CN110132393B - Electronic scale with display position capable of being automatically and dynamically adjusted - Google Patents
Electronic scale with display position capable of being automatically and dynamically adjusted Download PDFInfo
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- CN110132393B CN110132393B CN201910431554.XA CN201910431554A CN110132393B CN 110132393 B CN110132393 B CN 110132393B CN 201910431554 A CN201910431554 A CN 201910431554A CN 110132393 B CN110132393 B CN 110132393B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
- G01G19/413—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means
- G01G19/414—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only
- G01G19/4144—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only for controlling weight of goods in commercial establishments, e.g. supermarket, P.O.S. systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
- G01G23/017—Securing calibration against fraud
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/18—Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
- G01G23/36—Indicating the weight by electrical means, e.g. using photoelectric cells
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Abstract
The invention provides an electronic scale with automatically and dynamically adjustable display positions, which comprises a controller, a digital display and a weighing sensor, wherein the digital display and the weighing sensor are respectively connected with the controller, the digital display comprises M seven-segment digital tubes, a light emitting diode for displaying decimal points is arranged between every two adjacent seven-segment digital tubes, the controller determines the digit N on the left side of the decimal point in weight data after receiving the weight data detected by the weighing sensor, displays corresponding digits on each digit on the left side of the decimal point from the left to the right, controls to light the light emitting diode on the right side of the Nth seven-segment digital tube in the digital display, takes M-N digits from each digit on the right side of the decimal point in the weight data according to the sequence from the left to the right, and takes corresponding digits on each digit on the right side of the acquired decimal point according to the sequence from the left to the right, the display starts from a seven-segment digital tube on the right side of the lighted LED, and M and N are integers larger than zero.
Description
Technical Field
The invention belongs to the field of electronic scales, and particularly relates to an electronic scale with a display position capable of being automatically and dynamically adjusted.
Background
At present, electronic scales are very common weighing tools in daily life, and generally comprise a controller, a digital display and a weighing sensor, wherein the controller displays weight data detected by the weighing sensor on the digital display. The digital display in the conventional electronic balance is generally composed of a plurality of seven-segment digital tubes and a light emitting diode for displaying decimal point, the display digit is fixed, the seven-segment digital tube at the left side of the light emitting diode in the digital display is used for displaying the integer part of the weight data, and the seven-segment digital tube at the right side of the light emitting diode is used for displaying the decimal part of the weight data. However, in actual weighing, the object to be weighed is light, and for the object to be weighed which is expensive (for example, precious medicinal materials measured in grams), the display digit of the decimal part in the weight data is generally required to be more, for example, the display digit of the decimal part of an electronic scale used for weighing heavy goods is generally 2 digits, while the display digit of the decimal part of the electronic scale used for the medicinal material shop may need to reach 3 digits or more. Obviously, the display range of the current electronic scale is narrow.
Disclosure of Invention
The invention provides an electronic scale with a display position capable of being automatically and dynamically adjusted, which aims to solve the problem of narrow display range of the electronic scale.
According to a first aspect of the embodiments of the present invention, there is provided an electronic scale with automatically dynamically adjustable display positions, comprising a controller, and a digital display and a weighing sensor respectively connected to the controller, wherein the digital display comprises M seven-segment digital tubes, a light emitting diode for displaying a decimal point is disposed between every two adjacent seven-segment digital tubes, the controller determines a digit N on the left side of the decimal point in the weight data after receiving the weight data detected by the weighing sensor, displays corresponding digits on each digit on the left side of the decimal point in a left-to-right sequence from the leftmost side of the digital display, controls to light the light emitting diode on the right side of the nth seven-segment digital tube in the digital display, and takes M-N digits from each digit on the right side of the decimal point in the weight data in a left-to-right sequence, and displaying corresponding digits on each digit on the right side of the acquired decimal point from the seven-segment nixie tube on the right side of the lighted LED in a left-to-right sequence, wherein M and N are integers larger than zero.
