Temperature dynamic detection method of environment space testing device based on multiple parameters

Abstract

The invention discloses a temperature dynamic detection method of an environment space testing device based on multiple parameters, relates to the technical field of temperature detection, and aims to dynamically and efficiently detect an environment monitoring sensor under the condition that the environment monitoring sensor is not disassembled. The method mainly comprises the following steps: constructing an environment space needing to be tested according to a space condition; setting boundary conditions for the environment space; creating a dynamic detection model, analyzing air flow in the environment space, and placing an environment space testing device; the method comprises the following steps: initializing parameters of an environment space testing device, collecting detection data of the environment space testing device, calculating environment data distribution of an environment space, and dynamically detecting actually measured data of an environment monitoring sensor, so that the environment monitoring sensor is dynamically and efficiently detected under the condition that the environment monitoring sensor is not disassembled; and the environment temperature data distribution is dynamically displayed in real time through a 2D / 3D picture.

Description

Technical Field

[0001] This invention relates to the field of temperature detection technology, and in particular to a dynamic temperature detection method based on a multi-parameter environmental space testing device. Background Technology

[0002] With the development of artificial intelligence and embedded technology, more and more environmental monitoring sensors used to monitor temperature, humidity and other parameters are being embedded inside devices or walls and cannot be removed. However, these environmental monitoring sensors must be calibrated or tested for performance due to production needs. How to dynamically and efficiently test the monitoring performance of environmental monitoring sensors without disassembling them is an urgent problem to be solved in the field of temperature detection.

[0003] To this end, we designed a multi-parameter environmental space testing device and proposed a dynamic temperature detection and calibration method based on the device. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies where environmental monitoring sensors are embedded in walls or equipment, making performance testing inconvenient. The invention proposes a dynamic temperature detection method based on a multi-parameter environmental space testing device, which enables accurate dynamic detection and calibration evaluation even in large spaces where the environmental monitoring sensors are not removable.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for dynamic temperature detection based on a multi-parameter environmental space testing device includes:

[0007] Construct the required testing environment based on the available space conditions;

[0008] Set boundary conditions for the environmental space;

[0009] Create a dynamic detection model, analyze airflow within the environmental space, and place environmental space testing devices.

[0010] Initialize the parameters of the environmental space testing device, collect the detection data of the environmental space testing device, calculate the environmental data distribution of the environmental space, and dynamically detect the environmental monitoring sensors.

[0011] In a further preferred embodiment of this scheme, the environmental space to be tested is constructed based on the spatial conditions by measuring the length, width, and height of the spatial conditions.

[0012] In a further preferred embodiment of this scheme, the setting of boundary conditions for the environmental space includes: defining air density, air thermal conductivity, air specific heat, air outlet velocity, and air outlet temperature.

[0013] In a further preferred embodiment of this scheme, the creation of a dynamic detection model, analysis of airflow within the environmental space, and placement of the environmental space testing device are carried out in the following manner:

[0014] The expression for the created dynamic detection model is as follows:

[0015] ;

[0016] In the formula, air density; The airflow speed at the air conditioner outlet; For detection time; Indicates divergence; Represents the gradient; This is a generalized variable, representing the temperature at the air conditioner's outlet. for The diffusion coefficient; For generalized source terms;

[0017] Air follows the law of conservation of mass during its flow in the environment, as expressed by the following formula:

[0018] ;

[0019] In the above formula, Components The mass fraction; For the air conditioner outlet velocity vector, Indicates components The diffusion flux; Components The power source item;

[0020] ;

[0021] ;

[0022] In the above formula, Indicates components diffusion coefficient, Indicates the air viscosity coefficient. Represents the turbulent Schmidt number. For air velocity components, The air internal drag factor, For medium permeability;

[0023] Based on the expression of the above dynamic detection model, temperature cloud map and air velocity cloud map of the environmental space are obtained, air flow in the environmental space is analyzed, and the environmental space testing device is placed in an environment with stable air flow.

[0024] In a further preferred embodiment of this scheme, the parameters of the initialization environmental space testing device include the distance between the standard sensors of the initialization environmental space testing device, the temperature of the environmental space testing device, the air conditioning set temperature, the air thermal conductivity, and the height of the environmental space.

[0025] The detection data collected by the environmental space testing device is the temperature data at the location of the environmental space testing device.

