Method and apparatus for determining at least one characteristic value of movement of a body

• US 4,821,218 A
• Filed: 05/05/1986
• Issued: 04/11/1989
• Est. Priority Date: 09/05/1984
• Status: Expired due to Fees

• Current Assignee: Edmund R. Potsch
• Original Assignee: Edmund R. Potsch
• Inventors: Potsch, Edmund R.
• Primary Examiner(s): Lall, Parshotam S.
• Assistant Examiner(s): Mattson, Brian M.
• Application Number:
  US06/867,188
• Time in Patent Office: 1,072 Days
• Field of Search: 364/560, 364/561, 364/565, 364/566, 73/503, 73/505, 73/507, 73/509-511, 73/517 R, 73/518, 235/105, 235/95, 324/162, 324/163, 340/689, 340/669-672, 272/70, 377/23, 377/24, 377/24.1, 377/24.2
• US Class Current: 73/514.01
• CPC Class Codes: G01C 22/006 Pedometers
• CPC Class Codes: G01C 9/12 by using a single pendulum plumb lines G01C15/10
• CPC Class Codes: G01P 15/08 with conversion into electric or magnetic values
• CPC Class Codes: G01P 3/42 Devices characterised by the use of electric or magnetic means G01P3/66 takes precedence; measuring electric or magnetic values in general G01R

Abstract

With the apparatus of the invention, any acceleration/deceleration in the direction of movement is sensed by a pendulum. Electrical signals derived therefrom are used for solving the differential equation of oscillation of the pendulum for determining the acceleration, velocity and/or the distance covered by the moved body within a desired time period.

Claims

1. An apparatus for determining at least one characteristic value of movement (acceleration, velocity, distance covered) of a moving body comprising:

(a) a housing detachably mounted on said moving body independent of a vertical direction of attachment to said moving body;

(b) a sensor means arranged in said housing and including a pendulum suspended in said housing for free deflection about a horizontal axis in a direction opposite to a direction of movement of said moving body;

(c) a transducer means connected with said sensor means for generating electrical signals in response to any said deflection of said pendulum;

(d) a processing means for continuously receiving said electrical signals, for continuously solving a differential equation of oscillation of said pendulum based on said electrical signals and for continuously calculating said at least one characteristic value of movement; and

(e) a display means for displaying said at least one characteristic value of movement calculated by said processing means.

2. The apparatus of claim 1, wherein said transducer means includes an inductance means secured to said pendulum for rotation in a magnetic field upon any deflection of said pendulum for inducing a voltage, said magnetic field being generated in an air gap in which said inductance means is moveable and which is formed by a magnetic means circularly arranged about an axis of rotation of said inductance means, said induced voltage representing said deflection of said pendulum.

3. The apparatus of claim 2, wherein said pendulum is biased by a restoring spring means for returning said pendulum into a position in which said pendulum is maintained at a defined angle to a vertical axis in the absence of any acceleration/deceleration of said body.

4. The apparatus of claim 1 or 2, further comprising at least one further sensor means arranged to sense a movement in a direction different from that of said sensor means and arranged at a predetermined angle with respect thereto.

5. The apparatus of claim 4, wherein said at least one further sensor means comprises a further pendulum provided with a further inductance means for rotation with said further pendulum upon a deflection thereof and biased to a rest position at a predetermined angle with respect to the rest position of said pendulum by a spring means in an absence of any acceleration/deceleration acting upon said further pendulum.

6. The apparatus of claim 2, wherein said pendulum is provided with a dampening means.

7. The apparatus of claim 2 wherein said air gap has a varying width which is reduced in a direction of increasing deflection of said pendulum.

8. The apparatus of claim 1, wherein said processing means comprises:

a microprocessor connected to said transducer means for receiving said electrical signals, a program memory connected to said microprocessor for storing a program for solving said differential equation of oscillation, a clock generator connected to said microprocessor for generating a system clock and time reference signals, a RAM means connected to said microprocessor for storing digital values derived from said electrical signals received from said transducing means and processed in said microprocessor, intermediate results and said at least one characteristic value calculated by said microprocessor, and input means connected to said microprocessor for conditioning said microprocessor to execute portions of said program stored in said program memory.

9. The apparatus of claim 8, wherein said processing means further comprises an output means for outputting data stored in said RAM means for further processing thereof.

10. The apparatus of claim 1, wherein said housing has arranged at its top surface said display means for displaying said at least one characteristic value of movement and selecting means for setting said processing means to calculate one of said characteristic values of movement.

11. The apparatus of claim 1, wherein said transducer means are optical/electrical transducing means.

12. The apparatus of claim 1, wherein said transducing means are force responsive means.

13. The apparatus of claim 1, wherein said transducer means generate electrical signals in dependence on an angle α

of any deflection of said pendulum.

14. An apparatus for determining a change of angle of inclination of a moved body, comprising:

a housing attached to said body independent of a vertical direction of attachment;

a sensor means arranged in said housing and inlcuding a pendulum suspended in said housing for free deflection at least in one direction about a horizontal axis;

a transducer means for generating electrical signals in response to any deflection of said pendulum; and

a processing means for receiving said electrical signals and for solving a differential equation of oscillation of said pendulum based on said electrical signals and for calculating said change of angle of inclination of said moved body.

15. The apparatus of claim 14, wherein said processing means generates an output signal whenever said change in angle of inclination exceeds a predetermined value.

16. The apparatus of claim 14, wherein said procesisng means generates an output signal indicative of an amount of change of said angle of inclination.

17. The apparatus of claim 14, wherein said transducer means are optical/electrical transducing means.

18. The apparatus of claim 14, wherein said transducing means are force responsive means.

19. A method for determining at least one characteristic value of movement (acceleration, velocity and distance covered) of a body comprising the steps of:

(a) sensing from a beginning of the movement a deflection about a horizontal axis pendulum secured to said body independent of a vertical direction of attachment;

(b) generating electrical signals in resposne to any deflection of the pendulum;

(c) continuously solving a differential equation of oscillation of said pendulum based on said electrical signals;

(d) calculating said at least one characteristic value of movement based on a solution of said differential equation of oscillation of said pendulum; and

(e) selectively outputting said at least one characteristic value of movement.