A device for CPD manikin respiratory motion

Abstract

The application discloses a device for CPD dummy breathing movement, and relates to the technical field of in-vehicle living body detection targets, which is arranged in a chest cavity of a CPD dummy and comprises a driving motor, a driving gear, a driving rack, a sliding shaft mounting seat, a linear motion bearing, a sliding shaft and a breathing push plate. The driving motor is fixed with the driving gear through a driving shaft thereof, the driving rack is fixed on the sliding shaft in an axial direction, the driving gear is engaged with the driving rack, the sliding shaft is slidably connected with the sliding shaft mounting seat through the linear motion bearing, and the breathing push plate is fixed on one side of the sliding shaft. The driving motor drives the driving gear to rotate clockwise or counterclockwise, and drives the sliding shaft to move linearly through the meshing transmission of the gear and the rack, so that the breathing movement of the dummy is realized. The technical scheme of the application adopts the motor driving and gear and rack transmission mode to realize the breathing movement simulation, has small operation difficulty and good flexible adjustment, and can be applied to application scenes with high requirements on breathing frequency and amplitude.

Description

Technical Field

[0001] This utility model relates to the technical field of in-vehicle live detection targets, and more specifically, to a device for the respiratory movement of a CPD dummy. Background Technology

[0002] In recent years, there have been frequent tragedies of children being forgotten in cars, raising widespread public concern about in-vehicle safety. To prevent such tragedies, in-vehicle liveness detection technology has emerged, aiming to ensure that no living beings are left inside vehicles through intelligent monitoring.

[0003] With the continuous advancement of intelligent vehicle technology, an increasing number of sensors and intelligent devices are being applied to automobiles, providing a hardware foundation for the development of in-vehicle liveness detection technology. Simultaneously, the rapid development of technologies such as big data and artificial intelligence has significantly improved the accuracy and reliability of in-vehicle liveness detection technology. Among these technologies, the most critical is respiratory detection. Therefore, to meet the requirements of in-vehicle CPD liveness detection, realistic breathing movements are crucial for successful detection.

[0004] Existing respiratory motion simulation devices suffer from drawbacks such as complex structure, high cost, and inability to dynamically adjust the frequency according to actual needs. In addition, most existing respiratory motion simulation devices are based on passive motion methods, such as using common methods like pull wires and torsion springs. These methods are difficult to operate when implementing respiratory motion in live detection and are prone to interfering with the detection equipment, affecting the accuracy of the final detection results. Utility Model Content

[0005] The purpose of this invention is to provide a breathing motion simulation device that can meet the requirements of real-world vehicle liveness detection, so as to simulate the breathing movements of a real child and solve the defects of existing breathing motion simulation devices, such as complex structure, high cost, poor flexibility and adjustability, and easy interference with detection equipment, thereby assisting in the completion of vehicle liveness detection.

[0006] The technical solution of this utility model is: a device for breathing movement of a CPD dummy is provided. The device is set in the chest cavity of the CPD dummy and includes: a drive motor, a drive gear, a drive rack, a sliding shaft mounting base, a sliding shaft, and a breathing push plate.

[0007] The drive motor includes a motor drive shaft, and the drive motor is fixedly connected to the drive gear through its motor drive shaft. The drive rack is fixed axially on the sliding shaft. The drive gear meshes with the drive rack. The sliding shaft is slidably connected to the sliding shaft mounting base. The breathing push plate is connected to the end face of one side of the sliding shaft.

[0008] The drive motor is used to drive the drive gear to rotate clockwise or counterclockwise, and through the meshing transmission between the drive gear and the drive rack, it drives the sliding shaft to slide along the sliding shaft mounting seat, thereby moving the breathing push plate back and forth to realize the dummy's breathing movement.

[0009] Furthermore, the device also includes a motor mounting base;

[0010] The motor mounting base is provided with a through hole for the motor drive shaft to pass through. The drive motor is mounted on the motor mounting base, and the motor drive shaft passes through the through hole and is connected to the drive gear.

[0011] Furthermore, the motor mounting bracket is fixed to the posterior wall of the CPD dummy's chest cavity.

[0012] Furthermore, the device for the breathing movement of the CPD dummy also includes a linear motion bearing, and the sliding shaft is slidably connected to the sliding shaft mounting base via the linear motion bearing.

[0013] Furthermore, a fixing seat is provided at one end of the sliding shaft mounting base near the posterior wall of the CPD dummy's chest cavity, and the sliding shaft mounting base is mounted on the posterior wall of the CPD dummy's chest cavity through the fixing seat.

[0014] Furthermore, one side of the breathing push plate is connected to the end face of the sliding shaft near the anterior sidewall of the CPD dummy's chest cavity, and the other side of the breathing push plate is connected to the anterior sidewall of the CPD dummy's chest cavity.

