Eye Blink Frequency Research Articles

A survey on drowsiness detection system with advanced face tracking

To address the increasing dangers associated with driver and worker fatigue, this project introduces an advanced Drowsiness Detection System featuring state-of-the-art face-tracking capabilities. The pressing need for fatigue detection is evident in the alarming figures of 800 annual fatalities and 50,000 injuries resulting from drowsy driving incidents. This research expands the application of the technology to industrial workplaces, where the consequences of drowsiness are equally severe. Our comprehensive approach involves real-time monitoring of facial features, with a focus on eye movements and eyelid patterns. This system goes beyond traditional boundaries, covering drivers and industrial workers operating heavy machinery. By incorporating facial landmarks and introducing the innovative Eyes Aspect Ratio parameter, our technology offers a precise assessment of weariness in individuals within the current frame. This approach enhances safety measures in smart transportation systems and industrial settings. Integrating facial landmarks allows for a nuanced understanding of fatigue, recognizing subtle changes in facial expressions and movements indicative of drowsiness. The Eyes Aspect Ratio parameter, a novel addition, improves weariness assessment precision by considering factors such as eye closure duration, blink frequency, and gaze direction. These outcomes signify a significant contribution to road safety and broader workplace security. By mitigating inherent risks associated with drowsiness among industrial workers, our technology aims to reduce accidents, prevent injuries, and save lives across various occupational settings. The potential impact extends beyond individuals, influencing organizational safety protocols and contributing to the overall well-being of workers in high-risk environments.

Detection of fatigue driving behavior based on facial expression

The scene environment in the cab is complex and changeable, which is easy to be disturbed by the changes of weather, light and other conditions, which brings many difficulties to the driver’s fatigue driving detection. This paper mainly analyzes the specific characteristics of the driving indoor environment, uses some technologies in the field of computer vision and image processing to improve the image quality, uses the Adaboost face detection algorithm based on Haar-like features, to detect and locate the driver’s face in the cockpit, and reduces the face detection area to determine whether the driver looks left and right or bowed. Then, on the basis of detecting the face, the method of gray scale integral projection is adopted to locate the eyes and the mouth, and the Bezier curve is used to fit the contour of the eyes and the mouth, and to judge the driver’s eye opening and the mouth opening by comprehensively analyzing the vertical and horizontal ratio. Later, ocular fatigue analysis was performed by using the PERCLOS(Percentage of Eyelid Closure over the Pupil over Time) criteria and by eyeblink frequency, and mouth fatigue analysis was also performed by the frequency of yawning.

Electroacupuncture Alleviates Dry Eye Ocular Pain Through TNF-ɑ Mediated ERK1/2/P2X3R Signaling Pathway in SD Rats.

This study aimed to examine electroacupuncture's influence on ocular pain and its potential modulation of the TNF-ɑ mediated ERK1/2/P2X3R signaling pathway in dry eye-induced rat models. Male Sprague-Dawley rats with induced dry eye, achieved through extraorbital lacrimal gland removal, were treated with electroacupuncture. Comprehensive metrics such as the corneal mechanical perception threshold, palpebral fissure height, eyeblink frequency, eye wiping duration, behavioral changes in the open field test, and the forced swimming test were employed. Additionally, morphological changes in microglia and neurons were observed. Expression patterns of key markers, TNF-ɑ, TNFR1, p-ERK1/2, and P2X3R, in the trigeminal ganglion (TG) and spinal trigeminal nucleus caudalis (SpVc) regions, were studied with etanercept serving as a control to decipher the biochemistry of electroacupuncture's therapeutic effects. Electroacupuncture treatment demonstrated a notable decrease in the corneal mechanical perception threshold, improvement in palpebral fissure height, and significant reductions in both eyeblink frequency and eye wiping duration. Moreover, it exhibited a promising role in anxiety alleviation. Notably, the technique effectively diminished ocular pain by curbing microglial and neuronal activation in the TG and SpVc regions. Furthermore, it potently downregulated TNF-ɑ, TNFR1, p-ERK1/2, and P2X3R expression within these regions. Electroacupuncture attenuated damage to sensory nerve pathways, reduced pain, and eased anxiety in dry eye-afflicted rats. The findings suggest a crucial role of TNF-ɑ mediated ERK1/2/P2X3R signaling pathway inhibition by electroacupuncture in these benefits.

