FR2860875A3 - Vehicle speed measuring device for validating measurement of speed detection device, has accelerometer to calculate instantaneous speed, where measuring device interrupts signal coming from detection device upon exceeding speed threshold - Google Patents

Vehicle speed measuring device for validating measurement of speed detection device, has accelerometer to calculate instantaneous speed, where measuring device interrupts signal coming from detection device upon exceeding speed threshold Download PDF

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Publication number
FR2860875A3
FR2860875A3 FR0311850A FR0311850A FR2860875A3 FR 2860875 A3 FR2860875 A3 FR 2860875A3 FR 0311850 A FR0311850 A FR 0311850A FR 0311850 A FR0311850 A FR 0311850A FR 2860875 A3 FR2860875 A3 FR 2860875A3
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FR
France
Prior art keywords
speed
detection device
measuring device
accelerometer
exceeding
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.)
Pending
Application number
FR0311850A
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French (fr)
Inventor
Jean Pierre Quatrefages
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PEGASE INSTRUMENTATION
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PEGASE INSTRUMENTATION
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Publication date
Application filed by PEGASE INSTRUMENTATION filed Critical PEGASE INSTRUMENTATION
Priority to FR0311850A priority Critical patent/FR2860875A3/en
Publication of FR2860875A3 publication Critical patent/FR2860875A3/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
    • G08G1/054—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed photographing overspeeding vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
    • G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P7/00—Measuring speed by integrating acceleration

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

The measuring device has an accelerometer to calculate the speed of a non-rigid medium on which a speed detection device is assembled. The accelerometer associated to an electronic board calculates instantaneous speed by a method of successive integration. The measuring device interrupts a signal coming from the detection device and delivers an electrical signal to a user or a photo taking system upon exceeding a speed threshold.

Description

DESCRIPTIONDESCRIPTION

La présente invention concerne un dispositif de mesure de vitesse qui valide la mesure d'un cinémomètre de contrôle routier, lorsque ce dernier est monté sur un support non rigide ( type portique ou potence par exemple). Ce dispositif est un complément des systèmes routiers de contrôle I sanction automatisés.  The present invention relates to a speed measuring device that validates the measurement of a road control speedometer, when the latter is mounted on a non-rigid support (gantry type or gallows for example). This device is a complement of automated control I sanctioned road systems.

II existe des dispositifs cinémométriques de mesure de vitesse de véhicules, destinés au contrôle et à l'éventuelle verbalisation des conducteurs. Ces dispositifs cinémométriques doivent être fixés à un support immobile afin de ne pas fausser la vitesse mesurée. Leur vitesse instantané est la somme de la vitesse du mobile, avec la vitesse du support. Lorsque le support n'est pas immobile, il est nécessaire d'en connaître la vitesse instantanée afin soit de l'additionner à celle du mobile contrôlé, soit d'invalider la mesure du cinémomètre si celle du support est plus importante que la différence entre les performances réelles du cinémomètre et la tolérance admise par les décrets d'homologation. Lors des installations des dispositifs sur des supports non rigides tels que portiques potences ou autres passerelles au-dessus des voies routières ces considérations doivent être prises en compte.  There are speed measuring devices of vehicles, intended for the control and the eventual verbalization of the drivers. These speed measuring devices must be fixed to an immobile support so as not to distort the measured speed. Their instantaneous speed is the sum of the speed of the mobile, with the speed of the support. When the support is not immobile, it is necessary to know the instantaneous speed in order to add it to that of the controlled mobile, or to invalidate the measurement of the speedometer if that of the support is greater than the difference between the actual performance of the speedometer and the tolerance allowed by the homologation decrees. When installing devices on non-rigid supports such as gantry cranes or other bridges over roadways these considerations must be taken into account.

Le dispositif selon l'invention est un boîtier qui peut être installé sur le cinémomètre ou son propre support, il mesure à l'aide d'un accéléromètre la vitesse instantanée du support sur lequel il est fixé. Le signal de mesure issu du cinémomètre est soit validé soit invalidé en fonction de la vitesse comparée au seuil prédéterminé. Le dispositif peut également transmettre un signal électrique à l'usage de l'utilisateur ou du système automatisé. Le seuil est programmé au montage du dispositif, il est spécifique à un modèle de radar.  The device according to the invention is a housing that can be installed on the speedometer or its own support, it measures with the aid of an accelerometer the instantaneous speed of the support on which it is fixed. The measurement signal from the speedometer is either validated or invalidated according to the speed compared to the predetermined threshold. The device may also transmit an electrical signal for use by the user or the automated system. The threshold is programmed when mounting the device, it is specific to a radar model.

