Anti-disassembly detection device and method of anti-fraud weighing sensor

Abstract

This invention discloses an anti-tamper detection device and method for an anti-cheating weighing sensor. Anti-tamper connection structures are formed between the elastic body and the ball head of the housing, and at the bottom of the base, respectively. These physical structures prevent unauthorized disassembly. Simultaneously, a closed light-shielding cavity is formed inside the elastic body, ensuring that the photosensitive detection module is in a dark environment in the initial state. Therefore, when the housing is disassembled, the sensor can sensitively detect the internal lighting environment and generate a photosensitive signal to trigger an alarm, thereby improving detection sensitivity. This forms a dual anti-tamper system combining physical protection and photosensitive detection, improving the stability and reliability of the anti-tamper detection. Furthermore, when the housing is disassembled and resealed, the closed light-shielding cavity is re-formed inside the elastic body, again providing a dark environment for the photosensitive detection module. This allows the module to resume operation without replacing any components, reducing maintenance costs, avoiding material waste, and enabling long-term repeated use.

Description

Technical Field

[0001] This invention relates to the field of weighing technology, and more specifically to an anti-tamper detection device for an anti-cheating weighing sensor. Background Technology

[0002] Weighing sensors are widely used in trade weighing fields such as weighbridges and truck scales. The measurement data of these sensors directly affects the fairness of trade settlements and economic benefits; even minor measurement deviations can cause significant economic losses. Currently, weighing fraud is rampant. Criminals disassemble the sensor housing, modify the internal circuitry or elastic element of the weighing sensor, and artificially alter the weighing readings to gain illegal profits.

[0003] In existing technologies, common anti-cheating techniques mainly rely on physical identifiers such as lead seals or one-time labels, or, as disclosed in Chinese Patent No. CN 223179633 U, an anti-cheating weighing scale using a mechanical button-type anti-tamper structure that automatically blocks weighing data transmission when the casing is separated. However, this can only be passively detected after disassembly, lacking real-time monitoring and early warning capabilities, and suffers from drawbacks such as mechanical wear, limited lifespan, and susceptibility to bypassing. Furthermore, the anti-tamper structure employs a one-time destructive design, requiring component replacement after disassembly for restoration, resulting in high maintenance costs and cumbersome resetting. Chinese Patent No. CN 222336534 U also discloses an anti-cheating intelligent weighing device that compares sensor current detection with a benchmark; deviations from a preset value indicate the presence of a cheating device connected to the sensor and trigger an alarm. However, the current from the cheating device is easily masked or modified, resulting in low detection sensitivity and difficulty in effectively identifying concealed disassembly.

[0004] Therefore, how to effectively improve the detection sensitivity of anti-cheating weighing sensors, reduce maintenance and reset costs, and ensure that they are not easily bypassed and are stable and reliable has become an urgent problem to be solved in this field. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide an anti-tamper detection device and method for a cheating weighing sensor that features high detection sensitivity, convenient maintenance and reset, and stable and reliable operation.

[0006] To achieve the above objectives, the present invention provides an anti-tamper detection device for an anti-cheating weighing sensor, comprising a housing of the weighing sensor, a photosensitive detection module, and a control module. The housing includes a ball head, an elastomer, a support, and a base. A first anti-tamper connection structure is formed between the elastomer and the ball head, and a second anti-tamper connection structure is formed at the bottom of the base. The elastomer is sealed to the ball head and the support, respectively, forming a closed light-shielding cavity inside the elastomer. The photosensitive detection module is disposed inside the closed light-shielding cavity and can sense the lighting environment inside the housing and generate a photosensitive signal. The control module can collect the photosensitive signal and compare it with a preset photosensitive threshold to generate an alarm signal.

[0007] Furthermore, the top surface of the elastomer is formed with a mounting groove for engaging with the ball head, and mounting holes are formed in the mounting groove. The bottom surface of the base is also provided with mounting holes for fixing the housing, and the mounting holes are configured as conical countersunk holes.

