Public space barrier-free facility layout method based on multi-agent iteration deduction

Abstract

The invention discloses a public space barrier-free facility layout method based on multi-agent iterative deduction, and the method comprises the steps: obtaining the current data of barrier-free facilities, carrying out the spatial superposition in a geographic information system, and constructing a basic database of urban public space barrier-free facilities; carrying out design standard and demonstration case database construction and carrying out data integration; urban public space barrier-free facility types and evaluation requirements are clarified, a design reference value is determined, and on this basis, current situation layout identification is carried out so as to clarify whether optimization iteration of a planning scheme is carried out or not. A barrier-free facility and vulnerable group agent proxy model and a matching association model of crowd activities and the barrier-free facility are established, iterative optimization of a layout scheme is performed through model simulation and scheme deduction, and finally scheme interactive display and printing generation are performed. According to the invention, identification and layout of the urban public space are realized, and optimization and interactive display are carried out in combination with hardware equipment.

Description

Technical Field

[0001] The present invention relates to the field of urban planning, and in particular to a method for laying out barrier-free facilities in urban public spaces based on multi-agent iterative deduction. Background Art

[0002] In the field of urban planning, the layout of barrier-free facilities in urban public spaces is the key to achieving urban inclusiveness and accessibility. However, the traditional layout methods of barrier-free facilities in urban public spaces have the following limitations: First, traditional data collection methods are inefficient, require a lot of manpower and time costs, and are difficult to ensure the accuracy and real-time nature of the data. Second, traditional layout methods often ignore the specific needs of different user groups, resulting in a mismatch between facility layout and actual needs. Third, the traditional display method lacks interactivity, making it difficult for non-professionals to understand and use the layout results. Therefore, the present invention proposes a method for the layout of barrier-free facilities in urban public spaces based on multi-agent iterative deduction. In order to achieve a more efficient, more accurate and more interactive barrier-free facility layout. Summary of the invention

[0003] Purpose of the invention: The present invention solves the current practical problems of difficulty in data collection of barrier-free facilities in urban public spaces, mismatch between real needs and space, and lack of real-time interaction. It proposes a layout method of barrier-free facilities in public spaces based on multi-agent iterative deduction, responding to the human-oriented needs of urban planning and design under the background of people-orientedness, and using diversified data collection equipment, multi-agent algorithms, agent models and other methods to realize the identification and layout of urban public spaces, and optimize and interactively display them in combination with hardware equipment.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A method for the layout of barrier-free facilities in public spaces based on multi-agent iterative deduction, which obtains the current status data of barrier-free facilities and performs spatial superposition in the geographic information system, constructs a basic database of barrier-free facilities in urban public spaces; constructs a database of design standards and demonstration cases and performs data integration; clarifies the types and evaluation requirements of barrier-free facilities in urban public spaces, determines the design benchmark values, and on this basis identifies the current layout to clarify whether to optimize and iterate the planning scheme. Establish an agent model of barrier-free facilities and vulnerable groups, as well as a matching association model between crowd activities and barrier-free facilities, iterate and optimize the layout scheme through model simulation and scheme deduction, and finally interactively display and print the scheme; specifically includes the following steps:

[0006] Step S1: Obtaining the database of barrier-free facilities in urban public spaces

[0007] Obtain data on barrier-free facilities in urban public spaces. Obtain the current status data of barrier-free facilities in the city, including traffic roads and service facilities, through low-altitude barrier-free facility scanners; obtain activity feature data of the elderly and children in urban public spaces through LBS data combined with GPS smart bracelets; obtain activity feature data of visually impaired and physically impaired people in urban public spaces through full-time infrared sensing scanning equipment, and spatially overlap the above three types of data in the geographic information system to construct a basic database of barrier-free facilities in urban public spaces. Obtain current relevant design standards and benchmarking cases, and construct a current standard database and a demonstration case database. The current standard database is the basis for determining the current status, and the demonstration case database is the main basis for generating layout plans. Integrate the basic database and demonstration case data in a unified geographic information system through the DGX computer workstation to form a database of barrier-free facilities in urban public spaces.

[0008] Step S2: Constructing an evaluation system for barrier-free facilities in urban public spaces

[0009] Clarify the types of barrier-free facilities in urban public spaces, clarify the evaluation requirements for barrier-free facilities in combination with the current standard database, and construct a correlation model between facility types and evaluation requirements.

[0010] Step S3: Identify the current status of barrier-free facilities layout in urban public spaces

[0011] Combined with the current planning standards and the planning indicator sets of various types of barrier-free facilities in the demonstration cases, an indicator library for barrier-free facilities design in urban public spaces is constructed. Based on the learning of the above indicator library, the specific threshold of each indicator is selected using the minimum standard method to further determine the design benchmark value of barrier-free facilities in urban public spaces. The barrier-free facilities database for urban public spaces is called to determine the current status of barrier-free facilities in the target urban public spaces. If the facility types are incomplete or the judgment results do not meet the requirements, it means that the current status of barrier-free facilities in the case public space does not meet the evaluation standards, and step S4 is entered to optimize the layout plan of barrier-free facilities in urban public spaces; if the judgment results meet the requirements, the layout plan can be directly output in S5.

