Automobile data recorder and positioning method

Abstract

The invention discloses an automobile data recorder and a positioning method, the automobile data recorder comprises a Bluetooth main control chip, a motion detection module and a buzzer module, and the motion detection module and the buzzer module are respectively connected with the Bluetooth main control chip. According to the automobile data recorder, the Apple Findmy technology is applied to the automobile data recorder, and even if the automobile data recorder is not provided with a GPS module, Apple equipment around the automobile data recorder can be used for assisting positioning of the automobile data recorder. According to the automobile data recorder, the positioning precision of the automobile data recorder is improved through low production cost.

Description

Technical Field

[0001] The present invention relates to the technical field of driving recorders, and particularly to a driving recorder and a positioning method based on Find My. Background Art

[0002] Traditional driving recorders are used to record video images and sounds of the entire process of vehicle driving, which can provide evidence for traffic accidents. However, traditional driving recorders rarely have a positioning function. Driving recorders with a positioning function all achieve the positioning function through a GPS module combined with a 4G network. The manufacturing cost of the device will be relatively high, and its supporting power system and functional architecture will be relatively complex, resulting in low production convenience. In addition, the technical solutions adopted in the prior art have disadvantages such as being vulnerable to interference, having a high false alarm rate, and inaccurate positioning in the case of weak signals. Summary of the Invention

[0003] The main object of the present invention is to propose a driving recorder and a search method, aiming to improve the positioning accuracy of the driving recorder with a relatively low production cost.

[0004] To achieve the above object, the present invention provides a driving recorder, which includes a Bluetooth main control chip, a motion detection module, and a buzzer module. The motion detection module and the buzzer module are respectively connected to the Bluetooth main control chip;

[0005] The Bluetooth main control chip is used to transmit a Bluetooth signal to a smart terminal in the Find My network at a preset time interval, or when receiving a search and positioning instruction issued by the smart terminal, send a Bluetooth signal to the smart terminal according to the search and positioning instruction, and send the search and positioning instruction to the buzzer module. The Bluetooth signal includes the identity identification information and the current position information of the driving recorder;

[0006] The motion detection module includes an acceleration sensor, which is used to detect the motion state and direction change information of the driving recorder. When the driving recorder moves or is impacted, the acceleration sensor will sense the corresponding acceleration change and feed the acceleration change data back to the Bluetooth main control chip. The Bluetooth main control chip judges whether the driving recorder is accidentally moved or impacted according to the acceleration change data and uploads it to the smart terminal; the acceleration sensor is also used to wake up the Bluetooth main control chip when the driving recorder is lost, broadcast data to a smart terminal in the external Find My network through the Bluetooth main control chip, and send the identity identification information and the current position information of the driving recorder to the smart terminal in the Find My network;

[0007] The buzzer module is used to give an alarm prompt when receiving the search and positioning instruction.

[0008] A further technical solution of the present invention is that the Bluetooth master chip uses the HB0G26B chip.

[0009] A further technical solution of the present invention is that the motion detection module includes chip U3, resistor R28, resistor R29, capacitor C7 and capacitor C8. One end of resistor R28 is connected to one end of resistor R29 and pin 24 of the Bluetooth master chip. The other end of resistor R29 is connected to pin 12 of chip U3 and pin 10 of the Bluetooth master chip. The other end of resistor R28 is connected to pin 2 of chip U3 and pin 11 of the Bluetooth master chip. One end of capacitor C8 is connected to pin 3 of chip U3 and pin 24 of the Bluetooth master chip. The other end of capacitor C8 is grounded. One end of capacitor C7 is connected to pin 7 of chip U3 and pin 24 of the Bluetooth master chip. The other end of capacitor C7 is grounded.

[0010] A further technical solution of the present invention is that the buzzer module includes resistor R6, resistor R7, diode D1 and MOS transistor Q2. One end of resistor R6 is connected to pin 17 of the Bluetooth master chip. The other end of resistor R6 is connected to one end of resistor R7 and the base of MOS transistor Q2. The other end of resistor R7 is connected to the emitter of MOS transistor Q2 and is grounded. The anode of diode D1 is connected to the collector of MOS transistor Q2. The pin D1 of diode D1 is connected to pin 24 of the Bluetooth master chip.

