Multiturn rotary encoder with multiple code carriers coupled by a reduction gear

A multi-turn rotary encoder, comprising:

• a first code carrier connected with an input shaft;
• a scanning device that scans said first code carrier and generates an absolute position of said input shaft within one revolution, and a digital code word is present at an output of said scanning device;
• a second code carrier for measuring the number of revolutions of said input shaft;
• a reduction gear arranged between and coupled to said first code carrier and said second code carrier;
• said second code carrier comprises a magnetic body with at least one north and south pole;
• a substrate with a spatial arrangement of sensor elements integrated therein, which are sensitive to magnetic fields, is associated with said magnetic body;
• an evaluation circuit integrated into said substrate, wherein scanning signals, which are phase-shifted with respect to each other, from said sensor elements are supplied, and that said evaluation circuit combines said scanning signals in such a way that a second digital code word is present serially or in parallel at an output of said evaluation circuit;
• a combination logical device, which is supplied with said first and second digital code words and which forms a resultant multi-digit code word therefrom;
• wherein said second code carrier comprises a magnetic body with only a single north and south pole, so that each of said sensor elements generates a periodic sinusoidal scanning signal per revolution of said magnetic bodies.

A multi-turn rotary encoder, comprising:

• a first code carrier connected with an input shaft;
• a scanning device that scans said first code carrier and generates an absolute position of said input shaft within one revolution, and a digital code word is present at an output of said scanning device;
• a second code carrier for measuring the number of revolutions of said input shaft;
• a reduction gear arranged between and coupled to said first code carrier and said second code carrier;
• said second code carrier comprises a magnetic body with at least one north and south pole;
• a substrate with a spatial arrangement of sensor elements integrated therein, which are sensitive to magnetic fields, is associated with said magnetic body;
• a third code carrier, wherein said second and third code carriers are driven at different reductions by said input shaft, and each of said second and third code carriers is scanned by corresponding first and second semiconductor substrates;
• an evaluation circuit integrated into said substrate, wherein scanning signals, which are phase-shifted with respect to each other, from said sensor elements are supplied, and that said evaluation circuit combines said scanning signals in such a way that a second digital code word is present serially or in parallel at an output of said evaluation circuit;
• and
• a combination logical device, which is supplied with said first and second digital code words and which forms a resultant multi-digit code word therefrom.

A multi-turn rotary encoder, comprising:

• a first code carrier connected with an input shaft;
• a scanning device that scans said first code carrier and generates an absolute position of said input shaft within one revolution, and a digital code word is present at an output of said scanning device;
• a second code carrier for measuring the number of revolutions of said input shaft;
• a reduction gear arranged between and coupled to said first code carrier and said second code carrier;
• said second code carrier comprises a magnetic body with at least one north and south pole;
• a substrate with a spatial arrangement of sensor elements integrated therein, which are sensitive to magnetic fields, is associated with said magnetic body and wherein said substrate comprises a semiconductor;
• an evaluation circuit integrated into said substrate, wherein scanning signals, which are phase-shifted with respect to each other, from said sensor elements are supplied, and that said evaluation circuit combines said scanning signals in such a way that a second digital code word is present serially or in parallel at an output of said evaluation circuit;
• and
• a combination logical device, which is supplied with said first and second digital code words and which forms a resultant multi-digit code word therefrom.

A multi-turn rotary encoder, comprising:

• a first code carrier connected with an input shaft;
• a scanning device that scans said first code carrier and generates an absolute position of said input shaft within one revolution, and a digital code word is present at an output of said scanning device;
• a second code carrier for measuring the number of revolutions of said input shaft;
• a reduction gear arranged between and coupled to said first code carrier and said second code carrier;
• said second code carrier comprises a magnetic body with at least one north and south pole;
• a substrate with a spatial arrangement of sensor elements integrated therein, which are sensitive to magnetic fields, is associated with said magnetic body and wherein each of said sensor elements comprises a Hall element;
• an evaluation circuit integrated into said substrate, wherein scanning signals, which are phase-shifted with respect to each other, from said sensor elements are supplied, and that said evaluation circuit combines said scanning signals in such a way that a second digital code word is present serially or in parallel at an output of said evaluation circuit;
• and
• a combination logical device, which is supplied with said first and second digital code words and which forms a resultant multi-digit code word therefrom.

A multi-turn rotary encoder, comprising:

• a first code carrier connected with an input shaft;
• a scanning device that scans said first code carrier and generates an absolute position of said input shaft within one revolution, and a digital code word is present at an output of said scanning device;
• a second code carrier for measuring the number of revolutions of said input shaft;
• a reduction gear arranged between and coupled to said first code carrier and said second code carrier, wherein said reduction gear causes said first code carrier to rotate about a direction of rotation, as well as a displacement along a displacement direction that is superimposed on said rotation;
• said second code carrier comprises a magnetic body with at least one north and south pole;
• a substrate with a spatial arrangement of sensor elements integrated therein, which are sensitive to magnetic fields, is associated with said magnetic body;
• an evaluation circuit integrated into said substrate, wherein scanning signals, which are phase-shifted with respect to each other, from said sensor elements are supplied, and that said evaluation circuit combines said scanning signals in such a way that a second digital code word is present serially or in parallel at an output of said evaluation circuit;
• and
• a combination logical device, which is supplied with said first and second digital code words and which forms a resultant multi-digit code word therefrom.