Digital weighing sensor anti-opening device

Abstract

The utility model discloses an anti-opening device for a digital weighing sensor, and relates to the technical field of electronic weighing, and the device comprises a vulnerable electronic tag and an electronic tag reading module. The vulnerable electronic tag covers the digital module, the analog circuit and a connecting line between the digital module and the analog circuit, and the cavity is filled with opaque glue; the vulnerable electronic tag, the digital module, the analog circuit and the connecting line are sealed by non-transparent glue; the electronic tag reading module reads the real-time identification number of the vulnerable electronic tag and sends the real-time identification number to the main control chip; the main control chip sends a comparison result of the real-time identification number of the vulnerable electronic tag and the preset unique identification number to the weighing display for display; the comparison result comprises a consistent state and an inconsistent state, and the inconsistent state represents that the digital weighing sensor is turned on. According to the invention, a user can be reminded in time when the digital weighing sensor is turned on, and property loss is avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electronic weighing, in particular to a digital weighing sensor anti-opening device. BACKGROUND

[0002] The digital weighing sensor has a strong anti-interference capability, can be communicated and encrypted, and can prevent cheating, and thus plays an important role in the weighing sensor market. The digital weighing system mainly comprises a digital weighing sensor and a weighing display. Due to interests, some unscrupulous people will install a remote control device on the digital weighing sensor to change the weight signal during the measurement process, indirectly change the total price of the goods, and thus make profits, causing huge losses to the state, enterprises and individuals. At present, the main prevention and control methods for cheating include communication protocol encryption, current detection and data jump analysis. However, new types of remote control devices are constantly emerging, which can easily cause improper prevention and control. Therefore, how to prevent the cheating behavior of adding a remote control device at the source needs to be solved. CONTENT OF THE INVENTION

[0003] The application aims to provide a digital weighing sensor anti-opening device which can timely remind the user when the digital weighing sensor is opened, so as to avoid property loss.

[0004] To achieve the above-mentioned purpose, the application provides the following solutions.

[0005] In a first aspect, the application provides a digital weighing sensor anti-opening device applied to a digital weighing system, wherein the digital weighing system comprises a digital weighing sensor and a weighing display, the digital weighing sensor comprises a digital module and an analog circuit, the digital module comprises a master control chip, the master control chip is connected with the analog circuit and the weighing display respectively, the analog circuit is used for generating an analog signal according to the real-time weight of a measured object, the digital module comprises a digital-to-analog conversion unit, the analog circuit sends the analog signal to the digital-to-analog conversion unit, the digital-to-analog conversion unit converts the analog signal into a digital signal and sends the digital signal to the master control chip, the master control chip sends the digital signal to the weighing display for display, a cavity is arranged in the shell of the digital weighing sensor, the analog circuit and the digital module are arranged in the cavity, and the digital weighing sensor anti-opening device comprises a fragile electronic tag and an electronic tag reading module.

[0006] The fragile electronic tag covers the digital module, the analog circuit and the connection line between the digital module and the analog circuit, and the cavity is filled with opaque glue; the opaque glue seals the fragile electronic tag, the digital module, the analog circuit and the connection line.

[0007] The output end of the vulnerable electronic tag is connected with one end of the electronic tag reading module, the other end of the electronic tag reading module is connected with the first communication pin of the master control chip, the electronic tag reading module is used for reading the real-time identification number of the vulnerable electronic tag and sending the real-time identification number to the master control chip; the master control chip compares the real-time identification number with the preset unique identification number of the vulnerable electronic tag, and sends the comparison result to the weighing display; the comparison result includes consistent state and inconsistent state, and the inconsistent state represents that the digital weighing sensor is opened.

[0008] Further, the digital weighing sensor anti-opening device further comprises a storage module, a communication end of the storage module is connected with the third communication pin of the master control chip, and the storage module is used for receiving and storing the real-time identification number of the vulnerable electronic tag sent by the master control chip.

[0009] Further, the electronic tag reading module comprises an electronic tag reading chip and a PCB antenna.

[0010] One end of the PCB antenna is wirelessly connected with the output end of the vulnerable electronic tag, the other end of the PCB antenna is connected with the antenna pin of the electronic tag reading chip, and the PCB antenna is used for reading the real-time identification number of the vulnerable electronic tag and sending the real-time identification number of the vulnerable electronic tag to the electronic tag reading chip.

