Control method for seat belt retractor, electronic device, medium, system, and vehicle

Abstract

The present application relates to a control method for a seat belt retractor, an electronic device, a medium, a system, and a vehicle. The seat belt retractor comprises: a mechanical trigger device configured to mechanically trigger a locked state of the seat belt retractor; and an electrical driving device configured to electrically drive the mechanical trigger device. When it is determined that the seat belt retractor is required to be in an inhibited state, the electrical driving device drives the mechanical trigger device to be restricted and unable to trigger the locked state of the seat belt retractor. The mechanical trigger device can be restricted, thereby improving convenience in use.

Description

Control method of seat belt retractor, electronic device, medium, system and vehicle

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202411078150.4, filed on August 7, 2024, to the Chinese Patent Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of vehicle safety control, in particular to a control method of a seat belt retractor, an electronic device, a computer readable medium, a system and a vehicle. BACKGROUND

[0004] The seat belt retractor is used to lock the seat belt when the vehicle is in an emergency situation, so as to effectively bind the passenger to the seat and ensure the safety of the passenger.

[0005] The current seat belt retractor is mostly mechanically triggered, relying on inertial force and gravity to trigger. In the actual use process, the seat belt is often locked unreasonably under some non-emergency working conditions, which meets the mechanical triggering condition and causes inconvenience to the passenger. TECHNICAL SOLUTION

[0006] The present application provides a control method of a seat belt retractor, an electronic device, a computer readable medium, a system and a vehicle, which improves the use convenience of the seat belt retractor, to at least partially solve the above technical problems.

[0007] In order to achieve the above purpose, according to the first aspect of the present application, a control method of a seat belt retractor is provided, the seat belt retractor comprising: a mechanical triggering device configured to mechanically trigger a locked state of the seat belt retractor; and an electrically controlled driving device configured to electrically drive the mechanical triggering device.

[0008] The control method comprises: when it is determined that the seat belt retractor needs to be in a suppression state, the electrically controlled driving device drives the mechanical triggering device to be limited and unable to trigger the locked state of the seat belt retractor.

[0009] Optionally, the determination that the seat belt retractor needs to be in the suppression state comprises: obtaining vehicle current information of the vehicle; wherein the vehicle current information comprises: external environment information of the vehicle and / or vehicle running information; wherein the external environment information of the vehicle comprises: environmental obstacle information; and wherein the vehicle running information comprises: one or more of vehicle speed, vehicle acceleration and vehicle body angle.

[0010] Optionally, wherein the electrically controlled driving device drives the mechanical trigger device into a locked state in which the mechanical trigger device is restricted from triggering the seatbelt retractor when it is determined that the seatbelt retractor needs to be in the suppressed state, comprises:

[0011] the electrically controlled driving device drives the mechanical trigger device into a locked state in which the mechanical trigger device is restricted from triggering the seatbelt retractor when the vehicle speed is in a preset speed threshold interval; and / or

[0012] the electrically controlled driving device drives the mechanical trigger device into a locked state in which the mechanical trigger device is restricted from triggering the seatbelt retractor when the vehicle acceleration is in a preset acceleration threshold interval; and / or

[0013] the electrically controlled driving device drives the mechanical trigger device into a locked state in which the mechanical trigger device is restricted from triggering the seatbelt retractor when the vehicle body angle is in a preset vehicle body angle threshold interval.

[0014] the electrically controlled driving device drives the mechanical trigger device into a locked state in which the mechanical trigger device is restricted from triggering the seatbelt retractor when the vehicle body angle is in a preset vehicle body angle threshold interval.

[0015] Optionally, the vehicle current information further comprises: vehicle state information, comprising one or more of a driving mode, a seat angle, and a seat mode.

[0016] Optionally, wherein the electrically controlled driving device drives the mechanical trigger device into a locked state in which the mechanical trigger device is restricted from triggering the seatbelt retractor when it is determined that the seatbelt retractor needs to be in the suppressed state, further comprises:

[0017] the electrically controlled driving device drives the mechanical trigger device into a locked state in which the mechanical trigger device is restricted from triggering the seatbelt retractor when the driving mode is in a need of triggering the suppressed state; and / or

[0018] the electrically controlled driving device drives the mechanical trigger device into a locked state in which the mechanical trigger device is restricted from triggering the seatbelt retractor when the seat angle is in a preset seat angle threshold interval; and / or

[0019] the electrically controlled driving device drives the mechanical trigger device into a locked state in which the mechanical trigger device is restricted from triggering the seatbelt retractor when the seat mode is in a zero-gravity seat mode.

[0020] Optionally, the control method further comprises: when it is determined that the seat belt retractor needs to be in the locked state, the electric control driving device drives the mechanical trigger device to be forced to trigger and keep the seat belt retractor in the locked state.

[0021] Optionally, the determination that the seat belt retractor needs to be in the locked state comprises: obtaining vehicle current information of the vehicle; wherein the vehicle current information comprises: external environment information and / or vehicle running information; wherein the external environment information comprises: environmental obstacle information; wherein the vehicle running information comprises: one or more of vehicle speed, vehicle acceleration, and vehicle body angle.

[0022] Optionally, when it is determined that the seat belt retractor needs to be in the locked state, the electric control driving device drives the mechanical trigger device to be forced to trigger and keep the seat belt retractor in the locked state, comprising:

[0023] when the vehicle speed is greater than or equal to the maximum value of a preset speed threshold interval, the electric control driving device drives the mechanical trigger device to be forced to trigger and keep the seat belt retractor in the locked state; and / or

[0024] when the vehicle acceleration is greater than or equal to the maximum value of a preset acceleration threshold interval, the electric control driving device drives the mechanical trigger device to be forced to trigger and keep the seat belt retractor in the locked state; and / or

[0025] when the vehicle body angle is greater than or equal to the maximum value of a preset vehicle body angle threshold interval, the electric control driving device drives the mechanical trigger device to be forced to trigger and keep the seat belt retractor in the locked state.

[0026] Optionally, the control method further comprises: when it is determined that the seat belt retractor needs to be in the decoupled state, the electric control driving device drives the mechanical trigger device to be able to independently trigger the seat belt retractor to be in the locked state.

[0027] Optionally, the determination that the seat belt retractor needs to be in the decoupled state comprises: obtaining vehicle current information of the vehicle; wherein the vehicle current information comprises: external environment information and / or vehicle running information; wherein the external environment information comprises: environmental obstacle information; wherein the vehicle running information comprises: one or more of vehicle speed, vehicle acceleration, and vehicle body angle.

[0028] Optionally, when it is determined that the seat belt retractor needs to be in the decoupled state, the electric control driving device drives the mechanical trigger device to be able to independently trigger the seat belt retractor to be in the locked state, comprising:

[0029] when the vehicle speed is less than or equal to a minimum value of a preset speed threshold interval, the electric control driving device drives the mechanical trigger device to a locked state in which the mechanical trigger device can independently trigger the seat belt retractor; and / or

[0030] when the vehicle acceleration is less than or equal to a minimum value of a preset acceleration threshold interval, the electric control driving device drives the mechanical trigger device to a locked state in which the mechanical trigger device can independently trigger the seat belt retractor; and / or

[0031] when the vehicle body angle is less than or equal to a minimum value of a preset vehicle body angle threshold interval, the electric control driving device drives the mechanical trigger device to a locked state in which the mechanical trigger device can independently trigger the seat belt retractor; and / or

[0032] when the vehicle speed is less than or equal to a minimum value of a preset speed threshold interval and / or the vehicle acceleration is less than or equal to a minimum value of a preset acceleration threshold interval and / or the vehicle body angle is less than or equal to a minimum value of a preset vehicle body angle threshold interval, the electric control driving device drives the mechanical trigger device to a locked state in which the mechanical trigger device can independently trigger the seat belt retractor.

[0033] Optionally, the control method further comprises: when the electric control driving device is powered off, the seat belt retractor is in a decoupled state to make the mechanical trigger device in the locked state in which the mechanical trigger device can independently trigger the seat belt retractor.

[0034] Optionally, the higher the vehicle speed, the lower the maximum value of the preset acceleration threshold interval; and / or

[0035] the higher the vehicle speed, the lower the maximum value of the preset vehicle body angle threshold interval.

[0036] According to a second aspect of the present application, there is also provided an electronic device comprising:

[0037] one or more processors;

[0038] a memory device having one or more programs stored thereon;

[0039] when the one or more programs are executed by the one or more processors, the processors implement the method described above.

[0040] According to a third aspect of the present application, there is also provided a computer readable medium having computer instructions stored thereon, wherein the computer instructions, when executed by a processor, implement the method described above.

[0041] According to the fourth aspect of the present application, there is also provided a seat belt retractor system comprising the electronic device, the electrically controlled driving device and the mechanical trigger device as described above.

[0042] According to the fifth aspect of the present application, there is also provided a vehicle comprising the electronic device or the computer readable medium or the seat belt retractor system as described above.

