Optical signal processing apparatus and decoding method for optical signal reception control device

• US 9,755,747 B2
• Filed: 02/13/2015
• Issued: 09/05/2017
• Est. Priority Date: 08/13/2012
• Status: Expired due to Fees

• Current Assignee: Kuang-Chi Intelligent Photonic Technology Ltd. (Kuang-Chi Technologies Co., Ltd.)
• Original Assignee: Kuang-Chi Intelligent Photonic Technology Ltd. (Kuang-Chi Technologies Co., Ltd.)
• Inventors: Liu, Ruopeng, Luan, Lin, Li, Chunlai, Liu, Min
• Primary Examiner(s): VANDERPUYE, KENNETH N
• Assistant Examiner(s): Sandhu, Amritbir
• Application Number:
  US14/621,402
• Publication Number:
  US 20150162984A1
• Time in Patent Office: 935 Days
• CPC Class Codes: G08C 23/04 using light waves, e.g. infrared
• CPC Class Codes: H04B 10/2575 Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier

Abstract

The present invention provides an optical signal processing device and a decoding method for an optical signal reception control device. The optical signal processing device includes one of the following: a power control apparatus, where the power control apparatus is configured to control power-on and power-off of a power supply according to an optical signal, or, a clock apparatus, where the clock apparatus is configured to store time of opening and closing a door; or, a charging apparatus, where the charging apparatus is configured to charge an optical signal transmitting apparatus. The present invention can control power-on and power-off of a power supply automatically and save electric energy effectively.

Claims

1. A optical signal processing device, wherein the optical signal processing device is an optical signal reception control device, and the optical signal reception control device comprises an optical signal receiving unit, a control unit connected to the optical signal receiving unit, a power supply unit connected to the control unit, and a photoelectric trigger circuit that is connected between the control unit and the power supply unit and configured to trigger power-on of the power supply unit of the optical signal reception control device, wherein the photoelectric trigger circuit is the power control apparatus, and the power supply is the power supply unit, and the photoelectric trigger circuit comprises:

an optical-to-electrical conversion unit, configured to convert a light pulse into an electrical pulse signal;

an isolator, configured to generate a potential difference by using the electrical pulse signal, and release an electrical signal;

an output end, configured to;

according to the electrical signal, trigger power-on of a power supply unit connected to the output end; and

a signal amplification circuit, connects the isolator and the output end, the signal amplification circuit comprises a first triode and a second triode connected to the first triode, wherein

the optical signal is the light pulse;

wherein the optical-to-electrical conversion unit is connected to one end of the isolator, and the other end of the isolator is connected to a base of the first triode, an emitter of the first triode is connected to a base of the second triode, both the emitter of the first triode and an emitter of the second triode are grounded, and a collector of the second triode is connected to the output end.

2. The optical signal processing device according to claim 1, wherein the isolator is connected between the optical-to-electrical conversion unit and the output end.

3. The optical signal processing device according to claim 1, wherein the isolator is a DC blocking capacitor.

4. The optical signal processing device according to claim 1, wherein the output end is a conductor.

5. The optical signal processing device according to claim 1, wherein when illuminance is greater than or equal to 100 Lux and lasts for 1 ms or more, the light pulse triggers power-on of the power supply unit of the optical signal reception control device.

6. The optical signal processing device according to claim 1, further comprising a demodulation unit configured to demodulate a visible optical signal.

7. A decoding method for an optical signal reception control device, applied to an optical signal reception control device according to any one of claim 1, wherein the method comprises the following steps:

M1. using a rising edge of a signal as a start part of a high level, starting, by a control unit of the optical signal reception control device, timing after detecting the rising edge, and when duration of the high level is greater than first preset duration, recording, by the control unit, the number of high levels;

M2. using a falling edge of a signal as a start part of a low level, starting, by the control unit of the optical signal reception control device, timing when detecting the falling edge, and when duration of the low level is greater than second preset duration, automatically recording, by the control unit, an end of a group of signals; and

M3. calculating, by the control unit of the optical signal reception control device, a period of each group of signals by using a synchronization clock, and identifying a low-level signal according to the period of each group of signals.

8. The decoding method for an optical signal reception control device according to claim 7, wherein when a high-level signal occurs in a first preset time segment after completion of a group of signals, the optical signal reception control device rectifies a clock according to time of the high-level signal, and records the high-level signal into a next group of signals automatically.

9. The decoding method for an optical signal reception control device according to claim 7, wherein when no high-level signal occurs in a second preset time segment after completion of a group of signals, the optical signal reception control device determines that a received signal is a low-level signal of a next group of signals.

10. The decoding method for an optical signal reception control device according to claim 7, wherein the decoding method is applicable to decoding of a stroboscopic visible optical signal emitted by an optical signal transmitting apparatus or a mobile phone.

11. The decoding method for an optical signal reception control device according to claim 7, wherein meanings represented by the number of high levels and low levels of each group of signals recorded by the optical signal reception control device are defined according to a coding scheme of the visible optical signal sent by the optical signal transmitting apparatus.

12. The decoding method for an optical signal reception control device according to claim 7, wherein when duration of the low-level signal is greater than third preset duration, receiving of the signal is complete or receiving of the signal is interrupted, and the control unit of the optical intelligent lock restarts detecting signals.

13. A optical signal processing device, wherein the optical signal processing device is an intelligent light-controlled door lock, wherein the intelligent light-controlled door lock comprises the power supply, a power control module, an optical signal receiving module, and a microprocessor module;

the power supply is configured to provide electric energy;

the power control module is the power control apparatus, and the power control module comprises a photodiode, a signal amplifier, and a field effect transistor;

the photodiode is configured to sense the optical signal and generate a current signal, the signal amplifier is configured to amplify the current signal, and the field effect transistor is configured to control power-on and power-off of the power supply according to the amplified current signal;

the optical signal receiving module is configured to convert an optical signal, which is transmitted by a light-controlled key and comprises ID information, into an electric signal; and

the microprocessor module is configured to control opening or closing of a door lock according to the electric signal;

wherein the intelligent light-controlled door lock further comprises an equilibrium shaping module, and the equilibrium shaping module is configured to eliminate intersymbol interference and rectify a pulse waveform for the signal output by the optical signal receiving module.

14. The optical signal processing device according to claim 13, wherein the intelligent light-controlled door lock further comprises a protocol conversion module, and the protocol conversion module is configured to perform protocol conversion for the ID, and then transmit the ID to a host computer.

15. The optical signal processing device according to claim 14, wherein the intelligent light-controlled door lock further comprises a signal demodulation module, and the signal demodulation module is configured to demodulate a signal output by the optical signal receiving module, and transmit the signal to the microprocessor module.

16. The optical signal processing device according to claim 15, wherein the intelligent light-controlled door lock further comprises a decoding module, and the decoding module is configured to decode a digital signal of a CMI code transmitted by the optical signal receiving module into a digital signal of an NRZ code.

17. The optical signal processing device according to claim 13, wherein the equilibrium shaping module comprises an operational amplifier and a comparer that are electrically connected to each other, wherein an input end of the operational amplifier and an input end of the comparer are both electrically connected to an output end of the optical signal receiving module, and an output end of the comparer is electrically connected to the decoding module.

18. The optical signal processing device according to claim 13, wherein the optical signal receiving module comprises a photodiode, a signal amplifier, and a bandpass filter, wherein the photodiode and the bandpass filter are both electrically connected to the signal amplifier.