Seat pressure recognition device and vehicle

Abstract

The utility model provides a seat pressure identification device, which belongs to the technical field of pressure monitoring equipment and comprises a flexible shell, a runner pipe and a pressure sensor. The flexible shell is arranged on the seat; the circulating pipe is arranged in the flexible shell; an inner cavity of the runner pipe is filled with fluid; and the pressure sensor is communicated with an inner cavity of the runner pipe and is electrically connected with a whole vehicle control system. According to the seat pressure recognition device provided by the utility model, the pressure sensor is triggered by the flowing of the fluid in the runner pipe, and the flowing of the fluid passes through the whole runner pipe, so that only one pressure sensor is needed, the application cost is reduced under the condition that the requirement of a preset detection area is met, and the seat pressure recognition device is convenient to install. And moreover, the pressure sensor does not have the condition of output signal fluctuation, so that a whole vehicle control system can process the signals more conveniently.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pressure monitoring equipment technical field, more specifically, relate to a seat pressure recognition device and vehicle. BACKGROUND

[0002] The seat pressure sensor is mainly used for identifying whether there is a passenger on the seat, and is matched with signals such as safety belt switch and brake switch, to prevent unexpected power output or movement of the vehicle in the state without the driver, and to avoid accidents.

[0003] The existing seat pressure sensor adopts a laminated structure of multiple layers such as polyester film, silver layer and carbon layer, and a pressure switch is arranged on the polyester film in the middle layer. When the seat is subjected to pressure, the upper and lower carbon layers are in contact, so that the pressure switch is closed, thereby sensing the pressure. However, the stability of the pressure switch is poor, the signal fluctuation is large, and an additional filtering strategy needs to be taken by the controller, resulting in high application cost. Moreover, in order to ensure that the seat detection area meets people with different body characteristics (height, weight, body shape, etc.), more pressure switches need to be used, which makes the manufacturing process complex and further increases the application cost. SUMMARY

[0004] The utility model aims at providing a seat pressure recognition device and vehicle, and aims at solving the technical problems of large measurement signal fluctuation and high application cost in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a seat pressure recognition device, comprising:

[0006] A flexible shell is arranged on the seat cushion.

[0007] A flow pipe is arranged inside the flexible shell; the inner cavity of the flow pipe is filled with fluid; and

[0008] A pressure sensor is in communication with the inner cavity of the flow pipe and is electrically connected with the vehicle control system.

[0009] In a possible implementation manner, the flow pipe is in S-shaped zigzag distribution, one end of the flow pipe is closed, and the other end is open; and the pressure sensor is connected to the open end of the flow pipe.

[0010] In a possible implementation manner, a plurality of buffer bodies are arranged in the inner cavity of the flow pipe; and the buffer bodies abut against the top wall and the bottom wall of the inner cavity of the flow pipe.

[0011] In a possible implementation, the flexible shell comprises an upper film layer and a lower film layer which are buckled together; the upper film layer and the lower film layer enclose a variable cavity, the flow pipe is arranged in the variable cavity, and an outer top wall of the flow pipe is attached to the upper film layer, and an outer bottom wall of the flow pipe is attached to the lower film layer.

[0012] In a possible implementation, the seat pressure recognition device further comprises:

[0013] An adapter is plugged with the flexible shell; the pressure sensor is arranged on the adapter.

[0014] In a possible implementation, the fluid is silicone oil.

[0015] In a possible implementation, the pressure sensor comprises:

[0016] A shell is arranged in the shell;

[0017] An expansion bag is arranged in the shell and communicates with an inner cavity of the flow pipe; and

[0018] A trigger is arranged on the expansion bag and used for triggering the micro switch.

[0019] In some embodiments, the trigger is an elastic sheet structure comprising a connecting portion and a triggering portion which are connected in sequence; the connecting portion is connected to an outer surface of the expansion bag; and the triggering portion protrudes towards the periphery of the expansion bag and is used for triggering the micro switch.

[0020] In some embodiments, the pressure sensor further comprises:

[0021] A resilient body is connected between the trigger and the shell and used for resetting the trigger and the expansion bag.

