Method and system for arranging passive wireless temperature sensors

Abstract

The invention is suitable for the technical field of temperature detection, and particularly relates to a passive wireless temperature sensor arrangement method and system, and the method comprises the steps: obtaining a building model, dividing the building model into a plurality of arrangement intervals, and generating a plurality of arrangement interval models; importing an arrangement interval model, carrying out sealing processing, dividing to obtain a plurality of arrangement spaces, and determining the number of sensors; constructing detection grids, carrying out signal transmission simulation, determining a signal coverage range when a reader is arranged in each detection grid, and obtaining transmission simulation data; and constructing reader combinations based on the transmission analog data, determining signal coverage conditions under different reader combinations, screening out the reader combinations meeting preset conditions, and determining the position of each sensor. According to the method, the building model is analyzed, so that the setting position of each sensor is intelligently determined, each sensor can be detected by a reader, the arrangement efficiency is greatly improved, and the operation stability is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of temperature detection, and in particular relates to a method and system for arranging a passive wireless temperature sensor. Background Art

[0002] Passive wireless temperature sensors are devices that do not require a built-in power source and are activated by external energy (such as radio waves). They can accurately measure ambient temperature and transmit data to a reader or receiver wirelessly. This type of sensor is small and easy to install. It is suitable for application scenarios that are difficult to wire or require long-term maintenance-free, such as smart buildings, cold chain logistics, industrial monitoring, etc., providing an efficient and reliable temperature monitoring solution.

[0003] In smart buildings, in order to monitor the temperature of multiple areas in the building so as to control the temperature control equipment for temperature adjustment, the layout of existing passive wireless temperature sensors mainly relies on manual random layout. After installation, the limited transmission power of the reader will affect the data reading of the sensor, resulting in reduced sensor layout efficiency and greatly increased layout costs. Summary of the invention

[0004] The purpose of the present invention is to provide a method for arranging passive wireless temperature sensors, aiming to solve the problem that the arrangement of existing passive wireless temperature sensors mainly relies on manual random arrangement. After installation, the data reading of the sensor will be affected due to the limited transmission power of the reader / writer, resulting in reduced sensor arrangement efficiency and greatly increased arrangement cost.

[0005] The present invention is implemented in this way: a method for arranging a passive wireless temperature sensor, the method comprising:

[0006] Acquire a building model, divide the building model into a plurality of layout intervals, and generate a plurality of layout interval models, wherein the projection area of ​​the layout interval models on a horizontal plane does not exceed a preset value;

[0007] Import the layout interval model, close the walls in the layout interval model, divide it into multiple layout spaces, and determine the number of sensors in each layout space according to the area of ​​the layout space;

[0008] Building a detection grid based on the layout interval model, performing signal transmission simulation according to the detection grid, determining the signal coverage when setting a reader in each detection grid, and obtaining transmission simulation data;

[0009] Build reader combinations based on transmission simulation data, determine the signal coverage under different reader combinations, screen out reader combinations that meet preset conditions, and determine the locations of each sensor.

[0010] Preferably, the step of importing the layout interval model, closing the walls in the layout interval model, dividing the model into a plurality of layout spaces, and determining the number of sensors in each layout space according to the area of ​​the layout space specifically includes:

[0011] Import the layout interval model, and close the doors and windows in the layout interval model to form multiple layout spaces;

[0012] Calculate the area of ​​the layout space, divide the layout space whose area exceeds a preset value, and obtain multiple sensor installation areas;

[0013] The number of sensors in each sensor installation area is determined according to a preset installation density, and the available installation range of each sensor is determined according to a preset installation interval.

[0014] Preferably, the step of constructing a detection grid based on the layout interval model, performing signal transmission simulation according to the detection grid, determining the signal coverage range when setting a reader in each detection grid, and obtaining transmission simulation data specifically includes:

[0015] Building a detection grid based on the layout interval model, dividing the entire layout interval model into multiple detection grids;

[0016] Screen the detection grids, remove the detection grids whose distance from the wall exceeds the preset value, and select the point in the detection grid closest to the wall as the setting point;

[0017] A virtual reader is set at each setting point, and the corresponding signal coverage range is determined according to the parameters of the virtual reader to generate transmission simulation data.