[0011] The communication pin of the electronic tag reading chip is connected with the first communication pin of the master control chip, and the electronic tag reading chip is used for sending the real-time identification number of the vulnerable electronic tag to the master control chip.

[0012] Further, the analog circuit comprises at least two strain gauges, and the strain gauges are used to generate analog signals according to the real-time weight of the object to be measured.

[0013] Further, the digital module further comprises an analog-to-digital conversion unit.

[0014] The input end of the analog-to-digital conversion unit is connected with the signal output end of the strain gauge, the output end of the analog-to-digital conversion unit is connected with the second communication pin of the master control chip, and the analog-to-digital conversion unit is used for converting the analog signal of the real-time weight of the object to be measured into the digital signal of the real-time weight of the object to be measured.

[0015] Further, the third communication pin of the master control chip is connected with the weighing display through a 485 communication interface.

[0016] Further, the digital weighing sensor further comprises an elastic body, the strain gauges are arranged on the side of the elastic body, and the part of the elastic body provided with the strain gauges is arranged in the inside of the shell and forms the cavity with the shell.

[0017] Further, the digital weighing sensor further comprises a power supply connected with the power supply pins of the analog-digital conversion unit and the master control chip respectively, for supplying power for the analog-digital conversion unit and the master control chip.

[0018] Further, the master control chip adopts any one of a 51 single-chip microcomputer, an arm cortex-m series microcontroller, and a RISa RL78 series microcontroller.

[0019] According to the specific embodiments provided in the application, the following technical effects are disclosed.

[0020] The application provides a digital weighing sensor anti-opening device, which covers a fragile electronic tag on a digital module, an analog circuit and a connecting line between the digital module and the analog circuit of the digital weighing sensor, and seals the fragile electronic tag in a cavity by using opaque glue, so that if the digital weighing sensor is opened, the fragile electronic tag is damaged, the real-time identification number of the fragile electronic tag read by an electronic tag reading module is inconsistent with a preset unique identification number, indicating that the digital weighing sensor is opened, and a user is reminded in time through a weighing display, so that a protection effect is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0022] Figure 1 FIG. 1 is a schematic view of the position relationship of various components in an embodiment of the digital weighing sensor anti-opening device of the application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0024] In order to make the above objects, characteristics and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0025] The digital weighing sensor anti-opening device provided by the embodiment of the present application is applied to a digital weighing system. The digital weighing system comprises a digital weighing sensor and a weighing display. Figure 1 As shown in the figure, the digital weighing sensor comprises a digital module 2 and an analog circuit 6, the digital module 2 comprises a master control chip 3, the master control chip 3 is connected with the analog circuit 6 and the weighing display respectively, the analog circuit 6 is used to generate an analog signal according to the real-time weight of an object to be measured, and the analog signal is sent to the weighing display through the digital module 2 for display, and a cavity 5 is arranged in the inside of a shell 8 of the digital weighing sensor.

[0026] The digital weighing sensor anti-opening device provided by the embodiment of the present application comprises a fragile electronic tag 1 and an electronic tag reading module. The fragile electronic tag 1 is covered on the digital module 2, the analog circuit 6 and the connecting line between the digital module 2 and the analog circuit 6, and the inside of the cavity 5 is filled with opaque glue; the opaque glue seals the fragile electronic tag 1, the digital module 2, the analog circuit 6 and the connecting line.

[0027] The output end of the fragile electronic tag 1 is connected with one end of the electronic tag reading module, the other end of the electronic tag reading module is connected with the first communication pin of the master control chip 3, the electronic tag reading module sends the real-time identification number of the fragile electronic tag 1 read to the master control chip 3; the master control chip 3 compares the real-time identification number of the fragile electronic tag 1 with the preset unique identification number of the fragile electronic tag, and sends the comparison result to the weighing display for display, the preset unique identification number is the unique identification number when the fragile electronic tag is complete, and the unique identification number is a global unique identification number; the comparison result comprises a consistent state and an inconsistent state, and the inconsistent state represents that the digital weighing sensor is opened.

[0028] The real-time identification number of the fragile electronic tag 1 comprises a real-time unique identification number and null, the null represents that the fragile electronic tag is damaged and there is no identification number; the real-time unique identification number can be the unique identification number when the fragile electronic tag is complete, or the unique identification number of other fragile electronic tags; when the original fragile electronic tag is replaced by another electronic tag after being damaged, the real-time identification number and the preset unique identification number are also in the inconsistent state, which represents that the digital weighing sensor is opened.