[0011] A further technical solution of the present invention is that the driving recorder further includes a key module, and pin P10 of the key module is connected to the anode of diode D1 and the collector of MOS transistor Q2.

[0012] A further technical solution of the present invention is that the peripheral circuit of the Bluetooth master chip includes capacitor C13 and capacitor C14. One end of capacitor C13 is connected to one end of capacitor C14, pin 24 of the Bluetooth master chip and the power supply. The other end of capacitor C13 and the other end of capacitor C14 are commonly grounded.

[0013] A further technical solution of the present invention is that the peripheral circuit of the Bluetooth main control chip further includes a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18 and an inductor L1. One end of the capacitor C15 and one end of the capacitor C16 are connected to the pin 27 of the Bluetooth main control chip. The other end of the capacitor C15 and the other end of the capacitor C16 are commonly grounded. One end of the capacitor C17 is connected to one end of the capacitor C18, one end of the inductor L1 and the pin 26 of the Bluetooth main control chip. The other end of the inductor L1 is connected to the pin 25 of the Bluetooth main control chip. The other end of the capacitor C17 and the other end of the capacitor C18 are commonly grounded.

[0014] A further technical solution of the present invention is that the peripheral circuit of the Bluetooth main control chip further includes a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C12, an inductor L2, an inductor L3 and an antenna ANT1. One end of the inductor L2 is connected to one end of the capacitor C12 and the pin 9 of the Bluetooth main control chip. The other end of the inductor L2 is connected to one end of the inductor L3 and one end of the capacitor C5. The other end of the inductor L3 is connected to one end of the capacitor C4, one end of the capacitor C3 and the antenna ANT1. The other ends of the capacitor C3, the capacitor C4, the capacitor C5 and the capacitor C12 are commonly grounded.

[0015] To achieve the above object, the present invention also proposes a positioning method for a driving recorder. The method is applied to the driving recorder described above. The method includes the following steps:

[0016] Step S10, pairing the driving recorder with a smart terminal in the Find My network;

[0017] Step S20, after successful pairing, the Bluetooth main control chip transmits a Bluetooth signal to the smart terminal in the Find My network at a preset time interval, or when receiving a search and positioning instruction issued by the smart terminal, sends a Bluetooth signal to the smart terminal according to the search and positioning instruction, and sends the search and positioning instruction to the buzzer module. The Bluetooth signal includes the identity identification information and the current location information of the driving recorder;

[0018] Step S30: The acceleration sensor detects the motion state and direction change information of the driving recorder. When the driving recorder moves or is impacted, the acceleration sensor will sense the corresponding acceleration change and feed the acceleration change data back to the Bluetooth main control chip. The Bluetooth main control chip determines whether the driving recorder has been accidentally moved or impacted based on the acceleration change data and uploads it to the smart terminal. Alternatively, when the driving recorder is lost, the acceleration sensor wakes up the Bluetooth main control chip, and the Bluetooth main control chip broadcasts data to the smart terminals in the Find My network, sending the identity recognition information and current location information of the driving recorder to the smart terminals in the Find My network.

[0019] Step S40: The buzzer module gives an alarm prompt when receiving the search and positioning instruction.

[0020] A further technical solution of the present invention is that in step S20, when the Bluetooth main control chip receives the search and positioning instruction sent by the smart terminal, the steps of sending a Bluetooth signal to the smart terminal according to the search and positioning instruction and sending the search and positioning instruction to the buzzer module include:

[0021] When the Bluetooth main control chip receives the search and positioning instruction sent by the Apple device, it transmits the identity recognition information and current location information to the Apple device. The Apple device uploads the identity recognition information and current location information to the iCloud server and finally feeds back the positioning information to the user's Apple device.