[0015] Furthermore, the upper end of the sliding shaft is a U-shaped groove, which is arranged along the direction of the central axis of the sliding shaft, and the driving rack is fixed in the U-shaped groove of the sliding shaft.

[0016] Furthermore, the lower end of the sliding shaft is a cylindrical shaft, which is slidably connected to the sliding shaft mounting base via a linear motion bearing.

[0017] The beneficial effects of this utility model are:

[0018] First, the technical solution of this utility model fixes the breathing push plate on the sliding shaft, axially sets a drive rack on the sliding shaft, and sets a drive gear on the motor drive shaft. Through the meshing transmission of the drive gear and the drive rack, the rotational motion of the motor is converted into the linear motion of the sliding shaft, so that the breathing push plate can push and pull the side wall of the CPD dummy's chest cavity under the action of the sliding shaft, thereby simulating breathing motion. Moreover, the structure is simple, easy to install, and low in cost. Compared with the existing technology that uses pull wires, torsion springs, etc. to realize breathing motion, the technical solution of this utility model directly uses a motor to realize the drive, which is less difficult to operate and less likely to interfere with the detection equipment, thus improving the accuracy of the final results of the detection experiment.

[0019] Secondly, the technical solution of this utility model can control the breathing frequency of the CPD dummy's breathing movement by controlling the speed of the motor and the forward and reverse rotation time period, and control the amplitude of the CPD dummy's breathing movement by controlling the stroke of the motor. Compared with the solutions in the prior art, the technical solution of this utility model has higher flexibility and can be applied to application scenarios with high requirements for breathing frequency and amplitude. Attached Figure Description

[0020] The advantages of the above and / or additional aspects of this utility model will become apparent and readily understood in the description of the embodiments taken in conjunction with the following drawings, wherein:

[0021] Figure 1 This is a schematic diagram of the overall structure of a device for the breathing movement of a CPD dummy according to an embodiment of the present invention;

[0022] Figure 2 This is a front view of the structure of a device for the breathing movement of a CPD dummy according to an embodiment of the present invention;

[0023] Figure 3 This is a structural side view of a device for the breathing movement of a CPD dummy according to an embodiment of the present invention;

[0024] Figure 4 This is a top view of a device for the breathing movement of a CPD dummy according to an embodiment of the present invention.

[0025] Among them, 1-drive motor, 2-motor mounting base, 3-motor drive shaft, 4-drive gear, 5-drive rack, 6-linear bearing mounting base, 61-fixed base, 7-linear motion bearing, 8-sliding shaft, 9-breathing push plate. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0027] In the following description, many specific details are set forth in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0028] like Figure 1As shown, this embodiment provides a device for the breathing movement of a CPD dummy. The device is installed in the chest cavity inside the CPD dummy and includes: a drive motor 1, a drive gear 4, a drive rack 5, a sliding shaft 8, a sliding shaft mounting base 6, and a breathing push plate 9.

[0029] The drive motor 1 includes a motor drive shaft 3, and the drive motor 1 is fixedly connected to the drive gear 4 through its motor drive shaft 3. After the external power is turned on, the drive motor 1 can drive the motor drive shaft 3 to rotate in a clockwise or counterclockwise direction, so as to drive the drive gear 4 to rotate.

[0030] The motor drive shaft 3 is fixedly connected to the drive motor 1 through a keyway on the drive motor 1 (a keyway is a groove-shaped structure machined on a mechanical part to install a key, used for the connection between the shaft and rotating parts, such as gears, pulleys, motor rotors, etc., to achieve torque transmission and prevent relative rotation); for example, there is a keyway on the drive motor 1 at the position where it connects to the shaft, and there is also a corresponding keyway on the motor drive shaft 3. A key is inserted between the two, and the key is embedded in the keyways on both sides to form a rigid connection between the two, so that they can rotate together without slipping.

[0031] The device for the breathing movement of the CPD dummy also includes a motor mounting base 2, which has a through hole for the motor drive shaft 3 to pass through.

[0032] The drive motor 1 is mounted on the motor mounting base 2 by bolts or screws, and its motor drive shaft 3 passes through the through hole and is fixedly connected to the drive gear 4. The motor mounting base 2 is fixed to the posterior wall of the chest cavity of the CPD dummy by bolts or screws.

[0033] In this embodiment, the side wall of the CPD dummy's chest cavity near the dummy's back is designated as the posterior side wall, and the side wall of the CPD dummy's chest cavity near the dummy's anterior chest is designated as the anterior side wall.

