Track clamping type force sensor integrated fixture

Abstract

The utility model provides a rail clamping type force sensor integrated fixture which comprises a main support, an auxiliary support and a shearing force sensor fixedly installed on the side wall of the main support, the main support and the auxiliary support are detachably connected to the two sides of a steel rail through bolts, and transverse force strain holes are formed in the side wall of the main support. A resistance strain gauge is pasted in the transverse force strain hole, the resistance strain gauge can convert transverse deformation of the steel rail into an electric signal, and a strain amplification groove is formed in the upper side of the transverse force strain hole; according to the utility model, the transverse force strain holes are arranged on the main support, so that the shape of the clamp is consistent with that of a common shear force sensor clamp at present, and normal use of a shear force sensor is ensured; the resistance strain gauges are arranged in the transverse force strain holes, and the transverse force measurement module is integrated into the clamp of the shear force sensor, so that integration of shear force and transverse force measurement functions is realized, and the problems that a two-dimensional force plate type sensor needs to replace a sleeper, and is large in size and heavy in weight are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of rail side dynamic monitoring system especially relates to a rail clamping type force sensor integrated fixture. BACKGROUND

[0002] Rail side dynamic monitoring system (hereinafter referred to as TPDS) has been widely applied on the main line of railway in China, the measuring area formed by sensor array on the track is used to continuously measure and analyze the lateral and vertical wheel rail force of passing vehicles, and further realize the functions of vehicle operation quality network evaluation, wheel tread damage identification, overload detection and the like. By the end of 2022, 168 sets of network TPDS equipment were constructed in the whole railway, which significantly improved the vehicle operation state, greatly reduced the accident rate, reduced the maintenance cost of freight cars and produced huge economic benefits, providing strong guarantee for safe railway transportation.

[0003] At present, the sensors in the TPDS measuring area include two-dimensional force plate type sensors and rail clamping type shear sensors, wherein the two-dimensional force plate type sensors are responsible for the measurement of vertical and lateral wheel rail forces. The inventors found in practical application that the two-dimensional force plate type sensors need to be used with special sleepers, and the original sleepers need to be replaced before installation, which has the problems of large construction amount and long construction period, and the two-dimensional force sensors need to be resistant to the impact of wheel rail force due to being installed below the steel rail, and need to be compatible with the existing track fasteners, resulting in large size and weight of the sensor itself, and the problems of difficult installation and transportation, and increased construction amount and construction period. SUMMARY

[0004] In order to solve the problems of TPDS two-dimensional force sensor needing to replace special sleepers and needing to be compatible with existing track fasteners, resulting in large size and weight of the sensor itself, the utility model provides a rail clamping type force sensor integrated fixture;

[0005] The rail clamping type force sensor integrated fixture provided by the utility model adopts the following technical scheme:

[0006] A rail clamping type force sensor integrated fixture, comprising a main support, a vice support and a shear sensor fixedly installed on the side wall of the main support, the main support and the vice support are detachably connected on both sides of the steel rail through bolts, a lateral force strain hole is formed in the side wall of the main support, a resistance strain gage is pasted in the lateral force strain hole, the resistance strain gage can convert the lateral deformation of the steel rail into an electric signal, a strain amplification groove is formed on the upper side of the lateral force strain hole;

[0007] Further, the strain amplification grooves are two, and the two strain amplification grooves are arranged in opposite positions on both sides of the side wall of the main support;

[0008] Further, two through holes penetrating the main support are arranged in the lateral force strain hole, and the two through holes are arranged on the two sides of the resistance strain gauge respectively;

[0009] Further, the main support comprises a detection plate and a fixing base, the detection plate is arranged on the top of the fixing base and is integrally formed with the fixing base, and the lateral force strain hole is arranged on the bottom of the side wall of the detection plate and is located on the upper side of the junction of the fixing base and the detection plate;

[0010] Further, a pressing bolt is threadedly connected to the side wall of the detection plate, and a shear force sensor is detachably connected to the end of the pressing bolt, and the shear force sensor is tightly attached to the side wall of the steel rail through the pressing bolt;

[0011] Further, a protective shell is fixedly installed on the top of the main support through bolts;

[0012] Further, an anti-skid rubber sheet is arranged at the position where the shear force sensor contacts the steel rail, and the anti-skid rubber sheet is attached to the side wall of the steel rail.

