CN114935533A - Online calibrating device of ultraviolet accelerated weathering tester - Google Patents
Online calibrating device of ultraviolet accelerated weathering tester Download PDFInfo
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Abstract
The utility model provides an online calibrating device of ultraviolet ray acceleration weatherometer, includes: the measuring module is arranged in the cabinet body and connected with the controller, and comprises 5 temperature measuring modules, 1 humidity measuring module, 5 ultraviolet irradiance measuring modules and 1 ultraviolet spectral distribution measuring module; the controller is connected with the wireless communication module and is connected with an upper computer serving as a client through the wireless communication module; the defects that a special, uniform, standard and effective calibration device and method for metering the ultraviolet accelerated weathering tester are lacked in the prior art are effectively overcome.
Description
Technical Field
The application relates to the technical field of online calibration, in particular to an online calibration device for an ultraviolet accelerated weathering tester.
Background
Weather and solar radiation are the main causes of the damage to the performance of the high molecular material, and the damage comprises aging phenomena such as light loss, color fading, yellowing, cracking, peeling, embrittlement, stickiness, hardness and poor mechanical performance, so that the service life of the high molecular material is greatly shortened. Even room light and sunlight transmitted through glass windows can cause degradation of some materials, of which light colored ABS is the most well known.
In sunlight, ultraviolet light with a wavelength range of 290nm to 400nm is very easy to initiate a radical chain type photo-oxygen aging reaction of a high polymer material due to high energy and the participation of oxygen, so that a polymer macromolecule chain is cut off or generates certain cross-linking, and the performance of the high polymer material is directly influenced, namely, the ultraviolet light in the sunlight is a main factor for causing the photo-aging of the high polymer material.
Worldwide annual product losses due to aging reach billions of dollars, and aging of materials is currently evaluated mainly by 2 methods: outdoor exposure and artificial accelerated aging, and natural environmental aging is the best method for evaluating the actual service life of the material, but the test period is long, and the environmental conditions are not controllable, so the practical application of the material is limited. In order to shorten the test time, an artificial accelerated aging test method is generally adopted, and atmospheric environmental conditions or certain specific environmental conditions are simulated in a room or equipment. The artificial accelerated aging is roughly classified into three types, namely carbon arc lamp simulated accelerated aging, fluorescent ultraviolet accelerated aging and xenon arc lamp accelerated aging. Carbon arc lamp simulated accelerated aging test boxes were the earliest because of the disadvantages of high maintenance cost, uncorrectable performance, narrow simulated spectral range and the like, and are rarely used at present. Researches show that ultraviolet light in sunlight, especially energy in a wave band below 360nm, is a main factor causing material aging, and an ultraviolet aging test box which mainly uses a UVA-340 lamp tube as a test light source is developed in the 70 th 20 th century by utilizing the principle. The main radiation wave band of the UVA-340 lamp tube is concentrated on 295-400 nm, and is at a peak value at 340nm, so that the UVA-340 lamp tube is named. The light source of the lamp tube has high goodness of fit with the ultraviolet wave band of sunlight below 360nm, and is particularly suitable for the ultraviolet weather-resistant test of outdoor products.
The ultraviolet accelerated weather resistance testing machine adopts a fluorescent ultraviolet lamp as a light source, carries out accelerated weather resistance test on a material by simulating ultraviolet radiation and condensation in natural sunlight so as to obtain a weather resistance result of the material, can simulate environmental conditions such as ultraviolet, rain, high temperature, condensation, darkness and the like in natural weather, combines the conditions into a cycle by paying attention to the conditions, and automatically executes the cycle times. The ultraviolet accelerated weathering tester is used for sunlight resistance of non-metallic materials and aging tests of artificial light sources, has become the world standard of laboratory accelerated weathering tests, and meets the standards and national standards of ISO, ASTM, DIN, JIS, SAE, BS, ANSI, GM, U.S. GOVT, etc. Aging and light resistance of the product is of paramount importance to many manufacturers. The reliable aging test data can make accurate correlation prediction on the weather resistance (aging resistance) of the product, and is beneficial to screening and optimizing materials and formulas.
The performance of the ultraviolet accelerated weathering tester directly influences the aging effect of materials, influences the judgment of the material performance, measures and calibrates the ultraviolet accelerated weathering tester, and ensures that the measurement value is accurate and the units are uniform. The rapid development of national economy has promoted the increasing demand for various new materials, which requires that the measurement and guarantee work keep pace with the rapid development of products while new products and new technologies are rapidly emerging.
The current metering situation of the ultraviolet accelerated weathering tester is as follows:
the calibration of the ultraviolet accelerated weathering tester was traced from four magnitudes: firstly, the temperature is the accuracy of the temperature value when the simulated ultraviolet measurement test is carried out; secondly, humidity; third, ultraviolet central wavelength; and fourthly, measuring whether the intensity of the ultraviolet ray meets the requirement of the test.
