Inner and outer layer pressure sensing system and method for firefighter gloves

Abstract

The invention relates to the field of intelligent wearable equipment, and discloses an inner and outer layer pressure sensing system and method of a fireman glove, and the system comprises an inner layer thin film pressure sensor array glove which comprises an inner layer glove and a plurality of thin film pressure sensors, a plurality of thin film pressure sensors are arranged on the inner and outer sides of fingertips, finger prominences, palm centers, first web, hand backs, finger seams, wrists and finger joints of the fingers of the inner layer glove, and are used for measuring the contact pressure between the hand and the glove in real time; the outer-layer film pressure sensor array glove comprises an outer-layer glove and a plurality of film pressure sensors, and the film pressure sensors are arranged on the hand back, the wrist and the fingertips of the outer-layer glove and used for measuring the contact pressure between the glove and the external environment; the thin film pressure sensors on the inner layer glove and the outer layer glove are connected to a transceiver in a wired manner for data acquisition; the data collected by the transceiver is transmitted to the cloud platform through wireless communication; and finally, performing performance evaluation according to the data in the cloud platform, and outputting an evaluation result.

Description

Technical Field

[0001] The present invention relates to the field of intelligent wearable devices, and in particular to a system and method for sensing the inner and outer layer pressure of firefighter gloves. Background Art

[0002] As the working environment of firefighters continues to change and the intensity of work increases, it is particularly important for firefighters to protect their hands when performing firefighting and rescue tasks. As part of personal protective equipment (PPE), firefighter gloves play a key role in protecting firefighters' hands in dangerous environments with high temperatures, moisture, and chemicals. The performance of gloves directly affects the operating ability and safety of firefighters, so a comprehensive evaluation of the performance of firefighter gloves is crucial to improving the safety and functionality of the equipment.

[0003] At present, the performance evaluation of most firefighter gloves on the market mainly relies on manual experience and simple physical testing methods. The evaluation dimensions are relatively single and lack comprehensive, multi-dimensional quantitative evaluation methods. Traditional evaluation methods usually only focus on the comfort and durability of gloves, while ignoring the comprehensive consideration of important indicators such as pressure transmission, flexibility, mechanical transmission performance, and environmental adaptability of gloves during actual use. In addition, the existing glove evaluation methods are also difficult to monitor the changes in contact pressure between the hand and the glove and its interaction with the external environment in real time, and cannot effectively simulate the pressure distribution and hand activities in actual use scenarios, resulting in deviations in the evaluation results and unable to fully reflect the performance of firefighter gloves in extreme environments.

[0004] Therefore, there is an urgent need for a new type of inner and outer pressure sensing system and method for firefighter gloves, which can measure the contact pressure between the hand and the glove, as well as the contact pressure between the glove and the external environment in real time and accurately, and comprehensively evaluate the multi-dimensional performance of the gloves through a comprehensive evaluation algorithm, so as to provide more scientific data support for the design, manufacture and optimization of firefighter gloves. Such a system and method can not only improve the comfort and flexibility of firefighters' hands, but also effectively improve the adaptability and durability of gloves in extreme environments of high temperature, low temperature and humidity. Summary of the invention

[0005] The purpose of the present invention is to provide a system and method for sensing the inner and outer layer pressure of firefighter gloves. Through precise pressure sensing and data processing methods, the multi-dimensional performance of firefighter gloves can be comprehensively evaluated, and the contact pressure between the hand and the glove, and the contact pressure between the glove and the external environment can be measured in real time and accurately, and the glove performance can be quantitatively evaluated based on a comprehensive evaluation method.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A firefighter glove inner and outer layer pressure sensing system, comprising:

[0008] The inner layer thin film pressure sensor array glove comprises an inner layer glove and a plurality of thin film pressure sensors, wherein the plurality of thin film pressure sensors are arranged on the fingertips, finger webs, palms, base of thumb, back of hand, finger joints, wrists and inner and outer sides of finger joints of the inner layer glove; and are used for real-time measurement of the contact pressure between the hand and the glove;

[0009] An outer layer thin film pressure sensor array glove comprises an outer layer glove and a plurality of thin film pressure sensors, wherein the plurality of thin film pressure sensors are arranged on the back of the hand, the wrist and the fingertips of the outer layer glove; and are used to measure the contact pressure between the glove and the external environment;

[0010] Data acquisition module, the thin film pressure sensors on the inner glove and the outer glove are connected to an external transceiver via wires for data acquisition;

[0011] A data storage module, used to transmit the data collected by the transceiver to the cloud platform in real time via wireless communication;

[0012] The data analysis module is used to perform performance evaluation based on the data in the cloud platform and output the evaluation results.

[0013] As a further technical solution, the process of performance evaluation based on the data in the cloud platform is as follows:

[0014] Based on the data collected in the cloud platform, the comprehensive score of each dimension is calculated according to multiple dimensions:

[0015] Then substitute the calculated comprehensive score of each dimension into the formula:

[0016]

[0017] Calculate the comprehensive performance score R overall ;

[0018] Among them, ω dimension,j is the weight coefficient of the jth dimension, R dimension,j is the comprehensive score of the jth dimension, and n is the total number of dimensions.