[0043] The present application has the beneficial effect of providing a control method, an electronic device, a computer readable medium, a system and a vehicle which can limit the mechanical trigger device when the seat belt retractor needs to be in the inhibited state to improve the convenience of use.

[0044] More specifically, some embodiments of the present application can have the following specific beneficial effects:

[0045] Based on the determination that the seat belt retractor needs to be in the inhibited state, the mechanical trigger device is driven by the electrically controlled driving device to be in a locked state in which it is limited and cannot trigger the seat belt retractor, so that the mechanical trigger device can be limited in non-emergency working conditions, reducing the probability of false triggering of the mechanical trigger device and improving the convenience of use.

[0046] According to the comprehensive judgment of the information such as the external environment information, the vehicle running information or the vehicle state, the mechanical trigger device in the seat belt retractor is inhibited, thereby reducing the probability of false triggering of the mechanical trigger device.

[0047] According to the comprehensive judgment of the information such as the external environment information, the vehicle running information or the vehicle state, when the vehicle may be in a dangerous working condition, the locked state of the seat belt retractor is triggered to lock the seat belt, thereby improving the safety.

[0048] According to the comprehensive judgment of the information such as the external environment information, the vehicle running information or the vehicle state, the seat belt retractor is in a decoupled state in a suitable working condition, and the mechanical trigger device can independently trigger the locked state of the seat belt retractor.

[0049] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0051] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0052] FIG. 1 is a schematic view of an overall structure of a first locking mechanism according to an exemplary embodiment of the present disclosure;

[0053] FIG. 2 is a schematic view of a structure of the first locking mechanism according to an exemplary embodiment of the present disclosure, with a housing removed;

[0054] FIG. 3 is a schematic view of a structure of a locking ratchet of the first locking mechanism according to an exemplary embodiment of the present disclosure;

[0055] FIG. 4 is a schematic view of a structure of a vehicle sensing ball portion of the first locking mechanism according to an exemplary embodiment of the present disclosure;

[0056] FIG. 5 is a schematic view of a structure of a first pawl assembly portion of the first locking mechanism according to an exemplary embodiment of the present disclosure;

[0057] FIG. 6 is a schematic view of a structure of a second pawl assembly portion of the first locking mechanism according to an exemplary embodiment of the present disclosure;

[0058] FIG. 7 is a schematic view of a structure of the first locking mechanism according to an exemplary embodiment of the present disclosure, in a locked state;

[0059] FIG. 8 is a schematic view of a structure of the first locking mechanism according to an exemplary embodiment of the present disclosure, in a suppressed state;

[0060] FIG. 9 is a schematic view of a structure of the first locking mechanism according to an exemplary embodiment of the present disclosure, in a decoupled state;

[0061] FIG. 10 is a schematic view of a structure of a second locking mechanism according to an exemplary embodiment of the present disclosure, in a suppressed state;

[0062] FIG. 11 is a schematic view of a structure of the second locking mechanism according to an exemplary embodiment of the present disclosure, in a locked state;

[0063] FIG. 12 is a schematic view of a structure of the second locking mechanism according to an exemplary embodiment of the present disclosure, with a housing removed;

[0064] FIG. 13 is a cross-sectional view of the second locking mechanism according to an exemplary embodiment of the present disclosure;

[0065] FIG. 14 is a schematic view of a structure of a portion of the second locking mechanism according to an exemplary embodiment of the present disclosure;

[0066] FIG. 15 is a schematic view of a structure of a vehicle according to an exemplary embodiment of the present disclosure;

[0067] FIG. 16 is a flowchart of a control method of a seat belt retractor according to an exemplary embodiment of the present disclosure;

[0068] FIG. 17 is a flowchart of another part of a control method of a seat belt retractor according to an exemplary embodiment of the present disclosure;

[0069] FIG. 18 is a flowchart of still another part of a control method of a seat belt retractor according to an exemplary embodiment of the present disclosure;

[0070] FIG. 19 is a block diagram of a vehicle control system according to an exemplary embodiment of the present disclosure;

[0071] FIG. 20 is a schematic diagram of a main process flow of a vehicle according to an exemplary embodiment of the present disclosure;

[0072] FIG. 21 is a flowchart of a control method of a seat belt retractor according to an exemplary embodiment of the present disclosure;

[0073] FIG. 22 is a block diagram of a control device according to an exemplary embodiment of the present disclosure;

[0074] FIG. 23 is a block diagram of an electronic device according to an exemplary embodiment of the present disclosure.

[0075] BRIEF DESCRIPTION OF REFERENCE NUMERALS: 1, vehicle; 10, seat belt retractor; 100, locking mechanism; 110, housing; 110a, first positioning post; 110b, second positioning post; 120, locking ratchet; 121, ratchet tooth; 130, vehicle sensing ball; 140, following pawl; 141, embedding portion; 142, contact portion; 150, first pawl assembly; 151, first electromagnetic device; 152, first slide core; 153, first swing member; 153a, first engaging portion; 153b, first pivot portion; 153c, first pawl contact portion; 153d, first movable post; 160, second pawl assembly; 161, second electromagnetic device; 162, second slide core; 163, second swing member; 163a, second engaging portion; 163b, second pivot portion; 163c, second pawl contact portion; 163d, second movable post; 170, first return spring; 180, second return spring; 190, ball seat; 191, base portion; 191a, seat groove; 192, support portion; 200, locking mechanism; 210, housing; 220, locking ratchet; 230, vehicle sensing ball; 240, following pawl; 290, ball seat; 250, pawl assembly; 251, slide core; 252, return spring.

[0076] Embodiments of the present application

[0077] With reference to the drawings that show the embodiments herein, the technical solutions in the embodiments herein will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments herein, all the other embodiments obtained by a person skilled in the art without any creative effort, fall within the protection scope of the present application.

[0078] Referring to FIGS. 1-9, the present application provides a locking mechanism 100 suitable for a seat belt retractor 10, which comprises a housing 110, a locking ratchet 120, a vehicle sensing ball 130, a follower pawl 140, a first pawl assembly 150, a second pawl assembly 160, a first return spring 170, a second return spring 180, and a ball seat 190, etc.

[0079] The housing 110 is formed with an inner space; the locking ratchet 120 is rotationally connected with the housing 110; the vehicle sensing ball 130 is movably arranged at one side of the locking ratchet 120; the follower pawl 140 is movably arranged between the locking ratchet 120 and the vehicle sensing ball 130; the first pawl assembly 150 is used to move the follower pawl 140 in a first direction; and the second pawl assembly 160 is used to move the follower pawl 140 in a second direction.

[0080] The locking ratchet 120 is provided with a plurality of ratchet teeth 121 on the outer periphery; the follower pawl 140 is provided with an embedding portion 141 for embedding the ratchet teeth 121 to limit the rotation of the locking ratchet 120, and a contact portion 142 for contacting with the vehicle sensing ball 130; and the vehicle sensing ball 130 is arranged between the first pawl assembly 150 and the second pawl assembly 160 to make the first pawl assembly 150 and the second pawl assembly 160 move the follower pawl 140 to a first preset position for locking the locking ratchet 120 and a second preset position for releasing the locking ratchet 120, respectively.

[0081] With the above scheme, the seat belt retractor 10 can lock or release the seat belt under the control of the vehicle controller according to the specific application scenario of the vehicle, thereby meeting the requirements of various application scenarios. Meanwhile, when the electric control of the vehicle fails and the mechanical trigger condition is met, the vehicle sensing ball 130 triggers the locking of the seat belt, thereby increasing the safety.

[0082] Especially, the use of two sets of pawl assemblies can make the follower pawl 140 be in more states, thereby making the seat belt retractor 10 have more control states for the seat belt.

[0083] Specifically, the housing 110 can be the outer shell of the seat belt retractor 10 or an outer shell structure fixedly connected with the outer shell of the seat belt retractor 10.

[0084] The locking ratchet 120 is connected with the winding drum of the seat belt retractor 10, that is, the locking ratchet 120 and the winding drum are synchronous, and the locking of the locking ratchet 120 is the locking of the winding drum. The winding drum is used for winding the seat belt, and thus the locking and releasing of the seat belt can be realized by locking and releasing the winding drum.

[0085] In some embodiments of the present application, the car sensing ball 130 is configured as a spherical steel ball, so that the inertia in all directions is consistent.

[0086] In some embodiments of the present application, the follower pawl 140 is connected with the housing 110, and the rotation axis of the follower pawl 140 is parallel to the rotation axis of the follower pawl 140. This is a better solution from the aspects of locking and preventing motion interference.

[0087] In some embodiments of the present application, the ball seat 190 forms a seat groove 191a for limiting the position of the car sensing ball 130, and the ball seat 190 is fixedly connected with the housing 110.

[0088] The ball seat 190 includes a base part 191 and a support part 192. The base part 191 is used for forming the seat groove 191a, and the support part 192 is used for forming a support shaft hole. The follower pawl 140 forms a rotation shaft part which can extend into the support shaft hole, so that the follower pawl 140 is connected with the ball seat 190.

