Tamperproof alarm detection for multimode bridge machine

Abstract

The application relates to a detection device for anti-disassembly alarm of a multi-mode bridge machine, which replaces complicated manual operation by arranging a special pressing device, realizes standardized triggering of the anti-disassembly alarm function, and effectively improves test efficiency and consistency of results. Meanwhile, the scheme can independently verify the alarm logic under the condition of suppressing physical alarm output such as a buzzer by introducing a silent test state, which not only eliminates the noise interference problem in the batch test scene, optimizes the working environment, but also provides a more flexible and in-depth test mode, and improves the comprehensiveness and accuracy of detection.

Description

Technical Field

[0001] This application relates to the field of electronic equipment testing technology, and in particular to a detection device for an anti-tamper alarm of a multi-mode bridging machine. Background Technology

[0002] In existing technologies, multimode bridges typically have an anti-tamper alarm device on their housing to ensure the integrity of their internal circuits and data security. This device generally includes a mechanical switch electrically connected to the device's motherboard. When the housing is properly installed, the housing applies pressure to the mechanical switch to keep it in a safe state. Once the housing is disassembled without authorization, the pressure on the switch disappears, the switch state changes, and the motherboard is triggered to execute preset alarm logic, such as emitting a buzzer, illuminating a warning light, or reporting an alarm message to the network management center.

[0003] Testing the effectiveness of tamper alarm functions is a necessary procedure in the production, quality inspection, and maintenance of the aforementioned equipment. However, current testing methods for such tamper alarm functions primarily rely on manual or semi-manual operation. Testers typically need to use their fingers or simple tools to directly press or release the spring switch of the tamper alarm device to simulate the installation and removal of the casing. This significantly increases labor and time costs during large-scale testing. Furthermore, the consistency of pressure and duration during manual pressing is difficult to guarantee, potentially leading to deviations in test results and affecting the reliability of the test. Utility Model Content

[0004] To address the aforementioned issues, this application provides a detection device for tamper alarms of multimode bridging machines with high testing efficiency.

[0005] To achieve the above objectives, in a first aspect, embodiments of this application provide a detection device for an anti-tamper alarm of a multimode bridging machine, comprising: The main housing is adapted to support the multimode bridge machine to be tested; A pressing device is movably mounted on the main housing for applying or releasing mechanical pressure to the anti-tamper alarm device of the multi-mode bridging machine; A data processing unit, disposed within the main housing, comprises: A signal interface for establishing an electrical connection with the multimode bridge; The control circuit is electrically connected to the signal interface and the state switching component described below; A state switching component is used to output a mode selection signal to the control circuit; The control circuit has at least two hardware operating states that can be switched according to the mode selection signal: First working state: When the control circuit is in this state, a complete signal path is formed inside, so that the anti-tamper alarm signal triggered by the pressing device can pass through the signal interface, thereby triggering the multi-mode bridge to generate an alarm output; Second operating state: When the control circuit is in this state, the signal path used to trigger the alarm output is blocked, but the control circuit can still receive and process the tamper alarm signal through the signal interface for testing and confirmation.

[0006] Preferably, the pressing device includes a pressing block that is slidably mounted on the main housing along a preset guide rail.

[0007] Preferably, the guide rail is formed on a cantilever structure, and the cantilever structure extends above a test position for placing the multimode bridging machine; a groove is provided on the pressing block, the groove slides in cooperation with the guide rail, and the cooperation structure between the groove and the guide rail can guide the pressing block to slide along the guide rail while restricting the pressing block from detaching in a direction perpendicular to the guide rail.

[0008] Preferably, the state switching component is a physical switch, the contacts of which are connected to the input terminal of the control circuit to change the level of the input terminal to generate the mode selection signal.

[0009] Preferably, the control circuit also has a third hardware operating state; when the control circuit is in this state, it does not respond to the tamper alarm signal.

[0010] Preferably, it further includes at least one status indicator light, which is connected to the data processing unit and is used to display the current working status of the detection device.

[0011] Secondly, embodiments of this application provide a method for detecting the tamper alarm of a multimode bridging machine, the method comprising the following steps: A detection device for tamper alarm of a multimode bridge machine as described in any embodiment of the first aspect is provided, and the detection device is electrically connected to the multimode bridge machine under test; The tamper alarm device of the multimode bridging machine is triggered by pressing the detection device. Operate the state switching component of the detection device to put the anti-tamper alarm device of the multi-mode bridge machine into a silent test state; In the silent test state, it was verified that the anti-tamper alarm logic of the multi-mode bridge was triggered normally, and it was confirmed that the alarm output of the multi-mode bridge was suppressed.

