阅读说明：本技术 一种动态响应校准装置 (Dynamic response calibrating device ) 是由 赵敬月 尹霖麒 蔡波 高雄 丁珺 徐坚杰 高节 陈杰 于 2020-05-22 设计创作，主要内容包括：本发明涉及一种动态响应校准装置。该动态响应校准装置包括底座；第一支架,包括相对设置在底座上的两根支柱,及连接两根支柱顶端的横梁,腹压传感器设置在横梁上；第二支架,包括U型支架及连接U型支架两顶端的皮带,U型支架上设有穿孔,第二支架所在平面与第一支架所在平面相互垂直,皮带的底面向下压在腹压传感器的表面；砝码,包括砝码本体及砝码轴,砝码轴穿设于U型支架的穿孔中；升降装置,设置在底座上,升降装置能向上托起砝码,以使砝码能在托起第二支架、不施力于第二支架和吊挂在第二支架的三种状态之间切换。本发明提出了一种动态响应校准装置,适用于腹压传感器,校正准确。(The invention relates to a dynamic response calibration device. The dynamic response calibration device includes a base; the first support comprises two pillars oppositely arranged on the base and a cross beam connected with the top ends of the two pillars, and the abdominal pressure sensor is arranged on the cross beam; the second support comprises a U-shaped support and a belt connected with the two top ends of the U-shaped support, a through hole is formed in the U-shaped support, the plane where the second support is located is perpendicular to the plane where the first support is located, and the bottom surface of the belt is pressed downwards on the surface of the abdominal pressure sensor; the weight comprises a weight body and a weight shaft, and the weight shaft is arranged in the through hole of the U-shaped bracket in a penetrating way; and the lifting device is arranged on the base and can upwards support the weight so that the weight can be switched among three states of supporting the second support, not applying force to the second support and hanging the weight on the second support. The invention provides a dynamic response calibration device which is suitable for an abdominal pressure sensor and accurate in calibration.)

1. A dynamic response calibration device, suitable for an abdominal pressure sensor, comprises,

a base;

the first support comprises two pillars which are oppositely arranged on the base and a cross beam which is connected with the top ends of the two pillars, and the abdominal pressure sensor is arranged on the cross beam;

the second support comprises a U-shaped support and a belt connected with the two top ends of the U-shaped support, a through hole is formed in the U-shaped support, the plane where the second support is located is perpendicular to the plane where the first support is located, and the bottom surface of the belt is pressed downwards on the surface of the abdominal pressure sensor;

the weight comprises a weight body and a weight shaft, and the weight shaft is arranged in the through hole of the U-shaped support in a penetrating way;

the lifting device is arranged on the base and can upwards support the weight, so that the weight can be switched among three states of supporting the second support, not applying force to the second support and hanging the second support.

2. The dynamic response calibration device of claim 1, further comprising a dial indicator and a gimbal, wherein one end of the gimbal is fixed on the first support, the other end of the gimbal is fixed with the dial indicator, and a head of the dial indicator presses down on a top surface of the belt contacting the abdominal pressure sensor.

3. The dynamic response calibration device of claim 1, wherein both ends of the strap are fixedly attached to both top ends of the U-shaped bracket by fixing pins, respectively.

4. The dynamic response calibration device of claim 3, wherein the bottom of the two ends of the bottom beam of the U-shaped bracket is provided with a copper sleeve, the base is provided with two guide posts, and the tops of the guide posts respectively extend into the copper sleeve and are in clearance fit with the copper sleeve.

5. The dynamic response calibration device of claim 4, wherein the bottom beam of the U-shaped bracket is provided with a through hole, two sides of the weight body extend upwards to form two opposite bosses, the weight shaft is connected with the two bosses, and the weight shaft is arranged in the through hole of the bottom beam in a penetrating manner.

6. The dynamic response calibration device of claim 5, wherein the two bosses are spaced apart wider than the width of the sill such that the sill falls between the two bosses.