Investigation of Factors Affecting Spontaneous Eye Blink Frequency in Parkinson's Disease

Giriş ve Amaç: Parkinson hastalığı (PH) beyinde dopaminerjik kayıpla giden nörodejeneratif bir hareket bozukluğudur. Spontan göz kırpma sıklığı (SGKS) da beynin dopamin kaynakları hakkında bilgi veren bir belirteç olduğu bilinmektedir. Bu bağlamda, Türkiye’deki Parkinson hastalarında spontan göz kırpma sıklığının ortaya konması, bu sıklığa etki eden faktörlerin araştırılması ve bir biyoelirteç olarak klinik PH alt tiplerini belirlemede SGKS’nin değerinin belirlenmesi için bu çalışmayı tasarladık.
 Gereç ve Yöntemler: Çalışmamız için Temmuz 2016-Temmuz 2021 tarihleri arasında Koç Üniversitesi Nöroloji Bölümüne başvuran ve en az bir dakikalık muayene videosu mevcut olan 168 hasta retrospektif olarak taranmıştır. Dosyalarından PH teşhisi olan 119 hasta çalışmaya dahil edilmiştir. Hastaların 1 dakikadaki göz kırpma sayıları ile takip bilgileri arasındaki ilişki için analizler gerçekleştirilmiştir. 
 Bulgular: Çalışmamıza katılan hastaların medyan yaşı 60 (52-69) olarak saptanmıştır. Katılımcılardan 41 tanesi (%35) kadındır. Grubumuzun spontan göz kırpma sıklığı 12 (6-25)/dk olarak ölçülmüştür. Göz kırpma sıklığı ikili lojistik regresyon analizlerinde, cinsiyet, hastalık süresi, hastalık klinik tipi ve l-dopa eşdeğer dozu ile beraber değerlendirildiğinde yaşla ilişkili bulunmuştur (p=0,021).
 Sonuç: Sonuç olarak SGKS yaşla beraber düşüş göstermektedir. Parkinson hastalarında spontan göz kırpma sıklığı, cinsiyet, hastalık süresi, hastalık klinik tipi ve kullanılan dopaminerjik ilaçların l-dopa eşdeğer dozundan bağımsız olarak hastanın yaşı ile ilişkilidir. Bu nedenle SGKS, Parkinson hastalığı popülasyonunda kategorizasyon için güçlü bir biyobelirteç olarak kullanılamaz.

Discomfort Glare Perception by Drivers—Establishing a Link between Subjective and Psychophysiological Assessment

The broad application of LEDs for automotive lighting purposes, together with new discoveries in vision physiology, is creating new challenges in the field of glare perception. The purpose of this study was to link subjective and objective measures of driver-perceived glare following different light sources used in car headlamps. In order to achieve this, a combination of subjective evaluation using an adapted version of the de Boer scale and objective measures based on psychophysiological data was applied. Predominantly, skin conductance response (SCR), heart rate variability (HRV), and eye-blinking frequency (vertical electrooculography, vEOG) were recorded. Though there was some evidence suggesting lower discomfort with glare from light sources with a lower correlated color temperature, the results were generally inconclusive. This illustrates the urgent need to study the linkage between light source properties and subjective and objective glare measures in deeper detail, so that the technical norms governing car headlamps can reflect the needs of human physiology and psychophysiology.

Relationship between Eye Blink Frequency and Incremental Exercise among Young Healthy Men.

The aim of the study was to verify the correlation between the frequency of blinking and aerobic physical exercise. The research subjects were 13 healthy man aged 23.3 ± 1 year. Measurements of the blink rate and eye closure times were performed during a progressive aerobic test on a cycle ergometer. During the test, power was gradually increased every minute by 25 W, starting from 50 W. Data acquisition involved using a GoPro camera mounted to the helmet of the research subject. The test continued until the research subject refused to continue. The subjects did not know the goal of the test, in order to ensure objectivity and obtain natural results. The largest number of statistically significant differences was observed between the initial stages and 250 W, as well as between 250 W and 325 W. The analysis showed no significant differences in blink rate, eye closure time, and single blink time in terms of heart rate ranges. Regression models were also determined for eye closure time, blink frequency, and single blink time. The analysis showed that blink frequency and eye closure time were determined by a group of factors (the value of cycle ergometer load power, heart rate, body weight, adipose tissue mass, fat-free mass, and total body water and body surface ratio).

