Automobile safety belt state detection device and method and automobile

Abstract

The invention discloses an automobile safety belt state detection device and method and an automobile, and relates to the technical field of automobile manufacturing, the automobile safety belt state detection device comprises a to-be-detected circuit and a controller, a plurality of resistors with different resistance values, a plurality of first switches and a plurality of second switches; the first switch and the second switch corresponding to the same seat are connected in series and then connected with the corresponding resistor in parallel; the controller is connected with the to-be-detected circuit and is configured to obtain a total resistance value of the to-be-detected circuit; and according to the total resistance value of all the resistors of the circuit to be detected and the obtained total resistance value of the circuit to be detected, determining a seat which is provided with a person and does not fasten a safety belt. According to the invention, the to-be-detected circuit which is finally connected in series is connected with the controller, and the seat which is provided with a person and does not fasten a safety belt can be determined by only one wiring port, so that the number of the wiring ports is reduced, and the production cost of the whole vehicle is reduced.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing technology, specifically to an automobile seat belt status detection device, method, and vehicle. Background Technology

[0002] Seat belts are a common feature in automobiles designed to ensure passenger safety and effectively improve passenger security. As regulations for car seat belts become increasingly stringent, rear seat seat belt alarms are now also required, leading to a rise in the number of seats requiring seat belt alarms. Currently, car seat belt status detection devices are independently installed in the seat and connect to a controller's detection port to identify whether the passenger is wearing a seat belt.

[0003] However, as the number of seats increases, the number of controller detection ports also increases, especially in buses where there can be dozens of seats. If each seat uses a hard-wired detection method, the controller will require too many hard-wired ports to meet the requirements. Summary of the Invention

[0004] This invention provides a vehicle seat belt status detection device, which can solve the technical problem of requiring too many controller detection ports as the number of seats increases.

[0005] In a first aspect, embodiments of the present invention provide an automotive seatbelt status detection device, comprising: The circuit to be tested includes: Multiple resistors with different resistance values ​​are connected in series, each corresponding to a seat. Multiple first switches, each corresponding to a seat, are used to indicate whether the seat belt is fastened; Multiple secondary switches, each corresponding to a seat, are used to indicate whether a seat is occupied. The first switch corresponding to the same seat is a normally closed switch, and the second switch is a normally open switch. The first switch and the second switch corresponding to the same seat are connected in series and then connected in parallel with the corresponding resistor. The controller, which is connected to the circuit under test, is configured to: Obtain the total resistance value of the circuit under test; Based on the total resistance value of all resistors in the circuit under test and the total resistance value of the circuit under test, determine the seats where someone is sitting and is not wearing a seat belt.

[0006] In conjunction with the first aspect, in one implementation, it further includes: A voice alarm system is installed inside the passenger compartment; The controller is connected to the voice alarm, and the controller is further configured to: When it is determined that there is an occupant in the seat and that the person is not wearing a seatbelt, a voice alarm signal will be sent to the voice alarm device.

[0007] In conjunction with the first aspect, in one implementation, it further includes: In-vehicle infotainment display screen; The controller is connected to the vehicle display screen, and the controller is further configured to: When it is determined that there is an occupant in the seat and that the occupant is not wearing a seatbelt, a display signal is sent to the vehicle's infotainment display screen.

[0008] In conjunction with the first aspect, in one implementation, the controller is a vehicle controller.

[0009] In a second aspect, embodiments of the present invention provide an automotive seatbelt status detection device, comprising: Multiple circuits to be tested, each circuit to be tested includes: Multiple resistors with different resistance values ​​are connected in series, each corresponding to a seat. Multiple first switches, each corresponding to a seat, are used to indicate whether the seat belt is fastened; Multiple secondary switches, each corresponding to a seat, are used to indicate whether a seat is occupied. The first switch corresponding to the same seat is a normally closed switch, and the second switch is a normally open switch. The first switch and the second switch corresponding to the same seat are connected in series and then connected in parallel with the corresponding resistor. The controller, which is connected to multiple circuits to be tested, is configured as follows: Obtain the total resistance value of each circuit under test; Based on the total resistance value of all resistors in the circuit under test and the obtained total resistance value of the circuit under test, determine the seats where someone is sitting and is not wearing a seat belt.

[0010] Thirdly, embodiments of the present invention provide a method for detecting the status of a car seatbelt, comprising the following steps: Obtain the total resistance value of the circuit under test; Based on the total resistance value of all resistors in the circuit under test and the total resistance value of the circuit under test, determine the seats where someone is sitting and is not wearing a seat belt.

