Analog multiplexing detection circuit for destroying signals in biological recognition module

Abstract

The utility model discloses an analog multiplexing detection circuit for destroying signals in a biological recognition module. Independent monitoring and management of double devices by a single interface are realized through a sinking plate type-C interface. According to the circuit, a 24-line signal path of the Type-C interface is divided into two independent detection circuits, and each detection circuit comprises a program programming path and a signal destroying path. The program programming path provides a redundancy debugging interface through the USB to serial port chip, and the program updating process is simplified; the destruction signal path realizes concrete display of the destruction signal without triggering the actual destruction action through the step-down power supply chip and the single-pole double-throw voltage selection switch. The LED lamp integrated on the substrate is used for monitoring the stability of the power supply, and the destroying signal indicating lamp is used for indicating the validity of destroying signals. Besides, the circuit is provided with a software part used for managing and controlling the detection function, the destroying signal state is visually displayed through a destroying signal indicating lamp, and the problem that destroying signals in an existing reinforced panel are difficult to verify is solved.

Description

Technical Field

[0001] This utility model relates to the field of data security technology, and in particular to an analog multiplexing detection circuit for destroying signals in a biometric module. Background Technology

[0002] In modern ruggedized tablets, some special-purpose devices require the consideration of destroying critical components under necessary conditions. While software destruction can be achieved by reprogramming, physical testing of hardware destruction would inevitably lead to incalculable cost losses.

[0003] Verifying the integrity and validity of a destruction signal is a challenge in existing technologies. Existing ruggedized flat panels suffer from difficulties in determining the integrity of the destruction signal and verifying its completeness. To reduce testing costs and improve verification efficiency, it is particularly important to develop a test substrate that visualizes the destruction signal without performing the actual destruction action, by leading out an interface through a detection circuit to form a loop. Utility Model Content

[0004] The purpose of this invention is to provide an analog multiplexing detection circuit for destroying signals in a biometric module, thereby solving the problems mentioned above in the background technology.

[0005] This utility model is achieved through the following technical solution:

[0006] An analog multiplexing detection circuit for destruction signals in a biometric module includes a recessed Type-C interface. The recessed Type-C interface is disposed on a substrate and has 24 signal paths. The 24 signal paths are divided into two identical detection circuits for input and output. The two detection circuits can operate independently. Each detection circuit is equipped with an LED for monitoring power stability and a destruction signal indicator for monitoring the integrity of the destruction signal.

[0007] Furthermore,

[0008] Each detection circuit includes a program writing path and a destruction signal path.

[0009] Furthermore,

[0010] The program writing path includes a USB to serial port chip and a program writing interface. The receiving end of the USB to serial port chip is connected to the output end of the Type-C interface and receives the output control signal and USB signal, and is connected to the program writing port.

[0011] Furthermore,

[0012] The destruction signal path includes a step-down power supply chip, a single-pole double-throw (SPDT) voltage selection switch, and a destruction signal indicator. The step-down power supply chip is directly connected to a Type-C interface and powered by the Type-C interface. The output of the step-down power supply chip is connected to one switch of the SPDT voltage selection switch, which is then connected to the destruction signal indicator. The Type-C interface is also directly connected to the other switch of the SPDT voltage selection switch, enabling the SPDT voltage selection switch to select the voltage. The destruction signal indicator is also directly connected to the Type-C interface and directly receives the destruction signal.

[0013] Furthermore,

[0014] The step-down power supply chip is a 5V to 3.3V power supply chip.

[0015] Furthermore,

[0016] The destruction signal indicator is directly powered by Type-C and output through a power chip and connected in series to the low-potential active destruction signal. When the destruction signal is active, the corresponding destruction signal indicator is constantly lit.

[0017] The beneficial effects of this utility model are:

[0018] 1. By dividing the 24-wire signal path of the Type-C interface into two independent detection circuits, a single Type-C interface can be used to connect two devices simultaneously and monitor their status, improving monitoring efficiency and making it suitable for scenarios that require simultaneous management of multiple devices.

[0019] 2. The destruction signal forms a loop through the detection circuit, simulating the destruction signal without triggering an actual destruction action. This avoids damage to the hardware due to accidental operation, and the status of the destruction signal is clearly displayed by the on / off state of the destruction signal indicator light, facilitating debugging and monitoring. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0023] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model 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 utility model.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" 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 utility model based on the specific circumstances.

[0025] See the example. Figure 1 :

[0026] An analog multiplexing detection circuit for destruction signals in a biometric module includes a recessed Type-C interface. The recessed Type-C interface is disposed on a substrate and has 24 signal paths. The 24 signal paths are divided into two identical detection circuits for input and output. The two detection circuits can operate independently. Each detection circuit is equipped with an LED for monitoring power stability and a destruction signal indicator for monitoring the integrity of the destruction signal.

[0027] By splitting the 24-wire signal path of the Type-C interface into two paths and connecting them to two detection circuits respectively, it is possible to connect two devices simultaneously with a single Type-C interface and monitor their status.

[0028] Furthermore,

[0029] Each detection circuit includes a program writing path and a destruction signal path.

[0030] Dividing the detection circuit into a program writing path and a destruction signal path allows for independent detection and management of the program writing and destruction signals for the biometric module. This design improves the modularity of the circuit and facilitates debugging and maintenance.

[0031] The detection circuit updates the module's program via the program writing path, while simultaneously monitoring the validity of the destruction signal via the destruction signal path. When a program update is required, the program writing path can operate independently, while the destruction signal path remains under monitoring.

[0032] Furthermore,

[0033] The program writing path includes a USB to serial port chip and a program writing interface. The receiving end of the USB to serial port chip is connected to the output end of the Type-C interface and receives the output control signal and USB signal, and is connected to the program writing port.