[0026] The environmental data distribution in the environmental space is calculated using the following formula:

[0027] ;

[0028] ;

[0029] ;

[0030] In the above formula, The thermal resistance of air. This refers to the distance between two standard sensors in an environmental space testing device. The cross-sectional area is perpendicular to the direction of heat flow. The thermal conductivity of air; Heat flow (the amount of heat passing through a cross-section per unit time, a physical quantity used to measure the rate of heat transfer, measured in watts (W)). Given the temperature of a standard sensor at a known location 1, The temperatures of two standard sensors at known locations; To obtain the temperature at an unknown location through calculation (x, y, z represent the length, width, and height of the environment space, respectively). Given the temperature at location 3, The thermal resistance of the air at the temperature that needs to be calculated;

[0031] Temperature obtained based on calculations It can acquire the temperature at any location between standard sensors and dynamically detect the temperature distribution of environmental monitoring sensors and the ambient space.

[0032] In a further preferred embodiment of this scheme, the environmental space testing device includes:

[0033] A standard sensor configured for data transmission and reception terminals is placed in an area of ​​stable airflow within the ambient space to collect temperature data of the ambient space.

[0034] The main communication terminal establishes a communication connection with the standard sensor through the data receiving and transmitting terminal, and receives the data collected by the standard sensor;

[0035] The control system establishes a control connection with the standard sensor through the main communication terminal, sets the sampling frequency of the standard sensor to control data sampling, and displays the environmental data collected by the standard sensor in real time on the screen.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention constructs an environmental space for the area to be tested, sets boundary conditions based on the parameters to be tested and calibrated, creates a dynamic testing model, analyzes the placement position of the testing end of the environmental space testing device, and further obtains the environmental data distribution of the environmental space based on the testing data of the environmental space testing device. Thus, it can achieve dynamic and efficient testing of the performance of the environmental monitoring sensor (the sensor under test) without disassembling it, and dynamically displays the detected environmental data distribution on the system screen in real time through 2D / 3D graphics, providing a new application method for the metrological testing of environmental data. Attached Figure Description

[0037] Figure 1 This is a flowchart of the dynamic detection of ambient space temperature in an embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the logical configuration of the environmental space testing device in an embodiment of the present invention; Figure 3 This is an air velocity cloud map of the environmental space in an embodiment of the present invention; Figure 4 This is a schematic diagram of the standard sensor placement position of the environmental space testing device based on air velocity cloud map in an embodiment of the present invention; Figure 5 This is a 3D dynamic temperature diagram displayed on the screen by the control system software compiled in this embodiment of the invention. Detailed Implementation

[0038] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the specific embodiments of this invention will be described in detail below with reference to the accompanying drawings. These embodiments are merely preferred examples of this invention, used to aid in understanding the inventive concept, and do not constitute a limitation on the scope of protection.

[0039] This embodiment will use actual application data, taking ambient space temperature detection as an example, to detail the application of the dynamic temperature detection and calibration method. The overall application process of this embodiment is as follows: Figure 1 As shown.

[0040] The environmental space testing device in this embodiment Figure 2The diagram illustrates the logical structure of an integrated multi-parameter environmental space testing device. This device includes five standard sensors (Standard Sensor 1-Standard Sensor 5) for collecting parameter data on temperature, humidity, atmospheric pressure, wind speed, and rainfall. In practical use, the required detection data can be read as needed. Each standard sensor is equipped with a data transceiver terminal and establishes a connection with a central communication terminal (using LoRa one-to-many technology, where one central communication terminal controls multiple data transceivers). The central communication terminal transmits sampling frequencies, the data transceivers collect corresponding data according to instructions, and then transmit the data collected by the standard sensors to the central communication terminal, which then uploads the corresponding data to its memory.

[0041] The environmental space testing device in this embodiment also includes a control system (control software), whose functions include: establishing a control connection with the standard sensor through the main communication terminal, setting the sampling frequency of the standard sensor to control data sampling, displaying the environmental data collected by the standard sensor through the screen, displaying temperature, humidity, atmospheric pressure, rainfall and wind speed in the form of 2D / 3D scene distribution, and performing data analysis at the same time.

[0042] Construct the required testing environment based on the available space conditions:

[0043] The test environment is constructed based on the spatial conditions. The test environment is constructed by measuring the length, width and height of the spatial conditions. The environmental space is analyzed using a 3D planar method. The measured length of the environmental space is 20m, the width is 10m and the height is 3m.

