Pressure sensor for automobile collision experiment

Abstract

The utility model discloses a pressure sensor for an automobile collision experiment, which comprises an outer shell, a circuit board, an elastic element and a cover body, one end of the outer shell is provided with a wiring part, the bottom of the outer shell is provided with an induction part, the induction part comprises an air bag interface and a communicating pipe, one end of the air bag communicating pipe is communicated with the outside and is communicated with the air bag interface; the other end of the air bag communicating pipe extends into the outer shell, a supporting rod is arranged in the outer shell, the circuit board is arranged in the outer shell, the bottom of the circuit board is supported by the supporting rod, an elastic element is attached to the bottom of the circuit board, and the end, extending into the outer shell, of the air bag communicating pipe abuts against the bottom of the elastic element. An opening groove is formed in the upper portion of the outer shell, the cover body covers the upper portion of the opening groove, and the lower portion of the cover body abuts against the upper portion of the circuit board. According to the scheme, the impact pressure can be further accurately judged by sensing the pressure change of the air bag.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of automobile crash technology, specifically relates to a pressure sensor for automobile crash experiment. BACKGROUND

[0002] The collision accident in the running process of the vehicle can cause great damage to the vehicle and personnel, in order to reduce the damage of the collision to the vehicle, the front and rear of the vehicle are generally provided with bumpers, the automobile bumper is a safety device for absorbing and reducing external impact force and protecting the front and rear of the vehicle body, and the bumper can play a good protection role on the vehicle when the vehicle hits the obstacle out of control. Therefore, it is usually necessary to carry out the collision experiment on the vehicle to detect the quality of the automobile bumper, and in order to collect the collision pressure data, the pressure sensor for collision is essential.

[0003] The Chinese patent with the application number 2021210281543 discloses a vehicle-mounted collision pressure monitoring device. It comprises a collision rod, a fixing seat, a shock absorber, a pressure sensor and a detection transmission module, characterized in that: the monitoring device is installed at the front end of the automobile bumper through the fixing seat, the collision rod is connected to the fixing seat, the shock absorber is arranged between the collision rod and the fixing seat, one end of the shock absorber is fixed to the fixing seat, the other end of the shock absorber is connected to the collision rod, the pressure sensor is arranged between the shock absorber and the collision rod, and the detection signal of the pressure sensor is uploaded to the vehicle-mounted central control system through the detection transmission module. The utility model has the characteristics of early warning protection, improving the protection function of the bumper and reducing the damage of the bumper during the collision.

[0004] The pressure sensor of the monitoring device in the above-mentioned scheme is consistent with the prior art, and data is collected by directly sensing the pressure of the collision rod, but since the sensing area range of the pressure sensor is limited, if the position of the pressure sensor is incorrect after the collision rod is impacted, it is difficult to reflect the accurate impact pressure. UTILITY MODEL CONTENTS

[0005] The utility model provides a pressure sensor for automobile crash test, including shell, circuit board, elastic element and lid, one end of shell is equipped with wiring part, the bottom of shell is equipped with response part, the response part includes air bag interface and communication pipe, air bag communication pipe one end communicates outside and with air bag interface intercommunication, air bag communication pipe extends another end and extends to the inside of shell, the inside of shell is equipped with support rod, circuit board sets up in the inside of shell and the bottom of circuit board is supported by support rod, the bottom of circuit board is pasted with elastic element, the one end of air bag communication pipe that extends to the inside of shell and the bottom of elastic element are opposite, the top of shell is equipped with opening groove, the lid is covered in the top of opening groove and the top of circuit board is opposite with the top of circuit board, be equipped with locking assembly between lid and opening groove, locking assembly locks the lid on opening groove.

[0006] Preferably, the bottom surface of the lid is provided with a groove around the periphery, the groove is provided with an elastic assembly, the elastic assembly includes an elastic arm, there is a gap between the top of the elastic arm and the back of the groove, the bottom of one end of the elastic arm is provided with a stop column, the bottom of the stop column is in contact with the circuit board.

[0007] Preferably, the part of the air bag communication pipe extending into the shell is connected with a sealing sleeve outside, the sealing sleeve extends into the circuit board.

[0008] Preferably, the shell is provided with a connecting part at both ends, the connecting part is provided with a connecting hole, and a reinforcing rib is arranged between the side wall of the shell and the connecting part.

[0009] Preferably, the locking assembly includes a locking block fixed on the inner side arm of the opening groove, the locking block is provided with a locking groove, and a locking bolt hole is provided on the lid.

