A temperature dynamic detection method of an environmental space test device based on multiple parameters

Abstract

The application discloses a kind of temperature dynamic detection methods of environmental space testing device based on multiple parameters, it is related to temperature detection technical field, to solve the dynamic efficient detection of environmental monitoring sensor without disassembling environmental monitoring sensor;The method mainly includes: according to the space condition, the environment space needs to be tested is constructed;Boundary conditions are set to the environment space;Dynamic detection model is created, the air flow in the environment space is analyzed, and the environment space testing device is placed;The parameters of the environment space testing device are initialized, the detection data of the environment space testing device is collected, the environmental data distribution of the environment space is calculated, and the measured data of the environmental monitoring sensor is dynamically detected, so that the environmental monitoring sensor is dynamically and efficiently detected without disassembling the environmental monitoring sensor, and the environmental temperature data distribution is dynamically displayed in real time through 2D / 3D picture.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of temperature detection, and in particular to a temperature dynamic detection method of an environmental space testing device based on multiple parameters. BACKGROUND

[0002] With the development of artificial intelligence and embedded technology, more and more environmental monitoring sensors for monitoring temperature, humidity, etc. are embedded in the interior of equipment or the interior of walls and cannot be disassembled. These environmental monitoring sensors must be calibrated or performance tested due to production needs. How to dynamically and efficiently detect the monitoring performance of the environmental monitoring sensor without disassembling the environmental monitoring sensor is a problem to be solved in the current temperature detection field.

[0003] Therefore, a multiple-parameter environmental space testing device is designed, and a temperature dynamic detection and calibration method is proposed based on the device. SUMMARY

[0004] The present application aims to solve the problem of inconvenient performance detection of environmental monitoring sensors in the prior art due to the embedding of environmental monitoring sensors in walls or equipment. A temperature dynamic detection method of an environmental space testing device based on multiple parameters is proposed. In the working condition of large-size space and non-disassembling of the environmental monitoring sensor, accurate dynamic detection and calibration evaluation can still be performed.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A temperature dynamic detection method of an environmental space testing device based on multiple parameters, comprising:

[0007] Constructing an environmental space to be tested according to the space conditions;

[0008] Setting boundary conditions for the environmental space;

[0009] Creating a dynamic detection model, analyzing the air flow in the environmental space, and placing the environmental space testing device;

[0010] Initializing the parameters of the environmental space testing device, collecting the detection data of the environmental space testing device, calculating the environmental data distribution of the environmental space, and dynamically detecting the environmental monitoring sensor.

[0011] Further preferably, the environmental space to be tested is constructed by measuring the length, width and height of the space conditions.

[0012] Further preferably, the method further comprises defining the air density, the air heat conduction coefficient, the air specific heat, the air conditioner outlet flow rate and the air conditioner outlet temperature.

[0013] Further preferably, the method further comprises creating a dynamic detection model and analyzing the air flow in the environmental space by placing the environmental space testing device in the following manner:

[0014] The created dynamic detection model is expressed as follows:

[0015] ;

[0016] In the above formula, is the air density; is the air conditioner outlet velocity; is the detection time; represents the divergence; represents the gradient; is the generalized variable, which represents the air conditioner outlet temperature; is the diffusion coefficient of ; is the generalized source term;

[0017] The air flow in the environmental space satisfies the mass conservation principle, which is expressed as follows:

[0018] ;

[0019] In the above formula, is the mass fraction of component ; is the air conditioner outlet velocity vector, is the diffusion flux of component ; is the dynamic source term of component ;

[0020] ;

[0021] ;

[0022] In the above formula, is the diffusion coefficient of component ; is the air viscosity coefficient, is the turbulent Schmidt number, is the air velocity component, is the air internal resistance factor, is the medium permeability;

[0023] Based on the expression of the dynamic detection model, the temperature cloud chart and the air speed cloud chart of the environment space are obtained, the air flow in the environment space is analyzed, and the environment space testing device is placed in a stable air flow environment.

