Intelligent window breaker

Abstract

The utility model relates to the field of automobile safety technology discloses a kind of intelligent window breaker of flexible installation and higher reliability, including the acceleration sensor (110) for detecting the impact signal formed after car is strongly impacted, the detection module (120) for obtaining the abnormal signal formed when automobile appears dangerous situation, main control module (130), window breaking execution module (140) and feedback detection module (150), wherein, feedback detection module (150) is used to receive amplified vibration signal, main control module (130) judges the resonance frequency of window glass according to feedback vibration signal, if detection, then main control module (130) stops output execution signal, if not detected, then adjust the frequency of execution signal, continue window breaking.

Description

Technical Field

[0001] This utility model relates to the field of automotive safety technology, and more specifically, to an intelligent window breaker. Background Technology

[0002] With the increasing popularity of new energy vehicles, power outages often prevent car doors from opening in the event of collisions, fires, or submersion, seriously threatening the lives of passengers. Existing window-breaking devices, such as safety hammers and mechanical strikers, mostly rely on manual operation and are ineffective when the driver is unconscious or unable to move. Furthermore, some automatic window-breaking devices suffer from problems such as large size, inconvenient installation, dependence on vehicle power, and limited triggering conditions, restricting their practical application.

[0003] There are already some automatic window-breaking solutions, such as the "one-click window-breaking" function of the Jike 7X, which relies on manual pulling of the cord to trigger the firing pin; the patent CN116080576A uses an electronic ignition head to drive the tungsten steel head to break the window, but it is an aftermarket product, which is inconvenient to install and easy to fall off; there are also window-breaking solutions based on airbag technology, which rely on the airbag ECU to trigger, and have limited applicability.

[0004] Therefore, there is an urgent need for a smart window breaker that is compact in structure, intelligently triggered, flexibly installed, and does not rely on vehicle power. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an intelligent window breaker that is flexible in installation and has high reliability, addressing the shortcomings of existing automatic window breaking devices, such as large size, inconvenient installation, dependence on vehicle power, and single triggering conditions.

[0006] The technical solution adopted by this utility model to solve its technical problem is: to construct an intelligent window breaker, which has the following features: An accelerometer sensor is used to detect the impact signal generated after a car is hit hard. At least one detection module is distributed and installed in the vehicle's cabin or battery pack to acquire abnormal signals generated when the vehicle is in danger. At least one main control module, whose input terminal is connected to the output terminal of the acceleration sensor and the detection module respectively, is used to acquire the impact signal or the abnormal signal, and output at least one execution signal according to the impact signal or the abnormal signal; At least one window breaking execution module, whose signal input terminal is coupled to the output terminal of the main control module, is used to receive the execution signal, which is used to control the window breaking execution module to perform frequency scanning on the vehicle window glass to match the glass resonant frequency; At least one feedback detection module is used to acquire the vibration signal generated by the window breaking execution module breaking the vehicle window glass, and to amplify the vibration signal. The output of the feedback detection module is connected to another input of the main control module to receive the amplified vibration signal. The main control module determines the resonant frequency of the vehicle window glass based on the feedback vibration signal. If detected, the main control module stops outputting the execution signal. If no detection is detected, adjust the frequency of the execution signal and continue breaking the window.

[0007] In some embodiments, the detection module includes at least two temperature switches configured in the driver's cab, each with preset values. The temperature switch is used to detect the temperature signal inside the cabin. When the temperature signal is less than a preset value, the circuit is in an open state. When the temperature signal exceeds a preset value, the temperature switch automatically closes. The main control module responds by outputting the execution signal to trigger the window breaking execution module to break the car window glass.

[0008] In some embodiments, the detection module includes at least two water immersion switches configured in the driver's cab. When multiple locations inside the driver's cab are simultaneously flooded, and a flooding signal is output, the main control module responds to the flooding signal by outputting an execution signal to trigger the window breaking execution module to break the window glass.

