A sensor for child dummies used in automobile crash tests

Abstract

The present invention provides a sensor for child dummies used in automobile collision tests, comprising: an abdominal bladder, which includes a plurality of chambers, each chamber simulating the shape of one of the organs in the human abdomen, the outer walls of two adjacent chambers are interconnected so that the chambers together form a whole, and each chamber is filled with liquid; a pressure measuring unit, which is used to output an electrical signal of the pressure of the liquid in each chamber, and each chamber is provided with at least one pressure measuring unit; a support frame, which is used to support and fix the abdominal bladder, so that each chamber is in a set position that matches the position of the human abdominal organs. The present invention adopts the design of the chambers into various abdominal organs, so it can more realistically reflect the damage of the child's abdominal organs caused by the child safety seat when a real traffic accident occurs; and the support frame is used to support and fix the abdominal bladder, so that each chamber is in a set position corresponding to the child's abdominal organ, so as to further ensure the authenticity of the simulation and the accuracy of the measurement.

Description

Technical Field

[0001] The present invention relates to the field of motor vehicle safety testing, and in particular to a sensor for child dummies used in automobile collision tests. Background Art

[0002] In order to improve the safety of transportation passengers, vehicles are generally equipped with safety systems, such as child safety seats, seat belts, airbags, etc. Although the main function of these safety systems is to protect vehicle occupants, these safety systems may cause various physical injuries to the occupants in the event of a traffic accident.

[0003] The present invention is aimed at the study of the injuries of children caused by child safety seats in traffic accidents, and mainly studies the biomechanics of the impact on the abdomen of children in traffic accidents. At present, there is an abdominal dual pressure sensor APTS used on the Q series dummies, which is used for collision testing and is used to evaluate whether the restraint system meets the injury adjustment standard by recording the pressure of the abdomen during the collision. The APTS has been patented by INSTITUT FRANCAISDES SCIENCES ETTECHNOLOGI ESDES, such as the PCT application with publication number WO2013054061A1, which discloses a pressure sensor, including at least two flexible waterproof pressure measurement chambers, the at least two chambers are symmetrically arranged on both sides of the midsagittal plane of the abdomen or chest of the torso part on the dummy side, the chambers are filled with incompressible fluid, and each chamber includes at least one pressure measurement unit, the pressure measurement unit is capable of delivering an electrical signal indicating the pressure of the fluid in the pressure measurement chamber at its output. Compared with earlier pressure sensors, this pressure sensor is more stable when used in a human body model, is not prone to displacement, and has reliable pressure measurement performance. It can respond to loads including frontal, lateral or oblique loads relative to the dummy, thereby accurately estimating the risk of injury to the abdominal organs of children in safety seats during traffic accidents.

[0004] However, the patent has the following deficiencies: (1) at least two chambers are symmetrically arranged on both sides of the midsagittal plane, which cannot accurately simulate the positions of various organs in the human abdomen, so the pressure measurement results are not very accurate; (2) each chamber of the patent is an air bag of the same size, so the pressure they are subjected to is consistent, but the abdominal organs of a real human body are subjected to different forces when being squeezed by the safety system, which also leads to inaccurate final pressure measurement results; (3) the pressure sensor requires a special abdominal block to install the pressure sensor. When the abdominal pressure sensor needs to be used for testing, the original abdominal block of the human model needs to be disassembled and replaced with the special abdominal block equipped with the pressure sensor, which is troublesome to disassemble and assemble, and the weight of the abdomen of the human model may be changed after replacement, resulting in inaccurate data measurement; (4) each chamber is independently installed in the special abdominal block, so it is also troublesome to install the chamber.

[0005] Therefore, it is very necessary to develop a special sensor for child dummies with high simulation and measurement accuracy for automobile collision tests. Summary of the invention

[0006] The purpose of the present invention is to provide a special sensor for child dummies for automobile collision tests in view of the above-mentioned problems and shortcomings, so as to effectively solve the problems that the existing pressure sensors cannot truly simulate the abdominal organs of the human body, have poor measurement accuracy, and are cumbersome to install and disassemble.

[0007] The technical solution of the present invention is achieved in this way:

[0008] The sensor for child dummies used in automobile collision tests described in the present invention is used to measure the pressure of the restraint system on the abdominal organs of a human model during the collision test, and is characterized in that it includes: an abdominal sac, the abdominal sac includes a plurality of chambers, each of the chambers simulates the shape of one of the organs in the human abdomen, the outer walls of two adjacent chambers are interconnected so that all the chambers together form a whole, and each of the chambers is filled with liquid; a pressure measuring unit, used to output an electrical signal of the pressure of the liquid in each of the chambers, and each of the chambers is provided with at least one pressure measuring unit; a supporting frame, used to support and fix the abdominal sac so that each of the chambers is in a set position consistent with the position of the human abdominal organs; and also used to be connected and fixed to the abdomen of the human model.

