CN-122017443-A - Intelligent bow net abnormal wear measurement method

Abstract

The invention discloses an intelligent bow net abnormal wear measuring method, creatively combines with the intelligent detection manipulator of precision manufacture, applies the comprehensive technology of wireless transmission, pneumatic components and a PLC program electric control system, and through a series of software and hardware operations, the manipulator stably grasps wires, intelligently rotates, senses, transmits and the like, and is mainly applied to the contact wires (27.5 KV and AC) of an overhead high-voltage transmission bow net of an electrified high-speed railway and the detection method (commonly used 0.75KV and 1.5KV and DC) of the overhead medium-voltage transmission bow net of an urban rail transit and an electric locomotive, thereby realizing the on-line electrification and random detection of the minimum value and the azimuth of the residual height of the contact wires and the contact wires of the locomotive bow net when the locomotive runs, and calculating the wear value and the azimuth before the use critical point generated by the relative friction of a pantograph so as to carry out necessary repair and replacement, thereby effectively avoiding the occurrence of serious accidents such as transmission contact wire disconnection and the like, and avoiding serious accidents when the locomotive runs.

Inventors

• JIN XIAOLIANG
• XU ZHONGFANG

Assignees

• 金晓亮
• 徐忠芳

Dates

Publication Date

20260512

Application Date

20241112

Claims (6)

1. 1. The intelligent bow net abnormal wear measuring method includes intelligent detection manipulator with radio transmission, pneumatic assembly, miniature control box of PLC program electrically controlled assembly, notebook computer and corresponding program controlling software. The intelligent detection manipulator is characterized in that the pneumatic assembly is connected with the PLC program electric control assembly, and a digital linear displacement sensor arranged on the intelligent detection manipulator is connected with signals of the wireless signal transmission system.
2. 2. The method for measuring abnormal wear of an intelligent bow net according to claim 1, wherein the hardware part consisting of an intelligent detection manipulator with wireless transmission, a pneumatic assembly and a PLC electric control assembly is completed by operating an electric and pneumatic control operation system arranged on a portable computer, and the method is integrated with comprehensive technical methods of machinery, electric, pneumatic and communication into a whole set of equipment for high-altitude detection.
3. 3. The method for measuring abnormal wear of the intelligent bow net is characterized by being applied to detection of contact lines (27.5 KV and AC) of an overhead high-voltage transmission bow net of an electrified high-speed railway and contact lines (commonly used 0.75KV and 1.5KV and DC) of overhead medium-voltage transmission bow nets of urban rail transit and electric locomotives, and on-line electrification and random detection of wear values and orientations before use critical points generated by relative friction between the contact wires and the pantographs of the locomotives during operation of the locomotives.
4. 4. The method for measuring the abnormal wear of the intelligent bow net is characterized in that the method does not have the discreteness of measured data and strict requirements on measuring environments (climate, illuminance and the like), is not influenced by shock and winding degree of contact wires of the bow net, can be used for originally detecting randomly at any part of the ground (a detection manipulator can be used for releasing hands after the detection manipulator is used for conveying wires to be measured only), can be used for detecting on an aerial ladder of an locomotive, can be used for detecting the wear of the contact wires of the bow net on a curve, and can be used for carrying out intelligent measurement operation by freely moving a hanging wire to a key positioning point, an electric connection point, a wire connection, a central anchor connection, an electric split phase and an electric segment connection which are most easily worn after the intelligent detection manipulator is released, as in the detection on a straight road.
5. 5. A method for measuring abnormal abrasion of intelligent bow net according to claim 1 and 3 is characterized in that the main operation process of the intelligent detection manipulator is that a Program Logic Controller (PLC) starts working, and gives out instructions to different miniature electromagnetic directional valves according to program output instructions, wherein five measuring points of a near end I, a near end II, a midspan, a far end I and a far end II are oriented to be a working cycle for 10 seconds, and the working of positioning, rotation and sensor pointer induction are finished by operating miniature cylinders with different functions arranged on the detection manipulator through pneumatic components synchronously.
6. 6. The method for measuring abnormal wear of an intelligent bow net according to claims 1, 3 and 5 is characterized in that the intelligent detection manipulator is provided with a wireless transmission module and a digital display linear displacement sensor and is connected with a signal transmission assembly, so that ground receiving is realized. The receiving terminal adopts a notebook computer with Bluetooth function to display, record and count the detected wear data of the contact line of the bow net, so as to obtain the minimum retention height and the azimuth of the contact wire to be detected, display the wear general view, store the wear general view into the computer in a certain format, and directly print the wear report of the contact wire to be detected as follows: after several tests were completed, the following complete comprehensive report was listed:

