EP0463127B1 - Anordnung zur feststellung eines objektes mittels körperschall, sowie deren verwendung - Google Patents

Anordnung zur feststellung eines objektes mittels körperschall, sowie deren verwendung Download PDF

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Publication number
EP0463127B1
EP0463127B1 EP91900710A EP91900710A EP0463127B1 EP 0463127 B1 EP0463127 B1 EP 0463127B1 EP 91900710 A EP91900710 A EP 91900710A EP 91900710 A EP91900710 A EP 91900710A EP 0463127 B1 EP0463127 B1 EP 0463127B1
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EP
European Patent Office
Prior art keywords
intensity
sound
output signal
evaluation circuit
signal
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.)
Expired - Lifetime
Application number
EP91900710A
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German (de)
English (en)
French (fr)
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EP0463127A1 (de
Inventor
Bruno MÜLLER
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L29/00—Safety means for rail/road crossing traffic
    • B61L29/24—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
    • B61L29/28—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning electrically operated
    • B61L29/32—Timing, e.g. advance warning of approaching train
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/02—Electric devices associated with track, e.g. rail contacts
    • B61L1/06—Electric devices associated with track, e.g. rail contacts actuated by deformation of rail; actuated by vibration in rail
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L29/00—Safety means for rail/road crossing traffic
    • B61L29/08—Operation of gates; Combined operation of gates and signals
    • B61L29/18—Operation by approaching rail vehicle or train
    • B61L29/22—Operation by approaching rail vehicle or train electrically
    • B61L29/222—Operation by approaching rail vehicle or train electrically using conductor circuits with separate contacts or conductors
    • B61L29/224—Operation by approaching rail vehicle or train electrically using conductor circuits with separate contacts or conductors using rail contacts

Definitions

  • the invention relates to an arrangement for detecting an object with a structure-borne sound sensor for detecting the structure-borne noise generated by the object and transmitted to the sensor in a sound-conducting medium, and with an evaluation circuit which receives an output signal from the sensor and emits a warning signal when this output signal is predetermined Criteria met, as well as the use of this arrangement for the detection of an approaching vehicle.
  • the object of the invention is to further develop the above-mentioned arrangements for the detection of an object by means of the structure-borne noise generated by the object in such a way that even an object with a steadily increasing or decreasing intensity of the structure-borne noise generated is signaled reliably in any case and also in the presence of other interference vibrations.
  • the evaluation circuit checks the intensity periodically at regular time intervals by means of a comparator and triggers a warning signal, and if the warning signal is held until the intensity has dropped below the predetermined threshold value.
  • a warning signal is triggered when the intensity of the structure-borne noise has successively passed the two threshold values in a specific frequency range at predetermined time intervals, which is an unmistakable sign for an object with a continuously increasing intensity of the structure-borne noise generated.
  • Such an arrangement can advantageously be used, for example, for the detection of an approaching vehicle.
  • a rail vehicle e.g. a train or a locomotive on a track
  • the structure-borne noise transducers are attached to the rails and register the structure-borne noise generated by the train and transmitted via the rails to the measuring location, the intensity of which increases steadily as a train approaches.
  • the special signal evaluation ensures that a warning signal is triggered with the greatest possible certainty, even if there are disturbing noises, but that a certain selectivity is nevertheless guaranteed, so that an accident with generally catastrophic consequences can be avoided with greater certainty than if one relies on frequently unreliable human observation, especially under unfavorable weather conditions, such as fog, or in the event of fatigue or other misconduct on the part of the security guards.
  • FIG. 1 shows an arrangement for the detection of an object in the form of a train 2 approaching a track construction site B on a track 1.
  • the train 2 or the locomotive generates a characteristic structure-borne noise in the rails 1, which is transmitted from the train 2 to the construction site B via the rails as a sound-conducting medium at the speed of sound, ie at a few km / sec.
  • a structure-borne noise sensor 3 is attached to one or both rails, that is, in good sound-conducting contact. It is expedient to provide a sound pickup with a piezoelectric acoustic / electrical transducer, or a structure-borne sound pickup of another known design. This sensor 3 gives an electrical Output signal from which is fed to a signal evaluation circuit C.
  • the evaluation circuit C has, at its input, a frequency element 4 which has a frequency passband which is adapted to the frequency spectrum of a moving train and is preferably selected in the kHz range.
  • the output signal is then fed to a time discriminator 5, which is controlled by a clock generator 6.
  • the time discriminator generates two output signals for the intensity of the structure-borne noise recorded in the selected frequency range at two different times. These two signals, which are time-shifted with respect to one another, are applied to the inputs of a comparator 7, which continuously compares the intensities of two successive signal intensities with one another and sends a signal to a warning device 8 as soon as the two intensities differ by a predetermined amount.
  • This can be the triggering or activation of a warning signal for the construction team if the intensity when a train approaches a certain level has risen, or to reset or switch off the warning signal when the intensity drops when a train moves away.
  • FIG. 2 shows an example of a functional diagram of the evaluation circuit C.
  • the curve shows the time course of the intensity S of the output signal of the sensor 3 in the selected frequency range.
  • the comparator 7 of the evaluation circuit compares the intensities at successive times t1, t2, t3 ... etc., and in particular determines whether a predetermined threshold value T has been gradually exceeded between two times.
  • the threshold value T was exceeded briefly between the measuring times t1 and t2, for example as a result of a brief action such as a blow to the rail, but the intensity for both measuring times is below the threshold value, so that no warning signal is triggered in this case .
  • the intensity gradually increases and crosses the threshold value T between t2 and t3.
  • a warning signal is triggered at t3, which signals an approaching train.
  • the warning signal is held, even if it should briefly drop below the threshold T again, as shown between t4 and t5. Only when the intensity gradually decreases, as shown between t6 and t7, is the warning signal reset, as a sign that the train has left again.
  • FIG. 3 shows an advantageous development of the invention using an analog functional diagram.
  • Two staggered threshold values T1 and T2 are provided for the intensity S. As long as the intensity remains below the lower threshold T1, there is no reaction.
  • a prewarning signal is triggered first, e.g. a warning device activated and made ready for operation. If the intensity drops below the threshold T1 at time t4, the prewarning signal is reset until it e.g. is activated again at time t5 as a result of the threshold being exceeded again. If the intensity then increases further beyond the upper threshold T2, e.g. at the measurement time t6, the main warning signal is triggered at this point in time and thus signals the approach of a train.
  • the evaluation circuit C can also be constructed differently within the scope of the inventive concept. In order to perform its function, it must be set up to signal a predetermined increase (or decrease) in the output signal of the structure-borne noise sensor in a predetermined period.
  • the evaluation can also advantageously be carried out using a microprocessor. Instead of digital, the evaluation can also be carried out analog. For example, when a lower threshold T1 is exceeded, the discriminator 5 can activate a time switch which, after a predetermined delay time has elapsed, causes the discriminator to check whether the signal has exceeded the upper threshold T2 at this point in time or exceeds this threshold T2 within a certain time window .
  • the invention can also be used for the detection of other objects, provided that they cause structure-borne noise with a continuously increasing intensity at a remote measuring location, e.g. for signaling the approach of road vehicles, e.g. Tracked vehicles to a specific location by detecting ground vibrations and triggering appropriate measures.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Toys (AREA)
  • Examining Or Testing Airtightness (AREA)
EP91900710A 1990-01-12 1991-01-03 Anordnung zur feststellung eines objektes mittels körperschall, sowie deren verwendung Expired - Lifetime EP0463127B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH96/90 1990-01-12
CH96/90A CH679847A5 (enrdf_load_stackoverflow) 1990-01-12 1990-01-12
PCT/CH1991/000001 WO1991010584A1 (de) 1990-01-12 1991-01-03 Anordnung zur feststellung eines objektes mittels körperschall, sowie deren verwendung