The impact of mild traumatic brain injury on reading comprehension and eye movements: preliminary results

IntroductionIndividuals who sustain a mild traumatic brain injury (mTBI) can suffer from executive function, working memory, and attention deficits, which can impact functional task performance, including reading comprehension. Individuals with mTBI commonly report reading difficulties, but such difficulties have been historically difficult to capture using behavioral measures. The current study examined reading performance in those with and without mTBI using eye-tracking measures, which may be more sensitive to reading impairment in mTBI. Method/ResultsIn Experiment 1, 26 participants with a history of mTBI and 26 healthy control participants completed working memory (WM) and reading comprehension tasks. We found no differences in behavioral measures but found that spontaneous eye-blinking frequency was lower during the reading task in the mTBI group. In Experiment 2, we explored the impact of auditory distraction (e.g., multi-talker babble) on reading and memory performance. Twenty-three new participants with a history of mTBI and 26 healthy control participants completed a short-term memory (STM) task, a WM task, and a reading comprehension task under two distraction conditions. As in Experiment 1, we found no differences on behavioral measures, but observed significant differences on spontaneous eye-blinking frequency between those with and without mTBI. Group differences in distraction effects were also observed and performance on the WM task predicted reading comprehension performance. ConclusionsThe lack of differences on behavioral measures between groups, but lower frequencies of spontaneous eye blinking in the mTBI group suggests that while these individuals successfully completed the reading comprehension task, they may require more cognitive resources to do so.

Perception of cuts in different editing styles

The goal of this work is to explain how the cuts and their insertion in different editing styles influence the attention of viewers. The starting hypothesis is that viewers’ response to cuts varies depending on whether they watch a movie with a classical versus a messy or chaotic editing style. To undertake this investigation, we created three videos with the same narrative content and duration but different editing styles. One video was a fixed one-shot movie. Another video followed a classical editing style, based on the rules of classic Hollywood movies, according to David Bordwell’s studies. The other video used a chaotic style, beyond post-classic, which broke the classical rules of continuity and was inspired by music video clips. We showed these stimuli to 40 subjects while recording their brain activity using the electroencephalography (EEG) technique. The results showed that cuts reduce the eyeblink frequency during the second after they are seen. Since blinking is a well-known attention marker, we propose that cuts increase viewers’ attention. Cuts initiate a flow of electrical activity from the visual cortex to the cognitive processing zone in the prefrontal area. We also found that the different editing styles in which cuts are inserted affected perception, confirming the initial hypothesis. These results could be of great interest and utility for creators of audiovisual content and the management of attention in their work.

In the blink of an eye: Quantitative blink dynamics predict deceptive personality traits in forensic interviews

It is commonly believed that eye movements and blinks can be indicative of deception, however, there are few laboratory studies of such effects in general and no studies in real-world forensic populations in particular. Here we test the hypothesis that automated eye blink detection and blink frequency dynamics would predict trait levels of deception in a forensic sample. Participants were incarcerated male offenders (n = 125) undergoing life history interviews which were used in part to assess psychopathic personality traits using the Hare Psychopathy Checklist-Revised. Psychopathy is a personality disorder characterized in part by trait dishonesty, manipulation, and pathological lying. We developed a novel automated image analyses approach using hidden Markov machines, where the assumption is that an underlying hidden process influences the observable, measurable process (i.e., deception). Consistent with hypotheses, blink dynamics were predictive of interpersonal psychopathic traits (i.e., pathological lying and conning/manipulative behavior). This study provides the first evidence that blink dynamics from a naturalistic forensic interview, may help understand individual differences in trait deception.

Design of Microsleep Alerting System of Pilot to Reduce Air Accidents

The pilot’s micro sleep often caused by fatigue and/or drowsiness receives increasing attention for the last few years, especially after it became evident that pilot’s micro sleep also one of the major factor causing serious aircraft accidents.
 The system comprises EOG, EEG and IR module. EEG measures the electrical activity of the brain called brain wave pattern through intrusive electrodes. EOG tapes the electrical potential of eyeball movements and the IR module senses the eye blink frequency. Then all these signals are applied to a robust signal processing unit and microcontroller. When an indicating feature corresponds to the micro sleep events are detected, the warning system is activated. This envisioned micro sleep alerting system would continuously monitor the alertness of the pilot and provides immediate warning signal, when micro sleep detected with high certainty.

Chronic Tear Deficiency Sensitizes Transient Receptor Potential Vanilloid 1-Mediated Responses in Corneal Sensory Nerves.