In an alternative implementation, the light emitting diode is positioned between the lower ends of two adjacent seven-segment nixie tubes.
In another alternative implementation mode, the highest digit of the displayable range of the integer part in the weight data is M-1 digit, and the highest digit of the displayable range of the decimal part is M-1 digit.
The invention has the beneficial effects that:
the invention can improve the display range of the electronic scale by arranging the light emitting diode for displaying decimal point between every two adjacent seven-segment digital tubes in the digital display and dynamically adjusting the number of digits occupied by the integer part and the decimal part in the digital display according to the weight data detected by the weighing sensor.
Drawings
FIG. 1 is a block diagram of one embodiment of an electronic scale with automatic dynamic adjustment of apparent position indication;
FIG. 2 is a schematic structural diagram of a digital display according to an embodiment of the present invention;
fig. 3 is a block diagram of another embodiment of an electronic scale with automatic dynamic adjustment of the position of the display according to the present invention.
Detailed Description
In order to make the technical solutions in the embodiments of the present invention better understood and make the above objects, features and advantages of the embodiments of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the term "connected" is to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, or a communication between two elements, or may be a direct connection or an indirect connection through an intermediate medium, and a specific meaning of the term may be understood by those skilled in the art according to specific situations.
Referring to fig. 1, a block diagram of an embodiment of an electronic scale with automatic dynamic position adjustment is shown. The electronic scale may include a controller 110, and a digital display 120 and a weighing sensor 130 respectively connected to the controller 110, as shown in fig. 2, the digital display 120 includes M seven-segment nixie tubes 121, a light emitting diode 122 for displaying a decimal point is disposed between every two adjacent seven-segment nixie tubes 121, the controller 110 determines a digit N on a left side of the decimal point in the weight data after receiving the weight data detected by the weighing sensor 130, displays corresponding digits on the left side of the decimal point from a left to a right order from a leftmost side of the digital display 120, controls to light the light emitting diode 122 on a right side of the nth seven-segment nixie tube 121 in the digital display 120, and takes M-N digits from the digits on the right side of the decimal point in the weight data in a left to right order, and takes corresponding digits on the right side of the decimal point in a left to right order from the left, the display starts with seven-segment digital tube 121 on the right side of the lit led 122, M and N each being an integer greater than zero. The light emitting diode 122 is positioned between the lower ends of two adjacent seven-segment digital tubes 121.
In this embodiment, referring to fig. 2, the digital display 120 is composed of four seven-segment nixie tubes 121 and three light emitting diodes 122, when the weight data is 201.254, the controller determines that the number of digits on the left side of the decimal point is three, at this time, the number 201 on the left side of the decimal point is sequentially displayed on the first three seven-segment nixie tubes in the digital display, and controls to light the light emitting diode (i.e., the third light emitting diode) on the right side of the third seven-segment nixie tube. When the weight data is 20.125, the controller determines that the number of digits on the left side of the decimal point is two, at this time, the number 20 on the left side of the decimal point is sequentially displayed on the first two seven-segment nixie tubes in the digital display, and controls to light the light emitting diode on the right side of the second seven-segment nixie tube (namely, the second light emitting diode). When the weight data is 2.012, the controller determines that the number of digits on the left side of the decimal point is one, at this time, the number 2 on the left side of the decimal point is displayed on a first seven-segment nixie tube in the digital display, and controls to light a light emitting diode (namely, a first light emitting diode) on the right side of the first seven-segment nixie tube.
Because the number of seven-segment nixie tubes in the digital display is limited, the weighing unit of the electronic scale is usually kg, when the decimal part is not displayed and only the integer part is displayed, the user requirement cannot be met generally, so that the electronic scale displays at least the first digit of the decimal part when displaying the weight data, and when the digital display in the electronic scale comprises M seven-segment nixie tubes, the highest digit of the displayable range of the integer part in the weight data is M-1 digit. In addition, the integer part of the weight data at least comprises one digit, so when a digital display in the electronic scale comprises M seven-segment digital tubes, the highest digit of the displayable range of the decimal part is M-1 digit. It can be seen from the above embodiments that the display range of the electronic scale can be increased by dynamically adjusting the number of bits occupied by the integer part and the decimal part in the digital display according to the weight data detected by the weighing sensor by arranging the light emitting diode for displaying the decimal point between every two adjacent seven-segment digital tubes in the digital display.
