Seat belt detection circuit, device and method

Abstract

The application discloses a safety belt detection circuit, device and method, relates to the technical field of vehicle safety, and discloses a safety belt detection circuit, which comprises a safety belt identification module, a seat identification module and an auxiliary identification module; the auxiliary identification module is connected with the safety belt identification module and the seat identification module respectively. The seat identification module is used for detecting whether a user is seated, and outputs a seat signal to the auxiliary identification module when detecting that the user is seated; the safety belt identification module is used for detecting whether a safety belt is in a connected state, and outputs a connection signal to the auxiliary identification module when detecting that the safety belt is in the connected state; and the auxiliary identification module is used for judging the sequence of the seat signal and the connection signal after receiving the seat signal and the connection signal, and determining that the safety belt is in a false wearing state when detecting that the connection signal is prior to the seat signal, so as to identify whether the safety belt is correctly worn and remind the user.

Description

Technical Field

[0001] This application relates to the field of vehicle safety technology, and in particular to seat belt detection circuits, devices, and methods. Background Technology

[0002] In the field of vehicle safety technology, seat belts serve as a crucial lifeline. Their core value lies in their ability to quickly and effectively restrain occupants' bodies during an accident, significantly reducing impact injuries caused by inertia. They are an indispensable means of protecting occupants from serious injury or even death. However, despite the irreplaceable protective function of seat belts, some passengers, for personal comfort reasons, feel uncomfortable with the pressure from the webbing after wearing a seat belt and thus adopt inappropriate coping methods.

[0003] These passengers would insert the seatbelt latch into the buckle before sitting down, deliberately letting the seatbelt webbing wrap around their back to evade the existing seatbelt reminder system. While this temporarily relieves the pressure from the webbing, it significantly weakens the seatbelt's protective function in emergency situations.

[0004] In the event of a collision or sudden accident, an improperly worn seatbelt will not be able to effectively restrain the occupant's body, causing the occupant to violently impact the vehicle's interior structure due to inertia, or even be thrown out of the vehicle, thus facing an extremely high risk of injury. Summary of the Invention

[0005] The main objective of this application is to provide a seat belt detection circuit, device, and method, which aims to solve the technical problem that traditional seat belt unfastened reminder technology cannot identify situations where the user is not wearing the seat belt properly, thus failing to provide a reminder.

[0006] To achieve the above objectives, this application proposes a seatbelt detection circuit, comprising: a seatbelt recognition module, a seating recognition module, and an auxiliary recognition module; the auxiliary recognition module is connected to both the seatbelt recognition module and the seating recognition module; the seating recognition module is used to detect whether a user is seated, and outputs a seating signal to the auxiliary recognition module upon detection of seating; the seatbelt recognition module is used to detect whether the seatbelt is in a connected state, and outputs a connection signal to the auxiliary recognition module upon detection of a connected seatbelt; the auxiliary recognition module is used to, upon receiving the seating signal and the connection signal, determine the order of the seating signal and the connection signal, and when the connection signal is detected before the seating signal, determine that the seatbelt is in a false wearing state.

[0007] In one embodiment, the seatbelt detection circuit further includes: an alarm module; both the auxiliary identification module and the seatbelt identification module are connected to the alarm module through the seating identification module; the seating identification module is further configured to, upon detecting that a user has sat down, establish the connection between the seatbelt identification module and the alarm module, and also establish the connection between the auxiliary identification module and the alarm module; the auxiliary identification module is further configured to, when the seatbelt is in a false-wearing state, output a first alarm signal to the alarm module; the seatbelt identification module is further configured to, when detecting that the seatbelt is not in a connected state, output a second alarm signal to the alarm module; the alarm module is configured to, upon receiving the first alarm signal, prompt the user that the seatbelt is in a false-wearing state; the alarm module is further configured to, upon receiving the second alarm signal, output a first-level unfastened reminder.

[0008] In one embodiment, the alarm module is further configured to, upon receiving the second alarm signal, acquire vehicle power-on information and vehicle speed information, and output a level-two unattended reminder when both the vehicle power-on information and the vehicle speed information are outside a preset safety threshold.

