DE202011102512U1 - anti-trap - Google Patents

Abstract

Anti-trap system for an adjusting part (1) adjustable between an opening position (x0) and a closing position (x5) along an adjustment path (x) for closing an opening (8) of a motor vehicle with -. an electric drive (2) which is designed and set up to move the adjustment part (1) along the adjustment path (x) between the opening position (x0) and the closing position (x5) via an associated adjustment mechanism (3); at least one transmission device (5, 5 ') for emitting terahertz waves (9) at least over sections of the adjustment path (x), -; at least one receiving device (6, 6 ', 6' ') assigned to the transmitting device (5, 5') for receiving terahertz waves (9) in the adjustment path (x), -; a control device (4) connected to the receiving device (6, 6 ', 6' '), which is designed and set up to evaluate the terahertz waves (9) received by the receiving device (6, 6', 6 '') to determine whether there is an obstacle (13) in the adjustment path (x) or not, and a movement of the adjustment part (11), in particular in the direction of the ...

Description

The invention relates to a anti-trap system.

Anti-pinch systems are in the field of automotive technology z. B. for electrically powered windows, sunroofs, sliding doors or tailgates known. Such systems are used to avoid trapping of persons when closing an adjustment of a motor vehicle and thus prevent injury.

The prior art is exemplified in the DE 40 30 607 A1 referenced, which discloses an operating according to the radar anti-pinch protection system.

The object of the invention is to provide an anti-pinch system, with which injuries to persons when adjusting an adjustment of a motor vehicle can be safely avoided.

This object is achieved by a system having the features of claim 1. Advantageous embodiments are the subject of the dependent claims.

According to the invention, the term "terahertz waves" denotes waves with an electromagnetic spectrum between microwaves and infrared radiation, in particular in the range from 0.1 to 10 terahertz (THz). Terahertzwellen can z. B. by means of an electronic device with an oscillator and a Schottky diode are generated. It is also possible to generate and radiate the terahertz waves opto-electronically or purely optically, in particular by means of a laser and an associated optical system. As a recipient can / can z. B. serve one or more Golay cells. Reference is made by way of example to the publication of University of Bonn "Terahertzwellen: Gold Mine for Science and Technology" (Buse, Breunig); available at: http://www.photonik.uni-bonn.de/bilingual/Vorlesungen/photonik_ws0809/Terahertz.pdf ,

According to the invention, an anti-pinch system is provided for an adjustable between an open position and a closed position along an adjustment Verstellteil for closing an opening of a motor vehicle, which is an electric drive, which is designed and arranged, the adjusting part via an associated adjustment between the open position and to move the closing position along the displacement, at least one transmitting device for emitting terahertz waves at least over sections of Verstellwegs, at least one of the transmitting device associated receiving means for receiving terahertz waves in Verstellweg and connected to the receiving means control means which is adapted and arranged to Evaluate terahertz waves received by the receiving device to determine whether or not an obstacle is in the adjustment path, and a movement of the adjustment s, in particular in the direction of the closed position, to stop and / or reversed when it is detected by the control device that an obstacle is in the adjustment path.

The system according to the invention advantageously operates without contact. It can thus pinching an obstacle, especially the hand of a person completely avoided. The adjustment reverses already at a time before the actual pinching. The terahertz waves have no ionizing effect and are low in energy. There is no health risk for humans. Since terahertz waves are strongly absorbed by water in particular, obstacles in the form of human body parts can be detected particularly reliably.

According to one embodiment of the invention, it is provided that the control device is designed and set up to use a signal intensity of the received terahertz waves as a measure of whether an obstacle is in the adjustment path of the adjustment part, wherein an obstacle is detected if the measure has a predetermined threshold value reached and / or falls below. For this purpose, the control device can compare the signal intensity currently measured by the receiving device with a threshold value. If the receiving device comprises several (two or more) receivers, the current value may be a sum of the individual values. Alternatively, by looking at a plurality of temporally successive values, a course of the signal intensity can be determined and compared with a predetermined reference curve. Upon reaching and / or falling below a predetermined threshold, it is concluded that an obstacle is in the adjustment path. The movement of the adjustment, in particular in the direction of the closed position, is then stopped and / or reversed. To z. B. false triggering (so-called. Mis-reversing), in particular by noise components of the signals and / or short-term interference to avoid, it is conceivable that the threshold for a certain time or a certain number of measurements must be reached and / or fallen below. It can, for. B. when first reaching or falling below the threshold, a timer (of, for example, 50 ms) are started. If, after expiry of the timer, the threshold value is still reached or undershot, an obstacle is detected and the adjustment movement is stopped and / or reversed.