[0089] The ball seat 190 can form a groove which is better adapted to the shape of the car sensing ball 130, that is, the seat groove 191a, so that the threshold condition of the mechanical trigger can be effectively set. As a structural reuse, the ball seat 190 can be connected with the follower pawl 140 through the support part 192.

[0090] As a specific solution, the support part 192 can be arranged between the locking ratchet 120 and the base part 191.

[0091] In order to better maintain the position of the car sensing ball 130 or effectively drive the follower pawl 140 by the car sensing ball 130, the contact part 142 of the follower pawl 140 is provided with a contact groove (not shown in the figure) which is arranged opposite to the seat groove 191a. Here, the opposite means that the recess directions of the seat groove 191a and the contact groove are substantially opposite.

[0092] In some embodiments of the present application, the first pawl assembly 150 includes a first electromagnetic device 151, a first sliding core 152 and a first swing member 153.

[0093] The first electromagnetic device 151 is configured to generate a first magnetic field; at least a portion of the first sliding core 152 is made of a magnetic material and is configured to be displaced under the action of the first magnetic field of the first electromagnetic device 151; the first swing member 153 is configured to swing under the drive of the first sliding core 152; the first electromagnetic device 151 is fixedly connected to the housing 110; the first sliding core 152 is in sliding connection with the first electromagnetic device 151; the first swing member 153 is in rotational connection with the housing 110 to enable the pawl 140 to be actuated.

[0094] The first electromagnetic device 151 can be any device that converts electrical energy into magnetic energy, such as an electromagnetic relay or other forms of electromagnet.

[0095] In some embodiments of the present application, the second pawl assembly 160 includes a second electromagnetic device 161, a second sliding core 162, and a second swing member 163.

[0096] The second electromagnetic device 161 is configured to generate a second magnetic field; at least a portion of the second sliding core 162 is made of a magnetic material and is configured to be displaced under the action of the second magnetic field of the second electromagnetic device 161; the second swing member 163 is configured to swing under the drive of the second sliding core 162; the second electromagnetic device 161 is fixedly connected to the housing 110; the second sliding core 162 is in sliding connection with the second electromagnetic device 161; the second swing member 163 is in rotational connection with the housing 110 to enable the pawl 140 to be actuated.

[0097] The second electromagnetic device 161 can be any device that converts electrical energy into magnetic energy, such as an electromagnetic relay or other forms of electromagnet.

[0098] In some embodiments of the present application, the first reset spring 170 is configured to apply an elastic force to the first sliding core 152 and / or the first swing member 153 to reset them; one end of the first reset spring 170 is connected to the housing 110, and the other end is connected to the first sliding core 152 and / or the first swing member 153.

[0099] In some embodiments of the present application, the second reset spring 180 is configured to apply an elastic force to the second sliding core 162 and / or the second swing member 163 to reset them; one end of the second reset spring 180 is connected to the housing 110, and the other end is connected to the second sliding core 162 and / or the second swing member 163.

[0100] Referring to FIGS. 1-6, as a specific scheme, the first reset spring 170 is directly connected to the first swing member 153, and the second reset spring 180 is directly connected to the second swing member 163. In this way, although the resistance of the first sliding core 152 and the second sliding core 162 also needs to be overcome, the elastic force is applied more directly.

[0101] As a specific scheme, the first positioning column 110a and the second positioning column 110b are formed inside the shell 110, the first swing piece 153 is formed with the first movable column 153d, the second swing piece 163 is formed with the second movable column 163d, and both ends of the first return spring 170 and the second return spring 180 are provided with a ring. The two rings of the first return spring 170 are respectively sleeved to the first positioning column 110a and the first movable column 153d; and the two rings of the second return spring 180 are respectively sleeved to the second positioning column and the second movable column 163d.

[0102] In some embodiments of the present application, the rotation axis of the first swing piece 153 is parallel to the rotation axis of the second swing piece 163; and the sliding direction of the first slide core 152 is parallel to the sliding direction of the second slide core 162 in different directions.

[0103] Referring to FIGS. 1 and 2, as a specific scheme, the sliding direction of the first slide core 152 is perpendicular to the sliding direction of the second slide core 162. Different sliding directions can make the follow-up pawl 140 receive different direction forces, thereby avoiding the situation of jamming, because the mutually perpendicular sliding directions can produce enough direction force components to avoid the situation of equal force offset and jamming.

[0104] Referring to FIGS. 2, 5 and 6, the first swing piece 153 of the present application includes a first clamping portion 153a, a first rotation shaft portion 153b and a first touch portion 153c. The first clamping portion 153a is formed with a clamping groove to form a movable connection with the first slide core 152; the first rotation shaft portion 153b is used to form a rotation pair with the shell 110 to form a rotation connection; and the first touch portion 153c is used to contact the follow-up pawl 140 to rotate the follow-up pawl 140. It should be noted that the first touch portion 153c has no fixed connection relationship with the follow-up pawl 140, that is, the first touch portion 153c has no influence on the degree of freedom of the follow-up pawl 140 after being turned to a specific position, which is also the reason why the mechanical trigger can still work after the electronic control fails.

[0105] Similarly, referring to FIGS. 2, 5 and 6, the second swing piece 163 of the present application includes a second clamping portion 163a, a second rotation shaft portion 163b and a second touch portion 163c. The second clamping portion 163a is formed with a clamping groove to form a movable connection with the second slide core 162; the second rotation shaft portion 163b is used to form a rotation pair with the shell 110 to form a rotation connection; and the second touch portion 163c is used to contact the follow-up pawl 140 to rotate the follow-up pawl 140. It should be noted that the second touch portion 163c has no fixed connection relationship with the follow-up pawl 140, that is, the second touch portion 163c has no influence on the degree of freedom of the follow-up pawl 140 after being turned to a specific position, which is also the reason why the mechanical trigger can still work after the electronic control fails.

[0106] Of course, in order to adapt to different structures, the specific shape of the first swing member 153 and the second swing member 163 can be configured according to requirements.

[0107] Referring to FIGS. 7-9, the locking mechanism 100 of the present application has three states, the locking state shown in FIG. 7, the restraining state shown in FIG. 8, and the decoupling state shown in FIG. 9.

[0108] The locking state is the state when the safety belt is locked, the restraining state is the state when the follower pawl 140 releases the locking ratchet 120 and can restrain the ball 130, in this state, the safety belt can be pulled out, but the noise generated by the ball 130 is reduced by restraining the ball 130 by the follower pawl 140. The decoupling state is the state when the ball 130 can drive the follower pawl 140 to move to the locking ratchet 120 under the action of inertia, in this state, the mechanical trigger can still work when both the first magnetic field and / or the second magnetic field disappear, further improving the reliability of the locking mechanism.

[0109] When the vehicle is driving normally, the sensing device (sensor) senses the inclination angle and acceleration change, and the control device such as (ECU) receives the signal from the sensor, judges that there is no danger at this time, the first electromagnetic device 151 is powered off → the first slide core 152 extends to the right (pops out) → drives the first swing member 153 to rotate counterclockwise around the fulcrum under the action of the first reset spring 170; the second electromagnetic device 161 is powered on → the second slide core 162 is retracted downward (suction) → drives the second swing member 163 to rotate counterclockwise around the fulcrum → drives the follower pawl 140 to rotate downward, thereby realizing the restraint of the mechanical car and restraining the rotation of the ball 130.

[0110] When the sensor judges that a dangerous situation occurs, the second electromagnetic device 161 is powered off → the second slide core 162 extends upward → the second swing member 163 is lifted by rotating clockwise around the fulcrum under the action of the second reset spring 180; the first electromagnetic device 151 is powered on → the first slide core 152 retracts to the left → drives the first swing member 153 to rotate clockwise around the fulcrum, drives the follower pawl 140 to rotate upward and mesh with the ratchet. Thus, the restraint of the occupant is completed.

[0111] When the first electromagnetic device 151 and the second electromagnetic device 161 fail or are powered off, that is, when both the first magnetic field and the second magnetic field disappear, the first electromagnetic device 151 is powered off → the first slide core 152 extends to the right → the first swing member 153 is lifted by rotating counterclockwise around the fulcrum under the action of the first reset spring 170; the second electromagnetic device 161 is powered off → the second slide core 162 extends upward → the second swing member 163 is lifted by rotating clockwise around the fulcrum under the action of the second reset spring 180.

[0112] At this time, the mechanical vehicle feeling is restored, and the ball 130 is configured to be able to drive the pawl to move to the locked state of the ratchet 120 under the action of inertia, such as sensing the acceleration change through the ball 130, and then pushing the pawl to achieve locking.

[0113] This scheme uses two electromagnetic devices to control the mechanical vehicle feeling, realizes active locking and suppression, and can therefore meet the 0-g seat working condition, seat large-angle adjustment, and vehicle feeling noise suppression, further improving the use comfort. At the same time, when power is off or in case of failure, the ECU controls the two electromagnetic devices to be powered off at the same time, and the mechanical vehicle feeling takes effect. At this time, the safety belt can still be locked.

[0114] Meanwhile, for higher order, to ensure reliability, a position monitoring device (not shown in the figure, the same below) such as a grating is added at the slide core; for identifying whether the slide core is in the attraction or ejection position.

[0115] Specifically, the monitoring device monitors whether the slide core is in the ejection position (1) or in the attraction position (0). Then this signal is transmitted to the control element ECU. When the ECU receives signal 1, the electromagnetic device is in the power-off ejection state at this time, and the next time the ECU should send a power-on signal; on the contrary, when the ECU receives signal 0, the electromagnetic device is in the power-on attraction state at this time, and the next time the ECU should send a power-off signal. Through the above operation, the risk of control logic error can be reduced, and the design reliability is further increased.

[0116] Referring to FIGS. 10-14, as another embodiment of the locking mechanism 200, the housing 210, the locking ratchet 220, the vehicle feeling ball 230, the follow-up pawl 240 and the ball seat 290 adopt a similar design as the foregoing scheme, which will not be described here; the difference between it and the foregoing embodiment is that only one pawl assembly 250 is used, that is, only one slide core 251 and one built-in return spring 252 are provided, thereby canceling the external spring.

[0117] Among them, FIGS. 10 and 11 respectively show the suppression and locking states.

[0118] The application also provides a control method of a safety belt retractor, which is applied to the safety belt retractor, and the safety belt retractor comprises a mechanical trigger device and an electromagnetic control device.

[0119] Specifically, the mechanical trigger device is configured to mechanically trigger the locking state of the safety belt retractor; for example, the mechanical trigger device comprises the foregoing follow-up pawl 140 and vehicle feeling ball 130.

[0120] The electric control driving device is configured to electrically drive the mechanical trigger device; for example, the electric control driving device comprises the foregoing electromagnetic device.

[0121] In some embodiments, the seat belt retractor has a locking state, a restraining state and a decoupling state,

[0122] When the seat belt retractor is in the locking state, the seat belt is in a locked state, and the mechanical trigger device restricts the rotation of the locking ratchet, i.e., the follow-up pawl engages with the locking ratchet.

[0123] When the seat belt retractor is in the restraining state, the mechanical trigger device is in a state of being restricted from moving, i.e., the follow-up pawl restricts the free movement of the vehicle sensing ball, and the mechanical trigger device cannot restrict the rotation of the locking ratchet, and the seat belt is in a free pulling state.

[0124] When the seat belt retractor is in the decoupling state, the mechanical trigger device is in a state of being released to freely move, i.e., the follow-up pawl releases the restriction on the vehicle sensing ball, and the mechanical trigger device can restrict the rotation of the locking ratchet when moving to a preset position.

[0125] In this application, free movement refers to movement to a preset position under the action of inertia without being restricted, rather than unrestricted movement. Here, "free" refers to a state of being unrestricted, rather than a random and arbitrary movement result.

[0126] The control method of the seat belt retractor of the present application includes the following main steps:

[0127] S100: When it is determined that the seat belt retractor needs to be in the restraining state, the electrically controlled driving device drives the mechanical trigger device to be in a state of being restricted and unable to trigger the locking state of the seat belt retractor.

[0128] In this way, when it is determined that the seat belt retractor needs to be in the restraining state, the electrically controlled driving device drives the mechanical trigger device to be in a state of being restricted and unable to trigger the locking state of the seat belt retractor, i.e., the vehicle sensing ball is restricted from freely moving by the follow-up pawl. The mechanical trigger device can be restricted in non-emergency working conditions, reducing the probability of false triggering of the mechanical trigger device and improving the convenience of use.

[0129] At the same time, since the vehicle sensing ball is restricted from freely moving, the noise generated by the vehicle sensing ball when the vehicle vibrates can be reduced.

[0130] In an embodiment of the present application, referring to FIG. 16, more specifically, the control method of the seat belt retractor includes the following specific steps:

[0131] S101: Obtain the current vehicle information of the vehicle;

[0132] S102: When it is determined that the seat belt retractor needs to be in the suppression state, the electric control driving device drives the mechanical trigger device to be in the locked state of being restricted from triggering the seat belt retractor.

[0133] Specifically, the vehicle current information includes one or more of vehicle external environment information and vehicle running information.

[0134] The vehicle external environment information includes environmental obstacle information. The environmental obstacle information includes the vehicle external surrounding environment and road conditions, which can be obtained by sensors, which can include but are not limited to camera, millimeter wave radar, laser radar, etc.

[0135] The vehicle running information includes one or more of vehicle speed, vehicle acceleration and vehicle body angle. The vehicle running information is obtained by an inertial measurement element (IMU), which can mainly detect the vehicle motion state.

[0136] According to the obtained vehicle external environment information and vehicle running information, etc., the vehicle current information is processed by a vehicle microcontroller (MCU) or a driving controller (ECU), and a comprehensive judgment is made to determine whether the seat belt retractor needs to be in the suppression state. When it is determined that the seat belt retractor needs to be in the suppression state, a suppression signal is sent to the electric control driving device, and the electric control driving device drives the mechanical trigger device to be in the locked state of being restricted from triggering the seat belt retractor.

[0137] In some embodiments, step S102 can include the following specific steps:

[0138] When it is perceived from the environmental obstacle information that there is no obstacle in the vehicle surroundings, the electric control driving device drives the mechanical trigger device to be in the locked state of being restricted from triggering the seat belt retractor.

[0139] With such a scheme, the obstacle situation of the vehicle surroundings is considered to prevent collision risks. When there is no obstacle in the vehicle surroundings, i.e., the vehicle is in a non-easy collision working condition, the seat belt does not need to be locked. At this time, by restricting the mechanical trigger device, the locked state of the seat belt retractor is avoided, and noise caused by the mechanical trigger device due to vehicle vibration during normal driving is avoided, and ride comfort is improved.

[0140] In some embodiments, step S102 can include the following specific steps:

[0141] When the vehicle speed is in a preset speed threshold interval, the electric control driving device drives the mechanical trigger device to be in the locked state of being restricted from triggering the seat belt retractor.

[0142] When the vehicle's acceleration is within a preset acceleration threshold range, the electronically controlled drive unit drives the mechanical triggering device to put it in a locked state that restricts the triggering of the seat belt retractor.

[0143] It is understandable that the preset speed threshold range and preset acceleration threshold range can be determined by taking into account factors such as vehicle design, vehicle type, and national standards.

[0144] For example, according to the national standard (GB14166), for a type 4 retractor, the retractor should lock when the vehicle deceleration reaches 0.45g (g = 9.81m / s). The maximum value of the preset acceleration threshold range in this application can be less than 0.45g, for example, it can be 0.1-0.44g.

[0145] This approach determines whether the seatbelt retractor needs to be triggered in a suppressed state based on at least one of the vehicle speed and vehicle acceleration, preventing the mechanical triggering device from triggering the seatbelt retractor's locking state. While ensuring safety, it also avoids noise generated by the mechanical triggering device due to vehicle vibration during normal vehicle operation, thus improving passenger comfort.

[0146] In some embodiments, step S102 may include the following specific steps:

[0147] When the vehicle body angle is within the preset vehicle body angle threshold range, the electronically controlled drive device drives the mechanical trigger device to put it in a locked state that is restricted and cannot trigger the seat belt retractor.

[0148] It is understandable that the threshold range for vehicle body angle can be determined based on vehicle structural design, vehicle type, and national standards.

[0149] For example, according to the national standard (GB14166), for a Type 4 retractor, the retractor should lock when the sensitive device is tilted more than 27° in any direction from its manufacturer-specified installation position. The maximum value of the preset vehicle body angle threshold range in this application can be less than 27°, for example, it can be 0-26°.

[0150] For example, when a vehicle is parked on a steep slope, the vehicle's posture may trigger a locking mechanism, but in reality, the vehicle is simply parked. When the vehicle needs to be started again, the seatbelt may be locked and the webbing may not be able to be pulled out, rendering it unusable and posing a safety risk.

[0151] This approach determines whether the seatbelt retractor needs to be triggered and suppressed based on the vehicle's angle, preventing the mechanical triggering device from triggering the seatbelt retractor's locking state. This avoids accidental triggering of the locking state due to the vehicle's angle, thus preventing the seatbelt retractor from locking and making it impossible to pull out the seatbelt, improving both ease of use and safety.

[0152] The above environmental barrier information, vehicle speed, vehicle acceleration and vehicle body angle can be used to determine that the seat belt retractor needs to be in the suppression state alone, or in combination with at least two of them, thereby improving accuracy, improving safety performance and comfort performance.

[0153] In some embodiments, the vehicle current information further includes vehicle state information.