In addition, the electronic scale is easy to be taken out and refitted after being sold. After the traditional electronic scale is modified, the actual weight of the scale needs to be adjusted manually by pressing corresponding keys on the electronic scale or pressing corresponding keys on a remote controller according to the selling price of commodities. The traditional modified electronic scale is selected based on manual weight display, but along with the rise of unmanned marketing, the electronic scale can be operated by a consumer, does not involve sales personnel, and can only be further modified to cheat, so that the ratio of the displayed weight to the actual weight of the electronic scale is unique. However, since the unique ratio of the displayed weight to the actual weight of the retrofit scale is greater when the sale price of the item is higher, it is likely to be found by the consumer, and the fraud gain is less when the unique ratio of the displayed weight to the actual weight of the retrofit scale is lower when the sale price of the item is lower. In order to weigh commodities with different prices, the ratio of the display weight to the actual weight needs to be set according to the price of the commodity, and the weight of the commodity purchased by a consumer is generally smaller when the price of the commodity is higher, so that the ratio of the display weight to the actual weight is generally set according to the weight of the commodity when cheating is performed intuitively, and the ratio of the display weight to the actual weight is larger when the commodity is heavier (the price of the commodity is lower). It follows that conventional electronic scales may be retrofitted to weigh cheating anyway. Therefore, two weighing sensors are added in the invention, and the display mechanisms of the two weighing sensors are designed.
Referring to fig. 3, a block diagram of another embodiment of an electronic scale with automatic dynamic adjustment of position is shown. The difference between the electronic scale with the display position automatically and dynamically adjustable shown in fig. 3 and that shown in fig. 1 is that the load cell 130 includes a first load cell and a second load cell, which are respectively connected to the controller 110. The measurement precision of the first weighing sensor is lower than that of the second weighing sensor, and the measurement range of the first weighing sensor comprises the measurement range of the second weighing sensor. In daily weighing, a second weighing sensor with higher measurement precision is adopted to weigh the commodity placed on the weighing platform, and weight information detected by the second weighing sensor is displayed on a digital display. Because the difficulty of the consumer to automatically check the cheating force is possibly increased if a more complicated cheating checking method is adopted, the cheating force of the electronic scale is determined by comparing the weight information detected by the two weighing sensors for the same commodity by adopting two weighing sensors with completely different measuring precisions, so that the cheating force is easily found when the ratio of the displayed weight to the actual weight is adjusted according to the weight of the commodity. For example, when the actual weight detected by the second load cell is 8.78kg and the actual weight detected by the first load cell with lower measurement accuracy is 8.7kg, if the ratio is 1.2, the weight detected by the second load cell is 8.78 × 1.2 — 10.536 (two digits after the decimal point are reserved, namely 10.53), the weight detected by the first load cell is 8.7 × 1.2 — 10.44 (one digit after the decimal point is reserved, namely 10.4), and the two displayed data 10.53 are different from 10.4. Similarly, if the ratio is 1.01, it shows that the weight detected by the second weighing sensor is 8.78 × 1.01 ═ 8.8678 (two digits after the decimal point are reserved, i.e. 8.86) after cheating, it shows that the weight detected by the first weighing sensor is 8.7 × 1.01 ═ 8.787 (one digit after the decimal point is reserved, i.e. 8.8), and the two displayed data are 8.86 and 8.8 similar, so it can be seen that the displayed weights of the two weighing sensors in the modified electronic scale are close only when the ratio is small, and an illegal person can only design the ratio to be small when modifying, thereby reducing cheating force to a certain extent.
