CN110132391B - Electronic scale with adjustable measurement precision - Google Patents
Electronic scale with adjustable measurement precision Download PDFInfo
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- CN110132391B CN110132391B CN201910431555.4A CN201910431555A CN110132391B CN 110132391 B CN110132391 B CN 110132391B CN 201910431555 A CN201910431555 A CN 201910431555A CN 110132391 B CN110132391 B CN 110132391B
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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 adjustable measurement precision, which comprises a controller, and a digital display, a first weighing sensor and a second weighing sensor which are respectively connected with the controller, wherein the measurement precision of the first weighing sensor is lower than that of the second weighing sensor; the digital display comprises three seven-segment digital tubes, a light emitting diode used for displaying decimal points is arranged between every two adjacent seven-segment digital tubes, the controller adopts a first weighing sensor and a second weighing sensor to respectively weigh the commodities placed on the weighing platform, whether ten bits before the decimal points in the weight information detected by the second weighing sensor are zero or not is judged, if yes, the controller controls to light the first light emitting diode from left to right, and the weight information detected by the second weighing sensor is displayed on each seven-segment digital tube of the digital display; otherwise, controlling to light a second light-emitting diode from left to right, and displaying the weight information detected by the first weighing sensor on a digital display.
Description
Technical Field
The invention belongs to the field of electronic scales, and particularly relates to an electronic scale with adjustable measurement precision.
Background
Electronic scales generally include a controller, a digital display, and a weighing sensor, and mainly weigh goods placed on a weighing platform by using the weighing sensor, and display the weighed goods by using the digital display. However, in some situations, the digital display is limited in position and can only be provided with fewer seven-segment nixie tubes, which results in the digital display not being able to fully display all the data within the range of the load cell. For example, the measurement accuracy of the weighing sensor is two digits before the decimal point and two digits after the decimal point, and if the digital display has only three seven-segment digital tubes, only one digit before the decimal point and two digits after the decimal point, or two digits before the decimal point and one digit after the decimal point can be displayed. Therefore, the problem that the display requirement of the weighing sensor cannot be met when seven segments of digital tubes in the digital display of the conventional electronic scale are few is solved.
Disclosure of Invention
The invention provides an electronic scale with adjustable measurement precision, which solves the problem that the display requirement of a weighing sensor cannot be met when seven-segment digital tubes in the conventional electronic scale are few.
According to a first aspect of the embodiments of the present invention, there is provided an electronic scale with adjustable measurement accuracy, including a controller, and a digital display, a first weighing sensor and a second weighing sensor respectively connected to the controller, wherein the measurement accuracy of the first weighing sensor is lower than that of the second weighing sensor, and the measurement range of the first weighing sensor includes that of the second weighing sensor; the digital display comprises three seven-segment digital tubes, a light emitting diode used for displaying decimal points is arranged between every two adjacent seven-segment digital tubes, the controller adopts the first weighing sensor and the second weighing sensor to respectively weigh the commodities placed on the weighing platform, judges whether the ten-digit position before the decimal points in the weight information detected by the second weighing sensor is zero or not, and controls to light the first light emitting diode from left to right if the ten-digit position before the decimal points in the weight information detected by the second weighing sensor is zero, and the first light emitting diode from left to right is displayed on each seven-segment digital tube of the digital display according to the left-to-right sequence from the leftmost digit value in the weight information detected by the second weighing sensor; otherwise, controlling to light a second light-emitting diode from left to right, and starting from the leftmost numerical value in the weight information detected by the first weighing sensor, displaying the numerical values on the seven sections of nixie tubes of the numerical display in the order from left to right.
In an optional implementation manner, the measurement accuracy of the second weighing sensor is two digits before the decimal point and two digits after the decimal point, and the measurement accuracy of the first weighing sensor is three digits before the decimal point and one digit after the decimal point.
In another alternative implementation, the measuring range of the electronic scale is equal to the measuring range of the second load cell.
In another optional implementation manner, the weighing system further comprises a decimal display key for displaying the second place after the decimal point, and after receiving a pressing signal of the decimal display key, the controller displays the numerical value of the second place after the decimal point in the weight information detected by the second weighing sensor on the rightmost seven-segment nixie tube, controls to light the first light emitting diode from left to right, and controls the leftmost seven-segment nixie tube and the middle seven-segment nixie tube to display zero.
