Falling-resistant waistcoat protection performance test structure

Abstract

The utility model discloses an anti-falling waistcoat protection performance test structure, which relates to the technical field of anti-falling waistcoat performance test and comprises a base, a height-adjustable support frame, a carrying table, a force application mechanism, a dummy model, an acceleration sensor and a data processing module. The platform deck comprises replaceable material layers with different hardness to simulate various ground conditions, the force application mechanism controls the dynamic falling posture of the dummy model through an electric push rod and a mechanical arm driven by a servo motor, and the dummy model is provided with an installation base to fix an acceleration sensor and is matched with a wearing test of an anti-falling waistcoat. The dummy model is stably fixed and quickly released through the locking mechanism, and the impact force change of key parts of the body before and after the waistcoat is worn can be accurately compared in combination with multi-dimensional acceleration data acquisition and processing. The device can reproduce a complex falling scene, improves the authenticity of a test scene and the data reliability, and provides a standardized test means for the evaluation of the protection performance of an anti-falling waistcoat.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of anti-falling waistcoat performance test, especially relates to a kind of anti-falling waistcoat protective performance test structure. BACKGROUND

[0002] As wearable equipment for the anti-falling protection of the elderly, the core function of the anti-falling waistcoat needs to be realized by reducing the impact force on the key parts of the body when falling down. However, there is a lack of standardized and scenario-based testing means for the protective performance of waistcoats in the prior art. Due to the complex variables in the actual falling process, such as human posture, ground material and impact direction, traditional static pressure testing or single-scenario simulation cannot quantify the buffering effect of waistcoats in real use environment, resulting in a lack of objective data support for the evaluation of product protective performance. In particular, the comparative analysis of the impact force changes of different parts of the body before and after wearing the waistcoat is limited by the insufficient dynamic simulation capability of the testing equipment and the accuracy limitations of the sensors, and cannot accurately reflect the actual protective capability of the waistcoat. Therefore, there is an urgent need for a test device that can reproduce multi-dimensional falling scenarios, adapt to different ground conditions, and accurately capture dynamic impact data, to provide a scientific evaluation basis for the protective performance of anti-falling waistcoats. SUMMARY

[0003] To solve the above technical problems, the utility model provides an anti-falling waistcoat protective performance test structure.

[0004] The utility model provides an anti-falling waistcoat protective performance test structure, which comprises:

[0005] A base is provided with an adjustable height support frame on the base;

[0006] A loading platform is detachably installed on the surface of the base, and the loading platform comprises at least two material layers with different hardness;

[0007] A force applying mechanism comprises an electric push rod and a servo motor driven mechanical arm, and is fixed to the top end of the support frame;

[0008] A dummy model is fixed to the surface of the loading platform by a locking mechanism, and the hip and head of the dummy model are provided with mounting seats, and the dummy model is used for wearing an anti-falling waistcoat;

[0009] An acceleration sensor is detachably installed inside the mounting seat;

[0010] A data processing module is electrically connected to the acceleration sensor through a cable, and comprises a display unit and a data storage unit.

[0011] Optionally, the support frame comprises a sleeve-connected stand and a lifting sleeve, and the surface of the stand is provided with a scale mark.

[0012] Optionally, the locking mechanism comprises an electromagnetic adsorption device and a limiting buckle, and the electromagnetic adsorption device is embedded in the surface of the platform.

[0013] Optionally, the force applying mechanism further comprises an angle adjuster arranged at a joint of the mechanical arm.

[0014] Optionally, the material layer comprises a rubber base layer and a replaceable hard panel, and the hard panel is fixed above the rubber base layer through a clamping groove.

[0015] Optionally, the mounting seat comprises a pressure sensing substrate and a shockproof protective cover, and the shockproof protective cover is fixed on the surface of the dummy model through a threaded connection mode.

[0016] Optionally, the acceleration sensor is a three-axis acceleration sensor comprising X / Y / Z axis detection units and a signal amplifier.

