900results about "Point coordinate measurements" patented technology

Apparatus for a CMM Arm with Exoskeleton is provided comprising an Internal CMM Arm with a base end and a probe end, and an Exoskeleton driving the Internal CMM Arm through a plurality of transmission. One or more contact probes, optical probes and tools are mounted on the probe end. The CMM Arm with Exoskeleton is provided in manually operable and automated embodiments. The CMM Arm with Exoskeleton is operable for accurate measurement or for performing accurate operations. Methods are provided for operation of the CMM Arm with Exoskeleton.

A magnetic field position and orientation measurement system contains, confines and re-directs the magnetic field from one or more transmitters such that the fields are attenuated in areas outside of the operating volume in areas where metallic objects are commonly found. A thin barrier made of a highly permeable material such as ferrite or mumetal is placed on top of a conductive plate. The thickness of the permeable layer is from 0.01 inches to 0.25 inches while the conductive plate, preferably made of an aluminum alloy, may preferably be from {fraction (3 / 16)} of an inch to ¼ inch in thickness. On top of the permeable barrier, a rhombic three axis transmitter is placed. In the preferred embodiment, the transmitter consists of a PC board carrying the transmitter. PC boards having thicknesses varying from 0.03125-0.125 inches may be employed. Thus, the entire "stack" including the transmitter, the permeable barrier and the conductive plate may only be from ½ inch to ⅝ of an inch in thickness. The permeable barrier may have a flat, planar configuration. Alternatively, it may be made to resemble, in cross-section, a cake pan having a flat central region with uplifted peripheral edges. Alternatively, the permeable barrier may have a generally flat configuration with peripheral edges that taper outwardly from the top surface thereof to the bottom surface thereof with the taper making an angle with the bottom surface in the range of, preferably, 30° to 85°.

The invention relates to a connection device associated with an arm of an articulated three-dimensional measuring appliance, the device comprising a moving assembly and a fixed assembly, together with connection means for providing an electrical link between said two assemblies. In accordance with the invention, the moving assembly comprises first and second adjacent components on a common axis, the first component being constrained to rotate with the jointed end of the arm and being connected to the second component by a coupling system having successive dogs so that said second component is entrained in rotation only after said first component has turned through significantly more than one revolution in the same direction, and the connection means comprise facing contact members carried respectively by the fixed assembly and by the second component, arranged to provide a continuous electrical link in normal operation and a link that is restricted to a short angular range of rotation once the second component is entrained in rotation by the first component.

A method of monitoring a position of a medical instrument with respect to a patient's body, including positioning a patient reference unit on a portion of the patient's body; positioning a remote unit with respect to the medical instrument; associating at least one field sensor with at least one of the patient reference unit and the remote unit; generating an electromagnetic position characteristic field; producing position data responsive to a sensor output signal that is responsive to the presence of the electromagnetic position characteristic field such that the sensor output signal is representative of a position of the remote unit with respect to the patient reference unit; determining image data representing a plurality of images of the patient's body; and displaying an image of the patient's body based on the image data and responsive to position image data that varies for different position data.

A portable coordinate measurement machine for measuring the position of an object in a selected volume comprises includes an a positionable articulated arm having a plurality of jointed arm segments. The arm includes a measurement probe having an integrated line laser scanner mounted thereon. The laser may be a fiber coupled laser. Wireless data transfer and communication capability for the CMM is also possible.

A portable articulated arm coordinate measuring machine is provided. The coordinate measuring machine includes a base with an arm portion. A probe end is coupled to an end of the arm portion distal from the base. The probe end has a fastener and a first connector. A device is removably coupled to the probe end by the fastener, the accessory having a second connector arranged to engage the first connector when the fastener couples the device to the probe end.

Certain embodiments of the present invention provide a system and method for electromagnetic tracking using a three-coil wireless transmitter. The electromagnetic tracking system includes an instrument manipulated by a user to perform a task, a wireless transmitter for broadcasting a wireless signal, a receiver assembly for receiving the wireless signal, and electronics for determining positioning information for the instrument based on a relationship between the receiver assembly and the wireless transmitter. In an embodiment, the wireless transmitter includes a wireless transmitter coil trio. In an embodiment, the receiver assembly includes two receiver coil trios.

A medical system tracks the position of a medical instrument within a body of a patient. The medical instrument includes an electromagnet structure having an inductor coil wound around a core. A control circuit applies a low frequency excitation signal across the inductor coil. The inductor coil and the core generate a magnetic field. A plurality of sensors sense parameters of the generated magnetic field and produce sensor signals. The control circuit calculates the position of the medical instrument based on the produced sensor signals.

