Child dummy target object for CPD test

Abstract

The utility model relates to a child dummy target object for CPD test, which belongs to the technical field of automobile CPD evaluation and comprises a head, a trunk, arms, legs, a respiration simulation device, a heartbeat simulation device, a power supply and a control circuit box. The head, the arms, the legs, the respiration simulation device and the heartbeat simulation device are respectively connected with the power supply and the control circuit box; the power supply and control circuit box is connected with the central control unit, the power supply and control circuit box controls the head, the arms and the legs to respectively simulate actions of the head, the arms and the legs of a real child according to action instructions transmitted by the central control unit, and the respiration simulation device and the heartbeat simulation device respectively simulate abdominal respiration and heartbeat of the real child. The device has the simulated appearance and radar reflection property of a real child, can simulate the head, arm and leg movement, heartbeat and abdominal respiration of the child, generates the micro Doppler effect the same as that of the real child, and is suitable for detecting, identifying and alarming the child left in the vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile CPD evaluation, in particular to a child dummy target object used for CPD testing. Background Art

[0002] Cases of children being left in vehicles and suffering from heatstroke or even death have been reported frequently. Studies have shown that when the temperature reaches 35°C and the sun is shining directly, the temperature inside a car can exceed 65°C within 15 minutes; when the temperature inside the vehicle reaches 42°C, children trapped in the car may become comatose; and when a child's body temperature reaches 41.7°C, they may die from heat stroke.

[0003] Based on the progress of automobile intelligence development and customers' urgent demand for driving safety, more car companies have added CPD (Child Presence Detection) child in-car monitoring functions when developing new models.

[0004] CPD features are gaining increasing attention. The IVISTA China Intelligent Vehicle Index has conducted research on evaluation methods for child in-car monitoring, assessing the feature from the perspectives of early warning and intervention. The China New Car Assessment Program (C-NCAP) has added relevant testing items to its 2025 version, awarding extra points to vehicles equipped with this feature.

[0005] During the CPD function evaluation process for vehicles, using real children for testing cannot guarantee child safety. A series of issues, such as the unfamiliar environment inside the vehicle, radar radiation, and the irritation of children with the smell of a new car, inevitably make testing difficult. In summary, there is an urgent need for a child dummy target to meet the needs of automotive manufacturers and related testing and evaluation organizations in CPD function evaluations. Utility Model Content

[0006] The utility model provides a child dummy target for CPD testing, which solves the problem that in the process of evaluating automobile CPD performance, if real children are used for testing, the safety of the children cannot be guaranteed, making the testing difficult.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A child dummy target for CPD testing, comprising a head, torso, arms, legs, a breathing simulator, a heartbeat simulator, and a power supply and control circuit box; the head, arms, legs, breathing simulator, and heartbeat simulator are respectively connected to the power supply and control circuit box via cables;

[0009] According to the real appearance of a child, the head is installed at the top center of the torso, the two arms are symmetrically installed at the upper left and right ends of the torso, and the two legs are symmetrically installed at the lower left and right ends of the torso; the heartbeat simulation device and the breathing simulation transpose are respectively installed at the upper and lower front end surfaces inside the torso, and the power supply and control circuit box is placed on the back of the torso; the power supply and control circuit box is connected to the central control unit, and the power supply and control circuit box controls the head, arms, and legs to respectively simulate the movements of the head, arms, and legs of a real child according to the action instructions transmitted by the central control unit, and the breathing simulation transpose and the heartbeat simulation device respectively simulate the abdominal breathing and heartbeat of a real child.

[0010] Furthermore, the breathing simulation transpose includes a linear motion servo, a push rod and a curved plastic plate. The linear motion servo is connected to the power supply and control circuit box through a cable. The linear motion servo pushes the curved plastic plate up and down through the push rod to simulate the abdominal ups and downs of children's abdominal breathing.

[0011] Furthermore, the heartbeat simulation device includes a rotating motor, a main shaft and an eccentric disk. The rotating motor is connected to the power supply and control circuit box through a cable. The rotating motor drives the eccentric disk to rotate through the main shaft. The rotation of the eccentric disk generates micro-displacement to simulate the vibration performance of a child's heartbeat.

