GB2225767A

GB2225767A - Manipulator for electromagnetic field detecting coil

Info

Publication number: GB2225767A
Application number: GB8823485A
Authority: GB
Inventors: Mohammad Javad Birjandi
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-10-06
Filing date: 1988-10-06
Publication date: 1990-06-13
Also published as: GB8823485D0

Abstract

A manipulator constructed of metal-free constituents, capable of supporting, eg. electromagnetic field detecting search coils (or probes or sensors) on rod e within the path of electromagnetic fields, providing controllable mobility along several degrees of freedom, eg. along lines 3-3, 4-4, 5-5, in XYZ directions, optionally with motor drive. An alternative embodiment has a circular body with a diametral apertured rod, the rod e being slidable through one of said apertures and movable in a vertically circular path. <IMAGE>

Description

An Apparatus For Precise Ad Three Dimensional Steering Of A Field Detecting Search Coil Within An Electromagnetic Field: For Particular Use With Hyperthermic And Nuclear Magnetic Resonance (NMR) Applicators I Mohammad Javad Birjandi of 88 Stockethill Court, Aberdeen, AB2 5UQ, Scotland, Great Britain, do hereby declare the invention, for which I pray that a patent may be granted to me, and the method by which it is to be performed, to b particularly described in and by the following statement: This invention relates to provision of the radical means by which precise positioning of radiation detecting search coils (or probes), within the radiated electromagnetic fields, may be achieved.

Previous applications have failed to be: precise, stable, multipurpose, rather metal-free, applicable, and available.

It is an object of this invention to introduce t.

partially (or fully if desired) automated calibrated, multipurpose, rather metal-free, support structure (eg: for supporting electromagnetic field detecting search coils that provides integral movements in fo degrees of freedom.

The embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawings and diagrams, in which Figure 1 shows the calibrated, claimed, prototype invention providing accruate mobility in three degrees freedom.

Figure 2 is perspective view of a calibrated circular support, part of the invention claimed herein, providing accurate mobility in three degrees of freedom (not necessarily identical to those claimed in figure 1).

Figure 3 is top view of figure 2 along plane 1-1 with module e absent).

Figure 4 is perspective view of figure 2 along plane 2-2 With reference to figure 1, an apparatus, capable of steering precisely an electromagnetic field detecting search coil within the path of the appropriate fields, is invented and is capable of providing controlled mobility along three degrees of freedom.

The three degrees of freedom claimed here in figure 1, are provided along lines 3-3, 4-4, and 5-5.

Alternatively, as mentioned in the preceding sentence but With the mobility of module e along line 3-3 being replaced by the mobility of module c along an extra line 9-9, or a combination of both claims (i.e. mobility of module e along line 3-3, together wit that of module c along line 9-9).

With reference to figure 2, being one approach for achieving the invention claimed here in, four vertical modules a (numbers selected as desired) are mounted along plane 4-4, on a base b which fits precisely iid the groove (dimensIons as desired of the. mounting-base c (and thereafter locked to mounting-base c' which may in turn be fixed to the working surface 5 mean.

screw d tor b any other means).

A long horisontal module e fits precisely, and with high stability, through a stable bore f which is in turn mounted on the modules a with respect to which it is calibrated against.

The module e is grooved (or as desired) to provide residence for any cables/wires which may be leaving the field detecting search coils that are to be placed at the end of (or at any desired point along) the module e.

The module e may be moved along plane 3-3 either manually or by step motor g.

The bore f, is calibrated against modules , and may be moved along plane 4-4 either manually or by step motor The module b, is calibrated against the mounting base c, and may be moved along plane 5-5 either manually or by step motor g.

Step motors either use strings or wires (or a material of such nature) to move e, f, or c; or use coded grooves already mounted on e, f, and c accordingly.

With reference to figures 1 and 2, the base b in figure 1 may be replaced by the base b in figure , which may then be moved and thereafter locked along line 5-5 of figure 1.

With reference to figure 2, This invented replacement, completes the invent Ion claimed In figure 1, and provides three degrees of freedom along planes 6-6, 7-7, and 8-8; thus accountings for use with both linear or cylindrical (or any desired shape) applicators.

Two verticla planar modules J, k, and two horisontal planar modules h, # (each of which are grooved as illustrated in figures 3 and 4, or as desired) accommodate precisely a circular module m which comprises a linear module n that passes through its centre as referenced in figure 2 The module n comprises bores o (any desirable numbers) with a pitch p and diameter I, and is fixed to module Zn.

With reference to figure 4, module Zn fits and passes through the grooves u of modules h, #, J and k.

Wit reference to figure 3, module m is held in position by means of pins s (via modules J and k, and via modules h and # in a similar manner as claimed for modules J and k) which fit in its grooves t (on both sides), and by assistance of optional, one way locking nudges r (fixed to modules h, k and i).

With reference to figure 2, module m is calibrated against modules h, J, k and #, and may be moved along circumferential plane 6-6 either manually or by step motor g as and according to the claims made in an earlier paragraph.

Module e of figure 1, claimed herein, 15 calibrated against bores o, and may be moved along plane 7-7 either manually or by step motor g as and according to the claims made in an earlier paragraph.

Module e may also be moved along plane 8-8, as referenced in figure 2, either manually or using step motor g (as referenced in figure 3) (as and according to the claims made in an earlier paragraph) which can move arid thereafter lock along plane 8-8.

The claimed Module e may have at its outer extreme a miniature plug or connecting points to which the cables/wires of the field detecting search coil may be connected, for easy removal.

Module h, claimed herein, may be mounted (by means of screws d, or any other means, as desired) either directly onto module b, or onto a fine, sensitive, and accurate jack v via plates w one of which is inturn mounted on module h (as desired). Modules b and h are herein calibrated with respect t each other.

As referenced in figure 2, the jack v provides mobility along line 1-1. This inturn assists in calibrating the apparatus with respect to the desired applicator.

The apparatus claimed hereabove: provides four degrees of freedom, may be used manually, or, may be automated and manipulated by appropriate means. Also, it permits the search coils to reside in module e in planes either parallel or perpendIcular to it.

DImensions of the modules are selected as desired.

Claims

1. A apparatus with a wide dynamic range, commprising a plurality of modules arranged to form a number of interchangeable collective nodules sharing one base module, wherein each of or a group of or the plurality of said modules comprise rather metai-free constituents, providing a number of degrees of freedom.

2. An apparatus as claimed in claim 1. wherein one or a plurality of eiettromagnetic field: detectors or detecting search coils or sensers are integralled or supported

3. An apparatus as claimed in either claim 1 or claim 2, wherein any one of said collective modules comprises one or a plurality of vertical or horizontal or long linear modules.

4. An apparatus as claimed.in any one of claims 1 to 3, wherein any one of said collective modules comprises a circular or a rotating module which in-turn has one or a number of integral fixed or rotating linear modules.

5. An apparatus as claimed in claim 4, wherein said integral linear modules comprise a number of desirably positioned holes of desirable dimensions.

6. An apparatus as claimed in any one of claims 1 or 2, wherein any one of said collective modules provides vertical degrees of freedom by mechanical or hydraulic or other assisted means.

7. An apparatus as claimed in any one of claims 1 to 6, wherein said modules may be grooved.

8. An apparatus substantially as hereinbefore described with reference to figure 1.

9. An apparatus substantially as hereinbefore described with reference to figure 1 and complemented by any modules of or the whole of figure 2.

10. An apparatus substantially as hereinbefore:described with reference to figure 1 and complemented by any modules of or the whole of figure 2, with the claimed vertical degree of freedom of figure 2 modified on the same principles as that referenced in figure 1.