"Chinese Medicine Divine Finger" and the overall design of its Bluetooth terminal
The "Chinese Medicine Divine Finger" product is a combination of Chinese medicine music therapy and massage therapy. It uses advanced microelectronic technology to transmit music selected by music therapy through a Bluetooth wireless transmitter. The Bluetooth terminal is a portable device designed based on PowerWise technology and has high efficiency. Energy-saving features, through the synchronized action of sound and colored audio and massage motors placed on specific acupuncture points, to achieve the purpose of dredging meridians and rehabilitating the body and mind, the "Chinese medicine god finger" product effectively integrates fashion, health, technology and other fashion elements.
The "Chinese medicine god finger" product is mainly composed of the main control software Magic finger, Bluetooth wireless transmitter, and Bluetooth terminal. The main control software Magic finger interface is shown in Figure 1, including Bluetooth connection, recording guidance, massage relaxation, and playback Guidance and other buttons. The Bluetooth connection controls the Bluetooth adapter and the Bluetooth module on the finger to connect and pair, and the recording guidance is used to record the doctor's guidance advice and save it into a corresponding audio file, which is convenient for Bluetooth transmission. Play the guidance to call and record the doctor's guidance. It is recommended to perform corresponding medical actions on the user, massage and relax, choose the relaxing and soft music specified by the doctor, and give the user music therapy.
Figure 1 Magic finger interface
The working frequency band of the Bluetooth wireless transmitter is the 2.4GHz industrial, scientific, and medical (ISM) frequency band that is uniformly and globally open, and is plugged into the USB socket, as shown in FIG. 2.
Figure 2 Bluetooth wireless transmitter
The prototype of "Chinese Medicine God Finger" Bluetooth terminal is shown in Fig. 3, which is composed of control module, Bluetooth module, audio module, indicator module and motor control module. The control module is responsible for the configuration, control and background music playback of other modules; the Bluetooth module mainly completes the reception of audio data; the audio module amplifies and plays the sound audio; the motor drive module controls the motor; the indicator module controls the indicator.
Figure 3 Prototype of "Chinese Medicine Finger" Bluetooth Terminal
Bluetooth terminal functional unit based on PowerWise technology
Energy efficiency is a key factor related to the success or failure of system design. According to the system architecture, all factors are weighed among the four important indicators of performance, function, size and power consumption to ensure that the power consumption of each unit can exert the highest performance . Therefore, high-performance components are particularly important. National Semiconductor's PowerWise series of products currently has more than 300 integrated circuits, all of which are energy-efficient chips, which help improve system energy efficiency, achieve low power consumption, strong heat dissipation, small size and longer battery life. The "Chinese Medicine God Finger" Bluetooth terminal is a portable device designed based on PowerWise technology. It uses National Semiconductor's PowerWise series LM49370, LM4570, LM4675 and LP3952 devices, which has the characteristics of high efficiency and energy saving. Its structural block diagram is shown in Figure 4.
Figure 4 "Chinese medicine god finger" Bluetooth terminal block diagram
The audio power amplifier uses the PowerWise series product LM49370, which belongs to the audio subsystem of the Boomer audio power amplifier series. It is characterized by spread spectrum technology, so the electromagnetic interference is extremely low, and the built-in class D speaker amplifier, dual mode stereo headphone amplifier and Bluetooth support The dedicated interface of the transceiver, its internal block diagram shown in Figure 5
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Figure 5 Internal block diagram of the audio power amplifier chip LM49370
Stereo speaker adopts PowerWise series product LM4675, a 2.65W mono class D audio power amplifier, which is characterized by spread spectrum technology, so the electromagnetic interference is extremely low, no need to add a filter, its internal block diagram is shown in Figure 6
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Figure 6 Internal block diagram of stereo speaker chip LM4675
For portable products, system power consumption is one of the first issues that manufacturers need to pay attention to. The "Chinese medicine god finger" Bluetooth terminal is designed based on PowerWise technology and uses the adaptive voltage regulation (AVS) and threshold voltage regulation of the PowerWise series of products. The operation and leakage power consumption of digital logic integrated circuits are automatically minimized, while keeping system overhead to a minimum. The Bluetooth terminal adjusts its power supply according to the actual working needs of its independent processing unit to reduce power consumption.
in conclusion
The "Chinese Medicine Divine Finger" design combines traditional Chinese medicine music therapy and massage therapy, and provides health functions such as dredging meridians, healing body and mind, etc. Due to the use of PowerWise devices in their Bluetooth terminals, these PowerWise devices are built with multiple independently operated processing units. Sometimes these units all work at full speed, but sometimes some of the functions will be idle or turned off. Since the power supply of each unit can be independently managed, the system power consumption is optimized.
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