Sensor anti-opening device based on air pressure monitoring chip
By incorporating a pressure monitoring chip and microcontroller within the sensor, changes in internal pressure are monitored, thus solving the problem of cheating by adding a remote control device and achieving the sensor's anti-opening and anti-cheating functions.
Patent Information
- Application Number
- CN202520107665.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-16
AI Technical Summary
In existing technologies, remote control devices can easily be installed inside digital weighing sensors to cheat, resulting in the tampering of the measurement signal and making it difficult to effectively prevent and control.
A pressure monitoring chip and microcontroller are installed inside the sensor. By monitoring the pressure value and the calibrated pressure value, it can be determined whether the sensor has been turned on, thus eliminating the need for the addition of a remote control device.
This effectively prevents cheating by installing remote control devices inside the sensor, improves prevention and control capabilities, and ensures the accuracy and safety of measurement.
Smart Images
Figure CN223769628U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic weighing technology, and in particular to a sensor anti-opening device based on a barometric pressure monitoring chip. Background Technology
[0002] Digital load cells hold a crucial position in the load cell market due to their strong anti-interference capabilities and encrypted communication to prevent cheating. Driven by profit, some criminals install remote control devices inside digital load cells to alter the weight signal during measurement, indirectly changing the total price of goods for profit, causing significant losses to the country, businesses, and individuals. Current anti-cheating methods mainly include communication protocol encryption, current detection, and data jump analysis. However, the continuous emergence of new remote control devices makes inadequate prevention measures easy to fail. Therefore, how to eliminate cheating by installing remote control devices at the source is an urgent problem to be solved. Summary of the Invention
[0003] The purpose of this application is to provide a sensor anti-opening device based on a barometric pressure monitoring chip, which can solve the problem of cheating by adding a remote control device inside the sensor in the prior art.
[0004] To achieve the above objectives, this application provides the following solution:
[0005] This application provides a sensor anti-opening device based on a barometric pressure monitoring chip, comprising:
[0006] Sensors and microcontrollers;
[0007] The microcontroller is housed within the sensor;
[0008] The microcontroller is connected to the air pressure monitoring chip;
[0009] The microcontroller determines whether the sensor is turned on based on the air pressure value monitored by the air pressure monitoring chip and the calibrated air pressure value.
[0010] Furthermore, the sensor includes a digital weighing sensor.
[0011] Furthermore, the digital weighing sensor includes a sensor housing, an elastomer, and a strain gauge; a deformation space is reserved between the elastomer and the sensor housing when the elastomer deforms; the strain gauge is attached to the side of the elastomer.
[0012] Furthermore, the strain gauge includes at least one; the strain gauge generates an electrical signal when the elastic body deforms.
[0013] Furthermore, the digital weighing sensor also includes a signal conditioning circuit and an analog-to-digital converter;
[0014] The strain gauge is connected to the signal conditioning circuit;
[0015] The signal conditioning circuit is connected to the analog-to-digital converter;
[0016] The analog-to-digital converter is connected to the microcontroller;
[0017] The signal conditioning circuit receives the electrical signal from the strain gauge, amplifies, filters, compensates, and linearizes it to output an analog signal; the analog-to-digital converter converts the analog signal into a digital signal and sends it to the microcontroller.
[0018] Furthermore, the microcontroller includes a timer; the timer is configured with a preset interval time.
[0019] The microcontroller is used to acquire the air pressure value of the air pressure monitoring chip at the preset interval.
[0020] Furthermore, the sensor also includes a memory;
[0021] The memory stores the air pressure value and the calibrated air pressure value.
[0022] Furthermore, the sensor anti-opening device based on the air pressure monitoring chip also includes a display; the display is connected to the microcontroller via a communication interface.
[0023] Furthermore, a deformation space is reserved between the elastomer and the sensor housing when the elastomer deforms.