[0019] As a further technical solution, the dimensions and corresponding indicators include:

[0020] Flexibility indicators, including finger bending angle, minimum grasping object diameter, dynamic pressure change curve, touch success rate, and bending resistance, are used to evaluate the impact of gloves on hand movement freedom and fine manipulation ability;

[0021] Mechanical transfer performance indicators, including force transfer efficiency, force transfer uniformity, area transfer ratio, fit performance indicators, fit pressure uniformity, pressure range, fingertip fit ability, and long-term fit stability, are used to quantify the efficiency and uniformity of gloves in the force transfer process;

[0022] Environmental adaptability performance indicators, including temperature-pressure coupling analysis, thermal expansion effect, and extreme environment operation capability, are used to test the performance of gloves in extreme environments;

[0023] Durability indicators, including dexterity decay rate, dynamic response decay, and wear area analysis, are used to evaluate the performance decay of gloves after long-term use.

[0024] As a further technical solution, the method for obtaining the flexibility index includes:

[0025] The maximum bending angle of the finger when wearing gloves is recorded by an angle measuring device and compared with the angle when not wearing gloves. The expression is: Δθ=|θ1-θ0|; Δθ is the bending angle difference, θ1 is the maximum bending angle when wearing gloves, and θ0 is the maximum bending angle when not wearing gloves;

[0026] Firefighters wearing gloves try to grab cylindrical objects of different diameters in turn, and record the minimum diameter d that can be successfully grabbed. min ;

[0027] The dynamic pressure change curve is measured by placing a pressure sensor inside the glove to record the change of pressure value over time during the finger bending or grasping action, and extract relevant data for analysis; the expression is: V p is the pressure rise rate, t max is the moment when the pressure reaches its peak value, p(t max ) is the time t max The corresponding pressure value, t0 is the starting time, and p(t0) is the pressure value corresponding to the starting time t0;

[0028] By completing the task of touching the thumb and other fingers in sequence within a limited time, the ratio of the number of successes to the total number of attempts is recorded, and the expression is: R is the touch success rate, n s is the number of successes, n c is the total number of attempts;

[0029] The torque value required in the process of bending the finger is recorded by the torque device, and the torque difference ΔM between wearing gloves and not wearing gloves is calculated. The expression is: ΔM=|M1-M0|; M1 is the maximum torque value required in the process of bending the finger when wearing gloves, and M0 is the maximum torque value required in the process of bending the finger when not wearing gloves;

[0030] Each parameter was processed by data normalization;

[0031] Substituting into the formula again:

[0032] R dimension,j =R dimension,1 =μ4R-μ1Δθ-μ2d min -μ3V p -μ5ΔM;

[0033] Calculate the comprehensive score R of the flexibility index dimension,1 ; μ1, μ2, μ3, μ4, μ5 are weight coefficients.

[0034] As a further technical solution, the method for obtaining the mechanical transfer performance index includes:

[0035] Apply force through the internal pressure sensor and record the total force F felt by the internal sensor in and the total force F transmitted to the outside recorded by the external sensor out , and calculate the force transmission efficiency ρ according to the formula, the expression is:

[0036] The pressure distribution in the stress area is recorded by an external pressure sensor, and the standard deviation XD of the external pressure distribution is calculated w With the mean Ratio as force transmission uniformity k w , the expression is:

[0037] Apply pressure inside and record that the internal sensor pressure is greater than a certain threshold A th The area of ​​the region Y c and the external sensor pressure is greater than the same threshold A th The area of ​​the region Y s , and calculate the area transfer ratio r; the expression is:

[0038] Each parameter was processed by data normalization;

[0039] Substituting into the formula again:

[0040] R dimension,j =R dimension,2 =τ1ρ-τ2k w +τ3r+τ4h;

[0041] Calculate the comprehensive score R of the flexibility index dimension,1 ; τ1, τ2, τ3, τ4 are weight coefficients, and h is the fitting performance index.

[0042] As a further technical solution, the method for obtaining the fitting performance index h includes:

[0043] By placing internal pressure sensors on the palm and fingers, the contact pressure data is recorded and the standard deviation XD0 and mean of the pressure distribution are calculated. The ratio is taken as the bonding pressure uniformity k0;

[0044] Record the pressure data of the internal sensor and calculate the maximum pressure P max With the minimum value P min The difference is expressed as: ΔP = P max -P min ; ΔP is the pressure range;

[0045] Place pressure sensors at the fingertips of the gloves to record the total pressure P in the fingertip area. sam , and calculate the fingertip fit G; the expression is: P ref is the theoretical value of the total pressure in the fingertip area;

[0046] The curve p(t i ), calculate the fluctuation amplitude Z of the fitting pressure; the expression is is the mean value of internal pressure;

[0047] Each parameter is processed by data standardization; then by the formula:

[0048]

[0049] The fitting performance index h is calculated; δ1, δ2, δ3, and δ4 are weight factors.

