Ultra-sensitive system for measuring distance or position

An ultra-sensitive system for measuring position, comprising:

• plural UWB transmitter-receivers (1) periodically transmitting PN codes of M system and preliminarily disposed on known positions;
• a server (3) to synchronize the plural UWB transmitter-receivers (1);
• and
• an RF tag (T) attached to a moving object (20) as to receive signals (I0) synchronously and periodically transmitted from the UWB transmitter-receivers (1) and reflect the signals (I0) adding inherent tag recognition signal,
• wherein the UWB transmitter-receiver (1) is composed as to obtain the distances between the moving object (20) attached with the RF tag (T) and each of the plural UWB transmitter-receivers (1) by synchronous summation and correlative calculation of the PN codes of M system reflected by the RF tag (T), and
• wherein the position of the moving object (20) is calculated in the server (3) or the UWB transmitter-receiver (1) based on the distances.

An ultra-sensitive system for measuring distance, comprising:

• plural UWB transmitters (30) periodically transmitting PN codes of M system and preliminarily disposed on known positions;
• a server (3) to synchronize the plural UWB transmitters (30);
• and
• a freely movable UWB receiver (40) composed as to receive signals (I0) synchronously and periodically transmitted from the UWB transmitters (30) and obtain the distances to the UWB transmitters (30) by synchronous summation and correlative calculation of the received PN codes of M system.

An ultra-sensitive system for measuring position, comprising:

• plural UWB transmitters (30) periodically transmitting PN codes of M system and preliminarily disposed on known positions;
• a server (3) to synchronize the plural UWB transmitters (30);
• and
• a freely movable UWB receiver (40) composed as to receive signals (I0) synchronously and periodically transmitted from the UWB transmitters (30), obtain the distances to the plural UWB transmitters (30) by synchronous summation and correlative calculation of the received PN codes of M system, and calculate the self position based on the obtained distances.