CN114965860A - Fire safety monitoring system for fire in working environment based on flame-retardant plate flame-retardant test - Google Patents
Fire safety monitoring system for fire in working environment based on flame-retardant plate flame-retardant test Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/06—Physical fire-barriers
- A62C2/10—Fire-proof curtains
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
The invention discloses an operating environment fire safety monitoring system based on flame-retardant board flame-retardant test, belonging to the technical field of flame-retardant test, comprising a flame-retardant board test information confirmation module, a flame-retardant board reference performance test module, a flame-retardant board reference flame-retardant information acquisition module, a flame-retardant board reference performance analysis module, a flame-retardant board limit flame-retardant test setting module, a flame-retardant board limit flame-retardant information acquisition module, a flame-retardant board limit performance analysis module and a cloud storage platform, wherein the qualified condition of the flame-retardant board is judged by analyzing the corresponding reference performance and limit performance of the flame-retardant board, the problems of single flame-retardant board and one surface of the flame-retardant board in the prior art are solved, the multi-dimensional analysis of the flame-retardant performance of the flame-retardant board is realized, the authenticity and scientificity of test data are greatly improved, and the accurate judgment of the environmental protection performance of the target flame-retardant board is realized by analyzing the environmental protection performance of the flame-retardant board, thereby reducing the hidden trouble of environmental protection in the use process of the subsequent flame-retardant plate.
Description
Technical Field
The invention belongs to the technical field of flame-retardant tests, and relates to an operating environment fire safety monitoring system based on a flame-retardant plate flame-retardant test.
Background
When a fire disaster occurs, the flame-retardant property of the flame-retardant plate can block the fire, greatly reduce the spreading speed of the fire disaster and the discharge amount of smoke, provide more escape opportunities and rescue time for escape personnel and rescue personnel, and therefore, the flame-retardant plate is very important for performing flame-retardant test.
The current method for performing flame-retardant test on the flame-retardant plate comprises a horizontal combustion test method and a vertical combustion test method, wherein the horizontal combustion test method is to fix the flame-retardant plate in a combustion box, observe the combustion condition of the flame-retardant plate by adjusting the distance of a fire source, and the vertical combustion test method is to fix the flame-retardant plate in the combustion box, and observe the combustion condition of the flame-retardant plate by controlling the combustion time of the fire source, so that the test method has the following problems obviously: 1. the flame-retardant test of present fire-retardant board still stops at a test method control a variable then carries out flame-retardant test to fire-retardant board, test data is less, and the test result has unicity and one-sidedness, the analytic process when carrying out flame-retardant analysis to fire-retardant board on the one hand is comparatively rough, can't reflect the accuracy and the reliability of flame-retardant test result, and then can't judge the fire-retardant characteristic of fire-retardant board fine or not, can't ensure flame-retardant test's effect, on the other hand this method only can observe the fire-retardant condition of limit of fire-retardant board, can't detect out the environmental information that fire-retardant board corresponds at fire-retardant in-process, and then can't judge the qualified circumstances that fire-retardant board environmental protection can correspond, can't reduce fire-retardant board simultaneously to the healthy influence degree of personnel and to the pollution degree of environment.
2. The flame retardant property lower limit test is not carried out to fire-retardant board to prior art, can't know the fire-retardant condition of lower limit of fire-retardant board performance to can't provide effectual data for personnel's rational use fire-retardant board, can't ensure fire-retardant board's utilization ratio and result of use, also reduce the referential and objectivity of fire-retardant board test result simultaneously, and then can't embody the quality of fire-retardant board.
Disclosure of Invention
The invention aims to provide an operating environment fire safety monitoring system based on a flame-retardant plate flame-retardant test, which solves the problems in the background art.
The purpose of the invention can be realized by the following technical scheme: operation environment conflagration fire safety monitoring system based on fire-retardant board fire resistance test includes: the device comprises a flame-retardant board test information confirmation module, a flame-retardant board reference performance test module, a flame-retardant board reference flame-retardant information acquisition module, a flame-retardant board reference performance analysis module, a flame-retardant board limit flame-retardant test setting module, a flame-retardant board limit flame-retardant information acquisition module, a flame-retardant board limit performance analysis module and a cloud storage platform.
The flame retardant plate test information confirming module is used for obtaining the model corresponding to the target test flame retardant plate, positioning the flame retardant grade interval corresponding to the target test flame retardant plate from the cloud storage platform, recording the lower limit value of the flame retardant grade interval as the standard flame retardant, recording the upper limit value corresponding to the flame retardant grade interval as the limit flame retardant, and extracting the standard test information corresponding to the standard flame retardant of the target test flame retardant plate from the cloud storage platform, wherein the test information comprises the fire level, the fire source distance and the burning duration.
The flame retardant plate standard performance testing module is used for adjusting the automatic flame generating device according to standard testing information corresponding to target testing flame retardant plate standard flame retardance, further starting the automatic flame generating device to carry out standard flame retardant performance testing, and starting an automatic fire extinguishing device in the experiment cabin to carry out automatic fire extinguishing after the testing is finished.
And the flame-retardant board reference flame-retardant information acquisition module is used for acquiring damaged parameters corresponding to the target test flame-retardant board after the reference performance test is completed and environment information corresponding to the experiment chamber, wherein the damaged information comprises damaged area and damaged thickness, and the environment information comprises carbon dioxide concentration, toxic gas concentration and smoke concentration.
And the flame retardant board reference performance analysis module is used for analyzing the damaged parameters corresponding to the target test flame retardant board after the reference performance test and the environment information corresponding to the experimental cabin, and judging the standard flame retardant performance and the standard environmental protection performance corresponding to the target test flame retardant board.
The flame-retardant board limit flame-retardant test setting module is used for extracting standard test information corresponding to the limit flame retardance of a target test flame-retardant board from a cloud storage platform, setting the test types based on the standard test information corresponding to the limit flame retardance of the target flame-retardant board, and dividing each test type into a plurality of test groups, wherein the test types comprise a fire level test type, a fire source distance test type and a combustion duration test type, so that test information corresponding to each test group corresponding to each test type and each test group in each test type is obtained, the limit flame-retardant performance of the target test flame-retardant board is tested in sequence according to the test information corresponding to each test group in each test type, and then after the test is finished, an automatic fire extinguishing device in an experiment cabin is started to automatically extinguish fire.