[0009] In one embodiment, the seatbelt recognition module includes a first magnetic switch; the seat recognition module includes a second magnetic switch; a first end of the first magnetic switch is connected to a second end of the second magnetic switch, and the second end of the first magnetic switch is grounded; a first end of the second magnetic switch is connected to the alarm module, and a second end of the second magnetic switch is connected to the first end of the first magnetic switch; the first magnetic switch is used to switch from a normally closed state to a normally open state when the seatbelt is detected to be connected; the second magnetic switch is used to switch from a normally open state to a normally closed state when the user is detected to be seated.

[0010] In one embodiment, the auxiliary identification module includes a first resistor and a second resistor; a first end of the first resistor is connected to a first end of the first magnetic switch, and a second end of the first resistor is connected to a second end of the second resistor; a first end of the second resistor is connected to a second end of the first magnetic switch.

[0011] In addition, to achieve the above objectives, this application also proposes a seat belt detection device, which uses the seat belt detection circuit described above.

[0012] In addition, to achieve the above objectives, this application also proposes a seat belt detection method, which uses the seat belt detection device described above. The method includes: obtaining the resistance value of the seat belt detection device; determining whether the resistance value is within a first preset range; and when the resistance value is within the first preset range, prompting the user that the seat belt is in a false wearing state.

[0013] In one embodiment, after the step of prompting the user to fasten the seatbelt when the resistance value is within a first preset range, the method further includes: determining whether the resistance value is within a second preset range; when the resistance value is within the second preset range, outputting a first-level unfastened seatbelt reminder; acquiring vehicle power-on information and vehicle speed information; when both the vehicle power-on information and the vehicle speed information are outside a preset safety threshold, determining whether the resistance value is within the second preset range; when the resistance value is within the second preset range, outputting a second-level unfastened seatbelt reminder.

[0014] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the seat belt detection method described above.

[0015] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the seat belt detection method described above.

[0016] One or more technical solutions proposed in this application have at least the following technical effects:

[0017] The system detects whether the user is seated via a seating recognition module. Upon detection, a seating signal is output to the auxiliary recognition module. Similarly, the system detects whether the seatbelt is connected via a seatbelt recognition module. Upon detection, a connection signal is output to the auxiliary recognition module. The auxiliary recognition module, upon receiving both the seating signal and the connection signal, determines their order. If the connection signal precedes the seating signal, it assumes the seatbelt is not properly worn, thus identifying whether the seatbelt is correctly worn and alerting the user. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural block diagram of the seat belt detection circuit provided in Embodiment 1 of this application;

[0021] Figure 2 This is a circuit connection diagram provided in Embodiment 1 of the seat belt detection circuit of this application;

[0022] Figure 3 This is a flowchart illustrating Embodiment 2 of the seatbelt testing method of this application.

[0023] Explanation of icon numbers:

[0024] label illustrate label illustrate K1 First magnetic switch R1 First resistor K2 Second magnetic switch R2 Second resistor

[0025] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0027] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Existing seatbelt reminders have certain drawbacks. For example, some passengers dislike the pressure that the seatbelt webbing puts on them after they are wearing the seatbelt, so they choose to insert the seatbelt buckle into the buckle before sitting down, thus circumventing the reminder by placing the webbing behind their back.

[0029] Therefore, to address the technical problem that traditional seatbelt reminder technologies cannot detect when a user is not wearing the seatbelt properly, thus failing to provide a reminder, this application proposes a seatbelt detection circuit. Please refer to [link / reference]. Figure 1 , Figure 1 This is a structural block diagram of the seat belt detection circuit provided in Embodiment 1 of this application.

[0030] In Embodiment 1 of this application, the seat belt detection circuit includes: a seat belt recognition module 10, a seating recognition module 20, and an auxiliary recognition module 30; the auxiliary recognition module 30 is connected to the seat belt recognition module 10 and the seating recognition module 20 respectively.

[0031] It should be noted that the seating recognition module 20 is used to detect whether a user has taken a seat. Therefore, it typically needs to integrate sensor technologies, such as pressure sensors, weight sensors, infrared sensors, or more complex image recognition technologies, in order to accurately determine whether a user is seated. Generally speaking, these sensors can detect physical phenomena such as changes in weight, changes in pressure distribution, or obstruction of infrared signals on the seat, thereby making a preliminary judgment on whether a user is seated.

