ACCELERATION RECORD READER

• US 3,582,632 A
• Filed: 07/18/1968
• Issued: 06/01/1971
• Est. Priority Date: 07/18/1968
• Status: Expired due to Term

• Current Assignee: Eoster Leigh Curtis
• Original Assignee: Eoster Leigh Curtis
• Inventors: EOSTER LEIGH CURTIS
• Application Number:
  US04/745,828
• Time in Patent Office: 1,048 Days
• US Class Current: 702/141
• CPC Class Codes: G01P 1/122 Speed recorders
• CPC Class Codes: G01P 7/00 Measuring speed by integrating acceleration measuring travelled distance by double integration of acceleration G01C21/16

Abstract

Three recording heads are spaced across a moving recording tape and all three are simultaneously fed a series of pulse-type signals. One of the heads is fixed, the second moves relative to the first in response to acceleration in an x-direction and the third moves similarly but in response to acceleration in a Ydirection. The apparatus is mounted in a vehicle, the tape thus storing information pertaining to its accelerations in coordinate directions and similarly with respect to the magnitude of its velocity. Readout apparatus used subsequently includes circuits to integrate the stored information and yield indications of velocity and displacement. Those indications permit the route taken by the vehicle to be plotted.

Claims

1. Acceleration responsive apparatus for indicating the selective prior movements of an object over a reference time period, comprising in combination:

a recording medium having a first track for recording signal information representative of a first series of reference conditions, and second and third tracks for recording signal information representative of acceleration changes along different axes of movement substantially perpendicular to one another, said last mentioned signal information differing from said first by differences in phase;

pickup means individually responsive to said recorded information in each of said tracks for developing separate signals representing each of said series of conditions;

first phase detector means for detecting phase differences between the signal representative of said reference conditions and the signal representative of said second series of conditions as indicative of acceleration changes along one axis of movement by said object;

second phase detector means for detecting phase differences between the signal representative of said reference conditions and the signal representative of said third series of conditions as indicative of acceleration changes along the other axis of movement by said object; and

means coupled to each of said first and second phase detector means for developing respective output control signals in response to said acceleration change signals, which output control signals are indicative of the selective displacements of said object along each of said axes of movement.

2. Acceleration responsive apparatus in accordance with claim 1 wherein said means coupled to each of said first and second phase detector means includes means for integrating the respective acceleration change signals to output control signals representing selective displacements of said object along said axes of movement and display means responsive to said last mentioned signals for plotting the actual movements said object has taken.

3. Acceleration responsive apparatus in accordance with claim 1 wherein further means are included comprising discriminator means coupled to said pickup means developing signal information representative of said first series of reference conditions, means coupled to said discriminator means for integrating said signal information to signals representing velocity of said object, and display means responsive to said velocity representative signals for plotting the total displacement of said object without regard to the direction of that displacement.