초록 ▼

A method for detecting obstacles, such as people for example, in the operation of remote-controlled vehicles (10). The vehicle may be an industrial materials-handling truck or an industrial robot equipped with a data processing control system and transmitters (20,22) and receivers (24) for ultra-sou

A method for detecting obstacles, such as people for example, in the operation of remote-controlled vehicles (10). The vehicle may be an industrial materials-handling truck or an industrial robot equipped with a data processing control system and transmitters (20,22) and receivers (24) for ultra-sound waves. Ultra-sound pulses are transmitted continuously in groups from the transmitter in a pre-determined pattern, and only one input signal having a pulse pattern corresponding to the aforementioned predetermined pattern for respective pulse groups is received by the receiver (24) and evaluated by the data processor for controlling maneuvering of the vehicle (10).

대표청구항 ▼

A method of detecting obstacles in the path of an operating remote-controlled machine having a data processing control system, transmitters, and receivers for ultra-sound waves, comprising the steps of: transmitting ultra-sound pulses in groups continously from said transmitters in a predetermined p

A method of detecting obstacles in the path of an operating remote-controlled machine having a data processing control system, transmitters, and receivers for ultra-sound waves, comprising the steps of: transmitting ultra-sound pulses in groups continously from said transmitters in a predetermined pattern thereby forming pulse group output signals; receiving only an input signal having a pulse pattern corresponding to the predetermined pattern of said pulse group output signals by the receiver; and evaluating the received input signal by using the data processing control system for controlling the maneuvering of the vehicle, including mixing the received input signal with a reference signal of the same frequency as the output signals in each of two channels and displacing the phase of the reference signal in one channel by about 90°relative to the reference signal in the other channel.