[0024] According to the specific embodiments provided in this application, the following technical effects are disclosed:
[0025] This application provides a sensor anti-tampering device based on a barometric pressure monitoring chip. The barometric pressure monitoring chip is installed inside the sensor and connected to a microcontroller. The chip monitors the internal barometric pressure of the sensor. When the sensor is illegally opened, the internal barometric pressure will inevitably change. Based on this change in pressure and the calibrated pressure, it can be determined that the sensor has been opened. Therefore, by installing a barometric pressure detection chip inside the sensor, the possibility of installing a remote control device inside the sensor for cheating can be prevented at the source, effectively improving security. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of a sensor anti-opening device based on a barometric pressure monitoring chip provided in an embodiment of this application. Detailed Implementation
[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0029] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0030] like Figure 1 As shown, this application provides a sensor anti-opening device based on a barometric pressure monitoring chip, comprising: a sensor and a microcontroller 1; the microcontroller 1 is disposed inside the sensor; the microcontroller 1 is connected to a barometric pressure monitoring chip 2; the microcontroller 1 determines whether the sensor has been opened based on the barometric pressure value monitored by the barometric pressure monitoring chip 2 and the calibrated barometric pressure value.
[0031] In some embodiments, the sensor includes a digital weighing sensor.
[0032] The digital load cell has a cavity 7 inside its housing 3, which includes an analog module and a digital module 4. If a remote control device is to be installed inside the digital load cell, the housing 3 needs to be opened to expose the analog and digital modules 4 inside the cavity 7.
[0033] In some embodiments, the digital weighing sensor includes a sensor housing 3, an elastomer, and a strain gauge 6; the strain gauge 6 is attached to the side of the elastomer; and a deformation space is reserved between the elastomer and the sensor housing 3 when the elastomer deforms.
[0034] The simulation module includes strain gauge 6.
[0035] Specifically, the elastic body includes a support body 5, a deformable body 8, and a deformable body 9. The support body 5, deformable body 8, and deformable body 9 are integrally formed. A sensor cover 10 is mounted on the support body 5. The sensor base 11 is U-shaped, and deformable bodies 8 and 9 are respectively connected to the U-shaped sidewalls of the sensor base 11. The elastic body, sensor cover 10, and sensor base 11 are all integrally formed and made of the same metal material. The sensor cover 10 is connected to the weighing platform and is used to load the object being measured.
[0036] In practical applications, the object being measured can be a car. When a car is loaded onto the weighing platform on the sensor cover 10, the deformable bodies 8 and 9 undergo slight deformation. At this time, the strain gauges 6 attached to the deformable bodies 8 and 9 convert the deformation into electrical signals.
[0037] The sensor housing is wrapped between the sensor cover 10 and the sensor base 11 to form a sealed structure.
[0038] In some embodiments, at least one strain gauge 6 is included; the strain gauge 6 generates an electrical signal when the elastic body deforms.
[0039] For example, a strain gauge can be attached to deformable body 8, and a strain gauge can be attached to deformable body 9.
[0040] In some embodiments, the digital weighing sensor further includes a signal conditioning circuit and an analog-to-digital converter; the strain gauge 6 is connected to the signal conditioning circuit; the signal conditioning circuit is connected to the analog-to-digital converter; the analog-to-digital converter is connected to the microcontroller 1; the signal conditioning circuit receives the electrical signal from the strain gauge 6, amplifies, filters, and linearizes it, and outputs an analog signal; the analog-to-digital converter converts the analog signal into a digital signal and sends it to the microcontroller 1.
[0041] Specifically, the air pressure monitoring chip 2, microcontroller 1, signal conditioning circuit and analog-to-digital converter are used as digital module 4.
[0042] The digital module 4 is located in the circular groove at the bottom of the support 5.
[0043] It is worth noting that, when the digital weighing sensor has a sealed internal structure, installing the air pressure monitoring chip 2 into the digital module 4 can prevent cheating by installing a remote control device into the digital module 4 of the sensor. In this case, when the air pressure monitoring chip 2 is installed in the digital module 4, the air pressure value in this application is the air pressure value of the cavity formed inside the sensor, monitored by the air pressure monitoring chip 2; the calibration air pressure value is obtained by calibrating the sensor after extracting air from the cavity during the manufacturing process, to ensure the sealing of the cavity. The air pressure monitoring chip 2 is also used to monitor the air pressure value inside the sensor. Both the air pressure value and the calibration air pressure value are permanently stored and can be reviewed in real time or later.