[0018] Preferably, the steps of constructing a reader combination based on the transmission simulation data, determining the signal coverage under different reader combinations, screening out a reader combination that meets preset conditions, and determining the position of each sensor specifically include:

[0019] Selecting a corresponding number of readers according to a preset number of combined readers to construct a reader combination, and determining a signal coverage range of each reader according to transmission simulation data;

[0020] Determine whether the signal coverage of each reader combination covers all available installation ranges, and screen the reader combinations;

[0021] The sensor installation location within each available installation range is adjusted based on the signal coverage of the remaining reader combinations.

[0022] Preferably, the distance between any two sensors is greater than a preset value.

[0023] Another object of the present invention is to provide a passive wireless temperature sensor arrangement system, the system comprising:

[0024] A model building module, used to obtain a building model, divide the building model into a plurality of layout intervals, and generate a plurality of layout interval models, wherein the projection area of ​​the layout interval models on a horizontal plane does not exceed a preset value;

[0025] The space division module is used to import the layout interval model, close the walls in the layout interval model, divide it into multiple layout spaces, and determine the number of sensors in each layout space according to the area of ​​the layout space;

[0026] A transmission simulation module is used to construct a detection grid based on the layout interval model, perform signal transmission simulation according to the detection grid, determine the signal coverage when the reader is set in each detection grid, and obtain transmission simulation data;

[0027] The position positioning module is used to build a reader combination based on the transmission simulation data, determine the signal coverage under different reader combinations, screen out the reader combination that meets the preset conditions, and determine the position of each sensor.

[0028] Preferably, the space division module includes:

[0029] A model closing unit is used to import a layout interval model and close the doors and windows in the layout interval model to form multiple layout spaces;

[0030] An installation area division unit is used to calculate the area of ​​the layout space, and divide the layout space whose area exceeds a preset value to obtain multiple sensor installation areas;

[0031] The installation range identification unit is used to determine the number of sensors in each sensor installation area according to a preset installation density, and to determine the available installation range of each sensor according to a preset installation interval.

[0032] Preferably, the transmission simulation module includes:

[0033] A model division unit, used for constructing a detection grid based on the layout interval model, and dividing the entire layout interval model into a plurality of detection grids;

[0034] A grid screening unit is used to screen the detection grids, remove the detection grids whose distance from the wall exceeds a preset value, and select the point in the detection grid closest to the wall as the setting point;

[0035] The simulation data generating unit is used to set a virtual reader at each setting point, determine the corresponding signal coverage range according to the parameters of the virtual reader, and generate transmission simulation data.

[0036] Preferably, the position positioning module includes:

[0037] A signal simulation unit, used for selecting a corresponding number of readers according to a preset number of combined readers to construct a reader combination, and determining a signal coverage range of each reader according to the transmission simulation data;

[0038] A signal range screening unit, used to determine whether the signal coverage range of each reader combination covers all available installation ranges, and screen the reader combination;

[0039] The sensor positioning unit is used to adjust the installation position of each sensor within the available installation range based on the signal coverage range of the remaining reader combinations.

[0040] Preferably, the distance between any two sensors is greater than a preset value.

[0041] The present invention provides a method for arranging passive wireless temperature sensors. By analyzing the building model, the setting position of each sensor is intelligently determined, ensuring that each sensor can be detected by a reader, greatly improving the arrangement efficiency, and ensuring the stability of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A flowchart of a method for arranging a passive wireless temperature sensor provided by an embodiment of the present invention;

[0043] Figure 2 A flowchart of the steps of importing a layout interval model provided by an embodiment of the present invention, closing the walls in the layout interval model, dividing the model into multiple layout spaces, and determining the number of sensors in each layout space according to the area of ​​the layout space;