[0034] The upper end of the sliding shaft 8 is a U-shaped groove, which is set along the direction of the central axis of the sliding shaft 8 (the central axis of the sliding shaft 8 is perpendicular to the cross-section of the sliding shaft 8) and opens upward. The drive rack 5 is fixed in the U-shaped groove of the sliding shaft 8, and the length of the drive rack 5 is greater than or equal to the length of the sliding shaft 8.

[0035] The device for the breathing movement of the CPD dummy also includes a linear motion bearing 7, which is a cylindrical structure with an arc-shaped cross-section; the sliding shaft 8 is slidably connected to the sliding shaft mounting base 6 through the linear motion bearing 7.

[0036] In this embodiment, the linear motion bearing 7 can be a linear ball bearing (which slides along the linear motion guide shaft by rolling steel balls), a self-lubricating linear bearing (which relies on the self-lubrication of the material and does not use rolling balls), etc.

[0037] The lower end of the sliding shaft 8 is a cylindrical shaft, the size of which matches the inner ring diameter of the linear motion bearing 7. The cylindrical shaft is slidably connected to the sliding shaft mounting seat 6 through the linear motion bearing 7, and can slide along the sliding shaft mounting seat 6 under the action of the linear motion bearing 7.

[0038] The sliding shaft mounting base 6 is a cylindrical structure. The lower end of the cylindrical structure is an arc-shaped groove, the size of which matches the outer ring diameter of the linear motion bearing 7. The upper end of the cylindrical structure is a groove with two parallel sides. The width of the groove with two parallel sides matches the width of the outer wall of the U-shaped groove at the upper end of the sliding shaft 8. The U-shaped groove at the upper end of the sliding shaft 8 is embedded in the groove with two parallel sides.

[0039] A fixing seat 61 is provided at one end of the sliding shaft mounting seat 6 near the posterior wall of the CPD dummy's chest cavity. The sliding shaft mounting seat 6 is mounted on the posterior wall of the CPD dummy's chest cavity through the fixing seat 61. One end of the drive rack 5 near the posterior wall of the dummy's chest cavity extends beyond the U-shaped groove of the sliding shaft 8 and extends backward to a position flush with the edge of the fixing seat 61.

[0040] The drive gear 4 meshes with the drive rack 5. When the drive gear 4 rotates, the drive rack 5 drives the sliding shaft 8 to move linearly along the sliding shaft mounting seat 6.

[0041] One side of the breathing push plate 9 is connected to the end face of the sliding shaft 8 near the front wall of the CPD dummy's chest cavity by bolts or screws, and the other side of the breathing push plate 9 is connected to the front wall of the CPD dummy's chest cavity (which can be glued or Velcro). When the sliding shaft 8 moves linearly along the sliding shaft mounting seat 6, the breathing push plate 9 drives the front wall of the CPD dummy's chest cavity to move, so that the CPD dummy's chest cavity inhales or exhales air to simulate the dummy's breathing movements.

[0042] The drive motor 1 is used to drive the drive gear 4 to rotate clockwise or counterclockwise, and through the meshing transmission between the drive gear 4 and the drive rack 5, it drives the sliding shaft 8 to slide along the sliding shaft mounting seat 6, thereby causing the breathing push plate 9 to move back and forth, realizing the dummy's breathing movement.

[0043] In this embodiment, the arc-shaped groove at the lower end of the sliding shaft mounting base 6 can accommodate the linear motion bearing 7 and the sliding shaft 8, allowing the sliding shaft 8 to slide axially (the axial direction is the direction of the central axis of the sliding shaft 8) under the action of the linear motion bearing 7; the parallel grooves on both sides at the upper end of the sliding shaft mounting base 6 can limit the U-shaped groove at the upper end of the sliding shaft 8 to prevent loosening and avoid misalignment and disengagement between the drive gear 4 and the drive rack 5, which would affect the effect of simulating breathing movements.

[0044] In this embodiment, the working principle of the device used for the breathing movement of the CPD dummy is as follows:

[0045] The device for the breathing movement of the CPD dummy is fixed in the chest cavity of the CPD dummy. The motor mounting base 2 and the sliding shaft mounting base 6 are respectively fixed to the posterior side wall of the chest cavity of the CPD dummy by bolts. The motor drive shaft 3 of the drive motor 1 passes through the motor mounting base 2 and is fixedly connected to the drive gear 4. The sliding shaft 8 is slidably connected to the sliding shaft mounting base 6 through the linear motion bearing 7. The drive rack 5 is fixed on the sliding shaft 8, and the drive gear 4 is located above the drive rack 5 and meshes with the drive rack 5.