[0012] Furthermore, the head includes a head movement mechanism, a foam lining, and an outer skin; the head movement mechanism is located in the center of the head, and the foam lining and the outer skin are wrapped around the outside of the head movement mechanism to simulate the real shape of a child's head; the head movement mechanism is connected to the power supply and control circuit box, and simulates the child's head movements under the control of the power supply and control circuit box;

[0013] The torso comprises a central panel, the foam lining, and the outer skin, wherein the foam lining and the outer skin are sequentially wrapped around the outer side of the central panel to simulate the real shape of a child's torso;

[0014] The arm includes a hand motion mechanism, the foam lining, and the outer skin, wherein the foam lining and the outer skin are sequentially wrapped around the outside of the hand motion mechanism to simulate the real shape of a child's arm; the hand motion mechanism is connected to the power supply and control circuit box, and simulates the movement of a child's arm under the control of the power supply and control circuit box;

[0015] The leg includes a leg movement mechanism, the foam lining, and the outer skin; the foam lining and the outer skin are wrapped around the outside of the leg movement mechanism in sequence to simulate the real shape of a child's leg; the leg movement mechanism is connected to the power supply and control circuit box to simulate the child's leg movements under the control of the power supply and control circuit box.

[0016] Furthermore, the inner skeletons of the head, arms and legs are all made of polyethylene pipes.

[0017] Furthermore, the outer skin is composed of multiple layers of cloth.

[0018] Furthermore, the outermost layer of the cloth has a non-metallic coating with the same millimeter-wave radar and lidar reflection properties as a real child.

[0019] Furthermore, the head movement mechanism includes a head servo, a head support rod and a cable; the bottom end of the head support rod is connected to the steering wheel of the head servo, and the head servo is installed on the torso through a bracket; the head servo is connected to the power supply and control circuit box through the cable.

[0020] Furthermore, the hand movement mechanism includes a hand connecting frame, a shoulder servo, an elbow servo, an arm support rod, a bracket, and a cable; the shoulder servo and the elbow servo are respectively connected to the power supply and control circuit box through the cables; the steering wheel of the shoulder servo is connected to the outer end of the hand connecting frame, and the hand connecting frame is fixed to the center plate; the shoulder servo is hingedly connected to the elbow servo through the bracket, and the steering wheel of the elbow servo is connected to the arm support rod.

[0021] Furthermore, the leg movement mechanism includes a hip connecting frame, a hip servo, a knee servo, a calf support rod, a bracket, and a cable; the outer end of the hip connecting frame is connected to the steering wheel of the hip servo, and the hip connecting frame is installed on the center plate; the hip servo is connected to the knee servo through the bracket, the steering wheel of the knee servo is connected to the calf support rod, and the hip servo and the knee servo are respectively connected to the power supply and control circuit box through the cables.

[0022] Beneficial effects of the utility model:

[0023] The child dummy target for CPD testing disclosed in the present invention has the same visual characteristics as a real child under the vehicle-mounted visual sensor, and can simulate the head, hand, and leg movements, heartbeat movements, and abdominal breathing movements of a real child under the vehicle-mounted millimeter-wave radar. It has the same radar reflection characteristics as a real child, and the reflection characteristics include RCS and micro-Doppler effect. It is light in weight, easy to carry, and simple to operate.

[0024] The child dummy target of the present invention is designed and developed according to the data of the average height ratio, appearance, color, etc. of children, so as to achieve the same visual characteristics as real children. The child dummy target is mainly composed of a combination of non-metallic materials such as cloth, foam lining, polyethylene pipe, etc., taking into account both structural strength and durability, and ensuring that the 180° range of the front of the child dummy target has the same millimeter-wave radar RCS (Radar Cross Section) and laser radar reflection properties as real children. The movement of the child dummy target's head, arms, and legs, and the simulation of heartbeat and abdominal breathing can jointly simulate the movement characteristics of the human body and produce the same micro-Doppler effect as real children. Therefore, the child dummy target of the present invention is suitable for the detection, identification, and alarm functions of children left behind in the car by corresponding detection equipment such as visual systems and millimeter-wave radars, and can meet the needs of automobile companies and related testing and evaluation institutions in the evaluation of vehicle CPD functions. It can be used continuously and repeatedly, which can solve the problem that the use of real children in testing cannot guarantee the safety of children and also reduce the testing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a main structural diagram of the child dummy target used for CPD testing in the present invention;

[0026] Figure 2 This is a schematic diagram of the left side structure of the child dummy target used for CPD testing in the present invention;

[0027] Figure 3 This is a schematic diagram of the bracket in the utility model;

[0028] Figure 4 This is a schematic diagram of the internal center plate structure of the present utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the head movement mechanism in the utility model;

[0030] Figure 6 This is a schematic diagram of the hand movement mechanism structure of the present utility model;

[0031] Figure 7 This is a schematic diagram of the leg motion mechanism structure of the utility model.