[0044] Figure 3 A flowchart of the steps of constructing a detection grid based on a layout interval model, performing signal transmission simulation according to the detection grid, determining the signal coverage range when setting a reader in each detection grid, and obtaining transmission simulation data provided by an embodiment of the present invention;

[0045] Figure 4 A flowchart of the steps of constructing a reader combination based on transmission simulation data, determining signal coverage under different reader combinations, screening out reader combinations that meet preset conditions, and determining the positions of various sensors provided by an embodiment of the present invention;

[0046] Figure 5 An architectural diagram of a passive wireless temperature sensor deployment system provided by an embodiment of the present invention;

[0047] Figure 6 An architectural diagram of a space division module provided in an embodiment of the present invention;

[0048] Figure 7 An architecture diagram of a transmission simulation module provided by an embodiment of the present invention;

[0049] Figure 8 An architecture diagram of a position positioning module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0051] like Figure 1 FIG. 1 is a flow chart of a method for arranging a passive wireless temperature sensor provided by an embodiment of the present invention, the method comprising:

[0052] S100, acquiring a building model, dividing the building model into a plurality of layout intervals, and generating a plurality of layout interval models, wherein the projection area of ​​the layout interval models on a horizontal plane does not exceed a preset value.

[0053] In this step, the building model is obtained. When multiple passive wireless temperature sensors (hereinafter referred to as sensors) need to be set up in a certain intelligent building, the three-dimensional model of the corresponding intelligent building, that is, the building model, is obtained. The location of the wall and the location of the doors, windows or other openings in the building are recorded in the building model. The building model is divided into multiple layout intervals to facilitate the planning of the sensor location. When dividing, it can be divided according to area or according to floors. For example, the area of ​​a floor is divided into a layout interval, and the building model is divided accordingly to obtain multiple layout interval models. The projection area of ​​the layout interval model on the horizontal plane does not exceed the preset value. The sensor can be a SAW sensor or an RFID sensor.

[0054] S200, importing a layout interval model, closing the walls in the layout interval model, dividing the model into a plurality of layout spaces, and determining the number of sensors in each layout space according to the area of ​​the layout space.

[0055] In this step, the layout interval model is imported and loaded. When planning, features such as walls in the layout interval model are processed, and opening areas such as doors and windows are closed, thereby forming multiple closed layout spaces in the layout interval model. The layout spaces are used to set sensors. The number of sensors is determined according to the projection area of ​​the layout space. The larger the projection area, the more sensors are set, that is, the more sampling points are set in the space.

[0056] S300, constructing a detection grid based on the layout interval model, performing signal transmission simulation according to the detection grid, determining the signal coverage range when setting a reader in each detection grid, and obtaining transmission simulation data.

[0057] In this step, a detection grid is constructed based on the layout interval model. In order to determine the signal coverage area when the reader is set at different positions, the layout interval model is divided into multiple detection grids. Each detection grid is regarded as a location for installing a reader. The signal strength at each location when the reader is set in the detection grid is calculated based on the reader's parameter information and the wall's position information, thereby obtaining transmission simulation data.

[0058] S400, constructing a reader combination based on the transmission simulation data, determining signal coverage conditions under different reader combinations, screening out a reader combination that meets preset conditions, and determining the position of each sensor.

[0059] In this step, a reader combination is constructed based on the transmission simulation data. Since the range of each layout interval model is large and there are barriers (such as walls) in the layout interval model, setting a single reader cannot meet the demand for data reading of all sensors. Therefore, multiple readers may need to be set up in a layout interval model, and multiple detection grids are randomly selected. A virtual reader is set in each detection grid to determine the signal coverage range under this reader combination to determine whether the reading requirements are met. On the premise of determining the reader combination, the position of the sensor is further adjusted so that the sensor is located in the area with the strongest signal to ensure the stability of data transmission.

[0060] like Figure 2 As shown, as a preferred embodiment of the present invention, the steps of importing the layout interval model, closing the walls in the layout interval model, dividing the walls to obtain multiple layout spaces, and determining the number of sensors in each layout space according to the area of ​​the layout space specifically include:

[0061] S201, importing a layout interval model, and closing doors and windows in the layout interval model to form a plurality of layout spaces.