[0022] The seat pressure recognition device has the following advantages: compared with the prior art, the seat pressure recognition device is laid on a seat cushion, a flow pipe is arranged in the inside of the flexible shell, and an inner cavity of the flow pipe communicates with a pressure sensor; by applying an external force to the seat cushion, the flexible shell and the flow pipe can be deformed, fluid in the flow pipe flows into the pressure sensor to trigger the pressure sensor, and a seat pressure signal is output to a vehicle control system. Since the pressure sensor is triggered by fluid flowing in the flow pipe, and the fluid flow passes through the entire flow pipe, only one pressure sensor needs to be arranged, the application cost is reduced, and the installation is simplified. Moreover, the pressure sensor does not have output signal fluctuation, and the signal processing of the vehicle control system is more convenient.

[0023] The utility model also provides a vehicle, including above-mentioned seat pressure recognition device.

[0024] The vehicle provided by the utility model meets the requirement of the seat pressure preset detection area, simplifies the mounting structure of the seat and the seat pressure recognition device, and reduces the application cost. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to make the technical problems, technical schemes and beneficial effects to be solved in the utility model clearer, the following will be further detailed in combination with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model and not to limit the utility model.

[0026] Figure 1 The structure diagram of the seat pressure recognition device provided in the utility model embodiment is shown in the figure.

[0027] Figure 2 The structure diagram of the seat pressure recognition device provided in the utility model embodiment is shown in the figure. Figure 1 The structure diagram of the seat pressure recognition device provided in the utility model embodiment is shown in the figure.

[0028] Figure 3 The structure diagram of the seat pressure recognition device provided in the utility model embodiment is shown in the figure. Figure 1 ;

[0029] Figure 4 The structure diagram of the seat pressure recognition device provided in the utility model embodiment is shown in the figure. Figure 2 .

[0030] In the figure:

[0031] 1, flexible shell;11, upper film layer;12, lower film layer;

[0032] 2, flow pipe;21, buffer body;

[0033] 3, pressure sensor;31, shell;32, micro switch;33, displacement sensor;34, expansion bag;35, trigger;351, connecting part;352, trigger part;36, rebound body;

[0034] 4, adapter. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical schemes and beneficial effects to be solved in the utility model clearer, the following will be further detailed in combination with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model and not to limit the utility model.

[0036] Please refer to Figure 1 and Figure 2 The seat pressure recognition device provided by the utility model will be described. The seat pressure recognition device comprises a flexible shell 1, a flow pipe 2 and a pressure sensor 3. The flexible shell 1 is arranged on a seat; the flow pipe 2 is arranged inside the flexible shell 1; the inner cavity of the flow pipe 2 is filled with fluid; the pressure sensor 3 is in communication with the inner cavity of the flow pipe 2 and is electrically connected with a vehicle control system.

[0037] The flexible shell 1 can be installed on the surface of the foamed cushion of the vehicle seat or inside the foamed cushion of the vehicle seat. Specifically, it can be fixed by the back adhesive bonding method. The flexible shell 1 has elastic deformation capability, and when it is subjected to pressure at some position, the position will be compressed and deformed.

[0038] The flow pipe 2 is filled inside the flexible shell 1, which can be understood as that the inside of the flexible shell 1 is free of other structures except the flow pipe 2. The flow pipe 2 also has elastic deformation capability. When some position of the flexible shell 1 is deformed, the corresponding position of the flow pipe 2 will be compressed and deformed, so that the fluid inside the flow pipe 2 flows.

[0039] Preferably, the flow pipe 2 is a flat pipe, which has a small thickness and can avoid rolling when pressure is applied thereto.

[0040] The flow pipe 2 extends and distributes along the front-rear direction of the seat and / or along the left-right direction of the seat, preferably, the flow pipe 2 is partially located at the front part of the seat cushion, that is, the detection area of the seat pressure recognition device covers most of the seat cushion, so as to meet the sitting habits of people with different body characteristics (height, weight, body shape, etc.).

[0041] It should be noted that, since the flow pipe 2 is filled inside the flexible shell 1, in order to facilitate understanding of the distribution of the flow pipe 2, Figure 1 the flow pipe 2 in the figure is represented by a dashed line.

