mass of the object to be measured by multiplying the detection signal by a sensitivity coefficient
- Automatic sensitivity calibration function that includes temperature detection means for detecting temperature and sensitivity calibration means with built-in weight, and detects the temperature change from the previous sensitivity calibration and performs sensitivity calibration whenever a certain amount of temperature change occurs.
- An electronic balance equipped with an allowable error input means for inputting an allowable error due to a temperature change with respect to the maximum weight value, an allowable temperature change amount calculating means for calculating an allowable temperature change amount corresponding to the allowable error, and this Generation of allowable temperature change Sensitivity calibration execution determination means for detecting and determining execution of sensitivity calibration is provided, and automatic sensitivity calibration is performed every time an allowable temperature change occurs.
- the electronic balance of the present invention has an approximate weighing value that can be predicted in advance of the object to be weighed, and an allowable error input means for inputting an allowable error due to the temperature with respect to the weighing value, and an allowable temperature change corresponding to the allowable error. It has an allowable temperature change calculation means to calculate, and a sensitivity calibration execution determination means that detects the occurrence of this allowable temperature change and determines the execution of sensitivity calibration, and automatically calibrates each time the allowable temperature change occurs. Is to execute.
- the electronic balance of the present invention inputs an allowable error smaller than the allowable error input in the automatic sensitivity calibration, and displays an alarm on the display unit when the temperature change amount corresponding to the allowable error is reached.
- FIG. 1 is a block diagram showing a configuration of an electronic balance according to the present invention.
- FIG. 2 is a flowchart showing a sensitivity calibration execution condition calculation procedure according to the embodiment.
- FIG. 3 is a flowchart showing a sensitivity calibration execution procedure according to the embodiment.
- a first feature of the electronic balance provided by the present invention is a tolerance error input means for inputting an allowable error for inputting an allowable error due to a temperature change with respect to a maximum weight value or an approximate weight value that can be predicted in advance.
- An allowable temperature change amount calculating means for calculating an allowable temperature change amount corresponding to the error and a sensitivity calibration determining means for detecting the occurrence of the allowable temperature change amount and determining execution of sensitivity calibration are provided.
- the second feature is that automatic sensitivity calibration is performed each time it occurs, and the second feature is that a V ⁇ tolerance that is smaller than the tolerance that is entered in automatic sensitivity calibration is entered, and the temperature change corresponding to this tolerance is entered. The point is that an alarm is displayed on the display unit when it reaches.
- the basic configuration of the best mode is an electronic balance that completely comprises these first and second configurations.
- FIG. 1 is a block diagram showing the configuration of the electronic balance according to the embodiment.
- the electronic balance is placed on the pan 11
- the load detection unit 1 that detects the load of the measured object 12 or the internal weight 13 and outputs the detection signal, and the temperature that detects the temperature in the load detection unit 1 and outputs the detection signal Sensor 5, display unit 3 that displays the tolerance of the object to be weighed 12 and the temperature described later, sensitivity calibration mechanism 6a that drives motor 6b and adds / subtracts internal weight 13 to load detector 1, and temperature Digit setting key 41, numeric setting key 42, unit setting key 43, allowable error input Z release key 44 and sensitivity calibration execution key 45 for setting the permissible error due to change, and operation switch 4, which is the switch force linked to each,
- the load detection signal from the load detection unit 1 is converted into mass data and displayed on the display unit 3, and the processing unit 2 is configured to perform sensitivity calibration execution determination processing.
- the processing unit 2 constitutes an electric circuit with a microcomputer having general-purpose AZD conversion, input / output interface, CPU, memory, etc. (not shown) and receives an allowable error input from the operation switch 4.
- a sensitivity calibration execution function 25 that transmits a control signal for transmission, a mass conversion function 26, and a display processing function 27 are constructed in a calculation control program. The amount, and a storage device 23 which stores the temperature error characteristic value and the previous sensitivity calibration when the temperature.
- FIG. 2 is a flowchart showing a sensitivity calibration execution condition calculation procedure by the processing unit 2.
- the procedure for calculating the sensitivity calibration execution condition will be described with reference to FIGS.
- Operation switch 4 digit setting key 41, numerical value setting key 42 and unit setting key 43 set the allowable error ⁇ S [g] due to temperature change and input the allowable error input Z release key 44 to input the allowable error input function 21
- the tolerance AS is read into the processing unit 2 (ST1)
- the rate of change of sensitivity coefficient k [PPMZ ° C] is read from the storage device 23 (ST2)
- the sensitivity calibration execution condition calculation function 22 Sensitivity change AC [gZ ° C] is calculated by equation (1) (ST3).
- This allowable temperature change amount ⁇ is updated and stored in the storage device 23 every time the allowable error ⁇ S is changed (ST5).
- FIG. 3 is a flowchart showing the weighing and automatic sensitivity calibration procedures of the present electronic balance.
- the load detection signal from load detection unit 1 is read into processing unit 2 and averaged (ST11), the detection signal from temperature sensor 5 is read into processing unit 2 (ST12), and the measured temperature is converted to the average load value. Is multiplied by a sensitivity coefficient corresponding to, and converted to a mass value (ST 13).
- ST14 Check if tolerance is input (ST14), and if it is input (YES), read temperature Tb at previous sensitivity calibration from storage device 23 (ST15) and calculate difference from current temperature T n Then, it is detected whether the difference is greater than the allowable temperature change amount ⁇ (ST16), and if it is greater than ⁇ , sensitivity calibration is executed (ST17).
