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 PDFInfo
- 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
- Authority
- 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
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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
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- 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
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- 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
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)
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
ID=34355370
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 |
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FR (1) | FR2860875A3 (en) |
Cited By (3)
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 |
-
2003
- 2003-10-08 FR FR0311850A patent/FR2860875A3/en active Pending
Cited By (3)
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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