[0008] Furthermore, the bottom of the base is also provided with anti-tamper screws for engaging with the mounting holes. The head of the anti-tamper screw is accommodated in the mounting hole, and an anti-tamper groove is formed on its top surface.

[0009] Furthermore, the photosensitive detection module includes a circuit board, an AD conversion chip, and a photoresistor. The AD conversion chip and the photoresistor are integrated on the circuit board, and the photosensitive surface of the photoresistor faces the seam direction of the housing.

[0010] Furthermore, a light shield is formed inside the elastomer, the bottom of which is sealed to the circuit board and covers the photosensitive surface of the photoresistor.

[0011] Furthermore, the inner surface of the light shield is also provided with an anti-glare texture.

[0012] Furthermore, the control module can continuously acquire the resistance value of the photoresistor in the initial state and calculate the average resistance value to generate a reference dark resistance value.

[0013] Furthermore, the control module can also calculate and process the reference dark resistance value to set the photosensitive threshold.

[0014] Furthermore, the control module is configured with continuous acquisition confirmation logic, which generates an alarm signal when the continuously acquired photosensitive signal is lower than the photosensitive threshold and the preset continuous acquisition conditions are met.

[0015] To achieve the above objectives, the present invention provides an anti-tamper detection method for an anti-cheating weighing sensor, based on the aforementioned anti-tamper detection device for the anti-cheating weighing sensor, wherein the anti-tamper detection method includes: The control module acquires the initial photosensitive signal from the photosensitive detection module in the initial state of the sealed connection of the housing, and calculates and processes the initial photosensitive signal to generate a photosensitive threshold. The photosensitive detection module senses the lighting environment inside the housing in real time within the sealed, light-shielding cavity and generates a photosensitive signal. The control module collects the photosensitive signal and compares it with a preset photosensitive threshold. If the control module determines that the housing has been disassembled, it generates an alarm signal. The housing is reset and sealed. The control module re-acquires the initial photosensitive signal from the photosensitive detection module and calculates and processes the initial photosensitive signal to update the photosensitive threshold.

[0016] The anti-tamper detection device and method for the anti-cheating weighing sensor provided by this invention forms anti-tamper connection structures between the elastic body and the ball head of the housing, and at the bottom of the base, respectively. These physical structures prevent illegal disassembly. At the same time, a closed light-shielding cavity is formed inside the elastic body, which ensures that the photosensitive detection module is in a dark environment in the initial state. Thus, when the housing is disassembled, it can sensitively detect the light environment inside the housing and generate a photosensitive signal to trigger an alarm, thereby improving detection sensitivity. This forms a dual anti-tamper system that combines physical protection and photosensitive detection, improving the stability and reliability of the anti-tamper detection.

[0017] Furthermore, when the housing is disassembled and resealed, a closed light-shielding cavity is re-formed inside the elastomer, providing a light-free environment for the photosensitive detection module again. It can resume operation without replacing any parts, reducing maintenance costs, avoiding material waste, and enabling long-term repeated use. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 A schematic diagram of the overall structure of the anti-tamper detection device for the anti-cheating weighing sensor provided by the present invention; Figure 2 A cross-sectional schematic diagram of the anti-tamper detection device for the anti-cheating weighing sensor provided by the present invention; Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 This is a schematic diagram of the elastic body placement groove structure in this invention; Figure 5 This is a schematic diagram of the bottom structure of the base in this invention; Figure 6 This is a system block diagram of the control module in this invention; Figure 7 The flowchart shows the anti-tamper detection method for the anti-cheating weighing sensor provided by the present invention.