[0009] In some embodiments, the window-breaking execution module includes at least a piezoelectric ceramic actuator and a piezoelectric resonator. The signal input terminal of the piezoelectric ceramic actuator is connected to the signal output terminal of the main control module, and is used to receive the execution signal. The output terminal of the piezoelectric ceramic actuator is connected to the input terminal of the piezoelectric vibrator. According to the input execution signal, a high-voltage drive signal is output to the piezoelectric vibrator to control the piezoelectric vibrator to perform frequency scanning, match the resonant frequency of the glass, and generate mechanical vibration on the car window glass.

[0010] In some embodiments, the window-breaking execution module further includes a resonant network, one end of which is connected to one end of the piezoelectric ceramic actuator. The other end of the resonant network is connected to the other end of the piezoelectric ceramic driver.

[0011] In some embodiments, the resonant network includes a first inductor, a second inductor, and a twenty-eighth capacitor. One end of the first inductor and one end of the second inductor are connected to one end of the piezoelectric ceramic actuator. The other end of the first inductor and one end of the twenty-eighth capacitor are connected to the other end of the piezoelectric ceramic actuator. The other end of the second inductor and the other end of the twenty-eighth capacitor are connected to the common terminal.

[0012] In some embodiments, the feedback detection module includes at least a piezoelectric thin film. The piezoelectric film is attached to the vehicle window glass to detect the vibration signal generated when the piezoelectric vibrator breaks the vehicle window glass.

[0013] In some implementations, the feedback detection module further includes a differential amplifier, an operational amplifier, and a voltage follower. The input terminal of the differential amplifier is connected to the output terminal of the piezoelectric film to receive the vibration signal and suppress common-mode noise. The non-inverting input of the operational amplifier is coupled to the output of the differential amplifier to receive the vibration signal and further amplify it. The inverting input of the operational amplifier is connected to its output via a ninth resistor; The inverting input of the voltage follower is connected to the output of the operational amplifier via a tenth resistor. The output of the voltage follower is connected to another input of the main control module.

[0014] In some implementations, a communication module is also included, the signal terminals of which are connected to the signal terminals of the main control module. The communication module establishes a communication connection with the main control module through an SPI or UART port and sends location and distress information after the window is broken.

[0015] In some embodiments, a power management module is also included, the input of which is connected to the output of an external power source or the battery pack, for converting the input power signal.

[0016] The intelligent window breaker described in this invention includes an acceleration sensor for detecting impact signals generated after a vehicle is subjected to a strong impact, a detection module for acquiring abnormal signals generated when a vehicle is in danger, a main control module, a window breaking execution module, and a feedback detection module. The feedback detection module receives amplified vibration signals. The main control module determines the resonant frequency of the window glass based on the feedback vibration signals. If detected, the main control module stops outputting the execution signal; if not detected, it adjusts the frequency of the execution signal and continues breaking the window. Compared with existing technologies, the automatic detection and triggering of the detection module solves the problem of manual devices such as safety hammers and one-button window breakers failing when the driver is unconscious or unable to move for other reasons, greatly improving the survival rate in extreme accidents. On the other hand, through the closed-loop control of the feedback detection module and the main control module, the system can "sense" whether the window breaking is successful. If the first attempt fails, the system can automatically adjust the frequency (frequency sweep) and try again, ensuring the final execution effect. This is an intelligence that open-loop systems do not possess. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a circuit diagram of an embodiment of an acceleration sensor provided by this utility model; Figure 2 This is a circuit diagram of an embodiment of the detection module provided by this utility model; Figure 3 This is a circuit schematic diagram of an embodiment of the main control module provided by this utility model; Figure 4 This is a circuit diagram of an embodiment of the window-breaking execution module provided by this utility model; Figure 5 This is a circuit diagram of an embodiment of the feedback detection module provided by this utility model; Figure 6 This is a circuit schematic diagram of an embodiment of the power management module provided by this utility model; Figure 7 This is a circuit schematic diagram of an embodiment of the communication module provided by this utility model. Detailed Implementation

