Anti-disassembly module and vehicle-mounted terminal

Abstract

The utility model discloses a kind of anti-disassembly module and vehicle terminal, applied to vehicle equipment technical field, to solve the reliability of poor problem of anti-disassembly module in prior art, specifically includes: contact type pressure detection module is used to detect component pressure to generate first level signal when anti-disassembly module is normally installed through fixed surface;When anti-disassembly module is disassembled, detection component pressure release generates second level signal;Control module is used to send the preset encrypted data to external timing module by communication module according to preset period;Control module is also used to generate disassembly alarm signal when receiving the second level signal output by contact type pressure detection module, and send to external timing module;Based on the cross verification of pressure trigger level signal and periodic encrypted data transmission constitutes physical layer and communication layer, eliminate single-point failure risk, improve the reliability and security of anti-disassembly device.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted equipment technology, and in particular to an anti-disassembly module and a vehicle-mounted terminal. Background Technology

[0002] With the continuous development of automotive electronics technology, in-vehicle terminal equipment is playing an increasingly important role in vehicle management, location tracking, and remote control. To prevent unauthorized disassembly or replacement of in-vehicle terminals, the most commonly used anti-disassembly solutions on the market currently include two main methods: industrial-grade RFID modules and software bonding.

[0003] Industrial-grade RFID modules typically use a strong adhesive layer on a PET substrate and employ a layered, nested structure for destructive identification. Alternatively, they may incorporate a miniature fracture sensor that triggers a self-destruct program to erase stored data when abnormal stress or displacement is detected, thus locking the vehicle terminal. While these modules rely on physical destruction for security, they have significant limitations: firstly, specialized tools can disassemble them without damaging the module; secondly, the complex in-vehicle environment necessitates the use of high-cost industrial-grade RFID modules to ensure stability, and the vehicle terminal requires an additional RFID reader, increasing hardware costs and integration complexity, hindering upgrades and adaptations of existing terminals. Software binding solutions bind unique identifiers such as the VIN (Vehicle Identification Number) to the terminal device. When the VIN cannot be read or the read VIN does not match the VIN stored in the terminal, a terminal locking mechanism is triggered. However, different vehicle manufacturers use varying communication protocol versions, making adaptation difficult. Furthermore, attackers can forge binding relationships by obtaining and copying relevant protocol information, bypassing the security mechanism. Additionally, many vehicle manufacturers do not provide VIN information, limiting the applicability of this solution.

[0004] In summary, existing anti-disassembly modules have certain deficiencies in terms of both physical protection and logical binding, resulting in poor overall reliability of the anti-disassembly function and making it difficult to meet the ever-increasing security requirements. Utility Model Content

[0005] This utility model provides an anti-disassembly module and a vehicle terminal to solve the problem of poor reliability of existing anti-disassembly modules.

[0006] The technical solution provided by this utility model embodiment is as follows:

[0007] On one hand, this utility model embodiment provides an anti-disassembly module, including: a shell, a control module, a communication module, and a contact pressure detection module; the fixing surface of the shell is fixedly connected to an external device;

[0008] The output of the contact pressure detection module is connected to the control module. The detection component of the contact pressure detection module is installed through the fixed surface of the housing. When the anti-tamper module is installed normally through the fixed surface, the detection component generates a first level signal when it is under pressure. When the anti-tamper module is disassembled, the pressure of the detection component is released, generating a second level signal.

[0009] The output of the control module is connected to the external timing module via the communication module; the control module is used to send preset encrypted data to the external timing module via the communication module according to a preset cycle; the control module is also used to generate a disassembly alarm signal when it receives the second level signal output by the contact pressure detection module, and send the disassembly alarm signal to the external timing module via the communication module.

[0010] The communication module is used to convert the format of encrypted data and disassembly alarm signals.

[0011] Optionally, the contact pressure detection module includes: at least one resettable limit switch;

[0012] The push rod of the reset type limit switch extends from the fixed surface of the housing. The moving contact of the reset type limit switch is connected to the input terminal of the control module, and the stationary contact of the reset type limit switch is connected to ground. The input terminal of the control module is also connected to the power supply via a pull-up resistor.