[0020] Figure label: 1. Housing; 11. Ball head; 12. Elastomer; 121. Mounting groove; 122. Sunshade; 13. Support; 14. Base; 15. Enclosed sunshade cavity; 16. Mounting hole; 17. Anti-tamper screw; 171. Anti-tamper groove; 2. Photosensitive detection module; 21. Circuit board; 22. AD conversion chip; 23. Photoresistor; 3. Control module; 31. Processing unit; 32. Communication unit; 33. Power supply unit. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0022] See Figure 1 and Figure 2 The image shows an example of an anti-tamper detection device for an anti-cheating weighing sensor provided by the present invention.

[0023] As shown in the figure, the anti-tamper detection device of the anti-cheating weighing sensor in this example mainly includes the housing 1 of the weighing sensor, the photosensitive detection module 2, and the control module 3.

[0024] The housing 1 includes a ball head 11, an elastomer 12, a support 13, and a base 14. The elastomer 12 and the ball head 11 form a first anti-tamper connection structure, and the bottom of the base 14 forms a second anti-tamper connection structure. The elastomer 12 is sealed to the ball head 11 and the support 13 respectively. A closed light-shielding cavity 15 is formed inside the elastomer 12. The photosensitive detection module 2 is set inside the closed light-shielding cavity 15 and can sense the light environment inside the housing 1 and generate a photosensitive signal. The control module 3 can collect the photosensitive signal and compare it with a preset photosensitive threshold to generate an alarm signal, thereby improving the detection sensitivity and forming a dual anti-tamper system that combines physical protection and photosensitive detection, improving the stability and reliability of the anti-tamper detection.

[0025] Furthermore, when the housing 1 is disassembled and resealed, the elastomer 12 re-forms a closed light-shielding cavity 15, providing a light-free environment for the photosensitive detection module 2 again. It can resume operation without replacing any parts, reducing maintenance costs, avoiding material waste, and enabling long-term repeated use.

[0026] Combination Figure 2 and Figure 4The top surface of the elastic body 12 has a mounting groove 121 for engaging with the ball head 11, and the inner surface of the mounting groove 12 is configured to conform to the curvature of the ball head 11, so that the ball head 11 can be stably mounted in the mounting groove 121. Through the engagement of the ball head 11 and the mounting groove 121, the automatic centering and adaptive angle fine adjustment of the ball head 11 can be achieved, effectively offsetting the lateral force and bending moment caused by the installation deviation of the housing or the structural tilt, avoiding stress concentration, ensuring that the load acts perpendicularly on the weighing sensor, and improving the measurement accuracy.

[0027] Furthermore, a mounting hole 16 is formed in the bottom of the mounting groove 121. The mounting hole 16 is configured as a tapered countersunk hole extending into the interior of the elastic body 12, so that the ball head 11 can be engaged with the mounting hole 16 by screws to achieve a stable connection between the ball head 11 and the elastic body 12.

[0028] Meanwhile, because the mounting hole 16 is a tapered countersunk hole, ordinary sockets used to engage with screws cannot fully extend into the mounting hole 16 to precisely engage with the screw head. Only a special tapered socket adapted to this tapered countersunk hole can be used to extend into the mounting hole 16 and engage with the screw head, thus enabling the screw to be removed or installed. This connection structure constitutes the first anti-disassembly connection structure, increasing the difficulty of disassembly by limiting the use of special disassembly tools, and preventing unauthorized disassembly through physical structure.

[0029] Furthermore, when the ball head 11 is securely connected in the mounting groove 121, the surface of the ball head 11 can cover the mounting hole 16, thereby sealing the connection with the elastomer 12 and achieving light shielding of the interior of the elastomer 12.

[0030] Combination Figure 6 Similarly, the bottom surface of the base 14 also has mounting holes 16 for fixing the entire housing 1. Anti-tamper screws 17 engage with the mounting holes 16 to fix the base 14 in the installation position. The head of the anti-tamper screw 17 is completely accommodated within the mounting hole 16, and its top surface is lower than the bottom surface of the base 14. An anti-tamper groove 171 is formed on the top surface of the anti-tamper screw 17. Preferably, the anti-tamper groove 171 is configured as an inner triangular groove, so that the anti-tamper screw 17 can only be installed and removed using an inner triangular sleeve tool adapted to the anti-tamper groove 171. This connection structure constitutes a second anti-tamper connection structure, increasing the difficulty of disassembly by limiting the use of specialized disassembly tools, and preventing unauthorized disassembly through physical structure.

