Qualification evaluation equipment for catenary hard point detection system
By calibrating the acceleration sensor of the contact wire hard point detection system using a free-fall impact device and a data acquisition system, the inaccuracy and instability of the hammer impact test method are solved, achieving efficient and accurate hard point calibration. The system is simple, environmentally friendly, and low in cost.
Patent Information
- Application Number
- CN202520136080.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-21
AI Technical Summary
In the existing contact wire hard point testing, the hammer impact test method has problems with inaccurate and unstable test results. Moreover, the hammer energy applied to a certain point for a short time can easily cause overload or local response, making it difficult to meet the frequency response test requirements of different test pieces.
By employing manual height lifting and free fall, a low-range impact acceleration is generated through free fall impact. A standard accelerometer is used to perform precise and controllable calibration of the accelerometer to be calibrated, replacing the traditional hammer impact test method.
It improves the flexibility and efficiency of testing, ensures the accuracy and stability of test results, has a simple structure, is easy to operate, has low cost, allows for high testing frequency and convenient maintenance, and is environmentally friendly as it requires no power source.
Smart Images
Figure CN223756769U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of contact net hard point evaluation, especially relates to a qualified evaluation equipment for contact net hard point detection system. BACKGROUND
[0002] Currently, the impact excitation device is used for contact net hard point evaluation, and the acceleration sensor thereon is tested and calibrated by using the force hammer knocking test method. The hammering test mainly provides two test methods: fixed knocking point and moving response point and fixed response point and moving knocking point. However, the hammering test has the following disadvantages: the hammering energy is short and acts on a certain point, which easily causes overload or local response problem, and even causes nonlinear problem. In addition, different frequency response test ranges are required for different test samples, and the force used for each hammering is inconsistent, so the obtained frequency spectrum may not be the required frequency response test range.
[0003] Therefore, the utility model provides a qualified evaluation equipment for contact net hard point detection system by using the impact comparison method, which solves the problems in the evaluation test by using the force hammer knocking test method. SUMMARY
[0004] The utility model aims at providing a qualified evaluation equipment for contact net hard point detection system, which uses manual height lifting and free fall mode to improve the flexibility of the test and the efficiency of the hard point evaluation test, so as to solve the problem of inaccurate and unstable test results in the force hammer knocking test method.
[0005] The above technical purpose of the utility model is mainly realized by the following technical scheme:
[0006] The utility model provides a qualified evaluation equipment for contact net hard point detection system, which realizes the calibration of the to-be-calibrated acceleration sensor in the contact net hard point detection system, and the qualified evaluation equipment comprises an impact device and a data acquisition device.
[0007] The impact device comprises:
[0008] a base;
[0009] a guide rail arranged above the base and arranged in the vertical direction;
[0010] a sliding block slidingly connected to the guide rail, wherein the sliding block is provided with an impact hammer and a standard acceleration sensor, and the to-be-calibrated acceleration sensor is arranged on the sliding block;
[0011] The data acquisition device is electrically connected with the standard acceleration sensor and the acceleration sensor to be calibrated to acquire test data of the standard acceleration sensor and the acceleration sensor to be calibrated when the impact device is performing an impact test.
[0012] The qualified evaluation equipment for the overhead line hard point detection system generates low-range impact acceleration through free fall impact, compares and calibrates the acceleration sensor to be calibrated by using the standard acceleration sensor as a standard, and can accurately and controllably calibrate the impact sensitivity of the acceleration sensor to be calibrated.
[0013] In a preferred embodiment of the utility model, the impact device further comprises a bracket arranged on the base, the bracket is arranged along the vertical direction and is fixedly connected with the guide rail.
[0014] In the embodiment, the guide rail is fixed on the base through the bracket to improve the structural strength of the guide rail, ensure the stability of the guide rail during the test, and further improve the accuracy of the test result.
[0015] In a preferred embodiment of the utility model, a scale part for displaying the falling height of the impact hammer is arranged on the guide rail.
[0016] In the embodiment, the height value of the impact hammer after lifting can be read according to the scale part, and the height value of the impact hammer is adjusted according to the test requirement, so that the impact strength is controlled.
[0017] In a preferred embodiment of the utility model, a connecting piece is fixedly connected with the sliding block, the connecting piece has a vertical part and a horizontal part connected with each other, the vertical part is connected with the sliding block, the upper end surface of the horizontal part is provided with the standard acceleration sensor and the acceleration sensor to be calibrated, and the lower end surface of the horizontal part is provided with the impact hammer.
[0018] In the embodiment, the standard acceleration sensor, the acceleration sensor to be calibrated and the impact hammer are fixedly connected on the sliding block through the connecting piece, so that the installation and position adjustment of the above components are facilitated.