[0024] Preferably, the parameters of the initialized environment space testing device include the distance between the standard sensors of the environment space testing device, the temperature of the environment space testing device, the air conditioning set temperature, the air thermal conductivity, and the height of the environment space.

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

[0026] The environmental data distribution of the environment space is calculated by the following formula:

[0027] ;

[0028] ;

[0029] ;

[0030] In the above formula, is the thermal resistance of air, is the distance between the two standard sensors of the environment space testing device, is the cross-sectional area perpendicular to the heat flow direction, is the air thermal conductivity; is the heat flow (the amount of heat passing through a certain cross section per unit time, a physical quantity used to measure the rate of heat transfer, with the unit of watt (W)), is the temperature of the standard sensor at known position 1, is the temperature of the standard sensor at known position 2; is the temperature at a certain unknown position obtained by calculation (x, y, and z represent the length, width, and height of the environment space, respectively), is the temperature at known position 3, is the air thermal resistance at the position where the temperature needs to be calculated;

[0031] Based on the calculated temperature , the temperature at any position between the standard sensors is obtained, and the temperature distribution of the environment monitoring sensor and the environment space is dynamically detected.

[0032] Preferably, the environment space testing device comprises:

[0033] The standard sensor of the data transmission terminal is placed in a stable air flow area in the environment space to collect temperature data of the environment space.

[0034] The total communication terminal establishes a communication connection with the standard sensor through the data communication terminal, and receives the collected data of the standard sensor.

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

[0036] Compared with the prior art, the beneficial effects of the present application are: the present application constructs an environmental space for the to-be-detected area, sets boundary conditions based on the parameters to be detected and calibrated, creates a dynamic detection model, analyzes the placement position of the detection end of the environmental space test device, further obtains the environmental data distribution of the environmental space based on the detection data of the environmental space test device, thereby realizing dynamic and efficient detection of the performance of the environmental monitoring sensor (the detected sensor) without disassembling the environmental monitoring sensor, and providing a new application means for the measurement and detection of environmental data by displaying the detected environmental data distribution in real time and dynamically on the system screen through a 2D / 3D picture. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a flow chart of the environmental space temperature dynamic detection in the embodiment of the present application;

[0038] Figure 2 is a logical structure correlation diagram of the environmental space test device in the embodiment of the present application;

[0039] Figure 3 is an air speed cloud chart of the environmental space in the embodiment of the present application;

[0040] Figure 4 is a standard sensor placement position diagram of the environmental space test device based on the air speed cloud chart in the embodiment of the present application;

[0041] Figure 5 is a temperature 3D dynamic diagram displayed through the screen by the control system software in the embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and beneficial effects of the present application clearer, the specific embodiments of the present application will be described in detail below with reference to the drawings. The present embodiment is only a preferred example of the present application, which is used to assist understanding of the inventive concept and does not constitute a limitation on the protection scope.

[0043] In this embodiment, the application of the temperature dynamic detection calibration method will be introduced in detail by taking the temperature detection of the environmental space as an example, and the overall application process of the present embodiment is as shown in Figure 1

[0044] ​The environmental space testing device in the embodiment, Figure 2 The logical structure correlation schematic diagram of the environmental space testing device with integrated multi-parameters is shown in FIG. 1. The environmental space testing device comprises five standard sensors (standard sensor 1-standard sensor 5) for collecting parameter data of temperature, humidity, atmospheric pressure, wind speed and rainfall. In actual use, the required detection data can be read according to the requirement. Each standard sensor is configured with a data receiving terminal, and is connected with a total communication terminal (Lora one-to-many technology is adopted, one total communication terminal controls multiple data receiving terminals). The total communication terminal transmits the sampling frequency to the outside, and the data receiving terminal collects the corresponding data according to the instruction, and then transmits the data collected by the standard sensor to the total communication terminal. The total communication terminal uploads the corresponding data to the storage.

[0045] The environmental space testing device in the embodiment further comprises a control system (control software), and the functions of the control system include: establishing a control connection with the standard sensor through the total 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, and displaying the temperature, humidity, atmospheric pressure, rainfall and wind speed through the 2D / 3D scene distribution, and simultaneously performing data analysis.