- the mass value is displayed (ST18), and the next load data is sampled.
- the allowable error input ⁇ release key 44 is released (NO) in ST14, the mass value calculated in ST13 is displayed.
- the temperature change amount becomes ⁇ ⁇ ⁇ . If it exceeds (ST19), for example, an alarm of [ ⁇ . A ° C over] is displayed on the display unit 3 (ST20). By confirming this alarm, the user can predict that the next sensitivity calibration time will be near, and press the sensitivity calibration execution key 45 to perform sensitivity calibration, and then avoid measuring interruptions. Work efficiency.
- the maximum weighing value is 300.000g
- the temperature coefficient is 10P In PM balances
- the sensitivity change AC for each change of 1 ° C is 0.003gZ ° C from the above equation (1)
- the allowable temperature change ⁇ is From the above equation (2), 3.3 ° C.
- sensitivity calibration is performed each time the temperature changes by 3.3 ° C, so that it is possible to reduce sensitivity calibration more than necessary.
- the sensitivity change AC due to temperature change is 0.0003 gZ ° C, so even if the tolerance is 0.001 g, sensitivity calibration is performed every 3.3 ° C, so the number of sensitivity calibrations is greatly increased. Decrease.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/297,624 US7980114B2 (en) | 2006-04-28 | 2006-04-28 | Electronic balance |
PCT/JP2006/309037 WO2007125602A1 (ja) | 2006-04-28 | 2006-04-28 | 電子天びん |
JP2008513056A JP4835878B2 (ja) | 2006-04-28 | 2006-04-28 | 電子天びん |
CN2006800517191A CN101336365B (zh) | 2006-04-28 | 2006-04-28 | 电子秤 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2006/309037 WO2007125602A1 (ja) | 2006-04-28 | 2006-04-28 | 電子天びん |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007125602A1 true WO2007125602A1 (ja) | 2007-11-08 |
Family
ID=38655148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/309037 WO2007125602A1 (ja) | 2006-04-28 | 2006-04-28 | 電子天びん |
Country Status (4)
Country | Link |
---|---|
US (1) | US7980114B2 (ja) |
JP (1) | JP4835878B2 (ja) |
CN (1) | CN101336365B (ja) |
WO (1) | WO2007125602A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1736746B1 (de) * | 2005-06-21 | 2012-08-01 | Mettler-Toledo AG | Verfahren zur Optimierung des Verhaltens einer Kraftmessvorrichtung sowie eine Kraftmessvorrichtung zur Durchführung des Verfahrens. |
JP5666930B2 (ja) * | 2011-01-28 | 2015-02-12 | 株式会社エー・アンド・デイ | 計量装置 |
CN102538938B (zh) * | 2011-12-20 | 2014-04-30 | 福建新大陆电脑股份有限公司 | 电子秤温度校正方法及装置 |
CN109990885A (zh) * | 2018-01-02 | 2019-07-09 | 梅特勒-托利多(常州)精密仪器有限公司 | 在线参数调整称重方法及系统和存储介质 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0354420A (ja) * | 1989-07-24 | 1991-03-08 | Shimadzu Corp | 電子天びん |
JPH03226628A (ja) * | 1990-01-31 | 1991-10-07 | Shimadzu Corp | 電子天びん |
JPH07128117A (ja) * | 1993-10-29 | 1995-05-19 | Shimadzu Corp | 電子天びん |
JP2000039536A (ja) * | 1998-07-06 | 2000-02-08 | Harting Kg Aa | 光導波体ケ―ブルのための接続エレメント及び接続エレメントに光導波体ケ―ブルを接続する方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0718738B2 (ja) * | 1988-02-29 | 1995-03-06 | 株式会社島津製作所 | 電子天びん |
JP2002214033A (ja) | 2001-01-23 | 2002-07-31 | Shimadzu Corp | 電子天びん |
-
2006
- 2006-04-28 CN CN2006800517191A patent/CN101336365B/zh not_active Expired - Fee Related
- 2006-04-28 JP JP2008513056A patent/JP4835878B2/ja not_active Expired - Fee Related
- 2006-04-28 WO PCT/JP2006/309037 patent/WO2007125602A1/ja active Application Filing
- 2006-04-28 US US12/297,624 patent/US7980114B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0354420A (ja) * | 1989-07-24 | 1991-03-08 | Shimadzu Corp | 電子天びん |
JPH03226628A (ja) * | 1990-01-31 | 1991-10-07 | Shimadzu Corp | 電子天びん |
JPH07128117A (ja) * | 1993-10-29 | 1995-05-19 | Shimadzu Corp | 電子天びん |
JP2000039536A (ja) * | 1998-07-06 | 2000-02-08 | Harting Kg Aa | 光導波体ケ―ブルのための接続エレメント及び接続エレメントに光導波体ケ―ブルを接続する方法 |
Also Published As
Publication number | Publication date |
---|---|
US7980114B2 (en) | 2011-07-19 |
CN101336365A (zh) | 2008-12-31 |
JPWO2007125602A1 (ja) | 2009-09-10 |
CN101336365B (zh) | 2010-11-17 |
JP4835878B2 (ja) | 2011-12-14 |
US20090100899A1 (en) | 2009-04-23 |
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