[0012] Step S4: Generate a layout plan for barrier-free facilities in urban public spaces

[0013] Based on the above conditions, the agent model of barrier-free facilities and vulnerable groups is established. The matching association model between crowd activities and barrier-free facilities is constructed, the facility matching judgment standard in S1 is called, the number of iterations is set, and the barrier-free facility layout plan is iteratively optimized by the agent. The current relevant design standards in the barrier-free facilities database of urban public spaces in step S1 are called to judge the plan. If it fails, it returns to step S3; if it passes, the demonstration case database in step S1 is further called for judgment. If it passes, it enters step S5, and if it fails, it returns to step S4 until the conditions are met. Finally, the barrier-free facility layout plan is generated.

[0014] Step S5: Interactive display of the layout plan of barrier-free facilities in urban public spaces

[0015] The three-dimensional display and real-scene interaction of barrier-free facilities in urban public spaces can be realized through urban three-dimensional digital holographic sandbox equipment and virtual reality equipment, and the drawings of the layout plan of barrier-free facilities in urban public spaces can be printed through 3D printing equipment.

[0016] Furthermore, the specific process of step S1 is as follows:

[0017] S11 Acquisition of basic data on the layout of barrier-free facilities in urban public spaces and construction of a data integration platform

[0018] The total number of permanent residents in the administrative district where the urban public space is located is obtained through the government website; the required urban public space plane data is obtained through the OpenStreetMap platform, including four categories: entrances and exits, roads, squares, and facilities; the current status data of barrier-free facilities in urban public spaces is obtained through low-altitude barrier-free facility scanners, including the number of facilities, facility quality, current usage of facilities, and facility types; the activity feature data of the elderly and children in urban public spaces is obtained through GPS smart bracelets combined with LBS data, including activity frequency, activity venues, and facilities used for activities; the activity feature data of people with disabilities in urban public spaces is obtained through full-time infrared sensing scanning equipment, including activity frequency, activity venues, and facilities used for activities. The above data are vectorized and feature indicators are extracted to construct a barrier-free facility data integration platform for urban public spaces.

[0019] S12 Constructing a demonstration case library of barrier-free facilities layout in urban public spaces

[0020] The cities selected in the list of cities, counties, towns and villages with barrier-free environments nationwide announced by the Ministry of Housing and Urban-Rural Development are used as benchmark cases for formulating the design standards for barrier-free facilities in urban public spaces. The public spaces with the largest passenger flow within their urban areas are selected as urban public spaces, and the basic data on the layout of barrier-free facilities in their public spaces are extracted based on step S11 as reference cases for the design standards for barrier-free facilities, thereby constructing a demonstration case library of barrier-free facilities in urban public spaces.

[0021] Furthermore, the specific process of step S2 is as follows:

[0022] S21 Types of barrier-free facilities in urban public spaces

[0023] Based on the General Code for Accessibility of Buildings and Municipal Engineering (GB 55019-2021), the types of barrier-free facilities in urban public spaces are determined as line elements: blind paths, barrier-free ramps; point elements: barrier-free entrances and exits, barrier-free elevators and lifting platforms, barrier-free information exchange facilities, barrier-free urban furniture (seats, trash cans), barrier-free toilets, and barrier-free parking spaces. There are two categories and eight items in total.

[0024] S22 Evaluation of barrier-free facilities in urban public spaces

[0025] Combined with the relevant standards and case library constructed by S1, the evaluation indicators of barrier-free facilities in urban public spaces are clarified as the coverage, equality, accessibility and number of facilities of barrier-free facilities in urban public spaces.

[0026] S23 Correlation and matching between types of barrier-free facilities in urban public spaces and planning objectives

[0027] Combined with the current standards and case libraries described in S12 and S22, clarify the correlation and matching degree between the types of barrier-free facilities and relevant planning objectives;

[0028] Referring to the inclusive city theory and life circle theory, and the standard database constructed in S1, the planning standards for barrier-free facilities in urban public spaces are clarified, that is, the coverage, equality, accessibility, and number of facilities in urban public spaces - the case city population ratio (DPR, Device-to-Population Ratio) of barrier-free facilities can meet the barrier-free facility layout requirements required for crowd activities, and barrier-free entrances and exits, barrier-free elevators and lifting platforms need to be set up in combination with the terrain height difference. Determine whether the above content meets the current standard requirements. If yes, go to S4; if not, go to the next step.

