CN101968376B - Method for preventing cheat to weighing sensor - Google Patents
Method for preventing cheat to weighing sensor Download PDFInfo
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- CN101968376B CN101968376B CN201010283457XA CN201010283457A CN101968376B CN 101968376 B CN101968376 B CN 101968376B CN 201010283457X A CN201010283457X A CN 201010283457XA CN 201010283457 A CN201010283457 A CN 201010283457A CN 101968376 B CN101968376 B CN 101968376B
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Abstract
The invention relates to a method for preventing cheat to a weighing sensor; the weighing sensor comprises an elastomer arranged in the weighing sensor, a strain gauge bridge attached on the elastomer, and a chip sealed in the elastomer, wherein the chip and the weighing sensor are packaged into a whole in a non-removable manner, and carry out encryption on the identification (ID) and a weighing signal of every time of the sensor. The method has the advantage of being capable of preventing the occurrence of using the weighing sensor to cheat.
Description
[technical field]
The present invention relates to a kind of method of anti-cheating, relate in particular to the method for the anti-cheating of a kind of LOAD CELLS.
[background technology]
Existing LOAD CELLS generally contains an elastic body and a strainometer electric bridge of being located in the LOAD CELLS, and its principle of work is that resistance strain gage is sticked on the elastic sensing element (elastic body), forms bridge diagram (strainometer electric bridge) then in a suitable manner.Elastic body can convert tested weight to elastomeric strain value; And by the variation that elastomeric strain is synchronously converted into resistance value as the resistance strain gage of sensing element; And finally export from the strainometer electric bridge, thereby realize that non-electric physical quantity converts electric weight output to the form of electric signal.Illegal retailer only needs the I/O connection last of this strainometer electric bridge can be influenced the electronic circuit of sensor output value, just can reach the purpose of cheating, causes the confusion in relevant industries market so possibly.
[summary of the invention]
Technical matters to be solved by this invention is to provide the method for the anti-cheating of a kind of LOAD CELLS, realizes avoiding LOAD CELLS is carried out the generation of cheating.
The present invention solves the problems of the technologies described above through following technical scheme: the method for the anti-cheating of a kind of LOAD CELLS; Said LOAD CELLS comprises that the elastic body of being located in the LOAD CELLS and is attached to the strainometer electric bridge on this elastic body, and it is characterized in that: said method comprises the steps:
The said chip of step 4. LOAD CELLS reads master key, and through this master key first working key and the first data check key that receive is deciphered, and produces and preserve second working key and the second data check key;
Step 5. strainometer electric bridge is exported corresponding voltage signal because of resistance change when LOAD CELLS is weighed; This voltage signal carries out A/D through chip and converts digital signal into; This digital signal is encrypted through second working key; And in this encrypted process, produce a check code, this check code is encrypted the back through the second data check key and is produced an encrypted characters string, and the digital signal after will encrypting is sent to the subordinate unit with this encrypted characters string.
Further; Said chip comprises a storage unit and the IO interface that single-chip microcomputer, that a power supply processing unit, an A/D converter, be used for data processing and cryptographic calculation is used to store identity ID and key; Said power supply processing unit is connected with the negative voltage input end with the positive voltage input end of strainometer electric bridge; Said A/D converter is connected with the negative signal output terminal with the positive signal output terminal of strainometer electric bridge; And said A/D converter and storage unit are connected in single-chip microcomputer respectively, and said power supply processing unit and single-chip microcomputer are connected to IO interface;
Said step 2 is specially: open LOAD CELLS; At first the single-chip microcomputer by chip sends the instruction of reading the first identity ID to storage unit; And it is carried out encryption form the second identity ID, and this second identity ID is sent to the next stage unit via IO interface;
Said step 3 is specially: the next stage unit feeds back to one first working key and one first data check key at random to the said single-chip microcomputer of LOAD CELLS;
Said step 4 is specially: the said chip of LOAD CELLS reads master key from storage unit; And through this master key first working key and the first data check key that receive are deciphered, produce and preserve second working key and the second data check key;
Voltage signal in the said step 5 converts digital signal into through A/D converter.