[0017] Optionally, the data processing module further comprises a wireless transmission unit, and the wireless transmission unit is connected with an external terminal device through a Bluetooth protocol.

[0018] The embodiment of the utility model has the following technical effects:

[0019] The anti-falling waistcoat protection performance test structure can simulate different ground conditions (such as hard cement ground and elastic wood board ground) and diversified falling postures (forward, sideways and backward) through the replaceable material layer platform and the adjustable force applying mechanism, and the authenticity and coverage rate of the test scene are significantly improved. Through the cooperative action of the mechanical arm driven by the servo motor and the electric push rod, the dynamic acceleration change when the old people fall down is accurately reproduced, the shockproof cover and the three-axis acceleration sensor arranged at the key positions of the dummy model are combined, and the stable and reliable impact force data acquisition before and after wearing the anti-falling waistcoat is ensured. The electromagnetic adsorption and limiting buckle design of the locking mechanism not only guarantees the initial fixed state of the dummy model, but also realizes the natural falling simulation in the dynamic release process, and effectively avoids the test interference. The data processing module can intuitively compare the acceleration difference before and after the waistcoat protection through wireless transmission and multi-dimensional data analysis, qualitatively evaluates the buffering effect of the waistcoat on the fragile parts such as the hip and the head, and provides a high restoration degree and high compatibility standardized test platform for the protection performance optimization of the anti-falling waistcoat through the modular structure design of the device, and helps to improve the safety performance of the anti-falling equipment for the old people. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 A protective performance test structure diagram of the anti-falling waistcoat is provided.

[0022] Figure 2 A support frame structure diagram is provided.

[0023] Figure 3 A locking mechanism structure diagram is provided.

[0024] Figure 4 An installation seat structure diagram is provided.

[0025] Reference signs:

[0026] 1, base; 2, support frame; 21, stand; 22, lifting sleeve; 23, scale mark; 3, loading table; 31, material layer; 311, rubber base layer; 312, hard panel; 4, force applying mechanism; 41, electric push rod; 42, mechanical arm; 43, angle adjuster; 5, dummy model; 51, locking mechanism; 511, electromagnetic adsorption device; 512, limiting buckle; 52, installation seat; 521, pressure sensing substrate; 522, shockproof cover; 6, acceleration sensor. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely below. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0028] Figure 1 A protective performance test structure diagram of the anti-falling waistcoat is provided, and the test structure comprises:

[0029] The base 1 is provided with an adjustable height support frame 2.

[0030] The loading table 3 is detachably installed on the surface of the base 1, and the loading table 3 comprises at least two material layers 31 with different hardness.

[0031] Force mechanism 4, containing electric push rod 41 and servo motor driven mechanical arm 42, fixed to the top end of support frame 2;

[0032] Dummy model 5, fixed to the surface of the platform 3 by locking mechanism 51, the hip and head of dummy model 5 are provided with mounting seat 52, and dummy model 5 is used for wearing anti-falling waistcoat;

[0033] Acceleration sensor 6, detachably mounted in mounting seat 52;

[0034] Data processing module (not shown), electrically connected with acceleration sensor 6 through cable, containing display unit (not shown) and data storage unit (not shown).

[0035] The anti-falling waistcoat protection performance test structure comprises a base 1, the base 1 is welded by a rectangular steel plate, and screw holes are reserved on the surface for mounting a support frame 2 and a platform 3. The support frame 2 can adjust the overall height to adapt to the test requirements of dummy models 5 of different sizes. The platform 3 is fixed to the front end of the base 1 by bolts. The force mechanism 4 comprises an electric push rod 41 vertically mounted on the top end of the support frame 2, the electric push rod 41 is connected with a servo motor driven mechanical arm 42 at the end, the mechanical arm 42 is connected with the back of the dummy model 5 through a multi-axis hinge. The dummy model 5 is made of a high polymer composite material, the hip and head are provided with mounting seats 52, the acceleration sensor 6 is inserted into the mounting seat 52 and contacts with the pressure sensing substrate, and the cable is connected to the data processing module. When testing, the dummy model 5 wearing the anti-falling waistcoat is fixed to the platform 3 by the locking mechanism 51, the force mechanism 4 drives the dummy model 5 to complete the preset falling action, the acceleration sensor 6 collects the acceleration data of each part in real time, and the impact force change curve is displayed after being analyzed by the data processing module. The protection performance can be evaluated by comparing the data when the waistcoat is not worn.

