Safety belt testing device

Abstract

The utility model discloses a safety belt testing device which comprises a testing support and a human body model, and a safety belt is worn on the human body model. A first electromagnet is arranged at one end, close to the manikin, of the top of the testing support, a second electromagnet is arranged at the bottom of the testing support, a first iron piece is arranged at the top of the manikin and located under the first electromagnet, a second iron piece is arranged at the bottom of the manikin, and the orthographic projection of the second iron piece falls within the section range of the second electromagnet. The first electromagnet and the second electromagnet are arranged at the top and the bottom of the testing support respectively, the first iron piece and the second iron piece are arranged in the human body model, and the magnetic force change of the first electromagnet or the second electromagnet can be changed by controlling the magnitude of current, so that the attraction force of the first electromagnet or the second electromagnet to the human body model is changed; and therefore, the influence of different acting forces on the safety belt can be tested, and the test data can be greatly enriched.

Description

Technical Field

[0001] The utility model belongs to the technical field related to seat belt detection, and particularly relates to a seat belt testing device. Background Art

[0002] A seat belt is a personal protective equipment for preventing high-altitude workers from falling accidents. It consists of a belt, a rope and metal fittings, and is collectively called a seat belt, which is suitable for high-altitude operations such as pole surrounding, hanging and climbing. At present, high-altitude operation is a relatively dangerous high-altitude operation. Therefore, during high-altitude operation, the operator needs to connect a seat belt to his body. Therefore, during high-altitude operation, the seat belt is an essential device to ensure the personal safety of high-altitude operators. The performance of the seat belt is mainly to ensure the safety of high-altitude operators. In order to ensure the quality of the seat belt, it is necessary to conduct a tensile test on the produced seat belt. When conducting a tensile test on the seat belt, a tensile test device is required to measure the quality of the seat belt. The following problems exist in the existing seat belt tensile test device: it is not convenient to simulate the real falling situation, so the tensile force generated by a high-altitude fall cannot be truly measured. And the weight of the dummy is fixed during the test, and multiple groups of tests on the force-bearing situations of different body weights cannot be carried out, thus reducing the accuracy of the seat belt tensile test. Therefore, a seat belt testing device is proposed to solve the above problems. Summary of the Invention

[0003] In view of the above problems, the utility model proposes a seat belt testing device, which can test the tensile force of the seat belt under different working conditions, obtain more diverse and accurate test data, and is beneficial to improving the use safety of the seat belt.

[0004] To achieve the above object, the utility model adopts the following technical scheme: A seat belt testing device includes a test bracket and a mannequin, and a seat belt is worn on the mannequin. A driving member is provided at the top of the test bracket. The driving member includes a motor and a safety rope, the safety rope is connected to the seat belt, and a tensile force sensor is provided on the safety rope; a first electromagnet is provided at one end near the mannequin at the top of the test bracket, and a second electromagnet is provided at the bottom of the test bracket. A first iron piece is provided at the top of the mannequin, the first iron piece is directly below the first electromagnet, a second iron piece is provided at the bottom of the mannequin, and the orthographic projection of the second iron piece falls within the cross-sectional range of the second electromagnet.

[0005] Preferably, a buffer net is provided between the mannequin and the second electromagnet, and the buffer net is used to receive the descending mannequin.

[0006] Preferably, it further includes a first controller, and the first controller is electrically connected to the first electromagnet to control the magnitude of the current passing through the first electromagnet.

[0007] Preferably, a second controller is further included, and the second controller is electrically connected to the second electromagnet for controlling the magnitude of the current passing through the second electromagnet.

[0008] Preferably, the driving member is a motor.

[0009] Preferably, the number of the motors and the number of the safety ropes are both 2. The two motors are symmetrically arranged with the center of the first electromagnet as the center. The output end of each motor is connected to a safety rope. The other ends of the two safety ropes are both connected to the safety belt, and the two safety ropes are symmetric along the center line of the mannequin.

[0010] Preferably, the safety rope and the safety belt are detachably connected by a hook.