[0029] When the digital load cell is installed and works normally, the main control chip 3 on the digital module 2 intermittently reads the real-time identification number of the vulnerable electronic tag 1 through the timer, and sends the real-time identification number to the main control chip 3 for comparison, and the comparison result is displayed through the load display. The information displayed determines whether the digital load cell is opened.

[0030] The main control chip 3 in the embodiment adopts any one of 51 single-chip microcomputer, arm cortex-m series microcontroller, RISa RL78 series microcontroller and the like.

[0031] In an exemplary embodiment, the electronic tag reading module comprises an electronic tag reading chip 4 and a PCB antenna.

[0032] The PCB antenna is specifically a PCB on-board antenna, one end of the PCB antenna is wirelessly connected to the output end of the vulnerable electronic tag 1, the other end of the PCB antenna is connected to the antenna pin of the electronic tag reading chip 4, and the PCB antenna is used to read the real-time identification number of the vulnerable electronic tag 1 and send the real-time identification number of the vulnerable electronic tag 1 to the electronic tag reading chip 4.

[0033] The communication pin of the electronic tag reading chip 4 is connected to the first communication pin of the main control chip 3, the electronic tag reading chip 4 is used to send the real-time identification number of the vulnerable electronic tag 1 to the main control chip 3, the main control chip 3 compares the real-time identification number of the vulnerable electronic tag 1 with the preset unique identification number, and sends the comparison result to the load display.

[0034] In an exemplary embodiment, the digital load cell opening prevention device further comprises a storage module, the communication end of the storage module is connected to the third communication pin of the main control chip 3, and the storage module is used to receive and store the state of the vulnerable electronic tag 1 sent by the main control chip 3.

[0035] Before leaving the factory, the digital load cell is calibrated, the preset unique identification number of the vulnerable electronic tag 1 is read by the electronic tag reading chip 4, and is permanently saved in the storage module.

[0036] When the digital load cell is installed and works normally, the main control chip 3 on the digital module 2 intermittently reads the real-time identification number of the vulnerable electronic tag 1. When the real-time identification number of the vulnerable electronic tag 1 cannot be read for a period of time, or the real-time identification number of the vulnerable electronic tag 1 read is inconsistent with the preset unique identification number saved at the time of calibration, it is judged that the digital load cell is opened, and there is a suspicion of adding a remote control device. The storage module permanently saves the real-time identification number of the vulnerable electronic tag 1 and the comparison result when the digital load cell is opened.

[0037] In an exemplary embodiment, the analog circuit comprises at least two strain gauges 6 for generating an analog signal according to the real-time weight of the object to be measured.

[0038] In an exemplary embodiment, the digital module 2 further comprises an analog-digital conversion unit;

[0039] The input end of the analog-digital conversion unit is connected with the signal output end of the strain gauges 6, and the output end of the analog-digital conversion unit is connected with the second communication pin of the master chip 3, and the analog-digital conversion unit is used for converting the analog signal of the real-time weight of the object to be measured into a digital signal of the real-time weight of the object to be measured.

[0040] In an exemplary embodiment, the third communication pin of the master chip 3 is connected with the weighing display through a 485 communication interface.

[0041] In an exemplary embodiment, the digital weighing sensor further comprises an elastic body 7, the strain gauges 6 are arranged on the side surface of the elastic body 7, the elastic body 7 is arranged with the part of the strain gauges 6 inside the shell 8, and the shell 8 forms the cavity 5 with the shell 8, recesses are arranged on the upper cover 10 of the digital weighing sensor and the base 11 of the digital weighing sensor, and the shell 8 is fixed on the digital weighing sensor through the recesses.

[0042] In an exemplary embodiment, the digital weighing sensor further comprises a power supply, the power supply is connected with the power supply pins of the analog-digital conversion unit and the master chip 3 respectively, and is used for supplying power to the analog-digital conversion unit and the master chip 3.

[0043] The digital weighing sensor anti-opening device provided by the application uses a fragile electronic tag 1 as an electronic lead seal, so that once the digital weighing sensor in the digital weighing system is opened, the internal remote control device and other equipment can be found in time. At the same time, the real-time identification number of the detected fragile electronic tag 1 and the comparison result are permanently saved, and real-time reminders or post-checks can be made.

[0044] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of related data need to comply with relevant regulations.

[0045] The principles and implementation manners of the present application are described herein by using specific examples, and the above examples are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will have changes. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A digital weighing sensor anti-opening device applied to a digital weighing system, the digital weighing system comprising a digital weighing sensor and a weighing display, the digital weighing sensor comprising a digital module and an analog circuit, the digital module comprising a master control chip, the master control chip being connected with the analog circuit and the weighing display respectively, the analog circuit being used for generating an analog signal according to a real-time weight of an object to be measured, the digital module comprising a digital-to-analog conversion unit, the analog circuit sending the analog signal to the digital-to-analog conversion unit, the digital-to-analog conversion unit converting the analog signal into a digital signal and sending the digital signal to the master control chip, the master control chip sending the digital signal to the weighing display for display, a cavity being arranged inside a shell of the digital weighing sensor, the analog circuit and the digital module being placed inside the cavity, characterized in that, The digital weighing sensor anti-opening device comprises a fragile electronic tag and an electronic tag reading module; The fragile electronic tag is covered on the digital module, the analog circuit and the connecting line between the digital module and the analog circuit, and the inside of the cavity is filled with opaque glue; the opaque glue seals the fragile electronic tag, the digital module, the analog circuit and the connecting line; One end of the output end of the fragile electronic tag is connected with the electronic tag reading module, and the other end of the electronic tag reading module is connected with the first communication pin of the master control chip; the electronic tag reading module is used for reading the real-time identification number of the fragile electronic tag and sending the real-time identification number to the master control chip; the master control chip compares the real-time identification number with the preset unique identification number of the fragile electronic tag and sends the comparison result to the weighing display; the comparison result comprises a consistent state and an inconsistent state, and the inconsistent state represents that the digital weighing sensor is opened.

2. A digital load cell anti-tamper device according to claim 1, wherein, The digital weighing sensor anti-opening device further comprises a storage module, the communication end of the storage module is connected with the third communication pin of the master control chip, and the storage module is used for receiving and storing the real-time identification number of the fragile electronic tag and the comparison result sent by the master control chip.

3. The digital load cell anti-opening device according to claim 1, characterized in that, The electronic tag reading module comprises an electronic tag reading chip and a PCB antenna; One end of the PCB antenna is wirelessly connected with the output end of the fragile electronic tag, and the other end of the PCB antenna is connected with the antenna pin of the electronic tag reading chip; the PCB antenna is used for reading the real-time identification number of the fragile electronic tag and sending the real-time identification number of the fragile electronic tag to the electronic tag reading chip; The communication pin of the electronic tag reading chip is connected with the first communication pin of the master control chip, and the electronic tag reading chip is used for sending the real-time identification number of the fragile electronic tag to the master control chip.

4. The digital load cell anti-opening device according to claim 1, characterized in that, The analog circuit comprises at least two strain gauges, and the strain gauges are used for generating analog signals according to the real-time weight of the object to be measured.

5. A digital load cell anti-tamper device according to claim 4, wherein, The digital module further comprises an analog-digital conversion unit; The input end of the analog-digital conversion unit is connected with the signal output end of the strain gauge, the output end of the analog-digital conversion unit is connected with the second communication pin of the master control chip, and the analog-digital conversion unit is used for converting the analog signals of the real-time weight of the object to be measured into digital signals of the real-time weight of the object to be measured.

6. The digital load cell anti-tamper device of claim 1, wherein, The third communication pin of the master control chip is connected with the weighing display through a 485 communication interface.

7. The digital load cell anti-tamper device of claim 4, wherein, The digital weighing sensor further comprises an elastic body, the strain gauges are arranged on the side surface of the elastic body, the part of the elastic body, on which the strain gauges are arranged, is arranged in the inside of the shell and forms the cavity with the shell.

8. The digital load cell anti-opening device according to claim 5, characterized in that, The digital weighing sensor further comprises a power supply, the power supply is connected with the power supply pins of the analog-digital conversion unit and the master control chip respectively and is used for supplying power to the analog-digital conversion unit and the master control chip.

9. The digital load cell anti-tamper device of claim 1, wherein, The master control chip adopts any one of a 51 single-chip microcomputer, an arm cortex-m series microcontroller, and a RISSA RL78 series microcontroller. The master control chip adopts any one of a 51 single-chip microcomputer, an arm cortex-m series microcontroller, and a RISSA

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