[0031] Based on the above structure, anti-disassembly connection structures are formed between the elastic body 12 and the ball head 11 of the housing 1, and at the bottom of the base 14, respectively, forming physical protection. By preventing illegal disassembly through physical structures, the housing 1 can be effectively prevented from being disassembled, thereby improving the stability and reliability of the weighing sensor.

[0032] To further ensure that the weighing data of the load cell is not tampered with and to monitor and alarm the disassembly of housing 1, this anti-tamper detection device adds a photosensitive detection mechanism on the basis of physical protection, so as to form a dual anti-tamper system that combines physical protection and photosensitive detection, thereby improving the stability and reliability of anti-tamper detection.

[0033] Combination Figure 2 Specifically, the elastomer 12 is sealed to the ball head 11 and the support 13 respectively, so that a closed light-shielding cavity 15 is formed inside the elastomer 12. The photosensitive detection module 2 can be set inside the closed light-shielding cavity 15. When the housing 1 is disassembled, it can promptly sense the light environment inside the housing 1 and generate a photosensitive signal. At the same time, the control module 2 can collect the photosensitive signal and compare it with the preset photosensitive threshold to generate an alarm signal, so as to realize reliable monitoring and alarm when the housing 1 is disassembled.

[0034] The outer surface of the elastomer 12 is configured as an opaque surface to ensure the light-blocking properties of the sealed light-shielding cavity 15. Preferably, in this example, the middle part of the elastomer 12 is configured as a drum shape with an inwardly concave curved surface on its periphery, which can effectively optimize the linearity, hysteresis, and measurement consistency of the weighing sensor and improve the overall detection performance.

[0035] Furthermore, the two ends of the support 13 are connected to the elastomer 12 and the base 14 respectively, and a sealing ring and a sealing adhesive layer are provided at the connection to ensure the sealing of the support 13 with the elastomer 12 and the base 14, reduce the light transmittance, and make the closed light-shielding cavity 15 formed inside the elastomer 12 a light-free environment in the initial state of connection of the housing 1, so as to ensure that the photosensitive detection module 2 will not generate abrupt photosensitive signals in the light-free closed light-shielding cavity 15.

[0036] Combination Figure 3 In conjunction with this, the photosensitive detection module 2 includes a circuit board 21, an AD conversion chip 22, and a photoresistor 23. The AD conversion chip 22 and the photoresistor 23 are integrated on the circuit board 21, and the photosensitive surface of the photoresistor 23 faces the seam direction of the housing 1, that is, towards the connection between the ball head 11 and the elastomer 12. When the housing 1 is disassembled, it can promptly sense the lighting environment inside the housing 1 and generate a photosensitive signal.

[0037] The elastomer 12 also has a light shield 122 inside. The light shield 122 is preferably configured as an inverted bowl shape, and the bottom of the light shield 122 is sealed to the circuit board 21. The photosensitive detection module 2 is built into the light shield 122, so that the light shield 122 covers the photosensitive surface of the photoresistor 23, further ensuring that the photosensitive detection module 2 is in a light-free environment in the initial state of the sealed connection of the housing 1.

[0038] Furthermore, the inner surface of the light shield 122 is also provided with an anti-light texture, which is preferably composed of V-shaped grooves densely distributed on the inner surface of the light shield 122, which can effectively absorb reflected light inside the housing 1.

