Passenger seat belt and passenger detection system, and passenger vehicle using system

Abstract

A passenger seat belt and passenger detection system, and a passenger vehicle using the system, relating to the field of passenger safety guarantee of passenger vehicles. One LIN module can be connected to a plurality of passenger seats according to requirements. When the system is powered on and the LIN module is initialized, a normally open switch and a normally closed switch are used, so that the LIN module can adaptively detect whether the passenger seats are connected and detect the status of the passenger seats; and by defining a frame header format, the LIN module from which a slave machine task comes can be identified, or the passenger seat from which status information of the passenger seats comes can be determined by means of a frame header. By means of an LIN bus, data interaction between an on-board controller and passenger seats is established, so that a display system can effectively process display and reminder logic.

Description

Passenger chair safety belt and passenger detection system and passenger car using the system TECHNICAL FIELD

[0001] The present application relates to a passenger chair safety belt and passenger detection system and passenger car using the system, belonging to the field of passenger car safety detection. BACKGROUND

[0002] When passengers are riding in a passenger car, it is necessary for the driver to remind the passengers to sit stably and fasten the safety belt to ensure the safety of the passengers. However, the number of passenger chairs in the passenger car is large, and the number of passenger chairs in different car models varies greatly, which leads to great difficulty in detection. Currently, a wireless detection module is installed on each passenger chair, and the module sends the detected seat occupancy and safety belt fastening condition to the host computer for systematic detection.

[0003] The Chinese patent application file with publication number CN116788199A discloses a seat belt wireless communication method and system. The method detects whether the seat belt is fastened based on a fastening detection device and a slave controller arranged on each seat. The slave controller sends a slave data signal including the seat belt buckle state detected by the fastening detection device, and the slave controller needs to be awakened through wireless communication with the vehicle and send the slave data signal to the master controller, which can help the driver remind the passengers to pay attention to safety.

[0004] However, this scheme has problems such as high design cost, wireless communication failure, inconsistent battery life in the wireless module leading to detection failure, etc. because each seat needs to be equipped with a detection device and a slave controller. Each module needs to be calibrated or use different software to identify the seat order. SUMMARY

[0005] The purpose of the present application is to provide a passenger chair safety belt and passenger detection system and passenger car using the system to solve the problem of high cost and easy failure in identifying whether the passenger has fastened the safety belt in the prior art.

[0006] To achieve the above-mentioned purpose, the scheme of the present application includes:

[0007] A passenger seat safety belt and passenger detection system, comprising a LIN link connected with a vehicle controller, the LIN link being composed of a plurality of LIN modules connected in sequence, a previous stage LIN module in the LIN link acting as a host of a next stage LIN module, the vehicle controller acting as a host of a first LIN module, each pin of each LIN module detecting each passenger seat in the vehicle according to a corresponding relationship to obtain a detection result including a passenger and a safety belt state; a certain number of frame headers are allocated to each LIN module, used for the LIN module to upload a slave task of itself and all downstream LIN modules received from the slaves to its host; the slave task includes a situation of the corresponding LIN module pin detecting the passenger seat and a detection result of each pin; the vehicle controller obtains the detection result of each passenger seat according to the frame header and the corresponding relationship.

[0008] Further, when detecting the safety belt state and the passenger state of the passenger seat, one pin uses a normally closed switch trigger and the other pin uses a normally open switch trigger; when the LIN module is powered on and the pin does not detect a closed switch, the LIN module considers that there is no passenger seat connected.

[0009] The LIN module can identify a closed micro switch through a pin; when detecting the safety belt state and the passenger state of the passenger seat, normally open and normally closed switches are used for triggering, which can ensure that in a normal state (no passenger and no safety belt), the pin can detect an electrical signal caused by a closed switch (a connected switch and a disconnected switch cannot be distinguished), which is helpful for the system to quickly determine which pin is connected to the passenger seat.

[0010] Further, the LIN module uses a normally closed switch trigger when detecting the safety belt state of the passenger seat and uses a normally open switch trigger when detecting the passenger state of the passenger seat.