7. The dynamic response calibration device of claim 5, wherein the perforation is located on a center of gravity of the second bracket.

8. The dynamic response calibration device of claim 1, wherein the lifting device comprises a lifting screw, a nut, a handle and a saddle, the saddle is disposed on the top of the lifting screw, the nut is disposed on the lifting screw, the handle is fixed to the nut, the handle is rotated, and the nut drives the lifting screw to rotate so as to raise or lower the saddle.

9. The dynamic response calibration device of claim 8, wherein a center hole is formed in the center of the bottom of the weight, and the top of the lifting screw rod penetrates through the center of the support table and extends upwards into the center hole, and the lifting screw rod and the support table are matched and fixed.

Technical Field

The invention relates to the technical field of testing of vehicle sensors, in particular to a dynamic response calibration device suitable for an abdominal pressure sensor.

Background

In the crash tests of trolleys and real vehicles in the field of passive safety, the function of a safety belt in a child restraint system is of great importance for judging the injury of a child human body. Peak belt force, mechanical work to maximum compression force and abdominal wall penetration are the best wound discrimination factors. Based on the in vitro liver test and the whole body PMHS test, it was found that pressure-related variables such as vascular pressure velocity, maximum vascular pressure and its products are associated with the risk of liver injury, most of these indices can only be transmitted using a dummy fitted with a specific instrument or sensor. For example, harness forces may be measured, but special instrumentation is required to separate the forces applied to the pelvis and chest from the forces applied to the soft abdomen. In the past, anterior superior iliac spine force sensors were used to assess pelvic load, but deriving abdominal load was difficult because the strap and iliac load may have different directions. Furthermore, this method does not allow assessment of the abdominal load of the oblique bands under the ribs. Various methods of mounting abdominal instruments, sensors in the dummy have been proposed to ameliorate this problem. Therefore, an IFSTTAR double sensor for abdominal pressure developed by Q series child dummy is introduced.

The united nations agreement on technical solutions by unification article 129 (ECE R129): with respect to the unified regulations for a robust child restraint system approved for use on motor vehicles, dual abdominal pressure sensors (APTS) are installed in both the Q series child dummies Q1.5\ Q3\ Q6 and Q10 for frontal collisions. With the widespread use of abdominal pressure sensors, the confirmation of the calibration method and the development of the tracing of the quantity value are urgent.

At present, an IFSTTAR is used as an abdominal pressure double sensor developed by a Q dummy, the quantity value tracing and the detection of performance working conditions are required to be sent back to a foreign original factory, and the conditions of long test period and high cost exist. And no calibration equipment and calibration mode aiming at the abdominal pressure sensor are provided in China.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a dynamic response calibration device which is suitable for an abdominal pressure sensor, is accurate in calibration and can meet the measurement system requirements of the abdominal pressure sensor on the source tracing and the period checking.

In particular, the invention provides a dynamic response calibration device, which is suitable for an abdominal pressure sensor and comprises,

a base;

the first support comprises two pillars which are oppositely arranged on the base and a cross beam which is connected with the top ends of the two pillars, and the abdominal pressure sensor is arranged on the cross beam;

the second support comprises a U-shaped support and a belt connected with the two top ends of the U-shaped support, a through hole is formed in the U-shaped support, the plane where the second support is located is perpendicular to the plane where the first support is located, and the bottom surface of the belt is pressed downwards on the surface of the abdominal pressure sensor;

the weight comprises a weight body and a weight shaft, and the weight shaft is arranged in the through hole of the U-shaped support in a penetrating way;

the lifting device is arranged on the base and can upwards support the weight, so that the weight can be switched among three states of supporting the second support, not applying force to the second support and hanging the second support.

According to one embodiment of the invention, the abdominal pressure sensor further comprises a dial indicator and a universal bracket, wherein one end of the universal bracket is fixed on the first bracket, the other end of the universal bracket is fixed with the dial indicator, and the head of the dial indicator is pressed downwards on the top surface of the belt contacting the abdominal pressure sensor.

