Collision acceleration gradient monitoring device

Abstract

The present invention relates to a collision acceleration gradient monitoring device, which includes a collision sensor, a display unit, and an energy supply unit; the collision sensor includes a plurality of conductive carbon rods arranged in parallel, metal parts arranged at both ends of the conductive carbon rods along the length direction to form a parallel connection of a plurality of conductive carbon rods, and a mass block arranged in an insulating manner in the middle of each conductive carbon rod along the length direction; the metal parts at both ends are connected to the energy supply unit and the display unit through wires; the length direction of the conductive carbon rods is perpendicular to the collision direction, and the masses of the plurality of mass blocks are sequentially decreased along the collision direction or perpendicular to the collision direction. When being collided, the conductive carbon rods provided with different mass blocks present different broken states to obtain different current values; it is beneficial to obtain the level of the acceleration of the colliding body caused by the collision, so as to obtain the corresponding severity of the collision accident, and it has low cost, good durability, high reliability, is convenient for maintenance and replacement, and is suitable for large-area and batch installation and use.

Description

Technical Field

[0001] The present invention relates to a monitoring device, and in particular to a collision acceleration gradient monitoring device. Background Art

[0002] To ensure the safety of vehicle driving on both sides of the road, flexible, rigid or semi-rigid safety guardrails are often installed. When a vehicle deviates from the normal route and collides with the roadside safety guardrail, the installation of the safety guardrail helps prevent serious safety accidents such as the vehicle running off the road edge and falling. To detect the time and location of a collision accident in a timely manner, a certain number of collision accident monitoring and warning devices can be installed along the roadside safety guardrail in accident-prone sections and at the places where mountain road slopes are prone to rockfalls and landslides impacting the roadside safety guardrail.

[0003] Existing road traffic collision accident monitoring devices mainly use video surveillance cameras installed at intersections to continuously capture images for 24 hours and the method of manual monitoring of the screen to observe the traffic conditions within the viewing angle of the camera lens and identify accidents. They can monitor in an intuitive, credible and full-time coverage manner. However, the disadvantages are high cost, limited number of camera installations, limited coverage of road sections, difficulty in ensuring real-time manual acquisition of accident dynamics at all monitoring points, and a large amount of data obtained by the camera, which poses high requirements for the background data storage, retrieval and processing equipment. In addition, existing mature products such as marketized encapsulated high-precision accelerometers for collision acceleration detection and warning are relatively expensive, and the supporting data acquisition board cards are also expensive. Moreover, supporting facilities such as a front-end industrial computer, a precision power supply and a special data cable need to be configured. There is still a lack of low-cost, durable and reliable collision acceleration gradient monitoring products in the market to meet the monitoring requirements with relatively low accuracy (such as only needing to know the acceleration level range of the collision object caused by the collision), large layout density and limited funds.

[0004] Based on the above problems, the present invention provides a collision acceleration gradient monitoring device. This collision acceleration gradient monitoring device is conducive to obtaining the acceleration level of the collision object caused by the collision to obtain the corresponding severity of the collision accident, and has low cost, good durability, high reliability, is convenient for maintenance and replacement, and is suitable for large-area and batch installation and use. Summary of the Invention

[0005] In view of this, the present invention provides a collision acceleration gradient monitoring device, which is conducive to obtaining the acceleration level of the collision object caused by the collision to obtain the corresponding severity of the collision accident, and has low cost, good durability, high reliability, is convenient for maintenance and replacement, and is suitable for large-area and batch installation and use.