[0019] In a preferred embodiment of the utility model, the impact device further comprises an impact anvil arranged on the base, and the impact hammer and the impact anvil are arranged oppositely.
[0020] In the embodiment, the impact anvil can buffer the impact force of the impact hammer on the base, thereby protecting the base and prolonging the service life of the base.
[0021] In a preferred embodiment of the present application, the standard acceleration sensor and the acceleration sensor to be calibrated are connected through a connecting tool, and the standard acceleration sensor is fixedly connected to the upper end surface of the horizontal part.
[0022] In the embodiment, the standard acceleration sensor and the acceleration sensor to be calibrated are fixedly connected together, so that they can be subjected to the impact test in the same motion state, thereby improving the accuracy of calibration.
[0023] In a preferred embodiment of the present application, the cross section of the guide rail is circular.
[0024] In the embodiment, the guide rail is a straight optical axis cylindrical slide rail, the slider runs smoothly and fast, the impact hammer can be manually lifted conveniently, and the impact hammer can be ensured to freely fall down smoothly to complete the impact test.
[0025] In a preferred embodiment of the present application, the lower end surface of the base is provided with a plurality of adjustable buffer feet.
[0026] In the embodiment, the buffer effect of the adjustable buffer feet at the bottom of the base effectively reduces the damage of the impact test to the floor.
[0027] In a preferred embodiment of the present application, the adjustable buffer feet are rubber pads, and the rubber pads are connected to the base in a threaded manner through bolts.
[0028] In the embodiment, the rubber pad has good elasticity and good buffer effect, and the levelness of the base can be adjusted by rotating the rubber pad, so that the guide rail is arranged in the vertical direction, thereby ensuring that the impact hammer freely falls down smoothly.
[0029] In a preferred embodiment of the present application, the base is a square seat, and each corner of the square seat is provided with one rubber pad. BRIEF DESCRIPTION OF DRAWINGS
[0030] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor. In the drawings:
[0031] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes and proportions of the components in the drawings are only illustrative and are used to help understand the present disclosure, and are not specific limitations on the shapes and proportions of the components of the present disclosure. Those skilled in the art can select various possible shapes and proportions to implement the present disclosure according to specific circumstances under the guidance of the present disclosure.
[0032] Figure 1 A structure diagram of the impact device according to the present disclosure;
[0033] Figure 2 A connection structure diagram of the standard acceleration sensor and the acceleration sensor to be calibrated according to the present disclosure;
[0034] Figure 3 A structure diagram of the connecting tool according to the present disclosure;
[0035] Figure 4 A connection structure diagram of the connecting piece and the impact hammer according to the present disclosure;
[0036] Figure 5 A structure diagram of the impact hammer according to the present disclosure.
[0037] Explanation of reference signs:
[0038] 10, base; 11, support; 12, impact anvil; 13, adjustable buffer foot;
[0039] 20, guide rail; 21, scale part; 22, sliding block;
[0040] 30, connecting piece; 31, vertical part; 32, horizontal part;
[0041] 40, standard acceleration sensor; 41, acceleration sensor to be calibrated; 42, connecting tool;
[0042] 50, impact hammer. DETAILED DESCRIPTION
[0043] In order for those skilled in the art to better understand the technical solutions in the present disclosure, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, not all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present disclosure.
[0044] It is to be understood that when an element such as a layer, region or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In addition, it is to be understood that when a layer is referred to as being "connected", "coupled" or "supported" to another layer, it can be directly connected, coupled or supported to the other layer, or intervening layers can also be present. As used herein, the term "vertical", "horizontal", "left", "right", and the like, are merely used for the purpose of illustration and are not intended to be limiting.
[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0046] As shown in Figures 1 to 5 The utility model provides a kind of qualified evaluation equipment for overhead line hard point detection system, realize the calibration of the acceleration sensor 41 to be calibrated in overhead line hard point detection system, and the qualified evaluation equipment includes impact device and data acquisition device;The impact device includes pedestal 10, guide rail 20 and sliding block 22, guide rail 20 is located above pedestal 10, and guide rail 20 is arranged along vertical direction, and sliding block 22 is slidably connected on guide rail 20, and impact hammer 50 and standard acceleration sensor 40 are arranged on sliding block 22, and the acceleration sensor 41 to be calibrated is also arranged on sliding block 22;Data acquisition device is electrically connected with standard acceleration sensor 40 and the acceleration sensor 41 to be calibrated, to obtain the test data of standard acceleration sensor 40 and the acceleration sensor 41 to be calibrated when impact device carries out impact test.