[0012] Preferably, before triggering the tamper alarm device, it further includes: Perform a pairing operation to establish a communication link between the detection device and the multimode bridge.

[0013] Preferably, the method further includes: After the test is completed in the silent test state, operate the state switching component again to make the anti-tamper alarm device exit the silent test state and enter the alarm state or the off state.

[0014] The tamper alarm detection device for the multimode bridging machine designed in this application replaces cumbersome manual operation with a dedicated pressing device, achieving standardized triggering of the tamper alarm function and effectively improving testing efficiency and result consistency. Simultaneously, by introducing a silent testing state, this solution can independently verify the alarm logic while suppressing physical alarm outputs such as buzzers. This not only eliminates noise interference problems in batch testing scenarios and optimizes the working environment but also provides a more flexible and in-depth testing mode, improving the comprehensiveness and accuracy of the detection. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the detection device in one embodiment of this application.

[0016] Figure 2 yes Figure 1 Front view.

[0017] Figure 3 yes Figure 1 Enlarged diagram of point A in the middle.

[0018] Figure 4 This is a circuit diagram of the control circuit of the detection device in one embodiment of this application.

[0019] Figure 5 This is a circuit schematic diagram of a specific implementation of the signal interface module of the detection device in one embodiment of this application.

[0020] The components include: main housing 10, pressing device 20, guide rail 21, pressing block 22, data processing unit 30, signal interface 31, control circuit 32, status switching component 33, status indicator light 40, multi-mode bridging machine 100, and anti-tamper alarm device 101. Detailed Implementation

[0021] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0022] Firstly, embodiments of this application provide a detection device for an anti-tamper alarm of a multimode bridging machine 100. Please refer to the appendix. Figure 1 , Figure 2and Figure 3 This application provides a detection device for the tamper alarm of a multimode bridging machine 100. The device mainly includes a main housing 10, a pressing device 20, a data processing unit 30, and an optional status indicator light 40.

[0023] Specifically, such as Figure 1 As shown, the main housing 10 serves as the base of the entire testing device and is typically made of insulating engineering plastic or metal with sufficient structural strength. The upper surface of the main housing 10 has a test position or bearing area for stably placing the multimode bridging machine 100 under test. This test position can be equipped with a corresponding positioning structure, such as a positioning post or groove, according to the bottom contour of the multimode bridging machine 100, to ensure that the position of the multimode bridging machine 100 is fixed during each test, thereby ensuring that the pressing device 20 can accurately act on its anti-tamper alarm device 101.

[0024] In this embodiment, as Figure 3 As shown, the tamper alarm device 101 in the multimode bridging machine 100 typically manifests as a flexible conductive spring. When the multimode bridging machine 100 housing is normally installed, a specific structure of the housing will press the spring 101, causing it to disconnect (or connect, depending on the circuit design) from another contact on the main board. At this time, the multimode bridging machine 100 is in a safe state. When the housing is removed, the pressure on the spring 101 disappears, and it resets under its own elastic force, connecting (or disconnecting) from the other contact. This change in level or on / off state is the tamper alarm signal, which triggers the main board to execute alarm logic. In this embodiment, the pressing block 22 simulates the pressure and release of the housing on the spring 101.

[0025] The pressing device 20 is movably disposed on the main housing 10 and is used to apply or release mechanical pressure to the anti-tamper alarm device 101 of the multimode bridging machine 100 to simulate the disassembly and installation of the housing of the multimode bridging machine 100. In this embodiment, the pressing device 20 is a mechanical sliding assembly, which includes a guide rail 21 and a pressing block 22. The guide rail 21 is preferably integrally formed on a cantilever structure extending from the side wall of the main housing 10, the cantilever structure spanning above the test position, and the pressing block 22 is slidably mounted on the guide rail 21. To achieve stable sliding and prevent the pressing block 22 from falling off, the cross-section of the guide rail 21 can be designed as an I-shape or a dovetail shape, and a corresponding groove is opened on the pressing block 22. The matching structure of the groove and the guide rail 21 can guide the pressing block 22 to slide along the guide rail 21 while restricting the pressing block 22 from falling off in the direction perpendicular to the guide rail 21. In this way, when the operator pushes or pulls the pressing block 22 along the guide rail 21, its bottom end can accurately apply pressure or release pressure to the anti-tamper alarm device 101 of the multi-mode bridging machine 100 located below it.