[0050] As a further technical solution, the method for obtaining the environmental adaptation performance index includes:

[0051] Place the glove in a set temperature environment, record the pressure distribution data of the internal pressure sensor, and calculate the pressure distribution change rate q p ; The expression is: 100%; is the mean internal pressure at room temperature, is the mean internal pressure at set temperature;

[0052] Record the fitting pressure range at different temperatures and calculate the pressure range difference Δq at different temperatures p ; The expression is: Δq p =|ΔP 01 -ΔP 02 |ΔP 02is the pressure range at room temperature, ΔP 01 is the pressure range at the set temperature;

[0053] Firefighters wear gloves to complete specific tasks in extreme environments, record the task completion time and success rate, and calculate the relative change compared with normal temperature conditions; the relative change rate of task completion time q T The expression is: T1 is the time to complete a specific task in an extreme environment, and T0 is the time to complete a specific task at normal temperature;

[0054] The relative change rate of success rate q e By formula: Calculated; e1 is the success rate of completing a specific task in an extreme environment, and e0 is the success rate of completing a specific task at normal temperature;

[0055] As a further technical solution, the method for obtaining the durability index includes:

[0056] Firefighters wore gloves and performed repeated actions. The dexterity scores at the initial test and after the operation were recorded, and the dexterity decay rate (R dimension,1 ) a ; The expression is:

[0057]

[0058] R dimension,1 is the overall flexibility score of the initial test, R′ dimension,1 Provide an overall score for flexibility after the operation;

[0059] Dynamic response attenuation measurement, record the pressure response time change after repeated operation, and calculate the dynamic response attenuation rate (T f ) a ; The expression is is the pressure response time after repeated operation, T f is the initial pressure response time;

[0060] The measurement of wear area analysis records the pressure distribution data of the stress area through an external pressure sensor, and compares the pressure distribution in the initial state to analyze the pressure attenuation of the wear area; the expression is: ΔP β =|P ini -P end |;P ini is the average pressure of the wear area in the initial state, P end ΔP is the average pressure in the wear area after a period of use. β is the change in pressure bearing capacity of the worn part.

[0061] As a further technical solution, the process of data standardization is:

[0062] By standardizing the formula:

[0063]

[0064] Get the standardized value of each parameter R′ i ;

[0065] Among them, R i is the actual value of each parameter, R max,i and R min,i are the maximum and minimum values ​​of each parameter respectively.

[0066] As a further technical solution, the evaluation result output forms include:

[0067] Radar chart, which intuitively displays the performance of gloves in multiple dimensions;

[0068] Heat map, which visualizes the changes in pressure distribution of the glove under different actions or experimental conditions;

[0069] Comprehensive performance score, showing the overall performance of the glove.

[0070] Beneficial effects of the present invention:

[0071] (1) High precision and real-time performance: The thin-film piezoelectric sensor and pressure resistance sensor are used to perform high-precision measurements within different pressure ranges, and real-time data is acquired through Bluetooth wireless transmission to ensure the real-time and stability of the measurement.

[0072] (2) Multi-dimensional evaluation: Through a comprehensive evaluation algorithm, the flexibility, mechanical properties, fit, environmental adaptability and durability of gloves are taken into consideration to comprehensively evaluate glove performance, providing a scientific data basis for glove design, optimization and selection.

[0073] (3) Adaptability to extreme environments: The inner and outer pressure sensor arrays are designed to be suitable for various extreme environments, ensuring stable operation under high temperature, low temperature, and humid conditions, and can accurately measure the performance of the gloves under these conditions.

[0074] (4) Comfort and durability: The choice of inner and outer glove materials ensures wearing comfort and durability without affecting the accuracy and stability of the pressure sensor.

[0075] (5) Convenient user experience: Data is wirelessly transmitted to the host computer via Bluetooth. Users can quickly understand the comprehensive performance score of the gloves through visual charts and make corresponding optimizations or improvements. The present invention can effectively improve the performance evaluation accuracy of firefighter gloves, enhance the comfort and safety of firefighters' hands, and provide a scientific basis for the research and development and optimization of gloves. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] The present invention will be further described below in conjunction with the accompanying drawings.

