CN101870295A - Derailing detector for large road maintenance vehicle - Google Patents

Derailing detector for large road maintenance vehicle Download PDF

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Publication number
CN101870295A
CN101870295A CN 201010207414 CN201010207414A CN101870295A CN 101870295 A CN101870295 A CN 101870295A CN 201010207414 CN201010207414 CN 201010207414 CN 201010207414 A CN201010207414 A CN 201010207414A CN 101870295 A CN101870295 A CN 101870295A
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CN
China
Prior art keywords
ultrasonic
distance sensor
road maintenance
ultrasonic distance
maintenance vehicle
Prior art date
Application number
CN 201010207414
Other languages
Chinese (zh)
Inventor
尹勇
周祖德
刘泉
龙毅宏
梅伟
华长权
刘波
邢根轩
董明东
李京蔚
Original Assignee
武汉理工大学
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 武汉理工大学 filed Critical 武汉理工大学
Priority to CN 201010207414 priority Critical patent/CN101870295A/en
Publication of CN101870295A publication Critical patent/CN101870295A/en

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Abstract

The invention relates to a derailing detector for a large road maintenance vehicle. The derailing detector comprises an ultrasonic distance sensor and a processor; the ultrasonic distance sensor is arranged on the bottom of the large road maintenance vehicle and directed at the surfaces of railroad rails; the processor is used for receiving and processing a distance value transmitted by the ultrasonic distance sensor; and the processor selects the following actions: when the current distance value transmitted by the ultrasonic distance sensor is larger than or equal to a set value, transmitting an alarm signal; or when the current distance value transmitted by the ultrasonic distance sensor is less than the set value, processing a next distance value transmitted by the ultrasonic distance sensor. The derailing detector can actively detect whether the large road maintenance vehicle is derailed or probably derailed, and can transmit an alarm signal when the large road maintenance vehicle is derailed or probably derailed.

Description

A kind of derailing detector for large road maintenance vehicle

Technical field

The present invention relates to guideway vehicle, be specifically related to the large-scale road maintenance operation car of railroad maintenance department (as cleaning car, tamping car etc.) safety protection field.

Background technology

Large-scale road maintenance operation car belongs to a kind of in the train, and large-scale road maintenance operation car is in work progress, and is the same with ordinary train, also often has derailment occurring.Yet, existing relevant achievement mainly concentrates on the derail phenomenon under the environment such as high speed, heavy duty, passenger-cargo mixed race, bridge, the empty race of lorry, and the method for being taked is very complicated, and the factor of consideration is numerous, these achievements are also impracticable for the derailment occurring of large-scale road maintenance operation car, and reason is:

(1) large-scale road maintenance operation car running velocity is very slow, the slide rail derailing and the derailment occurring of jumping onto the tracks can not appear in preconditions such as unloaded lorry of full row under the emergency braking when not existing external conditions bad, over proof train running speed, irrational vehicle hanging rigidity and car body torsional stiffness and the speed-raising state and light, heavy cargo car shuffling;

(2) large-scale road maintenance operation car operation scheme is different with conventional passenger and freight train, construct while normally move, so Operation Van contacts with the wheel track of rail and stressed relation and conventional passenger and freight train differ very big;

(3) prior-warning device of developing according to existing achievement, warning device cost height, parameter are provided with complexity, and can only play and report to the police or forewarning function (consider wrong report or fail to report situation), to send signal under the derailing situation and take corresponding measure detecting to train driver, can't automatic train stop.

Because above defective does not have to be fit to large-scale road maintenance operation car derailing method of inspection and device at present as yet.The means of dealing with that the large-scale road maintenance operation car derailing of domestic solution is taked are that it is multiple to utilize rerailer or hoisting device to rise after Operation Van's derailing.This method is a kind of expeditious measures of being taked in large-scale road maintenance operation car derailing back, belongs to a kind of passive processing mode of afterwards rescuing.

Yet, because influence that large-scale road maintenance operation car derailing back is caused and the loss that brings can't be predicted, in some cases, even it is multiple to adopt rerailer or hoisting device that the large-scale road maintenance operation car that derails is successfully risen, the loss that is brought still can't be avoided but prolonging a little of causing and large-scale road maintenance operation car derail.