[0062] In this step, the layout interval model is imported. Since various openings are recorded in the original layout interval model, including doors or windows, the positions of the openings are filled to form a complete wall. Then the entire layout interval model will form multiple closed layout spaces.

[0063] S202, calculating the area of ​​the layout space, dividing the layout space whose area exceeds a preset value to obtain a plurality of sensor installation areas.

[0064] In this step, the area of ​​the layout space is calculated. First, the layout space is projected onto a horizontal plane to convert it into a plan view. The dimensions of the plan view are counted to calculate the projection area of ​​the layout space in the horizontal plane. A determination is made as to whether the layout space needs to be further divided based on a preset interval range. For example, if the interval range is set to 30 square meters, then when the projection area exceeds 30 square meters, it is further divided into multiple sensor installation areas. The projection area of ​​each sensor installation area does not exceed 30 square meters. When dividing, the layout space is equally divided in the vertical direction, and each sensor installation area includes a wall.

[0065] S203, determining the number of sensors in each sensor installation area according to a preset installation density, and determining the available installation range of each sensor according to a preset installation interval.

[0066] In this step, the number of sensors in each sensor installation area is determined according to the preset installation density. Specifically, one sensor can be installed in each sensor area. In order to ensure the installation effect, multiple sensors can be installed. The available installation range of each sensor is determined according to the preset installation interval. The installation interval can be 5 meters, that is, the distance between any two sensors is greater than 5 meters. The available installation range is the position of the wall surface in the sensor installation area.

[0067] like Figure 3 As shown, as a preferred embodiment of the present invention, the steps of constructing a detection grid based on the layout interval model, performing signal transmission simulation according to the detection grid, determining the signal coverage range when setting a reader in each detection grid, and obtaining transmission simulation data specifically include:

[0068] S301, constructing a detection grid based on the layout interval model, and dividing the entire layout interval model into a plurality of detection grids.

[0069] In this step, a detection grid is constructed based on the layout interval model. The detection grid is a cube of a preset size, such as a cube with a side length of 10 cm. The layout interval model is divided into multiple detection grids according to the size of the detection grid.

[0070] S302, screening the detection grids, eliminating the detection grids whose distances from the wall exceed a preset value, and selecting the point in the detection grid that is closest to the wall as the setting point.

[0071] In this step, the detection grids are screened. When setting up the reader, the installation position of the reader needs to be close to the wall for easy installation. If the distance between the detection grid and the wall is too far, it will increase the difficulty of installation. Therefore, by screening the detection grids, only the detection grids within 20 cm from the wall are retained. The retained detection grids are the setting points for setting the virtual reader.

[0072] S303, setting a virtual reader at each setting point, determining a corresponding signal coverage range according to parameters of the virtual reader, and generating transmission simulation data.

[0073] In this step, a virtual reader is set at each setting point, the parameters of the reader are called, the transmission power or transmission signal strength of the reader is determined, the wall information of the current intelligent building is obtained, and the absorption rate of the wall to the signal is determined according to the wall information. The center of the setting point is used as the transmission point, and the simulation signal is transmitted to the surrounding areas with the transmission point as the source. According to the absorption rate of the simulation signal in the air and the absorption rate in the wall, the signal strength loss of the signal passing through the air or wall of the corresponding distance is calculated to determine the signal strength value of each position in the entire space, and the signal strength data of each position is recorded to obtain transmission simulation data.

[0074] like Figure 4 As shown, as a preferred embodiment of the present invention, the steps of constructing a reader combination based on transmission simulation data, determining signal coverage under different reader combinations, screening out reader combinations that meet preset conditions, and determining the positions of each sensor specifically include:

[0075] S401, selecting a corresponding number of readers according to a preset number of combined readers to construct a reader combination, and determining a signal coverage range of each reader according to transmission simulation data.