[0013] Optionally, the communication module includes: a first communication interface;

[0014] The input end of the first communication interface is connected to the output end of the control module, and the second end of the first communication interface is connected to the communication end of the external timing module.

[0015] The first communication interface is used to output encrypted data and disassembly alarm signals in accordance with the TTL communication protocol.

[0016] Optionally, the communication module further includes: at least one protocol conversion chip and at least one second communication interface; the protocol conversion chip and the second communication interface are configured in a one-to-one correspondence.

[0017] The input terminal of the protocol conversion chip is connected to the output terminal of the control module, and the output terminal of the protocol conversion chip is connected to the communication terminal of the external timing module via the second communication interface;

[0018] The protocol conversion chip is used to convert encrypted data and disassembly alarm signals into signal formats that conform to a preset communication protocol, and outputs the converted encrypted data and disassembly alarm signals to an external timing module through a second communication interface.

[0019] Optionally, the tamper-proof module may also include: a voltage conversion module;

[0020] The input terminal of the voltage conversion module is connected to an external power supply, and the output terminal of the voltage conversion module is connected to the power supply terminals of the control module and the communication module, respectively.

[0021] The voltage conversion module is used to convert the output voltage of the external power supply into the supply voltage, which then powers the control module and the communication module.

[0022] Optionally, the anti-tamper module also includes: a power supply adjustment module and a built-in power supply;

[0023] The detection terminal of the power supply adjustment module is connected to the input terminal of the voltage conversion module, the first input terminal of the power supply adjustment module is connected to the output terminal of the voltage conversion module, the second input terminal of the power supply adjustment module is connected to the output terminal of the built-in power supply, and the output terminal of the power supply adjustment module is connected to the power supply terminals of the control module and the communication module respectively.

[0024] The power supply adjustment module is used to supply power to the control module and communication module through the power supply voltage output by the voltage conversion module or the power supply voltage output by the built-in power supply.

[0025] Optionally, the power supply adjustment module includes: a switching module and a voltage monitoring module;

[0026] The input terminal of the voltage monitoring module is connected to the input terminal of the voltage conversion module, and the output terminal of the voltage monitoring module is connected to the control module.

[0027] The first input terminal of the switch module is connected to the output terminal of the voltage conversion module, the second input terminal of the switch module is connected to the output terminal of the built-in power supply, the output terminal of the switch module is connected to the power supply terminal of the control module and the power supply terminal of the communication module respectively, and the control terminal of the switch module is connected to the control module.

[0028] Optionally, the anti-tamper module may also include: an auxiliary detection module;

[0029] The auxiliary detection module is located inside the casing, and its output is connected to the control module.

[0030] The auxiliary detection module is used to detect the magnetic field strength at the installation position of the anti-tamper module. When the magnetic field strength is lower than the set threshold, it outputs a first level signal to the control module. When the magnetic field strength exceeds the set threshold, it outputs a second level signal to the control module.

[0031] The control module generates a disassembly alarm signal upon receiving the second-level signal output by the auxiliary detection module, and sends the disassembly alarm signal to the external timing module via the communication module.

[0032] Optionally, the auxiliary detection module includes: a switch-type Hall sensor;

[0033] The switch-type Hall sensor is located inside the housing, and its output is connected to the control module.

[0034] On the other hand, this utility model embodiment provides a vehicle terminal, including: the above-mentioned anti-disassembly module and timing module;

[0035] The input terminal of the anti-tamper module is connected to the vehicle battery, and the output terminal of the anti-tamper module is connected to the timing module; the fixing surface of the anti-tamper module's housing is fixedly connected to the plane inside the car.

[0036] The beneficial effects of this utility model embodiment are as follows:

[0037] In this embodiment of the invention, a contact pressure detection module directly senses changes in the pressure on the mounting surface based on the mechanical structure, thereby detecting physical disassembly and issuing disassembly alarms. The pressure-triggered level signal and periodically encrypted data transmission form a cross-verification between the physical and communication layers, eliminating the risk of single-point failure and improving the reliability and security of the anti-disassembly device. Upon disassembly, the contact pressure detection module immediately switches its output first-level signal to a second-level signal. When the control module detects the second-level signal, it immediately generates a disassembly alarm signal and sends it to the timing module, enabling the external timing module to be aware of illegal disassembly events immediately, thus improving the real-time performance of the anti-disassembly module.