[0011] A normally closed switch trigger is used when detecting the safety belt state of the passenger seat and a normally open switch trigger is used when detecting the passenger state of the passenger seat; when the system is powered on for the first time, if any one of two pins connected with two switches corresponding to one seat detects an electrical signal, the vehicle controller will record that there is a seat at this place, thereby obtaining the seat connection situation, and then only the passenger seat state detection is performed; when the seat is removed, the recorded data of the vehicle controller can be cleared through a re-learning instruction and whether there is a passenger seat at this place is recorded again.

[0012] Further, the LIN link has two branches, which are respectively used for detecting the passenger seats connected to the left and right sides of the vehicle cabin.

[0013] The system can display the passenger seat conditions on the left and right sides of the vehicle cabin according to the slave tasks sent by the LIN modules on the left and right sides.

[0014] Further, a row of pins on the LIN module detects corresponding passenger seats on the corresponding side of the vehicle cabin in sequence; a column of pins on the LIN module detects corresponding passenger seats on the corresponding side of the vehicle cabin in sequence, and when a passenger seat is missing at the corresponding position, the pin of the corresponding LIN module is suspended.

[0015] By setting a column of pins on the LIN module to detect corresponding passenger seats on the corresponding side of the vehicle cabin in sequence, the system can display the spatial positions of the passenger seats in the vehicle cabin on the display system, which helps the driver to be reminded.

[0016] Further, for one side of the vehicle door, when the pins of the LIN module detect the passenger seats, a certain pin detects the connection of the passenger seat or does not detect the connection of the passenger seat to distinguish whether the passenger seat detected by the LIN module is located in front of the vehicle door or behind the vehicle door.

[0017] By setting a certain pin of the LIN module to detect the connection of the passenger seat or not to detect the connection of the passenger seat, the system can know whether the passenger seat state information detected is the state information of the passenger seat located in front of the vehicle door or behind the vehicle door on the side of the vehicle door, which facilitates the addition of the vehicle door position when the passenger seat state is displayed, and facilitates the identification of the seat position on the passenger car with many passenger seats.

[0018] A passenger car applying a passenger seat safety belt and a passenger detection system, comprising a LIN link connected to a vehicle controller and composed of a plurality of LIN modules connected in sequence, wherein the upper LIN module in the LIN link serves as the host of the lower LIN module, and the vehicle controller serves as the host of the first LIN module, each pin of each LIN module detects each passenger seat in the vehicle according to a unique corresponding relationship to obtain a detection result including the seat state and the safety belt state; a certain number of frame headers are allocated to each LIN module, which are used for the LIN module to upload itself and the slave tasks of all downstream LIN modules uploaded by its slaves to its host; the slave task includes the detection of the passenger seat by the corresponding LIN module pin and the detection result of each pin; and the vehicle controller obtains the detection result of each passenger seat according to the frame header and the corresponding relationship.

[0019] Further, when detecting the safety belt state and the seat state of the passenger seat, one pin of the LIN module uses a normally closed switch trigger, and the other pin uses a normally open switch trigger; when the pin does not detect a closed switch when the LIN module is powered on, the LIN module considers that there is no passenger seat connected.

[0020] Further, the LIN module uses a normally closed switch trigger when detecting the safety belt state of the passenger seat, and uses a normally open switch trigger when detecting the seat state of the passenger seat.

[0021] Further, the LIN link has two lines, which are respectively used for detecting the passenger seats connected to the left and right sides of the car.

[0022] Further, a row of pins on the LIN module detects the corresponding row of passenger seats connected to the corresponding side of the car in sequence; a column of pins on the LIN module detects the corresponding column of passenger seats connected to the corresponding side of the car in sequence, and when the passenger seat at the corresponding position is missing, the pin of the corresponding LIN module is suspended.

[0023] Further, for one side of the door, when the pin of the LIN module detects the connected passenger seat, the connection of the passenger seat is detected by a specific pin, and the connection of the passenger seat is not detected by a specific pin, so as to distinguish whether the passenger seat detected by the LIN module is located in front of the door or behind the door.