[0018] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] like Figures 1-5As shown, in the first embodiment of the intelligent window breaker of this utility model, the intelligent window breaker includes an acceleration sensor 110, at least one detection module 120, at least one main control module 130, at least one window breaking execution module 140, at least one feedback detection module 150, a power management module 160, and a communication module 170. Among them, the acceleration sensor 110 is used to detect whether the vehicle has been subjected to a strong impact and outputs the detected impact signal to the main control module 130; The detection module 120 is used to detect abnormal signals of the current vehicle being in danger and to feed back the abnormal signal to the main control module 130; The main control module 130 has the functions of logical operation, (abnormal signal) signal analysis, and feedback of abnormal signal corresponding output execution signal; The window breaking execution module 140 is used to receive at least one execution signal (PWM or SPI) output by the main control module 130, so as to output a high voltage drive signal to the piezoelectric vibrator (corresponding to P1), so that the piezoelectric vibrator (corresponding to P1) performs frequency scanning, matches the glass resonance frequency, and generates a high frequency (10k~15kHz) vibration signal on the car window glass to break the car window glass. For example, for tempered glass samples of 4 mm / 5 mm / 6 mm, the resonance points (such as 980 Hz, 1.12 kHz, 1.35 kHz). The feedback detection module 150 is used to detect the high-frequency (10k~15kHz) vibration signal when the glass breaks, amplify the vibration signal, and then output it to the main control module 130. The power management module 160 converts the battery voltage to a stable DVDD voltage, providing power to the main control module 130, feedback detection module 150, and communication module 170. Among them, an independent power supply ensures that the system can still work when the vehicle loses power; The communication module 170 has the functions of positioning, SMS and network communication. It establishes communication with the communication module 170 through the SPI or UART port and sends positioning and distress information after the window is broken. Specifically, the acceleration sensor 110 is distributed and installed on the car body. It is used to detect the impact signal formed after the car is hit by a strong impact and to feed back the detected impact signal to the main control module 130. Among them, the accelerometer 110 can detect a maximum acceleration value of 64.5 g. This value is generally the threshold value for high-speed and strong impact. When the detected acceleration is greater than 64.5 g, the main control module 130 can automatically perform the window breaking action according to the impact signal. Specifically, the windows are only broken when a peak impact is detected and the car has returned to a static state, to prevent secondary injuries from broken glass while the car is still in the process of impact. In addition, a battery detection circuit is configured to trigger a battery alarm when the battery level is below 30%. The detection modules 120 are distributed and installed in the vehicle's cabin or battery pack to acquire abnormal signals generated when the vehicle experiences a dangerous situation, and output the acquired abnormal signals to the main control module 130. Abnormal signals could be high temperature (temperature greater than 150°C) or water immersion up to the top of the car window (e.g., above 2 / 3 of the window height). Furthermore, the input terminal of the main control module 130 is connected to the output terminal of the acceleration sensor 110 and the output terminal of the detection module 120 respectively, and is used to receive the impact signal or abnormal signal fed back by the acceleration sensor 110 and the detection module 120 respectively, and respond and output at least one execution signal in a timely manner according to the feedback impact signal or abnormal signal. Furthermore, the signal input terminal of the window breaking execution module 140 is coupled to the output terminal of the main control module 130, and is used to receive the execution signal (PWM or SPI) output by the main control module 130. The input execution signal is used to control the window breaking execution module 140 to work and break the car window glass. Specifically, the feedback detection module 150 is used to acquire the high-frequency (10k~15kHz) vibration signal generated by the window breaking execution module 140 breaking the vehicle window glass, and amplify the acquired vibration signal. Furthermore, the output of the feedback detection module 150 is connected to another input of the main control module 130 to receive the amplified vibration signal. The main control module 130 determines the resonant frequency of the window glass based on the feedback vibration signal. If detected, the main control module 130 stops outputting execution signals to control the window breaking execution module 140 to stop working. If no detection is detected, the frequency of the output execution signal is adjusted to control the window breaking execution module 140 to continue performing the window breaking action.

[0020] Using this technical solution, the acceleration sensor 110 and detection module 120 automatically detect dangers (such as impact, high temperature fire and water immersion) and trigger them, solving the problem of manual devices such as safety hammers and one-button window breakers failing when the driver is unconscious or unable to move for other reasons, greatly improving the chances of survival in extreme accidents. On the other hand, through the closed-loop control of the feedback detection module 150 and the main control module 130, the system can "sense" whether the window breaking is successful. If the first attempt is unsuccessful, the system can automatically adjust the frequency (frequency sweep) and try again, ensuring the final execution effect. This is an intelligence that open-loop systems do not possess.

