초록 ▼

A radioisotope proximity sensor is provided for detecting proximity or distance to a nearby object containing a small radiation source complementary to the sensor. The output of the sensor is amplified or compared to determine the distance or proximity. The radioisotope proximity sensor is unaffecte

A radioisotope proximity sensor is provided for detecting proximity or distance to a nearby object containing a small radiation source complementary to the sensor. The output of the sensor is amplified or compared to determine the distance or proximity. The radioisotope proximity sensor is unaffected by magnetic fields over the short sensing distances. It is also unaffected by environmental contamination when the appropriate radiosource/detector combination is used. The radioisotope proximity sensor is easily shielded from electrostatic or electromagnetic noise, and the radiation source can be small, easily incorporated, and requires no external power or connections to affect mechanical reliability or impede armature movement.

대표청구항 ▼

[ What is claimed is:] [1.] A proximity detecting device comprising:a source of ionizing radiation; anda sensor for detecting said source of ionizing radiation,wherein said source of ionizing radiation is disposed in a first member, and said sensor is disposed in a second member, said device detecti

[ What is claimed is:] [1.] A proximity detecting device comprising:a source of ionizing radiation; anda sensor for detecting said source of ionizing radiation,wherein said source of ionizing radiation is disposed in a first member, and said sensor is disposed in a second member, said device detecting a position of said first member relative to said second member by determining a position of said source of ionizing radiation relative to said sensor, andwherein said source of ionizing radiation and said sensor are disposed in an electromechanical actuator, and said source of ionizing radiation is disposed in an armature of said electromechanical actuator.