[0077] Figure 1 It is a system structure block diagram of the present invention. DETAILED DESCRIPTION

[0078] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0079] See also Figure 1 As shown, the present invention is an inner and outer layer pressure sensing system of firefighter gloves, comprising:

[0080] The inner layer thin film pressure sensor array glove comprises an inner layer glove and a plurality of thin film pressure sensors, wherein the plurality of thin film pressure sensors are arranged on the fingertips, finger webs, palms, base of thumb, back of hand, finger joints, wrists and inner and outer sides of finger joints of the inner layer glove; and are used for real-time measurement of the contact pressure between the hand and the glove;

[0081] An outer layer thin film pressure sensor array glove comprises an outer layer glove and a plurality of thin film pressure sensors, wherein the plurality of thin film pressure sensors are arranged on the back of the hand, the wrist and the fingertips of the outer layer glove; and are used to measure the contact pressure between the glove and the external environment;

[0082] Data acquisition module, the thin film pressure sensors on the inner glove and the outer glove are connected to an external transceiver via wires for data acquisition;

[0083] A data storage module, used to transmit the data collected by the transceiver to the cloud platform in real time via wireless communication;

[0084] The data analysis module is used to perform performance evaluation based on the data in the cloud platform and output the evaluation results.

[0085] The thin film pressure sensors used include thin film piezoelectric sensors and pressure resistance sensors, which can accurately measure the pressure range from 0.1N to 1000N and have a spatial resolution of at least 0.5mm, ensuring high-precision real-time monitoring. The materials of the inner and outer gloves are elastic fabrics and wear-resistant materials to ensure comfort after long-term wear and the stability of the sensors.

[0086] The process of performance evaluation based on the data in the cloud platform is as follows:

[0087] Based on the data collected in the cloud platform, the comprehensive score of each dimension is calculated according to multiple dimensions:

[0088] Then substitute the calculated comprehensive score of each dimension into the formula:

[0089]

[0090] Calculate the comprehensive performance score R overal ;

[0091] Among them, ω dimension,j is the weight coefficient of the jth dimension, R dimension,j is the comprehensive score of the jth dimension, and n is the total number of dimensions. σ dimension,j is the degree of dispersion of the j-th dimension, i.e., the standard deviation;

[0092] The dimensions and corresponding indicators include:

[0093] Flexibility indicators, including finger bending angle, minimum grasping object diameter, dynamic pressure change curve, touch success rate, and bending resistance, are used to evaluate the impact of gloves on hand movement freedom and fine manipulation ability;

[0094] Mechanical transfer performance indicators, including force transfer efficiency, force transfer uniformity, area transfer ratio, fit performance indicators, fit pressure uniformity, pressure range, fingertip fit ability, and long-term fit stability, are used to quantify the efficiency and uniformity of gloves in the force transfer process;

[0095] Environmental adaptability performance indicators, including temperature-pressure coupling analysis, thermal expansion effect, and extreme environment operation capability, are used to test the performance of gloves in extreme environments;

[0096] Durability indicators, including dexterity decay rate, dynamic response decay, and wear area analysis, are used to evaluate the performance decay of gloves after long-term use.

[0097] The comprehensive evaluation method of the present invention is based on the pressure data collected from the inner and outer layer pressure sensor arrays, and calculates the comprehensive performance score through standardized processing and weighted average data processing methods. The evaluation index system covers multiple dimensions of flexibility, mechanical transmission performance, fit, environmental adaptability and durability; the performance of the gloves is comprehensively evaluated in multiple dimensions, the pressure data of each dimension is standardized, the weight of each evaluation index is calculated based on experimental data, and a unified comprehensive performance score is generated. The data processing method adopts dynamic weight allocation, and the weight is automatically adjusted according to the discreteness (such as standard deviation or) of each evaluation index to ensure the scientificity and accuracy of the evaluation result; finally, the comprehensive scoring result is intuitively displayed in the form of radar charts and heat maps, so that the evaluation results of each dimension are easy to understand and compare. Through graphical display, users can clearly see the performance differences of the gloves in various performance indicators, thereby providing data support for the optimization and improvement of the gloves.

[0098] The method for obtaining the flexibility index includes:

[0099] The maximum bending angle of the finger when wearing gloves is recorded by an angle measuring device and compared with the angle when not wearing gloves. The expression is: Δθ=|θ1-θ0|; Δθ is the bending angle difference, θ1 is the maximum bending angle when wearing gloves, and θ0 is the maximum bending angle when not wearing gloves;

[0100] Firefighters wearing gloves try to grab cylindrical objects of different diameters in turn, and record the minimum diameter d that can be successfully grabbed. min ;

[0101] The dynamic pressure change curve is measured by placing a pressure sensor inside the glove to record the change of pressure value over time during the finger bending or grasping action, and extract relevant data for analysis; the expression is: V p is the pressure rise rate, t max is the moment when the pressure reaches its peak value, p(t max ) is the time t max The corresponding pressure value, t0 is the starting time, and p(t0) is the pressure value corresponding to the starting time t0;

[0102] By completing the task of touching the thumb and other fingers in sequence within a limited time, the ratio of the number of successes to the total number of attempts is recorded, and the expression is: R is the touch success rate, n s is the number of successes, n c is the total number of attempts;

[0103] The torque value required in the process of bending the finger is recorded by the torque device, and the torque difference ΔM between wearing gloves and not wearing gloves is calculated. The expression is: ΔM=|M1-M0|; M1 is the maximum torque value required in the process of bending the finger when wearing gloves, and M0 is the maximum torque value required in the process of bending the finger when not wearing gloves;

[0104] Each parameter was processed by data normalization;

[0105] Substituting into the formula again:

[0106] R dimension,j =R dimension,1 =μ4R-μ1Δθ-μ2d min -μ3V p -μ5ΔM;

[0107] Calculate the comprehensive score R of the flexibility index dimension,1 ; μ1, μ2, μ3, μ4, μ5 are weight coefficients, each weight coefficient is based on the corresponding parameter Make automatic adjustments.

