The digital home is the basic unit of the future intelligent community system. The so-called "digital home" is based on the home to provide intelligent services covering the entire home, including data communication, home entertainment and information appliance control functions. One of the main elements of digital home design is the realization of communication functions, including communication between the home and the outside world and communication between related facilities within the home. From the point of view of the current development, the external communication is mainly through broadband access. intenet, while the communication within the family, I use the current more competitive Bluetooth (bluetootlh) wireless access technology. The traditional digital home uses pc for overall control, which lacks humanization. The author according to the idea of artificial emotion to design a kind of intelligent robot equipped with a variety of external sensors, this intelligent robot is regarded as a family member, through which the control of the digital home is realized. This paper focuses on modeling the application of intelligent robots in digital home healthcare, and Bluetooth technology is used in the communication between the intelligent robot and medical instruments and control pc. The cost of the whole system is low, the function is more comprehensive, the extended application is very broad, and it has great market potential.2 Overall Design of Intelligent Robot 2.1 Multi-sensor System of Intelligent Robot The most important related field in robotic intelligent technology is the multi-sensory system of robots and the integration and fusion of multi-sensing information [1], collectively referred to as the hardware and software part of the intelligent system. The fusion of external sensors such as vision, hearing, force, touch, etc. and the internal sensor information of each joint of the robot can enable the robot to accomplish important functions such as real-time image transmission, voice recognition, scene identification, localization, automatic obstacle avoidance, target detection, etc.; adding relevant medical modules (ccd, camera, stereo microphone, image acquisition card, etc.) and specialized medical sensor components to the robot, and then adding a medical expert system can realize medical care. Together with the medical expert system, it can realize healthcare and remote medical monitoring functions. The block diagram of the multi-sensor system of the intelligent robot is shown in Figure 1. 2.2 Intelligent robot control system The robot control system contains 2 parts: one is the upper computer, generally using pc, which completes the robot's motion trajectory planning, sensor information fusion control algorithms, vision processing, human-computer interface and remote processing and other tasks; the second is the lower computer, generally using multi-single-chip system or dsp and so on as the core components of the controller, to complete the motor servo control, feedback processing, image processing, voice recognition and communication interface and other functions. If a multi-microcontroller system is used as the lower unit, each processor completes a single task, and the overall system functions are accomplished through information exchange and mutual coordination, but it is obviously lacking in signal processing capability. Since dsp is good at signal processing, and signal processing, image processing and speech recognition are often needed for this intelligent robot, dsp is used as the controller of the intelligent robot control system [2]. Control system to dsp (tms320c54x) as the core component, by bluetooth wireless communication, gsm wireless communication (support gprs), motor drive, digital compass, sensory function sensors (visual and auditory, etc.), medical sensors and multi-selective serial communication (rs-232) module, etc., the control system block diagram is shown in figure 2. (1) The system controls the motion of the robot through drive motors and steering motors, and the steering motors utilize the information from the digital compass as a feedback quantity for pid control. (2) The rokl01007 circuit from Ericsson (ericsson) is used as the Bluetooth wireless communication module to realize the communication between the intelligent robot and the upper computer pc and the communication with other healthcare instruments based on the Bluetooth module. (3) The gprs-enabled gsm wireless communication module supports data, voice, short message and fax services, and uses cellular communication to communicate with the remote medical monitoring center. (4) As tms320c54x has only 1 serial port, and bluetooth module, gsm wireless module, digital compass and visual auditory and other sensory functions sensor module are using rs a 232 asynchronous serial communication, so it must be designed to a multi-selective serial port communication module for conversion processing. When tms320c54x need bluetooth wireless communication module data through the circuit select through; when t~ms320c54x need a sensor module data, shut down the last wireless communication module select through, at the same time select through the sensor module. In this way, each module completes the serial communication with 1~ms320c54x.3 Implementation of Main Healthcare Functions Intelligent robots can provide the following services for the healthcare of digitalized families: (1) Medical Monitoring The main physiological parameters of family members such as cardiovascular, blood pressure, temperature, respiration and oxygen saturation are detected in real time by the medical sensors integrated with the Bluetooth module, and local results are provided through the robot's processing system to provide local results. (2) Remote diagnosis and consultation Through the robot's vision and hearing and other sensory functions, the collected video, audio and other data combined with the data of various physiological parameters are transmitted to the telemedicine center, which is monitored remotely by the experts in the medical center, and combined with the medical expert system for consultation on the health of family members, i.e., to provide the services of looking (video), smelling, questioning (audio) and cutting (various physiological parameters) [3]. 