Committed to promoting technological innovation and progress, the IEEE (Institute of Electrical and Electronics Engineers), the world's largest organization of scientific and technical professionals, recently invited a number of expert members to share the latest achievements in the field of robotics research. In these innovative projects, they combine a range of technologies with robots to design innovative robots for use in disaster relief, medical and biomechanical engineering.
Robot Lifeguard: Safer Drowning Savior
In the hot weather, people often swim and cool down, so summer is often a high incidence of drowning accidents. According to the International Life Federation, about 1.2 million people die every year from drowning. In order to better protect the safety of swimmers, IEEE Fellow, Dr. Robin Murphy, Director of the Robotic Assisted Search and Rescue Center of Texas A&M University, is working on a water-skiing robot that can be used for emergency rescue. EMILY (Emergency Integrated Life Saving Lanyard). The robot is a cylinder about 4 feet long that floats on the water and is remotely controlled by lifeguards. Rescue robot EMILY's "swim" speed is faster than any lifeguard, and can quickly reach the drowning person for rescue. At the same time, thanks to remote operation, EMILY can also search and rescue during flooding.
Rescue robot EMILY
According to Dr. Murphy, “The drowning people often struggle fiercely in the water, making it difficult for lifeguards to get close, and even threatening the personal safety of lifeguards. When designing the EMILY search and rescue mode, we specifically refer to the theory of spatial relations. This is a The Department of Psychology, which studies how people use space for communication, explores the impact of space on human behavior, communication, and social interaction. From this, we ensure that EMILY is rescued with more gentle behavior, allowing the drowning to allow the robot to approach, They are brought to safety."
Lightweight, low-energy mechanical bones: the gospel of people with reduced mobility
Research results of clutch devices based on electrosorption technology, IEEE member, Professor Steve Collins, biomechanical engineering at Carnegie Mellon University, USA, developed a mechanical exoskeleton that can help patients with disabilities or rehabilitation during their mobility. . This lightweight, low-energy, and highly flexible mechanic bone helps people with reduced mobility to do more simple daily tasks, such as lifting and moving heavier objects. This mechanical skeleton uses a clutch device for electrosorption technology, which is an upgraded version of the unpowered ankle exoskeleton that Professor Collins has previously developed. The unpowered ankle exoskeleton helps the wearer reduce energy consumption by 7% while walking.
Lightweight, low-energy mechanical bones
“When conceiving this electro-adhesive clutch, we focused on how to convert energy at low power,†Professor Collins shared. “In prosthetic and mechanical bone design, the most difficult thing is to develop A practical function that really helps the wearer. With electro-adsorption technology, we have successfully assembled hundreds of independently controlled thin, low-cost small clutches into a single mechanical skeleton, completely overturning the inherent mechanical system design. â€
The automatic biochemical analyzer is an instrument that measures a specific chemical composition in body fluids according to the principle of photoelectric colorimetry. Due to its fast measurement speed, high accuracy and small consumption of reagents, it has been widely used in hospitals, epidemic prevention stations and family planning service stations at all levels. The combined use can greatly improve the efficiency and benefits of routine biochemical testing.
principle
The automatic analyzer is to automatically run all or part of the steps of sampling, mixing, warm bath (37°C) detection, result calculation, judgment, display and printing results and cleaning in the original manual operation process. Today, biochemical tests are basically automated analysis, and there are fully automatic biochemical analysis systems designed for large or very large clinical laboratories and commercial laboratories, which can be arbitrarily configured according to the laboratory's testing volume.
Whether it is the fastest-running (9600Test/h) modular fully automatic biochemical analyzer today, or the original manual-operated photoelectric colorimeter for colorimetry, the principle is the use of absorption spectroscopy in spectroscopic technology. It is the most basic core of the biochemical instrument.
Optical system: is a key part of ACA. Older ACA systems used halogen tungsten lamps, lenses, color filters, and photocell assemblies. The optical part of the new ACA system has been greatly improved. ACA's beam splitting system can be divided into front splitting and rear splitting due to different light positions. The advanced optical components use a set of lenses between the light source and the cuvette to convert the original light source. The light projected by the lamp passes through the cuvette to bring the beam to the speed of light (unlike traditional wedge beams), so that the spot beam can pass through even the smallest cuvette. Compared with traditional methods, it can save reagent consumption by 40-60%. After the spot beam passes through the cuvette, the spot beam is restored to the original beam through this group of restoration lenses (wide difference correction system), and is divided into several fixed wavelengths (about 10 or more wavelengths) by the grating. The optical/digital signal direct conversion technology is used to directly convert the optical signal in the optical path into a digital signal. It completely eliminates the interference of electromagnetic waves to the signal and the attenuation in the process of signal transmission. At the same time, the optical fiber is used in the signal transmission process, so that the signal can achieve no attenuation, and the test accuracy is improved by nearly 100 times. The closed combination of the optical path system makes the optical path without any maintenance, and the light splitting is accurate and the service life is long.
Constant temperature system: Since the temperature of the biochemical reaction has a great influence on the reaction results, the sensitivity and accuracy of the constant temperature system directly affect the measurement results. The early biochemical instruments used the method of air bath, and later developed into a dry bath with constant temperature liquid circulation which combines the advantages of dry air bath and water bath. The principle is to design a constant temperature tank around the cuvette, and add a stable constant temperature liquid that is odorless, non-polluting, non-evaporating and non-deteriorating in the tank. The constant temperature liquid has a large capacity, good thermal stability and uniformity. The cuvette does not directly contact the constant temperature liquid, which overcomes the characteristics of the water bath type constant temperature being susceptible to pollution and the uneven and unstable air bath.
Sample reaction stirring technology and probe technology: The traditional reaction stirring technology adopts magnetic bead type and vortex stirring type. The current popular stirring technology is a stirring unit composed of multiple groups of stirring rods that imitate the manual cleaning process. When the first group of stirring rods is stirring the sample/reagent or mixed solution, the second group of stirring rods performs high-speed and high-efficiency cleaning at the same time. The set of stirring bars also undergoes a warm water washing and air drying process at the same time. In the design of a single stirring rod, a new type of spiral high-speed rotating stirring is adopted, and the rotation direction is opposite to the spiral direction, thereby increasing the stirring force, the stirred liquid does not foam, and reducing the scattering of light by microbubbles. Reagent and sample probes are based on the principle of early capacitive sensing, but slightly improved to increase the alarm of blood clots and protein clots, and re-test results according to the alarm level, reducing sample aspiration errors and improving the reliability of test results. . Large-scale biochemical instruments can detect more than 1,000 tests per hour, so automatic retesting is very important. Subjective evaluation of test results and manual retesting can no longer meet clinical needs.
Other aspects: barcode recognition of reagents and samples and computer login. Due to the lack of barcode recognition function of early biochemical instruments, there are more opportunities for errors. In recent years, both imported and domestic chemical instruments have adopted barcode detection. The use of this technology in biochemical instruments has provided technical support for the development of high-speed ACA, and also made the instrument quite supportive. The software development is simple and easy, therefore, barcode detection is the basis for the intelligence of the instrument. Open reagents, as an important factor for hospitals to choose models, whether the instrument supports open reagents is very important. After the reagents are opened, hospitals and scientific research units can choose their own reagent suppliers, and have a greater degree of freedom in measuring the price, the reliability of the test results, and the validity period of the reagents. Ion Selective Electrode Analysis Accessory (ISE), human serum and urine electrolyte indicators are very important, and hospitals can save money by adding ISE to the ACA system.
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