[0006] The impact acceleration gradient monitoring device of the present invention includes an impact sensor, a display unit, and an energy supply unit; the impact sensor, the display unit, and the energy supply unit are connected by wires to form a loop circuit; the energy supply unit is a regulated power supply, and the display unit is a galvanometer. The display unit and the energy supply unit can be separately arranged or integrally arranged; the impact sensor includes a plurality of conductive carbon rods arranged in parallel, metal parts arranged at both ends of the conductive carbon rods along the length direction to form a parallel connection of the plurality of conductive carbon rods, and a mass block arranged in an insulating manner in the middle of each conductive carbon rod along the length direction; the conductive carbon rods are brittle conductive carbon rods, and the conductive carbon rods can be selected from conductive carbon rods that meet the "Conductive Carbon Rods for Carbon Arc Gouging GB 12174-1990" or similar products. The selection of conductive carbon rods belongs to the prior art and will not be elaborated here; the metal parts at both ends are connected to the energy supply unit and the display unit through wires; the length direction of the conductive carbon rods is perpendicular to the impact direction, and the masses of the plurality of mass blocks decrease sequentially along the impact direction or perpendicular to the impact direction. When impacted, the conductive carbon rods with different mass blocks exhibit different breaking states to obtain different current values; the arrangement direction of the plurality of conductive carbon rods is the same as the arrangement direction of the roadside guardrail. The impact direction can be parallel to the plane formed by the plurality of conductive carbon rods or parallel to the plane formed by the plurality of conductive carbon rods. In either case, the impact direction needs to be perpendicular to the length direction of the conductive carbon rods; when a collision occurs, the sides of the plurality of conductive carbon rods of the impact sensor are subjected to the impact force from the collision object. Under the different impact acceleration inertial forces generated by the different mass blocks on the corresponding conductive carbon rods, the middle parts of the conductive carbon rods are fractured to different degrees, causing the resistance value of the impact sensor to change. When the voltage is constant, different current values are displayed through the display unit such as a galvanometer. At this time, the current value can be read directly or remotely monitored by using existing wired or wireless transmission means to obtain the level of the acceleration of the collision object caused by the collision, and based on this, the severity of the corresponding collision accident can be obtained and emergency measures can be taken in a timely manner; a corresponding sound, light, and electrical device can also be matched to achieve a warning function, improving the acquisition efficiency; and it has low cost, good durability, high reliability, is convenient for maintenance and replacement, and is suitable for large-area and batch installation and use.

[0007] Further, the lengths of the plurality of mass blocks along the length direction of the conductive carbon rods are equal, and the cross-sectional areas decrease sequentially along the impact direction or perpendicular to the impact direction; on the premise that the impact direction is perpendicular to the length direction of the conductive carbon rods, the lengths of the plurality of mass blocks along the length direction of the conductive carbon rods are equal, and the cross-sectional areas of the mass blocks gradually decrease sequentially along the impact direction or perpendicular to the impact direction, which is conducive to generating different impact acceleration inertial forces on the conductive carbon rods and obtaining the level of the acceleration of the collision object caused by the collision and the corresponding severity of the collision accident;

[0008] Further, both end faces of the plurality of mass blocks along the length direction of the conductive carbon rod are flush; this is beneficial for avoiding the inability to accurately obtain the acceleration level of the collision body caused by the collision due to different distances from the collision point when the plurality of mass blocks are arranged at different positions on the corresponding conductive carbon rod;

[0009] Further, the mass block is provided with a mounting hole for sleeving the mass block on the conductive carbon rod, and the fixed connection between the two is achieved by filling an insulating material between the conductive carbon rod and the hole wall of the mass block; this is beneficial for the insulating fixed installation of the mass block on the corresponding conductive carbon rod; preferably, the space between the conductive carbon rod and the hole wall of the mass block is filled with an insulating material such as insulating glue, which is beneficial for ensuring that the fixed connection lengths of the conductive carbon rod and the mass block are the same;

[0010] Further, the mass block is of a cylindrical or regular polygonal columnar structure; preferably, it is a cylindrical mass block with the same height, and on the premise that the collision direction is perpendicular to the length direction of the conductive carbon rod, the diameter of the cylindrical mass block gradually decreases in sequence along the collision direction or perpendicular to the collision direction;

[0011] Further, the lengths and cross-sectional areas of the plurality of conductive carbon rods are the same; this is beneficial for ensuring that the resistance values of each conductive carbon rod are the same and avoiding interference with the monitoring results due to different resistance values of the conductive carbon rods;