In another optional implementation mode, when the cheating force is verified, the product of the weight of the commodity placed on the weighing platform and the maximum cheating available ratio is smaller than 10, wherein the maximum cheating available ratio refers to the maximum value of the display weight and the actual weight which can be found to be cheated according to weight information detected by two weighing sensors with different measurement precisions;
the controller adopts the second weighing sensor to weigh the first commodity placed on the weighing platform, inserts the weight information of the first commodity into the queue from the tail of the queue, and displays the weight information of the first commodity on the digital display when the ten position before the decimal point in the weight information of the first commodity is zero;
the controller adopts the second weighing sensor to weigh the second commodities which are sequentially placed on the weighing platform, when ten bits before the decimal point in the weight information of the second commodity are zero, displaying the weight information of the second commodity on the digital display, judging whether the interval time from weighing the first commodity to weighing the second commodity is longer than the corresponding preset time, if so, inserting 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, judging whether the weight of the second commodity is equal to that of the first commodity or not, if so, 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 equal to the weight information of the second commodity, 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 the third commodities which are sequentially placed on the weighing platform, when the ten position before the decimal point in the weight information of the third commodity is zero, displaying the weight information of the third commodity on the digital display, judging whether the interval time from weighing the second commodity to weighing the third commodity is longer than the corresponding preset time, if so, inserting the weight information of the third commodity into the queue from the tail of the queue after the characters in the queue are emptied, otherwise, judging whether the weight of the third commodity is equal to that of the second commodity, if not, inserting the weight information of the third commodity into the queue from the tail of the queue, and if the weight information of the third commodity is equal to the weight information of the third commodity, inserting the weight information of the third 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 the fourth commodities which are sequentially placed on the weighing platform, when the ten digits before the decimal point in the weight information of the fourth commodity are zero, displaying the weight information of the fourth commodity on the digital display, and judging whether the interval time from weighing the third commodity to weighing the fourth commodity is longer than the corresponding preset time, if so, inserting the weight information of the fourth commodity into the queue from the tail of the queue after the characters in the queue are emptied, otherwise, judging whether the weight of the fourth commodity is equal to that of the third commodity, if so, inserting the weight information of the fourth commodity into the queue from the tail of the queue, and if the weight information of the fourth commodity is different from the tail of the queue, inserting the weight information of the fourth commodity into the queue from the tail of the queue after characters in the queue are emptied;
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.
In another optional implementation manner, the controller empties the characters in the queue after displaying the weight information of the commodity detected by the first weighing sensor on the digital display.
The invention has the beneficial effects that:
1. according to the invention, when the number of seven-segment digital tubes in the digital display is less and the display requirements of the weighing sensors cannot be met, the measuring precision is adjusted in the measuring range by arranging two weighing sensors with different measuring precisions, so that the digital display can meet the display requirements of the weighing sensors even when the number of seven-segment digital tubes is less;
2. by arranging the two weighing sensors, the ratio of the displayed weight to the actual weight can be forced to be adjusted to be minimum by illegal personnel during modification, so that 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.
Drawings
FIG. 1 is a block diagram of an embodiment of an electronic scale with adjustable measurement accuracy according to the present invention;
fig. 2 is a block diagram of one embodiment of a digital display of 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 adjustable measurement accuracy according to the present invention is shown. The electronic scale may include a controller 110, and a digital display 120, a first load cell 130 and a second load cell 140 respectively connected to the controller 110, the first load cell having a measurement accuracy lower than that of the second load cell, the first load cell having a measurement range including that of the second load cell; referring to fig. 2, the digital display 120 includes three seven-segment nixie tubes 121, and a light emitting diode 122 for displaying a decimal point is disposed between every two adjacent seven-segment nixie tubes 121, the controller 110 uses the first weighing sensor 130 and the second weighing sensor 140 to respectively weigh the commodity placed on the weighing platform, and determines whether ten digits before the decimal point in the weight information detected by the second weighing sensor 140 are zero, if yes, it indicates that the digital display 120 can completely display the weight information detected by the second weighing sensor 140, and at this time, the controller lights the first light emitting diode from left to right, and displays the first light emitting diode on each seven-segment nixie tube of the digital display in order from left to right starting from the leftmost digit in the weight information detected by the second weighing sensor; otherwise, it indicates that the digital display 120 cannot completely display the weight information detected by the second load cell 140, and at this time, the control lights the second light emitting diode 122 from left to right, and the weight information is displayed on each seven-segment digital tube of the digital display in the order from left to right starting from the leftmost numerical value in the weight information detected by the first load cell.