Summary of the invention

Whether the technical problem to be solved in the present invention is: a kind of derailing detector for large road maintenance vehicle is provided, can derails or may not derail by the large-scale road maintenance operation car of active detecting, and send alerting signal in the time of maybe may derailing in derailing.

The present invention solves the problems of the technologies described above the technical scheme of being taked to be:

A kind of derailing detector for large road maintenance vehicle is characterized in that: it comprises:

Be arranged on large-scale road maintenance operation car bottom and point to the rail rail level the ultrasonic distance sensor,

Be used to receive distance value that the ultrasonic distance sensor sends and the treater of handling;

Described treater is selected following action:

The current distance value of sending when the ultrasonic distance sensor is sent alerting signal during more than or equal to setting value;

Or,

The current distance value of sending when the ultrasonic distance sensor is handled the next distance value that the ultrasonic distance sensor sends during less than setting value.

In the such scheme, described ultrasonic distance sensor is the ultrasonic distance sensor with temperature compensation function.

In the such scheme, the ultrasonic frequency that described ultrasonic distance sensor sends is 250KHz.

In the such scheme, described ultrasonic distance sensor comprises ultrasonic probe, processing module, to the processing module output voltage signal, processing module is handled the frequency of voltage signal between 200-300KHz behind the ultrasonic probe reception ultrasonic echo, and amplitude is between 2.5-3.3v.

Principle of work of the present invention is: adopt the super sonic mode accurately to detect ultrasonic transduter and the rail level distance that is arranged on large-scale road maintenance operation car bottom, when ultrasonic transduter and rail level distance during more than or equal to setting value, illustrating that large-scale road maintenance operation car has derailed maybe may derail, and derailing detector for large road maintenance vehicle of the present invention sends alerting signal and reports to the police.

Beneficial effect of the present invention is:

But whether the derailing of the large-scale road maintenance operation car of 1 active detecting, in time remedies, and avoids loss;

2, increase temperature compensation coefficient, improve ultrasonic distance transducer sensitivity and precision;

3, ultrasonic frequency of the present invention increases, ultrasonic frequency is 250KHz, make the super sonic wavelength than generally approximately short 5 times, improved the hypracoustic penetrating capacity greatly and, avoided influences such as air humidity the antijamming capability of surrounding environment.

4, adopt the anti-ambient interference signal method that is provided with automatically based on threshold value, processing module only receives behind the ultrasonic echo to output useful voltage signal, the frequency of the useful voltage signal that processing module is handled is between 200-300KHz, amplitude is between 2.5-3.3v, with the signal outside the scope as the ambient interference signal, to remove the interfering signal that superposes in the environment, reduced the repercussions and the straight-through wave excitation of crosstalking that radiating portion brings, can reduce rate of false alarm and rate of failing to report.

Description of drawings

Fig. 1 is the structured flowchart of the sensor of the embodiment of the invention

Fig. 2 is a view before the wheel derailment

Fig. 3 is a view after the wheel derailment

Fig. 4 is the treater workflow diagram

Fig. 5 is provided with scheme drawing for ultrasonic echo frequency and amplitude thresholds

The specific embodiment

As shown in Figure 1, the embodiment of the invention comprises:

Be arranged on large-scale road maintenance operation car bottom and point to the rail rail level the ultrasonic distance sensor,

Be used to receive distance value that the ultrasonic distance sensor sends and the treater of handling;

Described ultrasonic distance sensor is the ultrasonic distance sensor with temperature compensation function, and the ultrasonic frequency that the ultrasonic distance sensor sends is 250KHz.

Described treater is selected following action:

The current distance value of sending when the ultrasonic distance sensor is sent alerting signal during more than or equal to setting value;

Or,

The current distance value of sending when the ultrasonic distance sensor is handled the next distance value that the ultrasonic distance sensor sends during less than setting value.

In the present embodiment, the ultrasonic distance sensor comprises that ultrasonic probe, temperature sensor, pulse duration modulation output module PWM (ultrasonic frequency of control ultrasonic transduter), threshold value are provided with module, time meter (the ultrasonic transduter transmitting terminal is sent super sonic, arrive the ultrasonic transduter receiving end to echo and carry out timing), temperature compensation module.Wherein, pulse duration modulation output module, threshold value are provided with module, time meter, temperature compensation module and all are integrated in the 32 bit DSP chip TMS 320 F 2812s.The pulse duration modulation output module produces the pulse of 250KHz, and driving ultrasonic transduter generation frequency is the super sonic of 250KHz.Threshold value is provided with frequency that module is provided with the useful voltage signal between 200-300KHz, and amplitude is between 2.5-3.3v.