[0154] Specifically, the vehicle state information includes one or more of a driving mode, a seat angle and a seat mode.

[0155] By combining vehicle state information, off-vehicle environment information and vehicle operation information to comprehensively determine that the seat belt retractor needs to be in the suppression state, the accuracy of determining the current state of the vehicle is improved.

[0156] In some embodiments, step S102 can include the following specific steps:

[0157] When the driving mode is in a state that needs to trigger the suppression state, the electric control driving device drives the mechanical trigger device to be in a locked state that is limited and cannot trigger the seat belt retractor.

[0158] Specifically, the driving mode includes one or more of a comfort mode, an off-road mode, a snow mode, etc.

[0159] For example, when the driving mode is in the sports mode, low-speed crawling is prone to occur, and the vehicle escape process may have multiple sudden accelerations and sudden decelerations in a short period of time, etc. In such cases, because it is in a low-speed state, the danger is usually low. At this time, by limiting the mechanical trigger device, it cannot trigger the locked state of the seat belt retractor, avoiding the situation that the seat belt retractor is frequently locked to cause the passenger to be pulled, and improving the use comfort.

[0160] With such a scheme, whether the seat belt retractor needs to trigger the suppression state is determined based on the driving mode, various driving conditions under various driving modes are flexibly considered, the situation of the seat belt retractor being mistakenly locked is avoided, and the use convenience and comfort are improved.

[0161] In some embodiments, step S102 can include the following specific steps:

[0162] When the seat angle is in a preset seat angle threshold interval, the electric control driving device drives the mechanical trigger device to be in a locked state that is limited and cannot trigger the seat belt retractor.

[0163] It can be understood that the preset seat angle threshold interval is determined according to the seat structure design, the vehicle structure design, etc.

[0164] With such a scheme, whether the seat belt retractor needs to trigger the inhibition state is determined based on the seat angle, avoiding false triggering of the locking state when the seat is at a large reclining angle, and improving the comfort of use.

[0165] In some embodiments, step S102 can include the following specific steps:

[0166] When the seat mode is in the zero-gravity seat mode, the electric control driving device drives the mechanical trigger device to be in a state of being restricted from triggering the locking state of the seat belt retractor.

[0167] For example, in a vehicle with automatic driving, the seat backrest and the seat cushion can be adjusted at a large angle in the 0-gravity seat mode, and the whole 360-degree rotation exceeds the limit angle of the mechanical trigger device triggering the locking state of the seat belt retractor, which is easy to cause the seat belt to be locked. At this time, by limiting the mechanical trigger device, it cannot trigger the locking state of the seat belt retractor, so as to ensure that the adjustment of the seat backrest and the seat cushion will not trigger the locking of the seat belt.

[0168] With such a scheme, whether the seat belt retractor needs to trigger the inhibition state is determined based on the seat mode, avoiding false triggering of the mechanical trigger device in non-dangerous situations, and improving the comfort of passengers.

[0169] The above driving mode, seat angle and seat mode can be used to determine alone that the seat belt retractor needs to be in the inhibition state, or at least two of them are combined to determine, improve the accuracy, and improve the safety performance and comfort performance.

[0170] In some embodiments, the priority of the seat belt retractor needing to be in the inhibition state determined based on the vehicle external environment information and the vehicle running information is higher than that determined based on the vehicle state information. It can be understood that when the vehicle acceleration is greater than the preset acceleration threshold interval and the seat mode is in the zero-gravity seat mode, it should be determined that the seat belt retractor needs to be in the locking state. With such a priority determination scheme, the safety performance is guaranteed.

[0171] In some embodiments, the control method further includes:

[0172] S200: When it is determined that the seat belt retractor needs to be in the locking state, the electric control driving device drives the mechanical trigger device to be in a state of being forced to trigger and keep the locking state of the seat belt retractor.

[0173] With such a way, the locking state of the seat belt retractor is triggered when the vehicle may be in a dangerous working condition, that is, the above-mentioned follow-up pawl engages with the locking ratchet, limiting the rotation of the locking ratchet, locking the seat belt, and improving the safety.

[0174] In an embodiment of the present application, referring to FIG. 17, more specifically, the control method of the seatbelt retractor comprises the following specific steps:

[0175] S201: obtaining vehicle current information of the vehicle;

[0176] S202: when it is determined that the seatbelt retractor needs to be in the locked state, the electric control driving device drives the mechanical trigger device to be forcibly triggered and keep the seatbelt retractor in the locked state.

[0177] Specifically, the vehicle current information comprises one or more of the following: vehicle external environment information and vehicle running information.

[0178] The vehicle external environment information comprises environment obstacle information.

[0179] The vehicle running information comprises one or more of the following: vehicle speed, vehicle acceleration and vehicle body angle.

[0180] According to the obtained vehicle external environment information and vehicle running information, the vehicle current information is processed by the vehicle microcontroller (MCU) or the vehicle controller (ECU), and a comprehensive judgment is made to determine whether the seatbelt retractor needs to be in the locked state. When it is determined that the seatbelt retractor needs to be in the locked state, a locking signal is sent to the electric control driving device, and the electric control driving device drives the mechanical trigger device to be forcibly triggered and keep the seatbelt retractor in the locked state.

[0181] In some embodiments, step S202 can comprise the following specific steps:

[0182] When the vehicle speed is greater than or equal to the maximum value of the preset speed threshold interval, the electric control driving device drives the mechanical trigger device to be forcibly triggered and keep the seatbelt retractor in the locked state.

[0183] It can be understood that when the vehicle speed is greater than or equal to the maximum value of the preset speed threshold interval, the vehicle is in a state with a higher risk coefficient, and at this time it can be determined that the seatbelt retractor needs to be in the locked state to prevent possible emergency situations and improve safety performance.

[0184] In some embodiments, step S202 can comprise the following specific steps:

[0185] When the vehicle acceleration is greater than or equal to the maximum value of the preset acceleration threshold interval, the electric control driving device drives the mechanical trigger device to be forcibly triggered and keep the seatbelt retractor in the locked state.

[0186] Exemplarily, the maximum value of the preset acceleration threshold interval can be 0.45g, and when the vehicle acceleration is greater than or equal to 0.45g, it is determined that the seat belt retractor needs to be in the locked state. In this way, possible emergency situations are prevented, and safety performance is improved.

[0187] In some embodiments, step S202 can include the following specific steps:

[0188] When the vehicle body angle is greater than or equal to the maximum value of the preset vehicle body angle threshold interval, the electric control driving device drives the mechanical trigger device to be in a forced trigger state and keeps the seat belt retractor in the locked state.

[0189] Exemplarily, the maximum value of the preset vehicle body angle threshold interval can be 27°, and when the inclination angle exceeds 27° on the road surface, the vehicle can roll over, and there is a certain safety risk, so it is determined that the seat belt retractor needs to be in the locked state.

[0190] In this way, possible emergency situations are prevented, and safety performance is improved.

[0191] The vehicle speed, vehicle acceleration and vehicle body angle above can be used to determine that the seat belt retractor needs to be in the inhibited state alone, or in combination with at least two of them, so as to improve accuracy and balance safety performance and comfort performance.

[0192] In some embodiments, the control method further includes:

[0193] S300: When it is determined that the seat belt retractor needs to be in the decoupling state, the electric control driving device drives the mechanical trigger device to be in a state capable of independently triggering the locking state of the seat belt retractor.

[0194] It can be understood that when it is determined that the seat belt retractor needs to be in the decoupling state, the electric control driving device drives the mechanical trigger device to be in a state capable of independently triggering the locking state of the seat belt retractor, i.e., the above-mentioned follow-up pawl releases the restriction on the vehicle sensing ball, and the vehicle sensing ball is in a free movement state, and the vehicle sensing ball can push the follow-up pawl to engage with the locking ratchet under the action of inertia to restrict the rotation of the locking ratchet.

[0195] In an embodiment of the present application, referring to FIG. 18, more specifically, the control method of the seat belt retractor includes the following specific steps:

[0196] S301: acquiring vehicle current information of the vehicle;

[0197] S302: When it is determined that the seat belt retractor needs to be in the decoupling state, the electric control driving device drives the mechanical trigger device to be in a state capable of independently triggering the locking state of the seat belt retractor.

[0198] Specifically, the vehicle current information includes: vehicle external environment information and / or vehicle running information.

[0199] The vehicle external environment information includes: environmental obstacle information.

[0200] The vehicle running information includes: one or more of vehicle speed, vehicle acceleration, and vehicle body angle.

[0201] According to the obtained vehicle external environment information and vehicle running information, the vehicle current information is processed by a vehicle microcontroller (MCU) or an electronic control unit (ECU), and a comprehensive judgment is made to determine whether the seat belt retractor needs to be in a suppression state. When it is determined that the seat belt retractor needs to be in a decoupling state, a decoupling signal is sent to the electric control driving device, and the mechanical trigger device is driven by the electric control driving device to be in a locked state capable of independently triggering the seat belt retractor.

