A novel flex sensor-based flexible smart garment for monitoring body postures

Abro, Zamir Ahmed; Zhang, Yifan; Chen, Nanliang; Hong, Chengyu; Lakho, Rafique Ahmed; Halepoto, Habiba

doi:10.1177/1528083719832854

Cited by 20 publications

(15 citation statements)

References 36 publications

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“…The lifting frame of the adjustable liquid crystal display (LCD) screen can flexibly adjust the height of the LCD screen and obtain a comfortable experience of using the computer. In the display system of the computer, the trajectory planning, navigation, and obstacle avoidance functions of the robotic arm of the monitor stand play key functions [10,11]. Kumar et al [12] performed a kinematic analysis of the motion degrees of freedom of the stent, thereby addressing the total inverse, rotational inverse, and forward kinematics.…”

Section: Introductionmentioning

confidence: 99%

Design of Active Display Stand Combing the Pressure Sensor and Kinematics Algorithm

Lei

2022

Journal of Sensors

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To solve the trouble of cervical vertebra disease caused by long working hours, this work is aimed at designing an active monitor stand to achieve the best dynamic trajectory planning. The stand operation system consists of image input, face positioning, and robotic arm. According to the user’s face positioning, the inverse kinematics method is used to calculate the steering angle in each direction, and the height and angle are adjusted to make the corresponding selection for the user’s display position on the screen. The C++ is used to program the algorithm, and its core is to control the rotation speed of the motor to ensure that the display screen will not cause any interference to the normal work of the user when the bracket moves. In the inverse operation, the Piper method is used to solve the inverse kinematics issues. After testing, the sliding wedge stroke of the developed active display stand is 0.6 mm, and the height position difference at the reference zero point after the display stand is measured with a digital altimeter is 7.12 mm, which indicates that the stand shows a large deformation after being mounted. This work is of important reference value for realizing the movement of active display stand.

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Section: Introductionmentioning

confidence: 99%

Design of Active Display Stand Combing the Pressure Sensor and Kinematics Algorithm

Lei

2022

Journal of Sensors

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“…In recent decades, wearable garments based on flex and FBG sensors have been produced to monitor joint body movement, plantar pressure measurement, and future to identify different postures of body joints in practice, but the developed systems cannot be washed [8,9].…”

Section: Introductionmentioning

confidence: 99%

An FBG-based smart wearable ring fabricated using FDM for monitoring body joint motion

Hong

Abro

Zhang

et al. 2019

Journal of Industrial Textiles

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This study proposed a new fiber Bragg grating-based smart ring for monitoring body joint postures occurred at elbow joint and knee joint positions. A single-mode fiber Bragg grating sensor was embedded into a 3D printed ring for sensing occurred deformation of the ring. The raw material used for fabricating the smart ring was polylactic acid, which was found to have the advantages of being flexible in nature and having ease of fabrication using fused deposition modeling method. The fabrication process of the fiber Bragg grating smart ring was characterized by the advantages of ease of handling, quick prototyping, high resolution, low cost, and time-saving. Bare fiber Bragg grating sensors were successfully embedded into hot printed polylactic acid material during the fused deposition modeling process, even the printing temperature of the printing nozzle exceeded 200℃. Two new smart wearable rings were fabricated and used to monitor systematic bend motion of elbow joint and knee joint. The measurement sensitivities of the two smart rings mounted at the elbow joint and knee joint were 0.0056 nm/° and 0.0276 nm/°, respectively. The corresponding maximum measurement angle within current calibration tests were 90° and 100°, respectively. The method of using both fiber Bragg grating and fused deposition modeling for sensor design can be extended for the fabrication of other sensors such as temperature sensors, strain sensors, pressure sensors, stress sensors, displacement sensors, and tilt sensors.

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“…Primarily, the insole of the right shoe was taken out, and a PVC sheet was cut by using scissors with the same dimensions as the insole of the right shoe. As the maximum pressure could be sustained on the insole when the man was in a standing position, four Flexi force sensors were selected and placed on the PVC insole [ 41 ]. The 1st, 2nd, 3rd, and 4th Flexi force sensors were, respectively, placed on the first metatarsal position, the fifth metatarsal position, the third metatarsal position, and the heel position of the insole.…”

Section: Smart Insole Developmentmentioning

confidence: 99%

“…Flex sensors are also used in gloves [ 39 ] to recognize sign language and health monitoring systems to measure the angle and motion of muscle joints [ 40 ]. Recently, flex sensors have been used in wearable technology for conducting real-time monitoring in the everyday environment [ 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 ].…”

Section: Introductionmentioning

confidence: 99%

Smart Insole Based on Flexi Force and Flex Sensor for Monitoring Different Body Postures

Lakho

Abro

Min

2022

Sensors

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This study aims to fabricate smart insoles using wireless Flexi force and bend sensing technology. Polyvinyl chloride (PVC) film was chosen as the substrate to hold all the sensors. The developed smart insole has a three-layer structure (insole-PVC layer-fabric layer) and is calibrated in an isolation laboratory to evaluate its measurement performance. One male volunteer subject exhibited four different body postures, namely tree pose, forward-leaning, squatting, and forward folding pose. Changes in pressure distribution were considered to be similar for the forward, squat, and forward-folded positions. When subjects performed a full squat, the flex sensor exhibited maximum flexion during the squat position, and the flex sensor response against the squat pose was found to be higher by about 18.18% than in the forward lean, respectively. The tree pose has the highest error rate at the first metatarsal, about 18.6%, of which the maximum absolute relative error of the sensor is less than 5%. Plantar pressure distribution and body posture measurements were successfully validated using Flexi force and flex sensors embedded in the smart insole. The smart insole proposed in this research work has broader prospects for clinical application.

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A novel flex sensor-based flexible smart garment for monitoring body postures

Cited by 20 publications

References 36 publications

Design of Active Display Stand Combing the Pressure Sensor and Kinematics Algorithm

Design of Active Display Stand Combing the Pressure Sensor and Kinematics Algorithm

An FBG-based smart wearable ring fabricated using FDM for monitoring body joint motion

Smart Insole Based on Flexi Force and Flex Sensor for Monitoring Different Body Postures

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