[0036] Figure 2 The support frame structure schematic diagram provided by the utility model shows that in some embodiments: the support frame 2 comprises a sleeve jointed stand column 21 and a lifting sleeve 22, and the surface of the stand column 21 is provided with scale marks 23.

[0037] The column 21 of the support frame 2 is a square hollow steel tube, the surface of which is sprayed with an anti-rust coating and printed with a scale mark 23, and the scale mark 23 is distinguished by different colors in different height intervals. A threaded track is arranged on the inner wall of the lifting sleeve 22 and matched with the protruding thread on the outer wall of the column 21, and the mechanical arm 42 can be lifted vertically by rotating the lifting sleeve 22. The minimum scale value of the scale mark 23 corresponds to the lifting accuracy of the support frame 2, and the operator can adjust the initial force position of the mechanical arm 42 according to the height of the dummy model 5. When different falling heights need to be simulated, the lifting sleeve 22 is locked after being lifted to the corresponding scale, so as to ensure that the force applying mechanism 4 remains stable during the test. The structure is adjusted by a mechanical height, avoiding the cost and complexity of an electric lifting device, and the scale mark 23 provides an intuitive height reference, reduces human operation errors, and improves test repeatability.

[0038] Figure 3 The locking mechanism structure schematic diagram is provided in the utility model. In some embodiments: the locking mechanism 51 contains the electromagnetic adsorption device 511 and the limit buckle 512, the electromagnetic adsorption device 511 is embedded in the surface of the platform 3.

[0039] The locking mechanism 51 contains the electromagnetic adsorption device 511 embedded in the surface of the platform 3 and the limit buckle 512 distributed in the foot of the dummy model 5 (the dummy model 5 in the diagram is only the foot). The electromagnetic adsorption device 511 is composed of a coil winding and an iron core, and generates a magnetic force to adsorb the metal bottom plate at the bottom of the dummy model 5 after being electrified, so that it is firmly fixed in the static state. The limit buckle 512 adopts a spring-loaded jaw structure, and a rubber buffer pad is arranged on the inner side of the jaw, which tightly abuts the ankle joint of the dummy model 5 when closed, preventing displacement before testing. When the test is started, the electromagnetic adsorption device 511 is de-energized to release the magnetic force, and at the same time, the jaw of the limit buckle 512 is driven outward by the motor to open, and the dummy model 5 naturally falls under the traction of the force applying mechanism 4. The design ensures that the dummy model 5 does not deviate in the static preparation stage through the double fixation of electromagnetic adsorption and mechanical buckle, quickly releases the constraint when dynamically released, restores the initial acceleration state of the real fall, and avoids data distortion caused by residual resistance of the fixing device.

[0040] In some embodiments: the force applying mechanism 4 further contains an angle adjuster 43, which is arranged at the joint connection of the mechanical arm 42.

[0041] The joint of the mechanical arm 42 of the force applying mechanism 4 is equipped with an angle adjuster 43, which comprises a worm gear transmission assembly and an angle scale. The input end of the worm gear is connected with a micro stepping motor, which drives the worm gear to deflect by controlling the rotation angle of the worm gear, thereby adjusting the connection angle of the mechanical arm 42 and the dummy model 5. The outer edge of the angle scale is marked with the angle range of the forward inclination, lateral inclination and backward inclination, and the operator can select the preset angle corresponding to different falling directions according to the test requirements. For example, when simulating forward falling, the angle adjuster 43 adjusts the mechanical arm 42 to an initial posture of forward inclination of 15°-30°, and then the electric push rod 41 pushes the dummy model 5 to accelerate forward falling. The worm gear structure of the angle adjuster 43 has self-locking characteristics, which can keep the angle stable during the force applying process, avoiding the rebound of the mechanical arm 42 due to the change of load. This structure replaces complex position programming with mechanical angle adjustment, which reduces the difficulty of equipment control and improves the accuracy of simulation of different falling directions.