In order to obtain an accurate aging test result, the control of the irradiance of the ultraviolet accelerated weathering tester is particularly important, so that an important index of the ultraviolet accelerated weathering tester for the accuracy of irradiance measurement is provided. If the irradiance measurement is inaccurate, the result of the artificial accelerated aging test is inconsistent with the actual result. If the evaluation result of the aging test is too aggressive, the aging resistance of the product is possibly not up to the standard, and even the personal safety is possibly endangered; if the evaluation result of the aging test is too conservative, unnecessary waste may be caused to enterprises.
(1) Aspects of metering laws and regulations
With the development of global science and technology and industry, the demand of each industry for high-accuracy ultraviolet radiation measurement is increasing day by day, so that a more scientific and reliable quantity value tracing method is adopted by a measurement department, the measurement level of ultraviolet radiation is continuously improved, and more accurate and reliable measurement standards are provided for each industry. In 2017, a national standard device for the short-wave ultraviolet spectrum radiation illumination is newly built by the Chinese measurement science research institute, and the blank of the standard of the wave band of 200 nm-350 nm is filled.
In recent years, the measurement regulations relating to the ultraviolet ray accelerated weathering test apparatus include: JJF 1525-2015 radiation illuminance parameter calibration standard for xenon-arc lamp artificial weathering test device (2015, 9 months and 15 days), which is a calibration standard established for artificial weathering light radiation ageing test box in the field of material ageing, and is suitable for (spectrum) radiation illuminance calibration of xenon-arc lamp artificial weathering test device in wavelength ranges of 340nm, 420nm, 300 nm-400nm, 400 nm-800 nm, 300 nm-800 nm and the like. Burn-in chamber calibration for other types of light sources, such as UV fluorescent lamp burn-in chambers, metal halide lamp burn-in chambers, etc., may be performed with reference to this standard. Three calibration methods for the burn-in test apparatus are described in the calibration specifications: radiometric, spectroradiometer and water-cooled xenon arc lamp methods.
JJF 1101 & lt 2019 & gt environmental test equipment temperature and humidity parameter calibration standard & gt
(2) Aspects of metrological standards
At present, the domestic market has an irradiator capable of measuring the irradiance of an ultraviolet band, most of the irradiators are used in the fields of meteorology, agriculture and medical treatment, and the measuring band of the irradiator does not meet the requirement of a laboratory light source aging test. A manufacturer abroad provides a matched ultraviolet aging box calibrator, which is only limited to calibrating aging equipment produced by the manufacturer, so that the equipment is high in price, and is controlled to be sold, and the irradiation calibrator can be matched and purchased only when the aging box product is purchased. Such as: a Universal calibrator System (UC) manufactured by Q-Lab corporation, USA, was used to calibrate the temperature in the Q-SUN xenon test chamber and the irradiance in the QUV and Q-SUN test chambers. The portable solar energy irradiance and temperature sensor is composed of a handheld display, and can be used together with all irradiance and temperature sensors in a plug-and-play mode. The Q-Lab also provides service and support for existing irradiance meters (CR10 and CR20) and temperature calibrators (CT 202). The system can be used with any QUV UV weatherometer or Q-SUN xenon lamp test chamber.
In China, some brand aging test boxes generally do not provide a calibration scheme which can be implemented by a user, and the user can only entrust a manufacturer or a metering mechanism to carry out calibration. Some simple equipment produced by small factories has no irradiance calibrated at all before leaving the factory, and even has no irradiance monitoring instrument installed.
In short, at present, a special, uniform, standard and effective calibration device and method for the ultraviolet accelerated weathering tester for measurement are lacked at home and abroad.
Disclosure of Invention
In order to solve the problems, the application provides an online calibration device and a transmission method for an ultraviolet acceleration weather-resistant testing machine, and the defect that a dedicated, uniform, standard and effective calibration device and method for metering the ultraviolet acceleration weather-resistant testing machine are lacked in the prior art is effectively overcome.
In order to overcome the deficiencies in the prior art, the application provides a solution of an online calibrating device of an ultraviolet accelerated weathering tester, which specifically comprises the following steps:
the utility model provides an online calibrating device of ultraviolet ray acceleration weatherometer, includes:
the measuring modules are arranged in the cabinet body and connected with the controller, and each measuring module comprises 5 temperature measuring modules 1, 1 humidity measuring module 2, 5 ultraviolet irradiance measuring modules 3 and 1 ultraviolet spectral distribution measuring module 4;
the controller is connected with the wireless communication module and is connected with an upper computer serving as a client through the wireless communication module;
the 5 temperature measuring modules 1, the 1 humidity measuring module 2, the 5 ultraviolet irradiance measuring modules 3 and the 1 ultraviolet spectral distribution measuring module 4 are all arranged on the sensor measuring module fixing support 5;
the sensor measuring module fixing bracket 5 is connected with the central point fixing seat 6.
