Walking Device Research Articles

Design of automated collection and transfer robot for powder and flexible materials

In order to solve the problem of collection and transport of toxic or odorous powder and flexible materials in industrial production, this article designs a robot that automatically collects and transports materials. Firstly, the system composition of the automated collection and transfer robot with the functions of collecting, transporting and trajectory traveling is discussed. The working principle of each functional module is introduced. The mechanical structure design of parallel parallelogram switch mechanism, grade I and II height adjusting mechanism, transfer device and walking device is completed. Secondly, a control system with STM32 chip as the core is designed. With the signal of relevant sensors as the auxiliary, the material collection, posture adjustment and trajectory traveling are realized. Finally, the rationality of the scheme is verified by the static and dynamic simulation of the key components of each functional module of the robot. The designed robot had been proved to have good running stability and reliability by simulation results, prototype trial and commissioning for key parts.

Well-being and functional abilities in nursing home and home living seniors in Latvia

The society in developed countries is aging. 1.5% of seniors live in nursing homes in Latvia.Aim: to compare functional abilities and well-being between nursing home and home living Latvian seniors.Methods:280 home living seniors and 285 from nursing homes, age ≥ 65 years able to respond to questions and stand up were included in the study based on availability. They were asked to describe their well-being from very bad to very good. The functional abilities were assessed by hand grip strength, the ability to stand up without assistance, the dependence on caregivers (1 – independent, 2 – partly dependent, 3 – fully dependent), the use of walking device assistance devices.Results:The home living seniors could stand up without assistance of hands more often than nursing home residents (60.4% vs. 38.2%,p< 0.001). The handgrip strength was higher in the elderly community-dwelling women (0.3 (0.2–0.3) vs. 0.2 (0.15–0.2) Ba),p< 0.001. The nursing home residents were less often independent (62.8% vs. 83.9%,p< 0.001), more often partly dependent (30.2% vs. 14.6%,p< 0.001) and independent (7.0% vs. 1.4%,p= 0,001) while performing activities of daily living. The nursing home residents had higher walking device assistance needs (mean rank 345.7 vs. 219.2,p< 0.001) and described their well-being as “good” more often (28.4% vs. 16.8%,p= 0.001) and less often as “bad” or “very bad” (18.9% vs. 26.8%,p= 0.048). Conclusion. The subjective well-being of elderly nurse home residents is better than of home living seniors despite having less functional abilities.

The Design of Large Arc-shape High-precision Walking Device in TV (thermal-vacuum) Conditions

The large-sized space environmental simulation test facility is mainly used for providing thermal radiation environment in high-vacuum, cold and dark space for satellites, spacecraft, lunar spacecraft to carry out whole satellite thermal vacuum test and for large equipment like antenna to carry out tests in TV conditions. Monitoring the spacecraft’s surface optical image or temperature is a main task in space environment simulation test. In previous tests, optical image test mainly took place in a fixed position, so the measuring location and angle are limited. This paper focuses on large spherical space environmental simulation test facility, and designs a large arc-shape high-precision walking device in a space environment simulation test device. It introduces key technology in detail like structure design, thermal design, processes and manufacturing, etc. The test results show that this device can work steadily and reliably under simulation space environments, and the precision exceeds 0.5°.

A Safe Torque Limiter Design Applied to An Assistive Walking Device against Unexpected Load

A Safe Torque Limiter Design Applied to An Assistive Walking Device against Unexpected Load

A nationwide Danish survey on the use of green spaces by people with mobility disabilities.

There is increasing awareness of the importance and health benefits of living near green spaces. Research usually focuses on the general population's use of green spaces and there has been little focus on the use of green spaces by specific groups, such as people with mobility disabilities. This represents a significant knowledge gap with regard to facilitating access to healthy green environments by all population groups. This study aims to provide knowledge of the use of green spaces by people with mobility disabilities. The study was based on data from the Danish Health and Morbidity Survey in 2005. The study participants consisted of 11,238 adult Danes, 383 of whom reported mobility disabilities, meaning that they were dependent on assistive devices for walking or moving around. Multiple logistic regression analysis was used to investigate the association between mobility disability and use of green spaces. The results show that respondents who reported mobility disabilities visited green spaces less often than respondents without mobility disabilities. The severity of the mobility disability was associated with the frequency of visits. Frequency of visits was also related to the respondents' health-related quality of life status. These results highlight the need for further research into the constraints faced by people with mobility disabilities with regard to visiting green spaces.