[0076] In this step, a corresponding number of readers are selected according to a preset number of combined readers to construct a reader combination. The number of combined readers is determined according to the projected area of ​​the layout interval model. For example, if multiple area intervals are set, a corresponding number of combined readers are set in different area intervals. For example, if the area is 80-100 square meters, the number of combined readers is 3, that is, three readers are set in the layout interval model, and then three are randomly selected from all possible positions of the readers as a reader combination. For example, if the three readers A, B and C are selected, the signal strength in each area can be known by querying the transmission simulation data when the three readers work simultaneously.

[0077] S402, determining whether the signal coverage range of each reader combination covers all available installation ranges, and screening the reader combinations.

[0078] S403: Adjust the installation position of each sensor within the available installation range based on the signal coverage range of the remaining reader combinations.

[0079] In this step, it is determined whether the signal coverage range of each reader combination covers all available installation ranges. If the signal coverage range of a certain reader combination is small and some available installation ranges are not within the signal coverage range, it means that some sensors cannot be detected, and the reader combination is deleted. When the screening is completed, the reader combination with the least number of readers is selected, and the reader combination with the shortest distance between the reader and the wall is selected as the final configuration scheme of the reader. Based on this, the number of readers and the installation positions are determined, and the corresponding signal coverage range is determined accordingly. At this time, all available installation ranges are within the signal coverage range, and the coverage of each available installation range and the signal coverage range is determined. The overlapping area surrounded by the sensor is selected, and the position where the signal strength in the overlapping area is higher than the preset value is used as the installation position of the sensor. If there is no area with a signal strength higher than the preset value, there will be an overlapping position where the sensor is set in the signal coverage range of the reader, and the signal strength of the reader at the overlapping position is not lower than the minimum signal strength value; when the sensor is set in the overlapping area, if a single reader cannot successfully read the data of the sensor, it means that the energy transmitted to the sensor by the reader is insufficient for the regional sensor to work. At this time, the two groups of sensors corresponding to the overlapping area work synchronously and read the data of the sensor at the same time. When the external energy provided by the two groups of readers arrives at the same time, the energy received by the sensor will be increased, thereby driving the sensor to work to complete the data reading.

[0080] like Figure 5 As shown, a passive wireless temperature sensor arrangement system provided by an embodiment of the present invention includes:

[0081] The model building module 100 is used to obtain a building model, divide the building model into a plurality of layout intervals, and generate a plurality of layout interval models, wherein the projection area of ​​the layout interval models on the horizontal plane does not exceed a preset value.

[0082] In this system, the model building module 100 obtains the building model. When multiple passive wireless temperature sensors (hereinafter referred to as sensors) need to be set in a certain intelligent building, the three-dimensional model of the corresponding intelligent building, that is, the building model, is obtained. The location of the wall and the location of the doors, windows or other openings in the building are recorded in the building model. The building model is divided into multiple layout intervals to facilitate the planning of the sensor location. When dividing, it can be divided according to area or according to floors. For example, the area of ​​a floor is divided into a layout interval, and the building model is segmented accordingly to obtain multiple layout interval models. The projection area of ​​the layout interval model on the horizontal plane does not exceed the preset value. The sensor can be a SAW sensor or an RFID sensor.

[0083] The space division module 200 is used to import the layout interval model, close the walls in the layout interval model, divide it into multiple layout spaces, and determine the number of sensors in each layout space according to the area of ​​the layout space.

[0084] In this system, the space division module 200 imports the layout interval model and loads the layout interval model. When planning, the features such as walls in the layout interval model are processed, and opening areas such as doors and windows are closed, thereby forming multiple closed layout spaces in the layout interval model. The layout space is used to set sensors. The number of sensors is determined according to the projection area of ​​the layout space. The larger the projection area, the more sensors are set, that is, the more sampling points are set in the space.

[0085] The transmission simulation module 300 is used to construct a detection grid based on the layout interval model, perform signal transmission simulation according to the detection grid, determine the signal coverage when the reader is set in each detection grid, and obtain transmission simulation data.