[0009] In some embodiments, in order to achieve controllable weight of each chamber, each chamber includes a liquid holding chamber and at least one gas holding chamber, the liquid holding chamber is isolated from each gas holding chamber, the gas holding chamber is filled with gas, and the liquid is filled in the liquid holding chamber.

[0010] Furthermore, in order to improve the accuracy of the measurement, the gas chamber is arranged on other cavity walls of the liquid chamber other than the cavity wall that is squeezed in the collision test.

[0011] Furthermore, in order to ensure that the weight of each chamber is consistent with the weight of the human abdominal organ it simulates, the capacity of the liquid cavity and the capacity of the gas cavity on each chamber are allocated and set according to the weight of the simulated human organ corresponding to the cavity, so as to ensure that the weight of the cavity is consistent with the weight of the simulated human organ after the liquid cavity is filled with liquid and the gas cavity is filled with gas.

[0012] In some embodiments, the chambers include at least a liver chamber, a stomach chamber, a pancreatic chamber, a spleen chamber, a kidney chamber and an intestinal chamber, and the shapes and sizes of the liver chamber, the stomach chamber, the pancreatic chamber, the spleen chamber, the kidney chamber or the intestinal chamber are consistent with the simulated human abdominal organs.

[0013] In some embodiments, a through opening is provided at the connection between the inner walls of two adjacent chambers, and one of the chambers is provided with an opening for allowing the liquid to be injected into the chamber.

[0014] Alternatively, in some other embodiments, the inner walls of two adjacent chambers are sealed and not connected, and each chamber is provided with an opening for injecting the liquid into the chamber.

[0015] In some embodiments, the present invention further includes a columnar bladder, which is installed at the front end or the rear end of the abdominal bladder, the columnar bladder is filled with the liquid, and two micro strain gauges are provided on the columnar bladder.

[0016] In addition to the abdominal bladder simulating the organs in the entire abdomen, the support frame used to support and fix the abdominal bladder is also designed to simulate the shape of the human spine. Specifically, the support frame includes a main rod located in the middle to simulate the human spine and a connecting rod extending horizontally from the main rod, and the rear end face of the abdominal bladder is connected to the connecting rod.

[0017] Furthermore, in order to prevent the support frame from interfering with the pressure measurement of the abdominal bladder, the support frame is arranged near the back wall of the abdominal cavity of the human body model, and the main rod is connected and fixed to the back wall of the abdominal cavity of the human body model.

[0018] In some embodiments, a connecting plate is provided at the end of the connecting rod, and the connecting plate is cooperatively connected to the rear end cavity wall surface of at least one chamber of the abdominal bladder; and / or a connecting position is provided on the rear end cavity wall surface of at least one chamber of the abdominal bladder, and the connecting position is cooperatively connected to the connecting rod or the main rod.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention adopts an integral abdominal bladder, and the multiple chambers on the abdominal bladder are designed to simulate the shape of one of the organs in the human abdomen, and at least one pressure measuring unit is provided in each chamber, so that the abdominal organs of a child sitting in a child safety seat can be more realistically simulated, and the pressure conditions of each abdominal organ can be more accurately measured.

[0021] 2. Since a support frame is used to support and fix the abdominal bladder, each chamber is in a corresponding set position that conforms to the position of the abdominal organs of the human body, thereby further ensuring the authenticity of the simulation and the accuracy of the measurement.

[0022] 3. The support frame is connected and fixed to the abdomen of the human model, so there is no need to set up a special abdominal block. The overall installation of the pressure sensor can be completed by fixing the support frame to the original abdominal block of the human model. Therefore, the installation is convenient and quick, and the overall weight is consistent with the abdominal weight of the simulated child, thereby further ensuring the accuracy of the measurement data.

[0023] 4. Since it will not be affected by the special abdominal block, the abdominal bladder of the present invention can respond to collision test measurements in more directions, including but not limited to the front, back, side, inclined, top, bottom and other directions. Therefore, it can comprehensively evaluate the abdominal organ damage of children in child safety seats in various traffic accidents.

[0024] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the sensor dedicated to a child dummy of the present invention;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the abdominal bladder of the present invention;

[0027] Figure 3 is a schematic diagram of a horizontal cross-sectional structure of a first example of a chamber of the present invention;

[0028] Figure 4 is a schematic diagram of a horizontal cross-sectional structure of a second example of a chamber of the present invention;

[0029] Figure 5 It is a schematic cross-sectional structure diagram of a first embodiment of the abdominal bladder of the present invention;

[0030] Figure 6 is a schematic cross-sectional structure diagram of a second example of an abdominal bladder of the present invention;

[0031] Figure 7 Another example of a three-dimensional structural schematic diagram of a sensor dedicated to a child dummy of the present invention;

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the support frame of the present invention;

[0033] Fig. 9 The figure is a three-dimensional structural schematic diagram of the present invention installed on a human body model.