Although the two weighing sensors can be adopted to force an illegal person to adjust the ratio of the displayed weight to the actual weight to the minimum in the refitting process, and the cheating force is reduced to a certain extent, if the two weighing sensors are adopted for weighing in the normal weighing process and the symmetrical weight information is displayed, the two weight information is displayed because the measuring precision of the first weighing sensor is smaller than that of the second weighing sensor, on one hand, a consumer does not know which weight should be used as the standard, and on the other hand, certain errors may exist in the two weights, so that the consumer is confused. In order to ensure the normal use of the electronic scale, the invention designs a normal display mechanism and a cheating inspection display mechanism of the electronic scale. Because the electronic scale is in the use, after the same commodity is placed on the weighing platform twice by a consumer, the probability of occurrence that another commodity with different weight is continuously placed on the weighing platform twice is very small, so that the situation can be used as a trigger condition for displaying the weight information detected by the first weighing sensor, the trigger condition is simple, and the difficulty of self-checking cheating force by the consumer is reduced.
Specifically, during weighing, the controller adopts the second weighing sensor to weigh a first commodity placed on the weighing platform, inserts the weight information of the first commodity into a queue from the tail of the queue, and displays the weight information of the first commodity on the digital display; the controller adopts the second weighing sensor to weigh the second commodities which are sequentially placed on the weighing platform, and weight information of the second commodities is displayed on the digital display. Because the weight information detected by the first weighing display is triggered to be displayed, the user can quickly lift the first commodity after the first commodity is weighed and place the first commodity on the weighing platform again, the interval time is short, if the interval time is too long, the user is not ready for cheating force verification, the controller can judge whether the interval time from weighing the first commodity to weighing the second commodity is longer than the corresponding preset time after the weight information of the second commodity is displayed on the digital display, if so, the user is not ready for cheating force verification, the controller inserts the weight information of the second commodity into the queue from the tail of the queue after the characters in the queue are emptied, otherwise, the weight of the second commodity is judged whether to be equal to the weight of the first commodity, and if so, indicating that the user is in preparation for cheating strength verification, inserting the weight information of the second commodity into the queue from the tail of the queue, and if the weight information of the second commodity is not in preparation for cheating strength verification, indicating that the user is not in preparation for cheating strength verification, and inserting the weight information of the second commodity into the queue from the tail of the queue after characters in the queue are emptied.
The controller adopts the second weighing sensor to weigh a third commodity placed on the weighing platform in sequence, weight information of the third commodity is displayed on the digital display, whether the interval time from weighing the second commodity to weighing the third commodity is longer than a corresponding preset time is judged, if yes, the user is not in cheating force verification preparation, after characters in the queue are emptied, the weight information of the third commodity is inserted into the queue from the tail of the queue, otherwise, whether the weight of the third commodity is equal to that of the second commodity is judged, if not, the user is in cheating force verification preparation, the weight information of the third commodity is inserted into the queue from the tail of the queue, if yes, the user is not in cheating force verification preparation, and after the characters in the queue are emptied, and inserting the weight information of the third commodity into the queue from the tail of the queue.
The controller adopts the second weighing sensor to weigh a fourth commodity placed on the weighing platform in sequence, weight information of the fourth commodity is displayed on the digital display, whether the interval time from weighing the third commodity to weighing the fourth commodity is longer than a corresponding preset time is judged, if yes, the user is not in cheating force verification preparation, after characters in the queue are emptied, the weight information of the fourth commodity is inserted into the queue from the tail of the queue, otherwise, whether the weight of the fourth commodity is equal to the weight of the third commodity is judged, if yes, the user is in cheating force verification preparation and is ready to finish, the weight information of the fourth commodity is inserted into the queue from the tail of the queue, and if not, the user is not in cheating force verification preparation, and after the characters in the queue are emptied, inserting the weight information of the fourth commodity into the queue from the tail of the queue.
The controller judges the number of the characters in the queue in real time, controls the first weighing sensor to weigh the commodity corresponding to the fourth weight information in the queue when the number of the characters in the queue is equal to 4, and displays the weight information of the commodity detected by the first weighing sensor on the digital display; and determining whether the electronic scale has larger cheating force according to the weight information detected by the second weighing sensor and the weight information detected by the first weighing sensor which are sequentially displayed on the digital display.
