Anti-lost alarm method and anti-lost alarm device of communication interface conversion device

Abstract

The application discloses a kind of communication interface conversion equipment's anti-lost alarm method and anti-lost alarm device, it is related to automobile diagnosis technical field, the method includes the following steps: when monitoring the power connection state of communication interface conversion equipment is connection, then whether communication interface conversion equipment is without communication activity is judged;If yes, then start anti-lost timing, and control alarm module issues anti-lost alarm signal, and when monitoring the power connection state is changed from connection to disconnect, then control spare energy storage unit is powered for alarm module, and control alarm module issues power-off alarm signal.The application is powered by setting alarm module and spare energy storage unit, and issues anti-lost alarm signal when communication interface conversion equipment power connection and without communication activity, and when communication interface conversion equipment power is changed from connection to disconnect, power-off alarm signal is issued by spare energy storage unit to remind staff, can avoid leaving communication interface conversion equipment in vehicle or field.

Description

Technical Field

[0001] This invention relates to the field of automotive diagnostic technology, specifically to a method and device for preventing loss of communication interface conversion equipment. Background Technology

[0002] The vehicle communication interface conversion device for diagnostic tools is a core communication interface conversion device in automotive aftermarket service, production line testing, fault diagnosis, data stream reading, routine control, electronic control unit (ECU) software flashing, and online / offline diagnostics. This communication interface conversion device connects to the vehicle via the on-board diagnostic (OBD) interface on one end, and to the diagnostic computer or diagnostic software via WiFi, RJ45, Ethernet, or other host computer interfaces on the other end. In repair shops, production line testing, and remote diagnostic scenarios, the communication interface conversion device is small in size and is usually temporarily plugged into the vehicle's OBD port. After the diagnostic personnel complete the diagnosis or flashing, the communication interface conversion device is retrieved.

[0003] However, due to their small size and wireless connection to diagnostic computers or software, communication interface conversion devices are easily left behind in vehicles or at the scene. Summary of the Invention

[0004] This invention provides a method and device for preventing loss of communication interface conversion equipment, which can solve the technical problem that communication interface conversion equipment is small in size and wirelessly connected to diagnostic computers or diagnostic software, making it easy to leave behind in vehicles or on-site.

[0005] In a first aspect, embodiments of the present invention provide a method for preventing loss alarm of a communication interface conversion device, comprising the following steps: When the power connection status of the communication interface conversion device is detected as connected, it is determined whether the communication interface conversion device has no communication activity. If so, the anti-loss timer is activated, and the alarm module is controlled to issue an anti-loss alarm signal. When the power connection status is detected to change from connected to disconnected, the backup energy storage unit is controlled to supply power to the alarm module, and the alarm module is controlled to issue a power failure alarm signal.

[0006] In conjunction with the first aspect, in one embodiment, after determining whether the communication interface conversion device has no communication activity when the power connection status of the communication interface conversion device is detected to be connected, the method further includes the following steps: If not, when the power connection status changes from connected to disconnected and the communication activity status changes from active to inactive, the backup energy storage unit of the communication interface conversion device is controlled to supply power to the alarm module of the communication interface conversion device, and the alarm module is controlled to issue a power failure alarm signal.

[0007] In conjunction with the first aspect, in one implementation, after the alarm module issues an anti-loss alarm signal, the following steps are included: If a user confirmation signal is received, the anti-loss alarm signal will be stopped. If a mute signal is received, the anti-loss alarm signal is paused. After the mute duration reaches the first preset duration, if the communication activity status is detected as having communication activity, the anti-loss timer is stopped. If the communication activity status is detected as having no communication activity, the anti-loss alarm signal is issued again.

[0008] In conjunction with the first aspect, in one implementation, controlling the alarm module to issue an anti-loss alarm signal includes the following steps: Based on the duration of the anti-loss timing, the alarm module of the control communication interface conversion device sends out different levels of anti-loss alarm signals.