In this embodiment, the measurement accuracy of the second weighing sensor is two digits before the decimal point and two digits after the decimal point, and the measurement accuracy of the first weighing sensor is three digits before the decimal point and one digit after the decimal point. For example, the weight information detected by the first load cell is 12.1, the weight information detected by the second load cell is 12.14, and since ten digits before a decimal point in the weight information detected by the second load cell are not zero, and only three seven-segment nixie tubes are arranged in the digital display, the digital display cannot completely display the weight detected by the second load cell, so that the controller controls the weight information 12.1 detected by the first load cell to be displayed. For another example, the weight information detected by the first load cell is 2.1, the weight information detected by the second load cell is 2.14, and since ten bits before the decimal point in the weight information detected by the second load cell is not zero, the digital display can completely display the weight detected by the second load cell, so that the controller controls the weight information detected by the second load cell to be 2.14.
Generally, the higher the measurement accuracy of the weighing sensor is, the smaller the measurement range thereof is, because the measurement accuracy of the first weighing sensor is lower in the invention, and correspondingly the larger the measurement range thereof is, if the measurement range of the first weighing sensor is taken as the measurement range of the electronic scale, the measurement accuracy of the second weighing sensor is reduced because the measurement range thereof is often exceeded in the using process, therefore, the measurement range of the electronic scale of the invention is equal to the measurement range of the second weighing sensor, thereby ensuring the normal use of the electronic scale. In addition, when the controller only displays the weight information detected by the first weighing sensor, obviously only the weight information can be accurate to one digit after the decimal point, which can cause the reduction of the measurement precision of the electronic scale, in order to compensate the measurement precision of the electronic scale, the electronic scale also comprises a decimal display key for displaying the second digit after the decimal point, after the controller receives a pressing signal of the decimal display key, the controller displays the numerical value of the second digit after the decimal point in the weight information detected by the second weighing sensor on the rightmost seven-segment nixie tube, controls to light the first light emitting diode from left to right, and controls the leftmost seven-segment nixie tube and the middle seven-segment nixie tube to display zero.
According to the embodiment, when the number of seven-segment digital tubes in the digital display is less and the display requirements of the weighing sensors cannot be met, the measuring precision is adjusted in the measuring range by arranging the two weighing sensors with different measuring precisions, so that the digital display can meet the display requirements of the weighing sensors even when the number of seven-segment digital tubes is less.
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.
The invention adopts two weighing sensors with completely different measurement precisions, and compares the weight information detected by the two weighing sensors on the same commodity to determine the cheating force of the electronic scale, so that the ratio of the displayed weight to the actual weight is easy to find when the ratio 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. In addition, in the invention, when ten bits before a decimal point in the weight information detected by the second weighing sensor are not zero, the weight information detected by the first weighing sensor is directly displayed, so that the weight information detected by the second weighing sensor and the weight information detected by the first weighing sensor cannot be sequentially displayed, therefore, when the cheating force is detected, the product of the weight of the commodity placed on the weighing platform and the cheating available maximum ratio is less than 10, and the cheating available maximum ratio refers to the maximum value of the displayed weight and the actual weight which can be cheated according to the weight information detected by the two weighing sensors with different measurement precisions.
Specifically, when the cheating force is verified, the controller adopts the second weighing sensor to weigh a first commodity placed on the weighing platform, the weight information of the first commodity is inserted into the queue from the tail of the queue, and as the product of the weight of the commodity placed on the weighing platform and the cheating maximum ratio is smaller than 10, namely, the tens before the decimal point in the weight information obtained after cheating is still zero, the controller displays the weight information of the first commodity detected by the second weighing sensor on the digital display when the tens before the decimal point of the weight information of the first commodity is zero; the controller adopts the second weighing sensor to weigh a second piece of commodity which is placed on the weighing platform in sequence, and when the ten-position before a decimal point in the weight information of the second piece of commodity is zero, the weight information of the second piece of commodity 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, when ten digits before a decimal point in weight information of the third commodity are zero, the 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 fact that a user is not in cheating force verification preparation is indicated, 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, the fact that the weight of the third commodity is equal to that of the second commodity is judged, if not, the fact that the user is in cheating force verification preparation is indicated, the weight information of the third commodity is inserted into the queue from the tail of the queue, and if the weight information of the third commodity is equal to the weight information of the third commodity, the user does not prepare for cheating strength verification, and the weight information of the third commodity is inserted into the queue from the tail of the queue after the characters in the queue are emptied.