[0022] The beneficial effects of the driving recorder and positioning method of the present invention are:

[0023] Through the above technical solutions, the present invention includes a Bluetooth main control chip, a motion detection module, and a buzzer module. The motion detection module and the buzzer module are respectively connected to the Bluetooth main control chip. The Bluetooth main control chip is used to transmit Bluetooth signals to intelligent terminals in the Find My network at preset time intervals, or when receiving a search and positioning instruction sent by the intelligent terminal, send Bluetooth signals to the intelligent terminal according to the search and positioning instruction, and send the search and positioning instruction to the buzzer module. The Bluetooth signals include the identity identification information and current location information of the driving recorder. The motion detection module includes an acceleration sensor, which is used to detect the motion state and direction change information of the driving recorder. When the driving recorder moves or is impacted, the acceleration sensor will sense the corresponding acceleration change and feedback the acceleration change data to the Bluetooth main control chip. The Bluetooth main control chip judges whether the driving recorder has been accidentally moved or impacted according to the acceleration change data and uploads it to the intelligent terminal. The acceleration sensor is also used to wake up the Bluetooth main control chip when the driving recorder is lost, broadcast data to intelligent terminals in the external Find My network through the Bluetooth main control chip, and send the identity identification information and current location information of the driving recorder to intelligent terminals in the Find My network. The buzzer module is used to give an alarm prompt when receiving the search and positioning instruction, achieving the improvement of the positioning accuracy of the driving recorder with a relatively low production cost. Brief Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0025] Figure 1 It is the design block diagram of the Find My module;

[0026] Figure 2 It is the circuit structure schematic diagram of the Bluetooth main control chip in the driving recorder of the present invention;

[0027] Figure 3 It is the circuit structure schematic diagram of the motion detection module;

[0028] Figure 4 It is the circuit structure schematic diagram of the buzzer module;

[0029] Figure 5 It is the circuit structure schematic diagram of the button module;

[0030] Figure 6 It is a schematic flowchart of the positioning method of the driving recorder of the present invention.

[0031] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0033] Considering that the manufacturing cost of the current driving recorder is relatively high, and its supporting power supply system and functional architecture are relatively complex, and the production convenience is relatively low. In addition, the positioning technical solutions adopted in the prior art have disadvantages such as being easily interfered, having a high false alarm rate, and inaccurate positioning in the case of weak signals. The present invention proposes a solution.

[0034] Specifically, the present invention proposes a driving recorder. The technical solution adopted by the present invention is mainly to apply the Apple Find My technology to the driving recorder. Find My is an application technology released by Apple. Even if it does not have a GPS module itself, it can use the surrounding Apple devices (iPhone, iPad, AirPods, AirTag, etc.) to help it locate. The design block diagram of Find My is as Figure 1 shown.

[0035] A preferred embodiment of the driving recorder of the present invention includes a Bluetooth main control chip, a motion detection module and a buzzer module, and the motion detection module and the buzzer module are respectively connected to the Bluetooth main control chip.

[0036] Among them, the Bluetooth main control chip is used to transmit Bluetooth signals to the smart terminal in the Find My network at a preset time interval, or when receiving the search and positioning instruction sent by the smart terminal, send Bluetooth signals to the smart terminal according to the search and positioning instruction, and send the search and positioning instruction to the buzzer module. The Bluetooth signal includes the identity identification information and the current position information of the driving recorder. The smart terminal is a smart terminal with the Find My function, such as Apple devices (iPhone, iPad, AirPods, AirTag, etc.).

[0037] The motion detection module includes an acceleration sensor, which is used to detect the motion state and direction change information of the dash cam. When the dash cam moves or is impacted, the acceleration sensor will sense the corresponding acceleration change and feed the acceleration change data back to the Bluetooth main control chip. The Bluetooth main control chip will judge whether the dash cam has been accidentally moved or impacted according to the acceleration change data and upload it to the smart terminal. The acceleration sensor is also used to wake up the Bluetooth main control chip when the dash cam is lost, broadcast data to the smart terminals in the Find My network through the Bluetooth main control chip, and send the identity recognition information and current location information of the dash cam to the smart terminals in the Find My network.