Risk of falling among hospitalized patients with high modified Morse scores could be further Stratified

BackgroundFalls during hospitalization harbor both clinical and financial outcomes. The modified Morse fall scale [MMFS] is widely used for an in-hospital risk-of-fall assessment. Nevertheless, the majority of patients at risk of falling, i.e. with high MMFS, do not fall. The aim of this study was to ascertain our study hypothesis that certain patients' characteristics (e.g. serum electrolytes, usage of a walking device etc.) could further stratify the risk of falls among hospitalized patients with MMFS.MethodsThis was a retrospective cohort analysis of adult patients hospitalized in Internal Medicine departments.ResultsThe final cohort included 428 patients aged 76.8±14.0 years. All patients had high (9 or more) MMFS upon admission, and their mean MMFS was 16.2±6.1. A group of 139 (32.5%) patients who fell during their hospitalization was compared with a control group of 289 (67.5%) patients who did not fall. The fallers had higher MMFS, a higher prevalence of mild dependence, and a greater use of a cane or no walking device. Regression analysis showed the following patients' characteristics to be independently associated with an increased risk of falling: mild dependence (OR=3.99, 95% CI 1.97-8.08; p<0.0001), treatment by anti-epileptics (OR=3.9, 95% CI 1.36-11.18; p=0.011), treatment by hypoglycemic agents (OR=2.64, 95% CI 1.08-6.45; p= 0.033), and hypothyroidism (OR=3.66, 05%CI 1.62-8.30; p=0.002). In contrast to their role in the MMFS, the use of a walker or a wheelchair was found to decrease the risk of falling (OR=0.3, 95% CI 0.13-0.69; p=0.005 and OR=0.25, 95% CI 0.11-0.59; p= 0.002).ConclusionsFurther risk stratification of hospitalized patients, already known to have a high MMFS, which would take into account the characteristics pointed out in this study, should be attained.

Predicting successful prosthetic rehabilitation in major lower-limb amputation patients: a 15-year retrospective cohort study

ObjectiveTo determine and compare specific factors that could be associated and predictive with successful prosthetic rehabilitation in major lower-limb amputations. MethodsA 15-year long (2000–2014) retrospective observational cohort study was conducted. Two different criteria were used to define successful prosthetic rehabilitation: (1) the ability to walk at least 45m, regardless of assistive devices; and (2) walking >45m without other ambulatory aids than one cane (if required). Age, gender, comorbidities, cause and level of amputation, stump characteristics, ulcers in the preserved limb, and time between surgery and physical therapy were examined as predictors of successful prosthetic rehabilitation. ResultsA total of 169 patients (61.60±15.9 years) were included. Regarding walking ability with or without walking aids, the presence of ulcers in the preserved limb was individually associated with failed prosthetic rehabilitation (p<0.001), while being male (OR=0.21; 95%CI=0.06–0.80) and transtibial level of amputation (OR=6.73; 95%CI=1.92–23.64) were identified as independent predictors of failure and success, respectively. Regarding the criterion of successful rehabilitation, a shorter time until rehabilitation was individually associated with improved walking ability (p<0.013), while failure could be predicted by comorbidities (OR=0.48; 95%CI=0.29–0.78) and age groups of 65–75 years old (OR=0.19; 95%CI=0.05–0.78) and over 75 years old (OR=0.19; 95%CI=0.04–0.91). ConclusionsRegarding walking ability with or without walking aids, male gender and transtibial level of amputation are independently associated with failure and success respectively, whereas older age and comorbidities can predict failed prosthetic rehabilitation when assistive walking devices are considered. Future prospective cohort studies are needed to confirm these findings.