[0013] Therefore, the utility model has the advantages that:

[0014] The lateral force strain hole is arranged on the main support, so that the application is consistent with the commonly used shear force sensor fixture, and the shear force sensor can be normally used; the resistance strain gauge is arranged in the lateral force strain hole, the lateral force measuring module is integrated into the fixture of the shear force sensor, the integration of the shear force and the lateral force measuring function is realized, the two-dimensional force plate sensor in the existing TPDS can be replaced by matching the shear force to vertical force algorithm, and the problems of the two-dimensional force plate sensor, such as the need to replace the sleeper, large size and heavy weight, are solved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view schematic diagram of the utility model;

[0016] Figure 2 It is a front view schematic diagram of the main support and the auxiliary support of the utility model;

[0017] Figure 3 It is a front view schematic diagram of the utility model Figure 2 It is an enlarged schematic diagram of the A structure in the utility model;

[0018] Figure 4 It is a right view schematic diagram of the utility model;

[0019] Figure 5 It is a schematic diagram of the overall appearance of the utility model;

[0020] Figure 6 It is a right side view schematic diagram of the lateral force strain hole of the utility model.

[0021] As shown in Figure: 1 - main support, 11 - detection plate, 12 - fixed base, 13 - compression bolt, 14 - protective shell, 15 - anti-skid rubber sheet, 2 - vice support, 3 - shear sensor, 4 - transverse force strain hole, 41 - through hole, 5 - resistance strain gauge, 6 - strain amplification groove, 7 - steel rail. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings Figure 1 - attached Figure 6 Further detailed description of the utility model is made as follows:

[0023] The utility model discloses a rail type force sensor integrated fixture, like Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 As shown in the utility model discloses a rail type force sensor integrated fixture, including main support 1, vice support 2 and the shear sensor 3 of fixed installation in the lateral wall of main support 1, the both sides of steel rail 7 are detachably connected through bolt between main support 1 and vice support 2, the lateral wall of main support 1 is provided with transverse force strain hole 4, and resistance strain gauge 5 is pasted in transverse force strain hole 4, and resistance strain gauge 5 can convert the transverse deformation of steel rail 7 into electric signal, and the upper side of transverse force strain hole 4 is provided with strain amplification groove 6, in this embodiment, the connection relationship of main support 1 and vice support 2 with steel rail 7 is as shown in Figure 2 , wherein main support 1 is arranged on the side of steel rail 7 away from railway track, and the lateral wall bottom of main support 1 and vice support 2 is provided with connecting hole, the number of connecting hole is two in this embodiment, and bolt is arranged in the two connecting holes, and main support 1 and vice support 2 are inserted on the both sides of steel rail 7 and detachably connected through bolt. The position of transverse force strain hole 4 is as shown in Figure 2 , when steel rail 7 is subjected to transverse force, steel rail 7 bends to Figure 2 right side, and the top of main support 1 bends to right, wherein the stress concentration area is transverse force strain hole 4, and the area of deformation is the largest, and data acquisition is more accurate. The specific position of resistance strain gauge 5 is as shown in Figure 2 , resistance strain gauge 5 will form Wheatstone bridge (an instrument for measuring the resistance value of an element) on main support 1, when the area where resistance strain gauge 5 is located produces deformation, the resistance value of resistance strain gauge 5 will change, so that the bridge output voltage signal. The specific position of strain amplification groove 6 is as shown in Figure 1 、 Figure 3 , by setting strain amplification groove 6, stress is further concentrated, the deformation of strain area is expanded, the output signal can be enhanced, and sensitivity is improved, preferably, strain amplification groove 6 is two, and the two strain amplification grooves 6 are oppositely arranged on the lateral wall of main support 1, preferably, resistance strain gauge 5 in transverse force strain hole 4 is sealed by glue pouring.

[0024] As shown in Figure 3 , two through holes 41 are arranged in the lateral force strain hole 4 and penetrate the main support 1, and the two through holes 41 are arranged on the two sides of the resistance strain gauge 5; in the embodiment, the positions of the two through holes 41 are as shown in Figure 3 , the two through holes 41 are parallel to the steel rail 7 in space, and by arranging the through holes 41 on the two sides of the area where the resistance strain gauge 5 is arranged, the deformation of the main support 1 is further concentrated in the area where the resistance strain gauge 5 is arranged, which is beneficial to amplify the output voltage signal of the Wheatstone bridge composed of the resistance strain gauge 5.

[0025] As shown in Figure 2 , Figure 3 , the main support 1 comprises a detection plate 11 and a fixed base 12, the detection plate 11 is arranged on the top of the fixed base 12 and is integrally formed with the fixed base 12, and the lateral force strain hole 4 is arranged at the bottom of the side wall of the detection plate 11 and is located on the upper side of the junction of the fixed base 12 and the detection plate 11; in the embodiment, the positional relationship between the detection plate 11 and the fixed base 12 is as shown in Figure 2 , and the specific position of the lateral force strain hole 4 is as shown in Figure 2 , Figure 3 , the junction of the fixed base 12 and the detection plate 11 is a stress concentration area and the area with the largest deformation, therefore, the lateral force strain hole 4 should be arranged at the lowermost side of the side wall of the detection plate 11, close to the virtual junction line of the fixed base 12 and the detection plate 11 and located on the upper side of the virtual junction line.