[0029] Furthermore, the specific process of step S3 is as follows:

[0030] S31 Determine the calculation method of barrier-free facilities index in urban public spaces

[0031] Based on the index calculation requirements, the urban public space is gridded with 5m*5m grid units, and the corresponding calculation method is determined according to the planning indicators that need to be met by the planning objectives of barrier-free facilities in urban public spaces as described in S24, including barrier-free facility coverage, barrier-free facility uniformity, barrier-free facility accessibility, barrier-free facility number to population ratio (DPR) and distance from terrain height difference point. The specific calculation method is shown in the following table:

[0032]

[0033] Combined with the barrier-free facility data integration platform for urban public spaces described in S11 and the barrier-free facility layout demonstration case library for urban public spaces described in S12, obtain the barrier-free facility planning data for the case library. Based on the calculation method of S31, calculate the barrier-free facility coverage rate index set, barrier-free facility uniformity index set, barrier-free facility accessibility index set, and barrier-free facility number to population ratio index set for the aforementioned demonstration case public spaces.

[0034] S32 Design benchmark values ​​for barrier-free facilities in urban public spaces

[0035] Combining the current planning standards and various types of barrier-free facility planning indicator sets of demonstration cases, we constructed an urban public space barrier-free facility design indicator library. Based on the study of the above indicator library, we used the minimum standard method to select the specific threshold of each indicator and further determined the design benchmark value of barrier-free facilities in urban public spaces. The specific calculation method of the benchmark value is as follows:

[0036]

[0037] S33 Identify the current status of barrier-free facilities layout in public spaces of target cities

[0038] Combining the data feature set of barrier-free facilities in urban public spaces described in S1 with the calculation method of barrier-free facilities planning indicators in urban public spaces described in S31, the indicators of barrier-free facilities in the target urban public spaces are calculated, and the calculation results are compared with the design benchmark values ​​of barrier-free facilities in urban public spaces described in S32. The specific judgment criteria are as follows:

[0039]

[0040]

[0041] According to the above judgment method, if the facility types are incomplete or the judgment result does not meet the requirements, it means that the current status of the barrier-free facilities in the case public space does not meet the evaluation standards, and the process goes to step S4 to optimize the layout plan of barrier-free facilities in the urban public space; if the judgment result meets the requirements, the process can directly go to S5 to output the layout plan.

[0042] Furthermore, the specific process of step S4 is as follows:

[0043] S41 Accessible facilities and agency model for disadvantaged groups

[0044] Combining the calculation method of the planning indicators of barrier-free facilities in urban public spaces described in S31 and the design benchmark values ​​of barrier-free facilities in urban public spaces described in S32, the above standards are used as characteristic constraints to construct an intelligent agent model for all types of barrier-free facilities in urban public spaces. Disabled people, the elderly and children are defined as vulnerable groups, and the target needs of vulnerable groups in urban public spaces are clarified as the need to use all types of barrier-free facilities described in S21 along the path, which is used as a constraint to construct an intelligent agent model for vulnerable groups.

[0045] S42 Demand-space matching multi-agent system model construction

[0046] The target city public space area is rasterized with 5m*5m grid units and the grid units that are completely out of range are removed. Combined with the barrier-free facility data feature set of the urban public space described in S11, the physical environment data set is established using the land parcel data of the target city public space and the corresponding crowd activity data. Combined with the proxy model of the barrier-free facility agent and the vulnerable group agent described in S41, a multi-agent system model is established, and the Simulink tool is used for system simulation and operation simulation. The above data are uniformly placed in the S1 data integration platform.

[0047] S43 Iterative Optimization of Accessible Facilities in Urban Public Spaces Based on Multi-agent Model

[0048] In the aforementioned data set platform, the multi-agent system model is analyzed for the matching association between vulnerable groups and barrier-free facilities. Furthermore, the condition for outputting the facility layout plan is that the barrier-free facility agent satisfies the characteristic constraint condition, i.e., the design benchmark value of barrier-free facilities in urban public spaces described in S23; and the matching association between the vulnerable group agent and barrier-free facilities satisfies the condition, i.e., the vulnerable group can reach all barrier-free facilities in the plan. Set the number of iterations parameter, and the specific parameter settings are as follows:

[0049] parameter value Initial number of iterations 100 Convergence Threshold 1％ Maximum number of iterations 500 Intermediate evaluation frequency Evaluate every 50 iterations

[0050] The layout plan can be output when the above conditions are met. If not, return to the previous step and continue iterating until they are met.

[0051] Furthermore, the detailed process of step S5 is as follows:

[0052] The three-dimensional display and real-life interaction of barrier-free facilities in urban public spaces are realized through urban three-dimensional digital holographic sandbox equipment and virtual reality equipment. For healthy people, panoramic virtual glasses equipped with binocular resolution of 3664x1920 pixels and 98° field of view sensors and displays are used for interaction. For disabled people, intelligent navigation systems with 3664x1920 pixels, text recognition to speech, more than 90% accurate speech recognition, second-level facial recognition technology, meter-level positioning accuracy, and intelligent guide robots with high-fidelity speech output devices are used for real-life interaction of images and text to speech. Then, the drawings of the layout plan of barrier-free facilities in urban public spaces are printed through 3D printing equipment.

[0053] Beneficial effects:

[0054] 1. The present invention integrates the barrier-free facilities data of urban public spaces and unifies them on the geographic information platform, innovatively combines the human-land related barrier-free facilities data, focuses on the data of the elderly and children based on LBS data, and the activity feature data of the disabled obtained based on the full-time infrared sensing scanning equipment, and couples the current layout data of barrier-free facilities, breaking through the limitation of traditional data collection technology that it is difficult to directly obtain the activity data of the disabled.