Femoral Nerve Palsy Following Total Hip Arthroplasty: Incidence and Course of Recovery

BackgroundFemoral nerve palsy (FNP) is a relatively uncommon complication following total hip arthroplasty (THA). There is little recent literature regarding the incidence of FNP and the natural course of recovery. MethodsUsing our institutional database, we identified postoperative FNPs from 17,350 consecutive primary THAs performed from 2011 to 2016. Hip exposures were performed using a direct lateral (modified Hardinge), direct anterior (Smith-Peterson), anterolateral (Watson-Jones), or posterolateral (Southern or Moore) approach. Patients with FNP were contacted to provide a subjective assessment of convalescence and underwent objective muscle testing to determine the extent of motor recovery. ResultsThe overall incidence of FNP was 0.21% after THA, with the incidence 14.8-fold higher in patients undergoing anterior hip surgery using either a direct anterior (0.40%) or anterolateral (0.64%) approach. Significant recovery from FNP did not commence for a majority of patients until greater than 6 months postoperatively. Motor weakness had resolved in 75% of patients at 33.3 months, with remaining patients suffering from mild residual weakness that typically did not necessitate an assistive walking device or a knee brace. Nearly all patients had improved sensory manifestations, but such symptoms had completely resolved in less than 20% of patients. ConclusionFNP after hip surgery remains relatively uncommon, but may increase with a growing interest in anterior THA exposures. A near complete recovery with only mild motor deficits can be expected for a majority of patients in less than 2 years, although sensory symptoms may persist.

Active lower limb orthosis with one degree of freedom for people with paraplegia.

The main challenges of designing devices for paraplegic walking can be summarized into three groups, stability and comfort, high efficiency or low energy consumption, dimensions and weight. A new economical device for people with paraplegia which tackles all problems of the three groups is introduced in this paper. The main idea of this device is based on HALO mechanism. HALO is compact passive medial hip joint orthosis with contralateral hip and ankle linkage, which keeps the feet always parallel to the ground and assists swinging the leg. The medial hip joint is equipped with one actuator in the new design and the new orthosis is called @halo. Due to this update, we can achieve more stable and smoother walking patterns with decreased energy consumption of the users, yet maintain its compact and lightweight features. It is proven by the results from preliminary experiments with able-bodied subjects during which the same device with and without actuator was evaluated. Waddling and excessive vertical elevation of the center of gravity were decreased by 40% with significantly smaller standard deviations in case of the active orthosis. There was 52% less energy spent by the user wearing @halo which was calculated from the vertical excursion difference. There was measured 38.5% bigger impulse in crutches while using passive orthosis. The new @halo device is the first active orthosis for lower limbs with just one actuated degree of freedom for users with paraplegia.

Effects of dual- and complex-task on walking ability of ambulatory individuals with spinal cord injury.

Attempting to perform dual- and complex-tasks obviously reduces the walking ability of individuals with impaired cognitive functions. However, there is no clear evidence describing the effects of dual- and complex-tasks on the walking ability of ambulatory individuals with a spinal cord injury (SCI) who have intact cognitive functions, but suffer from various degrees of sensorimotor deterioration. To primarily investigate the effects of dual- and complex-task on the walking ability of ambulatory subjects with SCI as compared to healthy individuals. In addition, the study secondarily compared the effects in subgroups of subjects with SCI, including different age groups, lesion severity and level of ability. Cross-sectional design. A major tertiary referral and community hospitals in Thailand. Thirty-seven ambulatory individuals with SCI and 13 healthy subjects. All subjects were evaluated for outcomes while they walked under four conditions, including single-task overground walking (ST-OG), dual-task overground walking (DT-OG) using a color word Stroop task, single-task obstacle crossing (ST-OC) and dual-task obstacle crossing (DT-OC). The outcomes were compared among the conditions and between the groups of subjects in terms of walking time, obstacle crossing ability and percent of Stroop task errors. With the increasing complexity of the tasks, both SCI and healthy subjects walked significantly slower (P<0.001 for those with SCI and P<0.05 for healthy subjects), but not when compared between the ST-OC and DT-OG conditions (P>0.05). Subjects also showed a greater percentage of cognitive task errors when they encountered a dual- and complex-task, particularly those with SCI who were over 50 years old, had mild lesion severity or walked with a walking device (P<0.001). The incorporation of dual- and complex-task challenged cognitive-motor interference of ambulatory individuals with SCI. The application of such tasks may benefit rehabilitation outcomes in a real-world situation for patients, especially for those who are older than 50, have mild lesion severity or use a walking device.