[0032] It should be noted that when a user is detected to have taken a seat, the seat recognition module 20 will output a seat signal to the auxiliary recognition module 30.

[0033] It is understood that the seating signal is usually an electrical or digital signal used to notify other modules or devices in the system, such as the auxiliary identification module, that the user has taken a seat.

[0034] It should be noted that the seat belt recognition module 10 is used to detect whether the seat belt is in a connected state. When the seat belt is detected to be in a connected state, a connection signal is output to the auxiliary recognition module 30.

[0035] Similarly, the seatbelt recognition module 10 typically also needs to integrate sensor technology. The sensor can operate using mechanical contacts, magnetic induction, pressure sensing, or photoelectric sensing. When the sensor detects that the seatbelt's latch has been inserted into the buckle, it transmits this information to the processor inside the module. The processor then determines whether the seatbelt is in a connected state based on preset logic.

[0036] It is understood that the connection signal is an electrical or digital signal used to notify other modules or devices in the system, particularly the auxiliary identification module 30, that the seat belt has been connected.

[0037] It should be noted that the auxiliary identification module 30 is used to determine the order of the seating signal and the connection signal after receiving the seating signal and the connection signal. When the connection signal is detected to precede the seating signal, it is determined that the seat belt is in a false wearing state.

[0038] Understandably, if the auxiliary recognition module 30 detects a connection signal before a seating signal, it will determine that the seatbelt is not properly fastened. This means that the passenger may have fastened the seatbelt before actually sitting down, or may have used other improper means to circumvent the seatbelt reminder system's detection.

[0039] Furthermore, after determining that the seat belt is in a false wearing state, a new logic needs to be designed to deal with this situation. Therefore, in a feasible implementation, the seat belt detection circuit further includes an alarm module 40; the auxiliary identification module 30 and the seat belt identification module 10 are both connected to the alarm module 40 through the seat recognition module 20.

[0040] It should be noted that the seat recognition module 20 is also used to connect the seat belt recognition module 10 to the alarm module 40 and the auxiliary recognition module 30 to the alarm module 40 after detecting that a user has sat down.

[0041] Understandably, this setup ensures that even if the seatbelt recognition module or auxiliary recognition module detects certain states before the user sits down, these states will not be directly transmitted to the alarm module, thus avoiding unnecessary alarms. This aligns with the logic in real life, where whether or not the seatbelt is fastened when the vehicle is empty is unimportant and does not require a reminder.

[0042] It should be noted that the auxiliary identification module 30 is also used to output a first alarm signal to the alarm module 40 when the seat belt is in a false wearing state. The alarm module 40, upon receiving the first alarm signal, prompts the user that the seat belt is in a false wearing state.

[0043] Understandably, once it is confirmed that the seatbelt is in a false wearing state, the auxiliary identification module 30 will immediately generate a first alarm signal and send it to the alarm module 40 through a preset communication interface, such as a serial port or CAN bus. This first alarm signal can also be an electrical or digital signal, indicating that the seatbelt is both connected and in a false wearing state. To attract the user's attention and remind them that the seatbelt is in a false wearing state, the alarm module 40 will take a series of measures to issue an alarm, typically through text prompts such as "Please wear your seatbelt correctly."

[0044] It should be noted that the seatbelt recognition module 10 is also used to output a second alarm signal to the alarm module 40 when it detects that the seatbelt is not connected. The alarm module 40 is also used to output a first-level unfastened reminder after receiving the second alarm signal.

[0045] Understandably, the second alarm signal can also be an electrical or digital signal, used to indicate that the seatbelt is not fastened. To attract the user's attention and remind them that the seatbelt is not fastened, the alarm module 40 will output a Level 1 unfastened reminder. In automotive safety systems, this Level 1 unfastened reminder typically refers to the initial alarm state of the seatbelt unfastened reminder function.

[0046] It's important to note that the Level 1 unfastened seatbelt reminder triggers immediately upon the system detecting that the seatbelt is not fastened, ensuring that occupants notice and take appropriate action promptly. By illuminating a warning light on the dashboard, the Level 1 reminder visually conveys the message that the seatbelt is not fastened. Compared to higher-level alarms, the Level 1 reminder typically involves only a simple reminder action, such as illuminating the warning light, and does not include more forceful alarm methods such as audible alerts.

