A contact force detection device and a pantograph

Abstract

A contact force detection device and a pantograph, the contact force detection device being used to detect the contact force between the pantograph and the catenary. The pantograph includes one or more bow heads, each bow head including a sliding plate and a bow head support connected to both ends of the sliding plate. The contact force detection device includes: a force receiving part for connecting one end of the sliding plate to conduct the contact force between the sliding plate and the catenary; a strain part, the first end of the strain part being connected to the force receiving part and the first end of the strain part being suspended to undergo strain under the action of the contact force; a strain detection member provided on the strain part for detecting the strain of the strain part; and a bow head support part connected to the second end of the strain part and the bow head support. The above solution can realize the detection of the contact force between the pantograph and the catenary.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of measurement technologies, and particularly to a contact force detection device and a pantograph. Background Art

[0002] Subways have gradually become the main and efficient means of transportation in a city. Compared with other urban transportation methods, firstly, subways have a large transportation capacity, and their transportation capacity is about seven to ten times that of cars and buses, which can provide convenience for residents; secondly, subways run at high speeds, and the running speed can reach 80 km per hour, and intercity subways can reach a speed of 160 km per hour. Usually, a pantograph is installed on the subway, and power is taken from the catenary through the cooperation of the pantograph and the catenary to realize the normal operation of the subway. A stable dynamic contact force between the pantograph and the catenary is the key to ensuring good current collection relationship of the subway and maintaining continuous power. Therefore, the operation safety of urban subways, especially the normal working state between the pantograph and the catenary, is particularly important for the normal operation of the subway.

[0003] In reality, when the subway is running, due to the vibration of the pantograph-catenary, the contact force between the pantograph slider and the catenary wire shows a characteristic of random change, resulting in an unconstant contact force. If the contact force between the catenary and the pantograph is too large, accidents such as the pantograph pulling off the catenary or the catenary hitting the pantograph flying may occur, while if the contact force is too small, phenomena such as poor current collection of the pantograph and arcing between the pantograph and the catenary will occur. Therefore, during the train running process, there must be a reasonable contact force between the pantograph and the catenary so that the pantograph can safely introduce the current from the catenary into the traction converter system in the vehicle body, thereby providing continuous and effective power for the train. In addition, it can also bring convenience to the production, installation and maintenance of rail transit operations.

[0004] Currently, the main technologies for monitoring the pantograph-catenary relationship are visual imaging technology and electronic sensing technology. Among them, visual imaging technology belongs to non-contact measurement, so it cannot effectively detect and feedback on the dynamic characteristics between the pantograph and the catenary, such as hard points and pantograph-catenary contact force, and only plays a role in post-event video viewing and accident tracing for most pantograph and pantograph-catenary relationship operation parameters. As for electronic sensing technology, although it belongs to contact measurement, and a pantograph-catenary contact force sensor and an acceleration sensor are respectively installed on the pantograph head, the signals collected by the active detection method are seriously affected by electromagnetic interference, bringing great difficulties to the subsequent accurate analysis of data. An effective detection method is urgently needed to solve the problem of the contact force between the pantograph and the catenary. Summary of the Invention

[0005] One of the purposes of the embodiments of the present invention is to provide a contact force detection device for detecting the contact force between a pantograph and a catenary.

[0006] To solve the above technical problems, an embodiment of the present invention provides a contact force detection device for detecting the contact force between a pantograph and a catenary. The pantograph includes one or more bow heads, and each bow head includes a slide plate and a bow head support connected to both ends of the slide plate. The contact force detection device includes: a force-receiving part for connecting one end of the slide plate to conduct the contact force between the slide plate and the catenary; a strain part, the first end of the strain part is connected to the force-receiving part, and the first end of the strain part is suspended to generate strain under the action of the contact force; a strain detection member arranged on the strain part for detecting the strain of the strain part; a bow head support part connected to the second end of the strain part and the bow head support.

[0007] Optionally, the force-receiving part includes a force-receiving platform and a force-receiving column. Among them, the force-receiving platform is used for connecting one end of the slide plate; the force-receiving column is connected to the first end of the strain part and the force-receiving platform.

[0008] Optionally, the force-receiving part includes a bent limiting part for restricting the movement of the slide plate relative to the contact force detection device.

[0009] Optionally, the strain part includes an intermediate strain beam connected to the force-receiving part, and the intermediate strain beam is used to generate strain under the action of the contact force; the strain detection member is arranged on the intermediate strain beam.

[0010] Optionally, from the end connected to the force-receiving part to the direction away from the force-receiving part, the thickness of the intermediate strain beam gradually decreases.