[0042] The pressure sensor 3 is connected with the inner cavity of the flow pipe 2, and the two form a closed cavity. In the case that the seat cushion is not subjected to pressure, the flexible shell 1 and the flow pipe 2 are in normal state, and the pressure sensor 3 will not be triggered; when the seat cushion is subjected to pressure, some part of the flexible shell 1 is deformed and compresses the flow pipe 2, so that the fluid in the flow pipe 2 flows into the pressure sensor 3, so that the pressure sensor 3 is triggered and transmits a pressure signal to the vehicle control system.

[0043] Compared with the prior art, the seat pressure recognition device provided by the utility model, since the pressure sensor 3 is triggered by fluid flow in the flow pipe 2, and the fluid flow will pass through the whole flow pipe 2, therefore, only one pressure sensor 3 needs to be arranged in the embodiment, the application cost is reduced under the requirement of meeting the preset detection area, and the installation is convenient. Moreover, the pressure sensor 3 will not appear the output signal fluctuation condition, and the signal processing of the whole vehicle control system is more convenient.

[0044] The working condition of the seat pressure recognition device is that the vehicle is in the network wake-up or the low-voltage electric mode is in the ON gear mode.

[0045] The whole vehicle control system outputs the working power supply to the seat pressure recognition device, and the seat pressure recognition device is in the working state. When the driver and the passenger get on the vehicle and sit on the seat, the certain part of the flexible shell 1 is deformed, and the flow pipe 2 is compressed, so that the fluid in the flow pipe 2 flows into the pressure sensor 3, so that the pressure sensor 3 is triggered, and the pressure signal is transmitted to the whole vehicle control system. After the whole vehicle control system identifies the signal state, it is determined whether the driver or the passenger is on the seat.

[0046] If it is found that the driver starts the vehicle, and the safety belt is not buckled, or the safety belt of the certain passenger is not buckled, the whole vehicle control system immediately informs the driver to buckle the safety belt through the instrument indicator light and the prompt sound. If the driver still does not buckle the safety belt, the vehicle can be limited to prohibit gear shifting or limited power output.

[0047] If the whole vehicle control system first identifies that the driver buckles the safety belt, and then detects the pressure signal, it is indicated that the safety belt switch mechanism appears the fault, or the driver exists the illegal operation behavior, and the whole vehicle control system will record the corresponding fault information.

[0048] After the vehicle is parked and the engine is turned off, the power supply mode is switched to the OFF gear, and the network is in the sleep state, the whole vehicle control system stops the working power supply output of the seat pressure recognition device, and the seat pressure recognition device stops working.

[0049] In some embodiments, the distribution of the flow pipe 2 can adopt the structure as shown in Figure 1 , referring to Figure 1 , the flow pipe 2 is distributed in the S-shaped zigzag mode, one end of the flow pipe 2 is closed, and the other end is conducted; the pressure sensor 3 is connected to the conducted end of the flow pipe 2.

[0050] The flow pipe 2 is in S-shaped meandering distribution, which can increase the layout area of the flow pipe 2, and thus ensure that the detection area of the seat meets the preset requirements, so as to meet the driving needs of personnel with different body characteristics. Moreover, when the driver or passenger changes the posture and moves on the seat cushion, for example, moves in the front-rear direction, as long as the flow pipe 2 is pressed at some place, the triggering of the pressure sensor 3 can be maintained, and the pressure sensor 3 will not have output signal fluctuation, which is more convenient for the vehicle control system to process the pressure signal.

[0051] Preferably, the flow pipe 2 extends and bends along the left-right direction and the front-rear direction of the seat, and the closed end of the flow pipe 2 is located at the head of the seat cushion, and the open end is located at the tail of the seat cushion. In addition, at the head of the seat cushion, the flow pipe 2 has at least two parts extending in the left-right direction, that is, the flow pipe 2 is distributed in a larger area at the head of the seat, so as to adapt to the driver or passenger with a thin body or a short height and a forward sitting posture. In the middle and tail of the seat cushion, the distribution area of the flow pipe 2 can be appropriately reduced.

[0052] The pressure sensor 3 is connected to the open end of the flow pipe 2, that is, the pressure sensor 3 is located at the tail of the seat cushion and can be protected by the seat back to avoid damage when subjected to strong external force.

