Sensor data processing

• US 5,874,942 A
• Filed: 11/20/1995
• Issued: 02/23/1999
• Est. Priority Date: 04/02/1993
• Status: Expired due to Fees

• Current Assignee: Vir Systems Pty. Limited
• Original Assignee: Vir Systems Pty. Limited
• Inventors: Walker, Peter Joseph Michael
• Primary Examiner(s): Liang, Regina
• Application Number:
  US08/532,602
• Time in Patent Office: 1,191 Days
• Field of Search: 345/156, 345/157, 345/158, 345/161, 345/163, 345/168, 345/169
• US Class Current: 345/158
• CPC Class Codes: G06F 3/0346 with detection of the device orientation or free movement in a 3D space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors
• CPC Class Codes: G06F 3/038 Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry

Abstract

A method and system for processing data originating from, for example, a joystick type device using attitude sensing, are disclosed. The data is processed using a predefined instruction set, and the current and past states of various parameters, to enable image manipulation and other outputs which do not amount to a direct plotting of, say cartesian position data from an analog joystick. The inventive arrangement allows for virtual output states, temporal modulation of inputs, and enhanced functionality such as automatic power reduction, and autopilot functionality.

Claims

1. A method of processing sensor data produced by a sensing system, said sensor data having a plurality of possible values for each parameter sensed, at least one of said parameters being related to position, attitude or movement of an object,

characterised in that for at least one of said parameters related to position, attitude or movement of an object, said sensor data is processed according to a predetermined instruction set, said predetermined instruction set being also responsive to at least one of the group comprising previous values of said parameter, and current or previous values of other parameters, further responsive to pre-defined heuristic rules relating to the possible allowed values for a set of possible output data values relating to the desired output data

such that where rapid changes occur in said sensor data interpolated values between the sensor data are produced as output data in addition to the processed output data correlating to the sensor data.

2. A method according to claim 1, wherein said instruction set is adapted to forbid certain output values apparently defined by said sensor data having regard to the past values of said or other parameters.

3. A method according to claim 1, wherein said instruction set includes instructions relating to the characteristics of a system to which output data is transmitted.

4. A method according to claim 1, wherein said parameters include a given parameter which when set at a predefined value causes the output data for at least two other parameters to remain constant despite changes in the sensor data corresponding to those parameters.

5. A method according to claim 1, wherein if said sensor data does not alter for a predetermined period of time, said instruction set causes a reduction in power consumption in said sensing system.

6. A method according to claim 5, wherein said reduction occurs in a plurality of stages.

7. A method according to claim 5, wherein after one or more of the sensor outputs changes, said system returns to normal power consumption.

8. A method according to claim 1, wherein said predetermined instruction set may in response to the current and past states of one or more parameters pre-emptively produce one of said output values.

9. A method according to claim 1, wherein said sensor data comprises attitude data.

10. A method according to claim 9, wherein said sensor data is generated by conductive fluid switches.

11. A system for controlling a computing system, said system including at least one display means, first processing means controlling said display means, and a remote control device adapted to control at least some of the images displayed on said display means, said remote device including a sensing array adapted to produce sensor data corresponding to desired movements of an image on said display means,

said sensor data having a plurality of possible values for each parameter sensed, at least one of said parameters being related to position, attitude or movement of an object of the remote device or a part thereof,

characterised in that for at least one of said parameters related to position, attitude or movement of the remote device or a part thereof, said sensor data is processed according to a predetermined instruction set, said predetermined instruction set being also responsive to at least one of the group comprising previous values of said parameter, and current or previous values of other parameters, and being further responsive to pre-defined heuristic rules relating to the possible allowed values for a set of possible output data values relating to the desired output data,

such that where rapid changes occur in said sensor data, interpolated values of output data between the output data corresponding directly to said sensor data are produced in addition to the output data corresponding directly to said sensor data,

said output data being used by said processing means to control images on said display means.

12. A system according to claim 11, wherein said sensor data comprises attitude data.

13. A system according to claim 12, wherein said sensor data is generated by conductive fluid switches.

14. A system according to claim 11, wherein said instruction set includes instructions relating to the characteristics of the images displayed on said screen.

15. A system according to claim 11, wherein said instruction set is adapted to forbid certain output values apparently defined by said sensor data having regard to the past values of said or other parameters.

16. A system according to claim 11, wherein said parameters include a given parameter which when set at a predefined value causes the output data for at least two other parameters to remain constant despite changes in the sensor data corresponding to those parameters.

17. A system according to claim 16, wherein said parameter is an autopilot switch, and the output values defined effect the previous position of one or more images on said display means being maintained.

18. A system according to claim 11, wherein if said sensor data does not alter for a predetermined period of time, said instruction set causes a reduction in power consumption in said remote device.

19. A system according to claim 18, wherein said reduction occurs in a plurality of stages.

20. A system according to claim 18, wherein after one or more of the sensor outputs changes, said remote device returns to normal power consumption.

21. A system according to claim 11, wherein said predetermined instruction set may in response to the current and past states of one or more parameters pre-emptively produce one of said output values, so as to alter an image displayed on said display means.

22. A system according to claim 11, wherein said remote device communicates with said first processing means via a wireless connection.

23. A system according to claim 22, wherein and said instruction set encodes said output data for transmission via a link.

24. A system according to claim 23, wherein the link is optical or infra-red.

25. A system according to claim 24, wherein the data is encoded using a carrier-less, pulse position modulation system.