[0026] As shown in Figure 1 , Figure 2 , Figure 3 , the side wall of the detection plate 11 is threadedly connected with a compression bolt 13, the end of the compression bolt 13 is detachably connected with the shear sensor 3, and the shear sensor 3 is tightly attached to the side wall of the steel rail 7 through the compression bolt 13; in the embodiment, the connection mode of the compression bolt 13 and the shear sensor 3 is a means known to those skilled in the art, and the embodiment takes four compression bolts 13 as an example, the four compression bolts 13 are equidistantly distributed on the side wall of the upper detection plate 11 part of the main support 1 in a regular quadrilateral contour; when the steel rail 7 is subjected to a lateral force, the steel rail 7 bends to the right, and the force is transmitted from the shear sensor 3 to the main support 1 through the compression bolt 13 in sequence, according to the shear characteristics of the steel rail 7, the shear data can be deduced to the wheel rail vertical force after processing, and the shear sensor 3 can measure the vertical force of the steel rail 7. Figure 2

[0027] As shown in Figure 5 , the top of the main support 1 is fixedly installed with a protective shell 14 through bolts; in the embodiment, the protective shell 14 can protect the internal shear sensor 3 and the main support 1 from external damage. ​

[0028] As Figure 1 、 Figure 6 shown, the shear sensor 3 is provided with an anti-skid rubber sheet 15 at the position in contact with the rail 7, and the anti-skid rubber sheet 15 is pasted on the side wall of the rail 7; in the embodiment, the anti-skid rubber sheet 15 is pasted on the side wall of the rail 7 close to the main support 1, and the shear sensor 3 is pressed on the anti-skid rubber sheet 15 from the other side, and by increasing the anti-skid rubber sheet 15, the shear sensor 3 can be prevented from being dislocated, and the accuracy of the detection data of the shear sensor 3 is ensured.

[0029] The implementation principle of the embodiment of the utility model is:

[0030] When the rail 7 is subjected to a transverse force, the rail 7 is deformed, and the force is transmitted to the transverse force strain hole 4 along the shear sensor 3 - the compression bolt 13 - the main support 1; when the area where the resistance strain gauge 5 is located is deformed, the resistance of the resistance strain gauge 5 will change, and the Wheatstone bridge composed of the resistance strain gauge 5 outputs a voltage signal; the shear data collected by the shear sensor 3 can be deduced to the wheel rail vertical force after processing, and the wheel rail vertical force data and the data output by the resistance strain gauge 5 are integrated for next calculation.

[0031] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. The various components mentioned in the utility model are common technologies in the prior art, which should be understood by the skilled person in the art. The utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A clamping device for a rail force sensor, comprising a main support (1), a secondary support (2) and a shear force sensor (3) fixedly installed on the side wall of the main support (1), the main support (1) and the secondary support (2) being detachably connected by bolts on both sides of a steel rail (7), characterized in that: The side wall of the main support (1) is provided with a lateral force strain hole (4), and a resistance strain gauge (5) is attached in the lateral force strain hole (4), the resistance strain gauge (5) can convert the lateral deformation of the steel rail (7) into an electric signal, and the upper side of the lateral force strain hole (4) is provided with a strain amplification groove (6).

2. The clamped rail force sensor integrated fixture of claim 1, wherein: The strain amplification groove (6) is two, and the two strain amplification grooves (6) are arranged in opposite positions on the two sides of the side wall of the main support (1).

3. The clamped rail force sensor integrated fixture of claim 2, wherein: The lateral force strain hole (4) is provided with two through holes (41) penetrating through the main support (1), and the two through holes (41) are arranged on the two sides of the resistance strain gauge (5) respectively.

4. The clamped rail force sensor integrated fixture of claim 3, wherein: The main support (1) comprises a detection plate (11) and a fixed base (12), the detection plate (11) is arranged on the top of the fixed base (12) and is integrally formed with the fixed base (12), the lateral force strain hole (4) is arranged on the side wall of the bottom of the detection plate (11) and is located on the upper side of the junction of the fixed base (12) and the detection plate (11).

5. The clamped rail force sensor integrated fixture of claim 4, wherein: The side wall of the detection plate (11) is threadedly connected with a compression bolt (13), the end of the compression bolt (13) is detachably connected with a shear force sensor (3), and the shear force sensor (3) is tightly attached to the side wall of the steel rail (7) through the compression bolt (13).

6. The clamped rail force sensor integrated fixture of claim 1, wherein: The top of the main support (1) is fixedly provided with a protective shell (14) through bolts.

7. The clamped rail force sensor integrated fixture of claim 5, wherein: The position where the shear force sensor (3) contacts the steel rail (7) is provided with an anti-skid rubber sheet (15), and the anti-skid rubber sheet (15) is attached to the side wall of the steel rail (7).

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