[0053] It should be noted that the flexible shell 1 can also be in S-shaped meandering distribution, or the inner cavity can be in S-shaped meandering distribution; the specific structure of the flexible shell 1 is determined according to the structure of the seat cushion and the mounting form of the seat cushion.

[0054] In some embodiments, the above-mentioned flow pipe 2 can also adopt the structure as shown in Figure 1 and Figure 2 , referring to Figure 1 and Figure 2 , a plurality of buffer bodies 21 are arranged in the inner cavity of the flow pipe 2; the buffer bodies 21 abut against the top wall and the bottom wall of the inner cavity of the flow pipe 2.

[0055] It should be noted that the buffer bodies 21 are arranged in the inner cavity of the flow pipe 2, and the flow pipe 2 is arranged in the inner cavity of the flexible shell 1, so the flow pipe 2 and the buffer bodies 21 cannot be seen from the appearance of the seat pressure identification device, and Figure 1 in FIG. 4, the flow pipe 2 and the buffer bodies 21 are indicated by dashed lines, which are only used to illustrate the distribution form of the flow pipe 2 and the positions of the plurality of buffer bodies 21.

[0056] The buffer bodies 21 abut against the top wall and the bottom wall of the inner cavity of the flow pipe 2, and the two side walls of the flow pipe 2 are both concave curved surfaces. When the flow pipe 2 is deformed at some place under pressure, the corresponding buffer body 21 also deforms under pressure, and when the external force disappears, the buffer body 21 can restore itself to support the flow pipe 2 to quickly restore the original state, so as to maintain the stability of the internal pressure change of the flow pipe 2.

[0057] In addition, the buffer body 21 also plays a role of buffering compression. If the seat cushion is subjected to strong downward pressure, the flexible shell 1 deforms at some place, and the buffer body 21 can absorb part of the pressure to avoid large deformation of the flow pipe 2, reduce the impact on the fluid, thereby ensuring stable fluid flow and reducing the pressure variation difference in the inner cavity of the flow pipe 2.

[0058] In some embodiments, the flexible shell 1 described above can adopt a structure as shown in FIG. 1, which will be described below with reference to FIG. 1. Figure 1 Figure 1 The flexible shell 1 includes an upper film layer 11 and a lower film layer 12 that are buckled together. The upper film layer 11 and the lower film layer 12 enclose a variable cavity, and the flow pipe 2 is arranged in the variable cavity. The outer top wall of the flow pipe 2 is attached to the upper film layer 11, and the outer bottom wall of the flow pipe 2 is attached to the lower film layer 12.

[0059] The upper film layer 11 has an upper protruding portion protruding upward, and the lower film layer 12 has a lower protruding portion protruding downward. The upper protruding portion and the lower protruding portion are in vertical connection to form the variable cavity. The variable cavity is an S-shaped winding cavity that is adapted to the distribution mode of the flow pipe 2. The two side edges of the upper protruding portion are connected to the two side edges of the lower protruding portion, so that the variable cavity becomes a closed cavity, and the flow pipe 2 is wrapped in the variable cavity to avoid rolling of the flow pipe 2 when subjected to pressure.

[0060] The upper film layer 11 and the lower film layer 12 can enclose the variable cavity. The variable cavity can deform according to the change of the internal fluid pressure. When the fluid pressure increases, the cavity expands; when the fluid pressure decreases, the cavity shrinks. Therefore, the flexible shell 1 can adapt to different pressure changes to avoid rupture or leakage caused by excessive pressure. In addition, the elastic deformation of the variable cavity can absorb external impact or vibration to reduce the direct force on the internal flow pipe 2, thereby protecting the structural integrity and functional stability of the flow pipe 2.

[0061] The upper film layer 11 and the lower film layer 12, as the main components of the flexible shell 1, are usually made of lightweight materials, so that the overall weight of the flexible shell 1 is relatively light. In addition, the film structure has good flexibility and durability, can maintain stable performance in repeated deformation, and prolong the service life of the flexible shell 1.

[0062] Preferably, the materials of the upper film layer 11 and the lower film layer 12 are polyester film, which has high tensile strength and tear resistance, can withstand large mechanical stress, and ensures the structural integrity of the flexible shell 1. In addition, it has excellent wear resistance and fatigue resistance, is suitable for long-term use, and prolongs the service life of the flexible shell 1.