And the flame retardant plate limit flame retardant information acquisition module is used for acquiring damaged information corresponding to the target flame retardant plate in each experiment group in each experiment type after the limit flame retardant test is finished and environmental information corresponding to the experiment cabin.
The flame retardant board limit performance analysis module is used for screening out limit performance test experiment groups corresponding to the target test flame retardant board from each experiment type, and analyzing test information corresponding to the limit test experiment groups in each experiment type and environment information corresponding to the experiment cabin after the limit flame retardant test is completed, so that the limit flame retardant performance and the limit environmental protection performance corresponding to the target test flame retardant board are qualified.
Optionally, the damaged parameters corresponding to the target test flame retardant panel and the environmental information corresponding to the experimental chamber after the benchmark performance test is completed are collected, and the specific collection process is as follows: and acquiring a three-dimensional image corresponding to the target test flame-retardant plate after the standard performance test is finished, and further positioning the damaged area and the damaged thickness corresponding to the target test flame-retardant plate.
The carbon dioxide sensor, the toxic gas detector and the smoke sensor are arranged above the experiment cabin, and environmental information in the experiment cabin is collected in sequence, wherein the environmental information is collected before the automatic fire extinguishing step.
Optionally, the damaged parameters of the flame retardant plate corresponding to the target test flame retardant plate after the benchmark performance test is completed are analyzed, and the specific analysis is as follows: substituting the damaged parameters of the flame-retardant plate corresponding to the target test flame-retardant plate after the benchmark performance test is completed into a calculation formula
Obtaining the damage coincidence coefficient corresponding to the target test flame-retardant plate
，
、
Respectively representing the damaged area and the damaged thickness corresponding to the target test flame-retardant board after the standard performance test is finished,
、
the permissible damaged area and thickness of the target flame-retardant plate stored in the cloud storage platform are respectively,
、
and the weight factors are respectively corresponding to the area and the thickness of the set flame-retardant plate.
Optionally, the environment information corresponding to the experiment chamber corresponding to the target test flame retardant panel after the benchmark performance test is completed is analyzed, and the specific analysis is as follows: substituting corresponding environmental information of the experiment chamber corresponding to the target test flame-retardant plate after the target test flame-retardant plate completes the standard performance test into a calculation formula
In the method, a reference environmental protection influence coefficient corresponding to the target test flame-retardant plate is obtained
Wherein
、
、
Respectively represents the initial smoke concentration, the carbon dioxide concentration and the toxic gas concentration of the experiment chamber,
、
、
respectively representing the smoke concentration, the carbon dioxide concentration and the toxic gas concentration corresponding to the experimental chamber after the standard performance test is finished,
、
、
respectively setting the allowable smoke release concentration difference, the allowable carbon dioxide release concentration difference and the allowable toxic gas release concentration difference of the experimental chamber after the standard performance test is finished,
、
、
and the weight factors are respectively corresponding to the smoke concentration, the carbon dioxide concentration and the toxic gas concentration in the set experiment chamber.
Optionally, the standard flame retardant performance and the standard environmental protection performance corresponding to the target test flame retardant sheet are subjected to qualification judgment, and the specific judgment process is as follows: and comparing the damaged conformity coefficient corresponding to the target test flame-retardant plate with the damaged conformity coefficient corresponding to the set standard flame-retardant plate, if the damaged conformity coefficient corresponding to the target test flame-retardant plate is greater than or equal to the damaged conformity coefficient corresponding to the set standard flame-retardant plate, judging that the standard flame-retardant performance corresponding to the target test flame-retardant plate is qualified, otherwise, judging that the standard flame-retardant performance corresponding to the target test flame-retardant plate is unqualified.
And comparing the reference environment-friendly influence coefficient corresponding to the target test flame-retardant plate with the set reference environment-friendly influence coefficient corresponding to the standard flame-retardant plate, if the reference environment-friendly influence coefficient corresponding to the target test flame-retardant plate is less than or equal to the set reference environment-friendly influence coefficient corresponding to the standard flame-retardant plate, judging that the environment-friendly performance corresponding to the target test flame-retardant plate is qualified, otherwise, judging that the environment-friendly performance corresponding to the target test flame-retardant plate is unqualified.
Optionally, the limit performance test experiment group corresponding to the target test flame retardant plate is screened from each experiment type, and the specific screening process is as follows: and extracting damage parameters of the target test flame-retardant plate corresponding to each experimental group in each experimental type after the limit performance test is finished, further counting to obtain comprehensive damage coefficients corresponding to each experimental group in each experimental type, sequencing the comprehensive damage coefficients corresponding to each experimental group in each experimental type from large to small, and selecting the experimental group corresponding to the largest comprehensive damage coefficient in each experimental type as the limit performance test group corresponding to each experimental type.
Optionally, the test information corresponding to the limit test performance test group in each test type after the limit flame retardant performance test is completed is analyzed, and the specific analysis process is as follows: and extracting the corresponding fire grade in the limit performance experimental group in the fire grade test type, recording the fire grade as the limit fire grade corresponding to the target flame-retardant plate, and analyzing to obtain the qualified coefficient of the flame-retardant fire grade corresponding to the target flame-retardant plate.
Extracting the corresponding fire source distance in the limit performance experimental group in the fire source distance test type, recording the distance as the limit fire source distance, and further calculating according to a calculation formula
Obtaining the corresponding flame-retardant distance qualification coefficient of the target test flame-retardant plate
Wherein L represents the standard fire source distance corresponding to the limit flame retardance of the target test flame retardant plate,
representing the limit fire source distance corresponding to the target test flame-retardant plate;
extracting corresponding combustion duration in the limit performance experimental group in the combustion duration test type, recording the combustion duration as the limit combustion duration, and further calculating according to a calculation formula
Obtaining the corresponding flame-retardant time length qualification coefficient of the target test flame-retardant plate
Wherein T represents the standard burning time length corresponding to the limit flame retardance of the target test flame retardant plate,
and (4) representing the limit burning time corresponding to the target test flame-retardant plate.