[0086] In this system, the transmission simulation module 300 constructs a detection grid based on the layout interval model. In order to determine the signal coverage area when the reader is set at different positions, the layout interval model is divided into multiple detection grids, and each detection grid is regarded as a position where the reader is installed. The signal strength at each position when the reader is set in the detection grid is calculated based on the parameter information of the reader and the position information of the wall, and the transmission simulation data is obtained accordingly.

[0087] The position positioning module 400 is used to construct a reader combination based on the transmission simulation data, determine the signal coverage of different reader combinations, screen out the reader combination that meets the preset conditions, and determine the position of each sensor.

[0088] In this system, the position positioning module 400 constructs a reader combination based on the transmission simulation data. Since the range of each layout interval model is large and there are barriers (such as walls) in the layout interval model, setting a single reader cannot meet the demand for data reading of all sensors. Therefore, multiple readers may need to be set in a layout interval model, and multiple detection grids are randomly selected. A virtual reader is set in each detection grid to determine the signal coverage range under this reader combination to determine whether the reading requirements are met. On the premise of determining the reader combination, the position of the sensor is further adjusted so that the sensor is located in the area with the strongest signal to ensure the stability of data transmission.

[0089] like Figure 6 As shown, as a preferred embodiment of the present invention, the space division module 200 includes:

[0090] The model closing unit 201 is used to import the layout interval model and close the doors and windows in the layout interval model to form a plurality of layout spaces.

[0091] In this module, the model closure unit 201 imports the layout interval model. Since the original layout interval model records various openings, including doors or windows, the positions of the openings are filled to form a complete wall. Then the entire layout interval model will form multiple closed layout spaces.

[0092] The installation area division unit 202 is used to calculate the area of ​​the layout space, and divide the layout space whose area exceeds a preset value to obtain a plurality of sensor installation areas.

[0093] In this module, the installation area division unit 202 calculates the area of ​​the layout space. First, the layout space is projected onto a horizontal plane to convert it into a plan view. The size of the plan view is counted to calculate the projection area of ​​the layout space in the horizontal plane. According to a preset interval range, it is determined whether the layout space needs to be further divided. For example, if the interval range is set to 30 square meters, when the projection area exceeds 30 square meters, it is further divided into multiple sensor installation areas. The projection area of ​​each sensor installation area does not exceed 30 square meters. When dividing, the layout space is divided into equal parts along the vertical direction, and each sensor installation area includes a wall.

[0094] The installation range identification unit 203 is used to determine the number of sensors in each sensor installation area according to a preset installation density, and to determine the available installation range of each sensor according to a preset installation interval.

[0095] In this module, the installation range identification unit 203 determines the number of sensors in each sensor installation area according to the preset installation density. Specifically, one sensor can be installed in each sensor. In order to ensure the installation effect, multiple sensors can also be installed. The available installation range of each sensor is determined according to the preset installation interval. The installation interval can be 5 meters, that is, the distance between any two sensors is greater than 5 meters. The available installation range is the position of the wall surface in the sensor installation area.

[0096] like Figure 7 As shown, as a preferred embodiment of the present invention, the transmission simulation module 300 includes:

[0097] The model division unit 301 is used to construct a detection grid based on the layout interval model, and divide the entire layout interval model into multiple detection grids.

[0098] In this module, the model division unit 301 constructs a detection grid based on the layout interval model. The detection grid is a cube of a preset size, such as a cube with a side length of 10 cm. The layout interval model is divided into multiple detection grids according to the size of the detection grid.

[0099] The grid screening unit 302 is used to screen the detection grids, remove the detection grids whose distance from the wall exceeds a preset value, and select the point in the detection grid that is closest to the wall as the setting point.

[0100] In this module, the grid screening unit 302 screens the detection grids. When setting up the reader, the installation position of the reader needs to be close to the wall for easy installation. If the distance between the detection grid and the wall is too far, it will increase the difficulty of installation. Therefore, by screening the detection grids, only the detection grids within 20 cm from the wall are retained. The retained detection grids are the setting points for setting the virtual reader.

[0101] The simulation data generating unit 303 is used to set a virtual reader at each setting point, determine the corresponding signal coverage range according to the parameters of the virtual reader, and generate transmission simulation data.

