Abstract
A circuit arrangement for capturing a position change of a component, comprising a printed circuit board. The component comprises a component portion with which the component is arranged on the printed circuit board and is aligned therewith. At least one movement direction is provided, in which the component moves in the event of a position change. At least one resistor is arranged in the movement direction with a tolerance distance from the component portion such that, in the event of a position change of the component, the tolerance distance is exceeded so that the component portion shears the resistor.
Claims
1. A circuit arrangement for capturing a position change of a component comprising: a printed circuit board; a component arranged on and aligned with the printed circuit board with a component portion, wherein in the event of a position change, the component moves in at least one movement direction; and at least one resistor arranged one the printed circuit board in the movement direction with a tolerance distance from the component portion such that, in the event of a position change of the component, the tolerance distance is exceeded so that the component portion shears the resistor.
2. The circuit arrangement according to claim 1, wherein the at least one movement direction is multiple movement directions.
3. The circuit arrangement according to claim 2, wherein the multiple movement directions are one of two, four or eight movement directions.
4. The circuit arrangement according to claim 2, wherein the at least one resistor is multiple resistors, each arranged around the component portion in one of the multiple movement directions.
5. The circuit arrangement according to claim 4, wherein there are multiple resistors in each of the multiple movement directions.
6. The circuit arrangement according to claim 4, wherein the multiple resistors are connected in series.
7. The circuit arrangement according to claim 1, wherein the resistance value of the at least one resistor is less than 1 ohm.
8. The circuit arrangement according to claim 7, wherein the resistance value of the at least one resistor is 0 ohm.
9. The circuit arrangement according to claim 1, wherein the component is an antenna.
10. The circuit arrangement according to claim 1, wherein the antenna is an at least partially metallized plastic antenna.
11. The circuit arrangement according to claim 1, wherein the printed circuit board defines at least one passage via which the component portion is arranged on and aligned with the printed circuit board.
12. The circuit arrangement according to claim 1, wherein the function of the voltage supply or of the power supply unit is switched off or adversely affected in the event of a position change of the component, if the resistor or at least one of the resistors is sheared.
13. A radar sensor for capturing the surroundings for a vehicle, having a circuit arrangement for capturing a position change of the vehicle comprising: a printed circuit board; a component arranged on and aligned with the printed circuit board with a component portion, wherein in the event of a position change, the component moves in at least one movement direction; and at least one resistor arranged one the printed circuit board in the movement direction with a tolerance distance from the component portion such that, in the event of a position change of the component, the tolerance distance is exceeded so that the component portion shears the resistor.
14. A vehicle comprising: a radar sensor for capturing the surroundings for a vehicle having a circuit arrangement comprising: a printed circuit board; a component arranged on and aligned with the printed circuit board with a component portion, wherein in the event of a position change, the component moves in at least one movement direction; and at least one resistor arranged one the printed circuit board in the movement direction with a tolerance distance from the component portion such that, in the event of a position change of the component, the tolerance distance is exceeded so that the component portion shears the resistor.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The invention is explained in greater detail below with reference to expedient exemplary embodiments, wherein:
[0018] FIG. 1 shows a simplified 3D representation of a configuration of a circuit arrangement;
[0019] FIG. 2 shows a simplified top view representation of a configuration of the printed circuit board of the circuit arrangement from FIG. 1;
[0020] FIG. 3 shows a simplified top view representation of a configuration of the printed circuit board with antenna base of the circuit arrangement from FIG. 1;
[0021] FIG. 4 shows a simplified top view representation of a configuration of the printed circuit board with antenna base of the circuit arrangement from FIG. 3 and marked movement directions;
[0022] FIG. 5 shows a simplified top view representation of a configuration of the printed circuit board with antenna base of the circuit arrangement from FIG. 3 and marked movement directions;
[0023] FIG. 6 shows a simplified representation of a configuration of a part of the circuit arrangement, and
[0024] FIG. 7 shows a simplified schematic representation of a configuration of a vehicle.