[0011] Optionally, the strain part includes an upper strain beam located above the intermediate strain beam and / or a lower strain beam located below the intermediate strain beam. There is a cavity between the upper strain beam and the intermediate strain beam, and there is a cavity between the lower strain beam and the intermediate strain beam.

[0012] Optionally, a through hole is provided at the second end of the strain part, the through hole penetrates the second end of the strain part, and the extending direction of the through hole is the same as the extending direction of the cavity.

[0013] Optionally, the contact force detection device further includes a protective cover, and the protective cover covers a part of the outer surface of the strain part to isolate the strain detection member from being exposed to the outside.

[0014] Optionally, the strain detection member includes two optical strain gauges, and the two optical strain gauges are symmetrically arranged on both side surfaces of the intermediate strain beam for detecting the strain of the intermediate strain beam.

[0015] Optionally, the two optical strain gauges are disposed at a position of the middle strain beam close to the force-receiving portion.

[0016] Optionally, the strain detection member includes an optical strain gauge and a temperature compensation piece. The optical strain gauge is used to detect the strain of the middle strain beam, and the temperature compensation piece is used to detect the strain of the middle strain beam caused by temperature.

[0017] Optionally, the contact force detection device further includes: a latch assembly for connecting the strain portion and the bow head support portion.

[0018] Optionally, the latch assembly includes a latch upper ear, a latch lower ear, and a latch connecting member. Among them: the latch upper ear is disposed at the second end of the force-receiving portion or the strain portion; the latch lower ear is disposed at the bow head support portion; the latch connecting member is used to connect the latch upper ear and the latch lower ear, and a natural gap is maintained between the latch upper ear and the latch lower ear.

[0019] Optionally, the strain portion is provided with a tail cable plug for leading out the tail fiber of the strain detection member.

[0020] Optionally, the bow head support portion includes: a support platform extending in the horizontal direction for connecting the bow head support; or, the bow head support portion includes two oppositely arranged bow head support seat ears, and the bow head support portion straddles the bow head support, and the two bow head support seat ears are respectively connected to the bow head support.

[0021] Optionally, the two bow head support seat ears extend from the strain portion in a direction away from the strain portion and the force-receiving portion.

[0022] An embodiment of the present invention further provides a pantograph, including: one or more bow heads, each bow head including a slide plate and a bow head support connected to both ends of the slide plate; and further including any one of the above contact force detection devices, the contact force detection device is disposed between the slide plate and the bow head support and is respectively connected to the slide plate and the bow head support.

[0023] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0024] The contact force detection device is connected to the pantograph. The contact force detection device may include a force-receiving part, a strain part, a strain detection component, and a bow head support part. Among them, the force-receiving part is connected to one end of the skateboard of the pantograph and can conduct the contact force between the skateboard and the catenary. The first end of the strain part is connected to the force-receiving part, and the first end of the strain part is suspended so as to undergo strain under the action of the contact force. The bow head support part is connected to the second end of the strain part and the bow head support seat. Through the connection between the bow head support part and the bow head support seat, and the connection between the force-receiving part and one end of the skateboard of the pantograph, the connection between the contact force detection device and the pantograph is realized. The force-receiving part is connected to one end of the skateboard of the pantograph, and the contact force between the skateboard and the catenary can be conducted to the strain part, and then the strain of the strain part is detected by the strain detection component to realize the measurement of the contact force. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of a contact force detection device in an embodiment of the present invention;

[0026] Figure 2 is Figure 1 an exploded view of;

[0027] Figure 3 is a partial schematic structural diagram of a contact force detection device in an embodiment of the present invention;

[0028] Figure 4 is a schematic diagram of the relative positions of a strain part and a strain detection component in an embodiment of the present invention;

[0029] Figure 5 is Figure 2 a side view of a partial structure in;

[0030] Figure 6 is Figure 2 a top view of a partial structure in;

[0031] Figure 7 is Figure 2 a right view of a partial structure in;

[0032] Figure 8 is a schematic structural diagram of another contact force detection device in an embodiment of the present invention;

[0033] Figure 9 is Figure 8 an exploded view of;

[0034] Figure 10 is Figure 9 a side view of a partial structure in;

[0035] Figure 11 is Figure 9 a top view of a partial structure in;

[0036] Figure 12 is Figure 9 the right view of a partial structure in;

[0037] Figure 13 is Figure 9 the left view of a partial structure in;

[0038] Figure 14 is a schematic structural view of a pantograph in an embodiment of the present invention. Specific Embodiment

[0039] As described above, the main technologies for monitoring the pantograph-catenary relationship include visual imaging technology and electronic sensing technology. Among them, visual imaging technology belongs to non-contact measurement. Therefore, it cannot effectively detect and feedback on the dynamic characteristics between the pantograph and the catenary, such as hard points and pantograph-catenary contact force, etc., and only plays a role in post-event video viewing and accident tracing for most of the pantograph and pantograph-catenary relationship operating parameters. As for electronic sensing technology, although it belongs to contact measurement and bow-net contact force sensors and acceleration sensors are respectively installed on the pantograph head, the signals collected by the active detection method are seriously affected by electromagnetic interference, bringing great difficulties to the accurate analysis of subsequent data.