[0202] In some embodiments, step S302 can include the following specific steps:

[0203] When the vehicle speed is less than or equal to the minimum value of the preset speed threshold interval, the electric control driving device drives the mechanical trigger device to be in a locked state capable of independently triggering the seat belt retractor.

[0204] It can be understood that when the vehicle speed is less than or equal to the minimum value of the preset speed threshold interval, the vehicle is in a low-speed driving state. At this time, the noise of the mechanical trigger device caused by vehicle vibration is small. At the same time,

[0205] Since the driving device releases the restriction on the mechanical trigger device, energy consumption can be reduced.

[0206] In some embodiments, step S302 can include the following specific steps:

[0207] When the vehicle acceleration is less than or equal to the minimum value of the preset acceleration threshold interval, the electric control driving device drives the mechanical trigger device to be in a locked state capable of independently triggering the seat belt retractor.

[0208] It can be understood that when the vehicle acceleration is less than or equal to the minimum value of the preset acceleration threshold interval, the vehicle is in a stable driving state. At this time, the noise of the mechanical trigger device caused by vehicle vibration is small. At the same time, since the driving device releases the restriction on the mechanical trigger device, energy consumption can be reduced.

[0209] In some embodiments, step S302 can include the following specific steps:

[0210] When the vehicle body angle is less than or equal to the minimum value of the preset vehicle body angle threshold interval, the electric control driving device drives the mechanical trigger device to be in a locked state capable of independently triggering the seat belt retractor.

[0211] It can be understood that when the vehicle body angle is less than or equal to the minimum value of the preset vehicle body angle threshold interval, the vehicle posture is in a relatively stable state, and the vehicle body angle does not trigger the mechanical trigger device to trigger the locking state of the seat belt retractor, thereby reducing energy consumption while ensuring safety.

[0212] The vehicle speed, the vehicle acceleration and the vehicle body angle can be used to determine that the seat belt retractor needs to be in the inhibited state alone or in combination with at least two of them, thereby improving accuracy, safety performance and comfort performance, and reducing energy consumption.

[0213] In some embodiments, step S302 can include the following specific steps:

[0214] When it is perceived according to the environmental obstacle information that there is no obstacle around the vehicle and when the vehicle speed is less than or equal to the minimum value of the preset speed threshold interval and / or the vehicle acceleration is less than or equal to the minimum value of the preset acceleration threshold interval and / or the vehicle body angle is less than or equal to the minimum value of the preset vehicle body angle threshold interval, the electric control driving device drives the mechanical trigger device to be in a state capable of independently triggering the locking state of the seat belt retractor.

[0215] With such a scheme, the environmental obstacle information, the vehicle speed, the vehicle acceleration and the vehicle body angle are comprehensively judged to avoid possible collision risks and improve safety performance.

[0216] In some embodiments, the control method further includes:

[0217] When the electric control driving device is powered off, the seat belt retractor is in a decoupled state to enable the mechanical trigger device to be in a state capable of independently triggering the locking state of the seat belt retractor.

[0218] It can be understood that when the electric control driving device is powered off, the electric control driving device releases the restriction on the mechanical trigger device, and the mechanical trigger device is in a free movement state, and the mechanical trigger device itself triggers the locking state of the seat belt retractor, thereby ensuring safety.

[0219] In some embodiments, the higher the vehicle speed, the lower the maximum value of the preset acceleration threshold interval; the higher the vehicle speed, the lower the maximum value of the preset vehicle body angle threshold interval.

[0220] It can be understood that as the vehicle speed increases, the maximum value of the corresponding threshold interval should also be advanced in consideration of the signal acquisition frequency, the action time of the electromagnetic driving device and other delays, that is, as the speed increases, the maximum value of the preset acceleration threshold interval should also be reduced synchronously.

[0221] For example, when the vehicle speed is 0-60kmh, the maximum value of the preset acceleration threshold interval is 0.45g, and the maximum value of the preset vehicle body angle threshold interval is 27°; when the vehicle speed increases, such as to 100kmh, the maximum value of the preset acceleration threshold interval can be reduced to 0.35g, and the inclination angle is reduced to 20°.

[0222] With such a scheme, the locking is realized in advance, and the total locking time of the seat belt retractor is reduced.

[0223] Referring to FIG. 19, the control method of the application is mainly based on the vehicle control system shown in FIG. 19.

[0224] Among them, MCU (Motor control unit) represents the vehicle microcontroller, which is used as the brain of the vehicle for data processing and logical operation, etc. ECU (Electronic Control Unit) is a driving controller, which is mainly responsible for the control related to the operation of the vehicle. IMU (Inertial Measurement Unit) represents the inertial measurement element, which can mainly detect the motion state of the vehicle. The sensor represents various sensors for detecting the environment of the vehicle, which can include but is not limited to: camera, millimeter wave radar, laser radar, etc. The electromagnetic device refers to the electromagnetic device for driving the slide core in the aforementioned seat belt retractor, that is, the electric control driving device in the control method of the application.

[0225] Specifically, the vehicle obtains the current information of the vehicle during driving, which is generally used to help the user drive or intelligently control the vehicle.

[0226] For the control method of the application, referring to FIG. 20, the main processing flow of the vehicle of the application includes: perception, processing, judgment, decision, and execution.

[0227] Among them, the vehicle obtains the corresponding information from the IMU and other sensors, then the ECU or MCU processes the information, and then judges the processed information, and after various judgments, decides whether to trigger a certain working state of the seat belt retractor, and then enters the execution stage, that is, sends the corresponding electric signal to the seat belt retractor to make it in a certain state.

[0228] More specifically, in the perception stage, the speed, acceleration, vehicle body angle, etc. of the vehicle are perceived to provide signals for subsequent judgment. In the processing stage, the detected signals are filtered. In the judgment stage, the actual signals are analyzed and compared with the set threshold value to provide a basis for the next decision. In the decision stage, the threshold comparison result is received, the actual working condition demand is comprehensively analyzed, and the instruction is given. In the execution stage, the instruction is received, and the triggering action is carried out.

[0229] As a more specific solution, the above control flow is detailed as follows:

[0230] Sensing: The vehicle is powered on, and the sensor senses real-time information about the seat state inside the vehicle, the external vehicle body tilt angle, and the acceleration change information; and the camera sensor senses comprehensive road condition information.

[0231] Processing: There is a lot of harmonic interference information in the sensing signal of the vehicle working condition, which needs to be filtered out to restore the actual working condition as much as possible; (IMU refers to an inertial measurement element that measures the acceleration and attitude of an object) Generally, some filtering operations are performed inside the IMU to ensure the effectiveness of the output information, but considering the high reliability requirement of safety functions, the ECU also needs to perform more and higher-order filtering to further improve the removal of invalid interference (chip computing power requirement); This process will involve a lot of software algorithm optimization, actual working condition environment calibration, etc.

[0232] At the same time, in order to reduce more external interference factors, the installation environment requirements of the product end can also be optimized (sheet metal rigidity, resonance optimization, lightweight), reducing the interference of non-vehicle body state.

[0233] Judgment: After the MCU receives the signal, it will start signal comparison and compare the set threshold value. To ensure reliability, this process will introduce optimization algorithms such as multiple comparisons (such as comparing the threshold value for three times in a row), continuous monitoring (starting from the upper and lower limits of the threshold value for comparison), etc. The automobile microcontroller (MCU) controls the electronic system inside the vehicle (equivalent to the brain of the vehicle, with high processing performance CPU); After signal comparison, working condition judgment data will be generated and recorded for subsequent optimization and fault handling.

[0234] Decision: After the MCU completes signal comparison, it will form the initial version of the working condition judgment, and at the same time, it needs to collect and confirm the driving state of the vehicle (vehicle speed, driving mode, domain control requirements), the seating state of the passengers (whether there is someone, whether the seat belt is buckled, child seat, etc.), whether the vehicle is in a dangerous situation, etc. to comprehensively judge whether to trigger the locking signal.

[0235] Principle: Passing line: meet the regulatory requirements and execute the corresponding locking / unlocking function; Good line: meet the regulatory requirements, and execute the corresponding locking / unlocking function when the passenger has restraint requirements; Excellent line: meet the regulatory requirements, and can perceive the passenger's restraint requirements in advance to execute the corresponding locking / unlocking function in cooperation with more active safety functions.

[0236] Execution: receiving the trigger or unlock signal, through the control of the electromagnetic device power on, power off, slide core to achieve suction and pop, complete the execution of the trigger action or close, at the same time, the ECU will record the execution status, synchronized to the outside send safety belt execution message. (Record working state)

[0237] Referring to FIG. 21, as a typical process of the present application, the control method of the present application specifically includes the following steps:

[0238] S401: monitoring vehicle start information (electromagnetic device power on, system self-checking);

[0239] S402: monitoring the external environment information of the vehicle;

[0240] S403: monitoring vehicle running information (vehicle acceleration, vehicle speed, vehicle body angle);

[0241] S404: vehicle running information is less than the set threshold, control the electromagnetic device to suppress the mechanical trigger; otherwise, the suppression is removed.