[0034] Reference numerals:

[0035] Abdominal sac 1;

[0036] liver chamber 11, stomach chamber 12, pancreas chamber 13, gallbladder chamber 14, small intestine chamber 15, large intestine chamber 16;

[0037] Liquid chamber 101, gas chamber 102;

[0038] Support frame 2;

[0039] Main rod 21, connecting rod 22, connecting plate 23, locking hole piece 24, round hole 25, extension plate 26;

[0040] Pressure measuring unit 3;

[0041] Opening 4;

[0042] Sealing cover 5;

[0043] Passage 6;

[0044] Plug hole 7;

[0045] Human body model 8;

[0046] Head 81, chest 82, abdomen 83, limbs 84;

[0047] Gas nozzle 9;

[0048] Columnar capsule 10. DETAILED DESCRIPTION

[0049] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0050] In the description of the present invention, it is necessary to understand that the terms "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features, and are used to distinguish the described features, without distinction of order or importance.

[0051] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "matching", "connecting", "connection", and "installation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The abdominal organ pressure sensor of the human body model 8 of the present invention will be described below in conjunction with the accompanying drawings.

[0054] The present invention relates to a human model 8 abdominal organ pressure sensor, which is used to measure the pressure of the restraint system (including child safety seats, safety belts, etc.) on various organs of the abdomen 83 of the human model 8 in a collision test. The human model 8 here includes a head 81, a chest 82, an abdomen 83, limbs 84, etc., and its physical properties such as size, weight and body density are close to those of a real person, including its dynamic behavior when it is hit, so it can be used in various behavior tests of vehicles and impact tests caused by traffic accidents. The present invention is a pressure sensor installed in the abdomen 83 of the human model 8, which is used to measure the pressure on the abdominal organs of the human model 8 placed in the vehicle during the traffic accident simulation process.

[0055] The abdominal organ pressure sensor of the human model 8 of the present invention comprises: an abdominal bladder 1, a pressure measuring unit 3 and a supporting frame 2, wherein an example of a Figure 1 The abdominal bladder 1 of the present invention includes a plurality of chambers, each chamber simulating the shape of one of the organs in the human abdomen 83. For example, if a chamber simulates the liver organ, the shape of the chamber is designed to be consistent with the shape of the human liver. In this way, the abdominal organs of a child sitting on a child safety seat can be more realistically simulated.

[0056] In order to facilitate assembly and positioning, the outer walls of two adjacent chambers are interconnected so that all the chambers together form a whole. The interconnection here can be adhesive connection, hot melt connection, or one-piece molding. Of course, it is not that the outer walls of two chambers are randomly connected to each other, but combined with simulated human body science, two chambers close to each other in the human abdominal organs are connected to each other. For example, the upper left part of the liver and the upper part of the stomach in the human abdominal organs are relatively close, so the chamber simulating the liver and the chamber simulating the stomach are connected to each other at a position close to each other, such as Figure 2 The reference numeral A indicates the position where the two are close to each other. For example, the lower part of the stomach and the pancreas are relatively close to each other in the abdominal organs of the human body, so the cavity simulating the stomach and the cavity simulating the pancreas are connected to each other at a position close to each other, such as Figure 2 The label B indicates the position where the two are close to each other; similarly, the cavity simulating the stomach and the cavity simulating the small intestine are connected to each other, such as Figure 2 The location where the two are connected is shown by the label C; the cavity simulating the small intestine and the cavity simulating the large intestine are connected to each other. Figure 2 The position where the two are connected to each other is shown in the label D. By connecting to each other in this way, all the chambers can be connected into a whole, and each chamber is filled with liquid.

[0057] The pressure measuring unit 3 of the present invention is mainly used to output an electrical signal of the pressure of the liquid in the chamber. In order to realize independent pressure measurement of each chamber, each chamber is provided with at least one pressure measuring unit 3, so that the pressure conditions of various abdominal organs can be measured more accurately.

[0058] The support frame 2 of the present invention has two functions. One is to support and fix the abdominal bladder 1 so that each chamber is in a set position that matches the position of the abdominal organs of the human body, thereby further ensuring the authenticity of the simulation and the accuracy of the measurement; the other is to be connected and fixed to the abdomen 83 of the human body model 8, so there is no need to set up a special abdominal block. The overall installation of the pressure sensor can be completed by simply fixing the support frame 2 to the original abdominal block of the human body model 8. Therefore, the installation is convenient and quick, and the overall weight is consistent with the weight of the abdomen 83 of the simulated human body, thereby further ensuring the accuracy of the measurement data.

[0059] Through the structural design of the supporting skeleton 2 and the abdominal sac 1 designed to simulate the abdominal organs of the human body, there is no need to set up a dedicated special abdominal block, nor will it be affected by the special abdominal block. Therefore, the abdominal sac 1 can respond to collision test measurements in more directions, including but not limited to the front, back, side, inclined, top, bottom and other directions, so as to comprehensively evaluate the abdominal organ damage of the vehicle occupants in various traffic accidents. Compared with the existing technology, the measurement is more comprehensive and the data is more accurate.