[0108] The method for obtaining the mechanical transmission performance index includes:

[0109] Apply force through the internal pressure sensor and record the total force F felt by the internal sensor in and the total force F transmitted to the outside recorded by the external sensor out , and calculate the force transmission efficiency ρ according to the formula, the expression is:

[0110] The pressure distribution in the stress area is recorded by an external pressure sensor, and the standard deviation XD of the external pressure distribution is calculated w With the mean Ratio as force transmission uniformity k w , the expression is:

[0111] Apply pressure inside and record that the internal sensor pressure is greater than a certain threshold A th The area of ​​the region Y c and the external sensor pressure is greater than the same threshold A th The area of ​​the region Y s , and calculate the area transfer ratio r; the expression is:

[0112] Each parameter was processed by data normalization;

[0113] Substituting into the formula again:

[0114] R dimension,j =R dimension,2 =τ1ρ-τ2kw +τ3r+τ4h;

[0115] Calculate the comprehensive score R of the flexibility index dimension,1 ; τ1, τ2, τ3, τ4 are weight coefficients, each weight coefficient is based on the corresponding parameter Automatic adjustment is performed, and h is the fitting performance index.

[0116] The method for obtaining the fitting performance index h includes:

[0117] By placing internal pressure sensors on the palm and fingers, the contact pressure data is recorded and the standard deviation XD0 and mean of the pressure distribution are calculated. The ratio is taken as the bonding pressure uniformity k0;

[0118] Record the pressure data of the internal sensor and calculate the maximum pressure P max With the minimum value P min The difference is expressed as: ΔP = P max -P min ; ΔP is the pressure range;

[0119] Place pressure sensors at the fingertips of the gloves to record the total pressure P in the fingertip area. sam , and calculate the fingertip fit G; the expression is: P ref is the theoretical value of the total pressure in the fingertip area;

[0120] The curve p(t i ), calculate the fluctuation amplitude Z of the fitting pressure; the expression is is the mean value of internal pressure;

[0121] Each parameter is processed by data standardization; then by the formula:

[0122]

[0123] The fitting performance index h is calculated; δ1, δ2, δ3, δ4 are weight factors, each weight factor is based on the corresponding parameter Make automatic adjustments.

[0124] The method for obtaining the environmental adaptation performance index includes:

[0125] Place the glove in a set temperature environment, record the pressure distribution data of the internal pressure sensor, and calculate the pressure distribution change rate q p ; The expression is: is the mean internal pressure at room temperature, is the mean internal pressure at set temperature;

[0126] Record the fitting pressure range at different temperatures and calculate the pressure range difference Δq at different temperatures p ; The expression is: Δq p =|ΔP 01 -ΔP 02 |ΔP 02 is the pressure range at room temperature, ΔP 01 is the pressure range at the set temperature;

[0127] Firefighters wear gloves to complete specific tasks in extreme environments, record the task completion time and success rate, and calculate the relative change compared with normal temperature conditions; the relative change rate of task completion time q T The expression is: T1 is the time to complete a specific task in an extreme environment, and T0 is the time to complete a specific task at normal temperature;

[0128] The relative change rate of success rate q e By formula: Calculated; e1 is the success rate of completing a specific task in an extreme environment, and e0 is the success rate of completing a specific task at normal temperature;

[0129] The method for obtaining the durability index includes:

[0130] Firefighters wore gloves and performed repeated actions. The dexterity scores at the initial test and after the operation were recorded, and the dexterity decay rate (R dimension,1 ) a ; The expression is:

[0131]

[0132] R dimension,1 is the overall flexibility score of the initial test, R′ dimension,1 Provide an overall score for flexibility after the operation;

[0133] Dynamic response attenuation measurement, record the pressure response time change after repeated operation, and calculate the dynamic response attenuation rate (T f ) a ; The expression is is the pressure response time after repeated operation, T f is the initial pressure response time;

[0134] The measurement of wear area analysis records the pressure distribution data of the stress area through an external pressure sensor, and compares the pressure distribution in the initial state to analyze the pressure attenuation of the wear area; the expression is: ΔP β =|P ini -P end |;P ini is the average pressure of the wear area in the initial state, P end ΔP is the average pressure in the wear area after a period of use. β is the change in pressure bearing capacity of the worn part.

