Fatigue testing device and testing method for simulating entry and exit of a human body in car seatsأداة الاختبار –

Fatigue testing device and testing method for simulating the entry and exit of a human body in a car seat

The seat is an important part of the car and its driving comfort is closely related to the convenience of the driver\'s use and the passenger\'s driving experience. . Evaluating seat comfort and reliability involves many key components, such as headrests, recliners, slides, back cushions, seat cushions, armrests, etc. Among them, the simulation test of the human body entering and exiting the seat to test the fabric wear resistance of the seat with cover is more complicated, and the test is more difficult than the test of other parts.

The simulated human body entering and exiting the car seat fatigue test mainly uses a three-dimensional dummy model with a mask to test the wear resistance of the fabric of the entire seat, simulating the conditions of use of the human body. get in and out of the car. After testing The seat cover should not break, clump or come apart, or leak. Damage is not allowed and sutures must not break. Due to the different spaces of different vehicles, the actual movement trajectories of passengers when entering and exiting the door are different. Therefore, different vehicle models specify different movement trajectories of the three-dimensional dummy model, so as to more realistically evaluate the reliability of use. At the same time, the whole process of simulating the entry and exit of the human body into the car seat generally includes both translational and rotational movements, as well as force loading, and requires cyclical actions repeated more than 15,000 times. Therefore, the fatigue test device that simulates the enting and exiting the human body in the car seat should have high control precision, good repeatability and good versatility. Currently, there are few equipments on the market suitable for fatigue testing of simulating the entry and exit of the human body in car seats, and most of them use a combination of multiple actuators to test the seat.

Content of the invention
In view of the above-mentioned disadvantages of the prior art, the object of the present invention is to provide a simulated human body entering and exiting a car seat with precision control, good repeatability and strong versatility. Fatigue test apparatus.
In order to achieve the above and other related objects, the present invention provides a fatigue testing device for simulating the human body entering and exiting a car seat, which includes a multi-axis driver, output shaftEnd of the multi-axis drive is connected to a flange connection frame. The flange connection frame is connected to the first force sensor, the first force sensor is connected to the loading head of the seat cushion, and the multi-axis driver and the first force sensor are connected to a controller.
Preferably, the flange connection frame is additionally equipped with a backrest loader, the backrest loader is hingedConnected to the flange connection frame, the backrest loader is connected to a second force sensor, and the third force sensor is connected to the backrest loader. The second force sensor is connected to the backrest loading head, and the second force sensor is connected to the controller.
Preferably, the flange connection frame is provided with a through slot, and the file charger is located in the through slot and is hingedly connected to the flange connection frame.
Frompreferably, the second force sensor is connected to the backrest loading head via an articulated bearing.
Preferably, the folder loader is a hydraulic cylinder, a pneumatic cylinder or an electric cylinder.
Preferably, the multi-axis drive is a six-axis drive, and the six-axis drive. The drive includes a first drive shaft which can rotate horizontally, a second drive shaft which is hinged to the top of the first drive shaft. and rotates up and down with the hinge point as the center of the circle, and a third drive shaft which is hinged with the second drive shaft which rotates up and down with the hinge point as the center of the circle. , a fourth drive shaft which is rotatably connected to the third drive shaft and can rotate about its own axis, a fifth drive shaft which is hingedly connected to thefourth drive shaft which rotates up and down with the hinge point as the center of the circle, and a fifth drive shaft which is rotatably connected to the fifth drive shaft which can rotate around its own axis. The sixth drive shaft, one end of the flange connection frame is fixedly connected to the end face of the sixth drive shaft.

The invention also relates to a test method for simulating the fatigue test of the human body entering and exiting a car seat, which comprises the following steps:
1 ) Define a seat cushion loading head and a backrest loading head. The seat cushion loading head and the backrest loading head are both connected to the force sensor. The seat cushion lloading head is connected to a multi-axis driver. The multi-axis driver can drive the seat cushion loading head to move.ace back and forth and rotates in the horizontal direction. The file loading head is connected to a file feeder, and the file feeder can swing back and forth in the vertical direction;
2) A controller is provided, and the controller is connected to the multi driver -axes, the backrest loader and the force sensor is connected, and the controller can control the work of the multi-axis driver and the backrest loader;
3) Connect the seat cushion loading head and the head loading the backrest to the buttocks and rear of the dummy model respectively, according to the simulation test requires the controller to control the actions of the multi-axis driver and the backrest loader, so that the seat cushion loading head and the backrest loading head drives the dummy model to move on the car seat according to the operating trajectory, operating speed and loading force required by the vehicle.proof.
[0012] Preferably, the controller can record the pressure signal returned by the force sensor and the position information of the multi-axis pilot itself in real time. The pressure signal returned by the force sensor and the position information of the multi-axis driver itself can monitor and reproduce the entire testing process.
[0013] As mentioned above, the fatigue testing device and method of a simulated car seat entering and exiting a car seat and the testing method of the present invention have the effects following beneficial effects: The simulated human body entering and exiting a car seat and the fatigue testing device method adopt multi-axis driver driving The seat cushion loading head moves, because it has multiple degrees of freedom and can simulate various complex motion trajectories, so that it can simulate the trajectories required by various tests. Therefore, the testing device has good versatility and can be used for various seat tests. This haIl simulation device has the advantages of high control precision and good repeatability. In addition, this kind of test device can well monitor and reproduce the whole test process through the force signal returned from the force sensor in real time and the self-position information recorded in real time by the driver. multi-axis, thereby ensuring the accuracy of test results and the safety of the testing process. Traceability.