A sensor module for a probe head of a tactile coordinate measuring machine has a frame forming a stationary module base, thereby defining a first measurement plane. A moving part is connected to the frame via webs. Each web has a thick-material web portion arranged between two thin-material web portions, if seen in a cross section perpendicularly to the first measurement plane. The thick-material web portion has a material thickness greater than the corresponding material thickness of the thin-material web portions.

A stylus includes a stem with a first end and a second end, wherein the stem includes a contact element at the first end and can be arranged with the second end in a holder, and wherein the stylus includes an RFID chip. Also, a measurement device including the stylus and a method for taking account of data characterizing the stylus in a measurement device is provided.

A medical device and position sensor combination for use in medical applications comprises a position sensor having a core made of a high permeable material The core material is made of a Wiegand effect material comprising a mixture of cobalt, vanadium, and iron. The position sensor has an outer diameter of approximately 0.4 mm and is used in a medical device having an outer diameter of approximately 0.67 mm.

The invention relates to an articulated-arm three-dimensional measurement apparatus having a plurality of articulation axes with angle encoders integrated in said arms for individually measuring the angles of rotation about each of said articulation axes. In accordance with the invention, at least one of the arms (4; 5) of the apparatus (1) includes a hollow tube (4.11; 5.11) interposed between two arm segments, one of which receives an angle encoder measuring the angle of rotation about the longitudinal axis of said arm, said hollow tube presenting at each of its ends respective abutment configurations complementary to abutment configurations at the adjacent arm segment ends so as to ensure alignment on the axis of the arm that is accurate, stable, and repeatable independently of the clamping of the abutting ends in question one against the other, coupling between said hollow tube and said arm segment being provided at said abutting ends by demountable clamping means (10) enabling the hollow tube to be replaced on site by another hollow tube of different length without it being necessary to recalibrate the entire apparatus.

A method and apparatus for controlling and providing force feedback using an interface device manipulated by a user. A microprocessor is provided local to the interface device and reads sensor data from sensors that describes the position and / or other information about an object grasped and moved by the user, such as a joystick. The microprocessor provides the sensor data to a host computer that is coupled to the interface device by a communication bus that preferably includes a serial interface. In a “host-controlled” embodiment, the host computer calculates force values using the sensor data and other parameters of a host application program and sends the force values to the local microprocessor, which directly provides the force values to actuators to apply forces to the user object. In a “reflex” embodiment, the host computer sends high level supervisory commands to the local microprocessor, and the microprocessor independently implements a local process based on the high level command for reading sensor data and providing force values to the actuators using sensor data and other parameters.

A portable articulated arm coordinate measurement machine (AACMM) can include a manually positionable articulated arm portion, a measurement device attached to the first end, a structural component of the AACMM, wherein the structural component has an axial direction, at least three strain gage sensors, each having a sensitive axis, coupled to the structural component, wherein the sensitive axis of each strain gage sensor is oriented approximately parallel to the axial direction, each strain gage sensor is approximately intersected by a transverse plane perpendicular to the axial direction, each strain gage sensor produces an analog strain gage signal, and the strain gage sensors are disposed to provide data sufficient to determine a bending strain at any point residing on both the structural component and the transverse plane and an electronic circuit that receives the position signal and provides data corresponding to a position of the measurement device.

A portable articulated arm coordinate measurement device is provided. The coordinate measurement device includes a base and an articulated arm portion having at least one arm segment. A biasing member is coupled on a first end to the base and on a second end to the articulated arm portion. The first end of the biasing member is movable between a first position and a second position. An adjuster is coupled between the base and the biasing member. The adjuster is coupled to move the first end of the biasing member from the first position to the second position.

A method and apparatus for controlling and providing force feedback using an interface device manipulated by a user. A microprocessor is provided local to the interface device and reads sensor data from sensors that describes the position and / or other information about a user object moved by the user, such as a joystick. The microprocessor controls actuators to provide forces on the user object and provides the sensor data to a host computer that is coupled to the interface device. The host computer sends high level host commands to the local microprocessor, and the microprocessor independently implements a local reflex process based on the high level command to provide force values to the actuators using sensor data and other parameters. A provided host command protocol includes a variety of different types of host commands and associated command parameters. By providing a relatively small set of high level host commands and parameters which are translated into a panoply of forces, the protocol further shifts the computational burden from the host computer to the local microprocessor and allows a software developer to easily create force feedback applications.

A surface-tracking measuring machine is provided, in which measurement range is enlarged while keeping a measuring force, responsivity, resolution thereof. For the object, the surface-tracking measuring machine has a frame (10), a probe (11) swingably supported by the frame (10) and having a tracer (15) at an end thereof, a measuring force controller (21) for controlling the measuring force applied to the probe, a displacement detector (31) for detecting a displacement of the probe, a measuring force detector (41) for detecting the measuring force applied to the probe, and a controller (51) for comparing a measuring force detected value detected by the measuring force detector and a previously commanded measuring force command value and to control the measuring force controller so that the measuring force detected value is equal to the measuring force command value.