Optionally, the environmental information corresponding to the experimental chamber after the ultimate flame retardant performance test is analyzed, and the specific analysis is as follows: extracting the environmental information in the limit performance test group in each experiment type, comparing the environmental information, screening out the maximum carbon dioxide concentration, the maximum toxic gas concentration and the maximum formaldehyde concentration, and further according to a calculation formula
Obtaining the limit environmental protection influence coefficient corresponding to the target test flame-retardant plate
Wherein
、
、
Respectively represents the maximum smoke concentration, the maximum carbon dioxide concentration and the maximum toxic gas concentration corresponding to the experiment chamber,
、
、
respectively obtaining the allowable smoke release concentration difference, the allowable carbon dioxide release concentration difference and the allowable toxic gas release concentration difference after the set limit flame retardant performance test is completed.
Optionally, the qualification judgment of the ultimate flame retardant property and the ultimate environmental protection property corresponding to the target test flame retardant panel is performed in the following specific judgment process: the method comprises the following steps of firstly, judging the limit flame retardant property corresponding to a target test flame retardant plate to be qualified, and specifically comprising the following steps: and A1, comparing the qualified coefficient of the limit fire level corresponding to the target test flame-retardant board with the qualified coefficient of the standard limit fire level corresponding to the set standard target test flame-retardant board, and if the qualified coefficient of the limit fire level corresponding to the target test flame-retardant board is greater than or equal to the qualified coefficient of the standard limit fire level corresponding to the standard target test flame-retardant board, judging that the flame-retardant fire level corresponding to the target test flame-retardant board is qualified.
And A2, comparing the qualified coefficient of the flame-retardant distance corresponding to the target test flame-retardant plate with the qualified coefficient of the flame-retardant distance corresponding to the set standard target test flame-retardant plate, and if the qualified coefficient of the flame-retardant distance corresponding to the target test flame-retardant plate is greater than or equal to the qualified coefficient of the flame-retardant distance corresponding to the standard target test flame-retardant plate, judging that the distance of the flame-retardant fire source corresponding to the target test flame-retardant plate is qualified.
A3, comparing the qualified coefficient of the flame retardant duration corresponding to the target test flame retardant board with the qualified coefficient of the flame retardant duration corresponding to the set standard target test flame retardant board, and if the qualified coefficient of the flame retardant duration corresponding to the target test flame retardant board is greater than or equal to the qualified coefficient of the flame retardant duration corresponding to the standard target test flame retardant board, judging that the flame retardant duration corresponding to the target test flame retardant board is qualified.
A4, when the flame-retardant fire behavior grade, the flame-retardant fire source distance and the flame-retardant duration of the target test flame-retardant plate are all qualified, judging that the ultimate flame-retardant performance corresponding to the target test flame-retardant plate is qualified, otherwise, judging that the ultimate flame-retardant performance corresponding to the target test flame-retardant plate is unqualified.
And secondly, judging the limit environmental protection performance corresponding to the target test flame retardant plate to be qualified, comparing the limit environmental protection influence coefficient corresponding to the target test flame retardant plate with the limit environmental protection influence coefficient corresponding to the set standard flame retardant plate, and judging the environmental protection performance corresponding to the target test flame retardant plate to be qualified if the limit environmental protection influence coefficient corresponding to the target test flame retardant plate is less than or equal to the limit environmental protection influence coefficient corresponding to the standard flame retardant plate.
Optionally, the system further comprises a cloud storage platform, wherein the cloud storage platform is used for storing size information corresponding to each flame-retardant board type number, allowable damaged size information, a flame-retardant grade interval, standard test information corresponding to each flame-retardant grade, and initial environment information in the experiment chamber, and the size information includes an area and a thickness.
Compared with the prior art, the invention has the following beneficial effects: 1. the invention provides a fire safety monitoring system for fire in working environment based on flame-retardant plate flame-retardant test, on one hand, by analyzing the corresponding reference performance and limit performance of the target test flame-retardant plate, thereby further judging the qualified condition of the target test flame-retardant board, solving the problems of single and one-sided test flame-retardant board in the prior art, realizing multi-dimensional analysis of the flame-retardant performance of the flame-retardant board, greatly improving the authenticity and scientificity of test data, thereby improving the reliability and objectivity of the flame retardant property analysis result of the flame retardant plate, on the other hand, realizing the accurate judgment of the qualified condition of the environmental protection property of the target flame retardant plate by analyzing the environmental information after the test is finished, and then the potential safety hazard and the potential environmental protection hazard in the follow-up use of fire-retardant board have been reduced, environmental protection nature and reliability in the follow-up use have been ensured simultaneously.
2. According to the invention, the corresponding damaged parameters of the target test flame-retardant board after the standard performance test is completed and the corresponding environmental information of the experimental cabin are acquired by the standard flame-retardant information acquisition module of the flame-retardant board, so that a bedding is set for the subsequent analysis of the standard flame-retardant performance and the standard environmental protection performance of the target test flame-retardant board, the accuracy of the standard performance test result of the flame-retardant board is effectively improved, meanwhile, a reasonable reference is provided for the reasonable selection of the flame-retardant board by the subsequent personnel, and the utilization rate and the use effect of the flame-retardant board are greatly improved.
3. According to the invention, the flame-retardant board limit flame-retardant test setting module is used for dividing a plurality of test experiment groups through standard test information based on the limit flame-retardant correspondence of the target flame-retardant board, so that a foundation is laid for the subsequent analysis of the limit flame-retardant performance corresponding to the target flame-retardant board, and the limit flame-retardant performance of the target flame-retardant board can be reflected more intuitively, so that the authenticity of a flame-retardant test result is greatly improved, the accuracy of the quality judgment of personnel on the flame-retardant board is favorably improved, and on the other hand, the inhibition effect of open fire on a fire scene is intuitively displayed through the test of the limit performance of the flame-retardant board, so that powerful guarantee is provided for people to escape, the casualties on the fire scene are reduced, the development of rescue activities of rescuers is facilitated, enough rescue time is won for rescuers, and the rescue effect is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a module connection structure according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention is shown in figure 1, and the fire safety monitoring system for fire in working environment based on the fire resistance test of the fire resistance plate comprises: the device comprises a flame-retardant board test information confirmation module, a flame-retardant board reference performance test module, a flame-retardant board reference flame-retardant information acquisition module, a flame-retardant board reference performance analysis module, a flame-retardant board limit flame-retardant test setting module, a flame-retardant board limit flame-retardant information acquisition module, a flame-retardant board limit performance analysis module and a cloud storage platform.