[0038] The buzzer module is used to give an alarm prompt when receiving the search and positioning instruction.

[0039] In this embodiment, the Bluetooth main control chip adopts the HB0G26B chip.

[0040] In this embodiment, the peripheral circuit of the Bluetooth main control HB0G26B chip of the dash cam Find My module is simple. As Figure 2 shown, it is a SOC chip for Bluetooth low energy and proprietary 2.4GHz applications. It integrates a high-performance and low-power radio frequency transceiver, with a Bluetooth baseband and rich peripheral IO expansion.

[0041] When the dash cam is working, the Bluetooth main control chip will transmit Bluetooth signals at regular time intervals. The signals contain the identity recognition information of the device, etc. After receiving this signal, surrounding Apple devices or other devices that support the Find My network and have the corresponding function enabled can identify the existence of this Find My product.

[0042] When the user searches for a lost Find My product through the Find My application on the Apple device, the search and positioning instruction will be transmitted through the Bluetooth network. After receiving the search instruction from the nearby Apple device, the Bluetooth main control chip will transmit the data such as the stored location information by itself to the Apple device through Bluetooth, and then the Apple device will upload the data to the iCloud server, and finally feedback the positioning information to the user APP to help the user determine the approximate location of the product.

[0043] Please refer to Figure 3 , in this embodiment, the motion detection module includes an acceleration sensor (G-sensor) and its peripheral circuit.

[0044] The G-sensor can detect the motion state and direction changes of the dash cam. When the product moves or is impacted, the acceleration sensor will sense the corresponding acceleration changes and feed the data back to the Bluetooth main control chip. The Bluetooth main control chip can judge whether the product has been accidentally moved or dropped based on this data. When the dash cam Find My is lost, the G-sensor can be used to wake up the Bluetooth main control chip, so that the Bluetooth main control chip broadcasts data externally. When there are Apple devices nearby, the broadcast data will be received and uploaded to the Apple server, enabling the paired mobile phone to obtain the specific location information of the dash cam Find My module. The more Apple devices are nearby, the more accurate the positioning will be.

[0045] The motion detection module includes chip U3, resistor R28, resistor R29, capacitor C7, and capacitor C8. One end of resistor R28 is connected to one end of resistor R29 and pin 24 of the Bluetooth main control chip. The other end of resistor R29 is connected to pin 12 of chip U3 and pin 10 of the Bluetooth main control chip. The other end of resistor R28 is connected to pin 2 of chip U3 and pin 11 of the Bluetooth main control chip. One end of capacitor C8 is connected to pin 3 of chip U3 and pin 24 of the Bluetooth main control chip. The other end of capacitor C8 is grounded. One end of capacitor C7 is connected to pin 7 of chip U3 and pin 24 of the Bluetooth main control chip. The other end of capacitor C7 is grounded. Chip U3 is compatible with SC7A20E.

[0046] Please refer to Figure 4 , in this embodiment, the buzzer module is driven by a triode. When the dash cam Find My is lost and has been located within this range by nearby Apple devices, the Find My module can then be controlled by the Apple device to emit a beep, so as to quickly find the dash cam.

[0047] Specifically, the buzzer module includes resistor R6, resistor R7, diode D1, and MOS transistor Q2. One end of resistor R6 is connected to pin 17 of the Bluetooth main control chip. The other end of resistor R6 is connected to one end of resistor R7 and the base of MOS transistor Q2. The other end of resistor R7 is connected to the emitter of MOS transistor Q2 and is grounded. The anode of diode D1 is connected to the collector of MOS transistor Q2. The pin D1 of diode D1 is connected to pin 24 of the Bluetooth main control chip.

[0048] Furthermore, please refer to Figure 5 , in this embodiment, the dash cam further includes a key module. The pin P10 of the key module is connected to the anode of diode D1 and the collector of MOS transistor Q2.