[0011] In conjunction with the third aspect, one implementation also includes the following steps: When it is determined that there is an occupant in the seat and that the person is not wearing a seatbelt, a voice alarm signal will be sent to the voice alarm device.

[0012] In conjunction with the third aspect, one implementation also includes the following steps: When it is determined that there is an occupant in the seat and that the occupant is not wearing a seatbelt, a display signal is sent to the vehicle's infotainment display screen.

[0013] In conjunction with the third aspect, in one embodiment, the controller is a vehicle controller. Fourthly, embodiments of the present invention provide a vehicle including the aforementioned vehicle seatbelt status detection device.

[0014] The beneficial effects of the technical solutions provided by the embodiments of the present invention include: This invention provides a vehicle seatbelt status detection device, method, and vehicle, comprising: a circuit to be detected, including: multiple resistors with different resistance values, each corresponding to a seat, the multiple resistors being connected in series; multiple first switches, each corresponding to a seat, used to indicate whether the seatbelt is fastened; multiple second switches, each corresponding to a seat, used to indicate whether there is an occupant in the seat; the first switches corresponding to the same seat are normally closed switches, the second switches are normally open switches, and the first switches and second switches corresponding to the same seat are connected in series and then in parallel with the corresponding resistors; a controller connected to the circuit to be detected, configured to: acquire the total resistance value of the circuit to be detected; and determine, based on the total resistance value of all resistors in the circuit to be detected and the acquired total resistance value of the circuit to be detected, seats where an occupant is not wearing a seatbelt. This invention, by connecting the final series-connected circuit to the controller, requires only one wiring port to determine seats where an occupant is not wearing a seatbelt, reducing the number of wiring ports on the controller and lowering the overall vehicle production cost. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a first structural schematic diagram of the vehicle seat belt status detection device according to an embodiment of the present invention; Figure 2 This is a second structural schematic diagram of the automotive seatbelt status detection device according to an embodiment of the present invention; In the diagram: 10, first switch; 20, second switch; 30, controller; 40, vehicle display screen; 50, voice alarm; 60, resistor; 70, circuit to be tested. Detailed Implementation

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

[0018] Example 1: As regulations for automotive seat belts become increasingly stringent, rear seat seat belt warning systems are now required, leading to a surge in the number of seats needing seat belt warnings. Currently, seat belt status detection devices are independently installed at the seat and connect to a controller's detection port to identify whether the passenger is wearing a seat belt. However, with the increasing number of seats, especially in buses with dozens of seats, the required number of controller detection ports is also increasing. If each seat uses a hard-wired detection method, the controller would require too many hard-wired ports, failing to meet the requirements.

[0019] See Figure 1 As shown, this embodiment of the invention provides a vehicle seat belt status detection device, which includes: a detection circuit 70, comprising: a plurality of resistors 60 with different resistance values, each corresponding to a seat, the plurality of resistors 60 being connected in series; a plurality of first switches 10, each corresponding to a seat, used to indicate whether the seat belt is fastened; a plurality of second switches 20, each corresponding to a seat, used to indicate whether there is a person in the seat; the first switches corresponding to the same seat are normally closed switches, the second switches are normally open switches, and the first switches and second switches corresponding to the same seat are connected in series and then in parallel with the corresponding resistors; and a controller 30, which is connected to the detection circuit 70 and configured to: acquire the total resistance value of the detection circuit 70; and determine, based on the total resistance value of all resistors in the detection circuit 70 and the acquired total resistance value of the detection circuit 70, a seat where someone is in the seat and the seat belt is not fastened.

[0020] The first switch 10 is a seat belt switch. It is a normally closed switch. When the seat belt is fastened, the first switch 10 is open. When the seat belt is unfastened, the first switch 10 is closed.

[0021] The second switch 20 is a placeholder switch. It is a normally open switch. When the seat is empty, the second switch 20 is open, and when the seat is occupied, the second switch 20 is closed.

[0022] There are multiple resistors of 60, the number of which corresponds to the number of seats. The resistance values ​​of each resistor are different, and the total resistance value of each combination is unique after all the resistors are arranged and combined.

[0023] The controller 30 is used to acquire the total resistance value of the circuit under test 70 and analyze the seat corresponding to the missing resistor based on the difference between the total resistance value of all resistors in the circuit under test 70 and the acquired total resistance value of the circuit under test 70.