[0046] The rotational speed and reversal time period (i.e., the time for clockwise and counterclockwise rotation) of the drive motor 1 are set according to the required breathing frequency for the test. The stroke of the drive motor 1 (i.e., the displacement of the drive rack 5) is set according to the required breathing amplitude (i.e., the depth of breathing). The CPD dummy is placed on the seat of the test vehicle, and the drive motor 1 is started. The CPD dummy performs breathing movements under the action of the drive motor 1. During inhalation, the motor drive shaft 3 drives the drive gear 4 to rotate counterclockwise. Through the meshing transmission between the drive gear 4 and the drive rack 5, the sliding shaft 8 is driven along the sliding shaft mounting seat 6 towards the chest cavity of the CPD dummy. The front sliding plate 9, under the thrust of the sliding shaft 8, pushes the front wall of the CPD dummy's chest cavity outward, allowing external air to enter the CPD dummy's chest cavity. During exhalation, the motor drive shaft 3 drives the drive gear 4 to rotate clockwise. Through the meshing transmission between the drive gear 4 and the drive rack 5, the sliding shaft 8 is driven to slide along the sliding shaft mounting seat 6 towards the rear of the CPD dummy's chest cavity. Under the pulling force of the sliding shaft 8, the breathing plate 9 pulls the front wall of the CPD dummy's chest cavity inward, causing the air inside the CPD dummy's chest cavity to be squeezed out. The drive motor 1 rotates according to the set speed, stroke, and time cycle to simulate breathing movements.

[0047] In this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0048] The shapes of the components in the accompanying drawings are schematic and may differ from their actual shapes. The drawings are only used to illustrate the principle of this utility model and are not intended to limit this utility model.

[0049] Although the present invention has been disclosed in detail with reference to the accompanying drawings, it should be understood that these descriptions are merely exemplary and not intended to limit the application of the present invention. The scope of protection of the present invention is defined by the appended claims and may include various modifications, alterations, and equivalents made to the invention without departing from the scope and spirit of the present invention.

Claims

1. A device for respiratory movement of a CPD dummy, characterized in that, The device for the breathing movement of the CPD dummy is installed in the chest cavity of the CPD dummy. The device includes: a drive motor (1), a drive gear (4), a drive rack (5), a sliding shaft mounting base (6), a sliding shaft (8), and a breathing push plate (9). The drive motor (1) includes a motor drive shaft (3), and the drive motor (1) is fixedly connected to the drive gear (4) through its motor drive shaft (3). The drive rack (5) is fixed axially on the sliding shaft (8). The drive gear (4) meshes with the drive rack (5). The sliding shaft (8) is slidably connected to the sliding shaft mounting base (6). The breathing push plate (9) is connected to the end face of one side of the sliding shaft (8). The drive motor (1) is used to drive the drive gear (4) to rotate clockwise or counterclockwise, and through the meshing transmission between the drive gear (4) and the drive rack (5), it drives the sliding shaft (8) to slide along the sliding shaft mounting seat (6), thereby causing the breathing push plate (9) to move back and forth, realizing the dummy's breathing movement.

2. The device for respiratory movement of a CPD dummy as described in claim 1, characterized in that, The device also includes a motor mounting base (2); The motor mounting base (2) is provided with a through hole for the motor drive shaft (3) to pass through. The drive motor (1) is mounted on the motor mounting base (2). The motor drive shaft (3) passes through the through hole and is connected to the drive gear (4).

3. The device for respiratory movement of a CPD dummy as described in claim 2, characterized in that, The motor mounting base (2) is fixed to the posterior wall of the chest cavity of the CPD dummy.

4. The device for respiratory movement of a CPD dummy as described in claim 1, characterized in that, The device for the breathing movement of the CPD dummy also includes a linear motion bearing (7), and the sliding shaft (8) is slidably connected to the sliding shaft mounting base (6) through the linear motion bearing (7).

5. The device for respiratory movement of a CPD dummy as described in claim 1, characterized in that, A fixing seat (61) is provided at one end of the sliding shaft mounting seat (6) near the posterior wall of the CPD dummy's chest cavity, and the sliding shaft mounting seat (6) is mounted on the posterior wall of the CPD dummy's chest cavity through the fixing seat (61).

6. The device for respiratory movement of a CPD dummy as described in claim 1, characterized in that, One side of the breathing push plate (9) is connected to the end face of the sliding shaft (8) near the anterior wall of the CPD dummy's chest cavity, and the other side of the breathing push plate (9) is connected to the anterior wall of the CPD dummy's chest cavity.

7. The device for respiratory movement of a CPD dummy as described in claim 1, characterized in that, The upper end of the sliding shaft (8) is a U-shaped groove, which is arranged along the direction of the central axis of the sliding shaft (8), and the driving rack (5) is fixed in the U-shaped groove of the sliding shaft (8).

8. The device for respiratory movement of a CPD dummy as described in claim 4, characterized in that, The lower end of the sliding shaft (8) is a cylindrical shaft, which is slidably connected to the sliding shaft mounting base (6) through a linear motion bearing (7).

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