A portable articulated arm coordinate measuring machine (AACMM) includes a manually positionable arm portion having opposed first and second ends, the arm portion including connected arm segments, each arm segment including at least one position transducer for producing a position signal, a measurement device attached to a first end of the AACMM, and an electronic circuit which receives the position signals from the transducers and provides data corresponding to a position of the measurement device. Implementing the portable AACMM includes identifying a source device from which data is received by determining a transmission path through which the data is transmitted, the source device removably attached to the first end of the AACMM, determining a data type of the data based upon identification of the source device, performing an action on the data responsive to the data type, and outputting results of performing the action to a destination device.

The invention relates to a coordinate measuring machine (CMM) for determining a measuring position of a probe. The CMM comprises an articulated arm having first and second ends and at least one joint between the first and the second end, the first end forming a base being positionable on a supporting surface, the second end being movable relative to the first end and having attached the probe. Further exists at least one sensing unit for measurement of an actual relative setting of said at least one joint and at least one computing unit for calculating a measuring position of the probe relative to the base, as well as for referencing the measuring position in an external coordinate system by using a provided base-position in the external coordinate system.

A portable articulated arm coordinate measuring machine (AACMM) with multi-bus arm technology that includes a manually positionable articulated arm portion, a measurement device, and an electronic circuit. The electronic circuit is configured to receive a position signal from the arm portion and to provide data corresponding to a position of the measurement device. The AACMM further includes a probe end, an accessory device, an encoder data bus, and a first device data bus. The encoder data bus is coupled to the arm portion and the electronic circuit, and the encoder data bus is configured to send the position signal to the electronic circuit. The first device data bus is coupled to the accessory device and the electronic circuit. The first device data bus is configured to operate simultaneously with and independently of the encoder data bus for sending accessory device data from the accessory device to the electronic circuit.

A method for scanning a surface of a workpiece using a scanning probe 2 mounted on a support 3 on a coordinate measuring machine 4. The support contains drive means 5, 7 for actuating the movement of the scanning probe 2 relatively to the support 3. The method further involves detecting means 9 to measure a contact force F applied between the tip 10 of the probe and the surface 1, control means 13 coupled to the drive means, and memory means 14 for storing theoretical profiles 19 and coordinates 20 of the surface. This method is characterized by the fact that the control means 13 adjust the actuation of the drive means 5, 7 along a scanning path 18 in order to maintain the contact force 11 within the defined range of values 15 during the whole scanning operation along the scanning path 18.

An interface device for use with a computer that provides locative data to a computer for tracking a user manipulatable physical object and provides feedback to the user through output forces. The physical object is movable in multiple degrees of freedom and is tracked by sensors for sensing the location and orientation of the object. A device processor can be responsive to the output of the sensors and can provide the host computer with information derived from the sensors. The host computer can provides images on a display, where the computer responds to the provided sensor information and force feedback is correlated with the displayed images via force feedback commands from the host computer.

A probe, connectable to a machine tool, having an electric generator (16), supplying an electric or electronic circuit (22) with electric power, and a driving element (28), capable of relative rotation with respect to the stator of the electric generator. The rotation axis of the driving element is preferably a symmetry axis of the probe itself. The driving element is not connected to any external energy source, and can be set in rotation simply by activating the rotary axis of the machine tool.Advantageously, the driving element of the present invention is not directly connected with any mobile element of the machine tool, but is either rotatably mounted on the probe itself, or fixed on the reference table of the machine tool. Importantly, the inventive probe requires no additional connections to the machine tool on which it is mounted, besides the connection to the rotary spindle, which can be realized with a conventional tool-holder with a standardised tapered shank. In this way the inventive probe is fully compatible with standard probes, and can be mounted and used with standard tool-holders, without any adaptation. The self-powering function of the probe can be activated simply by sending appropriate rotation instructions to the machine tools.

Systems and methods for determining location using magnetic fields from AC power lines are provided. As an example, each magnetic field reading collected by the device over time can be analyzed to determine a plurality of characteristics of the magnetic field. One or more of the plurality of characteristics can describe a component of the magnetic field that oscillates at a frequency associated with the AC power lines. The plurality of characteristics can be compared to expected values respectively associated with a plurality of locations and provided by a map of the magnetic field to determine a location at which each magnetic field reading was collected. In further embodiments, magnetic field readings collected by the device over time can be analyzed in conjunction with other data or constraints to determine a trajectory of the device. In addition, the map can be updated using the collected readings and the determined trajectory.