[0024] The beneficial effects of the present application are:

[0025] The present application is an open-ended invention. When detecting whether the passenger seat is occupied and whether the safety belt is fastened, each pin of each LIN module can effectively detect each passenger seat in the vehicle according to the corresponding relationship with the passenger seat, so as to obtain the detection results including the occupancy and the safety belt state. A certain number of frame headers are allocated to each LIN module, which can effectively enable each LIN module to send the slave task including itself and all received LIN modules. All LIN modules use the same software and materials, and each LIN module does not need to be calibrated or use different software to identify the state of the passenger seat at different positions, which can effectively reduce the cost and realize the detection of whether each passenger seat is occupied and whether the passenger safety belt is fastened. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 is a schematic diagram of a passenger seat safety belt and occupancy detection system according to the present application;

[0027] Fig. 2 is a schematic diagram of a passenger seat self-adaptive detection process of a passenger seat safety belt and occupancy detection system according to the present application;

[0028] Fig. 3 is a schematic diagram of an 8-row 3-column passenger seat arrangement in a car compartment in an embodiment of the system;

[0029] Fig. 4 is a schematic diagram of LIN module detection of an 8-row 3-column passenger seat in an embodiment of the system;

[0030] Fig. 5 is a schematic diagram of a LIN module self-learning process of a passenger seat safety belt and occupancy detection system according to the present application. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions and advantages of the present application more clear and explicit, the present application will be further described in detail below with reference to the drawings and embodiments.

[0032] The concept of the present application is to build a LIN bus for passenger seat occupancy and seat belt detection by using the same software and material LIN modules, each of which detects a plurality of passenger seats connected to the corresponding area in sequence according to the arrangement of the passenger seats, thereby reducing the cost. When the bus system is powered on for the first time or reset, considering that a plurality of passenger seats are to be connected to one module at the same time, in order for the LIN module to sequentially detect all the passenger seats of the bus, and in order to distinguish the LIN modules in the system so that the bus can identify the passenger seats at a specific position, the BCM (Body Control Module) or the upper LIN module needs to send a data frame to the lower LIN module to allocate the pre-set frame header downward, and the BCM determines which LIN module the slave task comes from by the frame header format of the LIN module feedback data, and also determines which passenger seats the passenger seat state information comes from by the slave task, when the data frame sent by the LIN module has no response, it is considered that the module connected is the last row of passenger seats.

[0033] System embodiment:

[0034] The present embodiment provides a passenger seat seat belt and occupancy detection system, as shown in FIG. 1:

[0035] The figure shows a typical hardware architecture of the passenger seat seat belt and occupancy detection system of the present embodiment, including two LIN links corresponding to the passenger seats on the left and right sides of the vehicle box: LIN1 left and LIN2 right, LIN1 corresponds to detecting the passenger seats on the left side of the vehicle box, and LIN2 corresponds to detecting the passenger seats on the right side of the vehicle box. Each LIN link includes a plurality of LIN modules, and each LIN module detects a plurality of passenger seats connected in sequence according to the arrangement of the passenger seats.

[0036] The BCM of the bus can send LIN data frames to the LIN link based on different LIN communication ports, and the BCM transmits each LIN module data frame received through the CAN bus to the display system, which includes the vehicle multimedia center (CDC), the central control screen, the first in-vehicle display screen, the second in-vehicle display screen, etc. The display system displays and reminds according to the corresponding data processing logic.

[0037] Specifically, the following is an example of the present application with each LIN module having two columns of 12 pins. Since each seat needs to detect whether a person is sitting and whether the seat belt is inserted, each seat needs two pins, i.e. the LIN module in this embodiment supports detection of 6 seats and below. In Figure 1, the LIN module on each side is denoted as Sn, and considering that the total number of passenger seats in a passenger vehicle is not more than 50, n is less than or equal to 5. The LIN module pin numbers are set to 1-6 (the pin numbered X represents a group of two pins connected to one passenger seat), in order to allow the display system to accurately display the passenger seats in front of and behind the door, for all passenger seats installed in front of the door on the door side or on the side without a door, the LIN module 1 pin will be connected to the passenger seat; for passenger seats installed behind the door on the door side, the LIN module 1 pin is not connected to the passenger seat, and the passenger seat is connected from the 2nd or subsequent number.

