DE102006012325A1 - Sensor for detecting position and acceleration changes, has ring sensor, where individual pixels of ring sensor are programmed such that position with respect to system-focal point and vehicle axis is communicated to processor - Google Patents

Abstract

The sensor has LEDs (2,7), and the electromagnetic radiation of the LEDs radiates through a gaseous display medium (11) by reflection on an inner wall (9) of a barrel-shaped level housing (4) such that the congruent damping image of the medium is impinged on a charge coupled device (CCD)-ring sensor (3). The individual pixels of the ring sensor are programmed such that the position with respect to a system-focal point and a vehicle axis is communicated to a processor.

Description

The The invention relates to a sensor according to the preamble of Patent claim 1.

In the prior art such sensors z. B. by the DE 196 04 255 C2 and the DE 38 15 938 C2 known and are in various embodiments - in particular for the occupant protection of vehicles - produced.

Of the Invention is based on a small-sized multifunctional task Introduce sensor that is simple and safe and fast Recognition of position and acceleration changes to be detected with high resolution and big Sensitivity up to every 360 ° position change in the vehicle longitudinal axis direction and Vehicle transverse axis direction allows.

According to the invention this Task by a sensor according to the features of the main claim 1 solved.

In The following is the invention with reference to a preferred embodiment described in conjunction with four drawings. Showing:

1 , a simplified sectional view of the sensor ( 1 ).

In a preferred embodiment, a barrel-shaped bubble housing ( 14 ) with the transparent liquid ( 12 ), which in horizontal rest position each at its geodetically highest point a gaseous display medium ( 11 ) in the form of a small gaseous lens. The ends of the barrel-shaped dragonfly housing ( 4 ), the light-emitting diodes ( 2 . 7 ) with the integral prism layers ( 8th . 14 ) for light scattering and the integral LED reflector surfaces ( 15 . 16 ), wherein the edges of the prism layers ( 8th . 13 ) are aligned so that the electromagnetic radiation emitted by them ( 10 ) on the inner wall ( 9 ), which may also be coated with partially permeable substances for this purpose, is reflected so that the gaseous display medium ( 11 ) a high-contrast attenuation map ( 5 ) of the display medium ( 11 ) on the CCD ring sensor ( 3 ) whose values can then be calculated using known evaluation electronics. The sensor ( 1 ) is designed to protect against reading-distorting external effects of light protected against light, so that only the light-emitting diodes ( 7 . 14 ) formed and reflected monochromatic electromagnetic radiation ( 10 ) on the sensor field of the CCD ring sensor ( 3 ) or a similarly effective sensor. The individual pixels of the CCD ring sensor ( 3 ) programmed so that their location is known to the computer to the geometric locations of the spatial planes and vehicle axes.

2 a simplified sectional view of the sensor ( 1 ) With its rotation by 90 ° in the vehicle longitudinal direction or in the vehicle transverse axis direction.

In order to detect a rollover of a vehicle in the direction of travel or in the opposite direction of travel by 90 °, the gaseous display medium (FIG. 20 ) into the geodetically highest position, which belongs to these situations, namely to the final 18 . 19 ) stream. In these end positions, the achievement or exceeding of the 90 ° angle or the rollover area can be detected. In order to certainly increase the data for its evaluation, especially in this important border region, the light-emitting diodes ( 7 . 15 ) are basically operated dynamically and preferably operate as sensory transmitting and receiving diodes.

3 a simplified sectional view of another embodiment of the sensor ( 1 ) with only one planar CCD sensor.

In this embodiment, the reflector coating (FIG. 32 ) reflected electromagnetic radiation ( 10 ) in the form of the attenuation mapping section ( 34 ) by the limiting reflector window strips ( 33 ) laterally exactly limited on the CCD sensor ( 30 ).

4 a simplified sectional view of another embodiment of the sensor ( 1 ), in which the reflected electromagnetic radiation ( 42 . 43 ) through the light emitting diodes ( 40 . 46 ) directly into the transparent barrel-shaped dragonfly housing ( 4 ) is blasted and reflected there, so that the CCD front sensors ( 41 . 45 ) further optimal data in the turning region of the gaseous display medium ( 11 ) deliver.

