Motion control evaluation employing a Fourier transform

• US 5,715,160 A
• Filed: 08/21/1995
• Issued: 02/03/1998
• Est. Priority Date: 08/21/1995
• Status: Expired due to Fees

• Current Assignee: Robert Jay Plotke
• Original Assignee: Robert Jay Plotke
• Inventors: Plotke, Robert Jay
• Primary Examiner(s): Elmore, Reba I.
• Assistant Examiner(s): BROWN, THOMAS
• Application Number:
  US08/517,185
• Time in Patent Office: 897 Days
• Field of Search: 364/188, 364/189, 364/167.01, 364/551.01, 364/576, 364/578, 364/579, 364/580, 364/726.01-726.07, 128/774, 128/775-781, 128/782, 128/734, 128/745, 128/630, 128/670, 128/905, 482/900, 482/902
• US Class Current: 700/66
• CPC Class Codes: G05B 19/42 Recording and playback systems, i.e. in which the programme is recorded from a cycle of operations, e.g. the cycle of operations being manually controlled, after which this record is played back on the same machine
• CPC Class Codes: G05B 2219/34048 Fourier transformation, analysis, fft
• CPC Class Codes: G05B 2219/37091 Motion and force
• CPC Class Codes: G05B 2219/37357 Force, pressure, weight or deflection
• CPC Class Codes: G05B 2219/37392 Motion
• CPC Class Codes: G05B 2219/45109 Excercise, coordination, therapy, rehabillitation robot for disabled patients
• CPC Class Codes: Y10S 482/90 Ergometer with feedback to load or with feedback comparison
• CPC Class Codes: Y10S 482/902 Employing specific graphic or video display

Abstract

An evaluation system is disclosed herein for analyzing, displaying and feedback of digital signals derived from a source of analog motion and analog force. The system includes sensors for detecting physical movement following a point-by-point measurement procedure and a digital signal generator for introducing the sensed motion and force signals to a Fourier measuring unit for analysis. Separate analysis circuits for motion characteristics and force or load characteristics from the derived signals are employed for discrete measurement. The resultant measurements and/or values are introduced to a comparator network where the measurements and/or values are compared with stored individual data and to stored universal standards. A display device such as a video monitor, visual or auditory device receives the result'"'"'s of the compared motion and force measurements and values. A feedback loop introduces the same measurements and values back to the source of sensor data to control, update and regulate further motion and force applied by the source.

Claims

1. A physical movement control and evaluation system comprising:

a source of physical movement;

sensor means coupled to said source for deriving analog signals responsive to physical movement;

digital generator means connected to said sensor for converting said analog signals to digital signals;

a measuring unit receiving said digital signal and having analyzing means for evaluating motion and force measurements from said digital signals;

a display means connected to said measuring unit and said analyzing means for displaying said evaluated motion and force measurements;

feedback means coupled between said measuring unit and said source in parallel with said display means for introducing said evaluated motion and force measurements to said source for altering the physical movement;

said measurement unit includes a Fourier analysis network having a separate motion analysis circuit and a force analysis circuit;

said Fourier analysis network outputting said evaluated motion and force measurements being based on Fourier transform calculations;

said motion analysis circuit and said force analysis circuit are coupled in parallel to said Fourier analysis network;

said display means is selected from;

a. visual display

b. auditing display

c. tactile display

d. printer; and

said display means includes means for displaying said evaluated motion and force measurements as analog or digital mathematical expressions.

2. A physical movement control and evaluation system comprising:

a source of physical movement;

sensor means coupled, to said source for deriving analog signals responsive to physical movement;

digital generator means connected to said sensor for converting said analog signals to digital signals;

a measuring unit receiving said digital signal and having analyzing means for evaluating motion and force measurements from said digital signals;

a display means connected to said measuring unit and said analyzing means for displaying said evaluated motion and force measurements;

feedback means coupled between said measuring unit and said source in parallel with said display means for introducing said evaluated motion and force measurements to said source for altering the physical movement;

said measurement unit includes a Fourier analysis network having a separate motion analysis circuit and a force analysis circuit;

said Fourier analysis network outputting said evaluated motion and force measurements being based on Fourier transform calculations;

said motion analysis circuit and said force analysis circuit are coupled in parallel to said Fourier analysis network;

said display means is selected from;

a. visual display

b. auditing display

c. tactile display

d. printer; and

said Fourier transform calculations are expressed as either single or multiple waveforms.

3. The invention as defined in claim 2 wherein:

said single waveform expresses a mathematical representation of a rate of change; and

said multiple waveform expresses a mathematical representation of a change in said rate of change, a mathematical representation of a change in frequency or a mathematical representation of a change in amplitude.

4. The invention as defined in claim 2 including:

a comparative analysis network coupled between said measuring unit and said display for receiving said evaluated motion and force measurements;

said comparative analysis network having, in parallel, an individual standard data storage and a universal standard data storage and further having circuit means for comparing said evaluated motion and force measurements with data in either or both said individual standard data storage or said universal standard data storage.

5. The invention as defined in claim 4 wherein:

said evaluated motion and force measurements are expressed in terms of units of motion and units of force and further expressed in terms of units of rate of change for motion and force.