According to a further embodiment of the invention, the transmitting device and the receiving device are disposed substantially opposite one another so that the receiving device at least partially receives the terahertz waves emitted by the transmitting device when there is no obstacle in the adjusting path. As soon as an obstacle is in the adjustment path, the signal intensity of the terahertz waves received by the reception device drops as a result of at least partial absorption of the terahertz waves by the obstacle.

According to a further embodiment of the invention, the transmitting device and / or the receiving device is / are arranged in a slotted line. This makes it possible to easily mount the transmitting or receiving device.

In accordance with a further embodiment of the invention, the receiving device is assigned a monitoring area covering the opening at least in sections, and the receiving device is designed and set up to scan the monitoring area for receiving terahertz waves, in particular cyclically. This makes it possible to monitor only the range of Verstellwegs in which the anti-trap is effective. It may be z. B. to act the last third of the adjustment in the direction of the closed position. Furthermore, the cyclic scanning allows the use of receiving devices that can only partially view the monitoring area. By the cyclic scanning, in particular by means of an electronic displacement of the associated monitoring area and / or a mechanical pivotal movement of the receiving device, the reliability of the system can be further improved. Furthermore, this allows the use of relatively cheaper receiving devices and thus a cost-effective overall system.

According to a further embodiment of the invention, the control device is designed and configured to control the receiving device so that the receiving device scans the monitoring area only when the adjusting moves in the direction of the closed position. This feature takes into account the fact that there is a risk of entrapment, especially during the shooting movement of the adjustment. However, it is also possible in principle to apply the system according to the invention to the opening process of adjusting parts.

According to one embodiment of the invention, the transmitting device and / or the receiving device is / are arranged on the adjusting part. The transmitting or receiving device is / are moved together with the adjustment. This embodiment offers the particular advantage that the adjustment itself can not be recognized as an obstacle.

According to one embodiment of the invention, the transmitting device and / or the receiving device is / are arranged on or in a seal, the seal being associated with the opening, in particular in order to seal the opening when the adjusting part is in the closed position. This makes it possible to arrange the transmitting or receiving device for the user at least substantially hidden. Furthermore, the seal provides some protection, especially against moisture and mechanical stress.

According to one embodiment of the invention, the transmitting device and / or the receiving device is / are arranged on the body of the motor vehicle, in particular on or in a bumper. This in turn allows a hidden and protected arrangement of the transmitting and / or the receiving device.

According to one embodiment of the invention, the adjusting part is a window pane of an electrically driven window lifter, an electrically driven side door, in particular a sliding door, an electrically driven tailgate or an electrically driven sunroof.

The invention will now be described in more detail by means of exemplary embodiments with reference to the appended figures, wherein:

1 a schematic representation of a system according to the invention;

2 shows a greatly simplified representation of an adjustment system with two variants for arranging a transmitting device and a receiving device;

3 shows a greatly simplified representation of an adjustment system with a third variant for the arrangement of a transmitting device and a receiving device;

4 a representation of the adjustment after 2 with an obstacle in the adjustment path shows and

5 a schematic diagram for evaluating the signals of the receiving device and for detecting an obstacle in the adjustment shows.

This in 1 illustrated inventive system comprises an adjustment 1 , In the adjustment, it may be z. B. a window of a Vehicle door, a tailgate, a side door, in particular a sliding door, or a sunroof act. The adjustment part 1 is powered by an electric drive 2 , in particular a DC motor, via an associated adjusting mechanism 3 driven. In the adjustment mechanism 3 it may be in the case of a window z. B. act a gear and a cable window lifter. The electric drive 3 is signal technology with a control device 4 for controlling the drive 2 connected. The adjustment part 1 are also a transmitting device 5 for radiating terahertz waves and a receiving device 6 associated with receiving terahertz waves. The transmitting device 5 is signal technology with the control device 4 connected. Furthermore, the receiving device 6 for transmitting the received signal to the controller 4 connected by signal technology. Instead of a control device 4 can also be a first control device for controlling the drive 2 and a second control device for connection to the transmitting device 5 and the receiving device 6 be provided.