[0009] In conjunction with the first aspect, in one implementation, controlling the alarm module of the communication interface conversion device to issue different levels of anti-loss alarm signals according to the duration of the anti-loss timer includes the following steps: When the anti-loss timer duration is less than or equal to the second preset duration, the alarm module is controlled to emit a flashing signal at the first preset frequency. When the anti-loss timer duration is greater than the second preset duration and less than or equal to the third preset duration, the alarm module is controlled to emit a buzzer signal at the second preset frequency. When the anti-loss timer duration exceeds the third preset duration, the alarm module is controlled to emit a flashing signal at the third preset frequency and a buzzer signal at the fourth preset frequency.

[0010] In conjunction with the first aspect, in one embodiment, the step of controlling the backup energy storage unit to supply power to the alarm module and controlling the alarm module to issue a power failure alarm signal when the power connection status is detected to change from connected to disconnected includes the following steps: The alarm module is controlled to emit a buzzer signal at a fifth preset frequency and a flashing signal at a sixth preset frequency.

[0011] In conjunction with the first aspect, in one embodiment, the step of controlling the backup energy storage unit to supply power to the alarm module and controlling the alarm module to issue a power failure alarm signal when the power connection status is detected to change from connected to disconnected further includes the following steps: The communication interface conversion device sends a wireless signal to the terminal device indicating that its power connection is disconnected via wireless broadcast.

[0012] In conjunction with the first aspect, in one implementation, determining whether the communication interface conversion device has no communication activity includes the following steps: Based on at least one of the acquired CAN bus receive activity signal, vehicle Ethernet physical link activation indication signal, Wi-Fi association success indication signal, diagnostic data interaction activity indication signal, and flashing or programming mode activation indication signal, it is determined whether the communication interface conversion device has communication activity.

[0013] In conjunction with the first aspect, in one embodiment, the backup energy storage unit of the control communication interface conversion device supplies power to the alarm module of the communication interface conversion device, including the following steps: The supercapacitor in the communication interface conversion device is controlled to supply power to the alarm module.

[0014] Secondly, embodiments of the present invention provide an anti-loss alarm device for a communication interface conversion device, comprising: The judgment unit is used to determine whether the communication interface conversion device has no communication activity when the power connection status of the communication interface conversion device is detected to be connected. The execution unit is configured to, if so, start the anti-loss timing and control the alarm module to issue an anti-loss alarm signal, and when it detects that the power connection status changes from connected to disconnected, control the backup energy storage unit to supply power to the alarm module and control the alarm module to issue a power failure alarm signal.

[0015] The beneficial effects of the technical solutions provided by the embodiments of the present invention include: This invention discloses an anti-loss alarm method and device for a communication interface conversion device. The anti-loss alarm method for the communication interface conversion device includes the following steps: when the power connection status of the communication interface conversion device is detected as connected, it is determined whether the communication interface conversion device is not in communication activity; if so, an anti-loss timer is started, and the alarm module is controlled to issue an anti-loss alarm signal; and when the power connection status is detected to change from connected to disconnected, the backup energy storage unit is controlled to supply power to the alarm module, and the alarm module is controlled to issue a power failure alarm signal. This invention, by setting an alarm module and a backup energy storage unit, can issue an anti-loss alarm signal when the communication interface conversion device is powered on and there is no communication activity, and when the power of the communication interface conversion device changes from connected to disconnected, the backup energy storage unit supplies power to issue a power failure alarm signal to remind personnel, thus preventing the communication interface conversion device from being left behind in vehicles or on-site. Attached Figure Description

[0016] Figure 1 This is a flowchart illustrating an embodiment of the anti-loss alarm method for the communication interface conversion device of the present invention; Figure 2 This is a flowchart illustrating another embodiment of the anti-loss alarm method for the communication interface conversion device of the present invention; Figure 3 For the present invention Figure 1 A detailed flowchart of step S20; Figure 4 This is a schematic diagram of the functional modules of an embodiment of the anti-loss alarm device of the communication interface conversion equipment of the present invention. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figure 1 As shown in the figure, an embodiment of the present invention discloses an anti-loss alarm method for a communication interface conversion device, comprising the following steps: Step S10: When the power connection status of the communication interface conversion device is detected to be connected, it is determined whether the communication interface conversion device has no communication activity. Step S20: If yes, start the anti-loss timer and control the alarm module to issue an anti-loss alarm signal. When the power connection status is detected to change from connected to disconnected, control the backup energy storage unit to supply power to the alarm module and control the alarm module to issue a power failure alarm signal.