DETAILED DESCRIPTION
[0025] The circuit arrangement provides that resistors having a low resistance value, in particular 0-ohm resistors, on the printed circuit board or circuit board can be positioned around the contact region between the printed circuit board and the component. A circuit arrangement according to the invention is shown in FIGS. 1-3, which is part of a radar sensor. In this case, an antenna 1, which is arranged with a component portion or the antenna base 2 in an antenna contact region on the printed circuit board 3, is provided as a component. Furthermore, the antenna 1 can have additional fastening devices 4, with which the antenna 1 can be additionally fastened to the printed circuit board 3, e.g., in bores 5. The antenna 1 is an at least partially metallized plastic antenna, wherein the radar chip 6 can be arranged or soldered on one side of the printed circuit board, which in turn radiates through at least one opening or one passage 7 of the printed circuit board 3 into the component portion or antenna base 2 of the antenna, with which the antenna 1 is arranged on the other side of the printed circuit board 3.
[0026] A top view of the printed circuit board 3 is shown in FIG. 4, in which movement directions are now fixed with reference to black arrows, in which the antenna 1 or the antenna base 2 can move or be shifted. Of course, the antenna 1 can also shift in a direction which lies between these movement directions which would, however, also be captured up to a certain extent since a movement in an offset direction would also cause a movement in one of the fixed movement directions due to the dimensions of the antenna base. As a function of the geometry of the component or of the antenna 1 or of the antenna base 2, it is consequently fixed how many movement directions are required. In this case, multiple movement directions can be provided, for example two opposing movement directions, four movement directions arranged in a cross-shaped manner or eight movement directions or another resulting arrangement of movement directions around the component. As a result, all shearing or movement directions can be covered as a function of the geometry of the component, so that the recognition of a position change can be reliably carried out.
[0027] To this end, an arrangement of resistors 8, as shown in FIG. 5, which are arranged at a distance or tolerance distance, which includes a certain movement tolerance allowed for the function, from the component or from the antenna 1 or antenna base 2 in the direction of movement. Furthermore, multiple resistors 8 can be provided, wherein at least one resistor is arranged around the component portion or antenna base 3 in each case in a movement direction. These resistors 8 may be part of the power supply or of the power supply unit of the radar sensor so that the activate device or the Enable pin of the power supply unit can be controlled as long as the resistors 8 are present or operational. As soon as the component or the antenna moves more than is permissible, i.e., exceeds the tolerance distance, at least one of the resistors 8 is sheared, which then leads to an interruption in the power supply or in the power supply unit 11. In this case, a so-called pull-down resistor 9 at the Enable pin 10a of the IC module 10a of the power supply unit 11 leads to the power supply unit 11 of the radar sensor remaining permanently switched off.
[0028] Reference numeral 12 in FIG. 7 denotes a vehicle which has a control apparatus 13, various actuators as well as sensors for capturing the surroundings. The vehicle 12 can be controlled in a partially automated manner in that the control apparatus 13 can access the actuators and the sensors or the sensor data thereof. In the field of assisted or automated driving, the sensor data can be utilized for recognizing the environment and objects so that various assistants or assistance functions such as, e.g., Adaptive Cruise Control, Electronic Brake Assist, a Lane Departure Warning System or a Lane Keep Assist (LKA), parking assistant, traffic jam assistant or the like, can be realized via the control apparatus 13 or the algorithm stored therein. Furthermore, the radar sensors 17 or 20a-20d can, for example, be radar sensors which have a circuit arrangement according to the invention. In the same way, the remaining sensors or the control apparatus 13 can admittedly also have a circuit arrangement, in which a component is arranged with a component portion on a printed circuit board and is aligned therewith, and at least one movement direction is provided, in which the component can move in the event of a position change, and at least one or multiple, resistor or resistors is/are arranged in the movement direction with a tolerance distance from the component portion such that, in the event of a position change of the component, the tolerance distance is exceeded so that the component portion initially contacts the resistor and then, in the course of the further movement of the component portion, shears or destroys the resistor since the resistor can no longer retain the component or the antenna or the component portion against shifting.