[0063] ​The flexible shell 1 is embedded in the seat cushion foam, and the measurement accuracy of the pressure sensor 3 is not affected by the installation position of the flexible shell 1.

[0064] In some embodiments, the seat pressure identification device described above can also adopt the structure as shown in Figure 1 , and as shown in Figure 1 , the seat pressure identification device further comprises an adapter 4. The adapter 4 is plugged with the flexible shell 1 and electrically connected with the vehicle control system; the pressure sensor 3 is arranged on the adapter 4.

[0065] The adapter 4 is used to assemble the pressure sensor 3. In the first aspect, the pressure sensor 3 can be arranged inside the adapter 4 to be protected by the adapter 4. In the second aspect, the adapter 4 can quickly connect the vehicle wire harness to realize the quick electrical connection between the pressure sensor 3 and the vehicle control system. In the third aspect, the adapter 4 is plugged with the flexible shell 1, and the assembly method is simple and fast. If the pressure sensor 3 is damaged, the pressure sensor 3 can be quickly replaced by disassembling the adapter 4.

[0066] In some embodiments, the fluid is silicone oil. Silicone oil has excellent heat resistance, electrical insulation, weather resistance, hydrophobicity, physiological inertia and small surface tension, in addition to low viscosity-temperature coefficient and high compression resistance, which can form smooth flow in the flow pipe 2.

[0067] In some embodiments, the pressure sensor 3 described above can adopt the structure as shown in Figure 3 and Figure 4 , and as shown in Figure 3 and Figure 4 , the pressure sensor 3 comprises a shell 31, an expansion bag 34 and a trigger 35. The shell 31 is provided with a micro switch 32; the expansion bag 34 is arranged in the shell 31 and communicates with the inner cavity of the flow pipe 2; the trigger 35 is arranged on the expansion bag 34 and used to trigger the micro switch 32.

[0068] The micro switch 32 is electrically connected with the vehicle control system. When the seat cushion is pressed, the flexible shell 1 deforms at some place and compresses the flow pipe 2 at the corresponding position, the fluid in the flow pipe 2 flows into the expansion bag 34, the volume of the expansion bag 34 increases and drives the trigger 35 to move to contact the micro switch 32, as shown in Figure 4 , so that the micro switch 32 is turned on and the pressure sensor 3 is turned on. When the external pressure of the seat cushion disappears, the flexible shell 1 and the flow pipe 2 return to the original state, the silicone oil in the expansion bag 34 flows back to the flow pipe 2, the expansion bag 34 resets and drives the trigger 35 to move away from the micro switch 32, as shown in Figure 3 , the micro switch 32 is turned off and the pressure sensor 3 is turned off.

[0069] The trigger 35 is arranged on the inflation bag 34, and the inflation bag 34 is inflated / reset to drive the trigger 35 to move, so as to trigger / disengage the micro switch 32. The on / off mode of the micro switch 32 is simple and reliable.

[0070] In addition, the displacement sensor 33 can also be arranged in the shell 31, and the trigger 35 can trigger the displacement sensor 33.

[0071] In some embodiments, the trigger 35 can have a structure as shown in Figure 3 and Figure 4 , and as shown in Figure 3 and Figure 4 , the trigger 35 is in an elastic sheet structure, and includes a connecting portion 351 and a triggering portion 352 connected in sequence; the connecting portion 351 is connected to the outer surface of the inflation bag 34; and the triggering portion 352 protrudes to the periphery of the inflation bag 34, and is used to trigger the micro switch 32.

[0072] The trigger 35 is in an elastic sheet structure, and has an anti-deformation capability. Only when the internal pressure of the inflation bag 34 reaches a certain threshold value, the trigger 35 can move along with the inflation bag 34 to trigger the micro switch 32 and the displacement sensor 33. In addition, the elastic sheet can also play a damping role, so as to prevent a large amount of silicon oil from being rapidly filled into the inflation bag 34, and a large impact on the micro switch 32 and the displacement sensor 33, and reduce signal fluctuation. Furthermore, the connecting portion 351 is wrapped on the outer surface of the inflation bag 34, and plays a protection role on the inflation bag 34, so as to avoid damage of the inflation bag 34.