[0024] In one embodiment, the resistance values ​​of resistors i (i=1, 2, 3, ..., N) corresponding to seat numbers 1, 2, 3, ..., N are sequentially selected as 1Ω, 3Ω, 5Ω, 10Ω, 30Ω, 50Ω, 100Ω, 300Ω, 500Ω, 1000Ω, 3000Ω, 5000Ω, ... and so on. Before the car starts and the seats are empty, since the first switch 10 is a normally open switch and the second switch 20 is a normally closed switch, the parallel circuits of the first switch 10 and the second switch 20 connected to the resistors corresponding to all seats are open, and the total resistance value of the detection circuit 70 is equal to the sum of the resistance values ​​of all resistors. When all seats in the car are occupied and everyone is wearing a seatbelt, the first switch 10 is open and the second switch 20 is closed. At this time, the parallel circuits of the first switch 10 and the second switch 20 connected to the resistors corresponding to all seats are open, and the total resistance value of the detection circuit 70 is equal to the sum of the resistance values ​​of all resistors. When some seats in the car are occupied and no one is wearing a seatbelt, both the first switch 10 and the second switch 20 corresponding to those seats are closed, short-circuiting the resistors corresponding to those seats. The total resistance value of the detection circuit 70 is equal to the sum of all resistance values ​​minus the resistance values ​​corresponding to all seats occupied and no one is wearing a seatbelt. The seats where no one is wearing a seatbelt are determined based on the missing resistance values.

[0025] Based on the selected resistance values, it can be determined that the resistance corresponding to seats 1, 2, and 3 only affects the units digit of the missing resistance value. Therefore, the units digit of the missing resistance value can reflect whether there are people in seats 1, 2, and 3 who are not wearing seat belts. When the units digit of the missing resistance value is 1, it indicates that the person in seat 1 is not wearing a seat belt. When the units digit of the missing resistance value is 3, it indicates that the person in seat 2 is not wearing a seat belt. When the units digit of the missing resistance value is 4, it indicates that the person in seats 1 and 2 is not wearing a seat belt. When the units digit of the missing resistance value is 5, it indicates that the person in seat 3 is not wearing a seat belt. When the units digit of the missing resistance value is 6, it indicates that the person in seats 1 and 3 is not wearing a seat belt. When the units digit of the missing resistance value is 8, it indicates that the person in seats 2 and 3 is not wearing a seat belt. When the units digit of the missing resistance value is 9, it indicates that the person in seats 1, 2, and 3 is not wearing a seat belt.

[0026] This method determines that the resistance corresponding to seats 4, 5, and 6 only affects the tens digit of the missing resistance value. Therefore, the tens digit of the missing resistance value can reflect whether there are people in seats 4, 5, and 6 who are not wearing seat belts. When the tens digit of the missing resistance value is 1, it indicates that the person in seat 4 is not wearing a seat belt. When the tens digit of the missing resistance value is 3, it indicates that the person in seat 5 is not wearing a seat belt. When the tens digit of the missing resistance value is 4, it indicates that the people in seats 4 and 5 are not wearing seat belts. When the tens digit of the missing resistance value is 5, it indicates that the person in seat 6 is not wearing a seat belt. When the tens digit of the missing resistance value is 6, it indicates that the people in seats 4 and 6 are not wearing seat belts. When the tens digit of the missing resistance value is 8, it indicates that the people in seats 5 and 6 are not wearing seat belts. When the tens digit of the missing resistance value is 9, it indicates that the people in seats 4, 5, and 6 are not wearing seat belts.

[0027] Similarly, the missing resistor values ​​in the hundreds, thousands, and tens of thousands places can be used to determine which seats are occupied and where no seatbelt is being worn.

[0028] Of course, in addition to this method of selecting resistor values, other resistor values ​​can be used, as long as the sum of the resistance values ​​of each combination of all resistors is a unique value. In this way, seats with people in them and who are not wearing seat belts can be identified one by one.

[0029] This invention provides a vehicle seat belt status detection device. It connects to a controller via a series-connected circuit, requiring only one wiring port to determine whether a seat is occupied and the seat belt is not fastened. This reduces the number of wiring ports and lowers the overall vehicle production cost.

[0030] Example 2: See Figure 1 As shown, the vehicle seat belt status detection device further includes: a voice alarm 50, which is installed in the passenger compartment; the controller 30 is connected to the voice alarm 50, and the controller 30 is further configured to: when it is determined that there is a person in the seat and the seat belt is not fastened, issue a voice alarm signal to the voice alarm 50.