[0032] Among them: 1-head, 1.1-head servo, 1.2-head support rod, 2-torso, 2.1-center plate, 2.1.1-arm mounting part, 2.1.2-leg mounting part, 2.1.3-mounting through hole, 3-arm, 3.1-hand connecting frame, 3.2-shoulder servo, 3.3-elbow servo, 3.4-forearm support rod, 4-leg, 4.1-hip connecting frame, 4.2-hip servo, 4.3-knee servo, 4.4-calf support rod, 5-breathing simulation device, 6-heartbeat simulation device, 7-power supply and control circuit box, 8-bracket. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present application, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] The terms "up", "down", "left", "right", "front", and "back" in this application are based on the positional relationships shown in the accompanying drawings. The corresponding positional relationships may vary depending on the drawings, and should not be construed as limiting the scope of protection.

[0035] In this utility model, the terms "installed," "connected," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, integral connection, mechanical connection, electrical connection, or mutual communication. They can also refer to direct connection or indirect connection through an intermediate medium. They can also refer to internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] This embodiment describes a child dummy target for CPD testing, which is used for CPD (Child Protection Detection) testing of automobiles.

[0037] like Figure 1 and Figure 2As shown, the child dummy target object includes a head 1, a torso 2, arms 3, legs 4, a breathing simulation device 5, a heartbeat simulation device 6, and a power supply and control circuit box 7. Referring to the average body size of Chinese children, the child's appearance is simulated, with the head 1 installed at the top center of the torso 2, the two arms 3 symmetrically installed at the upper left and right ends of the torso 2, and the two legs 4 symmetrically installed at the lower left and right ends of the torso 2. The heartbeat simulation device 6 and the breathing simulation transpose 5 are respectively installed at the upper and lower ends of the front end surface of the torso 2. The power supply and control circuit box 7 is placed on the back of the torso 2 and is connected to the head 1, arms 3, legs 4, breathing simulation device 5, and heartbeat simulation device 6 respectively through cables. The power supply and control circuit box 7 supplies power to them and controls the child dummy to simulate real-life movements, breathing, and heartbeat.

[0038] The head 1 of this embodiment is modeled after a child's appearance and is used for recognition by the visual sensor used for testing. Figure 3 As shown, the head 1 includes a head movement mechanism, a foam lining and an outer skin. The head movement mechanism is located in the center of the head 1, and the foam lining and outer skin are wrapped around the outside of the head movement mechanism in sequence to simulate the real shape of a child's head.

[0039] The head movement mechanism of this embodiment includes a head servo 1.1, a head support rod 1.2 and a cable. The head support rod 1.2 supports the head 1, and its bottom end is connected to the steering wheel of the head servo 1.1. The head servo 1.1 is installed on the torso 2 through a bracket 8. The head servo 1.1 is connected to the power supply and control circuit box 7 through a cable. Under the control of the power supply and control circuit box 7, the head servo 1.1 drives the head 1 through the head support rod 1.2 to simulate the movements of a real child's head such as shaking the head, raising the head, and lowering the head. Figure 4 As shown, the middle of the bracket 8 is a hollow cylinder, and U-shaped structures are symmetrically installed at the upper and lower ends of the hollow cylinder. Through holes are symmetrically provided on both sides of the U-shaped structure to cooperate with bolts to achieve hinged connection.

[0040] The trunk 2 comprises a central panel 2.1 (see Figure 5 ), foam lining, outer skin, the foam lining and outer skin are wrapped around the outside of the center plate 2.1 in sequence to simulate the real shape of a child's torso. The center plate 2.1 is located in the center of the torso 2 and plays a supporting role. This embodiment has an arm mounting portion 2.1.1 and a leg mounting portion 2.1.2 at the upper and lower parts of the left and right ends of the center plate 2.1, respectively. A plurality of mounting through holes 2.1.3 are respectively provided on the arm mounting portion 2.1.1, the leg mounting portion 2.1.2 and the upper and lower middle parts of the torso 2, which are used to mount the arms 3, legs 4, the breathing simulation device 5, and the heartbeat simulation device 6 with bolts.