Further, the temperature measurement module 1 comprises a temperature probe 1-1, an upper shell 1-2, a sealing ring 1-3, a lower shell 1-4, a main control circuit board 1-5, a high-temperature-resistant battery 1-6 and a wireless charging module 1-7;
the upper shell 1-2 and the lower shell 1-4 are sealed together through a sealing ring from top to bottom to form a shell, the temperature probe 1-1 extends out of the top wall of the upper shell 1-2, the main control circuit board 1-5, the high temperature resistant battery 1-6 and the wireless charging module 1-7 are all arranged in the shell, and the temperature probe, the main control circuit board 1-5, the high temperature resistant battery 1-6 and the wireless charging module 1-7 are sequentially connected.
Further, the humidity measuring module 2 comprises a humidity probe 2-1, an upper shell 2-2, a sealing ring 2-3, a lower shell 2-4, a main control circuit board 2-5, a high-temperature-resistant battery 2-6 and a wireless charging module 2-7;
the upper shell 2-2 and the lower shell 2-4 are sealed together through a sealing ring from top to bottom to form a shell, the humidity probe 2-1 extends out of the top wall of the upper shell 2-2, the main control circuit board 2-5, the high temperature resistant battery 2-6 and the wireless charging module 2-7 are all arranged in the shell, and the humidity probe, the main control circuit board 2-5, the high temperature resistant battery 2-6 and the wireless charging module 2-7 are sequentially connected.
Further, the ultraviolet irradiance measuring module 3 comprises an irradiance sensor 3-1, an upper shell 3-2, a sealing ring 3-3, a lower shell 3-4, a main control circuit board 3-5, a high-temperature-resistant battery 3-6 and a wireless charging module 3-7;
the irradiance sensor 3-1 extends out of the top wall of the upper shell 3-2, the main control circuit board 3-5, the high-temperature-resistant battery 3-6 and the wireless charging module 3-7 are all arranged in the shell, and the irradiance sensor, the main control circuit board 3-5, the high-temperature-resistant battery 3-6 and the wireless charging module 3-7 are sequentially connected.
Further, the ultraviolet spectral distribution measuring module 4 comprises an optical wavelength sensor 4-1, an upper shell 4-2, a sealing ring 4-3, a lower shell 4-4, a main control circuit board 4-5, a high-temperature-resistant battery 4-6 and a wireless charging module 4-7;
the upper shell 4-2 and the lower shell 4-4 are sealed together through a sealing ring from top to bottom to form a shell, the optical wavelength sensor 4-1 extends out of the top wall of the upper shell 4-2, the main control circuit board 4-5, the high-temperature-resistant battery 4-6 and the wireless charging module 4-7 are all arranged in the shell, and the irradiance sensor, the main control circuit board 4-5, the high-temperature-resistant battery 4-6 and the wireless charging module 4-7 are sequentially connected.
Further, the sensor measuring module fixing support 5 comprises an angular point fixing seat 5-1, an expansion rod 5-2 and a sensor placing groove 5-4;
sensor placing grooves 5-4 are formed in the top walls of the corner fixing seat 5-1 and the central point fixing seat 6;
two ends of the telescopic rod 5-2 are respectively connected with the angular point fixing seat 5-1 and the central point fixing seat 6.
Further, the measurement mode of the temperature measurement module 1 is as follows: the ADS1147 chip is used as a constant current source to provide constant current, the resistance value of the PT100 platinum thermal resistor changes along with the change of temperature, then the ADS1147 chip collects the voltage change at two ends of the platinum thermal resistor and converts the voltage change into a digital signal, then the controller reads an AD channel of the ADS1147 through an SPI protocol to obtain a currently measured numerical value, and finally the controller transmits a corresponding standard value to an upper computer for entering display through the calculation of a linear formula.
Further, humidity measurement module 2 adopts AM2305 humiture composite sensor who contains the output of calibrated digital signal to carry out the acquisition of humidity parameter, and AM2305 humiture composite sensor acquires the internal humidity value of cabinet, handles analog signal for digital signal and transmits for the controller through IIC communication protocol, and the controller will be measured standard value through digital filtering conversion and transmit for the host computer through wireless communication and show.