The 2 to 4 show a greatly simplified representation of a window pane 11 (shown in phantom) formed adjusting part. The window glass 11 is in the frame 7 a (not shown) vehicle door out. The frame 7 is usually associated with a seal assembly (not shown). The window glass 11 is along a displacement x by means of the electric drive 2 adjustable. The window glass 11 is between an opening position in which it is an opening 8th the vehicle door releases at least in sections, and a closed position in which they the opening 8th completely closes, adjustable.

According to a first in 1 illustrated variant is the transmitting device 5 (if the door is installed in a vehicle as intended) on the upper part of the frame 7 arranged. The transmitting device 5 radiates after activation by the control device 4 ( 1 ) Terahertz waves 9 from. The terahertz waves 9 At least in sections, they run along the adjustment path x. The terahertz waves 9 lay down in particular like a kind of curtain at least in sections over the opening 8th , The transmitting device 5 is a receiving device 6 assigned. In the first variant after 1 is the receiving device 6 on the adjusting part, ie on the window pane 11 arranged. The receiving device 6 here only includes a receiver 10 , to the reception of the radiated terahertz waves 9 one through the thighs 14 . 14 ' has indicated monitoring area.

According to a second in 1 dash-dotted variant shown is the receiving device 6 ' (if the door is installed in a vehicle as intended) at the lower part of the frame 7 , in particular on or in the door shaft arranged. The receiving device 6 ' includes a plurality of receivers 10 ' - Here, for example, three - whose monitoring areas preferably overlap. In an arrangement according to this second variant, the terahertz wave curtain is spaced from the windowpane 11 provided. This can be a recognition of the window 11 be avoided as an obstacle in the displacement x. For easy installation can / can the transmitter 5 and / or the receiving device 6 ' z. B. be arranged in a slotted line.

It should be noted that the positions of the transmitting device 5 and the receiving device 6 . 6 ' can be reversed. So z. B. the receiving device 6 . 6 ' at or in the upper section of the frame 7 , in particular on or in the seal, and the transmitting device 5 at the windowpane 11 or at the bottom of the frame 7 , in particular on or in the door shaft, be arranged.

3 shows a third variant to the arrangement of here with 5 ' designated transmitting device and the here with 6 '' designated receiving device. The transmitting device 5 ' is in the form of an advantageous in terms of the required space designed transmitter for emitting terahertz waves 9 educated. The terahertz waves 9 lie down again like a curtain over the opening 8th (indicated here only in the form of three arrows). The receiving device 6 '' is (at the intended installation of the door in a vehicle) on the side or in the frame 7 , preferably in the seal. If the monitoring area of the receiving device 6 '' is not enough to the opening 8th to completely monitor, it is preferably provided that the receiving device 6 '' the opening 8th or the adjustment path x of the window pane 11 , in particular by means of a mechanical pivoting movement or an electronic displacement of the monitoring area, preferably scans cyclically. This scanning is by the reference numeral 12 indicated arrow indicated. Alternatively or additionally, it is possible that the transmitting device 5 ' performs a corresponding pivoting movement or a displacement of the radiated terahertz wave curtain.

As in particular from the 2 and 3 it can be seen that the from the transmitting device 5 . 5 ' radiated terahertz waves 9 essentially unhindered by the receiving device 6 . 6 ' . 6 '' receive, if there is no obstacle in the adjustment x of the window 11 located.

In a fourth variant not shown in the form of figures, the transmitting device and the receiving device are located, preferably in a common housing, on the same side of the frame of the adjustment. The arrangement in a common housing allows a simple construction of the system and provides protection for the transmitting device and the receiving device. In addition, a reflection device is provided opposite, which reflects the terahertz waves emitted by the transmitting device. The reflected terahertz waves may then be at least partially received by the receiving device when there is no obstacle in the adjustment path.

As in 4 is shown schematically, the of the transmitting device 5 . 5 ' radiated terahertz waves 9 by an obstacle located in the adjustment path x 13 , in particular a human body part, at least partially attenuated. The from the receiving device 6 . 6 ' . 6 '' received signal intensity decreases in this case. By means of the control device 4 can by evaluation of the receiving device 6 . 6 ' . 6 '' received and transmitted signals to the presence of the obstacle 13 getting closed.

A diagram which schematically shows the evaluation by the receiving device 6 . 6 ' . 6 '' received and to the controller 4 transmitted signals is in 5 shown.