[0041] The arm 3 includes a hand movement mechanism, a foam lining, and an outer skin. The foam lining and the outer skin are wrapped around the outside of the hand movement mechanism in sequence to simulate the real shape of a child's arm.

[0042] like Figure 6 As shown, the hand motion mechanism includes a hand connecting frame 3.1, a shoulder servo 3.2, an elbow servo 3.3, a small arm support rod 3.4, a bracket 8, and cables. The shoulder servo 3.2 and elbow servo 3.3 are respectively connected to the power supply and control circuit box 7 via cables. The steering wheel of the shoulder servo 3.2 is connected to the outer end of the hand connecting frame 3.1, and the inner end of the hand connecting frame 3.1 is fixed to the arm mounting portion 2.1.1 of the center plate 2.1 by bolts. Under the control of the power supply and control circuit box 7, the shoulder servo 3.2 moves relative to the hand connecting frame 3.1 to simulate the rotation and swinging of a child's shoulder. The shoulder servo 3.2 is hingedly connected to the elbow servo 3.3 via the bracket 8, and the steering wheel of the elbow servo 3.3 is connected to the small arm support rod 3.4. The power supply and control circuit box 7 controls the elbow servo 3.3 to drive the small arm support rod 3.4 to move, simulating the movement of a child's small arm.

[0043] The legs 4 include a leg movement mechanism (see Figure 7 ), foam lining, outer skin, the foam lining and outer skin are wrapped around the outside of the leg movement mechanism in sequence to simulate the real shape of children's legs.

[0044] The leg movement mechanism includes a hip connector 4.1, a hip servo 4.2, a knee servo 4.3, a calf support rod 4.4, a bracket 8, and cables. The outer end of the hip connector 4.1 is connected to the steering wheel of the hip servo 4.2, and the inner end of the hip connector 4.1 is bolted to the leg mounting portion 2.1.2 of the torso 2. The hip servo 4.2 is connected to the knee servo 4.3 via the bracket 8, and the steering wheel of the knee servo 4.3 is connected to the calf support rod 4.4. The hip servo 4.2 and the knee servo 4.3 are respectively connected to the power supply and control circuit box 7 via cables. Under the control of the power supply and control circuit box 7, the hip servo 4.2 moves relative to the hip connector 4.1, and the knee servo 4.3 drives the calf support rod 4.4 to move, that is, the two simulate the leg movements of a child.

[0045] The breathing simulation device 5 is installed on the lower part of the center plate 2.1 by bolts, and includes a linear motion servo, a push rod and a curved plastic plate. The linear motion servo is connected to the power supply and control circuit box 7 through a cable. The linear motion servo pushes the curved plastic plate up and down through the push rod. The curved plastic plate drives the skin and clothes to rise and fall, simulating the abdominal rise and fall of children during abdominal breathing.

[0046] The heartbeat simulation device 6 is installed on the upper part of the central plate 2.1 by bolts, and includes a rotating motor, a main shaft and an eccentric disk. The rotating motor is connected to the power supply and control circuit box 7 through cables. The rotating motor drives the eccentric disk to rotate through the main shaft. The eccentric disk produces micro-displacement when rotating, simulating the vibration performance of a child's heartbeat.

[0047] The power supply and control circuit box 7 of this embodiment includes a power module and an integrated circuit board. The power module supplies power to the entire device and can utilize an 18650 lithium battery pack. The integrated circuit board is connected to the servos and motors within the head 1, arms 3, legs 4, breathing simulator 5, and heartbeat simulator 6 via cables. The integrated circuit board is also connected to a central control unit (e.g., a test center, remote control module, etc.) for data transmission. The central control unit transmits the child dummy's motion instructions to the integrated circuit board. The circuitry within the integrated circuit board controls the servos within the head 1, arms 3, and legs 4 to operate according to the parameters specified in the motion instructions, such as the operating time, angle, and operating frequency. The circuitry within the integrated circuit board also controls the breathing simulator 5 and heartbeat simulator 6 to operate at a specified frequency. As a result, the servos and motors operate to simulate the child dummy's joint rotation, limb swinging, breathing, heartbeat, and other movements, all of which mimic those of a real child. In this embodiment, in order to realize the rapid disassembly, assembly and maintenance of the head 1, arms 3, legs 4, servos in the breathing simulation device 5 and motors in the heartbeat simulation device 6, cable connectors are provided on the servos and motors, one end of the cable is connected to the cable connector, and the other end is connected to the corresponding module in the power supply and control circuit box 7.