Prevalence of fear of falling, in a sample of elderly adults in the community

Abstract Objectives: To investigate the prevalence of fear of falling among a sample of elderly persons in the community, and to analyze its correlation with age, self-perceived health, difficulty walking, use of an assistive device for walking, history of falls, and functional capacity. Method: A cross-sectional study of 314 non-institutionalized elderly individuals, living in the city of Juiz de Fora in the state of Minas Gerais) in 2015, was carried out. A household survey was conducted and fear of falling was assessed using the Falls Efficacy Scale - International - Brazil (FES-I-BRASIL). The Spearman correlation was used to verify the correlation of the independent variables with the fear of falling. The significance level for the study was 5%. Results: The prevalence of fear of falling among the elderly was 95.2% (95% CI= 92.3; 97.3). Fear of falling was significantly correlated with all the variables analyzed: age (r= 0.199), self-perceived health (r=0.299), difficulty walking (r= -0.480), use of an assistive device for walking (r=0.337), history of falls (r= -0.177), and functional capacity (r = -0.476) . Conclusions: A high prevalence of fear of falling was observed, with a significant correlation between the outcome and the variables studied. These findings point to the need for rehabilitation, prevention, and health promotion strategies that enable healthy aging.

Housing accessibility problems for people with Parkinson's disease.

Promoting accessible housing for all citizens is high on the political agenda. Knowledge is, however, limited regarding housing accessibility problems for people with Parkinson's disease (PD). The objectives were to investigate housing accessibility problems among people with PD at different stages of disease severity and to analyze the potential impact of improved functional ability on accessibility problems. The study included 253 participants with PD (61% men; mean age 70years). Disease severity was assessed by the Hoehn and Yahr (HY) I-V stages: HY I, n=50; II, n=73, III, n=66; IV-V, n=64. Using the Housing Enabler (HE) instrument, accessibility problems were investigated by combining assessments of the person's functional capacity with assessments of physical barriers in the housing environment into a person-environment fit measure (HE-score). To analyze potential impact of improved functional ability on housing accessibility problems, data simulation was applied. HE-scores differed significantly (P<.001) in relation to HY stages. Overall balance problems explained 22% and walking devices 17% of the HE-scores, whereas environmental barriers contributed to a lesser extent. The environmental barriers generating the most HE-scores were "no grab bar at shower/bath/toilet" and "wall-mounted cupboards and shelves placed high". A simulation of improved balance significantly (P<.001) lowered the HE-scores in all HY stages. The results suggest that actions targeting balance problems and dependence on walking devices have the greatest potential for reducing housing accessibility problems for people with PD. The study also details environmental barriers that need specific attention when providing housing adaptation services.

Promoting supported ambulation in persons with advanced Alzheimer’s disease: a pilot study

Purpose: This study assessed the effects of an intervention program, which combined the use of a walker with assistive technology, on the ambulation and indices of positive involvement of persons with advanced Alzheimer’s disease. A social validation assessment of the program was also carried out.Method: The study included 10 participants with moderate to severe Alzheimer’s disease and inability to walk independently. During baseline, the participants sat in their chair or were provided with a walker. During the intervention, the participants were provided with the walker and assistive technology, which delivered (a) preferred stimulation contingent on step responses and (b) encouragements to ambulate if needed.Results: The participants’ mean step frequencies were between 17 and 45 per session during the baseline and between 83 and 127 per session during the intervention. Sessions lasted 3 min. Most participants also had an increase in indices of positive involvement during the intervention sessions, thus showing an interest in those sessions. The social validation assessment showed that staff personnel rated the program favorably.Conclusions: A program combining the use of a walker with assistive technology may be a practical resource for improving ambulation and positive involvement of persons with advanced Alzheimer’s disease.Implications for rehabilitationA program based on relatively simple technology combined to a walker device may support ambulation in participants with advanced Alzheimer’s disease who are no longer able to walk independently.The same program may also help increase the indices of positive involvement (i.e., improve the general attention/activity and mood) of most participants.The staff’s positive ratings of the program suggest that there may be a favorable attitude toward the acceptance and application of the program in daily contexts.

Importance of independent sit-to-stand ability in ambulatory patients with spinal cord injury.

