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 ICACT20210218 Slide.01
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Good morning, chairman, ladies, and gentlemen, We are going to talk about "Wireless voice-controlled mobile electric heater". The authors are YuXin Li, JinPeng Chen, Bing-Yuh Lu, Xin Li, CanJie Yao, LinShu Zheng, Xin Bai, and WanQin Jiang. All authors are with Guangdong University of Petrochemical Technology (GDUPT), MaoMing City, Guangdong, China |
| ICACT20210218 Slide.02
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This study presents a voice-controlled movable electrical heating radiator. The functions are
1.Button or voice-controlled the radiator by smartphone APP;
2.Heat radiation power control, moving control, and timing control;
3.Feedback artificial synthesis voice for instruction, temperature feedback, and ultrasonic sensing for anti-collision.
The results show the success rates are over 90% for most of the cases. A better performance and lower cost voice-controlled movable electrical heating radiator has been implemented. The convenience of the radiator elevates the quality of human living life.
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| ICACT20210218 Slide.03
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There are 5 parts in this presentation. They are introduction, methods, results, discussion and conclusion. |
| ICACT20210218 Slide.04
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Introduction |
| ICACT20210218 Slide.05
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Background
Nowadays, the product with artificial intelligence (AI) is very popular in daily life, because the AI technology brings convenience to human. For example, the application of face recognition can replace the keys of the doors, so some persons feel easier and comfortable in the pockets or bags. Some smart robots are designed for smart live in houses, therefore, some persons reduce the trivial housings to make life easy which is one of the purposes of many studies relative to AI.
The basis
A system named “little sun” is a combination of Arduino UNO and LD3321 modules. The four-channel relay switch module was connected with pins of Arduino UNO and embedded under the cover of a base set of the heater. Three commands, namely “Higher temperature,” “Lower temperature,” and “Stop,” were programmed. The voice commands were arranged to sound randomly to ensure comprehensive testing. The SNR of the command voice in a peaceful home is typically more than 10 dB. In 82 tests, the proposed device successfully recognized 80 voice commands at the first command. Thus, the success rate (SR) was 98%.
This study based on the prototype of “little sun” improved the functions which include
(1) button or voice-controlled the radiator by smartphone APP;
(2) heat radiation power control, moving control and timing control; and
(3) feedback artificial synthesis voice for instruction, temperature feedback, and ultrasonic sensing for anti-collision. The improve the system is named as “sun magician”.
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| ICACT20210218 Slide.06
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Methods
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| ICACT20210218 Slide.07
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Micro controller
The main micro controller is STM32 which has the specification of high-speed embedded memories, DMA and an extensive range of system functions, enhanced I/Os and peripherals. The devices offer standard communication interfaces, one 12-bit ADC with up to 19 channels, a low-power RTC, an advanced control PWM timer, five general-purpose 16-bit timers, two basic timers .
Motor drive module
2 tank-type tracked wheels with the motor drive module were employed for the movable carrier of the electric heating radiator. The carrier was controlled by the IO port of STM32 G0. The key chip of motor drive module was L298N,and the maximum output power is 25W. The speeds of the wheels were tuned by pulse width modulation (PWM) technology where the duty cycles of the driving pulses were modulated by timers.
HC-06 Bluetooth module
The serial port 1 serves as a data channel and connect the HC-06 Bluetooth module through the serial port pins. The baud rate is 9600 in the slave mode.
Timer for radiating
The function of the timer for radiating has implemented. For example, the users can set the timer when they go out in advance. When they back home, the pre-warm function will make them comfortable. The function was implemented by embedded basic Timer 7 of STM32 G0. STM32 timers are divided into 3 categories, including advanced timers, general timers and basic timers.
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| ICACT20210218 Slide.08
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DS18B20 temperature sensor module
DS18B20 temperature sensor module is a wide temperature measuring range with high accuracy. The sensing range of DS18B20 is -55 °C to +125 °C. The accuracy is ±0.5 °C in the temperature range of -10 to +85 °C. The temperature sensor detects the temperature in front of the electric heating radiator to keep the temperature of the air and avoid the incidents of overheating. The temperature data can be called by the query command from the smartphone.
APP and Bidu voice recognition cloud system
Voice function are connected with the multiple api interfaces such as Baidu voice recognition cloud. The cloud was waked up and synthesized the voice signals. Therefore, a stable and accurate function of voice recognition is realized. There are two modes to control the microcontroller in the APP. One is manual, the other is voice controlled.
Active buzzer and HC-SR04 ultrasonic module
HC-SR04 ultrasonic ranging module can measure 2cm-400cm distance sensing function with 3mm accuracy. The function of anti-collision keeps 30 cm distance named safety range between carrier and obstruct. If the sensing distance is less than the safety range, buzzer sounds for warming and carrier stops for avoiding to collision.
Power
The electrical power of all the system is input into 220 V (ac) then the transformer and voltage converters supply +12 V (dc) and 5V(dc). +12 V (dc) is the power source of the carrier. +5 V (dc) is the power supply of the digital system which includes the microcontroller.
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| ICACT20210218 Slide.09
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Results |
| ICACT20210218 Slide.10
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APP
The display of APP is shown in Fig. These buttons are for the manual mode operation. The voice mode operation accepts the voice commands to control the “sun magician”. Firstly, the Bluetooth modules should be paired between smart phone and carrier. Finished the pairing, the voice mode can be done by clicking the voice button.
System integration
Under the cover of the electric heating radiator, the microcontroller connected with motor drive module for the movable carrier, timer for radiating, and active buzzer.HC-SR04 ultrasonic ranger was appended on the cover for anti-collision and DS18B20 temperature sensor module was in front of the radiator to sense the air temperature near the radiator and control the power of electric heating radiator.
Tests
For the manual mode operation, the corrective rates were almost 100%. Whereas, the voice controlled mode operation, all the commands (“Lower temperature”, “Higher temperature” and “Constant temperature”, “Forward”, “Backward”, “Turn right”, “Turn left”, “Close” and “Stop” ) have been test for 100 times. The corrective rates were near 90%.
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| ICACT20210218 Slide.11
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Let's watch the video to touch the "sun magician"! |
| ICACT20210218 Slide.12
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Discussion |
| ICACT20210218 Slide.13
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APP
The display of APP is shown in Fig. These buttons are for the manual mode operation. The voice mode operation accepts the voice commands to control the “sun magician”. Firstly, the Bluetooth modules should be paired between smart phone and carrier. Finished the pairing, the voice mode can be done by clicking the voice button.
System integration
Under the cover of the electric heating radiator, the microcontroller connected with motor drive module for the movable carrier, timer for radiating, and active buzzer.HC-SR04 ultrasonic ranger was appended on the cover for anti-collision and DS18B20 temperature sensor module was in front of the radiator to sense the air temperature near the radiator and control the power of electric heating radiator.
Tests
For the manual mode operation, the corrective rates were almost 100%. Whereas, the voice controlled mode operation, all the commands (“Lower temperature”, “Higher temperature” and “Constant temperature”, “Forward”, “Backward”, “Turn right”, “Turn left”, “Close” and “Stop” ) have been test for 100 times. The corrective rates were near 90%.
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| ICACT20210218 Slide.14
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Finally, we have the conclusion.
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| ICACT20210218 Slide.15
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Based on the previous study, we improved the function of the electrical heating radiator. We believe that “sun magician” can function as a server for health care. Further study will enhance interactive function of the radiator. |
| ICACT20210218 Slide.16
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Thank you! |
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