[0060] In some embodiments, each chamber includes a liquid chamber 101 and at least one gas chamber 102, the liquid chamber 101 is isolated from each other, the gas chamber 102 is filled with gas, and the liquid is filled in the liquid chamber 101. This structural design is different from existing similar products, and its advantage is that the weight of each chamber can be better adjusted, so that the weight of the entire abdominal bladder 1 will not exceed the weight of the abdomen 83 set by the applied human body model 8 itself. In comparison, the existing products have only one liquid storage cavity 101, and the existing problems include: on the one hand, it is difficult to match the weight of the abdomen 83, which is why the existing pressure sensor needs to be equipped with a special abdominal block, because the special abdominal block is needed to match the overall weight of the special abdominal block after the pressure sensor is installed to be consistent with the weight of the abdomen 83 set by the applied human body model 8 itself; on the other hand, even if the existing products are designed with multiple internal compartments simulating various abdominal organs, each of the internal compartments cannot be consistent with the weight of the corresponding organ of the simulated human body after being filled with liquid. Of course, it can achieve weight consistency by reducing the amount of injected liquid, but in this way, there is a problem of incompleteness in the compartment, and variable compression will occur during collision, resulting in a low measured pressure value; it is also possible to achieve consistency in weight after filling with liquid with the simulated weight by reducing the volume of the internal compartment, but in this way the volume of the cavity becomes smaller, which does not match the size of the simulated human abdominal organs, so it will also lead to inaccurate final measurement results.

[0061] Furthermore, the pressure measuring unit 3 can be arranged in both the liquid chamber 101 and the gas chamber 102; however, for economic considerations, it can be arranged only in the liquid chamber 101. In this case, in order to further improve the measurement accuracy, the gas chamber 102 is arranged on other cavity walls of the liquid chamber 101 other than the cavity wall surface that is squeezed in the collision test. For example, it can be arranged on the rear cavity wall surface of the liquid chamber 101 (i.e., the side closer to the back of the human model 8), or on the upper cavity wall surface, lower cavity wall surface or inner cavity wall side surface of the liquid chamber 101, in short, it is preferable not to affect the collision test.

[0062] Furthermore, in order to achieve that the weight of each chamber is consistent with the weight of the human abdominal organ it simulates, the capacity of the liquid chamber 101 and the capacity of the gas chamber 102 on each chamber are allocated and set according to the weight of the corresponding simulated human organ, so as to meet the weight of the chamber after the liquid chamber 101 is filled with liquid and the gas chamber 102 is filled with gas. The weight is consistent with the weight of the simulated human organ. For example, assuming that the simulated human liver weighs about 1350g and is 25.8cm×15.2cm×5.8cm in size, then the chamber simulating the liver is assumed to have a wall thickness of 0.3cm, and its capacity is about 2090cm 3 , and the filling liquid is vaseline, whose density is 0.84g / cm 3 If the gas chamber 102 is not provided and the entire chamber is filled with liquid, its weight is 1755.6 g, which exceeds the weight of the simulated human liver. Therefore, if the chamber is designed to include a liquid chamber 101 and a gas chamber 102, the capacity of the liquid chamber 101 is designed to be 1600 cm 3 , and the size of the gas chamber 102 is 490 cm 3 Thus, the weight of the liquid chamber 101 after being filled with liquid is 1344 g, and the weight of the gas chamber 102 after being filled with gas is about 6 g. In this way, the weight of the simulated liver chamber can be consistent with the weight of the human liver organ it simulates.

[0063] Specifically, a chamber has only one liquid chamber 101, but the number of gas chambers 102 can be set according to the design requirements of the chamber, and there can be only one gas chamber 102, or two or more gas chambers 102. For example, the volume of the liver chamber 11, the stomach chamber 12, and the pancreas chamber 13 is not too large, so only one gas chamber 102 can be set. Figure 3 The example shown is a horizontal cross-sectional view of the middle of the stomach chamber 12. It can be seen from the figure that the stomach chamber 12 of this example includes a liquid chamber 101 and a gas chamber 102; and since the small intestine chamber 15 and the large intestine chamber 16 are larger in volume, it can be considered to design the gas chamber 102 into multiple chambers, such as Figure 4 The example shown is a horizontal cross-sectional view of the middle part of the small intestinal chamber 15. It can be seen from the figure that the small intestinal chamber 15 of this example includes a liquid containing chamber 101 and two gas containing chambers 102. The two gas containing chambers 102 are arranged on the posterior cavity wall of the liquid containing chamber 101 of the small intestinal chamber 15, one on the left and one on the right.

