Apparatus for measuring the magnetic field produced by an insertion device
First Claim
1. An apparatus for measuring a magnetic field produced by an insertion device comprising:
- (a) a magnetic field strength sensor, wherein the sensor produces an output signal;
(b) a first stage for positioning the sensor along a first axis of the insertion device, wherein;
(i) the first stage comprises;
(a) a first stage carriage,(b) first stage guide means comprising a first end and a second end,(c) a first stage motor,(d) a first stage drive mechanism, and(e) first stage position-sensing means, and(ii) the first stage guide means is mounted on the insertion device, wherein;
(f) the axis of the first stage guide means is parallel with the first axis, and(g) the first axis is the long axis of the insertion device;
(c) means for controlling position of the first stage;
(d) a second stage for positioning the sensor along a second axis of the insertion device, wherein;
(i) the second stage comprises;
(a) a second stage carriage,(b) second stage guide means,(c) a second stage motor,(d) a second stage drive mechanism, and(e) second stage position-sensing means,(ii) the second axis is perpendicular to the first axis, and(iii) the second stage is mounted on the first stage;
(e) means for controlling position of the second stage;
(f) a third stage for positioning the sensor along a third axis of the insertion device, wherein;
(i) the third stage comprises;
(a) a third stage carriage,(b) third stage guide means,(c) a third stage motor,(d) a third stage drive mechanism, and(e) third stage position-sensing means,(ii) the third axis is perpendicular to the first axis and to the second axis;
(iii) the third stage is mounted on the second stage, and(iv) the sensor is mounted on the third stage;
(g) means for controlling position of the third stage; and
(h) information storage means for reading the output signal from the sensor operably connected to the sensor.
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Abstract
The invention provides an apparatus for measuring the magnetic field strength between the magnet arrays of an insertion device in an X-ray generating system comprising a magnetic field strength sensor that produces an output signal, three stages for positioning the sensor along the X, Y and Z axes of the insertion device, means for controlling positions of the stages and information storage means for reading the output signal operably connected to the sensor. The apparatus eliminates the need for a dedicated measurement facility by mounting guide means for the long (Z-)axis directly to the insertion device. This long-axis guide means can be permanently or temporarily mounted to the insertion device. The remainder of the measurement apparatus may then be transferred onto the long-axis guide means while measurements and, if necessary, adjustments are made. The apparatus is compact, allowing greater access to magnet arrays for adjustment than existing systems.
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Citations
24 Claims
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1. An apparatus for measuring a magnetic field produced by an insertion device comprising:
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(a) a magnetic field strength sensor, wherein the sensor produces an output signal; (b) a first stage for positioning the sensor along a first axis of the insertion device, wherein; (i) the first stage comprises; (a) a first stage carriage, (b) first stage guide means comprising a first end and a second end, (c) a first stage motor, (d) a first stage drive mechanism, and (e) first stage position-sensing means, and (ii) the first stage guide means is mounted on the insertion device, wherein; (f) the axis of the first stage guide means is parallel with the first axis, and (g) the first axis is the long axis of the insertion device; (c) means for controlling position of the first stage; (d) a second stage for positioning the sensor along a second axis of the insertion device, wherein; (i) the second stage comprises; (a) a second stage carriage, (b) second stage guide means, (c) a second stage motor, (d) a second stage drive mechanism, and (e) second stage position-sensing means, (ii) the second axis is perpendicular to the first axis, and (iii) the second stage is mounted on the first stage; (e) means for controlling position of the second stage; (f) a third stage for positioning the sensor along a third axis of the insertion device, wherein; (i) the third stage comprises; (a) a third stage carriage, (b) third stage guide means, (c) a third stage motor, (d) a third stage drive mechanism, and (e) third stage position-sensing means, (ii) the third axis is perpendicular to the first axis and to the second axis; (iii) the third stage is mounted on the second stage, and (iv) the sensor is mounted on the third stage; (g) means for controlling position of the third stage; and (h) information storage means for reading the output signal from the sensor operably connected to the sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for measuring magnetic fields produced by at least two insertion devices comprising:
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(1) installing on a first insertion device an apparatus for measuring a magnetic field produced by the insertion device wherein the apparatus comprises a removable portion and wherein the apparatus comprises; (a) a magnetic field strength sensor, wherein the sensor produces an output signal; (b) a first stage for positioning the sensor along a first axis of the insertion device, wherein; (i) the first stage comprises; (a) a first stage carriage, (b) first stage guide means comprising a first end and a second end, (c) a first stage motor, (d) a first stage drive mechanism, and (e) first stage position-sensing means, and (ii) the first stage guide means is mounted on the insertion device, wherein; (f) the axis of the first stage guide means is parallel with the first axis, and (g) the first axis is the long axis of the insertion device; (c) means for controlling position of the first stage; (d) a second stage for positioning the sensor along a second axis of the insertion device, wherein; (i) the second stage comprises; (a) a second stage carriage, (b) second stage guide means, (c) a second stage motor, (d) a second stage drive mechanism, and (e) second stage position-sensing means, (ii) the second axis is perpendicular to the first axis, and (iii) the second stage is mounted on the first stage; (e) means for controlling position of the second stage; (f) a third stage for positioning the sensor along a third axis of the insertion device, wherein; (i) the third stage comprises; (a) a third stage carriage, (b) third stage guide means, (c) a third stage motor, (d) a third stage drive mechanism, and (e) third stage position-sensing means, (ii) the third axis is perpendicular to the first axis and to the second axis; (iii) the third stage is mounted on the second stage, and (iv) the sensor is mounted on the third stage; (g) means for controlling position of the third stage; and (h) information storage means for reading the output signal from the sensor operably connected to the sensor; (2) measuring a magnetic field produced by the first insertion device with the apparatus; (3) removing the removable portion of the apparatus from the first insertion device; (4) installing the removable portion of the apparatus on a second insertion device; and (5) measuring a magnetic field produced by the second insertion device with the apparatus installed on the second insertion device. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification