CN-121973637-A - Leaf spring type pantograph monitoring device, leaf spring type pantograph applied to leaf spring type pantograph monitoring device and leaf spring type pantograph monitoring method

CN121973637ACN 121973637 ACN121973637 ACN 121973637ACN-121973637-A

Abstract

The invention discloses a plate spring type pantograph monitoring device, a plate spring type pantograph applied to the plate spring type pantograph monitoring device and a plate spring type pantograph monitoring method, and relates to the technical field of detection. A plate spring type pantograph monitoring device comprises a sensor assembly, wherein the sensor assembly is arranged on a left plate spring and a right plate spring and comprises at least 12 sensors. The leaf spring type pantograph monitoring device is characterized in that sensor assemblies are arranged on the left leaf spring and the right leaf spring to measure contact force, the leaf spring is a long-term use accessory, the leaf spring can be replaced only when a vehicle is in maintenance, the technical requirement of long-term monitoring and non-replacement can be met, the influence caused by zero drift is removed through the combination of a plurality of strain sensors and a positive and negative group bridge algorithm, the leaf spring type pantograph monitoring device can be used for a long time, calibration is not needed, meanwhile, the redundancy of the monitoring device is improved, the sensors are installed at the non-stress position, the temperature compensation effect is achieved, and the measuring precision and reliability are further improved.

Inventors

CHU HONGFEI
ZHANG XING
SU LIBO
LI JIN
XIONG DEWEI
LI HUAQUAN

Assignees

合肥中车轨道交通车辆有限公司
徐州轨道交通运营有限公司

Dates

Publication Date: 20260505
Application Date: 20260212

Claims (13)