[0046] According to the space condition, the environmental space to be tested is constructed:

[0047] According to the space condition, the environmental space to be tested is constructed by measuring the length, width and height of the space condition. The environmental space adopts a 3D plane analysis method. The length of the environmental space is 20 m, the width is 10 m, and the height is 3 m.

[0048] The boundary condition of the environmental space is set:

[0049] The boundary condition of the environmental space includes defining the air density, air heat conduction coefficient, air specific heat, air conditioner outlet flow rate and air conditioner outlet temperature. The data table of the boundary condition set in the embodiment is shown in Table 1.

[0050] Table 1 Boundary condition data table

[0051]

[0052] A dynamic detection model is created to analyze the air flow in the environmental space. The environmental space testing device is placed in the following manner:

[0053] Firstly, the expression of the created dynamic detection model is as follows:

[0054] (1);

[0055] wherein, is air density; is air outlet velocity of air conditioner; is detection time; represents divergence; represents gradient; is generalized variable, which represents air outlet temperature of air conditioner here; is diffusion coefficient of component is generalized source term, which is defined as a flow force in the region of porous medium according to an empirical assumption. In the technical solution, a dynamic source term is essentially superimposed on the momentum equation, and the source term is composed of two parts: viscous loss term and internal loss term. And the difference between the main flow direction and the non-main flow direction is not more than 1000 times.

[0056] The air flowing in the environment space conforms to the principle of mass conservation, and the following formula is used to represent:

[0057] (2);

[0058] In the above formula, is mass fraction of component ; is air outlet velocity vector of air conditioner, represents diffusion flux of component , which is generated by concentration gradient; is dynamic source term of component ;

[0059] (3);

[0060] (4);

[0061] In the above formula, represents diffusion coefficient of component , represents air viscosity coefficient, represents turbulent Schmidt number, is air velocity component (x, y, z direction), is air internal resistance factor, is medium permeability;

[0062] Solution and analysis of dynamic detection model:

[0063] Based on the expression of the above dynamic detection model, the time step and step length of the solution are defined, and the above dynamic detection model is solved in combination with the measured data to obtain the air velocity nephogram of the environment space, as shown in Figure 3 , 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.

[0064] Location distribution of environmental space testing equipment:

[0065] 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 is indicated 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.

[0066] 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.

[0067] Temperature data acquisition:

[0068] 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:

[0069] 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.

[0070] Table 2 Initialization Environment Space Test Device Parameter Information Table

[0071]

[0072] Spatial parameter input:

[0073] The distance of the known 3D space defining the environmental space, the length, width and height space distance between two standard sensor measurement positions, and the temperature values of the standard sensors at two position points A and B are defined. According to the information in Table 2, the initial temperature of point A close to the air conditioner is 24.3℃, the initial temperature of point B slightly far away is 25.6℃, the distance between point A and point B is 10m (such as Figure 4 point B is in the horizontal positive direction of point A), and the space height Y direction is 3m.

[0074] The environmental data distribution of the environmental space is calculated by the following formula:

[0075] (5) ;

[0076] In the above formula, is the thermal resistance of air ( ), is the temperature unit in Kelvin, is the distance between the standard sensors of the two environmental space test devices at points A and B ( ), is the cross-sectional area perpendicular to the heat flow direction ( ), is the air thermal conductivity ( ).