[0011] The beneficial effects of the present utility model are as follows: The present utility model provides a safety belt testing device. By respectively arranging a first electromagnet and a second electromagnet at the top and bottom of the testing bracket, and arranging a first iron piece and a second iron piece inside the mannequin, the magnetic force change of the first electromagnet or the second electromagnet can be changed by controlling the magnitude of the current, thereby changing the attraction force of the first electromagnet or the second electromagnet on the mannequin, and further changing the acting force of the mannequin on the safety belt. The influence of different acting forces on the safety belt can be tested, which greatly enriches the test data. When the second electromagnet is not powered on and the first electromagnet is powered on, under the action of a suitable magnetic field, the mannequin is attracted to the top of the testing bracket. At this time, controlling the first electromagnet to power off can realize the sudden drop of the mannequin, fully simulating the actual action scenario of the safety belt, and making the test data more accurate and more referenceable. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of a safety belt testing device of the present utility model.

[0013] In the figure: 1 - testing bracket, 2 - mannequin, 3 - safety belt, 4 - second iron piece, 5 - motor, 6 - first electromagnet, 7 - safety rope, 8 - tension sensor, 9 - first iron piece, 10 - buffer net, 11 - second electromagnet. Detailed Embodiments

[0014] In order to enable those skilled in the art of the present technology to better understand the solution of the present utility model, the present utility model will be further described in detail below with reference to the drawings. The described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0015] Embodiment

[0016] AsFigure 1 As shown in the figure, this embodiment proposes a seat belt 3 testing device, which includes a testing bracket 1 and a mannequin 2. A seat belt 3 is worn on the mannequin 2. A driving member is provided at the top of the testing bracket 1. The driving member includes a motor 5 and a safety rope 7. The safety rope 7 is connected to the seat belt 3. A tension sensor 8 is provided on the safety rope 7. The tension sensor 8 is electrically connected to a display for displaying the tension value. Further, a memory is provided in the display, which can store test data. A first electromagnet 6 is provided at one end of the top of the testing bracket 1 near the mannequin 2, and a second electromagnet 11 is provided at the bottom of the testing bracket 1. A first iron piece 9 is provided at the top of the mannequin 2. The first iron piece 9 is located directly below the first electromagnet 6. A second iron piece 4 is provided at the bottom of the mannequin 2. The orthographic projection of the second iron piece 4 falls within the cross-sectional range of the second electromagnet 11. An electromagnet is a device that generates an electromagnetic field when an electric current is applied. A conductive winding matching its power is wound around the iron core. This current-carrying coil has magnetism like a magnet and is called an electromagnet (electromagnet). After the first electromagnet 6 / second electromagnet 11 is energized, it generates magnetism and generates a suction force on the first iron piece 9 / second iron piece 4 respectively. Generally speaking, the magnetic field generated by an electromagnet is related to the magnitude of the current, the number of turns of the coil, and the ferromagnetic body in the center. When the distribution of the coil and the ferromagnetic body remain unchanged, the magnetic field strength can be adjusted by adjusting the magnitude of the working current. Usually, the greater the working current, the greater the magnetic field strength, and the smaller the working current, the smaller the magnetic field strength. It should be noted that in order to demagnetize the first electromagnet 6 or the second electromagnet 11 immediately when the power is cut off, soft iron or silicon steel materials with relatively fast demagnetization are often used for manufacturing. Such an electromagnet has magnetism when energized and the magnetism disappears immediately after the power is cut off.

[0017] A buffer net 10 is provided between the mannequin 2 and the second electromagnet 11. The buffer net 10 is used to receive the descending mannequin 2, prevent potential safety hazards caused by the seat belt 3 breaking and the mannequin 2 falling, and also facilitate the replacement of the seat belt 3 on the mannequin 2.

[0018] It also includes a first controller, which is electrically connected to the first electromagnet 6 for controlling the magnitude of the current passing through the first electromagnet 6. The first controller and the first electromagnet 6 are connected to the circuit through wires, and their connection method is the prior art and will not be elaborated here.

[0019] It further includes a second controller, which is electrically connected to the second electromagnet 11 and is used to control the magnitude of the current passing through the second electromagnet 11. Both the first controller and the second controller are current regulators. The current regulator is used to adjust the current in the circuit to achieve precise current control. The current regulator can adjust the current by changing the resistance value in the circuit or by other means, by changing the magnetic force flowing through the first electromagnet 6 or the second electromagnet 11. The current regulator can also control the on / off of the current. For example, when the current passing through the first electromagnet 6 is 0, the first electromagnet 6 can be immediately demagnetized, the attraction force of the first electromagnet 6 on the first iron piece 9 in the mannequin 2 disappears, and the mannequin 2 shows a sudden descending trend. The force on the safety belt 3 can be measured by the cooperation of the safety belt 3 and the safety rope 7 at this time.