[0021] In some implementations, such as Figure 2 As shown, in order to ensure the acquisition of temperature signals inside the vehicle, the detection module 120 can be selected as a temperature switch (corresponding to Temp Switch 1-Temp Switch 3). At least two temperature switches are configured in the driver's cab and have preset values ​​(such as 150°C). For example, when any of the temperature switches (corresponding to Temp Switch1-Temp Switch3) reaches a high temperature (such as 150°C), it closes to connect the battery (VBAT) power supply to the circuit; Temperature switches (corresponding to Temp Switch1-Temp Switch3) are used to detect the temperature signal inside the cabin and feed the acquired temperature signal back to the main control module 130; Specifically, when the temperature signal received by the temperature switches (corresponding to Temp Switch 1-Temp Switch 3) is less than a preset value, the circuit is in an open state. When the temperature signal obtained by the temperature switch (corresponding to Temp Switch1-Temp Switch3) is greater than the preset value, the temperature switch (corresponding to Temp Switch1-Temp Switch3) will automatically close and feed back the abnormal signal to the main control module 130; The main control module 130 responds to the feedback abnormal signal and outputs at least one execution signal to trigger the window breaking execution module 140 to work, thereby breaking the car window glass.

[0022] Specifically, the temperature switches (corresponding to Temp Switch1-Temp Switch3) are connected in parallel to the battery (VBAT) and the main control module 130 of the window breaker. Multiple temperature switches are distributed in various locations in the cabin or can be installed inside the battery pack (VBAT) for faster response. When the temperature exceeds 150 degrees, the temperature switch automatically closes the circuit, connecting the battery (VBAT) and the main control module 130, and feeding back the abnormal signal to the main control module 130. Based on the feedback abnormal signal, the main control module 130 outputs at least one execution signal to trigger the window breaking execution module 140 to work, thereby breaking the window glass. When any of the temperature switches (corresponding to Temp Switch1-Temp Switch3) detects a temperature below 150 degrees, the circuit is disconnected. In the disconnected state, the battery (VBAT) does not consume power. Therefore, it only requires 4 dry cell batteries (VBAT) to provide power for a long time in standby mode, and also avoids the loss of power and safety function when the power battery pack (VBAT) catches fire while drawing power from the vehicle body. In some implementations, the detection module 120 can be selected as a normally open water immersion switch. When water immersion is detected in multiple places in the driver's cab at the same time, it can be determined that the car has fallen into the water and the window breaking function will be automatically activated. Specifically, at least two water immersion switches are located in the driver's cab. When multiple locations inside the driver's cab are simultaneously detected to be flooded, and flooding signals are output, the main control module 130 responds to the flooding signals by outputting at least one execution signal to trigger the window breaking execution module 140 to break the window glass.

[0023] It is important to note that the water immersion switch should be installed at a certain height to prevent the window breaker from being triggered when washing the car.

[0024] In some implementations, such as Figure 4 As shown, in order to ensure the reliability of window breaking, a piezoelectric ceramic actuator U2 and a piezoelectric vibrator (corresponding to P1) can be set in the window breaking execution module 140. Among them, the piezoelectric ceramic actuator U2 can output a high-voltage drive signal according to the input execution signal; The piezoelectric vibrator (corresponding to P1) is used to generate high-frequency vibrations to act on the glass to be broken; Specifically, the signal input terminals (corresponding to ADA and SCL) of the piezoelectric ceramic actuator U2 are connected to the signal output terminals (corresponding to ADA and SCL) of the main control module 130, and are used to receive at least one execution signal. Furthermore, the output terminals (corresponding to Xout and Yout) of the piezoelectric ceramic actuator U2 are connected to the input terminals (corresponding to pins 1 and 2) of the piezoelectric vibrator (corresponding to P1) through the first resistor R21 and the second resistor R22. According to the input execution signal, a high-voltage drive signal is output to the piezoelectric vibrator (corresponding to P1) to control the piezoelectric vibrator (corresponding to P1) to perform frequency scanning, match the glass resonant frequency, and generate high-frequency mechanical vibration to act on the car window glass to break the car window glass. By using a piezoelectric oscillator (corresponding to P1) to generate high-frequency vibrations, the glass structure is broken from the inside through the principle of "resonance" rather than by traditional mechanical impact or explosion. This method has high energy efficiency, requires less power, is safer for surrounding structures and people, and is easy to miniaturize.

