Intelligent Shutter Speech Control System Based on DSP

Based on TMS320F28035 DSP, this paper designed a smart shutters voice control system, which realized the functions of opening and closing shutters, intelligent switching of lighting mode and solar power supply through voice control. The traditional control mode is converted to voice control at the same time with automatic lighting and solar power supply function. In the convenience of people's lives at the same time more satisfied with today's people on the intelligent and environmental protection of the two concepts of the pursuit. The whole system is simple, low cost, safe and reliable.

2 System composition 2.1 target function (1) Through the voice to control the opening and closing shutters (2) When the outdoor light changes, the blinds will automatically adjust the current chase light mode, rotate the corresponding angle to achieve the desired effect (3) In the shading at the same time the largest use of resources, through the fan on the solar panels to the battery charge

System frame structure
Figure 1 shows that the DSP-based intelligent shutters voice control system consists of a battery charging module, a stepper motor drive module, a voice module, a photoresistor sampling module and a TMS320F28035 main control board.
(1) battery charging module: mainly for the entire system to provide power support.The voltage on the solar panel is converted to the required voltage to power the system.
(2) stepper motor drive module: the main system to provide dynamic support.
(3) voice module: the main responsibility for the entire system of information feedback.

Motor drive
The motor drive module is mainly for the entire system to provide power support, is to complete the motor action command executor.In order to ensure the use of shutters, we use the more precise step stepper motor as the drive motor, and ULN2003 chip composition shown below the motor drive circuit to drive, when the main control board to receive the signal will be implemented after the corresponding Action to ensure the realization of the various functions.
MATEC Web of Conferences 139, 00140 (2017) Mainly for the entire system to provide power support.To meet the needs we set the following two power supply.
(1) mains power supply: DC 5V power supply or with a 5V transformer to convert the mains of electricity to 5V DC power supply for the entire system.Mainly used when the battery is fully charged or the solar power supply system can not be used normally.
(2) solar power: solar energy supply and environmental protection, the principle is mainly the use of fan blades on the solar panels to collect solar energy, and then use the (2) external voice data stream, the voice recognition chip through the endpoint detection technology to detect the user to stop talking, and the user from the beginning to speak to stop the voice of the time period of the voice data analysis analysis gives the identification results.
The system designed in this paper is mainly used in voice control shutters, in the practical application of the main focus on voice recognition rate and real-time, so we use the second identification method.In order to better detect the recognition effect, we selected a number of different sound of the staff in the experimental environment several times to test.The results show that the average speech recognition rate is as high as 85% in the experimental environment.

Test of the operation of the blinds in different power supply modes
This experiment tested the effect of two different power supplies on the working condition of the blinds.
Experimental results show that, regardless of the type of power supply, the blinds can work properly and complete the instructions

Figure 4
Figure 4 Schematic diagram of stepper motor drive

Figure 5 Figure 6 1
Figure 5 CN3722 based on the battery charging circuit schematic We use the CN3722 is a can use the solar power supply PWM decompression mode charge management integrated circuit, with solar cell maximum power point tracking function.CN3722 is very suitable for single or

Figure 7
Figure 7 System program flow chart