[0039] Based on the above structure, no matter where criminals attempt to disassemble the housing 1 from the ball head 11, the connection between the elastomer 12 and the support 13, or the base 14, they will damage the overall sealing of the housing 1. This will cause external light to enter the closed light-shielding cavity 15 through the gaps in the housing 1 and irradiate the photosensitive surface of the photoresistor 23, causing a change in the resistance value of the photoresistor 23. This enables omnidirectional detection of the housing 1 without any blind spots.

[0040] Meanwhile, the photoresistor 23 is covered by the light shield 122 and arranged deep inside the housing 1, so that criminals cannot locate the photoresistor 23 without opening the housing 1, and cannot block or shield the photoresistor 23 in advance. This can effectively improve the reliability of anti-tamper detection and eliminate the possibility of illegally bypassing the detection.

[0041] Furthermore, the signal output terminal of the photoresistor 23 is connected to the analog signal input terminal of the AD converter chip 22 through a voltage divider circuit, and the digital signal output terminal of the AD converter chip 22 is connected to the control module 3.

[0042] Therefore, when the housing 1 is disassembled, external light shines into the closed light-shielding cavity 15 of the elastomer 12. The photoresistor 23 senses the light environment, and its resistance value changes, which is expressed as an analog voltage signal. The AD conversion chip 22 can sample and convert the analog voltage signal into digital signal, and output the corresponding digital value as a photosensitive signal, which is convenient for subsequent acquisition and processing by the control module 3.

[0043] Here, the specific configuration of the circuit board 21, the AD conversion chip 22 and the photoresistor 23 is a conventional technique in this field and will not be described in detail here.

[0044] The photosensitive detection module 2 thus formed is located inside the light-proof, closed cavity 15 in the initial state of the sealed connection of the housing 1. When the housing 1 is disassembled, it sensitively detects the lighting environment and generates a photosensitive signal, which is convenient for the subsequent acquisition and processing by the control module 3.

[0045] Combination Figure 6 Furthermore, the control module 3 includes a processing unit 31, a communication unit 32, and a power supply unit 33. The processing unit 31 communicates with the photosensitive detection module 2 through the communication unit 32. The power supply unit 33 provides power to the control module 3 and the photosensitive detection module 2. At the same time, the power supply unit 33 also integrates a memory 331, which can continuously store the processing data of the processing unit 31 and record the disassembly event of the housing 1.

[0046] Specifically, the processing unit 31 can generate a photosensitive threshold based on the initial photosensitive signal of the photosensitive detection module 2 in a dark environment when the housing 1 is initially sealed and connected.

[0047] As an example, in the initial state of the sealed connection of the housing 1, the processing unit 31 continuously reads the digital value output by the AD conversion chip 22 and calculates the resistance value of the photoresistor 23 according to the voltage divider circuit parameters, thereby continuously acquiring the resistance value of the photoresistor 23 (for example, continuously acquiring 100 times). Preferably, the acquisition interval is 50ms. After removing the maximum and minimum values ​​of the acquisition results, the average resistance value is calculated and the average resistance value is used as the reference dark resistance value R0.

[0048] Meanwhile, the memory 331 of the power supply unit 33 stores the reference dark resistance value R0.

[0049] Further, the processing unit 31 calculates the reference dark resistance value R0 to set the photosensitivity threshold Rth, specifically as follows: Setting the photosensitive threshold to 50% of the reference dark resistance value can effectively avoid misjudgment caused by slight fluctuations in resistance value due to factors such as changes in ambient temperature, device aging, and weak electromagnetic interference. At the same time, it can also ensure that when the housing 1 is disassembled and a gap appears, allowing a small amount of light to enter, the resistance value of the photoresistor 23 will decrease significantly and be reliably identified, thereby improving detection sensitivity and anti-interference ability, and making the anti-tamper judgment more stable and accurate.

[0050] Therefore, the processing unit 31 can compare the subsequently acquired photosensitive signal with the photosensitive threshold. When the signal is less than the photosensitive threshold, it determines that the housing 1 has been disassembled and opened, thereby generating an alarm signal.

