Wang W.-K.,SEDA Chemical Products Co. |
Chen C.-H.,SEDA Chemical Products Co. |
Huang W.-C.,SEDA Chemical Products Co. |
Su R.-H.,SEDA Chemical Products Co. |
Liu Y.-W.,SEDA Chemical Products Co.
Gerontechnology | Year: 2014
Purpose: Obstructive Sleep Apnea Syndrome (OSAS) may lead to daytime lethargy. More severe OSAS may decrease memory and attention, and may even cause death due to hypoxia. Currently, obstructive sleep apnea affects 4-5% of the general population, and often occurs in obese and elderly adults1,2. To our knowledge, the majority of products currently on the market can only detect snoring by microphone sensor. However, similar methods are ineffective for OSAS, as the condition is soundless. OSAS monitoring devices typically monitor chest movement as a result of breathing for signs of faintness; however, these monitors are uncomfortable and may affect sleep quality. This paper presents the development of an OSAS detection mattress, WhizMattress, which allows for the detection of OSAS events without wearable sensors. Method: Ultra-Wide Band (UWB) technology can detect slight movement without contact. The detection process also does not affect human health. Note that the electromagnetic wave of UWB is lower than the 1 ppm of typical cell phones. Furthermore, UWB can pass through liquid and solid states. Therefore, we inserted a UWB sensor into a memory foam mattress (IMAGER-37). The detection area is between the user's chest and abdomen. If movement in this area becomes faint, an OSAS event is recognized. Figure 1 shows the pattern of breathing in the Labview system. From Figure 1, breathing becomes smoother when OSAS occurs. In order to determine the accuracy of WhizMattress, a comparative clinical test between WhizMattress and Polysomnography (PSG) was implemented. A healthy adult (40-year-old male, overweight with a BMI of 26.4) was recruited for sleep data collection. The subject wore a PSG sensor and lay on the WhizMattress for 423.1 min (Figure 2). Thirty six OSAS events were detected by both devices, and 37 by PSG alone. Therefore, the sensitivity of the WhizMattress (i.e., the probability of WhizMattress and PSG judge OSAS event under PSG judge OSAS event) is 36/74 = 49.3%. Note that the subject sometimes laid on the non-detection area. In these cases, the breathing was undetected. Results & Discussion: WhizMattress not only can detect OSAS without wearable sensors, but also can provide a sleep quality evaluation in home healthcare. In future work, more comparative experiments will be performed for verifying the mattress' accuracy.
Su R.-H.,SEDA Chemical Products Company Ltd |
Hsu Y.-L.,Yuan Ze University |
Chan L.,Shuang Ho Hospital |
Lin H.,Yuan Ze University |
Yang C.-C.,Industrial Technology Research Institute of Taiwan
Biomedical Engineering - Applications, Basis and Communications | Year: 2014
Accelerometers have been widely used in wearable systems for gait analysis. Several gait cycle parameters are provided to quantify the level of gait regularity and symmetry. This study attempts to assess abnormal gaits of Parkinson disease (PD) patients based on the gait cycle parameters derived in real-time from an accelerometry-based wearable motion detector (WMD). The results of an experiment with 25 healthy young adults showed that there were significant differences between gait cycle parameters of normal gaits and abnormal gaits derived from the WMD. Five PD patients diagnosed as Hoehn and Yahr stage I to II were recruited. It is difficult to collect data of abnormal gaits of the PD patients; therefore, ranges of the gait cycle parameters of abnormal gaits of PD patients were estimated statistically based on the lower confidence limit of the gait cycle parameters of their normal gaits. These results may lead to the future development of wearable sensors enabling real-time recognition of abnormal gaits of PD patients. Ambulatory rehabilitation, gait assessment and personal telecare for people with gait disorders are also possible applications. © 2014 National Taiwan University.
Seda Chemical Products Co. | Date: 2011-09-22
The present invention is to provide an automated anti-snoring bed system, which includes a bed designed to support a user lying thereon and internally provided with a driving device, a sensing device able to send out a detection signal toward the users chest at regular intervals of time and receive a reflected signal returning from the user in response to the detection signal, and a control device. When the sensing device determines that the user is snoring according to the reflected signal, the sensing device sends out a control command to the control device and the control device then drives the driving device to change the configuration of the bed to a mode for stopping the user from snoring. Thus, the user is prevented not only from sleep disorders, but also from sleep apnea which may otherwise jeopardize the users sleeping quality and health.
Seda Chemical Products Co. | Date: 2013-03-01
The present invention is to provide an imperceptible motion sensing device, which includes a non-conductive elastomer made of a pliable and elastic non-conductor (e.g., polyurethane) and having a bumpy side formed with at least one sunken portion thereon, at least one conductive fiber positioned in the at least one sunken portion respectively (e.g., by sewing), and a conductive elastomer made of a pliable and elastic conductor (e.g., a conductive foam or conductive rubber) and provided on the bumpy side of the non-conductive elastomer. When the sensing device is compressed by an external force, corresponding portions of the conductive elastomer and the non-conductive elastomer are compressed and deformed, causing contact and hence electrical connection between the conductive elastomer and the at least one conductive fiber. Thus, the imperceptible motion sensing device not only provides more accurate and more sensitive signal detection, but also ensures consistent performance even after long-term use.
Seda Chemical Products Co. | Date: 2015-04-08
The present invention is to provide a monitoring system including a plurality of motion sensing carpets and a monitoring device (e.g., a computer) electrically connected to one of the motion sensing carpets serving as a control unit while all the other motion sensing carpets directly or indirectly joined to the control unit serves as auxiliary units. The monitoring device is able to carry out a topology algorithm and then establish a topology matrix of the motion sensing carpets in a stepwise manner so as to obtain the relative location of each motion sensing carpet. When any of the motion sensing carpets is subjected to pressure caused by a senior member or child in the family toppling over thereon (e.g., an accident) and generates a sensing signal, the monitoring device can rapidly know from the topology matrix the exact location of the accident according to the sensing signal.
Seda Chemical Products Co. | Date: 2015-05-16
The present invention provides an activity-sensing ground pad for integrating with a monitoring apparatus to continuously monitor human activity in the home environment. The activity-sensing ground pad includes a modular base, a sensing layer arranged on the modular base, an insulating layer arranged on the sensing layer, and a conductive elastic layer formed to cover the insulating layer. Specifically, the modular base has a first assembling side with a plurality of first engagement portions thereon and a second assembling side opposite to the first assembling side with a plurality of second engagement portions thereon, wherein a first electrical connector is arranged on one of the engaging portions, and a second electrical connector is arranged on one of the engaging portions in correspondence with the first electrical connector.