1. The utility model provides a leaf spring type pantograph's monitoring devices, is applicable to leaf spring type pantograph, its characterized in that, leaf spring type pantograph includes preceding slide (1), back slide (2), left leaf spring (3), right leaf spring (4), preceding slide (1) and back slide (2) are fixed on left leaf spring (3) and right leaf spring (4) for contact with the bow net and supply power for the vehicle, left leaf spring (3) and right leaf spring (4) are by upper plate (31), lower plate and first arc (32) of connecting upper plate (31) and lower plate, second arc (33) are constituteed to form the symmetrical structure about the central line of left leaf spring (3) and right leaf spring (4); The monitoring device further comprises a sensor assembly, the sensor assembly is arranged on the left plate spring (3) and the right plate spring (4), the sensor assembly comprises at least 12 sensors, a first sensor (7) and a fourth sensor (8) are arranged on an upper plate (31) of the left plate spring (3), a second sensor (5) is arranged on the outer side of a first arc-shaped plate (32) of the left plate spring (3), a third sensor (6) is arranged on the inner side of the first arc-shaped plate (32) corresponding to the second sensor (5), a fifth sensor (9) is arranged on the inner side of a second arc-shaped plate (33) of the left plate spring (3), a sixth sensor (10) is arranged on the outer side of the second arc-shaped plate (33) corresponding to the fifth sensor (9), and the arrangement position of the sensor assembly is symmetrical with respect to the central line; The upper plate (31) of right leaf spring (4) is provided with seven (13) and ten (14) of sensor, the outside of the first arc (32) of right leaf spring (4) is provided with eight (11) of sensor, and the outside of first arc (32) corresponding to eight (11) of this sensor is provided with nine (12) of sensor, the inboard of the second arc (33) of right leaf spring (4) is provided with eleven (15) of sensor, and the outside of the second arc (33) corresponding to eleven (15) of this sensor is provided with twelve (16) of sensor, the setting position of sensor subassembly is with the central line symmetry.
2. The plate spring type pantograph monitoring device according to claim 1, wherein the first sensor (7), the fourth sensor (8), the seventh sensor (13) and the tenth sensor (14) are provided on a bottom surface corresponding to the upper plate (31).
3. The monitoring device of a leaf spring type pantograph as set forth in claim 2, wherein the second sensor (5) and the third sensor (6) are disposed at the maximum deformation position of the first arc plate (32) of the left leaf spring (3), and the eighth sensor (11) and the ninth sensor (12) are disposed at the maximum deformation position of the first arc plate (32) of the left leaf spring (3).
4. A monitoring device for a leaf spring type pantograph as set forth in claim 3, wherein the deformation maximum position is above the intermediate position of the first arcuate plate (32).
5. The leaf spring pantograph monitoring device of claim 1, wherein the sensor in the sensor assembly is an optical MEMS sensor.
6. The monitoring device of a leaf spring type pantograph as set forth in claim 1, wherein the sensor assembly of the left leaf spring (3) is connected to the optical fiber sensing analyzer through one junction box, and the sensor assembly of the right leaf spring (4) is connected to the optical fiber sensing analyzer through the other junction box.
7. A leaf spring type pantograph, characterized by comprising a front sliding plate (1), a rear sliding plate (2), a left leaf spring (3) and a right leaf spring (4), wherein the front sliding plate (1) and the rear sliding plate (2) are fixed on the left leaf spring (3) and the right leaf spring (4) and are used for being contacted with a bow net to supply power for a vehicle, and a monitoring device as claimed in any one of claims 1-6 is connected.
8. A method of monitoring a leaf spring type pantograph as set forth in claim 7, comprising the steps of: s1, calculating a first contact force and a third contact force of a front sliding plate (1), and a second contact force and a fourth contact force of a rear sliding plate (2); s2, calculating the pull-out values of the front sliding plate (1) and the rear sliding plate (2) according to the first contact force, the second contact force, the third contact force and the fourth contact force; s3, comparing the pull-out value of the front sliding plate (1) or the rear sliding plate (2) with the design range of the pull-out value, and judging whether the sliding plate is abnormal or not.
9. The monitoring method according to claim 8, wherein before S1, the sensor assembly is mounted on the left and right leaf springs (4) and calibrated by coefficients, and after calibration, a coefficient matrix of each sensor is obtained, and the sensor measurement wavelength data is converted into contact force data by coefficients.
10. The monitoring method of claim 8, wherein the first contact force data is calculated by measuring wavelength data from sensor one (7), sensor two (5), and sensor three (6); the second contact force data can be calculated by measuring wavelength data by the sensor IV (8), the sensor V (9) and the sensor VI (10); Third contact force data can be calculated through measuring wavelength data by a sensor seven (13), a sensor eight (11) and a sensor nine (12); the fourth contact force data can be calculated by measuring wavelength data through a sensor ten (14), a sensor eleven (15) and a sensor twelve (16); The first contact force, the second contact force, the third contact force and the fourth contact force are calculated as follows: ; Wherein F 1 、F 2 is the first contact force data and the second contact force data of the left plate spring (3) respectively, and F 3 、F 4 is the third contact force data and the fourth contact force data of the right plate spring (4) respectively; 1 、k 2 、k 3 、k 4 、k 5 、k 6 、 7 、k 8 、k 9 、k 10 、k 11 、k 12 Coefficients of sensor one (7) to sensor twelve (16) of the left leaf spring (3), respectively; λ 1 ,λ 2 ,λ 3 ,λ 4 ,λ 5 ,λ 6 ,λ 7 ,λ 8 ,λ 9 ,λ 10 ,λ 11 ,λ 12 The measurement wavelengths of sensor one (7) to sensor twelve (16), respectively.
11. The monitoring method of claim 10, wherein in S2, the optical fiber sensing analyzer samples at a sampling frequency of 1000Hz, i.e. each sensor of 1 second type uploads 1000 wavelength data to the optical fiber sensing analyzer, and the wavelength matrix received by the optical fiber sensing analyzer is the matrix : ; Where lambda 1 is the wavelength data of sensor one (7), lambda 1-1 is the wavelength data of the first point of sensor one (7), and so on, lambda 1-i is the wavelength data of the i-th point of sensor one (7); the wavelength matrix of the ith point can be obtained by substituting the wavelength matrix into the calculation formula of the contact force as follows: ; Where F 1-i ...F 4-i is the data of the contact force F 1 ...F 4 at i points.
12. The monitoring method of claim 11, wherein the aggregate value is calculated at 50 points, the extremum is removed from the 50 points using a statistical thresholding based method, and then the data is averaged to distribute the 50 points.
13. The monitoring method according to claim 8, wherein a pull-out value is calculated from the obtained first contact force, second contact force, third contact force and fourth contact force, the pull-out value being a distance of the contact net (17) from a central axis of the pantograph, the pull-out value being calculated as follows: 、 ; In the above, L 1 and L 2 are respectively the pull-out value of the front sliding plate (1) and the pull-out value of the rear sliding plate (2), the lengths of the front sliding plate (1) and the rear sliding plate (2) are L, and f 1 、f 2 is respectively the pull-out coefficient of the front sliding plate (1) and the pull-out coefficient of the rear sliding plate (2), and the coefficients are between 0.6 and 1.