[0038] The LIN module detects whether the connected passenger seat is occupied and whether the seat belt is inserted through two micro switches. When a person sits on the corresponding passenger seat, the corresponding micro switch is triggered, allowing the LIN module to detect that the corresponding passenger seat is occupied; when the seat belt on the passenger seat is fastened, the corresponding micro switch is also triggered, allowing the LIN module to detect that the seat belt on the corresponding passenger seat is fastened.

[0039] Further, in order to facilitate the LIN module to identify which pins (a group of pins connected to one passenger seat) are connected to the passenger seat. In this embodiment, the two micro switches use normally open and normally closed switches respectively. When the LIN module is powered on, it will first detect a normally closed signal through the pins, thereby determining that the group of pins is connected to the passenger seat. Considering that when the vehicle is empty, all passenger seats are in the state of not being occupied and not having the seat belt fastened, therefore one of the pins in a group of pins connected to one passenger seat is connected to the closed contact; when the vehicle has passengers, the passenger seat is occupied and the seat belt is fastened, one of the micro switches is also closed, therefore facilitating the system to detect all passenger seats; considering that when the vehicle is not running, the passenger seat is more likely to be occupied but not fastened than the seat belt to be fastened but not occupied, therefore as the best embodiment, the micro switch reflecting the seat belt state is set to normally closed, and the micro switch reflecting the occupant is set to normally open.

[0040] And in normal cases, passengers will buckle up after sitting down, if using normally open switch, only when passenger sits down or buckles up, the system will detect the presence of passenger seat; if using normally closed switch, when the passenger sits down and buckles up, the two micro switches are disconnected, the system can not identify the presence of passenger seat; both of the two schemes are not conducive to the system to quickly detect all passenger seats. Therefore, when detecting whether the pins corresponding to the LIN module are connected to the passenger seat, the method shown in Figure 2 is used. As long as the safety belt state detection using normally closed switch and the sitting detection using normally open switch, when one of the pins has input, the LIN module records the pin number of the connected passenger seat, and then the system enters normal working state.

[0041] By designing whether the No. 1 passenger seat pin of the LIN module is suspended, the position of the passenger seat is identified as being in front of or behind the door, and the LIN module is connected in the order of the actual passenger seat position. Figure 3 shows a passenger car compartment with 8 rows and 3 columns (no door side two columns on the left side, and one column on the door side on the right side) passenger seat arrangement. Taking the left side passenger seat of the car compartment as an example, the 1st, 2nd, 3rd, 4th, 5th, and 6th pins (X-pin represents a group of two pins connected to a passenger seat) of the first LIN module (S1 module) in the left LIN1 link detect the connection of passenger seats 101-106. The "passenger seat pin arrangement" signal value of the S1 module when it sends the slave task is 0x01, indicating that the S1 module corresponding pin is connected to the first 6 passenger seats in the 2 columns and 3 rows on the door side (i.e. left side) of the passenger car. The 1st, 2nd, 3rd, 4th, 5th, and 6th pins of the second LIN module (S2 module) in the left LIN1 link detect the connection of passenger seats 107-112. The "passenger seat pin arrangement" signal value of the S2 module when it sends the slave task is 0x01, indicating that the 6 passenger seats in the middle of the 2 columns and 3 rows on the door side (i.e. left side) of the passenger car are connected. The 1st, 2nd, 3rd, and 4th pins of the third LIN module (S3 module) in the left LIN1 link detect the connection of passenger seats 113-116. The "passenger seat pin arrangement" signal value of the S3 module when it sends the slave task is 0x02, indicating that the last 4 passenger seats in the 2 columns and 2 rows on the door side (i.e. left side) of the passenger car are connected. The connection relationship is shown in Figure 4. That is, 0x01 represents that the 6 groups of pins of the LIN module are connected to the passenger seats, and 0x02 represents that the 1st, 2nd, 3rd, and 4th pins close to one end of the LIN module are connected to the passenger seats (such as the LIN module numbered S3 on the left side in Figure 4).