The flame-retardant board reference performance testing module is connected with the flame-retardant board test information confirmation module and the flame-retardant board reference flame-retardant information acquisition module respectively, the flame-retardant board reference performance analysis module is connected with the flame-retardant board reference flame-retardant information acquisition module and the cloud storage platform respectively, the flame-retardant board limit flame-retardant testing setting module is connected with the flame-retardant board test information confirmation module and the flame-retardant board reference flame-retardant information acquisition module respectively, the flame-retardant board limit performance analysis module is connected with the flame-retardant board limit flame-retardant information acquisition module and the cloud storage platform respectively, and the cloud storage platform is further connected with the flame-retardant board test information confirmation module.
The flame retardant plate test information confirming module is used for obtaining the model corresponding to the target test flame retardant plate, positioning the flame retardant grade interval corresponding to the target test flame retardant plate from the cloud storage platform, recording the lower limit value of the flame retardant grade interval as the standard flame retardant, recording the upper limit value corresponding to the flame retardant grade interval as the limit flame retardant, and extracting the standard test information corresponding to the standard flame retardant of the target test flame retardant plate from the cloud storage platform, wherein the test information comprises the fire level, the fire source distance and the burning duration.
And the flame retardant plate standard performance testing module is used for adjusting the automatic flame generating device according to standard testing information corresponding to the target test flame retardant plate standard flame retardance, further starting the automatic flame generating device to perform a standard flame retardant performance test, and starting an automatic fire extinguishing device in the experiment cabin to perform automatic fire extinguishing after the test is completed.
In one embodiment, after the benchmark performance test is completed, the automatic fire extinguishing process of the automatic fire extinguishing device is as follows: the open fire detector is installed above the experiment chamber, after the target analysis flame-retardant plate completes the benchmark performance test, the flame generating device is closed, the open fire position is determined through the open fire detector, meanwhile, the fire extinguishing instruction of the automatic fire extinguishing device is started, the open fire detection step is repeated, and when the open fire detector cannot detect open fire, the automatic fire extinguishing device is closed.
It should be noted that the automatic fire extinguishing device is also used for guaranteeing the safety in the testing process, and the specific steps are as follows: in the testing process, the open fire detector monitors the outside of a testing area in the experimental cabin, if open fire is detected outside the testing area, the flame generating device is closed, the test is stopped, a fire extinguishing instruction of the automatic fire extinguishing device is started, the open fire detecting step is repeated, and when the open fire detector cannot detect open fire, the automatic fire extinguishing device is closed.
According to the embodiment of the invention, the open fire detector and the fire extinguishing device are arranged to detect and extinguish the open fire in the testing process, so that dangerous accidents in the testing process can be found in time, if an accidental fire occurs in the testing process, a fire source can be found quickly and the fire can be extinguished quickly, the danger in the testing process is greatly reduced, and the safety of the experiment chamber is ensured.
And the flame-retardant board reference flame-retardant information acquisition module is used for acquiring damaged parameters corresponding to the target test flame-retardant board after the reference performance test is completed and environment information corresponding to the experiment chamber, wherein the damaged information comprises damaged area and damaged thickness, and the environment information comprises carbon dioxide concentration, toxic gas concentration and smoke concentration.
It is noted that toxic gases include, but are not limited to, carbon monoxide, formaldehyde, sulfur dioxide, and nitrogen dioxide.
It should be noted again that the inside of the test chamber is completely closed, and there is no communication between the inside of the test chamber and the external environment during the test.
According to the invention, the damaged parameters corresponding to the target test flame-retardant board after the standard performance test is completed and the environment information corresponding to the experiment chamber are collected, so that a cushion is arranged for the subsequent analysis of the standard flame-retardant performance and the standard environmental protection performance of the target test flame-retardant board, the accuracy of the standard performance test result of the flame-retardant board is effectively improved, meanwhile, an effective reference is provided for the reasonable selection of the flame-retardant board by the subsequent personnel, and the utilization rate and the use effect of the flame-retardant board are greatly improved.
In a specific embodiment, the damaged parameters corresponding to the target test flame retardant panel and the environmental information corresponding to the experimental chamber after the benchmark performance test is completed are collected, and the specific collection process is as follows: and acquiring a three-dimensional image corresponding to the target test flame-retardant plate after the standard performance test is finished, and further positioning the damaged area and the damaged thickness corresponding to the target test flame-retardant plate.
The carbon dioxide sensor, the toxic gas detector and the smoke sensor are arranged above the experiment cabin, and environmental information in the experiment cabin is collected in sequence, wherein the environmental information is collected before the automatic fire extinguishing step.
And the flame retardant board reference performance analysis module is used for analyzing the damaged parameters corresponding to the target test flame retardant board after the reference performance test and the environment information corresponding to the experimental cabin, and judging the standard flame retardant performance and the standard environmental protection performance corresponding to the target test flame retardant board.
In a specific embodiment, the damage parameters of the flame retardant board corresponding to the target test flame retardant board after the benchmark performance test is completed are analyzed, and the specific analysis is as follows: substituting the damaged parameters of the flame-retardant plate corresponding to the target test flame-retardant plate after the benchmark performance test is completed into a calculation formula
Obtaining the corresponding damage coincidence coefficient of the target test flame-retardant plate
，
、
Respectively representing the damaged area and the damaged thickness corresponding to the target test flame-retardant board after the standard performance test is finished,
、
the permissible damaged area and thickness of the target flame-retardant plate stored in the cloud storage platform are respectively,
、
and the weight factors are respectively corresponding to the area and the thickness of the set flame-retardant plate.