Further, the ultraviolet irradiance measuring module 3 and the ultraviolet spectral distribution measuring module 4 adopt UV lamp tubes with the wavelength range of 280nm-400nm to simulate sunlight for acceleration test; the OHSP350UVS chip is specially used for measuring the spectral radiation illumination and wavelength of the ultraviolet full-wave band; the measuring wavelength range of the HPL-200UV ultraviolet radiation measuring module is 200nm-400 nm.
The beneficial effect of this application does:
the invention improves the product quality and reliable aging test data of the ultraviolet accelerated weathering tester, makes accurate correlation prediction on the weathering (aging) resistance of the product, is beneficial to screening and optimizing materials and formulas, and the accuracy and reliability of the test data are important guarantee for improving the quality of related products. The defects that a special, uniform, standard and effective calibration device and method for metering the ultraviolet accelerated weathering tester are lacked in the prior art are effectively overcome.
Drawings
FIG. 1 is a view showing the overall structure of an ultraviolet ray acceleration weathering tester.
Fig. 2 is a block diagram of a measurement module.
Fig. 3 is a block diagram of a temperature measurement module.
FIG. 4 is a block diagram of a moisture measurement module.
Fig. 5 is a block diagram of an ultraviolet irradiance measurement module.
Fig. 6 is a structural diagram of an ultraviolet wavelength measuring module.
Fig. 7 is a structural view of a sensor measuring module fixing bracket.
Detailed Description
In view of the fact that the ultraviolet accelerated weathering tester is widely used for research and development, quality control and material verification, quality supervision on the ultraviolet accelerated weathering tester is strengthened, accuracy and reliability of test data and magnitude traceability unification of the ultraviolet accelerated weathering tester are guaranteed, accuracy of a material light aging test result is guaranteed, further improvement of material research and development level and product competitiveness is facilitated, and the ultraviolet accelerated weathering tester has positive significance for promoting industry technology progress and scientific and technological industry development.
The working principle of the ultraviolet accelerated weathering tester is as follows: for many products, aging resistance and light stability are important. Reproducible, reliable weathering test data can be obtained using a uv accelerated weatherometer in as short a few weeks or months. The short wavelength ultraviolet illumination and condensation circulating system can vividly simulate the damage of sunlight, dew, rainwater and the like to the material.
The ultraviolet accelerated weathering tester adopts a fluorescent ultraviolet lamp to simulate the aging of sunlight on materials. Although Ultraviolet (UV) energy only accounts for 5% of the total energy of sunlight, it is a major factor in the degradation of outdoor product performance, so that the degradation aging of polymer materials can be tested only by ultraviolet irradiation.
The ultraviolet accelerated weathering tester can be used for installing various types of ultraviolet lamp tubes. The total UV energy and spectrum of each tube is different. The spectrum of the UVA-340 lamp is in the range of 295nm to 365nm, which simulates the ultraviolet rays of sunlight very well, so the UVA-340 test correlates well with outdoor insolation. The UVB-313 lamp tube emits short-wave ultraviolet light which is stronger than the sunlight ultraviolet light on the surface of the earth, and the test speed can be improved to the maximum extent. The customer should select the appropriate lamp tube according to the different use conditions of the product.
The ultraviolet accelerated weathering tester is suitable for sunlight resistance and artificial light source aging tests of non-metallic materials. The source uses 8 ultraviolet fluorescent lamps rated at 40W as the light source. The UV fluorescent tubes were distributed on both sides of the machine, 4 on each side. The design and the manufacture are designed according to corresponding standard terms of standard GB/T14522 'artificial climate accelerated test method for plastic, paint and rubber materials for mechanical industrial products', GB/T16422.3 'light source exposure test method for plastic laboratories', and the like. The ultraviolet lamp tube adopts 40W ultraviolet rays with the wavelength of 280nm-400nm and ultraviolet rays with the wavelength of 280 nm-320 nm.
The water tank at the bottom of the test chamber of the ultraviolet accelerated weathering tester is used for heating to generate steam, and at higher temperature, the hot steam keeps 100% of relative humidity in the test chamber. The test sample actually forms the side wall of the test chamber, with the other side of the sample exposed to the ambient air within the chamber. The relatively cool air in the chamber causes the surface of the test specimen to be several degrees cooler than the temperature of the hot vapor in the test chamber. This temperature difference causes water in liquid form to slowly condense on the sample surface through a condensation cycle. In addition to the standard condensation mechanism, the water spray system can be used to simulate other damage conditions such as thermal shock or mechanical corrosion. The user can operate the uv accelerated weatherometer to generate a humidity cycle with uv light, a simulation very similar to natural aging.
The temperature control system of the ultraviolet accelerated weathering tester can improve the test temperature for accelerated tests. Generally speaking, the destructive effect of illumination is remarkably increased in a higher temperature environment, and the temperature in the test process is usually adjusted by controlling the temperature of a blackboard (non-insulating blackboard), the temperature of a black mark (insulating blackboard), the temperature of air in the test chamber and the like in the test chamber, and generally can be set to 80 ℃ at most.