[0049] In this embodiment, the Find My module of the driving recorder has one button, and the button is effective at low level. When a beep sound is heard after pressing the button for a long time, it indicates that the module is powered on; when two beep sounds are heard after pressing the button for a long time, it indicates that the module is in the search mode; when three beep sounds are heard after pressing the button for a long time, it indicates that the module is powered off. The external IO of the module is as follows Figure 5 as shown

[0050] Further, please refer to Figure 2 In this embodiment, the peripheral circuit of the Bluetooth main control chip includes a capacitor C13 and a capacitor C14. One end of the capacitor C13 is connected to one end of the capacitor C14, pin 24 of the Bluetooth main control chip, and the power supply. The other end of the capacitor C13 and the other end of the capacitor C14 are commonly grounded

[0051] The peripheral circuit of the Bluetooth main control chip further includes a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18, and an inductor L1. One end of the capacitor C15 and one end of the capacitor C16 are connected to pin 27 of the Bluetooth main control chip. The other end of the capacitor C15 and the other end of the capacitor C16 are commonly grounded. One end of the capacitor C17 is connected to one end of the capacitor C18, one end of the inductor L1, and pin 26 of the Bluetooth main control chip. The other end of the inductor L1 is connected to pin 25 of the Bluetooth main control chip. The other end of the capacitor C17 and the other end of the capacitor C18 are commonly grounded

[0052] The peripheral circuit of the Bluetooth main control chip further includes a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C12, an inductor L2, an inductor L3, and an antenna ANT1. One end of the inductor L2 is connected to one end of the capacitor C12 and pin 9 of the Bluetooth main control chip. The other end of the inductor L2 is connected to one end of the inductor L3 and one end of the capacitor C5. The other end of the inductor L3 is connected to one end of the capacitor C4, one end of the capacitor C3, and the antenna ANT1. The other ends of the capacitor C3, the capacitor C4, the capacitor C5, and the capacitor C12 are commonly grounded

[0053] The beneficial effects of the driving recorder of the present invention are

[0054] Through the above technical solutions, the present invention includes a Bluetooth master chip, a motion detection module, and a buzzer module. The motion detection module and the buzzer module are respectively connected to the Bluetooth master chip. The Bluetooth master chip is configured to transmit Bluetooth signals to a smart terminal in the Find My network at a preset time interval, or when receiving a search and positioning instruction issued by the smart terminal, send Bluetooth signals to the smart terminal according to the search and positioning instruction, and send the search and positioning instruction to the buzzer module. The Bluetooth signals include the identity identification information and the current location information of the dash cam. The motion detection module includes an acceleration sensor, which is used to detect the motion state and direction change information of the dash cam. When the dash cam moves or is impacted, the acceleration sensor will sense the corresponding acceleration change and feed the acceleration change data back to the Bluetooth master chip. The Bluetooth master chip determines whether the dash cam has been accidentally moved or impacted according to the acceleration change data and uploads it to the smart terminal. The acceleration sensor is also used to wake up the Bluetooth master chip when the dash cam is lost, broadcast data to the smart terminal in the external Find My network through the Bluetooth master chip, and send the identity identification information and the current location information of the dash cam to the smart terminal in the Find My network. The buzzer module is used to give an alarm prompt when receiving the search and positioning instruction, achieving the improvement of the positioning accuracy of the dash cam with a relatively low production cost.

[0055] To achieve the above object, the present invention also proposes a method for positioning a dash cam. The method is applied to the dash cam as described above. The structure and working principle of the dash cam have been elaborated in detail above and will not be repeated here.

[0056] As Figure 6 shown, the method includes the following steps:

[0057] Step S10, pair the dash cam with a smart terminal in the Find My network.

[0058] Step S20, after successful pairing, the Bluetooth master chip transmits Bluetooth signals to a smart terminal in the Find My network at a preset time interval, or when receiving a search and positioning instruction issued by the smart terminal, sends Bluetooth signals to the smart terminal according to the search and positioning instruction, and sends the search and positioning instruction to the buzzer module. The Bluetooth signals include the identity identification information and the current location information of the dash cam.