[0242] In some embodiments, the above process is described as follows:

[0243] When the vehicle starts, the sensing system monitors the vehicle start signal, performs system self-checking, and the self-checking is normal. The electromagnetic device starts to power on.

[0244] After power on, the electromagnetic device switches to the suppression state. Avoiding the locking situation caused by the vehicle starting on a slope, the seat being at a large angle, and the 0 gravity seat state, resulting in the safety belt not being pulled out, affecting the riding comfort and safety. The current mechanical type retractor is locked when the inclination angle exceeds 27°.

[0245] When the self-checking is not normal, the electromagnetic device is powered off, the slide core is popped out, the suppression of the follow-up pawl is removed, and at this time the traditional mechanical vehicle sensing is restored. At the same time, there should be an audible and visual signal inside the vehicle to prompt the driver that the electronic vehicle sensing is invalid at this time and should be repaired in time.

[0246] When the vehicle is running, the sensing system collects the acceleration, speed, inclination angle, external environment, road conditions and other information of the whole vehicle.

[0247] External environment of the vehicle: facing the complex road conditions in the city, using cameras, millimeter, laser radar and other sensing devices to collect external environment information. When there are people, vehicles, objects, etc. suddenly appearing in front of, behind and around the vehicle, there is a risk of head-on and lateral collision, etc., the vehicle actively (such as triggering emergency braking) or passively decelerates in the next moment, the speed changes sharply, which may cause the driver to have a forward leaning tendency and other dangerous situations. At this time, the locking should be triggered to avoid forward leaning and protect the safety of passengers.

[0248] Acceleration, speed: the current national standard stipulates that the vehicle acceleration must be locked when it reaches 0.45g. At the same time, in order to ensure safety, the length of the belt pulled out should not exceed 45mm. But when using electromagnetic devices for locking, from signal sensing to ECU judgment, execution, and then the electromagnetic device receiving the signal, the slide core and the pop-up all need reaction time. When monitoring the speed of the vehicle is too fast, the electromagnetic device execution mechanism is also required to have faster reaction speed to lock when danger occurs.

[0249] At present, the speed change rate in the national standard is stipulated to be 25-150g / s. At 25g / s, from 0-0.45g, it takes 18ms, and at 150g / s, it only takes 3ms, which leaves less time for electromagnetic devices and signal judgment.

[0250] Therefore, by adopting the advance mechanism, such as triggering the locking signal when the monitored acceleration change reaches 0.2g (actual 0.45g), the signal sensing and electromagnetic device triggering time are also increased, which increases the design reliability. When the perceived acceleration change reaches 0.2g, the speed change is 14.4km / h, that is, the speed is monitored to change more than 14.4km / h within 2s, and the ECU sends a speed to lock.

[0251] At the same time, the current traditional mechanical vehicle is passive locking, from sensing the acceleration change to the belt locking, the total time is about 52ms, which is too long. By using electromagnetic devices, when the speed and acceleration change exceed the set threshold, or through the external camera to sense the sudden appearance of people, vehicles, objects, etc. around the vehicle, which leads to sudden deceleration of the vehicle and other unsafe conditions, active locking is performed. By actively locking in advance, the total locking time is reduced, and the safety is further improved.

[0252] On the road surface with an inclination angle exceeding 27°, the vehicle may roll over, which poses a certain safety risk, and locking should occur at this time.

[0253] When it is perceived that people, vehicles, objects, etc. suddenly appear around the vehicle, there is a risk of lateral and rear collision, which may lead to the driver's forward leaning trend and other dangerous situations, and locking should be triggered at this time to avoid forward leaning and protect the safety of passengers.

[0254] When there is no risk in detecting the external environment, the vehicle running information (such as speed, acceleration, inclination angle) is perceived, and when it exceeds the set threshold, locking should be triggered at this time.

[0255] At this time, the electromagnetic device is powered off, the slide core is popped out, the inhibition of the follow-up pawl is released, and under the action of the steel ball, the follow-up pawl is pushed to rotate to lock the ratchet, and the belt movement is constrained.

[0256] When the ECU determines that there is no dangerous situation outside, at this time the electromagnetic device is energized to retract the plunger, suppress the vehicle feel follow-up pawl, and further suppress the rotation of the steel ball, so as to realize the suppression of the mechanical vehicle feel, thereby ensuring that the safety belt can be normally pulled out for use in the 0-g seat working condition or any seat state, avoiding the false locking of the mechanical vehicle feel in the absence of dangerous situations; at the same time, the vibration noise of the steel ball during movement can be reduced, and the riding comfort is improved.

[0257] Of course, the above steps can be implemented in other application scenarios that are considered to trigger locking, suppression and decoupling.

[0258] Referring to FIG. 22, the control device of the application comprises a collection part and a driving part.

[0259] The collection part is configured to obtain vehicle current information of the vehicle.

[0260] The driving part is at least configured to control the electric control driving device to drive the mechanical trigger device to be in a locked state in which the mechanical trigger device is limited and cannot trigger the safety belt retractor when it is determined that the safety belt retractor needs to be in a suppression state.

[0261] The vehicle current information includes vehicle external environment information and / or vehicle running information.

[0262] The vehicle external environment information includes environmental obstacle information, and the vehicle running information includes one or more of vehicle speed, vehicle acceleration and vehicle inclination angle.

[0263] When the safety belt retractor is in the suppression state, the mechanical trigger device is in a state of being limited to move.

[0264] Specifically, the control method of the application can be executed by an ECU or an MCU, so the MCU or the ECU can both serve as the above-mentioned control device.

[0265] Referring to FIG. 23, the electronic device 800 can include a processing device 801 (such as a central processing unit, a graphics processing unit, etc.) which can perform various appropriate actions and processes according to programs stored in a read-only memory (ROM) 802 or loaded from a storage device 808 to a random access memory (RAM) 803. In the random access memory (RAM) 803, various programs and data required for the operation of the electronic device 800 are also stored. The processing device 801, the ROM 802 and the RAM 803 are connected to each other through a bus 804. An input / output (I / O) interface 805 is also connected to the bus 804.

[0266] Generally, the following devices can be connected to the I / O interface 805: input device(s) 806, including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, and the like; output device(s) 807, including, for example, a Liquid Crystal Display (LCD), a speaker, a vibrator, and the like; storage device(s) 808, including, for example, a magnetic tape, a hard disk, and the like; and communication device(s) 809. The communication device(s) 809 can allow the electronic device 800 to communicate wirelessly or wiredly with other devices to exchange data. While FIG. 23 shows the electronic device 800 with various devices, it is understood that all of the illustrated devices are not required to be implemented or present. More or fewer devices can be implemented or present instead. Each block in FIG. 23 can represent a device or a plurality of devices, as necessary.

[0267] In particular, the processes described above with reference to the flowcharts can be implemented as a computer software program according to some embodiments of the present application. For example, some embodiments of the present application include a computer program product comprising computer instructions embodied on a computer readable medium, the computer instructions comprising program code for executing the methods illustrated by the flowcharts. In some such embodiments, the computer instructions can be downloaded and installed from a network via the communication device 809, or installed from the storage device 808, or installed from the ROM 802. When the computer instructions are executed by the processing device 801, the above-described functions defined in the methods of some embodiments of the present application are performed.

[0268] It is noted that the computer readable medium of some embodiments of the present application can be a computer readable signal medium or a computer readable storage medium or any combination thereof. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or any suitable combination thereof. More specific examples of the computer readable storage medium can include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0269] In some embodiments of the application, a computer readable storage medium can be any tangible medium that contains or stores a program, used by or in connection with an instruction execution system, apparatus, or device. In some embodiments of the application, a computer readable signal medium can include a propagated data signal with computer readable program code embodied therein, for use by or in connection with an instruction execution system, apparatus, or device. The propagated data signal can take any number of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium can be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate or transport program code there within for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable signal medium can be transmitted using any appropriate medium, including but not limited to wireless, wire line, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0270] In some embodiments, the client, server, or both can communicate using any known or future developed network protocols, such as the Hyper Text Transfer Protocol (HTTP), and can be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), the Internet, and an ad hoc network, as well as any current known or future developed networks.

[0271] The computer readable medium described above can be included in the electronic device described above, or can exist separately therefrom. The computer readable medium described above can carry one or more programs, which, when executed by the electronic device, cause the electronic device to control the electrically controlled driving device to drive the mechanical trigger device to the locked state in which the mechanical trigger device is restricted from triggering the seat belt retractor when it is determined that the seat belt retractor needs to be in the inhibited state.

[0272] Computer program code for carrying out operations of some embodiments of the application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0273] The flow diagrams and the block diagrams in the drawings are meant as illustrative representations of the architectures, functions, and operations of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flow diagrams and the block diagrams can represent a module, a procedure, or a part of code, which comprises one or more executable instructions for implementing the specified logical functions.