Chronic tear deficiency enhances the excitability of corneal cold-sensitive nerves that detect ocular dryness, which can lead to discomfort in patients with dry eye disease (DED). However, changes in corneal nerve excitations through the polymodal nociceptor “transient receptor potential vanilloid 1” (TRPV1) and the potential link between this receptor and symptoms of DED remain unclear. In this study, we examined the firing properties of corneal cold-sensitive nerves expressing TRPV1 and possible contributions of chronic tear deficiency to corneal nerve excitability by TRPV1 activation. The bilateral excision of lacrimal glands in guinea pigs decreased the tear volume and increased the frequency of spontaneous eyeblinks 1–4 weeks after surgery. An analysis of the firing properties of the cold-sensitive nerves was performed by single-unit recordings of corneal preparations 4 weeks after surgery in both the sham-operated and gland-excised groups. Perfusion of the TRPV1 agonist, capsaicin (1 μM), transiently increased the firing frequency in approximately 46–48% of the cold-sensitive nerves characterized by low-background activity and high threshold (LB-HT) cold thermoreceptors in both groups. Gland excision significantly decreased the latency of capsaicin-induced firing in cold-sensitive nerves; however, its magnitude was unchanged. Calcium imaging of cultured trigeminal ganglion neurons from both groups showed that intracellular calcium elevation of corneal neurons induced by a low concentration of capsaicin (0.03 μM) was significantly larger in the gland excision group, regardless of responsiveness to cold. An immunohistochemical study of the trigeminal ganglion revealed that gland excision significantly increased the proportion of corneal neurons enclosed by glial fibrillary acidic protein (GFAP)-immunopositive satellite glial cells. Topical application of the TRPV1 antagonist, A784168 (30 μM), on the ocular surface attenuated eye-blink frequency after gland excision. Furthermore, gland excision enhanced blink behavior induced by a low concentration of capsaicin (0.1 μM). These results suggest that chronic tear deficiency sensitizes the TRPV1-mediated response in the corneal LB-HT cold thermoreceptors and cold-insensitive polymodal nociceptors, which may be linked to dry eye discomfort and hyperalgesia resulting from nociceptive stimuli in aqueous-deficient dry eyes.

Drowsiness or mind-wandering? Fluctuations in ocular parameters during attentional lapses

Two independent lines of evidence suggest that drowsiness and mind-wandering share common neurocognitive processes indexed by ocular parameters (e.g., eyeblink frequency and pupil dynamics). Mind-wandering and drowsiness frequently co-occur, however, such that it remains unclear whether observed oculometric variations are related to mind-wandering, drowsiness, or a mix of both. To address this issue, we assessed fluctuations in mind-wandering and sleepiness during a sustained attention task while ocular parameters were recorded. Results showed that oculometric variations during mind-wandering were fully explained by increased sleepiness. However, mind-wandering and sleepiness had additive deleterious effects on performance that were not fully explained by ocular parameters. These findings suggest that oculometric variations during task performance reflect increased drowsiness rather than processes specifically involved in mind-wandering, and that the neurocognitive processes indexed by oculometric parameters (e.g., regulatory processes of the locus coeruleus norepinephrine system) do not fully explain how mind-wandering and sleepiness cause attentional lapses.

A short-term inhalation study to assess the reversibility of sensory irritation in human volunteers

Sensory irritation is an acute adverse effect caused by chemicals that stimulate chemoreceptors of the upper respiratory tract or the mucous membranes of the outer eye. The avoidance of this end point is of uttermost importance in regulatory toxicology. In this study, repeated exposures to ethyl acrylate were analyzed to investigate possible carryover effects from day to day for different markers of sensory irritation. Thirty healthy subjects were exposed for 4 h on five subsequent days to ethyl acrylate at concentrations permitted by the German occupational exposure limit at the time of study. Ratings of eye irritation as well as eye blinking frequencies indicate the elicitation of sensory irritation. These markers of sensory irritation showed a distinct time course on every single day. However, cumulative carryover effects could not be identified across the week for any marker. The rhinological and biochemical markers could not reveal hints for more pronounced sensory irritation. Neither increased markers of neurogenic inflammation nor markers of immune response could be identified. Furthermore, the performance on neurobehavioral tests was not affected by ethyl acrylate and despite the strong odor of ethyl acrylate the participants improved their performances from day to day. While the affected physiological marker, the increased eye blinking frequency stays roughly on the same level across the week, subjective markers like perception of eye irritation decrease slightly from day to day though the temporal pattern of, i.e., eye irritation perception stays the same on each day. A hypothetical model of eye irritation time course derived from PK/PD modeling of the rabbit eye could explain the within-day time course of eye irritation ratings repeatedly found in this study more precisely.

