CN207556715U - A kind of bow net contact force measuring device - Google Patents
A kind of bow net contact force measuring device Download PDFInfo
- Publication number
- CN207556715U CN207556715U CN201721273665.5U CN201721273665U CN207556715U CN 207556715 U CN207556715 U CN 207556715U CN 201721273665 U CN201721273665 U CN 201721273665U CN 207556715 U CN207556715 U CN 207556715U
- Authority
- CN
- China
- Prior art keywords
- contact force
- bow
- pantograph
- strain
- measuring device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The utility model discloses a kind of bow net contact force measuring devices, belong to electrification railway contact net security technology area.Its basic thought is that pantograph collector head is considered as beam model, establishes correspondence between bow head strain and contact force；According to bow head slide plate due to bow net dynamic interaction the strain generated and acceleration information, obtain real-time bow net dynamic contact force and stagger.The device includes sensor unit, signal gathering unit and data processing unit.The utility model measures the strain of bow head to obtain contact force, and the variable being related to is few, reduces the error generated by intermediate variable；Contact net stagger can also be measured while measuring contact force；It is simple that equipment is installed；Small using fibre optic strain sensor, light weight can be embedded in inside pantograph pan, small on pantograph this body structure influence；For measuring OCS and pantograph system dynamic contact force and stagger.
Description
Technical field
The utility model belongs to electrification railway contact net detection technique field more particularly to pantograph contact net system peace
Full monitoring and fault diagnosis field.
Background technology
In high-speed electric railway, it is installed on the pantograph of roof of train and the contact Netcom being erected at by track circuit
The transmission that electric energy is realized in sliding contact is crossed, and the dynamic contact force between contact net-pantograph directly reflects Pantograph-OCS system
Current carrying quality.In order to rationally assess the matching relationship of Pantograph-OCS system design parameter, grasp during bullet train normal service by
The development law of current mass needs to carry out accurate measurements to the dynamic contact force of Pantograph-OCS system by way of on-line monitoring.
Current more common method is to carry out contact force detection by force snesor and acceleration transducer, based on by electricity
Bend bow head Principle of equilibrium of three dimensional force system, consider that inertia is corrected to obtain bow net contact after measuring the interaction force of bow head and stent
Power, including document《Railway technology is innovated》's《Bow net contact power detects key technology》；《Railway technology is supervised》's《Bow net dynamic
Contact force method of measuring》.But this method is influenced by bow head slide plate flexible deformation, needs to consider that inertia force, air move
Easily by electromagnetic interference, essence is measured in the case of high-speed cruising for factors such as power, frictional force, and sensor is mostly using electric transducer
It spends limited；While need to consider the data transmission between high-side signal collecting unit and low-side signal processing unit, electromagnetic screen
The problems such as covering, experimental provision are complex.And the sensor bulk of common technology is larger, can only be mounted on by appropriate tooling
The outside of pantograph collector head, so as to have a certain impact to the dynamics of pantograph and contact net system.
Compared to domestic measuring method,《Quarterly Report of Railway Technical Research
Institute》In deliver within 2014《Measurement of the Contact Force of the Pantograph
by Image Processing Technology》In, using video camera measure movement in bow head pendulum spring vibration displacement,
Thus the internal force and vibration acceleration between bow head and stent are calculated, so as to derive contact force by internal force and inertia force.
Separately have《Proceedings of SPIE》In deliver within 2010《An approach to monitor railway
pantograph-catenary interaction with fiber optic sensors》, by way of Frequency sweep experiments
Obtain the discrete filter defined by 6 transmission function extreme values, zero and the gain of 0-200Hz, i.e. contact force and grating
Transmission function between strain-responsive determines contact force with realizing.With above-mentioned using pantograph as the measurement side of research object
Method is different,《Quarterly Report of Railway Technical Research Institute》In deliver within 2007
's《The Pantograph Contact Force Measurement Method in Overhead Catenary
System Vehicle System Dynamics》, contact net system is idealized as to the flexible cable of endless, by measuring point position
It puts place's arrangement foil gauge and measures dropper power and contact line tension, the power system of vertical direction puts down at measuring point using contact net system
Weigh principle, and the contact force for realizing test section measures.But for above-mentioned contact force measuring method, measuring accuracy need to be carried
During height, particularly high-speed cruising, and experimental provision is complex, and the restrictive condition of installation is also more.