[0064] Since the liquid chamber 101 and the gas chamber 102 are separated from each other, the liquid chamber 101 and the gas chamber 102 need to be provided with openings 4 respectively, that is, the liquid chamber 101 is provided with a liquid injection opening 4, such as Figure 2 The liquid injection opening 4 of the gastric cavity 12 shown is opened at the cardia position of the stomach; the opening 4 on the gas cavity 102 is an air nozzle 9, and each gas cavity 102 is provided with an air nozzle 9, which is a one-way air intake structure. Since the structure of the air nozzle 9 is an existing conventional structure, it will not be described in detail.

[0065] In some embodiments, the number of chambers of the abdominal bladder 1 can be designed according to actual measurement requirements. The chambers of the abdominal bladder 1 can include at least a liver chamber 11, a stomach chamber 12, a pancreas chamber 13, a spleen chamber, a kidney chamber, and an intestinal chamber, and the shapes and sizes of these chambers are consistent with the simulated abdominal organs of the human body. Figure 2 In the example shown, the abdominal bladder 1 includes a liver chamber 11, a stomach chamber 12, a pancreatic chamber 13, a gallbladder chamber 14, a small intestine chamber 15 and a large intestine chamber 16, a total of six chambers, wherein the upper left lower end surface of the liver chamber 11 is connected to the upper end surface of the stomach chamber 12, the middle part of the lower end surface of the liver chamber 11 is connected to the gallbladder chamber 14 through a pipe, the lower rear end surface of the stomach chamber 12 is connected to the front end surface of the pancreatic chamber 13, the pylorus of the stomach chamber 12 is connected to the head end of the small intestine chamber 15, and the tail end of the small intestine chamber 15 is connected to the head end of the large intestine chamber 16.

[0066] In some embodiments, two adjacent chambers can be connected, that is, the inner walls of the two chambers at the connecting position are provided with a through hole 6. In this design, only one chamber needs to be provided with an opening 4 for injecting liquid into the chamber. Figure 5 In the example shown, the six chambers on the abdominal bladder 1 of the example are all interconnected, wherein an opening 4 for liquid injection is provided at the cardia position of the gastric cavity 12, and the liquid injected through the opening 4 will gradually fill the six chambers, and after being filled, a sealing cover 5 is placed on the opening 4.

[0067] In other embodiments, the interior of each chamber on the abdominal bladder 1 can be independent of each other, that is, although the outer walls of two adjacent chambers are connected, their corresponding inner walls are sealed and not connected, so that the liquid in each chamber exists independently. In this design, each chamber is provided with an opening 4 for injecting liquid into the chamber. Figure 6 In the example shown, the six chambers on the abdominal bladder 1 of this example are all independent of each other, so each chamber is provided with an opening 4 for liquid injection, and each chamber needs to be injected with liquid six times. Although the structure and process are more complicated, since each chamber is independent of each other, the pressure measurement of each chamber will be more accurate.

[0068] The abdominal bladder 1 of the present invention can be made of polymer materials such as polypropylene, rubber or polycarbonate, which can maintain the set structural shape and is soft and tough; and the filled liquid can be water, emulsion or gel, such as components such as vaseline, silicone or paraffin oil, or a mixture of these components.

[0069] The pressure measuring unit 3 of the present invention is installed on each chamber, and the specific position is not limited, but the preferred choice is to be located on the other cavity wall surface other than the cavity wall surface that is squeezed in the collision test, because the test unit is made of rigid material, and being located on the force-bearing surface may affect the accuracy of the measurement result. Among them, when the interior of each chamber is independent of each other, since each chamber is provided with an opening 4 for injection, a sealing cover 5 needs to be provided at the opening 4, so the test unit of each chamber can be directly installed at the position of the sealing cover 5, such as Figure 6 The example shown. The measuring unit is electrically connected to the signal acquisition unit through a cable or a wireless module, and the signal acquisition unit can analyze the collected electrical signal and convert it into a pressure value. Of course, the pressure measuring unit 3 can also be set at other positions in the chamber, and one chamber can be provided with two or more pressure measuring units 3. The purpose of setting multiple pressure measuring units 3 is to analyze the time difference generated by the pressure signal of each pressure measuring unit 3 in the same chamber after the collision, so as to locate the application area of ​​the external pressure and the direction of pressure propagation.

[0070] In addition to the separate abdominal bladder 1, in some embodiments, a columnar bladder 10 may be included. The columnar bladder 10 is installed at the front end of the abdominal bladder 1; it may also be installed at the rear end of the abdominal bladder 1, that is, between the abdominal bladder 1 and the support frame 2. Figure 7 The columnar capsule 10 is also filled with liquid, and two micro strain gauges (not shown in the figure) are arranged on the columnar capsule 10. The two micro strain gauges can be located at the upper and lower ends of the columnar capsule 10, or at other relative positions of the columnar capsule 10.