Ultraviolet ray accelerated weathering testers have been widely used globally, and have become the world standard for laboratory accelerated weathering tests: ultraviolet ray accelerated weatherometer is widely used in the whole industry chain of the film material industry in conformity with standards and national standards such as ISO, ASTM, DIN, JIS, SAE, BS, ANSI, GM, u.s.govt, and in addition to more widely used industries such as: coating inks paints, resins, plastics, printed packaging, adhesives, the automotive and motorcycle industries, cosmetics, metals, electronics, electroplating, pharmaceuticals, and the like. The reliable aging test data of the ultraviolet accelerated weathering tester can make accurate correlation prediction on the weathering (aging) resistance of the product, and is beneficial to screening and optimizing materials and formulas, and the accuracy and reliability of the test data are important guarantees for improving the quality of related products. Therefore, the research on related metering tracing technology and method is urgently needed.
Problem and requirement 1: the problems of lack of measurement and calibration standards and incapability of effectively tracing the source of the existing ultraviolet accelerated weathering tester are solved.
Problem and requirement 2: the multi-parameter online calibrating device of the ultraviolet accelerated weathering tester is lacked. The device is based on a wireless ultraviolet sensor module, a wireless temperature sensor module, a wireless humidity sensor module, a wireless ultraviolet irradiance and ultraviolet wavelength sensor module, a wireless communication and upper computer automatic data recording and data processing module, and is used for carrying out detection and calibration on indexes such as the wavelength range of ultraviolet irradiation, ultraviolet irradiance within a specified wavelength range, ultraviolet irradiance unevenness, ultraviolet irradiance instability, temperature and humidity accuracy, uniformity, volatility and the like in a test box, solving the problem that an ultraviolet accelerated weathering tester cannot effectively trace the source, providing accurate quantity tracing for process supervision of the ultraviolet accelerated weathering tester, improving the reliability and effectiveness of factory inspection, production quality inspection and application results of the ultraviolet accelerated weathering tester, and promoting the standardization and quality inspection technology upgrade of ultraviolet accelerated weathering tester products, leading and driving the high-quality development and progress of the related industry of the ultraviolet accelerated weathering tester.
The present application will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1 to 7, the on-line calibration apparatus for the ultraviolet accelerated weathering tester includes:
the measuring modules are arranged in the cabinet body and connected with the controller, and each measuring module comprises 5 temperature measuring modules 1, 1 humidity measuring module 2, 5 ultraviolet irradiance measuring modules 3 and 1 ultraviolet spectral distribution measuring module 4;
the controller is connected with the wireless communication module and is connected with an upper computer serving as a client through the wireless communication module;
the 5 temperature measuring modules 1, the 1 humidity measuring module 2, the 5 ultraviolet irradiance measuring modules 3 and the 1 ultraviolet spectral distribution measuring module 4 are all arranged on the sensor measuring module fixing support 5;
the sensor measuring module fixing bracket 5 is connected with the central point fixing seat 6.
Because ultraviolet ray accelerated weathering test machine calibration parameter is many, and the sensor module of measurement has 12, and the data volume of gathering is very big, relies on manual mode record and calculation not only intensity of labour is big and make mistakes easily, therefore it is very necessary to develop suitable host computer software to carry out automatic acquisition, automatic recording and automatic data processing to a large amount of experimental data, has not only improved detection efficiency greatly, has also promoted the accuracy of calculation.
The difficulty is that the data transmission speed and the data integrity of the 12 measurement modules are guaranteed, and the 12 modules are identified by the upper computer, so that once the data except the problem can be accurately positioned, the problem of the ultraviolet ray acceleration weather-proof tester is found. And aiming at the problems, the WiFi module is adopted for data communication, and unique address allocation is carried out on each module, so that the related problems are solved.
These 12 modules are used for measuring ultraviolet ray accelerated weathering test machine's temperature degree of accuracy, distribution uniformity, temperature fluctuation nature and humidity degree of accuracy, can measure the degree of accuracy, distribution uniformity and the fluctuation nature of ultraviolet irradiance simultaneously and the spectral distribution degree of accuracy of ultraviolet ray. The 12 measurement modules transmit the acquired data to an upper computer of the computer in a wireless transmission mode (such as Bluetooth, WiFi and GPRS/4G).