[0040] To solve the above problems, in an embodiment of the present invention, a contact force detection device is connected to the pantograph. The contact force detection device may include a force-receiving part, a strain part, a strain detection component, and a bow head support part. Among them, the force-receiving part is connected to one end of the skateboard of the pantograph and can conduct the contact force between the skateboard and the catenary. The first end of the strain part is connected to the force-receiving part, and the first end of the strain part is suspended to generate strain under the action of the contact force. The bow head support part is connected to the second end of the strain part and the bow head support. Through the connection between the bow head support part and the bow head support, and the connection between the force-receiving part and one end of the skateboard of the pantograph, the connection between the contact force detection device and the pantograph is realized. And the force-receiving part is connected to one end of the skateboard of the pantograph, and the contact force between the skateboard and the catenary can be conducted to the strain part, and then the strain of the strain part is detected by the strain detection component to realize the measurement of the contact force.

[0041] To make the above objects, features, and beneficial effects of the embodiments of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given with reference to the accompanying drawings.

[0042] An embodiment of the present invention provides a contact force detection device. The contact force detection device is arranged on the pantograph and can detect the contact force between the pantograph and the catenary. The pantograph may include one or more bow heads, and each bow head includes a skateboard and a bow head support. The number of bow head supports is usually multiple, and each bow head support is connected to both ends of the skateboard.

[0043] Refer to Figure 1, a structural schematic diagram of a contact force detection device in an embodiment of the present invention is given. Figure 2 is Figure 1 exploded view of. Figure 3 It is a partial structural schematic diagram of a contact force detection device in an embodiment of the present invention. Figure 4 It is a schematic diagram of the relative positions of a strain portion and a strain detection member in an embodiment of the present invention. Figure 5 is Figure 2 side view of a partial structure in. Figure 8 It is a structural schematic diagram of another contact force detection device in an embodiment of the present invention. Figure 9 is Figure 8 exploded view of. Figure 10 is Figure 9 side view of a partial structure in, and hereinafter in conjunction with Figures 1 to 5 , Figures 8 to 10 , the specific structure of the contact force detection device will be described.

[0044] In a specific implementation, the contact force detection device 100 may include a force-receiving portion 10, a strain portion 20, a strain detection member 30, and a bow head support 40.

[0045] The force-receiving portion 10 is used to connect one end of the skateboard to conduct the contact force between the skateboard and the catenary.

[0046] The strain portion 20 includes a first end 21 and a second end 22. The first end 21 of the strain portion 20 is connected to the force-receiving portion 10, and the first end 21 of the strain portion 20 is suspended to facilitate strain under the action of the contact force.

[0047] Referring to Figure 5 and Figure 10 , the first end 21 of the strain portion 20 is suspended, so that there is a gap n between the strain portion 20 and the bow head support portion 40. That is, the first end 21 of the strain portion 20 is not connected to the bow head support portion 40.

[0048] The strain detection member 30 is disposed on the strain portion 20 and can detect the strain of the strain portion 20.

[0049] The bow head support portion 40 is connected to the second end 22 of the strain portion 20 and the bow head support.

[0050] As can be seen from the above, the contact force detection device is connected to the pantograph. The contact force detection device may include a force-receiving part, a strain part, a strain detection element, and a bow head support part. Among them, the force-receiving part is connected to one end of the slide plate of the pantograph and can conduct the contact force between the slide plate and the catenary. The first end of the strain part is connected to the force-receiving part, and the first end of the strain part is suspended to generate strain under the action of the contact force. The bow head support part is connected to the second end of the strain part and the bow head support seat. Through the connection between the bow head support part and the bow head support seat, and the connection between the force-receiving part and one end of the slide plate of the pantograph, the connection between the contact force detection device and the pantograph is realized. And the force-receiving part is connected to one end of the slide plate of the pantograph, and the contact force between the slide plate and the catenary can be conducted to the strain part, and then the strain of the strain part is detected by the strain detection element to realize the measurement of the contact force.

