CH590746A5 - Sensor providing signal proportional to vehicle speed - has spindle with hole rotating in front of lamp to activate photoelectric cell - Google Patents
Sensor providing signal proportional to vehicle speed - has spindle with hole rotating in front of lamp to activate photoelectric cellInfo
- Publication number
- CH590746A5 CH590746A5 CH1194075A CH1194075A CH590746A5 CH 590746 A5 CH590746 A5 CH 590746A5 CH 1194075 A CH1194075 A CH 1194075A CH 1194075 A CH1194075 A CH 1194075A CH 590746 A5 CH590746 A5 CH 590746A5
- Authority
- CH
- Switzerland
- Prior art keywords
- sensor
- lamp
- vehicle
- photoelectric cell
- axis
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/486—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by photo-electric detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Distances Traversed On The Ground (AREA)
Abstract
The system is used to provide an electrical signal proportional to the speed of the vehicle in which it is fitted. It comprises a continuously illuminated lamp, having a focused beam shining onto a hole drilled diametrically through a spindle. This is connected to the mileometer in the vehicle and is rotated by the same mechanism. It is placed in a plane vertical to the lamp, the beam being cut as the spindle rotates. The light activates a photoelectric cell positioned in front of the hole, the signals, digital or analogue, being converted by a high gain amplifier.
Description
La présente invention a pour objet un capteur fournissant un signal de fréquence proportionnelle à la vitesse d'un véhicule. On connaît déjà ce mode de construction. Les capteurs réalisés sont dans la plupart des cas basés sur un système électromécanique ou électromagnétique.
Les capteurs électromécaniques sont de par leur construction encombrants et lourds, tandis que les capteurs électromagnétiques sont d'un état critique dû aux courants électriques importants circulant dans les véhicules.
L'invention a pour but d'augmenter la fiabilité et de diminuer les dimensions du systéme.
Dans le capteur selon l'invention, une cellule photo-électrique fournissant un signal à un amplificateur, la cellule photo-électrique étant excitée par une lampe disposée en face de celle-ci, le faisceau de lumière étant coupé au moyen d'un axe troué, placé dans un plan perpendiculaire au faisceau émis par la lampe. L'axe étant entraîné par le câble du compteur kilométrique du véhicule.
De préférence le capteur fournira un signal de sortie digital ou analogique.
De préférence l'axe du capteur comportera au moins un trou.
De préférence le capteur sera incorporé ou extérieur aux compteurs kilométriques des véhicules.
La fig. 1 représente le schéma électronique du capteur.
Le capteur comprend une lampe 1, une cellule photo-électrique 2, et un amplificateur à grand gain 3.
REVENDICATION
Capteur fournissant un signal de fréquence proportionnelle à la vitesse d'un véhicule, caractérisé par le fait qu'il comprend une cellule photo-électrique fournissant un signal à un amplificateur, la cellule photo-électrique étant excitée par une lampe disposée en face de celle-ci, le faisceau de lumiére étant coupé au moyen d'un axe troué, placé dans un plan perpendiculaire au faisceau émis par la lampe, I'axe étant entraîné par le câble du compteur kilométrique du véhicule.
SOUS-REVENDICATIONS
1. Capteur selon la revendication, caractérisé par le fait qu'il comporte un convertisseur pour fournir un signal de sortie digital.
2. Capteur selon la revendication ou la sous-revendication 1, caractérisé par le fait que l'axe comporte plusieurs trous.
**ATTENTION** fin du champ DESC peut contenir debut de CLMS **.
The present invention relates to a sensor providing a frequency signal proportional to the speed of a vehicle. We already know this method of construction. The sensors produced are in most cases based on an electromechanical or electromagnetic system.
Electromechanical sensors are bulky and heavy by their construction, while electromagnetic sensors are in critical condition due to the large electric currents flowing in vehicles.
The object of the invention is to increase reliability and to reduce the dimensions of the system.
In the sensor according to the invention, a photoelectric cell supplying a signal to an amplifier, the photoelectric cell being excited by a lamp arranged in front of it, the light beam being cut by means of an axis perforated, placed in a plane perpendicular to the beam emitted by the lamp. The axle being driven by the vehicle's odometer cable.
Preferably the sensor will provide a digital or analog output signal.
Preferably the axis of the sensor will include at least one hole.
Preferably the sensor will be incorporated or external to the vehicle odometers.
Fig. 1 represents the electronic diagram of the sensor.
The sensor includes a lamp 1, a photocell 2, and a high gain amplifier 3.
CLAIM
Sensor supplying a signal of frequency proportional to the speed of a vehicle, characterized in that it comprises a photoelectric cell supplying a signal to an amplifier, the photoelectric cell being excited by a lamp placed in front of that here, the beam of light being cut by means of a perforated axis, placed in a plane perpendicular to the beam emitted by the lamp, the axis being driven by the cable of the vehicle's odometer.
SUB-CLAIMS
1. Sensor according to claim, characterized in that it comprises a converter to provide a digital output signal.
2. Sensor according to claim or sub-claim 1, characterized in that the axis has several holes.
** ATTENTION ** end of DESC field can contain start of CLMS **.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1194075A CH590746A5 (en) | 1975-09-15 | 1975-09-15 | Sensor providing signal proportional to vehicle speed - has spindle with hole rotating in front of lamp to activate photoelectric cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1194075A CH590746A5 (en) | 1975-09-15 | 1975-09-15 | Sensor providing signal proportional to vehicle speed - has spindle with hole rotating in front of lamp to activate photoelectric cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH590746A5 true CH590746A5 (en) | 1977-08-31 |
Family
ID=4378320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1194075A CH590746A5 (en) | 1975-09-15 | 1975-09-15 | Sensor providing signal proportional to vehicle speed - has spindle with hole rotating in front of lamp to activate photoelectric cell |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH590746A5 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2470968A1 (en) * | 1979-12-06 | 1981-06-12 | Europ Propulsion | Optical rotation detector for vehicle speedometer cable - uses light source and photodetector adaptor section to provide logic signals |
-
1975
- 1975-09-15 CH CH1194075A patent/CH590746A5/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2470968A1 (en) * | 1979-12-06 | 1981-06-12 | Europ Propulsion | Optical rotation detector for vehicle speedometer cable - uses light source and photodetector adaptor section to provide logic signals |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased | ||
| PL | Patent ceased |