[0010] The utility model has the advantages of:

[0011] 1. The scheme can more effectively capture the pressure change during automobile crash test, no matter the angle of collision, the air bag can uniformly convert the impact force into air pressure, thereby improving the accuracy and comprehensiveness of pressure sensing.

[0012] 2. The design of the elastic assembly not only helps to fix the circuit board, but also can absorb and disperse the impact force during the collision process to some extent. This helps to enhance the impact resistance of the elastic element and reduce the risk of damage during the collision process.

[0013] 3. The part of the air bag communication tube extending into the outer shell is externally connected with a sealing sleeve, which not only plays a sealing role, but also enhances the connection strength between the communication tube and the outer shell to a certain extent. This helps to prevent the communication tube from loosening or breaking during the collision process, thereby improving the overall structural strength of the elastic element. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure diagram of the utility model.

[0015] Figure 2 It is a cover structure diagram of the utility model.

[0016] Figure 3 It is a sectional structure diagram of the utility model.

[0017] In the figure: 1 outer shell, 2 circuit board, 3 elastic element, 4 cover, 5 wiring part, 6 air bag interface, 7 communication tube, 8 support rod, 9 opening slot, 10 recess, 11 elastic arm, 12 abutment column, 13 sealing sleeve, 14 connecting part, 15 connecting hole, 16 reinforcing rib, 17 locking block, 18 locking slot, 19 locking bolt hole. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0019] In the description of the utility model, it should be explained that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation of the utility model.

[0020] In the description of the utility model, it is necessary to explain that, unless another explicit provision and limitation, the term "installation", "set with", "connection" and so on, should do broad sense understanding, for example "connection", can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be the communication inside two elements. At the same time, when the element is called "fixed to" or "set to" another element, it can be directly on another element or possibly exist simultaneously with the intermediate element. When an element is called "connected to" another element, it can be directly connected to another element or possibly exist simultaneously with the intermediate element. When an element is called "fixedly connected to" another element, it can be fixedly connected in a common way such as welding or bolt connection or adhesive connection. In short, for ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0021] Embodiment 1, as Figures 1-3 The utility model provides a pressure sensor for automobile crash experiment, it includes shell body 1, circuit board 2, elastic element 3 and cover 4, one end of shell body 1 is equipped with wiring part 5, wiring part 5 is used for carrying out electrical connection with external terminal, the bottom of shell body 1 is equipped with inductive part, and the inductive part includes air bag interface 6 and communication pipe 7, air bag interface 6 is used for communicating with air bag, the air bag in this embodiment detects the impact pressure generated by collision by the pressure change of inductive air bag, and the air bag is installed on the side wall of the collision rod.

[0022] Combining Figure 3 Air bag communication pipe 7 one end communicates outside and communicates with air bag interface 6, air bag communication pipe 7 extends to the inside of shell body 1 at the other end, the inside of shell body 1 is equipped with support rod 8, and circuit board 2 is arranged in the inside of shell body 1 and the bottom of circuit board 2 is supported by support rod 8, the bottom of circuit board 2 is attached with elastic element 3, and the end of air bag communication pipe 7 extending to the inside of shell body 1 is in abutment with the bottom of elastic element 3. The upper portion of shell body 1 is equipped with open slot 9, cover 4 is covered on the upper portion of open slot 9 and the lower portion of cover 4 is in abutment with the upper portion of circuit board 2, and locking assembly is arranged between cover 4 and open slot 9, and locking assembly locks cover 4 on open slot 9.

[0023] When the impact rod is hit, regardless of the angle of impact, the impact rod will transmit the impact force to the air bag, and the air bag will be deformed and contracted under the impact force, so that the gas inside is squeezed, and the squeezed gas transmits the air pressure to the elastic element 3 through the communication pipe 7. The elastic element 3 is deformed after being pressed, and the deformation is then converted into an electrical signal by the sensitive element and transmitted to the circuit board 2. The circuit board 2 transmits the signal to the external terminal through the wiring for collection. It can more effectively capture the pressure change during the collision. Regardless of the angle of impact, the air bag can uniformly convert the impact force into air pressure, thereby improving the accuracy and comprehensiveness of the pressure sensing.