[0034] USB-to-serial chips provide redundant debugging interfaces, offering additional connection options for external debugging tools, increasing flexibility and maintainability, allowing program burning via USB interface, and simplifying the debugging process.

[0035] By using a USB-to-serial chip to transmit control signals and USB signals to the programming interface, the module's program can be updated, avoiding the complexity of directly operating the hardware and improving debugging efficiency.

[0036] Furthermore,

[0037] The destruction signal path includes a step-down power supply chip, a single-pole double-throw (SPDT) voltage selection switch, and a destruction signal indicator. The step-down power supply chip is directly connected to a Type-C interface and powered by the Type-C interface. The output of the step-down power supply chip is connected to one switch of the SPDT voltage selection switch, which is then connected to the destruction signal indicator. The Type-C interface is also directly connected to the other switch of the SPDT voltage selection switch, enabling the SPDT voltage selection switch to select the voltage. The destruction signal indicator is also directly connected to the Type-C interface and directly receives the destruction signal.

[0038] The destruction signal indicator light serves as a visual indicator of the integrity of the destruction signal. The destruction signal indicator light is powered by a Type-C interface, with its voltage being 5V and the output of a 5V to 3.3V power supply chip connected in series to the low-potential active destruction signal. When the destruction signal is active, the corresponding destruction signal indicator light is constantly lit. The presence or absence of the destruction signal and the continuity of the destruction signal are indicated by the on and off states of the destruction signal indicator light, thus visualizing the destruction signal without performing the destruction action.

[0039] In a biometric module, the destruction signal path converts 5V to 3.3V via a step-down power supply chip to power the destruction signal indicator light. A single-pole double-throw voltage selector switch can switch the voltage source to ensure the indicator light functions correctly under different voltages. When the destruction signal is valid, the destruction signal indicator light remains constantly lit, visually displaying the signal status without triggering an actual destruction action.

[0040] Furthermore,

[0041] The step-down power supply chip is a 5V to 3.3V power supply chip.

[0042] The step-down power chip is a 5V to 3.3V power chip that can reduce the voltage to ensure the stable operation of each component and achieve low power consumption of the entire circuit.

[0043] The low power consumption of the entire circuit ensures that it can operate stably for a long time.

[0044] Furthermore,

[0045] The destruction signal indicator is directly powered by Type-C and output through a power chip and connected in series to the low-potential active destruction signal. When the destruction signal is active, the corresponding destruction signal indicator is constantly lit.

[0046] This visualizes the destruction signal without triggering an actual destruction action, thus avoiding damage to the hardware due to accidental operation.

[0047] The method of using this utility model is as follows:

[0048] The 24-wire signal path of the recessed Type-C interface divides the signal into two independent and identical detection circuits. Both independent detection circuits include detection for program writing and destruction signals. After receiving external signals, the Type-C interface splits them into two paths that enter two independent monitoring circuits. Each detection circuit includes a program writing path and a destruction signal path.

[0049] The program writing path transmits control signals and USB signals to the program writing interface through a USB-to-serial chip for module program updates.

[0050] The destruction signal path powers the destruction signal indicator light via a step-down power supply chip (5V to 3.3V) and a single-pole double-throw voltage selector switch. When the destruction signal is valid, the indicator light remains constantly lit, visually displaying the signal status, but it does not trigger an actual destruction action. LEDs are used to monitor power supply stability, ensuring normal circuit operation. The entire circuit utilizes analog multiplexing to achieve a concrete representation of the destruction signal, while simultaneously supporting independent operations for program writing and signal monitoring, improving debugging efficiency and system stability.

[0051] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An analog multiplexing detection circuit for destroying signals in a biometric module, comprising a recessed Type-C interface, characterized in that, The recessed Type-C interface is mounted on the substrate and has 24 signal paths. These 24 signal paths are divided into two identical detection circuits for input and output. The two detection circuits can operate independently. Each detection circuit is equipped with an LED for monitoring power stability and a destruction signal indicator for monitoring the integrity of the destruction signal.

2. The analog multiplexing detection circuit for destroying signals in a biometric module according to claim 1, characterized in that, Each detection circuit includes a program writing path and a destruction signal path.

3. The analog multiplexing detection circuit for destroying signals in a biometric module according to claim 2, characterized in that, The program writing path includes a USB to serial port chip and a program writing interface. The receiving end of the USB to serial port chip is connected to the output end of the Type-C interface and receives the output control signal and USB signal, and is connected to the program writing port.

4. The analog multiplexing detection circuit for destroying signals in a biometric module according to claim 2, characterized in that, The destruction signal path includes a step-down power supply chip, a single-pole double-throw (SPDT) voltage selection switch, and a destruction signal indicator. The step-down power supply chip is directly connected to a Type-C interface and powered by the Type-C interface. The output of the step-down power supply chip is connected to one switch of the SPDT voltage selection switch, which is then connected to the destruction signal indicator. The Type-C interface is also directly connected to the other switch of the SPDT voltage selection switch, enabling the SPDT voltage selection switch to select the voltage. The destruction signal indicator is also directly connected to the Type-C interface and directly receives the destruction signal.

5. The analog multiplexing detection circuit for destroying signals in a biometric module according to claim 4, characterized in that, The step-down power supply chip is a 5V to 3.3V power supply chip.

6. The analog multiplexing detection circuit for destroying signals in a biometric module according to claim 5, characterized in that, The destruction signal indicator is directly powered by Type-C and output through a power chip and connected in series to the low-potential active destruction signal. When the destruction signal is active, the corresponding destruction signal indicator is constantly lit.

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