Sit-to-stand (STS) is an important and basic activity for daily living. However, a few studies have reported information relating to STS ability in ambulatory patients with spinal cord injury (SCI). To investigate factors associated with the ability of independent sit-to-stand (iSTS) among ambulatory patients with SCI. Cross-sectional cohort study. Inpatient tertiary rehabilitation center and communities. Ambulatory patients with SCI. Sixty-nine independent ambulatory individuals with SCI who walked with or without a walking device were cross-sectionally interviewed and assessed for their demographics, SCI characteristics, iSTS ability (pass or fail), types of walking device used, balance ability, and lower limb support capability during STS. Forty-six subjects (67%) successfully performed iSTS ability (pass). The ability of iSTS was significantly associated with lower extremity muscle strength, lower limb support ability, balance control, and ability of walking with a single cane and without a walking device (P<0.01). The ability of iSTS is important for ambulatory patients with SCI as it related to ability of walking with minimal use of the upper extremities. Other significant associated factors provided important clue to promote ability of iSTS. The findings imply the use of iSTS ability as a simple and practical screening or monitoring tool for the ability of walking at least with a single cane. The improvement of lower extremity muscle strength, lower limb support ability, and balance control could improve iSTS ability of these individuals.

A functional electrical stimulation system for human walking inspired by reflexive control principles.

This study presents an innovative multichannel functional electrical stimulation gait-assist system which employs a well-established purely reflexive control algorithm, previously tested in a series of bipedal walking robots. In these robots, ground contact information was used to activate motors in the legs, generating a gait cycle similar to that of humans. Rather than developing a sophisticated closed-loop functional electrical stimulation control strategy for stepping, we have instead utilised our simple reflexive model where muscle activation is induced through transfer functions which translate sensory signals, predominantly ground contact information, into motor actions. The functionality of the functional electrical stimulation system was tested by analysis of the gait function of seven healthy volunteers during functional electrical stimulation–assisted treadmill walking compared to unassisted walking. The results demonstrated that the system was successful in synchronising muscle activation throughout the gait cycle and was able to promote functional hip and ankle movements. Overall, the study demonstrates the potential of human-inspired robotic systems in the design of assistive devices for bipedal walking.

Wearable tubing assistive walking device immediately enhances gait parameters in subjects with stroke: A randomized controlled study.

Stroke patients develop compensatory movements due to limitations of ankle dorsiflexion and knee flexion. To solve the limitations, there are many adjustable walking assistive devices such as robotic devices, ankle-foot orthoses, and functional electric stimulation in rehabilitation session. However, these assistive devices have some disadvantages, including expense and discomforts. Therefore, the development of a new assistive device for stroke patients is needed to assist ankle dorsiflexion and knee flexion. This study investigated the effects of a wearable tubing assistive walking device (WTAWD) on gait parameters (gait speed, cadence, and step length and stride length on affected and less affected sides) in patients with stroke. Gait parameters were measured using the GAITRite system. One-way repeated measures analysis of variance was used to determine gait differences under three conditions (WTAWD, barefoot, and conventional elastic band orthosis). Gait speed, cadence, and step length and stride length on both affected and less affected sides were significantly greater with WTAWD, compared to barefoot and conventional elastic band orthosis conditions. WTAWD could be effective for patients with stroke.

Overground gait training using a motorized assistive device in patients with severe disabilities after stroke.

Regaining of the patient's ability to walk after stroke is an important goal of rehabilitation programmes. The ultimate goal of gait rehabilitation is to empower patients for overground walking. We have previously developed a prototype of a therapist-controlled mobile platform with compliant pelvis support mechanism that enables balance training during overground walking (device E-go). The aim of this pilot randomized controlled study was to explore the usefulness of the E-go in reducing the number of therapists needed during walking training, and to explore the effectiveness of the E-go on walking abilities in severely affected stroke patients. The study included 19 subacute poststroke patients divided into two groups. The experimental group (nine patients) trained to walk with the E-go and the control group trained within conventional physiotherapy programs for 3 weeks. Outcome measures were walking distance and speed, Fugl-Meyer Assessment, Berg Balance Scale, Functional Ambulation Category and the number of therapists needed during training. At the end of the training both groups significantly improved in walking speed, walking distance, Berg Balance Scale and Fugl-Meyer Assessment (P≤0.001), but there were no between-group differences. The experimental group on average needed a lower number of therapists (P=0.040). These findings highlight the potential of the E-go for overground walking training in severely disabled subacute stroke patients.

The Functional Gait Assessment in People with Multiple Sclerosis: Validity and Sensitivity to Change.