The beneficial effect of the method for the anti-cheating of a kind of LOAD CELLS of the present invention is: can realize the effectively anti-cheating of LOAD CELLS, and then avoid LOAD CELLS is carried out the generation of cheating.
[description of drawings]
Combine embodiment that the present invention is done further description with reference to the accompanying drawings.
Fig. 1 is the workflow diagram of the method for the anti-cheating of a kind of LOAD CELLS of the present invention.
Fig. 2 is the cross-sectional schematic of LOAD CELLS among the present invention.
The circuit diagram of Fig. 3 chips of the present invention
[embodiment]
See also Fig. 2; LOAD CELLS 100 among the present invention comprises that the elastic bodys of being located in the LOAD CELLS 100 1, are attached to that strainometer electric bridge 2 and on this elastic body 1 is sealed in elastic body 1 inner usefulness in case the chip 3 of cheating, and this chip 3 is packaged as a whole with on-dismountable mode with this LOAD CELLS 100.
See also Fig. 3; Chip 3 comprises single-chip microcomputer 33, a storage unit 34 and the IO interface 35 that a power supply processing unit 31, an A/D converter 32, are used for data processing and cryptographic calculation; Said power supply processing unit 31 is connected with negative voltage input end 22 with the positive voltage input end 21 of strainometer electric bridge 2 respectively; Said A/D converter 32 is connected with negative signal output terminal 24 with the positive signal output terminal 23 of strainometer electric bridge 2; And said A/D converter 32 is connected to single-chip microcomputer 33 with storage unit 34, and said power supply processing unit 31 is connected to IO interface 35 with single-chip microcomputer 33; Store the first identity ID and the initialized master key of this LOAD CELLS 100 in the said storage unit 34.
See also Fig. 1, LOAD CELLS anti-cheating method of the present invention comprises the steps:
The said single-chip microcomputer of step 4. LOAD CELLS reads master key from storage unit, and through this master key first working key and the first data check key that receive is deciphered, and produces and preserve second working key and the second data check key;
Step 5. strainometer electric bridge is exported corresponding voltage signal because of resistance change when LOAD CELLS is weighed; This voltage signal converts digital signal into through A/D converter; This digital signal is encrypted through second working key; And in this encrypted process, produce a check code, this check code is encrypted the back through the second data check key and is produced an encrypted characters string, and the digital signal after will encrypting is sent to the subordinate unit with this encrypted characters string.
The present invention is packaged as a whole chip and this LOAD CELLS with on-dismountable mode design; In case opening this LOAD CELLS does any change to the structure of chip and all will damage LOAD CELLS; In addition, this anti-cheating method is encrypted through the identity ID to sensor, and each weighing signal is encrypted; Preventing artificial distorting, thereby reach the purpose of anti-cheating.
Claims (2)
1. the method for the anti-cheating of a LOAD CELLS, said LOAD CELLS comprises that the elastic body of being located in the LOAD CELLS and is attached to the strainometer electric bridge on this elastic body, it is characterized in that: said method comprises the steps:
Step 1. is elastic body inner sealing one chip, and makes this chip on-dismountable, stores the first identity ID and the initialized master key of this LOAD CELLS in the said chip;
Step 2. is opened LOAD CELLS, is at first read the first identity ID and is carried out encryption through master key by chip to form the second identity ID, and this second identity ID is sent to the next stage unit;
Step 3. next stage unit feeds back to one first working key and one first data check key at random to LOAD CELLS;
The said chip of step 4. LOAD CELLS reads master key, and through this master key first working key and the first data check key that receive is deciphered, and produces and preserve second working key and the second data check key;
Step 5. strainometer electric bridge is exported corresponding voltage signal because of resistance change when LOAD CELLS is weighed; This voltage signal carries out A/D through chip and converts digital signal into; This digital signal is encrypted through second working key; And in this encrypted process, produce a check code, this check code is encrypted the back through the second data check key and is produced an encrypted characters string, and the digital signal after will encrypting is sent to the subordinate unit with this encrypted characters string.