[0020] The driving member is a motor 5.

[0021] The number of the motors 5 and the number of the safety ropes 7 are both 2. The two motors 5 are symmetrically arranged with the center of the first electromagnet 6. The output end of each motor 5 is connected to a safety rope 7. The other ends of the two safety ropes 7 are both connected to the safety belt 3 and the two safety ropes 7 are symmetric along the center line of the mannequin 2. The two motors 5 run synchronously to realize the synchronous retraction and release of the two safety ropes 7, so as to achieve the purpose of lifting and lowering the mannequin 2.

[0022] The safety rope 7 and the safety belt 3 are detachably connected by a hook, which is convenient for installation and disassembly.

[0023] The test process of the safety belt 3 testing device is as follows:

[0024] First, dress the mannequin 2 and the safety belt 3 well and connect the safety rope 7 and the safety belt 3 as a whole. Then start the motor 5 and slowly lift the mannequin 2. At this time, provide a slow upward pulling force, and the pulling force borne by the safety belt 3 under static conditions can be obtained through the force measuring sensor. When the mannequin 2 is lifted to near the top of the test bracket 1, the first controller controls the first electromagnet 6 to be energized and adjusts the current magnitude. The first electromagnet 6 generates a magnetic field to generate an attraction force on the mannequin 2, so that the self-gravity of the mannequin 2 is balanced with the upward attraction force. Then the motor 5 rotates in the reverse direction to release part of the safety rope 7 to provide a certain descending margin, and then controls the current to be disconnected. The mannequin 2 drops suddenly, and the pulling force borne by the safety belt 3 under dynamic conditions can be obtained through the force measuring sensor. Then control the second electromagnet 11 to be energized by the second controller and stagewise adjust the current magnitude, so that the downward attraction force on the mannequin 2 increases step by step, so as to test the influence of different weights on the safety belt 3.

[0025] The utility model provides a seat belt testing device, which realizes the purpose of changing the attraction force on a mannequin by controlling the current magnitudes of a first electromagnet and a second electromagnet, so that the stress conditions of the seat belt under different weight simulation conditions can be tested, effectively enriching the data. It can also achieve a sudden drop of the mannequin, fully simulating the working conditions of the seat belt in reality and making the data more referential.

[0026] The preferred embodiments of the utility model disclosed above are only used to help illustrate the utility model, and do not limit the utility model to only the specific embodiments described. Obviously, other modifications and changes can be made according to the content of this specification. The embodiments selected and specifically described in this specification are for better explaining the principle and practical application of the utility model, so that those skilled in the art can well understand and utilize the utility model. It is not a limitation of the utility model, and any scheme obtained by simply modifying the utility model belongs to the protection scope of the utility model.

Claims

1. A seat belt testing device, comprising a testing bracket and a mannequin, with a seat belt worn on the mannequin, characterized in that: A driving member is provided at the top of the test bracket. The driving member includes a motor and a safety rope. The safety rope is connected to the safety belt, and a tension sensor is provided on the safety rope. A first electromagnet is provided at one end of the test bracket near the mannequin at the top, and a second electromagnet is provided at the bottom of the test bracket. A first iron piece is provided at the top of the mannequin, and the first iron piece is located directly below the first electromagnet. A second iron piece is provided at the bottom of the mannequin, and the orthographic projection of the second iron piece falls within the cross-sectional range of the second electromagnet.

2. The seat belt testing device according to claim 1, characterized in that: A buffer net is provided between the mannequin and the second electromagnet, and the buffer net is used to receive the descending mannequin.

3. The seat belt testing device according to claim 1, wherein: It further includes a first controller, and the first controller is electrically connected to the first electromagnet for controlling the magnitude of the current passing through the first electromagnet.

4. The seat belt testing device according to claim 1, characterized in that: It further includes a second controller, and the second controller is electrically connected to the second electromagnet for controlling the magnitude of the current passing through the second electromagnet.

5. The seat belt testing device according to claim 1, characterized in that: The driving member is a motor.

6. The seat belt testing device according to claim 5, wherein: The number of the motors and the number of the safety ropes are both 2. The two motors are symmetrically arranged with the center of the first electromagnet as the center. The output end of each motor is connected to a safety rope, and the other ends of the two safety ropes are both connected to the safety belt and the two safety ropes are symmetric along the center line of the mannequin.

7. The seat belt testing device according to claim 6, characterized in that: The safety rope and the safety belt are detachably connected by a hook.

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