Measuring of Number-of-chewing using Flexible Capacitive Sensor

Chewing number is related to incremental increases in body weight from 20 years of age in Japanese middle‐aged adults

“…Mizuta et al. 14 verified the accuracy of this counter by asking individuals to count chewing numbers mentally while eating sample food and comparing these counts with those obtained by the device. All subjects in that study were young adults, and no other objective method, such as electromyography or videotaping, was used to evaluate accuracy.…”

“…The device does not count mouth opening and closing when the user speaks during meals, but counts the swellings of the temporal muscle, which do not occur while speaking. The reliability of the device for counting chewing number was evaluated by the Department of Mechanical Systems Engineering 14 . Chewing numbers counted by this device were highly correlated with numbers counted by observers.…”

“…We developed a device that determines the chewing number by sensing the stress of the temporal muscle and simultaneously measures chewing time (in seconds) 14 . The device consists of two parts: the main body with a liquid crystal display and a belt with a pressure sensor.…”

“…However, these are inapplicable for community-based studies because they are not portable and are difficult to apply to large numbers of subjects. A portable chewing counting machine for daily use was developed at Nagasaki University 14 . This counter was designed to be portable and comfortable for use while eating.…”

Vision-based displacement sensor for people with serious spinal cord injury

“…The chewing action signals detected are used to click the computer mouse. The principle of operation to detect chewing actions is based on the technique developed for the chewing counter [1]. However, optimizing and/ or customizing devices to match the remaining limited abilities of such patients is often difficult [2].…”