[0019] The power connection status is determined using signals such as OBD_VBAT_PRESENT, OBD_POWER_DROP, and LOW_VOLTAGE. Specifically, OBD_VBAT_PRESENT indicates that the OBD supply voltage has reached the connection threshold, serving as a criterion for a connected power supply; OBD_POWER_DROP indicates a rapid drop in the OBD supply voltage or a drop below the disconnection threshold, triggering main power disconnection, switching to the backup energy storage unit, and initiating a power failure alarm; LOW_VOLTAGE indicates that the OBD supply voltage is below the normal operating threshold but not completely disconnected, suppressing false power status judgments, recording undervoltage anomalies, or prematurely entering low-power protection. These signals do not need to be present simultaneously; one or more can be selected based on the sampling circuit or power monitoring chip used. For example, the connection threshold can be set to 8V for 100ms, the disconnection threshold to 6V for 20ms, and the undervoltage threshold to 7V for 100ms; these thresholds and durations can be adjusted according to the vehicle's power supply system and anti-interference requirements.

[0020] When the power connection status is "connected," the communication activity detection module built into the communication interface conversion device is used to determine whether the communication interface conversion device is in a communication activity state. Data transmission through the communication interface conversion device indicates that the communication activity state is active.

[0021] Furthermore, the communication activity detection module can be connected to a Controller Area Network (CAN) transceiver, Ethernet PHY, Wi-Fi module, or the status output terminal of the main control processor to acquire at least one communication activity indication signal from among CAN message reception pulses, Ethernet link activation, Wi-Fi association, diagnostic data interaction, flashing or programming mode activation, and host computer heartbeat. It is not necessary to acquire all communication activity indication signals: if any of the selected signals is valid within a preset detection window, the communication activity status is determined to be active; only if all selected signals are invalid within a preset detection duration is the communication activity status determined to be inactive. For example, the preset detection duration can be 5 seconds, and debouncing can be used to determine activity after two consecutive detection cycles without activity.

[0022] When the communication interface conversion device is powered on and has communication activity, it means the device is working and the anti-loss timer will not be triggered. When the communication interface conversion device is powered on but has no communication activity, it means the device is connected to the vehicle via the OBD interface but is not performing any work, and the anti-loss timer will be triggered.

[0023] Therefore, the power monitoring signal and the communication activity indication signal form the following state correspondence: when the power is connected and at least one communication activity exists, it is in the working state, and the anti-loss timer is not activated; when the power is connected and the selected communication activity indication signal is invalid within the preset detection time, it is in the idle connection state, and the anti-loss timer is activated; when the power changes from connected to disconnected, it is in the unplugged or detached state, the backup energy storage unit is switched, and a power failure alarm signal is issued. The power connection status is determined independently by the power monitoring signal, and the communication activity indication signal is not used to replace the determination of the power connection status.

[0024] After the anti-loss timer is activated, the alarm module emits an anti-loss alarm signal to remind staff that the communication interface conversion device is at risk of being lost. When the power connection status of the communication interface conversion device changes from connected to disconnected after the anti-loss timer is activated, it indicates that the communication interface conversion device has been unplugged while not in operation. The built-in backup energy storage unit of the communication interface conversion device temporarily powers the alarm module, emitting a power failure alarm signal to remind staff that the communication interface conversion device is in the unplugged state.