Utility model content
Utility model the purpose of this utility model is to provide a kind of bow net contact force measuring device, it can efficiently solve bow
The real-time monitoring problem of net dynamic contact force.
The utility model for realize purpose the technical solution adopted is that：A kind of bow net contact force measuring device, including sensing
Device unit, induction signal collecting unit and data processing unit, sensor unit is by being arranged in pantograph pan aluminium support lower clapboard
The strain transducer on surface and the acceleration transducer composition being arranged below pantograph pan aluminium support, signal output pass through light
Fibre is connected to signal processing unit, demodulated, then is transferred to the data processing of interior low-pressure end from roof high-pressure side through cable
Unit.
The number of the strain transducer is no less than two.
At least two strain transducers are arranged in other than contact net stagger range, respectively close to left and right both ends bow head
Flexibly support position.
The strain transducer insertion is mounted on pantograph pan aluminium support boring layer, but be not limited to aluminium support boring
Layer, can also be mounted on pantograph pan aluminium support bottom outer surface or side.
The number of the acceleration transducer is no less than two, mounted on pantograph pan aluminium support lower surface, can also pacify
Mounted in bow head and resilient support hinged place.
The utility model is to realize its function by bow net contact force measuring method：
Pantograph collector head is considered as beam model, derives that bow head strains dynamics response,
Bow head strains dynamics response such as following formula：
In formula：ε is pantograph pan longitudinal strain, and F is bow net contact forces, and m is the sprung mass of bow head, aiIt is slide plate
The acceleration of i-th of bottom acceleration transducer, n are the numbers of acceleration transducer, and k is aerodynamic force proportionality coefficient, and v is train
The speed of service, xpIt is the abscissa of contacting points position, x is along the abscissa of slide plate longitudinal direction any point, and E, W and L are slide plate respectively
Elasticity modulus, bending sections coefficient and equivalent length；
Establish correspondence between bow head strain and contact force；It is generated according to bow head slide plate due to bow net dynamic interaction
Strain and acceleration information, substitute into bow head strain dynamics response, obtain real-time bow net dynamic contact force and stagger.
Constant parameter slide plate equivalent length L, bending sections system in dynamics response are strained to bow head by static test
The elastic modulus E of number W and slide plate, are demarcated；
Theoretical model is to consider pantograph collector head into freely-supported beam model, but be not limited to freely-supported beam model or bullet
Property support beam model, bow net strain dynamics response does not change.
The beneficial effects of the utility model are：
1st, the bow net contact force measuring method of the utility model is established direct corresponding between contact force and the strain of bow head slide plate
Relationship measures the strain of pantograph collector head to obtain contact force, and the variable being related to is few, reduces the mistake generated by intermediate variable
Difference.
2nd, contact net stagger can also be measured while the utility model measures contact force, stagger is eliminated and measures dress
It puts.
3rd, the bow net contact force measuring device of the utility model, installation equipment are simple；Using fibre optic strain sensor, volume
Small, light weight can be embedded in inside pantograph pan, small on pantograph this body structure influence with slide plate as one；Optical fiber simultaneously
Sensor high temperature resistant, anti-interference is good, and measurement error is small as caused by environment, applied widely.
Description of the drawings
Fig. 1 is the contact force measuring device connection relationship diagram of the utility model.
Specific embodiment
With reference to embodiment, the utility model is described in further detail, and specific embodiment described herein is only
It is only used for explaining the utility model rather than the restriction to the utility model.
In conjunction with attached drawing 1, the utility model is described in further detail.
A kind of basic thought of bow net contact force measuring device be using strain transducer directly measure pantograph pan by
Force sensor measuring pantograph collector head and branch are used in the strain generated in bow net dynamic contact force rather than traditional measurement method
The interaction force of frame.
