DE3023450A1 - CONTROL DEVICE FOR THE SPEED OF AUTOMOBILES - Google Patents

Description

Automobile speed control device

The present invention relates to a control device for the speed of automobiles.

Devices of this type consist of a speedometer in connection with a camera with which the vehicle is photographed while measuring its speed.

The measuring device is usually a radar, generally a cinemometer called, and the camera is equipped with a flash so that you can take pictures of the vehicles even if that natural light is not enough, especially at night.

These types of devices allow a speed limit to be imposed To photograph the crossing vehicle and at the same time that of the measuring device at the time of the photograph recorded speed on the photo. To be useful, such devices must allow photographs to be taken that are clear enough to show the vehicle to be able to identify, in particular his police registration number and possibly his driver.

030Ö63 / ~ 0823

For this reason, devices have been developed with relative concentrated and powerful flash light to get clear photos during night speed controls.

Since the flash light is relatively focused and strong, and thus could dazzle the driver when he is being photographed, the users are such devices are forced to avoid photos from the front, thereby impairing the clarity of the obtained photograph.

In order to eliminate the risk of dazzling , various devices have been proposed for controlling vehicle speeds in which the camera is not equipped with a flashlight, but uses infrared-sensitive film. The main disadvantage of such devices lies in the fact that infrared films are very sensitive to handling and the equipment required for their development is not widely available and therefore, for practical and economic reasons, cannot be used by the services using control devices such as the Police.

The purpose of the present invention is to address the disadvantages of Switch off devices according to the known technology and propose a novel device that allows Carry out speed measurements from the front without the guide of the vehicle to dazzle using normal photographic Film while getting photos that are clear enough, even at night, to read the license plate number of the vehicle in the picture to be able to. 030063/0823

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More specifically, the present invention proposes a speed control device before, consisting of a speedometer in connection with one equipped with a flashlight Camera for taking photos of the vehicle during the speed measurement, which is characterized in that the flash light is provided with a blue filter.

Although it is possible to use any type of optical blue filter, it is preferable to use filters which are capable of absorbing light with a wavelength between Let about 400 and 500 nm pass and visible light with wavelengths absorb between approx. 55o and 7oo nm.

A number of night shots were taken with black and white and color film of different sensitivities Flash light was provided with a blue optical filter as indicated above. It was found that even with films photos were obtained which were clear enough to indicate the license plate number of the vehicle being photographed from the usual sensitivity read while the flash of the flash was only weakly visible, and the driver was not dazzled when taking pictures directly from the front.

It goes without saying that the speed control device otherwise retains the characteristics of the known devices.

Further features and advantages of the invention are explained with reference to the accompanying drawing, which represents a non-exclusive embodiment according to the teaching of the invention will. 030063/0823

The single figure shows schematically one according to the invention Speed control device that stands on the side of the road.

The attached drawing shows a street 1o on which a motor vehicle. 12 travels in the direction of arrow F. The speedometer 14, which is a radar measuring device of the cinemometer type, is set up on the side of the road. Behind the measuring device 14 of the road 10 is a camera _f placed at the edge 16 which is equipped with a flash light eighteenth The camera 16 is designed so that it is triggered when the vehicle 12 is about 30 m away from it, at the moment when the measuring device 14 measures the speed. The camera 16 can either be triggered by an operator, or automatically / if the speed determined by the measuring device 14 exceeds a certain, previously set value at which the vehicle must be regarded as exceeding the speed limit. The camera 16 enables recordings of the vehicle directly from the front, which also show the speed determined by the measuring device 14 at the moment of the photograph. The device described thus has the features of devices of a known type.

The difference of the device according to the invention consists in the The fact that the flashlight 18 is equipped with an optical blue filter 2o, which reduces the risk of dazzling the driver of the Vehicle when taking photos.

Although any optical blue filter can be used, it is preferred to use a filter which absorbs light with wavelengths transmits between approx. 400 and 5oo nm and absorbs visible light with wavelengths of approx. 55o to 7oo nm. As not An exclusive example of a filter that can be used for this purpose is the optical filter No. 533o from CORNING to be named.

Surprisingly, it turns out that the use of a Such an optical blue filter gives a flash of a flash which is only faintly noticeable and does not dazzle, and that the photos are clear enough to indicate the identifying features of the photographed Vehicle to be recognized, even when using black and white or color films of the usual sensitivity / as shown by the Police are used.

Of course, the invention is not limited to the particularly described embodiment, which is also in the Drawing is shown and it is possible to work out other variants within the scope of the teaching of the invention. E.g. the installation of the measuring device and the camera in the same place or in different places, be it on the side of the road or on a bridge, as is generally known. Likewise, the measuring device is not suitable for cinemometer-type devices limited.

Ö3QÖ63 / Q823

Claims (2)

PATFNTAN'WALTE DFUNG. G. RiEBLING DR.-ING. P. ^RIEBLING 3Q23A5D Dipl.-lng. Ing. (Grad.) Dipl.-lng. OUiOHQU Zuue'assene νθ ' ^(ι ^ ΐβ' neir ^ Eu ^ paischi.-n Pa'eniam 'ofessiona! Representatives ^ eiotn European Paie ^ t Q' Mandataires agrees pres ι Of''cti europee ^ des brevets My sign S 521-ku Please repeat the answer L J Your sign your message-chi vo.- D-8990 Lindau (Bodensee) Race 10 P.O. Box 3160 2o. June 198o Subject: Applicant: Societe De Fabrication D ¹ Instruments De Mesure (SFIM), 13, Avenue Marcel Ramolfo-Garnier, 913o1 Massy / France Claims 1.] Speed control device for motor vehicles, formed by a speedometer which is connected to a a camera equipped with a flashlight is connected to take photos of the vehicle while measuring the speed, characterized in that the flashlight is equipped with an optical blue filter is. 2. Device according to claim 1, characterized characterized in that the filter transmits light with wavelengths between approx. 4oo and 5oo nm and is visible Light with wavelengths between approx. 55o and 7oo nm is absorbed. 030083/0823 Telephones: Telegraph Teleqramm-Adresse Bank accounts ^ ^ Postal checking account Lindau! 0838216917 054374 (paltll paln-lmdau Bayer Vereinsbank Lindau (BI No. 1208578 (BLZ 73520074) Munich 29525-809 Hypo Bank Lindau (B) Nr 6670-278920 (BLZ 73520642) Voiksbank Lindau (B) Nr 51 720000 (BLZ 735901 20) -2-