[0038] Other features and advantages of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0039] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0040] Figure 1 This is a schematic diagram of the first structure of the anti-disassembly module in the embodiments of this utility model;

[0041] Figure 2 This is a schematic diagram of the second structure of the anti-disassembly module in this embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram of the external structure of the anti-disassembly module in an embodiment of this utility model;

[0043] Figure 4 This is a schematic diagram of a third structure of the anti-disassembly module in this utility model embodiment;

[0044] Figure 5 This is a schematic diagram of the fourth structure of the anti-disassembly module in this utility model embodiment;

[0045] Figure 6 This is a schematic diagram of the fifth structure of the anti-disassembly module in this utility model embodiment;

[0046] Figure 7 This is a schematic diagram of the sixth structure of the anti-disassembly module in the embodiments of this utility model;

[0047] Figure 8 This is a schematic diagram of the seventh structure of the anti-disassembly module in this utility model embodiment;

[0048] Figure 9 This is a schematic diagram of the structure of the vehicle-mounted terminal in an embodiment of this utility model.

[0049] Icons: 100 - Anti-tampering module; 110 - Housing; 120 - Control module; 130 - Communication module; 131 - First communication interface; 132 - Protocol conversion chip; 133 - Second communication interface; 140 - Contact pressure detection module; 141 - Reset type limit switch; 142 - Push rod; 150 - Voltage conversion module; 160 - Power supply adjustment module; 161 - Switch module; 162 - Voltage monitoring module; 170 - Built-in power supply; 180 - Auxiliary detection module; 200 - Vehicle terminal; 210 - Timing module. Detailed Implementation

[0050] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0051] This utility model embodiment provides an anti-disassembly module, see reference. Figure 1 As shown, the anti-disassembly module 100 includes at least: a housing 110, a control module 120, a communication module 130, and a contact pressure detection module 140; the fixing surface of the housing 110 is fixedly connected to an external device.

[0052] The output terminal of the contact pressure detection module 140 is connected to the control module 120. The detection component of the contact pressure detection module 140 is disposed through the fixing surface of the housing 110. The contact pressure detection module 140 is used to generate a first level signal when the anti-disassembly module 100 is normally installed through the fixing surface and the detection component is pressed. When the anti-disassembly module 100 is disassembled, the pressure of the detection component is released and a second level signal is generated.

[0053] The output of the control module 120 is connected to the external timing module via the communication module 130. The control module 120 is used to send the preset encrypted data to the external timing module via the communication module 130 according to the preset cycle. The control module 120 is also used to generate a disassembly alarm signal when it receives the second level signal output by the contact pressure detection module 140, and send the disassembly alarm signal to the external timing module via the communication module 130.

[0054] The communication module 130 is used to convert the format of encrypted data and disassembly alarm signals.

[0055] exist Figure 1 In the tamper-proof module 100 shown, the outer casing 110 must possess mechanical strength and internally house the control module 120, communication module 130, and contact pressure detection module 140. The mounting surface of the outer casing 110 must fit tightly against the external device. The outer casing 110 can be connected to the external device via screws, clips, or adhesives to ensure that the detection component of the contact pressure detection module 140 is subjected to continuous pressure. The detection component of the contact pressure detection module 140 penetrates the mounting surface, deforming or making electrical contact due to compression during installation. In the normal installation state, the detection component is compressed by the external device, outputting a continuous first-level signal. In the disassembled state, the external device detaches, causing pressure release, the detection component rebounds or disconnects, and outputs a second-level signal. The first-level signal is a low-level signal, and the second-level signal is a high-level signal. The control module 120 has a built-in timer, and at fixed intervals, the control module 120 sends preset encrypted data to the external timing module via the communication module 130. The encrypted data is generated randomly by the control module 120 after the initial installation of the anti-disassembly module 100, encrypted with a key input from the external timing module, and then stored in the control module 120. The control module 120 also continuously monitors the output of the pressure detection module. If a second-level signal is detected, it immediately determines that a disassembly event has occurred, generates a disassembly alarm signal containing a timestamp, and sends it directly to the timing module via the communication module 130. When the control module 120 determines that a disassembly event has occurred, it can also execute anti-disassembly measures such as data self-destruction. The communication module 130 can convert the encrypted data and the disassembly alarm signal into a signal format conforming to a preset communication protocol, which includes at least one of RS232, TTL, RS485, or CAN bus protocols.