The measurement of contact force and stagger is realized using attached device shown in FIG. 1：
A kind of bow net contact force measuring device, including sensor unit 3, induction signal collecting unit 4 and data processing unit
5, sensor unit 3 is by being arranged on two strain transducers 1 of pantograph pan aluminium support bottom outer surface and being arranged on pantograph
Two acceleration transducers 2 below slide plate aluminium support form, and signal output is connected to signal gathering unit 4 by optical fiber, passes through
Demodulation is crossed, then is transferred to the data processing unit 5 of interior low-pressure end from roof high-pressure side through cable.Wherein strain transducer 1 is adopted
It is right with the fibre optic strain sensor (measurement error is less than 1%, quality about 10g, size 20mm*5mm*1mm) with temperature-compensating
Claim to be mounted at the 300mm of slide plate center.Acceleration transducer 2 uses 3-axis acceleration sensor (range 100g), symmetrically
Mounted on slide plate bottom outer surface, at pantograph collector head resilient support.When pantograph and contact net interact, by electricity
Bend slide plate and generate strain and acceleration because contact force acts on, by signal after being measured by strain transducer 1 and acceleration transducer 2
Collecting unit 4 through cable is transferred to interior low-pressure end data processing unit 5 after acquiring and demodulating from roof high-pressure side.Data processing
Unit 5 is based on pantograph collector head and strains dynamics response, and the strain data of input, acceleration information are processed into real-time contact
Force data and pull-out Value Data.Wherein static demarcating is completed on experimental bench, by loading constant connect in different contact position
Touch, while the strain of different operating modes is acquired, dynamics response is strained using pantograph collector head, pantograph pan longitudinally should
Become, bow net contact forces, the abscissa of contacting points position and strain point position obtain the constant ginseng in equation as known quantity
Number, slide plate equivalent length L and bending sections coefficient W.
The utility model is to realize its function by a kind of bow net contact force measuring method, is to regard pantograph collector head
For beam model, derive that bow head strains dynamics response,
Bow head strains dynamics response such as following formula：
In formula：ε is pantograph pan longitudinal strain, is measured by strain transducer；F is bow net contact forces；M is bow head
Sprung mass, in this embodiment using TSG22 type pantographs, m=4.8kg；aiIt is i-th of slide plate bottom acceleration transducer
Acceleration, measured by acceleration transducer；N is the number of acceleration transducer, in this embodiment n=2；K is aerodynamic force
Proportionality coefficient, here k=0.00228；V is train running speed, xpIt is the abscissa of contacting points position；X is along slide plate longitudinal direction
The abscissa of any point, in this embodiment, strain transducer is symmetrically arranged on the position of slide plate distance from bottom slide plate center 300mm
It puts, x=± 0.3m；E, W and L is the elasticity modulus of slide plate, bending sections coefficient and equivalent length respectively, is demarcated by static test
After obtain, L=1.2m, EW=2.54 × 105。
Establish correspondence between bow head strain and contact force；It is generated according to bow head slide plate due to bow net dynamic interaction
Strain and acceleration information, substitute into bow head strain dynamics response, obtain real-time bow net dynamic contact force and stagger.
Claims (5)
1. a kind of bow net contact force measuring device, including sensor unit (3), signal gathering unit (4) and data processing unit
(5), it is characterised in that：Sensor unit (3) is by being arranged on the strain transducer (1) of pantograph pan aluminium support lower clapboard inner surface
With acceleration transducer (2) composition being arranged below pantograph pan aluminium support, signal output is connected to signal by optical fiber
Processing unit (4), it is demodulated, then the data processing unit (5) of interior low-pressure end is transferred to through cable from roof high-pressure side.
2. a kind of bow net contact force measuring device according to claim 1, it is characterised in that：The strain transducer (1)
Number be no less than two.
3. a kind of bow net contact force measuring device according to claim 1, it is characterised in that：At least two strain sensings
Device (1) is arranged in other than contact net stagger range, and position is flexibly supported respectively close to the left and right both ends bow head of pantograph.
4. a kind of bow net contact force measuring device according to claim 1, it is characterised in that：Strain transducer (1) is embedded
Mounted on pantograph pan aluminium support boring layer, but aluminium support boring layer is not limited to, pantograph pan can also be mounted on
Aluminium support bottom outer surface or side.