The TMS320F2812 frequency of operation is 120MHz, and the time meter timing precision is:

μ = 1 120 × 10 6 = 8.3 × 10 - 9 s = 8.3 ns

Temperature sensor adopts the LM92 temperature sensor to carry out ambient temperature and detects, and the ambient temperature that is detected is passed to dsp chip TMS320F2812, and the propagation speed of super sonic under the varying environment temperature compensated.The temperature test resolution of LM92 temperature sensor is 0.0625 ℃, can well compensate the propagation speed of super sonic in different temperatures.

Fig. 2,3 is a scheme drawing before and after the wheel derailment, and generally, large-scale road maintenance operation car bottom, ultrasonic probe 3 places 1 (present embodiment and wheel center of circle isometry position) is 300mm with the distance of rail rail level 2; Apart from 20mm, wheel derailment moment, the distance of the wheel center of circle and rail rail level is 320mm between wheel outer ring 4 and the wheel inner ring 5, and therefore, present embodiment treater setting value is 320mm.

It is t that the ultrasonic probe transmitting terminal sends the time that super sonic to echo arrives the ultrasonic transduter receiving end, then the wheel center of circle between the rail rail level apart from s=ct/2, c is a ultrasonic velocity.

Owing to ultrasonic velocity c can change along with the influence of ambient temperature, therefore increase temperature factor c is compensated.Pass between ultrasonic velocity c and the real time environment temperature T is: c=c 0+ 0.607T, c 0Be the propagation speed in the super sonic air dielectric at normal temperatures, and c 0=340m/s.

Therefore, the wheel center of circle is to the distance between the rail rail level:

s=ct/2=(c 0+0.607T)t/2 (1)

C wherein 0Known, only need record real time environment temperature T and ultrasonic transduter transmitting terminal and send super sonic and get final product to the time t that echo arrives the ultrasonic transduter receiving end.

As shown in Figure 4, the setting value of treater is 320mm, treater compares the range signal s that setting value and computing module send, when s 〉=320mm, illustrate that large-scale road maintenance operation car has derailed or be about to derailing, treater sends alerting signal (as aud. snl., shows signal etc.) or/and stop signal; When s<320mm, large-scale road maintenance operation car safety is described, the next distance value signal that processor processing ultrasonic distance sensor sends.

As shown in Figure 5, the ultrasonic frequency of present embodiment is 250KHz, and its waveform is 3.3v through the amplitude after the processing and amplifying.The frequency of reception is set in event and the threshold value of amplitude is 250Khz and 3v, when ultrasonic frequency is positioned at 200KHz-300KHz, it when amplitude is positioned at 2.5v-3.3v useful signal, that is: ultrasonic probe receives behind the ultrasonic echo to the processing module output voltage signal, the TMS320F2812 processing module is handled the frequency of voltage signal between 200-300KHz, and amplitude is between 2.5-3.3v.Signal outside the scope is the ambient interference signal, to remove the interfering signal that superposes in the environment, has reduced the repercussions and the straight-through wave excitation of crosstalking that radiating portion brings, and has characteristics such as the rate of false alarm of reduction and rate of failing to report.

Claims (4)