• – x₀ die Öffnungsposition des Verstellteils 1,
• – mit x₁ eine Position, an welcher die Sendeeinrichtung 5, 5' eingeschaltet wird,
• – mit x₂ eine Position, ab welcher das Einklemmschutzsystem aktiv ist,
• – mit x₃ eine Position, an welcher das Hindernis 13 im Verstellweg x erkannt wird,
• – mit x₄ eine Position, ab welcher das Einklemmschutzsystem nicht mehr aktiv ist bzw. an welcher die Sendeeinrichtung 5, 5' abgeschaltet wird, und
• – mit x₅ die Schließposition des Verstellteils 1 bezeichnet.

In the diagram, the signal intensity SI (ordinate) is a measure for detecting the obstacle 13 applied over the adjustment path x (abscissa). In the diagram is with

• - x _0, the opening position of the adjustment 1 .
• With x ₁ a position at which the transmitting device 5 . 5 ' is turned on,
• With x ₂ a position from which the anti-trap system is active,
• - with x ₃ a position at which the obstacle 13 is detected in the displacement x,
• - With x ₄ a position from which the anti-trap system is no longer active or at which the transmitting device 5 . 5 ' is turned off, and
• - With x _5, the closed position of the adjustment 1 designated.

The anti-trap system should in particular only for a certain portion of the adjustment x, z. B. the last third of the movement in the direction of the closed position x _{5 be} active. Furthermore, the anti-pinch system at the last stage of the closing process, for a window z. B. the last 4 mm from the closed position x ₅ , not be active. In the illustrated diagram, the anti-pinch system is therefore active only in the range between x ₂ and x ₄ .

When adjusting the adjustment 1 in the direction of the closed position x ₅ , the transmitting device 5 . 5 ' from the position x ₁ of the control device 4 to radiate terahertz waves 9 driven. The position x ₁ lies so far away from the position x ₂ that a system-related startup behavior is taken into account.

If there is no obstacle in the adjustment path x, that of the receiving device increases 6 . 6 ' . 6 '' received signal intensity SI quickly to a above a threshold value S and within a normal range lying normal value. If the signal intensity SI at x _{2 is} below the threshold S, it becomes an obstacle 13 closed in the adjustment x.

From position x ₂ the anti-trap system is active. With a solid line is a course of signal intensity SI in the event that no obstacle 13 in the adjustment x is shown. Between the positions x ₂ and x ₄ , the signal intensity SI is above the threshold value S. At the position x ₄ , the transmitting device 5 . 5 ' off. The signal intensity SI at the receiving device 6 . 6 . 6 '' then falls off quickly. At position x ₅ is the adjustment part 1 in the closed position.

The dashed line shows the course of signal intensity SI in the event that there is an obstacle 13 in the adjustment x is shown. Once the obstacle 13 is present in the adjustment x, takes from the receiving device 6 . 6 ' . 6 '' received signal intensity SI. At the position x ₃ , the signal intensity SI falls below the threshold value S. From the control device 4 will then be an obstacle 13 closed in the adjustment x and the adjustment of the adjustment 1 stopped and / or reversed.

When using the system for a tailgate or side door, in particular sliding door, or a sliding roof, it is particularly advantageous the transmitting device 5 . 5 ' or the receiving device 6 . 6 ' . 6 '' on the adjustment part 1 and the receiving device 6 . 6 ' . 6 '' or the transmitting device 5 . 5 ' to arrange on the vehicle body.

For adjusting parts 1 whose adjustment is carried out from the opening position x ₀ in the closed position x ₅ in the form of a pivoting movement, is an orientation of the transmitting device 5 . 5 ' and the receiving device 6 . 6 ' . 6 '' to ensure each other over the adjustment x, in particular in the section between the positions x ₂ and x ₄ . This can be z. B. by varying the direction of the radiated terahertz curtain or the monitoring area and / or by mechanical adjustment, in particular pivoting, the transmitting device 5 . 5 ' and / or the receiving device 6 . 6 ' . 6 '' respectively.