[0056] In this way, the contact pressure detection module directly senses changes in the mounting surface pressure based on the mechanical structure, realizing the detection of physical disassembly and disassembly alarm. The pressure-triggered level signal and the periodic encrypted data transmission constitute cross-verification of the physical and communication layers, eliminating the risk of single-point failure and improving the reliability and security of the anti-disassembly device. The contact pressure detection module immediately switches the output first level signal to a second level signal at the moment of disassembly. When the control module detects the second level signal, it immediately generates a disassembly alarm signal and sends it to the timing module, enabling the external timing module to be aware of the illegal disassembly event immediately, improving the real-time performance of the anti-disassembly module. In addition, the encrypted data is sent at a high frequency with a preset period, allowing the external timing module to continuously verify the status. Any communication interruption or alarm signal is captured within a single cycle. The anti-disassembly module 100 is mounted on a fixed surface and connects to the external timing module through a standardized communication interface, making it easy to integrate into various devices requiring anti-disassembly protection. The anti-disassembly module has a simple structure, low cost, small size, and wide installation range, making it particularly suitable for installation in space-constrained or concealed locations.

[0057] In practical implementation, the contact pressure detection module in the anti-tamper module can have various structures to achieve its function; see [reference needed]. Figure 2 and Figure 3 As shown, the contact pressure detection module 140 includes: at least one reset type limit switch 141;

[0058] The push rod 142 of the reset type limit switch 141 extends from the fixed surface of the housing 110. The moving contact of the reset type limit switch 141 is connected to the input terminal of the control module 120, and the stationary contact of the reset type limit switch 141 is connected to ground. The input terminal of the control module 120 is also connected to the power supply via a pull-up resistor.

[0059] exist Figure 2 and Figure 3In the anti-disassembly module 100 shown, when the contact pressure detection module 140 includes multiple reset-type limit switches 141, the multiple reset-type limit switches 141 are arranged in an array. The push rod 142 of the reset-type limit switch 141 extends from the fixed surface of the housing 110 and serves as a sensitive component for contact with external equipment. When the housing 110 is normally installed, the push rod 142 is pressed; when disassembled, the push rod 142 springs back due to spring reset. The moving contact of the reset-type limit switch 141 is connected to the input terminal of the control module 120, and the stationary contact of the reset-type limit switch 141 is grounded. One end of the pull-up resistor is connected to the power supply, and the other end is connected to the input terminal of the control module 120. The pull-up resistor is used to define the level of the second level signal, where the power supply can be the power supply for the control module 120. In the normal installation state, when the housing 110 is fixed, the push rod 142 of the reset-type limit switch 141 is pressed, and the moving contact inside the reset-type limit switch 141 contacts the stationary contact. At this time, the input terminal of control module 120 is grounded through reset type limit switch 141, and the signal input to control module 120 is low level. When housing 110 is illegally disassembled, the push rod 142 of reset type limit switch 141 is released, and the contact between the moving contact and stationary contact of reset type limit switch 141 is broken due to the internal spring reset. At this time, the input terminal of control module 120 is connected to the power supply through pull-up resistor, and the signal input to control module 120 is high level. Control module 120 continuously monitors the level of the output terminal of contact pressure detection module 140. When it detects that the level jumps from low level to high level, it determines that a disassembly event has occurred, generates a disassembly alarm signal containing a timestamp, and sends it directly to timing module through communication module.