Assessments of balance and walking are often performed in rehabilitation of people with multiple sclerosis (MS). The Functional Gait Assessment (FGA) is a test of walking balance including challenging items such as walking with a narrow base of support, with eyes closed, and backward. The aim was to investigate the validity (concurrent, discriminant, and known-groups) and sensitivity to change of the modified FGA in ambulatory individuals with MS. A convenience sample of 87 individuals with MS was included (mean age, 54 years; 79% women). Concurrent and discriminant validity was investigated using tests of dynamic balance and the Multiple Sclerosis Walking Scale and Multiple Sclerosis Impact Scale (MSIS). Known-groups validity was investigated with self-reported number of falls and use of walking devices. Sensitivity to change was investigated with data from a group balance training study. The median FGA score was 15 (range, 1-26). Concurrent validity with tests of dynamic balance was moderate to strong, with the Timed Up and Go test having the highest correlation coefficient (rho = -0.74). Discriminant validity was shown with a low correlation coefficient with the MSIS psychological subscale (rho = 0.14). The FGA scores differed significantly for users of walking devices versus nonusers but not for reported falls. Sensitivity to change was moderate to low. The FGA is a valid measure of balance during walking in people with MS, but further investigation is required for the ability to detect people at risk for falls.

The effectiveness of Robot-Assisted Gait Training versus conventional therapy on mobility in severely disabled progressIve MultiplE sclerosis patients (RAGTIME): study protocol for a randomized controlled trial

BackgroundGait and mobility impairments affect the quality of life (QoL) of patients with progressive multiple sclerosis (MS). Robot-assisted gait training (RAGT) is an effective rehabilitative treatment but evidence of its superiority compared to other options is lacking. Furthermore, the response to rehabilitation is multidimensional, person-specific and possibly involves functional reorganization processes. The aims of this study are: (1) to test the effectiveness on gait speed, mobility, balance, fatigue and QoL of RAGT compared to conventional therapy (CT) in progressive MS and (2) to explore changes of clinical and circulating biomarkers of neural plasticity.MethodsThis will be a parallel-group, randomized controlled trial design with the assessor blinded to the group allocation of participants. Ninety-eight (49 per arm) progressive MS patients (EDSS scale 6–7) will be randomly assigned to receive twelve 2-h training sessions over a 4-week period (three sessions/week) of either: (1) RAGT intervention on a robotic-driven gait orthosis (Lokomat, Hocoma, Switzerland). The training parameters (torque of the knee and hip drives, treadmill speed, body weight support) are set during the first session and progressively adjusted during training progression or (2) individual conventional physiotherapy focusing on over-ground walking training performed with the habitual walking device. The same assessors will perform outcome measurements at four time points: baseline (before the first intervention session); intermediate (after six training sessions); end of treatment (after the completion of 12 sessions); and follow-up (after 3 months from the end of the training program). The primary outcome is gait speed, assessed by the Timed 25-Foot Walk Test. We will also assess walking endurance, balance, depression, fatigue and QoL as well as instrumental laboratory markers (muscle metabolism, cerebral venous hemodynamics, cortical activation) and circulating laboratory markers (rare circulating cell populations pro and anti-inflammatory cytokines/chemokines, growth factors, neurotrophic factors, coagulation factors, other plasma proteins suggested by transcriptomic analysis and metabolic parameters).DiscussionThe RAGT training is expected to improve mobility compared to the active control intervention in progressive MS. Unique to this study is the analysis of various potential markers of plasticity in relation with clinical outcomes.Trial registrationClinicalTrials.gov, identifier: NCT02421731. Registered on 19 January 2015 (retrospectively registered).

Sensitively Humidity‐Driven Actuator Based on Photopolymerizable PEG‐DA Films

Hydrogels such as poly(ethylene glycol) diacrylate are a class of cross‐linked polymers that have the ability to absorb water and change volume. Here, a humidity responsiveness of hydrogel film fabricated by the photopolymerization of poly(ethylene glycol) diacrylate (PEG‐DA) monomer is reported. This kind of film could be driven by a small humidity gradient, thus spontaneous deformation and motion can be achieved by placing the film onto a moist filter paper. The influence factors of humidity response sensitivity such as the exposure time and number‐average molecular weight of PEG‐DA monomer used during the fabrication are investigated. Under different relative humidity, the film displays different degrees of pink color and the intensities of fluorescence under 365 nm illumination are also different, which renders the film to be used as a “humidity test strip.” A humidity‐driven walking device is fabricated and the walking velocity is about 3 mm min−1 under the actuating water vapor. Vapor of volatile polar solvents could also drive the actuator to achieve fast deformation and shows the variety of the film responsivity.