[0135] The process of data standardization is as follows:

[0136] By standardizing the formula:

[0137]

[0138] Get the standardized value of each parameter R′ i ;

[0139] Among them, R i is the actual value of each parameter, R max,i and R min,i are the maximum and minimum values ​​of each parameter respectively.

[0140] The evaluation result output forms include:

[0141] Radar chart, which intuitively displays the performance of gloves in multiple dimensions;

[0142] Heat map, which visualizes the changes in pressure distribution of the glove under different actions or experimental conditions;

[0143] Comprehensive performance score, showing the overall performance of the glove.

[0144] 1. System Configuration

[0145] In this embodiment, the firefighter glove inner and outer layer pressure sensing system used includes:

[0146] (1) Inner layer thin film pressure sensor array gloves: The inner layer gloves are equipped with multiple thin film pressure sensors. The sensors are arranged on the fingertips, fingertips, palms, base of the thumb, back of the hand, finger joints, wrists and inner and outer sides of finger joints to measure the contact pressure between the hand and the glove in real time.

[0147] (2) Outer layer thin film pressure sensor array gloves: The outer layer gloves are also equipped with multiple thin film pressure sensors, which are arranged in key areas such as the back of the hand, wrist, and fingertips to measure the contact pressure between the gloves and the external environment such as tools and fire sources.

[0148] These inner and outer pressure sensor arrays are connected to an external data transceiver via wires. The transceiver is responsible for real-time data collection and transmission to a host computer for analysis via Bluetooth wireless technology.

[0149] 2. Experimental Design

[0150] In order to verify the effectiveness of the device and method of the present invention, we designed a series of experiments to evaluate the performance of firefighter gloves in different environments. The experimental process is as follows:

[0151] (1) Experimental environment preparation:

[0152] The experiments were carried out under standard temperature (25°C), high temperature (100°C) and low temperature (-20°C) environments.

[0153] Using firefighter glove samples, the test was conducted using an inner and outer layer pressure sensor glove system.

[0154] (2) Wear gloves:

[0155] The experimenter first puts on the inner pressure sensor glove, then the firefighter gloves to be tested, and finally the outer pressure sensor glove. The sensors of each layer of gloves are connected to an external transceiver to collect data in real time.

[0156] (3) Action simulation:

[0157] The experimenters simulated the actions of firefighters in firefighting and rescue missions, including grabbing objects, bending fingers, and clenching fists, and recorded the pressure changes on the hands and gloves under different actions.

[0158] At the same time, the pressure changes of the gloves in high and low temperature environments are recorded to ensure the evaluation of the gloves' adaptability under extreme conditions.

[0159] 3. Data collection and transmission

[0160] During the entire experiment, the inner and outer pressure sensor arrays continuously monitor pressure changes and connect the data to an external data transceiver via a cable. The data transceiver transmits the collected pressure data to the host computer in real time.

[0161] The host computer receives data via Bluetooth and performs preliminary processing, including noise removal, standardization, and data cleaning.

[0162] 4. Data processing and comprehensive evaluation

[0163] Data standardization: The data collected by each sensor is standardized to make the data under different experimental conditions comparable and eliminate dimensional differences.

[0164] Weighted average method: Based on the weight of each performance dimension, such as flexibility, mechanical properties, and fit, the comprehensive performance score is calculated by weighted average method. The weight of each evaluation dimension is automatically adjusted by analyzing the discreteness of each dimension (such as standard deviation) to ensure the accuracy of the evaluation results.

[0165] The comprehensive scoring formula is as follows:

[0166]

[0167] Among them, R overall is the overall comprehensive score, ω dimension,j is the dimension weight, R dimension,j A comprehensive score for each dimension;

[0168] Evaluation output: Finally, the comprehensive performance score is visualized in the form of radar charts and heat maps. The radar chart shows the scores of the gloves in terms of flexibility, mechanical properties, and fit, while the heat map shows the changes in pressure distribution under different movements and environmental conditions.

[0169] 5. Evaluate the results

[0170] Based on the experimental results, the following comprehensive performance scores are generated:

[0171] Dexterity: In high temperature environments, the dexterity score of the gloves decreases slightly, but remains high at normal temperatures, indicating that the gloves can still maintain a certain degree of operational freedom under high temperature conditions.

[0172] Mechanical transfer performance: When grasping objects and making fists, the gloves performed well in force transfer efficiency and uniformity, and received high scores.

[0173] Fit: The fit score of the gloves is stable in all environments, especially in low temperature conditions, the fingertips of the gloves still have good fit and maintain high comfort.

[0174] Environmental adaptability: The gloves have good adaptability in high and low temperature environments. Temperature-pressure coupling analysis shows that the gloves can effectively adapt to temperature changes and maintain relatively stable pressure transmission performance.

[0175] Durability: After repeated operations, the gloves have a low rate of dexterity decay, indicating good durability.

[0176] Comprehensive score: The comprehensive performance score of the gloves in all dimensions is 85%, indicating that the firefighter gloves have excellent performance in various extreme environments.