In another embodiment, the environmental information corresponding to the test chamber corresponding to the target test flame retardant panel after the benchmark performance test is completed is analyzed, and the specific analysis is carried outThe following: substituting corresponding environment information of the experiment chamber corresponding to the target test flame-retardant plate after the target test flame-retardant plate completes the benchmark performance test into a calculation formula
Obtaining a reference environmental protection influence coefficient corresponding to the target test flame-retardant plate
Wherein
、
、
Respectively represents the initial smoke concentration, the carbon dioxide concentration and the toxic gas concentration of the experiment chamber,
、
、
respectively representing the smoke concentration, the carbon dioxide concentration and the toxic gas concentration corresponding to the experimental chamber after the standard performance test is finished,
、
、
respectively setting the allowable smoke release concentration difference, the allowable carbon dioxide release concentration difference and the allowable toxic gas release concentration difference of the experimental chamber after the standard performance test is finished,
、
、
and the weight factors are respectively corresponding to the smoke concentration, the carbon dioxide concentration and the toxic gas concentration in the set experiment chamber.
In another embodiment, the standard flame retardant performance and the standard environmental protection performance corresponding to the target test flame retardant sheet are qualified, and the specific judgment process is as follows: and comparing the damaged coincidence coefficient corresponding to the target test flame-retardant plate with the damaged coincidence coefficient corresponding to the set standard flame-retardant plate, if the damaged coincidence coefficient corresponding to the target test flame-retardant plate is greater than or equal to the damaged coincidence coefficient corresponding to the set standard flame-retardant plate, judging that the standard flame-retardant performance corresponding to the target test flame-retardant plate is qualified, otherwise, judging that the standard flame-retardant performance corresponding to the target test flame-retardant plate is unqualified.
And comparing the reference environment-friendly influence coefficient corresponding to the target test flame-retardant plate with the set reference environment-friendly influence coefficient corresponding to the standard flame-retardant plate, if the reference environment-friendly influence coefficient corresponding to the target test flame-retardant plate is less than or equal to the set reference environment-friendly influence coefficient corresponding to the standard flame-retardant plate, judging that the environment-friendly performance corresponding to the target test flame-retardant plate is qualified, otherwise, judging that the environment-friendly performance corresponding to the target test flame-retardant plate is unqualified.
The flame-retardant board limit flame-retardant test setting module is used for extracting standard test information corresponding to the flame retardance of the limit of a target test flame-retardant board from a cloud storage platform, setting the test types based on the standard test information corresponding to the flame retardance of the limit of the target flame-retardant board, and dividing each test type into a plurality of test groups.
In the above method, the standard test information corresponding to the limit flame retardance of the target flame retardant sheet may be: the fire grade is 5.0, the fire source distance is 10 cm, and the burning time is 20 minutes, wherein the fire grade test type experimental group is set as shown in table 1, the fire source distance test type experimental group is set as shown in table 2, and the burning time length test type experimental group is set as shown in table 3;
TABLE 1
TABLE 2
TABLE 3
According to the invention, a plurality of test experiment groups are divided based on the standard test information corresponding to the limit flame retardance of the target flame retardant plate, so that a foundation is laid for the subsequent analysis of the limit flame retardant performance corresponding to the target flame retardant plate, meanwhile, the limit flame retardant performance of the target flame retardant plate can be reflected more intuitively, the authenticity of a flame retardant test result is greatly improved, the accuracy of the quality judgment of personnel on the flame retardant plate is favorably improved, on the other hand, through the test on the limit flame retardant plate, the suppression effect of open fire on the fire scene is intuitively displayed, a powerful guarantee is provided for people to escape, the casualties on the fire scene are reduced, meanwhile, the rescue activities of rescuers are facilitated, enough rescue time is obtained for the rescuers, and the rescue effect is improved.
And the flame-retardant plate limit flame-retardant information acquisition module is used for acquiring damaged information corresponding to the target flame-retardant plate in each experiment group in each experiment type and environment information corresponding to the experiment cabin after the limit flame-retardant test is finished.
And the flame retardant plate limit performance analysis module is used for screening out limit performance test experiment groups corresponding to the target test flame retardant plate from each experiment type, analyzing test information corresponding to the limit test experiment groups in each experiment type and environment information corresponding to the experiment chamber after limit flame retardant test is finished, and further judging the limit flame retardant performance and the limit environmental protection performance corresponding to the target test flame retardant plate to be qualified.
In a specific embodiment, the limit performance test experiment group corresponding to the target test flame retardant plate is screened from each experiment type, and the specific screening process is as follows: and extracting damage parameters of the target test flame-retardant plate corresponding to each experimental group in each experimental type after the limit performance test is finished, further counting to obtain comprehensive damage coefficients corresponding to each experimental group in each experimental type, sequencing the comprehensive damage coefficients corresponding to each experimental group in each experimental type from large to small, and selecting the experimental group corresponding to the largest comprehensive damage coefficient in each experimental type as the limit performance test group corresponding to each experimental type.
In the above, each experiment type is numbered as 1, 2, a
Wherein
、
Respectively represent the jth of the ith experiment typeThe damaged area and the damaged thickness corresponding to the experimental group,
、
the coefficient factors are respectively corresponding to the set damaged area and the damaged thickness.
In another specific embodiment, the test information corresponding to the limit test performance test group in each test type after the limit flame retardant performance test is completed is analyzed, and the specific analysis process is as follows: and extracting the corresponding fire grade in the limit performance experimental group in the fire grade test type, recording the fire grade as the limit fire grade corresponding to the target flame-retardant plate, and analyzing to obtain the qualified coefficient of the flame-retardant fire grade corresponding to the target flame-retardant plate.
Extracting the corresponding fire source distance in the limit performance experiment group in the fire source distance test type, recording the fire source distance as the limit fire source distance, and further recording the fire source distance as a calculation formula
Obtaining the corresponding flame-retardant distance qualification coefficient of the target test flame-retardant plate
Wherein L represents the standard fire source distance corresponding to the limit flame retardance of the target test flame retardant plate,
and indicating the limit fire source distance corresponding to the target test flame-retardant plate.