2. the method for the anti-cheating of a kind of according to claim 1 LOAD CELLS; It is characterized in that: said chip comprises a storage unit and the IO interface that single-chip microcomputer, that a power supply processing unit, an A/D converter, be used for data processing and cryptographic calculation is used to store identity ID and key; Said power supply processing unit is connected with the negative voltage input end with the positive voltage input end of strainometer electric bridge; Said A/D converter is connected with the negative signal output terminal with the positive signal output terminal of strainometer electric bridge; And said A/D converter and storage unit are connected in single-chip microcomputer respectively, and said power supply processing unit and single-chip microcomputer are connected to IO interface;
Said step 2 is specially: open LOAD CELLS; At first the single-chip microcomputer by chip sends the instruction of reading the first identity ID to storage unit; And it is carried out encryption form the second identity ID, and this second identity ID is sent to the next stage unit via IO interface;
Said step 3 is specially: the next stage unit feeds back to one first working key and one first data check key at random to the said single-chip microcomputer of LOAD CELLS;
Said step 4 is specially: the said chip of LOAD CELLS reads master key from storage unit; And through this master key first working key and the first data check key that receive are deciphered, produce and preserve second working key and the second data check key;
Voltage signal in the said step 5 converts digital signal into through A/D converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010283457XA CN101968376B (en) | 2010-09-15 | 2010-09-15 | Method for preventing cheat to weighing sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010283457XA CN101968376B (en) | 2010-09-15 | 2010-09-15 | Method for preventing cheat to weighing sensor |
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| Publication Number | Publication Date |
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| CN101968376A CN101968376A (en) | 2011-02-09 |
| CN101968376B true CN101968376B (en) | 2012-07-04 |
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| CN201010283457XA Active CN101968376B (en) | 2010-09-15 | 2010-09-15 | Method for preventing cheat to weighing sensor |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180881A (en) * | 2014-08-22 | 2014-12-03 | 济南金钟电子衡器股份有限公司 | Anti-cheating high-precision intelligent digital weighing module and anti-cheating method thereof |
| CN104535163A (en) * | 2014-12-31 | 2015-04-22 | 福州科迪电子技术有限公司 | Method for preventing display value of electronic balance from being tampered with |
| CN107228707A (en) * | 2017-06-14 | 2017-10-03 | 中山典兆智能科技有限公司 | A kind of anti-cheated electronic weighing scale and anti-cheating system |
| CN109579963A (en) * | 2019-01-18 | 2019-04-05 | 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） | Autonomous type weighing anti-cheating method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6237098B1 (en) * | 1998-04-22 | 2001-05-22 | Interface Logic Systems, Inc. | System for protecting weight verification device private key |
| CN1996833A (en) * | 2006-12-04 | 2007-07-11 | 中国科学院计算技术研究所 | Allocation and management method of the secrete key in the sensor network |
| CN100555350C (en) * | 2007-09-14 | 2009-10-28 | 梅特勒-托利多(常州)称重设备系统有限公司 | Weighing system communication method based on digital sensor |
| CN101266695A (en) * | 2008-02-04 | 2008-09-17 | 南京理工大学 | Data recorder for pitch concrete mixing device |
| CN101476929B (en) * | 2009-01-15 | 2010-07-21 | 山东浪潮齐鲁软件产业股份有限公司 | Materiel-casting electronic weighing data acquisition and processing method for medicine production enterprise |
| CN101777227A (en) * | 2009-08-25 | 2010-07-14 | 北京拓盛电子科技有限公司 | Electronic scale tax-controlling weighing display controller and electronic scale tax controller |
| CN101777232B (en) * | 2009-09-23 | 2011-10-26 | 北京拓盛电子科技有限公司 | Electronic scale tax monitoring system and method |
| CN101968377B (en) * | 2010-09-15 | 2012-05-02 | 福州科迪电子技术有限公司 | Anti-cheating method of electronic scale |
| CN201765037U (en) * | 2010-09-15 | 2011-03-16 | 福州科迪电子技术有限公司 | Weighing sensor having anti-cheating function |
| CN201788005U (en) * | 2010-09-15 | 2011-04-06 | 福州科迪电子技术有限公司 | Cheating prevention electronic scale |
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