[0025] In some implementations, such as Figure 4 As shown, in order to ensure the stability of the output resonant efficiency, the window breaking execution module 140 also includes a resonant network, which can convert DC power into high-frequency AC power and provide a high-quality input waveform for the piezoelectric ceramic driver U2; One end of the resonant network is connected to one end of the piezoelectric ceramic actuator U2. The other end of the resonant network (corresponding to HV) is connected to the other end of the piezoelectric ceramic driver U2 (corresponding to HV). The working condition of the piezoelectric oscillator (corresponding to P1) is detected in real time through the resonant network, and the resonant parameters are dynamically adjusted to ensure that the piezoelectric ceramic driver U2 is always in the best working state and achieve high resonant efficiency.

[0026] In some implementations, such as Figure 4 As shown, to improve the reliability of the output resonant efficiency, a first inductor L1, a second inductor L2, and a twenty-eighth capacitor C28 can be set in the resonant network. One end of the first inductor L1 and one end of the second inductor L2 are connected to one end of the piezoelectric ceramic actuator U2. The other end of the first inductor L1 and one end of the twenty-eighth capacitor C28 are connected to the other end (corresponding to HV) of the piezoelectric ceramic driver U2 through the fourth resistor R27. The other end of the second inductor L2 and the other end of the twenty-eighth capacitor C28 are connected to the common terminal. The first inductor L1, the second inductor L2 and the twenty-eighth capacitor C28 generate a signal of a specific frequency, which is input to the piezoelectric ceramic driver U2.

[0027] In some implementations, such as Figure 5 As shown, in order to obtain reliable vibration signals, at least one piezoelectric film (corresponding to P2) can be set in the feedback detection module 150, which is attached to the glass of the car window to detect high-frequency (10k~15kHz) vibration signals when the glass breaks. Specifically, a piezoelectric film (corresponding to P2) is attached to the car window glass. It is used to detect the high-frequency (10k~15kHz) vibration signal generated when the piezoelectric vibrator (corresponding to P1) breaks the car window glass, and outputs the vibration signal to the subsequent circuit (such as differential amplifier AR1).

[0028] In some implementations, such as Figure 5 As shown, to ensure the reliability of the vibration signal, the feedback detection module 150 may also include a differential amplifier AR1, an operational amplifier AR2, and a voltage follower AR3. Among them, differential amplifier AR1 is used for differential amplification and common-mode noise suppression; Operational amplifier AR2 is used to further amplify the signal input to differential amplifier AR1; The voltage follower AR3 is used to enhance the load capacity and output the amplified signal to the ADC pin of the main control module 130; Specifically, the input terminals (corresponding to pins 2 and 3) of the differential amplifier AR1 are connected to the output terminals (corresponding to pins 1 and 2) of the piezoelectric film (corresponding to P2) to receive the vibration signal input from the piezoelectric film (corresponding to P2), suppress common-mode noise of the input vibration signal, and then output it to the operational amplifier AR2. Furthermore, the non-inverting input (pin 3) of operational amplifier AR2 is connected to the output (pin 6) of differential amplifier AR1 via resistor R42 to receive the vibration signal, further amplify the input vibration signal, and then output it to voltage follower AR3. The inverting input (pin 2) of operational amplifier AR2 is connected to its output (pin 6) through the ninth resistor R44. The ninth resistor R44 is a negative feedback resistor, and the signal at the output (pin 6) of operational amplifier AR2 is fed back to the inverting input (pin 2) of operational amplifier AR2 through the ninth resistor R44. Furthermore, the inverting input (pin 2) of voltage follower AR3 is connected to the output (pin 6) of operational amplifier AR2 via resistor R45, and is used to receive the signal amplified by operational amplifier AR2; The output terminal (corresponding to pin 6) of voltage follower AR3 is connected to another input terminal (corresponding to pin 13) of main control module 130 through resistor 11 R46, and outputs the processed vibration signal to main control module 130, which can output at least one execution signal according to the input vibration signal.