[0071] The support skeleton 2 of the present invention can be of various structural styles, and can be made into a bracket that supports the abdominal bladder body 1, or made into a thick plate with a recessed position for embedding the rear part of the abdominal bladder body 1. Preferably, the support skeleton 2 includes a main rod 21 located in the middle to simulate the human spine and a connecting rod 22 extending horizontally from the main rod 21, and the rear end face of the abdominal bladder body 1 is connected to the connecting rod 22. More preferably, a plurality of connecting rods 22 are provided on the main rod 21, and a connecting plate 23 is provided at the end of each connecting rod 22, and the connecting plate 23 is connected to the rear end wall surface of at least one chamber of the abdominal bladder body 1. The support skeleton 2 can be supported by a lightweight metal material or hard plastic to have a certain supporting strength. Figure 1and Figure 8 In the example shown, the support frame 2 in this example includes a main rod 21 located in the middle to simulate the human spine and five connecting rods 22 extending horizontally from the main rod 21. A connecting plate 23 is provided at the end of each connecting rod 22. The shapes of the five connecting plates 23 are different. The shape of each connecting plate 23 is designed to match the shape of the rear end wall of the chamber to which it is connected. Figure 1 It can be seen that the five connecting plates 23 are respectively connected to the rear end cavity wall of the liver cavity 11, the stomach cavity 12, the pancreas cavity 13, the left large intestine cavity 16 and the right large intestine cavity 16. The connection between the connecting plate 23 and the rear end cavity wall of the cavity can be connected by adhesive connection; or it can be hung, that is, a hanging hole is set on the rear end cavity wall of the cavity, such as pasting or integrally forming a strip of the same material as the cavity on the rear end cavity wall of the cavity, and the hanging hole is set on the strip, and a hook is set on the matching surface of the connecting plate 23. The cavity and the connecting plate 23 can be connected by sleeve-fitting the hanging hole onto the hook. Of course, this connection method can even remove the connecting plate 23 structure and directly set the hook at the end of the connecting rod 22; it can also be bolted or welded. These two connection methods require a connecting seat plate to be set on the rear end cavity wall of the cavity, and then bolted or welded between the connecting seat plate and the connecting plate 23.

[0072] Furthermore, in order to ensure the accuracy of the connection between the support frame 2 and the abdominal bladder 1, a connection position may be provided on the rear end wall of at least one chamber of the abdominal bladder 1, and connected to the main rod 21 through the connection position, such as Figure 2 In the example shown, a connection position is provided on the rear end wall of the rectal part of the large intestine chamber 16, and a plug hole 7 is opened on the connection position, and the tail end of the main rod 21 is plugged into the plug hole 7. Figure 1 Before the connecting plate 23 is connected to each chamber, the tail end of the main rod 21 is inserted into the inserting hole 7, which can effectively prevent the connecting plate 23 of the supporting frame 2 from being offset or misaligned when connected to each chamber.

[0073] In addition to the connection plate 23 and the chamber, the connection plate 23 may be omitted and the abdominal bladder 1 may be directly connected via the connection rod 22. For example, a connection position is provided on the rear wall of at least one chamber of the abdominal bladder 1, and the connection position is connected with the connection rod 22 to achieve connection between each chamber and the connection rod 22. As described above, a hanging hole is provided on the rear wall of the chamber, a hook is provided at the end of the connection rod 22, and the chamber and the connection rod 22 are connected by fitting the hanging hole onto the hook.

[0074] The abdominal visceral pressure sensor of the present invention is installed by connecting and fixing the main rod 21 to the rear wall of the abdominal cavity 83 of the human body model 8. Figure 8In the example shown, an extension plate is extended from the rear end of the main rod 21, and a plurality of locking holes 24 are provided on the extension plate. Each locking hole 24 has a round hole 25, and a bolt can be passed through the round hole 25 and locked with the rear wall of the inner cavity of the abdomen 83 of the human body model 8, so as to fix the abdominal visceral pressure sensor 83 in the abdomen 83 of the human body model 8. In addition, other connection methods can also be used, such as embedding, clamping, plugging, bonding, etc.

[0075] The following is a detailed description of a specific embodiment.

[0076] Embodiment 1:

[0077] like Figure 1-Figure 3 , Figure 5 , Figure 6 and Figure 8 As shown, the abdominal organ pressure sensor of the human body model 8 of this embodiment includes: an abdominal bladder 1, a pressure measuring unit 3 and a supporting frame 2.

