公开(公告)号：EP1396703A2

公开(公告)日：2004-03-10

申请号：EP03077392.3

申请日：2003-07-30

Applicant: Delphi Technologies, Inc.

Inventor： Lin, Yingjie ,  Nicholson, Warren B.

IPC: G01D5/24

CPC classification number: G01D5/2405

Abstract: A sensor ( 46 ) for sensing the angular position of a rotatable body ( 10 ) including a stationary transmitter plate ( 12 ) with at least one transmitter electrode ( E, F ), a stationary receiver plate ( 14 ) with at least a first and a second receiver electrode ( A, B, C, D ), and a rotor ( 16 ) formed of a dielectric material and positioned between the facing electrodes ( A , B, C, D, E, F ) of the plates ( 12, 14 ). The rotor ( 16 ) is smaller than the plates ( 12, 14 ) and rotates with the rotatable body ( 10 ) to change the capacitance between the transmitter electrode(s) ( E, F ) and opposed receiver electrodes ( A, B, C, D ). The induced voltages on the receiver electrodes ( A, B, C, D ) indicate the angular position of the rotatable body ( 10 ). Preferably, the sensor ( 46 ) uses a square waveform signal and two transmitter electrodes ( E, F ) receive signals 180 degrees out of phase. Then, four receiver electrodes ( A, B, C, D ) forming two receiver pairs ( AC, BD ) are connected so that the current flowing between each pair is measured and converted to a voltage. A lookup table compares the values of the voltage pairs to known values ( 46, 48 ) from calibration, giving the angular position.

Abstract translation: 一种传感器（46），用于感测包括具有至少一个发射器电极（E，F）的固定发射器板（12）的可旋转主体（10）的角位置，固定接收板（14）至少具有第一和 第二接收器电极（A，B，C，D）和由介电材料形成并位于板（12，...，D）的相对电极（A，B，C，D，E， 14）。 转子（16）小于板（12,14），并与可旋转体（10）一起旋转以改变发射器电极（E，F）和相对的接收器电极（A，B，C）之间的电容 ，D）。 接收器电极（A，B，C，D）上的感应电压表示可转动体（10）的角度位置。 优选地，传感器（46）使用方波信号，并且两个发射器电极（E，F）接收180度异相的信号。 然后，形成形成两个接收器对（AC，BD）的四个接收器电极（A，B，C，D）被连接，使得在每对之间流动的电流被测量并转换成电压。 查找表将电压对的值与校准中的已知值（46,48）进行比较，给出角位置。

公开(公告)号：EP1396703A3

公开(公告)日：2006-06-14

申请号：EP03077392.3

申请日：2003-07-30

Applicant: Delphi Technologies, Inc.

Inventor： Lin, Yingjie ,  Nicholson, Warren B.

IPC: G01D5/24

CPC classification number: G01D5/2405

Abstract: A sensor ( 46 ) for sensing the angular position of a rotatable body ( 10 ) including a stationary transmitter plate ( 12 ) with at least one transmitter electrode ( E, F ), a stationary receiver plate ( 14 ) with at least a first and a second receiver electrode ( A, B, C, D ), and a rotor ( 16 ) formed of a dielectric material and positioned between the facing electrodes ( A , B, C, D, E, F ) of the plates ( 12, 14 ). The rotor ( 16 ) is smaller than the plates ( 12, 14 ) and rotates with the rotatable body ( 10 ) to change the capacitance between the transmitter electrode(s) ( E, F ) and opposed receiver electrodes ( A, B, C, D ). The induced voltages on the receiver electrodes ( A, B, C, D ) indicate the angular position of the rotatable body ( 10 ). Preferably, the sensor ( 46 ) uses a square waveform signal and two transmitter electrodes ( E, F ) receive signals 180 degrees out of phase. Then, four receiver electrodes ( A, B, C, D ) forming two receiver pairs ( AC, BD ) are connected so that the current flowing between each pair is measured and converted to a voltage. A lookup table compares the values of the voltage pairs to known values ( 46, 48 ) from calibration, giving the angular position.