5. a kind of bow net contact force measuring device according to claim 1, it is characterised in that：Acceleration transducer (2)
Number is no less than two, mounted on pantograph pan aluminium support lower surface, can also be mounted on pantograph collector head and be cut with scissors with resilient support
Meet place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721273665.5U CN207556715U (en) | 2017-09-29 | 2017-09-29 | A kind of bow net contact force measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721273665.5U CN207556715U (en) | 2017-09-29 | 2017-09-29 | A kind of bow net contact force measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207556715U true CN207556715U (en) | 2018-06-29 |
Family
ID=62675339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721273665.5U Active CN207556715U (en) | 2017-09-29 | 2017-09-29 | A kind of bow net contact force measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207556715U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621319A (en) * | 2017-09-29 | 2018-01-23 | 西南交通大学 | A kind of bow net contact force measuring method and its measurement apparatus |
| CN112146605A (en) * | 2020-09-21 | 2020-12-29 | 北京运达华开科技有限公司 | Method and system for measuring pull-out value of contact network |
| CN114001850A (en) * | 2021-10-25 | 2022-02-01 | 南京地铁建设有限责任公司 | Pantograph pressure detection method and system |
| CN114509192A (en) * | 2020-11-17 | 2022-05-17 | 合肥中车轨道交通车辆有限公司 | Bow net contact force detection device suitable for urban rail transit |
| CN115014600A (en) * | 2022-04-22 | 2022-09-06 | 西南交通大学 | Non-contact bow net contact force detection method |
| CN118245862A (en) * | 2024-02-27 | 2024-06-25 | 浙江省轨道交通运营管理集团有限公司 | Method for identifying contact net geometric parameters based on pantograph dynamics response |
-
2017
- 2017-09-29 CN CN201721273665.5U patent/CN207556715U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621319A (en) * | 2017-09-29 | 2018-01-23 | 西南交通大学 | A kind of bow net contact force measuring method and its measurement apparatus |
| CN107621319B (en) * | 2017-09-29 | 2023-10-13 | 西南交通大学 | Bow net contact force measuring method and measuring device thereof |
| CN112146605A (en) * | 2020-09-21 | 2020-12-29 | 北京运达华开科技有限公司 | Method and system for measuring pull-out value of contact network |
| CN114509192A (en) * | 2020-11-17 | 2022-05-17 | 合肥中车轨道交通车辆有限公司 | Bow net contact force detection device suitable for urban rail transit |
| CN114001850A (en) * | 2021-10-25 | 2022-02-01 | 南京地铁建设有限责任公司 | Pantograph pressure detection method and system |
| CN115014600A (en) * | 2022-04-22 | 2022-09-06 | 西南交通大学 | Non-contact bow net contact force detection method |
| CN115014600B (en) * | 2022-04-22 | 2023-10-24 | 西南交通大学 | Non-contact bow net contact force detection method |
| CN118245862A (en) * | 2024-02-27 | 2024-06-25 | 浙江省轨道交通运营管理集团有限公司 | Method for identifying contact net geometric parameters based on pantograph dynamics response |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207556715U (en) | A kind of bow net contact force measuring device | |
| CN107621319A (en) | A kind of bow net contact force measuring method and its measurement apparatus | |
| CN106017839B (en) | Based on flexible, hinged plate benging and twisting vibration detection control apparatus and method | |
| US6418397B1 (en) | Device for measuring the contact force in a power collector | |
| CN110132527A (en) | A kind of model vibration monitoring method in the wind tunnel test based on balance signal | |
| CN107117037B (en) | Rod type pressure sensor for bow net contact force and method for measuring bow net contact force | |
| EA030190B1 (en) | Sensor including an electrical transmission-line, parameter of which changes responsive to vehicular load | |
| CN110806236A (en) | Dynamic detection device for bow net pressure and hard points | |
| CN102252627B (en) | Gauge detection device and detection method for high-speed railway track | |
| CN112193080B (en) | Attitude detection system, attitude detection method, computer device, and storage medium | |
| CN107367237B (en) | A kind of deformation application of distributed optical fiber sensing system and Calibration Method | |
| CN103528729B (en) | Optical fiber type on-line real-time pantograph lifting pressure detection system | |
| CN108474702A (en) | The load measurement system and load measuring of motion guide device and the service life calculation method of motion guide device | |
| CN110470373A (en) | A kind of two-way bridge vibration monitoring device | |
| CN105910779A (en) | Bridge beam body deformation sensing system and sensor | |
| CN206523645U (en) | A kind of optical fiber detector for structure of being shaken with laterally limit | |
| JP3352009B2 (en) | Contact force measuring device | |
| CN102410818B (en) | High-precision measurement system for measuring deformation of measured piece in high and low temperature box | |
| CN209673907U (en) | A kind of sensor | |
| CN204388794U (en) | A kind of pole line ice covering thickness measurement mechanism | |
| CN103884462A (en) | Contact pressure and friction force dynamic detection device | |
| CN205748944U (en) | Current-output type high-speed train bogie stationarity detection equipment | |
| CN102109334B (en) | Absolute displacement measuring device | |
| Kim | An experimental study of the dynamic characteristics of the catenary-pantograph interface in high speed trains | |
| JP4171800B2 (en) | Prediction method and device for seismic source time, epicenter distance and scale based on electric field observation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |