DE102005012909A1 - Surveying device for determining damage to motor vehicle has receiver circuit that receives radio signal from electronics, with radio signal transmittable via radio interface to central office - Google Patents

Abstract

The The invention relates to a device (1) for detecting damage to a person Motor vehicle, comprising at least one film (2), in the at least a transducer element (3) for the conversion of mechanical into electrical Energy and at least one electronics (4) for generation and dispatch a radio signal are arranged, wherein by means of the transducer element (3) the electronics (4) can be supplied with electrical energy, and a receiver circuit for receiving the radio signals of the electronics (4), wherein the received Radio signals in a memory (8) can be stored and / or by means of a radio interface are transferable to an external center.

Description

The The invention relates to a device for detecting damage to a Motor vehicle.

From the DE 41 18 500 A1 a detector is known for detecting accidents, with a housing in which chambers in chambers or from chamber to chamber masses defined by inertia forces and traceable, if the corresponding directed inertia forces are greater than acting by spring forces counter forces. From the position of the mass pieces, the number, the direction and the sequence of several immediate events can be seen after an accident. As a result, a time verification of an accident is possible.

From the DE 199 20 402 A1 an accident detector is known, consisting of a working in the direction of travel and a direction transverse to the direction of acceleration sensor and each of a working around the respective axes position sensor. The output signals are supplied to comparators, which compare the current acceleration and position values of the motor vehicle with predetermined threshold values. If the acceleration or position values are exceeded above the threshold values, the ability to act of the persons involved in the accident is checked after an established system standstill with the aid of an acoustically operating interrogation pulse. If no action can be determined, an alarm is triggered.

The Accident detectors are only suitable for detecting major accidents, but not for the slightest damage such as a dented bumper due to incorrect parking.

From the DE 102 56 156 A1 is an energy-autonomous electromechanical radio switch (radio button) is known, with at least one transducer element for converting mechanical into electrical energy, at least one actuation field for introducing mechanical energy, at least one sensor per actuation field for detecting the operation, at least one electronics for generating and sending a Funksig nals and at least one mechanism for deflecting the forces introduced by the actuation field onto the transducer element.

Of the Invention is the technical problem underlying a device for recording damages to create a motor vehicle, by means of which also lighter damage reliable be detected.

The solution the technical problem arises from the subject with the Features of claim 1. Further advantageous embodiments of Invention will become apparent from the dependent claims.

For this the device comprises at least one foil in which at least a transducer element for the conversion of mechanical into electrical Energy and at least one electronics for generation and dispatch a radio signal are arranged, wherein by means of the transducer element the electronics are supplied with electrical energy. Next includes the Device a receiver circuit for receiving the radio signals of the electronics, wherein the received Radio signals stored in a memory and / or to an external Central transmitted by means of a radio interface. The advantage The film is that this is energy self-sufficient and therefore no wiring needed which also a subsequent attachment greatly simplified on the motor vehicle. The transducer elements are It is designed so sensitive to mechanical pressures or forces that even minor damage such Paint scratches or bumps on the bumper are detectable. This allows the device the lead a "damage logbook", which in particular in the area of car-sharing or rental motor vehicles of interest is to cause a certain, not easily recognizable damage to motor vehicles a motor vehicle driver assigned.

In a preferred embodiment the transducer element is a piezoelectric and / or a magnetodynamic and / or a magnetostructural transducer element. It can in the film several transducer elements are arrayed or arranged but the transducer element are formed such that a spatial resolution of the mechanical Power possible is. Such training are always advantageous when the Damage possible precisely determined locally shall be.

In a further preferred embodiment are several transducer elements associated with electronics. Further Preferably, the electronics comprise means for detecting the or the transducer elements from which the electronics currently their electrical energy refers. This can be a significant reduction of the necessary Electronics can be achieved. The radio signals of the electronics are then encoded and comprise information, which transducer element the electrical energy has delivered what the place of damage equivalent.

In a further preferred embodiment, the receiver circuit is integrated in a control unit of the motor vehicle. As a result, it is basically possible to fall back on the existing hardware structure in the motor vehicle. So For example, the control unit with the integrated receiver circuit via a vehicle-side bus system forward the information to a GSM module or similar systems, from where the information is transmitted to the control center.

In a further preferred embodiment the radio signal is assigned a time stamp at the time to document the damage.

In a further preferred embodiment is a foil colored. As a result, the film can be retrofitted glued to the motor vehicle and optically good adjust the existing paint.

The Invention will be described below with reference to a preferred embodiment explained in more detail. The single figure shows a schematic block diagram of a device for recording damages on a motor vehicle.

The device 1 to detect damage to a motor vehicle includes several slides 2 which are glued or otherwise fastened to the motor vehicle. Every slide 2 includes several transducer elements 3 , which are preferably formed as piezoelectric transducer elements. Furthermore, the film includes 2 at least one electronics 4 that with an antenna 5 is trained. The transducer elements 3 are with power supply terminals of the electronics 4 connected. Furthermore, the device comprises 1 a receiver circuit operating in a control unit 6 of the motor vehicle is integrated. The control unit 6 is also with an antenna 7 , a store 8th and a bus system 9 connected the motor vehicle.

If mechanical damage of the motor vehicle, for example a paint scratch, occurs, this scratch generates a mechanical pressure on the locally assigned transducer element 3 , The associated transducer element 3 or the associated transducer elements at larger pressure surfaces generate an electrical voltage, which serves as the supply voltage of the electronics 4 serves. Due to the generated electrical voltage is the electronics 4 activated and detected by which transducer element 3 the electrical supply comes. This information is in electronics 4 coded and transmitted as a radio signal to the receiver circuit. There, a time stamp can then be assigned to the radio signal, so that in the receiver circuit after the decoding time and location of the damage are known. This information can then be stored in memory 8th stored and / or via the bus system 9 be transferred to another controller, such as a GSM module. Next it is possible the electronics 4 such that the height of the voltage of the transducer element 3 is detected, thereby also providing a measure of the degree of mechanical damage. Further, it is possible that within the slide several electronics 4 be arranged, with the individual electronics 4 one or more transducer elements each 3 assigned. The coding of the radio signals can be realized in various ways. For example, a PWM method may find application.

Claims (7)

Contraption ( 1 ) for detecting damage to a motor vehicle, comprising at least one film ( 2 ), in which at least one transducer element ( 3 ) for the conversion of mechanical into electrical energy and at least one electronics ( 4 ) are arranged for generating and sending a radio signal, wherein by means of the transducer element ( 3 ) the Electronic ( 4 ) is supplied with electrical energy, and a receiver circuit for receiving the radio signals of the electronics ( 4 ), wherein the received radio signals in a memory ( 8th ) and / or transferable by means of a radio interface to an external center. Device according to claim 1, characterized in that the transducer element ( 3 ) is a piezoelectric and / or a magnetodynamic and / or a magnetostructural transducer element. Device according to one of the preceding claims, characterized in that a plurality of transducer elements ( 3 ) an electronics ( 4 ) assigned. Device according to claim 3, characterized in that the electronics ( 4 ) Means for detecting the transducer element ( 3 ), from which the electronics ( 4 ) is currently receiving its electrical energy, wherein the radio signals are coded and comprise information which transducer element ( 3 ) has supplied the electrical energy. Device according to one of the preceding claims, characterized in that the receiver circuit in a control unit ( 6 ) of the motor vehicle is integrated. Device according to one of the preceding claims, characterized characterized in that the radio signal in the receiver circuit, a time stamp is assigned. Device according to one of the preceding claims, characterized in that the film ( 2 ) is colored.