[0012] Further, a groove for accommodating the end of the conductive carbon rod is provided at the connection of the metal part corresponding to the conductive carbon rod, and a fixed connection between the end of the conductive carbon rod and the metal part is formed through a conductive material; the conductive material such as conductive glue added with conductive filler, and the selection of conductive glue belongs to the prior art and will not be elaborated here; this is beneficial for forming a stable arrangement of a plurality of conductive carbon rods between two metal parts such as strip-shaped metal blocks, which is beneficial for the stable assembly of the collision sensor;

[0013] Further, the number of the conductive carbon rods is determined according to the number of levels required for the collision acceleration level warning;

[0014] Further, the mass of the mass block is obtained by back-calculation from the number of acceleration levels to be tested and the force value required to break the conductive carbon rod in the middle of the conductive carbon rod; for example, the conductive carbon rod can be regarded as an equal-section beam fixed at both ends and subjected to a transverse force, its material flexural strength is f, the section bending modulus of the conductive carbon rod is W, the length of the conductive carbon rod between the two metal parts is l, the mass of the mass block is m, and the linear distributed mass of the conductive carbon rod itself is m c , assuming that when the conductive carbon rod and its fixed ends are integrally excited by an acceleration a, the middle of the conductive carbon rod along the length direction is just broken, then according to the principles of material mechanics, the following mechanical relationship can be established:

[0015] (mal / 8 + m c al 2 / 24) / W = f(1)

[0016] Using formula (1), after determining the acceleration gradient value a and the relevant physical and mechanical parameters f, W, l, and mc of the conductive carbon rod, the mass m of the mass block can be obtained by back-solving;

[0017] Furthermore, the material of the mass block is stainless steel or copper; the metal part is a strip-shaped metal block and its material is stainless steel or copper.

[0018] The beneficial effects of the present invention are as follows: The collision acceleration gradient monitoring device of the present invention is conducive to timely obtaining the level of the acceleration of the collision object caused by the collision when a vehicle or a slope rockfall collides with the guardrail in a sensitive section of the road, so as to facilitate obtaining the severity of the corresponding collision accident and taking emergency measures in a timely manner. Moreover, it has low cost, good durability, high reliability, is convenient for maintenance and replacement, and is suitable for large-area and batch installation and use. Description of the Drawings

[0019] The present invention will be further described below in conjunction with the drawings and embodiments:

[0020] Figure 1 It is a structural schematic diagram of the present invention. Detailed Embodiments

[0021] Figure 1 It is a structural schematic diagram of the present invention. As shown in the figure: The collision acceleration gradient monitoring device of this embodiment includes a collision sensor, a display unit 2, and an energy supply unit 1; the collision sensor, the display unit 2, and the energy supply unit 1 are connected by a wire 3 to form a loop circuit; the energy supply unit 1 is such as a regulated power supply, the display unit 2 is such as a galvanometer, and the display unit 2 and the energy supply unit 1 can be separately arranged or integrally arranged; the collision sensor includes a plurality of conductive carbon rods 4 arranged in parallel, metal parts 5 arranged at both ends of the conductive carbon rods 4 along the length direction to form a parallel connection of a plurality of conductive carbon rods 4, and a mass block 6 arranged in an insulating manner in the middle of each conductive carbon rod 4 along the length direction; the conductive carbon rod 4 is a brittle conductive carbon rod, and the conductive carbon rod can be selected from conductive carbon rods that conform to "GB 12174-1990 Carbon Arc Gouging Conductive Carbon Rods" or similar products. The selection of the conductive carbon rod 4 belongs to the prior art and will not be elaborated here; the metal parts 5 at both ends are respectively connected to the energy supply unit 1 and the display unit 2 through the wire 3; the length direction of the conductive carbon rod 4 is the collision direction (the collision direction can be Figure 1In the Y direction (which can also be the Z direction), it is perpendicular to the multiple mass blocks 6, and the masses of the multiple mass blocks 6 are sequentially decreased along the collision direction (when the collision direction is the Y direction) or perpendicular to the collision direction (when the collision direction is the Z direction). When being collided, the conductive carbon rods 4 of different mass blocks 6 present different broken states to obtain different current values; the arrangement direction of the multiple conductive carbon rods 4 is the same as the arrangement direction of the roadside guardrail. The collision direction can be parallel to the plane formed by the multiple conductive carbon rods 4 or parallel to the plane formed by the multiple conductive carbon rods 4. In either case, it is necessary to make the collision direction perpendicular to the length direction of the conductive carbon rods 4; when a collision occurs, the sides of the multiple conductive carbon rods 4 of the collision sensor are subjected to the impact force from the collision body. Under the different collision acceleration inertial forces generated by different mass blocks 6 on the corresponding conductive carbon rods 4, the middle parts of the conductive carbon rods 4 are broken to different degrees, causing the resistance value of the collision sensor to change. When the voltage is constant, different current values are displayed through the display unit 2 such as a galvanometer. At this time, the current value can be read directly or remotely monitored by using existing wired or wireless transmission means to obtain the level of the collision body acceleration caused by the collision, and thus obtain the corresponding severity of the collision accident and take emergency measures in a timely manner; corresponding sound, light, and electric devices can also be matched to achieve a warning function, improving the acquisition efficiency; and it has low cost, good durability, high reliability, is convenient for inspection and replacement, and is suitable for large-area and batch installation and use.