[0026] The data processing unit 30 is typically materialized as a printed circuit board (PCB) mounted inside the main housing 10, which includes a signal interface 31, a control circuit 32, and a state switching component 33.

[0027] Please see Figure 4 The core of the control circuit 32 can be a microcontroller (MCU), such as the U7 of the STM32F207VCT6. This microcontroller U7 uses multiple general purpose input / output (GPIO) pins to implement logic control of the entire detection device. For example, signal lines named ALARM_MODE and SILENCE_MODE are connected to specific pins of the microcontroller U7, and these signal lines are connected to an external physical switch, namely the state switching component 33. When the tester operates this physical switch, the input level of the corresponding pin changes, and the microcontroller U7 receives the mode selection signal accordingly.

[0028] The signal interface 31 is used to establish a communication and control connection between the control circuit 32 and the multimode bridge under test 100, so as to receive instructions from the state switching component 33 and send corresponding control commands to the multimode bridge 100 accordingly. In a preferred embodiment, the signal interface 31 is a Universal Serial Bus (USB) female connector, which can be connected to the USB interface of the multimode bridge 100 through a USB data cable.

[0029] Please refer to further information. Figure 5 To enhance the versatility of signal interface 31, it integrates one RS232 interface and one RS485 interface. The logic level signal output by controller U7 is sent to level conversion chip U1, converted into a standard RS232 signal, and then output through connector J2. Simultaneously, another set of logic signals is sent to level conversion chip U2, converted into a more robust RS485 differential signal output. This design allows the testing device to be compatible with various devices under test employing different serial communication protocols.

[0030] The state switching component 33 is a human-machine interface used to allow testers to select the detection mode. In this embodiment, the state switching component 33 is a physical switch, such as a three-position toggle switch or a cycle switch button. The contacts of the physical switch are connected to the input terminal of the control circuit 32 to change the level of the input terminal to generate the mode selection signal.

[0031] The core function of this detection device is that its control circuit 32, after receiving the mode selection signal output from the state switching component 33, can enter different hardware operating states and send specific instructions to the multi-mode bridge 100 through the signal interface 31 to control its response to alarm signals. First operating state (alarm mode): When the state switching component 33 is placed in this mode, the control circuit 32 sends a normal test command to the multimode bridge 100 or does not send a special command. At this time, a complete signal path is formed inside the detection device. When the operator moves the pressing block 22 to release the reed 101, the multimode bridge 100 will execute its preset alarm logic completely and generate a physical alarm output, such as a buzzer sounding, just as in actual applications, to verify the complete alarm function.

[0032] Second working state (silent test mode): When the state switching component 33 is placed in this mode, the firmware of the multimode bridge 100 will decouple its alarm logic from the physical alarm output unit, such as the buzzer drive circuit. At this time, when the pressing block 22 releases the spring 101, the main board of the multimode bridge 100 will still execute the complete alarm logic, such as logging and reporting to the network management system. However, the signal path used to trigger physical alarms such as buzzers will be blocked by software or hardware logic. At the same time, the multimode bridge 100 can send the status information of the alarm logic being triggered back to the control circuit 32 for test confirmation to solve the test noise problem.

[0033] The third hardware operating state (off mode): In this mode, the control circuit 32 can disable the alarm function of the multimode bridge 100, or it can stop processing any alarm signals from the bridge itself. This is for equipment debugging or other unrelated tests.

[0034] In some embodiments, such as Figure 1 As shown, to provide more intuitive feedback on the test status, the testing device may also include one or more status indicator lights 40, such as LEDs. For example, a green LED can be used to indicate the USB connection status, a blue LED to indicate that it is currently in silent test mode, and a red LED to flash when triggered in alarm mode. These indicator lights 40 are all driven by the control circuit 32.

[0035] Secondly, based on the aforementioned detection device, this application also provides a method for detecting the tamper alarm of a multimode bridging machine 100. The following is an example of a complete test procedure: Step S1: The tester places the multimode bridge 100 under test on the test position of the main housing 10 of the testing device. Then, a USB data cable is used to connect the signal interface 31 of the testing device to the data interface of the multimode bridge 100. At this time, the control circuit 32 of the device establishes an electrical connection and communication link with the multimode bridge 100. Optionally, a pairing operation can be performed before the formal test, such as pressing a pairing button on the device (not shown), to ensure that the control protocol handshake between the two is successful. After successful connection, the green LED in the status indicator 40 can be lit.