According to one embodiment of the invention, two ends of the belt are fixedly connected to two top ends of the U-shaped bracket respectively through fixing pins.

According to one embodiment of the invention, the bottom parts of two ends of the bottom beam of the U-shaped support are provided with copper sleeves, the base is provided with two guide pillars, and the tops of the guide pillars respectively extend into the copper sleeves and are in clearance fit with the copper sleeves.

According to one embodiment of the invention, a through hole is formed in the bottom beam of the U-shaped support, two opposite bosses are formed by upwards extending two sides of the weight body, the weight shaft is connected with the two bosses, and the weight shaft penetrates through the through hole of the bottom beam.

According to one embodiment of the invention, the distance between the two bosses is wider than the width of the base beam, so that the base beam falls between the two bosses.

According to one embodiment of the invention, the perforation is located on the center of gravity of the second stent.

According to one embodiment of the invention, the lifting device comprises a lifting screw rod, a nut, a handle and a support platform, the support platform is arranged at the top of the lifting screw rod, the nut is arranged on the lifting screw rod, the handle is matched and fixed with the nut, the handle is rotated, and the nut drives the lifting screw rod to rotate so as to enable the support platform to ascend or descend.

According to one embodiment of the invention, a center hole is formed in the center of the bottom of the weight, and the top of the lifting screw rod penetrates through the center of the support table and extends upwards into the center hole to be matched and fixed.

The dynamic response calibration device provided by the invention is used for detecting the working condition of the abdominal pressure sensor and verifying the accuracy of the sensitivity parameter of the abdominal pressure sensor, and a complete calibration system of the abdominal pressure sensor is formed by combining the sensitivity calibration device of the abdominal pressure sensor, so that the measurement traceability of the abdominal pressure sensor and the measurement system requirement for checking the abdominal pressure sensor in the period are completed.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention.

In the drawings:

fig. 1 is a schematic structural diagram of a dynamic response calibration apparatus according to an embodiment of the present invention.

FIG. 2 illustrates a top view of a dynamic response calibration apparatus in accordance with one embodiment of the present invention.

Fig. 3 is a cross-sectional view along AA of fig. 2.

Fig. 4 is a cross-sectional view taken along the direction BB of fig. 3.

FIG. 5 is a schematic diagram of another embodiment of a dynamic response calibration apparatus according to the present invention.

Wherein the figures include the following reference numerals:

dynamic response calibration device 100 base 101

First bracket 102 and second bracket 103

Weight 104 lifting device 105

Column 106 beam 107

Abdominal pressure sensor 108U-shaped bracket 109

Belt 110 perforations 111

Weight shaft 113 of weight body 112

Universal bracket 115 of dial indicator 114

Fixed pin 116 bottom beam 117

Guide post 118 boss 119

Lifting screw rod 120 nut 121

Handle 122 pallet 123

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.

Fig. 1 is a schematic structural diagram of a dynamic response calibration apparatus according to an embodiment of the present invention. FIG. 2 illustrates a top view of a dynamic response calibration apparatus in accordance with one embodiment of the present invention. Fig. 3 is a cross-sectional view along AA of fig. 2. Fig. 4 is a cross-sectional view taken along the direction BB of fig. 3. FIG. 5 is a schematic diagram of another embodiment of a dynamic response calibration apparatus according to the present invention. As shown in the figure, a dynamic response calibration device 100 suitable for an abdominal pressure sensor 108 mainly comprises a base 101, a first support 102, a second support 103, a weight 104 and a lifting device 105.

The first bracket 102 includes two pillars 106 oppositely disposed on the base 101, and a cross member 107 connecting top ends of the two pillars 106. The first bracket 102 including the column 106 and the beam 107 is fixed to the base 101, and the abdominal pressure sensor 108 is fixed to the beam 107.

