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Method and an apparatus for distance measurement

  • US 20050248749A1
  • Filed: 05/09/2005
  • Published: 11/10/2005
  • Est. Priority Date: 05/10/2004
  • Status: Abandoned Application
First Claim
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1. A method for distance measurement by determining the pulse transit time, in which pulsed electromagnetic radiation (13) is transmitted using at least one transmitter (11) and signal pulses (17) reflected at objects (15) are detected using at least one receiver (19), wherein at least one received logic signal (27) containing logic signals (25) is generated from the received analog signal (21) containing the signal pulses (17), in particular by means of a threshold circuit (23), and is evaluated with respect to the transit times of the logic signals (25), characterized in that the received logic signal (27) is read into a programmable logic circuit (31) by means of a clocked data reading device and is mapped onto a time pattern in the logic circuit (31), in that instantaneous values of the received logic signal (27) are, stored in logic units of the logic circuit (31) associated with the time windows for windows of the time pattern corresponding to at least one clock pulse of the data reading device.

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