[0029] In some implementations, such as Figure 7 As shown, it also includes a communication module 170, wherein the signal terminals of the communication module 170 are connected to the signal terminals of the main control module 130, and establish a communication connection with the main control module 130 through the SPI or UART port, and send location and distress information after the window is broken.

[0030] In some implementations, such as Figure 7 As shown, it also includes a power management module 160, wherein the input terminal (corresponding to pin 1) of the power management module 160 is connected to the output terminal (corresponding to VIN) of the external power supply or the output terminal (corresponding to VBAT) of the battery pack, and is used to convert the input power signal and output the DVDD voltage signal to provide working power for the feedback detection module 150 and the main control module 130.

[0031] In some implementations, such as Figure 5As shown, it also includes a power detection circuit, which includes a 51st resistor R51 and a 52nd resistor R52 connected in series. One end of the 51st resistor R51 is connected to the power supply terminal (VIN), and the connection ends of the 51st resistor R51 and the 52nd resistor R52 are connected to one end of the main control module 130 (corresponding to pin 13). By detecting the sampling resistor through the ADC, when the battery (VBAT) voltage drops and is lower than the preset value built into the main control module 130, the main control module 130 can remind the user to replace the battery (VBAT) based on the feedback voltage signal.

[0032] Working principle of window breaker Standby mode: When the accelerometer 110 / temperature switch / water immersion switch is disconnected, the system is powered off, and only the battery is in standby mode, consuming almost no power. Triggered state: When the accelerometer 110 detects an impact with an acceleration greater than 64.5G, it assumes that a strong impact has occurred. When the acceleration value decreases to zero after reaching its peak, the automatic window breaking function will be activated. When the interior temperature exceeds 150℃ or water immersion is detected, the temperature / water immersion switch closes and the system powers on. For example, when water is detected in multiple places in the driver's cab at the same time, it can be determined that the car has fallen into the water and the window breaking function will be activated automatically. Once the battery is connected to the window breaker circuit, the main control module 130 in the window breaker circuit drives the pressure ceramic to perform frequency sweeping, targeting 4 mm / 5 mm / 6 mm tempered glass samples, and the resonance points (such as 980 Hz, 1.12 kHz, 1.35 kHz). When the main control module 130 starts, it outputs at least one execution signal to control the piezoelectric ceramic driver U2 to drive the piezoelectric vibrator (corresponding to P1) to output a high-frequency vibration signal, which acts on the glass. Closed-loop broken window control: The piezoelectric film (corresponding to P2) detects the high-frequency sound wave (10k~15kHz) vibration signal generated when the glass breaks to achieve frequency locking. After being amplified and filtered by differential amplifier AR1, operational amplifier AR2 and voltage follower AR3, it is sent to the main control module 130 and automatically adjusted to the most matching resonance frequency to achieve the window breaking effect. The main control module 130 determines whether the characteristic frequency of glass breakage (10k~15kHz) has been detected: If detected, stop the driver; If no detection is detected, adjust the frequency to continue breaking windows.

[0033] Alarms and Communication: After the window is broken, the main control module 130 sends a location and distress message to a preset number via the communication module 170.

[0034] Because the power supply is triggered by a temperature switch circuit, the control circuit can be set to a setting mode by pressing a button. When the button is connected to the power supply, the output of the window breaker will be disconnected. Therefore, the window breaker will not be triggered when the setting mode is entered. The setting mode can set a remote rescue call and location sending mechanism. After the setting is completed, when the window is automatically triggered in case of danger, the current location information and a call for rescue will be sent to the set mobile phone number. The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A smart window breaker, characterized in that, have: An accelerometer sensor is used to detect the impact signal generated after a car is hit hard. At least one detection module is distributed and installed in the vehicle's cabin or battery pack to acquire abnormal signals generated when the vehicle is in danger. At least one main control module, whose input terminal is connected to the output terminal of the acceleration sensor and the detection module respectively, is used to acquire the impact signal or the abnormal signal, and output at least one execution signal according to the impact signal or the abnormal signal; At least one window breaking execution module, whose signal input terminal is coupled to the output terminal of the main control module, is used to receive the execution signal, which is used to control the window breaking execution module to perform frequency scanning on the vehicle window glass to match the glass resonant frequency; At least one feedback detection module is used to acquire the vibration signal generated by the window breaking execution module breaking the vehicle window glass, and to amplify the vibration signal. The output of the feedback detection module is connected to another input of the main control module to receive the amplified vibration signal. The main control module determines the resonant frequency of the vehicle window glass based on the feedback vibration signal. If detected, the main control module stops outputting the execution signal. If no detection is detected, adjust the frequency of the execution signal and continue breaking the window.