1. derailing detector for large road maintenance vehicle, it is characterized in that: it comprises:
Be arranged on large-scale road maintenance operation car bottom and point to the rail rail level the ultrasonic distance sensor,
Be used to receive distance value that the ultrasonic distance sensor sends and the treater of handling;
Described treater is selected following action:
The current distance value of sending when the ultrasonic distance sensor is sent alerting signal during more than or equal to setting value;
Or,
The current distance value of sending when the ultrasonic distance sensor is handled the next distance value that the ultrasonic distance sensor sends during less than setting value.
2. derailing detector for large road maintenance vehicle as claimed in claim 1 is characterized in that: described ultrasonic distance sensor is the ultrasonic distance sensor with temperature compensation function.
3. derailing detector for large road maintenance vehicle as claimed in claim 1 is characterized in that: the ultrasonic frequency that described ultrasonic distance sensor sends is 250KHz.
4. derailing detector for large road maintenance vehicle as claimed in claim 1, it is characterized in that: described ultrasonic distance sensor comprises ultrasonic probe, processing module, ultrasonic probe receives behind the ultrasonic echo to the processing module output voltage signal, processing module is handled the frequency of voltage signal between 200-300KHz, and amplitude is between 2.5-3.3v.
CN 201010207414 2010-06-24 2010-06-24 Derailing detector for large road maintenance vehicle CN101870295A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010207414 CN101870295A (en) 2010-06-24 2010-06-24 Derailing detector for large road maintenance vehicle

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Application Number Priority Date Filing Date Title
CN 201010207414 CN101870295A (en) 2010-06-24 2010-06-24 Derailing detector for large road maintenance vehicle

Publications (1)

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CN101870295A true CN101870295A (en) 2010-10-27

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103308905A (en) * 2013-06-06 2013-09-18 湖南农业大学 Collision prevention device and method for ballast screening machine
CN107521520A (en) * 2017-08-18 2017-12-29 唐智科技湖南发展有限公司 A kind of method and system of wheel derailment early warning
CN108274113A (en) * 2018-01-19 2018-07-13 上海维宏电子科技股份有限公司 The laser head assembly carried apart from inducing function with temperature-compensating
CN108333590A (en) * 2017-12-05 2018-07-27 欣旺达电子股份有限公司 Method, apparatus, equipment and the storage medium of ultrasonic wave frequency conversion ranging
CN109032057A (en) * 2018-07-10 2018-12-18 北京同和时代科技有限公司 To monitoring method, the device and system of the polishing trolley derailing of track grinding machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994459A (en) * 1974-04-18 1976-11-30 M.L. Engineering (Plymouth) Limited Railway vehicle derailment detection system
EP0697320A1 (en) * 1994-08-19 1996-02-21 Sintro Electronics AG Device for detecting a derailment of vehicles running on rails
JP2007008415A (en) * 2005-07-04 2007-01-18 Fuji Heavy Ind Ltd Vehicular drive assisting device
CN201298077Y (en) * 2008-11-07 2009-08-26 王旭斌 An error compensation type ultrasonic ranging apparatus
CN201314953Y (en) * 2008-09-27 2009-09-23 北京竞业达数字系统科技有限公司 Ultrasonic ranging system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994459A (en) * 1974-04-18 1976-11-30 M.L. Engineering (Plymouth) Limited Railway vehicle derailment detection system
EP0697320A1 (en) * 1994-08-19 1996-02-21 Sintro Electronics AG Device for detecting a derailment of vehicles running on rails
JP2007008415A (en) * 2005-07-04 2007-01-18 Fuji Heavy Ind Ltd Vehicular drive assisting device
CN201314953Y (en) * 2008-09-27 2009-09-23 北京竞业达数字系统科技有限公司 Ultrasonic ranging system
CN201298077Y (en) * 2008-11-07 2009-08-26 王旭斌 An error compensation type ultrasonic ranging apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103308905A (en) * 2013-06-06 2013-09-18 湖南农业大学 Collision prevention device and method for ballast screening machine
CN103308905B (en) * 2013-06-06 2015-12-23 湖南农业大学 A kind of ballast screen scarifier collision avoidance system and method
CN107521520A (en) * 2017-08-18 2017-12-29 唐智科技湖南发展有限公司 A kind of method and system of wheel derailment early warning
CN107521520B (en) * 2017-08-18 2019-04-05 唐智科技湖南发展有限公司 A kind of method and system of wheel derailment early warning
CN108333590A (en) * 2017-12-05 2018-07-27 欣旺达电子股份有限公司 Method, apparatus, equipment and the storage medium of ultrasonic wave frequency conversion ranging
CN108274113A (en) * 2018-01-19 2018-07-13 上海维宏电子科技股份有限公司 The laser head assembly carried apart from inducing function with temperature-compensating
CN109032057A (en) * 2018-07-10 2018-12-18 北京同和时代科技有限公司 To monitoring method, the device and system of the polishing trolley derailing of track grinding machine

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