[0042] Taking the passenger chair on the right side of the carriage as an example, as shown in FIG. 4, the 1st, 3rd and 5th pins (3 pins on the side of the LIN module) of the 1st LIN module (S1 module) in the right LIN2 link detect the connection of the passenger chairs 117-119, and the signal value of the "passenger chair pin arrangement" of the S1 module when acting as a slave is 0x03, indicating that the corresponding pins of the S1 module are connected to the 1st column of the first 3 passenger chairs in front of the passenger door (i.e. the right side) of the passenger car. Considering that the LIN module detecting the connection of the passenger chairs behind the passenger door is not connected to the 1st pin, the passenger chairs 120 and 121 behind the passenger door of the passenger car are connected to the 3rd and 5th pins of the 2nd LIN module (S2 module) in the right LIN2 link respectively, at this time the signal value of the "passenger chair pin arrangement" of the right S2 module when acting as a slave is 0x04, indicating that the corresponding pins of the S2 module are connected to the 2 passenger chairs in the 1st column and the 1st row behind the passenger door of the passenger car, and the passenger chair 122 behind the passenger door of the passenger car is connected to the 5th pin of the 3rd LIN module (S3 module) in the right LIN2 link, at this time the signal value of the "passenger chair pin arrangement" of the right S3 module when acting as a slave is 0x05, indicating that the corresponding pins of the S3 module are connected to the last passenger chair behind the passenger door of the passenger car. That is, 0x03 indicates that the 3 groups of odd-numbered pins (1st, 3rd and 5th pins) on the side of the LIN module are connected to the passenger chairs (such as the right LIN module numbered S1 in FIG. 4), 0x04 indicates that the 3rd and 5th pins of the LIN module are connected to the passenger chairs (such as the right LIN module numbered S2 in FIG. 4), and 0x05 indicates that the 5th pin of the LIN module is connected to the passenger chairs (such as the right LIN module numbered S3 in FIG. 4). Of course, more signal values of pins of different numbers of LIN modules connecting passenger chairs can also be set according to needs.

[0043] The above gives an implementation of a LIN module according to a settable rule capable of one-to-one correspondence with passenger seats in the vehicle cabin, connecting passenger seats distributed in the vehicle cabin, that is, multiple LIN modules sequentially connect passenger seats in different areas of the vehicle cabin, and according to the distribution position of the pins on the LIN module, the corresponding pins are connected to the passenger seats in the corresponding area at the corresponding position. The pins corresponding to the position without passenger seats are idle, and the corresponding "passenger seat pin arrangement" signal value is set according to the connection of the LIN module pins to the passenger seats. When the LIN module sends the signal value representing the corresponding "passenger seat pin arrangement" to the BCM, the BCM can identify the position of each passenger seat connected by each pin of the corresponding LIN module according to the position of the corresponding LIN module in the link and the distribution of the pins connected to the passenger seats, and further according to the seat belt and seat detection signals of each pin, the detection results of each passenger seat can be displayed and the unfastened seat belt alarm can be realized. As other implementations, different pins of different LIN modules can be connected in a unique corresponding manner to detect different passenger seats according to other settable rules, and the BCM can identify the positions of the passenger seats connected by different pins of different LIN modules according to the same rules after receiving the "passenger seat pin arrangement" signal.

[0044] In this way, when the system receives the "passenger seat pin arrangement" signal of all LIN modules, it can clearly know the positions of all passenger seats and their relationship with the vehicle door, and when displaying the positions of the passenger seats on the screen, the distribution of each passenger seat in the vehicle can be more clearly displayed; and after receiving the seat and seat belt detection signals of the pins connected to the passenger seats by each LIN module, the state of the passenger seat at the corresponding position can be displayed.

[0045] Further, when numbering the LIN modules, the LIN frame header needs to be allocated and defined. If X number of LIN modules are connected to the LIN link on the BCM side, since the slave tasks of all LIN modules in the link need to be forwarded by the first LIN module (S1 module in FIG. 1), the first LIN module in the link is allocated X frame headers to mark and distinguish the slave tasks of the X LIN modules including itself. The second LIN module (S2 module in FIG. 1) in the link needs to forward the slave tasks of all LIN modules except S1 module, so the S2 module in the link is allocated X-1 frame headers to mark and distinguish the slave tasks of the X-1 LIN modules including itself. In this way, until the last LIN module is allocated 1 frame header. The purpose of allocating a frame header to the last LIN module in the link is to mark itself as the last LIN module in the link after the last LIN module sends the frame header to its host port, and it only needs to send its slave task to the host using the frame header sent by the host (the upper-level LIN module).