[0060] In practical implementation, the communication module 130 in the anti-tamper module 100 can have various structures to achieve its function, see [reference]. Figure 4 As shown, the communication module 130 includes: a first communication interface 131;

[0061] The input terminal of the first communication interface 131 is connected to the output terminal of the control module 120, and the second terminal of the first communication interface 131 is connected to the communication terminal of the external timing module.

[0062] The first communication interface 131 is used to output encrypted data and disassembly alarm signals in accordance with the TTL communication protocol.

[0063] exist Figure 4In the anti-tamper module 100 shown, the control module 120 can directly output encrypted data and a tamper alarm signal that matches the TTL communication protocol. At this time, the first communication interface 131 can directly output the encrypted data and tamper alarm signal to the external timing module. The first communication interface 131 includes a connector, which provides a physical connection between the external timing module and the control module 120, and outputs the encrypted data and tamper alarm signal to the external timing module. The connector can be a pin header, socket, or RJ45 interface.

[0064] In one possible implementation, see [reference] Figure 5 As shown, the communication module 130 in the anti-tampering module 100 further includes: at least one protocol conversion chip 132 and at least one second communication interface 133; the protocol conversion chip 132 and the second communication interface 133 are configured in a one-to-one correspondence.

[0065] The input terminal of the protocol conversion chip 132 is connected to the output terminal of the control module 120, and the output terminal of the protocol conversion chip 132 is connected to the communication terminal of the external timing module via the second communication interface 133.

[0066] The protocol conversion chip 132 is used to convert encrypted data and disassembly alarm signals into signal formats that conform to a preset communication protocol, and outputs the converted encrypted data and disassembly alarm signals to an external timing module through the second communication interface 133.

[0067] exist Figure 5In the anti-tampering module 100 shown, when the communication module 130 includes multiple protocol conversion chips 132 and corresponding multiple second communication interfaces 133, the types of each protocol conversion chip 132 and each second communication interface 133 are different. The type of the second communication interface 133 matches that of the protocol conversion chip 132. The protocol conversion chip 132 converts the encrypted data and tampering alarm signal output by the control module 120, which match the TTL communication protocol, into a preset communication protocol required by the external timing module. The preset communication protocol is at least one of RS232, RS485, or CAN bus protocol. The protocol conversion chip 132 can be a TTL to RS232 chip, such as MAX3232, and the corresponding second communication interface 133 is an RS232 interface. The protocol conversion chip 132 can also be a TTL to RS485 chip, such as an RS485 transceiver, and the corresponding second communication interface 133 is an RS485 interface. The protocol conversion chip 132 can be a TTL to CAN chip, such as a CAN controller or CAN transceiver. Correspondingly, the second communication interface 133 is a CAN interface. Furthermore, for RS485 and CAN bus protocols, a digital isolator needs to be added between the corresponding protocol conversion chip 132 and the second communication interface 133 to prevent interference caused by ground potential differences. A TVS diode can also be connected in parallel to the pins of the second communication interface 133 to suppress ESD and surge damage.

[0068] In one possible implementation, see [reference] Figure 6 As shown, the anti-tampering module 100 also includes a voltage conversion module 150;

[0069] The input terminal of the voltage conversion module 150 is connected to an external power supply, and the output terminal of the voltage conversion module 150 is connected to the power supply terminal of the control module 120 and the power supply terminal of the communication module 130, respectively.

[0070] The voltage conversion module 150 is used to convert the output voltage of the external power supply into the supply voltage, and to supply power to the control module 120 and the communication module 130.

[0071] exist Figure 6 In the tamper-proof module 100 shown, the voltage conversion module 150 may include a DC-DC converter or an LDO (low dropout linear regulator) to convert the output voltage of the external power supply into the supply voltage. The output voltage of the external power supply is typically 12V, and the supply voltage is typically 3.3V.

[0072] In one possible implementation, see [reference] Figure 6 As shown, the anti-disassembly module 100 also includes: a power supply adjustment module 160 and a built-in power supply 170;

[0073] The detection terminal of the power supply adjustment module 160 is connected to the input terminal of the voltage conversion module 150, the first input terminal of the power supply adjustment module 160 is connected to the output terminal of the voltage conversion module 150, the second input terminal of the power supply adjustment module 160 is connected to the output terminal of the built-in power supply 170, and the output terminal of the power supply adjustment module 160 is connected to the power supply terminal of the control module 120 and the power supply terminal of the communication module 130 respectively.