Detailed Embodiments
The following specific embodiments are used to illustrate the practice of the present invention. Those familiar with this technology can easily understand other advantages and advantages of the present invention from the content disclosed in this description. effect.
He sucksjust noted that structures, proportions, sizes, etc. shown in the drawings attached to this specification are for illustration purposes only. The content disclosed in the book is intended for those who are familiar with this technology to understand and read, and is not used to limit the implementation of the present invention, therefore it has no technical significance. Any modification of structure, change of proportional ratio or adjustment of size, without affecting the effects and objectives that can be achieved by the present invention, must always fall within the scope covered by the technical content disclosed in the present invention. At the same time, terms such as \"upper\", \"lower\", \"left\", \"right\", \"middle\" and \"one\" cited in this description are only for convenience of description and are not used to limit this specification. . The scope of the invention which can be implemented,as well as changes or adjustments in their relative relationships, as long as there is no substantial change in the technical content, shall also be considered the scope of the invention that can be implemented.
The present invention relates to a fatigue test device for simulating the entry and exit of a human body in a car seat, which mainly comprises a drivière 1, a first force sensor 2, a frame connecting frame 3, a seat cushion loading head 4, a backrest loading head 5, the backrest loading head 6 and the second force sensor 12. One end of the flange connecting frame 3 is fixedly connected to the terminal output shaft of the multi-axis drive 1, the other end of the flange connection frame 3 is connected to one end of the first force sensor 2, and the other end of the first force sensor 2 is connected to the connections of the cushion loading head 4. The drivermulti-axis 1 can drive the loading head of the seat cushion 4 to move and rotate, simulating the movement trajectory of the human body when entering and exiting the car seat, and can return force loading to which the seat is actually subjected. time through the first force sensor 2 simultaneously.
As a preferred embodiment, the multi-axis drive I is a six-axis drive, which comprises a horizontally rotating first drive shaft 1-1, articulated with the first drive shaft 1- 1 and topped.with the The hinge point is the second drive shaft 1-2 which rotates up and down in the center of the circle; the third drive shaft 1-3 which is hinged to the second drive shaft 1-2 and can rotate up and down with the hinge point as the center of the circle; the rotation is connected to the third drive shaft. On the shaft and the fourth drive shaft1-4 which can rotate around its own axis, the fifth drive shaft 1-5 which is hinged to the fourth drive shaft 1-4 and rotates up and down with the hinge point as center of the circle and is rotatably connected to the fifth drive shaft. The shaft 1-5 can rotate around the sixth drive shaft 1-6, and one end of the flange connection frame 3 is fixedly connected to the end face of the sixth drive shaft 1-6. Using a six-axis drive can cause the loading head of the seat cushion 4 to move in six degrees of freedom on the horizontal plane, so that various complex motion trajectories can be simulated very conveniently for meet the requirements of various tests.

In addition to carrying out simulation tests on the seat cushion through the seat cushion loading head 4, the device is also equipped with a head ofbackrest loading 6, through which the seat back can be Perform simulated loading tests. The backrest loading head 6 is fixed on a backrest loader 5, and a second force sensor 12 is provided between the backrest loader 5 and the backrest loading head 6. The flange connection frame 3 is provided with \'a through slot through which the backrest loader 5 passes and is hingedly connected to the flange connection frame 3. The backrest loader 5 can swing back and forth in the vertical direction. The second force sensor 12 is connected to the backrest loading head 6 via the joint bearing 7, so that the second force sensor 12 can be automatically adjusted with the oscillation angle of the backrest loader 5, thus making the force measurement more accurate. The 5 folder loader can be selected as one of hya hydraulic cylinder, pneumatic cylinder or electric cylinder.ric, so that its loading force can be controlled by a controller. An angle sensor can be provided at the position of the backrest loading head 6, and the angle of the backrest loading head 6 can be measured by the angle sensor. At the same time, a drive device is configured to be connected to the backrest loader 5, and the swing angle of the backrest loader 5 is controlled by the drive device.