The second bracket 103 includes a U-shaped bracket 109 and a belt 110 connecting two top ends of the U-shaped bracket 109. The U-shaped bracket 109 is provided with a through hole 111. The plane of the second support 103 is perpendicular to the plane of the first support 102. The bottom surface of the belt 110 presses down on the surface of the abdominal pressure sensor 108. As will be readily appreciated, the second support 103 is suspended in mid-air and its top is pressed against the abdominal pressure sensor 108 by a strap 110. The U-shaped bracket 109 may be made of a light alloy material. The belt 110 is mainly used for hanging and bearing and is a wearing part.

The weight 104 includes a weight body 112 and a weight shaft 113. The weight shaft 113 is inserted into the through hole 111 of the U-shaped bracket 109.

The lifting device 105 is disposed on the base 101. The lifting device 105 can lift the weight 104 upward. The weight 104 rises and the weight shaft 113 can lift the second bracket 103 upwards through the through hole 111. The weight 104 is lowered and the weight of the entire weight 104 can be applied to the second support 103, thereby giving a greater pressure to the abdominal pressure sensor 108. When the weight shaft 113 does not touch the upper edge and the lower edge of the through hole 111, the weight 104 does not exert a force on the second bracket 103. As can be seen, the lifting device 105 can switch the weight 104 between three states of lifting the second holder 103, not applying a force to the second holder 103, and suspending the weight on the second holder 103.

Preferably, the dynamic response calibration apparatus 100 further includes a dial indicator 114 and a gimbal 115. Gimbal 115 is fixed at one end to first support 102 and may be generally fixed on both sides of beam 107. A dial indicator 114 is fixed to the other end of the gimbal 115. The gimbal 115 is movable in the X, Y, and Z directions to move the head of the dial gauge 114 to a set position. The set position is where the belt 110 contacts the abdominal pressure sensor 108. The dial indicator 114 is moved to the set position such that the head of the dial indicator 114 presses down on the belt 110. When the belt 110 is pressed down to deform the abdominal pressure sensor 108, the dial indicator 114 can measure the position change of the deformation of the abdominal pressure sensor 108.

Preferably, the two ends of the belt 110 are fixedly connected to the two top ends of the U-shaped bracket 109 by fixing pins 116, respectively.

Preferably, the U-shaped bracket 109 has a bottom beam 117, and copper sleeves are provided at the bottoms of both ends of the bottom beam 117. Two guide posts 118 are arranged on the base 101, and the tops of the guide posts 118 respectively extend into the copper sleeves and are in clearance fit with the copper sleeves. The guide post 118 and the copper bush are not separated from each other in cooperation, and the purpose is to ensure that the second bracket 103 is prevented from deflecting in the up-and-down moving process, so that the abdominal pressure sensor 108 is driven to roll and fall off or the reading accuracy of the dial indicator 114 is influenced.

Preferably, the through hole 111 is provided on the bottom beam 117 of the U-shaped bracket 109. Two opposite bosses 119 are formed by upwards extending two sides of the weight body 112, the weight shaft 113 is connected with the two bosses 119, and the weight shaft 113 is arranged in the through hole 111 of the bottom beam 117 in a penetrating way. The through hole 111 in the bottom beam 117 can be understood as a kidney-shaped groove, the weight 104 goes up and down, and the weight shaft 113 contacts the upper edge and the lower edge of the kidney-shaped groove.

Preferably, the spacing between the two bosses 119 is wider than the width of the sill 117 so that the sill 117 falls between the two bosses 119.

Preferably, the through hole 111 of the bottom beam 117 is located at the center of gravity of the second bracket 103 to maintain the stability of the second bracket 103 during the up and down movement.

Preferably, the lifting device 105 mainly comprises a lifting screw 120, a nut 121, a handle 122 and a saddle 123. The saddle 123 is disposed on the top of the elevation screw 120. The nut 121 is provided on the elevation screw bar 120. The handle 122 is fixed to the nut 121. The handle 122 is rotated, and the nut 121 drives the lifting screw rod 120 to rotate, so that the saddle 123 is lifted or lowered. The saddle 123 moves the weight 104 up or down.