[0044] Set boundary conditions for the environmental space:

[0045] Setting boundary conditions for the environmental space includes defining air density, air thermal conductivity, air specific heat, air outlet velocity, and air outlet temperature. The data table for the boundary conditions set in this embodiment is shown in Table 1.

[0046] Table 1 Boundary Condition Data Table

[0047]

[0048] A dynamic detection model is created to analyze airflow within the environmental space. An environmental space testing device is then placed as follows:

[0049] First, the expression for the created dynamic detection model is as follows:

[0050] (1);

[0051] In the formula, air density; The airflow speed at the air conditioner outlet; For detection time; Indicates divergence; Represents the gradient; This is a generalized variable, representing the temperature at the air conditioner's outlet. for The diffusion coefficient; The generalized source term is defined as a flow kinetic force, primarily based on empirical assumptions, combined within a region of the porous medium. In this technical solution, it essentially involves superimposing a kinetic source term onto the momentum equation. This source term consists of two parts: a viscous loss term and an internal loss term. Furthermore, the difference between the source term and the non-source term in the mainstream and non-mainstream directions does not exceed 1000 times.

[0052] Air follows the law of conservation of mass during its flow in the environment, as expressed by the following formula:

[0053] (2);

[0054] In the above formula, Components The mass fraction; For the air conditioner outlet velocity vector, Indicates components The diffusion flux is generated by the concentration gradient; Components The power source item;

[0055] (3);

[0056] (4);

[0057] In the above formula, Indicates components diffusion coefficient, Indicates the air viscosity coefficient. Represents the turbulent Schmidt number. For air velocity components (x, y, z directions). The air internal drag factor, For medium permeability;

[0058] Solving and analyzing the dynamic detection model:

[0059] Based on the expression of the above dynamic detection model, the time step and step size are defined for solving the problem. Combined with measured data, the dynamic detection model is solved to obtain an air velocity cloud map of the ambient space, such as... Figure 3 As shown, Figure 3The blue area represents the region with the most stable airflow velocity (i.e., the region with the most stable airflow in the environmental space), the green area represents the region with relatively gentle airflow velocity, and the yellow to red area represents the region where the airflow velocity gradually increases to the maximum. When analyzing the airflow in the environmental space, the environmental space test device is easily affected by the environment and generally needs to be placed in a stable environment, and cannot be placed in a place with strong airflow.

[0060] Location distribution of environmental space testing equipment:

[0061] Based on the obtained air velocity cloud map of the ambient space, the environmental space testing device is placed in an environment with stable airflow, such as... Figure 4 As shown, Figure 4 The exhibit showcases an environmental space testing device based on Figure 3 The placement location is shown in the diagram. Figure 4 Standard sensors for the environmental space testing device are placed at points A, B, C, D, and E to measure temperature data at those locations.

[0062] This technical solution features a digital twin display function. It calculates the temperature conditions at different spatial locations based on the collected temperature data and the thermal conductivity of the air, and displays the results in 2D / 3D.

[0063] Temperature data acquisition:

[0064] Initialize the parameters of the environmental space testing device, collect the detection data of the environmental space testing device, calculate the environmental data distribution of the environmental space, and dynamically detect the environmental monitoring sensors:

[0065] The initialization parameters for the environmental space testing device include the distance between the standard sensors, the temperature of the environmental space testing device, the air conditioning set temperature, the air thermal conductivity, and the height of the environmental space. Temperature data at the location of the environmental space testing device is collected as the detection data for the device. Specifically, the standard sensors of the environmental space testing device are configured according to... Figure 4 The locations of the five points A, B, C, D, and E are distributed as follows: the temperature data collected by the standard sensors at locations A and B is used as the initial temperature; the distance between the two standard sensors, the thermal conductivity of the air, and the temperature set by the air conditioner are used to initialize the environmental space testing device. The parameter information table of the environmental space testing device is initialized as shown in Table 2.