[0059] Step S30: The acceleration sensor detects the motion state and direction change information of the driving recorder. When the driving recorder moves or is impacted, the acceleration sensor will sense the corresponding acceleration change and feed the acceleration change data back to the Bluetooth main control chip. The Bluetooth main control chip determines whether the driving recorder has been accidentally moved or impacted based on the acceleration change data and uploads it to the smart terminal. Alternatively, when the driving recorder is lost, the acceleration sensor wakes up the Bluetooth main control chip, and the Bluetooth main control chip broadcasts data to the smart terminals in the Find My network, sending the identity identification information and current location information of the driving recorder to the smart terminals in the Find My network.

[0060] Step S40: The buzzer module gives an alarm prompt when receiving the search and positioning instruction.

[0061] Further, in step S20, when the Bluetooth main control chip receives the search and positioning instruction issued by the smart terminal, the steps of sending a Bluetooth signal to the smart terminal according to the search and positioning instruction and sending the search and positioning instruction to the buzzer module include:

[0062] When the Bluetooth main control chip receives the search and positioning instruction issued by the Apple device, it transmits the identity identification information and current location information to the Apple device. The Apple device uploads the identity identification information and current location information to the iCloud server and finally feeds back the positioning information to the user's Apple device.

[0063] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A driving recorder, characterized in that: The driving recorder includes a Bluetooth main control chip, a motion detection module and a buzzer module, and the motion detection module and the buzzer module are respectively connected to the Bluetooth main control chip; The Bluetooth main control chip is used to transmit a Bluetooth signal to a smart terminal in the Find My network at a preset time interval, or when receiving a search and positioning instruction issued by the smart terminal, send a Bluetooth signal to the smart terminal according to the search and positioning instruction, and send the search and positioning instruction to the buzzer module, and the Bluetooth signal includes the identity identification information and current location information of the driving recorder; The motion detection module includes an acceleration sensor, which is used to detect the motion state and direction change information of the driving recorder. When the driving recorder moves or is hit, the acceleration sensor will sense the corresponding acceleration change and feed back the acceleration change data to the Bluetooth main control chip. The Bluetooth main control chip determines whether the driving recorder is accidentally moved or hit based on the acceleration change data, and uploads it to the smart terminal; the acceleration sensor is also used to wake up the Bluetooth main control chip when the driving recorder is lost, broadcast data to the smart terminal in the external Find My network through the Bluetooth main control chip, and send the identity information and current location information of the driving recorder to the smart terminal in the Find My network; The buzzer module is used to issue an alarm prompt when receiving the search and positioning instruction.

2. The driving recorder according to claim 1, characterized in that: The Bluetooth main control chip adopts HB0G26B chip.

3. The driving recorder according to claim 2, characterized in that: The motion detection module includes a chip U3, a resistor R28, a resistor R29, a capacitor C7 and a capacitor C8, one end of the resistor R28 is connected to one end of the resistor R29 and pin 24 of the Bluetooth main control chip, the other end of the resistor R29 is connected to pin 12 of the chip U3 and pin 10 of the Bluetooth main control chip, the other end of the resistor R28 is connected to pin 2 of the chip U3 and pin 11 of the Bluetooth main control chip, one end of the capacitor C8 is connected to pin 3 of the chip U3 and pin 24 of the Bluetooth main control chip, the other end of the capacitor C8 is grounded, one end of the capacitor C7 is connected to pin 7 of the chip U3 and pin 24 of the Bluetooth main control chip, and the other end of the capacitor C7 is grounded.

4. The driving recorder according to claim 3, characterized in that: The buzzer module includes a resistor R6, a resistor R7, a diode D1 and a MOS tube Q2, one end of the resistor R6 is connected to pin 17 of the Bluetooth main control chip, the other end of the resistor R6 is connected to one end of the resistor R7 and the base of the MOS tube Q2, the other end of the resistor R7 is connected to the emitter of the MOS tube Q2 and grounded, the anode of the diode D1 is connected to the collector of the MOS tube Q2, and the pin D1 of the diode D1 is connected to pin 24 of the Bluetooth main control chip.