[0074] The power supply adjustment module 160 is used to supply power to the control module 120 and the communication module 130 through the power supply voltage output by the voltage conversion module 150 or the power supply voltage output by the built-in power supply 170.

[0075] exist Figure 6 In the anti-disassembly module 100 shown, the power supply adjustment module 160 monitors the output voltage of the external power supply. When the output voltage of the external power supply is normal, it connects the voltage conversion module 150 to the control module 120 and the communication module 130, so that the power supply voltage output by the voltage conversion module 150 supplies power to the control module 120 and the communication module 130. When the output voltage of the external power supply is abnormal, it connects the built-in power supply 170 to the control module 120 and the communication module 130, and disconnects the voltage conversion module 150 from the control module 120 and the communication module 130, so that the power supply voltage output by the built-in power supply 170 supplies power to the control module 120 and the communication module 130.

[0076] In practical implementation, the power supply adjustment module 160 in the anti-disassembly module 100 can have various structures to achieve its function, see [reference]. Figure 7 As shown, the power supply adjustment module 160 includes: a switch module 161 and a voltage monitoring module 162;

[0077] The input terminal of the voltage monitoring module 162 is connected to the input terminal of the voltage conversion module 150, and the output terminal of the voltage monitoring module 162 is connected to the control module 120.

[0078] The first input terminal of the switch module 161 is connected to the output terminal of the voltage conversion module 150, the second input terminal of the switch module 161 is connected to the output terminal of the built-in power supply 170, the output terminal of the switch module 161 is connected to the power supply terminal of the control module 120 and the power supply terminal of the communication module 130 respectively, and the control terminal of the switch module 161 is connected to the control module 120.

[0079] exist Figure 7In the anti-tamper module 100 shown, the voltage monitoring module 162 detects the output voltage of the external power supply in real time to obtain the external power supply voltage detection value, and transmits the external power supply voltage detection value to the control module 120. The control module 120 compares the external power supply voltage detection value with a preset voltage threshold, and controls the switch module 161 to connect the power supply terminals of the control module 120 and the communication module 130 to the built-in power supply 170 or the voltage conversion module 150 according to the comparison result. Specifically, when the external power supply voltage detection value is greater than the preset voltage threshold, corresponding to the external power supply being able to reliably supply power to the anti-tamper module, the switch module 161, under the control of the control module 120, connects and maintains the connection between the power supply terminals of the control module 120 and the communication module 130 to the voltage conversion module 150. When the external power supply voltage detection value is less than the preset voltage threshold, corresponding to the external power supply being unable to reliably supply power to the anti-tamper module, the switch module 161, under the control of the control module 120, connects and maintains the connection between the power supply terminals of the control module 120 and the communication module 130 to the built-in power supply 170. In addition, due to the limited power of the built-in power supply, after the power supply terminals of the control module 120 and the communication module 130 are connected to the built-in power supply 170, the control module stops sending data to the external timing module, the anti-tampering module 100 is in low power mode, and records the time when the built-in power supply is powered.

[0080] In one possible implementation, see [reference] Figure 8 As shown, the anti-disassembly module 100 also includes: an auxiliary detection module 180;

[0081] The auxiliary detection module 180 is located inside the housing 110, and the output terminal of the auxiliary detection module 180 is connected to the control module 120.

[0082] The auxiliary detection module 180 is used to detect the magnetic field strength at the installation position of the anti-tamper module 100. When the magnetic field strength is lower than the set threshold, it outputs a first level signal to the control module 120. When the magnetic field strength exceeds the set threshold, it outputs a second level signal to the control module 120.

[0083] The control module 120 is used to generate a disassembly alarm signal when it receives the second level signal output by the auxiliary detection module 180, and send the disassembly alarm signal to the external timing module through the communication module 130.