Publications (2)

Publication Number Publication Date
EP0463127A1 EP0463127A1 (de) 1992-01-02
EP0463127B1 true EP0463127B1 (de) 1994-09-14

Family

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Family Applications (1)

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EP91900710A Expired - Lifetime EP0463127B1 (de) 1990-01-12 1991-01-03 Anordnung zur feststellung eines objektes mittels körperschall, sowie deren verwendung

Country Status (8)

Country Link
US (1) US5265831A (enrdf_load_stackoverflow)
EP (1) EP0463127B1 (enrdf_load_stackoverflow)
JP (1) JPH04504241A (enrdf_load_stackoverflow)
AT (1) ATE111404T1 (enrdf_load_stackoverflow)
CA (1) CA2049023A1 (enrdf_load_stackoverflow)
CH (1) CH679847A5 (enrdf_load_stackoverflow)
DE (1) DE59102905D1 (enrdf_load_stackoverflow)
WO (1) WO1991010584A1 (enrdf_load_stackoverflow)

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RU2457135C2 (ru) * 2010-12-03 2012-07-27 Открытое акционерное общество "Научно-исследовательский институт технической физики и автоматизации" (ОАО "НИИТФА") Устройство для контроля безопасности железнодорожной транспортировки
KR20130001652A (ko) * 2011-06-27 2013-01-04 엘에스산전 주식회사 무선열차검지유닛을 이용한 열차위치 검지 시스템
DE102012217627A1 (de) * 2012-09-27 2014-03-27 Siemens Aktiengesellschaft Verfahren zum Betreiben eines Schienenfahrzeugs in einem Eisenbahnsystem und Eisenbahnsystem
DE102014013472A1 (de) * 2013-09-30 2015-04-02 Hella Kgaa Hueck & Co. Verfahren zur Erkennung und Klassifikation von Schadensereignissen an Kraftfahrzeugen und Vorrichtung hierfür
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Also Published As

Publication number Publication date
WO1991010584A1 (de) 1991-07-25
JPH04504241A (ja) 1992-07-30
CH679847A5 (enrdf_load_stackoverflow) 1992-04-30
DE59102905D1 (de) 1994-10-20
US5265831A (en) 1993-11-30
CA2049023A1 (en) 1991-07-13
ATE111404T1 (de) 1994-09-15
EP0463127A1 (de) 1992-01-02

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