[0042] In some embodiments: the material layer 31 comprises a rubber base layer 311 and a replaceable hard panel 312, the hard panel 312 is fixed above the rubber base layer 311 through a clamping groove.

[0043] The material layer 31 is composed of the rubber base layer 311 and the hard panel 312, the rubber base layer 311 is fixed inside the loading platform 3 through a high-strength adhesive, and the surface is provided with clamping grooves distributed at equal intervals, and the cross section of the clamping groove is in T-shaped structure. The hard panel 312 is provided with a protruding guide rail matched with the clamping groove, and is installed by being pushed into the clamping groove horizontally to be completely embedded, and is kept stable by friction. Different hardness of the hard panel 312 is selected according to the ground type requirement before test, for example, a rough surface metal plate is used to simulate cement ground, or a textured engineering plastic plate is used to simulate wooden ground. The rubber base layer 311 provides elastic support below the hard panel 312, simulates the buffering characteristics of the real ground, and when the dummy model 5 falls, the rubber base layer 311 can absorb part of the impact energy, avoiding the rigid vibration of the loading platform 3 to interfere with the sensor data. The modular design of the clamping groove makes the hard panel 312 replacement process not need tool assistance, shortens the test preparation time, and ensures the consistency of the installation precision of different material layers 31.

[0044] Figure 4 The mounting seat structure schematic diagram provided by the utility model is shown. In some embodiments: the mounting seat 52 comprises a pressure sensitive substrate 521 and a shockproof protective cover 522, the shockproof protective cover 522 is fixed on the surface of the dummy model 5 (the dummy model 5 shown in the figure is only the body part).

[0045] The mounting seat 52 is a cylindrical cavity with internal threads made of aluminum alloy, and the bottom of the cavity is welded with a pressure sensing substrate 521. The surface of the pressure sensing substrate 521 is plated with gold to improve electrical conductivity. The shockproof cover 522 is made of silicone material and is injection molded. The outer wall is provided with external threads matching the internal threads of the mounting seat 52. After being screwed in, it completely covers the acceleration sensor 6. During installation, the acceleration sensor 6 is inserted into the cavity of the mounting seat 52, and the bottom electrode is in close contact with the pressure sensing substrate 521. Then, the shockproof cover 522 is rotated to the thread engagement. The elastic deformation of the silicone material can eliminate the assembly gap between the sensor and the surface of the dummy model 5. During testing, the shockproof cover 522 absorbs the high-frequency vibration transmitted by the loading platform 3, avoiding the mixing of vibration noise into the acceleration signal. The pressure sensing substrate 521 monitors the contact pressure of the sensor 6 in real time and triggers an alarm when the pressure is below the threshold value to remind the user to tighten it again. This structure ensures the signal stability of the sensor 6 under dynamic impact through mechanical fastening and material buffering.

[0046] In some embodiments: the acceleration sensor 6 is a three-axis acceleration sensor, including X / Y / Z axis detection units and signal amplifiers.

[0047] The acceleration sensor 6 uses a three-axis MEMS chip package, which integrates X / Y / Z axis detection units. The sensitive axes of the three detection units are orthogonal to each other, and they detect the acceleration changes of the dummy model 5 in the forward, backward, left, right, and upward directions. The signal amplifier is welded to the back of the PCB substrate of the sensor 6. It uses a differential amplifier circuit to amplify the weak charge signal output by the detection unit and transmits it to the data processing module through a shielded cable. During testing, when the dummy model 5 is driven to fall by the force application mechanism 4, the X / Y / Z axis detection units synchronously capture three-dimensional acceleration data, and the signal amplifier suppresses electromagnetic interference during transmission to ensure that the signal waveform is not distorted. For example, when simulating a lateral fall, the amplitude of the Y-axis detection unit output is significantly higher than that of other axes. The data processing module combines the actual impact direction according to the three-axis data and the material parameters of the hard panel 312 to qualitatively analyze the dispersion effect of the anti-falling jacket on lateral impact.