The temperature measurement module 1 comprises a temperature probe 1-1, an upper shell 1-2, a sealing ring 1-3, a lower shell 1-4, a main control circuit board 1-5, a high-temperature-resistant battery 1-6 and a wireless charging module 1-7;
the upper shell 1-2 and the lower shell 1-4 are sealed together through a sealing ring from top to bottom to form a shell, the temperature probe 1-1 extends out of the top wall of the upper shell 1-2, the main control circuit board 1-5, the high temperature resistant battery 1-6 and the wireless charging module 1-7 are all arranged in the shell, and the temperature probe, the main control circuit board 1-5, the high temperature resistant battery 1-6 and the wireless charging module 1-7 are sequentially connected.
The upper shell is made of 304 stainless steel, so that the problem of aging caused by direct ultraviolet radiation is solved, and the lower shell is made of POM (polyoxymethylene) materials, so that signals are prevented from being shielded by all metal materials. The middle of the double-layer sealing ring is provided with a double-layer sealing ring, the lower end of the double-layer sealing ring is wirelessly charged to supply power to the charging module, and the design of a full sealing structure is realized in a wireless data transmission mode. Has the characteristics of high mechanical strength, radiation aging resistance, water vapor corrosion resistance, high temperature resistance and the like.
The humidity measuring module 2 comprises a humidity probe 2-1, an upper shell 2-2, a sealing ring 2-3, a lower shell 2-4, a main control circuit board 2-5, a high-temperature-resistant battery 2-6 and a wireless charging module 2-7;
the upper shell 2-2 and the lower shell 2-4 are sealed together through a sealing ring from top to bottom to form a shell, the humidity probe 2-1 extends out of the top wall of the upper shell 2-2, the main control circuit board 2-5, the high temperature resistant battery 2-6 and the wireless charging module 2-7 are all arranged in the shell, and the humidity probe, the main control circuit board 2-5, the high temperature resistant battery 2-6 and the wireless charging module 2-7 are sequentially connected.
The upper shell is made of 304 stainless steel, so that the problem of aging caused by direct ultraviolet radiation is solved, and the lower shell is made of POM (polyoxymethylene) materials, so that signals are prevented from being shielded by all metal materials. The middle of the lower end of. Has the characteristics of high mechanical strength, radiation aging resistance, water vapor corrosion resistance, high temperature resistance and the like.
The ultraviolet irradiance measuring module 3 comprises an irradiance sensor 3-1, an upper shell 3-2, a sealing ring 3-3, a lower shell 3-4, a main control circuit board 3-5, a high-temperature-resistant battery 3-6 and a wireless charging module 3-7;
the irradiance sensor 3-1 extends out of the top wall of the upper shell 3-2, the main control circuit board 3-5, the high-temperature-resistant battery 3-6 and the wireless charging module 3-7 are all arranged in the shell, and the irradiance sensor, the main control circuit board 3-5, the high-temperature-resistant battery 3-6 and the wireless charging module 3-7 are sequentially connected.
The upper shell is made of 304 stainless steel, so that the problem of aging caused by direct ultraviolet radiation is solved, and the lower shell is made of POM (polyoxymethylene) materials, so that signals are prevented from being shielded by all metal materials. The middle of the double-layer sealing ring is provided with a double-layer sealing ring, the lower end of the double-layer sealing ring is wirelessly charged to supply power to the charging module, and the design of a full sealing structure is realized in a wireless data transmission mode. Has the characteristics of high mechanical strength, radiation aging resistance, water vapor corrosion resistance, high temperature resistance and the like.
The ultraviolet spectral distribution measuring module 4 comprises an optical wavelength sensor 4-1, an upper shell 4-2, a sealing ring 4-3, a lower shell 4-4, a main control circuit board 4-5, a high-temperature-resistant battery 4-6 and a wireless charging module 4-7;
the upper shell 4-2 and the lower shell 4-4 are sealed together through a sealing ring from top to bottom to form a shell, the optical wavelength sensor 4-1 extends out of the top wall of the upper shell 4-2, the main control circuit board 4-5, the high-temperature-resistant battery 4-6 and the wireless charging module 4-7 are all arranged in the shell, and the irradiance sensor, the main control circuit board 4-5, the high-temperature-resistant battery 4-6 and the wireless charging module 4-7 are sequentially connected.
The upper shell is made of 304 stainless steel, so that the problem of aging caused by direct ultraviolet radiation is solved, and the lower shell is made of POM (polyoxymethylene) materials, so that signals are prevented from being shielded by all metal materials. The middle of the lower end of. Has the characteristics of high mechanical strength, radiation aging resistance, water vapor corrosion resistance, high temperature resistance and the like.
The sensor measuring module fixing support 5 comprises an angular point fixing seat 5-1, a telescopic rod 5-2 and a sensor placing groove 5-4;
sensor placing grooves 5-4 are formed in the top walls of the corner fixing seat 5-1 and the central point fixing seat 6;
two ends of the telescopic rod 5-2 are respectively connected with the angular point fixing seat 5-1 and the central point fixing seat 6.