[0046] In determining which LIN module the slave task comes from, self-learning mode as shown in Fig. 5 is adopted, taking the left side of the car cabin shown in Fig. 3 as an example. The LIN frame header is defined as follows: 0x01 (defined as the passenger seat 101-106 connected with LIN module S1), 0x02 (defined as the passenger seat 107-112 connected with LIN module S2), 0x03 (defined as the passenger seat 113-116 connected with LIN module S3), S1 master frame header: 0x04 (defined as the passenger seat 107-112 connected with LIN module S2), 0x05 (defined as the passenger seat 113-116 connected with LIN module S3), S2 master frame header: 0x06 (defined as the passenger seat 113-116 connected with LIN module S3), S3 master frame header: 0x07 (no response).

[0047] Specifically, as shown in Fig. 5, when the system is powered on, the LIN module slave port receives the frame header periodically sent from the upper master port, and self-learns the number according to the frame header format (the number is recorded for the convenience of distinguishing the module, and can not be recorded), when the first LIN module slave port receives the frame header of 0x01, 0x02 or 0x03, the module records its own number as 1, and periodically sends the frame header of 0x04 or 0x05 at its own master port, when receiving the slave task, the slave task is packaged to 0x01, 0x02 or 0x03; when the next LIN module slave port receives the frame header of 0x04 or 0x05, the module records its own number as 2, then the master port of the 2nd LIN module periodically sends the frame header of 0x06 to the next LIN module, when receiving the slave task, the slave task is packaged to 0x04 or 0x05; when the next LIN module slave port receives the frame header of 0x06, the module records its own number as 3, then the master port of the 3rd LIN module periodically sends the frame header of 0x07 to the next LIN module, when receiving the slave task, the slave task is packaged to 0x06; when the data frame sent by the LIN module master port has no response, the LIN module records that it is the tail passenger seat.

[0048] Further, 4-bit signals are used to define the passenger seat safety belt and seat state signals, for example: 0x00 (no one unfastened, display no one unfastened or unfastened without alarm), 0x01 (no one fastened, display no one), 0x02 (someone unfastened, display unfastened + alarm n times or n seconds), 0x03 someone fastened (display someone), 0x04 (safety belt or sensor failure), 0x05 (no such passenger seat), 0x06-0x0E (reserved), 0x0F (invalid).

[0049] Specifically, each LIN module sends a slave task to the BCM through the upper LIN module after detecting the specific state information of the passenger seat. For example, the S2 master port of the left LIN module of the bus receives a S3 slave task with a LIN module frame header of 0x06, which includes the pin number and the seat belt, seat occupancy and other signals of the passenger seat corresponding to the pin number. The LIN module S2 changes the frame header of the slave task received from its master port to 0x05 (0x04 frame header is reserved for its own slave task), and packs it to the master port of the LIN module S1. The LIN module S1 changes the frame header of the slave task received from the LIN module S3 to 0x03 (0x01 frame header is reserved for its own slave task, and 0x02 frame header is reserved for the slave task of the LIN module S2), and packs it to the master port of the BCM. The BCM identifies that it is the slave task of the left LIN module S3 according to the frame header of 0x03, and further identifies the position of the passenger seat corresponding to each pin number in the bus according to the slave task, and then converts the seat belt and seat occupancy of the corresponding passenger seat into CAN bus data, and sends it to the display system. The display system processes the display and reminder logic.

[0050] The bus embodiment is provided.

[0051] The embodiment provides a bus applying the passenger seat belt and occupancy detection system. The bus is provided with the passenger seat belt and occupancy detection system as described in the system embodiment. Since the system embodiment has sufficiently described the system, details are not repeated here.