[0084] exist Figure 8In the anti-disassembly module 100 shown, under normal installation conditions, the anti-disassembly module 100 is fixed in a designated position, and the surrounding magnetic field remains stable. When the magnetic field strength measured by the auxiliary detection module 180 is below a set threshold, the auxiliary detection module 180 outputs a first-level signal (e.g., low level) to the control module 120. During abnormal disassembly, when the state of the reset-type limit switch 141 is maintained by a magnet, and the magnetic field strength measured by the auxiliary detection module 180 exceeds the set threshold, it outputs a second-level signal (e.g., high level) to the control module 120. The control module 120, upon receiving the second-level signal output by the auxiliary detection module 180, determines that a disassembly alarm signal is an abnormal event and immediately generates a disassembly alarm signal. The alarm signal is sent to an external timing module via the communication module 130, so that the external timing module records the event time and triggers a safety linkage including device locking and alarm activation.

[0085] In practical implementation, the auxiliary detection module in the anti-disassembly module can have various structures to achieve its function. The auxiliary detection module includes: a switch-type Hall sensor;

[0086] The switch-type Hall sensor is located inside the housing, and its output is connected to the control module.

[0087] In practical applications, the switch-type Hall sensor is housed inside the casing, with its output directly connected to the control module. The Hall sensor outputs different level signals based on changes in magnetic field strength. When the magnetic field strength is below a set threshold, it outputs a first-level signal to the control module; when the magnetic field strength exceeds the set threshold, it outputs a second-level signal to the control module.

[0088] Based on the same concept, this utility model embodiment also provides a vehicle-mounted terminal 200, see reference. Figure 9 As shown, the vehicle terminal 200 includes: an anti-tamper module 100 and a timing module 210;

[0089] The input terminal of the anti-disassembly module 100 is connected to the vehicle battery, and the output terminal of the anti-disassembly module 100 is connected to the timing module 210; the fixing surface of the housing 110 of the anti-disassembly module 100 is fixedly connected to the plane inside the car.

[0090] In practical applications, the anti-tamper module 100 is affixed to the vehicle's central control area and is continuously powered by the vehicle's battery. Simultaneously, the anti-tamper module 100 and the timing module 210 are connected via a data cable. When both modules are powered on, the anti-tamper module 100 randomly generates a string. The timing terminal sends a key to the anti-tamper module 100. Upon receiving the key, the anti-tamper module 100 encrypts the randomly generated string and sends it back to the timing terminal according to a preset cycle. When the module is removed and moved without being powered off, the control module 120 is triggered to clear the data, preventing the timing terminal from obtaining the encrypted string, corresponding to the removal of the vehicle terminal 200. When the anti-tamper module 100 is powered off or its communication line with the timing module 210 is disconnected, the timing module 210 detects a communication failure and determines that the vehicle terminal 200 has been removed. When the anti-tamper module 100 is powered on again, the randomly generated string changes, allowing the timing module 210 to confirm that the vehicle terminal 200 has been removed during communication with the anti-tamper module 100.

[0091] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0092] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of the embodiments of this utility model. Therefore, if these modifications and variations to the embodiments of this utility model fall within the scope of the claims of this utility model and their equivalents, then this utility model also intends to include these modifications and variations.

Claims

1. An anti-disassembly module, characterized in that, include: The enclosure includes a control module, a communication module, and a contact pressure detection module; the fixed surface of the enclosure is fixedly connected to an external device. The output terminal of the contact pressure detection module is connected to the control module, and the detection component of the contact pressure detection module is disposed through the fixing surface of the housing; the contact pressure detection module is used to generate a first level signal when the anti-disassembly module is normally installed through the fixing surface and the detection component is under pressure. When the anti-tamper module is disassembled, the detection component releases pressure and generates a second-level signal; The output of the control module is connected to the external timing module via the communication module; the control module is used to send preset encrypted data to the external timing module via the communication module according to a preset period; the control module is also used to generate a disassembly alarm signal when it receives the second level signal output by the contact pressure detection module, and send the disassembly alarm signal to the external timing module via the communication module. The communication module is used to convert the encrypted data and the disassembly alarm signal into different formats.