[0051] To ensure the reliability of the anti-tamper detection, the processing module 31 is also equipped with continuous acquisition confirmation logic. Only when the photosensitive signal is continuously acquired below the photosensitive threshold and the preset continuous acquisition conditions are met will it be determined that the housing 1 has been disassembled and opened, and an alarm signal will be generated.

[0052] As an example, the preset continuous acquisition condition is to acquire photosensitive signals three times in a row. When the photosensitive signals acquired by the processing module 31 three times in a row are all below the photosensitive threshold, it is determined that the shell 1 has been disassembled and opened, and an alarm signal is generated. This can effectively prevent false judgments and improve detection sensitivity and reliability.

[0053] Meanwhile, the memory 331 of the power supply unit 33 stores the disassembly event of the housing 1, including the time when the housing 1 was disassembled, the resistance value, etc., for subsequent monitoring.

[0054] Here, the specific configuration of the processing module 31, the communication unit 32 and the power supply unit 33 is a conventional technical means in this field, and will not be described in detail here.

[0055] Therefore, the control module 3 can cooperate with the photosensitive detection module 2 to generate a photosensitive threshold based on the initial photosensitive signal of the photosensitive detection module 2 in the dark environment when the housing 1 is initially sealed. At the same time, when the housing 1 is disassembled, the resistance value of the photosensitive detection module 2 changes, generating a photosensitive signal. The control module 3 can compare the photosensitive signal with the photosensitive threshold to generate an alarm signal, so as to realize a dual anti-tamper system that combines physical protection and photosensitive detection, thereby improving the stability and reliability of anti-tamper detection.

[0056] Furthermore, unlike existing anti-tampering schemes that rely on physical damage (such as damaging the chip structure) or disposable components (such as fragile electronic tags), after the housing 1 is disassembled, it is only necessary to reseal and reconnect the ball head 11, the elastomer 12, the support 13 and the base 14 to re-form a closed light-shielding cavity 15 inside the elastomer 12, thus providing a light-free environment for the photosensitive detection module 2 again. The entire reset process does not require the replacement of any parts, and the housing 1 can resume operation. This reduces maintenance costs, avoids material waste, and allows for long-term repeated use.

[0057] This constitutes the tamper-proof detection device for the anti-cheating weighing sensor provided by the present invention.

[0058] This invention also provides a tamper-proof detection method for an anti-cheating weighing sensor. Based on the tamper-proof detection device for an anti-cheating weighing sensor constructed by the above scheme, this tamper-proof detection method includes: Combination Figure 7 During the power-on initialization phase, the housing 1 is in a sealed connection initial state. The power supply unit 33 provides working power to the control module 3 and the photosensitive detection module 2. The processing unit 31 collects the initial photosensitive signal of the photosensitive detection module 2 in the initial state and calculates and processes the initial photosensitive signal to generate a photosensitive threshold. The memory 331 of the power supply unit 33 stores the photosensitive threshold.

[0059] After the weighing sensor enters normal working state, the photosensitive detection module 2 senses the light environment inside the housing 1 in real time inside the closed light-shielding cavity 15 and generates a photosensitive signal. At the same time, the control module 3 periodically collects the photosensitive signal generated by the photosensitive detection module 2, reads the digital value output by the AD conversion chip 22, and calculates the real-time resistance value of the photoresistor 23 according to the voltage divider circuit parameters.

[0060] Furthermore, the control module 3 compares the real-time resistance value of the photosensitive signal with the preset photosensitive threshold. If the control module 3 continuously collects the photosensitive signal below the photosensitive threshold and meets the preset continuous collection conditions, the control module 3 determines that the housing 1 has been disassembled and opened, generates an alarm signal, and at the same time, the memory 331 of the power supply unit 33 stores the disassembly event of the housing 1.

[0061] Next, the housing 1 is reset, and the ball head 11, elastomer 12, support 13 and base 14 are resealed and connected to provide a light-free environment for the photosensitive detection module 2. The entire reset process does not require the replacement of any parts.