Description

Intelligent bow net abnormal wear measurement method Technical Field The invention relates to a measuring method for the contact abnormal abrasion of a high-altitude bow net, which is applied to an electric power transmission and distribution system, in particular to intelligent detection of the abrasion condition of a high-speed rail and urban rail transit pantograph contact net lead, provides abrasion data before a critical point, adopts corresponding maintenance measures, and avoids the occurrence of power supply accidents of broken lines. Background When a locomotive of rail transit such as high-speed rail, subway, inter-city and the like runs, the pantograph and the power transmission contact line have dry friction relative motion of 60-100 m/s, and abrasion can be naturally generated. When abrasion is gradually increased, the resistance, current density, temperature rise and electric power of the lead are increased along with the abrasion, and particularly for subways, the phenomena of arcing and arcing of the bow net are easy to be aggravated. If the power transmission contact line is detected and processed in time, serious accidents such as disconnection of the power transmission contact line can be avoided, and therefore serious accidents during operation of the locomotive are avoided. In order to improve the abrasion condition of the rail transit bow net and further reduce the sparking phenomenon of the subway urban rail, the detection and maintenance of the pantograph and the contact net are required to be carried out so as to optimize the smoothness and the following performance of sliding between the bow nets and reduce the offline rate. The optical measuring system is formed by arranging a square horizontal flat plate on a locomotive and arranging a high-resolution diode line camera at each of four corners. The maximum error of the precision of the contact wires of the measuring bow net is 0.5-0.6 mm, the average error is 0.2-0.3 mm, the price is more than hundred thousand Euro, the equipment weight is more than 300 kg, and in addition, the laser scanning measurement is adopted on the existing useful detection vehicle. The non-contact telemetry devices can not meet the requirements of China for detecting the running state of the contact line of the bow net after Gao Tiedi speed, and can not meet the basic guidelines of 1) safety, 2) accuracy, 3) economy, practicality and the like of the requirement of rail transit on the modern implementation of locomotive equipment. At present, the measurement of bow net abrasion in China is still carried out by using a traditional method for decades, such as power failure, parking, aerial ladder lifting and manual vernier caliper measurement. The old diameter measuring method has the advantages of large workload and poor high-altitude detection precision, and particularly, the eccentric wear of the contact line of the bow net on a curve is difficult to accurately measure because the semicircle on the contact line relates to the wire clamping groove. In recent years, the operation and the method for simulating the manual caliper measurement have been advanced, but the key defects are that when the measuring instrument is hung on an arch net contact line, the wire is clamped and aligned to a desired position, the residual height of the wire is measured, and the caliper is loosened after the measurement. The method has the defects that the whole operation process relies on seven meters outside to manually push an instrument into a wire by using a high-voltage insulating rod, the instrument is stable and can not be put on hand, the instrument is used as a positioning and measuring reference for instrument measurement, artificial factors are doped, the clamping force of a measuring rod imitating a caliper movable jaw is weak, and the stability of the measuring positioning and reference is insufficient. Therefore, the measurement of rail transit bow net abrasion in China cannot be satisfied. Disclosure of Invention In order to solve the various defects in the current situation, the invention provides an intelligent bow net abnormal wear measuring method, creatively combines the comprehensive technology of an intelligent detection manipulator, wireless transmission, a pneumatic component and a PLC program electric control system for precision mechanical manufacturing, and realizes the automatic intelligent detection of the minimum value and the azimuth of the residual height of the contact line of the bow net by a series of soft and hardware operations, such as the stable gripping of a wire by a lifting ring hand, intelligent rotation, induction and transmission. In order to solve the technical problems, the invention adopts the following scheme: In the above technical scheme, the intelligent bow net abnormal wear measurement method is further completed by operating an electric and pneumatic control operation system arranged on a portable computer through a hardwar