[0044] In practical applications, the analog module (not shown in the figure) includes a bridge circuit composed of strain gauges 6. The bridge circuit composed of strain gauges 6 is existing technology and will not be described further. The digital module 4 also includes a power supply. The function of the digital module 4 is to convert the small electrical signals output by the strain gauges 6 into digital signals, which are then connected to the display via a communication interface.
[0045] In some embodiments, the microcontroller 1 includes a timer. The microcontroller 1 acquires the air pressure value of the air pressure monitoring chip 2 at preset intervals according to the timer.
[0046] In some embodiments, the sensor further includes a memory; the memory stores the air pressure value and the calibration air pressure value.
[0047] In some embodiments, the sensor anti-opening device based on the barometric pressure monitoring chip further includes a display. The display is connected to the microcontroller 1 via a communication interface.
[0048] The communication ports include one or more of the following: RS-485 port, RS-232 port, CANopen port, and DeviceNet port.
[0049] In some embodiments, a deformation space is reserved between the elastomer and the sensor housing 3 when the elastomer deforms.
[0050] The deformation space is used to accommodate the volume change that occurs when the elastic body deforms, and to house circuits and wiring. The microcontroller 1 is any one of the following: a 51 microcontroller, an ARM Cortex-M series microcontroller, or a Renesas RL78 series microcontroller.
[0051] The model of the air pressure monitoring chip 2 includes, but is not limited to, WF183D.
[0052] Among them, a barometric pressure monitoring chip is used as an electronic seal for airtightness monitoring to ensure that if the sensor housing is opened, i.e., if the sensor is opened and a remote control device or other equipment is installed inside, it can be detected in time.
[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0054] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A sensor anti-tamper device based on a barometric pressure monitoring chip, characterized in that, The sensor anti-opening device of the air pressure monitoring chip comprises: a sensor and a microcontroller; the microcontroller is arranged in the sensor; the microcontroller is connected with the air pressure monitoring chip; the microcontroller determines whether the sensor is opened according to the air pressure value monitored by the air pressure monitoring chip and the calibrated air pressure value.
2. The barometric pressure monitoring chip-based sensor anti-opening device according to claim 1, characterized in that, The sensor comprises a digital weighing sensor.
3. The air pressure monitoring chip based sensor anti-opening device according to claim 2, characterized in that, The digital weighing sensor comprises a sensor shell, an elastic body and a strain gauge; the strain gauge is attached to the elastic body.
4. The barometric pressure monitoring chip-based sensor anti-opening device according to claim 3, characterized in that, The strain gauge comprises at least one; the strain gauge generates an electric signal when the elastic body is deformed.
5. The barometric pressure monitoring chip-based sensor anti-opening device according to claim 3, characterized in that, The digital weighing sensor further comprises a signal conditioning circuit and an analog-to-digital converter; the strain gauge is connected with the signal conditioning circuit; the signal conditioning circuit is connected with the analog-to-digital converter; the analog-to-digital converter is connected with the microcontroller; the signal conditioning circuit receives the electric signal of the strain gauge for amplification, filtering, compensation and linearization processing to output an analog signal; the analog-to-digital converter converts the analog signal into a digital signal and sends the digital signal to the microcontroller.
6. The barometric pressure monitoring chip-based sensor anti-tamper device of claim 1, wherein, The microcontroller comprises a timer; the timer is provided with a preset interval time; the microcontroller is used to acquire the air pressure value of the air pressure monitoring chip according to the preset interval time.
7. The barometric pressure monitoring chip-based sensor anti-tamper device of claim 1, wherein, The sensor further comprises a memory; the memory stores the air pressure value and the calibrated air pressure value.
8. The barometric pressure monitoring chip-based sensor anti-tamper device of claim 1, wherein, The sensor anti-opening device of the air pressure monitoring chip further comprises a display; the display is connected with the microcontroller through a communication interface.
9. The barometric pressure monitoring chip-based sensor anti-tamper device of claim 3, wherein, The elastic body and the sensor shell are reserved with a deformation space for deformation of the elastic body.