[0052] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application but not to limit it. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced by the same, without departing from the spirit and scope of the present application. Any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. A passenger seat belt and occupant detection system, characterized by, The LIN link is connected with the vehicle controller, and is composed of a plurality of LIN modules connected in sequence, wherein the upper LIN module is the host of the lower LIN module, and the vehicle controller is the host of the first LIN module; each pin of each LIN module detects each passenger seat in the vehicle according to a corresponding relationship to obtain a detection result including a seat and a safety belt state; a certain number of frame headers are allocated to each LIN module, which is used for uploading the slave task of all downstream LIN modules received by the LIN module to its host; the slave task includes the detection of the passenger seat by the corresponding LIN module pin and the corresponding detection result of each pin; and the vehicle controller obtains the detection result of each passenger seat according to the frame header and the corresponding relationship.

2. The passenger seat belt and occupant detection system according to claim 1, characterized by, When detecting the safety belt state and the seat state of the passenger seat, one pin of the LIN module uses a normally closed switch trigger, and the other pin uses a normally open switch trigger; when the pin does not detect a closed switch, the LIN module considers that the passenger seat is not connected.

3. The passenger seat belt and occupant detection system according to claim 2, characterized by, When detecting the safety belt state of the passenger seat, the LIN module uses a normally closed switch trigger, and when detecting the seat state of the passenger seat, the LIN module uses a normally open switch trigger.

4. The passenger seat belt and occupant detection system according to claim 1, characterized by, The LIN link has two LIN links, which are used for detecting the passenger seats connected to the left and right sides of the vehicle compartment, respectively.

5. The passenger seat belt and occupant detection system according to claim 1, characterized by, One row of pins on the LIN module detects a corresponding row of passenger seats connected to the corresponding side of the vehicle compartment in sequence; and one column of pins on the LIN module detects a corresponding column of passenger seats connected to the corresponding side of the vehicle compartment in sequence, and when the corresponding passenger seat is missing, the pin of the corresponding LIN module is suspended.

6. The passenger seat belt and occupant detection system according to claim 5, characterized by, For one side of the vehicle door, the pin of the LIN module detects the passenger seat connected, and distinguishes whether the passenger seat detected by the LIN module is located in front of the vehicle door or behind the vehicle door by detecting or not detecting the passenger seat connected through a specific pin.

7. A bus applying a passenger seat belt and an occupant detection system, characterized by, The LIN link is connected with the vehicle controller, and is composed of a plurality of LIN modules connected in sequence, wherein the upper LIN module is the host of the lower LIN module, and the vehicle controller is the host of the first LIN module; each pin of each LIN module detects each passenger seat in the vehicle according to a corresponding relationship to obtain a detection result including a seat and a safety belt state; a certain number of frame headers are allocated to each LIN module, which is used for uploading the slave task of all downstream LIN modules received by the LIN module to its host; the slave task includes the detection of the passenger seat by the corresponding LIN module pin and the corresponding detection result of each pin; and the vehicle controller obtains the detection result of each passenger seat according to the frame header and the corresponding relationship.

8. The bus using the passenger seat belt and occupant detection system according to claim 7, wherein When detecting the safety belt state and the seat state of the passenger seat, one pin of the LIN module uses a normally closed switch trigger, and the other pin uses a normally open switch trigger; when the pin does not detect a closed switch, the LIN module considers that the passenger seat is not connected.

9. The bus using the passenger seat belt and occupant detection system according to claim 8, wherein The LIN module uses normally closed switch triggering when detecting the seat belt state of the passenger seat and uses normally open switch triggering when detecting the occupancy state of the passenger seat.

10. The bus using the passenger seat belt and occupant detection system according to claim 7, wherein The LIN link has two links, which are respectively used for detecting the passenger seats connected to the left and right sides of the car.

11. The passenger vehicle using the passenger seat belt and occupant detection system according to claim 7, characterized in that, A row of pins on the LIN module sequentially detects the corresponding row of passenger seats connected to the corresponding side of the car; a column of pins on the LIN module sequentially detects the corresponding column of passenger seats connected to the corresponding side of the car, and when the corresponding passenger seat is missing, the pin of the corresponding LIN module is suspended.

12. The passenger vehicle using the passenger seat belt and occupant detection system according to claim 11, characterized in that, For one side of the door, when the pin of the LIN module detects the connected passenger seat, the connection of the passenger seat is detected or not detected through a specific pin to distinguish whether the passenger seat detected by the LIN module is located in front of the door or behind the door.

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