2. The anti-disassembly module according to claim 1, characterized in that, The contact pressure detection module includes: at least one resettable limit switch; The push rod of the reset type limit switch extends from the fixed surface of the housing. The moving contact of the reset type limit switch is connected to the input terminal of the control module, and the stationary contact of the reset type limit switch is connected to ground. The input terminal of the control module is also connected to the power supply via a pull-up resistor.

3. The anti-disassembly module according to claim 1, characterized in that, The communication module includes: a first communication interface; The input end of the first communication interface is connected to the output end of the control module, and the second end of the first communication interface is connected to the communication end of the external timing module. The first communication interface is used to output the encrypted data and the disassembly alarm signal in accordance with the TTL communication protocol.

4. The anti-disassembly module according to claim 3, characterized in that, The communication module further includes: at least one protocol conversion chip and at least one second communication interface; the protocol conversion chip and the second communication interface are configured in a one-to-one correspondence. The input terminal of the protocol conversion chip is connected to the output terminal of the control module, and the output terminal of the protocol conversion chip is connected to the communication terminal of the external timing module via the second communication interface. The protocol conversion chip is used to convert the encrypted data and the disassembly alarm signal into a signal format that conforms to a preset communication protocol, and output the converted encrypted data and the disassembly alarm signal to the external timing module through the second communication interface.

5. The anti-disassembly module according to any one of claims 1-4, characterized in that, Also includes: Voltage conversion module; The input terminal of the voltage conversion module is connected to an external power supply, and the output terminal of the voltage conversion module is connected to the power supply terminal of the control module and the power supply terminal of the communication module, respectively. The voltage conversion module is used to convert the output voltage of the external power supply into a supply voltage, and to supply power to the control module and the communication module through the supply voltage.

6. The anti-disassembly module according to claim 5, characterized in that, Also includes: Power supply adjustment module and built-in power supply; The detection terminal of the power supply adjustment module is connected to the input terminal of the voltage conversion module, the first input terminal of the power supply adjustment module is connected to the output terminal of the voltage conversion module, the second input terminal of the power supply adjustment module is connected to the output terminal of the built-in power supply, and the output terminal of the power supply adjustment module is connected to the power supply terminal of the control module and the power supply terminal of the communication module respectively. The power supply adjustment module is used to supply power to the control module and the communication module through the power supply voltage output by the voltage conversion module or the power supply voltage output by the built-in power supply.

7. The anti-disassembly module according to claim 6, characterized in that, The power supply adjustment module includes: a switching module and a voltage monitoring module; The input terminal of the voltage monitoring module is connected to the input terminal of the voltage conversion module, and the output terminal of the voltage monitoring module is connected to the control module. The first input terminal of the switch module is connected to the output terminal of the voltage conversion module, the second input terminal of the switch module is connected to the output terminal of the built-in power supply, the output terminal of the switch module is connected to the power supply terminal of the control module and the power supply terminal of the communication module respectively, and the control terminal of the switch module is connected to the control module.

8. The anti-disassembly module according to claim 5, characterized in that, Also includes: Auxiliary detection module; The auxiliary detection module is located inside the housing, and its output is connected to the control module. The auxiliary detection module is used to detect the magnetic field strength at the installation position of the anti-disassembly module. When the magnetic field strength is lower than a set threshold, it outputs a first level signal to the control module. When the magnetic field strength exceeds the set threshold, it outputs a second level signal to the control module. The control module is used to generate a disassembly alarm signal when it receives the second level signal output by the auxiliary detection module, and send the disassembly alarm signal to the external timing module through the communication module.

9. The anti-disassembly module according to claim 8, characterized in that, The auxiliary detection module includes: a switch-type Hall sensor; The switch-type Hall sensor is disposed inside the housing, and the output terminal of the switch-type Hall sensor is connected to the control module.

10. A vehicle-mounted terminal, characterized in that, include: The anti-disassembly module and timing module as described in any one of claims 1-9 above; The input end of the anti-disassembly module is connected to the vehicle battery, and the output end of the anti-disassembly module is connected to the timing module; the fixed surface of the outer shell of the anti-disassembly module is fixedly connected to the plane inside the car.

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