[0066] Table 2 Initialization Environment Space Test Device Parameter Information Table

[0067]

[0068] Spatial parameter input:

[0069] Define the known 3D spatial distances within the environment, define the length, width, and height spatial distances between the two standard sensor measurement positions, and define the temperature values ​​of the standard sensors at points A and B. According to the information in Table 2, point A, closer to the air conditioner, has an initial temperature of 24.3℃, while point B, slightly farther away, has an initial temperature of 25.6℃. The distance between points A and B is 10m (e.g., ...). Figure 4 Point B is in the horizontal positive direction from point A, and its spatial height in the Y direction is 3m.

[0070] The environmental data distribution in the environmental space is calculated using the following formula:

[0071] (5);

[0072] In the above formula, Thermal resistance of air ( ), Calvin is the unit of temperature. The distance between the standard sensors of the two environmental space testing devices at points A and B ( ), The cross-sectional area perpendicular to the direction of heat flow ( ), air thermal conductivity ( ).

[0073] Calculate the thermal resistance of air according to formula (5). value:

[0074] ;

[0075] The formula for calculating the heat flow between points A and B is as follows:

[0076] (6);

[0077] In the above formula, Heat flux (the amount of heat passing through a cross-section per unit time) is a physical quantity used to measure the rate of heat transfer; its unit is watt. ), The temperature of the standard sensor at a known location 1 (location B in this embodiment) is... Let B be the temperature of the standard sensor at location 2 (location A in this embodiment); where the temperature at point B is 25.6℃ and the temperature at point A is 24.3℃. Then, according to formula (6), we can obtain:

[0078] ;

[0079] Temperature calculation algorithm:

[0080] To calculate the temperature at other locations, based on formulas (5) and (6), it is approximately assumed that the heat flow is approximately equal in the same environmental space and in the same direction. Therefore, the temperature at any location relative to other locations in the same direction can be calculated, and the calculation formula is shown in (7).

[0081] (7);

[0082] In the above formula, To obtain the temperature at an unknown location through calculation (x, y, z represent the length, width, and height of the environment space, respectively). The temperature at location 3 is known (referring to the location of point B). The thermal resistance of the air at the temperature that needs to be calculated;

[0083] Based on the above information, the temperature at point B is 25.6℃. The temperature at a horizontal distance of 5m from point B is calculated using formula (7):

[0084] ;

[0085] ;

[0086] When calculating the temperature at a location 5m away from point B in the positive horizontal direction, the air thermal resistance at that location is taken as a negative value. Generally, heat flow direction is from high temperature to low temperature; the negative sign before the air thermal resistance in the calculation formula indicates the opposite direction, from low temperature to high temperature. Following the above calculation method, the temperature at a location 5m away from point B in the positive horizontal direction is calculated to be 26.2℃.

[0087] Therefore, this technical solution can infer the temperature values ​​that cannot be directly measured by the sensor in the length, width, and height directions by using the temperature measured by the standard sensor, and calculate the temperature at any position between any two points A, B, C, D, and E, so as to dynamically detect the measured temperature of the environmental monitoring sensor (i.e., the sensor under test) and achieve the purpose of testing the performance of the environmental monitoring sensor without disassembly.

[0088] 2D / 3D scene display:

[0089] Further extending the above solution, the algorithm is compiled into the system software. The 3D spatial distance to be calculated in the environment space is defined. For the 3D space to be calculated, x, y, and z values ​​are input respectively, where x, y, and z represent the length, width, and height of the 3D space. For example, in this instance, the environment space is 20m long, 10m wide, and 3m high. After compilation by the control system software, the result is displayed on the screen as follows: Figure 5 As shown.

[0090] This embodiment discloses a method for dynamic temperature detection based on a multi-parameter environmental space testing device. This device has multi-parameter acquisition capabilities, enabling the testing of temperature, humidity, atmospheric pressure, wind speed, and rainfall. It also features data acquisition, data analysis, and 2D / 3D scene reproduction functions. During testing, simulation technology is used to analyze the impact of airflow velocity on temperature for specific scenarios. Standard sensors of the environmental space testing device are distributed in locations with minimal airflow velocity influence to collect temperature data. Based on the collected temperature data, combined with air thermal conductivity and the spatial distance between the standard sensors, the temperature distribution at different spatial locations is calculated. This allows for dynamic and efficient testing of the environmental monitoring sensor's performance without disassembling the sensor under test. Practical experience has shown that this solution can acquire temperature, humidity, atmospheric pressure, wind speed, and rainfall parameters, and reproduce and dynamically display 2D / 3D environmental scene parameters.