The multi-axis driver 1, the first force sensor 2, the folder loader 5 and the second force sensor 12 mentioned above are all connected to a controller, through which the driver multi-axis 1 and the backrest can be controlled The movement trajectory, movement speed and loading force of the loader 5 can be collected in real time by the first force sensor 2, the second force sensor 12 and the signal of loading force returned. According to the signal of floading orce and the multi-axis driver 1\'s own posture information, the angle signal returned from the angle sensor can well monitor the test process and reproduce the entire test process, thus ensuring the accuracy of the test results and traceability of the test process.

The invention also discloses a test method for simulating the fatigue test of the human body entering and exiting a car seat, which includes the following steps: adjusting a head seat cushion loading head 4 and a backrest loading head 6. , the seat cushion loading head 4. The backrest loading head 6 is connected to the force sensor, so that the loading head of the seat cushion is connected to a multi-axis driver I. The multi-axis driver I can drive the seat cushion loading head 4 to move back and forth and rotate in the horizontal direction. The folder loading head 6 isconnected to a multi-axis drive I. The file feeder 5 is connected, and the file feeder 5 can swing back and forth in the vertical direction. A controller is provided, which is connected to the multi-axis driver 1, the folder loader 5 and the force sensor, and controls the operation of the multi-axis driver and the folder loader through the controller. Connect the seat cushion loading head 4 and the backrest loading head 6 to the buttocks and back of the dummy model respectively. According to the requirements of the simulation test, control the actions of the multi-axis driver and the backrest loader through the controller to make the seat cushion loading head and the backrest loading head press on the test. The required running trajectory, running speed and loading force drive the dummy model. move around in the car seat.

As a specific implementation, as shown in Figure 2. In this modeembodiment, a six-axis universal robot is selected as the multi-axis driver I as the six-axis driver, and the six-axis robot driver I is directly fixed and installed on the base plate 8 by screwing. The car seat 10 to be tested is fixedly installed on the base plate 8 through the seat fixing device 11. Base plate 8 selects T-shaped gr The oove cast iron platform to use is convenient to adjust the position of the seat 10 and multi-axis driver 1 like this. The indenter made by a three-dimensional dummy model 9 is selected, and the dummy model 9 is a 50% dummy according to SAEJ826-2002. The penetrator is wrapped with a layer of 12mm foam and denim, and the appropriate weight is configured on the penetrator to keep the penetrator at 44.5 kg. The cushion loading head 4 and the backrest loading head 6 are respectively fixedly connected to the buttocks and the back of the dummy model (9).

Through The movement trajectory of the dummy model 9 which simulates the human body entrance and exit test is set through the controller, as shown in Figure 3: In the figure, (a) is the initial position of the dummy model 9, and the centerline of the dummy model 9 is connected to the tested car seat 10. The angle between the centerlines is 30°, slide horizontally into the tested car seat 10 and sink into the edge and the seat cushion back.edge is about 25mm respectively. When you reach position (b), rotate 30° so that the centerline of Dummy Model 9 is aligned with the car seat being tested. Center line of chair 10 is aligned, i.e. position (c), then dummy model 9 moves to position (d) and loads 445 N on seat cushion and backrest ; output, dummy model 9 remains loaded with 445N until position (c) is unloaded, and returns to positioninitial (a). The test is performed 15,000 times at a frequency of 4.5 times/minute, then stopped and reset.

The motion trajectory shown in Figure 3 is just one type of fatigue test that simulates the human body moving in and out of a car seat. For different tests, the movement trajectory, movement speed, loading time and force will be different. Each The specific parameters of each test can be set via the controller of the multi-axis drive and file feeder.

The multi-axis driver used in the simulated human body incoming and outgoing car seat fatigue testing device and testing method drives the loading head of the seat cushion to move. Since it has multiple degrees of freedom, it can simulate various complex motion trajectories, so that it can simulate the trajectories required by various tests, so that the device de test has good versatility and can perform various seat simulation tests. This simulation device also has the advantages of high control precision and good repeatability. In addition, this kind of test device can well monitor and reproduce the whole test process through the force signal returned from the force sensor in real time and the self-position information recorded in real time by the driver. multi-axis, thereby ensuring the accuracy of test results and the safety of the testing process. Traceability. Therefore, the present invention effectively overcomes various shortcomings of the prior art and has high industrial use value.

The above embodiments illustrate only the principles and effects of the present invention, but are not intended to limit the present invention. Anyone familiar with this technology can modify or change thes embodiments above without departing from the spirit and scope of the invention. Accordingly, all modifications or equivalent changes made by those of ordinary skill in the technical field without departing from the spirit and technical ideas disclosed in the present invention will always be covered by the claims of the present invention.

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