[0051] In a specific implementation, the force-receiving part 10 may include a force-receiving platform 11 and a force-receiving column 12. Among them, the force-receiving platform 11 is connected to one end of the slide plate. The force-receiving column 12 is connected to the first end 21 of the strain part 20 and the force-receiving platform 11. The force-receiving platform 11 is connected to one end of the slide plate, and the contact force between the slide plate and the catenary can be transmitted to the strain part 20 through the force-receiving column 12.

[0052] In some embodiments, in order to improve the accuracy of the contact force detection between the pantograph and the catenary, the force-receiving platform 11 and the force-receiving column 12 are integrally formed. In addition, the integral formation of the force-receiving platform 11 and the force-receiving column 12 can also facilitate the mass production of the contact force detection device 100, etc.

[0053] In a specific implementation, since the pantograph usually includes various types, the structures of the slide plates of different types of pantographs are different, and the specific connection methods between the slide plates and the bow head support seats are also different. In order to adapt to different types of pantographs, the force-receiving part 10 in the contact force detection device 100 can be provided with a corresponding structure according to the specific type of the pantograph. Specifically, it can be set according to the specific structure of the slide plate in the pantograph, as long as it can be connected to the slide plate and the force-receiving part 10 is adapted to the slide plate.

[0054] Furthermore, the surface shape of the surface of the force-receiving part 10 in contact with the slide plate is the same as the shape of the slide plate.

[0055] In some embodiments, since the slide plate is usually arc-shaped, in order to better adapt to the slide plate structure, the force-receiving platform 11 can be inclined or arc-shaped to closely fit the slide plate.

[0056] A first connection hole 14 may be provided on the force-receiving platform 11. The first connection hole 14 is used to connect one end of the slide plate. Specifically, it can be connected to the slide plate through the first connection hole 14 in cooperation with fasteners such as screws. The number, size, and setting position of the first connection hole 14 can be configured according to the connection holes on the slide plate, etc.

[0057] Among them, Figures 1 to 7 Figure 1 shows a schematic structural diagram of a contact force detection device applicable to a leaf spring pantograph. Among them, Figure 5 is Figure 2 a side view of a partial structure in Figure 6 is Figure 2 a top view of a partial structure in Figure 7 is Figure 2 a right view of a partial structure in

[0058] Figures 8 to 13 Figure 2 shows a schematic structural diagram of a contact force detection device applicable to a tension spring pantograph. Among them, Figure 11 is Figure 9 a top view of a partial structure in Figure 12 is Figure 9 a right view of a partial structure in Figure 13 is Figure 9 a left view of a partial structure in

[0059] It can be understood that the specific structure of the force-receiving part 10 in the contact force detection device 100 adapted to other types of pantographs is not exemplified one by one here.

[0060] In a specific implementation, in order to prevent the contact force detection device 100 from moving relative to the pantograph, the force-receiving part 10 may further include a bent limiting part 13. The bent limiting part 13 is used to limit the movement of the skate relative to the contact force detection device 100.

[0061] In some non-limiting embodiments, bent portions extend from both sides of the force-receiving platform 11 in a direction away from the force-receiving platform 11 to form a bent limiting part 13. The bent limiting part 13 is bent toward the skate to wrap a part of the structure of the skate, preventing the skate from moving or rotating in the horizontal direction, etc., and improving the reliability of the connection between the contact force detection device 100 and the skate.

[0062] In a specific implementation, referring to Figure 2 and Figure 9 , the strain part 20 may include an intermediate strain beam 23. The intermediate strain beam 23 is connected to the force-receiving part 10. The intermediate strain beam 23 can undergo strain under the action of the contact force. The strain detection member 30 is disposed on the intermediate strain beam 23 for detecting the strain of the intermediate strain beam 23. The strain of the intermediate strain beam 23 detected by the strain detection member 30 can estimate the contact force between the pantograph and the catenary.

[0063] Further, from the end of the intermediate strain beam 23 connected to the force-receiving part 10 to the direction away from the force-receiving part 10, the thickness of the intermediate strain beam 23 gradually decreases. Since the area where the intermediate strain beam 23 undergoes strain is close to the force-receiving part 10, in this way, while ensuring that the intermediate strain beam 23 can undergo strain, the strength of the intermediate strain beam 23 can be improved, and the probability of the intermediate strain beam 23 breaking after multiple strains can be reduced.

[0064] Specifically, when the force-receiving part 10 includes a force-receiving platform 11 and a force-receiving column 12, one end of the intermediate strain beam 23 is connected to the force-receiving column 12.

