| 摘要 |
PURPOSE:To perform a gravity measurement of good accuracy by transducing a temp. into frequency and by offsetting the fluctuation in frequency due to the temp. of oscillating circuit including a chord with the change due to the temp. of this transduced signal. CONSTITUTION:An oscillating circuit 2 including a chord 1 for gravity measurement outputs a frequency signal corresponding to gravity and inputs to an AND gate 4 via frequency divider 3. A temp. sensor 5 detects the temp. around the chord 1 and this detection output is inputted into AND gate 8 via a temp.-frequency transducing circuit 6 and frequency divider 7. A clock signal outputted from AND gate 4, 8 is then added to ime series with OR gate 10 and inputted to a counter 11. The frequency dividing ratio of frequency divider 7 is properly selected so that the influence due to temp. change can be offsetted at the counter 11 and the clock signal corresponding to gravity is counted by the counter 11 and the counted volues are converted into analog with D/A convertor 412. |