[0077] The thermal resistance of air is calculated according to formula (5):

[0078] ;

[0079] The heat flow at points A and B is calculated, and the calculation formula is as follows:

[0080] (6) ;

[0081] In the above formula, is the heat flow (the amount of heat passing through a certain cross section per unit time, a physical quantity used to measure the rate of heat transfer, with the unit of watt ), is the temperature of the standard sensor at known position 1 (B in this embodiment), is the temperature of the standard sensor at known position 2 (A in this embodiment); where the temperature of point B is 25.6℃ and the temperature of point A is 24.3℃, then according to formula (6) we can get:

[0082] ;

[0083] Temperature algorithm calculation:

[0084] ​The temperature at other positions is calculated, according to formula (5) and formula (6), and the heat flow in the same direction is approximately equal in the same environmental space, so the temperature at any position in the same direction relative to other positions can be calculated, and the calculation formula is shown as formula (7):

[0085] (7);

[0086] In the above formula, is the temperature at a certain unknown position obtained by calculation (x, y, and z represent the length, width, and height of the environmental space in three directions, respectively), is the temperature at the known position 3 (here, it refers to the position of point B), is the air thermal resistance at the position where the temperature needs to be calculated;

[0087] According to the above information, the temperature of point B is 25.6°C, and the temperature at a position 5m away from point B in the horizontal positive direction is calculated according to formula (7) as follows:

[0088]

[0089]

[0090] Here, when calculating the temperature at a position 5m away from point B in the horizontal positive direction, the air thermal resistance at this position is taken as a negative value. Generally, the direction of heat flow is from high temperature to low temperature, and the negative sign before the air thermal resistance in the calculation formula represents the opposite direction, from low temperature to high temperature. According to the above calculation method, the temperature at a position 5m away from point B in the horizontal positive direction is calculated as 26.2°C.

[0091] Therefore, the technical solution can infer the temperature values that cannot be directly measured by sensors in the length, width, and height directions through the measured values of standard sensor temperatures, and calculate the temperature at any position between any two points among A, B, C, D, and E. The actual measured temperature of the environmental monitoring sensor (i.e., the detected sensor) is dynamically detected, and the purpose of detecting the performance of the environmental monitoring sensor without disassembly is achieved.

[0092] 2D / 3D scene display:

[0093] Further extending the above scheme, the above algorithm is compiled into system software, and the 3D space distance to be calculated in the environmental space is defined. The x, y, and z values are input for the 3D space to be calculated, and x, y, and z represent the length, width, and height of the 3D space, respectively. For example, in this example, the length of the environmental space is 20m, the width is 10m, and the height is 3m. After compiling the control system software, the screen display result is as shown in Figure 5 .

[0094] ​​The temperature dynamic detection method of the environment space test device based on multiple parameters disclosed in the embodiment has the functions of multiple parameter collection, can test temperature, humidity, atmospheric pressure, wind speed and rainfall parameters, has the functions of data collection, data analysis and 2D / 3D scene reproduction, and uses simulation analysis technology to analyze the influence of air flow rate on temperature in a specific scene during testing, so that the standard sensors of the environment space test device are distributed at positions where the influence of air flow rate is minimum, and temperature data are collected; according to the collected temperature data, the temperature distribution of different space positions is calculated in combination with the air thermal conductivity and the space distance between the standard sensors of the environment space test device, so that the performance of the environment monitoring sensor can be dynamically and efficiently detected without disassembling the environment monitoring sensor (the detected sensor). It has been proved that the scheme can realize the collection of temperature, humidity, atmospheric pressure, wind speed and rainfall parameters, and the reproduction and dynamic display of 2D / 3D environment scene parameters.

[0095] Although the steps are described in the above-mentioned order in the above-mentioned embodiments, it can be understood by those skilled in the art that, in order to achieve the effects of the embodiments, the steps do not have to be executed in such an order, and can be executed simultaneously (in parallel) or in a reversed order, and these simple changes are within the protection scope of the present application.

[0096] Those skilled in the art can understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments means to be within the scope of the present application and form different embodiments. For example, in the claims of the present application, any one of the claimed embodiments can be used in any combination.

[0097] It should be noted that the above-mentioned embodiments illustrate the present application but do not limit the present application, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, the word "comprise" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" before the elements does not exclude the presence of multiple such elements. The present application can be implemented by means of hardware including several different elements and by means of a properly programmed PC.

[0098] The technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but it should be noted that the parts not involved in the present application are the same as or can be implemented by using the prior art. It is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will all fall within the protection scope of the present application.

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; 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.

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 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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