Drowsiness detection using Eye-Blink frequency and Yawn count for Driver Alert

Several reasons can be sighted for the cause of these road accidents. Few of them include lack of sleep, drunk driving, violation of traffic rules, etc. Amongst them, the state of drowsiness and drunk driving alone contributes to 36% of accidents. Though a number of national schemes and traffic rules have been implemented to avoid these road accidents, it could only bring down the accident rate by 10%. As car accidents are one of the major issues of concern, this paper will be discussing mainly on Drunk driving or drowsiness. In these recent years, various methods have been proposed to implement drowsiness detection based on Hough transforms. Here, in this paper, we have determined a technique to detect drowsiness among car drivers and alert them whenever they tend to sleep. The algorithm is based on eye-blink and yawn frequency. It deals with an eye blink yawn frequency algorithm that uses eye coordinates to keep track of person and determine the open or closed state of the eye and generate an alarm if the driver is drowsy. The yawn count is determined by checking the frequency of yawn count with a minimum threshold value.

Morphologically modulated laser-patterned reduced graphene oxide strain sensors for human fatigue recognition

Laser heating provides an effective method to produce thermally reduced graphene oxide (rGO), it can also pattern the designed layout on the surface of graphene oxide (GO) during the reduction process. In this work, we demonstrated a flexible strain sensor based on the morphologically modulated laser-patterned reduced graphene oxide (LPG) film with a one-step process. Compared with the strain sensor using flat patterned rGO (0%–1.2%) and curved-grid patterned rGO (CGPG) (0%–4.1%), the strain sensor based on rectangular-grid patterned rGO (RGPG) have highest gauge factor (GF), up to 133 under 2.7% of physical deformation. Meanwhile, the RGPG strain sensors exhibit extraordinary linearity in a relatively large range of deformation (0%–2.7%) and excellent endurance for over 1000 stretching-releasing circles. The RGPG strain sensor was used to monitor human fatigue. By analyzing eye blinking frequency and duration, it is possible to evaluate the fatigue level. We anticipate that the RGPG based strain sensor, prepared via a relatively simple and cost-effective process, may open up a broad spectrum of practical applications, such as driver fatigue evaluation and smart monitoring of human body movements.

Novel Wearable Sensors for Biomechanical Movement Monitoring Based on Electromagnetic Sensing Techniques

For many diseases, treatment is more effective in the early stage of a disease; hence detection of the early signs of a disease is highly significant. Biomechanical motion can be such an early indicator. This paper proposes a novel method for monitoring biomechanical motion based on electromagnetic sensing techniques. The proposed method has the advantages of being non-invasive, easy to perform, of low cost, and highly effective. Theoretical models are set up to model the sensor responses and wearable sensor systems are designed. Experiments are performed to monitor various biomechanical movements, including eye blinking frequency, finger/wrist bending level and frequency. From experiments, both the fast blinking behavior with an average frequency of ~1.1 Hz and the slow blinking behavior with an average frequency of 0.4 Hz can be monitored; various finger-bending status are identified, such as the fast finger-bending with an average frequency of ~1.5 Hz and the slow finger-bending with an average frequency of ~1/6 Hz. Both simulations and measurement results indicate that the proposed electromagnetic sensing method can be used for biomechanical movement detection and the system has the advantages of being easy to put on / take off, and without the need for direct contact between sensors and human body.

Ethyl acrylate: influence of sex or atopy on perceptual ratings and eye blink frequency.

Occupational exposure limits (OELs) are derived for protection from health hazards, assuming that exposed subjects are healthy adult workers. Whether differences in susceptibility to sensory irritation effects from airborne chemicals have to be taken into account is currently under discussion. Thus, we chose atopics as a healthy but possibly susceptible subpopulation that can be identified with a clinical test. To investigate the influence of sex or atopy on sensitivity to airborne chemicals, 22subjects were exposed for 4 h to ethyl acrylate at three concentrations: 0.05ppm (odor threshold; sham), 5ppm (constant), and varying exposure between 0 and 10ppm. Odor intensity decreased and eye irritation ratings increased in a dose-dependent manner, reflecting the time course of the exposure scenarios. The reports of moderate-to-strong eye irritation were verified by significant increases in eye blink frequency. Our results show that women reported subjective eye irritation to an increasing degree. However, these sex-related differences in ratings could not be verified by objective assessment of eye blink frequency. Atopic subjects reported higher odor intensity than non-atopic subjects, but only during the sham (odorous butnotirritating) exposure condition. Differences in ratings on annoyance, and eye or nose irritation were not found. Furthermore, the study revealed that atopic subjects might belong to a group of subjects with frequent eye blink activity. Although the relative increase in blink rates was more pronounced in non-atopic subjects, atopic subjects had significant higher blink rates at the end of the exposure to varying ethyl acrylate concentrations. Our results do not support that atopy enhances chemosensory effects if only the increase of blink rates and not the absolute height are considered as adverse effect. Nevertheless, the results indicate that individuals with frequent eye blink activity should be distinguished from those with normal eye blink activity while investigating blink rates as objective parameter of eye irritation.

