RADAR LIQUID LEVEL MEASURING APPARATUS AND RADAR LIQUID LEVEL MEASURING METHOD

摘要

A radar liquid level measuring apparatus (10) includes a first oscillation module (102), a second oscillation module (104), a frequency comparator (106) and a control module (107). The first oscillation module (102) has a first oscillation frequency. The first oscillation module (102) generates a first pulse signal (10202). The second oscillation module (104) has a second oscillation frequency. The second oscillation module (104) generates a second pulse signal (10402). The frequency comparator (106) converts the first pulse signal (10202) and the second pulse signal (10402) into an adjusted signal (10602). The control module (107) compares the adjusted signal (10602) with an expectation value (10818) to obtain a comparative result signal. According to the comparative result signal, the control module (107) adjusts the second oscillation frequency, so that the second oscillation frequency and the first oscillation frequency have a constant frequency difference.

主权项

1. A radar liquid level measuring apparatus (10) comprising:
a first oscillation module (102) having a first oscillation frequency and generating a first pulse signal (10202) according to the first oscillation frequency; a second oscillation module (104) having a second oscillation frequency and generating a second pulse signal (10402) according to the second oscillation frequency; a frequency comparator (106) electrically connected to the first oscillation module (102) and the second oscillation module (104); and a control module (107) having an expectation value and electrically connected to the second oscillation module (104) and the frequency comparator (106), wherein the first oscillation module (102) sends the first pulse signal (10202) to the frequency comparator (106); the second oscillation module (104) sends the second pulse signal (10402) to the frequency comparator (106); the frequency comparator (106) converts the first pulse signal (10202) and the second pulse signal (10402) into an adjusted signal (10602); the frequency comparator (106) sends the adjusted signal (10602) to the control module (107); the control module (107) compares the adjusted signal (10602) with the expectation value (10818) to obtain a comparative result signal; according to the comparative result signal, the control module (107) adjusts the second oscillation frequency, so that the second oscillation frequency and the first oscillation frequency have a constant frequency difference.