[0036] Step S2: The tester selects the working mode by operating the status switching component 33 according to the test requirements.

[0037] To perform a silent test, switch the state switching component 33 to the second working state. At this time, the blue LED light will illuminate. Then, the tester pushes the pressing block 22 forward so that its bottom end presses against the spring 101 of the multimode bridging machine 100; then pulls the pressing block 22 backward to release the spring 101, thereby triggering the anti-tamper alarm.

[0038] Step S3: In silent test mode, the tester needs to verify whether the alarm function is normal through other means. For example, observe whether the red LED indicator driven by the control circuit 32 on the detection device is flashing. This indicates that the control circuit 32 has received confirmation information from the bridge unit 100 that the alarm logic has been triggered. Alternatively, the tester can confirm that the alarm log has been generated or the alarm information has been reported by connecting to the background management interface of the multimode bridge unit 100 and checking the log server. During this process, the test site will remain quiet, and there will be no alarm beeping.

[0039] Step S4: After completing the silent test, the tester can operate the state switching component 33 again, for example, switch it to the first working state (alarm mode), and then repeat the pushing and pulling action of the pressing block 22. At this time, a clear alarm sound should be heard from the multi-mode bridging machine 100, thus verifying that its physical alarm output function is also intact. After the test is completed, the state switching component 33 can be turned off, and then the product under test can be removed for the next round of testing.

[0040] The tamper alarm detection device for multimode bridging machines provided in this application replaces cumbersome manual operation with a dedicated pressing device, achieving standardized triggering of the tamper alarm function and effectively improving testing efficiency and result consistency. Simultaneously, by introducing a silent testing state, this solution can independently verify the alarm logic while suppressing physical alarm outputs such as buzzers. This not only eliminates noise interference in batch testing scenarios and optimizes the working environment but also provides a more flexible and in-depth testing mode, improving the comprehensiveness and accuracy of the detection.

[0041] In the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A detection device for tamper alarm of a multimode bridging machine, characterized in that, include: The main housing is adapted to support the multimode bridge machine to be tested; A pressing device is movably mounted on the main housing for applying or releasing mechanical pressure to the anti-tamper alarm device of the multi-mode bridging machine; A data processing unit, disposed within the main housing, comprises: A signal interface for establishing an electrical connection with the multimode bridge; The control circuit is electrically connected to the signal interface and the state switching component described below; A state switching component is used to output a mode selection signal to the control circuit; The control circuit has at least two hardware operating states that can be switched according to the mode selection signal: First working state: When the control circuit is in this state, a complete signal path is formed inside, so that the anti-tamper alarm signal triggered by the pressing device can pass through the signal interface, thereby triggering the multi-mode bridge to generate an alarm output; Second operating state: When the control circuit is in this state, the signal path used to trigger the alarm output is blocked, but the control circuit can still receive and process the tamper alarm signal through the signal interface for testing and confirmation.

2. The detection device for the anti-tamper alarm of the multi-mode bridging machine according to claim 1, characterized in that, The pressing device includes a pressing block that is slidably mounted on the main housing along a preset guide rail.

3. The detection device for the tamper alarm of the multimode bridging machine according to claim 2, characterized in that, The guide rail is formed on a cantilever structure, and the cantilever structure extends above a test position for placing the multimode bridging machine; a groove is provided on the pressing block, the groove slides in conjunction with the guide rail, and the mating structure of the groove and the guide rail can guide the pressing block to slide along the guide rail while restricting the pressing block from detaching in a direction perpendicular to the guide rail.

4. The detection device for the anti-tamper alarm of the multi-mode bridging machine according to claim 1, characterized in that, The state switching component is a physical switch, the contacts of which are connected to the input terminal of the control circuit to change the level of the input terminal to generate the mode selection signal.

5. The detection device for the tamper alarm of the multimode bridging machine according to claim 1, characterized in that, The control circuit also has a third hardware operating state; when the control circuit is in this state, it does not respond to the tamper alarm signal.

6. The detection device for the anti-tamper alarm of the multi-mode bridging machine according to claim 1, characterized in that, It also includes at least one status indicator light, which is connected to the data processing unit and is used to display the current working status of the detection device.

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