An Eye-tracking based Evaluation on the Effect of Far-infrared Therapy for Relieving Visual Fatigue.

Far-infrared (FIR) therapy is attracting great attention in clinical applications, whereas studies on its effect to relieve visual fatigue stay exiguity. This study tried to fill the gap by utilizing two novel eye-tracking parameters, i.e., the fixation frequency (FF) and saccade amplitude (SA), along with traditional indicators (i.e., the eye blink frequency (BF) and subjective score (SS)) of visual fatigue in two eye-tracking tests, i.e., the random digit search and fixed-point gaze. Twenty healthy subjects participated in the experiment during the same period of two consecutive days. A visual stimulus program was presented to each subject before the subjective grading and eye-tracking tests, followed by the relief of eyes with either using a FIR thermal eye mask or physically closing eyes. Finally, subjective grading and eye-tracking tests were re-performed. Results showed that FF and SA, along with BF and SS, were significantly different when measured before and after the eye relief with FIR therapy mask, suggesting that FF and SA were useful in evaluating visual fatigue. In addition, FIR therapy yielded much better performance than eye-closing rest, indicating that FIR therapy had the potential in accelerating the relief of visual fatigue.

Sensitivity analysis of changes in human physiological indicators observed in soundscapes

The objective of this study was to determine changes in physiological indicators with time in different soundscapes and their correlation with the results of subjective restorative evaluation. Physiological indicators including the heart rate (HR), amplitude of the R-wave (ΔR), heart rate variability (HRV), electroencephalography alpha reactivity (α-EEG), electroencephalography beta reactivity (β-EEG), eye blink frequency (BF), respiratory frequency (RF), respiratory depth (RD), skin conductance level (SCL), and skin temperature (ST) were measured and analysed through audio-visual reduction in a laboratory, and the obtained data were compared with the answers to a perceived restorativeness soundscape scale survey. Through the analysis of variance by a repeated measures method, it was found that all physiological indicators (except for α-EEG) changed after one minute of measurements. Furthermore, BF and ST were not affected by the changes in the soundscape type, and the natural sound decreased the levels of HR, RF, and RD and increased the values of ΔR, HRV, α-EEG, and β-EEG. In addition, a canonical correlation analysis was performed to determine the correlation between the physiological indicators and subjective evaluation factors. The relationship between the physiological parameters measured within the first minute and results of subjective evaluation was relatively strong but insufficient for accurately interpreting the obtained physiological responses using only the subjective evaluation data.

Highly transparent triboelectric nanogenerator utilizing in-situ chemically welded silver nanowire network as electrode for mechanical energy harvesting and body motion monitoring

Triboelectric nanogenerators (TENGs) functioning as energy harvester as well as body motion sensor pose great significance for oncoming wearable (opto)electronic systems. Herein, A transparent welded AgNW electrode based TENG (WA-TENG) is demonstrated. AgNWs are in-situ chemically welded with surfacial silver oxide naturally formed in air as solder and hydrazine as reductant based on epitaxial recrystallization, ensuring high transparency and conductivity of the electrode used in TENG. This welding endows AgNW electrodes with a high transmittance of 96% (at 77 Ω/sq sheet resistance) and low sheet resistance of 18 Ω/sq (at 92% transmittance), meanwhile, can effectively heal the damaged AgNW network. The WA-TENG exhibits a transmittance up to 95%, and generates an open-circuit voltage (Voc) of 66 V, short-circuit current (Isc) of 8.6 μA, and peak power density of 446 mW/m2 under single-electrode mode at 2 Hz. Besides, it can be employed to monitor human body motions, including bending of the elbow, eye blinking, and bending angle and frequency of the finger. Lastly, the WA-TENG serves as a tactile sensor to record touch control of a smart phone by the finger. The WA-TENG with standout transparency, electric output and sensing performance underscores the crucial role in self-powered wearable multifunctional devices.