| 摘要 |
The invention relates to a method for determining the vertical distance between an object and a device with a changing position, especially a motor vehicle, whereby a first sensor placed in this device gives off a signal, said signal is reflected by the object, and the reflected signal is received by the first sensor. The distance between the first sensor and the object is calculated from the transit time of the signal from being sent to being received by the first sensor. This distance is used to calculate all possible positions of the object in relation to the sensor, in order to determine the vertical distance of the object. The signal reflected by the object is also received by a second sensor, this second sensor also being positioned in the device with a variable position. A path from the first sensor to the object and from the object to the second sensor is then calculated from the transit time of the signal from the first sensor to the second sensor. This path is used to determine all possible positions of the object in relation to the second sensor. Finally, the positions calculated for the first and second sensors with the same distance are compared and the vertical distance to the device with a variable position is determined for the positions of the object detected by both the first and second sensors.
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