CN206556888U - Train wheel contact vibration tester based on axle box acceleration electromagnetism interference - Google Patents

Abstract

The utility model discloses a kind of train wheel contact vibration tester based on axle box acceleration electromagnetism interference, it is made up of support flat board, rubber sleeve, radio speed sensor, Wireless Acceleration Sensor, wireless laser acceleration transducer, signal receiver, computer.Support flat board is enclosed on the end cap of Railway wheelset, sensor is each attached to support flat board upper and lower ends, unsteadiness of wheels coefficient during train driving is measured by sensor, transmitted by mixed-media network modules mixed-media to receiver, computer finally gives variation relation of the Oscillating Coefficients with train running speed.The ELIMINATION OF ITS INTERFERENCE that may be subject to wireless senser using software and hardware combining, disappeared by small echo become method to vibration-testing data carry out disappear, during train driving realize in real time monitoring.The system architecture is simple, be easy to carry, simple to operate, convenient disassembly, measuring accuracy are high, analysis is accurate, it is adaptable to various passenger traffics, goods train.

Description

Train wheel contact vibration tester based on axle box acceleration electromagnetism interference

Technical field

The utility model is related to for train wheel contact vibration test, particularly a kind of to be based on the anti-electromagnetism of axle box acceleration The train wheel contact vibration tester of interference.

Background technology

In recent years, railway transportation develops towards high speed, heavy duty and high density direction, and dynamic action is significantly carried between promoting wheel track Height, the period of change of track condition shortens, and causes unsteadiness of wheels to aggravate, vehicle ride comfort level reduction, so as to wheel The monitoring of contact vibration proposes higher requirement with management and control.Guarantee of the test of wheel contact vibration for vehicle riding quality Tool is of great significance.The equipment such as the commonly used sensor of test of wheel contact vibration, and working sensor or nothing Line mixed-media network modules mixed-media is transmitted usually can be by many interference, and such as electromagnetic induction interference, electrostatic induction interference, leakage current sensing are dry Disturb, Radio frequency interference and other interference.These interference would generally influence the precision and transmission accuracy of sensor, cause actual observation record The baseline drift of waveform.Influence of the acceleration to analysis result in test data is very big, and especially data are integrated, this It will be huge to plant influence, and only axle box acceleration signal is carried out to carry out double integrator after disappearing, can just be obtained more Unsteadiness of wheels state exactly.

Current unsteadiness of wheels detection technique has financial cost is high, system composition is complicated, anti-electromagnetic interference capability is weak etc. Shortcoming.Therefore, in the urgent need to research and develop it is a kind of it is inexpensive, simple and direct efficiently, the unsteadiness of wheels measuring technology of electromagnetism interference with Adapt to the fast-developing trend of railway traffic.

It is joined directly together in structure, will approx can be taken turns to regarding rigid body, axle box acceleration energy as with wheel in view of axle box It is enough directly characterize take turns to vibrational state.Therefore the utility model tests wheel contact vibration state based on axle box acceleration.

The content of the invention

In order to overcome the shortcomings of described in above-mentioned background technology, the utility model provides a kind of based on the anti-electromagnetism of axle box acceleration The train wheel contact vibration tester of interference, support is passed through first with radio speed sensor and Wireless Acceleration Sensor Plane is fixed on axle box end cap, obtains vertical vibration coefficient with the variation relation of train running speed, wireless laser accelerates Spending sensor utilizes laser on the basis of outer rail, obtains oscillation crosswise coefficient with the variation relation of train running speed, and then Volume of data is drawn by vibrational image by computer, as far as possible may be subject to wireless senser by software and hardware combining ELIMINATION OF ITS INTERFERENCE, disappear finally by small echo become method to vibration-testing data carry out disappear.The system architecture is simple, easy to operate, tear open Unload convenience, analyzing test data accurate.