[0048] In some embodiments: the data processing module also includes a wireless transmission unit that connects to an external terminal device through Bluetooth protocol.

[0049] The shell side wall of the data processing module is integrated with a wireless transmission unit, the wireless transmission unit is internally provided with a Bluetooth chip and a PCB antenna, and the chip firmware supports a BLE low-power consumption protocol. After test data is collected by the acceleration sensor 6, the data is input to the data storage unit of the data processing module through a cable for temporary storage, and meanwhile, the wireless transmission unit packages the data into a standard format and broadcasts the data to an external terminal device at a preset time interval. After pairing through a Bluetooth protocol, the external terminal device (such as a tablet computer or a computer) can receive the impact force waveform, the peak acceleration and the test time stamp information in real time, and refresh the data curve on the local interface of the display unit synchronously. The antenna layout of the wireless transmission unit avoids the metal support frame 2 and the loading platform 3, reduces the signal shielding effect, and ensures that the transmission distance covers the typical laboratory range. The design breaks away from the limitation of traditional wired transmission on equipment layout, supports multi-terminal collaborative monitoring and remote data analysis, and improves the flexibility of the test process and the expansibility of data application.

[0050] It should be noted that the terms used in the present application are only for describing specific embodiments, and are not intended to limit the scope of the present application. As shown in the description of the present application, unless otherwise indicated, "one", "a", "an" and / or "the" do not specifically refer to the singular, but also include the plural. The terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method or device. Without more limitations, the element defined by the statement "including one" does not exclude the presence of another identical element in the process, method or device including the element.

[0051] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise specified and limited, the terms "mounting", "connection", "connection" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application.

Claims

1. A test structure for testing the protective performance of a fall- resistant vest, characterized in that The utility model relates to a kind of safety protection device for dummy, including: Base, adjustable height support frame is arranged on the base; Carry platform, detachably installed on the surface of the base, the carry platform includes at least two layers of material of different hardness; Force mechanism, including electric push rod and servo motor driven mechanical arm, is fixed to the top of the support frame; Dummy model, fixed to the surface of the carry platform by locking mechanism, the hip of the dummy model, head is equipped with mounting seat, the dummy model is used to wear anti-falling waistcoat; Acceleration sensor, detachably installed in the mounting seat; Data processing module, electrically connected with the acceleration sensor by cable, including display unit and data storage unit.

2. The test structure of claim 1, wherein: The support frame includes a sleeve jointed stand and a lifting sleeve, and the surface of the stand is provided with a scale mark.

3. The test structure of claim 1, wherein: The locking mechanism includes an electromagnetic attraction device and a limiting buckle, and the electromagnetic attraction device is embedded in the surface of the carry platform.

4. The test structure of claim 1, wherein: The force mechanism further includes an angle adjuster, which is arranged at the joint connection of the mechanical arm.

5. The test structure of claim 1, wherein: The material layer includes a rubber base layer and a replaceable hard panel, and the hard panel is fixed above the rubber base layer by a clamping groove.

6. The test structure of claim 1, wherein: The mounting seat includes a pressure-sensitive substrate and a shockproof cover, and the shockproof cover is fixed to the surface of the dummy model by a threaded connection.

7. The test structure of claim 1, wherein: The acceleration sensor is a three-axis acceleration sensor, including X / Y / Z axis detection units and a signal amplifier.

8. The test structure of claim 1, wherein: The data processing module further includes a wireless transmission unit, which is connected to an external terminal device through Bluetooth protocol.

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