[0055] 2. The present invention focuses on the importance of evaluation criteria for the intelligent generation of barrier-free facility layout planning schemes. By combining the current planning standards and various types of barrier-free facility planning indicator sets of barrier-free demonstration city cases, a barrier-free facility design indicator library for urban public spaces is constructed, and the specific threshold of each indicator is selected using the minimum standard method to determine the design benchmark value of barrier-free facilities in urban public spaces. The setting of the benchmark value of barrier-free facility layout planning indicators realizes the applicability of evaluation indicators in the intelligent generation of barrier-free facility layout planning schemes, which is helpful for the comparison and determination of subsequent layout schemes.

[0056] 3. The present invention innovatively establishes an agent model of barrier-free facilities and vulnerable groups to simulate the combination relationship between barrier-free facilities and vulnerable groups under different layout schemes and compare and judge with the design benchmark value, and finally generates a reasonable layout scheme through iterative optimization. The simulation of barrier-free facility agents and vulnerable group agents can effectively improve the accuracy of the design, and the data-driven optimization method can significantly improve the scientificity and accuracy of the design scheme; at the same time, testing and iterating different schemes in a virtual environment can reduce the cost of trial and error. Through data simulation and optimization, potential problems can be solved in the design stage, thereby reducing the cost of later modification and maintenance.

[0057] 4. The interactive display module of the layout plan of barrier-free facilities in public spaces of the present invention can realize the three-dimensional display and real-scene interaction of barrier-free facilities in urban public spaces through urban three-dimensional digital holographic sandbox equipment and virtual reality equipment, so that managers, decision makers and users can intuitively experience the layout plan of barrier-free facilities and perform human-computer interactive optimization and adjustment, providing the staff and the urban public, especially the vulnerable groups, with a three-dimensional display and real-scene interactive experience of barrier-free facilities in urban public spaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 is a flow chart of the method of the present invention;

[0059] Figure 2 A schematic diagram of identifying barrier-free facilities in urban public spaces according to the present invention;

[0060] Figure 3 This is a diagram showing the spatial layout of barrier-free facilities in urban public spaces according to the present invention. DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0062] A method for layout of barrier-free facilities in public spaces based on multi-agent iterative deduction, such as Figure 1-3 As shown, the following steps are included:

[0063] Step S1: Obtain data on barrier-free facilities in urban public spaces. Obtain the status data of barrier-free facilities in two categories, namely, traffic roads and service facilities, in the city through a low-altitude barrier-free facility scanner; obtain the activity characteristic data of the elderly and children in urban public spaces through LBS data combined with GPS smart bracelets; obtain the activity characteristic data of the two categories of disabled people, namely, visually impaired and physically disabled, in urban public spaces through full-time infrared sensing scanning equipment, and spatially overlap the above three types of data in the geographic information system to construct a basic database of barrier-free facilities in urban public spaces. Obtain the current relevant design standards and benchmarking cases, and construct a current standard database and a demonstration case database, wherein the current standard database is the basis for determining the current status, and the demonstration case database is the main basis for generating layout plans. Integrate the basic database and demonstration case data in a unified geographic information system through the DGX computer workstation to form a database of barrier-free facilities in urban public spaces.

[0064] The detailed process of step S1 is as follows:

[0065] Step 1.1, acquisition of basic data on the layout of barrier-free facilities in urban public spaces and construction of a data integration platform. Obtain the total permanent population of the administrative district where the urban public space is located through the government website; obtain the required urban public space plane data through the OpenStreetMap platform, including four categories: entrances and exits, roads, squares, and facilities; obtain the current status data of barrier-free facilities in urban public spaces through low-altitude barrier-free facility scanners, including the number of facilities, facility quality, current facility usage, and facility types; obtain the activity characteristic data of the elderly and children in urban public spaces through GPS smart bracelets combined with LBS data, including activity frequency, activity venues, and facilities used for activities; obtain the activity characteristic data of people with disabilities in urban public spaces through full-time infrared sensing scanning equipment, including activity frequency, activity venues, and facilities used for activities. Vectorize the above data and extract characteristic indicators to construct a barrier-free facility data integration platform for urban public spaces. Among them, the data types and acquisition methods of the urban public space are as follows:

[0066]

[0067] Step 1.2: Construct a demonstration case library of barrier-free facilities layout in urban public spaces. The cities selected in the list of cities, counties, towns and villages with barrier-free environments nationwide announced by the Ministry of Housing and Urban-Rural Development are used as benchmark cases for formulating barrier-free facility design standards for urban public spaces. The public spaces with the largest flow of people within their urban areas are selected as urban public spaces, and the basic data of barrier-free facility layout in their public spaces are extracted based on step S11 as reference cases for barrier-free facility design standards, thereby constructing a demonstration case library of barrier-free facilities in urban public spaces.