[0025] This invention, by setting up an alarm module and a backup energy storage unit, can issue an anti-loss alarm signal when the communication interface conversion device is powered on and there is no communication activity. When the power of the communication interface conversion device changes from connected to disconnected, the backup energy storage unit supplies power to issue a power failure alarm signal to remind the staff, which can prevent the communication interface conversion device from being left in the vehicle or on site.

[0026] like Figure 2 As shown, in one embodiment, after determining whether the communication interface conversion device has no communication activity when the power connection status of the communication interface conversion device is detected to be connected, the method further includes the following steps: Step S30: If not, when the power connection status changes from connected to disconnected and the communication activity status changes from having communication activity to not having communication activity, control the backup energy storage unit of the communication interface conversion device to supply power to the alarm module of the communication interface conversion device, and control the alarm module to issue a power failure alarm signal.

[0027] When the communication interface conversion device is in operation, if it is accidentally unplugged or dropped, OBD power supply interruption and communication link interruption usually occur simultaneously. The host computer displays a connection abnormality due to interruption of diagnostic requests, responses, or data stream writing, allowing operators to detect it immediately. At the same time, once the power monitoring module detects that the power connection status has changed from connected to disconnected, it can directly switch to the backup energy storage unit and control the alarm module to issue a power failure alarm signal without waiting for the anti-loss timer in the idle state to expire. Thus, the idle forgetting scenario is handled through tiered anti-loss reminders, while the accidental unplugging or dropping scenario is handled through communication interruption prompts and power failure alarms.

[0028] like Figure 3 As shown, in one embodiment, after the alarm module issues an anti-loss alarm signal, the following steps are included: Step S21: If a user confirmation signal is received, the anti-loss alarm signal is stopped. Step S22: If a mute signal is received, the anti-loss alarm signal is paused. After the mute duration reaches the first preset duration, if the communication activity status is detected as having communication activity, the anti-loss timer is stopped. If the communication activity status is detected as having no communication activity, the anti-loss alarm signal is issued again.

[0029] The communication interface conversion device is also equipped with a user confirmation key and a mute key. After issuing an anti-loss alarm signal, the operator can also send a user confirmation signal back to the communication interface conversion device via the user confirmation key and a mute signal back via the mute key. Alternatively, both user confirmation and mute signals can be sent using a single key. In one embodiment, the operator can send a mute signal by short-pressing the key and a user confirmation signal by long-pressing it. When the user long-presses the key, the communication interface conversion device receives the user confirmation signal and stops sending the anti-loss alarm signal. After the user short-presses the key, the communication interface conversion device stops sending the anti-loss alarm signal and enters a mute window, which corresponds to a first preset duration T1. If communication is restored within the mute window, the anti-loss state is exited; if communication is not restored after the mute window ends, the anti-loss alarm signal is re-issued. As a specific embodiment, a key duration greater than or equal to 100ms and less than 2s is identified as a short press, and a key duration greater than or equal to 3s is identified as a long press. The interval between 2s and 3s can be considered as an anti-shake or invalid interval; the first preset duration T1 can be set to 60s. The above button thresholds and mute duration can be adjusted according to human-computer interaction requirements.

[0030] This invention controls the alarm module by introducing a confirmation signal and a mute signal mechanism. When an anti-loss alarm signal is issued, the communication interface conversion device can immediately stop issuing the alarm signal based on the received confirmation and mute signals. This design allows operators to proactively intervene and stop the alarm upon receiving an alarm notification, effectively preventing continuous alarms from interfering with normal work.

[0031] In one embodiment, controlling the alarm module to issue an anti-loss alarm signal includes the following steps: according to the duration of the anti-loss timer, controlling the alarm module of the communication interface conversion device to issue anti-loss alarm signals of different levels accordingly.

[0032] Considering that the longer the communication interface conversion device remains inactive, the greater the risk of loss, this invention sets up multiple different levels of anti-loss alarm signals based on the duration of the anti-loss timing.

[0033] This invention sets up multiple anti-loss alarm signals of different levels corresponding to the duration of the anti-loss timer, and can output gradually stronger anti-loss alarm signals according to the risk of loss from low to high.