[0047] In addition, the alarm module 40 is also used to obtain vehicle power-on information and vehicle speed information after receiving the second alarm signal, and output a level two unattended reminder when both the vehicle power-on information and the vehicle speed information are outside the preset safety threshold.

[0048] It should be noted that when the second alarm signal is received, the alarm module 40 will not immediately trigger the secondary unfastened warning. Instead, it will further acquire other relevant vehicle information for a more comprehensive assessment. The alarm module 40 acquires the vehicle's power-on information and speed information via the vehicle bus (such as the CAN bus) or other communication interfaces. The power-on information typically indicates whether the vehicle has started and is powered on. The speed information provides the vehicle's current speed.

[0049] Understandably, if the vehicle power-on information indicates that the vehicle is powered on, and the vehicle speed information also exceeds a preset safety threshold, the alarm module 40 will determine that this is a safety risk requiring high attention. Under these conditions, the alarm module 40 will output a level two unfastened seatbelt reminder. This typically includes illuminating a specific warning light on the dashboard, emitting an audible alarm, and in some cases, displaying a warning message through the vehicle's multimedia system. The preset safety threshold should be reasonably set based on the specific circumstances of the vehicle and safety standards to ensure that it does not cause unnecessary interference while effectively reminding occupants to use their seatbelts.

[0050] Based on the above, this embodiment proposes a specific implementation method. The seat belt recognition module 10 includes a first magnetic switch K1; the seat recognition module 20 includes a second magnetic switch K2; and the auxiliary recognition module 30 includes a first resistor R1 and a second resistor R2. Specifically, please refer to... Figure 2 , Figure 2 This is a circuit connection diagram provided in Embodiment 1 of the seat belt detection circuit of this application.

[0051] The first magnetic switch K1 is used to switch from a normally closed state to a normally open state when the seat belt is detected to be connected; the second magnetic switch K2 is used to switch from a normally open state to a normally closed state when the user is detected to be seated; the alarm module 40 selects an ACU chip.

[0052] It should be noted that the first terminal of the first magnetic switch K1 is connected to the second terminal of the second magnetic switch K2, and the second terminal of the first magnetic switch K1 is grounded; the first terminal of the second magnetic switch K2 is connected to the alarm module, and the second terminal of the second magnetic switch K2 is connected to the first terminal of the first magnetic switch K1. The first terminal of the first resistor R1 is connected to the first terminal of the first magnetic switch K1, and the second terminal of the first resistor R1 is connected to the second terminal of the second resistor R2; the first terminal of the second resistor R2 is connected to the second terminal of the first magnetic switch K1.

[0053] For ease of explanation, the resistance values ​​of both the first resistor R1 and the second resistor R2 are set to 10 ohms. The possible circuit configurations can be represented by the total resistance values. Based on the circuit connections, the following configurations exist:

[0054] Before the user is seated, the seatbelt is in a connected state, i.e., the seatbelt is in a false wearing state: at this time, the first magnetic switch K1 is open. The next moment, when the user is seated, the second magnetic switch K2 is closed, and the resistance of the circuit changes from open circuit to 10 ohms.

[0055] When the user sits down and the seatbelt is not engaged: at this time, the first magnetic switch K1 is closed and the second magnetic switch K2 is closed, and the circuit resistance is 5 ohms.

[0056] When the user is seated and the seatbelt is engaged, the first magnetic switch K1 is open and the second magnetic switch K2 is closed, resulting in a circuit resistance of 10 ohms.

[0057] Understandably, at the moment of boarding, a change in resistance from open circuit to 10 ohms indicates the seatbelt is in a false-wearing state; a change in resistance from open circuit to 5 ohms indicates the seatbelt is not connected; and a change in resistance from open circuit to 5 ohms and then back to 10 ohms indicates the user is seated, the seatbelt is connected, and safe for driving. Therefore, the connection signal, seat-holding signal, first alarm signal, and second alarm signal can all be represented by resistance signals, which is intuitive and clear.