[0274] It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks may

[0275] For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks may

[0276] The elements described in some embodiments of the present application can be implemented by means of software, and also by means of hardware. The described elements can also be provided in a processor, for example, it can be described that a processor comprises an acquisition unit and a driving unit. In some cases, the name of the element does not constitute a limitation to the element itself, for example, the driving unit can also be described as "an element configured to drive the mechanical trigger device into a locked state in which the mechanical trigger device is restricted from triggering the seat belt retractor when it is determined that the seat belt retractor needs to be in the inhibited state by means of an electrically controlled driving device".

[0277] The functions described above in this document can be performed, at least in part, by one or more hardware logic components. For example, and without limitation, illustrative types of hardware logic components that can be used include Field Programmable Gate Arrays (FPGAs), Application-Specific Integrated Circuits (ASICs), Application-Specific Standard Products (ASSPs), System on Chips (SOCs), Complex Programmable logic devices (CPLDs), etc.

[0278] The application also provides a seat belt retractor system, comprising the electronic device, the electric control driving device and the mechanical triggering device.

[0279] Referring to FIG. 15, the application also provides a vehicle 1, comprising the electronic device or the computer readable medium or the seat belt retractor system.

[0280] In the description of the application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0281] In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0282] The embodiments, implementation manners and related technical features of the application can be combined or replaced with each other without conflict.

[0283] The above is only the preferred embodiment of the application, and does not limit the application in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the application without departing from the technical solution of the application still falls within the scope of the technical solution of the application.

Claims

1. A control method of a seat belt retractor, wherein, The safety belt retractor comprises: a mechanical trigger device configured to mechanically trigger a locking state of the safety belt retractor; an electrically controlled driving device configured to electrically drive the mechanical trigger device; The control method comprises: When it is determined that the safety belt retractor needs to be in the inhibited state, the electrically controlled driving device drives the mechanical trigger device to be in a state of being restricted from triggering the locking state of the safety belt retractor.

2. The control method according to claim 1, wherein The process of determining whether the safety belt retractor needs to be in the inhibited state comprises: obtaining vehicle current information of the vehicle, the vehicle current information comprising at least one of: external environment information of the vehicle, vehicle running information, and vehicle state information; and determining, according to the vehicle current information, whether the safety belt retractor needs to be in the inhibited state.

3. The control method according to claim 2, wherein The external environment information of the vehicle comprises environmental obstacle information, and / or the vehicle running information comprises one or more of vehicle speed, vehicle acceleration, and vehicle body angle, and / or the vehicle state information comprises one or more of driving mode, seat angle, and seat mode.

4. The control method according to claim 3, wherein The vehicle current information comprises the external environment information of the vehicle and / or the vehicle running information, and the determination, according to the vehicle current information, of whether the safety belt retractor needs to be in the inhibited state comprises at least one of the following manners: when it is perceived from the environmental obstacle information that there is no obstacle around the vehicle, it is determined that the safety belt retractor needs to be in the inhibited state; when the vehicle speed is in a preset speed threshold interval, it is determined that the safety belt retractor needs to be in the inhibited state; when the vehicle acceleration is in a preset acceleration threshold interval, it is determined that the safety belt retractor needs to be in the inhibited state; and when the vehicle body angle is in a preset vehicle body angle threshold interval, it is determined that the safety belt retractor needs to be in the inhibited state. The vehicle current information comprises the vehicle state information, and the determination, according to the vehicle current information, of whether the safety belt retractor needs to be in the inhibited state comprises at least one of the following manners:

5. The control method according to any one of claims 3-4, wherein, when the driving mode is in a mode requiring triggering of the inhibited state, it is determined that the safety belt retractor needs to be in the inhibited state; when the seat angle is in a preset seat angle threshold interval, it is determined that the safety belt retractor needs to be in the inhibited state; and when the seat mode is in a zero-gravity seat mode, it is determined that the safety belt retractor needs to be in the inhibited state. The vehicle current information comprises the external environment information of the vehicle, the vehicle running information, and the vehicle state information, and the priority of the determination, based on the external environment information of the vehicle and the vehicle running information, of whether the safety belt retractor needs to be in the inhibited state is higher than the priority of the determination, based on the vehicle state information, of whether the safety belt retractor needs to be in the inhibited state. The control method further comprises:

6. The control method according to any one of claims 2-5, wherein, When it is determined that the safety belt retractor needs to be in the locking state, the electrically controlled driving device drives the mechanical trigger device to be in a state of being forced to trigger and keep the locking state of the safety belt retractor.

7. The control method according to any one of claims 1 to 6, wherein The process of determining whether the safety belt retractor needs to be in the locking state comprises: ​ 8. The control method according to claim 7, wherein ​ obtaining vehicle current information of the vehicle, wherein the vehicle current information comprises: off-vehicle environment information and / or vehicle running information, the off-vehicle environment information comprises: environment obstacle information, and the vehicle running information comprises: one or more of vehicle speed, vehicle acceleration and vehicle body angle; and determining whether the seat belt retractor needs to be in the locked state according to the vehicle current information.

9. The control method according to claim 8, wherein The determining whether the seat belt retractor needs to be in the locked state according to the vehicle current information comprises at least one of the following manners: when the vehicle speed is greater than or equal to the maximum value of a preset speed threshold interval, it is determined that the seat belt retractor needs to be in the locked state; when the vehicle acceleration is greater than or equal to the maximum value of a preset acceleration threshold interval, it is determined that the seat belt retractor needs to be in the locked state; and when the vehicle body angle is greater than or equal to the maximum value of a preset vehicle body angle threshold interval, it is determined that the seat belt retractor needs to be in the locked state.

10. The control method according to any one of claims 1-9, wherein, The control method further comprises: when it is determined that the seat belt retractor needs to be in the decoupled state, the electric control driving device drives the mechanical trigger device to be in a state capable of independently triggering the locked state of the seat belt retractor.

11. The control method according to claim 10, wherein The process of determining whether the seat belt retractor needs to be in the decoupled state comprises: obtaining vehicle current information of the vehicle, wherein the vehicle current information comprises: off-vehicle environment information and / or vehicle running information, the off-vehicle environment information comprises: environment obstacle information, and the vehicle running information comprises: one or more of vehicle speed, vehicle acceleration and vehicle body angle; and determining whether the seat belt retractor needs to be in the decoupled state according to the vehicle current information.

12. The control method according to claim 11, wherein The determining whether the seat belt retractor needs to be in the decoupled state according to the vehicle current information comprises at least one of the following manners: when the vehicle speed is less than or equal to the minimum value of a preset speed threshold interval, it is determined that the seat belt retractor needs to be in the decoupled state; when the vehicle acceleration is less than or equal to the minimum value of a preset acceleration threshold interval, it is determined that the seat belt retractor needs to be in the decoupled state; when the vehicle body angle is less than or equal to the minimum value of a preset vehicle body angle threshold interval, it is determined that the seat belt retractor needs to be in the decoupled state; and when at least one of the following conditions is met: the vehicle speed is less than or equal to the minimum value of a preset speed threshold interval, the vehicle acceleration is less than or equal to the minimum value of a preset acceleration threshold interval, and the vehicle body angle is less than or equal to the minimum value of a preset vehicle body angle threshold interval, and the vehicle surroundings are perceived to be free of obstacles according to the environment obstacle information, it is determined that the seat belt retractor needs to be in the decoupled state.

13. The control method according to any one of claims 1 to 12, wherein The control method further comprises: when the electric control driving device is powered off, the seat belt retractor is in the decoupled state so that the mechanical trigger device is in a state capable of independently triggering the locked state of the seat belt retractor.

14. The control method according to any one of claims 4-13, wherein, The higher the vehicle speed is, the lower the maximum value of the preset acceleration threshold interval is; and / or The higher the vehicle speed is, the lower the maximum value of the preset vehicle body angle threshold interval is.

15. The control method according to any one of claims 1-14, wherein, The mechanical trigger device comprises a follow-up pawl and a vehicle sensing ball, the follow-up pawl is restrained to the vehicle sensing ball to limit position.

16. The control method according to any one of claims 1-15, wherein, The electric control driving device comprises an electromagnetic device.

17. An electronic device, comprising: Comprising: One or more processors and a storage device having stored thereon one or more programs; When the one or more programs are executed by the one or more processors, the processors implement the method as claimed in any one of claims 1 to 16.

18. A computer readable medium having stored thereon computer instructions, wherein, The computer instructions, when executed by a processor, implement the method as claimed in any one of claims 1 to 16.

19. A seat belt retractor system, wherein, Comprising:

20. A vehicle, wherein, The electronic device, the electric control driving device and the mechanical trigger device as claimed in claim 17. Comprising: The electronic device as claimed in claim 17 or the computer readable medium as claimed in claim 18 or the seat belt retractor system as claimed in claim 19.

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