| 摘要 |
A distance measuring sensor and a distance measuring method using the same are provided to obtain exact distance information even at a long distance by operating the CW(Continuous Wave) type distance measuring sensor in a pulse mode. A distance measuring sensor is composed of a frequency fixed oscillator(405) generating a reference signal and a transmission signal transmitted to an object; an antenna(404) transmitting and receiving the transmission signal and a received signal reflected from the object; a power amplifier(402) amplifying the transmission signal; a low-noise amplifier(409) amplifying the received signal; a first switch(401) controlling the power amplifier; a 6-port circuit(408) receiving the reference signal and the received signal as own input signals and generating distance information represented as power of a high frequency signal, according to phase difference of two signals; a second switch(406) installed between the frequency fixed oscillator and the 6-port circuit to control the reference signal; a high frequency power detector(410) converting power of the high frequency signal output from the 6-port circuit, into DC(Direct Current) voltage; an ADC(Analog-To-Digital Converter)(412) converting DC voltage output from the high frequency power detector, into processable data; and a central operation processing unit(407) controlling the frequency of a signal generated from the frequency fixed oscillator and the operations of the first and second switches, calculating the information output from the ADC into distance data through an algorism input in advance, and then displaying the calculation result.
|