[0062] Meanwhile, the resistance value of the photosensitive detection module 2 changes in the absence of light. The control module 1, in the initial state of the housing 1 being sealed and connected, collects the initial photosensitive signal of the photosensitive detection module 2 and calculates and processes the initial photosensitive signal to generate a new photosensitive threshold. The memory 331 of the power supply unit 33 stores the new photosensitive threshold.

[0063] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A tamper-evident detection device for a tamper-evident load cell, comprising a housing of the load cell, characterised in that, It also includes a photosensitive detection module and a control module. The housing includes a ball head, an elastomer, a support, and a base. The elastomer and the ball head form a first anti-tamper connection structure, and the bottom of the base forms a second anti-tamper connection structure. The elastomer is sealed to the ball head and the support respectively, and a closed light-shielding cavity is formed inside the elastomer. The photosensitive detection module is located inside the closed light-shielding cavity and can sense the light environment inside the housing and generate a photosensitive signal. The control module can collect the photosensitive signal and compare it with a preset photosensitive threshold to generate an alarm signal.

2. The tamper-evident detection device of a load cell against fraud according to claim 1, characterized in that, The top surface of the elastomer has a mounting groove for engaging with the ball head, and mounting holes are formed in the mounting groove. The bottom surface of the base also has mounting holes for fixing the housing, and the mounting holes are configured as conical countersunk holes.

3. The tamper-evident detection device of a load cell against fraud according to claim 2, characterized in that, The bottom of the base is also provided with anti-tamper screws for engaging with the mounting holes. The head of the anti-tamper screw is accommodated in the mounting hole, and the top surface has an anti-tamper groove.

4. The tamper-evident weight sensor anti-tamper detection apparatus of claim 1, wherein, The photosensitive detection module includes a circuit board, an AD conversion chip, and a photoresistor. The AD conversion chip and the photoresistor are integrated on the circuit board, and the photosensitive surface of the photoresistor faces the seam of the housing.

5. The tamper-evident weight sensor anti-tamper detection apparatus of claim 4, wherein, A light shield is formed inside the elastomer. The bottom of the light shield is sealed to the circuit board and covers the photosensitive surface of the photoresistor.

6. The tamper-evident weight sensor anti-tamper detection apparatus of claim 5, wherein, The inner surface of the light shield is also provided with a matte texture.

7. The tamper-evident weight sensor anti-tamper detection apparatus of claim 4, wherein, The control module can continuously acquire the resistance value of the photoresistor in the initial state and calculate the average resistance value to generate a reference dark resistance value.

8. The tamper-evident detection device of a load cell against fraud according to claim 7, characterized in that, The control module can also calculate and process the reference dark resistance value to set the photosensitive threshold.

9. The tamper-evident detection device of a load cell against fraud according to claim 8, characterized in that, The control module is equipped with continuous acquisition confirmation logic, which generates an alarm signal when the continuously acquired photosensitive signal is lower than the photosensitive threshold and the preset continuous acquisition conditions are met.

10. A method for tamper-proof detection of a cheating weighing sensor, characterized in that, The tamper-proof detection device for the anti-cheating weighing sensor according to any one of claims 1-9, wherein the tamper-proof detection method includes: The control module acquires the initial photosensitive signal from the photosensitive detection module in the initial state of the sealed connection of the housing, and calculates and processes the initial photosensitive signal to generate a photosensitive threshold. The photosensitive detection module senses the lighting environment inside the housing in real time within the sealed, light-shielding cavity and generates a photosensitive signal. The control module collects the photosensitive signal and compares it with a preset photosensitive threshold. If the control module determines that the housing has been disassembled, it generates an alarm signal. The housing is reset and sealed. The control module re-acquires the initial photosensitive signal from the photosensitive detection module and calculates and processes the initial photosensitive signal to update the photosensitive threshold.

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