Extracting corresponding combustion duration in the limit performance experimental group in the combustion duration test type, recording the combustion duration as the limit combustion duration, and further calculating according to a calculation formula
Obtaining the corresponding flame-retardant time length qualification coefficient of the target test flame-retardant plate
Wherein T represents the standard burning time length corresponding to the limit flame retardance of the target test flame retardant plate,
and (4) representing the limit burning time corresponding to the target test flame-retardant plate.
In another embodiment, the environmental information corresponding to the test chamber after the completion of the flame retardant performance test is analyzed, specifically as follows: extracting the environmental information in the limit performance test group in each experiment type, comparing the environmental information, screening out the maximum carbon dioxide concentration, the maximum toxic gas concentration and the maximum formaldehyde concentration, and further according to a calculation formula
Obtaining the limit environmental protection influence coefficient corresponding to the target test flame-retardant plate
Wherein
、
、
Respectively represents the maximum smoke concentration, the maximum carbon dioxide concentration and the maximum toxic gas concentration corresponding to the experiment chamber,
、
、
respectively the allowable smoke release concentration difference, the allowable carbon dioxide release concentration difference and the allowable toxic gas release concentration difference after the set limit flame retardant performance test is finished.
In another specific embodiment, the ultimate flame retardant performance and the ultimate environmental protection performance corresponding to the target test flame retardant sheet are qualified, and the specific judgment process is as follows: the method comprises the following steps of firstly, judging the limit flame retardant property corresponding to a target test flame retardant plate to be qualified, and specifically comprising the following steps: and A1, comparing the qualified coefficient of the limit fire level corresponding to the target test flame-retardant board with the qualified coefficient of the standard limit fire level corresponding to the set standard target test flame-retardant board, and if the qualified coefficient of the limit fire level corresponding to the target test flame-retardant board is greater than or equal to the qualified coefficient of the standard limit fire level corresponding to the standard target test flame-retardant board, judging that the flame-retardant fire level corresponding to the target test flame-retardant board is qualified.
And A2, comparing the qualified coefficient of the flame-retardant distance corresponding to the target test flame-retardant plate with the qualified coefficient of the flame-retardant distance corresponding to the set standard target test flame-retardant plate, and if the qualified coefficient of the flame-retardant distance corresponding to the target test flame-retardant plate is greater than or equal to the qualified coefficient of the flame-retardant distance corresponding to the standard target test flame-retardant plate, judging that the distance of the flame-retardant fire source corresponding to the target test flame-retardant plate is qualified.
And A3, comparing the qualified coefficient of the flame retardant duration corresponding to the target test flame retardant board with the qualified coefficient of the flame retardant duration corresponding to the set standard target test flame retardant board, and if the qualified coefficient of the flame retardant duration corresponding to the target test flame retardant board is greater than or equal to the qualified coefficient of the flame retardant duration corresponding to the standard target test flame retardant board, judging that the flame retardant duration corresponding to the target test flame retardant board is qualified.
A4, when the flame-retardant fire behavior grade, the flame-retardant fire source distance and the flame-retardant duration of the target test flame-retardant plate are all qualified, judging that the ultimate flame-retardant performance corresponding to the target test flame-retardant plate is qualified, otherwise, judging that the ultimate flame-retardant performance corresponding to the target test flame-retardant plate is unqualified.
And secondly, judging the limit environmental protection performance corresponding to the target test flame retardant plate to be qualified, comparing the limit environmental protection influence coefficient corresponding to the target test flame retardant plate with the limit environmental protection influence coefficient corresponding to the set standard flame retardant plate, and judging the environmental protection performance corresponding to the target test flame retardant plate to be qualified if the limit environmental protection influence coefficient corresponding to the target test flame retardant plate is less than or equal to the limit environmental protection influence coefficient corresponding to the standard flame retardant plate.
On one hand, the qualified situation of the target test flame-retardant plate is judged by analyzing the corresponding reference performance and limit performance of the target test flame-retardant plate, the problem that the flame-retardant plate is too single and unilateral in the prior art test is solved, the multi-dimensional analysis of the flame-retardant performance of the flame-retardant plate is realized, the authenticity and scientificity of test data are greatly improved, the reliability and objectivity of the flame-retardant performance analysis result of the flame-retardant plate are further improved, on the other hand, the qualified situation of the environmental protection performance of the target flame-retardant plate is accurately judged by analyzing the environmental information after the test is finished, the potential safety hazard and the environmental protection hazard in the use process of the subsequent flame-retardant plate are further reduced, and the environmental protection performance and the reliability in the subsequent use process are guaranteed.
