Device and method for contact free absolute position determination
First Claim
1. A contact free arrangement in a medication delivery device for determining an absolute position of a first member moveably mounted relative to a second member, the first member being rotatably mounted and restricted for movement between a first end position and a second end position over an angle of rotation exceeding one revolution, the contact free arrangement comprising:
- at least one track of reflector means arranged on the first member,at least one emitter means arranged on the second member, the at least one emitter means being adapted to electrically couple to a number of the reflector means, andat least one receiver means arranged on the second member, the at least one receiver means being adapted to electrically couple to a number of the reflector means,generator means for generating a signal or signals and providing such signal(s) to the at least one emitter means, and processor means for processing a signal or signals from the at least one receiver means;
wherein the at least one track of reflector means forms a helical path and, wherein the at least one track of reflector means, the at least one emitter means, the at least one receiver means and the generator means are arranged in such a manner that there is provided a different electrical parameter to each respective position of the first member relative to the second member, said electrical parameter being selected from the group consisting of capacitance and inductance.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to a contact free arrangement for determining an absolute position of a member adapted for setting an amount of medicament to be injected from a medication delivery device, or adapted for determining an amount of medicament injected from a medication delivery device. The arrangement according to the present invention comprises at least one track of reflector means, at least one emitter means, and at least one receiver means. The at least one emitter means and the at least one receiver means are adapted to electrically couple to a number of the reflector means. The electrical coupling may be capacitive or inductive. In addition, the present invention relates to a medication delivery device or a syringe having such arrangement.
193 Citations
24 Claims
-
1. A contact free arrangement in a medication delivery device for determining an absolute position of a first member moveably mounted relative to a second member, the first member being rotatably mounted and restricted for movement between a first end position and a second end position over an angle of rotation exceeding one revolution, the contact free arrangement comprising:
-
at least one track of reflector means arranged on the first member, at least one emitter means arranged on the second member, the at least one emitter means being adapted to electrically couple to a number of the reflector means, and at least one receiver means arranged on the second member, the at least one receiver means being adapted to electrically couple to a number of the reflector means, generator means for generating a signal or signals and providing such signal(s) to the at least one emitter means, and processor means for processing a signal or signals from the at least one receiver means; wherein the at least one track of reflector means forms a helical path and, wherein the at least one track of reflector means, the at least one emitter means, the at least one receiver means and the generator means are arranged in such a manner that there is provided a different electrical parameter to each respective position of the first member relative to the second member, said electrical parameter being selected from the group consisting of capacitance and inductance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A method for contact free determination of an absolute position of a first member moveably mounted relative to a second member in a medication delivery device, the first member being rotatably mounted and restricted for movement between a first end position and a second end position over an angle of rotation exceeding one revolution, the method comprising:
-
providing at least one track of reflector means arranged on the first member, providing an electrical signal to at least one emitter means arranged on the second member, the at least one emitter means being electrically coupled to a number of the reflector means, and receiving an electrical signal from at least one receiver means arranged on the second member, the at least one receiver means being electrically coupled to a number of the reflector means, providing a generator means for generating a signal or signals and providing such signal(s) to the at least one emitter means, and processor means for processing a signal or signals from the at least one receiver means, providing an electrical signal to at least one emitter means by means of said generator means, and receiving an electrical signal from at least one receiver means and processing said received signal by means of the processor means to determine the absolute angular position of the first member relative to the second member, wherein the at least one track of reflector means forms a helical path and, wherein the at least one track of reflector means, the at least one emitter means, the at least one receiver means and the generator means are arranged in such a manner that there is provided different electrical parameter to each respective position of the first member relative to the second member, said electrical parameter being selected from a group consisting of capacitance and inductance. - View Dependent Claims (19, 20, 21, 22, 23, 24)
-
Specification