5. The driving recorder according to claim 4, characterized in that: The driving recorder further includes a key module, and a pin P10 of the key module is connected to the anode of the diode D1 and the collector of the MOS tube Q2.

6. The driving recorder according to claim 2, characterized in that: The peripheral circuit of the Bluetooth main control chip includes a capacitor C13 and a capacitor C14, one end of the capacitor C13 is connected to one end of the capacitor C14, a pin 24 of the Bluetooth main control chip and a power supply, and the other end of the capacitor C13 and the other end of the capacitor C14 are grounded.

7. The driving recorder according to claim 6, characterized in that: The peripheral circuit of the Bluetooth main control chip also includes capacitor C15, capacitor C16, capacitor C17, capacitor C18 and inductor L1. One end of the capacitor C15 and one end of the capacitor C16 are connected to pin 27 of the Bluetooth main control chip, the other end of the capacitor C15 and the other end of the capacitor C16 are grounded, one end of the capacitor C17 is connected to one end of the capacitor C18, one end of the inductor L1 and pin 26 of the Bluetooth main control chip, the other end of the inductor L1 is connected to pin 25 of the Bluetooth main control chip, and the other end of the capacitor C17 and the other end of the capacitor C18 are grounded.

8. The driving recorder according to claim 7, characterized in that: The peripheral circuit of the Bluetooth main control chip also includes capacitor C3, capacitor C4, capacitor C5, capacitor C12, inductor L2, inductor L3 and antenna ANT1. One end of the inductor L2 is connected to one end of the capacitor C12 and pin 9 of the Bluetooth main control chip, the other end of the inductor L2 is connected to one end of the inductor L3 and one end of the capacitor C5, the other end of the inductor L3 is connected to one end of the capacitor C4, one end of the capacitor C3 and the antenna ANT1, and the other ends of the capacitor C3, capacitor C4, capacitor C5 and capacitor C12 are grounded in common.

9. A driving recorder positioning method, characterized in that: The method is applied to the driving recorder according to any one of claims 1 to 8, and the method comprises the following steps: Step S10, pairing the driving recorder with a smart terminal in the Find My network; Step S20, after the pairing is successful, the Bluetooth main control chip transmits a Bluetooth signal to the smart terminal in the Find My network at a preset time interval, or upon receiving a search and positioning instruction issued by the smart terminal, sends a Bluetooth signal to the smart terminal according to the search and positioning instruction, and sends the search and positioning instruction to the buzzer module, the Bluetooth signal includes the identity information and current location information of the driving recorder; Step S30, the acceleration sensor detects the motion state and direction change information of the driving recorder. When the driving recorder moves or is hit, the acceleration sensor will sense the corresponding acceleration change and feed back the acceleration change data to the Bluetooth main control chip. The Bluetooth main control chip determines whether the driving recorder is accidentally moved or hit according to the acceleration change data, and uploads it to the smart terminal; or, when the driving recorder is lost, the acceleration sensor wakes up the Bluetooth main control chip, broadcasts data to the smart terminal in the external Find My network through the Bluetooth main control chip, and sends the identity information and current location information of the driving recorder to the smart terminal in the Find My network; Step S40: the buzzer module issues an alarm prompt upon receiving the search and positioning instruction.

10. The driving recorder positioning method according to claim 9, characterized in that: In step S20, when the Bluetooth main control chip receives the search and positioning instruction issued by the smart terminal, the steps of sending a Bluetooth signal to the smart terminal according to the search and positioning instruction, and sending the search and positioning instruction to the buzzer module include: When the Bluetooth main control chip receives the search and positioning instruction sent by the Apple device, it transmits the identity recognition information and current location information to the Apple device, and the Apple device uploads the identity recognition information and current location information to the iCloud server, and finally feeds back the positioning information to the user's Apple device.

Images