[0047] The qualified evaluation equipment for overhead line hard point detection system, by free-fall impact, generates low-range impact acceleration, uses standard acceleration sensor 40 as standard to compare and calibrate the acceleration sensor 41 to be calibrated, and the impact sensitivity of the acceleration sensor 41 to be calibrated can be accurately and controllably calibrated.The qualified evaluation equipment is used to replace the force hammer knocking test method in the prior art, without any power source in test process, and it is environment-friendly and high in test efficiency;Meanwhile, the qualified evaluation equipment is simple in structure, convenient to operate, low in cost, high in test frequency and convenient to maintain.
[0048] The specific structure of each part of the qualified evaluation equipment for overhead line hard point detection system and the position and connection relationship between parts will be described in detail below.
[0049] The conformity assessment equipment described in this utility model consists of two parts: an impact device and a data acquisition device. The impact device is used to complete the impact test to assess the accelerometer sensor, and the data acquisition device is connected to the accelerometer sensor to collect and analyze data during the impact test.
[0050] The impact device includes a base 10, a guide rail 20, and a slider 22. For example... Figure 1 As shown, the base 10 serves as the foundation for the impact device, which is placed on the ground via the base 10. The guide rail 20 is vertically positioned above the base 10, and its bottom can be directly fixed to the upper surface of the base 10. A slider 22, which can slide vertically up and down, is attached to the guide rail 20. An impact hammer 50 is connected to the slider 22, which is vertically downward. A standard acceleration sensor 40 and an acceleration sensor 41 to be calibrated are also connected to the slider 22.
[0051] The data acquisition device includes a computer and a human-computer interaction interface. The computer is electrically connected to the standard accelerometer 40 and the accelerometer 41 to be calibrated on the impact device via wires, thereby enabling real-time acquisition of data from the standard accelerometer 40 and the accelerometer 41 to be calibrated during the impact test. The human-computer interaction interface can display the test data acquired by the computer in real time for the test personnel to view and analyze. At the same time, the standard accelerometer 40 is used as standard data to compare and calibrate the accuracy of the accelerometer 41 to be calibrated.
[0052] The structure and technical effects of the preferred embodiment of the impact device of this utility model will be described in detail below.
[0053] According to one embodiment of the present invention, such as Figure 1 As shown, the impact device also includes a bracket 11 mounted on the base 10. The bracket 11 is vertically oriented and fixedly connected to the guide rail 20. The bracket 11 and the guide rail 20 are parallel to each other and both are vertically oriented. The bottom of the bracket 11 is fixed to the upper surface of the base 10. While the bottom of the guide rail 20 is fixed to the upper surface of the base 10, the guide rail 20 is also fixedly connected to the bracket 11 to improve the structural strength of the guide rail 20, ensure the stability of the guide rail 20 during the test, and thus improve the accuracy of the test results.
[0054] According to one embodiment of the present invention, such as Figure 1 As shown, the guide rail 20 is provided with a scale 21 for displaying the falling height of the impact hammer 50. The height value of the impact hammer 50 after being lifted can be read from the scale 21, and then the height value of the impact hammer 50 can be adjusted according to the test requirements to control the impact force.
[0055] According to one embodiment of the utility model, as shown in Figure 1 and Figure 4 , the connecting piece 30 is fixedly connected with the slider 22, the connecting piece 30 has the vertical part 31 and the horizontal part 32 connected, the vertical part 31 is fixedly connected with the slider 22, the upper end surface of the horizontal part 32 is equipped with the standard acceleration sensor 40 and the acceleration sensor to be calibrated 41, and the lower end surface of the horizontal part 32 is equipped with the impact hammer 50. The standard acceleration sensor 40, the acceleration sensor to be calibrated 41 and the impact hammer 50 are fixedly connected on the slider 22 through the connecting piece 30, so that the installation and position adjustment of the above-mentioned components are facilitated.
[0056] Specifically, as shown in Figure 1 , Figure 4 and Figure 5 , the vertical part 31 of the connecting piece 30 is connected with the slider 22 through a screw, and the impact hammer 50 is also connected with the horizontal part 32 of the connecting piece 30 through a screw.
[0057] Further, as shown in Figures 1 to 3 , the standard acceleration sensor 40 and the acceleration sensor to be calibrated 41 are connected through a connecting tool 42, and the standard acceleration sensor 40 is fixedly connected on the upper end surface of the horizontal part 32. The standard acceleration sensor 40 and the acceleration sensor to be calibrated 41 are fixedly connected together, so that the two can be subjected to impact test in the same motion state, and the calibration accuracy is improved.
[0058] Specifically, as shown in Figures 1 to 3 , the standard acceleration sensor 40 is detachably installed on the upper end surface of the horizontal part 32 of the connecting piece 30, and the connecting tool 42 is detachably installed above the standard acceleration sensor 40, and the acceleration sensor to be calibrated 41 is detachably installed above the connecting tool 42 through a screw.