[0065] Further, in some non-limiting embodiments, the strain part 20 may further include an upper strain beam 24 located above the intermediate strain beam 23. And / or, the strain part 20 may further include a lower strain beam 25 located below the intermediate strain beam 23.

[0066] When the strain part 20 includes the upper strain beam 24, there is a cavity 26 between the upper strain beam 24 and the intermediate strain beam 23.

[0067] When the strain part 20 includes the lower strain beam 25, there is a cavity 26 between the lower strain beam 25 and the intermediate strain beam 23.

[0068] The upper strain beam 24 and the lower strain beam 25 can further improve the strength of the strain part 20. The cavity 26 can, while ensuring the improvement of the strength of the strain part 20, also take into account the ease of strain of the strain part 20, so that the strain part 20 is prone to strain under the action of a contact force.

[0069] In some embodiments, when the strain part 20 includes the upper strain beam 24 or the lower strain beam 25, the upper strain beam 24, the intermediate strain beam 23, and the cavity 26 therebetween cooperate with other structures of the strain part 20 to form a structure generally in the shape of a "mouth". When the strain part 20 includes both the upper strain beam 24 and the lower strain beam 25, the upper strain beam 24, the intermediate strain beam 23, the lower strain beam 25, and the cavity 26 cooperate with other structures of the strain part 20 to form a structure generally in the shape of a "day" or an "8".

[0070] In some non-limiting embodiments, the strain part 20 may further include a through hole 27. The through hole 27 is provided at the second end 22. The through hole 27 penetrates the second end 22, and the extending direction of the through hole 27 is the same as the extending direction of the cavity 26. The through hole 27 provided at the second end 22 helps to further improve the ease of strain of the strain part 20, so that the strain part 20 is more prone to strain under the action of a contact force.

[0071] Since the contact force detection device 100 is usually exposed to the external environment during train operation, the contact force detection device 100 is inevitably affected by external dust. In addition, when a carbon slide plate is used, during the operation of the pantograph, carbon powder and copper shavings generated by the moving friction between the carbon slide plate and the catenary may affect the normal operation of the contact force detection device 100, especially the normal operation of the strain detection member 30.

[0072] In some embodiments of the present invention, in combination with Figure 1 , Figure 2 , Figure 8 and Figure 9 , the contact force detection device 100 may further include a protective cover 50, and the protective cover 50 covers a part of the outer surface of the strain part 20 to isolate the strain detection member 30 from being exposed to the outside.

[0073] Furthermore, in order to prevent the protective cover 50 from falling off during use, the protective cover 50 may be connected to the force-receiving part 10. For the convenience of installation, disassembly, etc. of the strain detection member 30, the protective cover 50 is detachably connected to the force-receiving part 10. It can be understood that the protective cover 50 may also be connected to the strain part 20 or a suitable position in the contact force detection device 100.

[0074] In some non-limiting embodiments, taking the protective cover 50 connected to the force-receiving part 10 as an example, the protective cover 50 may include two side walls 51 and a top wall 52. Among them, the two side walls 51 and the top wall 52 may form a generally inverted U-shaped structure. The protective cover 50 is buckled outside the strain part 20, and the top 52 may support on the strain part 20, and the two side walls 51 isolate the strain detection member 30 in the cavity of the U-shaped structure.

[0075] Furthermore, the protective cover 50 may further include a connecting wall 53. A third connecting hole 54 is provided on the connecting part 53. A second connecting hole 15 is provided on the force-receiving column 12. Through the cooperation of the third connecting hole 54 and the second connecting hole 15, auxiliary fasteners can fix the protective cover 50 to the force-receiving part 10. By adopting this connection method, while ensuring the fixation of the protective cover 50, the contact force detection between the pantograph and the catenary is not interfered.

[0076] In specific implementation, the strain detection member 30 may include various implementation manners, as long as it can detect the strain of the strain part 20.

[0077] In some non-limiting embodiments, the strain detection member 30 includes two optical strain gauges 31, and the two optical strain gauges 31 are symmetrically arranged on both side surfaces of the intermediate strain beam 23, and the optical strain gauges 31 are used to detect the strain of the intermediate strain beam 23.

[0078] When the middle strain beam 23 is subjected to a contact force, one side of the two sides of the middle strain beam 23 is compressed and the other side is stretched. One of the two optical strain gauges 31 can detect the compressive strain and the other can detect the tensile strain. The two optical strain gauges 31 simultaneously measure the strains on both sides of the middle strain beam 23. The absolute values of the bending moments detected by the two optical strain gauges 31 are equal but in opposite directions, so that a temperature compensation effect can be achieved. By synthesizing the signals A and B respectively detected by the two optical strain gauges 31, the influences of stress and temperature are cancelled, and at the same time, the bending moment is amplified by 2 times, which helps to improve the accuracy of contact force detection.