[0068] Step S2: Construct an evaluation system for barrier-free facilities in urban public spaces. Clarify the types of barrier-free facilities in urban public spaces, clarify the evaluation requirements for barrier-free facilities in combination with the current standard database, and construct a correlation model between facility types and evaluation requirements.

[0069] The detailed process of step S2 is as follows:

[0070] Step 2.1, determine the types of barrier-free facilities in urban public spaces. Based on the General Code for Barrier-Free Construction and Municipal Engineering (GB 55019-2021), the types of barrier-free facilities in urban public spaces are determined as line elements: blind paths, barrier-free ramps; point elements: barrier-free entrances and exits, barrier-free elevators and lifting platforms, barrier-free information exchange facilities, barrier-free urban furniture (seats, trash cans), barrier-free toilets, barrier-free parking spaces. There are two categories and 8 items in total.

[0071] Step 2.2: Evaluation of barrier-free facilities in urban public spaces. In combination with the relevant standards and case libraries constructed in S1, the evaluation indicators of barrier-free facilities in urban public spaces are defined as the coverage, equality, accessibility and number of barrier-free facilities in urban public spaces.

[0072] Step 2.3: Correlation and matching between types of barrier-free facilities in urban public spaces and planning objectives. Combined with the current standards and case libraries described in S12 and S22, clarify the correlation and matching between types of barrier-free facilities and relevant planning objectives. The specific planning objectives are shown in the following table:

[0073]

[0074] Referring to the inclusive city theory and life circle theory, and the standard database constructed in S1, the planning standards for barrier-free facilities in urban public spaces are clarified, that is, the coverage, equality, accessibility, and number of facilities in urban public spaces - the case city population ratio (DPR, Device-to-Population Ratio) of barrier-free facilities can meet the barrier-free facility layout requirements required for crowd activities, and barrier-free entrances and exits, barrier-free elevators and lifting platforms need to be set up in combination with the terrain height difference. Determine whether the above content meets the current standard requirements. If yes, go to S4; if not, go to the next step.

[0075] Step S3: Identify the current layout of barrier-free facilities in urban public spaces. Combined with the current planning standards and the planning indicator sets of various types of barrier-free facilities in demonstration cases, construct an indicator library for barrier-free facilities design in urban public spaces, and based on the learning of the above indicator library, use the minimum standard method to select the specific threshold of each indicator to further determine the design benchmark value of barrier-free facilities in urban public spaces. Call the barrier-free facilities database in urban public spaces to determine the current status of barrier-free facilities in the target city's public spaces. If the facility types are incomplete or the judgment results do not meet the requirements, it means that the current status of barrier-free facilities in the case public space does not meet the evaluation standards, and enter step S4 to optimize the layout plan of barrier-free facilities in urban public spaces; if the judgment results meet the requirements, you can directly enter S5 to output the layout plan.

[0076] The detailed process of step S3 is as follows:

[0077] Step 3.1: Identify the current layout of barrier-free facilities in urban public spaces. This includes the calculation method of barrier-free facilities in urban public spaces, the benchmark value of barrier-free facilities in urban public spaces, and the current identification of barrier-free facilities in urban public spaces.

[0078] Step 3.2, determine the calculation method of barrier-free facilities index in urban public spaces. Based on the index calculation requirements, the urban public space is gridded with 5m*5m grid units, and the corresponding calculation method is determined according to the planning indicators that need to be met by the barrier-free facilities planning objectives of urban public spaces described in S24, including barrier-free facility coverage, barrier-free facility uniformity, barrier-free facility accessibility, barrier-free facility number to population ratio (DPR) and distance from terrain height difference point. The specific calculation method is shown in the following table:

[0079]

[0080]

[0081] Combined with the barrier-free facility data integration platform for urban public spaces described in S11 and the barrier-free facility layout demonstration case library for urban public spaces described in S12, obtain the barrier-free facility planning data for the case library. Based on the calculation method of S31, calculate the barrier-free facility coverage rate index set, barrier-free facility uniformity index set, barrier-free facility accessibility index set, and barrier-free facility number to population ratio index set for the aforementioned demonstration case public spaces.

[0082] Step 3.3, identify the current layout of barrier-free facilities in the target city's public spaces. Combined with the barrier-free facilities data feature set of the urban public space described in S1 and the calculation method of the barrier-free facilities planning index of the urban public space described in S31, the barrier-free facilities status of the target city's public space is calculated, and the calculation results are compared with the design benchmark values ​​of barrier-free facilities in the urban public space described in S32. The specific judgment criteria are as follows:

[0083]

[0084] According to the above judgment method, if the facility types are incomplete or the judgment result does not meet the requirements, it means that the current status of the barrier-free facilities in the case public space does not meet the evaluation standards, and the process goes to step S4 to optimize the layout plan of barrier-free facilities in the urban public space; if the judgment result meets the requirements, the process can directly go to S5 to output the layout plan.