[0048] In this embodiment, the internal skeleton, including the head support rods 1.2 of the head 1, the forearm support rods 3.4 of the arms 3, the calf support rods 4.4 of the legs 4, and the brackets 8, are all made of polyethylene tubing. The outer skin of the child dummy target is composed of multiple layers of fabric, which can be made of high-elastic nylon. The outermost layer of the skin is coated with a non-metallic coating, ensuring that the child dummy target has the same millimeter-wave radar RCS (Radar Cross Section) and LiDAR reflection properties as a real child within a 180-degree frontal range. The foam lining is made of high-density foam, which is easy to carve and shape. After installation, it can work together with the outer skin to protect the internal components of the child dummy.

[0049] The child dummy target object in this embodiment is modeled using physical parameters such as body proportions, size, and color that are similar to those of the average Chinese child in the test age group. The head 1 is modeled based on a real appearance, such as having facial features such as ears, nose, eyes, mouth, and hair. The facial fabric is made of human skin color, and the child dummy is dressed in clothing. It has visual characteristics similar to those of a real child and possesses normal facial features that can be recognized by visual sensors, facilitating recognition by visual sensors installed in the test area.

[0050] The child dummy target of the present embodiment is used for automobile CPD assessment, and a camera and millimeter wave radar are installed in the car. During the test, first, the tested vehicle starts the leftover detection function (including the child protection detection function), and the child dummy target is placed in the back seat detection area. If the child dummy target is installed on a child safety seat for a car, a sitting position or a sleeping position can be adopted. Then the car engine is turned off, and the car door is closed and locked. The child dummy target action function is turned on, and the central control unit drives each joint steering gear through the power supply and control circuit box 7. The head 1, arms 3, and legs 4 simulate the real action of the child, and the breathing simulation device 5 is started. The appearance of the abdominal undulation is simulated by the child's 18 / 20 / 22 / 30 breathing rates per minute. The heartbeat simulation device 6 starts and stops at 80 / 120 / 150 times per minute (taking the heartbeat rate of a child aged 3-6 as an example), simulates the child's heartbeat, and carries out human physiological characteristics simulation, producing the micro-Doppler effect identical with the real child's movement.

[0051] The camera installed inside the vehicle detects a child dummy left in the car, and the millimeter-wave radar detects the breathing rate and heartbeat of the child dummy, and transmits the detection information to the central control unit. The central control unit sends an alarm signal (the alarm signal can be sent to the device preset by the owner or an alarm sound is issued). This proves that the left-object detection function in this vehicle is effective. If there is no alarm signal, the left-object detection function is invalid.

[0052] Although the principles of the present invention have been described in detail above in conjunction with the preferred embodiments of the present invention, those skilled in the art should understand that the above embodiments are merely illustrative of the implementation of the present invention and are not intended to limit the scope of the present invention. The details in the embodiments do not constitute a limitation on the scope of the present invention. Without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformations and simple substitutions based on the technical solutions of the present invention fall within the scope of protection of the present invention.

Claims

1. A child dummy target for CPD testing, characterized in that: The child dummy target object comprises a head (1), a torso (2), arms (3), legs (4), a breathing simulation device (5), a heartbeat simulation device (6), and a power supply and control circuit box (7); the head (1), the arms (3), the legs (4), the breathing simulation device (5), and the heartbeat simulation device (6) are respectively connected to the power supply and control circuit box (7) via cables; According to the real appearance of a child, the head (1) is installed at the top center of the trunk (2), the two arms (3) are symmetrically installed at the upper left and right ends of the trunk (2), and the two legs (4) are symmetrically installed at the lower left and right ends of the trunk (2); the heartbeat simulation device (6) and the breathing simulation transpose (5) are respectively installed at the upper and lower ends of the front end surface inside the trunk (2), and the power supply and control circuit box (7) is placed on the back of the trunk (2); the power supply and control circuit box (7) is connected to the central control unit, and the power supply and control circuit box (7) controls the head (1), the arms (3), and the legs (4) to respectively simulate the movements of the head, arms, and legs of a real child according to the action instructions transmitted by the central control unit, and the breathing simulation transpose (5) and the heartbeat simulation device (6) respectively simulate the abdominal breathing and heartbeat of a real child.