304 stainless steel materials are selected for use to the telescopic link, and the fixing base adopts aluminum alloy CNC integrated processing, and surface anodic oxidation handles, overall structure is light, firm, waterproof, corrosion-resistant and ageing. The length of the telescopic rod and the included angle a can be adjusted, and the device is basically suitable for calibration and detection of ultraviolet accelerated weathering testers of various manufacturers and sizes on the market.
The measurement mode of the temperature measurement module 1 is as follows: the ADS1147 chip is used as a constant current source to provide constant current, the resistance value of the PT100 platinum thermal resistor changes along with the change of temperature, then the ADS1147 chip collects the voltage change at two ends of the platinum thermal resistor and converts the voltage change into a digital signal, then the controller reads an AD channel of the ADS1147 through an SPI protocol to obtain a currently measured numerical value, and finally the controller transmits a corresponding standard value to an upper computer for entering display through the calculation of a linear formula. The comprehensive test shows that the temperature measured by the circuit is accurate and reliable, the repeatability is good, and the specific requirements of the developed equipment on temperature measurement are basically met.
The humidity measurement module 2 considers a harsh environment in the ultraviolet acceleration weather-resistant testing machine box, an AM2305 temperature and humidity composite sensor containing calibrated digital signal output is adopted to acquire humidity parameters, the AM2305 temperature and humidity composite sensor acquires humidity values in the cabinet, analog signals are processed into digital signals and transmitted to the controller through an IIC communication protocol, and the controller transmits measured standard values to the upper computer for display through digital filtering conversion.
The AM2305 temperature and humidity composite sensor has wide humidity measurement range, can meet the requirement of measurement environment on measurement of higher humidity, and simultaneously, the controller performs segmented processing on signals transmitted by the sensor, divides the signals into a middle-humidity section and a low-humidity section with 0-80% RH and a high-humidity section with 80-100% RH for linear fitting, so that the measurement accuracy is further improved.
The ultraviolet irradiance measuring module 3 and the ultraviolet spectral distribution measuring module 4 adopt UV lamp tubes with the wavelength range of 280nm-400nm to simulate sunlight for an acceleration test; the OHSP350UVS chip is specially used for measuring the spectral radiation illuminance and wavelength of all ultraviolet bands, has higher measurement precision and can be used for detecting and analyzing the ultraviolet spectrum at the central position; the HPL-200UV ultraviolet radiation measuring module has a measuring wavelength range of 200nm-400nm and is widely applied to aging tests or tests of intensity and energy in sunlight. Meanwhile, the two devices support wireless communication, and the measured required data can be transmitted to the upper computer software through a Bluetooth communication protocol for analysis and processing. Fully meets the basic requirements of developing equipment.
The invention discloses a multi-parameter online calibration device for an ultraviolet accelerated weathering tester, which has the technical indexes that:
wavelength of ultraviolet ray: (300-370) nm, +/-2 nm
Ultraviolet irradiance: 0.1W/m 2 ～2.0W/m 2 ，±5％
Temperature: (10-90) DEG C and +/-0.2 DEG C
Humidity: (30% -100%) RH, +/-2% RH
The ultraviolet accelerated weathering tester of the invention calibrates standard technical indexes:
irradiance range: UVA 340: 0.3W/m 2 ～1.1W/m 2
UVA313：0.3W/m 2 ～1.35W/m 2
Temperature range: RT +10 to 80 DEG C
Humidity range: more than or equal to 50 +/-3 percent RH
Temperature uniformity: +/-3 deg.C
Temperature fluctuation degree: . + -. 0.5 ℃.
The invention solves the following problems:
1) the defect of the calibration method of the ultraviolet accelerated weathering tester is overcome;
2) the defect of a multi-parameter online calibration device of the ultraviolet accelerated weathering tester is solved;
3) the design of the wireless sensor under high temperature, high humidity and high ultraviolet intensity is broken through;
4) the positioning problem of multi-point and multi-parameter testing of testing machines with different specifications and sizes is broken through;
5) the problem of reliable transmission of multipoint signals in a severe closed environment is solved.
The present application has been described above in an illustrative manner by way of embodiments, and it will be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, and various changes, modifications and substitutions can be made without departing from the scope of the present application.
Claims (9)
1. The utility model provides an online calibrating device of ultraviolet ray weatherometer with higher speed which characterized in that includes:
the measuring module is arranged in the cabinet body and connected with the controller, and comprises 5 temperature measuring modules, 1 humidity measuring module, 5 ultraviolet irradiance measuring modules and 1 ultraviolet spectral distribution measuring module;
the controller is connected with the wireless communication module and is connected with an upper computer serving as a client through the wireless communication module;
the 5 temperature measuring modules, the 1 humidity measuring module, the 5 ultraviolet irradiance measuring modules and the 1 ultraviolet spectral distribution measuring module are all arranged on the sensor measuring module fixing bracket;
the sensor measuring module fixing support is connected with the central point fixing seat.