The utility model, which solves the technical scheme that its technical problem used, to be included by support flat board, end cap, rubber sleeve, nothing Linear velocity trans, Wireless Acceleration Sensor, wireless laser acceleration transducer, strong magnets, signal receiver, computer Composition, it is essentially characterized in that：Support flat board（2）It is enclosed on the end cap of train wheel wheel pair（3）On, radio speed sensor（5） And Wireless Acceleration Sensor（6）It is placed on support flat board（2）On, wireless laser acceleration transducer（7）Pass through packing ring and fastening It is bolted to support flat board（2）Lower part, above three sensor is by signal receiver（8）, signal receiver （8）Transmit a signal to computer（9）.Electromagnetic interference is excluded using software and hardware combining, it is essentially characterized in that：Hardware aspect, Using the power supply of high noise immunity, the stable output of power supply, piezo-resistance in parallel are realized；Software aspects, are timed in timer Before, CPU accesses a timer, allows timer to restart timing, and normal procedure operation, the timer will not produce spilling Pulse, watchdog would not also work.Support flat board（2）Embedded rubber sleeve（4）It is enclosed on train with keeping flatbed horizontal Take turns to end cap（3）On clamped with fastening bolt, support plate diameter can be finely adjusted by fastening bolt.Radio speed is sensed Device（5）And Wireless Acceleration Sensor（6）Shell lower end is strong magnets, and absorption is in support flat board（2）On, support flat board（2） There are a through hole, wireless laser acceleration transducer in lower part（7）It is fixed on by packing ring and fastening bolt on through hole.Signal connects Receive device（8）And computer（9）It is placed in compartment, radio speed sensor（5）, Wireless Acceleration Sensor（6）Swash with wireless Acceleration by light degree sensor（7）Signal receiver is transferred signals to using mixed-media network modules mixed-media（8）, signal receiver（8）Connect by USB Head transfers signals to computer（9）On.And oscillation crosswise signal vertical to axle box carries out wavelet transform, that is, uses Mallat algorithms, the frequency of signal, which is continuously dropped, to be partly divided on different layers.Decomposition level is determined, i.e., first signal is filtered Ripple carries out convolution with corresponding low pass H, high-pass filter G again；Approximation coefficient progress pressure zero setting to this layer, and detail coefficients Remain unchanged, and be reconstructed, reconstruct be exactly first progress dot interlace zero insertion, then with corresponding low pass h, g volumes of high-pass filter Product.Axle box acceleration signal is carried out to carry out double integrator after disappearing, obtains that suitable axle box is vertical and value of lateral displacement, so that Obtain train wheel space contact vibration state.

The utility model has an advantageous effect in that compared with background technology：

（1）Radio speed sensor and Wireless Acceleration Sensor use strong magnetic suck on support flat board, dismounting side Just；

（2）Wireless laser acceleration transducer is fastened on below support flat board using bolt, is penetrated using laser outside rail Side coordinates velocity sensor, obtains wheel oscillation crosswise coefficient with train running speed variation relation；

（3）Support flat board is enclosed on wheel opposite end using rubber axle sleeve and covered, and the support flat board diameter of axle is carried out micro- by fastening bolt Adjust, while serving locking；

（4）Using the mode of software and hardware combining, the various electromagnetic interferences that the utility model may be subject in the course of work Effectively exclude.

（5）And transverse acceleration signal vertical to axle box carries out small echo and disappears to carry out double integrator after method, obtains suitable Axle box is vertical and lateral displacement, so as to obtain accurate train wheel space contact vibration state.

The unsteadiness of wheels detection method is simple to operate, convenient disassembly, measuring accuracy high, and analysis is accurate, it is adaptable to various visitors Fortune, goods train.

Brief description of the drawings

Fig. 1 is overall work schematic diagram of the present utility model.

Fig. 2 is the structural representation of support flat board of the present utility model.

Fig. 3 is that axle box of the present utility model is vertical and oscillation crosswise signal electromagnetism interference processing method schematic diagram.

Embodiment

The utility model is described in further detail with reference to the accompanying drawings and examples：

As shown in Figure 1, wheel pair（1）, support flat board（2）, end cap（3）, rubber sleeve（4）, radio speed sensor（5）、 Wireless Acceleration Sensor（6）, wireless laser acceleration transducer（7）, signal receiver（8）, computer（9）, rail（10）.

As shown in Figure 2, flat board is supported（2）, rubber sleeve（4）, radio speed sensor（5）, Wireless Acceleration Sensor （6）, wireless laser acceleration transducer（7）.

Flat board will be supported（2）Pass through rubber sleeve（4）It is enclosed on Railway wheelset（1）End cap（3）On, it will be propped up using fastening bolt Support flat board（2）Planar water level land is fixed on end cap（3）On, pass through radio speed sensor（5）And Wireless Acceleration Sensor（6） On utilizing powerful magnet for adsorption support flat board（2）Plane on.Signal receiver（8）And computer（9）It is placed on train to be measured Passenger compartment, signal receiver（9）And computer（9）Connected by USB joint, radio speed sensor（5）With wireless acceleration Spend sensor（6）Carried out data transmission by mixed-media network modules mixed-media.