[0085] Step S4: Generate a layout plan for barrier-free facilities in urban public spaces. Based on the above conditions, establish an agent model for barrier-free facilities and vulnerable groups. Construct a matching association model between crowd activities and barrier-free facilities, call the facility matching judgment criteria in S1, set the number of iterations, iteratively optimize the barrier-free facility layout plan through the agent, call the current relevant design standards in the barrier-free facilities database in step S1, and judge the plan. If it fails, return to step S3; if it passes, further call the demonstration case database in step S1 for judgment. If it passes, go to step S5, if it fails, return to step S4, until the conditions are met. Finally, generate a barrier-free facility layout plan.

[0086] The detailed process of step S4 is as follows:

[0087] Step 4.1, set up the agent model of barrier-free facilities and vulnerable groups. Combined with the calculation method of barrier-free facilities planning indicators in urban public spaces described in S31 and the design benchmark values ​​of barrier-free facilities in urban public spaces described in S32, the above standards are used as characteristic constraints to construct the agent model of all types of barrier-free facilities in urban public spaces; define the disabled, the elderly and children as vulnerable groups, and clarify that the target demand of vulnerable groups in urban public spaces is to use all types of barrier-free facilities described in S21 along the path, which is used as a constraint to construct the agent model of vulnerable groups.

[0088] Step 4.2, construct a multi-agent system model for demand-space matching. Rasterize the target city public space area with 5m*5m grid units and remove grid units that are completely out of range. Combine the barrier-free facility data feature set of the urban public space described in S11, use the plot data of the target city public space and the corresponding crowd activity data to establish a physical environment data set, combine the barrier-free facility agent and the agent model of the vulnerable group agent described in S41, establish a multi-agent system model, and use the Simulink tool to perform system simulation and operation simulation. The above data are uniformly placed in the S1 data integration platform.

[0089] Step 4.3, iterative optimization of barrier-free facilities in urban public spaces based on a multi-agent model. In the aforementioned data set platform, the multi-agent system model is subjected to a matching association analysis between vulnerable groups and barrier-free facilities. Furthermore, the condition for outputting the facility layout plan is set such that the barrier-free facility agent satisfies the characterized constraint conditions, i.e., the design benchmark value of barrier-free facilities in urban public spaces described in S23; and the matching association between the vulnerable group agent and the barrier-free facilities satisfies the condition, i.e., the vulnerable group can reach all barrier-free facilities in the plan. Set the number of iterations parameter, and the specific parameter settings are as follows:

[0090] parameter value Initial number of iterations 100 Convergence Threshold 1％ Maximum number of iterations 500 Intermediate evaluation frequency Evaluate every 50 iterations

[0091] The layout plan can be output when the above conditions are met. If not, return to the previous step and continue iterating until they are met.

[0092] Step S5: The three-dimensional display and real-scene interaction of barrier-free facilities in urban public spaces are realized through urban three-dimensional digital holographic sandbox equipment and virtual reality equipment, and the drawing printing of the layout plan of barrier-free facilities in urban public spaces is realized through 3D printing equipment.

[0093] The detailed process of step S5 is as follows:

[0094] The three-dimensional display and real-life interaction of barrier-free facilities in urban public spaces are realized through urban three-dimensional digital holographic sandbox equipment and virtual reality equipment. For healthy people, panoramic virtual glasses equipped with binocular resolution of 3664x1920 pixels and 98° field of view sensors and displays are used for interaction. For disabled people, intelligent navigation systems with 3664x1920 pixels, text recognition to speech, more than 90% accurate speech recognition, second-level facial recognition technology, meter-level positioning accuracy, and intelligent guide robots with high-fidelity speech output devices are used for real-life interaction of images and text to speech. Then, the drawings of the layout plan of barrier-free facilities in urban public spaces are printed through 3D printing equipment.