The controller adopts the second weighing sensor to weigh a fourth commodity placed on the weighing platform in sequence, when the ten-digit position before the decimal point in the weight information of the fourth commodity is zero, the 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 the corresponding preset time is judged, if yes, the fact that a user is not in cheating force check preparation is indicated, 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, the fact that the weight of the fourth commodity is equal to the weight of the third commodity is judged, if yes, the fact that the user is in cheating force check preparation and the preparation is finished is indicated, the weight information of the fourth commodity is inserted into the queue from the tail of the queue, and if the weight information of the fourth commodity is different from the weight information of the fourth commodity, the user does not prepare for cheating strength verification, and the weight information of the fourth commodity is inserted into the queue from the tail of the queue after the characters in the queue are emptied.
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 (2)
1. An electronic scale with adjustable measurement precision is characterized by comprising a controller, and a digital display, a first weighing sensor and a second weighing sensor which are respectively connected with the controller, wherein 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 that of the second weighing sensor; the digital display comprises three seven-segment digital tubes, a light emitting diode used for displaying decimal points is arranged between every two adjacent seven-segment digital tubes, the controller adopts the first weighing sensor and the second weighing sensor to respectively weigh the commodities placed on the weighing platform, judges whether the ten-digit position before the decimal points in the weight information detected by the second weighing sensor is zero or not, and controls to light the first light emitting diode from left to right if the ten-digit position before the decimal points in the weight information detected by the second weighing sensor is zero, and the first light emitting diode from left to right is displayed on each seven-segment digital tube of the digital display according to the left-to-right sequence from the leftmost digit value in the weight information detected by the second weighing sensor; otherwise, controlling to light a second light-emitting diode from left to right, and starting from the leftmost numerical value in the weight information detected by the first weighing sensor, displaying the numerical values on the seven sections of nixie tubes of the numerical display in a sequence from left to right;
when the cheating force is verified, the product of the weight of the commodity placed on the weighing platform and the maximum cheating available ratio is smaller than 10, and the maximum cheating available ratio refers to the maximum value of the displayed weight and the actual weight which can be found to be cheated according to weight information detected by two weighing sensors with different measurement precisions;
the controller adopts the second weighing sensor to weigh the first commodity placed on the weighing platform, inserts the weight information of the first commodity into the queue from the tail of the queue, and displays the weight information of the first commodity on the digital display when the ten position before the decimal point in the weight information of the first commodity is zero;
the controller adopts the second weighing sensor to weigh the second commodities which are sequentially placed on the weighing platform, when ten bits before the decimal point in the weight information of the second commodity are zero, displaying the weight information of the second commodity on the digital display, judging whether the interval time from weighing the first commodity to weighing the second commodity is longer than the corresponding preset time, if so, inserting 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, judging whether the weight of the second commodity is equal to that of the first commodity or not, if so, 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 equal to the weight information of the second commodity, 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 the third commodities which are sequentially placed on the weighing platform, when the ten position before the decimal point in the weight information of the third commodity is zero, displaying the weight information of the third commodity on the digital display, judging whether the interval time from weighing the second commodity to weighing the third commodity is longer than the corresponding preset time, if so, inserting the weight information of the third commodity into the queue from the tail of the queue after the characters in the queue are emptied, otherwise, judging whether the weight of the third commodity is equal to that of the second commodity, if not, inserting the weight information of the third commodity into the queue from the tail of the queue, and if the weight information of the third commodity is equal to the weight information of the third commodity, inserting the weight information of the third 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 the fourth commodities which are sequentially placed on the weighing platform, when the ten digits before the decimal point in the weight information of the fourth commodity are zero, displaying the weight information of the fourth commodity on the digital display, and judging whether the interval time from weighing the third commodity to weighing the fourth commodity is longer than the corresponding preset time, if so, inserting the weight information of the fourth commodity into the queue from the tail of the queue after the characters in the queue are emptied, otherwise, judging whether the weight of the fourth commodity is equal to that of the third commodity, if so, inserting the weight information of the fourth commodity into the queue from the tail of the queue, and if the weight information of the fourth commodity is different from the tail of the queue, inserting the weight information of the fourth commodity into the queue from the tail of the queue after characters in the queue are emptied;
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 adjustable measurement precision as claimed in claim 1, wherein the controller empties the characters in the queue after displaying the weight information of the commodity detected by the first weighing sensor on the digital display.
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