[0078] The abdominal bladder 1 includes six chambers simulating the shape of human abdominal organs, such as Figure 2 As shown, they are respectively a liver chamber 11, a stomach chamber 12, a pancreatic chamber 13, a gallbladder chamber 14, a small intestine chamber 15 and a large intestine chamber 16, and the lower end face of the upper left part of the liver chamber 11 is connected to the upper end face of the stomach chamber 12, the middle part of the lower end face of the liver chamber 11 is connected to the gallbladder chamber 14 through a pipeline, the lower rear end face of the stomach chamber 12 is connected to the front end face of the pancreatic chamber 13, the pylorus of the stomach chamber 12 is connected to the head end of the small intestine chamber 15, and the tail end of the small intestine chamber 15 is connected to the head end of the large intestine chamber 16, so that the six chambers together constitute a whole, and the abdominal bladder body 1 is made of rubber material. The interiors of the six chambers of this embodiment are also interconnected, that is, the inner walls of two adjacent chambers at the connected positions are provided with openings 6, so that liquid can flow between the chambers. Therefore, it is only necessary to open an opening 4 for liquid injection at the cardia position of the stomach chamber 12. The liquid injected through the opening 4 will gradually fill the six chambers. After filling, a sealing cover 5 is covered at the opening 4. The liquid used in this embodiment is a mixture of vaseline and silicone. In this embodiment, the six chambers on the abdominal bladder 1 are designed to simulate the shape of the abdominal organs of the human body. Therefore, the pressure value of each chamber measured can more truly reflect the damage of the child safety seat to the child's abdominal organs when a traffic accident occurs in reality.

[0079] Each chamber of this embodiment includes a liquid chamber 101 and a gas chamber 102. The gas chambers 102 of the six chambers are all located behind the liquid chamber 101. The liquid chamber 101 and the gas chamber 102 are separated from each other. Each gas chamber 102 is provided with a gas nozzle 9, through which gas can be filled into the gas chamber 102. The gas filled in this embodiment is air. The capacity of the liquid chamber 101 and the capacity of the gas chamber 102 on each chamber are allocated and set according to the weight of the simulated human organs corresponding to the chamber, so that after being filled with liquid and gas, the weight of each chamber is consistent with the weight of the child's abdominal organs it simulates.

[0080] The pressure measuring unit 3 of this embodiment is provided with at least one on each chamber, and is mainly used to output an electrical signal of the pressure of the liquid in each chamber. Figure 5 As shown, a pressure measuring unit 3 is provided on the liver chamber 11, and is located on the lower end wall of the liver chamber 11; a pressure measuring unit 3 is provided on the stomach chamber 12, and is located on the sealing cover 5 of the stomach chamber 12; a pressure measuring unit 3 is provided on the pancreatic chamber 13, and is located on the wall on the right side of the rear end of the pancreatic chamber 13; a pressure measuring unit 3 is provided on the gallbladder chamber 14, and is located on the rear end wall of the gallbladder chamber 14; two pressure measuring units 3 are provided on the small intestine chamber 15, and are located at two upper and lower positions in the middle of the rear end wall of the small intestine chamber 15; and two pressure measuring units 3 are provided on the large intestine chamber 16, and are located on the left and right sides of the rear end wall of the large intestine chamber 16.

[0081] The supporting frame 2 of this embodiment is as follows Figure 8 As shown, it includes a main rod 21 located in the middle to simulate the human spine and five connecting rods 22 extending horizontally from the main rod 21. The ends of the five connecting rods 22 are provided with connecting plates 23, and the rear end surface of the abdominal bladder 1 is connected to the five connecting plates 23. Specifically, as Figure 1 As shown, the five connecting plates 23 are respectively connected to the rear end cavity wall of the liver cavity 11, the stomach cavity 12, the pancreas cavity 13, the left large intestine cavity 16 and the right large intestine cavity 16, and the connection method can be adhesive connection. The front end surface shape of each connecting plate 23 is designed to match the shape of the rear end cavity wall of the cavity connected to it, that is, the rear end cavity wall of each cavity can be tightly fitted with the front end surface of the connecting plate 23. In addition, a connecting position is provided on the rear end cavity wall of the rectum part of the large intestine cavity 16, and a plug hole 7 is opened on the connecting position, and the tail end of the main rod 21 is plugged into the plug hole 7. An extension plate 26 is extended from the rear end of the main rod 21, and a plurality of locking hole members 24 are provided on the extension plate 26. Each locking hole member 24 has a round hole 25, and a bolt can be passed through the round hole 25 and locked with the rear wall of the inner cavity of the abdomen 83 of the human body model 8, so as to fix the abdominal visceral pressure sensor 83 in the abdomen 83 of the human body model 8. Fig. 9 The support frame 2 is used to support and fix the abdominal bladder 1, so that each chamber is in a corresponding set position that conforms to the position of the child's abdominal organs, thereby further ensuring the authenticity of the simulation and the accuracy of the measurement.

[0082] This embodiment uses the support frame 2 to connect and fix with the abdomen 83 of the human model 8, so there is no need to set up a special abdomen block. The pressure sensor can be installed as a whole only by fixing the support frame 2 to the original abdomen block of the human model 8. Therefore, the installation is convenient and quick, and the overall weight is consistent with the weight of the simulated abdomen 83 of the human body, thereby further ensuring the accuracy of the measurement data. At the same time, since it will not be affected by the special abdomen block, the abdomen bladder 1 of the present invention can respond to collision test measurements in more directions, including but not limited to the front, back, side, inclined, top, bottom and other directions, so it can comprehensively evaluate the damage to the abdominal organs of children in child safety seats in various traffic accidents.