[0095] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A method for layout of barrier-free facilities in public spaces based on multi-agent iterative deduction, characterized in that: The following steps are involved: Step S1: Obtaining the database of barrier-free facilities in urban public spaces Obtain data on barrier-free facilities in urban public spaces; obtain data on the status of barrier-free facilities in two categories, traffic roads and service facilities, in the city through low-altitude barrier-free facility scanners; obtain activity feature data of the elderly and children in urban public spaces through LBS data combined with GPS smart bracelets; obtain activity feature data of visually impaired and physically impaired people in urban public spaces through full-time infrared sensing scanning equipment, spatially overlap the above three types of data in the geographic information system, and construct a basic database of barrier-free facilities in urban public spaces; obtain current relevant design standards and benchmarking cases, and construct a current standard database and a demonstration case database, among which the current standard database is the basis for determining the current status, and the demonstration case database is the main basis for generating layout plans; integrate the basic database and demonstration case data in a unified geographic information system through the DGX computer workstation to form a database of barrier-free facilities in urban public spaces; Step S2: Constructing an evaluation system for barrier-free facilities in urban public spaces Clarify the types of barrier-free facilities in urban public spaces, clarify the evaluation requirements for barrier-free facilities based on the current standard database, and construct a correlation model between facility types and evaluation requirements; Step S3: Identify the current status of barrier-free facilities layout in urban public spaces Combined with the current planning standards and the planning indicator sets of various types of barrier-free facilities in the demonstration cases, an urban public space barrier-free facility design indicator library is constructed, and based on the learning of the above indicator library, the specific threshold of each indicator is selected using the minimum standard method to further determine the design benchmark value of barrier-free facilities in urban public spaces; the urban public space barrier-free facility database is called to determine the current status of barrier-free facilities in the target urban public space; if the facility types are incomplete or the judgment result does not meet the requirements, it means that the current status of barrier-free facilities in the case public space does not meet the evaluation standards, and the process goes to step S4 to optimize the layout plan of barrier-free facilities in urban public spaces; if the judgment result meets the requirements, the process can directly go to S5 to output the layout plan; Step S4: Generate a layout plan for barrier-free facilities in urban public spaces Based on the above conditions, an agent model of barrier-free facilities and vulnerable groups is established; a matching association model between crowd activities and barrier-free facilities is constructed, the facility matching judgment standard in S1 is called, the number of iterations is set, and the barrier-free facility layout plan is iteratively optimized by the agent, and the current relevant design standards in the barrier-free facilities database of urban public spaces in step S1 are called to judge the plan. If it fails, it returns to step S3; if it passes, the demonstration case database in step S1 is further called for judgment. If it passes, it enters step S5, and if it fails, it returns to step S4 until the conditions are met; finally, a barrier-free facility layout plan is generated; Step S5: Interactive display of the layout plan of barrier-free facilities in urban public spaces The three-dimensional display and real-scene interaction of barrier-free facilities in urban public spaces can be realized through urban three-dimensional digital holographic sandbox equipment and virtual reality equipment, and the drawings of the layout plan of barrier-free facilities in urban public spaces can be printed through 3D printing equipment.

2. The method for layout of barrier-free facilities in public spaces based on multi-agent iterative deduction according to claim 1 is characterized in that: The specific process of step S1 is: S11 Acquisition of basic data on the layout of barrier-free facilities in urban public spaces and construction of a data integration platform Obtain the total permanent population of the administrative district where the urban public space is located through the government website; obtain the required urban public space plane data through the OpenStreetMap platform, including four categories: entrances and exits, roads, squares, and facilities; obtain the current status data of barrier-free facilities in urban public spaces through low-altitude barrier-free facility scanners, including the number of facilities, facility quality, current usage of facilities, and facility types; obtain the activity feature data of the elderly and children in urban public spaces through GPS smart bracelets combined with LBS data, including activity frequency, activity venues, and facilities used for activities; obtain the activity feature data of people with disabilities in urban public spaces through full-time infrared sensing scanning equipment, including activity frequency, activity venues, and facilities used for activities; vectorize the above data and extract feature indicators to construct a barrier-free facility data integration platform for urban public spaces; S12 Constructing a demonstration case library of barrier-free facilities layout in urban public spaces The cities selected in the list of cities, counties, towns and villages with barrier-free environments nationwide announced by the Ministry of Housing and Urban-Rural Development are used as benchmark cases for formulating the design standards for barrier-free facilities in urban public spaces. The public spaces with the largest passenger flow within their urban areas are selected as urban public spaces, and the basic data on the layout of barrier-free facilities in their public spaces are extracted based on step S11 as reference cases for the design standards for barrier-free facilities, thereby constructing a demonstration case library of barrier-free facilities in urban public spaces.

3. The method for layout of barrier-free facilities in public spaces based on multi-agent iterative deduction according to claim 2 is characterized in that: The specific process of step S2 is: S21 Types of barrier-free facilities in urban public spaces Based on the General Barrier-free Specifications for Buildings and Municipal Engineering, the types of barrier-free facilities in urban public spaces are determined as line elements: blind paths, barrier-free ramps; point elements: barrier-free entrances and exits, barrier-free elevators and lifting platforms, barrier-free information exchange facilities, barrier-free urban furniture, barrier-free toilets, barrier-free parking spaces; a total of two categories and 8 items; S22 Evaluation of barrier-free facilities in urban public spaces Combined with the relevant standards and case library constructed in S1, the evaluation indicators of barrier-free facilities in urban public spaces are defined as the coverage, equality, accessibility and number of barrier-free facilities in urban public spaces; S23 Correlation and matching between types of barrier-free facilities in urban public spaces and planning objectives Combined with the current standards and case libraries described in S12 and S22, clarify the correlation and matching degree between the types of barrier-free facilities and relevant planning objectives; With reference to the inclusive city theory and life circle theory, and the standard database constructed in S1, the planning standards for barrier-free facilities in urban public spaces are clarified, that is, the coverage rate, equality, accessibility and number of facilities of barrier-free facilities in urban public spaces - the ratio of the population of the case city can meet the barrier-free facility layout requirements required for the activities of the crowd, and barrier-free entrances and exits, barrier-free elevators and lifting platforms need to be set up in combination with the terrain height difference; determine whether the above contents meet the current standard requirements, if yes, go to S4, if not, go to the next step.