[0034] In one embodiment, controlling the alarm module of the communication interface conversion device to emit different levels of anti-loss alarm signals according to the duration of the anti-loss timer includes the following steps: when the anti-loss timer duration is less than or equal to a second preset duration, controlling the alarm module to emit a flashing signal at a first preset frequency; when the anti-loss timer duration is greater than the second preset duration and less than or equal to a third preset duration, controlling the alarm module to emit a buzzer signal at a second preset frequency; when the anti-loss timer duration is greater than the third preset duration, controlling the alarm module to emit a flashing signal at a third preset frequency and a buzzer signal at a fourth preset frequency.

[0035] The anti-loss timer T has two judgment time points: a second preset duration T2 and a third preset duration T3. As a specific embodiment, T2 can be set to 5 minutes and T3 can be set to 10 minutes.

[0036] When Tanti ≤ T2, the communication interface conversion device is in a low-risk loss state and enters the first-level anti-loss reminder. The LED indicator in the control alarm module turns yellow and flashes slowly at a first preset frequency. As a specific embodiment, the first preset frequency is 0.5Hz, with each flashing cycle lasting 500ms on and 1500ms off. When T2 <T 防 When the time is ≤T3, the communication interface conversion device is in a medium-risk loss state and enters a level 2 alert, controlling the buzzer in the alarm module to sound intermittently at a second preset frequency. As a specific embodiment, the buzzer sound source frequency is 2.7kHz, and the second preset frequency represents a sounding beat of 1Hz, that is, each 1s cycle sounds for 200ms and stops for 800ms; When T>T3, the communication interface conversion device is in a high-risk loss state, entering a level 3 alert. The LED indicator in the control alarm module lights up red and flashes rapidly at a third preset frequency, while simultaneously controlling the buzzer to sound at a fourth preset frequency. In a specific embodiment, the third preset frequency is 2Hz, with the indicator light on for 250ms and off for 250ms; the buzzer's sound source frequency is 2.7kHz, and the fourth preset frequency represents a 2Hz beeping beat, i.e., a 300ms beeping followed by a 200ms pause.

[0037] Of course, the indicator light color, flashing frequency, and buzzer sounding frequency given in this invention are only one embodiment of the anti-loss alarm signal. Other anti-loss alarm signals that combine indicator lights and buzzers are within the protection scope of this invention as long as they can distinguish the anti-loss risk level.

[0038] This invention sets up anti-loss alarm signals corresponding to the anti-loss level, which can issue differentiated warnings with different sound and light frequencies or intensities at different distances or risk levels, thereby improving the user's perception efficiency and reducing false alarm interference.

[0039] In one embodiment, when the power connection status is detected to change from connected to disconnected, the backup energy storage unit is controlled to supply power to the alarm module, and the alarm module is controlled to issue a power failure alarm signal, which includes the following steps: controlling the alarm module to issue a buzzer signal at a fifth preset frequency and a flashing signal at a sixth preset frequency.

[0040] When the communication interface conversion device is powered off, it means that the device has been unplugged from the OBD interface. The device may have been recycled or accidentally detached. The backup energy storage unit inside the device powers the alarm module, causing the indicator light to illuminate red and flash at a sixth preset frequency, while simultaneously causing the buzzer to sound at a fifth preset frequency. In a specific embodiment, the sixth preset frequency is 4Hz, with the indicator light on for 125ms and off for 125ms; the buzzer's sound source frequency is 2.7kHz, and the fifth preset frequency represents a 2Hz beeping beat, i.e., a 250ms beep followed by a 250ms pause, lasting 10 seconds or until a user confirmation signal is received. The alarm duration can be adjusted according to the capacity of the backup energy storage unit.

[0041] This invention uses an alarm module to emit a buzzer signal at a fifth preset frequency and a flashing signal at a sixth preset frequency to remind the operator that the communication interface conversion device is in the unplugged state.

