APPLICATION SPECIFIC INTEGRATED CIRCUIT INCLUDING A MOTION DETECTION SYSTEM

• US 20120091219A1
• Filed: 10/15/2010
• Published: 04/19/2012
• Est. Priority Date: 10/15/2010
• Status: Active Grant

• Current Assignee: SC Johnson & Son Incorporated
• Original Assignee: SC Johnson & Son Incorporated
• Inventors: Sipinski, Gene, Bertomeu, Joel, Gavillero, Juan, Serrano-Gotarredona, Rafael
• Granted Patent: US 9,077,365 B2
• Time in Patent Office: Days
• US Class Current: 239/34
• CPC Class Codes: B05B 12/12 responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus B05B12/082, B05B12/084 take precedence
• CPC Class Codes: B05B 12/122 responsive to presence or shape of target B05B12/124 takes precedence
• CPC Class Codes: B05B 12/124 responsive to distance between spray apparatus and target
• CPC Class Codes: B65D 83/262 by clockwork, motor, electric or magnetic means operating without repeated human input
• CPC Class Codes: B65D 83/386 actuation occurring by moving the aerosol container relative to the outer shell or external container
• CPC Class Codes: H03M 1/181 in feedback mode, i.e. by determining the range to be selected from one or more previous digital output values

Abstract

An integrated circuit includes a detector having a detecting device that detects a proximity condition and develops a parameter of electric power related thereto and a parameter measuring device coupled to the detecting device. The parameter measuring device comprises a parameter detector, and an analog-to digital converter (ADC) coupled to the parameter detector and operative in one of a plurality of operational ranges to develop a digital representation of the parameter. The parameter measuring device further includes a range selector coupled between the ADC and the parameter detector that is operative to cause the parameter detector to develop an output signal magnitude representative of the parameter of electric power wherein the output signal magnitude is within one of the operational ranges of the ADC. The detector may be used in a control for a spray device to detect motion.

Claims

1. A detector, comprising:

a detecting device that detects a proximity condition and develops a parameter of electric power related thereto; and

a parameter measuring device coupled to the detecting device including;

a parameter detector,

an analog-to digital converter (ADC) coupled to the parameter detector and operative in one of a plurality of operational ranges to develop a digital representation of the parameter, and

a range selector coupled between the ADC and the parameter detector and operative to cause the parameter detector to develop an output signal magnitude representative of the parameter of electric power wherein the output signal magnitude is within one of the operational ranges of the ADC.

2. The detector of claim 1, wherein the ADC comprises a successive approximation register A/D converter (SARADC).

3. The detector of claim 2, further including a signal processing unit coupled to the SARADC wherein the signal processing unit develops a detector output signal.

4. The detector of claim 3, wherein the signal processing unit comprises a multiplier, a filter, a differentiator, and a comparator.

5. The detector of claim 4, wherein the signal processing unit further includes a divider coupled between the differentiator and the comparator.

6. The detector of claim 1, wherein the detecting device comprises a phototransistor and the parameter of electric power comprises a magnitude of emitter current of the phototransistor.

7. The detector of claim 6, wherein the parameter detector comprises a current mirror.

8. The detector of claim 7, wherein the current mirror develops an output signal representative of the magnitude of phototransistor current magnitude

9. The detector of claim 8, wherein the current mirror includes an input transistor coupled to the phototransistor, an anti-aliasing filter coupled to the input transistor, and an output transistor coupled between the anti-aliasing filter and the ADC and further including a switch coupled to a main current path electrode of the input transistor and to a main current path electrode of the output transistor and a range selector coupled between an output of the ADC and the switch for controlling the switch.

10. An integrated circuit operable in response to a sensed condition, comprising:

a motor controller;

a plurality of input terminals coupled to a source of power;

a plurality of output terminals for connection to a motor;

a motion detector for receiving a signal developed by a photosensitive device; and

means for operating the motor in one of a plurality of operating modes responsive to motion detected by the motion detector.

11. The integrated circuit of claim 10, further including means for illuminating an LED during operation in the one operating mode.

12. The integrated circuit of claim 11, wherein the photosensitive device develops a parameter of electric power and the motion detector comprises

a parameter detector, an analog-to digital converter (ADC) coupled to the parameter detector and operative in one of a plurality of operational ranges to develop a digital representation of the parameter, and a range selector coupled between the ADC and the parameter detector and operative to cause the parameter detector to develop an output signal magnitude representative of the parameter wherein the output signal magnitude is within one of the operational ranges of the ADC.

13. The integrated circuit of claim 12, wherein the ADC comprises a successive approximation register A/D converter (SARADC) and further including a signal processing unit coupled to the SARADC wherein the signal processing unit develops a detector output signal.

14. The integrated circuit of claim 13, wherein the signal processing unit comprises a multiplier, a filter coupled to the multiplier, a differentiator coupled to the filter, a divider coupled to the differentiator, and a comparator.

15. The integrated circuit of claim 12, in combination with a photosensitive device comprising a phototransistor and wherein the parameter of electric power comprises a magnitude of emitter current of the phototransistor.

16. A volatile dispensing device having a motor, a volatile material container, and an LED wherein the volatile dispensing device operates in response to elapsed time and sensed motion, comprising:

a source of power;

an application specific integrated circuit (ASIC) including;

a motor controller for supplying current to the motor,

a plurality of input terminals coupled to the source of power,

a plurality of output terminals coupled to the motor controller for connection to the motor,

a motion detector for receiving a signal developed by the photosensitive device, and

means for operating the motor and the LED in one of a plurality of operating modes responsive to motion detected by the motion detector; and

a photosensitive device coupled to the motion detector,

wherein the ASIC is responsive to the photosensitive device to detect motion.

17. The volatile dispensing device of claim 16, wherein the motor controller is operative to operate the motor in forward and reverse directions.

18. The volatile dispensing device of claim 17, wherein the photosensitive device develops a parameter of electric power and the motion detector comprises

a parameter detector, an analog-to digital converter (ADC) coupled to the parameter detector and operative in one of a plurality of operational ranges to develop a digital representation of the parameter, and a range selector coupled between the ADC and the parameter detector and operative to cause the parameter detector to develop an output signal magnitude representative of the parameter wherein the output signal magnitude is within one of the operational ranges of the ADC.

19. The volatile dispensing device of claim 18, wherein the ADC comprises a successive approximation register AID converter (SARADC) and further including a signal processing unit coupled to the SARADC wherein the signal processing unit develops a detector output signal.

20. The volatile dispensing device of claim 19, wherein the signal processing unit comprises a multiplier, a filter coupled to the multiplier, a differentiator coupled to the filter, a divider coupled to the differentiator, and a comparator, wherein the photosensitive device comprises a phototransistor and wherein the parameter of electric power comprises a magnitude of emitter current of the phototransistor.