INERTIAL DEVICE WITH PEDOMETER FUNCTION AND PORTABLE ELECTRIC APPLIANCE INCORPORATING SAID INERTIAL DEVICE

• US 20150040668A1
• Filed: 10/22/2014
• Published: 02/12/2015
• Est. Priority Date: 01/30/2006
• Status: Active Grant

• Current Assignee: STMicroelectronics SRL (STMicroelectronics NV)
• Original Assignee: STMicroelectronics SRL (STMicroelectronics NV)
• Inventors: Pasolini, Fabio, Tronconi, Michele
• Granted Patent: US 10,006,931 B2
• Time in Patent Office: Days
• US Class Current: 73/514.32
• CPC Class Codes: G01C 22/006 Pedometers
• CPC Class Codes: G01P 15/125 by capacitive pick-up

Abstract

An inertial device that is integratable in a portable electronic device includes: an inertial sensor for generating at least one raw acceleration signal in response to accelerations caused by movements of walking and running of a user of the pedometer; and a processing unit, associated to the inertial sensor for counting a number of steps of the user of the pedometer on the basis of the raw acceleration signal. The inertial sensor and the processing unit are both encapsulated within a single package for integrated circuits, which can be coupled to a circuit board of an electronic device and is provided with at least one connection terminal for making the number of steps available to the outside world.

Claims

1. A method to generate a number of steps in a generic portable electronic appliance system, the generic portable electronic appliance system having one or more processors, memory, and a single integrated circuit package encapsulating both an inertial sensor and a processing unit associated with the inertial sensor, the method comprising:

generating at least one raw acceleration signal with the inertial sensor in response to accelerations produced when a user of the generic portable electronic appliance system walks; and

counting, with the processing unit, a number of steps of the user based on the raw acceleration signal.

2. The method of claim 1, wherein generating the at least one raw acceleration signal includes generating three raw acceleration signals, the three raw acceleration signals representing motion in three mutually perpendicular directions.

3. The method of claim 2, wherein the three raw acceleration signals are independent of each other.

4. The method of claim 2, wherein a first of the three raw acceleration signals represents acceleration along a first detection axis X, a second of the three raw acceleration signals represents acceleration along a second detection axis Y, and a third of the three raw acceleration signals represents acceleration along a third detection axis Z.

5. The method of claim 1, wherein generating the at least one raw acceleration signal comprises:

detecting a change in capacitance, the change in capacitance responsive to at least one force acting on the inertial sensor.

6. The method of claim 5, wherein the change in capacitance is caused by a movable part of the inertial sensor moving relative to a fixed part of the inertial sensor.

7. The method of claim 1, wherein generating the at least one raw acceleration signal comprises:

detecting motion with a biaxial linear accelerometer, the biaxial linear accelerometer having comb-fingered electrodes.

8. The method of claim 7, wherein generating the at least one raw acceleration signal comprises:

detecting motion with a single-axis accelerometer, the single-axis accelerometer having a hinged beam and a fixed body.

9. The method of claim 1, comprising:

cyclically coupling each raw acceleration signal of the at least one raw acceleration signal to a charge integrator;

passing a voltage signal from the charge integrator to an analog-to-digital converter circuit; and

detecting a plurality of step-events with a detection circuit, each step-event representing an identified step of the user.

10. The method of claim 1, comprising:

passing the number of steps to the one or more processors; and

presenting the number of steps to the user on a display coupled to the one or more processors.

11. A method to generate a number of steps in a cell phone, the cell phone having a processor, memory, an image sensor, a display, and a pedometer, the pedometer formed in a single integrated circuit package encapsulating both an inertial sensor and a processing unit associated with the inertial sensor, the method comprising:

generating a number of steps with the pedometer, each step of the number of steps generated in response to accelerations produced when a user of the cell phone walks, the number of steps generated absent any processing of the processor; and

passing the number of steps to the processor.

12. The method of claim 11, comprising:

presenting the number of steps to the outside world.

13. The method of claim 12, wherein presenting the number of steps to the outside world comprises:

communicating the number of steps via a receiving/transmitting circuit of the cell phone.

14. The method of claim 11, wherein passing the number of steps to the processor includes communicating the number of steps via a connection terminal coupling the pedometer to the processor.

15. The method of claim 11, comprising:

generating at least one of an estimated speed, a total distance covered, and an estimated energy consumption based on the number of steps.

16. The method of claim 11, comprising:

activating the pedometer by the processor.

21. The generic portable electronic appliance device of claim 16, includes generic portable electronic appliance device is a cell phone.

17. A generic portable electronic appliance device, comprising:

at least one processor;

memory coupled to the at least one processor; and

a single integrated circuit package pedometer encapsulating both an inertial sensor and a processing unit associated with the inertial sensor, the processing unit coupled to the at least one processor via a communication interface arranged to pass a number of steps taken by a user associated with the generic portable electronic appliance device.

18. The generic portable electronic appliance device of claim 17, wherein the generic portable electronic appliance device is a cell phone.

19. The generic portable electronic appliance device of claim 17, comprising:

a display;

a receiving/transmitting circuit; and

an image sensor, wherein each of the display, the receiving/transmitting circuit, and the image sensor are coupled to the at least one processor.

20. The generic portable electronic appliance device of claim 17, wherein the communication interface comprises:

a connection terminal.