[0058] This embodiment provides a seatbelt detection circuit. A seating recognition module detects whether a user is seated, and outputs a seating signal to the auxiliary recognition module upon detection. The seatbelt recognition module also detects whether the seatbelt is in a connected state, and outputs a connection signal to the auxiliary recognition module upon detection. Upon receiving the seating signal and the connection signal, the auxiliary recognition module determines their order. If the connection signal precedes the seating signal, it is determined that the seatbelt is in a false-wearing state, thus identifying whether the seatbelt is worn correctly and reminding the user.

[0059] This application also provides a seat belt detection device. The seat belt detection device employs the seat belt detection circuit described in the above embodiments, which solves the technical problem that traditional seat belt unfastened reminder technologies cannot identify situations where the user is not wearing the seat belt properly, thus failing to provide a reminder. Compared with the prior art, the beneficial effects of the seat belt detection device provided in this application are the same as those of the seat belt detection circuit provided in the above embodiments, and other technical features of the device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0060] Furthermore, embodiments of this application provide a seatbelt detection method, referring to... Figure 3 , Figure 3 This is a flowchart illustrating Embodiment 2 of the seatbelt testing method of this application.

[0061] In this embodiment, the seat belt detection method includes steps S10 to S30:

[0062] Step S10: Obtain the resistance value of the seat belt detection device.

[0063] It should be noted that the resistance value of the seat belt detection device is the loop resistance value of the seat belt detection circuit in the seat belt detection device, and the loop resistance value can be read through the ACU chip.

[0064] Step S20: Determine whether the resistance value is within a first preset range.

[0065] Step S30: When the resistance value is within the first preset range, the user is prompted that the seat belt is in a false wearing state.

[0066] It should be noted that the first preset range is mainly used to determine whether the seat belt is being worn incorrectly. This needs to consider differences in circuit resistance caused by factors such as actual resistance value error and wiring harness connections. Therefore, a range is usually specified. In the example above where both the first resistor R1 and the second resistor R2 have a resistance of 10 ohms, we can specify the first preset range as a value greater than 8 ohms. If the resistance value falls directly within the first preset range after the user sits down, it is considered that the seat belt is being worn incorrectly, and the user should be prompted to wear the seat belt correctly.

[0067] In one feasible implementation, after step S30, the method further includes: determining whether the resistance value is within a second preset range; when the resistance value is within the second preset range, outputting a first-level unattended reminder; acquiring vehicle power-on information and vehicle speed information; when both the vehicle power-on information and the vehicle speed information are outside a preset safety threshold, determining whether the resistance value is within the second preset range; when the resistance value is within the second preset range, outputting a second-level unattended reminder.

[0068] Similarly, the second preset range mainly considers whether the seat belt is connected. It also needs to take into account the difference in circuit resistance caused by factors such as the actual resistance value error of the resistor and the wiring harness connection. Therefore, a range is usually specified. As in the example above where the resistance values ​​of the first resistor R1 and the second resistor R2 are both 10 ohms, we can specify the second preset range as a value of 4 ohms to 8 ohms. If the resistance value is within the second preset range after sitting down, then the seat belt is not connected, and a first-level unfastened reminder needs to be output.

[0069] Furthermore, it is necessary to determine the vehicle's power-on information and vehicle speed information. If the vehicle power-on information indicates that the vehicle is powered on, and the vehicle speed information also exceeds the preset vehicle speed safety threshold, and the resistance value is still within the second preset range, then the seat belt is not yet connected, and a secondary unfastened reminder needs to be output.

[0070] This embodiment provides a seat belt detection method that identifies the connection status of the seat belt through resistance detection. It can not only realize the detection of seat belt disconnection during driving as required by regulations, but also realize the identification of whether the seat belt is being worn falsely after getting into the vehicle. It solves the technical problem that traditional seat belt reminder technology cannot identify the situation of users wearing the seat belt falsely, and therefore cannot remind them.

[0071] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the seat belt detection method of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0072] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the seat belt detection method in the above embodiments.

[0073] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0074] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0075] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0076] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0077] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described seatbelt detection method. This solves the technical problem that traditional seatbelt reminder technologies cannot identify situations where the user is not wearing the seatbelt properly, thus failing to provide a reminder. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the seatbelt detection method provided in the above embodiments, and will not be repeated here.