[0022] In this embodiment, the lengths of the multiple mass blocks 6 along the length direction of the conductive carbon rods 4 are equal, and the cross-sectional areas are sequentially decreased along the collision direction or perpendicular to the collision direction; on the premise that the collision direction is perpendicular to the length direction of the conductive carbon rods 4, the lengths of the multiple mass blocks 6 along the length direction of the conductive carbon rods 4 are equal, and the cross-sectional areas of the mass blocks 6 are sequentially and gradually decreased along the collision direction or perpendicular to the collision direction, which is beneficial to generating different collision acceleration inertial forces on the conductive carbon rods 4 and thus obtaining the level of the collision body acceleration caused by the collision and the corresponding severity of the collision accident.

[0023] In this embodiment, the end faces at both ends of the multiple mass blocks 6 along the length direction of the conductive carbon rods 4 are flush; it is beneficial to avoid being unable to accurately obtain the level of the collision body acceleration caused by the collision due to different distances from the collision point when the multiple mass blocks 6 are arranged at different positions on the corresponding conductive carbon rods 4 during a collision.

[0024] In this embodiment, the mass block 6 is provided with an installation hole (not marked) for sleeving the mass block 6 on the conductive carbon rod 4, and the two are fixedly connected by filling an insulating material between the conductive carbon rod 4 and the hole wall of the mass block 6; it is beneficial to the insulating and fixed installation of the mass block 6 on the corresponding conductive carbon rod 4; preferably, the space between the conductive carbon rod 4 and the hole wall of the mass block 6 is filled with an insulating material such as insulating glue, which is beneficial to ensuring that the fixed connection lengths of the conductive carbon rod 4 and the mass block 6 are consistent.

[0025] In this embodiment, the mass block 6 has a cylindrical or regular polygonal columnar structure; preferably, it is a cylindrical mass block 6 with the same height as the cylinder. On the premise that the collision direction is perpendicular to the length direction of the conductive carbon rod 4, the diameter of the cylindrical mass block 6 gradually decreases in sequence along the collision direction or perpendicular to the collision direction.

[0026] In this embodiment, the lengths and cross-sectional areas of the plurality of conductive carbon rods 4 are the same; this is conducive to ensuring that the resistance values of the respective conductive carbon rods 4 are the same, and avoiding interference with the monitoring results due to different resistance values of the conductive carbon rods 4.

[0027] In this embodiment, a groove (not shown) for accommodating the end of the conductive carbon rod 4 is provided at the connection of the metal part 5 corresponding to the conductive carbon rod 4, and a fixed connection between the end of the conductive carbon rod 4 and the metal part 5 is formed through a conductive material; the conductive material such as conductive glue added with conductive fillers, and the selection of conductive glue belongs to the prior art and will not be elaborated here; it is conducive to forming a plurality of conductive carbon rods 4 arranged side by side and stably between two metal parts 5 such as strip-shaped metal blocks, which is conducive to the stable assembly of the collision sensor.