[0024] In combination Figure 2 , the bottom of the cover 4 is provided with a groove 10, and the elastic assembly is arranged in the groove 10. The elastic assembly includes an elastic arm 11, and there is a gap between the upper part of the elastic arm 11 and the back of the groove 10. A stop post 12 is arranged below one end of the elastic arm 11, and the lower part of the stop post 12 abuts against the circuit board 2. After the cover 4 is closed, the stop post 12 abuts against the circuit board 2 downward, firmly fixing the circuit board 2 on the support rod 8, preventing it from shaking or moving during the collision. This helps to improve the stability and fixation of the circuit board 2, ensuring the stable transmission of the electrical signal. When the air bag is subjected to the impact force and the gas is squeezed, the air pressure is transmitted to the elastic element 3 through the communication pipe 7. Under the action of the elastic assembly, the circuit board 2 is subjected to downward pressure, and then the elastic element 3 is subjected to a more uniform and stable pressure distribution. This helps to optimize the pressure state of the elastic element 3, improve its sensitivity and accuracy to the change of air pressure. In addition, the design of the elastic assembly not only helps to fix the circuit board 2, but also can absorb and disperse the impact force to a certain extent during the collision. This helps to enhance the impact resistance of the elastic element 3 and reduce the risk of damage during the collision.

[0025] In combination Figure 3 , the part of the air bag communication pipe 7 extending into the outer shell 1 is externally connected with a sealing sleeve 13, and the upper part of the sealing sleeve 13 extends into the circuit board 2. The close fit between the sealing sleeve 13 and the circuit board 2 can further ensure that the air pressure transmission channel inside the elastic element 3 is not disturbed by the outside world, ensuring the accuracy and stability of the measurement. The sealing sleeve 13 not only plays a sealing role, but also can enhance the connection strength between the communication pipe 7 and the outer shell 1 to a certain extent. This helps to prevent the communication pipe 7 from loosening or breaking during the collision, thereby improving the overall structural strength of the elastic element 3.

[0026] In combination Figure 1The outer two ends of the outer shell 1 are provided with connecting portions 14, the connecting portions 14 are provided with connecting holes 15, and reinforcing ribs 16 are arranged between the side walls of the outer shell 1 and the connecting portions 14, the connecting portions 14 are used for connecting the outer shell 1 with corresponding components, and the reinforcing ribs 16 further enhance the structural strength of the connecting portions 14, so that the connecting portions 14 can withstand greater impact force, thereby improving the connection stability of the entire elastic element 3.

[0027] The locking assembly comprises locking blocks 17 fixed on the inner side arms of the opening grooves 9, the locking blocks 17 are provided with locking grooves 18, and the cover body 4 is provided with locking bolt holes 19 corresponding to the locking grooves 18.

[0028] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure sensor for automobile crash testing, characterized in that: The device includes an outer shell (1), a circuit board (2), an elastic element (3), and a cover (4). One end of the outer shell (1) has a wiring portion (5), and the bottom of the outer shell (1) has a sensing portion. The sensing portion includes an airbag interface (6) and a connecting tube (7). One end of the airbag connecting tube (7) is connected to the outside and to the airbag interface (6). The other end of the airbag connecting tube (7) extends into the interior of the outer shell (1). A support rod (8) is provided inside the outer shell (1). The circuit board (2) is located inside the outer shell (1). The bottom of the circuit board (2) is supported by a support rod (8). An elastic element (3) is attached to the bottom of the circuit board (2). One end of the airbag connecting tube (7) extends into the outer shell (1) and abuts against the bottom of the elastic element (3). An opening groove (9) is provided on the top of the outer shell (1). The cover (4) covers the opening groove (9) and the bottom of the cover (4) abuts against the top of the circuit board (2). A locking component is provided between the cover (4) and the opening groove (9). The locking component locks the cover (4) onto the opening groove (9).

2. The pressure sensor for automobile collision testing according to claim 1, characterized in that: The bottom surface of the cover (4) is provided with a groove (10) around the perimeter. An elastic component is provided in the groove (10). The elastic component includes an elastic arm (11). There is a gap between the upper part of the elastic arm (11) and the back of the groove (10). A stop post (12) is provided below one end of the elastic arm (11). The lower part of the stop post (12) abuts against the circuit board (2).

3. The pressure sensor for automobile collision testing according to claim 2, characterized in that: The portion of the airbag connecting tube (7) extending into the outer shell (1) is externally connected to a sealing sleeve (13), and the upper part of the sealing sleeve (13) extends into the circuit board (2).

4. The pressure sensor for automobile collision testing according to claim 3, characterized in that: The outer shell (1) has connecting parts (14) at both ends, connecting holes (15) on the connecting parts (14), and reinforcing ribs (16) between the side wall of the outer shell (1) and the connecting parts (14).

5. The pressure sensor for automobile collision testing according to claim 4, characterized in that: The locking assembly includes a locking block (17) fixed on the inner arm of the opening groove (9), the locking block (17) is provided with a locking groove (18), and the cover (4) is provided with a corresponding locking bolt hole (19).

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