[0042] In one embodiment, the step of controlling the backup energy storage unit to supply power to the alarm module and controlling the alarm module to issue a power failure alarm signal when the power connection status is detected to change from connected to disconnected further includes the following steps: sending a wireless signal to the terminal device via wireless broadcast indicating that the power connection status of the communication interface conversion device is disconnected.

[0043] The alarm module also includes a wireless broadcast module. When the power monitoring module detects a change in power connection status from connected to disconnected, the alarm module transmits a wireless signal indicating that the power connection status of the communication interface conversion device is disconnected via Bluetooth Low Energy (BLE) or multiplexed Wi-Fi Low Energy broadcast. Furthermore, this wireless signal may include the communication interface conversion device's serial number, loss status, last connection status, or energy storage status, facilitating the diagnostic scanning and location of lost communication interface conversion devices using computers or mobile phones.

[0044] This invention transmits a wireless signal to the terminal device indicating that the power connection of the communication interface conversion device is disconnected via wireless broadcast. The lost communication interface conversion device can be located by scanning with a diagnostic computer or mobile phone, reducing the risk of loss.

[0045] In one embodiment, determining whether the communication interface conversion device has no communication activity includes the following steps: determining whether the communication interface conversion device has communication activity based on at least one of the acquired CAN bus reception activity signal, vehicle Ethernet physical link activation indication signal, Wi-Fi association success indication signal, diagnostic data interaction activity indication signal, and flashing or programming mode activation indication signal.

[0046] The power monitoring signals include at least one of OBD_VBAT_PRESENT, OBD_POWER_DROP, and LOW_VOLTAGE. The power connection status is determined based on the power monitoring signals.

[0047] When any selected communication activity indicator signal indicates the presence of communication activity, it is determined that there is communication activity; when none of the selected communication activity indicator signals indicate the presence of communication activity within a preset detection period, it is determined that there is no communication activity. Therefore, determining the power connection status and communication activity status does not require the collection of all listed signals; one or more signals can be selected based on the CAN, Ethernet, Wi-Fi, or diagnostic functions configured in the device to determine the communication activity status.

[0048] In one embodiment, the backup energy storage unit of the control communication interface conversion device supplies power to the alarm module of the communication interface conversion device, including the following steps: controlling the supercapacitor in the communication interface conversion device to supply power to the alarm module.

[0049] The backup energy storage unit has a short-term energy storage function and can be a supercapacitor. Alternatively, it can be a small-capacity rechargeable energy storage unit or a holding capacitor array. The backup energy storage unit automatically charges when the communication interface conversion device is plugged into the OBD interface and connected to the vehicle. The backup energy storage unit is not used to support long-term diagnostic communication; it is only used to supply power to the alarm module after the communication interface conversion device loses power, ensuring that the alarm module emits a buzzer signal at the fifth preset frequency and a flashing signal at the sixth preset frequency.

[0050] like Figure 4 As shown in the figure, this embodiment of the invention also discloses an anti-loss alarm device for a communication interface conversion device, comprising: The judgment unit is used to determine whether the communication interface conversion device has no communication activity when the power connection status of the communication interface conversion device is detected to be connected. The execution unit is configured to, if so, start the anti-loss timing and control the alarm module to issue an anti-loss alarm signal, and when it detects that the power connection status changes from connected to disconnected, control the backup energy storage unit to supply power to the alarm module and control the alarm module to issue a power failure alarm signal.

[0051] The functions of each module in the anti-loss alarm device of the above-mentioned communication interface conversion device correspond to the steps in the anti-loss alarm method embodiment of the above-mentioned communication interface conversion device, and their functions and implementation processes will not be described in detail here.

[0052] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0053] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A method for preventing loss alarm of a communication interface conversion device, characterized in that, Includes the following steps: When the power connection status of the communication interface conversion device is detected as connected, it is determined whether the communication interface conversion device has no communication activity. If so, the anti-loss timer is activated, and the alarm module is controlled to issue an anti-loss alarm signal. When the power connection status is detected to change from connected to disconnected, the backup energy storage unit is controlled to supply power to the alarm module, and the alarm module is controlled to issue a power failure alarm signal.