[0028] In this embodiment, the number of the conductive carbon rods 4 provided is determined according to the number of levels required for the collision acceleration gradient warning.

[0029] In this embodiment, the mass of the mass block 6 is obtained by back-calculation from the number of acceleration levels to be tested and the force value required to break the conductive carbon rod in the middle of the conductive carbon rod; for example, the conductive carbon rod 4 can be regarded as a beam with equal cross-section fixed at both ends and subjected to a transverse force, its material flexural strength is f, the section modulus of the conductive carbon rod 4 in bending is W, the length of the conductive carbon rod 4 between the two metal parts is l, the mass of the mass block 6 is m, and the linear distributed mass of the conductive carbon rod 4 itself is m c Assume that when the conductive carbon rod 4 and its fixed ends as a whole are excited by an acceleration a, it just causes the middle of the conductive carbon rod 4 along the length direction to break, then according to the principle of material mechanics, the following mechanical relationship can be established:

[0030] (mal / 8 + m c al 2 / 24) / W = f (1)

[0031] Using formula (1), after determining the acceleration gradient value a and the relevant physical and mechanical parameters f, W, l, mc of the conductive carbon rod 4, the mass m of the mass block 6 can be obtained by back-solving.

[0032] In this embodiment, the material of the mass block 6 is stainless steel or copper; the metal part 5 is a strip-shaped metal block and the material is stainless steel or copper.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A collision acceleration gradient monitoring device, characterized in that: It includes a collision sensor, a display unit, and an energy supply unit; the collision sensor includes a plurality of conductive carbon rods arranged in parallel, metal pieces provided at both ends of the conductive carbon rods along the length direction to form a parallel connection of the plurality of conductive carbon rods, and a mass block provided in the middle of each conductive carbon rod along the length direction in an insulating manner; the metal pieces at both ends are connected to the energy supply unit and the display unit through wires; the length direction of the conductive carbon rods is perpendicular to the collision direction, and the masses of the plurality of mass blocks are sequentially reduced along the collision direction or perpendicular to the collision direction. When being collided, the conductive carbon rods provided with different mass blocks present different broken states to obtain different current values. The lengths of the plurality of mass blocks along the length direction of the conductive carbon rods are equal, and the cross-sectional areas are sequentially reduced along the collision direction or perpendicular to the collision direction. The metal pieces are provided with grooves for accommodating the ends of the conductive carbon rods at the joints corresponding to the conductive carbon rods, and a fixed connection between the ends of the conductive carbon rods and the metal pieces is formed through a conductive material.

2. The collision acceleration gradient monitoring device according to claim 1, characterized in that: The end faces of the plurality of mass blocks along the length direction of the conductive carbon rods are flush with each other.

3. The collision acceleration gradient monitoring device according to claim 1, characterized in that: The mass block is provided with a mounting hole for sleeving the mass block on the conductive carbon rod, and the fixed connection between the two is realized by filling an insulating material between the conductive carbon rod and the hole wall of the mass block.

4. The collision acceleration gradient monitoring device according to claim 1, characterized in that: The mass block has a cylindrical or regular polygon columnar structure.

5. The collision acceleration gradient monitoring device according to claim 1, characterized in that: The lengths and cross-sectional areas of the plurality of conductive carbon rods are the same.

6. The collision acceleration gradient monitoring device according to claim 1, characterized in that: The number of the conductive carbon rods is determined according to the number of levels required for the collision acceleration ladder warning.

7. The collision acceleration gradient monitoring device according to claim 1, characterized in that: The mass of the mass block is obtained by back-calculating from the acceleration ladder value to be tested and the force value required to break the conductive carbon rod in the middle of the conductive carbon rod.

8. The collision acceleration gradient monitoring device according to claim 1, characterized in that: The material of the mass block is stainless steel or copper; the metal piece is a strip-shaped metal block and the material is stainless steel or copper.

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