Abstract: An ultrasonic doppler motion sensor device includes a transmitter (10, 12) for emitting a continuous ultrasonic transmission signal in a detection space, an ultrasonic receiver (20, 22) for detecting the ultrasonic transmission signal reflected by the detection object as a receive signal, and a mixer and detector (14, 18) for mixing the ultrasonic transmission signal or a signal derived therefrom with the receive signal and/or for demodulating the receive signal and for generating a motion detection signal therefrom, wherein the mixer and detector are assigned a system (14) for the adjustable generation of a phase shift greater than 0° between a phase of the ultrasonic transmission signal and a periodic impulse signal at the mixer or detector for scanning and mixing the receive signal.

Abstract: An ultrasonic doppler motion sensor device comprising transmitter means (10, 12) for emitting a continuous ultrasonic transmission signal in a detection space, ultrasonic receiver means (20, 22) for detecting the ultrasonic transmission signal reflected by the detection object as a receive signal, and mixer and detector means (14, 18) for mixing the ultrasonic transmission signal or a signal derived therefrom with the receive signal and/or for demodulating the receive signal and for generating a motion detection signal therefrom, wherein the mixer and detector means are assigned means (14) for the adjustable generation of a phase shift greater than 0° between a phase of the ultrasonic transmission signal and a periodic impulse signal at the mixer or detector means for scanning and mixing the receive signal.

Abstract: The invention relates to a vehicle for transporting products, comprising: a truck; a cargo space arranged on the truck for receiving the products during transport, with at least one access door; and an air curtain device close to the access door which, at least in the opened situation of the access door, generates an air curtain along a door opening of the access door, wherein the air curtain device comprises at least one fan, with an air feed duct which connects the fan to the exterior of the cargo space to supply outside air for the air curtain.