[0091] Although the steps in the above embodiments are described in the above order, those skilled in the art will understand that in order to achieve the effect of this embodiment, different steps do not need to be executed in such an order. They can be executed simultaneously (in parallel) or in a reverse order. These simple variations are all within the protection scope of this invention.

[0092] Those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims of this invention, any of the claimed embodiments can be used in any combination.

[0093] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, the word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed PC.

[0094] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it should be noted that the parts not covered in this invention are the same as or can be implemented using existing technology. It will be readily understood by those skilled in the art that the scope of protection of this invention is obviously not limited to these specific embodiments. Without departing from the principles of this invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions resulting from these changes or substitutions will all fall within the scope of protection of this invention.

Claims

1. A method for dynamic temperature detection based on a multi-parameter environmental space testing device, characterized in that, include: Construct the required testing environment based on the available space conditions; Set boundary conditions for the environmental space; Create a dynamic detection model, analyze airflow within the environmental space, and place environmental space testing devices. Initialize the parameters of the environmental space testing device, collect the detection data of the environmental space testing device, calculate the environmental data distribution of the environmental space, and dynamically detect the environmental monitoring sensors.

2. The method for dynamic temperature detection of an environmental space testing device based on multiple parameters according to claim 1, characterized in that, The test environment is constructed based on the spatial conditions by measuring the length, width, and height of the spatial conditions.

3. The method for dynamic temperature detection based on a multi-parameter environmental space testing device according to claim 1, characterized in that, The boundary conditions for setting the environmental space include: defining air density, air thermal conductivity, air specific heat, air outlet velocity, and air outlet temperature.

4. The method for dynamic temperature detection of an environmental space testing device based on multiple parameters according to claim 1, characterized in that, The creation of a dynamic detection model, analysis of airflow within the environmental space, and placement of the environmental space testing device are carried out as follows: The expression for the created dynamic detection model is as follows: ； In the formula, air density; The airflow speed at the air conditioner outlet; For detection time; Indicates divergence; Represents the gradient; For generalized variables, The diffusion coefficient is a generalized variable. For generalized source terms; Air follows the law of conservation of mass during its flow in the environment, as expressed by the following formula: ； In the above formula, Components The mass fraction; For the air conditioner outlet velocity vector, Indicates components The diffusion flux; Components The power source item; ； ； In the above formula, Indicates components diffusion coefficient, Indicates the air viscosity coefficient. Represents the turbulent Schmidt number. For air velocity components, The air internal drag factor, For medium permeability; Based on the expression of the dynamic detection model, temperature cloud map and air velocity cloud map of the environmental space are obtained, the air flow in the environmental space is analyzed, and the environmental space test device is placed in an environment with stable air flow.

5. The method for dynamic temperature detection of an environmental space testing device based on multiple parameters according to claim 1, characterized in that, The parameters of the initialization environmental space testing device include the distance between the standard sensors of the initialization environmental space testing device, the temperature of the environmental space testing device, the air conditioning set temperature, the air thermal conductivity, and the height of the environmental space. The detection data collected by the environmental space testing device is the temperature data at the location of the environmental space testing device. The environmental data distribution in the environmental space is calculated using the following formula: ； ； ； In the above formula, The thermal resistance of air. This refers to the distance between two standard sensors in an environmental space testing device. The cross-sectional area is perpendicular to the direction of heat flow. The thermal conductivity of air; For heat flow, Given the temperature of a standard sensor at a known location 1, The temperatures of two standard sensors at known locations; To obtain the temperature at an unknown location through calculation, Given the temperature at location 3, The thermal resistance of the air at the temperature that needs to be calculated; It acquires the temperature at any location between standard sensors and dynamically detects the temperature distribution of environmental monitoring sensors and the surrounding space.

6. The method for dynamic temperature detection of an environmental space testing device based on multiple parameters according to claim 1, characterized in that, The environmental space testing device includes: A standard sensor configured for data transmission and reception terminals is placed in an area of ​​stable airflow within the ambient space to collect temperature data of the ambient space. The main communication terminal establishes a communication connection with the standard sensor through the data receiving and transmitting terminal, and receives the data collected by the standard sensor; The control system establishes a control connection with the standard sensor through the main communication terminal, sets the sampling frequency of the standard sensor to control data sampling, and displays the environmental data collected by the standard sensor in real time on the screen.

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