Object detecting apparatus having case breakage detecting function

DETAILED DESCRIPTION It is therefore an object of the present invention to provide an object detecting apparatus, which is capable of detecting incomplete air or fluid-tightness due to breakage of a case.
According to the present invention, an object detecting apparatus for a vehicle has a wave radiation unit and a wave receiver unit disposed in a case having a wave radiating window and a wave receiving window for detecting an object or a distance to the object.
The apparatus further has a case inside condition sensor for detecting a case inside condition, which changes when the case is broken.
The case inside condition sensor may detect temperatures, humidity or pressures in the case.
A breakage of the case is detected from a change in the detected case inside conditions.
A case outside condition may be additionally used to detect the breakage of the case.