[0083] Embodiment 2:

[0084] This embodiment, based on the above-mentioned embodiment 1, further includes a double columnar capsule for simulating the soft tissue of the child's abdomen, namely, two columnar capsules 10, which are placed on the left and right sides of the dummy's abdomen, located at the front end of the abdominal capsule 1. The columnar capsule 10 is soft in texture and has high toughness, and can truly simulate the real stiffness of the soft tissue of the abdomen of children of different age groups from 0 to 10 years old, and can withstand the greater impact force suffered by the vehicle in the collision test scenario without breaking. The position where the columnar capsule 10 is placed is exactly the position where the safety belt corresponds to the abdomen after the child is seated in the child safety seat. At the position of the force, the columnar capsule 10 is also filled with the liquid mentioned above, and the liquid acts as a conducting medium directly on the dual micro strain gauges (i.e., the pressure measuring unit 3) placed in the columnar capsule 10. That is to say, each columnar capsule 10 is provided with two micro strain gauges, so that the two micro strain gauges have a very high acquisition frequency, and can simultaneously acquire the collision frequency points that flash in an instant during the dynamic test, and then convert the two force signals into two groups of analog signals, and finally obtain an analog signal with a precise value through the comparison calculation of the two groups of signals by the operation comparison chip. It is worth mentioning here that the dual columnar capsule realizes the equivalent of four sensors being placed in the limited space at the abdomen of the child dummy for acquisition, so it can collect and capture in a timely and accurate manner during the dynamic test of automobile collision, unlike the existing cylindrical airbags. When the vehicle speed is high, the collision frequency points that flash in an instant are difficult to be collected and captured in a timely and accurate manner, so there are large acquisition error values ​​and failure to collect collision points, which are more common technical difficulties in the current industry. Moreover, the columnar bladder 10 cooperates with the abdominal bladder 1 to obtain a more comprehensive abdominal pressure measurement for children of different age groups from 0 to 10 years old.

[0085] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0086] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A sensor for child dummies used in automobile collision tests, used to measure the pressure of the restraint system on the abdominal organs of the human model in the collision test, characterized in that: include: An abdominal bladder, the abdominal bladder comprising a plurality of chambers, each chamber simulating the shape of an organ in the human abdomen, the outer walls of two adjacent chambers being connected to each other so that all the chambers together form a whole, and each chamber being filled with liquid; A pressure measuring unit, used to output an electrical signal of the pressure of the liquid in each of the chambers, and each of the chambers is provided with at least one pressure measuring unit; A support frame is used to support and fix the abdominal bladder so that each of the chambers is in a set position that matches the position of the abdominal organs of the human body; it is also used to be connected and fixed to the abdomen of the mannequin; the support frame includes a main rod located in the middle to simulate the human spine and a connecting rod extending horizontally from the main rod, and the rear end surface of the abdominal bladder is connected to the connecting rod; the main rod is connected and fixed to the rear wall of the abdominal cavity of the mannequin; Each of the chambers includes a liquid containing chamber and at least one gas containing chamber, the liquid containing chamber is isolated from each other, the gas containing chamber is filled with gas, and the liquid is filled in the liquid containing chamber; the capacity size of the liquid containing chamber and the capacity size of the gas containing chamber on each of the chambers are allocated and set according to the weight of the simulated human organ corresponding to the chamber; the gas containing chamber is set on the other cavity wall surface of the liquid containing chamber other than the cavity wall surface that is squeezed in the collision test.

2. The child dummy sensor for automobile collision test according to claim 1, characterized in that: The chambers include at least a liver chamber, a stomach chamber, a pancreatic chamber, a spleen chamber, a kidney chamber and an intestinal chamber. The shapes and sizes of the liver chamber, the stomach chamber, the pancreatic chamber, the spleen chamber, the kidney chamber or the intestinal chamber are consistent with the simulated abdominal organs of the human body.

3. The child dummy sensor for automobile collision test according to claim 1, characterized in that: A through opening is provided at the connection of the inner walls of two adjacent chambers, and one of the chambers is provided with an opening for injecting the liquid into the chamber; or The inner walls of two adjacent chambers are sealed and not connected, and each chamber is provided with an opening for injecting the liquid into the chamber.

4. The child dummy sensor for automobile collision test according to any one of claims 1 to 3, characterized in that: It also includes a columnar sac, which is installed at the front end or the rear end of the abdominal sac, is filled with the liquid, and is provided with two micro strain gauges.

5. The child dummy sensor for automobile collision test according to claim 1, characterized in that: A connecting plate is provided at the end of the connecting rod, and the connecting plate is cooperatively connected to the rear end cavity wall surface of at least one chamber of the abdominal bladder; and / or a connecting position is provided at the rear end cavity wall surface of at least one chamber of the abdominal bladder, and the connecting position is cooperatively connected to the connecting rod or the main rod.

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