[0059] According to one embodiment of the utility model, as shown in Figure 1 , the impact device further comprises an impact anvil 12 arranged on the base 10, and the impact hammer 50 is arranged opposite to the impact anvil 12; during the impact test, the impact hammer 50 falling in the vertical direction hits on the impact anvil 12. The impact anvil 12 can buffer the impact force of the impact hammer 50 on the base 10, so as to protect the base 10 and prolong the service life of the base 10.
[0060] According to one embodiment of the utility model, as shown in Figure 1 , the cross section of the guide rail 20 is circular; the guide rail 20 adopts a linear optical axis cylindrical slide rail, the slider 22 runs smoothly and fast, the impact hammer 50 is conveniently manually lifted, and the impact hammer 50 is ensured to smoothly and freely fall down to complete the impact test.
[0061] According to one embodiment of the utility model, as shown inFigure 1 As shown in the figure, the lower end surface of the base 10 is provided with a plurality of adjustable buffer feet 13; the buffer effect of the adjustable buffer feet 13 effectively reduces the damage of the impact test to the floor.
[0062] Specifically, the adjustable buffer feet 13 are rubber pads, which are threadedly connected with the base 10 through bolts; the rubber pads have good elasticity and good buffer effect, and the levelness of the base 10 can be adjusted by rotating the rubber pads, so that the guide rail 20 is arranged in the vertical direction, and then the impact hammer 50 is ensured to freely fall smoothly.
[0063] Further, as shown in the figure, Figure 1 The base 10 is a square seat, and a rubber pad is detachably threadedly connected at each corner of the square seat.
[0064] The above specific embodiments further specifically describe the purpose, technical scheme and beneficial effects of the utility model, and it should be understood that the above description is only for specific embodiments of the utility model and is not used to limit the protection scope of the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A qualification device for an overhead line hard point detection system, which realizes calibration of a to-be-calibrated acceleration sensor (41) in the overhead line hard point detection system, characterized in that, The qualification evaluation device comprises an impact device and a data acquisition device; The impact device comprises: a base (10); a guide rail (20) arranged above the base (10) and arranged in a vertical direction; a sliding block (22) slidingly connected to the guide rail (20), wherein an impact hammer (50) and a standard acceleration sensor (40) are arranged on the sliding block (22), and a to-be-calibrated acceleration sensor (41) is arranged on the sliding block (22); the data acquisition device is electrically connected with the standard acceleration sensor (40) and the to-be-calibrated acceleration sensor (41) to acquire test data of the standard acceleration sensor (40) and the to-be-calibrated acceleration sensor (41) when the impact device performs an impact test.
2. The qualification device for the overhead line system hard point detection system according to claim 1, characterized in that, The impact device further comprises a support (11) arranged on the base (10), wherein the support (11) is arranged in a vertical direction and is fixedly connected with the guide rail (20).
3. The qualification device for the overhead line system hard point detection system according to claim 1 or 2, characterized in that, A scale part (21) for displaying a falling height of the impact hammer (50) is arranged on the guide rail (20).
4. The qualification device for the overhead line system hard point detection system according to claim 1, characterized in that, The sliding block (22) is fixedly connected with a connecting piece (30), wherein the connecting piece (30) has a vertical part (31) and a horizontal part (32) connected with each other, the vertical part (31) is connected with the sliding block (22), an upper end surface of the horizontal part (32) is provided with the standard acceleration sensor (40) and the to-be-calibrated acceleration sensor (41), and a lower end surface of the horizontal part (32) is provided with the impact hammer (50).
5. The qualification device for the overhead line system hard point detection system according to claim 1 or 4, characterized in that, The impact device further comprises an impact anvil (12) arranged on the base (10), wherein the impact hammer (50) and the impact anvil (12) are arranged oppositely in a vertical direction.
6. The qualification device for the overhead line system hard point detection system according to claim 4, characterized in that, The standard acceleration sensor (40) and the to-be-calibrated acceleration sensor (41) are connected through a connecting tool (42), and the standard acceleration sensor (40) is fixedly connected to the upper end surface of the horizontal part (32).
7. The qualification device for the overhead line system hard point detection system according to claim 1, characterized in that, A cross section of the guide rail (20) is circular.
8. The qualification device for the overhead line system hard point detection system according to claim 1, characterized in that, A plurality of adjustable buffer feet (13) are arranged on a lower end surface of the base (10).
9. The qualification device for the overhead line system hard point detection system according to claim 8, characterized in that, The adjustable buffer feet (13) are rubber pads, and the rubber pads are threadedly connected with the base (10) through bolts.
10. The qualification device for the overhead line system hard point detection system according to claim 9, characterized in that, The base (10) is a square base, and one rubber pad is arranged at each corner of the square base.