2. The on-line calibration device of the ultraviolet accelerated weathering tester according to claim 1, wherein the temperature measurement module comprises a temperature probe, an upper shell, a sealing ring, a lower shell, a main control circuit board, a high temperature resistant battery and a wireless charging module;
the upper casing and the lower casing are from top to bottom and form a casing through the sealing washer is sealed together, the temperature probe stretches out the roof of upper casing, and main control circuit board, high temperature resistant battery and wireless charging module all set up in the casing, temperature probe, main control circuit board, high temperature resistant battery and wireless charging module link to each other in proper order.
3. The on-line calibration device for the ultraviolet accelerated weathering tester according to claim 1, wherein the humidity measurement module comprises a humidity probe, an upper shell, a sealing ring, a lower shell, a main control circuit board, a high temperature resistant battery and a wireless charging module;
the upper casing and the lower casing are from top to bottom and form the casing via the sealing washer is sealed together, the humidity probe stretches out the roof of upper casing, and main control circuit board, high temperature resistant battery and wireless charging module all set up in the casing, humidity probe, main control circuit board, high temperature resistant battery link to each other with wireless charging module order.
4. The on-line calibration device of the ultraviolet accelerated weathering tester of claim 1, wherein the ultraviolet irradiance measuring module comprises an irradiance sensor, an upper shell, a sealing ring, a lower shell, a main control circuit board, a high temperature resistant battery and a wireless charging module;
the irradiance sensor, the main control circuit board, the high-temperature-resistant battery and the wireless charging module are all arranged in the shell, and the irradiance sensor, the main control circuit board, the high-temperature-resistant battery and the wireless charging module are sequentially connected.
5. The on-line calibration device for the ultraviolet accelerated weathering tester according to claim 1, wherein the ultraviolet spectral distribution measuring module includes an optical wavelength sensor, an upper shell, a sealing ring, a lower shell, a main control circuit board, a high temperature resistant battery and a wireless charging module;
the utility model discloses a wireless charging module, including epitheca and inferior valve top-down, the sealed casing that forms together of seal ring of the passing through of epitheca and inferior valve top-down, optical wavelength sensor stretches out the roof of epitheca, and main control circuit board, high temperature resistant battery and wireless charging module all set up in the casing, irradiance sensor, main control circuit board, high temperature resistant battery link to each other with wireless charging module order.
6. The on-line calibration device of the ultraviolet ray acceleration weathering tester as claimed in claim 1, wherein the sensor measurement module fixing bracket includes an angular point fixing base, a telescopic rod and a sensor placement groove;
sensor placing grooves are formed in the top walls of the angular point fixing seat and the central point fixing seat;
the two ends of the telescopic rod are respectively connected with the angular point fixing seat and the central point fixing seat.
7. The on-line calibration device for the ultraviolet accelerated weathering tester according to claim 1, characterized in that the temperature measurement module has the following measurement modes: the ADS1147 chip is used as a constant current source to provide constant current, the resistance value of the PT100 platinum thermal resistor changes along with the change of temperature, then the ADS1147 chip collects the voltage change of the two ends of the platinum thermal resistor and converts the voltage change into a digital signal, then the controller reads an AD channel of the ADS1147 through an SPI protocol to obtain a currently measured value, and finally the controller transmits a corresponding standard value to an upper computer for entry display through the calculation of a linear formula.
8. The on-line calibration device of the ultraviolet accelerated weathering tester according to claim 1, characterized in that the humidity measurement module adopts an AM2305 temperature and humidity composite sensor containing calibrated digital signal output to obtain humidity parameters, the AM2305 temperature and humidity composite sensor obtains humidity value in the cabinet body, analog signals are processed into digital signals and transmitted to the controller through IIC communication protocol, and the controller transmits measured standard values to the upper computer through wireless communication for display through digital filtering conversion.
9. The on-line calibration device of the ultraviolet accelerated weathering tester as claimed in claim 1, wherein the ultraviolet irradiance measuring module 3 and the ultraviolet spectral distribution measuring module 4 use UV lamp tubes with wavelength range of 280nm-400nm to simulate sunlight for accelerated test; the OHSP350UVS chip is specially used for measuring the spectral radiation illumination and wavelength of the ultraviolet full-wave band; the measuring wavelength range of the HPL-200UV ultraviolet radiation measuring module is 200nm-400 nm.
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