1

sensor

2

led

3

CCD sensor ring

4

barrel-shaped dragonfly housing

 5

Bedämpfungsabbildung

6

CCD contacts

 7

led

8th

prism layer

 9

inner wall

10

reflected electromagnetic radiation

 11

gaseous display medium

12

liquid

13

prism layer

14

LEDs contacts

15

integral LED reflector surface

16

integral LED reflector surfaces

17

partially reflecting coating

18

end stop

 19

end stop

20

gaseous display medium

 30

CCD sensor

31

Window reflector edge

32

reflector coating

33

Window reflector strips

 34

Bedämpfungsabbildung

40

led

41

CCD sensor forehead

42

reflected electromagnetic radiation

43

reflected electromagnetic radiation

45

CCD sensor forehead

46

led

Claims (14)

Sensor for detecting changes in position and acceleration by a liquid in a closed housing with a gaseous display element in the longitudinal axis and transverse axis direction, characterized in that a transparent barrel-shaped dragonfly housing ( 4 ) with flat, semicircular or oval shaped end stops ( 18 . 19 ) and the transparent or partially transparent or partially or totally reflecting liquid ( 12 ) therein, at its respective ends the static and / or dynamic and synchronous or alternately operating as sensory transmitting and receiving diodes light emitting diodes ( 7 . 14 ) with the integral prism layers ( 8th . 13 ), whereby the thereby deflected electromagnetic radiation ( 10 ) of the light-emitting diodes ( 2 . 7 ) by the reflections on the inner wall ( 9 ) of the barrel-shaped dragonfly housing ( 4 ) in each case by the gaseous display medium ( 11 ) radiates that the associated congruent attenuation map ( 5 ) of the display medium ( 11 ) metrologically evaluable on the CCD ring sensor ( 3 ), wherein the individual pixels of the CCD ring sensor ( 3 ) are programmed so that their location is known to the geometric locations of the spatial planes or vehicle levels and with respect to the system center of gravity and the vehicle axes of the computer. Sensor according to claim 1, characterized in that the inner wall ( 9 ) of the barrel-shaped dragonfly housing ( 4 ) with integral prisms for deflecting the electromagnetic radiation ( 10 ) is provided. Sensor according to claim 1 and 2, characterized in that the CCD ring sensor ( 3 ) is constructed homogeneously or composed of several individual sensors. Sensor according to claim 1 and 3, characterized in that the barrel-shaped dragonfly housing ( 4 ) Is replaced by a balljoint housing, with more than two light-emitting diodes, but in particular 6 light-emitting diodes distributed segmentally symmetrically in the wall can be introduced. Sensor according to Claims 1 and 4, characterized in that only one light-emitting diode ( 2 ) or LED ( 7 ) is used or that they are replaced by laser diodes. Sensor according to claim 1 and 5, characterized in that the inner wall ( 9 ) with a partially reflecting coating ( 17 ) is coated. Sensor according to claim 1 and 6, characterized in that the CCD ring sensor ( 3 ) is replaced by a sensor for electromagnetic radiation in a different technology. Sensor according to claim 1 and 7, characterized in that the CCD ring sensor ( 3 ) or a corresponding sensor for detecting electromagnetic radiation of the curve of the barrel-shaped of the inner wall ( 9 ) of the barrel-shaped dragonfly housing ( 4 ) follows the same distance. Sensor according to claim 1 and 8, characterized in that the CCD ring sensor ( 3 ) or a corresponding sensor and the light-emitting diodes ( 2 . 7 ) integral or physical or chemical-physical component of the barrel-shaped dragonfly housing ( 4 ). Sensor according to Claims 1 and 9, characterized in that the light-emitting diodes ( 2 . 7 ) may have the same color or may also have different colors. Sensor according to claim 1 and 10, characterized in that the partially reflecting coating ( 17 ) by a totally reflecting reflector coating ( 32 ) replacing the reflector window strip ( 33 ) through the reflector window edges ( 31 . 31 ' ) is bounded laterally. Sensor according to Claims 1 and 11, characterized in that the prism layers ( 8th . 13 ) by integral prism layers on the end stops ( 18 . 19 ) be replaced. Sensor according to Claims 1 and 12, characterized in that the light-emitting diodes ( 40 . 46 ) the reflected electromagnetic radiation ( 42 . 43 ) directly into the wall of the transparent barrel-shaped dragonfly housing ( 4 ), so that the frontal position of the gaseous display medium ( 11 ) from the CCD front sensors ( 41 . 45 ) can be detected. Sensor according to claim 1 and 13, characterized in that the reflected electromagnetic radiation ( 10 . 42 ) by optical conductors directly into the barrel-shaped dragonfly housing ( 4 ) or mechanically the CCD ring sensor ( 3 ) and / or the CCD front sensors ( 41 . 45 ) penetrating into the barrel-shaped dragonfly housing ( 4 ) to be led.