Preferably, the center of the bottom of the weight 104 is provided with a center hole. The top of the lifting screw rod 120 passes through the center of the saddle 123 and extends upwards into the center hole, and the two are matched and fixed. During the ascending and descending processes, the weight 104 is stabilized.

The following describes a specific operation process of a dynamic response calibration apparatus 100 according to the present invention with reference to all the drawings.

The dynamic response calibration device 100 is used for detecting the change value of the radial dimension of the abdominal pressure sensor 108 when the abdominal pressure sensor is subjected to a radial force from top to bottom, namely, the up-down displacement. And this variation should fall within the range required by the standard.

By way of example, the total weight of the U-shaped bracket 109 with the two copper sleeves mounted on its bottom beam 117 and the two fixing pins 116 for fixing the belt 110 is 2KG + -0.02 KG. The total weight of the weight 104 and the weight shaft 113 is 25.516KG + -0.02 KG. Conventionally, there are three diameter specifications for the abdominal pressure sensor 108 under test: 30. 40 and 50.

When the detection is started, the rotating handle 122 drives the nut 121 to rotate, so that the lifting screw rod 120 ascends, and the tray 123 at the front end of the lifting screw rod 120 holds the weight 104 and ascends together. When the weight shaft 113 rises and touches the through hole 111 of the U-shaped bracket 109, the U-shaped bracket 109 is driven to rise together, so that enough space is left between the cross beam 107 and the belt 110 to conveniently install the abdominal pressure sensor 108.

Then, the handle 122 is rotated to lower the lifting screw 120, and the weight 104 is supported by the saddle 123 and lowered along with the gravity. Similarly, the U-shaped bracket 109 is supported by the weight shaft 113 and also descends along with the weight shaft. When the belt 110 is pressed by being blocked by the abdominal pressure sensor 108, the downward movement of the U-shaped bracket 109 is prevented. The elevating screw rod 120 continues to move downwards to make the weight shaft 113 not to touch the upper edge and the lower edge of the through hole 111 of the U-shaped bracket 109, and at this time, the U-shaped bracket 109 is not subjected to the upward supporting force and the downward gravity which are applied to the U-shaped bracket by the weight 104. That is, the abdominal pressure sensor 108 only bears the weight (2KG ± 0.02KG) of the second bracket 103, the abdominal pressure sensor 108 is crushed to generate radial deformation, and the dial indicator 114 reads a vertical position value H1 after the head of the dial indicator is stabilized to be deformed in the downward direction.

Subsequently, the lifting screw 120 continues to descend, and the weight 104 follows the descending. When the weight shaft 113 touches the lower edge of the through hole 111 of the U-shaped bracket 109, the U-shaped bracket 109 is pulled to move downwards together, the abdominal pressure sensor 108 is pressed to be flatter and is flattened to be enough to bear the weight of the additional weight 104 to be balanced, the lifting screw rod 120 continuously descends the front end saddle 123 of the lifting screw rod to leave the lower plane of the weight 104 to generate no supporting force to the weight 104, and at the moment, the force borne by the abdominal pressure sensor 108 is the weight of the second bracket 103 plus the weight of the weight 104: namely 27.516 KG.

After stabilization, the dial indicator 114, which follows the downward direction, reads a position value H2 in the upward and downward direction.

Finally, the difference obtained from H2-H1 is the vertical displacement D of the belt 110. Comparing the value D with the range defined by the standard can determine whether the measured abdominal pressure sensor 108 meets the requirements.

The dynamic response calibration device provided by the invention has the following characteristics:

1. the structure is compact, the stability is good, and the moving is easy;

2. the calibration method can be suitable for calibrating abdominal pressure sensors with various specifications and sizes;

3. when the weight is not used, the weight is born by the lifting device, and the second support is not influenced.

4. The step-by-step loading and step-by-step unloading of the weight can be carried out in the same descending process and ascending process, respectively.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.