DE209881C - - Google Patents
Info
- Publication number
- DE209881C DE209881C DENDAT209881D DE209881DA DE209881C DE 209881 C DE209881 C DE 209881C DE NDAT209881 D DENDAT209881 D DE NDAT209881D DE 209881D A DE209881D A DE 209881DA DE 209881 C DE209881 C DE 209881C
- Authority
- DE
- Germany
- Prior art keywords
- mirror
- observed
- vehicle
- image
- curved
- 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.)
- Active
Links
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/12—Instruments for setting out fixed angles, e.g. right angles
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Road Signs Or Road Markings (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Vorliegende Erfindung besteht aus einem Apparat, mit welchem auf Fahrstraßen sich bewegende Fahrzeuge o. dgl. fortlaufend beobachtet werden können.The present invention consists of an apparatus with which on driveways moving vehicles or the like can be continuously observed.
In Fig. ι sei A das zu beobachtende Fahrzeug , e die Fahrbahn desselben,X = A-B die Strecke, auf welcher es beobachtet wird, C der Standort, von wo es beobachtet wird, und gleichzeitig der Scheitelpunkt des Gesichtswinkeis γ, durch den das Fahrzeug sich bewegt. In FIG. 1 let A be the vehicle to be observed, e its lane , X = AB the route on which it is observed, C the location from where it is observed, and at the same time the vertex of the visual angle γ through which the vehicle moves.
Die Ausführung des Apparates ist aus Fig. 2 und 3 ersichtlich. In einem Winkel γ (Fig. 3) ist ein gebogener oder facettenartiger Spiegel / (Fig. 2), der in der Projektion aus Fig. 3 zu erkennen ist und dessen spiegelnde Fläche nach unten zeigt, geneigt angeordnet, so daß er das Bild des zu beobachtenden Fahrzeuges A nach unten auf einen ebenen Spiegel g, dessen spiegelnde Fläche nach oben gerichtet ist, nach H reflektiert und wiederum schräg nach oben in das Auge i des Beobachters wirft. Der die Beobachtung Ausführende wird das Bild des Fahrzeuges A etwa im Punkt K (Fig. 3) im ebenen Spiegel g eintreten, in gebogener Bahn K-L-M (Fig. 3) vorbeifahren und im Punkt M (Fig. 3) austreten sehen. Die Bahn K-L-M entspricht der Strecke A-B (Fig. 3). Wird noch mit Hilfe einer Uhr die Zeit bestimmt, die das Fahrzeug zur Zurücklegung des Weges χ gebraucht hat, so ergibt sich ohne weiteres die Geschwindigkeit des Fahrzeuges. Der Apparat kann demnach zur Kontrolle der Geschwindigkeit von Fahrzeugen Anwendung finden.The design of the apparatus is shown in FIGS. 2 and 3. At an angle γ (Fig. 3) a curved or facet-like mirror / (Fig. 2), which can be seen in the projection from Fig. 3 and whose reflective surface points downward, is arranged inclined so that it shows the image of the to be observed vehicle A downwards onto a flat mirror g, the reflective surface of which is directed upwards, reflected towards H and again throws obliquely upwards into the observer's eye i. The person carrying out the observation will see the image of the vehicle A enter approximately at point K (FIG. 3) in the plane mirror g , pass it in a curved path KLM (FIG. 3) and see it exit at point M (FIG. 3). The path KLM corresponds to the route AB (Fig. 3). If the time it took the vehicle to cover the distance χ is determined with the aid of a clock, the speed of the vehicle is readily obtained. The apparatus can therefore be used to control the speed of vehicles.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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DE209881C true DE209881C (en) |
Family
ID=471817
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT209881D Active DE209881C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE209881C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5101627A (en) * | 1989-01-31 | 1992-04-07 | Kabushiki Kaisha Kobe Seiko Sho | Adjustable flow-combining restrictor for hydraulic excavator dual pump circuit |
-
0
- DE DENDAT209881D patent/DE209881C/de active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5101627A (en) * | 1989-01-31 | 1992-04-07 | Kabushiki Kaisha Kobe Seiko Sho | Adjustable flow-combining restrictor for hydraulic excavator dual pump circuit |
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