Its operation principle is：Due to train in the process of running, hub for vehicle wheel, which is in, rotates and two kinds of motion synthesis of vibration State, and positioned at Railway wheelset（1）End cap（3）In wheel pair（1）Center of rotation position, without rotate, its transport It is dynamic approximately to regard translation as, it is the optimal position of detection vibration.Pass through radio speed sensor（5）Train is measured in normal row Real-time speed during sailing, will support flat board（2）It is enclosed on end cap（3）It is upper to cause support flat board（2）And end cap（3）Place is vertical Direction Oscillating Coefficients are with the variation relation of speed, wireless laser acceleration transducer（8）It is fixed on by packing ring and fastening bolt Support flat board（2）Lower end, two sensorses are with rail（10）On the basis of outside, coordinate radio speed sensor（5）, measurement obtains Extensional vibration coefficient passes through radio speed sensor with the variation relation of train running speed（5）, Wireless Acceleration Sensor （6）, wireless laser acceleration transducer（8）Vertical vibration coefficient, the oscillation crosswise coefficient measured, obtains influence train wheel and shakes Train wheel Oscillating Coefficients are transferred to signal receiver by dynamic coefficient correlation by mixed-media network modules mixed-media（8）, signal receiver（8） The signal being collected into is transferred to by computer by USB joint（9）, computer is to draw vibrorecord by software analysis signal Picture.The exclusion of electromagnetic interference is realized using software and hardware combining.Hardware aspect, using the power supply of high noise immunity, realizes power supply Stable output, piezo-resistance in parallel；Software aspects, before timer is timed to, CPU accesses a timer, allows timer Restart timing, normal procedure operation, the timer will not produce overflow pulse, and watchdog would not also work.One The interference of denier spike occurs in that " runaway protection ", then CPU would not access timer before being timed to, thus timing signal will go out It is existing, so as to cause system reset to interrupt, it is ensured that intelligence instrument is returned on normal procedure.And oscillation crosswise signal vertical to axle box Wavelet transform is carried out, i.e., using Mallat algorithms, the frequency of signal, which is continuously dropped, to be partly divided on different layers.It is determined that point Level is solved, i.e., first signal is filtered and carries out convolution with corresponding low pass H, high-pass filter G again；To the approximation coefficient of this layer Carry out pressure zero setting, and detail coefficients remain unchanged, and be reconstructed, reconstruct is exactly first progress dot interlace zero insertion, then with it is corresponding Low pass h, high-pass filter g carry out convolution.Axle box acceleration signal is carried out to carry out double integrator after disappearing, suitable axle is obtained Case is vertical and value of lateral displacement, so as to obtain train wheel space contact vibration state.

The utility model is exemplarily described above in conjunction with accompanying drawing, it is clear that the utility model implement not by The limitation of aforesaid way, if the various transformations that method design of the present utility model and technical scheme are carried out are employed, or without Improvement directly applies to other occasions, within protection domain of the present utility model.

Claims (4)

1. the train wheel contact vibration tester based on axle box acceleration electromagnetism interference, by support flat board, end cap, rubber Set, radio speed sensor, Wireless Acceleration Sensor, wireless laser acceleration transducer, strong magnets, signal receiver, Computer is constituted, and it is essentially characterized in that：Support flat board（2）It is enclosed on the end cap of train wheel wheel pair（3）On, radio speed sensing Device（5）And Wireless Acceleration Sensor（6）It is placed on support flat board（2）On, wireless laser acceleration transducer（7）By packing ring and Fastening bolt is connected to support flat board（2）Lower part, above three sensor is by signal receiver（8）, signal connects Receive device（8）Transmit a signal to computer（9）, the radio speed sensor and Wireless Acceleration Sensor are detachably, described Support flat board can be finely adjusted locking.

2. the train wheel contact vibration tester according to claim 1 based on axle box acceleration electromagnetism interference, its It is characterised by：Support flat board（2）Embedded rubber sleeve（4）It is enclosed on the end cap of Railway wheelset with keeping flatbed horizontal（3）It is upper to use tight Fixing bolt is clamped, and support plate diameter can be finely adjusted by fastening bolt.

3. the train wheel contact vibration tester according to claim 1 based on axle box acceleration electromagnetism interference, its It is characterised by：Radio speed sensor（5）And Wireless Acceleration Sensor（6）Shell lower end is strong magnets, and absorption is in support Flat board（2）On, support flat board（2）There are a through hole, wireless laser acceleration transducer in lower part（7）Pass through packing ring and fastening spiral shell Bolt is fixed on through hole.

4. the train wheel contact vibration tester according to claim 1 based on axle box acceleration electromagnetism interference, its It is characterised by：Signal receiver（8）And computer（9）It is placed in compartment, radio speed sensor（5）, radio acceleration pass Sensor（6）With wireless laser acceleration transducer（7）Signal receiver is transferred signals to using mixed-media network modules mixed-media（8）, signal connects Receive device（8）By USB joint by signal in computer（9）On.