[0031] When the controller 30 detects an unoccupied seat, it will generate a corresponding voice alarm signal to the voice alarm device 50. This voice alarm serves as a reminder to the unfastened person to fasten their seatbelt.

[0032] This invention provides a car seat belt status detection device that can effectively remind passengers who have forgotten to fasten their seat belts through a voice alarm.

[0033] Example 3: See Figure 1As shown, the vehicle seat belt status detection device further includes: a vehicle display screen 40; the controller 30 is connected to the vehicle display screen 40, and the controller 30 is further configured to: when it is determined that there is a person in the seat and the seat belt is not fastened, send a display signal to the vehicle display screen 40.

[0034] When the controller 30 detects a seat occupied by an unbelted passenger, the controller 30 sends a display signal to the vehicle display screen 40, which then alerts the driver which passengers are not wearing seatbelts.

[0035] This invention provides a car seat belt status detection device that alerts the driver via the vehicle's infotainment display screen which passengers are not wearing seat belts. The device can provide real-time updates on the seat belt status of passengers, enhancing safety.

[0036] Example 4: See Figure 1 As shown, the controller of the vehicle seat belt status detection device is a vehicle controller.

[0037] Example 5: See Figure 2 As shown, this embodiment of the invention provides a vehicle seat belt status detection device, which includes: multiple test circuits 70, each test circuit 70 including: multiple resistors 60 with different resistance values, each corresponding to a seat, the multiple resistors 60 being connected in series; multiple first switches 10, each corresponding to a seat, used to indicate whether the seat belt is fastened; multiple second switches 20, each corresponding to a seat, used to indicate whether there is a person in the seat; the first switch 10 corresponding to the same seat is a normally closed switch, the second switch 20 is a normally open switch, and the first switch 10 and the second switch 20 corresponding to the same seat are connected in series and then in parallel with the corresponding resistor 60; a controller 30, which is connected to the multiple test circuits 70 and configured to: acquire the total resistance value of each test circuit 70; and determine, based on the total resistance value of all resistors in the test circuit and the acquired total resistance value of the test circuit, a seat where someone is in the seat and the seat belt is not fastened.

[0038] When this device is applied to large buses, the large number of seats necessitates a greater number of resistors with different values. This results in numerous possible combinations of resistors with varying values, increasing both the difficulty of selecting the appropriate resistors and the computational complexity of identifying occupied seats without seatbelts. To simplify the selection of resistors and the identification of occupied seats without seatbelts, the resistors corresponding to the seats in a vehicle with a large number of seats can be divided into several groups, forming multiple test circuits 70. The controller 30 is connected to these multiple test circuits 70, and the missing resistor values ​​are used to identify the occupied seats without seatbelts in each test circuit 70.

[0039] Taking each circuit 70 to be tested corresponding to 9 seats as an example, each group only needs to select 9 resistors with different resistance values ​​to correspond to the seats. For example, resistors with resistance values ​​of 1Ω, 3Ω, 5Ω, 10Ω, 30Ω, 50Ω, 100Ω, 300Ω, and 500Ω can be selected. That is, based on the values ​​of the ones, tens, and hundreds places of the missing resistance values, it can be determined which of the 9 seats corresponding to each circuit 70 to be tested are occupied and not wearing seat belts, so as to accurately issue a reminder.

[0040] This setup requires only 6 wiring ports to detect 54 seats, which not only greatly reduces the number of wiring ports but also simplifies the calculation of selecting resistance values ​​and identifying which seats are occupied and not wearing seat belts.

[0041] Of course, in addition to this method of selecting resistor values, other resistor values ​​can be used, as long as the sum of the resistance values ​​of each combination of all resistors is a unique value. In this way, seats with people in them and who are not wearing seat belts can be identified one by one.

[0042] This invention provides a vehicle seat belt status detection device. By connecting multiple test circuits connected in series to a controller, only a number of wiring ports corresponding to the number of test circuits are needed to determine whether a seat is occupied and not wearing a seat belt. This reduces the number of wiring ports and lowers the overall vehicle production cost.

[0043] When manufacturing a car, the number of seats can be used to decide whether to use one or multiple circuits to be tested. This can reduce the number of wiring ports and reduce the difficulty of selecting resistors and identifying seats where people are sitting and not wearing seat belts.