When the invention triggers and displays the weight detected by the first weighing sensor, the invention does not store the four weight information detected in the triggering process and the detection interval time between every two weight information, compares each weight information with the interval time after receiving the fourth weight information, but introduces a queue, judges whether the user is doing cheating force detection preparation or not after receiving the weight information each time, displays the weight information detected by the first weighing sensor only when the four commodities are measured and are sequentially doing cheating force detection preparation, and triggers and displays the weight information detected by the first weighing sensor only by inserting the weight information of the fourth commodity into the queue after the controller receives the weight information of the fourth commodity and determines that the user weighs the fourth commodity and also does cheating force detection preparation, therefore, the weight information detected by the first weighing sensor can be rapidly displayed in the cheating force detection, and the good experience degree in the cheating verification of the user can be improved.
According to the embodiment, the two weighing sensors are arranged, so that illegal persons can be forced to adjust the ratio of the displayed weight to the actual weight to the minimum when the illegal persons are refitted, and cheating force is reduced to a certain extent; by designing a normal display mechanism and a cheating verification display mechanism, only the weight information detected by the second weighing sensor with higher measurement precision can be displayed during normal weighing, and the weight information detected by the second weighing sensor and the weight information detected by the first weighing sensor can be sequentially displayed during cheating verification, so that the cheating strength verification can be performed by using a simpler method while the user can be ensured to normally use good experience; by introducing the queue, after the controller receives the weight information every time, whether the user is doing cheating force check preparation or not is judged, the weight information detected by the first weighing sensor is displayed only when the four commodities are measured sequentially and the user is doing cheating force check preparation, the weight information detected by the first weighing sensor is displayed when the controller receives the weight information of the fourth commodity, and the weight information detected by the first weighing sensor can be triggered to be displayed only by inserting the weight information of the fourth commodity into the queue after the fourth commodity is determined to be weighed by the user and is also doing cheating force check preparation, so that the weight information detected by the first weighing sensor can be rapidly displayed in the cheating force check, and good experience degree in the cheating check of the user can be improved.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (3)
1. An electronic scale with automatically and dynamically adjustable display positions is characterized by comprising a controller, a digital display and a weighing sensor, wherein the digital display and the weighing sensor are respectively connected with the controller, the digital display comprises M seven-segment digital tubes, a light emitting diode for displaying decimal points is arranged between every two adjacent seven-segment digital tubes, after the controller receives weight data detected by the weighing sensor, the digit N on the left side of the decimal point in the weight data is determined, corresponding digits on each digit on the left side of the decimal point are displayed from the leftmost side of the digital display in a left-to-right sequence, the light emitting diode on the right side of the Nth seven-segment digital tube in the digital display is controlled to be lightened, M-N digits are taken from each digit on the right side of the decimal point in the weight data in a left-to-right sequence, and corresponding digits on each digit on the right side of the decimal point are taken in a left-to-right sequence, starting to display from a seven-segment digital tube on the right side of the lighted LED, wherein M and N are integers larger than zero;
the weighing sensors comprise a first weighing sensor and a second weighing sensor, and the first weighing sensor and the second weighing sensor are respectively connected with the controller; the measurement precision of the first weighing sensor is lower than that of the second weighing sensor, and the measurement range of the first weighing sensor comprises the measurement range of the second weighing sensor;
during weighing, the controller adopts the second weighing sensor to weigh a first commodity placed on the weighing platform, inserts the weight information of the first commodity into a queue from the tail of the queue, and displays the weight information of the first commodity on the digital display;