In a specific embodiment, the cloud storage platform is used for storing size information corresponding to each flame-retardant board type number, allowable damaged size information, a flame-retardant grade interval, standard test information corresponding to each flame-retardant grade and initial environment information in the experiment chamber, wherein the size information comprises an area and a thickness.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (10)
1. Fire safety monitoring system of operation environment conflagration fire control based on fire-retardant board fire control test, its characterized in that includes: the flame retardant plate test information confirmation module is used for acquiring the model corresponding to the target test flame retardant plate, positioning a flame retardant grade interval corresponding to the target test flame retardant plate from the cloud storage platform, recording the lower limit value of the flame retardant grade interval as a reference flame retardant, recording the upper limit value corresponding to the flame retardant grade interval as a limit flame retardant, and extracting standard test information corresponding to the reference flame retardant of the target test flame retardant plate from the cloud storage platform, wherein the test information comprises a fire level, a fire source distance and combustion duration;
the flame retardant plate standard performance testing module is used for adjusting the automatic flame generating device according to standard testing information corresponding to the target test flame retardant plate standard flame retardant, further starting the automatic flame generating device to perform a standard flame retardant performance test, and starting an automatic fire extinguishing device in the experiment cabin to perform automatic fire extinguishing after the test is finished;
the flame-retardant board reference flame-retardant information acquisition module is used for acquiring damaged parameters corresponding to the target test flame-retardant board after the reference performance test is finished and environment information corresponding to the experiment chamber, wherein the damaged information comprises a damaged area and a damaged thickness, and the environment information comprises carbon dioxide concentration, toxic gas concentration and smoke concentration;
the flame retardant board reference performance analysis module is used for analyzing the damaged parameters corresponding to the target test flame retardant board after the reference performance test and the environment information corresponding to the experimental cabin, and judging the standard flame retardant performance and the standard environmental protection performance corresponding to the target test flame retardant board;
the device comprises a flame-retardant plate limit flame-retardant test setting module, a cloud storage platform, a flame-retardant plate limit flame-retardant test setting module and a control module, wherein the flame-retardant plate limit flame-retardant test setting module is used for extracting standard test information corresponding to the limit flame-retardant of a target test flame-retardant plate from the cloud storage platform, setting the test types based on the standard test information corresponding to the limit flame-retardant of the target flame-retardant plate, and dividing each test type into a plurality of test groups, wherein the test types comprise a fire intensity grade test type, a fire source distance test type and a combustion duration test type, so that test information corresponding to each test group corresponding to each test type and each test group in each test type is obtained, the limit flame-retardant performance test is sequentially carried out on the target test flame-retardant plate according to the test information corresponding to each test group in each test type, and then an automatic fire extinguishing device in an experiment cabin is started to carry out automatic fire extinguishing after the test is finished;
the flame retardant plate limit flame retardant information acquisition module is used for acquiring damaged information corresponding to a target flame retardant plate in each experiment group in each experiment type and environment information corresponding to the experiment cabin after limit flame retardant test is finished;
and the flame retardant plate limit performance analysis module is used for screening out limit performance test experiment groups corresponding to the target test flame retardant plate from each experiment type, analyzing test information corresponding to the limit test experiment groups in each experiment type and environment information corresponding to the experiment chamber after limit flame retardant test is finished, and further judging the limit flame retardant performance and the limit environmental protection performance corresponding to the target test flame retardant plate to be qualified.
2. The fire safety monitoring system for fire protection in working environment based on fire resistance test of fire retardant plate of claim 1, wherein: the method comprises the following steps of collecting damaged parameters corresponding to a target test flame-retardant plate after a benchmark performance test is completed and environmental information corresponding to an experimental cabin, wherein the specific collection process is as follows:
acquiring a three-dimensional image corresponding to the target test flame-retardant plate after the standard performance test is finished, and further positioning the damaged area and the damaged thickness corresponding to the target test flame-retardant plate;
the carbon dioxide sensor, the toxic gas detector and the smoke sensor are arranged above the experiment cabin, and environmental information in the experiment cabin is collected in sequence, wherein the environmental information is collected before the automatic fire extinguishing step.
3. The fire safety monitoring system for fire protection in working environment based on fire resistance test of fire retardant plate of claim 1, wherein: analyzing the damage parameters of the flame-retardant plate corresponding to the target test flame-retardant plate after the benchmark performance test is completed, wherein the specific analysis is as follows:
substituting the damaged parameters of the flame-retardant plate corresponding to the target test flame-retardant plate after the benchmark performance test is completed into a calculation formula
Obtaining the damage coincidence coefficient corresponding to the target test flame-retardant plate
，
、
Respectively representing the damaged area and the damaged thickness corresponding to the target test flame-retardant board after the standard performance test is finished,
、
the permissible damaged area and thickness of the target flame-retardant plate stored in the cloud storage platform are respectively,
、
and the weight factors are respectively corresponding to the area and the thickness of the set flame-retardant plate.
4. The fire safety monitoring system for fire protection in working environment based on fire resistance test of fire retardant plate of claim 1, wherein: analyzing the corresponding environmental information of the experiment chamber corresponding to the target test flame-retardant board after the benchmark performance test is finished, wherein the specific analysis is as follows:
substituting corresponding environment information of the experiment chamber corresponding to the target test flame-retardant plate after the target test flame-retardant plate completes the benchmark performance test into a calculation formula
Obtaining a reference environmental protection influence coefficient corresponding to the target test flame-retardant plate
Wherein
、
、
Respectively represents the initial smoke concentration, the carbon dioxide concentration and the toxic gas concentration of the experiment chamber,
、
、
respectively representing the smoke concentration, the carbon dioxide concentration and the toxic gas concentration corresponding to the test chamber after the standard performance test is finished,
、
、
respectively setting the allowable smoke release concentration difference, the allowable carbon dioxide release concentration difference and the allowable toxic gas release concentration difference of the experimental chamber after the standard performance test is finished,
、
、
and the weight factors are respectively corresponding to the smoke concentration, the carbon dioxide concentration and the toxic gas concentration in the set experiment chamber.
5. The fire safety monitoring system for fire protection in working environment based on fire resistance test of fire retardant plate of claim 4, wherein: the standard flame retardant performance and the standard environmental protection performance corresponding to the target test flame retardant plate are subjected to qualified judgment, and the specific judgment process is as follows:
comparing the damaged conformity coefficient corresponding to the target test flame-retardant plate with the damaged conformity coefficient corresponding to the set standard flame-retardant plate, if the damaged conformity coefficient corresponding to the target test flame-retardant plate is greater than or equal to the damaged conformity coefficient corresponding to the set standard flame-retardant plate, judging that the standard flame-retardant performance corresponding to the target test flame-retardant plate is qualified, otherwise, judging that the standard flame-retardant performance corresponding to the target test flame-retardant plate is unqualified;
and comparing the reference environment-friendly influence coefficient corresponding to the target test flame-retardant plate with the set reference environment-friendly influence coefficient corresponding to the standard flame-retardant plate, if the reference environment-friendly influence coefficient corresponding to the target test flame-retardant plate is less than or equal to the set reference environment-friendly influence coefficient corresponding to the standard flame-retardant plate, judging that the environment-friendly performance corresponding to the target test flame-retardant plate is qualified, otherwise, judging that the environment-friendly performance corresponding to the target test flame-retardant plate is unqualified.