[0073] In some embodiments, the pressure sensor 3 can also have a structure as shown in Figure 3 and Figure 4 , and as shown in Figure 3 and Figure 4 , the pressure sensor 3 further includes a rebound body 36. The rebound body 36 is connected between the trigger 35 and the shell 31, and is used to reset the trigger 35 and the inflation bag 34.

[0074] Specifically, one end of the rebound body 36 is connected with the connecting portion 351, and the other end is connected with the inner wall of the shell 31. When the seat cushion is pressed and the inflation bag 34 is deformed, the trigger 35 moves and compresses the rebound body 36, so that the rebound body 36 stores energy. When the external force of the seat cushion disappears, the silicon oil flows back to the flow pipe 2 from the inflation bag 34, the volume of the inflation bag 34 becomes smaller, and the trigger 35 is driven to move. At the same time, the rebound body 36 releases energy, so as to ensure that the trigger 35 returns to the original position, and then ensure that the inflation bag 34 shrinks to the original state.

[0075] Based on the same inventive concept, the embodiments of the present application also provide a vehicle including the seat pressure identification device.

[0076] The vehicle provided by the utility model has the seat pressure recognition device, meets the requirement of the seat pressure preset detection area, simplifies the mounting structure of the seat and the seat pressure recognition device, and reduces the application cost.

[0077] The above merely describes the preferred embodiments of the utility model, and is not intended to limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A seat pressure recognition device, characterized by, The application relates to a seat pressure recognition device. The seat pressure recognition device comprises: a flexible shell (1) arranged on a seat cushion; a flow pipe (2) arranged in the flexible shell (1); an inner cavity of the flow pipe (2) filled with a fluid; and 2. The seat pressure identification apparatus of claim 1, wherein a pressure sensor (3) in communication with the inner cavity of the flow pipe (2) and electrically connected with a vehicle control system.

3. The seat pressure identification apparatus of claim 1, wherein The flow pipe (2) is in an S-shaped zigzag distribution, one end of the flow pipe (2) is closed, and the other end is open; and the pressure sensor (3) is connected to the open end of the flow pipe (2).

4. The seat pressure identification apparatus of claim 1, wherein A plurality of buffer bodies (21) are arranged in the inner cavity of the flow pipe (2); and the buffer bodies (21) abut against the top wall and the bottom wall of the inner cavity of the flow pipe (2).

5. The seat pressure identification apparatus of claim 1, wherein The flexible shell (1) comprises an upper film layer (11) and a lower film layer (12) which are buckled together; the upper film layer (11) and the lower film layer (12) form a variable cavity, the flow pipe (2) is arranged in the variable cavity, the outer top wall of the flow pipe (2) is attached to the upper film layer (11), and the outer bottom wall of the flow pipe (2) is attached to the lower film layer (12). The seat pressure recognition device further comprises:

6. The seat pressure identification apparatus of claim 1, wherein an adapter (4) plugged with the flexible shell (1); and the pressure sensor (3) is arranged on the adapter (4). The pressure sensor (3) comprises: a shell (31) in which a micro switch (32) is arranged; an expansion bag (34) arranged in the shell (31) and in communication with the inner cavity of the flow pipe (2); and 7. The seat pressure identification apparatus of claim 6, wherein a trigger (35) arranged on the expansion bag (34) and used for triggering the micro switch (32).

8. The seat pressure identification apparatus of claim 6, wherein The trigger (35) is in an elastic sheet structure and comprises a connecting portion (351) and a triggering portion (352) which are connected in sequence; the connecting portion (351) is connected to the outer surface of the expansion bag (34); and the triggering portion (352) protrudes outwardly from the periphery of the expansion bag (34) and is used for triggering the micro switch (32). The pressure sensor (3) further comprises:

9. The seat pressure identification apparatus of claim 1, wherein a rebound body (36) connected between the trigger (35) and the shell (31) and used for resetting the trigger (35) and the expansion bag (34).

10. A vehicle characterized by comprising: The fluid is silicone oil. The application further discloses a seat pressure recognition device. The application further discloses a seat pressure recognition device.

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