2. The intelligent window breaker according to claim 1, characterized in that, The detection module includes at least two temperature switches configured in the driver's cab, each with preset values. The temperature switch is used to detect the temperature signal inside the cabin. When the temperature signal is less than a preset value, the circuit is in an open state. When the temperature signal exceeds a preset value, the temperature switch automatically closes. The main control module responds by outputting the execution signal to trigger the window breaking execution module to break the car window glass.

3. The intelligent window breaker according to claim 1, characterized in that, The detection module includes at least two water immersion switches, which are configured in the driver's cab. When multiple locations inside the driver's cabin are simultaneously flooded, and a flooding signal is output, the main control module responds to the flooding signal by outputting an execution signal to trigger the window breaking execution module to break the window glass.

4. The intelligent window breaker according to claim 2 or 3, characterized in that, The window-breaking execution module includes at least a piezoelectric ceramic actuator and a piezoelectric vibrator. The signal input terminal of the piezoelectric ceramic actuator is connected to the signal output terminal of the main control module, and is used to receive the execution signal. The output terminal of the piezoelectric ceramic actuator is connected to the input terminal of the piezoelectric vibrator. According to the input execution signal, a high-voltage drive signal is output to the piezoelectric vibrator to control the piezoelectric vibrator to perform frequency scanning, match the resonant frequency of the glass, and generate mechanical vibration on the car window glass.

5. The intelligent window breaker according to claim 4, characterized in that, The window-breaking execution module also includes a resonant network, one end of which is connected to one end of the piezoelectric ceramic actuator. The other end of the resonant network is connected to the other end of the piezoelectric ceramic driver.

6. The intelligent window breaker according to claim 5, characterized in that, The resonant network includes a first inductor, a second inductor, and a twenty-eighth capacitor. One end of the first inductor and one end of the second inductor are connected to one end of the piezoelectric ceramic actuator. The other end of the first inductor and one end of the twenty-eighth capacitor are connected to the other end of the piezoelectric ceramic actuator. The other end of the second inductor and the other end of the twenty-eighth capacitor are connected to the common terminal.

7. The intelligent window breaker according to claim 4, characterized in that, The feedback detection module includes at least one piezoelectric thin film. The piezoelectric film is attached to the vehicle window glass to detect the vibration signal generated when the piezoelectric vibrator breaks the vehicle window glass.

8. The intelligent window breaker according to claim 7, characterized in that, The feedback detection module also includes a differential amplifier, an operational amplifier, and a voltage follower. The input terminal of the differential amplifier is connected to the output terminal of the piezoelectric film to receive the vibration signal and suppress common-mode noise. The non-inverting input of the operational amplifier is coupled to the output of the differential amplifier to receive the vibration signal and further amplify it. The inverting input of the operational amplifier is connected to its output via a ninth resistor; The inverting input of the voltage follower is connected to the output of the operational amplifier via a tenth resistor. The output of the voltage follower is connected to another input of the main control module.

9. The intelligent window breaker according to any one of claims 1-8, characterized in that, It also includes a communication module, whose signal terminals are connected to the signal terminals of the main control module. The communication module establishes a communication connection with the main control module through an SPI or UART port and sends location and distress information after the window is broken.

10. The intelligent window breaker according to any one of claims 1-8, characterized in that, It also includes a power management module, the input of which is connected to the output of an external power source or the battery pack, for converting the input power signal.

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