2. The child dummy target for CPD testing according to claim 1, characterized in that: The breathing simulation transpose (5) includes a linear motion servo, a push rod and a curved plastic plate. The linear motion servo is connected to the power supply and control circuit box (7) via a cable. The linear motion servo pushes the curved plastic plate up and down via the push rod to simulate the abdominal undulation of children during abdominal breathing.

3. The child dummy target for CPD testing according to claim 1, characterized in that: The heartbeat simulation device (6) comprises a rotating motor, a main shaft and an eccentric disk. The rotating motor is connected to the power supply and control circuit box (7) via a cable. The rotating motor drives the eccentric disk to rotate via the main shaft. The rotation of the eccentric disk generates micro-displacement to simulate the vibration performance of a child's heartbeat.

4. The child dummy target for CPD testing according to claim 1, characterized in that: The head (1) comprises a head movement mechanism, a foam lining and an outer skin; the head movement mechanism is located at the center of the head (1), and the foam lining and the outer skin are wrapped around the outside of the head movement mechanism in order to simulate the real shape of a child's head; the head movement mechanism is connected to the power supply and control circuit box (7), and simulates the child's head movement under the control of the power supply and control circuit box (7); The torso (2) comprises a central panel (2.1), the foam lining, and the outer skin, wherein the foam lining and the outer skin are sequentially wrapped around the outer side of the central panel (2.1) to simulate the real shape of a child's torso; The arm (3) comprises a hand motion mechanism, the foam lining, and the outer skin, wherein the foam lining and the outer skin are sequentially wrapped around the outside of the hand motion mechanism to simulate the real shape of a child's arm; the hand motion mechanism is connected to the power supply and control circuit box (7) to simulate the movement of a child's arm under the control of the power supply and control circuit box (7); The leg (4) comprises a leg motion mechanism, the foam lining, and the outer skin; the foam lining and the outer skin are sequentially wrapped around the outer side of the leg motion mechanism to simulate the real shape of a child's leg; the leg motion mechanism is connected to the power supply and control circuit box (7) to simulate the movement of a child's leg under the control of the power supply and control circuit box (7).

5. The child dummy target for CPD testing according to claim 4, characterized in that: The inner skeletons of the head (1), the arms (3) and the legs (4) are all made of polyethylene pipes.

6. The child dummy target for CPD testing according to claim 4, characterized in that: The outer skin is composed of multiple layers of cloth.

7. The child dummy target for CPD testing according to claim 6, characterized in that: The outermost layer of the fabric has a non-metallic coating with the same millimeter-wave radar and lidar reflective properties as a real child.

8. The child dummy target for CPD testing according to claim 4, characterized in that: The head movement mechanism comprises a head servo (1.1), a head support rod (1.2) and a cable; the bottom end of the head support rod (1.2) is connected to the steering wheel of the head servo (1.1); the head servo (1.1) is mounted on the trunk (2) via a bracket (8); and the head servo (1.1) is connected to the power supply and control circuit box (7) via the cable.

9. The child dummy target for CPD testing according to claim 4, characterized in that: The hand movement mechanism comprises a hand connecting frame (3.1), a shoulder servo (3.2), an elbow servo (3.3), a small arm support rod (3.4), a bracket (8), and a cable; the shoulder servo (3.2) and the elbow servo (3.3) are respectively connected to the power supply and control circuit box (7) via the cable; the steering wheel of the shoulder servo (3.2) is connected to the outer end of the hand connecting frame (3.1), and the hand connecting frame (3.1) is fixed on the center plate (2.1); the shoulder servo (3.2) is hingedly connected to the elbow servo (3.3) via the bracket (8), and the steering wheel of the elbow servo (3.3) is connected to the small arm support rod (3.4).

10. The child dummy target for CPD testing according to claim 4, characterized in that: The leg movement mechanism comprises a hip connecting frame (4.1), a hip servo (4.2), a knee servo (4.3), a calf support rod (4.4), a bracket (8), and a cable; the outer end of the hip connecting frame (4.1) is connected to the steering wheel of the hip servo (4.2), and the hip connecting frame (4.1) is installed on the center plate (2.1); the hip servo (4.2) is connected to the knee servo (4.3) through the bracket (8), the steering wheel of the knee servo (4.3) is connected to the calf support rod (4.4), and the hip servo (4.2) and the knee servo (4.3) are respectively connected to the power supply and control circuit box (7) through the cables.

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