LIST OF REFERENCE NUMBERS

1

adjusting part

2

drive

3

adjustment mechanism

4

control device

5, 5 ''

transmitting device

6, 6 ', 6' '

receiver

7

frame

8th

opening

9

terahertz waves

10, 10 '

receiver

11

windowpane

12

Arrow (pivoting movement)

13

obstacle

14, 14 '

leg

S

threshold

SI

signal intensity

x

adjustment

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 4030607 A1 [0003]

Cited non-patent literature

• University of Bonn "Terahertzwellen: Gold Mine for Science and Technology" (Buse, Breunig); available at: http://www.photonik.uni-bonn.de/bilingual/Vorlesungen/photonik_ws0809/Terahertz.pdf [0006]

Claims (10)

An anti-jamming system for an adjustment part adjustable between an opening position (x ₀ ) and a closing position (x ₅ ) along an adjustment path (x) ( 1 ) for closing an opening ( 8th ) of a motor vehicle with - an electric drive ( 2 ), which is designed and set up, the adjustment part ( 1 ) via an associated adjustment mechanism ( 3 ) between the opening position (x ₀ ) and the closing position (x ₅ ) along the displacement path (x), - at least one transmitting device ( 5 . 5 ' ) for emitting terahertz waves ( 9 ) at least over sections of the adjustment path (x), - at least one of the transmission device ( 5 . 5 ' ) associated receiving device ( 6 . 6 ' . 6 '' ) for receiving terahertz waves ( 9 ) in the adjustment path (x), - one with the receiving device ( 6 . 6 ' . 6 '' ) ( 4 ) designed and arranged to be received by the receiving device ( 6 . 6 ' . 6 '' ) received terahertz waves ( 9 ) to evaluate whether an obstacle ( 13 ) in the adjustment path (x) or not, and a movement of the adjustment ( 11 ), in particular in the direction of the closed position (x ₀ ), to stop and / or to reverse, if by the control device ( 4 ) is recognized as an obstacle ( 13 ) is in the adjustment path (x). A system according to claim 1, wherein the control device ( 4 ) is designed and set up to receive a signal intensity (IS) of the received terahertz waves ( 9 ) as a measure of whether an obstacle ( 13 ) in the adjustment path (x) of the adjustment ( 1 ) and where an obstacle ( 13 ) is detected when the measure reaches and / or falls below a predetermined threshold value (S). System according to claim 1 or 2, wherein the transmitting device ( 5 ' . 5 '' ) and the receiving device ( 6 . 6 ' . 6 '' ) are arranged substantially opposite one another such that the receiving device ( 6 . 6 ' . 6 '' ) from the transmitting device ( 5 . 5 ' ) radiated terahertz waves ( 9 ) at least partially receives, if no obstacle ( 13 ) is in the adjustment path (x). System according to one of the preceding claims, wherein the transmitting device ( 5 . 5 ' ) and / or the receiving device ( 6 . 6 ' . 6 '' ) is arranged in a slotted line / are. System according to one of the preceding claims, wherein the receiving device ( 6 . 6 ' . 6 '' ) an opening ( 8th ) is assigned at least partially covering monitoring area, and wherein the receiving device ( 6 . 6 ' . 6 '' ) is adapted and set up the monitoring area for receiving terahertz waves ( 9 ), in particular cyclically. System according to claim 6, wherein the control device ( 4 ) is designed and set up, the receiving device ( 6 . 6 ' . 6 '' ) so that the receiving device ( 6 . 6 ' . 6 '' ) only scans the monitoring area when the adjusting element ( 1 ) is moved in the direction of the closed position (x ₅ ). System according to one of the preceding claims, wherein the transmitting device ( 5 . 5 ' ) and / or the receiving device ( 6 . 6 ' . 6 '' ) on the adjusting part ( 11 ) is / are arranged. System according to one of the preceding claims, wherein the transmitting device ( 5 . 5 ' ) and / or the receiving device ( 6 . 6 ' . 6 '' ) is arranged on or in a seal, wherein the seal of the opening ( 8th ), in particular around the opening ( 8th ) when the adjustment part ( 1 ) is in the closed position (x ₅ ). System according to one of the preceding claims, wherein the transmitting device ( 5 . 5 ' ) and / or the receiving device ( 6 . 6 ' . 6 '' ) is arranged on the body of the motor vehicle, in particular on or in a bumper, is / are. System according to one of claims 1 to 9, wherein the adjusting part ( 1 ) a window pane ( 11 ) of an electrically driven window lifter, an electrically driven side door, in particular a sliding door, an electrically driven tailgate or an electrically driven sunroof is.

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