[0079] Further, the two optical strain gauges 31 are arranged at a position of the middle strain beam 23 close to the force-receiving part 10. For example, the two optical strain gauges 31 are arranged in an area where the distance from the force-receiving part 10 meets a set threshold value.

[0080] In specific implementation, the two optical strain gauges 31 can be bonded to the middle strain beam 23 by pasting, or can be connected to the middle strain beam 23 by means of screw fastening, embedding, welding, implanting or with the help of an auxiliary fixing structure, etc., and no further examples are given here.

[0081] In some other non-limiting embodiments, the strain detection member 30 includes an optical strain gauge and a temperature compensation gauge. The optical strain gauge is used to detect the strain of the middle strain beam 23, and the temperature compensation gauge is used to detect the strain of the middle strain beam 23 caused by temperature.

[0082] Wherein, the arrangement positions of the optical strain gauge and the temperature compensation gauge on the middle strain beam 23 can be configured according to requirements and are not limited here.

[0083] In specific implementation, the optical strain gauge 31 can include a Micro-Electro-Mechanical System (MEMS) fiber optic sensor, a Micro-Opto-Electro-Mechanical System (MOEMS) fiber optic sensor, a Micro-Opto-Mechanical System (MOMS) fiber optic sensor, etc.

[0084] Taking the MEMS fiber optic sensor as an example, the MEMS fiber optic sensing technology is a cutting-edge technology in the 21st century based on micro / nano mechanics and optics. The mass block, elastic support, optical reflection mirror, and optical incident and exit waveguide systems of this technology are directly integrated on a tiny chip, truly realizing the all-optical detection and transmission of signals such as vibration, pressure, current, and temperature. The manufactured MEMS sensors have the advantages of small size, light weight, easy installation, high sensitivity, dynamic response, passive measurement, and anti-electromagnetic interference.

[0085] The silicon-based sensitive structure of the MEMS chip is integrally manufactured using microelectromechanical technology, and the signals are detected and read using fiber optic detection technology. Thus, it has the common advantages of MEMS sensing technology and fiber optic sensing technology. Moreover, the MEMS fiber optic sensing technology overcomes the mutual restriction between "wideband" and "high precision" of existing sensing technologies. It has the characteristics of being passive, wide-temperature, miniaturized, anti-electromagnetic interference, portable, easy to network, and maintenance-free. Therefore, it can perform long-term accurate measurement, reducing the complexity and cost of the intelligent operation and maintenance system. So, the MEMS fiber optic sensing technology is very suitable for the real-time monitoring of vehicle pantographs, catenaries, and their relationships.

[0086] It should be noted that the MOEMS fiber optic sensor and MOMS fiber optic sensor in the embodiments of the present invention may possess the above advantages of the MEMS fiber optic sensor.

[0087] Since it is helpful for the strain portion 20 to generate strain, the first end 21 of the strain portion 20 is suspended, and the second end 22 of the strain portion 20 is connected to the bow head support portion 40. During use, when the strain portion 20 repeatedly generates strain, it is easy to cause the connection between the second end 22 and the bow head support portion 40 to break, resulting in a drastic change in the relative position between the pantograph and the catenary, or causing the bow head to break. When the connection between the second end 22 and the bow head support portion 40 breaks, in order to avoid a drastic change in the relative position between the pantograph and the catenary, in the embodiments of the present invention, the contact force detection device 100 may further include: a locking component 60, and the locking component 60 is used to connect the strain portion 20 and the bow head support portion 40.

[0088] In a specific implementation, referring to Figure 1 , Figure 2 , Figure 5 , Figure 8 and Figure 9, the latch assembly 60 may include a latch upper ear 61, a latch lower ear 62, and a latch connecting member (not shown in the figure). Among them: the latch upper ear 61 is provided at the second end 22 of the force receiving portion 10 or the strain portion 20; the latch lower ear 62 is provided at the bow head support portion 40; the latch connecting member is used to connect the latch upper ear 61 and the latch lower ear 62, and a natural gap is maintained between the latch upper ear 61 and the latch lower ear 62, and there is no pre-tightening force between the latch upper ear 61 and the latch lower ear 62.