[0177] 6. Summary

[0178] This embodiment demonstrates how to use the inner and outer pressure sensing device of the firefighter gloves and the data processing algorithm of the present invention to evaluate the performance of the gloves under different environmental and task conditions. Through the inner and outer pressure sensor array and the comprehensive evaluation algorithm, the present invention can provide accurate and real-time glove performance evaluation, providing a scientific basis for the optimization and improvement of the gloves.

[0179] The results of this embodiment show that the system and algorithm of the present invention can effectively measure the multi-dimensional performance of gloves, helping to improve the safety, comfort and durability of firefighter gloves.

[0180] The record table of each evaluation index in the present invention is shown in Table 1 below:

[0181]

[0182]

[0183]

[0184] Table 1

[0185] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A firefighter glove inner and outer layer pressure sensing system, characterized in that: include: An inner layer thin film pressure sensor array glove comprises an inner layer glove and a plurality of thin film pressure sensors, wherein the plurality of thin film pressure sensors are arranged on the fingertips, finger webs, palms, bases of the thumb, backs of the hands, finger joints, wrists and inner and outer sides of finger joints of the inner layer glove; Used to measure the contact pressure between hand and glove in real time; An outer layer thin film pressure sensor array glove comprises an outer layer glove and a plurality of thin film pressure sensors, wherein the plurality of thin film pressure sensors are arranged on the back of the hand, the wrist and the fingertips of the outer layer glove; Used to measure the contact pressure between the glove and the external environment; Data acquisition module, the thin film pressure sensors on the inner glove and the outer glove are connected to an external transceiver via wires for data acquisition; A data storage module, used to transmit the data collected by the transceiver to the cloud platform in real time via wireless communication; The data analysis module is used to perform performance evaluation based on the data in the cloud platform and output the evaluation results.

2. The inner and outer layer pressure sensing system of firefighter gloves according to claim 1, characterized in that: The process of performance evaluation based on the data in the cloud platform is as follows: Based on the data collected in the cloud platform, the comprehensive score of each dimension is calculated according to multiple dimensions: Then substitute the calculated comprehensive score of each dimension into the formula: Calculate the comprehensive performance score R overal ; Among them, ω dimension,j is the weight coefficient of the jth dimension, R dimension,j is the comprehensive score of the jth dimension, and n is the total number of dimensions.

3. The inner and outer layer pressure sensing system of firefighter gloves according to claim 2, characterized in that: The dimensions and corresponding indicators include: Flexibility indicators, including finger bending angle, minimum grasping object diameter, dynamic pressure change curve, touch success rate, and bending resistance, are used to evaluate the impact of gloves on hand movement freedom and fine manipulation ability; Mechanical transfer performance indicators, including force transfer efficiency, force transfer uniformity, area transfer ratio, fit performance indicators, fit pressure uniformity, pressure range, fingertip fit ability, and long-term fit stability, are used to quantify the efficiency and uniformity of gloves in the force transfer process; Environmental adaptability performance indicators, including temperature-pressure coupling analysis, thermal expansion effect, and extreme environment operation capability, are used to test the performance of gloves in extreme environments; Durability indicators, including dexterity decay rate, dynamic response decay, and wear area analysis, are used to evaluate the performance decay of gloves after long-term use.

4. The inner and outer layer pressure sensing system of firefighter gloves according to claim 3, characterized in that: The method for obtaining the flexibility index includes: The maximum bending angle of the finger when wearing gloves is recorded by an angle measuring device and compared with the angle when not wearing gloves. The expression is: Δθ=|θ1-θ0|; Δθ is the bending angle difference, θ1 is the maximum bending angle when wearing gloves, and θ0 is the maximum bending angle when not wearing gloves; Firefighters wearing gloves try to grab cylindrical objects of different diameters in turn, and record the minimum diameter d that can be successfully grabbed. min ; The dynamic pressure change curve is measured by placing a pressure sensor inside the glove to record the change of pressure value over time during the finger bending or grasping action, and extract relevant data for analysis; the expression is: V p is the pressure rise rate, t max is the moment when the pressure reaches its peak value, p(t max ) is the time t max The corresponding pressure value, t0 is the starting time, and p(t0) is the pressure value corresponding to the starting time t0; By completing the task of touching the thumb and other fingers in sequence within a limited time, the ratio of the number of successes to the total number of attempts is recorded, and the expression is: R is the touch success rate, n s is the number of successes, n c is the total number of attempts; The torque value required in the process of bending the finger is recorded by the torque device, and the torque difference ΔM between wearing gloves and not wearing gloves is calculated. The expression is: ΔM=|M1-M0|; M1 is the maximum torque value required in the process of bending the finger when wearing gloves, and M0 is the maximum torque value required in the process of bending the finger when not wearing gloves; Each parameter was processed by data normalization; Substituting into the formula again: R dimension,j =R dimension,1 =μ4R-μ1Δθ-μ2d min -μ3V p -μ5ΔM; Calculate the comprehensive score R of the flexibility index dimension,1 ; μ1, μ2, μ3, μ4, μ5 are weight coefficients.