2. The anti-loss alarm method for the communication interface conversion device according to claim 1, characterized in that, When the power connection status of the communication interface conversion device is detected to be connected, after determining whether the communication interface conversion device has no communication activity, the following steps are also included: If not, when the power connection status changes from connected to disconnected and the communication activity status changes from active to inactive, the backup energy storage unit of the communication interface conversion device is controlled to supply power to the alarm module of the communication interface conversion device, and the alarm module is controlled to issue a power failure alarm signal.

3. The anti-loss alarm method for the communication interface conversion device according to claim 1, characterized in that, After the alarm module issues the anti-loss alarm signal, the following steps are included: If a user confirmation signal is received, the anti-loss alarm signal will be stopped. If a mute signal is received, the anti-loss alarm signal is paused. After the mute duration reaches the first preset duration, if the communication activity status is detected as having communication activity, the anti-loss timer is stopped. If the communication activity status is detected as having no communication activity, the anti-loss alarm signal is issued again.

4. The anti-loss alarm method for the communication interface conversion device according to claim 1, characterized in that, The process of controlling the alarm module to issue an anti-loss alarm signal includes the following steps: Based on the duration of the anti-loss timing, the alarm module of the control communication interface conversion device sends out different levels of anti-loss alarm signals.

5. The anti-loss alarm method for the communication interface conversion device according to claim 4, characterized in that, The step of controlling the alarm module of the communication interface conversion device to issue different levels of anti-loss alarm signals according to the duration of the anti-loss timer includes the following steps: When the anti-loss timer duration is less than or equal to the second preset duration, the alarm module is controlled to emit a flashing signal at the first preset frequency. When the anti-loss timer duration is greater than the second preset duration and less than or equal to the third preset duration, the alarm module is controlled to emit a buzzer signal at the second preset frequency. When the anti-loss timer duration exceeds the third preset duration, the alarm module is controlled to emit a flashing signal at the third preset frequency and a buzzer signal at the fourth preset frequency.

6. The anti-loss alarm method for the communication interface conversion device according to claim 1, characterized in that, When the power connection status is detected to change from connected to disconnected, the backup energy storage unit is controlled to supply power to the alarm module, and the alarm module is controlled to issue a power failure alarm signal, including the following steps: The alarm module is controlled to emit a buzzer signal at a fifth preset frequency and a flash signal at a sixth preset frequency.

7. The anti-loss alarm method for the communication interface conversion device according to claim 1, characterized in that, The method of controlling the backup energy storage unit to supply power to the alarm module and controlling the alarm module to issue a power failure alarm signal when the power connection status is detected to change from connected to disconnected also includes the following steps: The communication interface conversion device sends a wireless signal to the terminal device indicating that its power connection is disconnected via wireless broadcast.

8. The anti-loss alarm method for the communication interface conversion device according to claim 1, characterized in that, The process of determining whether the communication interface conversion device has no communication activity includes the following steps: Based on at least one of the acquired CAN bus receive activity signal, vehicle Ethernet physical link activation indication signal, Wi-Fi association success indication signal, diagnostic data interaction activity indication signal, and flashing or programming mode activation indication signal, it is determined whether the communication interface conversion device has communication activity.

9. The anti-loss alarm method for the communication interface conversion device according to claim 1, characterized in that, The backup energy storage unit of the control communication interface conversion device supplies power to the alarm module of the communication interface conversion device, including the following steps: The supercapacitor in the communication interface conversion device is controlled to supply power to the alarm module.

10. A loss alarm device for a communication interface conversion equipment, characterized in that, include: The judgment unit is used to determine whether the communication interface conversion device has no communication activity when the power connection status of the communication interface conversion device is detected to be connected. The execution unit is configured to, if so, start the anti-loss timing and control the alarm module to issue an anti-loss alarm signal, and when it detects that the power connection status changes from connected to disconnected, control the backup energy storage unit to supply power to the alarm module and control the alarm module to issue a power failure alarm signal.

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