Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B5/00—Measuring for diagnostic purposes; Identification of persons
  • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
  • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
  • A61B5/1101—Detecting tremor
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
  • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
  • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
  • G01S13/50—Systems of measurement based on relative movement of target
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
  • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
  • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
  • A61B2562/18—Shielding or protection of sensors from environmental influences, e.g. protection from mechanical damage
  • A61B2562/182—Electrical shielding, e.g. using a Faraday cage

Definitions

• the invention relates to a method and a device for determining the movement sequence of an object
• the degree of tremors and here in particular the size of the rashes or the frequency of the rashes, give the doctor an indication of the progress of the disease.
• the free movement for example the hand of one
• ultrasound transmitter for example an ultrasound transmitter or one
• Another method is to record the movement sequence using a so-called CCD camera and then evaluate it using appropriate analytical methods.
• the electromagnetic field is characterized, whereby the movement of the object in the electromagnetic field causes disturbances that cause voltage changes that are measured to determine the course of movement.
• the method is characterized in that an electromagnetic field of a certain frequency is generated in a defined space by means of a transmitter, the rays of the electromagnetic field of
• Receivers are recorded, whereby when an object enters the electromagnetic field, disturbances in the field are caused, which lead to a voltage change at the receivers, and the movement sequence in the X, Y and Z directions can be determined depending on the magnitude of the voltage changes .
• the method for determining the movement sequence in the X, Y and Z directions is characterized in particular in that, in order to determine the coordinate in the X direction, the difference in the voltages which is present at the receivers in
• the device for carrying out the method consists of a housing provided with an opening made of, for example, acrylic glass, in particular a square housing, a transmitter being arranged on a housing wall, and the other housing walls a corresponding receiver
• the transmitter and receiver are plate-shaped and rest on the outside of the housing walls.
• Apparatus is that the transmitter is arranged in a square housing on the rear wall, and that both the side walls and the top and bottom of the housing are each provided with a receiver, and that as
• Opening the housing the front wall is omitted.
• the housing itself In order to prevent field propagation to the outside and thus interference from outside, the housing itself is shielded in the manner of a Faraday cage.
• the method according to the invention is based on the fact that electromagnetic lights emitted by a transmitter are deflected towards a corresponding receiver. in the
• the receivers are designed in such a way that a certain voltage is applied to each receiver when the beam path is undisturbed. If an object is inserted into the housing, for example a hand, the electromagnetic field is disturbed. This interference has the effect that on the receiver, in the
• the method and the device can not only be used in the medical field, but can also be used, for example, to control a robot arm.
• Fig. 1 shows the device in a spatial
• Fig. 2 explains the beam path in one
• Fig. 3 shows the circuit arrangement
• the housing is generally designated 1, the transmitter 3 being located on the housing wall 2.
• the plate-shaped receivers 6 and 7 are assigned to the housing walls 4 and 5; on the housing cover 8 and on the
• the bottom of the housing 9 contains the plate-shaped receivers 10 and 11.
• the transmitter and receiver can be designed as a metal plate or metal mesh.
• the omitted front wall of the housing 1 serves as the opening 13.
• Beams from the transmitter 3 to the receivers 6, 7 are deflected. If, for example, there is an object X in the area of the radiation field of one receiver 7, the voltage applied to this receiver is reduced. The current position of the object is now determined by determining the difference between the voltages applied to the receivers 6, 7. The position in the X direction results here. The position of the object in the Y direction is determined in the same way (receiver 10, 11). To determine the position of the object in the Z direction, the sum of all voltages applied to the receivers 6, 7 and 10, 11 is formed.
• the two pairs of receivers 25, 26 each represent
• Receiver for determining the X and Y directions From the drawing it can be seen that the circuit for each pair of receivers 26, 27, consisting of the receivers 6 and 7, or the receivers 10, 11 is identical. As from the drawing it can be seen that the circuit for each pair of receivers 26, 27, consisting of the receivers 6 and 7, or the receivers 10, 11 is identical. As from the drawing it can be seen that the circuit for each pair of receivers 26, 27, consisting of the receivers 6 and 7, or the receivers 10, 11 is identical. As from the drawing it can be seen that the circuit for each pair of receivers 26, 27, consisting of the receivers 6 and 7, or the receivers 10, 11 is identical. As from the drawing it can be seen that the circuit for each pair of receivers 26, 27, consisting of the receivers 6 and 7, or the receivers 10, 11 is identical. As from the
• an impedance converter 14 is connected to each receiver, which is followed by an amplifier 15 for amplifying the output voltage of the impedance converter 14, the output voltage of the
• Amplifier 15 is supplied to a rectifier 16. Since there are two receivers in each direction, the circuit described above results for each pair of receivers 26, 27. To determine the position in the X and Y directions, the output voltages emitted by the rectifiers 16 of each pair of receivers 26, 27 each become one
• the voltages output by the rectifiers 16 of each pair of receivers 26, 27 are each fed to a summing amplifier 20, which performs a separate summation of the respective pair
• each summing amplifier 20 being followed by an amplifier 21 and a module 22 for linearizing the voltage output by the amplifier 21.
• the output voltages output by the two modules 22, which determine the position of the object in the X and Y directions, are in turn fed to a summing amplifier 23, which carries out the summation of the voltages in the X and Y directions.
• Circuit arrangement is characterized in that each impedance converter 14 of the circuit of each pair of receivers 26, 27 is followed by a filter 24, which eliminates external influences acting on the receiver.
• Such interference can be, for example, the frequency of the power grid.

Landscapes

• Engineering & Computer Science (AREA)
• Remote Sensing (AREA)
• Life Sciences & Earth Sciences (AREA)
• Health & Medical Sciences (AREA)
• Physics & Mathematics (AREA)
• Radar, Positioning & Navigation (AREA)
• General Physics & Mathematics (AREA)
• Animal Behavior & Ethology (AREA)
• Electromagnetism (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Medical Informatics (AREA)
• Molecular Biology (AREA)
• Surgery (AREA)
• Biophysics (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Pathology (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Environmental & Geological Engineering (AREA)
• Geology (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Dentistry (AREA)
• Geophysics (AREA)
• Physiology (AREA)
• Computer Networks & Wireless Communication (AREA)
• Geophysics And Detection Of Objects (AREA)
• Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 1989
  • 1989-05-20 DE DE19893916500 patent/DE3916500A1/de active Granted
• 1990
  • 1990-05-18 WO PCT/DE1990/000372 patent/WO1990014603A1/de not_active Ceased
  • 1990-05-18 EP EP19900906910 patent/EP0472549A1/de not_active Withdrawn

Non-Patent Citations (1)

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