[0102] In this module, the simulation data generation unit 303 sets a virtual reader at each setting point, calls the parameters of the reader, determines the transmission power or transmission signal strength of the reader, obtains the wall information of the current intelligent building, determines the absorption rate of the wall to the signal according to the wall information, takes the center of the setting point as the transmission point, and uses the transmission point as the source to transmit the simulation signal to the surrounding areas, calculates the signal strength loss of the signal passing through the air or wall at a corresponding distance according to the absorption rate of the simulation signal in the air and the absorption rate in the wall, so as to determine the signal strength value of each position in the entire space, and records the signal strength data of each position to obtain transmission simulation data.

[0103] like Figure 8 As shown, as a preferred embodiment of the present invention, the position positioning module 400 includes:

[0104] The signal simulation unit 401 is used to select a corresponding number of readers according to a preset number of combined readers to construct a reader combination, and determine the signal coverage of each reader according to the transmission simulation data.

[0105] In this module, the signal simulation unit 401 selects a corresponding number of readers according to a preset number of combined readers to construct a reader combination. The number of combined readers is determined according to the projected area of ​​the layout interval model. For example, if multiple area intervals are set, a corresponding number of combined readers are set in different area intervals. For example, if the area is 80-100 square meters, the number of combined readers is 3, that is, three readers are set in the layout interval model, and then three are randomly selected from all possible positions of the readers as a reader combination. For example, if the three readers A, B and C are selected, the signal strength in each area can be known by querying the transmission simulation data when the three readers work simultaneously.

[0106] The signal range screening unit 402 is used to determine whether the signal coverage range of each reader combination covers all available installation ranges, and screen the reader combinations.

[0107] The sensor positioning unit 403 is used to adjust the installation position of each sensor within the available installation range based on the signal coverage range of the remaining reader combinations.

[0108] In this module, the signal range screening unit 402 determines whether the signal coverage range under each reader combination involves all available installation ranges. If the signal coverage range under a certain reader combination is small and some available installation ranges are not within the signal coverage range, it means that some sensors cannot be detected, and the reader combination is deleted. When the screening is completed, the reader combination containing the least number of readers is selected, and the reader combination with the shortest distance between the reader and the wall is selected as the final configuration scheme of the reader. Based on this, the number of readers and the installation positions are determined, and the corresponding signal coverage range is determined accordingly. At this time, all available installation ranges are within the signal coverage range, and the overlapping area of ​​each available installation range and the signal coverage range is determined. The position in the overlapping area where the signal strength is higher than the preset value is used as the installation position of the sensor. If there is no area with a signal strength higher than the preset value, the sensor is set at the superimposed position of the signal coverage range of the reader, and the signal strength of the reader at the superimposed position is not lower than the minimum signal strength value.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for arranging a passive wireless temperature sensor, characterized in that: The method comprises: Acquire a building model, divide the building model into a plurality of layout intervals, and generate a plurality of layout interval models, wherein the projection area of ​​the layout interval models on a horizontal plane does not exceed a preset value; Import the layout interval model, close the walls in the layout interval model, divide it into multiple layout spaces, and determine the number of sensors in each layout space according to the area of ​​the layout space; Building a detection grid based on the layout interval model, performing signal transmission simulation according to the detection grid, determining the signal coverage when setting a reader in each detection grid, and obtaining transmission simulation data; Build reader combinations based on transmission simulation data, determine the signal coverage under different reader combinations, screen out reader combinations that meet preset conditions, and determine the locations of each sensor.

2. The method for arranging a passive wireless temperature sensor according to claim 1, characterized in that: The step of importing the layout interval model, closing the walls in the layout interval model, dividing the model into multiple layout spaces, and determining the number of sensors in each layout space according to the area of ​​the layout space specifically includes: Import the layout interval model, and close the doors and windows in the layout interval model to form multiple layout spaces; Calculate the area of ​​the layout space, divide the layout space whose area exceeds a preset value, and obtain multiple sensor installation areas; The number of sensors in each sensor installation area is determined according to a preset installation density, and the available installation range of each sensor is determined according to a preset installation interval.