6. The fire safety monitoring system for fire protection in working environment based on fire resistance test of fire retardant plate of claim 1, wherein: the method comprises the following steps of screening out a limit performance test experiment group corresponding to a target test flame-retardant plate from each experiment type, wherein the specific screening process comprises the following steps:
and extracting damage parameters of the target test flame-retardant plate corresponding to each experimental group in each experimental type after the limit performance test is finished, further counting to obtain comprehensive damage coefficients corresponding to each experimental group in each experimental type, sequencing the comprehensive damage coefficients corresponding to each experimental group in each experimental type from large to small, and selecting the experimental group corresponding to the largest comprehensive damage coefficient in each experimental type as the limit performance test group corresponding to each experimental type.
7. The fire safety monitoring system for fire protection in working environment based on fire resistance test of fire retardant plate of claim 1, wherein: the method comprises the following steps of analyzing test information corresponding to a limit test performance test group in each test type after the limit flame retardant performance test is completed, wherein the specific analysis process is as follows:
extracting the corresponding fire grade in the limit performance experimental group in the fire grade test type, recording the fire grade as the limit fire grade corresponding to the target flame-retardant plate, and analyzing to obtain the qualified coefficient of the flame-retardant fire grade corresponding to the target flame-retardant plate;
extracting the corresponding fire source distance in the limit performance experimental group in the fire source distance test type, recording the distance as the limit fire source distance, and further calculating according to a calculation formula
Obtaining the corresponding flame-retardant distance qualification coefficient of the target test flame-retardant plate
Wherein L represents the standard fire source distance corresponding to the limit flame retardance of the target test flame retardant plate,
representing the limit fire source distance corresponding to the target test flame-retardant plate;
extracting corresponding combustion duration in the limit performance experimental group in the combustion duration test type, recording the combustion duration as the limit combustion duration, and further calculating according to a calculation formula
Obtaining the corresponding flame-retardant time length qualification coefficient of the target test flame-retardant plate
Wherein T represents the standard burning time length corresponding to the limit flame retardance of the target test flame retardant plate,
and represents the limit burning time corresponding to the target test flame-retardant board.
8. The fire safety monitoring system for fire protection in working environment based on fire resistance test of fire retardant plate of claim 7, wherein: the environmental information corresponding to the experimental cabin after the limit flame retardant performance test is completed is analyzed, and the specific analysis is as follows:
extracting the environmental information in the limit performance test group in each experiment type, comparing the environmental information, screening out the maximum carbon dioxide concentration, the maximum toxic gas concentration and the maximum formaldehyde concentration, and further according to a calculation formula
Obtaining the limit environmental protection influence coefficient corresponding to the target test flame-retardant plate
Wherein
、
、
Respectively represents the maximum smoke concentration, the maximum carbon dioxide concentration and the maximum toxic gas concentration corresponding to the experiment chamber,
、
、
respectively for a set limit of completionThe concentration difference of the released smoke, the concentration difference of the released carbon dioxide and the concentration difference of the released toxic gas are allowed after the flammability performance test.
9. The fire safety monitoring system for fire protection in working environment based on fire resistance test of fire retardant plate of claim 8, wherein: the method comprises the following steps of judging the limit flame retardant property and the limit environmental protection property corresponding to a target test flame retardant plate to be qualified, wherein the specific judgment process comprises the following steps:
the method comprises the following steps of firstly, judging the limit flame retardant property corresponding to a target test flame retardant plate to be qualified, and specifically comprising the following steps:
a1, comparing the qualified coefficient of the limit fire level corresponding to the target test flame-retardant board with the qualified coefficient of the standard limit fire level corresponding to the set standard target test flame-retardant board, and if the qualified coefficient of the limit fire level corresponding to the target test flame-retardant board is greater than or equal to the qualified coefficient of the standard limit fire level corresponding to the standard target test flame-retardant board, judging that the flame-retardant fire level corresponding to the target test flame-retardant board is qualified;
a2, comparing the qualified coefficient of the flame-retardant distance corresponding to the target test flame-retardant plate with the qualified coefficient of the flame-retardant distance corresponding to the set standard target test flame-retardant plate, and if the qualified coefficient of the flame-retardant distance corresponding to the target test flame-retardant plate is greater than or equal to the qualified coefficient of the flame-retardant distance corresponding to the standard target test flame-retardant plate, judging that the distance of the flame-retardant fire source corresponding to the target test flame-retardant plate is qualified;
a3, comparing the qualified coefficient of the flame retardant duration corresponding to the target test flame retardant board with the qualified coefficient of the flame retardant duration corresponding to the set standard target test flame retardant board, and if the qualified coefficient of the flame retardant duration corresponding to the target test flame retardant board is greater than or equal to the qualified coefficient of the flame retardant duration corresponding to the standard target test flame retardant board, judging that the flame retardant duration corresponding to the target test flame retardant board is qualified;
a4, when the flame-retardant fire behavior grade, the flame-retardant fire source distance and the flame-retardant duration of the target test flame-retardant plate are all qualified, judging that the ultimate flame-retardant performance corresponding to the target test flame-retardant plate is qualified, otherwise, judging that the ultimate flame-retardant performance corresponding to the target test flame-retardant plate is unqualified;
and secondly, judging the limit environmental protection performance corresponding to the target test flame retardant plate to be qualified, comparing the limit environmental protection influence coefficient corresponding to the target test flame retardant plate with the limit environmental protection influence coefficient corresponding to the set standard flame retardant plate, and judging the environmental protection performance corresponding to the target test flame retardant plate to be qualified if the limit environmental protection influence coefficient corresponding to the target test flame retardant plate is less than or equal to the limit environmental protection influence coefficient corresponding to the standard flame retardant plate.
10. The fire safety monitoring system for fire protection in working environment based on fire resistance test of fire retardant plate of claim 1, wherein: the system further comprises a cloud storage platform, wherein the cloud storage platform is used for storing size information corresponding to each flame-retardant plate type number, allowable damaged size information, a flame-retardant grade interval, standard test information corresponding to each flame-retardant grade and initial environment information in the experiment chamber, and the size information comprises area and thickness.
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