Circuit design of speech recognition robot system

Single chip microcomputer STM32L151CCU6

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM

Photocoupler

At present, industrial robots have considerable market potential in the manufacturing market. To make industrial robots truly applied to all aspects of the production line and meet the growing needs of people, high-performance speech recognition control systems are indispensable. With the rapid development of computer hardware and software technology, semiconductor technology, electronic technology, communication technology, etc., humans have entered the post-PC era. Speech recognition technology has developed rapidly, and various products supporting speech recognition have appeared. Humans have realized the use of voice commands to control the use of air conditioners, televisions, lights, and automatic curtains, so that people's lives are more comfortable and more convenient. Based on Sunplus 16-bit SPCE061A microcontroller, a robot with speech recognition function was designed. After training, the robot responds to the commander's command and completes two dances, walking, steering, turning, and launching the Frisbee.

Speech recognition can be divided into two processes of training and recognition. In the first stage, the speech recognition system learns the human language and stores the learning content into a speech inventory. In the second stage, the currently input speech can be searched for the corresponding meaning or semantics in the speech library. Sunplus 16-bit SPCE061A microcontroller embedded 32K word flash memory, 2K word SRAM, built-in 10-bit ADC, DAC, with up to 14 interrupt sources. Its CPU core uses a 16-bit DSP-capable microprocessor chip, and the CPU can operate at a maximum frequency of 49MHz, which can process complex digital signals very easily and quickly, so compared with other types of microcontrollers. SPCE061A has advantages in digital voice processing. Based on SPCE061A, a robot with speech recognition function was designed. After training, trainers can use a variety of commands to let the robot complete many interesting actions, making human-computer interaction more intelligent.

SPCE061A minimum system

SPCE061A minimum system, including the basic module of the SPCE061A chip peripheral, which is mainly composed of crystal input module (OSC), phase-locked loop peripheral circuit (PLL), reset circuit (RESET), indicator light (LED), etc., see Figure 4 1. Connect the crystal oscillator and resonant capacitor to the OSC32O and OSC32I ports, and connect the corresponding capacitor and resistor to the VCOIN port to work. The other unused VDD port and GND port should not be suspended. A 0.1uF coupling capacitor should be connected to improve the anti-interference ability. Figure 4-1 SPCE061A minimum system.

Clock circuit design

Clocks, real-time clock delays, and other time-related products used in everyday life are 32768Hz real-time clocks. In the SPCE061A clock circuit, a crystal oscillator is used. The external crystal with a frequency of 32768Hz is used. The wiring diagram of the SPCE061A clock circuit can be seen in the figure.

Phase-locked loop circuit design

The Phase Lock Loop is a system clock Fosc reference that multiplies the 32768 Hz real-time clock (RTC) to 49.152 MHz, 40.96 MHz, 32.768 MHz, 24.576 MHz, or 20.480 MHz.
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