Description

Leaf spring type pantograph monitoring device, leaf spring type pantograph applied to leaf spring type pantograph monitoring device and leaf spring type pantograph monitoring method Technical Field The invention relates to the technical field of detection, in particular to a plate spring type pantograph monitoring device, a plate spring type pantograph applied to the plate spring type pantograph monitoring device and a plate spring type pantograph monitoring method. Background The pantograph is used for supplying power to railway vehicles, and the leaf spring type pantograph has large-scale application in the rail transit industry due to the characteristics of light weight, convenient installation and the like. The current measurement of the contact force of the leaf spring type pantograph is mainly divided into strain type measurement and optical fiber interference cavity type measurement, wherein the strain type measurement mainly comprises the steps of pasting an optical fiber strain gauge on the pantograph and realizing the measurement of the contact force through strain, and the optical fiber interference cavity type measurement mainly comprises the steps of changing the structure of a pantograph head, adding an optical fiber interference cavity type sensor in the optical fiber interference cavity type sensor and realizing the measurement of the contact force through the change of the cavity length of an interference cavity. The interference cavity type measurement needs to change the structure of the pantograph head, and in the plate spring type pantograph, a connecting piece of the pantograph head and the plate spring is mainly modified into a pressure sensor, so that the weight of the pantograph head can be increased by more than 2kg, and the running posture of the pantograph is influenced. Strain gauge measurements require a pantograph mounting location, with different mounting locations and with completely different calculation algorithms. According to the optical fiber strain type contact force measuring method adopted in the prior art, the installation position of the optical fiber strain gauge is positioned on the carbon slide plate of the pantograph, the carbon slide plate is a vulnerable part, a line which is normally well operated needs to be replaced every year, and the abnormally worn line needs to be replaced once in 2-3 months. Therefore, the scheme provided by the prior art is equivalent to that the optical fiber strain gauge needs to be replaced for a period of time and is calibrated on site, the cost of manpower and material resources is high, the optical fiber strain gauge can only be used for testing, and the optical fiber strain gauge cannot be used as a long-term monitoring scheme. In the prior art, 4 strain gages are generally adopted to measure the contact force, only temperature compensation is realized, zero drift can be generated in the long-term use process of the optical fiber strain gages, and the measurement accuracy can be continuously reduced. Disclosure of Invention The invention provides a plate spring type pantograph monitoring device, a plate spring type pantograph applied to the plate spring type pantograph monitoring device and a plate spring type pantograph monitoring method, which can solve the problems that in the prior art, the operation posture of the pantograph is poor, a sensor is frequently replaced and calibrated, long-term monitoring is difficult, and the measurement precision is reduced due to zero drift. The monitoring device of the leaf spring type pantograph is suitable for the leaf spring type pantograph, and comprises a front sliding plate, a rear sliding plate, a left leaf spring and a right leaf spring, wherein the front sliding plate and the rear sliding plate are fixed on the left leaf spring and the right leaf spring and are used for being contacted with a pantograph net to supply power for a vehicle; The monitoring device further comprises a sensor assembly, the sensor assembly is arranged on the left plate spring and the right plate spring, the sensor assembly comprises at least 12 sensors, a first sensor and a fourth sensor are arranged on the upper plate of the left plate spring, a second sensor is arranged on the outer side of a first arc-shaped plate of the left plate spring, a third sensor is arranged on the inner side of a first arc-shaped plate corresponding to the second sensor, a fifth sensor is arranged on the inner side of a second arc-shaped plate of the left plate spring, a sixth sensor is arranged on the outer side of a second arc-shaped plate corresponding to the fifth sensor, and the arrangement positions of the sensor assembly are symmetrical with respect to the central line; The upper plate of the right plate spring is provided with a sensor seven and a sensor ten, the outer side of a first arc-shaped plate of the right plate spring is provided with a sensor eight, the outer side of the first arc-shaped plate corresponding