Detection of vital signs for multiple subjects by using self-injection-locked radar and mutually injection-locked beam scanning array

Hsu, Chung-Yi; Chuang, Cho-Ying; Wang, Fu-Kang; Horng, Tzyy‐Sheng; Hwang, Lih-Tyng

doi:10.1109/mwsym.2017.8058756

Cited by 20 publications

(7 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The result gave an average imaging error of 0.05 m and error of 30 ms in estimating the RI, which indicates the effectiveness of the designed radar system and imaging method. This system, which has more antenna elements than existing 2.4-GHz radar systems [7]- [10], generated for the first time an image from respiratory motion. The performance of this system will be evaluated with more data sets involving more participants in future work.…”

Section: Discussionmentioning

confidence: 99%

“…Digital Object Identifier 10.1109/LMWC.2020.2992541 On the other hand, lower frequency microwave radar systems with antenna array have the advantage of easily penetrating thick clothing and comforters to measure physiological signals even when a person is wrapped in a thick quilt. Hsu et al [7] built a 2.4-GHz four-element radar using self-injection-locked radar. Mostafanezhad et al [8] built a 2.4-GHz four-element radar system using a time-domain multiplexing circuit to measure respiration of a single person.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Respiratory Motion Imaging Using 2.4-GHz Nine-Element-Array Continuous-Wave Radar

Sakamoto

Koda

2020

IEEE Microw. Wireless Compon. Lett.

View full text Add to dashboard Cite

A radar system with antenna array and signal processing method are presented for noncontact monitoring of human respiration. We develop a 2.4-GHz nine-element radar system and use it to measure the respiratory rate of a participant lying on a bed. The results show that this system and method can image a respiring body and estimate its instantaneous respiration rate accurately. The accuracy of the proposed system is validated by simultaneously recording the ribcage circumference using a piezoelectric respiratory sensor and the 3-D body shape using a depth camera. The results indicate the potential of this system for long-term respiratory monitoring during sleep periods.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Respiratory Motion Imaging Using 2.4-GHz Nine-Element-Array Continuous-Wave Radar

Sakamoto

Koda

2020

IEEE Microw. Wireless Compon. Lett.

View full text Add to dashboard Cite

show abstract

“…There have been several engineering research articles of the device presented by the inventors. The technologies of self-injection-locked radar and infrared light are used in non-contact detection of vital signs, included body temperature, heart rate, respiratory rate and body positioning [3][4][5][6][7]. As more information is collected, the software of this device is able to conduct an autocalibration to extract the displacement information, which enhances the measurement accuracy of body temperature, heart rate and respiratory rate.…”

Section: Methodsmentioning

confidence: 99%

A Novel Non-contact Self-Injection-Locked Radar for Vital Sign Sensing and Body Movement Monitoring in COVID-19 Isolation Ward

et al. 2020

View full text Add to dashboard Cite

Background The outbreak of Coronavirus disease (COVID-19) pandemic has become the most serious global health issue. Isolation policy in hospitals is one of the most crucial protocols to prevent nosocomial infection of COVID-19. It is important to monitor and assess the physical conditions of the patients in isolation. Methods Our institution has installed the novel non-contact wireless sensor for vital sign sensing and body movement monitoring for patients in COVID-19 isolation ward. Results We have collected and compared data between the radar record with the nurse's handover record of two patients, one recorded for 13 days and the other recorded for 5 days. The P value by Fisher's exact test were 0.139 (temperature, P > 0.05) and 0.292 (heart beat rate, P > 0.05) respectively. Conclusions This is the first report about the application experience of this equipment. Therefore we attempted to share the experience and try to apply this equipment in COVID-19 patients in future to offer the more reliable and safe policy.

show abstract

“…This requires not low-cost and not easy to find material because this requires high-frequency antenna need the material with the lowest loss[2]- [6]. In addition, integrating the antenna has a consequence in complicated fabrication to get true frequency so requires a lot of electric circuits that expensive [7]. The method using the various antenna and line feed circuits more compact than the general antenna.…”

Section: Introductionmentioning

confidence: 99%

Directional 1900 MHZ Square Patch Ring Slot Microstrip Antenna for Wcdma

Mujahidin

2018

JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science)

View full text Add to dashboard Cite

Telecommunications systems especially WCDMA networks, require an antenna to convert electromagnetic energy in the air into electrical energy will be processed into the information signal. WCDMA (Wideband Code-Division Multiple Access) network works at a frequency of 1900 MHz with a complicated configuration antenna and has high-cost components. Directional 1900 MHz Square Patch Ring Slot Microstrip Antenna for WCDMA has been proposed. This is a novel technique in telecommunication configuration to make directional antenna use more proper and efficient component by using low cost and easy to find material at 1900 MHz frequency. This compact configuration consists of a single rectangular patch, a substrate, a ground plan and ring slot on the ground plane. This antenna produces an accurate frequency at 1900MHz with the value of-15.19 dB and gains 6.78 dBi at. The overall size of the proposed antenna is 55.7 mm times 49.2 mm with FR4 (Phenolic White Paper) with a dielectric constant value is 4.4.

show abstract

Detection of vital signs for multiple subjects by using self-injection-locked radar and mutually injection-locked beam scanning array

Cited by 20 publications

References 7 publications

Respiratory Motion Imaging Using 2.4-GHz Nine-Element-Array Continuous-Wave Radar

Respiratory Motion Imaging Using 2.4-GHz Nine-Element-Array Continuous-Wave Radar

A Novel Non-contact Self-Injection-Locked Radar for Vital Sign Sensing and Body Movement Monitoring in COVID-19 Isolation Ward

Directional 1900 MHZ Square Patch Ring Slot Microstrip Antenna for Wcdma

Contact Info

Product

Resources

About