초록 ▼

An angular position sensor (100) for determining angular position includes a shaft (105) having a threaded portion (108), and a structure for engaging an external application (119). The shaft (105) includes a first permanent magnet (114). A nut (116) is threaded on the threaded portion (108). The nu

An angular position sensor (100) for determining angular position includes a shaft (105) having a threaded portion (108), and a structure for engaging an external application (119). The shaft (105) includes a first permanent magnet (114). A nut (116) is threaded on the threaded portion (108). The nut (116) is formed from a first magnetic permeable material or includes a second permanent magnet (118). At least one constraint (122) is coupled to the nut (116) for preventing rotational movement of the nut (116) while allowing linear motion of the nut (116). A first magnetic sensor (120) is positioned along a length of the threaded portion (108) of the nut (116) for measuring a linear position of the nut (116). A second magnetic sensor (124) is provided for measuring an angular position of the shaft (105). Signal processing circuitry (130) is coupled to receive outputs from both the first magnetic sensor (120) and second magnetic sensor (124) for calculating a parameter relating to an angular position of the rotatable member.

대표청구항 ▼

We claim: 1. An angular position sensor, comprising:a shaft having a threaded portion, and a structure for engaging an external application that involves rotation of a rotatable member, said rotation of said rotatable member rotating said shaft, wherein said shaft includes a first permanent magnet;a

We claim: 1. An angular position sensor, comprising:a shaft having a threaded portion, and a structure for engaging an external application that involves rotation of a rotatable member, said rotation of said rotatable member rotating said shaft, wherein said shaft includes a first permanent magnet;a nut having threading threaded on said threaded portion; wherein said nut is formed from a first magnetic permeable material or comprises a second permanent magnet;at least one constraint coupled to said nut for preventing rotational movement of said nut while allowing linear motion of said nut;a first magnetic sensor positioned along a length of said threaded portion of said nut for measuring a linear position of said nut;a second magnetic sensor for measuring an angular position of said shaft, and signal processing circuitry coupled to receive respective outputs from said first magnetic sensor and said second magnetic sensor for calculating a parameter relating to an angular position of said rotatable member, wherein said parameter comprises a turn count, and wherein said microcontroller derives a course measured position portion comprising an integer number of turns of said turn count from said linear position of said nut provided by said first magnetic sensor and a fine measured position portion fractional portion of said turn count from said angular position of said shaft from said second magnetic sensor.