the controller adopts the second weighing sensor to weigh the second commodities placed on the weighing platform in sequence, weight information of the second commodities is displayed on the digital display, after the weight information of the second commodities is displayed on the digital display, whether the interval time from weighing the first commodities to weighing the second commodities is longer than a corresponding preset time is judged, if yes, the controller indicates that a user is not in cheating force check preparation, at the moment, the controller inserts the weight information of the second commodities into the queue from the tail of the queue after characters in the queue are emptied, otherwise, whether the weight of the second commodities is equal to that of the first commodities is judged, if yes, the controller indicates that the user is in cheating force check preparation, the weight information of the second commodities is inserted into the queue from the tail of the queue, if not, indicating that the user is not in cheating strength verification preparation, and inserting the weight information of the second commodity into the queue from the tail of the queue after emptying the characters in the queue;
the controller adopts the second weighing sensor to weigh a third commodity placed on the weighing platform in sequence, weight information of the third commodity is displayed on the digital display, whether the interval time from weighing the second commodity to weighing the third commodity is longer than a corresponding preset time is judged, if yes, the user is not in cheating force verification preparation, after characters in the queue are emptied, the weight information of the third commodity is inserted into the queue from the tail of the queue, otherwise, whether the weight of the third commodity is equal to that of the second commodity is judged, if not, the user is in cheating force verification preparation, the weight information of the third commodity is inserted into the queue from the tail of the queue, if yes, the user is not in cheating force verification preparation, and after the characters in the queue are emptied, inserting weight information of the third item into the queue from the end of the queue;
the controller adopts the second weighing sensor to weigh a fourth commodity placed on the weighing platform in sequence, weight information of the fourth commodity is displayed on the digital display, whether the interval time from weighing the third commodity to weighing the fourth commodity is longer than a corresponding preset time is judged, if yes, the user is not in cheating force verification preparation, after characters in the queue are emptied, the weight information of the fourth commodity is inserted into the queue from the tail of the queue, otherwise, whether the weight of the fourth commodity is equal to the weight of the third commodity is judged, if yes, the user is in cheating force verification preparation and is ready to finish, the weight information of the fourth commodity is inserted into the queue from the tail of the queue, and if not, the user is not in cheating force verification preparation, after characters in the queue are emptied, inserting the weight information of the fourth commodity into the queue from the tail of the queue;
the controller judges the number of the characters in the queue in real time, controls the first weighing sensor to weigh the commodity corresponding to the fourth weight information in the queue when the number of the characters in the queue is equal to 4, and displays the weight information of the commodity detected by the first weighing sensor on the digital display; and determining whether the electronic scale has larger cheating force according to the weight information detected by the second weighing sensor and the weight information detected by the first weighing sensor which are sequentially displayed on the digital display.
2. The electronic scale with automatic dynamic adjustment of display position according to claim 1, wherein the light emitting diode is located between the lower ends of two adjacent seven segments of digital tubes.
3. The electronic scale according to claim 1, wherein the highest digit of the displayable range of the integer portion is M-1 digit, and the highest digit of the displayable range of the decimal portion is M-1 digit.
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| FR2415396A1 (en) * | 1978-01-18 | 1979-08-17 | Int Standard Electric Corp | TELEPHONE ANSWERING-RECORDER |
| CN86105996A (en) * | 1986-09-03 | 1988-03-16 | 中国科学技术大学 | High voltage digital megchma meter with self-selected measuring range |
| CN102800277A (en) * | 2012-08-13 | 2012-11-28 | 广东威创视讯科技股份有限公司 | Method for adjusting color and luminance of display equipment and display device |
| CN106054810A (en) * | 2015-04-03 | 2016-10-26 | 发那科株式会社 | Numerical control device having auto changing function for character display width |
| CN109724680A (en) * | 2019-01-18 | 2019-05-07 | 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） | Weighing anti-cheating method in market |
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| CN110132393A (en) | 2019-08-16 |
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Effective date of registration: 20210609 Address after: 321206 No.1 Fengxian Road, Baiyang street, Wuyi County, Jinhua City, Zhejiang Province Applicant after: Wuyi Dahe Electronics Co.,Ltd. Address before: 401120 No.13, Fuyun street, Yubei District, Chongqing Applicant before: Zha Changcai |
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