[0089] In some embodiments, the latch connecting member is a bolt or other component that can penetrate the latch upper ear 61 and the latch lower ear 62. Latch connection holes 63 are respectively provided on the latch upper ear 61 and the latch lower ear 62. The latch connecting member passes through the latch connection hole 63 on the latch upper ear 61 and the latch connection hole 63 of the latch lower ear 62 and is locked. So that the latch upper ear 61 and the latch lower ear 62 are in a natural non-loaded state. After being fixed by the latch connecting member, it neither interferes with the normal measurement of the contact force, nor can prevent or slow down the detachment after the bow head breaks or after the break between the strain portion 20 and the bow head support portion 40.

[0090] In some non-limiting embodiments, a skirt 44 may be formed at the edge of the bow head support portion 40, and the latch lower ear 62 is provided on the skirt 44.

[0091] In some embodiments, in order to facilitate the installation of the latch connecting member, an avoidance opening 29 may also be provided at the second end 22 of the strain portion 20.

[0092] In a specific implementation, the strain portion 20 is provided with a tail cable plug 28, and the tail cable plug is used to lead out the tail fiber 32 of the strain detection member 30.

[0093] In a specific implementation, when the types of pantographs are different, the specific structures of the bow head supports in the pantographs are different. The specific structure of the bow head support portion 40 can be configured according to the structure of the bow head support.

[0094] Refer to Figures 1 to 7 , when the contact force detection device 100 is applicable to a leaf spring type pantograph, the bow head support portion 40 includes two relatively arranged bow head support seat ears 42. The bow head support portion 40 straddles the bow head support, and the two bow head support seat ears 42 are respectively connected to the bow head support.

[0095] In a specific implementation, the two bow head support seat ears 42 extend from the strain portion 20 in a direction away from the strain portion 20 and the force receiving portion 10.

[0096] Specifically, each bow head support seat ear 42 may be provided with a fifth connection hole 45 , and the contact force detection device 100 may be connected to the bow head support seat through the fifth connection hole 45 in cooperation with a fastener.

[0097] Reference Figures 8 to 13 When the contact force detection device 100 is applicable to a tension spring type pantograph, the pantograph support portion 40 includes: a support platform 41 extending in a horizontal direction, and the support platform 41 is used to connect the pantograph support.

[0098] Specifically, a fourth connection hole 43 may be provided on the support platform 41 , and the contact force detection device 100 may be connected to the bow head support through the fourth connection hole 43 and a fastener.

[0099] The contact force detection device 100 provided in the embodiment of the present invention can configure the structure and connection method of the force-bearing part 10 in the contact force detection device 100 and the structure and connection method of the bow head support part 40 according to the existing connection method between the pantograph slide plate and the bow head support, without changing the structure of the pantograph. In addition, the contact force detection device 100 can be integrated on the bow head of the pantograph, which can not affect the production, installation and maintenance of the carbon slide plate.

[0100] The embodiment of the present invention also provides a pantograph. Figure 14 , a schematic diagram of a pantograph in an embodiment of the present invention is given. The pantograph 1 includes one or more pantographs. Each pantograph includes a slide plate 2 and a pantograph support 3. The pantograph 1 also includes a contact force detection device 100 provided in any of the above embodiments. The contact force detection device 100 is arranged between the slide plate 2 and the pantograph support 3, and is connected to the slide plate 2 and the pantograph support 3 respectively. In some embodiments, in combination with Figure 2 and Figure 9 A connecting portion 4 may be provided on the slide plate 2 , the force-bearing portion 10 of the contact force detection device 100 is connected to the connecting portion 4 , and the bow head supporting portion 40 in the contact force detection device 100 is connected to the bow head support 3 .

[0101] In a specific implementation, each bow head may include two slide plates 2 and four bow head supports 3, and each two bow head supports 3 may be arranged in pairs on both sides of a single slide plate 2. Each bow head support 3 is correspondingly provided with a contact force detection device 100. The contact force detection device 100 is arranged at both ends of the slide plate 2 to avoid interfering with the contact between the bow and the catenary. It should be pointed out that for the convenience of description, Figure 14The pantograph in [it] takes a pantograph head as an example, and a schematic diagram is made taking a slide plate 2 and two pantograph head supports 3 in the pantograph head as examples. It can be understood that the number of pantograph heads included in the pantograph 1 is not limited to this, and the number of slide plates 2 and pantograph head supports 3 included in the pantograph head is not limited to this either. The pantograph head may further include other numbers of slide plates 2 and pantograph head supports 3. The embodiments of the present invention do not limit the number and positional relationship of the slide plate 2 and the pantograph head supports 3.