Le dispositif selon l'invention est composé des éléments suivants: - un accéléromètre dont l'axe de mesure est parallèle à l'axe de déplacement du véhicule contrôlé. l'ajustement de l'axe peut être fait mécaniquement ou électroniquement par introduction d'un facteur de correction qui correspond à la valeur de projection de l'axe réel sur l'axe de déplacement du mobile. La bande passante couvre le spectre de fréquence depuis zéro hertz jusqu'à minimum deux fois la fréquence correspondante à la période d'établissement de la mesure du cinémomètre.  The device according to the invention is composed of the following elements: an accelerometer whose measuring axis is parallel to the axis of movement of the controlled vehicle. the adjustment of the axis can be done mechanically or electronically by introducing a correction factor which corresponds to the projection value of the real axis on the axis of movement of the mobile. The bandwidth covers the frequency spectrum from zero hertz up to at least twice the frequency corresponding to the period of establishment of the speedometer measurement.

- un module électronique qui numérise la mesure d'accélération suivant une fréquence d'échantillonnage importante par rapport au temps d'établissement de la mesure du cinémomètre.  an electronic module which digitizes the acceleration measurement according to a large sampling frequency with respect to the time of establishment of the speedometer measurement.

- un module électronique qui calcule en temps réel suivant la méthode des intégrations successives de l'accélération, la vitesse instantanée correspondante.  an electronic module which calculates, in real time according to the method of successive integrations of the acceleration, the corresponding instantaneous speed.

- un module électronique qui compare la vitesse mesurée à la tolérance admise - Un module électronique qui reçoit et retransmet le signal du cinémomètre vers l'utilisateur, et qui a la capacité de l'interrompre en cas de dépassement de la tolérance admise.  - an electronic module that compares the measured speed to the accepted tolerance - An electronic module which receives and retransmits the signal from the speedometer to the user, and which has the capacity to interrupt it if the tolerance is exceeded.

- Un module électronique qui délivre un signal électrique vers l'utilisateur, en cas de 40 dépassement de la tolérance admise.  - An electronic module that delivers an electrical signal to the user, in case of exceeding the tolerance allowed.

Claims (3)

REVENDICATIONS 1) Dispositif de validation des cinémomètres routiers montés sur support non rigide caractérisé en ce que le calcul de la vitesse du support est réalisée par un accéléromètre associé une carte électronique qui calcule la vitesse instantanée par la méthode des intégrations successives. Le dispositif est mécaniquement solidaire du cinémomètre.  1) Device for validating road cinemometers mounted on non-rigid support, characterized in that the calculation of the speed of the support is performed by an accelerometer associated with an electronic card which calculates the instantaneous speed by the method of successive integrations. The device is mechanically secured to the speedometer. 2) Dispositif selon la revendication 1 caractérisé en ce que le dispositif peut interrompre le signal issue du cinémomètre, en cas de dépassement d'un seuil de vitesse.  2) Device according to claim 1 characterized in that the device can interrupt the signal from the speedometer, if exceeding a speed threshold. 3) Dispositif selon la revendication 1 caractérisé en ce que le dispositif peut délivrer un signal électrique, en cas de dépassement du seuil.  3) Device according to claim 1 characterized in that the device can deliver an electrical signal, in case of exceeding the threshold.
FR0311850A 2003-10-08 2003-10-08 Vehicle speed measuring device for validating measurement of speed detection device, has accelerometer to calculate instantaneous speed, where measuring device interrupts signal coming from detection device upon exceeding speed threshold Pending FR2860875A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0311850A FR2860875A3 (en) 2003-10-08 2003-10-08 Vehicle speed measuring device for validating measurement of speed detection device, has accelerometer to calculate instantaneous speed, where measuring device interrupts signal coming from detection device upon exceeding speed threshold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0311850A FR2860875A3 (en) 2003-10-08 2003-10-08 Vehicle speed measuring device for validating measurement of speed detection device, has accelerometer to calculate instantaneous speed, where measuring device interrupts signal coming from detection device upon exceeding speed threshold

Publications (1)

Publication Number Publication Date
FR2860875A3 true FR2860875A3 (en) 2005-04-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR0311850A Pending FR2860875A3 (en) 2003-10-08 2003-10-08 Vehicle speed measuring device for validating measurement of speed detection device, has accelerometer to calculate instantaneous speed, where measuring device interrupts signal coming from detection device upon exceeding speed threshold

Country Status (1)

Country Link
FR (1) FR2860875A3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100543795C (en) * 2006-11-10 2009-09-23 广东省计量科学研究院 A kind of method of inspection of speed-measuring system of highway and device thereof
CN102163369A (en) * 2010-02-24 2011-08-24 交通运输部公路科学研究所 Road running speed acquisition system
CN107545738A (en) * 2016-10-31 2018-01-05 郑州蓝视科技有限公司 A kind of highway section speed-measuring method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100543795C (en) * 2006-11-10 2009-09-23 广东省计量科学研究院 A kind of method of inspection of speed-measuring system of highway and device thereof
CN102163369A (en) * 2010-02-24 2011-08-24 交通运输部公路科学研究所 Road running speed acquisition system
CN107545738A (en) * 2016-10-31 2018-01-05 郑州蓝视科技有限公司 A kind of highway section speed-measuring method

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