[0044] Example 6: See Figure 1 As shown, the vehicle seat belt status detection method uses the aforementioned vehicle seat belt detection device and includes the following steps: obtaining the total resistance value of the circuit to be tested; determining the seats where someone is sitting and is not wearing a seat belt based on the total resistance value of all resistors in the circuit to be tested and the obtained total resistance value of the circuit to be tested.

[0045] Example 7: See Figure 1 As shown, the vehicle seat belt status detection method further includes the following steps: when it is determined that there is someone in the seat and the seat belt is not fastened, a voice alarm signal is sent to the voice alarm device.

[0046] Example 8: See Figure 1 As shown, the vehicle seat belt status detection method further includes the following steps: when it is determined that there is a person in the seat and the seat belt is not fastened, a display signal is sent to the vehicle's infotainment display screen.

[0047] Example 9: See Figure 1 As shown, the vehicle seat belt status detection method includes: the controller is a vehicle controller.

[0048] Example 10: This invention provides a vehicle including the aforementioned seatbelt status detection device.

[0049] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0050] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0051] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A device for detecting the status of automotive seat belts, characterized in that, include: The circuit to be tested includes: Multiple resistors with different resistance values ​​are connected in series, each corresponding to a seat. Multiple first switches, each corresponding to a seat, are used to indicate whether the seat belt is fastened; Multiple secondary switches, each corresponding to a seat, are used to indicate whether a seat is occupied. The first switch corresponding to the same seat is a normally closed switch, and the second switch is a normally open switch. The first switch and the second switch corresponding to the same seat are connected in series and then connected in parallel with the corresponding resistor. The controller, which is connected to the circuit under test, is configured to: Obtain the total resistance value of the circuit under test; Based on the total resistance value of all resistors in the circuit under test and the total resistance value of the circuit under test, determine the seats where someone is sitting and is not wearing a seat belt.

2. The vehicle seatbelt status detection device according to claim 1, characterized in that, Also includes: A voice alarm system is installed inside the passenger compartment; The controller is connected to the voice alarm, and the controller is further configured to: When it is determined that there is an occupant in the seat and that the person is not wearing a seatbelt, a voice alarm signal will be sent to the voice alarm device.

3. The vehicle seatbelt status detection device according to claim 1, characterized in that, Also includes: In-vehicle infotainment display screen; The controller is connected to the vehicle display screen, and the controller is further configured to: When it is determined that there is an occupant in the seat and that the occupant is not wearing a seatbelt, a display signal is sent to the vehicle's infotainment display screen.

4. The vehicle seatbelt status detection device according to claim 1, characterized in that: The controller is a vehicle controller.

5. A device for detecting the status of automotive seat belts, characterized in that, include: Multiple circuits to be tested, each circuit to be tested includes: Multiple resistors with different resistance values ​​are connected in series, each corresponding to a seat. Multiple first switches, each corresponding to a seat, are used to indicate whether the seat belt is fastened; Multiple secondary switches, each corresponding to a seat, are used to indicate whether a seat is occupied. The first switch corresponding to the same seat is a normally closed switch, and the second switch is a normally open switch. The first switch and the second switch corresponding to the same seat are connected in series and then connected in parallel with the corresponding resistor. The controller, which is connected to multiple circuits to be tested, is configured as follows: Obtain the total resistance value of each circuit under test; Based on the total resistance value of all resistors in the circuit under test and the obtained total resistance value of the circuit under test, determine the seats where someone is sitting and is not wearing a seat belt.

6. A method for detecting the condition of a car seat belt, using the car seat belt detection device according to claim 1, characterized in that, Includes the following steps: Obtain the total resistance value of the circuit under test; Based on the total resistance value of all resistors in the circuit under test and the total resistance value of the circuit under test, determine the seats where someone is sitting and is not wearing a seat belt.

7. The method for detecting the state of a car seat belt according to claim 6, characterized in that, It also includes the following steps: When it is determined that there is an occupant in the seat and that the person is not wearing a seatbelt, a voice alarm signal will be sent to the voice alarm device.

8. The method for detecting the state of a car seat belt according to claim 6, characterized in that, It also includes the following steps: When it is determined that there is an occupant in the seat and that the occupant is not wearing a seatbelt, a display signal is sent to the vehicle's infotainment display screen.

9. A method for detecting the status of a car seatbelt according to claim 6, characterized in that: The controller is a vehicle controller.

10. A vehicle, characterized in that, Includes a vehicle seatbelt status detection device as described in claim 1 or 5.

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