4. The method for layout of barrier-free facilities in public spaces based on multi-agent iterative deduction according to claim 3 is characterized in that: The specific process of step S3 is: S31 Determine the calculation method of barrier-free facilities index in urban public spaces Based on the index calculation requirements, the urban public space is gridded with 5m*5m grid units, and the corresponding calculation method is determined according to the planning indicators that need to be met by the planning objectives of barrier-free facilities in urban public spaces as described in S24, including barrier-free facility coverage, barrier-free facility uniformity, barrier-free facility accessibility, barrier-free facility number to population ratio and distance from terrain height difference point. The specific calculation method is shown in the following table: Combined with the barrier-free facilities data integration platform for urban public spaces described in S11 and the barrier-free facilities layout demonstration case library for urban public spaces described in S12, obtain the barrier-free facilities planning data for the case library; based on the calculation method of S31, calculate the barrier-free facilities coverage rate index set, barrier-free facilities uniformity index set, barrier-free facilities accessibility index set, barrier-free facilities number and population ratio index set for the aforementioned demonstration case public spaces respectively; S32 Design benchmark values ​​for barrier-free facilities in urban public spaces Combining the planning indicator sets of various types of barrier-free facilities in current planning standards and demonstration cases, an indicator library for barrier-free facilities design in urban public spaces is constructed. Based on the study of the above indicator library, the specific threshold of each indicator is selected using the minimum standard method to further determine the design benchmark value of barrier-free facilities in urban public spaces. The specific calculation method of the benchmark value is as follows: S33 Identify the current status of barrier-free facilities layout in public spaces of target cities Combining the data feature set of barrier-free facilities in urban public spaces described in S1 with the calculation method of barrier-free facilities planning indicators in urban public spaces described in S31, the indicators of barrier-free facilities in the target urban public spaces are calculated, and the calculation results are compared with the design benchmark values ​​of barrier-free facilities in urban public spaces described in S32. The specific judgment criteria are as follows: According to the above judgment method, if the facility types are incomplete or the judgment result does not meet the requirements, it means that the current status of the barrier-free facilities in the case public space does not meet the evaluation standards, and the process goes to step S4 to optimize the layout plan of barrier-free facilities in the urban public space; if the judgment result meets the requirements, the process goes directly to S5 to output the layout plan.

5. The method for layout of barrier-free facilities in public spaces based on multi-agent iterative deduction according to claim 4 is characterized in that: The specific process of step S4 is as follows: S41 Accessible facilities and agency model for disadvantaged groups Combining the calculation method of the planning index of barrier-free facilities in urban public spaces described in S31 and the design benchmark value of barrier-free facilities in urban public spaces described in S32, the above standards are used as characteristic constraints to construct an intelligent agent agent model of all types of barrier-free facilities in urban public spaces; the disabled, the elderly and children are defined as vulnerable groups, and the target demand of vulnerable groups in urban public spaces is to use all types of barrier-free facilities described in S21 along the path, which is used as a constraint condition to construct an intelligent agent agent model of vulnerable groups; S42 Demand-space matching multi-agent system model construction The target city public space area is rasterized with 5m*5m grid units and the grid units that are completely out of range are removed. Combined with the barrier-free facility data feature set of the urban public space described in S11, the physical environment data set is established using the plot data of the target city public space and the corresponding crowd activity data. Combined with the proxy model of the barrier-free facility agent and the vulnerable group agent described in S41, a multi-agent system model is established, and the Simulink tool is used to perform system simulation and operation simulation; the above data are uniformly placed in the S1 data integration platform; S43 Iterative optimization of barrier-free facilities in urban public spaces based on multi-agent model In the aforementioned data set platform, the matching association analysis between vulnerable groups and barrier-free facilities is performed on the multi-agent system model. The condition for outputting the facility layout plan is that the barrier-free facility agent satisfies the characterized constraint conditions, i.e., the design benchmark value of barrier-free facilities in urban public spaces described in S23; and the matching association between the vulnerable group agent and barrier-free facilities satisfies the condition, i.e., the vulnerable group can reach all barrier-free facilities in the plan; set the number of iterations parameter, and the specific parameter settings are as follows: The layout plan can be output when the above conditions are met; if not, return to the previous step and continue iterating until they are met.

6. The method for layout of barrier-free facilities in public spaces based on multi-agent iterative deduction according to claim 5 is characterized in that: The specific process of step S5 is as follows: The three-dimensional display and real-life interaction of barrier-free facilities in urban public spaces are realized through urban three-dimensional digital holographic sandbox equipment and virtual reality equipment. For healthy people, panoramic virtual glasses equipped with binocular resolution of 3664x1920 pixels and 98° field of view sensor and display are used for interaction. For disabled people, a smart guide robot with a 3664x1920 pixel camera, text recognition to speech, more than 90% accurate speech recognition, second-level facial recognition technology, meter-level positioning accuracy and high-fidelity voice output equipment is used for real-life interaction of images and text to speech. Then, 3D printing equipment is used to print drawings of the layout plan of barrier-free facilities in urban public spaces.

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