[0078] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the seatbelt detection method described above.

[0079] The computer program product provided in this application can solve the technical problem that traditional seat belt unfastened reminder technology cannot identify situations where the user is not wearing the seat belt properly, thus failing to provide a reminder. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the seat belt detection method provided in the above embodiments, and will not be repeated here.

[0080] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A seat belt detection circuit, characterized by, The safety belt detection circuit comprises a safety belt identification module, a seat identification module and an auxiliary identification module; The auxiliary identification module is connected to the safety belt identification module and the seat identification module respectively; The seat identification module is configured to detect whether a user is seated and output a seat signal to the auxiliary identification module when detecting that the user is seated; The safety belt identification module is configured to detect whether a safety belt is in a connected state and output a connection signal to the auxiliary identification module when detecting that the safety belt is in the connected state; The auxiliary identification module is configured to receive the seat signal and the connection signal and determine the order of the seat signal and the connection signal, and determine that the safety belt is in a false wearing state when detecting that the connection signal precedes the seat signal; The safety belt detection circuit further comprises an alarm module; The auxiliary identification module and the safety belt identification module are connected to the alarm module through the seat identification module; The safety belt identification module comprises a first magnetic switch, and the seat identification module comprises a second magnetic switch; A first end of the first magnetic switch is connected to a second end of the second magnetic switch, and a second end of the first magnetic switch is grounded; A first end of the second magnetic switch is connected to the alarm module, and a second end of the second magnetic switch is connected to a first end of the first magnetic switch; The first magnetic switch is configured to switch from a normally closed state to a normally open state when detecting that the safety belt is in the connected state; The second magnetic switch is configured to switch from a normally open state to a normally closed state when detecting that the user is seated.

2. The safety belt detection circuit of claim 1, wherein The seat identification module is further configured to turn on the connection between the safety belt identification module and the alarm module and turn on the connection between the auxiliary identification module and the alarm module when detecting that the user is seated; The auxiliary identification module is further configured to output a first alarm signal to the alarm module when the safety belt is in the false wearing state; The safety belt identification module is further configured to output a second alarm signal to the alarm module when detecting that the safety belt is not in the connected state; The alarm module is configured to prompt the user that the safety belt is in the false wearing state when receiving the first alarm signal; The alarm module is further configured to output a first-level unfastening reminder when receiving the second alarm signal.

3. The seat belt detection circuit of claim 2, wherein, The alarm module is further configured to receive vehicle power-on information and vehicle speed information when receiving the second alarm signal, and output a second-level unfastening reminder when the vehicle power-on information and the vehicle speed information are both outside a preset safety threshold.

4. The seat belt detection circuit of claim 1, wherein, The auxiliary identification module comprises a first resistor and a second resistor; A first end of the first resistor is connected to a first end of the first magnetic switch, and a second end of the first resistor is connected to a second end of the second resistor; A first end of the second resistor is connected to a second end of the first magnetic switch.

5. A seat belt detection device characterized by comprising: The safety belt detection device applies the safety belt detection circuit of any one of claims 1 to 4.

6. A seat belt detection method characterized by, The method applies the safety belt detection device of claim 5, and the method comprises: Obtaining the resistance value of the safety belt detection device; determining whether the resistance value is in a first preset range; when the resistance value is in the first preset range, prompting a user that the seat belt is in a false wearing state.

7. The method of claim 6, wherein, The step of prompting the user that the seat belt needs to be connected after the resistance value is in the first preset range further comprises: determining whether the resistance value is in a second preset range; when the resistance value is in the second preset range, outputting a first level of unfastening reminding; acquiring vehicle power-on information and vehicle speed information; when both the vehicle power-on information and the vehicle speed information are outside a preset safety threshold, determining whether the resistance value is in the second preset range; when the resistance value is in the second preset range, outputting a second level of unfastening reminding.

8. A storage medium, characterized by The storage medium is a computer readable storage medium, and the storage medium has a computer program stored thereon, and the computer program is executed by the processor to implement the steps of the seat belt detection method according to claim 6 or 7.

9. A computer program product, characterised in that, The computer program product comprises a computer program, and the computer program is executed by the processor to implement the steps of the seat belt detection method according to claim 6 or 7.

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