3. The method for arranging a passive wireless temperature sensor according to claim 1, characterized in that: The steps of constructing a detection grid based on the layout interval model, performing signal transmission simulation according to the detection grid, determining the signal coverage range when setting a reader in each detection grid, and obtaining transmission simulation data specifically include: Building a detection grid based on the layout interval model, dividing the entire layout interval model into multiple detection grids; Screen the detection grids, remove the detection grids whose distance from the wall exceeds the preset value, and select the point in the detection grid closest to the wall as the setting point; A virtual reader is set at each setting point, and the corresponding signal coverage range is determined according to the parameters of the virtual reader to generate transmission simulation data.

4. The method for arranging a passive wireless temperature sensor according to claim 2, characterized in that: The steps of constructing a reader combination based on the transmission simulation data, determining the signal coverage under different reader combinations, screening out a reader combination that meets the preset conditions, and determining the position of each sensor specifically include: Selecting a corresponding number of readers according to a preset number of combined readers to construct a reader combination, and determining a signal coverage range of each reader according to transmission simulation data; Determine whether the signal coverage of each reader combination covers all available installation ranges, and screen the reader combinations; The sensor installation location within each available installation range is adjusted based on the signal coverage of the remaining reader combinations.

5. The method for arranging passive wireless temperature sensors according to claim 1, characterized in that: The distance between any two sensors is greater than the preset value.

6. A passive wireless temperature sensor deployment system, characterized in that: The system comprises: A model building module, used to obtain a building model, divide the building model into a plurality of layout intervals, and generate a plurality of layout interval models, wherein the projection area of ​​the layout interval models on a horizontal plane does not exceed a preset value; The space division module is used to import the layout interval model, close the walls in the layout interval model, divide it into multiple layout spaces, and determine the number of sensors in each layout space according to the area of ​​the layout space; A transmission simulation module is used to construct a detection grid based on the layout interval model, perform signal transmission simulation according to the detection grid, determine the signal coverage when the reader is set in each detection grid, and obtain transmission simulation data; The position positioning module is used to build a reader combination based on the transmission simulation data, determine the signal coverage under different reader combinations, screen out the reader combination that meets the preset conditions, and determine the position of each sensor.

7. The passive wireless temperature sensor arrangement system according to claim 6, characterized in that: The space division module comprises: A model closing unit is used to import a layout interval model and close the doors and windows in the layout interval model to form multiple layout spaces; An installation area division unit is used to calculate the area of ​​the layout space, and divide the layout space whose area exceeds a preset value to obtain multiple sensor installation areas; The installation range identification unit is used to determine the number of sensors in each sensor installation area according to a preset installation density, and to determine the available installation range of each sensor according to a preset installation interval.

8. The passive wireless temperature sensor arrangement system according to claim 6, characterized in that: The transmission simulation module comprises: A model division unit, used for constructing a detection grid based on the layout interval model, and dividing the entire layout interval model into a plurality of detection grids; A grid screening unit is used to screen the detection grids, remove the detection grids whose distance from the wall exceeds a preset value, and select the point in the detection grid closest to the wall as the setting point; The simulation data generating unit is used to set a virtual reader at each setting point, determine the corresponding signal coverage range according to the parameters of the virtual reader, and generate transmission simulation data.

9. The passive wireless temperature sensor arrangement system according to claim 7, characterized in that: The position positioning module comprises: A signal simulation unit, used for selecting a corresponding number of readers according to a preset number of combined readers to construct a reader combination, and determining a signal coverage range of each reader according to the transmission simulation data; A signal range screening unit, used to determine whether the signal coverage range of each reader combination covers all available installation ranges, and screen the reader combination; The sensor positioning unit is used to adjust the installation position of each sensor within the available installation range based on the signal coverage range of the remaining reader combinations.

10. The passive wireless temperature sensor arrangement system according to claim 6, characterized in that: The distance between any two sensors is greater than the preset value.

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