发明名称 |
Inclinometer |
摘要 |
An inclinometer 20 has a sensing unit 40 for providing a varying capacitance signal depending on the orientation of the inclinometer 20. An oscillator circuit unit 82 includes the sensor unit 40 as a capacitive element for providing a signal having a period and a frequency depending on the capacitance of the sensor unit 40. A unit 92 is provided for determining the period of the signal. A look-up table unit 96 stores a predetermined relationship between the period of the signal and the angle of orientation of the inclinometer 20. A comparison unit 94 then compares the period of the signal to the period stored in the look-up table unit 96 and selects the corresponding angle which is the angle of orientation of the inclinometer 20. The angle is then displayed on the inclinometer display 25.
|
申请公布号 |
US4912662(A) |
申请公布日期 |
1990.03.27 |
申请号 |
US19870065286 |
申请日期 |
1987.06.22 |
申请人 |
WEDGE INNOVATIONS, INC. |
发明人 |
BUTLER, ANDREW G.;GREEN, DONALD G.;NAGLE, ROBERT E. |
分类号 |
G01C9/06;G01C9/18;G01C9/20 |
主分类号 |
G01C9/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|