3.1 Robot Vision and Video Signal Transmission The video signal captured by the robot serves 2 purposes: to provide robot vision; and to transmit the captured still images and motion pictures of family members to the telemedicine center. The role of robotic vision is to obtain the required information from a 3-dimensional image of the environment and construct a clear and meaningful description of the environmental objects. Vision consists of 3 processes: (1) Image acquisition. A 3-dimensional environmental image is converted into an electrical signal by a visual sensor (ccd camera for stereo images). (2) Image processing. Image-to-image transformations such as feature extraction. (3) Image understanding. Giving a description of the environment based on processing. Through the transmission of video signals, doctors at the telemedicine center can understand the physical condition and mental state of family members in real time. The intelligent robot captures images suitable for healthcare and diagnostic needs according to the doctor's needs, and selectively transmits high-resolution and low-resolution images. In the process of healthcare, there are 2 different conditions for the transmission of images: (1) When the doctor observes the color of the family member's skin, lips, tongue, nails, and facial expression, he/she needs to transmit static high-resolution color images; the method used is to transmit 1 high-resolution static image at intervals (e.g., 5 minutes). (2) When a doctor views the physical mobility of a family member with the aid of a moving picture, images of lower resolution and smaller size can be transmitted; the method used is to carry out reasonable compression and recovery to ensure real-time. 3.2 Robot Hearing and Audio Signal Transmission The audio signal captured by the robot also serves two purposes: one is to provide the robot with hearing; the other is that with the help of the audio signal, the family members can communicate with the doctor, and the doctor can understand the family members' health status and state of mind. The transmission of audio signals provides a means of verbal communication for doctors to provide healthcare to family members. Robotic hearing is speech recognition technology, healthcare intelligent robots with various acoustic interaction systems are capable of performing medical tests and monitoring as per the commands of the family members, as well as doing household chores, controlling digital home appliances, and taking care of patients as per the commands of the family members. Sound is acquired using multiple stereo microphones. Since the frequency range of sound is about 300hz a 3400hz, too high or too low frequency sound in general is not required to transmit, so only use the transmission of the frequency range of 1000hz-3000hz sound, the doctor and the family members can carry on the normal communication, so as to reduce the transmission of audio signals occupied by the bandwidth, and then the use of appropriate communication audio compression protocols to Meet the requirements of real-time audio. The hearing system of the intelligent robot is shown in Figure 3. 3.3 Acquisition and Transmission of Physiological Information The traditional detection equipment is connected to the human body through wired means for the acquisition of physiological information, and the various connections tend to make the patient nervous, which leads to inaccurate data detected. The use of Bluetooth technology can be a good solution to this problem, medical micro-sensors with Bluetooth modules are placed in the body of family members, as far as possible, so that they do not interfere with the normal activities of the human body, and then through Bluetooth technology, the collected data are transmitted to the receiving device and processed. One detector with Bluetooth module is installed on the intelligent robot as the receiving device, and various medical sensors transmit the collected physiological information data to the detector through Bluetooth module, and the detector has 2 ways of working: one is to give the data to the intelligent robot for processing and provide local results; the other is to connect with the INTERNET (or it can be sent back directly through the gsm wireless module), and by transmitting the data to the telemedicine center for the purpose of healthcare and remote monitoring. Video and audio data transmission is also used in this way. The data transmission system of the intelligent robot is shown in Fig. 4. 4 Application of Bluetooth Module 4.1 Bluetooth Technology Overview Bluetooth technology [4] is a short-range wireless communication technology used as an alternative to cables or connecting wires. Its carrier selection of the global public 2.4ghz (the actual RF channel for f = 2402 k × 1mhz, k = 0, 1, 2, ..., 78)ism band, and the use of frequency hopping to expand the band, frequency hopping rate of 1600 hops / s. Can get 79 1mhz bandwidth channel. Bluetooth device using gfsk modulation technology, the communication rate of 1mbit/s, the actual effective rate up to 721kbit/s, the communication distance of 10m, the transmit power of 1mw; when the transmit power of 100mw, the communication distance of up to 100m, can meet the needs of the digital family. 4.2 Bluetooth Module The rokl01007 Bluetooth module [5] is a wireless baseband module suitable for short-range communication introduced by Ericsson. It has a high degree of integration, low power consumption (RF power of 1mw), supports all Bluetooth protocols, and can be embedded in any device that requires Bluetooth functionality. The module includes baseband controller, wireless transceiver, flash memory, power management module and clock 5 functional modules, can provide high to hci (host control interface) layer of functions. The structure of a single Bluetooth module is shown in Figure 5. 4.3 Master, Slave Device Hardware Composition Bluetooth technology supports point-to-point ppp (point-t0-point pro-tocol) and point-to-multipoint communication, wirelessly connecting a number of Bluetooth devices into a micro-micro-network [6]. Each micro-micro network consists of 1 master device (master) and several slave devices (slave), with a maximum of 7 slave devices. The master device is responsible for the action of the communication protocol, and the mac address is represented by 3 bits, i.e., 8 devices can be addressed within 1 micro-micro network (the number of interconnected devices is practically unlimited, except that only 8 can be activated at the same moment, of which 1 is the master and 7 are slaves). The slave devices are controlled by the master device. The same frequency hopping sequence is used for all device units. A miniature medical sensor with a Bluetooth module is used as a slave device, and a detector with a Bluetooth module on a smart robot is used as a master device. The hardware of the master and slave devices mainly includes antenna unit, power amplifier module, Bluetooth module, embedded microprocessor system, interface circuit and some auxiliary circuits. The master device is the core part of the whole Bluetooth, to complete a variety of different communication protocols between the conversion and information **** enjoyment, as well as with the external communication between the data exchange function, but also responsible for the management and control of the various slave devices. 5 Conclusion With the progress of society, economic development and the improvement of people's living standards, more and more people need home health care services. The intelligent robot system applied to digital home health care services proposed in this paper is more comprehensive in function, and has a great market potential for expanding applications in household intelligent robots, Bluetooth technology-based smart homes and digital hospitals. More papers please go to the secretarial miscellany network
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