[0102] In a specific implementation, a connecting portion 4 may be provided on the slide plate 2, and the contact force detection device 100 is connected to the connecting portion 4 and the pantograph head support 3 to realize the connection between the slide plate 2 and the pantograph head support 3.

[0103] It can be understood that the pantograph may further include components such as a chassis, a lifting device, a connecting rod assembly, and some necessary controllers, which will not be described in detail here.

[0104] In a specific implementation, for the specific structure of the contact force detection device and the connection between the contact force detection device and the pantograph, reference may be made to the description of the contact force detection device provided in the above embodiments, which will not be elaborated here.

[0105] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. A contact force detection device, characterized in that, For detecting the contact force between the pantograph and the catenary, the pantograph includes one or more bow heads, each bow head including a sliding plate and a bow head support connected to both ends of the sliding plate, and the contact force detecting device includes: A force-receiving part for connecting one end of the sliding plate to conduct the contact force between the sliding plate and the catenary; A strain part, the first end of the strain part is connected to the force-receiving part, and the first end of the strain part is suspended to undergo strain under the action of the contact force; A strain detecting member disposed on the strain part for detecting the strain of the strain part; A bow head support part connected to the second end of the strain part and the bow head support; The force-receiving part includes a force-receiving platform and a force-receiving column, wherein, The force-receiving platform is used for connecting one end of the sliding plate; All the force-receiving columns are connected to the first end of the strain part and the force-receiving platform; The strain part includes an intermediate strain beam connected to the force-receiving part, and the intermediate strain beam is used for undergoing strain under the action of the contact force; The strain detecting member is disposed on the intermediate strain beam; The strain part includes an upper strain beam above the intermediate strain beam and / or a lower strain beam below the intermediate strain beam. There is a cavity between the upper strain beam and the intermediate strain beam, and there is a cavity between the lower strain beam and the intermediate strain beam; A through hole is provided at the second end of the strain part, the through hole penetrates the second end of the strain part, and the extending direction of the through hole is the same as the extending direction of the cavity.

2. The contact force detection device according to claim 1, characterized in that, The force-receiving part includes a bent limiting part for limiting the movement of the sliding plate relative to the contact force detecting device.

3. The contact force detection device according to claim 1, wherein, From the end connected to the force-receiving part to the direction away from the force-receiving part, the thickness of the intermediate strain beam gradually decreases.

4. The contact force detection device according to any one of claims 1, characterized in that, It further includes a protective cover that covers a part of the outer surface of the strain part to isolate the strain detecting member from being exposed to the outside.

5. The contact force detection device according to claim 1, wherein, The strain detecting member includes two optical strain gauges symmetrically disposed on both side surfaces of the intermediate strain beam, and the optical strain gauges are used for detecting the strain of the intermediate strain beam.

6. The contact force detection device according to claim 5, characterized in that, The two optical strain gauges are disposed at a position of the intermediate strain beam close to the force-receiving part.

7. The contact force detection device according to claim 1, wherein The strain detecting member includes an optical strain gauge and a temperature compensation piece. The optical strain gauge is used for detecting the strain of the intermediate strain beam, and the temperature compensation piece is used for detecting the strain of the intermediate strain beam caused by temperature.

8. The contact force detection device according to claim 1, wherein It further includes: A latch assembly for connecting the strain part and the bow head support part.

9. The contact force detection device according to claim 8, wherein, The latch assembly includes a latch upper ear, a latch lower ear and a latch connecting piece, wherein: The latch upper ear is disposed at the force-receiving part or the second end of the strain part; The latch lower ear is disposed at the bow head support part; The latch connecting piece is used for connecting the latch upper ear and the latch lower ear, and a natural gap is maintained between the latch upper ear and the latch lower ear.

10. The contact force detection device according to claim 1, wherein, A tail cable plug is provided at the strain part for leading out the tail fiber of the strain detecting member.

11. The contact force detection device according to claim 1, wherein, The bow head support part includes: A support platform extending in the horizontal direction, the support platform being used to connect the bow head support; Alternatively, the bow head support portion includes two bow head support seat ears disposed opposite to each other, the bow head support portion straddling the bow head support, and the two bow head support seat ears are respectively connected to the bow head support.

12. The contact force detection device according to claim 11, characterized in that, The two bow head support seat ears are formed by extending from the strain portion in a direction away from the strain portion and the force receiving portion.

13. A pantograph, characterized in that, Comprising: One or more bow heads, further comprising the contact force detection device according to any one of claims 1 to 12, the contact force detection device being disposed between the skateboard and the bow head support and respectively connected to the skateboard and the bow head support.

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