5. The inner and outer layer pressure sensing system of firefighter gloves according to claim 3, characterized in that: The method for obtaining the mechanical transmission performance index comprises: Apply force through the internal pressure sensor and record the total force F felt by the internal sensor in and the total force F transmitted to the outside recorded by the external sensor out , and calculate the force transmission efficiency ρ according to the formula, the expression is: The pressure distribution in the stress area is recorded by an external pressure sensor, and the standard deviation XD of the external pressure distribution is calculated w With the mean Ratio as force transmission uniformity k w , the expression is: Apply pressure inside and record that the internal sensor pressure is greater than a certain threshold A th The area of ​​the region Y c and the external sensor pressure is greater than the same threshold A th The area of ​​the region Y s , and calculate the area transfer ratio r; the expression is: Each parameter was processed by data normalization; Substituting into the formula again: R dimension,j =R dimension,2 =τ1ρ-τ2k w +τ3r+τ4h; Calculate the comprehensive score R of the flexibility index dimension,1 ; τ1, τ2, τ3, τ4 are weight coefficients, and h is the fitting performance index.

6. The inner and outer layer pressure sensing system of firefighter gloves according to claim 4, characterized in that: The method for obtaining the lamination performance index h includes: By placing internal pressure sensors on the palm and fingers, the contact pressure data is recorded and the standard deviation XD0 and mean of the pressure distribution are calculated. The ratio is taken as the bonding pressure uniformity k0; Record the pressure data of the internal sensor and calculate the maximum pressure P max With the minimum value P min The difference is expressed as: ΔP = P max -P min ; ΔP is the pressure range; Place pressure sensors at the fingertips of the gloves to record the total pressure P in the fingertip area. sam , and calculate the fingertip fit G; the expression is: P ref is the theoretical value of the total pressure in the fingertip area; The curve p(t i ), calculate the fluctuation amplitude Z of the fitting pressure; the expression is is the mean value of internal pressure; Each parameter is processed by data standardization; then by the formula: The fitting performance index h is calculated; δ1, δ2, δ3, and δ4 are weight factors.

7. The inner and outer layer pressure sensing system of firefighter gloves according to claim 3, characterized in that: The method for obtaining the environmental adaptation performance index includes: Place the glove in a set temperature environment, record the pressure distribution data of the internal pressure sensor, and calculate the pressure distribution change rate q p ; The expression is: is the mean internal pressure at room temperature, is the mean internal pressure at set temperature; Record the fitting pressure range at different temperatures and calculate the pressure range difference Δq at different temperatures p ; The expression is: Δq p =|ΔP 01 -ΔP 02 |ΔP 02 is the pressure range at room temperature, ΔP 01 is the pressure range at the set temperature; Firefighters wear gloves to complete specific tasks in extreme environments, record the task completion time and success rate, and calculate the relative change compared with normal temperature conditions; the relative change rate of task completion time q T The expression is: T1 is the time to complete a specific task in an extreme environment, and T0 is the time to complete a specific task at normal temperature; The relative change rate of success rate q e By formula: Calculated; e1 is the success rate of completing a specific task in an extreme environment, and e0 is the success rate of completing a specific task at normal temperature.

8. The inner and outer layer pressure sensing system of firefighter gloves according to claim 3, characterized in that: The method for obtaining the durability index includes: Firefighters wore gloves and performed repeated actions. The dexterity scores at the initial test and after the operation were recorded, and the dexterity decay rate (R dimension,1 ) a ; The expression is: R dimension,1 Give your initial test a composite flexibility score. Provide an overall score for flexibility after the operation; Dynamic response attenuation measurement, record the pressure response time change after repeated operation, and calculate the dynamic response attenuation rate (T f ) a ; The expression is is the pressure response time after repeated operation, T f is the initial pressure response time; The measurement of wear area analysis records the pressure distribution data of the stress area through an external pressure sensor, and compares the pressure distribution in the initial state to analyze the pressure attenuation of the wear area; the expression is: ΔP β =|P ini -P end |;P ini is the average pressure of the wear area in the initial state, P end ΔP is the average pressure in the wear area after a period of use. β is the change in pressure bearing capacity of the worn part.

9. The inner and outer layer pressure sensing system of firefighter gloves according to any one of claims 4 to 8, characterized in that: The process of data standardization is as follows: By standardizing the formula: Get the standardized value of each parameter R′ i ; Among them, R i is the actual value of each parameter, R max,i and R min,i are the maximum and minimum values ​​of each parameter respectively.

10. The inner and outer layer pressure sensing system of firefighter gloves according to claim 1, characterized in that: The evaluation result output forms include: Radar chart, which intuitively displays the performance of gloves in multiple dimensions; Heat map, which visualizes the changes in pressure distribution of the glove under different actions or experimental conditions; Comprehensive performance score, showing the overall performance of the glove.

Images